• Title/Summary/Keyword: smart node

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Learning based relay selection for reliable content distribution in smart class application

  • Kim, Taehong
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.8
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    • pp.2894-2909
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    • 2015
  • As the number of mobile devices such as smart phones and tablets explodes, the need for new services or applications is also rapidly increasing. Smart class application is one of the emerging applications, in which most of contents are distributed to all members of a class simultaneously. It is highly required to select relay nodes to cover shadow area of radio as well as extend coverage, but existing algorithms in a smart class environment suffer from high control packet overhead and delay for exchanging topology information among all pairs of nodes to select relay nodes. In addition, the relay selection procedure should be repeated in order to adapt to the dynamic topology changes caused by link status changes or device's movement. This paper proposes the learning based relay selection algorithm to overcome aforementioned problems. The key idea is that every node keeps track of its relay quality in a fully distributed manner, where RQI (Relay Quality Indicator) is newly defined to measure both the ability of receiving packets from content source and the ability of successfully relaying them to successors. The RQI of each node is updated whenever it receives or relays broadcast packet, and the node having the higher RQI is selected as a relay node in a distributed and run-time manner. Thus, the proposed algorithm not only removes the overhead for obtaining prior knowledge to select relay nodes, but also provides the adaptability to the dynamic topology changes. The network simulation and experimental results prove that the proposed algorithm provides efficient and reliable content distribution to all members in a smart class as well adaptability against network dynamics.

Internet of Things based Smart Energy Management for Smart Home

  • TASTAN, Mehmet
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.13 no.6
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    • pp.2781-2798
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    • 2019
  • Thanks to internet, as one of indispensable parts of our lives, many devices that we use in our daily lives like TV, air conditioner, refrigerator, washing machine, can be monitored and controlled remotely by becoming more intelligent via Internet of Things (IoT) technology. Smart Home applications as one of the elements of smart cities, are individually the most demanded application without question. In this study, Smart Energy Management (SEM) system, based on NodeMCU and Android, has been designed for SEM, which is a part of the smart home application. With this system, household energy consumption can be monitored in real time, as well as having the ability to record the data comprising of operation times and energy consumption information for each device. Additionally, it is ensured to meet the energy needs on a maximized level possible, during the hours when the energy costs are lower owing to the SEM system. The Android interface provides the users with the opportunity to monitor and change their electricity consumption habits in order to optimize the energy efficiency, along with the opportunity to draw up of a daily and weekly schedule.

A Case Study of Smart Node System by using 3D Printing Technology (3D 프린팅을 활용한 스마트노드 시스템의 적용 사례)

  • Na, Sangho;Lee, JangHyun;Park, YoungMi;Kim, SungJin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2021.05a
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    • pp.6-7
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    • 2021
  • 3D printing has the unique advantage of the ability to customize freeform products even in small quantities. It was recently applied successfully in the node connection system for the irregular shaped glass design of Gwanggyo Galleria Department Store. This was achieved by applying 3D printing technology for an innovative smart node design. The novel system offers flexibility to address various design challenges in addition to maximizing construction quality and reducing construction period. In this paper, we aim to examine the use of 3D printing based innovative technologies in the construction industry. With this aim in mind, we present the case of the Gwanggyo Galleria Department Store's smart nodes. The key objective of this study is creating awareness in the construction industry of the need to utilize fourth industrial revolution technology in architecture.

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Study on the Connection Node System of Irregular-shaped Curtain wall Facade using 3D Printed Smart Node System (자유형상 커튼월 구현을 위한 3D 프린팅을 활용한 스마트노드 시스템의 연구)

  • Na, SangHo;Yoo, SeungKyu;Park, YoungMi;Park, JungJoon;Kim, SungJin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.11a
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    • pp.8-9
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    • 2018
  • 3D printing has the unique advantage of the ability to customize freeform product even in small quantity. However, we need to select and apply the only necessary parts of it because of the high cost of the manufacturing technology. It is of critical importance in irregular-shaped curtain walls to ensure precision of construction as well as quality fo finish. Complex shape that have structural members at varying angles can have nodes of different shapes making it unfeasible to construct using a general node connection detail. Therefore, this study aims to utilize smart node system using 3D printing as a solution to complex irregular-shaped curtain wall design.

