Improving 6TiSCH Reliability and Latency with Simultaneous Multi-Band Operation

Abstract

The Internet Engineering Task Force (IETF) group "IPv6 over the TSCH mode of IEEE 802.15.4e" (6TiSCH) introduced a protocol, utilizing Time-Slotted Channel Hopping (TSCH) from IEEE802.15.4e, that achieves industrial performance requirements while offering the benefits of IP connectivity. This work proposes the addition of a second radio interface in 6TiSCH devices to operate a parallel network in sub-GHz, introducing transmit diversity while benefiting from reduced pathloss and interference. Simulation results show an improvement of 25% in Packet Delivery Ratio (PDR) and around 30% in latency in different network scenarios.

Exploiting Simultaneous Multi-Brand Operation to Improve 6TiSCH Reliability and Latency

“…This section presents the results of 36 simulated experiments, where the 12 different topologies were run 3 times with different random seeds 1 . The discussion regarding PDR and latency, for each individual interface and for the resulting multi-band network, is presented in the following subsections.…”

“…It is important to highlight that this work is an extended version of [1], including updated discussion related to the state of the art, as well as results from additional tests to provide insights on the effect of different node distances and the contribution of each band in the overall performance.…”