Abstract
In this paper, we investigate the interference suppression by exploiting wireless cache in relaying networks for beyond fifth-generation (B5G) communications, where multiple decode-and-forward (DF) relays equipped with wireless cache assist the data transmission from the source to the destination over cochannel interference environments. To alleviate the severe effect of interference, wireless cache at the relays can be exploited to suppress the interference. Specifically, if the requested file falls into the cache at the relays, the relays can directly send the file to the destination; otherwise, the source has to send the file to the destination through the two-hop relaying. To further enhance the system performance, several relay selection criteria are proposed to select the best relay to suppress the interference, in order to assist the data transmission. The system transmission performance is evaluated by analyzing the system outage probability via the analytical and asymptotic expressions. Finally, simulation results are demonstrated to verify the proposed studies and the merits of wireless cache in suppressing the interference.
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