• Electronics and Telecommunications Trends
• /
• v.27 no.2
• /
• pp.31-40
• /
• 2012

광대역 통신 기술은 일반 사용자를 대상으로 고속의 데이터 전송 및 고품질의 음성통화와 영상통화 등을 포함하는 멀티미디어 서비스 제공을 위해 발전 중이다. 나아가 국민의 안전과 생명보호를 위한 공공안전 및 재난구조(PPDR, Public Protection and Disaster Relief)를 위한 범국가적 통신망과 원격 감시, 측정, 보고 및 제어 등을 위한 스마트그리드(smart grid) 및 M2M(Machine-to-Machine) 통신을 위한 광대역 통신망 구축이 기대된다. 본고에서는 공공안전 및 재난구조 통신과 M2M 통신 응용을 지원하는 광대역 무선접속 표준화 동향과 기술 개념을 살펴보고자 한다.

• Journal of Information Processing Systems
• /
• v.14 no.4
• /
• pp.1033-1048
• /
• 2018

This paper proposes an integrated lighting enabler system (ILES) based on standard machine-to-machine (M2M) platforms. This system provides common services of end-to-and M2M communication for smart lighting system. It is divided into two sub-systems, namely end-device system and server system. On the server side, the M2M platform OpenMTC is used to receive data from the sensors and send response for activating actuators. At the end-device system, a programmable smart lighting device is connected to the actuators and sensors for communicating their data to the server. Some experiments have been done to prove the system concept. The experiment results show that the proposed integrated lighting enabler system is effective to reduce the power consumption by 25.22% (in average). The proving of significance effect in reducing power consumption is measured by the Wilcoxon method.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.606-608
• /
• 2015

In order to bear a relationship between the devices in the IoT environment whereby the task of navigating the device and relationship should be preceded before. The new device transmits a search signal in order to find a device and a peripheral device that receives this will determine the distance information of the device and determines the intensity of the transmitted signal. M2M (Machine to Machine) method has been used in conventional sends the search signal to all of the peripheral devices in a single device, a peripheral device that is greater the search time becomes long, a problem that a loss of information, the more devices that are far there is. In this paper, a method to compensate for problems of existing methods of M2M devices and new shortening of the search time when the search for the peripheral device, an algorithm to reduce the information loss of time to send and receive signals from the navigation device and away proposals were discussed and used in the field.

• Proceedings of the KAIS Fall Conference
• /
• 2010.11a
• /
• pp.221-224
• /
• 2010

본 논문에서는 M2M에서의 WPA 기반의 인증 매커니즘을 제안하였다. 기기 간에 인증서를 배포하고 인증서를 이용하여 하나의 기기만 인증하는 것이 아닌 통신에 참여하는 기기 모두를 인증할 수 있는 매커니즘으로서 위장공격에 대한 위험위협 요소를 방어 할 수 있는 보안을 제공한다.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.3 no.2
• /
• pp.91-93
• /
• 1978

A methodology which can be employed to obtain an optimal preventive maintenance policy that maximizes the total machine running time over the specified working period is proposed. A system considered is comprised of m machines and r

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.6 no.1
• /
• pp.84-97
• /
• 2012

M2M (Machine-to-Machine) Technology makes it possible to network all kinds of terminal devices and their corresponding enterprise applications. Therefore, several M2M platforms were developed in China in order to collect information from terminal devices dispersed all over the local places through 3G wireless network. However, when enterprise applications try to integrate with M2M platforms, they should be maintained and refactored to adapt the heterogeneous features and properties of M2M platforms. Moreover, syntactical and semantic unification for information sharing among applications and devices are still unsolved because of raw data transmission and the usage of distinguished business vocabularies. In this paper, we propose and develop an M2M Middleware to support agile application integration with M2M platform. This middleware imports the event engine and XML-based syntax to handle the syntactical unification, makes use of Ontology-based semantic mapping to solve the semantic unification and adopts WebService and ETL techniques to sustain multi-pattern interactive approach, in order to agilely make applications integrated with the M2M platform. Now, the M2M Middleware has been applied in the China Telecom M2M platform. The operation results show that applications will cost less time and workload when being integrated with M2M platform.

• Journal of Korea Multimedia Society
• /
• v.17 no.12
• /
• pp.1473-1483
• /
• 2014

A public restroom is different from a household toilet in terms of location and a large number of sharing users. In addition, public restroom is usually messy and filthy. Recently, public toilet tends to be clearly managed than before, but it still has hygienic and clear problems. In this paper, we propose a machine-to-machine (M2M)-based public restroom management system to solve these problems, in which the system with a wireless communication device sends the status information of the toilet, such as blockage or trouble detected by a sensor, to the manager of the restroom at a remote location. In particular, we have developed a prototype management system for public restroom taking into account several system requirements, and verified the basic operations and performance of the management system. With the application of the system to public facilities, it will furnish users with more pleasant environments by restroom administrators who can respond effectively to the troubled toilet.

• Journal of Software Assessment and Valuation
• /
• v.15 no.2
• /
• pp.85-93
• /
• 2019

In an open, heterogeneous environment based on machine-to-machine (M2M) interactions, service selection is a critical issue and the concept of social trust can be applied to service selection so that IoT devices can make the best choice for interaction. In this paper, we propose a method for evaluating the trust level of the service and for estimating the QoS of the composite service using a profile created based on social trust relationship in IoT environment. As the service selection is made through quantitative evaluation, it is expected that the result of a more reliable service combination can be obtained.

• Annual Conference of KIPS
• /
• 2013.05a
• /
• pp.743-746
• /
• 2013

사물지능통신(Machine to Machine, M2M) 기술이 부각됨에 따라, 기존의 통신에 비해 사용되는 단말의 수가 점점 증가하고 있다. 따라서 다수의 단말로부터 전송하는 데이터가 이동통신 네트워크를 이용함에 있어 트래픽이 한계상황에 도달하여 원활하지 못한 통신망 운용을 초래할 수 있다. 본 연구는 M2M 통신 시 사용하게 될 이동통신망에 대한 효율적인 자원할당에 대한 스케줄링 방안을 제시한다. 이러한 스케줄링 방안은 트래픽이 급증하게 된 네트워크 망에서 우선적으로 처리해야 될 M2M 통신의 순위를 결정짓는데 사용 될 것이며 M2M 기술이 더욱 발전하게 되어 점차 소형화 되는 사물들이 많아짐에 따라 폭증하게 될 이동통신망의 데이터 트래픽에서 여러 가지 상황을 해결하는데 도움이 될 것이다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.8 no.1
• /
• pp.18-22
• /
• 2015

The relationship of information collection and utility is relationship of man to man, but is developed object to object by information communication and control system. This paper suggests a multimedia collaboration environment based on M2M(Machine to machine). We propose a study on reliability for application QoS in distributed multimedia. When it recovers, the characteristic of this system is to use the same method to get back again it as it creates a session.