Dedicated Restricted Target Wake Time for Real-Time Applications in Wi-Fi 7 (2402.15900v1)
Abstract: Real-time applications (RTA) tend to play a crucial role in people's everyday life. Such applications are among the key use cases for the next generations of wireless technologies. RTA applications are characterized by strict guaranteed delay requirements (in the order of a few milliseconds). One of the pillars of enabling RTA in next-generation Wi-Fi standards is Restricted Target Wake Time (R-TWT), which provides Wi-Fi stations exclusive channel access within negotiated service periods (SPs). If each RTA data flow uses dedicated SPs for data transmission, they are completely isolated from each other and do not experience any contention. To ensure the satisfaction of RTA QoS requirements while minimizing the channel airtime consumption, it is important to properly select the R-TWT parameters, namely the duration of SPs and the period between SPs. In this paper, we develop a mathematical model that estimates the delay probability distribution and packet loss probability for a given set of network, traffic and R-TWT parameters. Using this model, the access point can select the optimal R-TWT parameters for the given QoS requirements. The high accuracy of the model is proven by means of simulation.
- IEEE 802.11 Real Time Applications TIG Report.
- E. Khorov et al., “Current Status and Directions of IEEE 802.11 be, the Future Wi-Fi 7,” IEEE Access, vol. 8, pp. 88 664–88 688, 2020.
- “IEEE P802.11be/D2.1, Draft Standard for Information Technology.”
- L. Tian et al., “Wi-Fi HaLow for the Internet of Things: An Up-to-Date Survey on IEEE 802.11 ah Research,” J. Netw. Comput. Appl., 2021.
- M. Nurchis et al., “Target wake time: Scheduled Access in IEEE 802.11 ax WLANs,” IEEE Wirel. Commun., vol. 26, no. 2, pp. 142–150, 2019.
- S. K. Memon et al., “A Survey on 802.11 MAC Industrial Standards, Architecture, Security & Supporting Emergency Traffic: Future Directions,” J. Ind. Inf. Integr., vol. 24, p. 100225, 2021.
- P. H. Isolani et al., “Support for 5G Mission-Critical Applications in Software-Defined IEEE 802.11 Networks,” Sensors, vol. 21, 2021.
- M. Richart et al., “Slicing with Guaranteed Quality of Service in WiFi Networks,” IEEE Trans. Netw. Service Manag., vol. 17, no. 3, 2020.
- K. Chemrov et al., “Smart Preliminary Channel Access to Support Real-Time Traffic in Wi-Fi Networks,” Fut. Int., vol. 14, no. 10, p. 296, 2022.
- W. Xia et al., “Hybrid Channel Access Towards Real-Time Applications in Healthcare,” in Proc. of IEEE ICC WS21, 2023, pp. 1932–1937.
- H. Yang et al., “On Energy Saving in IEEE 802.11 ax,” IEEE Access, vol. 6, pp. 47 546–47 556, 2018.
- S. Santi et al., “Accurate Energy Modeling and Characterization of IEEE 802.11 ah RAW and TWT,” Sensors, vol. 19, no. 11, p. 2614, 2019.
- E. Stepanova et al., “On the Joint Usage of Target Wake Time and 802.11 ba Wake-Up Radio,” IEEE Access, vol. 8, p. 221061, 2020.
- X. Guo et al., “Performance Evaluation of the Networks with Wi-Fi based TDMA Coexisting with CSMA/CA,” Wirel. Pers. Commun., 2020.
- E. Khorov et al., “Modeling of Real-Time Multimedia Streaming in Wi-Fi Networks with Periodic Reservations,” IEEE Access, vol. 8, 2020.
- L. Kleinrock, Queueing Systems. Volume 1: Theory. Wiley-Interscience.
- T. T. Lee, “M/G/1/N queue with vacation time and limited service discipline,” Performance Evaluation, vol. 9, no. 3, pp. 181–190, 1989.
- F. R. De Hoog et al., “An Improved Method for Numerical Inversion of Laplace Transforms,” J Sci Comput., vol. 3, no. 3, pp. 357–366, 1982.
- A. Barannikov et al., “False Protection of Real-Time Traffic with Quieting in Heterogeneous Wi-Fi 7 Networks: An Experimental Study,” Sensors, vol. 23, no. 21, p. 8927, 2023.
- R. Liu et al., “A First Look at Wi-Fi 6 in Action: Throughput, Latency, Energy Efficiency, and Security,” ACM POMACS, vol. 7, pp. 1–25, 2023.
- Event-Driven Custom Simulator for Modeling of R-TWT. [Online]. Available: https://github.com/imec-idlab/R-TWT-sim-public