Multi-beamformer sounding protocols for wlan systems
AssigneeInterDigital Patent Holdings, Inc.
InventorsZinan LIN, Hanqing LOU, Rui YANG, Mahmoud SAAD
Life of this patent
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Abstract
Methods are described for multi-beamformer sounding. A method may include a first access point (AP), which is a soliciting beamformer, transmitting a multibeamformer (MB) null data packet (NDP) announcement (NDPA) frame soliciting a second AP, which is a collaborating beamformer to transmit a second AP NDP; transmitting, by the first AP a first AP NDP; receiving by the first AP from a first station (STA) associated with the first AP a channel status information (CSI) report wherein the CSI report includes information on the first AP NDP and information on the second AP NDP.
Claims23
A method implemented in a first access point (AP), the method comprising:
- transmitting a multibeamformer (MB) null data packet (NDP) announcement (NDPA) frame soliciting a second AP to transmit a second AP NDP;
- transmitting, by the first AP, a first AP NDP;
- and
- receiving, from a first station (STA) associated with the first AP, a channel state information (CSI) report including CSI information based on the first AP NDP and the second AP NDP;
- wherein the NDPA frame includes a first user field that includes:
- a bandwidth subfield indicating a bandwidth of NDPs transmitted by the first AP and the second AP,
- a puncturing channel information subfield,
- a basic service set (BSS) color indication,
- a number of spatial streams for NDPs, or
- an information field indicating a starting spatial stream.
4-7. (canceled)
A first access point (AP) comprising:
- a processor and
- a transceiver,
- the processor configured to cause the transceiver to:
- transmit a multibeamformer (MB) null data packet (NDP) announcement (NDPA) frame soliciting a second AP to transmit a second AP NDP;
- transmit a first AP NDP;
- and
- receive, from a first station (STA) associated with the first AP, a channel state information (CSI) report including CSI information based on the first AP NDP and the second AP NDP;
- wherein the NDPA frame includes a first user field that includes:
- a bandwidth subfield indicating a bandwidth of NDPs transmitted by the first AP and the second AP,
- a puncturing channel information subfield,
- a basic service set (BSS) color indication, a number of spatial streams for the NDPs, or
- an information field indicating a starting spatial stream.
13-16. (canceled)
19-20. (canceled)
Dependencies are inferred from the claim text.