CN115412981A

CN115412981A - Data transmission method and related equipment

Info

Publication number: CN115412981A
Application number: CN202210809632.7A
Authority: CN
Inventors: 于游洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2022-11-29
Also published as: WO2021088977A1; CN112788680A; CN112788680B

Abstract

The embodiment of the application discloses a data transmission method and related equipment; the method can be applied to a 5G communication network architecture, and comprises the following steps: a session management network element acquires first indication information of a first service flow, wherein the first indication information comprises a shunting mode of the first service flow, and the first service flow is a guaranteed bit rate GBR service flow; the session management network element establishes a first QoS flow and/or a second QoS flow for transmitting the first service flow according to the first indication information; because the session management network element establishes two QoS flows for the service flow in advance, when the service flow data needs to move between different flows, the QoS flows established in advance can be directly applied, the movement of the service flow can be realized without reestablishing the QoS flows at the other side, and the time delay is reduced.

Description

Data transmission method and related equipment

The present application is a divisional application, the application number of the original application is 201911093035.3, the date of the original application is 2019, month 11, and day 07, and the entire contents of the original application are incorporated by reference in the present application.

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission method and related equipment.

Background

With the continuous development of wireless broadband technology, the 3GPP standards group has established 5G network architecture in 2016. The framework not only supports the User Equipment (UE) to access the core network through the wireless access technology (such as LTE, 5G RAN and the like) defined by a 3GPP standard group, but also supports the core network to be accessed through the non-3GPP access technology (such as non-credible WLAN, fixed network and the like), and also supports the core network to be accessed through the 3GPP access technology and the non-3GPP access technology; therefore, a multi-access Protocol Data Unit (PDU) session can be established under the network architecture.

In addition, the 3GPP standard also defines that a service data flow interacted between the UE and the 5G core network is divided into a Guaranteed Bit Rate (GBR) quality of service flow (QoS flow) and a non-guaranteed bit rate (non-GBR flow) QoS flow.

In the prior art, the GBR QoS flow can only be established on one side of the 3GPP side or the non-3GPP side, and when traffic flow data needs to be moved from one side to the other side, the GBR QoS flow needs to be re-established on the other side, which results in an increase of delay.

Disclosure of Invention

The embodiment of the application provides a data transmission method and related equipment, which are used for reducing the switching time delay when business flow data is moved from one side to the other side.

A first aspect of an embodiment of the present application provides a method for data transmission;

the session management network element needs to acquire first indication information of a guaranteed bit rate GBR service flow, where the first indication information has a split mode of the service flow, and the session management network element needs to establish a first quality of service flow QoS flow for transmitting the service flow or establish two QoS flows according to the first indication information.

In the process of session establishment and session modification, a session management network element receives a policy rule, that is, first indication information, for guaranteeing a bandwidth GBR traffic flow, which is sent by a policy control unit, where the policy rule includes a quality of service parameter of the traffic flow and a split mode, where the split mode may indicate that the traffic flow is split between two networks, and since QoS management for traffic flow transmission is performed based on a quality of service flow (QoS flow), the session management network element may establish the first quality of service flow QoS flow according to the split mode of the traffic flow, for example, aggregate traffic flows with the same split mode together to form one QoS flow, or establish two flows, that is, the first QoS flow and the second QoS flow, for the traffic flow.

When QoS flow is established for service flow based on a split mode, a session management network element can directly converge service flow with the same split mode into the same QoS flow, the QoS flow corresponding to the service flow is established in advance, when the service flow data needs to be moved or switched between two networks due to some reason, a new GBR QoS flow does not need to be established on the other side again, the service flow data can be directly moved or switched from a first network to a second network according to the QoS flow established in advance, the service flow data can be directly moved or switched from the second network to the first network, so that the switching delay is small, or when the requirement on the bandwidth of the service flow is high, enough bandwidth resources can be provided through the simultaneous transmission of the first network and the second network.

Based on the first aspect, an embodiment of the present application further provides a first implementation manner of the first aspect:

when the session management network element establishes the QoS flow, a first QoS flow may be established through a first access technology, and when the session management network element establishes two flows for the service flow, the first QoS flow may be established through the first access technology based on a split mode, and a second QoS flow may be established through a second access technology.

Because the session management network element establishes two QoS flows for the service flow in advance, and each flow corresponds to different access technologies, when the service flow data needs to move among different access technologies, the QoS flow established in advance can be directly applied, and the service flow can be switched without reestablishing the flow at the other side, so that the switching time delay is reduced.

Based on the first implementation manner of the first aspect, an embodiment of the present application further provides a second implementation manner of the first aspect:

after the session management network element establishes QoS flow for the service flow data, the session management network element also needs to allocate bandwidth resources to the service flow data, because the traffic flow in the same QoS flow has the same traffic flow splitting mode, qoS flow information of the QoS flow can be determined according to the QoS parameters of the traffic flow, then bandwidth resources of the first QoS flow are determined according to the QoS flow information and the traffic flow splitting mode, and if the session management network element establishes two QoS flows, bandwidth resources of the first QoS flow and the second QoS flow need to be determined. The QoS flow information includes guaranteed flow bit rates GFBR of the first QoS flow and/or the second QoS flow, and guaranteed bit rates GBR of each service flow in the QoS flow.

The session management network element determines the bandwidth resource of the first QoS flow and the bandwidth resource of the second QoS flow, so that the service flow can transmit the service flow data in the first access technology according to the first QoS flow and can also transmit the service flow data in the second access technology according to the second QoS flow, and after the resources are reserved in advance, the service flow data can be directly moved from the second network or switched to the first network, so that the switching delay is small.

Based on the second implementation manner of the first aspect, the present application provides a third implementation manner of the first aspect:

the shunting modes of the service flow are various, and when the session management network element converges QoS flows with the same shunting mode, resources can be jointly allocated to the QoS flows; when the QoS flow distribution mode is a priority-based distribution mode, a session management network element needs to determine a priority, preferentially allocate a first bandwidth resource to a QoS flow of a high-priority access technology, and then allocate a second bandwidth resource to a QoS flow of a low-priority access technology, because the transmission of a GBR service flow needs to guarantee a bandwidth, the sum of the first bandwidth resource and the second bandwidth resource allocated to the QoS flow of the GBR service flow cannot be smaller than a GFBR, where the QoS flow information further includes a maximum flow bandwidth MFBR, and optionally, the sum of the first bandwidth resource and the second bandwidth resource may also be not greater than the MFBR.

In the shunting mode, first bandwidth resources are allocated to a QoS flow corresponding to an access technology with a high priority, and then second bandwidth resources are allocated to a QoS flow corresponding to an access technology with a low priority, so that the bandwidth of service flow data in the access technology with the high priority can be guaranteed.

Based on the third implementation manner of the first aspect, the present application provides an example of the fourth implementation manner of the first aspect:

in the foregoing offloading mode based on priority, an optional scheme is that resource allocation further needs to be performed according to a network condition of an access network corresponding to an access technology, and a session management network element may obtain a current available bandwidth value in a high-priority access technology, and then allocate a first bandwidth resource to the session management network element according to the current available bandwidth value, where a guaranteed bandwidth value of the allocated first bandwidth resource is the same as the current available bandwidth value; and then adjusting the bandwidth value of the second bandwidth resource according to the guaranteed bandwidth value of the first bandwidth resource, so that the guaranteed bandwidth of the second bandwidth resource is not less than the guaranteed flow bandwidth of the QoS flow.

In the embodiment of the application, when the session management network element allocates the bandwidth resources for the QoS flows, the guaranteed bandwidth values of the two QoS flows are adjusted at any time according to the feedback of the access network, so that the stable transmission of the service flow can be guaranteed, the transmission of the service flow is prevented from being influenced by occupied bandwidth resources, and the transmission efficiency is improved.

Based on the second implementation manner of the first aspect, an embodiment of the present application further provides a fifth implementation manner of the first aspect:

if the QoS flow distribution mode is a master-slave distribution mode, the session management network element needs to determine, according to the distribution mode, master-slave relationships of access technologies corresponding to the first QoS flow and the second QoS flow, respectively; and then, firstly, bandwidth resource allocation is carried out on the first QoS flow corresponding to the main access technology, and optionally, the allocated bandwidth resource is not less than the guarantee flow bandwidth GFBR.

The embodiment of the application provides a feasible scheme for allocating first bandwidth resources and allocating second bandwidth resources, in the shunting mode, the first bandwidth resources are allocated for a first QoS flow corresponding to a main access technology, and the allocated bandwidth resources are not less than a guaranteed flow bandwidth GFBR, so that the bandwidth of service flow data in the main access technology can be guaranteed.

Based on the fifth implementation manner of the first aspect, the present application provides a sixth implementation manner of the first aspect:

in the master-slave mode, the allocation of bandwidth resources also needs to be adjusted according to the network condition of the access technology, when a first bandwidth resource corresponding to the master access technology is occupied, the session management network element needs to allocate a second bandwidth resource to the slave access technology in order to guarantee normal transmission of a service stream, wherein a guaranteed bandwidth value of the allocated second bandwidth resource cannot be smaller than the GFBR.

The session management network element firstly allocates resources in the access technology corresponding to the master access technology, and when the first bandwidth resource corresponding to the master access technology is found to be occupied, the resources need to be allocated in the slave access technology, so that normal switching or moving of the service flow can be ensured, the influence on transmission of the service flow caused by the occupied bandwidth resource is avoided, and the reliability of data transmission is improved.

Based on the fifth implementation manner of the first aspect, the present application provides a seventh implementation manner of the first aspect:

if the first indication information of the service flow received by the session management network element further includes a multiple access indication, in the master-slave mode, the session management network element needs to allocate resources for both the first QoS flow and the second QoS flow, where the multiple access indication is used to indicate that the session management network element allocates resources in both the first access technology and the second access technology, so that the same resources need to be allocated to both the first QoS flow and the second QoS flow.

In the embodiment of the present application, since the first indication information of the service flow has the multiple access indications, even if the first bandwidth resource of the first QoS flow is not occupied, the second bandwidth resource needs to be allocated to the second QoS flow, so that the service flow is switched or moved in two access technologies, and bandwidth resource guarantee is provided, thereby improving the reliability of data transmission.

Based on the second implementation manner of the first aspect, the present application provides an eighth implementation manner of the first aspect:

when the offloading mode is the minimum round-trip time offloading mode, the session management network element needs to allocate the same bandwidth resource to the first QoS flow and the second QoS flow, so that the session management network element allocates the first bandwidth resource to the first QoS flow and allocates the second bandwidth resource to the second QoS flow, the first bandwidth resource is the same as the second bandwidth resource, and the guaranteed bandwidth values of the first bandwidth resource and the second bandwidth resource are not less than the GFBR.

Because the minimum round trip time distribution mode requires that the service flow always uses the access network corresponding to the link with the minimum RTT to transmit the service flow, the embodiment of the application reserves enough bandwidth resources in advance in both access technologies, so that the rapid switching of the service flow can be ensured.

Based on the second implementation manner of the first aspect, the present application provides a ninth implementation manner of the first aspect:

when the shunting mode of the QoS flow is a load balancing shunting mode, a session management network element needs to determine a shunting proportion of the QoS flow, determine guaranteed bandwidth values to be allocated in two access technologies according to a GFBR and the shunting proportion of the QoS flow, that is, calculate through the GFBR and the shunting proportion, determine a first reference value for allocating bandwidth resources in a first access technology and a second reference value for allocating bandwidth resources in a second access technology, allocate resources for the QoS flow according to the first reference value and the second reference value, and allocate first bandwidth resources for the first QoS flow, wherein the guaranteed bandwidth values of the first bandwidth resources need to be greater than the first reference value; allocating a second bandwidth resource for the second QoS flow, wherein the guaranteed bandwidth value of the second bandwidth resource is greater than a second reference value; optionally, a sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not greater than the maximum stream bandwidth MFBR.

The embodiment of the application provides a feasible scheme for allocating a first bandwidth resource and a second bandwidth resource, in the scheme, a guaranteed bandwidth value in the first resource and a guaranteed bandwidth value in the second resource are configured respectively, so that bandwidths of service flow data in a first access technology and a second access technology can be guaranteed.

Based on the ninth implementation manner of the first aspect, the present application provides a tenth implementation manner of the first aspect:

in the load balancing offload mode, the session management network element still needs to perform resource allocation according to a network condition of an access network corresponding to an access technology, and the session management network element needs to obtain a first current available bandwidth value corresponding to the first QoS flow and a second current available bandwidth value corresponding to the second QoS flow, configure the guaranteed bandwidth value of the first bandwidth resource as the first current available bandwidth value, and configure the guaranteed bandwidth value of the second bandwidth resource as the second current available bandwidth value.

