eidzp.042766.ind - dynamic half rate trial result rev a
DESCRIPTION
Dynamic Half rate TrialTRANSCRIPT
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Strictly Confidential
REPORT 1 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
DYNAMIC HALF RATE TRIAL RESULT
MJK07 &
BJK13
Indosat Single Network Project
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Strictly Confidential
REPORT 2 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
Abstract This document highlights the results of the Dynamic Half Rate Trial in MJK07 MSC and BJK13 BSC. Table of Contents 1 EXECUTIVE SUMMARY.....................................................................3 2 TERMINOLOGY..................................................................................3 3 IMPLEMENTATION OVERVIEW ........................................................4 4 TRIAL RESULT ...................................................................................4 4.1 Functionality Tests ..............................................................................4 4.1.1 Dynamic Half Rate Allocation..............................................................4 4.1.1.1 Half Rate Calls ....................................................................................4 4.1.1.2 Half Rate Call Handover to Half Rate Cell ..........................................5 4.1.1.3 Half Rate Call Handover to Full Rate Cell ...........................................5 4.1.1.4 Full Rate Call Handover to Half Rate Cell ...........................................5 4.1.2 Dynamic Mode Adaptation ..................................................................6 4.1.2.1 Intra-cell handover from Full Rate to Half Rate and vice versa ...........6 4.1.3 Dynamic Allocation of Transcoders in Pool & Self Configuring
Transcoder Pool ..................................................................................6 4.2 Drive Test Result .................................................................................7 4.2.1 Speech Quality Index (SQI).................................................................7 4.3 STS Results ........................................................................................8 4.3.1 TCH Traffic and Speech Quality Index................................................8 4.3.2 TCH Assignment Success Rate and TCH Time Congestion...............8 4.3.3 TCH Drop Rate....................................................................................9 4.3.4 Dynamic Mode Adaptation ................................................................10 4.3.5 Handover Success Rate....................................................................10 5 SUMMARY OF RECOMMENDATIONS............................................32 6 REFERENCES..................................................................................32 7 DISTRIBUTION LIST ........................................................................32
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Strictly Confidential
REPORT 3 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
1 EXECUTIVE SUMMARY
Dynamic Half Rate Allocation feature was implemented in BJK13 BSC and its corresponding MSC, MJK07, starting 7th of October 2004. Palm View, a single band GSM900 site, was used for the trial.
The highlights of the trial can be summarized as follows:
The amount of traffic gained in activating half rate varies daily. From the trial, the maximum increase in traffic load is 20%.
For the trial cell with the highest TCH utilization, there is no noticeable effect in TCH traffic by increasing the threshold (e.g. from 30% to 60%) beyond the point TCH congestion is significantly reduced (if not totally eliminated).
With half rate activated, the percentage of good and acceptable Speech Quality Index declined from 98% to 1) between 94% and 96% for Dynamic Half Rate threshold at 30% 2) and between 92% and 94% for Dynamic Half Rate thresholds 60% and above.
With the activation of half rate, TCH time congestion can be significantly reduced and the related low TCH assignment success rate can also be improved. For the trial cell with the highest utilization, TCH time congestion between ~7% to15% is reduced to minimal value of 0.3% and the related low TCH assignment success rate between ~95% to 97% also improved to more or less 99.8%.
TCH drop rate increased slightly in the cell with the highest TCH utilization from 0.8% to 0.95%.
Dynamic mode adaptation mode from FR to HR and vice versa works well. The success rate is considerably high.
Also included in the report are cell performance graphs related to the trial for reference and a summary of recommendations.
2 TERMINOLOGY BCCH Broadcast Control Channel RSITE Radio Site SQI Speech Quality Index STS Statistics & Traffic measurement Subsystem TCH Traffic Channel
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Strictly Confidential
REPORT 4 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
3 IMPLEMENTATION OVERVIEW
The trial was implemented according to the schedule in Table 1. However, there were no cells other than the trial cells were activated on October 15, 2004. The settings of the trial cells were put back to Trial Settings 1 on October 18, 2004.
