26.14.9 VGCS-VBS / Cell change
3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS
26.14.9.1 VGCS-VBS / Cell Change / Same LA
26.14.9.1.1 Conformance requirement
After cell change within the same LA:
1. if no NCH is present on the new cell the MS shall leave group receive mode and go to idle mode;
2. if NCH is present on the new cell but the MS does not receive any notification message for the current group or broadcast call the MS shall leave group receive mode and go to idle mode;
3. if the MS receives a notification message for the current group or broadcast call with the related channel position and if the channel is found, the MS shall change to it and stay in group receive mode;
4. if the MS receives a notification message for the current group or broadcast call without information on the related channel position, the MS shall leave group receive mode, go to idle mode in order to establish a dedicated connection with the network to become informed on the related channel position.
Reference(s)
3GPP TS 03.22 subclause 5.2.3.
26.14.9.1.2 Test purpose
The MS was in group receive mode. After cell change within a same LA it is verified that:
1. if no NCH is present on the new cell the MS leaves group receive mode and enters idle mode;
2. if NCH is present on the new cell but there is no NOTIFICATION / NCH for the current group or broadcast call the MS leaves group receive mode and enters idle mode;
3. if the MS receives NOTIFICATION / NCH for the current group or broadcast call with the related channel position the MS changes onto the group channel and stays in group receive mode;
4. if the MS receives NOTIFICATION / NCH for the current group or broadcast call without information on the related channel position, the MS leaves group receive mode, enters idle mode and establishes a dedicated connection with the network to get the related channel position.
26.14.9.1.3 Method of test
26.14.9.1.3.1 Initial Conditions
Initial Conditions
System Simulator:
2 cells within a same LA: cell A and cell B, with default parameters for this clause except:
– for k=1, no NCH on cell B;
– for k=2, 3, 4, NCH present on cell B.
Mobile Station:
The MS is in MM-state "idle, updated" with a TMSI allocated. No automatic answering is configured.
Specific PICS statements:
–
PIXIT Statements:
– Way to configure VGCS or VBS.
– Way to verify the downlink speech path.
Foreseen Final State of the MS
"Idle, updated".
Test Procedure
The following test procedure is repeated for k=1, 2, 3, 4 and c=1, 2.
For c=1, the MS is brought into group receive mode on cell A. Start cell B without NCH (k=1), or with NCH but NOTIFICATON/NCH containing irrelevant group call references (k=2), or with NCH whilst NOTIFICATON/NCH containing the relevant group call reference and VGCS/VBS channel description (k=3), or with NCH whilst NOTIFICATON/NCH containing the relevant group call reference but no VGCS/VBS channel description (k=4). Lower the transmission levels of cell A so that C1 of cell A becomes less than zero. After the MS re-selects to the cell B it is checked that the MS returns to idle mode on cell B (for k=1, 2), or that the MS remains in group receive mode on cell B (for k=3, 4).
The same test procedure is repeated for c=2. Instead of lowering the power level of cell A, the SACCH transmission of cell A is stopped.
Maximum Duration of Test
10 minutes.
Expected Sequence
The test sequence is repeated for test counter k= 1, 2, 3, 4 and c=1, 2.
