Author: Direktorat PuTI

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Abstract

In this paper, we propose the usage of Unmanned Aerial Vehicle (UAV) as a flying mobile base tower station for discovering Device-to-Device (D2D) devices in the disaster area. In a disaster area, energy consumption of both devices and network become an important constraint. Therefore, there is a need to establish wireless network communication in large area rapidly under the condition of infrastructure failure. The previous works does not calculate the energy consumption of the UAV and consider the use cases of UAV flight path for specific disaster condition, e.g. flood, earthquake, etc. The objective of this paper is to provide UAV flying paths that can adapt according to disaster condition which satisfy the UAV energy constraint. We enhance four schemes for the UAV flying paths: O-path, Rectangular path, ZigZag-path, and S-path. This enhancement reduces the flight path gap area and lead the increasing of covered area. To examine the best UAV flight path for certain disaster cases, several simulations were performed and discussed. The results show that for distributed damage pattern, the optimum UAV flying pattern is an S – path because of its large coverage area (covering around 80 percent of total devices in altitude 100 m). Otherwise, for centralized damage pattern, the optimum UAV flying patterns are O, Rectangular, and Zigzag path because of its short flight duration and less energy consumption (eight times smaller than the S – path in altitude 100 m).

Published in: 2017 IEEE International Conference on Signal and System (ICSIGSYS)

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Abstract

Millimeter-wave (mm-Wave) Massive Multiple Input Multiple Output (MIMO) at 60 GHz is a candidate of advanced wireless communications for indoor environment. MmWave massive MIMO antenna with lower frequency with sectoring technique has been proposed in previous research. Also dual polarized configuration for MIMO in lower frequency and lower number of antenna. Massive MIMO at 60 GHz mm-Wave is not evaluated yet in these previous research. In this paper, dual polarized mm-Wave massive MIMO has been proposed. Antennas are modeled in circular disk proximity coupled planar array. Bandwidth of dual polarized configuration is 4.349 GHz, wider than 4.303 GHz in single polarized configuration. Envelope Correlation Coefficient (ECC) of dual polarized configuration is 25 times lower compared to single polarized configuration. Dual polarized configuration shows better performance both in bandwidth and ECC compared to single polarized configuration.

Published in: 2017 IEEE International Conference on Signal and System (ICSIGSYS)

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Abstract

Developing countries such as Indonesia are faced with the paradox of lagging health indicators and uneven distribution of healthcare resources amidst impressive rise in mobile communications coverage. This opens up the opportunity for mHealth- the application of mobile technology for healthcare – to contribute in improving healthcare by helping alleviate the uneven distribution of resources as well as facilitating more efficient healthcare education and delivery. However, while there are many successful examples of mHealth for community health, many mHealth projects are still plagued by sustainability and scalability issues. This paper describes the development of Sahabat Bundaku (My Mother’s Best Friend), a mobile and web application that connects parents and midwives throughout the process of pregnancy and the growth of children from the womb until the child is five years old. The app provides a vehicle for the dissemination of relevant healthcare related information and education, early detection of potential problems, patient management system including reminder for important events, as well as data integration between healthcare providers and mothers. Importantly, the application is designed with extensive involvement of potential stakeholders and users to plan for both operational and financial sustainability, as well as within country dissemination.

Published in: 2016 IEEE Region 10 Conference (TENCON)

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Abstract

PALSAR (Phased Array L-Band SAR) is a kind of L-Band SAR (Synthetic Aperture Radar) with each antenna in the system is varied by its phase to improve its performance. The PALSAR works in 1.27 GHz with varying bandwidth according to specified PALSAR system. Phased shifter is used to control each antenna’s phase. Phase shifter is designed for specified frequency to reach better performance than usual phase shifter. In this paper, 5 bit digital phase shifter for L-Band SAR is designed using delay line topology and PIN diode switches. The result shows RMS error less than 2°, return loss more than 10 dB and insertion loss less than 0.8 dB.

Published in: 2015 IEEE Asia Pacific Conference on Wireless Mobile (APWiMob)

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Clustering and cooperative clustering method in D2D communication, a promising technology for 4G and 5G communication, will decrease energy consumption in mobile communication. The novelty of this work is we analyzed the impact of variation in number of mobile terminals in one cell, data transfer rate, and number of cluster members in one cluster for energy consumption. Clustering and cooperative clustering method, which are two sophisticated methods for D2D communication, are expected to make D2D communication more efficient in energy consumption. Energy efficiency of devices was examined through several simulations. The first simulation, we studied the impact of different number of mobile terminals per cell for energy efficiency. The result shows that cells with a greater number of mobile terminals has higher mobile consumption. Furthermore, compared with other cells, a cell with cooperative clustering method has less energy consumption. Secondly, we also examined the impact of different data transfer rate for devices energy consumption. The result shows that energy consumption rate is decreasing exponentially along with the increment of data transfer rate. Finally, we investigated the impact of different number of cluster members per cluster. The result informs that in the scenario with clustering method, the variation in the number of MT per cluster relatively did not affect energy consumption. However, in the scenario with cooperative clustering method, each one increment of number of mobile terminals per cluster increase energy consumption approximately by 25%.

Published in: 2015 IEEE Asia Pacific Conference on Wireless Mobile (APWiMob)

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Abstract

In this paper, the authors propose a novel Cluster Head Rotation method to spare the cluster head burden in energy consumption. The clustering method, which is a state-of-the-art approach in D2D communication, is expected to reduce the devices’ energy consumption. However, this method may induce significant energy burden for cluster head, which can bring significant disproportion in cluster head and cluster member energy consumption ratio. The authors performed several simulations to prove the eminence of Cluster Head Rotation. According to our simulation, Cluster Head Rotation achieve a better balance in energy consumption (1.25:1 for CH:CM) compared to standard clustering method (3:1 for CH:CM). Furthermore, the overall energy consumption of Cluster Head Rotation is also 75% lower than standard clustering method.

Published in: 2015 IEEE International Conference on Communication Networks and Satellite (COMNESTAT)

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