8 Message functional definitions and contents

24.3013GPPNon-Access-Stratum (NAS) protocol for Evolved Packet System (EPS)Release 18Stage 3TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

8.1 Overview

This clause defines the structure of the messages of the Layer 3 (L3) protocols defined in the present document. These are standard L3 messages as defined in 3GPP TS 24.007 [12].

Each definition given in the present clause includes:

a) a brief description of the message direction and use, including whether the message has:

1. Local significance, i.e. relevant only on the originating or terminating access;

2. Access significance, i.e. relevant in the originating and terminating access, but not in the network;

3. Dual significance, i.e. relevant in either the originating or terminating access and in the network; or

4. Global significance, i.e. relevant in the originating and terminating access and in the network.

b) a table listing the Information Elements (IE) known in the message and the order of their appearance in the message. All IEs that may be repeated are explicitly indicated (The V, LV and LV-E formatted IEs, which compose the imperative part of the message, occur before the T, TV, TLV and TLV-E formatted IEs which compose the non-imperative part of the message, see 3GPP TS 24.007 [12]). In a (maximal) sequence of consecutive IEs with half octet length, the first IE with half octet length occupies bits 1 to 4 of octet N, the second IE bits 5 to 8 of octet N, the third IE bits 1 to 4 of octet N+1 etc. Such a sequence always has an even number of elements.

For each information element the table indicates:

1. The Information Element Identifier (IEI), in hexadecimal notation, if the IE has format T, TV, TLV or TLV‑E. If the IEI has half octet length, it is specified by a notation representing the IEI as a hexadecimal digit followed by a "-" (example: B-).

NOTE: The same IEI can be used for different information element types in different messages of the same protocol.

2. The name of the information element (which may give an idea of the semantics of the element). The name of the information element followed by "IE" or "information element" is used in this technical report as reference to the information element within a message.

3. The name of the type of the information element (which indicates the coding of the value part of the IE), and generally, the referenced clause of clause 9 of the present document describing the value part of the information element.

4. The presence requirement indication (M, C, or O) for the IE as defined in 3GPP TS 24.007 [12].

5. The format of the information element (T, V, TV, LV, TLV, LV-E or TLV-E) as defined in 3GPP TS 24.007 [12].

6. The length of the information element (or permissible range of lengths), in octets, in the message, where "?" means that the maximum length of the IE is only constrained by link layer protocol. This indication is non-normative.

c) clauses specifying, where appropriate, conditions for IEs with presence requirement C or O in the relevant message which together with other conditions specified in the present document define when the information elements shall be included or not, what non-presence of such IEs means, and – for IEs with presence requirement C – the static conditions for presence or non-presence of the IEs or for both cases (see 3GPP TS 24.007 [12]).

8.2 EPS mobility management messages

8.2.1 Attach accept

8.2.1.1 Message definition

This message is sent by the network to the UE to indicate that the corresponding attach request has been accepted. See table 8.2.1.1.

Message type: ATTACH ACCEPT

Significance: dual

Direction: network to UE

Table 8.2.1.1: ATTACH ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Attach accept message identity	Message type 9.8	M	V	1
	EPS attach result	EPS attach result 9.9.3.10	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
	T3412 value	GPRS timer 9.9.3.16	M	V	1
	TAI list	Tracking area identity list 9.9.3.33	M	LV	7-97
	ESM message container	ESM message container 9.9.3.15	M	LV-E	5-n
50	GUTI	EPS mobile identity 9.9.3.12	O	TLV	13
13	Location area identification	Location area identification 9.9.2.2	O	TV	6
23	MS identity	Mobile identity 9.9.2.3	O	TLV	7-10
53	EMM cause	EMM cause 9.9.3.9	O	TV	2
17	T3402 value	GPRS timer 9.9.3.16	O	TV	2
59	T3423 value	GPRS timer 9.9.3.16	O	TV	2
4A	Equivalent PLMNs	PLMN list 9.9.2.8	O	TLV	5-47
34	Emergency number list	Emergency number list 9.9.3.37	O	TLV	5-50
64	EPS network feature support	EPS network feature support 9.9.3.12A	O	TLV	3-4
F-	Additional update result	Additional update result 9.9.3.0A	O	TV	1
5E	T3412 extended value	GPRS timer 3 9.9.3.16B	O	TLV	3
6A	T3324 value	GPRS timer 2 9.9.3.16A	O	TLV	3
6E	Extended DRX parameters	Extended DRX parameters 9.9.3.46	O	TLV	3
65	DCN-ID	DCN-ID 9.9.3.48	O	TLV	4
E-	SMS services status	SMS services status 9.9.3.4B	O	TV	1
D-	Non-3GPP NW provided policies	Non-3GPP NW provided policies 9.9.3.49	O	TV	1
6B	T3448 value	GPRS timer 2 9.9.3.16A	O	TLV	3
C-	Network policy	Network policy 9.9.3.52	O	TV	1
6C	T3447 value	GPRS timer 3 9.9.3.16B	O	TLV	3
7A	Extended emergency number list	Extended emergency number list 9.9.3.37A	O	TLV-E	7-65538
7C	Ciphering key data	Ciphering key data 9.9.3.56	O	TLV-E	35-2291
66	UE radio capability ID	UE radio capability ID 9.9.3.60	O	TLV	3-n
B-	UE radio capability ID deletion indication	UE radio capability ID deletion indication 9.9.3.61	O	TV	1
35	Negotiated WUS assistance information	WUS assistance information 9.9.3.62	O	TLV	3-n
36	Negotiated DRX parameter in NB-S1 mode	NB-S1 DRX parameter 9.9.3.63	O	TLV	3
38	Negotiated IMSI offset	IMSI offset 9.9.3.64	O	TLV	4
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	8-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	8-98

8.2.1.2 GUTI

This IE may be included to assign a GUTI to the UE during attach or combined EPS/IMSI attach.

8.2.1.3 Location area identification

This IE may be included to assign a new location area identification to a UE during a combined attach.

8.2.1.4 MS identity

This IE may be included to assign or unassign a new TMSI to a UE during a combined attach.

8.2.1.5 EMM cause

This IE shall be included when IMSI attach for non-EPS services is not successful during a combined EPS/IMSI attach procedure.

8.2.1.6 T3402 value

This IE may be included to indicate a value for timer T3402.

8.2.1.7 T3423 value

This IE may be included to indicate a value for timer T3423.

If this IE is not included, the UE shall use the default value.

8.2.1.8 Equivalent PLMNs

This IE may be included in order to assign an equivalent PLMNs list to a UE.

8.2.1.9 Emergency number list

This IE may be sent by the network. If this IE is sent, the contents of this IE indicates a list of emergency numbers valid within the same country as in the PLMN from which this IE is received.

8.2.1.9A Extended emergency number list

This IE may be sent by the network. If this IE is sent, the contents of this IE indicates a list of emergency numbers (with URN information) valid within the same country as in the PLMN from which this IE is received or valid only in the PLMN from which this IE is received.

8.2.1.10 EPS network feature support

The network may include this IE to inform the UE of the support of certain features. If this IE is not included then the UE shall interpret this as a receipt of an information element with all bits of the value part coded as zero, except for the S1-u data transfer (S1-U data) (octet 4, bit 2).

NOTE: In this exceptional case, the UE deems that the network supports S1-u data transfer.

8.2.1.11 Additional update result

The network may include this IE to provide the UE with additional information about the result of:

– a combined attach procedure if the procedure was successful for EPS services and non-EPS services, or for EPS services and "SMS only"; or

– an attach procedure requested for CIoT EPS optimizations if the procedure was successful for EPS services and "SMS only".

8.2.1.12 T3412 extended value

The network may include this IE to provide the UE with longer periodic tracking area update timer.

8.2.1.13 T3324 value

The network shall include the T3324 value IE if:

– the UE included the T3324 value IE in the ATTACH REQUEST message; and

– the network supports PSM and accepts the use of PSM.

8.2.1.14 Extended DRX parameters

The network shall include the Extended DRX parameters IE if:

– the UE included the Extended DRX parameters IE in the ATTACH REQUEST message; and

– the network supports eDRX and accepts the use of eDRX.

8.2.1.15 DCN-ID

This IE is included in the message when the network wishes to provide a DCN-ID to the UE.

8.2.1.16 SMS services status

This IE may be included when a normal attach procedure for EPS services and "SMS only" was successful for EPS services only.

8.2.1.17 Non-3GPP NW provided policies

This IE is included if the network needs to indicate whether emergency numbers provided via non-3GPP access can be used to initiate UE detected emergency calls (see 3GPP TS 24.302 [48]). If this IE is not included then the UE shall interpret this as a receipt of an information element with all bits of the value part coded as zero.

8.2.1.18 T3448 value

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports timer T3448.

8.2.1.19 Network policy

This IE is included if the network needs to indicate network policy information to the UE, If this IE is not included then the UE shall interpret this as a receipt of an information element with all bits of the value part coded as zero.

8.2.1.20 T3447 value

The network may include T3447 value IE if:

– the UE has indicated support for service gap control in the ATTACH REQUEST message; and

– the EMM context contains a service gap time value.

8.2.1.21 Ciphering key data

This IE is included if the network needs to send ciphering key data to the UE for ciphered broadcast assistance data.

8.2.1.22 UE radio capability ID

This IE may be included in WB-S1 mode if both the UE and the network supports RACS and the network needs to assign a network-assigned UE radio capability ID to the UE.

8.2.1.23 UE radio capability ID deletion indication

This IE may be included in WB-S1 mode if both the UE and the network supports RACS and the network needs to trigger the UE to delete all network-assigned UE radio capability IDs stored at the UE for the serving PLMN.

8.2.1.24 Negotiated WUS assistance information

The network shall include the Negotiated WUS assistance information IE if:

– the UE supports WUS assistance;

– the MME supports and accepts the use of WUS assistance; and

– the UE is not attaching for emergency bearer services.

8.2.1.25 Negotiated DRX parameter in NB-S1 mode

The network shall include the Negotiated DRX parameter in NB-S1 mode IE if the UE has included the DRX parameter in NB-S1 mode IE in the ATTACH REQUEST message.

8.2.1.26 Negotiated IMSI offset

The network shall include the Negotiated IMSI offset IE if the network supports paging timing collision control and the MUSIM UE has included the Requested IMSI offset IE in the ATTACH REQUEST message.

8.2.1.27 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.1.28 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for regional provision of service". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.2 Attach complete

This message is sent by the UE to the network in response to an ATTACH ACCEPT message. See table 8.2.2.1.

Message type: ATTACH COMPLETE

Significance: dual

Direction: UE to network

Table 8.2.2.1: ATTACH COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Attach complete message identity	Message type 9.8	M	V	1
	ESM message container	ESM message container 9.9.3.15	M	LV-E	5-n

8.2.3 Attach reject

8.2.3.1 Message definition

This message is sent by the network to the UE to indicate that the corresponding attach request has been rejected. See table 8.2.3.1.

Message type: ATTACH REJECT

Significance: dual

Direction: network to UE

Table 8.2.3.1: ATTACH REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Attach reject message identity	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1
78	ESM message container	ESM message container 9.9.3.15	O	TLV-E	6-n
5F	T3346 value	GPRS timer 2 9.9.3.16A	O	TLV	3
16	T3402 value	GPRS timer 2 9.9.3.16A	O	TLV	3
A-	Extended EMM cause	Extended EMM cause 9.9.3.26A	O	TV	1
1C	Lower bound timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	8-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	8-98

8.2.3.2 ESM message container

This IE is included to carry a single ESM message.

8.2.3.3 T3346 value

The MME may include this IE when the NAS level mobility management congestion control is active.

8.2.3.4 T3402 value

This IE may be included to indicate a value for timer T3402.

8.2.3.5 Extended EMM cause

This IE may be included by the network to indicate additional information associated with the EMM cause.

