State-Adaptive Coded Caching for Symmetric Broadcast Channels

TL;DR

This paper introduces a state-adaptive coded caching scheme for symmetric noisy broadcast channels with unknown states during placement, improving rate or latency over standard methods by adapting to channel states learned at each transmission block.

Contribution

The paper proposes a novel state-adaptive coded caching scheme tailored for channels with unknown states, enhancing performance over existing baseline schemes.

Findings

Improved rate performance compared to baseline schemes.

Reduced decoding latency in certain channel conditions.

Effective adaptation to channel state information learned at each block.

Abstract

Coded-caching delivery is considered over a symmetric noisy broadcast channel whose state is unknown at the transmitter during the cache placement phase. In particular, the delivery phase is modeled by a state-dependent broadcast channel where the state remains constant over each transmission block and is learned by the transmitter (and the receivers) only at the beginning of each block. A state-adaptive coded caching scheme is proposed that improves either on rate or decoding latency over two baseline schemes that are based on standard coded caching.