Throughput-Optimal Relay Selection in Multiuser Cooperative Relaying Networks
The optimal relay selection problem in multiuser cooperative wireless networks is considered in this paper. A general discrete time model for such networks is introduced which takes into account the dynamic variations of the channel state as well as stochastic arrival of data packets into the system. The model consists of a set of mobile users, one destination node and R relay nodes which may be either mobile or fixed. The system uses the benefit of cooperative diversity by relaying in decode and forward or amplify and forward mode. The authors assume that each user either transmits its packets directly to the destination or selects a relay node to cooperatively transmit its packets.