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TR 37.857
Study on Indoor Positioning enhancements
for UTRA and LTE

3GPP‑Page
V13.1.0 (Wzip)  2016/01  82 p.
Rapporteur:
Mr. Vogedes, Jerome
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full Table of Contents for  TR 37.857  Word version:  13.1.0

1Scope  p. 6
2References  p. 6
3Definitions and abbreviations  p. 8
3.1Definitions  p. 8
3.2Abbreviations  p. 9
4 General description of indoor positioning for UTRA and LTE  p. 9
5Evaluation methodology for indoor positioning  p. 9
5.1System model for positioning  p. 9
5.1.1Evaluation scenarios  p. 9
5.1.2OTDOA assumptions and parameters  p. 13
5.1.3UTDOA assumptions and parameters  p. 14
5.1.4D2D aided positioning - assumptions and parameters  p. 14
5.2Performance metrics  p. 15
5.2.1Horizontal accuracy  p. 15
5.2.2Vertical accuracy  p. 15
6Baseline performance of existing positioning techniques in indoor environments  p. 15
6.1Simulation results for horizontal positioning accuracy  p. 15
6.1.1Case 1: Outdoor macro + outdoor small cell deployment scenarios  p. 16
6.1.1.1Case 1.A. Outdoor macro + 0 small cells  p. 16
6.1.1.2Case 1.B. Outdoor macro + 4 small cells  p. 18
6.1.1.3Case 1.C. Outdoor macro + 10 small cells  p. 20
6.1.2Case 2: Outdoor macro + indoor small cell deployment scenarios  p. 21
6.1.2.1Outdoor macro + dense small cells  p. 21
6.1.2.2Case 2a: Outdoor macro + sparse small cells  p. 23
6.1.3Summary for 50m Horizontal Error  p. 25
6.2Simulation results for vertical positioning accuracy  p. 26
6.2.1Case 1: Outdoor macro + outdoor small cell deployment scenarios  p. 26
6.2.1.1Case 1.A. Outdoor macro + 0 small cells  p. 26
6.2.1.2Case 1.B. Outdoor macro + 4 small cells  p. 27
6.2.1.3Case 1.C. Outdoor macro + 10 small cells  p. 29
6.2.2Case 2: Outdoor macro + indoor small cell deployment scenarios  p. 31
6.2.2.1Outdoor macro + dense small cells  p. 31
6.2.2.2Case 2a: Outdoor macro + sparse small cells  p. 34
7Studied positioning technology enhancements  p. 35
7.1RAT-dependent positioning technologies  p. 35
7.1.1OTDOA enhancements  p. 35
7.1.1.1Enhanced Positioning Reference Signals (PRS)  p. 36
7.1.1.1.1Randomization of frequency shift  p. 36
7.1.1.1.1.1Evaluation Results  p. 37
7.1.1.1.1.1.2Backward compatibility  p. 38
7.1.1.1.1.1.3Specification impacts  p. 39
7.1.1.1.2Subframe-based variation of frequency shift  p. 39
7.1.1.1.3Randomization of PRS muting pattern  p. 40
7.1.1.1.4PRS muting pattern  p. 40
7.1.1.1.5PRS backward compatibility (method 1)  p. 41
7.1.1.1.6PRS Backward capability (method 2)  p. 41
7.1.1.1.7Enhancements for the same PCI case (method 1)  p. 41
7.1.1.1.7.1 Evaluation results  p. 43
7.1.1.1.8Enhancements for the same PCI case (method-2)  p. 44
7.1.1.1.9Additional enhancements for the same PCI case (method 3)  p. 44
7.1.1.1.10Enhanced PRS using Tx antenna diversity  p. 44
7.1.1.1.11Positioning Reference Signals (PRS) in unlicensed bands  p. 45
7.1.1.1.12Dynamic PRS configuration adaptation  p. 45
7.1.1.1.13CRS together with PRS for RSTD measurements [48][49]  p. 45
7.1.1.1.14EB/FD-MIMO based positioning enhancement [50][51]  p. 46
7.1.1.2Enhanced RSTD measurements  p. 47
7.1.1.2.1UE inter-frequency RSTD calibration accuracy reporting  p. 47
7.1.1.2.2Reference cell selection improvements  p. 51
7.1.1.2.3PRS interference cancellation (IC) techniques  p. 54
7.1.1.3Enhanced RSTD reporting  p. 56
7.1.1.3.1Enhanced RSTD quantization and additional signalling support  p. 56
7.1.1.3.2Reduction of RSTD quantization error  p. 57
7.1.1.3.3Enhanced RSTD measurement quality report  p. 57
7.1.1.3.4RSTD report via RRC  p. 57
7.1.1.4Enhancements for wideband PRS [48][53][54]  p. 57
7.1.2D2D aided positioning  p. 60
7.1.2.1D2D Aided Positioning Scenarios  p. 60
7.1.2.2D2D aided positioning techniques  p. 60
7.1.2.3Potential Enhancements  p. 61
7.1.2.4Evaluation results for D2D aided positioning  p. 61
7.1.2.4.1D2D-aided positioning by proximity detection  p. 61
7.1.2.4.2D2D-aided positioning by multilateration  p. 63
7.1.3E-CID enhancements  p. 64
7.1.4Enhancement for UE Rx-Tx measurement over multiple serving cells  p. 64
7.2RAT-independent positioning technologies  p. 65
7.2.1Terrestrial beacon systems (TBS)  p. 65
7.2.1.1TBS evaluation scenarios  p. 65
7.2.1.2TBS configuration parameters  p. 67
7.2.1.3TBS simulation results  p. 67
7.2.1.4Summary for 50m horizontal error  p. 68
7.2.1.5Terrestrial beacon systems (TBS) impacts  p. 69
7.2.1.5.1Architecture impacts  p. 69
7.2.1.5.2Messaging/Protocol impacts  p. 69
7.2.1.5.3Requirements impact with TBS option 2  p. 71
7.2.1.5.4Requirements impact with TBS option 1  p. 71
7.2.1.5.5TBS option 2 coexistence  p. 71
7.2.2Wi-Fi/Bluetooth based positioning  p. 72
7.2.2.1 Fine timing measurements (FTM) for Wi-Fi aided positioning  p. 73
7.2.3Barometric pressure sensor positioning  p. 74
7.2.4Specification impacts for Wi-Fi, BT and barometric pressure sensor positioning  p. 75
7.2.4.1Information to be transferred between SMLC and UE  p. 75
7.2.4.2E-UTRAN specifications impact  p. 77
7.2.4.3UTRAN specifications impact  p. 79
7.2.5IMU sensor based positioning  p. 80
8Conclusions  p. 81
$Change History  p. 82

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