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Improved Ad Hoc On-demand Distance Vector Routing(AODV) Protocol Based on Blockchain Node Detection in Ad Hoc Networks

  • Yan, Shuailing;Chung, Yeongjee
    • International Journal of Internet, Broadcasting and Communication
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    • v.12 no.3
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    • pp.46-55
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    • 2020
  • Ad Hoc network is a special wireless network, mainly because the nodes are no control center, the topology is flexible, and the networking could be established quickly, which results the transmission stability is lower than other types of networks. In order to guarantee the transmission of data packets in the network effectively, an improved Queue Ad Hoc On-demand Distance Vector Routing protocol (Q-AODV) for node detection by using blockchain technology is proposed. In the route search process. Firstly, according to the node's daily communication record the cluster is formed by the source node using the smart contract and gradually extends to the path detection. Then the best optional path nodes are chained in the form of Merkle tree. Finally, the best path is chosen on the blockchain. Simulation experiments show that the stability of Q-AODV protocol is higher than the AODV protocol or the Dynamic Source Routing (DSR) protocol.

A Nearly Optimal One-to-Many Routing Algorithm on k-ary n-cube Networks

  • Choi, Dongmin;Chung, Ilyong
    • Smart Media Journal
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    • v.7 no.2
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    • pp.9-14
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    • 2018
  • The k-ary n-cube $Q^k_n$ is widely used in the design and implementation of parallel and distributed processing architectures. It consists of $k^n$ identical nodes, each node having degree 2n is connected through bidirectional, point-to-point communication channels to different neighbors. On $Q^k_n$ we would like to transmit packets from a source node to 2n destination nodes simultaneously along paths on this network, the $i^{th}$ packet will be transmitted along the $i^{th}$ path, where $0{\leq}i{\leq}2n-1$. In order for all packets to arrive at a destination node quickly and securely, we present an $O(n^3)$ routing algorithm on $Q^k_n$ for generating a set of one-to-many node-disjoint and nearly shortest paths, where each path is either shortest or nearly shortest and the total length of these paths is nearly minimum since the path is mainly determined by employing the Hungarian method.

Implementation of motor control system using NodeJS and MongoDB (NodeJS와 MongoDB를 활용한 모터 동작 제어시스템 구현)

  • Kang, Jin Young;Lee, Young-dong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.10a
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    • pp.748-750
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    • 2017
  • With the development of intelligent technologies, the Internet of Things(IoT) has been applied to various applications. A platform technology including a sensor-server-DB for easily managing data at a remote site is required. In this paper, we implemented a servo motor control system that moves by the smart phone tilt value using NodeJS and MongoDB. The system consists of Rasberry Pi, servo motor and smart phone and the servo motor sensor data is transmitted to NodeJS so that data can be stored in database.

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Study on Availability Guarantee Mechanism on Smart Grid Networks: Detection of Attack and Anomaly Node Using Signal Information (스마트그리드 네트워크에서 가용성 보장 메커니즘에 관한 연구: 신호정보를 이용한 공격 및 공격노드 검출)

  • Kim, Mihui
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.23 no.2
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    • pp.279-286
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    • 2013
  • The recent power shortages due to surge in demand for electricity highlights the importance of smart grid technologies for efficient use of power. The experimental content for vulnerability against availability of smart meter, an essential component in smart grid networks, has been reported. Designing availability protection mechanism to boost the realization possibilities of the secure smart grid is essential. In this paper, we propose a mechanism to detect the availability infringement attack for smart meter and also to find anomaly nodes through analyzing smart grid structure and traffic patterns. The proposed detection mechanism uses approximate entropy technique to decrease the detection load and increase the detection rate with few samples and utilizes the signal information(CIR or RSSI, etc.) that the anomaly node can not be changed to find the anomaly nodes. Finally simulation results of proposed method show that the detection performance and the feasibility.

A Study on Location Supporting System for Smart Home (Smart Home을 위한 위치 정보 지원 시스템에 관한 연구)

  • Lee Sangbin;Han Kyuho;Lim Kyungsu;Ahn Sunshin
    • Proceedings of the Korean Information Science Society Conference
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    • 2005.07a
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    • pp.610-612
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    • 2005
  • Ubiquitous Computing 시대가 도래 하면서 집이나 빌딩 같은 실내 환경에서도 Ubiquitous Computing을 도입하려는 여러 연구가 진행되고 있다. 특히 Smart Home은 집 안에 여러 종류의 센서를 설치하여 센서로부터 얻는 정보를 바탕으로 사용자에게 다양한 서비스를 제공한다. 이와 같은 Smart Home을 구현하기 위해서는 사용자나 물체의 위치 정보가 매우 중요하다. 본 논문에서는 Smart Home에서 위치 정보를 지원하기 위해 초음파와 IEEE 802.15.4 기반의 센서 시스템을 제안한다. 이 시스템에서는 초음파를 사용함으로써 생기는 문제와 센서의 효율적인 에너지 관리를 위해 IEEE 802.15.4를 적용하였다. 이 시스템은 초음파 송신부를 가지고 있는 S-node 와 수신부를 가지고 있는 R-node 로 구성되어 있으며 본문에서 각각의 구조와 알고리즘에 대해 기술할 것이다.

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