Control Theory and Informatics www.iiste.org ISSN 2224-5774 (print) ISSN 2225-0492 (online) Vol 1, No.1, 2011 10 | Page www.iiste.org Location Based Spatial Query Processing In Wireless System Sunny R. Panjwani Dept of Computer Engineering, D. Y. Patil College of Engineering,Akurdi Pune 411 035, India Email: sunnypanjwani7@gmail.com Aarti S.Gaikwad Dept of Computer Engineering, D. Y. Patil College of Engineering,Akurdi Pune 411 035, India Email: arati.g@rediffmail.com Abstract Location-based spatial queries (LBSQs) refer to spatial queries whose answers rely on the location of the inquirer. Efficient processing of LBSQs is of critical importance with the ever-increasing deployment and use of mobile technologies. Input of the system will be the radius of the region the center of which is the user current location and the type of entity such as bank, malls etc. Output will consist of the user requested entities ranked in the increasing distance. Our database will consist of all the entities with their type and geographic location. Our algorithm will find out all the locations within the specified region intended by the user. All these points will be used for firing the query along with the entity type to obtain a result set. Real time response due to the mobile nature of the user and the accuracy are considerable issues to be taken care of. Furthermore the air as media presents the issues for the abnormal connection loss and errors Keywords: Spatial query, GPS. 1 Introduction In this paper, we present a project that would provide a java mobile application that is used in GPS supported mobiles phones. Authenticated user login into this application can search information about any place in a given particular range. Places like IT industries, Hospitals, Banks, ATM’s, Monument, and Government Offices etc. can be searched by user in this project we are using mobile as a client user interface. Our project is consisted in 3-tier architecture and in MVC-2 format. User interface in mobile is constructed with the LWUIT. Spatial query is used to retrieve information from database. Authenticated user will enter the range up to which he wants to search the places and according to this query will fire on the database and the response will be obtained. 2. Theoretical Background 2.1 GPS GPS is a system for location identifier. This system is being developed by the US DEPARTMENT OF DEFENCE and is free to be used by anyone who has a GPS device. The system uses a collection of 24 satellites. For identifying the location precisely at least the device should be in the range of three satellites. GPS can provide the location accuracy of up to centimeter degree of accuracy. 2.2 Spatial query SPATIAL query processing is becoming an integral part of many new mobile applications. Recently, there has been a growing interest in the use of location-based spatial queries (LBSQs), which represent a set of spatial queries that retrieve information based on mobile users’ current locations. User mobility and data exchange through wireless communication give LBSQs some unique characteristics. In our system spatial query will be used for firing the query to the database for the response of the entities in the region of user. Mobile Query Semantics In a mobile environment, a typical LBSQ is of the following form: “find the top-three nearest hospitals.” The result of the query depends on the location of its requester. The query from the user consists of the co- ordinates of the user along with the radius of region and the type of entity. High Workload