SD-RAN-based whole network collaborative content caching management system and method

Abstract

The invention discloses an SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method. According to the SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method, a content-popularity mapping table and a wait caching / replacement list are generated through detection and content popularity statistics, and a caching decision is made according to the wait caching / replacement list, and is issued to a caching node, so that caching and update can be carried out; a real-time global caching mapping table is obtained through monitoring the caching decision; and the caching node responds to a content request and delivers corresponding content according to the content request of a user of a current cell; characteristics of limitation of content acquisition delay and the change of the popularity of different content with time and places are fully considered, and a global network view in a control layer of a software defined network is fully utilized, and therefore, the detection range of the popularity of content can be expanded; and based on whole network cooperative caching optimized content arrangement, a situation that content is repeatedly called from a remote-end content server can be avoided, and network overhead can be reduced, and user experience can be improved.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and more specifically relates to a network-wide collaborative content caching management system (Caching Management System, CMS) and method based on a software-defined access network (Software Defined-Radio Access Network, SD-RAN). Background technique [0002] Cache is a content storage technology. Based on this technology, it can effectively alleviate the capacity bottleneck of the backhaul network and avoid the problem of the same content being repeatedly called and transmitted from the remote server. In view of this, caching technology is considered to be a key technology that can significantly improve resource utilization and reduce network delay. [0003] Caching technology is to store popular content in the cache server and deploy it on the edge of the network near the user, so that the user can obtain the required information in a more flexible and efficient manner....

AI Technical Summary

Problems solved by technology

On the one hand, this kind of distributed cooperation between adjacent nodes has high complexity and long delay, which is difficult to realize in the actual system

On the other hand, since the cache nodes only cache content according to the local network state, it is impossible to obtain the globally optimal cache decision.

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