Realize the Potential Du Yinggang Huawei Wireless WCNC

Realize the Potential Du Yinggang Huawei Wireless WCNC 09, April 2009 www. huawei. com Budapest Hungary HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential

This is Huawei’s Headquarter (Shenzhen, China): HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

Questions from the title: What’s the potential? How to realize the potential? HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

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 3 D Piloting 3 D Games …… HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

What’s the potential: Technical Aspects • More and more data application and real-time application means: § Higher throughput q q q Wider bandwidth Higher spectrum efficiency Higher Cell-edge user throughput § Shorter latency HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

Can we realize these potentials? YES, WE CAN! HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

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

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 Co. MP(Co. Ordinate Multi-Point) transmission: q q q One e. NB contains one or multi-cells One cell contains one or multi -RRUs One RRU contains one or multi-antennas HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

How to realize the potential: • Co. MP categories: § Joint Processing (JP): data is available at each point in Co. MP cooperating set q q Joint Transmission: PDSCH transmission from multiple points (part of or entire Co. MP cooperating set) at a time Dynamic cell seletion: PDSCH transmission from one point at a time (within Co. MP 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 Co. MP cooperating set. HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

How to realize the potential: Intra-e. NB Co. MP - Inter-cell Co. MP Cell • Cell Cell Inter-cell SU-Co. MP Inter-cell diversity/precoding Cell # • Cell # Inter-cell spaial multiplexing inter-cell diversity Cell#1 Cell # Inter-cell MU-Co. MP Inter-cell spatial multiplexing HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Inter-cell spatial multiplexing and inter-cell diversity Page

How to realize the potential: • The issues to be considered for Co. MP: § § § Backhaul delay Timing alignment Reference Signal design RRU/Cell selection/Handover Feedback report by UE or allocation signaling by e. NB § RRM HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

How to realize the potential: • Impacts on LTE-A implementation § On UE q Higher complexity of UE receiver to support multi point reception § On e. NB q e. NB would control and support multiple cells – Joint point transmission and processing – Stronger Base band processing capacity – Enhanced e. NB data transferring capacity among cells with low latency and high bandwidth – Multi-link CSI q More powerful backhaul HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

With the potential realized, we can enjoy mobile service anywhere and anytime in our own way as our wish！ HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page

－Thank You－ www. huawei. com HUAWEI TECHNOLOGIES CO. , LTD. Huawei Confidential Page