| 1. |
- Alves, H. B. M., et al.
(författare)
-
Introducing a survey methodology for assessing LoRaWAN coverage in Smart Campus scenarios
- 2020
-
Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728148922 ; , s. 708-712
-
Konferensbidrag (refereegranskat)abstract
- The LoRa is a Low Power Wide Area Network (LPWAN) technology. It has been proposed as a viable wireless connection method for the implementation of the Internet of Things (IoT), thanks to its wide coverage, low complexity and low energy consumption. Several studies ave been carried out about real coverage performance. In this article, a new test methodology for the experimental evaluation of LoRaWAN coverage within a smart campus is presented. The new approach consists in the definition of devices, method and procedures. The architecture of the mobile node is outlined. The survey procedure is based on a mapping phase, necessary to highlight the LoRaWAN coverage in the test area. Finally, a use case is described in the article: it is not intended for evaluating a specific implementation, but for assessing the suitability of the proposed methodology. The use case results demonstrate the effectiveness of the survey methodology in a real smart campus. © 2020 IEEE.
|
|
| 2. |
- Silva, D. R. C., et al.
(författare)
-
IoT framework with flexible management of multi-protocol nodes for redundancy applications
- 2021
-
Ingår i: 2021 IEEE International Workshop on Metrology for Industry 4.0 and IoT, MetroInd 4.0 and IoT 2021 - Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781665419802 ; , s. 677-681
-
Konferensbidrag (refereegranskat)abstract
- The spreading of IoT in every applications triggered the creation of many IoT frameworks. Many of them are compatible with several transmission protocols to collect data from IoT end-nodes (e.g. sensors/actuators). This paper introduces a new approach for the management of multi-protocol IoT architecture with redundancy features. Assuming the functional view diagram of IoT Architecture reference project (IoT-A), adaptations in communication and management functional blocks have been introduced to support redundancy based on multi-protocol and all the related management issues. The main goal is to keep this feature transparent for the rest of the system, which includes the application and its users. An experimental setup was designed and experiments were carried out to demonstrate feasibility and to characterize performance of the proposed solution. The results show that, with the multi-protocol redundancy activated, the IoT framework is capable of transparently delivering more information to the user application. © 2021 IEEE.
|
|
| 3. |
- Almeida, N. C., et al.
(författare)
-
Proposal of a Hybrid LoRa Mesh / LoRaWAN Network
- 2020
-
Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728148922 ; , s. 702-707
-
Konferensbidrag (refereegranskat)abstract
- There is a recent interest in the deployment of Low Power Wide Area Networks (LPWANs), such as LoRaWAN, to support Internet of Things (IoT) applications. Even though the main advantage of these LPWANs are the long rage communication, the challenge of providing seamless and shadow area coverage still remains. This paper presents a proposal of a hybrid LoRa Mesh/LoRaWAN network to cope with this challenge. In this proposal, a mesh network of LoRa nodes are connected to a Proxy node that works as a mesh coordinator and is also connected to the LoRaWAN network. The advantage of this topology is the improvement of the communication coverage in shadow areas where a regular LoRaWAN node cannot be reachable in cases of obstacles or topography. The development of the LoRa Mesh network as well as the routing mechanism are presented and verified with experimental results. Finally, the integration of the LoRa Mesh with the LoRaWAN networks is discussed and a proposal is presented. © 2020 IEEE.
|
|
| 4. |
- Ferrari, P., et al.
(författare)
-
Work-in-Progress : Compromising Security of Real-time Ethernet Devices by means of Selective Queue Saturation Attack
- 2020
-
Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728152974
-
Konferensbidrag (refereegranskat)abstract
- The industrial control systems (ICS) are using Real-Time Ethernet (RTE) protocols for many years. Today, Ethernet based control systems are widely used in industries. The Time Sensitive Networking (TSN) initiative will definitely push their further diffusion. With the introduction of Industry 4.0, production machines and their components have been connected to the Internet. Currently adopted RTE protocols do not require authentication, and hence may exchange data also with potentially malicious partners. In this paper, a selective Denial of Service (DoS) attack is presented. The proposed Selective Queue Saturation Attack (SQSA) is aimed to jam the message queue of the RTE communication stack in selected devices. The SQSA minimizes the chances of being detected by keeping its requirements (in term generated traffic) as low as possible. The SQSA has been applied to a real scenario based on PROFINET. The results of the use case demonstrate: the feasibility of the proposed attack; the reduced footprint compared to known DoS attacks (more than one thousand times less); and the selectivity of the attack, which can disrupt the realtime behavior of even a single target node inside the RTE network. © 2020 IEEE.
|
|
| 5. |
- Turcato, A. C., et al.
(författare)
-
Introducing a cloud based architecture for the distributed analysis of Real-Time Ethernet traffic
- 2020
-
Ingår i: Proceedings. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728148922 ; , s. 235-240
-
Konferensbidrag (refereegranskat)abstract
- The use of industrial communication protocols based on Real-Time Ethernet (RTE) standards is completely replacing traditional industrial fieldbuses. As usual, when a technology becomes mature, the need of efficient diagnostic and maintenance tools quickly raises. Very often, following the paradigm of Industry 4.0, the most effective diagnostic systems are today based on distributed, cloud-centric, architectures and artificial intelligence. However, the distributed analysis of RTE systems is challenging, considering the plurality of protocols and the stringent cost constrains which are common in industry. In this paper, a new architecture for the distributed analysis of RTE networks is proposed, leveraging on distributed probes that send traffic samples to Matlab cloud for remote analysis. The paper also proposes a software conversion tool to adapt general PCAP files captured by popular sniffers (e.g. Wireshark) into MAT file for easier Matlab elaboration. Last, a test bench for characterization (in terms of transfer delays) of the first part of the chain for RTE traffic sampling is described. The results show that in less than 10 seconds it is possible to transfer chunks of RTE traffic data (captured on industrial networks with hundreds of real-time devices) directly to the cloud and to have them converted in Matlab format. © 2020 IEEE.
|
|
| 6. |
- Viti, Leonardo, et al.
(författare)
-
High-speed hBN/graphene/hBN room-temperature terahertz nano-receivers
- 2021
-
Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. ; SPIE 11685
-
Konferensbidrag (refereegranskat)abstract
- We report room temperature terahertz detection in hBN/graphene/hBN heterostructures. The obtained record combination of high-speed (response time < 1 ns) and high sensitivity (noise equivalent power ~ 100 pWHz-1/2) is enabled by the photo-thermoelectric effect.
|
|
| 7. |
- Viti, Leonardo, et al.
(författare)
-
High-speed, low-noise thermoelectric graphene detectors at terahertz frequencies
- 2020
-
Ingår i: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. - 2162-2027 .- 2162-2035. ; 2020-November, s. 302-302
-
Konferensbidrag (refereegranskat)abstract
- We report room temperature terahertz detection in hBN/graphene/hBN heterostructures, integrated in top-gated field effect transistors. The record combination of high-speed (response time < 1 ns) and high sensitivity (noise equivalent power ~ 100 pWHz-1I2) is enabled by the photo-thermoelectric effect and paves the way for the design of ultrafast graphene arrays in the far infrared, opening concrete perspectives for targeting ultrafast applications.
|
|
