本文選題：無線Mesh網(wǎng)絡 + 視頻傳輸��； 參考：《中國礦業(yè)大學》2014年碩士論文

【摘要】：無線Mesh網(wǎng)絡的應用環(huán)境，逐漸要求支撐視頻業(yè)務流的可靠傳輸。視頻業(yè)務流的實時性、海量性、集成性等傳輸要求，需要無線Mesh網(wǎng)絡提供可靠的帶寬，較小的端到端時延，均衡負載等QoS保障。但無線網(wǎng)絡在視頻業(yè)務應用時，易出現(xiàn)網(wǎng)絡連接中斷，，端到端時延大等問題。相比傳統(tǒng)的單一路徑傳輸，多徑傳輸在網(wǎng)絡傳輸穩(wěn)定性、平衡網(wǎng)絡負載等方面更具優(yōu)勢。但現(xiàn)有多徑路由協(xié)議在視頻傳輸時，面臨時延較大和可靠性較低的不足。本文針對上述多徑路由存在的不足，提出了基于QoS保障的多徑路由選擇算法以提高無線視頻傳輸?shù)木W(wǎng)絡性能。 首先，本文對無線Mesh網(wǎng)絡、無線視頻傳輸以及QoS保障的多徑路由協(xié)議的研究現(xiàn)狀進行了歸納總結(jié)，并針對多徑路由協(xié)議在無線網(wǎng)絡中視頻業(yè)務應用中實時性和連續(xù)性不足的問題，提出了基于QoS保障的多徑路由協(xié)議QoS-MPOLSR。協(xié)議首先通過廣播HELLO消息來收集相鄰節(jié)點和鏈路間的QoS信息，然后通過優(yōu)先級函數(shù)量化計算以衡量鏈路可靠性，最后采用基于QoS保障的QoS-Dijkstra算法進行多徑路由查找，以獲得從源節(jié)點到目的節(jié)點的多徑路由。QoS-MPOLSR是源路由協(xié)議，為了避免數(shù)據(jù)傳輸過程中的路由失效問題，有效的路由恢復技術被提出。 其次，設計了無線Mesh網(wǎng)絡視頻傳輸Testbed，對OLSR deamon進行改進，編寫多徑模塊和網(wǎng)絡過濾模塊實現(xiàn)了QoS-MPOLSR deamon，實現(xiàn)了視頻在無線多跳網(wǎng)絡的實時傳輸和在線顯示。 最后，使用NS2、MyEvalid等網(wǎng)絡仿真軟件，評估QoS-MPOLSR協(xié)議的網(wǎng)絡性能。通過與其他協(xié)議的性能比較可知，QoS-MPOLSR協(xié)議在無線視頻網(wǎng)絡傳輸方面更具優(yōu)勢。另外，在無線Mesh網(wǎng)絡Testbed測試實際的多徑實時視頻傳輸，得出QoS-MPOLSR協(xié)議應用于實時視頻傳輸時，較OLSR協(xié)議表現(xiàn)出更好的可靠性和穩(wěn)定性。
[Abstract]:The application environment of wireless mesh network requires the reliable transmission of video traffic. The real-time, magnanimity and integration of video traffic require wireless mesh network to provide reliable bandwidth, small end-to-end delay, load balancing and other QoS guarantees. However, in the application of video service, wireless network is prone to network connection interruption and end-to-end delay. Compared with traditional single path transmission, multipath transmission has more advantages in network transmission stability and network load balance. However, the existing multipath routing protocols face the disadvantages of long delay and low reliability in video transmission. In order to improve the network performance of wireless video transmission, a QoS guaranteed multipath routing algorithm is proposed in this paper. Firstly, this paper summarizes the research status of wireless mesh network, wireless video transmission and QoS guaranteed multipath routing protocol. Aiming at the shortage of real-time and continuity in the application of multipath routing protocol in wireless network, a QoS guaranteed QoS MPOLSR-based multipath routing protocol is proposed. Firstly, the protocol collects QoS information between adjacent nodes and links by broadcasting Hello messages, then quantifies the priority function to measure the link reliability. Finally, the QoS-Dijkstra algorithm based on QoS guarantees is used for multipath routing lookup. In order to obtain the multipath route from source node to destination node, the QoS-MPOLSR is a source routing protocol. In order to avoid the routing failure in the process of data transmission, an effective routing recovery technique is proposed. Secondly, we design the wireless mesh network video transmission testbed, improve the OLSR deamon, write multipath module and network filtering module to realize the QoS MPOLSR deamon, and realize the real-time transmission and online display of video in wireless multi-hop network. Finally, the QoS-MPOLSR network performance is evaluated by using NS2 / MyEvalid and other network simulation software. Compared with other protocols, the QoS-MPOLSR protocol has more advantages in wireless video transmission. In addition, by testing the real multipath real-time video transmission in wireless mesh network Testbed, it is concluded that the QoS MPOLSR protocol is more reliable and stable than the OLSR protocol when it is applied to real-time video transmission.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

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本文編號：2065245