In the scheme, the guaranteed bandwidth value in the first resource and the guaranteed bandwidth value in the second resource are configured according to the network condition of an access network corresponding to the access technology, so that the bandwidths of the service flow data in the first access technology and the second access technology can be guaranteed.

Based on any one of the first aspect through the tenth implementation manner of the first aspect, examples of the present application further provide an eleventh implementation manner of the first aspect:

the session management network element may further receive second indication information of a second service flow, where the second indication information also includes a splitting mode of the second service flow, and if the session management network element determines that the splitting mode of the second service flow is the same as the splitting mode of the first service flow, the session management network element binds the second service flow to a QoS flow established by the session management network element for the first service flow.

According to the embodiment of the application, a plurality of service flows in the same shunting mode can be bound into the common QoS flow, then the resource allocation is carried out on the service flows together, the QoS flow does not need to be reestablished for each service flow, and meanwhile, as the shunting modes of the service flows bound together are the same, the bandwidth resource allocation of the session management network element is facilitated.

Based on any one of the first aspect to the eleventh implementation manner of the first aspect, the present application provides also an embodiment of the twelfth implementation manner of the first aspect:

the first indication information and/or the second indication information acquired by the session management network element have multiple access indications, and the multiple access indications indicate that the session management network element allocates resources in both access technologies.

In the solution provided in the embodiment of the present application, qoS flow needs to be established according to a multi-access indication, where the multi-access indication is used to indicate a session management network element to allocate resources for both QoS flows, and the session management network element may divide the resources based on the multi-access indication, so that service flow data can move in two access technologies conveniently.

Based on the twelfth implementation manner of the first aspect, an embodiment of the present application further provides a thirteenth implementation manner of the first aspect:

after obtaining the second indication information of the second service flow, the session management network element judges the first indication information of the first service flow and the second indication information of the second service flow, if both the two indication information contain multiple access indications, the two indication information are bound in one QoS flow, and if the first indication information contains multiple access indications, the second indication information does not contain multiple access indications, or the second indication information contains multiple access indications, and the first indication information does not contain multiple access indications, the first service flow and the second service flow need to be bound in different QoS flows.

In the scheme, if one of two service flows has a multi-access indication and the other does not have the multi-access indication, then the two service flows need to be bound into different QoS flows.

Based on any one of the first implementation manner of the first aspect to the thirteenth implementation manner of the first aspect, embodiments of the present application further provide the thirteenth implementation manner of the first aspect:

the first QoS flow and the second QoS flow established by the session management network element are the same QoS flow; in this scenario, the first access technology is a first data channel of the QoS flow, the second access technology is a second data channel of the QoS flow, that is, one QoS flow corresponds to two data channels, and then the session management network element allocates bandwidth resources to the QoS flow in the two data channels.

In the embodiment of the application, the session management network element only needs to establish one QoS flow, apply the QoS flow to the two data channels, and allocate resources to the two data channels, so that the operation of establishing the QoS flow is reduced, and the efficiency is improved.

A second aspect of the embodiments of the present application provides a method for data transmission, including:

a user plane network element receives service flow information sent by a session management network element, wherein the service flow information comprises a shunting mode of the service flow and QoS (quality of service) flow bandwidth resource information of the service flow, and the service flow is a GBR (guaranteed bit rate) service flow;

and the user plane network element transmits the service flow according to the shunting mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs.

Based on the second aspect, the embodiments of the present application further provide a first implementation manner of the second aspect:

the bandwidth resource information of the QoS flow comprises information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is the QoS flow established through a first access technology, and the second QoS flow is the QoS flow established through a second access technology; the user plane network element transmits the service flow according to the shunting mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs, and the method comprises the following steps:

the user plane network element determines a transmission channel for transmitting the service flow according to the shunting mode;

and the user plane network element transmits the service flow on the determined transmission channel.

Based on the first implementation manner of the second aspect, the present application provides a second implementation manner of the second aspect:

the transmission channel of the service flow comprises a first transmission channel and a second transmission channel, wherein the first transmission channel is used for transmitting the service flow belonging to the first QoS flow, and the second transmission channel is used for transmitting the service flow belonging to the second QoS flow; the bandwidth resource information includes bandwidth resources of the first transmission channel and bandwidth resources of the second transmission channel.

Based on the second implementation manner of the second aspect, the present application provides a third implementation manner of the second aspect:

when the traffic flow distribution mode is a priority-based distribution mode, the user plane network element needs to determine the priority according to the distribution mode; the user plane network element firstly determines a transmission channel of QoS flow corresponding to a high priority access technology as a transmission channel for transmitting service flow, then determines a first bandwidth resource on the transmission channel, and finally transmits the service flow on the transmission channel corresponding to the first priority by using the first bandwidth resource.

Because the session management network element allocates resources to the QoS flow corresponding to the service flow in both transmission channels, when the user plane network element performs data transmission, the data channel with high priority is selected for transmission first, and when the first bandwidth resource can ensure the normal transmission of the GBR service flow, the resource of the data channel with low priority does not need to be utilized.

Based on the third implementation manner of the second aspect, the present application provides a fourth implementation manner of the second aspect:

in the shunting mode based on the priority, the user plane network element needs to transmit the service flow on the transmission channel with the high priority, but when the first bandwidth resource of the transmission channel with the high priority is occupied, the user plane network element needs to determine the second bandwidth resource of the transmission channel corresponding to the second priority; and then, the second bandwidth resource is adopted to transmit the service flow on the transmission channel corresponding to the second priority.

The session management network element allocates resources to the QoS flow corresponding to the service flow in both transmission channels, and when the user plane network element performs data transmission, the bandwidth resource of the data channel with high priority is occupied, and the service flow data is moved or switched to the side with low priority, so that the transmission of GBR service flow can be guaranteed.

Based on the second implementation manner of the second aspect, the present application provides a fifth implementation manner of the second aspect:

when the traffic flow distribution mode is a master-slave distribution mode, the user plane network element needs to determine the master-slave relationship of the access technologies corresponding to the two QoS flows according to the distribution mode; the user plane network element firstly determines a transmission channel of QoS flow corresponding to a main access technology as a transmission channel for transmitting the service flow, then determines a first bandwidth resource on the transmission channel, and finally transmits the service flow on the transmission channel corresponding to the first priority by using the first bandwidth resource.

Because the session management network element allocates resources to the QoS flow corresponding to the service flow in both transmission channels, when the user plane network element performs data transmission, the data channel corresponding to the master QoS flow is selected for transmission, and when the first bandwidth resource can ensure the normal transmission of the GBR service flow, the resource of the data channel of the slave QoS flow does not need to be utilized.

Based on the fifth implementation manner of the second aspect, the present application provides a sixth implementation manner of the second aspect:

in the master-slave shunting mode, a user plane network element needs to transmit service flow on a transmission channel corresponding to a master access technology, but when a first bandwidth resource of the transmission channel corresponding to the master access technology is occupied, the user plane network element needs to determine a second bandwidth resource of the transmission channel corresponding to a slave access technology; and then transmitting the service flow on a transmission channel corresponding to the slave access technology by adopting the second bandwidth resource.

And when the user plane network element performs data transmission, the bandwidth resource of the data channel corresponding to the main access technology is occupied, and the service flow data is moved or switched to one side of the slave access technology, so that the transmission of the GBR service flow can be ensured.

A third aspect of an embodiment of the present application provides a session management network element, including:

an obtaining unit, configured to obtain first indication information of a first service flow, where the first indication information includes a split mode of the first service flow, and the first service flow is a guaranteed bit rate GBR service flow;

and the processing unit is used for establishing a first QoS flow and/or a second QoS flow for transmitting the first service flow according to the first indication information.

Based on the third aspect, the embodiments of the present application further provide a first implementation manner of the third aspect:

the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is a QoS flow established through a second access technology.

Based on the first implementation manner of the third aspect, the present application provides a second implementation manner of the third aspect:

the session management network element further comprises a determining unit and an allocating unit, wherein the determining unit is configured to determine the bandwidth resource of the first QoS flow according to the traffic flow splitting mode and the QoS flow information, and/or determine the bandwidth resource of the first QoS flow according to the traffic flow splitting mode and the QoS flow information

And determining bandwidth resources of the second QoS flow according to the traffic flow distribution mode and the QoS flow information, wherein the QoS flow information comprises guaranteed flow bit rate GFBR of the first QoS flow and/or the second QoS flow and/or guaranteed bit rate GBR of the traffic flow in the QoS flow.

Based on the second implementation manner of the third aspect, the present application provides a third implementation manner of the third aspect:

the offloading mode is a priority-based offloading mode, and the QoS flow information further includes maximum flow bitrates MFBRs of the first QoS flow and the second QoS flow;

the determining unit is configured to determine that a first bandwidth resource is preferentially allocated on a first QoS flow, and a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

The allocating unit is configured to allocate a second bandwidth resource to the second QoS flow when the guaranteed bandwidth value of the first bandwidth resource is less than a guaranteed stream bit rate GFBR, where a sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR or not more than the MFBR.

Based on the third implementation manner of the third aspect, the present application provides a fourth implementation manner of the third aspect:

the acquiring unit is further configured to acquire a current available bandwidth value corresponding to the QoS flow of the first priority;

the allocating unit is specifically configured to allocate the first bandwidth resource according to the current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the current available bandwidth value.

Based on the second implementation manner of the third aspect, the present application provides a fifth implementation manner of the third aspect:

when the offloading mode is a master-slave offloading mode, the allocating unit is specifically configured to allocate a first bandwidth resource to the first QoS flow according to the offloading mode, where a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

Based on the fifth implementation manner of the third aspect, the present application provides a sixth implementation manner of the third aspect:

the allocating unit is further configured to allocate a second bandwidth resource to the second QoS flow when the first bandwidth resource corresponding to the first QoS flow is unavailable, where a guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR.

Based on the fifth implementation manner of the third aspect, the present application provides a seventh implementation manner of the third aspect:

the first indication information further comprises a multiple access indication; the multiple access indication is used to instruct the session management network element to allocate bandwidth resources in both the first access technology and the second access technology;

the allocating unit is further configured to allocate a second bandwidth resource to the second QoS flow according to the multiple access indication, where a guaranteed bandwidth value of the first bandwidth resource is the same as a guaranteed bandwidth value of the second bandwidth resource.

Based on the second implementation manner of the third aspect, the present application provides an eighth implementation manner of the third aspect:

the distribution mode is a minimum round trip time distribution mode, and the allocation unit is specifically configured to allocate a first bandwidth resource to the first QoS flow and allocate a second bandwidth resource to the second QoS flow;

the guaranteed bandwidth value of the first bandwidth resource is the same as the guaranteed bandwidth value of the second bandwidth resource; and the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource are not less than the GFBR.

Based on the second implementation manner of the third aspect, the present application provides a ninth implementation manner of the third aspect:

the shunting mode is a load balancing shunting mode, and the QoS flow information further comprises Maximum Flow Bandwidth Resources (MFBR) of the first QoS flow and the second QoS flow; the determining unit is specifically configured to determine a shunting proportion according to the load balancing shunting mode, and determine a first reference value and a second reference value according to the guaranteed stream bandwidth GFBR and the shunting proportion;

the allocating unit is specifically configured to allocate a first bandwidth resource to the first QoS flow, where a guaranteed bandwidth value of the first bandwidth resource is not less than the first reference value, and allocate a second bandwidth resource to the second QoS flow, where a guaranteed bandwidth value of the second bandwidth resource is not less than the second reference value;

wherein a sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not less than a guaranteed stream bandwidth GFBR or not more than the maximum stream bandwidth MFBR.

Based on the ninth implementation manner of the third aspect, the present application provides a tenth implementation manner of the third aspect:

the acquiring unit is further configured to acquire a first current available bandwidth value of a first access technology corresponding to the first QoS flow and a second current available bandwidth value of a second access technology corresponding to the second QoS flow;

the allocating unit is further configured to allocate the first bandwidth resource according to the first current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the first current available bandwidth value.

The allocating unit is further configured to allocate the second bandwidth resource according to the second current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the second current available bandwidth value.

Based on any one of the third to tenth implementation manners of the third aspect, examples of the present application further provide an eleventh implementation manner of the third aspect:

the acquiring unit is further configured to acquire second indication information of a second service flow, where the second indication information includes a split mode of the second service flow;

the processing unit is further configured to bind the first service flow and the second service flow to the established QoS flow if the splitting mode of the first service flow is the same as the splitting mode of the second service flow.

Based on any one of the third to eleventh implementation manners of the third aspect, examples of the present application further provide a twelfth implementation manner of the third aspect:

the first indication information and/or the second indication information further comprises a multiple access indication for indicating that the allocation unit allocates bandwidth resources on both the first access technology and the second access technology.

