2 Classification of interworking cases


2.1 Transparent procedures

The following MSC procedures require transparent mapping of BSSAP information elements into MAP parameters and vice versa (see GSM 09.02 for definitions and the use of the procedures):

– update location area;

– detach IMSI;

– forward new TMSI;

– provide IMSI;

– obtain IMEI;

– check IMEI;

– authenticate;

– trace subscriber activity.

2.2 Non-transparent procedures

Procedures in this class require processing in the MSC and information element mapping. These procedures include those related to:

– outgoing call set-up;

– incoming call set-up;

– handover;

– cipher mode setting.