Deriving angle information in wireless networks covering near-field areas
Disclosed are techniques for wireless sensing. In an aspect, a transmitter device transmits, to at least one receiver device, one or more reference signals on each of a plurality of transmit beams, wherein the plurality of transmit beams corresponds to a plurality of codepoints of a near-field codebook, and wherein each of the plurality of codepoints is parameterized with an angle value and a range value of a corresponding transmit beam of the plurality of transmit beams.
1 . A method of wireless sensing performed by a transmitter device, comprising:
receiving a request from a sensing server to perform near-field sensing; and
transmitting, to at least one receiver device, in response to the request, one or more reference signals on each of a plurality of transmit beams, wherein the plurality of transmit beams corresponds to a plurality of codepoints of a near-field codebook, and wherein each of the plurality of codepoints is parameterized with an angle value and a range value of a corresponding transmit beam of the plurality of transmit beams.
2 . The method of claim 1 , further comprising:
receiving an indication from a sensing server to transmit the one or more reference signals on each of the plurality of transmit beams based on the near-field codebook.
3 . The method of claim 1 , wherein the plurality of codepoints is a plurality of steering vectors for the plurality of transmit beams.
4 . The method of claim 1 , wherein angle values and range values corresponding to the plurality of codepoints are sampled from an entire angular-distance domain.
5 . The method of claim 1 , further comprising:
receiving at least one measurement report from the at least one receiver device, the at least one measurement report including one or more beam indices and one or more signal strength measurements associated with the one or more beam indices.
6 . The method of claim 5 , further comprising:
determining at least one angle-of-departure (AoD) between the transmitter device and each of the at least one receiver device based on the at least one measurement report.
7 . The method of claim 6 , further comprising:
reporting the at least one AoD to a sensing server.
8 . The method of claim 1 , further comprising:
transmitting, to a sensing server, a capability message indicating that the transmitter device is capable of performing near-field sensing.
9 . The method of claim 8 , wherein the capability message identifies one or more zones in which the transmitter device is capable of performing the near-field sensing.
10 . The method of claim 1 , wherein the request identifies one or more zones in which the transmitter device is requested to perform the near-field sensing.
11 . The method of claim 1 , wherein the near-field codebook is configured to the transmitter device by a sensing server.
12 . The method of claim 1 , wherein:
the transmitter device is a base station, and
the receiver device is a user equipment (UE).
13 . The method of claim 1 , wherein:
the transmitter device is a UE, and
the receiver device is a base station.
14 . The method of claim 1 , wherein:
the transmitter device is a first UE, and
the receiver device is a second UE.
15 . A transmitter device, comprising:
one or more memories;
one or more transceivers; and
one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to:
receive, via the one or more transceivers, a request from a sensing server to perform near-field sensing; and
transmit, via the one or more transceivers, to at least one receiver device, in response to the request, one or more reference signals on each of a plurality of transmit beams, wherein the plurality of transmit beams corresponds to a plurality of codepoints of a near-field codebook, and wherein each of the plurality of codepoints is parameterized with an angle value and a range value of a corresponding transmit beam of the plurality of transmit beams.
16 . The transmitter device of claim 15 , wherein the plurality of codepoints is a plurality of steering vectors for the plurality of transmit beams.
17 . The transmitter device of claim 15 , wherein angle values and range values corresponding to the plurality of codepoints are sampled from an entire angular-distance domain.