scholarly journals Encrypted Vehicular Communication Using Wireless Controller Area Network

2019 ◽  
Vol sceeer (3d) ◽  
pp. 17-24
Author(s):  
Mohammed Al-Qaraghuli ◽  
Saadaldeen Ahmed ◽  
Muhammad Ilyas
Keyword(s):  
Network Performance ◽  
Autonomous Vehicle ◽  
Data Rate ◽  
Controller Area Network ◽  
Area Network ◽  
Vehicular Communication ◽  
Communication Algorithms ◽  
Wide Range ◽  
The Impact ◽  
Better Than

In this paper, we focus on ensuring encrypted vehicular communication using wireless controller area network performance at high node densities, by means of Dedicated Short-Range Communication (DSRC) algorithms. We analyses the effect of the vehicular communication parameters, message-rate, data-rate, transmission power and carrier sensing threshold, on the application performance. After a state-of-the-art analysis, we propose a data-rate DSRC algorithm. Simulation studies show that DSRC performs better than other decentralized vehicular communication algorithms for a wide range of application requirements and densities. Vehicular communication plays one of the most important roles for future autonomous vehicle. We have systematically investigated the impact of vehicular communication using the MATLAB© application platform and achieved an accuracy of 93.74% after encrypting all the communications between the vehicles and securing them by applying the encryption on V2V communication in comparison with the existing system of Sensor Networks which stands at 92.97%. The transmission time for the encryption is 165 seconds while the rate of encryption is as low as 120 Mbps for the proposed awareness range of vehicles to vehicle using DSRC algorithm in Wireless-Controller Area Network for communication. Experimental results show that our proposed method performs 3% better than the recently developed algorithms.

scholarly journals Performance Analysis of Wireless Local Area Network for a High-/Low-Priority Traffic Ratio at Different Numbers of Access Categories

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 693
Author(s):  
Kvitoslava Obelovska ◽  
Olga Panova ◽  
Vincent Karovič
Keyword(s):  
Network Performance ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Large Network ◽  
Medium Access ◽  
Massive Growth ◽  
Adaptive Adjustment ◽  
The Impact

The performance of Wireless Local Area Network (WLAN) is highly dependent on the processes that are implemented in the Medium Access Control (MAC) sublayer regulated by the IEEE 802.11 standard. In turn, various parameters affect the performance of the MAC sublayer, the most important of which is the number of stations in the network and the offered load. With the massive growth of multimedia traffic, research of the network performance depending on traffic types is relevant. In this paper, we present the impact of a high-/low-priority traffic ratio on WLAN performance with different numbers of access categories. The simulation results show different impact of high-/low-priority traffic ratio on the performance of the MAC sublayer of wireless LANs depending on different network-sizes and on network conditions. Performance of the large network with two access categories and with the prevalent high-priority traffic is significantly higher than in the case of using four categories on the MAC sublayer. This allows us to conclude that the performance improvement of the large network with the prevalent high-priority traffic can be achieved by an adaptive adjustment of the access categories number on the MAC sublayer.

Hybrid FlexRay/CAN Automotive Networks

2013 ◽  
pp. 323-342
Author(s):  
Rodrigo Lange ◽  
Rômulo Silva de Oliveira
Keyword(s):  
Communication Networks ◽  
Exponential Growth ◽  
Information Exchange ◽  
Controller Area Network ◽  
Area Network ◽  
Vehicular Communication ◽  
Control Units ◽  
Vehicular Communication Networks ◽  
Automotive Networks ◽  
Embedded Applications

In recent years, the automotive industry has witnessed an exponential growth in the number of vehicular embedded applications, leading to the adoption of distributed implementations for systems in the powertrain and chassis domains. The Controller Area Network (CAN) protocol has been a de facto standard for intra-vehicular communications, while the FlexRay Communication System is being promoted as the future de facto standard for network interconnections of applications related to X-by-wire systems. Due to the characteristics of CAN and FlexRay, the coexistence of both protocols in the same vehicle is expected, leading to the use of gateways to manage the information exchange between electronic control units connected to different network segments. This chapter describes the main characteristics of CAN and FlexRay protocols, surveying the literature addressing schedulability and time analysis in both FlexRay and CAN protocols. The chapter also outlines the state-of-the-art in research about gateways for intra-vehicular communication networks.

Study on Nozzle Array Structure Fluidic Gyroscope

2012 ◽  
Vol 542-543 ◽  
pp. 727-730
Author(s):  
Chuan Zhi Mei ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Bao Li Zhang ◽  
Xia Ding ◽  
...  
Keyword(s):  
Angular Velocity ◽  
Sensitive Element ◽  
Impact Resistance ◽  
Measurement Range ◽  
Test Results ◽  
Velocity Difference ◽  
Wide Range ◽  
Array Structure ◽  
The Impact ◽  
Better Than

This paper reports about a nozzle array structure fluidic gyroscope. The gyro used setting sub-nozzle around the main nozzle to inhibit the attenuation which had been caused by the main nozzle jet column spread out and to increase the angular velocity difference of sensitive element in the thermal resistance wire when the jet flow rate had been input, thereby to improve the performance of the jet gyro. The test results showed that: a resolution of better than 0.1°/s nozzle formation jet gyro sensitivity better than 10mv/(0.1°/s), the measurement range is better than ± 60°/s; non-linearity of better than 1%.The impact of the gyroscope impact resistance capability, small size and wide range of applications.

