4.9.21 Test procedure for PDU Session Release
38.508-13GPP5GSPart 1: Common test environmentRelease 17TSUser Equipment (UE) conformance specification
4.9.21.1 Scope
The purpose of this procedure is to release both the PDU session and the user plane resources.
4.9.21.2 Procedure description
4.9.21.2.1 Initial conditions
The UE is in state 3N-A with PDU SESSION ACTIVE as per Table 4.4A.2-3. If this is a UE triggered PDU Session Release, this will be specified in the test case together with the sending of a PDU SESSION RELEASE REQUEST by the UE.
4.9.21.2.2 Procedure sequence
Table 4.9.21.2.2-1: Procedure for PDU Session Release
|
St |
Procedure |
Message Sequence |
|
|
U – S |
Message |
||
|
1 |
The SS transmits an RRCReconfiguration message and a PDU SESSION RELEASE COMMAND |
<– |
NR RRC: RRCReconfiguration 5GMM: DL NAS TRANSPORT 5GSM: PDU SESSION RELEASE COMMAND |
|
– |
EXCEPTION: Depending upon UE implementation, step 1A and 2 can occur in any order |
– |
– |
|
1A |
The UE transmits a RRCReconfigurationComplete |
– |
NR RRC: RRCReconfigurationComplete |
|
2 |
The UE transmits a PDU SESSION RELEASE COMPLETE message |
–> |
NR RRC: ULInformationTransfer 5GMM: UL NAS TRANSPORT 5GSM: PDU SESSION RELEASE COMPLETE |
4.9.21.3 Specific message contents
The NAS message contents will be as specified in the test case.
Table 4.9.21.3-1: RRCReconfiguration (step 1, Table 4.9.21.2.2-1)
|
Derivation Path: Table 4.6.1-13. |
||||
|
Information Element |
Value/remark |
Comment |
Condition |
|
|
RRCReconfiguration ::= SEQUENCE { |
||||
|
criticalExtensions CHOICE { |
||||
|
rrcReconfiguration SEQUENCE { |
||||
|
radioBearerConfig SEQUENCE { |
||||
|
drb-ToReleaseList SEQUENCE (SIZE (1..maxDRB)) OF DRB-Identity { |
1 entry |
|||
|
DRB-Identity[1] |
DRB-Identity linked to the PDU Session to be released |
|||
|
} |
||||
|
} |
||||
|
nonCriticalExtension SEQUENCE { |
||||
|
masterCellGroup SEQUENCE { |
||||
|
rlc-BearerToReleaseList SEQUENCE (SIZE (1..maxLC-ID)) OF LogicalChannelIdentity { |
1 entry |
|||
|
logicalChannelIdentity[1] |
Same value as drb-Identity[1] above |
|||
|
} |
||||
|
} |
||||
|
} |
||||
|
} |
||||
|
} |
||||
|
} |
||||