7.1.12 Off-network / Group Call / Broadcast Group Call / MCPTT User Ack Not Required / Originator Releases Call / Client Terminated (CT)

36.579-23GPPMission Critical (MC) services over LTEPart 2: Mission Critical Push To Talk (MCPTT) User Equipment (UE) Protocol conformance specificationRelease 15TS

7.1.12.1 Test Purpose (TP)

(1)

with { UE (MCPTT Client) registered and authorised for MCPTT Service, including authorised to receive broadcast calls in off-network environment, and the UE (MCPTT Client) is in an off-network environment, and the UE (MCPTT Client) has received a GROUP CALL BROADCAST message }

ensure that {

when { MCPTT User requests the floor }

then { UE (MCPTT Client) does not send a Floor Request message }

}

7.1.12.2 Conformance requirements

References: The conformance requirements covered in the current TC are specified in: TS 24.379 clauses 10.3.2.4.2, 10.3.2.4.8, TS 24.380 clause 7.2.3.2.9. Unless otherwise stated these are Rel-13 requirements.

[TS 24.379, clause 10.3.2.4.2]

When in the "B1: start-stop" state, upon receiving a GROUP CALL BROADCAST message with the Call identifier IE not matching any in-progress broadcast group call, the MCPTT client:

1) shall store the value of the Call identifier IE of the GROUP CALL BROADCAST message as the call identifier of the call;

2) shall store the value of the Call type IE of the GROUP CALL BROADCAST message as the received current call type;

3) shall store the value of the SDP IE of the GROUP CALL BROADCAST message as the SDP body of the call;

4) shall store the value of the Originating MCPTT user ID IE of the GROUP CALL BROADCAST message as the originating MCPTT user ID of the call;

5) shall store the value of the MCPTT group ID IE of the GROUP CALL BROADCAST message as the MCPTT group ID of the call;

6) if the terminating UE is configured that the terminating MCPTT user acknowledgement is required upon a terminating call request reception:

i) shall start timer TFB3 (waiting for the user); and

ii) shall enter the "B3: pending user action" state; and

7) if the terminating UE is configured that the terminating MCPTT user acknowledgement is not required upon a terminating call request reception:

i) shall establish a media session based on the stored SDP body of the call;

ii) shall start floor control as terminating floor participant as specified in subclause 7.2 in 3GPP TS 24.380 [5];

iii) shall start timer TFB1 (max duration); and

iv) shall enter the "B2: in-progress broadcast group call" state.

[TS 24.379, clause 10.3.2.4.8]

When in the "B2: in-progress broadcast group call" state or "B4: ignoring same call ID" state, upon receiving GROUP CALL BROADCAST END message with the same Call identifier IE as the stored call identifier, the MCPTT client:

1) shall release media session;

2) shall stop timer TFB1 (max duration);

3) shall clear the stored call identifier;

4) shall stop floor control, if running; and

5) shall enter the "B1: start-stop" state.

[TS 24.380, clause 7.2.3.2.9]

When an MCPTT broadcast call is established the terminating floor participant:

1. shall create an instance of a floor participant state transition diagram for basic operation state machine;

2. shall start timer T203 (End of RTP media); and

3. shall enter ‘O: has no permission’ state.

NOTE: In MCPTT broadcast call, only originating MCPTT user is allowed to request floor and transmit media. A Floor Request message is locally denied to terminating MCPTT user, if requested.

7.1.12.3 Test description

7.1.12.3.1 Pre-test conditions

System Simulator:

– SS-UE1 (MCPTT client)

– For the underlying "transport bearer" over which the SS and the UE will communicate, the SS is behaving as SS-UE1 as defined in TS 36.508 [24], configured for and operating as ProSe Direct Communication transmitting and receiving device.

– GNSS simulator to simulate a location and provide a timing reference for the assistance of E-UTRAN off-network testing.

NOTE 1: For operation in off-network environment, it needs be ensured that after the UE is powered up it considers the Geographical area #1 that is simulated by the GNSS simulator as being one of the geographical areas set in the USIM for operation when UE is "not served by E-UTRAN".