8.2.3.5A Lower bound timer value

The MME may include this IE when the EMM cause is set to #78 "PLMN not allowed to operate at the present UE location", to provide a minimum timer value for an entry added to the list of "PLMNs not allowed to operate at the present UE location".

8.2.3.6 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.3.7 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.2.4 Attach request

8.2.4.1 Message definition

This message is sent by the UE to the network in order to perform an attach procedure. See table 8.2.4.1.

Message type: ATTACH REQUEST

Significance: dual

Direction: UE to network

Table 8.2.4.1: ATTACH REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Attach request message identity	Message type 9.8	M	V	1
	EPS attach type	EPS attach type 9.9.3.11	M	V	1/2
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
	EPS mobile identity	EPS mobile identity 9.9.3.12	M	LV	5-12
	UE network capability	UE network capability 9.9.3.34	M	LV	3-14
	ESM message container	ESM message container 9.9.3.15	M	LV-E	5-n
19	Old P-TMSI signature	P-TMSI signature 9.9.3.26	O	TV	4
50	Additional GUTI	EPS mobile identity 9.9.3.12	O	TLV	13
52	Last visited registered TAI	Tracking area identity 9.9.3.32	O	TV	6
5C	DRX parameter	DRX parameter 9.9.3.8	O	TV	3
31	MS network capability	MS network capability 9.9.3.20	O	TLV	4-10
13	Old location area identification	Location area identification 9.9.2.2	O	TV	6
9-	TMSI status	TMSI status 9.9.3.31	O	TV	1
11	Mobile station classmark 2	Mobile station classmark 2 9.9.2.4	O	TLV	5
20	Mobile station classmark 3	Mobile station classmark 3 9.9.2.5	O	TLV	2-34
40	Supported Codecs	Supported Codec List 9.9.2.10	O	TLV	5-n
F-	Additional update type	Additional update type 9.9.3.0B	O	TV	1
5D	Voice domain preference and UE’s usage setting	Voice domain preference and UE’s usage setting 9.9.3.44	O	TLV	3
D-	Device properties	Device properties 9.9.2.0A	O	TV	1
E-	Old GUTI type	GUTI type 9.9.3.45	O	TV	1
C-	MS network feature support	MS network feature support 9.9.3.20A	O	TV	1
10	TMSI based NRI container	Network resource identifier container 9.9.3.24A	O	TLV	4
6A	T3324 value	GPRS timer 2 9.9.3.16A	O	TLV	3
5E	T3412 extended value	GPRS timer 3 9.9.3.16B	O	TLV	3
6E	Extended DRX parameters	Extended DRX parameters 9.9.3.46	O	TLV	3
6F	UE additional security capability	UE additional security capability 9.9.3.53	O	TLV	6
6D	UE status	UE status 9.9.3.54	O	TLV	3
17	Additional information requested	Additional information requested 9.9.3.55	O	TV	2
32	N1 UE network capability	N1 UE network capability 9.9.3.57	O	TLV	3-15
34	UE radio capability ID availability	UE radio capability ID availability 9.9.3.58	O	TLV	3
35	Requested WUS assistance information	WUS assistance information 9.9.3.62	O	TLV	3-n
36	DRX parameter in NB-S1 mode	NB-S1 DRX parameter 9.9.3.63	O	TLV	3
38	Requested IMSI offset	IMSI offset 9.9.3.64	O	TLV	4

8.2.4.2 Old P-TMSI signature

The UE shall include this IE if the UE holds a valid P-TMSI signature, P-TMSI and RAI, and the TIN either indicates "P-TMSI" or is deleted. If the UE is configured for "AttachWithIMSI" as specified in 3GPP TS 24.368 [15A] or 3GPP TS 31.102 [17] and is attaching in a new PLMN that is neither the registered PLMN nor in the list of equivalent PLMNs, the UE shall not include this IE.

8.2.4.3 Additional GUTI

The UE shall include this IE if the TIN indicates "P-TMSI" and the UE holds a valid GUTI, P-TMSI and RAI. If the UE is configured for "AttachWithIMSI" as specified in 3GPP TS 24.368 [15A] or 3GPP TS 31.102 [17] and is attaching in a new PLMN that is neither the registered PLMN nor in the list of equivalent PLMNs, the UE shall not include this IE.

8.2.4.4 Last visited registered TAI

This IE shall be included if the UE holds a valid last visited registered TAI.

8.2.4.5 DRX parameter

This IE is included if UE supports A/Gb mode or Iu mode or if the UE wants to indicate its UE specific DRX parameters to the network.

8.2.4.6 MS network capability

A UE supporting A/Gb mode or Iu mode shall include this IE to indicate its capabilities to the network.

8.2.4.7 Old location area identification

The UE shall include this IE during a combined attach procedure if it has a valid location area identification.

8.2.4.8 TMSI status

The UE shall include this IE during combined attach procedure if it has no valid TMSI available.

8.2.4.9 Mobile station classmark 2

This IE shall be included if the UE supports SRVCC to GERAN or UTRAN or supports vSRVCC to UTRAN (see 3GPP TS 23.216 [8]), or if the UE is performing a combined attach procedure.

8.2.4.10 Mobile station classmark 3

This IE shall be included if the UE supports SRVCC to GERAN.

8.2.4.11 Supported Codecs

This IE shall be included if the UE supports SRVCC to GERAN or UTRAN or supports vSRVCC to UTRAN to indicate its supported speech codecs for CS speech calls.

8.2.4.12 Additional update type

The UE shall include this IE if the UE requests "SMS only" or CIoT EPS optimizations.

8.2.4.13 Voice domain preference and UE’s usage setting

This IE shall be included in WB-S1 mode if and only if the UE supports:

– CS fallback and SMS over SGs; or

– if the UE is configured to support IMS voice, but does not support 1xCS fallback.

8.2.4.14 Device properties

This IE shall be included if the UE is configured for NAS signalling low priority.

8.2.4.15 Old GUTI type

The UE shall include this IE if the type of identity in the EPS mobile identity IE is set to "GUTI".

8.2.4.16 MS network feature support

This IE shall be included if the UE supports extended periodic timer T3412.

8.2.4.17 TMSI based NRI container

The UE shall include this IE during a combined attach procedure if it has a valid TMSI.

8.2.4.18 T3324 value

The UE may include this IE to request the use of PSM.

8.2.4.19 T3412 extended value

The UE may include this IE to request a particular T3412 value if the T3324 value IE is included.

8.2.4.20 Extended DRX parameters

The UE may include this IE to request the use of eDRX.

8.2.4.21 UE additional security capability

The UE shall include this IE if the UE supports dual connectivity with NR or if the UE supports N1 mode.

8.2.4.22 UE status

This IE shall be included if the UE wants to provide the network with information concerning aspects of the current UE registration status which is used for interworking with 5GS.

8.2.4.23 Additional information requested

The UE shall include this IE if the UE supports ciphered broadcast assistance data and the UE needs to obtain new ciphering keys for ciphered broadcast assistance data.

8.2.4.24 N1 UE network capability

The UE shall include this IE if the UE supports N1 mode and needs to indicate the supported CIoT network behaviour for 5GCN.

8.2.4.25 UE radio capability ID availability IE

The UE shall include this IE in WB-S1 mode if the UE supports RACS and the UE has an applicable UE radio capability ID for the current UE radio configuration in the selected PLMN.

8.2.4.26 Requested WUS assistance information

The UE may include this IE if it supports WUS assistance and it is not attaching for emergency bearer services.

8.2.4.27 DRX parameter in NB-S1 mode

This IE is included if the UE intends to use the UE specific DRX parameter in NB-S1 mode.

8.2.4.28 Requested IMSI offset

The MUSIM UE may include this IE if the UE needs to indicate an IMSI offset value to the network as specified in 3GPP TS 23.401 [10] that is used for deriving the paging occasion as specified in 3GPP TS 36.304 [21].

8.2.5 Authentication failure

8.2.5.1 Message definition

This message is sent by the UE to the network to indicate that authentication of the network has failed. See table 8.2.5.1.

Message type: AUTHENTICATION FAILURE

Significance: dual

Direction: UE to network

Table 8.2.5.1: AUTHENTICATION FAILURE message content

IEI	Information element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Authentication failure message type	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1
30	Authentication failure parameter	Authentication failure parameter 9.9.3.1	O	TLV	16

8.2.5.2 Authentication failure parameter

This IE shall be sent if and only if the EMM cause was #21 "synch failure". It shall include the response to the authentication challenge from the USIM, which is made up of the AUTS parameter (see 3GPP TS 33.102 [18]).

8.2.6 Authentication reject

This message is sent by the network to the UE to indicate that the authentication procedure has failed and that the UE shall abort all activities. See table 8.2.6.1.

Message type: AUTHENTICATION REJECT

Significance: dual

Direction: network to UE

Table 8.2.6.1: AUTHENTICATION REJECT message content

IEI	Information element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Authentication reject message type	Message type 9.8	M	V	1

8.2.7 Authentication request

This message is sent by the network to the UE to initiate authentication of the UE identity. See table 8.2.7.1.

Message type: AUTHENTICATION REQUEST

Significance: dual

Direction: network to UE

Table 8.2.7.1: AUTHENTICATION REQUEST message content

IEI	Information element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Authentication request message type	Message type 9.8	M	V	1
	NAS key set identifier_ASME	NAS key set identifier 9.9.3.21	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
	Authentication parameter RAND (EPS challenge)	Authentication parameter RAND 9.9.3.3	M	V	16
	Authentication parameter AUTN (EPS challenge)	Authentication parameter AUTN 9.9.3.2	M	LV	17

8.2.8 Authentication response

This message is sent by the UE to the network to deliver a calculated authentication response to the network. See table 8.2.8.1.

Message type: AUTHENTICATION RESPONSE

Significance: dual

Direction: UE to network

Table 8.2.8.1: AUTHENTICATION RESPONSE message content

IEI	Information element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Authentication response message type	Message type 9.8	M	V	1
	Authentication response parameter	Authentication response parameter 9.9.3.4	M	LV	5-17

8.2.9 CS service notification

8.2.9.1 Message definition

This message is sent by the network when a paging request with CS call indicator was received via SGs for a UE, and a NAS signalling connection is already established for the UE. See table 8.2.9.1.

Message type: CS SERVICE NOTIFICATION

Significance: dual

Direction: network to UE

Table 8.2.9.1: CS SERVICE NOTIFICATION message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	CS service notification message identity	Message type 9.8	M	V	1
	Paging identity	Paging identity 9.9.3.25A	M	V	1
60	CLI	CLI 9.9.3.38	O	TLV	3-14
61	SS Code	SS Code 9.9.3.39	O	TV	2
62	LCS indicator	LCS indicator 9.9.3.40	O	TV	2
63	LCS client identity	LCS client identity 9.9.3.41	O	TLV	3-257

8.2.9.2 CLI

The network shall send this IE if it was received via SGs. It contains the identification of the calling line for the mobile terminating call in the CS domain, which triggered the paging via SGs.

8.2.9.3 SS Code

The network shall send this IE if it was received via SGs. It contains information on the supplementary service transaction in the CS domain, which triggered the paging via SGs.

8.2.9.4 LCS indicator

The network shall send this IE if it was received via SGs. It indicates that the paging was triggered by a terminating LCS request in the CS domain.

8.2.9.5 LCS client identity

The network shall send this IE if received via SGs. It contains information related to the requestor of the terminating LCS request in the CS domain.

8.2.9.6 Void

Void.

8.2.10 Detach accept

8.2.10.1 Detach accept (UE originating detach)

This message is sent by the network to indicate that the detach procedure has been completed. See table 8.2.10.1.1.

Message type: DETACH ACCEPT

Significance: dual

Direction: network to UE

Table 8.2.10.1.1: DETACH ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Detach accept message identity	Message type 9.8	M	V	1

8.2.10.2 Detach accept (UE terminated detach)

This message is sent by the UE to indicate that the detach procedure has been completed. See table 8.2.10.2.1.

