8.1.9d No Signalling connection release indication in CELL_DCH state when the upper layers of the UE indicate that there is no more PS data for a prolonged period, CS connection exists

34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification

8.1.9d.1 Definition

The UE behaves correctly when in CELL_DCH and a CS domain signalling connection exists and the upper layers of the UE indicate that there is no more PS data for a prolonged period.

8.1.9d.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 clauses 8.1.14.2, 8.1.14.4

8.1.9d.3 Test purpose

1. To confirm thatt when 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" after T323 expires when:
– the UE is in CELL_DCH, and
– before T323 expiry and before the CS domain connection is set up the upper layers of the UE indicate that there is no more PS data for a prolonged period, and
– a CS domain connection is set up before T323 expiresy

2. To confirm that when 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" when:
– the UE is in CELL_DCH, and
– a CS domain connection exists, and
– the upper layers of the UE indicate that there is no more PS data for a prolonged.

3. To confirm that when the UE is in CELL_DCH when the upper layers of the UE indicate that there is no more PS data for a prolonged period the UE does not release its PS signalling connection.

8.1.9d.4 Method of test

Initial Condition

System Simulator: 1 cell.

UE: The UE is in state PS-DCCH+DTCH_DCH (state 6-10) as specified in clause 7.4 of TS 34.108.

T323 is not running

Test Procedure

The upper layers of the UE indicate that there is no more PS data for a prolonged period.
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.
Before T323 expires the upper layers of the UE indicate that there is no more PS data for a prolonged period.
Before T323 expires the UE is transitioned to state 6-14 (PS+CS-DCCH+DTCH_DCH) using procedure P24.
Wait 25s to confirm that the UE does not transmits a SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
The upper layers of the UE indicate that there is no more PS data for a prolonged period.
Wait 25s to confirm that the UE does not transmits a SIGNALLING CONNECTION RELEASE INDICATION message with the IE "Signalling Connection Release Indication Cause" set to "UE Requested PS Data session end".
To confirm that the UE has not released its PS signalling connection the SS sends aan IDENTITY REQUEST with IE “Identity type” set to IMSI. The UE answers with aan IDENTITY RESPONSE with the IE “Mobile identity” set to IMSI.
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)

2

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.

3

Before T323 expires the UE is triggered to indicate that there is no more PS data for a prolonged period. (Note 1)

4

Before T323 expires The UE is transitioned to state 6-14 (PS+CS-DCCH+DTCH_DCH) as specified in procedure P24 in clause 7.4.2.9 in TS 34.108

5

Wait 25s.

The UE does not transmit SIGNALLING CONNECTION RELEASE INDICATION message with the IE “Signalling Connection Release Indication Cause” set to “UE Requested PS Data session end”.

6

The UE is triggered to indicate that there is no more PS data for a prolonged period. (Note 1)

7

Wait 25s.

The UE does not transmit SIGNALLING CONNECTION RELEASE INDICATION message with the IE “Signalling Connection Release Indication Cause” set to “UE Requested PS Data session end”.

8

IDENTITY REQUEST

Identity type = IMSI

Message is sent over the PS domain.

9

IDENTITY RESPONSE

Mobile identity = IMSI

Message is received over the PS domain.

10

RRC Connection Release

The SS releases the RRC connection.

11

RRC Connection Release Complete

Note 1: This indication may be triggered with the AT command +CNMPSD or any alternative way.

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

s20

IDENTITY REQUEST (Step 8)

Information Element

Value/remark

Identity type 2

IMSI

IDENTITY RESPONSE (Step 9)

Information Element

Value/remark

Mobile identity

IMSI

8.1.9d.5 Test requirement

After Step 3 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 9 the UE transmits aan IDENTITY RESPONSE message over the PS domain.