9.2 Message Functional Definition and Content

38.4633GPPE1 Application Protocol (E1AP)NG-RANRelease 16TS

9.2.1 Interface Management messages

9.2.1.1 RESET

This message is sent by both the gNB-CU-CP and the gNB-CU-UP and is used to request that the E1 interface, or parts of the E1 interface, to be reset.

Direction: gNB-CU-CP → gNB-CU-UP and gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

CHOICE Reset Type

M

YES

reject

>E1 interface

>>Reset All

M

ENUMERATED (Reset all,…)

–

>Part of E1 interface

>>UE-associated logical E1-connection list

1

–

>>>UE-associated logical E1-connection Item

1 .. <maxnoofIndividualE1ConnectionsToReset>

EACH

reject

>>>>gNB-CU-CP UE E1AP ID

O

9.3.1.4

–

>>>>gNB-CU-UP UE E1AP ID

O

9.3.1.5

–

Range bound

Explanation

maxnoofIndividualE1ConnectionsToReset

Maximum no. of UE-associated logical E1-connections allowed to reset in one message. Value is 65536.

9.2.1.2 RESET ACKNOWLEDGE

This message is sent by both the gNB-CU-CP and the gNB-CU-UP as a response to a RESET message.

Direction: gNB-CU-UP → gNB-CU-CP and gNB-CU-CP → gNB-CU-UP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

UE-associated logical E1-connection list

0..1

YES

ignore

>UE-associated logical E1-connection Item

1 .. <maxnoofIndividualE1ConnectionsToReset>

EACH

ignore

>>gNB-CU-CP UE E1AP ID

O

9.3.1.4

–

>>gNB-CU-UP UE E1AP ID

O

9.3.1.5

–

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Range bound

Explanation

maxnoofIndividualE1ConnectionsToReset

Maximum no. of UE-associated logical E1-connections allowed to reset in one message. Value is 65536.

9.2.1.3 ERROR INDICATION

This message is sent by both the gNB-CU-CP and the gNB-CU-UP and is used to indicate that some error has been detected in the node.

Direction: gNB-CU-CP → gNB-CU-UP and gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

ignore

Transaction ID

M

9.3.1.53

This IE is ignored if received in UE associated signalling message.

YES

reject

gNB-CU-CP UE E1AP ID

O

9.3.1.4

YES

ignore

gNB-CU-UP UE E1AP ID

O

9.3.1.5

YES

ignore

Cause

O

9.3.1.2

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.4 GNB-CU-UP E1 SETUP REQUEST

This message is sent by the gNB-CU-UP to transfer information for a TNL association.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-UP ID

M

9.3.1.15

YES

reject

gNB-CU-UP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-UP.

YES

ignore

CN Support

M

ENUMERATED (EPC. 5GC, both, …)

YES

reject

Supported PLMNs

1..<maxnoofSPLMNs>

Supported PLMNs

YES

reject

>PLMN Identity

M

9.3.1.7

–

–

>Slice Support List

O

9.3.1.8

Supported S-NSSAIs per PLMN.

–

–

>Extended Slice Support List

O

9.3.1.94

Additional Supported S-NSSAIs per PLMN.

YES

reject

>NR CGI Support List

O

9.3.1.36

Supported cells.

–

–

>QoS Parameters Support List

O

9.3.1.37

Supported QoS parameters per PLMN.

–

–

>NPN Support Information

O

9.3.1.83

YES

reject

>Extended NR CGI Support List

O

9.3.1.97

Additional supported cells per PLMN.

YES

ignore

gNB-CU-UP Capacity

O

9.3.1.56

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-UP Name

O

9.3.1.95

YES

ignore

Range bound

Explanation

maxnoofSPLMNs

Maximum no. of Supported PLMN Ids. Value is 12.

9.2.1.5 GNB-CU-UP E1 SETUP RESPONSE

This message is sent by the gNB-CU-CP to transfer information for a TNL association.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-CP.

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-CP Name

O

9.3.1.96

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.6 GNB-CU-UP E1 SETUP FAILURE

This message is sent by the gNB-CU-CP to indicate E1 Setup failure.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

Time To wait

O

9.3.1.6

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.7 GNB-CU-CP E1 SETUP REQUEST

This message is sent by the gNB-CU-CP to transfer information for a TNL association.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-CP.

