BEAM MANAGEMENT METHODS AND APPARATUSES FOR POSITIONING MEASUREMENTS IN A COMMUNICATIONS NETWORK

TECHNICAL FIELD

The present disclosure relates to the field of wireless communications, and in particular to beam management methods and apparatuses for downlink and uplink positioning measurements in a communications network.

BACKGROUND

Beamforming is a crucial part of the third Generation Partnership Project (3GPP) Release (Rel.) 15 which defines a New Radio (NR) access technology that enables a radio base station (also denoted herein gNB) and a User Equipment (UE) to establish and adapt communication links using spatially precoded pilot signals. The beam management framework for positioning purposes is disclosed for the DownLink (DL) and the UpLink (UL), followed by a description on the issues or drawbacks to be addressed, but first a general discussion on the status in the 5th 3GPP mobile network (5G)).

Currently, for the 5G mobile network, 3GPP discusses how to integrate new (Radio Access Technology) RAT-dependent measurement mechanisms and schemes in its new 5G air interface New Radio (NR) in order to support own 5G NR positioning solutions.

Existing positioning solutions for e.g. the 4G 3GPP mobile network, also known as Long Term Evolution (LTE) are the starting point of the discussion. LTE was using eCID (enhanced Cell ID) exploiting measurements that were existing for communications anywhere which may include: cell knowledge, signal strength (e.g. Reference Signal Received Power or RSRP), antenna sector information, etc. and downlink-based Observed Time Difference Of Arrival (OTDOA) and Uplink-Time Difference of Arrival (UTDOA)-based schemes.

For Time Difference Of Arrival (TDOA) schemes in general, reference signals are usually exploited. Examples of reference signals include: Positioning Reference Signals (PRS) in the downlink and Sounding Reference Signal (SRS) in the uplink. In LTE solutions, these reference signals were not used in a beamformed scenario. For 5G and the 5G air interface New Radio (NR), in principle all signals are transmitted within rather complex, but useful, beamforming schemes.

DL and UL positioning is based on measurements of TDOA received from a User Equipment (UE) with respect to pairs of cells/gNBs. By a cell or a gNB is meant a radio base station or a network node covering a cell. The Time Of Arrival (TOA) estimates of signals are based on measurements per cell on reference signals. Such reference signals may be either existing reference signals in NR (e.g., such as Channel State Information Reference Signals (CSI-RS) and/or SS/PBCH block in the DL and SRS in the UL) and/or new reference signals solely dedicated for positioning such as Positioning Reference Signal (PRS) (which are, as far as the inventors knowledge, not defined in the current 3GPP Release (Rel-15) specification). SS Block (SSB) stands for Synchronization Signal Block and in reality, it refers to a Synchronization/PBCH block because a Synchronization signal and a PBCH channel may be packed as a single block that always moves together. The components of this block are as follows:

- Synchronization Signal: PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal);

- PBCH: PBCH DMRS (DeModulation Reference Signal) and PBCH (Data)

In LTE, the transmission of PRS for OTDOA (and the reception of SRS for UTDOA) was defined in the 3GPP standard. In the case of PRS, these transmissions were broadcasted as“always-on” signals that were never intended for transmission in a beamformed fashion.

In other words, the problem of establishing UE specific beams originating from several locally distributed Transmission Points (TPs) in a coordinated fashion in order to support the joint task of 2-Dimensional/3-Dimensional (2D/3D)-positioning did not occur. A gNB may be viewed as a TP.

During the definition of NR Phase 1 (Rel. 15), beamforming schemes were mainly developed to pair single gNBs (or single TPs) with UEs. Now, at the beginning of the 3GPP Rel. 16, initial discussions on how to organize multipoint beamforming coordination just commenced. In Rel. 16, within the NR Positioning Study Items (PSI), discussions are planned to take place soon on how to embed TDOA schemes in the existing beamforming framework (that may be extended for this purpose) and there have not been prior discussions on that as far as the inventors are aware of.

SUMMARY

In order to move forward with RAT-dependent positioning solutions embedded in NR, the exemplary embodiments herein present and disclose at least potential schemes and scenarios on how to combine positioning reference signal transmission in both DL and UL directions including all details necessary to integrate with beam management and beamforming (including signaling).

It is thus an object of embodiments herein to provide beam management methods and apparatuses for positioning purposes or for positioning measurements in a communications mobile network that employs beamforming.

