Wireless Sensor Network

Abstract—Wireless Sensor Network (WSN) is basically a wireless network in which sensor nodes are distributed in any environment condition, to collect the data or information such as temperature, pressure, wind, sea level etc. and accordingly data or information will be passed to the main location. Reliable Trust and Reputation of a node stands for the measure of trust over a certain period of time which can be useful to evaluate the risk of attack from that particular node. We have combined all these parameters in order to risk of attack from a particular node.

Network nodes can have logical or actual communication with all devices,this communication mostly defines the type of network topology, depending on the application. Sensors are able to be pair with all the topologies types but, in some cases, the sensors may not be appropriate for all the networks. Most logical network topology tends to be defined depending on their logical roles. Centralized configuration techniques are always appropriate for networks whereby the processing power capacity specifically depends on a specific but unique device. The device is responsible for coordination, processing, and management of any information activities that is sensed within the environment. From here, it forwards the grasped information to a sink node. This, therefore, means that the sensors are quite reliable in grasping information (Karl, Holger, and Willig 2005, 105). The advantage of this network arrangement is the centralized configuration allows more energy management and roaming is usually allowed inside the network to facilitate

Wireless networking or atleast the networks in which we operate normally refers to wireless sensor networks which is an innovative and are within the broad spectrum of whites networks that are specifically designed to measure a small amounts of data and that data is related to sensor data. The little pieces of information like temperature sensors or open/close sensor are extremely valuable information as it provides insights into defense that might happen in their business processes. There are many wireless network, but the question arises is where do these wireless sensor network fit among the different wireless network.

A sensor network is capable of processing, sensing and communicating which helps the base station or command node to observe and react according to the condition in a particular environment (physical, battle field, biological).

Although wireless sensor network and the other types of network sometimes need same security requirements, providing security service for WSN own more challenges

Fig.2. shows the overall architecture of the proposed work. In wireless sensor networks, the sensor nodes are densely deployed in the

There are generally 2 types of architectures in WSNs. (i) Hierarchical and (ii) Distributed. In a Hierarchical WSN, A base station is a gateway to another network with some other base station to a data processing and storage center, or a human interface node point. Base point takes data from sensors send it to processing unit and that data is sent to the human interface node point. Therefore, base stations are used as key distribution centers as they are connected every other node in network. Sensor nodes form a dense network in form of clusters where a cluster of sensors lying in a specific area may provide similar or close readings of data. Not all node gets the power from power unit few sensor nodes depend on the ad hoc communication to reach base stations.

Another one is an integrated RISC microprocessor with serial analog to digital (A/D) and digital to analog (D/A) converters that interface various signals coming from the sensors to a PC. An alternate to this system is to use a reconfigurable embedded control and acquisition system, i.e. Compact-Rio whose rugged hardware architecture includes I/O modules, a reconfigurable FPGA chassis, and an embedded controller [12]. But in all such technologies the major problem which persists is their inflexibility and bulkiness. Size, weight. Being a wired system the range of communication is limited. The need of the hour is to use a wireless system for communicating between sensors and server. WSN appears as a key solution to this problem.

WSN can be applied to many other fields such as habitat monitoring, environment monitoring, smarthome, intelligent transportation and so on.

Wireless sensor nodes consists of three pars first one is wireless means without wires second one is sensor mean our nodes or data sensing process third and last one is networks means connection of these nodes to form a network to communicate and report data. When we concern its quality of service it may become too wide part of research so we are promised to work only in energy efficient protocols. The reason behind wireless

Wireless Sensor Networks are formed by autonomous nodes containing partial memory, better range of communication, power and capable bandwidth. WSN are used to inspect the corporal and environmental conditions through a system and perform data processing. However, during data acquisition different types of issues and circumstances are to be resolved.

Energy Consumption: Sensor Nodes are subject to battery power. Sensor networks are set on hostile situations so supplanting the battery is unfeasible. Consequently energy preservation and administration is a basic issue to determine in wireless sensor network.

nowadays sensors are anywhere. We take it for granted, however there are sensors in our cars, in our clever telephones, in factories controlling CO2 emissions, and even inside the ground tracking soil conditions in vineyards. while evidently sensors were around for a while, research on wireless sensor networks (WSNs) commenced returned within the Eighties and it's miles only in view that 2001 that WSNs generated an elevated hobby from commercial and research perspectives. This is due to the supply of less expensive, low powered miniature additives like processors, radios and sensors that have been regularly included on a unmarried chip (system on a chip (SoC)).

A wireless sensor network (WSN) is a network of nodes that sense and control the environment providing interaction between the machines and the surrounding environment. It is formed by large number of sensors nodes where each node is equipped with sensor to detect physical characteristic such as temperature, pressure, weight etc. [2]. WSN is a new revolutionary method which gathers information from sensor nodes providing a reliable and efficient network. With the growing technology of sensors, WSNs will become the key for internet of things. The current focus of sensor network is mainly on networking technology comprising of dynamic environment and the sensor nodes. The new research program of SenseIT provided the sensor networking with new capabilities such

The wireless sensor networks mainly comprise stationary and mobile sensors that are deployed randomly inside the network and they collect data from the surroundings via wireless communication links [7, 8].