Method and devices for multiple station sounding in a wireless local area network
AssigneeIntel Corporation
InventorSolomon B. Trainin
Life of this patent
Estimating the term…
Abstract
Embodiments of a method and apparatus for obtaining sounding measurements between an access point and a wireless station within a wireless local area network are described. Some embodiments relate to Wi-Fi networks and networks operating in accordance with one of the IEEE 802.11 standards. Some embodiments may allow an access point to request that multiple stations compute sounding measurements with minimal time delay between measurements. Other embodiments may be described and claimed.
Claims23
-18. (canceled)
Wireless communications circuitry adapted for operation in a wireless station, the circuitry operable to:
- receive a Very High Throughput (VHT) null data packet (NDP) Announcement message received at the wireless station, the VHT NDP Announcement message including an identification for one or more wireless stations (STAs);
- receive a NDP message received at the wireless station;
- determine whether an identifier of the wireless station is indicated first in the identification for the one or more STAs included in the VHT NDP Announcement message;
- and
- responsive to determining that the identifier of the wireless station is listed first in the identification for the one or more STAs:
- calculate a VHT Compressed Beamforming feedback message based upon the NDP message;
- and
- cause transmission of the VHT Compressed Beamforming feedback message a short interframe space (SIFS) after receipt of the NDP message.
At least one non-transitory machine readable medium that stores instructions which when performed by a wireless communications circuitry of a wireless station, cause the wireless station to perform operations comprising:
- processing a Very High Throughput (VHT) null data packet (NDP) Announcement message, the VHT NDP Announcement message including a listing of one or more wireless stations (STAs);
- processing a NDP message;
- determining whether an identifier of the wireless station is first in the listing for the one or more STAs included in the VHT NDP Announcement message;
- and
- responsive to determining that the identifier of the wireless station is first in the listing of the one or more STAs:
- calculating a VHT Compressed Beamforming feedback message based upon the NDP message;
- and
- causing transmission of the VHT Compressed Beamforming feedback message a short interframe space (SIFS) after receipt of the NDP message.
At least one non-transitory machine readable medium that stores instructions which when performed by an Access Point (AP), cause the AP to perform operations comprising:
- transmitting a Very High Throughput (VHT) null data packet (NDP) Announcement message, the VHT NDP Announcement message including an identification of one or more wireless stations (STAs), the identification of the one or more STAs including identifiers for the one or more STAs which are to provide respective VHT Compressed Beamforming feedback messages in response to a NDP message;
- transmitting the NDP message for the one or more STAs;
- and
- receiving, at respective times, the respective VHT Compressed Beamforming feedback messages from the one or more of the STAs in response to the NDP message, wherein the VHT NDP Announcement message is used by at least one of the one or more STAs to determine a timing for transmitting a particular VHT Compressed Beamforming feedback message to the AP.
A wireless communications circuitry comprising:
- a processing circuit to:
- generate a Very High Throughput (VHT) null data packet (NDP) Announcement message;
- and
- generate a NDP message;
- wherein the VHT NDP Announcement Message includes an identification of one or more wireless stations (STAs), the identification of the one or more STAs including identifiers for the one or more STAs which are to provide respective VHT Compressed Beamforming feedback messages;
- and
- a transceiver circuit to:
- transmit the VHT NDP Announcement message;
- transmit the NDP message;
- and
- receive the respective VHT Compressed Beamforming feedback messages;
- wherein the VHT Compressed Beamforming feedback messages are received at respective times from the one or more of the STAs in response to the NDP message, wherein the VHT NDP Announcement message is used by at least one of the one or more STAs to determine a timing for transmission of a particular VHT Compressed Beamforming feedback message.
Dependencies are inferred from the claim text.