According to an aspect of embodiments herein, there is provided a beam management method performed by a (radio) network node (or s-gNB) or a Location Management Function (LMF) in a communication network comprising a target UE and at least one neighbouring network node, n-gNB, neighbouring said s-gNB. The method comprising: configuring the target UE with at least one reference signal (RS) resource setting containing a configuration of a number of resource sets, wherein each resource set contains at least one RS resource, associated with at least one neighbouring radio network node (n-gNB) or s-gNB, wherein each configuration contains information on a time and a frequency location behavior of said least received RS resource associated with said at least one n-gNB o s-gNB, and wherein each RS resource is transmitted from an associated n-gNB or s-gNB employing beamforming, and received by UE. An example of a RS resource may be a synchronization signal block (SSB) resource or a positioning reference signal (PRS) resource. The method further comprising: configuring the target UE with at least one Channel State Information (CSI) reporting setting to provide instructions to the target UE on when and how to report, on said configured RS resources associated with respective n-gNB; at least a measurement information beam report,; receiving at least one beam report from the target UE; exchanging said at least one beam report with at least one n-gNB (LMF). For example, in case the LMF is the coordinating node the LMF informs the gNB(s) with at least one resource configuration e.g. a PRS configuration.

The method further comprising configuring the target UE with at least one PRS resource set configuration; configuring at least one CSI reporting setting to provide instructions to the target UE on when to perform at least one beam measurement and at least one measurement on Time-Of-Arrival (TOA) parameter or Reference Signal Time Difference (RSTD) parameter or Round Trip Time (RTT) parameter of the configured PRS and/or SS/PBCH block resources and how to report these parameters; receiving, from the target UE, at least one measurement beam report including at least one value of each identified beam-ID along with an associated signal strength/quality indicator and one or several TOA or RSTD or RTT estimates associated with each received DL beam; and estimating the location of the target UE using at least the received measurement beam report received from the target UE.

According to another aspect of embodiments herein, there is also provided an apparatus in the form of a (radio) network node (or s-gNB) or LMF for beam management, the network node comprising a processor and a memory, said memory containing instructions executable by said processor whereby said network node is operative to perform anyone of the subject matter of method claims 1-16.

There is also provided a computer program comprising instructions which when executed on at least one processor of the network node according to claim 17, cause tat least said one processor to carry out the method according to anyone of claim 1-16.

A carrier containing the computer program according to claim 18, wherein the carrier is one of a computer readable storage medium; an electronic signal, optical signal or a radio signal.

There is also provided a method performed by a (target) UE, for beam management, the UE being served by a radio network node, s-gNB, in a communications network comprising at least said s-gNB and at least one neighbouring network node, n-gNB, neighbouring said s-gNB the method comprising:

receiving, from a network node, a configuration message for configuring the UE with at least one reference signal (RS) resource setting (e.g. at least one synchronization signal block resource setting or a PRS resource setting) containing a configuration of a number of resource sets, wherein each recourse set containing at least one RS resource, associated with at least one n-gNB, wherein each configuration contains information on a time and a frequency location behavior of said least one received RS resource associated with a n-gNB and wherein each RS resource is transmitted from an associated n-gNB employing beamforming, and received by the UE; receiving, from the network node, a configuration message for configuring the UE with at least one Channel State Information (CSI) reporting setting providing instructions to the UE on when and how to report, on said configured RS resources associated with respective gNB; at least a measurement information beam report; transmitting to the network node at least one beam report;

receiving, from the network node a configuration message for configuring the UE with at least one PRS resource set configuration;

receiving from the network node a configuration for configuring at least one CSI reporting setting to provide instructions to the target UE on when to perform at least one beam measurement and at least one measurement on Time-Of-Arrival, TOA, parameter or Reference Signal Time Difference, RSTD, parameter or Round Trip Time, RTT, parameter of the configured PRS and/or RS resources and how to report these parameters;

performing TOA (or RSTD and/or RTT) measurements on the received DL RS (PRS, RS, CSI-RS, SSB) beams and providing at least one beam report to the s-gNB or the LMF; and

transmitting to the network node or s-gNB or LMF tat least said measurement beam report including at least one value of each identified beam-ID along with an

associated signal strength/quality indicator and one or several TOA or RSTD or RTT estimates associated with each received DL beam.

According to another aspect of embodiments herein, there is also provided a UE (e.g. a target UE) for beam management, the UE comprising a processor and a memory, said memory containing instructions executable by said processor whereby said the network node is operative to perform the subject-matter of anyone of claims east claim 20-24.

