无线Mesh网络吞吐量优化研究
发布时间：2018-12-12 02:18
【摘要】：无线Mesh网络(WMNs,Wireless Mesh Networks,又称无线网状网、无线网格网等)具有更低的部署成本,较大的网络覆盖范围,较高的网络容错能力,以及动态的自组网和自配置功能。因此,无线Mesh网络接入技术已经逐渐成为一个可以提供低成本互联网接入的灵活、高效、可靠的无线广域覆盖多跳通信解决方案,是一种新型的有广阔应用前景的无线组网技术。 随着互联网和无线多媒体技术的飞速发展,人们对于无线网络提供的服务质量(QoS)要求也越来越高,特别是作为无线数据业务入口的无线Mesh网络。无线网络服务质量无法保证的一个主要原因是当前网络资源不足,导致网络业务流时常发生拥塞,而传统的增大信号强度、冗余编码和变换路由等方式在提高信道容量的同时,反而会减少网络可用资源,加重网络拥塞甚至造成整个网络瘫痪,无法从根本上解决网络拥塞问题。因此,无线Mesl节点之间如何合理地管理和分配网络资源以提高网络吞吐量成为亟待解决的问题,本文的主要贡献有： 1.为了提高无线Mesh网络信道容量,对现有的无线Mesh路由器配置多个射频收发器和多条信道,相邻的无线Mesh节点通过工作在不同信道上,使用多个射频收发器同时通信。在此网络模型的基础上,我们提出了一种基于非合作博弈理论的多射频多信道联合分配策略,无线Mesh节点根据自身流量负载,动态地调整射频接口与信道分配,从而实现数据流之间的无干扰传输。 2.进一步采用跨层协作技术优化管理和分配多射频多信道无线Mesh网络资源,以提高网络传输速率。通过跨层协作设计,对无线Mesh节点的物理层、数据链路层和传输控制层上的发射功率、信道分配和传输速率进行联合优化,从而提高无线Mesh网络吞吐量。 3.最后,考虑无线Mesh网络的多径路由特性,提出一种基于博弈理论的跨层拥塞控制方案。该方案通过协议栈中网络层和传输控制层的信息交互,使得节点在网络层进行路由选择的同时,传输层能够根据网络层链路拥塞状态调整拥塞窗口大小,从而有效减少传输时延,改善无线Mesh网络吞吐量。
[Abstract]:Wireless Mesh networks (WMNs,Wireless Mesh Networks, wireless grid networks, etc.) have lower deployment costs, larger network coverage, higher network fault tolerance, and dynamic ad hoc network and self-configuration functions. Therefore, wireless Mesh network access technology has gradually become a flexible, efficient and reliable wireless wide-area coverage multi-hop communication solution that can provide low-cost Internet access. Is a new type of wireless networking technology with broad application prospects. With the rapid development of Internet and wireless multimedia technology, the quality of service (QoS) requirements of wireless network are becoming more and more high, especially the wireless Mesh network, which is the entry of wireless data services. One of the main reasons why the quality of service in wireless networks cannot be guaranteed is that the current network resources are insufficient, which leads to the congestion of network traffic. However, the traditional methods such as increasing signal strength, redundant coding and changing routing can improve the channel capacity at the same time. On the contrary, it will reduce the available resources of the network, aggravate the network congestion and even cause the whole network paralysis, which can not fundamentally solve the network congestion problem. Therefore, how to reasonably manage and allocate network resources between wireless Mesl nodes to improve network throughput becomes an urgent problem. The main contributions of this paper are as follows: 1. In order to improve the channel capacity of wireless Mesh networks, multiple radio frequency transceivers and multiple channels are configured for existing wireless Mesh routers. Adjacent wireless Mesh nodes work on different channels and use multiple radio frequency transceivers to communicate simultaneously. On the basis of this network model, we propose a multi-radio frequency and multi-channel joint allocation strategy based on non-cooperative game theory. Wireless Mesh nodes dynamically adjust RF interface and channel allocation according to their traffic load. In order to achieve non-interference transmission between data streams. 2. Furthermore, cross-layer collaboration technology is used to optimize the management and allocation of multi-radio frequency and multi-channel wireless Mesh network resources to improve the network transmission rate. Through cross-layer collaborative design, the transmission power, channel allocation and transmission rate on the physical layer, data link layer and transmission control layer of wireless Mesh nodes are jointly optimized to improve the throughput of wireless Mesh networks. 3. Finally, considering the multipath routing characteristics of wireless Mesh networks, a cross-layer congestion control scheme based on game theory is proposed. Through the information interaction between the network layer and the transmission control layer in the protocol stack, the network layer can adjust the congestion window size according to the congestion state of the network layer while the nodes are routing in the network layer. In order to reduce the transmission delay effectively, improve the throughput of wireless Mesh network.
【学位授予单位】：福建师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2373710
[Abstract]:Wireless Mesh networks (WMNs,Wireless Mesh Networks, wireless grid networks, etc.) have lower deployment costs, larger network coverage, higher network fault tolerance, and dynamic ad hoc network and self-configuration functions. Therefore, wireless Mesh network access technology has gradually become a flexible, efficient and reliable wireless wide-area coverage multi-hop communication solution that can provide low-cost Internet access. Is a new type of wireless networking technology with broad application prospects. With the rapid development of Internet and wireless multimedia technology, the quality of service (QoS) requirements of wireless network are becoming more and more high, especially the wireless Mesh network, which is the entry of wireless data services. One of the main reasons why the quality of service in wireless networks cannot be guaranteed is that the current network resources are insufficient, which leads to the congestion of network traffic. However, the traditional methods such as increasing signal strength, redundant coding and changing routing can improve the channel capacity at the same time. On the contrary, it will reduce the available resources of the network, aggravate the network congestion and even cause the whole network paralysis, which can not fundamentally solve the network congestion problem. Therefore, how to reasonably manage and allocate network resources between wireless Mesl nodes to improve network throughput becomes an urgent problem. The main contributions of this paper are as follows: 1. In order to improve the channel capacity of wireless Mesh networks, multiple radio frequency transceivers and multiple channels are configured for existing wireless Mesh routers. Adjacent wireless Mesh nodes work on different channels and use multiple radio frequency transceivers to communicate simultaneously. On the basis of this network model, we propose a multi-radio frequency and multi-channel joint allocation strategy based on non-cooperative game theory. Wireless Mesh nodes dynamically adjust RF interface and channel allocation according to their traffic load. In order to achieve non-interference transmission between data streams. 2. Furthermore, cross-layer collaboration technology is used to optimize the management and allocation of multi-radio frequency and multi-channel wireless Mesh network resources to improve the network transmission rate. Through cross-layer collaborative design, the transmission power, channel allocation and transmission rate on the physical layer, data link layer and transmission control layer of wireless Mesh nodes are jointly optimized to improve the throughput of wireless Mesh networks. 3. Finally, considering the multipath routing characteristics of wireless Mesh networks, a cross-layer congestion control scheme based on game theory is proposed. Through the information interaction between the network layer and the transmission control layer in the protocol stack, the network layer can adjust the congestion window size according to the congestion state of the network layer while the nodes are routing in the network layer. In order to reduce the transmission delay effectively, improve the throughput of wireless Mesh network.
【学位授予单位】：福建师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
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