Kolkata network improvement plan

12-May-2015

Ericsson Internal | 2015-05-12 | Page 2

Issues highlighted by business

• cdma network issues in some pockets

• cdma call setup issues

• gsm network issues in some pockets

• aircel icr data issues & overall 2g data issues

• 3g data issues in some pockets

• signals vanishing in 3g/2g in some areas

• call centre coverage / quality issues - salt lake area

Ericsson Internal | 2015-05-12 | Page 3

• cdma network issues in some pockets

• cdma call setup issues

Ericsson Internal | 2015-05-12 | Page 4

perspective

Zero Call Sites

HW Fault Sites 237 Sectors (87 Sites ~20%

of total Sites) are in Zero Calls

• 3 Sectors – 74 Sites

• 2 Sectors – 2 Sites

• 1 Sector - 11 Sites

46 Sites having HW fault /

Spares Issues

• 3 Sectors - 35

• 2 Sectors - 0

• 1 Sector - 11

Ericsson Internal | 2015-05-12 | Page 5

Zero Call Sites

HW Fault Sites

HST Sites

136 Sites have PAC Alarms

– Another 30% of total Sites have

High Shelter temperature

C2PAM/HEPAM gets hanged which

needs soft / hard reset before it starts

taking calls again

AFT/DFT (Fan tray) also goes faulty

during high temp

Likelihood of increase in Hardware

faults

Further impact on customer

perception

perspective

Ericsson Internal | 2015-05-12 | Page 6

Cdma hygiene issues

› Accessibility & Quality KPIs are badly hit since last few months› Impacting Customer Perception in a big way

Ericsson Internal | 2015-05-12 | Page 7

Illustration of increase in ageing

Ericsson Internal | 2015-05-12 | Page 8

Alarms clearance

Following alarms clearance is in WIP by filed team

Ericsson Internal | 2015-05-12 | Page 9

Cdma dt Activities

done till date & planned

Ericsson Internal | 2015-05-12 | Page 10

Kolkata cdma drive test routes

I : Airport To chingrighata II : AIRPORT TO cit Road III : PARKCIRCUS TO RELIANCE HOUSE

50% routes completed ; balance in wip

Ericsson Internal | 2015-05-12 | Page 11

Airport to Chingrighata MTx_Power

Ericsson Internal | 2015-05-12 | Page 12

Airport to Chingrighata-- Ec/Io

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Airport to CIT MTx_Power

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Airport to CIT –Ec/Io

PATCH-1

PATCH-4

Ericsson Internal | 2015-05-12 | Page 15

RHK To ParkCircus MTx_Power

Ericsson Internal | 2015-05-12 | Page 16

RHK To ParkCircus Ec/Io

Patch-2

Patch-3

Ericsson Internal | 2015-05-12 | Page 17

Observation & action planPatch-1

Poor Coverage Patch found near Raja Bazar due to the nearest site Rajabajar which is declared NOP.

Patch-2

Poor Patch found near Ho Chi Min Sarani due to Ho chi min Sarani Site down due to High temperature issue.

- Already escalated to Frontline Team.

Patch-3

Due top Spare issue Beck Bagan is not radiating. This place is being served by far away site Lords Building.

- To improve the coverage we need to resolve the spare issue

Patch-4

VIP Kestopur S3 not radiated during Drive Test.

- Site visit and redrive planned. Target date-19th May.

Ericsson Internal | 2015-05-12 | Page 18

› Call Setup time for CDMA Offnet & Onnet call tested through UXCP signalling trace was found to be approximately 2 Sec which is as per the TEC norms

› But this may vary as per various call scenarios like in Roaming, NLD or being in a poor coverage area

Further Actionables› Besides high nos of sites having HST and HW alarms being one of the

contributors for poor call set up, following activities will be additionally taken up in next 2 weeks for CSSR improvement

– Diagnosis for 35-70 odd Sites having frequent packet pipe alarms on daily basis

– 50-100 Sites having E1 down issues on daily basis

CDMA call set up issues

Ericsson Internal | 2015-05-12 | Page 19

• gsm network issues in some pockets

• aircel icr data & overall 2g data issues

Ericsson Internal | 2015-05-12 | Page 20

GSM dt Activities

done till date

Ericsson Internal | 2015-05-12 | Page 21

Kolkata GSMdrive test routes

I : RHK to Bally via CR Avenue, BT road. II : Bally to airport via belghoria exp.III : Airport to science city via rajarhat bypass, sec-v. IV : Airport to beckbagan via VIP road, AJC bose road.

