On-Demand Broadcasting for Healthcare Services using Time-Parameterized Replacing Policy

Im, Seokjin The Institute of Internet 2020 International journal of advanced smart convergenc Vol.9 No.2

The interest and importance of the convergence services for healthcare expand more and more as the average life expectancy increases. Convergence of ICT and healthcare technology unfold efficient and quick health services. Recently, healthcare services provide to clients with apps over web. On-demand wireless data broadcast supports any number of clients to access their desired data items dynamically by responding the needs for data items from the clients. In this paper, we propose an on-demand system to broadcast FHIR bundles for efficient healthcare services. We use time-parameterized replacing policy for renewing the bundle items on the wireless broadcast channel. The policy lets the on-demand broadcasting dynamic by controlling the time duration for the bundles to reside over the wireless channel. With simulation studies using an implemented testbed, we evaluate the performances of the proposed system in access time and tuning time. For evaluation, we compare the time-parameterized replacing policy of the proposed system with regular-number replacing policy. The proposed time-parameterized replacing policy shows shorter access time than the regular-number replacing policy because the policy responds more actively and dynamically to the change of the needs of the clients for FHIR bundles.

Efficient Window Query Processing with a Multi-Level Grid-based Air Indexing Scheme on Air

Seokjin Im(임석진),JinTak Choi(최진탁) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.9

Air indexing schemes of spatial data items have been researched for effective processing of spatial queries. However, the schemes cause the mobile clients to wait long for their desired items and to consume excessive energy. In this paper, we propose Multi-level Grid-based Air Index (MGAI) in order to efficiently process window query on air. MGAI allows the clients to process window query quickly and with less energy consumption than the existing schemes by reducing data items to filter out. Also, it has a linear structure matching the linear access pattern of the clients. The simulations show that the proposed MGAI outperforms the existing schemes in terms of access latency and energy efficiency.

On-Demand Broadcasting for Healthcare Services using Time-Parameterized Replacing Policy

Seokjin Im 한국인터넷방송통신학회 2020 Journal of Advanced Smart Convergence Vol.9 No.2

The interest and importance of the convergence services for healthcare expand more and more as the average life expectancy increases. Convergence of ICT and healthcare technology unfold efficient and quick health services. Recently, healthcare services provide to clients with apps over web. On-demand wireless data broadcast supports any number of clients to access their desired data items dynamically by responding the needs for data items from the clients. In this paper, we propose an on-demand system to broadcast FHIR bundles for efficient healthcare services. We use time-parameterized replacing policy for renewing the bundle items on the wireless broadcast channel. The policy lets the on-demand broadcasting dynamic by controlling the time duration for the bundles to reside over the wireless channel. With simulation studies using an implemented testbed, we evaluate the performances of the proposed system in access time and tuning time. For evaluation, we compare the time-parameterized replacing policy of the proposed system with regular-number replacing policy. The proposed time-parameterized replacing policy shows shorter access time than the regular-number replacing policy because the policy responds more actively and dynamically to the change of the needs of the clients for FHIR bundles.

Design and Implementation of a Simulation Framework for Wireless Data Broadcasting based on Data ID Space Partition

Im, Seokjin The Institute of Internet 2018 Journal of Advanced Smart Convergence Vol.7 No.4

For the information services supporting requests of data items from a great number of mobile clients, wireless data broadcasting is an effective way because it can accommodate any number of clients. In the wireless data broadcasting, various air indexing schemes and data scheduling schemes have been developed in order to enable the clients to access their desired data items efficiently. The broadcasting system needs a method to simulate newly designed air indexing and scheduling schemes of the system, and to evaluate the performance parameters of the schemes. In this paper, we design an expandable and efficient simulation framework for the wireless data broadcasting based on the partition of data ID space. The framework can adopt regular and irregular space partition and evaluate various performance parameters of the broadcasting system. We implement a testbed of the broadcasting system using the framework, that adopts IIP, GDI and EXP as its air indexing schemes. We simulate the system using the testbed and evaluate the performance parameters of the system. Thus, we show the efficiency and expandability of the designed and implemented framework.

