NSN NSEI Planing and optimisation

1. NSEI Re-Planning Rule and Optimisation Experience Shi Wei

3. Why need tuning NSEI ?

4. Time Series of Application Throughput during Cell Re-selection (Example) Each Cell Re-selection leads To a “Service Gap”

5. Comparison of Application Throughput and Service Delay for Intra and Inter-PCU Cell Re-Selections Intra-PCU cell re-selections provide much better performance than inter-PCU re-selections! Number of Samples Throughput for Intra -PCU Re-selection [kbits/sec] Throughput for Inter -PCU Re-selection [kbits/sec] Duration of Intra -PCU Service delay [sec] Duration of Inter -PCU Service delay [sec] 369 18.30 11.39 4.59 9.02

6. Comparison of Throughput during Cell Re-Selection for old and new PCU Plan During the drive survey the number of intra-PCU cell re-selections has increased significantly. This will bring performance benefits. PCU Plan Route Throughput for Intra -PCU Re-selection [kbits/sec] Throughput for Inter -PCU Re-selection [kbits/sec] Number Intra -PCU Re-selection Number Inter -PCU Re-selection Average Throughput for all Cell Re-selections [kbits/sec] PRE A 18.71 9.94 31 59 12.96 PRE B 17.34 10.84 33 70 12.92 POST A 18.34 13.2 61 31 16.61 POST B 18.81 11.59 58 26 16.58

7. TSL/PCU, GTRX/PCU, Cell/PCU Comparison un- balance

8. PCU Congestion

9. Need information for NSEI Re-Planning

11. Interaction between Tasks NSEI Planning Determining Number of GPRS TSLs Determine number Of PCUs Optimise Adjacency Plan Missing/Obsolete Ensure cells are on right BSC Only if all tasks are addressed accurately will the NSEI-plan be optimal

12. Results from NSEI Planning

15. MapView of the old&new NSEI-JinJiang

16. MapView of the old&new - SiShi

17. MapView of the old&new - NanAn

18. 市区 NSEI 调整后的观察验证 -1 © 2005 Nokia V1- Filename.ppt / yyyy-mm-dd / Initials

19. 市区 NSEI 调整后的观察验证 -2 © 2005 Nokia V1- Filename.ppt / yyyy-mm-dd / Initials

20. 市区 NSEI 调整后的观察验证 -3 NSEI 调整后路测效果图：