• 디지털산업정보학회논문지
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• 제11권1호
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• pp.19-25
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• 2015

In this time, as an industrial society developed to a welfare society, more and more people want their quality of lives upgraded and specially customized service by mass production/mass consumption. And it leads to an increase of requiring service. There're active developments and studies on various IT equipment as the requirement made IT devices used in service. In this paper, we try to design and realize radio paging DID by using smart device to be used as a receiver of a radio pager which is broadly used at face to face service. Firstly, we used MCU to design and implement Wireless Calling Gateway which change radio calling signal of ISM band to smart device. A receiver of wireless caller used original receiver module. Also it used bluetooth module to communicate with smart device. It was possible to have satisfactory communication since radio paging signal converter and smart device were linked in 3M. Secondly, to indicate various paging information delivered from a radio pager, we realized DID application program by using Smart PAD. As a result, we could indicate various information compared to an original receiver which only could indicate letters or numeric data. Secondly, we implemented the DID app for wireless calls that can display a variety of information sent from a wireless pager. Was implemented using the Smart Pad. As a result, it is shown that can display a variety of information than the existing receiver.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 춘계종합학술대회
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• pp.571-574
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• 2001

무선인터넷이란 시스템의 구성에 따라 무선으로 음성, 데이터, 영상을 송ㆍ수신할 수 있는 서비스라고 할 수 있으며, 무선인터넷 산업은 정보통신 분야에서 전 세계적으로 가장 각광을 받고 있는 것 중의 하나가 되고 있다. 따라서, 세계는 무선인터넷 관련 단말기, 서비스, 인터넷망 및 솔루션 제공 등과 같은 기술개발 및 표준화에 박차를 가하고 있다. 본 고에서는 국내 무선인터넷 산업의 활성화와 경쟁력 있는 무선인터넷 서비스 제공을 위하여 각 요소별 국내외의 표준화 동향을 점검하고, 정부의 효율적인 무신인터넷 표준화 추진 정책방향을 진단해 보고자 한다.

• 디지털산업정보학회논문지
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• 제10권1호
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• pp.105-112
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• 2014

The utilization of Wireless Ad Hoc Network which can build easily network using wireless device in difficult situation to build network is very good. However, it has security threat element because it transfers data by only forwarding of wireless devices. The measures against this should be prepared because damage by especially routing attack can affect the entire network. It is hard to distinguish malicious node and normal node among nodes composing network and it is not easy also to detect routing attack and respond to this. In this paper, we propose new method which detect routing attack and can respond to this. The amount of traffic in all nodes is measured periodically to judge the presence or absence of attack node on the path set. The technique that hides inspection packet to suspected node and transmits is used in order to detect accurately attack node in the path occurred attack. The experiment is performed by comparing SRAODA and SEAODV technique to evaluate performance of the proposed technique and the excellent performance can be confirmed.

• 디지털산업정보학회논문지
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• 제5권3호
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• pp.117-126
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• 2009

Wireless mesh networks (WMNs) consist of mesh routers and mesh clients, where mesh routers have minimal mobility and form the backbone of WMNs. They provide network access for both mesh and conventional clients. The integration of WMNs with other networks such as the Internet, cellular, IEEE 802.11, IEEE 802.15, IEEE 802.16, sensor networks, etc., This paper presents a secure and efficient authentication mechanism for Wireless mesh network. The validity of proposed mechanism is provided by BAN logic and the efficiency of suggested mechanism is showed through the performance evaluation.

• 디지털산업정보학회논문지
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• 제5권2호
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• pp.101-107
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• 2009

In existing wireless ad-hoc networks, how to distribute network resources fairly between many users to optimize data transmission is an important research subject. However, in wireless mesh networks (WMNs), it is one of the research areas to avoid gateway bottleneck more than the fair network resource sharing. It is because WMN traffic are concentrated on the gateway connected to backhaul. To solve this problem, the paper proposes Weighted Fairness Time-sharing Access (WFTA). The proposed WFTA is a priority time scheduling scheme based on Weighted Fair Queuing (WFQ).

• 디지털산업정보학회논문지
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• 제16권2호
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• pp.61-68
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• 2020

Nuclear power plants have a lower cost of power generation, and they are more eco-friendly than other power generation plants. Also, we need to prepare nuclear plant accidents because of their severe damage. In the event of a safety accident, such as a radiation leak, by applying a wireless sensor network to a nuclear power plant, many sensor nodes can be used to monitor radiation and transmit information to an external base station to appropriately respond to the accident. However, applying a wireless sensor network to nuclear power plants requires routing protocols that consider the sensor network size and bypass obstacles such as plant buildings. In general, the hierarchical-based routing protocols are efficient in energy consumption. In this study, we look into the problems that may occur if hierarchical-based routing protocols are applied to nuclear power plants and propose improved routing protocols to solve these problems. Simulation results show that the proposed routing protocol is more effective in energy consumption than the existing LEACH protocol.

• 한국컴퓨터산업학회논문지
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• 제2권2호
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• pp.229-234
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• 2001

유량계는 일반 가정용 수도 계량기에서부터 석유ㆍ화학 등의 산업에 이르기까지 광범위하게 사용되고 있으며, 특히 무선 자동 유량계의 개발이 절실히 요구되어지고 있다. 본 논문에서는 제작과 구현이 간편한 컨트롤러인 PICBASIC을 이용하여 치차식 무선 자동 유량계를 제안하였다. 실험을 위하여 300미터 이내의 근거리 통신이 가능한 무선칩을 사용하여 무선 자동 유량 계측이 됨을 확인하였다.

• 디지털산업정보학회논문지
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• 제15권4호
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• pp.71-84
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• 2019

Various researchers conducted the research on two-factor authentication suitable for wireless sensor networks (WSNs) after Das first proposed two-factor authentication combining the smart card and password. After then, To improve the security of user authentication, elliptic curve cryptography(ECC)-based authentication protocols have been proposed. Jiang et al. proposed a privacy-aware two-factor authentication protocol based on ECC for WSM for resolving various problems of ECC-based authentication protocols. However, Jiang et al.'s protocol has the vulnerabilities on a lack of mutual authentication, a risk of SID modification and a lack of sensor anonymity, and user's ID exposed on sensor node Therefore, this paper proposed security enhanced privacy-aware two-factor authentication protocol for wireless sensor networks to solve the problem of Jiang et al.'s protocol, and security analysis was conducted for the proposed protocol.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2012년도 전기공동학술대회 논문집
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• pp.119-120
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• 2012

In the various industry plant, it need a condition monitoring system for an active machine that used an detachable wireless sensors. In this paper, IEEE802.15.4 standard based detachable wireless sensor monitoring system configure results will be introduced.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 추계종합학술대회
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• pp.525-528
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• 2001

무선인터넷이란 시스템의 구성에 따라 무선으로 음성, 데이터, 영상을 송 수신할 수 있는 서비스라고 할 수 있으며, 대개 협의의 무선인터넷(Mobile Internet)과 광의의 무선인터넷(Wireless Internet)으로 구분된다. 무선인터넷은 언제 어디서나 인터넷 접속이 가능하다는 점, 휴대하기 간편한 이동전화, PDA 등을 통해서 서비스가 이루어진다는 점, 대용량 네트워크의 구축으로 멀티미디어 서비스가 이루어진다는 점, 다양한 컨텐츠가 등장하여 소비자의 구미를 당기고 있다는 점 등으로 인하여 각광을 받고 있으며, 무선인터넷의 시장규모는 급속도로 확대되고 있다. 본 고에서는 무선인터넷의 표준화 및 프로토콜 동향에 대해 분석 하고자 한다.