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GSM Radio Frequency optimization
GSM Radio Frequency Optimization (GSM RF Optimization) is the optimization of GSM radio frequencies.
GSM network consist of different cells and each cell transmit signals to and receive signals from the mobile station, for proper working of base station many parameters are defined before functioning the base station such as the coverage area of a cell depends on different factors including the transmitting power of the base station, obstructing buildings in cells, height of the base station and location of base station.
Radio Frequency Optimization is a process through which different soft (Cell Reselect Offset, BTS power) and hard (e.g. Electrical Tilt, Mechanical Tilt, Azimuth etc.) parameters of the Base transceiver stations are changed in order to improve the coverage area and improve quality of signal. Besides that there are various key performance indicators which have to be constantly monitored and necessary changes proposed in order to keep KPIs in agreed limits with the mobile operator.
== Introduction ==
Optimization is an important step in the life cycle of a wireless network. Drive testing is the first step in the process, with the goal of collecting measurement data as a function of location. Once the data has been collected over the desired RF coverage area, it is output to post-processing software. Engineers can use the collection and post-processing software to identify the causes of RF coverage or interference problems and determine how these problems can be solved. When the problems, causes and solutions have been identified, steps are performed to solve the problems. Network statistics are also an important step in analysis and troubleshooting of RF issues. Every node (BTS, BSC, MSC) has its own counters some of which are incremented/decremented on occurrence of different events e.g. a dropped call due to low signal strength. These statistics are analysed using different graphs and reports and when KPI from the statistics exceed the limit, extensive analysis is carried out to identify and troubleshoot the problem.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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