hs scch codes
TRANSCRIPT
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HS-SCCH codes: 3 Versus 4
A trial has been completed to
estimate the gain or loss whenimplementing HS-SCCH=3 & 4
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Summary
The trial was conducted on 2 sites :
F1128: low load site
F1415: high load site
The change from HS-SCCH =4 to 3 was
implemented on July 26th
We observe a significant gain in HS throughput in
case of high load site in both cell and user levels
Only the KPIs with relevant variation will be
described in next slides
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4 users/TTI disabled
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DT results
CELL ID # of Attemps HSDPA AVG HSDPA MAX HSDPA AVG HSDPA MAX
1128A 1 13.4 Mbps 20.3 Mbps 14.8 Mbps 24.1 Mbps
1128A2
12.3 Mbps 18.7 Mbps 13.5 Mbps 22.1 Mbps1128A 3 12.9 Mbps 18.1 Mbps 15.4 Mbps 26.2 Mbps
1128A 4 13.0 Mbps 16.9 Mbps 14.4 Mbps 24.3 Mbps
1128A 5 13.4 Mbps 19.6 Mbps 15.5 Mbps 27.5 Mbps
1128A 6 15.1 Mbps 21.4 Mbps 16.0 Mbps 30.1 Mbps
1128A 7 12.5 Mbps 19.3 Mbps 15.4 Mbps 21.0 Mbps
1128A 8 14.1 Mbps 19.0 Mbps 15.1 Mbps 22.4 Mbps
1128A 9 12.5 Mbps 17.7 Mbps 14.6 Mbps 26.7 Mbps
1128A 10 12.3 Mbps 17.1 Mbps 14.7 Mbps 23.2 Mbps
1128 B 1 13.2Mbps
18.9Mbps
14.9Mbps
24.7Mbps
1128 B 2 12.2 Mbps 22.4 Mbps 14.2 Mbps 24.1 Mbps
1128 B 3 14.5 Mbps 34.8 Mbps 19.5 Mbps 42.6 Mbps
1128 B 4 14.5 Mbps 22.5 Mbps 14.9 Mbps 20.1 Mbps
1128 B 5 15.0 Mbps 21.1 Mbps 16.5 Mbps 24.5 Mbps
1128 B 6 12.0 Mbps 21.5 Mbps 13.3 Mbps 21.6 Mbps
1128 B 7 13.9 Mbps 20.3 Mbps 16.7 Mbps 26.6 Mbps
1128 B 8 13.1 Mbps 19.4 Mbps 17.0 Mbps 23.5 Mbps
1128 B 9 12.9 Mbps 21.4 Mbps 16.7 Mbps 28.8 Mbps
1128 B10
15.1Mbps
22.2Mbps
19.3Mbps
24.8Mbps
1128 C 1 12.2 Mbps 17.7 Mbps 15.3 Mbps 25.4 Mbps
1128 C 2 15.4 Mbps 23.2 Mbps 15.3 Mbps 25.7 Mbps
1128 C 3 12.3 Mbps 21.3 Mbps 14.5 Mbps 22.6 Mbps
1128 C 4 14.9 Mbps 21.9 Mbps 14.7 Mbps 23.9 Mbps
1128 C 5 15.3 Mbps 19.9Mbps 15.1 Mbps 22.4Mbps1128 C 6 17.1 Mbps 24.0 Mbps 14.7 Mbps 22.6 Mbps
1128 C 7 16.3 Mbps 21.5 Mbps 15.6 Mbps 25.5 Mbps
1128 C 8 14.5 Mbps 21.5 Mbps 15.6 Mbps 23.9 Mbps
1128 C 915.5 Mbps 20.0 Mbps 15.1 Mbps 25.6 Mbps
1128 C 10 17.1 Mbps 22.7 Mbps 15.7 Mbps 22.2 Mbps
Before Implement Changes After Implement Changes
Before After
13.11 15.02
Before After
13.64 16.03
Before After
15.06 15.16
Average
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DT resultsCELL ID # of Attemps HSDPA AVG HSDPA MAX HSDPA AVG HSDPA MAX
1415 A 1 2.1 Mbps 3.4 Mbps 16.2 Mbps 34.1 Mbps
1415 A 2 16.9 Mbps 23.9 Mbps
1415 A 3 18.5 Mbps 28.0 Mbps1415 A 4 18.1 Mbps 27.2 Mbps
1415 A 5 17.8 Mbps 30.0 Mbps
1415 A 6 15.5 Mbps 22.2 Mbps
1415 A 7 16.0 Mbps 22.8 Mbps
1415 A 8 15.7 Mbps 18.5 Mbps
1415 A 9 14.0 Mbps 21.3 Mbps
1415 A 10 17.7 Mbps 23.4 Mbps
1415 B 1 3.3 Mbps 4.7 Mbps 16.2 Mbps 34.1 Mbps
1415 B 2 16.9 Mbps 23.9 Mbps
1415 B 3 18.5 Mbps 28.0 Mbps
1415 B 4 18.1 Mbps 27.2 Mbps
1415 B 5 17.8 Mbps 30.0 Mbps
1415 B 6 15.5 Mbps 22.2 Mbps
1415 B 7 16.0 Mbps 22.8 Mbps
1415 B 8 15.7 Mbps 18.5 Mbps
1415 B 9 14.0 Mbps 21.3 Mbps
1415 B 10 17.7 Mbps 23.4 Mbps1415 C 1 2.5 Mbps 4.0 Mbps 12.4 Mbps 31.7 Mbps
1415 C 2 21.1 Mbps 30.8 Mbps
1415 C 3 20.0 Mbps 34.3 Mbps
1415 C 4 20.6 Mbps 30.3 Mbps
1415 C 5 21.0 Mbps 31.6 Mbps
1415 C 6 21.5 Mbps 27.0 Mbps
1415 C 7 20.0 Mbps 26.6 Mbps
1415 C 8 17.2 Mbps 30.9 Mbps
1415 C 9 14.3 Mbps 27.2 Mbps1415 C 10 16.0 Mbps 26.9 Mbps
Before Implement Changes After Implement Changes
Before After
2.1 16.64
Before After
2.1 18.41
Average
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RNC_609a HSDPA Retainability for NRT Traffic
comparable trend
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RNC_605a HSDPA Accessibility for NRT Traffic
from User point of View comparable trend
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HS throughput
There is a gain after implementing HS-SCCH=3,