Day Date Time1 6-Oct-2004, Wed Daytime Drive test (before half rate implementation)
21:00 - 01:00H Activation of the Dynamic Half Rate Allocation feature2 7-Oct-2004, Thu 01:00 - 04:00H Functionality tests
08:00 - 12:00H Drive test 10:00 - 24:00H
3 8-Oct-2004, Fri 00:00 - 24:00H
4 9-Oct-2004, Sat 00:00 - 24:00H
5 10-Oct-2004, Sun 00:00 - 24:00H
6 11-Oct-2004, Mon 10:00 - 24:00H
7 12-Oct-2004, Tue 00:00 - 24:00H
8 13-Oct-2004, Wed 15:00 - 24:00H
9 14-Oct-2004, Thu 00:00 - 24:00H
10 15-Oct-2004, Fri 00:00 - 24:00H
Description
Trial Settings 1: Dynamic Half Rate Threshold: 30%; Dynamic Mode Adaptation Threshold: 20%; FR-HR Quality Threshold: 25 dtqu; HR-FR Quality Threshold: 40 dtqu
Trial Settings 2: Dynamic Half Rate Threshold: 60%; Dynamic Mode Adaptation Threshold: 40%; FR-HR: 25 dtqu; HR-FR: 40 dtqu.
Performance monitoring, change implementation if required
Trial Settings 3: Dynamic Half Rate Threshold: 100%; Dynamic Mode Adaptation Threshold: 40%; FR-HR: 25 dtqu; HR-FR: 40 dtqu.
Table 1. Implementation overview
4 TRIAL RESULT
The trial results are presented according to the following categories:
Functionality test
Drive test
STS
4.1 Functionality Tests
4.1.1 Dynamic Half Rate Allocation
4.1.1.1 Half Rate Calls
Half rate calls were successful in the test cells.
SITE CELL BCCH RESULTPALM VIEW JB00201 43 OKPALM VIEW JB00202 41 OKPALM VIEW JB00203 30 OK
Table 2.1 Half Rate Call Results
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REPORT 5 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
4.1.1.2 Half Rate Call Handover to Half Rate Cell
Intercell handover of a half rate call to a half rate cell was tested to be successful. The resource allocated after the handover is half rate.
RSITE CELL BCCH RSITE CELL BCCHPALM VIEW JB00201 43 PALM VIEW JB00202 41 OKPALM VIEW JB00202 41 PALM VIEW JB00203 30 OKPALM VIEW JB00203 30 PALM VIEW JB00201 43 OK
SERVING CELL DESTINATION CELL RESULT
Table 2.2 Half Rate Call Handover to Half Rate Cell Results
4.1.1.3 Half Rate Call Handover to Full Rate Cell
Intercell handover of a half rate call to a full rate cell was tested to be successful. Full rate was allocated in the target cell. The tests included:
Intercell handover from Indosat cell to Indosat cell Intercell hand over from Indosat cell to Satelindo cell Intercell handover from Indosat cell to IM3 cell
SITE CELL BCCH SITE CELL BCCHPALM VIEW JB00203 30 TAMAN SURYA JB00242 35 OK Indosat - IndosatPALM VIEW JB00203 30 LILI BASF1 13100 33 OK Indosat - SatelindoPALM VIEW JB00202 41 BOJONG INDAH1 10371 743 OK Indosat - IM3
RemarksSERVING CELL DESTINATION CELL RESULT
Table 2.3 Half Rate Call Handover to Full Rate Cell Results
4.1.1.4 Full Rate Call Handover to Half Rate Cell
Intercell handover of a half rate call to a full rate cell was tested to be successful. For all of these cases, half rate was allocated in the target cells. The tests included:
Intercell handover from Indosat cell to Indosat cell Intercell hand over from Satelindo cell to Indosat cell Intercell handover from IM3 cell to Indosat cell
SITE CELL BCCH SITE CELL BCCHTAMAN SURYA JB00242 35 PALM VIEW JB00203 30 OK Indosat - IndosatLILI BASF1 13100 33 PALM VIEW JB00203 30 OK Satelindo - IndosatBOJONG INDAH1 10371 743 PALM VIEW JB00202 41 OK IM3 - Indosat
RemarksDESTINATION CELLSERVING CELL RESULT
Table 2.4 Full Rate Call Handover to Half Rate Cell Results
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Strictly Confidential
REPORT 6 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
4.1.2 Dynamic Mode Adaptation
4.1.2.1 Intra-cell handover from Full Rate to Half Rate and vice versa
Dynamic Mode Adaptation was also tested. The functionality test was successful.
