Telecommunications switch

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) G06E 3/00 (2006.01) G06F 15/80 (2006.01)

Patent

CA 2285207

A self-routing switch such as a Banyan switch has a controller which recognises incoming routing requests which would give rise to blocking in the switch and makes an optimum selection of queued requests which can be handled without blocking. The controller is implemented by means of an optical neural network having a light source array (14) to illuminate a photodetector array (26) through a mask (15), there being a light source array element (20) and a photodetector element (27) for each possible path through the switch. The assignment of paths to array locations is such that, for the path corresponding to any light source array element, the photodetector array element positions corresponding to the paths blocked thereby form a pattern which is a shifted version of the pattern formed by the photodetector array elements corresponding to the paths blocked by a path corresponding to any other light source array element, whereby a single mask may be employed.

Un commutateur à acheminement automatique, tel qu'un commutateur de Banyan, comporte un contrôleur qui reconnaît les demandes d'acheminement entrantes susceptibles de provoquer un blocage dans le commutateur et fait une sélection optimale des demandes en attente pouvant être traitées sans blocage. Le contrôleur est constitué d'un réseau de neurones optique comprenant un ensemble de sources lumineuses (14) qui illuminent un ensemble de photodétecteurs (26) au travers d'un masque (15), chaque traversée possible du commutateur comportant un élément de l'ensemble de sources lumineuses (20) et un élément photodétecteur (27). L'attribution des chemins menant aux emplacements des ensembles est tel que, pour le chemin correspondant à n'importe quel élément de l'ensemble de sources lumineuses, les positions de l'élément de l'ensemble photodétecteur correspondant aux chemins bloqués forment un motif qui est une version décalée du motif formé par les éléments de l'ensemble photodétecteur correspondant aux chemins bloqués par un trajet correspondant à n'importe quel élément de l'ensemble de sources lumineuses, ce qui permet d'utiliser un seul masque.

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