Effect of User Mobility on the Performance of Device-to-Device Networks with Distributed Caching

Understand

We consider a distributed caching device-to-device (D2D) network in which a user's file of interest is cached as several portions in the storage of other devices in the network.

• Assuming that the user needs to obtain all these file portions, the portions cached farther away naturally become the performance bottleneck.
• This is due to the fact that dominant interferers may be closer to the receiver than the serving device.
• Using a simple stochastic geometry model, we concretely demonstrate that this bottleneck can be loosened if the users are mobile.