發(fā)布時間：2019-01-19 20:07

【摘要】：戰(zhàn)術通信網(wǎng)是戰(zhàn)場指揮控制系統(tǒng)的重要組成部分。通過網(wǎng)絡仿真的方法研究網(wǎng)絡性能和網(wǎng)絡協(xié)議,不僅降低研發(fā)成本,而且能夠為構建高效的戰(zhàn)術指揮控制系統(tǒng)提供重要的參考依據(jù)。在實際情況下,戰(zhàn)術通信網(wǎng)需要通過不同子網(wǎng)之間的協(xié)作來實現(xiàn)特定的戰(zhàn)術目標。通過網(wǎng)絡仿真軟件進行研究雖然簡單高效,但是已有節(jié)點模型、時隙分配算法以及網(wǎng)絡結構模型已無法滿足需求,需要結合戰(zhàn)術通信網(wǎng)的實際需求重新設計。文中將大規(guī)模軍用Ad Hoc網(wǎng)絡仿真模型的研究與實現(xiàn)分為了兩個階段:局域戰(zhàn)術通信網(wǎng)和大規(guī)模軍用Ad Hoc戰(zhàn)術通信網(wǎng)。局域戰(zhàn)術通信網(wǎng)由單個子網(wǎng)組成,該階分析了目前已有的幾種時隙分配算法,結合戰(zhàn)術通信網(wǎng)的實際需求和節(jié)點生成報文的特性提出了一種符合馬爾科夫過程的混合時隙分配算法。大規(guī)模軍用Ad Hoc戰(zhàn)術通信網(wǎng)將網(wǎng)絡的節(jié)點分為簇首節(jié)點和簇成員節(jié)點,將成員節(jié)點模型的搭建分為了兩個部分。第一部分,設計了一種具有TDMA時隙分配方式和應用層收發(fā)包功能的簇成員節(jié)點模型,并由該模型和仿真軟件中提供的路由節(jié)點模型搭建了具有路由轉發(fā)功能的局域戰(zhàn)術通信網(wǎng),分析了不同遠近程度的報文對戰(zhàn)術通信網(wǎng)端到端延遲的影響。第二部分,設計了一種具有應用層收發(fā)包功能的簇首節(jié)點,結合簇成員模型,將大規(guī)模通信網(wǎng)分為了旅、營、連和車四個層次,針對這四級節(jié)點的報文數(shù)量特征提出了一種按比例分配時隙的算法。在OPNET仿真軟件中分別對這兩個階段進行了建模仿真,收集了不同報文長度下三種通信網(wǎng)的端到端延遲。仿真結果表明采用混合時隙分配算法的局域戰(zhàn)術通信網(wǎng)在端到端延遲方面相對于采用固定時隙分配算法有明顯的提高。在具有路由轉發(fā)功能的局域戰(zhàn)術通信網(wǎng)中設計了簇成員節(jié)點模型,在仿真過程中隨著報文長度和報文目的地址的變化所收集到的端到端延遲與理論計算值相符,有較好的可行性。采用分層結構的大規(guī)模軍用Ad Hoc戰(zhàn)術通信網(wǎng)中,簇首節(jié)點模型和簇成員節(jié)點模型都具有主動收發(fā)包功能,其仿真結果與實際計算數(shù)據(jù)相比誤差在允許范圍內,說明搭建的仿真模型及仿真系統(tǒng)有較高的置信度。
[Abstract]:Tactical communication network is an important part of battlefield command and control system. The research of network performance and network protocol through network simulation can not only reduce the cost of research and development, but also provide an important reference for the construction of an efficient tactical command and control system. In practice, tactical communication networks need to achieve specific tactical objectives through cooperation among different subnets. Although the research on network simulation software is simple and efficient, the existing node model, slot allocation algorithm and network structure model can not meet the requirements, which need to be redesigned in combination with the actual demand of tactical communication network. In this paper, the simulation model of large-scale military Ad Hoc network is divided into two stages: local tactical communication network and large-scale military Ad Hoc tactical communication network. The local tactical communication network is composed of a single subnet. In this order, several existing slot allocation algorithms are analyzed. According to the actual requirements of tactical communication network and the characteristics of node generating packets, a hybrid slot allocation algorithm is proposed, which accords with Markov process. The large-scale military Ad Hoc tactical communication network divides the nodes of the network into cluster head node and cluster member node, and the member node model is divided into two parts. In the first part, a cluster member node model with the function of TDMA slot allocation and application layer packet sending and receiving is designed, and a local tactical communication network with routing and forwarding function is built by the model and the routing node model provided in the simulation software. The effects of different degrees of packets on the end-to-end delay of tactical communication networks are analyzed. In the second part, a cluster head node with the function of sending and receiving packets in the application layer is designed. Combined with the cluster member model, the large-scale communication network is divided into four levels: brigade, battalion, company and vehicle. In this paper, an algorithm of proportional allocation of time slots is proposed for the quantitative features of the four-level nodes. In the OPNET simulation software, the two stages are modeled and simulated, and the end-to-end delay of three communication networks with different message length is collected. The simulation results show that the end-to-end delay of the local tactical communication network using hybrid slot allocation algorithm is significantly higher than that of the fixed slot allocation algorithm. In the local tactical communication network with routing and forwarding function, a cluster member node model is designed. The end-to-end delay collected in the simulation process is consistent with the theoretical calculation value with the change of the packet length and the destination address of the packet. There is good feasibility. In the large-scale military Ad Hoc tactical communication network with hierarchical structure, both the cluster head node model and the cluster member node model have the function of active receiving and sending packets. The simulation results are within the allowable range compared with the actual calculated data. It shows that the simulation model and simulation system have high confidence.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5

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