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US 10,855,428 B2Granted
Reducing channel sounding overhead using uplink OFDMA transmissions
AssigneeCisco Technology, Inc.
InventorsManoj Gupta, Gautam Dilip Bhanage, Brian Donald Hart, David Stuart Kloper
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Abstract
In one embodiment, a method is performed. An access point (AP) device may communicate signaling relating to a client device allocation for a location-related measurement. The AP device may transmit a trigger frame. The AP device may receive a response to the trigger frame from a client device. The response may include an uplink orthogonal frequency division multiple access (OFDMA) transmission. A location-related measurement of the client device may be determined based on the response to the trigger frame.
Claims18
A method comprising:
- communicating, at an access point (AP) device, signaling relating to a client device allocation for a location-related measurement;
- transmitting a first trigger frame;
- receiving a response to the first trigger frame from a client device, the response comprising an uplink orthogonal frequency division multiple access (OFDMA) transmission;
- determining a location-related measurement of the client device based on the response to the first trigger frame;
- identifying that the location-related measurement of the client device is not determined with at least a threshold level of precision based on the response to the first trigger frame, and in response:
- sending a second trigger frame to the client device, the second trigger frame having a different subcarrier allocation in a frequency channel than the first trigger frame;
- receiving a response to the second trigger frame from the client device;
- and
- determining the location-related measurement of the client device based on the response to the second trigger frame.
6 more elements
An access point (AP) device comprising:
- a network interface in communication with a network;
- a processor configured to execute computer readable instructions included on a non transitory memory;
- and
- a non-transitory memory including processor-readable instructions, that when executed by the processor, cause the AP device to:
- communicate signaling relating to a first client device allocation for a location-related measurement;
- transmit a first trigger frame;
- receive a response to first the trigger frame from a first client device, the response comprising an uplink orthogonal frequency division multiple access (OFDMA) transmission;
- determine a location-related measurement of the first client device based on the response to the first trigger frame;
- transmit a second trigger frame for a second client device;
- identify that the second client device does not respond to the second trigger frame, and in response:
- send a single user (SU) transmission to the second client device;
- receive a response to the SU transmission from the second client device;
- and
- determine the location-related measurement of the second client device based on the response to the SU transmission.
11 more elements
A method comprising:
- receiving, at a first access point (AP) device, a signal from a second AP device, the signal relating to a client device allocation for a location-related measurement;
- receiving from a client device a response to a first trigger frame, the response comprising an uplink orthogonal frequency division multiple access (OFDMA) transmission;
- determining a location-related measurement of the client device based on the response to the first trigger frame;
- identifying that the location-related measurement of the client device is not determined with at least a threshold level of precision based on the response to the first trigger frame, and in response:
- sending a second trigger frame to the client device, the second trigger frame having a different subcarrier allocation in a frequency channel than the first trigger frame;
- receiving a response to the second trigger frame from the client device;
- and
- determining the location-related measurement of the client device based on the response to the second trigger frame.
5 more elements
Dependencies are inferred from the claim text.