Strategies for Query Processing in Mobile Computing
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چکیده
In this paper, we discuss several strategies for e cient processing of three types of queries concerning mobile hosts; (1) queries to obtain the location of a mobile host (location queries), (2) queries to determine whether the mobile host is currently active (existence queries), and (3) queries to obtain a piece of information from a mobile host (data queries). Extracting ve fundamental strategies from those usually employed in mobile communication protocols, we shall discuss their features and then compare their performance. These ve strategies are: single broadcast noti cation (SBN), double broadcast noti cation (WBN), broadcast query forwarding (BQF), single default noti cation (SDN), and double default noti cation (WDN). We show that the optimal strategy varies according to network conditions such as network topology, network scale, migration rate, and query occurrence rate. In Mobile Computing, T. Imielinski and H. F. Korth eds., Kluwer Academic Publishers, 1996
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تاریخ انتشار 1996