Communication method and communications apparatus

Patent metadata

Field	Value
Publication number	US-12301668-B2
Application number	US-202318365564-A
Country	US
Kind code	B2
Filing date	Aug 4, 2023
Priority date	May 21, 2018
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

In a communication method, a first access network device sends first information to a second access network device, where the first information is used to indicate that the first access network device has notified a core network device that a quality of service requirement of at least one quality of service flow cannot be met; the second access network device may send second information to the core network device, where the second information is used to notify the core network device that a quality of service requirement of a first quality of service flow in the at least one quality of service flow can be met, and the first quality of service flow is a quality of service flow that has been handed over from the first access network device to the second access network device.

First claim

What is claimed is:

1. A method, comprising:
determining, by a session management function network element, that a quality of service flow having a quality of service requirement that cannot be met by a first access network device has been handed over from the first access network device to a second access network device; and
sending, by the session management function network element, to a policy control function network element, and after the session management function network element determines that the quality of service flow having the quality of service requirement that cannot be met by the first access network device has been handed over from the first access network device to the second access network device, a first notification that the quality of service requirement of the quality of service flow can be met.

2. The method of claim 1 , wherein before sending the first notification to the policy control function network element, the method further comprises determining, by the session management function network element, that a notification control status that is of the quality of service flow and that is latest received from the first access network device indicates that the quality of service requirement of the quality of service flow cannot be met.

3. The method of claim 2 , wherein before the quality of service flow has been handed over from the first access network device to the second access network device, the method further comprises receiving, by the session management function network element, the notification control status from the first access network device.

4. The method of claim 2 , wherein after determining that the quality of service flow has been handed over from the first access network device to the second access network device and before sending the first notification, the method further comprises updating, by the session management function network element, the notification control status of the quality of service flow to a state indicating that the quality of service requirement of the quality of service flow can be met.

5. The method of claim 1 , wherein determining that the quality of service flow has been handed over from the first access network device to the second access network device comprises receiving, by the session management function network element and from an access and mobility management function network element, information comprising an identifier of the quality of service flow that has been handed over from the first access network device to the second access network device.

6. The method of claim 1 , wherein after determining that the quality of service flow has been handed over from the first access network device to the second access network device and before sending the first notification, the method further comprises determining that the quality of service requirement of the quality of service flow can be met.

7. The method of claim 1 , further comprising receiving, by the session management function network element and from the policy control function network element, a policy decision corresponding to the first notification.

8. An apparatus, comprising:
a memory configured to store instructions; and
one or more processors coupled to the memory and configured to execute the instructions to cause the apparatus to:
determine that a quality of service flow having a quality of service requirement that cannot be met by a first access network device has been handed over from the first access network device to a second access network device; and
send, to a policy control function network element and after determining that the quality of service flow having the quality of service requirement that cannot be met by the first access network device has been handed over from the first access network device to the second access network device, a first notification that the quality of service requirement of the quality of service flow can be met.

9. The apparatus of claim 8 , wherein before sending, to the policy control function network element, the first notification, the one or more processors are further configured to execute the instructions to cause the apparatus to determine that a notification control status that is of the quality of service flow and that is latest received from the first access network device indicates that the quality of service requirement of the quality of service flow cannot be met.

10. The apparatus of claim 9 , wherein before the quality of service flow is handed over from the first access network device to the second access network device, the one or more processors are further configured to execute the instructions to cause the apparatus to receive the notification control status from the first access network device.

11. The apparatus of claim 9 , wherein after determining that the quality of service flow has been handed over from the first access network device to the second access network device and before sending the first notification, the one or more processors are further configured to execute the instructions to cause the apparatus to update the notification control status of the quality of service flow to a state indicating that the quality of service requirement of the quality service flow can be met.

12. The apparatus of claim 8 , wherein determining that the quality of service flow has been handed over from the first access network device to the second access network device comprises receiving, from an access and mobility management function network element, information comprising an identifier of the quality of service flow that has been handed over from the first access network device to the second access network device.

13. The apparatus of claim 8 , wherein after determining that the quality of service flow has been handed over from the first access network device to the second access network device and before sending the first notification, the one or more processors are further configured to execute the instructions to cause the apparatus to determine that the quality of service requirement can be met.

14. The apparatus of claim 8 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus further to receive, from the policy control function network element, a policy decision corresponding to the first notification.

15. A system, comprising:
a session management function network element configured to:
determine that a quality of service flow having a quality of service requirement that cannot be met by a first access network device has been handed over from the first access network device to a second access network device; and
send, after determining that the quality of service flow having the quality of service requirement that cannot be met by the first access network device has been handed over from the first access network device to the second access network device, a first notification that the quality of service requirement of the quality of service flow can be met; and

a policy control function network element configured to receive, from the session management function network element, the first notification indicating that the quality of service requirement of the quality of service flow can be met.

16. The system of claim 15 , wherein before sending, to the policy control function network element, the first notification, the session management function network element is further configured to determine that a notification control status that is of the quality of service flow and that is latest received from the first access network device indicates t

Assignees

• Huawei Tech Co Ltd

Inventors

• Sun Haiyang
• Xiong Chunshan

Classifications

• H04L67/141

  Setup of application sessions (admission control or resource allocation in data switching networks H04L47/70) · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04L67/562

  Brokering proxy services · CPC title

• H04W36/00837

  Determination of triggering parameters for hand-off · CPC title

• H04W36/302

  due to low signal strength · CPC title