Step |
Direction |
Message |
Comments |
0 |
MS |
the MS is brought into group receive mode on cell A. |
|
1 |
SS |
k=1, SI1 on cell B not indicating NCH position; k=2, 3, 4, SI1 on cell B indicating NCH position |
|
A2 |
k=1 |
||
B2 |
SS -> MS |
NOTIFICATION/NCH |
k=2, sent on cell B, containing an irrelevant group call reference. |
C2 |
SS -> MS |
NOTIFICATION/NCH |
k=3, sent on cell B, containing the relevant group call reference and VGCS/VBS channel description. |
D2 |
SS -> MS |
NOTIFICATION/NCH |
k=4, sent on cell B, with the relevant group call reference but no VGCS/VBS channel description. |
3 |
SS |
for c=1, the RF level of cell A is lowered until the MS re-selects cell B. for c=2, to stop downlink SACCH transmission of cell A. |
|
The following messages are sent and received on cell B. |
|||
A4, B4 |
SS -> MS |
PAGING REQUEST TYPE 1 |
k=1 or k=2, Wait 5s. until the MS is in idle mode on cell B. "Mobile Identity" IE contains the TMSI allocated to the MS. |
A5, B5 |
MS -> SS |
CHANNEL REQUEST |
"Establishment Cause" = Answer to paging. |
A9, B9 |
SS -> MS |
IMMEDIATE ASSIGNMENT REJECT |
the first "request reference" corresponds to the CHANNEL REQUEST sent by the MS. |
C4 |
MS |
k=3, Wait 5s. to ensure that the MS has enough time entering group receive mode on cell B. Check that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. |
|
C9 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle mode. |
D4 |
MS -> SS |
CHANNEL REQUEST |
k=4, |
D5 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
a TCH |
D6 |
MS -> SS |
NOTIFICATION REPONSE |
Respond to notification. |
D7 |
SS -> MS |
CHANNEL RELEASE |
I format, MS leaves the dedicated mode and changes onto VGCS/VBS channel. |
D8 |
MS |
Check that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. |
|
D9 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle state. |
10 |
SS |
For c=1, the RF level of cell A is increased to 63 dBV emf(), the RF level of cell B is lowered until the MS re-select cell A. For c=2, downlink SACCH on cell A is recovered. Wait 5s. |
|
11 |
MS |
Check that the TCH in downlink on cell A is through connected and there is no uplink transmission on that channel for 10 s. |
|
12 |
SS |
The RF level of cell B is increased to 53 dBV emf(). |
|
26.14.9.2 VGCS-VBS / Cell Change / Different LA
26.14.9.2.1 Conformance requirement
1. After a cell change the MS shall leave group receive mode and go to idle mode in order to establish a dedicated connection with the network to perform a location update if the cell belongs to a new LA.
2. If NCH is present on the new cell but the MS does not receive any notification message for the current group or broadcast call the MS shall leave group receive mode and go to idle mode.
3. If the MS receives a notification message for the current group or broadcast call with the related channel position and if the channel is found, the MS shall change to it and stay in group receive mode.
4. If the MS receives a notification message for the current group or broadcast call without information on the related channel position, the MS shall leave group receive mode, go to idle mode and in order to establish a dedicated connection with the network to become informed on the related channel position.
5. If a CHANNEL RELEASE is send to a mobile station which is in dedicated mode and which is involved in a voice group call or voice broadcast call, a group channel description may be included, describing the voice group call channel or voice broadcast channel to which the mobile station shall go after the channel release procedure.
Reference(s)
3GPP TS 03.22 subclause 5.2.3.
3GPP TS 04.08 / 3GPP TS 44.018 subclause 9.1.7.1.
26.14.9.2.2 Test purpose
In group receive mode it is verified that:
1. after a cell change to a different LA, the MS leaves group receive mode, enters idle mode and establishes a dedicated connection with the network to perform location updating;
2. after location updating, if NCH is present on the new cell but there is no NOTIFICATION / NCH for the current group or broadcast call the MS stays in idle mode;
3. after location updating, if the MS receives NOTIFICATION / NCH for the current group or broadcast call with the related channel position the MS changes to the group channel and stays in group receive mode;
4. after location updating, if the MS receives NOTIFICATION / NCH for the current group or broadcast call without information on the related channel position, the MS establishes a dedicated connection with the network to get the related channel position and then enters to group receive mode;
5 it is also tested, when a mobile, in dedicated mode and involved in a voice group or broadcast call, receives CHANNEL RELEASE including a group channel description channel the mobile station goes onto the channel after the channel release procedure.
26.14.9.2.3 Method of test
Initial Conditions
System Simulator:
2 cells with different LA within a same PLMN: cell A and cell B, with default parameters.
