CN115412981A - A data transmission method and related equipment - Google Patents

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

A data transmission method and related equipment

This application is a divisional application, the application number of the original application is 201911093035.3, and the original application date is November 07, 2019. The entire content of the original application is incorporated in this application by reference.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a data transmission method and related equipment.

Background technique

With the continuous development of wireless broadband technology, the 3GPP standard group formulated the 5G network architecture at the end of 2016. This framework not only supports user equipment (UE) to access the core network through wireless access technologies defined by the 3GPP standard group (such as LTE, 5G RAN, etc.), but also supports non-3GPP access technologies (such as untrusted WLAN , fixed network, etc.) to access the core network, and also supports simultaneous access to the core network through 3GPP access technology and non-3GPP access technology; therefore, multiple access protocol data unit PDU sessions can be established under this network architecture.

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

In the prior art, the GBR QoS flow can only be established on one side of the 3GPP side or the non-3GPP side. When the service 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. lead to an increase in delay.

Contents of the invention

The embodiment of the present application provides a data transmission method and related equipment, which are used to reduce the handover delay when service flow data is moved from one side to another.

The first aspect of the embodiments of the present application provides a data transmission method;

The session management network element first needs to obtain the first indication information of the guaranteed bit rate GBR service flow. The first indication information has the offload mode of the service flow, and the session management network element needs to establish the transmission of the service flow according to the first indication information. QoS flow for the first QoS flow, or create two QoS flows.

During the session establishment and session modification process, the session management network element will receive the policy rule of the guaranteed bandwidth GBR service flow sent by the policy control unit, that is, the first indication information. The policy rule includes the service quality parameter and the offload mode of the service flow, The distribution mode can indicate that the service flow is divided in the two networks. Since the QoS management of service flow transmission is based on the service quality flow (QoS flow), the session management network element can establish the first service according to the service flow distribution mode. Quality flow QoS flow, for example, aggregate service flows with the same distribution mode to form a QoS flow, or create two flows for service flows, that is, the first QoS flow and the second QoS flow.

When establishing a QoS flow for a service flow based on the offload mode, the session management network element can directly aggregate the service flow with the same offload mode into the same QoS flow, and establish the QoS flow corresponding to the service flow in advance. When the service flow data is moved or switched between the two networks, there is no need to re-establish a new GBRQoS flow on the other side, and the service flow data can be moved or switched from the first network to the second network directly according to the QoS flow established in advance , it is also possible to directly move or switch service flow data from the second network to the first network, so the handover delay is small, or, when the service flow bandwidth demand is high, it can also be provided by simultaneous transmission of the first network and the second network Sufficient bandwidth resources.

Based on the first aspect, the embodiment of this application also provides the first implementation manner of the first aspect:

When the session management network element establishes the QoS flow, it can establish the first QoS flow through the first access technology. When the session management network element establishes two flows for the service flow, it can establish the first QoS flow based on the distribution mode through the first access technology. The first QoS flow establishes the second QoS flow through the second access technology.

Since the session management network element establishes two QoS flows for the service flow in advance, and each flow corresponds to a different access technology, when the service flow data needs to move between different access technologies, the pre-established QoS flow can be directly applied. With a good QoS flow, the service flow can be switched without re-establishing on the other side, reducing the switching delay.

Based on the first implementation of the first aspect, the embodiment of this application also provides a second implementation of the first aspect:

After the session management network element establishes the QoS flow for the service flow data, the session management network element needs to allocate bandwidth resources for it. Since the service flow in the same QoS flow has the same distribution mode, it can be based on the QoS parameters of the service flow. Determine the QoS flow information of the QoS flow, and then determine the bandwidth resources of the first QoS flow according to the QoS flow information and the offload mode. If the session management network element has established two QoS flows, you need to determine the first QoS flow and the second QoS flow bandwidth resources. Wherein, the QoS flow information includes the guaranteed bit rate GFBR of the first QoS flow and/or the second QoS flow, and the guaranteed bit rate 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 the service flow can transmit service flow data in the first access technology according to the first QoS flow, or can transmit service flow data according to the second QoS flow The service flow data is transmitted in the second access technology, so that after resources are reserved in advance, the service flow data can be directly moved or switched from the second network to the first network, so the switching delay is relatively small.

Based on the second implementation manner of the first aspect, the embodiment of this application also provides a third implementation manner of the first aspect:

There are various distribution modes of service flows. When the session management network element gathers QoS flows with the same distribution mode together, they can jointly allocate resources for them; when the distribution mode of QoS flow is priority-based distribution mode, The session management network element needs to determine the priority first, and allocate the first bandwidth resource to the QoS flow of the high-priority access technology first, and then allocate the second bandwidth resource to the QoS flow of the low-priority access technology. The transmission needs to guarantee the bandwidth, so the sum of the first bandwidth resource and the second bandwidth resource allocated for the QoS flow cannot be less than GFBR, wherein, the QoS flow information also includes the maximum flow bandwidth MFBR, and optionally, the first bandwidth resource and the second bandwidth resource The sum of the two bandwidth resources may also not be greater than the MFBR.

The embodiment of the present application provides a feasible scheme for allocating the first bandwidth resources and allocating the second bandwidth resources. The QoS flow corresponding to the low-priority access technology allocates the second bandwidth resource, so that the bandwidth of the service flow data in the high-priority access technology can be guaranteed.

Based on the third implementation manner of the first aspect, the embodiment of this application also provides a fourth implementation manner of the first aspect:

In the above priority-based offload mode, an optional solution is to allocate resources according to the network conditions of the access network corresponding to the access technology, and the session management network element can obtain the high-priority access technology The current available bandwidth value, and then according to the current available bandwidth value, allocate the first bandwidth resource for it, wherein, the guaranteed bandwidth value of the allocated first bandwidth resource is the same as the current available bandwidth value; and then according to the guaranteed bandwidth value of the first bandwidth resource The bandwidth value of the second bandwidth resource can be adjusted to ensure that it is not less than the guaranteed flow bandwidth of the QoS flow.

In this application embodiment, when the session management network element allocates bandwidth resources for QoS flows, it adjusts the guaranteed bandwidth values of the two QoS flows at any time according to the feedback from the access network. In this way, the stable transmission of service flows can be guaranteed, avoiding Because bandwidth resources are occupied, the transmission of its service flow is affected, and the transmission efficiency is improved.

Based on the second implementation manner of the first aspect, the embodiment of this application also provides a fifth implementation manner of the first aspect:

If the flow distribution mode of the QoS flow is the master-slave distribution mode, the session management network element needs to judge the master-slave relationship of the access technologies corresponding to the first QoS flow and the second QoS flow according to the distribution mode; Bandwidth resource allocation is performed on the corresponding first QoS flow, and optionally, the bandwidth resource allocated to it is not less than the guaranteed flow bandwidth GFBR.

The embodiment of the present application provides a feasible solution for allocating the first bandwidth resource and allocating the second bandwidth resource. The bandwidth resource is not less than the guaranteed flow bandwidth GFBR, so that the bandwidth of the service flow data in the main access technology can be guaranteed.

Based on the fifth implementation manner of the first aspect, the embodiment of this application also provides a sixth implementation manner of the first aspect:

In the master-slave mode, it is also necessary to adjust the allocation of bandwidth resources according to the network conditions of the access technology. When the first bandwidth resource corresponding to the master access technology is occupied, the session management network element ensures the normal transmission of service flows. It is necessary to allocate the second bandwidth resource for the secondary access technology, wherein the guaranteed bandwidth value of the allocated second bandwidth resource cannot be less than the GFBR.

The session management network element first allocates resources in the access technology corresponding to the primary access technology. When it is found that the first bandwidth resource corresponding to the primary access technology is occupied, it needs to allocate resources in the secondary access technology. In this way, it can ensure The normal switching or moving of the service flow avoids affecting the transmission of its service flow due to the occupation of bandwidth resources, and improves the reliability of data transmission.

Based on the fifth implementation manner of the first aspect, the embodiment of this application also 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 also includes a multi-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, wherein, The multi-access indication is used to instruct the session management network element to allocate resources in both the first access technology and the second access technology, so 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 there are multiple access indications in the first indication information of the service flow, even if the first bandwidth resource of the first QoS flow is not occupied, it is still necessary to allocate the second bandwidth resource to the second QoS flow In this way, when the service flow is switched or moved between the two access technologies, bandwidth resources are guaranteed, which improves the reliability of data transmission.

Based on the second implementation manner of the first aspect, the embodiment of this application also provides an eighth implementation manner of the first aspect:

When the offload mode is the minimum round-trip time offload mode, the session management network element needs to allocate the same bandwidth resource for the first QoS flow and the second QoS flow, so the session management network element allocates the first bandwidth resource for the first QoS flow and the second QoS flow for the second QoS flow. Two QoS flows allocate the second bandwidth resource, the first bandwidth resource is the same as the second bandwidth resource, and their guaranteed bandwidth values are not less than GFBR.

Since the minimum round-trip time offloading mode requires the service flow to always use the access network corresponding to the link with the smallest RTT to transmit the service flow, the embodiment of the present application reserves sufficient bandwidth resources in advance in both access technologies, so that It can ensure fast switching of business flows.

