SON (Self Organized Network) software automates various network optimization functions including automatic neighbor relations, coverage optimization, interference management, and sleeping cell detection and resolution. Key SON modules identify issues like crossed antennas, scrambling code collisions, and outage compensation. Intelligent reports in BSNL's KPI web portal provide insights into network performance and issues found through drive testing like orientation mismatches, cable swaps, and poor signal interference between sites.

1. Best Practices for Network
Improvement
BSNL TRAINING

2. Content
SON Server Modules.
Use of SON Server for Network Improvement.
Use of Intelligent reports in KPI Web Portal.
Post Processing Analysis of different Cases observed in 4G
DT.

3. Self Organized Network (SON)
SON is server based zonal tool optimization solution.
BSNL procured SON Servers for all four zones in PH VIII.4 project.
Few major functions that can be carried out using SON are
 ANR (Automatic Neighbour Relation): Addition/deletion/update neighbour
definition.
 Coverage Optimization: Optimizing coverage to compensate cell outage/traffic
management by adjusting antenna tilt (RET) and power.
 RF Optimization like SC Reuse, PRACH Optimization, GSM Freq Optimization.
 Sleeping Cell Resolution & Cross Antenna Detection.

4. Self Organized Network (SON)
 Main Input Requirement:- Accurate site location (Lat-Long) and cell
azimuth is the key factor to get best results from SON.
 SON can operate in Open loop & Close loop
 In open loop, changes are not directly implemented by SON but it will
generate output in a file containing recommended changes.
 In close loop, SON implements recommended changes automatically.

5. Self Organized Network (SON)
Important Modules of SON Server
 ANR – Automatic Neighbour Relationship (Addition/Deletion/Updation)
 SC (Scrambling code) reuse Module
 Crossed Antenna Detection Module
 Cell Outage Compensation Module
 Sleeping Cell Resolution Module

6. ANR Module (Automatic Neighbour Relation)
This module
defines the
neighbour based
on available cell
data.
Select the cells
from particular
BSC/Region

7. ANR Parameter to set before execution
Set the
Parameters like
Evaluation
period
Inter RAT/ Intra
RAT
Mode of
execution: Open
loop/Close loop

8. ANR Common Parameter Configuration
Select common
parameter Config file
which contains
Distance to be
considered for
addition/deletion of
relation
One directional or Bi-
directional
And default HO
parameters

9. ANR: Schedule the execution
Execution of module can
be scheduled for particular
time or can be executed
immediately

10. ANR: Result

11. MH Circle ANR Execution summary
No of Cells Operated
Neighbour relation
defined/Modified/
Deleted
No of Cells HOSR
Improved
No of Cells CDR
Improved
9852 41925 730 639

12. SC (Scrambling code) reuse Module Execution
This module detects the
SC collision and finds
possible SC changes.
Select the cells from
particular RNC/Region

13. SC (Scrambling code) reuse Module Execution
Set the Parameters like
Start & End of maintenance window:
SON execute recommended SC changes
during this time window in case of close
loop execution.
Max collision distance, Tier count, Min
HO attempts to detect collision, HO
monitor period.
Maximum iteration: if set higher than 1,
the module will try iterative approach to
find better solution
Mode of execution: Open loop/Close
loop

14. Module
Select common parameter
Config file containing default
set parameters.

15. SC (Scrambling code) reuse execution result

16. Crossed Antenna Detection Module
This module detects
Crossed Antenna based
on HO attempts & Success
from/to neighbour cells
and Physical data (Lat
Long, Azimuth)
Select the cells from
particular
BSC/RNC/Region

17. Set the Parameters like
Start Period: Period for evaluation of
HO with neighbour cells
Number of HO success from source
cell, Min HO activity, Min defined
adjacencies
Effective neighbour: Percentage of
effective neighbors expected to be in
pointing direction of the source cell
Crossed Antenna Detection Module execution

