... equivalenttothecasewheretherelaynodesandthesinknodesare randomly distributed around the source node with equal distance. It is also assumed that the relay nodes and the sink nodes are within the communication ... and the sink nodes (Dx, Dy, Dz)overhear packets and stored them in their buffe r. The packets a, b,andc are sent to Dx, Dy,andDz, respec-tively. R1sends 1 packet to Dx, and ... thispaper, we consider the following two factors: one factor is the channel state information, which can affect the perfor-mance of a system, and the other factor is how to deal* Correspondence:...