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ECDU: an edge content delivery and update framework in Mobile edge computing

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Fig. 1 Edge content update process. The detailed process is as follows: (1) a mobile user uploads a content such asother mobile users request c14 to CS1 through BS1; (2) CS1copies a copy of c14 and migrates it to CP3; (3) CP3 migrates c14 to CP2; (4) CP2 migrates c14 to CP1; (5) CP1 uploads c14 to the cloud data center; (6) c14 from CP2 through BS2; (7) the cloud data center delivers c14 to CP2; (8) CP2 provides c14 service to mobile users
Fig. 2 Example of YouTube video request. A mobile user requests a video from E. Based on the Floyd-Warshall algorithm, the shortest path from Cto E is C–A–E
Fig. 3 The cost of ECDU and CDN under different numbers of base stations and different numbers of requested content
Table 2 Comparison of features: ECDU vs. CDN

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