Based on the twelfth implementation manner of the third aspect, the present application provides a thirteenth implementation manner of the third aspect:

the processing unit is further configured to bind the first service flow and the second service flow to different QoS flows when the first indication information or the second indication information does not include the multiple access indication.

Based on any one of the first implementation manner of the third aspect to the thirteenth implementation manner of the third aspect, examples of the present application further provide a fourteenth implementation manner of the third aspect:

the first QoS flow and the first QoS flow are the same QoS flow; the first QoS flow and the second QoS flow have the same QoS flow identification QFI.

A fourth aspect of the embodiments of the present application provides a user plane network element:

a receiving unit, configured to receive service flow information sent by a session management network element, where the service flow information includes a split mode of the service flow and QoS flow bandwidth resource information of a quality of service flow to which the service flow belongs, and the service flow is a GBR service flow;

and the sending unit is used for transmitting the service flow according to the shunting mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs.

Based on the fourth aspect, the embodiments of the present application further provide the first implementation manner of the fourth aspect:

the bandwidth resource information of the QoS flow comprises information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is the QoS flow established through a first access technology, and the second QoS flow is the QoS flow established through a second access technology; the user plane network element further comprises a determining unit;

the determining unit is specifically configured to determine, according to the splitting mode, a transmission channel for transmitting the service stream;

the sending unit is specifically configured to transmit the service flow on the determined transmission channel.

Based on the first implementation manner of the fourth aspect, the present application provides a second implementation manner of the fourth aspect:

the transmission channels of the service flows comprise a first transmission channel and a second transmission channel, wherein the first transmission channel is used for transmitting the service flows belonging to the first QoS flow, and the second transmission channel is used for transmitting the service flows belonging to the second QoS flow; the bandwidth resource information includes bandwidth resources of the first transmission channel and bandwidth resources of the second transmission channel.

Based on the second implementation manner of the fourth aspect, the present application provides a third implementation manner of the fourth aspect:

when the offloading mode is a priority-based offloading mode, the determining unit is specifically configured to determine, according to the priority-based offloading mode, priorities of the first QoS flow and an access technology corresponding to the first QoS flow, and determine a transmission channel corresponding to the first priority as a transmission channel for transmitting the service flow, where the priorities include a first priority and a second priority, and the first priority is greater than the second priority;

the determining unit is specifically configured to determine a first bandwidth resource of a transmission channel corresponding to the first priority;

the sending unit is specifically configured to transmit the service flow on the transmission channel corresponding to the first priority by using the first bandwidth resource.

Based on the third implementation manner of the fourth aspect, the present application provides a fourth implementation manner of the fourth aspect:

the determining unit is further configured to determine, when the first bandwidth resource is occupied, a second bandwidth resource of a transmission channel corresponding to the second priority;

the sending unit is specifically configured to transmit the service stream on the transmission channel corresponding to the second priority by using the second bandwidth resource.

Based on the second implementation manner of the fourth aspect, the present application provides a fifth implementation manner of the fourth aspect:

when the offloading mode is a master-slave offloading mode, the determining unit is specifically configured to determine, according to the master-slave offloading mode, a master-slave relationship between access technologies corresponding to the first QoS flow and the second QoS flow;

the determining unit is specifically configured to determine a transmission channel corresponding to the main QoS flow as a transmission channel for transmitting the service flow;

the determining unit is specifically configured to determine a first bandwidth resource of a transmission channel corresponding to the primary QoS flow;

the sending unit is specifically configured to transmit the service flow on a transmission channel corresponding to the main QoS flow by using the first bandwidth resource.

Based on the fifth implementation manner of the fourth aspect, the present application provides a sixth implementation manner of the fourth aspect:

the determining unit is further configured to determine, when the first bandwidth resource is occupied, a second bandwidth resource of a transmission channel corresponding to the slave QoS flow by the user plane network element;

and the sending unit is further configured to transmit the service flow on the transmission channel corresponding to the slave QoS flow by using the second bandwidth resource.

A fifth aspect of the present application provides a session management network element, including: at least one processor and a memory, the memory storing computer-executable instructions executable on the processor, the policy control function network element performing the method according to the first aspect or any one of the possible implementations of the first aspect when the computer-executable instructions are executed by the processor.

A sixth aspect of the present application provides a user plane network element, including: at least one processor and a memory, the memory storing computer-executable instructions executable on the processor, the policy control function network element performing the method according to the second aspect or any one of the possible implementations of the second aspect when the computer-executable instructions are executed by the processor.

A seventh aspect of the present application provides a data transmission system, including: a session management network element device and a policy function device, where the session management network element device is the session management network element described in any one of the possible implementation manners of the third aspect to the third aspect.

An eighth aspect of the present application provides a data transmission system, including: and a user plane network element device, which is the user plane network element device in any one of the possible implementation manners of the fourth aspect to the fourth aspect.

A ninth aspect of embodiments of the present application provides a computer storage medium for storing computer software instructions for a session management network element or a user plane network element as described above, which includes a program for executing the program designed for the session management network element or the user plane network element.

The session management network element may be as described in the aforementioned third aspect.

The user plane network element may be as described in the fourth aspect above.

A tenth aspect of the present application provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform the method for data transmission described in any one of the possible implementation manners of the first aspect to the first aspect;

the communication interface in the chip may be an input/output interface, a pin, a circuit, or the like.

In one possible implementation, the chip or chip system described above in this application further comprises at least one memory having instructions stored therein. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

An eleventh aspect of the present application provides a chip or a chip system, which includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform the method for data transmission described in any one of the second aspect to any one of the possible implementation manners of the second aspect;

A thirteenth aspect of embodiments of the present application provides a computer program product, where the computer program product includes computer software instructions, and the computer software instructions are loadable by a processor to implement a flow in the method for data transmission of any one of the first to second aspects.

Drawings

Fig. 1 is a schematic diagram of a network architecture of a 5G network according to an embodiment of the present application;

fig. 2 is a schematic diagram of another network architecture of a 5G network according to an embodiment of the present application;

fig. 3 is a schematic diagram of another network architecture of a 5G network according to an embodiment of the present application;

fig. 4 is a schematic diagram of another network architecture of a 5G network according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an embodiment of establishing a quality of service flow in an embodiment of the present application;

FIG. 6 is a schematic diagram of an embodiment of allocating resources in an embodiment of the present application;

fig. 7 is a schematic diagram of an embodiment of traffic flow transmission in the embodiment of the present application;

FIG. 8 is a diagram illustrating an embodiment of a method for data transmission according to an embodiment of the present application;

fig. 9 is a schematic diagram of an embodiment of a session management network element according to an embodiment of the present application;

fig. 10 is a schematic diagram of an embodiment of a user plane network element according to an embodiment of the present application;

fig. 11 is a schematic diagram of another embodiment of a session management network element according to an embodiment of the present application;

fig. 12 is a schematic diagram of another embodiment of a user plane network element according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic diagram of a network architecture of a 5G network according to the present application; fig. 2 is a schematic diagram of another network architecture of a 5G network represented by way of a server interface. The core network functions under the 5G network architecture are divided into a user plane network element function (UPF) and a control plane network element function (CP).

The User Equipment (UE), (wireless) access network (radio access network, (R) AN), user Plane Function (UPF) network element and Data Network (DN) in fig. 1 and 2 are generally called as user layer network functions or network elements, and are mainly responsible for forwarding of packet data packets, qoS control, accounting information statistics, and the like, and data traffic of a user may be transmitted through a data transmission channel established between the UE and the DN.

Wherein, the terminal equipment can include: a UE, a handheld terminal, a notebook computer, a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (hand held), a laptop computer (laptop computer), a cordless phone (cordless phone) or a Wireless Local Loop (WLL) station, a Machine Type Communication (MTC) terminal or other device that can access a network. The UE and the access network equipment adopt a certain air interface technology to communicate with each other.

The RAN device is mainly responsible for functions of radio resource management, quality of service (QoS) management, data compression and encryption, and the like on the air interface side. The access network equipment may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example, in a 5G system, referred to as a gNB.

The control plane network element function is mainly responsible for user registration authentication, mobility management, data packet forwarding strategy and QoS control strategy issuing to the user plane and the like, and is used for realizing reliable and stable transmission of user layer flow. The Session Management Function (SMF) is mainly used for user plane network element selection, user plane network element redirection, internet Protocol (IP) address allocation, bearer establishment, modification, release, and the like; an access and mobility management function (AMF) mainly responsible for a signaling processing part, such as functions of access control, mobility management, attach and detach, network element selection, and the like; a Policy Control Function (PCF) network element, which mainly supports providing a unified policy framework to control network behavior, providing policy rules to a control layer network function, and meanwhile, is responsible for acquiring user subscription information related to policy decision. Application Function (AF) network element: the method mainly supports interaction with a 3rd generation partnership project (3 GPP) core network to provide services, such as some services that affect data routing decisions, policy control functions, or provide third parties to the network side. A Network Slice Selection Function (NSSF) network element, which is mainly used for network slice selection. AUSF (authentication server function) network element: mainly providing authentication and authorization functions. Unified Data Management (UDM) may be used for location management and subscription management.

In order to meet the challenge of wireless broadband technology, the 5G network architecture supports not only the wireless technology access core network side defined by the 3GPP standard group, but also the non-3GPP access technology access core network side through a non-3GPP conversion function or a next generation access gateway. As shown in fig. 3, a non-3GPP network architecture is a new non-3GPP interconnection function (non-3 GPP interworking function, n3 iwf) network element compared with a 3GPP system architecture. Including untrusted non-3GPP access network (untrusted non-3GPP access network) devices in the non-3GPP network: the network element allows the UE and the 3GPP core network to use non-3GPP technologies for interconnection and interworking, where the non-3GPP technologies include, for example: wireless fidelity (Wi-Fi), worldwide Interoperability for Microwave Access (WiMAX), code Division Multiple Access (CDMA) network, etc., which can directly access to a 3GPP core network with respect to a trusted non-3GPP access network device, the network element needs to be interconnected and interworked with the 3GPP core network through a secure tunnel established by a secure gateway, wherein the secure gateway is, for example: an evolved packet data gateway (ePDG) or an N3IWF network element.

Meanwhile, the 5G core network can also support credible non-3GPP access or fixed network access; the feasible non-3GPP network includes a trusted wlan network, and the fixed network includes a fixed home network access. The network side architecture is similar to the non-trusted non3GPP access architecture, and the non-trusted non3GPP access gateway is replaced by a trusted WLAN access gateway or a fixed network access gateway.

The 5G network architecture supports establishment of a session of a multiple access protocol data unit PDU, as shown in fig. 4, the UE may access the UPF through multiple access modes, in this embodiment of the present application, an access technology may be any one of a 3GPP access, a non-3GPP access, an LTE access, a 5GRAN access, a trusted non-3GPP access, an untrusted non-3GPP access, a WLAN access, or a fixed access, which is not specifically limited; in the multi-access PDU session, the service flow can select different access technologies for transmission based on the protocol, thereby realizing the shunting of the service flow.

Referring to fig. 5, a schematic diagram of an embodiment of establishing a quality of service flow in an embodiment of the present application is shown. As shown in fig. 5, in a first embodiment of the method for data transmission provided in the embodiment of the present application, establishing a QoS flow for a GBR traffic flow by a session management network element includes:

501. user Equipment (UE) sends a session request to a session management network element;

in this step, the session management network element may refer to a session management function SMF network element, and when the user equipment needs a certain GBR service flow, a session request may be initiated to the core network, where the session request includes a parameter of the first service flow and UE capability indication information.

Specifically, the session request may be a PDU session establishment request initiated by the UE, or may also be a PDU session update request, that is, the UE sends a PDU session examination request or a PDU session modification request message, and the specific form is not limited. The PDU session establishment request and the PDU session update request may be sent to an access and mobility management function AMF network element by an UL NAS TRANSPORT uplink NAS TRANSPORT (UL NAS TRANSPORT) message bearer, and then forwarded to the SMF network element by the AMF network element.

The UE capability indication is a capability representation of a user equipment UE, and is used to represent that the UE has a capability of supporting split transmission of a first GBR traffic flow in a first access technology and a second access technology, and optionally, the UE supports transmission of the first GBR traffic flow in a 3GPP access network and a non-3GPP access network. The UE capability indication information may be carried in the PDU session establishment request, the PDU session update request, or the UL NAS TRANSPORT message, and the specific form is not limited.

The first service flow is a GBR service flow requiring resource reservation in advance by the network side, and for the GBR service flow, the access network needs to reserve bandwidth resources in advance for the GBR service flow to ensure transmission of the first service flow.

502. The session management network element sends a shunting policy request to a policy function network element;

optionally, the policy function network element may be a PCF network element, and when the SMF network element receives the session request forwarded by the AMF network element, the SMF network element generates a offloading policy request according to at least one of a parameter of the first service flow and UE capability indication information included in the session request, where the offloading policy request includes at least one of a parameter of the first service flow and UE capability indication information, and is used to request the policy function network element PCF to determine and issue an offloading policy of the first service flow.

