sop for bss planning from optimization perspective-n-11

Doc #: E/ANPD/RFO/002 Issue # 1

Title: Paging analysis, LAC designing, BSC- Rev:

Commissioning, Site re-parenting from Optimization Perspective Date of Initial Issue: 01/09/2005 Date of Rev:

STANDARD OPERATING PROCEDURE

BSS Planning Issues from Optimization Perspective

PTML Confidential of 14




Document Name Document Version # Prepared by Date of Issue

BSS Optimization Parameters

Draft 1 Version 001

Ahmed Kamran

01-09-2005





1. Document Approval Matrix: Approved by Designation Signature Date of Approval

Ali Ahmed National Manager RF Optimization

Rehan Ahmed National Manager BSS Planning

Jafar Khalid GM Access Network Planning & Development

Aslam Khan VP Engineering





This page has been Intentionally left blank





2. Introduction: The purpose of this document is to standardize the procedure involved in “BSS Planning from Optimization Perspective”. 3. Scope: BSS level Optimization involves certain key parameters that involve BSS Planning inputs. The Scope of this document is to highlight various BSS related parameters that have an impact on Network Performance. Performing paging analysis.

1. Performing LAC optimization. 2. Site Re-Parenting. 3. BSC Re-parenting.

4. Procedure: Following is the step-wise procedure to cater for BSS Planning related issues from optimization perspective. Paging Analysis:

1. Paging stats from NSS are being monitored on monthly basis. 2. LACs having paging success rate less then 80% are filtered for further analysis. 3. LAC boundary areas with coverage issues are separated as paging success rate is

less for low coverage areas. 4. Cell level analysis are carried out initially and if required database parameter

changes related to channel configuration are carried out based on Traffic analysis. 5. Page related stats from the BSS are verified. (No. of repeats, time between

multiframes and Max Retrans Duration etc are fine tuned). 6. If no database discrepancy is being observed, then C7 signaling links are being

monitored for link occupancy and utilization. 7. NSS send the link utilization for each BSC on weekly basis. If the Link Occupancy

& Utilization is greater then 40%, immediate request is sent to NSS-Planning for increased C7 links.

8. OMCR send the BSC CPU Utilization report weekly for Load Calculations. 9. If Radio parameters are already fine tuned & Links have proper utilization then

issue is raised with BSS/NSS teams. 10. For certain cases where pages per second is exceeding the Hardware defined

limits, a red flag is raised with the BSS planning. 11. Regular stats are being shared mutually between BSS Planning & Optimization to

have optimized pages per second and to have better paging success rate. 12. To prepare a benchmark report for the analysis and future reference.





LAC Optimization:

1. Update the vector file of the entire central region and add a column of BSC name in that file.

2. Plot it in MapInfo and create a thematic map based on the LAC values by using contrasting colors.

3. Open a copy of the same vector file in Map Info and cerate a thematic map based on BSC Names.

4. Search for any discontinuity in the color codes. 5. In such areas propose an appropriate LAC and BSC and update the vector field

according to your proposals and then plot it again to verify your recommendations. 6. To check the existing subscriber per LAC basis. If the subscriber exceeds 90K per

LAC, a new LAC is proposed within the same location. 7. Pages per second analysis are to be carried out. These should not exceed the

BSS hardware Limitations. 8. No ill logical LAC boundary should be assigned. 9. To monitor the SDCCH blocking and SDCCH usage due to location update on

regular intervals. 10. To monitor the impact of LU on the BSS performance and load evolution stats on

per BSC basis. 11. C7 links utilization per LAC to be monitored. 12. If any of the issues appear, NSS & BSS planning are informed for New LAC. 13. New LAC is re-designed based on Optimized signaling distribution while keeping in

mind subscriber mobility, Subscriber density & radio signaling resources. 14. An Optimization plan is sent to BSS-Planning for approval and implementation. 15. To prepare a benchmark report for the analysis and future reference.

Site Re-parenting:

1. Verify the BSC boundaries accordingly. The boundary should be in the form of a cluster of sites for that BSC.

2. Perform LAC analysis and report for any discrepancies. 3. Create a thematic map on basis of LAC/BSC and point out the ill-logical BSC

Boundary or LAC boundary as justification for site re-parenting. 4. Pre-Post predictive traffic analysis for parent and target BSC. 5. Pre/Post count of TRX for parent/target BSCs. 6. Predictive count of Handover Analysis. 7. A-ter & Signalling load of the target BSC. 8. Target BSC Load evaluation analysis 9. On basis of LAC and BSC boundary analysis, forward any proposed re-parenting

of the sites. 10. The request to BSS-Planning for site re-parenting should follow the following form.

Site Site Current

LAC

Proposed LAC

Current BSC

Proposed BSC





11. Necessary approvals are:

a. NSS Operations (Cell ID and necessary Database verification) b. BSS Planning for BSC related tasks. c. Optimization for optimal performance during the post activity &

intimations to CS. d. BSS Operations for support during activity (in case of outages) & Field

confirmations regarding execution. 12. BSS-planning then coordinates with NSS/Billing/BSS-Operation for smooth activity.

BSC Re-parenting & Commissioning:

1. Verify the BSC boundaries accordingly. The boundary should be in the form of a

cluster of sites for that BSC. 2. Offloaded traffic analysis for parent and target MSCs. 3. LAC re-designing justification (for different LAC) 4. Predictive Handover Analysis 5. Predictive Subscriber management and Mobilibity analysis. 6. A-ter & Signalling load of the target BSC. 7. Target BSC Load evaluation analysis 8. Once BSC-Reparenting or commissioned is planned/endorsed, Optimization to

float the required Optimization plan as attached.

