analysis of license issue and ce congestion for raj
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CE Congestion Analysis
RAJASTHAN CIRCLE
Prepared By:Yash Sinha ,UMTS TEAM Rajasthan CircleDate : 29/09/2012
Major Issue observed :
The increasing UL Traffic for the R99 and HSPA Services has impacted the NQI , since the UL CE cong. was pegged and contributed towards the low access rate. Details of Jaipur and Ajmer RNC is as below.
The below BAR chart indicates the Success Rate for RRC, HSDPA, HSUPA and R99:
196
96.5
97
97.5
98
98.5
99
99.5
100 99.8024731109556
98.4904702626268
97.5929835959071
98.5574525225398
RRC Success Rate HSDPA Success Rate HSUPA Success Rate PS R99 Success Rate
194
95
96
97
98
99
10099.5417210540416
96.9988247721567
96.2204855799983
97.4544423172375
RRC Success Rate HSDPA Success Rate HSUPA Success Rate PS R99 Success Rate
Jaipur RNC , 30.8.2012 DBH Hour
Ajmer RNC , 30.8.2012 DBH Hour
Now we dig up the major cause for the RAB Failure in PS Mode , and found that the RAB Failure was mainly due to UL CE cong. Details of RAB Failure in Ajmer RNC :
Details of RAB Failure in Jaipur RNC :
1602268
638
VS.RAB.FailEstabPS.TNL VS.RAB.FailEstabPS.ULCE.CongVS.RAB.FailEstabPS.ULIUBBand.Cong VS.RAB.FailEstabPS.ULPower.CongVS.RAB.FailEstabPS.UuNoReply
Below is the list of sites which were having PS RAB , RRC cong. The Card relocation and addition was done for the sites indicated in green color which reduced the overall CE Cong. in Jaipur RNC.
KPI Snap shot for the sites under CE cong. :
Major Breakthrough achieved for the congestion removal :
1. CE Hardware addition. 2. LDR Parameter change.3. User BIT Rate reduction.4. Parameter optimization for Power and Code Cong. removal.5. Physical Optimization activity performed on the cells.
The details of each breakthrough and impact observed after the changes is covered as below :
1.1.1 CE HARDWARE ADDITION:
CE hardware addition performed on top 10 priority sites of which 5 cards were taken from switched off sites (Near to school) , 4 card from spares and 1 from non operational site(SMS Hospital). The sample of PRE and POST KPI observed after the CE Card addition is as below.
KPI OF Kumbhamarg before CE card addition:
Post KPI of Kumbhamarg Site after the CE card addition: the below graph indicates that the major improvement has been observed after the CE Card addition on the sites having high CE Cong. ratio on RRC and RAB. It is due to the High CE requirement for HSUPA and R99 Services.
1.1.2 LDR Parameter Changes :
LDR Parameter changes performed in the Jaipur and Ajmer RNC dated 26th Sept 2012 , after which the Ajmer RNC success rate increased by approx 10 % and Jaipur RNC increased by 1.2 %
HSDPA , HSUPA , R99 Access Success Rate since 27th Aug 2012.
24-Aug 29-Aug 3-Sep 8-Sep 13-Sep 18-Sep 23-Sep 28-Sep 3-Oct60.00
65.00
70.00
75.00
80.00
85.00
90.00
95.00
100.00
81.08
88.21
79.9582.2781.5982.27
84.56
89.4487.32
83.71
87.76
84.1085.7284.39
80.8081.47
76.72
82.7381.46
85.69
78.38
72.05
66.05
71.3972.4475.86
71.0372.4773.21
77.08
88.6589.37
RC-G-AJMR-RNC-01-HU RC-G-JIPR-RNC-01-HU
HSDPA + HSUPA + R99 Access Success Rate
09/13/2012 23:00
09/14/2012 23:00
09/15/2012 23:00
09/16/2012 23:00
09/17/2012 23:00
09/18/2012 23:00
09/19/2012 23:00
09/20/2012 23:00
09/21/2012 23:00
09/22/2012 23:00
09/23/2012 23:00
09/24/2012 23:00
09/25/2012 23:00
09/26/2012 23:00
09/27/2012 23:00
09/28/2012 23:000
1000
2000
3000
4000
5000
6000
PAYLOAD TREND FOR AJMER RNC FOR DBH HOUR
HSUPA Payload(MB) PS R99UL Payload(MB)
Payload in Mb
Site wise analysis where the LDR parameters were changed in the Ajmer RNC :
It can be clearly seen as per the above graph that the VS.RAB.FAILESTABPS.UL.CE.CONG. counter value has been decreased significantly after the changes implemented on 26th Sept 2012 , these sites were contributing the 80 to 90 % of CE cong at the RNC level.