The parameter of the first service flow may be indication information related to the service quality of the first service flow, such as one of a source destination IP address, a source destination port number, a protocol type, an application identifier, and a source destination MAC address, and may further include a type of the first service flow, a requested QoS requirement, and the like, which is not limited specifically; the parameters of the first service flow are used for the second functional network element to determine the QoS parameters of the first service flow.

And the UE capability indication information is used for informing a policy function network element PCF, and the UE supports the establishment of the same QoS flow in both a 3GPP access network and a non-3GPP access network.

503. A strategy function network element determines a quality of service (QoS) parameter of a first service flow;

in this embodiment, when the policy function network element PCF network element receives the offloading policy request sent by the SMF network element, the PCF network element needs to formulate a policy rule related to the first service flow according to at least one of a first service flow parameter and UE capability indication information included in the offloading policy request.

The PCF network element determines a QoS parameter of the first service flow according to a parameter of the first service flow, such as determining a 5G QoS identifier 5QI (5G QoS iidenifier) of the first service flow according to a type or a flow description of the first service flow, determining an Allocation and preemption Priority ARP (Allocation and preemption Priority) according to a service Priority of the first service flow, determining a guaranteed bandwidth GBR value (guaranteed bit) and a Maximum bandwidth MBR (Maximum bit) value according to a quality requirement of the first service flow, or determining the above parameters according to a requested QoS requirement, and the specific form is not limited.

504. The method comprises the steps that a strategy function network element determines first indication information of a first service flow;

wherein the first indication information may include at least one of a QoS parameter, a split mode, and a multi-access indication of the first traffic flow.

Each service flow corresponds to a distribution mode, and the distribution mode may select any one of a priority-based distribution mode, a master-slave distribution mode, a minimum round trip time distribution mode, and a load balancing distribution mode, or may be other types of distribution modes, which is not limited specifically.

When the PCF network element receives the UE capability indication information, it is known that the UE has the capability of supporting the split transmission of the GBR service stream in the first access technology and the second access technology, so that a multi-access indication can be issued to the SMF network element for indicating that the session management network element SMF allocates bandwidth resources in both the first access technology and the second access technology. Illustratively, for some service flows, PCF issues a multi-access indication to SMF; for example, for a service flow a, the PCF issues a flow description of a multi-access indication and the service flow a, and the SMF reserves the same resource for the service flow a in the first access technology and the second access technology at the same time, and optionally, the SMF requests the same guaranteed bandwidth value to the access network device.

The first access technology may be a 3GPP access network, and the second access technology may be a non-3GPP access network; it can be understood that the first access technology may be a non-3GPP access network, and the second access technology may also be a 3GPP access network, which is not limited specifically.

505. The policy function network element sends first indication information to a session management network element;

after determining the first indication information of the first service flow, the PCF network element sends the first indication information of the first service flow to the SMF network element.

506. And the session management network element establishes a first QoS flow and/or a second QoS flow for transmitting the first service flow according to the first indication information.

Under the 5G network architecture, qoS management of data transmission is performed based on QoS flow, and traffic data with similar QoS (e.g. with the same 5QI or ARP parameter) requirements are gathered together and transmitted as QoS flow, so the SMF network element needs to bind the same type of traffic together. For example, the QoS flow may be determined according to the related QoS parameters of the traffic flows, and the traffic flows with similar parameters are bound to one QoS flow.

Since the embodiment needs to establish the corresponding QoS flow for the service flows in both the first access technology and the second access technology, the splitting modes of the service flows bound together need to be consistent, that is, the QoS flow needs to be established according to the splitting mode.

In an alternative embodiment, the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow may be a QoS flow established through a second access technology.

For example, a first QoS flow established by the SMF network element is for a first access technology and a second QoS flow is for a second access technology. The SMF network element may establish a first QoS flow for the first traffic flow, so that the SMF network element may be applied to two access technologies, and may also establish two QoS flows for the first traffic flow, where the first QoS flow corresponds to the first access technology and the second QoS flow corresponds to the second access technology.

In an optional embodiment, a session management network element obtains second indication information of a second service flow, where the second indication information includes a split mode of the second service flow; and if the shunting mode of the first service flow is the same as that of the second service flow, the session management network element binds the first service flow and the second service flow to the established QoS flow.

For example, the SMF network element determines whether the traffic flows are the same type of traffic flows according to the received traffic flow1 and the received traffic flow 2 and according to the 5QI of the traffic flow1 and the traffic flow 2, determines whether the split modes of the traffic flow1 and the traffic flow 2 are the same after the 5QI and arp parameters of the traffic flow1 and the traffic flow 2 are the same, and binds the traffic flow 2 to the QoS flow of the traffic flow1 if the split modes are the same. Optionally, the shunting mode may be determined in advance, and then whether there is a multi-access indication is determined, and finally, whether the 5QI or ARP parameters are the same is determined, and the determination sequence is not limited.

Therefore, a plurality of service flows with the same shunting mode can be bound into a common QoS flow, then resource allocation is carried out on the service flows together, the QoS flow does not need to be reestablished for each service flow, and meanwhile, as the shunting modes of the service flows bound together are the same, bandwidth resources are conveniently allocated to the session management network element.

In an optional implementation manner, whether to bind may be further determined according to a multiple access indication of a second service flow, where the first indication information of the first service flow includes the multiple access indication, and if the second indication information of the second service flow acquired by the session management network element does not include the multiple access indication, the session management network element binds the first service flow and the second service flow to different QoS flows.

If one of the two service flows has a multi-access indication and the other does not have the multi-access indication, the two service flows need to be bound into different QoS flows, and because the session management network element commonly allocates resources through the QoS flows, the service flows need to be bound together in the same mode and have the multi-access indications.

In the technical scheme provided by the application, after receiving first indication information of a service flow, a session management network element establishes a guaranteed bit rate quality of service (GBR QoS) flow according to a splitting mode in the first indication information, and since the session management network element establishes the GBR QoS flow in a first access technology and a second access technology respectively, the service flow data can correspond to the first access technology, the second access technology, or both the first access technology and the second access technology. When the traffic flow data needs to be moved or switched for some reason, it is not necessary to establish GBR QoS flow for the traffic flow again, and the traffic flow data may be directly moved from the first access technology to the second access technology, or may be directly moved from the second access technology to the first access technology, where the moving form may be various, such as transfer, switching, and the like, and thus, the switching delay is small.

In the first embodiment, after establishing the GBR QoS flow for the traffic flow, the session management network element needs to allocate resources to the first QoS flow and the second QoS flow, and a process of allocating resources based on a split mode by the session management network element will be specifically described below.

Referring to fig. 6, a schematic diagram of an embodiment of allocating resources according to the present application is shown. As shown in fig. 6, in a second embodiment of the method for data transmission provided in the embodiment of the present application, allocating resources for GBR QoS flow by a session management network element includes:

601. the session management network element determines the bandwidth resource of the first QoS flow according to the flow distribution mode of the service flow and the QoS flow information;

after the SMF network element establishes the first QoS flow and the second QoS flow, it needs to apply for bandwidth resources from the access technologies on both sides to ensure the transmission of the service flow. Specifically, the SMF network element needs to determine an application method according to a offloading policy, for example, in a offloading mode based on priority, it needs to determine which access network to apply for a resource to first; in the load balancing offload mode, it is necessary to determine how many resources should be applied to each side. Then, according to the determined application strategy, a QoS request can be directly sent to the access network element, and after the access network element receives the QoS request, resources are reserved for the access network element according to the requirements of the SMF network element and the reservation condition is fed back to the SMF network element.

Specifically, the SMF network element determines, through the offload mode and the QoS flow information, a QoS parameter specifically requested by each access technology side, such as a guaranteed bandwidth value of a bandwidth resource, for example, a guaranteed bandwidth value allocated by a specific 3GPP access side or non3GPP access side is determined according to a guaranteed flow bandwidth GFBR in the QoS flow information.

602. And the session management network element determines the bandwidth resource of the second QoS flow according to the traffic flow distribution mode and the QoS flow information.

After the session management network element establishes the second QoS flow for the service flow, it needs to determine the bandwidth resource of the second QoS flow according to the split mode and the guaranteed flow bandwidth GFBR of the second QoS flow. The specific determination method is similar to the determination of the bandwidth resource of the first QoS flow in step 601, and is not described herein again.

603. The session management network element allocates bandwidth resources for the first QoS flow in a first access technology;

after determining the bandwidth resources of the QoS flow, the session management network element allocates the bandwidth resources to the QoS flow in the access technology corresponding to the first QoS flow, and allocates the bandwidth resources to the QoS flow in the access technology corresponding to the second QoS flow. To provide guaranteed bandwidth for GBR traffic flows.

604, the session management network element allocates bandwidth resources for the second QoS flow in a second access technology;

step 604 is similar to step 603, and is described in detail herein, it is understood that step 603 and step 604 do not have a time sequence, and are not limited specifically.

605. The first access technology sends a first current available bandwidth value to a session management network element;

after the session management network element allocates resources in the access technology, different access technologies need to reserve resources according to the network condition of the current access network, and the access network needs to first obtain the current available bandwidth value and feed back the available bandwidth value to the session management network element, so that the session management network element can adjust the allocated resources in time and ensure the normal transmission of service flows.

606. The second access technology sends a second current available bandwidth value to the session management network element;

this step is similar to step 605, that is, the session management network element needs to allocate resources in two access technologies, and each access technology needs to feed back the current available bandwidth value. It is to be understood that steps 604 and 605 are not in a sequential order, and the first access technology may first transmit the first currently available bandwidth value, or the second access technology may first transmit the second currently available bandwidth value, which is not limited in particular.

607. And the session management network element adjusts the bandwidth resources of the first QoS flow and the bandwidth resources of the second QoS flow.

The session management network element may adjust the allocated resource according to the current first available bandwidth value and the second available bandwidth value, so that the session management network element adapts to the network condition of the current access network.

608. The session management network element sends QoS flow bandwidth resource information corresponding to the service flow to the user equipment UE and the user plane network element;

after the session management network element allocates the bandwidth resource, it needs to send the configured QoS flow bandwidth resource information to the UE and the user plane network element, so that the UE and the user plane network element transmit the traffic flow data by using the allocated bandwidth resource information.

In a specific embodiment, when a service flow corresponds to a QoS flow, a session management network element may generate a corresponding relationship between a service flow description and a QoS flow identifier (e.g., identifier QFI1 of a first QoS flow), or/and generate a corresponding relationship between an access technology identifier and a guaranteed bandwidth value; the QoS flow is established on both 3GPP and non3GPP sides. The corresponding relation is used for indicating the UE to select the access technology for the service flow data packet to be transmitted. For example, if the shunting mode indicates that the data packet is transmitted through the 3GPP side and the guaranteed bandwidth value of the first QoS flow at the 3GPP side meets the QoS requirement of the service flow, the UE sends the data packet to the first QoS flow at the 3GPP side for transmission; and if the guaranteed bandwidth resources of the first QoS flow at the 3GPP side cannot meet the QoS requirements of the service flow, the UE sends the data packet to the first QoS flow at the non3GPP side for transmission.

In the following, how to determine and allocate the bandwidth resources of QoS flow in different offloading modes is specifically described.

When the QFI of the first QoS flow is the same as that of the second QoS flow, namely the first QoS flow and the second QoS flow are the same QoS flow, a session management network element determines a guaranteed flow bandwidth GFBR value and a maximum flow bandwidth MFBR value of the Qos flow according to QoS parameters; optionally, the GBR values of all the service flows may be added, and the obtained sum is used as a GFBR value of the guaranteed stream bandwidth; and adding the MBR values of all the service flows to obtain a sum serving as a maximum flow bandwidth MFBR value, or determining a preset difference range, determining a guaranteed flow bandwidth GFBR value according to the sum of the GBR values of all the service flows and the difference range, and determining the maximum flow bandwidth MFBR value according to the sum of the MBR values of all the service flows and the difference range.

In a first optional implementation manner, when the offloading mode is a priority-based offloading mode, a session management network element first determines priorities of a 3GPP access network and the non-3GPP access network; and then applying for a first bandwidth resource at the access network with the first priority, and then applying for a second bandwidth resource at the access network with the second priority, wherein the first priority is greater than the second priority, and the sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR value and not greater than the MFBR value.

In this mode, the service flow is required to transmit the data packet preferentially through the access technology of one side, and when the resource of the side is insufficient, other service data packets are sent through the other side. Therefore, the SMF reserves the guaranteed bandwidth resource on the high priority side first, and reserves the extra bandwidth resource on the low priority side.

