Integrated Multicast for Ad Hoc Networks (IMAHN-NSF)

Ad Hoc 网络的集成组播 (IMAHN-NSF)

• 批准号: 9813724
• 负责人: Katia Obraczka
• 金额: $ 72.07万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-10-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813724&HistoricalAwards=false
• 关键词: Integrated; Multicast; Ad; Hoc; Networks

This proposal will investigate, design and deploy a suite of novelmulticast protocols aimed primarily at ad hoc networks. The investigatorsmaintain that, due to the inherent broadcast capability, wireless networksare well suited for multicast communication. The contributions of theproposed suite of multicast packet routing and forwarding protocols (IMAHN)can be summarized as follows: (1) design, evaluation, prototyping anddeployment of a suite of multicast routing and packet forwarding protocolsfor ad hoc networks, and (2) development of an integrated multicastrouting solution for the mixed-media internetwork of the future; thisincludes investigation, evaluation, prototyping, and deployment ofmechanisms providing seamless multicast service.IMAHN will emphasize the following: (1) robustness vs efficiency: manyexisting multicast routing approaches rely on state in routers to keeptrack of multicast group members. This, coupled with the high volume ofrouting information exchanges and slow convergence, makes traditionalmulticast approaches untenable in highly dynamic ad hoc networks (AHNs)composed of anemic (low-power, low storage capacity) hosts. We propose anew technique, adaptive flooding, that stresses rapid and robust delivery.IMAHN will consist of a suite of adaptive protocols addressing a range ofAHNs and mobility patterns. In constantly changing AHNs, redundantbroadcasting may be appropriate, while, in less dynamic AHNs, a range ofmore bandwidth-efficient multicast protocols will be considered; (2)adaptability: hosts should be able to (and will) migrate freely among adhoc, fixed-infrastructure mobile, and traditional wired networks. In orderto function appropriately -- when faced with changes in the underlyinginfrastructure -- hosts need switch on-the-fly among multiple multicastmechanisms; (3) unlimited mobility: some existing solutions are gearedtowards discrete mobility where periods of movement are interspersed withperiods of rest. Others assume certain limits on direction, speed andnumber of simultaneously moving hosts. In contrast, we stress universal,unlimited mobility of all network components; (4) integrated multicast:multicast solutions for AHNs will most likely differ substantially fromthose for fixed networks (one of the main reasons is the marked differencein transmission rates). In order to offer seamless and integrated multicastservice for the mixed-media internetwork of the future, IMAHN will developnovel mechanisms for inter-operation of fixed and wireless multicastsolutions.

本提案将研究、设计和部署一套主要针对ad hoc网络的novelmulticast协议。 支持者认为，由于无线网络固有的广播能力，无线网络非常适合多播通信。 IMAHN协议的主要贡献在于：（1）设计、评估、开发和部署了一套适用于Ad Hoc网络的多播路由和转发协议;（2）为未来的混合媒体互联网络提供了一个集成的多播路由解决方案; IMAHN将重点讨论以下几个问题：（1）鲁棒性与效率：现有的许多组播路由方法依赖于路由器中的状态来跟踪组播组成员。这一点，再加上大量ofrouting信息交换和缓慢的收敛，使得traditional multicast方法站不住脚的高度动态的ad hoc网络（AHNs）组成的贫血（低功耗，低存储容量）的主机。我们提出了一种新的技术，自适应洪泛，强调快速和强大的delivery.IMAHN将包括一套自适应协议，解决了一系列的AHN和移动模式。在不断变化的AHN，redundantbroadcasting可能是适当的，而在较少的动态AHN，一系列ofmore带宽效率的多播协议将被考虑;（2）适应性：主机应该能够（并将）之间自由迁移adhoc，固定基础设施移动的，和传统的有线网络。 为了适当地发挥作用--当面对底层基础设施的变化时--主机需要在多个组播机制之间进行动态切换;（3）无限的移动性：一些现有的解决方案面向离散的移动性，其中移动期间穿插着休息期间。另一些则对同时移动的主机的方向、速度和数量有一定的限制。相反，我们强调所有网络组件的通用的、无限的移动性;（4）集成的多播：AHN的多播解决方案很可能与固定网络的多播解决方案有很大的不同（主要原因之一是传输速率的显著差异）。为了给未来的混合媒体互联网提供无缝的、综合的多播服务，IMAHN将开发新的机制来实现固定和无线多播解决方案的互操作。