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This article introduces a Green Cloudlet Network (GCN) architecture in thecontext of mobile cloud computing. The proposed architecture is aimed atproviding seamless and low End-to-End (E2E) delay between a User Equipment (UE)and its Avatar (its software clone) in the cloudlets to facilitate theapplication workloads offloading process. Furthermore, Software DefineNetworking (SDN) based core network is introduced in the GCN architecture byreplacing the traditional Evolved Packet Core (EPC) in the LTE network in orderto provide efficient communications connections between different end points.Cloudlet Network File System (CNFS) is designed based on the proposedarchitecture in order to protect Avatars' dataset against hardware failure andimprove the Avatars' performance in terms of data access latency. Moreover,green energy supplement is proposed in the architecture in order to reduce theextra Operational Expenditure (OPEX) and CO2 footprint incurred by running thedistributed cloudlets. Owing to the temporal and spatial dynamics of both thegreen energy generation and energy demands of Green Cloudlet Systems (GCSs),designing an optimal green energy management strategy based on thecharacteristics of the green energy generation and the energy demands of eNBsand cloudlets to minimize the on-grid energy consumption is critical to thecloudlet provider.

Green Cloudlet Network: A Distributed Green Mobile Cloud Network