An Intelligent Caching and Replacement Strategy Based on Cache Profit Model for Space-Ground Integrated Network

Table 3

The simulation data features.

Definitions	Descriptions
Content size	1–20 (MB)
Content type	Images, text, audio, and video
Request node type	Edge, common, and central nodes
Number of historical requests	Collected by SDN
Last request interval	Counted by LEO
Content popularity	Calculated by equation (4)