IP Library › Granted Patent US 12701538
Granted Patent B2
US 12701538 · App. 17/819,589 · Granted Aug 4, 2026

LOS probability map signaling

Inventors: Roohollah Amiri (San Diego, CA); Srinivas Yerramalli (San Diego, CA); Taesang Yoo (San Diego, CA); Marwen Zorgui (San Diego, CA); Mohammad Tarek Fahim (San Diego, CA); Mohammed Ali Mohammed Hirzallah (San Diego, CA); Rajat Prakash (San Diego, CA); Xiaoxia Zhang (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04W64/003G01S19/48
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Quick Facts
Patent No.
US 12701538
App. No.
17/819,589
Granted
Aug 4, 2026
Kind
B2
Abstract

Techniques for line-of-sight (LOS) probability map signaling are disclosed. The techniques can include receiving a positioning signal via a wireless link between the UE and a transmission/reception point (TRP) of a radio access network (RAN), identifying an LOS probability function associated with the wireless link based on LOS probability map information provided by a location management function (LMF) of a core network for the RAN, and generating an LOS probability estimate for the wireless link using the LOS probability function.

Claims (43)

1 . A method for wireless communication by a user equipment (UE), the method comprising:

receiving a positioning signal via a wireless link between the UE and a transmission/reception point (TRP) of a radio access network (RAN);

identifying a line-of-sight (LOS) probability function associated with the wireless link based on LOS probability map information provided by a location management function (LMF) of a core network for the RAN, wherein the LOS probability map information indicates coordinates defining a boundary of a LOS probability map region and parameters defining the LOS probability function for the LOS probability map region; and

generating an LOS probability estimate for the wireless link using the LOS probability function, wherein the LOS probability function outputs the LOS probability estimate for the wireless link based on input comprising a given set of coordinates within the LOS probability map region.

2 . The method of claim 1 , wherein the LOS probability function corresponds to the LOS probability map region associated with the wireless link, wherein the coordinates defining the boundary of the LOS probability map region are vertex coordinates.

3 . The method of claim 1 , comprising obtaining the LOS probability map information from a received non-access stratum (NAS) message.

4 . The method of claim 1 , comprising obtaining the LOS probability map information from a received radio resource control (RRC) message.

5 . The method of claim 1 , comprising obtaining the LOS probability map information from a received medium access control (MAC) control element (CE).

6 . The method of claim 1 , comprising identifying the LOS probability function from among multiple LOS probability functions associated with the wireless link, wherein each of the multiple LOS probability functions corresponds to a respective one of multiple LOS probability map regions associated with the wireless link.

7 . The method of claim 6 , comprising:

determining a location estimate for the UE;

identifying an LOS probability map region from among the multiple LOS probability map regions based on the location estimate; and

identifying as the LOS probability function a one of the multiple LOS probability functions that corresponds to the identified LOS probability map region.

8 . The method of claim 6 , comprising:

determining a location estimate for the UE;

identifying two or more LOS probability map regions from among the multiple LOS probability map regions based on the location estimate;

identifying two or more LOS probability functions comprising a corresponding LOS probability function for each of the two or more LOS probability map regions; and

generating the LOS probability estimate using the two or more LOS probability functions.

9 . The method of claim 1 , comprising determining a position of the UE based on the LOS probability estimate.

10 . The method of claim 1 , comprising reporting the LOS probability estimate to the LMF.

11 . A user equipment (UE), comprising:

a transceiver;

a memory; and

one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:

receive a positioning signal via a wireless link between the UE and a transmission/reception point (TRP) of a radio access network (RAN);

identify a line-of-sight (LOS) probability function associated with the wireless link based on LOS probability map information provided by a location management function (LMF) of a core network for the RAN, wherein the LOS probability map information indicates coordinates defining a boundary of a LOS probability map region and parameters defining the LOS probability function for the LOS probability map region; and

generate an LOS probability estimate for the wireless link using the LOS probability function, wherein the LOS probability function outputs the LOS probability estimate for the wireless link based on input comprising a given set of coordinates within the LOS probability map region.

12 . The UE of claim 11 , wherein the LOS probability function corresponds to the LOS probability map region associated with the wireless link, wherein the coordinates defining the boundary of the LOS probability map region are vertex coordinates.

13 . The UE of claim 11 , wherein the one or more processors are configured to obtain the LOS probability map information from a received non-access stratum (NAS) message.

14 . The UE of claim 11 , wherein the one or more processors are configured to obtain the LOS probability map information from a received radio resource control (RRC) message.

15 . The UE of claim 11 , wherein the one or more processors are configured to obtain the LOS probability map information from a received medium access control (MAC) control element (CE).

16 . The UE of claim 11 , wherein the one or more processors are configured to identify the LOS probability function from among multiple LOS probability functions associated with the wireless link, wherein each of the multiple LOS probability functions corresponds to a respective one of multiple LOS probability map regions associated with the wireless link.

17 . The UE of claim 16 , wherein the one or more processors are configured to:

determine a location estimate for the UE;

identify an LOS probability map region from among the multiple LOS probability map regions based on the location estimate; and

identify as the LOS probability function a one of the multiple LOS probability functions that corresponds to the identified LOS probability map region.

18 . The UE of claim 16 , wherein the one or more processors are configured to:

determine a location estimate for the UE;

identify two or more LOS probability map regions from among the multiple LOS probability map regions based on the location estimate;

identify two or more LOS probability functions comprising a corresponding LOS probability function for each of the two or more LOS probability map regions; and

generate the LOS probability estimate using the two or more LOS probability functions.

19 . The UE of claim 11 , wherein the one or more processors are configured to determine a position of the UE based on the LOS probability estimate.

20 . The UE of claim 11 , wherein the one or more processors are configured to report the LOS probability estimate to the LMF.