26.6.7 Test of the channel mode modify procedure

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

The channel mode modify procedure allows the network to request the MS to change the channel mode for one channel. If the mobile station does not correctly respond to the CHANNEL MODE MODIFY message (with a positive acknowledgement if the new channel mode is supported, with a negative acknowledgement if the new channel mode is not supported), the network may try to repeat the procedure, release the connection, or continue to wait for the acknowledgement (the maximum time resulting from layer two re-transmissions and MS reaction time being around 5 s).

26.6.7.1 Test of the channel mode modify procedure / full rate

26.6.7.1.1 Conformance requirement

When the MS has received the CHANNEL MODE MODIFY message, the mobile station changes the mode for the indicated channel and then replies by a CHANNEL MODE MODIFY ACKNOWLEDGE message indicating the new channel mode.

If the mobile station does not support the indicated mode, it shall retain the old mode and return the associated channel mode information in the CHANNEL MODE MODIFY ACKNOWLEDGE message.

References

3GPP TS 04.08 / 3GPP TS 44.018, subclauses 3.4.6.1.2 and 3.4.6.1.3

26.6.7.1.2 Test purpose

To verify that the MS, in an RR connected state, acknowledges a CHANNEL MODE MODIFY message by sending a CHANNEL MODE MODIFY ACKNOWLEDGEMENT message specifying and switching to the correct mode.

– the new mode if that mode is supported.

– the old mode if the new mode is not supported.

This shall be verified for the channel modes

– signalling only.

– speech full rate version 1.

– data 9,6 Kb/s.

– data 4,8 Kb/s full rate.

– data 2,4 Kb/s full rate.

26.6.7.1.3 Method of test

Initial Conditions

System Simulator:

1 cells, default parameters.

Mobile Station:

The MS is "idle updated", with TMSI allocated.

Specific PICS statements

  • GSM FR (TSPC_AddInfo_Full_rate_version_1)
  • 9.6 k full rate data mode (TSPC_AddInfo_96Data)
  • 4.8 k full rate data mode (TSPC_AddInfo_48DataF)
  • 2.4 k full rate data mode (TSPC_AddInfo_24DataF)

PIXIT statements

Foreseen Final State of the MS

"Idle, updated", with TMSI allocated.

Test procedure

A Mobile Terminated call is initiated , however following the Channel Request received from the Mobile Station, the SS sends an Immediate Assignment to the MS commanding it to go to a TCH/F. This sets the Channel Mode automatically to "Signalling Only".

The SS then sends a series of CHANNEL MODE MODIFY messages to the MS. Each time it is checked that the MS responds with a CHANNEL MODE MODIFY ACKNOWLEDGE message specifying:

– the channel mode that has been specified in the CHANNEL MODE MODIFY message, if the MS supports that mode (this mode then becomes the "channel mode in use");

– the channel mode that was in use when the CHANNEL MODE MODIFY message has been received, if the MS does not support the channel mode specified in the CHANNEL MODE MODIFY message.

Maximum Duration of Test

30 s.

Expected Sequence

Step

Direction

Message

Comments

1

SS->MS

PAGING REQUEST TYPE 1

Sent on correct paging subchannel.

2

MS->SS

CHANNEL REQUEST

Establishment cause indicates "answer to paging".

3

SS->MS

IMMEDIATE ASSIGNMENT

Assignment to a non hopping TCH/F.

4

MS->SS

PAGING RESPONSE

5

SS->MS

CHANNEL MODE MODIFY

6

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

7

SS->MS

CHANNEL MODE MODIFY

8

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

9

SS->MS

CHANNEL MODE MODIFY

10

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

11

SS->MS

CHANNEL MODE MODIFY

12

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

13

SS->MS

CHANNEL MODE MODIFY

14

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

15

SS->MS

CHANNEL RELEASE

Specific Message Contents

CHANNEL MODE MODIFY

Information Element

value/remark

Channel description

describes the already assigned dedicated channel.

Channel mode

Mode

in step 5: speech full rate version 1

in step 7: data 9,6 Kb/s

in step 9: data 4,8 Kb/s full rate

in step 11: data 2,4 Kb/s full rate

in step 13 signalling only

CHANNEL MODE MODIFY ACKNOWLEDGE

Information Element

value/remark

Channel mode

Mode

in step 6:

if TSPC_AddInfo_Full_rate_version_1: speech full rate version 1

else: signalling only

in step 8:

if TSPC_AddInfo_96Data: data 9.6 Kb/s

else: same as in step 6

in step 10:

if TSPC_AddInfo_48DataF: data 4.8 Kb/s full rate

else: same as in step 8

in step 12:

if TSPC_AddInfo_24DataF: data 2.4 Kb/s full rate

else: same as in step 10

in step 14:

signalling only

26.6.7.2 Test of the channel mode modify procedure / half rate

This test is only applicable to an dual rate MS.