There is also provided a computer program comprising instructions which when executed on at least one processor of the UE according to claim 25, cause the at least said one processor to carry out the method according to the subject-matter of anyone of claims 20-24.

A carrier is also provided containing the computer program according to claim 26, wherein the carrier is one of a computer readable storage medium; an electronic signal, optical signal or a radio signal.

There is also provided a Location and Measurement Function residing in any suitable network node for DL and UL beam management for positioning measurements as clear from the detailed description. Many of the functions performed by the radio network node above may be performed by the LMF as will be readily clear from the detailed description.

An advantage with embodiments herein is to introduce new useful schemes for mobile networks employing beamforming, on how to combine positioning reference signal transmission in both downlink and uplink directions with all details necessary to integrate with beam management and beamforming (including signaling).

Another advantage is that by configuring UE with at least one RS resource setting (e.g. synchronization resource block setting or PRS resource setting) of at least one neighbouring network node (n-gNB), the UE does not need to blindly detect said resource block of said at least one n-gNB.

Therefore, by exploiting the a priori knowledge of synchronization signal resource block(s) of each neighbouring n-gNBs which are each involved in the method herein, the overall synchronization signal block detection complexity at the UE is reduced and the detection performance is improved.

In addition, the amount of signaling is reduced since the UE knows when to perform the detection.

Another advantage with some embodiments herein is to reduce the feedback overhead by grouping DL SSB beams (ssb-lndex values as will be exemplified) reported with respect to the gNB index they are associated with.

BRIEF DESCRIPTION OF THE DRAWINGS

Examples of embodiments and advantages of the embodiments herein are described in more detail with reference to attached drawings in which:

Figure 1 depicts an example of a signaling flow diagram according to exemplary embodiments herein.

Figure 2 depicts an example of a UE equipped with two panels or antenna ports, which may be used in a communication network employing embodiments herein.

Figure 3 illustrates an example of a network scenario wherein embodiments herein may be applied

Figure 4 illustrates a flowchart of a method performed by a network node according to some exemplary embodiments herein.

Figure 5 is a block diagram depicting a network node according to exemplary embodiments herein.

Figure 6 illustrates a flowchart of a method performed by a UE according to some exemplary embodiments herein.

Figure 7 is a block diagram depicting a UE according to exemplary embodiments herein.

DETAILED DESCRIPTION

In the following, is presented a detailed description of the exemplary embodiments in conjunction with the drawings, in several scenarios, to enable easier understanding of the solution(s) described herein.

It should be emphasized that a panel discussed throughout this disclosure may be associated with at least one antenna port. Below are some examples demonstrating that where basically a panel may be associated with more than an antenna port, for example a set of antenna ports. Note that a panel may be associated with any number of antenna ports, 1 , 2, 3, 4, ..., 64, etc. and the embodiments herein are not restricted to any particular number of antenna ports associated with a panel. Generally, the number of antenna ports is a design parameter depending on cost, size, complexity of a UE with such a panel or antenna ports.

In the following description, a UE may be assumed to be in a Radio Resource Control (RRC) connected mode and the beam management procedure with a serving network node or service gNB (s-gNB) (initial beam acquisition and beam refinement) is accomplished.

The following disclosure according to exemplary embodiments herein describes an extension of the current 3GPP Release-15 beam-reporting scheme (see [2]) to facilitate DL and UL beam reporting in combination with position-related parameters reporting over multiple cells or multiple network nodes or TPs.

In the following description, CSI-RS is considered as an example of a positioning reference signal. Note however that the present disclosure is not in any way restricted to CSI-RS, instead CSI-RS may also be replaced by any other reference signal as such TRS (CSI-RS for Tracking) or PT-RS (Phase Tracking Reference Signal), PRS or any suitable positioning reference signal currently known and also not yet defined positioning reference signals.

Before summarizing the main procedural steps employed by the exemplary embodiments herein, a scenario 100 depicting an example of a signaling flow

diagram according to exemplary embodiments herein is first presented with reference to Figure 1 depicting an exemplary beam management procedure.

As shown, the different entities that may be employed are a UE (or a target UE), a serving network node (s-gNB), at least one neighbouring radio network node (n-gNB) and a Location Measurement Function (LMF) which can reside anywhere in the network and may be integral or internal part of any suitable network node (e.g. a gNB or a server etc.). In the example of Figure 1 , a reference signal such as the SS/PBCH synchronization signal (or SSB) is used, although as mentioned earlier, the embodiments are not restricted to SS/PBCH. For example, the embodiments herein may employ the PRS signal instead of the SSB. The example is only presented for facilitating and allowing the skilled reader to understand how the exemplary embodiments herein may be employed.

