Pilot pollution occurs when the number of candidates eligible for the active set exceeds the active set size. To address pilot pollution, one should perform a drive test to locate the polluted area, verify and adjust the neighbor list by removing unmeasured neighbors and adding missing ones, check if the pollution is coming from an overshooting site or nearby site, and adjust the physical configuration and CPICH power as needed.

1. Pilot Pollution
Md Joynal Abaden
+880 1830 457 155
joynalabaden@gmail.com
RF Solution Department

2. Pilot pollution
When the Number of Candidates eligible of Active set becomes greater than the
active set size then Pilot pollution occurs.

3. Recommendation & Solution of Pilot pollution
• perform scanning (via drive test)
• Locate pollutant area
• Do Neighbor list verification
– Remove neighbors those are not measured but are in
Neighbor list
– Add missing neighbor
• Check pollutant, whether it’s from overshooting
site or site nearby
• Check and Adjust physical configuration
• Check and Adjust CPICH Power