Positioning in WLAN systems
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMeng Wang, Soma Tayamon
Life of this patent
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Abstract
A method for enabling angle-based positioning of a wireless device in a Wireless Local Area Network, WLAN, system comprises the steps of extracting directional information from beamforming information comprised in channel sounding feedback obtained from a wireless device and estimating an angular direction to said wireless device based on said extracted directional information.
Claims20
A method for enabling angle-based positioning of a wireless device in a Wireless Local Area Network, WLAN, system, wherein the method comprises:
- initiating a channel sounding procedure for beamforming to the wireless device using rank-1 beamforming;
- extracting, responsive to initiating the channel sounding procedure, directional information from beamforming information comprised in the channel sounding feedback obtained from a wireless device;
- and
- estimating an angular direction to the wireless device based on the extracted directional information.
A device configured to enable angle-based positioning of wireless devices in a Wireless Local Area Network, WLAN, system, the device comprising:
- an antenna array for receiving channel sounding feedback from a wireless device of the wireless devices using rank-1 beamforming;
- and
- a processing circuit coupled to the antenna array configured to:
- extract directional information from beamforming information comprised in the channel sounding feedback;
- estimate an angular direction to the wireless device relative to the antenna array based on the extracted directional information;
- determine position information of the wireless device based on the estimated angular direction to the wireless device and location information of the antenna array;
- and
- transmit the position information to the wireless device.
A computer program comprising instructions, which when executed by at least one processor, cause the at least one processor to:
- initiate a channel sounding procedure for beamforming to a wireless device using rank-1 beamforming;
- extract, in response to initiating the channel sounding procedure, directional information from beamforming information comprised in the channel sounding feedback obtained from the wireless device;
- and
- estimate an angular direction to the wireless device based on the extracted directional information.
Dependencies are inferred from the claim text.