Reduction of signalling load in packet radio network

Details Reduction of signalling load in packet radio network Reduction of signalling load in packet radio network

H - Electricity

04

W

H04W 64/00 (2009.01) H04W 48/00 (2009.01)

Patent

CA 2285953

A support node (SGSN) in a packet radio network, the node being adapted to support mobile station location updates and data transmission to and/or from a mobile subscriber. A first address (IP1) has been appointed for the support node and it corresponds to the area served by the support node in the packet radio network. In addition, a second address (IP2) has been appointed to the support node (SGSN) and it belongs to the same address system as said first address (IP1). The second address (IP2) is used substantially for data transmission and the first address (IP1) is used substantially for signalling outside data transmission. The area served by the support node is preferably divided into subareas, to each of which a second address (IP2) is appointed, and a mobile subscriber location update is informed to the home location register (HLR) only when the support node (SGSN) serving the mobile subscriber changes, but not when the subarea changes. The support node is preferably modular in such a way that there are a plurality of data transmission blocks (53), each of them serving a dedicated subarea and using its dedicated second address (IP2, IP2', IP2").

L'invention concerne un noeud de prise en charge (SGSN) dans un réseau de radiocommunication par paquets, ce noeud étant conçu pour accepter les mises à jour de positions de stations mobiles et les transmissions de données à destination et/ou en provenance d'un abonné mobile. Une première adresse (IP1), attribuée au noeud de prise en charge, correspond à la zone desservie par ce noeud de prise en charge dans le réseau de radiocommunication par paquets. En outre, une seconde adresse (IP2), attribuée au noeud de prise en charge (SGSN), appartient au même système d'adresses que ladite première adresse (IP1). On utilise la seconde adresse (IP2) sensiblement pour des transmissions de données et la première adresse (IP1) pour signaler des transmissions de données extérieures. La zone desservie par le noeud de prise en charge est de préférence divisée en sous-zones, chacune desquelles se voit attribuer une seconde adresse (IP2). Une mise à jour de la position d'un abonné mobile est transmise à l'enregistreur de positions de rattachement (HLR) uniquement lorsque le noeud de prise en charge (SGSN) desservant l'abonné mobile change, mais non en cas de changement de sous-zone. Le noeud de prise en charge est de préférence modulaire de manière qu'il y ait plusieurs blocs (53) de transmission de données, chacun d'eux desservant une sous-zone exclusive et utilisant sa seconde adresse exclusive (IP2, IP2', IP2'').

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