– SS-NW (MCPTT server)

– For the underlying "transport bearer" over which the SS and the UE will communicate Parameters are set to the default parameters for the basic E-UTRA Single cell network scenarios, as defined in TS 36.508 [24] clause 4.4. The simulated Cell 1 shall belong to PLMN1 (the PLMN specified for MCPTT operation in the MCPTT configuration document).

NOTE 2: The SS operation as NW (MCPTT server) is needed only for the Preamble if the UE has to perform the MCPTT User performs the Generic Test Procedure for MCPTT Authorization/Configuration and Key Generation as specified in TS 36.579-1 [2], subclause 5.3.2.

IUT:

– UE (MCPTT client)

– The test USIM set as defined in TS 36.579-1 [2], subclause 5.5.10 is inserted.

– For the underlying "transport bearer" over which the SS and the UE will communicate, the UE is behaving as a ProSe enabled UE as defined in TS 36.508 [24], configured for and operating as ProSe Direct Communication transmitting and receiving device.

Preamble:

– The UE has performed the Generic Test Procedure for MCPTT UE registration as specified in TS 36.579-1 [2], subclause 5.4.2.

– TFG4 (waiting for the user) set to 0 (a value to suit the test case sequence) ("/<x>/OffNetwork/Timers/TFB1" leaf node present in the UE initial configuration as specified in 3GPP TS 24.483 [13])

– The MCPTT User performs the Generic Test Procedure for MCPTT Authorization/Configuration and Key Generation as specified in TS 36.579-1 [2], subclause 5.3.2.

– The GNSS simulator is configured to simulate a location in the centre of Geographical area #1 and provide a timing reference, as defined in TS 36.508 [24] Table 4.11.2-2 scenario #1.

– The UE is switched-off.

– UE States at the end of the preamble

– The UE is in state ‘switched-off’.

7.1.12.3.2 Test procedure sequence

Table 7.1.12.3.2-1: Main Behaviour

St

Procedure

Message Sequence

TP

Verdict

U – S

Message

1

Power up the UE

–

–

–

–

1A

Trigger the UE to reset UTC time and location.

NOTE: The UTC time and location reset may be performed by MMI or AT command (+CUTCR).

–

–

–

–

2

Activate the MCPTT Client Application and register User A as the MCPTT User (TS 36.579-5 [5], px_MCPTT_User_A_username, px_MCPTT_User_A_password).

(NOTE 1)

–

–

–

–

–

EXCEPTION: The E-UTRA/EPC actions which are related to the MCPTT call establishment are described in TS 36.579-1 [2], subclause 5.4.10 ‘Generic Test Procedure for MCPTT CT communication over ProSe direct one-to-many communication out of E-UTRA coverage / Announcing/Discoveree procedure for group member discovery / One-to-many communication’. The test sequence below shows only the MCPTT relevant messages exchanged.

–

–

–

–

3

SS-UE1 (MCPTT client) sends a GROUP CALL BROADCAST

(NOTE 2)

<–

GROUP CALL BROADCAST

–

–

3A

Make the UE (MCPTT User) request the floor

(NOTE 1), (NOTE 3)

4

Check: Does the UE (MCPTT Client) send in the next 5 seconds a Floor Request message to the floor participants?

–>

Floor Request

1

F

5

Wait 5 seconds for the Floor Request message

6

SS-UE1 (MCPTT client) sends a GROUP CALL BROADCAST END

(NOTE 4)

<–

GROUP CALL BROADCAST END

–

–

NOTE 1: This is expected to be done via a suitable implementation dependent MMI.

NOTE 2: Timer TFB1 (max duration) is started by the MCPTT Client upon the receiving of the GROUP CALL BROADCAST message. Timer TFB1 (max duration)=300s, as defined in TS 36.579-1 [2], Table 5.5.8.1-1. At the expire of TFB1 (max duration), the MCPTT Client will terminate participation in the broadcast call.

NOTE 3: It is possible that the MCPTT Client may not allow the MCPTT User to request the floor.

NOTE 4: Timer TFB1 (max duration) is stopped by the MCPTT Client upon the receiving of the GROUP CALL BROADCAST END message.

7.1.12.3.3 Specific message contents

None