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

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

Nov 22, 2023 304 likes •752 views

1 ECE8863 ECE8863 2 ECE8863 3 ECE8863 4 ECE8863 5 ECE8863 6 ECE8863 7 ECE8863 8 ECE8863 9 ECE8863 10 ECE8863 11 ECE8863 12 Deployment Scenario No of LTE-A component carriers Scenario Transmission BWs of Bands for LTE-A

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Scenario No. Deployment Scenario Transmission BWs of LTE-A carriers No of LTE-A component carriers Bands for LTE-A carriers Duplex modes A Single-band contiguous spec.

  • alloc. @ 3.5GHz band for FDD

UL: 40 MHz DL: 80 MHz UL: Contiguous 2x20 MHz CCs DL: Contiguous 4x20 MHz CCs 3.5 GHz band FDD B ¡ Single-band contiguous spec.

  • alloc. @ Band 40 for TDD

100 MHz ¡ Contiguous 5x20 MHz CCs ¡ Band 40 (2.3 GHz) TDD ¡ C Multi-band non-contiguous spec.

  • alloc. @ Band 1, 3 and 7 for FDD

UL: 40 MHz DL: 40 MHz UL/DL: Non-contiguous 10 MHz CC@Band 1 + 10 MHz CC@Band 3 + 20 MHz CC@Band 7 Band 3 (1.8 GHz) Band 1 (2.1 GHz) Band 7 (2.6 GHz) FDD D Multi-band non-contiguous spec.

  • alloc. @ Band 39, 34, and 40 for

TDD 90 MHz Non-contiguous 2x20 + 10 + 2x20 MHz CCs Band 39 (1.8GHz) Band 34 (2.1GHz) Band 40 (2.3GHz) TDD

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

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 Is there any clear

benefit compared to L1?

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 Rx Diversity (2 or 4 antennas)  Open-loop Tx Diversity with SFBC  Closed loop (PMI) 

Codebook-based precoding

 Only for one user

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 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

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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  Same resources are

used for each UE

 UE Sync to more than

  • ne cell and Network

Sync.

 Increased feedback

signaling

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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

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