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Outline. Introduction Background Activities in TSG-C WG3 EMAH for performance evaluation of UMB system Calibration process among companies Simulation conditions for UMB performance evaluation Simulation results Conclusion Appendix: Examples of link level simulation results

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  1. Outline • Introduction • Background • Activities in TSG-C WG3 EMAH for performance evaluation of UMB system • Calibration process among companies • Simulation conditions for UMB performance evaluation • Simulation results • Conclusion • Appendix: • Examples of link level simulation results • System level simulation results for calibration • Backup slides for simulation results under NGMN setup

  2. Introduction • Standardization of UMB system • March 2006 to February 2007: Decision of framework and components • April, 2007: Publication of UMB Air Interface Specification Version 1.0 • May to August, 2007: Revision of UMB Air Interface Specification • September, 2007: Publication of UMB Air Interface Specification Version 2.0 However, UMB characterization has not been completed yet … Necessity of Performance evaluation for UMB system!

  3. Background (1)~ History on Activities for Performance Evaluation of UMB ~ • History: • June, 2007: agreed upon to start UMB characterization • July to August, 2007: preparatory work (e.g. outline of simulation setting, parameters, timeline) • August to December, 2007: Calibration of link curves • December 2007 until now: Calibration of system level simulation results

  4. Background (2)~ Calibration Processes for UMB Performance Evaluation ~ • Link level simulations: • From Aug., 2007, each company began to provide simulation results • Oct, 2007: confirmed that three companies (Samsung, Huawei, and KDDI) were aligned • Nov. to Dec., 2007: another two companies (Qualcomm and Alcatel-Lucent) were also aligned with the three companies Appendix A: examples of link level simulation results

  5. Background (3)~ Calibration Processes for UMB Performance Evaluation ~ • System level simulations: • From Dec., 2007, companies (KDDI, Samsung, Nortel, Qualcomm, Huawei, and Alcatel-Lucent) began to provide simulation results • In total, five rounds have been performed for calibration among companies so far • March, 2008: confirmed that all the companies involved in the calibration (KDDI, Samsung, Nortel, Qualcomm, and Huawei) were aligned on the full-buffer traffic model in the forward link (FL-FB) • April, 2008: confirmed that all the companies involved in the calibration were aligned on the VoIP traffic model in the forward link (FL-VoIP) • Up to now: most of the companies have been aligned in the remaining simulation scenarios as follows • Full-buffer traffic model in the reverse link (RL-FB) • VoIP traffic model in the reverse link (RL-FB) • Full-buffer traffic model in the forward link with MIMO (FL-MIMO) Appendix B: examples of system level simulation results

  6. Toward UMB Performance Evaluation • For the purpose of calibrations among companies, we use a set of simplified simulation models such as • Simplified power control model compared to the UMB air interface specification • No power control in the forward link • No rank adaptation in the FL-MIMO simulations • Etc. • This presentation provides actual performances both • taking account of the realistic scenarios as in above and • using simulation parameters in the NGMN’s evaluation methodology document

  7. Simulation Parameters

  8. Simulation Conditions for Full Queue Traffic Model • System bandwidth – 992 subcarriers over 10MHz • Overhead • Guard band – 32 subcarriers • CP - 6.51 us • Control overhead – 6 tiles (96 subcarriers) in FL with 10% power overhead, one CDMA subsegment (128 subcarriers) every 8 frames and 2 tiles (32 subcarriers) for R-ACKCH every frame • Superframe preamble – one out of 26 frames (3.85%) • Scheduler – Equal resource scheduler (similar to proportional fair) • Power control – No power control for FL. OSI-based power control for RL with DataCtoI range [-3dB,10dB] and IoTtarget 7.5dB • Antenna configurations • SIMO1x2 for FL and RL • MIMO2x2 with precoding (64 precoding matrices used) and rank selection for FL

  9. ~ Full Queue Traffic Model ~ Simulation Results • Forward link (Downlink) • Reverse link (Uplink)

  10. Simulation Conditions for VoIP Traffic Model • System bandwidth – 480 subcarriers over 5MHz • Overhead • Guard band – 32 subcarriers • CP - 6.51 us • Control overhead – 4 tiles (64 subcarriers) in FL with 26% power overhead, 160 subcarriers in RL, including one CDMA subsegment (128 subcarriers) and 2 tiles (32 subcarriers) for R-ACKCH • Superframe preamble – one out of 26 frames (3.85%) • Power control – Target termination based power control. • Antenna configurations – SIMO1x2 for FL and RL

  11. ~ VoIP Traffic Model ~ Simulation Results • Forward link (Downlink) * Since the VoIP system is RL limited, though the FL VoIP capacity is far more than 350, we did not simulate to find the actual number. • Reverse link (Uplink)

  12. Conclusions • This contribution summarizes activities in TSG-C WG3 EMAH for UMB characterization • Calibration of both link- and system-level simulations has been almost completed • UMB performance results are provided using NGMN simulation conditions.

  13. References [1] 3GPP2, “Ultra Mobile Broadband (UMB) Air Interface Specification,” C.S0084-000~009 v.2.0, Sep. 2007. [2] NGMN Alliance, “NGMN Performance Evaluation Methodology” Version 1.2, June 2007.

  14. Appendix A ~ Examples of link level simulation results ~

  15. Link level results (1) • FL, BRCH, 8 tiles, PF#10 H: Huawei S: Samsung K: KDDI Q: Qualcomm A: Alcatel-Lucent AV: Averaged values

  16. Link level results (2) • RL, 1 tiles, PF#5 H: Huawei S: Samsung K: KDDI Q: Qualcomm A: Alcatel-Lucent AV: Averaged values

  17. Appendix B ~ System level simulation results for calibration~

  18. System level simulation results (1)~ FL, Full-buffer Traffic, Ped-B w/ 3km/h ~

  19. System level simulation results (2) ~ FL, VoIP Traffic, Ped-B w/ 3km/h ~

  20. System level simulation results (3) ~ RL, VoIP Traffic, Ped-B w/ 3km/h ~

  21. Appendix C ~ Backup slides for simulation results under NGMN setup~

  22. ~ Full Queue Traffic Model ~ Simulation Results (1)

  23. ~ Full Queue Traffic Model ~ Simulation Results (2)

  24. ~ Full Queue Traffic Model ~ Simulation Results (2)

  25. ~ VoIP Traffic Model ~ Simulation Results (1)

  26. ~ VoIP Traffic Model ~ Simulation Results (2)

  27. ~ VoIP Traffic Model ~ Simulation Results (2)

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