Method and apparatus for wireless communication based on frequency selective transmission in wireless local area network
AssigneeElectronics and Telecommunications Research Institute
InventorsHyoung Jin KWON, Sok Kyu LEE, Jae Seung LEE, Min Ho CHEONG
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Abstract
Disclosed are a wireless communication method, and an access point and a station which perform the wireless communication method. A wireless communication method performed by an access point according to an embodiment may include performing channel sounding on a plurality of subchannels, identifying subchannels selected by stations among the subchannels, scheduling communications between the AP and the stations based on the selected subchannels, and transmitting a data frame to the stations through the subchannels based on a scheduling result.
Claims19
A wireless communication method performed by an access point (AP), the method comprising:
- transmitting an announcement frame through a channel including a plurality of subchannels;
- transmitting, a Short Inter-Frame Space (SIFS) after the announcement frame, a sounding frame for channel sounding through the channel including the plurality of subchannels;
- and
- receiving feedback frames including feedback information of the stations from the stations simultaneously, wherein the feedback frames for respective stations are transmitted through the subchannels allocated to the stations,
- wherein the announcement frame includes station information indicating stations being requested to transmit feedback and frequency resource information for which the AP requests feedback, and
- wherein the feedback frame is transmitted in response to a polling frame, and the feedback frame is transmitted a SIFS after the polling frame.
A wireless communication method performed by a station, the method comprising:
- receiving an announcement frame from an access point (AP) through a channel including a plurality of subchannels;
- receiving, from the AP a Short Inter-Frame Space (SIFS) after the announcement frame, a sounding frame for channel sounding through the channel including the plurality of sub channels;
- and
- transmitting a feedback frame to the AP through a subchannel selected from among the plurality of subchannels, wherein the feedback frame includes feedback information of the station and at least one other station, and the feedback frame is simultaneously transmitted by the station and the at least one other station through the subchannels allocated to the respective stations,
- wherein the announcement frame includes station information indicating stations being requested to transmit feedback and frequency resource information for which the AP requests feedback, and
- wherein the feedback frame is transmitted in response to a polling frame, and the feedback frame is transmitted a SIFS after the polling frame.
An access point (AP) comprising:
- at least one antenna;
- a receiver;
- a transmitter;
- and
- a processor,
- wherein the processor is configured to:
- cause the transmitter to transmit an announcement frame through a channel, the channel including a plurality of subchannels;
- cause the transmitter to transmit, a Short Inter-Frame Space (SIFS) after the announcement frame, a sounding frame for channel sounding through the channel including the plurality of subchannels;
- and
- cause the receiver to receive feedback frames including feedback information of stations from the stations simultaneously, wherein the feedback frames for respective stations are transmitted through the subchannels allocated to the stations,
- wherein the announcement frame includes station information indicating stations being requested to transmit feedback and frequency resource information for which the AP requests feedback, and
- wherein the feedback frame is transmitted in response to a polling frame, and the feedback frame is transmitted a SIFS after the polling frame.
Dependencies are inferred from the claim text.