| http://www.w3.org/ns/prov#value | - r 22 of the present invention is illustrated as the flow chart in FIG. 7. [0069] The central arbiter 22 receives arbitration request signals from all input buffers 21 with respect to all output ports. [0070] In a case that there is a request signal, it is indicated that an arbitration request is received from the cell address buffer showing the corresponding output port of the corresponding input
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