CN110650495A

CN110650495A - Congestion control method, equipment and device

Info

Publication number: CN110650495A
Application number: CN201810679731.1A
Authority: CN
Inventors: 邓强
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Telecommunications Science and Technology Research Institute Co Ltd
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2020-01-03
Also published as: WO2020001102A1; TWI749312B; TW202002688A

Abstract

The invention provides a congestion control method, equipment and a device, which are used for solving the problem of overload of an access control and mobility management function network element or a session management function network element in the prior art. The method comprises the following steps: the UE sends an indication supporting the capability of a control plane data back-off timer to an access and mobility management function network element or a session management function network element; the UE receives the time length information of the control plane data back-off timer indicated by the access and mobility management function network element or the session management function network element; the control plane data backoff timer is set for the UE by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded; and the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out.

Description

Congestion control method, equipment and device

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a congestion control method, device, and apparatus.

Background

In order to support the transmission of infrequent small data (infrequent small data), a control plane (ControlPlane) transmission scheme is being researched at R16 by the third Generation Partnership Project (3 GPP), that is, data is transmitted between the UE and the network through Non-access stratum (NAS) messages, where a specific data transmission path is: a User Equipment (UE) encapsulates data in a Session Management (SM) message, and sends the SM message to an access control and mobility Management Function (AMF) network element through an NAS message, the AMF network element sends the SM message to a Session Management Function (SMF) network element through an N11 message, the SMF network element sends the SMF network element to a User Plane Function (UPF) network element, and finally the UPF network element forwards the SM message to an application end. The transmission method can transmit data without establishing a user plane, thereby effectively reducing signaling overhead and saving the power consumption of the UE. However, when a large number of UEs transmit data by this method, a large amount of NAS signaling may be generated, which may overload an access control and mobility management function network element or a session management function network element, and cause a network transmission path to be congested.

Disclosure of Invention

The invention provides a congestion control method, equipment and a device, which are used for solving the problem of overload of an access control and mobility management function network element or a session management function network element in the prior art.

In a first aspect, an embodiment of the present invention provides a congestion control method, including:

the UE sends an indication supporting the capability of a control plane data back-off timer to an access and mobility management function network element or a session management function network element;

the UE receives the time length information of the control plane data back-off timer indicated by the access and mobility management function network element or the session management function network element; the control plane data backoff timer is set for the UE by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

and the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out.

In the above scheme, the UE sends an indication supporting the capability of the control plane data backoff timer to the AMF network element or the SMF network element, if the AMF network element or the SMF network element is overloaded, the control plane data backoff timer is returned to the UE, the UE starts the control plane data backoff timer after receiving the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer expires, thereby solving the problem of overloading of the access and mobility management functional network element or the session management functional network element in the prior art.

Optionally, the sending, by the UE, an indication supporting the capability of the control plane data backoff timer to the access and mobility management function network element or the session management function network element specifically includes: the UE sends an indication supporting the capability of a control plane data back-off timer to the access and mobility management functional network element through a non-access layer mobility management message; or, the UE sends an indication supporting the capability of the control plane data backoff timer to the session management functional network element through a non-access stratum session management message.

In this embodiment, the UE may send an indication supporting the capability of the control plane data backoff timer to the access and mobility management function network element through the non-access stratum mobility management message, or may send an indication supporting the capability of the control plane data backoff timer to the session management function network element through the non-access stratum session management message, so that the flexibility of the congestion control scheme is improved.

Optionally, the receiving, by the UE, duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element specifically includes: the UE receives the time length information of the control plane data backoff timer indicated by the access and mobility management function network element through a non-access layer mobility management message; or, the UE receives, through a non-access stratum session management message, control plane data backoff timer duration information indicated by the session management function network element.

In this embodiment, the UE may receive the duration information of the control plane data backoff timer indicated by the access and mobility management function network element through the non-access stratum mobility management message, or may receive the duration information of the control plane data backoff timer indicated by the session management function network element through the non-access stratum session management message, so as to improve the flexibility of the congestion control scheme.

Optionally, after the UE sends an indication of supporting the capability of the control plane data backoff timer to the access and mobility management function network element or the session management function network element, the method further includes: and the UE receives a reason value sent by the access and mobility management function network element or the session management function network element, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

In this embodiment, the access and mobility management function network element or the session management function network element may indicate to the UE that control plane data transmitted by the UE is successfully or unsuccessfully sent, thereby ensuring reliability of control plane data transmission while solving the problem of network congestion.

Optionally, the receiving, by the UE, the cause value sent by the access and mobility management function network element or the session management function network element specifically includes: when the access and mobility management function network element or the session management function network element is overloaded, the UE receives a cause value which is sent by the access and mobility management function network element or the session management function network element and used for indicating the control plane transmission failure of the UE; or, when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that there is no subsequent uplink or downlink data transmission, the UE receives a cause value, which is sent by the access and mobility management function network element or the session management function network element and used for indicating that control plane data transmitted by the UE is successfully sent.

In this embodiment, whether to discard the control plane data transmitted by the UE is determined according to whether the UE provides the release assistance information, and the cause value for indicating the failure of data transmission is sent to the UE after discarding the control plane data transmitted by the UE, and the cause value for indicating the success of data transmission is sent to the UE after successfully sending the control plane data transmitted by the UE.

Optionally, after the UE sends an indication of supporting the capability of the control plane data backoff timer to the access and mobility management function network element or the session management function network element, the method further includes: and the UE receives a protocol data unit session identifier sent by the access and mobility management function network element or the session management function network element, wherein the protocol data unit session identifier is used for indicating a protocol data unit session in a congestion state to the UE.

In this embodiment, when the network element with the session management function is overloaded, the data unit session identifier for indicating the protocol data unit session in the congestion state to the UE is also provided to the UE, so that the UE can specify the protocol data unit session in the congestion state, and the accuracy and reliability of congestion control are improved.

Optionally, the UE does not transmit data through the control plane before the control plane data backoff timer expires, and specifically includes: and the UE does not transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer is overtime.

In this embodiment, when the network element with the session management function is overloaded, the UE does not transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer times out, so that the accuracy of congestion control is improved.

In a second aspect, an embodiment of the present invention provides a congestion control method, including: an access and mobility management function network element receives an indication that UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE; the access and mobility management function network element sends duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the access and mobility management function network element when the access and mobility management function network element or the session management function network element is overloaded.

In this embodiment, when the access and mobility management function network element or the session management function network element is overloaded, the access and mobility management function network element sends the control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer after receiving the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer expires, thereby solving the problem of overload of the access and mobility management function network element or the session management function network element in the prior art.

Optionally, the receiving, by the access and mobility management function network element, the indication that the UE supports the capability of the control plane data backoff timer, sent by the UE, specifically includes: the access and mobility management functional network element receives an indication that the UE supports the capability of a control plane data backoff timer, which is sent by the UE, through a non-access layer mobility management message; or, the network element with access and mobility management functions receives an indication that the UE supports the capability of the control plane data backoff timer, which is sent by the UE, through a non-access layer session management message.

In this embodiment, the access and mobility management functional network element may receive, through the non-access stratum mobility management message, the indication that the UE supports the control plane data backoff timer capability sent by the UE, or may receive, through the non-access stratum session management message, the indication that the UE supports the control plane data backoff timer capability sent by the UE, thereby improving the flexibility of the congestion control scheme.