Illustratively, when the first access technology indicated by the priority offload mode is high priority, the session management network element allocates a guaranteed bandwidth value GFBR1 of the first bandwidth resource to the first QoS flow based on the priority offload mode, where GFBR1 is a value greater than 0 and less than or equal to GFBR, and then may allocate a guaranteed bandwidth value GFBR2 of the second bandwidth resource to the second QoS flow, where GFBR2 may be greater than or equal to 0 and less than or equal to a value obtained by subtracting a difference value of GFBR1 from MFBR. Wherein the sum of the bandwidth value GFBR1 of the first bandwidth resource and the bandwidth value GFBR2 of the second bandwidth resource is not less than the GFBR or not more than the MFBR.

Illustratively, when the SMF network element determines that the priority of the 3GPP access network is high according to the split mode, it first applies for bandwidth resources to the 3GPP access network, and if the 3GPP access network cannot meet the requirement, it then applies for second bandwidth resources to the non-3GPP access network, as long as it is ensured that the sum of the bandwidth resources reserved on both sides meets the requirement of guaranteeing the stream bandwidth GFBR.

For example, service flow1, service flow 2, and service flow 3 converge to a Qos flow, where the QFI value of the Qos flow is 1; firstly, determining that the GBR value of a service flow1 is 2Mbps, the GBR value of a service flow 2 is 5Mbps, and the GBR value of a service flow 3 is 5Mbps by an SMF network element, adding the GBR values of the service flows to obtain a GFBR value of a Qos flow1 which is 12Mbps; and then, determining that the priority of the 3GPP access network is higher than that of the non-3GPP access network according to the shunting mode, and then the SMF network element firstly applies for bandwidth resources from the 3GPP access network. If the bandwidth resource which can be provided for the Qos flow1 by the 3GPP access network is 6Mbps according to the feedback of the 3GPP access network, the non-3GPP access network at least reserves the bandwidth resource of 6Mbps for the Qos flow 1; if the MFBR value of Qos flow1 is 20Mbps, the non-3GPP access network reserves bandwidth resources of 14Mbps at most for the Qos flow 1.

In a second optional implementation manner, when the offloading mode is a master-slave offloading mode, the session management network element needs to first determine a master-slave relationship between two QoS flows for different access technologies, apply for a first bandwidth resource in an access network corresponding to the master QoS flow, and apply for a second bandwidth resource in an access network corresponding to the slave QoS flow, where a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

Illustratively, when the first access technology indicated by the offloading mode is primary, the session management network element determines, according to the offloading mode, that a guaranteed bandwidth value GFBR1 of a first bandwidth resource allocated to the first QoS flow is not less than GFBR, and a guaranteed bandwidth value GFBR2 of a second bandwidth resource allocated to the second QoS flow is equal to 0 or equal to GFBR. And when the first bandwidth resource corresponding to the first QoS flow is unavailable, the session management network element updates a second bandwidth resource allocated by a second QoS flow, wherein a guaranteed bandwidth value of the updated second bandwidth resource is not less than the GFBR.

And if the first bandwidth resource corresponding to the master QoS flow is unavailable, the session management network element needs to allocate a second bandwidth resource to the slave QoS flow according to feedback of the access network, wherein the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR.

If the service flows in the QoS flow all have multiple access indications, bandwidth resources need to be applied to both the access network corresponding to the master QoS flow and the access network corresponding to the slave QoS flow, and the bandwidth resources applied to both sides need to ensure normal transmission of the service flows, that is, the bandwidth values of the first bandwidth resource and the second bandwidth resource are the same and not less than the guaranteed flow bandwidth.

And in the master-slave flow distribution mode, the service flow is required to be transmitted through one side preferentially, and when one side is unavailable, the service flow is switched to the other side for transmission integrally, so that the SMF network element needs to reserve sufficient resources in the access network corresponding to the master QoS flow to ensure the normal transmission of the service flow, and when the access network corresponding to the master QoS flow cannot provide corresponding bandwidth resources, the bandwidth resources need to be reserved in the slave QoS flow to ensure the rapid switching of the service flow.

For example, service flow1, service flow 2, and service flow 3 converge to a Qos flow, where the QFI value of the Qos flow is 1; firstly, the SMF network element determines that the GFBR value of Qos flow1 is 12Mbps and the MFBR value is 20Mbps; and then the SMF network element needs to judge the master-slave relationship between the 3GPP access network and the non-3GPP access network, and if the 3GPP access network is the access network corresponding to the main Qos flow, the first bandwidth resource provided by the SMF network element for the 3GPP access network in the 3GPP access network is between 12Mbps and 20 Mbps.

If it is known from the feedback of the 3GPP access network that the first bandwidth resource corresponding to the 3GPP access network is already occupied, bandwidth resources need to be allocated in the non-3GPP access network, and the second bandwidth resource provided by the SMF network element in the non-3GPP access network should also be between 12Mbps and 20Mbps, so as to ensure the complete switching of the service flows.

If there is a multi-access indication in the indication information of the service flow in Qos flow1, resources need to be reserved in both the 3GPP access network and the non-3GPP access network, and the resources reserved on both sides are the same and are all between 12Mbps and 20 Mbps.

In a third embodiment, when the offloading mode is the minimum round-trip time offloading mode, the session management network element allocates a first bandwidth resource in the 3GPP access network and allocates a second bandwidth resource in the non-3GPP access network; the guaranteed bandwidth value of the first bandwidth resource is the same as the guaranteed bandwidth value of the second bandwidth resource; and the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource are not less than the GFBR value and not more than the MFBR value.

And a minimum round trip time distribution mode, wherein the mode requires that the service flow always uses the access network corresponding to the link with the minimum RTT to transmit the service flow. Therefore, the SMF network element needs to reserve the same bandwidth resource in the 3GPP access network and the non-3GPP access network, so as to ensure fast switching of the service flow.

In a fourth embodiment, when the offloading mode is a load balancing offloading mode, the session management network element determines an offloading proportion of a service flow first; then, determining a first reference value and a second reference value according to the GFBR value and the shunt ratio of the guaranteed stream bandwidth; a session management network element allocates a first bandwidth resource in a 3GPP access network, wherein a guaranteed bandwidth value of the first bandwidth resource is greater than a first reference value; a session management network element allocates a second bandwidth resource in a non-3GPP access network, wherein a guaranteed bandwidth value of the second bandwidth resource is greater than the second reference value; wherein a sum of a guaranteed bandwidth value of the first bandwidth resource and a guaranteed bandwidth value of the second bandwidth resource is not greater than the maximum stream bandwidth MFBR value.

In the load balancing and shunting mode, the service flow is required to be simultaneously transmitted in the 3GPP access network and the non-3GPP access network according to the proportion, so that the SMF network element needs to allocate corresponding bandwidth resources on both sides based on the shunting proportion to ensure the normal transmission of the service flow.

For example, in the QoS flow after service flow aggregation, the offloading proportions of all service flows are the same, and the offloading mode of each service flow indicates that the offloading ratio of the 3GPP access network to the non-3GPP access network is 1:4; then, the SMF network element first determines that the GFBR value of the QoS flow is 10Mbps, and then calculates that at least 2Mbps of bandwidth resources need to be reserved in the 3GPP access network, and at least 8Mbps of bandwidth resources need to be reserved on the non-3GPP side.

If the split ratios of the multiple service flows included in the QoS flow are different, the reserved bandwidth value of each side may be the sum of the bandwidths required by each service flow at that side; specifically, if the QoS flow after service flow aggregation includes service flow1, service flow 2, and service flow 3; the guaranteed bandwidth GBR value of the service flow1 is 10Mbps, and the shunting proportion is 1:4, the guaranteed bandwidth GBR value of the service flow 2 is 12Mbps, and the shunting proportion is 3:1, the guaranteed bandwidth GBR value of the service flow 3 is 9Mbps, and the shunting proportion is 1:2, it can be determined that the GFBR value of the QoS flow is 31Mbps, bandwidth resources 2Mbps are required to be reserved for the service flow1, 9Mbps is reserved for the service flow 2, and 3Mbps is reserved for the service flow 3 in the 3GPP access network; in a non-3GPP access network, bandwidth resources of 8Mbps need to be reserved for a service flow1, 3Mbps needs to be reserved for a service flow 2, and 6Mbps needs to be reserved for a service flow 3; namely, the QoS flow reserves at least 14Mbps bandwidth resource in the 3GPP access network and reserves at least 17Mbps bandwidth resource in the non-3GPP access network.

In the fifth optional implementation, when the service flow1 is bound to two QoS flows, the split mode may also be a redundant transmission indication; the redundant transmission indication is used for indicating SMF, the service flow data needs to be transmitted on two QoS flows at the same time, and the SMF network element can allocate a first bandwidth resource in a 3GPP access network and allocate a second bandwidth resource in a non-3GPP access network according to the redundant transmission indication; the guaranteed bandwidth value of the first bandwidth resource is the same as the guaranteed bandwidth value of the second bandwidth resource; and the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource are not less than the GFBR value.

The split mode of redundant transmission requires the traffic flow to transmit simultaneously in the access networks on both sides. Therefore, the SMF network element needs to reserve the same bandwidth resource in the 3GPP access network and the non-3GPP access network, so as to ensure fast switching of the service flow.

And (II) when the QFIs of the first QoS flow and the second QoS flow are different, namely the first QoS flow and the second QoS flow are not the same QoS flow, the same service flow belongs to two QoS flows, and the service flows contained in the first QoS flow and the second QoS flow are overlapped but not completely the same. For example, the QFI value of the first Qos flow is 1, qos flow1, which is applied to the 3GPP access network and includes service flow1, service flow 2, and service flow 3; the QFI value of the second Qos flow is 2, qos flow 2 is applied to a non-3GPP access network, comprising traffic flow1, traffic flow 4 and traffic flow 5.

For the service flow1, it is bound in different Qos flows, and since the service flows in the Qos flows have the same distribution mode, it may determine the bandwidth resources required by the service flow1, the service flow 2, and the service flow 3 in the 3GPP access network, determine the bandwidth resources required by the service flow1, the service flow 4, and the service flow 5 in the non-3GPP access network, then calculate the GFBR value and the MFBR value of the Qos flow1 and the Qos flow 2, and apply for resource reservation in the corresponding access networks, respectively.

In the technical scheme provided by the application, after receiving first indication information of a service flow, a session management network element establishes a guaranteed bit rate quality of service (GBR QoS) flow according to a splitting mode in the first indication information, and since the session management network element establishes the GBR QoS flow in a first access technology and a second access technology respectively, the service flow data can be transmitted in the first access technology, the second access technology or both the first access technology and the second access technology. When the traffic flow data needs to be moved or switched for some reason, the GBR QoS flow does not need to be established for the traffic flow again, the traffic flow data can be directly moved or switched from the first access technology to the second access technology, or the traffic flow data can be directly moved or switched from the second access technology to the first access technology, so that the switching delay is small.

After the session management network element allocates resources for its GBR QoS flow, bandwidth resource information related to the service flow is sent to the user equipment and the user plane network element, and then the user equipment and the user plane network element transmit the service flow according to the allocated resources, and the process of the user plane network element transmitting the service flow based on the split mode will be specifically described below.

Referring to fig. 7, a schematic diagram of an embodiment of traffic flow transmission in the embodiment of the present application is shown. As shown in fig. 7, in a third embodiment of the method for data transmission provided in the embodiment of the present application, the transmitting, by a user plane network element, traffic flow data includes:

701. the session management network element establishes service flow information;

the SMF network element establishes service flow information according to the allocation condition of bandwidth resources in a 3GPP access network and a non-3GPP access network, wherein the service flow information comprises a shunting mode of the service flow and QoS flow bandwidth resource information of the service flow.

In an optional embodiment, after the SMF element allocates bandwidth resources in the 3GPP access network and the non-3GPP access network, a corresponding relationship among QFI, a transmission tunnel, and a bandwidth value may be generated according to the resource allocation situation of the 3GPP access network and the non-3GPP access network, and then the corresponding relationship is sent to the UPF element, so as to establish a connection between the UPF element and the access network, and perform data transmission; in addition, the correspondence may also be at least one of pairwise parameter correspondence, specifically including a correspondence between QFI and a transmission tunnel, a correspondence between a transmission tunnel and a bandwidth value, and a correspondence between QFI and a bandwidth value.

702. The session management network element sends service flow information to the user plane network element;

the user plane network element may be a user plane function UPF network element, and after the SMF network element establishes the above correspondence, the user plane network element sends the corresponding relationship to an UPF network element that is an execution subject of service stream transmission, and the UPF network element establishes a connection with the access network according to an instruction of the service stream information, and supports service stream data transmission.

