CN116867112A

CN116867112A - Redundant transmission request method and device

Info

Publication number: CN116867112A
Application number: CN202210922398.9A
Authority: CN
Inventors: 王亚鑫; 孙海洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-03-28
Filing date: 2022-08-02
Publication date: 2023-10-10

Abstract

The embodiment of the application provides a redundant transmission request method and a device, relates to the technical field of communication, and can dynamically trigger the establishment of redundant transmission according to PER requirements. The method comprises the following steps: the time delay sensitive communication and time synchronization network element obtains the error rate PER requirement and PER information; the time delay sensitive communication and time synchronization network element determines to establish a double redundancy session according to PER requirements and PER information; or the time delay sensitive communication and time synchronization network element determines to establish a double N3/N9 redundant transmission path according to PER requirements and PER information.

Description

Redundant transmission request method and device

The present application claims priority from the national intellectual property agency, application number 202210313823.4, chinese patent application entitled "redundant transmission request method and apparatus", filed 28 at 2022, 03, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for redundancy transmission request.

Background

In a fifth generation (5G) communication system, for end-to-end redundancy transmission, a terminal device may establish two inter-related protocol data unit (protocol data unit, PDU) sessions (also may be described as dual redundancy sessions) to send two redundant data and Data Networks (DNs) to implement redundancy transmission, and may also implement redundancy transmission with the data networks through dual N3/N9 tunnels.

For the dual redundancy session, the access and mobile control policy control network element may update the routing policy (user equipment route selection policy, urs) rule of the terminal device according to the application function network element request (application function request, AF request), and the terminal device may initiate a dual redundancy session establishment request or release request according to the updated urs rule.

However, both the above-mentioned process of establishing or releasing the dual-redundancy session and the process of establishing or releasing the dual-N3/N9 tunnel only support pre-configuration, and cannot dynamically trigger the establishment or release of redundancy transmission in the data transmission process. Therefore, how to dynamically trigger the establishment or release of redundant transmission is a technical problem to be solved.

Disclosure of Invention

In view of this, the embodiments of the present application provide a method and an apparatus for requesting redundant transmission, which can dynamically trigger the establishment of redundant transmission according to PER requirements.

In a first aspect, an embodiment of the present application provides a redundant transmission request method, where the method includes: the time delay sensitive communication and time synchronization network element obtains the error rate PER requirement and PER information; the time delay sensitive communication and time synchronization network element determines to establish a double redundancy session according to PER requirements and PER information; or the time delay sensitive communication and time synchronization network element determines to establish a double N3/N9 redundant transmission path according to PER requirements and PER information.

Based on the first aspect, the delay sensitive communication and time synchronization network element can determine to establish a double N3/N9 redundancy transmission path or establish a double redundancy session according to PER requirements and PER information, namely can dynamically trigger the establishment of redundancy transmission according to the PER requirements, and ensures the realization of the PER requirements while carrying out the redundancy transmission.

In one possible design, a delay sensitive communication and time synchronization network element receives PER requirements from an application function network element; alternatively, the delay sensitive communication and time synchronization network element receives PER requirements from the network presentation network element.

Based on the possible design, the delay sensitive communication and time synchronization network element can acquire the PER requirement from the application function network element, and can also acquire the PER requirement from the application function network element through the network presentation network element, thereby providing various feasibility schemes for the delay sensitive communication and time synchronization network element to acquire the PER requirement.

In one possible design, the delay sensitive communication and time synchronization network element also receives routing parameters and application information from the application function network element; wherein the application information is used to indicate that the application supports redundant transmission.

In one possible design, the delay sensitive communication and time synchronization network element also receives indication information from the application function network element indicating support for dynamically establishing the dual redundancy session.

In one possible design, the PER information includes one or more of the following: PER information of an access network element, PER information of a user plane network element, PER information between the access network element and the user plane network element, and PER information from terminal equipment to the user plane network element.

In one possible design, a delay sensitive communication and time synchronization network element receives PER information from a network management system; or the time delay sensitive communication and time synchronization network element sends a first request to the session management network element through the session management policy control network element according to PER requirements; the time delay sensitive communication and time synchronization network element receives PER information from the session management network element; the first request is used for requesting to collect PER information and reporting the PER information; or the time delay sensitive communication and time synchronization network element subscribes PER information to the target network element according to PER requirements, and the time delay sensitive communication and time synchronization network element receives PER information from the target network element; the target network element comprises an access network element and a user plane network element.

Based on the two possible designs, the delay sensitive communication and time synchronization network element can acquire PER information in any of the modes, and various feasibility schemes are provided for the delay sensitive communication and time synchronization network element to acquire PER information.

In one possible design, the PER information includes one or more of the following: the method comprises the steps of PER state of a service, PER capability information, packet error rate of the service, packet loss rate of the service, and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement of redundant transmission.

Based on the possible design, the PER information can be PER state of service or PER capability information of network element, so that the time delay sensitive communication and time synchronization network element can reasonably establish redundant transmission paths according to PER requirements and PER information.

In one possible design, the delay sensitive communication and time synchronization network element sends a second request to the access and mobility control policy control network element; the second request is used for requesting to update a routing policy URSP rule of the terminal equipment; or the time delay sensitive communication and time synchronization network element stores a third request to the network storage network element; wherein the third request is for the network storage element to instruct the access and mobility control policy control element to update the urs p rules.

Based on the possible design, the delay sensitive communication and time synchronization network element can trigger the URSP rule update through the second request, and can also trigger the URSP rule update through the third request, so that a plurality of feasibility schemes are provided for triggering the URSP rule update.

In one possible design, the delay sensitive communication and time synchronization network element determines access and mobility control policy control network elements through binding support function network elements; the delay sensitive communication and time synchronization network element sends a second request to the access and mobility control policy control network element.

In one possible design, the second request includes one or more of the following: routing parameters, application function network element information, application traffic descriptors; alternatively, the third request includes one or more of the following: routing parameters, application function network element information, application traffic descriptors.

In one possible design, the delay sensitive communication and time synchronization network element receives one or more of the following information from the application function network element: routing parameters, application function network element information, application traffic descriptors; the delay sensitive communication and time synchronization network element sends a third request to the network storage network element.

In one possible design, a delay sensitive communication and time synchronization network element receives a urs p update notification from an access and mobility control policy control network element; the time delay sensitive communication and time synchronization network element sends a urs update notification to the application function network element.

Based on this possible design, the delay sensitive communication and time synchronization network element may also send a urs update notification to the application function network element to cause the application function network element to trigger the terminal device to establish the dual redundancy session.

In one possible design, the delay-sensitive communication and time synchronization network element sends first indication information to the application function network element; the first indication information is used for indicating the establishment of the dual-redundancy session.

Based on the possible design, the delay sensitive communication and time synchronization network element may further send first indication information to the application function network element, so that the application function network element triggers the access and mobile control policy to control the network element to update the urs rules, and further triggers the terminal device to establish the dual redundancy session.

In one possible design, the delay sensitive communication and time synchronization network element sends the second indication information to the session management network element; the second indication information is used for indicating to establish a double N3/N9 redundant transmission path.

Based on the possible design, the time delay sensitive communication and time synchronization network element can also trigger the session management network element to establish a double N3/N9 redundant transmission path by sending the second indication information.

In a second aspect, an embodiment of the present application provides a communication device, where the communication device may implement the functions performed by the delay sensitive communication and time synchronization network elements in the first aspect or the possible designs of the first aspect, where the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for acquiring the PER requirement and PER information of the error rate; the processing module is used for determining to establish a double-redundancy session according to PER requirements and PER information; or, the method is used for determining to establish a double N3/N9 redundant transmission path according to PER requirements and PER information.

In one possible design, the transceiver module is further configured to receive a PER requirement from the application function network element; or, the transceiver module is further configured to receive a PER requirement from the network presentation network element.

In one possible design, the transceiver module is further configured to receive a routing parameter and application information from the application function network element; wherein the application information is used to indicate that the application supports redundant transmission.

In a possible design, the transceiver module is further configured to receive indication information from the application function network element for indicating support for dynamically establishing the dual redundancy session.

In one possible design, the transceiver module is further configured to receive PER information from the network management system; or, the transceiver module is further configured to send, according to the PER requirement, a first request to the session management network element through the session management policy control network element; receiving PER information from a session management network element; the first request is used for requesting to collect PER information and reporting the PER information; or, the transceiver module is further configured to subscribe PER information to the target network element according to the PER requirement, and receive the PER information from the target network element; the target network element comprises an access network element and a user plane network element.

In one possible design, the PER information includes one or more of the following: the method comprises the steps of determining the PER state of a service, PER capability information of a target network element, the packet error rate of the service, the packet loss rate of the service and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement and redundant transmission cannot be performed.

In a possible design, the transceiver module is further configured to send a second request to the access and mobility control policy control network element; the second request is used for requesting to update a routing policy URSP rule of the terminal equipment; or, the transceiver module is further configured to store the third request to the network storage network element; wherein the third request is for the network storage element to instruct the access and mobility control policy control element to update the urs p rules.

In one possible design, the transceiver module is further configured to determine an access and mobility control policy control network element by binding the support function network element; and the receiving and transmitting module is also used for transmitting a second request to the access and mobile control strategy control network element.

In a possible design, the transceiver module is further configured to receive one or more of the following information from the application function network element: routing parameters, application function network element information, application traffic descriptors; and the receiving and transmitting module is also used for transmitting a third request to the network storage network element.

In one possible design, the transceiver module is further configured to receive a urs p update notification from the access and mobility control policy control network element; and sending a urs update notification to the application function network element.

In one possible design, the transceiver module is further configured to send first indication information to the application function network element; the first indication information is used for indicating the establishment of the dual-redundancy session.

In one possible design, the transceiver module is further configured to send second indication information to the session management network element; the second indication information is used for indicating to establish a double N3/N9 redundant transmission path.

It should be noted that, in the second aspect, specific implementation manners of the communication apparatus may refer to the behavior functions of the delay sensitive communication and the time synchronization network element in the redundant transmission request method provided in the first aspect or any one of possible designs of the first aspect.

In a third aspect, embodiments of the present application provide a communication device, which may be a delay-sensitive communication and time-synchronized network element or a chip or a system on a chip in a delay-sensitive communication and time-synchronized network element. The communication device may implement the functions performed by the delay sensitive communication and time synchronization network elements in the aspects described above or in each possible design, which may be implemented by hardware. In one possible design, the communication device may include: a transceiver and a processor. The transceiver and processor may be adapted to support the communication device to implement the functionality referred to in the above-described first aspect or any one of the possible designs of the first aspect. For example: the transceiver may be configured to obtain a bit error rate PER requirement and PER information; the processor may be configured to determine to establish a dual redundancy session based on the PER requirements and PER information; or, the method is used for determining to establish a double N3/N9 redundant transmission path according to PER requirements and PER information. In yet another possible design, the communication device may further include a memory for holding computer-executable instructions and data for the communication device. The transceiver and processor execute the computer-executable instructions stored by the memory when the communication device is operating to cause the communication device to perform the redundant transmission request method as described above in the first aspect or any one of the possible designs of the first aspect.

In this embodiment, the specific implementation manner of the communication apparatus in the third aspect may refer to the behavior function of the delay sensitive communication and the time synchronization network element in the redundancy transmission request method provided in the first aspect or any one of possible designs of the first aspect.

In a fourth aspect, an embodiment of the present application provides a redundant transmission request method, including: the session management network element obtains the error rate PER requirement and PER information; the session management network element determines to establish a dual-redundancy session according to PER requirements and PER information; or the session management network element determines to establish a double N3/N9 redundant transmission path according to the PER requirement and PER information.

Based on the fourth aspect, the session management network element can determine to establish a dual N3/N9 redundancy transmission path according to the PER requirement and PER information, or establish a dual redundancy session, that is, can dynamically trigger the establishment of redundancy transmission according to the PER requirement, and ensure the realization of the PER requirement while performing redundancy transmission.

In one possible design, the session management network element receives PER requirements from the application function network element via a session management policy control network element.

Based on the possible design, a feasibility scheme is provided for the session management network element to acquire PER requirements.

In one possible design, the session management network element further receives application information from the application function network element through the session management policy control network element; wherein the application information is used to indicate that the application supports redundant transmission.

In a possible design, the session management network element further receives, through the session management policy control network element, indication information from the application function network element for indicating support for dynamically establishing the dual redundancy session.

In one possible design, a session management network element subscribes PER information to a target network element according to PER requirements; the target network element comprises an access network element and a user plane network element; the session management network element receives PER information from the target network element.

Based on the possible design, the PER information can be PER state of service or PER capability information of network element, so that the session management network element can reasonably establish a redundant transmission path according to PER requirement and PER information.

In one possible design, the session management network element sends the third indication information to the session management policy control network element; the third indication information is used for indicating to establish a dual-redundancy session; or the session management network element sends fourth indication information to the application function network element; the fourth indication information is used for indicating the establishment of the dual-redundancy session.

Based on the possible design, the session management network element may instruct to establish the dual-redundancy session through the third indication information, or may instruct to establish the dual-redundancy session through the fourth indication information, without limitation.

In a fifth aspect, an embodiment of the present application provides a communication device, where the communication device may implement a function performed by a session management network element in the fourth aspect or a possible design of the fourth aspect, where the function may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for acquiring the PER requirement and PER information of the error rate; the processing module is used for determining to establish a double-redundancy session according to PER requirements and PER information; or the processing module is used for determining to establish a double N3/N9 redundant transmission path according to the PER requirement and PER information.

In a possible design, the transceiver module is further configured to control the network element to receive the PER requirement from the application function network element through the session management policy.

In one possible design, the transceiver module is further configured to control the network element to receive application information from the application function network element through a session management policy; wherein the application information is used to indicate that the application supports redundant transmission.

In a possible design, the transceiver module is further configured to receive, by the session management policy control network element, indication information from the application function network element for indicating support for dynamically establishing the dual redundancy session.

In one possible design, the transceiver module is further configured to subscribe the PER information to the target network element according to the PER requirement; the target network element comprises an access network element and a user plane network element; and the receiving and transmitting module is also used for receiving PER information from the target network element.

In one possible design, the transceiver module is further configured to send third indication information to the session management policy control network element; the third indication information is used for indicating to establish a dual-redundancy session; or, the transceiver module is further configured to send fourth indication information to the application function network element; the fourth indication information is used for indicating the establishment of the dual-redundancy session.

It should be noted that, in a specific implementation manner of the communication apparatus in the fifth aspect, reference may be made to the redundant transmission request method provided in the fourth aspect or any one of the possible designs of the fourth aspect, to a behavioral function of a session management network element.

In a sixth aspect, an embodiment of the present application provides a communication device, which may be a chip or a system on chip in a session management network element. The communication device may implement the functions performed by the session management network element in the aspects described above or in each possible design, which may be implemented by hardware. In one possible design, the communication device may include: a transceiver and a processor. The transceiver and processor may be used to support the communication device to implement the functionality involved in the fourth aspect or any one of the possible designs of the fourth aspect. For example: the transceiver may be configured to obtain a bit error rate PER requirement and PER information; the processor may be configured to determine to establish a dual redundancy session based on the PER requirements and PER information; alternatively, the processor may be configured to determine to establish a dual N3/N9 redundant transmission path based on the PER requirements and PER information. In yet another possible design, the communication device may further include a memory for holding computer-executable instructions and data necessary for the communication device. When the communication device is operating, the transceiver and processor execute the computer-executable instructions stored in the memory to cause the communication device to perform the redundant transmission request method as described in the fourth aspect or any one of the possible designs of the fourth aspect.

