FR1:从Sub6G到Sub7G 前段时间听说3GPP更改了FR1的频率范围,从6GHz提升到了7GHz,回头核对了规范,果然在最新的R16的TS38.104规范中看到,FR1的范围从450M~6000MHz扩展到了415M~7125MHz。 接下来想了解一下什么时候和什么原因下更改了频率范围。 首先经过核查,是2019年Q1发布的R15.05中,扩展了FR1的范围。 再查TS38.104的f50版本,看到是RAN4 #90上的R4-1902338引发了FR1的修改。 再继续查R4-1902338(https://www.3gpp.org/ftp/TSG_RAN/WG4_Radio/TSGR4_90/Docs/R4-1902338.zip),并且根据TS38.101的类似文件R4-1902339(https://www.3gpp.org/ftp/TSG_RAN/WG4_Radio/TSGR4_90/Docs/R4-1902339.zip),找到了源头: R4-1900026(https://www.3gpp.org/ftp/TSG_RAN/WG4_Radio/TSGR4_90/Docs/R4-1900026.zip),其中提到: During TSG RAN#82(2018Q4) the principle of extending the upper limit of FR1 from 6GHz to 7.125GHz was agreed. This decision is in relation to the NR-U Rel-16 WI to include the 6GHz frequency ranges considered for unlicensed operations by regulators (e.g., US 5.925 – 7.125 GHz, or European 5.925 – 6.425 GHz, or parts thereof) in its scope. 从这里不难看出,Sub7G和中国没有什么关系。 |
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