Communication Method and Communications Apparatus

A communications apparatus, comprising:

• a processor;
• and
• a memory coupled to the processor and configured to store instructions that, when executed by the processor, cause the communications apparatus to:
• receive, from a second access network device, a second notification control status of a quality of service flow, wherein the quality of service flow is has been handed over from a first access network device to the second access network device, wherein the second notification control status is a second status, and wherein the second status indicates that a quality of service requirement can be met;
• determine that a session management function network element has previously notified a policy control function network element that the quality of service requirement cannot be met;
• and
• send, to the policy control function network element in response to determining that the session management function network element has previously notified the policy control function network element that the quality of service requirement cannot be met, first information for notifying the policy control function network element that the quality of service requirement can be met.

A communication method, comprising:

• receiving, by a session management function network element from a second access network device, a second notification control status of a quality of service flow, wherein the quality of service flow has been handed over from a first access network device to the second access network device, wherein the second notification control status is a second status, and wherein the second status indicates that quality of service requirement can be met;
• determining, by the session management function network element, that the session management function network element has previously notified a policy control function network element that the quality of service requirement cannot be met;
• sending, by the session management function network element to the policy control function network element in response to determining that the session management function network element has previously notified the policy control function network element that the quality of service requirement cannot be met, first, information for notifying the policy control function network element that the quality of service requirement can be met;
• and
• receiving, by the policy control function network element, the first information for notifying the policy control function network element that the quality of service requirement can be met.

A communication system, comprising:

• a session management function network element is configured to:
• receive, from a second access network device, a second notification control status of a quality of service flow, wherein the quality of service flow is handed over from a first access network device to the second access network device, wherein the second notification control status is a second status, and wherein the second status indicates that a quality of service requirement of the quality of service flow can be met;
• determine that the session management function network element has previously notified a policy control function network element that the quality of service requirement cannot be met;
• and
• send, to the policy control function network element in response to determining that the session management function network element has previously notified the policy control function network element that the quality of service requirement cannot be met, first, information for notifying the policy control function network element that the quality of service requirement can be met;
• and
• the policy control function network element configured to receive, from the session management function network element, the first information.