• Title, Summary, Keyword: Mobile Database

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The Design of the Selection and Alignment Queries Using Mobile Program (J2ME) for Database Query Optimization

  • Min, Cheon-Hong;Kumar, Prasanna
    • 한국경영정보학회:학술대회논문집
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    • pp.620-627
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    • 2008
  • In this paper, recognizing the importance of the database query optimization design methods, we implemented mobile database with mobile program (J2ME) which is a useful database procedures. In doing so, we emphasize the logical query optimization which brings mobile database to performance improvement. The research implies that the suggested mobile program (J2ME) would contribute to the realization of the efficient mobile database as the related technology develops in the future.

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The Design of the Selection and Alignment Queries Using Mobile Program (J2ME) for Database Query Optimization

  • Ko, Wan-Suk;Min, Cheon-Hong
    • 한국디지털정책학회:학술대회논문집
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    • pp.263-273
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    • 2003
  • Recognizing the importance of the database query optimization design methods, we implemented mobile database with mobile program (J2ME) which is a useful database procedures. In doing so, we emphasize the logical query optimization which brings mobile database to performance improvement. The research implies that the suggested mobile program (J2ME) would contribute to the realization of the efficient mobile database as the related technology develops in the future.

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A Performance Estimation Simulation of Grouping Method for Performance Elevation under Mobile Database Environment (모바일 데이터베이스 환경하에서의 성능 향상을 위한 군집화 기법의 성능 평가 시뮬레이션)

  • 신성욱;정동원;백두권
    • Journal of the Korea Society for Simulation
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    • v.12 no.2
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    • pp.55-62
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    • 2003
  • The explosive Increase of wireless networks and the advancement of mobile devices lead to the expansion of mobile environment. In accordance with the development of mobile environment, the need to use mobile database is increased sharply, and also it accompanies the related problems. The current mobile database system is based on the centralized method from which a synchronized server manages multiple mobile database management system to synchronize. From this mobile system architecture, several kinds of problems can be detected such as the management of synchronization issues between mobile databases and the transaction management issues. Furthermore, the current mobile database management system does not consider any solution on the fault tolerance. To solve those problems, this paper proposes the mobile agent-based mobile database management system. The proposed system provide high confidence and efficiency by enhancing the network efficiency and fault tolerance through the mobile grouping.

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Implementation and Experiment for Search Performance Analysis of SQLite Mobile Database (SQLite 모바일 데이터베이스의 검색 성능 분석을 위한 구현 및 실험)

  • Choi, Jin-oh
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.21 no.2
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    • pp.333-338
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    • 2017
  • Recently, because of the mobile device generalization tendency, a lot of new mobile applications which need mobile database on mobile devices appear. SQLite, Realm, etc. are representative mobile databases, and they are the database engines which are suitable for small devices that have large resource restriction and are used a lot in mobile devices based on Linux. These engines are open source programs and have advantages which are lighter weight and faster speed than general purpose databases. This paper focuses on the performance experiments and analysis of SQLite, which is front runner in mobile database fields. Considering the target mobile environments, the test is performed at Linux environment. And this paper implements performance test program and performs performance experiment of SQLite database to test search efficiency. The experiment is processed by comparison with the results of a Oracle database working out at the same environment.

Mobile database server management system (모바일 데이트베이스 서버 관리 시스템)

  • Zheng, Bao-Wei;Park, Sang-Gug
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.645-648
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    • 2007
  • This paper describes database server management system by mobile device. Our system can control database server immediately in any where by mobile device. We have developed the dataset server CE which interface with mobile device, database management system which rons in mobile device and web services which connect the mobile database with desktop database. External mobile device communicate with web service agent via wireless equipment. Our system includes dataset server CE client engine, web service server agent and mobile device management system. Through the test by an application program, we have confirmed that our system operates very well each others.

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Transaction Processing Scheme for Mobile Database Systems (이동 데이터베이스체계를 위한 거래처리 기법)

  • 최용구
    • Journal of the Korea Society of Computer and Information
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    • v.3 no.4
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    • pp.19-26
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    • 1998
  • Mobile database system address information processing based on database system in mobile computing environment. In the mobile database system, when a mobile transaction host enter a other radio coverage area called a cell while processing a transaction, it have to alter the communication network address to new database server. This is called transactional service handoff. This paper propose a transaction processing scheme for providing the proper function of this transactional service handoffs in mobile database system. This scheme apply coordinator migration mechanism which perform the transaction in new database server when posed to be the transaction service handoff. Fially, the proposed scheme will improve system performance by minimizing the tansmission of message for processing the transactions in mobile database system.

