Abstract
The Wireless Sensor Network (WSN) is an emerging field of wireless network comprising of few to many autonomous tiny sensors nodes, with limited processing, limited memory, limited battery power, limited bandwidth and limited wireless transmission capabilities. The life time of the sensor node depends upon the battery power. WSN are commonly used to monitor environmental conditions like temperature, sound and pressure etc. WSN is an application of MANET. Wireless sensor node collects data and sends back to the sink or Base Station (BS). Data transmission is normally multi-hop among sensor nodes that enable these nodes to transmit data from hop to hop towards the sink or BS. Wireless sensor network requires robust and energy efficient communication protocols to minimize the energy consumption as much as possible. Main penalty area of researchers is to design the energy efficient routing protocol. Routing protocols should be energy efficient, scalable and prolong the network lifetime.But Quality of Service QoS is also a challenge for energy efficient routing protocols for researchers. QoSneeds a multi-layerlinespanning using the different layer protocol architecture. In this paper, we enlighten the energy efficient routing towards QoS in WSNs and proposes a solutionfor the QoS layer in energy efficient routing techniques in WSNs and finally, highlight some open problems and future direction of research for given that QoS in WSNs.
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