Wireless sensor networks are a type of ad-hoc networks, in which the nodes are basically sensors with data sensing and communication capability. These sensors are limited powered, work autonomously and don‟t need any supervision when deployed. Hence the lifetime of the network is a very important design factor. Clustering is one of the key energy efficient techniques used to extend the lifetime...

Recent advancements in the ubiquitous sensor network field have brought considerable feasibility to the realization of a ubiquitous society. A ubiquitous sensor network will enable the cooperative gathering of environmental information or the detection of special events through a large number of spatially distributed sensor nodes. Thus far, radio frequency identification (RFID) as an applicatio...

Wireless sensor network (WSN) consists of a small size sensor nodes depends on battery power. Applications of sensor networks are street lighting, home automation, industrial plant, environmental parameters, health care and military. Security is becoming a major concept in the design of wireless sensor networks. Attacks on sensor networks include attack on confidentiality, integrity and availab...

This paper aims to design and implement an efficient service based sensor access architecture for web based interaction of sensor nodes. The future sensor networks are envisioned as comprising heterogeneous devices assisting to a large range of applications. Interoperability is required for such heterogeneous devices. To achieve this, Service Oriented approach for the data acquisition from sens...

Wireless sensor network have several constraints, such as a short transmission range, poor processing capabilities, limited available power and slow execution time. The design of algorithms for fast processing of information in sensor network is an emerging research area nowadays. However, due to unique characteristics of the sensor network computing paradigm, the objective is to design algorit...

In recent years, wireless sensor network (WSN) is finding its applications in agriculture, military, health care, environmental monitoring and industries. In wireless sensor networking energy resource of battery is very important and it has to be utilized in an efficient way. Energy resource of WSNs cannot be recharged or replaced in most of the time. So, the lifetime of the WSN is an important...

Wireless sensor networks (WSNs) have many applications in the areas of commercial, military and environmental requirements. Regarding the deployment of low cost sensor nodes with restricted energy resources, these networks face a lot of security challenges. A basic approach for preparing a secure wireless communication in WSNs, is to propose an efficient cryptographic key management protocol be...

in this paper, a new approach was presented for bus network design which took the effects of three out of four stages of the bus planning process into account. the presented model consisted of three majors steps 1- network design procedure (ndp), 2- frequency determination and assignment procedure (fdap), and 3- network evaluation procedure (nep). genetic algorithm (ga) was utilized to solve th...

Energy conserving design is the research focus to prolong the lifetime of wireless sensor networks. A simple and effective way to save energy is to place sensor nodes in sleep mode periodically. However, sleep mode corresponds to low power consumption as well as to reduced network capacity and increased latency. This paper develops an analytical framework to study the interaction between random...

In wireless sensor network (MSN), reliability is the main issue to design any routing technique. To design a comprehensive reliable wireless sensor network, it is essential to consider node failure and energy constrain as inevitable phenomena. In this paper we present energy efficient node fault diagnosis and recovery for wireless sensor networks referred as energy efficient fault tolerant mult...