NeTS - Collaborative Research - NR: Over-Probe: A Toolkit for the Management of Overlay Networks with Mobile Users

NETS-Collaborative Research(简写为NR)：Over-Probe：一种用于管理具有移动用户的覆盖网络的工具包Mario Gerla，UCLA奖0435515摘要本项目的主要目标是为支持移动用户的覆盖网络开发高效的路径探测和拓扑管理方案。覆盖便于部署商业互联网中不可用的功能(例如，多播、感知服务质量的路由等)。虽然到目前为止，传统的覆盖网络已经连接了固定用户，但未来的覆盖网络必须也支持移动客户。为了响应这种需求，本项目开发了OverProbe，这是一种新的工具包，它包括创新的探测技术CapProbe，它同时适用于有线和无线覆盖链路。OverProbe可以非常快速地评估“虚拟链路”的质量。速度在无线中非常重要，因为路径末端的用户可能会跨越不同类型的无线媒体(例如3G、802.11、蓝牙、码分多址等)移动。几分钟之内。除了对无线连接的频繁监控外，该工具包还可以帮助移动用户进行软切换，而不会中断TCP连接。这项研究还包括可扩展的分层覆盖结构的设计和评估(使用“骨干覆盖”)。这项研究的结果将有助于在移动社区中推广从远程办公到电子商务和娱乐的新服务。主要成果包括：(1)一套路径探测方法和工具(Over-Probe工具包)。(2)两级覆盖和代理体系结构。(3)在PlanetLab和WHYNET上的OverProbe实现。

NeTS - Collaborative Research - NR: Over-Probe: A Toolkit for the Management of Overlay Networks with Mobile UsersMario Gerla, UCLAAward 0435515AbstractThe main goal of this project is to develop efficient path probing and topology management schemes for overlays that support mobile users. Overlays facilitate the deployment of functions not available from the commercial Internet (e.g., multicasting, QoS-aware routing etc.). While conventional overlays so far have connected stationary users, the overlays of the future must support also mobile customers. There is need for hybrid wired and wireless overlays that include wireless segments and even "opportunistic" ad hoc networks (e.g., networks of cars in an urban environment).To respond to such needs, this project develops OverProbe, a new toolkit that includes the innovative probing technique CapProbe and works for both wired and wireless overlay links. OverProbe evaluates "virtual link" quality very rapidly. Speed is critical in wireless since the user at the end of the path may move across different type of wireless media (e.g., 3G, 802.11, Bluetooth, CDMA, etc.) within minutes. Besides frequent monitoring of wireless connectivity, the toolkit assists mobile users in soft handoff without breaking TCP connections. The research also includes the design and evaluation of scalable, hierarchical overlay structures (using "backbone overlays").The results of this research will help promote new services among the mobile community, from telecommuting, to e-commerce and entertainment. Key results include: (1) A set of path probing methodologies and tools (Over-Probe toolkit). (2) A two level overlay and proxy architecture. (3) OverProbe implementation in PlanetLab and WHYNET.