Uplink UE positioning

Patent metadata

Field	Value
Publication number	US-12464490-B2
Application number	US-202218065767-A
Country	US
Kind code	B2
Filing date	Dec 14, 2022
Priority date	Jun 17, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A method for operating a wireless communication network that supports a plurality of reference signals such as sounding reference signals as provided. The method comprises analyzing a channel condition between a UE and TRPs, providing a measurement report to the wireless communication network and determining parameters of an uplink RS based on the measurement report. The method further comprises receiving, with the user equipment, at least one instruction signal comprising information indicating the determined parameters of the uplink RS, and transmitting the uplink RS within the UE so as to allow determining uplink transmission links for a UE multi-TRP communication or a position of the UE in the wireless communication network based on an evaluation of transmittal of the instructed uplink RS.

First claim

The invention claimed is:

1 . A method for operating a wireless communication network that supports a plurality of reference signals (RS), the method comprising:
receiving, with a user equipment (UE), a first set of beamformed signals comprising at least one beamforming signal from a first transmission and reception point (TRP) using at least a first spatial reception filter; and at least a second set of beamformed signals comprising at least one beamformed signal from a second TRP using at least a second spatial reception filter; analyzing a first channel condition between the first TRP and the UE and a second channel condition between the second TRP and the UE; providing a measurement report indicating the first channel condition and the second channel condition; and reporting the measurement report to the wireless communication network such that the measurement report comprises a filter information indicating the first spatial reception filter and the second spatial reception filter; determining, based on the measurement report, parameters of an uplink RS, the parameters comprising at least a characteristic of the uplink RS and a spatial information of the uplink RS; wherein the uplink RS is adapted based on a channel condition between the UE and at least the first TRP and the second TRP; receiving, with the UE, at least one instruction signal comprising information indicating the parameters of the uplink RS; transmitting the uplink RS with the UE; receiving the uplink RS with the first TRP and evaluating reception of the first TRP to acquire a first evaluation result and receiving the uplink RS with the second TRP and evaluating reception of the second TRP to acquire a second evaluation result; and determining uplink transmission links for a UE multi-TRP communication or estimating, for a positioning procedure in the wireless communication network, a position of the UE in the wireless communication network based on the first evaluation result and the second evaluation result.

2 . The method of claim 1 , further comprising:
wherein analyzing the first channel condition and the second channel condition comprises selecting a first spatial filter characteristic matching the first set of beamformed signals and selecting a second spatial filter characteristic matching the second set of beamformed signals; such that the filter information indicates the first spatial filter characteristic and the second spatial filter characteristic.

3 . The method of claim 1 , wherein determining the parameters of the uplink RS comprises deriving information indicating a derived spatial filter being associated with the spatial information of the uplink RS.

4 . The method of claim 1 , wherein at least one parameter of the uplink RS is indicated in the instruction signal so as to define at least a part of a value interval; wherein the UE selects a value of the parameter within the value interval.

5 . The method of claim 1 , wherein, for determining the uplink transmission links or the position of the UE, the uplink RS transmitted by the UE is received with a plurality of TRP, the method comprising evaluating reception of the uplink RS at the plurality of TRP and determining the uplink transmission links or the position of the UE based on the evaluated receptions.

6 . The method of claim 1 , wherein, for transmitting the uplink RS, the UE tries to determine a pathloss RS or a spatial relation in the wireless communication network; wherein in a case where the determination is unsuccessful, the UE uses at least one of a default spatial relationship; a RS being tuned to a selected TRP and a pathloss reference being tuned to the selected TRP;
wherein the UE signals, to the wireless communication network, the use of the default spatial relationship; the RS being tuned to the selected TRP, and/or the pathloss reference being tuned to the selected TRP.

7 . The method of claim 1 , wherein the parameters of the uplink RS are determined based on the measurement report received from the UE that indicates a performance of a spatial reception filter characteristic for receiving a DL RS transmitted by the wireless communication network; wherein for each of a plurality of DL RS at least one RX beam is formed with the UE, wherein the measurement report is provided so as to indicate at least one of the formed RX beams.

8 . The method of claim 1 , wherein the UE determines a determined spatial relationship in the wireless communication network based on a ToA of DL RS jointly with a received signal reference power (RSRP) of the DL RS.

9 . The method of claim 1 , wherein the parameters of the uplink RS are determined based on the measurement report received from the UE that indicates a performance of a spatial reception filter characteristic; wherein the measurement report is generated for all links between the UE and a TRP that comprise a channel quality of at least a threshold value.

10 . The method claim 1 , further comprising:
providing support information comprising assistance data or measurement configuration and system information to the UE, the support information comprising information related to a RS supported in the wireless communication network; transmitting the RS; and receiving the RS with the UE; in which the UE reports an RSRP difference only; and providing the measurement report with the UE, the measurement report indicating a channel condition between the UE and at least one TRP determined by the UE.

11 . The method claim 1 , comprising:
providing the UE with information indicating a subset of a set of spatial filters supported by the UE, transmitting a set of DL RS with at least one TRP; determining a channel condition between the at least one TRP and the UE by using only the subset of spatial filters at the UE; and reporting a reception quality to the wireless communication network.

12 . The method claim 1 , comprising:
selecting at the UE a subset of a set of spatial filters supported by the UE, the subset related to a TRP; and transmitting a set of DL RS with at least one TRP; determining a channel condition between the at least one TRP and the UE by using only the subset of spatial filters at the UE; and reporting a reception quality to the wireless communication network.

13 . The method of claim 1 , wherein the parameters of the uplink RS are determined based on the measurement report provided by the UE, the measurement report being:
a full report indicating all configured DL RS on all available UE spatial filter configurations; a part of the full report being selected based on supporting information provided by the wireless communication network so as to select the part of the full report of selected RS signals transmitted by at least one TRP; a part of the full report being selected so as to comprise information related to links subject of oversaturation; and/or a part of the full report being selected based on a determined good combination of DL RS signals and UE spatial filters.

14 . The method of claim 1 , wherein the position of the UE is determined repeatedly based on adjusting an allocation based on measurements at the TRPs or by requesting new measurements from the UE.

15 . The method of claim 1 , wherein the parameters of the uplink RS are determined based on the measurement report provided by the UE, the measurement report being received using a wireless signal of the wireless communication network or using a sidelink.

16 . A method for operating a wireless communication network that supports a plurality of reference signals, the method compris

Assignees

• Fraunhofer Ges Forschung

Inventors

• Ghimire Birendra
• Alawieh Mohammad
• Eberlein Ernst
• Franke Norbert
• Momani Mohammad

Classifications

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• G01S5/0205

  Details · CPC title

• G01S5/0036

  of measured values, i.e. measurement on mobile and position calculation on base station · CPC title