• 제목/요약/키워드: WSN(Wireless sensor network)

검색결과 645건 처리시간 0.031초

Clustering 및 위치정보를 활용한 WSN(Wireless Sensor Network) 성능 향상 방안 연구 (A Study for Improving WSNs(Wireless Sensor Networks) Performance using Clustering and Location Information)

  • 전진한;홍성훈
    • 한국정보통신학회:학술대회논문집
    • /
    • 한국정보통신학회 2019년도 춘계학술대회
    • /
    • pp.260-263
    • /
    • 2019
  • 접근이 어렵거나 지속적인 모니터링이 필요한 서비스에 적용 가능한 WSN(Wireless Sensor Network) 기술은 최근 그 응용 분야의 확대 및 효율성으로 연구 개발의 필요성이 점증하고 있는 분야이다. 본 논문은 WSN의 패킷 전송률을 증가시키고 센서 노드들의 수명을 연장하기 위해 제시된 기존 연구들을 분석한 후, 센서 노드들에 Clustering 및 위치 기반 기법 적용 시 기존 연구 대비 성능 향상 요인들을 분석하였으며 이를 기반으로 패킷 손실률과 네트워크 수명 측면에서 향후 WSN의 성능 향상을 위한 새로운 기법에 대한 연구를 수행 할 예정이다.

  • PDF

Design of ESN(Educational Sensor Network) for interpretation of the data

  • Park, In-Deok;Paek, Seung-Eun;Kim, Si-Kyung
    • 정보학연구
    • /
    • 제12권3호
    • /
    • pp.1-6
    • /
    • 2009
  • This paper has focused on the development of an educational sensor network (ESN) based on wireless sensor networks(WSN) and pervasive monitoring systems for students' activity during scientific experiments. A number of WSN systems have been proposed with integrated wireless transmission, mounted sensor boards and local processing. However, there is no trail to employ WSN on the educational field. In this paper, to facilitate research and development using wireless sensor network and multi-sensor data fusion, the educational sensor network (ESN) hardware development platform is presented. The ESN project is conducted over one semester time period (Spring Semesters). It involves approximately twenty middle school students who enrolled a gifted program in Kongju National University. Though under prepared, these students are in general highly motivated to learning specially when presented with the ESN project. An ESN project such as this is expected to provide an excellent means for teaching and learning scientific and mathematical principles.

  • PDF

무선 인체 센서 네트워크용 시각 동기화 프로토콜 (A Time Synchronization Protocol for Wireless Body Sensor Networks)

  • 배시규
    • 정보처리학회논문지:컴퓨터 및 통신 시스템
    • /
    • 제5권6호
    • /
    • pp.127-134
    • /
    • 2016
  • 무선인체센서네트워크(WBSN: Wireless Body Sensor Network)은 일반적으로 무선인체네트워크(WBAN: Wireless Body Area Networks)라고도 불리는데, 일종의 무선센서네트워크(WSN: Wireless Sensor Network)의 응용 중에 하나로, 인간의 신체에 이식되거나 착용하는 형태의 감지노드들로 인체 가까이에 설치된다. WBSN에 설치된 각 노드로부터 측정된 데이터는 싱크 노드에서 인체 상태를 분석하기 위하여 사용되는데, 다른 무선센서네트워크 응용과 마찬가지로 노드와 싱크 노드는 서로 동기화되어야 한다. 무선센터네트워크에서 동작하는 여러시각 동기화 프로토콜이 제안되어왔으나 WBSN에 적용하기에는 부적합하다. 이 논문에서는 WBSN의 특성을 고려하여 새로운 시각 동기화 프로토콜을 제안한다. 제안한 프로토콜은 간단할뿐만 아니라 전력 소모가 작아 네트워크의 수명을 오랫동안 유지할 수 있게 한다. 제안 방안의 성능을 시뮬레이션을 통해 평가하였으며, WBSN에서 구현하기에 적합함을 보였다.

