Research and Practice of CDN Accelerating Hot Internet Content Based on OLT
Lingshan Kong, Zongze Liu, Guangyu Chen, Jing Yu, Chuan Fan · 2024
There are obvious differences between the popular network content accessed by end users covered by different OL T (Optical Line Terminal) network elements. The CDN (Content Delivery Network) network caches the popular content locally and schedules users to access it nearby through the DNS (Domain Name System) domain name system to achieve the content acceleration function. However, the traditional CDN cannot select different storage nodes according to the popularity differences of the content, and the user access scheduling can only be completed in the domain name dimension, unable to schedule different resources of the same domain name accessed by users to different node services. To solve the above problems, this paper innovatively proposes to reuse the idle board card position of the OL T device to set up a CDN logical sink node. Through the linkage of the hotspot identification algorithm and the BRAS information, it accurately judges the popular content accessed by users covered by different OL Ts, and caches the popular content to the CDN sink node. When users access, different nodes are selected according to the popularity difference of the content to provide services to users, so as to reduce the network transmission distance and improve the quality of service access for end users. Verified by the implementation in the existing network, this solution can significantly improve the hit rate and download rate of the service.