ERRAP: Efficient Retransmission Qos-Aware MAC Scheme for WSNs

Abstract

In this chapter, we have proposed an Efficient Retransmission Random Access Protocol (ERRAP) that retransmits a new frame within a pre-calculated time slot, which combines scheme of collision avoidance and energy management for low-cost, short-range wireless radios, and low-energy sensor applications. This scheme focuses on efficient MAC scheme to provide autonomous Quality of Service (QoS) to the sensor nodes in one-hop QoS retransmission group in WSNs. The sensor nodes join the network only during random access time. The time interval between random access period could be small. Our simulation results demonstrate the performance of ERRAP protocol which increases the delivery probability and reduces the energy consumption