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 |