scholarly journals DEVELOPMENT AND ANALYSIS OF A BLOCKCHAIN SYSTEM BASED ON JAVASCRIPT

T-Comm ◽  
2021 ◽  
Vol 15 (2) ◽  
pp. 40-45
Author(s):  
Vasiliy S. Elagin ◽  
◽  
Vladimir I. Fedorovskikh ◽  
Anastasia V. Spirkina ◽  
◽  
...  
Keyword(s):  
Programming Language ◽  
Quantitative Assessment ◽  
Network Performance ◽  
Distributed Database ◽  
Performance Characteristics ◽  
Network Infrastructure ◽  
Blockchain Technology ◽  
Wide Range ◽  
The Impact

The paper describes the main features of blockchain technology, provides the main areas of use of this technology. Today, blockchain has evolved into a reliable and secure way to store and record transactions across a wide range of application domains. However, the impact of existing solutions on the current network infrastructure needs to be considered. The authors propose to create a system for generating and storing blockchain traffic based on the JavaScript programming language. This solution cannot be applied to cryptocurrencies, but it allows you to evaluate the work of a distributed database based on blockchain technology. The aim of the work is to analyze the delays in the generation and distribution of traffic between various numbers of nodes and the dependence of the speed of distribution and block generation on the performance of computers. The paper also considered the algorithm for joining a new node to the cluster and sending a new block to the blockchain, as well as the scheme of a node in a blockchain cluster, and presented the results of an experiment with a quantitative assessment of network performance characteristics.

scholarly journals Content-based dynamic superframe adaptation for Internet of Medical Things

2020 ◽  
Vol 16 (2) ◽  
pp. 155014772090703 ◽  
Author(s):  
Yousaf Zia ◽  
Arshad Farhad ◽  
Faisal Bashir ◽  
Kashif Naseer Qureshi ◽  
Ghufran Ahmed
Keyword(s):  
Resource Utilization ◽  
Network Performance ◽  
Ieee 802.15.4 ◽  
Optimal Solution ◽  
Area Network ◽  
Healthcare Applications ◽  
Adaptation Algorithm ◽  
Wide Range ◽  
Internet Of Medical Things ◽  
Dynamic Superframe

IEEE 802.15.4 standard is widely used as a communication protocol by low-powered devices, including Internet of Medical Things–enabled technologies. These low-powered technologies have the ability to integrate several communicating and interacting devices for the purpose of wide range applications such as Smart homes and healthcare applications. However, the fixed superframe structure of IEEE 802.15.4 results in the unequal resource utilization among these low-powered heterogeneous Internet of Things devices. The low resource utilization degrades the network performance. In order to improve the network performance and optimum resource utilization, dynamic superframe approach is recommended. This article presents a content-based dynamic superframe adaptation algorithm for the low-powered Internet of Medical Things devices to address the resource utilization challenges. In the content-based dynamic superframe adaptation, the network coordinator dynamically adjusts the superframe along with the backoff exponent. It uses five Quality of Service metrics simultaneously: the application defined data traffic, receive ratio, Personal Area Network source nodes in numbers, number of collisions, and observed delay to achieve the optimal solution. A detailed analysis of the simulations shows that the content-based dynamic superframe adaptation is able to behave more intelligently to adjust superframe dynamic allocations according to the application’s content requirements. Moreover, it outperforms the other existing schemes in achieving the better resource utilization in IEEE 802.15.4 framework.

scholarly journals Censuses of agriculture and COVID-19: Global situation and lessons

2020 ◽  
Vol 36 (4) ◽  
pp. 861-865
Author(s):  
Jairo Castano
Keyword(s):  
Data Collection ◽  
Census Data ◽  
Working Environment ◽  
Physical Contact ◽  
Training Methods ◽  
Wide Range ◽  
The Status ◽  
Statistical Systems ◽  
The Impact ◽  
Better Than

A review of the status of censuses of agriculture in 150 countries and territories shows that the impact of COVID-19 has not discriminated between developed and developing countries. However, some countries have fared better than others when faced with the challenges posed by the pandemic. Earlier improvements in national statistical systems, a wide range of ICT solutions and the sourcing of census data from administrative registers have enabled these countries to significantly reduce their reliance on physical contact for tasks such as final preparation of field activities, training and data collection. The experience has confirmed the usefulness of these efforts and will likely further accelerate the pace of innovation, even though most of these countries expect that farmers’ non-response rates will be higher than in the past. At the same time, the COVID-19 crisis has been a lesson to other countries on the need to improve the working environment, diversify census data collection and training methods, and make use of administrative registers in future census rounds.

Performance Analysis of a Novel 2-D Code in the Network Access Segment

2020 ◽  
Vol 41 (4) ◽  
pp. 411-419
Author(s):  
Ajay Yadav ◽  
Subrat Kar ◽  
V. K. Jain
Keyword(s):  
Error Probability ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Code Length ◽  
Network Access ◽  
Large Cardinality ◽  
Quadratic Congruence ◽  
The Impact ◽  
Better Than

AbstractIn this paper, the performance of one-coincidence frequency hopping code/quadratic congruence code (OCFHC/QCC) is analysed and compared with the existing codes. The impact of variation in code weight, code length and number of wavelengths on error probability is evaluated. It is observed that for the same code weight, code length and number of available wavelengths, error probability of OCFHC/QCC is better than the existing codes under certain conditions. The large cardinality, simple design methodology and good performance suggest its use in local area network, multi-code keying and multi-rate multimedia applications.

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