TIM: A Novel Quality of Service Metric for Tactile Internet

H. J.C. Kroep, V. Gokhale, A. Simha, R. R.Venkatesha Prasad, V. S. Rao

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Tactile Internet (TI) envisions communicating haptic sensory information and kinesthetic feedback over the network and is expected to transfer human skills remotely. For mission-critical TI applications, the network latency is commonly mandated to be between 1-10 ms, due to the sensitivity of human touch, and the packet delivery ratio to be 99.99999%, failing which can lead to catastrophic outcomes. However, with humans-in-the-loop, their dexterity and adaptability to varying responses to stimuli under different network conditions, measuring the performance of a TI session only with latency and packet losses are insufficient and presents an incorrect representation of the experience of the TI application. To develop an objective measure of the quality of TI sessions, we propose a framework that models TI applications as networked control systems, including humans-in-the-loop. We derive a closed-form expression for measuring the difference between the application performance in ideal and non-ideal network conditions. Based on Weber’s law of Just Noticeable Difference, we provide a metric called TIM to estimate the impact of the network on haptic feedback. We implemented TIM on multiple applications on a TI testbed to show that our approach is feasible and TIM strongly follows real subjective measurements. Further, we propose a channel compensation spring based on TIM, to alleviate the network conditions’ negative effects. We demonstrate the efficacy of the channel compensation spring in improving the user experience. We also present implementation notes for TI application developers.

Original languageEnglish
Title of host publicationICCPS 2023 - Proceedings of the 2023 ACM/IEEE 14th International Conference on Cyber-Physical Systems with CPS-IoT Week 2023
PublisherAssociation for Computing Machinery (ACM)
Pages199-208
Number of pages10
ISBN (Electronic)979-8-4007-0036-1
DOIs
Publication statusPublished - 2023
Event14th ACM/IEEE International Conference on Cyber-Physical Systems, with CPS-IoT Week 2023, ICCPS 2023 - San Antonio, United States
Duration: 9 May 202312 May 2023

Publication series

NameICCPS 2023 - Proceedings of the 2023 ACM/IEEE 14th International Conference on Cyber-Physical Systems with CPS-IoT Week 2023

Conference

Conference14th ACM/IEEE International Conference on Cyber-Physical Systems, with CPS-IoT Week 2023, ICCPS 2023
Country/TerritoryUnited States
CitySan Antonio
Period9/05/2312/05/23

Keywords

  • QoS
  • Tactile internet
  • teleoperation
  • user experience

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