多跳认知无线Mesh网络中频谱决策与路由的跨层设计

灵活高效的频谱共享技术能够实现频谱资源的最大化利用，有效地缓解了无线频谱紧缺的现状。在一个与TDMA/FDMA蜂窝网络共存的多跳认知无线Mesh网络环境下，基于覆盖式（Underlay）与机会式（Overlay）相结合的频谱共享机制，提出了一种有效的链路层频谱决策与网络层路由的跨层设计方案。仿真结果表明，该方案比基于最小跳数的随机信道选择算法在网络端到端传输性能上有显著的优势。

Cross-layer Design between Spectrum Decision and Routing in a Multi-hop Cognitive Wireless Mesh Network

A flexible and high-efficient spectrum sharing technology can achieve the maximum use of spectrum resources, which relieves the current situation of spectrum shortage availably. In a multi-hop cognitive wireless mesh network coexisting with a TDMA/FDMA cellular network, an effective scheme of cross-layer design between link-layer spectrum decision and network-layer routing was proposed, based on the combination of spectrum underlay and spectrum overlay. Simulation results verify that the scheme distinctly outperforms the minimal hops based random routing algorithm on network end-to-end performance.