8.1.9e Signalling Connection Release Indication in CELL_PCH state when the upper layers of the UE indicate that there is no more PS data for a prolonged period/V316 in use
34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification
8.1.9e.1 Definition
The UE behaves correctly when in CELL_PCH and the upper layers of the UE indicate that there is no more PS data for a prolonged period.
8.1.9e.2 Conformance requirement
In addition, if the timer T323 value is stored in the IE "UE Timers and constants in connected mode" in the variable TIMERS_AND_CONSTANTS, and if there is no CS domain connection indicated in the variable ESTABLISHED_SIGNALLING_CONNECTIONS, the UE may:
1> if the upper layers indicate that there is no more PS data for a prolonged period:
2> if timer T323 is not running:
3> if the UE is in CELL_DCH state or CELL_FACH state; or
3> if the UE is in CELL_PCH state or URA_PCH state and the DRX cycle length in use is shorter than the shorter CN domain specific DRX cycle length for the PS domain and CS domain; or
3> if the UE is in CELL_PCH state or URA_PCH state and the DRX cycle length in use is equal to or longer than the shorter CN domain specific DRX cycle length for the PS domain and CS domain, and V316 < 1:
4> if the UE is in CELL_PCH state or URA_PCH state and the DRX cycle length in use is equal to or longer than the shorter CN domain specific DRX cycle length for the PS domain and CS domain:
5> increment V316 by 1.
4> set the IE "CN Domain Identity" to PS domain;
4> set the IE "Signalling Connection Release Indication Cause" to "UE Requested PS Data session end";
4> transmit a SIGNALLING CONNECTION RELEASE INDICATION message on DCCH using AM RLC;
4> start the timer T323;
3> the procedure ends.
The UE shall be inhibited from sending the SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end" whilst timer T323 is running.
The UE shall not locally release the PS signalling connection after it has sent the SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
At transmission or reception of PS data or signalling on SRB3 or upwards, or entering RRC Connected mode, or successful SRNS relocation, the UE shall set V316 to zero.
…
When timer T323 expires:
1> the UE may determine whether any subsequent indications from upper layers that there is no more PS data for a prolonged period in which case it triggers the transmission of a single SIGNALLING CONNECTION RELEASE INDICATION message according with clause 8.1.14.2;
1> the procedure ends.
Reference
3GPP TS 25.331 clause 8.1.14.2, 8.1.14.4
8.1.9e.3 Test purpose
1. To confirm that when the UE is in CELL_PCH state and the DRX cycle length in use is equal to or longer than the shorter CN domain specific DRX cycle length for the PS domain and CS domain, and V316 >= 1 the UE does not send the SIGNALLING CONNECTION RELEASE INDICATION with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
8.1.9e.4 Method of test
Initial Condition
System Simulator: 1 cell.
UE:
The UE is in state CELL_PCH (state 6-12) as specified in clause 7.4 of TS 34.108. PDP context is activated.
T323 is not running and V316=0.
Test Procedure
The upper layers of the UE indicate that there is no more PS data for a prolonged period.
The UE transitions to CELL_FACH state and transmits a CELL UPDATE message with the cause set to "uplink data transmission" in IE "Cell update cause".
The SS sends a CELL UPDATE CONFIRM message to the UE with the RRC state indicator set to CELL_FACH and a new C-RNTI.
The UE transmits a UTRAN MOBILITY INFORMATION CONFIRM and stays in CELL_FACH state.
The UE transmits a SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end" on DCCH using AM RLC and starts timer T323. V316 is incremented.
The SS sends a RADIO BEARER RECONFIGURATION message to the UE with RRC State Indicator set to CELL_PCH. The UE sends a RADIO BEARER RECONFIGURATION COMPLETE message to the SS and transitions to CELL_PCH state.
After timer T323 expires the upper layers of the UE are triggered to indicate that there is no more PS data for a prolonged period.
The SS waits 10s. The UE shall not transmit a SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
The SS confirms that the UE is in CELL_PCH state.
The SS releases the RRC connection.
Expected sequence
|
Step |
Direction |
Message |
Comment |
|
|
UE |
SS |
|||
|
1 |
The UE is triggered to indicate that there is no more PS data for a prolonged period. (Note 1) (V316=0) |
|||
|
2 |
|
CELL UPDATE |
The UE moves to CELL FACH state and transmit this message which is set to "uplink data transmission" in IE "Cell update cause". |
|
|
3 |
|
CELL UPDATE CONFIRM |
Includes C-RNTI |
|
|
4 |
|
UTRAN MOBILITY INFORMATION CONFIRM |
||
|
5 |
|
SIGNALLING CONNECTION RELEASE INDICATION |
IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end". The message is sent on DCCH using AM/RLC. (V316 is incremented by 1 and T323 is started) |
|
|
6 |
|
RADIO BEARER RECONFIGURATION |
RRC State Indicator = CELL_PCH |
|
|
7 |
|
RADIO BEARER RECONFIGURATION COMPLETE |
||
|
8 |
After T323 expires, the UE is triggered to indicate that there is no more PS data for a prolonged period. (Note 1) |
|||
|
9 |
Wait for 10s. |
|||
|
10 |
CALL C.4 |
If the test result of C.4 indicates that UE is in CELL_PCH state, the test passes, otherwise it fails. |
||
|
Note 1: This indication may be triggered with the AT command +CNMPSD or any alternative way |
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Specific Message Content
System Information Block type 1 (preamble)
Use the default system information block with the same type specified in clause 6.1 of TS 34.108, with the following exceptions:
|
Information Element |
Value/remark |
|
– UE Timers and constants in connected mode |
|
|
– T323 |
s5 |
PHYSICAL CHANNEL RECONFIGURATION ( procedure 6-12 preamble)
|
Information Element |
Value/remark |
|
UTRAN DRX cycle length coefficient |
7 |
CELL UPDATE (Step 2)
The same message found in TS 34.108 clause 9 shall be transmitted by the UE on the uplink CCCH, with the exception of the following IEs:
|
Information Element |
Value/remark |
|
Cell Update Cause |
Check to see if set to ‘uplink data transmission’ |
CELL UPDATE CONFIRM(Step 3)
|
Information Element |
Value/remark |
|
RRC State Indicator |
CELL_FACH |
|
New C-RNTI |
‘1010 1010 1010 1010’ |
SIGNALLING CONNECTION RELEASE INDICATION on DCCH(Step 5)
|
Information Element |
Value/remark |
|
CN information elements |
|
|
CN domain identity |
PS domain |
|
Signalling Connection Release Indication Cause |
UE Requested PS Data session end |
RADIO BEARER RECONFIGURATION (Step 6)
|
Information Element |
Value/remark |
|
RRC State Indicator |
CELL_PCH |
|
Cell id |
Cell id of Cell 1 |
|
Frequency info |
Not present |
8.1.9e.5 Test requirement
In Step 5 the UE transmits the SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end" on DCCH using RLC AM.
After Step 5 the UE does not transmit the SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
At Step 10 procedure C.4 confirms that the UE is in CELL_PCH state.