703. The user plane network element determines a transmission channel for transmitting the service flow according to the shunting strategy;

after receiving service flow information sent by the SMF network element, the UPF network element determines a first transmission channel corresponding to a first QFI value of a first QoS flow according to a service flow included in the service flow information, a QFI value of the QoS flow and a corresponding relation table of the transmission channel, wherein the first transmission channel is applied to a 3GPP access network; and determining a second transmission channel corresponding to a second QFI value of a second QoS flow, wherein the second transmission channel is applied to the non-3GPP access network.

And simultaneously, selecting a transmission channel for transmitting the service flow according to the shunting mode.

704. The user plane network element transmits the service flow on the determined transmission channel;

when the UPF network element and the access networks on both sides establish a connection, the transmission of the service stream data is started, specifically, the UPF network element further needs to determine a transmission policy according to the offloading policy, that is, which data channel the service stream data packet is transmitted in, or the transmission time on each transmission channel, and then transmit the service stream according to the selected data channel or/and the transmission time.

In another embodiment of the present invention, the user plane network element in step 703 determines a transmission channel for transmitting the service stream according to the split mode, and there are also multiple implementation manners; the UPF needs to determine a transmission mode according to a splitting mode in the splitting policy, determine a transmission channel specifically used for transmitting a service stream in the first transmission channel and the second transmission channel, and then transmit the service stream on the transmission channel.

In a first optional implementation manner, when the offloading mode is a priority-based offloading mode, the user plane network element first determines priorities of the first transmission channel and the second transmission channel; the user plane network element transmits the service flow on a transmission channel corresponding to the first priority; when the transmission channel corresponding to the first priority is occupied (that is, when no more data packets can be transmitted), the user plane network element transmits the service flow on the transmission channel corresponding to the second priority; wherein the first priority is greater than the second priority.

For example, the QFI value of the QoS flow corresponding to the service flow1 is 1, the transmission channels corresponding to the QFI are a tunnel 1 and a tunnel 3, the tunnel 1 is on the 3GPP access network side, and the tunnel 3 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the priority of the 3GPP access network and the priority of the non-3GPP access network are judged according to the shunting mode, when the priority of the 3GPP access network is higher than that of the non-3GPP access network, namely the priority of the tunnel 1 is higher than that of the tunnel 3, the UPF network element transmits the service flow in the tunnel 1, and when the resources of the tunnel 1 are full, the subsequent data of the service flow can be transmitted in the tunnel 3.

For example, service flow1 corresponds to two QoS flows, the transmission channel corresponding to QFI values 1 and 2, QFI1 is tunnel 4, the transmission channel corresponding to QFI2 is tunnel 5, tunnel 4 is on the 3GPP access network side, and tunnel 5 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the priority of the 3GPP access network and the priority of the non-3GPP access network are determined according to the split mode, when the priority of the 3GPP access network is higher than that of the non-3GPP access network, that is, the priority of the tunnel 4 is higher than that of the tunnel 5, the UPF network element transmits the service flow in the tunnel 4 first, and when the resources of the tunnel 4 are occupied, the subsequent data of the service flow can be transmitted in the tunnel 5.

In a second optional implementation manner, when the splitting mode is a master-slave splitting mode, a user plane network element first determines a master-slave relationship between the first transmission channel and the second transmission channel; then the user plane network element transmits the service flow on the main transmission channel; and when the resources of the main transmission channel are unavailable, the user plane network element switches all the service flows to the auxiliary transmission channel for transmission.

For example, the QFI value of the QoS flow corresponding to the service flow1 is 1, the transmission channels corresponding to the QFI are a tunnel 1 and a tunnel 3, the tunnel 1 is on the 3GPP access network side, and the tunnel 3 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the master-slave relationship between the 3GPP access network and the non-3GPP access network is judged according to the shunting mode, when the 3GPP access network is the main access network, namely the tunnel 1 is the main transmission channel, the UPF network element transmits the service flow at the tunnel 1, and when the tunnel 1 resource is unavailable, the UPF network element is switched to the tunnel 3 to transmit the service flow.

For example, service flow1 corresponds to two QoS flows, the QFI values of which are 1 and 2, the transmission channel corresponding to QFI1 is tunnel 4, the transmission channel corresponding to QFI2 is tunnel 5, tunnel 4 is on the 3GPP access network side, and tunnel 5 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the master-slave relationship between the 3GPP access network and the non-3GPP access network is determined according to the split mode, when the 3GPP access network is the master access network, that is, the tunnel 4 is the master transmission channel, then the UPF network element transmits the service flow once in the tunnel 4, and when the tunnel 4 resource is unavailable, all the service flows are switched to the tunnel 5 to transmit the service flow.

In a third optional implementation manner, when the split mode is the minimum round trip time split mode, the user plane network element determines round trip times of the first transmission channel and the second transmission channel; and the user plane network element transmits the service flow on the transmission channel with the minimum round-trip time.

For example, the QFI value of the QoS flow corresponding to the service flow1 is 1, the transmission channels corresponding to the QFI are a tunnel 1 and a tunnel 3, the tunnel 1 is on the 3GPP access network side, and the tunnel 3 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the round trip time of the tunnel 1 and the tunnel 3 is judged according to the split mode, when the round trip time of the tunnel 1 is the minimum, the UPF network element transmits the service flow at the tunnel 1, and when the round trip time of the tunnel 3 is smaller than the round trip time of the tunnel 1, the UPF network element is switched to the tunnel 3 to transmit the service flow.

For example, service flow1 corresponds to two QoS flows, the QFI values of which are 1 and 2, the transmission channel corresponding to QFI1 is tunnel 4, the transmission channel corresponding to QFI2 is tunnel 5, tunnel 4 is on the 3GPP access network side, and tunnel 5 is on the non-3GPP access network side; when the UPF network element transmits the service flow1, the round-trip time of the tunnel 4 and the tunnel 5 is judged according to the split mode, when the round-trip time of the tunnel 4 is the minimum, the UPF network element transmits the service flow at the tunnel 4, and when the round-trip time of the tunnel 5 is smaller than the round-trip time of the tunnel 4, the UPF network element switches to the tunnel 5 to transmit the service flow.

In a fourth optional implementation manner, when the offloading mode is a load balancing offloading mode, the user plane network element transmits the service flows on the first transmission channel and the second transmission channel simultaneously according to the load balancing offloading mode.

In the fifth optional implementation, when the service flow1 is bound to two QoS flows, the split mode may also be a redundant transmission indication; the redundant transmission indication may be a simultaneous transmission indication related to QoS flow, and the user plane network element transmits the same service flow data packet on the first transmission channel and the second transmission channel simultaneously according to the redundant transmission indication;

for example, a service flow1 corresponds to two QoS flows, a transmission channel corresponding to QFI values of 1 and 2, a transmission channel corresponding to QFI1 is a tunnel 4, a transmission channel corresponding to QFI2 is a tunnel 5, the tunnel 4 is on the 3GPP access network side, the tunnel 5 is on the non-3GPP access network side, and a UPF network element transmits the same service flow data packet on the tunnel 4 and the tunnel 5 at the same time according to the received redundant transmission indication.

In the embodiment of the present invention, the session management network element allocates resources to the QoS flow corresponding to the service flow in both transmission channels, and the user plane network element terminal device can both obtain information that the session management network element allocates resources to the GBR QoS flow for the first network and the second network, so as to instruct the user plane network element and the terminal device to switch or move the service flow data corresponding to the GBR QoS flow.

Referring to fig. 8, a schematic diagram of an embodiment of data transmission in the embodiment of the present application is shown. As shown in fig. 8, in a fourth embodiment of the method for data transmission provided in the embodiment of the present application, the method includes:

801. user Equipment (UE) sends a session request to a session management network element;

802. the session management network element sends a shunting policy request to a policy function network element;

it can be understood that step 801 is similar to step 501 in the first embodiment, and step 802 is similar to step 502, which are not repeated herein.

803. A policy function network element determines first indication information of a first service flow;

804. The policy function network element sends first indication information to a session management network element;

Each service flow corresponds to a splitting mode, and the splitting mode may select any one of a priority-based splitting mode, a master-slave splitting mode, a minimum round trip time splitting mode, a load balancing splitting mode, or a redundant transmission mode, and may also be other types of splitting modes, which is not limited specifically.

When the PCF network element receives the UE capability indication information, it is known that the UE has the capability of supporting the split transmission of the GBR service stream in the first access technology and the second access technology, so that a multi-access indication can be issued to the SMF network element for indicating that the session management network element SMF allocates bandwidth resources in both the first access technology and the second access technology. In the embodiment, aiming at some service flows, PCF sends service flow description and multi-access indication to SMF; for example, for service flow a, the PCF issues a multi-access indication and the flow description of service flow a, and the SMF reserves the same bandwidth resources for service flow a in both the first access technology and the second access technology.

805. The session management network element establishes a first QoS flow and a second QoS flow according to the first indication information;

it can be understood that the specific method for establishing the first QoS flow and the second QoS flow in step 805 is similar to the method in step 506 in the first embodiment, and details are not described herein.

806. The session management network element allocates resources for the first QoS flow and the second QoS flow;

after the session management network element establishes the first QoS flow and the second QoS flow, it needs to allocate resources to the session management network element according to the offloading mode and the QoS flow information.

807. The session management network element sends bandwidth resource information of QoS flow to the user equipment and the user plane network element;

after the session management network element allocates the bandwidth resources to the first QoS flow and the second QoS flow, the session management network element needs to notify the user plane network element and the user equipment of the resource allocation situation, so that the session management network element transmits the traffic flow data by using the allocated resources.

Specifically, when a service flow corresponds to two QoS flow, the session management network element may generate a corresponding relationship with two QoS flow identifiers (QFI 1 and QFI 2) according to the service flow description, or/and generate a corresponding relationship between a QoS flow identifier and a guaranteed bandwidth value; the corresponding relation is used for the UE to select QoS flow transmission for the service flow data packet. For example, the split mode indicates that the data packet is transmitted through the 3GPP side, and the guaranteed bandwidth value of the first QoS flow meets the QoS requirement of the service flow, then the UE sends the data packet to the 3GPP side for transmission corresponding to the first QoS flow. Otherwise, when the guaranteed bandwidth value of the first QoS flow cannot meet the QoS requirement of the service flow, the UE sends the data packet to a second QoS flow corresponding to the non3GPP side for transmission.

In addition, the session management network element may further generate a correspondence between the service flow description and two tunnel identifiers (a 3 GPP-side tunnel identifier and a non3 GPP-side tunnel identifier), or/and a correspondence between the tunnel identifiers and guaranteed bandwidth values. And enabling the UPF to select corresponding tunnel transmission for the service flow data packet based on at least one of the split mode and the resource reservation bandwidth value. For example, if the split mode indicates that the data packet is transmitted through 3GPP and the guaranteed bandwidth value of the user plane tunnel on the 3GPP side meets the QoS requirement of the service flow, the UE sends the data packet to the user plane tunnel on the 3GPP side. Otherwise, if the guaranteed bandwidth value of the user plane tunnel at the 3GPP side cannot satisfy the QoS requirement of the service flow, the UE sends the data packet to the user plane tunnel at the non3GPP side.

808. The user plane network element determines a transmission channel for transmitting the service flow according to the bandwidth resource information;

it can be understood that this step is similar to step 703 in the third embodiment, for example, in a priority-based mode, the transmission channel corresponding to the high-priority QoS flow may be determined as the transmission channel for transmitting the service flow, or the transmission channel corresponding to the low priority may be determined as the channel for transmitting the additional data packet of the service flow when the transmission channel corresponding to the high priority is occupied, which is not described in detail herein.

809. The user plane network element transmits the service flow on the determined transmission channel;

when the user plane network element determines a good transmission channel, the allocated bandwidth resource can be used for transmitting the service flow data.

Referring to fig. 9, an embodiment of a session management network element according to an embodiment of the present application is shown. As shown in fig. 8, an embodiment of the present application provides an embodiment of a session management network element, including

An obtaining unit 901, configured to obtain first indication information of a first service flow, where the first indication information includes a split mode of the first service flow, and the first service flow is a guaranteed bandwidth GBR service flow;

a processing unit 902, configured to establish a first quality of service flow QoS flow and/or a second QoS flow for transmitting the first service flow according to the first indication information.

In another embodiment of the network element with a session management function provided in the embodiments of the present application, the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is a QoS flow established through a second access technology.

In another embodiment of the network element with session management function provided in the embodiment of the present application, the session management network element further includes a determining unit 903 and an allocating unit 904, where the determining unit 903 is configured to determine, according to the offloading mode of the service flow and the QoS flow information, a bandwidth resource of the first QoS flow, and/or determine, according to the offloading mode of the service flow and the QoS flow information, a bandwidth resource of the first QoS flow

And determining bandwidth resources of the second QoS flow according to the traffic flow distribution mode and the QoS flow information, wherein the QoS flow information comprises guaranteed flow bandwidth GFBR of the first QoS flow and/or the second QoS flow.

