9.1 Message Functional Definition and Content

36.4133GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17S1 Application Protocol (S1AP)TS

9.1.1 General

9.1.2 Message Contents

9.1.2.1 Presence

All information elements in the message descriptions below are marked mandatory, optional or conditional according to table 4.

Table 4: Meaning of abbreviations used in S1AP messages

Abbreviation

Meaning

M

IEs marked as Mandatory (M) shall always be included in the message.

O

IEs marked as Optional (O) may or may not be included in the message.

C

IEs marked as Conditional (C) shall be included in a message only if the condition is satisfied. Otherwise the IE shall not be included.

9.1.2.2 Criticality

Each Information Element or Group of Information Elements may have criticality information applied to it.
Following cases are possible:

Table 5: Meaning of content within “Criticality” column

Abbreviation

Meaning

–

No criticality information is applied explicitly.

YES

Criticality information is applied. This is usable only for non-repeatable IEs

GLOBAL

The IE and all its repetitions together have one common criticality information. This is usable only for repeatable IEs.

EACH

Each repetition of the IE has its own criticality information. It is not allowed to assign different criticality values to the repetitions. This is usable only for repeatable IEs.

9.1.2.3 Range

The Range column indicates the allowed number of copies of repetitive IEs/IE groups.

9.1.2.4 Assigned Criticality

This column provides the actual criticality information as defined in subclause 10.3.2, if applicable.

9.1.3 E-RAB Management Messages

9.1.3.1 E-RAB SETUP REQUEST

This message is sent by the MME and is used to request the eNB to assign resources on Uu and S1 for one or several E-RABs.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Aggregate Maximum Bit Rate

O

9.2.1.20

YES

reject

E-RAB to be Setup List

1

YES

reject

>E-RAB To Be Setup Item IEs

1 .. <maxnoof E-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>E-RAB Level QoS Parameters

M

9.2.1.15

Includes necessary QoS parameters.

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

EPC TEID.

–

>>NAS-PDU

M

9.2.3.5

–

>>Correlation ID

O

9.2.1.80

YES

ignore

>>SIPTO Correlation ID

O

Correlation ID

9.2.1.80

YES

ignore

>>Bearer Type

O

9.2.1.116

YES

reject

>>Ethernet Type

O

9.2.1.147

YES

ignore

>>Security Indication

O

9.2.1.163

YES

reject

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.2 E-RAB SETUP RESPONSE

This message is sent by the eNB and is used to report the outcome of the request from the E-RAB SETUP REQUEST message.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Setup List

0..1

YES

ignore

>E-RAB Setup Item IEs

1 .. <maxnoof E-RABs>

EACH

ignore

>>E-RAB ID

M

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

eNB TEID.

–

E-RAB Failed to Setup List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB Setup List IE and in E-RAB Failed to Setup List IE.

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.3 E-RAB MODIFY REQUEST

This message is sent by the MME and is used to request the eNB to modify the Data Radio Bearers and the allocated resources on Uu and S1 for one or several E-RABs or to change the S-GW as defined in TS 23.401 [11].

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Aggregate Maximum Bit Rate

O

9.2.1.20

YES

reject

E-RAB to be Modified List

1

YES

reject

>E-RAB To Be Modified Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>E-RAB Level QoS Parameters

M

9.2.1.15

Includes necessary QoS parameters.

–

>>NAS-PDU

M

9.2.3.5

–

>>Transport Information

O

YES

reject

>>>Transport Layer Address

M

9.2.2.1

–

>>>UL GTP TEID

M

GTP-TEID

9.2.2.2

–

Secondary RAT Data Usage Request

O

ENUMERATED (requested, …)

Yes

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.4 E-RAB MODIFY RESPONSE

This message is sent by the eNB and is used to report the outcome of the request from the E-RAB MODIFY REQUEST message.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Modify List

0..1

YES

ignore

>E-RAB Modify Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

E-RAB Failed to Modify List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB Modify List IE and E-RAB Failed to Modify List IE.

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.5 E-RAB RELEASE COMMAND

This message is sent by the MME and is used to request the eNB to release allocated resources on Uu and S1 for one or several E-RABs.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Aggregate Maximum Bit Rate

O

9.2.1.20

YES

reject

E-RAB To Be Released List

M

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB To Be Released List IE.

YES

ignore

NAS-PDU

O

9.2.3.5

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.6 E-RAB RELEASE RESPONSE

This message is sent by the eNB and is used to report the outcome of the request from the E-RAB RELEASE COMMAND message.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Release List

0..1

YES

ignore

>E-RAB Release Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

E-RAB Failed to Release List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB Release List IE and E-RAB Failed to Release List IE.

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

User Location Information

O

9.2.1.93

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.7 E-RAB RELEASE INDICATION

This message is sent by the eNB and is used to indicate the MME to release one or several E-RABs for one UE.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-RAB Released List

M

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB Released List IE.

YES

ignore

User Location Information

O

9.2.1.93

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.8 E-RAB MODIFICATION INDICATION

This message is sent by the eNB and is used to request the MME to apply the indicated modification for one or several E-RABs.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-RAB to be Modified List

1

YES

reject

>E-RAB to Be Modified Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>DL GTP TEID

M

GTP-TEID

9.2.2.2

–

E-RAB not to be Modified List

0..1

YES

reject

>E-RAB not to Be Modified Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>DL GTP TEID

M

GTP-TEID

9.2.2.2

–

CSG Membership Info

0..1

YES

reject

>CSG Membership Status

M

9.2.1.73

–

>CSG Id

M

9.2.1.62

–

>Cell Access Mode

O

9.2.1.74

–

>PLMN Identity

O

9.2.3.8

–

Tunnel Information for BBF

O

Tunnel Information 9.2.2.3

Indicating HeNB’s Local IP Address assigned by the broadband access provider, UDP port Number.

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

User Location Information

O

9.2.1.93

Yes

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.3.9 E-RAB MODIFICATION CONFIRM

This message is sent by the MME and is used to report the outcome of the request from the E-RAB MODIFICATION INDICATION message.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Modify List

0..1

YES

ignore

>E-RAB Modify Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

E-RAB Failed to Modify List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in the E-RAB MODIFICATION CONFIRM message.

YES

ignore

E-RAB To Be Released List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in the E-RAB MODIFICATION CONFIRM message.

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

CSG Membership Status

O

9.2.1.73

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.4 Context Management Messages

9.1.4.1 INITIAL CONTEXT SETUP REQUEST

This message is sent by the MME to request the setup of a UE context.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Aggregate Maximum Bit Rate

M

9.2.1.20

YES

reject

E-RAB to Be Setup List

1

YES

reject

>E-RAB to Be Setup Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>E-RAB Level QoS Parameters

M

9.2.1.15

Includes necessary QoS parameters.

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

–

>>NAS-PDU

O

9.2.3.5

–

>>Correlation ID

O

9.2.1.80

YES

ignore

>>SIPTO Correlation ID

O

Correlation ID

9.2.1.80

YES

ignore

>>Bearer Type

O

9.2.1.116

YES

reject

>>Ethernet Type

O

9.2.1.147

YES

ignore

>>Security Indication

O

9.2.1.163

YES

reject

UE Security Capabilities

M

9.2.1.40

YES

reject

Security Key

M

9.2.1.41

The KeNB is provided after the key-generation in the MME, see TS 33.401 [15].

YES

reject

Trace Activation

O

9.2.1.4

YES

ignore

Handover Restriction List

O

9.2.1.22

YES

ignore

UE Radio Capability

O

9.2.1.27

YES

ignore

Subscriber Profile ID for RAT/Frequency priority

O

9.2.1.39

YES

ignore

CS Fallback Indicator

O

9.2.3.21

YES

reject

SRVCC Operation Possible

O

9.2.1.58

YES

ignore

CSG Membership Status

O

9.2.1.73

YES

ignore

Registered LAI

O

9.2.3.1

YES

ignore

GUMMEI

O

9.2.3.9

This IE indicates the MME serving the UE.

