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Performance Analysis and Optimization for Semi-Persistent Scheduling in C-V2X
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DOI：10.1109/TVT.2022.3223414.png)
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摘要
En 中文
For periodical beacon broadcasting in cellular vehicle-to-everything (C-V2X) networks, a distributed reservation media access control (MAC) protocol, the sensing-based semi-persistent scheduling (SPS), is adopted. However, how to quantify the communication reliability and latency is an open issue, which is critical for low-latency and high-reliability services. In this paper, an analytical model for SPS is presented, based on which the impacts of beacon rate, range settings and system configuration on access collision probability and delay outage probability are quantified. The analytical model provides important insights and guideline to adapt and optimize protocol parameters including the sensing range, transmit power and resource reservation. The enhanced MAC protocol can maintain high-reliability and low-latency services with a wide range of vehicle density. Simulations are conducted to validate the analysis and the results demonstrate that the proposed MAC enhancement solution can reduce collision probability while ensuring the delay outage probability based on service requirements.
Keyword:
Delays
Sensors
Broadcasting
Reliability
Media Access Protocol
Analytical models
Low latency communication
Beacon broadcasting
media access control (MAC)
semi-persistent scheduling (SPS)
cellular vehicle-to-everything (C-V2X)
期刊
IF:
7.1
论文数:
1.8W
被引数:
6.6W
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引用论文
Ultra-Reliable and Low-Latency Communications for Connected Vehicles: Challenges and Solutions互联车辆的超可靠和低延迟通信: 挑战和解决方案.png)
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OAAI分享收藏ATOMIC: Adaptive Transmission Power and Message Interval Control for C-V2X Mode 4IEEE ACCESS
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