Mobile Station:
The MS is in MM-state "idle, updated" with a TMSI allocated on cell A. No automatic answering is configured.
Specific PICS statements:
–
PIXIT Statements:
– Way to configure VGCS or VBS.
– Way to verify the downlink speech path.
Foreseen Final State of the MS
"Idle, updated".
Test Procedure
The following test procedure is repeated for k = 1, 2, 3.
The MS is brought into group receive mode on cell A. Start cell B with NCH but NOTIFICATON/NCH containing irrelevant group call references (k=1), or with NOTIFICATON/NCH containing the relevant group call reference but no VGCS/VBS channel description (k=2), or with NOTIFICATON/NCH containing the relevant group call reference and VGCS/VBS channel description (k=3). Lower the transmission levels of cell A so that C1 of cell A becomes less than zero. The MS re-selects to the cell B. It is checked that the MS does location update on cell B. If it is succeeded the MS either remains in the idle mode (for k=1), or enters to group receive mode on cell B (for k=2, 3) without manual intervention.
Increase the power level of cell A to the default value and decrease the power level of cell B so that the MS re-selects the cell A. The MS attempts a location updating. The SS rejects it with cause #17 (network failure) to force the MS re-initiate location updating. The SS checks that the TCH in downlink is not connected before a location updated. The MS initiates again a new attempt for location updating, the SS accepts it, then the MS initiates a new group call and enters the group transmit mode, SS sends an UPLINK RELEASE message to bring MS to group receive mode. Then SS assigns a new group channel for it in the CHANNEL RELEASE message. It is checked that the MS enters group receive mode and the new TCH assigned in downlink is through connected.
Maximum Duration of Test
10 minutes.
Expected Sequence
Repeat the test sequence for test counter k= 1, 2, 3.
Step |
Direction |
Message |
Comments |
---|---|---|---|
0 |
MS |
the MS is brought into group receive mode on cell A. |
|
A1 |
SS -> MS |
NOTIFICATION/NCH |
k=1, sent on cell B, containing an irrelevant group call reference. |
B1 |
SS -> MS |
NOTIFICATION/NCH |
k=2, sent on cell B, containing the relevant group call reference but without VGCS/VBS channel description. |
C1 |
SS -> MS |
NOTIFICATION/NCH |
k=3, sent on cell B, with the relevant group call reference and the VGCS/VBS channel description. |
2 |
SS |
The RF level of cell A is lowered until the MS re-selects cell B. |
|
The following messages are sent and received on cell B. |
|||
3 |
MS -> SS |
CHANNEL REQUEST |
location updating |
4 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
5 |
MS -> SS |
LOCATION UPDATING REQUEST |
"location updating type" = normal, "CKSN" = CKSN1, "location area identification" = a, "mobile station classmark 1" as given by the PICS and "mobile identity" = TMSI1, L2: SABM / UA. |
6 |
SS -> MS |
LOCATION UPDATING ACCEPT |
MI omitted, follow-on proceed IE included |
A7 |
MS -> SS |
CHANNEL RELEASE |
k=1, the MS in idle mode on cell B, wait 5s. |
A8 |
SS -> MS |
PAGING REQUEST TYPE 1 |
"Mobile Identity" IE contains the TMSI allocated to the MS. |
A9 |
MS -> SS |
CHANNEL REQUEST |
"Establishment Cause" = Answer to paging. |
A10 |
SS -> MS |
IMMEDIATE ASSIGNMENT REJECT |
the first "request reference" corresponds to the CHANNEL REQUEST sent by the MS. |
k=2, |
|||
B7 |
MS -> SS |
NOTIFICATION REPONSE |
Respond to notification. |
B8 |
SS -> MS |
CHANNEL RELEASE |
I format, change from the dedicated channel onto VGCS channel. |
B9 |
MS |
