CAREER: Network Samaritans (NETSAM): Network-Assisted Service for the Internet

职业：网络撒玛利亚人 (NETSAM)：互联网网络辅助服务

• 批准号: 0724741
• 负责人: Christos Papadopoulos
• 金额: $ 15.97万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-16 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0724741&HistoricalAwards=false
• 关键词: CAREER; Network; Samaritans; NETSAM; Assisted

The end-to-end argument is a fundamental principle of the Internet architecture. The commercializationof the Internet, however, has brought new requirements like trust, QoS, ISP differentiation, third partyinvolvement and less sophisticated users. These requirements have prompted the rethinking of the end-to-endprinciple in a quest for a new Internet architecture. Past experience indicates that the development of anew architecture will likely be a long process, rich with debate and will draw from a vast and often unchartedsolution space. This research will investigate part of the solution space, namely the viability and suitability of NetworkAssisted Services as a possible component of the future Internet architecture. A network-assistance archi-tecture called Network Samaritans (NetSam) is defined to map the framework for such services. NetSam is motivated by the observation that many new requirements seemingly require new mechanisms in the net-work. Unlike Active Networks, NetSam is a moderate, yet careful step towards an enhanced network that provides a set of services beyond basic forwarding, but spiritually very distant from the malleable network of AN. NetSam preserves the architectural spirit of the Internet by seeking to determine the minimum func-tionality that is both necessary and appropriate in the network. NetSam is not an Internet architecture, but merely a framework for new services pivoting on network assistance, which may become part of the future architecture.Approach The study will be carried out in the context of three important applications: Reliable Multicast, Distributed Denial of Service, and Network Management. The investigation will follow a disciplined, minimalist approach, assuming that a service is not needed unless proven otherwise. Selected services will be decom-posed and their components distributed between the network and the application. Network components willbe simple and general so they can be easily implemented in the routers with minimal security risks. The NetSam architecture defines a new architectural division of services, namely filter and surrogateservices. Filter services are very simple and typically implemented in the routers, while surrogate servicesare more complex and typically implemented at the edges (but use some help from forwarding filters).Together, filters and surrogates provide flexibility and support a large spectrum of services. The study will follow a top-down approach by isolating the applications of network assistance. Simpleand general services will be defined, with candidates including packet marking, steering and sampling andthen appropriate filters will be designed. The resulting system will be evaluated through implementation andsimulation.Impact on Advancing Knowledge This research proposes a new paradigm for application/network interaction. Unlike current paradigmsthat follow either complete separation or union of the two, this research proposes informed interactionbetween the network and application. The major contribution of this research to science will be the architecturethat governs this interaction.Impact on Education This research will expose students to both theoretical and practical issues on application/network interaction. Students will be challenged to think deeper about the distinction between the application and the network, with emphasis on understanding concepts like the end-to-end argument and active networking.Students will learn to analyze application requirements and consider the merits and demerits of router-assisted services. Students will learn how to define a new architecture. Project work will task students with the definition of new services and the decomposition and implementation of their constituent primitives.

端到端的论点是互联网架构的基本原则。然而，互联网的商业化带来了新的需求，如信任，QoS，ISP差异化，第三方参与和不成熟的用户。这些要求促使人们在寻求新的互联网架构时重新思考端到端原则。过去的经验表明，新架构的开发可能是一个漫长的过程，充满了争论，并将从一个巨大的，往往是未知的解决方案空间中汲取经验。 本研究将调查的解决方案空间的一部分，即NetworkAssisted Services作为未来互联网架构的一个可能的组成部分的可行性和适用性。一个网络援助体系结构称为网络撒玛利亚人（NetSam）的定义映射的框架，这样的服务。NetSam的动机是观察到许多新的需求似乎需要网络中的新机制。 与主动网络不同，NetSam是一个温和但谨慎的增强网络，它提供了一系列超越基本转发的服务，但在精神上与AN的可延展网络相距甚远。NetSam通过寻求确定网络中必要和适当的最小功能性来保持互联网的架构精神。NetSam不是一个互联网架构，而仅仅是一个基于网络辅助的新服务框架，它可能成为未来架构的一部分。方法 这项研究将在三个重要的应用程序的背景下进行：可靠组播，分布式拒绝服务，和网络管理。调查将遵循一种有纪律的、最低限度的方法，除非有相反的证明，否则假设不需要某项服务。选定的服务将被分解，其组件分布在网络和应用程序之间。网络组件将是简单和通用的，因此它们可以很容易地在路由器中实现，并具有最小的安全风险。 NetSam体系结构定义了一个新的服务体系结构划分，即过滤器和代理服务。过滤服务非常简单，通常在路由器中实现，而代理服务则更复杂，通常在边缘实现（但需要转发过滤器的帮助）。过滤器和代理一起提供灵活性并支持大量服务。 这项研究将采取自上而下的方法，将网络援助的应用分开。将定义简单和通用服务，候选服务包括数据包标记、引导和采样，然后将设计适当的过滤器。将通过实施和模拟来评估由此产生的系统。 本研究提出了一种新的应用程序/网络交互的范例。不像目前的范式，遵循要么完全分离或两者的结合，本研究提出了网络和应用程序之间的知情interactionation。这项研究对科学的主要贡献将是管理这种相互作用的架构。对教育的影响 这项研究将使学生接触到应用程序/网络交互的理论和实践问题。学生将面临的挑战是深入思考应用程序和网络之间的区别，重点是理解端到端的论点和主动联网等概念。学生将学习分析应用程序的要求，并考虑路由器辅助服务的优缺点。学生将学习如何定义一个新的架构。项目工作将要求学生定义新服务，并分解和实现其组成原语。