10.12.2012 Views

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

20.4.2 Procedures in the VLR<br />

20.4.2.1 The Mobile Subscriber is present<br />

Page 593<br />

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

When receiving the MAP_PROCESS_ACCESS_REQUEST indication, MAP_UPDATE_LOCATION_AREA<br />

indication while the mobile station not reachable flag (MNRF) is set, the VLR will send the<br />

MAP_READY_FOR_SM request towards the HLR. The Alert Reason is set to indicate that the mobile<br />

subscriber is present. If the authentication procedure is initiated and it fails, the VLR will not initiate the<br />

service. The process in VLR is described in detail in the subclause 21.10.<br />

20.4.2.2 The Mobile Equipment has memory available<br />

The MAP_PROCESS_ACCESS_REQUEST indication starts the MAP_PROCESS_ACCESS_REQUEST<br />

service in the VLR. The application context in the MAP_OPEN indication refers to the short message<br />

alerting procedure.<br />

If the service MAP_PROCESS_ACCESS_REQUEST is successful, the VLR waits for the next message<br />

from the MSC. When receiving the MAP_READY_FOR_SM indication from the MSC, the VLR will check<br />

the contents. Data errors are reported to the MSC as an unexpected data value or data missing error,<br />

depending on the error. If the primitive passes the data check, the VLR forwards it to the HLR and awaits<br />

an acknowledgment.<br />

When receiving the MAP_READY_FOR_SM confirmation from the HLR and the Alert Reason is MS<br />

memory available, the VLR will act as follows:<br />

- the MAP_READY_FOR_SM response is sent to the MSC as follows:<br />

- an acknowledge in the positive case;<br />

- system failure error, if unexpected data value, data missing, or unknown subscriber errors are<br />

received, otherwise the error cause received from the HLR;<br />

- a facility not supported error, if the HLR supports MAP V1 only;<br />

- procedure failure is reported as a system failure error.<br />

The short message alert procedure in the VLR is shown in figures 20.4/5.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!