SYSTEM AND METHOD FOR EXPLICIT CHANNEL SOUNDING BETWEEN ACCESS POINTS
First Claim
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1. An access point (AP) configured to exchange messages with at least one associated station (STA) via a wireless channel, the AP comprising:
- a plurality of antennas;
radio circuitry configured to transmit and receive signals via said antennas; and
a baseband processor;
wherein the baseband processor is configured to monitor signals received by the radio circuitry from said at least one associated STA and at least one co-channel AP and to send a single sounding message to both of said at least one associated STA and said at least one co-channel AP together via the radio circuitry as part of a sounding sequence implemented by the baseband processor.
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Abstract
An access point (AP) and a method implemented in an AP for 802.11 AP to AP explicit channel state information (CSI) sounding so that inter AP interference can be reduced and multiple APs transmissions that can occur simultaneously on the same radio channel. An AP may be configured to monitor signals received by its radio circuitry from at least one associated STA and at least one co-channel AP and to send a message to said at least one associated STA and said at least one co-channel AP via the radio circuitry as part of a sounding sequence implemented by the baseband processor.
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Citations
21 Claims
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1. An access point (AP) configured to exchange messages with at least one associated station (STA) via a wireless channel, the AP comprising:
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a plurality of antennas; radio circuitry configured to transmit and receive signals via said antennas; and a baseband processor; wherein the baseband processor is configured to monitor signals received by the radio circuitry from said at least one associated STA and at least one co-channel AP and to send a single sounding message to both of said at least one associated STA and said at least one co-channel AP together via the radio circuitry as part of a sounding sequence implemented by the baseband processor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method implemented in an access point (AP) configured to exchange messages with at least one associated station (STA) via a wireless channel, the AP comprising:
- a plurality of antennas, radio circuitry configured to transmit and receive via said antennas, and a baseband processor, the method comprising;
monitoring signals received by the radio circuitry from said at least one associated STA and at least one co-channel AP; sending a single sounding message to both of said at least one associated STA and said at least one co-channel AP together via the radio circuitry as part of a sounding sequence implemented by the baseband processor; and receiving channel state information (CSI) from said at least one co-channel AP in response to said message. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- a plurality of antennas, radio circuitry configured to transmit and receive via said antennas, and a baseband processor, the method comprising;
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19. An access point (AP) configured to exchange messages with at least one associated station (STA) via a wireless channel, the AP comprising:
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a plurality of antennas; radio circuitry configured to transmit and receive via said antennas and a baseband processor, wherein the baseband processor is configured to transmit identification of capability of the AP to respond to sounding packets in a beacon frame of the AP, and to detect a sounding packet addressed to it sent by a co-channel AP over the wireless channel, and to send channel state information (CSI) to said at least one co-channel AP via the wireless channel.
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20. (canceled)
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21. (canceled)
Specification