ECE8863 ECE8863 2 ECE8863 3 ECE8863 4 ECE8863 5 ECE8863 6 - PowerPoint PPT Presentation

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Deployment Scenario No of LTE-A component carriers Scenario Transmission BWs of Bands for LTE-A Duplex No. LTE-A carriers carriers modes UL: 40 MHz UL: Contiguous 2x20 MHz CCs A Single-band contiguous spec. 3.5 GHz band FDD alloc. @ 3.5GHz band for FDD DL: 80 MHz DL: Contiguous 4x20 MHz CCs Single-band contiguous spec. Band 40 (2.3 GHz) B ¡ 100 MHz ¡ Contiguous 5x20 MHz CCs ¡ TDD ¡ alloc. @ Band 40 for TDD UL: 40 MHz UL/DL: Non-contiguous 10 MHz Band 3 (1.8 GHz) C Multi-band non-contiguous spec. FDD alloc. @ Band 1, 3 and 7 for FDD CC@Band 1 + 10 MHz CC@Band 3 + 20 Band 1 (2.1 GHz) DL: 40 MHz MHz CC@Band 7 Band 7 (2.6 GHz) Multi-band non-contiguous spec. Band 39 (1.8GHz) D 90 MHz Non-contiguous 2x20 + 10 + 2x20 MHz TDD CCs alloc. @ Band 39, 34, and 40 for Band 34 (2.1GHz) TDD Band 40 (2.3GHz) ECE8863 13

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What is the optimum number of relays? What is the optimum location/ layout? What is the optimum transmission/reception schedules with UE/BSs? What type of relay What is the optimum/maximum should be used in number of hops? => multi-hop different scenarios? relay ECE8863 28

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 Is there any clear benefit compared to L1? ECE8863 30

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 Only for one user  Rx Diversity (2 or 4 antennas)  Open-loop Tx Diversity with SFBC  Closed loop (PMI)  Codebook-based precoding ECE8863

 Accomodation of demand for higher data and wider coverage by switching scheme: • SU-MIMO for high peak rates • MU-MIMO for average rate enhancement • Collaborative MIMO for cell edge user data rate boost ECE8863 35

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 Downlink  Leverage throughput through SMUX.  Network MIMO & Collaborative MIMO  Network MIMO for DL only in TDD mode  For FDD: collaborative+MU MIMO+SU MIMO  UE Sync to more than  Same resources are one cell and Network used for each UE Sync.  Increased feedback signaling ECE8863

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 Coordinated scheduling/beamforming  Dynamic multi-site scheduling Coordinated precoder design and beam allocation  Each payload data transmitted only from one cell  No carrier phase coherence requirement  No impact on radio; only X2 interface ECE8863

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