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Tiered contention multiple access (TCMA): a method for priority-based shared channel access

  • US 9,270,606 B2
  • Filed: 09/09/2013
  • Issued: 02/23/2016
  • Est. Priority Date: 11/03/2000
  • Status: Expired due to Fees
First Claim
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1. A method for transmitting a packet, the method comprising:

  • determining, at a node having a buffer, an urgency class for the packet according to a schedule, wherein each of a plurality of urgency classes is assigned a plurality of differentiating parameters with different values from values of other urgency classes, the plurality of differentiating parameters comprising a backoff window for drawing an initial backoff counter for the packet and a persistence factor, wherein the persistence factor is different for each urgency class of the plurality of urgency classes, wherein the persistence factor is to derive a subsequent backoff window from which a subsequent backoff counter for the packet is drawn randomly upon a transmission retrial of the packet;

    using, by the node, different urgency arbitration times for different urgency classes of the plurality of urgency classes, wherein each of the different urgency arbitration times is associated with a different quality of service priority; and

    transmitting, by the node, the packet in the urgency class before transmitting another packet of a lower urgency class.

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