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Sökning: WFRF:(Agheli Pouya)

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1.
  • Agheli, Pouya, et al. (författare)
  • Semantic Source Coding for Two Users with Heterogeneous Goals
  • 2022
  • Ingår i: 2022 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2022). - : IEEE. - 9781665435406 - 9781665435413 ; , s. 4983-4988
  • Konferensbidrag (refereegranskat)abstract
    • We study a multiuser system in which an information source provides status updates to two monitors with heterogeneous goals. Semantic filtering is first performed to select the most useful realizations for each monitor. Packets are then encoded and sent so that each monitor can timely fulfill its goal. In this regard, some realizations are important for both monitors, while every other realization is informative for only one monitor. We determine the optimal real codeword lengths assigned to the selected packet arrivals in the sense of maximizing a weighted sum of semantics-aware utility functions for the two monitors. Our analytical and numerical results provide the optimal design parameters for different arrival rates and highlight the improvement in timely status update delivery using semantic filtering and source coding.
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2.
  • Agheli, Pouya, et al. (författare)
  • Semantics-Aware Source Coding in Status Update Systems
  • 2022
  • Ingår i: 2022 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS WORKSHOPS (ICC WORKSHOPS). - : IEEE. - 9781665426718 - 9781665426725 ; , s. 169-174
  • Konferensbidrag (refereegranskat)abstract
    • 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 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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  • Resultat 1-2 av 2
Typ av publikation
konferensbidrag (2)
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refereegranskat (2)
Författare/redaktör
Pappas, Nikolaos (2)
Agheli, Pouya (2)
Kountouris, Marios (2)
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Linköpings universitet (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
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År
2022 (2)

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