Ericsson Internal | 2015-05-12 | Page 22

Patch-7

Patch-6 Patch-5

Patch-3

Patch-8

Patch-9

Patch-2

Patch-1

Patch-4

coverage plot- RHK to Bally via CR Avenue, BT road. Bally to airport via belghoria exp.Airport to science city via rajarhat bypass, sec-v. Airport to beckbagan via VIP road, AJC bose road.

Ericsson Internal | 2015-05-12 | Page 23

Patch-3

Patch-4

Patch-2

Patch-10

Patch-11

Patch-12Patch-14

Patch-15

Patch-13

Patch-16

Quality plot- RHK to Bally via CR Avenue, BT road. Bally to airport via belghoria exp.Airport to science city via rajarhat bypass, sec-v. Airport to beckbagan via VIP road, AJC bose road.

Ericsson Internal | 2015-05-12 | Page 24

Observation and action plan

Patch-1 and Patch-10 : MANIKPUKUR_MANASBHUMI Sec-1st optimization planned for coverage improvement.– Site visit and optimization planned. Target Date – 14 th May

Patch-2 and Patch-11 : Previously this area served by TEHGHORIA site. Coverage patch observed after TEHGHORIA site got NOP. Optimization not feasible for this area.

Patch-3 : SALTLAKE-CJ-BLOCK-15 optimization planned for coverage improvement.– Site visit and optimization planned. Target Date – 13 th May Completed

Patch-4 : SALTLAKE-SEC5-6 and SALTLAKE-EE-BLOCK-19 optimization planned for coverage improvement.– Site visit and optimization planned. Target Date – 13 th May Completed

Patch-5 : SALTLAKE-SEC5-NEW-7 optimization planned for coverage improvement.– Site visit and optimization planned. Target Date – 13 th May Completed

Patch-6 : SALTLAKE-FE-BLOCK-1, SALTLAKE-IA-BLOCK-17, SALTLAKE-IC-BLOCK-13 and SALTLAKE-CHARNOCK-CITY-3 optimization planned for coverage improvement.

– Site visit and optimization planned. Target Date – 13 th May Completed

Patch-7 : Previously this area served by NRS-HOSPITAL-9 site. Coverage patch observed since NRS-HOSPITAL-9 site is down and restoration is pending due to Access Issue.

Ericsson Internal | 2015-05-12 | Page 25

Observation and action plan:

Patch-8 : SALTLAKE-BD-BLOCK-26 optimization planned for coverage improvement.– Site visit and optimization planned. Target Date – 13th May Completed

Patch-9 and Patch-16 : Previously this area served by LAKE_TOWN_B_BLK site. Coverage patch observed since LAKE_TOWN_B_BLK site is down and restoration is pending due to Access Issue.

Patch-12 : Quality patch observed since coverage is weak due to high inter-site distance.

Patch-13 : Previously this area served by RAJA-BAZAR-8 site. Patch observed after RAJA-BAZAR-8 site got NOP.

– Site visit and optimization planned. Target Date – 13th May Completed

Patch-14 : Previously this area served by ESPLANADE-25 Sec-3rd but since this site burnt patch observed. DHARMATALA-26 Sec-2nd optimization planned.

– Site visit and optimization planned. Target Date – 13th May Completed

Patch-15 : SURYASEN-ST.2-51 Sec-1st optimization planned for quality improvement. – Site visit and optimization planned. Target Date – 14th May

Ericsson Internal | 2015-05-12 | Page 26

Kolkata GSMdrive test routes

I : hesting to joka.

Ericsson Internal | 2015-05-12 | Page 27

Coverage plot- Hesting to joka route

Patch-1

Patch-2

Ericsson Internal | 2015-05-12 | Page 28

quality plot- Hesting to joka route

Ericsson Internal | 2015-05-12 | Page 29

post optimization Remark:

Patch-1: Optimization tried but no improvement observed.

