Comparison Between TDMA and Random Multiple-Access Energy-Harvesting Networks Under Security Constraints

We study the maximum average energy transfer rate at a wireless charging energy-harvesting receiver when multiple transmitting nodes communicate their confidential information to a data receiver. We investigate both the time-division multiple-access (TDMA) and the random multiple-access (RMA) schemes and compare their performance. We address the question of which multiple-access scheme can maximize the average energy transfer rate under secrecy constraints. We also investigate the cases of the RMA scheme with equal access probabilities and the TDMA scheme with equal time-slot assignment probabilities. mymargin