RELATIVE TIMING DRIFT CORRECTION FOR DISTRIBUTED MULTI-USER TRANSMISSIONS
First Claim
1. A method for wireless communication at a first access point (AP), comprising:
- receiving, from a second AP, a first signal associated with a channel sounding procedure to be performed simultaneously by the second AP and the first AP;
receiving, from the second AP and prior to a substantially simultaneous transmission by the second AP and the first AP, a second signal comprising timing information relative to the first signal;
determining a start time of the substantially simultaneous transmission at the first AP based at least in part on the timing information; and
initiating the substantially simultaneous transmission according to the determined start time.
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Accused Products
Abstract
This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.
19 Citations
50 Claims
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1. A method for wireless communication at a first access point (AP), comprising:
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receiving, from a second AP, a first signal associated with a channel sounding procedure to be performed simultaneously by the second AP and the first AP; receiving, from the second AP and prior to a substantially simultaneous transmission by the second AP and the first AP, a second signal comprising timing information relative to the first signal; determining a start time of the substantially simultaneous transmission at the first AP based at least in part on the timing information; and initiating the substantially simultaneous transmission according to the determined start time. - View Dependent Claims (2, 3)
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4-12. -12. (canceled)
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13. A method for wireless communication, comprising:
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transmitting, to a first access point (AP), a first signal associated with a channel sounding procedure; transmitting, to the first AP, a second signal comprising timing information relative to the first signal, wherein a start time of a substantially simultaneous transmission at the first AP is determined based at least in part on the timing information; and performing, in conjunction with the first AP, the substantially simultaneous transmission, wherein the substantially simultaneous transmission at the first AP is performed according to the determined start time. - View Dependent Claims (14, 15)
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16-24. -24. (canceled)
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25. An apparatus for wireless communication at a first access point (AP), comprising:
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a first interface; a second interface; and a wireless modem configured to; obtain via the first interface a first signal associated with a channel sounding procedure to be performed substantially simultaneously by a second AP and the first AP received from the second AP; obtain via the first interface a second signal comprising timing information relative to the first signal from the second AP and prior to a substantially simultaneous transmission by the second AP and the first AP; determine a start time of the substantially simultaneous transmission at the first AP based at least in part on the timing information; and output the substantially simultaneous transmission via the second interface for transmission according to the determined start time. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An apparatus for wireless communication, comprising:
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a first interface; a second interface; and a wireless modem configured to; output a first signal associated with a channel sounding procedure via the second interface for transmission to a first access point (AP); output a second signal comprising timing information relative to the first signal, wherein a start time of a substantially simultaneous transmission at the first AP is determined based at least in part on the timing information, via the second interface for transmission to the first AP; and output, in conjunction with the first AP, the substantially simultaneous transmission via the second interface for transmission, wherein the substantially simultaneous transmission at the first AP is outputted according to the determined start time. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. (canceled)
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50. (canceled)
Specification