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Active queue management with flow proportional buffering

  • US 6,901,593 B2
  • Filed: 05/08/2001
  • Issued: 05/31/2005
  • Est. Priority Date: 05/08/2001
  • Status: Expired due to Term
First Claim
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1. A method for dynamically allocating a buffer, the method comprising:

  • estimating a number of active connections;

    adjusting a queue threshold for a queue by setting the queue threshold (T(n)) according to the relation;

    T

    (n)
    =max

    {P2

    N^

    (n)
    -1
    ,γ



    N^

    (n)
    }
    ,
    where P is a bandwidth-delay product, {circumflex over (N)}(n) is an estimated number of active connections at measurement time n, and γ

    is a predetermined parameter that represents a minimum number of packets buffered per connection to avoid a TCP timeout;

    computing a drop probability based, at least in part, on the adjusted threshold and a measured queue size;

    executing a packet drop routine based upon the drop probability.

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