本文選題：水聲傳感器網(wǎng)絡(luò) + MAC協(xié)議　； 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：水聲傳感器網(wǎng)絡(luò)因其傳播時(shí)延大,誤碼率高,多徑現(xiàn)象嚴(yán)重,多普勒效應(yīng)明顯,可用帶寬窄等的特點(diǎn),無法使用陸地上成熟的MAC協(xié)議,而MAC協(xié)議主要負(fù)責(zé)分配共享的信道資源,減少節(jié)點(diǎn)傳輸?shù)臄?shù)據(jù)包的碰撞,對(duì)于網(wǎng)絡(luò)的正常通信至關(guān)重要。本文在充分考慮到水聲傳感器網(wǎng)絡(luò)特點(diǎn)的基礎(chǔ)上,針對(duì)移動(dòng)節(jié)點(diǎn)接入小規(guī)模固定傳感器網(wǎng)絡(luò)這一特殊應(yīng)用,設(shè)計(jì)出能保證移動(dòng)節(jié)點(diǎn)及時(shí)無碰撞接入的水下MAC協(xié)議。針對(duì)移動(dòng)節(jié)點(diǎn)接入小規(guī)模單跳傳感器網(wǎng)絡(luò),本文設(shè)計(jì)了 LTM-MAC協(xié)議。在有移動(dòng)節(jié)點(diǎn)接入時(shí),給予移動(dòng)節(jié)點(diǎn)足夠高的優(yōu)先級(jí),讓其及時(shí)、無碰撞地接入靜態(tài)網(wǎng)絡(luò)發(fā)送數(shù)據(jù);而在無移動(dòng)節(jié)點(diǎn)接入時(shí)固定節(jié)點(diǎn)就按照使得空閑等待時(shí)延最小的發(fā)送順序來發(fā)送數(shù)據(jù)。仿真和實(shí)驗(yàn)表明LTM-MAC協(xié)議在吞吐率,能量有效性尤其是移動(dòng)節(jié)點(diǎn)的接入時(shí)延等方面均體現(xiàn)出了優(yōu)越性。針對(duì)移動(dòng)節(jié)點(diǎn)接入小規(guī)模多跳傳感器網(wǎng)絡(luò),本文設(shè)計(jì)了 TMM-MAC協(xié)議。為應(yīng)對(duì)隱藏終端和暴露終端問題研究設(shè)計(jì)高效的時(shí)隙分配算法,制定移動(dòng)節(jié)點(diǎn)接入機(jī)制,并利用多跳特性,允許與移動(dòng)節(jié)點(diǎn)互不干擾的固定節(jié)點(diǎn)并行發(fā)送數(shù)據(jù),從而提高信道的利用效率。另外,考慮到水下傳播時(shí)延大的問題,根據(jù)數(shù)據(jù)包的長(zhǎng)短設(shè)計(jì)出不同的發(fā)送機(jī)制,從而充分利用信道,提高網(wǎng)絡(luò)吞吐率。仿真和實(shí)驗(yàn)表明TMM-MAC達(dá)到了設(shè)計(jì)要求,除了更高的吞吐率和能量使用效率之外,能保證移動(dòng)節(jié)點(diǎn)更快接入。
[Abstract]:Due to its large propagation delay, high bit error rate, serious multipath phenomenon, obvious Doppler effect and available bandwidth, underwater acoustic sensor networks are unable to use the mature MAC protocol on land. The MAC protocol is mainly responsible for allocating shared channel resources. Reducing the collision of data packets transmitted by nodes is very important for the normal communication of the network. Based on considering the characteristics of underwater acoustic sensor networks and aiming at the special application of mobile nodes accessing small scale fixed sensor networks, this paper designs an underwater MAC protocol which can guarantee the collision free access of mobile nodes in time. In this paper, LTM-MAC protocol is designed for mobile nodes to access small scale single hop sensor networks. When there is a mobile node access, the mobile node is given sufficient priority so that it can access the static network to send data in a timely and collision-free manner. In the absence of mobile node access, the fixed node sends the data in the order that the idle waiting delay is minimized. Simulation and experiments show that LTM-MAC protocol has advantages in throughput, energy efficiency, especially the access delay of mobile nodes. In this paper, TMM-MAC protocol is designed for mobile nodes to access small scale multi-hop sensor networks. In order to solve the problem of hidden terminal and exposed terminal, an efficient slot allocation algorithm is designed, and a mobile node access mechanism is developed, and the multi-hop feature is used to allow the mobile node to send data in parallel with the fixed node that is not interfering with each other. Thus, the efficiency of channel utilization is improved. In addition, considering the problem of large underwater propagation delay, different transmission mechanisms are designed according to the length of data packets, so as to make full use of the channel and improve the throughput of the network. Simulation and experimental results show that TMM-MAC meets the design requirements and can ensure faster access to mobile nodes in addition to higher throughput and energy efficiency.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.3;TP212.9

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本文編號(hào)：2015386