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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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evaluation scenarios
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)

evaluation criteria description
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.
comparison of subband partitioning and miniband permutations
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.
study 1 10 snr values
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)

conclusions of part i
Conclusions of Part I
  • Proposals from Intel (1&2), LGE, and Samsung have the best performance in terms of diversity and scheduling gain.
comparison of subcarrier permutation proposals
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.
diversity gain 10 snr values
Diversity gain: 10% SNR Values

Scenario1 (Mixed Reuse 1&3 – equal size)

Scenario 3 (Reuse 1)

Scenario 2 (Mixed Reuse 1&3 – unequal size)

conclusions of part ii
Conclusions of Part II
  • Subcarrier permutation methods proposed by Intel and Samsung have the best diversity gain.
dl hit number comparison
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
hit number compari son
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

conclusions of part iii
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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