• Title/Summary/Keyword: 무선통신 인터페이스

Search Result 361, Processing Time 0.022 seconds

Implementation of Telematics System Using Driving Pattern Detection Algorithm (운전패턴 검출 알고리즘을 적응한 텔레매틱스 단말기 구현)

  • Kin, Gi-Seok;Jung, Hee-Seok;Yun, Kee-Bang;Jeong, Kyung-Hoon;Kim, Ki-Doo
    • 전자공학회논문지 IE
    • /
    • v.45 no.4
    • /
    • pp.33-41
    • /
    • 2008
  • Telematics system includes the "vehicle remote diagnosis technology", "driving pattern analysis technology" which are commercially attractive in the real life. To implement those technologies, we need vehicle signal interface, vehicle diagnosis interface, accelerometer/yaw-rate sensor interface, GPS data processing, driving pattern analysis, and CDMA data processing technique. Based on these technologies, we analyze the error existence by diagnosing the EMS(Engine Management System), TMS(Transmission Management System), ABS/TCS, A/BAG in real time. And we are checking about a driving pattern and management of the vehicle, which are sent to the information center through the wireless communication. These database results will make the efficient vehicle and driver management possible. We show the effectiveness of our results by field driving test after completing the H/W & S/W design and implementation for vehicle remote diagnosis and driving pattern analysis.

A Vertical Handover Scheme Using Proxy Binding Update (프록시 바인딩 갱신을 이용한 수직적 핸드오버 기법)

  • Park, Hee-Dong
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.10 no.1
    • /
    • pp.15-20
    • /
    • 2010
  • This paper proposes a multihoming-based vertical handover scheme using Proxy binding update to minimize handover delay and packet loss while a mobile node moves to a heterogeneous access network. When a mobile node moves to a heterogeneous access network, the proposed scheme can provide a mobile node with fast and seamless handover by performing layer-3 handover using its new interface while the other interface is still communicating in the old access network. The proposed Proxy binding update is different from the Mobile IP binding update in that it includes home addres (HoA) of the old interface instead of the new interface. The performance analysis shows that the proposed scheme can efficiently reduce vertical handover delay and packet loss.

Control of a Mobile Robot Based on a Tangible Interface using iPhone (아이폰을 이용한 체감형 인터페이스 기반 이동 로봇 제어)

  • Jung, Hah-Min;Kim, Dong-Hun
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.21 no.3
    • /
    • pp.335-340
    • /
    • 2011
  • In the study, a tangible interface using iPhone is proposed to control a mobile robot, instead of remote control by a joystick or buttons. The robot is controlled by iPhone like a handle bar, since acceleration sensors of iPhone are used in the proposed method. The sensors measure the angles changed on the xyz coordinates of iPhone. And their sensor values are stabilized by digital filters. Bluetooth is chosen for communication between a mobile robot and iPhone. In this paper, four type methods are considered and one of the methods is selected for remote control of a mobile robot. Experimental results show that the robot is easily and conveniently controled by the tangible interface based on iPhone.

Development of ATP Train Separation Control Simulator for Radio-based Train Control System (무선통신기반 열차제어시스템 ATP 열차간격제어알고리즘 시뮬레이터 개발)

  • Yoon, Yong-Ki;Oh, She-Chan;Choi, June-Young;Park, Jae-Young;Yang, Hai-Won
    • Journal of the Korean Society for Railway
    • /
    • v.15 no.1
    • /
    • pp.29-36
    • /
    • 2012
  • This paper includes ATP(Automatic Train Protection) simulator development and ATP algorithm verification to allocate wayside and train-borne and verify ATP functions of communications based train control system. The train control system has some characteristics such as simple structure and high safety when wireless communication technology is applied to the train control system. Especially, vital functions can be performed with in wayside and train-borne ATP. However, different system can be realized because I/F contents vary in accordance with vital functional allocation of ATP. Drawing characteristics in accordance with wayside and train-borne functional allocation and drawing I/F details affected by such characteristics are needed accordingly. This paper includes ATP simulator development creating train location information by direct activation of an electric motor, verifies train safety distance control algorithm of ATP by functional allocation such as train movement authority and train speed limit to ATP, and draws any supplementation needed. Appropriate simulated environment for verify ATP algorithm and main factors that affect to the ATP function were confirmed.

A Study of Mobility support Analysis on Heterogeneous Wireless Network (이종 무선망간 이동성 제공 분석에 관한 연구)

  • Kim, Dong-Il
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2012.05a
    • /
    • pp.577-580
    • /
    • 2012
  • Communication environment has rapidly evolved into All-IP based core network, which is centered on a variety of access network, and develops into ubiquitous environment for each user due to the development of multiple interface terminals and the spread of contents usage. Especially, mobile streaming technologies and integrated authentication technologies are needed for mobile users to provide seamless mobility. The technology for seamless mobility services is an important issue. In this paper, the IEEE 802.21 MIH information server is based on the network offering handover technology between heterogeneous network.

  • PDF

Design and Implementation of Mobile Phone Interface Module for DGPS Correction Message Transmission (DGPS 보정신호 전송을 위한 휴대전화 인터페이스 모듈의 설계 및 구현)

  • Yi, Jae-hoon;Kim, Chang-Soo;Jeong, Seong-Hoon;Lee, Tae-Oh;Yun, Hee-Chul;Yim, Jae-Hong
    • Journal of Navigation and Port Research
    • /
    • v.26 no.4
    • /
    • pp.419-426
    • /
    • 2002
  • The conventional RTK-GPS technique has many problems which are permission using RF wireless modem, influence of geographic obstacle using radio wave, frequency interference, finiteness of frequency resources. To solve these problems, in this paper, we designed the DGPS correction message transmission system as a method to substitute the RF wireless modem of RTK-DGPS receiver. Then the interface module was designed and implemented for linkage of GPS receiver and mobile phone. As a result worked differential surveying using receiving correction message using RS-232C and communication control, users of mobile station were worked differential surveying correction between mobile phones. Interface module system was received the same result of precision which was compared RF wireless modem system.

