System and method of positioning of a target node in side-link communication system

Patent metadata

Field	Value
Publication number	US-12501391-B2
Application number	US-202318181650-A
Country	US
Kind code	B2
Filing date	Mar 10, 2023
Priority date	Mar 10, 2022
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A method of positioning a target node ( 204 - 5 ) in a side-link communication system in a wireless communication network ( 200 ) is described. The method comprises establishing a communication link with the target node ( 204 - 5 ), and a second node ( 204 - 3 ), for positioning the target node ( 204 - 5 ). The first node ( 204 - 1 ) transmits a capability request message to the target node ( 204 - 5 ) and the second node ( 204 - 3 ) and receives a feedback message comprising a capability reply message and an acceptance message. The first node ( 204 - 1 ) configures the second node ( 204 - 3 ) for transmitting and receiving a Positioning Reference Signal (PRS) to or from the target node ( 204 - 5 ), based on the feedback message. The PRS is utilized for determining position measurement of the target node ( 204 - 5 ). The first node ( 204 - 1 ) receives data related to the position measurement and estimated position of the target node ( 204 - 5 ), from the target node ( 204 - 5 ) and the second node ( 204 - 3 ).

First claim

We claim:

1 . A method of positioning a target node in a side-link communication system, the method comprising:
establishing, by at least one first node ( 204 - 1 ), a communication link with at least one target node ( 204 - 5 ), and at least one second node ( 204 - 3 ), for positioning the at least one target node ( 204 - 5 ); transmitting, by the at least one first node ( 204 - 1 ), a capability request message to at least one of the at least one target node ( 204 - 5 ) and the at least one second node ( 204 - 3 ); receiving, by the at least one first node ( 204 - 1 ), a feedback message from the at least one target node ( 204 - 5 ) and the at least one second node ( 204 - 3 ), wherein the feedback message comprises at least one of a capability reply message and an acceptance message; configuring, by the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) to one of transmit at least one Positioning Reference Signal (PRS) to the at least one target node ( 204 - 5 ) and receive the at least one PRS from the at least one target node ( 204 - 5 ), based on the feedback message, wherein the at least one PRS is utilized for determining a data related to at least one of position measurement and estimated positioning of the at least one target node ( 204 - 5 ); and receiving, by the at least one first node ( 204 - 1 ), a data related to at least one of a position measurement and estimated position of the at least one target node ( 204 - 5 ) used to estimate a position information, from at least one of the at least one target node ( 204 - 5 ) and the at least one second node ( 204 - 3 ),
wherein the position information is at least one of the relative position, absolute position, directional ranging, and distance ranging of the at least one target node ( 204 - 5 ), wherein the relative position of the at least one target node ( 204 - 5 ) is estimated with respect to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and node containing the sidelink positioning server,
wherein the absolute position of the at least one target node ( 204 - 5 ) is estimated with respect to one of global coordinate system (GCS) and a local coordinate system (LCS) configured to the at least one target node ( 204 - 5 ),
wherein the direction ranging is the direction of the at least one target node ( 204 - 5 ) with respective to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and a node containing the sidelink positioning server;

wherein the distance ranging is the distance of the at least one target node ( 204 - 5 ) with respective to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and the node containing the sidelink positioning server;
wherein the position information is at least one of the relative position, absolute position, directional ranging, and distance ranging of the at least one target node ( 204 - 5 );
wherein the relative position of the at least one target node ( 204 - 5 ) is estimated with respect to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and node containing the sidelink positioning server;

wherein the absolute position of the at least one target node ( 204 - 5 ) is estimated with respect to one of global coordinate system (GCS) and a local coordinate system (LCS) configured to the at least one target node ( 204 - 5 );
wherein the direction ranging is the direction of the at least one target node ( 204 - 5 ) with respective to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and a node containing the sidelink positioning server; and
wherein the distance ranging is the distance of the at least one target node ( 204 - 5 ) with respective to one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and the node containing the sidelink positioning server.

2 . The method as claimed in claim 1 , wherein prior to establishing the communication link by the at least one first node ( 204 - 1 ), the method further comprises:
receiving, by the at least one first node ( 204 - 1 ), a request from one of the at least one second node ( 204 - 3 ), the at least one target node ( 204 - 5 ), a Location Request Control Unit (LRCU), external application connected to the at least one first node ( 204 - 1 ), a sidelink positioning server and a Location Management Function (LMF), for establishing the communication link.

3 . The method as claimed in claim 2 , wherein the sidelink positioning server performs a subset of the functionalities of the LMF.

4 . The method as claimed in claim 1 , further comprising:
estimating, by the at least one first node ( 204 - 1 ), the position information of the at least one target node ( 204 - 5 ) based on the data related to the position measurement; and transmitting, by the at least one first node ( 204 - 1 ), the position information of the at least one target node ( 204 - 5 ) to at least one of the LRCU, the LMF, the at least one target node ( 204 - 5 ), and the at least one second node ( 204 - 3 ).

5 . The method as claimed in claim 1 , wherein receiving by at least one first node ( 204 - 1 ), the data related to estimated position of the at least one target node ( 204 - 5 ) further comprises:
transferring, by the at least one first node ( 204 - 1 ), the estimated position of the at least one target node ( 204 - 5 ) to a LMF via an Access and Mobility Management Function (AMF).

6 . The method as claimed in claim 1 , further comprising:
transferring, by the at least one first node ( 204 - 1 ), the data related to the position measurement of the at least one target node ( 204 - 5 ) to a LMF; and estimating, by the LMF, the position information of the at least one target node ( 204 - 5 ).

7 . The method as claimed in claim 1 , further comprising:
transferring, by the at least one first node ( 204 - 1 ), the estimated position to a sidelink positioning server via the LRCU when the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ) and the at least one target node ( 204 - 5 ) are not connected to at least one base station (BS).

8 . The method as claimed in claim 2 , wherein at least one of the at least one first node ( 204 - 1 ), the at least one second node ( 204 - 3 ), and the at least one target node ( 204 - 5 ) performs the functionality of sidelink positioning server and the LRCU.

9 . The method as claimed in claim 1 , wherein the capability reply message comprises at least one of message segmentation capability, PRS processing capability, maximum frequency layer supported, side-link band combination supported, supported bandwidth, supported Sub-Carrier Spacing (SCS), PRS processing duration, maximum PRS configuration can be handled, FR1/FR2 support, PRS buffer types, a list of the at least one second node, and Quasi Co Location (QCL) capabilities.

10 . The method as claimed in claim 1 , wherein receiving, by the at least one first node ( 204 - 1 ), the feedback message from the at least one second node ( 204 - 3 ) further comprises:
deciding by the at least one first node and the at least one second node for the position measurement of the at least one target node ( 204 - 5 ), and wherein the feedback message further comprises at least one of overlapping positioning capabilities, link quality, signal strength, relative or absolute location of the node, battery life of node, node type, node power class, and node security criteria, and PC5 capability.

11 . The method as claimed in claim 10 , wherein the at least one second node ( 204 - 3 ) is decided from a list of assi

Assignees

• Centre Of Excellence In Wireless Tech
• Indian Inst Tech Madras
• Centre Of Excellentce In Wireless Tech
• Indian Institute Of Tech Madras

Inventors

• Masal Abhijeet Abhimanyu
• Devarakonda Pavan Kalyan
• Singh Vikram
• Milleth Jeniston Deviraj Klutto
• Ramamurthi Bhaskar

Classifications

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04W92/18

  between terminal devices · CPC title

• H04W64/00 Primary

  Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management · CPC title