CDN Offloading with Opportunistic Fog Computing Nodes

Content delivery service based on the fog computing node (FN) has been researched a lot to provide low service latency and efficient network resource utilization. However, overload on FN can occur when there are lots of service requests within the same area and short period. To solve the problem, this paper utilizes the opportunistic FN (OFN) to distribute the load of FN. The proposed scheme enables the service migration when OFN is available although the service starts with FN, which can provide the service continuity as well as the load distribution of FN.