CONDITION INTRACELL HANDOVER RESULT
Quality below threshold FR - HR OKQuality above threshold HR - FR OK
Table 2.5 Intra-cell handover from Full Rate to Half Rate, Half Rate to Full Rate Results
4.1.3 Dynamic Allocation of Transcoders in Pool & Self Configuring Transcoder Pool
When a call is initiated in a half rate cell and there are no half rate transcoder resources available, non-half rate TRAs are allocated.
Self Configuring Transcoder Pool was not tested due to unavailability of the supporting feature in the OSS.
In d e x T e s t C a s e R e s u lt
1C a ll s e t-u p in 1 0 0 % H R c e ll w ith n o H R T R A re s o u rc e s , S e lf C o n fig u rin g T ra n s c o d e r P o o l IN A C T IV E .
O K
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C a ll s e t-u p in 1 0 0 % H R c e ll w ith lim ite d b u t in s u ff ic ie n t n u m b e r o f H R T R A re s o u rc e s , S e lf C o n fig u rin g T ra n s c o d e r P o o l A C T IV E .
N O T T E S T E D
Table 2.6 Dynamic Allocation of Transcoders in Pool & Self Configuring Transcoder Pool Results
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Strictly Confidential
REPORT 7 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
4.2 Drive Test Result
4.2.1 Speech Quality Index (SQI)
Figure 1.1 shows the SQI drive test results taken before and after the activation of Dynamic Half Rate Allocation feature. Figure 1.2 gives an indication of the radio environment quality when the measurements were taken.
The SQI data used in the comparison were taken from the enclosed areas of Figure 1.1. As expected, the SQI was lower when half rate was active. However, the average SQI, 15.96 dBQ is close to the maximum attainable SQI for half rate which is 17dBQ and way above the threshold of acceptable SQI of 5dBQ.
B E FOR E D E S C R IP TION AFTE R10 S Q I, m in . 930 S QI, m a x . 17
28.02 S Q I, a ve . 15.96
Figure 1.1 Speech Quality Index (Before and After the Activation of Dynamic Half Rate Allocation Feature)
B E F O R E D E S C R IP T IO N A F T E R1.23 R X Q U A L , a ve . 0 .6
Figure 1.2 Radio Quality during the Measurements
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Strictly Confidential
REPORT 8 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
4.3 STS Results
4.3.1 TCH Traffic and Speech Quality Index
To facilitate the analysis of the results, only the measurements during weekdays are considered.
As expected, the effect of half rate was observed most in the trial cell with the highest TCH utilization before the activation of the feature. The effect is high - TCH/H traffic was, in most cases, greater than TCH/F traffic - even at low threshold. Please refer to Figure 2.1.
For the trial cell with the highest TCH utilization, there is no noticeable effect in TCH traffic by increasing the threshold. The most probable reason to this is that the TCH congestion is significantly reduced (if not totally eliminated) and the TCH assignment success rate improved significantly with half rate threshold set at 30%. Hence increasing the threshold does not bring any difference. Please refer to Figure 2.1.
For cells with low average TCH utilization, half rate had minimal or no effect at low threshold. Increasing the threshold however, yielded half rate traffic. Please refer to Figures 2.2 and 2.3.
The increase in traffic gained in activating half rate varies daily. From the trial the maximum increase in traffic load is 20%. Please refer to Figure 2.1.
With half rate activated, the percentage of good and acceptable Speech Quality Index declined from 98% to: Between 94% and 96% for Dynamic Half Rate threshold at 30% Between 92% and 94% for Dynamic Half Rate thresholds 60%
and above. Please refer to Figures 2.1 to Figures 2.3.
Recommendations 1 & 2: When half rate is considered to be activated in a cell, start with a low threshold e.g. 20% and then gradually increase to a level TCH congestion is relieved and/or the percentage of good & acceptable speech quality samples deteriorates but at acceptable level. Half rate should only be considered as a temporary and short term solution to relieve TCH congestion. Implementing the feature degrades the end users perceived speech quality.
4.3.2 TCH Assignment Success Rate and TCH Time Congestion
To facilitate the analysis, days where there were TCH availability issues are not included.
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REPORT 9 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
With the activation of half rate, TCH time congestion (~7% to15%) is significantly reduced and the related low TCH assignment success rate (~95 to 97%) also improved to more or less 99.8%. Please refer to Figure 2.7.
