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Content for  TR 36.878  Word version:  13.0.0

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2 References  3 Definitions, symbols and abbreviations  4 Introduction  5 RRM and demodulation requirements enhancements under existing high speed scenario  6 RRM and demodulation requirements enhancements under identified high speed scenarios  7 Conclusions  A Mobility in Unidirectional SFN Deployment  $ Change History 

 

2  References

3  Definitions, symbols and abbreviations

3.1  Definitions

3.2  Symbols  Word‑p. 7

3.3  Abbreviations

4  Introduction  Word‑p. 8

4.1  Study item objective

5  RRM and demodulation requirements enhancements under existing high speed scenario  Word‑p. 9

5.1  General

5.2  RRM requirements enhancements under existing high speed scenario  Word‑p. 10

5.2.1  Simulation assumptions

5.2.2  Performance characterization  Word‑p. 13

5.2.2.1  RLM

5.2.2.1.1  Simulation Results
5.2.2.1.2  Summary  Word‑p. 14

5.2.2.2  RSRP/RSRQ measurement accuracy

5.2.2.2.1  Simulation results
5.2.2.2.2  Summary  Word‑p. 18

5.2.2.3  Cell identification

5.2.2.3.1  Simulation results
5.2.2.3.2  Summary  Word‑p. 19

5.3  UE Demodulation requirements enhancements under existing high speed scenario

5.3.1  Simulation assumptions  Word‑p. 20

5.3.2  Performance characterization  Word‑p. 21

5.3.2.1  Simulation results of PDSCH under the existing high speed scenario

5.3.2.2  Summary of evaluation  Word‑p. 25

5.4  BS Demodulation requirements enhancements under existing high speed scenario  Word‑p. 26

5.4.1  Simulation assumptions

5.4.2  Performance characterization

5.4.2.1  Limiting factors for high speed performance

5.4.2.1.1  ICI
5.4.2.1.2  Doppler tracking and channel estimation performance  Word‑p. 28

5.4.2.2  Simulation results of PUSCH under the existing high speed scenario

5.4.2.3  Summary of evaluation  Word‑p. 32

6  RRM and demodulation requirements enhancements under identified high speed scenarios

6.1  General

6.2  Identified Scenarios

6.2.1  Proposed scenarios

6.2.2  Scenario summary  Word‑p. 34

6.2.3  Possible new channel models  Word‑p. 35

6.2.3.1  SFN scenario (RRH sharing the same cell id)

6.2.3.2  Leaky cable in Tunnel (from leaky cable to repeater)  Word‑p. 37

6.3  RRM requirements enhancements under identified high speed scenarios  Word‑p. 38

6.3.1  Simulation assumptions

6.3.1.1  SFN scenarios

6.3.1.1.1  RLM
6.3.1.1.2  RSRP/RSRQ accuracy  Word‑p. 39

6.3.1.2  Leaky cable (1st hop of scenario 2c)  Word‑p. 40

6.3.1.2.1  RLM
6.3.1.2.2  RSRP/RSRQ accuracy  Word‑p. 41
6.3.1.2.3  Cell identification

6.3.2  Performance characterization  Word‑p. 43

6.3.2.1  SFN scenarios

6.3.2.1.1  RLM
6.3.2.1.2  RSRP/RSRQ accuracy  Word‑p. 44

6.3.2.2  Leaky cable (1st hop of scenario 2c)  Word‑p. 47

6.3.2.2.1  RLM
6.3.2.2.2  RSRP/RSRQ accuracy  Word‑p. 49
6.3.2.2.3  Cell identification  Word‑p. 51

6.3.3  Possible essential enhancement options  Word‑p. 52

6.3.4  Other issues and possible options

6.4  Downlink performance enhancements under identified high speed scenarios  Word‑p. 53

6.4.1  Simulation assumptions

6.4.2  Performance characterization  Word‑p. 54

6.4.2.1  SFN scenario (RRH sharing the same cell id)

6.4.2.2  Leaky cable in tunnel  Word‑p. 62

6.4.2.3  Summary of evaluation  Word‑p. 63

6.4.3  Possible essential enhancement options

6.4.3.1  Advanced receiver in high speed scenario

6.4.3.2  BS frequency pre-compensation  Word‑p. 64

6.4.3.3  Unidirectional SFN scenario  Word‑p. 65

6.4.3.3.1  Unidirectional SFN scenario (RRHs sharing the same cell id, beams aligned in same direction)  Word‑p. 66
6.4.3.3.2  Simulation assumptions for Unidirectional SFN  Word‑p. 73
6.4.3.3.3  Performance characterization of the Unidirectional SFN scenario  Word‑p. 74

6.4.3.4  HST RRH with distributed orthogonal antenna ports (DOAP)  Word‑p. 77

6.5  Uplink performance enhancements under identified high speed scenarios  Word‑p. 78

6.5.1  Simulation assumptions

6.5.2  Performance characterization  Word‑p. 79

6.5.2.1  SFN scenario (RRH sharing the same cell id)

6.5.2.1.1  PUSCH/PUCCH analysis
6.5.2.1.2  PRACH analysis

6.5.2.2  Leaky cable in tunnel  Word‑p. 82

6.5.2.3  Summary of evaluation and analysis  Word‑p. 83

6.5.3  Possible essential enhancement options

6.5.3.1  A new restricted set of cyclic shifts for extra high speed cells

6.5.3.2  Unidirectional RRH arrangement  Word‑p. 84

6.5.3.2.1  Uplink characteristics in Unidirectional RRH arrangement

7  Conclusions  Word‑p. 88

A  Mobility in Unidirectional SFN Deployment  Word‑p. 89

A.1  Mobility in Unidirectional SFN Deployment

$  Change History  Word‑p. 91

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