【摘要】：群智感知作為一種新的感知模式,是指攜帶智能設備的移動人群通過無線通信來解決大規(guī)模的移動感知任務。近年來,為達到高效節(jié)能的數(shù)據(jù)傳輸目的,面向群智感知的機會網(wǎng)絡數(shù)據(jù)傳輸算法得到了廣泛的關注。已有的數(shù)據(jù)傳輸方案大都依賴于歷史通信記錄或者用戶的行動軌跡來完成數(shù)據(jù)傳輸,然而這些信息的獲取相對復雜,并且節(jié)點的歷史通信記錄或者行動軌跡都是動態(tài)變化,隨著通信規(guī)模的不斷擴大,對應數(shù)據(jù)的計算量十分龐大,這就導致了要在節(jié)點之間建立穩(wěn)定的通信鏈路非常困難�，F(xiàn)有的數(shù)據(jù)傳輸算法,在傳輸成功率以及傳輸開銷率上仍存在諸多不足,論文設計了一種面向群智感知的數(shù)據(jù)傳輸方案,能夠較大的改善機會網(wǎng)絡中數(shù)據(jù)傳輸?shù)某晒β?有效降低數(shù)據(jù)傳輸過程中的網(wǎng)絡開銷。論文首先提出了一種基于阿基米德曲線的數(shù)據(jù)傳輸方案,以面向災后救援應急通信為應用場景,為達到高效節(jié)能和數(shù)據(jù)穩(wěn)定傳輸目的,將阿基米德曲線引入到面向群智感知的機會網(wǎng)絡數(shù)據(jù)傳輸方案設計中。該方法根據(jù)阿基米德曲線均勻分布且不相互干擾的特性,并在以應急救援通信場景中心為起點的阿基米德曲線上設置適量的靜態(tài)節(jié)點以來輔助數(shù)據(jù)的傳輸;同時從救災現(xiàn)場攜帶智能設備的車輛與人群中選取高緩存、高通信范圍、高移動率等高效用值個體節(jié)點成立中心組與靜態(tài)節(jié)點進行數(shù)據(jù)傳輸。該方案采用了內(nèi)外結(jié)合的方式,同時利用了輔助布置的靜態(tài)節(jié)點和網(wǎng)絡已有的高效節(jié)點進行數(shù)據(jù)傳輸,在保證穩(wěn)定的傳輸成功率的同時達到了降低開銷的目的。在此基礎上,為進一步提高數(shù)據(jù)傳遞成功率,我們設計了一種根據(jù)節(jié)點狀態(tài)賦予節(jié)點不同的傳輸概率計算方法的數(shù)據(jù)傳輸方案,對于靜態(tài)節(jié)點和動態(tài)節(jié)點給予不同的傳輸成功率刷新方法,從而達到有效提高數(shù)據(jù)傳輸成功率的目的,從而為群智感知網(wǎng)絡高效的數(shù)據(jù)傳輸提供有力保障。最后,為了方便算法的驗證與分析,本文設計了一種面向災后應急通信的可視化模擬系統(tǒng)。
[Abstract]:Group perception, as a new mode of perception, refers to the mobile crowd carrying intelligent devices to solve large-scale mobile sensing tasks through wireless communication. In recent years, in order to achieve the purpose of efficient and energy-saving data transmission, the opportunity network data transmission algorithm for group perception has been paid more and more attention. Most of the existing data transmission schemes rely on the historical communication records or the user's action track to complete the data transmission. However, the acquisition of this information is relatively complex, and the historical communication records or action tracks of the nodes are dynamic changes. With the increasing of communication scale, the computation of corresponding data is very large, which makes it very difficult to establish stable communication links between nodes. The existing data transmission algorithms still have many shortcomings in transmission success rate and transmission expense rate. This paper designs a data transmission scheme oriented to group intelligence, which can greatly improve the success rate of data transmission in opportunistic networks. Effectively reduce the network overhead in the process of data transmission. Firstly, this paper proposes a data transmission scheme based on Archimedes curve, which takes emergency communication for post-disaster rescue as an application scenario, in order to achieve the purpose of efficient energy saving and stable data transmission. Archimedes curve is introduced into the group perception oriented opportunistic network data transmission scheme design. According to the characteristic of uniform distribution of Archimedes curve and no interference between each other, this method sets appropriate static nodes on Archimedes curve starting from the center of emergency rescue communication scene to transmit auxiliary data. At the same time, high cache, high communication range and high mobility rate are selected from vehicles and people carrying intelligent devices in disaster relief site to set up central group and static nodes for data transmission. In this scheme, the combination of internal and external is adopted, and the static nodes of auxiliary arrangement and the efficient nodes of network are used to transmit data. The scheme not only guarantees the stable success rate of transmission, but also reduces the overhead. On this basis, in order to further improve the success rate of data transfer, we design a data transmission scheme which gives nodes different transmission probability calculation methods according to the node state. For the static node and the dynamic node, different refresh methods are given to improve the success rate of data transmission, thus providing a powerful guarantee for the efficient data transmission of the group perception network. Finally, in order to facilitate the verification and analysis of the algorithm, a visual simulation system for post-disaster emergency communication is designed in this paper.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN92

【參考文獻】

相關期刊論文 前2條

1 徐佳;王汝傳;徐杰;廖俊;;容遲網(wǎng)絡多副本路由技術研究[J];計算機科學;2011年08期

2 王貴竹;張家勇;王炳庭;;SA-DTN:基于節(jié)點社會活躍度的DTN路由研究[J];計算機應用研究;2011年04期

，

本文編號：2437204