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System and method for accommodating ABR and CBR traffic on a shared communications channel

  • US 5,841,777 A
  • Filed: 08/30/1996
  • Issued: 11/24/1998
  • Est. Priority Date: 08/30/1996
  • Status: Expired due to Term
First Claim
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1. A method of transmitting a first and a second type of data from a client station to a master station via a shared communication channel in a communications system, comprising the steps of:

  • (A) dividing the channel into a plurality of frames, each having a set of consecutive constant time slots, the slots within each of the frames being apportioned into a first region for the first type of data and a second region for the second type of data;

    (B) determining whether available slots in the second region of a current frame can accommodate a reservation request from the client station to transmit the second type of data with a predetermined data length;

    (C) expanding the second region into the first region in the current frame to accommodate the reservation request and contracting the second region of subsequent frames by an amount equal to the expansion if the available slots in the second region of the current frame cannot handle the reservation request such that the average size of the second region of the current and subsequent frames remains unchanged.

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