With minimal or no TCH time congestion and related high TCH assignment success rate, half rate has no effect. Please refer to Figures 2.8 and 2.9.
4.3.3 TCH Drop Rate
For half rate performance analysis, abnormal conditions or alarms were encountered during these days and hence excluded from the analysis.
October 7, 2004 The TCH drop rate increased between 1300H and 1600H with cause Sudden Loss. The trial site had also had Rx diversity lost alarm during this day.
October 11, 2004 and October 13, 2004 The DIP showed Alarm Indication Signal (AIS) affecting resource availability.
The TCH drop rate increased slightly (~0.80% before feature activation) to ~0.95% in the most utilized cell JB00201. There is a significant increase of TCH drop rate in one of the cells, JB00202, from 1.5% to 2.2% but the increase started on October 11, 2004 (middle of the trial). The drop rate performance of the third cell, JB00203, remains at the same level as before the feature was activated. Please refer to Figures 2.10 to 2.12.
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Strictly Confidential
REPORT 10 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
4.3.4 Dynamic Mode Adaptation
There is a high number of mode adaptation attempts from half rate to full rate and full rate to half rate. The quality threshold can be further tuned during the optimization phase to find the suitable quality trigger from half rate to full rate. Please refer to Figures 2.13 to 2.15.
It is interesting to note that the adaptation mode success rate from FR to HR and vice versa is high. Please refer to Figures 2.13 to 2.15.
Recommendations 2 & 3: Dynamic Mode Adaptation should be considered to compliment Dynamic Half Rate Allocation from half rate to full rate to improve speech quality of connections with low rxquality. Most of these connections may be located in the cell border. The quality threshold for Dynamic Mode Adaptation from half rate to full rate can be based on more field tests during optimization phase such that the threshold parameters can be set more aggressively and yet at acceptable speech quality. This is to minimize Dynamic Mode Adaptation attempts some of which could have been triggered early and hence these attempts are unnecessary.
4.3.5 Handover Success Rate
There are no significant changes in handover performance related to the activation of the feature. Please refer to Figures 2.16 to 2.18.
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REPORT 11 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 TCH Traffic vs. SQI
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TH_TRAF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12.12 9.04 6.50 2.49 8.18 12.09 10.83 13.07 12.02
TF_TRAF 14.63 15.31 15.10 12.61 15.86 13.50 15.53 6.11 7.84 8.69 9.43 5.29 4.86 4.63 4.29 3.79
SQI (Good, Acceptable) 98.0 97.9 98.1 98.4 98.1 98.2 98.3 92.3 94.0 95.2 97.6 93.43 91.98 92.22 91.73 92.45
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Dynamic Half RateActivated
Figure 2.1 JB00201 TCH Traffic & Speech Quality Index
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REPORT 12 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
Figure 2.1 B0 20 T H raf c & Sp ec Q ali y In ex
JB00201 TCH Traffic vs. SQI
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TF_TRAF TH_TRAF SQI (Good+Accept)
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REPORT 13 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 TCH Traffic vs. SQI
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TF_TRAF TH_TRAF SQI (Good, Acceptable)
TH_TRAF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.98 0.53 0.40 0.06 1.44 2.71 4.39 5.72 4.35
TF_TRAF 7.89 7.77 7.98 7.12 8.41 6.65 7.91 6.25 7.53 7.15 6.16 4.68 4.41 3.66 2.59 1.93
SQI (Good, Acceptable) 96.1 95.9 96.5 97.1 96.0 96.4 95.9 94.7 95.7 96.4 97.1 93.76 93.97 92.51 92.21 92.05
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.2 JB002002 TCH Traffic & Speech Quality Index
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REPORT 14 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00203 TCH Traffic vs. SQI
