Joint Interference Cancellation in Cache- and SIC-Enabled Networks

We consider a cache- and SIC-enabled wireless network where the locations of the base stations (BSs) and users are modeled by the Poisson point process (PPP) and Poisson cluster process, respectively. The BS serves two users simultaneously by transmitting a superimposed signal and each user employs a joint scheme of cache-assisted interference cancellation (CAIC) and successive interference cancellation (SIC). Each user is classified as a caching or non-caching user depending on whether or not it caches data sent to its interferer in the same cell. The receiver operation of each user is classified into three possible cases: CAIC only, both CAIC and SIC, and SIC only. Then the successful packet transmission probabilities of the caching and non-caching users are derived, based on which the spectral efficiency (SE) are obtained. The power allocation problems are further formulated to maximize the SE, which prove to be convex.

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