無線Ad-Hoc網絡平面移動模型及網絡容量分析
發(fā)布時間：2019-02-15 13:37
【摘要】：隨著大規(guī)模無線通信系統(tǒng)的廣泛應用,用戶以及接入點的空間位置往往并非完全規(guī)則部署。由于無線Ad-Hoc網絡具有良好的自組織性,動態(tài)拓撲性及無中心性使其有迅速組網,快速部署等優(yōu)點,成為國內外研究者的研究熱點。無線Ad-Hoc網絡中接收機接收信號的強度以及所承受的干擾強度都直接依賴于網絡中節(jié)點的空間位置,無線Ad-Hoc網絡的節(jié)點空間拓撲結構及其變動成為影響網絡性能的關鍵。因此本文著重研究無線Ad-Hoc網絡平面移動模型及時延,并分析了無線Ad-Hoc網絡在通信過程中的干擾,最終通過網絡容量來評價模型及網絡的性能。在建立平面移動模型時,無線Ad-Hoc網絡基于全雙工雙向通信系統(tǒng)(BFD)并采用IEEE802.11 DCF(RTS/CTS模式)標準。本文將無線Ad-Hoc網絡分解為若干鏈路即網絡中每兩個節(jié)點組成一組節(jié)點對,節(jié)點對間的傳輸采用雙向的多輸入多輸出技術(Two-Way MIMO)。本文通過節(jié)點間的距離定義通信狀態(tài),以連續(xù)兩次運動的角度差判斷運動方向,計算出不同通信狀態(tài)的概率分布函數從而確立了無線Ad-Hoc網絡的平面移動模型。在分析移動模型時延時,本文運用了二維Markov模型及排隊理論,其中二維Markov模型中每個狀態(tài)由嘗試傳輸次數與競爭窗口大小兩個指標構成,在進行信道競爭時采用M/G/1排隊理論。最終得到了移動模型的平均時延并對其進行了模擬分析。而在干擾評估中,提出兩種干擾評估方法,即節(jié)點干擾評估法和鏈路干擾評估法。其中節(jié)點干擾評估以節(jié)點對中的接收節(jié)點為研究對象,并以其為中心建立干擾評估范圍,在干擾評估范圍中搜索可能對其產生干擾的發(fā)送節(jié)點。在鏈路干擾評估中對網絡中節(jié)點分為不同集合:發(fā)送節(jié)點集、接收節(jié)點集、重傳發(fā)送節(jié)點集、重傳接收節(jié)點集,分析發(fā)送端與接收端的鏈路進行干擾評估。本文推導出無線Ad-Hoc網絡中干擾的概率分布函數并計算了SIR值。本文建立的無線Ad-Hoc網絡平面移動模型及干擾分布函數最終通過網絡容量進行綜合分析,因為無線Ad-Hoc網絡的傳輸容量是保證網絡服務質量的關鍵性質之一。本文以中斷概率、數據包到達率和網絡時延作為主要指標推導出了基于全雙工(BFD)雙向移動Ad-Hoc網絡的傳輸容量表達式。通過數值模擬驗證無線Ad-Hoc網絡平面移動模型及干擾分析的有效性及普遍性。
[Abstract]:With the wide application of large-scale wireless communication systems, the spatial location of users and access points is often not fully regular deployment. Because of its good self-organization, dynamic topology and non-centrality, wireless Ad-Hoc network has the advantages of rapid networking and rapid deployment, so it has become a research hotspot at home and abroad. The intensity of receiver received signals and the intensity of interference in wireless Ad-Hoc networks are directly dependent on the spatial location of nodes in the network. The spatial topology of nodes in wireless Ad-Hoc networks and their changes are the key factors affecting the performance of the networks. Therefore, this paper focuses on the planar mobile model and delay of wireless Ad-Hoc network, analyzes the interference of wireless Ad-Hoc network in the communication process, and finally evaluates the performance of the model and network through network capacity. When building the planar mobile model, the wireless Ad-Hoc network is based on the full duplex two-way communication system (BFD) and adopts the IEEE802.11 DCF (RTS/CTS mode) standard. In this paper, the wireless Ad-Hoc network is decomposed into several links, that is, each two nodes in the network form a set of node pairs. The transmission between node pairs is based on bi-directional multiple-input and multiple-output (Two-Way MIMO).) technology. In this paper, the communication state is defined by the distance between nodes, the direction of motion is judged by the angle difference of two successive motions, the probability distribution function of different communication states is calculated, and the planar moving model of wireless Ad-Hoc network is established. In analyzing the delay of the mobile model, this paper applies the two-dimensional Markov model and queuing theory, in which each state in the two-dimensional Markov model is composed of two indexes: the number of attempts to transmit and the size of the competing window. M/G/1 queuing theory is used in channel competition. Finally, the average delay of the mobile model is obtained and simulated. In the process of interference evaluation, two methods are proposed, namely, node interference evaluation and link interference evaluation. The node interference evaluation takes the receiving node in the node pair as the research object, and establishes the interference evaluation range with it as the center, and searches for the sending node that may interfere with it in the interference evaluation range. In the link interference evaluation, the nodes in the network are divided into different sets: sending node set, receiving node set, retransmitting transmitting node set, retransmitting receiving node set, and analyzing the link interference evaluation between the sender and receiver. In this paper, the probability distribution function of interference in wireless Ad-Hoc network is derived and the SIR value is calculated. The planar mobile model and interference distribution function of wireless Ad-Hoc network established in this paper are analyzed synthetically by network capacity, because the transmission capacity of wireless Ad-Hoc network is one of the key properties to guarantee the quality of service of the network. Based on the outage probability, packet arrival rate and network delay, this paper derives the expression of transmission capacity based on full-duplex (BFD) bidirectional mobile Ad-Hoc network. The effectiveness and universality of planar mobility model and interference analysis of wireless Ad-Hoc network are verified by numerical simulation.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5
