LPTP協(xié)議的設(shè)計(jì)與實(shí)現(xiàn)
發(fā)布時間：2019-07-01 21:12
【摘要】：隨著分布式、網(wǎng)格以及并行等各種計(jì)算機(jī)網(wǎng)絡(luò)技術(shù)的共同發(fā)展,云計(jì)算做為一種新的計(jì)算機(jī)網(wǎng)絡(luò)結(jié)構(gòu)產(chǎn)生了,同時也通過它的云桌面、云存儲、云應(yīng)用、云處理使我們的生活更加便利高端。當(dāng)然云桌面做為一切云計(jì)算應(yīng)用以及服務(wù)向用戶提供接口的載體,它的實(shí)時性也就是用戶的可感知度是一款云桌面在用戶心目中好用與否的重要標(biāo)準(zhǔn)。然而各種圖片在云計(jì)算網(wǎng)絡(luò)下載中占著越來越多的重要比例,因?yàn)閭鹘y(tǒng)的網(wǎng)絡(luò)中傳遞圖片的方式是使用TCP進(jìn)行傳輸,它提供一類可靠的、有序的字節(jié)流傳輸,也正是因?yàn)橛行蜃止?jié)流傳輸這種特性,對云計(jì)算網(wǎng)絡(luò)下載圖片數(shù)據(jù)就產(chǎn)生了過多的約束,從而在較繁忙的網(wǎng)絡(luò)環(huán)境中使得云桌面中的圖片實(shí)時顯示的用戶體驗(yàn)變差。經(jīng)過分析測試,圖片傳輸過程中,客戶端接收到的圖片的質(zhì)量隨著時間的推移出現(xiàn)一種不連續(xù)性,也就是說,當(dāng)部分圖片數(shù)據(jù)到達(dá)云桌面客戶端時,這種基于TCP的有序的字節(jié)流傳遞的途徑會阻止云桌面客戶端上層云桌面應(yīng)用的對部分圖片的加工和渲染。從而最終的結(jié)果就是,云桌面客戶端對圖片的解碼、渲染就呈現(xiàn)出夾雜著長期閑置等待時間在內(nèi)地一陣一陣的間歇性的工作,而不是隨著時間的推移很平滑的進(jìn)行解碼渲染。這篇論文就描述輕量級圖片傳輸協(xié)議(LPTP)的設(shè)計(jì)、實(shí)現(xiàn)、評估,協(xié)議主要用于對于在易于丟包的擁塞網(wǎng)絡(luò)環(huán)境或者無線網(wǎng)絡(luò)環(huán)境中圖片傳輸。在云桌面客戶端隨著時間的推移,通過峰值信噪比的線圖測量LPTP協(xié)議的可感知度,使用應(yīng)用層框架和無序的應(yīng)用數(shù)據(jù)單元的傳遞的結(jié)合,改善了客戶端云桌面圖片傳輸中用戶感受到的延遲。LPTP運(yùn)行于UDP上,并且實(shí)現(xiàn)了云桌面客戶端驅(qū)動的選擇可靠性,使用成熟的擁塞管理機(jī)制(CM)去適應(yīng)網(wǎng)絡(luò)的擁塞,并且可以為特定的圖片壓縮編碼形式定制,如JEPG、JPEG2000來優(yōu)化進(jìn)一步的交互性和圖片重構(gòu)響應(yīng)能力。用一個易于丟包的網(wǎng)絡(luò)來做性能測試的環(huán)境,來證明LPTP對于促進(jìn)云桌面客戶端下載圖片時的交互性的益處。雖然說是探索的云桌面圖片傳輸,可是LPTP是一種有選擇可靠性的單播傳輸協(xié)議,是一種擁有擁塞控制并且能夠訂制為特定應(yīng)用和編碼形式服務(wù)的協(xié)議。
[Abstract]:With the common development of distributed, grid and parallel computer network technology, cloud computing as a new computer network structure has emerged, but also through its cloud desktop, cloud storage, cloud applications, cloud processing makes our life more convenient and high-end. Of course, cloud desktop as the carrier of all cloud computing applications and services to provide interfaces to users, its real-time, that is, the awareness of users is an important standard for whether a cloud desktop is easy to use in the eyes of users. However, all kinds of pictures account for more and more important proportion in cloud computing network download, because the traditional way of transmitting pictures in the network is to use TCP for transmission, which provides a kind of reliable and orderly bytecode transmission, and it is precisely because of the characteristic of ordered bytecode transmission that there are too many constraints on cloud computing network to download picture data. Thus, in the busy network environment, the user experience of real-time display of pictures in the cloud desktop becomes worse. After analysis and test, in the process of picture transmission, the quality of the picture received by the client appears a kind of discontinuity with the passage of time, that is to say, when part of the picture data reaches the cloud desktop client, this TCP-based orderly bytecode stream transmission approach will prevent the processing and rendering of some pictures in the upper cloud desktop application of the cloud desktop client. The final result is that the cloud desktop client decodes the picture, rendering with a long period of idle waiting time in the mainland intermittent work, rather than decoding and rendering smoothly with the passage of time. This paper describes the design, implementation, evaluation and protocol of lightweight picture transmission protocol (LPTP), which is mainly used for picture transmission in congested network environment or wireless network environment where packet loss is easy to be lost. Over time, the perceptible knowledge of LPTP protocol is measured by peak signal-to-noise ratio (PSNR) diagram, and the delay felt by users in cloud desktop image transmission is improved by using the combination of application layer framework and disordered application data unit transmission. LPTP runs on UDP, and realizes the reliability of cloud desktop client-driven selection. The mature congestion management mechanism (CM) is used to adapt to the congestion of the network, and it can be customized for specific picture compression coding forms, such as JEPG,JPEG2000 to optimize further interaction and picture reconstruction response ability. Using a network that is easy to lose packets to do performance testing environment to prove the benefits of LPTP in promoting the interaction of cloud desktop clients when downloading pictures. Although it is an exploratory cloud desktop image transmission, LPTP is a selective and reliable unicast transmission protocol, which has congestion control and can be customized to serve specific applications and coding forms.