【摘要】：移動自組織網(wǎng)絡具有無中心和自組織的特點,無需固定的網(wǎng)絡基礎設施支持,能夠快速地為軍事和民事應用搭建網(wǎng)絡平臺,是未來無線通信網(wǎng)絡的關鍵技術。由于移動自組織網(wǎng)絡中節(jié)點的地位是對等的,基于固定網(wǎng)絡或蜂窩網(wǎng)絡的媒體接入控制(Media Access Control,MAC)協(xié)議不能滿足移動自組織網(wǎng)絡需求,因而需要專門設計適用于自組織網(wǎng)絡的信道接入?yún)f(xié)議。“無沖突”的多址協(xié)議是目前移動自組織網(wǎng)絡多址接入?yún)f(xié)議的發(fā)展方向。本文結(jié)合移動自組織網(wǎng)絡的設計要求,提出了一種基于時分多址接入技術的信道預約協(xié)議(Channel Reservation-Time Division Multiple Access,CR-TDMA)。首先詳細地描述了協(xié)議的幀格式,分組格式,時隙的劃分原則;其次,本協(xié)議在網(wǎng)絡場景密集和稀疏時采用不同的同步廣播信道分配機制,完成節(jié)點的建網(wǎng)或入網(wǎng)過程,不僅提高了無線信道利用率,而且可以縮短分組平均接入時延;最后,根據(jù)移動自組織網(wǎng)絡的網(wǎng)絡規(guī)模、節(jié)點移動速度、業(yè)務模型等提出同步信道預約機制,完成節(jié)點預約以及釋放同步廣播信道的過程,進一步提高網(wǎng)絡性能指標。本文采用OPNET仿真軟件建立移動移動自組織網(wǎng)絡模型,在該模型下設置不同的節(jié)點移動速率、網(wǎng)絡負載、網(wǎng)絡規(guī)模等參數(shù)進行網(wǎng)絡仿真。仿真結(jié)果表明,本文設計的基于時分多址接入(Time Division Multiple Access,TDMA)的同步信道預約接入?yún)f(xié)議可以適應快速動態(tài)變化的網(wǎng)絡拓撲,有效支持突發(fā)業(yè)務對接入時延的要求,提高網(wǎng)絡吞吐量。
[Abstract]:Mobile ad hoc networks have the characteristics of no center and self organization, and can build the network platform for military and civilian applications quickly without the support of fixed network infrastructure. It is the key technology of wireless communication network in the future. Due to the peer status of nodes in mobile ad hoc networks, media access control (Media Access Control,MAC) protocols based on fixed networks or cellular networks can not meet the needs of mobile ad hoc networks. Therefore, it is necessary to design a channel access protocol for ad hoc networks. Conflict free multiple access protocol is the development direction of mobile ad hoc network multiple access protocol. In this paper, a channel reservation protocol (Channel Reservation-Time Division Multiple Access,CR-TDMA) based on time division multiple access (TDMA) is proposed to meet the design requirements of mobile ad hoc networks. Firstly, the frame format, packet format and slot partition principle of the protocol are described in detail. Secondly, different synchronous broadcast channel allocation mechanisms are used in the dense and sparse network scenarios to complete the process of network construction or access. It not only improves the utilization of wireless channel, but also shortens the average packet access delay. Finally, a synchronous channel reservation mechanism is proposed according to the network size, node mobility speed and traffic model of the mobile ad hoc network. The process of node reservation and release of synchronous broadcast channel is completed, and the network performance index is further improved. In this paper, a mobile ad hoc network model is established by using OPNET simulation software. Under this model, different node mobility rates, network load, network scale and other parameters are set up to simulate the network. The simulation results show that the proposed synchronous channel reservation protocol based on TDMA (Time Division Multiple Access,TDMA) can adapt to the fast dynamic network topology, effectively support the requirements of burst traffic for access delay, and improve the throughput of the network.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN915.04

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本文編號：2281017