Stable transmission for a cognitive-shared channel with rechargeable transmitters

In this paper, we study the maximum stable throughput region of the proposed systems using stochastic dominance technique for optimizing utilization of a cognitive shared channel. A cognitive protocol on the general multipacket reception channel model is adopted [1], [2], where the primary transmission may succeed even in the presence of secondary transmission. Thus the cognitive user can increase its throughput through not only utilizing the idle periods of the primary user also randomly accessing the channel by some probability. We also propose two system models different from the one presented in [2] that first, the secondary transmitter harvests energy for transmission, and second, both primary user (PU) and secondary user are equipped with rechargeable batteries. Then the maximum stable throughput region for the two proposed models are studied.