Fault Tolerance Analysis of Mobile Systems

移动系统的容错分析

• 批准号: 9633444
• 负责人: Teresa Dahlberg
• 金额: $ 1.8万
• 依托单位: University of North Carolina at Charlotte
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633444&HistoricalAwards=false
• 关键词: Fault; Tolerance; Analysis; Mobile; Systems

Deployment of wireless, mobile networks is rapidly increasing as advances in digital cellular systems promise large-scale, reliable voice, data, and multimedia communications in a mobile environment. The realization of Personal Communications Services (PCS) will increase dependence on mobile networks by the mass public and private sectors, implying that system failure resulting in loss of communication or critical data will not be tolerated. Fault tolerance analysis provides an understanding of system functionality in the wake of failures. Fault tolerance analysis such as the reliability, availability, and survivability problems continues to be well researched for wired networks. The mobility of the user along with the unpredictability of motion indicate that models and assumptions for wired networks cannot be carried over to the wireless, mobile domain. Very little focus has yet been placed on fault tolerance analysis for mobile networks in particular. This project fills this void through exploratory research on fault tolerance analysis of systems which provide large-scale PCS, including voice, data and multimedia communications. These systems are comprised of radio frequency communications within mobile cellular or picocellular networks that are interconnected to the existing (wired) infrastructure. The fault tolerance criteria and evaluation approach are not immediately apparent for these systems due to the heterogeneity of the services provided and of the underlying interconnection network, and due to the inherent unreliability of the wireless communications medium. The goal of this project is to formulate the appropriate research problems regarding fault tolerance of mobile systems and to indicate an analysis strategy. This includes identifying fault tolerance parameters (or propose new ones) which are most useful to measuring system robustness, developing a network modeling approach (or set of approaches), and proposing preliminary fault tolerance algor ithms using these models.

随着数字蜂窝系统的进步承诺在移动的环境中进行大规模、可靠的语音、数据和多媒体通信，无线、移动的网络的部署正在迅速增加。 个人通信服务的实现将增加大众公共和私营部门对移动的网络的依赖，这意味着将不能容忍系统故障导致通信或关键数据丢失。 容错分析提供了在故障之后对系统功能的理解。 容错分析，如可靠性，可用性和生存性问题继续很好地研究有线网络。 用户的移动性沿着运动的不可预测性表明，有线网络的模型和假设不能被带到无线的、移动的域。 特别是移动的网络的容错分析还没有得到很大的关注。 本计画透过探讨性研究提供大规模个人通讯系统（包括语音、数据及多媒体通讯）之容错分析，填补此一空白。 这些系统包括与现有（有线）基础设施互连的移动的蜂窝或微微蜂窝网络内的射频通信。 由于所提供的服务和底层互连网络的异质性，以及由于无线通信介质固有的不可靠性，这些系统的容错标准和评估方法不是立即显而易见的。 本计画的目标是针对移动的系统的容错性提出适当的研究问题，并指出分析策略。 这包括确定容错参数（或提出新的），这是最有用的测量系统的鲁棒性，开发网络建模方法（或方法集），并提出初步的容错算法使用这些模型。