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PERMUTATION

PERMUTATION. Evaluation Scenarios. BW = 10 MHz, N PRU = 48 (N 1 = 4, N 2 = 1). Scenario1 (Mixed Reuse 1&3 – equal size). Scenario 3 (Reuse 1). Scenario 2 (Mixed Reuse 1&3 – unequal size). Scenario 4 (Reuse 3). Evaluation Criteria Description. Diversity gain for distributed resources

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PERMUTATION

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  1. PERMUTATION

  2. Evaluation Scenarios BW = 10 MHz, NPRU = 48 (N1 = 4, N2 = 1) Scenario1 (Mixed Reuse 1&3 – equal size) Scenario 3 (Reuse 1) Scenario 2 (Mixed Reuse 1&3 – unequal size) Scenario 4 (Reuse 3)

  3. Evaluation Criteria Description • Diversity gain for distributed resources • Calculate the equivalent SNR of each LRU and plot the histogram • Find 10% outage SNR, i.e, the SNR value which can be achieved with outage 0.1. • Scheduling gain for contiguous resources • Calculate the equivalent SNR of each LRU and select the best LRU for each FFR. Plot the histogram of the best SNR. • Find 10% outage SNR, i.e, the (best) SNR value which can be achieved with outage 0.1. • Hit ratio for distributed resources • Average number of subcarrier pairs hit by neighboring cell.

  4. DL Permutation Demonstration Model DLRU: Distributed LRU

  5. Part IComparison of Subband Partitioning and Miniband Permutation Proposals

  6. Comparison of Subband Partitioning and Miniband Permutations • Compare Intel1, Intel2, LGE, Samsung, Motorola • Same subcarrier perm used for all proposals • perm_seq() israndom permutation • Shift by symbol and subframe index according to Intel’s formula.

  7. Study 1: 10% SNR Values Scenario1 (Mixed Reuse 1&3 – equal size) Scenario 3 (Reuse 1) Scenario 2 (Mixed Reuse 1&3 – unequal size) Scenario 4 (Reuse 3)

  8. Diversity and scheduling gain in Scenario 1

  9. Diversity and scheduling gain in Scenario 2

  10. Diversity and scheduling gain in Scenario 3

  11. Diversity and scheduling gain in Scenario 4

  12. Conclusions of Part I • Proposals from Intel (1&2), LGE, and Samsung have the best performance in terms of diversity and scheduling gain.

  13. Part IIComparison of Subcarrier Permutation Proposals

  14. Comparison of Subcarrier Permutation Proposals • Compare subcarrier permutation proposed by Intel, LGE, Samsung, and random permutation • Use Intel1 SB partitioning and Intel MB permutation • Random permutation: PermSeq is random, shifted over symbols and subframes according to Intel’s formula. • Calculate diversity gain for different subcarrier perms for Scenarios 1, 2, and 3.

  15. Diversity gain: 10% SNR Values Scenario1 (Mixed Reuse 1&3 – equal size) Scenario 3 (Reuse 1) Scenario 2 (Mixed Reuse 1&3 – unequal size)

  16. Diversity gain in Scenario 1

  17. Diversity gain in Scenario 2

  18. Diversity gain in Scenario 3

  19. Conclusions of Part II • Subcarrier permutation methods proposed by Intel and Samsung have the best diversity gain.

  20. Part IIIComparison of Average Hit Number

  21. DL Hit Number Comparison • Compare the number of hits among different Cell ID pairs for the subcarrier permutations proposed by Intel, Samsung and LGE. • 0≤Cell_ID <512, 130816 Cell_ID Pairs • Intel • PermSeq remains the same for all cells. • Samsung and LTE: • Different PermSeq for different cells: • LGE: different shift as function of Cell_ID • Samsung: different SEED as function of Cell_ID

  22. Hit Number Comparison • k: number of subcarrier pairs hit within an LRU, • (0 ≤ k ≤ kmax and kmax = Nsym*Lpair = 48) • Calculate the fraction of LRUs hit at k≥12 subcarrier pairs (25%) Reuse 1, NPRU = 48

  23. Conclusions of Part III • For small number of DRU Intel’s subcarrier permutation has the best performance. • Intel and LGE’s subcarrier permutations have the best performance for large number of DRUs.

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