Communications system having enhanced fault tolerance

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04Q 11/04 (2006.01) H04Q 7/22 (2006.01)

Patent

CA 2396287

The invention relates to communications systems, and particularly to enhancing tolerance to failures in network elements and transmission systems. The fault tolerance is achieved by 1) providing two or more active ATM permanent virtual channel (PVC) connections (31a-31d) between a core network element (3G-SGSN) and an access network element (RNC), and 2) providing a separate ATM interface unit (IU1-IU4) for each such ATM PVC connection in the core network element (3G-SGSN). The user and signalling traffic is distributed among these active connections and interface units. In case of a failure in one of the ATM PVC connections or interface units (IU1-IU4), the communication is maintained over the other connections) and interface unit(s). Thus, only part of the transport capacity is lost, and a total block of communication is avoided. Any new communication will be setup over the other connections.

Cette invention se rapporte à des systèmes de communication et, plus particulièrement, à l'amélioration de la tolérance aux pannes dans des éléments de réseau et des systèmes de transmission. On obtient la tolérance aux pannes: (1) en prévoyant au moins deux connexions de canal virtuel permanent (PVC) ATM actif (31a-31d) entre un élément de réseau de noyau (3G-SGSN) et un élément de réseau d'accès (RNC), et (2) en prévoyant une unité d'interface ATM séparée (IU1-IU4) pour chacune de ces connexions PVC ATM dans l'élément de réseau de noyau (3G-SGSN). Le trafic d'utilisateur et de signalisation est distribué parmi ces connexions actives et ces unités d'interface. En cas de panne dans l'une des connexions PVC ATM ou dans l'une de ces unités d'interface (IU1-IU4), la communication est maintenue sur la ou les autres connexions et sur la ou les autres unités d'interface. Ainsi, une partie seulement de la capacité de transport est perdue et un blocage total des communications est évité. Toute nouvelle communication va être établie sur les autres connexions.

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