發(fā)布時(shí)間：2018-06-14 21:56

  本文選題：臨近空間自組網(wǎng) + 路由協(xié)議　； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：臨近空間平臺(tái)下臨近空間飛行器具備比飛機(jī)更廣的覆蓋域,臨近空間在軍事方面的應(yīng)用成為了各國(guó)研究的熱點(diǎn)。臨近空間自組網(wǎng)能夠高效、快速的組網(wǎng),因此,具備了很高的研究?jī)r(jià)值。本文主要研究臨近空間網(wǎng)絡(luò)體系結(jié)構(gòu)中接入網(wǎng)的路由協(xié)議,以及主干網(wǎng)、接入網(wǎng)、機(jī)間網(wǎng)絡(luò)中的接入?yún)f(xié)議。基于鏈路穩(wěn)定性的路由協(xié)議的研究。針對(duì)臨近空間節(jié)點(diǎn)個(gè)數(shù)繁多以及節(jié)點(diǎn)移動(dòng)的特點(diǎn),為降低路由開銷、提高路由性能,因此,在路由協(xié)議設(shè)計(jì)時(shí)需考慮洪泛范圍以及鏈路穩(wěn)定性。本文通過(guò)對(duì)洪泛范圍設(shè)計(jì),在保證有效路徑個(gè)數(shù)的基礎(chǔ)上,減少網(wǎng)絡(luò)中控制開銷。并在此基礎(chǔ)上,對(duì)臨近空間飛行器移動(dòng)模型進(jìn)行分析,根據(jù)臨近空間飛行器作戰(zhàn)任務(wù)不同,將其分為不同的移動(dòng)群組,群組間選擇參考點(diǎn)群組移動(dòng)模型(RPGM),群組內(nèi)選擇隨機(jī)路點(diǎn)移動(dòng)模型(RWM)。由節(jié)點(diǎn)的移動(dòng)模型可知,節(jié)點(diǎn)的運(yùn)動(dòng)具有規(guī)律性,因此通過(guò)學(xué)習(xí)節(jié)點(diǎn)過(guò)去一段時(shí)間內(nèi)運(yùn)動(dòng)狀態(tài),得到節(jié)點(diǎn)間運(yùn)動(dòng)狀態(tài)序列,根據(jù)該運(yùn)動(dòng)序列的馬爾科夫性得到鏈路穩(wěn)定性狀態(tài)值。在兼顧跳數(shù)的條件下,選擇連乘積準(zhǔn)則計(jì)算路徑穩(wěn)定性值。基于統(tǒng)計(jì)業(yè)務(wù)優(yōu)先級(jí)的接入?yún)f(xié)議的研究。針對(duì)臨近空間節(jié)點(diǎn)種類以及業(yè)務(wù)種類繁多的特點(diǎn),為降低信道碰撞次數(shù)、提高重要信息的接入性能,因此,在接入?yún)f(xié)議設(shè)計(jì)時(shí)需考慮信道碰撞狀況以及不同業(yè)務(wù)、節(jié)點(diǎn)的接入性能。接入?yún)f(xié)議通過(guò)偵聽過(guò)去一段時(shí)間內(nèi)信道碰撞次數(shù),將其與預(yù)先設(shè)定的門限值進(jìn)行對(duì)比,只有當(dāng)小于門限值時(shí),才允許發(fā)送分組。同時(shí),本文將臨近空間業(yè)務(wù)進(jìn)行分類,并對(duì)其按時(shí)延敏感度進(jìn)行優(yōu)先級(jí)劃分,并且將臨近空間節(jié)點(diǎn)按重要性進(jìn)行劃分。在此基礎(chǔ)上,為保證高優(yōu)先級(jí)的業(yè)務(wù)和高級(jí)節(jié)點(diǎn)的接入性能,設(shè)計(jì)基于優(yōu)先級(jí)退避算法,使得高優(yōu)先級(jí)業(yè)務(wù)或高級(jí)用戶競(jìng)爭(zhēng)窗口值小于其他業(yè)務(wù)或用戶,從而獲得較小的退避時(shí)延。最后,利用OPNET仿真軟件對(duì)路由協(xié)議和接入?yún)f(xié)議進(jìn)行仿真,仿真結(jié)果表明,路由協(xié)議在不同節(jié)點(diǎn)個(gè)數(shù)以及不同移動(dòng)速度條件下,具有較高分組遞送率以及較低的平均斷裂次數(shù)。接入?yún)f(xié)議在不同負(fù)載的條件下,高優(yōu)先級(jí)業(yè)務(wù)和高級(jí)用戶的平均端到端時(shí)延和分組遞送率低于其他業(yè)務(wù)或用戶,并且與傳統(tǒng)CSMA協(xié)議相比,不同用戶或業(yè)務(wù)的網(wǎng)絡(luò)性能均優(yōu)于不劃分優(yōu)先級(jí)情況下。
[Abstract]:The near space vehicle has a wider coverage area than the aircraft under the near space platform, and the military application of the near space has become a hot topic in various countries. Adjoining space ad hoc network is efficient and fast, so it has high research value. In this paper, the routing protocols of access network in the architecture of adjacent space network, as well as the access protocols in the backbone network, access network and inter-computer network are studied. Research on routing Protocol based on Link Stability. In order to reduce routing overhead and improve routing performance, flood coverage and link stability should be considered in the design of routing protocols in view of the large number of nodes in adjacent space and the mobility of nodes. In this paper, the flood scope is designed to reduce the control overhead on the basis of ensuring the number of effective paths. On this basis, the moving model of the near space