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Anggraeni M.E.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Handayani P.,Sepuluh Nopember Institute of Technology | Hendrantoro G.,Sepuluh Nopember Institute of Technology
Proceeding - 2016 International Seminar on Intelligent Technology and Its Application, ISITIA 2016: Recent Trends in Intelligent Computational Technologies for Sustainable Energy | Year: 2016

Wireless communication offers greater mobility to users but also susceptible to disruption because of many scatterers result multipath fading. Proper knowledge about the conditions and characteristics of scatterers around communication channel is very important to evaluate the performance of communication systems. By measuring the double directional we could have knowledge about the direction of radio wave propagation. It could lead us to predict the scattering point which dissipating the radio wave. This paper reports the measurement system build on software defined radio (SDR) platforms at 2.4 GHz band and the preliminary measurement results of the MIMO channel at outdoor environment. Space Alternating Generalized Expectation-Maximization (SAGE) algorithm is used to estimate the parameters of the channel, i.e., delay, double directional (DOD and DOA), and complex amplitude of multipath component signals (MPCs) to observe scattering mechanism around MIMO communication link. The 2×2 MIMO channel measurements were performed at the courtyard of Robotics building at Institut Teknologi Sepuluh Nopember (ITS). Our measurement system use a sampling rate of 33.33 MHz, so it is only capable of separating two multipath component signals that have interval delay greater than or equal to it's delay resolution which is 60 ns. Using SAGE we estimate the parameters of MPCs. Then we verify the obtained parameters value using simple ray tracing. The results show that there are three MPCs with different delay. They are a LOS component, a signal component scattered by the surface of the ground, and a signal component scattered by Robotics building. Therefore, for this measurement we conclude that there are two scattering objects which are ITS Robotics building and the land surface. © 2016 IEEE.


Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Proceeding - 2016 International Seminar on Intelligent Technology and Its Application, ISITIA 2016: Recent Trends in Intelligent Computational Technologies for Sustainable Energy | Year: 2016

As advancement of the Internet of Thing and data centric technologies in collecting and distributing sensory data, security becomes much more important and desirable. This is because sensory data are commonly transmitted over wireless networks toward data center which are naturally easily observed for the goal of network traffic analysis. Furthermore, the collected data in data center can be easily accessed by users as well if the system does not deal with security mechanism. In this paper, we propose an anonymous authentication system using pairing-based verifier-local revocation group signature scheme to authenticate wireless nodes (i.e., sensor nodes) of a particular privilege group to the gateway node in transmitting data. In addition, an anonymous authentication for accessing data to the data center is also our achievement. © 2016 IEEE.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Nadhori I.U.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Luberski R.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Proceeding - 2014 International Conference on Computer, Control, Informatics and Its Applications: "New Challenges and Opportunities in Big Data", IC3INA 2014 | Year: 2014

Wireless Sensor Network (WSN) have emerged as an important area for research and development because of their application such as in e-healthcare monitoring system. This paper presents and discusses the performance of slotted and unslotted Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol WSN for medical system, with a few additions to the protocol and adequate tuning parameters. Performance of slotted and unslotted protocol CSMA/CA were evaluated and analyzed for different network configurations to understand the impact of protocol parameters such as Superframe Order (SO), Beacon Order (BO), Backoff Exponent (BE), and Maximum Backoff Exponent (maxBE). Network performances Quality of Service (QoS) are analyzed, namely Throughput, Power Consumption, Average Delay, and Packet Success Probability. The proposed work is implemented in Network Simulator 2 (NS2). The performance of the protocol CSMA/CA was evaluated for WSN star topology. The simulation results show that of unslotted CSMA/CA is better than slotted CSMA/CA in terms of the packet success probability, energy consumption, and delay. While slotted CSMA/CA is better than unslotted CSMA/CA in term of throughput. © 2014 IEEE.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Lee B.-H.,National Taiwan University of Science and Technology | Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Journal of ICT Research and Applications | Year: 2015

The personal area network (PAN) coordinator can assign a guaranteed time slot (GTS) to allocate a particular duration for requested devices in IEEE 802.15.4 beacon-enabled mode. The main challenge in the GTS mechanism is how to let the PAN coordinator allocate time slot duration for the devices which request a GTS. If the allocated devices use the GTS partially or the traffic pattern is not suitable, wasted bandwidth will increase, which degrades the performance of the network. In order to overcome the abovementioned problem, this paper proposes the Partitioned GTS Allocation Scheme (PEGAS) for IEEE 802.15.4 networks. PEGAS aims to decide the precise moment for the starting time, the end, and the length of the GTS allocation for requested devices taking into account the values of the superframe order, superframe duration, data packet length, and arrival data packet rate. Our simulation results showed that the proposed mechanism outperforms the IEEE 802.15.4 standard in terms of the total number of transmitted packets, throughput, energy efficiency, latency, bandwidth utilization, and contention access period (CAP) length ratio. © 2015 Published by ITB Journal Publisher.


