• Proceedings of the Korean Information Science Society Conference
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• 2006.06d
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• pp.334-336
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• 2006

본 논문에서는 Zigbee Alliance의 표준에 따라 Application support sub-layer (APS)와 Zigbee device object (ZDO)를 설계하고 구현한다. 본 논문에서 구현된 Zigbee는 Zigbee Alliance의 표준안 1.0을 만족하도록 설계되었다. 본 논문에서 설계되고 구현된 APS와 ZDO를 이용하여 Zigbee 네트워크를 구성하고 운영할 수 있다.

• Journal of Advanced Navigation Technology
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• v.14 no.2
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• pp.206-212
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• 2010

In this paper, we introduce the concept of robotic zigbee network as a necessary network to provide an application service of robot in the ubiquitous environment and propose an application scenario using the concept of robot Zigbee network. We have performed experiments on the network connection and data transmission which are basic of proposed an application scenario. Through the result of the experiments, we provide basis for development of robot localization and tracking algorithm which minimizes the localization error using robot Zigbee network in the future.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.87-90
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• 2011

Smart Grid는 전기 공급자와 수요자를 이어주는 전기 네트워크를 설치하여, 전기기기와 IT기술이 융합된 형태로 사용자내에서 Bluetooth, Zigbee를 이용한 전기기기를 통제하는 효율적인 에너지 네트워크의 일종이다. 하지만 Bluetooth, Zigbee는 인증과 키관리 문제가 있어 보안의 문제가 일어날 수 있다. 본 논문에서는 스마트 그리드에서 사용될 전기IT기기를 응용하여 제어하는 Bluetooth, Zigbee의 인증과 키관리, 키 생성 프로토콜을 통한 보안성 문제를 연구한다. 또한 Bluetooth, Zigbee에 대한 키 생성 프로토콜을 연구한다. 본 연구는 Smart Grid 시스템의 보안성과 안전성을 강화하여 Smart Grid 기술 발전에 기여할 것이다.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.4
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• pp.480-485
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• 2010

In this paper, we developed mobile robot platform called Ecobot for the application system of friendly environment smart home appliance. Ecobot fulfills the purposes of monitoring of the healthy environment and guidance in the application system of friendly smart environment home appliance, home network formed by Zigbee network. For the healthy environment, the system contains monitoring sensor. Moreover, it continuously keeps the healthy environment by controlling the smart home appliances linkng with Zigbee network. And also using the URG-04LX laser distance sensor, it monitors indoor environment through autonomous moving and collision avoidance.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.379-380
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• 2007

• Journal of Digital Convergence
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• v.12 no.1
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• pp.333-338
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• 2014

Zigbee is a wireless communication technology optimized for WSN (Wireless Sensor Network) environment. A WSN gateway is used for node control and data transmission. However, a fixed-type gateway can restrict the flexibility of the WSN environment. A smartphone-mounted high-performance processor and Android OS can be easily used in a mobile WSN gateway. In this paper, we proposed a mobile WSN gateway based on Android smartphones. In the proposed system, a Zigbee sensor module is connected with a smartphone via USB (Universal Serial Bus) port. We also implemented an Android application for the mobile WSN gateway.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.4
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• pp.965-972
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• 2011

As an aged population has increased in Korea, the number of patients with chronic disease has soared up as well. The rapid increase of the chronic disease triggers a need of new paradigm of healthcare. In terms of data transmission of healthcare system, a use of data-transmission protocol based on bluetooth could be dismal in application of healthcare due to its postponement of connection. On the contrary, WPAN is evaluated to be proper to support the application of healthcare in restricted geographic areas. In addition, the bluetooth, a base of the current wireless network, doesn't support a special mechanism to cope up with emergent patients because of its delayed connection among devices. Against this backdrop, this study aims to design an integrated interface of multi bio-sensing and suggest a measuring and monitering system for the patients with chronic illnesses by using Zigbee of WPAN as a sufficient bandwidth is anticipated owing to frequent deliveries of complicated biological signals.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.12A
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• pp.1261-1269
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• 2008

This paper presents an implementation of the Network Capable Application Processor (NCAP) and the Wireless Transducer Interface Module (WTIM) architectures based on the new IEEE P1451.5 standard. Proposed architecture is implemented using a computer for NCAP, an FPGA board, a sensor board and two radio modules, which communicate through the ZigBee wireless communication technology between the NCAP and the WTIM based on the IEEE 1451.0 and the IEEE 1451.5 interfaces. In this paper, two experiments has been done to verify operations of proposed architecture. From the experimental results, we verify that the proposed architecture performs the wireless sensor communication functions efficiently.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.612-621
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• 2008

Due to the various constraints such as feasible size of data payload and low transmission power, no technical specifications on the voice communication are included in the Zigbee standard. In this paper, a voice coding technique for application to the IEEE 802.15.4 standard, which is the basis of Zigbee communication, is presented. Here, both high compression and good waveform recovery are essential. To meet those requirements, a multi-stage discrete wavelet transform (DWT) block and a binary coding block consisting of two different pulse-code modulations are exploited. Theoretical analysis and simulation results in an indoor wireless channel show that the voice coder with 2-stage DWT is most appropriate from the viewpoint of compression and waveform recovery. When the line-of-sight component is dominant, the voice coding scheme has good recovery capability even in the moderate signal-to-noise power ratios. Hence, it is considered that the presented scheme will be a technical reference for the future recommendation of voice communication exploiting Zigbee.

• Journal of Navigation and Port Research
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• v.34 no.3
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• pp.167-173
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• 2010

In order to design small printed antenna restricted within narrow area of $30mm{\times}8mm$ for the Zigbee module and improve its return loss, meander slot antenna with a floating conductor as the parastic element has been proposed. The resonant frequency and bandwidth(VSWR${\leq}$2) of the antenna designed and fabricated in the present study is about 2.44GHz and 113MHz respectively. The radiation pattern is almost similar to that of dipole antenna within the operation frequency range. Also the radiation efficiency and gain of the proposed antenna is more than 60% and 2.7dBi respectively. It has been observed that the characteristics the proposed antenna mentioned above satisfy the specification required of the Zigbee application. In order to validate the proposed antenna, some simulated and measured results are presented and compared.