无线多跳网络中一种基于网络编码的机会路由  

Opportunistic Routing with Network Coding in Multi-Hop Wireless Networks

作　　者：袁永琼[1] 

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2015年第3期276-281,共6页Modern Navigation

摘　　要：近年来机会路由和网络编码是两种利用无线信道广播特性提高网络性能的新兴技术。相比传统的静态路由决策,机会路由利用动态和机会路由选择减轻无线有损链路带来的影响。网络编码可以提高网络的资源利用率。但编码机会依赖于多个并发流所选路径的相对结构。为了创造更多的网络编码机会和提高网络吞吐量,本文提出了一种基于流间网络编码的机会路由(ORNC)算法。在ORNC中,每个分组转发的机会路径选择是基于网络编码感知的方式进行的。当没有编码机会时,采用背压策略选择下一跳转发路径以平衡网络负载。仿真结果表明本文提出的ORNC算法能够提高无线多跳网络的吞吐量。Recently opportunistic routing and network coding are two promising technology to achieve significant performance gain by exploring broadcast nature. Comparing with traditional static routing decision strategies, opportunistic routing can mitigate the impact of wireless loss link owing to its dynamical and opportunistic route selection. Network coding can improve network resource utilization. Coding opportunities lie on the co-location of multiple concurrent flows. To create more coding opportunities and improve network throughput, we propose a novel Opportunistic Routing with inter-flow Network Coding（ORNC） algorithm. In ORNC, opportunistic route selection of the each packet forwarding is in a practical network coding-aware manner, and employs backpressure policy to balance the network load when without coding opportunity. The simulation results show that ORNC can achieve a remarkable improvement in terms of the network throughput in multi-hop wireless networks.

关 键 词：无线多跳网络 机会路由 网络编码 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]