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A slot-asynchronous MAC protocol design for blind rendezvous in cognitive radio networks

机译:认知无线电网络中盲交会的时隙异步MAC协议设计

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In cognitive radio networks (CRNs), two users have to rendezvous on a common available channel before communications. Most existing rendezvous papers focus on the channel-hopping (CH) sequence design. However, rendezvous may suffer from the handshake failure on the rendezvous channel, especially in unsynchronized-slot scenarios. In this paper, the challenge of slot-asynchronous rendezvous in CRNs is addressed for the first time. A protocol aiming to improve the handshake performance during the CH process is proposed. By analyzing the potential factors leading to the handshake failure, we design a novel MAC protocol with an optimal size of a time slot which can mitigate the effects of these factors and provide the shortest time for rendezvous. In addition, we also propose a probabilistic model for estimating the average rendezvous time under different CRNs. Simulation results validate our analytical model and demonstrate that our proposed protocol can achieve the rendezvous time close to the theoretical value under slot-asynchronous scenarios.
机译:在认知无线电网络(CRN)中,在通信之前,两个用户必须在一个公用的可用信道上会合。大多数现有的会合论文都集中在通道跳跃(CH)序列设计上。但是,集合点可能会遇到集合点通道上的握手失败,尤其是在不同步插槽的情况下。本文首次解决了CRN中时隙异步集合的挑战。提出了旨在提高CH过程中握手性能的协议。通过分析导致握手失败的潜在因素,我们设计了一种具有最佳时隙大小的新颖MAC协议,该协议可以减轻这些因素的影响并提供最短的集合时间。此外,我们还提出了一种概率模型,用于估计不同CRN下的平均会合时间。仿真结果验证了我们的分析模型,并证明了我们提出的协议可以在时隙异步情况下达到接近理论值的集合时间。

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