In Figure 1 , the following referrals referring to the different signals and/or functions are used and highlighted below:

101 . Signaling of SS/PBCH block resource settings of neighbouring cells

The s-gNB is adapted to configure the target UE with at least one synchronization signal (e.g. SS/PBCH) block resource settings via higher layer signaling (RRC) containing a configuration of a number of SS/PBCH block sets associated with at least one n-gNB. Each configuration contains information on the time and frequency behavior of the SS/PBCH block resource associated with the n-gNB. The configuration may contain information on the time and frequency location of each configured SS/PBCH block resource, the SS/PBCH block resource bandwidth, periodicity, Primary Cell Identifier (PCI), SS/PBCH block index, and several higher layer parameters [3]. Each configured SS/PBCH block resource set may contain one or more SS/PBCH block resources and may be associated to a specific n-gNB. The SS/PBCH block resource typically comprises a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), the PBCH, and at least a PBCH-DMRS.

Configuring the target UE with the SS/PBCH block resource settings of the n-gNBs has the advantage that the UE does not need to detect blindly the SS/PBCH block

resources of the n-gNBs. Therefore, by exploiting the a priori knowledge of the SS/PBCH block resources of the n-gNBs, the overall SS/PBCH block detection complexity at the UE is reduced and the detection performance is improved. In addition, the amount of signaling is reduced since the UE knows when to perform the detection. Again, the embodiments herein are not restricted to SS/PBCH meaning that the advantages presented above are also achieved when other type of synchronization signal blocks or reference signals such as PRS are used.

The DL SS/PBCH block reference signals contained in a SS/PBCH block resource are typically transmitted by each n-gNB using a beamforming operation or employing beamforming to achieve certain spatial coverage. Each SS/PBCH block resource may therefore be associated with a DL SSB transmission beam.

In the context of beamforming, the DL SSB transmission beams may be Time Division Multiplexed (TDM) in different symbol periods or slots of a sub frame (see [1]). For example, the first DL SSB beam may be transmitted in a first symbol period; the second DL SSB beam may be transmitted in a second symbol period; and so on. A SSB transmitted using a beam is referred to here as a SSB beam.

Referring back to Figure 1 , the signaling diagram further comprises:

102 Signaling of reporting quantities for DL beam report

The serving network node, s-gNB, is adapted to configure the UE with one or several higher-layer CSI reporting settings to provide instructions (triggering conditions and reporting quantities) to the UE on when and how to report measurement information on the configured SSB beams (SS/PBCH block resources) associated with respective n-gNB. The list of CSI quantities the UE has to report may follow the ReportQuantity as a part of ReportConfig [2] The report quantity configured at the UE is either RSRP or Signal to Interference Noise Ratio (SINR) or any suitable quantity that may be used to measure the quality of a signal.

According to an exemplary embodiment, the following new options are added to values of the higher-layer parameter ReportQuantity [2]:

- gNB-lndex-ssb-lndex-RSRP (or gNB-lndex-RS-RSRP), and/or

gNB-lndex-ssb-lndex-SINR (or gNB-lndex-RS-SINR)

Moreover, the s-gNB may configure the UE with group-based or non-group-based beam reporting for reporting the information of the received SSB beams from the different n-gNBs. In case of group-based beam reporting, the UE reports gNB-ID and beam-ID values associated with a single and/or different n-gNBs that may be received simultaneously by the UE with the same setting of the Receiver (Rx) spatial filters (i.e., the same receive beam(s)). In case of non-group-based beam reporting, the UE reports a total of beam-IDs without taking into account if the SSB resources reported may be received simultaneously or not.

103. DL beam reporting on received DL RS (SSB, CSI-RS) beams over multiple qNBs

The target UE is configured to perform measurements on the DL SSB beams transmitted by the n-gNB, and/or the DL RS (SSB and/or CSI-RS) beams transmitted by the s-gNB. After the beam measurements, the target UE is configured to provide at least one report or a single or multiple beam report(s) to the s-gNB and/or the Location Measurement Function (LMF). The UE can provide the beam report to the LMF within a location measurements transaction in the NR positioning protocol (NPP). The beam report contains at least a gNB identifier, a beam-identifier and a measure of the signal quality corresponding to the received DL beam associated with a configured SS/PBCH block resource or CSI-RS resource or PRS resource at the UE. The strength/quality measure may be the SINR or an RSRP (as configured in step 102). In the case that RSRP is configured, the UE reports the RSRP of the DL beams received at one or multiple UE antenna arrays (array panels or antenna ports). The beam report then includes at least one set of (gNB-ID (gNB-IDentifier), beam-ID, RSRP etc.) with respect to the received SSB beams and sets of (beam-ID, RSRP) with respect to the received CSI-RS beams associated with the s-gNB. For example, the beam report with respect of the received SSB beams is given by the following sets:

