Publication
Age of Information and Value of Information Aware Optimal Packet Transmission for an AGV System
Shreya Tayade; Hans D. Schotten (Hrsg.)
European Conference on Networks and Communications (EuCNC-2024), Age of Information and Value of Information Aware Optimal Packet Transmission for an AGV System, June 3-6, Antwerp, Belgium, IEEE, 2024.
Abstract
This paper proposes a control-aware approach to
packet transmissions for an industrial control use case. The study
focuses on an edge cloud-based Automated Guided Vehicle (AGV)
control system that operates over a correlated wireless fading
channel. AGV follows a reference track, and the control packets
are sent by an edge cloud controller periodically in the downlink.
Transmitting the control packets frequently with high reliability
ensures control system stability while also increasing resource
usage. On the contrary, resource efficiency can be increased by
transmitting control packets less frequently. However, this may
lead to instability in the control system due to a higher Age of
Information (AoI). Therefore, we have derived an optimal control
packet transmission rate. The study aimed to determine the
optimal transmit time that minimises control error and ensures
stability, taking into account the Age of Information (AoI), Value
of Information (VoI), control error, and channel conditions. The
results indicate that the channel coherence time has a significant
impact on both the optimal transmit time and the performance
of the Autonomous Guided Vehicle (AGV). In order to reduce
the frequency of transmission of control packets, it is possible to
increase the error tolerance and decrease the Value of Information
(VoI). Additionally, we assess the maximum allowable time for
transmitting control packets to ensure that the AGV’s control
error remains below a specified threshold.