Science Foundation Ireland

CONNECT research highlights – December 2021

Here are some high-impact publications from CONNECT’s researchers…

 

Title: 5G NR-V2X: Toward Connected and Cooperative Autonomous Driving
Authors:Hamidreza Bagheri, Md Noor-A-Rahim, Zilong Liu, Haeyoung Lee, Dirk Pesch, Klaus Moessner and Pei Xiao
Journal: IEEE Communications Standards Magazine

What’s this paper about?
The fifth generation (5G) mobile communication system has been touted as a key enabling technology for the genuine realization of autonomous driving. While research on 5G is progressing rapidly, a systematic overview on the role of 5G in future vehicular networks is missing. To fill this gap and to spark future research, this article introduces the key technology components of 5G to enable future connected and cooperative autonomous driving.

What have you discovered?
The advanced features (e.g., highly reliable, low latency, and highly scalable connectivity) of 5G will be a game-changer in opening the door to new opportunities, services, applications, and a wide range of use cases in autonomous vehicles. There are however some challenges that need to be resolved before autonomous driving enabled by 5G can be fully realized. This article presents and analyses a number of such challenges, such as rapidly varying vehicular environments due to vehicle mobility increasing the system design complexity for an end-to-end network. For the design of vehicular networks in such a dynamic environment, machine learning can be an extremely useful tool.

So what?
With its enormous potential, 5G is expected to be a transformative technology for fully connected vehicular networks. Researchers will benefit from this work in gaining insight into 5G-based vehicular networks, challenges, and future directions to advance the research in autonomous driving.

Read the full paper here (pdf).

 

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Title: Thermoreflectance Imaging of Semiconductor Lasers With a Numerical Thermal Model
Authors: IEEE Journal of Selected Topics in Quantum Electronics ( Volume: 28, Issue: 1, Jan.-Feb. 2022)
Journal:Robert McKenna, Simon Corbett, Sepideh T. Naimi, Dovydas Mickus, David McCloskey, and John F. Donegan

What’s this paper about?
Semiconductor laser power the internet carrying vast quantities of data each day. These devices operate in a range of environments in which their temperature can vary dramatically. The energy efficiency of such devices will be a major focus in the coming decade where millions of such devices will be used in data centres for example.

What have you discovered?
We have developed a novel imaging technique that allows us to map out the temperature profile in such devices. We can now profile the temperature in such lasers with sub-micron precision and see how changes in ambient temperature and in the power to the laser affects the temperature profile. This paper was published in a special issue of this journal dedicated to Semiconductor Laser d`evices.

So what?
The energy requirements of the internet are growing at an alarming rate and much be tackled. This means improved efficiency right down to the device level. The temperature maps we now have allow us to operate these lasers in a new way that will reduce their energy needs. This result will find impact in all areas of communications in which semiconductor lasers are utilized.

Read the full paper here (pdf).