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Realize the Potential

Realize the Potential. Du Yinggang Huawei Wireless WCNC09, April 2009 Budapest Hungary. This is Huawei’s Headquarter (Shenzhen, China):. Questions from the title:. What’s the potential?. How to realize the potential?. What’s the potential: Application Aspects.

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Realize the Potential

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  1. Realize the Potential Du Yinggang Huawei Wireless WCNC09, April 2009 Budapest Hungary

  2. This is Huawei’s Headquarter (Shenzhen, China):

  3. Questions from the title: What’s the potential? How to realize the potential?

  4. What’s the potential: Application Aspects • In the latest Mobile World Congress in Barcelona in Feb. 2009, many possible applications are attracting our eye-balls: • Mobile Internet • Mobile Payment • Video • Location based service • 3D Piloting • 3D Games • ……

  5. What’s the potential: Technical Aspects • More and more data application and real-time application means: • Higher throughput • Wider bandwidth • Higher spectrum efficiency • Higher Cell-edge user throughput • Shorter latency

  6. Can we realize these potentials? YES, WE CAN!

  7. How to realize the potential: • Increase the spectrum efficiency within a cell in LTE-A: • Carrier Aggregation • Higher order MIMO: • 8T8R scenarios are considered in two direction: • UE is aware of 8T: spatial multiplexing gain can be achieved but with higher reference signal overhead • UE is only aware of 4T: The mapping from 8T(or even more transmit antennas) to 4T can be implemented via beamforming/precoding. • In both scenarios, channel reciprocity is possibly applied • SU MIMO supported in UL • Relay: to increase the coverage in cell-edge and/or improve throughput in hot spot. • CoMP • What’s CoMP?

  8. How to realize the potential: • Increase the spectrum efficiency among cells: • Interference among neighboring cells become a serious issue to limit the performance upgrade. • So-called CoMP(Co-Ordinate Multi-Point) transmission: • One eNB contains one or multi-cells • One cell contains one or multi-RRUs • One RRU contains one or multi-antennas

  9. How to realize the potential: • CoMP categories: • Joint Processing (JP): data is available at each point in CoMP cooperating set • Joint Transmission: PDSCH transmission from multiple points (part of or entire CoMP cooperating set) at a time • Dynamic cell seletion: PDSCH transmission from one point at a time (within CoMP cooperating set) • Coordinated Scheduling/Beamforming (CS/CB): data is only available at serving cell (data transmission from that point) but user scheduling/beamforming decisions are made with coordination among cells corresponding to the CoMP cooperating set.

  10. Cell Cell Cell Cell Cell Cell • Inter-cell SU-CoMP Inter-cell Inter-cell spaial multiplexing inter-cell diversity Inter-cell diversity/precoding • Inter-cell MU-CoMP Cell # Cell#1 Cell # Cell # Inter-cell spatial multiplexing Inter-cell spatial multiplexing and inter-cell diversity How to realize the potential: Intra-eNB CoMP - Inter-cell CoMP

  11. How to realize the potential: • The issues to be considered for CoMP: • Backhaul delay • Timing alignment • Reference Signal design • RRU/Cell selection/Handover • Feedback report by UE or allocation signaling by eNB • RRM

  12. How to realize the potential: • Impacts on LTE-A implementation • On UE • Higher complexity of UE receiver to support multi point reception • On eNB • eNB would control and support multiple cells • Joint point transmission and processing • Stronger Base band processing capacity • Enhanced eNB data transferring capacity among cells with low latency and high bandwidth • Multi-link CSI • More powerful backhaul

  13. With the potential realized, we can enjoy mobile service anywhere and anytime in our own way as our wish！

  14. －Thank You－ www.huawei.com

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