1.1.3 User BIT Rate reduction:
2. Parameter impact details
The below graph indicates the Average no. of Radio bearers hourly in the UL direction for Background and Interactive class before the Parameter changes.
09/12/2
012 00:0
0
09/12/2
012 02:0
0
09/12/2
012 04:0
0
09/12/2
012 06:0
0
09/12/2
012 08:0
0
09/12/2
012 10:0
0
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012 12:0
0
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012 14:0
0
09/12/2
012 16:0
0
09/12/2
012 18:0
0
09/12/2
012 20:0
0
09/12/2
012 22:0
00
500
1000
1500
2000
2500
VS.RB.PS.Bkg.UL.32
VS.RB.PS.Bkg.UL.64
VS.RB.PS.Int.UL.32
VS.RB.PS.Int.UL.64
The below graph indicates the Average no. of Radio bearers hourly in the UL direction for Background and Interactive class After the Parameter changes.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
00
200
400
600
800
1000
1200
1400
1600
1800
2000
VS.RB.PS.Bkg.UL.32
VS.RB.PS.Bkg.UL.64
VS.RB.PS.Int.UL.32
VS.RB.PS.Int.UL.64
The changes at the RNC for the parameter UlBeTraffInitBitrate setted to D32 was done at 16:00 Hrs.
After the changes we can clearly see that the 64 RB has reduced on both Bkg , Interactive and 32 RB has take the initial call attempts from 64 RB.
The Below graph indicates the Payload (MB) and R99 Throughput (bps) , It can be clearly seen from the below graph that the PS 128 UL Payload increases as the Busy Hour approaches since the data download and the CE bit rate reduction is functional.
09/13/2
012 01:00
09/13/2
012 03:00
09/13/2
012 05:00
09/13/2
012 07:00
09/13/2
012 09:00
09/13/2
012 11:00
09/13/2
012 13:00
09/13/2
012 15:00
09/13/2
012 17:00
09/13/2
012 19:00
09/13/2
012 21:00
09/13/2
012 23:000
500100015002000250030003500400045005000
0
5
10
15
20
25
30
35
40
PS128 R99UL Pay-load(MB)
PS384 R99UL Pay-load(MB)
PS64 R99UL Payload(MB)
VS.P-S.Through-put.UL64.bps
The below chart indicates the LDR BE Rate reduction and the UL R99 Payload.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
00
50
100
150
200
250
300
010002000300040005000600070008000900010000
VS.L-CC.L-DR.UL.BE-Rate-Down
PS R99UL Pay-load(MB)
Hourly details of PS RB : The below graph will indicate the PS RB Details at diff. hours on 13th Sept 2012.
The below bar chart indicated the Average RB Users on the diff. SF.
1. Bar Chart Indicating the RB @ 13/09/2012, 16:00 Hrs
Series1
The above chart indicates the high UL 64 RB as Initialbit rate was UL64.
2. Bar Chart Indicating the RB @ 13/09/2012 , 19:00 Hrs
VS.R...
VS.R...
VS.
VS.R...
VS.
VS.R...
VS. VS.0
200
400
600
800
1000
1200
Series1
The above chart indicates the high UL 32 RB as Initialbit rate after implementation.
3. Bar Chart Indicating the RB @ 13/09/2012 , 23:00 Hrs
VS.RB.P
S.Bkg
.UL.1
28
VS.RB.P
S.Bkg
.UL.1
44
VS.RB.P
S.Bkg
.UL.1
6
VS.RB.P
S.Bkg
.UL.2
56
VS.RB.P
S.Bkg
.UL.3
2
VS.RB.P
S.Bkg
.UL.3
84
VS.RB.P
S.Bkg
.UL.6
4
VS.RB.P
S.Bkg
.UL.8
0
200
400
600
800
1000
1200
Series1
The above chart indicates the high UL 32 and UL 64 RB at DBH Hour, after implementation.
3. Congestion analysis on the RNC level:
The below chart indicate the impact of Parameter changes on the RNC Level.