YES

ignore

MME UE S1AP ID 2

O

9.2.3.3

This IE indicates the MME UE S1AP ID assigned by the MME.

YES

ignore

Management Based MDT Allowed

O

9.2.1.83

YES

ignore

Management Based MDT PLMN List

O

MDT PLMN List

9.2.1.89

YES

ignore

Additional CS Fallback Indicator

C-ifCSFBhighpriority

9.2.3.37

YES

ignore

Masked IMEISV

O

9.2.3.38

YES

ignore

Expected UE Behaviour

O

9.2.1.96

YES

ignore

ProSe Authorized

O

9.2.1.99

YES

ignore

UE User Plane CIoT Support Indicator

O

9.2.1.113

YES

ignore

V2X Services Authorized

O

9.2.1.120

YES

ignore

UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.122

This IE applies only if the UE is authorized for V2X services.

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

CE-mode-B Restricted

O

9.2.1.129

YES

ignore

Aerial UE subscription information

O

9.2.1.136

YES

ignore

Pending Data Indication

O

9.2.3.55

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

Additional RRM Policy Index

O

9.2.1.39a

YES

ignore

IAB Authorized

O

9.2.1.146

YES

ignore

NR V2X Services Authorized

O

9.2.1.148

YES

ignore

NR UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.149

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

PC5 QoS Parameters

O

9.2.1.150

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

Condition

Explanation

ifCSFBhighpriority

This IE shall be present if the CS Fallback Indicator IE is set to “CS Fallback High Priority”.

9.1.4.2 Void

9.1.4.3 INITIAL CONTEXT SETUP RESPONSE

This message is sent by the eNB to confirm the setup of a UE context.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Setup List

1

YES

ignore

>E-RAB Setup Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

–

E-RAB Failed to Setup List

O

E-RAB List
9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB Setup List IE and E-RAB Failed to Setup List IE.

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.4.4 INITIAL CONTEXT SETUP FAILURE

This message is sent by the eNB to indicate that the setup of the UE context was unsuccessful.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.5 UE CONTEXT RELEASE REQUEST

This message is sent by the eNB to request the release of the UE-associated S1-logical connection over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Cause

M

9.2.1.3

YES

ignore

GW Context Release Indication

O

9.2.1.84

YES

reject

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

9.1.4.6 UE CONTEXT RELEASE COMMAND

This message is sent by the MME to request the release of the UE-associated S1-logical connection over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

CHOICE UE S1AP IDs

M

YES

reject

>UE S1AP ID pair

>>UE S1AP ID pair

M

9.2.3.18

>MME UE S1AP ID

>>MME UE S1AP ID

M

9.2.3.3

Cause

M

9.2.1.3

YES

ignore

9.1.4.7 UE CONTEXT RELEASE COMPLETE

This message is sent by the eNB to confirm the release of the UE-associated S1-logical connection over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

User Location Information

O

9.2.1.93

YES

ignore

Information on Recommended Cells and eNBs for Paging

O

9.2.1.105

YES

ignore

Cell Identifier and Coverage Enhancement Level

O

9.2.1.109

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

Time Since Secondary Node Release

O

9.2.1.143

Yes

ignore

9.1.4.8 UE CONTEXT MODIFICATION REQUEST

This message is sent by the MME to provide UE Context information changes to the eNB.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Security Key

O

9.2.1.41

A fresh KeNB is provided after performing a key-change on the fly procedure in the MME, see TS 33.401 [15].

YES

reject

Subscriber Profile ID for RAT/Frequency priority

O

9.2.1.39

YES

ignore

UE Aggregate Maximum Bit Rate

O

9.2.1.20

YES

ignore

CS Fallback Indicator

O

9.2.3.21

YES

reject

UE Security Capabilities

O

9.2.1.40

YES

reject

CSG Membership Status

O

9.2.1.73

YES

ignore

Registered LAI

O

9.2.3.1

YES

ignore

Additional CS Fallback Indicator

C-ifCSFBhighpriority

9.2.3.37

YES

ignore

ProSe Authorized

O

9.2.1.99

YES

ignore

SRVCC Operation Possible

O

9.2.1.58

YES

ignore

SRVCC Operation Not Possible

O

9.2.1.119

YES

ignore

V2X Services Authorized

O

9.2.1.120

YES

ignore

UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.122

This IE applies only if the UE is authorized for V2X services.

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

Aerial UE subscription information

O

9.2.1.136

YES

ignore

Additional RRM Policy Index

O

9.2.1.39a

YES

ignore

IAB Authorized

O

9.2.1.146

YES

ignore

NR V2X Services Authorized

O

9.2.1.148

YES

ignore

NR UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.149

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

PC5 QoS Parameters

O

9.2.1.150

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

Condition

Explanation

ifCSFBhighpriority

This IE shall be present if the CS Fallback Indicator IE is set to “CS Fallback High Priority”.

9.1.4.9 UE CONTEXT MODIFICATION RESPONSE

This message is sent by the eNB to confirm the performed UE context updates.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.10 UE CONTEXT MODIFICATION FAILURE

This message is sent by the eNB in case the performed UE context update is not successful.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.11 UE RADIO CAPABILITY MATCH REQUEST

This message is sent by the MME to request the compatibility between the UE radio capabilities and network configuration.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Radio Capability

O

9.2.1.27

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

9.1.4.12 UE RADIO CAPABILITY MATCH RESPONSE

This message is sent by the eNB to report the compatibility between the UE radio capabilities and network configuration.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Voice Support Match Indicator

M

9.2.1.85

YES

reject

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.13 UE CONTEXT MODIFICATION INDICATION

This message is sent by the eNB to request the MME to modify the UE Context information.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

CSG Membership Info

0..1

YES

reject

>CSG Membership Status

M

9.2.1.73

–

>CSG Id

M

9.2.1.62

–

>Cell Access Mode

O

9.2.1.74

–

>PLMN Identity

O

9.2.3.8

–

9.1.4.14 UE CONTEXT MODIFICATION CONFIRM

This message is sent by the MME to confirm the modification of the UE Context information.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

CSG Membership Status

O

9.2.1.73

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.15 UE CONTEXT SUSPEND REQUEST

This message is sent by the eNB to request the MME to suspend the UE context and the related bearer contexts.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Information on Recommended Cells and eNBs for Paging

O

9.2.1.105

YES

ignore

Cell Identifier and Coverage Enhancement Level

O

9.2.1.109

YES

ignore

Secondary RAT Usage Report List

O

9.2.1.124

Yes

ignore

User Location Information

O

9.2.1.93

YES

ignore

Time Since Secondary Node Release

O

9.2.1.143

Yes

ignore

9.1.4.16 UE CONTEXT SUSPEND RESPONSE

This message is sent by the MME to indicate to the eNB the UE context and the related bearer contexts have been suspended.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Security Context

O

9.2.1.26

YES

reject

9.1.4.17 UE CONTEXT RESUME REQUEST

This message is sent by the eNB to request the MME to indicate that the suspended RRC connection has been resumed, or the UE accesses for early data transmission.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-RAB Failed To Resume List

0..1

YES

reject

>E-RAB Failed To Resume Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Cause

M

9.2.1.3

–

RRC Resume Cause

O

RRC Establishment Cause

9.2.1.3a

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.4.18 UE CONTEXT RESUME RESPONSE

This message is sent by the MME to indicate to the eNB that the UE context and the related bearer contexts have been resumed in the EPC.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

E-RAB Failed To Resume List

0..1

YES

reject

>E-RAB Failed To Resume Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Cause

M

9.2.1.3

–

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Security Context

O

9.2.1.26

YES

reject

Pending Data Indication

O

9.2.3.55

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RAB allowed towards one UE, the maximum value is 256.

