Method and apparatus for managing the statistical multiplexing of data in digital communication networks

  • US 5,689,499 A
  • Filed: 08/04/1995
  • Issued: 11/18/1997
  • Est. Priority Date: 03/26/1993
  • Status: Expired due to Term
First Claim
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1. A method for supporting a plurality of virtual channel connections within a single virtual path in a digital communications network operating in the Asynchronous Transfer Mode (ATM), where said virtual channel connections have no guarantees of rate at which cells on that connection can be transmitted, but also have no constraint on said rate save that inherent on said virtual path connection, said method comprising the steps of:

  • storing cells arriving for transmission on said virtual path in a buffer for transmission of cells on said virtual path in conformance with said constraint on said rate;

    detecting whether buffer overflow is threatened by the storage of further cells arriving for transmission on said virtual path; and

    ,while buffer overflow is threatened, admitting for storage in said buffer cells only on such of said virtual channel connections on which the previous cell admitted was not indicated by the header of said previous cell as being end of transmission on said virtual channel; and

    ,at all times not admit for storage in said buffer any cells on said virtual channel connections for which since the previous indication of said end of transmission on said virtual channel connection there has been any rejection of cells for storage.

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