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TR 36.878
Study on Performance enhancements
for High Speed Scenario in LTE

3GPP‑Page
V13.0.0 (Wzip)  2016/01  92 p.
Rapporteur:
Mr. Han, Jing
Huawei Technologies France

full Table of Contents for  TR 36.878  Word version:  13.0.0

1Scope  p. 6
2References  p. 6
3Definitions, symbols and abbreviations  p. 6
3.1Definitions  p. 6
3.2Symbols  p. 7
3.3Abbreviations  p. 7
4Introduction  p. 8
4.1Study item objective  p. 8
5RRM and demodulation requirements enhancements under existing high speed scenario  p. 9
5.1General  p. 9
5.2RRM requirements enhancements under existing high speed scenario  p. 10
5.2.1Simulation assumptions  p. 10
5.2.2Performance characterization  p. 13
5.2.2.1RLM  p. 13
5.2.2.1.1Simulation Results  p. 13
5.2.2.1.2Summary  p. 14
5.2.2.2RSRP/RSRQ measurement accuracy  p. 14
5.2.2.2.1Simulation results  p. 14
5.2.2.2.2Summary  p. 18
5.2.2.3Cell identification  p. 18
5.2.2.3.1Simulation results  p. 18
5.2.2.3.2Summary  p. 19
5.3UE Demodulation requirements enhancements under existing high speed scenario  p. 19
5.3.1Simulation assumptions  p. 20
5.3.2Performance characterization  p. 21
5.3.2.1Simulation results of PDSCH under the existing high speed scenario  p. 21
5.3.2.2Summary of evaluation  p. 25
5.4BS Demodulation requirements enhancements under existing high speed scenario  p. 26
5.4.1Simulation assumptions  p. 26
5.4.2Performance characterization  p. 26
5.4.2.1Limiting factors for high speed performance  p. 26
5.4.2.1.1ICI  p. 26
5.4.2.1.2Doppler tracking and channel estimation performance  p. 28
5.4.2.2Simulation results of PUSCH under the existing high speed scenario  p. 28
5.4.2.3Summary of evaluation  p. 32
6RRM and demodulation requirements enhancements under identified high speed scenarios  p. 32
6.1General  p. 32
6.2Identified Scenarios  p. 32
6.2.1Proposed scenarios  p. 32
6.2.2Scenario summary  p. 34
6.2.3Possible new channel models  p. 35
6.2.3.1SFN scenario (RRH sharing the same cell id)  p. 35
6.2.3.2Leaky cable in Tunnel (from leaky cable to repeater)  p. 37
6.3RRM requirements enhancements under identified high speed scenarios  p. 38
6.3.1Simulation assumptions  p. 38
6.3.1.1SFN scenarios  p. 38
6.3.1.1.1RLM  p. 38
6.3.1.1.2RSRP/RSRQ accuracy  p. 39
6.3.1.2Leaky cable (1st hop of scenario 2c)  p. 40
6.3.1.2.1RLM  p. 40
6.3.1.2.2RSRP/RSRQ accuracy  p. 41
6.3.1.2.3Cell identification  p. 41
6.3.2Performance characterization  p. 43
6.3.2.1SFN scenarios  p. 43
6.3.2.1.1RLM  p. 43
6.3.2.1.2RSRP/RSRQ accuracy  p. 44
6.3.2.2Leaky cable (1st hop of scenario 2c)  p. 47
6.3.2.2.1RLM  p. 47
6.3.2.2.2RSRP/RSRQ accuracy  p. 49
6.3.2.2.3Cell identification  p. 51
6.3.3Possible essential enhancement options  p. 52
6.3.4Other issues and possible options  p. 52
6.4Downlink performance enhancements under identified high speed scenarios  p. 53
6.4.1Simulation assumptions  p. 53
6.4.2Performance characterization  p. 54
6.4.2.1SFN scenario (RRH sharing the same cell id)  p. 54
6.4.2.2Leaky cable in tunnel  p. 62
6.4.2.3Summary of evaluation  p. 63
6.4.3Possible essential enhancement options  p. 63
6.4.3.1Advanced receiver in high speed scenario  p. 63
6.4.3.2BS frequency pre-compensation  p. 64
6.4.3.3Unidirectional SFN scenario  p. 65
6.4.3.3.1Unidirectional SFN scenario (RRHs sharing the same cell id, beams aligned in same direction)  p. 66
6.4.3.3.2Simulation assumptions for Unidirectional SFN  p. 73
6.4.3.3.3Performance characterization of the Unidirectional SFN scenario  p. 74
6.4.3.4HST RRH with distributed orthogonal antenna ports (DOAP)  p. 77
6.5Uplink performance enhancements under identified high speed scenarios  p. 78
6.5.1Simulation assumptions  p. 78
6.5.2Performance characterization  p. 79
6.5.2.1SFN scenario (RRH sharing the same cell id)  p. 79
6.5.2.1.1PUSCH/PUCCH analysis  p. 79
6.5.2.1.2PRACH analysis  p. 79
6.5.2.2Leaky cable in tunnel  p. 82
6.5.2.3Summary of evaluation and analysis  p. 83
6.5.3Possible essential enhancement options  p. 83
6.5.3.1A new restricted set of cyclic shifts for extra high speed cells  p. 83
6.5.3.2Unidirectional RRH arrangement  p. 84
6.5.3.2.1Uplink characteristics in Unidirectional RRH arrangement  p. 84
7Conclusions  p. 88
AMobility in Unidirectional SFN Deployment  p. 89
A.1Mobility in Unidirectional SFN Deployment  p. 89
$Change History  p. 91

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