Message type: DETACH ACCEPT

Significance: dual

Direction: UE to network

Table 8.2.10.2.1: DETACH ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Detach accept message identity	Message type 9.8	M	V	1

8.2.11 Detach request

8.2.11.1 Detach request (UE originating detach)

This message is sent by the UE to request the release of an EMM context. See table 8.2.11.1.1.

Message type: DETACH REQUEST

Significance: dual

Direction: UE to network

Table 8.2.11.1.1: DETACH REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Detach request message identity	Message type 9.8	M	V	1
	Detach type	Detach type 9.9.3.7	M	V	1/2
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
	EPS mobile identity	EPS mobile identity 9.9.3.12	M	LV	5-12

8.2.11.2 Detach request (UE terminated detach)

8.2.11.2.1 Message definition

This message is sent by the network to request the release of an EMM context. See table 8.2.11.2.1.

Message type: DETACH REQUEST

Significance: dual

Direction: network to UE

Table 8.2.11.2.1: DETACH REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Detach request message identity	Message type 9.8	M	V	1
	Detach type	Detach type 9.9.3.7	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
53	EMM cause	EMM cause 9.9.3.9	O	TV	2
1C	Lower bound timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	9-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	9-98

8.2.11.2.2 EMM cause

This information element is included if an EMM cause is provided.

8.2.11.2.3 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.11.2.4 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.2.11.2.5 Lower bound timer value

8.2.12 Downlink NAS Transport

This message is sent by the network to the UE in order to carry an SMS message in encapsulated format. See table 8.2.12.1.

Message type: DOWNLINK NAS TRANSPORT

Significance: dual

Direction: network to UE

Table 8.2.12.1: DOWNLINK NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Downlink NAS transport message identity	Message type 9.8	M	V	1
	NAS message container	NAS message container 9.9.3.22	M	LV	3-252

8.2.13 EMM information

8.2.13.1 Message definition

This message is sent by the network at any time during EMM context is established to send certain information to the UE. See table 8.2.13.1.

Message type: EMM INFORMATION

Significance: local

Direction: network to UE

Table 8.2.13.1: EMM INFORMATION message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	EMM information message identity	Message type 9.8	M	V	1
43	Full name for network	Network name 9.9.3.24	O	TLV	3-n
45	Short name for network	Network name 9.9.3.24	O	TLV	3-n
46	Local time zone	Time zone 9.9.3.29	O	TV	2
47	Universal time and local time zone	Time zone and time 9.9.3.30	O	TV	8
49	Network daylight saving time	Daylight saving time 9.9.3.6	O	TLV	3

8.2.13.2 Full name for network

This IE may be sent by the network. If this IE is sent, the contents of this IE indicate the "full length name of the network" that the network wishes the UE to associate with the MCC and MNC contained in the last visited tracking area identification.

8.2.13.3 Short name for network

This IE may be sent by the network. If this IE is sent, the contents of this IE indicate the "abbreviated name of the network" that the network wishes the UE to associate with the MCC and MNC contained in the last visited tracking area identification.

8.2.13.4 Local time zone

This IE may be sent by the network. The UE should assume that this time zone applies to the tracking area of the current cell, and also applies to the tracking area list if available in the UE.

NOTE: The time information can be inaccurate, especially when the TAI list includes tracking areas belonging to different time zones.

If the local time zone has been adjusted for daylight saving time, the network shall indicate this by including the Network daylight saving time IE.

8.2.13.5 Universal time and local time zone

This IE may be sent by the network. The UE should assume that this time zone applies to the tracking area the UE is currently in, and also applies to the tracking area list if available in the UE. The UE shall not assume that the time information is accurate.

NOTE: The time information can be inaccurate, especially when the TAI list includes tracking areas belonging to different time zones.

If the local time zone has been adjusted for daylight saving time, the network shall indicate this by including the Network daylight saving time IE.

8.2.13.6 Network daylight saving time

This IE may be sent by the network. If this IE is sent, the contents of this IE indicates the value that has been used to adjust the local time zone.

8.2.14 EMM status

This message is sent by the UE or by the network at any time to report certain error conditions listed in clause 7. See table 8.2.14.1.

Message type: EMM STATUS

Significance: local

Direction: both

Table 8.2.14.1: EMM STATUS message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	EMM status message identity	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1

8.2.15 Extended service request

8.2.15.1 Message definition

This message is sent by the UE to the network

– to initiate a CS fallback or 1xCS fallback call or respond to a mobile terminated CS fallback or 1xCS fallback request from the network; or

– to request the establishment of a NAS signalling connection and of the radio and S1 bearers for packet services, if the UE needs to provide additional information that cannot be provided via a SERVICE REQUEST message.

See table 8.2.15.1.

Message type: EXTENDED SERVICE REQUEST

Significance: dual

Direction: UE to network

Table 8.2.15.1: EXTENDED SERVICE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Extended service request message identity	Message type 9.8	M	V	1
	Service type	Service type 9.9.3.27	M	V	1/2
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
	M-TMSI	Mobile identity 9.9.2.3	M	LV	6
B-	CSFB response	CSFB response 9.9.3.5	C	TV	1
57	EPS bearer context status	EPS bearer context status 9.9.2.1	O	TLV	4
D-	Device properties	Device properties 9.9.2.0A	O	TV	1
29	UE request type	UE request type 9.9.3.65	O	TLV	3
28	Paging restriction	Paging restriction 9.9.3.66	O	TLV	3-5

8.2.15.2 CSFB response

The UE shall include this IE only if the Service type information element indicates "mobile terminating CS fallback or 1xCS fallback".

NOTE: The UE does not include this IE for mobile terminating 1xCS fallback.

8.2.15.3 EPS bearer context status

This IE shall be included if the UE wants to indicate the EPS bearer contexts that are active within the UE.

8.2.15.4 Device properties

The UE shall include this IE if the UE is configured for NAS signalling low priority.

8.2.15.5 UE request type

The UE shall include this IE if the MUSIM UE requests the release of the NAS signalling connection or rejects the paging request from the network.

8.2.15.6 Paging restriction

The UE shall include this IE if the Request type is set to "NAS signalling connection release" or to "Rejection of paging" in the UE request type IE and the UE requests the network to restrict paging.

8.2.16 GUTI reallocation command

8.2.16.1 Message definition

This message is sent by the network to the UE to reallocate a GUTI and optionally to provide a new TAI list or a new DCN-ID or both. See table 8.2.16.1.

Message type: GUTI REALLOCATION COMMAND

Significance: dual

Direction: network to UE

Table 8.2.16.1: GUTI REALLOCATION COMMAND message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	GUTI reallocation command message identity	Message type 9.8	M	V	1
	GUTI	EPS mobile identity 9.9.3.12	M	LV	12
54	TAI list	Tracking area identity list 9.9.3.33	O	TLV	8-98
65	DCN-ID	DCN-ID 9.9.3.48	O	TLV	4
66	UE radio capability ID	UE radio capability ID 9.9.3.60	O	TLV	3-n
B-	UE radio capability ID deletion indication	UE radio capability ID deletion indication 9.9.3.61	O	TV	1

8.2.16.2 TAI list

This IE may be included to assign a TAI list to the UE.

8.2.16.3 DCN-ID

This IE may be included to assign a new DCN-ID to the UE.

8.2.16.4 UE radio capability ID

This IE may be included in WB-S1 mode if both the UE and the network support RACS and the network needs to assign a network-assigned UE radio capability ID to the UE.

8.2.16.5 UE radio capability ID deletion indication

This IE may be included in WB-S1 mode if both the UE and the network support RACS and the network needs to trigger the UE to delete all network-assigned UE radio capability IDs stored at the UE for the serving PLMN.

8.2.17 GUTI reallocation complete

This message is sent by the UE to the network to indicate that reallocation of a GUTI has taken place. See table 8.2.17.1.

Message type: GUTI REALLOCATION COMPLETE

Significance: dual

Direction: UE to network

Table 8.2.17.1: GUTI REALLOCATION COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	GUTI reallocation complete message identity	Message type 9.8	M	V	1

8.2.18 Identity request

This message is sent by the network to the UE to request the UE to provide the specified identity. See table 8.2.18.1.

Message type: IDENTITY REQUEST

Significance: dual

Direction: network to UE

Table 8.2.18.1: IDENTITY REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Identity request message identity	Message type 9.8	M	V	1
	Identity type	Identity type 2 9.9.3.17	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2

8.2.19 Identity response

This message is sent by the UE to the network in response to an IDENTITY REQUEST message and provides the requested identity. See table 8.2.19.1.

Message type: IDENTITY RESPONSE

Significance: dual

Direction: UE to network

Table 8.2.19.1: IDENTITY RESPONSE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Identity response message	Message type 9.8	M	V	1
	Mobile identity	Mobile identity 9.9.2.3	M	LV	4-10

8.2.20 Security mode command

8.2.20.1 Message definition

This message is sent by the network to the UE to establish NAS signalling security. See table 8.2.20.1.

Message type: SECURITY MODE COMMAND

Significance: dual

Direction: network to UE

Table 8.2.20.1: SECURITY MODE COMMAND message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Security mode command message identity	Message type 9.8	M	V	1
	Selected NAS security algorithms	NAS security algorithms 9.9.3.23	M	V	1
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
	Replayed UE security capabilities	UE security capability 9.9.3.36	M	LV	3-6
C-	IMEISV request	IMEISV request 9.9.3.18	O	TV	1
55	Replayed nonce_UE	Nonce 9.9.3.25	O	TV	5
56	Nonce_MME	Nonce 9.9.3.25	O	TV	5
4F	Hash_MME	Hash_MME 9.9.3.50	O	TLV	10
6F	Replayed UE additional security capability	UE additional security capability 9.9.3.53	O	TLV	6
37	UE radio capability ID request	UE radio capability ID request 9.9.3.59	O	TLV	3

8.2.20.2 IMEISV request

The MME may include this information element to request the UE to send its IMEISV with the corresponding SECURITY MODE COMPLETE message.

8.2.20.3 Replayed nonce_UE

The MME may include this information element to indicate to the UE to use the replayed nonce_UE.

8.2.20.4 Nonce_MME

The MME may include this information element to indicate to the UE to use the nonce_MME.

8.2.20.5 Hash_MME

The MME shall include this information element when the MME is initiating a SECURITY MODE COMMAND during an attach or tracking area updating procedure and the ATTACH REQUEST or TRACKING AREA UPDATE REQUEST message was received without integrity protection or did not successfully pass the integrity check at the MME.

8.2.20.6 Replayed UE additional security capability

The MME shall include this IE if the MME supports handling of UE additional security capabilities, the MME is initiating a SECURITY MODE COMMAND during an attach or tracking area updating procedure and the ATTACH REQUEST or TRACKING AREA UPDATE REQUEST message included a UE additional security capability IE.

8.2.20.7 UE radio capability ID request

The MME may include this information element in WB-S1 mode to request the UE to send its UE radio capability ID with the corresponding SECURITY MODE COMPLETE message.

8.2.21 Security mode complete

8.2.21.1 Message definition

This message is sent by the UE to the network in response to a SECURITY MODE COMMAND message. See table 8.2.21.1.

Message type: SECURITY MODE COMPLETE

Significance: dual

Direction: UE to network

Table 8.2.21.1: SECURITY MODE COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Security mode complete message identity	Message type 9.8	M	V	1
23	IMEISV	Mobile identity 9.9.2.3	O	TLV	11
79	Replayed NAS message container	Replayed NAS message container 9.9.3.51	O	TLV-E	3-n
66	UE radio capability ID	UE radio capability ID 9.9.3.60	O	TLV	3-n

8.2.21.2 IMEISV

The UE shall include this information element, if the IMEISV was requested within the corresponding SECURITY MODE COMMAND message.

