GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

Page 158
GSM 09.02 version 5.3.0: August 1996
12.4.2 TC-U-ABORT ind
On receipt of a TC-U-ABORT indication carrying a MAP-user-abort PDU, the MAP PM shall issue a
MAP-U-ABORT indication primitive. The user-reason and diagnostic information elements are mapped to
the corresponding parameters of the MAP-U-ABORT indication primitive.
All state machines associated with the dialogue are returned to idle.
12.5 Provider Abort
The MAP has the ability to abort a dialogue at both the dialogue-initiator side and the dialogue-responder
side.
The provider abort procedure is driven by one of the following events:
- a MAP PM error situation;
- a TC-P-ABORT indication primitive;
- a TC-U-ABORT indication primitive carrying a MAP-abort PDU.
12.5.1 MAP PM error situation
In the case of an abnormal situation detected at the MAP level during an established dialogue, the MAP
PM shall:
- issue a MAP-P-ABORT indication primitive with the appropriate value of the provider-reason
parameter;
- construct a MAP-abort PDU from the value of these parameters and request its transfer using a
TC-U-ABORT request primitive.
12.5.2 TC-P-ABORT ind
On receipt of a TC-P-ABORT indication, the MAP PM shall issue a MAP-P-ABORT indication primitive.
All state machines associated with the dialogue are returned to idle.
12.5.3 TC-U-ABORT ind
On receipt of a TC-U-ABORT indication carrying a MAP-abort PDU, the MAP PM shall issue a
MAP-P-ABORT indication primitive, with the appropriate value of the provider-reason parameter. The
source parameter shall indicate "MAP-provider".
All state machines associated with the dialogue are returned to idle.
12.6 Procedures for MAP specific services
This subclause describes the MAP procedures for MAP specific services.
These procedures are driven by the following types of events:
- a MAP specific request or a MAP specific MAP response primitive;
- a component handling primitive from TC.
A Service State Machine is activated on receipt of one of the following signals:
- a MAP request primitive, which activates a requesting SSM;
- a TC-INVOKE indication primitive without linked identifier, which activates a responding SSM.