NCDN: A Node-Failure Resilient CDN Solution with Reinforcement Learning Optimization

Figure 3

Procedure of content retrieval. (a) An exposure layer host receives a request object from a client. The exposure layer node checks the FIB and forwards the request object to the appropriate node(s) after updating the PRT. (b) Once a data object that can satisfy the request is returned by a hidden layer node, the exposure layer host checks its PRT and sends the data object to the client.

(a)

(b)