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Content for
TR 36.839
Word version: 11.1.0
1…
2…
2
References
3
Definitions, symbols and abbreviations
4
General
5
HetNet mobility performance evaluation
6
Strategies for improved small cell discovery/identification
7
Automatic Re-establishment procedures for mobility robustness
8
Mobility enhancements for Multi-Carrier (including CA) in HeNBs with potentially different CSGs
9
Overall observations from the study on HetNet mobility
A
Detailed evaluation results on potential enhancements for inter-frequency small cell measurements
$
Change history
2
References
3
Definitions, symbols and abbreviations
Word‑p. 6
3.1
Definitions
3.2
Symbols
3.3
Abbreviations
Word‑p. 7
4
General
5
HetNet mobility performance evaluation
5.1
Simulation study phases
5.2
General Simulation assumptions
Word‑p. 8
5.2.1
Handover Failure Modelling
5.2.1.1
Definition of Handover states
5.2.1.2
RLF modelling and definition of RLF states
5.2.1.3
Handover/PDCCH failure modelling
5.2.2
Ping-pong Modelling
Word‑p. 11
5.2.3
Typical Radio Parameter Configurations
Word‑p. 12
5.2.4
HetNet mobility specific parameters
Word‑p. 13
5.2.5
Modelling of additional features
Word‑p. 14
5.3
Specific assumptions for Hotspot simulation
5.3.1
UE Placement and Trajectories for hotspot simulation
5.3.2
Additional Simulation assumptions for Hotspot calibration
Word‑p. 15
5.4
Additional assumptions for large area system simulations
5.4.1
Improved HO failure and RLF modelling
5.4.2
Handover performance metrics for HetNet large area evaluation
Word‑p. 16
5.4.3
The Definition of Short-ToS Rate
Word‑p. 17
5.4.4
UE Placement and Trajectories and cell placement for large area simulation
5.4.5
Additional Simulation assumptions for Large area calibration
Word‑p. 18
5.4.5.1
UE Placement and Trajectories and cell placement for large area simulation calibration
5.5
Simulation results
Word‑p. 19
5.5.1
Hotspot calibration
5.5.1.1
RLF results discussion
5.5.1.2
HO failures results discussion
Word‑p. 21
5.5.1.3
Ping-pong results discussion
Word‑p. 23
5.5.2
Large area calibration
5.5.2.1
RLF performance for HetNet and legacy systems
Word‑p. 24
5.5.2.2
Handover failure performance for HetNet and legacy systems
Word‑p. 25
5.5.2.3
Short Time of Stay performance
Word‑p. 26
5.5.3
Overall observations from calibration simulations
Word‑p. 28
5.5.4
Multiple picocell deployments
5.5.4.1
Multiple picocell deployment under full system load
5.5.4.1.1
Observations from Multiple picocell deployment simulations under full system load
Word‑p. 30
5.5.4.2
Multiple picocell deployment under constant system load
5.5.4.2.1
Observations from Multiple picocell deployment simulations under constant system load
5.5.5
Performance with DRX
5.5.5.1
Simulation study for Handover and RLF performance with DRX for HetNet relative to macro only systems
5.5.5.1.1
Simulation assumptions and definitions
5.5.5.1.2
Simulation results with DRX for HetNet relative to macro only systems
Word‑p. 31
5.5.5.2
Simulation study for Handover and RLF performance with DRX for different HO types in HetNet
Word‑p. 33
5.5.5.2.1
Simulation assumptions and definitions
5.5.5.2.2
Simulation results with DRX for different HO types in HetNet
Word‑p. 36
5.5.5.3
Overall observations on Handover performance in HetNet with DRX
Word‑p. 38
5.5.6
Performance with eICIC
5.5.6.1
Simulation assumptions
Word‑p. 39
5.5.6.2
Simulation results
5.5.6.3
Conclusions on mobility performance with eICIC
Word‑p. 42
5.6
Performance benefits of enhanced UE mobility state estimation
5.6.1
Mobility speed estimation
5.6.2
Overall observations on Mobility speed estimation
Word‑p. 44
6
Strategies for improved small cell discovery/identification
6.1
Deployment scenarios
6.2
Objectives for inter-frequency small cell measurements
Word‑p. 45
6.3
Analysis of existing inter-frequency measurements
6.4
Potential enhancements for improved small cell discovery/identification
Word‑p. 46
6.4.1
Solution 1: Longer measurement period [20]
6.4.3
Solution 9: UE MSE based measurements [21,32]
6.4.4
Solution 10: Small cell signal based control of measurements [22]
6.4.5
Solution 4: Measurements without gap assistance [23]
6.4.6
Solution 2: Small cell discovery signal in macro layer [24]
6.4.7
Solution 6: UE based proximity detection [25, 33]
6.4.8
Solution 5/ 7: Proximity detection based on macro/pico cell listening [26, 27]
6.4.9
Solution 8: Proximity detection with broadcast assistance [28, 33]
Word‑p. 47
6.5
Evaluation results
7
Automatic Re-establishment procedures for mobility robustness
Word‑p. 48
8
Mobility enhancements for Multi-Carrier (including CA) in HeNBs with potentially different CSGs
9
Overall observations from the study on HetNet mobility
A
Detailed evaluation results on potential enhancements for inter-frequency small cell measurements
Word‑p. 50
$
Change history
Word‑p. 53