{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T07:21:09Z","timestamp":1773386469053,"version":"3.50.1"},"reference-count":48,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2022,10,16]],"date-time":"2022-10-16T00:00:00Z","timestamp":1665878400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Russian Science Foundation","award":["21-19-00846"],"award-info":[{"award-number":["21-19-00846"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Future Internet"],"abstract":"<jats:p>Real-time applications (RTA) are an important use case for IEEE 802.11be, a new amendment to the Wi-Fi standard. This amendment introduces new complicated mechanisms to provide low delay and high reliability for RTA, but many of them are not supported by legacy devices that may be present in future Wi-Fi networks. In contrast, the preliminary channel access (PCA) method is designed to satisfy strict RTA requirements even in the presence of legacy devices and does not require significant changes to the Wi-Fi protocol. However, it significantly reduces the capacity for non-RTA traffic. This paper introduces a Smart PCA method, which improves the performance of all the stations in scenarios with multiple RTA stations. Extensive simulation shows that the Smart PCA method guarantees low delays for intensive RTA traffic in these scenarios. Moreover, it doubles the network capacity for the stations with non-RTA traffic.<\/jats:p>","DOI":"10.3390\/fi14100296","type":"journal-article","created":{"date-parts":[[2022,10,17]],"date-time":"2022-10-17T00:04:55Z","timestamp":1665965095000},"page":"296","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Smart Preliminary Channel Access to Support Real-Time Traffic in Wi-Fi Networks"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5583-6401","authenticated-orcid":false,"given":"Kirill","family":"Chemrov","sequence":"first","affiliation":[{"name":"Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2216-3719","authenticated-orcid":false,"given":"Dmitry","family":"Bankov","sequence":"additional","affiliation":[{"name":"Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5541-4671","authenticated-orcid":false,"given":"Evgeny","family":"Khorov","sequence":"additional","affiliation":[{"name":"Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3195-3210","authenticated-orcid":false,"given":"Andrey","family":"Lyakhov","sequence":"additional","affiliation":[{"name":"Institute for Information Transmission Problems of the Russian Academy of Sciences, 127051 Moscow, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,16]]},"reference":[{"key":"ref_1","unstructured":"Cavalcanti, D., Bush, S., Illouz, M., Kronauer, G., Regev, A., and Venkatesan, G. (2020). Wireless TSN\u2013Definitions, Use Cases & Standards Roadmap. Avnu Alliance, 1\u201316."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Li, Z., Uusitalo, M.A., Shariatmadari, H., and Singh, B. (2018, January 28\u201331). 5G URLLC: Design Challenges and System Concepts. Proceedings of the 2018 15th International Symposium on Wireless Communication Systems (ISWCS), Lisbon, Portugal.","DOI":"10.1109\/ISWCS.2018.8491078"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1109\/MNET.2018.1700227","article-title":"Packet Duplication for URLLC in 5G: Architectural Enhancements and Performance Analysis","volume":"32","author":"Rao","year":"2018","journal-title":"IEEE Netw."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"107331","DOI":"10.1016\/j.comnet.2020.107331","article-title":"Fast and accurate analytical tools to estimate network capacity for URLLC in 5G systems","volume":"178","author":"Karamyshev","year":"2020","journal-title":"Comput. Netw."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2111","DOI":"10.1109\/TMC.2020.2976055","article-title":"A framework to maximize the capacity of 5g systems for ultra-reliable low-latency communications","volume":"20","author":"Khorov","year":"2020","journal-title":"IEEE Trans. Mob. Comput."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"67064","DOI":"10.1109\/ACCESS.2021.3073806","article-title":"URLLC for 5G and Beyond: Requirements, Enabling Incumbent Technologies and Network Intelligence","volume":"9","author":"Ali","year":"2021","journal-title":"IEEE Access"},{"key":"ref_7","unstructured":"(2022, August 29). IEEE 802.11 Real Time Applications TIG Report. Available online: https:\/\/mentor.ieee.org\/802.11\/dcn\/18\/11-18-2009-06-0rta-rta-report-draft.docx,."