Optionally, the sending, by the access and mobility management function network element, duration information of the control plane data backoff timer to the UE specifically includes: the access and mobility management functional network element sends control plane data back-off timer duration information to the UE through a non-access layer mobility management message; or, the access and mobility management functional network element sends control plane data backoff timer duration information to the UE through a non-access stratum session management message.

In this embodiment, the access and mobility management functional network element may send control plane data backoff timer duration information to the UE through the non-access stratum mobility management message, or may send control plane data backoff timer duration information to the UE through the non-access stratum session management message, thereby improving the flexibility of the congestion control scheme.

Optionally, before the network element with access and mobility management functions sends duration information of a control plane data backoff timer to the UE, the method further includes: and the access and mobility management function network element receives overload information sent by the session management function network element, wherein the overload information is used for indicating that the session management function network element is overloaded.

In this embodiment, the access and mobility management function network element may determine that the session management function network element is overloaded according to the overload information sent by the session management function network element, thereby improving the reliability of the congestion control scheme.

Optionally, after the network element with access and mobility management functions receives an indication that the UE supports the capability of the control plane data backoff timer, where the indication is sent by the UE, the method further includes: and the access and mobility management function network element sends a reason value to the UE, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

In this embodiment, the access and mobility management functional network element may indicate to the UE that control plane data transmitted by the UE is successfully or unsuccessfully transmitted, thereby solving the problem of network congestion and ensuring reliability of control plane data transmission.

Optionally, the sending, by the access and mobility management function network element, the cause value to the UE specifically includes: when the access and mobility management function network element or the session management function network element is overloaded, the access and mobility management function network element sends a cause value for indicating the failure of sending control plane data transmitted by the UE to the UE; or, when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that there is no subsequent uplink or downlink data transmission, the access and mobility management function network element sends, to the UE, a cause value for indicating that control plane data transmitted by the UE is successfully sent.

In this embodiment, the access and mobility management functional network element determines whether to discard the control plane data transmitted by the UE according to whether the UE provides the release assistance information, and sends a cause value for indicating data transmission failure to the UE after discarding the control plane data transmitted by the UE, and sends a cause value for indicating data transmission success to the UE after successfully sending the control plane data transmitted by the UE.

Optionally, before the network element with access and mobility management functions sends, to the UE, a cause value for indicating that control plane data transmitted by the UE is successfully sent, the method further includes: the access and mobility management function network element receives release auxiliary information sent by the UE; the release assistance information is used to indicate that there is no uplink or downlink data transmission in the following.

In this embodiment, the UE provides the release assistance information to the access and mobility management function network element, so that the access and mobility management function network element continues to send the control plane data received from the UE when the access and mobility management function network element or the session management function network element is overloaded, and sends a cause value for indicating that the control plane data transmitted by the UE is successfully sent to the UE, thereby solving the problem of network congestion and ensuring the reliability of control plane data transmission.

Optionally, after the network element with access and mobility management functions receives an indication that the UE supports the capability of the control plane data backoff timer, where the indication is sent by the UE, the method further includes: and the access and mobility management function network element sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating the protocol data unit session in a congestion state to the UE.

In this embodiment, when the session management function network element is overloaded, the access and mobility management function network element further provides the UE with a data unit session identifier for indicating the protocol data unit session in the congestion state to the UE, so that the UE can specify the protocol data unit session in the congestion state, and accuracy and reliability of congestion control are improved.

Optionally, before the network element with access and mobility management functions sends the session identifier of the pdu to the UE, the method further includes: and the access and mobility management function network element determines the protocol data unit session identifier associated with the session management function according to the overload information sent by the session management function network element.

Optionally, after the network element with access and mobility management functions receives, through a non-access stratum mobility management message, an indication that the UE supports the capability of the control plane data backoff timer, where the indication is sent by the UE, the method further includes: and the access and mobility management function network element indicates the UE to support the capability of the control plane data back-off timer to the session management function network element.

In this embodiment, the access and mobility management function network element may forward the indication that the UE supports the control plane data backoff timer capability, received from the UE, to the session management function network element, so that the session management function network element executes a corresponding congestion control scheme when being overloaded, thereby improving the reliability of congestion control.

In a third aspect, an embodiment of the present invention provides a congestion control method, including: a session management function network element receives an indication that UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE; the session management function network element sends duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the session management function network element when the session management function network element is overloaded.

In this embodiment, when the session management function network element is overloaded, the session management function network element sends the control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer after receiving the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out, thereby solving the problem of overload of the session management function network element in the prior art.

Optionally, the receiving, by the session management function network element, the indication that the UE supports the capability of the control plane data backoff timer, sent by the UE specifically includes: the session management function network element receives an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is contained in a non-access stratum session management message sent by the UE; or, the session management function network element receives an indication that the UE supports the capability of the control plane data backoff timer, where the indication that the UE supports the capability of the control plane data backoff timer is sent to the access and mobility management function network element by the UE through a non-access stratum mobility management message.

In this embodiment, the session management functional network element may receive, through the non-access stratum session management message, the indication that the UE supports the capability of the control plane data backoff timer, and may also receive, from the access and mobility management functional network element, the indication that the UE supports the capability of the control plane data backoff timer, thereby improving the flexibility of the congestion control scheme.

Optionally, the sending, by the session management function network element, duration information of the control plane data backoff timer to the UE specifically includes: and the session management functional network element sends control plane data backoff timer duration information to the UE through a non-access stratum session management message.

In this embodiment, the session management function network element sends the duration information of the control surface data backoff timer to the UE through the non-access stratum session management message, so that the UE can start the control surface data backoff timer after receiving the control surface data backoff timer, and does not transmit data through the control surface before the control surface data backoff timer expires, thereby solving the problem of overload of the session management function network element in the prior art.

Optionally, after the session management functional network element receives an indication that the UE supports the capability of the control plane data backoff timer, where the indication is sent by the UE, the method further includes: and the session management function network element sends a reason value to the UE, wherein the reason value is used for indicating success or failure of data sending to the UE.

In this embodiment, the session management function network element may indicate to the UE that the control plane data transmitted by the UE is successfully or unsuccessfully sent, so that the reliability of control plane data transmission is ensured while the problem of network congestion is solved.

Optionally, the sending, by the session management function network element, the cause value to the UE specifically includes: when the session management function network element is overloaded, the session management function network element sends a cause value for indicating the failure of sending control plane data transmitted by the UE to the UE; or, when the session management function network element is overloaded and the release assistance information provided by the UE indicates that there is no subsequent uplink or downlink data transmission, the session management function network element sends, to the UE, a cause value for indicating that control plane data transmitted by the UE is successfully sent.

In this embodiment, the session management function network element determines whether to discard the control plane data transmitted by the UE according to whether the UE provides the release assistance information, and sends a cause value used for indicating data transmission failure to the UE after discarding the control plane data transmitted by the UE, and sends a cause value used for indicating data transmission success to the UE after successfully sending the control plane data transmitted by the UE.

Optionally, before the session management function network element sends, to the UE, a cause value for indicating that control plane data transmitted by the UE is successfully sent, the method further includes: and the session management function network element receives release auxiliary information sent by the UE, wherein the release auxiliary information is used for indicating that no uplink or downlink data transmission exists subsequently.

In this embodiment, the UE provides the release assistance information to the session management function network element, so that the session management function network element continues to send the control plane data received from the UE when the session management function network element is overloaded, and sends a cause value for indicating that the control plane data transmitted by the UE is successfully sent to the UE.

