{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T17:30:17Z","timestamp":1772213417729,"version":"3.50.1"},"reference-count":36,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,2,25]],"date-time":"2021-02-25T00:00:00Z","timestamp":1614211200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>New radio chips implement different physical layers, allowing firmware to change modulation, datarate and frequency dynamically. This technological development is an opportunity for industrial low-power wireless networks to offer even higher determinism, including latency predictability. This article introduces 6DYN, an extension to the IETF 6TiSCH standards-based protocol stack. In a 6DYN network, nodes switch physical layer dynamically on a link-by-link basis, in order to exploit the diversity offered by this new technology agility. To offer low latency and high network capacity, 6DYN uses heterogeneous slot durations: the length of a slot in the 6TiSCH schedule depends on the physical layer used. This article shows how reserved bits in 6TiSCH headers can be used to standardize 6DYN and details its implementation in OpenWSN, a reference implementation of 6TiSCH.<\/jats:p>","DOI":"10.3390\/s21051611","type":"journal-article","created":{"date-parts":[[2021,2,26]],"date-time":"2021-02-26T04:36:24Z","timestamp":1614314184000},"page":"1611","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["6DYN : 6TiSCH with Heterogeneous Slot Durations"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2529-8272","authenticated-orcid":false,"given":"Mina","family":"Rady","sequence":"first","affiliation":[{"name":"Orange Labs, 38240 Meylan, France"},{"name":"The National Institute for Research in Computer Science and Automation (Inria), EVA Team, 75012 Paris, France"}]},{"given":"Quentin","family":"Lampin","sequence":"additional","affiliation":[{"name":"Orange Labs, 38240 Meylan, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3379-9341","authenticated-orcid":false,"given":"Dominique","family":"Barthel","sequence":"additional","affiliation":[{"name":"Orange Labs, 38240 Meylan, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3695-9315","authenticated-orcid":false,"given":"Thomas","family":"Watteyne","sequence":"additional","affiliation":[{"name":"The National Institute for Research in Computer Science and Automation (Inria), EVA Team, 75012 Paris, France"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,25]]},"reference":[{"key":"ref_1","first-page":"4","article-title":"Industrial Internet of Things Monitoring Solution for Advanced Predictive Maintenance Applications","volume":"7","author":"Civerchia","year":"2017","journal-title":"Elsevier J. Ind. Inf. Integr."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1016\/j.comcom.2015.09.006","article-title":"A Survey on Wireless Sensor Networks for Smart Grid","volume":"71","author":"Fadel","year":"2015","journal-title":"IEEE Comput. Commun."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1145\/2532644","article-title":"A Review of Wireless-Sensor-Network-Enabled Building Energy Management Systems","volume":"10","author":"Kazmi","year":"2014","journal-title":"ACM Trans. Sens. Netw."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"e2","DOI":"10.4108\/eai.1-12-2016.151711","article-title":"PEACH: Predicting Frost Events in Peach Orchards Using IoT Technology","volume":"2","author":"Watteyne","year":"2016","journal-title":"EAI Endorsed Trans. Internet Things"},{"key":"ref_5","unstructured":"IEEE (2012). 802.15.4e-2012\u2014IEEE Standard for Local and Metropolitan Area Networks\u2014Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs) Amendment 1: MAC Sublayer, IEEE."},{"key":"ref_6","unstructured":"IEEE (2016). IEEE Standard for Local and Metropolitan Area Networks\u2014Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs), IEEE."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1025","DOI":"10.1109\/JPROC.2015.2509186","article-title":"Industrial Wireless IP-based Cyber Physical Systems","volume":"104","author":"Watteyne","year":"2016","journal-title":"Proc. IEEE"},{"key":"ref_8","unstructured":"IEEE (2012). IEEE Standard for Local and Metropolitan Area Networks\u2013Part 15.4: Low-Rate Wireless Personal Area Networks (LR-WPANs) Amendment 3: Physical Layer (PHY) Specifications for Low-Data-Rate, Wireless, Smart Metering Utility Networks, IEEE."