Spectrum handoff decision algorithm with dynamic weights for cognitive radio networks
认知无线电网络中的动态权值频谱切换判定算法

To overcome the problem of coverage of underlay in cognitive radio networks,a multi-cell spectrum handoff scheme based on evaluation of coverage of underlay is proposed.Simple additive weights decision algorithm with dynamic weights (SAW-DW) in spectrum handoff is used to select a best target cell for continuing data transmission when secondary users exceed underlay constraint.Theoretical analysis and simulation results show that the scheme and algorithm can reduce probability of handoff failure and probability of service interrupt of secondary users and improve quality of service of secondary users.