Optionally, after the session management functional network element receives an indication that the UE supports the capability of the control plane data backoff timer, where the indication is sent by the UE, the method further includes: and the session management function network element sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating the protocol data unit session in a congestion state to the UE.

In this embodiment, when the session management function network element is overloaded, the session management function network element further provides the data unit session identifier for indicating the protocol data unit session in the congestion state to the UE, so that the UE can specify the protocol data unit session in the congestion state, and accuracy and reliability of congestion control are improved.

In a fourth aspect, an embodiment of the present invention provides a congestion control device, including: a memory for storing computer instructions; a communication interface, configured to send an indication supporting a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element; receiving duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element; the control plane data backoff timer is set for the equipment by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded; and the processor is in communication connection with the memory and the communication interface and is used for executing the computer instruction in the memory so as to start the control plane data backoff timer when the computer instruction is executed and control the communication interface not to transmit data through the control plane before the control plane data backoff timer is overtime.

Optionally, the communication interface is specifically configured to: sending an indication supporting the capability of a control plane data back-off timer to the access and mobility management function network element through a non-access layer mobility management message; or, sending an indication supporting the capability of the control plane data back-off timer to the session management function network element through a non-access stratum session management message.

Optionally, the communication interface is specifically configured to: receiving control plane data backoff timer duration information indicated by the access and mobility management function network element through a non-access layer mobility management message; or receiving the duration information of the control plane data backoff timer indicated by the session management function network element through a non-access stratum session management message.

Optionally, the communication interface is further configured to: after an indication supporting the capability of a control plane data backoff timer is sent to an access and mobility management function network element or a session management function network element, a cause value sent by the access and mobility management function network element or the session management function network element is received, where the cause value is used to indicate to the device that control plane data transmitted by the device is successfully or unsuccessfully sent.

Optionally, the communication interface is specifically configured to: when the access and mobility management function network element or the session management function network element is overloaded, receiving a cause value which is sent by the access and mobility management function network element or the session management function network element and used for indicating the control plane transmission failure of the equipment transmission; or, when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the device indicates that there is no subsequent uplink or downlink data transmission, receiving a cause value, which is sent by the access and mobility management function network element or the session management function network element and used for indicating that control plane data transmitted by the device is successfully sent.

Optionally, the communication interface is further configured to: after an indication supporting the capability of a control plane data backoff timer is sent to an access and mobility management function network element or a session management function network element, a protocol data unit session identifier sent by the access and mobility management function network element or the session management function network element is received, where the protocol data unit session identifier is used to indicate a protocol data unit session in a congestion state to the device.

Optionally, the processor is specifically configured to: and controlling the communication interface not to transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer is overtime.

In a fifth aspect, an embodiment of the present invention provides a congestion control device, including: a memory for storing computer instructions; a communication interface for communicating with a UE; a processor, communicatively coupled to the memory and the communication interface, for executing the computer instructions in the memory to control the communication interface to perform the following operations when executing the computer instructions: receiving an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE; sending duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; wherein the control plane data backoff timer is set for the UE by the device when the device or the session management function network element is overloaded.

Optionally, the communication interface is specifically configured to: receiving an indication that the UE supports the capability of a control plane data backoff timer, which is sent by the UE, through a non-access stratum mobility management message; or receiving an indication that the UE supports the capability of the control plane data backoff timer, which is sent by the UE, through a non-access stratum session management message.

Optionally, the communication interface is specifically configured to: sending control plane data back-off timer duration information to the UE through a non-access stratum mobility management message; or sending duration information of the control plane data backoff timer to the UE through a non-access stratum session management message.

Optionally, the communication interface is further configured to: and before sending duration information of a control plane data backoff timer to the UE, receiving overload information sent by the session management function network element, wherein the overload information is used for indicating that the session management function network element is overloaded.

Optionally, the communication interface is further configured to: and after receiving an indication that the UE supports the capability of a control plane data backoff timer, the UE sends a reason value to the UE, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

Optionally, the communication interface is specifically configured to: when the equipment or the session management function network element is overloaded, sending a cause value for indicating the failure of sending the control plane data transmitted by the UE to the UE; or, when the device or the session management function network element is overloaded and the release assistance information provided by the UE indicates that there is no subsequent uplink or downlink data transmission, sending a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE.

Optionally, the communication interface is further configured to: before sending a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE, receiving release auxiliary information sent by the UE; the release assistance information is used to indicate that there is no uplink or downlink data transmission in the following.

Optionally, the communication interface is further configured to: after receiving an indication that the UE supports the capability of the control plane data backoff timer, the UE sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating a protocol data unit session in a congestion state to the UE.

Optionally, the communication interface is further configured to: before sending a protocol data unit session identifier to the UE, determining the protocol data unit session identifier associated with the session management function according to overload information sent by the session management function network element.

Optionally, the communication interface is further configured to: and after receiving an indication that the UE supports the control plane data backoff timer capability, which is sent by the UE, through a non-access stratum mobility management message, indicating the UE to support the control plane data backoff timer capability to the session management function network element.

In a sixth aspect, an embodiment of the present invention provides a congestion control device, including: a memory for storing computer instructions; a communication interface for communicating with a UE; a processor, communicatively coupled to the memory and the communication interface, for executing the computer instructions in the memory to control the communication interface to perform the following operations when executing the computer instructions: receiving an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE; sending duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the communication interface when the communication interface is overloaded.

Optionally, the communication interface is specifically configured to: receiving an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is contained in a non-access stratum session management message sent by the UE; or receiving an indication that the UE supports the capability of the control plane data backoff timer, where the indication that the UE supports the capability of the control plane data backoff timer is sent to the access and mobility management function network element by the UE through a non-access stratum mobility management message.

Optionally, the communication interface is specifically configured to: and the communication interface sends the duration information of the control plane data backoff timer to the UE through a non-access stratum session management message.

Optionally, the communication interface is further configured to: and after receiving an indication that the UE supports the capability of a control plane data backoff timer, the UE sends a reason value to the UE, wherein the reason value is used for indicating success or failure of data sending to the UE.

Optionally, the communication interface is specifically configured to: when the equipment is overloaded, sending a reason value for indicating the failure of sending the control plane data transmitted by the UE to the UE; or when the device is overloaded and the release assistance information provided by the UE indicates that there is no uplink or downlink data transmission subsequently, sending a cause value to the UE, the cause value being used to indicate that the control plane data transmitted by the UE is successfully sent.

Optionally, the communication interface is further configured to: before sending a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE, receiving release auxiliary information sent by the UE, wherein the release auxiliary information is used for indicating that no uplink or downlink data is transmitted subsequently.

In a seventh aspect, an embodiment of the present invention provides a congestion control apparatus, including: a sending unit, configured to send an indication supporting a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element; a receiving unit, configured to receive duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element; the control plane data back-off timer is set for the device by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

and the processing unit is used for starting the control surface data backoff timer and not transmitting data through the control surface before the control surface data backoff timer is overtime.

In an eighth aspect, an embodiment of the present invention provides a congestion control apparatus, including: a receiving unit, configured to receive an indication that a UE supports a capability of a control plane data backoff timer, where the indication is sent by the UE; a sending unit, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out; wherein the control plane data backoff timer is set for the UE by the device when the device or the session management function network element is overloaded.

In a ninth aspect, an embodiment of the present invention provides a congestion control apparatus, including: a receiving unit, configured to receive an indication that a UE supports a capability of a control plane data backoff timer, where the indication is sent by the UE; a sending unit, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out; the control plane data backoff timer is set for the UE by the apparatus when the apparatus is overloaded.

