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TS 09.18 (CT1)
General Packet Radio Service (GPRS) – Serving GPRS Support Node (SGSN) - Visitors Location Register (VLR); Gs interface layer 3 specification

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(P) GSM Rel-98 v7.5.0    2001/12    53 p.
(P) GSM Rel-97 v6.7.0    2001/12    53 p.

Rapporteur:  DAWES, Peter
Descendant:  TS 29.018    

This TS specifies or references procedures used on the Serving GPRS Support Node (SGSN) to Visitors Location Register (VLR) interface for interoperability between GSM circuit switched services and GSM packet data services.

This TS specifies the layer 3 messages and procedures on the Gs interface to allow coordination between databases and to relay certain messages related to GSM circuit switched services over the GPRS subsystem.

The functional split between VLR and SGSN is defined in TS 03.60. The required procedures between VLR and SGSN are defined in detail in this TS.


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1   Scope   PDF-p. 8
2   References
3   Definitions, symbols and abbreviations   PDF-p. 11
4   Description of the association between a VLR and an SGSN
5   Paging for non-GPRS services procedure   PDF-p. 13
6   Location Update for non-GPRS services procedure   PDF-p. 15
7   Non-GPRS alert procedure   PDF-p. 19
8   Explicit IMSI detach from GPRS services procedure

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