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Content for  TR 38.857  Word version:  17.0.0

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9 Positioning integrity and reliability  9.1 Integrity overview - Background information  9.2 Use cases  9.3 Positioning integrity error categories  9.4 Positioning integrity methods  10 Identified NR impacts in Rel-17  11 Conclusions  B Appendix to summary of performance evaluations  C Appendix to Performance evaluations for R17 performance targets  $ Change history 

 

9  Positioning integrity and reliability  p. 90

9.1  Integrity overview - Background information  p. 90

9.1.1  Integrity concepts  p. 90

9.1.1.1  Accuracy and integrity  p. 91

9.1.1.2  Integrity key performance indicators (KPIs)  p. 91

9.1.1.3  Integrity protection level (PL)  p. 92

9.1.1.4  Relationship between the PL and KPIs  p. 92

9.2  Use cases  p. 94

9.2.1  Automotive  p. 94

9.2.1.1  Road-level identification and road-user charging  p. 94

9.2.1.2  Lane-level identification  p. 95

9.2.2  Rail  p. 95

9.2.2.1  Safety-critical applications  p. 95

9.2.2.2  Liability-critical applications  p. 95

9.2.3  Industrial IoT  p. 96

9.2.3.1  Path and zone identification for AGV  p. 96

9.2.4  Use case summary  p. 96

9.3  Positioning integrity error categories  p. 97

9.3.1  RAT-independent  p. 97

9.3.1.1  A-GNSS feared events  p. 97

9.3.1.1.1  Feared events in the GNSS assistance data  p. 98
9.3.1.1.2  Feared events during positioning data transmission  p. 98
9.3.1.1.3  GNSS feared events  p. 98
9.3.1.1.4  UE feared events  p. 100
9.3.1.1.5  LMF feared events  p. 100

9.4  Positioning integrity methods  p. 101

9.4.1  RAT-independent  p. 101

9.4.1.1  A-GNSS positioning integrity methods  p. 101

9.4.1.1.1  Signalling considerations  p. 102
9.4.1.1.2  Summary of A-GNSS positioning integrity methods  p. 103

10  Identified NR impacts in Rel-17  p. 104

10.1  NR positioning for UEs in RRC_INACTIVE state  p. 104

10.2  On-demand transmission and reception of DL PRS  p. 105

10.3  Aggregation of DL PRS resources  p. 105

10.4  Aggregation of SRS for positioning resources  p. 105

10.5  Enhancements for UE Rx/Tx and gNB Rx/Tx timing delays  p. 105

10.6  Enhancements for angle based methods  p. 106

10.7  Enhancements of information reporting from UE and gNB for supporting multipath/NLOS mitigation  p. 106

10.8  Enhancements of signaling & procedures for reducing NR positioning latency  p. 106

10.9  DL positioning measurement in RRC_IDLE state  p. 107

10.10  RAT-Independent positioning  p. 107

10.11  Signalling and procedures to support GNSS positioning integrity  p. 107

11  Conclusions  p. 107

A  Void

B  Appendix to summary of performance evaluations  p. 112

B.1  Evaluation of horizontal positioning accuracy with gNB/UE TX/RX timing error  p. 112

B.2  Evaluation of physical layer latency  p. 116

C  Appendix to Performance evaluations for R17 performance targets  p. 129

C.1  Performance analysis of Rel-16 positioning solutions  p. 129

C.2  Performance of studied NR positioning enhancements  p. 129

C.3  Efficiency analysis for NR positioning enhancements  p. 129

$  Change history  p. 130

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