Maintenance of NR positioning support

DL Reference Signals for NR Positioning

R1-2001558	Maintenance of DL PRS for NR positioning	Huawei, HiSilicon

R1-2001600	Maintenance of DL reference signals for NR positioning	ZTE

R1-2001685	Discussion on remaining issues on DL RS for NR positioning	vivo

R1-2001731	Remaining Issues on DL Positioning Reference Signal	OPPO

R1-2001954	Remaining details of DL Reference signals for NR positioning	LG Electronics

R1-2002046	Remaining details on DL Reference Signals	Futurewei

R1-2002095	Remaining issues on DL PRS for NR Positioning	CATT

R1-2002144	DL Reference Signals for NR Positioning	Samsung

R1-2002288	Corrections to DL reference signals for NR positioning	Intel Corporation

R1-2002557	Discussion on DL PRS processing & related UE capabilities	Qualcomm Incorporated

R1-2002620	Maintenance of rel16 DL reference signals for NR positioning	Ericsson

[100b-e-NR-Pos-01] Email discussion/approval on the following issues related to UE DL PRS processing capabilities by 4/24; if necessary, followed by endorsing the corresponding TPs by 4/29 – Alexey (Intel)

How to define duration for UE DL PRS processing capabilities

Reporting of UE DL PRS processing capabilities and T values

Dependence on BW and SCS

Simultaneous DL PRS processing across frequency layers

UE DL PRS processing capabilities for cases with and without measurement gap configured

Agreement:

For the purpose of DL PRS processing capability, the duration of DL PRS symbols (K) in ms within any P msec window, is calculated by

Type 1 duration calculation with

Type 2 duration calculation with

where

Type 1 or Type 2 is reported as UE capability,

is the set of slots of a serving cell within the P msec window in the positioning frequency layer that contains potential DL PRS resources considering the actual nr-DL-PRS-ExpectedRSTD, nr-DL-PRS-ExpectedRSTD-Uncertainty provided for each pair of DL PRS Resource Sets (target and reference),

for Type 1, is the smallest interval in ms within slot corresponding to an integer number of OFDM symbols of a serving cell that covers the union of the potential PRS symbols and determines the PRS symbol occupancy within slot .

Interval considers the actual nr-DL-PRS-ExpectedRSTD, nr-DL-PRS-ExpectedRSTD-Uncertainty provided for each pair of DL PRS Resource Sets (target and reference).

Agreement:

For UE DL PRS processing capability,

UE reports one combination of (N, T) values per band, where N is a duration of DL PRS symbols in ms processed every T ms for a given maximum bandwidth (B) in MHz supported by UE

Additionally, UE reports new parameter, number of DL PRS resources that UE can process in a slot, which is reported per SCS per band.

Values: {1, 2, 4, 8, 12, 16, 32, 64}

The following sets of values for N, T and B are supported

Values for N = {0.125, 0.25, 0.5, 1, 2, 4, 8, 12, 16, 20, 25, 30, 35, 40, 45, 50} ms

Values for T = {8, 16, 20, 30, 40, 80, 160, 320, 640, 1280} ms

Values for maximum BW reported by UE = {5, 10, 20, 40, 50, 80, 100, 200, 400} MHz

Agreement:

The reporting of (N, T) values for maximum BW in MHz is not dependent on SCS

Agreement:

UE capability for simultaneous DL PRS processing across positioning frequency layers is not supported in Rel.16 (i.e. for a UE supporting multiple positioning frequency layers, a UE is expected to process one frequency layer at a time)

Agreement:

UE capability for DL PRS processing is defined assuming the case with configured measurement gap and a maximum ratio of measurement gap length (MGL) / measurement gap repetition period (MGRP) of no more than X%

FFS: X

[100b-e-NR-Pos-02] Email discussion/approval on the following issues by 4/23; if necessary, followed by endorsing the corresponding TPs by 4/28 – Alexey (Intel)

Corrections to 38.211

PRS/SSB collision handling for neighbour cells

Missing value in muting pattern

Periodicity in slots for DL PRS transmission

Relationship b/w number of symbols and comb factor

NR-TimingMeasQuality for RSTD

Agreement:

The following text proposal for TS 38.211 is agreed.

--------------- Begin TP -------------------

7.4.1.7.3	Mapping to physical resources in a downlink PRS resource

-	the symbol is not used by any SS/PBCH block used by the serving cell for downlink PRS transmitted from the serving cell or any SS/PBCH block from a non-serving cell indicated by the higher-layer parameter SSB-positionInBurst for downlink PRS transmitted from a the same non-serving cell;

----------------- End TP ---------------------------

Agreement:

The following text proposal for TS 38.211 is agreed.