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-CP Name

O

9.3.1.95

YES

ignore

9.2.1.8 GNB-CU-CP E1 SETUP RESPONSE

This message is sent by the gNB-CU-UP to transfer information for a TNL association.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-UP ID

M

9.3.1.15

YES

reject

gNB-CU-UP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-UP.

YES

ignore

CN Support

M

ENUMERATED (EPC. 5GC, both, …)

YES

reject

Supported PLMNs

1..<maxnoofSPLMNs>

Supported PLMNs

YES

reject

>PLMN Identity

M

9.3.1.7

–

–

>Slice Support List

O

9.3.1.8

Supported S-NSSAIs per PLMN.

–

–

>Extended Slice Support List

O

9.3.1.94

Additional Supported S-NSSAIs per PLMN.

YES

reject

>NR CGI Support List

O

9.3.1.36

Supported cells.

–

–

>QoS Parameters Support List

O

9.3.1.37

Supported QoS parameters per PLMN.

–

–

>NPN Support Information

O

9.3.1.83

YES

reject

>Extended NR CGI Support List

O

9.3.1.97

Additional supported cells per PLMN.

YES

ignore

gNB-CU-UP Capacity

O

9.3.1.56

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-UP Name

O

9.3.1.95

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Range bound

Explanation

maxnoofSPLMNs

Maximum no. of Supported PLMN Ids. Value is 12.

9.2.1.9 GNB-CU-CP E1 SETUP FAILURE

This message is sent by the gNB-CU-UP to indicate E1 Setup failure.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

Time To wait

O

9.3.1.6

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.10 GNB-CU-UP CONFIGURATION UPDATE

This message is sent by the gNB-CU-UP to transfer updated information for a TNL association.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-UP ID

O

9.3.1.15

YES

reject

gNB-CU-UP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-UP.

YES

ignore

Supported PLMNs

0..<maxnoofSPLMNs>

Supported PLMNs

YES

reject

>PLMN Identity

M

9.3.1.7

–

–

>Slice Support List

O

9.3.1.8

Supported S-NSSAIs per PLMN.

–

–

>Extended Slice Support List

O

9.3.1.94

Additional Supported S-NSSAIs per PLMN.

YES

reject

>NR CGI Support List

O

9.3.1.36

Supported cells.

–

–

>QoS Parameters Support List

O

9.3.1.37

Supported QoS parameters per PLMN.

–

–

>NPN Support Information

O

9.3.1.83

YES

reject

>Extended NR CGI Support List

O

9.3.1.97

Additional supported cells per PLMN.

YES

ignore

gNB-CU-UP Capacity

O

9.3.1.56

YES

ignore

gNB-CU-UP TNLA To Remove List

0..1

YES

reject

>gNB-CU-UP TNLA To Remove Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Address

M

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-UP.

–

–

>>TNLA Transport Layer Address gNB-CU-CP

O

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-CP.

–

–

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-UP Name

O

9.3.1.96

YES

ignore

Range bound

Explanation

maxnoofSPLMNs

Maximum no. of Supported PLMN Ids. Value is 12.

maxnoofTNLAssociations

Maximum numbers of TNL Associations between the gNB-CU-UP and the gNB-CU-CP. Value is 32.

9.2.1.11 GNB-CU-UP CONFIGURATION UPDATE ACKNOWLEDGE

This message is sent by a gNB-CU-CP to a gNB-CU-UP to acknowledge update of information for a TNL association.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

9.2.1.12 GNB-CU-UP CONFIGURATION UPDATE FAILURE

This message is sent by the gNB-CU-CP to indicate gNB-CU-UP Configuration Update failure.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

Time To wait

O

9.3.1.6

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.13 GNB-CU-CP CONFIGURATION UPDATE

This message is sent by the gNB-CU-CP to transfer updated information for a TNL association.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Name

O

PrintableString(SIZE(1..150,…))

Human readable name of the gNB-CU-CP

YES

ignore

gNB-CU-CP TNLA To Add List

0..1

YES

ignore

>gNB-CU-CP TNLA To Add Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Information

M

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-CP.

–

–

>>TNLA Usage

M

ENUMERATED (ue, non-ue, both, …)

Indicates whether the TNLA is only used for UE-associated signalling, or non-UE-associated signalling, or both. For usage of this IE, refer to TS 38.462 [18].

