Wireless network

systems (MEMS) and wireless networks are opening a new domain in networking history. Sensors; often called "smart dust" are low cost small tiny devices with limited coverage, low power, smaller memory sizes and low bandwidth, will play a key role in collecting and disseminating data from the fields where ordinary networks are unreachable for various environmental and strategical reasons. There have been significant contributions to overcome many weaknesses in sensor networks like coverage problems

Create and Secure a Wireless Network According to the Business Wire (2012), 61% of Americans have wireless home networks. Some of these networks may have been installed by technicians from internet service providers while others were installed by everyday consumers. Wireless networking equipment for consumer usage is manufactured to be fairly simple and user friendly to the meet the basic needs of customers. Businesses, especially those of medium to large size are more likely to use enterprise grade

INTRODUCTION A wireless sensor network (WSN) is a network consisting of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, humidity, motion or pollutants and to cooperatively pass their data through the network to a main location. The WSN is built of nodes from a few to several hundreds or even thousands, where each node is connected to one (or sometimes several) sensors. Each such sensor network node has typically

Wireless sensor network From Wikipedia, the free encyclopedia A wireless sensor network (WSN) is a computer network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, at different locations.[1] The development of wireless sensor networks was originally motivated by military applications such as battlefield surveillance. However, wireless sensor networks

A wireless sensor network (WSN) is composed of a group of small power-constrained nodes with functions of sensing and communication, which can be deployed in a huge area for the purpose of detecting or monitoring some special events and then forwarding the aggregated data to the designated data center through sink nodes or gateways. In this case, the network connectivity and the sensing coverage are two of the most fundamental problems in wireless sensor networks. Designing an optimal area coverage

Wireless sensor networks (WSNs) are presented their abilities in many vital applications such as wildlife tracking, checking heart rates of human, military applications, traffic monitoring, etc, [1]. Wireless sensors have limited resources, including limited storage, limited processing facility, and communication capability. In addition, each sensor node is powered by a battery, which has a finite size and cannot be recharged or replaced due to environmental conditions [2-5]. Actually, Sensor nodes

CHAPTER 1: INTRODUCTION Wireless Sensor Networks refers to incredibly distributed networks of small and lightweight wireless nodes with very confined capabilities, deployed in large numbers in an open environment to monitor the environmental conditions by measuring physical parameters such as temperature, pressure, humidity etc. Each and every node (sensor) has a microprocessor and a small amount of memory for sensing, signal processing and for communication purposes. Each sensor node communicates

A wireless sensor network (WSN) consists of hundreds to thousands of low-power multi-functional sensor nodes, operating in an unattended environment, and having sensing, computation and communication capabilities. The basic components [1] of a node are a sensor unit, an ADC (Analog to Digital Converter), a CPU (Central processing unit), a power unit and a OPEN ACCESS Sensors 2010, 10 10507 communication unit. Sensor nodes are micro-electro-mechanical systems [2] (MEMS) that produce a measurable response

management is one of the most important issues of any secure communication with the increasing demand for the security in wireless sensor networks (WSNs) it is important to introduce the secure and reliable key management in the WSNs.Data confidentiality and authenticity are critical in WSNs. Key management objective is to secure and keep up secure connections between sensor nodes at network formation and running stages. In this paper we proposed various key management schemes, necessity for key management

1.1 Wireless sensor network (WSN) A wireless sensor network (WSN) consists of sensing device, computation element, and communication elements that gives user the ability to measure, observe and react to particular events and phenomena in that problem field. A sensing device provides data from sensing physical characteristics such as temperature, pressure and sound etc and then transmits that data to the base station via radio either on time basis or demand basis. A wireless sensor network may contains