Based on the second implementation manner of the first aspect, the embodiment of this application also provides a ninth implementation manner of the first aspect:

When the offloading mode of the QoS flow is the load balancing offloading mode, the session management network element needs to first determine the offloading ratio of the QoS flow, and then determine the amount that should be allocated between the two access technologies according to the GFBR and the offloading ratio of the QoS flow. Guaranteed bandwidth value, that is, calculate through GFBR and offload ratio, determine the first reference value of bandwidth resources allocated in the first access technology and the second reference value of bandwidth resources allocated in the second access technology, and then according to the first reference value and the second reference value to allocate resources for the QoS flow, allocate the first bandwidth resource for the first QoS flow, wherein the guaranteed bandwidth value of the first bandwidth resource needs to be greater than the first reference value; allocate the second bandwidth resource for the second QoS flow, The guaranteed bandwidth value of the second bandwidth resource is greater than the second reference value; optionally, the 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 flow bandwidth MFBR.

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

Based on the ninth implementation manner of the first aspect, the embodiment of this application also provides a tenth implementation manner of the first aspect:

In the load balancing and offloading mode, the session management network element still needs to allocate resources according to the network conditions of the access network corresponding to the access technology. The session management network element needs to obtain the first current available bandwidth value and the first QoS flow corresponding to the first QoS flow. The second currently available bandwidth value corresponding to the second QoS flow, and then configure the guaranteed bandwidth value of the first bandwidth resource as the first currently available bandwidth value, and configure the guaranteed bandwidth value of the second bandwidth resource as the second currently available bandwidth value.

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

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

The session management network element may also receive second indication information of the second service flow, where the second indication information also includes the offload mode of the second service flow, if the session management network element judges that the offload mode of the second service flow is different from the first If the offloading modes of the service flows are the same, the second service flow is bound to the QoS flow established by the session management network element for the first service flow.

In the embodiment of this application, multiple service flows of the same distribution mode can be bound to a common QoS flow, and then resource allocation is performed on them together, without re-establishing a QoS flow for each service flow, and because they are bound together The offloading modes of all service flows are the same, so it is convenient for the session management network element to allocate bandwidth resources.

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

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

In the solution provided by the embodiment of this application, it is necessary to establish the QoS flow according to the multi-access indication. The multi-access indication is used to instruct the session management network element to allocate resources for both QoS flows, and the session management network element can be based on The multi-access indication is used to divide resources, so as to facilitate the movement of service flow data in the two access technologies.

Based on the twelfth implementation manner of the first aspect, the embodiment of this application also 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 indication information contain multiple access If there are multiple access indications in the first indication information but not in the second indication information, or there are multiple access indications in the second indication information but not in the first indication information, Then it is necessary to bind the first service flow and the second service flow into different QoS flows.

The embodiment of this application provides a feasible solution for establishing QoS flow. In this solution, if one of the two service flows has a multi-access indication and the other does not have a multi-access indication, then they need to be bound to different QoS flows. , since session management network elements jointly allocate resources through QoS flow, binding service flows according to multiple access indications provides a new way to establish QoS flow.

Based on any one of the first implementation manner of the first aspect to the thirteenth implementation manner of the first aspect, the embodiment of the present application also provides a 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 the first data channel of the QoS flow, and the second access technology is the QoS flow The second data channel of the flow, that is, one QoS flow corresponds to two data channels, and then the session management network element allocates bandwidth resources for it in the two data channels.

In the embodiment of the present application, the session management network element only needs to establish one QoS flow, and apply the QoS flow to two data channels, and allocate resources for it in the two data channels, reducing the operation of establishing QoS flow, Increased efficiency.

The second aspect of the embodiment of this application provides a data transmission method:

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

The user plane network element transmits the service flow according to the offload 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 embodiment of this application also provides the first implementation manner of the second aspect:

The bandwidth resource information of the QoS flow includes information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is The QoS flow established through the second access technology; the user plane network element transmits the service flow according to the offload mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs, including:

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

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

Based on the first implementation of the second aspect, the embodiment of this application also provides a second implementation of the second aspect:

The transmission channel of the service flow includes a first transmission channel and a second transmission channel, wherein 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 service flow; the bandwidth resource information includes the bandwidth resource of the first transmission channel and the bandwidth resource of the second transmission channel.

Based on the second implementation of the second aspect, the embodiment of this application also provides a third implementation of the second aspect:

When the distribution mode of the service flow 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 first determines the transmission channel of the QoS flow corresponding to the high-priority access technology A transmission channel for transmitting the service flow is determined, and then the first bandwidth resource on the transmission channel is determined, and finally the service flow is transmitted on the transmission channel corresponding to the first priority by using the first bandwidth resource.

Since the session management network element allocates resources in two transmission channels for the QoS flow corresponding to the service flow, when the user plane network element transmits data, it first selects the high-priority data channel for transmission, and when the first bandwidth resource When the normal transmission of the GBR service flow can be guaranteed, there is no need to utilize the resources of the low-priority data channel.

Based on the third implementation of the second aspect, the embodiment of this application also provides a fourth implementation of the second aspect:

In the priority-based offload mode, the user plane network element needs to transmit the service flow on the high-priority transmission channel first, but when the first bandwidth resource of the high-priority transmission channel is occupied, the user plane network element It is necessary to determine the second bandwidth resource of the transmission channel corresponding to the second priority; and then use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the second priority.

The session management network element allocates resources in both transmission channels for the QoS flow corresponding to the service flow. Move or switch to the side with low priority, which can guarantee the transmission of GBR service flow.

Based on the second implementation manner of the second aspect, the embodiment of this application also provides a fifth implementation manner of the second aspect:

When the distribution mode of the service flow is the 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 transmission channel of the QoSflow is determined as the transmission channel used to transmit the service flow, then the first bandwidth resource on the transmission channel is determined, and finally the first bandwidth resource is used to transmit the service on the transmission channel corresponding to the first priority flow.

Since the session management network element allocates resources in two transmission channels for the QoS flow corresponding to the service flow, when the user plane network element transmits data, it first selects the data channel corresponding to the main QoS flow for transmission. When the first bandwidth When the resources can guarantee the normal transmission of the GBR service flow, there is no need to use the resources of the data channel from the QoS flow.

Based on the fifth implementation manner of the second aspect, the embodiment of this application also provides a sixth implementation manner of the second aspect:

In the master-slave split mode, the user plane network element needs to transmit the service flow on the transmission channel corresponding to the main access technology first, but when the first bandwidth resource of the transmission channel corresponding to the main access technology is occupied, the user plane network It is necessary to determine the second bandwidth resource of the transmission channel corresponding to the secondary access technology; and then use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the secondary access technology.

The session management NE allocates resources in both transmission channels for the QoS flow corresponding to the service flow. When the user plane NE performs data transmission, the bandwidth resources of the data channel corresponding to the main access technology are Flow data is moved or switched to the secondary access technology side, which can guarantee the transmission of GBR service flow.

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

An acquiring unit, configured to acquire first indication information of a first service flow, where the first indication information includes an offload mode of the first service flow, and the first service flow is a guaranteed bit rate (GBR) service flow;

A processing unit, configured to establish 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 embodiment of this application also provides the 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 embodiment of this application also provides a second implementation manner of the third aspect:

The session management network element further includes a determining unit and an allocating unit, the determining unit is configured to determine the bandwidth resource of the first QoS flow according to the offload mode of the service flow and the QoS flow information, and/or

Determine the bandwidth resources of the second QoS flow according to the offload mode of the service flow and the QoS flow information, wherein the QoS flow information includes guaranteed flow bits of the first QoS flow and/or the second QoS flow rate GFBR and/or the guaranteed bit rate GBR of the service flow in the QoS flow.

Based on the second implementation manner of the third aspect, the embodiment of this application also provides a third implementation manner of the third aspect:

The distribution mode is a priority-based distribution mode, and the QoS flow information also includes the maximum flow bit rate MFBR of the first QoSflow and the second QoS flow;

The determining unit is configured to determine that the first bandwidth resource is preferentially allocated to the first QoS flow, and the 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 for the second QoS flow when the guaranteed bandwidth value of the first bandwidth resource is less than the guaranteed flow bit rate GFBR, and the first bandwidth resource The sum of the guaranteed bandwidth value and the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR, or not greater than the MFBR.

Based on the third implementation of the third aspect, the embodiment of this application also provides a fourth implementation of the third aspect:

The acquiring unit is further configured to acquire the 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 the 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 embodiment of this application also provides a fifth implementation manner of the third aspect:

When the distribution mode is a master-slave distribution mode, the allocation unit is specifically configured to allocate a first bandwidth resource for the first QoS flow according to the distribution mode, wherein the guaranteed bandwidth value of the first bandwidth resource is Not less than the stated GFBR.

