2021 Volume 10 Issue 8 Pages 593-598
This letter investigates the optimal tradeoff between user experience and communications and computation resource consumptions in designing efficient mobile edge computing (MEC) systems which are based on orthogonal frequency division multiple access (OFDMA) and operating in time division duplexing (TDD) mode. First, we establish a communication model for offloading scalable tasks in TDD-OFDMA systems. Then, we formulate the system utility maximization problem with respect to the service level selection and resource allocation. Finally, we propose two algorithms to obtain a globally optimal solution and a low-complexity suboptimal solution, respectively, using convex optimization and difference of convex (DC) programming.
