Aiming at problem that sensor nodes of wireless nano sensor networks have low processing ability and low power consumption

present a sensor nodes access scheme based on time-slot interception. Time is divided into equal-length frames. Master control node achieves frame synchronization of all the nodes in the whole network by emitting frame synchronization signal. When a data transmission request arises

sensor node look for an idle time slot to send data by listening for each time slot. This scheme eliminates control information interaction process between the master node and access nodes

which is simple and easy to realize. frame period setting is also optimized

and an anti-collision method is proposed. Simulation results show that the proposed scheme can achieve high data throughput with low collision probability.