In this embodiment, the specific implementation manner of the communication apparatus in the sixth aspect may refer to the behavior function of the session management network element in the redundant transmission request method provided in the fourth aspect or any one of possible designs of the fourth aspect.

In a seventh aspect, an embodiment of the present application provides a redundant transmission request method, which may include: the session management policy control network element receives third indication information from the session management network element; the third indication information is used for indicating to establish a dual-redundancy session; the session management policy control network element sends a fourth request to the access and mobile control policy control network element; the fourth request is used for requesting to update a routing policy URSP rule of the terminal equipment; or the session management policy control network element stores a fifth request to the network storage network element; wherein the fifth request is for the network storage element to instruct the access and mobility control policy control element to update the urs rules.

Based on the seventh aspect, the session management policy control network element may trigger the access and mobile control policy control network element to update the urs rules according to the third indication information, so that the terminal device may establish a redundant transmission path according to the updated urs rules, thereby dynamically triggering the establishment of the redundant transmission according to the PER requirements, and ensuring the implementation of the PER requirements while performing the redundant transmission.

In one possible design, the session management policy control network element determines access and mobility control policy control network elements by binding support function network elements; the session management policy control network element sends a fourth request to the access and mobility control policy control network element.

In one possible design, the fifth request includes one or more of the following: routing parameters, application function network element information, application traffic descriptors.

In one possible design, the session management policy control element receives one or more of the following information from the application function element: routing parameters, application function network element information, application traffic descriptors; the session management policy control network element sends a fifth request to the network storage network element.

In an eighth aspect, an embodiment of the present application provides a communication device, where the communication device may implement a function executed by a session management policy control network element in the seventh aspect or a possible design of the seventh aspect, where the function may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for receiving third indication information from the session management network element; the third indication information is used for indicating to establish a dual-redundancy session; the receiving and transmitting module is further used for sending a fourth request to the access and mobile control strategy control network element; the fourth request is used for requesting to update a routing policy URSP rule of the terminal equipment; or, the transceiver module is further configured to store the fifth request to the network storage network element; wherein the fifth request is for the network storage element to instruct the access and mobility control policy control element to update the urs rules.

In one possible design, the processing module is configured to determine the access and mobile control policy control network element by binding the support function network element; and the transceiver module is also used for sending a fourth request to the access and mobile control strategy control network element.

In a possible design, the transceiver module is further configured to receive one or more of the following information from the application function network element: routing parameters, application function network element information, application traffic descriptors; and the transceiver module is also used for sending a fifth request to the network storage network element.

It should be noted that, in a specific implementation manner of the communication apparatus in the eighth aspect, reference may be made to the behavior function of the session management network element in the redundant transmission request method provided in the seventh aspect or any one of the possible designs of the seventh aspect.

In a ninth aspect, an embodiment of the present application provides a communication device, where the communication device may be a session management policy control network element or a chip or a system on chip in a session management policy control network element. The communication device may implement the above aspects or the functions performed by the session management policy control network element in each possible design, where the functions may be implemented by hardware. In one possible design, the communication device may include: a transceiver and a processor. The transceiver and processor may be adapted to support the communication device to carry out the functions involved in the seventh aspect or any one of the possible designs of the seventh aspect described above. For example: the transceiver may be configured to receive third indication information from the session management network element; the third indication information is used for indicating to establish a dual-redundancy session; the transceiver is further configured to send a fourth request to the access and mobility control policy control network element; the fourth request is used for requesting to update a routing policy URSP rule of the terminal equipment; or, the transceiver is further configured to store the fifth request to the network storage element; wherein the fifth request is for the network storage element to instruct the access and mobility control policy control element to update the urs rules. In yet another possible design, the communication device may further include a memory for holding computer-executable instructions and data necessary for the communication device. When the communication device is operating, the transceiver and processor execute the computer-executable instructions stored in the memory to cause the communication device to perform the redundant transmission request method as described in the seventh aspect or any one of the possible designs of the seventh aspect.

In this embodiment, the communication device in the ninth aspect may refer to the session management policy in the redundant transmission request method provided in the seventh aspect or any one of the possible designs of the seventh aspect to control a behavior function of the network element.

In a tenth aspect, an embodiment of the present application provides a redundant transmission request method, which may include: the application function network element receives first indication information from the time delay sensitive communication and time synchronization network element or receives fourth indication information from the session management network element; the first indication information is used for indicating the establishment of the double-redundancy session, and the fourth indication information is used for indicating the establishment of the double-redundancy session; the application function network element sends a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of the terminal device routing policy urs p rule.

Based on the tenth aspect, the application function network element can trigger the access and mobile control strategy to control the network element to update the URSP rule according to the first indication information or the fourth indication information, so that the terminal equipment can conveniently establish a redundant transmission path according to the updated URSP rule, and accordingly, the establishment of the redundant transmission can be dynamically triggered according to the PER requirement, and the realization of the PER requirement is ensured while the redundant transmission is carried out.

In one possible design, an application function network element sends PER information of service requirements to a delay sensitive communication and time synchronization network element; or, the application function network element sends PER information of the service requirement to the session management policy control network element.

In one possible design, the application function network element sends one or more of the following information to the delay sensitive communication and time synchronization network element or session management policy control network element: routing parameters, application function network element information, application traffic descriptors.

In an eleventh aspect, an embodiment of the present application provides a communication device, where the communication device may implement a function performed by an application function network element in the tenth aspect or a possible design of the tenth aspect, where the function may be implemented by executing corresponding software by using hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for receiving first indication information from the time delay sensitive communication and time synchronization network element or receiving fourth indication information from the session management network element; the first indication information is used for indicating the establishment of the double-redundancy session, and the fourth indication information is used for indicating the establishment of the double-redundancy session; the receiving and transmitting module is further used for sending a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of the terminal device routing policy urs p rule.

In one possible design, the transceiver module is further configured to send PER information of the service requirement to the delay sensitive communication and time synchronization network element; or the transceiver module is further used for sending PER information of the service requirement to the session management policy control network element.

In a possible design, the transceiver module is further configured to send one or more of the following information to the delay sensitive communication and time synchronization network element or the session management policy control network element: routing parameters, application function network element information, application traffic descriptors.

It should be noted that, in a specific implementation manner of the communication apparatus in the eleventh aspect, reference may be made to the behavior function of the application function network element in the redundant transmission request method provided in the tenth aspect or any one of possible designs of the tenth aspect.

In a twelfth aspect, an embodiment of the present application provides a communication device, which may be an application function network element or a chip or a system on chip in an application function network element. The communication device may implement the above aspects or the functions performed by the application function network element in each possible design, which may be implemented by hardware. In one possible design, the communication device may include: a transceiver and a processor. The transceiver and processor may be adapted to support the communication device to carry out the functions referred to in the tenth aspect or any one of the possible designs of the tenth aspect described above. For example: the transceiver may be configured to receive first indication information from a delay sensitive communication and time synchronization network element or receive fourth indication information from a session management network element; the first indication information is used for indicating the establishment of the double-redundancy session, and the fourth indication information is used for indicating the establishment of the double-redundancy session; the transceiver is further configured to send a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of the terminal device routing policy urs p rule. In yet another possible design, the communication device may further include a memory for holding computer-executable instructions and data for the communication device. When the communication device is operating, the transceiver and processor execute the computer-executable instructions stored in the memory to cause the communication device to perform the redundant transmission request method as described in the tenth aspect or any one of the possible designs of the tenth aspect.

In this embodiment, the communication device in the twelfth aspect may refer to the redundant transmission request method provided in the tenth aspect or any one of the possible designs of the tenth aspect, where the behavioral functions of the functional network element are applied.

In a thirteenth aspect, an embodiment of the present application provides a redundant transmission request method, including: the time delay sensitive communication and time synchronization network element obtains the error rate PER requirement and PER information; the time delay sensitive communication and time synchronization network element determines to release the double redundant session according to PER requirements and PER information; or the time delay sensitive communication and time synchronization network element determines to release the double N3/N9 redundant transmission path according to the PER requirement and PER information.

Based on the first aspect, the delay sensitive communication and time synchronization network element can determine to release the double N3/N9 redundancy transmission path according to PER requirements and PER information, or release the double redundancy session, namely can dynamically trigger the release of redundancy transmission according to PER requirements, and reduces communication overhead on the basis of realizing PER requirements.

In one possible design, the delay sensitive communication and time synchronization network element also receives routing parameters and application information from the application function network element; the application information is used for indicating that the application supports releasing the double redundant session.

Based on the possible design, the PER information can be PER state of service or PER capability information of network element, so that the time delay sensitive communication and time synchronization network element can reasonably release redundant transmission paths according to PER requirement and PER information.

Based on the three possible designs described above, the routing parameters may be single routing parameters.

Based on this possible design, the delay sensitive communication and time synchronization network element may also send a urs update notification to the application function network element to cause the application function network element to trigger the terminal device to establish a single session.

In one possible design, the delay-sensitive communication and time synchronization network element sends fifth indication information to the application function network element; wherein the fifth indication information is used for indicating that the single session is established.

Based on the possible design, the delay sensitive communication and time synchronization network element may further send fifth indication information to the application function network element, so that the application function network element triggers the access and mobile control policy to control the network element to update the urs rules, and further triggers the terminal device to establish a single session.

In one possible design, the delay sensitive communication and time synchronization network element sends a sixth indication to the session management network element; the sixth indication information is used for indicating that a single N3/N9 redundant transmission path is established.

In a fourteenth aspect, an embodiment of the present application provides a communication device, where the communication device may implement the functions performed by the delay sensitive communication and time synchronization network element in the foregoing thirteenth aspect or the possible designs of the thirteenth aspect, where the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for acquiring the PER requirement and PER information of the error rate; the processing module is used for determining to release the double-redundancy session according to the PER requirement and PER information; or, the method is used for determining to release the double N3/N9 redundant transmission path according to the PER requirement and PER information.

In a fifteenth aspect, an embodiment of the present application provides a redundant transmission request method, including: the session management network element obtains the error rate PER requirement and PER information; the session management network element determines to release the dual-redundancy session according to PER requirements and PER information; or the session management network element determines to release the double N3/N9 redundant transmission path according to the PER requirement and PER information.

Based on the fifteenth aspect, the session management network element can determine to release the dual N3/N9 redundancy transmission path according to the PER requirement and the PER information, or release the dual redundancy session, that is, can dynamically trigger the release of the redundancy transmission according to the PER requirement, and reduce the communication overhead on the basis of ensuring the PER requirement.

In one possible design, the session management network element further receives application information from the application function network element through the session management policy control network element; the application information is used for indicating that the application supports releasing the double redundant session.

In one possible design, the session management network element sends seventh indication information to the session management policy control network element; the seventh indication information is used for indicating to release the dual-redundancy session; or the session management network element sends eighth indication information to the application function network element; wherein the eighth indication information is used for indicating to release the dual redundancy session.

Based on the possible design, the session management network element may instruct to release the dual-redundancy session through the seventh indication information, or may instruct to release the dual-redundancy session through the eighth indication information, without limitation.

In a sixteenth aspect, an embodiment of the present application provides a communication device, where the communication device may implement the functions performed by the session management network element in the fourth aspect or the possible designs of the fourth aspect, where the functions may be implemented by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for acquiring the PER requirement and PER information of the error rate; the processing module is used for determining to release the double-redundancy session according to the PER requirement and PER information; or the processing module is used for determining to release the double N3/N9 redundant transmission paths according to the PER requirement and PER information.

In a seventeenth aspect, an embodiment of the present application provides a redundant transmission request method, which may include: the session management policy control network element receives seventh indication information from the session management network element; the seventh indication information is used for indicating to release the dual-redundancy session; the session management policy control network element sends a fourth request to the access and mobile control policy control network element; the fourth request is used for requesting to update a routing policy URSP rule of the terminal equipment; or the session management policy control network element stores a fifth request to the network storage network element; wherein the fifth request is for the network storage element to instruct the access and mobility control policy control element to update the urs rules.

Based on the seventeenth aspect, the session management policy control network element may trigger the access and mobile control policy control network element to update the urs p rule according to the seventh indication information, so that the terminal device may establish a single transmission path according to the updated urs p rule, thereby dynamically triggering release of redundant transmission according to the PER requirement, and reducing communication overhead on the basis of ensuring the PER requirement.

Based on the two possible designs described above, the routing parameters may be single routing parameters.

In an eighteenth aspect, an embodiment of the present application provides a communication device, where the communication device may implement a function performed by the session management policy control network element in the seventeenth aspect or a possible design of the seventeenth aspect, where the function may be implemented by executing corresponding software by using hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for receiving seventh indication information from the session management network element; the seventh indication information is used for indicating to release the dual-redundancy session; the receiving and transmitting module is further used for sending a fourth request to the access and mobile control strategy control network element; the fourth request is used for requesting to update a routing policy URSP rule of the terminal equipment; or, the transceiver module is further configured to store the fifth request to the network storage network element; wherein the fifth request is for the network storage element to instruct the access and mobility control policy control element to update the urs rules.

In a nineteenth aspect, an embodiment of the present application provides a redundant transmission request method, which may include: the application function network element receives fifth indication information from the time delay sensitive communication and time synchronization network element, or receives eighth indication information from the session management network element; the fifth indication information is used for indicating to release the double-redundancy session, and the eighth indication information is used for indicating to release the double-redundancy session; the application function network element sends a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of the terminal device routing policy urs p rule.

Based on the nineteenth aspect, the application functional network element may trigger the access and mobile control policy to control the network element to update the urs rules according to the fifth indication information or the eighth indication information, so that the terminal device may establish a single transmission path according to the updated urs rules, thereby dynamically triggering release of redundant transmission according to PER requirements, and reducing communication overhead while ensuring PER requirements.

Wherein the routing parameter may be a single routing parameter.

In a twentieth aspect, an embodiment of the present application provides a communication device, where the communication device may implement a function performed by an application function network element in the nineteenth aspect or a possible design of the nineteenth aspect, where the function may be implemented by executing corresponding software by using hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a transceiver module and a processing module. The receiving and transmitting module is used for receiving fifth indication information from the time delay sensitive communication and time synchronization network element or receiving eighth indication information from the session management network element; the fifth indication information is used for indicating to release the double-redundancy session, and the eighth indication information is used for indicating to release the double-redundancy session; the receiving and transmitting module is further used for sending a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of the terminal device routing policy urs p rule.

In a twenty-first aspect, a communication device is provided, the communication device comprising one or more processors; one or more processors configured to execute a computer program or instructions that, when executed by the one or more processors, cause the communication device to perform the redundant transmission request method as described in the first aspect or any of the possible designs of the first aspect, or to perform the redundant transmission request method as described in the fourth aspect or any of the possible designs of the seventh aspect, or to perform the redundant transmission request method as described in the tenth aspect or any of the possible designs of the tenth aspect, or to perform the redundant transmission request method as described in the thirteenth aspect or any of the possible designs of the thirteenth aspect, or to perform the redundant transmission request method as described in the seventeenth aspect or any of the possible designs of the seventeenth aspect, or to perform the redundant transmission request method as described in the nineteenth aspect or any of the possible designs of the nineteenth aspect.