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TF_TRAF TH_TRAF SQI (Good, Acceptable)
TH_TRAF 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.67 0.00 0.00 0.00 0.09 0.60 1.95 3.73 3.40
TF_TRAF 4.72 4.65 7.20 4.18 4.87 4.14 5.03 4.88 4.63 4.41 4.13 3.07 3.85 3.09 1.39 1.17
SQI (Good, Acceptable) 98.0 97.2 97.0 98.4 97.5 97.7 97.7 94.5 97.6 97.7 98.4 97.14 96.26 94.48 92.08 91.91
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.3 JB00203 TCH Traffic and Speech Quality Index
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Strictly Confidential
REPORT 15 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 TCH Time Congestion vs. TCH Availability
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TF_TCONGS TH_TCONGS T_AVAIL
TH_TCONGS 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.0 8.7 0.01 0.01
TF_TCONGS 7.4 9.2 12.6 1.6 13.0 9.9 13.5 0.4 0.3 0.0 0.0 0.2 0.1 9.1 0.09 0.14
T_AVAIL 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 87.5 100.0 92.5 99.65 100.00
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Dynamic Half RateActivated
Figure 2.4 JB00201 TCH Time Congestion & TCH Availability
-
Strictly Confidential
REPORT 16 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 TCH Time Congestion vs. TCH Availability
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TF_TCONGS TH_TCONGS T_AVAIL
TH_TCONGS 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.00 0.00
TF_TCONGS 0.1 0.1 0.1 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.00 0.00
T_AVAIL 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 87.5 100.0 97.1 99.63 100.00
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.5 JB00202 TCH Time Congestion and TCH Availability
-
Strictly Confidential
REPORT 17 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00203 TCH Time Congestion vs. TCH Availability
0.0
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TH_TCONGS 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.00
TF_TCONGS 0.0 0.0 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00 0.05
T_AVAIL 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 99.9 100.0 100.0 87.5 100.0 99.8 99.63 99.35
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.6 JB00203 TCH Time Congestion and TCH Availability
-
Strictly Confidential
REPORT 18 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 TCH Assignment Success Rate vs. TCH Time Congestion
80.0
82.0
84.0
86.0
88.0
90.0
92.0
94.0
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100.0
Date
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T_CONGS T_AS_SUC
T_CONGS 7.42 9.19 12.64 1.63 13.00 11.50 13.53 0.41 0.27 0.05 0.01 0.27 0.14 17.83 0.10 0.15
T_AS_SUC 97.5 96.9 90.0 99.5 94.1 95.2 95.0 99.7 99.8 99.8 99.9 99.8 99.7 81.2 99.76 99.80
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Dynamic Half RateActivated
Figure 2.7 JB00201 TCH Assignment Success Rate and TCH Time Congestion
-
Strictly Confidential
REPORT 19 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 TCH Assignment Success Rate vs. TCH Time Congestion
80.0
82.0
84.0
86.0
88.0
90.0
92.0
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Date
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T_CONGS T_AS_SUC
T_CONGS 0.14 0.06 0.07 0.02 0.20 0.03 0.02 0.00 0.02 0.01 0.00 0.23 0.00 0.07 0.00 0.00
T_AS_SUC 99.4 99.3 99.6 99.7 99.3 99.3 99.4 99.4 99.2 99.6 99.7 99.3 99.2 99.2 99.32 99.40
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.8 JB00202 TCH Assignment Success Rate and TCH Time Congestion
-
Strictly Confidential
REPORT 20 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00203 TCH Assignment Success Rate vs. TCH Time Congestion
80.0
82.0
84.0
86.0
88.0
90.0
92.0
94.0
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100.0
Date
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T_CONGS T_AS_SUC
T_CONGS 0.00 0.00 1.46 0.00 0.00 0.01 0.00 0.02 0.00 0.00 0.00 0.08 0.00 0.05 0.00 0.05
T_AS_SUC 99.7 99.9 99.0 99.8 99.9 99.9 99.8 99.6 99.6 99.9 99.8 99.7 99.9 99.8 99.87 99.83
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.9 JB00203 TCH Assignment Success Rate & TCH Time Congestion
-
Strictly Confidential
