• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.409-411
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• 2005

본 논문은 대 규모 MANET(Mobile Ad hoc Network) 에서 서로 다른 프로토콜에 의해 운용되는 노드들간의 라우팅을 위한 방안을 제시한다. 이를 위해 존 마스터가 있는 계층적 MANET 구조를 가정한다. 존 마스터는 계층적 MANET을 형성하고 노드들을 존 단위로 관리하는 보조 인프라 노드이다. 또한 별도의 존 마스터간의 무선링크를 이용해 백본 망을 제공하여 효율적인 라우팅이 가능하다. 본 논문에서는 서로 다른 라우팅 프로토콜에 의해 동작되는 이종 노드간의 라우팅이 가능하도록 하기 위해 기존의 라우팅에 요구되는 확장 기능을 정의한다.

• Journal of Internet of Things and Convergence
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• v.6 no.4
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• pp.81-87
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• 2020

This paper creates a standard node for acquiring sensor data from various industrial sensors (IoT/non-IoT) for the establishment of Smart Factory Digital Twin, and provides inter-compatible data by linking zones by group/process to secure data stability and to ensure the digital twin (Digital Twin) of Smart Factory. The process of the Zone Master platform contains interface specifications to define sensor objects and how sensor interactions between independent systems are performed and carries out individual policies for unique data exchange rules. The interface for execution control of the Zone Master Platform processor provides system management, declaration management for public-subscribe, object management for registering and communicating status information of sensor objects, ownership management for property ownership sharing, time management for data synchronization, and data distribution management for Route information on data exchange.

• KIPS Transactions on Computer and Communication Systems
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• v.8 no.3
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• pp.73-78
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• 2019

Due to frequent topology changes in wireless networks, inter-node link disconnection and path re-establishment occur, causing problems such as overloading control messages in the network. In this paper, to solve the problems such as link disconnection and control message overload, we perform path setup in three steps of the neighbor node discovery process, the route discovery process, and the route management process in the wireless network environment. The link stability value is calculated using the information of the routing table. Then, when the zone master monitors the calculated link value and becomes less than the threshold value, it predicts the link disconnection and performs the path reset to the corresponding transmitting and receiving node. The proposed scheme shows a performance improvement over the existing OLSR protocol in terms of data throughput, average path setup time, and data throughput depending on the speed of the mobile node as the number of mobile nodes changes.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.57-59
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• 2018

무선 네트워크에서 토폴로지의 빈번한 변화로 노드 간 링크 단절과 경로재설정이 발생하여 네트워크 내에 제어메시지 과부하와 같은 문제점들이 발생한다. 본 연구에서는 링크 단절과 제어 메시지 과부하와 같은 문제점을 해결하기 위하여 무선 네트워크 환경에서 주변 노드 탐색과정, 경로 탐색과정, 경로관리과정의 3단계를 수행할 때 안정적인 전력, 높은 컴퓨팅 능력과 무선 신호 조절 능력이 있는 존 마스터(Zone Master)를 기반으로 하는 링크안정성 기법을 제안하였다. 제안한 기법은 다양한 무선 환경에서 기존의 OLSR라우팅 프로토콜보다 우수한 성능을 보임을 확인하였다.

• Journal of KIISE:Information Networking
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• v.34 no.4
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• pp.269-275
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• 2007

Since being constructed without any infrastructure-based network, ad hoc network has been received much attention as a key technology for ubiquitous networks. Due to high bit error rate and dynamically changing network topology in ad hoc network, the routing protocol that provides stable multi-hop communication path is the one of the key issues to address. The previously proposed ad hoc routing protocols have their limitations on network overhead, stability, and scalability. In this paper, we consider hybrid wireless network, which can overcome shortcomings of ad hoc network, and propose a novel routing protocol called zone master-based routing protocol. We verify with computer simulations that the proposed routing protocol outperforms other existing routing protocols in the various wireless environments.