26.6.7.2.1 Conformance requirement

When the MS has received the CHANNEL MODE MODIFY message, the mobile station changes the mode for the indicated channel and then replies by a CHANNEL MODE MODIFY ACKNOWLEDGE message indicating the new channel mode.

If the mobile station does not support the indicated mode, it shall retain the old mode and return the associated channel mode information in the CHANNEL MODE MODIFY ACKNOWLEDGE message.

References

3GPP TS 04.08 / 3GPP TS 44.018, subclauses 3.4.6.1.2 and 3.4.6.1.3.

26.6.7.2.2 Test purpose

To verify that the MS, in an RR connected state, acknowledges a CHANNEL MODE MODIFY message by sending a CHANNEL MODE MODIFY ACKNOWLEDGEMENT message specifying and switches to the correct mode:

– the new mode if that mode is supported;

– the old mode if the new mode is not supported.

This shall be verified for the channel modes:

– signalling only;

– speech half rate version 1;

– data 4,8 Kb/s half rate;

– data 2,4 Kb/s half rate;

– speech half rate version 3.

26.6.7.2.3 Method of test

Initial Conditions

System Simulator:

1 cells, default parameters.

Mobile Station:

The MS is "idle updated", with TMSI allocated.

Specific PICS statements

  • GSM HR (TSPC_AddInfo_Half_rate_version_1)
  • 4.8 k half rate data mode (TSPC_AddInfo_48DataH)
  • 2.4 k half rate data mode (TSPC_AddInfo_24DataH)
  • HR AMR (TSPC_AddInfo_Half_rate_version_3)

PIXIT statements

Foreseen Final State of the MS

"Idle, updated", with TMSI allocated.

Test procedure

A Mobile Terminated call is initiated , however following the Channel Request received from the Mobile Station, the SS sends an Immediate Assignment to the MS commanding it to go to a TCH/H. This sets the Channel Mode automatically to "Signalling Only".

The SS then sends a series of CHANNEL MODE MODIFY messages to the MS. Each time it is checked that the MS responds with a CHANNEL MODE MODIFY ACKNOWLEDGE message specifying:

– the channel mode that has been specified in the CHANNEL MODE MODIFY message, if the MS supports that mode (this mode then becomes the "channel mode in use");

– the channel mode that was in use when the CHANNEL MODE MODIFY message has been received, if the MS does not support the channel mode specified in the CHANNEL MODE MODIFY message.

Maximum Duration of Test

30 s.

Expected Sequence

Step

Direction

Message

Comments

1

SS->MS

PAGING REQUEST TYPE 1

Sent on the correct paging subchannel.

2

MS->SS

CHANNEL REQUEST

Establishment cause indicates "answer to paging".

3

SS->MS

IMMEDIATE ASSIGNMENT

Assignment to a non hopping TCH/H.

4

MS->SS

PAGING RESPONSE

5

SS->MS

CHANNEL MODE MODIFY

6

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

7

SS->MS

CHANNEL MODE MODIFY

8

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

9

SS->MS

CHANNEL MODE MODIFY

10

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

11

SS->MS

CHANNEL MODE MODIFY

12

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

13

SS->MS

CHANNEL MODE MODIFY

14

MS->SS

CHANNEL MODE MODIFY ACKNOWLEDGE

15

SS->MS

CHANNEL RELEASE

Specific Message Contents

CHANNEL MODE MODIFY

Information Element

value/remark

Channel description

describes the already assigned dedicated channel.

Channel mode

Mode

in step 5: speech half rate version 1

in step 7: data 4,8 Kb/s half rate

in step 9: data 2,4 Kb/s half rate

in step 11: speech half rate version 3

in step 13: signalling only

Multi-Rate Configuration

Arbitrarily chosen

CHANNEL MODE MODIFY ACKNOWLEDGE

Information Element

value/remark

Channel mode

Mode

in step 6:

if TSPC_AddInfo_Half_rate_version_1: Speech half rate version 1

else: signalling only

in step 8:

if TSPC_AddInfo_48DataH: data 4,8 Kb/s half rate

else: same as in step 6

in step 10:

if TSPC_AddInfo_24DataH: data 2,4 Kb/s half rate

else: same as in step 8

in step 12:

if TSPC_AddInfo_Half_rate_version_3: speech half rate version 3

else: same as in step 10.

in step 14:

signalling only