The Capacity Region of the Broadcast Channel with Non-Signaling Assistance

Abstract:The capacity region of the $K$-user discrete memoryless broadcast channel is fully characterized when non-signaling (NS) assistance is available to the transmitter and all $K$ receivers. The NS-assisted capacity region is shown to coincide with Sato's region, i.e., the region defined by sum-rate bounds over all subsets of messages, where each bound corresponds to full cooperation among that subset of receivers under a worst-case joint channel law consistent with the marginal channels.

Information Theory (cs.IT); Quantum Physics (quant-ph)

arXiv:2607.27434 [cs.IT]

(or arXiv:2607.27434v1 [cs.IT] for this version)

https://doi.org/10.48550/arXiv.2607.27434 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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