BSSAP+ – Base Station Subsystem Application Part +
BSSAP+ is used to support signalling between the VLR (Visitor Location Register) and SGSN (Serving GPRS Support Node) on the Gs interface. Typical procedures used by the VLR include sending the BSSAP+ paging request message to a mobile via the GPRS service (this procedure applies to mobiles that are attached for GPRS services and non GPRS services and can be performed simultaneously with any other procedure at the Gs interface). Other procedures include the location update procedure.
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