發(fā)布時間：2018-10-20 14:11

【摘要】：戰(zhàn)術(shù)數(shù)據(jù)鏈本質(zhì)上是一種數(shù)據(jù)通信系統(tǒng)，它能夠鏈接戰(zhàn)場上的傳感器平臺、指揮控制單元和武器平臺等各種作戰(zhàn)平臺，從而使各種作戰(zhàn)平臺之間快速地交換各種情報信息，實現(xiàn)戰(zhàn)場態(tài)勢和信息的共享，提高協(xié)同作戰(zhàn)的能力。 美軍下一代數(shù)據(jù)鏈系統(tǒng)TTNT針對現(xiàn)有數(shù)據(jù)鏈體制的缺陷，實現(xiàn)了近乎革命性的體制優(yōu)化。TTNT以全I(xiàn)P通信為基礎(chǔ)，，在物理層面實現(xiàn)了基于跳頻復(fù)用的全雙工無線通信能力，在鏈路層面則以全雙工通信為基礎(chǔ)實現(xiàn)了基于優(yōu)先級概率統(tǒng)計的多址接入模式SPMA(statistic priority-based multiple access)。戰(zhàn)術(shù)數(shù)據(jù)鏈的鏈路層協(xié)議或稱MAC協(xié)議描述了節(jié)點接入無線信道的規(guī)則，采用合適的MAC協(xié)議，能夠更合理地分配有限的無線帶寬資源，是戰(zhàn)術(shù)數(shù)據(jù)鏈的關(guān)鍵技術(shù)之一。 本課題研究對比了各類MAC協(xié)議的特點，針對現(xiàn)有MAC協(xié)議的缺陷，參考美國有關(guān)SPMA協(xié)議的專利，設(shè)計了基于統(tǒng)計優(yōu)先級的鏈路層協(xié)議SPMA，并以此為基礎(chǔ)在OMNET++仿真平臺上對SPMA協(xié)議進(jìn)行了建模仿真。SPMA協(xié)議對信道是否可用的判斷、基于優(yōu)先級的發(fā)送判決和“削峰填谷”的流量控制機(jī)制，有效地降低了信道沖突，保證了數(shù)據(jù)發(fā)送的實時性和高優(yōu)先級數(shù)據(jù)較高的成功傳輸概率。仿真結(jié)果表明，隨著網(wǎng)絡(luò)節(jié)點的增多，SPMA協(xié)議最高優(yōu)先級的時延保持在5毫秒左右；隨著業(yè)務(wù)量的增大，SPMA協(xié)議能夠保障最高優(yōu)先級數(shù)據(jù)包一次發(fā)送的成功率不低于90%。SPMA具有低時延、高吞吐量和較好的QoS保障等優(yōu)點，符合戰(zhàn)術(shù)數(shù)據(jù)鏈的發(fā)展趨勢。
[Abstract]:Tactical data link is essentially a kind of data communication system, which can link various combat platforms such as sensor platform, command and control unit and weapon platform on the battlefield, so that all kinds of intelligence information can be exchanged quickly between various combat platforms. The sharing of battlefield situation and information is realized, and the ability of cooperative combat is improved. The next generation data link system (TTNT) of the US military has realized nearly revolutionary system optimization in view of the defects of the existing data link system. TTNT realizes the full duplex wireless communication capability based on frequency hopping multiplexing on the physical level on the basis of full IP communication. Based on full-duplex communication, a multi-access mode SPMA (statistic priority-based multiple access). Based on priority probability statistics is implemented at link level. The link layer protocol or MAC protocol of tactical data link describes the rules of node access to wireless channel. It is one of the key technologies of tactical data link to use appropriate MAC protocol to allocate the limited wireless bandwidth resource more reasonably. This paper studies and compares the characteristics of all kinds of MAC protocols, aiming at the defects of the existing MAC protocols, referring to the patents of the SPMA protocols in the United States. The link layer protocol (SPMA,) based on statistical priority is designed and modeled on the OMNET simulation platform. The SPMA protocol is used to judge whether the channel is available or not. The priority based decision and flow control mechanism can effectively reduce the channel conflict and ensure the real-time performance of data transmission and the high probability of successful transmission of high priority data. The simulation results show that with the increase of network nodes, the delay of the highest priority of SPMA protocol remains around 5 milliseconds, and with the increase of traffic, the SPMA protocol can ensure that the success rate of sending the highest priority data packet at one time is not lower than that of 90%.SPMA. The advantages of high throughput and good QoS guarantee are in line with the development trend of tactical data link.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.2

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