Requests for transmission parameters in a multi-user scenario
AssigneeQUALCOMM Incorporated
InventorsSimone Merlin, Albert Van Zelst, Maarten Menzo Wentink
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Abstract
Link adaptation is supported in a multi-user MIMO environment. In some aspects, a frame including a transmission parameter request (e.g., a null data packet announcement (NDPA) including a modulation and coding scheme (MCS) request (MRQ)) specifies multiple destinations. In some aspects, a decision to transmit a frame specifying multiple destinations is based on whether all of destinations support providing feedback to such a frame. In some aspects, transmission parameter feedback (e.g., MCS feedback (MFB)) including channel estimate information is provided in a case where MFB of type MU is requested.
Claims20
An apparatus for wireless communication, comprising:
- a transceiver configured to receive a null data packet announcement (NDPA) frame, wherein the frame comprises a modulation and coding scheme request (MRQ) and further comprises station information (STA Info) fields that collectively include identifiers of a plurality of apparatuses;
- and
- a processor coupled to the transceiver and configured to determine whether the apparatus is identified by one of the identifiers in the NDPA frame, and further configured to generate a modulation and coding scheme feedback (MFB) response to the MRQ in the NDPA frame if the determination indicates that the apparatus is identified by one of the identifiers,
- wherein the transceiver is further configured to transmit the MFB response.
A method of wireless communication, comprising:
- receiving a null data packet announcement (NDPA) frame at a first apparatus, wherein the frame comprises a modulation and coding scheme request (MRQ) and further comprises station information (STA Info) fields that collectively include identifiers of a plurality of apparatuses;
- determining whether the first apparatus is identified by one of the identifiers in the NDPA frame;
- generating a modulation and coding scheme feedback (MFB) response to the MRQ in the NDPA frame if the determination indicates that the first apparatus is identified by one of the identifiers;
- and
- transmitting the MFB response.
An apparatus for wireless communication, comprising:
- means for receiving a null data packet announcement (NDPA) frame, wherein the frame comprises a modulation and coding scheme request (MRQ) and further comprises station information (STA Info) fields that collectively include identifiers of a plurality of apparatuses;
- means for determining whether the apparatus is identified by one of the identifiers in the NDPA frame, wherein the means for determining is configured to generate a modulation and coding scheme feedback (MFB) response to the MRQ in the NDPA frame if the determination indicates that the apparatus is identified by one of the identifiers;
- and
- means for transmitting the MFB response.
A non-transitory computer-readable storage medium storing codes executable by a computer to:
- receive a null data packet announcement (NDPA) frame at a first apparatus, wherein the frame comprises a modulation and coding scheme request (MRQ) and further comprises station information (STA Info) fields that collectively include identifiers of a plurality of apparatuses;
- determine whether the first apparatus is identified by one of the identifiers in the NDPA frame;
- generate a modulation and coding scheme feedback (MFB) response to the MRQ in the NDPA frame if the determination indicates that the first apparatus is identified by one of the identifiers;
- and
- transmit the MFB response.
A wireless node, comprising:
- an antenna;
- a transceiver configured to receive a null data packet announcement (NDPA) frame via the antenna, wherein the frame comprises a modulation and coding scheme request (MRQ) and further comprises station information (STA Info) fields that collectively include identifiers of a plurality of wireless nodes;
- and
- a processor coupled to the transceiver and configured to determine whether the wireless node is identified by one of the identifiers in the NDPA frame, and further configured to generate a modulation and coding scheme feedback (MFB) response to the MRQ in the NDPA frame if the determination indicates that the wireless node is identified by one of the identifiers,
- wherein the transceiver is further configured to transmit the MFB response.
Dependencies are inferred from the claim text.