more obvious on site 1415 which is high load site
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F1128 throughput
There is a gain after implementing HS-SCCH=3
but obvious in all sectors
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F1415 throughput
There is a gain after implementing HS-SCCH=3,
obvious in all sectors of F1
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F1415 throughput
There is a gain after implementing HS-SCCH=3,
obvious in all sectors of F2
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HS data volume trend
The HS data volume is not really taking an increasingtrend
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reported CQI comparable trends
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active HS-SCCH power comparable
trends
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Avg Schd HSDPA UEs per TTI
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Code tree blocking rate
Some of the cells are showing a an improvement in the
code blocking rate
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Code tree blocking rate- F1415
Sector E is showing a significant improvement in the
code blocking rate
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MAC hs Efficiency (Scheduled TTI)
This confirms the load between the 2 sites
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HSDPAUsers
F1415 is having
higher HS users
than F1128 asexpected
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HSDPA CH code DG
Slight decrease of
HS channels
downgrade due toRT & NRT in
F1128
The decrease is
seen as well for
the site 1415 in
the first days afterthe change.
l h d
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Original MAC-hs transmissions, XX code, 16QAM
increase of usage for 5-6-10-15 codes
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Direct SWI from DCH x/x kbps to HS-DSCH
increase of direct switch to HSDPA in F1415
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CH SWI from HS-DSCH/DCH to DCH/DCH (xx/yy)
slight increase of channel switch
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CH SWI from HS-DSCH/E-DCH to HS-DSCH/DCH
decrease of downswitch EDCH to DCH in F1415
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RAN1509: RAB Bit Rate Counters
KPI Alias BITRATE
RAB_STP_ATT_BR_CLASS_1_DL (M1001C659) BITRATE
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RAN1509: RAB Bit Rate Counters- F1415
increase of sample with bit-rate between7.2 Mbps < < 10 Mbps
RAN1509 RAB Bi R C F1128
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RAN1509: RAB Bit Rate Counters F1128
slight increase of sample with bit-rate between7.2 Mbps < < 10 Mbps
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User DL throughput distribution
class ranges
KPI Alias The number of connections with XX Mbit/s downlink RLC PDU gross throughput
USER_DL_THRP_DIST_CLASS_8 (M1017C41) 256...512 kbit/s
USER_DL_THRP_DIST_CLASS_9 (M1017C42) 512 kbit/s...1 Mbit/s
USER_DL_THRP_DIST_CLASS_10 (M1017C43) 1 Mbit/s...2 Mbit/s
USER_DL_THRP_DIST_CLASS_11 (M1017C50) 2 Mbit/s...4 Mbit/s
USER_DL_THRP_DIST_CLASS_12 (M1017C51) 4 Mbit/s...8 Mbit/s
USER_DL_THRP_DIST_CLASS_13 (M1017C52) larger than the 8 Mbit/s
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USER_DL_THRP_DIST F1415
increase of samples with bit-rate between4 Mbps < < 8 Mbps
USER DL THRP DIST F1128
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USER_DL_THRP_DIST F1128
increase of samples with bit-rate between4 Mbps < < 8 Mbps
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Conclusion
The gain is showing in a more evident way for the
high load site
The DT is showing very good improvement for HSuser throughput in high loaded site
We observed an increase of HS throughput in bothcell and user levels when decreasing the HS-SCCH to
3 in high load site