Modeling and simulation of integrated voice/data cellular communication with generally distributed delay for end voice calls

Cellular networks are gradually shifting from voice only to voice and data due to increased demand for WWW, FTP and multi-media messaging. This has substantially increased the volume of cellular data traffic. Schemes have been proposed for co-existence and fair sharing of the available bandwidth between circuit switched voice and packetized data traffic. One popular scheme is based on delaying the last incoming acceptable voice call for a random amount of time and utilizing this time to service the accumulated data traffic to prevent excessive queuing delay in delivering the data traffic. However, this delay time has been usually modeled as being exponentially distributed. In this paper, this delay is modeled as a uniformly distributed random variable instead. This scheme is extended by delaying more than one call. Performance measures like voice and data blocking probability is plotted as function of last call delay