In one possible design, the communication device further includes one or more memories coupled to the one or more processors, the one or more memories for storing the computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In embodiments of the present application, the processor and the memory may also be integrated in one device, i.e., the processor and the memory may also be integrated. In a possible implementation, the communication device further comprises a transceiver for receiving information and/or transmitting information.

In one possible design, the communication device further includes one or more communication interfaces coupled to the one or more processors, the one or more communication interfaces configured to communicate with other modules outside of the communication device.

In a twenty-second aspect, a communication device is provided, the communication device comprising an input-output interface and logic circuitry; an input-output interface for inputting and/or outputting information; the logic circuit is configured to perform the redundant transmission request method according to the first aspect or any of the possible designs of the first aspect, or to perform the redundant transmission request method according to the fourth aspect or any of the possible designs of the seventh aspect, or to perform the redundant transmission request method according to the tenth aspect or any of the possible designs of the tenth aspect, or to perform the redundant transmission request method according to the thirteenth aspect or any of the possible designs of the thirteenth aspect, or to perform the redundant transmission request method according to the fifteenth aspect or any of the possible designs of the seventeenth aspect, or to perform the redundant transmission request method according to any of the nineteenth aspect, to process and/or generate information according to the information.

In a twenty-third aspect, there is provided a computer-readable storage medium storing computer instructions or a program that, when executed on a computer, cause a redundant transmission request method as described in the first aspect or any of the possible designs of the first aspect, or a redundant transmission request method as described in the fourth aspect or any of the possible designs of the seventeenth aspect, or a redundant transmission request method as described in the seventh aspect or any of the possible designs of the seventh aspect, or a redundant transmission request method as described in the tenth aspect or any of the possible designs of the thirteenth aspect, or a redundant transmission request method as described in the fifteenth aspect or any of the possible designs of the fifteenth aspect, or a redundant transmission request method as described in the seventeenth aspect, or a redundant transmission request method as described in the nineteenth aspect.

In a twenty-fourth aspect, there is provided a computer program product comprising computer instructions which, when run on a computer, cause a redundant transmission request method as described in the first aspect or any of the possible designs of the first aspect, or a redundant transmission request method as described in the fourth aspect or any of the possible designs of the seventh aspect, or a redundant transmission request method as described in the tenth aspect or any of the possible designs of the tenth aspect, or a redundant transmission request method as described in the thirteenth aspect or any of the possible designs of the thirteenth aspect, or a redundant transmission request method as described in the fifteenth aspect or any of the possible designs of the seventeenth aspect, or a redundant transmission request method as described in the seventeenth aspect or any of the possible designs of the nineteenth aspect, or a redundant transmission request as described in the nineteenth aspect.

In a twenty-fifth aspect, an embodiment of the present application provides a computer program, which when run on a computer, causes the redundant transmission request method as described in the first aspect or any of the possible designs of the first aspect to be performed, or the redundant transmission request method as described in the fourth aspect or any of the possible designs of the fourth aspect to be performed, or the redundant transmission request method as described in the seventh aspect or any of the possible designs of the seventh aspect to be performed, or the redundant transmission request method as described in the thirteenth aspect or any of the possible designs of the thirteenth aspect to be performed, or the redundant transmission request method as described in the fifteenth aspect or any of the possible designs of the seventeenth aspect to be performed, or the redundant transmission request method as described in the seventeenth aspect or any of the possible designs of the nineteenth aspect to be performed.

The technical effect of any one of the design manners of the twenty-first aspect to the twenty-fifth aspect may be referred to the technical effect of any one of the possible designs of the first aspect, or the technical effect of any one of the possible designs of the fourth aspect, or the technical effect of any one of the possible designs of the seventh aspect, or the technical effect of any one of the possible designs of the tenth aspect.

A twenty-sixth aspect provides a communication system including the communication apparatus according to any one of the second to third aspects, the communication apparatus according to any one of the fifth to sixth aspects, the communication apparatus according to any one of the eighth to ninth aspects and the communication apparatus according to any one of the eleventh to twelfth aspects, or the communication apparatus according to the fourteenth aspect, the communication apparatus according to the sixteenth aspect, the communication apparatus according to the eighteenth aspect and the communication apparatus according to the twentieth aspect.

Drawings

Fig. 1 is a schematic diagram of an end-to-end redundancy transmission architecture scenario provided in an embodiment of the present application;

Fig. 2 is a flowchart of a method for establishing a dual-redundancy session according to an embodiment of the present application;

fig. 3 is a flowchart of a method for modifying a urs rule by using a functional network element according to an embodiment of the present application;

fig. 4 is a schematic diagram of redundant transmission through a dual N3 tunnel according to an embodiment of the present application;

fig. 5 is a schematic diagram of redundant transmission through dual N3 and N9 tunnels according to an embodiment of the present application;

fig. 6 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 7 is a schematic diagram of a 5G communication system according to an embodiment of the present application;

fig. 8 is a schematic diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic diagram of a redundant transmission request method according to an embodiment of the present application;

fig. 10 is a schematic diagram of a redundant transmission request method according to an embodiment of the present application;

fig. 11 is a schematic diagram of a redundant transmission request method according to an embodiment of the present application;

fig. 12 is a schematic diagram of a redundant transmission request method according to an embodiment of the present application;

fig. 13 is a schematic diagram of a redundant transmission request method according to an embodiment of the present application;

fig. 14 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

Fig. 15 is a flowchart for obtaining PER information according to an embodiment of the present application;

fig. 16 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

FIG. 17a is a flowchart for obtaining PER information according to an embodiment of the present application;

fig. 17b is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 17c is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 18 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 19 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 20 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 21 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 22 is a flowchart of a redundant transmission request method according to an embodiment of the present application;

fig. 23 is a block diagram of a time delay sensitive communication and time synchronization network element according to an embodiment of the present application;

fig. 24 is a component structure diagram of a session management network element according to an embodiment of the present application;

fig. 25 is a diagram illustrating a structure of a session management policy control network element according to an embodiment of the present application;

Fig. 26 is a component structure diagram of an application function network element according to an embodiment of the present application.

Detailed Description

Before describing embodiments of the present application, technical terms related to the embodiments of the present application will be described.

Protocol data unit (protocol data unit, PDU) session: the terminal device may access the data network by establishing a PDU session from the terminal device to the access network element to the user plane element to the Data Network (DN).

The data transmission can be carried out between the terminal equipment and the access network element through an air interface, the data transmission can be carried out between the access network element and the user plane element through an N3 tunnel, and the data transmission can be carried out between the user plane element and the DN through an N6 tunnel.

End-to-end redundant transmission: i.e. the terminal device can communicate with the DN by sending two redundant data packets by establishing two inter-related PDU sessions. Wherein, the two related PDU sessions can also be described as two related sessions, a dual redundancy session, etc., without limitation.

In an exemplary embodiment, as shown in fig. 1, in the end-to-end redundancy transmission architecture scenario, the terminal device may use two different user plane network elements (such as the user plane network element 1 and the user plane network element 2) to perform data transmission of each session, or may use a dual connectivity (dual connectivity, DC) technology to connect with two access network elements (such as a main access network element and a secondary access network element) at the same time, and two interrelated sessions may perform data transmission through the two access network elements respectively. In the user plane, the end-to-end redundancy transmission of the terminal equipment, the access network element and the user plane element-DN can be realized, and each section has independent data transmission channels for an air interface, an N3 tunnel and an N6 tunnel, so that the reliability of data transmission can be ensured. In the control plane, two associated sessions may be managed by using the same session management network element, or may be managed by using two different session management network elements (e.g. session management network element 1 and session management network element 2), which is not limited.

Based on the description of the peer-to-peer redundancy transmission architecture scenario, the following method shown in fig. 2 may be used to establish a dual redundancy session, and specifically, the method may include:

step 201, the terminal device determines to establish a dual redundancy session.

The terminal device may determine to establish the dual-redundancy session according to a terminal device routing policy (UE route selection policy, urs) rule, or the terminal device may determine to establish the dual-redundancy session according to an internal implementation, without limitation.

Wherein the urs rules may include one or more of the following: the Pair ID, redundant sequence number (redundancy sequence number, RSN), two urs rules may use different data network names (data network name, DNN) and single network slice selection assistance information (single network slice selection assistance information, S-nsai).

Step 202, the terminal device sends two paths of session establishment requests to the session management network element.

Wherein the session establishment request may include one or more of: the Pair ID, RSN are used to identify two mutually redundant sessions, and the session establishment request may be used to request establishment of a dual redundancy session.

When the session establishment request includes a Pair ID and an RSN, the Pair ID may be used to indicate that two sessions corresponding to the Pair ID belong to the same Pair of sessions, i.e., a dual redundancy session; RSN may be used to distinguish between two sessions. When the session establishment request includes an RSN, excluding the Pair ID, the RSN may be used to indicate two sessions belonging to the same Pair of sessions.

When the terminal device determines to establish the dual redundancy session, the terminal device may send a session establishment request including the Pair ID and/or RSN to the session management network element to request to establish the dual redundancy session. When the terminal device determines that the dual redundancy session is not established, but the session is required to be established for data transmission, the terminal device may send a normal session establishment request to the session management network element to request establishment of the normal session.

Optionally, the session establishment request further comprises DNN and S-NSSAI.

Wherein, when the session establishment request includes a Pair ID and/or RSN, the two sessions may correspond to the same DNN and S-nsai. When the session establishment request does not include a Pair ID and/or RSN, the two sessions may correspond to different DNNs and S-NSSAIs.

Step 203, the session management network element sends a session management policy request to the policy control network element.

The session management policy request may be used to request information such as session related quality of service (quality of service, qoS) requirements, qoS configuration information, etc.

For example, the session management network element may send a session management policy request to the policy control network element according to the DNN and the S-nsai.

Wherein when the session establishment request includes a Pair ID and/or an RSN, the session management network element may send a session management policy request to the policy control network element using the same DNN and S-nsai. When the session establishment request does not include a Pair ID and/or RSN, the session management network element may send a session management policy request to the policy control network element using different DNNs and S-nsais.

Step 204, the policy control network element sends the session management policy to the session management network element.

When the session establishment request includes a Pair ID and/or RSN (i.e., the terminal device requests to establish the dual redundancy session), the policy control network element may send the session management policy to the session management network element, and does not include other indication information.

When the session establishment request does not include the Pair ID and the RSN (i.e. the terminal device does not request to establish the dual-redundancy session), the policy control network element may determine that the session is a redundancy session according to subscription information or local configuration information of the terminal device, where the policy control network element may include a redundancy session identifier (redundancy PDU session indicator) in a session management policy sent to the session management network element, so as to indicate that the session is a redundancy session, and optionally may also carry the Pair ID and/or the RSN in the session management policy.

Optionally, the policy control network element carries the session management policy in a session management policy response and sends the session management policy response to the session management network element.

Step 205, the session management network element sends an N4 session request to the user plane network element.

Step 206, the user plane network element sends an N4 session response to the session management network element.

Wherein the N4 session request may be used to request establishment of an N4 session.

When the terminal equipment requests to establish the dual-redundancy session, the session management network element may send N4 session requests to the two user plane network elements respectively, and the two user plane network elements may send N4 session responses to the session management network element according to the received N4 session requests, so as to complete N4 session establishment, thereby configuring one user plane network element for each of the two sessions.

Step 207, the session management network element informs the access network element by adding the Pair ID and RSN in the session management context container.

Wherein when the session establishment request includes the Pair ID and the RSN, the session management network element may determine the Pair ID and the RSN according to the session establishment request sent by the terminal device. When the session management policy includes a Pair ID and an RSN, the session management network element may determine the Pair ID and the RSN according to the session management policy transmitted by the policy control network element. When neither the session establishment request nor the session management policy includes the Pair ID and the RSN, the session management network element may allocate the Pair ID and the RSN by itself, without limitation.

Step 208, the access network element establishes dual connection for the terminal equipment according to the allocated Pair ID and RSN.

The access network element can transmit the data of the two sessions through the main access network element and the auxiliary access network element respectively.

The main access network element may be an access network element notified by the session management network element, the main access network element may be responsible for maintaining a context of the mobility management network element, and the terminal device may reside on the main access network element. The primary access network element may also determine which data is transmitted on the secondary access network element, and the secondary access network element may perform data transmission according to the configuration of the primary access network element.

Based on the above description of fig. 2, it can be known that the triggering condition for dual redundancy session establishment may be any of the following: the terminal equipment determines to establish the double redundant session according to the URSP rule, the terminal equipment determines to establish the double redundant session according to the internal implementation, and the policy control network element determines to establish the double redundant session according to the subscription information or the local configuration information of the terminal equipment.

When the terminal device determines to establish the dual-redundancy session according to the urs rule, or the policy control network element determines to establish the dual-redundancy session according to the subscription information or the local configuration information of the terminal device, the urs rule of the terminal device needs to be modified by the application function network element in a manner of modifying the urs rule, so that the terminal device can initiate two paths of session establishment requests (i.e. requests to establish the dual-redundancy session) according to the modified urs rule.

For example, as shown in fig. 3, the manner in which the application function network element modifies the urs rules may include:

step 301, the terminal device performs a registration procedure.

During the registration process of the terminal device, the session management network element can perform policy binding to the access and mobile control policy control network element, and the access and mobile control policy control network element can subscribe the notification related to the terminal device policy to the network storage network element.

Step 302, the application function network element generates an application function request.

Wherein the application function network element may generate an application function request affecting the terminal device policy.

The application function request may include, for example, a specified terminal device (e.g., identification information of the terminal device, external group identification information, etc.), and may further include an application traffic descriptor (application traffic descriptor) for identifying the traffic data flow, and a routing parameter (route selection parameters) for configuring the urs rule.

The identification information of the terminal equipment can be an Identity (ID) of the terminal equipment, a general public user identity (generic public subscription identifier, GPSI) and the like; the routing parameters may include, without limitation, DNN, S-NSSAI, priority, etc.

Step 303, the application function network element sends the application function request to the network presentation network element.

Wherein the application function network element may send the application function request to the network presentation network element in the form of a service parameter creation/update/delete request (service parameter-create/update/delete request).

Step 304, the network presentation network element stores the application function request to the network element storage network element.

Wherein the network presentation network element may store the application function request to the network storage network element in the form of storage/update/removal information (storage/update/removing the information).

Step 305, the network presentation network element sends a service parameter creation/update/deletion response to the application function network element.

The service parameter creation/update/deletion response may be service parameter-create/update/delete response.

Step 306, the network storage network element initiates notification to the access and mobile control policy control network element subscribed to the notification.

The network storage network element can determine which access and mobile control strategy control network element to initiate notification according to the identification information of the terminal equipment, and send the content of the application function request to the access and mobile control strategy control network element corresponding to the terminal equipment.

Step 307, the access and mobile control policy control network element generates corresponding urs rules according to the application function request, and sends the urs rules to the terminal device through the mobility management network element.

The access and mobile control policy control network element can generate the URSP rule according to the information such as the routing parameter in the application function network element.

Optionally, if the application function network element subscribes to the urs p update notification while sending the application function request, the access and mobility control policy control network element may further execute steps 308 and 309 described below after completing urs p rule update.

Step 308, the access and mobile control policy control network element notifies the network element of the urs p update condition.

Step 309, the network presentation network element notifies the application function network element of the urs p update condition.