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.04
本文編號：2508797
[Abstract]:With the common development of distributed, grid and parallel computer network technology, cloud computing as a new computer network structure has emerged, but also through its cloud desktop, cloud storage, cloud applications, cloud processing makes our life more convenient and high-end. Of course, cloud desktop as the carrier of all cloud computing applications and services to provide interfaces to users, its real-time, that is, the awareness of users is an important standard for whether a cloud desktop is easy to use in the eyes of users. However, all kinds of pictures account for more and more important proportion in cloud computing network download, because the traditional way of transmitting pictures in the network is to use TCP for transmission, which provides a kind of reliable and orderly bytecode transmission, and it is precisely because of the characteristic of ordered bytecode transmission that there are too many constraints on cloud computing network to download picture data. Thus, in the busy network environment, the user experience of real-time display of pictures in the cloud desktop becomes worse. After analysis and test, in the process of picture transmission, the quality of the picture received by the client appears a kind of discontinuity with the passage of time, that is to say, when part of the picture data reaches the cloud desktop client, this TCP-based orderly bytecode stream transmission approach will prevent the processing and rendering of some pictures in the upper cloud desktop application of the cloud desktop client. The final result is that the cloud desktop client decodes the picture, rendering with a long period of idle waiting time in the mainland intermittent work, rather than decoding and rendering smoothly with the passage of time. This paper describes the design, implementation, evaluation and protocol of lightweight picture transmission protocol (LPTP), which is mainly used for picture transmission in congested network environment or wireless network environment where packet loss is easy to be lost. Over time, the perceptible knowledge of LPTP protocol is measured by peak signal-to-noise ratio (PSNR) diagram, and the delay felt by users in cloud desktop image transmission is improved by using the combination of application layer framework and disordered application data unit transmission. LPTP runs on UDP, and realizes the reliability of cloud desktop client-driven selection. The mature congestion management mechanism (CM) is used to adapt to the congestion of the network, and it can be customized for specific picture compression coding forms, such as JEPG,JPEG2000 to optimize further interaction and picture reconstruction response ability. Using a network that is easy to lose packets to do performance testing environment to prove the benefits of LPTP in promoting the interaction of cloud desktop clients when downloading pictures. Although it is an exploratory cloud desktop image transmission, LPTP is a selective and reliable unicast transmission protocol, which has congestion control and can be customized to serve specific applications and coding forms.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.04
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1 劉浩;LPTP協(xié)議的設(shè)計(jì)與實(shí)現(xiàn)[D];電子科技大學(xué);2014年
，本文編號：2508797
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