Content for TS 38.355 Word version: 18.2.0

1 Scope p. 7

The present document specifies the Sidelink Positioning Protocol (SLPP) for the interface between UEs and between UE and LMF.

2 References p. 7

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 38.331: "NR; Radio Resource Control (RRC); Protocol specification".

[3]

TS 38.305: "NG Radio Access Network (NG-RAN); Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN".

[4]

ITU-T Recommendation X.691 (07/2002): "Information technology - ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)" (Same as the ISO/IEC International Standard 8825-2).

[5]

TS 23.273: "5G System (5GS) Location Services (LCS); Stage 2".

[6]

TS 38.211: "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical channels and modulation".

[7]

TS 23.032: "Universal Geographical Area Description (GAD)".

[8]

TR 38.901: "Technical Specification Group Radio Access Network; Study on channel model for frequencies from 0.5 to 100 GHz".

[9]

TS 23.287: "Architecture enhancements for 5G System (5GS) to support Vehicle-to-Everything (V2X) services".

[10]

TS 38.101-2: "NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone".

[11]

TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone".

[12]

TS 23.586: "Technical Specification Group Services and System Aspects; Architectural Enhancements to support Ranging based services and Sidelink Positioning".

[13]

TS 38.133: "NR; Requirements for support of radio resource management".

[14]

TS 23.304: "Technical Specification Group Services and System Aspects; Proximity based Services (ProSe) in the 5G System (5GS)".

[15]

TS 38.321: "NR; Medium Access Control (MAC); Protocol specification".

3 Definitions of terms, symbols and abbreviations p. 8

3.1 Terms p. 8

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

Field:

The individual contents of an information element are referred to as fields.

Ranging:

Refers to the determination of the distance between two UEs or more UEs and/or the direction of one UE (i.e. Target UE) from another UE via PC5 interface.

Ranging/Sidelink Positioning:

AS functionality enabling ranging-based services and sidelink positioning as specified in TS 23.586.

SL Anchor UE:

A UE, supporting positioning of target UE, e.g. by transmitting and/or receiving reference signals for positioning, providing positioning-related information, etc. over the Sidelink interface.

SL Server UE:

A UE offering position method determination, assistance data distribution and/or location calculation functionalities for sidelink positioning and ranging based services. It interacts with other UEs over PC5 as necessary in order to determine a ranging/SL position method, distribute assistance data and calculate the location of the target UE. A Target UE or SL Anchor UE can act as SL Server UE if any of the functionalities is supported.

SL Target UE:

A UE whose distance, direction and/or position is measured with the support from one or multiple SL Anchor UEs using Sidelink in the Ranging based service and Sidelink positioning.

UE-only Operation:

Operation of Ranging/Sidelink Positioning in which the service request handling and result calculation are performed by UE.

3.2 Abbreviations p. 8

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

DFN

Direct Frame Number

LMF

Location Management Function

LOS

Line-of-Sight

NLOS

Non-Line-of-Sight

RTD

Relative Time Difference

Sidelink

SL-AoA

Sidelink Angle-of-Arrival

SLPP

Sidelink Positioning Protocol

SL-PRS

Sidelink Positioning Reference Signals

SL-PRS-RSRP

Sidelink Positioning Reference Signals based Reference Signal Received Power

SL-PRS-RSRPP

Sidelink Positioning Reference Signals based Reference Signal Received Path Power

SL-PRS-RSTD

Sidelink Positioning Reference Signals based Reference Signal Time Difference

SL-PRS-RTOA

Sidelink Positioning Reference Signals based Relative Time of Arrival

SL-RTT

Sidelink Round Trip Time

SL-TDOA

Sidelink Time Difference Of Arrival

SL-TOA

Sidelink Time Of Arrival

User Equipment