9.1.4.19 UE CONTEXT RESUME FAILURE

This message is sent by the MME to indicate to the eNB that resumption of the UE context and the related bearer contexts has failed in the EPC.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.4.20 CONNECTION ESTABLISHMENT INDICATION

This message is sent by the MME to complete the establishment of the UE-associated logical S1-connection.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

UE Radio Capability

O

9.2.1.27

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

DL CP Security Information

O

9.2.3.49

YES

ignore

CE-Mode-B Restricted

O

9.2.1.129

YES

ignore

End Indication

O

9.2.3.54

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

UE Level QoS Parameters

O

E-RAB Level QoS Parameters 9.2.1.15

Includes QoS parameters.

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

Masked IMEISV

O

9.2.3.38

YES

ignore

9.1.4.21 RETRIEVE UE INFORMATION

The message is sent by the eNB to request UE information over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

S-TMSI

M

9.2.3.6

YES

reject

9.1.4.22 UE INFORMATION TRANSFER

The message is sent by the MME to transfer UE information over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

S-TMSI

M

9.2.3.6

YES

reject

UE Level QoS Parameters

O

E-RAB Level QoS Parameters 9.2.1.15

Includes QoS parameters.

YES

ignore

UE Radio Capability

O

9.2.1.27

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

Pending Data Indication

O

9.2.3.55

YES

ignore

Masked IMEISV

O

9.2.3.38

YES

ignore

9.1.4.23 eNB CP RELOCATION INDICATION

This message is sent by the eNB to initiate the establishment of a UE-associated logical S1-connection, following the reception of re-establishment request as described in TS. 36.300 [14].

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

S-TMSI

M

9.2.3.6

YES

reject

E-UTRAN CGI

M

9.2.1.38

YES

ignore

TAI

M

9.2.3.16

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

ignore

UL CP Security Information

M

9.2.3.50

YES

reject

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

9.1.4.24 MME CP RELOCATION INDICATION

This message is sent by the MME to inform the eNB that the UE is to be relocated as described in TS. 36.300 [14].

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

9.1.5 Handover Signalling Messages

9.1.5.1 HANDOVER REQUIRED

This message is sent by the source eNB to the MME to request the preparation of resources at the target.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Handover Type

M

9.2.1.13

YES

reject

Cause

M

9.2.1.3

YES

ignore

Target ID

M

9.2.1.6

YES

reject

Direct Forwarding Path Availability

O

9.2.3.15

YES

ignore

SRVCC HO Indication

O

9.2.1.59

YES

reject

Source to Target Transparent Container

M

9.2.1.56

YES

reject

Source to Target Transparent Container Secondary

O

Source to Target Transparent Container 9.2.1.56

YES

reject

MS Classmark 2

C-

ifSRVCCtoGERAN

9.2.1.64

YES

reject

MS Classmark 3

C-

ifSRVCCtoGERAN

9.2.1.65

YES

ignore

CSG Id

O

9.2.1.62

YES

reject

Cell Access Mode

O

9.2.1.74

YES

reject

PS Service Not Available

O

9.2.1.77

YES

ignore

Condition

Explanation

ifSRVCCtoGERAN

This IE shall be present if the Handover Type IE is set to the “Value” LTEtoGERAN and the SRVCC HO Indication IE is present.

9.1.5.2 HANDOVER COMMAND

This message is sent by the MME to inform the source eNB that resources for the handover have been prepared at the target side.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Handover Type

M

9.2.1.13

YES

reject

NAS Security Parameters from E-UTRAN

C-iftoUTRANGERAN

9.2.3.30

The eNB shall use this IE as specified in TS 33.401 [15].

YES

reject

E-RABs Subject to Forwarding List

0..1

YES

ignore

>E-RABs Subject to Forwarding Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>DL Transport Layer Address

O

9.2.2.1

–

>>DL GTP-TEID

O

9.2.2.2

To deliver forwarded DL PDCP SDUs.

–

>>UL Transport Layer Address

O

9.2.2.1

–

>>UL GTP-TEID

O

9.2.2.2

To deliver forwarded UL PDCP SDUs.

–

E-RABs to Release List

O

E-RAB List

9.2.1.36

YES

ignore

Target to Source Transparent Container

M

9.2.1.57

YES

reject

Target to Source Transparent Container Secondary

O

Target to Source Transparent Container 9.2.1.57

YES

reject

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Condition

Explanation

iftoUTRANGERAN

This IE shall be present if the Handover Type IE is set to the value “LTEtoUTRAN “ or “LTEtoGERAN”.

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.5.3 HANDOVER PREPARATION FAILURE

This message is sent by the MME to inform the source eNB that the Handover Preparation has failed.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.5.4 HANDOVER REQUEST

This message is sent by the MME to the target eNB to request the preparation of resources.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

Handover Type

M

9.2.1.13

YES

reject

Cause

M

9.2.1.3

YES

ignore

UE Aggregate Maximum Bit Rate

M

9.2.1.20

YES

reject

E-RABs To Be Setup List

1

YES

reject

>E-RABs To Be Setup Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

To deliver UL PDUs.

–

>>E-RAB Level QoS Parameters

M

9.2.1.15

Includes necessary QoS parameters.

–

>>Data Forwarding Not Possible

O

9.2.1.76

YES

ignore

>>Bearer Type

O

9.2.1.116

YES

reject

>>Ethernet Type

O

9.2.1.147

YES

ignore

>>Security Indication

O

9.2.1.163

YES

reject

Source to Target Transparent Container

M

9.2.1.56

YES

reject

UE Security Capabilities

M

9.2.1.40

YES

reject

Handover Restriction List

O

9.2.1.22

YES

ignore

Trace Activation

O

9.2.1.4

YES

ignore

Request Type

O

9.2.1.34

YES

ignore

SRVCC Operation Possible

O

9.2.1.58

YES

ignore

Security Context

M

9.2.1.26

YES

reject

NAS Security Parameters to E-UTRAN

C-iffromUTRANGERAN

9.2.3.31

The eNB shall use this IE as specified in TS 33.401 [15].

YES

reject

CSG Id

O

9.2.1.62

YES

reject

CSG Membership Status

O

9.2.1.73

YES

ignore

GUMMEI

O

9.2.3.9

This IE indicates the MME serving the UE.

YES

ignore

MME UE S1AP ID 2

O

9.2.3.3

This IE indicates the MME UE S1AP ID assigned by the MME.

YES

ignore

Management Based MDT Allowed

O

9.2.1.83

YES

ignore

Management Based MDT PLMN List

O

MDT PLMN List

9.2.1.89

YES

ignore

Masked IMEISV

O

9.2.3.38

YES

ignore

Expected UE Behaviour

O

9.2.1.96

YES

ignore

ProSe Authorized

O

9.2.1.99

YES

ignore

UE User Plane CIoT Support Indicator

O

9.2.1.113

YES

ignore

V2X Services Authorized

O

9.2.1.120

YES

ignore

UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.122

This IE applies only if the UE is authorized for V2X services.

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

CE-mode-B Restricted

O

9.2.1.129

YES

ignore

Aerial UE subscription information

O

9.2.1.136

YES

ignore

Pending Data Indication

O

9.2.3.55

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

Additional RRM Policy Index

O

9.2.1.39a

YES

ignore

IAB Authorized

O

9.2.1.146

YES

reject

NR V2X Services Authorized

O

9.2.1.148

YES

ignore

NR UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.149

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

PC5 QoS Parameters

O

9.2.1.150

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

Condition

Explanation

C-iffromUTRANGERAN

This IE shall be present if the Handover Type IE is set to the value “UTRANtoLTE” or “GERANtoLTE”.

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.5.5 HANDOVER REQUEST ACKNOWLEDGE

This message is sent by the target eNB to inform the MME about the prepared resources at the target.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

Allocated at the target eNB.

