Patent ID: 8059640
Filing Date: 2011-11-15
Classification: H04L

Abstract:
1. A multistage control circuit which, for a multistage switch that arranges a plurality of switch stages having a plurality of unit switches which can switch routes between input and output by setting between a plurality of input ports and a plurality of output ports discriminated by destination address and connects the plurality of switch stages in accordance with a predetermined rule, constructs a transmission route from said input port to said output port in accordance with said destination address designated for each said input port by setting the unit switch for each switch stage, comprising a bus, a plurality of control elements, and cluster formation means, wherein said bus is connected to all said control elements, said control element comprises transmitting/receiving means for performing transmission/reception of said destination address with respect to another said control element through the bus, comparison means for comparing said destination address designated for said unit switch corresponding to oneself with said destination address designated for said unit switch corresponding to another said control element, and switch control signal generation means for generating a switch control signal setting said unit switch corresponding to oneself on the basis of a comparison result of said comparison means, and said cluster formation means divides said plurality of control elements into a plurality of clusters by defining a range within which said destination address is transmitted/received.