CN112104464B

CN112104464B - Method, device and system for transmitting background traffic transmission information

Info

Publication number: CN112104464B
Application number: CN201910523242.1A
Authority: CN
Inventors: 孙海洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2021-09-07
Anticipated expiration: 2039-06-17
Also published as: CN112104464A; WO2020253385A1

Abstract

The embodiment of the application provides a method, a device and a system for transmitting background traffic transmission information, relates to the technical field of communication, and is used for transmitting the background traffic transmission information in a transmission mode supported by a terminal according to terminal capacity information and improving the reliability of the background traffic transmission information. The method comprises the following steps: a first policy control network element acquires terminal capability information of a terminal, wherein the terminal capability information is used for indicating that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal; and the first strategy control network element determines to transmit background flow transmission information in the terminal routing strategy according to the terminal capability information.

Description

Method, device and system for transmitting background traffic transmission information

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a method, a device and a system for transmitting background traffic transmission information.

Background

Background traffic Data Transfer (BDT) information means that an application in a terminal transfers Data for a user at a specific time and place at a specific rate by negotiating with a network side.

Currently, a Policy Control Function (PCF) network element may send BDT information to a terminal in the following manner. The PCF network element sends terminal routing description preference (URSP) information to the terminal. The URSP may carry a routing Selection verification condition (Route Selection validity criterion) and BDT information. However, the terminal will only apply the BDT information in the URSP if the routing check condition is met. The routing verification condition specifically includes time window information and location condition information.

However, the PCT network element does not determine whether the BDT information transmitted to the terminal via the URSP will be successfully delivered to the terminal. In addition, even if the BDT information is successfully delivered, whether the terminal can use the BDT information is unknown to the PCF network element.

Disclosure of Invention

The embodiment of the application provides a method, a device and a system for transmitting background traffic transmission information, which are used for transmitting the background traffic transmission information in a transmission mode supported by a terminal according to terminal capacity information, so that the reliability of the background traffic transmission information is improved.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: the first policy control network element acquires terminal capability information of a terminal, wherein the terminal capability information is used for indicating that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal. And the first strategy control network element determines to transmit the background flow transmission information in the terminal routing strategy according to the terminal capability information.

The embodiment of the application provides a method for transmitting background traffic transmission information, the method obtains terminal capacity information of a terminal through a first policy control network element, and determines that the terminal supports the condition of transmitting the background traffic transmission information in a terminal routing policy of the terminal according to the terminal capacity information, so that the first policy control network element can determine to adopt a transmission mode supported by the terminal and transmit the background traffic transmission information to the terminal by using the terminal routing policy. In order to improve the reliability of the transmission of the background traffic transmission information to the terminal. The method and the device avoid the problem that the background traffic transmission information cannot be successfully acquired by the terminal due to the fact that the terminal does not support the transmission of the background traffic transmission information in the terminal routing strategy and the background traffic transmission information is transmitted in the terminal routing strategy.

In one possible design, the method provided in this embodiment of the present application further includes: the first policy control network element receives a first request message from the application function network element for instructing the first policy control network element to transmit background traffic transmission information in the Policy and Charging Control (PCC) rule. And the first policy control network element sends a first response message for indicating that the transmission of the background traffic transmission information in the PCC rules is rejected to the application function network element. This may enable the application function network element to perceive that the first policy control network element does not transmit the background traffic transmission information in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element sends a first notification message for indicating the transmission of the background traffic transmission information in the terminal routing policy to the application function network element. This enables the first policy control network element application function network element to determine that the first policy control network element is transmitting the background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element receives a first indication, wherein the first indication is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing policy. The first policy control network element sends confirmation information to the application function network element, wherein the confirmation information is used for the application function network element to determine the background traffic transmission information successfully received by the terminal. The first indication facilitates the first policy control network element to determine that the terminal successfully receives the background traffic transmission information through the terminal routing policy. The background traffic transmission information successfully received by the terminal can be conveniently determined by the application function network element by sending the confirmation information. This is because the application function network element may issue a plurality of background traffic transmission information for the terminal, but the plurality of background traffic transmission information may not be received successfully by all the background traffic transmission information, and therefore, the application function network element may determine which background traffic transmission information or background traffic transmission information of the plurality of background traffic transmission information is received successfully by the terminal through the confirmation information.

For example, the acknowledgement information may be background traffic transmission information successfully received by the terminal. Or, for example, the acknowledgement information may be an identifier of background traffic transmission information successfully received by the terminal. Or, for example, the confirmation information may be an identifier of the background traffic transmission information successfully received by the terminal and at least one background traffic transmission information selected by the first policy control network element for the terminal. The background traffic transmission information successfully received by the terminal belongs to at least one background traffic transmission information selected by the first policy control network element for the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element sends the identification information of the terminal and a second instruction to the application function network element, wherein the second instruction is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing policy. The identification information of the terminal is sent, so that the application function network element can determine the terminal corresponding to the successfully received background traffic transmission information. The sending of the second indication may facilitate the application function network element to display a determination that the terminal has successfully received the background traffic transmission information via the terminal routing policy. Therefore, the subsequent application function network element can determine that the background traffic transmission information successfully received by the terminal is not transmitted by using the PCC rule any more. Or the application function network element determines to transmit other background traffic transmission information to the terminal through the PCC rule. Or the application function network element determines that the background traffic transmission information of the terminal can be transmitted in the terminal routing strategy.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element receives a first indication, wherein the first indication is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing policy. And the first policy control network element sends a third instruction to the user data management network element or the second policy control network element, wherein the third instruction is used for determining the background traffic transmission information successfully received by the terminal.

Specifically, the content of the third indication may refer to the specific content of the confirmation information, and is not repeated here.

In one possible design, the method provided in this embodiment of the present application further includes: the method for acquiring the terminal capability information of the terminal by the first policy control network element comprises the following steps: the first policy control network element obtains the terminal capability information from the second policy control network element. In this way, the second policy control network element is a policy control network element associated with the session management network element, and in a PDU session establishment process, the session management network element may obtain terminal capability information from the terminal, and then send the obtained terminal capability information to the second policy control network element. Therefore, direct interaction between the first policy control network element and the second policy control network element to obtain the terminal capability information is facilitated.

In one possible design, the method provided in this embodiment of the present application further includes: the method for acquiring the terminal capability information of the terminal by the first policy control network element comprises the following steps: the first policy control network element acquires terminal capability information from the user data management network element. On one hand, in view of the mobility of the terminal, the terminal may be replaced with the first policy control network element serving the terminal, so that the first policy control network element before moving may store the terminal capability information in the user data management network element, and the first policy control network element newly selected during moving may obtain the terminal capability information from the user data management network element. Since the selection of the first policy control network element is before the selection of the second policy control network element, and the second policy control network element and the first policy control network element share the user data management network element, the second policy control network element may also obtain the terminal capability information from the user data management network element.

When the first policy control network element before the movement is inconsistent with the first policy control network element after the movement due to the movement of the terminal, the first policy control network element before the movement can send the terminal capability information to the user data management network element, so that the first policy control network element after the movement can obtain the terminal capability information stored by the first policy control network element before the movement from the user data management network element.

In one possible design, the method provided in this embodiment of the present application further includes: the method for acquiring the terminal capability information of the terminal by the first policy control network element comprises the following steps: the first policy control network element obtains terminal capability information from the terminal. Therefore, the terminal can report the terminal capability information to the first strategy control network element in the registration process conveniently. Of course, the first policy control network element may also report the terminal capability information to the first policy control network element through a process other than the registration process.

In one possible design, the method provided in this embodiment of the present application further includes: the first strategy control network element adopts a terminal routing strategy to transmit background flow transmission information to the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: the first policy control network element receives a fourth indication from the application function network element, where the fourth indication is used to determine the background traffic transmission information. And the first policy control network element determines the background traffic transmission information according to the fourth indication. Illustratively, the fourth indication may be the background traffic transmission information itself. Of course, the fourth indication may also be an identification of the background traffic transmission information. It should be understood that the first policy control network element may obtain the background traffic transmission information indicated by the identifier of the background traffic transmission information from the user data management network element according to the identifier of the background traffic transmission information.

The fourth indication may be carried in the first request message, that is, the application function network element requests, through the first request message, the first policy control network element to transmit the background traffic indicated by the fourth indication in the policy and charging control PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element receives a second request message from the application function network element, wherein the second request message is used for requesting to transmit the background traffic transmission information in the terminal routing policy. At this time, since the terminal supports transmission of the background traffic transmission information in the terminal routing policy, the first policy control network element may send a second notification message to the application function network element, where the second notification message is used to enable the application function network element to confirm transmission of the background traffic transmission information in the terminal routing policy. Of course, the second request message may also carry a fourth indication, so that the first policy control network element determines to transmit the background traffic transmission information indicated by the fourth indication in the terminal routing policy.

In a second aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the application function network element determines to transmit the background traffic transmission information in the PCC rule. The application function network element sends a first request message to the first policy control network element, where the first request message is used to instruct the first policy control network element to transmit background traffic transmission information in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives a first response message from the first policy control network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives a first notification message from a first policy control network element. The first notification message is used for indicating that the background traffic transmission information is transmitted in the terminal routing strategy.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element receives confirmation information from the first policy control network element, wherein the confirmation information is used for the application function network element to determine the background traffic transmission information successfully received by the terminal. The specific content of the confirmation information may refer to the related description in the first aspect, and is not described herein again.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives the identification information and the second indication from the terminal of the first policy control network element. And the second indication is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing strategy.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a fourth instruction to the first policy control network element, wherein the fourth instruction is used for determining the background traffic transmission information. And the first policy control network element determines the background traffic transmission information according to the fourth indication.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a second request message to the first policy control network element, wherein the second request message is used for requesting to transmit the background traffic transmission information in the terminal routing policy. The application function network element receives a second notification message from the first policy control network element, the second notification message being used for enabling the application function network element to confirm that the background traffic transmission information can be transmitted in the terminal routing policy.

In a third aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the second strategy control network element acquires terminal capacity information of the terminal, wherein the terminal capacity information is used for indicating that the terminal supports the transmission of background flow transmission information in a terminal routing strategy of the terminal. And the second policy control network element determines that the background traffic transmission information is not transmitted in the Policy and Charging Control (PCC) rule according to the terminal capability information.

The embodiment of the application provides a method for transmitting background traffic transmission information, and the method acquires terminal capability information of a terminal through a second policy control network element. Then, the second policy control network element determines, according to the terminal capability information, that the terminal supports transmitting the background traffic transmission information in the terminal routing policy of the terminal, and then can know that a core network (for example, an AM-PCF network element) transmits the background traffic transmission information in the terminal routing policy of the terminal, thereby avoiding a conflict caused by the fact that the same background traffic transmission information is transmitted by the AM-PCF network element in the terminal routing policy and the second policy control network element in the PCC rule because it is not determined whether the terminal supports transmitting the background traffic transmission information in the terminal routing policy of the terminal and the background traffic transmission information is transmitted blindly in the PCC.

In one possible design, the obtaining, by the second policy control network element, terminal capability information of the terminal includes: and the second policy control network element acquires the terminal capability information from the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: and the second strategy control network element sends the terminal capability information to the first strategy control network element or the user data management network element. This facilitates that the first policy control network element may determine, based on the terminal capability information, that the terminal supports transmission of the background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: the second policy control network element receives the first request message from the application function network element. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the PCC rule. And the second policy control network element sends a first response message to the application function network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule.

It should be understood that if the application function network element requests the second policy control network element to transmit the background traffic transmission information using the PCC rule, but the terminal supports transmission of the background traffic transmission information in the URSP, the second policy control network element may still transmit the background traffic transmission information using the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element receives a first request message from the application function network element, wherein the first request message is used for indicating the second policy control network element to transmit the background traffic transmission information in the PCC rule. And the second policy control network element determines not to send the first PCC rule to the session management network element, wherein the first PCC rule corresponds to the background traffic transmission information successfully received by the terminal. Therefore, signaling redundancy caused by repeatedly sending the background traffic transmission information successfully received by the terminal can be avoided.

In one possible design, the method provided in this embodiment of the present application further includes: the second policy control network element receives the first request message from the application function network element. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the PCC rule. And the second policy control network element sends a second PCC rule to the session management network element, wherein the second PCC rule corresponds to the background traffic transmission information which is not transmitted in the terminal routing policy. Therefore, the terminal can be ensured to receive the background traffic transmission information in both the PCC rule and the terminal routing strategy, and the conflict between the background traffic transmission information transmitted in the PCC rule and the background traffic transmission information transmitted in the terminal routing strategy is avoided.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element acquires a third instruction from the user data management network element, wherein the third instruction is used for determining the background traffic transmission information successfully received by the terminal. And the second policy control network element is facilitated to determine the background traffic transmission information successfully received by the terminal through the third indication. The specific content of the third indication may refer to the related description in the first aspect, and is not described herein again.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element sends a first notification message to the application function network element, wherein the first notification message is used for indicating background traffic transmission information transmitted in the terminal routing policy. Therefore, the application function network element can conveniently determine to adopt the terminal routing strategy to transmit the background traffic transmission information. And on the one hand, the second policy control network element can be prevented from being triggered to transmit the background traffic transmission information by adopting the PCC rule. On the other hand, the repeated adoption of the PCC rules to transmit the background traffic transmission information transmitted by the terminal routing strategy can be avoided.

In one possible design, the method provided in this embodiment of the present application further includes: and the second strategy control network element adopts a terminal routing strategy to transmit background flow transmission information to the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: the second policy control network element determines background traffic transmission information transmitted to the terminal. For example, the second policy control network element may determine the background traffic transmission information transmitted to the terminal according to the fourth indication of the application function network element.

In a fourth aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the application function network element determines to transmit the background traffic transmission information in the PCC rule. And the application function network element sends the first request message to the second policy control network element. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives a first response message from the second policy control network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule. This facilitates the application function network element to determine that the second policy control network element may not be triggered to transmit the background traffic transmission information in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives indication information from the second policy control network element indicating that the first PCC rule is not to be sent to the session management network element. Therefore, the application function network element can determine that the PCC rule transmission is not adopted for the background traffic transmission information successfully received by the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element receives indication information from the second policy control network element for indicating that the second PCC rule is sent to the session management network element. Therefore, the application function network element can determine that the background traffic transmission information which is not transmitted in the terminal routing strategy is transmitted by adopting the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a fourth indication to the second policy control network element.

The fourth aspect may be applicable to a case where the second policy control network element determines that the terminal supports transmission of the background traffic transmission information in the terminal routing policy.

In a fifth aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: the first strategy control network element acquires terminal capacity information of the terminal, wherein the terminal capacity information is used for indicating that the terminal does not support background flow transmission information transmitted in a terminal routing strategy of the terminal. And the first strategy control network element determines not to transmit the background flow transmission information in the terminal routing strategy according to the terminal capability information.