Based on the fifth implementation manner of the third aspect, the embodiment of this application also provides a sixth implementation manner of the third aspect:

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

Based on the fifth implementation manner of the third aspect, the embodiment of this application also provides a seventh implementation manner of the third aspect:

The first indication information further includes a multi-access indication; the multi-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 for the second QoS flow according to the multiple access indication, wherein the guaranteed bandwidth value of the first bandwidth resource is different from the guaranteed bandwidth value of the second bandwidth resource The bandwidth values are the same.

Based on the second implementation manner of the third aspect, the embodiment of this application also 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 for the first QoSflow, and allocate a second bandwidth resource for the second QoS flow;

Wherein, 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 specified Described GFBR.

Based on the second implementation manner of the third aspect, the embodiment of this application also provides a ninth implementation manner of the third aspect:

The distribution mode is a load balancing distribution mode, and the QoS flow information also includes the maximum flow bandwidth resource MFBR of the first QoS flow and the second QoS flow; the determining unit is specifically configured to , determining a distribution ratio, and determining a first reference value and a second reference value according to the guaranteed flow bandwidth GFBR and the distribution ratio;

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

Wherein, 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 greater than the maximum flow bandwidth MFBR.

Based on the ninth implementation manner of the third aspect, the embodiment of this application also provides a tenth implementation manner of the third aspect:

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

The allocation unit is further configured to allocate the first bandwidth resource according to the first currently available bandwidth value, where the guaranteed bandwidth value of the first bandwidth resource is the same as the first currently available bandwidth value.

The allocation unit is further configured to allocate the second bandwidth resource according to the second currently available bandwidth value, wherein the guaranteed bandwidth value of the first bandwidth resource is the same as the second currently available bandwidth value.

Based on any one of the third aspect to the tenth implementation manner of the third aspect, the embodiment of this application also provides 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 an offload mode of the second service flow;

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

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

The first indication information and/or the second indication information further includes a multi-access indication, and the multi-access indication is used to instruct the allocation unit to use both the first access technology and the second access technology Allocate bandwidth resources.

Based on the twelfth implementation of the third aspect, the embodiment of this application also provides a thirteenth implementation of the third aspect:

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

Based on any one of the first implementation manner of the third aspect to the thirteenth implementation manner of the third aspect, the embodiment of the present application also provides 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 identifier QFI.

The fourth aspect of the embodiments of this application provides a user plane network element:

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

A sending unit, configured to transmit the service flow according to the distribution 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 embodiment of this application also provides the first implementation manner of the fourth aspect:

The bandwidth resource information of the QoS flow includes information of a first QoS flow and information of a second QoS flow, wherein the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is The QoS flow established through the second access technology; the user plane network element also includes a determination unit;

The determining unit is specifically configured to determine a transmission channel for transmitting the service flow according to the distribution mode;

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 embodiment of this application also provides a second implementation manner of the fourth aspect:

The transmission channel of the service flow includes a first transmission channel and a second transmission channel, wherein 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 first QoS flow. The service flow of the second QoS flow; the bandwidth resource information includes the bandwidth resource of the first transmission channel and the bandwidth resource of the second transmission channel.

Based on the second implementation manner of the fourth aspect, the embodiment of this application also provides a third implementation manner of the fourth aspect:

When the distribution mode is a priority-based distribution mode, the determining unit is specifically configured to determine the first QoS flow and the access corresponding to the first QoS flow according to the priority-based distribution mode Priority of technology, determining the transmission channel corresponding to the first priority as the transmission channel for transmitting the service flow, wherein the priority includes a first priority and a second priority, and the first priority greater than said 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 use the first bandwidth resource to transmit the service flow on the transmission channel corresponding to the first priority.

Based on the third implementation manner of the fourth aspect, the embodiment of this application also provides a fourth implementation manner of the fourth aspect:

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

The sending unit is specifically configured to use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the second priority.

Based on the second implementation manner of the fourth aspect, the embodiment of this application also provides a fifth implementation manner of the fourth aspect:

When the distribution mode is a master-slave distribution mode, the determining unit is specifically configured to determine the master-slave relationship of the access technology corresponding to the first QoS flow and the second QoS flow according to the master-slave distribution mode ;

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

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

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

Based on the fifth implementation manner of the fourth aspect, the embodiment of this application also provides a sixth implementation manner of the fourth aspect:

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

The sending unit is further configured to use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the secondary QoS flow.

A fifth aspect of the present application provides a session management network element, including: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, The policy control function network element executes the method described in the first aspect or any possible implementation manner of the first aspect.

A sixth aspect of the present application provides a user plane network element, including: at least one processor and a memory, the memory stores computer-executable instructions that can run on the processor, and when the computer-executable instructions are executed by the processor, The policy control function network element executes the method described in the second aspect or any possible implementation manner of the second aspect.

The seventh aspect of the present application provides a data transmission system, including: a session management network element device and a policy function device, and the session management network element device is described in any possible implementation manner of the above-mentioned third aspect to the third aspect session management network element.

The eighth aspect of the present application provides a data transmission system, including: a user plane network element device, the user plane network element device being the user plane network described in any possible implementation manner of the fourth aspect to the fourth aspect meta device.

A ninth aspect of the embodiments of the present application provides a computer storage medium, where the computer storage medium is used to store computer software instructions used by the above-mentioned session management network element or user plane network element, including instructions for executing the session management network element, Or a program designed by a user plane network element.

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

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

The tenth aspect of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions, To perform the data transmission method described in any one of the possible implementation manners from the first aspect to the first aspect;

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

In a possible implementation, the chip or the chip system described above in the present application further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

The eleventh aspect of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions , to perform the data transmission method described in any one of the possible implementation manners from the second aspect to the second aspect;

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

In a possible implementation, the chip or the chip system described above in the present application further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

The thirteenth aspect of the embodiments of the present application provides a computer program product, the computer program product includes computer software instructions, and the computer software instructions can be loaded by a processor to implement any one of the above first to second aspects. The flow in the method of data transfer.

Description of 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 resource allocation in the embodiment of the present application;

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

FIG. 8 is a schematic diagram of an embodiment of a data transmission method in the embodiment of the present application;

FIG. 9 is a schematic diagram of an embodiment of a session management network element provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of an embodiment of a user plane network element provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of another embodiment of a session management network element provided by the embodiment of the present application;

Fig. 12 is a schematic diagram of another embodiment of a user plane network element provided by an embodiment of the present application.

Detailed ways

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

1 and 2, user equipment (user equipment, UE), (wireless) access network ((radio) access network, (R)AN), user plane function (user plane function, UPF) network element and data network ( datanetwork, DN) is generally referred to as the user layer network function or network element, which is mainly responsible for packet forwarding, QoS control, billing information statistics, etc. User data traffic can pass through the data transmission channel established between UE and DN to transfer.

Wherein, the terminal device may include: UE, handheld terminal, notebook computer, subscriber unit (subscriber unit), cellular phone (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (personal digital assistant, PDA) computer , tablet computer, wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone) or wireless local loop (wireless local loop, WLL) station, machine type communication ( machine type communication (MTC) terminal or other devices that can access the network. The UE and the access network device communicate with each other using a certain air interface technology.

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

The network element function of the control plane is mainly responsible for user registration and authentication, mobility management, and sending data packet forwarding policies and QoS control policies to the user plane to achieve reliable and stable transmission of user plane traffic. Among them, the session management function (session management function, SMF) is mainly used to be responsible for user plane network element selection, user plane network element redirection, Internet protocol (internet protocol, IP) address allocation, bearer establishment, modification and release, etc.; The access and mobility management function (AMF) is mainly responsible for signaling processing, such as access control, mobility management, attachment and detachment, and network element selection; the policy control function (policy control function) , PCF) network element, which mainly supports the provision of a unified policy framework to control network behavior, provides policy rules to the control layer network functions, and is responsible for obtaining user subscription information related to policy decisions. Application function (application function, AF) network element: mainly supports interaction with the third generation partnership project (the3rd generation partner project, 3GPP) core network to provide services, such as affecting data routing decisions, policy control functions or providing third-party services to the network side some services. A network slice selection function (network slice selection function, NSSF) network element is mainly used for network slice selection. AUSF (authentication server function) network element: mainly provides authentication and authentication functions. Unified data management (UDM) can be used for location management and subscription management.

In order to meet the challenges of wireless broadband technology, the 5G network architecture not only supports wireless technologies defined by the 3GPP standard group to access the core network side, but also supports non-3GPP access technologies to access the core network side through non-3GPP conversion functions or next-generation access gateways. As shown in FIG. 3 , compared with the 3GPP system architecture, the non-3GPP network architecture adds a non-3GPP interworking function (non-3GPP interworking function, N3IWF) network element. Including untrusted non-3GPP access network (untrusted non-3GPP access network) equipment in the non-3GPP network: This network element allows the interconnection and intercommunication between the UE and the 3GPP core network using non-3GPP technologies. Among them, non-3GPP technologies such as: Wireless fidelity (Wi-Fi), worldwide interoperability for microwave access (WiMAX), code division multiple access (CDMA) networks, etc., compared to trusted non-3GPP access Network equipment can be directly connected to the 3GPP core network, and the network element needs to be interconnected with the 3GPP core network through a secure tunnel established by a security gateway. The security gateway is, for example, an evolved packet data gateway (evolved packet data gateway, ePDG) or N3IWF network element.

