Protocols and stability analysis for energy harvesting TDMA systems with/without relaying

This paper deals with time-division multiple access (TDMA) in wireless networks with bursty data traffic and energy harvesting capabilities at the source nodes. Several TDMA-based transmission strategies that incorporate different levels of “as-sistance” for the energy-constrained sources are investigated and analyzed in terms of stable throughput. Specifically, we study the stability region for a TDMA policy with assistance of a) channel state information (CSI) at the sources, b) orthogonal relaying cooperation, c) cognitive radio relaying cooperation and d) full-duplex (FD) relaying cooperation. The transmission parameters associated with the proposed strategies are also optimized. We observe that CSI results in significant energy savings and enlarge the stability region of the network while FD cooperation, which exploits the multipacket reception characteristics of the channel, provides the best performance.