Abstract
This paper analyzes the feasibility of the coexistence of telemetry and alarm messages employing Long-Range Wide-Area Network (LoRaWAN) technology in industrial environments. The regular telemetry messages come from periodic measurements from the majority of sensors while the alarm messages come from sensors whose transmissions are triggered by rarer (random) events that require highly reliable communication. To reach such a strict requirement, we propose here strategies of allocation of spreading factor, by treating alarm and regular (telemetry) messages differently. The potential of such allocation strategies has also been investigated under retransmission and diversity of gateways. Both indoor industrial plant and open-field scenarios are investigated. We compare the proposed solution with a benchmark scenario—where no alarm is considered—by using system level simulation. Our results show that it is possible to achieve high reliability with reasonably low delay for the alarm messages without significantly affecting the performance of the regular links.
Highlights
Digitization of processes is widespread in different aspects of our society, from residential energy management systems to scheduling systems of public services
This paper focuses on the reliability and efficiency of regular and alarm messages with the goal of finding efficient ways of coordinating massive connectivity—the so-called massive machine-type communications [9], while allowing for reliable alarm messages for protection and security proposes in industrial environments
We rely on numerical results obtained from computational simulations using ns-3 (At this point, it is unfeasible to study the proposed scenario in a test-bed since (i) it requires a large number of nodes distributed in a large region and (ii) it is not possible to change the spreading factor (SF) allocation policy due to proprietary policies of long range (LoRa)
Summary
Digitization of processes is widespread in different aspects of our society, from residential energy management systems to scheduling systems of public services This tendency is happening in the industry The upcoming fifth generation of mobile wireless networks (5G) and its standardization-related forums (e.g., 3GPP and 5G-PPP), guided by ICT industry, are putting a strong focus on the so-called “vertical applications.”. These verticals are related to specific needs, systematized by the following classification (https://5g-ppp.eu/verticals/): Automotive, manufacturing, media, energy, eHealth, public safety, and smart cities. Three extreme operation modes have been identified in terms of end-application requirements [5], namely (i) massive
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