YES

ignore

E-RABs Admitted List

1

YES

ignore

>E-RABs Admitted Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

To deliver DL PDUs.

–

>>DL Transport Layer Address

O

9.2.2.1

–

>>DL GTP-TEID

O

9.2.2.2

To deliver forwarded DL PDCP SDUs.

–

>>UL Transport Layer Address

O

9.2.2.1

–

>>UL GTP-TEID

O

9.2.2.2

To deliver forwarded UL PDCP SDUs.

–

E-RABs Failed to Setup List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RABs Admitted List IE and E-RABs Failed to Setup List IE.

YES

ignore

Target to Source Transparent Container

M

9.2.1.57

YES

reject

CSG Id

O

9.2.1.62

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Cell Access Mode

O

9.2.1.74

YES

ignore

CE-mode-B Support Indicator

O

9.2.1.118

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.5.6 HANDOVER FAILURE

This message is sent by the target eNB to inform the MME that the preparation of resources has failed.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.5.7 HANDOVER NOTIFY

This message is sent by the target eNB to inform the MME that the UE has been identified in the target cell and the S1 handover has been completed.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-UTRAN CGI

M

9.2.1.38

YES

ignore

TAI

M

9.2.3.16

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

ignore

Tunnel Information for BBF

O

Tunnel Information 9.2.2.3

Indicating HeNB’s Local IP Address assigned by the broadband access provider, UDP port Number.

YES

ignore

LHN ID

O

9.2.1.92

YES

ignore

PSCell Information

O

9.2.1.141

YES

ignore

Notify Source eNB

O

ENUMERATED (NotifySource, …)

YES

ignore

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

9.1.5.8 PATH SWITCH REQUEST

This message is sent by the eNB to request the MME to switch DL GTP tunnel termination point(s) from one end-point to another.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-RAB To Be Switched in Downlink List

1

YES

reject

>E-RABs Switched in Downlink Item IEs

1 .. <maxnoofE-RABs>

EACH

reject

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

To deliver DL PDUs.

–

>>Security Indication

O

9.2.1.163

YES

ignore

Source MME UE S1AP ID

M

9.2.3.3

YES

reject

E-UTRAN CGI

M

9.2.1.38

YES

ignore

TAI

M

9.2.3.16

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

ignore

UE Security Capabilities

M

9.2.1.40

YES

ignore

CSG Id

O

9.2.1.62

YES

ignore

Cell Access Mode

O

9.2.1.74

YES

ignore

Source MME GUMMEI

O

9.2.3.9

YES

ignore

CSG Membership Status

O

9.2.1.73

YES

ignore

Tunnel Information for BBF

O

Tunnel Information 9.2.2.3

Indicating HeNB’s Local IP Address assigned by the broadband access provider, UDP port Number.

YES

ignore

LHN ID

O

9.2.1.92

YES

ignore

RRC Resume Cause

O

RRC Establishment Cause

9.2.1.3a

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

PSCell Information

O

9.2.1.141

YES

ignore

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.5.9 PATH SWITCH REQUEST ACKNOWLEDGE

This message is sent by the MME to inform the eNB that the path switch has been successfully completed in the EPC.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

UE Aggregate Maximum Bit Rate

O

9.2.1.20

YES

ignore

E-RAB To Be Switched in Uplink List

0..1

YES

ignore

>E-RABs Switched in Uplink Item IEs

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>Transport Layer Address

M

9.2.2.1

–

>>GTP-TEID

M

9.2.2.2

–

E-RAB To Be Released List

O

E-RAB List

9.2.1.36

A value for E-RAB ID shall only be present once in E-RAB To Be Switched in Uplink List IE and E-RAB to Be Released List IE.

YES

ignore

Security Context

M

9.2.1.26

One pair of {NCC, NH} is provided.

YES

reject

Criticality Diagnostics

O

9.2.1.21

YES

ignore

MME UE S1AP ID 2

O

9.2.3.3

This IE indicates the MME UE S1AP ID assigned by the MME.

YES

ignore

CSG Membership Status

O

9.2.1.73

YES

ignore

ProSe Authorized

O

9.2.1.99

YES

ignore

UE User Plane CIoT Support Indicator

O

9.2.1.113

YES

ignore

V2X Services Authorized

O

9.2.1.120

YES

ignore

UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.122

This IE applies only if the UE is authorized for V2X services.

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

CE-mode-B Restricted

O

9.2.1.129

YES

ignore

Aerial UE subscription information

O

9.2.1.136

YES

ignore

Pending Data Indication

O

9.2.3.55

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

Handover Restriction List

O

9.2.1.22

YES

ignore

Additional RRM Policy Index

O

9.2.1.39a

YES

ignore

NR V2X Services Authorized

O

9.2.1.148

YES

ignore

NR UE Sidelink Aggregate Maximum Bit Rate

O

9.2.1.149

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

PC5 QoS Parameters

O

9.2.1.150

This IE applies only if the UE is authorized for NR V2X services.

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

UE Security Capabilities

O

9.2.1.40

YES

ignore

E-RAB To Be Updated List

0..1

YES

ignore

>E-RAB To Be Updated Item

1 .. <maxnoofE-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>Security Indication

O

9.2.1.163

–

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.5.10 PATH SWITCH REQUEST FAILURE

This message is sent by the MME to inform the eNB that a failure has occurred in the EPC during the Path switch request procedure.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Cause

M

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.5.11 HANDOVER CANCEL

This message is sent by the source eNB to the MME to request the cancellation of an ongoing handover.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Cause

M

9.2.1.3

YES

ignore

9.1.5.12 HANDOVER CANCEL ACKNOWLEDGE

This message is sent by the MME to the source eNB to confirm that the ongoing handover was cancelled.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.5.13 eNB STATUS TRANSFER

This message is sent by the source eNB to transfer the PDCP SN receiver and transmitter status.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

eNB Status Transfer Transparent Container

M

9.2.1.31

YES

reject

9.1.5.14 MME STATUS TRANSFER

This message is sent by the MME to transfer the PDCP-SN receiver and transmitter status.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

eNB Status Transfer Transparent Container

M

9.2.1.31

YES

reject

9.1.5.15 HANDOVER SUCCESS

This message is sent by the MME to the source eNB to indicate the successful access of the UE toward the target eNB.

Direction: MME →source eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

9.1.5.16 eNB EARLY STATUS TRANSFER

This message is sent by the source eNB to transfer the COUNT value(s) of the first forwarded downlink SDU(s) during S1 DAPS Handover.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

eNB Early Status Transfer Transparent Container

M

9.2.1.157

YES

reject

9.1.5.17 MME EARLY STATUS TRANSFER

This message is sent by the MME to transfer the COUNT value(s) of the first forwarded downlink SDU(s) during S1 DAPS Handover.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

eNB Early Status Transfer Transparent Container

M

9.2.1.157

YES

reject

9.1.6 PAGING

This message is sent by the MME and is used to page a UE in one or several tracking areas.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

UE Identity Index value

M

9.2.3.10

YES

ignore

UE Paging Identity

M

9.2.3.13

YES

ignore

Paging DRX

O

9.2.1.16

If the NB-IoT Paging DRX IE is included, the Paging DRX IE is ignored.

