本文關鍵詞：大規(guī)模動態(tài)網(wǎng)絡的分布式位置管理技術　出處：《電子科技大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 大規(guī)模動態(tài)網(wǎng)絡 區(qū)域柵格分層 位置管理 OPNET

【摘要】：大規(guī)模動態(tài)網(wǎng)絡是泛在無線網(wǎng)中最常見的網(wǎng)絡形式之一。這種網(wǎng)絡是一種自組織網(wǎng)絡,沒有固定的通信網(wǎng)絡基礎設施;節(jié)點數(shù)量成千上萬,并且移動頻繁,導致網(wǎng)絡拓撲結構頻繁變化。節(jié)點數(shù)目增加時,網(wǎng)絡的信令開銷會迅速增大,分組的成功遞交率也會極大降低,這直接影響了網(wǎng)絡的可擴展性。當用戶節(jié)點在大規(guī)模動態(tài)網(wǎng)絡內部移動或者跨網(wǎng)絡移動時,我們需要跟蹤節(jié)點的實時位置,以便于與該節(jié)點通信時能快速、準確地找到此節(jié)點。通過引入位置管理技術可以較好地解決上述問題:在大規(guī)模動態(tài)網(wǎng)絡中,借助于網(wǎng)絡的邏輯分區(qū)、物理分層以及合理的位置管理數(shù)據(jù)庫,引入恰當?shù)奈恢霉芾聿呗?可以提高移動管理性能、有效的減少由于網(wǎng)絡擴展引起的網(wǎng)絡管理開銷、提高通信成功率。本文在分析了現(xiàn)有位置管理技術的優(yōu)點以及尚存在的問題之后,結合大規(guī)模動態(tài)網(wǎng)絡的應用需求,設計了基于地理位置的區(qū)域柵格位置管理方案:首先,分析得知當網(wǎng)絡規(guī)模很大時,采用平面結構的性能會很差,因此把大規(guī)模動態(tài)網(wǎng)絡分為兩個層次,并且提出了兩級集中分布式位置管理服務器架構,用于管理節(jié)點位置信息;然后,設計了基于鏈路狀態(tài)的拓撲形成和維護過程,實現(xiàn)區(qū)域內和區(qū)域間節(jié)點信息交互,以及各位置服務器數(shù)據(jù)的收集;最后,設計了位置更新和查詢的詳細流程,使得節(jié)點在移動時能實時地更新其位置,并且能快速、準確地查詢到目的節(jié)點所處的區(qū)域,找到通往目的節(jié)點的最短路徑。最后,本文利用OPNET網(wǎng)絡仿真軟件搭建了仿真平臺,從組網(wǎng)和拓撲維護方案、位置登記和更新方案以及位置查詢方案這三個方面對基于地理位置的區(qū)域柵格位置管理方案進行了功能驗證和性能測試,并且與現(xiàn)有位置管理方案的性能進行了對比,結果表明本文設計的方案更加適用于大規(guī)模動態(tài)網(wǎng)絡。
[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.

【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN915.0

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本文編號：1382085