Patch-2: Post optimization coverage patch Improved. Pre-Post DT plot is in trailing…

Ericsson Internal | 2015-05-12 | Page 30

Coverage Patch-2Pre Post

Ericsson Internal | 2015-05-12 | Page 31

Kolkata GSMdrive test routes

I : NSC Bose Road II : Ashutosh Mukherjee RoadIII : MG Road, IV : SC Mallick RoadV : EM Bypass

Ericsson Internal | 2015-05-12 | Page 32

Coverage plot- NSC Bose Road, Ashutosh Mukherjee Road, MG Road, SC Mallick Road, EM Bypass

Patch-2

Patch-1

Patch-3

Patch-4

Patch-5

Ericsson Internal | 2015-05-12 | Page 33

Patch-10

Patch-6

Patch-7

Patch-9

Patch-8

quality plot-NSC Bose Road, Ashutosh Mukherjee Road, MG Road, SC Mallick Road, EM Bypass

Ericsson Internal | 2015-05-12 | Page 34

Observation and action plan:Patch-1 and Patch-9 : FARTABAD site not radiated during drive, so coverage and quality patch observed.

Patch-2 : On GARIA_MORE Sec-1st and GARIA_GACHTALA Sec-2nd optimization planned for coverage improvement.

– Site visit and optimization planned. Target Date –6th May Completed

Patch-3 : KAURAKUPUR Sec-1st and KOBERDANGA_NORTH Sec-1st not served properly during drive test. – Site visit and optimization planned. Target Date –7th May Completed

Patch-4 and Patch-8 : BONDEL-GATE-7 Sec-1st optimization planned for coverage improvement. – Site visit and optimization planned. Target Date –8th May Completed

Patch-5 : Previously this area served by BANDIPUR site, coverage patch observed after BANDIPUR site got NOP.

– Site visit and optimization planned. Target Date –9th May Completed

Patch-6 : TOPSIA-RD-22 Sec-3rd optimization planned for quality improvement. – Site visit and optimization planned. Target Date –10th May Completed

Patch-7 : PANCHANANGRAM Sec-1st optimization planned for quality improvement. – Site visit and optimization planned. Target Date -11th May Completed

Patch-10 : PARK-CIRCUS-4-NO.-BRIDGE-19 Sec-3rd optimization planned for quality improvement. – Site visit and optimization planned. Target Date –11th May Completed

Ericsson Internal | 2015-05-12 | Page 35

› A new Frequency Plan will help improve Quality further

› Kolkata AFP on 12 BSC areas planned in May-June cycle

› Pre MR collection activities in progress– TRX Grow / Degrow to be completed by 18-May

KOLKATA AFP

Ericsson Internal | 2015-05-12 | Page 36

› DT of Aircel NW for Data will begin shortly on all those pockets not carrying EDGE/GPRS to have a better understanding

› Likelihood of high voice utilization which preempts dynamic data Time Slots in Aircel network in those pockets

Aircel ICR DATA Issues

Ericsson Internal | 2015-05-12 | Page 37

• 3g data issues in some pockets

• signals vanishing in 3g/2g in some areas

Ericsson Internal | 2015-05-12 | Page 38

Orissa 3G network is very high on Data– Data has increased from 10TB to >12TB since last 3 months

Orissa 2 RNCs having very high CPU Utilization, after module optimization its reduced up to 70%.

– Some RCB pairs splitted till now Still having CPU Utilization 70%.– Best Case Module optimization have been done.

Best case Sites rehoming have also been done from RNC 28 to RNC- 29 to Improve NWA before it was affected due to Multiple Fiber cut. RNC-28 is 2 way protected after rehoming it has mutilprotection path.

All 3 RNCs are having CS & PS Access failure high due to maximum sites having CE utilization High.

Increasing trend of high Uplink CE Utilization > 70%– 160 Sites have high CE utilization requiring BPC cards to reduce Uplink CE

Utilization.

perspective

Ericsson Internal | 2015-05-12 | Page 39

Best cases Sites rehoming Details

Affected:-

1) Revenue Loss for RCOM

2) NWA poor Below 50%

3) KPI Impacting.

Plan:-Rehomed both town to RNC-29, NWA, Traffic & KPI Improved.

Issue:-NWA Poor was for RNC-28 (Sambalpur and Burla town) due to Multiple Fibercut. RNC-28 is 2 way protected. Usually fiber cut happens between Ranchi- Thorpa, Sambalpur- Sohela, Sambalpur –Sundargarh, Sundargarh- Rourkela.

