混合无线Mesh网络能量与移动性感知的路由协议研究

发布时间：2018-02-08 14:42

本文关键词： 混合无线Mesh网络路由协议能量感知移动性感知限制机制能量均衡　出处：《吉林大学》2016年硕士论文　论文类型：学位论文

【摘要】：混合无线Mesh网络(Wireless Mesh Networks,WMN)因其具有更强的网络连接性、更高的网络可靠性和更大的覆盖范围,被认为是无线宽带接入Internet的一个理想解决方案。路由协议为网络中节点通信提供有效选路依据,其好坏直接影响着网络吞吐量、丢包率等性能。因此,混合WMN路由研究对于提高网络整体性能至关重要。现有的无线Mesh网络路由研究主要集中在基础设施Mesh网络或客户端Mesh网络中,混合WMN路由研究报道相对较少。在混合WMN中,客户端具有移动性和能量受限特性,会影响路径的稳定性和网络的生存时间;客户端的多跳通信导致通信链路多样化,现有的基础设施Mesh路由协议不再适用于混合WMN。因此设计一种综合考虑网络状态及混合WMN节点特性的路由协议对未来宽带无线通信的发展具有重要理论意义和应用价值。本文针对现有的混合WMN路由协议未能综合考虑网络干扰、负载及Mesh客户端的移动性和能量受限特性问题,提出了一种能量与移动性感知(Energy and Mobility Aware,EMA)路由协议。EMA路由协议在AODV协议基础上,采用新提出的能量与移动性感知路由度量MEMA(Metric of Energy and Mobility Aware)作为选路标准。MEMA度量将通过跨层设计方法获取的MAC层信道利用率、路由层路径长度、应用层的节点移动速度和剩余能量作为度量参数,综合考虑了网络干扰、负载,并感知Mesh客户端移动性和能量受限特性对网络状态的影响,从而选择一条吞吐量高而稳定的最优路径。同时针对客户端转发特性带来的大量洪泛开销设计一种限制转发机制优化EMA路由协议,有效的降低了开销并节约能量。NS2仿真结果表明,EMA路由协议在吞吐量、丢包率、平均时延、网络开销和客户端能量消耗等网络性能方面均有明显的改善。在上述研究基础上,本文提出了一种区域能量与移动性感知(Regional Energy and Mobility Aware,REMA)路由协议,解决了现有混合WMN路由协议未考虑Mesh客户端能量受限特性对网络生存时间的影响问题,使所选路径更稳定。REMA协议主要从两方面对MEMA度量进行了改进:(1)采用平均集中度感知通信节点传输范围内的能量消耗强度及其离散程度,为网络业务选择剩余能量充足的区域,实现能量均衡并延长网络生存时间;(2)采用平均离散度重新衡量移动速度对网络的影响,增强路径的稳定性,降低了网络开销。REMA不仅更准确的感知了客户端能量受限和移动性对网络状态的影响,同时均衡网络能量消耗并延长网络生存时间。NS2仿真结果表明,REMA路由协议能够显著提高网络性能,均衡网络能量与负载,实现了延长网络生存时间的目标。本文的工作和研究成果为混合WMN能量与移动性感知路由协议研究提供了参考。
[Abstract]:Hybrid wireless Mesh networks Wireless Mesh Networks (WMNs) because of its greater network connectivity, higher network reliability and wider coverage, It is considered to be an ideal solution for wireless broadband access Internet. The routing protocol provides an effective routing basis for node communication in the network, which directly affects the network throughput, packet loss rate and other performance. The research of hybrid WMN routing is very important to improve the overall performance of the network. The existing wireless Mesh network routing research is mainly focused on the infrastructure Mesh network or client Mesh network, and the hybrid WMN routing research reports are relatively few. The mobility and energy limitation of the client will affect the stability of the path and the lifetime of the network, and the multi-hop communication of the client will lead to the diversification of communication links. The existing infrastructure Mesh routing protocol is no longer suitable for hybrid WMNs. Therefore, it is of great theoretical significance and application to design a routing protocol that takes into account the network state and the characteristics of hybrid WMN nodes for the future development of broadband wireless communication. Value. In view of the existing hybrid WMN routing protocols, the network interference is not considered synthetically. This paper proposes an energy and mobility aware energy and Mobility Aware EMA routing protocol based on the AODV protocol, which is based on the load and the mobility and energy limitation characteristics of the Mesh client. Using the new proposed energy and mobility aware routing metric (MEMA(Metric of Energy and Mobility Aware) as the routing standard, the channel utilization and routing layer path length of MAC layer will be obtained by cross-layer design. The node moving speed and residual energy of the application layer are used as the measurement parameters, considering the network interference and load, and perceiving the influence of the mobility and energy limitation of Mesh client on the network state. In order to select an optimal path with high throughput and stable throughput, a constrained forwarding mechanism is designed to optimize the EMA routing protocol for a large amount of flooding overhead caused by the client forwarding feature. The simulation results show that the performance of EMA routing protocol is significantly improved in terms of throughput, packet loss rate, average delay, network overhead and client energy consumption. In this paper, a regional Energy and Mobility hardware routing protocol is proposed, which solves the problem that the existing hybrid WMN routing protocols do not consider the influence of Mesh client energy limitation on the network lifetime. To make the selected path more stable. Rema protocol mainly improves the MEMA metric from two aspects: 1) using the average concentration to perceive the energy consumption intensity and its dispersion in the transmission range of the communication node, so as to select the region with sufficient residual energy for the network service. To achieve energy balance and prolong the network lifetime, the average dispersion is used to re-measure the impact of moving speed on the network and enhance the stability of the path. Reduced network overhead. REMA not only more accurately aware of the impact of client energy constraints and mobility on the network state, At the same time, balancing network energy consumption and prolonging network lifetime. NS2 simulation results show that the routing protocol can significantly improve network performance, balance network energy and load. The goal of prolonging the network lifetime is achieved. The work and research results in this paper provide a reference for the research of hybrid WMN energy and mobility aware routing protocols.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5

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