• Title/Summary/Keyword: Mobile System Framework

Search Result 342, Processing Time 0.024 seconds

An Unified Representation of Context Knowledge Base for Mobile Context-Aware System

  • Jeong, Jang-Seop;Bang, Dae-Wook
    • Journal of Information Processing Systems
    • /
    • v.10 no.4
    • /
    • pp.581-588
    • /
    • 2014
  • To facilitate the implementation of a wide variety of context-aware applications based on mobile devices, general-purpose context-aware framework that applications can use by calling is needed. The context-aware framework is a middleware that performs the sensing, reasoning, and retrieving based on the knowledge base. The knowledge base must systematically represent the information required on the behavior of the context-aware framework, such as context information and reasoning information. It must also provide functions for storage and retrieval. To date, previous research on the representation of the context information have been carried out, but studies on the unified representation of the knowledge base has seen little progress. This study defines the knowledge base as the unified context information, and proposes the UniOWL, which can do a good job of representing it. UniOWL is based on OWL and represents the information that is necessary for the operation of the context-aware framework. Therefore, UniOWL greatly facilitates the implementation of the knowledge base on a context-aware framework.

A Study on the Photo-realistic 3D City Modeling Using the Omnidirectional Image and Digital Maps (전 방향 이미지와 디지털 맵을 활용한 3차원 실사 도시모델 생성 기법 연구)

  • Kim, Hyungki;Kang, Yuna;Han, Soonhung
    • Korean Journal of Computational Design and Engineering
    • /
    • v.19 no.3
    • /
    • pp.253-262
    • /
    • 2014
  • 3D city model, which consisted of the 3D building models and their geospatial position and orientation, is becoming a valuable resource in virtual reality, navigation systems, civil engineering, etc. The purpose of this research is to propose the new framework to generate the 3D city model that satisfies visual and physical requirements in ground oriented simulation system. At the same time, the framework should meet the demand of the automatic creation and cost-effectiveness, which facilitates the usability of the proposed approach. To do that, I suggest the framework that leverages the mobile mapping system which automatically gathers high resolution images and supplement sensor information like position and direction of the image. And to resolve the problem from the sensor noise and a large number of the occlusions, the fusion of digital map data will be used. This paper describes the overall framework with major process and the recommended or demanded techniques for each processing step.

Distributed Control Framework based on Mobile Agent Middleware

  • Lee, Yon-Sik
    • Journal of the Korea Society of Computer and Information
    • /
    • v.25 no.12
    • /
    • pp.195-202
    • /
    • 2020
  • The control system for the efficiency of resource utilization in sensor network environment based on object detection and environmental sensor requires active control function which based on sensor data acquisition and transmission functions and server's data analysis. Using active rule-based mobile agent middleware, this paper proposes a new distributed control framework that reduces the load of central sensor data server in sensor network environment by implementing remote data sensing and Zigbee-based communication with server and data analysis method of server. In addition, we implemented a power-saving system prototype using active rule-based distributed control methods that applied consumer's demand and environmental variables, and verified the validity of the proposed system through experiments and evaluations in the mobile agent middleware environment. The proposed system is a system framework that can efficiently autonomously control distributed objects in the sensor network environment, and it can be applied effectively to the development of demand response service based on optimal power control for the smart power system in the future.

Design Mobile Cross Framework Based MDA (MDA 기반의 모바일 크로스 프레임워크 설계)

  • Song, Yujin;Lee, Eun-Joo;Han, Deok-Soo
    • Journal of Korea Multimedia Society
    • /
    • v.19 no.8
    • /
    • pp.1445-1452
    • /
    • 2016
  • Recently Mobile Software Applications are developed in various languages and stored in App Store. App Users selectively use appropriate apps for the owned hardware. In other words, it depends on the kinds of operating systems of the apps whether to use or not to use the applications in various languages. The apps should be differently implemented according to the kind of the user's device, though they provide the same functions. To solve these problems, it is necessary to define an independent function specification method which is not dependent to a specific system environment. In this paper, the Mobile Application Developing Framework is suggested, which incorporates all of the development process. Standardized models are proposed which can be used in the analysis and design steps. In implementation phase, a technique for cross framework design is suggested so as to implement a platform dependent mobile app.

System Level Simulation of CDMA Network with Adaptive Array

  • Chung, Yeong-Jee;Lee, Jae-Woo
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.3 no.4
    • /
    • pp.755-764
    • /
    • 1999
  • In this study, the system level network simulation is considered with adaptive array antenna in CDMA mobile communication system. A network simulation framework is implemented based on IS-95A/B system to consider dynamic handoff, system level network behavior, and deploying strategy into the overall CDMA mobile communication network under adaptive array algorithm. Its simulation model, such as vector channel model, adaptive beam forming antenna model, handoff model, and power control model, are described in detail with simulation block. In order to maximize SINR of received signal at antenna, maximin algorithm is particularly considered, and it is computed at each simulation snap shot with SINR based power control and handoff algorithm. Graphic user interface in this system level network simulator is also implemented to define the simulation environments and to represent simulation results on real mapping system. This paper also shows some features of simulation framework and simulation results.

