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A QoE-perceived screen updates transmission scheme in desktop virtualization environment

机译：桌面虚拟化环境中QoE感知的屏幕更新传输方案

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摘要

As a solution for cloud computing, desktop virtualization realizes the remote execution of applications and feeds back execution results in the form of screen updates through network, aiming to offer users the same experience as operating in local systems. It is challenging to achieve this goal since timeliness and reliability should be both guaranteed during the process of screen updates transmission, but the two requirements tend to be difficult to be satisfied simultaneously. Reliable transmission will induce more latency to perform reliable mechanisms, which can influence the timely delivery of screen updates. Timely transmission just provides a best-effort data delivery service, failing to react well to unfavorable network conditions. In order to cope with this problem, we propose a Partially Reliable Transmission Scheme (PRTS) for screen updates transmission in desktop virtualization environment. It tries to make trade-offs between timeliness and reliability and employs a QoE-perceived model to sense the visual quality experienced by users. Distinguished with existing transmission schemes, PRTS adjusts its sending strategy not only according to current network conditions, but also according to users' QoE. The experimental results show that PRTS can improve the transmission efficiency of screen updates and also the visual quality in desktop virtualization environment under different network conditions.
机译：作为云计算的解决方案，桌面虚拟化可实现应用程序的远程执行，并通过网络以屏幕更新的形式反馈执行结果，旨在为用户提供与在本地系统中操作相同的体验。实现这一目标具有挑战性，因为在屏幕更新传输过程中既要保证及时性又要保证可靠性，但是很难同时满足这两个要求。可靠的传输将导致更多延迟来执行可靠的机制，这可能会影响屏幕更新的及时交付。及时的传输只能提供尽力而为的数据传输服务，无法对不利的网络条件做出很好的反应。为了解决此问题，我们提出了一种用于桌面虚拟化环境中的屏幕更新传输的部分可靠传输方案（PRTS）。它试图在及时性和可靠性之间做出权衡，并采用QoE感知模型来感知用户体验到的视觉质量。与现有的传输方案不同，PRTS不仅根据当前的网络状况，而且根据用户的QoE调整其发送策略。实验结果表明，PRTS可以提高屏幕更新的传输效率，还可以提高不同网络条件下桌面虚拟化环境下的视觉质量。

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