Seamless roaming and guaranteed communication using a synchronized single-hop multi-gateway 802.15.4e TSCH network

Haxhibeqiri, Jetmir; Karaağaç, Abdulkadir; Moerman, Ingrid; Hoebeke, Jeroen

doi:10.1016/j.adhoc.2018.10.025

Cited by 13 publications

(4 citation statements)

References 16 publications

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“…Finally, mobility in TSCH networks is a difficult topic that has not yet been heavily studied, with only a few results available to date. Jetmir Haxhibeqiri et al [45] proposed use of an Ethernet backbone network and single-hop IEEE 802.15.4 links. Atis Elsts et al designed Instant [46], a TSCH scheduling approach supporting mobile nodes.…”

Section: Time Slotted Channel Hopping (Tsch) Scheduling and Mobilitymentioning

confidence: 99%

Scheduling UWB Ranging and Backbone Communications in a Pure Wireless Indoor Positioning System

Charlier

Koutsiamanis

Quoitin

2022

IoT

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In this paper, we present and evaluate an ultra-wideband (UWB) indoor processing architecture that allows the performing of simultaneous localizations of mobile tags. This architecture relies on a network of low-power fixed anchors that provide forward-ranging measurements to a localization engine responsible for performing trilateration. The communications within this network are orchestrated by UWB-TSCH, an adaptation to the ultra-wideband (UWB) wireless technology of the time-slotted channel-hopping (TSCH) mode of IEEE 802.15.4. As a result of global synchronization, the architecture allows deterministic channel access and low power consumption. Moreover, it makes it possible to communicate concurrently over multiple frequency channels or using orthogonal preamble codes. To schedule communications in such a network, we designed a dedicated centralized scheduler inspired from the traffic aware scheduling algorithm (TASA). By organizing the anchors in multiple cells, the scheduler is able to perform simultaneous localizations and transmissions as long as the corresponding anchors are sufficiently far away to not interfere with each other. In our indoor positioning system (IPS), this is combined with dynamic registration of mobile tags to anchors, easing mobility, as no rescheduling is required. This approach makes our ultra-wideband (UWB) indoor positioning system (IPS) more scalable and reduces deployment costs since it does not require separate networks to perform ranging measurements and to forward them to the localization engine. We further improved our scheduling algorithm with support for multiple sinks and in-network data aggregation. We show, through simulations over large networks containing hundreds of cells, that high positioning rates can be achieved. Notably, we were able to fully schedule a 400-cell/400-tag network in less than 11 s in the worst case, and to create compact schedules which were up to 11 times shorter than otherwise with the use of aggregation, while also bounding queue sizes on anchors to support realistic use situations.

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Section: Time Slotted Channel Hopping (Tsch) Scheduling and Mobilitymentioning

confidence: 99%

Scheduling UWB Ranging and Backbone Communications in a Pure Wireless Indoor Positioning System

Charlier

Koutsiamanis

Quoitin

2022

IoT

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“…Haxhibeqiri et al [18] focus on the handover process by employing a singlehop network with multiple gateway nodes and a centralized manager. Once a mobile node reserves dedicated cells to one gateway, the network manager instructs the others gateways to install the same cell for that node.…”

Section: Mobility In Industrial Scenariosmentioning

confidence: 99%

Analysis of the Network Attachment Delay of Mobile Devices in the Industrial Internet of Things

Hermeto¹,

Bramas²,

Gallais³

et al. 2019

Ad-Hoc, Mobile, and Wireless Networks

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Industrial networks are typically used to monitor safetyrelated processes where high reliability and an upper bounded latency are crucial. Because of its flexibility, wireless is more and more popular, even for real-time applications. Because radio transmissions are known to be lossy, deterministic protocols have been proposed, to schedule carefully the transmissions to avoid collisions. In parallel, industrial environments now integrate mobile industrial robots to enable the Industry 4.0. Thus, the challenge consists in handling a set of mobile devices inside a static wireless network infrastructure. A mobile robot has to join the network before being able to communicate. Here, we analyze this attachment delay, comprising both the synchronization, and the negotiation of dedicated cells. In particular, since the control frames (EB and 6P) have a strong impact on the convergence, our proposed model carefully integrates the collision probability of these packets. We validate the accuracy of our model, and we analyze the impact of the different EB transmission policies on the discovery delay. Our performance evaluation demonstrates the interest of using efficiently the radio resources for beacons to handle these mobiles devices.

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“…Today, most research on handover capabilities in low-power IoT networks has been limited to other wireless technologies than BLE. For example, the work in [13] describes how this can be achieved for IEEE 802.15.4e TSCH networks. Existing research on BLE handover provides insight on how to transfer the state of the connection during the handover process between gateways [14].…”

Section: Related Workmentioning

confidence: 99%

A BLE-Based Multi-Gateway Network Infrastructure with Handover Support for Mobile BLE Peripherals

Baert

Camerlynck

Crombez

et al. 2019

2019 IEEE 16th International Conference on Mobile Ad Hoc and Sensor Systems (MASS)

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Bluetooth Low Energy (BLE) is a popular technology within the Internet of Things. It allows low-power, star networks to be set up between a BLE gateway and multiple, power-constrained BLE devices. However, these networks tend to be static, not supporting BLE devices that can freely move around in an environment of multiple interconnected BLE gateways and perform handovers whenever necessary. This work proposes two alternative network architectures for mobile BLE peripherals. One leverages on IPv6 over BLE, whereas the other combines default BLE mechanisms with an additional custom controller. On top, we study in detail the handover mechanism that must be present in both architectures and compare the performance of both a passive and active handover approach. The passive handover approach can be set up without any extra implementation, but an active handover approach offers more proactive handover decisions and can provide a much lower handover latency. All proposed solutions have been implemented and validated on real hardware, showing the feasibility of having future infrastructures with support for mobile BLE devices.

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Seamless roaming and guaranteed communication using a synchronized single-hop multi-gateway 802.15.4e TSCH network

Cited by 13 publications

References 16 publications

Scheduling UWB Ranging and Backbone Communications in a Pure Wireless Indoor Positioning System

Scheduling UWB Ranging and Backbone Communications in a Pure Wireless Indoor Positioning System

Analysis of the Network Attachment Delay of Mobile Devices in the Industrial Internet of Things

A BLE-Based Multi-Gateway Network Infrastructure with Handover Support for Mobile BLE Peripherals

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