WO2021088977A1

WO2021088977A1 - Data transmission method and related device

Info

Publication number: WO2021088977A1
Application number: PCT/CN2020/127069
Authority: WO
Inventors: 于游洋
Original assignee: 华为技术有限公司
Priority date: 2019-11-07
Filing date: 2020-11-06
Publication date: 2021-05-14
Also published as: CN112788680A; CN112788680B; CN115412981A

Abstract

Disclosed in the embodiments of the present application are a data transmission method and a related device, which can be applied in a 5G communication network architecture. The method comprises: a session management network element acquires first indication information of a first service flow, the first indication information comprising a flow division mode of the first service flow, and the first service flow being a guaranteed bit rate (GBR) service flow; and the session management network element establishes, according to the first indication information, a first quality of service (QoS) flow and/or a second QoS flow used to transmit the first service flow. Since the session management network element establishes two QoS flows for a service flow in advance, the QoS flows established in advance can thus be directly applied when service flow data must be moved between different flows, and a service flow can be moved without re-establishment on the other side, thereby reducing the delay.

Description

A data transmission method and related equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 07, 2019, the application number is 201911093035.3, and the invention title is "a method of data transmission and related equipment", the entire content of which is incorporated herein by reference Applying.

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 standards group formulated a 5G network architecture at the end of 2016. This architecture not only supports user equipment (UE) access to the core network through the radio access technologies defined by the 3GPP standard group (such as LTE, 5G RAN, etc.), but also supports the use of non-3GPP access technologies (such as untrusted WLAN). , Fixed network, etc.) access to 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 between the UE and the 5G core network is divided into guaranteed bit rate (guaranteed bit rate, GBR) quality of service flow (QoS flow) and non-guaranteed bit rate. There are two types of rate (non-guaranteed bit rate, non-GBR flow) QoS flow.

In the prior art, GBR QoS flow can only be established on one side of the 3GPP side or the non-3GPP side. When service flow data needs to move from one side to the other side, the GBR QoS flow needs to be re-established on the other side. This leads to an increase in time delay.

Summary 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 the service flow data moves from one side to the other side.

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

In the process of session establishment and session modification, the session management network element will receive the policy rule for guaranteed bandwidth GBR service flow sent by the policy control unit, that is, the first indication information. The policy rule includes the service quality parameters of the service flow and the offload mode. The offloading mode can indicate that the service flow is divided between the two networks. Since the QoS management of the service flow transmission is based on the QoS flow, the session management network element can establish the first service according to the offloading mode of the service flow. Quality flow QoS flow, for example, converging service flows with the same shunt mode to form a QoS flow, or establishing two flows for the service flow, namely the first QoS flow and the second QoS flow.

When the QoS flow is established for the service flow based on the offload mode, the session management network element can directly aggregate the service flows with the same offload mode into the same QoS flow, and establish the QoS flow corresponding to the service flow in advance. When service flow data is moved or switched between the two networks, there is no need to re-establish a new GBR QoS flow on the other side. The service flow data can be moved from the first network or switched to the second network directly according to the QoS flow established in advance. The network can also directly move or switch service flow data from the second network to the first network, so the switching delay is small, or, when the service flow bandwidth demand is high, it can also be transmitted through the first network and the second network at the same time Provide sufficient bandwidth resources.

Based on the first aspect, the embodiments of the present application also provide a 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 be established through the first access technology based on the offload mode. The first QoS flow, the second QoS flow is established through the second access technology.

Since the session management network element has established 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, it can be directly established in advance. With good QoS flow, service flow switching can be realized without re-establishing on the other side, reducing the switching delay.

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

After the session management network element establishes the QoS flow for the service flow data, the session management network element also needs to allocate bandwidth resources for it. Since the traffic distribution mode of the service flow in the same QoS flow is the same, 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 resource 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 resource of flow. Among them, the QoS flow information includes the guaranteed flow 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. Therefore, the service flow can transmit service flow data in the first access technology according to the first QoS flow, or according to the second QoS flow. Flow transmits service flow data 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 small.

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

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

The embodiment of this application provides a feasible solution for allocating the first bandwidth resource and the second bandwidth resource. In this offloading mode, the first bandwidth resource is allocated to the QoS flow corresponding to the high-priority access technology, and then the first bandwidth resource is allocated to 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 embodiments of the present application also provide the fourth implementation manner of the first aspect:

In the above-mentioned priority-based offloading mode, an optional solution is to allocate resources according to the network conditions of the access network corresponding to the access technology. 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, the first bandwidth resource is allocated to it, where the guaranteed bandwidth value of the allocated first bandwidth resource is the same as the current available bandwidth value; and then according to the guarantee of the first bandwidth resource The bandwidth value is used to adjust the bandwidth value of the second bandwidth resource 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 the QoS flow, it adjusts the guaranteed bandwidth values of the two QoS flows at any time based on the feedback of the access network. In this way, the stable transmission of the service flow can be ensured and avoid Because the bandwidth resource is occupied, the transmission of its service flow is affected, which improves the transmission efficiency.

