Capacity Improvement and Analysis of VoIP Service in a Cognitive Radio System

The authors herein analyze the capacity of Voice Over IP (VoIP) and propose a new method for finding the minimum detection and false-alarm probabilities to ensure the Quality-of-Service (QoS) requirement of VoIP users in a cognitive radio system. They propose a model for the system supporting the VoIP service as a 2-D Discrete-Time Markov Chain (DTMC). The VoIP traffic and wireless channels in the cognitive radio system are described as a Markov-Modulated Poisson Process (MMPP) model and a Markov channel model, respectively.