Check that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. |
|
B10 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle mode. |
C7 |
MS -> SS |
CHANNEL RELEASE |
k=3, MS in group receive mode on cell B |
C8 |
MS |
Check that the TCH in downlink is through connected and there is no uplink transmission on that channel for 10 s. |
|
C10 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle mode. |
11 |
SS |
The RF level of cell A is increased to 63 dBV emf(), the RF level of cell B is lowered until the MS re-select cell A. The following messages are sent and received on cell A |
|
12 |
MS -> SS |
CHANNEL REQUEST |
location updating. |
13 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
14 |
MS -> SS |
LOCATION UPDATING REQUEST |
"location updating type" = normal, "CKSN" = CKSN1, "location area identification" = b, "mobile station classmark 1" as given by the PICS and "mobile identity" = TMSI1, L2: SABM / UA. |
15 |
SS -> MS |
LOCATION UPDATING REJECT |
cause #17 |
16 |
SS -> MS |
CHANNEL RELEASE |
|
17 |
SS |
Check that the TCH used in the test step 0 is not through connected for 10 s. |
|
18 |
MS -> SS |
CHANNEL REQUEST |
"Establishment cause": Location updating. This message is sent by the MS 15s after step 16 (no check for that). |
19 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
20 |
MS -> SS |
LOCATION UPDATING REQUEST |
"location updating type" = normal, "CKSN" = CKSN1, "location area identification" = b, "mobile station classmark 1" as given by the PICS and "mobile identity" = TMSI1, L2: SABM / UA. |
21 |
SS -> MS |
LOCATION UPDATING ACCEPT |
both MI and follow-on proceed IE omitted |
22 |
MS |
MMI action, a VGCS call is initiated on cell A |
|
23 |
MS -> SS |
CHANNEL REQUEST |
|
24 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
25 |
MS -> SS |
CM SERVICE REQUEST |
L2: SABM / UA |
26 |
SS -> MS |
CM SERVICE ACCEPT |
|
27 |
MS -> SS |
SETUP |
|
28 |
SS -> MS |
AUTHENTICATION REQUEST |
|
29 |
MS -> SS |
AUTHENTICATION RESPONSE |
|
30 |
SS -> MS |
CHANNEL MODE MODIFY |
|
31 |
MS -> SS |
CHANNEL MODE MODIFY ACKNOWLEDGE |
|
32 |
SS -> MS |
CONNECT |
The MS is in transmit mode and is involved in a voice group call or in a broadcast call |
33 |
MS |
Check the MS is involved in group call |
|
34 |
SS -> MS |
CHANNEL RELEASE |
Including a new group channel description different from the one in step 0. The MS releases L2 multiple frame link (L2:DISC/UA) and enters group receive mode. |
35 |
MS |
Check that the TCH assigned in step 22 is in downlink through connected and there is no uplink transmission on that channel for 10 s. |
|
36 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle state. |
Specific message contents:
CHANNEL RELEASE
Information Element |
value/remark |
Group channel description |
|
– IEI |
74 |
– Length |
|
– Channel type and TDMA offset |
TCH/F |
– Timeslot number |
arbitrarily chosen, but not 0 |
– TSC |
arbitrarily chosen |
– Hopping |
Single RF, non hopping channel |
– ARFCN |
GSM 450: 279 GSM 480: 326 GSM 900: 70 DCS 1 800: 850 PCS 1 900: 750 |
GSM710: 475 GSM 750: 475 T-GSM 810: 475 GSM 850: 197 |
|
Group cipher key number |
Not included |
26.14.9.3 VGCS-VBS / Cell Change / Different PLMN
26.14.9.3.1 Conformance requirement
1. After a cell change to a different LA, if the selected cell belongs to an another PLMN the MS shall leave group receive mode and go to idle mode.
Reference(s)
3GPP 03.22 subclause 5.2.3.
26.14.9.3.2 Test purpose
In group receive mode it is verified that after a cell change to a different LA of an another PLMN, the MS leaves group receive mode, enters idle mode.
