  This article proposes an edge content delivery framework (ECD) based on
mobile edge computing in the era of Internet of Things (IOT), to alleviate the
load of the core network and improve the quality of experience (QoE) of mobile
users. Considering mobile devices become both the content consumers and
providers, and majority of the contents are unnecessary to be uploaded to the
cloud datacenter, at the network edge, we deploy a content server to store the
raw contents generated from the mobile users, and a cache pool to store the
contents that are frequently requested by mobile users in the ECD. The cache
pools are ranked and high ranked cache pools will store contents with higher
popularity. Furthermore, we propose edge content delivery scheme and edge
content update scheme, based on content popularity and cache pool ranking. The
content delivery scheme is to efficiently deliver contents to mobile users,
while the edge content update scheme is to mitigate the content generated by
users to appropriate cache pools based on its request frequently and cache poor
ranking. The edge content delivery is completely different from the content
delivery network and can further reduce the load on the core network. In
addition, because the top ranking cache pools are prioritized for higher
priority contents and the cache pools are prioritized for higher priority
contents and the cache pools are in proximity to the mobile users, the
immediately interactive response between mobile users and cache pools can be
achieved. A representative case study of ECD is provided and open research
issues are discussed.
