Channel hand-off strategies in cellular mobile communication systems

This paper describes a computer simulation study of a cellular, land-mobile radio communications system with and without frequency hand-off strategies. We assume that cell boundary crossings for calls-in-progress exist. In the hand-off procedure, we have studied several strategies where channels are specifically reserved for hand-offs. These strategies have been evaluated in terms of the new-call rejection rate and the rate of premature terminations of calls-in-progress. In a second method, we have found the additional base station transmitter power required to service all the calls in progress without switching them to new channels. In addition, the cochannel interference introduced by this method has been evaluated and studied as a function of the additional transmission distance, with different partitions of channels, while maintaining a blocking probability of 2% or less.