Mathematical Performance Model of Two-Tier Indexing Scheme in Wireless Data Broadcasting

Seokjin Im 국제문화기술진흥원 2018 International Journal of Advanced Culture Technolo Vol.6 No.4

Wireless data broadcasting system that can support any number of clients is the effective alternative for the challenge of scalability in ubiquitous computing in IoT environment. In the system, it is important to evaluate quickly the performance parameter, the access time that means how quickly the client access desired data items. In this paper, we derive the mathematical model for the access time in the wireless data broadcast system adopting two-tier indexing scheme. The derived model enables to evaluate the access time without the complicated simulation. In order to evaluate the model, we compare the access time by the model with the access time by the simulation.

Design and Implementation of a Simulation Framework for Wireless Data Broadcasting based on Data ID Space Partition

Seokjin Im 한국인터넷방송통신학회 2018 Journal of Advanced Smart Convergence Vol.7 No.4

For the information services supporting requests of data items from a great number of mobile clients, wireless data broadcasting is an effective way because it can accommodate any number of clients. In the wireless data broadcasting, various air indexing schemes and data scheduling schemes have been developed in order to enable the clients to access their desired data items efficiently. The broadcasting system needs a method to simulate newly designed air indexing and scheduling schemes of the system, and to evaluate the performance parameters of the schemes. In this paper, we design an expandable and efficient simulation framework for the wireless data broadcasting based on the partition of data ID space. The framework can adopt regular and irregular space partition and evaluate various performance parameters of the broadcasting system. We implement a testbed of the broadcasting system using the framework, that adopts IIP, GDI and EXP as its air indexing schemes. We simulate the system using the testbed and evaluate the performance parameters of the system. Thus, we show the efficiency and expandability of the designed and implemented framework.

A Two-Tier Spatial Index for Non-flat Spatial Data Broadcasting on Air

IM, SeokJin,HWANG, HeeJoung 'Institute of Electronics, Information and Communi 2014 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.97 No.12

Energy-Efficient Data Access Using Spatial Index in the Wireless Data Broadcast for Location-Dependent Healthcare Services

Seokjin Im,,Habin Im,,Hwang, HeeJoung American Scientific Publishers 2018 Journal of medical imaging and health informatics Vol.8 No.4

Design and Implement of a Framework for a Hybrid Broadcast System using Voronoi Diagram for NN Search

Seokjin Im 한국인터넷방송통신학회 2023 International Journal of Internet, Broadcasting an Vol.15 No.2

The portable mobile devices with high performance and high speed 5G network activate and explode the demands for ubiquitous information services that remove the limitations of time for the communication and places to request for the information. NN (Nearest Neighbor) search is one of the most important types of queries to be processed efficiently in the information services. Various indexes have been proposed to support efficient NN search in the wireless broadcast system. The indexes adopting Hilbert curve, grid partition or Voronoi diagram enable the clients to search for NN quickly in the wireless broadcast channel. It is necessary that an efficient means to evaluate the performances of various indexes. In this paper, we propose an open framework that can adopt a variety of indexing schemes and evaluate and compare the performances of them. The proposed framework is organized with open and flexible structure that can adopt hybrid indexing schemes extensible to Voronoi diagram as well as simple indexing schemes. With the implemented framework, we demonstrate the efficiency and scalability and flexibility of the proposed framework by evaluating various indexing schemes for NN query.

CEDI: A Cell-based Distributed Index for Energy Conserving Range Query Processing on Air

SeokJin Im(임석진),JinTak Choi(최진탁),SangKeun Lee(이상근) 한국정보기술학회 2008 한국정보기술학회논문지 Vol.6 No.1

This paper proposes Cell-based Distributed Spatial Index (shortly, CEDI) for effectively supporting range query in wireless data broadcast environment with spatial data. The proposed CEDI lets a client save the energy by listening to the only data contained within the given query window. The CEDI indexes the partitioned grid space and items in two-leveled scheme; the upper level index to the grid space with actual items, and the lower level index to items inside each cell in the grid space. Further, CEDI employs the concept of Implicit Data Pointing (shortly, IDP) to improve index search efficiency in the lower level index. The proposed CEDI has several nice properties: (1) considerably small index size, (2) table-formed linear structure suitable for linear access pattern of the client, and (3) multiple search paths by sharing links between distributed indexes. The simulation studies have been performed to evaluate the effectiveness of the proposed scheme. The result of simulation shows that CEDI can provide a significant performance improvement of energy consumption, while retaining low access latency.