In a tenth aspect, the present invention provides a computer-readable storage medium storing computer instructions, which, when executed on a computer, cause the computer to perform the method according to the first, second or third aspect of the present invention.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

the UE sends an indication supporting the capacity of a control plane data backoff timer to an AMF network element or an SMF network element, if the AMF network element or the SMF network element is overloaded, the control plane data backoff timer is returned to the UE, the UE starts the control plane data backoff timer after receiving the control plane data backoff timer, and data is not transmitted through the control plane before the control plane data backoff timer is overtime, so that the problem of overload of the AMF network element or the SMF network element in the prior art is solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic flow chart of a Control Plane transport method;

fig. 2 is a flowchart illustrating a congestion control method according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a congestion control method according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a congestion control method according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a congestion control method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a congestion control method according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a congestion control device in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a congestion control device in an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a congestion control device in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a congestion control device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a congestion control device according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a congestion control device according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present invention are described in detail below with reference to the drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the embodiments of the present invention are not intended to limit the technical solutions of the present invention, but may be combined with each other without conflict.

The embodiment of the invention can be applied to a 5G system; the present invention is also applicable to other wireless communication systems, such as Long Term Evolution (LTE) System, Global System for Mobile communication (GSM) System, Mobile communication System (UMTS), Code Division Multiple Access (CDMA) System, and new network equipment System.

The user terminal UE according to the embodiments of the present invention may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or another processing device connected to a wireless modem. Wireless user terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless User Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User agent (User agent), and a User Device.

It should be understood that each network element shown herein may be a physical concept, for example, a single device may be physically, or at least two network elements may be integrated on the same physical device, or a network element shown herein may also be a logical concept, for example, a software module or a network function corresponding to a service provided by each network element, and a network function may be understood as a virtualized function implemented in virtualization, and may also be understood as a network function providing a service in a service network, for example, a network function dedicated to an access control and mobility management function, or a network function dedicated to a session management function, and the embodiments of the present invention are not limited in particular.

It is to be understood that the terms first, second, and the like in the description of the embodiments of the invention are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order. "plurality" in the description of the embodiments of the present invention means two or more.

The term "and/or" in the embodiment of the present invention is only one kind of association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In order to facilitate understanding of the technical solution of the embodiment of the present invention, a Control Plane transmission process is introduced first. Referring to fig. 1, the Control Plane transfer process mainly includes the following steps:

s0: the UE is in an idle state;

s1: the UE establishes Radio Resource Control (RRC) connection, and transmits an NAS Protocol Data Unit (PDU) through an RRC message. The NAS PDU includes a Session Management (SM) data transfer message and a PDU Session identifier (PDU Session ID), where the SMdata transfer message includes data to be transferred by the UE;

s2: the RAN network element sends the NAS PDU to the AMF network element;

s3: the AMF network element performs integrity protection verification and decrypts data;

s4: the AMF network element sends the SM data transfer message and the PDU Session ID to the SMF network element;

s5: the SMF network element forwards data to be transmitted by the UE to the UPF network element;

s6: the UPF network element forwards downlink data to be sent to the UE to the SMF network element;

s7: the SMF network element packages the downlink data in an SM data transfer message and sends the SM data transfer message to the AMF network element;

s8: the AMF network element performs data encryption and integrity protection, and sends an SM data transfer message and a PDU Session ID to the UE through the NAS message;

s9: the AMF network element sends the NAS message to the RAN;

s10: the RAN network element sends the NAS message to the UE through the RRC message;

s11: no further activity is detected by the RAN network element;

s12: and the RAN network element determines that the data transmission is finished and initiates an RCC connection release process.

The embodiment of the invention provides a congestion control method, equipment and a device, which are used for solving the problem of overload of an AMF (advanced metering framework) network element or an SMF (simple message format) network element in the prior art. The method, the device and the equipment are based on the same inventive concept, and because the principles of solving the problems of the method, the device and the equipment are similar, the implementation of the method, the device and the equipment can be mutually referred, and repeated parts are not repeated.

Referring to fig. 2, a congestion control method provided in an embodiment of the present invention includes the following steps:

s101, UE sends an indication supporting the capability of a control plane data backoff timer to an AMF network element or an SMF network element;

specifically, the UE sends an indication supporting a capability of a Control Plane data back-off timer (Control Plane data back-off timer) to the AMF network element through a non-access stratum mobility management message; or, the UE sends an indication supporting the capability of the control plane data backoff timer to the SMF network element through a non-access stratum session management message.

Correspondingly, when the UE sends an indication of supporting the capability of the control plane data backoff timer to the AMF network element, the AMF network element receives the indication of supporting the capability of the control plane data backoff timer by the UE through a non-access stratum mobility management message, or receives the indication of supporting the capability of the control plane data backoff timer by the UE through a non-access stratum session management message.

Correspondingly, when the UE sends an indication of supporting the capability of the control plane data backoff timer to the SMF network element, the SMF network element receives an indication of supporting the capability of the control plane data backoff timer by the UE, which is included in a non-access stratum session management message sent by the UE, or the SMF network element receives an indication of supporting the capability of the control plane data backoff timer by the UE, which is sent to the AMF network element by the UE through a non-access stratum mobility management message.

S102: the UE receives the time length information of the control plane data backoff timer indicated by the AMF network element or the SMF network element;

and when the control plane data backoff timer is an AMF network element or an SMF network element is overloaded, the AMF network element or the SMF network element is set for the UE.

Specifically, the UE receives, through a non-access stratum mobility management message, duration information of a control plane data backoff timer indicated by the AMF network element; or receiving the duration information of the control plane data backoff timer indicated by the SMF network element through a non-access stratum session management message.

Correspondingly, when the AMF network element or the SMF network element is overloaded, the AMF network element sends control plane data backoff timer duration information to the UE through a non-access stratum mobility management message, or sends control plane data backoff timer duration information to the UE through a non-access stratum session management message. Or, when the SMF network element is overloaded, the SMF network element sends control plane data backoff timer duration information to the UE through a non-access stratum session management message.

In a specific implementation process, when the SMF network element is overloaded, the SMF network element may send overload information to the AMF network element to indicate that the SMF network element is overloaded. The overload information specifically includes a protocol data unit session identifier associated with the SMF network element, where the protocol data unit session identifier is used to indicate, to the UE, a protocol data unit session in a congestion state. Correspondingly, when returning to the control plane data backoff timer, the AMF network element or the SMF network element may also return the protocol data unit session identifier at the same time.

Further, when the AMF network element or the SMF network element sends the control plane data backoff timer to the UE, a cause value (cause) may also be sent at the same time, where the cause value is used to indicate that the control plane data transmitted by the UE is successfully or unsuccessfully sent.

Specifically, in order to accelerate Release of the NAS connection and reduce the power consumption message of the UE, when the UE transmits control plane data, Release Assistance Information (RAI) may be further provided to indicate that there is no uplink/downlink data transmission subsequently or there is only one downlink data transmission subsequently, and the SMF network element may quickly initiate an NAS connection Release process after the data transmission is completed. When the SMF network element is overloaded, if the SMF network element receives the release auxiliary information sent by the UE, the SMF network element continuously sends the control plane data transmitted by the UE to a UPF (user equipment) or a network open Function (NEF), and returns a reason value to the UE to indicate that the data is successfully sent; and if the SMF network element does not receive the release auxiliary information, discarding the control plane data transmitted by the UE and sending a reason value for indicating the failure of the control plane data transmitted by the UE to the UE. The SMF network element may send the cause value to the AMF network element first, and then the AMF network element returns the cause value to the UE. When the AMF network element is overloaded, if the AMF network element receives the release auxiliary information sent by the UE, the AMF network element continuously sends the control plane data transmitted by the UE to the SMF network element, and returns a reason value to the UE to indicate that the data is successfully sent; and if the AMF network element does not receive the release auxiliary information sent by the UE, the AMF network element discards the control plane data transmitted by the UE and sends a cause value for indicating the failure of sending the control plane data transmitted by the UE to the UE.

