This TS describes the subset of Base Station System Application Part (BSSAP) messages and procedures, defined in TS 48.006
and TS 48.008
, which is used on the E interface. A general description can be found in TS 23.002
and TS 23.009
For the initiation and execution of handover between MSCs a subset of BSSMAP procedures are used. For the subsequent control of resources allocated to the Mobile Station (MS) BSSMAP procedures are used. DTAP is used for the transfer of connection management and mobility management messages between the MS and the controlling MSC.