The embodiment of the application provides a method for transmitting background traffic transmission information, and the method acquires terminal capability information of a terminal through a first policy control network element. When the terminal capability information indicates that the terminal does not support the transmission of the background traffic transmission information in the terminal routing strategy, then the first strategy control network element can determine that the background traffic transmission information is transmitted to the terminal subsequently, and avoid the transmission of the background traffic transmission information in the terminal routing strategy of the terminal. Therefore, the background flow transmission information can be prevented from being transmitted by adopting a transmission mode which is not supported by the terminal, and the reliability of transmitting the background flow transmission information is improved. This is because, under the condition that the terminal does not support the transmission of the background traffic transmission information in the terminal routing policy, if the terminal routing policy is still adopted to transmit the background traffic transmission information to the terminal, the terminal may not be able to successfully acquire the background traffic transmission information from the terminal routing policy.

In one possible design, the obtaining, by the first policy control network element, terminal capability information of the terminal includes: the first policy control network element obtains the terminal capability information from the second policy control network element. Or, the first policy control network element acquires the terminal capability information from the user data management network element; or, the first policy control network element acquires the terminal capability information from the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: the first policy control network element receives a first request message from the application function network element, wherein the first request message is used for instructing the first policy control network element to transmit background traffic transmission information in the terminal routing policy. And the first strategy control network element sends a first response message to the application function network element, wherein the first response message is used for indicating that the transmission of the background flow transmission information in the terminal routing strategy is refused. The application function network element indicates the first policy control network element to transmit the background traffic transmission information by using the terminal routing policy, but the terminal does not support the transmission of the background traffic transmission information in the terminal routing policy, so that the application function network element can timely determine that the first policy control network element does not transmit the background traffic transmission information in the terminal routing policy by sending the first response message. And further the application function network element can perform special processing according to the logic of the application function network element. For example, the application function network element triggers the first policy control network element to transmit the background traffic transmission information by using the PCC rule again.

In one possible design, the first response message may further include: a cause value indicating that the terminal does not support transmission of the background traffic transmission information in the terminal routing policy. The application function network element is convenient to determine the reason why the first policy control network element refuses to transmit the background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: and the first policy control network element sends a first notification message for indicating the transmission of the background traffic transmission information in the PCC rules to the application function network element. Therefore, the application function network element can conveniently trigger the first policy control network element to transmit the background traffic transmission information by adopting the PCC rule again.

In one possible design, the method provided in this embodiment of the present application further includes: the first policy control network element receives a first request message from an application function network element. The first request message is used for instructing the first policy control network element to transmit the background traffic transmission information in the terminal routing policy. And the first strategy control network element sends a terminal routing strategy to the terminal, wherein the terminal routing strategy does not comprise background flow transmission information.

In one possible design, the method provided in this embodiment of the present application further includes: the first policy control network element receives a fourth indication from the application function network element. And the first policy control network element determines the background traffic transmission information which needs to be transmitted to the terminal in the terminal routing policy according to the fourth indication.

In a sixth aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the application function network element determines to transmit the background traffic transmission information in the terminal routing strategy. The application function network element sends a first request message to the first policy control network element, wherein the first request message is used for indicating the first policy control network element to transmit background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives a first response message from the first policy control network element. The first response message is used for indicating that the background traffic transmission information is rejected to be transmitted in the terminal routing strategy.

In a possible implementation manner, the first response message may further include: a cause value indicating that the terminal does not support transmission of the background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a first notification message for indicating the transmission of the background traffic transmission information in the PCC rules to the first policy control network element.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a fourth indication to the first policy control network element. This facilitates the first policy control network element to determine that the background traffic transmission information indicated by the fourth indication is transmitted at the terminal routing policy if the fourth indication is carried in the first request message. And if the fourth indication is sent to the first policy control network element after the application function network element determines that the first policy control network element is to transmit the background traffic transmission information in the PCC rule. This facilitates the first policy control network element to determine to transmit the background traffic transmission information indicated by the fourth indication in the PCC rule.

It should be understood that the contents of the sixth aspect may be applied to the case where the first policy control network element determines that the terminal does not support transmission of the background traffic transmission information in the terminal routing policy of the terminal, and the first policy control network element controls interaction between the network element and the application function network element.

In a seventh aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the second strategy control network element acquires terminal capacity information of the terminal, wherein the terminal capacity information is used for indicating that the terminal does not support background flow transmission information transmitted in the terminal routing strategy of the terminal. And the second policy control network element determines to transmit the background traffic transmission information in the PCC rule according to the terminal capability information.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element receives a first request message from the application function network element, wherein the first request message is used for indicating the second policy control network element to transmit background traffic transmission information in the terminal routing policy. And the second policy control network element sends a first response message to the application function network element. The first response message is used for indicating that the background traffic transmission information is rejected to be transmitted in the terminal routing strategy.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element sends a first notification message for indicating the transmission of the background traffic transmission information in the PCC rules to the application function network element.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element receives a first request message from the application function network element, wherein the first request message is used for indicating the first policy control network element to transmit background traffic transmission information in the terminal routing policy. And the second policy control network element sends a PCC rule to the session management network element, wherein the PCC rule comprises background traffic transmission information.

In an eighth aspect, an embodiment of the present application provides a method for transmitting background traffic transmission information, including: and the application function network element determines to transmit the background traffic transmission information in the terminal routing strategy. And the application function network element sends the first request message to the second policy control network element. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the terminal routing policy.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives a first notification message from a second policy control network element. The first notification message is used to indicate that the background traffic transmission information is transmitted in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: the application function network element receives an indication from the second policy control network element indicating that the background traffic transmission information has been sent in the PCC rule.

In one possible design, the method provided in this embodiment of the present application further includes: and the application function network element sends a fourth indication to the second policy control network element. The fourth indication is used to determine background traffic transmission information transmitted in the terminal routing policy. Or the fourth indication is used to determine background traffic transmission information transmitted in the PCC rule.

In a ninth aspect, an embodiment of the present application provides an information sending method, including: the first policy control network element acquires terminal capability information. And the first strategy control network element sends the terminal capability information to the user data management network element/the second strategy control network element. The terminal capability information is used for indicating the terminal to support the background traffic transmission information transmitted in the terminal routing strategy. Or the terminal capability information is used for indicating that the terminal does not support the background traffic transmission information transmitted in the terminal routing strategy.

The specific implementation manner of the first policy control network element in the ninth aspect to acquire the terminal capability information may refer to the description of the corresponding places, which is not described herein again.

In a tenth aspect, an embodiment of the present application provides an information sending method, including: the first policy control network element determines the background traffic transmission information successfully received by the terminal. And the first policy control network element sends a third instruction to the user data management network element, wherein the third instruction is used for determining the background traffic transmission information successfully received by the terminal.

In the tenth aspect, the specific implementation manner of the first policy control network element determining that the terminal successfully receives the background traffic transmission information may refer to the description of the corresponding places, and is not described herein again. The background traffic transmission information successfully received by the terminal here may refer to the background traffic transmission information successfully received by the terminal through the terminal routing policy.

In an eleventh aspect, an embodiment of the present application provides an information obtaining method, including: and the second policy control network element acquires a third instruction from the user data management network element, wherein the third instruction is used for determining the background traffic transmission information successfully received by the terminal. And the second strategy control network element determines the background traffic transmission information successfully received by the terminal according to the third indication.

The content of the third indication is described in detail in the above description, and is not described again here.

In one possible design, the method provided in this embodiment of the present application further includes: and the second policy control network element makes a policy decision according to the third indication to generate the PCC rule.

In one possible design, in a case that the terminal supports transmission of the background traffic transmission information in the terminal routing policy, the PCC rule does not include the background traffic transmission information successfully received by the terminal.

In one possible design, the method provided in this embodiment of the present application further includes: and the second strategy control network element acquires the terminal capacity information and determines that the terminal supports transmitting the background flow transmission information in the terminal routing strategy according to the terminal capacity information.

In one possible design, the obtaining, by the second policy control network element, the terminal capability information includes: the second policy control network element is obtained from the user data management network element. Or the second policy control network element acquires the terminal capability information from the session management network element. The terminal capability information in the user data management network element may be obtained from the first policy control network element or the terminal.

In one possible design, the second policy control network element is a policy control network element that provides a service for a session of the terminal.

In one possible design, the first policy control network element is a policy control network element that transmits background traffic transmission information in a terminal routing policy.

In a twelfth aspect, embodiments of the present application provide a communication apparatus for implementing various methods in various possible designs of any one of the first to eleventh aspects. The communication device may be the first policy control network element or a device including the first policy control network element. Alternatively, the communication device may be the application function network element or a device including the application function network element. Alternatively, the communication device may be the second policy control network element, or a device including the second policy control network element. The communication device comprises corresponding modules, units or means (means) for implementing the above method, and the modules, units or means can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In a thirteenth aspect, an embodiment of the present application provides a communication apparatus, including: at least one processor and a communication interface. Wherein the processor executes the computer executable instructions stored in the communication device when the communication device is running to cause the communication device to perform the method of any of the various possible designs as described in any of the first to eleventh aspects above. For example, the communication device may be the first policy control network element, or a chip applied in the first policy control network element. For example, the communication device may be the second policy control network element, or a chip applied in the second policy control network element. For example, the communication device may be an application function network element or a chip applied in the application function network element.

It should be understood that the communication apparatus described in the above thirteenth aspect may further include: a bus and a memory for storing code and data. Optionally, the at least one processor communication interface and the memory are coupled to each other.

In a fourteenth aspect, there is provided a computer-readable storage medium having instructions stored thereon, which when run on a computer, cause the computer to perform the method of any of the various possible designs of any one of the first through eleventh aspects described above.

In a fifteenth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any one of the various possible designs of any one of the first to eleventh aspects described above.

In a sixteenth aspect, the present application provides a chip for use in a network element, the chip comprising at least one processor and a communication interface, the communication interface being coupled to the at least one processor, the processor being configured to execute a computer program or instructions to perform the method of any of the various possible designs of any one of the first to eleventh aspects, the communication interface being configured to communicate with a module other than the chip. The network element may be a first policy control network element. Or the network element may be a second policy control network element. Or the network element may be an application function network element.

Optionally, the chip described above in this application may further include at least one memory, where instructions or computer programs are stored in the at least one memory.

In a seventeenth aspect, an embodiment of the present application provides a communication system, including: an application function network element, and a first policy control network element in communication with the application function network element. The first policy control network element is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal. The first strategy control network element is also used for determining background flow transmission information transmitted in the terminal routing strategy according to the terminal capacity information; and the application function network element is used for determining that the background traffic transmission information is transmitted in the PCC rules and sending a first request message to the first policy control network element.

In one possible design, the first policy control network element is further configured to send a first response message to the application function network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule.

In one possible design, the first policy control network element is further configured to send a first notification message to the application function network element. The first notification message is used for indicating that the background traffic transmission information is transmitted in the terminal routing strategy.

In a possible design, the first policy control network element is further configured to send, to the application function network element, acknowledgement information, where the acknowledgement information is used by the application function network element to determine that the background traffic transmission information that is successfully received by the terminal.

In a possible design, the first policy control network element is further configured to send the identification information of the terminal and the second indication to the application function network element. And the second indication is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing strategy.

In one possible design, the application function network element is further configured to send a fourth indication to the first policy control network element, where the fourth indication is used to determine the background traffic transmission information.

In a possible design, the application function network element is further configured to send a second request message to the first policy control network element, where the second request message is used to request that the background traffic transmission information is transmitted in the terminal routing policy. The first policy control network element is further configured to send a second notification message to the application function network element, where the second notification message is used to enable the application function network element to confirm that the background traffic transmission information can be transmitted in the terminal routing policy.

In one possible design, the communication system may further include: a user data management network element or a second policy control network element. The first policy control network element is further configured to receive a first indication, where the first indication is used to indicate that the terminal successfully receives the background traffic transmission information through the terminal routing policy. The first policy control network element is further configured to send a third instruction to the user data management network element or the second policy control network element, where the third instruction is used to determine that the background traffic transmission information is successfully received by the terminal.

In a possible design, the first policy control network element is configured to obtain terminal capability information of a terminal, and specifically includes: and acquiring the terminal capability information from the second policy control network element.

In a possible design, the first policy control network element is configured to obtain terminal capability information of a terminal, and specifically includes: and the first policy control network element is used for acquiring the terminal capability information from the user data management network element.

In one possible design, the communication system may further include: and (4) a terminal. The first policy control network element is configured to acquire terminal capability information of a terminal, and specifically includes: and the first policy control network element is used for acquiring the terminal capability information from the terminal.

In one possible design, in the communication system, the first policy control network element is further configured to transmit the background traffic transmission information to the terminal by using a terminal routing policy.

In an eighteenth aspect, an embodiment of the present application provides a communication system, including: an application function network element, and a first policy control network element in communication with the application function network element. The application function network element is configured to determine that the background traffic transmission information is transmitted in the PCC rule. And the application function network element is also used for sending the first request message to the second strategy control network element. The first request message is used for indicating a second policy control network element to transmit background traffic transmission information in a PCC rule; and the second policy control network element is used for acquiring terminal capability information of the terminal, and the terminal capability information is used for indicating that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal. And the second policy control network element is further configured to determine that the background traffic transmission information is not transmitted in the policy and charging control PCC rule according to the terminal capability information.

In one possible design, the second policy control network element is further configured to send the first response message to the application function network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule.

In a possible design, the second policy control network element is further configured to send, to the application function network element, indication information indicating that the first PCC rule is not to be sent to the session management network element.

In a possible design, the second policy control network element is further configured to send, to the application function network element, indication information for indicating that the second PCC rule is sent to the session management network element.

In one possible design, the second policy control network element is further configured to send a fourth indication to the application function network element.

In one possible design, the communication system further includes: the first policy control network element or the user data management network element, and the second policy control network element are further configured to send terminal capability information to the first policy control network element or the user data management network element.

In one possible design, the communication system further includes: and (4) a terminal. The second policy control network element is configured to acquire terminal capability information of a terminal, and includes: the second policy control network element is specifically configured to acquire the terminal capability information from the terminal.

In a possible design, the second policy control network element is further configured to obtain a third indication from the user data management network element, where the third indication is used to determine that the terminal successfully receives the background traffic transmission information.

In a possible design, the second policy control network element is further configured to send a first notification message to the application function network element, where the first notification message is used to indicate that the background traffic transmission information is transmitted in the terminal routing policy.

In one possible design, the second policy control network element is further configured to transmit the background traffic transmission information to the terminal by using a terminal routing policy.

In a nineteenth aspect, an embodiment of the present application provides a communication system, including: an application function network element, and a first policy control network element in communication with the application function network element. The first policy control network element is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of background traffic transmission information in a terminal routing policy of the terminal. And the first policy control network element is used for determining that the background traffic transmission information is not transmitted in the terminal routing policy according to the terminal capability information. And the application function network element is used for determining the background flow transmission information transmitted in the terminal routing strategy. And the application function network element is further configured to send a first request message to the first policy control network element, where the first request message is used to instruct the first policy control network element to transmit the background traffic transmission information in the terminal routing policy.