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Avdotin, E., Bankov, D., Khorov, E., and Lyakhov, A. (2020, January 26\u201329). Resource Allocation Strategies for Real-Time Applications in Wi-Fi 7. Proceedings of the 2020 IEEE International Black Sea Conference on Communications and Networking (BlackSeaCom), Odessa, Ukraine.","DOI":"10.1109\/BlackSeaCom48709.2020.9234994"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Yang, M., Li, B., Yan, Z., and Yan, Y. (2019, January 23\u201325). AP Coordination and Full-duplex enabled Multi-band Operation for the Next Generation WLAN: IEEE 802.11be (EHT). Proceedings of the 2019 11th International Conference on Wireless Communications and Signal Processing (WCSP), Xi\u2019an, China.","DOI":"10.1109\/WCSP.2019.8928021"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Naik, G., Ogbe, D., and Park, J.M.J. (2021, January 14\u201323). Can Wi-Fi 7 Support Real-Time Applications? On the Impact of Multi Link Aggregation on Latency. Proceedings of the ICC 2021\u2014IEEE International Conference on Communications, Montreal, QC, Canada.","DOI":"10.1109\/ICC42927.2021.9500256"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Carrascosa, M., Geraci, G., Knightly, E., and Bellalta, B. (2022, January 16\u201320). An Experimental Study of Latency for IEEE 802.11be Multi-link Operation. Proceedings of the ICC 2022\u2014IEEE International Conference on Communications, Seoul, Korea.","DOI":"10.1109\/ICC45855.2022.9838765"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Park, H., and You, C. (2021, January 23\u201325). Latency Impact for Massive Real-Time Applications on Multi Link Operation. Proceedings of the 2021 IEEE Region 10 Symposium (TENSYMP), Jeju, Korea.","DOI":"10.1109\/TENSYMP52854.2021.9550829"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Genc, E., and Del Carpio, L.F. (2019, January 27\u201329). Wi-Fi QoS Enhancements for Downlink Operations in Industrial Automation Using TSN. Proceedings of the 2019 15th IEEE International Workshop on Factory Communication Systems (WFCS), Sundsvall, Sweden.","DOI":"10.1109\/WFCS.2019.8757992"},{"key":"ref_14","unstructured":"(2022). IEEE P802.11beTM\/D2.0 Draft Standard for Information Technology \u2014 Telecommunications and Information Exchange between Systems Local and Metropolitan Area Networks \u2014 Specific Requirements, IEEE."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Bankov, D., Chemrov, K., and Khorov, E. (2020, January 5\u20137). Tuning Channel Access to Enable Real-Time Applications in Wi-Fi 7. Proceedings of the 2020 12th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), Brno, Czech Republic.","DOI":"10.1109\/ICUMT51630.2020.9222409"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1109\/MWC.2016.7422404","article-title":"IEEE 802.11 ax: High-efficiency WLANs","volume":"23","author":"Bellalta","year":"2016","journal-title":"IEEE Wirel. Commun."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1109\/MCOM.2017.1700285","article-title":"IEEE 802.11 ax: Highly efficient WLANs for intelligent information infrastructure","volume":"55","author":"Deng","year":"2017","journal-title":"IEEE Commun. Mag."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Lee, K.h. (2019). Performance analysis of the IEEE 802.11 ax MAC protocol for heterogeneous Wi-Fi networks in non-saturated conditions. Sensors, 19.","DOI":"10.3390\/s19071540"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Naribole, S., Lee, W.B., and Ranganath, A. (2019, January 22\u201325). Impact of MU EDCA Channel Access on IEEE 802.11ax WLANs. Proceedings of the 2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), Honolulu, HI, USA.","DOI":"10.1109\/VTCFall.2019.8891575"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Bhattarai, S., Naik, G., and Park, J.M.J. (2019, January 20\u201324). Uplink resource allocation in IEEE 802.11 ax. Proceedings of the ICC 2019\u20142019 IEEE International Conference on Communications (ICC), Shanghai, China.","DOI":"10.1109\/ICC.2019.8761594"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Rathor, R.G., and Joshi, R.D. (2021, January 26\u201328). Performance Analysis of IEEE802.11ax (Wi-Fi 6) Technology using Multi-user MIMO and Up-Link OFDMA for Dense Environment. Proceedings of the 2021 IEEE 2nd International Conference on Applied Electromagnetics, Signal Processing, & Communication (AESPC), Bhubaneswar, India.","DOI":"10.1109\/AESPC52704.2021.9708544"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"322","DOI":"10.12720\/jcm.17.5.322-338","article-title":"A Proportional Scheduling Protocol for the OFDMA-Based Future Wi-Fi Network","volume":"17","author":"Islam","year":"2022","journal-title":"J. Commun."