Adopting Makov’s Chain Queuing Model in Channel Allocation

Abstract

This paper proposes a novel approach to dynamic channel and packet assignment (DCPA) scheme to serve efficient circuit-switching in voice traffic and packet-switching for Internet traffic communications in wireless cellular networks. The DCPA, as a distributed-controlled scheme, assigns channels or packet-slots to handoff and new calls based on their traffic type and channel status of cells. When the blocking probabilities of handoff and new calls in a cell become unacceptable, then the cell requests its neighboring cells to move appropriate free channels if possible. The rest of this work presents the DCPA algorithm, uplink service access, and the frame structure used in packet-based communication. Markov chain model is used for calculating blocking and dropping probabilities of the proposed DCPA scheme. An algorithm was developed to realize a model which is able to capture the properties of both voice and data traffic. Simulation results, based on a circuit-switching and packet-switching traffic model, show that the DPCA scheme provides better QoS than a dynamic channel allocation scheme designed for circuit-switching communications only.