In one possible design, the application function network element is further configured to send a first response message to the first policy control network element. The first response message is used for indicating that the background traffic transmission information is rejected to be transmitted in the terminal routing strategy.

In a possible implementation manner, the application function network element is further configured to send, to the first policy control network element, a first notification message for indicating that the background traffic transmission information is transmitted in the PCC rule.

In a possible implementation manner, the application function network element is further configured to send a fourth indication to the first policy control network element.

In one possible implementation, the communication system includes: and (4) a terminal. The second policy control network element is configured to acquire terminal capability information of a terminal, and specifically includes: the second policy control network element is specifically configured to acquire the terminal capability information from the terminal.

In one possible implementation, the communication system further includes: the first policy controls a network element or a user data management network element. And the second policy control network element is further configured to send the terminal capability information to the first policy control network element or the user data management network element.

In a possible implementation manner, the second policy control network element is further configured to determine not to send the first PCC rule to the session management network element, where the first PCC rule corresponds to the background traffic transmission information successfully received by the terminal.

In a possible implementation manner, the second policy control network element is further configured to send a second PCC rule to the session management network element, where the second PCC rule corresponds to background traffic transmission information that is not transmitted in the terminal routing policy.

In a possible implementation manner, the second policy control network element is further configured to obtain a third indication from the user data management network element.

In a possible implementation manner, the second policy control network element is further configured to send a first notification message to the application function network element, where the first notification message is used to indicate that the background traffic transmission information is transmitted in the terminal routing policy.

In a possible implementation manner, the second policy control network element is further configured to transmit the background traffic transmission information to the terminal by using the terminal routing policy.

In a possible implementation manner, the second policy control network element is further configured to determine background traffic transmission information transmitted to the terminal.

In a twentieth aspect, an embodiment of the present application provides a communication system, including: an application function network element, and a second policy control network element in communication with the application function network element. And the second policy control network element is used for acquiring terminal capability information of the terminal, and the terminal capability information is used for indicating that the terminal does not support the transmission of the background traffic transmission information in the terminal routing policy of the terminal. And the second policy control network element is further configured to determine to transmit the background traffic transmission information in the PCC rule according to the terminal capability information. And the application function network element is used for determining the background flow transmission information transmitted in the terminal routing strategy. And the application function network element is also used for sending the first request message to the second strategy control network element. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the terminal routing policy.

In a possible design, the second policy control network element is configured to obtain terminal capability information of a terminal, and specifically includes: the second policy control network element is specifically configured to acquire the terminal capability information from the terminal.

In one possible design, the second policy control network element is further configured to send the first response message to the application function network element. The first response message is used for indicating that the background traffic transmission information is rejected to be transmitted in the terminal routing strategy.

In one possible design, the second policy control network element is further configured to send, to the application function network element, a first notification message for instructing transmission of the background traffic transmission information in the PCC rule.

In a possible design, the second policy control network element is further configured to send a PCC rule to the session management network element, where the PCC rule includes background traffic transmission information.

It is understood that the computer storage medium, the communication system, and the computer program product provided above are all used for executing the corresponding methods provided above, and therefore, the beneficial effects achieved by the computer storage medium can refer to the beneficial effects in the corresponding methods provided above, and are not described herein again.

Drawings

Fig. 1 is a PDU session diagram according to an embodiment of the present application;

fig. 2a is an architecture diagram of a communication system according to an embodiment of the present application;

fig. 2b is an architecture diagram of another communication system provided in the embodiments of the present application;

fig. 3a is a first schematic diagram illustrating an application of the communication system in the non-roaming 5G network architecture according to an embodiment of the present invention;

fig. 3b is a schematic diagram illustrating an application of the communication system in the non-roaming 5G network architecture according to the embodiment of the present application;

fig. 3c is a first schematic diagram illustrating an application of the communication system in a home routing scenario in a roaming 5G network architecture according to an embodiment of the present application;

fig. 3d is a schematic diagram illustrating an application of the communication system in a home routing scenario in a roaming 5G network architecture according to an embodiment of the present application;

fig. 3e is a schematic diagram illustrating an application of the communication system in a local breakout scenario in a roaming 5G network architecture according to an embodiment of the present application;

fig. 3f is a schematic diagram illustrating an application of the communication system in the roaming 5G network architecture in the embodiment of the present application;

fig. 3g is an architecture diagram of a communication system in a local breakout scenario according to an embodiment of the present application;

fig. 3h is an architecture diagram of a communication system in a home routing scenario according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a method for transmitting BDT information according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a PDU session establishment procedure provided in an embodiment of the present application;

fig. 7 is a schematic flowchart of another method for transmitting BDT information according to an embodiment of the present disclosure;

fig. 8 is a schematic flowchart of another method for transmitting BDT information according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart of another method for transmitting BDT information according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of an apparatus for transmitting BDT information according to an embodiment of the present disclosure.

Detailed Description

In the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same or similar items having substantially the same function and action. For example, the first request message and the second request message are only for distinguishing different request messages, and the sequence order thereof is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The 5G communication system, New Radio (NR), is the next generation communication system under study. In addition, the communication system can also be applied to future-oriented communication technologies, and the technical solutions provided by the embodiments of the present application are all applied.

The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. In the embodiment of the present application, the method provided is applied to an NR system or a 5G network as an example.

Before introducing the embodiments of the present application, first, the related terms related to the embodiments of the present application are explained:

1. packet Data Unit (PDU) session: a user plane connection between the terminal and a Data Network (DN) for providing a PDU connection service. The PDU connection service supported by a 5G Core Network (CN) is a service for providing PDU exchange between a terminal and a DN determined by a Data Network Name (DNN). For example, the user plane connection may include the following network elements: a terminal, a base station, a user plane network element and a DN.

2. Terminal routing Policy (UE Route Selection Policy, URSP): which may also be referred to as user equipment routing policy, is used to associate an application to an already established PDU session or to establish a new PDU session for it, or to transfer it to a non-3 GPP access for transmission.

3. Container (Container): carrying information elements of a certain message. The information elements carried in the container are transmitted to other devices in the process of being forwarded to the target device by the source device through other devices. That is, other devices do not parse the information elements in the container, and the target device may parse the information elements in the container.

4. Background traffic Data Transfer (BDT) information: the application transmits data at a special rate by negotiating with the network side at a specific time and place.

Currently, a first Policy control network element may send a terminal Policy (Policy) to a terminal via a Non-access stratum (NAS) message, including a URSP, for selecting a PDU session. An application can be described in the URSP by an application identifier, which is described in detail in the following structure of the URSP.

Wherein, the URSP includes one or more URSP Rules (Rules), as shown in table 1:

TABLE 1 URSP architecture

TABLE 2 URSP rules

Table 3 content of RSD

It should be understood that each of the terminal routing information in table 3 has a different priority.

When the terminal detects a new application, the terminal evaluates whether the application is matched with a Traffic descriptor in the Rule according to the sequence of Rule precedence. And when the rule is matched with the Route Selection Descriptor, the terminal selects the Route Selection Descriptor in the rule according to the sequence of the Route Selection Descriptor Precedence. When a PDU session meeting the requirement (with the same attribute as the Route Selection Descriptor) exists, the terminal routes the applied data packet to the PDU session (one of the terminals can be selected according to the configuration and the like), if the PDU session not meeting the requirement does not exist, the terminal initiates the establishment of the PDU session, and establishes a session with the attribute.

In short, as shown in fig. 1, the terminal may first detect whether there is a PDU session that meets the requirement (data network name, DNN, slice, etc.) of the application (which may also be referred to as a packet), and if so, map the current application onto the PDU session.

Different patterns in fig. 1 represent different slices (single network slice selection assistance information, S-NSSAI)). The dashed line represents an un-established PDU Session (e.g., a PDU Session corresponding to packet a), and the solid line represents an established PDU Session (e.g., a PDU Session corresponding to packet B, a PDU Session corresponding to packet C.

As shown in fig. 2a, fig. 2a is a schematic structural diagram of a communication system provided in an embodiment of the present application, where the communication system includes: an application function network element 10, a first policy control network element 20 in communication with the application function network element 10. The application function network element 10 and the first policy control network element 20 may communicate directly or may communicate through forwarding of other devices, which is not specifically limited in this embodiment of the present application.

In a first example, the first policy control network element 20 is configured to obtain terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal supports transmission of the background traffic transmission information in the terminal routing policy of the terminal. The first policy control network element 20 determines to transmit the background traffic transmission information in the terminal routing policy according to the terminal capability information. And the application function network element 10 is configured to determine to transmit the background traffic transmission information in the PCC rule. The application function network element 10 is further configured to send a first request message to the first policy control network element 20, where the first request message is used to instruct the first policy control network element 20 to transmit the background traffic transmission information in the PCC rule. The specific implementation of the above scheme will be described in detail in the following method embodiments, which are not described herein again.

And determining that the terminal supports transmitting the background traffic transmission information in the terminal routing strategy of the terminal according to the terminal capability information based on the first strategy control network element. Therefore, the reliability of transmitting the background traffic transmission information in the terminal routing strategy can be improved. The method and the device avoid the situation that the terminal cannot successfully acquire the background traffic transmission information due to the fact that the terminal does not support the background traffic transmission information transmission in the terminal routing strategy of the terminal and the background traffic transmission information transmission in the terminal routing strategy.

In a second example, the first policy control network element 20 is configured to obtain terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of the background traffic transmission information in the terminal routing policy of the terminal. The first policy control network element 20 is further configured to determine, according to the terminal capability information, that the background traffic transmission information is not transmitted in the terminal routing policy. The application function network element 10 is configured to determine to transmit the background traffic transmission information in the terminal routing policy. The application function network element 10 is further configured to send a first request message to the first policy control network element, where the first request message is used to instruct the first policy control network element 20 to transmit the background traffic transmission information in the terminal routing policy. The specific implementation of the above scheme will be described in detail in the following method embodiments, which are not described herein again.

In an alternative implementation manner, the communication system shown in fig. 2a may further include: a second policy control network element in communication with the application function network element 10. The application function network element 10 and the second policy control network element 30 may communicate directly or may communicate through forwarding of other devices, which is not specifically limited in this embodiment of the present application.

In an alternative implementation manner, the communication system shown in fig. 2a may further include: a terminal or a user data management network element. The terminal accesses the core network through the access network and can communicate with the network elements in the core network. The application function network element, the first policy control network element, the user data management network element and the second policy control network element belong to network elements in a core network.

Specifically, for the interaction between the first policy control network element 20 and the second policy control network element, the user data management network element, and the terminal, reference may be made to the description of the method portion in the following embodiments, which is not described herein again.

As shown in fig. 2b, fig. 2b is a schematic structural diagram of another communication system provided in the embodiment of the present application, where the communication system includes: an application function network element 10, a second policy control network element 30 in communication with the application function network element 10. The application function network element 10 and the second policy control network element 30 may communicate directly or may communicate through forwarding of other devices, which is not specifically limited in this embodiment of the present application.

In a third example, the second policy control network element 30 is configured to obtain terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal supports transmission of the background traffic transmission information in the terminal routing policy of the terminal. The second policy control network element 30 is further configured to determine, according to the terminal capability information, that the background traffic transmission information is not transmitted in the policy and charging control PCC rule. Application function network element 10 determines to transmit the background traffic transmission information in the PCC rule. The application function network element 10 sends a first request message to the second policy control network element 30. The first request message is used for instructing the second policy control network element to transmit the background traffic transmission information in the PCC rule. The specific implementation of the above scheme will be described in detail in the following method embodiments, which are not described herein again.

The embodiment of the present application provides a communication system, where the communication system obtains terminal capability information of a terminal through a second policy control network element, and the second policy control network element determines, according to the terminal capability information, that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal, and may determine to transmit the background traffic transmission information in the terminal routing policy of the terminal, so as to avoid transmission of the background traffic transmission information in a PCC rule.

In a fourth example, the second policy control network element 30 is configured to obtain terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of the background traffic transmission information in the terminal routing policy of the terminal. The second policy control network element 30 is further configured to determine, according to the terminal capability information, to transmit the background traffic transmission information in the PCC rule. And the application function network element 10 is configured to determine to transmit the background traffic transmission information in the terminal routing policy. The application function network element 10 is configured to send a first request message to the second policy control network element 30. The first request message is used to instruct the second policy control network element 30 to transmit the background traffic transmission information in the terminal routing policy. The specific implementation of the above scheme will be described in detail in the following method embodiments, which are not described herein again.

In an alternative implementation manner, the communication system shown in fig. 2b may further include: a first policy control network element in communication with the application function network element 10. The application function network element 10 and the first policy control network element may communicate directly or may communicate through forwarding of other devices, which is not specifically limited in this embodiment of the present application.

In an alternative implementation manner, the communication system shown in fig. 2b may further include: a terminal or a user data management network element. The terminal accesses the core network through the access network and can communicate with the network elements in the core network. The application function network element, the second policy control network element, the user data management network element and the first policy control network element belong to network elements in a core network.

Specifically, for the interaction between the second policy control network element 30 and the first policy control network element, the user data management network element, and the terminal, reference may be made to the description of the method portion in the following embodiments, which is not described herein again.

Alternatively, the communication system shown in fig. 2a or fig. 2b may be applied to the current 5G network architecture and other network architectures appearing in the future, and the embodiment of the present application is not particularly limited thereto.

In the following, taking the example that the communication system shown in fig. 2a or fig. 2b is applied to a 5G network architecture, the 5G policy control architecture is a part of the 5G communication system architecture, and referring to fig. 3a to fig. 3f, according to the 5G existing standard, the session management network element and the mobility management network element may select different policy control network elements for policy control. For convenience of distinction, in the embodiment of the present application, the policy control network element connected to the mobility management network element is referred to as a first policy control network element. The policy control network element connected to the session management network element is referred to as a second policy control network element. Namely, the policy control network element selected by the mobility management network element is referred to as a first policy control network element, and the policy control network element selected by the session management network element is referred to as a second policy control network element).

Since the 5G network architecture further includes non-roaming scenarios and roaming scenarios, the following embodiments will be introduced separately:

in the 5G network architecture, in the non-roaming scenario, the 5G network architecture may be applied to the interface-based architecture shown in fig. 3a, or may be applied to the architecture based on the service interface shown in fig. 3 b. In the roaming scenario, the 5G network architecture is used for both the interface-based architecture shown in fig. 3c and 3e, and the architecture can also be applied to the service-based interface architecture shown in fig. 3d and 3 f.

For example, taking the interface-based architecture of the communication system shown in fig. 2a and 2b applied in the current non-roaming 5G network architecture as an example, as shown in fig. 3a, the Session Management element may be a Session Management Function (SMF) element in the non-roaming 5G network architecture. The network element or entity corresponding to the Policy Control network element may be a Policy Control Function (PCF) network element in the non-roaming 5G network architecture. The network element or the entity corresponding to the Mobility Management network element may be an Access and Mobility Management Function (AMF) network element in the non-roaming 5G network architecture. The network element or entity corresponding to the application function network element may be an Application Function (AF) in the non-roaming 5G network architecture. That is, the first policy control network element may be a first PCF network element, and the second policy control network element may be a second PCF network element.