8.2.21.3 Replayed NAS message container

The UE shall include this information element, if during an ongoing attach or tracking area updating procedure, the MME included HASH_MMEin the SECURITY MODE COMMAND message and HASH_MME has a different value from the hash value locally calculated at the UE as described in 3GPP TS 33.401 [19].

8.2.21.4 UE radio capability ID

The UE shall include this information element in WB-S1 mode if the UE radio capability ID was requested within the corresponding SECURITY MODE COMMAND message.

8.2.22 Security mode reject

This message is sent by the UE to the network to indicate that the corresponding security mode command has been rejected. See table 8.2.22.1.

Message type: SECURITY MODE REJECT

Significance: dual

Direction: UE to network

Table 8.2.22.1: SECURITY MODE REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Security mode reject message identity	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1

8.2.23 Security protected NAS message

This message is sent by the UE or the network to transfer a NAS message together with the sequence number and the message authentication code protecting the message. See table 8.2.23.1.

Message type: SECURITY PROTECTED NAS MESSAGE

Significance: dual

Direction: both

Table 8.2.23.1: SECURITY PROTECTED NAS MESSAGE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Message authentication code	Message authentication code 9.5	M	V	4
	Sequence number	Sequence number 9.6	M	V	1
	NAS message	NAS message 9.7	M	V	1-n

8.2.24 Service reject

8.2.24.1 Message definition

This message is sent by the network to the UE in order to reject the service request procedure. See table 8.2.24.1.

Message type: SERVICE REJECT

Significance: dual

Direction: network to UE

Table 8.2.24.1: SERVICE REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Service reject message identity	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1
5B	T3442 value	GPRS timer 9.9.3.16	C	TV	2
5F	T3346 value	GPRS timer 2 9.9.3.16A	O	TLV	3
6B	T3448 value	GPRS timer 2 9.9.3.16A	O	TLV	3
1C	Lower bound timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	9-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	9-98

8.2.24.2 T3442 value

The MME shall include this IE when the EMM cause value is #39 "CS service temporarily not available".

8.2.24.3 T3346 value

The MME may include this IE when the general NAS level mobility management congestion control is active.

8.2.24.4 T3448 value

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports timer T3448.

8.2.24.5 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.24.6 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.2.24.7 Lower bound timer value

8.2.25 Service request

This message is sent by the UE to the network to request the establishment of a NAS signalling connection and of the radio and S1 bearers. Its structure does not follow the structure of a standard layer 3 message. See table 8.2.25.1.

Message type: SERVICE REQUEST

Significance: dual

Direction: UE to network

Table 8.2.25.1: SERVICE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	KSI and sequence number	KSI and sequence number 9.9.3.19	M	V	1
	Message authentication code (short)	Short MAC 9.9.3.28	M	V	2

8.2.26 Tracking area update accept

8.2.26.1 Message definition

This message is sent by the network to the UE to provide the UE with EPS mobility management related data in response to a tracking area update request message. See table 8.2.26.1.

Message type: TRACKING AREA UPDATE ACCEPT

Significance: dual

Direction: network to UE

Table 8.2.26.1: TRACKING AREA UPDATE ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Tracking area update accept message identity	Message type 9.8	M	V	1
	EPS update result	EPS update result 9.9.3.13	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
5A	T3412 value	GPRS timer 9.9.3.16	O	TV	2
50	GUTI	EPS mobile identity 9.9.3.12	O	TLV	13
54	TAI list	Tracking area identity list 9.9.3.33	O	TLV	8-98
57	EPS bearer context status	EPS bearer context status 9.9.2.1	O	TLV	4
13	Location area identification	Location area identification 9.9.2.2	O	TV	6
23	MS identity	Mobile identity 9.9.2.3	O	TLV	7-10
53	EMM cause	EMM cause 9.9.3.9	O	TV	2
17	T3402 value	GPRS timer 9.9.3.16	O	TV	2
59	T3423 value	GPRS timer 9.9.3.16	O	TV	2
4A	Equivalent PLMNs	PLMN list 9.9.2.8	O	TLV	5-47
34	Emergency number list	Emergency number list 9.9.3.37	O	TLV	5-50
64	EPS network feature support	EPS network feature support 9.9.3.12A	O	TLV	3-4
F-	Additional update result	Additional update result 9.9.3.0A	O	TV	1
5E	T3412 extended value	GPRS timer 3 9.9.3.16B	O	TLV	3
6A	T3324 value	GPRS timer 2 9.9.3.16A	O	TLV	3
6E	Extended DRX parameters	Extended DRX parameters 9.9.3.46	O	TLV	3
68	Header compression configuration status	Header compression configuration status 9.9.4.27	O	TLV	4
65	DCN-ID	DCN-ID 9.9.3.48	O	TLV	4
E-	SMS services status	SMS services status 9.9.3.4B	O	TV	1
D-	Non-3GPP NW policies	Non-3GPP NW provided policies 9.9.3.49	O	TV	1
6B	T3448 value	GPRS timer 2 9.9.3.16A	O	TLV	3
C-	Network policy	Network policy 9.9.3.52	O	TV	1
6C	T3447 value	GPRS timer 3 9.9.3.16B	O	TLV	3
7A	Extended emergency number list	Extended emergency number list 9.9.3.37A	O	TLV-E	7-65538
7C	Ciphering key data	Ciphering key data 9.9.3.56	O	TLV-E	35-2291
66	UE radio capability ID	UE radio capability ID 9.9.3.60	O	TLV	3-n
B-	UE radio capability ID deletion indication	UE radio capability ID deletion indication 9.9.3.61	O	TV	1
35	Negotiated WUS assistance information	WUS assistance information 9.9.3.62	O	TLV	3-n
36	Negotiated DRX parameter in NB-S1 mode	NB-S1 DRX parameter 9.9.3.63	O	TLV	3
38	Negotiated IMSI offset	IMSI offset 9.9.3.64	O	TLV	4
37	EPS additional request result	EPS additional request result 9.9.3.67	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	8-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service "	Tracking area identity list 9.9.3.33	O	TLV	8-98

8.2.26.2 T3412 value

The MME shall include this IE during normal and combined tracking area updating procedure, and may include this IE during periodic tracking area updating procedure.

The MME shall include this IE if it includes the T3412 extended value IE.

8.2.26.3 GUTI

This IE may be included to assign a GUTI to a UE.

8.2.26.4 TAI list

This IE may be included to assign a TAI list to a UE.

8.2.26.5 EPS bearer context status

This IE shall be included if the network wants to indicate the EPS bearer contexts that are active for the UE in the network.

8.2.26.6 Location area identification

This IE may be included to assign a new location area identification to a UE during a combined TA/LA update.

8.2.26.7 MS identity

This IE may be included to assign or unassign a new TMSI to a UE during a combined TA/LA update.

8.2.26.8 EMM cause

This IE shall be included if the combined tracking area updating procedure was successful for EPS services only.

8.2.26.9 T3402 value

This IE may be included to indicate a value for timer T3402.

8.2.26.10 T3423 value

This IE may be included to indicate a value for timer T3423.

If this IE is not included, the UE shall use the default value.

8.2.26.11 Equivalent PLMNs

This IE may be included in order to assign an equivalent PLMNs list to a UE.

8.2.26.12 Emergency number list

This IE may be sent by the network. If this IE is sent, the contents of this IE indicates a list of emergency numbers valid within the same country as in the PLMN from which this IE is received.

8.2.26.12A Extended emergency number list

8.2.26.13 EPS network feature support

NOTE: In this exceptional case, the UE deems that the network supports S1-u data transfer.

8.2.26.14 Additional update result

The network may include this IE to provide the UE with additional information about the result of:

– a combined tracking area updating procedure if the procedure was successful for EPS services and non-EPS services, or for EPS services and "SMS only"; or

– a normal tracking area updating procedure requested for CIoT EPS optimizations if the procedure was successful for EPS services and "SMS only".

8.2.26.15 T3412 extended value

The network may include this IE to provide the UE with a longer periodic tracking area update timer.

8.2.26.16 T3324 value

The network shall include the T3324 value IE if:

– the UE included the T3324 value IE in the TRACKING AREA UPDATE REQUEST message; and

– the network supports PSM and accepts the use of PSM.

8.2.26.17 Extended DRX parameters

The network shall include the Extended DRX parameters IE if:

– the UE included the Extended DRX parameters IE in the TRACKING AREA UPDATE REQUEST message; and

– the network supports eDRX and accepts the use of eDRX.

8.2.26.18 DCN-ID

This IE is included in the message when the network wishes to provide a DCN-ID to the UE.

8.2.26.19 SMS services status

This IE may be included when a normal tracking area updating procedure for EPS services and "SMS only" was successful for EPS services only.

8.2.26.20 Non-3GPP NW provided policies

8.2.26.21 T3448 value

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports timer T3448.

8.2.26.22 Network policy

This IE is included if the network needs to indicate network policy information to the UE. If this IE is not included, then the UE shall interpret this as a receipt of an information element with all bits of the value part coded as zero.

8.2.26.23 T3447 value

The network may include T3447 value IE if:

– the UE has indicated support for service gap control in the TRACKING AREA UPDATE REQUEST messages; and

– the EMM context contains a service gap time value.

8.2.26.24 Ciphering key data

This IE is included if the network needs to send ciphering key data to the UE for ciphered broadcast assistance data.

8.2.26.25 UE radio capability ID

This IE may be included in WB-S1 mode if both the UE and the network supports RACS and the network needs to assign a network-assigned UE radio capability ID to the UE.

8.2.26.26 UE radio capability ID deletion indication

8.2.26.27 Negotiated WUS assistance information

The network shall include the Negotiated WUS assistance information IE if:

– the UE supports WUS assistance;

– the MME supports and accepts the use of WUS assistance; and

– the UE is not attaching for emergency bearer services.

8.2.26.28 Negotiated DRX parameter in NB-S1 mode

The network shall include the Negotiated DRX parameter in NB-S1 mode IE if the UE has included the DRX parameter in NB-S1 mode IE in the TRACKING AREA UPDATE REQUEST message.

8.2.26.29 Negotiated IMSI offset

The network shall include the Negotiated IMSI offset IE if the network supports paging timing collision control and the MUSIM UE has included the Requested IMSI offset IE in the TRACKING AREA UPDATE REQUEST message.

8.2.26.30 EPS additional request result

The network may include this IE to inform the UE about the result of additional request.

8.2.26.31 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.26.32 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.2.27 Tracking area update complete

This message shall be sent by the UE to the network in response to a tracking area update accept message if a GUTI has been changed or a new TMSI has been assigned. See table 8.2.27.1.

Message type: TRACKING AREA UPDATE COMPLETE

Significance: dual

Direction: UE to network

Table 8.2.27.1: TRACKING AREA UPDATE COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Tracking area update complete message identity	Message type 9.8	M	V	1

8.2.28 Tracking area update reject

8.2.28.1 Message definition

This message is sent by the network to the UE in order to reject the tracking area updating procedure. See table 8.2.28.1.

Message type: TRACKING AREA UPDATE REJECT

Significance: dual

Direction: network to UE

Table 8.2.28.1: TRACKING AREA UPDATE REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Tracking area update reject message identity	Message type 9.8	M	V	1
	EMM cause	EMM cause 9.9.3.9	M	V	1
5F	T3346 value	GPRS timer 2 9.9.3.16A	O	TLV	3
A-	Extended EMM cause	Extended EMM cause 9.9.3.26A	O	TV	1
1C	Lower bound timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	9-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	9-98

8.2.28.2 T3346 value

The MME may include this IE when the general NAS level mobility management congestion control is active.

8.2.28.3 Extended EMM cause

This IE may be included by the network to indicate additional information associated with the EMM cause.

