• Title/Summary/Keyword: Wireless Home network

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Implementation of Home Network Services Using OpenWRT-based Wireless Access Point and Zigbee Communications (OpenWRT 기반 유무선 공유기와 Zigbee 통신을 이용한 홈 네트워크 서비스 구축)

  • Kwon, Kisu;Lee, Kyoung-Hee
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.2
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    • pp.375-381
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    • 2018
  • As smart home network services such as home CCTV, outdoor control of home appliances, home security and disaster prevention services become popular, there appear various affiliated products including smart home gateway and smart speaker. Since those services are generally developed on the vendors' individual hardware and software platforms, it is not much expected for them to interwork well among different architecture and communication methods. In this paper, we propose a new home network service system running on an open source platform to address such issues. We implemented a home network system using OpenWRT-based wireless router(or access point) and Zigbee communication technology. In the proposed system, a wireless router replaces a commercial home gateway and small control units implemented with Arduino control electronic devices and sensors in home. Several service scenarios are also implemented to verify the operability of the proposed system.

A Design of Intelligent Home Network Service using Wireless Sensor Network (무선 센서 네트워크를 이용한 지능형 홈 네트워크 서비스 설계)

  • Na, Sun-Wung;Lee, Sang-Jeong;Kim, Dong-Kyun;Choi, Young-Kil
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.5 s.43
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    • pp.183-193
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    • 2006
  • This paper suggests a service model which uses a wireless sensor network in home network environment. The sensor network consists of fixed sensor nodes and user identification nodes which is attached to each user. With the input information of the user preference profile and the collected data from the sensor nodes, the database is constructed as a context information and analyzed by a home server to provide a service that establishes and controls automatically home appliances according to each user's preference. The proposed service model is implemented and tested on a Linux server with MySQL database and sensor nodes on TinyOS.

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Design and Implementation of a Home Network System on OpenWrt using Android Remote Control (OpenWrt와 Android 연동 원격 홈 네트워크 제어 시스템 설계 및 구현)

  • Kim, Cheong Ghil
    • Journal of Satellite, Information and Communications
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    • v.7 no.3
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    • pp.130-134
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    • 2012
  • This paper introduces a home network service system using a low-cost wireless router on OpenWrt which can be remotely controled by Android devices. The proposed system consists of an embedded system development platform for home network service control based on OpemWrt embedded Linux, an embedded system development platform, a remote control on Android, and a home linghting device made by an interface board with LEDs. The prototype system is made of a wireless router of Buffalo, WZR-HP-G450H, Arduino Uno interface board with LEDs, and an Android development kit of HBE-SM5-S421. The operation was performed by TCP/IP programming for Android remote control, socket programming between Android development kit and wireless router, and UART communication programming between the interface board and wireless router. The implementation result shows that a low cost home network systme could be implemented with a wireless router.

A Design and Implementation of Home Network Access Agent and its Testbed (홈 네트워크 액세스 에이전트 및 테스트베드 설계 구현)

  • Kim, Dong-Kyun;Lee, Myoung-Kun;Jeon, Byung-Chan;Lee, Sang-Jeong
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.1 s.39
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    • pp.167-176
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    • 2006
  • In this paper, a home network access agent, which controls and monitors networked appliances at home using various terminals regardless of user's location, is designed and implemented. The proposed access agent integrates wire and wireless network on a home gateway (or home server) and is accessed with consistent messages using various terminals such as a web terminal, a PDA and a cellular phone. Also, in order to verify the operation and availability of the agent, a user interface for the various terminals is designed and a home network testbed which is accessed and controlled by the terminals is implemented.