In addition, as shown in fig. 3a, the non-roaming 5G network architecture may further include: AN access device (e.g., AN Access Network (AN) or a Radio Access Network (RAN)), a Unified Database (UDR), a Unified Data Management (UDM), or a Binding Support Function (BSF), a User Plane Function (UPF) Network element, a Data Network (DN), AN authentication server Function (AUSF) Network element, a Network Slice Selection Function (NSSF) Network element. A network capability exposure function (NEF) network element, a network warehouse storage function (NRF) network element, and the like, which are not specifically limited in this embodiment of the present application. The user data management network element may correspond to any one or more of UDR, UDM.

The terminal communicates with the AMF network element through a Next generation network (N1) interface (N1 for short). The access equipment communicates with the AMF network element through an N2 interface (abbreviated as N2). The access equipment communicates with the UPF network element through an N3 interface (abbreviated as N3). The UPF network elements communicate with the DN over an N6 interface (abbreviated N6). The UPF network element communicates with the SMF network element over an N4 interface (abbreviated N4). The AMF network element communicates with the SMF network element via an N11 interface (abbreviated as N11). The AMF network element communicates with the UDM network element via an N8 interface (N8 for short). The SMF network element communicates with the PCF network element via an N7 interface (abbreviated N7). The SMF network element communicates with the UDM network element over an N10 interface (abbreviated N10). The AMF network element communicates with the AUSF network element through an N12 interface (abbreviated as N12). The AMF network element communicates with the NSSF network element through an N22 interface (abbreviated as N22). The AUSF network element communicates with the UDM network element via an N13 interface (abbreviated N13). The UDM network element communicates with the UDR network element. The PCF network element is communicated with the UDR network element, and the BSF network element is communicated with the PCF network element and the SMF network element.

Fig. 3b shows a service interface-based architecture in a non-roaming 5G network architecture, which is different from fig. 3a in that the control plane network element in the 5GC in fig. 3b may also interact with the service interface. For example, the AMF network element, the AUSF network element, the SMF network element, the UDM network element, the UDR network element, the NRF network element, the NEF network element, the NSSF network element, or the PCF network element use a service interface for interaction. For example, the service interface provided by the AMF network element to the outside may be Namf. The service interface externally provided by the SMF network element may be Nsmf. The external serving interface provided by the UDM network element may be Nudm. The serving interface externally provided by the UDR network element may be nurr. The service interface externally provided by the PCF network element may be Npcf. The service interface externally provided by the BSF network element may be Nbsf. The service interface provided by the NEF network element to the outside may be Nnef. The service interface provided by the NRF network element to the outside may be nrrf. The external service interface provided by the NSSF network element may be NSSF. It should be understood that the related descriptions of the names of the various service interfaces in FIG. 3b can refer to the 5G system architecture (5G system architecture) diagram in the 23501 standard, which is not repeated herein.

It should be noted that fig. 3a and fig. 3b are only exemplary illustrations of an SMF network element and a PCF network element. Certainly, the non-roaming 5G network architecture may include multiple SMF network elements and PCF network elements, for example, the non-roaming 5G network architecture includes an SMF network element 1 and an SMF network element 2, where the SMF network element 1 communicates with the PCF network element 1, and the SMF network element 2 communicates with the PCF network element 2, which is not specifically limited in this embodiment of the present application. The connection manner between the network elements may refer to the non-roaming 5G network architecture shown in fig. 3a or fig. 3b, which is not described in detail herein.

In the architecture shown in fig. 3a or fig. 3b, each network element belongs to a Home Public Land Mobile Network (HPLMN).

Or, for example, taking the application of the communication system shown in fig. 2a or fig. 2b to the home routing scenario in the current roaming 5G network architecture as an example, as shown in fig. 3c, the network element or entity corresponding to the session management network element may be a home SMF (home SMF, H-SMF) network element in the home routing scenario. The second strategy control network element refers to an SM-PCF network element connected with the H-SMF network element. The network element or the entity corresponding to the mobility management network element may be an AMF network element in the home routing scenario. The first policy control network element may be a visited AM-PCF network element and a home AM-PCF network element. The network element or entity corresponding to the application function network element 10 may be an AF network element in the home routing scenario.

It should be noted that, in this embodiment of the present application, the name of the PCF network element connected to the SMF network element is referred to as an SM-PCF network element, and the name of the PCF network element connected to the AMF network element is referred to as an AM-PCF network element, which is an example, it is needless to say that PCF network elements connected to the SMF network element may also be referred to as other names, and PCF network elements connected to the AMF network element may also be referred to as other names, which is not limited in this embodiment of the present application. The AM-PCF and the SM-PCF may be one and the same.

In addition, as shown in fig. 3c, the home routing scenario may further include a terminal, AN access device (e.g., AN or RAN), AN AMF network element, a visited SMF (visited SMF, V-SMF) network element, a home UPF (home UPF, H-UPF) network element, a visited UPF (V-UPF) network element, a visited PCF (visited PCF, V-PCF) network element, a visited NSSF (visited NSSF, V-NSSF) network element, AN AUSF network element, a DN, AN AF network element, and a home NSSF (home NSSF, H-NSSF) network element.

The terminal, the access device, the AMF network element, the V-PCF network element, the V-SMF network element, the V-UPF network element, the V-NSSF network element and the V-PCF network element belong to a Visited Public Land Mobile Network (VPLMN). The UDM network element, the UDR network element, the H-PCF network element, the H-NSSF network element, the AF network element, the H-SMF network element, the H-UPF network element and the BSF network element belong to the HPLMN. And the H-PCF network element performs policy control related to session management.

As shown in fig. 3c, the terminal communicates with the AMF network element via N1. The access equipment communicates with the AMF network element through an N2 interface (abbreviated as N2). The access equipment communicates with the V-UPF network element over an N3 interface (N3 for short). The V-UPF network elements communicate with the H-UPF network elements over an N9 interface (abbreviated N9). The AMF network element communicates with the V-SMF network element through an N11 interface (N11 for short). The AMF network element communicates with the UDM network element via an N8 interface (N8 for short). The AMF network element communicates with the V-NSSF network element through an N22 interface (N22 for short). The V-NSSF network element communicates with the H-NSSF network element through an N31 interface (N31 for short). The AMF network element communicates with the AUSF network element through an N12 interface (abbreviated as N12). The AMF network element communicates with the V-PCF network element through an N15 interface (N15 for short). The V-PCF network element communicates with the H-PCF network element via an N24 interface (abbreviated N24). The V-SMF network element communicates with the H-SMF network element through an N16 interface (N16 for short). The H-SMF network element communicates with the H-PCF network element through an N7 interface (N7 for short). The H-SMF network elements communicate with the H-UPF network elements over an N4 interface (abbreviated N4). The V-SMF network elements communicate with the V-UPF network elements over an N4 interface (abbreviated N4). The H-SMF network element communicates with the UDM network element over an N10 interface (abbreviated N10). H-UPF network elements communicate with the DN over an N6 interface (abbreviated N6). The H-PCF network element is communicated with the UDR network element, and the BSF network element is communicated with the H-PCF network element and the H-SMF network element. The H-PCF network element communicates with the AF network element via an N5 interface (N5 for short).

Fig. 3d shows an architecture based on a service interface in a home routing scenario in a roaming 5G network architecture, which is different from fig. 3c in that a control plane network element in a 5GC in fig. 3d may also use the service interface for interaction. For example, the serving interface provided by the H-SMF network element to the outside may be Nsmf. The service interface provided by the V-SMF network element to the outside may be Nsmf. The external serving interface provided by the UDM network element may be Nudm. The serving interface externally provided by the UDR network element may be nurr. The service interface provided by the V-PCF network element to the outside may be Npcf. The service interface provided by the H-PCF network element to the outside may be Npcf. The service interface externally provided by the BSF network element may be Nbsf. The service interface names of the remaining control plane network elements may refer to the description in fig. 3b, and are not described herein again.

It should be understood that fig. 3d shows a network structure in which an H-Security Edge Protection Proxy (SEPP) is further included in the HPLMN, and the HPLMN further includes: V-SEPP. The H-SEPP and the V-SEPP communicate with each other through an N32 interface (N32 for short).

Alternatively, for example, taking the roaming scenario of the Local breakout in the current roaming 5G network architecture as an example when the communication system shown in fig. 2a or fig. 2b is applied, as shown in fig. 3e, the network element or the entity corresponding to the mobility management network element may be an AMF network element in the roaming scenario of the Local breakout. The network element or entity corresponding to the session management network element may be a V-SMF network element in the roaming scenario of the Local breakout.

In addition, the roaming scenario of Local breakout shown in fig. 3e may further include: AN access device (e.g., AN or RAN), AN AMF network element, AN SMF network element, a UPF network element, a DN, AN H-PCF network element, AN AUSF network element, AN AF network element, AN NSSF network element.

The terminal, the access equipment, the AMF network element, the V-PCF network element, the V-SMF network element, the UPF network element, the NSSF network element, the BSF, the UDR network element and the DN belong to the VPLMN. AUSF network element, UDM network element and H-PCF network element belong to the home HPLMN. And the V-PCF network element performs policy control related to session management.

For the communication interface names between the network elements in fig. 3e, reference may be made to the description in fig. 3c, which is not described herein again.

Fig. 3f shows an architecture based on a service interface in a roaming scenario of Local breakout of a roaming 5G network architecture, which is different from fig. 3e in that the control plane network element in 5GC in fig. 3f may also interact with the service interface. For specific service interface names of each network element, reference may be made to the description in fig. 3d, which is not described herein again.

It should be noted that fig. 3 c-3 f are only schematic diagrams showing a V-SMF network element, an H-UPF network element, and a V-UPF network element. Of course, the home routing scenario or roaming scenario of Local breakout may include a plurality of V-SMF network elements, a plurality of H-SMF network elements, a plurality of V-UPF network elements, and a plurality of H-UPF network elements, such as a V-SMF network element 1, an H-SMF network element 1 communicating with the V-SMF network element 1, a V-SMF network element 2 communicating with the V-SMF network element 2, and so on. The V-SMF network element 1 is communicated with the V-UPF network element 1, and the V-SMF network element 2 is communicated with the V-UPF network element 2. The H-SMF network element 1 communicates with the H-UPF network element 1, and the H-SMF network element 2 communicates with the H-UPF network element 2, which is not specifically limited in this embodiment of the present application.

It should be noted that the names of the interfaces between the network elements or the network elements in fig. 3a to fig. 3f are only an example, and the names of the network elements or the interfaces in a specific implementation may be other names, which is not specifically limited in this embodiment of the present application.

Since the 5G network architecture further includes non-roaming scenarios and roaming scenarios, the following embodiments will be described with reference to the architecture diagrams as shown in fig. 3G and fig. 3h, respectively:

for example, as an example of a roaming scenario in which the communication system shown in fig. 2a or fig. 2b is applied to a Local breakout scenario (LBO) in a current roaming scenario, in fig. 3g, the first policy control network element 20 includes: the system comprises a visited first policy control network element and a home first policy control network element. The second policy control network element 30 includes: and the second strategy of the visited place controls the network element. And the visited first policy control network element is connected with the home first policy control network element. And the first strategy control network element of the visited place is connected with the mobile management network element. And the second strategy control network element of the visited place is connected with the session management network element of the visited place.

For example, the communication system shown in fig. 2a or fig. 2b is applied to a Home Routed (HR) roaming scenario in the current roaming scenario as an example, and fig. 3h differs from fig. 3g in that: in fig. 3h, the second policy control network element 30 includes: and the home second strategy controls the network element. And the home second policy control network element is connected with the home session management network element. And the home location session management network element is connected with the visited location session management network element. And the visited place session management network element is connected with the mobile management network element.

Note 1: both LBO and HR of a roaming scenario refer to Session Management (SM) related policy control, and are independent of Mobility Management (MM) policy and terminal policy.

Note 2: the first policy control network element and the second policy control network element may be the same policy control network element.

Note 3: in a roaming scenario, as shown in fig. 3g and fig. 3h, the first policy control network element includes: the system comprises a visited first policy control network element and a home first policy control network element. And under the LBO roaming scene, the visited session management network element is connected with the visited second policy control network element and is used for carrying out SM-related policy control. And under the HR roaming scene, the home session management network element is connected with the home second policy control network element to perform SM-related policy control.

Optionally, the terminal (terminal) referred to in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem; a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (dhhand), a laptop computer (laptop computer), a cordless phone (cordless phone) or a Wireless Local Loop (WLL) station, a Machine Type Communication (MTC) terminal, a User Equipment (UE), a Mobile Station (MS), a terminal equipment (terminal device) or a relay user equipment, etc. may also be included. The relay user equipment may be, for example, a 5G home gateway (RG). For convenience of description, the above-mentioned devices are collectively referred to as a terminal in this application.

Optionally, the access device referred to in this embodiment of the present application refers to a device accessing a core network, and may be, for example, a base station, a broadband network service gateway (BNG), a convergence switch, a non-third generation partnership project (3rd generation partnership project, 3GPP) access device, and the like. The base stations may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc.

It should be understood that when the terminal can access the system shown in fig. 3a to 3f through the access network device, a network element (e.g., an NSSF network element) in a 5G core network (5G core network, 5GC) allocates one or more network slices for the terminal. Each network slice may include: one or more of a UPF network element, an SMF network element, an NRF network element, and a PCF network element.

The functions of the various network elements referred to in the above-mentioned figures 3 a-3 f are as follows:

the main functions of the UPF network element comprise: routing and transmission of data packets, packet detection, service usage reporting, QoS processing, lawful interception, uplink packet detection, downlink data packet storage and other user plane related functions.

The AMF network element has the main functions of: connection management, mobility management, registration management, access authentication and authorization, reachability management, or security context management, among other access and mobility related functions.

The SMF network element has the main functions of: session management (e.g., Session setup, modification, and release, including tunnel maintenance between the UPF and the AN), selection and control of UPF network elements, Service and Session Continuity (SSC) mode selection, or Session related functions such as roaming.

PCF network elements, the main functions include: unified policy making, providing policy control, and obtaining subscription information related to policy decision from the UDR.

The NSSF network element mainly has the functions of: selecting a set of network slice instances for the terminal, or determining allowed NSSAIs and determining a set of AMF network elements that can serve the terminal, etc.

The NRF network element mainly comprises the following functions: a service discovery Function that maintains NF text of available Network Function (NF) instances and services supported by NF instances.

The AF network element interacts with the 3GPP core network to provide services or services, including interacting with NEF, or interacting with policy framework, etc.

The NEF network element mainly comprises the following functions: the services and capabilities provided by the safe open 3GPP network function are internally open or open to third parties, etc. Converting or translating information interacted with AF and internal network function interaction German information, such as AF service identification and internal 5G core network information such as DNN, S-NSSAI and the like;

and the UDM network element supports authentication credential processing, user identity processing, access authorization, registration and mobility management, subscription management, short message management and the like in a 3GPP authentication and key negotiation mechanism.

