To provide a cross bar capable of preventing data transfer processing of the following data packet from being set in a waiting condition due to a busy condition (port competition) of a forward data packet for improving the throughput.
This cross bar 100 is provided with an input queue group, in which an input queue queueing data packets directed to a destination W and a destination Y for data transfer and an input queue queueing data packets directed to a destination X and a destination Y for data transfer are arranged in multiple levels in each of an input port A, an input port B, an input port C, and an input port D, and a distribution processing part 110 for distributing the data packets to the input queue groups, according to the data transfer destination (that is, the destinations W and Y or the destinations X and Z) inputted to the input ports.
SUZUKI NOBUYUKI
NAKAMURA SHU
ARAI HIDETO
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