The IEEE 802.15.4e amendment provides different modalities over which Wireless Sensor Networks (WSNs) can be deployed, even with strict requirements in terms of latency and determinism; still, there seems to be room for improvement. This paper proposes two enhancements for IEEE 802.15.4e LLDN mode: (1) allowing a reduced and more predictable configuration time and (2) focusing on the worst-case latency for high-priority traffic. A comparison with standard LLDN is then performed and evaluated, either through Monte Carlo simulations or analytically.
Fully automated agricultural field treatments and Precise Farming are coming in shortly; yet increasing production needs demand a more efficient, planned and harmonized interaction between the machinery clusters involved in the work session. Soon a strong, effective and integrated standardization will be more than needed. This is the path the ISO standardization working group ISO TC-127/SC19/WG5 has taken. The paper describes the further enhancements done from previous works [1,2]. Particularly, we focused on stabilizing performances of high priority communications at the expense of best-effort, low urgency traffic. Performances are explained as [2]. The main improvements concern some kernel modifications, especially about the networking management. The results will show significant steps forward towards a quasi-isochronous transport protocol that manages high priority flows ensuring a high level of determinism and throughput.
Ab digital communications in many environments, from household entertainment to PLC robotics in industrial assembly lines. Even in automotive industry, the interest in this technology is increasingly growing, basically by the need of high throughput that high dynamics distributed control demands. and technological aspects of advanced Ethernet networks in order to provide a high vehicle distribution control.
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