And the AUSF network element interacts with the UDM network element to acquire the user information and executes authentication related functions, such as generating an intermediate key and the like.

UDR for storing subscription Data (Subscribed Data), Policy information (Policy Data), Application Data (Application Data), etc.

In the embodiments of the present application, the UDM, the PCF network element, and the NEF in fig. 3a to fig. 3f may use a Data storage architecture (Data storage architecture) to store the background traffic transmission information and the terminal capability information in the UDR.

It should be understood that the PCF network element in the embodiment of the present application may store the background traffic transmission information and the terminal capability information in the UDR through the N3 interface, respectively. For example, background traffic transmission information and terminal capability information may be stored in the UDR.

Fig. 4 is a schematic diagram illustrating a hardware structure of a communication device according to an embodiment of the present application. The communication device 400 may be referred to for the structure of the first policy control network element, the second policy control network element, or the application function network element in this embodiment. The communication device 400 includes a processor 401, and at least one communication interface (illustrated in fig. 4 as including the communication interface 404, for example only).

The processor 401 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure.

The communication interface 404 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc.

In one possible implementation, the communication device 400 may also include communication lines 402 and memory 403.

The communication link 402 may include a path for communicating information between the aforementioned components.

The memory 403 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be separate and coupled to the processor via a communication line 402. The memory may also be integral to the processor.

The memory 403 is used for storing computer-executable instructions for executing the present invention, and is controlled by the processor 401. The processor 401 is configured to execute computer-executable instructions stored in the memory 403, so as to implement the policy control method provided by the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 401 may include one or more CPUs such as CPU0 and CPU1 in fig. 4 as an example.

In particular implementations, communication device 400 may include multiple processors, such as processor 401 and processor 408 in fig. 4, for example, as an embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, communication device 400 may also include an output device 405 and an input device 406, as one embodiment. An output device 405 is in communication with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 406 is in communication with the processor 401 and may receive user input in a variety of ways. For example, the input device 406 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The communication device 400 described above may be a general purpose device or a special purpose device. In a specific implementation, the communication device 400 may be a desktop, a laptop, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet, a wireless terminal device, an embedded device, or a device with a similar structure as in fig. 4. The embodiment of the present application does not limit the type of the communication apparatus 400.

The method for transmitting background traffic transmission information according to the embodiment of the present application will be specifically described below with reference to fig. 2a to 3 f.

It should be noted that, in the following embodiments of the present application, names of messages between network elements or names of parameters in messages are only an example, and other names may also be used in a specific implementation, which is not specifically limited in this embodiment of the present application.

As shown in table 4, Route Selection validity criterion (routing check condition) may be newly introduced into the URSP, and the UE will apply the URSP rule only when the routing check condition is met. Specifically, time window information and location condition information are included.

TABLE 4

The manner in which the routing check condition is carried in the URSP and the manner in which the BDT information is transmitted may be referred to as an xBDT manner.

Since the routing check condition is carried, when the first policy control network element issues the BDT information to the terminal through the URSP, the terminal is not aware of whether the BDT information is successfully used by the terminal. In addition, the network side may issue the BDT information to the terminal through the URSP, or may issue the BDT information to the terminal through the PCC rule while the session is in progress, and either of the two modes may be used. While doing so would only cause confusion for control or redundancy for signaling. Based on this, the embodiment of the present application provides a method for determining that the terminal supports BDT information transmission in the URSP based on the terminal capability information. Or when the terminal does not support the BDT information transmission in the URSP based on the terminal capability information, determining not to transmit the BDT information in the URSP. This can improve the reliability of BDT information transmission and reduce redundancy of signaling.

It should be understood that, in the embodiment of the present application, for the step performed by the first policy control network element in the method for transmitting background traffic transmission information, the step performed by a chip in the first policy control network element and the step performed by the second policy control network element may also be performed by a chip in the second policy control network element and the step performed by the application function network element, and may also be performed by a chip in the application function network element. In the following embodiments, a first policy control network element, a second policy control network element, and an application function network element are taken as examples.

As shown in fig. 5, the method for transmitting background traffic transmission information provided in this embodiment of the present application is applied to the communication system shown in fig. 2a, where the first policy control network element is an AM-PCF network element, the second policy control network element is an SM-PCF network element, the application function network element is an AF network element, and the user data management network element is an UDR, and the method for transmitting background traffic transmission information provided in this embodiment of the present application includes the following steps:

step 501, the AM-PCF network element obtains the terminal capability information of the terminal. The terminal capability information is used for indicating that the terminal supports transmission of background traffic transmission information in a terminal routing strategy of the terminal.

It should be understood that, in the embodiment of the present application, the terminal supports transmission of the background traffic transmission information in the terminal routing policy, which may also be described as: the terminal supports the transmission of background traffic transmission information in an xBDT mode.

Step 502, the AM-PCF network element determines to transmit the background traffic transmission information in the terminal routing policy according to the terminal capability information.

After the AM-PCF network element determines that the terminal supports transmitting the background traffic transmission information in the terminal routing policy of the terminal, on the one hand, the AM-PCF network element may transmit the background traffic transmission information to the terminal in the terminal routing policy. On the other hand, the AM-PCF network element may transmit part of the background traffic transmission information in the terminal routing policy and transmit the other part of the background traffic transmission information in the PCC rule.

The embodiment of the application provides a method for transmitting BDT information, which is characterized in that a first policy control network element is used for acquiring terminal capability information of a terminal, and the terminal can be determined to transmit the BDT information in a terminal routing strategy under the condition that the terminal supports the BDT information transmission in the terminal routing strategy according to the terminal capability information. Therefore, the reliability of transmitting the background traffic transmission information in the terminal routing strategy can be improved. The terminal can not successfully acquire the BDT information because the terminal does not support the BDT information transmission in the terminal routing strategy and still transmits the BDT information in the terminal routing strategy.

In a first possible embodiment, with continuing reference to fig. 5, the method provided in this embodiment further includes:

step 503, the AF network element determines that BDT information needs to be transmitted in Policy and Charging Control (PCC) rules.

In the embodiment of the present application, the transmission of the BDT information in the PCC rule may also be described as: and transmitting the BDT information by adopting a BDT mode.

For example, the AF network element may determine whether to transmit the BDT information in the BDT mode or the xBDT mode according to the preconfigured mode. That is, if the preconfigured mode is the BDT mode, the AF network element determines to transmit the BDT information in the BDT mode. And if the pre-configuration mode is the xBDT mode, the AF network element determines to adopt the xBDT mode to transmit the BDT information.

For another example, the AF network element may negotiate in advance with the core network to transmit BDT information in an xBDT mode or in a BDT mode.

For example, in an aspect, an AF network element may actively request a core network for a way to transmit BDT information. Based on the request of the AF network element, the core network may instruct the AF network element to adopt the BDT mode. Or, the core network may instruct the AF network element to adopt the xBDT mode.

On the other hand, the AF network element may notify the core network of the BDT information transmission mode selected by the AF network element, and after obtaining the authorization of the core network, may determine to transmit the BDT information by using the BDT information transmission mode selected by the AF network element.

On the other hand, even if the request of the AF network element is not received, the core network can actively instruct the AF network element to adopt the BDT mode. Or the core network indicates that the AF network element adopts an xBDT mode, which is not limited in this embodiment of the present application.

For example, in a case where the core network determines that the terminal does not support BDT information transmission in the xBDT mode, the core network may instruct the AF network element to use the BDT mode. Under the condition that the core network does not determine whether the terminal supports the xBDT mode, the core network can indicate the AF network element to adopt the BDT mode or indicate the AF network element to adopt the xBDT mode to transmit background traffic transmission information.

For example, in a case where the core network determines that the terminal supports the xBDT mode, the core network may instruct the AF network element to use the xBDT mode. Or the core network may instruct the AF network element to adopt the xBDT mode. Or the core network may indicate the AF network element to adopt the BDT mode or the xBDT mode for the terminal, but it is ensured that the xBDT mode and the BDT mode do not conflict.

Step 504, the AF network element sends the first request message to the AM-PCF network element, so that the AM-PCF network element receives the first request message from the AF network element. The first request message is used for instructing the AM-PCF network element to transmit the BDT information in the PCC rule.

Illustratively, the AF network element may send the first request message to the AM-PCF network element via the NEF network element. For example, the first request message may be a BDT info command setup request (Nnef _ bdtpnotification _ Create request) service operation sent by the AF network element to the NEF network element. The NEF network element sends a BDT information strategy control establishment request (Npcf _ BDTPolicyControl _ Create request) service operation to the AM-PCF network element.

Optionally, the first request message may further carry a fourth indication. The fourth indication is used for determining BDT information needing to be transmitted by the AM-PCF network element. For example, the fourth indication may be the BDT information itself. Of course, the fourth indication may also be indication information for determining BDT information.

It should be understood that the AM-PCF network element may obtain the BDT information indicated by the AF network element from the UDR according to the indication information for determining the BDT information.

For example, the indication information for determining the BDT information may be an identification of the BDT information.

For example, the indication Information for determining the BDT Information may be identification Information of an AF Network element, Number of terminals (UEs), External Group identity (External Group Identifier), traffic per terminal (Volume per UE), required time window (Desired time window), and Network location Information (Network Area Information).

It should be understood that the AF network element sends the external group identifier to the NEF network element, and the NEF network element may process the external group identifier into the internal group identifier and send the internal group identifier to the AM-PCF network element.

As a first possible implementation, the first request message may explicitly indicate that the BDT information is transmitted in the PCC rule. Or the first request message may explicitly indicate that the BDT information determined by the fourth indication is transmitted in the PCC rule.

Illustratively, the first request message carries a first field, where the first field is used to instruct the AM-PCF network element to transmit the BDT information in the PCC rule.

As a second possible implementation, the first request message may implicitly indicate that the BDT information is transmitted in the PCC rule.

Illustratively, the first request message may itself be used to instruct the AM-PCF network element to transmit the BDT information in the PCC rule. Alternatively, the first request message may be used to instruct the AM-PCF network element to transmit the BDT information determined by the fourth indication in the PCC rule.

Whether the AF network element implicitly indicates or explicitly indicates that the BDT information is transmitted in the PCC rule, the AF network element may further request transmission of the BDT information in the terminal routing policy before the first time window, requesting transmission of the BDT information in the PCC rule within the first time window.

As a possible implementation manner, the AF network element may send the first request message to the AM-PCF network element when determining that the time for transmitting the BDT information is about to reach. As another possible implementation manner, the AF network element may determine to send the first request message to the AM-PCF network element at the request of another network element.

It should be noted that, if the fourth indication is carried in the first request message, the first request message is specifically used to request the AM-PCF network element to determine that the BDT information that needs to be determined for the fourth indication is transmitted in the PCC rule. If the fourth indication is not carried in the first request message, the first request message is specifically used for requesting that the BDT information transmitted to the terminal is transmitted in the PCC rule.

Step 505, the AM-PCF network element sends the first response message to the AF network element, so that the AM-PCF network element receives the first response message from the AF network element. The first response message is used to indicate a rejection of transmission of the background traffic transmission information in the PCC rule. Sending the first response message to the AF network element may enable the AF network element to timely sense that the core network (e.g., SM-PCF network element or PCF network element) does not transmit the background traffic transmission information in the PCC rule.

For example, the first response message may carry a second field, where the second field is used to indicate that transmission of BDT information in the PCC rule is denied. Or the first response message itself has the meaning of rejecting the transmission of BDT information in the PCC rule.

It should be noted that, on the one hand, if the AM-PCF network element determines that only the xBDT mode is used for transmitting the BDT information, the AM-PCF network element sends a first response message to the AF network element, and at this time, the first response message may be used to indicate that none of the BDT information for the terminal is transmitted in the PCC rule. On the other hand, if the AM-PCF network element determines that only the BDT information indicated by the AF network element is not transmitted in the xBDT mode, the first response message is used to indicate that transmission of the BDT information indicated by the AF network element in the PCC rule is rejected.

In a second possible embodiment, please continue to refer to fig. 5, the method provided in the embodiment of the present application further includes:

step 506, the AM-PCF network element sends the first notification message to the AF network element, so that the AF network element receives the first notification message from the AM-PCF network element. The first notification message is used to instruct transmission of BDT information in a terminal routing policy.

This facilitates the AF network element determining from the first notification message that the AM-PCF network element can transmit BDT information in the terminal routing policy, via step 506. And then the AF network element triggers the AM-PCF network element to transmit the BDT information in the terminal routing strategy.

It should be noted that, in the embodiment of the present application, step 505 and step 506 may be executed in parallel, that is, step 505 and step 506 are executed in no sequential order. Of course, the first notification message and the first response message may also carry information elements in the same message, and step 505 and step 506 are carried in different messages for example.

In a third possible embodiment, please continue to refer to fig. 5, the method provided in the embodiment of the present application further includes:

and step 507, the AM-PCF network element sends a terminal routing strategy to the terminal through the AMF network element so that the terminal receives the terminal routing strategy from the AM-PCF network element. The terminal routing strategy comprises BDT information. The terminal supports the BDT information transmission in the terminal routing strategy, so that the terminal can obtain the BDT information from the terminal routing strategy after receiving the terminal routing strategy.

Illustratively, the AM-PCF network element sends the terminal routing policy to the AMF network element, so that the AMF network element sends the terminal routing policy to the terminal.

It should be noted that the BDT information carried in the terminal routing policy in step 507 includes one or more BDT information. The one or more BDT information may be indicated by the AF network element to the AM-PCF network element. Or once the AM-PCF network element determines that the terminal supports transmitting the BDT information in the terminal routing policy, the AM-PCF network element may carry the BDT information that needs to be transmitted to the terminal in the terminal routing policy as long as the AF network element triggers the AM-PCF network element to transmit the BDT information.

Step 508, the AM-PCF network element receives the first indication. The first indication is used for indicating the terminal to successfully receive the BDT information through the terminal routing strategy.

It should be understood that, if the terminal successfully receives the BDT information through the terminal routing policy, the terminal may send the first indication to the AM-PCF network element through the AMF network element or the SMF network element. It should be understood that, after receiving the first indication from the terminal, the SMF network element may forward the first indication to the AMF network element for sending the first indication to the AM-PCF network element by the AMF network element.

Illustratively, the terminal sends a Result of terminal policy interaction (Result of the delivery of UE policies) to the AMF network element, where the Result of the delivery of UE policies carries the first indication. The AMF network element then sends an N1message to the AM-PCF network element informing (Namf _ N1MessageNotify) of the service operation. The Namf _ N1MessageNotify service operation carries a first indication.

Optionally, the first indication is further used to indicate that the terminal successfully receives BDT information through the terminal routing policy.

Illustratively, the AM-PCF network element sends the BDT information 1 and the BDT information 2 to the terminal through the terminal routing policy, and if the terminal successfully selects the BDT information 2, the first indication may also be used to indicate the identity of the BDT information 2.

Step 509, the AM-PCF network element sends a confirmation message to the AF network element, so that the AF network element receives the confirmation message from the AM-PCF network element. The confirmation information is used for determining the BDT information successfully received by the terminal by the AF network element.

