EVDO Connection Drop Optimization steps

1. Extract Worst Performing Dropping Sectors
Check Coverage
Issue
Raise ERTT Ticket and TRAMS
Ticker as well if site is NH Pass
site.
Tools: Cockpit/SPOT, ERTT,
TRAMS
Check Power Parameters ,
Check Dominant PN,
Run Spectrum Sweep for
Interference, Physical optimization
if required (Last option),
Tools: Cockpit/SPOT, CACP,
GEMS, Secure CRT, NEWTUN
End
Start
Issue Resolved
?
Open ERTT and Intimate
Capacity Team to add CEs
Propose EVDO carrier Add,
Tools: Cockpit/SPOT, Secure
CRT, CACP, CPS
Check Internal or External
Interference,
Rogue Devices,
Offload Traffic if Possible.
Tools: Cockpit/SPOT, TRAMS
Diversity Alarm
(RSSI issue)
Faulty T1s/SIU/CSBDA Combiner/IPBH
Faulty RF Modules
Weak Forward Link
Weak Reverse Link
Coverage Foot Print
Mismatch
Coverage Holes
Reverse Link
Interference
RL Load
Pre- Post Report
Analysis
EVDO Connection Drop OPTIMIZATION
GSI RF
OPTIMIZATION
Check RF Issue
Check Capacity Issue
Other Issues
Yes
Yes
Forward Link
Interference
Pilot Pollution
(Lack of Dominant PN)
Check Neighbor
Issue
Update Neighbor List Using HO
Matrix,
Check PN Planning
Tools: NEWTUN, CPS
Missing Neighbors
Neighbor Priority IssueYes
CE Blocks
MAC ID Blocks
Max No of Connection Reached
T1 Slot Occupancy (>80%)
No
Check Network Availability of Neighboring
Sites
PDSN Issue
Rogue Devises
No
No
Yes
Yes
Open ERTT/NTAC ticket for the
outage and PDSN Issue,
Find out Rogue devices and
request to fix them.
Yes
Wrong PN Assignment/PN Conflict
Check Hardware Issue
Check HO Issue
Check HO Parameters Like Tadd,
Tdrop, IFHO Settings, A13 Link
and Session transfer status
Tools: Cockpit/NEWTUN, CPS
Virtual Soft Handoff Issue
Inter Frequency Hand Off IssueYes
Inter AEC Handoff Issue
No
Check RF
Resource Issue on
Neighboring Sites