Method for reducing interference between radar and uplink frequency band and communication apparatus

1 . A method for reducing interference between a radar and an uplink frequency band, the method comprising:

detecting a characteristic of a radar signal transmitted by the radar in the uplink frequency band, the radar signal being received by a first network device of a cellular communication network or a second network device of the cellular communication network, wherein the cellular communication network comprises the first network device, the second network device, and one or more first terminal devices separate from the first network device and the second network device, the second network device is communicatively coupled to the first network device, the radar is separate from the cellular communication network, and detecting the characteristic of the radar signal comprises processing, by the first network device or the second network device, a signal in the uplink frequency band based on a radar signal identification method, the signal comprising the radar signal;

determining, by the first network device, a protection measure based on the characteristic of the radar signal;

reducing, by the first network device, interference between the radar signal and the uplink frequency band by using the protection measure; and

communicating, by the first network device, with the one or more first terminal devices of the cellular communication network through the uplink frequency band, wherein communicating with the one or more first terminal devices comprises receiving one or more wireless uplink signals in the uplink frequency band from the one or more first terminal devices.

2 . The method according to claim 1 , wherein the detecting the characteristic comprises:

detecting, by the second network device, the characteristic of the radar signal; and

receiving, by the first network device, the characteristic of the radar signal from the second network device.

3 . The method according to claim 1 , wherein the characteristic of the radar signal comprises a transmission cycle of the radar signal, a location of a frequency domain resource of the radar signal, and/or energy of interference to the first network device in the transmission cycle and/or on the frequency domain resource.

4 . The method according to claim 3 , wherein the protection measure comprises:

adjusting, by the first network device, a length and/or a location of a cyclic prefix (CP), to enable the radar signal to fall in the CP.

5 . The method according to claim 3 , wherein the protection measure further comprises:

deactivating an intermediate radio frequency device corresponding to the frequency domain resource.

6 . The method according to claim 3 , wherein the protection measure comprises:

adjusting a downtilt of an antenna of the first network device, to enable interference from the radar signal to the first network device to be less than a third threshold.

7 . A non-transitory computer-readable storage medium storing a computer program comprising computer-executable instructions; and when the computer-executable instructions are executed, the method according to claim 1 is implemented.

8 . A communication apparatus comprising:

a receiver configured to receive a radar signal transmitted by a radar;

a non-transitory memory storing a program; and

a processor coupled to the non-transitory memory and configured to execute the program to detect a characteristic of the radar signal in an uplink frequency band from the radar signal, wherein the program comprises instructions that when executed by the processor cause the communication apparatus to:

determine a protection measure based on the characteristic of the radar signal, wherein the communication apparatus is part of a cellular communication network, the cellular communication network comprises the communication apparatus and one or more first terminal devices separate from the communication apparatus, the radar is separate from the cellular communication network, the characteristic of the radar signal is determined by processing a signal in the uplink frequency band based on a radar signal identification method, and the signal comprises the radar signal;

reduce interference between the radar signal and the uplink frequency band by using the protection measure; and

communicate with the one or more first terminal devices of the cellular communication network through the uplink frequency band, wherein communicating with the one or more first terminal devices comprises receiving one or more wireless uplink signals in the uplink frequency band from the one or more first terminal devices.

9 . The communication apparatus according to claim 8 , wherein the characteristic of the radar signal comprises a transmission cycle of the radar signal, a location of a frequency domain resource of the radar signal, and/or energy of interference to the communication apparatus in the transmission cycle and/or on the frequency domain resource.

10 . The communication apparatus according to claim 9 , wherein the instructions to determine the protection measure further comprise instructions to:

in the transmission cycle of the radar signal, stop user scheduling in a cell corresponding to the uplink frequency band, or indicate that an uplink transmit power of the one or more first terminal devices in the transmission cycle does not exceed a first threshold;

adjust a length and/or a location of a cyclic prefix (CP), to enable the radar signal to fall in the CP; or

adjust a quantity and/or locations of one or more GAP symbols, to enable the radar signal to fall on the one or more GAP symbols.

11 . The communication apparatus according to claim 9 , wherein the instructions to determine the protection measure further comprise instructions to:

deactivate an intermediate radio frequency device corresponding to the frequency domain resource, or adjust a cell system bandwidth or a bandwidth part BWP in the uplink frequency band, to avoid the frequency domain resource or indicate that an uplink transmit power of the one or more first terminal devices on the frequency domain resource does not exceed a second threshold; or

skip scheduling the frequency domain resource, or preferentially allocate the frequency domain resource to a near-point user in a cell corresponding to the uplink frequency band.

12 . The communication apparatus according to claim 9 , wherein the instructions to determine the protection measure further comprise instructions to adjust a downtilt of an antenna of the communication apparatus, to enable interference from the radar signal to the communication apparatus to be less than a third threshold.

13 . A non-transitory computer-readable storage medium storing computer instructions; and when the computer instructions are executed on a computer, the computer executes a method for reducing interference between a radar and an uplink frequency band, the method comprising:

detecting a characteristic of a radar signal transmitted by the radar in the uplink frequency band, the radar signal being received by a first network device of a cellular communication network or a second network device of the cellular communication network, wherein the cellular communication network comprises the first network device, the second network device, and one or more first terminal devices separate from the first network device and the second network device, the second network device is communicatively coupled to the first network device, the radar is separate from the cellular communication network, and detecting the characteristic of the radar signal comprises processing, by the first network device or the second network device, a signal in the uplink frequency band based on a radar signal identification method, the signal comprising the radar signal;

determining, by the first network device, a protection measure based on the characteristic of the radar signal;

reducing, by the first network device, interference between the radar signal and the uplink frequency band by using the protection measure; and

communicating, by the first network device, with the one or more first terminal devices of the cellular communication network through the uplink frequency band, wherein communicating with the one or more first terminal devices comprises receiving one or more wireless uplink signals in the uplink frequency band from the one or more first terminal devices.

14 . The method according to claim 3 , wherein the protection measure comprises:

in the transmission cycle of the radar signal, stopping, by the first network device, user scheduling in a cell corresponding to the uplink frequency band.

15 . The method according to claim 3 , wherein the protection measure comprises:

indicating that an uplink transmit power of the one or more first terminal devices in the transmission cycle does not exceed a first threshold.

16 . The method according to claim 3 , wherein the protection measure comprises:

adjusting, by the first network device, a quantity and/or locations of one or more GAP symbols, to enable the radar signal to fall on the one or more GAP symbols.

17 . The method according to claim 3 , wherein the protection measure comprises:

adjusting a cell system bandwidth or a bandwidth part BWP in the uplink frequency band to avoid the frequency domain resource.

18 . The method according to claim 3 , wherein the protection measure comprises:

indicating that an uplink transmit power of the one or more first terminal devices on the frequency domain resource does not exceed a second threshold.

19 . The method according to claim 3 , wherein the protection measure comprises:

skipping scheduling, by the first network device, the frequency domain resource.

20 . The method according to claim 3 , wherein the protection measure comprises:

preferentially allocating the frequency domain resource to a near-point user in a cell corresponding to the uplink frequency band.