1. RNC WISE RRC and RAB Cong. Analysis on 13th Sept 2012 :
09/13/2
012 00:00
09/13/2
012 02:00
09/13/2
012 04:00
09/13/2
012 06:00
09/13/2
012 08:00
09/13/2
012 10:00
09/13/2
012 12:00
09/13/2
012 14:00
09/13/2
012 16:00
09/13/2
012 18:00
09/13/2
012 20:00
09/13/2
012 22:00
09/14/2
012 00:00
09/14/2
012 02:00
09/14/2
012 04:00
09/14/2
012 06:00
09/14/2
012 08:000
500
1000
1500
2000
2500
3000
3500
4000
4500
VS.RRC.Rej.ULCE.Cong
VS.RAB.-FailEstabCS.ULCE.-Cong
VS.RAB.-FailEstabPS.ULCE.-Cong
The PS RAB Cong. Due to UL CE was 4253 @ 22:00 Hrs and 2332 @ 23:00 Hrs (DBH)
If we compare the DBH hour data of 13th and previous days we find a reduction of around 3K .
2. RNC WISE RRC and RAB Cong. Analysis on 12th and 11th Sept 2012 :
09/11/2
012 00:00
09/11/2
012 03:00
09/11/2
012 06:00
09/11/2
012 09:00
09/11/2
012 12:00
09/11/2
012 15:00
09/11/2
012 18:00
09/11/2
012 21:00
09/12/2
012 00:00
09/12/2
012 03:00
09/12/2
012 06:00
09/12/2
012 09:00
09/12/2
012 12:00
09/12/2
012 15:00
09/12/2
012 18:00
09/12/2
012 21:00
0
2000
4000
6000
8000
10000
12000
14000
VS.RRC.Rej.ULCE.Cong
VS.RAB.-FailEstabCS.ULCE.-Cong
VS.RAB.-FailEstabPS.ULCE.-Cong
3. Radio Bearer analysis on the Site level:
The below details will focus on the PS UL CE cong. analysis on the site level.
1. RB wise details @ 13th Sept 2012 of site SITAPURA having high Cong. in UL.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
00
5
10
15
20
25
30
VS.RB.PS.Bkg.UL.32VS.RB.PS.Bkg.UL.64VS.RB.PS.Int.UL.32VS.RB.PS.Int.UL.64
2. RB wise details @ 13th Sept 2012 of site GHATGATE(WIN5) having high Cong. in UL.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
00
5
10
15
20
25
30
VS.RB.PS.Bkg.UL.32VS.RB.PS.Bkg.UL.64VS.RB.PS.Int.UL.32VS.RB.PS.Int.UL.64
4. UL CE Cong. analysis on the Site Ghatgate(win5):
1. UL CE Cong. @ 12th Sept 2012 of site GHATGATE(WIN5) having high Cong. in UL.
09/12/2
012 00:00
09/12/2
012 02:00
09/12/2
012 04:00
09/12/2
012 06:00
09/12/2
012 08:00
09/12/2
012 10:00
09/12/2
012 12:00
09/12/2
012 14:00
09/12/2
012 16:00
09/12/2
012 18:00
09/12/2
012 20:00
09/12/2
012 22:00
0
50
100
150
200
250
300
VS.RRC.Re-j.ULCE.Cong
VS.RAB.-FailEstabC-S.ULCE.Cong
VS.RAB.-FailEstabP-S.ULCE.Cong
PS R99UL Pay-load(MB)
