Optimal Resources Allocation of Bidirectional Relay Communication

Energy-efficiency maximization bidirectional direct and relay transmission

“…In DT, there are two source nodes S 1 and S 2 . In RT, there is also a relay node R except for two source Table 1 Existing literature comparison with this paper Optimal transmit power (OTP) [15][16], [19][20][21][22][23], [25][26][27][28], this paper…”

“…Optimal transmit time (OTT) [19][20], [22][23], [27][28], this paper Circuit power (CP) consumption [15][16], [20][21][22][23], [26][27][28], this paper…”

“…Optimal relay position (ORP) [17], [27], [29][30] nodes S 1 and S 2 . At the same time, the relay node R lies between two source nodes S 1 and S 2 .…”

“…Actually, consideration of DLs that are existed in RT can achieve further SE performance gain, and some works have been done on it. For example, cellular communication scenario involving the coexistence of one-hop DT and two-hop relaying has been studied in [24], optimal source and relay design for multiuser MIMO AF relay communication system with DLs and imperfect channel state information (CSI) has been investigated in [25], EE optimization for a twohop AF relay network with DLs over Rayleigh fading channels has been considered in [26], RT considering DLs and aiming at maximizing EE has been discussed in [27], and the optimization for energy-efficient FD transmissions with DLs has been studied in our recent work [28]. As for the comparisons between the half-duplex and FD technique of the related works, they have been given in [28].…”

“…As for the comparisons between the half-duplex and FD technique of the related works, they have been given in [28]. It has been shown that the FD technique can increase the SE and EE of the system, but only the minimizing total energy consumption (TEC) case has been discussed in [27,28].…”