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Coordinated Multipoint Communications in Heterogeneous Networks

Coordinated Multipoint Communications in Heterogeneous Networks. Yiye Chen Supervisor : Prof. Jyri Hämäläinen Instructor : Beneyam B. Haile MSc . in Communications Engineering Aalto University. Agenda. Background and Motivation Simulation Deployment Scenario Evaluation Results

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Coordinated Multipoint Communications in Heterogeneous Networks

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  1. Coordinated Multipoint Communications in Heterogeneous Networks Yiye Chen Supervisor : Prof. JyriHämäläinen Instructor : Beneyam B. Haile MSc. in Communications Engineering Aalto University

  2. Agenda Background and Motivation SimulationDeploymentScenario Evaluation Results Conclusion Futurework

  3. Background & Motivation • 3GPP release 11: • Heterogeneous Network(HetNet) • Coordinated Multipoint(CoMP) Escalated Cellular Service Requirements: High data rate Spectral efficiency per unit area Uniform user experience Coverage expansion Enlarge capacity

  4. Background & Motivation

  5. Background & Motivation • Coordinated Multipoint(CoMP)

  6. Background & Motivation • Literatures and field trials about CoMP between macro cells • In 3GPP Rel-11, mixed CoMP between macro BSs and remote radio heads(RRH) is evaluated and documented. Objectives of this Thesis • Evaluate CoMP with Matlab in HetNet between small cell and macro cell • Develop the CoMP UE selection Criterion to benefit throughput of system and manage RBs allocation • Evaluate CoMP under other scnarios Previous Contribution:

  7. SimulationDeploymentScenario Network Layout

  8. SimulationDeploymentScenario CoMP UE Selection Criteria: Criterion I: < Rx Power Threshold Criterion II: < Rx Power Threshold : The strongest Rx power of signal from macro cell. : The strongest Rx power of signal from small cell.

  9. Evaluation Results 1. Result with different Received power threshold (Criterion I) Figure: Throughput Gain Figure: SINR Gain

  10. Evaluation Results 2. Result with Criterion II Figure: Throughput Gain Figure: CDF plot of Thourhgput

  11. Evaluation Results 3. Result with different density of UEs in small cell

  12. Evaluation Results 4. Result with random locations of small cells Network Layout

  13. Evaluation Results 4. Result with random locations of small cells Figure: Throughput Gain Figure: SINR Gain

  14. Conclusion • Conventional CoMP UE Selection Criterion does not fit Round-Robin scheduling algorithm. • With an improved CoMP UE Selection Criterion, CoMP merely between macro cell and small cell brings about over maximum 70% for QCP and 40% for DPS/DPB average throughput gain on cell edge UEs. • Higher density of UEs near small cell leads to more throughput gain. • Randomly locate small cells within macro cells may lose some throughput gain, but CoMP is still worthy to be deployed under this case.

  15. Future work • Simulation about uplink CoMP between macro cell and small cell in HetNet. • Modified simulators with non-ideal backhaul to make scenario closer to the reality

  16. Thankyou!

  17. SimulationDeploymentScenario Modified Round Robin Scheduling : Number of CoMP UEs for a macro cell. : Number of Non-CoMP UE served by macro cell. /: Number of CoMP/Non-CoMP UEs for a small cell. //: Bandwidth of CoMP/Macro-cell/Small-cell UE.

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