Orthogonal frequency division multiple access communication apparatus and communication method
AssigneePanasonic Intellectual Property Corporation of America
InventorsLEI HUANG, ROJAN CHITRAKAR, YOSHIO URABE, ISAMU YOSHII
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Abstract
An communication apparatus of the present disclosure comprises a receiver that receives a Trigger frame for allocating resource units (RUs) for random access and another frame including Random Access parameter element that comprises a first field indicating an OFDMA contention window (OCW) minimum value (OCWmin) and a second field indicating an OCW maximum value (OCWmax); and control circuitry that controls Uplink OFDMA-based Random Access (UORA) procedure using the OCWmin and the OCWmax.
Claims7
An integrated circuit adapted to control a process of a communication apparatus that is a 20 MHz operating station, the process comprising:
- receiving a Trigger frame for allocating resource units (RU(s)) for random access and another frame including a Random Access parameter element that comprises a first field indicating an OFDMA contention window (OCW) minimum value (OCWmin), wherein the RU(s) include at least one RU that is restricted from being used for the 20 MHz operating station;
- controlling an Uplink OFDMA-based Random Access (UORA) procedure using the OCWmin;
- and
- decrementing an OFDMA Back-Off (OBO) counter to zero when the OBO counter is not greater than a number of available RU(s) for random access in the Trigger frame, the available RU(s) being RU(s) unrestricted from being used for the 20 MHz operating station, or decrementing the OBO counter by the number of the available RU(s) for random access otherwise.
Dependencies are inferred from the claim text.