This facilitates the AF network element to determine which BDT information the terminal successfully received based on the acknowledgement information.

For example, the AM-PCF network element may determine BDT info 1 and BDT info 2 based on the indication of the AF network element, but the AM-PCF network element chooses to send BDT info 2 to the terminal in the URSP via policy decision. Therefore, if the terminal successfully receives BDT information 2 through the URSP, the AM-PCF network element may indicate BDT information 2 to the AF network element through the acknowledgement information.

For example, in this embodiment of the present application, before step 509, the method may further include: and the AM-PCF network element determines an AF network element. For example, the AM-PCF network element may determine the AF network element based on an identification of the AF network element (e.g., ASP ID).

In the embodiment of the present application, an AM-PCF network element or an SM-PCF network element may directly send information to an AF network element, or may send information to an AF network element through another network element (e.g., an NEF network element). In the embodiments of the present application, it is referred to the description herein whenever communication between an AM-PCF network element or an SM-PCF network element and an AF network element is involved, and details are not described in the following.

It should be appreciated that the AM-PCF network element may perform step 509 in the event that the AM-PCF network element determines that the terminal successfully received the BDT information via the terminal routing policy.

Since the AF network element may indicate one or more BDT information to the AM-PCF network element by the fourth indication. When the AF network element indicates a plurality of BDT information to the AM-PCF network element, the AM-PCF network element may select at least one BDT information from the plurality of BDT information according to the policy decision. The AM-PCF network element may send the at least one BDT information to the terminal in a terminal routing policy. Thus, for example, the acknowledgement information may be BDT information successfully received by the terminal. Or, for example, the acknowledgement information may be an identification of BDT information successfully received by the terminal. Or, for example, the confirmation information may be an identifier of BDT information successfully received by the terminal and at least one BDT information selected by the AM-PCF network element for the terminal. The BDT information successfully received by the terminal belongs to at least one BDT information.

When the AF network element indicates a BDT message to the AM-PCF network element, the AM-PCF network element may send a second indication to the AF network element.

In a fourth possible embodiment, with continuing to refer to fig. 5, the method provided in the embodiment of the present application may further include:

step 510, the AM-PCF network element sends the identification information of the terminal and the second indication to the AF network element, so that the AF network element receives the identification information of the terminal and the second indication. The second indication is used for indicating the terminal to successfully receive the BDT information through the terminal routing strategy.

For example, the identification information of the terminal in the embodiment of the present application may be one or more of the following: an Internet Protocol (IP), a subscription permanent identifier (SUPI), a Permanent Equipment Identifier (PEI), a General Public Subscription Identifier (GPSI), an International Mobile Subscriber Identifier (IMSI), an International Mobile Equipment Identifier (IMEI), an IP address, and a mobile station international integrated services digital network number (MSISDN). In the following embodiments, the identification information related to the terminal may refer to the description herein, and will not be described in detail later.

After step 510, the AF network element may determine, according to the second indication, that the terminal successfully receives the BDT information through the terminal routing policy. In addition, the AF network element may determine, through the identification information of the terminal, a correspondence between the BDT information and the terminal that are successfully received.

In an alternative embodiment, with continuing reference to fig. 5, the method provided in this embodiment of the present application may further include:

step 511, the AM-PCF network element sends a third indication to the UDR or SM-PCF network element, so that the UDR or SM-PCF network element receives the third indication from the AM-PCF network element. The third indication is used to determine BDT information successfully received by the terminal.

Illustratively, the third indication may be BDT information successfully received by the terminal. Or, for example, the third indication may be an identification of BDT information successfully received by the terminal. Or, for example, the third indication may be an identification of BDT information successfully received by the terminal and at least one BDT information selected by the AM-PCF network element for the terminal.

And the terminal sends a third indication to the UDR because the terminal may replace the AM-PCF network element in the moving process, so that the newly selected AM-PCF network element in the moving process of the terminal can determine the BDT information successfully received by the terminal from the UDR. Because the selection of the AM-PCF network element is positioned in front of the SM-PCF network element, and the AM-PCF network element and the SM-PCF network element can share the same UDR, the SM-PCF can also determine the BDT information successfully received by the terminal from the UDR.

It should be noted that, in this embodiment of the present application, if the AM-PCF network element determines that the terminal supports transmitting the BDT information in the URSP, the AM-PCF network element may further notify the SM-PCF network element that the BDT information is not transmitted in the PCC rule. Or the AM-PCF network element may also inform the SM-PCF network element which BDT information may not be transmitted in the PCC rule.

As a possible implementation manner, the step 501 in the embodiment of the present application may be specifically implemented by any one of the following manners 1 to 3:

in the mode 1, the AM-PCF network element acquires the terminal capability information from the SM-PCF network element.

Illustratively, in the PDU session establishment procedure, the terminal reports the terminal capability information to the SMF network element. Then when the SMF network element establishes the SM strategy association, the SMF network element reports the terminal capability information to the SM-PCF network element so that the SM-PCF network element has the terminal capability information. Thus, the AM-PCF network element can send a capability information acquisition request to the SM-PCF network element so as to acquire the terminal capability information from the SM-PCF network element.

As shown in fig. 6, fig. 6 shows a specific process of reporting terminal capability information by a terminal in a PDU session establishment flow:

step 601, the terminal sends a PDU Session Establishment Request (Session Establishment Request) to the AMF network element. Wherein, the PDU session establishment request includes terminal capability information. Illustratively, N1SM Container may be carried in the PDU session setup request. The N1SM Container carries the terminal capability information, and the AMF forwards the N1SM Container to the SMF network element without processing the N1SM Container.

Step 602, the AMF network element selects an SMF network element.

Step 603, the AMF network element sends a PDU Session setup Session management Context Request (Nsmf _ PDU Session _ CreateSM Context Request) to the SMF network element. And the AMF network element sends the terminal capability information received from the terminal to the SMF network element.

Step 604, the SMF network element registers in the UDM network element, and obtains the subscription information of the terminal from the UDM network element.

Step 605, the SMF network element sends a PDU Session setup request Response (Nsmf _ PDU Session _ CreateSM Context Response) to the AMF network element. The SMF network element may reject the PDU session establishment at this step and carry the cause value.

Step 606, authentication/authorization of PDU session.

I.e. the authentication/authorization of the PDU session is done between the UE and the DN.

Step 607, the SMF network element selects the SM-PCF network element and requests the policy rule from the SM-PCF network element. Which may carry terminal capability information.

The related PDU session establishment procedure after step 607 can refer to the description in the prior art, and is not described herein again.

And 2, the AM-PCF network element acquires the terminal capability information from the UDR.

Wherein, the UDR has terminal capability information. Thus, the AM-PCF network element can send a capability information acquisition request to the UDR so as to acquire the terminal capability information from the UDR.

Illustratively, the terminal capability information possessed at the UDR may be acquired by: the SM-PCF network element, after obtaining the terminal capability information, may store the terminal capability information in the UDR so that the UDR has the terminal capability information therein. The terminal sends the terminal capability information to the UDR so that the terminal capability information is present at the UDR. Or, the AM-PCF network element 1 stores the acquired terminal capability information into the UDR. And the AM-PCF network element 1 is an AM-PCF network element before the terminal is replaced.

And in the mode 3, the AM-PCF network element acquires the terminal capability information from the terminal.

Specifically, the terminal reports the terminal capability information to the AM-PCF network element during initial registration, so that the AM-PCF network element obtains the terminal capability information from the terminal.

Exemplary, specific implementation of mode 3: the terminal sends a Registration Request (Registration Request) to the RAN. The Registration Request carries terminal capability information. Illustratively, the Registration Request carries a terminal Policy Container (UE Policy Container). Wherein, the UE Policy Container carries the terminal capability information. Thus the RAN and AMF network elements do not handle the UE Policy Container but forward it to the AM-PCF network element. And the RAN sends Registration Request to the selected AMF network element. And the AMF network element sends the Npcf _ AMPolicyControl _ Get to the AM-PCF network element. Wherein, the Npcf _ amplilicocontrol _ Get carries the terminal capability information.

It should be understood that other processes are also included before the AMF network element goes to the AM-PCF network element, which may specifically refer to the description in the prior art and are not described herein again.

As shown in fig. 7, fig. 7 illustrates another method for transmitting BDT information according to an embodiment of the present application, including the following steps:

step 701, the SM-PCF network element obtains the terminal capability information of the terminal. The terminal capability information is used for indicating that the terminal supports the transmission of the BDT information in the terminal routing strategy of the terminal.

As a possible implementation manner, step 701 in this embodiment may be specifically implemented by the following manner: and the SM-PCF network element acquires the terminal capability information from the terminal.

The specific implementation of the SM-PCF network element obtaining the terminal capability information from the terminal may refer to the description in the above mode 1, and is not described herein again.

Step 702, the SM-PCF network element determines not to transmit the BDT information in the PCC rule according to the terminal capability information.

It should be noted that, in the case that the terminal supports the BDT information transmission in the terminal routing policy of the terminal, the SM-PCF network element may also determine to transmit the BDT information in the PCC rule. However, in order to avoid duplication of BDT information transmitted in the PCC rule and in the terminal routing policy, the BDT information transmitted by the SM-PCF network element in the PCC rule of a different session needs to be different from the BDT information transmitted in the terminal routing policy. The BDT information transmitted in the PCC rules of the same session needs to be the same as the BDT information transmitted in the terminal routing policy.

The embodiment of the application provides a method for transmitting background traffic transmission information, which acquires terminal capability information of a terminal through an SM-PCF network element. Then, when the SM-PCF network element determines that the terminal supports transmitting the background traffic transmission information in the terminal routing policy of the terminal according to the terminal capability information, it can subsequently know that the core network (e.g., AM-PCF network element) transmits the background traffic transmission information in the terminal routing policy of the terminal, and avoids transmitting the BDT information in the PCC rule. This is because if it is not determined whether the terminal supports the transmission of the background traffic transmission information in the terminal routing policy of the terminal, but blindly transmits the background traffic transmission information in the PCC, the same background traffic transmission information is transmitted by the AM-PCF network element in the terminal routing policy, and the second policy controls the collision caused by the transmission of the network element in the PCC rule.

In a first possible embodiment, with continuing reference to fig. 7, the method provided in this embodiment further includes:

and step 703, the SM-PCF network element sends the terminal capability information to the AM-PCF network element or the UDR, so that the AM-PCF network element or the UDR receives the terminal capability information from the SM-PCF network element.

The function of the AM-PCF network element or the UDR to obtain the terminal capability information may refer to the description in the above mode 1 or mode 2, and is not described herein again.

In a second possible embodiment, with continuing reference to fig. 7, an embodiment of the present application provides a method further including: any one of case 1, case 2, or case 3.

Wherein case 1 comprises: step 704-step 707. Case 2 includes: step 708-step 710. Case 3 includes: step 711-step 713.

In a third possible embodiment, with continuing reference to fig. 7, the method provided in this embodiment further includes:

step 704, the AF network element determines to transmit the background traffic transmission information in the PCC rule.

The specific implementation of step 704 may refer to the description at step 503, which is not described herein again.

Step 705, the AF network element sends a first request message to the SM-PCF network element, so that the SM-PCF network element receives the first request message from the AF network element and is used to instruct the SM-PCF network element to transmit the BDT information in the PCC rule.

For example, the specific content of the first request message may refer to the description at step 504, and is not described here again.

Step 706, the SM-PCF network element sends the first response message to the AF network element, so that the AF network element receives the first response message from the SM-PCF network element. The first response message is used to indicate a rejection of transmission of the BDT information in the PCC rule.

For example, the content of the first response message may specifically refer to the description at step 505, and is not described herein again.

Through step 706, the AF network element can timely sense that the SM-PCF network element does not transmit the background traffic transmission information in the PCC rule, so that the AF network element triggers the SM-PCF network element to transmit the BDT information in the terminal routing policy.

It should be noted that, in the case that the terminal supports the BDT information transmission in the URSP, on the one hand, the SM-PCF network element may refuse to transmit any BDT information to the terminal in the PCC rule. On the other hand, the SM-PCF network element may refuse to transmit some BDT information from the terminal or BDT information requested by the AF network element not in the PCC rule. If the SM-PCF network element rejects some BDT information of the terminal or the BDT information requested by the AF network element is not transmitted in the PCC rule, the first response message may carry an identifier of the BDT information rejected for transmission in the PCC rule, or the rejected BDT information.

In a fourth possible embodiment, with continuing reference to fig. 7, the method provided in this embodiment further includes:

step 707 and step 708, and synchronization step 704 and step 705, which are not described herein again.

Step 709, the SM-PCF network element determines not to send the first PCC rule to the SMF network element, where the first PCC rule corresponds to the background traffic transmission information successfully received by the terminal. That is, if the SM-PCF network element determines that the BDT information a has been transmitted in the URSP, the first PCC rule carrying the BDT information a may not be triggered any more.

In the embodiment of the present application, case 1 and case 2 are parallel schemes, and case 1 differs from case 2 in that: in case 1 the SM-PCF network element refuses to transmit the BDT information in the PCC rule. In case 2, for the BDT information successfully received by the terminal, the SM-PCF network element does not trigger the PCC rule, that is, for the background traffic transmission information unsuccessfully received by the terminal or the BDT information not transmitted in the URSP, the SM-PCF network element may still transmit in the PCC rule.

In a fifth possible embodiment, with continuing reference to fig. 7, the method provided in this embodiment further includes:

steps 710 and 711, and synchronization steps 704 and 705, which are not described herein again.

Step 712, the SM-PCF network element sends the second PCC rule to the SMF network element. Such that the SMF network element receives the second PCC rule from the SM-PCF network element. Wherein the second PCC rule corresponds to BDT information that is not transmitted in the terminal routing policy.

Because the SM-PCF network element determines that the terminal supports the transmission of the BDT information in the xBDT mode, after the SM-PCF network element determines the BDT information transmitted in the xBDT mode, in order to avoid the conflict between the transmission of the BDT information in the xBDT mode and the transmission of the BDT information in the BDT mode, the BDT information transmitted in the second PCC rule needs to be ensured not to be transmitted in the terminal routing strategy. I.e. it needs to be ensured that the BDT information transmitted in the second PCC rule is different from the BDT information transmitted in the terminal routing policy.

Illustratively, the SM-PCF network element may determine from the AM-PCF network element or the UDR, BDT information that has been transmitted in the terminal routing policy.

It should be understood that, if the BDT information is requested to be transmitted in the PCC rule, the SM-PCF network element may transmit the BDT information that is not transmitted in the terminal routing policy to the terminal in a BDT manner.

For example, if BDT information 1 is transmitted in the terminal routing policy, the SM-PCF network element may send a second PCC rule to the SMF network element, where the second PCC rule includes BDT information 2.

