Reference Signal (RS) Pollution Scenarios- LTE RF Optimization
Typical Reference Signal (RS) Pollution Scenarios
DL RS pollution is a situation in which there are two or more additional cells with DL RS of comparable values to the serving cell.
The difference in dB of these signals determine how bad the pollution is.
RS Pollution can happen throughout a network. Dense urban areas (where coverage tends to be good) tend to have more sites in close proximity, so there is opportunity for under-optimized sites to show up in unintended areas.
In suburban areas, cells tend to be farther apart (larger footprint), and there is less tall clutter, which can result in overshooting signals.
Certain geographical topography can prove conducive to DL RS pollution, in particular, in particular the so-called bowl deployments; where a city is in a valley, and a perimeter ring of hills have sites.
These sites have line-of-sight paths to areas they are not intended to cover, often resulting in RS pollution.
You may also like to go throughWhat is RF Optimization?,4G-LTE KPIs,3GPP Accessibility KPI,Retainability KPI in LTE, Throughput KPI & Latency KPI, Mobility KPI, Cell Availability KPI in LTE, Coverage of an LTE Cell, Cell-specific DL Reference Signal, UE Measurement- Reference Signal Received Power (RSRP), RSRQ and SINR, Coverage Analysis in LTE, What is the “right” coverage, What limits the coverage and Reference Signal Pollution with example.