S103: and the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out.

In a specific implementation process, if in S102 the AMF network element or the SMF network element also returns a protocol data unit session identifier when returning to the control plane data backoff timer, the specific implementation of S103 includes: and the UE does not transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer is overtime.

In the above scheme, the UE sends an indication supporting the capability of the control plane data backoff timer to the AMF network element or the SMF network element, if the AMF network element or the SMF network element is overloaded, the UE returns the control plane data backoff timer to the UE, starts the control plane data backoff timer after receiving the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out, thereby solving the problem of overloading the AMF network element or the SMF network element in the prior art.

The congestion control method in the present invention is described below by several specific complete embodiments, and the following embodiments mainly describe possible implementation procedures of the congestion control method. It should be noted that the examples in the present invention are only for explaining the present invention, and are not to be construed as limiting the present invention. All embodiments that come within the spirit of the invention are to be understood as being within the scope of the invention, and it is obvious to a person skilled in the art how modifications can be made to the invention.

Example 1:

in this embodiment, the UE indicates, to the AMF network element, the capability of supporting the control plane data backoff timer in the registration process, and when the SMF network element is overloaded, the AMF network element indicates, to the UE, duration information of the control plane data backoff timer in the registration process. Referring to fig. 3, the specific implementation steps include:

s201: the UE indicates to the AMF network element that it supports the control plane data backoff timer capability in a Registration Request (Registration Request) message. For example, the UE may include the indication Information (indication) in a terminal 5G Core Capability (UE 5G Core Capability) Information Element (IE);

s202: the AMF network element, the SMF network element, and the like perform a Registration process (Registration process) according to a flow defined in the TS 23.502, such as acquiring subscription Data of the UE from a Unified Data Management (UDM) network element;

s203: the AMF network element receives SMF network element overload (overload) information from the SMF network element through an N11 message; determining a PDU Session ID associated with the SMF network element through the OVERLOAD information of the SMF network element, namely determining the PDU Session established by the SMF network element;

s204: the AMF network element provides Control Plane data back-off timer duration information and the corresponding PDU Session ID to the UE in Registration Accept. After receiving the time length information of the Control Plane data back-off timer, the UE does not send data through the Control Plane any more before the expiration of the Control Plane data back-off timer.

In this embodiment, the UE indicates, to the AMF network element, the capability of supporting the control plane data backoff timer in the registration process, and when the SMF network element is overloaded, the AMF network element indicates, to the UE, duration information of the control plane data backoff timer in the registration process, so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer expires, thereby solving the problem of the SMF network element overload in the prior art.

Example 2:

in this embodiment, the UE indicates, to the AMF network element, the capability of supporting the control plane data backoff timer in the registration process, and when the SMF network element is overloaded, the SMF network element indicates, to the UE, duration information of the control plane data backoff timer in the NAS message transmission process. Referring to fig. 4, the specific steps include:

S301-S303: registration procedure of UE. The UE indicates to the AMF network element that it supports Control Plane data back-off timer through Registration Request message, e.g., the UE may include the indication in UE 5GC Capability; the UE realizes the Registration process after receiving the Registration Accept message;

S304-S306: in the PDU session establishment process, the AMF network element indicates the UE to support a Control Plane data back-off timer to the SMF network element through an N11 message;

S307-S310: the process of transmitting data for the UE through NAS messages:

s307: the UE encapsulates the data in an NAS SM message and sends the NAS SM message to the AMF network element;

s308: the AMF network element sends the NAS SM message containing the data to the SMF network element through an N11 message;

s309: when the SMF network element overworload is carried out, the SMF network element discards data and returns a cause value and Control Plane data back-off timer duration information to the UE through the NAS SM message, wherein the cause value indicates that the data is not successfully sent to the UE;

s310: and the AMF network element returns the cause value and the Control Plane data back-off timer duration information to the UE. After receiving the duration information of the Control Plane data back-off timer, the UE does not send data through the Control Plane any more until the Control Plane data back-off timer expires.

Further, in order to speed up the Release of the NAS connection and reduce the power amount of the UE, the UE may include Release Assistance Information (RAI) in the NAS SM message, where the Information may indicate that the UE has no uplink/downlink data transmission subsequently or only one downlink data transmission subsequently, and the SMF network element may quickly initiate the NAS connection Release process after the data transmission is completed. If the NAS SM message of the UE in step S307 includes the RAI and the RAI indicates that there is no uplink/downlink data transmission subsequently, the SMF network element sends, to the UPF network element/NEF network element, data encapsulated in the NAS SM message by the UE in step S309, and returns a cause value and Control Plane data back-off timer duration information to the UE through the NAS SM message, where the cause value indicates that the data transmission is successful to the UE.

In this embodiment, the UE indicates, to the AMF network element, that the UE supports the capability of the control plane data backoff timer in the registration process, and when the SMF network element is overloaded, the SMF network element indicates, to the UE, duration information of the control plane data backoff timer in the NAS message transmission process, so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer expires, thereby solving the problem of the SMF network element being overloaded in the prior art.

Example 3:

this embodiment is similar to embodiment 2, except that the UE indicates to the SMF network element that it supports the control plane data backoff timer capability through the NAS SM message. Referring to fig. 5, the specific steps include:

S401-S403: procedure to establish a PDU session. The UE indicates to the SMF network element that it supports Control Plane data back-offset capability through a PDU Session Establishment Request (PDU Session update Request) message. The SM message is sent by the AMF network element to the SMF network element.

S404 to S407 are the same as steps S307 to S310 in embodiment 2, and are a procedure for the UE to transmit data through the NAS message:

s404: the UE encapsulates the data in an NAS SM message and sends the NAS SM message to the AMF network element;

s405: the AMF network element sends the NAS SM message containing the data to the SMF network element through an N11 message;

s406: when the SMF network element overworload is carried out, the SMF network element discards data and returns a cause value and Control Plane data back-off timer duration information to the UE through the NAS SM message, wherein the cause value indicates that the data is not successfully sent to the UE;

s407: and the AMF network element returns the cause value and the Control Plane data back-off timer duration information to the UE. After receiving the back-off timer duration information, the UE does not send data through the control plane any more until the back-off timer expires.

Further, in order to speed up the Release of the NAS connection and reduce the power amount of the UE, the UE may include Release Assistance Information (RAI) in the NAS SM message, where the Information may indicate that the UE has no uplink/downlink data transmission subsequently or only one downlink data transmission subsequently, and the SMF network element may quickly initiate the NAS connection Release process after the data transmission is completed. If the NAS SM message in step S404 of the UE includes the RAI and the RAI indicates that there is no uplink/downlink data transmission subsequently, the SMF network element in step S406 sends the data encapsulated in the NAS SM message by the UE to the UPF/NEF, and returns the cause value and Control Plane data back-off timer duration information to the UE through the NAS SM message, where the cause value indicates that the data transmission is successful to the UE.

