Content for TR 38.835 Word version: 18.0.1
1…
4…
5…
6
A
B…
B.1.2
B.1.3
B.1.4
B.1.5
B.1.6
B.1.7
B.1.8
B.1.9
B.1.10
B.2…
B.2.2
B.2.3
B.2.4
B.2.5
B.2.6
B.2.7
B.2.8
B.2.9
B.2.10
B.2.11
B.2.12
B.2.13
B.2.14
B.2.15
B.2.16
B.2.17
B.2.18
C…
B.2.12 Enhancements to PDCCH skipping indication p. 106
This clause captures evaluation results for various enhancements for the PDCCH skipping indications:
- Huawei and vivo evaluated the adaptive PDCCH skipping duration until the earliest possible arrival time of the next frame, i.e., the next jitter boundary position.
- Xiaomi evaluated PDCCH skipping with four skipping durations.
- CATT evaluated PDCCH skipping by introducing the go-to-sleep indication for UE transition to the sleep state immediately.
- Ericsson compared two cases by evaluations when CDRX is configured with: i) Rel-17 PDCCH skipping with two durations only; ii) or enhanced PDCCH skipping with arbitrary skipping duration covering the remaining DRX active time.
| source | data row index | Tdoc source | Power saving scheme | CDRX cycle (ms) | ODT (ms) | IAT (ms) | Load H/L | #UE /cell | floor (Capacity) | % of DL satisfied UE | % of UL satisfied UE | % of DL + UL satisfied UE | Capacity gain (%) | Mean PSG of all UEs (%) | Mean PSG of satisfied UEs (%) | Additional Assumptions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ericsson | 1 | R1-2208401 | Always On | - | - | - | H | 8 | 8 | - | - | 90.1% | 0.0% | 0.0% | 0.0% | Note1 |
| Ericsson | 7 | R1-2208401 | R17 PDCCH skipping & matched CDRX | 16.6 | 10 | 4 | H | 8 | 8 | 72.2% | -19.9% | 10.5% | 10.4% | Note1,2,4 | ||
| Ericsson | 8 | R1-2208401 | Enhanced PDCCH skipping & matched CDRX | 16.6 | 10 | 4 | H | 8 | 8 | 72.4% | -19.6% | 10.5% | 10.5% | Note1, 3,4 | ||
| Ericsson | R1-2208401 | Always On | - | - | - | L | 2 | 8 | - | - | 99.5% | 0.0% | 0.0% | 0.0% | Note1 | |
| Ericsson | 15 | R1-2208401 | R17 PDCCH skipping & matched CDRX | 16.6 | 10 | 4 | L | 2 | 8 | 96.6% | -2.9% | 11.2% | 11.9% | Note1,2,4 | ||
| Ericsson | 16 | R1-2208401 | Enhanced PDCCH skipping & matched CDRX | 16.6 | 10 | 4 | L | 2 | 8 | 97.3% | -2.2% | 11.2% | 12.0% | Note1, 3,4 | ||
|
NOTE 1:
the DL traffic has a second flow for audio with 30ms PDB
NOTE 2:
two possible PDCCH skipping periods 5 & 10ms
NOTE 3:
UE skips the remaining DRX active time
NOTE 4:
Matched CDRX has (drx_offset=3, traffic_time_offset=2 ms, drx-LongCycle=16 ms)
|
||||||||||||||||
Based on the evaluation results in Table B.2.12-1, the following observations can be made:
-
For FR1, DL + UL joint evaluation, DU, DRX configured, VR 30Mbps traffic at 60fps with 10ms PDB and DL audio, it is observed from Ericsson that:
-
Rel-17 PDCCH skipping with two durations as performance reference provides:
- For high load, power saving gain of 10.4% and capacity gain of -19.9%
- For low load, power saving gain of 11.2% and capacity gain of -2.9%
-
enhanced PDCCH skipping with arbitrary skipping duration covering the remaining DRX active time provides:
- For high load, power saving gain of 10.5% and capacity gain of -19.6%
- For low load, power saving gain of 11.2% and capacity gain of -2.2%
-
Rel-17 PDCCH skipping with two durations as performance reference provides:
| source | data row index | Tdoc source | Power saving scheme | CDRX cycle (ms) | ODT (ms) | IAT (ms) | Load H/L | #UE /cell | floor (Capacity) | % of satisfied UE | Capacity gain (%) | Mean PSG of all UEs (%) | Mean PSG of satisfied UEs (%) | Additional Assumptions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Huawei | 1 | R1-2210906 | Always On | - | - | - | H | 11 | 11 | 93.42% | 0.0% | 0.0% | - | |
| Huawei | 10 | R1-2210906 | Rel-17 PDCCH Skipping | - | - | - | H | 11 | 11 | 93.42% | 0.0% | 12.12% | - | Note 1 |
| Huawei | 11 | R1-2210906 | Rel-17 PDCCH Skipping | - | - | - | H | 11 | 11 | 93.42% | 0.0% | 11.15% | - | Note 2 |
| Huawei | 12 | R1-2210906 | PDCCH skipping with adaptive duration | - | - | - | H | 11 | 11 | 93.42% | 0.0% | 18.35% | - | Note 3 |
|
NOTE 1:
Set of PDCCH skipping duration is {5, 10, 15}ms
NOTE 2:
Set of PDCCH skipping duration is {4, 16, 29}ms
NOTE 3:
UE skips PDCCH monitoring until the earliest possible arrival time of next frame
|
||||||||||||||
Based on the evaluation results in Table B.2.12-2, the following observations can be made:
-
For FR1, DL-only evaluation, DU, DRX not configured, high load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from Huawei that:
-
PDCCH skipping with adaptive duration provides:
- power saving gain of 18.35%
- capacity gain of 0.00%
-
R17 PDCCH skipping performance reference provides:
- mean power saving gain of 11.64% in the range of 11.15% to 12.12% and
- capacity gain of 0.00%
-
PDCCH skipping with adaptive duration provides:
| source | data row index | Tdoc source | Power saving scheme | CDRX cycle (ms) | ODT (ms) | IAT (ms) | Load H/L | #UE /cell | floor (Capacity) | % of satisfied UE | Capacity gain (%) | Mean PSG of all UEs (%) | Mean PSG of satisfied UEs (%) | Additional Assumptions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Xiaomi | 1 | R1-2211341 | AlwaysOn | - | - | - | H | 3 | 3 | 97% | 0.0% | - | 0.0% | |
| Xiaomi | 2 | R1-2211341 | Rel-17 PDCCH skipping | - | - | - | H | 3 | 3 | 95% | -2.1% | - | 41.74% | Note 1 |
| Xiaomi | 3 | R1-2211341 | PDCCH skipping enhancement | - | - | - | H | 3 | 3 | 96% | -1.0% | - | 47.40% | Note 2 |
|
NOTE 1:
PDCCH skipping with 2 candidate durations(8/10ms)
NOTE 2:
PDCCH skipping with 4 candidate durations(6/8/10/12ms)
|
||||||||||||||
Based on the evaluation results in Table B.2.12-3, the following observations can be made:
-
For FR1, DL-only evaluation, DU, DRX not configured, high load, VR 45Mbps traffic at 60fps with 10ms PDB, it is observed from Xiaomi that:
-
Rel-17 PDCCH skipping with 2 candidate durations as performance reference provides:
- power saving gain of 41.74%
- capacity gain of -2.1%
-
PDCCH skipping enhancement with 4 candidate durations provides:
- power saving gain of 47.40% for all UEs
- capacity gain of -1.0%
-
Rel-17 PDCCH skipping with 2 candidate durations as performance reference provides:
| source | data row index | Tdoc source | Power saving scheme | CDRX cycle (ms) | ODT (ms) | IAT (ms) | Load H/L | #UE /cell | floor (Capacity) | % of satisfied UE | Capacity gain (%) | Mean PSG of all UEs (%) | Mean PSG of satisfied UEs (%) | Additional Assumptions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CATT | 1 | R1-2211174 | Baseline: DG scheduling and UE always-on | - | - | - | H | 12 | 12 | 95.8% | 0.0% | 0.0% | 0.0% | |
| CATT | 2 | R1-2211174 | DG scheduling with C-DRX | 16 | 12 | 4 | H | 12 | 12 | 90.0% | -6.1% | 8.0% | 8.0% | |