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

If the offload mode of QoS flow is the master-slave offload mode, the session management network element needs to determine the master-slave relationship of the access technologies corresponding to the first QoS flow and the second QoS flow according to the offload mode; then the master access technology first The corresponding first QoS flow allocates bandwidth resources. Optionally, the allocated bandwidth resources are not less than the guaranteed flow bandwidth GFBR.

The embodiment of the application provides a feasible solution for allocating the first bandwidth resource and the second bandwidth resource. In this offloading mode, the first bandwidth resource is allocated for the first QoS flow corresponding to the main access technology, and the allocated 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 embodiments of the present application also provide 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 the service flow. It is necessary to allocate the second bandwidth resource for the slave access technology, where 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 be guaranteed The normal switching or movement of service streams avoids affecting the transmission of the service streams 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 embodiments of the present application also provide the 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 multiple access indications, in the master-slave mode, the session management network element needs to allocate resources for both the first QoS flow and the second QoS flow, where: The multiple access indication is used to 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 this application, since the first indication information of the service flow has multiple access indications, even if the first bandwidth resource of the first QoS flow is not occupied, the second bandwidth resource still needs to be allocated to the second QoS flow. In this way, the service flow is switched or moved between the two access technologies, and bandwidth resources are guaranteed, which improves the reliability of data transmission.

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

When the offloading mode is the minimum round-trip time offloading mode, the session management network element needs to allocate the same bandwidth resource 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, which is the first bandwidth resource for the first QoS flow. The second QoS flow allocates the second bandwidth resource, the first bandwidth resource is the same as the second bandwidth resource, and its guaranteed bandwidth value is not less than GFBR.

Since the minimum round-trip time offload mode requires that the service flow 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 in advance. Can ensure the fast switching of the business flow.

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

When the offloading mode of QoS flow is load balancing offloading mode, the session management network element needs to first determine the offload ratio of QoS flow, and then determine the allocation between the two access technologies based on the GFBR and offload ratio of the QoS flow Guaranteed bandwidth value, that is, calculated by GFBR and offload ratio, determine the first reference value of bandwidth resource allocation in the first access technology and the second reference value of bandwidth resource allocation 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, where the guaranteed bandwidth value of the first bandwidth resource must 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 stream bandwidth MFBR.

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

Based on the ninth implementation manner of the first aspect, the embodiments of the present application also provide a tenth implementation manner of the first aspect:

In the load balancing offload 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, and the session management network element needs to obtain the first currently available bandwidth value and the first QoS flow corresponding to the first QoS flow. Second, the second current available bandwidth value corresponding to the QoS flow, and then the guaranteed bandwidth value of the first bandwidth resource is configured as the first current available bandwidth value, and the guaranteed bandwidth value of the second bandwidth resource is configured as the second current available bandwidth value.

The embodiment of the present application provides a feasible solution for allocating the first bandwidth resource and allocating the second bandwidth resource. In this solution, the guaranteed bandwidth in the first resource is determined according to the network conditions of the access network corresponding to the access technology. The value and the guaranteed bandwidth value in the second resource are configured so that the bandwidth of the service flow data in the first access technology and the second access technology can be guaranteed.

Based on any one of the first aspect to the tenth implementation manner of the first aspect, the embodiments of the present application also provide an eleventh implementation manner of the first aspect:

The session management network element may also receive second indication information of the second service flow. The second indication information also includes the offload mode of the second service flow. If the session management network element determines that the offload mode of the second service flow is the same as the first The offloading mode of the service flow is the same, and 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 offloading mode can be bound to a common QoS flow, and then resource allocation is performed on them together. There is no need to re-establish QoS flow for each service flow, and at the same time, it is bound together. The distribution 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 embodiments of the present application also provide a twelfth implementation manner of the first aspect:

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

In the solution provided by the embodiments of this application, the QoS flow needs to be established according to the multiple access indication. The multiple 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, which facilitates the movement of service flow data between the two access technologies.

Based on the twelfth implementation manner of the first aspect, the embodiments of the present application also provide a thirteenth implementation manner of the first aspect:

After the session management network element obtains the second indication information of the second service flow, it judges the first indication information of the first service flow and the second indication information of the second service flow. If the two indications contain multiple access If there is a multi-access indication in the first indication information but not in the second indication information, or if there is a multi-access indication in the second indication information but not in the first indication information, It is necessary to bind the first service flow and the second service flow to different QoS flows.

The embodiment of this application provides a feasible solution for establishing a QoS flow. In this solution, if one of the two service flows has a multiple access indication and the other does not have a multiple access indication, then they need to be bound to different QoS flows. Since the session management network elements jointly allocate resources through QoS flow, binding service flows according to multiple access instructions 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 embodiments of the present application also provide a fourteenth 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 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 this 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. Improved efficiency.

