• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.5
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• pp.147-154
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• 2009

Lately, superhigh speed network infra is developing with the fast speed, is evolved by step that existent appliances are digitalised and appliances are become remote control by being gear to network. Also, gearing in Home network and superhigh speed network infra, control appliances in Internet and research that do monitering is proceed. Therefore, describe about indoor environment automatic control system that use Wireless sensor and Microcontroler in this paper. Because using that electric power, Zigbee sensor and Wireless module, embodied system that measured in the room temperature and use ATmega128 Microcontroler and use each device (temperature, illumination, humidity) back in house and control humidifier, electric fan etc. Can use variously in Home network field by this Wireless sensor and Microcontroler base, and also can apply variously to several industry fields as well as Home network field.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.695-698
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• 2007

The control of electrical appliances residing in the home network can be accomplished via Internet with the UPnP expansion without modifying an existing UPnP. In this paper, we propose the Internet Gateway that consists of an UPnP IGD(Internet Gateway Device) DCP(Device Control Protocol) and an UPnP Bridge as a system to control electrical appliances of home network. UPnP IGD DCP is to enable the configurable initiation and sharing of Internet connections as well as assuring advanced connection-management features and management of host configuration service. It also supports transparent Internet access by non-UPnP-certified devices. UPnP Bridge searches for local home network devices by sending control messages, while control point of UPnP Bridge looks up devices of interest on the Internet, subsequently furnishing the inter-networking controlling among devices which belong to different home network systems. With our approach, devices on one home network can control home electrical appliances on the other hone network via Internet through IGD DCP with control commands of UPnP.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.10
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• pp.1873-1880
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• 2016

Most of the energy used to operate a cellular network is consumed by a base station (BS), and reducing the transmission power of a BS is required for energy-efficient cellular networks. In this paper, a distributed transmit power control (TPC) algorithm is proposed based on the flocking model to improve the energy efficiency of a cellular network. Just as each bird in a flock attempts to match its velocity with the average velocity of adjacent birds, in the proposed algorithm each mobile station (MS) in a cell matches its rate with the average rate of the co-channel MSs in adjacent cells by controlling the transmit power of its serving BS. Simulation results show that the proposed TPC algorithm follows the same convergence properties as the flocking model and also effectively reduces the power consumption at the BSs while maintaining a low outage probability as the inter-cell interference increases. Consequently, it significantly improves the energy efficiency of a cellular network.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.6
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• pp.1055-1059
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• 2006

In Wireless Sensor Networks(WSNs), a sensor node broadcasts the acquisited sensing data to neighboring other nodes and it makes serious data duplication problem that increases network traffic loads and data loss. This problem is concerned with the conflict condition for supporting both the reliability of data transfer and avoidance of network congestion. To solve the problem, a reliable congestion control protocol is necessary that considers critical factors affecting on data transfer reliability such as reliable data transmission, wireless loss, and congestion loss for supporting effective congestion control in WSNs. In his paper, we proposes a reliable congestion protocol, called HRCCP, based on hop-hop sequence number, and DSbACK by minimizing useless data transfers as an energy-saved congestion control method.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.442-445
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• 2006

In Wireless Sensor Networks(WSNs), a sensor node broadcasts an acquisited data to neighboring other nodes and it makes serious data duplication problem that increases network traffic loads and data loss. This problem is concerned with the conflict condition for supporting both the reliability of data transfer and avoidance of network congestion. To solve the problem, a reliable congestion control protocol is necessary that considers critical factors affecting on data transfer reliability such as reliable data transmission, wireless loss, and congestion loss for supporting effective congestion control in WSNs. In this paper, we proposes a reliable congestion protocol, ratted HRCCP, based on hop-hop sequence number, and DSbACK by minimizing useless data transfers as an energy-saved congestion control method.

• Journal of Practical Engineering Education
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• v.10 no.2
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• pp.81-87
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• 2018

During the major sections of the network, Software-defined network control technology for the network area corresponding to the transmission network is becoming a change in network-controlled environments utilizing network operation and provisioning across the network industry. Currently development is underway along with the deployment of PTN equipment and configuration for provisioning is being phased out. It is actively introducing establishment of SDN-based control system while constructing provisioning of PTN equipment from actual commercial network. Therefore, in this thesis, we are going to look at the contents and trends of SDN systems in packet-based transmission networks based on PTN and use them in research on OpenDaylight, an open source for configuring SDN. It then Network Operator will study the software defined control techniques for operational education.