YES

ignore

CN Domain

M

9.2.3.22

YES

ignore

List of TAIs

1

YES

ignore

>TAI List Item

1 .. <maxnoofTAIs>

EACH

ignore

>>TAI

M

9.2.3.16

–

CSG Id List

0..1

GLOBAL

ignore

>CSG Id

1 .. <maxnoofCSGId>

9.2.1.62

–

Paging Priority

O

9.2.1.78

YES

ignore

UE Radio Capability for Paging

O

9.2.1.98

YES

ignore

Assistance Data for Paging

O

9.2.1.103

YES

ignore

Paging eDRX Information

O

9.2.1.111

YES

ignore

Extended UE Identity Index Value

O

9.2.3.46

YES

ignore

NB-IoT Paging eDRX Information

O

9.2.1.115

YES

ignore

NB-IoT UE Identity Index value

O

9.2.3.47

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

CE-Mode-B Restricted

O

9.2.1.129

YES

ignore

Data size

O

INTEGER (1..4095, …)

The unit is: bit

YES

ignore

WUS Assistance Information

O

9.2.1.158

YES

ignore

NB-IoT Paging DRX

O

9.2.1.159x

YES

ignore

Paging Cause

O

ENUMERATED (voice, …)

YES

ignore

Range bound

Explanation

maxnoofTAIs

Maximum no. of TAIs. Value is 256.

maxnoofCSGIds

Maximum no. of CSG Ids within the CSG Id List. Value is 256.

9.1.7 NAS Transport Messages

9.1.7.1 INITIAL UE MESSAGE

This message is sent by the eNB to transfer the initial layer 3 message to the MME over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

reject

NAS-PDU

M

9.2.3.5

YES

reject

TAI

M

9.2.3.16

Indicating the Tracking Area from which the UE has sent the NAS message.

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

reject

E-UTRAN CGI

M

9.2.1.38

Indicating the E-UTRAN CGI from which the UE has sent the NAS message.

YES

ignore

RRC Establishment Cause

M

9.2.1.3a

YES

ignore

S-TMSI

O

9.2.3.6

YES

reject

CSG Id

O

9.2.1.62

YES

reject

GUMMEI

O

9.2.3.9

YES

reject

Cell Access Mode

O

9.2.1.74

YES

reject

GW Transport Layer Address

O

Transport Layer Address 9.2.2.1

Indicating GW Transport Layer Address if the GW is collocated with eNB.

YES

ignore

Relay Node Indicator

O

9.2.1.79

Indicating a relay node.

YES

reject

GUMMEI Type

O

ENUMERATED (native, mapped, …, mappedFrom5G)

YES

ignore

Tunnel Information for BBF

O

Tunnel Information 9.2.2.3

Indicating HeNB’s Local IP Address assigned by the broadband access provider, UDP port Number.

YES

ignore

SIPTO L-GW Transport Layer Address

O

Transport Layer Address 9.2.2.1

Indicating SIPTO L-GW Transport Layer Address if the SIPTO L-GW is collocated with eNB.

YES

ignore

LHN ID

O

9.2.1.92

YES

ignore

MME Group ID

O

9.2.3.44

YES

ignore

UE Usage Type

O

INTEGER (0..255)

YES

ignore

CE-mode-B Support Indicator

O

9.2.1.118

YES

ignore

DCN ID

O

INTEGER (0..65535)

YES

ignore

Coverage Level

O

ENUMERATED (extendedcoverage, …)

YES

ignore

UE Application Layer Measurement Capability

O

BIT STRING (SIZE(8))

Each bit in the bitmap indicates an UE Application layer measurement capability, refer to TS 36.331 [16].

Bit 0 = QoE Measurement for streaming service

Bit 1 = QoE Measurement for MTSI service

Value ‘1’ indicates “Capable” and value ‘0’ indicates “not Capable”.

Unused bits are reserved for future use.

YES

ignore

EDT Session

O

ENUMERATED (true, …)

YES

IAB Node Indication

O

ENUMERATED (true, …)

Indication of an IAB-node.

YES

reject

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

9.1.7.2 DOWNLINK NAS TRANSPORT

This message is sent by the MME and is used for carrying NAS information over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

NAS-PDU

M

9.2.3.5

YES

reject

Handover Restriction List

O

9.2.1.22

YES

ignore

Subscriber Profile ID for RAT/Frequency priority

O

9.2.1.39

YES

ignore

SRVCC Operation Possible

O

9.2.1.58

YES

ignore

UE Radio Capability

O

9.2.1.27

YES

ignore

DL NAS PDU Delivery Acknowledgment Request

O

9.2.3.48

YES

ignore

Enhanced Coverage Restricted

O

9.2.1.123

YES

ignore

CE-mode-B Restricted

O

9.2.1.129

YES

ignore

NR UE Security Capabilities

O

9.2.1.127

YES

ignore

UE Capability Info Request

O

9.2.3.51

YES

ignore

End Indication

O

9.2.3.54

YES

ignore

Pending Data Indication

O

9.2.3.55

YES

ignore

Subscription Based UE Differentiation Information

O

9.2.1.140

YES

ignore

Additional RRM Policy Index

O

9.2.1.39a

YES

ignore

UE Radio Capability ID

O

9.2.1.153

YES

reject

Masked IMEISV

O

9.2.3.38

YES

ignore

9.1.7.3 UPLINK NAS TRANSPORT

This message is sent by the eNB and is used for carrying NAS information over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

NAS-PDU

M

9.2.3.5

YES

reject

E-UTRAN CGI

M

9.2.1.38

YES

ignore

TAI

M

9.2.3.16

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

ignore

GW Transport Layer Address

O

Transport Layer Address 9.2.2.1

Indicating GW Transport Layer Address if the GW is collocated with eNB.

YES

ignore

SIPTO L-GW Transport Layer Address

O

Transport Layer Address 9.2.2.1

Indicating SIPTO L-GW Transport Layer Address if the SIPTO L-GW is collocated with eNB.

YES

ignore

LHN ID

O

9.2.1.92

YES

ignore

PSCell Information

O

9.2.1.141

YES

ignore

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

9.1.7.4 NAS NON DELIVERY INDICATION

This message is sent by the eNB and is used for reporting the non delivery of a NAS PDU previously received within a DOWNLINK NAS TRANSPORT message over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

NAS-PDU

M

9.2.3.5

YES

ignore

Cause

M

9.2.1.3

YES

ignore

9.1.7.4a NAS DELIVERY INDICATION

This message is sent by the eNB and is used for reporting the successful delivery of a NAS PDU to the UE that was previously received within a DOWNLINK NAS TRANSPORT message.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

9.1.7.5 REROUTE NAS REQUEST

This message is sent by the MME in order to request for a rerouting of the INITIAL UE MESSAGE to a DCN.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

MME UE S1AP ID

O

9.2.3.3

YES

ignore

S1 Message

M

OCTET STRING

Contains the INITIAL UE MESSAGE

YES

reject

MME Group ID

M

9.2.3.44

YES

reject

Additional GUTI

O

9.2.3.45

YES

ignore

UE Usage Type

O

INTEGER (0..255)

YES

ignore

9.1.8 Management messages

9.1.8.1 RESET

This message is sent by both the MME and the eNB and is used to request that the S1 interface, or parts of the S1 interface, to be reset.

Direction: MME → eNB and eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Cause

M

9.2.1.3

YES

ignore

CHOICE Reset Type

M

YES

reject

>S1 interface

>>Reset All

M

ENUMERATED (Reset all,…)

–

>Part of S1 interface

>>UE-associated logical S1-connection list

1

–

>>>UE-associated logical S1-connection Item

1 .. <maxnoofIndividualS1ConnectionsToReset>

EACH

reject

>>>>MME UE S1AP ID

O

9.2.3.3

–

>>>>eNB UE S1AP ID

O

9.2.3.4

–

Range bound

Explanation

maxnoofIndividualS1ConnectionsToReset

Maximum no. of UE-associated logical S1-connections allowed to reset in one message. Value is 256.

9.1.8.2 RESET ACKNOWLEDGE

This message is sent by both the MME and the eNB as a response to a RESET message.

Direction: eNB → MME and MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

UE-associated logical S1-connection list

0..1

YES

ignore

>UE-associated logical S1-connection Item

1 .. <maxnoofIndividualS1ConnectionsToReset>

EACH

ignore

>>MME UE S1AP ID

O

9.2.3.3

–

>>eNB UE S1AP ID

O

9.2.3.4

–

Criticality Diagnostics

O

9.2.1.21

YES

ignore

Range bound

Explanation

maxnoofIndividualS1ConnectionsToReset

Maximum no. of UE-associated logical S1-connections allowed to reset in one message. Value is 256.

