The invention relates to the technical field of
coal mine underground
wireless communication, in particular to a time slot distribution and
dormancy control method and
system of a low-power-consumption
wireless sensor network. The invention discloses a time slot allocation and
dormancy control method for a low-power-consumption
wireless sensor network, and the method comprises the following steps: S1, constructing a multi-hop
tree network topology which takes a gateway as a center, and determining the neighborhood relation and the optimal path of each sensing node; s2, defining
system parameters; s3, distributing native time slot numbers for all the sensing nodes; s4, distributing
relay time slot numbers for all non-
tail-end nodes, ignoring the
tail-end nodes during distribution, and adopting a distribution principle which is the same as the original time slot number in the step S3; s5, all the sensing nodes work according to rules; and S6, the common
dormancy time Tc = Tp-Nt * Ts is calculated, and Nt is the total time slot number required for completing
data transmission of the whole network. Asynchronous time slot allocation and dynamic dormancy control are adopted, and the problems of
high energy consumption, large interference and long
delay of a synchronization scheme are solved through time-sharing awakening, conflict isolation and
relay optimization.