Performance Analysis For Mobile Communication System With The Dynamic Channel Allocation Technology

With the scale expansion of mobile communication system, mobile service gradually towards pluralism, needs to maximize the utilization of radio resources under the conditions of the limited radio resources. In the wireless cellular mobile communication system, channel resources are scarce .Those limited resources have to be re-used in different cells to supply more capacity for the system. DCA is one of its core technology, effective DCA algorithms can bring into full play to flexibility in the allocation of system resources and improve spectrum utilization.This thesis studies performance of mobile cellular system based on the DCA on the basis of the channel allocation in the radio communication system, sets up mathematical model of the system with a two-dimensional QBD model of limited level and background, by solving the steady-state distribution of the corresponding random process, gets call blocking probability, carried traffic and frequency of call dropping. This thesis compares system performance under the FCA strategy and DCA strategy. Simulation results show that the DCA strategy to improve system performance is far superior to FCA strategy, and further reveal the advantages of the DCA technology in the improvement of spectrum efficiency.The organization of this thesis is as follows. The first chapter briefly describes the background and significance. The second chapter introduces the radio resource management and channel allocation knowledge. The third chapter sets up a mathematical model with QBD method. The fourth chapter compares system performance. The last chapter summarizes the work, and shows the direction for further research.