Apparatus for controlling packet output

Details Apparatus for controlling packet output Apparatus for controlling packet output

2007-03-13

2007-03-13

Pham, Chi (Department: 2616)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S352000, C370S395410, C370S417000

Reexamination Certificate

active

10281366

ABSTRACT:
In a packet scheduler, an arithmetic-operation controlling means designates output ports in a time-sharing manner and a parallel arithmetic operation means performs an arithmetic operation common with the queues of each designated output port to obtain packet output completion due times (evaluation factors) of the top packets of queues of each output port. Intra-port selecting means selects the evaluation factor of a packet that is to be preferentially output for each output port based on the result of the arithmetic operations. Then inter-port selecting means determines one to be most-preferentially output from the top packets selected based on the selected evaluation factors and the bandwidths for the output ports. Therefore, an apparatus for controlling packet output having such a packet scheduler can realize accurately control bandwidths of a plurality of queues, high-speed processing and the reduced size thereby being incorporated in hardware.

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