Method for connection acceptance control and optimal multi-media content delivery over networks

  • US 7,334,044 B1
  • Filed: 06/25/1999
  • Issued: 02/19/2008
  • Est. Priority Date: 11/17/1998
  • Status: Expired due to Fees
First Claim
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1. A method for optimal multimedia content delivery over networks from a server to one or more clients, comprising:

  • delineating a state variable that represents a data rate for delivery of multimedia content having a fixed duration and, wherein an initial data rate is equal to or greater than a minimum flow rate, and wherein the minimum flow rate ensures that all required content will be available to each client when needed, and a subsequent data rate, which is equal to or less than a real-time rate of play back of the multimedia content;

    delineating a set of conditions which represent time-varying constraints on the data rate of said multimedia content said conditions including;

    (1) the total data rate for all clients does not exceed the maximum throughput of the server or network, whichever is least;

    (2) the data rate from server to client does not exceed the maximum data rate for the client;

    (3) the data rate of the client will never overflow a client buffer;

    (4) the server will never underflow; and

    (5) the data rate from the server will never be less than the client'"'"'s minimum data rate, and wherein the minimum data rate is a non-increasing function of time obtained by dividing the content not yet delivered by the remaining play time;

    delineating a cost function which represents the value of a proposed solution;

    performing periodic computations in compliance with conditions (1)-(5) to obtain a state value that maximizes said cost function; and

    periodically adjusting the data rate to each client to maintain an optimal solution over a given period of time.

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