27.20 SIM presence detection

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

27.20.1 Definition

The presence of the SIM is an essential requirement for setting up and maintaining a call. The ME detects the presence of the SIM electronically.

27.20.2 Conformance requirement

To ensure that the SIM has not been removed during a card session, the ME shall send STATUS commands within all 30 second periods of inactivity on the SIM‑ME interface during a call. Inactivity in this case is defined as starting at the end of the last communication or the last issued STATUS command. If the ME detects that the SIM has been removed, a possibly ongoing call shall be terminated by the ME within 5 s at the latest after having detected the SIM removal.

Reference:

3GPP TS 11.11, subclause 11.2.8 and TS 102.221, subclause 14.5.2.

27.20.3 Test purpose

1. To verify that there are no periods of inactivity on the SIM‑ME interface greater than 30 seconds during a call.

2. To verify that the ME terminates a call within 5 s at the latest after having received a wrong response to the STATUS command.

27.20.4 Method of test

27.20.4.1 Initial conditions

The ME is connected to the SIM-simulator.

All elementary files are coded as default.

27.20.4.2 Procedure

a) A call is set up using the generic call setup.

b) The SIM simulator monitors the periods of inactivity on the SIM-ME interface.

c) After 3 minutes, the call is cleared.

d) A call is set up using the generic call setup.

e) After one minute after the call was successfully set up, the SIM simulator responds to a STATUS command with the response data indicating a DF different from the current DF.

27.20.5 Test requirements

1. During step b), the time periods of inactivity shall not be longer than 30 s.

2. After step e), the ME shall terminate the call within 5 s at the latest after having received the wrong response to the STATUS command.