Method of operating a scheduler of a crossbar switch and scheduler

摘要

The present invention relates to a method of operating a scheduler (100) of a crossbar switch (200), wherein said scheduler (100) comprises a tree structure comprising an input stage (IS) with a plurality of entry modules (E_1, E_2, ..) and at least one decider stage (DS_1, DS_2, ..), wherein each decider stage (DS_1, DS_2, ..) comprises at least one decider module (D_1_1, D_2_1, ..), wherein one or more modules (E_1, E_2, D_1_1, D_1_2, ..) are connected to a decider module (D_1_1, D_2_1, ..) of a subsequent decider stage (DS_1, DS_2, ..), wherein a packet reference is forwarded from said input stage (IS) or a decider stage to a subsequent decider stage depending on a forwarding decision that is made in a decider module (D_1_1, D_2_1, ..) characterized by the following steps: providing each packet reference with at least one individual attribute, storing accounting information for each of said modules (E_1, E_2, D_1_1, D_1_2), wherein said accounting information depends on the packet references and/or the individual attribute(s) of the packet references which are processed by the respective module (E_1, E_2, D_1_1, D_1_2), and making the forwarding decision depending on said accounting information.