Optimal Resource Allocation for Energy-Efficient OFDMA Networks

Abstract EN

This paper focuses on radio resource allocation in OFDMA networks for maximizing the energy efficiency subject to the data rate requirements of users.

We propose the energy-efficient water-filling structure to obtain the closed-form optimal energy-efficient power allocation for a given subcarrier assignment.

Moreover, we establish a new sufficient condition for the optimal energy-efficient subcarrier assignment.

Based on the theoretical analysis, we develop a joint energy-efficient resource allocation (JERA) algorithm to maximize the energy efficiency.

Simulation results show that the JERA algorithm can yield optimal solution with significantly low computational complexity.