We consider Robot-assisted Search&Rescue operations enhanced with some fixed image sensor nodes c... more We consider Robot-assisted Search&Rescue operations enhanced with some fixed image sensor nodes capable of capturing and sending visual information to a robot sink. In order to increase the performance of image transfer from image sensor nodes to the robot sinks we propose a 2-hop neighborhood information-based cover set selection to determine the most relevant image sensor nodes to activate. Then, in order to be consistent with our proposed approach, a multipath extension of Greedy Perimeter Stateless Routing (called T-GPSR) wherein routing decisions are also based on 2-hop neighborhood information is proposed. Simulation results show that our proposal reduces packet losses, enabling fast packet delivery and higher visual quality of received images at the robot sink.
Mission-critical surveillance applications such as intrusion detection or disaster response have ... more Mission-critical surveillance applications such as intrusion detection or disaster response have vital requirement in QoS. We consider a Wireless Image Sensor Network (WISN) with a scheduling of image sensor node's activity based on the application criticality level. This approach allows sentry nodes capable of detecting intrusions with a higher probability and alerting neighbor nodes as well as activating one of its cover sets for disambiguation purposes for instance. In this paper, we propose a multi-criteria approach to select the suitable cover set for reliable transmission of images in mission-critical applications. The proposed approach takes into account cover set size and energy, topology and routing information that affect the image quality at the sink in a multi-hop transmission network. The results show that our proposal provides low packet loss probability, low latency, and higher visual quality of received images at the Sink.
We consider Robot-assisted Search&Rescue operations enhanced with some fixed image sensor nodes c... more We consider Robot-assisted Search&Rescue operations enhanced with some fixed image sensor nodes capable of capturing and sending visual information to a robot sink. In order to increase the performance of image transfer from image sensor nodes to the robot sinks we propose a 2-hop neighborhood information-based cover set selection to determine the most relevant image sensor nodes to activate. Then, in order to be consistent with our proposed approach, a multipath extension of Greedy Perimeter Stateless Routing (called T-GPSR) wherein routing decisions are also based on 2-hop neighborhood information is proposed. Simulation results show that our proposal reduces packet losses, enabling fast packet delivery and higher visual quality of received images at the robot sink.
We consider Robot-assisted Search $\&$ Rescue operations enhanced with some fixed image sensor no... more We consider Robot-assisted Search $\&$ Rescue operations enhanced with some fixed image sensor nodes capable of capturing and sending visual information to a robot sink. In order to increase the performance of image transfer from image sensor nodes to the robot sinks we propose a 2-hop neighborhood information-based cover set selection to determine the most relevant image sensor nodes to activate. Then, in order to be consistent with our proposed approach, a multi-path extension of Greedy Perimeter Stateless Routing (called T-GPSR) wherein routing decisions are also based on 2-hop neighborhood information is proposed. Simulation results show that our proposal reduces packet losses, enabling fast packet delivery and higher visual quality of received images at the robot sink.
A 2-hop LoRa Approach Based on Smart and Transparent Relay-Device
LoRa is designed for long-range communication where devices are directly connected to the gateway... more LoRa is designed for long-range communication where devices are directly connected to the gateway, which removes typically the need of constructing and maintaining a complex multi-hop network. Nonetheless, even with the advantage of penetration of walls, the range may not sometimes be sufficient. This article describes a 2-hop LoRa approach to reduce both packet losses and transmission cost. To that aim, we introduce a smart, transparent and battery-operated relay-device that can be added after a deployment campaign to seamlessly provide an extra hop between the remote devices and the gateway. Field tests were conducted to assess relays’ ability to automatically synchronize to the network without advertising their presence.
Low-cost antenna technology for LPWAN IoT in rural applications
The article describes a low-cost and open IoT platform for rural applications in developing count... more The article describes a low-cost and open IoT platform for rural applications in developing countries. Using the latest low-power, long-range radio technologies and off-the-shelves components, the platform can be quickly deployed and customized for a large variery of rural applications. We present in the article how a low-cost IoT collar device especially addressing the cattle rustling issues can be built from the platform. The article then focuses on the antenna part by presenting how a low-cost integrated antenna design can increase the robustness of the IoT collar by avoiding external fragile parts while preserving a high transmission quality.
Similarity detection for smart and transparent long-range IoT relaying
2019 IEEE Symposium on Computers and Communications (ISCC)
LPWAN refers to highly energy-efficient wireless communication over very long distances. Nonethel... more LPWAN refers to highly energy-efficient wireless communication over very long distances. Nonetheless, even with the increased range, 1-hop connectivity can be difficult to achieve in real-world deployment scenario, especially for remote and rural areas where density of gateways is low and where devices/gateway are usually deployed for a specific application. Therefore a smart and transparent 2-hop approach has been proposed in a previous work to leverage these connectivity issues. This article extents this approach with similarity detection features in order to (i) reduce the power consumption when waking-up to relay packets and (ii) reduce the radio activity time when running under duty-cycle regulated constraints.
LoRa is a recent low-power and long-range sub-GHz radio technology where devices can communicate ... more LoRa is a recent low-power and long-range sub-GHz radio technology where devices can communicate in 1-hop to a gateway several kilometers away. Long-range radios typically remove the complexity of maintaining a multi-hop network with intermediate nodes for relaying information. Nonetheless, even with the increased range, 1-hop connectivity can be difficult to achieve in real-world deployment scenario, especially for remote and rural areas where density of gateways is low and where devices/gateway are usually deployed for a specific application. This article describes a 2-hop LoRa approach to seamlessly extend a deployed LoRa network in order to reduce both packet losses and transmission cost. We introduce a smart and batteryoperated relay-device that can be added after a deployment campaign to transparently provide an extra hop between the remote devices and the gateway. Field tests are conducted to assess network reliability by dynamic insertion of a relaydevice between the remote end-devices and the gateway, without advertising its presence. Energy consumption is also discussed.
2018 Global Internet of Things Summit (GIoTS), Jun 1, 2018
Precision Livestock Farming (PLF) is core to satisfying the ever increasing worldwide demand for ... more Precision Livestock Farming (PLF) is core to satisfying the ever increasing worldwide demand for dairy products of good quality and societal concerns over animal welfare and health, whilst heavily reducing environmental load and resource use. The features of an Internet-of-Things (IoT) inspired platform with the capability to provision of a range of services that promote the adoption of precision farming principles is reported.
Demo: WAZIUP, an Open and Versatile Long-range IoT Framework to Fully Take Advantage of the Cloudification of the IoT
The EU H2020 WAZIUP project builds an open IoT platform tailored to the specific requirements and... more The EU H2020 WAZIUP project builds an open IoT platform tailored to the specific requirements and constraints of developing countries. WAZIUP proposes a 100% DIY IoT approach for very low-cost IoT, yet highly efficient. One of the core component is a flexible, versatile, open-source IoT gateway with extensible customization features to fully take advantage of all data management possibilities offered by the cloudification of the IoT ecosystem. In the proposed demo, we will showcase the WAZIUP solutions for low-cost, long-range IoT and focus on the various possibilities offered by our versatile IoT gateway and how the platform can be used to integrate advanced control mechanisms from research works.
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Papers by Mamour Diop