Network Virtualization Mechanisms for Mobile Communication

移动通信网络虚拟化机制

• 批准号: 0240525
• 负责人: Jason Nieh
• 金额: $ 25万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0240525&HistoricalAwards=false
• 关键词: Network; Virtualization; Mechanisms; Mobile; Communication

This project focuses on creation and deployment of the new network virtualization mechanisms to support mobile communication and, in particular, efficient transparent migration of end-to-end live network connections without any changes to existing network protocols. To this aim, novel mobile communication architecture is proposed, called Virtual Network Address Translation (VNAT), which enables connection mobility for a spectrum of computation units, ranging from a single process to the entire host. Three key mechanisms are used to enable transparent live connection mobility: connection virtualization, connection translation, and connection migration. Connection virtualization virtualizes end-to-end transport connection identification by using virtual endpoints rather than physical endpoints (e.g., IP addresses and port numbers). As a result, connection identifications no longer depend on lower layer network endpoints and are no longer affected by the movement of network endpoints. Connection translation translates virtualized connection identifications into physical connection identifications to be carried on the physical network. As connections migrate across the network, their virtual identifications never change. Instead, they are mapped into appropriate physical identifications according to the endpoints' attachment to the physical network. Finally, VNAT connection migration keeps states and uses protocols to automate tasks for connection migration such as keeping connection alive, establishing a security key, locating migrated end-point (s), and updating virtual-physical endpoints mappings. In this project, the VNAT architecture is implemented and is fully compatible with, and does not require any modifications to, existing networking protocols, operating systems, or applications. The results of this research will have a fundamental scientific impact by providing crucial networking mechanisms for future innovations in mobile networking research.

该项目的重点是创建和部署新的网络虚拟化机制，以支持移动通信，特别是在不更改现有网络协议的情况下实现端到端实时网络连接的高效透明迁移。为此，提出了一种称为虚拟网络地址转换（VNAT）的新型移动通信架构，它支持一系列计算单元（从单个进程到整个主机）的连接移动性。使用三个关键机制来实现透明的实时连接移动性：连接虚拟化、连接转换和连接迁移。连接虚拟化通过使用虚拟端点而不是物理端点（例如，IP 地址和端口号）来虚拟化端到端传输连接标识。因此，连接标识不再依赖于下层网络端点，也不再受网络端点移动的影响。连接转换将虚拟化连接标识转换为物理网络上承载的物理连接标识。当连接在网络上迁移时，它们的虚拟标识永远不会改变。相反，它们根据端点与物理网络的连接被映射到适当的物理标识。最后，VNAT 连接迁移保留状态并使用协议自动执行连接迁移任务，例如保持连接活动、建立安全密钥、定位迁移的端点以及更新虚拟-物理端点映射。在此项目中，VNAT架构已实现，并且与现有网络协议、操作系统或应用程序完全兼容，并且不需要对其进行任何修改。这项研究的结果将为移动网络研究的未来创新提供关键的网络机制，从而产生根本性的科学影响。