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A Design of RS Decoder for MB-OFDM UWB (MB-OFDM UWB 를 위한 RS 복호기 설계)

  • Choi, Sung-Woo;Shin, Cheol-Ho;Choi, Sang-Sung
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2005.11a
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    • pp.131-136
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    • 2005
  • UWB is the most spotlighted wireless technology that transmits data at very high rates using low power over a wide spectrum of frequency band. UWB technology makes it possible to transmit data at rate over 100Mbps within 10 meters. To preserve important header information, MB-OFDM UWB adopts Reed-Solomon(23,17) code. In receiver, RS decoder needs high speed and low latency using efficient hardware. In this paper, we suggest the architecture of RS decoder for MB-OFDM UWB. We adopts Modified-Euclidean algorithm for key equation solver block which is most complex in area. We suggest pipelined processing cell for this block and show the detailed architecture of syndrome, Chien search and Forney algorithm block. At last, we show the hardware implementation results of RS decoder for ASIC implementation.

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Architecture of RS decoder for MB-OFDM UWB

  • Choi, Sung-Woo;Choi, Sang-Sung;Lee, Han-Ho
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • 2005.11a
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    • pp.195-198
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    • 2005
  • UWB is the most spotlighted wireless technology that transmits data at very high rates using low power over a wide spectrum of frequency band. UWB technology makes it possible to transmit data at rate over 100Mbps within 10 meters. To preserve important header information, MBOFDM UWB adopts Reed-Solomon(23,17) code. In receiver, RS decoder needs high speed and low latency using efficient hardware. In this paper, we suggest the architecture of RS decoder for MBOFDM UWB. We adopts Modified-Euclidean algorithm for key equation solver block which is most complex in area. We suggest pipelined processing cell for this block and show the detailed architecture of syndrome, Chien search and Forney algorithm block. At last, we show the hardware implementation results of RS decoder for ASIC implementation.

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A Quantitative Analysis of System-Level Performance of the Wireless LAN in Digital Home Environments

  • Son, Byoung-Hee;Kim, Hag-Bae
    • Journal of Ubiquitous Convergence Technology
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    • v.2 no.1
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    • pp.51-55
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    • 2008
  • A digital home is a ubiquitous environment that is expected to be realized in the near future. All information appliances in a house are connected to each other through wired and/or wireless home networks. Authenticated user can access the various services provided by the digital home, and the access is not restricted by equipment, time, or location. The technologies that form the digital home can be grouped into two categories: wired networking technologies and wireless networking technologies. For the purpose of ubiquitous environments, wireless-networks offer suitable and seamless high-quality services. A wireless LAN can be created simply by equipping a single access point. For that reason, the cost of establishing such a network is low and using it is easy. Of course, there is an exciting new wireless technology. It is the Ultra Wide Band (UWB). However, it is not enough to bring wireless convenience, although offering a broad range of high-speed data transfer capabilities, Because of unstable. Thus, of the wireless-networking systems, we focus on the wireless LAN. We quantitatively analyze its capabilities. The dynamic and adaptive wireless LAN provides a foundation for the evolution toward the next generation of wireless and adaptive networks. The difference between wired LAN and wireless LAN in upload and download rates is small. Although the wireless LAN experiences a greater loss rate than the wired LAN, the difference is minimal. We conclude that a wireless LAN is suitable for use in an apartment environment.

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A Design on LNA/Down-Mixer for MB-OFDM m Using 0.18 μm CMOS (CMOS를 이용한 MB-OFDM UWB용 LNA/Down-Mixer 설계)

  • Park Bong-Hyuk;Lee Seung-Sik;Kim Jae-Young;Choi Sang-Sung
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.16 no.2 s.93
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    • pp.139-143
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    • 2005
  • In this paper, we propose the design on LNA and Down-mixer for MB-OFDM UWB using $0.18\;{\mu}m$ CMOS. LNA, Down-mixer design result shows that it covers the frequency range ken 3 GHz to 5 GHz. The LNA gain is larger than 12.8 dB, and noise figure about 2.6 dB. Double balanced differential down-mixer is designed less than 2 dB gainflatness, and it has over 30 dB LO leakage, feedthrough characteristics.