Content for TR 25.800 Word version: 12.1.0
5 Deployment scenarios
6 Aspects of heterogeneous networks
7 Solutions and techniques
8 Impact on specifications
9 Conclusion
A Performance evaluation methodology
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5 Deployment scenarios Word‑p. 12
6 Aspects of heterogeneous networks Word‑p. 14
6.1 Interference in co-channel scenario
6.1.1 Coverage issues Word‑p. 15
6.1.2 Uplink interference issues
6.1.3 Downlink interference issues Word‑p. 16
6.1.4 Strong mismatch zone
6.1.5 Uplink/Downlink imbalance issues Word‑p. 18
6.2 Mobility aspects Word‑p. 23
7 Solutions and techniques Word‑p. 25
7.1 Solutions for co-channel scenarios
7.1.1 Analysis of UL/DL mismatch
7.1.1.1 DL coverage boundary Word‑p. 26
7.1.1.2 UL coverage boundary
7.1.1.3 Matching the UL and DL coverage
7.1.2 Solutions for legacy terminals Word‑p. 28
7.1.3 Rel-12 enhancements Word‑p. 30
7.1.3.2 Introduction of secondary pilot Word‑p. 31
7.1.3.4 Dynamic power boosting
7.1.3.5 E-TFC selection backoff for uplink SI
7.1.3.6 E-DCH decoupling Word‑p. 32
7.1.3.6.1 Description of E-DCH decoupling operation
7.1.3.6.2 Evaluation of E-DCH decoupling Word‑p. 34
7.1.3.6.3 HSUPA DL control channels reliability with E-DCH decoupling Word‑p. 40
7.1.3.6.4 Conclusions for E-DCH decoupling Word‑p. 42
7.1.3.7 Enhanced inner-loop power control restriction
7.1.4 Evaluation of solutions for HS-DPCCH Word‑p. 43
7.1.4.1 Evaluation 1
7.1.4.2 Evaluation 2 Word‑p. 44
7.1.5 Evaluation of noise padding/desensitization Word‑p. 46
7.1.6 Solutions for the strong mismatch zone Word‑p. 50
7.1.6.1 Introduction of an extended active set
7.1.6.2 Common E-RGCH Word‑p. 51
7.1.6.3 Inter-Cell Interference Cancellation (ICIC) Word‑p. 52
7.1.6.4 UL throughput limitation for identified UEs Word‑p. 53
7.1.6.5 Carrier frequency switch for identified UEs
7.1.7 Performance evaluation of HetNet in co-channel scenarios Word‑p. 54
7.1.7.1 Downlink system performance
7.1.7.2 Uplink system performance Word‑p. 60
7.1.7.3 MIMO performance Word‑p. 61
7.1.8 Network Assisted Interference Cancellation (NAIC) Word‑p. 62
7.1.8.1 Interference Cancellation
7.1.8.2 Aspects of Network Assisted Interference Cancellation Word‑p. 63
7.1.8.2.1 Post-decoding IC, pre-decoding IC and Type 3i
7.1.8.2.2 Signalling of information for IC
7.1.8.2.3 Coordinated scheduling and Restricted Resources Subframe Word‑p. 64
7.1.8.3 Performance evaluation Word‑p. 65
7.1.8.3.1 Simulation results of successful decoding rate of the interfering signal Word‑p. 67
7.1.8.3.2 Post-decoding Interference Cancellation Word‑p. 68
7.1.8.3.3 System level simulation for post-decoding Word‑p. 73
7.1.8.3.4 Link level simulation results with Network Assisted Interference Cancellation
7.1.8.3.5 Link level simulations for RRS
7.2 Range expansion Word‑p. 76
7.2.1 Range expansion for co-channel deployments
7.2.1.1 Downlink control channel evaluation
7.2.1.1.1 Evaluation methodology
7.2.1.1.2 Evaluation of F-DPCH performance and impact on the uplink Word‑p. 78
7.2.1.1.3 Evaluation of E-HICH performance Word‑p. 83
7.2.1.1.4 Evaluation of HS-SCCH performance and impact on the downlink Word‑p. 88
7.2.1.1.5 Total power overhead for F-DPCH, E-HICH and HS-SCCH Word‑p. 95