},{"key":"ref_9","unstructured":"Atmel (2016). Atmel AT86RF215 Device Family Datasheet, Atmel Corporation. [42415th ed.]."},{"key":"ref_10","unstructured":"Rady, M., Lampin, Q., Barthel, D., and Watteyne, T. (2021). Initial Design of a Generalization of the 6TiSCH Standard to Support Multiple PHY Layers. Research Report, Inria."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"36","DOI":"10.1109\/MCOM.2014.6979984","article-title":"6TiSCH: Deterministic IP-Enabled Industrial Internet (of Things)","volume":"52","author":"Dujovne","year":"2014","journal-title":"IEEE Commun. Mag."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Wang, Q., Vilajosana, X., and Watteyne, T. (2018). 6TiSCH Operation Sublayer (6top) Protocol (6P), Internet Engineering Task Force (IETF).","DOI":"10.17487\/RFC8480"},{"key":"ref_13","unstructured":"Chang, T., Vucinic, M., Vilajosana, X., Duquennoy, S., and Dujovne, D. (2020). 6TiSCH Minimal Scheduling Function (MSF), Internet Engineering Task Force (IETF)."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Hui, J., and Thubert, P. (2011). Compression Format for IPv6 Datagrams over IEEE 802.15.4-Based Networks, Internet Engineering Task Force (IETF).","DOI":"10.17487\/rfc6282"},{"key":"ref_15","unstructured":"Winter, T., Thubert, P., Brandt, A., Hui, J., Kelsey, R., Levis, P., Pister, K., Struik, R., Vasseur, J., and Alexander, R. (2012). RPL: IPv6 Routing Protocol for Low-Power and Lossy Networks, Internet Engineering Task Force (IETF)."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Chang, T., Watteyne, T., Wheeler, B., Maksimovic, F., Khan, O., Mesri, S., Lee, L., Suciu, I., Burnett, D., and Vilajosana, X. (2020). 6TiSCH on SC\u03bcM: Running a Synchronized Protocol Stack without Crystals. Sensors, 20.","DOI":"10.3390\/s20071912"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Watteyne, T., Doherty, L., Simon, J., and Pister, K. (2013, January 3\u20135). Technical Overview of SmartMesh IP. Proceedings of the 2013 Seventh International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, Taichung, Taiwan.","DOI":"10.1109\/IMIS.2013.97"},{"key":"ref_18","unstructured":"Tanaka, Y., Le, H., Kobayashi, V., Lopez, C., Watteyne, T., and Rady, M. (2020, January 17\u201319). Demo: Blink\u2014Room-Level Localization Using SmartMesh IP. Proceedings of the International Conference on Embedded Wireless Systems and Networks (EWSN), Lyon, France."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1016\/j.comcom.2017.10.004","article-title":"Scheduling for IEEE802.15.4-TSCH and slow channel hopping MAC in low power industrial wireless networks: A survey","volume":"114","author":"Hermeto","year":"2017","journal-title":"Comput. Commun."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Palattella, M.R., Accettura, N., Dohler, M., Grieco, L.A., and Boggia, G. (2012, January 9\u201312). Traffic Aware Scheduling Algorithm for reliable low-power multi-hop IEEE 802.15.4e networks. Proceedings of the 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications\u2014(PIMRC), Sydney, Australia.","DOI":"10.1109\/PIMRC.2012.6362805"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3655","DOI":"10.1109\/JSEN.2013.2266417","article-title":"On Optimal Scheduling in Duty-Cycled Industrial IoT Applications Using IEEE 802.15.4e TSCH","volume":"13","author":"Palattella","year":"2013","journal-title":"IEEE Sensors J."},{"key":"ref_22","unstructured":"Ridha, S., Minet, P., and Livolant, E. (2012, January 1\u20133). MODESA: An optimized multichannel slot assignment for raw data convergecast in wireless sensor networks. Proceedings of the 2012 IEEE 31st International Performance Computing and Communications Conference (IPCCC), Austin, TX, USA."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1109\/MCOM.2014.6710073","article-title":"Scheduling multi-channel and multi-timeslot in time constrained wireless sensor networks via simulated annealing and particle swarm optimization","volume":"52","author":"Kim","year":"2014","journal-title":"IEEE Commun. Mag."