–

–

gNB-CU-CP TNLA To Remove List

0..1

YES

ignore

>gNB-CU-CP TNLA To Remove Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Address

M

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-CP.

–

–

>>TNLA Transport Layer Address gNB-CU-UP

O

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-UP.

YES

reject

gNB-CU-CP TNLA To Update List

0..1

YES

ignore

>gNB-CU-CP TNLA To Update Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Address

M

CP Transport Layer Address

9.3.2.2

Transport Layer Address of the gNB-CU-CP.

–

–

>>TNLA Usage

O

ENUMERATED (ue, non-ue, both, …)

Indicates whether the TNLA is only used for UE-associated signalling, or non-UE-associated signalling, or both. For usage of this IE, refer to TS 38.462 [18].

–

–

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Extended gNB-CU-CP Name

O

9.3.1.95

YES

ignore

Range bound

Explanation

maxnoofTNLAssociations

Maximum numbers of TNL Associations between the gNB-CU-CP and the gNB-CU-UP. Value is 32.

9.2.1.14 GNB-CU-CP CONFIGURATION UPDATE ACKNOWLEDGE

This message is sent by a gNB-CU-UP to a gNB-CU-CP to acknowledge update of information for a TNL association.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP TNLA Setup List

0..1

YES

ignore

>gNB-CU-CP TNLA Setup Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Address

M

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-CP

–

–

gNB-CU-CP TNLA Failed to Setup List

0..1

YES

ignore

>gNB-CU-CP TNLA Failed To Setup Item IEs

1..<maxnoofTNLAssociations>

–

–

>>TNLA Transport Layer Address

M

CP Transport Layer Information

9.3.2.2

Transport Layer Address of the gNB-CU-CP

–

–

>>Cause

M

9.3.1.2

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Transport Network Layer Address Info

O

9.3.2.7

YES

ignore

Range bound

Explanation

maxnoofTNLAssociations

Maximum numbers of TNL Associations between the gNB-CU-CP and the gNB-CU-UP. Value is 32.

9.2.1.15 GNB-CU-CP CONFIGURATION UPDATE FAILURE

This message is sent by the gNB-CU-UP to indicate gNB-CU-CP Configuration Update failure.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

Time To wait

O

9.3.1.6

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.16 E1 RELEASE REQUEST

This message is sent by both the gNB-CU-CP and the gNB-CU-UP and is used to request the release of the E1 interface.

Direction: gNB-CU-CP → gNB-CU-UP and gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

9.2.1.17 E1 RELEASE RESPONSE

This message is sent by both the gNB-CU-CP and the gNB-CU-UP as a response to an E1 RELEASE REQUEST message.

Direction: gNB-CU-UP → gNB-CU-CP and gNB-CU-CP → gNB-CU-UP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.18 GNB-CU-UP STATUS INDICATION

This message is sent by the gNB-CU-UP to indicate to the gNB-CU-CP its status of overload.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-UP Overload Information

M

ENUMERATED (overloaded, not-overloaded)

YES

reject

9.2.1.19 RESOURCE STATUS REQUEST

This message is sent by an gNB-CU-CP to gNB-CU-UP to initiate the requested measurement according to the parameters given in the message.

Direction: gNB-CU-CP → gNB-CU-UP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-CP

YES

reject

gNB-CU-UP Measurement ID

C-ifRegistrationRequestStop

INTEGER (1..4095,…)

Allocated by gNB-CU-UP

YES

ignore

Registration Request

M

ENUMERATED(start, stop, …)

Type of request for which the resource status is required.

YES

ignore

Report Characteristics

C-ifRegistrationRequestStart

BITSTRING

(SIZE(32))

Each position in the bitmap indicates measurement object the gNB-CU-UP is requested to report.

First Bit = TNL Available Capacity Ind Periodic,

Second Bit = HW Capacity Ind Periodic.

Other bits shall be ignored by the gNB-CU-UP.

YES

reject

Reporting Periodicity

O

ENUMERATED (500ms, 1000ms, 2000ms, 5000ms, 10000ms, 20000ms, 30000ms, 40000ms, 50000ms, 60000ms, 70000ms, 80000ms, 90000ms, 100000ms, 110000ms, 120000ms, …)

Periodicity that can be used for reporting. Also used as the averaging window length for all measurement object if supported.

