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Content for  TR 38.835  Word version:  18.0.1

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B.2.14 SSSG switching enhancements 
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B.2.14  SSSG switching enhancements  p. 111

This clause captures evaluation results for enhancements to SSSG switching:
  • Ericsson evaluated enhanced SSSG switching based on (a) an implicit SSSG with sparse PDCCH monitoring applies at the start of drx-OnDuration and another SSSG with dense PDCCH monitoring in every time slot applies when a PDCCH for data traffic is received, (b) align the search space set monitoring pattern w.r.t. the DRX cycle.
sourcedata row indexTdoc sourcePower saving schemeCDRX cycle (ms)ODT (ms)IAT (ms)Load H/L#UE /cellfloor (Capa­city)% of DL satis­fied UE% of UL satis­fied UE% of DL + UL satis­fied UECapa­city gain (%)Mean PSG of all UEs (%)Mean PSG of satis­fied UEs (%)Addi­tional Assump­tions
Ericsson35R1-2210922Always On---H88--90.1%0.0%0.0%0.0%Note 1
Ericsson41R1-2210922R17 SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104H88--66.0%-26.7%10.3%10.3%Note 1,2
Ericsson42R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104H88--79.8%-11.4%10.7%10.7%Note 1,2
Ericsson43R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104H88--79.9%-11.3%11.3%11.2%Note 1,2
Ericsson48R1-2210922Enhanced SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104H88--80.0%-11.2%9.7%9.7%Note 1,2
Ericsson49R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104H88--79.5%-11.8%11.5%11.5%Note 1,2
Ericsson50R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104H88--78.7%-12.7%12.2%12.1%Note 1,2
NOTE 1:
the DL traffic has a second flow for audio with 30ms PDB
NOTE 2:
Matched CDRX has (drx_offset=3, traffic_time_offset=2 ms, drx-LongCycle=16 ms)
Based on the evaluation results in Table B.2.14-1, the following observations can be made:
  • For FR1, DL + UL joint evaluation, DU, VR 30Mbps traffic at 60fps with 10ms PDB and DL audio, it is observed from Ericsson that:
    • R17 SSSG switching performance reference provides:
      • mean power saving gain of 10.50% in the range of 10.3% to 10.7%
      • mean capacity gain of -19.05% in the range of -26.7% to -11.4%
    • enhanced SSSG switching provides:
      • mean power saving gain of 10.60% in the range of 9.7% to 11.5% for all UEs
      • mean capacity gain of -11.5% in the range of -11.8% to -11.2%
    • R17 SSSG switching + PDCCH skipping performance reference provides:
      • power saving gain of 11.3%
      • capacity gain of -11.3%
    • enhanced SSSG switching + PDCCH skipping provides:
      • mean power saving gain of 12.2%
      • capacity gain of -12.7%
sourcedata row indexTdoc sourcePower saving schemeCDRX cycle (ms)ODT (ms)IAT (ms)Load H/L#UE /cellfloor (Capa­city)% of satis­fied UECapa­city gain (%)Mean PSG of all UEs (%)Mean PSG of satis­fied UEs (%)Addi­tional Assump­tions
Ericsson1R1-2210922Always On---H8891.7%0.0%0.0%0.0%
Ericsson7R1-2210922R17 SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104H8853.9%-41.2%15.5%16.0%Note 1
Ericsson8R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104H8878.4%-14.5%16.4%16.5%Note 1
Ericsson9R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104H8878.9%-14.0%20.2%20.4%Note 1
Ericsson14R1-2210922Enhanced SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104H8877.8%-15.2%15.2%15.5%Note 1
Ericsson15R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104H8877.8%-15.2%17.1%17.2%Note 1
Ericsson16R1-2210922Enhanced SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & PDCCH skipping & matched CDRX16.6104H8878.7%-14.2%18.0%18.2%Note 1
Ericsson17R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104H8878.1%-14.8%20.7%20.9%Note 1
Ericsson18R1-2210922Always On---L28100%0.0%0%0%
Ericsson24R1-2210922R17 SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104L2882.9%-17.1%18.2%18.2%Note 1
Ericsson25R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104L28100%0.0%19.2%19.2%Note 1
Ericsson23R1-2210922R17 SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104L28100%0.0%26.6%26.6%Note 1
Ericsson31R1-2210922Enhanced SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & matched CDRX16.6104L28100%0.0%17.3%17.3%Note 1
Ericsson32R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & matched CDRX16.6104L28100%0.0%19.3%19.3%Note 1
Ericsson33R1-2210922Enhanced SSSG switching (sparse SSSG: 2 ms on / 2 ms off) & PDCCH skipping & matched CDRX16.6104L28100%0.0%23.5%23.5%Note 1
Ericsson34R1-2210922Enhanced SSSG switching (sparse SSSG: 1 ms on / 1 ms off) & PDCCH skipping & matched CDRX16.6104L28100%0.0%27.1%27.1%Note 1
NOTE 1:
Matched CDRX has (drx_offset=3, traffic_time_offset=2 ms, drx-LongCycle=16 ms)
Based on the evaluation results in Table B.2.14-2, the following observations can be made:
  • For FR1, DL only evaluation, DU, high load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from Ericsson that:
    • enhanced SSSG switching provides:
      • mean power saving gain of 16.15% in the range of 15.2% to 17.1% for all UEs
      • capacity gain of -15.2%
    • R17 SSSG switching performance reference provides:
      • mean power saving gain of 15.95% in the range of 15.5% to 16.4%
      • mean capacity gain of -27.85% in the range of -41.2% to -14.5%
    • enhanced SSSG switching + PDCCH skipping provides:
      • mean power saving gain of 19.35% in the range of 18.0% to 20.7%
      • mean capacity gain of -14.5% in the range of -14.8% to -14.2%
    • R17 SSSG switching + PDCCH skipping performance reference provides:
      • power saving gain of 20.2%
      • capacity gain of -14.0%
  • For FR1, DL only evaluation, DU, low load, VR 30Mbps traffic at 60fps with 10ms PDB, it is observed from Ericsson that:
    • enhanced SSSG switching provides:
      • mean power saving gain of 18.30% in the range of 17.3% to 19.3% for all UEs
      • capacity gain of 0%
    • R17 SSSG switching performance reference provides:
      • mean power saving gain of 18.7% in the range of 18.2% to 19.2%
      • mean capacity gain of -8.6% in the range of -17.1% to 0%
    • enhanced SSSG switching + PDCCH skipping provides:
      • mean power saving gain of 25.30% in the range of 23.50% to 27.10%
      • capacity gain of 0%
    • R17 SSSG switching + PDCCH skipping performance reference provides:
      • power saving gain of 26.6%
      • capacity gain of 0%
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