9.1.8.3 ERROR INDICATION

This message is sent by both the MME and the eNB and is used to indicate that some error has been detected in the node.

Direction: MME → eNB and eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

O

9.2.3.3

YES

ignore

eNB UE S1AP ID

O

9.2.3.4

YES

ignore

Cause

O

9.2.1.3

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

S-TMSI

O

9.2.3.6

YES

ignore

9.1.8.4 S1 SETUP REQUEST

This message is sent by the eNB to transfer information for a TNL association.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Global eNB ID

M

9.2.1.37

YES

reject

eNB Name

O

PrintableString(SIZE(1..150,…))

YES

ignore

Supported TAs

1..<maxnoofTACs>

Supported TAs in the eNB.

GLOBAL

reject

>TAC

M

9.2.3.7

Broadcast TAC.

–

>Broadcast PLMNs

1..<maxnoofBPLMNs>

Broadcast PLMNs.

–

>>PLMN Identity

M

9.2.3.8

>RAT-Type

O

9.2.1.117

RAT-Type associated with the TAC of the indicated PLMN(s).

YES

reject

Default Paging DRX

M

9.2.1.16

YES

ignore

CSG Id List

0..1

GLOBAL

reject

>CSG Id

1 .. <maxnoofCSGIds>

9.2.1.62

UE Retention Information

O

9.2.1.112

YES

ignore

NB-IoT Default Paging DRX

O

9.2.1.114

YES

ignore

Connected en-gNB List

<0.. maxnoofConnecteden-gNBs>

GLOBAL

ignore

>en-gNB ID

M

BIT STRING (SIZE(22..32))

The MME derives the Global en-gNB ID based on the en-gNB ID IE and the first PLMN Identity in the Supported TAs list for the en-gNB.

>Supported TAs

1..<maxnoofTACs>

Supported (EPS) TAs in the en-gNB.

–

>>Configured TAC

M

TAC

9.2.3.7

This information is used as specified in TS 36.300 [14].

–

>>Broadcast PLMNs

1..<maxnoofBPLMNs>

Broadcast PLMNs.

–

>>>PLMN Identity

M

9.2.3.8

Range bound

Explanation

maxnoofTACs

Maximum no. of TACs. Value is 256.

maxnoofBPLMNs

Maximum no. of Broadcast PLMNs. Value is 6.

maxnoofCSGIds

Maximum no. of CSG Ids within the CSG Id List. Value is 256.

maxnoofConnecteden-gNBs

Maximum no. of en-gNBs connected to the eNB. Value is 256.

9.1.8.5 S1 SETUP RESPONSE

This message is sent by the MME to transfer information for a TNL association.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME Name

O

PrintableString(SIZE(1..150,…))

YES

ignore

Served GUMMEIs

1..<maxnoofRATs>

The LTE related pool configuration is included on the first place in the list.

GLOBAL

reject

>Served PLMNs

1..<maxnoofPLMNsPerMME>

–

>>PLMN Identity

M

9.2.3.8

–

>Served GroupIDs

1..<maxnoofGroupIDs>

–

>>MME Group ID

M

OCTET STRING (SIZE(2))

–

>Served MMECs

1..<maxnoofMMECs>

–

>>MME Code

M

9.2.3.12

–

>GUMMEI Type

O

ENUMERATED (native, mapped, …, mappedFrom5G)

–

ignore

Relative MME Capacity

M

9.2.3.17

YES

ignore

MME Relay Support Indicator

O

9.2.1.82

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

UE Retention Information

O

9.2.1.112

YES

ignore

Served DCNs

0..<maxnoofDCNs>

GLOBAL

ignore

>Served DCNs Items

M

9.2.1.121

–

IAB Supported

O

ENUMERATED (true, …)

Indication of support for IAB.

YES

ignore

Range bound

Explanation

maxnoofPLMNsPerMME

Maximum no. of PLMNs per MME. Value is 32.

maxnoofRATs

Maximum no. of RATs. Value is 8.

maxnoofGroupIDs

Maximum no. of GroupIDs per node per RAT. Value is 65535.

maxnoofMMECs

Maximum no. of MMECs per node per RAT. Value is 256.

maxnoofDCNs

Maximum no. of DCNs servered by one MME. Value is 32.

9.1.8.6 S1 SETUP FAILURE

This message is sent by the MME to indicate S1 Setup failure.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Cause

M

9.2.1.3

YES

ignore

Time to wait

O

9.2.1.61

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.8.7 ENB CONFIGURATION UPDATE

This message is sent by the eNB to transfer updated information for a TNL association.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

eNB Name

O

PrintableString(SIZE(1..150,…))

YES

ignore

Supported TAs

0..<maxnoofTACs>

Supported TAs in the eNB.

GLOBAL

reject

>TAC

M

9.2.3.7

Broadcast TAC.

–

>Broadcast PLMNs

1..<maxnoofBPLMNs>

Broadcast PLMNs.

–

>>PLMN Identity

M

9.2.3.8

–

>RAT-Type

O

9.2.1.117

RAT Type associated with the TAC of the indicated PLMN(s).

YES

reject

CSG Id List

0..1

GLOBAL

reject

>CSG Id

1 .. <maxnoofCSGId>

9.2.1.62

–

Default Paging DRX

O

9.2.1.16

YES

ignore

NB-IoT Default Paging DRX

O

9.2.1.114

YES

ignore

Connected en-gNB To Be Added List

<0.. maxnoofConnecteden-gNBs>

GLOBAL

ignore

>en-gNB ID

M

BIT STRING (SIZE(22..32))

The MME derives the Global en-gNB ID based on the en-gNB ID IE and the first PLMN Identity in the Supported TAs list of the added en-gNB.

>Supported TAs

1..<maxnoofTACs>

Supported TAs in the en-gNB.

–

>>Configured TAC

M

TAC

9.2.3.7

–

>>Broadcast PLMNs

1..<maxnoofBPLMNs>

Broadcast PLMNs.

–

>>>PLMN Identity

M

9.2.3.8

Connected en-gNB To Be Removed List

<0.. maxnoofConnecteden-gNBs>

GLOBAL

ignore

>en-gNB ID

M

BIT STRING (SIZE(22..32))

The MME derives the Global en-gNB ID based on the en-gNB ID IE and the first PLMN Identity in the Supported TAs list of the en-gNB to be removed.

>Supported TAs

1..<maxnoofTACs>

Supported TAs in the en-gNB.

–

>>Configured TAC

M

TAC

9.2.3.7

–

>>Broadcast PLMNs

1..<maxnoofBPLMNs>

Broadcast PLMNs.

–

>>>PLMN Identity

M

9.2.3.8

Range bound

Explanation

maxnoofTACs

Maximum no. of TACs. Value is 256.

maxnoofBPLMNs

Maximum no. of Broadcast PLMNs. Value is 6.

maxnoofCSGIds

Maximum no. of CSG Ids within the CSG Id List. Value is 256.

maxnoofConnecteden-gNBs

Maximum no. of en-gNBs connected to the eNB. Value is 256.

9.1.8.8 ENB CONFIGURATION UPDATE ACKNOWLEDGE

This message is sent by the MME to acknowledge the eNB transfer updated information for a TNL association.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.8.9 ENB CONFIGURATION UPDATE FAILURE

This message is sent by the MME to indicate S1 eNB Configuration Update failure.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Cause

M

9.2.1.3

YES

ignore

Time to wait

O

9.2.1.61

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.8.10 MME CONFIGURATION UPDATE

This message is sent by the MME to transfer updated information for a TNL association.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

MME Name

O

PrintableString(SIZE(1..150,…))

YES

ignore

Served GUMMEIs

0..<maxnoofRATs>

The LTE related pool configuration is included on the first place in the list.

