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TS 38.355
5G New Radio —
Sidelink Positioning Protocol (SLPP) Specification
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V19.0.0 (PDF)
2025/09 92 p.
V18.6.0
2025/06 92 p.
Rapporteur:
Mr. Guo, Yi
Intel Corporation (UK) Ltd
full Table of Contents for
TS 38.355
Word version: 18.6.0
each clause number in
'red'
refers to the equivalent title in the Partial Content
1
Scope
p. 7
2
References
p. 7
3
Definitions of terms, symbols and abbreviations
p. 8
3.1
Terms
p. 8
3.2
Abbreviations
p. 8
4
Functionality of Protocol
p. 9
4.1
General
p. 9
4.1.1
SLPP Configuration
p. 9
4.1.2
SLPP Sessions and Transactions
p. 9
4.1.3
SLPP Positioning Methods
p. 9
4.1.4
SLPP Messages
p. 9
4.2
Common SLPP Session Procedure
p. 10
4.3
SLPP Transport
p. 11
4.3.1
Transport Layer Requirements
p. 11
4.3.2
SLPP Duplicate Detection
p. 11
4.3.3
SLPP Acknowledgement
p. 11
4.3.3.1
General
p. 11
4.3.3.2
Procedure related to Acknowledgement
p. 11
4.3.4
SLPP Retransmission
p. 12
4.3.4.1
General
p. 12
4.3.4.2
Procedure related to Retransmission
p. 12
5
SLPP Procedures
p. 13
5.1
Procedures related to capability transfer
p. 13
5.1.1
General
p. 13
5.1.2
Capability Transfer procedure
p. 13
5.1.3
Capability Indication procedure
p. 14
5.1.4
Transmission of SLPP Request Capabilities
p. 14
5.1.5
Reception of SLPP Request Capabilities
p. 14
5.1.6
Transmission of SLPP Provide Capabilities
p. 15
5.2
Procedures related to Assistance Data Transfer
p. 15
5.2.1
General
p. 15
5.2.2
Assistance Data Transfer procedure
p. 15
5.2.3
Assistance Data Delivery procedure
p. 16
5.2.4
Transmission of SLPP Request Assistance Data
p. 16
5.2.5
Reception of SLPP Request Assistance Data
p. 16
5.2.6
Reception of SLPP Provide Assistance Data
p. 16
5.3
Procedures related to Location Information Transfer
p. 17
5.3.1
General
p. 17
5.3.2
Location Information Transfer procedure
p. 17
5.3.3
Location Information Delivery procedure
p. 17
5.3.4
Transmission of Request Location Information
p. 18
5.3.5
Reception of Request Location Information
p. 18
5.3.6
Transmission of Provide Location Information
p. 18
5.4
Error Handling Procedures
p. 19
5.4.1
General
p. 19
5.4.2
Procedures related to Error Indication
p. 19
5.4.3
SLPP Error Detection
p. 19
5.4.4
Reception of an SLPP Error Message
p. 20
5.5
Abort Procedure
p. 20
5.5.1
General
p. 20
5.5.2
Procedures related to Abort
p. 20
5.5.3
Reception of an SLPP Abort Message
p. 20
6
Protocol data units, formats and parameters (ASN.1)
p. 21
6.1
General
p. 21
6.2
SLPP messages
p. 21
6.2.1
General message structure
p. 21
–
SLPP-PDU-Definitions
p. 21
–
SLPP-Message
p. 23
–
SLPP-MessageBody
p. 24
6.2.2
Message body information elements definitions
p. 25
–
RequestCapabilities
p. 25
–
ProvideCapabilities
p. 25
–
RequestAssistanceData
p. 26
–
ProvideAssistanceData
p. 26
–
RequestLocationInformation
p. 27
–
ProvideLocationInformation
p. 28
–
Abort
p. 28
–
Error
p. 29