At the same time, the 5G core network will also support trusted non-3GPP access or fixed network access; among them, feasible non-3GPP networks include trusted WALN networks, and fixed networks include fixed home network access. Its network-side architecture is similar to the non-trusted non3GPP access architecture, and the non-trusted non3GPP access gateway is replaced with a trusted WLAN access gateway, or replaced with a fixed network access gateway.

The 5G network architecture supports the establishment of multiple access protocol data unit PDU sessions. As shown in Figure 4, the UE can access UPF through multiple access methods. In the embodiment of this application, the access technology can be 3GPP access, non3GPP access Access, LTE access, 5GRAN access, trusted non3GPP access, untrusted non3GPP access, WLAN access or fixed access, there is no specific limit; in the multi-access PDU session In the service flow, different access technologies can be selected for transmission based on the protocol, so as to realize the offloading of the service flow.

Please refer to FIG. 5 , which is a schematic diagram of an embodiment of establishing a QoS flow in the embodiment of the present application. As shown in Figure 5, in the first embodiment of the data transmission method provided by the embodiment of the present application, the establishment of QoSflow for the GBR service flow by the session management network element includes:

501. The user equipment UE sends a session request to a session management network element;

In this step, the session management network element may refer to the session management function SMF network element. When the user equipment needs a certain GBR service flow, it may initiate a session request to the core network. The session request includes the parameters of the first service flow and UE capability indication information.

Specifically, the form of the session request may be a PDU session establishment request initiated by the user equipment, or a PDU session update request, that is, the UE sends a PDU session establishment request or PDU session modification request message, and the specific form is not limited. The above PDU session establishment request and PDU session update request can be carried by UL NAS TRANSPORT (uplink NAS transport uplink NAS transmission) message and sent to the access and mobility management function AMF network element, and then forwarded by the AMF network element to the SMF network element.

Wherein, the UE capability indication is a capability representation of the user equipment UE, which is used to indicate that the UE has the ability to support the offload transmission of the first GBR service flow in the first access technology and the second access technology. Optionally, the UE supports The GBR first service flow is transmitted on the 3GPP access network and the non-3GPP access network. The UE capability indication information may be carried in the PDU session establishment request, may also be carried in the PDU session update request, and may also be carried in the UL NAS TRANSPORT message, and the specific form is not limited.

Wherein, the first service flow is a GBR service flow that needs resource reservation on the network side in advance. For the GBR service flow, the access network needs to reserve bandwidth resources for it in advance to ensure the transmission of the first service flow.

502. The session management network element sends an offload policy request to the policy function network element;

Optionally, the policy function network element may be a PCF network element. When the SMF network element receives the session request forwarded by the AMF network element, according to at least one of the parameters of the first service flow included in the session request and the UE capability indication information to generate an offload policy request, the offload policy request includes at least one of the parameters of the first service flow and UE capability indication information, and is used to request the policy function network element PCF to determine and deliver the offload policy of the first service flow.

Wherein, 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 source-destination IP address, source-destination port number, protocol type, application identifier, source-destination MAC address, or Including the type of the first service flow, the requested QoS requirement, etc., which are not specifically limited; the parameters of the first service flow are used by the second functional network element to determine the QoS parameters of the first service flow.

The UE capability indication information is used to notify the policy function network element PCF that the UE supports the establishment of the same QoS flow in both the 3GPP access network and the non-3GPP access network.

503. The policy function network element determines the QoS parameter of the first service flow;

In this embodiment, when the policy function network element PCF network element receives the offload policy request sent by the SMF network element, the PCF network element needs to include at least one of the first service flow parameter and UE capability indication information in the offload policy request, to formulate relevant policy rules for the first service flow.

Among them, the PCF network element determines the QoS parameters of the first service flow according to the parameters of the first service flow, such as determining the 5G service quality identifier 5QI (5G QoSIidentifier) of the first service flow according to the type or flow description of the first service flow , determine the allocation and preemption priority ARP (Allocation and Retention Priority) according to the service priority of the first service flow, determine the guaranteed bandwidth GBR value (guaranteedbitrate), the maximum bandwidth MBR (Maximum bitrate) value according to the quality requirements of the first service flow, Or determine the above parameters and so on according to the requested QoS requirement, and the specific form is not limited.

504. The policy function network element determines the first indication information of the first service flow;

Wherein, the first indication information may include at least one of a QoS parameter of the first service flow, an offloading mode, and a multi-access indication.

Each business flow corresponds to a distribution mode. The distribution mode can choose any one of priority-based distribution mode, master-slave distribution mode, minimum round-trip time distribution mode, load balancing distribution mode, or other types of distribution modes. , is not specifically limited.

When the PCF network element receives the UE capability indication information, it knows that the UE has the ability to support the GBR service flow in the first access technology and the second access technology. Therefore, it can issue a multi-access instruction to the SMF network element. , which is used to instruct the session management network element SMF to allocate bandwidth resources to both the first access technology and the second access technology. Exemplarily, for some service flows, the PCF sends a multi-access instruction to the SMF; for example, for service flow A, the PCF sends the multi-access instruction and the flow description of the service flow A, and the SMF simultaneously The first access technology and the second access technology reserve the same resource, and optionally, the SMF requests the same guaranteed bandwidth value from the access network device.

Wherein, the first access technology may be a 3GPP access network, and the second access technology may be a non-3GPP access network; understandably, the first access technology may be a non-3GPP access network, and the second access technology may also be a The 3GPP access network is not specifically limited.

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

After the PCF network element determines the first indication information of the first service flow, it sends the first indication information of the first service flow to the SMF network element.

506. 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, the QoS management of data transmission is based on the quality of service flow QoS flow, and the service flow data with similar QoS (such as the same 5QI or ARP parameters) requirements are aggregated together as the QoS flow for transmission, so the SMF network Elements need to bind the same type of business flows together. Exemplarily, the QoS flow can be determined according to the relevant QoS parameters of the service flow, and service flows with similar parameters can be bound into one QoS flow.

Since this embodiment needs to establish corresponding QoSflow for both the first access technology and the second access technology for the service flow, the distribution modes of the service flows bound together need to be consistent, that is, the QoSflow needs to be established according to the distribution mode. Optionally, one QoS flow can be established for one service flow, or two QoS flows can be established for one service flow.

In an optional implementation manner, the first QoS flow is a QoS flow established through the first access technology, and the second QoS flow may be a QoS flow established through the second access technology.

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

In an optional implementation manner, the session management network element acquires second indication information of the second service flow, where the second indication information includes the offload mode of the second service flow; if the offload mode of the first service flow mode is the same as the distribution mode of the second service flow, then 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 judges whether it is the same type of service flow according to the received service flow 1 and service flow 2 according to the 5QI of service flow 1 and service flow 2. When the 5QI and ARP parameters of service flow 1 and service flow 2 are the same Finally, it is judged whether the distribution modes of service flow 1 and service flow 2 are the same, and if they are the same, service flow 2 is bound to the QoS flow of service flow 1. Optionally, it is also possible to first judge the distribution mode, then judge whether there are multiple access indications, and finally judge whether the 5QI or ARP parameters are the same, and the order of judgment is not limited.

In this way, multiple service flows of the same distribution mode can be bound to a common QoS flow, and then resources are allocated to them together, without re-establishing a QoS flow for each service flow. The offloading modes of the two are the same, so it is convenient for the session management network element to allocate bandwidth resources.

In an optional implementation manner, it is also possible to determine whether to bind according to the multi-access indication of the second service flow. The first indication information of the first service flow contains the multi-access indication. If the session management network element obtains When the second indication information of the second service flow does not include a multi-access indication, the session management network element binds the first service flow and the second service flow into different QoS flows.

If one of the two service flows has a multi-access indication and the other has no multi-access indication, then they need to be bound to different QoS flows. Since the session management network elements jointly allocate resources through the QoS flow, they need to be bound The service flow patterns together are the same, and there are multiple access indications.

In the technical solution provided by this application, after the session management network element receives the first indication information of the service flow, it establishes the guaranteed flow bit rate service quality flow GBR QoS flow according to the distribution mode in the first indication information, because the session management network element The GBR QoS flow has been established for the first access technology and the second access technology respectively, so the service flow data can correspond to either the first access technology or the second access technology, or both the first access technology and the second access technology Transmission on the second access technology. When the service flow data needs to be moved or switched for some reason, there is no need to re-establish the GBR QoS flow for the service flow, and the service flow data can be directly moved from the first access technology to the second access technology, or The service flow data is directly moved from the second access technology to the first access technology, wherein there may be various forms of movement, such as transfer, handover, etc., so that the handover delay is relatively small.

In the above-mentioned first embodiment, after the session management network element establishes the GBR QoS flow for the service flow, it also needs to allocate resources to the first QoS flow and the second QoS flow. The following will allocate resources to the session management network element based on the distribution mode The allocation process is described in detail.

