Semantic broadcast scheme for a mobile environment based on dynamic chunking

Ken C K Lee, Hong Va Leong, Antonio Si

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

20 Citations (Scopus)


Data broadcast is an effective approach to disseminate information from a database server to numerous mobile clients in a mobile environment. Since a broadcast session contains only a subset of the database items, a client might not be able to obtain all its items from the broadcast and is forced to request additional ones from the server on demand. In this paper, we describe a semantic-based broadcast approach which attaches a semantic description to each broadcast unit, called chunk, which is a cluster of data items. This allows a client to determine if a query can be answered entirely using a broadcast as well as defining the precise nature of the remaining items in the form of a 'supplementary' query. Chunks could be of different sizes and are hierarchically organized. We propose a heuristic to schedule the broadcast order of the chunks to improve the tuning time, access time, and a new metric called data affinity index. The performances are evaluated via experiments based on a simulation model.
Original languageEnglish
Title of host publicationProceedings - International Conference on Distributed Computing Systems
Number of pages8
Publication statusPublished - 1 Jan 2000
Event20th International Conference on Distributed Computing Systems (ICDCS 2000) - Taipei, Taiwan
Duration: 10 Apr 200013 Apr 2000


Conference20th International Conference on Distributed Computing Systems (ICDCS 2000)

ASJC Scopus subject areas

  • Hardware and Architecture

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