7 Message functional definitions and contents

24.2443GPPRelease 17Stage 3TSWireless LAN control plane protocol for trusted WLAN access to EPC

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

7.1 PDN connectivity request

7.1.1 Message definition

This message is sent by the UE to the network to initiate establishment of a PDN connection. See table 7.1.1.1.

Message type: PDN CONNECTIVITY REQUEST

Direction: UE to network

Table 7.1.1.1: PDN CONNECTIVITY REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity request message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	Request type	Request type 8.4	M	V	1/2
	PDN type	PDN type 8.5	M	V	1/2
28	Access point name	Access point name 8.6	O	TLV	3-102
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257
A-	UE N3G capability	UE N3G capability 8.14	O	TV	1

7.1.2 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 PDN connection establishment procedure.

7.1.3 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.

7.1.4 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.1.5 UE N3G capability

This IE is included in the message to indicate UE capabilities related to non-3GPP access when the UE is accessing EPC via trusted WLAN access network during the PDN connection establishment procedure.

7.2 PDN connectivity accept

7.2.1 Message definition

This message is sent by the network to the UE to acknowledge activation of a PDN connection. See table 7.2.1.1.

Message type: PDN CONNECTIVITY ACCEPT

Direction: network to UE

Table 7.2.1.1: PDN CONNECTIVITY ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity accept message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	Access point name	Access point name 8.6	M	LV	2-101
	PDN Address	PDN address 8.8	M	LV	6-14
	PDN connection ID	PDN connection ID 8.9	M	V	1
	User Plane Connection ID	User Plane Connection ID 8.10	M	V	6
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
58	Cause	Cause 8.11	O	TV	2
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257
B-	WLCP bearer identity	WLCP bearer identity 8.15	O	TV	1
5B	Bearer level QoS	EPS quality of service 8.16	O	TLV	3-15
5E	APN-AMBR	APN aggregate maximum bit rate 8.19	O	TLV	4-8

7.2.2 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.

7.2.3 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.

7.2.4 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.2.5 WLCP bearer identity

This IE is included in the message if multiple bearer PDN connectivity is used and TWAG has assigned a WLCP bearer identity for the default WLCP bearer of the newly activated PDN connection.

7.2.6 Bearer level QoS

This IE is included in the message if multiple bearer PDN connectivity is used and the TWAG requests to provide the QoS for default WLCP bearer.

7.2.7 APN-AMBR

This IE is included in the message if multiple bearer PDN connectivity is used and the TWAG requests to provide the APN-AMBR for the PDN connection.

7.3 PDN connectivity reject

7.3.1 Message definition

This message is sent by the network to the UE to reject activation of a PDN connection. See table 7.3.1.1.

Message type: PDN CONNECTIVITY REJECT

Direction: network to UE

Table 7.3.1.1: PDN CONNECTIVITY REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity reject message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	Cause	Cause 8.11	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
37	Tw1 value	GPRS timer 3 8.12	O	TLV	3
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257

7.3.2 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.

7.3.3 Tw1 value

This IE may be included in the message when the cause is #26 "insufficient resources".

7.4 PDN disconnect request

7.4.1 Message definition

This message is sent by the network or the UE to initiate release of a PDN connection. See table 7.4.1.1.

Message type: PDN DISCONNECT REQUEST

Direction: both

Table 7.4.1.1: PDN DISCONNECT REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN disconnect request message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
58	Cause	Cause 8.11	O	TV	2
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.4.2 Protocol configuration options

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

7.5 PDN disconnect accept

7.5.1 Message definition

This message is sent by the network or the UE to acknowledge release of a PDN connection. See table 7.5.1.1.

Message type: PDN DISCONNECT ACCEPT

Direction: both

Table 7.5.1.1: PDN DISCONNECT ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity accept message identity	Message type8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1/2
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.5.2 Protocol configuration options

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

7.6 PDN disconnect reject

7.6.1 Message definition

This message is sent by the network to the UE to reject release of a PDN connection. See table 7.6.1.1.

Message type: PDN DISCONNECT REJECT

Direction: network to UE

Table 7.6.1.1: PDN DISCONNECT REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity reject message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
58	Cause	Cause 8.11	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.6.2 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.

7.7 PDN connectivity complete

7.7.1 Message definition

This message is sent by the UE to acknowledge establishment of a PDN connection. See table 7.7.1.1.

Message type: PDN CONNECTIVITY COMPLETE

Direction: UE to network

Table 7.7.1.1: PDN CONNECTIVITY COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity complete	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1

7.8 Status message

7.8.1 Message definition

This message is sent by the network or the UE to report certain error conditions detected upon receipt of WLCP protocol data as specified in subclause 5.5. See table 7.8.1.1.

Message type: STATUS

Direction: both

Table 7.8.1.1: STATUS message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Status	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
	Cause	Cause 8.11	M	V	1

7.9 PDN modification request

7.9.1 Message definition

This message is sent by the network to initiate modification of a PDN connection. See table 7.9.1.1.

Message type: PDN MODIFICATION REQUEST

Direction: network to UE

Table 7.9.1.1: PDN MODIFICATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN modify request message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257

7.9.2 Protocol configuration options

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

7.9.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.10 PDN modification accept

7.10.1 Message definition

This message is sent by the UE to acknowledge modification of a PDN connection. See table 7.10.1.1.