7.2.1.1.6 Performance evaluation of F-DPCH transmitted from the non-serving LPN
7.2.1.1.7 Conclusion Word‑p. 97
7.2.1.2 Uplink system simulation results for range expansion
7.2.1.3 Downlink system simulation results with range expansion Word‑p. 99
7.2.2 Range expansion for multi-carrier deployments Word‑p. 101
7.2.2.1 Scenario 1: Macro cells and LPNs have only one shared carrier
7.2.2.2 Scenario 2: Macro cells and LPNs have two shared carriers
7.2.2.3 Dual-Frequency Dual-Cell (DF-DC) operation Word‑p. 103
7.2.2.4 Performance of Single Frequency Dual Cell scenario
7.2.2.5 Performance of Macro power reduction as an LPN range expansion technique Word‑p. 104
7.2.2.5.1 Interference limited system with full buffer traffic
7.2.2.5.2 Thermal noise limited system with full buffer traffic Word‑p. 106
7.2.2.5.3 Interference limited system with bursty traffic Word‑p. 108
7.2.2.5.4 Thermal noise limited system with bursty traffic Word‑p. 113
7.2.2.5.5 Performance in a mixed deployment scenario Word‑p. 116
7.2.2.5.6 Summary Word‑p. 119
7.2.3 Decentralised biasing
7.3 Combined cell Word‑p. 121
7.3.1 Motivation of combined cell deployments
7.3.2 Typical deployment scenarios and use cases Word‑p. 123
7.3.3 Transmission modes Word‑p. 124
7.3.4 System performance Word‑p. 125
7.3.4.1 Single Frequency Network Mode
7.3.4.2 Node selection with Spatial Reuse Mode Word‑p. 128
7.3.4.2.1 Solution I (using low power level probing pilots and demodulation pilots)
7.3.4.2.2 Solution II (using high power level demodulation pilots) Word‑p. 129
7.3.4.2.3 System simulation results for Solution I Word‑p. 130
7.3.4.2.4 System simulation results for Solution II Word‑p. 131
7.3.4.2.5 Link simulation results for Solution I and Solution II
7.3.4.2.6 Conclusions on performance of Spatial Reuse Mode Word‑p. 135
7.3.5 Legacy UE performance in combined cell
7.3.5.1 System level analysis Word‑p. 136
7.3.5.2 Link level analysis
7.3.5.3 Performance of legacy users with spatial reuse Word‑p. 137
7.3.5.4 System level analysis of legacy users with spatial reuse Word‑p. 139
7.3.5.5 Conclusions on legacy UE performance Word‑p. 142
7.3.5.6 IPICH based solution for combined cells Word‑p. 143
7.4 Mobility aspects Word‑p. 149
7.4.1 Solutions to small cell discovery and identification
7.4.2 Solutions to the mobility performance degradation caused by high UE speed Word‑p. 150
7.4.3 Solutions to the issues of massive deployment of small cells Word‑p. 152
7.4.4 Mobility aspects related with combined cell
7.4.5 Solutions to the issues of Multiflow and multi-carrier operation Word‑p. 153
8 Impact on specifications Word‑p. 154
9 Conclusion
A Performance evaluation methodology Word‑p. 157
A.1 System simulation assumptions
A.2 System performance evaluation metrics Word‑p. 160
A.3 Link simulation assumptions Word‑p. 161
A.4 Link performance evaluation metrics Word‑p. 162
A.5 Link simulation assumptions and metrics for modelling HS-DPCCH performance
A.6 Mobility simulation assumptions Word‑p. 163
A.7 Mobility simulation performance metrics Word‑p. 164
A.8 Mobility simulation results
A.9 Observations from the mobility simulation results
$ Change History Word‑p. 165
