Communication method and communication apparatus

1. A communication method, comprising:

receiving, by a mobility management network element, a registration request message from a terminal;

sending, by the mobility management network element, a parameter request message to a vehicle-to-everything (V2X) parameter configuration network element based on the registration request message, wherein the parameter request message carries capability indication information used to indicate that the terminal supports V2X communication over PC5 and wherein the parameter request message is used to request a V2X configuration parameter of the terminal from the V2X parameter configuration network element, wherein the V2X parameter configuration network element is a control plane network element deployed by a network operator and is a policy and charging function element;

sending, by the V2X parameter configuration network element, the V2X configuration parameter to the mobility management network element based on the parameter request message;

receiving, by the mobility management network element, the V2X configuration parameter from the V2X parameter configuration network element; and

sending, by the mobility management network element, the V2X configuration parameter to the terminal, wherein the V2X configuration parameter can be used by the terminal to perform a V2X service.

2. The method according to claim 1 , wherein the sending, by the mobility management network element, a parameter request message to a V2X parameter configuration network element based on the registration request message comprises:

in case that the terminal is authorized to use the V2X service, sending, by the mobility management network element the parameter request message to the V2X parameter configuration network element.

3. The method according to claim 1 , wherein the method further comprises:

sending, by the mobility management network element, location information of the terminal to the V2X parameter configuration network element, wherein the location information is used by the V2X parameter configuration network element to determine the V2X configuration parameter of the terminal; and

determining, by the V2X parameter configuration network element based on a prestored correspondence between location information and a V2X configuration parameter, the V2X configuration parameter corresponding to the location information.

4. The method according to claim 1 , wherein the method further comprises:

in case that the mobility management network element determines, based on location information of the terminal, that the terminal moves out of a preset area, sending, by the mobility management network element, a notification message to the V2X parameter configuration network element, wherein the notification message is used to notify that the terminal moves out of the preset area;

sending, by the V2X parameter configuration network element, a V2X configuration parameter of the terminal to the mobility management network element, wherein the V2X configuration parameter can be used by the terminal to perform a V2X service outside the preset area.

5. The method according to claim 4 , wherein the preset area is a public land mobile network (PLMN) of the terminal.

6. The method according to claim 1 , wherein the V2X configuration parameter comprises a parameter used for V2X communication over PC5.

7. The method according to claim 1 , wherein registration request message carries the capability indication information.

8. A communication system including a memory storage and one or more processors in communication with the memory storage, the communication system comprising: a mobility management network element, and a vehicle-to-everything (V2X) parameter configuration network element, wherein

the mobility management network element is configured to receive a registration request message from a terminal, and send a parameter request message to the V2X parameter configuration network element based on the registration request message, wherein the parameter request message carries capability indication information used to indicate that the terminal supports V2X communication over PC5 and wherein the parameter request message can be used to request a V2X configuration parameter of the terminal from the V2X parameter configuration network element, wherein the V2X parameter configuration network element is a control plane network element deployed by a network operator and is a policy and charging function element;

the V2X parameter configuration network element is configured to send the V2X configuration parameter to the mobility management network element based on the parameter request message; and

the mobility management network element is further configured to receive the V2X configuration parameter from the V2X parameter configuration network element, and send the V2X configuration parameter to the terminal, wherein the V2X configuration parameter is used by the terminal to perform a V2X service.

9. The system according to claim 8 , wherein the mobility management network element is further configured to:

in case that the terminal is authorized to use the V2X service, a, send the parameter request message to the V2X parameter configuration network element.

10. The system according to claim 8 , wherein

the mobility management network element is further configured to send location information of the terminal to the V2X parameter configuration network element, wherein the location information is used by the V2X parameter configuration network element to determine the V2X configuration parameter of the terminal; and

the V2X parameter configuration network element is further configured to determine, based on a prestored correspondence between location information and a V2X configuration parameter, the V2X configuration parameter corresponding to the location information.

11. The system according to claim 8 , wherein

the mobility management network element is further configured to: determine, based on location information of the terminal, that the terminal moves out of a preset area, and send a notification message to the V2X parameter configuration network element, wherein the notification message is used to notify that the terminal moves out of the preset area; and

the V2X parameter configuration network element is further configured to send a V2X configuration parameter of the terminal to the mobility management network element, wherein the V2X configuration parameter can be used by the terminal to perform a V2X service outside the preset area.

12. The system according to claim 11 , wherein the preset area is a public land mobile network (PLMN) of the terminal.

13. The system according to claim 8 , wherein the V2X configuration parameter comprises a parameter used for V2X communication over PC5.

14. The system according to claim 8 , wherein registration request message carries the capability indication information.

15. A communication apparatus mobility management network element, comprising:

a memory storage comprising instructions; and

one or more processors in communication with the memory storage, wherein the one or more processors execute the instructions to:

receive a registration request message from a terminal;

send a parameter request message to a vehicle to everything (V2X) parameter configuration network element based on the registration request message, wherein the parameter request message carries capability indication information used to indicate that the terminal supports V2X communication over PC5 and wherein the parameter request message is used to request a V2X configuration parameter of the terminal from the V2X parameter configuration network element, wherein the V2X parameter configuration network element is a control plane network element deployed by a network operator and is a policy and charging function element;

receive the V2X configuration parameter from the V2X parameter configuration network element; and

send the V2X configuration parameter to the terminal, wherein the V2X configuration parameter is used by the terminal to perform a V2X service.

16. The apparatus according to claim 15 , wherein the one or more processors are configured to:

in case that the terminal is authorized to use the V2X service, send the parameter request message to the V2X parameter configuration network element.

17. The apparatus according to claim 15 , wherein the one or more processors are configured to:

send location information of the terminal to the V2X parameter configuration network element, wherein the location information is used by the V2X parameter configuration network element to determine the V2X configuration parameter of the terminal.

18. The apparatus according to claim 15 , wherein the one or more processors are configured to:

determine, based on location information of the terminal, that the terminal moves out of a preset area; and

send a notification message to the V2X parameter configuration network element, wherein the notification message can be used to notify that the terminal moves out of the preset area.

19. The apparatus according to claim 18 , wherein the preset area is a public land mobile network (PLMN) of the terminal.

20. The apparatus according to claim 15 , wherein registration request message carries the capability indication information.