Based on the description of fig. 1 to 3, the terminal device may perform redundancy transmission in a manner of establishing a dual redundancy session, as shown in fig. 4 below, or may perform redundancy transmission through a dual N3 tunnel, as shown in fig. 5 below, or may perform redundancy transmission through dual N3 and N9 tunnels. Wherein, the redundant transmission through the double N3 tunnel or the redundant transmission through the double N3 and N9 tunnels may be collectively referred to as the redundant transmission through the double N3/N9 tunnels.

As shown in fig. 4, when the session management network element establishes a session for the terminal device, two N3 tunnels may be configured for the session, that is, two N3 tunnels (N3 tunnels 1 and N3 tunnels 2) exist between the access network element and the user plane network element, and when data transmission is performed, the access network element may send two redundant data packets to the user plane network element through the two N3 tunnels, and the user plane network element sends the two redundant data packets to the DN through the N6 tunnel.

As shown in fig. 5, when the session management network element establishes a session for the terminal device, two intermediate user plane network elements (intermediate user plane network element 1 and intermediate user plane network element 2), two N3 tunnels (N3 tunnels 1 and N3 tunnels 2), and two N9 tunnels (N9 tunnels 1 and N9 tunnels 2) may be configured for the session, and the access network element may communicate with the two intermediate user plane network elements through the two N3 tunnels, and the two intermediate user plane network elements may communicate with the user plane network elements through the two N9 tunnels, respectively. When data transmission is performed, the access network element can respectively send two redundant data packets to the two middle user plane network elements through two N3 tunnels, the two middle user plane network elements respectively send two redundant data packets to the user plane network elements through two N9 tunnels, and the user plane network elements send the two redundant data packets to the DN through the N6 tunnels.

When the dual N3/N9 tunnel is established for redundant transmission, the session management network element can directly configure the access network element and the user plane network element, the terminal equipment can not perceive the configuration transmission process, and the reliability of the N3 transmission link can be increased.

Based on the redundancy transmission process shown in fig. 1 to 5, both the process of establishing or releasing the dual redundancy session and the process of establishing or releasing the dual N3/N9 tunnel only support the pre-configuration, and cannot dynamically trigger the establishment or release of the redundancy transmission in the data transmission process. Therefore, how to dynamically trigger the establishment or release of redundant transmission is a technical problem to be solved.

In order to solve the technical problem, the embodiment of the application provides a redundant transmission request method, in which time delay sensitive communication and time synchronization network elements can acquire the requirements of false alarm rate (packet error rate, PER) and PER information; the time delay sensitive communication and time synchronization network element determines to establish a double redundancy session according to PER requirements and PER information; or the time delay sensitive communication and time synchronization network element determines to establish a double N3/N9 redundant transmission path according to PER requirements and PER information.

In the embodiment of the application, the time delay sensitive communication and time synchronization network element can determine to establish a double N3/N9 redundancy transmission path according to PER requirements and PER information, or establish a double redundancy session, namely can dynamically trigger the establishment of redundancy transmission according to PER requirements, and can ensure the realization of PER requirements while carrying out redundancy transmission.

The following describes embodiments of the present application in detail with reference to the drawings.

The redundancy transmission request method provided in the embodiment of the present application may be used in any communication system, which may be a third generation partnership project (third generation partnership project,3 GPP) communication system, for example, a long term evolution (long term evolution, LTE) system, a fifth generation (5G) mobile communication system, a New Radio (NR) system, an NR V2X system, and other next generation communication systems, or may be a non-3 GPP communication system, without limitation.

The redundancy transmission request method provided by the embodiment of the application can be applied to various communication scenes, for example, can be applied to one or more of the following communication scenes: enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-reliable low latency communications (ultra reliable low latency communication, URLLC), machine type communications (machine type communication, MTC), large-scale machine type communications (massive machine type communications, mctc), device-to-device (D2D), vehicle-to-vehicle (vehicle to everything, V2X), vehicle-to-vehicle (vehicle to vehicle, V2V), and internet of things (internet of things, ioT), among others. A communication system provided by an embodiment of the present application will be described below by taking fig. 6 as an example.

Fig. 6 is a schematic diagram of a communication system provided in an embodiment of the present application, where, as shown in fig. 6, the communication system may include at least one terminal device, an access network element, a delay sensitive communication and time synchronization network element, a mobility management network element, a session management network element, a policy control network element, a user plane network element, an application function network element, a network storage network element, and a DN.

In fig. 6, the terminal device may be located within a coverage area of a cell of the access network element. The terminal equipment can communicate with the access network element through an Uplink (UL), and in the UL direction, the terminal equipment sends data to the access network element, the access network element forwards the received data to the core network element, the core network element processes the data, and the processed data is sent to the application server through an N6 interface; in the DL direction, the application server sends downlink data to the core network element, the core network element processes the data and sends the processed data to the access network element through the N3 interface, and the access network element processes the data and sends the processed data to the terminal equipment through the air interface. Such as: the terminal equipment sends uplink data to an access network element through an uplink physical layer shared channel (physical sidelink share channel, PUSCH) in the UL direction, the access network element forwards the received uplink data to a core network element, the core network element processes the uplink data, and the processed uplink data is sent to an application server through an N6 interface; the access network element for forwarding the uplink data from the terminal device to the core network element and the access network element for forwarding the downlink data from the core network element to the terminal device may be the same access network element or may be different access network elements.

The terminal device may also communicate with the core network element through a specific interface, such as: the terminal device may communicate with a mobility management network element of the core network elements via an N1 interface.

After the terminal equipment is accessed to the network, a PDU session can be established, an external DN is accessed through the PDU session, interaction is carried out with an application server deployed in the DN, as shown in figure 6, according to different DNs accessed by users, the network can select a user plane network element accessed to the DN as an anchor point of the PDU session, namely a protocol data unit anchor point (PDU session anchor, PSA), the application server is accessed through an N6 interface of the PSA, the application server of the same application can be deployed in a plurality of positions, and the network can select the PSA which is close to the terminal equipment and can support the terminal equipment to access the DN at the same time according to the access position of the terminal equipment, so that routing detour is reduced, and network delay is reduced.

The terminal equipment (UE) in fig. 6 may be referred to as a terminal (terminal), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Specifically, the terminal device in fig. 6 may be a mobile phone (mobile phone), a tablet computer, or a computer with a wireless transceiver function. The terminal device may also be a Virtual Reality (VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned aerial vehicle, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city, a wireless terminal in smart home (smart home), a vehicle-mounted terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, an intelligent network vehicle, an unmanned aerial vehicle with unmanned aerial vehicle-to-unmanned aerial vehicle (UAV, U2U) communication capability, or the like, without limitation.

The access network element in fig. 6 may be any device with a radio transceiver function, and is mainly used for implementing a radio physical control function, a resource scheduling function, a radio resource management function, a radio access control function, a mobility management function, and the like. Specifically, the access network element may be a device supporting wired access, or may be a device supporting wireless access. The access network element may be AN Access Network (AN)/radio access network (radio access network, RAN) device, which is composed of a plurality of 5G-AN/5G-RAN nodes, for example. The 5G-AN/5G-RAN node may be: an Access Point (AP), a base station (NB), an enhanced nodeB (eNB), a next generation base station (NR nodeB, gNB), a transmission reception point (transmission reception point, TRP), a transmission point (transmission point, TP), or some other access node, etc.

The delay-sensitive communication and time synchronization network elements in fig. 6 are mainly responsible for collecting and generating parameters related to delay-sensitive traffic.

The mobility management network element in fig. 6 is mainly responsible for the operations of access authentication, mobility management, signaling interaction among various functional network elements, and the like of the terminal device, such as: the registration state of the user, the connection state of the user, the user registration network access, the tracking area update, the cell switching user authentication, the key security and the like are managed.

The session management network element in fig. 6 may be referred to as a session management function or multicast/multicast service management function (MB-SMF) or multicast session management network element, etc., without limitation. The session management network element is mainly used for realizing a user plane transmission logic channel, such as: session management functions such as establishment, release, and modification of Packet Data Unit (PDU) sessions.

The policy control network element in fig. 6 may be configured to provide policies to mobility management network elements, session management network elements, such as: quality of service (quality of service) policy, and the like.

The policy control network element may include an access and mobile control policy control network element and a session management policy control network element, where the access and mobile control policy control network element may manage information related to mobility and registration information of the terminal device, such as a terminal device policy; the session management policy control network element can manage the policy related to the session, receive the information related to the session management by the application function network element, and interact with the session management network element.

The user plane network element in fig. 6 may be referred to as a PDU session anchor (PSF), user plane function, or multicast/multicast user plane function (multicast/broadcast user plane fuction, MB-UPF). The user plane network element can be used as an anchor point on a user plane transmission logic channel, and is mainly used for completing functions of routing forwarding and the like of user plane data, such as: and a channel (namely a user plane transmission logic channel) is established between the mobile terminal and the terminal, and data packets between the terminal and the DN and data message filtering, data forwarding, rate control, charging information generation and the like are carried out on the channel. A multicast/Multicast (MB) service controller (MB service controller) having service management functions such as group management, security management, and service announcement.

The application function network element in fig. 6 is mainly an intermediate function entity for providing interaction between the application server and a network element in the core network, through which the application server can realize dynamic control of network service quality and charging, guarantee SLA requirements, obtain operation information of a certain network element in the core network, and the like. In the embodiment of the application, the application function network element can be a function entity deployed by an operator, or can be a function entity deployed by a service provider, and the service provider can be a third party service provider, or can be a service provider in the operator without limitation.

The network storage network element in fig. 6 may be used to store subscriber data such as subscription information, authentication/authorization information, etc.

The data network DN in fig. 6 may be an operator network providing data transmission services to users, such as: an operator network that provides IP Multimedia Services (IMS) to users, etc. An application server (application server, AS) may be deployed in the DN, which may provide data transfer services to users.

It should be noted that, the terminal device, the access network element, and the core network element in the embodiments of the present application may be one or more chips, or may be a System On Chip (SOC) or the like. Fig. 6 is merely an exemplary drawing, which includes no limitation on the number of devices. Furthermore, the communication system may include other devices in addition to the device shown in fig. 6. The names of the respective devices and the respective links in fig. 6 are not limited, and the respective devices and the respective links may be named as other names in addition to the names shown in fig. 6. In addition to the network elements shown in fig. 6, the network shown in fig. 6 may further include, without limitation, a network slice selection network element, a network warehouse network element, an authentication service network element, a network data analysis network element, a network presentation network element, and the like.

Taking the communication system shown in fig. 6 as an example of a 5G communication system, as shown in fig. 7, the network element or entity corresponding to the access network element may be a radio access network (radio access network, RAN) in the 5G communication system, the network element or entity corresponding to the delay sensitive communication and time synchronization network element may be a delay sensitive communication and time synchronization function (time sensitive communication and time synchronization function, TSCTSF) in the 5G communication system, the network element or entity corresponding to the mobility management network element may be an access and mobility management function (access and mobility management function, AMF) in the 5G communication system, the network element or entity corresponding to the session management network element may be a session management function (session management function, SMF) in the 5G communication system, the policy control network element may be a policy control function (policy control function, PCF) in the 5G communication system, the network element or entity corresponding to the user plane network element may be a user plane function (user plane function, UPF) in the 5G communication system, the network element or entity corresponding to the application function may be an application function (application function, AF) in the 5G communication system, the network element corresponding to the network element or entity may be a unified function (5248, the network element or entity corresponding to the user plane) in the 5G communication system, the network element may be a unified network element (5248, a unified network element or a network element (5248) in the warehouse network system) may be a network element or a network system may be a unified network element (unified data repository) or a network system may be a network element or a network element may be a network element or a network system may be selected from a network element or a network system is 35, NRF), the network element or entity corresponding to the authentication service network element may be an authentication service function (authentication server function, AUSF) in the 5G communication system, the network element or entity corresponding to the network data analysis network element may be a network data analysis function (network data analytics function, NWDAF) in the 5G communication system, the network element or entity corresponding to the network presentation network element may be a network presentation function (network exposure function, NEF) in the 5G communication system, the network element or entity corresponding to the service control network element may be a service control point (service control point, SCP) in the 5G communication system, etc.

As shown in fig. 7, the terminal device may communicate with the AMF through a next generation network (N) 1 interface (N1 for short), the RAN device communicates with the AMF through an N2 interface (N2 for short), the RAN device communicates with the UPF through an N3 interface (N3 for short), and the UPF communicates with the application server in the DN through an N6 interface. The core network elements can communicate with each other through a service interface, for example: AMF can communicate with other core network elements through Namf interface, SMF can communicate with other core network elements through Nsf interface, NSSF can communicate with other core network elements through Nnssf interface, NEF can communicate with other core network elements through Nnef interface, NRF can communicate with other core network elements through Nnrf interface, UDM can communicate with other core network elements through Nudr interface, NWDAF can communicate with other core network elements through Nnwdaf interface, AUSF can communicate with other core network elements through Nausf interface.

In specific implementation, as shown in fig. 6 or fig. 7, for example: each of the terminal device, the access network element, and the core network element may adopt the composition structure shown in fig. 8, or include the components shown in fig. 8. Fig. 8 is a schematic diagram illustrating a communication device 800 according to an embodiment of the present application, where the communication device 800 may be a terminal or a chip or a system on a chip in the terminal; or can be an access network element or a chip or a system on chip in the access network element; or may be a core network element or a chip or a system on a chip in a core network element. As shown in fig. 8, the communication device 800 includes a processor 801, a transceiver 802, and a communication line 803.

Further, the communication device 800 may also include a memory 804. The processor 801, the memory 804, and the transceiver 802 may be connected by a communication line 803.

The processor 801 is a central processing unit (central processing unit, CPU), a general purpose processor network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, a programmable logic device (programmable logic device, PLD), or any combination thereof. The processor 801 may also be any other means for processing, such as, without limitation, circuitry, devices, or software modules.

A transceiver 802 for communicating with other devices or other communication networks. The other communication network may be an ethernet, a radio access network (radio access network, RAN), a wireless local area network (wireless local area networks, WLAN), etc. The transceiver 802 may be a module, circuitry, transceiver, or any device capable of enabling communications.

Communication line 803 is used to transfer information between the components included in communication device 800.

Memory 804 is used to store instructions. Wherein the instructions may be computer programs.

The memory 804 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device capable of storing static information and/or instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device capable of storing information and/or instructions, an EEPROM, a CD-ROM (compact disc read-only memory) or other optical disk storage, an optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, etc.

It is noted that the memory 804 may exist separately from the processor 801 or may be integrated with the processor 801. The memory 804 may be used to store instructions or program code or some data, etc. The memory 804 may be located within the communication device 800 or may be located outside the communication device 800, without limitation. The processor 801 is configured to execute instructions stored in the memory 804 to implement a redundancy transmission request method according to an embodiment of the present application.

In one example, processor 801 may include one or more CPUs, such as CPU0 and CPU1 in fig. 8.

As an alternative implementation, communication device 800 includes multiple processors, e.g., processor 807 in addition to processor 801 in fig. 8.

As an alternative implementation, the communication apparatus 800 further comprises an output device 805 and an input device 806. Illustratively, the input device 806 is a keyboard, mouse, microphone, or joystick device, and the output device 805 is a display screen, speaker (spaker), or the like.

It should be noted that the communication apparatus 800 may be a desktop computer, a portable computer, a web server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as in fig. 8. Further, the constituent structure shown in fig. 3 does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 8, or may combine some components, or may be arranged in different components.

