Abstract
IEEE std 802.15.4‐2015 Time Slotted Channel Hopping (TSCH) extends and replaces multiple proprietary industrial standards to support ultra‐reliable and ultra‐low power operation in Industrial Internet of Things. Under TSCH, all devices must remain continuously synchronized with their time source neighbor. To do so, the nodes either periodically exchange control packets or data packets to compensate for clock drift. However, single time source neighbor scheme endangers de‐synchronization in the wireless network. In this letter, we propose using multiple time source parents to improve the synchronization of the network.
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