In this embodiment, the UE indicates, to the SMF network element, the capability of supporting the control plane data backoff timer through the NAS SM message, and when the SMF network element is overloaded, the SMF network element indicates, to the UE, duration information of the control plane data backoff timer in a NAS message transmission process, so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out, which solves the problem of the SMF network element overload in the prior art.

Example 4:

in this embodiment, the UE may indicate, to the AMF network element, the capability of the AMF network element to support the control plane data backoff timer in the registration process, and when the AMF network element is overloaded, the AMF network element indicates, to the UE, duration information of the control plane data backoff timer in the registration process or in the NAS data transmission process. Referring to fig. 6, the specific steps include:

S501-S503: is a registration process. The UE indicates to the AMF element that it supports the Control Plane data back-off timer Capability through the Registration Request message, for example, the UE may include the indication information in the UE 5GC Capability. And if the AMF network element is overloaded, returning Control plan back-off timer duration information to the UE through a Registration Accept message. After receiving the Control Plane data back-off timer duration information, the UE does not send data through the Control Plane any more.

Steps S504-S506, for the transmission process when the AMF network element is overloaded in the process of NAS message transmission data:

s504: the UE encapsulates the data in an NAS SM message and sends the NAS SM message to the AMF network element;

s504: when the AMF network element is overloaded, the AMF network element discards the data transmitted by the UE, and returns a cause value and Control Plane data back-off timer duration information to the UE through the NAS MM message, wherein the cause value indicates that the data is not successfully sent to the UE.

Further, in order to accelerate release of the NAS connection and reduce the UE power amount message, the UE may include an RAI in the NAS MM message, where the information indicates that there is no subsequent uplink/downlink data transmission or there is only one subsequent downlink data transmission, and the SMF network element may quickly initiate an NAS connection release process after the data transmission is completed. If the NAS SM message sent by the UE in S504 includes the RAI and the RAI indicates that there is no uplink/downlink data transmission subsequently, the AMF network element in S505 sends the data encapsulated in the NAS SM message by the UE to the SMF network element, and returns a cause value and Control Plane data-off time duration information to the UE through the NAS MM message, where the cause value indicates that the data transmission is successful to the UE.

In this embodiment, the UE indicates, to the AMF network element, that the AMF network element supports the capability of the control plane data backoff timer in the registration process, and when the AMF network element is overloaded, the AMF network element returns the control plane data backoff timer to the UE in the registration process or in the NAS data transmission process, so that the UE starts the control plane data backoff timer and does not transmit data through the control plane until the control plane data backoff timer is overtime, thereby solving the problem of the AMF network element overload in the prior art.

Based on the same inventive concept, referring to fig. 7, an embodiment of the present invention further provides a congestion control device, including:

a memory 21 for storing computer instructions;

a communication interface 22, configured to send an indication of supporting a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element; receiving duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element; the control plane data backoff timer is set for the equipment by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

a processor 23, communicatively connected to the memory 21 and the communication interface 22, configured to execute the computer instructions in the memory 21, so as to start the control plane data backoff timer when the computer instructions are executed, and control the communication interface 22 not to transmit data through the control plane until the control plane data backoff timer expires.

Optionally, the communication interface 22 is specifically configured to:

sending an indication supporting the capability of a control plane data back-off timer to the access and mobility management function network element through a non-access layer mobility management message; or,

and sending an indication supporting the capability of the control plane data back-off timer to the session management function network element through a non-access stratum session management message.

Optionally, the communication interface 22 is specifically configured to:

receiving control plane data backoff timer duration information indicated by the access and mobility management function network element through a non-access layer mobility management message; or,

and receiving the duration information of the control plane data backoff timer indicated by the session management function network element through a non-access stratum session management message.

Optionally, the communication interface 22 is further configured to:

after an indication supporting the capability of a control plane data backoff timer is sent to an access and mobility management function network element or a session management function network element, a cause value sent by the access and mobility management function network element or the session management function network element is received, where the cause value is used to indicate to the device that control plane data transmitted by the device is successfully or unsuccessfully sent.

Optionally, the communication interface 22 is specifically configured to:

when the access and mobility management function network element or the session management function network element is overloaded, receiving a cause value which is sent by the access and mobility management function network element or the session management function network element and used for indicating the control plane transmission failure of the equipment transmission; or,

and when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the device indicates that no uplink or downlink data is transmitted subsequently, receiving a cause value which is sent by the access and mobility management function network element or the session management function network element and used for indicating that control plane data transmitted by the device is successfully sent.

Optionally, the communication interface 22 is further configured to:

after an indication supporting the capability of a control plane data backoff timer is sent to an access and mobility management function network element or a session management function network element, a protocol data unit session identifier sent by the access and mobility management function network element or the session management function network element is received, where the protocol data unit session identifier is used to indicate a protocol data unit session in a congestion state to the device.

Optionally, the processor 23 is specifically configured to:

and controlling the communication interface 22 not to transmit data through the control plane corresponding to the pdu session before the control plane data backoff timer expires.

Based on the same inventive concept, referring to fig. 8, an embodiment of the present invention further provides a congestion control apparatus, including:

a memory 31 for storing computer instructions;

a communication interface 32 for communicating with the UE;

a processor 33, communicatively connected to the memory 31 and the communication interface 32, for executing the computer instructions in the memory 31, so as to control the communication interface 32 to perform the following operations when executing the computer instructions:

receiving an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE;

sending duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; wherein the control plane data backoff timer is set for the UE by the device when the device or the session management function network element is overloaded.

Optionally, the communication interface 32 is specifically configured to:

receiving an indication that the UE supports the capability of a control plane data backoff timer, which is sent by the UE, through a non-access stratum mobility management message; or,

and receiving an indication that the UE supports the capability of the control plane data back-off timer, which is sent by the UE, through a non-access stratum session management message.

Optionally, the communication interface 32 is specifically configured to:

sending control plane data back-off timer duration information to the UE through a non-access stratum mobility management message; or,

and sending duration information of the control plane data backoff timer to the UE through a non-access stratum session management message.

Optionally, the communication interface 32 is further configured to:

and before sending duration information of a control plane data backoff timer to the UE, receiving overload information sent by the session management function network element, wherein the overload information is used for indicating that the session management function network element is overloaded.

Optionally, the communication interface 32 is further configured to:

and after receiving an indication that the UE supports the capability of a control plane data backoff timer, the UE sends a reason value to the UE, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

Optionally, the communication interface 32 is specifically configured to:

when the equipment or the session management function network element is overloaded, sending a cause value for indicating the failure of sending the control plane data transmitted by the UE to the UE; or,

and when the equipment or the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that no uplink or downlink data is transmitted subsequently, sending a reason value for indicating that the control plane data transmitted by the UE is successfully sent to the UE.

Optionally, the communication interface 32 is further configured to:

before sending a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE, receiving release auxiliary information sent by the UE; the release assistance information is used to indicate that there is no uplink or downlink data transmission in the following.

Optionally, the communication interface 32 is further configured to:

after receiving an indication that the UE supports the capability of the control plane data backoff timer, the UE sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating a protocol data unit session in a congestion state to the UE.

Optionally, the communication interface 32 is further configured to:

before sending a protocol data unit session identifier to the UE, determining the protocol data unit session identifier associated with the session management function according to overload information sent by the session management function network element.

