DTN network Anycast routing method based on opportunistic communication

The invention discloses a DTN network Anycast routing method based on opportunity communication, which belongs to the field of wireless communication. The method of the invention is: 1) the sending utility value u of each target group node is maintained by each node; 2) the maximum sending utility value u and the density perception measure rho of a node j meeting with a node i is obtained by the node i; 3) if the maximum sending utility value u of i is bigger than the setting threshold u, the size of u and u is compared; if u is smaller than u, the information is transmitted to j, otherwise, no transmission is carried out; 4) if u is not bigger than u, compare the density perception measure rho of i and compare rho and rho; if rho is less than rho, the information is transmitted by the node i to the node j, otherwise, no forwarding. Compared with current technology, the invention has the advantages of improving the success delivery rate of the network data, reducing the transmission delay of the data, and possibility of producing circle during the forwarding, and improving the approaching speed of information to the target node.