CLAIMS

1. A method performed by a Location Management Function, LMF, or a serving network node, s-gNB, serving a User Equipment, target UE, in a communications network comprising at least said gNB and at least one neighbouring network node, n-gNB, neighbouring said s-gNB, the method comprising:

(101) configuring the target UE with at least one reference signal, RS, resource setting containing a configuration of a number of resource sets, wherein each resource set containing at least one RS resource, associated with at least one n-gNB or s-gNB, wherein each configuration contains information on a time and a frequency location behavior of said at least one received RS resource associated with a n- gNB or s-gNB, and wherein each RS resource is transmitted from an associated n-gNB or s-gNB employing beamforming, and received by the target UE;

(102) configuring the target UE with at least one Channel State Information, CSI, reporting setting to provide instructions to the UE on when and how to report, on said configured RS resources associated with respective n-gNB or s-gNB; at least a measurement information beam report;

(103) receiving at least one beam report from the target UE;

(104) informing at least one gNB with at least one resource configuration;

(105) configuring the target UE with at least one PRS resource configuration;

(106) configuring at least one CSI reporting setting to provide instructions to the target UE on when to perform at least one beam measurement and at least one measurement on Time-Of-Arrival, TOA, parameter or Reference Signal Time Difference, RSTD, parameter or Round Trip Time, RTT, parameter of the configured PRS and/or RS resources and how to report these parameters;

(108) receiving, from the target UE, at least one measurement beam report including at least one value of each identified beam-ID along with an associated signal strength/quality indicator and one or several TOA or RSTD or RTT estimates associated with each received DL beam; and

(109) estimating the location of the target UE using at least the received measurement beam report received from the target UE.

2. The method according to claim 1 wherein said measurement information includes CSI quantities comprising at least a gNB-index, -RS-lndex-RSRP associated with a gNB; and/or gNB-lndex-RS-lndex-SINR associated with the gNB, wherein RSRP stands for Reference Signals Received Power, and SINR stands for Signal to Interference Noise Ratio.

3. The method according to claim 1 or claim 2 further comprising configuring the target UE with group-based or non-group-based beam reporting for reporting said measurement information of the received RS resources from the different n-gNBs.

4. The method according to anyone of claims 1-3 wherein said at least one beam report includes at least a gNB identifier, a beam-identifier and a measure of the signal quality corresponding to a received DL beam associated with at least one configured SS/PBCH block resource or at least one PRS resource at the target UE.

5. The method according to anyone of claims 1-4 wherein N out of K beams reported are associated with the same gNB (e.g., the same gNB-index) and wherein the beams reported may be grouped with respect to the gNB-index they are associated with; and wherein the gNB-index refers to a unique identifier associated with a n-gNB.

6. The method according to claim 1 comprising exchanging said at least one RS beam report with at least one n-gNB includes exchanging a RS beam

report associated with the strongest downlink beam having the highest RSRP or SINR.

7. The method according to claim 1 wherein said at least one RS beam report enables the LMF to use said information to assign beam pairs and time/frequency resources.

8. The method according to claim 4 comprising employing said at least one PRS resource to generate a set of DL PRS beams, and wherein said PRS resources are orthogonal or quasi-orthogonal for reducing interference at the target UE caused by the different DL PRS beams from said at least one n-gNB and or the s-gNB.

9. The method according to anyone of claims 1 -8 wherein the first TOA, RSTD, or RTT estimate is associated with the strongest path component of the DL beam, the second estimate is associated with the second strongest path component of the DL beam and so no.

10. The method according to anyone of claims 1 -9 comprising using said at least one beam report provided by the target UE to estimate the target UE’s location.

1 1 . The method according to anyone of claims 1 -10 comprises configuring the UE with a Sounding Reference Signal, SRS resource setting containing one or more SRS resources used for generating UL SRS beam-based TOA estimation.

12. The method according to claim 1 1 wherein each SRS resource is configured with a higher-layer parameter, spatialRelationlnfo, instructing the UE to reuse a spatial receiver, Rx, filter used for reception of a DL beam associated with a n-gNB for a corresponding uplink beam transmission with the n-gNB.