2. UL CE Cong. @ 13th Sept 2012 of site GHATGATE(WIN5) having high Cong. in UL.
09/13/2
012 00:00
09/13/2
012 02:00
09/13/2
012 04:00
09/13/2
012 06:00
09/13/2
012 08:00
09/13/2
012 10:00
09/13/2
012 12:00
09/13/2
012 14:00
09/13/2
012 16:00
09/13/2
012 18:00
09/13/2
012 20:00
09/13/2
012 22:00
09/14/2
012 00:00
09/14/2
012 02:00
09/14/2
012 04:00
09/14/2
012 06:00
09/14/2
012 08:00
09/14/2
012 10:00
020406080
100120140160180200
0
50
100
150
200
250
300 VS.RRC.Re-j.ULCE.-CongVS.RAB.-FailEstabCS.ULCE.-CongVS.RAB.-FailEstabPS.ULCE.-CongPS R99UL Payload(MB)
3. UL CE Cong. @ 12th Sept 2012 of site GHATGATE(WIN5) having high Cong. in UL.
09/12/2
012 00:0
0
09/12/2
012 02:0
0
09/12/2
012 04:0
0
09/12/2
012 06:0
0
09/12/2
012 08:0
0
09/12/2
012 10:0
0
09/12/2
012 12:0
0
09/12/2
012 14:0
0
09/12/2
012 16:0
0
09/12/2
012 18:0
0
09/12/2
012 20:0
0
09/12/2
012 22:0
00
2
4
6
8
10
12
14
J Congestion Analysis -RRC Congestion Ratio
J Congestion Analysis - PS RAB Congestion Ratio
4. UL CE Cong. @ 13th Sept 2012 of site GHATGATE(WIN5) having high Cong. in UL.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
0
09/14/2
012 10:0
00
1
2
3
4
5
6
7
8
J Conges-tion Analysis -RRC Con-gestion Ratio
J Conges-tion Analysis - PS RAB Conges-tion Ratio
5. UL CE Cong. analysis on the Site SITAPURA :
1. UL CE Cong. @ 12th Sept 2012 of site SITAPURA having high Cong. in UL.
09/12/2
012 00:0
0
09/12/2
012 02:0
0
09/12/2
012 04:0
0
09/12/2
012 06:0
0
09/12/2
012 08:0
0
09/12/2
012 10:0
0
09/12/2
012 12:0
0
09/12/2
012 14:0
0
09/12/2
012 16:0
0
09/12/2
012 18:0
0
09/12/2
012 20:0
0
09/12/2
012 22:0
00500
100015002000250030003500400045005000
0
20
40
60
80
100
120VS.RRC.Rej.ULCE.Cong
VS.RAB.FailEstabCS.ULCE.Cong
VS.RAB.FailEstabPS.ULCE.Cong
PS R99UL Payload(MB)
2. UL CE Cong. @ 13th Sept 2012 of site SITAPURA having high Cong. in UL.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
0
09/14/2
012 10:0
00
500
1000
1500
2000
2500
3000
3500
0
20
40
60
80
100
120
140VS.RRC.Rej.ULCE.Cong
VS.RAB.FailEstabCS.ULCE.Cong
VS.RAB.FailEstabPS.ULCE.Cong
PS R99UL Payload(MB)
3. UL CE Cong. @ 12th Sept 2012 of site SITAPURA having high Cong. in UL.
09/12/2
012 00:00
09/12/2
012 02:00
09/12/2
012 04:00
09/12/2
012 06:00
09/12/2
012 08:00
09/12/2
012 10:00
09/12/2
012 12:00
09/12/2
012 14:00
09/12/2
012 16:00
09/12/2
012 18:00
09/12/2
012 20:00
09/12/2
012 22:00
0
10
20
30
40
50
60
70
80
J Congestion Analysis -RRC Congestion Ra-tio
J Congestion Analysis - PS RAB Congestion Ratio
4. UL CE Cong. @ 13th Sept 2012 of site SITAPURA having high Cong. in UL.
09/13/2
012 00:0
0
09/13/2
012 02:0
0
09/13/2
012 04:0
0
09/13/2
012 06:0
0
09/13/2
012 08:0
0
09/13/2
012 10:0
0
09/13/2
012 12:0
0
09/13/2
012 14:0
0
09/13/2
012 16:0
0
09/13/2
012 18:0
0
09/13/2
012 20:0
0
09/13/2
012 22:0
0
09/14/2
012 00:0
0
09/14/2
012 02:0
0
09/14/2
012 04:0
0
09/14/2
012 06:0
0
09/14/2
012 08:0
0
09/14/2
012 10:0
00
10
20
30
40
50
60
J Conges-tion Analy-sis -RRC Congestion Ratio
J Conges-tion Analy-sis - PS RAB Congestion Ratio
6. DT ANALYSIS on the site after parameter changes :
Details Of R99 Upload during the DT , 200 MB File was being UP Loaded on the Sendspace Server.
1.1.4 Parameter optimization for Power and Code Cong. removal :
After the addition of CE card it has been observed that the Power and code cong. tends to rise sharply on the sites, so to counter that we alter the below parameters.
Thank You