# US 2018/0027592 A1 · Channel access method for very high throughput (vht) wireless local access network system and station supporting the channel access method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027592 A1 - Document ID: US20180027592A1 - Status: Published application - Kind: A1 - Application number: 15/708,503 - Filed: 2017-09-19 - Published: 2018-01-25 - Earliest claimed: 2008-06-18 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Yong Ho SEOK - Web page: https://patentgrep.com/patent/US20180027592A1 ## CPC - H04W 74/0816: with collision avoidance - H04W 4/20: Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for transmitting data in a wireless communication system, the method includes transmitting, by a first station, a plurality of request to send (RTS) frames to a second station through a plurality of subchannels, each of the plurality of RTS frames being transmitted through a corresponding one of the plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth; receiving, by the first station, at least one clear to send (CTS) frame in response to at least one of the plurality of RTS frames from the second station through at least one idle subchannel of the plurality of subchannels; and transmitting, by the first station, a data frame to the second station after receiving the at least one CTS frame, wherein each of the plurality of RTS frames includes first channel information related to the plurality of subchannels. ## Claims ### Claim 1 A method for transmitting data in a wireless communication system, the method comprising: transmitting, by a first station, a plurality of request to send (RTS) frames to a second station through a plurality of subchannels, each of the plurality of RTS frames being transmitted through a corresponding one of the plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth; receiving, by the first station, at least one clear to send (CTS) frame in response to at least one of the plurality of RTS frames from the second station through at least one idle subchannel of the plurality of subchannels; and transmitting, by the first station, a data frame to the second station after receiving the at least one CTS frame, wherein each of the plurality of RTS frames includes first channel information related to the plurality of subchannels, wherein the at least one CTS frame includes second channel information related to the at least one idle subchannel through which the at least one CTS frame is received by the first station and the data frame is transmitted through the at least one idle subchannel indicated by the second channel information, and wherein a number of the at least one idle subchannel through which the at least one CTS frame is received is equal to or less than a number of the plurality of subchannels through which the plurality of RTS frames are transmitted. ### Claim 2 (depends on 1) The method of claim 1, wherein the number of the at least one idle subchannel is 1, 2 or 4 when the number of the plurality of subchannels is 4. ### Claim 3 (depends on 1) The method of claim 1, wherein the number of the at least one idle subchannel is 1 or 2 when the number of the plurality of subchannels is 2. ### Claim 4 (depends on 1) The method of claim 1, wherein the first station is a Very High Throughput (VHT) non-Access Point (AP) station and the second station is a VHT AP station. ### Claim 5 A device comprising: a transceiver; and a processor operatively connected to the transceiver and configured to: instruct the transceiver to transmit a plurality of request to send (RTS) frames to a station through a plurality of subchannels, each of the plurality of RTS frames being transmitted through a corresponding one of the plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth, instruct the transceiver to receive at least one clear to send (CTS) frame in response to at least one of the plurality of RTS frames from the station through at least one idle subchannel of the plurality of subchannels, and instruct the transceiver to transmit a data frame to the station after receiving the at least one CTS frame, wherein each of the plurality of RTS frames includes first channel information related to the plurality of subchannels, wherein the at least one CTS frame includes second channel information related to the at least one idle subchannel through which the at least one CTS frame is received by the device and the data frame is transmitted through the at least one idle subchannel indicated by the second channel information, and wherein a number of the at least one idle subchannel through which the at least one CTS frame is received is equal to or less than a number of the plurality of subchannels through which the plurality of RTS frames are transmitted. ### Claim 6 (depends on 5) The device of claim 5, wherein the number of the at least one idle subchannel is 1, 2 or 4 when the number of the plurality of subchannels is 4. ### Claim 7 (depends on 5) The device of claim 5, wherein the number of the at least one idle subchannel is 1 or 2 when the number of the plurality of subchannels is 2. ### Claim 8 (depends on 5) The device of claim 5, wherein the device is a Very High Throughput (VHT) non-Access Point (AP) station and the station which transmits the at least one CTS frame is a VHT AP station. ### Claim 9 A method for receiving data in a wireless communication system, the method comprising: receiving, by a first station, a plurality of request to send (RTS) frames from a second station through a plurality of subchannels, each of the plurality of RTS frames being received through a corresponding one of the plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth; transmitting, by the first station, at least one clear to send (CTS) frame in response to at least one of the plurality of RTS frames to the second station through at least one idle subchannel of the plurality of subchannels; and receiving, by the first station, a data frame from the second station after transmitting the at least one CTS frame, wherein each of the plurality of RTS frames includes first channel information related to the plurality of subchannels, wherein the at least one CTS frame includes second channel information related to the at least one idle subchannel through which the at least one CTS frame is transmitted by the first station and the data frame is received through the at least one idle subchannel indicated by the second channel information, and wherein a number of the at least one idle subchannel through which the at least one CTS frame is transmitted is equal to or less than a number of the plurality of subchannels through which the plurality of RTS frames are received. ### Claim 10 (depends on 9) The method of claim 9, wherein the number of the at least one idle subchannel is 1, 2 or 4 when the number of the plurality of subchannels is 4. ### Claim 11 (depends on 9) The method of claim 9, wherein the number of the at least one idle subchannel is 1 or 2 when the number of the plurality of subchannels is 2. ### Claim 12 (depends on 9) The method of claim 9, wherein the first station is a Very High Throughput (VHT) non-Access Point (AP) station and the second station is a VHT AP station. ### Claim 13 A device comprising: a transceiver; and a processor operatively connected to the transceiver and configured to: instruct the transceiver to receive a plurality of request to send (RTS) frames from a station through a plurality of subchannels, each of the plurality of RTS frames being received through a corresponding one of the plurality of subchannels, each of the plurality of subchannels having a 20 megahertz (MHz) bandwidth, instruct the transceiver to transmit at least one clear to send (CTS) frame in response to at least one of the plurality of RTS frames to the station through at least one idle subchannel of the plurality of subchannels, and instruct the transceiver to receive a data frame from the station after transmitting the at least one CTS frame, wherein each of the plurality of RTS frames includes first channel information related to the plurality of subchannels, wherein the at least one CTS frame includes second channel information related to the at least one idle subchannel through which the at least one CTS frame is transmitted by the device and the data frame is received through the at least one idle subchannel indicated by the second channel information, and wherein a number of the at least one idle subchannel through which the at least one CTS frame is transmitted is equal to or less than a number of the plurality of subchannels through which the plurality of RTS frames are received. ### Claim 14 (depends on 13) The device of claim 13, wherein the number of the at least one idle subchannel is 1, 2 or 4 when the number of the plurality of subchannels is 4. ### Claim 15 (depends on 13) The device of claim 13, wherein the number of the at least one idle subchannel is 1 or 2 when the number of the plurality of subchannels is 2. ### Claim 16 (depends on 13) The device of claim 13, wherein the device is a Very High Throughput (VHT) non-Access Point (AP) station and the station which receives the at least one CTS frame is a VHT AP station.