다중 홉 무선 센서네트워크를 위한 시간 동기화 기법 (Time Synchnorinization Scheme for Multi-Hop Wireless Sensor Network)

  • 김기현;엄태환;홍원기
    • 대한임베디드공학회논문지
    • /
    • 제2권3호
    • /
    • pp.138-144
    • /
    • 2007
  • Wireless Sensor Network(WSN) consists of a lot of light-weight sensor nodes with the capability of wireless communication. Studies have been done to improve stability and fault-tolerancy of WSN because the sensor nodes are basically vulnerable to the harsh environment. Specially, the time synchronization among sensor nodes becomes a challenging issue in WSN. All the local times should always keep the same with each other in the sensor field to perform data aggregation and energy-aware communication in WSN. In this paper, a new time synchronization technique is proposed to operate efficiently irrespective of the number of sensor nodes and the number of hops needed to cover all sensor nodes for synchronization. Simulation results show that the proposed technique has the lowest amount of packet traffic among the several time synchronization techniques.

  • PDF

A Survey on Key Management Strategies for Different Applications of Wireless Sensor Networks

  • Raazi, Syed Muhammad Khaliq-Ur-Rahman;Lee, Sung-Young
    • Journal of Computing Science and Engineering
    • /
    • 제4권1호
    • /
    • pp.23-51
    • /
    • 2010
  • Wireless Sensor Networks (WSN) have proved to be useful in applications that involve monitoring of real-time data. There is a wide variety of monitoring applications that can employ Wireless Sensor Network. Characteristics of a WSN, such as topology and scale, depend upon the application, for which it is employed. Security requirements in WSN vary according to the application dependent network characteristics and the characteristics of an application itself. Key management is the most important aspect of security as some other security modules depend on it. We discuss application dependent variations in WSN, corresponding changes in the security requirements of WSN and the applicability of existing key management solutions in each scenario.

무선센서네트웨크를 위한 에너지 효율적인 MAC 프로토콜 설계 (Design of Energy Efficient MAC protocol for Wireless Sensor Networks)

  • 강현중;임혁진;주휘동;이명훈;여현
    • 한국정보통신학회:학술대회논문집
    • /
    • 한국해양정보통신학회 2007년도 추계종합학술대회
    • /
    • pp.445-448
    • /
    • 2007
  • 본 논문에서는 WSN(Wireless Sensor Networks)을 구성함에 있어 에너지 소비효율이 우수한 MAC 프로토콜을 제안하고자 한다. WSN은 매우 작은 크기의 단말에 무선통신모듈, MPU, 센싱모듈 등을 탑재하고 환경데이터를 측정하며 이를 자가망 구성을 통해 수신단으로 전송하는 기술을 말한다. 이러한 WSN에서 사용되는 단말은 에너지자원이 한정적인 단점이 있으며, 이를 극복하기 위한 효율적인 네트워크 운영이 최근 주요 이슈로 등장하고 있다. 따라서 본 논문에서는 기존의 S-MAC을 개선하여 네트워크를 구성하는 단말들이 보다 효율적으로 에너지를 소모하도록 유도함으로써 네트워크 상태에 맞는 스케줄링과 데이터 전송이 이루어지게 하는 방법을 제안한다.

  • PDF

Design and Implementation of Wireless Sensor Network for Freeze Dryer

  • Cho, Young Seek;Kwon, Jaerock;Choi, Seyeong
    • Journal of information and communication convergence engineering
    • /
    • 제13권1호
    • /
    • pp.21-26
    • /
    • 2015
  • A wireless sensor network (WSN) is designed and implemented for a freeze dryer. Freeze-drying technology is widely used in the fields of pharmacy and biotechnology as well as the food and agriculture industries. Taking into account the demand for high-resolution pressure and temperature measurements in a freeze dryer, the proposed WSN has a significant advantage of creating a monitoring environment in a freeze dryer. The proposed WSN uses a ZigBee/IEEE 802.15.4 network with an altimeter module that contains a high-resolution pressure and temperature sensor with a serial digital data interface. The ZigBee network is suitable for low-energy and low-data-rate applications in the field of wireless communication. The altimeter module is capable of sensing pressure in the range of 7.5-975 Torr (10-1300 mbar) and temperature in the range of $-40^{\circ}C$ to $125^{\circ}C$ with a DC power consumption of $3{\mu}W$. The implemented WSN is installed in a commercial laboratory freeze dryer in order to demonstrate its functionality and efficiency. A comparison with the temperature profile measured by a thermocouple installed in the freeze dryer reveals that the resolution of the temperature profile measured by WSN is superior to that measured by the thermocouple.

