A Collaborative Cache Strategy in Satellite-Ground Integrated Network Based on Multiaccess Edge Computing

Algorithm 2

Input: content request tasks that obey Zipf distribution.

Output: content response and caching strategy.

1: for each requested

2:/requesting /

3:   if ()

4:      executing Algorithm 1 and response to user directly;

5:   else if ()

6:      executing Algorithm 1 and response to user via BEN;

7:   else if ()

8:      executing Algorithm 1 and response to user via UEN-m;

9:   else if ()

10:      executing Algorithm 1 and response to user via IEN;

11:    Else

12:      Requesting from source server;

13:/caching /

14:   while ()

15:   Que.delete (Minimum_Memory_Size ());

16:   end while

17:   caching in IEN with mini ();

18:   executing Algorithm 1;

19:   caching n in ;

20:   executing Algorithm 1;

21: end for

22: for each in IEN

23:   find several most popular content and transmit to BEN and SEN;

24: end for

25: broadcast content to CEN via satellite and caching in IEN;

26: executing Algorithm 1;