Link adaptation method and apparatus in wireless LAN system
AssigneeLG Electronics Inc.
InventorsYong Ho Seok, Yu Jin Noh, Bong Hoe Kim, Dae Won Lee
Life of this patent
Estimating the term…
Abstract
A link adaptation method performed by a station (STA) in a wireless local area network (LAN) system supporting multi-user multiple-input multiple-output (MU-MIMO) is provided. The method includes: receiving a modulation and coding scheme (MCS) request, a steered sounding physical layer convergence procedure (PLOP) protocol data unit (PPDU) which is beam-formed to the STA, and a MIMO indicator including MU-MIMO-related information from an access point (AP); and transmitting feedback information including an MCS acquired from the steered sounding PPDU and the MU-MIMO-related information to the AP in response to the MCS request.
Claims12
A method for a wireless local area network system supporting multi-user multiple-input multiple-output (MU-MIMO), the method comprising:
- receiving, by a station (STA), a feedback request from an access point, the feedback request including a request field and a MIMO indicator, the request field indicating a request for a channel feedback, the MIMO indicator including information related to paired STAs that are targets of MU-MIMO scheme together with the STA;
- and
- transmitting, by the STA, feedback information to the access point as a response to the feedback request, the feedback information including channel information and stream information,
- wherein the channel information indicates a recommended modulation and coding scheme (MCS) that is estimated based on the feedback request, and
- wherein the stream information indicates a number of recommended spatial streams that is estimated based on the feedback request.
A station (STA) for a wireless local area network system supporting multi-user multiple-input multiple-output (MU-MIMO), the STA comprising:
- a radio frequency (RF) unit;
- and
- a processor operatively coupled to the RF unit and configured to:
- instruct the RF unit to receive a feedback request from an access point, the feedback request including a request field and a MIMO indicator, the request field indicating a request for a channel feedback, the MIMO indicator including information related to paired STAs that are targets of MU-MIMO scheme together with the STA;
- and
- instruct the RF unit to transmit feedback information to the access point as a response to the feedback request, the feedback information including channel information and stream information,
- wherein the channel information indicates a recommended modulation and coding scheme (MCS) that is estimated based on the feedback request, and
- wherein the stream information indicates a number of recommended spatial streams that is estimated based on the feedback request.
A method for a wireless local area network system supporting multi-user multiple-input multiple-output (MU-MIMO), the method comprising:
- transmitting, by an access point, a feedback request to a station (STA), the feedback request including a request field and a MIMO indicator, the request field indicating a request for a channel feedback, the MIMO indicator including information related to paired STAs that are targets of MU-MIMO scheme together with the STA;
- and
- receiving, by the access point, feedback information from the STA as a response to the feedback request, the feedback information including channel information and stream information,
- wherein the channel information indicates a recommended modulation and coding scheme (MCS) that is estimated by the STA based on the feedback request, and
- wherein the stream information indicates a number of recommended spatial streams that is estimated by the STA based on the feedback request.
A device for a wireless local area network system supporting multi-user multiple-input multiple-output (MU-MIMO), the device comprising:
- a radio frequency (RF) unit;
- and
- a processor operatively coupled to the RF unit and configured to:
- instruct the RF unit to transmit a feedback request to a station (STA), the feedback request including a request field and a MIMO indicator, the request field indicating a request for a channel feedback, the MIMO indicator including information related to paired STAs that are targets of MU-MIMO scheme together with the STA;
- and
- instruct the RF unit to receive feedback information from the STA as a response to the feedback request, the feedback information including channel information and stream information,
- wherein the channel information indicates a recommended modulation and coding scheme (MCS) that is estimated by the STA based on the feedback request, and
- wherein the stream information indicates a number of recommended spatial streams that is estimated by the STA based on the feedback request.
Dependencies are inferred from the claim text.