本文關(guān)鍵詞：大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)的分布式位置管理技術(shù)　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

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

【摘要】：大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)是泛在無(wú)線網(wǎng)中最常見的網(wǎng)絡(luò)形式之一。這種網(wǎng)絡(luò)是一種自組織網(wǎng)絡(luò),沒有固定的通信網(wǎng)絡(luò)基礎(chǔ)設(shè)施;節(jié)點(diǎn)數(shù)量成千上萬(wàn),并且移動(dòng)頻繁,導(dǎo)致網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)頻繁變化。節(jié)點(diǎn)數(shù)目增加時(shí),網(wǎng)絡(luò)的信令開銷會(huì)迅速增大,分組的成功遞交率也會(huì)極大降低,這直接影響了網(wǎng)絡(luò)的可擴(kuò)展性。當(dāng)用戶節(jié)點(diǎn)在大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)內(nèi)部移動(dòng)或者跨網(wǎng)絡(luò)移動(dòng)時(shí),我們需要跟蹤節(jié)點(diǎn)的實(shí)時(shí)位置,以便于與該節(jié)點(diǎn)通信時(shí)能快速、準(zhǔn)確地找到此節(jié)點(diǎn)。通過(guò)引入位置管理技術(shù)可以較好地解決上述問(wèn)題:在大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)中,借助于網(wǎng)絡(luò)的邏輯分區(qū)、物理分層以及合理的位置管理數(shù)據(jù)庫(kù),引入恰當(dāng)?shù)奈恢霉芾聿呗?可以提高移動(dòng)管理性能、有效的減少由于網(wǎng)絡(luò)擴(kuò)展引起的網(wǎng)絡(luò)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(shù)的優(yōu)點(diǎn)以及尚存在的問(wèn)題之后,結(jié)合大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)的應(yīng)用需求,設(shè)計(jì)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(dāng)網(wǎng)絡(luò)規(guī)模很大時(shí),采用平面結(jié)構(gòu)的性能會(huì)很差,因此把大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)分為兩個(gè)層次,并且提出了兩級(jí)集中分布式位置管理服務(wù)器架構(gòu),用于管理節(jié)點(diǎn)位置信息;然后,設(shè)計(jì)了基于鏈路狀態(tài)的拓?fù)湫纬珊途S護(hù)過(guò)程,實(shí)現(xiàn)區(qū)域內(nèi)和區(qū)域間節(jié)點(diǎn)信息交互,以及各位置服務(wù)器數(shù)據(jù)的收集;最后,設(shè)計(jì)了位置更新和查詢的詳細(xì)流程,使得節(jié)點(diǎn)在移動(dòng)時(shí)能實(shí)時(shí)地更新其位置,并且能快速、準(zhǔn)確地查詢到目的節(jié)點(diǎn)所處的區(qū)域,找到通往目的節(jié)點(diǎn)的最短路徑。最后,本文利用OPNET網(wǎng)絡(luò)仿真軟件搭建了仿真平臺(tái),從組網(wǎng)和拓?fù)渚S護(hù)方案、位置登記和更新方案以及位置查詢方案這三個(gè)方面對(duì)基于地理位置的區(qū)域柵格位置管理方案進(jìn)行了功能驗(yàn)證和性能測(cè)試,并且與現(xiàn)有位置管理方案的性能進(jìn)行了對(duì)比,結(jié)果表明本文設(shè)計(jì)的方案更加適用于大規(guī)模動(dòng)態(tài)網(wǎng)絡(luò)。
[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(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN915.0

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本文編號(hào)：1382085