V.Indira, D. Santhi Jeslet
Many Wireless Sensor Network (WSN) applications require real -time communication. For example, a surveillance system needs to alert authorities of an intruder within a few seconds of detection. Similarly, a fire-fighter may rely on timely temperature updates to remain aware of current fire conditions. Supporting real-time communication in WSNs is very challenging. First, WSNs have loss links that are greatly affected by environmental factors in James Kay et al. As a result, communication delays are highly unpredictable. Second, many WSN applications (e.g., border surveillance) must operate for months without wired power supplies. Therefore, WSNs must meet the delay requirements at minimum energy cost. In Xia Zhenjie et al. different packets may have different delay requirements. For instance, authorities need to be notified sooner about high speed motor vehicles than slow moving pedestrians. To support such applications, a real time communication protocol must adapt its behavior based on packet deadlines .In Rodopulo et al. Due to the resource constraints of WSN platforms, a WSN protocol should introduce minimal overhead in terms of communication and energy consumption and use only a fraction of the available memory for its state. Several wireless sensor network applications ought to decide the intrinsic variance between energy efficient communication and the requirement to attain preferred quality of service (QoS) such as packet delivery ratio, delay and to reduce the power consumption of wireless sensor nodes. In order to address this challenge, we propose the Power Aware Routing Protocol (PARP), which attains application-specified communication delays at low energy cost by dynamically adapting transmission power and routing decisions. Extensive simulation results prove that the proposed PARP attains better QoS and reduced power consumption.
Power, Routing, QoS, Sensor Networks.