12.8 GMM READY timer handling
34.123-13GPPPart 1: Protocol conformance specificationRelease 15TSUser Equipment (UE) conformance specification
12.8.1 Definition
12.8.2 Conformance requirement
If a READY timer value is received by an UE capable of both UMTS and GSM in the ATTACH ACCEPT or the ROUTING AREA UPDATE ACCEPT messages, then the received value shall be stored by the UE in order to be used at an intersystem change from UMTS to GSM.
Reference
3GPP TS 24.008 clause 4.7.2.1
12.8.3 Test purpose
To verify that READY timer value received in UTRA can be used in GSM.
12.8.4 Method of test
12.8.4.1 Test procedure
Initial condition
System Simulator:
Two cells (not simultaneously activated), cell A (UTRAN) in MCC1/MNC1/LAC1/RAC1 (RAI-1), cell B (GSM) in MCC1/MNC1/LAC1/RAC2 (RAI-4).
|
Parameter |
Unit |
Cell B (GSM) |
|
Qsearch_I (TDD) |
dBm |
15 (never) |
Cell B is in neighbour cell list of cell A.
Both cells are operating in network operation mode II.
The SIB1 IE "CN domain specific NAS system information", for the CS Domain, is set to value "00 00" (T3212 value is set to 0 and ATT flag is set to FALSE) in cell A (UTRAN).
The value of ATT flag in SIB3 IE “Control Channel Description” is set to value “0” in cell B (GSM).
In SIB3 and SIB4 the IE “SsearchRAT”, is set to value “20dB” in cell A (UTRAN).
User Equipment:
The UE has a valid IMSI.
The UE has been registered in the CS domain.
Related ICS/IXIT statements
UE supports both GSM/GPRS and UTRAN Radio Access Technologies Yes/No
UE operation mode A Yes/No
Switch off on button Yes/No
Automatic PS attach procedure at switch on or power on Yes/No
Test procedure
An attach is performed.
T3314; set to 60 seconds
Expected Sequence
|
Step |
Direction |
Message |
Comments |
|
|
UE |
SS |
|||
|
The following messages are sent and shall be received on cell A. |
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|
1 |
SS |
Set the cell type of cell A to the "Serving cell". Cell B is switched off. (see note) |
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|
2 |
UE |
The UE is set in UE operation mode A (see ICS). If UE operation mode A not supported set the UE in operation mode C. The UE is powered up or switched on and initiates an attach (see ICS). |
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|
2a |
SS |
SS checks that the IE "Establishment cause" in the received RRC CONNECTION REQUEST message is set to "Registration". |
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|
3 |
-> |
ATTACH REQUEST |
Attach type = ‘GPRS attach’ Mobile identity = IMSI |
|
|
3a |
<- |
AUTHENTICATION AND CIPHERING REQUEST |
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|
3b |
-> |
AUTHENTICATION AND CIPHERING RESPONSE |
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|
3c |
SS |
The SS starts integrity protection. |
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|
4 |
<- |
ATTACH ACCEPT |
Attach result = ‘GPRS only attached’ Allocated P-TMSI = P-TMSI-2 P-TMSI Signature = P-TMSI-2 signature Routing area identity = RAI-1 T3314 = 60 seconds T3312=6 minutes |
|
|
5 |
-> |
ATTACH COMPLETE |
||
|
5a |
SS |
The SS releases the RRC connection. |
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|
6 |
SS |
Set the cell type of cell A to the "Suitable neighbour cell". Set the cell type of cell B to the "Serving cell". |
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|
7 |
UE |
UE establish cell reselection to GSM system |
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|
The following messages are received on Cell B (GERAN) |
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|
8a |
UE |
Registration on CS |
Optional step. See TS 34.108 Location Update Procedure may be initiated from the UE. |
|
|
8 |
-> |
ROUTING AREA UPDATE REQUEST |
Update type = ‘RA updating’ Old P-TMSI signature=P-TMSI-2 signature Old Routing area identity = RAI-1 |
|
|
9 |
<- |
ROUTING AREA UPDATE ACCEPT |
Update result = ‘RA updated’ Allocated P-TMSI = P-TMSI-1 P-TMSI Signature = P-TMSI-1 signature Routing area identity = RAI-4 |
|
|
10 |
-> |
ROUTING AREA UPDATE COMPLETE |
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|
11 |
SS |
The SS verifies that the time between the end of Step 10 and the periodic RA updating is Ready Timer Period (T3314) + Periodic Routing Area Updating timer (T3312) (+/- 10%) |
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|
12 |
-> |
ROUTING AREA UPDATE REQUEST |
Update type = ‘Periodic updating’ Old P-TMSI signature=P-TMSI-1 signature |
|
|
13 |
<- |
ROUTING AREA UPDATE ACCEPT |
Update type = ‘RA updated’ |
|
|
14 |
UE |
UE is switched off or power is removed (see ICS) |
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|
15 |
-> |
DETACH REQUEST |
Message not sent if power is removed. Detach type = ‘power switched off, GPRS detach’ |
|
|
NOTE: The definitions for "Non-Suitable cell" and "Serving cell" are specified in TS34.108 clause 6.1 in the relevant to the RAT of the cells "Reference Radio Conditions" subclauses. |
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Specific message contents
None.
12.8.5 Test requirements
At step4, when the UE receives the ATTACH ACCEPT or the ROUTING AREA UPDATE ACCEPT messages, UE shall:
– store the received READY timer value.
At step12, UE shall establish periodic Routing Area Update after Timer Period (T3314) + Periodic Routing Area
Updating timer (T3312) (+/- 10%).