發(fā)布時(shí)間：2018-08-28 09:37

【摘要】：在如今社會(huì)中無線傳感器的網(wǎng)絡(luò)發(fā)展的日益迅速,網(wǎng)絡(luò)中面臨的問題也隨之愈多,以解決網(wǎng)絡(luò)吞吐量為目的的方法尤為重要,本文針對(duì)目前無線自組網(wǎng)絡(luò)的發(fā)展現(xiàn)狀,基于多信道的傳輸技術(shù),借鑒了蜂窩網(wǎng)絡(luò)結(jié)構(gòu)的模型,將蜂窩結(jié)構(gòu)和多信道技術(shù)相結(jié)合,并添加了多信道網(wǎng)絡(luò)編碼技術(shù),使得網(wǎng)絡(luò)節(jié)點(diǎn)不但具有能夠多信道切換的功能,減少不同節(jié)點(diǎn)的數(shù)據(jù)傳輸干擾,而且利用網(wǎng)絡(luò)編碼技術(shù),提高傳輸效率,均衡網(wǎng)絡(luò)負(fù)載,至此,提出了基于蜂窩拓?fù)浣Y(jié)構(gòu)的多信道網(wǎng)絡(luò)編碼算法CNMNC。該算法是將多信道技術(shù)與網(wǎng)絡(luò)編碼的結(jié)合,其信道分配算法主要是在無線網(wǎng)絡(luò)平面中劃分出等大的信道圓區(qū)域,不同的信道圓區(qū)域使用不同的信道通信,這樣使得位于不同區(qū)域的節(jié)點(diǎn)通過不同的信道通信降低信道間的傳輸干擾。通過節(jié)點(diǎn)的相對(duì)位置建立平面直角坐標(biāo)系,同時(shí)得出信道圓的坐標(biāo)并分配信道圓的信道號(hào),通過計(jì)算節(jié)點(diǎn)的坐標(biāo)計(jì)算出節(jié)點(diǎn)所在的信道圓。在平面劃分信道圓的過程中,產(chǎn)生了信道圓區(qū)域間的交匯區(qū)域和獨(dú)立區(qū)域,這樣在通信過程中節(jié)點(diǎn)可以設(shè)置兩種通信模式,即在信道圓區(qū)域的交匯區(qū)域使用多信道通信,而在獨(dú)立區(qū)域使用單信道通信,采取這種混合的策略增加網(wǎng)絡(luò)的吞吐量和降低網(wǎng)絡(luò)能量消耗。文中的CNMNC算法利用這種區(qū)域間的不同實(shí)現(xiàn)了多射頻下的信道分配。在網(wǎng)絡(luò)的傳輸過程中,基于前面的多信道多射頻技術(shù),文章的后半段利用網(wǎng)絡(luò)編碼的理論,在數(shù)據(jù)傳輸過程中感知潛在編碼機(jī)會(huì)增加編碼包的數(shù)量,從而達(dá)到最大的網(wǎng)絡(luò)傳輸流量,提高網(wǎng)絡(luò)傳輸效率和魯棒性。CNMNC的網(wǎng)絡(luò)編碼部分是基于多信道COPE協(xié)議的改進(jìn),提出了異于傳統(tǒng)COPE協(xié)議基于一跳的多跳網(wǎng)絡(luò)編碼,這樣增強(qiáng)網(wǎng)絡(luò)的編碼感知能力,提高了網(wǎng)絡(luò)編碼的效率,降低網(wǎng)絡(luò)時(shí)延,也能夠有效的提高網(wǎng)絡(luò)的吞吐量,并且在網(wǎng)絡(luò)傳輸中增加了網(wǎng)絡(luò)的安全性。在文章最后部分,通過仿真實(shí)驗(yàn)的結(jié)果得出,通過以上方法網(wǎng)絡(luò)的吞吐量有明顯的提高同時(shí)也降低了端到端的延時(shí)。
[Abstract]:With the rapid development of wireless sensor networks in today's society, the more problems the network faces, the more important is the method to solve the problem of network throughput. This paper aims at the development of wireless ad hoc networks. Based on the transmission technology of multi-channel, using the model of cellular network structure for reference, combining cellular structure with multi-channel technology, and adding multi-channel network coding technology, the network node not only has the function of multi-channel switching. The data transmission interference of different nodes is reduced, and network coding technology is used to improve transmission efficiency and balance network load. So far, a multi-channel network coding algorithm CNMNC. based on cellular topology is proposed. This algorithm combines multi-channel technology with network coding. Its channel allocation algorithm is mainly divided into the same large channel circle area in the wireless network plane, and different channel circle area uses different channel communication. This enables nodes located in different regions to reduce inter-channel interference through different channel communications. At the same time, the coordinate of the channel circle is obtained and the channel number of the channel circle is assigned. The channel circle of the node is calculated by calculating the coordinates of the node. In the process of dividing the channel circle in plane, the intersection region and the independent area between the channel circle regions are produced. In the process of communication, two communication modes can be set up by the node, that is, the multi-channel communication is used in the intersection area of the channel circle region. Using single channel communication in the independent region, the hybrid strategy is adopted to increase the throughput of the network and reduce the network energy consumption. In this paper, the CNMNC algorithm realizes the channel assignment under multiple radio frequency (RF) by using the differences between these regions. In the process of network transmission, based on the previous multi-channel and multi-radio frequency technology, the second half of this paper uses the theory of network coding to increase the number of coding packets by perceiving the potential coding opportunities in the process of data transmission. In order to achieve the maximum network traffic, improve the network transmission efficiency and robustness. CNMNC network coding part is based on the improvement of multi-channel COPE protocol. Different from the traditional COPE protocol based on one-hop network coding. In this way, the network coding perception ability is enhanced, the efficiency of network coding is improved, the network delay is reduced, the throughput of the network is improved effectively, and the security of the network is increased in the network transmission. In the last part of the paper, the simulation results show that the throughput of the network is improved obviously and the end-to-end delay is reduced.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP212.9;TN929.5

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