No.

Act

iviti

es

Task

s

Des

crip

tion

Res

pons

ibl

e Pe

rson

Tim

e Li

ne

Stat

us

1

Stats health check for Sites being re-parented along with BSC-reparent

actrivity.

BSC-X split Plan based on Optimization requirements.

2

Pre-Shifting Analysis

Neighbor Verification To check for all the neighbors defined as to

have the Pre Split Idea for proper Benchmark analysis during the DT.

3 Site Busy Status To verify and confirm that all the sites have been made busy after the BSC-X has been

commissioned/Re-parent to Target MSC

4

During BSC Split

Location Update timer for Re-parented/Newly commissioned BSC-X sites shall be changed

Lac verifcation from the DT and to check for proper LAC update in both directions.





to force the subscribers

on new LAC/MSC

5 Call Initialization Verification

Check from the OMC-R/NSS that the site is taking calls as per normal behaviour

6 Key stats

To check for the Initial Key stats of the sites after BSC-X Commissioning/Re-parent activity. To check for the problematic

sectors having abnormal KPIs to takle them on top priority.

Comprehensive Drive test of BSC-X will be carried Out. No Audios status to be also

confirmed during the Drive test.

7 Comprehensive Drive Test During the Drive test, Inter-BSS boundaries

will be worked out and verified.Inter-MSC Handovers and Location Update shall also

be tested.

8 Generic Drive Test Generic Drive test of BSC-X will be carried

out. This team will suggest any DB Parameters on the Spot.

9

Post BSC-

Shifting Analysis

BSC-X Health Report during this duration is to

be prepared

A consolidated report on the actions (if required) along with the health report of

BSC-x to be Presented

9. Necessary approvals are:

a. NSS Operations (Cell ID and necessary Database verification) b. BSS Planning for BSC related tasks. c. Optimization for optimal performance during the post activity & intimations to

CS. d. BSS Operations for support during activity (in case of outages) & Field

confirmations regarding execution.

10. BSS-planning then coordinates with NSS/Billing/BSS-Operation for smooth activity. 11. As part of Benchmark Optimization report, BSC re-parenting Post activity report

must contains the following: a. Handover analysis (Inter BSC, Inter MSC) and impact after the BSC re-

parenting using DT analysis. b. Site connectivity checks in terms of Key stats including Call Attempts, CSSR

& HSR. c. Datafill & neighbor verification after BSC re-parenting.





4. FLOW CHARTS:

Site Re-parenting Flow Chart:





Technical justification may include the following:

5. Pre-Post predictive traffic analysis for parent and target BSCs.

6. Pre/Post count of TRX for parent/target BSCs.

7. Predictive count of Handover Analysis.

8. A-ter & Signalling load of the target BSC.

9. Target BSC Load evaluation analysis

Necessary approval/confirmation:

5. NSS Operations (Cell ID and necessary Database verification)

6. BSS Planning for BSC related tasks

7. Optimization for optimal performance during the post activity & intimations to CS.

8. BSS Operations for support during activity (in case of outages) & Field confirmations regarding execution.

LAC justification

1. Parent/Target BSC LAC justification in terms of:

a. Signalling Load. b. Logical BSC

Boundary. c. Impact on Inter-

MSC Handovers.





BSC Re-parenting Flow Chart:

Necessary approval/confirmation:

1. NSS Operations (Cell ID and necessary Database verification)

2. BSS Planning for BSC related tasks

3. Optimization for optimal performance during the post activity & intimations to CS.

4. BSS Operations for support during activity (in case of outages) & Field confirmations regarding execution.

Technical justification may include the following:

1. Offloaded traffic analysis for parent and target MSCs.

2. LAC re-designing justification (for different LAC)

3. Predictive Handover Analysis

4. Predictive Subscriber management and mobilibity analysis.

BSC re-parenting Post activity report must contains the following:

1. Handover analysis (Inter BSC, Inter MSC) and impact after the BSC-reparenting using DT analysis.

2. Site connectivity checks in terms of Key stats including Call Attempts, CSSR & HSR. 3. Datafill & neighbor verification after BSC re-parenting.





LAC & Pagging Optimization Flow Chart:

BSS Planning from Optimization perspective

Monitor NSS paging stats

Filter LAC’s having paging

success rate <70%

Verify paging stats with BSS

Check Link Utilization and

take appropriate actions if it’s high

Filter out LAC boundary areas

with no coverage issues

Carry out cell level analysis and traffic analysis and take

appropriate actions

In case paging/Sec exceeds hardware

limits raise red flag with BSS-Planning

Paging Analysis

Update the Vector file and create a thematic

map in MAPINFO

Search for discontinuity in

color and propose an appropriate lac

Carry out pages per second analysis

Monitor Link Utilization and

SDCCH Blocking and inform

BSS/NSS incase of an issue

Check subscriber per LAC and propose a new

LAC where needed

Carry out cell level analysis and traffic analysis and take

appropriate actions

LAC Optimization

In case paging/Sec exceeds hardware

limits raise red flag with BSS

Re-design new LAC based on Optimized signaling distribution and send a report to BSS for approval





6. Actions to be taken: The recommendations made should be followed up with the respective departments. Benchmarking report shall be submitted by Optimization to present the overall Network element performance if required/requested.





End of Document


sop for bss planning from optimization perspective-n-11

Documents