| CATT | 7 | R1-2211174 | PDCCH skipping enhancement (Go-to-sleep) | 16 | 12 | 4 | H | 12 | 12 | 90.00% | -6.1% | 24.0% | 24.4% | |
| CATT | 7 | R1-2211174 | PDCCH skipping enhancement (Go-to-sleep) | 16 | 12 | 4 | H | 12 | 12 | 90.00% | -6.1% | 17.4% | 17.8% | Note1 |
| vivo | R1-2211024 | Always On | - | - | - | L | 5 | 10 | 100% | 0.0% | 0.0% | - | ||
| vivo | R1-2211024 | R17 PDCCH monitoring adaptation | - | - | - | L | 5 | 10 | 100% | 0.0% | 6.93% | - | Note2,4 | |
| vivo | R1-2211024 | R17 PDCCH monitoring adaptation | - | - | - | L | 5 | 10 | 100% | 0.0% | 18.18% | - | Note2,3,4 | |
| vivo | R1-2211024 | Enhanced PDCCH skipping | - | - | - | L | 5 | 10 | 100% | 0.0% | 12.06% | - | Note2,5 | |
| vivo | R1-2211024 | Enhanced PDCCH skipping | - | - | - | L | 5 | 10 | 100% | 0.0% | 23.36% | - | Note2,3,5 | |
| vivo | R1-2211024 | Always On | - | - | - | H | 10 | 10 | 92.50% | 0.0% | 0.0% | - | ||
| vivo | R1-2211024 | R17 PDCCH monitoring adaptation | - | - | - | H | 10 | 10 | 92.28% | -0.2% | 5.66% | - | Note2,4 | |
| vivo | R1-2211024 | R17 PDCCH monitoring adaptation | - | - | - | H | 10 | 10 | 92.22% | -0.3% | 14.25% | - | Note2,3,4 | |
| vivo | R1-2211024 | Enhanced PDCCH skipping | - | - | - | H | 10 | 10 | 92.30% | -0.2% | 10.46% | - | Note2,5 | |
| vivo | R1-2211024 | Enhanced PDCCH skipping | - | - | - | H | 10 | 10 | 92.22% | -0.3% | 19.28% | - | Note2,3,5 | |
|
NOTE 1:
PSG is calculated w.r.t. DG scheduling with C-DRX
NOTE 2:
PDCCH skipping is indicated in the DCI that schedules a dummy PDSCH after all the HARQ-ACK processes of transmissions have been completed
NOTE 3:
applying R17 sparse SSSG with PDCCH monitoring every 2 slots before XR traffic burst arrives and switch to dense SSSG with PDCCH monitoring every 1 slot after detecting DCI scheduling XR traffic burst
NOTE 4:
with [6ms, 4ms, 2ms] candidate skipping durations
NOTE 5:
one-shot skipping to the next jitter boundary position
|
||||||||||||||
Based on the evaluation results in Table B.2.12-4, the following observations can be made:
-
For FR1, DL-only evaluation, InH, high load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from CATT that:
-
go-to-sleep based on PDCCH skipping enhancement provides:
- power saving gain of 24.0% for all UEs
- capacity gain of -6.1%
-
DG scheduling with C-DRX which provides:
- power saving gain of 8.0%
- capacity gain of -6.1%
-
go-to-sleep based on PDCCH skipping enhancement provides:
-
For FR1, DL-only evaluation, InH, low load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from vivo that:
-
enhanced PDCCH skipping provides:
- mean power saving gain of 17.71% in the range of 12.06% to 23.36%
- mean capacity gain of 0.00%
-
R17 PDCCH monitoring provides:
- mean power saving gain of 12.56% in the range of 6.93% to 18.18%
- mean capacity gain of 0.00%
-
enhanced PDCCH skipping provides:
-
For FR1, DL-only evaluation, InH, high load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from vivo that:
-
enhanced PDCCH skipping provides:
- mean power saving gain of 14.87% in the range of 10.46% to 19.28%
- mean capacity gain of -0.25% in the range of -0.3% to -0.2%
-
R17 PDCCH monitoring provides:
- mean power saving gain of 9.96% in the range of 5.66% to 14.25%
- mean capacity gain of -0.25% in the range of -0.3% to -0.2%
-
enhanced PDCCH skipping provides:
