Beamforming feedback frame formats within multiple user, multiple access, and/or MIMO wireless communications
View Patent ↗Beamforming feedback frame formats within multiple user, multiple access, and/or MIMO wireless communications. A transmitting wireless communication device (TX) transmits a sounding frame to one or more receiving wireless communication devices (RXs) using one or more antennae and one or more clusters. Any antenna/cluster combination may be employed in communications between TXs and RXs. The one or more RXs receive/process the sounding frame to determine a type of beamforming feedback frame to be provided to the TX. Any one of a variety of beamforming feedback frame types and a types of information may be contained within a respective beamforming feedback frame including various characteristics of the respective communication channel between the TX and each of the various RXs. A common beamforming feedback frame format may be supported and employed by all such wireless communication devices (e.g., TX and RXs) when performing MU-MIMO operation such as in accordance with IEEE 802.11ac/VHT.
1. A method for execution by a first wireless communication device, the method comprising:
employing a first one or more antennae to receive a sounding frame transmitted from a second wireless communication device via a communication channel using a first one or more clusters;
processing the sounding frame to determine a beamforming feedback frame type;
generating a beamforming feedback frame having the determined beamforming feedback frame type, indicating the first wireless communication device, and indicating characteristics of the communication channel corresponding to:
a second one or more clusters being reported within the beamforming feedback frame; and
a correspondence between the second one or more clusters and a second one or more antennae being reported within the beamforming feedback frame, such that each of the first one or more clusters and the second one or more clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band;
the second wireless communication device receiving the beamforming feedback frame from the first wireless communication device, determining a beamforming parameter based on the beamforming feedback frame, and transmitting a multi-user packet to the first wireless communication device based on the beamforming parameter.
2. The method of claim 1 , wherein the beamforming feedback frame type corresponding to a channel/state information (CSI) report, a compressed beamforming report, or a non-compressed beamforming report.
3. The method of claim 1 , wherein the multi-user packet being a multiple input multiple output (MU-MIMO) packet.
4. The method of claim 1 , wherein the multi-user packet being an orthogonal frequency division multiple access (OFDMA) packet.
5. The method of claim 1 , wherein the first one or more antennae being the second one or more antennae.
6. The method of claim 1 , wherein the first one or more clusters being the second one or more clusters.
7. The method of claim 1 , wherein the characteristics of the communication channel corresponding to at least one of:
an average signal to noise ratio (SNR) within a receive chain of the first wireless communication device processing the sounding frame;
an average SNR corresponding to a tone within the receive chain of the first wireless communication device processing the sounding frame;
an average SNR of a space time stream (STS) by which the sounding frame transmitted from the second wireless communication device; and
an average SNR corresponding to a tone of the STS by which the sounding frame transmitted from the second wireless communication device.
8. The method of claim 1 , further comprising:
employing the first one or more antennae to transmit the beamforming feedback frame to the second wireless communication device.
9. The method of claim 1 , wherein the correspondence between the second one or more clusters and the second one or more antennae being reported within the beamforming feedback frame indicating which of the first or second one or more clusters being employed on which of the first or second one or more antennae to transmit the beamforming feedback frame to the second wireless communication device.
10. The method of claim 1 , further comprising:
the first wireless communication device includes a wireless station (STA); and
the second wireless communication device includes an access point (AP).
11. The method of claim 1 , further comprising:
a plurality of wireless communication devices receiving the sounding frame transmitted from the second wireless communication device;
each of the plurality of wireless communication devices generating a respective beamforming feedback frame;
each of the plurality of wireless communication devices transmitting its respective beamforming feedback frame to the second wireless communication device;
the second wireless communication determining a beamforming parameter based on the respective beamforming feedback frames received from each of the plurality of wireless communication devices; and
in accordance with the beamforming parameter, the second wireless communication device transmitting a multi-user packet to the plurality of wireless communication devices or a subset of the plurality of wireless communication devices.
12. The method of claim 11 , further comprising:
the second wireless communication device includes an access point (AP); and
the plurality of wireless communication devices includes a plurality of wireless stations (STAs).
13. A method for execution by a first wireless communication device, the method comprising:
employing one or more antennae to receive a sounding frame transmitted from a second wireless communication device via a communication channel using a first one or more clusters;
processing the sounding frame to determine a beamforming feedback frame type;
generating a beamforming feedback frame having the determined beamforming feedback frame type, indicating the first wireless communication device, and indicating characteristics of the communication channel corresponding to:
the first one or more clusters being reported within the beamforming feedback frame; and
a correspondence between the first one or more clusters and the one or more antennae being reported within the beamforming feedback frame, such that each of the first one or more clusters and a second one or more clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band;
employing the one or more antennae to transmit the beamforming feedback frame to the second wireless communication device, wherein the characteristics of the communication channel corresponding to at least one of:
an average signal to noise ratio (SNR) within a receive chain of the first wireless communication device processing the sounding frame;
an average SNR corresponding to a tone within the receive chain of the first wireless communication device processing the sounding frame;
an average SNR of a space time stream (STS) by which the sounding frame transmitted from the second wireless communication device; and
an average SNR corresponding to a tone of the STS by which the sounding frame transmitted from the second wireless communication device; and
the second wireless communication device receiving the beamforming feedback frame from the first wireless communication device, determining a beamforming parameter based on the beamforming feedback frame, and transmitting a multi-user packet to the first wireless communication device based on the beamforming parameter.
14. The method of claim 13 , wherein the beamforming feedback frame type corresponding to a channel/state information (CSI) report, a compressed beamforming report, or a non-compressed beamforming report.
15. The method of claim 13 , wherein the multi-user packet being a multiple input multiple output (MU-MIMO) packet.
16. The method of claim 13 , wherein the multi-user packet being an orthogonal frequency division multiple access (OFDMA) packet.
17. The method of claim 13 , wherein the correspondence between the first one or more clusters and the one or more antennae being reported within the beamforming feedback frame indicating which of the first or second one or more clusters being employed on which of the one or more antennae for transmitting the beamforming feedback frame to the second wireless communication device.
18. The method of claim 13 , further comprising:
the first wireless communication device includes a wireless station (STA); and
the second wireless communication device includes an access point (AP).
19. An apparatus comprising:
a plurality of antennae, wherein a first one or more antennae of the plurality of antennae to receive a sounding frame transmitted from a wireless communication device via a communication channel using a first one or more clusters; and
a baseband processing module to:
process the sounding frame to determine a beamforming feedback frame type;
generate a beamforming feedback frame having the determined beamforming feedback frame type, indicating the apparatus, and indicating characteristics of the communication channel corresponding to:
a second one or more clusters being reported within the beamforming feedback frame; and
a correspondence between the second one or more clusters and a second one or more antennae of the plurality of antennae being reported within the beamforming feedback frame, such that each of the first one or more clusters and the second one or more clusters being a respective mapping of orthogonal frequency division multiplexing (OFDM) tones within a corresponding at least one channel among a corresponding at least one frequency band; and wherein the wireless communication device configured to receive the beamforming feedback frame from the first wireless communication device, determine a beamforming parameter based on the beamforming feedback frame, and transmit a multi-user packet to the first wireless communication device based on the beamforming parameter.
20. The apparatus of claim 19 , wherein the beamforming feedback frame type corresponding to a channel/state information (CSI) report, a compressed beamforming report, or a non-compressed beamforming report.
21. The apparatus of claim 19 , wherein the first one or more antennae to transmit the beamforming feedback frame to the wireless communication device.
22. The apparatus of claim 19 , wherein the multi-user packet being a multiple input multiple output (MU-MIMO) packet.
23. The apparatus of claim 19 , wherein the multi-user packet being an orthogonal frequency division multiple access (OFDMA) packet.
24. The apparatus of claim 19 , wherein the first one or more antennae being the second one or more antennae.
25. The apparatus of claim 19 , wherein the first one or more clusters being the second one or more clusters.
26. The apparatus of claim 19 , wherein the characteristics of the communication channel corresponding to at least one of:
an average signal to noise ratio (SNR) within a receive chain of the first wireless communication device processing the sounding frame;
an average SNR corresponding to a tone within the receive chain of the first wireless communication device processing the sounding frame;
an average SNR of a space time stream (STS) by which the sounding frame transmitted from the second wireless communication device; and
an average SNR corresponding to a tone of the STS by which the sounding frame transmitted from the second wireless communication device.
27. The apparatus of claim 19 , wherein the correspondence between the second one or more clusters and the second one or more antennae of the plurality of antennae being reported within the beamforming feedback frame indicating which of being employed on which of the plurality of antennae for transmitting the beamforming feedback frame to the second wireless communication device.
28. The apparatus of claim 19 , further comprising:
the apparatus includes a wireless station (STA); and
the wireless communication device includes an access point (AP).