Message type: PDN MODIFICATION ACCEPT

Direction: UE to network

Table 7.10.1.1: PDN MODIFICATION ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity accept message identity	Message type8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1/2
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257

7.10.2 Protocol configuration options

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

7.10.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.11 PDN modification reject

7.11.1 Message definition

This message is sent by the network or the UE to reject to modify a PDN connection. See table 7.11.1.1.

Message type: PDN MODIFICATION REJECT

Direction: both

Table 7.11.1.1: PDN MODIFICATION REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN connectivity reject message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
58	Cause	Cause 8.11	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257

7.11.2 Protocol configuration options

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

7.11.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.12 PDN modification indication

7.12.1 Message definition

This message is sent by the UE to request the network to initiate PDN connection modification procedure. See table 7.12.1.1.

Message type: PDN MODIFICATION INDICATION

Direction: UE to network

Table 7.12.1.1: PDN MODIFICATION INDICATION message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	PDN modification indication message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Transaction identifier 8.3	M	V	1
	PDN connection ID	PDN connection ID 8.9	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253
33	NBIFOM container	NBIFOM container 8.13	O	TLV	3-257

7.12.2 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 UE.

7.12.3 NBIFOM container

This information element is used to transfer information associated with network-based IP flow mobility, see 3GPP TS 24.161 [10].

7.13 WLCP bearer setup request

7.13.1 Message definition

This message is sent by the TWAG to the UE to request activation of a WLCP bearer for the given PDN connection. See table 7.13.1.1.

Message type: WLCP BEARER SETUP REQUEST

Significance: dual

Direction: network to UE

Table 7.13.1.1: WLCP BEARER SETUP REQUEST message content

IEI

Information Element

Type/Reference

Presence

Format

Length

WLCP bearer setup request message identity

Message type

8.2

WLCP bearer identity

8.15

1/2

Spare half octet

8.18

1/2

PDN connection ID

PDN connection ID
8.9

User Plane Connection ID

User Plane Connection ID
8.10

Bearer level QoS

EPS quality of service

8.16

2-14

TFT

Traffic flow template

8.17

2-256

Protocol configuration options

8.7

TLV

3-253

7.13.2 Protocol configuration options

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

7.14 WLCP bearer setup accept

7.14.1 Message definition

This message is sent by the UE to the TWAG to acknowledge activation of a WLCP bearer context associated with the given PDN connection ID. See table 7.14.1.1.

Message type: WLCP BEARER SETUP ACCEPT

Significance: dual

Direction: UE to TWAG

Table 7.14.1.1: WLCP BEARER SETUP ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	WLCP bearer setup accept message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Procedure transaction identity 8.3	M	V	1
	WLCP bearer identity	WLCP bearer identity 8.15	M	V	1/2
	Spare half octet	Spare half octet 8.18	M	V	1/2
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.14.2 Protocol configuration options

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

7.15 WLCP bearer setup reject

7.15.1 Message definition

This message is sent by the UE to the TWAG to reject creation of a WLCP bearer for the given PDN connection. See table 7.15.1.1.

Message type: WLCP BEARER SETUP REJECT

Significance: dual

Direction: UE to TWAG

Table 7.15.1.1: WLCP BEARER SETUP REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	WLCP bearer setup reject message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Procedure transaction identity 8.3	M	V	1
	WLCP bearer identity	WLCP bearer identity 8.15	M	V	1/2
	Spare half octet	Spare half octet 8.18	M	V	1/2
	Cause	Cause 8.11	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.15.2 Protocol configuration options

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

7.16 WLCP bearer modify request

7.16.1 Message definition

This message is sent by the TWAG to the UE to request modification of a WLCP bearer for the given PDN connection. See table 7.16.1.1.

Message type: WLCP BEARER MODIFY REQUEST

Significance: dual

Direction: network to UE

Table 7.16.1.1: WLCP BEARER MODIFY REQUEST message content

IEI

Information Element

Type/Reference

Presence

Format

Length

WLCP bearer modify request message identity

Message type

8.2

Procedure transaction identity

8.3

WLCP bearer identity

8.15

1/2

Spare half octet

8.18

1/2

PDN connection ID

PDN connection ID
8.9

Bearer level QoS

EPS quality of service

8.16

2-14

TFT

Traffic flow template

8.17

2-256

Cause

Cause
8.11

Protocol configuration options

8.7

TLV

3-253

APN-AMBR

APN aggregate maximum bit rate

8.19

TLV

4-8

7.16.2 Bearer level QoS

This IE is included in the message when the TWAG requests a change of QoS for the indicated traffic flows.

7.16.3 TFT

This IE is included in the message when the TWAG requests a change of QoS for the indicated traffic flows packet filters.

7.16.4 Cause

This IE is included in the message to indicate the cause for modification.

7.16.5 Protocol configuration options

IEI	Information Element	Type/Reference	Presence	Format	Length
	WLCP bearer release reject message identity	Message type 8.2	M	V	1
	Procedure transaction identity	Procedure transaction identity 8.3	M	V	1
	WLCP bearer identity	WLCP bearer identity 8.15	M	V	1/2
	Spare half octet	Spare half octet 8.18	M	V	1/2
	Cause	Cause 8.11	M	V	1
27	Protocol configuration options	Protocol configuration options 8.7	O	TLV	3-253

7.21.2 Protocol configuration options

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