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Packet flow control apparatus and a method for controlling the same

  • US 20010014081A1
  • Filed: 02/06/2001
  • Published: 08/16/2001
  • Est. Priority Date: 02/16/2000
  • Status: Active Grant
First Claim
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1. A packet flow control apparatus performing flow control of packets each having variable length, comprising:

  • a buffer memory for temporarily accumulating arrived packets until a sending time for each packet;

    a counter means updated based on a rate determined in accordance with a packet length calculated by a counter value of the counter means and limited flow of packets;

    a sending time determining means for determining the sending time of each packet based on the counter value and a present time; and

    a sending order control means for managing a sending order of each packet accumulated in the buffer memory, and for sending a read instruction of each packet to the buffer memory, based on the sending time determined by the sending time determining means;

    wherein the sending time determining means includes a memory means storing parameters which can determine a state of change of the counter value of the counter means for each control unit to independently control packet flow;

    when an input packet is written into the buffer memory, the sending time determining means obtains the sending time of the input packet based on the parameter having the same control unit as the input packet read out from the memory means; and

    the sending time determining means updates the parameters having the same control unit in the memory means based on a newly obtained sending time of the input packet, and transfers the newly obtained sending time of the input packet to the sending order control means.

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