Paging success rate can be degraded due to increase in MOC/MTC attempts, low TCH availability of source and neighboring cells, high LAC/BSC utilization. Following steps should be taken to analyze the root cause:
- Check for MOC/MTC trend - increase may cause high PPS (Paging Per Second) causing paging discards, indicating paging capacity limitation. LAC splitting could be done to resolve the issue
- Examine TCH Availbility of sites in the affected BSC
- Inspect cell level paging stats from the core network to zero in on the problematic LACs
- Parameter discrepancy between BSC and MSC can cause degradation - check parameters such as Location Update Timer, paging retransmissions by MSC, paging times etc.
- Interference, low coverage due to large distance or dense areas, path balance issues contribute to PSR degradation
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