Pre Post

Ericsson Internal | 2015-05-12 | Page 40

Pre and Post NWA After Rehome Activity Completed

PRE POST

Above trend showing NWA improved at least 50% after rehomed.

Ericsson Internal | 2015-05-12 | Page 41

Pre-Post DATA Traffic 24hrs & KPI After Rehoming

24hrs Data Payload Traffic Growth:

NBH KPI:

SambalpurBurla Town

Ericsson Internal | 2015-05-12 | Page 42

Plot of high ce utilized sites

30% Sites (410) have

CE>70% Util

Another 10% (123) have

CE Util 60-70%

40% of the total Sites carry

-69% of total CS Traffic

-61% of HSPA Payload

-68% of R99 Payload

High concentration seen around

Central Kolkata

Only 533 Sites

Gives 8.5 TB

out of 14TB

Ericsson Internal | 2015-05-12 | Page 43

CS drop

Stats based on 06-May OSS Data

Of the 1476 Non meeting cells 1018 are LCV <100 RAB Attempts

~70% of the cells are LCV

Ericsson Internal | 2015-05-12 | Page 44

PS drop

Stats based on 06-May OSS Data

Of the 893 Non meeting cells 130 are LCV <100 RAB Attempts

~15% of the cells are LCV

Ericsson Internal | 2015-05-12 | Page 45

Alarms clearance

16 Cells having consistent (hourly) RTWP high. WIP from FSO team

Alarm Description No of Sites Dependency RemarksVSWR 3 FSO/RCOM Feder cable Issue, RSU FaultyPower amplifier disable 3 FSOHigh Temprature 7 UtilityBoard communication Link Alarm 8 FSO/RCOMApplication software monitoring alarm 11 FSOSCTP Path broken 6 FSO

Ericsson Internal | 2015-05-12 | Page 46

Kolkata 3Gdrive test routes

I : JESSORE road airport to nager bazar II : nager bazar to dum dum stationIII : howrah shivpur-bally via gt roadIv : pailan to sirakol in wip

PRE POSTRSCP Plot (Coverage)

PATCH-1

PATCH-1

PATCH-2 PATCH-

2

PATCH-3

PATCH-3

Ericsson Internal | 2015-05-12 | Page 48

PATCH-1 PRE

POST

After optimize Hanuman Mandir and Nager Bazar site Coverage patch was improved

Ericsson Internal | 2015-05-12 | Page 49

PATCH-2

PRE POST

After optimize Khudiram Bose Road site Coverage patch was improved

Ericsson Internal | 2015-05-12 | Page 50

PATCH-2PRE POST

After optimize Khudiram Bose Road site Coverage patch was improved slightly. As Jessore Road Site’s Height is 17mtr patch area is not covered properly. Also ordinance factory & Jessop Factory block the signal.

Ericsson Internal | 2015-05-12 | Page 51

Howrah Sandhya Bazar to Bally Via GT Road

PATCH-1

PATCH-2

COVERAGE (RSCP) PLOT

Ericsson Internal | 2015-05-12 | Page 53

QUALITY (Ec/No) PLOT

Ericsson Internal | 2015-05-12 | Page 54

PATCH-1 PATCH-2

Patch1: Poor RSCP observed near Salkiya New Site as the site was decread as NOP.

Patch2: Poor RSCP observed near Sivpur Site as the site was decread as NOP. And we try to resolve the patch by optimize Shibpur_North site & Howrah Maidan but Shibpur_North site having only 18 mtr antenna height and high rise building block the 2nd sector signal. Howrah Maidan site having access issue.

Ericsson Internal | 2015-05-12 | Page 55

› Post complaint from CBH we organized a walk test at RHK and did not find such issues

– Downlink Power Congestion observed at RHK Beta sector due to neighbour site HoChi Minh Sarani Site down

› Under observation and will be taken up during DT activities in other areas with Sales / Business team

Signals vanishing / latching issue in 3g/2g @ rhk

Ho chi min Sarani site down since 12 April

Power blocking in Beta sector of rh

High utilization in Beta sector of rh

Ericsson Internal | 2015-05-12 | Page 58