26.14.4 VGCS-VBS / Uplink Access and Uplink Reply Procedures

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

26.14.4.1 VGCS-VBS / Uplink Access / uplink investigation

26.14.4.1.1 Conformance requirement

1. On receipt of a request from the upper layer to access the uplink and the uplink is free the MS shall start the uplink access procedure.

2. The uplink is not free when receipt of request from the upper layer to access the uplink, and before the Timer T3128 expiring the uplink is still not free, the MS shall remain in group receive mode and indicate a reject of the uplink request to the upper layer.

Reference(s)

3GPP TS 04.08 / 3GPP TS 44.018 subclause 3.3.1.2.1.1.

26.14.4.1.2 Test purpose

To verify that:

1. The MS starts the uplink access procedure on receipt of a request from the user to access the uplink and the uplink is free.

2. The MS remains in group receive mode and indicates a reject of the uplink request to the user till Timer T3128 expiring.

26.14.4.1.3 Method of test

Initial Conditions

System Simulator:

1 cell with default parameters for ASCI testing.

Mobile Station:

The MS is in group receive mode.

Specific PICS statements:

PIXIT Statements:

– Way to configure VGCS.

– Way to indicate uplink granted/rejected.

– Way to accept a VGCS.

– Way to request uplink.

Foreseen Final State of the MS

"Idle, updated", with TMSI allocated.

Test Procedure

The MS is brought into group receive mode. The SS indicates uplink free to the MS. The MS is requested to access uplink by MMI action. It is checked that the MS initiates the uplink access procedure. The request is not granted (a VGCS UPLINK GRANT to irrelevant request reference and an UPLINK BUSY message). It is checked that the MS remains in group receive mode. The MS is requested to access uplink by MMI action. It is checked that the MS does not send UPLINK ACCESS message and indicates uplink access rejected.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

0

MS

the MS is in group receive mode.

1

SS -> MS

UPLINK FREE

Uplink access request set to ‘L’.

2

MS

MMI action to request uplink access.

3

MS -> SS

UPLINK ACCESS

4

MS -> SS

UPLINK ACCESS

5

SS -> MS

UPLINK BUSY

6

SS -> MS

VGCS UPLINK GRANT

request reference different from those in step 3 and 4.

7

MS

check that the MS indicates rejection of uplink request and check that the TCH in downlink is still through connected and there is no uplink transmission on that channel for 10 s.

10

MS

MMI action to request uplink access.

11

SS

check that there is no UPLINK ACCESS messages for 2 s.

12

MS

check that the MS indicates the access rejection to the user.

13

SS -> MS

CHANNEL RELEASE

UI format

26.14.4.2 Uplink Access / uplink access procedure

26.14.4.2.1 Conformance requirement

1. The mobile station shall send UPLINK ACCESS messages on the voice group call channel with the appropriate establishment cause. The first UPLINK ACCESS message shall be transmitted by the mobile station with a random delay between 0 and 20ms. The UPLINK ACCESS messages shall be repeated after a further period of 100ms plus a random delay between 0 and 20ms.

2. At expiration of timer T3130, the mobile station shall repeat the uplink access procedure if the uplink is free. A maximum of three attempts is allowed and after that a rejection of the uplink request is indicated to the upper layers.

3. When receiving a UPLINK BUSY or a VGCS UPLINK GRANT message aimed to another mobile station (i.e. not corresponding to one of its UPLINK ACCESS messages), the mobile station shall stop sending UPLINK ACCESS message and remain in group receive mode and shall indicate a rejection of the uplink request to the upper layers.

4. On receipt of an VGCS UPLINK GRANT message corresponding to one of its UPLINK ACCESS messages, the mobile station stops T3130, stops sending UPLINK ACCESS messages, and establishes the main signalling link with an SABM containing the TALKER INDICATION message in the information field. Controlled early classmark sending shall be performed. If a UA is received containing the message sent, the mobile station enters group transmit mode and indicates the successful seizure of the uplink to the upper layer.

5. If an uplink identity code (UIC) of the current cell has been provided by the network in the UPLINK FREE message, the mobile station shall use this UIC IE for the coding of the UPLINK ACCESS messages . If no UIC is provided, the mobile station shall use the BSIC received from the current cell, for instance from the initial synchronisation.

Reference(s)

3GPP TS 04.08 / 3GPP TS 44.018 subclause 3.3.1.2.1.2.

3GPP TS 03.68 subclause 11.3.7.

3GPP TS 05.03 subclause 4.6.

26.14.4.2.2 Test purpose

To verify that:

1. When a request to talk is made by the user and the uplink has been free the MS in group receive mode sends UPLINK ACCESS messages on the voice group call channel with the appropriate establishment cause.

2. The first UPLINK ACCESS message is transmitted by the MS with a random delay between 0 and 20 ms. The UPLINK ACCESS messages is repeated after a further period of 100ms plus a random delay between 0 and 20 ms.

