• Title/Summary/Keyword: Wireless Video Sensor Network

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Frame Complexity-Based Adaptive Bit Rate Normalization (프레임 복잡도를 고려한 적응적 비트율 정규화 방법)

  • Park, Sang-Hyun
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.12
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    • pp.1329-1336
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    • 2015
  • Due to the advances in hardware technologies for low-power CMOS cameras, there have been various researches on wireless video sensor network(WVSN) applications including agricultural monitoring and environmental tracking. In such a system, its core technologies include video compression and wireless transmission. Since data of video sensors are bigger than those of other sensors, it is particularly necessary to estimate precisely the traffic after video encoding. In this paper, we present an estimation method for the encoded video traffic in WVSN networks. To estimate traffic characteristics accurately, the proposed method first measures complexities of frames and then applies them to the bit rate estimation adaptively. It is shown by experimental results that the proposed method improves the estimation of bit rate characteristics by more than 12% as compared to the existing method.

An Energy-Aware Cooperative Communication Scheme for Wireless Multimedia Sensor Networks (무선 멀티미디어 센서 네트워크에서 에너지 효율적인 협력 통신 방법)

  • Kim, Jeong-Oh;Kim, Hyunduk;Choi, Wonik
    • Journal of KIISE
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    • v.42 no.5
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    • pp.671-680
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    • 2015
  • Numerous clustering schemes have been proposed to increase energy efficiency in wireless sensor networks. Clustering schemes consist of a hierarchical structure in the sensor network to aggregate and transmit data. However, existing clustering schemes are not suitable for use in wireless multimedia sensor networks because they consume a large quantity of energy and have extremely short lifetime. To address this problem, we propose the Energy-Aware Cooperative Communication (EACC) method which is a novel cooperative clustering method that systematically adapts to various types of multimedia data including images and video. An evaluation of its performance shows that the proposed method is up to 2.5 times more energy-efficient than the existing clustering schemes.

A study on the implementation of the wireless video security system (무선 영상보안시스템 구현에 관한 연구)

  • Kim, Young-Min;Kim, Myeong-Hwan;Kim, Sun-Hyung
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.7 no.1
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    • pp.99-104
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    • 2012
  • In this paper, implementation of a wireless video security system relates to a situation outside of using infrared sensors to detect changes when using Zigbee network security in the area of the sensor sends information to the server. The server can judge the situation if an emergency situation through the IP network security camera shot of the area to be transferred command to pantilte. The camera images and information in the security area, sent to administrator's smartphone users to control the camera can see the situation and More than a small video security system was designed so that user can monitor the security zone. Finally, for real-time to identify and respond to emergency situations based on the available wireless networks for video surveillance systems were verified through research and implementation.

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A Marking Algorithm for QoS Provisioning in WMSN (WMSN에서 QoS 보장을 위한 마킹 알고리즘)

  • Kim, Jeonghue;Lee, Sungkeun;Koh, Jingwang;Jung, Changryul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.5 no.2
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    • pp.193-204
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    • 2010
  • Since Wireless Multimedia Sensor Network(WMSN) needs to process various multimedia data such as audio, image and video data as well as scalar data, it requires a mechanism that can support Quality of Service(QoS) to handle efficiently. This paper classifies traffic in WMSN as periodic monitoring traffic, event traffic, multimedia traffic and query-based traffic, proposes marking algorithm and queue management mechanism that guarantee differentiated QoS in terms of delay, energy efficiency and credibility on each traffic and conduct performance analysis with simulation.

Multipath and Multipriority based Routing Protocol for Wireless Multimedia Sensor Networks (무선 멀티미디어 센서 네트워크에서 다중 경로와 다중 우선순위 기반의 라우팅 알고리즘)

  • Lee, Dong-Hoon;Gautam, Navin;Pyun, Jae-Young
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.10 no.3
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    • pp.101-109
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    • 2011
  • In this paper, we present a new routing protocol, multipath and multi-priority based routing protocol, (MMRP) for wireless multimedia sensor networks. The proposed MMRP chooses the multiple routing paths from source to the sink, then the selected paths are assigned with different priority levels depending upon the residual energy and transmission delay in the routing paths. That is, the highly prioritized I frames of the MPEG video are transmitted over the high priority routing paths, and other P and B frames are transmitted over the lower priority routing paths. The proposed MMRP protocol can be applied to time critical applications which require both lower latency and low power consumption over wireless multimedia sensor network. Simulations results of MMRP protocol show respectively an improvement of 23.48% and 23.11% in energy conservation and 81.6% and 32.01% improvement in latency as compared to protocols without and with multipath routing.

