09.163GPPGeneral Packet Radio Service (GPRS)Gs interface network service specificationServing GPRS Support Node (SGSN) - Visitors Location Register (VLR)TS

This Technical Specification (TS) has been produced by the Special Mobile Group (SMG).

The present document provides a mechanism giving reliable transfer of signalling messages between the Serving GPRS Support Node (SGSN) and the data base of a Visitors Location Register (VLR) for co-ordination between GSM circuit switched services and GSM packet data services within the digital cellular telecommunications system (Phase 2+).

The contents of the present document are subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the contents of the present document it will then be re-released with an identifying change of release date and an increase in version number as follows:

Version 7.x.y


7 indicates Release 1998 of GSM Phase 2+

x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.

y the third digit is incremented when editorial only changes have been incorporated in the specification.