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For warehouse management, order picking is one of the most important factors since it is the most time consuming operation contributing to the overall warehouse operational cost. Moreover, if the picking congestion occurs when there are multiple order pickers, the consumed picking time will increase. Therefore, this paper presents the new routing algorithm to reduce the picking time for multiple pickers...
Visible Light Communication (VLC) Technology is the short range optical wireless communication technology using the light source such as LEDs for data transmission. The major advantage of VLC is that it causes no interference to RF-based devices and no bad effect to human body. Thus, this makes it possible to be used in intrinsically safe environment such as in a hospital. Moreover, it doesn't have...
Free Space Optics (FSO) is the technology which has robustness in transmitting a large amount of data and energy efficient. However, there are other factors to make the FSO system more efficient. One of them is the optical beam tracking. This factor will use the optical alignment mechanism to align the optical transceiver to the maximum power point. In order to maximize the power, the tracking algorithm...
Visible Light Communication (VLC) Technology is the short range optical wireless communication technology using LEDs for communication and illumination. In this paper, we propose the improvement of the repeater system for visible light communication. Not just to extend the coverage, but also to transfer file and to increase the communication speed. Our proposed repeater system is composed of hardware...
In recent years, a visible light communication (VLC) is developed rapidly. One of its application is in a hospital for avoiding electromagnetic interference (EMI). Some researchers conclude that a hospital should have less, even no, EMI, that can be produced from the use of radio frequency, such as Wi-Fi. One of instruments used in a hospital is called a posturometry. In this paper, we propose a prototype,...
Visible Light Communication (VLC) Technology is the short range optical wireless communication technology using LEDs for communication and illumination. In this paper, we propose a repeater system for visible light communication to extend the coverage. Our proposed repeater system is composed of hardware and software components. The transmitter converts text data sending from the user into light signal...
Visible light communication (VLC) has recently become popular due to its benefit of VLC. VLC can provide not only the data communication via light, but also illumination. Indoor localization using VLC is a solution to locate objects or people inside a building using visible light wave by reading the identification data from visible light tubes. However, the identification data cannot be read in the...
Free Space Optics (FSO) are going to be popular in a variety of the communications due to the higher bandwidth and data rate compared with the microwave communication systems. However, there are other factors to make the FSO system more efficient. One of them is the beam alignment. In this paper, the transponder alignment for FSO is investigated. In this paper the gradient technique, one of step track...
The simple approaches of an indoor localization have been continuously developed and extensively published. In order to achieve a challenge of the effective indoor localization, the expected localization system should be a high efficiency such as high accuracy, simple, robustness and effective system. For the indoor localization, the researches have been supported by the advancement of the sensor...
The recent research in localization technique has been supported by the emerging of wireless sensor network (WSN) technology. The issues of the estimated location accuracy have becoming the main research topics in WSN-based localization technique. In this paper, the application of WSN for localization technique using ZigBee standard is proposed. As IEEE 802.15.4 standard, ZigBee is widely used because...
ZigBee as IEEE 802.15.4 standard has been using for main research topic in the wireless sensor network (WSN) applications. The new method of radio frequency (RF) fingerprint-based technique for indoor localization is proposed. The received signal strength indicator (RSSI) is used as database values which correspond to the location of the sensor nodes. Fuzzy C-Means (FCM) clustering algorithm is applied...
The recent researches in localization technique have been supported by the emerging of wireless sensor network (WSN) technology. The issues of power and time consumption have become the main research topics in WSN-based localization technique. ZigBee as IEEE 802.15.4 is commonly used as supporting device because of its advantages for low-power, small and smart sensor nodes. This paper proposes the...
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