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Uwai, T., Miyamoto, T., Nagao, Y., Lanante, L., Kurosaki, M., and Ochi, H. (November, January 31). Adaptive backoff mechanism for OFDMA random access with finite service period in IEEE 802. 11ax. Proceedings of the 2016 IEEE Conference on Standards for Communications and Networking (CSCN), Berlin, Germany.","DOI":"10.1109\/CSCN.2016.7785174"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Bai, J., Fang, H., Suh, J., Aboul-Magd, O., Au, E., and Wang, X. (2018, January 16\u201318). Adaptive uplink OFDMA random access grouping scheme for ultra-dense networks in IEEE 802.11 ax. Proceedings of the 2018 IEEE\/CIC International Conference on Communications in China (ICCC), Beijing, China.","DOI":"10.1109\/ICCChina.2018.8641202"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Wang, J., Wu, M., Chen, Q., Zheng, Y., and Zhu, Y.h. (2019, January 15\u201318). Probability Complementary Transmission Scheme for Uplink OFDMA-based Random Access in 802.11ax WLAN. Proceedings of the 2019 IEEE Wireless Communications and Networking Conference (WCNC), Marrakesh, Morocco.","DOI":"10.1109\/WCNC.2019.8885789"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Kim, Y., Kwon, L., and Park, E.C. (2021). OFDMA backoff control scheme for improving channel efficiency in the dynamic network environment of IEEE 802.11 ax WLANs. Sensors, 21.","DOI":"10.3390\/s21155111"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1109\/LNET.2021.3138277","article-title":"Uplink OFDMA-Based Random Access Mechanism With Bursty Arrivals for IEEE 802.11 ax Systems","volume":"4","author":"Cheng","year":"2021","journal-title":"IEEE Netw. Lett."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1338","DOI":"10.1109\/LCOMM.2022.3166907","article-title":"Cooperative Resource Scheduling for Time-sensitive Services in an Integrated XGS-PON and Wi-Fi 6 Network","volume":"26","author":"Li","year":"2022","journal-title":"IEEE Commun. Lett."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"8855","DOI":"10.1109\/ACCESS.2022.3140560","article-title":"An Efficient Backoff Procedure for IEEE 802.11ax Uplink OFDMA-Based Random Access","volume":"10","author":"Domino","year":"2022","journal-title":"IEEE Access"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Abramson, N. (1970, January 17\u201319). The ALOHA system: Another alternative for computer communications. Proceedings of the Fall Joint Computer Conference, Houston TX, USA.","DOI":"10.1145\/1478462.1478502"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2029","DOI":"10.1109\/ACCESS.2016.2557758","article-title":"Goodbye, ALOHA!","volume":"4","author":"Laya","year":"2016","journal-title":"IEEE Access"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Kim, Y., Oh, S., Kim, G., and Jeong, J. (2021, January 17\u201320). Performance Analysis of QTP-based S2S Transmission in IEEE 802.11axWLANs. Proceedings of the 2021 Twelfth International Conference on Ubiquitous and Future Networks (ICUFN), Jeju Island, Korea.","DOI":"10.1109\/ICUFN49451.2021.9528715"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"55633","DOI":"10.1109\/ACCESS.2020.2981838","article-title":"Modeling of Real-Time Multimedia Streaming in Wi-Fi Networks With Periodic Reservations","volume":"8","author":"Khorov","year":"2020","journal-title":"IEEE Access"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1109\/MCOM.001.1900338","article-title":"IEEE 802.11 be extremely high throughput: The next generation of Wi-Fi technology beyond 802.11 ax","volume":"57","author":"Kasslin","year":"2019","journal-title":"IEEE Commun. Mag."