4.9.27 Test procedure for adding video to a speech call in 5GC
38.508-13GPP5GSPart 1: Common test environmentRelease 17TSUser Equipment (UE) conformance specification
4.9.27.1 Scope
The purpose of this procedure is to add video to an established speech call.
4.9.27.2 Procedure description
4.9.27.2.1 Initial conditions
System Simulator:
– 1 NR Cell connected to 5GC, default parameters.
User Equipment:
– The UE is in state 3N-A and registered to the IMS.
4.9.27.2.2 Procedure sequence
Table 4.9.27.2.2-1: IMS video call addition in 5GC
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St |
Procedure |
Message Sequence |
TP |
Verdict |
|
|
U – S |
Message |
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1 |
The SS transmits an RRCReconfiguration message and a PDU SESSION MODIFICATION COMMAND message. |
<– |
NR RRC: RRCReconfiguration |
– |
– |
|
– |
EXCEPTION: Steps 2 and 3 can occur in any order. |
– |
– |
– |
– |
|
2 |
The UE transmits an RRCReconfigurationComplete message |
–> |
NR RRC: RRCReconfigurationComplete |
– |
– |
|
3 |
Check: Does the UE transmit a ULInformationTransfer message, an UL NAS TRANSPORT message and an PDU SESSION MODIFICATION COMPLETE message? |
–> |
NR RRC: ULInformationTransfer 5GMM: UL NAS TRANSPORT 5GSM: PDU SESSION MODIFICATION COMPLETE |
– |
– |
4.9.27.3 Specific message contents
Table 4.9.27.3-1: PDU SESSION MODIFICATION COMMAND (step 1, Table 4.9.27.2.2-1)
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Derivation Path: TS 38.508-1 [21], Table 4.7.2-9. |
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Information Element |
Value/remark |
Comment |
Condition |
|
|
PDU session ID |
Same value as sent in PDU SESSION ESTABLISHMENT REQUEST message. |
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Authorized QoS rules |
Reference QoS rule #7 as defined in Table 4.8.2.1-7 using condition IMS_VIDEO and Rule operation code 011. |
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Authorized QoS flow descriptions |
Reference QoS flow #6 as defined in Table 4.8.2.3-6 respectively. |
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Mapped EPS bearer contexts |
Not Present |
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|
Mapped EPS bearer contexts |
Interworking_with_EPS |
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|
Mapped EPS bearer context |
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|
EPS bearer identity |
The same value as the one specified in the Reference QoS flow referred to from the Reference QoS rule indicated in the IE Authorized QoS rules |
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|
Operation code |
‘001’B |
Create new EPS bearer |
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|
E bit |
‘1’B |
Parameters list is included |
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|
Number of EPS parameters |
’0001’B |
1 parameter |
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|
Mapped EPS QoS parameters |
See reference dedicated EPS bearer context #3 in TS 36.508 table 6.6.2-1 |
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|
Traffic flow Template |
See reference dedicated EPS bearer context#3 in TS 36.508 table 6.6.2-1 |
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|
Condition |
Explanation |
|
Interworking_with_EPS |
If the UE has indicated support of S1, then the SS shall include this IE to provide details for the interworking with EPS being supported for a PDU session. This requirement is set up for the purpose of facilitating the test description. It is not mandatory for the Network to support Mapped EPS bearer contexts. |
Table 4.9.27.3-2: RRCReconfiguration (step 1, Table 4.9.27.2.2-1)
|
Derivation Path: Table 4.6.1-13 with condition NR. |
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|
Information Element |
Value/remark |
Comment |
Condition |
|
RRCReconfiguration ::= SEQUENCE { |
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criticalExtensions CHOICE { |
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c1 CHOICE { |
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rrcReconfiguration SEQUENCE { |
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radioBearerConfig |
RadioBearerConfig-AddVideo |
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|
} |
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nonCriticalExtension SEQUENCE { |
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masterCellGroup |
CellGroupConfig-DRB(0,1) |
OCTET STRING (CONTAINING CellGroupConfig) |
|
|
} |
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} |
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} |
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} |
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Table 4.9.27.3-3 : RadioBearerConfig-AddVideo (Table 4.9.27.3-2)
|
Derivation Path: Table 4.6.3-132 and condition SRB2. |
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|
Information Element |
Value/remark |
Comment |
Condition |
|
RadioBearerConfig ::= SEQUENCE { |
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|
drb-ToAddModList SEQUENCE (SIZE (1..maxDRB)) OF DRB-ToAddMod { |
1 entry |
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|
DRB-ToAddMod [1] SEQUENCE { |
entry 1 |
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|
cnAssociation CHOICE { |
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sdap-Config SEQUENCE { |
SDAP-Config |
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|
defaultDRB |
false |
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} |
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} |
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drb-Identity |
j |
j is allocated according to internal TTCN mapping |
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|
reestablishPDCP |
Not present |
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recoverPDCP |
Not present |
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pdcp-Config |
PDCP-Config with condition UM |
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} |
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