6.3
SLPP information elements
p. 29
6.3.1
Common information elements
p. 29
–
ARFCN-ValueNR
p. 29
–
CommonIEsAbort
p. 30
–
CommonIEsError
p. 30
–
GNSS-ID-Bitmap
p. 31
–
LCS-GCS-Translation
p. 31
–
LOS-NLOS-Indicator
p. 31
–
NCGI
p. 32
–
NR-PhysCellID
p. 32
–
PositioningModes
p. 33
–
SL-RTD-Info
p. 33
–
SL-TimeStamp
p. 34
–
SL-TimingQuality
p. 35
6.3.2
UE capability information elements
p. 35
6.3.3
Void
p. …
6.4
Multiplicity and type constraint values
p. 36
–
Multiplicity and type constraint definitions
p. 36
–
End of SLPP-PDU-Definitions
p. 36
6.5
SLPP PDU Common Contents
p. 36
–
SLPP-PDU-CommonContents
p. 36
–
CommonIEsRequestCapabilities
p. 37
–
CommonIEsProvideCapabilities
p. 37
–
CommonIEsRequestAssistanceData
p. 37
–
CommonIEsProvideAssistanceData
p. 38
–
CommonIEsRequestLocationInformation
p. 38
–
CommonIEsProvideLocationInformation
p. 43
–
End of SLPP-PDU-CommonContents
p. 50
6.6
SLPP PDU Common SL-PRS Methods Contents
p. 51
–
SLPP-PDU-CommonSL-PRS-MethodsContents
p. 50
–
CommonSL-PRS-MethodsIEsRequestCapabilities
p. 51
–
CommonSL-PRS-MethodsIEsProvideCapabilities
p. 52
–
CommonSL-PRS-MethodsIEsRequestAssistanceData
p. 56
–
CommonSL-PRS-MethodsIEsProvideAssistanceData
p. 56
–
CommonSL-PRS-MethodsIEsRequestLocationInformation
p. 59
–
CommonSL-PRS-MethodsIEsProvideLocationInformation
p. 60
–
End of SLPP-PDU-CommonSL-PRS-MethodsContents
p. 60
6.7
SLPP PDU SL-AoA Contents
p. 60
–
SLPP-PDU-SL-AoA-Contents
p. 60
–
SL-AoA-RequestCapabilities
p. 61
–
SL-AoA-ProvideCapabilities
p. 61
–
SL-AoA-RequestAssistanceData
p. 63
–
SL-AoA-ProvideAssistanceData
p. 64
–
SL-AoA-RequestLocationInformation
p. 65
–
SL-AoA-ProvideLocationInformation
p. 66
–
End of SLPP-PDU-SL-AoA-Contents
p. 68
6.8
SLPP PDU SL-RTT Contents
p. 68
–
SLPP-PDU-SL-RTT-Contents
p. 68
–
SL-RTT-RequestCapabilities
p. 69
–
SL-RTT-ProvideCapabilities
p. 69
–
SL-RTT-RequestAssistanceData
p. 72
–
SL-RTT-ProvideAssistanceData
p. 72
–
SL-RTT-RequestLocationInformation
p. 72
–
SL-RTT-ProvideLocationInformation
p. 73
–
End of SLPP-PDU-SL-RTT-Contents
p. 75
6.9
SLPP PDU SL-TDOA Contents
p. 76
–
SLPP-PDU-SL-TDOA-Contents
p. 76
–
SL-TDOA-RequestCapabilities
p. 76
–
SL-TDOA-ProvideCapabilities
p. 77
–
SL-TDOA-RequestAssistanceData
p. 78
–
SL-TDOA-ProvideAssistanceData
p. 79
–
SL-TDOA-RequestLocationInformation
p. 79
–
SL-TDOA-ProvideLocationInformation
p. 80
–
End of SLPP-PDU-SL-TDOA-Contents
p. 82
6.10
SLPP PDU SL-TOA Contents
p. 83
–
SLPP-PDU-SL-TOA-Contents
p. 83
–
SL-TOA-RequestCapabilities
p. 83
–
SL-TOA-ProvideCapabilities
p. 84
–
SL-TOA-RequestAssistanceData
p. 85
–
SL-TOA-ProvideAssistanceData
p. 86
–
SL-TOA-RequestLocationInformation
p. 86
–
SL-TOA-ProvideLocationInformation
p. 87
–
End of SLPP-PDU-SL-TOA-Contents
p. 89
6.11
Information elements related to Discovery Message
p. 89
–
NR-DiscoveryMessageMetaDataContents
p. 89
–
RSPP-Metadata
p. 90
–
End of NR-DiscoveryMessageMetaDataContents
p. 90
A
Change history
p. 92