Capacity Region of Gaussian Multiple-Access Channels with Energy Harvesting and Energy Cooperation

摘要

We consider the capacity region of a $K$-user multiple access channel (MAC)with energy harvesting transmitters. Each user stores and schedules therandomly arriving energy using an energy buffer. Users can also perform energycooperation by transmitting energy to other users or receiving energy fromthem. We derive the capacity region of this channel and show that 1) thecapacity region coincides with that of a traditional $K$-user Gaussian MAC withenergy cooperation, where the average power constraints are equal to thebattery recharging rates of the energy harvesting case; 2) each rate on thecapacity region boundary can be achieved using the save-and-forward powercontrol and a fixed energy cooperation policy.