RedFixHop: Efficient Ultra-Low-Latency Network Flooding

A Constructive Interference-based flooding mechanism - using hardware-generated ACKs - is proposed to achieve highly reliable source-to-sink communication of very short critical packets in a wireless sensor network working in harsh environments. Constructive interference is only achieved if the senders synchronize their packet transmissions with sub-microsecond accuracy. In order to achieve the required synchronization accuracy, the packet retransmissions at the relay nodes are triggered by using hardware acknowledgements.