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GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

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Page 280<br />

<strong>GSM</strong> <strong>09.02</strong> <strong>Version</strong> <strong>5.3.0</strong>: August 1996<br />

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Figure 15.2/1: Interfaces applicable to the MAP-User<br />

15.2.3 Convention on primitives parameters<br />

15.2.3.1 Open service<br />

When the originating and destination reference parameters shall be included in the MAP-OPEN request<br />

primitive, their value are indicated as a comment to the signal which represents this primitive.<br />

15.2.3.2 Close service<br />

When a pre-arranged released is requested, a comment is attached to the signal which represents the<br />

MAP-CLOSE request primitive. In the absence of comment, a normal release is assumed.<br />

15.2.4 <strong>Version</strong> handling at dialogue establishment<br />

Unless explicitly indicated in subsequent subclauses, the following principles regarding version handling<br />

procedures at dialogue establishment are applied by the MAP-user:<br />

15.2.4.1 Behaviour at the initiating side<br />

When a MAP user signalling procedure has to be executed, the MAP-user issues a MAP-OPEN request<br />

primitive with an appropriate application-context-name. If several names are supported (i.e. several<br />

versions) a suitable one is selected using the procedures described in clause 3.<br />

If a MAP-CLOSE Confirm primitive to a MAP-OPEN request with a result parameter set to "refused" and a<br />

diagnostic parameter indicating "application-context-not-supported" or "potential incompatibility problem",<br />

the MAP-User issues a new MAP-OPEN request primitive with the equivalent version one context. This is<br />

informally represented in the SDL diagrams by a task symbol indicating "Perform V1 procedure".<br />

15.2.4.2 Behaviour at the responding side<br />

On receipt of a MAP-OPEN indication primitive, the MAP-User analyses the application-context-name.<br />

If it refers to a version one context, the associated V1 procedure is executed, otherwise the associated V2<br />

procedure is executed.

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