26.14.8 VGCS-VBS / Structured Procedures
3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS
The objective of this test group is to verify that the MS in the ASCI context performs certain elementary procedures of the RR, MM, and GCC/BCC protocol correctly within a structured procedure, especially when some channels use R‑GSM frequencies with ARFCNs between 955 and 974 or ER-GSM frequencies with ARFCNs between 940 and 974.
26.14.8.1 VGCS-VBS / Structured Procedures / Very early and early assignment
26.14.8.1.1 Conformance requirement
1. The mobile station initiates immediate assignment, service request, and contention resolution.
2. After sending the CIPHERING MODE COMPLETE message, the mobile station initiates call establishment by sending the SETUP message to the network.
3. The network allocates a traffic channel to the mobile station before it initiates call establishment in the fixed network.
4. The network assigns the traffic channel at the earliest possible moment, i.e. in the immediate assignment procedure. The mode of the traffic channel is changed from signalling only to the mode necessary for the call by means of the channel mode change procedure.
Reference(s)
3GPP TS 04.08 / 3GPP TS 23.108 subclause 7.3.2.
26.14.8.1.2 Test purposes
1. To verify that the MS initiates immediate assignment, service request using the IMMEDIATE ASSIGNMENT or CM SERVICE REQUEST message, and contention resolution.
2. To verify that the MS after sending the CIPHERING MODE COMPLETE message, initiates call establishment by sending the SETUP message to the network.
3. To check that the MS performs correctly the early assignment procedure.
4. To check that the MS performs correctly the very early assignment procedure.
26.14.8.1.3 Method of test
Initial Conditions
System Simulator:
1 cell with default parameters for ASCI testing.
Mobile Station:
The MS is in MM-state "idle, updated" with a TMSI allocated.
Specific PICS statements:
– Support eMLPP (TSPC_Serv_eMLPP)
– Support of Half Rate Speech (TSPC_AddInfo_Half_rate_version_1)
– Support of Enhanced Full Rate Speech (Full Rate Version 2) (TSPC_AddInfo_Full_rate_version_2)
– Support of R-GSM Band (TSPC_Type_GSM_R_Band)
– Support of ER-GSM Band (TSPC_Type_ER_GSM_Band)
PIXIT Statements:
– Way to configure a necessary radio channel rate.
– Way to configure VGCS or VBS.
– Way to select the immediate set-up or the normal set-up.
– Way to verify the downlink speech path.
Foreseen Final State of the MS
"Idle, updated", with TMSI allocated.
Test Procedure
The MS is requested to initiate a VGCS/VBS call using immediate setup procedure. The authentication and ciphering mode setting (to no ciphering) procedures are applied. The call is established by using early assignment procedure. For an R-band MS a carrier with ARFCN in the rage of 955 – 974 is assigned for the traffic channel. The MS needs to be configured to use EFR codec for the test, if it supports EFR. The MS is requested to terminate the call.
The MS is requested to initiate a VGCS/VBS call using setup procedure. The authentication and ciphering mode setting (to no ciphering) procedures are applied. The call is established by using assignment procedure.
For an R- GSM band MS a carrier with ARFCN in the rage of 955 – 974 is assigned for the traffic channel.
For an ER-GSM band MS a carrier with ARFCN in the range of 940 – 974 is assigned for the traffic channel.
The MS needs to be configured to use half rate codec for the test, if it supports dual rate. The call is terminated.
Maximum Duration of Test
5 minutes.
Expected Sequence
Steps 0 to 20 are executed if MS supports eMLPP.
Step |
Direction |
Message |
Comments |
0 |
MS |
The MS is in idle updated mode. |
|
1 |
MS |
MMI action to select a priority level 0 and MMI action to initiate VGCS /VBS call using immediate setup procedure. |
|
2 |
MS -> SS |
CHANNEL REQUEST |
|
3 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
4 |
MS -> SS |
IMMEDIATE SETUP |
L2: SABM / UA |
5 |
SS -> MS |
AUTHENTICATION REQUEST |
|
6 |
MS -> SS |
AUTHENTICATION RESPONSE |
|
7 |
SS -> MS |
CIPHERING MODE COMMAND |
no ciphering |
8 |
MS -> SS |
CIPHERING MODE COMPLETE |
|
9 |
SS -> MS |
ASSIGNMENT COMMAND |
see specific message contents |
10 |
MS -> SS |
ASSIGNMENT COMPLETE |
|
11 |
SS -> MS |
CONNECT |
verify that the TCH is through connected |
12 |
MS |
MMI action to terminate the call |
|
13 |
MS -> SS |
TERMINATION REQUEST |
|
14 |
SS -> MS |
TERMINATION |
cause = protocol error, unspecified |
15 |
SS -> MS |
CHANNEL RELEASE |
The MS releases L2 multiple frame link L2:DISC/UA. |
21 |
MS |
MMI action to initiate VGCS/VBS call with setup procedure. |
|
22 |
MS -> SS |
CHANNEL REQUEST |
TCH/F needed |
23 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
24 |
MS -> SS |
CM SERVICE REQUEST |
L2: SABM / UA |
25 |
SS -> MS |
AUTHENTICATION REQUEST |
|
26 |
MS -> SS |
AUTHENTICATION RESPONSE |
|
27 |
SS -> MS |
CIPHERING MODE COMMAND |
no ciphering |
28 |
MS -> SS |
CIPHERING MODE COMPLETE |
|
29 |
MS -> SS |
SETUP |
|
30 |
SS -> MS |
CHANNEL MODE MODIFY |
|
31 |
MS -> SS |
CHANNEL MODE MODIFY ACKNOWLEDGE |
|
32 |
SS -> MS |
CONNECT |
verify that the TCH is through connected |
33 |
SS -> MS |
TERMINATION |
|
34 |
SS -> MS |
CHANNEL RELEASE |
The MS releases L2 multiple frame link L2:DISC/UA. |
Specific message contents:
Step 9
ASSIGNMENT COMMAND:
Channel Description |
|
– Channel Type and TDMA offset |
TCH/F |
– Timeslot Number |
7 |
– Training Sequence Code |
3 |
– Hopping |
Single RF Channel |
– ARFCN |
957 if the MS supports R-GSM or ER-GSM, otherwise chosen arbitrarily, but not BCCH |
Power Command |
|
– Power level |
Chosen arbitrarily but with a changed value. |
Channel Mode |
speech full rate or half rate version 2 if the MS supports EFR otherwise speech full rate or half rate version 1 |
Other IEs |
Not present |
Step 23
IMMEDIATE ASSIGNMENT:
Channel Description |
|
– Channel Type and TDMA offset |
TCH/H if the MS supports dual rate, otherwise TCH/F |
– Timeslot Number |
3 |
– Training Sequence Code |
3 |
– Hopping |
Single RF Channel |
– ARFCN |
970, if the MS supporting R-band otherwise: GSM 450: 275, GSM 480: 322, GSM 900: 50 DCS 1 800: 750 PCS 1 900: 650 GSM710: 470 GSM 750: 470 T-GSM 810: 470 GSM 850: 177 |