In the embodiment of the present application, steps 710 to 712 and steps 704 to 706 are parallel schemes, and the difference between steps 704 to 706 and steps 710 to 712 is that: step 704-step 706 the SM-PCF network element rejects the transmission of the background traffic transmission information in the PCC rule. And the SM-PCF network element triggers a second PCC rule for BDT information that is not transported in the terminal routing policy in steps 710-712. The second PCC rule includes BDT information that is not transmitted in the terminal routing policy. That is, case 1 indicates that the SM-PCF network element does not transmit any BDT information for the terminal in the PCC rule, and case 3 indicates that the SM-PCF network element does not transmit BDT information already transmitted in the terminal routing policy in the PCC rule.

In a possible embodiment, the method provided in the embodiment of the present application further includes: and the SM-PCF network element determines the background traffic transmission information successfully received by the terminal.

Specifically, as shown in fig. 7, the determination of the background traffic transmission information successfully received by the terminal by the SM-PCF network element may specifically be implemented through step 713:

step 713, the SM-PCF network element obtains the third indication from the UDR. The third indication is used for determining the background traffic transmission information successfully received by the terminal.

For the specific content of the third indication, reference may be made to the above description, which is not repeated herein.

In a possible embodiment, as shown in fig. 7, the method provided in the embodiment of the present application further includes:

step 714, synchronize step 506. Specifically, the AM-PCF network element in step 506 may be replaced with an SM-PCF network element.

In a possible embodiment, the method provided in the embodiment of the present application further includes: and the SM-PCF network element informs the AM-PCF network element to transmit the BDT information to the terminal by adopting a terminal routing strategy.

It should be appreciated that for BDT information transmitted in the PCC rule, the SM-PCF network element may determine BDT information transmitted to the terminal based on the fourth indication of the AF network element.

It should be noted that, if the AM-PCF network element and the SM-PCF network element are the same PCF network element a, the PCF network element a may transmit the BDT information in the PCC rule, or may transmit the BDT information in the URSP.

As shown in fig. 8, fig. 8 shows a method for transmitting background traffic transmission information according to an embodiment of the present application, including:

step 801, the AM-PCF network element obtains terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of BDT information in the terminal routing policy of the terminal.

The specific implementation manner of step 801 may refer to the description in step 501, which is not described herein again, except that the terminal capability information acquired in step 801 is used to indicate that the terminal does not support transmission of BDT information in the terminal routing policy of the terminal. The terminal does not support the transmission of BDT information in the terminal routing policy of the terminal may also be described as: the terminal does not support the transmission of BDT information in an xBDT mode.

Step 802, the AM-PCF network element determines not to transmit BDT information in the terminal routing strategy according to the terminal capability information.

The embodiment of the application provides a method for transmitting background traffic transmission information, which acquires terminal capability information of a terminal through an AM-PCF network element. And then the AM-PCF network element determines that the terminal does not support the BDT information transmission in the terminal routing strategy according to the terminal capability information, and can determine that the BDT information is not transmitted in the terminal routing strategy of the terminal, so that the problem that the terminal cannot successfully acquire the BDT information from the terminal routing strategy due to the fact that the terminal routing strategy is blindly adopted to transmit the BDT information is avoided, and the reliability of BDT information transmission is improved.

As a possible embodiment, if the AM-PCF network element determines that the terminal does not support the BDT information transmission in the terminal routing policy of the terminal, the AM-PCF network element may further notify the SM-PCF network element to transmit the BDT information of the terminal in the PCC rule.

In a possible embodiment, as shown in fig. 8, the method provided in the embodiment of the present application may further include:

step 803, the AF network element determines that the BDT information needs to be transmitted in the terminal routing policy.

The specific implementation of step 803 can refer to the description at step 503, and the difference from step 503 is that: and the AF network element negotiates with a core network according to the pre-configuration mode, and aims to determine that the BDT information needs to be transmitted in the terminal routing strategy.

Step 804, the AF network element sends a first request message to the AM-PCF network element, where the first request message is used to instruct the AM-PCF network element to transmit BDT information in the terminal routing policy.

Specifically, the content of the first request message may refer to the description at step 504 above, and the difference from step 504 is that: the first request message is used to instruct the AM-PCF network element to transmit the BDT information in the terminal routing policy, that is, when the implementation is performed in step 804, the BDT information transmitted in the PCC rule in the specific implementation manner of step 504 is replaced with: the BDT information is transmitted in the terminal routing policy.

Step 805, the AM-PCF network element sends a first response message to the AF network element, where the first response message is used to indicate that transmission of the BDT information in the terminal routing policy is denied.

For example, a third field may be carried in the first response message, where the third field is used to indicate that the background traffic transmission information is rejected from being transmitted in the terminal routing policy. Or the first response message itself has a meaning indicating a rejection of the transmission of the background traffic transmission information in the terminal routing policy.

It should be noted that, if the AM-PCF network element determines that the terminal does not support BDT information transmission in the BDT mode, the AM-PCF network element sends a first response message to the AF network element.

In a possible implementation manner, the AM-PCF network element may further send a first cause value to the AF network element, where the first cause value is used for enabling the AF network element to determine a cause for rejecting transmission of the BDT information in the terminal routing policy. For example, the first cause value may be that the terminal does not support transmission of BDT information in the terminal routing policy.

The AF network element can determine in time that the AM-PCF network element refuses to transmit the BDT information in the terminal routing policy through step 805. And the AF network element can trigger the SM-PCF network element to transmit the BDT information in the PCC rule.

step 806, the AM-PCF network element sends the first notification message to the AF network element, so that the AF network element receives the first notification message from the AM-PCF network element. The first notification message is used to indicate transmission of BDT information in the PCC rule. After obtaining the first notification message, the AF network element may determine that the SM-PCF network element may be triggered to transmit the BDT information in the PCC rule. It should be understood that the PCC rule carries the BDT information, that is, the PCC rule is generated according to the BDT information.

steps 807-808, synchronization step 803-804, which are not described herein again.

Step 809, the AM-PCF network element sends a terminal routing policy to the terminal, the terminal routing policy not including the BDT information.

It should be understood that, since the terminal does not support the xBDT mode transmission, the terminal routing policy sent by the AM-PCF network element to the terminal does not include BDT information.

It should be understood that in the embodiment shown in fig. 8, the AM-PCF network element may also store the terminal capability information in the UDR or send the terminal capability information to the SM-PCF network element.

It should be understood that steps 807-809 and steps 803-805 in the embodiment of the present application are parallel schemes.

As shown in fig. 9, fig. 9 shows a method for transmitting background traffic transmission information according to an embodiment of the present application, including:

step 901, the SM-PCF network element obtains terminal capability information of the terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of BDT information in the terminal routing policy of the terminal.

Specifically, step 901 can be implemented by: and the SM-PCF network element acquires the terminal capability information from the terminal.

The specific implementation of step 901 may refer to the description at step 701, and the differences are that: and the terminal capability information acquired by the SM-PCF network element is used for indicating that the terminal does not support the BDT information transmission in the terminal routing strategy of the terminal.

And step 902, the SM-PCF network element determines to transmit the BDT information in the PCC rule according to the terminal capability information.

As a possible embodiment, when the SM-PCF network element determines that the terminal does not support the BDT information transmission in the terminal routing policy of the terminal, the SM-PCF network element may also notify the AM-PCF network element that the BDT information transmission in the terminal routing policy is not needed.

According to the method, the SM-PCF network element determines that the terminal does not support the BDT information transmission in the terminal routing strategy of the terminal according to the terminal capability information, so that the BDT information transmission in the PCC rule can be determined, and the terminal can acquire the BDT information from the PCC rule.

In a possible embodiment, continuing with fig. 9, the method provided in this embodiment further includes:

step 903-step 906, synchronization step 803-step 806, with the difference that: when implemented by steps 903-906, the AM-PCF network element in steps 803-806 is replaced with: and the SM-PCF network element.

step 907-step 908, synchronization step 803-step 804, with the difference that: when implemented by steps 907-908, the AM-PCF network element in steps 803-804 is replaced with: and the SM-PCF network element.

And step 909, the SM-PCF network element sends a PCC rule to the SMF network element, wherein the PCC rule comprises BDT information.

It should be understood that in the embodiment shown in fig. 9, the SM-PCF network element may also store the terminal capability information in the UDR or send the terminal capability information to the AM-PCF network element.

It should be noted that, in the embodiment shown in fig. 9, the SM-PCF network element may determine the BDT information transmitted in the PCC rule based on the request of the AF network element.

It should be noted that the embodiments of the present application may be referred to or referred to, for example, the same or similar steps, method embodiments and apparatus embodiments may be referred to, without limitation.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that, in order to implement the above functions, the first policy control network element, the application function network element, and the second policy control network element include hardware structures and/or software modules corresponding to the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the first policy control network element, the application function network element, and the second policy control network element may be divided into function modules according to the above method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

For example, in the case of dividing each functional module in an integrated manner, fig. 10 is a schematic structural diagram illustrating an apparatus for transmitting background traffic transmission information. The device for transmitting the background traffic transmission information comprises: a processing module 1001 and a communication module 1002.

Optionally, the apparatus for transmitting background traffic transmission information may further include: the storage module 1003 is configured to store the terminal capability information.

An example, the apparatus for transmitting the background traffic transmission information may be: the first policy control network element may also be a chip applied to the first policy control network element. Wherein, the processing module 1001 is configured to support the first policy control network element to execute step 502 in the foregoing embodiment. A communication module 1002, configured to support the first policy control network element to perform step 501 in the foregoing embodiment.

In a possible implementation manner, the communication module 1002 is further configured to support the first policy control network element to perform step 505, step 506, step 507, step 508, step 509, step 510, and step 511 in the foregoing embodiments.

For another example, the device for transmitting the background traffic transmission information may be: the application function network element can also be a chip applied to the application function network element. Wherein, the processing module 1001 is configured to support the application function network element to execute step 503 in the foregoing embodiment. A communication module 1002, configured to enable an application function network element to perform step 504 in the foregoing embodiment.

In a possible implementation manner, the communication module 1002 is further configured to support an application function network element, and perform the step of acquiring, from the first policy control network element, the confirmation information, the first response message, the identification information and the second indication of the terminal, and the first notification message in the foregoing embodiment.

As another example, the apparatus for transmitting the background traffic transmission information may be: the second policy control network element may also be a chip applied to the second policy control network element. Wherein, the processing module 1001 is configured to support the second policy control network element to execute step 702 in the foregoing embodiment. A communication module 1002, configured to support the second policy control network element to perform step 701 in the foregoing embodiment.

In a possible implementation manner, the communication module 1002 is further configured to support the second policy control network element to perform step 703, step 706, step 712, step 713, and step 714 in the foregoing embodiment. The processing module 1001 is further configured to support the second policy control network element to perform step 709 in the foregoing embodiment.

As another example, the apparatus for transmitting the background traffic transmission information may be: the application function network element can also be a chip applied to the application function network element. Wherein, the processing module 1001 is configured to support the application function network element to execute step 704 in the foregoing embodiment. A communication module 1002, configured to support an application function network element to perform step 705 in the foregoing embodiment. Or the processing module 1001, is configured to support the application function network element to perform step 707 in the foregoing embodiment. A communication module 1002, configured to enable the application function network element to perform step 708 in the foregoing embodiment. Or, the processing module 1001 is configured to support the application function network element to perform step 710 in the foregoing embodiment. A communication module 1002, configured to support the application function network element to perform step 711 in the foregoing embodiment.

As another example, the apparatus for transmitting the background traffic transmission information may be: the first policy function network element may also be a chip applied to the first policy function network element. Wherein, the processing module 1001 is configured to support the first policy function network element to execute step 802 in the foregoing embodiment. A communication module 1002, configured to support a first policy function network element, and execute step 801 in the foregoing embodiment.

In a possible implementation manner, the communication module 1002 is further configured to support the first policy control network element to perform step 805, step 806, and step 809 in the foregoing embodiment.

As another example, the apparatus for transmitting the background traffic transmission information may be: the application function network element can also be a chip applied to the application function network element. Wherein, the processing module 1001 is configured to support the application function network element to execute the step 803 in the foregoing embodiment. A communication module 1002, configured to support an application function network element to perform step 804 in the foregoing embodiment. Or, the processing module 1001 is configured to support the application function network element to perform step 807 in the foregoing embodiment. A communication module 1002, configured to enable the application function network element to perform step 808 in the foregoing embodiment.

As another example, the apparatus for transmitting the background traffic transmission information may be: the second policy control network element may also be a chip applied to the second policy control network element. Wherein, the processing module 1001 is configured to support the second policy control network element to execute step 902 in the foregoing embodiment. A communication module 1002, configured to support the second policy control network element to perform step 901 in the foregoing embodiment.

In a possible implementation manner, the communication module 1002 is further configured to support the second policy control network element to perform steps 905, 906, and 909 in the foregoing embodiments.

As another example, the apparatus for transmitting the background traffic transmission information may be: the application function network element can also be a chip applied to the application function network element. Wherein, the processing module 1001 is configured to support the application function network element to execute step 903 in the foregoing embodiment. A communication module 1002, configured to enable an application function network element to perform step 904 in the foregoing embodiment. Or, the processing module 1001 is configured to support the application function network element to perform step 907 in the foregoing embodiment. A communication module 1002, configured to enable an application function network element to perform step 908 in the foregoing embodiment.

In the present embodiment, the device for transmitting background traffic transmission information is presented in a form of dividing each functional module in an integrated manner. A "module" herein may refer to a particular ASIC, a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other device that provides the described functionality. In a simple embodiment, those skilled in the art can appreciate that the device for transmitting background traffic transmission information can take the form shown in fig. 4. That is, the processing module 1001 may be implemented by hardware as the processor 401. The communication module 1002, when implemented in hardware, may be the communication interface 404.

For example, the processor 401 in fig. 4 may invoke a computer stored in the memory 403 to execute the instructions, so that the first policy control network element performs step 501, step 502, step 505, step 506, step 507, step 508, step 509, step 510, and step 511 in the above method embodiments.

Since the first policy control network element provided in this embodiment may execute the corresponding method, the technical effect obtained by the first policy control network element may refer to the method embodiment, and is not described herein again.

For example, the processor 401 in fig. 4 may cause the application function network element to perform steps 503 and 504 in the above method embodiment by calling a computer stored in the memory 403 to execute the instructions.

Since the application function network element provided in this embodiment can execute the corresponding method, the technical effect obtained by the application function network element can refer to the method embodiment, and is not described herein again.

For example, the processor 401 in fig. 4 may invoke a computer stored in the memory 403 to execute the instructions, so that the second policy control network element performs steps 701, 702, 703, 706, 709, 712, 713, and 714 in the above method embodiments.

Since the second policy control network element provided in this embodiment may execute the corresponding method, the technical effect obtained by the second policy control network element may refer to the method embodiment, and is not described herein again.

For example, the processor 401 in fig. 4 may cause the application function network element to perform steps 704 and 705 in the above-described method embodiment by calling a computer stored in the memory 403 to execute instructions.

Or the processor 401 in fig. 4 may cause the application function network element to perform step 707, step 708 in the above-described method embodiment by calling a computer executing instruction stored in the memory 403. Or the processor 401 in fig. 4 may cause the application function network element to perform steps 710 and 711 in the above-described method embodiments by calling the computer-executable instructions stored in the memory 403.