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Implementation of Mobile Cliented-Server System for Real-Time Processing (실시간 처리 기반의 모바일 클라이언트-서버 시스템 구현)

  • Joo, Hae-Jong;Hong, Bong-Wha
    • The Journal of Information Technology
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    • v.9 no.4
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    • pp.35-47
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    • 2006
  • Many researches are going on with regard to issues and problems related to mobile database systems, which are caused by the weak connectivity of wireless networks, the mobility and the portability of mobile clients. Mobile computing satisfies user's demands for convenience and performance to use information at any time and in any place, but it has many problems to be solved in the aspect of data management. The purpose of our study is to Implement Real-Time Mobile Query Processing System(MQPS) to solve problems related to database hoarding, the maintenance of shared dataconsistency and the optimization of logging, which are caused by the weak connectivity and disconnection of wireless networks inherent in mobile database systems under mobile client server environments. In addition, we proved the superiority of the proposed MQPS by comparing its performance to the C I S(Client-Intercept-Srever) model.

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Design of Reliable Query Processing System in Mobile Database Environments (모바일 데이터베이스 환경의 신뢰성 보장 질의처리 시스템 설계)

  • Joo, Hae-Jong;Park, Young-Bae
    • The KIPS Transactions:PartD
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    • v.12D no.4
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    • pp.521-530
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    • 2005
  • Many researches are going on with regard to issues and problems related to mobile database systems, which are caused by the weak connectivity of wireless networks, the mobility and the Portability of mobile clients. Mobile computing satisfies user's demands for convenience and Performance to use information at any time and in any Place, but it has many Problems to be solved in the aspect of data management. The purpose of our study is to design Mobile Query Processing System(MQPS) to solve problems related to database hoarding, the maintenance of shared data consistency and the optimization of logging, which are caused by the weak connectivity and disconnection of wireless networks inherent in mobile database systems under mobile client-server environments. In addition, we proved the superiority of the proposed MQPS by comparing its performance to the C-I-S(Client-Intercept- Server) model.

Proxync : A Framework for Proxy-based Mobile Database with SyncML

  • Park, Dong M.;Eenjun Hwang
    • Proceedings of the Korea Inteligent Information System Society Conference
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    • pp.186-191
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    • 2001
  • Mobile agent technologies are getting popular as means for accessing network resources efficiently. In order for mobile agents to be accepted as a reliable technology for applications such as e-commerce, a proper framework for mobile database should be established. In this paper, we first discuss weak points of current mobile computing systems that mostly result from the limitations of current mobile computing technology including frequent disconnection, limited battery capacity, low-bandwidth communication and reduced storage capacity. These weak points also have become the cause of transaction problem where mobile devices issue transactions. In order to eliminate this transaction problem in the mobile environment, we propose a mobile database framework, Proxyne, which is based on the proxy and SyncML.

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The Integration of Mobile GIS and Spatio-temporal Database for Evaluating Space-time Accessibility of an Individual: An Approach Based on Time Geography Model

  • Lee Yang-Won;Shibasaki Ryosuke
    • Proceedings of the KSRS Conference
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    • pp.753-758
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    • 2005
  • This study attempts at building an integrated GIS computing framework for evaluating space-time accessibility of an individual with the approach of time geography model. The proposed method is based on the integration of mobile GIS and object-relational spatio-temporal database. Three components are central to our system: ( i ) mobile GIS application that transmits spatio-temporal trajectory data of an individual; ( ii ) spatio-temporal database server that incorporates the time geography model; and (iii) geovisualization client that provides time geographic queries to the spatio-temporal database. As for the mobile GIS application, spatio-temporal trajectory data collected by GPS-PDA client is automatically transmitted to the database server through mobile data management middleware. The spatio-temporal database server implemented by extending a generic DBMS provides spatio-temporal objects, functions and query languages. The geovisualization client illustrates 3D visual results of the queries about space-time path. space-time prism and space-time accessibility. This study shows a method of integrating mobile GIS and DBMS for time geography application, and presents an appropriate spatio-temporal data model for evaluating space-time accessibility of an individual.

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