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Communication Dans Un Congrès Année : 2022

Semantics-Aware Source Coding in Status Update Systems

Marios Kountouris

Résumé

We consider a communication system in which the destination receives status updates from an information source that observes a physical process. The transmitter performs semantics-empowered filtering as a means to send only the most "important" samples to the receiver in a timely manner. As a first step, we explore a simple policy where the transmitter selects to encode only a fraction of the least frequent realizations of the observed random phenomenon, treating the remaining ones as not informative. For this timely source coding problem, we derive the optimal codeword lengths in the sense of maximizing a semantics-aware utility function and minimizing a quadratic average length cost. Our numerical results show the optimal number of updates to transmit for different arrival rates and encoding costs and corroborate that semantic filtering results in higher performance in terms of timely delivery of important updates.
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Dates et versions

hal-04093058 , version 1 (09-05-2023)

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Pouya Agheli, Nikolaos Pappas, Marios Kountouris. Semantics-Aware Source Coding in Status Update Systems. ICC 2022, IEEE 1st International Workshop on Semantic Communications, 16-20 May 2022, Seoul, South Korea, IEEE, May 2022, Seoul, South Korea. pp.169-174, ⟨10.1109/ICCWorkshops53468.2022.9814691⟩. ⟨hal-04093058⟩

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