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

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

After the SMF network element has established 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 service flows. Specifically, the SMF network element needs to determine the application method according to the distribution strategy. For example, in the priority-based distribution mode, it is necessary to determine which side of the access network to apply for resources first; in the load balancing distribution mode, it is necessary to First determine how many resources should be applied to each side, etc. Then, according to the determined application strategy, the QoS request can be directly sent to the access network element. After receiving the QoS request, the access network element will reserve resources for it according to the requirements of the SMF network element and feedback the reserved status. to the SMF network element.

Specifically, the SMF network element determines the QoS parameters specifically requested by each access technology side through the offload mode and QoS flow information, such as the guaranteed bandwidth value of bandwidth resources, for example, according to the guaranteed flow bandwidth GFBR in the QoS flow information. Specific guaranteed bandwidth value assigned by the 3GPP access side or non3GPP access side.

602. The session management network element determines bandwidth resources of the second QoS flow according to the offload mode of the service flow and the QoS flow information.

After the session management network element establishes the second QoS flow for the service flow, it also needs to determine the bandwidth resources of the second QoS flow according to the distribution mode and the guaranteed flow bandwidth GFBR of the second QoS flow. The specific determination method is similar to the determination of the bandwidth resources of the first QoS flow in step 601, and will not be repeated here.

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

After the session management network element has determined the bandwidth resources of the QoS flow, it allocates bandwidth resources for it in the access technology corresponding to the first QoS flow, and allocates bandwidth for the second QoS flow in the access technology corresponding to the second QoS flow resource. To provide guaranteed bandwidth for GBR traffic.

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

Step 604 is similar to step 603 and will be described in detail here. It can be understood that step 603 and step 604 are not in a chronological order, which is not specifically limited.

605. The first access technology sends the first current available bandwidth value to the 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 current network conditions of the access network. The access network needs to obtain the current available bandwidth value first, and use the available bandwidth The value is fed back to the session management network element, so that the session management network element can adjust the allocated resources in time to ensure the normal transmission of service flows.

606. The second access technology sends the 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 the two access technologies respectively, and each access technology needs to feed back the current available bandwidth value. It can be understood that step 604 and step 605 do not have a chronological order. The first access technology may send the first current available bandwidth value first, or the second access technology may send the second current available bandwidth value first. limited.

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

The session management network element may adjust the allocated resources according to the current first available bandwidth value and the second available bandwidth value, so as to adapt to the current network conditions of the access network.

608. The session management network element sends the 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 use the allocated bandwidth resource information to process the service flow data transmission.

In a specific implementation, when the service flow corresponds to one QoS flow, the session management network element can generate a corresponding relationship between the service flow description and the QoS flow identifier (such as the identifier QFI1 of the first QoS flow), or/and generate an interface The corresponding relationship between the incoming technology identifier and the guaranteed bandwidth value; the above-mentioned QoS flow is established on the 3GPP and non3GPP sides at the same time. The corresponding relationship is used to instruct the UE to select an access technology for transmission of the above-mentioned service flow data packet. For example, the offload mode indicates that the data packet is transmitted through the 3GPP side, and the guaranteed bandwidth value of the first QoS flow on the 3GPP side meets the service flow QoS requirements, then the UE sends the data packet to the first QoS flow on the 3GPP side for transmission; if the first QoS flow The guaranteed bandwidth resources of the flow on the 3GPP side cannot meet the QoS requirements of the service flow, and the UE sends the data packet to the first QoS flow on the non3GPP side for transmission.

The following describes in detail how to determine and allocate bandwidth resources for QoS flows under different traffic distribution modes.

(1) When the QFI of the first QoS flow and the second QoS flow are the same, that is, when the first QoS flow and the second QoS flow are the same quality of service flow, the session management network element first determines the guaranteed flow bandwidth of the Qos flow according to the QoS parameters The GFBR value and the maximum flow bandwidth MFBR value; optionally, the GBR values of all service flows can be added together, and the obtained sum can be used as the guaranteed flow bandwidth GFBR value; the MBR values of all service flows can be added together, and the obtained sum can be used as the maximum flow Bandwidth MFBR value, or determine the preset difference range, determine the guaranteed flow bandwidth GFBR value according to the sum of the GBR values of all service flows and the difference range, and determine the maximum value according to the sum of the MBR values of all service flows and the difference range Flow bandwidth MFBR value.

In the first optional implementation manner, when the distribution mode is a priority-based distribution mode, the session management network element first determines the priority of the 3GPP access network and the non-3GPP access network; The access network of the first level applies for the first bandwidth resource, and then applies for the second bandwidth resource at the access network of the second priority, wherein the first priority is greater than the second priority, and the guaranteed bandwidth value of the first bandwidth resource is the same as The sum of guaranteed bandwidth values of the second bandwidth resource is not less than the GFBR value and not greater than the MFBR value.

Because in this mode, the service flow is required to transmit data packets through one side access technology first, and when the resources on this side are insufficient, other service data packets will be sent through the other side. Therefore, the SMF first reserves guaranteed bandwidth resources on the high-priority side, and reserves additional bandwidth resources on the low-priority side.

Exemplarily, when the first access technology indicated by the priority offload mode is high priority, the session management network element allocates the guaranteed bandwidth value GFBR1 of the first bandwidth resource to the first QoS flow based on the priority offload mode, GFBR1 is greater than 0 and less than or equal to the value of GFBR, then, the second QoS flow can be assigned a guaranteed bandwidth value GFBR2 of the second bandwidth resource, and GFBR2 can be greater than or equal to 0, and less than or equal to the value of the difference between MFBR and GFBR1. 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 greater than the MFBR.

Exemplarily, when the SMF network element determines that the priority of the 3GPP access network is high according to the offloading mode, it first applies for bandwidth resources to the 3GPP access network, and if the 3GPP access network cannot meet the demand, it then applies to the non-3GPP access network To apply for the second bandwidth resource, it is only necessary to ensure that the sum of bandwidth resources reserved on both sides meets the requirement of guaranteed flow bandwidth GFBR.

For example, service flow 1, service flow 2 and service flow 3 are aggregated into one Qos flow, and the QFI value of this Qos flow is 1; the SMF network element first determines that the GBR value of service flow 1 is 2 Mbps, and the GBR value of service flow 2 is 5Mbps, the GBR value of service flow 3 is 5Mbps, then add the GBR value of the service flow to get the GFBR value of Qos flow1 12Mbps; then, according to the distribution mode, determine that the priority of the 3GPP access network is higher than that of the non-3GPP access network , then the SMF network element first applies for bandwidth resources from the 3GPP access network. According to the feedback from the 3GPP access network, the bandwidth resource that the 3GPP access network can provide for Qos flow1 is 6Mbps, and the non-3GPP access network must reserve at least 6Mbps bandwidth resource for Qos flow1; if the MFBR value of Qos flow1 is 20Mbps, then the non-3GPP access network reserves up to 14Mbps of bandwidth resources for Qos flow1.

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

Exemplarily, when the first access technology indicated by the offload mode is dominant, the session management network element determines according to the offload mode that the guaranteed bandwidth value GFBR1 of the first bandwidth resource allocated by the first QoS flow is not less than GFBR, The guaranteed bandwidth value GFBR2 of the second bandwidth resource allocated for the second QoS flow is equal to 0 or equal to GFBR. When the first bandwidth resource corresponding to the first QoS flow is unavailable, the session management network element updates the second bandwidth resource allocated by the second QoS flow, wherein the updated guaranteed bandwidth value of the second bandwidth resource Not less than the stated GFBR.

If the first bandwidth resource corresponding to the primary QoS flow is unavailable, the session management network element needs to allocate the second bandwidth resource for the secondary QoS flow according to the feedback from the access network, wherein the guaranteed bandwidth value of the second bandwidth resource is not smaller than the GFBR.

If the service flows in the QoS flow have multiple access indications, then it is necessary to apply for bandwidth resources on both the access network corresponding to the main QoS flow and the access network corresponding to the secondary QoS flow, and the bandwidth resources applied for on both sides need to be The normal transmission of the service flow is guaranteed, 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.

The master-slave distribution mode requires the service flow to be transmitted through one side first. When one side is unavailable, the service flow is switched to the other side for transmission. Therefore, the SMF network element needs to pre-register in the access network corresponding to the main QoS flow. Reserve sufficient resources to ensure the normal transmission of service flows. When the access network corresponding to the main QoS flow cannot provide corresponding bandwidth resources, it is necessary to reserve bandwidth resources in the secondary QoS flow to ensure fast switching of service flows.

For example, service flow 1, service flow 2 and service flow 3 are aggregated into one Qos flow, and the QFI value of this Qos flow is 1; the SMF network element first determines that the GFBR value of Qos flow1 is 12Mbps, and the MFBR value is 20Mbps; then the SMF network element It is necessary to judge the master-slave relationship between the 3GPP access network and the non-3GPP access network. If the 3GPP access network is the main access network corresponding to the Qos flow, the first bandwidth resource provided by the SMF network element in the 3GPP access network Between 12Mbps and 20Mbps.

