Importance

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Abstract

The present invention relates to a scheduler, also referred to as a service discipline, for a system comprising a plurality of nodes sharing a plurality of resources such as wavelengths. The scheduler 2 of the invention schedules the transmission of data from a plurality of queues B.sub.1, B.sub.2, and B.sub.3 from a source node 1 to a plurality of destination nodes N.sub.1, N.sub.2, and N.sub.3 via a plurality of outlet ports P.sub.1, P.sub.2, P.sub.3, and P.sub.4 from said source node 1, each of said outlet ports P.sub.1, P.sub.2, P.sub.3, and P.sub.4 being associated with a resource OR.sub.1, OR.sub.2, OR.sub.3, and OR.sub.4, the data being transmitted via said resource to a destination node N.sub.1, N.sub.2, and N.sub.3, each of said nodes receiving data from all or some of said plurality of resources OR.sub.1, OR.sub.2, OR.sub.3, and OR.sub.4. The scheduler device 2 is characterized in that it comprises a plurality of servers S.sub.1, S.sub.2, S.sub.3, and S.sub.4, each of said servers being associated with a respective one of said resources of said plurality of resources OR.sub.1, OR.sub.2, OR.sub.3, and OR.sub.4, and each of said servers comprising scheduler means, said scheduler means being independent for each of said servers.

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First Claim