大规模动态网络的分布式位置管理技术

发布时间：2018-01-05 07:11

本文关键词：大规模动态网络的分布式位置管理技术　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：大规模动态网络是泛在无线网中最常见的网络形式之一。这种网络是一种自组织网络,没有固定的通信网络基础设施;节点数量成千上万,并且移动频繁,导致网络拓扑结构频繁变化。节点数目增加时,网络的信令开销会迅速增大,分组的成功递交率也会极大降低,这直接影响了网络的可扩展性。当用户节点在大规模动态网络内部移动或者跨网络移动时,我们需要跟踪节点的实时位置,以便于与该节点通信时能快速、准确地找到此节点。通过引入位置管理技术可以较好地解决上述问题:在大规模动态网络中,借助于网络的逻辑分区、物理分层以及合理的位置管理数据库,引入恰当的位置管理策略,可以提高移动管理性能、有效的减少由于网络扩展引起的网络管理开销、提高通信成功率。本文在分析了现有位置管理技术的优点以及尚存在的问题之后,结合大规模动态网络的应用需求,设计了基于地理位置的区域栅格位置管理方案:首先,分析得知当网络规模很大时,采用平面结构的性能会很差,因此把大规模动态网络分为两个层次,并且提出了两级集中分布式位置管理服务器架构,用于管理节点位置信息;然后,设计了基于链路状态的拓扑形成和维护过程,实现区域内和区域间节点信息交互,以及各位置服务器数据的收集;最后,设计了位置更新和查询的详细流程,使得节点在移动时能实时地更新其位置,并且能快速、准确地查询到目的节点所处的区域,找到通往目的节点的最短路径。最后,本文利用OPNET网络仿真软件搭建了仿真平台,从组网和拓扑维护方案、位置登记和更新方案以及位置查询方案这三个方面对基于地理位置的区域栅格位置管理方案进行了功能验证和性能测试,并且与现有位置管理方案的性能进行了对比,结果表明本文设计的方案更加适用于大规模动态网络。
[Abstract]:Large scale dynamic network is one of the most common form of pan in a wireless network. This network is a self-organizing network, a communication network with no fixed infrastructure; the number of nodes and frequent movement, resulting in tens of thousands of, the network topology changes frequently. The number of nodes increases, the signaling overhead of the network increases rapidly, the success of the group delivery rate will be greatly reduced, which directly affects the network scalability. When moving across the network in large scale dynamic network or mobile user node, we need real-time location tracking of nodes, in order to facilitate communication with the node can quickly and accurately find the node. By introducing the location management technology can be better to solve the above problems: in a large dynamic network, a logical partition with the network, as well as the reasonable physical hierarchical location management database, introducing appropriate location Management strategies can improve the performance of mobile management, effectively reduce the network overhead caused due to extension of network management, improve the success rate of communication. Based on the analysis of the advantages of the existing location management techniques and problems, combined with the application requirements of large-scale and dynamic network design, regional grid location management scheme based on geographical location: first analysis shows that, when the network size is large, the performance of planar structure will be very poor, so the large scale dynamic network is divided into two levels, and put forward the two centralized distributed location management server architecture for managing node location information; and then, the design of link state topology formation and maintenance process based on the realization of regional intra - and inter regional node information exchange, and collect the data of each server location; finally, design the detailed process of location update and query, the Nodes can real-time update its position in the mobile, and can quickly and accurately query to the destination node located area, find the shortest path to the destination node. Finally, this paper uses OPNET network simulation software to build a simulation platform, and from the network topology maintenance scheme, location registration and update scheme and location query scheme these three aspects of the functional verification and performance test of regional grid location management scheme based on geographical position and performance with the existing location management schemes are compared. The results show that the design scheme is more suitable for large-scale dynamic networks.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.0

【共引文献】