Methods for Objective and Subjective Evaluation of Zero-Client Computing
Methods for Objective and Subjective Evaluation of Zero-Client Computing
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DOI：
10.1109/access.2019.2925083
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发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Fatma Alali;Tasha A. Adams;Rider W. Foley;D. Kilper;Ronald D. Williams;M. Veeraraghavan
中科院分区：
文献类型：
--
作者：
Fatma Alali;Tasha A. Adams;Rider W. Foley;D. Kilper;Ronald D. Williams;M. Veeraraghavan
零客户端是基于硬件的设备，没有从远程计算系统向用户提供虚拟桌面(VDS)的中央处理单元(CPU)。我们测量了通过零客户端访问的应用程序的性能，以研究使用此方法在网络中提供桌面PC体验的可行性。性能评估很复杂，因为监控软件无法下载到零个客户端。因此，我们引入了一种新的方法和度量来衡量零客户端VD性能，该方法基于网络流量分析。我们进行了客观和主观研究，以确定特定于应用的指标对不同网络条件的敏感性。结果表明，对于视频流等应用，丢包率(PLR)会影响零客户端的性能。主观测试显示，与图像观看或Skype相比，用户对视频流的PLR更敏感。在客观和主观测量之间发现了很强的相关性，但这些测量随着PLR的增加而变化的速度因应用而不同。
Zero clients are hardware-based devices without a central processing unit (CPU) that deliver virtual desktops (VDs) from remote computing systems to users. We measured the performance of applications accessed through zero clients to study the feasibility of using this approach to provide a desktop-pc experience across a network. Performance evaluation is complicated because monitoring software cannot be downloaded to the zero clients. Therefore, we introduce a new methodology and metric to measure zero-client VD performance that is based on network-traffic analysis. We conducted objective and subjective studies to determine the sensitivity of application-specific metrics to different network conditions. The results show that the packet loss rate (PLR) impacts zero-client performance for some applications such as video streaming. Subjective tests showed a greater user sensitivity to the PLR for video streaming than for image viewing or Skype. A strong correlation was found between the objective and subjective measurements but the rate at which these measurements changed with increasing PLR differed depending on the application.