What is fault tolerance in wireless sensor networks?

Fault-tolerance is the ability of a network to provide a desired level of functionality without interruption even if there are faults in the network [9]. Therefore, the fault-tolerance of a network is considered to be one of the most critical issues in WSNs.

Why fault tolerance is an important requirement for WSN unlike wired sensor network?

Nodes in WSNs are prone to failure due to energy depletion, hardware failure, communication link errors, malicious attacks, and so on. Therefore, fault tolerance is one of the critical issues in WSNs. Fault tolerant routing is a critical task for sensor networks operating in dynamic environments.

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.

What is scalability in WSN?

Scalability is that increase in the number of nodes after the WSN was established. Whether or not the WSN support the expansion is a very important factor in the design of the protocol. The routing protocols consider the sensor node characteristics in the design of the protocols.

How do wireless sensor networks work?

A Wireless sensor network can be defined as a network of devices that can communicate the information gathered from a monitored field through wireless links. The data is forwarded through multiple nodes, and with a gateway, the data is connected to other networks like wireless Ethernet.

Is the limitation of a sensor node?

Disadvantages of Sensor Networks The relatively simple functioning of sensor node devices makes these networks easy to deploy, but it also makes them vulnerable to malicious security attacks, as these sensors often lack any robust security systems.

What communication is used in WSN?

Through wireless sensor networks (WSN), we can acquire the various interesting event information around sensor nodes through multihop communications. In WSN, there are two types of applications, that is, event or query based.

What is scalability in routing protocol?

Scalability is the ability of a routing protocol to perform efficiently as one or more inherent parameters of the network grow to be large in value. Typical parameters that are studied for ad hoc networks are the number of nodes (N), and the average rate of mobility(M) in m/s under various mobility models.

Which is the example of sensor node operating system?

Contiki [18], is a lightweight open source OS written in C for WSN sensor nodes. Contiki is a highly portable OS and it is build around an event-driven kernel. Contiki provides preemptive multitasking that can be used at the individual process level.

What is wireless sensor network in simple words?

Wireless Sensor Networks (WSNs) can be defined as a self-configured and infrastructure-less wireless networks to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a main location or sink where …

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