8.1.9a Signalling Connection Release Indication (RLC re-establishment): CS signalling connection release
34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification
8.1.9a.1 Definition
8.1.9a.2 Conformance requirement
If a re-establishment of RLC on signalling radio bearer RB2 occurs before the successful delivery of the SIGNALLING CONNECTION RELEASE INDICATION message has been confirmed by RLC, the UE shall:
1> retransmit the SIGNALLING CONNECTION RELEASE INDICATION message on the uplink DCCH using AM RLC on signalling radio bearer RB2.
Reference
3GPP TS 25.331 clause 8.1.14.2a.
8.1.9a.3 Test purpose
To confirm that the UE re-transmits a SIGNALLING CONNECTION RELEASE INDICATION message after it re-establishes the RLC entity on signalling radio bearer RB2 if SRNS relocation occurs before the successful delivery of SIGNALLING CONECTION RELEASE INDICATION message.
8.1.9a.4 Method of test
Initial Condition
System Simulator: 1 cells – Cell 1.
UE: CS-DCCH+DTCH_DCH (state 6-9) or PS-DCCH+DTCH_DCH (state 6-10) as specified in clause 7.4 of TS 34.108, depending on the CN domain(s) supported by the UE.
Test Procedure
The UE is in CELL_DCH mode. The SS transmits a DOWNLINK DIRECT TRANSFER message. This message contains a NAS message (AUTHENTICATION REQUEST for CS domain or AUTHENTICATION AND CIPHERING REQUEST for PS domain). The UE shall transmit an UPLINK DIRECT TRANSFER message (AUTHENTICATION RESPONSE) using AM on DCCH. After SS responses with a DOWNLINK DIRECT TRANSFER message (AUTHENTICATION REJECT), SS shall set the RLC entity for SRB2 to stop and wait for T3240 to expire in the UE. The UE shall send a SIGNALLING CONNECTION RELEASE INDICATION message which includes the CN domain identity with the same value as that in the UPLINK DIRECT TRANSFER message. But SS do not respond with STATUS PDU for the AM DATA PDU with POLL. The SS then sends a UTRAN MOBILITY INFORMATION message on SRB1 requesting the UE to do a SRNS relocation. SS shall set the RLC entity for SRB2 to continue. The UE shall send a UTRAN MOBILITY INFORMATION CONFIRM message. The UE shall re-transmit a SIGNALLING CONNECTION RELEASE INDICATION message on the uplink DCCH using AM RLC.
Expected sequence
|
Step |
Direction |
Message |
Comment |
|
|
UE |
SS |
|||
|
1 |
|
DOWNLINK DIRECT TRANSFER (AUTHENTICATION REQUEST) |
Depending on supported CN domain, AUTHENTICATION AND CIPHERING REQUEST message (PS domain) or AUTHENTICATION REQUEST (CS domain) message is embedded in DOWNLINK DIRECT TRANSFER message. An invalid SQN is provided in this message. |
|
|
2 |
|
UPLINK DIRECT TRANSFER (AUTHENTICATION RESPONSE) |
||
|
3 |
|
DOWNLINK DIRECT TRANSFER (AUTHENTICATION REJECT) |
After SS transmits this message, SS sets the RLC entity for SRB2 to stop and waits for T3240 to expire. |
|
|
4 |
|
SIGNALLING CONNECTION RELEASE INDICATION |
||
|
5 |
|
UTRAN MOBILITY INFORMATION |
. SS sets RLC for SRB2 to continue. |
|
|
6 |
|
UTRAN MOBILITY INFORMATION CONFIRM |
UE sends this message on uplink DCCH on AM. |
|
|
7 |
|
SIGNALLING CONNECTION RELEASE INDICATION |
UE re-transmits this message. |
|
Specific Message Content
DOWNLINK DIRECT TRANSFER (Step 1)
Use the same message sub-type as found in TS 34.108 clause 9, with the following exceptions.