13. The method according to claim 12 comprising receiving, at the LMF, from at least one n-gNB, a report including one or more of an SRS beam ID, a ToA estimate and a Direction-of-Arrival, DOA, estimate of each path component associated to a ToA.

14. The method according to anyone of claims 1 -13 comprising configuring the UE with multiple TOA reporting per DL beam and receiving from the UE a report including a set of TOA values relating to a first or strongest TOA value.

15. The method according to anyone of claims 1 -14 comprising configuring the UE to perform TOA measurements on received DL RS beams and configuring the UE to provide a beam report to the s-gNB or to the LMF.

16. The method according to anyone of claims 1 -15 comprising deciding, by the LMF, based on RSRP or SINR reports received from more than one UE, the PRS resources used from one or more gNBs.

17. A radio network node (500) for beam management for positioning measurements, the network node (500) comprising a processor (510) and a memory (520), said memory (520) containing instructions executable by said processor (510) whereby said radio network node (500) is operative to perform any one of the subject-matter of method claims 1 -16.

18. A computer program comprising instructions which when executed on at least one processor (510) of the network node according to claim 17, cause at least said one processor (510) to carry out the method according to anyone claims 1 -16.

19. A carrier containing the computer program according to claim 18, wherein the carrier is one of a computer readable storage medium; an electronic signal, optical signal or a radio signal.

20. A method performed by a UE, target UE, served by a network node, s-gNB, in a communications network comprising at least said s-gNB and at least

one neighbouring network node, n-gNB, neighbouring said s-gNB, the method comprising:

(601 ) receiving, from a network node a configuration message for configuring the target-UE with at least one reference signal, RS, resource setting containing a configuration of a number of resource sets, wherein each resource set containing at least one RS resource, associated with at least one n-gNB or s-gNB, wherein each configuration contains information on a time and a frequency location behavior of said at least received RS resource associated with a n-gNB or s-gNB, and wherein each RS resource is transmitted from an associated n-gNB or s-gNB employing beamforming, and received by the target UE;

(602) receiving, from the network node, a configuration message for configuring the target UE with at least one Channel State Information, CSI, reporting setting with instructions on when and how to report, on said configured RS resources associated with respective gNB; at least a measurement information beam report

(603) transmitting to the network node at least one beam report;

(604) receiving, from the network node a configuration message for configuring the target UE with at least one PRS resource set configuration;

(605) receiving from the network node a configuration for configuring at least one CSI reporting setting to provide instructions to the target UE on when to perform at least one beam measurement and at least one measurement on Time-Of-Arrival, TOA, parameter or Reference Signal Time Difference, RSTD, parameter or Round Trip Time, RTT, parameter of the configured PRS and/or RS resources and how to report these parameters;

(606) performing TOA (or RSTD and/or RTT) measurements on the received DL RS (CSI-RS, SSB, PRS) beams and providing at least one beam report to the s-gNB or the LMF; and

(607) transmitting to the network node or s-gNB or the LMF at least said measurement beam report including at least one value of each identified beam-ID along with an associated signal strength/quality indicator and one or several TOA or RSTD or RTT estimates associated with each received DL beam.

21 . The method according to claim 20 wherein the UE is configured with group- based or non-group-based beam reporting for reporting said measurement information of the received RS resources from the different n-gNBs.

22. The method according to claim 21 wherein, in case of group-based beam reporting, the UE reporting at least a gNB identifier and at least one beam- identifier value associated with a single and/or different n-gNBs, for beams received simultaneously by the UE with a same setting of at least one receiver spatial filter.

23. The method according to claim 21 wherein, in case of non-group-based beam reporting, the UE reporting a total of beam-IDs.

24. The method according to anyone of claims 20-23 wherein the UE is configured with multiple TOA reporting per downlink, DL, beam; and the UE reporting a set of TOA values relating to a first or strongest TOA value.

25. A UE (700), target UE, for beam management for positioning measurements, UE (700) comprising a processor (710) and a memory (720), said memory (720) containing instructions executable by said processor (710) whereby said UE (700) is operative to perform at least the steps of claim 20-24.

26. A computer program comprising instructions which when executed on at least one processor (710) of the UE (700) according to claim 25, cause the at least said one processor (710) to carry out the method according to at least claim 20-24.

27. A carrier containing the computer program according to claim 26, wherein the carrier is one of a computer readable storage medium; an electronic signal, optical signal or a radio signal.