Signal to Insight

WCDMA  ·  mobility analysis The most serious network issues no longer sit neatly inside individual cells. They appear in the transitions between them. Voice traffic keeps growing, smartphones are becoming common, and users are no longer staying still. Cells show solid coverage and acceptable KPIs, yet dropped calls continue. Almost always during movement. Walking short distances, driving along roads, or shifting slowly indoors triggers failures that static testing cannot reproduce. Mobility failures are path problems, not cell problems. That single realization changes how the whole analysis is approached. Handover failures at cell boundaries In several WCDMA clusters, radio link failures happened repeatedly at specific cell edges. The serving cell looked healthy. The target cell looked healthy. The handover transition itself was unstable. Serving cell: CPICH Ec/No = -8 dB, RSCP = -78 dBm -- acceptable Target cell: CPICH Ec/No = -9 dB, RSCP = -81 dBm -- ac...