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Fig. 1 | EURASIP Journal on Wireless Communications and Networking

Fig. 1

From: A wireless caching helper system with heterogeneous traffic and random availability

Fig. 1

An example of our system model. Caching helpers S and D can be access points with storage capabilities. Node S has a dedicated connected user D, who is randomly generating requests for non-cacheable content. At the same time, there is a mobile device U within both helpers’ proximity, which requests cached content from external resources with some probability in each time slot. Device U also has access to the data center DC through the BS, but the connection can be problematic, so it is preferred to be served by D or S, when possible. Please note that interference to the transmitters is not depicted

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