YES

ignore

Condition

Explanation

ifRegistrationRequestStop

This IE shall be present if the Registration Request IE is set to the value “stop”

ifRegistrationRequestStart

This IE shall be present if the Registration Request IE is set to the value "start".

9.2.1.20 RESOURCE STATUS RESPONSE

This message is sent by the gNB-CU-UP to indicate that the requested measurement, for all the measurement objects included in the measurement is successfully initiated.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-CP

YES

reject

gNB-CU-UP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-UP

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.1.21 RESOURCE STATUS FAILURE

This message is sent by the gNB-CU-UP to indicate that for any of the requested measurement objects the measurement cannot be initiated.

Direction: gNB-CU-UP → gNB-CU-CP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

gNB-CU-CP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-CP

YES

reject

gNB-CU-UP Measurement ID

C-ifRegistrationRequestStop

INTEGER (1..4095,…)

Allocated by gNB-CU-UP

YES

ignore

Cause

M

9.3.1.2

Ignored by the receiver when the Complete Failure Cause Information IE is included

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Condition

Explanation

ifRegistrationRequestStop

This IE shall be present if the Registration Request IE is set to the value “stop”

9.2.1.22 RESOURCE STATUS UPDATE

This message is sent by gNB-CU-UP to gNB-CU-CP to report the results of the requested measurements.

Direction: gNB-CU-UP → gNB-CU-CP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

Ignore

Transaction ID

M

9.3.1.53

YES

Reject

gNB-CU-CP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-CP

YES

Reject

gNB-CU-UP Measurement ID

M

INTEGER (1..4095,…)

Allocated by gNB-CU-UP

YES

Reject

TNL Available Capacity Indicator

O

9.3.1.72

HW Capacity Indicator

O

9.3.1.73

Range bound

Explanation

maxnoofSPLMNs

Maximum no. of Supported PLMN Ids. Value is 12.

maxnoofSliceItems

Maximum no. of signalled slice support items. Value is 1024.

9.2.2 Bearer Context Management messages

9.2.2.1 BEARER CONTEXT SETUP REQUEST

This message is sent by the gNB-CU-CP to request the gNB-CU-UP to setup a bearer context.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

Security Information

M

9.3.1.10

YES

reject

UE DL Aggregate Maximum Bit Rate

M

Bit Rate 9.3.1.20

YES

reject

UE DL Maximum Integrity Protected Data Rate

O

Bit Rate 9.3.1.20

The Bit Rate is a portion of the UE’s Maximum Integrity Protected Data Rate, and is enforced by the gNB-CU-UP node.

YES

reject

Serving PLMN

M

PLMN Identity

9.3.1.7

YES

ignore

Activity Notification Level

M

9.3.1.67

YES

reject

UE Inactivity Timer

O

Inactivity Timer

9.3.1.54

Included if the Activity Notification Level is set to UE.

–

–

Bearer Context Status Change

O

ENUMERATED (Suspend, Resume, …)

Indicates the status of the Bearer Context

YES

reject

CHOICE System

M

YES

reject

>E-UTRAN

>>DRB To Setup List

M

DRB To Setup List E-UTRAN

9.3.3.1

YES

reject

>>Subscriber Profile ID for RAT/Frequency priority

O

9.3.1.69

YES

ignore

>>Additional RRM Policy Index

O

9.3.1.70

YES

Ignore

>NG-RAN

>>PDU Session Resource To Setup List

M

9.3.3.2

YES

reject

RAN UE ID

O

OCTET STRING (SIZE(8))

YES

ignore

gNB-DU ID

O

9.3.1.65

Included whenever it is known by the gNB-CU-CP

YES

ignore

Trace Activation

O

9.3.1.68

YES

ignore

NPN Context Information

O

9.3.1.84

YES

reject

Management Based MDT PLMN List

O

MDT PLMN List

9.3.1.89

YES

ignore

CHO Initiation

O

ENUMERATED (True, …)

YES

reject

Additional Handover Information

O

ENUMERATED(Discard PDCP SN, …)

If set to “Discard PDCP SN”, indicates that the forwarded PDCP SNs have to be removed

YES

ignore

Direct Forwarding Path Availability

O

9.3.1.98

YES

ignore

gNB-CU-UP UE E1AP ID

O

9.3.1.5

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.2 BEARER CONTEXT SETUP RESPONSE

This message is sent by the gNB-CU-UP to confirm the setup of the requested bearer context.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE System

