Throughput-Outage Scaling Laws for Wireless Single-Hop D2D Caching Networks with Physical Models

Throughput-Outage scaling laws for single-hop cache-aided device-to-device (D2D) communications have been extensively investigated under the assumption of the protocol model. However, the corresponding performance under physical models has not been explored; in particular it remains unclear whether link-level power control and scheduling can improve the asymptotic performance. This paper thus investigates the asymptotic throughput-outage tradeoff and derives its outer bound for cache-aided D2D networks under two common physical models. The results show that the asymptotic performance of the network under physical models is identical to that under the protocol model when requests are served with equal quality. This indicates that the throughput-outage performance cannot be improved asymptotically by using link-level power control and scheduling.