  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 throughput-outage scaling laws of cache-aided
single-hop D2D networks considering a general physical channel model. By
considering the networks with and without the equal-throughput assumption, we
analyze the corresponding outer bounds and provide the achievable performance
analysis. Results show that when the equal-throughput assumption is considered,
using link-level power control and scheduling cannot improve the scaling laws.
On the other hand, when the equal-throughput assumption is not considered, we
show that the proposed double time-slot framework with appropriate link-level
power control and scheduling can significantly improve the throughput-outage
scaling laws, where the fundamental concept is to first distinguish links
according to their communication distances, and then enhance the throughput for
links with small communication distances.
