On the (over)-Reactions and the Stability of a 6TiSCH Network in an Indoor Environment

Industrial networks differ from others kinds of networks because they require real-time performance in order to meet strict requirements. With the rise of low-power wireless standards, the industrial applications have started to use wireless communications in order to reduce deployment and management costs. IEEE802.15.4-TSCH represents currently a promising standard relying on a strict schedule of the transmissions to provide strong guarantees. However, the radio environment still exhibits time-variable characteristics. Thus, the network has to provision sufficient resource (bandwidth) to cope with the worst case while still achieving high energy efficiency. The 6TiSCH IETF working group defines a stack to tune dynamically the TSCH schedule. In this paper, we analyze in depth the stability and the convergence of a 6TiSCH network in an indoor testbed. We identify the main causes of instabilities, and we propose solutions to address each of them. We show that our solutions improve significantly the stability.

[1]  Thomas H. Clausen,et al.  A critical evaluation of the IPv6 Routing Protocol for Low Power and Lossy Networks (RPL) , 2011, 2011 IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob).

[2]  Saewoong Bahk,et al.  Load Balancing Under Heavy Traffic in RPL Routing Protocol for Low Power and Lossy Networks , 2017, IEEE Transactions on Mobile Computing.

[3]  Fabrice Theoleyre,et al.  Scheduling for IEEE802.15.4-TSCH and slow channel hopping MAC in low power industrial wireless networks: A survey , 2017, Comput. Commun..

[4]  István Z. Kovács,et al.  Interference Measurements in the European 868 MHz ISM Band with Focus on LoRa and SigFox , 2017, 2017 IEEE Wireless Communications and Networking Conference (WCNC).

[5]  Fabrice Theoleyre,et al.  Experimental analysis and characterization of a wireless sensor network environment , 2010, PE-WASUN '10.

[6]  Giuseppe Anastasi,et al.  IEEE 802.15.4e: A survey , 2016, Comput. Commun..

[7]  Fabrice Theoleyre,et al.  Passive Link Quality Estimation for Accurate and Stable Parent Selection in Dense 6TiSCH Networks , 2018, EWSN.

[8]  Fabrice Theoleyre,et al.  Is local blacklisting relevant in slow channel hopping low-power wireless networks? , 2017, 2017 IEEE International Conference on Communications (ICC).

[9]  Nicola Accettura,et al.  Simple Distributed Scheduling With Collision Detection in TSCH Networks , 2016, IEEE Sensors Journal.

[10]  Philip Levis,et al.  RPL: IPv6 Routing Protocol for Low-Power and Lossy Networks , 2012, RFC.

[11]  Fabrice Theoleyre,et al.  Experimental Validation of a Distributed Self-Configured 6TiSCH with Traffic Isolation in Low Power Lossy Networks , 2016, MSWiM.

[12]  Karel Heurtefeux,et al.  Experimental evaluation of a routing protocol for wireless sensor networks: RPL under study , 2013, 6th Joint IFIP Wireless and Mobile Networking Conference (WMNC).

[13]  Joakim Eriksson,et al.  Five-Nines Reliable Downward Routing in RPL , 2017, ArXiv.

[14]  Lei Shu,et al.  Smart Factory of Industry 4.0: Key Technologies, Application Case, and Challenges , 2018, IEEE Access.

[15]  Anis Koubaa,et al.  Radio link quality estimation in wireless sensor networks , 2012, ACM Trans. Sens. Networks.

[16]  Fabrice Theoleyre,et al.  Stability and efficiency of RPL under realistic conditions in Wireless Sensor Networks , 2013, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC).

[17]  Fabrice Theoleyre,et al.  The Love-Hate Relationship between IEEE 802.15.4 and RPL , 2017, IEEE Communications Magazine.

[18]  Qin Wang,et al.  6top Protocol (6P) , 2016 .

[19]  Tsung-Han Lee,et al.  RSSI-based IPv6 routing metrics for RPL in low-power and lossy networks , 2014, 2014 IEEE International Conference on Systems, Man, and Cybernetics (SMC).

[20]  Adnan Noor Mian,et al.  On the energy efficiency and stability of RPL routing protocol , 2017, 2017 13th International Wireless Communications and Mobile Computing Conference (IWCMC).

[21]  Pascal Thubert,et al.  Objective Function Zero for the Routing Protocol for Low-Power and Lossy Networks (RPL) , 2012, RFC.

[22]  Abel C. Lima-Filho,et al.  Embedded System Integrated Into a Wireless Sensor Network for Online Dynamic Torque and Efficiency Monitoring in Induction Motors , 2012, IEEE/ASME Transactions on Mechatronics.

[23]  David E. Culler,et al.  Do Not Lose Bandwidth: Adaptive Transmission Power and Multihop Topology Control , 2017, 2017 13th International Conference on Distributed Computing in Sensor Systems (DCOSS).

[24]  Carles Gomez,et al.  On the Network Convergence Process in RPL over IEEE 802.15.4 Multihop Networks: Improvement and Trade-Offs , 2014, Sensors.

[25]  Maria Rita Palattella,et al.  6TiSCH 6top Scheduling Function Zero / Experimental (SFX) , 2017 .