Abstract
As a concept to enhance and extend cloud-computing capabilities, edge computing aims to provide Internet-based services in the close proximity to users by placing IT infrastructures at the network edge in forms of tiny datacenters. Taking advantage of the close distance to end user and access networks, edge datacenters can provide low-latency and context-aware services and further improve users' quality of experience. As the network edge is a geographically spread concept, the edge datacenters are usually highly distributed so that they can provide nearby storage and processing capabilities to most of the end users. Furthermore, edge datacenters also co-work with centralized cloud datacenters for service orchestration. Such decentralization and collaboration are expected to introduce significant transformations to both infrastructures and applications. To provide an overview of how edge can be integrated with cloud-computing and how edge computing can benefit applications, this paper studies the infrastructure and application issues of edge computing and networking in several sub-aspects, including related concepts, infrastructures, resource management and virtualization, performance, and applications.
Highlights
The success and rapid adoption of cloud computing is creating new business opportunities; it is posing complex technical challenges to the Information Technology (IT) industry
To deal with these challenges, edge computing was introduced as a supplemental paradigm for cloud computing, in which data, The associate editor coordinating the review of this manuscript and approving it for publication was Mingjun Dai
Located at the place that is closer to users, edge computing provides an intermediate anchor between the users and cloud, and extends cloud-computing capabilities to the network edge
Summary
The success and rapid adoption of cloud computing is creating new business opportunities; it is posing complex technical challenges to the Information Technology (IT) industry. The traditional cloud computing architecture, which is usually composed of only a few large data centers interconnected by long distance networks, is being challenged by these new emerging applications, as these centralized Data-Centers (DCs) are usually far away from end users and cannot provide ultra-low latency and high bandwidth connectivity. The presence of distributed IT resources at network edge will introduce transformations to the infrastructures in traditional cloud-computing DCs. Second, the computing capability that is provided by edge DCs can enable more edge-based service paradigms. Since edge computing can provide computing capability, and storage at network edge, Ref [4] studied computation offloading and cloud-edge cooperation issues from a caching perspective It studied the research progress on content popularity, caching policies, scheduling, and mobility management.
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