In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

Further, actions, terms, and the like, which are referred to between embodiments of the present application, are not limited thereto. The message names of interactions between the devices or parameter names in the messages in the embodiments of the present application are just an example, and other names may be used in specific implementations without limitation.

The redundant transmission request method provided by the embodiment of the present application is described below with reference to the communication system shown in fig. 6 or fig. 7.

In a first possible design, as shown in fig. 9, a delay sensitive communication and time synchronization network element or a session management network element may determine to establish a dual redundancy session based on PER requirements and PER information.

The PER information may be PER information of a target network element, or PER information between target network elements, where the target network element may include an access network element and a user plane network element. I.e., PER information may include one or more of the following: PER information of an access network element, PER information of a user plane network element, PER information between the access network element and the user plane network element, and PER information from terminal equipment to the user plane network element.

Illustratively, as shown in fig. 10, the delay-sensitive communication and time synchronization network element or session management network element may request the access and mobility control policy control network element to modify the urs rules through the network storage network element, and the terminal device establishes the dual redundancy session according to the modified urs rules.

In yet another example, as shown in fig. 11, the delay sensitive communication and time synchronization network element or session management network element may also discover the access and mobile control policy control network element through the binding support function network element, and modify the urs p rule by the access and mobile control policy control network element, and the terminal device establishes the dual redundancy session according to the modified urs p rule.

In yet another example, as shown in fig. 12, the delay-sensitive communication and time synchronization network element or the session management network element may also notify the application function network element, and the application function network element initiates a modification procedure of the urs rule, and the terminal device establishes the dual redundancy session according to the modified urs rule.

In a second possible design, as shown in fig. 13, the delay-sensitive communication and time synchronization network element or the session management network element may also determine to establish a dual N3/N9 redundant transmission path according to the PER requirement and PER information.

Based on the above description of fig. 9 to 13, the redundant transmission request method shown in fig. 9 and 13 will be described in detail with reference to fig. 14 below, taking delay-sensitive communication and time synchronization network elements as examples.

Fig. 14 is a flowchart of a redundant transmission request method according to an embodiment of the present application, as shown in fig. 14, where the method may include:

Step 1401, a delay sensitive communication and time synchronization network element obtains PER requirements and PER information.

Specifically, in the registration and session establishment process of the terminal device, the delay sensitive communication and time synchronization network element may acquire the PER requirement and PER information, and determine to establish a dual redundancy session or determine to establish a dual N3/N9 redundancy transmission path according to the PER requirement and PER information.

The PER information may be pre-configured in delay sensitive communication and time synchronization network elements, for example.

In yet another example, as shown in fig. 15, the delay sensitive communication and time synchronization network element may acquire the PER requirement and PER information by using a method shown in fig. 15, and specifically, the method may include:

step 1501, a delay sensitive communication and time synchronization network element obtains PER requirements.

Illustratively, as shown at 1501a in fig. 15, a delay sensitive communication and time synchronization network element may receive PER requirements from an application function network element.

The application function network element can send the PER requirement carried in the application function request to the time delay sensitive communication and time synchronization network element.

Optionally, the application function request further includes one or more of: identification information of terminal equipment, application flow descriptors of services, routing parameters for configuring URSP rules, application function network element information, application information and the like; wherein the application information may be used to indicate that the application supports redundant transmission.

Optionally, the application function request further includes indication information for indicating support for dynamically establishing the dual redundancy session.

It should be noted that, according to the application function request, the delay sensitive communication and time synchronization network element may store a routing parameter for configuring the urs rule, and the delay sensitive communication and time synchronization network element may also send the parameter to the access and mobile control policy control network element or the network storage network element, so as to be used for triggering the establishment of the dual redundancy session.

Optionally, the application function network element sends the application function request to the delay sensitive communication and time synchronization network element through the network presentation network element.

In step 1502, the delay sensitive communication and time synchronization network element sends a first request to the session management network element through the session management policy control network element according to the PER requirement.

Wherein, the first request may be used to request to collect PER information and report.

Alternatively, the delay sensitive communication and time synchronization network element may send the first information carried in the PER collection request to the session management policy control network element.

Wherein the PER collect request may include one or more of: identification information of terminal equipment, application flow descriptor of service and PER report threshold.

Alternatively, the session management policy control network element may send the first request to the session management network element in a PER information notification subscription request.

Wherein the PER information notification subscription request may include one or more of: session identification information (session ID), quality of service flow identification information (QoS flow ID), PER reporting threshold.

Step 1503, the session management network element subscribes PER information to the access network element.

The session management network element may subscribe to the PER information from the access network element by sending a PER information notification subscription request to the access network element.

Wherein the PER information notification subscription request may include one or more of: the identification information of the session, the identification information of the service quality stream and the PER report threshold.

Step 1504, the access network element sends PER information to the session management network element.

The access network element may send PER information to the session management network element in a manner of sending PER information status notification to the session management network element.

Wherein, the PER information sent by the access network element may include one or more of the following: PER information of the access network element, PER information between the access network element and the user plane network element, and PER information from the terminal equipment to the user plane network element.

It should be noted that, the PER information between the access network element and the user plane element may be sent by the access network element to the session management element, or may be preconfigured in the session management element. When the PER information between the access network element and the user plane element is preconfigured in the session management network element, the session management network element can directly report the PER information between the access network element and the user plane element to the delay sensitive communication and time synchronization network element.

Wherein the PER information may include one or more of: the method comprises the steps of determining the PER state of a service, PER capability information of an access network element, the packet error rate of the service, the packet loss rate of the service and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement and redundant transmission cannot be performed.

When the session management network element subscribes to the PER information notification from the access network element, if the PER information notification subscription request contains a PER report threshold, when the PER of a specific service at the access network element reaches the PER report threshold, a report flow is triggered (in this case, the access network element needs to continuously perform PER measurement on the specific service, and when the PER of the service is higher than the PER report threshold, PER report is triggered), at this time, the access network element can report the PER state of the service to the session management network element.

The session management network element may also subscribe to a PER capability report of the access network element, where the access network element reports PER capability information (i.e. a PER guarantee that can be provided, service capability information of the access network element may be provided, and not for a specific service) according to a current load, a channel state, and the like.

Optionally, the session management network element may also subscribe to periodic reporting of the PER, i.e. the access network element periodically reports the PER state of the service or the PER capability information of the access network element according to the reporting period set during subscription.

Optionally, the PER information status notification may further include one or more of: identification information of session, identification information of service quality stream.

Step 1505, the session management network element subscribes PER information to the user plane network element.

Step 1506, the user plane network element sends PER information to the session management network element.

Wherein, the PER information sent by the user plane network element may include one or more of the following: PER information of the user plane network element, PER information between the access network element and the user plane network element, and PER information from the terminal equipment to the end of the user plane network element.

It should be noted that, PER information between the access network element and the user plane element may be sent by the user plane element to the session management element, or may be preconfigured in the session management element.

Wherein the PER information may include one or more of: the method comprises the steps of determining the PER state of a service, PER capability information of a user plane network element, the packet error rate of the service, the packet loss rate of the service and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement and redundant transmission cannot be performed.

The description of the session management network element obtaining the PER information from the user plane network element may refer to the description of the session management network element obtaining the PER information from the access network element in the above step 1503 and step 1504, which are not repeated.

Step 1507, the session management network element sends PER information to the delay sensitive communication and time synchronization network element.

Wherein the PER information may include one or more of: the method comprises the steps of PER state of a service, PER capability information, packet error rate of the service, packet loss rate of the service, and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement of redundant transmission.

Alternatively, the steps 1502 to 1507 may be replaced by the following steps 1508 to 1511, where the delay sensitive communication and time synchronization network element may obtain PER information according to the steps 1502 to 1507, or may obtain PER information according to the following steps 1508 to 1511:

step 1508, the delay sensitive communication and time synchronization network element subscribes to the PER information from the access network element.

Step 1509, the access network element sends PER information to the delay sensitive communication and time synchronization network element.

Step 1510, the delay sensitive communication and time synchronization network element subscribes PER information to the user plane network element.

Step 1511, the user plane network element sends PER information to the delay sensitive communication and time synchronization network element.

The description of subscribing the PER information to the target network element by the time-sensitive communication and the time-synchronous network element may refer to the description related to subscribing the PER information to the target network element by the session management network element in the steps 1503 to 1506, which is not repeated.

When the target network element is an access network element, if the PER information is the PER state of the service, the access network element needs to report the PER state of the service to the time delay sensitive communication and time synchronization network element through the session management network element; if the PER information is PER capability information, the access network element can report the PER capability information to the time delay sensitive communication and time synchronization network element through the session management network element, and can also directly report the PER capability information to the time delay sensitive communication and time synchronization network element.

When the target network element is a user plane network element, the user plane network element can report the PER information to the time delay sensitive communication and time synchronization network element through the session management network element, and can also report the PER information to the time delay sensitive communication and time synchronization network element directly no matter whether the PER information is the PER state or PER capability information of the service.

Alternatively, the steps 1502 to 1507 or the steps 1508 to 1511 may be replaced by the following step 1512, where the delay sensitive communication and time synchronization network element may obtain PER information according to the steps 1502 to 1507, obtain PER information according to the steps 1508 to 1511, and obtain PER information according to the step 1512:

step 1512, the delay sensitive communication and time synchronization network element receives PER information from the network management system.

The description of the PER information may refer to the descriptions of the PER information in the steps 1502 to 1511, which are not described herein.

Step 1402, the time delay sensitive communication and time synchronization network element determines to establish a dual redundancy session according to the PER requirements and PER information.

Optionally, when the delay sensitive communication and time synchronization network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it can be determined to establish a dual redundancy session, and the PER requirement of the service is guaranteed through the dual redundancy session.

Alternatively, the delay sensitive communication and time synchronization network element may also guarantee PER requirements of the service through dual N3/N9 redundant transmission paths by performing step 1403 described below.

In step 1403, the delay sensitive communication and time synchronization network element determines to establish a dual N3/N9 redundant transmission path according to the PER requirement and the PER information.

Optionally, when the delay sensitive communication and time synchronization network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it can be determined to establish a dual N3/N9 redundancy transmission path, and the PER requirement of the service is guaranteed through the dual redundancy session.

Optionally, the delay sensitive communication and time synchronization network element may also check whether the terminal device can establish a dual redundancy session.

Wherein the content of the inspection may include one or more of the following: (1) the access network element supports dual connectivity, and within the mobile range of the terminal device, the coverage of the access network element supports dual connectivity, and (2) the terminal device supports dual connectivity.

It should be noted that, the deployment of the user plane network element is consistent with the access network element, and supports the redundant user plane path. The transmission topology of the bottom layer is consistent with the deployment of the access network element and the user plane network element, and the redundant user plane path is supported. The topology and geographical distribution of the physical network supports redundant user plane transmissions. The devices on the redundant paths may be independent of each other (e.g., different power supplies may be used).

In the methods shown in fig. 14 to 15, the delay sensitive communication and time synchronization network element may perform PER detection on the access network element and the user plane network element, and determine to establish a dual N3/N9 redundancy transmission path according to PER requirements and PER information, or establish a dual redundancy session, that is, may dynamically trigger the establishment of redundancy transmission according to PER requirements, and ensure implementation of PER requirements while performing redundancy transmission.

Unlike the above-described determination of establishing a dual N3/N9 redundancy transmission path or establishing a dual redundancy session by the delay sensitive communication and time synchronization network element according to the PER requirement and PER information in fig. 14 to 15, referring to fig. 16 to 17a below, the dual N3/N9 redundancy transmission path or establishing a dual redundancy session may also be determined by the session management network element according to the PER requirement and PER information.

Fig. 16 is a flowchart of a redundant transmission request method according to an embodiment of the present application, as shown in fig. 16, where the method may include:

step 1601, the session management network element obtains PER requirements and PER information.

Specifically, during the registration and session establishment of the terminal device, the session management network element may acquire the PER requirement and PER information, and determine to establish a dual-redundancy session or determine to establish a dual-N3/N9 redundancy transmission path according to the PER requirement and PER information.

As shown in fig. 17a, the session management network element may obtain the PER requirement and the PER information by using the method described in fig. 17a, and specifically, the method may include:

step 1701a, the session management network element obtains PER requirements.

Illustratively, as shown at 1701a' in fig. 17a, the session management network element may receive PER requirements from the application function network element via the session management policy control network element.

The application function network element may send the PER requirement carried in the application function request to the session management policy control network element.

Optionally, the application function request further includes identification information and application information of the terminal device; wherein the application information may be used to indicate that the application supports redundant transmission.

Optionally, the application function request further includes one or more of: the traffic application traffic descriptor, routing parameters for configuring the urs rules, application function network element information, etc. are not limited.

Optionally, the application function network element sends the application function request to the session management policy control network element through the network presentation network element.

The session management policy control network element may send the PER requirement carried in the PER information notification subscription request to the session management network element.

Step 1702a, the session management network element subscribes PER information to the access network element.

Step 1703a, the access network element sends PER information to the session management network element.

Step 1704a, the session management network element subscribes PER information to the user plane network element.

Step 1705a, the user plane network element sends PER information to the session management network element.

The description of the session management network element obtaining the PER information may refer to the description related to the session management network element obtaining the PER information in the steps 1503 to 1506, which is not repeated.

Step 1602, the session management network element determines to establish a dual redundancy session according to the PER requirements and PER information.

Optionally, when the session management network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it may be determined to establish a dual redundancy session, and the PER requirement of the service is guaranteed through the dual redundancy session.

Alternatively, the session management network element may also guarantee PER requirements of the service by performing step 1603, described below, through dual N3/N9 redundant transmission paths.

Step 1603, the session management network element determines to establish a dual N3/N9 redundant transmission path according to the PER requirement and PER information.

Optionally, when the session management network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it may be determined to establish a dual N3/N9 redundant transmission path, and the PER requirement of the service is guaranteed through the dual N3/N9 redundant transmission path.

In the method shown in fig. 16 to 17a, the session management network element may perform PER detection on the access network element and the user plane network element, and determine to establish a dual N3/N9 redundancy transmission path according to PER requirements and PER information, or establish a dual redundancy session, that is, may dynamically trigger the establishment of redundancy transmission according to PER requirements, and ensure implementation of PER requirements while performing redundancy transmission.

Unlike the above-described determination of the establishment of the dual N3/N9 redundancy transmission path or the establishment of the dual redundancy session by the session management network element according to the PER requirement and PER information in fig. 16 to 17a, the determination of the establishment of the dual N3/N9 redundancy transmission path or the establishment of the dual redundancy session by the session management policy control network element according to the PER requirement and PER information may also be performed by referring to fig. 17b described below.

Fig. 17b is a flowchart of a redundant transmission request method according to an embodiment of the present application, where, as shown in fig. 17b, the method may include:

step 1701b, the session management policy controls the network element to obtain the PER requirement.

Illustratively, as shown at 1701b' in fig. 17b, the session management policy control network element may receive PER requirements from the application function network element.

In yet another example, as shown at 1701b "in fig. 17b, the session management policy control element may receive PER requirements from the application function element via a delay sensitive communication and time synchronization element.

The application function network element can send the PER requirement carried in the application function request to the session management policy control network element, or send the PER requirement to the session management policy control network element through time delay sensitive communication and time synchronization network elements.

Optionally, the session management policy control network element may determine one or more of the following according to PER requirements: session identification information (session ID), quality of service flow identification information (QoS flow ID), PER reporting threshold.

Step 1702b, the session management policy controls the network element to obtain PER information.