18. Site name Source cell Destination cell Vendor Technology Confidence
ANR518 ANR518UINO8ANR-2_NU_Rasulbldg ANR518UINO8ANR-3_NU_Rasulbldg Nokia UMTS Medium
ANR518 ANR518UINO8ANR-3_NU_Rasulbldg ANR518UINO8ANR-2_NU_Rasulbldg Nokia UMTS Medium
ANR536 ANR536RINO8ANR-3_NU_Daund Road ANR536RINO8ANR-2_NU_Daund Road Nokia UMTS Medium
ANR536 ANR536RINO8ANR-2_NU_Daund Road ANR536RINO8ANR-3_NU_Daund Road Nokia UMTS Medium
ANR527 ANR527RNBO8PRR-3_NU_Kadus ANR527RNBO8PRR-2_NU_Kadus Nokia UMTS High
ANR527 ANR527RNBO8PRR-2_NU_Kadus ANR527RNBO8PRR-3_NU_Kadus Nokia UMTS High
ANR045 ANR045RBSO8RHU-5_NU_DIGRASMPKV ANR045RBSO8RHU-3_NU_DIGRASMPKV Nokia UMTS High
ANR045 ANR045RBSO8RHU-3_NU_DIGRASMPKV ANR045RBSO8RHU-5_NU_DIGRASMPKV Nokia UMTS High
ANR420 ANR420RBSO8ANR-3_NU_AKOLNER ANR420RBSO8ANR-1_NU_AKOLNER Nokia UMTS Medium
ANR420 ANR420RBSO8ANR-1_NU_AKOLNER ANR420RBSO8ANR-3_NU_AKOLNER Nokia UMTS Medium
ANR450 ANR450UNBO8ANR-3_NU_SHRIRAMCHAUK ANR450UNBO8ANR-1_NU_SHRIRAMCHAUK Nokia UMTS High
ANR450 ANR450UNBO8ANR-1_NU_SHRIRAMCHAUK ANR450UNBO8ANR-3_NU_SHRIRAMCHAUK Nokia UMTS High
ANR525
ANR525UTLO8ANR-3_NU_Civil Hudco(Tarakpur Bus
Stand)
ANR525UTLO8ANR-1_NU_Civil Hudco(Tarakpur Bus
Stand)
Nokia UMTS High
ANR525
ANR525UTLO8ANR-1_NU_Civil Hudco(Tarakpur Bus
Stand)
ANR525UTLO8ANR-3_NU_Civil Hudco(Tarakpur Bus
Stand)
Nokia UMTS High
Crossed Antenna Detection result
Result contain name of cells (Source & Destination) which are crossed.
Confidence: Low/Medium/High indicates confirmation level of detected cross antenna.

19. Cell Outage Compensation Module
This module monitors the
target (Adjacent) cells for
outage. If outage is detected,
modifies the tilt and CPICH
power in increasing steps until
the cell is active again.
If congestion is detected on a
compensation cell after
mitigation, the mitigation is
reduced.

20. Cell Outage Compensation execution
Set the Parameters like
Antenna tilt/TxPower steps
Cell reset action request
Down time period, Include
manual downtime
Compensation cell frequency
layer: Same frequency or All
available frequency
Optimization goal: Voice or Data
Mode of execution: Open
loop/Close loop

21. Sleeping Cell Resolution Module
This module detects UMTS, LTE
cells that are sleeping due to
software defects, resets them
depending on how long they've
been off-air.

22. Sleeping Cell Resolution execution
Set the Parameters like
Number of consecutive
detections (15 min interval)
before resetting the cell
Reset count threshold
Reset window start & stop time
Mode of execution: Open
loop/Close loop

23. Sleeping Cell Resolution execution result
Cell RNC Region Vendor Resolution
AUR269RNBO8SOY-1_NU_MH_Nimbaiti RNC-503 netact1 nsn Requires Cell reset
AUR269RNBO8SOY-2_NU_MH_Nimbaiti RNC-503 netact1 nsn Requires Cell reset
NND218RNBO8KWT-2_NU_MH_PATODA RNC-503 netact1 nsn Requires Cell reset
KAL037UTVO8JAW-2_NU_MH_VIKRAMGAD2 RNC-505 netact1 nsn Requires Cell reset
KAL187RNBO8MUR-3_NU_MH_SHIVALE RNC-505 netact1 nsn Requires Cell reset
KAL280UINO8BHW-1_NU_MH_Padgha
Industries
RNC-505 netact1 nsn Requires Cell reset
KAL382UINO8VAS-2_NU_MH_Sopara Fata RNC-505 netact1 nsn Requires Cell reset

