Power-aware QoS routing for wireless multimedia sensor networks

Meeting quality of service(QoS) is a challenging task in Wireless Multimedia Sensor Networks(WMSNs). In this paper, a new power-aware QoS routing protocol for WMSNs is proposed, which uses local information in choosing the next hop. For real-time communication, we consider both delay at the sender node and queuing delay at the receiver, and try to reach the latency requirements by minimizing the hop counts for a packet needed to be transferred towards the sink. In order to achieve reliability requirements and energy efficiency, each node dynamically adjusts it´s transmission power and chooses nodes which have less remaining hops towards the sink. We consider the history of the packet in order to update these requirements at each hop. A load balancing approach is used to increase lifetime and avoid congestion. Simulation results shows that our protocol can support QoS with less energy consumption.