Accurate channel modeling and simulation tools are vital for studying sub-THz and millimeter (mmWave) wideband communication system performance. To accurately design future high data rate, low latency wireless modems, the entire protocol stack must be appropriately modeled to understand how the physical layer impacts the end-to-end performance experienced by the end user. This paper presents a full stack end-to-end performance analysis in ns-3 using drop-based NYU channel model (NYUSIM) and 3GPP statistical channel model (SCM) in scenarios, namely urban microcell (UMi), urban macrocell (UMa), rural macrocell (RMa), and indoor hotspot (InH) at 28 GHz with 100 MHz bandwidth. Video data is transmitted at 50 Mbps using User Datagram Protocol (UDP), and we observe that the RMa channel is benign in non-line of sight (NLOS) for NYUSIM and 3GPP SCM as it exhibits no packet drops and yields maximum throughput (48.1 Mbps) and latency of $\sim$ 20 ms. In NLOS, for NYUSIM, the UMa and RMa channels are similar in terms of throughput and packet drops, and the latency in UMi and InH scenarios is 10 times and 25 times higher respectively compared to UMa. Our results indicate that mmWave bands can support data rates of 50 Mbps with negligible packet drops and latency below 150 ms in all scenarios using NYUSIM.
翻译:精确的信道建模与仿真工具对于研究亚太赫兹和毫米波宽带通信系统的性能至关重要。为精确设计未来高数据率、低延迟的无线调制解调器,必须对整个协议栈进行适当建模,以理解物理层如何影响最终用户所体验的端到端性能。本文在ns-3平台上,分别采用基于快照的纽约大学信道模型(NYUSIM)和3GPP统计信道模型(SCM),在28 GHz频段、100 MHz带宽下,针对城市微蜂窝(UMi)、城市宏蜂窝(UMa)、乡村宏蜂窝(RMa)和室内热点(InH)场景开展了全栈端到端性能分析。视频数据以50 Mbps速率通过用户数据报协议(UDP)传输。观测结果表明,在非视距(NLOS)环境下,NYUSIM和3GPP SCM的RMa信道特性较为温和,未出现数据包丢失现象,并实现了最大吞吐量(48.1 Mbps)及约20 ms的延迟。在NLOS环境下,对于NYUSIM模型,UMa和RMa信道在吞吐量和丢包率方面表现相似,而UMi和InH场景的延迟分别比UMa场景高10倍和25倍。我们的结果表明,采用NYUSIM模型时,毫米波频段在所有场景下均可支持50 Mbps的数据传输速率,且数据包丢失可忽略不计,延迟低于150 ms。