In another embodiment of a network element with a session management function provided in an embodiment of the present application, the offloading mode is a priority-based offloading mode, and the QoS flow information further includes maximum flow bandwidth resources MFBR of the first QoS flow and the second QoS flow;

the determining unit 903 is specifically configured to determine priorities of the first QoS flow and the second QoS flow according to the priority-based offloading mode;

the allocating unit 904 is configured to allocate a first bandwidth resource to a QoS flow of a first priority, and allocate a second bandwidth resource to a QoS flow of a second priority, where the first priority is greater than the second priority, and a sum of a guaranteed bandwidth value of the first bandwidth resource and a guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR and is not greater than the MFBR.

In another embodiment of the network element with a session management function provided in the embodiment of the present application, the obtaining unit 901 is further configured to obtain a current available bandwidth value corresponding to the QoS flow of the first priority;

the allocating unit 904 is specifically configured to allocate the first bandwidth resource according to the current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the current available bandwidth value.

In another embodiment of the network element with a session management function provided in the embodiment of the present application, when the offloading mode is a master-slave offloading mode, the determining unit 903 is specifically configured to determine a master QoS flow and a slave QoS flow in the first QoS flow and the second QoS flow according to the offloading mode;

the allocating unit 904 is specifically configured to allocate a first bandwidth resource to the primary QoS flow, where a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

In another embodiment of the network element with session management function provided in the embodiment of this application, the allocating unit 904 is further configured to, when a first bandwidth resource corresponding to the primary QoS flow is occupied, allocate, by the network element with session management function, a second bandwidth resource to the secondary QoS flow, where a guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR.

In another embodiment of the present application, which provides a session management function network element, the first indication information further includes a multiple access indication; the multiple access indication is used to instruct the session management network element to allocate bandwidth resources in both the first access technology and the second access technology;

the allocating unit 904 is further configured to allocate a second bandwidth resource to the slave QoS flow according to the multiple access indication, where a guaranteed bandwidth value of the first bandwidth resource is the same as a guaranteed bandwidth value of the second bandwidth resource.

In another embodiment of a network element with a session management function provided in the embodiment of the present application, the offloading mode is a minimum round trip time offloading mode, and the allocating unit 904 is specifically configured to allocate a first bandwidth resource to the first QoS flow and allocate a second bandwidth resource to the second QoS flow;

In another embodiment of a network element with a session management function provided in an embodiment of the present application, the offloading mode is a load balancing offloading mode, and the QoS flow information further includes maximum flow bandwidth resources MFBR of the first QoS flow and the second QoS flow; the determining unit 903 is specifically configured to determine a shunting ratio according to the load balancing shunting mode, and determine a first reference value and a second reference value according to the guaranteed stream bandwidth GFBR and the shunting ratio;

the allocating unit 904 is specifically configured to allocate a first bandwidth resource to the first QoS flow, where a guaranteed bandwidth value of the first bandwidth resource is greater than the first reference value, and allocate a second bandwidth resource to the second QoS flow, where a guaranteed bandwidth value of the second bandwidth resource is greater than the second reference value;

wherein a sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not greater than the maximum stream bandwidth MFBR.

In another embodiment of the network element having a session management function provided in this embodiment of the present application, the obtaining unit 901 is further configured to obtain a first current available bandwidth value corresponding to the first QoS flow and a second current available bandwidth value corresponding to the second QoS flow;

the allocating unit 904 is further configured to allocate the first bandwidth resource according to the first current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the first current available bandwidth value.

The allocating unit 904 is further configured to allocate the second bandwidth resource according to the second current available bandwidth value, where a guaranteed bandwidth value of the first bandwidth resource is the same as the second current available bandwidth value.

In another embodiment of the network element with a session management function provided in the embodiment of the present application, the obtaining unit 801 is further configured to obtain second indication information of a second service flow, where the second indication information includes a split mode of the second service flow;

the processing unit 902 is further configured to bind the first service flow and the second service flow to the established QoS flow if the splitting mode of the first service flow is the same as the splitting mode of the second service flow.

In another embodiment of the present application, providing a network element with a session management function, where the first indication information includes a multiple access indication, where the multiple access indication is used to indicate that the session management network element allocates bandwidth resources in both the first access technology and the second access technology, the obtaining unit 901 is further configured to obtain second indication information of a second service flow, where the second indication information includes a split mode of the second service flow;

the processing unit 902 is further configured to, when the second indication information does not include a multiple access indication, bind the first traffic flow and the second traffic flow to different QoS flows.

In another embodiment of the present application, which provides a network element with a session management function, the first QoS flow and the first QoS flow are the same QoS flow.

It should be noted that, for details of the information execution process of the element of the session management network element, reference may be specifically made to the descriptions in the method embodiments shown in fig. 5 and fig. 6 in the present application, and details are not described here again.

Referring to fig. 10, an embodiment of a user plane network element according to the embodiment of the present application is shown. As shown in fig. 10, an embodiment of the present application provides an embodiment of a user plane network element, including

A receiving unit 1001, configured to receive service flow information sent by a session management network element, where the service flow information includes a split mode of the service flow and QoS flow bandwidth resource information of a quality of service flow to which the service flow belongs, and the service flow is a GBR service flow;

a sending unit 1002, configured to transmit the service flow according to the splitting mode of the service flow and bandwidth resource information of the QoS flow to which the service flow belongs.

In another embodiment of the present invention, which provides a user plane network element, bandwidth resource information of QoS flow includes information of a first QoS flow and information of a second QoS flow, where the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is a QoS flow established through a second access technology; the user plane network element further comprises a determining unit 1003;

the determining unit 1003 is specifically configured to determine, according to the offloading mode, a transmission channel for transmitting the service flow;

the sending unit 1002 is specifically configured to transmit the service flow on the determined transmission channel.

In another embodiment of the present invention, a transmission channel of a service flow includes a first transmission channel and a second transmission channel, where the first transmission channel is used to transmit the service flow belonging to the first QoS flow, and the second transmission channel is used to transmit the service flow belonging to the second QoS flow; the bandwidth resource information includes bandwidth resources of the first transmission channel and bandwidth resources of the second transmission channel.

In another embodiment of the user plane network element provided in the embodiment of the present application, when the offloading mode is a priority-based offloading mode, the determining unit 1003 is specifically configured to determine priorities of the first QoS flow and the first QoS flow according to the priority-based offloading mode, and determine a transmission channel corresponding to the first priority as a transmission channel for transmitting the service flow, where the priority includes a first priority and a second priority, and the first priority is greater than the second priority;

the determining unit 1003 is specifically configured to determine a first bandwidth resource of a transmission channel corresponding to the first priority;

the sending unit 1002 is specifically configured to transmit the service flow on the transmission channel corresponding to the first priority by using the first bandwidth resource.

In another embodiment of the user plane network element provided in the embodiment of the present application, the determining unit 1003 is further configured to determine, when the first bandwidth resource is occupied, a second bandwidth resource of a transmission channel corresponding to the second priority;

the sending unit 1002 is specifically configured to transmit the service stream on the transmission channel corresponding to the second priority by using the second bandwidth resource.

In another embodiment of the user plane network element provided in the embodiment of the present application, when the offloading mode is a master-slave offloading mode, the determining unit 1003 is specifically configured to determine a master QoS flow and a slave QoS flow in the first QoS flow and the second QoS flow according to the master-slave offloading mode;

the determining unit 1003 is specifically configured to determine a transmission channel corresponding to the main QoS flow as a transmission channel for transmitting the service flow;

the determining unit 1003 is specifically configured to determine a first bandwidth resource of a transmission channel corresponding to the primary QoS flow;

the sending unit 1002 is specifically configured to transmit the service flow on a transmission channel corresponding to the primary QoS flow by using the first bandwidth resource.

In another embodiment of the user plane network element provided in the embodiment of the present application, the determining unit 1003 is further configured to determine, when the first bandwidth resource is occupied, a second bandwidth resource of a transmission channel corresponding to the slave QoS flow;

the sending unit 1002 is further configured to transmit the service flow on the transmission channel corresponding to the slave QoS flow by using the second bandwidth resource.

Referring to fig. 11, an embodiment of a session management element in an embodiment of the present application may include one or more central processing units 1101, a memory 1102, and a communication interface 1103.

Memory 1102 may be transient storage or persistent storage. Still further, the central processor 1101 may be configured to communicate with the memory 1102 to execute a series of instruction operations in the memory 1102 on the session management function network element.

In this embodiment, the central processing unit 1101 may perform the signal processing operation performed by the session management network element in the embodiments shown in fig. 5 and fig. 6, which is not described herein again specifically.

In this embodiment, the specific functional module division in the central processing unit 1101 may be similar to the functional module division manner of the units such as the obtaining unit, the processing unit, and the determining unit described in fig. 8 and fig. 9, and is not described herein again.

It should be noted that, for details of the information execution process of the central processor 1101 of the session management network element, reference may be specifically made to the descriptions in the method embodiments shown in fig. 5 and fig. 6 in the present application, and details are not described here again.

Referring to fig. 12, an embodiment of a user plane functional network element in the embodiment of the present application may include one or more central processing units 1201, a memory 1202, and a communication interface 1203.

Memory 1202 may be transient storage or persistent storage. Still further, the central processor 1201 may be configured to communicate with the memory 1202 to perform a series of instruction operations in the memory 1202 on the user plane functional network element.

In this embodiment, the central processing unit 1201 may perform the operations performed by the user plane network element in the embodiment shown in fig. 10, which are not described herein again.

In this embodiment, the specific functional module division in the central processing unit 1201 may be similar to the functional module division of the determining unit, the sending unit, and the like described in fig. 10, and is not described herein again.

It should be noted that, for details of the information execution process of the central processing unit 1201 of the session management network element, reference may be specifically made to the description in the method embodiment shown in fig. 7 in the present application, and details are not described here again.

An embodiment of the present application further provides a data transmission system, including: a session management network element device and a policy function device, where the session management network element device is the session management network element described in any possible implementation manner of the embodiment shown in fig. 9.

An embodiment of the present application further provides a data transmission system, including: the user plane network element device is the user plane network element device described in any possible implementation manner of the embodiment shown in fig. 10.

The embodiment of the present application further provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform the method for data transmission described in any one of any possible implementation manners of the embodiments shown in fig. 5 and 6;

The embodiment of the present application further provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform the method for data transmission described in any one of any possible implementation manners of the embodiment shown in fig. 7;

An embodiment of the present application further provides a computer storage medium, where the computer storage medium is used to store computer software instructions for the session management network element and the user plane network element, and the computer storage medium includes a program configured to execute a user plane function network element designed for the session management network element.

The session management network element may be a session management network element as described in the foregoing fig. 9.

The user plane network element may be the user plane network element described in the foregoing fig. 10.

An embodiment of the present application further provides a computer program product, where the computer program product includes computer software instructions, and the computer software instructions may be loaded through a processor to implement a flow in the method for processing a service flow in any one of fig. 5 to 7.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

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

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.

Claims

1. A method of data transmission, the method comprising:

a session management network element acquires a shunting mode of a first service flow, wherein the first service flow is a guaranteed bit rate GBR service flow;

and the session management network element establishes a first QoS flow and/or a second QoS flow for transmitting the first service flow according to the shunting mode of the first service flow.

2. The method of claim 1, wherein the first QoS flow is a QoS flow established through a first access technology, and wherein the second QoS flow is a QoS flow established through a second access technology.

3. The method of claim 2, further comprising:

the session management network element determines the bandwidth resource of the first QoS flow according to the traffic flow distribution mode and the QoS flow information, and/or

And the session management network element determines the bandwidth resource of the second QoS flow according to the traffic flow distribution mode and the QoS flow information, wherein the QoS flow information includes a guaranteed flow bit rate GFBR of the first QoS flow and/or a guaranteed flow bit rate GFBR of the second QoS flow and/or a guaranteed bit rate GBR of the traffic flow in the QoS flow.

4. The method of claim 3, wherein the offload mode is a priority-based offload mode, and wherein the QoS flow information further comprises a maximum flow bitrate MFBR for the first QoS flow and a maximum flow bitrate MFBR for a second QoS flow;

the determining, by the session management network element, the bandwidth resource of the first QoS flow according to the traffic flow splitting mode and the QoS flow information, and/or determining, by the session management network element, the bandwidth resource of the second QoS flow according to the traffic flow splitting mode and the QoS flow information includes:

the session management network element determines to preferentially allocate a first bandwidth resource on a first QoS flow according to the priority-based offload mode, wherein a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR;

or, when the guaranteed bandwidth value of the first bandwidth resource is smaller than a guaranteed flow bit rate GFBR, the session management network element allocates a second bandwidth resource to the second QoS flow, and a sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not smaller than the GFBR or not larger than the MFBR.