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"88664","DOI":"10.1109\/ACCESS.2020.2993448","article-title":"Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7","volume":"8","author":"Khorov","year":"2020","journal-title":"IEEE Access"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"2136","DOI":"10.1109\/COMST.2020.3012715","article-title":"IEEE 802.11 be Wi-Fi 7: New challenges and opportunities","volume":"22","author":"Deng","year":"2020","journal-title":"IEEE Commun. Surv. Tutorials"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1765","DOI":"10.1007\/s11036-020-01567-7","article-title":"Survey and perspective on extremely high throughput (EHT) WLAN\u2014IEEE 802.11 be","volume":"25","author":"Yang","year":"2020","journal-title":"Mob. Netw. Appl."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1109\/MCOMSTD.0001.2100082","article-title":"Overview and Performance Evaluation of Wi-Fi 7","volume":"6","author":"Chen","year":"2022","journal-title":"IEEE Commun. Stand. Mag."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Adame, T., Carrascosa-Zamacois, M., and Bellalta, B. (2021). Time-sensitive networking in IEEE 802.11 be: On the way to low-latency WiFi 7. Sensors, 21.","DOI":"10.3390\/s21154954"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1177\/1550147719845312","article-title":"Enabling real-time applications in Wi-Fi networks","volume":"15","author":"Bankov","year":"2019","journal-title":"Int. J. Distrib. Sens. Netw."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Rentschler, M., and Laukemann, P. (2012, January 17\u201321). Performance analysis of parallel redundant WLAN. Proceedings of the 2012 IEEE 17th International Conference on Emerging Technologies Factory Automation (ETFA 2012), Krakow, Poland.","DOI":"10.1109\/ETFA.2012.6489647"},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Cena, G., Scanzio, S., Valenzano, A., and Zunino, C. (2014, January 5\u20137). An enhanced MAC to increase reliability in redundant Wi-Fi networks. Proceedings of the 2014 10th IEEE Workshop on Factory Communication Systems (WFCS 2014), Toulouse, France.","DOI":"10.1109\/WFCS.2014.6837591"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"856","DOI":"10.1109\/TII.2016.2641469","article-title":"Experimental evaluation of seamless redundancy applied to industrial Wi-Fi networks","volume":"13","author":"Cena","year":"2017","journal-title":"IEEE Trans. Ind. Inform."},{"key":"ref_44","unstructured":"(2022, August 29). Multi-Link for Low Latency. Available online: https:\/\/mentor.ieee.org\/802.11\/dcn\/20\/11-20-0093-02-00be-multi-link-for-low-latency.pptx,."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Lacalle, G., Val, I., Seijo, O., Mendicute, M., Cavalcanti, D., and Perez-Ramirez, J. (2021, January 21\u201323). Analysis of Latency and Reliability Improvement with Multi-Link Operation over 802.11. Proceedings of the 2021 IEEE 19th International Conference on Industrial Informatics (INDIN), Palma de Mallorca, Spain.","DOI":"10.1109\/INDIN45523.2021.9557495"},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Carrascosa-Zamacois, M., Galati-Giordano, L., Jonsson, A., Geraci, G., and Bellalta, B. (2022). Performance and Coexistence Evaluation of IEEE 802.11 be Multi-link Operation. arXiv.","DOI":"10.1109\/WCNC55385.2023.10118829"},{"key":"ref_47","unstructured":"(2022, August 29). Reducing Channel Access Delay for RTA Traffic. Available online: https:\/\/mentor.ieee.org\/802.11\/dcn\/19\/11-19-1960-01-00be-reducing-channel-access-delay-for-rta-traffic.pptx."},{"key":"ref_48","unstructured":"(2022, September 27). ns-3|a Discrete-Event Networks Simulator for Internet Systems. Available online: https:\/\/www.nsnam.org\/."}],"container-title":["Future Internet"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1999-5903\/14\/10\/296\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:55:06Z","timestamp":1760144106000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1999-5903\/14\/10\/296"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,10,16]]},"references-count":48,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2022,10]]}},"alternative-id":["fi14100296"],"URL":"https:\/\/doi.org\/10.3390\/fi14100296","relation":{},"ISSN":["1999-5903"],"issn-type":[{"value":"1999-5903","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,10,16]]}}}