Wireless communications apparatus and wireless communication method

1. A wireless communications apparatus, comprising:

an interface circuit; and

one or more processors coupled to the interface circuit and configured to:

deactivate a first wireless communication capability of a first communications module corresponding to a first user identity, so that the first communications module does not support the first wireless communication capability, wherein the first communications module is capable of supporting the first wireless communication capability and a second wireless communication capability;

activate a first wireless communication capability of a second communications module corresponding to a second user identity, so that the second communications module supports the first wireless communication capability;

send a first uplink message through the interface circuit to indicate that the first user identity does not support the first wireless communication capability; and

send a second uplink message through the interface circuit to indicate that the second user identity supports the first wireless communication capability, wherein the wireless communications apparatus is capable of performing wireless communication using the first user identity and the second user identity; and

determine, based on an instruction input received via a user interface, that a user identity corresponding to default mobile data needs to be changed from the first user identity to the second user identity.

2. The wireless communications apparatus according to claim 1 , wherein

the first wireless communication capability is associated with a first radio access technology, the second wireless communication capability is associated with a second radio access technology, and a communication capability of the first radio access technology is superior to a communication capability of the second radio access technology.

3. The wireless communications apparatus according to claim 2 , wherein

the first radio access technology is a 5G radio access technology, the second radio access technology is a 4G radio access technology, and at least one of the first uplink message and the second uplink message is a tracking area update (TAU) request message.

4. The wireless communications apparatus according to claim 2 , wherein

the first radio access technology is a 4G radio access technology, the second radio access technology is a 3G or 2G radio access technology, and at least one of the first uplink message and the second uplink message is a location area update (LAU) request message.

5. The wireless communications apparatus according to claim 1 , wherein the one or more processors are further configured to:

before sending the first uplink message, enable the wireless communications apparatus to perform a cell selection procedure or a cell reselection procedure using the first user identity, so that the wireless communications apparatus is to select a cell of a second radio access technology from a cell of a first radio access technology using the first user identity.

6. The wireless communications apparatus according to claim 1 , wherein the one or more processors are further configured to:

after sending the second uplink message, enable the wireless communications apparatus to perform a cell selection procedure, a cell reselection procedure, or a background scanning procedure using the second user identity, so that the wireless communications apparatus is to select a cell of a first radio access technology from a cell of a second radio access technology using the second user identity.

7. The wireless communications apparatus according to claim 1 , wherein

the first wireless communication capability and the second wireless communication capability are associated with a same radio access technology, and the first wireless communication capability is superior to the second wireless communication capability.

8. The wireless communications apparatus according to claim 7 , wherein

the radio access technology is a 4G or 5G radio access technology, and a quantity of multiple carriers used by the first wireless communication capability is larger than a quantity of multiple carriers used by the second wireless communication capability.

9. The wireless communications apparatus according to claim 1 , wherein the one or more processors are further configured to:

determine, based on usage of data traffic, that a user identity corresponding to default mobile data is changed from the first user identity to the second user identity.

10. A wireless communication method performed by a wireless communications apparatus, the method comprising:

deactivating a first wireless communication capability of a first communications module corresponding to a first user identity, so that the first communications module does not support the first wireless communication capability, wherein the first communications module is capable of supporting the first wireless communication capability and a second wireless communication capability;

activating a first wireless communication capability of a second communications module corresponding to a second user identity, so that the second communications module supports the first wireless communication capability;

sending a first uplink message to indicate that the first user identity does not support the first wireless communication capability; and

sending a second uplink message to indicate that the second user identity supports the first wireless communication capability, wherein the wireless communications apparatus is capable of performing wireless communication using the first user identity and the second user identity; and

before the first wireless communication capability of the first communications module is deactivated, determining, based on usage of data traffic, that a user identity corresponding to default mobile data needs to be changed from the first user identity to the second user identity.

11. The wireless communication method according to claim 10 , further comprising:

before the first uplink message is sent, performing a cell selection procedure or a cell reselection procedure using the first user identity, so that the wireless communications apparatus is to select a cell of a second radio access technology from a cell of a first radio access technology by using the first user identity.

12. The wireless communication method according to claim 10 , further comprising:

after the second uplink message is sent, performing a cell selection procedure, a cell reselection procedure, or a background scanning procedure using the second user identity, so that the wireless communications apparatus is to select a cell of a first radio access technology from a cell of a second radio access technology by using the second user identity.

13. The wireless communication method according to claim 10 , further comprising:

before the first wireless communication capability of the first communications module is deactivated, determining, based on an instruction input received via a user interface, that a user identity corresponding to default mobile data needs to be changed from the first user identity to the second user identity.

14. The wireless communication method according to claim 10 , wherein

the first wireless communication capability is associated with a first radio access technology, the second wireless communication capability is associated with a second radio access technology, and a communication capability of the first radio access technology is superior to a communication capability of the second radio access technology.

15. The wireless communication method according to claim 14 , wherein

the first radio access technology is a 5G radio access technology, the second radio access technology is a 4G radio access technology, and at least one of the first uplink message and the second uplink message is a tracking area update (TAU) request message.

16. The wireless communication method according to claim 14 , wherein

the first radio access technology is a 4G radio access technology, the second radio access technology is a 3G or 2G radio access technology, and at least one of the first uplink message and the second uplink message is a location area update (LAU) request message.

17. The wireless communication method according to claim 10 , wherein

the first wireless communication capability and the second wireless communication capability are associated with a same radio access technology, and the first wireless communication capability is superior to the second wireless communication capability.

18. A wireless communications apparatus, comprising:

at least one processor; and

at least memory coupled to the at least one processor to store instructions, which when executed by the at least one processor, cause the at least one processor to

deactivate a first wireless communication capability of a first communications module corresponding to a first user identity, so that the first communications module does not support the first wireless communication capability, wherein the first communications module is capable of supporting the first wireless communication capability and a second wireless communication capability;

activate a first wireless communication capability of a second communications module corresponding to a second user identity, so that the second communications module supports the first wireless communication capability;

send a first uplink message through an interface circuit to indicate that the first user identity does not support the first wireless communication capability; and

send a second uplink message through the interface circuit to indicate that the second user identity supports the first wireless communication capability, wherein the wireless communications apparatus is capable of performing wireless communication using the first user identity and the second user identity; and

before the first wireless communication capability of the first communications module is deactivated, determine, based on usage of data traffic, that a user identity corresponding to default mobile data needs to be changed from the first user identity to the second user identity.