  • PDF

System Level Network Simulation of Adaptive Array with Dynamic Handoff and Power Control (동적 핸드오프와 전력제어를 고려한 적응배열 시스템의 네트워크 시뮬레이션)

  • Yeong-Jee Chung;Jeffrey H. Reed
    • Journal of the Korea Society for Simulation
    • /
    • v.8 no.4
    • /
    • pp.33-51
    • /
    • 1999
  • In this study, the system level network simulation is considered with adaptive array antenna in CDMA mobile communication system. A network simulation framework is implemented based on IS-95A/B system to consider dynamic handoff, system level network behavior, and deploying strategy into the overall CDMA mobile communication network under adaptive array algorithm. Its simulation model, such as vector channel model, adaptive beam forming antenna model, handoff model, and power control model, are described in detail with simulation block. In order to maximize SINR of received signal at antenna, Maximin algorithm is particularly considered, and it is computed at each simulation snap shot with SINR based power control and handoff algorithm. Graphic user interface in this system level network simulator is also implemented to define the simulation environments and to represent simulation results on real mapping system. This paper also shows some features of simulation framework and simulation results.

  • PDF

Framework and Technology of Integrated Ship-Shore Information System

  • Zhang, Ying-Jun;Dong, Fang;Zhang, Xiu-Guo;Zhu, Fei-Xiang
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2004.08a
    • /
    • pp.163-166
    • /
    • 2004
  • Integrated Ship-Shore Information System makes use of advanced technology of marine mobile communication and extends the computer network of shipping company to ship. This system conveniently accomplishes the information exchange between company and ship, guarantees navigation safety and improves commercial performance. The framework of integrated ship-shore information system and the analysis of its function are provided in this paper. Meanwhile, the idea based on the specification of J2EE to build this system is put forward and the relevant technology is demonstrated.

  • PDF

Method for Exposing Capability and Functionality of Mobile Network (이동통신 서비스 개방 기술 동향)

  • Bahg, Y.J.;Na, J.H.
    • Electronics and Telecommunications Trends
    • /
    • v.33 no.1
    • /
    • pp.111-122
    • /
    • 2018
  • In this review, several new technologies considered when providing an open service environment in a mobile communication network are described. Recently, 3GPP developed some standards related to IoT services for opening a service platform in an SCS environment based on the OSA concept in a 3GPP LTE system. Similarly, the development of a new framework is underway to allow a plurality of services to commonly use an API environment in which a service provider or client accesses a 5G mobile communication system. Extending the existing LTE SCEF concept, the standardization of the northbound API is applied in the 5G CAPIF environment. Therefore, it is possible to construct a framework that facilitates access from outside, and takes advantage of the common management of various open service environments. An open service platform environment is expected to play an important role in transforming a network with simple connectivity services into a variety of new service markets, or into a service environment that can create added value.

STEREOSCOPIC SERVICE OF MULTIVIEW VIDEO FOR MOBILE ENVIRONMENTS

  • Kwon, Jun-Sup;Kim, Man-Bae;Choi, Chang-Yeol
    • Proceedings of the Korean Society of Broadcast Engineers Conference
    • /
    • 2009.01a
    • /
    • pp.13-16
    • /
    • 2009
  • Multi-view video broadcasting have been conducted with a variety of different system architectures. However, the previous systems have focused on wired broadcasting. On the contrary, our system is designed to be applied to mobile 3DTV broadcasting. We present a service framework adaptable to mobile clients where the load on the client is reduced as much as possible. MPEG-21 multiview DIA description schemes are presented for the efficient adaptation between the serer and client. Furthermore, we examine the feasibility of the proposed framework by analyzing the frame rate that a client device can process.

  • PDF

Deep Learning Based On-Device Augmented Reality System using Multiple Images (다중영상을 이용한 딥러닝 기반 온디바이스 증강현실 시스템)

  • Jeong, Taehyeon;Park, In Kyu
    • Journal of Broadcast Engineering
    • /
    • v.27 no.3
    • /
    • pp.341-350
    • /
    • 2022
  • In this paper, we propose a deep learning based on-device augmented reality (AR) system in which multiple input images are used to implement the correct occlusion in a real environment. The proposed system is composed of three technical steps; camera pose estimation, depth estimation, and object augmentation. Each step employs various mobile frameworks to optimize the processing on the on-device environment. Firstly, in the camera pose estimation stage, the massive computation involved in feature extraction is parallelized using OpenCL which is the GPU parallelization framework. Next, in depth estimation, monocular and multiple image-based depth image inference is accelerated using the mobile deep learning framework, i.e. TensorFlow Lite. Finally, object augmentation and occlusion handling are performed on the OpenGL ES mobile graphics framework. The proposed augmented reality system is implemented as an application in the Android environment. We evaluate the performance of the proposed system in terms of augmentation accuracy and the processing time in the mobile as well as PC environments.