SAGE-based Tiled Display Wall Enhanced with Dynamic Routing Functionality Triggered by User Interaction
SAGE-based Tiled Display Wall Enhanced with Dynamic Routing Functionality Triggered by User Interaction
复制标题
基于 SAGE 的平铺显示墙增强了由用户交互触发的动态路由功能
DOI：
10.1016/j.future.2015.09.033
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and Shinji Shimjo
中科院分区：
文献类型：
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作者：
Yoshiyuki Kido;Kohei Ichikawa;Susumu Date;Yasuhiro Watashiba;Hirotake Abe;Hiroaki Yamanaka;Eiji Kawai;and Shinji Shimjo
为了使从事全国或全球范围的科学发现合作项目的科学家能够进行研究，需要将大量的科学数据可视化，然后在科学家之间共享。平铺显示墙（TDW）已被广泛接受并用于大规模科学数据的可视化。可伸缩自适应图形环境（SAGE）作为一种将多个显示器组织成网络感知的大型显示器的中间件，受到了科学家的关注。使用SAGE TDW，科学家可以在单个显示器上显示多个可视化内容，每个内容都可以位于由其他组织管理的地理上遥远的站点。然而，SAGE不具有用于管理去往单个TDW的多个可视化数据流的机制。在传统网络中，同一目的地的数据流往往共享同一链路，导致数据包丢失，从而导致视觉质量差。此外，由于SAGE的灵活性，每个视觉数据流的速率可能会因TDW上的用户交互（例如移动应用程序窗口和调整其大小）而动态变化。出于上述原因，我们提出并开发了一种动态路由分配方法，该方法将数据包流切换到预期性能更好的网络链路上，以响应窗口移动和调整大小等用户交互。从技术上讲，我们利用OpenFlow（软件定义网络（SDN）的实现）将网络可编程性集成到SAGE中。在本文中，我们展示了如何SAGE增强与所提出的方法成功地避免网络拥塞，提高质量的可视化TDW在广域OpenFlow网络在互联网上。
To empower scientists who are engaged in nation-wide or global-scale collaborative projects for scientific discovery, a large amount of scientific data needs to be visualized and then shared among the scientists. Tiled Display Wall (TDW) has been widely accepted and used for visualization of large-scale scientific data. Scalable Adaptive Graphics Environment (SAGE) has received attention from scientists as a middleware that organizes multiple display monitors into a network-aware large display monitor. Using a SAGE TDW, scientists can display multiple visualized contents on a single display monitor, each of which can be located at geographically distant site managed by other organizations. However, SAGE does not have a mechanism for managing multiple visualized data streams heading to a single TDW. In a conventional network, data flows for a same destination tend to share a same link, resulting in drop of packets and therefore poor visual quality. Moreover, because of the flexible nature of SAGE, rate of each visual data flow may change dynamically as a result of user interaction on a TDW, such as moving and resizing an application window. For the reason above, we propose and develop a dynamic route allocation method that switches packet flows onto network links where better performance is expected, in response to user interaction such as window movement and resizing. Technically, we have leveraged OpenFlow, an implementation of Software Defined Networking (SDN), to integrate network programmability into SAGE. In this paper, we show how SAGE enhanced with the proposed method succeeded in avoiding network congestion and improving the quality of visualization on the TDW over the wide area OpenFlow network on the Internet.