A superposition-coding scheme with per-layer rates achieves near-optimal, within-factor-4 delivery time for cache-aided SISO broadcast with uneven-capacity users, and full-capacity delay remains achievable when each user's capacity exceeds a closed-form threshold.
Centralized coded caching schemes: A hypergraph theoretical approach,
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Fundamental Limits of Wireless Caching under Uneven-Capacity Channels
A superposition-coding scheme with per-layer rates achieves near-optimal, within-factor-4 delivery time for cache-aided SISO broadcast with uneven-capacity users, and full-capacity delay remains achievable when each user's capacity exceeds a closed-form threshold.