Improved group-based cooperative caching scheme for mobile ad hoc networks

I. Wei Ting, Yeim Kuan Chang

研究成果: Article同行評審

28 引文 斯高帕斯(Scopus)

摘要

Data caching is a popular technique that improves data accessibility in wired or wireless networks. However, in mobile ad hoc networks, improvement in access latency and cache hit ratio may diminish because of the mobility and limited cache space of mobile hosts (MHs). In this paper, an improved cooperative caching scheme called group-based cooperative caching (GCC) is proposed to generalize and enhance the performance of most group-based caching schemes. GCC allows MHs and their neighbors to form a group, and exchange a bitmap data directory periodically used for proposed algorithms, such as the process of data discovery, and cache placement and replacement. The goal is to reduce the access latency of data requests and efficiently use available caching space among MH groups. Two optimization techniques are also developed for GCC to reduce computation and communication overheads. The first technique compresses the directories using an aggregate bitmap. The second employs multi-point relays to develop a forwarding node selection scheme to reduce the number of broadcast messages inside the group. Our simulation results show that the optimized GCC yields better results than existing cooperative caching schemes in terms of cache hit ratio, access latency, and average hop count.

原文English
頁(從 - 到)595-607
頁數13
期刊Journal of Parallel and Distributed Computing
73
發行號5
DOIs
出版狀態Published - 2013 5月

All Science Journal Classification (ASJC) codes

  • 軟體
  • 理論電腦科學
  • 硬體和架構
  • 電腦網路與通信
  • 人工智慧

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