Active Reconfigurable Intelligent Surface for Mobile Edge Computing

This letter investigates an active reconfigurable intelligent surface (RIS)-aided mobile edge computing (MEC) system. Compared with passive RIS, the RIS is equipped reflective amplifier, which can effectively circumvent “double path loss” attenuation. We propose a joint and communication design to minimize maximum computational latency (MCL), subject both phase shift constraints capability constraints. Specifically, original problem decoupled into four subproblems, then block coordinate descent (BCD) method successive convex approximation (SCA) are applied alternately optimize subproblems. The simulation results show that same power budget, performance gain achieved by much larger than RIS.