GLOBAL

reject

>Served PLMNs

1..<maxnoofPLMNsPerMME>

–

>>PLMN Identity

M

9.2.3.8

–

>Served GroupIDs

1..<maxnoofGroupIDs>

–

>>MME GroupID

M

OCTET STRING (SIZE(2))

–

>Served MMECs

1..<maxnoofMMECs>

–

>>MME Code

M

9.2.3.12

–

>GUMMEI Type

O

ENUMERATED (native, mapped, …, mappedFrom5G)

–

ignore

Relative MME Capacity

O

9.2.3.17

YES

reject

Served DCNs

0..<maxnoofDCNs>

GLOBAL

ignore

>Served DCNs Items

M

9.2.1.121

–

Range bound

Explanation

maxnoofPLMNsPerMME

Maximum no. of PLMNs per MME. Value is 32.

maxnoofRATs

Maximum no. of RATs. Value is 8.

maxnoofGroupIDs

Maximum no. of GroupIDs per node per RAT. Value is 65535.

maxnoofMMECs

Maximum no. of MMECs per node per RAT. Value is 256.

maxnoofDCNs

Maximum no. of DCNs servered by one MME. Value is 32.

9.1.8.11 MME CONFIGURATION UPDATE ACKNOWLEDGE

This message is sent by the eNB to acknowledge the MME transfer updated information for a TNL association.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.8.12 MME CONFIGURATION UPDATE FAILURE

This message is sent by the eNB to indicate S1 MME Configuration Update failure.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Cause

M

9.2.1.3

YES

ignore

Time to wait

O

9.2.1.61

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.8.13 OVERLOAD START

This message is sent by the MME and is used to indicate to the eNB that the MME is overloaded.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

Overload Response

M

9.2.3.19

YES

reject

GUMMEI List

0..1

YES

ignore

>GUMMEI List Item

1..<maxnoofMMECs>

EACH

ignore

>>GUMMEI

M

9.2.3.9

–

Traffic Load Reduction Indication

O

9.2.3.36

YES

ignore

Range bound

Explanation

maxnoofMMECs

Maximum no. of MMECs per node per RAT. Value is 256.

9.1.8.14 OVERLOAD STOP

This message is sent by the MME and is used to indicate that the MME is no longer overloaded.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

GUMMEI List

0..1

YES

ignore

>GUMMEI List Item

1..<maxnoofMMECs>

EACH

ignore

>>GUMMEI

M

9.2.3.9

–

Range bound

Explanation

maxnoofMMECs

Maximum no. of MMECs per node per RAT. Value is 256.

9.1.9 S1 CDMA2000 Tunnelling Messages

9.1.9.1 DOWNLINK S1 CDMA2000 TUNNELLING

This message is sent by the MME and is used for carrying CDMA2000 information over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-RABs Subject to Forwarding List

0..1

YES

ignore

>E-RABs Subject to Forwarding Item IEs

1 .. <maxnoof E-RABs>

EACH

ignore

>>E-RAB ID

M

9.2.1.2

–

>>DL Transport Layer Address

O

9.2.2.1

–

>>DL GTP-TEID

O

9.2.2.2

This IE indicates the tunnel endpoint for forwarding of DL data.

–

>>UL Transport Layer Address

O

9.2.2.1

–

>>UL GTP-TEID

O

9.2.2.2

–

CDMA2000 HO Status

O

9.2.1.28

YES

ignore

CDMA2000 RAT Type

M

9.2.1.24

YES

reject

CDMA2000-PDU

M

9.2.1.23

YES

reject

Range bound

Explanation

maxnoofE-RABs

Maximum no. of E-RABs for one UE. Value is 256.

9.1.9.2 UPLINK S1 CDMA2000 TUNNELLING

This message is sent by the eNB and is used for carrying CDMA2000 information over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

CDMA2000 RAT Type

M

9.2.1.24

YES

reject

CDMA2000 Sector ID

M

9.2.1.25

YES

reject

CDMA2000 HO Required Indication

O

9.2.1.29

YES

ignore

CDMA2000 1xRTT SRVCC Info

O

9.2.1.35

YES

reject

CDMA2000 1xRTT RAND

O

9.2.1.33

YES

reject

CDMA2000-PDU

M

9.2.1.23

YES

reject

E-UTRAN Round Trip Delay Estimation Info

O

9.2.1.69

YES

ignore

9.1.10 UE CAPABILITY INFO INDICATION

This message is sent by the eNB to provide UE Radio Capability information to the MME.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

UE Radio Capability

M

9.2.1.27

YES

ignore

UE Radio Capability for Paging

O

9.2.1.98

YES

ignore

UE Application Layer Measurement Capability

O

BIT STRING (SIZE(8))

Each bit in the bitmap indicates an UE Application layer measurement capability, refer to TS 25.331[10].

Bit 0 = QoE Measurement for streaming service

Bit 1 = QoE Measurement for MTSI service

Value ‘1’ indicates “Capable” and value ‘0’ indicates “not Capable”.

Unused bits are reserved for future use.

YES

ignore

LTE-M Indication

O

9.2.1.135

YES

ignore

UE Radio Capability – NR Format

O

9.2.1.154

YES

ignore

UE Radio Capability for Paging – NR Format

O

9.2.1.160

YES

ignore

9.1.11 Trace Messages

9.1.11.1 TRACE START

This message is sent by the MME to initiate trace recording for a UE.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Trace Activation

M

9.2.1.4

YES

ignore

9.1.11.2 TRACE FAILURE INDICATION

This message is sent by the eNB to indicate that a Trace Start procedure or a Deactivate Trace procedure has failed for a UE.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-UTRAN Trace ID

M

OCTET STRING (SIZE(8))

As per E-UTRAN Trace ID IE in Trace Activation IE (9.2.1.4).

YES

ignore

Cause

M

9.2.1.3

YES

ignore

9.1.11.3 DEACTIVATE TRACE

This message is sent by the MME to deactivate trace.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-UTRAN Trace ID

M

OCTET STRING (SIZE(8))

As per E-UTRAN Trace ID IE in Trace Activation IE (9.2.1.4).

YES

ignore

9.1.12 Location Reporting Messages

9.1.12.1 LOCATION REPORTING CONTROL

This message is sent by the MME and is used to request the eNB to report where the UE is currently located.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Request Type

M

9.2.1.34

YES

ignore

9.1.12.2 LOCATION REPORT FAILURE INDICATION

This message is sent by the eNB and is used to indicate the failure of location report.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Cause

M

9.2.1.3

YES

ignore

9.1.12.3 LOCATION REPORT

This message is sent by the eNB and is used to provide the UE’s location to the MME.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-UTRAN CGI

M

9.2.1.38

YES

ignore

TAI

M

9.2.3.16

In NTN, this IE is used to indicate the single broadcast TAC. This IE shall be ignored if the LTE NTN TAI Information IE is present.

YES

ignore

Request Type

M

9.2.1.34

The Request Type IE is sent as it has been provided.

YES

ignore

PSCell Information

O

9.2.1.141

YES

ignore

LTE NTN TAI Information

O

9.2.3.56

YES

ignore

9.1.13 Warning Message Transmission Messages

9.1.13.1 WRITE-REPLACE WARNING REQUEST

This message is sent by the MME to request the start or overwrite of the broadcast of a warning message.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Message Identifier

M

9.2.1.44

YES

reject

Serial Number

M

9.2.1.45

YES

reject

Warning Area List

O

9.2.1.46

YES

ignore

Repetition Period

M

9.2.1.48

YES

reject

Extended Repetition Period

O

9.2.1.75

YES

reject

Number of Broadcasts Requested

M

9.2.1.49

YES

reject

Warning Type

O

9.2.1.50

YES

ignore

Warning Security Information

O

9.2.1.51

See TS 23.041 [29].