8.2.28.4 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.28.5 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.2.28.6 Lower bound timer value

8.2.29 Tracking area update request

8.2.29.1 Message definition

The purposes of sending the tracking area update request by the UE to the network are described in clause 5.5.3.1. See table 8.2.29.1.

Message type: TRACKING AREA UPDATE REQUEST

Significance: dual

Direction: UE to network

Table 8.2.29.1: TRACKING AREA UPDATE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Tracking area update request message identity	Message type 9.8	M	V	1
	EPS update type	EPS update type 9.9.3.14	M	V	1/2
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
	Old GUTI	EPS mobile identity 9.9.3.12	M	LV	12
B-	Non-current native NAS key set identifier	NAS key set identifier 9.9.3.21	O	TV	1
8-	GPRS ciphering key sequence number	Ciphering key sequence number 9.9.3.4a	O	TV	1
19	Old P-TMSI signature	P-TMSI signature 9.9.3.26	O	TV	4
50	Additional GUTI	EPS mobile identity 9.9.3.12	O	TLV	13
55	Nonce_UE	Nonce 9.9.3.25	O	TV	5
58	UE network capability	UE network capability 9.9.3.34	O	TLV	4-15
52	Last visited registered TAI	Tracking area identity 9.9.3.32	O	TV	6
5C	DRX parameter	DRX parameter 9.9.3.8	O	TV	3
A-	UE radio capability information update needed	UE radio capability information update needed 9.9.3.35	O	TV	1
57	EPS bearer context status	EPS bearer context status 9.9.2.1	O	TLV	4
31	MS network capability	MS network capability 9.9.3.20	O	TLV	4-10
13	Old location area identification	Location area identification 9.9.2.2	O	TV	6
9-	TMSI status	TMSI status 9.9.3.31	O	TV	1
11	Mobile station classmark 2	Mobile station classmark 2 9.9.2.4	O	TLV	5
20	Mobile station classmark 3	Mobile station classmark 3 9.9.2.5	O	TLV	2-34
40	Supported Codecs	Supported Codec List 9.9.2.10	O	TLV	5-n
F-	Additional update type	Additional update type 9.9.3.0B	O	TV	1
5D	Voice domain preference and UE’s usage setting	Voice domain preference and UE’s usage setting 9.9.3.44	O	TLV	3
E-	Old GUTI type	GUTI type 9.9.3.45	O	TV	1
D-	Device properties	Device properties 9.9.2.0A	O	TV	1
C-	MS network feature support	MS network feature support 9.9.3.20A	O	TV	1
10	TMSI based NRI container	Network resource identifier container 9.9.3.24A	O	TLV	4
6A	T3324 value	GPRS timer 2 9.9.3.16	O	TLV	3
5E	T3412 extended value	GPRS timer 3 9.9.3.16B	O	TLV	3
6E	Extended DRX parameters	Extended DRX parameters 9.9.3.46	O	TLV	3
6F	UE additional security capability	UE additional security capability 9.9.3.53	O	TLV	6
6D	UE status	UE status 9.9.3.54	O	TLV	3
17	Additional information requested	Additional information requested 9.9.3.55	O	TV	2
32	N1 UE network capability	N1 UE network capability 9.9.3.57	O	TLV	3-15
34	UE radio capability ID availability	UE radio capability ID availability 9.9.3.58	O	TLV	3
35	Requested WUS assistance information	WUS assistance information 9.9.3.62	O	TLV	3-n
36	DRX parameter in NB-S1 mode	NB-S1 DRX parameter 9.9.3.63	O	TLV	3
38	Requested IMSI offset	IMSI offset 9.9.3.64	O	TLV	4
29	UE request type	UE request type 9.9.3.65	O	TLV	3
28	Paging restriction	Paging restriction 9.9.3.66	O	TLV	3-5

8.2.29.2 Non-current native NAS key set identifier

The UE shall include this IE if the UE has a valid non-current native EPS security context when the UE performs an A/Gb mode or Iu mode or N1 mode to S1 mode inter-system change in EMM-CONNECTED mode and the UE uses a mapped EPS security context to protect the TRACKING AREA UPDATE REQUEST message.

8.2.29.3 GPRS ciphering key sequence number

The UE shall include this IE if the UE performs an A/Gb mode or Iu mode to S1 mode inter-system change in EMM-IDLE mode and the TIN indicates "P-TMSI".

8.2.29.4 Old P-TMSI signature

The UE shall include this IE if the TIN indicates "P-TMSI" and the UE holds a valid P-TMSI signature, P-TMSI and RAI.

8.2.29.5 Additional GUTI

The UE shall include this IE:

a) if the TIN indicates "P-TMSI" and the UE holds a valid GUTI, P-TMSI and RAI; or

b) if the UE performs an N1 mode to S1 mode inter-system change and the UE holds a valid GUTI.

8.2.29.6 Nonce_UE

This IE is included if the UE performs an A/Gb mode or Iu mode to S1 mode inter-system change in idle mode and the TIN is set to "P-TMSI".

8.2.29.7 UE network capability

The UE shall include this IE, unless the UE performs a periodic tracking area updating procedure.

8.2.29.8 Last visited registered TAI

This IE shall be included if the UE holds a valid last visited registered TAI.

8.2.29.9 DRX parameter

This IE is included by the UE to indicate a change of UE specific DRX parameters to the network.

8.2.29.10 UE radio capability information update needed

The UE shall include this IE if the UE radio capability information in the network needs to be updated.

8.2.29.11 EPS bearer context status

This IE shall be included if the UE wants to indicate the EPS bearer contexts that are active within the UE.

8.2.29.12 MS network capability

A UE supporting A/Gb mode or Iu mode shall include this IE, unless the UE performs a periodic tracking area updating procedure.

8.2.29.13 Old location area identification

The UE shall include this IE during a combined tracking area updating procedure if it has a valid location area identification.

8.2.29.14 TMSI status

The UE shall include this IE during a combined tracking area updating procedure if it has no valid TMSI available.

8.2.29.15 Mobile station classmark 2

This IE shall be included if the UE supports SRVCC to GERAN or UTRAN or supports vSRVCC to UTRAN (see 3GPP TS 23.216 [8]), or if the UE is performing a combined tracking area updating procedure.

8.2.29.16 Mobile station classmark 3

This IE shall be included if the UE supports SRVCC to GERAN.

8.2.29.17 Supported Codecs

This IE shall be included if the UE supports SRVCC to GERAN or UTRAN or supports vSRVCC to UTRAN to indicate its supported speech codecs for CS speech calls.

8.2.29.18 Additional update type

The UE shall include this IE if the UE requests "SMS only" or CIoT EPS optimizations, unless the UE performs a periodic tracking area updating procedure.

8.2.29.19 Voice domain preference and UE’s usage setting

This IE shall be included in WB-S1 mode if and only if the UE supports:

– CS fallback and SMS over SGs; or

– if the UE is configured to support IMS voice, but does not support 1xCS fallback.

8.2.29.20 Old GUTI type

The UE shall include this IE.

8.2.29.21 Device properties

This IE shall be included if the UE is configured for NAS signalling low priority.

8.2.29.22 MS network feature support

This IE shall be included if the UE supports extended periodic timer T3412.

8.2.29.23 TMSI based NRI container

The UE shall include this IE if it has a valid TMSI.

8.2.29.24 T3324 value

The UE may include this IE to request the use of PSM.

8.2.29.25 T3412 extended value

The UE may include this IE to request a particular T3412 value if the T3324 value IE is included.

8.2.29.26 Extended DRX parameters

The UE may include this IE to request the use of eDRX.

8.2.29.27 UE additional security capability

The UE shall include this IE if the UE supports dual connectivity with NR or if the UE supports N1 mode.

8.2.29.28 UE status

This IE shall be included if the UE wants to provide the network with information concerning aspects of the current UE registration status which is used for interworking with 5GS.

8.2.29.29 Additional information requested

The UE shall include this IE if the UE supports ciphered broadcast assistance data and the UE needs to obtain new ciphering keys for ciphered broadcast assistance data.

8.2.29.30 N1 UE network capability

The UE shall include this IE if the UE supports N1 mode and needs to indicate the supported CIoT network behaviour for 5GCN, unless the UE performs a periodic tracking area updating procedure.

8.2.29.31 UE radio capability ID availability IE

The UE may include this IE in WB-S1 mode if the UE supports RACS and the UE has an applicable UE radio capability ID for the current UE radio configuration in the selected PLMN.

8.2.29.32 DRX parameter in NB-S1 mode

This IE is included if the UE intends to use or change the UE specific DRX parameter in NB-S1 mode, except when the UE performs a periodic tracking area updating procedure.

8.2.29.33 Requested WUS assistance information

The UE may include this IE if it supports WUS assistance and it is not attaching for emergency bearer services.

8.2.29.34 Requested IMSI offset

8.2.29.35 UE request type

The UE shall include this IE if the MUSIM UE requests the release of the NAS signalling connection.

8.2.29.36 Paging restriction

The UE shall include this IE if the Request type is set to "NAS signalling connection release" in the UE request type IE and the UE requests the network to restrict paging.

8.2.30 Uplink NAS Transport

This message is sent by the UE to the network in order to carry an SMS message in encapsulated format. See table 8.2.30.1.

Message type: UPLINK NAS TRANSPORT

Significance: dual

Direction: UE to network

Table 8.2.30.1: UPLINK NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Uplink NAS transport message identity	Message type 9.8	M	V	1
	NAS message container	NAS message container 9.9.3.22	M	LV	3-252

8.2.31 Downlink generic NAS transport

8.2.31.1 Message definition

This message is sent by the network to the UE in order to carry an application message in encapsulated format. See table 8.2.31.1.

Message type: DOWNLINK GENERIC NAS TRANSPORT

Significance: dual

Direction: network to UE

Table 8.2.31.1: DOWNLINK GENERIC NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Downlink generic NAS transport message identity	Message type 9.8	M	V	1
	Generic message container type	Generic message container type 9.9.3.42	M	V	1
	Generic message container	Generic message container 9.9.3.43	M	LV-E	3-n
65	Additional information	Additional information 9.9.2.0	O	TLV	3-n

8.2.31.2 Additional information

The MME may include this information element if the application wants to send any additional information.

8.2.32 Uplink generic NAS transport

8.2.32.1 Message definition

This message is sent by the UE to the network in order to carry an application protocol message in encapsulated format. See table 8.2.32.1.

Message type: UPLINK GENERIC NAS TRANSPORT

Significance: dual

Direction: UE to network

Table 8.2.32.1: UPLINK GENERIC NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Uplink generic NAS transport message identity	Message type 9.8	M	V	1
	Generic message container type	Generic message container type 9.9.3.42	M	V	1
	Generic message container	Generic message container 9.9.3.43	M	LV-E	3-n
65	Additional information	Additional information 9.9.2.0	O	TLV	3-n

8.2.32.2 Additional information

The UE may include this information element if the application wants to send any additional information.

8.2.33 CONTROL PLANE SERVICE REQUEST

8.2.33.1 Message definition

This message is sent by the UE to the network when the UE is using EPS services with control plane CIoT EPS optimization. See table 8.2.33.1.

Message type: CONTROL PLANE SERVICE REQUEST

Significance: dual

Direction: UE to network

Table 8.2.33.1: CONTROL PLANE SERVICE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Control plane service request message identity	Message type 9.8	M	V	1
	Control plane service type	Control plane service type 9.9.3.47	M	V	1/2
	NAS key set identifier	NAS key set identifier 9.9.3.21	M	V	1/2
78	ESM message container	ESM message container 9.9.3.15	O	TLV-E	3-n
67	NAS message container	NAS message container 9.9.3.22	O	TLV	4-253
57	EPS bearer context status	EPS bearer context status 9.9.2.1	O	TLV	4
D-	Device properties	Device properties 9.9.2.0A	O	TV	1
29	UE request type	UE request type 9.9.3.65	O	TLV	3
28	Paging restriction	Paging restriction 9.9.3.66	O	TLV	3-5

8.2.33.2 ESM message container

The UE shall include this IE, if it wants to send an ESM message to the network.

