OPRA: Optimal Relay Assignment for Capacity Maximization in Cooperative Networks
As promising as it is, cooperative communication has been proposed to increase the capacity of wireless networks through spatial diversity. Without requiring multiple antennas on the same device, spatial diversity is achieved by exploiting the antennas on other nodes, i.e., relay nodes, in the network. Therefore, the selection of relay nodes has a significant impact on the achieved total capacity. In this paper, the authors study the problem of relay assignment in cooperative networks, where multiple source-destination transmission pairs share the same set of relay nodes. Specifically, they propose a system model where a relay node can be shared by multiple source-destination pairs and present a corresponding formulation for the capacity calculation.