A guard channel strategy with preemptive priority in cellular system
Wei Xin-gang · Journal of Lanzhou University of Technology · 2011
A channel assignment strategy of voice/data call for cellular mobile communication system was proposed on the basis of analysis of channel assignment of that system.In this strategy the channel was divided into three parts: data channels,new voice call guard channels and handoff voice call guard channels.The guard channels for new voice calls and handoff voice calls were used to reduce their blocking probability.To further improve the voice traffic in the system,voice calls took preemptive priority and could preempt data channels.In addition,the new voice guard channels could be occupied by handoff voice calls.Queue buffers were provided for data calls to reduce the data blocking probability.The simulation results showed that the proposed strategy could effectively lower blocking probabilities and improve system performance.