YES

ignore

Data Coding Scheme

O

9.2.1.52

YES

ignore

Warning Message Contents

O

9.2.1.53

YES

ignore

Concurrent Warning Message Indicator

O

9.2.1.72

YES

reject

Warning Area Coordinates

O

9.2.1.139

YES

ignore

9.1.13.2 WRITE-REPLACE WARNING RESPONSE

This message is sent by the eNB to acknowledge the MME on the start or overwrite request of a warning message.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Message Identifier

M

9.2.1.44

YES

reject

Serial Number

M

9.2.1.45

YES

reject

Broadcast Completed Area List

O

9.2.1.54

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.13.3 KILL REQUEST

This message is forwarded by the MME to eNB to cancel an already ongoing broadcast of a warning message

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Message Identifier

M

9.2.1.44

YES

reject

Serial Number

M

9.2.1.45

YES

reject

Warning Area List

O

9.2.1.46

YES

ignore

Kill-all Warning Messages Indicator

O

9.2.1.91

YES

reject

9.1.13.4 KILL RESPONSE

This message is sent by the eNB to indicate the list of warning areas where cancellation of the broadcast of the identified message was successful and unsuccessful.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

Message Identifier

M

9.2.1.44

YES

reject

Serial Number

M

9.2.1.45

YES

reject

Broadcast Cancelled Area List

O

9.2.1.70

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore

9.1.13.5 PWS RESTART INDICATION

This message is sent by the eNB to inform the MME that PWS information for some or all cells of the eNB are available for reloading from the CBC if needed.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

E-CGI List for Restart

1..<maxnoofCellsforRestart>

EACH

reject

>E-CGI

M

9.2.1.38

–

–

Global eNB ID

M

9.2.1.37

YES

reject

TAI List for Restart

1 .. <maxnoofRestartTAIs>

EACH

reject

>TAI

M

9.2.3.16

–

–

Emergency Area ID List for Restart

0 .. <maxnoofRestartEmergencyAreaIDs>

EACH

reject

>Emergency Area ID

M

9.2.1.47

–

–

Range bound

Explanation

maxnoofCellsforRestart

Maximum no. of Cell ID subject for reloading warning messages broadcast. Value is 256.

maxnoofRestartTAIs

Maximum no. of TAI subject for reloading warning message broadcast. Value is 2048.

maxnoofRestartEmergencyAreaID

Maximum no. of Emergency Area ID subject for reloading warning message broadcast. Value is 256.

9.1.13.6 PWS FAILURE INDICATION

This message is sent by the eNB to inform the MME that ongoing PWS operation for one or more cells of the eNB has failed.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

PWS failed E-CGI List

1..<maxnoofCellsineNB>

EACH

reject

>E-CGI

M

9.2.1.38

–

–

Global eNB ID

M

9.2.1.37

YES

reject

Range bound

Explanation

maxnoofCellsineNB

Maximum no. of cells that can be served by an eNB. Value is 256.

9.1.14 eNB DIRECT INFORMATION TRANSFER

This message is sent by the eNB in order to transfer specific information.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

Inter-system Information Transfer Type

M

9.2.1.55

YES

reject

9.1.15 MME DIRECT INFORMATION TRANSFER

This message is sent by the MME in order to transfer specific information.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

Inter-system Information Transfer Type

M

9.2.1.55

YES

reject

9.1.16 eNB CONFIGURATION TRANSFER

This message is sent by the eNB in order to transfer RAN configuration information.

Direction: eNB → MME.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

SON Configuration Transfer

O

9.2.3.26

YES

ignore

EN-DC SON Configuration Transfer

O

9.2.3.26a

YES

ignore

Inter-system SON Configuration Transfer

O

OCTET STRING

Contains the Inter-system SON Configuration Transfer IE as defined in TS 38.413 [44].

YES

ignore

9.1.17 MME CONFIGURATION TRANSFER

This message is sent by the MME in order to transfer RAN configuration information.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

SON Configuration Transfer

O

9.2.3.26

YES

ignore

EN-DC SON Configuration Transfer

O

9.2.3.26a

YES

ignore

Inter-system SON Configuration Transfer

O

OCTET STRING

Contains the Inter-system SON Configuration Transfer IE as defined in TS 38.413 [44].

YES

ignore

9.1.18 CELL TRAFFIC TRACE

This message is sent by eNB to transfer specific information.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

E-UTRAN Trace ID

M

OCTET STRING (SIZE(8))

The E-UTRAN Trace ID IE is composed of the following: Trace Reference defined in TS 32.422 [10] (leftmost 6 octets, with PLMN information coded as in 9.2.3.8), and

Trace Recording Session Reference defined in TS 32.422 [10] (last 2 octets).

YES

ignore

E-UTRAN CGI

M

9.2.1.38

YES

ignore

Trace Collection Entity IP Address

M

Transport Layer Address 9.2.2.1

Defined in TS 32.422 [10]

YES

ignore

Privacy Indicator

O

ENUMERATED (Immediate MDT, Logged MDT, …)

YES

ignore

9.1.19 LPPa Transport Messages

9.1.19.1 DOWNLINK UE ASSOCIATED LPPA TRANSPORT

This message is sent by the MME and is used for carrying LPPa message over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Routing ID

M

9.2.3.33

YES

reject

LPPa-PDU

M

9.2.3.32

YES

reject

9.1.19.2 UPLINK UE ASSOCIATED LPPA TRANSPORT

This message is sent by the eNB and is used for carrying LPPa message over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

reject

eNB UE S1AP ID

M

9.2.3.4

YES

reject

Routing ID

M

9.2.3.33

YES

reject

LPPa-PDU

M

9.2.3.32

YES

reject

9.1.19.3 DOWNLINK NON UE ASSOCIATED LPPA TRANSPORT

This message is sent by the MME and is used for carrying LPPa message over the S1 interface.

Direction: MME → eNB

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

Routing ID

M

9.2.3.33

YES

reject

LPPa-PDU

M

9.2.3.32

YES

reject

9.1.19.4 UPLINK NON UE ASSOCIATED LPPA TRANSPORT

This message is sent by the eNB and is used for carrying LPPa message over the S1 interface.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

Routing ID

M

9.2.3.33

YES

reject

LPPa-PDU

M

9.2.3.32

YES

reject

9.1.20 Secondary RAT Report Data Usage Messages

9.1.20.1 SECONDARY RAT DATA USAGE REPORT

This message is sent by the eNB to report Secondary RAT data usage.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

ignore

MME UE S1AP ID

M

9.2.3.3

YES

ignore

eNB UE S1AP ID

M

9.2.3.4

YES

ignore

Secondary RAT Usage Report list

M

9.2.1.124

YES

ignore

Handover Flag

O

9.2.1.125

YES

ignore

User Location Information

O

9.2.1.93

YES

ignore

Time Since Secondary Node Release

O

9.2.1.143

Yes

ignore

9.1.21 UE Radio Capability ID Mapping Messages

9.1.21.1 UE RADIO CAPABILITY ID MAPPING REQUEST

This message is sent by the eNB and is used to request the UE Radio Capability information that maps to a specific UE Radio Capability ID.

Direction: eNB → MME

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

UE Radio Capability ID

M

9.2.1.153

YES

reject

9.1.21.2 UE RADIO CAPABILITY ID MAPPING RESPONSE

This message is sent by the MME and is used to provide the UE Radio Capability information that maps to a specific UE Radio Capability ID indicated in the UE RADIO CAPABILITY ID MAPPING REQUEST message.

Direction: MME → eNB.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.2.1.1

YES

reject

UE Radio Capability ID

M

9.2.1.153

YES

reject

UE Radio Capability

M

9.2.1.27

YES

ignore

Criticality Diagnostics

O

9.2.1.21

YES

ignore