A medium access control protocol with retransmission using NACK and directional antennas for broadcasting in wireless ad-hoc networks", The 5th European Wireless Conference

Abstract: To improve the throughput perfor-mance keeping high reliable broadcasting, we pro-pose an efficient Medium Access Control protocol for broadcasting in wireless ad-hoc networks with IEEE 802.11. In the proposed protocol, to reduce the number of retransmissions, a broadcast packet is retransmitted according to NACK instead of ACK. Moreover, the broadcast packet is retrans-mitted only to the area including nodes that re-quest retransmission by using directional anten-nas. By computer simulations, we show that the proposed protocol can improve throughput per-formance keeping high reliable broadcasting com-pared with the BACK protocol. Especially, the proposed protocol 2 achieves the high throughput of 6, keeping the high success rate of data packet reception of approximately 0.7. I