5. The method of claim 3, wherein the offloading mode is a master-slave offloading mode, and the determining, by the session management network element, the bandwidth resource of the first QoS flow according to the offloading mode of the traffic flow and QoS flow information and/or the determining, by the session management network element, the bandwidth resource of the second QoS flow according to the offloading mode of the traffic flow and QoS flow information comprises:

and the session management network element allocates a first bandwidth resource to the first QoS flow according to the shunting mode, wherein a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

6. The method as claimed in claim 3, wherein the offloading mode is a minimum round-trip time offloading mode, and the determining, by the session management element, the bandwidth resource of the first QoS flow according to the offloading mode of the traffic flow and QoS flow information and/or the determining, by the session management element, the bandwidth resource of the second QoS flow according to the offloading mode of the traffic flow and QoS flow information comprises:

the session management network element allocates a first bandwidth resource for the first QoS flow and allocates a second bandwidth resource for the second QoS flow;

7. The method of claim 3, wherein the offloading mode is a load balancing offloading mode, and wherein the QoS flow information further comprises a maximum flow bandwidth resource MFBR of the first QoS flow and a maximum flow bandwidth resource MFBR of a second QoS flow; the determining, by the session management network element, the bandwidth resource of the first QoS flow according to the traffic flow splitting pattern and the QoS flow information, and/or determining, by the session management network element, the bandwidth resource of the second QoS flow according to the traffic flow splitting pattern and the QoS flow information, includes:

the session management network element determines a shunting proportion according to the load balancing shunting mode;

the session management network element determines a first reference value and a second reference value according to the guaranteed stream bandwidth GFBR and the distribution ratio;

the session management network element allocates a first bandwidth resource for the first QoS flow, wherein a guaranteed bandwidth value of the first bandwidth resource is not less than the first reference value;

the session management network element allocates a second bandwidth resource for the second QoS flow, wherein a guaranteed bandwidth value of the second bandwidth resource is not less than the second reference value;

and the sum of the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource is not less than the guaranteed flow bandwidth GFBR or not more than the maximum flow bandwidth resource MFBR of the first QoS flow and the maximum flow bandwidth resource MFBR of the second QoS flow.

8. The method according to claim 3, wherein the offloading mode is a redundant transmission offloading mode, the session management element determines the bandwidth resource of the first QoS flow according to the offloading mode of the traffic flow and QoS flow information, and/or the session management element determines the bandwidth resource of the second QoS flow according to the offloading mode of the traffic flow and QoS flow information, including:

the session management network element obtains a redundancy transmission indication, wherein the redundancy transmission indication indicates that the first service flow is transmitted on the first QoS flow and the second QoS flow simultaneously;

the session management network element allocates a first bandwidth resource for the first QoS flow according to the redundant transmission indication;

the session management network element allocates a second bandwidth resource for the second QoS flow according to the redundant transmission indication; the guaranteed bandwidth value of the first bandwidth resource is the same as the guaranteed bandwidth value of the second bandwidth resource; and the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource are not less than the GFBR value.

9. The method according to any one of claims 1 to 8, further comprising:

the session management network element acquires a shunting mode of a second service flow;

and if the shunting mode of the first service flow is the same as that of the second service flow, the session management network element binds the first service flow and the second service flow to the established QoS flow.

10. The method according to any one of claims 1 to 9, further comprising:

the session management network element obtains a multi-access indication, where the multi-access indication is used to indicate that the session management network element allocates bandwidth resources in both the first access technology and the second access technology.

11. A session management network element, comprising:

an obtaining unit, configured to obtain a split mode of a first service flow, where the first service flow is a guaranteed bit rate GBR service flow;

and the processing unit is used for establishing a first QoS flow and/or a second QoS flow for transmitting the first service flow according to the shunting mode of the first service flow.

12. Session management network element according to claim 11, wherein the first QoS flow is a QoS flow established over a first access technology and the second QoS flow is a QoS flow established over a second access technology.

13. The session management NE of claim 12, wherein the session management NE further comprises a determining unit and an allocating unit, and wherein the determining unit is configured to determine the bandwidth resources of the first QoS flow according to the offloading mode of the traffic flows and QoS flow information, and/or wherein the bandwidth resources of the first QoS flow are determined according to the offloading mode of the traffic flows and QoS flow information

And determining bandwidth resources of the second QoS flow according to the traffic flow distribution mode and the QoS flow information, wherein the QoS flow information comprises a guaranteed flow bit rate GFBR of the first QoS flow and/or a guaranteed flow bit rate GFBR of the second QoS flow and/or a guaranteed bit rate GBR of the traffic flow in the QoS flow.

14. The session management network element of claim 13, wherein the offload mode is a priority-based offload mode, and wherein the QoS flow information further comprises a maximum flow bitrate MFBR of the first QoS flow and a maximum flow bitrate MFBR of the second QoS flow;

the determining unit is configured to determine that a first bandwidth resource is preferentially allocated on a first QoS flow, and a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR;

15. The session management network element of claim 14, wherein the offloading mode is a master-slave offloading mode, and the allocating unit is configured to allocate a first bandwidth resource to the first QoS flow according to the offloading mode, where a guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.

16. The session management network element of claim 14, wherein the offload mode is a load balancing offload mode, and wherein the QoS flow information further comprises maximum flow bandwidth resources MFBR of the first QoS flow and the second QoS flow; the determining unit is specifically configured to determine a splitting ratio according to the load balancing splitting mode, and determine a first reference value and a second reference value according to the guaranteed stream bandwidth GFBR and the splitting ratio;

the allocating unit is specifically configured to allocate a first bandwidth resource to the first QoS flow, where a guaranteed bandwidth value of the first bandwidth resource is not less than the first reference value, and allocate a second bandwidth resource to the second QoS flow, where the guaranteed bandwidth value of the second bandwidth resource is not less than the second reference value;

17. The element of session management as claimed in claim 14, wherein the offloading mode is a redundant transmission offloading mode, and the element of session management determines the bandwidth resource of the first QoS flow according to the offloading mode of the traffic flow and QoS flow information, and/or the element of session management determines the bandwidth resource of the second QoS flow according to the offloading mode of the traffic flow and QoS flow information, including:

the obtaining unit is further configured to obtain a redundant transmission indication, where the redundant transmission indication indicates that the first service flow is transmitted on the first QoS flow and the second QoS flow simultaneously;

the allocating unit is specifically configured to allocate a first bandwidth resource to the first QoS flow according to the redundant transmission indication; allocating a second bandwidth resource for the second QoS flow according to the redundant transmission indication; the guaranteed bandwidth value of the first bandwidth resource is the same as the guaranteed bandwidth value of the second bandwidth resource; and the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource are not less than the GFBR value.

18. The session management network element according to any one of claims 11 to 17, wherein the obtaining unit is further configured to obtain second indication information of a second service flow, where the second indication information includes a split mode of the second service flow;

19. A session management network element, comprising: at least one processor, a memory, the memory storing computer-executable instructions executable on the processor, the processor performing the method according to any one of the possible implementations of claims 1 to 10 when the computer-executable instructions are executed by the processor.

20. A data transmission system, comprising: a session management network element device and a policy function device, wherein the session management network element device is the session management network element of any one of the preceding claims 11 to 18.

21. A method of data transmission, the method comprising:

a user plane network element receives service flow information sent by a session management network element, wherein the service flow information comprises a traffic flow distribution mode and QoS flow bandwidth resource information of a quality of service flow to which the service flow belongs, and the service flow is a GBR service flow;

22. The method of claim 21, wherein the bandwidth resource information of the QoS flow comprises information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is the QoS flow established by the first access technology, and the second QoS flow is the QoS flow established by the second access technology; the user plane network element transmits the service flow according to the shunting mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs, and the method comprises the following steps:

and the user plane network element transmits the service flow on the transmission channel.

23. The method of claim 22, wherein the transmission channels of the traffic flow comprise a first transmission channel and a second transmission channel, wherein the first transmission channel is used for transmitting the traffic flow belonging to the first QoS flow, and the second transmission channel is used for transmitting the traffic flow belonging to the second QoS flow; the bandwidth resource information includes bandwidth resources of the first transmission channel and bandwidth resources of the second transmission channel.

24. The method of claim 23, wherein when the offloading mode of the traffic flow is a priority-based offloading mode, the determining, by the user plane network element, a transmission channel for transmitting the traffic flow according to the offloading mode comprises:

the user plane network element determines a first priority of the first transmission channel and a second priority of the second transmission channel according to the shunting mode, wherein the first priority is higher than the second priority;

the user plane network element determines the first transmission channel as a transmission channel for transmitting the service flow;

and the user plane network element determines a first bandwidth resource on the first transmission channel, where the first bandwidth resource is used to transmit the service flow on the first transmission channel.

25. The method of claim 24, further comprising:

when the first bandwidth resource is occupied, the user plane network element determines a second bandwidth resource on a second transmission channel of the second priority;

and the user plane network element transmits the service stream on the second transmission channel by using the second bandwidth resource.

26. The method of claim 23, wherein when the offloading mode of the service flow is a master-slave offloading mode, the determining, by the user plane network element, a transmission channel for transmitting the service flow according to the offloading mode comprises:

the user plane network element determines the master-slave relationship of the access technologies corresponding to the first QoS flow and the second QoS flow according to the split mode, wherein the access technology corresponding to the first QoS flow is a master access technology, and the access technology corresponding to the second QoS flow is a slave access technology;

the user plane network element determines a first transmission channel corresponding to the first QoS flow as a transmission channel for transmitting the service flow;

and the user plane network element determines a first bandwidth resource on the first transmission channel, where the first bandwidth resource is used for transmitting the service flow on the first transmission channel.

27. The method of claim 26, further comprising:

when the first bandwidth resource is occupied, the user plane network element determines a second bandwidth resource of a second transmission channel corresponding to the second QoS flow;

28. A user plane network element, comprising:

29. The user plane network element of claim 28, wherein the bandwidth resource information of the QoS flow comprises information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is the QoS flow established through the first access technology, and the second QoS flow is the QoS flow established through the second access technology; the user plane network element further comprises a determining unit;

30. The user plane network element of claim 29, wherein the transmission channel of the traffic flow comprises a first transmission channel and a second transmission channel, wherein the first transmission channel is used for transmitting the traffic flow belonging to the first QoS flow, and the second transmission channel is used for transmitting the traffic flow belonging to the second QoS flow; the bandwidth resource information includes bandwidth resources of the first transmission channel and bandwidth resources of the second transmission channel.

31. The user plane network element of claim 30, wherein when the offloading mode is a priority-based offloading mode, the determining unit is specifically configured to determine a first priority of the first transmission channel and a second priority of the second transmission channel according to the offloading mode, where the first priority is higher than the second priority; determining the first transmission channel as a transmission channel for transmitting the service flow; determining a first bandwidth resource of a transmission channel corresponding to the first priority, where the first bandwidth resource is used for transmitting the service flow on the first transmission channel.

32. The user plane network element of claim 31, wherein when the first bandwidth resource is occupied, the determining unit is further configured to determine a second bandwidth resource on a second transmission channel of the second priority;

the sending unit is further configured to transmit the service flow on the second transmission channel by using the second bandwidth resource.

33. The user plane network element of claim 30, wherein when the offloading mode of the service flow is a master-slave offloading mode, the determining unit is specifically configured to determine a master-slave relationship between access technologies corresponding to the first QoS flow and the second QoS flow according to the offloading mode, where the access technology corresponding to the first QoS flow is a master access technology, and the access technology corresponding to the second QoS flow is a slave access technology; determining a first transmission channel corresponding to the first QoS flow as a transmission channel for transmitting the service flow; determining a first bandwidth resource on the first transmission channel, wherein the first bandwidth resource is used for transmitting the service flow on the first transmission channel.

34. The user plane network element of claim 33, wherein when the first bandwidth resource is occupied, the determining unit is further configured to determine a second bandwidth resource of a second transmission channel corresponding to the second QoS flow;

35. A user plane network element, comprising: at least one processor, a memory, the memory storing computer-executable instructions executable on the processor, the processor performing the method according to any one of the possible implementations of claims 21 to 27 when the computer-executable instructions are executed by the processor.

36. A data transmission system, comprising: session management network element equipment, policy function equipment, and user plane network element equipment, where the session management network element equipment is the session management network element described in any one of claims 11 to 19, and the user plane network element equipment is the user plane network element equipment described in any one of claims 28 to 34.

37. A computer-readable storage medium storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor performs the method of any of claims 1 to 10 or 21 to 27.

38. A computer program product storing one or more computer executable instructions, wherein when the computer executable instructions are executed by the processor, the processor performs the method of any one of claims 1 to 10 or 21 to 27.