If according to the feedback from the 3GPP access network, it is known that the first bandwidth resource corresponding to the 3GPP access network has been occupied, then it is necessary to allocate bandwidth resources in the non-3GPP access network, and the SMF network element provides it in the non-3GPP access network. The second bandwidth resource should also be between 12Mbps and 20Mbps, so as to guarantee the switching of all service flows.

If there are multiple access indications in the indication information of the service flow in Qos flow1, it is necessary to reserve resources in both the 3GPP access network and the non-3GPP access network. The resources reserved on both sides are the same, and both are at 12Mbps to 20Mbps between.

In the third embodiment, when the offload mode is the minimum round-trip time offload mode, the session management network element allocates the first bandwidth resource in the 3GPP access network, and allocates the second bandwidth resource in the non-3GPP access network; wherein, 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 greater than the MFBR value.

The minimum round-trip time distribution mode, this mode requires the service flow to always use the access network corresponding to the link with the smallest RTT to transmit the service flow. Therefore, the SMF network element needs to reserve the same bandwidth resources in the 3GPP access network and the non-3GPP access network to ensure fast switching of service flows.

In the fourth embodiment, when the distribution mode is the load balancing distribution mode, the session management network element first determines the distribution ratio of the service flow; then determines the first reference value and the second reference value according to the guaranteed flow bandwidth GFBR value and the distribution ratio. value; the session management network element allocates the first bandwidth resource in the 3GPP access network, wherein the guaranteed bandwidth value of the first bandwidth resource is greater than the first reference value; the session management network element allocates the second bandwidth in the non-3GPP access network resources, wherein the guaranteed bandwidth value of the second bandwidth resource is greater than the second reference value; wherein the 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 flow bandwidth MFBR value .

The load balancing distribution mode requires that the service flow is transmitted simultaneously on the 3GPP access network and the non-3GPP access network according to the proportion. Therefore, the SMF network element needs to allocate corresponding bandwidth resources on both sides based on the distribution ratio to ensure the normal transmission of the service flow.

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

If the diversion ratios of multiple service flows included in the QoS flow are different, the reserved bandwidth value on each side can be the sum of the required bandwidth of each service flow on this side; specifically, if the service flows are aggregated The QoS flow includes service flow 1, service flow 2, and service flow 3; the guaranteed bandwidth GBR value of service flow 1 is 10 Mbps, and the distribution ratio is 1:4; the guaranteed bandwidth GBR value of service flow 2 is 12 Mbps, and the distribution ratio is 3 : 1, the guaranteed bandwidth GBR value of service flow 3 is 9Mbps, and the split ratio is 1:2, then it can be determined that the GFBR value of this QoS flow is 31Mbps, and the 3GPP access network needs to reserve a bandwidth resource of 2Mbps for service flow 1, for Reserve 9 Mbps for service flow 2 and 3 Mbps for service flow 3; in non-3GPP access networks, 8 Mbps of bandwidth resources need to be reserved for service flow 1, 3 Mbps for service flow 2, and 6 Mbps for service flow 3; that is The QoS flow reserves at least 14 Mbps of bandwidth resources in the 3GPP access network, and at least 17 Mbps of bandwidth resources in the non-3GPP access network.

In the fifth optional implementation, when the service flow 1 is bound on two QoS flows, the offload mode can also be a redundant transmission indication; the redundant transmission indication is used to indicate the SMF, and the service flow data needs Simultaneous transmission on two QoS flows, the SMF network element can allocate the first bandwidth resource in the 3GPP access network according to the redundant transmission instruction, and allocate the second bandwidth resource in the non-3GPP access network; wherein, the 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 distribution mode of redundant transmission, this mode requires the service flow to be transmitted at the same time on both access networks. Therefore, the SMF network element needs to reserve the same bandwidth resources in the 3GPP access network and the non-3GPP access network to ensure fast switching of service flows.

(2) When the QFI of the first QoS flow and the second QoS flow are different, that is, when the first QoS flow and the second QoS flow are not the same service quality flow, it means that the same service flow belongs to two Qos flows, the first The service flows included in the Qosflow and the second QoS flow overlap, but are not identical. For example, the QFI value of the first Qos flow is 1, and Qos flow 1 is applied to the 3GPP access network, including service flow 1, service flow 2 and service flow 3; the QFI value of the second Qos flow is 2, and Qos flow 2 is applied to The non-3GPP access network includes service flow 1, service flow 4 and service flow 5.

For service flow 1, it is bound in different Qos flows. Since the service flows in the Qos flow have the same distribution mode, it can be determined that service flow 1, service flow 2, and service flow 3 are required in the 3GPP access network. bandwidth resources, determine the bandwidth resources required by service flow 1, service flow 4 and service flow 5 in the non-3GPP access network, and then calculate the GFBR value and MFBR value of Qos flow 1 and Qos flow 2 respectively, in the corresponding access network You can apply for resource reservation separately.

In the technical solution provided by this application, after the session management network element receives the first indication information of the service flow, it establishes the guaranteed flow bit rate service quality flow GBR QoS flow according to the distribution mode in the first indication information, because the session management network element The GBR QoS flow has been established for the first access technology and the second access technology respectively, so the service flow data can correspond to either the first access technology or the second access technology, or both the first access technology and the second access technology Second access technology transmission. When the service flow data needs to be moved or switched for some reason, there is no need to re-establish the GBR QoS flow for the service flow, and the service flow data can be directly moved or switched from the first access technology to the second access technology, It is also possible to directly move or switch the service flow data from the second access technology to the first access technology, so the switching delay is small.

After the session management network element has allocated resources for its GBR QoS flow, it will send the bandwidth resource information related to the service flow to the user equipment and the user plane network element, and then the user equipment and the user plane network element will carry out the service flow according to the allocated resources. The transmission of the service flow by the user plane network element based on the offload mode will be described in detail below.

Please refer to FIG. 7 , which is a schematic diagram of an embodiment of service flow transmission in the embodiment of the present application. As shown in FIG. 7, in the third embodiment of the data transmission method provided in the embodiment of the present application, the transmission of service flow data by the user plane network element includes:

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

The SMF network element establishes service flow information according to the allocation of bandwidth resources in the 3GPP access network and non-3GPP access network, and the service flow information includes the distribution mode of the service flow and the quality of service flow QoS flow to which the service flow belongs Bandwidth resource information.

In an optional implementation manner, after the SMF network element allocates bandwidth resources in the 3GPP access network and the non-3GPP access network, it can generate QFI, The corresponding relationship between the transmission tunnel and the bandwidth value, and then send the corresponding relationship to the UPF network element, so that the connection between the UPF network element and the access network can be established for data transmission; in addition, the above corresponding relationship can also be two parameters At least one of the corresponding relationships specifically includes the corresponding relationship between QFI and transmission tunnel, the corresponding relationship between transmission tunnel and bandwidth value, and the corresponding relationship between QFI and bandwidth value.

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

The user plane network element can be a user plane function UPF network element. After the SMF network element establishes the above corresponding relationship, it sends it to the UPF network element, which is the execution subject of service flow transmission. The UPF network element follows the instruction of the service flow information. The access network establishes a connection and supports service flow data transmission. Optionally, the service flow information also includes the service flow distribution policy, that is, the service flow distribution mode issued by the PCF network element to the SMF network element, and the SMF is generated based on the distribution mode The distribution strategy (for example, the distribution strategy includes the distribution mode), and then the SMF network element sends the distribution strategy to the UPF network element.

703. The user plane network element determines the transmission channel used to transmit the service flow according to the offload policy;

After the UPF network element receives the service flow information sent by the SMF network element, it determines the first QFI value of the first QoS flow according to the service flow included in the service flow information, the QFI value of the QoS flow identifier, and the corresponding relationship table of the transmission channel Corresponding to the first transmission channel, the first transmission channel is applied to the 3GPP access network; determining the second transmission channel corresponding to the second QFI value of the second QoS flow, and the second transmission channel is applied to the non-3GPP access network.

At the same time, a transmission channel for transmitting the service flow is selected according to the distribution mode.

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

When the UPF network element has established connections with the access networks on both sides, it starts to transmit service flow data. Specifically, the UPF network element also needs to determine the transmission strategy according to the distribution strategy, that is, where the service flow data packet is located. One data channel transmission, or the transmission timing on each transmission channel, and then transmit the service flow according to the selected data channel or/and transmission timing.

In another embodiment of the present invention, the user plane network element in step 703 above determines the transmission channel used to transmit the service flow according to the offload mode, and there are also multiple implementation methods; the UPF needs to determine the transmission mode according to the offload mode in the offload strategy, A transmission channel specifically used for transmitting the service flow among the first transmission channel and the second transmission channel is determined, and then the service flow is transmitted on the transmission channel.

In the first optional implementation manner, when the offload mode is a priority-based offload mode, the user plane network element first determines the priority of the first transmission channel and the second transmission channel; The service flow is transmitted on the 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 is in the second priority The service flow is transmitted on a corresponding transmission channel; wherein, the first priority is greater than the second priority.