8.2.33.3 NAS message container

The UE shall include this IE, if it is in EMM-IDLE mode and has pending SMS messages to be sent.

8.2.33.4 EPS bearer context status

The UE shall include this IE, if it wants to indicate the EPS bearer contexts that are active within the UE.

8.2.33.5 Device properties

The UE shall include this IE if the UE is configured for NAS signalling low priority.

8.2.33.6 UE request type

The UE shall include this IE if the MUSIM UE requests the release of the NAS signalling connection or rejects the paging request from the network.

8.2.33.7 Paging restriction

8.2.34 Service Accept

8.2.34.1 Message definition

This message is sent by the network in response to the SERVICE REQUEST message, the EXTENDED SERVICE REQUEST message or the CONTROL PLANE SERVICE REQUEST message. See table 8.2.34.1.

Message type: SERVICE ACCEPT

Significance: dual

Direction: network to UE

Table 8.2.34.1: SERVICE ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	Security header type	Security header type 9.3.1	M	V	1/2
	Service accept message identity	Message type 9.8	M	V	1
57	EPS bearer context status	EPS bearer context status 9.9.2.1	O	TLV	4
6B	T3448 value	GPRS timer 2 9.9.3.16A	O	TLV	3
37	EPS additional request result	EPS additional request result 9.9.3.67	O	TLV	3
1D	Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"	Tracking area identity list 9.9.3.33	O	TLV	8-98
1E	Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"	Tracking area identity list 9.9.3.33	O	TLV	8-98

8.2.34.2 EPS bearer context status

This IE shall be included if the network wants to indicate the EPS bearer contexts that are active for the UE in the network.

8.2.34.3 T3448 value

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports timer T3448.

8.2.34.4 EPS additional request result

The network may include this IE to inform the UE about the result of additional request.

8.2.34.5 Forbidden TAI(s) for the list of "forbidden tracking areas for roaming"

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite E-UTRAN access.

8.2.34.6 Forbidden TAI(s) for the list of "forbidden tracking areas for regional provision of service"

8.3 EPS session management messages

8.3.1 Activate dedicated EPS bearer context accept

8.3.1.1 Message definition

This message is sent by the UE to the network to acknowledge activation of a dedicated EPS bearer context associated with the same PDN address(es) and APN as an already active EPS bearer context. See table 8.3.1.1.

Message type: ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT

Significance: dual

Direction: UE to network

Table 8.3.1.1: ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT message content

IEI

Information Element

Type/Reference

Presence

Format

Length

Protocol discriminator

9.2

1/2

EPS bearer identity

9.3.2

1/2

Procedure transaction identity

9.4

Activate dedicated EPS bearer context accept message identity

Message type

9.8

Protocol configuration options

9.9.4.11

TLV

3-253

NBIFOM container

9.9.4.19

TLV

3-257

Extended protocol configuration options

9.9.4.26

TLV-E

4-65538

8.3.1.2 Protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is not supported by the UE or the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.1.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.1.4 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.2 Activate dedicated EPS bearer context reject

8.3.2.1 Message definition

This message is sent by UE to the network to reject activation of a dedicated EPS bearer context. See table 8.3.2.1.

Message type: ACTIVATE DEDICATED EPS BEARER CONTEXT REJECT

Significance: dual

Direction: UE to network

Table 8.3.2.1: ACTIVATE DEDICATED EPS BEARER CONTEXT REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Activate dedicated EPS bearer context reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.2.2 Protocol configuration options

8.3.2.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.2.4 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.3 Activate dedicated EPS bearer context request

8.3.3.1 Message definition

This message is sent by the network to the UE to request activation of a dedicated EPS bearer context associated with the same PDN address(es) and APN as an already active default EPS bearer context. See table 8.3.3.1.

Message type: ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST

Significance: dual

Direction: network to UE

Table 8.3.3.1: ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST message content

IEI

Information Element

Type/Reference

Presence

Format

Length

Protocol discriminator

9.2

1/2

EPS bearer identity

9.3.2

1/2

Procedure transaction identity

9.4

Activate dedicated EPS bearer context request message identity

Message type

9.8

Linked EPS bearer identity

9.9.4.6

1/2

Spare half octet

9.9.2.9

1/2

EPS QoS

EPS quality of service

9.9.4.3

2-14

TFT

Traffic flow template

9.9.4.16

2-256

Transaction identifier

9.9.4.17

TLV

3-4

Negotiated QoS

Quality of service

9.9.4.12

TLV

14-22

Negotiated LLC SAPI

LLC service access point identifier

9.9.4.7

Radio priority

9.9.4.13

Packet flow Identifier

9.9.4.8

TLV

Protocol configuration options

9.9.4.11

TLV

3-253

C-

WLAN offload indication

WLAN offload acceptability

9.9.4.18

NBIFOM container

9.9.4.19

TLV

3-257

Extended protocol configuration options

9.9.4.26

TLV-E

4-65538

Extended EPS QoS

Extended quality of service

9.9.4.30

TLV

8.3.3.2 Transaction identifier

If the UE supports A/Gb mode or Iu mode or both, a network supporting mobility from S1 mode to A/Gb mode or Iu mode or both shall include this IE

8.3.3.3 Negotiated QoS

If the UE supports A/Gb mode or Iu mode or both, a network supporting mobility from S1 mode to A/Gb mode or Iu mode or both shall include the corresponding R99 QoS parameter values of a PDP context.

8.3.3.4 Negotiated LLC SAPI

If the UE supports A/Gb mode, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.3.5 Radio priority

If the UE supports A/Gb mode, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.3.6 Packet flow identifier

If the UE supports A/Gb mode and BSS packet flow procedures, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.3.7 Protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is not supported by the UE or the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.3.8 WLAN offload indication

This IE shall be included in the message when the network wishes to indicate if the UE is allowed to offload the traffic of the associated PDN connection to WLAN(s), as specified in clause 9.9.4.18.

8.3.3.9 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.3.10 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.3.11 Extended EPS QoS

This IE shall be included in the message only if the network wishes to transmit the maximum and guaranteed bit rate values to the UE and at least one of the values to be transmitted exceeds the maximum value specified in the EPS quality of service information element in clause 9.9.4.3.

8.3.4 Activate default EPS bearer context accept

8.3.4.1 Message definition

This message is sent by the UE to the network to acknowledge activation of a default EPS bearer context. See table 8.3.4.1.

Message type: ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT

Significance: dual

Direction: UE to network

Table 8.3.4.1: ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT message content

IEI

Information Element

Type/Reference

Presence

Format

Length

Protocol discriminator

9.2

1/2

EPS bearer identity

9.3.2

1/2

Procedure transaction identity

9.4

Activate default EPS bearer context accept message identity

Message type

9.8

Protocol configuration options

9.9.4.11

TLV

3-253

Extended protocol configuration options

9.9.4.26

TLV-E

4-65538

8.3.4.2 Protocol configuration options

8.3.4.3 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.5 Activate default EPS bearer context reject

8.3.5.1 Message definition

This message is sent by UE to the network to reject activation of a default EPS bearer context. See table 8.3.5.1.

Message type: ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT

Significance: dual

Direction: UE to network

Table 8.3.5.1: ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Activate default EPS bearer context reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.5.2 Protocol configuration options

8.3.5.3 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.6 Activate default EPS bearer context request

8.3.6.1 Message definition

This message is sent by the network to the UE to request activation of a default EPS bearer context. See table 8.3.6.1.

Message type: ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST

Significance: dual

Direction: network to UE

Table 8.3.6.1: ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message content

IEI

Information Element

Type/Reference

Presence

Format

Length

Protocol discriminator

9.2

1/2

EPS bearer identity

9.3.2

1/2

Procedure transaction identity

9.4

Activate default EPS bearer context request message identity

Message type

9.8

EPS QoS

EPS quality of service

9.9.4.3

2-14

Access point name

9.9.4.1

2-101

PDN address

9.9.4.9

6-14

Transaction identifier

9.9.4.17

TLV

3-4

Negotiated QoS

Quality of service

9.9.4.12

TLV

14-22

Negotiated LLC SAPI

LLC service access point identifier

9.9.4.7

Radio priority

9.9.4.13

Packet flow Identifier

9.9.4.8

TLV

APN-AMBR

APN aggregate maximum bit rate

9.9.4.2

TLV

4-8

ESM cause

9.9.4.4

Protocol configuration options

9.9.4.11

TLV

3-253

B-

Connectivity type

9.9.4.2A

C-

WLAN offload indication

WLAN offload acceptability

9.9.4.18

NBIFOM container

9.9.4.19

TLV

3-257

Header compression configuration

9.9.4.22

TLV

5-257

Control plane only indication

9.9.4.23

Extended protocol configuration options

9.9.4.26

TLV-E

4-65538

Serving PLMN rate control

9.9.4.28

TLV

Extended APN-AMBR

Extended APN aggregate maximum bit rate

9.9.4.29

TLV

8.3.6.2 Transaction identifier

If the UE supports A/Gb mode or Iu mode or both, a network supporting mobility from S1 mode to A/Gb mode or Iu mode or both shall include this IE.

8.3.6.3 Negotiated QoS

If the UE supports A/Gb mode or Iu mode or both, a network supporting mobility from S1 mode to A/Gb mode or Iu mode or both shall include the corresponding R99 QoS parameter values of a PDP context.

8.3.6.4 Negotiated LLC SAPI

If the UE supports A/Gb mode, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.6.5 Radio priority

If the UE supports A/Gb mode, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.6.6 Packet flow identifier

If the UE supports A/Gb mode and BSS packet flow procedures, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.6.7 APN-AMBR

This IE is included in the message when the network wishes to transmit the APN-AMBR to the UE for possible uplink policy enforcement.

8.3.6.8 ESM cause

The network shall include this IE, if the network allocated a PDN address of a PDN type which is different from the PDN type requested by the UE.

8.3.6.9 Protocol configuration options

This IE shall be included if the network supports Local IP address in the traffic flow aggregate description and TFT filter, the PDN Type is different from Non-IP and Ethernet, and the extended protocol configuration options is not supported by the UE or the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.6.10 Connectivity type

The network shall include the Connectivity type IE if:

– the network is configured to indicate when a PDN connection is a LIPA PDN connection; and

– the present PDN connection is a LIPA PDN connection.

8.3.6.11 WLAN offload indication

This IE shall be included in the message when the network wishes to indicate if the UE is allowed to offload the traffic of the associated PDN connection to WLAN(s), as specified in clause 9.9.4.18.

8.3.6.12 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.6.13 Header compression configuration

The network may include the Header compression configuration IE if:

– the network accepts an IP PDN type; and

– control plane CIoT EPS optimization is selected.

8.3.6.14 Control plane only indication

The network shall include the Control plane only indication IE if the associated PDN connection is only for control plane CIoT EPS optimization.

8.3.6.15 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

This IE shall be included if the network supports Local IP address in the traffic flow aggregate description and TFT filter, the PDN Type is different from Non-IP and Ethernet, and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.6.16 Serving PLMN rate control

This IE shall be included when the network wishes to indicate the maximum number of uplink ESM DATA TRANSPORT messages including User data container IEs the UE is allowed to send per 6 minute interval.

8.3.6.17 Extended APN aggregate maximum bit rate

This IE shall be included in the message only if the network wishes to transmit the APN-AMBR values to the UE for possible uplink policy enforcement and at least one of the values to be transmitted exceeds the maximum value specified in the APN aggregate maximum bit rate information element in clause 9.9.4.2.

