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US-20260126522-A1 - RADAR CROSS SECTION (RCS) RELATION INFORMATION

US20260126522A1US 20260126522 A1US20260126522 A1US 20260126522A1US-20260126522-A1

Abstract

In some aspects, a method of wireless sensing performed by a sensing node includes receiving first radar cross section (RCS) information for a first sensing target; receiving RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target; determining the second RCS information based on the first RCS information and the RCS relation information; and measuring one or more target attributes of the second sensing target based at least in part on the second RCS information.

Inventors

  • Mohammed Ali Mohammed Hirzallah
  • Marwen Zorgui
  • Srinivas Yerramalli

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260507
Application Date
20241107

Claims (20)

  1. 1 . A sensing node, 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, first radar cross section (RCS) information for a first sensing target; receive, via the one or more transceivers, RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target; determine the second RCS information based on the first RCS information and the RCS relation information; and measure one or more target attributes of the second sensing target based at least in part on the second RCS information.
  2. 2 . The sensing node of claim 1 , wherein: the one or more target attributes, the second RCS information, or both are transmitted to a sensing entity, the first RCS information is received from the sensing entity, or the RCS relation information is received from the sensing entity.
  3. 3 . The sensing node of claim 1 , wherein the one or more target attributes comprise: a distance between the sensing node and the second sensing target, an angle of arrival between the second sensing target and the sensing node, an angle of departure between the second sensing target and the sensing node, a velocity of the second sensing target, a presence of the second sensing target, or any combination thereof.
  4. 4 . The sensing node of claim 1 , wherein the first RCS information, the RCS relation information, or both are received via: one or more system information blocks (SIBs), one or more sensing assistance data messages, one or more request sensing information messages, or any combination thereof.
  5. 5 . The sensing node of claim 1 , wherein the one or more processors, either alone or in combination, are further configured to: transmit, via the one or more transceivers, to a sensing entity, a request for the first RCS information, the RCS relation information, or both.
  6. 6 . The sensing node of claim 5 , wherein the request further includes a type of the first RCS information requested by the sensing node.
  7. 7 . The sensing node of claim 1 , wherein the first RCS information comprises: a probability distribution of an RCS value of the first sensing target, a statistic of the RCS value, a range of the RCS value, a statistic of the RCS value at different polarizations, a statistic of the RCS value at the same polarization, a probability distribution of the RCS value at different polarizations, a probability distribution of the RCS value at the same polarization, or any combination thereof.
  8. 8 . The sensing node of claim 1 , wherein the RCS relation information comprises: an indication that there is no relation between an RCS value of the first sensing target and an RCS value of the second sensing target, an indication that there is a relation between the RCS value of the first sensing target and the RCS value of the second sensing target, an indication that a statistic of the RCS value of the first sensing target is greater than the statistic of the RCS value of the second sensing target, an indication that the statistic of the RCS value of the first sensing target is less than the statistic of the RCS value of the second sensing target, an indication that the statistic of the RCS value of the first sensing target is the same as the statistic of the RCS value of the second sensing target, an indication that the RCS value of the first sensing target and the RCS value of the second sensing target have the same probability distribution, an indication that a range of the RCS value of the second sensing target is smaller than a range of the RCS value of the first sensing target, an indication that the range of the RCS value of the second sensing target is larger than the range of the RCS value of the first sensing target, an indication that the RCS value of the first sensing target and the RCS value of the second sensing target have the same range, an indication that the RCS value of the first sensing target and the RCS value of the second sensing target have the same polarization ratio, or a combination thereof.
  9. 9 . The sensing node of claim 1 , wherein the RCS relation information comprises: an indication of a difference between an RCS value of the first sensing target and an RCS value of the second sensing target.
  10. 10 . The sensing node of claim 9 , wherein the indication of the difference comprises: a difference between a statistic of the RCS value of the first sensing target and the statistic of the RCS value of the second sensing target, a difference in parameters of a probability distribution of the RCS value of the first sensing target and a probability distribution of the RCS value of the second sensing target, or a combination thereof.
  11. 11 . The sensing node of claim 1 , wherein the one or more processors, either alone or in combination, are further configured to: transmit, via the one or more transceivers, based on the RCS relation information indicating that there is no relation between an RCS value of the first sensing target and an RCS value of the second sensing target, a request for the second RCS information; and receive, via the one or more transceivers, based on the request, the second RCS information.
  12. 12 . The sensing node of claim 1 , wherein the first RCS information is an index to a table of RCS profiles for different types of sensing targets.
  13. 13 . The sensing node of claim 12 , wherein the table of RCS profiles comprises: a plurality of types of sensing targets, and an RCS profile for each of the plurality of types of sensing targets.
  14. 14 . The sensing node of claim 12 , wherein the table of RCS profiles is received via: radio resource control (RRC) signaling, Long Term Evolution (LTE) positioning protocol (LPP) signaling, or a combination thereof.
  15. 15 . The sensing node of claim 1 , wherein the sensing node is: a user equipment (UE), a transmission-reception point (TRP), a base station, a central base station unit, a distributed base station unit, or a radio unit.
  16. 16 . A sensing entity, 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: transmit, via the one or more transceivers, to a sensing node, first radar cross section (RCS) information for a first sensing target; and transmit, via the one or more transceivers, to the sensing node, RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target.
  17. 17 . The sensing entity of claim 16 , wherein the one or more processors, either alone or in combination, are further configured to: receive, via the one or more transceivers, from the sensing node, the second RCS information, the one or more target attributes, or both.
  18. 18 . The sensing entity of claim 16 , wherein the one or more target attributes comprise: a distance between the sensing node and the second sensing target, an angle of arrival between the second sensing target and the sensing node, an angle of departure between the second sensing target and the sensing node, a velocity of the second sensing target, a presence of the second sensing target, or any combination thereof.
  19. 19 . The sensing entity of claim 16 , wherein the first RCS information, the RCS relation information, or both are transmitted via: one or more system information blocks (SIBs), one or more sensing assistance data messages, one or more request sensing information messages, or any combination thereof.
  20. 20 . The sensing entity of claim 16 , wherein the one or more processors, either alone or in combination, are further configured to: receive, via the one or more transceivers, from the sensing node, a request for the first RCS information, the RCS relation information, or both.

