Internet of Things unicast data transmission method based on traffic density

The invention belongs to the technical field of wireless sensor network protocol, in particular to an Internet of Things unicast data transmission method based on traffic density. The method comprises the following steps of: calculating cost of a section according to two-way traffic density and section length information thereof on each section; combining an information source s position, a sink t position and a map to build an expander graph; obtaining a shortest path between each two nodes in a network from the expander graph; and end-to-end forwarding a unicast data packet section by section and hop by hop according to the calculated path.