Patent ID: 6904046
Filing Date: 2005-06-07
Classification: H04L

Abstract:
1. Data transmission system having a plurality of Local Area Networks (LANs) interconnected by a hub including a plurality of LAN adapters respectively connected to the plurality of LANs, the data transmission system comprising: a packet switch interconnecting the plurality of LAN adapters, wherein a packet transmitted by a first LAN adapter to the packet switch includes a header containing at least an address of a second LAN adapter to which the packer is forwarded, the packet switch which includes a plurality of N×N identical packet switch modules, each of the packet switch modules being associated with m input ports and m output ports having a rank selector which is hardwired to provide a rank k from 0 to N−1 to each column of N modules corresponding to the same output ports, the rank being provided to all memory blocks of the column in order to shift the physical address of each output port in the column by an offset of k×m, the input and output ports both being respectively connected to the plurality of LAN adapters, each pair of input port and output port defining a cross point at which is located a memory block for storing a data packet received from the input port corresponding to the cross point and which is to be forwarded to the output port corresponding to the cross point.