A content-centric framework for effective data dissemination in opportunistic networks

Ling Jyh Chen, Chen Hung Yu, Cheng Long Tseng, Hao Hua Chu, Cheng Fu Chou

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

In this paper, we address the challenges of content transfer in opportunistic networks, and propose techniques to better facilitate data dissemination based on the characteristics of the content. To investigate this problem from its origins, we propose three message scheduling algorithms: Sequential Forwarding (SF), Full Interleaving (FI), and Block-based Interleaving (BI). Each algorithm is embedded in a specially tailored data dissemination technique to evaluate the benefits of applying it to different types of content and data dissemination methods. Three types of content (file, video and web) are considered and evaluated, and the dissemination methods considered are Layered Multiple Description Coding (LMDC) based and file-based. Using simulations as well as both synthetic and realistic network scenarios, we evaluate the proposed schemes in terms of latency and user perceived quality, and demonstrate how the schemes can achieve much better latency performance for file transfers. Furthermore, we show that using LMDC-based techniques leads to higher user perceived quality, since the end user is allowed to "preview" video file or web content, even before the data has been completely transferred. The effectiveness and robustness of our message scheduling algorithms and their corresponding content dissemination techniques make them ideal solutions that can go a long way toward effective data dissemination in opportunistic networks.

Original languageEnglish
Article number4530733
Pages (from-to)761-772
Number of pages12
JournalIEEE Journal on Selected Areas in Communications
Volume26
Issue number5
DOIs
Publication statusPublished - 2008 Jun 1

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Keywords

  • Delay/disruption tolerant networks
  • Layered coding
  • Multiple description coding
  • Opportunistic networks
  • Routing

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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