Joint resource allocation and coordinated computation offloading for fog radio access networks

The cloud radio access network (C-RAN) and the fog computing have been recently proposed to tackle the dramatically increasing traffic demands and to provide better quality of service (QoS) to user equipment (UE). Considering the better computation capability of the cloud RAN (10 times larger than that of the fog RAN) and the lower transmission delay of the fog computing, we propose a joint resource allocation and coordinated computation offloading algorithm for the fog RAN (F-RAN), which takes the advantage of C-RAN and fog computing. Specifically, the F-RAN splits a computation task into the fog computing part and the cloud computing part. Based on the constraints of maximum transmission delay tolerance, fronthaul and backhaul capacity limits, we minimize the energy cost and obtain optimal computational resource allocation for multiple UE, transmission power allocation of each UE and the event splitting factor. Numerical results have been proposed with the comparison of existing methods.