27.1 MS identification by short IMSI

3GPP51.010-1Mobile Station (MS) conformance specificationPart 1: Conformance specificationTS

27.1.1 MS identification by short IMSI – Normal case

27.1.1.1 Definition

The IMSI is used for unique identification of the MS by a GSM network. The IMSI is stored in the SIM and read during the SIM/ME initialization procedure.

27.1.1.2 Conformance requirement

On the receipt of an IMMEDIATE ASSIGNMENT message the MS shall send PAGING RESPONSE containing the IMSI of the SIM.

3GPP TS 11.11, subclauses 11.2.1 and 11.4.2, 3GPP TS 04.08 / 3GPP TS 24.008, subclause 10.5.1.4.

27.1.1.3 Test purpose

1) To verify that the ME uses the IMSI of the SIM.

2) To verify that the ME can handle an IMSI of less than the maximum length.

27.1.1.4 Method of test

27.1.1.4.1 Initial conditions

The SS transmits on the BCCH, with the following network parameters:

Attach/detach: disabled.

LAI-MCC: 246

LAI-MNC 81 or 813 (see Note 0)

LAI-LAC: 0001

Access control: unrestricted.

The default SIM is installed into the ME and the MS is powered on.

27.1.1.4.2 Procedure

a) The SS sends PAGING REQUEST to the MS using the IMSI stored in the SIM.

b) After receipt of a CHANNEL REQUEST from the MS, the SS sends IMMEDIATE ASSIGNMENT to the MS.

c) After receipt of a PAGING RESPONSE from the MS, the SS sends CHANNEL RELEASE to the MS.

27.1.1.5 Test requirement

After step b) the MS shall send PAGING RESPONSE to the SS containing the IMSI stored in the SIM.

27.1.1a MS identification by short IMSI – for GPRS

27.1.1a.1 Definition

The IMSI is used for unique identification of the MS by a GSM network. The IMSI is stored in the SIM and read during the SIM/ME initialization procedure.

27.1.1a.2 Conformance requirement

1. During SIM initialization the ME runs the IMSI request procedure.

2. During the IMSI request procedure the ME performs the reading procedure with EFIMSI.

3. Upon reception of a paging indication for GPRS services using IMSI, the MS shall […] locally detach from GPRS. The local detach includes deleting any RAI, P-TMSI, P-TMSI signature and GPRS ciphering key sequence number stored, setting the GPRS update status to GU2 NOT UPDATED and changing state to GMM-DEREGISTERED.

After performing the local detach, the MS shall then perform a GPRS attach or combined GPRS attach procedure.

3GPP TS 11.11 / 3GPP TS 51.011, subclauses 11.2.1 and 11.4.2, 3GPP TS 04.08 / 3GPP TS 24.008, subclause 4.7.9.1.2.

27.1.1a.3 Test purpose

1) To verify that the ME uses the IMSI of the SIM.

2) To verify that the ME can handle an IMSI of less than the maximum length.

27.1.1a.4 Method of test

27.1.1a.4.1 Initial conditions

The SS transmits default message contents of Cell A, subclauses 40.1.1 and 40.2.1.1 on the BCCH, with the following exceptions:

RAI-MCC: 246

RAI-MNC 81 or 813 (see Note 0)

RAI-LAC: 0001

Network Mode of Operation is set to NMO II.

The GPRS SIM is installed into the ME and the MS is powered on. The MS performs a GPRS attach procedure. This will be accepted by the SS.

27.1.1a.4.2 Procedure

a) The SS sends PAGING REQUEST for GPRS services to the MS using the IMSI stored in the SIM.

b) After receipt of a CHANNEL REQUEST from the MS, the SS sends IMMEDIATE ASSIGNMENT to the MS.

c) After receipt of an ATTACH REQUEST from the MS, the SS allows to complete the GPRS attach procedure.

27.1.1a.5 Test requirement

After step b) the MS shall send ATTACH REQUEST to the SS containing the IMSI stored in the SIM.

27.1.2 MS identification by short IMSI, Phase 1 DCS SIM

27.1.2.1 Definition

Different from Phase 2, the IMSI in a Phase 1 DCS SIM is stored in a directory DFDCS1800 with the specific identifier "7F 21". To ensure backwards compatibility, if selection of the phase 2 identifier "7F 20" fails, the MS shall select "7F 21". Otherwise access to the IMSI and other data is impossible with a Phase 1 DCS SIM

-27.1.2.2 Conformance requirement

If selection of DFGSM by the identifier "7F 20" fails, the ME shall select DFDCS1800 with "7F 21".

3GPP TS 11.11, subclause 10.4.

27.1.2.3 Test purpose

To verify that the ME uses the identifier "7F 21" to select DFDCS1800 in a Phase 1 DCS SIM.

27.1.2.4 Method of test

27.1.2.4.1 Initial conditions

The SS transmits on the BCCH, with the following network parameters:

Attach/detach: disabled.

LAI (MCC/MNC/LAC): 246/81/0001.

Access control: unrestricted.

A phase 1 DCS SIM (identifier of DFDCS1800 is "7F 21", DFGSM not existing) with default values is installed into the ME and the MS is powered on.

27.1.2.4.2 Procedure

a) The SS sends PAGING REQUEST to the MS using the IMSI stored in the SIM.

b) After receipt of a CHANNEL REQUEST from the MS, the SS sends IMMEDIATE ASSIGNMENT to the MS.

c) After receipt of a PAGING RESPONSE from the MS, the SS sends CHANNEL RELEASE to the MS.

27.1.2.5 Test requirement

After step b) the MS shall send PAGING RESPONSE to the SS containing the IMSI stored in the SIM.