Investigation of handoff algorithms for GSM mobile cellular networks

الملخص EN

One of the main features of wireless cellular network is to achieve continuous (uninterrupted) services using handoff when mobile subscribers cross the boundaries of cells in the coverage area.

Handoff calls are usually given higher priority than new calls initiated.

Various algorithms are investigated using simulation and the results obtained show that the received signal strength with hysteresis and threshold in the serving cell (RSS-HTser.) And the received signal strength with hysteresis and threshold in the new cell (RSS-HTnew.) Are the two methods which are closely representing the cellular system environment since they contain additional constrains in Handoff (HO) execution.

Simulation are carried out by varying the governing parameters including the effects of fading on the received signal strength, averaging of signal strength, hysteresis and threshold, window size on average signal strength, and the standard deviation which represent worsening Signal fading.