REPORT 21 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 TCH Drop Performance
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TFNDROP THNDROP T_DR
THNDROP 0 0 0 0 0 0 0 137 82 47 22 138 96 116 109 118
TFNDROP 154 161 159 149 129 191 179 283 169 139 105 124 121 101 148 120
T_DR 0.68 0.65 0.67 0.65 0.52 0.79 0.72 1.56 0.95 0.73 0.64 1.37 0.92 1.05 0.94 0.95
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
TCH drop increased but not related to Half Rate
Figure 2.10 JB00201 TCH Drop Performance
-
Strictly Confidential
REPORT 22 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
Figure 2.10B JB00201 Hourly TCH Traffic and C D op at
JB00201 TCH Traffic vs. TCH Drop Rate
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TF_TRAF TH_TRAF T_DR
TCH drop rate increasedbut not related to Half Rate
T H r R e
-
Strictly Confidential
REPORT 23 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 TCH Drop Performance
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Date
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TFNDROP THNDROP T_DR
THNDROP 0 0 0 0 0 0 0 37 13 12 0 58 72 144 150 96
TFNDROP 229 230 207 151 260 229 198 203 240 145 134 196 154 163 180 137
T_DR 1.51 1.54 1.40 0.96 1.59 1.47 1.23 1.45 1.58 1.07 0.95 2.15 1.76 2.21 2.23 1.85
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.11 JB00202 TCH Drop Performance
-
Strictly Confidential
REPORT 24 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00203 TCH Drop Performance
020406080
100120140160180200220240260280300
Date
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TFNDROP THNDROP T_DR
THNDROP 0 0 0 0 0 0 0 22 0 0 0 1 11 49 34 42
TFNDROP 52 62 97 46 65 58 59 91 67 60 57 83 42 57 29 33
T_DR 0.69 0.73 0.84 0.56 0.79 0.73 0.74 0.98 0.83 0.69 0.74 1.45 0.66 1.30 0.75 0.84
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.12 JB00203 TCH Drop Performance
-
Strictly Confidential
REPORT 25 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 Full Rate/Half Rate Dynamic Mode Adaptation
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HOATFRHRNAMR HOATHRFRNAMRH_SUC_FR_HR_NAMR H_SUC_HR_FR_NAMR
HOATFRHRNAMR 0 0 0 0 0 0 0 2,497 2,442 1,621 473 2,201 2,899 2,378 3100 2482
HOATHRFRNAMR 0 0 0 0 0 0 0 8,740 8,268 5,229 1,531 6,641 9,578 10,071 10850 9004
H_SUC_FR_HR_NAMR 0 0 0 0 0 0 0 98.0 99.0 99.7 99.6 98.9 99.6 99.4 99.5 99.4
H_SUC_HR_FR_NAMR 0 0 0 0 0 0 0 89.9 93.6 98.4 99.5 96.8 97.0 80.9 97.1 96.7
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.13 JB00201 Full Rate/Half Rate Mode Adaptation
-
Strictly Confidential
REPORT 26 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 Full Rate/Half Rate Dynamic Mode Adaptation
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HOATFRHRNAMR HOATHRFRNAMRH_SUC_FR_HR_NAMR H_SUC_HR_FR_NAMR
HOATFRHRNAMR 0 0 0 0 0 0 0 343 304 250 38 311 463 604 533 76
HOATHRFRNAMR 0 0 0 0 0 0 0 356 436 300 50 1,448 2,646 4,379 5879 4055
H_SUC_FR_HR_NAMR 0.0 0.0 0.0 0.0 0.0 0.0 0.0 99.4 98.0 98.4 100.0 99.4 100.0 99.7 99.6 100
H_SUC_HR_FR_NAMR 0.0 0.0 0.0 0.0 0.0 0.0 0.0 99.4 97.5 97.3 100.0 97.5 97.9 96.7 97.7 98.2
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.14 JB00202 Full Rate/Half Rate Dynamic Mode Adaptation
-
Strictly Confidential
REPORT 27 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 Full Rate/Half Rate Dynamic Mode Adaptation
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HOATFRHRNAMR HOATHRFRNAMRH_SUC_FR_HR_NAMR H_SUC_HR_FR_NAMR
HOATFRHRNAMR 0 0 0 0 0 0 0 261 0 0 0 3 24 38 5 4
HOATHRFRNAMR 0 0 0 0 0 0 0 995 1 4 0 64 463 1,573 2491 2211
H_SUC_FR_HR_NAMR 0.0 0.0 0.0 0.0 0.0 0.0 0.0 98.1 0.0 0.0 0.0 100.0 100.0 97.4 100 100
H_SUC_HR_FR_NAMR 0.0 0.0 0.0 0.0 0.0 0.0 0.0 94.9 100.0 100.0 0.0 100.0 99.1 98.7 98.9 97.6
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013 041014 041015
Figure 2.15 JB00203 Full Rate Half Rate Dynamic Mode Adaptation
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Strictly Confidential
REPORT 28 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00201 Outgoing & Incoming Handover Performance
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HO_SUC 96.9 96.9 97.6 98.1 96.4 96.8 96.9 97.0 97.1 97.5 97.7 96.9 96.6 96.8
