A Wireless Sensor Network (WSN) is collection of wireless sensors with limited memory, processing and energy supply. Based on application, sensors distribute in a wide geographically area in order to collect information and transmit the collected data packets toward a base station also called Sink. Due to the relatively high node density and source-to-sink communication pattern, congestion is a...

Radio Frequency Identification (RFID) and Wireless Sensor Network (WSN), also known as Ubiquitous Sensor network (USN) are two important wireless sensing technologies that have wide variety of applications and provide unlimited future potentials. RFID is used to detect presence and location of objects using radio-frequency waves and the ability to do information transfer between tagged objects ...

Wireless Sensor Network (WSN) is one of the most propitious technologies with many applications ranging from health care to tactical military applications. Although Wireless Sensor Networks have many attractive features like low cost, low complexity and low power consumption WSNs are vulnerable to Distributed Denial-ofService (DDoS) attacks due to its broadcast nature of communication and limit...

With the development of SoC technology in recent years, the ultra-low power WiFi System on SoC Chip has emerged. As a result, WiFi-based Wireless Sensor Networks come into use, especially used in Automatic Meter Reading. While because the nodes of Wireless Sensor Networks have limited energy supply, smaller storage capability and slower calculation ability, the current WiFi technology cannot be...

Wireless Sensor Networks (WSN) are highly distributed self organized systems. WSN have been deployed in various fields. Because of some hardware problems, especially with respect to energy supply and miniaturization, WSN have certain short comings. This paper focuses on various issues such as routing challenges and design issues, topology issues and Quality of Service support issues associated ...

Many physical systems, such as water/electricity distribution networks, are monitored by battery-powered Wireless Sensor Networks (WSNs). Since battery replacement of sensor nodes is generally difficult, long-term monitoring can be only achieved if the operation of the WSN nodes contributes to a long WSN lifetime. Two prominent techniques to long WSN lifetime are i) optimal sensor activation an...

The Smart Grid vision imposes a new approach towards energy supply that is more affordable, reliable and sustainable. The core of this new vision is the use of advanced technology to monitor power system dynamics in real time and identify system in stability. In order to implement strategic vision for energy management, it is possible to identify three main areas of investigation such as smart ...

Decrease in the time interval between the first node death and the last node death, due to the completion of their energy supply, is the main goal of load-balancing methods in Wireless Sensor Networks (WSN). This paper proposes a Load-Balancing Enhancement (LBE) method, in WSN. LBE method uses a mobile data collector to data gathering from sensor nodes. The mobile data collector can directly co...

The main role of WSN is to collect information from various resources and to transfer them to the destination. The important thing is to know the location of the destination, which can be obtained through localization technique in WSN. It is highly desirable to design efficient, low-cost and measurable localization mechanism for under water acoustic WSN. Mostly, in under water acoustic WSN the ...