M

YES

reject

>E-UTRAN

>>DRB Setup List

M

DRB Setup List E-UTRAN

9.3.3.3

YES

reject

>>DRB Failed List

O

DRB Failed List E-UTRAN

9.3.3.4

YES

reject

>NG-RAN

>>PDU Session Resource Setup List

M

9.3.3.5

YES

reject

>>PDU Session Resource Failed List

O

9.3.3.6

YES

reject

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.3 BEARER CONTEXT SETUP FAILURE

This message is sent by the gNB-CU-UP to indicate that the setup of the bearer context was unsuccessful.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

O

9.3.1.5

YES

ignore

Cause

M

9.3.1.2

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.2.4 BEARER CONTEXT MODIFICATION REQUEST

This message is sent by the gNB-CU-CP to request the gNB-CU-UP to modify a bearer context.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Security Information

O

9.3.1.10

YES

reject

UE DL Aggregate Maximum Bit Rate

O

Bit Rate 9.3.1.20

YES

reject

UE DL Maximum Integrity Protected Data Rate

O

Bit Rate 9.3.1.20

The Bit Rate is a portion of the UE’s Maximum Integrity Protected Data Rate, and is enforced by the gNB-CU-UP node.

YES

reject

Bearer Context Status Change

O

ENUMERATED (Suspend, Resume, …)

Indicates the status of the Bearer Context

YES

reject

New UL TNL Information Required

O

ENUMERATED (required, …)

Indicates that new UL TNL information has been requested to be provided.

YES

reject

UE Inactivity Timer

O

Inactivity Timer

9.3.1.54

Included if the Activity Notification Level is set to UE.

–

–

Data Discard Required

O

ENUMERATED (required, …)

Indicate to discard the DL user data in case of RAN paging failure.

YES

ignore

CHOICE System

O

YES

reject

>E-UTRAN

>>DRB To Setup List

O

DRB To Setup Modification List E-UTRAN

9.3.3.7

YES

reject

>>DRB To Modify List

O

DRB To Modify List E-UTRAN

9.3.3.8

YES

reject

>>DRB To Remove List

O

DRB To Remove List E-UTRAN

9.3.3.9

YES

reject

>>Subscriber Profile ID for RAT/Frequency priority

O

9.3.1.69

YES

ignore

>>Additional RRM Policy Index

O

9.3.1.70

YES

ignore

>NG-RAN

>>PDU Session Resource To Setup List

O

PDU Session Resource To Setup Modification List

9.3.3.10

YES

reject

>>PDU Session Resource To Modify List

O

9.3.3.11

YES

reject

>>PDU Session Resource To Remove List

O

9.3.3.12

YES

reject

RAN UE ID

O

OCTET STRING (SIZE(8))

YES

ignore

gNB-DU ID

O

9.3.1.65

YES

ignore

Activity Notification Level

O

9.3.1.67

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.5 BEARER CONTEXT MODIFICATION RESPONSE

This message is sent by the gNB-CU-UP to confirm the modification of the requested bearer context.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE System

O

YES

ignore

>E-UTRAN

>>DRB Setup List

O

DRB Setup Modification List E-UTRAN

9.3.3.13

YES

ignore

>>DRB Failed List

O

DRB Failed Modification List E-UTRAN

9.3.3.14

YES

ignore

>>DRB Modified List

O

DRB Modified List E-UTRAN

9.3.3.15

YES

ignore

>>DRB Failed To Modify List

O

DRB Failed To Modify List E-UTRAN

9.3.3.16

YES

ignore

>>Retainability Measurements Information

O

9.3.1.71

Provides information on all the removed DRB(s), needed for retainability measurements in the gNB-CU-CP

YES

ignore

>NG-RAN

>>PDU Session Resource Setup List

O

PDU Session Resource Setup Modification List

9.3.3.17

YES

reject

>>PDU Session Resource Failed List

O

PDU Session Resource Failed Modification List

9.3.3.18

YES

reject

>>PDU Session Resource Modified List

O

9.3.3.19

YES

reject

>>PDU Session Resource Failed To Modify List

O

9.3.3.20

YES

reject

>>Retainability Measurements Information

O

9.3.1.71

Provides information on all the removed DRB(s), needed for retainability measurements in the gNB-CU-CP

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.6 BEARER CONTEXT MODIFICATION FAILURE

This message is sent by the gNB-CU-UP to indicate that the modification of the bearer context was unsuccessful.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Cause

M

9.3.1.2

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.2.7 BEARER CONTEXT MODIFICATION REQUIRED

This message is sent by the gNB-CU-UP to inform the gNB-CU-CP that a modification of a bearer context is required (e.g., due to local problems at the gNB-CU-UP).

