To facilitate 5G application and ensure compatibility of 5G mobile communication with other radio services in the frequency band of 2100MHz, MIIT released on 4 March the Technical requirements for radio frequency of 5G mobile communication base station in the frequency band of 2100MHz (trial) (hereinafter, the “regulation”).

The regulation allocates 1920-1980MHz for 5G base station to receive signals while 2110-2170MHz for emitting signals. It also provides the limits for out-of-band unwanted emissions and spurious emissions to reduce the possibility of interference that 5G systems may bring. With respect to requirements on other technical parameters, like base station’s transmission power tolerance, adjacent channel rejection ratio, spectrum emission mask, bandwidth occupied, transmitter intermodulation, total power dynamic range, error vector magnitude (EVM), frequency error, etc., the regulation highlights that relevant sector standards or 3GPP standards, either for technical requirements or for test methods, shall be follow. It is because all Chinese 5G standards are sector standards and are identical to their 3GPP counterparts. Following either will not lead to discrepancy.