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Improving on-demand data access efficiency in MANETs with cooperative caching.

机译：通过协作缓存提高MANET中的按需数据访问效率。

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摘要

Mobile Ad Hoc Networks (MANETs) provide an attractive solution for networking in the situations where network infrastructure or service subscription is not available. Its usage can further be extended by enabling communications with external networks such as Internet or cellular networks through gateways. However, data access applications in MANETs suffer from dynamic network connections and restricted energy supplies. While most of the research focuses on Media Access Control (MAC) and routing layer solutions, we address these problems by application level cooperation which utilizes the locality principle and commonality in users' interests.; In this dissertation, we explore how to use cooperative caching to improve data access efficiency in MANETs. We devised COOP, a novel cooperative caching scheme for on-demand data access applications in MANETs. The objective is to improve data availability and access efficiency by collaborating local resources of mobile nodes. COOP addresses two basic problems of cooperative caching: cache resolution and cache management, i.e. how to find requested data efficiently and how to manage an individual cache to improve the overall capacity of cooperated caches. To improve data availability and access efficiency, COOP discovers data sources which induce less communication cost by utilizing cooperation zones, historical profiles, and hop-by-hop resolution. For cache management, COOP increases the effective capacity of cooperative caches by minimizing caching duplications within the cooperation zone and accommodating more data varieties. The performance of COOP is studied using mathematical analysis and simulations from the perspectives of data availability, time efficiency, and energy efficiency. The analysis and simulation results show that this scheme significantly reduces response delay and improves data availability with proper settings of the cooperation zone radius.
机译：移动自组织网络（MANET）在网络基础结构或服务订阅不可用的情况下为联网提供了一种有吸引力的解决方案。通过允许通过网关与外部网络（例如Internet或蜂窝网络）进行通信，可以进一步扩展其用途。但是，MANET中的数据访问应用程序受到动态网络连接和能源供应受限的困扰。虽然大多数研究都集中在媒体访问控制（MAC）和路由层解决方案上，但我们通过应用级合作解决了这些问题，该合作利用了本地性原则和通用性来满足用户的利益。本文探讨了如何利用协同缓存提高移动自组网中的数据访问效率。我们设计了COOP，这是一种用于MANET中按需数据访问应用程序的新颖的协作式缓存方案。目的是通过协作移动节点的本地资源来提高数据可用性和访问效率。 COOP解决了协作式缓存的两个基本问题：缓存解析和缓存管理，即如何有效查找请求的数据以及如何管理单个缓存以提高协作式缓存的整体容量。为了提高数据可用性和访问效率，COOP通过利用合作区域，历史档案和逐跳分辨率来发现可降低通信成本的数据源。对于缓存管理，COOP通过最大程度地减少协作区域内的缓存重复并容纳更多数据种类来提高协作缓存的有效容量。从数据可用性，时间效率和能源效率的角度，使用数学分析和模拟研究了COOP的性能。分析和仿真结果表明，通过适当设置协作区半径，该方案可显着减少响应延迟并提高数据可用性。

著录项

  • 作者

    Du, Yu.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 125 p.
  • 总页数 125
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自动化技术、计算机技术;
  • 关键词

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