The second aspect of the embodiments of the present application provides a data transmission method:

The user plane network element receives the service flow information sent by the session management network element, where the service flow information includes the offload mode of the service flow and the QoS flow bandwidth resource information of the service flow to which the service flow belongs, where the service flow Is the GBR business 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 embodiments of the present application also provide the first implementation manner of the second aspect:

The bandwidth resource information of the QoS flow includes the information of the first QoS flow and the information of the second QoS flow, where 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 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:

Determining, by the user plane network element, 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 manner of the second aspect, the embodiments of the present application also provide the second implementation manner of the second aspect:

The transmission channel of the service flow includes a first transmission channel and a second transmission channel. 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 manner of the second aspect, the embodiments of the present application also provide a third implementation manner of the second aspect:

When the offloading mode of the service flow is the offloading mode based on priority, the user plane network element needs to determine the priority according to the offloading mode; the user plane network element first determines the transmission channel of the QoS flow corresponding to the high-priority access technology It is a transmission channel used to transmit the service stream, and then the first bandwidth resource on the transmission channel is determined, and finally the first bandwidth resource is used to transmit the service stream on the transmission channel corresponding to the first priority.

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

Based on the third implementation manner of the second aspect, the embodiments of the present application also provide a fourth implementation manner of the second aspect:

In the priority-based offloading 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. When the user plane network element performs data transmission, the bandwidth resources of the high-priority data channel are occupied, and the service flow data Move or switch to the lower priority side, which can guarantee the transmission of GBR service flow.

Based on the second implementation manner of the second aspect, the embodiments of the present application also provide a fifth implementation manner of the second aspect:

When the offloading mode of the service flow is the master-slave offloading 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 offloading mode; the user plane network element first corresponds to the master access technology The transmission channel of the QoS flow is determined as the transmission channel used to transmit the service flow, and then the first bandwidth resource on the transmission channel is determined, and finally the first bandwidth resource is used to transmit the transmission channel corresponding to the first priority. business flow.

Since the session management network element allocates resources in both transmission channels for the QoS flow corresponding to the service flow, when the user plane network element performs data transmission, first select the data channel corresponding to the main QoS flow for transmission. When 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 embodiments of the present application also provide a sixth implementation manner of the second aspect:

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

The session management network element allocates resources in both transmission channels for the QoS flow corresponding to the service flow. When the user plane network element performs data transmission, the bandwidth resource of the data channel corresponding to the main access technology is occupied, and the service Streaming data is moved or switched to the secondary access technology side, which can guarantee the transmission of GBR service streams.

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

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

The processing unit is configured to establish, according to the first indication information, a first quality of service flow QoS flow and/or a second QoS flow used to transmit the first service flow.

Based on the third aspect, the embodiments of the present application also provide 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 embodiments of the present application also provide the 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 QoS flow information, and/or

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

Based on the second implementation manner of the third aspect, the embodiments of the present application also provide a third implementation manner of the third aspect:

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

The determining unit is configured to determine that the first bandwidth resource is preferentially allocated in 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 value of 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 manner of the third aspect, the embodiments of the present application also provide a fourth implementation manner of the third aspect:

The obtaining unit is further configured to obtain the current available bandwidth value corresponding to the QoS flow of the first priority;

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

Based on the second implementation manner of the third aspect, the embodiments of the present application also provide a fifth implementation manner of the third aspect:

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

Based on the fifth implementation manner of the third aspect, the embodiments of the present application also provide 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 value of the second bandwidth resource is The guaranteed bandwidth value is not less than the GFBR.

Based on the fifth implementation manner of the third aspect, the embodiments of the present application also provide the seventh implementation manner of the third aspect:

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

The allocation 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 and the guarantee of the second bandwidth resource The bandwidth values are the same.

Based on the second implementation manner of the third aspect, the embodiments of the present application also provide an eighth implementation manner of the third aspect:

The offload mode is a minimum round-trip time offload mode, and the allocation unit is specifically configured to allocate a first bandwidth resource for the first QoS flow 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 all The GFBR.

Based on the second implementation manner of the third aspect, the embodiments of the present application also provide a ninth implementation manner of the third aspect:

The offloading mode is a load balancing offloading mode, and the QoS flow information further includes the maximum flow bandwidth resource MFBR of the first QoS flow and the second QoS flow; the determining unit is specifically configured to perform according to the load balancing offloading mode , 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 allocation 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 allocates the first bandwidth resource for the second QoS flow. 2. 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 is not greater than the maximum flow bandwidth MFBR.

Based on the ninth implementation manner of the third aspect, the embodiments of the present application also provide a tenth implementation manner of the third aspect:

The acquiring unit is further configured to acquire the first current available bandwidth value of the first access technology corresponding to the first QoS flow and the 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, wherein 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 embodiments of the present application also provide an eleventh implementation manner of the third aspect:

The acquiring unit is further configured to acquire second indication information of a second service flow, where the second indication information includes the 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 embodiments of the present application also provide a twelfth implementation manner of the third aspect:

The first indication information and/or the second indication information further include a multiple access indication, and the multiple access indication is used to indicate that the allocation unit is in both the first access technology and the second access technology. Allocate bandwidth resources.