3. At expiration of timer T3130, the MS repeats the uplink access procedure if the uplink is free and maximum of attempts is three. After three failed attempts a rejection of the uplink request is indicated.

4. The MS stops sending UPLINK ACCESS message and remains in group receive mode and indicates a rejection of the uplink request when receiving a UPLINK BUSY or a VGCS UPLINK GRANT message aimed to another mobile station (i.e., not corresponding to one of its UPLINK ACCESS messages).

5. On receipt of an VGCS UPLINK GRANT message corresponding to one of its UPLINK ACCESS messages, the MS stops T3130, stops sending UPLINK ACCESS messages, and establishes the main signalling link with an SABM containing the TALKER INDICATION message in the information field. Controlled early classmark sending is performed. If a UA is received containing the message sent, the MS enters group transmit mode and indicates the successful uplink seizure.

6. If an uplink identity code (UIC) of the current cell has been provided by the network in the UPLINK FREE message, the mobile station shall use this UIC IE for the coding of the UPLINK ACCESS messages . If no UIC is provided, the mobile station shall use the BSIC received from the current cell, for instance from the initial synchronisation.

26.14.4.2.3 Method of test

Initial Conditions

System Simulator:

1 cell with default parameters for ASCI testing.

Mobile Station:

The MS is in group receive mode.

Specific PICS statements:

PIXIT Statements:

– Way to configure VGCS.

– Way to indicate uplink granted/rejected.

– Way to accept a VGCS.

Way to request uplink.

Foreseen Final State of the MS

"Idle, updated", with TMSI allocated.

Test Procedure

The MS is brought into group receive mode. The SS sends UPLINK FREE without UIC. The MS is made to access uplink. It is checked that the MS initiates uplink access procedure with correct establishment cause and with random delay for transmissions and retransmissions and that the access bursts are coded with BSIC. The SS does not respond to the access request. It is checked that the MS repeats the same procedure three times, after three attempts it indicates access rejection and remains in group receive mode.

The SS sends UPLINK FREE with UIC. The MS is made to access uplink. It is checked that the access bursts are coded with UIC. After the second UPLINK ACCESS message, the SS responds with VGCS UPLINK GRANT aimed to another MS and UPLINK BUSY messages. It is checked that the MS stops sending UPLINK ACCESS, remains in group receive mode and indicates uplink access rejection. The SS sends UPLINK FREE. The MS is made to access uplink. The SS sends a message on the downlink SACCH. It is checked that the MS stops sending UPLINK ACCESS for 10 s, then the SS sends another SACCH message. It is checked that the MS is back to group receive mode and indicates access rejection. The MS is made to access uplink. The SS accepts the request. It is checked that the MS establishes the main signalling link correctly, enters group transmit mode and indicates the successful seizure of uplink.

Maximum Duration of Test

5 minutes.

Expected Sequence

Step

Direction

Message

Comments

0

MS

The MS is in group receive mode.

1

SS -> MS

UPLINK FREE

Uplink access request set to ‘L’. UIC indication set to ‘L’.

2

MS

MMI action to request uplink access.

3

MS -> SS

UPLINK ACCESS

check that establishment cause is "Subsequent talker uplink request" and this access burst is coded with BSIC.

4

MS -> SS

UPLINK ACCESS

check that the interval between this burst and the one in step 3 is 100ms plus a value between 0 and 20ms.

5

MS -> SS

UPLINK ACCESS

check that the interval between this burst and the one in step 3 is 5s plus a value between 0 and 20ms.

6

MS -> SS

UPLINK ACCESS

check that the interval between this burst and the one in step 5 is 100ms plus a value between 0 and 20ms, and the interval is different from the interval in step 4.

7

MS -> SS

UPLINK ACCESS

check that the interval between this burst and the one in step 5 is 5s plus a value between 0 and 20ms, and the interval is different from the interval in step 5.

8

MS -> SS

UPLINK ACCESS

check that the interval between this burst and the one in step 7 is 100ms plus a value between 0 and 20ms, and the interval is different from the intervals in step 4 and step 6.

9

MS

check that there is no more UPLINK ACCESS, and that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. The MS indicates also a rejection of the uplink request.

10

SS -> MS

UPLINK FREE

containing UIC.

11

MS

MMI action to request uplink access.

12

MS -> SS

UPLINK ACCESS

13

MS -> SS

UPLINK ACCESS

14

SS -> MS

VGCS UPLINK GRANT

request reference different from step 12 and 13

15

SS

check that within 1 second the MS does not send further UPLINK ACCESS.

16

SS -> MS

UPLINK BUSY

this message sent 0.9 s. after step 14.

17

MS

check that the MS indicates a rejection of the uplink request and that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s..

18

SS -> MS

UPLINK FREE

19

MS

MMI action to request uplink access.

20

MS -> SS

UPLINK ACCESS

21

MS -> SS

UPLINK ACCESS

22

SS -> MS

UPLINK BUSY

23

SS

check that there is no more UPLINK ACCESS, and that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. The MS indicates also a rejection of the uplink request.

