Sri Listia Rosa

Application of negative selection algorithm in smart antenna system for LTE communication

Interference and multipath is one of the current issues in a wireless communication system, with complicated scenarios of environment especially in urban areas with a high number of users. Introducing smart antenna systems at the base station can contribute to reducing interference and improve quality of service. This paper proposes and explores the application of artiflcial immune system and negative selection algorithm to the prototype of smart antenna, where the proposed smart antenna is a hexagonal structure with 6-elements of the antenna array and working in LTE band at 2.6GHz. Initial testing was done to deflne the RSSI value by calculating the average of the signal then comparing RSSI value deflned by implementing artiflcial immune algorithm. To proof and determine actual RSSI signal received, a test in an anechoic chamber is conducted as reference that assumes free interference and multipath then compared to both of results. X-Bee module was used for transmitter and receiver in system at 2.4GHz band, and the proposed system prototype with hexagonal structure also used dual ARM microprocessor. Negative selection algorithm is applied in smart antenna programming to deflne actual values of receiving signal and angle of arrival. Every beam of the antenna was installed with an X-Bee module then connected to microprocessors, with an LED installed at each of the antenna as an indicator of beam switching or angle of arrival signal.

New Algorithm for Fast Processing RFID System in Container Terminal

Received Jun 2, 2015 Revised Oct 25, 2015 Accepted Nov 16, 2015 The growth of world economic and increasing of trading in most of countries has impact to the number of containers export and import between countries. Some of container terminal is very busy to handle high volume of container movement. Conventional operational procedures have difficulties to handle containers movement then make slow and some issues in terminal operation for container clearance. This paper discus on proposing new algorithm to the current container terminal management system used RFID technology for fast processing and clearance. Container Terminal Management System (CTMS) is a system for port management and interface to the RFID system that used to identify container e-seal, truck and driver identity. Lack of communication and interfacing protocol made slow response during request or reply of message to the gate operator. Proposed algorithm with new procedure of request to CTMS made faster response and avoid inaccuracy of detecting container e-seal. Results of implementation new algorithm have improved to the productivity and efficiency of container terminal. Testing and implementation of this proposed system conducted in a private container terminal in Malaysia. Keyword:

Intelligent system in container terminal for speed-up handling process

The growth of economic in some country especially in developing country has impact to movement of goods to deliver or export/import. Most of the movement is using container either land or sea transport. This research presents an intelligent system of Information and Communication Technology (ICT) in a container terminal for speed up handling process then more container to serve. A new business process is proposed for a container management system operational flow. The intelligent system used a technology which is Radio Frequency Identification (RFID) incorporated to ICT for the purpose of identifying driver, vehicle, e-seal, and container number. The RFID middleware as the key point manages all the information between Gate Checker (GC) and Container Terminal Management System (CTMS), as well as RFID reader. Middleware receives information requested by GC from reader and is then verified by CTMS database. A new technique for RFID tag filtering and a novel algorithm are introduced for effective processing and communication between CTMS and GC. The proposed system was tested at receiving station of a private container terminal to check the performance. The clearance time reduce significantly compare to previous process, before is 248.1 second per container in average to become 57 second per container.

Abnormal internet usage detection in LAN Islamic University of Riau Indonesia

Increasing internet network traffic in a Local Area Network (LAN) will impact to internet access performance. Abnormal internet traffic monitoring system is very important to detect anomaly usage of internet bandwidth. In Islamic University of Riau (UIR) one of the issue related internet usage and normal method is by tapping a monitoring computer to the main terminal of LAN or source of internet provider. This research proposes a new method of monitoring system that gives detail information by using traffic behavior method and history of traffic connected, whereas detail information of internet bandwidth used is monitored for analysis. In this research case location is in Islamic University if Riau, Indonesia campus LAN area. Results shows graph of monitoring in day time because of student activities only in that time, various website and link access by students and staff in the campus be able to captured including duration with specific time. This method gives continues and accurate data to capture anomaly data use including Internet Protocol (IP) address of computer or device connected. The system help operator to give report related to internet usage and user who connected as well as data used in automatic system.