Relay selection method based on channel judgment for security cooperative networks
Qin Cai-lin · Jisuanji gongcheng yu sheji · 2015
Aiming at the information security transmission for the cooperative communication systems including eavesdrop nodes,a relay selection method based on the judgment of channel types was proposed.Probability distribution discrepancy was used to judge the type of fading channels.On this basis,a relay node for data forwarding to the destination was selected by adopting the principle of maximizing ergodic secrecy capacity.With accurate channel type information,the calculated secrecy capacity conforms to the actual situation better,which makes the performance of the relay selection more reliably.Results of the simulation indicate that,under the same conditions,the ergodic secrecy capacity of system obtained based on the proposed algorithm is 0.5Mbit-2.5 Mbit larger than that without channel judgment,the promoted secrecy capacity is significant to the improvements of system security performance.