We investigate the use of maximum distance separable (MDS) codes to cachepopular content to reduce the download delay of wireless content delivery. Inparticular, we consider a cellular system where devices roam in an out of acell according to a Poisson random process. Popular content is cached in alimited number of the mobile devices using an MDS code and can be downloadedfrom the mobile devices using device-to-device communication. We derive ananalytical expression for the delay incurred in downloading content from thewireless network and show that distributed caching using MDS codes candramatically reduce the download delay with respect to the scenario wherecontent is always downloaded from the base station and to the case of uncodeddistributed caching.
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