Optionally, the communication interface 32 is further configured to:

and after receiving an indication that the UE supports the control plane data backoff timer capability, which is sent by the UE, through a non-access stratum mobility management message, indicating the UE to support the control plane data backoff timer capability to the session management function network element.

Based on the same inventive concept, referring to fig. 9, an embodiment of the present invention further provides a congestion control apparatus, including:

a memory 41 for storing computer instructions;

a communication interface 42 for communicating with the UE;

a processor 43, communicatively connected to the memory 41 and the communication interface 42, for executing the computer instructions in the memory 41, so as to control the communication interface 42 to perform the following operations when executing the computer instructions:

sending duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; the control plane data backoff timer is set for the UE by the communication interface 42 when the communication interface 42 is overloaded.

Optionally, the communication interface 42 is specifically configured to:

receiving an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is contained in a non-access stratum session management message sent by the UE; or,

and receiving an indication that the UE supports the capability of the control plane data backoff timer, which is sent by an access and mobility management function network element, wherein the indication that the UE supports the capability of the control plane data backoff timer is sent to the access and mobility management function network element by the UE through a non-access layer mobility management message.

Optionally, the communication interface 42 is specifically configured to:

the communication interface 42 sends control plane data back-off timer duration information to the UE via a non-access stratum session management message.

Optionally, the communication interface 42 is further configured to:

and after receiving an indication that the UE supports the capability of a control plane data backoff timer, the UE sends a reason value to the UE, wherein the reason value is used for indicating success or failure of data sending to the UE.

Optionally, the communication interface 42 is specifically configured to:

when the equipment is overloaded, sending a reason value for indicating the failure of sending the control plane data transmitted by the UE to the UE; or,

and when the equipment is overloaded and the release auxiliary information provided by the UE indicates that no uplink or downlink data is transmitted subsequently, sending a reason value for indicating the success of sending the control plane data transmitted by the UE to the UE.

Optionally, the communication interface 42 is further configured to:

before sending a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE, receiving release auxiliary information sent by the UE, wherein the release auxiliary information is used for indicating that no uplink or downlink data is transmitted subsequently.

Optionally, the communication interface 42 is further configured to:

Based on the same inventive concept, referring to fig. 10, an embodiment of the present invention further provides a congestion control device, including:

a sending unit 51, configured to send an indication of supporting the capability of the control plane data backoff timer to the access and mobility management function network element or the session management function network element;

a receiving unit 52, configured to receive duration information of a control plane data backoff timer indicated by the access and mobility management functional network element or the session management functional network element; the control plane data back-off timer is set for the device by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

a processing unit 53, configured to start the control plane data backoff timer, and not transmit data through the control plane until the control plane data backoff timer expires.

Based on the same inventive concept, referring to fig. 11, an embodiment of the present invention further provides a congestion control device, including:

a receiving unit 61, configured to receive an indication that a UE supports a capability of a control plane data backoff timer, where the indication is sent by the UE;

a sending unit 62, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane before the control plane data backoff timer times out; wherein the control plane data backoff timer is set for the UE by the device when the device or the session management function network element is overloaded.

Based on the same inventive concept, referring to fig. 12, an embodiment of the present invention further provides a congestion control device, including:

a receiving unit 71, configured to receive an indication that a UE supports a capability of a control plane data backoff timer;

a sending unit 72, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane before the control plane data backoff timer times out; the control plane data backoff timer is set for the UE by the apparatus when the apparatus is overloaded.

Based on the same inventive concept, embodiments of the present invention further provide a computer-readable storage medium, which stores computer instructions that, when executed on a computer, cause the computer to perform the method according to the first, second, or third aspect of the embodiments of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A congestion control method, comprising:

a user terminal UE sends an indication supporting the capability of a control plane data back-off timer to an access and mobility management function network element or a session management function network element;

2. The method of claim 1, wherein the UE sending an indication of support for a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element, specifically comprises:

the UE sends an indication supporting the capability of a control plane data back-off timer to the access and mobility management functional network element through a non-access layer mobility management message; or,

and the UE sends an indication supporting the capability of the control plane data back-off timer to the session management function network element through a non-access layer session management message.

3. The method of claim 1, wherein the receiving, by the UE, duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element specifically includes:

the UE receives the time length information of the control plane data backoff timer indicated by the access and mobility management function network element through a non-access layer mobility management message; or,

and the UE receives the duration information of the control plane data backoff timer indicated by the session management function network element through a non-access stratum session management message.

4. The method of any of claims 1-3, wherein after the UE sends an indication to an access and mobility management function network element or a session management function network element that control plane data back-off timer capability is supported, the method further comprises:

and the UE receives a reason value sent by the access and mobility management function network element or the session management function network element, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

5. The method as claimed in claim 4, wherein the receiving, by the UE, the cause value sent by the access and mobility management function network element or the session management function network element specifically includes:

when the access and mobility management function network element or the session management function network element is overloaded, the UE receives a cause value which is sent by the access and mobility management function network element or the session management function network element and used for indicating the control plane transmission failure of the UE; or,

and when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that no uplink or downlink data is transmitted subsequently, the UE receives a reason value which is sent by the access and mobility management function network element or the session management function network element and used for indicating that the control plane data transmitted by the UE is successfully sent.

6. The method of claim 1, wherein after the UE sends an indication to an access and mobility management function network element or a session management function network element that supports a control plane data backoff timer capability, the method further comprises:

and the UE receives a protocol data unit session identifier sent by the access and mobility management function network element or the session management function network element, wherein the protocol data unit session identifier is used for indicating a protocol data unit session in a congestion state to the UE.

7. The method of claim 6, wherein the UE does not transmit data via the control plane until the control plane data backoff timer expires, specifically comprising:

and the UE does not transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer is overtime.

8. A congestion control method, comprising:

an access and mobility management function network element receives an indication that UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE;

the access and mobility management function network element sends duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the access and mobility management function network element when the access and mobility management function network element or the session management function network element is overloaded.

9. The method of claim 8, wherein receiving, by an access and mobility management function network element, an indication that the UE supports the capability of the control plane data backoff timer, sent by the UE, specifically comprises:

the access and mobility management functional network element receives an indication that the UE supports the capability of a control plane data backoff timer, which is sent by the UE, through a non-access layer mobility management message; or,

and the access and mobility management function network element receives an indication that the UE supports the capability of the control plane data backoff timer, which is sent by the UE, through a non-access layer session management message.

10. The method of claim 8, wherein the sending, by the access and mobility management function network element, the duration information of the control plane data backoff timer to the UE specifically comprises:

the access and mobility management functional network element sends control plane data back-off timer duration information to the UE through a non-access layer mobility management message; or,

and the access and mobility management functional network element sends control plane data backoff timer duration information to the UE through a non-access layer session management message.

11. The method of claim 10, wherein before the access and mobility management function network element sends control plane data back-off timer duration information to the UE, the method further comprises:

and the access and mobility management function network element receives overload information sent by the session management function network element, wherein the overload information is used for indicating that the session management function network element is overloaded.

12. The method of any of claims 8-11, wherein after the access and mobility management function network element receives an indication that a UE supports a control plane data back-off timer capability sent by the UE, the method further comprises:

and the access and mobility management function network element sends a reason value to the UE, wherein the reason value is used for indicating the success or failure of sending the control plane data transmitted by the UE to the UE.