u-방재 기술 구현을 위한 WSN 구축요소에 관한 연구 (A Study on the WSN Construction Factors for Implementation of U-Disaster Prevention)

  • 이석철;전태건;심혜인;김창수
    • 한국방재학회:학술대회논문집
    • /
    • 한국방재학회 2008년도 정기총회 및 학술발표대회
    • /
    • pp.361-364
    • /
    • 2008
  • 무선 센서 네트워크(Wireless Sensor Network: WSN)의 응용서비스 모델은 센서, 마이크로 컨트롤러, 무선 통신 칩셋을 결합한 센서 하드웨어에 의한 센서 네트워크, 데이터 처리를 위한 미들웨어, 사용자 서비스의 형태로 구성된다, 이러한 WSN응용은 환경모니터링, 공장자동화와 같은 분야에 적용되어 왔고, 주로 사람이 감시하기 힘든 원격 모니터링을 기반으로 하는 응용서비스에 집중되어 왔다. 본 논문에서는 무선 센서 네트워크의 응용모델을 기반으로 유비쿼터스 방재 시스템에 적용하기 위한 구축 고려요소에 대해 서술하고, 그 응용 범위의 적합성을 논한다. 제안하는 모델은 무선 센서 네트워크 하드웨어, 라우팅 기술, 미들웨어 구성요소, 보안정책에 관한 내용이 포함되어 있다.

  • PDF

Fire Detection Method Using IoT and Wireless Sensor Network

  • Park, Jung Kyu;Roh, Young Hwa;Nam, Ki hun;Seo, Hyung Yoon
    • 한국컴퓨터정보학회논문지
    • /
    • 제24권8호
    • /
    • pp.131-136
    • /
    • 2019
  • A wireless sensor network (WSN) consists of several sensor nodes and usually one base station. In this paper, we propose a method to monitor topics using a wireless sensor network. Fire threatens people, animals, and plants, and it takes a lot of recovery time when a fire occurs. For this reason, it is necessary to use a fire monitoring system that is easy to configure and fast to avoid fire. In this paper, we propose a fast and easily reliable fire detection system using WSN. The wireless node of the WSN measures the temperature and brightness around the node. The measured information is transferred to the workstation and to the base station. The workstation analyzes current and historical data records to monitor the fire and notify the manager.

A Construction of An Intelligent Industry Network through Wireless Sensor Network

  • Yun, Yeo-hong;Hwang, Kwang-il;Han, Woo-young;Eom, Doo-seop
    • 대한전자공학회:학술대회논문집
    • /
    • 대한전자공학회 2003년도 하계종합학술대회 논문집 I
    • /
    • pp.465-468
    • /
    • 2003
  • In industry areas, a lot of factories and process plants need network for processing data acquired from field and for communicating between sensors or actuators or field controllers. Most of the industry networks are based on wired solutions. But, recently, a lot of factories and process plants are moving into wireless solutions since they have some advantages compared with wired one. In this paper we first review the characteristics of wired and wireless network technologies and introduce the new technique called wireless sensor network (WSN). And then we describe the wireless sensor node system designed by us for WSN which has the ability of small size, flexibility and low-power consumption and embedded into the Bar-code scanner to communicate each other. Finally, we conclude this paper by showing that wireless industry network can be constructed with wireless sensor network without large change of traditional wired topologies through experiment using wireless sensor nodes.

  • PDF