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE System

M

YES

reject

>E-UTRAN

>>DRB To Modify List

O

DRB Required To Modify List E-UTRAN

9.3.3.21

YES

reject

>>DRB To Remove List

O

DRB Required To Remove List

9.3.3.22

YES

reject

>NG-RAN

>>PDU Session Resource Required To Modify List

O

PDU Session Resource Required To Modify List

9.3.3.23

YES

reject

>>PDU Session Resource To Remove List

O

9.3.3.12

YES

reject

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.8 BEARER CONTEXT MODIFICATION CONFIRM

This message is sent by the gNB-CU-CP to confirm the modification of the requested bearer context.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE System

O

YES

ignore

>E-UTRAN

>>DRB Modified List

O

DRB Confirm Modified List E-UTRAN

9.3.3.24

YES

ignore

>NG-RAN

>>PDU Session Resource Modified List

O

PDU Session Resource Confirm Modified List

9.3.3.25

YES

Ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.9 BEARER CONTEXT RELEASE COMMAND

This message is sent by the gNB-CU-CP to command the gNB-CU-UP to release an UE-associated logical E1 connection.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Cause

M

9.3.1.2

YES

ignore

9.2.2.10 BEARER CONTEXT RELEASE COMPLETE

This message is sent by the gNB-CU-UP to confirm the release of the UE-associated logical E1 connection.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Criticality Diagnostics

O

9.3.1.3

YES

ignore

Retainability Measurements Information

O

9.3.1.71

Provides information on all the removed DRB(s) and QoS Flow(s), needed for retainability measurements in the gNB-CU-CP

YES

ignore

9.2.2.11 BEARER CONTEXT RELEASE REQUEST

This message is sent by the gNB-CU-UP to request the release of an UE-associated logical E1 connection.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

DRB Status List

0.. 1

YES

ignore

>DRB Status Item

1..<maxnoofDRBs>

–

–

>>DRB ID

M

9.3.1.16

–

–

>>PDCP DL Count

O

PDCP Count

9.3.1.35

PDCP count for next DL packet to be assigned.

–

–

>>PDCP UL Count

O

PDCP Count

9.3.1.35

PDCP count for first un-acknowledged UL packet.

–

–

Cause

M

9.3.1.2

YES

ignore

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

9.2.2.12 BEARER CONTEXT INACTIVITY NOTIFICATION

This message is sent by the gNB-CU-UP to provide information about the UE activity to the gNB-CU-CP.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE Activity Information

M

YES

reject

>DRB Activity List

1

Used if the Activity Notification Level IE is set as “DRB” in BEARER CONTEXT SETUP Request message

YES

reject

>>DRB Activity Item

1 .. <maxnoofDRBs>

–

–

>>>DRB ID

M

9.3.1.16

–

–

>>>DRB Activity

M

ENUMERATED (Active, Not active, …)

–

–

>PDU Session Resource Activity List

1

Used if the Activity Notification Level IE is set as “PDU Session” in the BEARER CONTEXT SETUP Request message

YES

reject

>>PDU Session Resource Activity Item

1 .. <maxnoofPDUSessionResource>

–

–

>>>PDU Session ID

M

9.3.1.21

–

–

>>>PDU Session Resource Activity

M

ENUMERATED (Active, Not active, …)

–

–

>UE Activity

M

ENUMERATED (Active, Not active, …)

Used if the Activity Notification Level IE is set as “UE” in the BEARER CONTEXT SETUP Request message

YES

reject

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRB for a UE, the maximum value is 32.

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.13 DL DATA NOTIFICATION

This message is sent by the gNB-CU-UP to provide information about the DL data detection to the gNB-CU-CP.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Paging Priority Indicator (PPI)

O

9.3.1.55

YES

ignore

PDU Session To Notify List

O

YES

ignore

>PDU Session To Notify Item

1..<maxnoofPDUSessionResource>

–

–

>>PDU Session ID

M

9.3.1.21

–

–

>>QoS Flow List

M

9.3.1.12

–

–

Range bound

Explanation

maxnoofPDUSessionResource

Maximum no. of PDU Sessions for a UE. Value is 256.

