【作者】 冯小龙；

【导师】 钱建生；

【作者基本信息】 中国矿业大学 ， 通信与信息系统， 2011， 博士

【摘要】 新兴的无线Mesh网络具有大容量、高速率、广覆盖和移动自组的特色,应用到煤矿井下构成矿井无线Mesh网络作宽带移动通信系统可以有效地解决矿井现有通信系统无法解决的诸多难题,有着现实且重要的意义。设计符合矿井特征的无线Mesh网络结构及相关协议以满足矿井宽带业务的需求是本文的主要研究内容。围绕着研究内容,本文做了以下几个方面的研究工作。1.分析并归纳了矿井无线Mesh网络的拓扑结构及特征,并针对矿井无线Mesh骨干网络长距离链状多跳的典型特征使用多模多信道技术设计了一种3模多信道网络结构。3模结构使Mesh路由节点能够并发地处理数据本地接入、数据转接和数据转发任务;多信道分配使链状骨干链路在连续K跳内工作于K个不相干扰的正交信道而能并发地进行数据传输。仿真和实际井下试验(第五章)表明,这种3模多信道的矿井无线Mesh网络骨干链路在多跳后仍保持了较高的吞吐量,能够支持视频信号的宽带业务传输。2.理论分析了矿井无线Mesh网络骨干链路容量性能。链路容量是链状多跳网络吞吐量的基础,取决于链路使用的信道的传输速率,在一定的信道带宽条件下,与有用信号与干扰信号的比值SINR有关。结合矿井巷道特殊的电磁波传输衰减规律,给出了矿井无线Mesh网络多信道链状骨干链路的信噪比SINR的物理模型,并与地面环境中链状多跳网络进行了比较,为矿井无线Mesh网络的设计和规划部署提供了一定的理论指导。3.提出了一种矿井无线Mesh环网路由判据。在环形链状拓扑结构的矿井无线Mesh网络中,节点选择的到达有线网关的路径的吞吐量取决于该路径中瓶颈链路的吞吐量。在Microsoft提出的路由判据WCETT的基础上,提出了一种能够充分考虑流内干扰的路由判据ICETT。与WCETT路由判据相比,ICETT能更准确的判断路径的瓶颈链路,为节点选择更高吞吐量的路径提供了依据。4.设计了一种矿井无线Mesh网络联合信道分配的路由协议MIMC-AODV。通过借鉴无线自组网络按需路由协议AODV的思想,在路由发起阶段使用AODV机理寻找最小跳数路由,在路由确认阶段联合信道分配策略,利用信道的多样性循环分配给该最小跳数路由中的链路不同的正交信道,既保证了源节点与目标节点之间的路径最短,又因最大的降低路径的流内干扰而保证了路径的吞吐量。在某些特殊场合如矿难事故发生后的抢险救援中使用可以获得更优性能的数据传输路径。5.结合具体的“矿井无极绳绞车运输视频监控”项目对矿井无线Mesh网络的应用进行了研究。给出了系统方案和结构设计,并在煤矿井下现场进行了实际测试。测试结果表明,该系统在矿井巷道环境中多跳后仍然能够支持视频信号的传输,解决了煤矿安全生产中的一个实际难题。该论文有图72幅,表11个,参考文献130篇。更多还原

【Abstract】 Emerging wireless mesh network has the characteristics of large capacity, high speed, wide coverage, mobility and self-organization. Many problems which can’t be solved by the existing mine communication systems will be solved with the application of WMN in coal mine. Designing the structure and the relevant protocols of mine wireless mesh network in order to meet the demand for broadband services are contents of this article. Around the research, this paper made the following aspects of the research.1. Studied and summarized the mine wireless mesh network topology and characteristics, and designed a 3-radio multi-channel network structure by using multi-radio multi-channel technology for the multi-hop long chain backbone network. 3-radio structure allows nodes to concurrently process the local data accessing, data ingressing and data egressing ; Multi-channel distribution allows the chain backbone link to work in K orthogonal channeles in a continuous K hops with no interference to transfer data concurrently. Simulation and actual underground testing (chapter V) show that the 3-radio multi-channel wireless mesh backbone network still maintain high throughput after mulit-hop and can support broadband video transmission.2. Analyzed the backbone link capacity of mine wireless mesh network in theory. Link capacity is the basis of the throughput of multi-hop chain network, depends on the transmission rate of the channel link used. In a certain channel bandwidth conditions, it is related to the value of SINR. The physical model of SINR in underground mine wireless mesh network is derived in this paper and is compared to which on ground. The conclusions is useful for the designing and planning of mine wireless mesh network.3. Proposed a routing metric for mine wireless mesh ring network. In the ring topology of mine wireless mesh network, throughput of path selected to reach wired gateway depends on the path bottleneck link throughput. Based on the routing metric WCETT which proposed by Microsoft, a routing metric of ICETT is proposed in this paper. Compared with the WCETT routing metric, ICETT can more accurately determine bottleneck link of path, so it can select a higher throughput path.4. Designed a mine wireless mesh network routing protocol MIMC-AODV , which is combined with channel assignmeng. During the period of route finding, a strategy same as AODV which is an on-demand routing protocol of Ad Hoc networks is used to find the shortest path. During the period of route replying, interfaces of nodes in found path will be assigned with appropriate channels one by one while these nodes receiving Route Reply in turn. So the channel resources are full used as much as possible to avoid link interferencen. In some special occasions, such as mine rescue after the accident, path with better performance can be select with the using of MIMC-AODV.5. Combined with specific project of "monitoring system of mine endless rope winch transport " , the application of mine wireless mesh network is studied. The program and designing of the system is detailed in this paper. Testing in coal mine show that the system in the mine roadway environment can support video signals transmitting with multiple hops, so a practical problem in coal mine production safety is solved.更多还原