For example, the processor 401 in fig. 4 may cause the first policy control network element to perform steps 801, 802, 805, 806, and 809 in the above-described method embodiments by calling a computer stored in the memory 403 to execute the instructions.

For example, the processor 401 in fig. 4 may cause the application function network element to perform step 803 and step 804 in the above-described method embodiment by calling a computer stored in the memory 403 to execute the instructions. Alternatively, the processor 401 in fig. 4 may cause the application function network element to perform steps 807 and 808 in the above-described method embodiments by calling a computer executing instruction stored in the memory 403.

For example, the processor 401 in fig. 4 may invoke a computer stored in the memory 403 to execute the instructions, so that the second policy control network element performs steps 901, 902, 905, 906, and 909 in the above method embodiments.

For example, the processor 401 in fig. 4 may cause the application function network element to perform steps 903 and 904 in the above method embodiment by calling a computer stored in the memory 403 to execute the instructions. Or the processor 401 in fig. 4 may cause the application function network element to perform step 907 and step 908 in the above-described method embodiments by calling a computer stored in the memory 403 to execute the instructions.

In particular, the functions/implementation procedures of the communication module 1002 and the processing module 1001 in fig. 10 may be implemented by the processor 401 in fig. 4 calling a computer executing instructions stored in the memory 403. Alternatively, the function/implementation procedure of the processing module 1001 in fig. 10 may be implemented by the processor 401 in fig. 4 calling a computer executing instruction stored in the memory 403, and the function/implementation procedure of the communication module 1002 in fig. 10 may be implemented by the communication interface 404 in fig. 4.

It should be understood that the above division of the modules in the first policy control network element, the second policy control network element, and the application function network element is only a division of logical functions, and may be wholly or partially integrated into one physical entity or physically separated in actual implementation. Modules in the first policy control network element, the second policy control network element or the application function network element can be all realized in a form that software is called by the processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of software called by the processing element, and part of the modules can be realized in the form of hardware. For example, each module may be a processing element separately set up, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory in the form of a program, and is invoked by a processing element of the first policy control network element, the second policy control network element, or the application function network element to execute the function of the unit. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In the implementation process, the steps of the method or the modules above may be implemented by integrated logic circuits of hardware in a processor element or in a form called by software through the processor element.

In one example, the modules or units in any of the above apparatus may be one or more integrated circuits configured to implement the above method, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. As another example, when the module in the first network element or the second network element or the access device or the session management network element may be implemented in the form of a Processing element scheduler, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling a program. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above communication module is an interface circuit or a communication interface of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the communication module is an interface circuit or a communication interface for the chip to receive signals from or transmit signals to other chips or devices.

When the above modules or units are implemented in hardware, the hardware may be any one or any combination of a CPU, a microprocessor, a Digital Signal Processing (DSP) chip, a Micro Controller Unit (MCU), an artificial intelligence processor, an ASIC, an SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator, or a non-integrated discrete device, which may run necessary software or is independent of software to perform the above method flow.

Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a system-on-chip), where the communication device includes a processor, and is configured to implement the method in any of the above method embodiments. In one possible design, the communication device further includes a memory. The memory for storing the necessary program instructions and data, the processor may call the program code stored in the memory to instruct the communication device to perform the method of any of the above-described method embodiments. Of course, the memory may not be in the communication device. When the communication device is a chip system, the communication device may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application. The structure of the communication device can be seen in fig. 4, and is not described herein again.

In the above embodiments, the instructions stored by the memory for execution by the processor may be implemented in the form of a computer program product. The computer program product may be written in the memory in advance or may be downloaded in the form of software and installed in the memory.

The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). A computer-readable storage medium may be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

In one aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a first policy control network element or a chip applied in the first policy control network element to perform steps 501, 502, 505, 506, 507, 508, 509, 510, and 511 in the embodiments.

In a further aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause an application function network element or a chip applied in the application function network element to execute steps 503 and 504 in the above method embodiments.

In still another aspect, a computer storage medium is provided, where instructions are stored in the computer storage medium, and when the instructions are executed, the instructions cause a second policy control network element or a chip applied in the second policy control network element to perform steps 701, 702, 703, 706, 709, 712, 713, and 714 in the above method embodiments.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause an application function network element or a chip applied in the application function network element to perform steps 704 and 705 in the above method embodiments.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause a first policy control network element or a chip applied in the first policy control network element to perform steps 801, 802, 805, 806, and 809 in the above method embodiments.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause an application function network element or a chip applied in the application function network element to perform steps 803 and 804 in the above method embodiments.

In still another aspect, a computer storage medium is provided, where instructions are stored in the computer storage medium, and when the instructions are executed, the instructions cause a second policy control network element or a chip applied in the second policy control network element to perform steps 901, 902, 905, 906, and 909 in the above method embodiments.

In still another aspect, a computer storage medium is provided, in which instructions are stored, and when executed, the instructions cause an application function network element or a chip applied in the application function network element to perform steps 903 and 904 in the above method embodiments.

The aforementioned readable storage medium may include: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

In one aspect, a computer program product comprising instructions stored therein is provided, and when the instructions are executed, the instructions cause a first policy control network element or a chip applied in the first policy control network element to perform steps 501, 502, 505, 506, 507, 508, 509, 510, and 511 in the embodiments.

In a further aspect, a computer program product is provided, which contains instructions stored therein, which when executed, cause an application function network element or a chip applied in the application function network element to execute steps 503 and 504 in the above method embodiments.

In another aspect, a computer program product containing instructions is provided, where the instructions are stored in the computer program product, and when the instructions are executed, the instructions cause the second policy control network element or a chip applied in the second policy control network element to perform steps 701, 702, 703, 706, 709, 712, 713, and 714 in the above method embodiments.

In a further aspect, a computer program product is provided, which comprises instructions stored therein, which when executed, cause an application function network element or a chip applied in the application function network element to perform steps 704 and 705 in the above-mentioned method embodiments.

In still another aspect, a computer program product containing instructions is provided, in which the instructions are stored, and when the instructions are executed, the instructions cause the first policy control network element or a chip applied in the first policy control network element to perform steps 801, 802, 805, 806, and 809 in the above method embodiments.

In another aspect, a computer program product containing instructions is provided, in which the instructions are stored, and when the instructions are executed, the instructions cause an application function network element or a chip applied in the application function network element to execute steps 803 and 804 in the above method embodiments.

In still another aspect, a computer program product containing instructions is provided, where the instructions are stored in the computer program product, and when the instructions are executed, the instructions cause a second policy control network element or a chip applied in the second policy control network element to perform steps 901, 902, 905, 906, and 909 in the above method embodiments.

In another aspect, a computer program product containing instructions is provided, in which the instructions are stored, and when the instructions are executed, the instructions cause an application function network element or a chip applied in the application function network element to perform steps 903 and 904 in the above method embodiments.

In one aspect, a chip is provided, where the chip is applied to a first policy control network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform step 501, step 502, step 505, step 506, step 507, step 508, step 509, step 510, and step 511 in the embodiments.

In another aspect, a chip is provided, where the chip is applied to an application function network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 503 and 504 in the embodiments.

In another aspect, a chip is provided, where the chip is applied to a second policy control network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform step 701, step 702, step 703, step 706, step 709, step 712, step 713, and step 714 in the embodiments.

In another aspect, a chip is provided, where the chip is applied to an application function network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 704 and 705 in the embodiments.

In another aspect, a chip is provided, where the chip is applied in a first policy control network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 801, 802, 805, 806, and 809 in the embodiments.

In another aspect, a chip is provided, where the chip is applied in an application function network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 803 and 804 in the embodiments.

In another aspect, a chip is provided, where the chip is applied in a second policy control network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 901, 902, 905, 906, and 909 in the embodiments.

In another aspect, a chip is provided, where the chip is applied to an application function network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to perform steps 903 and 904 in the embodiments.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for transmitting background traffic transmission information, comprising:

a first policy control network element acquires terminal capability information of a terminal, wherein the terminal capability information is used for indicating that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal;

and the first strategy control network element determines to transmit background flow transmission information in the terminal routing strategy according to the terminal capability information.

2. The method of claim 1, further comprising:

the first policy control network element receives a first request message from an application function network element, where the first request message is used to instruct the first policy control network element to transmit the background traffic transmission information in a Policy and Charging Control (PCC) rule;

and the first policy control network element sends a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the PCC rule is rejected.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and the first policy control network element sends a first notification message to an application function network element, wherein the first notification message is used for indicating background traffic transmission information to be transmitted in the terminal routing policy.

4. The method according to any one of claims 1-3, further comprising:

the first policy control network element receives a first indication, where the first indication is used to indicate that the terminal successfully receives the background traffic transmission information through the terminal routing policy;

and the first policy control network element sends confirmation information to an application function network element, wherein the confirmation information is used for the application function network element to determine the background traffic transmission information successfully received by the terminal.

5. The method of claim 4, further comprising:

and the first policy control network element sends the identification information of the terminal and a second instruction to an application function network element, wherein the second instruction is used for indicating the terminal to successfully receive the background traffic transmission information through the terminal routing policy.

6. The method according to any one of claims 1-5, further comprising:

and the first policy control network element sends a third instruction to a user data management network element or a second policy control network element, wherein the third instruction is used for determining background traffic transmission information successfully received by the terminal.

7. The method according to any of claims 1-6, wherein the obtaining, by the first policy control network element, terminal capability information of the terminal comprises:

the first strategy control network element acquires the terminal capacity information from a second strategy control network element; alternatively, the first and second electrodes may be,

the first policy control network element acquires the terminal capability information from a user data management network element; alternatively, the first and second electrodes may be,

and the first policy control network element acquires the terminal capability information from the terminal.

8. A method for transmitting background traffic transmission information, comprising:

a first policy control network element acquires terminal capability information of a terminal, wherein the terminal capability information is used for indicating that the terminal does not support background traffic transmission information transmitted in a terminal routing policy of the terminal;

and the first strategy control network element determines not to transmit background flow transmission information in the terminal routing strategy according to the terminal capability information.

9. The method of claim 8, wherein the obtaining, by the first policy control network element, terminal capability information of the terminal comprises:

10. The method according to claim 8 or 9, characterized in that the method further comprises:

the first policy control network element receives a first request message from an application function network element, where the first request message is used to instruct the first policy control network element to transmit the background traffic transmission information in a terminal routing policy;

and the first policy control network element sends a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the terminal routing policy is rejected.

11. The method according to any one of claims 8 or 9, further comprising:

the first policy control network element sends a first notification message to an application function network element, where the first notification message is used to indicate that background traffic transmission information is transmitted in a PCC rule.

12. The method according to any one of claims 8-10, further comprising:

and the first policy control network element sends the terminal routing policy to the terminal, wherein the terminal routing policy does not include the background traffic transmission information.

13. An apparatus for transmitting background traffic transmission information, comprising: a communication module and a processing module;

the communication module is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal;

and the processing module is used for determining background flow transmission information to be transmitted in the terminal routing strategy according to the terminal capability information.

14. The apparatus of claim 13, wherein the communication module is further configured to receive a first request message from an application function network element, and wherein the first request message is used to instruct the apparatus to transmit the background traffic transmission information in a Policy and Charging Control (PCC) rule;

the communication module is further configured to send a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the PCC rule is rejected.

15. The apparatus of claim 13 or 14, wherein the communication module is further configured to send a first notification message to an application function network element, and the first notification message is used to indicate that background traffic transmission information is transmitted in the terminal routing policy.

16. The apparatus according to any of claims 13-15, wherein the communication module is further configured to receive a first indication, where the first indication indicates that the terminal successfully receives the background traffic transmission information through the terminal routing policy;

the communication module is further configured to send acknowledgement information to an application function network element, where the acknowledgement information is used for the application function network element to determine background traffic transmission information that is successfully received by the terminal.

17. The apparatus of claim 16, wherein the communication module is further configured to send, to an application function network element, identification information of the terminal and a second indication, and the second indication is used to indicate that the terminal successfully receives the background traffic transmission information through the terminal routing policy.

18. The apparatus according to any of claims 13-17, wherein the communication module is further configured to receive a first indication indicating that the terminal successfully received the background traffic transmission information via the terminal routing policy;

the communication module is further configured to send a third instruction to the user data management network element or the second policy control network element, where the third instruction is used to determine the background traffic transmission information that is successfully received by the terminal.

19. The apparatus according to any of claims 13-18, wherein the communication module is specifically configured to obtain the terminal capability information from a second policy control network element; alternatively, the first and second electrodes may be,

the communication module is specifically configured to acquire the terminal capability information from a user data management network element; alternatively, the first and second electrodes may be,

the communication module is specifically configured to acquire the terminal capability information from the terminal.

20. An apparatus for transmitting background traffic transmission information, comprising: a communication module and a processing module;

the communication module is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of background traffic transmission information in a terminal routing policy of the terminal;

and the processing module is used for determining that background flow transmission information is not transmitted in the terminal routing strategy according to the terminal capability information.

21. The apparatus of claim 20, wherein the communication module is specifically configured to obtain the terminal capability information from a second policy control network element; alternatively, the first and second electrodes may be,

22. The apparatus according to claim 20 or 21, wherein the communication module is further configured to receive a first request message from an application function network element, where the first request message is used to instruct the apparatus to transmit the background traffic transmission information in a terminal routing policy;

the communication module is further configured to send a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the terminal routing policy is rejected.

23. The apparatus of any one of claims 20 or 21, wherein the communication module is further configured to send a first notification message to an application function network element, and wherein the first notification message is used to indicate that background traffic transmission information is transmitted in a PCC rule.

24. The apparatus of any of claims 20-23, wherein the communication module is further configured to send the terminal routing policy to the terminal, and wherein the terminal routing policy does not include the background traffic transmission information.

25. A communication system, the communication system comprising: a first policy control network element and an application function network element;

the first policy control network element is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal supports transmission of background traffic transmission information in a terminal routing policy of the terminal; the first policy control network element is further configured to determine, according to the terminal capability information, to transmit background traffic transmission information in the terminal routing policy;

the application function network element is configured to send a first request message to the first policy control network element, where the first request message is used to instruct the first policy control network element to transmit background traffic transmission information in the PCC rule;

the first policy control network element is further configured to send a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the PCC rule is rejected.

26. A communication system, the communication system comprising: a first policy control network element and an application function network element;

the first policy control network element is configured to acquire terminal capability information of a terminal, where the terminal capability information is used to indicate that the terminal does not support transmission of background traffic transmission information in a terminal routing policy of the terminal;

the first policy control network element is further configured to determine, according to the terminal capability information, that background traffic transmission information is not transmitted in the terminal routing policy;

the application function network element is configured to send a first request message to the first policy control network element, where the first request message is used to instruct the first policy control network element to transmit the background traffic transmission information in a terminal routing policy;

the first policy control network element is further configured to send a first response message to the application function network element, where the first response message is used to indicate that transmission of the background traffic transmission information in the terminal routing policy is rejected.