위치정보와 GIS 고부가 컨텐츠 연계를 통한 LBS 고도화

  • Park, Gyeong-Eun;Do, Sun-Hui
    • Information and Communications Magazine
    • /
    • v.20 no.4
    • /
    • pp.82-91
    • /
    • 2003
  • 체세대 무선인터넷 서비스의 대표 주자로 정부 및 관련 업계에서 한층 주목받고 있는 위치기반 서비스(Location Based Services, 이하 LBS)의 상용화를 위해서는 무선망 기술, 위치측위 기술, 서비스 플랫폼 기술, GIS(Geographic Information System) 관련 기술, 단말기 기술 등과 같은 정보통신 산업 전반에 걸침 광범위한 핵심 요소 기술과 GIS와 고부가 컨텐츠와의 연계 및 다양한 응용 서비스 발굴 노력 등이 상호 유기적으로 결합되어야 한다. 최근에 국내외 이동통신사들이 본격적인 LBS 기반 인프라 구축에 서두르고 있는 이유도 LBS를 무선인터넷 서비스 분야의 차세대 주자로 인식하고 위치 찾기 서비스 부터 고부가 서비스까지 다양한 서비스를 제공하여 LBS의 대중화 및 이를 통한 수익 극대화를 실현시키고자 하는 의지의 반영이라 하겠다. 이렇게 급변하는 시장환경을 이해하고 실제 서비스 환경에 맞는 적용 방향으로 GIS 고부가 컨텐츠를 위치정보와 연계하여 고도화된 LBS를 제공하는 필수적인 GIS 고부가 컨텐츠의 효율적인 관리 및 LBS 확대 발전 방안을 제시하고자 한다. 또한 LBS 프레임워크상의 GIS 플랫폼(GIS 컨텐츠 서버)의 구성 및 세부 기능과 컨텐츠 및 서비스 제공자에게 제공할 공통 인터페이스 등을 제안함으로써 LBS 활성화 및 고도화를 위한 구체적인 추진 방법을 기술한다.

Design of In and Outdoor communication hub in Vehicular networks (차량 네트워크에서 내·외부 네트워크 연결을 위한 통신허브 설계)

  • Lee, Myung-Sub
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.12 no.3
    • /
    • pp.187-194
    • /
    • 2012
  • Vehicular communication networking is one of the most important building blocks of Intelligent Transportation System(ITS). The vehicular communication network is a wireless communication system enabling vehicles to communicate with each other as well as with roadside base stations. Especially, Wi-Fi based vehicle-to-infrastructure(V2I) communication is an emerging solution to improve the safety, traffic efficiency, and comfort of passengers. In this paper, we proposed a new communication hub platform for vehicles, and explained vehicle communication technology in short. Through car simulation results, we show thar our proposed system reduces signaling interference.

The Design and Implementation of Embedded Linux-Based Industrial Wireless HMI Software Module (임베디드 리눅스 기반 산업용 무선 HMI 소프트웨어 모듈 설계 및 구현)

  • Choi, Suk-Young;Moon, Seung-Jin
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.17 no.3
    • /
    • pp.336-342
    • /
    • 2007
  • Industrial HMI(Human Machine Interface) system is the main element among the factory automation processes and have been used to monitor and control operation and status of machine in factory with PLC. This HMI often brings heavy loads to the system development and difficult decreasing the system because it tends to use a specific system per each manufacturer. Therefore, in this thesis, we have developed an embedded linux-based embedded industrial HMI software modules which can be used for touch panel embedded system to solve these problem. In this module, we have used the Qt/Embedded software component because it can be used by all systems which support C++ compiler without modifying the existing codes. We can design more flexible system and network configuration because we have used the wireless communication module. In this thesis, we implement linux-based HMI software modules which are capable of wireless communication as well as bringing the mobility to the overall system and finally decreasing the system development loads by using the general purpose OS with competitive price.

Multi-Channel Switching Protocol Using Channel Busy Degree in Ad Hoc Wireless Networks with Multi-Interfaces (다중-인터페이스를 갖는 애드 혹 무선 네트워크에서 채널 혼잡도를 이용한 다중-채널 스위칭 프로토콜)

  • Lim, Hunju;Joung, Sookyoung;Lee, Sungwha;Park, Inkap
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.13 no.5
    • /
    • pp.239-247
    • /
    • 2013
  • In network based on multi-interface, there are needed channel assignment strategy that reduce interference and improve bandwidth efficiency by assigning each interface to available channels in order to utilize effectively multiple wireless interfaces on each node. MCS protocol had been proposed, which improve capacity and throughput of network by using hybrid assignment. MCS uses as the criterion to assign channel the number of node that use the same channel in contention area. but there have an problem that this information exactly does not reflect actually offered channel load. in this paper, we proposes CAMCS protocol to assign channel by that the channel busy degree to indicate the occupancy rate of channel by nodes as well as the number of nodes that use the same channel in inference area is used as criterion for estimation channel load, and conform performance improvement effect by simulation.