一种优化spice协议的探针反馈机制-计算机科学.pdfVIP

第 43 卷第11 期 计算机科学 Vo 1. 43 No. 11 2016 年 11 月 Computer Science Nov 2016 一种优化 SPICE 协议的探针反馈机制 程长军刘丹 (电子科技大学电子科学技术研究院 成都 611731) 摘 要针对云桌面协议(Simple Protocol for Independent Computing Environments ,SPICE)存在的问题:在用户交互 较多的场景显示时延太大、播放视频时可能导致其它操作不能得到及时响应，在原有架构上构建了一个探针通道，根 据探针采集反馈结采分别对视频和言交互场景增加了不同的可切换策略。视频场景中，探针采集了其它各个遥遥的 丢包率和时延，综合权重计算出显示通道的带宽上限;富交互场景中，探针采集用户对设备使用的频率，在高频率时通 过减少服务端推送时间间隔使显示及时刷新。在不同场景下的测试表明该方法能有效地提升视频和言交互场景下的 表现。 关键词 SPICE，桌面虚拟化，探针通道，富交互 中图法分类号 TP319 文献标识码 A 001 10. 11896/j. issn. 1002-137叉 2016.1 1. 037 Sniffer-feedback M配hanism of Improving SPICE Protocol CHENG Chang-jun LIU Dan CResearch Institute of Electronic Science and Technology. University of Electronic Science and Technology of China. Chen部lu 611731.China) Abstract According to the present problems of the SPICE (Simple Protocol for Independent Computing Environ ments) :too large delay in multi-interaction scene and no response sometimes during playing video , sniff channel in ori gin structure was built ,then some flexible policies for multi-interaction and video scenes based on feedback data from the channel were added. During playing video , SPICE server calculates a proper bandwidth from time-delay and the packet-loss-rate collected from the other channels. In multi-interaction scene ,the server changes refresh interval d严mml cally based on the activities of input devices. The experiment results in different scenes show that it can improve the performance effectively. Keywords SPICE ,Desktop virtualization , Sniff channel ,Multi-interaction 性高等优点。但 SPICE 本身也有一些