In a large scale wireless mesh network, such as a Wireless Smart Utility Network (Wi-SUN), there can be many losses. For example, a transmitter typically does not know the availability of a receiver when transmitting, which can create losses. In another example, link quality measurements, such as expected transmission count (ETX), may not be well represented for every channel. In one instance, this proposal provides an improved scheduling technique that leverages Broadcast Interval (BI) information to determine receive (RX) and transmit (TX) plans for child nodes. Child nodes can select an appropriate parent node according to received schedules, which can facilitate download traffic propagation. In another instance, this proposal provides for the ability to facilitate fine management of ETX evaluation to improve the successful rate of packet delivery. Techniques of this proposal not only leverage a central control method, but also introduce a free contention mechanism through which a central node can announce acceptable time slots to sub-nodes. The central node may avoid assigning smaller slots for each sub-node in order to allow the sub-nodes to compete for communications. Thus, techniques herein may combine various advantages for both deterministic networks and mesh networks.
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Zhang, Lele; Li, Chuanwei; She, Huimin; and Xia, Yajun, "TECHNIQUES TO IMPROVE THE HIT RATE OF UNICAST NODE-TO-NODE (N2N) DELIVERY IN CHANNEL-HOPPING AND MULTI-HOP LOW-POWER AND LOSSY NETWORKS (LLNS)", Technical Disclosure Commons, (February 23, 2021)