14.1.5m Generic test procedure for radio bearers on MTCH in MBSFN Mode
34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification
Initial conditions
System Simulator:
– MBSFN carrier: 1 cell, Cell 31 (PLMN1). In addition to broadcasting System Information, MCCH messages are transmitted by the SS on Cell 31 using MBMS configuration C1 and Default1 MCCH scheduling (No ongoing session) according to subclause 11.2 of TS 34.108.
– Unicast carrier: 1 cell, Cell 1 with default parameters.
User Equipment:
– On the unicast carrier cell the UE is in registered Idle Mode on PS (state 3) if the UE only supports PS domain or registered Idle Mode on CS/PS (state 7) if the UE supports both CS and PS domains, as specified in clause 7.2.2 of TS 34.108.
– The UE is in MBSFN Idle mode with one activated service as specified in clause 7.6.4 of TS 34.108. The UE has selected (i.e. it is included in MBMS_ACTIVATED_SERVICES variable) a national service for which a session will start on MBSFN Cell 31 (see TS 34.108 clause 11.2.4) during the test.
Test procedure
a) The UE is camping on Cell 1 and Cell 31. In addition to broadcasting System Information, MCCH messages are transmitted by the SS on Cell 31 using MBMS configuration C1 (no session ongoing) and Default1 MCCH scheduling according to clause 11.2 of TS 34.108.
b) The SS sends ACTIVATE RB TEST MODE on the unicast carrier and the UE responds with ACTIVATE RB TEST MODE COMPLETE.
c) The SS sends CLOSE UE TEST LOOP to activate RLC SDU counting on Cell 31 MTCH (Transmission identity indicating the MBMS activated service).
d) The SS notifies on MCCH about the start of an MBMS session for one modification period. MCCH messages are transmitted by the SS on Cell 31 using MBMS configuration C4 (one PTM session starting) and Default1 MCCH scheduling according to clause 11.2 of TS 34.108.
e) From the first SFN of the next modification period the SS transmits MCCH messages on Cell 31 using MBMS configuration C2 (one PTM session ongoing) and Default1 MCCH scheduling according to clause 11.2 of TS 34.108; and the SS broadcasts 10 RLC SDUs on the MTCH configured on the MBMS p-t-m radio bearer for the activated service.
f) The UE establishes the p-t-m radio bearer for the activated service according to the specified service activation time (i.e. the first SFN of the modification period following the notification (step d). The UE closes the test loop and starts counting successfully received RLC PDUs on the MTCH. The UE will send CLOSE UE TEST LOOP COMPLETE.
g) The SS broadcast 10 RLC SDUs on the MTCH configured on the concerned MBMS radio bearer. The MBMS data is broadcasted using RLC SDU size and transport format as specified for sub-test 1.
h) The SS retrieves the number of RLC SDUs on MTCH counted by the UE by sending the UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST message. The SS checks that the UE has received at least one RLC SDU and records the reported value.
i) Repeat steps f) and g) for the remaining sub-tests.
j) The SS broadcast 10 RLC SDUs on the MTCH configured on the concerned MBMS radio bearer. The MBMS data is broadcasted using RLC SDU size and transport format as specified for the sub-test under test.
k) The SS retrieves the number of RLC SDUs on MTCH counted by the UE by sending the UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST message. The SS checks that the UE has received at least one RLC SDU of the MBMS data sent in step f). The SS records the reported value. See note 1.
l) The Test Loop is opened and RB Test Mode is deactivated.
NOTE 1: For UE in UE test loop mode 3 then the RLC SDU counter value is only reset upon reception of CLOSE UE TEST LOOP message configuring UE test loop mode 3. To enable the SS to measure the number of received RLC SDUs for the different sub-tests then the SS needs to record the reported values for each sub-test and make the checking of the reported value relative to the previously reported value.
Expected sequence
|
Step |
Direction |
Carrier |
Message |
Comment |
|
|
UE |
SS |
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|
1 |
|
U |
ACTIVATE RB TEST MODE |
||
|
2 |
|
U |
ACTIVATE RB TEST MODE COMPLETE |
||
|
3 |
|
U |
CLOSE UE TEST LOOP |
Loop back mode 3 is activated on Cell 31 for the selected national service on MTCH. |
|
|
4 |
|
M |
MBMS MCCH Message Configuration C4 |
Includes the national service activated at UE in the modified services list for one modification period. Activation time is the start of the next modification period. |
|
|
5 |
|
M |
MBMS MCCH Message Configuration C2 |
No modified services. One ongoing service corresponding to that activated at the UE a PS RAB |
|
|
6 |
|
U |
CLOSE UE TEST LOOP COMPLETE |
The UE shall establish the indicated p-t-m radio bearer and close the test loop. |
|
|
7 |
SS |
The SS transmits 10 RLC SDUs on the MTCH. The MBMS data is broadcasted using RLC SDU size and transport format as specified for sub-test 1. |
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|
8 |
|
M |
UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST |
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|
9 |
|
M |
UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE |
The SS checks that the number of reported RLC PDUs is greater than zero and records the value. |
|
|
10 |
SS |
The SS repeats steps 10 to 12 for the remaining sub-tests (sub-test 2 etc.). |
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|
11 |
SS |
The SS transmits 10 RLC SDUs on the MTCH. The MBMS data is broadcasted using RLC SDU size and transport format as specified for the current sub-test under test. |
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|
12 |
|
M |
UE TEST LOOP MODE 3 RLC SDU COUNTER REQUEST |
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|
13 |
|
M |
UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE |
The SS checks that the number of reported RLC PDUs is greater than the recorded value from the previous sub-test. The SS records the reported value. |
|
|
14 |
|
U |
OPEN UE TEST LOOP |
||
|
15 |
|
U |
OPEN UE TEST LOOP COMPLETE |
||
|
16 |
|
U |
DEACTIVATE RB TEST MODE |
||
|
17 |
|
U |
DEACTIVATE RB TEST MODE COMPLETE |
||
Specific Message Contents
UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE (Step 9)
|
Information Element |
Value/remark |
|
RLC SDU Counter Value |
Check that the number is greater than zero |
UE TEST LOOP MODE 3 RLC SDU COUNTER RESPONSE (Step 13)
|
Information Element |
Value/remark |
|
RLC SDU Counter Value |
Check that the number is greater than the value reported at the previous sub-test. |