Rate –Energy Trade – off in Multiuser Scheduling Networks Under Long Range Communication Scenario

With the evolution of wireless communication technologies, the need for green communication and energy saving become more critical than ever. The lifetime of a battery-powered network usually depends on the battery capacity. RF energy harvesting is a promising technique to prolong the battery lifetime effectively. The performance of multiuser scheduling schemes for a time-slotted system with simultaneous wireless information and power transfer under Rayleigh fading channel is studied in this paper. In each time slot, one user is scheduled to receive information while the remaining users opportunistically harvest the energy. We study the tradeoff between information rate and total harvested energy for different scheduling schemes. The MATLAB simulation results show that rate-energy performance of order-based SNR scheduling is better than that of the order-based N-SNR scheduling which is better than that of the order-based Equal Throughput scheduling under long range power transfer conditions. Also the result shows that the