Publication topic topic-relay type type-patent year year-before2013 [P02] Apparatus and method for bidirectional relaying in a relay wireless communication system, Samsung/KAIST, KR 10090026266, US 8315556. May 29, 2015 [P02] Apparatus and method for bidirectional relaying in a relay wireless communication system, Samsung/KAIST, KR 10090026266, US 8315556.