TY - GEN
T1 - Age-of-information vs. Value-of-information scheduling for cellular networked control systems
AU - Ayan, Onur
AU - Vilgelm, Mikhail
AU - Klügel, Markus
AU - Hirche, Sandra
AU - Kellerer, Wolfgang
N1 - Publisher Copyright:
© 2019 Association for Computing Machinery.
PY - 2019/4/16
Y1 - 2019/4/16
N2 - Age-of-Information (AoI) is a recently introduced metric for network operation with sensor applications which quantifies the freshness of data. In the context of networked control systems (NCSs), we compare the worth of the AoI metric with the value-of-information (VoI) metric, which is related to the uncertainty reduction in stochastic processes. First, we show that the uncertainty propagates non-linearly over time depending on system dynamics. Next, we define the value of a new update of the process of interest as a function of AoI and system parameters of the NCSs. We use the aggregated update value as a utility for the centralized scheduling problem in a cellular NCS composed of multiple heterogeneous control loops. By conducting a simulative analysis, we show that prioritizing transmissions with higher VoI improves performance of the NCSs compared with providing fair data freshness to all sub-systems equally.
AB - Age-of-Information (AoI) is a recently introduced metric for network operation with sensor applications which quantifies the freshness of data. In the context of networked control systems (NCSs), we compare the worth of the AoI metric with the value-of-information (VoI) metric, which is related to the uncertainty reduction in stochastic processes. First, we show that the uncertainty propagates non-linearly over time depending on system dynamics. Next, we define the value of a new update of the process of interest as a function of AoI and system parameters of the NCSs. We use the aggregated update value as a utility for the centralized scheduling problem in a cellular NCS composed of multiple heterogeneous control loops. By conducting a simulative analysis, we show that prioritizing transmissions with higher VoI improves performance of the NCSs compared with providing fair data freshness to all sub-systems equally.
KW - Age-of-Information
KW - Cyber-Physical Networking
KW - Networked Control Systems
KW - Value-of-Information
UR - http://www.scopus.com/inward/record.url?scp=85066609651&partnerID=8YFLogxK
U2 - 10.1145/3302509.3311050
DO - 10.1145/3302509.3311050
M3 - Conference contribution
AN - SCOPUS:85066609651
T3 - ICCPS 2019 - Proceedings of the 2019 ACM/IEEE International Conference on Cyber-Physical Systems
SP - 109
EP - 117
BT - ICCPS 2019 - Proceedings of the 2019 ACM/IEEE International Conference on Cyber-Physical Systems
A2 - Ramachandran, Gowri Sankar
A2 - Ortiz, Jorge
PB - Association for Computing Machinery, Inc
T2 - 10th ACM/IEEE International Conference on Cyber-Physical Systems, ICCPS 2019, part of the 2019 CPS-IoT Week
Y2 - 16 April 2019 through 18 April 2019
ER -