|
Information Element |
Value/remark |
|
CN domain identity |
CS domain or PS domain |
|
NAS message |
AUTHENTICATION REQUEST (CS domain) or AUTHENTICATION AND CIPHERING REQUEST (PS domain) |
UPLINK DIRECT TRANSFER (Step 2)
|
Information Element |
Value/remark |
|
Message Type |
|
|
Integrity check info |
|
|
– Message authentication code |
This IE is checked to see if it is present. The value is compared against the XMAC-I value computed by SS. The first/ leftmost bit of the bit string contains the most significant bit of the MAC-I. |
|
– RRC Message sequence number |
This IE is checked to see if it is present. The value is used by SS to compute the XMAC-I value. |
|
CN domain identity |
CS domain or PS domain |
|
NAS message |
AUTHENTICATION FAILURE(CS domain) or AUTHENTICATION AND CIPHERING FAILURE (PS domain) |
|
Measured results on RACH |
Not checked |
UTRAN MOBILITY INFORMATION (Step 5)
Use the same message sub-type found in [9] TS 34.108 clause 9 with the following exception:
|
Information Element |
Value/remark |
|---|---|
|
Ciphering mode info |
This presence of this IE is dependent on IXIT statements in TS 34.123-2. If ciphering is indicated to be active, this IE present with the values of the sub IEs as stated below. Else, this IE is omitted. |
|
– Ciphering mode command |
Start/restart |
|
– Ciphering algorithm |
UEA0 or UEA1. The indicated algorithm must be one of the algorithms supported by the UE as indicated in the IE "security capability" in the RRC CONNECTION SETUP COMPLETE message. |
|
– Ciphering activation time for DPCH |
(256+CFN-(CFN MOD 8 + 8))MOD 256, this IE is set to "Not present" if only PS RABs are established during the initial setup procedure. |
|
– Radio bearer downlink ciphering activation time info |
|
|
– Radio bearer activation time |
|
|
– RB identity |
1 |
|
– RLC sequence number |
Current RLC SN + 2 |
|
– RB identity |
2 |
|
– RLC sequence number |
Current RLC SN + 2 |
|
– RB identity |
3 |
|
– RLC sequence number |
Current RLC SN + 2 |
|
– RB identity |
4 |
|
– RLC sequence number |
Current RLC SN + 2 |
|
– RB identity |
20, this IE is set to "Not present" if PS RAB is not established during the initial setup procedure. |
|
– RLC sequence number |
Current RLC SN + 2 |
|
Integrity protection mode info |
|
|
– Integrity protection mode command |
Start |
|
– Downlink integrity protection activation info |
Not Present |
|
– Integrity protection algorithm |
UIA1 |
|
– Integrity protection initialisation number |
SS selects an arbitrary 32 bits number for FRESH. The first/ leftmost bit of the bit string contains the most significant bit of the FRESH. |
|
New U-RNTI |
|
|
– SRNC identity |
0000 0000 0010B |
|
– S-RNTI |
0000 0000 0000 0000 0001B |
UTRAN MOBILITY INFORMATION CONFIRM (Step 6)
Check that the UE uses the same message sub-type found in TS 34.108 clause 9.
SIGNALLING CONNECTION RELEASE INDICATION (Step 7)
|
Information Element |
Value/remark |
|
Message Type |
|
|
Integrity check info |
|
|
– Message authentication code |
This IE is checked to see if it is present. The value is compared against the XMAC-I value computed by SS. The first/ leftmost bit of the bit string contains the most significant bit of the MAC-I. |
|
– RRC Message sequence number |
This IE is checked to see if it is present. The value is used by SS to compute the XMAC-I value. |
|
CN domain identity |
Check to see if this value is the same as in the UPLINK DIRECT TRANSFER message. |
8.1.9a.5 Test requirement
After step 1 the UE shall transmit UPLINK DIRECT TRANSFER messages using AM on DCCH.
After step 5, the UE shall transmit UTRAN MOBILITY INFORMATION CONFIRM message using uplink DCCH on AM RLC.
After step 6 the UE shall re-transmit a SIGNALLING CONNECTION RELEASE INDICATION message which includes the same CN domain identity as that found in the UPLINK DIRECT TRANSFER message.