For example, the QFI value of the QoS flow corresponding to service flow 1 is 1, the transmission channels corresponding to this QFI are tunnel 1 and tunnel 3, tunnel 1 is on the 3GPP access network side, and tunnel 3 is on the non-3GPP access network side; when the UPF network When transmitting service flow 1, first determine the priority of the 3GPP access network and the non-3GPP access network according to the distribution mode. When the priority of the 3GPP access network is higher than that of the non-3GPP access network, that is, the priority of tunnel 1 is greater than If the priority of tunnel 3 is set, the UPF network element transmits the service flow on tunnel 1 first, and when the resource of tunnel 1 is full, the subsequent data of the service flow can be transmitted on tunnel 3.

For example, service flow 1 corresponds to two QoS flows, and its QFI values are 1 and 2. The transmission channel corresponding to QFI 1 is tunnel 4, and the transmission channel corresponding to QFI 2 is tunnel 5. Tunnel 4 is on the 3GPP access network side, and tunnel 5 is On the side of the non-3GPP access network; when the UPF network element transmits service flow 1, first judge the priority of the 3GPP access network and the non-3GPP access network according to the distribution mode. When accessing the network, that is, the priority of tunnel 4 is higher than that of tunnel 5, then the UPF network element transmits the service flow on tunnel 4 first, and when the resource of tunnel 4 is full, the service flow can be transmitted on tunnel 5 follow-up data.

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

For example, the QFI value of the QoS flow corresponding to service flow 1 is 1, the transmission channels corresponding to this QFI are tunnel 1 and tunnel 3, tunnel 1 is on the 3GPP access network side, and tunnel 3 is on the non-3GPP access network side; when the UPF network When transmitting service flow 1, first determine the master-slave relationship between the 3GPP access network and the non-3GPP access network according to the distribution mode. When the 3GPP access network is the main access network, that is, tunnel 1 is the main transmission channel, then UPF The network element transmits the service flow in tunnel 1, and when the resource of tunnel 1 is unavailable, all switches to tunnel 3 to transmit the service flow.

For example, service flow 1 corresponds to two QoS flows, and its QFI values are 1 and 2. The transmission channel corresponding to QFI 1 is tunnel 4, and the transmission channel corresponding to QFI 2 is tunnel 5. Tunnel 4 is on the 3GPP access network side, and tunnel 5 is On the side of the non-3GPP access network; when the UPF network element transmits service flow 1, first judge the master-slave relationship between the 3GPP access network and the non-3GPP access network according to the distribution mode. When the 3GPP access network is the master access network, That is, tunnel 4 is the main transmission channel. Then, the UPF network element transmits and transmits the service flow in tunnel 4. When the resource of tunnel 4 is unavailable, all switches to tunnel 5 to transmit the service flow.

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

For example, the QFI value of the QoS flow corresponding to service flow 1 is 1, the transmission channels corresponding to this QFI are tunnel 1 and tunnel 3, tunnel 1 is on the 3GPP access network side, and tunnel 3 is on the non-3GPP access network side; when the UPF network When the element transmits service flow 1, first judge the round-trip time between tunnel 1 and tunnel 3 according to the distribution mode. When the round-trip time of tunnel 1 is the smallest, the UPF network element transmits and transmits the service flow in tunnel 1. When the round-trip time of tunnel 3 When the round-trip time of Tunnel 1 is less than that, all traffic is switched to Tunnel 3 to transmit the service flow.

For example, service flow 1 corresponds to two QoS flows, and its QFI values are 1 and 2. The transmission channel corresponding to QFI 1 is tunnel 4, and the transmission channel corresponding to QFI 2 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 service flow 1, it first judges the round-trip time between tunnel 4 and tunnel 5 according to the distribution mode. When the round-trip time of tunnel 4 is the smallest, the UPF network element transmits a To transmit the service flow, when the round-trip time of tunnel 5 is less than the round-trip time of tunnel 4, all switches are made to tunnel 5 to transmit the service flow.

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

In the fifth optional implementation, when service flow 1 is bound to two QoS flows, the offload mode can also be a redundant transmission indication; the redundant transmission indication can be a simultaneous transmission indication about QoS flow , the user plane network element simultaneously transmits the same service flow data packet on the first transmission channel and the second transmission channel according to the redundant transmission indication;

For example, service flow 1 corresponds to two QoS flows, and its QFI values are 1 and 2. The transmission channel corresponding to QFI 1 is tunnel 4, and the transmission channel corresponding to QFI 2 is tunnel 5. Tunnel 4 is on the 3GPP access network side, and tunnel 5 is On the non-3GPP access network side, the UPF network element simultaneously transmits the same service flow data packet on tunnel 4 and tunnel 5 according to the received redundant transmission instruction.

In the embodiment of the present invention, the session management network element allocates resources in two transmission channels for the QoS flow corresponding to the service flow, and the user plane network element terminal equipment can obtain the session management network element as the first network and the second network. The network allocates resource information for the GBRQoS flow to instruct user plane network elements and terminal devices to switch or move the service flow data corresponding to the GBR QoS flow.

Please refer to FIG. 8 , which is a schematic diagram of an embodiment of data transmission in the embodiment of the present application. As shown in Figure 8, in the fourth embodiment of the data transmission method provided by the embodiment of the present application, it includes:

801. The user equipment UE sends a session request to a session management network element;

802. The session management network element sends a traffic distribution policy request to the policy function network element;

It can be understood that step 801 is similar to step 501 in Embodiment 1, and step 802 is similar to step 502, and details are not repeated here.

803. The policy function network element determines the first indication information of the first service flow;

Optionally, the policy function network element may be a PCF network element. When the SMF network element receives the session request forwarded by the AMF network element, according to at least one of the parameters of the first service flow included in the session request and the UE capability indication information to generate an offload policy request, the offload policy request includes at least one of the parameters of the first service flow and UE capability indication information, and is used to request the policy function network element PCF to determine and deliver the offload policy of the first service flow.

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

Wherein, the first indication information may include at least one of a QoS parameter of the first service flow, an offloading mode, and a multi-access indication.

Each business flow corresponds to a distribution mode. The distribution mode can choose any one of priority-based distribution mode, master-slave distribution mode, minimum round-trip time distribution mode, load balancing distribution mode or redundant transmission mode, or it can be Other types of shunt modes are not specifically limited.

When the PCF network element receives the UE capability indication information, it knows that the UE has the ability to support the GBR service flow in the first access technology and the second access technology. Therefore, it can issue a multi-access instruction to the SMF network element. , which is used to instruct the session management network element SMF to allocate bandwidth resources to both the first access technology and the second access technology. In an embodiment, for certain service flows, the PCF sends the service flow description and the multi-access instruction to the SMF; Flow A reserves the same bandwidth resource on 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 repeated here.

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 for them according to the distribution mode and QoS flow information. The specific allocation method is similar to the second embodiment, and will not be repeated here.

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

After the session management network element allocates bandwidth resources for the first QoS flow and the second QoS flow, it needs to inform the user plane network element and user equipment of the allocation of resources, so that they can use the allocated resources to process service flow data. transmission.

Specifically, when the service flow corresponds to two QoS flows, the session management network element can generate a correspondence between the service flow description and the two QoS flow identifiers (QFI1 and QFI2), or/and generate a correspondence between the QoS flow identifier and the guaranteed bandwidth value relationship; the corresponding relationship is used for the UE to select QoS flow transmission for the above-mentioned service flow data packets. For example, the distribution mode indicates that the data packet is transmitted through the 3GPP side, and the guaranteed bandwidth value of the first QoS flow meets the service flow QoS requirement, then the UE sends the data packet to the 3GPP side corresponding to the first QoS flow for transmission. 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 the corresponding second QoSflow transmission on the non3GPP side.

In addition, the session management network element can also generate the correspondence between the service flow description and two tunnel identifiers (the 3GPP side tunnel identifier and the non3GPP side tunnel identifier), or/and the correspondence between the tunnel identifier and the guaranteed bandwidth value. The UPF is made to select a corresponding tunnel for the above-mentioned service flow data packet based on at least one of the distribution mode and the resource reserved bandwidth value. For example, the offload 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 service flow QoS requirement, then the UE sends the data packet to the user plane tunnel on the 3GPP side. Otherwise, the guaranteed bandwidth value of the user plane tunnel on the 3GPP side cannot meet the service flow QoS requirements, and the UE sends the data packet to the user plane tunnel on the non3GPP side.

808. The user plane network element determines the transmission channel used to transmit 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 the priority-based mode, the transmission channel corresponding to the high-priority QoS flow can be determined as the transmission channel for transmitting the service flow, or the high-priority QoS flow can be determined as the transmission channel for transmitting service flows. When the transmission channel corresponding to the lower priority level is fully occupied, the transmission channel corresponding to the lower priority level is determined to be the channel for transmitting additional data packets of the service flow, and details are not repeated here.

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

After the user plane network element determines the transmission channel, it can use the allocated bandwidth resources to transmit the service flow data.

Please refer to FIG. 9 , which is a schematic diagram of an embodiment of a session management network element provided by the embodiment of the present application. As shown in Figure 8, the embodiment of this 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 an offload mode of the first service flow, and the first service flow is a guaranteed bandwidth GBR service flow;

The processing unit 902 is configured to establish a first 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 session management function network element provided by the embodiment of this application, the first QoSflow 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 established QoS flow.

