| 移动环境中基于有效期的语义缓存查询处理 |
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| 引用本文： | 熊婵,杨进才,张遴. 移动环境中基于有效期的语义缓存查询处理[J]. 微电子学与计算机, 2006, 23(Z1): 234-235 |
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| 作者姓名： | 熊婵 杨进才 张遴 |
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| 作者单位： | 华中师范大学,计算机科学系,湖北,武汉,430079 |
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| 摘 要： | 在移动计算环境中,移动主机与服务器连接状态的多变性,限制了移动主机的查询处理。在移动主机中对查询数据进行语义缓存,将提高移动主机对服务器资源的利用效率以及可用性。文章在语义缓存的基础上引入了有效期,在查询导出的精确匹配、包含匹配和相交匹配基础上,给出了查询结果有效性的充分条件,从而保证查询结果的有效。
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| 关 键 词： | 移动数据库 查询处理 语义缓存 有效期 |
| 文章编号： | 1000-7180(2006)S0-0234-02 |
| 修稿时间： | 2006-04-25 |
Query of Semantic Cache Based on the Period of Validity in a Mobile Environment |
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| XIONG Chan,YANG Jin-cai,ZHANG Lin. Query of Semantic Cache Based on the Period of Validity in a Mobile Environment[J]. Microelectronics & Computer, 2006, 23(Z1): 234-235 |
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| Authors: | XIONG Chan YANG Jin-cai ZHANG Lin |
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| Abstract: | The query processing is limited because of the fantasticality of linking status between the mobile computer and servers in a mobile environment. The resource of servers always is visited by mobile computer. Therefore, the efficiency and availability will be improved when querying data from semantic cache in mobile computer. This paper provides a sufficient condition to ensure the validity of the query results by combining the period of validity and semantic cache. It is based on the exact match, containing match and overlap match. |
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| Keywords: | Mobile database Query processing Semantic cache Period of validity |
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