GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

17 Operation and maintenance procedures
17.1 General
Page 375
GSM 09.02 Version 5.3.0: August 1996
The Operation and Maintenance procedures are needed for operating and maintaining the GSM PLMN
network.
The following procedures exist for operation and maintenance purposes:
i) Tracing procedures;
ii) Subscriber Data Management procedures;
iii) Subscriber Identity procedures.
The following application contexts refer to complex MAP Users consisting of several processes:
- subscriberDataManagementContext;
- tracingContext.
These two application contexts need a co-ordinating process in the VLR as described in the following
subclauses.
17.1.1 Tracing Co-ordinator for the VLR
The MAP_OPEN indication opens the dialogue for the stand-alone tracing procedure when the application
context tracingContext is received. If that service is successful, the Co-ordinator can receive the firs
service primitive from the MAP_PM. Depending on the received primitive, the user process is created as
follows:
- if the MAP_ACTIVATE_TRACE_MODE indication is received, the process ATM_VLR_Standalone is
created;
- if the MAP_DEACTIVATE_TRACE_MODE indication is received, the process
DTM_VLR_Standalone is created.
After creation of the user process the Co-ordinator relays the messages between the MAP_PM and the
invoked process until a request or an indication for dialogue termination is received.
The Tracing Co-ordinator is shown in the figure 17.1/1.