State-Aware Resource Allocation for Wireless Closed-Loop Control Systems

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

Wireless closed-loop control is of major significance for future industrial manufacturing. However, control applications pose stringent quality of service requirements for reliable operation. Contrary to traditional ultra-reliable low-latency communications design goals such as low packet loss rates and low latency, research results in the domain of networked control systems (NCS) state that depending on the sampling period, control applications inherently tolerate a few consecutive packet losses. This translates into a better-suited metric to capture control application requirements and therefore a more conclusive design goal for wireless networks: ensuring a maximum age of information (AoI). With a Markov modeling approach, we propose to exploit the tolerance through a novel dynamic multi-connectivity scheme that we term state-aware resource allocation (SARA), which temporally negatively correlates packet losses, thus avoiding long packet loss sequences. Through statistical multiplexing, SARA enables a mean time to failure (MTTF) in the order of years while keeping the per-agent average channel usage close to one, also in a multi-agent setting with competition for resources. Compared with static dual-connectivity, the MTTF can be increased 100-fold whereas the number of required channels reduces by 40%. Our approach also statistically guarantees system-wide AoI distributions, which aid to ensure control performance.

Details

Original languageEnglish
Article number9478879
Pages (from-to)6604-6619
Number of pages16
JournalIEEE Transactions on Communications
Volume69
Issue number10
Early online date9 Jul 2021
Publication statusPublished - 1 Oct 2021
Peer-reviewedYes

External IDs

Scopus 85117315450
ORCID /0000-0002-0738-556X/work/197320471

Keywords

Keywords

  • 5G mobile communication, Optimal scheduling, Packet loss, Real-time systems, Resource management, Ultra reliable low latency communication, Wireless communication