Based on the twelfth implementation manner of the third aspect, the embodiments of the present application also provide a thirteenth implementation manner of the third aspect:

The processing unit is further configured to bind the first service flow and the second service flow when the first indication information or the second indication information does not include the multiple 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 embodiments of the present application also provide a fourteenth implementation manner of the third aspect:

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

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

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

The sending unit is configured to transmit 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 fourth aspect, the embodiments of the present application also provide the first implementation manner of the fourth aspect:

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

The determining unit is specifically configured to determine a transmission channel for transmitting the service flow according to the offload 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 embodiments of the present application also provide the second implementation manner of the fourth aspect:

The transmission channel of the service flow includes a first transmission channel and a second transmission channel. 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 embodiments of the present application also provide a third implementation manner of the fourth aspect:

When the offloading mode is a priority-based offloading mode, the determining unit is specifically configured to determine the access corresponding to the first QoS flow and the first QoS flow according to the priority-based offloading mode Priority of the technology, the transmission channel corresponding to the first priority is determined as the transmission channel for transmitting the service stream, wherein the priority includes a first priority and a second priority, and the first priority Greater than the second priority;

The determining unit is specifically configured to determine the first bandwidth resource of the 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 embodiments of the present application also provide the fourth implementation manner of the fourth aspect:

The determining unit is further configured to determine the 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 embodiments of the present application also provide the fifth implementation manner of the fourth aspect:

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

The determining unit 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 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 embodiments of the present application also provide a sixth implementation manner of the fourth aspect:

The determining unit is further configured to determine, when the first bandwidth resource is occupied, the user plane network element to determine the second bandwidth resource of the transmission channel corresponding to the slave 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 slave 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 foregoing first aspect or any one of the possible implementation manners 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 foregoing second aspect or any one of the possible implementation manners of the second aspect.

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

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

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

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

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

The tenth aspect of the present application provides a chip or 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 by wires, 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 first aspect to any one of the possible implementation manners of the first aspect;

Among them, the communication interface in the chip can be an input/output interface, a pin, or a circuit.

In a possible implementation, the chip or chip system described above in this 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, for example, a register, a cache, etc., or a storage unit of the chip (for example, a read-only memory, a random access memory, etc.).

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

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

Description of the drawings

FIG. 1 is a schematic diagram of a network architecture of a 5G network according to an embodiment of this application;

FIG. 2 is a schematic diagram of another network architecture of a 5G network according to an embodiment of this application;

FIG. 3 is a schematic diagram of another network architecture of a 5G network according to an embodiment of this application;

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

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

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

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

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

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

FIG. 10 is a schematic diagram of an embodiment of a user plane network element provided by an embodiment of this application;

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

FIG. 12 is a schematic diagram of another embodiment of a user plane network element provided by an embodiment of this application.

Detailed ways

FIG. 1 is a schematic diagram of a network architecture of the 5G network of this application; FIG. 2 is a schematic diagram of another network architecture of the 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).

User equipment (UE), (radio) access network ((R) AN), user plane function (UPF) network element and data network in Figure 1 and Figure 2 (data network, DN) is generally called the user layer network function or network element, which is mainly responsible for packet data packet forwarding, QoS control, accounting information statistics, etc. The user's data traffic can pass through the data established between the UE and the DN Transmission channel for transmission.

Among them, the terminal equipment 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) Computers, tablet computers, wireless modems, handheld devices, laptop computers, cordless phones or wireless local loops (wireless local loop, WLL), machine type communication (machine type communication, MTC) terminal or other devices that can access the network. The UE and the access network equipment use a certain air interface technology to communicate with each other.

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

The control plane network element functions are mainly responsible for user registration and authentication, mobility management, and issuing data packet forwarding strategies and QoS control strategies to the user plane to achieve reliable and stable transmission of user-level traffic. Among them, the session management function (session management function, SMF) is mainly used for user-plane network element selection, user-plane network element redirection, internet protocol (IP) address allocation, bearer establishment, modification, and release, etc.; Access and mobility management function (AMF), mainly responsible for signaling processing, such as access control, mobility management, attach and detach, and network element selection functions; 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 function, and is responsible for obtaining user subscription information related to policy decisions. Application function (AF) network element: mainly supports interaction with the 3rd generation partner project (3GPP) core network to provide services, such as influencing data routing decisions, policy control functions, or providing third parties to the network side Some of the services. The 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 cope with the challenges of wireless broadband technology, the 5G network architecture not only supports the 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, the non-3GPP network architecture has a new non-3GPP interworking function (N3IWF) network element compared to the 3GPP system architecture. The non-3GPP network includes untrusted non-3GPP access network (untrusted non-3GPP access network) equipment: this network element allows the UE and the 3GPP core network to use non-3GPP technology for interconnection and intercommunication. Among them, non-3GPP technologies such as: Wireless fidelity (Wi-Fi), worldwide interoperability for microwave access (WiMAX), code division multiple access (CDMA) networks, etc., as opposed to trusted non-3GPP access Network equipment can directly access the 3GPP core network, and the network element needs to communicate 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 (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, viable non-3GPP networks include trusted WALN networks, and fixed networks include fixed home network access. Its network-side architecture is similar to the untrusted non3GPP access architecture. The untrusted non3GPP access gateway is replaced with a trusted WLAN access gateway or 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 the UPF through multiple access methods. In the embodiment of this application, the access technology can be 3GPP access and non3GPP access. Access, LTE access, 5GRAN access, trusted non3GPP access, untrusted non3GPP access, WLAN access, or fixed access. The specific access method is not limited; in the multi-access PDU session In the service flow, different access technologies can be selected for transmission based on the protocol to realize the shunting of the service flow.