本文編號：2423412
[Abstract]:With the wide application of large-scale wireless communication systems, the spatial location of users and access points is often not fully regular deployment. Because of its good self-organization, dynamic topology and non-centrality, wireless Ad-Hoc network has the advantages of rapid networking and rapid deployment, so it has become a research hotspot at home and abroad. The intensity of receiver received signals and the intensity of interference in wireless Ad-Hoc networks are directly dependent on the spatial location of nodes in the network. The spatial topology of nodes in wireless Ad-Hoc networks and their changes are the key factors affecting the performance of the networks. Therefore, this paper focuses on the planar mobile model and delay of wireless Ad-Hoc network, analyzes the interference of wireless Ad-Hoc network in the communication process, and finally evaluates the performance of the model and network through network capacity. When building the planar mobile model, the wireless Ad-Hoc network is based on the full duplex two-way communication system (BFD) and adopts the IEEE802.11 DCF (RTS/CTS mode) standard. In this paper, the wireless Ad-Hoc network is decomposed into several links, that is, each two nodes in the network form a set of node pairs. The transmission between node pairs is based on bi-directional multiple-input and multiple-output (Two-Way MIMO).) technology. In this paper, the communication state is defined by the distance between nodes, the direction of motion is judged by the angle difference of two successive motions, the probability distribution function of different communication states is calculated, and the planar moving model of wireless Ad-Hoc network is established. In analyzing the delay of the mobile model, this paper applies the two-dimensional Markov model and queuing theory, in which each state in the two-dimensional Markov model is composed of two indexes: the number of attempts to transmit and the size of the competing window. M/G/1 queuing theory is used in channel competition. Finally, the average delay of the mobile model is obtained and simulated. In the process of interference evaluation, two methods are proposed, namely, node interference evaluation and link interference evaluation. The node interference evaluation takes the receiving node in the node pair as the research object, and establishes the interference evaluation range with it as the center, and searches for the sending node that may interfere with it in the interference evaluation range. In the link interference evaluation, the nodes in the network are divided into different sets: sending node set, receiving node set, retransmitting transmitting node set, retransmitting receiving node set, and analyzing the link interference evaluation between the sender and receiver. In this paper, the probability distribution function of interference in wireless Ad-Hoc network is derived and the SIR value is calculated. The planar mobile model and interference distribution function of wireless Ad-Hoc network established in this paper are analyzed synthetically by network capacity, because the transmission capacity of wireless Ad-Hoc network is one of the key properties to guarantee the quality of service of the network. Based on the outage probability, packet arrival rate and network delay, this paper derives the expression of transmission capacity based on full-duplex (BFD) bidirectional mobile Ad-Hoc network. The effectiveness and universality of planar mobility model and interference analysis of wireless Ad-Hoc network are verified by numerical simulation.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5
【參考文獻】
相關期刊論文 前4條
1 黎鎖平;路麗君;高彥;常杰;;無線局域網兩種多點傳輸協議的排隊性能分析[J];運籌與管理;2010年06期
2 黎鎖平;劉存明;何志鵬;;無線數據傳輸的GBN-ARQ和SR-ARQ系統(tǒng)時延性能研究[J];信號處理;2009年03期
3 黎鎖平;劉存明;;基于噪聲信道的ARQ系統(tǒng)時延性能及最小滑動窗口控制研究[J];信息與控制;2008年06期
4 時銳;楊孝宗;;自組網Random Waypoint移動模型節(jié)點空間概率分布的研究[J];計算機研究與發(fā)展;2005年12期
相關博士學位論文 前1條
1 徐明霞;Ad hoc網絡中的時分多址接入及跨層設計研究[D];浙江大學;2007年
，本文編號：2423412
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