Redundant switching arrangement

H - Electricity – 04 – M

Patent

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Details

H04M 3/22 (2006.01) H04B 1/74 (2006.01) H04Q 1/24 (2006.01)

Patent

CA 2320740

The invention relates to a redundant switching arrangement using a first and second switching network (SWF_A, SWF_B) or other switching element. The switching elements are used to carry out switching operations in the same way, so that one of the switching elements serves as an active switching element whose switching operations are utilised, while the other switching element serves as a passive switching element backing up the active switching element. To ensure that any faults occurring in the switching elements in such a redundant switching arrangement are detected as quickly as possible, their operation is monitored by comparing the data of the corresponding output channels of the first and second switching elements, and if such a comparison shows that the data contained in any of the corresponding output channels are not identical, an internal test is carried out for at least one of the switching elements to verify the data of the output channel involved. The internal compare test(s) is/are used as a basis for selecting the switching element to continue to serve as the active switching element.

L'invention concerne un système de commutation redondant utilisant un premier et un second réseaux de commutation (SWF_A, SWF_B) ou un autre élément de commutation. Ces éléments de commutation sont utilisés pour réaliser des opérations de commutation de façon uniforme, l'un des éléments de commutation servant d'élément de commutation actif dont les opérations de commutation sont utilisées, l'autre élément de commutation servant d'élément de commutation passif en secours de l'élément de commutation actif. Pour détecter aussi rapidement que possible toute défaillance survenant dans les éléments de commutation d'un tel système de commutation redondant, on surveille leur fonctionnement en comparant les données des canaux de sortie correspondants des premier et second éléments de commutation. Si cette comparaison indique que les données contenues dans l'un quelconque des canaux de sortie correspondants ne sont pas identiques, on réalise un test interne pour au moins un des éléments de commutation, de façon à vérifier les données du canal de sortie en cause. Le ou les tests de comparaison internes sont utilisés comme base pour la sélection de l'élément de commutation devant continuer à servir d'élément de commutation actif.

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