by modeling the residual energy of each relay as an energy state, the transition probabilities among states are calculated and an expression of the average network lifetime is obtained in a variable gain amplify-and-forward relay network. Optimal energy allocation techniques are presented in [@IKKI], where the effects of co-channel interference at the relays and the destination are studied. Closed-form expression for the outage probability is derived and in addition, under different global and individual energy constraints, resource allocation algorithms are provided in a multi-relay network. Finally, in [@CHIEH], a multi-user network is investigated aiming to improve the energy efficiency per user, so that relays and subcarriers are selected and allocated accordingly for each user.

This work proposes a buffer-aided successive opportunistic relaying protocol with IRI cancellation. Through the successive nature of this protocol, we aim to recover the half-duplex constraint of cooperative relaying. In contrast to other works in the literature, we consider the arising IRI and with the aid of buffers we mitigate the detrimental effect of IRI through interference cancellation, if feasible. More specifically, we propose the $\minpow$ relay selection policy that acts in conjunction with interference cancellation and adjusts the power levels required accordingly to support the 