Illustratively, as shown in step 1702b' of fig. 17b, the session management policy control network element may receive PER information sent by the session management network element.

Wherein the session management network element may obtain PER information with reference to the method shown in fig. 17 a.

In yet another example, as shown in step 1702b "in fig. 17b, the session management policy control element may receive PER information sent by the network data analysis element.

The network data analysis network element can refer to the session management network element to acquire PER information, and acquire PER information from the target network element.

In the above two examples, after the session management network element or the network data analysis network element obtains the PER information, the PER information from end to end (such as the terminal device < - > access network element < - > user plane network element) may be further aggregated according to the obtained PER information, and the aggregated PER information may be sent to the session management policy control network element.

Step 1703b, the session management policy control network element determines to establish a dual redundancy session according to the PER requirement and PER information.

Specifically, during the registration and session establishment of the terminal device, the session management policy control network element may obtain the PER requirement and the PER information, and determine whether to establish the dual-redundancy session according to the PER requirement and the PER information.

Optionally, when the session management policy control network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it may be determined to establish a dual redundancy session, and the PER requirement of the service is guaranteed through the dual redundancy session.

Alternatively, the session management policy control element may also guarantee the PER requirement of the service through the dual N3/N9 redundant transmission path by performing step 1704b described below.

Step 1704b, the session management policy control network element determines to establish a dual N3/N9 redundant transmission path according to the PER requirement and the PER information.

Specifically, during the registration and session establishment of the terminal device, the session management policy control network element may acquire the PER requirement and the PER information, and determine whether to establish the dual N3/N9 redundant transmission path according to the PER requirement and the PER information.

Optionally, when the session management policy control network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it may be determined to establish a dual N3/N9 redundant transmission path, and the PER requirement of the service is guaranteed through the dual N3/N9 redundant transmission path.

Unlike the session management policy control network element determining to establish a dual redundancy session or to establish a dual N3/N9 redundancy transmission path according to PER requirements and PER information in step 1703b or step 1704b described above, the session management policy control network element may also determine whether to establish a dual redundancy session or to establish a dual N3/N9 redundancy transmission path according to PER requirements and 5G quality of service identification (5G QoS identifier,5QI) information.

Wherein 5QI may be used to indicate QoS characteristics of the 5G, the 5QI information may include a set of QoS parameters.

For example, after the session management policy controls the network element to obtain the PER requirement, whether a corresponding 5QI exists or not may be determined according to the PER requirement, if not, it may be considered that the current link cannot guarantee the PER requirement of the service, it may be determined to establish a dual redundancy session, or it may be determined to establish a dual N3/N9 redundancy transmission path, so as to guarantee the PER requirement of the service.

In the method shown in fig. 17b, the session management policy control network element may determine to establish a dual redundancy session according to the PER requirement and PER information, or establish a dual N3/N9 redundancy transmission path, that is, may dynamically trigger the establishment of redundancy transmission according to the PER requirement, and ensure implementation of the PER requirement while performing redundancy transmission.

Unlike the above-described establishment of the dual N3/N9 redundancy transmission path or the dual redundancy session determined by the session management policy control network element according to the PER requirement and PER information in fig. 17b, the dual N3/N9 redundancy transmission path or the dual redundancy session may be established by the access and mobility control policy control network element according to the PER requirement and PER information, as described below with reference to fig. 17 c.

Fig. 17c is a flowchart of a redundant transmission request method according to an embodiment of the present application, where, as shown in fig. 17c, the method may include:

step 1701c, access and mobility control policy controls the network element to obtain PER requirements.

Illustratively, as shown at 1701c' in fig. 17c, the access and mobile control policy control network element may receive PER requirements from the session management policy control network element.

The session management policy control network element may receive the PER requirement from the application function network element, or the session management policy control network element may receive the PER requirement from the application function network element through the delay sensitive communication and time synchronization network element, without limitation.

The application function network element can send the PER requirement to the access and mobile control strategy control network element through the session management strategy control network element in the application function request, or send the PER requirement to the access and mobile control strategy control network element through the time delay sensitive communication and time synchronization network element and the session management strategy control network element in the application function request.

In one example, an access and mobile control policy control network element receives application information from a session management policy control network element application function network element and receives indication information from the application function network element indicating support for dynamically establishing a dual redundancy session.

In yet another example, an access and mobile control policy control network element receives application information from a session management policy control network element and indication information for indicating support for dynamically establishing a dual redundancy session.

Optionally, the application function request further includes indication information for indicating that the terminal device supports dynamic establishment of the dual redundancy session.

It should be noted that, the application function network element may carry, in the same application function request, indication information for indicating that the terminal device supports dynamically establishing the dual-redundancy session and PER requirements, and send the indication information and the PER requirements to the access and mobile control policy control network element through the session management policy control network element. The indication information for indicating the terminal equipment to support the dynamic establishment of the dual-redundancy session and the PER requirement can be carried in different application function requests, at this time, the application function network element can send the application function request carrying the PER requirement to the access and mobile control strategy control network element through the session management strategy control network element, and directly send the application function request carrying the indication information for indicating the terminal equipment to support the dynamic establishment of the dual-redundancy session to the access and mobile control strategy control network element.

It should be noted that, PER information sent by the session management policy control network element to the access and mobile control policy control network element may be PER information in the application function request, or may be QoS information determined according to the PER information in the application function request, which is not limited.

Step 1702c, access and mobility control policy control network element obtains PER information.

Illustratively, as shown in step 1702c' of fig. 17c, the access and mobility control policy control element may receive PER information sent by the network data analysis element.

After the network data analysis network element obtains the PER information, the PER information from end to end (such as the terminal equipment < - > access network element < - > user plane network element) can be further aggregated according to the obtained PER information, and the aggregated PER information is sent to the access and mobile control strategy control network element.

Step 1703c, the access and mobile control policy control network element determines to establish a dual redundancy session according to the PER requirements and PER information.

Specifically, the access and mobile control policy control network element may acquire PER information after the session establishment of the terminal device is completed, and determine whether to establish the dual-redundancy session according to the PER requirement and the PER information.

Optionally, when the access and mobile control policy control network element considers that the current link cannot guarantee the PER requirement of the service according to the PER information, it may be determined to establish a dual redundancy session, and the PER requirement of the service is guaranteed through the dual redundancy session.

Alternatively, the access and mobility control policy control network element may also guarantee PER requirements for the service through the dual N3/N9 redundant transmission path by performing step 1704c described below.

In the method shown in fig. 17c, the access and mobile control policy control network element may determine to establish a dual redundancy session according to the PER requirement and PER information, that is, may dynamically trigger the establishment of redundancy transmission according to the PER requirement, and ensure the implementation of the PER requirement while performing redundancy transmission.

Based on the above description of fig. 14 to 17c, the delay sensitive communication and time synchronization network element, or the session management policy control network element, or the access and mobile control policy control network element may determine to establish a dual N3/N9 redundancy transmission path according to the PER requirement and PER information, or determine to establish a dual redundancy session, and the redundancy transmission request method will be described in detail below with reference to the method shown in fig. 18 based on the above description of fig. 10 and 11 by taking the delay sensitive communication and time synchronization network element as an example.

Fig. 18 is a flowchart of a redundant transmission request method according to an embodiment of the present application, as shown in fig. 18, where the method may include:

step 1801, the delay sensitive communication and time synchronization network element stores the third request to the network storage network element.

Wherein the third request may be for the network storage network element to instruct the access and mobility control policy control network element to update the urs rules.

For example, the third request may include one or more of the following: routing parameters, application function network element information, application traffic descriptors.

Alternatively, the delay sensitive communication and time synchronization network element may send the third request to the network storage network element carried in the AM policy request.

Step 1802, the network storage network element sends a data management notification to the access and mobility control policy control network element.

Wherein the data management notification may be used to instruct the access and mobility control policy control network element to update the urs rules; the data management notification may include one or more of the following information: identification information of the terminal device, application traffic descriptor, and routing parameters.

Alternatively, the delay sensitive communication and time synchronization network element may instruct the access and mobility control policy control network element to update the urs rules using steps 1803 to 1804 described below.

Step 1803, the delay sensitive communication and time synchronization network element determines access and mobile control policy control network elements through the binding support function network element.

The time delay sensitive communication and time synchronization network element can determine the access and mobile control strategy control network element by sending the access and mobile control strategy control network element query to the binding support function network element.

Optionally, the access and mobile control policy control network element query may include identification information of the terminal device, and the binding support function network element determines the access and mobile control policy control network element according to the identification information of the terminal device.

Step 1804, the delay sensitive communication and time synchronization network element sends a second request to the access and mobility control policy control network element.

Wherein the second request may be for requesting an update of the urs rules.

Optionally, the second request further includes one or more of: routing parameters, application function network element information, application traffic descriptors.

Alternatively, the delay sensitive communication and time synchronization network element may send the second request to the access and mobility control policy control network element carrying in policy control network element interaction (PCF interaction) information.

The PCF interaction may further include one or more of the following information: identification information of terminal equipment, routing parameters and application function network element information.

Step 1805, the access and mobility control policy controls the network element to update the urs rules.

The description of step 1805 may refer to the description of updating the urs rules of the access and mobility control policy control network element in fig. 3, which is not described herein.

Step 1806, the delay sensitive communication and time synchronization network element receives a urs p update notification from the access and mobility control policy control network element.

Step 1807, the delay sensitive communication and time synchronization network element sends a urs update notification to the application function network element.

The access and mobile control policy control network element can send a URSP update notification to the application function network element through the time delay sensitive communication and time synchronization network element to inform the application function network element that the URSP rule is updated.

Step 1808, the application function network element initiates notification of the application layer to the terminal device.

The application function network element initiates the notification of the application layer to the terminal equipment, so that the client of the terminal equipment can generate two paths of redundant data streams (or data packets described as two redundancy).

Step 1809, the terminal device establishes a dual-redundancy session for the two-path redundancy data stream according to the updated urs rule and transmits the dual-redundancy session.

Based on the method shown in fig. 18, the delay sensitive communication and time synchronization network element can instruct the access and mobile control policy control network element to update the urs rules through the network storage network element, and can determine the access and mobile control policy control network element through the binding support function network element, thereby instructing the access and mobile control policy control network element to update the urs rules, and providing a plurality of feasibility schemes for the delay sensitive communication and time synchronization network element to instruct the access and mobile control policy control network element to update the urs rules.

Based on the method shown in fig. 18, the delay sensitive communication and time synchronization network element may trigger the access and mobility control policy to control the network element to update the urs rules based on the second request or the third request, and the terminal device establishes the dual redundancy session according to the updated urs rules.

Optionally, in the process of data transmission based on the established dual-redundancy session, the delay sensitive communication and time synchronization network element can also dynamically determine whether to release the dual-redundancy session according to the PER requirement and PER information, and then the data transmission is performed by a single session (i.e. a session).

For example, when the time delay sensitive communication and the time synchronization network element consider that the PER requirement of the service can be guaranteed according to the PER information, the established dual-redundancy session can be released, the single session is re-established, and data transmission is performed through the single session.

By way of example, the delay-sensitive communication and time synchronization network element may trigger the access and mobility control policy to control the network element to update the urs p rule by storing information such as routing parameters, application function network element information, and application flow descriptors in the network storage network element, and the terminal device generates a path of data flow according to the updated urs p rule, establishes a single session for the path of data flow, and performs data transmission through the single session.

Wherein the routing parameter may be a single routing parameter.

In another example, after determining the access and mobile control policy control network element, the delay sensitive communication and time synchronization network element may send a urs rule update request to the access and mobile control policy control network element to trigger the access and mobile control policy control network element to update urs rules, and the terminal device generates a path of data flow according to the updated urs rules, and establishes a single session for the path of data flow, and performs data transmission through the single session.

The urs rule update request may include information such as a routing parameter, application function network element information, and an application traffic descriptor, where the routing parameter may be a single routing parameter.

Referring to the description of determining to establish the dual redundancy session by the delay sensitive communication and time synchronization network element in fig. 18, when the access and mobile control policy control network element determines to establish the dual redundancy session, the access and mobile control policy control network element may update the urs rules by referring to step 1805, and further based on steps 1806 to 1809, the terminal device establishes the dual redundancy session for the two paths of redundant data streams according to the updated urs rules and transmits the dual redundancy session.

Optionally, in the process of data transmission based on the established dual-redundancy session, the access and mobile control policy control network element may also dynamically determine whether to release the dual-redundancy session according to the PER requirement and the PER information, and instead, perform data transmission by a single session (i.e., a session).

If the access and mobile control strategy control network element determines to release the dual-redundancy session, the single session is used for data transmission, the access and mobile control strategy control network element can update the URSP rule, the terminal equipment generates one path of data flow according to the updated URSP rule, and establishes the single session for the one path of data flow, and the data transmission is carried out through the single session.

Based on the above description of fig. 14 to 17c, the delay sensitive communication and time synchronization network element or the session management network element may determine to establish a dual N3/N9 redundancy transmission path according to the PER requirement and PER information, or determine to establish a dual redundancy session, and the session management network element determines to establish a dual redundancy session hereinafter, for example, and based on the above description of fig. 10 and 11, a redundancy transmission request method will be described in detail with reference to the method shown in fig. 19.

Fig. 19 is a flowchart of a redundant transmission request method according to an embodiment of the present application, as shown in fig. 19, where the method may include:

step 1901, the session management network element sends third indication information to the session management policy control network element.

Wherein the third indication information may be used to indicate that a dual redundancy session is established.

Step 1902, the session management policy control network element stores the fifth request to the network storage network element.

Wherein the fifth request may be for the network storage element to instruct the access and mobility control policy control element to update the urs rules.

For example, the fifth request may include one or more of the following: routing parameters, application function network element information, application traffic descriptors.

Alternatively, the session management policy control network element may send the fifth request to the network storage network element, carried in the AM policy request.

Step 1903, the network storage network element sends a data management notification to the access and mobile control policy control network element.

Alternatively, the session management policy control network element may instruct the access and mobility control policy control network element to update the urs rules using steps 1904 to 1905 described below.

Step 1904, the session management policy control network element determines the access and mobile control policy control network element through the binding support function network element.

The session management policy control network element can determine the access and mobile control policy control network element by sending an access and mobile control policy control network element query to the binding support function network element.

Step 1905, the session management policy control network element sends a fourth request to the access and mobility control policy control network element.

Wherein the fourth request may be for requesting an update of the urs rules.

Alternatively, the session management policy control element may send the fourth request to the access and mobility control policy control element in policy control element interaction (PCF) information.

Step 1906, the access and mobility control policy control network element updates the urs rules.

Step 1907, the access and mobility control policy control network element sends a urs update notification to the application function network element.

Step 1908, the application function network element initiates notification of the application layer to the terminal device.

And 1909, the terminal equipment establishes a double-redundancy session for the two paths of redundant data streams according to the updated URSP rule and transmits the double-redundancy session.

The descriptions of steps 1906 to 1909 may refer to the descriptions of steps 1805 to 1809, which are not repeated.

Based on the method shown in fig. 19, the session management network element may instruct the access and mobile control policy control network element to update the urs rules through the session management policy control network element, and provide various feasibility schemes for the session management network element to instruct the access and mobile control policy control network element to update the urs rules.

Based on the method shown in fig. 19, the session management network element and the session management policy control network element may trigger the access and mobility control policy control network element to update the urs p rule based on the fourth request or the fifth request, and the terminal device establishes the dual redundancy session according to the updated urs p rule.

