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Project’s Overview

Project’s Overview. Date : Thursday, March 24 th 2011 Alexandre Gouraud (Orange) Canada-EU Future Internet Workshop, Waterloo. Outline. ARTIST4G drivers Objectives Organisation Our research beyond LTE-A Dissemination Conclusion. ARTIST4G Drivers.

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Project’s Overview

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  1. Project’s Overview Date: Thursday, March 24th2011 Alexandre Gouraud (Orange) Canada-EU Future Internet Workshop, Waterloo Advanced Radio InterfaceTechnologIes for 4G SysTems

  2. Outline • ARTIST4G drivers • Objectives • Organisation • Our research beyond LTE-A • Dissemination • Conclusion

  3. ARTIST4G Drivers • Explosion of mobile data traffic due to demanding applications • Operator economic boundaries • An even more uniform Quality of Service • Building on LTE / LTE-advanced current state of the art

  4. Objectives and Concepts • Reduce the discrepancies between cell-edge and cell center performances • Either via densification • Or in limiting the interferences

  5. Project Organisation (1/2) Innovation activities: main research directions Transversal supporting activities WP1 Interference avoidance WP2 Interference exploitation WP3 Advanced Relay Concepts WP0 Management WP4 Architectural Impacts on RAN WP5 Requirements and evaluation WP6 Lab and field trials Advanced Radio InterfaceTechnologIes for 4G SysTems

  6. Project Organisation (2/2) WP2 1200 mm WP3 WP1 WP4 WP6 WP5 WP0

  7. EASY-C Test Bed Re-used in ARTIST4G Milestones: - Sept 2011: End of implementations - June 2012: Demonstration

  8. A Group of Partners Gathering Required Skills Chalmers University of Technology

  9. Our Research Beyond LTE-A • Some examples illustrating our research directions • Channel prediction • Coordinated Multi-Point transmission (CoMP) • 3D beamforming • Interference cancelling receivers (not strictly LTE-A standardisation related as it relates to receiver design) • Advanced relays

  10. Advanced Channel Prediction LTE-A ARTIST4G • Channel measurement • Used in many techniques • SU/MU-MIMO • Beamforming • SDMA • Link Adaptation • Accuracy limited by feedback overhead • Traditional prediction: Kalman or Wiener filter • Limited prediction horizon • Fail in birth-death of multipath components • New scheme: model-based • 3D location + moving vector • Real world study: • Using LTE Test-bed • Promising results although complex in term of processing

  11. Coordinated Multi-Point (CoMP) • Study item stopped in R10 • Not included in LTE R10 • Technology not mature enough • Study Item R11 LTE-A ARTIST4G • A few eNB may jointly contribute to serve a UE • Potential to make capacity more smooth and movable to where users are • Coordinate and collaborate over multiple ’cells’ for macro-diversityandinterference avoidance

  12. 3D-Beamforming LTE-A ARTIST4G • This concept is not part of LTE R10 • Conventional fixed down-tilt causes interference • Objective: exploit also elevation dimension • Ground breaking innovation

  13. Interference Cancelling • Full orthogonality provides interference avoidance • But known to be suboptimal in terms of capacity • Cancelling residual interference increases the capacity through resource re-use • But interference is not always easy to estimate • Controlling and structuring the interference opens ways to maximum capacity • Optimality relies in a trade-off between interference avoidance and exploitation • WP2 works on interference cancellation receiver using iterative algorithm (turbo principle) • various functions in the receiver collaborate (e.g. channel estimator, decoder) to extract the information

  14. Advanced Relays • The relay standardized in LTE-A has the full eNB functionalities • can be seen as an eNodeB with a wireless backhaul operating in LTE spectrum • Expected benefits • Reduced cost: no backhaul, low-cost device • Easy and quick to deploy (no backhaul, small, low-power) • Foreseen main scenario: coverage enhancement LTE-A features ARTIST4G innovations • Advanced relays need to provide capacity in addition to coverage • CoMP on the relay feeder link. • Multi-hop relays • Moving relays

  15. Toward a more uniform QoS • Target Peak/Average performances • From release to release, average over cell-edge ratio of throughput increases LTE-A ARTIST4G • Focus on a more uniform Qos • Use a new performance indicator: • Jain index applied on User throughput distribution • Adopted by 3GPP

  16. Dissemination • Web site at : https://ict-artist4g.eu • Publications in conferences and magazines • 3journal papers • ~ 20 conferences articles in 2010 • ~15 papers in 2009 (before ARTIST4G) • A 3GPP contribution on CoMP • A press release • 2 issues of the Newsletter (available online)

  17. Thank you ! Questions?

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