------------------ Begin TP ----------------------

7.4.1.7.4 Mapping to slot in a downlink PRS resource set

<Text is omitted>

For a downlink PRS resource in a downlink PRS resource set, the UE shall assume the downlink PRS resource being transmitted when the slot and frame numbers fulfil

<Text is omitted>

-	is bit in the bitmap given by the higher-layer parameter DL-PRS-MutingPattern where is the size of the bitmap;

-	is bit in the bitmap given by the higher-layer parameter DL-PRS-MutingPattern;

<Text is omitted>

the periodicity is given by the higher-layer parameter dl-PRS-Periodicity-and-ResourceSetSlotOffset-r16;

<Text is omitted>

---------------------- End TP -------------------------

Agreement:

The following text proposal for TS 38.211 is agreed.

--------------------------- Begin TP ----------------------------

7.4.1.7.3	Mapping to physical resources in a downlink PRS resource

<Text is omitted>

and where

-	is the first symbol of the downlink PRS within a slot and given by the higher-layer parameter DL-PRS-ResourceSymbolOffset;

-	the size of the downlink PRS resource in the time domain is given by the higher-layer parameter DL-PRS-NumSymbols;

-	the comb size is given by the higher-layer parameter transmissionComb;, such that combination of {, } is one of {2, 2},{4, 2}, {6, 2}, {12, 2}, {4, 4}, {12, 4}, {6, 6}, {12, 6} and {12, 12};

-	the resource-element offset is given by the higher-layer parameter combOffset;

-	the quantity is given by Table 7.4.1.7.3-1.

<Text is omitted>

---------------------------- End TP ----------------------------------

Conclusion:

It is RAN1 understanding that the NR-TimingMeasQuality is the quality for time of arrival measurements

NR-TimingMeasQuality is left up to UE implementation

Notes:

No RAN1 specification changes are required.

NR-TimingMeasQuality measurement is also applicable for the reference timing used in RSTD measurements

UL Reference Signals for NR Positioning

R1-2001559	Maintenance of SRS for NR positioning	Huawei, HiSilicon

R1-2001601	Maintenance of UL reference signals for NR positioning	ZTE

R1-2001686	Discussion on remaining issues on UL RS for NR positioning	vivo

R1-2001732	Remaining Issues on UL Positioning Reference Signal	OPPO

R1-2002038	Maintenance on UL reference signals for NR Positioning	Nokia, Nokia Shanghai Bell

R1-2002047	Remaining details on UL Reference Signals	Futurewei

R1-2002096	Remaining issues on UL SRS for NR Positioning	CATT

R1-2002145	UL Reference Signals for NR Positioning	Samsung

R1-2002199	Discussion on staggered SRS for NR Positioning	Fraunhofer IIS, Fraunhofer HHI

R1-2002286	Corrections to UL reference signals for NR positioning	Intel Corporation

R1-2002621	Maintenance of rel16 UL reference signals for NR positioning	Ericsson

[100b-e-NR-Pos-03] Email discussion/approval on the following issues by 4/23; if necessary, followed by endorsing the corresponding TPs by 4/28 – Florent (Ericsson)

UL SRS for positioning

Simultaneous SRS transmission in a single symbol

Intra-band collision between PosSRS and MimoSRS

PHR for SRS positioning configuration

UL RTOA reference time

R1-2003061	TPs and remaining open issues from email discussion [100b-e-NR-Pos-03] on UL SRS for positioning and UL RTOA reference time	Moderator (Ericsson)

Agreement:

Adopt the following text proposal for Clause 6.2.1.4 of TS 38.214:

===================== Unchanged parts omitted ======================

For single carrier operations, the UE does not expect to be configured on overlapping symbols with more than one SRS resources configured by the higher layer parameter SRS-PosResource with resourceType of the SRS resources as ‘periodic’.

For single carrier operations, the UE does not expect to be triggered to transmit SRS on overlapping symbols with more than one SRS resources configured by the higher layer parameter SRS-Pos-Resource with resourceType of the SRS resources as ‘semi-persistent’ or ‘aperiodic’.

===================== Unchanged parts omitted ======================

Agreement:

Introduce a new UE capability for the number of SRS resources for positioning on a symbol for intra-band CA

FFS: Capability for simultaneous SRS transmission across bands for inter-band CA

Continue discussion on capability for intra-band/inter-band CA, including potential TP to 38.214 to reflect the new capability.

