• Title, Summary, Keyword: smart sensor network

Search Result 469, Processing Time 0.031 seconds

A Priority Based Transmission Control Scheme Considering Remaining Energy for Body Sensor Network

  • Encarnacion, Nico;Yang, Hyunho
    • Smart Media Journal
    • /
    • v.4 no.1
    • /
    • pp.25-32
    • /
    • 2015
  • Powering wireless sensors with energy harvested from the environment is coming of age due to the increasing power densities of both storage and harvesting devices and the electronics performing energy efficient energy conversion. In order to maximize the functionality of the wireless sensor network, minimize missing packets, minimize latency and prevent the waste of energy, problems like congestion and inefficient energy usage must be addressed. Many sleep-awake protocols and efficient message priority techniques have been developed to properly manage the energy of the nodes and to minimize congestion. For a WSN that is operating in a strictly energy constrained environment, an energy-efficient transmission strategy is necessary. In this paper, we present a novel transmission priority decision scheme for a heterogeneous body sensor network composed of normal nodes and an energy harvesting node that acts as a cluster head. The energy harvesting node's decision whether or not to clear a normal node for sending is based on a set of metrics which includes the energy harvesting node's remaining energy, the total harvested energy, the type of message in a normal node's queue and finally, the implementation context of the wireless sensor network.

Energy and Safety Efficient LED Street-light Control System Based on Ubiquitous Sensor Network (USN 기반의 에너지 및 안전성 효율적인 LED 가로등 제어 시스템)

  • Cho, Myeon-gyun;Kim, Shik;Yang, Woo Suk
    • IEMEK Journal of Embedded Systems and Applications
    • /
    • v.6 no.1
    • /
    • pp.25-31
    • /
    • 2011
  • LEDs are becoming the most suitable candidate replacing traditional fluorescent street-light lamps because of its energy efficiency and high brightness. Furthermore, most countries are urging to pursue energy savings in conjunction with IT and sensor network. In order to conserve energy of LED lamp and ensure the safety of pedestrian, we propose a new smart control method for LED light system based on USN using compound sensors, such as illuminance, motion, temperature and humidity sensor. An elaborate simulation shows that the proposed system with a smart control based switching can reduce the energy by 40%, compared to the previous street-light system with a fixed time based switching.

Design and Implementation of Double-Key based Light Weight Security Protocol in Ubiquitous Sensor Network (유비쿼터스 센서 네트워크에서 더블키를 이용한 경량 보안 프로토콜 설계 및 구현)

  • Zhung, Yon-Il;Lee, Sung-Young
    • The KIPS Transactions:PartC
    • /
    • v.14C no.3
    • /
    • pp.239-254
    • /
    • 2007
  • Ubiquitous computing supports environment to freely connect to network without restrictions of place and time. This environment enables easy access and sharing of information, but because of easy unauthorized accesses, specified security policy is needed. Especially, ubiquitous sensor network devices use limited power and are small in size, so, many restrictions on policies are bound to happen. This paper proposes double-key based light weight security protocol, independent to specific sensor OS, platform and routing protocol in ubiquitous sensor network. The proposed protocol supports safe symmetric key distribution, and allows security manager to change and manage security levels and keys. This had a strong merit by which small process can make large security measures. In the performance evaluation, the proposed light weight security protocol using double-key in ubiquitous sensor network allows relatively efficient low power security policy. It will be efficient to ubiquitous sensor network, such as smart of ace and smart home.

Compressed Sensing-Based Multi-Layer Data Communication in Smart Grid Systems

  • Islam, Md. Tahidul;Koo, Insoo
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.7 no.9
    • /
    • pp.2213-2231
    • /
    • 2013
  • Compressed sensing is a novel technology used in the field of wireless communication and sensor networks for channel estimation, signal detection, data gathering, network monitoring, and other applications. It plays a significant role in highly secure, real-time, well organized, and cost-effective data communication in smart-grid (SG) systems, which consist of multi-tier network standards that make it challenging to synchronize in power management communication. In this paper, we present a multi-layer communication model for SG systems and propose compressed-sensing based data transmission at every layer of the SG system to improve data transmission performance. Our approach is to utilize the compressed-sensing procedure at every layer in a controlled manner. Simulation results demonstrate that the proposed monitoring devices need less transmission power than conventional systems. Additionally, secure, reliable, and real-time data transmission is possible with the compressed-sensing technique.

IoT Delegate: Smart Home Framework for Heterogeneous IoT Service Collaboration

  • Kum, Seung Woo;Kang, Mingoo;Park, Jong-Il
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.10 no.8
    • /
    • pp.3958-3971
    • /
    • 2016
  • With Internet of Things (IoT) technology, home environment becomes smarter than ever. Not only smart devices such as smart phone or smart TV, but also various IoT devices including sensor, smart thermostat, and smart scale has now become very common on the market. These devices have connectivity to the Internet, so that user can read data from the device or control the device using Internet technology. However, due to diversity of smart home requirements, device collaboration in smart home remains a challenging task still. Usually smart home is built with various technologies to fulfill its own purpose, and these purposes cover very wide area from controlling low-power sensor devices to controlling high-performance devices like smart TV and smart phone. This variety of smart home requirements makes smart home very complicated due to mixed network architecture, protocol and technology. In this paper, a framework to enable managing and collaborating heterogeneous IoT devices in smart home environment is proposed. Several programming models are defined in the proposed framework to make application development for heterogeneous devices more intuitive. The proposed framework has been implemented as a web service, and a case study with real-world smart home IoT devices is presented.

