Abstract
In this paper we propose a MAC to suport QoS(Quality of Service) and to enhance the transmission throughput in Wireless Sensor Networks (WSNs). In the proposed QEMAC (QoS and Throughput Enhancement MAC) protocol, sender nodes send transmission request (TR) packets with QoS requirements and amounts of data to be transmitted to the receiver nodes using CSMA/CA MAC protocol. And the receiver node assigns slots according to the packet priority, network topology, and the amount of traffics using TDMA. And using flexible frame size, packet collision probability can be decreased and packet transmission delay can be reduced. Using QEMAC we get the enhanced throughput and QoS support by lowering the duplicated slot assignment.
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