Agreement:

Change all occurrences of “[SRS-for-positioning]” to the higher layer parameter agreed by RAN2 WG called “SRS-PosResource-r16” in TS 38.211 Section 6.4.1.4

Conclusion:

For release 16, type3 PHR based on SRS for positioning is not supported.

Agreement:

Introduce a new parameter to the higher layer parameter list according to the table below.

The RTOA reference time is defined as T0+tSRS, where

T0 is the nominal beginning time of SFN 0 provided by LMF.

, where and are the system frame number and the subframe number of the SRS, respectively

Send an LS to RAN3 reflecting the consensus.

Table 1 additional parameter to the higher layer parameter list

NR_pos-Core	NR UL Measurement Report Configuration	FFS in RAN3 WG	SFN Initialization time	SFN initialization time	New	The nominal beginning time of SFN 0 for SRS	Same as SFN initialization time in LPPa BIT STRING (64)	NRPPa 38.455	Time in seconds relative to 00:00:00 on 1 January 1900 (calculated as continuous time without leap seconds and traceable to a common time reference) where binary encoding of the integer part is in the first 32 bits and binary encoding of the fraction part in the last 32 bits. The fraction part is expressed with a granularity of 1 /2**32 second.

Agreement:

A new UE capability is introduced for the number of simultaneous transmissions of SRS resources for positioning for inter-band CA, where the SRS resources are on different CCs.

The text in TP#A below is added to 38.214

TP#A ===================== Unchanged parts omitted ====================== For intra-band and inter-band CA operations, a UE can simultaneously transmit more than one SRS resources configured by SRS-PosResource on different CCs, subject to UE’s capability provided by [XX] and [YY] respectively. ===================== Unchanged parts omitted ======================

Agreement:

Adopt the text proposal TP#B in Section 2.3.1 for TS 38.213

Agreement:

Adopt the text proposal TP#D in Section 2.4.1 for TS 38.213

LS on UL RTOA reference time approved in R1-2003054

UE and gNB measurements for NR Positioning

R1-2001560	Maintenance of NR positioning measurements	Huawei, HiSilicon

R1-2001602	Maintenance of UE and gNB measurements for NR positioning	ZTE

R1-2001733	Remaining Issues on Measurements for NR Positioning	OPPO

R1-2002048	Remaining details on Measurements	Futurewei

R1-2002097	Remaining issues on NR Positioning Measurements	CATT

R1-2002146	UE and gNB measurements for NR Positioning	Samsung

R1-2002622	Maintenance of rel16 UE and gNB measurements for NR Positioning	Ericsson

Physical-layer procedures to support UE/gNB measurements

R1-2001561	Maintenance of physical layer procedures to support positioning measurements	Huawei, HiSilicon

R1-2001603	Maintenance of physical-layer procedure for NR positioning	ZTE

R1-2001687	Discussion on remaining issues on physical-layer procedures for NR positioning	vivo

R1-2001734	Remaining Issues on Physical Layer Procedures for NR Positioning	OPPO

R1-2001955	Remaining details of physical-layer procedure to support UE/gNB measurements	LG Electronics

R1-2002049	Remaining details on Measurement Procedures	Futurewei

R1-2002098	Remaining issues on NR Positioning Procedures	CATT

R1-2002147	Physical-layer procedures to support UE/gNB measurements	Samsung

R1-2002217	Remaining issues on physical layer procedure for UL SRS transmission	CMCC

R1-2002287	Corrections to physical layer procedures for NR positioning	Intel Corporation

R1-2002623	Maintenance of rel16 Physical-layer procedures to support UE - gNB measurements	Ericsson

[100b-e-NR-Pos-04] Email discussion/approval on the following issues by 4/24; if necessary, followed by endorsing the corresponding TPs by 4/29 – Sven (Qualcomm)

Physical layer procedures

UE RX beam indication for DL-AoD positioning

RSTD/timing reference info clarifications

UE Rx-Tx Time Difference measurements configuration

Pathloss reference configuration

Inter-frequency UE Rx – Tx time difference measurements

Agreement:

Adopt the text proposals in Sections 6.1 and 6.2 of R1-2002989 for TS 38.214, clause 5.1.6.5

Agreement:

Adopt the text proposal in Section 6.3 of R1-2002989 for TS 38.213, clause 7.3.1

Agreement:

Inform RAN4 on the need to clarify the meaning of "the UE is not able to accurately measure" for SRS-Pos power control.

Agreement:

Final LS on criterion of pathloss measurement failure for power control of SRS for positioning agreed in R1-200xxxx

Others

R1-2001735	Discussion on RE mapping in reference signal for NR positioning	OPPO

R1-2002676	On positioning latency and aperiodic SRS	Huawei, HiSilicon