26.14.9.3.3 Method of test
Initial Conditions
System Simulator:
2 cells with different LA belonging to the different PLMN: cell A /PLMN1 and cell B / PLMN2, with default parameters.
Mobile Station:
The MS is in MM-state "idle, updated" with a TMSI allocated on cell A. No automatic answering is configured.
Specific PICS statements:
–
PIXIT Statements:
– Way to configure VGCS or VBS.
– Way to verify the downlink speech path.
Foreseen Final State of the MS
"Idle, updated".
Test Procedure
The following test procedure is repeated for k=1, 2.
The MS is brought into group receive mode on cell A. Start cell B with NOTIFICATON/NCH containing an another group call references (k=1), or with NOTIFICATON/NCH containing the same group call reference (k=2). Lower the transmission levels of cell A so that C1 of cell A becomes less than zero. The MS re-selects the cell B and enters idle mode. It is checked that the MS does location update on cell B. If it is succeeded the MS indicates a group/broadcast call with the reference and joins the VGCS/VBS call on MMI request.
Increase the power level of cell A to the default value and decrease the power level of cell B so that the MS re-selects the cell A. The MS does a new location updating and indicates a group/broadcast call.
Maximum Duration of Test
5 minutes.
Expected Sequence
Repeat the test sequence for test counter k= 1, 2.
Step |
Direction |
Message |
Comments |
0 |
MS |
the MS is brought into group receive mode on cell A. |
|
A1 |
SS -> MS |
NOTIFICATION/NCH |
k=1, sent on cell B, with an another group call reference but with the same VGCS/VBS channel description as in test step 0. |
B1 |
SS -> MS |
NOTIFICATION/NCH |
k=2, sent on cell B, with the same group call reference and an another VGCS/VBS channel description as in step 0. |
2 |
SS |
The RF level of cell A is lowered until the MS re-selects cell B. |
|
The following messages are sent and received on cell B. |
|||
3 |
MS -> SS |
CHANNEL REQUEST |
location updating |
4 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
5 |
MS -> SS |
LOCATION UPDATING REQUEST |
"location updating type" = normal, "CKSN" = CKSN1, "location area identification" = a, "mobile station classmark 1" as given by the PICS and "mobile identity" = TMSI1, L2: SABM / UA. |
6 |
SS -> MS |
LOCATION UPDATING ACCEPT |
New TMSI2 |
7 |
MS -> SS |
TMSI REALLOCATION COMPLETE |
|
8 |
SS -> MS |
CHANNEL RELEASE |
I format , MS returns to idle mode |
9 |
MS |
check that the MS gives an indication containing the notified group call reference |
|
10 |
MS |
MMI action to join the VGCS/VBS call |
|
11 |
MS |
check that the downlink voice is received and there is no uplink transmission on that channel for 5 s. |
|
12 |
SS -> MS |
CHANNEL RELEASE |
UI format, the MS returns to idle state. |
13 |
SS |
The RF level of cell A is increased to 63 dBV emf(), the RF level of cell B is lowered until the MS re-select cell A. The following messages are sent and received on cell A. |
|
14 |
MS -> SS |
CHANNEL REQUEST |
location updating |
15 |
SS -> MS |
IMMEDIATE ASSIGNMENT |
|
16 |
MS -> SS |
LOCATION UPDATING REQUEST |
"location updating type" = normal, "CKSN" = CKSN2, "location area identification" = b, "mobile station classmark 1" as given by the PICS and "mobile identity" = TMSI2, L2: SABM / UA. |
17 |
SS -> MS |
LOCATION UPDATING ACCEPT |
TMSI1 |
18 |
MS -> SS |
TMSI REALLOCATION COMPLETE |
|
19 |
SS -> MS |
CHANNEL RELEASE |
I format |
20 |
MS |
check that the MS gives an indication containing the notified group call reference |
|
21 |
SS->MS |
CHANNEL RELEASE |
UI format. |
22 |
SS |
The RF level of cell B is increased to 53 dBV emf(). |