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

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

In this step, the session management network element may refer to the session management function SMF network element. When the user equipment needs a 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 the 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 a PDU session modification request message, and the specific format is not limited. The foregoing PDU session establishment request and PDU session update request may be carried by a UL NAS TRANSPORT (uplink NAS transport) message carried to the access and mobility management function AMF network element, and then forwarded by the AMF network element to the SMF network element.

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

Among them, the first service flow is a GBR service flow that requires the network side to reserve resources 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 a shunt 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, it is based on at least one of the parameters of the first service flow and the UE capability indication information included in the session request To generate an offload strategy request, which 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 issue the offload strategy for the first service flow.

Among them, the parameters of the first service flow may be indication information related to the quality of service of the first service flow, such as one of the source and destination IP address, source and destination port number, protocol type, application identifier, source and destination MAC address, or Including the type of the first service flow, the requested QoS requirements, etc., which are not specifically limited; the parameters of the first service flow are used by the second functional network element to determine the quality of service 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 quality of service flow Qos flow in both the 3GPP access network and the non-3GPP access network.

503. The policy function network element determines the quality of service 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 according to the offload policy request, To formulate relevant policy rules for the first business flow.

Among them, the PCF network element determines the quality of service QoS parameters of the first service flow according to the parameters of the first service flow, such as determining the 5G quality of service identifier 5QI (5G QoS Iidentifier) 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 business priority of the first service flow, and determine the guaranteed bandwidth GBR value (guaranteed bitrate) and the maximum bandwidth MBR (Maximum bitrate) according to the quality requirements of the first service flow ) Value, or determine the above-mentioned parameters according to the requested QoS requirements, 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 the QoS parameter of the first service flow, the offload mode and the multiple access indication.

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

When the PCF network element receives the UE capability indication information, it knows that the UE has the ability to support GBR service flow in the first access technology and the second access technology and has the ability to offload transmission, so it can issue multiple access indications to the SMF network element , Used to instruct the session management network element SMF to allocate bandwidth resources in both the first access technology and the second access technology. Exemplarily, for certain service flows, PCF issues multiple access indications to SMF; for example, for service flow A, PCF issues multiple access indications and the flow description of service flow A. For this service flow A, the SMF sends multiple access indications at the same time. The first access technology and the second access technology reserve the same resources. Optionally, the SMF requests the same guaranteed bandwidth value from the access network device.

Among them, the first access technology can be a 3GPP access network, and the second access technology can be a non-3GPP access network; it is understandable that the first access technology can be a non-3GPP access network, and the second access technology can also be 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 delivers the first indication information of the first service flow to the SMF network element.

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

Under the 5G network architecture, the QoS management of data transmission is based on the quality of service flow QoS flow. Service flow data with similar QoS (such as having the same 5QI or ARP parameters) requirements are gathered together as a QoS flow for transmission, so the SMF network Meta needs to bind the same type of business flow together. Exemplarily, the QoS flow can be determined according to the related QoS parameters of the service flow, and the service flows with similar parameters are bound to a QoS flow.

Since this embodiment needs to establish a corresponding QoS flow for both the first access technology and the second access technology for the service flow, the distribution mode of the service flows that are bound together needs to be consistent, that is, the QoS flow 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 it can also establish two QoS flows for the first service flow. The first QoS flow corresponds to the first access. Technology, the second QoS flow corresponds to the second access technology.

In an optional implementation manner, the session management network element obtains 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 of the first service flow is If the mode is the same as the offload mode of the second service flow, the session management network element binds the first service flow and the second service flow to the established QoS flow.

For example, the SMF network element judges whether it is the same type of service flow according to the 5QI of service flow 1 and service flow 2 according to the received service flow 1 and service flow 2. When the 5QI of service flow 1 and service flow 2, the ARP parameters are the same After that, it is judged whether the offloading modes of service flow 1 and service flow 2 are the same. If they are the same, service flow 2 is bound to the QoS flow of service flow 1. Optionally, it is also possible to judge the offload mode first, then judge whether there is a multiple access indication, 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 offloading mode can be bound to a common QoS flow, and then resources can be allocated to them together. There is no need to re-establish QoS flow for each service flow. At the same time, because of the bundled service flows The offloading modes 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 includes 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 multiple access indication, the session management network element binds the first service flow and the second service flow to different QoS flows.

If two service flows have multiple access instructions and one does not have multiple access instructions, they need to be bound to different QoS flows. Since the session management network elements share resources through 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 GBR QoS flow according to the offload mode in the first indication information, because the session management network element GBR QoS flow is established in the first access technology and the second access technology respectively, so the service flow data can correspond to the first access technology, the second access technology, or the first access technology and the second access technology at the same time. 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 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. Among them, there can be multiple forms of movement, such as transfer, handover, etc., so that the handover delay is small.

