Performance Evaluation of NOMA for Sidelink Cellular-V2X Mode 4 in Driver Assistance System With Crash Warning
Performance Evaluation of NOMA for Sidelink Cellular-V2X Mode 4 in Driver Assistance System With Crash Warning
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DOI：
10.1109/access.2020.3023721
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发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Takeshi Hirai;T. Murase
中科院分区：
文献类型：
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作者：
Takeshi Hirai;T. Murase
本文介绍了一种潜在的扩展侧链路蜂窝车辆到一切模式4（简称模式4）与上行链路非正交多址接入（UL-NOMA），命名为SPS-NOMA，在驾驶员辅助系统与碰撞警告的性能特点。在SPS-NOMA中，多个节点（例如，具有通信设备的汽车或行人）在由基于感测的半持久调度（基于感测的SPS）（模式4的分布式随机接入协议）选择的时频资源上同时广播它们的数据帧。所发送的信号在接收器侧被叠加，并且连续干扰消除器（SIC）支持对叠加的信号进行解码。在SPS-NOMA中，期望基于感测的SPS在每次SIC迭代时增强信号与干扰加噪声比。该效果提高了SIC在广播情况下的性能增益，并减轻了信道拥塞。我们的计算机模拟表明，SPS-NOMA提高了普通模式4的基本节点分布模型的38%的性能。总之，SPS-NOMA有望成为下一代侧链路C-V2X的扩展模式4。
This article presents the performance characteristics of a potential extension of sidelink cellular-vehicle-to-everything mode 4 (simply called mode 4) with uplink non-orthogonal multiple access (UL-NOMA), named SPS-NOMA, in driver assistance systems with a crash warning. In SPS-NOMA, multiple nodes (e.g., cars or pedestrians with communication equipment) simultaneously broadcast their data frames at a time-frequency resource selected by sensing-based semi-persistent scheduling (sensing-based SPS), the distributed random access protocol of mode 4. The transmitted signals are superposed at the receiver sides, and successive interference canceller (SIC) supports decoding the superposed signal. In SPS-NOMA, sensing-based SPS is expected to enhance the signal-to-interference-plus-noise ratio at each SIC iteration. The effect boosts the performance gains of the SIC in broadcast cases and mitigates the channel congestion. Our computer simulations highlighted that SPS-NOMA improved the performance of the ordinary mode 4 by 38% in the fundamental node distribution model. In conclusion, SPS-NOMA is expected to be the next generation sidelink C-V2X as the extended mode 4.