Astawa I.G.P.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Moegiharto Y.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Briantoro H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Lecture Notes in Electrical Engineering | Year: 2016

IEEE 802.11n is considered as the current development of standard communication WLAN IEEE 802.11 providing the increase throughput relatively standard to IEEE802.11a/g. The increase of various transmission channel in the wireless communication makes the antenna receiver work harder as the noise and fading happen in the channel. A certain method is needed to predict the channel description between the transmitter and receiver for standard communication WLAN IEEE802.11n. This research does an estimated channel simulation using minimum mean square error (MMSE) method on the MIMO-OFDM system in scheme antennas 2 × 2 and 2 × 4. The rectangular shaping on the time domain is used as channel model approach. The operation of system is stated into impulse responses sent from Tx transmitter antenna to Rx receiver output from the channel estimated output. The computer simulation program shows that the estimated channel works well on the antenna schemes 2 × 2 and 2 × 4. © Springer International Publishing Switzerland 2016.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Saputra F.A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Hadi Z.S.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Fahmi A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Proceeding - IEEE COMNETSAT 2013: IEEE International Conference on Communication, Networks and Satellite | Year: 2013

One application considered for IEEE 802.15.4 standard Low Rate-Wireless Personal Area Network (LR-WPAN) is wireless sensor network and control application that is centered on the performance of IEEE 802.15.4 standard for star and cluster topology. This study conduct performance comparison of beacon-enabled mode on star and cluster topology IEEE 802.15.4 standard by analyzing the result of throughput, delay, and energy consumption in order to get the maximum result to apply the appropriate topology model as needed. We conduct analysis on each topology model by using the numbers of nodes from 10 nodes to 100 nodes to analyze throughput, delay, energy consumption, and probability success packet. The simulation results show that the lifetime node and throughput of cluster topology are higher than that of star topology. © 2013 IEEE.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Lee B.-H.,National Taiwan University of Science and Technology | Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Taufiqurrahman,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Sensors and Materials | Year: 2015

The E-health sensor is one of the technologies of the wireless body area network (WBAN), which has a wide range of sensors that can be used to check a person's health data. In this work, we implement an E-health sensor system that can be used to read health vital sign data and store it in a database server. The sensors used in this work are a body temperature sensor and a blood oxygen sensor. The method that we used enables us to show the results of the sensor readings to a desktop application, then read the printout of the series and create a visual in the form of tables and graphs, as well as store the data in a database and display the data via a website in the form of reports that can be accessed remotely. After doing some testing on the user, it can be concluded that this application can be used to access health data remotely. © 2015 MYU K.K.


Arai K.,Saga University | Harsono T.,Saga University | Harsono T.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

An agent based evacuation model with car-following parameters for micro traffic by means of cellular automata is proposed. The model features smart drivers who have a concern the distance between the driver and the surrounding cars. Such drivers are called agents. Agents lead the other cars not only in an ordinary case but also in the case of evacuations. We put the smart drivers and the agent drivers into the car-following parameters of traffic model. We applied it in the case of evacuation. Experimental simulation results show the effectiveness of reducing the evacuation time by the agents. It also is found the effectiveness increases in accordance with increasing of the number of agents. © 2010 Springer-Verlag Berlin Heidelberg.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Lee B.-H.,National Taiwan University of Science and Technology | Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
Proceeding - 2013 International Conference on Computer, Control, Informatics and Its Applications: "Recent Challenges in Computer, Control and Informatics", IC3INA 2013 | Year: 2013

In IEEE 802.15.4 beacon-enabled mode, the personal area network (PAN) coordinator can assign guaranteed time slot (GTS) to allocate a particular duration for requested devices. The main challenge in GTS mechanism is how the PAN coordinator allocates time slot duration for the devices which request GTS. However, if the allocated devices use GTS slot partially or the traffic pattern is not suitable, the wasted bandwidth will increase which make degrade the performance of network. In order to overcome the above mentioned problem, this paper proposes a partitioned GTS allocation scheme (PEGAS) for IEEE 802.15.4 networks. PEGAS aims to decide the precise time for the starting time (GTSstart), the end of GTS (GTSend), and the GTS length (GTSlength) allocation for requested devices taking into the value of superframe order (SO), length of data packet and arrival data packet rate. The simulation results show that the proposed mechanisms outperform the IEEE 802.15.4 standard in terms of total of transmitted packet, throughput, energy efficiency, and latency. © 2013 IEEE.


Al Rasyid M.U.H.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Lee B.-H.,National Taiwan University of Science and Technology | Sudarsono A.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS | Mahfud I.,Electronics Engineering Polytechnic Institute of Surabaya EEPIS
2015 IEEE International Conference on Consumer Electronics - Taiwan, ICCE-TW 2015 | Year: 2015

Wireless body area sensor network (WBASN) implements realtime health monitoring by outfitting patients with wireless vital sign sensors. This paper presents an aplication that can assist doctors / nurses to monitor any changes in the position of the patient; they do not need to see the patient directly. They can monitor the patient position at other room of the patient. This aplication can shows any changes in the patient's position in realtime. © 2015 IEEE.

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