HI_SUC 98.7 98.8 98.5 98.6 98.7 98.7 98.8 97.9 98.3 98.5 98.5 98.6 98.5 98.6
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013
Figure 2.16 JB00201 Outgoing and Incoming Handover Performance
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Strictly Confidential
REPORT 29 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00202 Outgoing & Incoming Handover Performance
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HO_SUC 97.2 96.7 97.6 98.1 97.1 97.4 97.2 97.7 97.3 97.2 97.9 97.1 97.7 96.8
HI_SUC 95.7 96.0 96.8 97.2 95.9 95.5 95.7 95.3 95.3 96.1 96.9 95.6 94.0 94.8
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013
Figure 2.17 JB00202 Outgoing and Incoming Handover Performance
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Strictly Confidential
REPORT 30 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
JB00203 Outgoing & Incoming Handover Performance
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HO_SUC 98.9 98.9 98.7 99.0 99.1 99.2 99.0 98.4 98.9 98.3 98.8 99.1 99.1 99.1
HI_SUC 98.8 98.4 98.2 98.9 98.4 98.2 98.4 98.5 98.1 98.2 97.7 97.8 97.8 97.7
040930 041001 041002 041003 041004 041005 041006 041007 041008 041009 041010 041011 041012 041013
Figure 2.18 JB00203 Outgoing and Incoming Handover Performance
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Strictly Confidential
REPORT 31 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
BJK13 Transcoder Resources
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Figure 2.19 BJK13 Transcoder Resource
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Strictly Confidential
REPORT 32 (32)Prepared (also subject responsible if other) No.
EID/Z/S Joel Philamer V. Quinez EID/Z/P-04:2766/IND Uen Approved Checked Date Rev Reference
EID/Z/S Harry Sanchez 2004-10-25 A
5 SUMMARY OF RECOMMENDATIONS
When half rate is considered to be activated in a cell, start with a low threshold e.g. 20% and then gradually increase to a level TCH congestion is relieved and/or the percentage of good & acceptable speech quality samples deteriorates but at acceptable level.
Half rate should only be considered as a temporary and short term solution to relieve TCH congestion. Implementing the feature degrades the end users perceived speech quality.
Dynamic Mode Adaptation should be considered to compliment Dynamic Half Rate Allocation from half rate to full rate to improve speech quality of connections with low rxquality. Most of these connections may be located in the cell border.
The quality threshold for Dynamic Mode Adaptation from half rate to full rate can be based on more field tests during optimization phase such that the threshold parameters can be set more aggressively and yet at acceptable speech quality. This is to minimize Dynamic Mode Adaptation attempts some of which could have been triggered early and hence these attempts are unnecessary.
6 REFERENCES [1] EID/Z/P-04:2456 Half Rate Implementation Proposal Rev. A
[2] EID/Z/P-04:2457 Half Rate Functionality Tests Rev. A
7 DISTRIBUTION LIST Receiver Information copy Sudirman Indosat EID Hutomo Yunianto Heri Purnomo Indosat
Labib Mansur Indosat EID Mutia Wulandari Aan Suwandoko
Indosat Adhi Sunardi Indosat EID Supachai
Phomasakha Hartis Indosat
Mirza Helmi Indosat EID Tien Fok Nadaraja Didik Subagio Indosat EID Nusa Gura EID Meidiana Koesuma EID Subramaniam
Thanakodi
EID John Spanberg EID Par Molin EID Setyo Budhi
EXECUTIVE SUMMARYTERMINOLOGYIMPLEMENTATION OVERVIEWTRIAL RESULTFunctionality TestsDynamic Half Rate AllocationHalf Rate CallsHalf Rate Call Handover to Half Rate CellHalf Rate Call Handover to Full Rate CellFull Rate Call Handover to Half Rate Cell
Dynamic Mode AdaptationIntra-cell handover from Full Rate to Half Rate and vice versa
Dynamic Allocation of Transcoders in Pool & Self Configuring Transcoder Pool
Drive Test ResultSpeech Quality Index (SQI)
STS ResultsTCH Traffic and Speech Quality IndexTCH Assignment Success Rate and TCH Time CongestionTCH Drop RateDynamic Mode AdaptationHandover Success Rate
SUMMARY OF RECOMMENDATIONSREFERENCESDISTRIBUTION LISTReceiver