QoS based evaluation of routing protocols in WSN

The demand of electronic gadgets such as electronic tablets, mobile phones, GPS devices, and smart computing devices is gaining a lot of popularity these days. The demand for these devices has also increased as these devices have made it easy to perform everyday needs in a mobile and distributed way. With the rise in the requirement of these devices they have become cheap in cost and there has been increase in the demand for communication and networking among wireless devices. In this scenario, the evolution of the Wireless Sensor Networks (WSNs) is fundamentally towards the universality of computing devices. Nowadays sensor nodes are having the capability of sensing and performing data processing in various types of environmental conditions. These sensor nodes are usually available in small size and are cheap in cost. In WSN, the storage capabilities of sensor nodes, their transmission range and processing capabilities are limited. Also, their energy resources are limited. Routing protocols play the crucial role of maintaining the routes in the network, ensuring reliable multi-hop communication in these conditions. This paper presents the analysis of the existing routing protocols to ensure which routing protocol provides a better Quality of Service guarantee. The Quality of Service guaranteed by a routing protocol is analyzed by using different quality of service metrics namely packet delivery ratio, throughput and end to end delay. Also the energy efficiency of the protocols is taken into consideration.