RF Planning and Optimization
RF planning and optimization is one of the key services offered by Smartec-Group. Applying the recommendations coming out of this service for GSM, UMTS and LTE systems will result in decreasing dropped calls by identifying areas with poor coverage, coverage gaps and improper Soft handover areas. This service also identifies areas with increased interference and pilot pollution, which happens due to excessive coverage. The service identifies long and short range cells and recommends adjusting the tilt and power, resulting in better network coverage and filling coverage holes and ultimately decreases the interference level and the Block call rate. This will be translated into improving the customer experience by reducing complaints due to low signal or out of coverage areas. This service is divided into four different functions:
1- Cell coverage estimation is used to identify both overshooting cells and cells with limited footprints. Detection of these cells will enhance important KPIs such as DCLR and Handover success rate in addition to decrease interference level and block error rate. Recommendations will be in the form of automatic corrective actions by adjusting antenna parameters, such as tilt and power. RF analysis includes coverage visualization on maps, propagation delay statistics and signal quality maps (RSCP, EcNo)
2- Pilot pollution is a type of interference in 3G networks where the pilot code from a distant cell is powerful enough to interfere with a different cell. Pollution analysis identifies top polluters and polluted cells as well as the overall pilot pollution percentage network wide.
3- Cross-feeder problem occurs when the feeders of two antennas are mistakenly swapped. In this case, the actual neighbors for these cells will be in different directions compared to the defined neighbors. This problem will affect handover and may lead to high count of dropped calls and handover failures. Our service identifies cross-feeder cells.
4- Load balancing is reached by temporary changing cells’ coverage to distribute the load between the loaded cell and its neighbors. Continuous monitoring of traffic and radio resources utilization will determine which cells to offload based on predefined thresholds. Dynamic load sharing will be both area and season dependent.