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1504\/IJSNET.2008.016461","article-title":"Minimising the effect of WiFi interference in 802.15.4 wireless sensor networks","volume":"3","author":"Terzis","year":"2008","journal-title":"Int. J. Sens. Netw."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Gonga, A., Landsiedel, O., Soldati, P., and Johansson, M. (2012, January 16\u201318). Revisiting Multi-channel Communication to Mitigate Interference and Link Dynamics in Wireless Sensor Networks. Proceedings of the 2012 IEEE 8th International Conference on Distributed Computing in Sensor Systems, Hangzhou, China.","DOI":"10.1109\/DCOSS.2012.15"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Liu, X., Zhai, X., Lu, W., and Wu, C. (2019). QoS-guarantee Resource Allocation for Multibeam Satellite Industrial Internet of Things with NOMA. IEEE Trans. Ind. Inform., 2052\u20132061.","DOI":"10.1109\/TII.2019.2951728"},{"key":"ref_27","unstructured":"ETSI (2012). Part 1: Technical characteristics and test methods. Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Short Range Devices (SRD); Radio Equipment to be Used in the 25 MHz to 1000 MHz Frequency Range with Power Levels Ranging up to 500 mW, European Telecommunications Standards Institute (ETSI)."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Rady, M., Lampin, Q., Barthel, D., and Watteyne, T. (2020). No Free Lunch\u2014Characterizing the Performance of 6TiSCH When Using Different Physical Layers. Sensors, 20.","DOI":"10.3390\/s20174989"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"79147","DOI":"10.1109\/ACCESS.2020.2990278","article-title":"Key Performance Indicators of the Reference 6TiSCH Implementation in Internet-of-Things Scenarios","volume":"8","author":"Vucinic","year":"2020","journal-title":"IEEE Access"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Brachmann, M., Duquennoy, S., Tsiftes, N., and Voigt, T. (2019, January 14\u201317). IEEE 802.15.4 TSCH in Sub-GHz: Design Considerations and Multi-Band Support. Proceedings of the 2019 IEEE 44th Conference on Local Computer Networks (LCN), Osnabrueck, Germany.","DOI":"10.1109\/LCN44214.2019.8990806"},{"key":"ref_31","unstructured":"Munoz, J., Vilajosana, X., and Chang, T. (2018). Problem Statement for Generalizing 6TiSCH to Multiple PHYs, Internet Engineering Task Force (IETF)."},{"key":"ref_32","unstructured":"Texas Instruments (2015). Datasheet: CC2538 Powerful Wireless Microcontroller System-On-Chip for 2.4-GHz IEEE 802.15.4, 6LoWPAN, and ZigBee Applications, Texas Instruments Incorporated."},{"key":"ref_33","unstructured":"Vilajosana, X., Pister, K., and Watteyne, T. (2017). Minimal IPv6 over the TSCH Mode of IEEE 802.15.4e (6TiSCH) Configuration, Internet Engineering Task Force (IETF)."},{"key":"ref_34","unstructured":"Vucinic, M., Simon, J., Pister, K., and Richardson, M. (2020). Constrained Join Protocol (CoJP) for 6TiSCH, Internet Engineering Task Force (IETF)."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1002\/ett.2558","article-title":"OpenWSN: A standards-based low-power wireless development environment","volume":"23","author":"Watteyne","year":"2012","journal-title":"Trans. Emerg. Telecommun. Technol."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Duquennoy, S., Nahas, B.A., Landsiedel, O., and Watteyne, T. (2015, January 1\u20134). Orchestra: Robust Mesh Networks Through Autonomously Scheduled TSCH. Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems\u2014SenSys\u201915, New York, NY, USA.","DOI":"10.1145\/2809695.2809714"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/5\/1611\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:28:33Z","timestamp":1760160513000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/5\/1611"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,2,25]]},"references-count":36,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,3]]}},"alternative-id":["s21051611"],"URL":"https:\/\/doi.org\/10.3390\/s21051611","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,2,25]]}}}