Modeling and analysis of opportunistic spectrum sharing with unreliable spectrum sensing
IEEE Transactions on Wireless Communications
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This paper presents a new channel allocation scheme, namely the dynamic partition with pre-emptive priority (DPPP) scheme, for multi-service mobile cellular networks. The system is modelled by a two-dimensional Markov process and analysed by the matrix-analytic method. A pre-emptive priority (PP) mechanism is employed to guarantee the quality of service (QoS) requirement of the real-time (RT) traffic at the expense of some degradation of non-real-time (NRT) traffic, while the victim buffer compensates the degradation and has no negative impact on the RT traffic. The complete service differentiation between new calls and handoff calls from different traffic classes is achieved by using the dynamic partition (DP) concept with the help of related design parameters. The performance analysis and numerical results show that the DPPP scheme, compared with the existing schemes, is effective and practical in multi-service environments. Copyright © 2006 John Wiley & Sons, Ltd.