title: Modified Dynamic Decode-and-Forward Relaying Protocol for Type II Relay in LTE-Advanced and Beyond.
abstract: In this paper, we propose a modified dynamic decode-and-forward (MoDDF) relaying protocol to meet the critical requirements for user equipment (UE) relays in next-generation cellular systems (e.g., LTE-Advanced and beyond). The proposed MoDDF realizes the fast jump-in relaying and the sequential decoding with an application of random codeset to encoding and re-encoding process at the source and the multiple UE relays, respectively. A subframe-by-subframe decoding based on the accumulated (or buffered) messages is employed to achieve energy, information, or mixed combining. Finally, possible early termination of decoding at the end user can lead to the higher spectral efficiency and more energy saving by reducing the frequency of redundant subframe transmission and decoding. These attractive features eliminate the need of directly exchanging control messages between multiple UE relays and the end user, which is an important prerequisite for the practical UE relay deployment.
authors.affiliation: Department of Electronics Engineering, Hanyang University, Seoul, Korea.
authors.forename: Sung Sik
authors.initials: SS
authors.lastname: Nam
authors.affiliation: Department of Electrical Engineering, KAUST, Thuwal, Makkah Province, Saudi Arabia.
authors.forename: Mohamed-Slim
authors.initials: MS
authors.lastname: Alouini
authors.affiliation: Department of Information and Communication Engineering, Wonkwang University, Jeonbuk, Korea.
authors.forename: Seyeong
authors.initials: S
authors.lastname: Choi
mesh_terms: D000465:Algorithms; D040421:Cell Phone; D003195:Computer Communication Networks; D008962:Models, Theoretical; D059015:Wireless Technology