13. The method of claim 12, wherein the sending, by the access and mobility management function network element, the cause value to the UE specifically comprises:

when the access and mobility management function network element or the session management function network element is overloaded, the access and mobility management function network element sends a cause value for indicating the failure of sending control plane data transmitted by the UE to the UE; or,

and when the access and mobility management function network element or the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that no uplink or downlink data is transmitted subsequently, the access and mobility management function network element sends a cause value for indicating that control plane data transmitted by the UE is successfully sent to the UE.

14. The method of claim 13, wherein prior to the access and mobility management function network element sending a cause value to the UE indicating that control plane data transmission for the UE was successful, the method further comprises:

the access and mobility management function network element receives release auxiliary information sent by the UE; the release assistance information is used to indicate that there is no uplink or downlink data transmission in the following.

15. The method of any of claims 8-11, wherein after the access and mobility management function network element receives an indication that a UE supports a control plane data back-off timer capability sent by the UE, the method further comprises:

and the access and mobility management function network element sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating the protocol data unit session in a congestion state to the UE.

16. The method of claim 15, wherein prior to the access and mobility management function network element sending a protocol data unit session identification to the UE, the method further comprises:

and the access and mobility management function network element determines the protocol data unit session identifier associated with the session management function according to the overload information sent by the session management function network element.

17. The method of claim 9, wherein after the access and mobility management function network element receives an indication that the UE supports the control plane data back-off timer capability sent by the UE via a non-access stratum mobility management message, the method further comprises:

and the access and mobility management function network element indicates the UE to support the capability of the control plane data back-off timer to the session management function network element.

18. A congestion control method, comprising:

a session management function network element receives an indication that UE supports the capability of a control plane data backoff timer, wherein the indication is sent by the UE;

the session management function network element sends duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the session management function network element when the session management function network element is overloaded.

19. The method as claimed in claim 18, wherein the receiving, by the session management function network element, the indication that the UE supports the capability of the control plane data backoff timer, sent by the UE, specifically comprises:

the session management function network element receives an indication that the UE supports the capability of a control plane data backoff timer, wherein the indication is contained in a non-access stratum session management message sent by the UE; or,

and the session management function network element receives an indication that the UE supports the control plane data backoff timer capability, which is sent by an access and mobility management function network element, wherein the indication that the UE supports the control plane data backoff timer capability is sent to the access and mobility management function network element by the UE through a non-access stratum mobility management message.

20. The method of claim 18, wherein the sending, by the session management function network element, the duration information of the control plane data backoff timer to the UE specifically comprises:

and the session management functional network element sends control plane data backoff timer duration information to the UE through a non-access stratum session management message.

21. The method of any one of claims 18-20, wherein after the session management function network element receives an indication from a UE that the UE supports a control plane data back-off timer capability, the method further comprises:

and the session management function network element sends a reason value to the UE, wherein the reason value is used for indicating success or failure of data sending to the UE.

22. The method of claim 21, wherein the sending, by the session management function network element, the cause value to the UE specifically comprises:

when the session management function network element is overloaded, the session management function network element sends a cause value for indicating the failure of sending control plane data transmitted by the UE to the UE; or,

and when the session management function network element is overloaded and the release auxiliary information provided by the UE indicates that no uplink or downlink data is transmitted subsequently, the session management function network element sends a reason value for indicating that the control plane data transmitted by the UE is successfully sent to the UE.

23. The method of claim 22, wherein before the session management function network element sends a cause value to the UE indicating that control plane data transmission for the UE was successful, the method further comprises:

and the session management function network element receives release auxiliary information sent by the UE, wherein the release auxiliary information is used for indicating that no uplink or downlink data transmission exists subsequently.

24. The method of any one of claims 18-20, wherein after the session management function network element receives an indication from a UE that the UE supports a control plane data back-off timer capability, the method further comprises:

and the session management function network element sends a protocol data unit session identifier to the UE, wherein the protocol data unit session identifier is used for indicating the protocol data unit session in a congestion state to the UE.

25. A congestion control apparatus, characterized by comprising:

a memory for storing computer instructions;

a communication interface, configured to send an indication supporting a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element; receiving duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element; the control plane data backoff timer is set for the equipment by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

and the processor is in communication connection with the memory and the communication interface and is used for executing the computer instruction in the memory so as to start the control plane data backoff timer when the computer instruction is executed and control the communication interface not to transmit data through the control plane before the control plane data backoff timer is overtime.

26. The device of claim 25, wherein the communication interface is specifically configured to:

27. The device of claim 25, wherein the communication interface is specifically configured to:

28. The device of any one of claims 25-27, wherein the communication interface is further to:

29. The device of claim 28, wherein the communication interface is specifically configured to:

30. The device of claim 25, wherein the communication interface is further to:

31. The device of claim 30, wherein the processor is specifically configured to:

and controlling the communication interface not to transmit data through the control plane corresponding to the protocol data unit session before the control plane data backoff timer is overtime.

32. A congestion control apparatus, characterized by comprising:

a memory for storing computer instructions;

a communication interface for communicating with a UE;

a processor, communicatively coupled to the memory and the communication interface, for executing the computer instructions in the memory to control the communication interface to perform the following operations when executing the computer instructions:

33. The device of claim 32, wherein the communication interface is specifically configured to:

34. The device of claim 32, wherein the communication interface is specifically configured to:

35. The device of claim 34, wherein the communication interface is further to:

36. The device of any of claims 32-35, wherein the communication interface is further to:

37. The device of claim 36, wherein the communication interface is specifically configured to:

38. The device of claim 37, wherein the communication interface is further to:

39. The device of any of claims 32-35, wherein the communication interface is further to:

40. The device of claim 39, wherein the communication interface is further to:

41. The device of claim 33, wherein the communication interface is further to:

42. A congestion control apparatus, characterized by comprising:

a memory for storing computer instructions;

a communication interface for communicating with a UE;

sending duration information of a control plane data backoff timer to the UE so that the UE starts the control plane data backoff timer and does not transmit data through the control plane before the control plane data backoff timer times out; and the control plane data backoff timer is set for the UE by the communication interface when the communication interface is overloaded.

43. The device of claim 42, wherein the communication interface is specifically configured to:

44. The device of claim 42, wherein the communication interface is specifically configured to:

and the communication interface sends the duration information of the control plane data backoff timer to the UE through a non-access stratum session management message.

45. The device of any one of claims 42-44, wherein the communication interface is further to:

46. The device of claim 45, wherein the communication interface is specifically configured to:

47. The device of claim 46, wherein the communication interface is further to:

48. The device of any one of claims 42-44, wherein the communication interface is further to:

49. A congestion control apparatus, comprising:

a sending unit, configured to send an indication supporting a control plane data backoff timer capability to an access and mobility management function network element or a session management function network element;

a receiving unit, configured to receive duration information of a control plane data backoff timer indicated by the access and mobility management function network element or the session management function network element; the control plane data back-off timer is set for the device by the access and mobility management function network element or the session management function network element when the access and mobility management function network element or the session management function network element is overloaded;

50. A congestion control apparatus, comprising:

a receiving unit, configured to receive an indication that a UE supports a capability of a control plane data backoff timer, where the indication is sent by the UE;

a sending unit, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out; wherein the control plane data backoff timer is set for the UE by the device when the device or the session management function network element is overloaded.

51. A congestion control apparatus, comprising:

a sending unit, configured to send duration information of a control plane data backoff timer to the UE, so that the UE starts the control plane data backoff timer, and does not transmit data through the control plane until the control plane data backoff timer times out; the control plane data backoff timer is set for the UE by the apparatus when the apparatus is overloaded.

52. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-24.