• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.45 no.6
• /
• pp.1-10
• /
• 2008

Health medical service is passes with u-Healthcare and it promote health medical service environment change to the citizen center in the hospital center, and all methods of diagnosis, treatment, after management are forecasted in prevention because a balance develops. It is necessary for an u-Healthcare terminal is devoted to becoming an ubiquitous terminal of consciousness when in where and the following technology to result in implementation. Information communication equipment and an appliance technical data transfer technology Precision and how mobile gateway implementation, Bluetooth wireless appliance function is various with mobile communication and radio communication network and an appliance function are necessary. therefore, in this paper, we did a study on the implementation of bio signal measuring system for the u-healthcare based on mobile.

• Journal of Biomedical Engineering Research
• /
• v.27 no.4
• /
• pp.197-202
• /
• 2006

Devices in current market to perform electrical stimulation therapy of the urinary incontinence frequent in aging women are very much impractical to us ε due to the wired configuration. The present study implemented new wireless device to enhance self as well as in-hospital therapy with the easiest and the most convenient application. The therapy system consisted of two modules, called 'master' and 'slave', communicating with each other by the wireless Bluetooth protocol. The patient controls therapy processes on the master module in hand, transmitting the required informations to operate the slave module placed within her pants with the viginal electrode connected, delivering appropriate electrical stimulation. Wireless communication enabled self therapy with clothes on, leading to a great convenience for the patient. The stimulation output signal was comparable to commercialized products in both waveform and stimulation capacity.

• Journal of Advanced Navigation Technology
• /
• v.11 no.3
• /
• pp.281-287
• /
• 2007

The Bluetooth technology represents an attractive approach to enable short distance wireless connectivity. The Bluetooth standard operates at the 2.4 GHz ISM band and offers the advantage of establishing ad hoc networks, called piconet and scatternet. The spread of Bluetooth implementation in consumer products opens up a new short range wireless networking applications. Bluetooth MAC avoids packet collision within a piconet by simple time multiplexing. But lack of synchronization among independent neighboring piconets introduces packet overlapping within a time slot. In this paper, the wireless network throughput of Bluetooth packet transmission system applying the pure-ALOHA and slotted-ALOHA MAC is investigated according to the impact of channel environment. From the obtained results, the throughput of the Bluetooth MAC protocol shown to offer good performance in wireless channel, and the results are useful for the implementation of Bluetooth networks.

• Journal of Digital Contents Society
• /
• v.19 no.5
• /
• pp.963-969
• /
• 2018

Wi-Fi and Bluetooth technologies are perhaps the most prominent examples of wireless communication technologies used in the Internet of Things (IoT) environment. Compared to widely used Wi-Fi, Bluetooth technology has some flaws including 1:1 connection (one-way) between Master and Slave, slow transmission, and limited connection range; Bluetooth is mainly used for connecting audio devices. Since the release of Bluetooth Low Energy (BLE), some of the flaws of Bluetooth technology have been improved but it still failed to become a competitive alternative of Wi-Fi. This paper presents a method of data transmission through broadcasting in BLE and demonstrates its performance, one-to-many data transfer result. The Connection-Free Data Transmission proposed in this paper will hopefully be utilized in special circumstances requiring 1:N data transmission or disaster security network.

• Proceedings of the IEEK Conference
• /
• 2004.06a
• /
• pp.245-248
• /
• 2004

In the simple application programs, when the Bluetooth system is used, main packet, which is transmitted or many overheads, which depend on processing between every level, lead to superfluous outlay of resource area. It is shown in this paper, that all layers of bluetooth system are not used. And, it uses up to HCI layer which it is supported to make a connection between bluetooth and host device(ex. PC, PDA, etc$\ldots$), should be used levels up to HCI layer. Therefore, it is able to transfer every part of data what should be transmitted.

• 제어로봇시스템학회:학술대회논문집
• /
• 2005.06a
• /
• pp.778-781
• /
• 2005

In this paper, we describe a development of a Bluetooth Access Point for the WAN connection of home network devices. Especially, users can access the PSTN at home instead of expensive digital cellular network through the AP, using the 'one-phone', which is the Bluetooth enabled cellular phone. The simultaneous benchmark test about telephone service and LAN access service shows the perfect compatibility and reasonable performance of the access point. The one-phone service can become a convergence of wired and wireless communication through the AP.

• Journal of Industrial Technology
• /
• v.28 no.B
• /
• pp.245-250
• /
• 2008

Recently, mobile devices have supported wireless LAN as well as bluetooth, where the services such as heterogeneous network access and seamless mobility connection are important. Even though the mobility and physical network might be varied, an efficient communication mechanism for the network access and a robust mobility management of mobile devices are needed. In this paper, we design and implement a Bluetooth system with mobile LAN access capability. The proposed system has the following features; 1) IP connection is enabled by BENP in the link layer, 2) The networks devices of heterogeneous mobile devices are integrated into a single virtual network interface, 3) IP mobility between the bluetooth and wireless LAN is supported by mobile IP. The experimented results show that the packet loss and delay time during the handover duration is reduced by predicting the handover among different networks followed by the setup of any required parameters in advance.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.10a
• /
• pp.73-75
• /
• 2010

In this paper, using Android's Bluetooth module in order to develop a kiosk PC for Bluetooth communication between the Android framework is developed. Existing kiosk using a touch-screen kiosks for single occupancy were used by single users. However, the kiosks offer a single kiosk for multiple users to access and has the advantage that you can use.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.9 no.3
• /
• pp.487-492
• /
• 2005

As the portable medical equipments consume the power and transmission of the information, they need the system to use long. Although the current wireless transform systems for medical equipments use Bluetooth protocol system, an electricity consumption is big because it uses long and there is the difficulty in the utility We designed a module using the Zigbee protocol which an electricity consumption is more small though a transmission speed is slower than Bluetooth and drew the plan the wireless transmit system for medical equipments to use long.

• Journal of information and communication convergence engineering
• /
• v.7 no.3
• /
• pp.399-403
• /
• 2009

In IEEE 802.15.1 (Bluetooth) Ad-hoc networks, the frequency is resolved by the specific part of the digits of the Device clock and the Bluetooth address of the Master device in a given piconet. The piconet performs a fast frequency hopping scheme over 79 carriers of 1-MHz bandwidth. Since there is no coordination between different piconets, packet collisions may occur if two piconets are located near one another. In this paper, we proposed a software/hardware co-design of an adaptive frequency decision mechanism so that more than two different kinds of wireless devices can stay connected without frequency collision. Suggested method was implemented with C program and HDL (Hardware Description Language) and automatically synthesized and laid out. The adaptive frequency hopping circuit was implemented in a prototype and showed its operation at 24MHz correctly.