Hs Scch Codes

8/4/2019 Hs Scch Codes

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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


2/31

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


3/31

4 users/TTI disabled


4/31

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








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 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 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 915.5 Mbps 20.0 Mbps 15.1 Mbps 25.6 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 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


7/31

RNC_605a HSDPA Accessibility for NRT Traffic

from User point of View comparable trend


8/31

HS throughput

There is a gain after implementing HS-SCCH=3,

more obvious on site 1415 which is high load site


9/31

F1128 throughput

There is a gain after implementing HS-SCCH=3

but obvious in all sectors


10/31

F1415 throughput


obvious in all sectors of F1


11/31

F1415 throughput


obvious in all sectors of F2


12/31

HS data volume trend

The HS data volume is not really taking an increasingtrend


13/31

reported CQI comparable trends


14/31

active HS-SCCH power comparable

trends


15/31

Avg Schd HSDPA UEs per TTI


16/31

Code tree blocking rate

Some of the cells are showing a an improvement in the

code blocking rate


17/31

Code tree blocking rate- F1415

Sector E is showing a significant improvement in the

code blocking rate


18/31

MAC hs Efficiency (Scheduled TTI)

This confirms the load between the 2 sites


19/31

HSDPAUsers

F1415 is having

higher HS users

than F1128 asexpected


20/31

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


22/31

Direct SWI from DCH x/x kbps to HS-DSCH

increase of direct switch to HSDPA in F1415


23/31

CH SWI from HS-DSCH/DCH to DCH/DCH (xx/yy)

slight increase of channel switch


24/31

CH SWI from HS-DSCH/E-DCH to HS-DSCH/DCH

decrease of downswitch EDCH to DCH in F1415


25/31

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


28/31

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_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


31/31

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

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Hs Scch Codes