8.3.7 Bearer resource allocation reject

8.3.7.1 Message definition

This message is sent by the network to the UE to reject the allocation of a dedicated bearer resource. See table 8.3.7.1.

Message type: BEARER RESOURCE ALLOCATION REJECT

Significance: dual

Direction: network to UE

Table 8.3.7.1: BEARER RESOURCE ALLOCATION REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Bearer resource allocation reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
37	Back-off timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
6B	Re-attempt indicator	Re-attempt indicator 9.9.4.13A	O	TLV	3
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.7.2 Protocol configuration options

8.3.7.3 Back-off timer value

The network may include this IE if the ESM cause is not #65 "maximum number of EPS bearers reached", to request a minimum time interval before procedure retry is allowed.

8.3.7.4 Re-attempt indicator

The network may include this IE only if it includes the Back-off timer value IE and the ESM cause value is not #26 "insufficient resources".

8.3.7.5 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.7.6 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.8 Bearer resource allocation request

8.3.8.1 Message definition

This message is sent by the UE to the network to request the allocation of a dedicated bearer resource. See table 8.3.8.1.

Message type: BEARER RESOURCE ALLOCATION REQUEST

Significance: dual

Direction: UE to network

Table 8.3.8.1: BEARER RESOURCE ALLOCATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Bearer resource allocation request message identity	Message type 9.8	M	V	1
	Linked EPS bearer identity	Linked EPS bearer identity 9.9.4.6	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
	Traffic flow aggregate	Traffic flow aggregate description 9.9.4.15	M	LV	2-256
	Required traffic flow QoS	EPS quality of service 9.9.4.3	M	LV	2-14
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
C-	Device properties	Device properties 9.9.2.0A	O	TV	1
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538
5C	Extended EPS QoS	Extended quality of service 9.9.4.30	O	TLV	12

8.3.8.2 Protocol configuration options

8.3.8.3 Device properties

The UE shall include this IE if the UE is configured for NAS signalling low priority.

8.3.8.4 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.8.5 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.8.6 Extended EPS QoS

This IE shall be included in the message only if the UE wishes to transmit the maximum and guaranteed bit rate values to the network and at least one of the values to be transmitted exceeds the maximum value specified in the EPS quality of service information element in clause 9.9.4.3.

8.3.9 Bearer resource modification reject

8.3.9.1 Message definition

This message is sent by the network to the UE to reject the modification of a dedicated bearer resource. See table 8.3.9.1.

Message type: BEARER RESOURCE MODIFICATION REJECT

Significance: dual

Direction: network to UE

Table 8.3.9.1: BEARER RESOURCE MODIFICATION REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Bearer resource modification reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
37	Back-off timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
6B	Re-attempt indicator	Re-attempt indicator 9.9.4.13A	O	TLV	3
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.9.2 Protocol configuration options

8.3.9.3 Back-off timer value

The network may include this IE to request a minimum time interval before procedure retry is allowed.

8.3.9.4 Re-attempt indicator

The network may include this IE only if it includes the Back-off timer value IE and the ESM cause value is not #26 "insufficient resources".

8.3.9.5 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.9.6 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.10 Bearer resource modification request

8.3.10.1 Message definition

This message is sent by the UE to the network to request the modification of a dedicated bearer resource, or to request re-negotiation of header compression configuration associated to an EPS bearer context if the network has previously indicated support of Control plane CIoT EPS optimization and Header compression for control plane CIoT EPS optimization. See table 8.3.10.1.

Message type: BEARER RESOURCE MODIFICATION REQUEST

Significance: dual

Direction: UE to network

Table 8.3.10.1: BEARER RESOURCE MODIFICATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Bearer resource modification request message identity	Message type 9.8	M	V	1
	EPS bearer identity for packet filter	Linked EPS bearer identity 9.9.4.6	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
	Traffic flow aggregate	Traffic flow aggregate description 9.9.4.15	M	LV	2-256
5B	Required traffic flow QoS	EPS quality of service 9.9.4.3	O	TLV	3-15
58	ESM cause	ESM cause 9.9.4.4	O	TV	2
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
C-	Device properties	Device properties 9.9.2.0A	O	TV	1
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
66	Header compression configuration	Header compression configuration 9.9.4.22	O	TLV	5-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538
5C	Extended EPS QoS	Extended quality of service 9.9.4.30	O	TLV	12

8.3.10.2 Required traffic flow QoS

This IE is included in the message when the UE requests a change of QoS for the indicated traffic flows and does not request to release all bearer resources for the EPS bearer context.

8.3.10.3 ESM cause

This IE is included in the message when the UE requests the release of a dedicated bearer resource.

8.3.10.4 Protocol configuration options

8.3.10.5 Device properties

The UE shall include this IE if the UE is configured for NAS signalling low priority.

8.3.10.6 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.10.7 Header compression configuration

This IE is included in the message if:

a) the UE wishes to re-negotiate header compression configuration associated to an EPS bearer context and both the UE and the network supports Control plane CIoT EPS optimization and header compression; or

b) to negotiate header compression configuration associated to an EPS bearer context after an inter-system change from N1 mode to S1 mode when both the UE and the network support control plane CIoT EPS optimization and header compression, and the UE is operating in single-registration mode and has received the interworking without N26 interface indicator set to "interworking without N26 interface not supported" from the network.

8.3.10.8 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.10.9 Extended EPS QoS

8.3.11 Deactivate EPS bearer context accept

8.3.11.1 Message definition

This message is sent by the UE to acknowledge deactivation of the EPS bearer context requested in the corresponding Deactivate EPS bearer context request message. See table 8.3.11.1.

Message type: DEACTIVATE EPS BEARER CONTEXT ACCEPT

Significance: dual

Direction: UE to network

Table 8.3.11.1: DEACTIVATE EPS BEARER CONTEXT ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Deactivate EPS bearer context accept message identity	Message type 9.8	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.11.2 Protocol configuration options

8.3.11.3 Void

8.3.11.4 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.12 Deactivate EPS bearer context request

8.3.12.1 Message definition

This message is sent by the network to request deactivation of an active EPS bearer context. See table 8.3.12.1.

Message type: DEACTIVATE EPS BEARER CONTEXT REQUEST

Significance: dual

Direction: network to UE

Table 8.3.12.1: DEACTIVATE EPS BEARER CONTEXT REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Deactivate EPS bearer context request message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
37	T3396 value	GPRS timer 3 9.9.3.16B	O	TLV	3
C-	WLAN offload indication	WLAN offload acceptability 9.9.4.18	O	TV	1
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.12.2 Protocol configuration options

8.3.12.3 T3396 value

The network may include this IE if the ESM cause is #26 "insufficient resources".

8.3.12.4 WLAN offload indication

This IE shall be included in the message when the network wishes to indicate if the UE is allowed to offload the traffic of the associated PDN connection to WLAN(s), as specified in clause 9.9.4.18. If the MME wishes to deactivate all EPS bearer contexts of a PDN connection, MME shall not include this IE.

8.3.12.5 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.12.6 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.12A ESM dummy message

This message is sent by the UE or the network included in an ESM message container information element during an attach procedure, if the UE does not request for PDN connection. See table 8.3.12A.1.

Message type: ESM DUMMY MESSAGE

Significance: dual

Direction: both

Table 8.3.12A.1: ESM DUMMY MESSAGE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	ESM dummy message message identity	Message type 9.8	M	V	1

8.3.13 ESM information request

This message is sent by the network to the UE to request the UE to provide ESM information, i.e. protocol configuration options or APN or both. See table 8.3.13.1.

Message type: ESM INFORMATION REQUEST

Significance: dual

Direction: network to UE

Table 8.3.13.1: ESM INFORMATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	ESM information request message identity	Message type 9.8	M	V	1

8.3.14 ESM information response

8.3.14.1 Message definition

This message is sent by the UE to the network in response to an ESM INFORMATION REQUEST message and provides the requested ESM information. See table 8.3.14.1.

Message type: ESM INFORMATION RESPONSE

Significance: dual

Direction: UE to network

Table 8.3.14.1: ESM INFORMATION RESPONSE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	ESM information response message identity	Message type 9.8	M	V	1
28	Access point name	Access point name 9.9.4.1	O	TLV	3-102
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.14.2 Access point name

This IE is included in the message when the UE wishes to request network connectivity as defined by a certain access point name during the attach procedure.

8.3.14.3 Protocol configuration options

This IE shall be included in the message when, during the attach procedure, the UE wishes to transmit security protected (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network, and:

a) the UE is in WB-S1 mode;

b) the requested PDN Type is different from non-IP and Ethernet; and

c) the requested APN is not for UAS services.

This IE shall be included if:

a) the UE supports local IP address in traffic flow aggregate description and TFT filter;

b) the UE is in WB-S1 mode;

c) the requested PDN Type is different from non-IP and Ethernet; and

d) the requested APN is not for UAS services.

This IE shall not be included if the Extended protocol configuration options IE is included in the message.

8.3.14.4 Extended protocol configuration options

a) the UE is in NB-S1 mode;

b) the requested PDN Type is non-IP or Ethernet; or

c) the requested APN is for UAS services.

This IE shall be included if:

a) the UE supports local IP address in traffic flow aggregate description and TFT filter, the UE is in NB-S1 mode and the requested PDN Type is different from non-IP and Ethernet; or

b) the UE supports local IP address in traffic flow aggregate description and TFT filter, the requested PDN Type is different from non-IP and Ethernet, and the requested APN is for UAS services.

This IE shall not be included if the Protocol configuration options IE is included in the message.

8.3.15 ESM status

This message is sent by the network or the UE to pass information on the status of the indicated EPS bearer context and report certain error conditions (e.g. as listed in clause 7). See table 8.3.15.1.

Message type: ESM STATUS

Significance: dual

Direction: both

Table 8.3.15.1: ESM STATUS message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	ESM status message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1

8.3.16 Modify EPS bearer context accept

8.3.16.1 Message definition

This message is sent by the UE to the network to acknowledge the modification of an active EPS bearer context. See table 8.3.16.1.

Message type: MODIFY EPS BEARER CONTEXT ACCEPT

Significance: dual

Direction: UE to network

Table 8.3.16.1: MODIFY EPS BEARER CONTEXT ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Modify EPS bearer context accept message identity	Message type 9.8	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.16.2 Protocol configuration options

8.3.16.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.16.4 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.17 Modify EPS bearer context reject

8.3.17.1 Message definition

This message is sent by the UE or the network to reject a modification of an active EPS bearer context. See table 8.3.17.1.

Message type: MODIFY EPS BEARER CONTEXT REJECT

Significance: dual

Direction: UE to network

Table 8.3.17.1: MODIFY EPS BEARER CONTEXT REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Modify EPS bearer context reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.17.2 Protocol configuration options

8.3.17.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.17.4 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.18 Modify EPS bearer context request

8.3.18.1 Message definition

This message is sent by the network to the UE to request modification of an active EPS bearer context, or to request re-negotiation of header compression configuration associated to an EPS bearer context if the UE has previously indicated support of Control plane CIoT EPS optimization and Header compression for control plane CIoT EPS optimization. See table 8.3.18.1.