In the above first embodiment, after the session management network element has established the GBR QoS flow for the service flow, it also needs to allocate resources for the first QoS flow and the second QoS flow. The session management network element will be resourced based on the offloading mode. The allocation process is explained in detail.

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

601. The session management network element determines the bandwidth resource of the first QoS flow according to the offload mode of the service flow and 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 the service flow. Specifically, SMF network elements need to determine the application method according to the offload strategy. For example, in the priority-based offload mode, you need to determine which side of the access network to apply for resources first; in the load balancing offload mode, you need to First determine how many resources should be applied for from each side, etc. Then, according to the determined application strategy, a QoS request can be sent directly to the access network element. After the access network element receives the QoS request, it reserves resources for it according to the requirements of the SMF network element and reports the reservation 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. The guaranteed bandwidth value allocated by the specific 3GPP access side or non3GPP access side.

602. The session management network element determines the bandwidth resource 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 resource of the second QoS flow according to the offload mode and the guaranteed flow bandwidth GFBR of the second QoS flow. The specific determination method is similar to that of determining the bandwidth resource 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 determines the bandwidth resources of the QoS flow, it allocates bandwidth resources to the access technology corresponding to the first QoS flow, and allocates bandwidth to the second QoS flow in the access technology corresponding to the second QoS flow. Resources. To provide guaranteed bandwidth for GBR service flow.

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. This step will be repeated here. It can be understood that step 603 and step 604 have no time sequence, and are not specifically limited.

605. The first access technology sends the first currently 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 set 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 the service flow.

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 is understandable that there is no chronological sequence between step 604 and step 605. The first access technology can send the first current available bandwidth value first, or the second access technology can send the second current available bandwidth value first. limited.

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

The session management network element can adjust the allocated resources according to the current first available bandwidth value and the second available bandwidth value to adapt it to the network conditions of the current 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 bandwidth resources, it needs to send the configured QoS flow bandwidth resource information to the UE and user plane network elements, so that the UE and user plane network elements use the allocated bandwidth resource information to perform service flow data Transmission.

In a specific implementation manner, when a service flow corresponds to a QoS flow, the session management network element may generate a correspondence between the service flow description and the QoS flow identifier (such as the identifier QFI1 of the first QoS flow), or/and generate a connection. 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 the access technology for transmission of the foregoing service flow data packet. For example, if 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 QoS requirements of the service flow, the UE sends the data packet to the first QoS flow transmission on the 3GPP side; if the first QoS flow The guaranteed bandwidth resources of 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 transmission on the non3GPP side.

The following specifically introduces how to determine and allocate bandwidth resources for QoS flow in different offloading modes.

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

In the first optional implementation manner, when the offload mode is a priority-based offload 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 second priority level applies for the first bandwidth resource, and then the second priority access network applies for the second bandwidth resource, where the first priority is greater than the second priority, and the guaranteed bandwidth value of the first bandwidth resource is equal to 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 the access technology of one side first, and when the resources of this side are insufficient, other service data packets are sent through the other side. Therefore, 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, GFBR1 of the first bandwidth resource for the first QoS flow based on the priority offload mode Is a value greater than 0 and less than or equal to GFBR, and then the guaranteed bandwidth value GFBR2 of the second bandwidth resource can be allocated for the second QoS flow. GFBR2 can be greater than or equal to 0 and less than or equal to the value of MFBR minus GFBR1 difference. 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 to the 3GPP access network for bandwidth resources, 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 sufficient to ensure that the sum of the bandwidth resources reserved on both sides meets the requirements of the guaranteed stream bandwidth GFBR.

For example, service flow 1, service flow 2, and service flow 3 converge into a 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 the GBR value of service flow is added, and the GFBR value of Qos flow1 is 12Mbps; then, according to the offload mode, the priority of the 3GPP access network is determined to be higher than that of the non-3GPP access network , Then the SMF network element first applies for bandwidth resources from the 3GPP access network. If it is known from the feedback of the 3GPP access network that the bandwidth resource that the 3GPP access network can provide for Qos flow1 is 6Mbps, the non-3GPP access network must reserve at least 6Mbps bandwidth resources for Qos flow1; if the MFBR value of Qos flow1 is 20Mbps, then the non-3GPP access network reserves 14Mbps bandwidth resources for Qos flow1 at most.

In the second optional implementation manner, when the offloading mode is the master-slave offloading mode, the session management network element needs to first determine the master-slave relationship of the two QoS flows for different access technologies. The first bandwidth resource is applied for in the corresponding access network, and the second bandwidth resource is applied for in the access network corresponding to the QoS flow, where the guaranteed bandwidth value of the first bandwidth resource is not less than 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 not available, the session management network element updates the second bandwidth resource allocated by the second QoS flow, where the updated guaranteed bandwidth value of the second bandwidth resource Not less than the GFBR.

If the first bandwidth resource corresponding to the main 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 of the access network, where the guaranteed bandwidth value of the second bandwidth resource is not available. Less than the GFBR.