9.2.2.14 DATA USAGE REPORT

This message is sent by the gNB-CU-UP to report data volumes.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Data Usage Report List

M

9.3.1.44

YES

ignore

9.2.2.15 GNB-CU-UP COUNTER CHECK REQUEST

This message is sent by the gNB-CU-UP to request the verification of the value of the PDCP COUNTs associated with the DRBs established in the gNB-CU-UP.

Direction: gNB-CU-UP → gNB-CU-CP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

CHOICE System

M

YES

reject

>E-UTRAN

>>DRBs Subject to

Counter Check List

1

YES

ignore

>>>DRBs Subject to Counter Check Item

1 .. <maxnoof DRBs>

–

–

>>>>DRB ID

M

9.3.1.16

–

–

>>>>PDCP UL Count

M

PDCP Count 9.3.1.35

Indicates the value of uplink COUNT associated to this DRB, as specified in TS 38.331 [8].

–

–

>>>>PDCP DL Count

M

PDCP Count 9.3.1.35

Indicates the value of downlink COUNT associated to this DRB, as specified in TS 38.331 [8].

–

–

>NG-RAN

>>DRBs Subject to Counter Check List

1

YES

ignore

>>>DRBs Subject to Counter Check Item

1 .. <maxnoof DRBs>

–

–

>>>>PDU Session ID

M

9.3.1.21

–

–

>>>>DRB ID

M

9.3.1.16

–

–

>>>>PDCP UL Count

M

PDCP Count 9.3.1.35

Indicates the value of uplink COUNT associated to this DRB, as specified in TS 38.331 [8].

–

–

>>>>PDCP DL Count

M

PDCP Count 9.3.1.35

Indicates the value of downlink COUNT associated to this DRB, as specified in TS 38.331 [8].

–

–

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRBs for a UE. Value is 32.

9.2.2.16 UL DATA NOTIFICATION

This message is sent by the gNB-CU-UP to provide information about the UL data detection to the gNB-CU-CP.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

PDU Session To Notify List

1

YES

reject

>PDU Session To Notify Item

1..<maxnoofPDUSessionResource>

–

–

>>PDU Session ID

M

9.3.1.21

–

–

>>QoS Flow List

M

9.3.1.12

–

–

9.2.2.17 MR-DC DATA USAGE REPORT

This message is sent by the gNB-CU-UP to report data volumes when the UE is connected to the 5GC.

Direction: gNB-CU-UP → gNB-CU-CP.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

PDU Session Resource Data Usage List

1

YES

ignore

>PDU Session Resource Data Usage Item

1 .. <maxnoof PDUsessions>

–

>>PDU Session ID

M

9.3.1.21

–

>>MR-DC Usage Information

M

9.3.1.63

–

Range bound

Explanation

maxnoofPDUsessions

Maximum no. of PDU sessions. Value is 256

9.2.2.18 EARLY FORWARDING SN TRANSFER

This message is sent by the source gNB-CU-UP to the source gNB-CU-CP to transfer the COUNT value(s) related to early forwarded downlink PDCP SDUs during Conditional Handover or conditional PSCell change.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

DRBs Subject To Early Forwarding List

M

1

YES

reject

>DRBs Subject To Early Forwarding Item

1 .. <maxnoofDRBs>

–

–

>>DRB ID

M

9.3.1.16

–

–

>>DL COUNT Value

M

PDCP Count

9.3.1.35

PDCP-SN and Hyper frame number of the last DL SDU successfully delivered in sequence to the UE, if RLC-AM, and successfully transmitted, if RLC-UM.

–

–

9.2.2.19 GNB-CU-CP MEASUREMENT RESULTS INFORMATION

This message is sent to the gNB-CU-UP to provide the measurement result received by the gNB-CU-CP.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

DRB Measurement Results Information List

1

YES

reject

>DRB Measurement Results Information Item

1 .. <maxnoofDRBs>

EACH

reject

>>DRB ID

M

9.3.1.16

–

>>UL D1 Result

O

INTEGER (0 .. 10000,…)

The unit is: 0.1ms

–

Range bound

Explanation

maxnoofDRBs

Maximum no. of DRB allowed towards one UE, the maximum value is 64.