Optionally, in the process of data transmission based on the established dual-redundancy session, the session management network element may also dynamically determine whether to release the dual-redundancy session according to the PER requirement and the PER information, and instead, perform data transmission by a single session (i.e., a session).

For example, when the session management network element considers that the PER requirement of the service can be guaranteed according to the PER information, the established dual-redundancy session can be released, the single session is re-established, and data transmission is performed through the single session.

The session management policy control network element may store, for example, information such as routing parameters, application function network element information, and application flow descriptors, to the network storage network element to trigger the access and mobile control policy control network element to update the urs p rule, and the terminal device generates a path of data flow according to the updated urs p rule, establishes a single session for the path of data flow, and performs data transmission through the single session.

Wherein the routing parameter may be a single routing parameter.

In another example, the session management network element may send, to the session management policy control network element, indication information for indicating to establish a single session, or after determining the access and mobile control policy control network element, the session management policy control network element may send a urs rule update request to the access and mobile control policy control network element to trigger the access and mobile control policy control network element to update urs rules, where the terminal device generates a path of data flow according to the updated urs rule, establishes a single session for the path of data flow, and performs data transmission through the single session.

When the session management policy control network element determines to establish the dual redundancy session, the session management policy control network element may instruct the access and mobility control policy control network element to update the urs rules with reference to steps 1902 and 1903, or instruct the access and mobility control policy control network element to update the urs rules with reference to steps 1904 and 1905, and further update the urs rules with the access and mobility control policy control network element based on steps 1906 to 1909, and the terminal device establishes the dual redundancy session for the two-way redundancy data stream according to the updated urs rules and transmits through the two-way dual redundancy session.

Optionally, in the process of data transmission based on the established dual-redundancy session, the session management policy control network element may also dynamically determine whether to release the dual-redundancy session according to the PER requirement and the PER information, and instead, perform data transmission by a single session (i.e., a session).

If the session management policy control network element determines to release the dual-redundancy session, the session management policy control network element performs data transmission instead of the single session, and the session management policy control network element can instruct the access and mobile control policy control network element to update the URSP rule, the terminal equipment generates a path of data stream according to the updated URSP rule, establishes the single session for the path of data stream, and performs data transmission through the single session.

Referring to the description of the session management network element determining to establish the dual-redundancy session in fig. 19, when the access and mobile control policy control network element determines to establish the dual-redundancy session, the access and mobile control policy control network element may update the urs p rule with reference to step 1906, and further based on steps 1907 to 1909, the terminal device establishes the dual-redundancy session for the two-way redundancy data stream according to the updated urs p rule and transmits the dual-way dual-redundancy session.

Based on the description of fig. 14 to 17c, the delay sensitive communication and time synchronization network element or the session management network element can determine to establish a dual N3/N9 redundancy transmission path or determine to establish a dual redundancy session according to the PER requirement and PER information, and the method of redundancy transmission request will be described in detail below with reference to the method shown in fig. 20 based on the description of fig. 12.

Fig. 20 is a flowchart of a redundant transmission request method according to an embodiment of the present application, where, as shown in fig. 20, the method may include:

step 2001, the delay sensitive communication and time synchronization network element sends the first indication information to the application function network element.

Wherein the first indication information may be used to indicate that a dual redundancy session is established.

Step 2002, the application function network element sends a sixth request to the network storage network element through the network presentation network element.

Wherein the sixth request is for requesting an update of the urs rules.

The application function network element may send the sixth request to the network presentation network element in the application function request influencing urs information.

Optionally, the application function request impact urs information may further include one or more of the following: identification information of the terminal equipment, routing parameters and application flow descriptors.

The network presenting network element may store application function request information to the network storing network element, where the application function request information may include identification information of the terminal device and routing parameters.

Optionally, the network presentation network element may also send an application function request response to the application function network element.

Step 2003, the network storage network element sends a data management notification to the access and mobile control policy control network element.

Step 2004, access and mobility control policy controls the network element to update the urs rules.

Step 2005, the application function network element initiates notification of the application layer to the terminal device.

And 2006, the terminal equipment establishes a double-redundancy session for the two paths of redundant data streams according to the updated URSP rule and transmits the double-redundancy session.

The descriptions of steps 2003 to 2006 may refer to the related descriptions in fig. 18, and are not repeated.

Alternatively, after receiving the first indication information, the application function network element may also notify the terminal device to use the session of the dual public land mobile network (public land mobile network, PLMN) for redundancy transmission through an application layer scheme.

Based on the method shown in fig. 20, the delay sensitive communication and time synchronization network element can instruct the access and mobile control policy control network element to update the urs rules through the application function network element, thereby providing a feasibility scheme for instructing the access and mobile control policy control network element to update the urs rules, and meanwhile, decoupling the PER detection and implementation.

Based on the method shown in fig. 20, the delay sensitive communication and time synchronization network element and the application function network element may trigger the access and mobile control policy to control the network element to update the urs p rule based on the first indication information and the sixth request, and the terminal device establishes the dual redundancy session according to the updated urs p rule.

For example, the delay sensitive communication and time synchronization network element may send indication information for indicating to establish a single session to the application function network element, so that the application function network element sends a urs rule update request to the access and mobile control policy control network element, triggers the access and mobile control policy control network element to update urs rules, and the terminal device generates a path of data flow according to the updated urs rules, establishes a single session for the path of data flow, and performs data transmission through the single session.

Referring to the description of determining to establish the dual redundancy session for the delay sensitive communication and the time synchronization network element in fig. 20, when the access and mobile control policy control network element determines to establish the dual redundancy session, the access and mobile control policy control network element may update the urs rules with reference to step 2004, and further based on steps 2005 to 2006, the terminal device establishes the dual redundancy session for the two paths of redundant data streams according to the updated urs rules and transmits through the two paths of dual redundancy session.

Based on the description of fig. 14 to 17c, the delay sensitive communication and time synchronization network element or the session management network element can determine to establish a dual N3/N9 redundancy transmission path or determine to establish a dual redundancy session according to the PER requirement and PER information, and the session management network element determines to establish the dual redundancy session hereinafter, for example, based on the description of fig. 12, a redundancy transmission request method will be described in detail with reference to the method shown in fig. 21.

Fig. 21 is a flowchart of a redundant transmission request method according to an embodiment of the present application, where, as shown in fig. 21, the method may include:

Step 2101, the session management network element sends fourth indication information to the application function network element.

Wherein the fourth indication information may be used to indicate that a dual redundancy session is established.

Step 2102, the application function network element sends a sixth request to the network storage network element through the network presentation network element.

Step 2103, the network storage network element sends a data management notification to the access and mobile control policy control network element.

Step 2104, the access and mobility control policy controls the network element to update the urs rules.

Step 2105, the application function network element initiates notification of the application layer to the terminal device.

And 2106, the terminal equipment establishes a double-redundancy session for the two paths of redundant data streams according to the updated URSP rule and transmits the double-redundancy session.

The descriptions of steps 2102 to 2106 may refer to the related descriptions in fig. 20, and are not repeated.

Alternatively, after receiving the first indication information, the application function network element may also notify the terminal device to use the session of the dual PLMN for redundancy transmission through an application layer scheme.

Based on the method shown in fig. 21, the session management network element can instruct the access and mobile control policy control network element to update the urs rules through the application function network element, thereby providing a feasibility scheme for the access and mobile control policy control network element to update the urs rules, and meanwhile, decoupling the PER detection from the implementation.

Based on the method shown in fig. 21, the session management network element and the application function network element may trigger the access and mobility control policy to control the network element to update the urs p rule based on the fourth indication information and the sixth request, and the terminal device may establish the dual redundancy session according to the updated urs p rule.

The session management network element may send, to the application function network element, indication information for indicating to establish a single session, so that the application function network element sends a urs rule update request to the access and mobile control policy control network element, triggers the access and mobile control policy control network element to update urs rules, and the terminal device generates a path of data flow according to the updated urs rules, establishes a single session for the path of data flow, and performs data transmission through the single session.

Referring to the description of the session management network element determining to establish the dual-redundancy session in fig. 21, when the access and mobile control policy control network element determines to establish the dual-redundancy session, the access and mobile control policy control network element may update the urs p rule with reference to step 2104, and further based on steps 2105 to 2106, the terminal device establishes the dual-redundancy session for the two-way redundant data stream according to the updated urs p rule and transmits the dual-way dual-redundancy session.

Based on the above description of fig. 14 to 17c, the delay sensitive communication and time synchronization network element or session management network element can determine to establish a dual N3/N9 redundancy transmission path according to the PER requirement and PER information, or determine to establish a dual redundancy session, and the redundancy transmission request method will be described in detail below with reference to the method shown in fig. 22 by taking the delay sensitive communication and time synchronization network element to determine to establish a dual N3/N9 redundancy transmission path as an example.

Fig. 22 is a flowchart of a redundant transmission request method according to an embodiment of the present application, as shown in fig. 21, where the method may include:

step 2201, the delay sensitive communication and time synchronization network element sends the second indication information to the session management network element.

Wherein the second indication information may be used to indicate that a dual N3/N9 redundant transmission path is established.

Optionally, the delay sensitive communication and time synchronization network element sends the second indication information to the session management network element through the session management policy control network element.

Step 2202, the session management network element establishes a dual N3/N9 redundancy transmission path by initiating a request to the target network element.

The description of step 2202 may refer to the related description of fig. 4 or fig. 5, which will not be repeated.

Based on the description that the dual N3/N9 redundant transmission paths are established by the delay sensitive communication and the time synchronization network element, when the session management network element determines to establish the dual N2/N9 redundant transmission paths, the dual N2/N9 redundant transmission paths can be established with reference to the related description of fig. 4 or fig. 5, which is not repeated.

Based on the method shown in fig. 22, the delay-sensitive communication and time synchronization network element may send second indication information to the session management network element to trigger the session management network element to establish a dual N3/N9 redundant transmission path.

Optionally, in the process of data transmission based on the established dual N3/N9 redundant transmission path, the delay sensitive communication and time synchronization network element may dynamically determine whether to release the dual N3/N9 redundant transmission path according to the PER requirement and the PER information, and then the data transmission is performed by the single N3/N9 transmission path.

For example, when the time delay sensitive communication and time synchronization network element considers that the PER requirement of the service can be guaranteed according to the PER information, the established double N3/N9 transmission paths can be released, the single N3/N9 transmission path is reestablished, and data transmission is carried out through the single N3/N9 transmission path.

For example, the delay sensitive communication and time synchronization network element may send indication information to the session management network element indicating to establish the single N3/N9 transmission path, so that the session management network element establishes the single N3/N9 transmission path.

Optionally, in the process of data transmission based on the established dual N3/N9 redundant transmission path, the session management network element may also dynamically determine whether to release the dual N3/N9 redundant transmission path according to the PER requirement and the PER information, and instead, perform data transmission by using the single N3/N9 transmission path.

For example, when the session management network element considers that the PER requirement of the service can be guaranteed according to the PER information, the established dual N3/N9 transmission path can be released, the single N3/N9 transmission path is reestablished, and data transmission is performed through the single N3/N9 transmission path.

With reference to the description of determining to establish the dual redundancy session for the delay sensitive communication and the time synchronization network element in fig. 22, when the session management policy control network element or the access and mobility control policy control network element determines to establish the dual redundancy session, the session management policy control network element or the access and mobility control policy control network element may send second indication information for indicating to establish the dual N3/N9 redundancy transmission path to the session management network element with reference to step 2201 described above. The session management network element establishes a dual N3/N9 redundant transmission path based on step 2202 described above.

Optionally, in the process of data transmission based on the established dual-redundancy session, the session management policy control network element or the access and mobile control policy control network element may also dynamically determine whether to release the dual-redundancy session according to the PER requirement and the PER information, and instead, perform data transmission by a single session (i.e., a session).

If the session management policy control network element or the access and mobile control policy control network element determines to release the dual-redundancy session, the session management policy control network element or the access and mobile control policy control network element performs data transmission instead of the single session, and may send indication information for indicating to establish the single N3/N9 transmission path to the session management network element, so that the session management network element establishes the single N3/N9 transmission path.

The scheme provided by the embodiment of the application is introduced mainly from the interaction point of the devices. It will be appreciated that each device, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative 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 implemented as hardware or computer software driven 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.

The embodiment of the application can divide the functional modules of each network element according to the method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 23 illustrates a delay sensitive communication and time synchronization network element 230 in the case of dividing the respective functional modules into respective functions. The delay sensitive communication and time synchronization network element 230 may include a transceiver module 2301 and a processing module 2302. The delay-sensitive communication and time synchronization network element 230 may be a delay-sensitive communication and time synchronization network element, or may be a chip applied in the delay-sensitive communication and time synchronization network element or other combination device, component, etc. having the functions of the delay-sensitive communication and time synchronization network element. When the time delay sensitive communication and time synchronization network element 230 is a time delay sensitive communication and time synchronization network element, the transceiver module 2301 may be a transceiver, which may include an antenna, a radio frequency circuit, and the like; the processing module 2302 may be a processor (or processing circuitry), such as a baseband processor, which may include one or more CPUs. When the delay sensitive communication and time synchronization network element 230 is a component having the above delay sensitive communication and time synchronization network element functions, the transceiver module 2301 may be a radio frequency unit; the processing module 2302 may be a processor (or processing circuit), such as a baseband processor. When the time delay sensitive communication and time synchronization network element 230 is a system-on-chip, the transceiver module 2301 may be an input-output interface of a chip (e.g., a baseband chip); the processing module 2302 may be a processor (or processing circuitry) of a system-on-chip, and may include one or more central processing units. It should be appreciated that the transceiver module 2301 in embodiments of the present application may be implemented by a transceiver or transceiver-related circuit components; the processing module 2302 may be implemented by a processor or processor-related circuit components (alternatively referred to as processing circuitry).

For example, transceiver module 2301 may be used to perform all of the transceiving operations performed by the delay-sensitive communication and time synchronization network elements in the embodiments illustrated in fig. 9-22, and/or to support other processes of the techniques described herein; the processing module 2302 may be used to perform all but the transceiving operations performed by the delay sensitive communication and time synchronization network elements in the embodiments illustrated in fig. 9-22, and/or to support other processes of the techniques described herein.

As yet another implementation, the transceiver module 2301 in fig. 23 may be replaced by a transceiver, which may integrate the functionality of the transceiver module 2301; the processing module 2302 may be replaced with a processor, which may integrate the functions of the processing module 2302. Further, the delay-sensitive communication and time synchronization network element 230 shown in fig. 23 may also include a memory.

Fig. 24 shows a session management network element 240 in case of dividing respective functional modules with corresponding respective functions. The session management network element 240 may include a transceiver module 2401 and a processing module 2402. The session management network element 240 may be a session management network element, or may be a chip applied in the session management network element or other combination device, component, etc. having the session management network element function described above. When the session management network element 240 is a session management network element, the transceiver module 2401 may be a transceiver, which may include an antenna, a radio frequency circuit, and the like; the processing module 2402 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs therein. When the session management network element 240 is a component having the session management network element function described above, the transceiver module 2401 may be a radio frequency unit; the processing module 2402 may be a processor (or processing circuit), such as a baseband processor. When the session management network element 240 is a system-on-chip, the transceiver module 2401 may be an input-output interface of a chip (e.g., a baseband chip); the processing module 2402 may be a processor (or processing circuit) of a system-on-chip, and may include one or more central processing units. It should be appreciated that transceiver module 2401 in embodiments of the present application may be implemented by a transceiver or transceiver-related circuit components; the processing module 2402 may be implemented by a processor or processor-related circuit component (alternatively referred to as a processing circuit).

