Monitoring Continuous Location Queries Using Mobile Agents
Monitoring Continuous Location Queries Using Mobile Agents
复制标题
使用移动代理监控连续位置查询
DOI：
10.1007/3-540-45710-0_9
复制
发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Illarramendi
中科院分区：
文献类型：
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作者：
Sergio Ilarri;E. Mena;A. Illarramendi
如今，移动终端用户数量不断增加。然而，这些用户的可用数据服务是罕见的，通常提供一个低效的性能。更具体地说，越来越多的兴趣是围绕基于位置的服务，但位置相关的查询的处理仍然是在新的移动的计算环境中的研究课题。由于所涉对象的流动性，在考虑是否需要随时更新对这些查询的答复时，出现了特殊的困难。在本文中，我们介绍了一种新的方法来处理位置相关的查询，提出了以下特点：1）它处理发出查询的用户以及在这样的查询中涉及的对象可以改变其位置的场景，2）它处理连续查询，因此答案以一定的频率更新，3）它提供完全分散的解决方案，以及4）它通过使用移动的代理来优化无线通信成本。我们专注于向用户呈现的数据必须刷新的方式，以显示最新的答案，但优化通信工作。
Nowadays the number of mobile device users is continuously increasing. However the available data services for those users are rare and usually provide an inefficient performance. More particularly, a growing interest is arising around location-based services but the processing of location-dependent queries is still a subject of research in the new mobile computing environment. Special difficulties arise when considering the need of keeping the answer to these queries up-to-date, due to the mobility of involved objects. In this paper we introduce a new approach for processing location-dependent queries that presents the following features: 1) it deals with scenarios where users issuing queries as well as objects involved in such queriescan change their location, 2) it deals with continuous queries and so answers are updated with a certain frequency, 3) it provides a completely decentralised solution and 4) it optimises wireless communication costs by using mobile agents. We focus on the way in which data presented to the user must be refreshed in order to show an up-to-date answer but optimising communications effort.