Message type: MODIFY EPS BEARER CONTEXT REQUEST

Significance: dual

Direction: network to UE

Table 8.3.18.1: MODIFY EPS BEARER CONTEXT REQUEST message content

IEI

Information Element

Type/Reference

Presence

Format

Length

Protocol discriminator

9.2

1/2

EPS bearer identity

9.3.2

1/2

Procedure transaction identity

9.4

Modify EPS bearer context request message identity

Message type

9.8

New EPS QoS

EPS quality of service

9.9.4.3

TLV

3-15

TFT

Traffic flow template

9.9.4.16

TLV

3-257

New QoS

Quality of service

9.9.4.12

TLV

14-22

Negotiated LLC SAPI

LLC service access point identifier

9.9.4.7

Radio priority

9.9.4.13

Packet flow Identifier

9.9.4.8

TLV

APN-AMBR

APN aggregate maximum bit rate

9.9.4.2

TLV

4-8

Protocol configuration options

9.9.4.11

TLV

3-253

C-

WLAN offload indication

WLAN offload acceptability

9.9.4.18

NBIFOM container

9.9.4.19

TLV

3-257

Header compression configuration

9.9.4.22

TLV

5-257

Extended protocol configuration options

9.9.4.26

TLV-E

4-65538

Extended APN-AMBR

Extended APN aggregate maximum bit rate

9.9.4.29

TLV

Extended EPS QoS

Extended quality of service

9.9.4.30

TLV

8.3.18.2 New EPS QoS

When the EPS QoS of the EPS bearer context is modified, the network shall include the modified EPS QoS assigned to the EPS bearer context.

8.3.18.3 TFT

This IE provides the UE with packet filters.

8.3.18.4 New QoS

If the UE supports A/Gb mode or Iu mode or both and when the corresponding R99 QoS of the EPS bearer context is modified, a network supporting mobility from S1 mode to A/Gb mode or Iu mode or both shall include the corresponding R99 QoS parameter values of a PDP context.

8.3.18.5 Negotiated LLC SAPI

If the UE supports A/Gb mode and when the negotiated LLC SAPI is modified, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.18.6 Radio priority

If the UE supports A/Gb mode and when the radio priority is modified, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.18.7 Packet flow identifier

If the UE supports A/Gb mode and BSS packet flow procedures, a network supporting mobility from S1 mode to A/Gb mode shall include this IE.

8.3.18.8 APN-AMBR

This IE is included when the APN-AMBR has been changed by the network.

8.3.18.9 Protocol configuration options

8.3.18.10 WLAN offload indication

This IE shall be included in the message when the network wishes to indicate if the UE is allowed to offload the traffic of the associated PDN connection to WLAN(s), as specified in clause 9.9.4.18.

8.3.18.11 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.18.12 Header compression configuration

This IE is included in the message if the network wishes to re-negotiate header compression configuration associated to an EPS bearer context and both the UE and the network support Control plane CIoT EPS optimization and header compression.

8.3.18.13 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.18.14 Extended APN-AMBR

This IE shall be included in the message only if at least one of the APN-AMBR values has been changed by the network and at least one of the values to be transmitted exceeds the maximum value specified in the APN aggregate maximum bit rate information element in clause 9.9.4.2.

8.3.18.15 Extended EPS QoS

8.3.18A Notification

This message is sent by the network to inform the UE about events which are relevant for the upper layer using an EPS bearer context or having requested a procedure transaction. See table 8.3.18A.1.

Message type: NOTIFICATION

Significance: local

Direction: network to UE

Table 8.3.18A.1: NOTIFICATION message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Notification message identity	Message type 9.8	M	V	1
	Notification indicator	Notification indicator 9.9.4.7A	M	LV	2

8.3.19 PDN connectivity reject

8.3.19.1 Message definition

This message is sent by the network to the UE to reject establishment of a PDN connection. See table 8.3.19.1.

Message type: PDN CONNECTIVITY REJECT

Significance: dual

Direction: network to UE

Table 8.3.19.1: PDN CONNECTIVITY REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	PDN connectivity reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
37	Back-off timer value	GPRS timer 3 9.9.3.16B	O	TLV	3
6B	Re-attempt indicator	Re-attempt indicator 9.9.4.13A	O	TLV	3
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.19.2 Protocol configuration options

8.3.19.3 Back-off timer value

The network may include this IE if the ESM cause is not #28 "unknown PDN type", #50 "PDN type IPv4 only allowed", #51 "PDN type IPv6 only allowed", #54 "PDN connection does not exist", #57 "PDN type IPv4v6 only allowed", #58 "PDN type non IP only allowed", #61 "PDN type Ethernet only allowed", or #65 "maximum number of EPS bearers reached", to request a minimum time interval before procedure retry is allowed.

8.3.19.4 Re-attempt indicator

The network may include this IE only if the ESM cause value is #28 "unknown PDN type", #50 "PDN type IPv4 only allowed", #51 "PDN type IPv6 only allowed", #57 "PDN type IPv4v6 only allowed", #58 "PDN type non IP only allowed", #61 "PDN type Ethernet only allowed", or #66 "requested APN not supported in current RAT and PLMN combination", or if the network includes the Back-off timer value IE and the ESM cause value is not #26 "insufficient resources".

8.3.19.5 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.20 PDN connectivity request

8.3.20.1 Message definition

This message is sent by the UE to the network to initiate establishment of a PDN connection. See table 8.3.20.1.

Message type: PDN CONNECTIVITY REQUEST

Significance: dual

Direction: UE to network

Table 8.3.20.1: PDN CONNECTIVITY REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	PDN connectivity request message identity	Message type 9.8	M	V	1
	Request type	Request type 9.9.4.14	M	V	1/2
	PDN type	PDN type 9.9.4.10	M	V	1/2
D-	ESM information transfer flag	ESM information transfer flag 9.9.4.5	O	TV	1
28	Access point name	Access point name 9.9.4.1	O	TLV	3-102
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
C-	Device properties	Device properties 9.9.2.0A	O	TV	1
33	NBIFOM container	NBIFOM container 9.9.4.19	O	TLV	3-257
66	Header compression configuration	Header compression configuration 9.9.4.22	O	TLV	5-257
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.20.2 ESM information transfer flag

The UE shall include this IE in the PDN CONNECTIVITY REQUEST message sent during the attach procedure if the UE has protocol configuration options that need to be transferred security protected or wishes to provide an access point name for the PDN connection to be established during the attach procedure.

8.3.20.3 Access point name

This IE is included in the message when the UE wishes to request network connectivity as defined by a certain access point name. This IE shall not be included when the PDN CONNECTIVITY REQUEST message is included in an ATTACH REQUEST message or if the request type indicates "emergency" or "handover of emergency bearer services" or "RLOS".

8.3.20.4 Protocol configuration options

This IE shall be included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network, and:

a) the UE is in WB-S1 mode;

b) the requested PDN Type is different from non-IP and Ethernet; and

c) the requested APN is not for UAS services.

This IE shall be included if:

a) the UE supports local IP address in traffic flow aggregate description and TFT filter;

b) the UE is in WB-S1 mode;

c) the requested PDN Type is different from non-IP and Ethernet; and

d) the requested APN is not for UAS services.

This IE shall not be included if the Extended protocol configuration options IE is included in the message.

8.3.20.5 Device properties

The UE shall include this IE if the UE is configured for NAS signalling low priority.

8.3.20.6 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [36].

8.3.20.7 Header compression configuration

The UE shall include the Header compression configuration IE if:

– the PDN type value of the PDN type IE is set to IPv4 or IPv6 or IPv4v6;

– the UE indicates "Control Plane CIoT EPS optimization supported" in the UE network capability IE of the ATTACH REQUEST message; and

– the UE supports header compression.

8.3.20.8 Extended protocol configuration options

This IE shall be included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network, and:

a) the UE is in NB-S1 mode;

b) the requested PDN Type is non-IP or Ethernet; or

c) the requested APN is for UAS services.

This IE shall be included if:

a) the UE supports local IP address in traffic flow aggregate description and TFT filter, the UE is in NB-S1 mode and the requested PDN Type is different from non-IP and Ethernet; or

b) the UE supports local IP address in traffic flow aggregate description and TFT filter, the requested PDN Type is different from non-IP and Ethernet, and the requested APN is for UAS services.

This IE shall not be included if the Protocol configuration options IE is included in the message.

8.3.21 PDN disconnect reject

8.3.21.1 Message definition

This message is sent by the network to the UE to reject release of a PDN connection. See table 8.3.21.1.

Message type: PDN DISCONNECT REJECT

Significance: dual

Direction: network to UE

Table 8.3.21.1: PDN DISCONNECT REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	PDN disconnect reject message identity	Message type 9.8	M	V	1
	ESM cause	ESM cause 9.9.4.4	M	V	1
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.21.2 Protocol configuration options

8.3.21.3 Extended protocol configuration options

This IE is included in the message when the network wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the UE and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.22 PDN disconnect request

8.3.22.1 Message definition

This message is sent by the UE to the network to initiate release of a PDN connection. See table 8.3.22.1.

Message type: PDN DISCONNECT REQUEST

Significance: dual

Direction: UE to network

Table 8.3.22.1: PDN DISCONNECT REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	PDN disconnect request message identity	Message type 9.8	M	V	1
	Linked EPS bearer identity	Linked EPS bearer identity 9.9.4.6	M	V	1/2
	Spare half octet	Spare half octet 9.9.2.9	M	V	1/2
27	Protocol configuration options	Protocol configuration options 9.9.4.11	O	TLV	3-253
7B	Extended protocol configuration options	Extended protocol configuration options 9.9.4.26	O	TLV-E	4-65538

8.3.22.2 Protocol configuration options

8.3.22.3 Extended protocol configuration options

This IE is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network and the extended protocol configuration options is supported by both the UE and the network end-to-end for the PDN connection (see clause 6.6.1.1).

8.3.23 Remote UE report

8.3.23.1 Message definition

This message is sent by the UE to the network to report connection or disconnection of remote UE(s). See table 8.3.23.1.

Message type: REMOTE UE REPORT

Significance: dual

Direction: UE to network

Table 8.3.23.1: REMOTE UE REPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Remote UE report message identity	Message type 9.8	M	V	1
79	Remote UE Context Connected	Remote UE context list IE 9.9.4.20	O	TLV-E	3-65538
7A	Remote UE Context Disconnected	Remote UE context list IE 9.9.4.20	O	TLV-E	3-65538
6F	ProSe Key Management Function address	PKMF address IE 9.9.4.21	O	TLV	3-19

8.3.23.2 Remote UE Context Connected

This IE is included in the message by the UE acting as ProSe UE-to-network relay to provide the network with newly connected remote UE information as specified in 3GPP TS 23.303 [31].

8.3.23.3 Remote UE Context Disconnected

This IE is included in the message by the UE acting as ProSe UE-to-Network Relay to provide the network with disconnected remote UE information as specified in 3GPP TS 23.303 [31].

8.3.23.4 ProSe Key Management Function Address

This IE is included in the message by the UE acting as ProSe UE-to-network relay to provide the network with the address of the ProSe Key Management Function associated with the remote UEs connected to or disconnected from the ProSe UE-to-network relay.

8.3.24 Remote UE report response

8.3.24.1 Message definition

This message is sent by the network to the UE to acknowledge receipt of a Remote UE report message. See table 8.3.24.1.

Message type: REMOTE UE REPORT RESPONSE

Significance: dual

Direction: network to UE

Table 8.3.24.1: REMOTE UE REPORT RESPONSE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	Remote UE report response message identity	Message type 9.8	M	V	1

8.3.25 ESM DATA TRANSPORT

8.3.25.1 Message definition

This message is sent by the UE or the network in order to carry user data in an encapsulated format. See table 8.3.25.1.

Message type: ESM DATA TRANSPORT

Significance: dual

Direction: both

Table 8.3.25.1: ESM DATA TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Protocol discriminator	Protocol discriminator 9.2	M	V	1/2
	EPS bearer identity	EPS bearer identity 9.3.2	M	V	1/2
	Procedure transaction identity	Procedure transaction identity 9.4	M	V	1
	ESM data transport message identity	Message type 9.8	M	V	1
	User data container	User data container 9.9.4.24	M	LV-E	2-n
F-	Release assistance indication	Release assistance indication 9.9.4.25	O	TV	1

8.3.25.2 Release assistance indication

The UE may include this IE to inform the network whether

– no further uplink and no further downlink data transmission is expected; or

– only a single downlink data transmission (e.g. acknowledgement or response to uplink data) and no further uplink data transmission subsequent to the uplink data transmission is expected.