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Informed Scheduling by Stochastic Residual Belief Propagation in Distributed Wireless Networks

机译:分布式无线网络中的随机残留信念传播的通知调度

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摘要

This letter devises a novel algorithm for cooperative spectrum sensing based on belief propagation (BP) for distributed wireless networks. The algorithm, called stochastic residual belief propagation (SR-BP), extends the use of residual belief propagation (R-BP) to distributed networks, improving the accuracy, convergence rate, and communication cost for cooperative spectrum sensing. We demonstrate that SR-BP converges to a unique fixed point under conditions similar to those ensuring convergence of asynchronous BP. Then, we develop a way to derive a probability distribution from the residual of each message. Finally, we provide numerical results to showcase the improvements in convergence speed, message overhead and detection accuracy of SR-BP.
机译:这封信为分布式无线网络设计了一种基于信念传播(BP)的协作频谱感知新算法。该算法称为随机残留置信传播(SR-BP),将残留置信传播(R-BP)的使用扩展到了分布式网络,从而提高了协作频谱感测的准确性,收敛速度和通信成本。我们证明SR-BP在类似于确保异步BP收敛的条件下会收敛到唯一的固定点。然后,我们开发一种从每个消息的残差中得出概率分布的方法。最后,我们提供了数值结果来展示SR-BP在收敛速度,消息开销和检测准确性方面的改进。

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