24. SON Benefits
To Sum up:-
SON serves as a comprehensive solution for optimizing
and fine-tuning various aspects of a mobile network,
ranging from neighbor relations and coverage to specific
RF parameters. This proactive approach helps enhance
the overall performance, efficiency, and reliability of the
network, ensuring a better user experience.

25. KPI Web Portal
 MH Circle has developed inhouse KPI WEB Portal for network performance
monitoring.
 Multivendor Support:- Includes Nokia, ZTE and Alcatel .
 Multi Technology Integrated Platform:- Includes Multiple Tech 2G, 3G, 4G and
traffic, KPI reports, availability reports are integrated in single portal.
 Intelligent Reports:- Along with regular KPI reports, intelligent reports are developed
to provide deeper insights into network behavior, predict potential issues, and
suggest optimization strategies.

26. KPI Web Portal

27. KPI Web Portal
Intelligent reports in KPI Web Portal

28. KPI Web Portal
BSC_RNC_NAM
E MHBANR01N1 SDCCH_CONG 0.21
SSA AHMEDNAGAR AVAILABILITY 100
SITE_ID ANR024 VLR 81
CELL_NAME
ANR024CNBO8ANR-
2_NG_MH_BALIKASHRAM FRM_LOSS_% 0.01
LAC 9521 MISS_EDCH_FRMS 14
CELL_ID 26462 PKT_LOSS 0
REMARK
Poor HOSR :- Check Neighbour List.
Poor HISR :- Check Neighbour List.
Radio module Fail:-Check the Hardware
Hardware (RRH). %_ABOVE_5KM 8
CDR 2.61 AVG_UE_DIST_KM 1.72
DROP_CALL_C
NT 4 NEAREST_SITENAME
ANR009CNBO8ANR-
NG_MH_CHITALEROAD
RTCH_SUCC 153 NEAREST_SITEDIST 0.51
HOSR 89.29 FREQ_FAIL 28
HISR 85.87 FREQ_RRH_FAIL YES
RTCH_CONG 0 VSWR NO VSWR
SDCCH_DROP 0.12 VSWR_INFO NA
Worst CDR Cell Report

29. KPI Web Portal
Example of Identification of Cell Overshooting using intelligent report

30. KPI Web Portal
Example of CDR, HOSR Issues due to High frame loss

31. KPI Web Portal
Linking of Hardware issues with KPI deterioration.

32. KPI Web Portal
Ping Test from Web Portal
Select site from Drop
Down
Change Packet Size
Change Packet Count
Submit
Ping Result

33. Drive Test & Post processing
case scenario

34. Case 1 – Orientation
mismatch

35. MEH035:- 1st and 2nd sector both coverage found in same direction, So
orientation is different then RF database

36. MEH263:- 1st sector coverage (PCI 483) found in opposite direction because of
either cable swap or Orientation difference then RF Database

37. MEH263:- 2nd sector coverage (PCI 484) found in opposite direction because of
either cable swap or Orientation difference then RF Database

38. Case 2 – Cable swap

39. MEH086:- Cable swap in 1st and 3rd sector

40. MEH086:- Cable swap in 1st and 3rd sector

41. Case 3 - Poor SINR

42. MEH008 & MEH247 :- Very poor SINR between these sites.

43. MEH247:- 1st sector coverage (PCI 447)

44. MEH247:- 3rd sector coverage (PCI 449)

45. MEH155:- Cable swap, No coverage of 2nd sector (PCI 427) found. 1st sector (PCI
426) is overshooting as well

46. MEH263:- 2nd sector coverage (PCI 484) found in opposite direction because of
either cable swap or Orientation difference then RF Database

47. MEH478:- 2nd sector coverage (PCI 478)

48. MEH478:- 3rd sector coverage (PCI 479)

49. End