Centralized Caching with Unequal Cache Sizes

We address centralized caching problem with unequal cache sizes. We consider a system with a server of files connected through a shared error-free link to a group of cacheenabled users where one subgroup has a larger cache size than the rest. We investigate caching schemes with uncoded cache placement which minimize the load of worst-case demands over the shared link. We propose a caching scheme which improves upon existing schemes by either having a lower worst-case load, or decreasing the complexity of the scheme while performing within 1.1 multiplicative factor suggested by our numerical simulations.