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

NetTS- Collaborative Research - NR：Over-Probe：A Toolkit for the Management of Overlay Networks with移动的UsersMario Gerla，UCLA Award 0435515摘要该项目的主要目标是为支持移动的用户的覆盖网络开发有效的路径探测和拓扑管理方案。 覆盖层便于部署商业互联网无法提供的功能（例如，多播、QoS感知路由等）。 虽然到目前为止，传统的覆盖已经连接了固定用户，但未来的覆盖还必须支持移动的客户。 需要包括无线段甚至“机会”自组织网络（例如，城市环境中的汽车网络）。为了满足这些需求，该项目开发了OverProbe，这是一种新的工具包，包括创新的探测技术CapProbe，适用于有线和无线覆盖链路。 OverProbe非常快速地评估“虚拟链路”质量。 速度在无线中是至关重要的，因为在路径末端的用户可能跨越不同类型的无线介质（例如，3G、802.11、蓝牙、CDMA等）在几分钟内。 除了频繁监控无线连接，该工具包还可以帮助移动的用户在不中断TCP连接的情况下进行软切换。 这项研究还包括设计和评估可扩展的分层覆盖结构（使用“骨干覆盖”）。这项研究的结果将有助于在移动的社区中推广新的服务，从远程办公到电子商务和娱乐。 主要成果包括：（1）一套路径探测方法和工具（Over-Probe工具包）。 (2)两级覆盖和代理架构。 (3)PlanetLab和WHYNET中的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.