If the service flow in the QoS flow has multiple access instructions, then you need to apply for bandwidth resources in 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 stream is guaranteed, that is, the bandwidth value of the first bandwidth resource and the second bandwidth resource are the same and not less than the guaranteed stream bandwidth.

The master-slave offloading 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 as a whole. Therefore, the SMF network element needs to be preset in the access network corresponding to the main QoS flow. Sufficient resources are reserved to ensure the normal transmission of service flows. When the access network corresponding to the main QoS flow cannot provide corresponding bandwidth resources, bandwidth resources need to be reserved in the secondary QoS flow to ensure fast switching of the service flow.

For example, service flow 1, service flow 2, and service flow 3 converge into a Qos flow, and the QFI value of the Qos flow is 1. The SMF network element first determines that the GFBR value of Qos flow 1 is 12 Mbps and the MFBR value is 20 Mbps; then the SMF network element It is necessary to determine the master-slave relationship between the 3GPP access network and the non-3GPP access network. If the 3GPP access network is the access network corresponding to the QoS flow, the SMF network element provides the first bandwidth resource for it in the 3GPP access network Between 12Mbps and 20Mbps.

If it is known from the feedback of the 3GPP access network that the first bandwidth resource corresponding to the 3GPP access network has been occupied, then the bandwidth resource needs to be allocated 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 to ensure all the switching of the service flow.

If there are multiple access indications in the service flow indication information in Qos flow1, resources need to be reserved on both the 3GPP access network and the non-3GPP access network. The reserved resources on both sides are the same, and both are between 12Mbps and 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; where, 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 split 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 the service flow.

In the fourth embodiment, when the offloading mode is the load balancing offloading mode, the session management network element first determines the offload ratio of the service flow; then, according to the guaranteed flow bandwidth GFBR value and the offload ratio, determine the first reference value and the second reference 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 Resource, 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 stream bandwidth MFBR value .

The load balancing offload mode requires that service flows are transmitted in proportion to the 3GPP access network and the non-3GPP access network at the same time. Therefore, SMF network elements need to allocate corresponding bandwidth resources on both sides based on the offload ratio to ensure the normal transmission of service flows.

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

If the split 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 bandwidth required by 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 10Mbps, and the offload ratio is 1:4, and the guaranteed bandwidth GBR value of service flow 2 is 12Mbps, and the offload ratio is 3. :1. The guaranteed bandwidth GBR value of service flow 3 is 9Mbps, and the offload ratio is 1:2. Then it can be determined that the GFBR value of this QoS flow is 31Mbps. In the 3GPP access network, a bandwidth resource of 2Mbps needs to be reserved for service flow 1. 9 Mbps is reserved for service flow 2 and 3 Mbps is reserved for service flow 3. In the non-3GPP access network, it is necessary to reserve bandwidth resources of 8 Mbps for service flow 1, 3 Mbps for service flow 2, and 6 Mbps for service flow 3; This 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 manner, when service flow 1 is bound to two QoS flows, the offload mode can also be a redundant transmission indication; the redundant transmission indication is used to indicate SMF, and service flow data needs For simultaneous transmission on two QoS flows, the SMF network element can allocate the first bandwidth resource in the 3GPP access network and the second bandwidth resource in the non-3GPP access network according to the redundant transmission instruction; 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.

Redundant transmission split mode, this mode requires the service flow to transmit the service flow at the same time on the access network on both sides. 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 the service flow.

(2) When the QFI of the first QoS flow and the second QoS flow are different, that is, the first QoS flow and the second QoS flow are not the same QoS flow, it means that the same service flow belongs to two QoS flows, and the first QoS flow belongs to two QoS flows. The service flows included in the first QoS flow and the second QoS flow overlap, but are not completely the same. 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 Non-3GPP access network, including service flow 1, service flow 4 and service flow 5.

For service flow 1, it is bound to 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. 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 Simply apply for resource reservations 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 GBR QoS flow according to the offload mode in the first indication information, because the session management network element GBR QoS flow is established in the first access technology and the second access technology respectively, so the service flow data can correspond to the first access technology, the second access technology, or the first access technology and the second access technology at the same time. The 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 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 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 allocates 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 perform the service flow according to the allocated resources In the following, the process of the user plane network element's service flow transmission based on the offload mode will be specifically explained.

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 embodiments of the present application, the user plane network element transmitting service flow data includes:

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

The SMF network element establishes service flow information according to the allocation of bandwidth resources in the 3GPP access network and the non-3GPP access network. The service flow information includes the distribution mode of the service flow and the 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, QFI, etc. according to the resource allocation of the 3GPP access network and the non-3GPP access network. The corresponding relationship between the transmission tunnel and the bandwidth value is sent to the UPF network element to establish a connection between the UPF network element and the access network for data transmission; in addition, the above corresponding relationship can also be a pair of parameters At least one of the corresponding relationships specifically includes the corresponding relationship between the QFI and the transmission tunnel, the corresponding relationship between the transmission tunnel and the bandwidth value, and the corresponding relationship between the QFI and the 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 has established the above-mentioned corresponding relationship, it will be sent to the UPF network element that executes the service flow transmission. The UPF network element will follow the instructions of the service flow information. The access network establishes a connection to support service flow data transmission. Optionally, the service flow information also includes the service flow distribution strategy, that is, the distribution mode of the service flow 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 a distribution mode), and the SMF network element sends the distribution strategy to the UPF network element.

