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Mobile edge caching/computing has been emerging as a promising paradigm toprovide new services (e.g., ultra-high rate, ultra-reliable, and/or low-latencycommunications) in future wireless networks. In this paper, we introduce anovel mobile edge caching network architecture that leverages the optimal jointcaching-delivering with horizontal cooperation among mobile edge nodes (MENs),namely JOCAD. Under this architecture, MENs cooperate with each other in bothcaching and delivering contents, aiming to simultaneously minimize the totalaverage delay for the mobile users and mitigate the network traffic on thebackhaul link. Extensive simulations demonstrate that the proposed solutionscan reduce the total average delay for the whole network up to 40% comparedwith the most frequency-of-access policy, and up to 25% compared with locallyoptimal caching policy (i.e., without collaboration). Furthermore, the proposedsolutions also increase the cache hit rate for the network by four times,thereby dramatically reducing the traffic load on the backhaul network.

A Novel Mobile Edge Network Architecture with Joint Caching-Delivering and Horizontal Cooperation