Content for TR 38.835 Word version: 18.0.1
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B.1.9 UL delay-aware scheduling p. 43
This clause captures the capacity performance evaluation results of enhancements related to UL delay aware scheduling.
The performance proportional fair scheduling (scheme 9.1 in Table B.1.9-1) has been compared against delay-aware scheduling. Particularly, the following schemes have been evaluated:
- Scheme 9.1: Proportional fair (PF) scheduling, where gNB uses PF scheduling, i.e., the scheduling priority of each user is calculated as the ratio of the instantaneous data rate over the historical data rate. The gNB does not consider delay during scheduling.
- Scheme 9.2: Delay-aware scheduling, where gNB is not aware of the exact UL data arrival time and can only apply SR or BSR reception time for delay-aware scheduling.
- Scheme 9.3: Delay-aware scheduling, where gNB is aware of the exact data arrival time and uses the exact data arrival time for delay-aware scheduling.
| Source | Tdoc Source | Scheme | TDD format | SU/MU-MIMO | Data rate (Mbps) | PDB (ms) | Capacity (UEs/cell) | C1=floor (Capacity) | % of satisfied UEs when #UEs/cell = C1 | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Source [Huawei] | R1-2210907 | 9.1 | DDDSU | MU-MIMO | 10 | 15 | 3 | 3 | 90 | Note 1, 2 |
| Source [Huawei] | R1-2210907 | 9.2 | DDDSU | MU-MIMO | 10 | 15 | 3.2 | 3 | 90.5 | Note 1, 2 |
| Source [Huawei] | R1-2210907 | 9.3 | DDDSU | MU-MIMO | 10 | 15 | 3.8 | 3 | 91.5 | Note 1, 2 |
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NOTE 1:
BS antenna parameters: 64TxRUs, (M, N, P, Mg, Ng; Mp, Np) = (8,8,2,1,1:4,8)
NOTE 2:
SR/BSR periodicity = 5 ms
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Based on the evaluation results in Table B.1.9-1 the following observations can be made:
- For FR1, DU, UL, with 100MHz bandwidth for AR single-stream traffic model, 10Mbps, 15ms PDB, 60 FPS, with MU-MIMO and 64TxRU, it is observed from Source [Huawei] that the capacity is increased from 3 UEs per cell with proportional fair scheduling to 3.2 UEs per cell with delay-aware scheduling, where gNB is not aware of the exact data arrival time (capacity gain is 7%).
- For FR1, DU, UL, with 100MHz bandwidth for AR single-stream traffic model, 10Mbps, 15ms PDB, 60 FPS, with MU-MIMO and 64TxRU, it is observed from Source [Huawei] that the capacity is increased from 3.2 UEs per cell with delay-aware scheduling, where gNB is not aware of the exact data arrival time to 3.8 UEs per cell with delay-aware scheduling, where gNB is aware of the exact data arrival time (capacity gain is 19%).