• Smart Media Journal
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• v.1 no.1
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• pp.58-63
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• 2012

It is a superordinate concept to a network control system which optimally distributes the battery power to overall length parts through the linkage control drive and absorbs/integrates network diagnostics and overlapped functions with overall length control systems. This study is to develop a system that maximize the battery power and motor effectiveness by controlling motor battery controlling module with common MCU Integration linkage controlling system, and to develop S/W and H/W that can be controlled by linked with each controlling module in CAN method through using Autosar's standardized software.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.319-320
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• 2022

본 논문에서는 내부 네트워크를 사용하여 여러 로봇들을 동시에 혹은 각각 제어할 수 있는 시스템을 제안한다. 이 시스템은 모바일, 데스크탑을 통해 원하는 로봇들을 다중 제어하고, 나아가서는 PJ link를 통한 프로젝터 제어, WOL을 통한 데스크탑 제어, 아두이노 레오나르도를 통한 키보드, 마우스 제어 등 여러 통합 컨트롤 시스템을 구축할 수 있다. 와이파이를 통한 시리얼 통신으로 esp8266과 컨트롤 pc 간의 통신이 이루어지고, I2C 통신을 통해 esp8266에서 레오나르도로 신호를 주어 다른 pc를 제어할 수 있다. 로봇의 경우에는 esp8266을 통해 직접적으로 제어가 가능하며 원하는 개수의 로봇을 동시에 혹은 각각 제어할 수 있다. 이러한 통합 컨트롤 시스템을 통해 여러 기기의 로봇을 보다 수월하게 제어가능하며 로봇뿐만 아니라 여러가지 기기들을 한번에, 수월하게 컨트롤 할 수 있게 된다.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.351-352
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• 2008

네트워크 기반의 씬 클라이언트 로봇은 내장된 리소스가 부족하지만 네트워크를 통해 이를 극복하려는 로봇이다. 씬 클라이언트 로봇에는 부족한 내장 리소스를 네트워크를 통해 효과적으로 운영하기 위한 디바이스 맵 프로토콜과 로봇 제어 및 개발 플랫폼으로써 로보이드 스튜디오가 제안되어 있다. 현재 로보이드 스튜디오는 공개 소프트웨어 방식으로 다양한 로봇을 지원하지만, 아직은 실제 지원되는 로봇의 종류가 부족하다. 따라서 새로운 로봇에 대한 이식 지원 방법과 다양한 이식 환경 속에서 문제점을 찾아 해결해야 한다. 우리는 첫 번째로 씬 클라이언트 로봇보다는 내장 리소스가 풍부하며, 광범위한 사용자층을 갖고 있는 LEGO NXT를 선택하여 로보이드 스튜디오 운영 및 개발 환경의 이식 절차를 제안하고, 로보이드 스튜디오 프레임워크가 제공하는 네트워크 기반 로봇 제어 기술의 성능을 검증한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11a
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• pp.425-428
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• 2003

본 논문은 유선통신망의 ATM기술을 무선통신망에 적용한 무선 멀티미디어 액세스 환경에서 패킷에러율 및 처리율등 전송성능을 개선하기 위한 통합에러제어 구조를 제안하였다. 음성, 데이터, 영상 등의 등시성 멀티미디어 트래픽을 처리해야 하는 무선 멀티미디어 네트워크에서는 트래픽별로 QoS(Quality of Service) 목표치가 다르므로 트래픽 속성에 상관없이 일괄적으로 성능개선기법들을 적용하는 것은 또 다른 성능저하 현상을 초래한다. 대표적인 멀티미디어 네트워크인 ATM 네트워크인 경우 트래픽 속성상 CBR(Constant Bit Rate) 및 랜덤트래픽은 지연에 매우 민감하며 VBR(Variable Bit Rate) 트래픽은 어느 정도의 지연은 허용되나 데이터 전송시 매우 높은 신뢰도를 필요로 한다. 이러한 배경에서 ATM을 기반으로 하는 무선 멀티미디어 네트워크 액세스 환경에서 트래픽별 QoS 속성을 만족시킬 수 있는 통합 에러제어 구조를 제시한 후 FEC, ARQ, 인터리빙, 버퍼용량등의 적용방안을 제시하였다.