Toward Throughput Optimization: A Congestion Control Scheme for CAM Delivery via NR Sidelink

In the new radio (NR) vehicle-to-everything (V2X), congestion control (CC) is adopted to reduce channel occupancy and improve delivery performance. However, most existing CC schemes decide to adjust the number of messages while ignoring the throughput requirements, which may lead to serious traffic...

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Vydáno v:IEEE internet of things journal Ročník 12; číslo 9; s. 12206 - 12218
Hlavní autoři: Fu, Qiang, Liu, Jiajia, Wang, Jiadai, Kong, Jun
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 01.05.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
3GPP
Automation
Configurations
Congestion control (CC)
effective throughput
Encoding
Interference
Internet of Things
Long Term Evolution
Measurement
Messages
modulation and coding scheme (MCS)
new radio (NR) sidelink
Optimization
Resource allocation
Resource scheduling
Roads
semi-persistent scheduling (SPS)
Sidelink
Throughput
Traffic accidents
Tuning
Vehicle-to-everything
ISSN:2327-4662, 2327-4662
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Popis
Shrnutí:In the new radio (NR) vehicle-to-everything (V2X), congestion control (CC) is adopted to reduce channel occupancy and improve delivery performance. However, most existing CC schemes decide to adjust the number of messages while ignoring the throughput requirements, which may lead to serious traffic accidents due to the loss of information. In light of this, we investigate the performance of cooperative awareness messages (CAMs) delivery via NR sidelink under different CC configurations, including the modulation and coding scheme, the semi-persistent scheduling-based resource allocation, as well as the CAM transmission period. Specifically, taking into account these configurations, we develop a theoretical framework to capture two metrics of CAM delivery, namely the effective throughput and the channel busy ratio, based on the stochastic geometry approach. With the help of this framework, we propose the CC-(m,n,<inline-formula> <tex-math notation="LaTeX">\tau </tex-math></inline-formula>) scheme, which is able to optimize the two metrics simultaneously by properly tuning the parameters m, n, and <inline-formula> <tex-math notation="LaTeX">\tau </tex-math></inline-formula>. Extensive numerical results show that the proposed scheme is highly beneficial for efficient and reliable CAM delivery via NR sidelink, particularly in scenarios with high vehicle densities.
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ISSN:2327-4662
2327-4662
DOI:10.1109/JIOT.2024.3519771