基于网络编码和机会转发的无线Mesh网关键技术研究

项目名称： 基于网络编码和机会转发的无线Mesh网关键技术研究

项目编号： No.61300200

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 自动化技术、计算机技术

项目作者： 张三峰

作者单位： 东南大学

项目金额： 22万元

中文摘要： 低成本、易于部署的无线Mesh网在网络接入、社区组网等方面具有显著优势，近年来成为研究热点。本项目研究应用网络编码和机会转发技术优化无线Mesh网传输效率、保证公平性的关键技术。在介质访问控制层，建立描述无线信道单播/广播分组到达和服务过程的随机过程模型，设计优化接入效率、保证资源分配公平性的信道接入控制算法；在网络层，建立成本-效用优化问题模型，求解最优的候选转发节点集合和转发任务分配方案，设计能够反应上下游节点编码状态和链路质量时变特性的最优路径构建算法，降低传输成本，提高其实用性；在传输层，建立描述链路丢包、编码纠错、传输控制窗口、发送速率间交互机制的随机过程模型，设计拥塞检测和速率控制机制，提出兼顾公平性约束的网络效用最大化资源分配模型；同时，设计跨层交互机制和联合优化的方法，提高整体传输性能。本项目的研究内容及成果具有一定的创新性，并可望推动无线Mesh网技术的实用进程。

中文关键词： 无线Mesh网络；网络编码；机会转发；信道接入控制；速率控制

英文摘要： Wireless Mesh Networks have significant advantages in Internet access and community networking area for their low-cost, easy to deploy characters and they become a research hotspot in recent years. To optimize performance and ensure fairness, this project carries researches on key technologies of wireless mesh networks based on Network Coding and Opportunistic Routing methods. On the MAC layer, propose a stochastic process model to describe unicast/broadcast packet arrival and service process for the wireless channel, propose algorithms optimizing media access performance and ensuring fairness of media resource sharing. On the network layer, propose a routing cost and transport utility optimization model, seek optimal candidate forwarding set and forwarding task allocation scheme, propose a optimal path building algorithm awaring coding state of neighborhood and link quality to reduce transmitting cost and promote its practicability. On the transmission layer, propose a stochastic process model to explore the interactive mechanism among link error, error correction, transport control window and sending rate, design mechanisms for congestion detection and rate control, propose a network utility maximization model of resource allocation , and consider the fairness constraints. At the same time, design cross-layer

英文关键词： Wireless Mesh Network；Network Coding；Opportunistic Forwarding；Media Access Control；Rate Control