National Tsing Hua University Institutional Repository:Adaptive access method for broadcast data under an error-prone mobile environment
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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 資訊工程學系 > 期刊論文 >  Adaptive access method for broadcast data under an error-prone mobile environment


    题名: Adaptive access method for broadcast data under an error-prone mobile environment
    作者: Lo, Shou-Chih;Chen, Arbee L. P.
    教師: 陳良弼
    日期: 2000
    出版者: Institute of Electrical and Electronics Engineers
    關聯: Knowledge and Data Engineering,IEEE Transactions,Volume 12,Issue 4,July-Aug. 2000,Page(s) 609 - 620
    关键词: Mobile computing
    Data communication systems
    Error correction
    Information technology
    Information retrieval systems
    Fault tolerant computer systems
    摘要: A ubiquitous information environment can be achieved by the mobile computing technologies. In this environment, users carrying their portable computers can retrieve local or remote information anywhere and at anytime. Data broadcast, with its advantages, has become a powerful means to disseminate data in wireless communications. Indexing methods for the broadcast data have been proposed to speedup access time and reduce power consumption. However, the influence of access failures has not been discussed. For the error-prone mobile environment, the occurrence of access failures is often due to disconnections, handoffs, and communication noises. In this paper, based on the distributed indexing scheme, we propose an adaptive access method which tolerates the access failures. The basic idea is to use index replication to recover from the access failures. One mechanism, named search range, is provided to dynamically record the range where the desired data item may exist. According to the search range, an unfinished search can be efficiently resumed by finding an available index replicate. A performance analysis is given to show the benefits of the method. Also, the concept of version bits is applied to deal with the updates of the broadcast data.
    显示于类别:[資訊工程學系] 期刊論文


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