Enabling Listening Suspension in the Time Slotted Channel Hopping Protocol

TL;DR

This paper introduces a MAC layer mechanism for IEEE 802.15.4 mesh networks that suspends listening to reduce energy consumption by temporarily disabling links based on traffic patterns.

Contribution

It presents a novel listening suspension method that proactively minimizes idle listening in time slotted channel hopping protocols.

Findings

Significant reduction in energy consumption due to listening suspension.

Effective identification of slow-rate data streams for link disabling.

Improved network efficiency with minimal impact on data delivery.

Abstract

Time slotted channel hopping provides reliable and deterministic communication in IEEE 802.15.4 mesh networks. Although slotted access is able to lower energy consumption drastically by reducing the duty cycle of the radio module, it usually leads to significant idle listening experienced by receivers, which makes it a sub-optimal solution when ultra low-power wireless is sought for. In this paper a listening suspension mechanism is described, which operates at the MAC layer and is part of a more general approach aimed at cutting down energy consumption by proactively reducing idle listening. Links can be temporarily disabled, that convey slow-rate data streams whose characteristics, e.g., the generation period, are either known in advance to some extent or can be inferred by traffic inspection.