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

Determine the bandwidth resources of the second QoS flow according to the offload mode of the service flow and the QoS flow information, wherein the QoS flow information includes the guaranteed flow bandwidth of the first QoS flow and/or the second QoS flow GFBR.

In another embodiment of the session management function network element provided by the embodiment of the present application, the distribution mode is a priority-based distribution mode, and the QoS flow information also includes the first QoS flow and the second QoS flow The maximum flow bandwidth resource MFBR;

The determining unit 903 is specifically configured to determine the priorities of the first QoSflow and the second QoSflow according to the priority-based offload mode;

The allocation 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, wherein the first priority is greater than the second priority level, 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 and not greater than the MFBR.

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

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

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

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

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

In another embodiment of a network element with a session management function provided by an embodiment of the present application, the first indication information further includes a multi-access indication; the multi-access indication is used to indicate that the session management network element is in the Both the first access technology and the second access technology allocate bandwidth resources;

The allocating unit 904 is further configured to allocate a second bandwidth resource for the secondary QoS flow according to the multiple access indication, wherein the guaranteed bandwidth value of the first bandwidth resource is different from the guaranteed bandwidth value of the second bandwidth resource The bandwidth values are the same.

In another embodiment of a network element with a session management function provided by an embodiment of the present application, the offload mode is a minimum round-trip time offload mode, and the allocating unit 904 is specifically configured to allocate the first QoS flow to the first QoS flow. bandwidth resources, allocating second bandwidth resources for the second QoS flow;

Wherein, 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 specified Described GFBR.

In another embodiment of the session management function network element provided by the embodiment of the present application, the distribution mode is a load balancing distribution mode, and the QoS flow information also includes the maximum value of the first QoS flow and the second QoS flow. The flow bandwidth resource MFBR; the determining unit 903 is specifically configured to determine a flow distribution ratio according to the load balancing distribution mode, and determine a first reference value and a second reference value according to the guaranteed flow bandwidth GFBR and the distribution ratio;

The allocating unit 904 is specifically configured to allocate a first bandwidth resource for the first QoS flow, wherein the guaranteed bandwidth value of the first bandwidth resource is greater than the first reference value, and allocate the second bandwidth resource for the second QoS flow. Two bandwidth resources, wherein the guaranteed bandwidth value of the second bandwidth resource is greater than the second reference value;

Wherein, the 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 flow bandwidth MFBR.

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

The allocation unit 904 is further configured to allocate the first bandwidth resource according to the first currently available bandwidth value, where the guaranteed bandwidth value of the first bandwidth resource is the same as the first currently available bandwidth value.

The allocation unit 904 is further configured to allocate the second bandwidth resource according to the second currently available bandwidth value, wherein the guaranteed bandwidth value of the first bandwidth resource is the same as the second currently available bandwidth value.

In another embodiment of a network element with a session management function provided by an embodiment of the present application, the obtaining unit 801 is further configured to obtain second indication information of the second service flow, the second indication information including the second Distribution mode of business flow;

The processing unit 902 is further configured to: if the offload mode of the first service flow is the same as the offload mode of the second service flow, the processing unit divides the first service flow and the second service flow Bind to the established QoSflow.

In another embodiment of a network element with a session management function provided by an embodiment of the present application, the first indication information includes a multi-access indication, and the multi-access indication is used to indicate that the session management network element is in the Both the first access technology and the second access technology allocate bandwidth resources, and the acquiring unit 901 is further configured to acquire second indication information of the second service flow, the second indication information including the second service flow Flow split mode;

The processing unit 902 is further configured to bind the first service flow and the second service flow into different QoS flows when the second indication information does not include a multi-access indication. .

In another embodiment of a network element with a session management function provided by an embodiment of the present application, the first QoS flow and the first QoS flow are the same Qos flow.

It should be noted that, for details such as the information execution process of the unit of the session management network element, refer to the description in the method embodiment shown in FIG. 5 and FIG. 6 of the present application, and details are not repeated here.

Please refer to FIG. 10 , which is a schematic diagram of an embodiment of a user plane network element provided by the embodiment of the present application. As shown in Figure 10, the embodiment of this application provides an embodiment of a user plane network element, including

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

The sending unit 1002 is configured to transmit the service flow according to the distribution mode of the service flow and the bandwidth resource information of the QoS flow to which the service flow belongs.

In another embodiment of a user plane network element provided by an embodiment of the present application, the bandwidth resource information of the QoS flow includes information of the first QoS flow and information of the second QoS flow, wherein the first QoS flow is the QoS flow established through the first access technology, the second QoS flow is the QoS flow established through the second access technology; the user plane network element further includes a determination unit 1003;

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

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

In another embodiment of a user plane network element provided by an embodiment of the present application, the transmission channel of the service flow includes a first transmission channel and a second transmission channel, wherein the first transmission channel is used to transmit the The service flow of the first QoSflow, the second transmission channel is used to transmit the service flow belonging to the second QoS flow; the bandwidth resource information includes the bandwidth resource of the first transmission channel and the second transmission channel bandwidth resources.

In another embodiment of a user plane network element provided in this embodiment of the present application, when the offload mode is a priority-based offload mode, the determining unit 1003 is specifically configured to, according to the priority-based offload mode, determining the first QoS flow and the priority of the first QoS flow, and determining the transmission channel corresponding to the first priority as the transmission channel used to transmit the service flow, wherein the priority includes the first a priority and a second priority, the first priority being greater than the second priority;

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

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

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

The sending unit 1002 is specifically configured to use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the second priority.

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

The determining unit 1003 is specifically configured to determine the transmission channel corresponding to the main QoS flow as the transmission channel used to transmit the service flow;

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

The sending unit 1002 is specifically configured to use the first bandwidth resource to transmit the service flow on the transmission channel corresponding to the main QoS flow.

In another embodiment of the user plane network element provided by the embodiment of the present application, the determining unit 1003 is further configured to determine the second transmission channel corresponding to the secondary QoS flow when the first bandwidth resource is occupied 2. Bandwidth resources;

The sending unit 1002 is further configured to use the second bandwidth resource to transmit the service flow on the transmission channel corresponding to the secondary QoS flow.

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

Memory 1102 may be transient or persistent storage. Furthermore, the central processing unit 1101 may be configured to communicate with the memory 1102, and 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 operations performed by the session management network element in the foregoing embodiments shown in FIG. 5 and FIG. 6 , and details are not described here again.

In this embodiment, the division of specific functional modules in the central processing unit 1101 may be similar to the division of functional modules of the acquisition unit, processing unit, determination unit and other units described in FIG. 8 and FIG. 9 , and will not be repeated here.

It should be noted that, for details such as the information execution process of the central processor 1101 of the session management network element, please refer to the description in the method embodiment shown in FIG. 5 and FIG. 6 above in this application, and details are not repeated here.

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 , memory 1202 , and communication interface 1203 .

Memory 1202 may be transient or persistent storage. Furthermore, the central processing unit 1201 may be configured to communicate with the memory 1202, and execute 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 foregoing embodiment shown in FIG. 10 , and details are not described here again.

In this embodiment, the division of specific functional modules in the central processing unit 1201 may be similar to the division of functional modules of units such as the determination unit and the sending unit described in FIG. 10 above, and will not be repeated here.

It should be noted that, for details such as the information execution process of the central processor 1201 of the session management network element, refer to the description in the method embodiment shown in FIG. 7 above in this application, and details are not repeated here.

The embodiment of the present application also provides a data transmission system, including: a session management network element device and a policy function device. The session management network element device is the session management described in any possible implementation of the embodiment shown in FIG. 9 above. network element.

The embodiment of the present application also provides a data transmission system, including: a user plane network element device, which is the user plane network element device described in any possible implementation manner of the above-mentioned embodiment shown in FIG. 10 .

The embodiment of the present application also provides a chip or a chip system, the chip or chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions, To perform the data transmission method described in any one of the possible implementations of the embodiments shown in FIG. 5 and FIG. 6;

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

In a possible implementation, the chip or the chip system described above in the present application further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

The embodiment of the present application also provides a chip or a chip system, the chip or chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions, To perform the data transmission method described in any one of the possible implementations of the embodiment shown in FIG. 7;

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

In a possible implementation, the chip or the chip system described above in the present application further includes at least one memory, and instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

The embodiment of the present application also provides a computer storage medium, the computer storage medium is used to store the computer software instructions used by the session management network element and the user plane network element, which includes instructions for executing the user plane function of the session management network element The program designed by the network element.

The session management network element may be the session management network element described in FIG. 9 above.

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

The embodiment of the present application also provides a computer program product, the computer program product includes computer software instructions, and the computer software instructions can be loaded by a processor to implement the processing method of the service flow in any one of the above-mentioned Figures 5 to 7 in the process.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it 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 the computer, the processes or functions according to the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disk or optical disk, and other media that can store program codes.

Claims (38)

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;

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.

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;

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.

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;

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.

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;

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.

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;

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.

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:

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 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;

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

28. A user plane network element, comprising:

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.

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;

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.

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;

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

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.

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