vehicle is analyzed. According to the different combat tasks of the near space vehicle, it is divided into different mobile groups. The group moving model of selecting reference points among groups is RPGMN, and the random path moving model of group selection is RWMN. According to the moving model of nodes, the movement of nodes is regular, so by learning the motion state of nodes over a period of time, the sequence of motion states between nodes is obtained. According to the Markov property of the motion sequence, the link stability state value is obtained. Under the condition of taking into account the number of hops, the continuous product criterion is chosen to calculate the path stability value. Research on access Protocol based on Statistical Service priority. In order to reduce the number of channel collisions and improve the access performance of important information, in order to reduce the number of channel collisions and improve the access performance of important information, in order to reduce the number of channel collisions and improve the access performance of important information, the channel collision status and different services should be considered in the design of access protocols. Node access performance. By listening for the number of channel collisions over a period of time, the access protocol compares it with the pre-set threshold, and only allows the transmission of packets when the threshold is less than the threshold. At the same time, the adjacent space business is classified, and its time-delay sensitivity is prioritized, and the adjacent space node is divided according to its importance. On this basis, in order to ensure the access performance of high-priority services and high-level nodes, a priority-based Backoff algorithm is designed, which makes the competing window value of high-priority services or advanced users smaller than that of other services or users. Thus, a smaller Backoff delay is obtained. Finally, the routing protocol and access protocol are simulated with OPNET simulation software. The simulation results show that the routing protocol has higher group delivery rate and lower average breaking times under different node numbers and different moving speeds. Under different load conditions, the average end-to-end delay and packet delivery rate of high-priority services and advanced users are lower than those of other services or users, and compared with traditional CSMA protocols. The network performance of different users or services is better than that without priority.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：V243.1;TN915.04

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 何彥峰;;淺析臨近空間平臺(tái)的軍事應(yīng)用[J];國(guó)防科技;2007年06期

相關(guān)博士學(xué)位論文 前1條

1 孫建鎮(zhèn);基于鏈路穩(wěn)定性及網(wǎng)絡(luò)編碼的無(wú)線網(wǎng)絡(luò)關(guān)鍵技術(shù)研究[D];北京郵電大學(xué);2011年

相關(guān)碩士學(xué)位論文 前1條

1 吳繼春;Ad Hoc網(wǎng)絡(luò)路由協(xié)議的研究與NS2仿真[D];武漢理工大學(xué);2005年

，

本文編號(hào)：2019083