Performance Evaluation of Heterogeneous IoT Nodes With Differentiated QoS in IEEE 802.11ah RAW Mechanism

Ali, M. Zulfiker; Mišić, Jelena; Mišić, Vojislav B.

doi:10.1109/tvt.2019.2897127

Cited by 46 publications

(34 citation statements)

References 11 publications

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“…Unfortunately, saturated traffic assumption does not fit our scenario of emergency alerts delivery. The papers [11], [13], [16]- [21] consider the non-saturated traffic as well. The paper [13] examines the scenario where sensors switch between regular and emergency reporting, and the channel access mechanism automatically adjusts the behavior according to the reporting state estimation.…”

Section: Related Workmentioning

confidence: 99%

“…Unlike [13], [16], the authors of [11], [17]- [21] analyze the EDCA operation inside RAW. The paper [17] presents the model that allows finding the proper RAW slot duration for the reliable delivery of machine-to-machine traffic.…”

Section: Related Workmentioning

confidence: 99%

“…The authors of [19] conclude that in case of a high load, to avoid long transmission delay, the RAW mechanism should be complemented with so-called common contention period, where all devices are allowed to transmit. The model presented in [19] is further developed in [11]: the authors of [11] examine different EDCA access categories within one RAW slot. The authors of [20] confirm that the RAW mechanism has much better performance than the legacy EDCA.…”

Section: Related Workmentioning

confidence: 99%

“…But as the emergency events rarely happen, most of the time, the channel is underutilized. Another option is a heterogeneous network [11] with emergency sensors and other devices. In that case, to provide fast and reliable alert delivery, the emergency sensors should be protected from channel contention with the other devices.…”

Section: Introductionmentioning

confidence: 99%

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Fast and Reliable Alert Delivery in Mission-Critical Wi-Fi HaLow Sensor Networks

et al. 2020

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Rapidly evolving, the Internet of Things imposes new challenges for the developers of wireless networks. Various critical infrastructure monitoring scenarios require fast and reliable alert delivery. In such systems, multiple sensors are entrusted to react to the same emergency event. Thus, it is enough to receive an alert message from any of these sensors. However, such a message shall be reliably delivered as soon as possible. The recently published Wi-Fi HaLow standard defines the Restricted Access Window (RAW) mechanism that coordinates transmissions of numerous devices. Thus, it can improve reliability and reduce delays. The paper is the first to study the usage of RAW in a scenario of emergency alerts, where the alert shall be received from at least one sensor. The paper presents an easy-to-calculate mathematical model of alert delivery with RAW. The model allows dynamic online reconfiguration of RAW parameters to select such parameters that minimize consumed channel timeshare while providing satisfactory reliability and delivery delay for an alert. Intensive performance evaluation shows that the RAW is fruitful for mission-critical data delivery in the considered scenario. INDEX TERMS IEEE 802.11ah, restricted access window, sensor network, alert.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast and Reliable Alert Delivery in Mission-Critical Wi-Fi HaLow Sensor Networks

et al. 2020

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“…The amendment was published in 2017 and already attracted significant attention from the academia [4]- [19]. These papers examine performance of RAW mechanism in different scenarios analytically [4]- [14], via simulation [15]- [18], or focusing only on PHY aspects [19]. Unfortunately, many papers that estimate the RAW performance do not take into account the peculiarities of the backoff countdown process with RAW (see details in Section II-A).…”

Section: Introductionmentioning

confidence: 99%

Enabling the Internet of Things With Wi-Fi Halow—Performance Evaluation of the Restricted Access Window

et al. 2019

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IEEE 802.11ah, a new amendment to the Wi-Fi standard, adapts Wi-Fi networks to the emerging Internet of Things (IoT). A key component of .11ah is the Restricted Access Window (RAW), a new channel access mechanism, which reduces contention when even thousands of IoT devices operate in the same area by assigning them different channel times. This paper shows that existing studies incorrectly understand the RAW behavior, oversimplify its modeling and thereby overestimate the real system throughput in several times, especially for short durations of the reserved RAW slots. The core contribution of this paper is a new mathematical model based on a completely different approach, which yields more accurate results and thereby enables better IoT system dimensioning. The developed model is suitable for many scenarios typical for IoT. It allows finding RAW parameters that optimize system performance in terms of throughput, power consumption, and packet loss ratio. The proposed solution is can be used for various traffic patterns: when each device transmits a single packet, a batch of packets of random size, or it has full-buffer traffic.

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Industrial Internet of Things: Smart Factory

Gao

Zhuang

2021

Wireless Networks

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Performance Evaluation of Heterogeneous IoT Nodes With Differentiated QoS in IEEE 802.11ah RAW Mechanism

Cited by 46 publications

References 11 publications

Fast and Reliable Alert Delivery in Mission-Critical Wi-Fi HaLow Sensor Networks

Fast and Reliable Alert Delivery in Mission-Critical Wi-Fi HaLow Sensor Networks

Enabling the Internet of Things With Wi-Fi Halow—Performance Evaluation of the Restricted Access Window

Industrial Internet of Things: Smart Factory

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