The invention relates to the technical field of mobile communications and provides a method for selecting a safe
relay for multiple targets in a mobile
collaborative network. In the method provided by the invention, a channel
fading threshold as well as and the various states and the
state transition probability of candidate
relay nodes are determined through periodically transmitting a training sequence and feedback information; when the
fading speed of some channel is greater than the threshold, dynamic
relay selection is carried out, or else, semi-static relay selection is carried out; and during the process of relay selection, the optimal safe relay is selected to collaborate
data transmission according to the total compensation determined by a plurality of target values, such as
system safety capacity, and the like. With the adoption of the method provided by the invention, the characteristics of
wireless channels in the mobile
collaborative network can be accurately and timely described, and the dynamic selection of the optimal safe relay for the multiple targets is realized through lower complexity, so that the method has strong flexibility and expandability; and the transmission efficiency is further increased through carrying out different relay selections according to channel states.