Wireless communication method and terminal device

1. A method for wireless communication, applied to a terminal device connecting with a first network and a second network, characterized in comprising:

acquiring, by the terminal device, a current uplink-downlink ratio of the first network and an uplink duty cycle of the second network, wherein the current uplink-downlink ratio of the first network is a ratio of resources used for uplink transmission to resources used for downlink transmission in a time unit of the first network, and the uplink duty cycle of the second network is a proportion of time domain resources that can be used for uplink transmission in a time unit of the second network;

determining, by the terminal device, a maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network; and

reducing, by the terminal device in response to determining that the uplink duty cycle of the second network is greater than the maximum uplink duty cycle of the second network, a power class of a total transmit power of the first network and the second network.

2. The method according to claim 1 , wherein the uplink duty cycle of the second network is configured by a network device in the second network, or is determined autonomously by the terminal device.

3. The method according to claim 1 , further comprising:

determining, by the terminal device, the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network; and

reporting, by the terminal device, the maximum uplink duty cycle of the second network.

4. The method according to claim 3 , wherein acquiring, by the terminal device, the current uplink-downlink ratio of the first network comprises:

determining, by the terminal device according to a broadcast message of the first network, uplink configuration information of the first network, wherein the uplink configuration information of the first network comprises the current uplink-downlink ratio of the first network.

5. The method according to claim 3 , wherein the correspondence comprises a plurality of first correspondences, and each of the first correspondences corresponds to a maximum transmit power of the first network and a maximum transmit power of the second network,

the determining, by the terminal device, the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network comprises:

determining, by the terminal device, the maximum uplink duty cycle of the second network according to according to the maximum transmit power of the first network, the maximum transmit power of the second network, the current uplink-downlink ratio of the first network, and the plurality of first correspondences.

6. The method according to claim 5 , further comprising:

determining, by the terminal device, the plurality of first correspondences.

7. The method according to claim 6 , wherein the determining, by the terminal device, the plurality of first correspondences comprises:

determining, by adjusting an uplink ratio of the second network when the first network transmits signal at a maximum output power and the second network transmits signal at a maximum output power, a target uplink duty cycle of the second network when a Specific absorption rate (SAR) value reaches a preset value; and

determining the target uplink duty cycle of the second network as the maximum uplink duty cycle of the second network corresponding to a first uplink-downlink ratio, wherein the first uplink-downlink ratio is a current uplink-downlink ratio of the first network.

8. A terminal device, connecting with a first network and a second network, comprising: a processor and a memory, wherein the memory is configured to store a computer program, and the processor, when calling and running the computer program stored in the memory, is configured to:

acquire a current uplink-downlink ratio of the first network and an uplink duty cycle of the second network, wherein the current uplink-downlink ratio of the first network is a ratio of resources used for uplink transmission to resources used for downlink transmission in a time unit of the first network, and the uplink duty cycle of the second network is a proportion of time domain resources that can be used for uplink transmission in a time unit of the second network;

determining, by the terminal device, a maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network; and

reduce, in response to determining that the uplink duty cycle of the second network is greater than the maximum uplink duty cycle of the second network, a power class of a total transmit power of the first network and the second network.

9. The terminal device according to claim 8 , wherein the uplink duty cycle of the second network is configured by a network device in the second network, or is determined autonomously by the terminal device.

10. The terminal device according to claim 8 , wherein the processor is further configured to:

determine the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network; and

report the maximum uplink duty cycle of the second network.

11. The terminal device according to claim 10 , wherein the processor is further configured to:

determine, according to a broadcast message of the first network, uplink configuration information of the first network, wherein the uplink configuration information of the first network comprises the current uplink-downlink ratio of the first network.

12. The terminal device according to claim 10 , wherein the correspondence comprises a plurality of first correspondences, and each of the first correspondences corresponds to a maximum transmit power of the first network and a maximum transmit power of the second network,

the processor is further configured to:

determine the maximum uplink duty cycle of the second network according to according to the maximum transmit power of the first network, the maximum transmit power of the second network, the current uplink-downlink ratio of the first network, and the plurality of first correspondences.

13. The terminal device according to claim 12 , wherein the processor is further configured to:

determine the plurality of first correspondences.

14. The terminal device according to claim 13 , wherein the processor is further configured to:

determine, by adjusting an uplink ratio of the second network when the first network transmits signal at a maximum output power and the second network transmits signal at a maximum output power, a target uplink duty cycle of the second network when a Specific absorption rate (SAR) value reaches a preset value; and

determine the target uplink duty cycle of the second network as the maximum uplink duty cycle of the second network corresponding to a first uplink-downlink ratio, wherein the first uplink-downlink ratio is a current uplink-downlink ratio of the first network.

15. The terminal device according to claim 14 , wherein the maximum output power of the first network is 23 dBm or 26 dBm, and the maximum output power of the second network is 23 dBm or 26 dBm.

16. The terminal device according to claim 8 , wherein the first network is long term evolution (LTE) network and comprises a master node, and the second network is new radio NR network.

17. A network device, communicating with a terminal device, wherein the terminal device connects with a first network and a second network, the network device is in the first network, and the network device comprises a processor and a memory, wherein the memory is configured to store a computer program, and the processor, when calling and running the computer program stored in the memory, is configured to:

receive a maximum uplink duty cycle of the second network from the terminal device, wherein the maximum uplink duty cycle of the second network is determined by the terminal device according to a current uplink-downlink ratio of the first network, and the current uplink-downlink ratio of the first network is a ratio of resources used for uplink transmission to resources used for downlink transmission in a time unit of the first network; and

reduce, in response to determining that an uplink duty cycle of the second network is greater than the maximum uplink duty cycle of the second network, the uplink duty cycle of the second network, wherein the uplink duty cycle of the second network is a proportion of time domain resources that can be used for uplink transmission in a time unit of the second network.

18. The network device according to claim 17 , wherein the processor is further configured to:

broadcast uplink configuration information of the first network, wherein the uplink configuration information of the first network comprises the current uplink-downlink ratio of the first network.

19. The network device according to claim 17 , wherein the second maximum output power is 23 dBm or 26 dBm; the first network is a long term evolution (LTE) network, and the second network is a new radio (NR) network.

20. The network device according to claim 17 , wherein the first network is long term evolution (LTE) network and comprises a master node, and the second network is new radio NR network.