24

SS -> MS

UPLINK FREE

26

MS

MMI action to request uplink access.

27

MS -> SS

UPLINK ACCESS

28

MS -> SS

UPLINK ACCESS

29

SS -> MS

UPLINK BUSY

30

SS -> MS

VGCS UPLINK GRANT

Reference to step 27

31

MS -> SS

TALKER INDICATION

L2: SABM / UA

32

SS -> MS

AUTHENTICATION REQUEST

33

MS -> SS

AUTHENTICATION RESPONSE

34

SS -> MS

CIPHERING MODE COMMAND

no ciphering

35

MS -> SS

CIPHERING MODE COMPLETE

36

MS

Check that the TCH is through connected and the MS gives indication to the user.

37

SS -> MS

CHANNEL RELEASE

The MS may send a DISC (step 38) without performing a layer 2 acknowledgement of the CHANNEL RELEASE message.

38

MS -> SS

DISC

The MS shall send at least 2 L2 DISC frames, to which the SS does not respond. After a period of 2 seconds, the SS verifies for 3 seconds that the MS does not produce any further Layer 2 messages.

26.14.4.3 VGCS-VBS / Uplink Reply in VGCS receive mode

26.14.4.3.1 Conformance requirement

1. On receipt of an UPLINK FREE message with an uplink access request indication from the network on the voice group call channel downlink, the mobile station shall send two UPLINK ACCESS messages on the voice group call channel with the appropriate establishment cause and then stop immediately transmitting on the uplink.

2. The first UPLINK ACCESS message shall be transmitted by the mobile station with a random delay between 0 and 20 ms. The second UPLINK ACCESS messages shall be repeated after a further period of 100 ms plus a random delay between 0 and 20 ms.

3. If an uplink identity code (UIC) of the current cell has been provided by the network in the UPLINK FREE message, the mobile station shall use this UIC for the coding of the UPLINK ACCESS messages. If no UIC is provided, the mobile station shall use the BSIC received of the serving cell, for instance as received from the initial synchronisation.

Reference(s)

3GPP TS 04.08 / 3GPP TS 44.018 subclause 3.4.15.1.3.

26.14.4.3.2 Test purpose

To verify that when the MS is in group receive mode:

1. On receipt of an UPLINK FREE message with an uplink access request indication from the network on the voice group call channel downlink, the MS sends two UPLINK ACCESS messages on the voice group call channel with the appropriate establishment cause and then stops immediately transmitting on the uplink.

2. The first UPLINK ACCESS message is transmitted by the MS with a random delay between 0 and 20 ms. The second UPLINK ACCESS messages is repeated after a further period of 100 ms plus a random delay between 0 and 20 ms.

3. If an uplink identity code (UIC) of the current cell has been provided by the network in the UPLINK FREE message, the MS uses this UIC for the coding of the UPLINK ACCESS messages. If no UIC is provided, the MS uses the BSIC received of the serving cell, for instance as received from the initial synchronisation.

26.14.4.3.3 Method of test

Initial Conditions

System Simulator:

1 cell with default parameters for ASCI testing.

Mobile Station:

The MS is in group receive mode.

Specific PICS statements:

PIXIT Statements:

– Way to configure VGCS.

– Way to indicate uplink granted/rejected.

– Way to accept a VGCS call.

– Way to request uplink.

Foreseen Final State of the MS

"Idle, updated", with TMSI allocated.

Test Procedure

The MS is in (VGCS) group receive mode. The SS sends UPLINK FREE message with Uplink Access Request Indication Information Element but without UIC Information Element. It is checked that the MS sends two UPLINK ACCESS messages in correct scheduling and the L1 coding of the messages is with BSIC. The SS sends UPLINK FREE containing Uplink Access Request Indication Information Element and UIC Information Element. It is checked that the MS sends two UPLINK ACCESS messages in correct scheduling and the L1 coding of the messages is with UIC.

Maximum Duration of Test

Expected Sequence

Step

Direction

Message

Comments

0

MS

The MS is in group receive mode.

1

SS -> MS

UPLINK FREE

Uplink access request set to ‘H’. UIC indication set to ‘L’.

2

MS -> SS

UPLINK ACCESS

check that the establishment cause is "Reply on uplink access request" and the L1 coding is with BSIC

3

MS -> SS

UPLINK ACCESS

check that the burst and the one in step 2 is 100ms plus a value between 0 and 20ms, and check that the L1 coding is with BSIC.

4

SS -> MS

UPLINK FREE

with "uplink access request indication" and UIC.

5

MS -> SS

UPLINK ACCESS

check that the establishment cause is "Reply on uplink access request" and the L1 coding is with UIC

6

MS -> SS

UPLINK ACCESS

check that the burst and the one in step 5 is 100ms plus a value between 0 and 20ms; the interval is different from the intervals in step 2 and step 3, and check that the L1 coding is with UIC.

7

SS -> MS

CHANNEL RELEASE

UI format.