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US 10,321,481 B2Granted
Wireless communication device
AssigneeKabushiki Kaisha Toshiba
InventorsToshihisa Nabetani, Hiroki Mori
Life of this patent
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Abstract
According to one embodiment, a wireless communication device includes: controlling circuitry configured to determine parameter information on a backoff time of carrier sensing performed according to CSMA/CA (carrier sense multiple access/collision avoidance) on basis of a number of other wireless communication devices which have established connections with the wireless communication device; and a transmitter configured to transmit a first frame which instructs to transmit a response frame according to the parameter information.
Claims15
A wireless communication device communicating with a plurality of other wireless communication devices comprising:
- controlling circuitry configured to select, from among the other wireless communication devices, first wireless communication devices for inquiring whether to have data for uplink multiuser multiplexing transmission and determine parameter information of a contention window used in CSMA/CA (carrier sense multiple access/collision avoidance) for the first wireless communication devices on basis of a number of the first wireless communication devices;
- a transmitter configured to transmit a first frame to the first wireless communication devices, wherein the first frame includes information to specify the first wireless communication devices and the parameter information, and the first frame instructs the first wireless communication devices to use the contention window based on the parameter information for acquisition of a transmission right for transmission of a response frame for the first frame;
- and
- a receiver configured to sequentially receive second frames transmitted based on the acquired transmission right from the first wireless communication devices in a single user manner wherein the second frames are response frames for the first frame and the transmission right is acquired under carrier sensing during a backoff time determined based on a value selected randomly from the contention window,
- wherein the controlling circuitry is configured to select second wireless communication devices for execution of uplink multiuser multiplexing transmission from among the first wireless communication devices which have transmitted the second frame.
2 more elements
A wireless communication device communicating with a plurality of other wireless communication devices, comprising:
- controlling circuitry configured to select, from among the other wireless communication devices, first wireless communication devices for inquiring whether to have data for uplink multiuser multiplexing transmission and determine parameter information of a contention window used in CSMA/CA (carrier sense multiple access/collision avoidance) for the first wireless communication devices on a basis of a number of the first wireless communication devices;
- a transmitter configured to transmit a first frame to the first wireless communication devices, wherein the first frame includes information to specify the first wireless communication devices and the parameter information, and the first frame instructs the first wireless communication devices to use the contention window based on the parameter information for acquisition of transmission right for transmission of a response frame for the first frame;
- and
- a receiver configured to sequentially receive second frames transmitted based on the acquired transmission right from the first wireless communication devices in a single user manner, wherein the second frames are response frames for the first frame and
- include identification of whether the first wireless communication devices have the data for uplink multiuser multiplexing transmission,
- wherein
- the controlling circuitry is configured to specify wireless communication devices having the data for uplink multiuser multiplexing transmission from among the first wireless communication devices based on the received second frames and to select second wireless communication devices for execution of the uplink multiuser multiplexing transmission from among the specified wireless communication devices.
4 more elements
A wireless communication device comprising:
- a receiver configured to receive a first frame including information to specify one or more wireless communication devices from a base station;
- and
- controlling circuitry configured to determine parameter information of a contention window used in CSMA/CA based on a number of the wireless communication devices specified in the first frame and perform carrier sensing during a backoff time determined based on a value selected randomly from the contention window specified by the parameter information;
- and
- a transmitter configured to transmit a response frame for the first frame in a single user manner in accordance with a transmission right acquired when a result of the carrier sensing is idle.
2 more elements
Dependencies are inferred from the claim text.