Overload prevention in a telecommunications network node

H - Electricity – 04 – Q

Patent

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Details

H04Q 3/66 (2006.01) H04L 29/04 (2006.01)

Patent

CA 2203538

The invention relates to a method of preventing an overload in a telecommunications network node. The network comprises at least one service node (CN; SCP) and at least one other node (PN; SSP) from which the service node receives service requests. According to the method, the service node transmits restriction requests (CG) to a node connected thereto, so that said node would restrict the number of service requests it transmits towards the service node. The restriction request comprises information on how the node should perform the restriction. A restriction request is transmitted at least whenever said information changes. In order to provide a simple and reliable method, the service node transmits a restriction request to a predetermined proportion of the total number of the service request messages fulfilling the criteria given, whereupon each individual service request message has a predetermined probability of triggering the transmission of a restriction request, the probabilities being selected in such a way that the total number of the restriction requests is smaller than the total number of the service requests.

La présente invention concerne un procédé de prévention de la surcharge au niveau d'un noeud de réseau de télécommunications. Le réseau comporte au moins un noeud de service (CN, SCP) et au moins un autre noeud (PN, SSP) en provenance duquel le noeud de service reçoit les demandes de service. Selon le procédé de la présente invention, le noeud de service émet des demandes de restriction (CG) à un noeud qui lui est raccordé, demandant à ce noeud de restreindre la quantité de demandes service qu'il émet à destination du noeud de service. La demande de restriction comprend des informations concernant la façon dont le noeud doit pratiquer la restriction. L'émission de la demande de restriction se fait au moins à chaque évolution de l'information. Pour simplifier et fiabiliser le procédé, le noeud de service émet une demande de restriction spécifiant une proportion prédéterminée d'un nombre total de messages de demandes de service satisfaisant les critères définis. Chaque message de demande de service est ainsi caractérisé par une probabilité prédéterminée de déclenchement d'émission de demande de restriction, ces probabilités étant calculées de façon que le nombre total de demandes de restrictions soit inférieur au nombre total de demandes de service.

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