V2V Wireless Communication Protocol for Rear-end Collision Avoidance on Highways with Stringent Propagation Delay

2009 ◽  
Author(s):  
K.V.N. Kavitha ◽  
A. Bagubali ◽  
L. Shalini
Keyword(s):  
Wireless Communication ◽  
Collision Avoidance ◽  
Communication Protocol ◽  
Propagation Delay ◽  
Wireless Communication Protocol

scholarly journals treNch: Ultra-Low Power Wireless Communication Protocol for IoT and Energy Harvesting

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6156
Author(s):  
Fernando Moreno-Cruz ◽  
Víctor Toral-López ◽  
Antonio Escobar-Molero ◽  
Víctor U. Ruíz ◽  
Almudena Rivadeneyra ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Wireless Communication ◽  
Low Power ◽  
Communication Protocol ◽  
Power Level ◽  
Power Input ◽  
Security Level ◽  
Current Standard ◽  
Ultra Low Power ◽  
Wireless Communication Protocol

Although the number of Internet of Things devices increases every year, efforts to decrease hardware energy demands and to improve efficiencies of the energy-harvesting stages have reached an ultra-low power level. However, no current standard of wireless communication protocol (WCP) can fully address those scenarios. Our focus in this paper is to introduce treNch, a novel WCP implementing the cross-layer principle to use the power input for adapting its operation in a dynamic manner that goes from pure best-effort to nearly real time. Together with the energy-management algorithm, it operates with asynchronous transmissions, synchronous and optional receptions, short frame sizes and a light architecture that gives control to the nodes. These features make treNch an optimal option for wireless sensor networks with ultra-low power demands and severe energy fluctuations. We demonstrate through a comparison with different modes of Bluetooth Low Energy (BLE) a decrease of the power consumption in 1 to 2 orders of magnitude for different scenarios at equal quality of service. Moreover, we propose some security optimizations, such as shorter over-the-air counters, to reduce the packet overhead without decreasing the security level. Finally, we discuss other features aside of the energy needs, such as latency, reliability or topology, brought again against BLE.

Autonomous Car for Mining 1° ProtoType “ACM1PT”

2015 ◽  
Vol 713-715 ◽  
pp. 901-904
Author(s):  
Mauricio Mauledoux ◽  
Juan C.M. Hernández ◽  
Oscar F.S. Avilés ◽  
Hoffman F. Ramirez G.
Keyword(s):  
Wireless Communication ◽  
Mobile Robots ◽  
Autonomous System ◽  
Communication Protocol ◽  
Human Intervention ◽  
Robotic Platform ◽  
Unstructured Environments ◽  
Wireless Communication Protocol ◽  
Work Tasks ◽  
Search For Information

The project aims to design and build a robotic platform, capable of uploading tools for drilling exploration processes in unstructured environments. With the characteristic of being maneuvered remotely through a wireless communication protocol and a support system to allow new routes autonomously, without human intervention. During the last 4 years the research group DAVINCI has acquired knowledge in the search for information and has developed three mobile remotely controlled for a specific purpose, to neutralize the explosives and manipulate objects platforms. The information held for the development of mobile robots can be extrapolated to other functions, can be applied to other work tasks can be mining, agriculture and exploration. For the particular case the project to develop a robot that I carried out in mining support tasks remotely by tele-operation and support of autonomous system is presented.

scholarly journals Developing a Smart Device for Measuring and Monitoring Ammonia Concentration

2020 ◽  
Vol 30.8 (147) ◽  
pp. 7-13
Author(s):  
Thanh BUI Dang ◽  
◽  
Van Truong PHAM ◽  
Huy Phuong NGUYEN
Keyword(s):  
Signal Processing ◽  
Wireless Communication ◽  
Communication Protocol ◽  
Ammonia Concentration ◽  
Smart Device ◽  
Joint Stock Company ◽  
Ammonia Sensor ◽  
Stock Company ◽  
Wireless Communication Protocol ◽  
Monitor Data

This paper presents an approach for design and realization of a smart device for measuring and monitoring ammonia concentration. The developed system included two parts: hardware and software, in which the hardware of the system has been developed based on the ATMEGA328P microcontroller in order to collect data from the ammonia sensor MQ135. Meanwhile, the software is developed for signal processing and warning according to different thresholds. Collected data by the system is then transmitted to a computer via the wireless communication protocol. In addition, an interface is also designed on computers to collect and monitor data from sensors. The developed system allows to measure ammonia concentration up to 300ppm and has been tested not only at the laboratory but also at NPK factory of Lamthao Fertilizers and Chemicals Joint Stock Company. Experimental results show the desired performances of the developed system.

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