Description

TECHNICAL FIELD Aspects of the disclosure relate generally to wireless technologies. BACKGROUND Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G), a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks), a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long Term Evolution (LTE) or WiMax). There are presently many different types of wireless communication systems in use, including cellular and personal communications service (PCS) systems. Examples of known cellular systems include the cellular analog advanced mobile phone system (AMPS), and digital cellular systems based on code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), the Global System for Mobile communications (GSM), etc. A fifth generation (5G) wireless standard, referred to as New Radio (NR), enables higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements. The 5G standard, according to the Next Generation Mobile Networks Alliance, is designed to provide higher data rates as compared to previous standards, more accurate positioning (e.g., based on reference signals for positioning (RS-P), such as downlink, uplink, or sidelink positioning reference signals (PRS)), RF sensing, and other technical enhancements. These enhancements, as well as the use of higher frequency bands, enable improved RF sensing and 5G-based positioning. SUMMARY The following presents a simplified summary relating to one or more aspects disclosed herein. Thus, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be considered to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below. In an aspect, a method of wireless sensing performed by a sensing node includes receiving first radar cross section (RCS) information for a first sensing target; receiving RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target; determining the second RCS information based on the first RCS information and the RCS relation information; and measuring one or more target attributes of the second sensing target based at least in part on the second RCS information. In an aspect, a method of wireless sensing performed by a sensing entity includes transmitting, to a sensing node, first radar cross section (RCS) information for a first sensing target; and transmitting, to the sensing node, RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target. In an aspect, a sensing node includes 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, first radar cross section (RCS) information for a first sensing target; receive, via the one or more transceivers, RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target; determine the second RCS information based on the first RCS information and the RCS relation information; and measure one or more target attributes of the second sensing target based at least in part on the second RCS information. In an aspect, a sensing entity includes 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: transmit, via the one or more transceivers, to a sensing node, first radar cross section (RCS) information for a first sensing target; and transmit, via the one or more transceivers, to the sensing node, RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target. In an aspect, a sensing node includes means for receiving first radar cross section (RCS) information for a first sensing target; means for receiving RCS relation information indicating a relation between the first RCS information and second RCS information for a second sensing target; means for determining the second RCS information based on the first RCS information and the RCS relation information; and means