over a short range without relying on the cellular network. So, latency-sensitive basic safety messages aimed at improving road safety and traffic efficiency are conveyed using the direct communication mode operating on the globally1 harmonized 5.9 GHz ITS spectrum. As C-V2X technology continues to evolve, the 3GPP Release 16 NR C‑V2X direct communication mode (or sidelink) specifications2 will support advanced use cases that could enhance autonomous driving, once again, without using the cellular network.
https://www.qualcomm.com/news/onq/2020/03/31/how-nr-based-sidelink-expands-5g-c-v2x-support-new-advanced-use-cases
现在大家熟悉 wifi 802.11 使用的无线电频段 2.4 GHz 和 5 GHz。LTE手机使用的 500 - 3000 MHz 更是常用,尽管通常没人注意 4G 使用的频段。 过去大家可能熟悉 100 - 10000 kHz 的广播频段。 未来我们可能会用上 5.9 GHz 频段。
不知读者中是否有对未来 5.9 GHz 频段使用有了解的? 是像 wifi 一样可以让大家随意使用,还是像 LTE 手机必须用运营商的sim卡呢?