A Novel Channel Allocation And Scheduling Algorithm In

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A Novel Channel Allocation And Scheduling Algorithm In

  1. 1. A Novel Channel Allocation and Scheduling Algorithm in OFDMA System 報告人 : J.SHOW 指導教授 : H.H.Liu 06/02/09
  2. 2. References <ul><li>Sungho Hwang and Ho-Shin Cho, </li></ul><ul><li>&quot;A Novel Channel Allocation and Scheduling Algorithm in OFDMA System,&quot; </li></ul><ul><li>IEEE 64ht Vehicular Technology Conference, Sept. 2006, page(s):1-5 </li></ul>06/02/09
  3. 3. Outline <ul><li>Introduction </li></ul><ul><ul><li>Permutation schemes </li></ul></ul><ul><li>System description </li></ul><ul><li>Algorithm </li></ul><ul><ul><li>Alternative vector </li></ul></ul><ul><ul><li>Jain index </li></ul></ul><ul><li>Numerical result </li></ul><ul><li>Conclusion </li></ul>06/02/09
  4. 4. Introduction <ul><li>Round Robin </li></ul><ul><li>Proportional fairness </li></ul><ul><li>This paper </li></ul><ul><ul><li>Sub-band divided into group </li></ul></ul><ul><ul><li>Alternative vector </li></ul></ul>Tk : average throughput Rk : arrival rate tc : control latency parameter K* : chosen user 06/02/09
  5. 5. Introduction(cont.) <ul><li>This paper AMC </li></ul><ul><li>(adaptive modulation and coding) </li></ul><ul><li>FUSC (full usage sub-channels) </li></ul><ul><li>PUSC (partial usage sub-channels) </li></ul>06/02/09
  6. 6. System description Cij :channel state of user j using sub-band i F : number of sub-band N : number of users 06/02/09
  7. 7. System description(cont.) 06/02/09
  8. 8. Algorithm <ul><li>Step 1 </li></ul><ul><ul><li>Sub-bands divided into different level group </li></ul></ul><ul><ul><li>Sub-bands alternative vector </li></ul></ul><ul><li>Step 2 </li></ul><ul><ul><li>Allocate users into sub-bands </li></ul></ul><ul><ul><li>Users alternative vector </li></ul></ul>06/02/09
  9. 9. Sub-band into Group G : group 06/02/09
  10. 10. Alternative vectors 06/02/09 Cij :channel state of user j using sub-band i F : number of sub-band N : number of users
  11. 11. Jain index (fairness) 06/02/09 N : total number of users Xi : transmitted data rate for user i I range : 0 ~ 1
  12. 12. Satisfaction parameter 06/02/09 Si : satisfaction parameter Rt_i : transmitted rate Rr_i : required data rate Use Si substituting Xi
  13. 13. Example 06/02/09
  14. 14. Sub-band && users allocation 06/02/09
  15. 15. Sub-bands && users allocation procedure 06/02/09
  16. 16. Numerical parameters <ul><li>10 sub-bands </li></ul><ul><li>10 TTIs(transmission time intervals ) per frame </li></ul><ul><li>9 AMC level </li></ul><ul><li>Channel gain : Rayleigh fading channel model </li></ul>06/02/09 <ul><li>: constant (Eb/No) </li></ul><ul><li>0 : SNR mean of 18dB </li></ul>
  17. 17. AMC level 06/02/09
  18. 18. Numerical result(throughput) 06/02/09
  19. 19. Numerical result(fairness) 06/02/09
  20. 20. Numerical result(satisfaction) 06/02/09
  21. 21. Conclusion <ul><li>AMC level </li></ul><ul><li>Alternative vector </li></ul><ul><ul><li>It is Simple </li></ul></ul><ul><ul><li>Used in both Sub-band && user </li></ul></ul><ul><li>Satisfaction parameter </li></ul>06/02/09

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