For example, transceiver module 2401 may be used to perform all of the transceiving operations performed by the session management network element in the embodiments illustrated in fig. 9-22, and/or other processes for supporting the techniques described herein; the processing module 2402 may be used to perform all operations performed by the session management network element in the embodiments shown in fig. 9-22, except for transceiving operations, and/or to support other procedures of the techniques described herein.

As yet another implementation, the transceiver module 2401 in fig. 24 may be replaced by a transceiver, which may integrate the functions of the transceiver module 2401; the processing module 2402 may be replaced by a processor, which may integrate the functions of the processing module 2402. Further, the session management network element 240 shown in fig. 24 may further include a memory.

Fig. 25 shows a session management policy control network element 250 in the case where respective functional blocks are divided with corresponding respective functions. The session management policy control network element 250 may include a transceiver module 2501 and a processing module 2502. The session management policy control network element 250 may be a session management policy control network element, or may be a chip applied in the session management policy control network element or other combination device, component, etc. having the session management policy control network element function described above. When the session management policy control network element 250 is a session management policy control network element, the transceiver module 2501 may be a transceiver, which may include an antenna, a radio frequency circuit, and the like; the processing module 2502 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs therein. When the session management policy control network element 250 is a component having the above-described session management policy control network element function, the transceiver module 2501 may be a radio frequency unit; the processing module 2502 may be a processor (or processing circuit), such as a baseband processor. When the session management policy control network element 250 is a chip system, the transceiver module 2501 may be an input-output interface of a chip (e.g., a baseband chip); the processing module 2502 may be a processor (or processing circuit) of a system-on-chip and may include one or more central processing units. It should be appreciated that the transceiver module 2501 in embodiments of the present application may be implemented by a transceiver or transceiver-related circuit components; the processing module 2502 may be implemented by a processor or processor-related circuit component (alternatively referred to as a processing circuit).

For example, transceiver module 2501 may be used to perform all of the transceiving operations performed by session management policy control network elements in the embodiments illustrated in fig. 9-22, and/or other processes for supporting the techniques described herein; the processing module 2502 may be used to perform all operations performed by the session management policy control network element in the embodiments illustrated in fig. 9-22, except for transceiving operations, and/or other procedures for supporting the techniques described herein.

As yet another implementation, the transceiver module 2501 in fig. 25 may be replaced by a transceiver, which may integrate the functions of the transceiver module 2501; the processing module 2502 may be replaced by a processor that may integrate the functionality of the processing module 2502. Further, the session management policy control network element 250 shown in fig. 25 may further include a memory.

Fig. 26 shows an application function network element 260 in the case of dividing the respective function modules with corresponding respective functions. The application function network element 260 may include a transceiver module 2601 and a processing module 2602. The application function network element 260 may be an application function network element, or may be a chip applied in the application function network element or other combination device, component, etc. having the functions of the application function network element. When the application function network element 260 is an application function network element, the transceiver module 2601 may be a transceiver, and the transceiver may include an antenna, a radio frequency circuit, and the like; the processing module 2602 may be a processor (or processing circuitry), such as a baseband processor, which may include one or more CPUs therein. When the application function network element 260 is a component having the function of the application function network element, the transceiver module 2601 may be a radio frequency unit; the processing module 2602 may be a processor (or processing circuitry), such as a baseband processor. When the application function network element 260 is a chip system, the transceiver module 2601 may be an input/output interface of a chip (e.g., a baseband chip); the processing module 2602 may be a processor (or processing circuitry) of a system-on-chip, and may include one or more central processing units. It should be appreciated that the transceiver module 2601 in embodiments of the present application may be implemented by a transceiver or transceiver-related circuit components; the processing module 2602 may be implemented by a processor or processor-related circuit component (alternatively referred to as a processing circuit).

For example, transceiver module 2601 may be used to perform all of the transceiving operations performed by the application function network element in the embodiments shown in fig. 9-22, and/or other processes for supporting the techniques described herein; the processing module 2602 may be used to perform all operations performed by the application function network element in the embodiments shown in fig. 9-22, except for transceiving operations, and/or other procedures for supporting the techniques described herein.

As yet another implementation, the transceiver module 2601 in fig. 26 may be replaced by a transceiver, which may integrate the functions of the transceiver module 2601; the processing module 2602 may be replaced by a processor that may integrate the functionality of the processing module 2602. Further, the application function network element 260 shown in fig. 26 may further include a memory.

The embodiment of the application also provides a computer readable storage medium. All or part of the flow in the above method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above computer readable storage medium, and when the program is executed, the program may include the flow in the above method embodiments. The computer readable storage medium may be an internal storage unit of the terminal (including the data transmitting end and/or the data receiving end) of any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may be an external storage device of the terminal, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card), or the like, which are provided in the terminal. Further, the computer-readable storage medium may further include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

It should be noted that the terms "first" and "second" and the like in the description, the claims and the drawings of the present application are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and three or more, "and/or" for describing an association relationship of an association object, three kinds of relationships may exist, for example, "a and/or B" may mean: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A method for redundant transmission request, comprising:

the time delay sensitive communication and time synchronization network element obtains the error rate PER requirement and PER information;

the time delay sensitive communication and time synchronization network element determines to establish a dual redundancy session according to the PER requirement and the PER information; or alternatively

And the time delay sensitive communication and time synchronization network element determines to establish a double N3/N9 redundant transmission path according to the PER requirement and the PER information.

2. The method of claim 1, wherein the delay sensitive communication and time synchronization network element obtaining the PER requirement comprises:

the time delay sensitive communication and time synchronization network element receives the PER requirement from an application function network element; or alternatively

The delay sensitive communication and time synchronization network element receives the PER requirement from a network presentation network element.

3. The method according to claim 2, wherein the method further comprises:

The delay sensitive communication and time synchronization network element also receives one or more of the following parameters from the application function network element: routing parameters, application information and indication information for indicating support for dynamically establishing the dual-redundancy session; the application information is used for indicating that the application supports redundant transmission.

4. A method according to any one of claim 1 to 3, wherein,

the PER information includes one or more of the following: PER information of an access network element, PER information of a user plane network element, PER information between the access network element and the user plane network element, and PER information from terminal equipment to the user plane network element.

5. The method of any of claims 1-4, wherein the delay sensitive communication and time synchronization network element obtaining the PER information comprises:

the time delay sensitive communication and time synchronization network element receives the PER information from the network management system; or alternatively

The time delay sensitive communication and time synchronization network element sends a first request to a session management network element through a session management policy control network element according to the PER requirement; the time delay sensitive communication and time synchronization network element receives the PER information from the session management network element; the first request is used for requesting to collect PER information and reporting the PER information; or alternatively

The time delay sensitive communication and time synchronization network element subscribes PER information to a target network element according to the PER requirement, and the time delay sensitive communication and time synchronization network element receives the PER information from the target network element; the target network element comprises an access network element and a user plane network element.

6. The method according to any one of claims 1 to 5, wherein,

the PER information includes one or more of the following: the method comprises the steps of PER state of a service, PER capability information, packet error rate of the service, packet loss rate of the service, and indication information for indicating that the packet error rate/packet loss rate of the service cannot meet the requirement of redundant transmission.

7. The method of any of claims 1-6, wherein when the delay sensitive communication and time synchronization network element determines to establish the dual redundancy session based on the PER requirement and the PER information, the method further comprises:

the time delay sensitive communication and time synchronization network element sends a second request to an access and mobile control strategy control network element; wherein the second request is used for requesting updating of a terminal equipment routing policy, urs p, rule; or alternatively

The time delay sensitive communication and time synchronization network element stores a third request to a network storage network element; wherein the third request is for the network storage network element to instruct the access and mobility control policy control network element to update the urs rules.

8. The method of claim 7, wherein the delay-sensitive communication and time synchronization network element sending the second request to the access and mobility control policy control network element comprises:

the time delay sensitive communication and time synchronization network element determines the access and mobile control strategy control network element through a binding support function network element;

the delay sensitive communication and time synchronization network element sends the second request to the access and mobility control policy control network element.

9. The method of claim 7, wherein the step of determining the position of the probe is performed,

the second request includes one or more of: routing parameters, application function network element information, application traffic descriptors; or alternatively

The third request includes one or more of the following: routing parameters, application function network element information, application traffic descriptors.

10. The method of claim 9, wherein the delay-sensitive communication and time synchronization network element storing the third request to the network storage network element comprises:

the time delay sensitive communication and time synchronization network element receives one or more of the following information from the application function network element: routing parameters, application function network element information, application traffic descriptors;

The delay sensitive communication and time synchronization network element sends the third request to the network storage network element.

11. The method according to any one of claims 7-10, further comprising:

the time delay sensitive communication and time synchronization network element receives URSP update notification from the access and mobile control strategy control network element;

the time delay sensitive communication and time synchronization network element sends the URSP update notification to an application function network element.

12. The method of any of claims 1-6, wherein when the delay sensitive communication and time synchronization network element determines to establish the dual redundancy session based on the PER requirement and the PER information, the method further comprises:

the time delay sensitive communication and time synchronization network element sends first indication information to an application function network element; the first indication information is used for indicating to establish a dual-redundancy session.

13. The method of any of claims 1-6, wherein when the delay sensitive communication and time synchronization network element determines to establish the dual N3/N9 redundant transmission path based on the PER requirement and the PER information, the method further comprises:

The time delay sensitive communication and time synchronization network element sends second indication information to the session management network element; the second indication information is used for indicating to establish a double N3/N9 redundant transmission path.

14. A method for redundant transmission request, comprising:

the session management strategy controls a network element to acquire the error rate PER requirement and PER information;

the session management strategy control network element determines to establish a dual-redundancy session according to the PER requirement and the PER information; or alternatively

And the session management strategy control network element determines to establish a double N3/N9 redundant transmission path according to the PER requirement and the PER information.

15. The method of claim 14, wherein the session management policy controlling network element to obtain the PER requirement comprises:

the session management policy control network element receives the PER requirement from an application function network element; or alternatively

The session management policy controls the network element to receive the PER requirements from the application function network element through the delay sensitive communication and time synchronization network element.

16. The method of claim 15, wherein the method further comprises:

the session management policy control network element also receives one or more of the following information from the application function network element: application information, indication information for indicating support to dynamically establish a dual-redundancy session; the application information is used for indicating that the application supports redundant transmission.

17. The method according to any one of claims 14 to 16, wherein,

18. The method according to any of claims 14-17, wherein the session management policy controlling network element obtaining the PER information comprises:

the session management policy control network element receives the PER information from the session management network element; or the session management policy control network element receives the PER information from the network data analysis network element.

19. The method according to any one of claims 14 to 18, wherein,

20. The method according to any one of claims 14-19, further comprising:

the session management policy control network element sends a fourth request to the access and mobile control policy control network element; the fourth request is used for requesting updating of a routing policy URSP rule of the terminal equipment; or alternatively

The session management policy controls the network element to store a fifth request to the network storage network element; wherein the fifth request is for the network storage network element to instruct the access and mobility control policy control network element to update the urs rules.

21. The method according to claim 20, wherein the session management policy control network element sending the fourth request to the access and mobility control policy control network element comprises:

the session management policy control network element determines the access and mobile control policy control network element through a binding support function network element;

and the session management policy control network element sends the fourth request to the access and mobile control policy control network element.

22. The method of claim 20, wherein the step of determining the position of the probe is performed,

the fifth request includes one or more of the following: routing parameters, application function network element information, application traffic descriptors.

23. The method of claim 22, wherein the session management policy control network element storing the fifth request to the network storage network element comprises:

the session management policy control network element receives one or more of the following information from the application function network element: routing parameters, application function network element information, application traffic descriptors;

And the session management strategy control network element sends the fifth request to the network storage network element.

24. A method for redundant transmission request, comprising:

the access and mobile control strategy controls the network element to acquire the error rate PER requirement and PER information;

and the access and mobile control strategy control network element determines to establish a double-redundancy session according to the PER requirement and the PER information.

25. The method of claim 24, wherein the access and mobility control policy control network element obtaining the PER requirement comprises:

the access and mobile control policy control network element receives the PER requirements from a session management policy control network element.

26. The method of claim 25, wherein the method further comprises:

the access and mobile control policy control network element also receives application information from the session management policy control network element; the application information is used for indicating that the application supports redundant transmission.

27. The method according to claim 25 or 26, wherein,

the access and mobile control policy control network element also receives indication information from the application function network element for indicating support for dynamically establishing the dual redundancy session.

28. The method of claim 25, wherein the step of determining the position of the probe is performed,

the access and mobile control policy control network element also receives application information from the session management policy control network element and indication information for indicating support for dynamically establishing a dual-redundancy session; the application information is used for indicating that the application supports redundant transmission.

29. The method of any one of claims 24-28, wherein,

30. The method according to any of claims 24-29, wherein the access and mobility control policy controlling network element to obtain the PER information comprises:

the access and mobility control policy control network element receives the PER information from a network data analysis network element.

31. The method of any one of claims 24-30, wherein,

32. The method according to any one of claims 24-31, further comprising:

the access and mobile control strategy controls the network element to update the routing strategy URSP rule of the terminal equipment;

the access and mobility control policy controls the network element to send a urs update notification to one or more of the following: time delay sensitive communication and time synchronization network elements and application function network elements.

33. A method for redundant transmission request, comprising:

the application function network element receives first indication information from the time delay sensitive communication and time synchronization network element or receives fourth indication information from the session management network element; the first indication information is used for indicating to establish the dual-redundancy session, and the fourth indication information is used for indicating to establish the dual-redundancy session;

the application function network element sends a sixth request to the network storage network element through the network presentation network element; wherein the sixth request is for requesting updating of a terminal device routing policy urs p rule.

34. The method of claim 33, wherein the method further comprises:

the application function network element sends a bit error rate PER requirement to the time delay sensitive communication and time synchronization network element; or alternatively

And the application function network element sends PER requirements to the session management network element through the session management policy control network element.

35. The method of claim 34, wherein the method further comprises:

the application function network element sends one or more of the following information to the delay sensitive communication and time synchronization network element or session management policy control network element: routing parameters, application function network element information, application traffic descriptors.

36. A communication device, the communication device comprising a processor; the processor is configured to execute a computer program or instructions to cause the communication device to perform the redundant transmission request method according to any one of claims 1 to 13, or to perform the redundant transmission request method according to any one of claims 14 to 23, or to perform the redundant transmission request method according to any one of claims 24 to 32, or to perform the redundant transmission request method according to any one of claims 33 to 35.

37. A communication device, comprising an input-output interface and logic circuitry; the input/output interface is used for inputting and/or outputting information; the logic circuit is configured to perform the redundant transmission request method according to any one of claims 1-13, or to perform the redundant transmission request method according to any one of claims 14-23, or to perform the redundant transmission request method according to any one of claims 24-32, or to perform the redundant transmission request method according to any one of claims 33-35, and to process and/or generate the information based on the information.

38. A computer-readable storage medium storing computer instructions or a program that, when run on a computer, cause the computer to perform the redundant transmission request method of any one of claims 1-13, or the redundant transmission request method of any one of claims 14-23, or the redundant transmission request method of any one of claims 24-32, or the redundant transmission request method of any one of claims 33-35.