近距離空地協(xié)作視頻自組織通信路由協(xié)議研究
[Abstract]:The close air (UAV) ground (unmanned aerial vehicle) cooperative self-organizing communication network has the characteristics of convenient networking, strong mobility and good concealment. It can be widely used in military reconnaissance and civil disaster relief and other fields. However, close-ground cooperative video self-organization communication is affected by network topology changes and wireless transmission instability. In the process of video transmission, large delay and high packet loss rate affect the real-time transmission and transmission reliability. In this paper, aiming at the problem of high time delay of close air cooperative video self-organization communication, a real-time priority routing algorithm is proposed, aiming at the problem of high packet loss rate of close-air cooperative video self-organization communication. A reliability first routing algorithm for video self-organizing communication is proposed, which provides a reference for the realization of real-time and reliable transmission of self-organized video in close space collaboration. The main contents and contributions of this paper are as follows: (1) for the close-air cooperative environment, the factors that affect the real-time performance of self-organized video communication are analyzed, such as the number of relay forwarding and the number of route reconstruction. Based on the prediction of Markov chain and the prediction of node movement direction, a real-time priority routing algorithm based on node motion direction prediction (M-AODV) Markov-Predict AODV). (M-AODV) is proposed in this paper. The results show that the proposed algorithm can effectively reduce the video transmission delay. Compared with the AODV protocol, the video transmission delay is reduced by 5%, and the real-time of video transmission is enhanced. (2) the factors that affect the reliability of video self-organizing transmission are analyzed in the close-space cooperative environment. For example, channel bandwidth and video transmission rate are available in the network. Using fuzzy logic reasoning, the available channel bandwidth between nodes is estimated, and the channel capacity is used as the basis for routing selection. A Reliability first routing algorithm for Video Ad Hoc Communication based on Channel available bandwidth estimation based on AODV routing method (AB-AODV,Available Bandwidth Predict AODV).) The results show that the proposed algorithm can effectively reduce the packet loss rate of video transmission, reduce the packet loss rate of video transmission by 15% compared with the AODV protocol, and enhance the transmission reliability of video. (3) Design and implement the verification system of close distance cooperative video self-organizing communication protocol. Using the correlation function of V4L2 (Video for Linux 2, the video capture based on USB camera is designed and implemented; the compression and display function of video frame is designed and realized by using jpeg algorithm; the packet partition transmission of video frame is designed and realized. The efficiency of video transmission is improved. The program is transplanted to the demonstration platform of cooperative video self-organization communication, and the video self-organization communication is tested. From the point of view of routing stability, this paper studies the real-time routing algorithm for video transmission, the routing algorithm for the reliability of video transmission from the point of view of available bandwidth of transmission link, and the routing algorithm for video transmission reliability on the air-ground collaboration platform. The proposed algorithm is validated by testing the short distance video self-organization communication protocol.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TN915.04
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