What are the major applications of sensor network?
Sensor nodes are used for constant sensing, event ID, event detection & local control of actuators. The applications of wireless sensor networks mainly include health, military, environmental, home, & other commercial areas.
What are the reliability requirements in WSN?
As the reliability of a WSN node is composed by the reliability in series of their components, if one of them fails, the whole node fails (see Section 2.3). Each block has associated a reliability defined by the user, obtained through simulation, or defined in the software/hardware specification.
What are the challenges and list the applications of wireless sensor networks?
Challenges in such WSN include high bandwidth demand, high energy consumption, quality of service (QoS) provisioning, data processing and compressing techniques, and cross-layer design.
What is overhearing problem in wireless sensor networks?
Overhearing : occurs when a node receives a packet destined to other nodes. Usually a node in a WSN doesn’t know when to wake up to receive a packet, thus it must keep its radio ON which consumes most of the energy.
What is sensor network and its applications?
Wireless sensor networks consist of small nodes with identifying component by sensing, computation, and wireless communications infrastructure capabilities. In the future, this wide range of application areas will make sensor networks an essential part of our lives.
How does the network query for data?
Queries are typically disseminated via flooding down the routing tree. As nodes receive the query, they begin processing it. The basic programming model is data-parallel: each node runs the same query over data that it locally produces or receives from its neighbors.
What is base station in WSN?
The base stations are one or more components of the WSN with much more computational, energy and communication resources. They act as a gateway between sensor nodes and the end user as they typically forward data from the WSN on to a server.
What are the limitations of wireless sensor networks?
Following are the drawbacks or disadvantages of WSN: ➨As it is wireless in nature, it is prone to hacking by hackers. ➨It can not be used for high speed communication as it is designed for low speed applications. ➨It is expensive to build such network and hence can not be affordable by all.
Which of the following are components of sensor networks?
A wireless sensor network consists of three main components: gateways, nodes, and software.