A Security Module for Vehicle Network Communication (차량 네트워크 통신용 보안 모듈)

  • Kwon, Byeong-Heon;Park, Jin-Sung
    • Journal of Digital Contents Society
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    • v.8 no.3
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    • pp.371-376
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    • 2007
  • Many modules such as controller, sensor, telematics terminal, navigation, audio and video are connected each other via vehicle network (CAN, MOST, etc). Futhermore, users can have ITS or internet services in moving by connecting to wireless mobile network. These network capabilities can cause a lots of security issues such as data hacking, privacy violation, location tracking and so on. Some possibilities which raise a breakdown or accident by hacking vehicle operation data (sensor, control data) are on the increase. In this paper, we propose a security module which has encryption functionalities and can be used for vehicle network system such as CAN, MOST, etc. This security module can provide conventional encryption algorithms and digital signature processing functionality such as DES, 3-DES, SEED, ECC, and RSA.

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Development of E-learning System for Vocational Rehabilitation of Students with Mental Retardation (정신지체 학생의 직업교육을 위한 e-러닝 시스템 개발)

  • Kim, C.G.;Ryu, G.J.;Song, B.S.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.6 no.2
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    • pp.49-54
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    • 2012
  • In this study, an E-learning system was developed for vocational rehabilitation training of intellectual disabilities. The developed system is available to have acquirement of knowledge through step by step learning and is configured to relearn through problem-solving and demonstration video. In addition, the learned information was composed to check the configuration which is correctly learning through rehearsal function. The device for rehearsal consists of a transmitter and the receiver. The transmitter is formed Pressure sensor, IR sensor for detecting client's work and Bluetooth module for wireless network. The receiver includes a Bluetooth module for wireless network and USB input terminal for communication with computer.

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Resource Reservation Based Image Data Transmission Scheme for Surveillance Sensor Networks (감시정찰 센서 네트워크를 위한 자원예약 기반 이미지 데이터 전송 기법)

  • Song, Woon-Seop;Jung, Woo-Sung;Ko, Young-Bae
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.39C no.11
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    • pp.1104-1113
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    • 2014
  • Future combat systems can be represented as the NCW (Network Centric Warefare), which is based on the concept of Sensor-to-Shooter. A wireless video sensor networking technology, one of the core components of NCW, has been actively applied for the purpose of tactical surveillance. In such a surveillance sensor network, multi-composite sensors, especially consisting of image sensors are utilized to improve reliability for intrusion detection and enemy tracing. However, these sensors may cause a problem of requiring very high network capacity and energy consumption. In order to alleviate this problem, this paper proposes an image data transmission scheme based on resource reservation. The proposed scheme can make it possible to have more reliable image data transmission by choosing proper multiple interfaces, while trying to control resolution and compression quality of image data based on network resource availability. By the performance analysis using NS-3 simulation, we have confirmed the transmission reliability as well as energy efficiency of the proposed scheme.

Silvercare Services using Mobile Devices (모바일 기기를 활용한 Silvercare 서비스)

  • Kim, Beom-Seok;Lee, Hyun-Cheol;Hur, Gi-Teak;Ko, Young-Hyuk
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.3
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    • pp.225-232
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    • 2009
  • Increasing the number of the solitude old person maintain a healthy lifestyle, the research for the emergency detection and life monitoring is required. In this paper, the wireless sensor network technology is utilized to design a silver-care service model in the area of emergency silver generation activities. The service model proposed in this paper acquired by using mobile devices to access silver-care service with the network information obtained through video monitoring and sensing. Also, Proposed model, based on wide-area network connected with the best wireless network of the PDA and mobile phones for the solitude old person.

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A Study of Fusing Scheme of Image and Sensing Data Using Index Method (인덱스를 이용한 동영상과 센싱 데이터 융합 방안 연구)

  • Hyun, Jin Gyu;Lee, Young Su;Kim, Do Hyeun
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.8 no.6
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    • pp.141-146
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    • 2008
  • Recently, it is studying to provide to users through internet in the SensorWeb of OGC(Open Geospatial Consortium) saving and maintaining data and image information gathered from sensor network. It is necessary to study about data convergence as binding audio and video for delivering the sensing data and image information to users with real-time system. In this article, it suggests how to convergence sensing data and moving picture collected from the sensor network using index. This program indicates both of them that collected sensing data and information identified of moving picture in the integration index and based on this program provides sensing data moving picture at the same time referencing integration index, if the user asks. To verify suggested method designing real-time multimedia service structure using sensor network and image installation and implementing Ubiquitous realtime multimedia system integrating moving picture and sensing data based on index. As a result of this program, it is confirmed providing real-time multimedia service to request information of application service using integration index collected image and sensing data from wireless sensor network and image installation suggested data convergence method.

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