×

Medium access control for multi-channel OFDM in a wireless local area network

  • US 10,257,806 B2
  • Filed: 11/11/2014
  • Issued: 04/09/2019
  • Est. Priority Date: 11/11/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method for simultaneously communication with multiple communication devices in a wireless local area network, the method comprising:

  • allocating, by a first communication device, respective sub-channels of an orthogonal frequency division multiplexing (OFDM) channel to two or more second communication devices for uplink orthogonal frequency division multiple access (OFDMA) transmission from the two or more second communication devices, including;

    (i) allocating non-contiguous sub-channels by skipping a particular sub-channel of the OFDM channel, when the particular sub-channel is determined to be unavailable for transmission, and (ii) allocating a first sub-channel to a first one of the two or more second communication devices and a second sub-channel to a second one of the two or more second communication devices;

    providing, from the first communication device to the two or more second communication devices, i) indications of the respective sub-channels allocated for uplink OFDMA transmission from the two or more second communication devices, including indications of the non-contiguous sub-channel allocation, and ii) an indication of a length of the uplink OFDMA transmission from the two or more second communication devices; and

    receiving, at the first communication device, an uplink OFDMA data unit that includes at least a first OFDM data unit from the first one of the two or more second communication devices and a second OFDM data unit from the second one of the two or more second communication devices, wherein the first OFDM data unit i) has a duration in accordance with the indication of the length provided by the first communication device and ii) is transmitted from the first one of the two or more second communication devices via the first sub-channel allocated to the first one of the two or more second communication devices and the second OFDM data unit i) has the duration in accordance with the indication of the length provided by the first communication device and ii) is transmitted from the second one of the two or more second communication devices via the second sub-channel allocated to the second one of the two or more second communication devices.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×