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Slotted OFDMA based random access

  • US 10,560,295 B2
  • Filed: 06/25/2016
  • Issued: 02/11/2020
  • Est. Priority Date: 06/25/2015
  • Status: Active Grant
First Claim
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1. A method of controlling operation of a wireless network comprising an access point and a plurality of stations, comprising:

  • transmitting, by the access point, a control message comprising a parameter indicating start of an uplink multiuser random access transmission opportunity (RA-TXOP) during which multiple of the plurality of stations are permitted to attempt uplink transmissions using orthogonal frequency division multiplexing access (OFDMA);

    receiving a number of response messages from the multiple stations during a random access slot in the RA-TXOP; and

    transmitting, based on identities of stations that sent the response messages, an acknowledgement message identifying which of the multiple stations have succeeded and/or are allowed to transmit in an upcoming arbitrated contention-free transmission opportunity,wherein the control message further includes an acknowledgement policy parameter having a first value or a second value different from the first value, the first value indicating defering sending the acknowledgement message to an end of the random access slot and the second value indicating sending the acknowledgement message immediately after the response message.

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