9.2.3 Trace Messages

9.2.3.1 TRACE START

This message is sent by the gNB-CU-CP to initiate a trace session for a UE.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

ignore

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Trace Activation

M

9.3.1.68

YES

ignore

9.2.3.2 DEACTIVATE TRACE

This message is sent by the gNB-CU-CP to deactivate a trace session.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

ignore

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Trace ID

M

OCTET STRING (SIZE(8))

As per Trace ID in Trace Activation IE

YES

ignore

9.2.3.3 CELL TRAFFIC TRACE

This message is sent by the gNB-CU-UP to initiate a trace session for a UE.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

ignore

gNB-CU-CP UE E1AP ID

M

9.3.1.4

YES

reject

gNB-CU-UP UE E1AP ID

M

9.3.1.5

YES

reject

Trace ID

M

OCTET STRING (SIZE(8))

The Trace ID IE is composed of the following: Trace Reference defined in TS 32.422 [24] (leftmost 6 octets, with PLMN information coded as in 9.2.3.8), and

Trace Recording Session Reference defined in TS 32.422 [24] (last 2 octets).

YES

ignore

Trace Collection Entity IP Address

M

Transport Layer Address 9.2.2.1

For File based Reporting.

Defined in TS 32.422 [24].

Should be ignored if URI is present.

YES

ignore

Privacy Indicator

O

ENUMERATED (Immediate MDT, Logged MDT, …)

YES

ignore

Trace Collection Entity URI

O

9.3.2.8

For Streaming based Reporting.

Defined in TS 32.422 [24]

Replaces Trace Collection Entity IP Address if present.

YES

ignore

9.2.4 IAB Messages

9.2.4.1 IAB UP TNL ADDRESS UPDATE

This message is sent by the gNB-CU-CP to request the gNB-CU-UP to update the TNL address(es) of the DL F1-U GTP tunnel information.

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

DL UP TNL Address To Update List

0..1

YES

reject

> DL UP TNL Address To Update Item IEs

1..<maxnoofTNLAddresses>

–

–

>>Old TNL Address

M

9.3.2.4

The old Transport Layer Address of IAB-DU for DL F1-U GTP tunnel.

–

–

>>New TNL Address

M

9.3.2.4

The new Transport Layer Address of IAB-DU for DL F1-U GTP tunnel.

–

–

Range bound

Explanation

maxnoofTNLAddresses

Maximum no. of TNL addresses to be updated in one E1AP procedure. Value is 8.

9.2.4.2 IAB UP TNL ADDRESS UPDATE ACKNOWLEDGE

This message is sent by the gNB-CU-UP to the gNB-CU-CP to acknowledge the update of TNL address in DL F1-U GTP tunnel information, or provide the updated TNL address(es) of the UL F1-U GTP tunnel information.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Criticality Diagnostics

O

9.3.1.3

YES

ignore

UL UP TNL Address to Update List

0..1

YES

ignore

> UL UP TNL Address Updated Item IEs

1..<maxnoofTNLAddresses>

–

–

>>Old TNL Address

M

9.3.2.4

The old Transport Layer Address of CU-UP for UL F1-U GTP tunnel.

–

–

>>New TNL Address

M

9.3.2.4

The new Transport Layer Address of CU-UP for UL F1-U GTP tunnel.

–

–

Range bound

Explanation

maxnoofTNLAddresses

Maximum no. of TNL addresses updated in one E1AP procedure. Value is 8.

9.2.4.3 IAB UP TNL ADDRESS UPDATE FAILURE

This message is sent by the gNB-CU-UP to indicate IAB UP TNL address Update failure.

Direction: gNB-CU-UP → gNB-CU-CP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.53

YES

reject

Cause

M

9.3.1.2

YES

ignore

Time To wait

O

9.3.1.6

YES

ignore

Criticality Diagnostics

O

9.3.1.3

YES

ignore

9.2.4.4 IAB PSK NOTIFICATION

This message is sent by the gNB-CU-CP to the gNB-CU-UP to transfer the security key info to be used for the IKEv2 Pre-shared Secret Key (PSK) authentication to protect the F1-U interface of the IAB-node(s).

Direction: gNB-CU-CP → gNB-CU-UP

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Message Type

M

9.3.1.1

YES

reject

Transaction ID

M

9.3.1.23

YES

reject

IAB-donor-CU-UP PSK Info

M

9.3.1.99

YES

reject