jamal rehoming process overview 071108

Rehoming Process Overview

by

Jamal Arshad (LCC)July 11th, 2008

Rehoming Scenarios

• Rehoming to a different parent MSC• Rehoming to a different parent MGW• Rehoming to a different parent BSC

Rehoming Scenarios

• BSC Rehoming – Parent MSC changes

MSC(1) MSC(2)

BSC(1)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

Rehoming Scenarios

• BSC Rehoming – Parent MSC changes

MSC(1) MSC(2)

BSC(1)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

Rehoming Scenarios

• BSC Rehoming – Parent MGW changes

MGW(1) MGW(2)

BSC(1)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

MSS(1)

Rehoming Scenarios

• BSC Rehoming – Parent MGW changes

MGW(1) MGW(2)

BSC(1)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

MSS(1)

Rehoming Scenario

• Site Rehoming – Parent BSC changes

MSC(1)

BSC(2)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

BSC(1)

BTS(3) BTS(4) BTS(5)

Rehoming Scenario

• Site Rehoming – Parent BSC changes

MSC(1)

BSC(2)

BTS(2)BTS(1) BTS(3) BTS(4) BTS(5) BTS(6) BTS(7)

BSC(1)

BTS(3) BTS(4) BTS(5)

Why spend on Rehoming?

• Switch capacity• BSC capacity• Upgraded technology• Border optimization• Performance degradation

Switch Capacity Overloaded•BSC rehomed from MSS42\\MGW04 to MSS54\\MGW06

•Avoid chocking in switch

•A requirement from NSS

BSC Capacity Overloaded• 49 sites rehomed from IAB003_BSC1 and

IAB003_BSC3 to IAB004_BSC2 (S12)

BSC3i-600•600TRXs

•4500Erlangs

•124E1s upgradable to 252

BSC3i-2000•2000TRXs

•12000Erlangs

•378E1s

Upgraded Technology•Shorter setup time

•Shorter routing path

•Speech perception

•Pool structure possible

Upgraded Technology

Border Optimization

•BSC CP Load

•MSC CP Load

•Extra Location Updates

•Inter BSC HO delay

•KPIs’ degradation

•Bad design

Border Optimization

Border Optimization

Performance Degradation•Mismatch of BSC and MSC definitions•Sudden degradation of statistics

Performance Monitoring

• Drive Testing• Statistical monitoring

Drive Tester’s Check List• Inter BSC HO (both directions on all borders) • Inter MSC HO (both directions on all borders)• Intra cell HO (900 to 1800 and 1800 to 900) • Call drops• Call setup time• Inter cell HO • Location updates (both directions on all borders) • Speech codecs (AMR, Non AMR)• GPRS/EDGE• Calls from HOME PLMN to other PLMNs and vice versa• Emergency calls – Route verification• Subscriber distribution in VLRs (if pool activated)

Statistical Performance Monitoring

• Routine checks of all KPIs

Phase 5 Plan•IPW104_BSC2 •IJL005_BSC3 •IPW023_BSC2 •IPW104_BSC1 •LGT100_BSC2 •IPW023_BSC1 •IAB004_BSC2 •IAB004_BSC1, IAB003_BSC3, IIB103_BSC2 •IAB003_BSC1 •IPW751_BSC3 (28/38) •IIB213_BSC1•IRP310_BSC2 •IRP606_BSC1 •IPW751_BSC2

Thank you