Multi-ap channel sounding procedures for wlan systems
AssigneeInterDigital Patent Holdings, Inc.
InventorsMahmoud SAAD, Zinan LIN, Hanqing LOU, Xiaofei WANG, Rui YANG
Life of this patent
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Abstract
A method performed by a station (STA) associated with a first access point (AP), wherein the first AP is part of a multi-AP (MAP) set comprising the first AP and at least a second AP, may compromise: receiving, from the second AP that the STA is not associated with, a null data packet announcement (NDPA) frame, the NDPA frame including a Special STA Info field including an association identifier (AID) relating to the association between the STA and the first AP; receiving a null data packet (NDP) frame from the second AP that the STA is not associated with; and transmitting, to the first AP, feedback based on the NDP frame.
Claims20
An access point (AP) comprising:
- a transmitter configured to transmit, to a station (STA), a null data packet announcement (NDPA) frame, the NDPA frame including a Partial BW Info field, wherein the Partial BW Info field indicates one or more requested subchannels;
- the transmitter further configured to transmit, to the STA, a null data packet (NDP) frame, the NDP frame including a universal signal (U-SIG) field, which includes a bandwidth (BW) field and a Puncturing Channel Information field;
- and
- a receiver configured to receive, from the STA, sounding feedback based on the NDP frame,
- wherein subchannels indicated by the BW field and the Puncturing Channel Information field are the same as the one or more requested subchannels indicated in the NDPA.
A method for use in an access point (AP), the method comprising:
- transmitting, to a station (STA), a null data packet announcement (NDPA) frame, the NDPA frame including a Partial BW Info field, wherein the Partial BW Info field indicates one or more requested subchannels;
- transmitting to the STA, a null data packet (NDP) frame, the NDP frame including a universal signal (U-SIG) field, which includes a bandwidth (BW) field and a Puncturing Channel Information field;
- and
- receiving, from the STA, sounding feedback based on the NDP frame,
- wherein subchannels indicated by the BW field and the Puncturing Channel Information field are the same as the one or more requested subchannels indicated in the NDPA.
A station (STA) comprising:
- a receiver configured to receive, from an access point (AP), a null data packet announcement (NDPA) frame including a Partial BW Info field that identifies one or more requested subchannels for sounding;
- and
- the receiver further configured to receive, from the AP, a null data packet (NDP) frame including a universal signal (U-SIG) field having a bandwidth (BW) field and a Puncturing Channel Information field,
- wherein the one or more requested subchannels identified by the Partial BW Info field correspond exactly to occupied subchannels indicated by the BW field and the Puncturing Channel Information field.
Dependencies are inferred from the claim text.