  WSNs can be considered a distributed control system designed to react to
sensor information with an effective and timely action. For this reason, in
WSNs it is important to provide real-time coordination and communication to
guarantee timely execution of the right actions. In this paper a new
communication protocol RRRT to support robust real-time and reliable event data
delivery with minimum energy consumption and with congestion avoidance in WSNs
is proposed. The proposed protocol uses the fault tolerant optimal path for
data delivery. The proposed solution dynamically adjust their protocol
configurations to adapt to the heterogeneous characteristics of WSNs.
Specifically, the interactions between contention resolution and congestion
control mechanisms as well as the physical layer effects in WSNs are
investigated.
