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Random access channel protocol

  • US 8,730,936 B2
  • Filed: 03/30/2011
  • Issued: 05/20/2014
  • Est. Priority Date: 12/17/2003
  • Status: Active Grant
First Claim
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1. A method of random access communications from a user element to an access point, the user element being operable to maintain a stack counter, the method comprising:

  • a) storing at least one packet in a buffer;

    b) transmitting the packet for reception by the access point if the stack counter is zero;

    c) receiving a feedback message from the access point wherein the feedback message is one of;

    1) an idle message indicating that no transmissions were detected during the slot,2) a successful transmission message indicating that a packet was successfully received during the slot, and3) a collision message indicating that at least one packet was detected but could not be successfully received during the slot;

    d) when the received feedback message is a successful transmission message and the stack counter is zero, removing the transmitted packet from the buffer;

    e) when the received feedback message is a collision message, generating a random number and setting the stack counter to an amount determined by the generated random number; and

    f) when the received feedback message is an idle message and the stack counter is greater than zero, decrementing the stack counter.

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