Asset tracking system architecture using sensor network technology (센서 네트워크를 이용한 자산 모니터링 시스템 구조)

  • Kang, Jeong-Hoon;Lee, Min-Goo;Lee, Sang-Won;Ham, Kyung-Sun;Lee, Sang-Hak
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.426-428
    • /
    • 2004
  • Sensor network supports data delivery from physical world to cyber space Sensors get physical events then wireless network transfers sensor data to service server. We use sensor network technology to manage location information of asset. In ubiquitous computing environment, user localization is basic context for intelligent service. A lot of research group make effort to develop low cost localization technology. In this paper, we propose asset monitoring system using wireless sensor network. It is implemented using ad hoc network technology which can be adopted to smart home and this system can monitor the asset location and movement.

  • PDF

Fundamental Research of Strain-based Wireless Sensor Network for Structural Health Monitoring of Highrise building (초고층 건물의 건전성 감시를 위한 변형률 기반 무선 센서 네트워크 기법의 기초적 연구)

  • Jung, Eun-Su;Park, Hyo-Seon;Choi, Suk-Won;Cha, Ho-Jung
    • 한국방재학회:학술대회논문집
    • /
    • /
    • pp.429-432
    • /
    • 2007
  • For smart structure technologies, the interests in wireless sensor networks for structural health monitoring are growing. The wireless sensor networks reduce the installation of the wire embedded in the whole structure and save the costs. But the wireless sensor networks have lots of limits and there are lots of researches and developments of wireless sensor and the network for data process. Most of the researches of wireless sensor network is applying to the civil engineering structure and the researches for the highrise building are required. And strain-based SHM gives the local damage information of the structures which acceleration-based SHM can not. In this paper, concept of wireless sensor network for structural health monitoring of highrise building is suggested. And verifying the feasibility of the strain-based SHM a strain sensor board has developed and tested by experiments.

  • PDF

Assessing Throughput and Availability based on Hierarchical Clustering in Wireless Sensor Networks (계층적 클러스터링을 기반으로 하는 무선 센서 네트워크의 Throughput 과 Availability 평가)

  • Lee Jun-Hyuk;Oh Young-Hwan
    • Journal of Applied Reliability
    • /
    • v.5 no.4
    • /
    • pp.465-486
    • /
    • 2005
  • A unreliable network system results in unsatisfied performance. A performance criterion of a network is throughput and availability. One of the most compelling technological advances of this decade has been the advent of deploying wireless networks of heterogeneous smart sensor nodes for complex information gathering tasks, The advancement and popularization of wireless communication technologies make more efficiency to network devices with wireless technology than with wired technology. Recently, the research of wireless sensor network has been drawing much attentions. In this paper, We evaluate throughput and availability of wireless sensor network, which have hierarchical structure based on clustering and estimate the maximum hroughput, average throughput and availability of the network considering several link failure patterns likely to happen at a cluster consisted of sensor nodes. Also increasing a number of sensor nodes in a cluster, We analysis the average throughput and availability of the network.

  • PDF

Sensor Network based Localization and Navigation of Mobile Robot

  • Moon, Tae-Kyung;Kuc, Tae-Yong
    • 제어로봇시스템학회:학술대회논문집
    • /
    • /
    • pp.1162-1167
    • /
    • 2003
  • This paper presents a simple sensor network consists of a group of sensors, RF components, and microprocessors, to perform a distributed sensing and information transmission using wireless links. In the proposed sensor network, though each sensor node has a limited capability and a simple signal-processing engine, a group of sensor nodes can perform a various tasks through coordinated information sharing and wireless communication in a large working area. Using the capability of self-localization and tracking, we show the sensor network can be applied to localization and navigation of mobile robot in which the robot has to be coordinated effectively to perform given task in real time.

  • PDF

Building structural health monitoring using dense and sparse topology wireless sensor network

  • Haque, Mohammad E.;Zain, Mohammad F.M.;Hannan, Mohammad A.;Rahman, Mohammad H.
    • Smart Structures and Systems
    • /
    • v.16 no.4
    • /
    • pp.607-621
    • /
    • 2015
  • Wireless sensor technology has been opened up numerous opportunities to advanced health and maintenance monitoring of civil infrastructure. Compare to the traditional tactics, it offers a better way of providing relevant information regarding the condition of building structure health at a lower price. Numerous domestic buildings, especially longer-span buildings have a low frequency response and challenging to measure using deployed numbers of sensors. The way the sensor nodes are connected plays an important role in providing the signals with required strengths. Out of many topologies, the dense and sparse topologies wireless sensor network were extensively used in sensor network applications for collecting health information. However, it is still unclear which topology is better for obtaining health information in terms of greatest components, node's size and degree. Theoretical and computational issues arising in the selection of the optimum topology sensor network for estimating coverage area with sensor placement in building structural monitoring are addressed. This work is an attempt to fill this gap in high-rise building structural health monitoring application. The result shows that, the sparse topology sensor network provides better performance compared with the dense topology network and would be a good choice for monitoring high-rise building structural health damage.