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

When 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 corresponding table of the QoS flow identifier QFI value and the transmission channel Corresponding to the first transmission channel, the first transmission channel is applied to the 3GPP access network; the second transmission channel corresponding to the second QFI value of the second QoS flow is determined, and the second transmission channel is applied to the non-3GPP access network.

At the same time, according to the offload mode, the transmission channel for transmitting the service stream is selected.

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

When the UPF network element has established a connection with the access networks on both sides, the service flow data transmission starts. Specifically, the UPF network element also needs to determine the transmission strategy according to the offload strategy, that is, where the service flow data packet is A data channel is transmitted, or the transmission timing on each transmission channel, and then the service stream is transmitted according to the selected data channel or/and transmission timing.

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

In the first optional implementation manner, when the offload mode is the priority-based offload mode, the user plane network element first determines the priorities of the first transmission channel and the second transmission channel; the user plane network element is in the first The service stream is transmitted on the transmission channel corresponding to the first priority; when the transmission channel corresponding to the first priority is full (that is, when no more data packets can be transmitted), the user plane network element is in the second priority The service stream is transmitted on the 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 meta-transmission service flow 1, the priority of 3GPP access network and non-3GPP access network is first judged according to the offload mode. When the priority of 3GPP access network is higher than that of non-3GPP access network, that is, the priority of tunnel 1 is greater than Priority of tunnel 3, the UPF network element first transmits the service flow in tunnel 1, and when the resources of tunnel 1 are 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, 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, the priority of the 3GPP access network and the non-3GPP access network is first determined according to the offload mode. When the priority of the 3GPP access network is higher than that of the non-3GPP access When entering the network, that is, the priority of tunnel 4 is greater than the priority of tunnel 5, then the UPF network element first transmits the service flow in tunnel 4. When the resources of tunnel 4 are full, the service flow can be transmitted on tunnel 5. Follow-up data.

In a second optional implementation manner, when the split mode is in 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; and then the user plane network element determines the master-slave relationship between the first transmission channel and the second transmission channel; The network element transmits the service flow on the main transmission channel; when the resources of the main transmission channel are not available, the user plane network element switches all the service flows to transmission on the secondary transmission channel.

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 meta-transmission service flow 1, first judge the master-slave relationship between the 3GPP access network and the non-3GPP access network according to the offload 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 and transmits the service flow in tunnel 1, and when the resources of tunnel 1 are unavailable, they all switch 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, 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, first judge the master-slave relationship between the 3GPP access network and the non-3GPP access network according to the offload mode. When the 3GPP access network is the main 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 resources of tunnel 4 are unavailable, they all switch to tunnel 5 to transmit the service flow.

In a third optional implementation manner, when the offload mode is the minimum round trip time offload mode, the user plane network element determines the round trip time between the first transmission channel and the second transmission channel; The service stream is transmitted on the transmission channel with the shortest 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, it first judges the round-trip time between tunnel 1 and tunnel 3 according to the offloading 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 it is less than the round-trip time of tunnel 1, it will all switch 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, 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, the round-trip time between tunnel 4 and tunnel 5 is first judged according to the offload mode. When the round-trip time of tunnel 4 is the smallest, the UPF network element transmits one in tunnel 4. When the service flow is transmitted, when the round-trip time of tunnel 5 is less than the round-trip time of tunnel 4, all are switched to tunnel 5 to transmit the service flow.

In a fourth optional implementation manner, when the offloading mode is the load balancing offloading 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 offloading mode .

In the fifth optional implementation manner, when service flow 1 is bound to two QoS flows, the offload mode can also be a redundant transmission indicator; the redundant transmission indicator can be a simultaneous transmission indicator for 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 instruction;

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, 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, the UPF network element simultaneously transmits the same service flow data packet on the tunnel 4 and the tunnel 5 according to the received redundant transmission instruction.

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

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

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

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

It is understandable that step 801 is similar to step 501 in the first embodiment, and step 802 is similar to step 502, and will not be repeated here.

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

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

Each service flow corresponds to a shunt mode. The shunt mode can choose any one of priority-based shunt mode, master-slave shunt mode, minimum round-trip time shunt mode, load balance shunt mode or redundant transmission mode, or it can be There are no specific restrictions on other types of diversion modes.

When the PCF network element receives the UE capability indication information, it knows that the UE has the ability to support GBR service flow in the first access technology and the second access technology and has the ability to offload transmission, so it can issue multiple access indications to the SMF network element , Used to instruct the session management network element SMF to allocate bandwidth resources in both the first access technology and the second access technology. In the embodiment, for certain service flows, the PCF sends a service flow description and a multiple access indication to the SMF; for example, for service flow A, the PCF issues a multiple access indication and the flow description of the above service flow A, and the SMF is this service. Flow A reserves the same bandwidth resources in the first access technology and the second access technology at the same time.

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

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

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

After the session management network element has established the first QoS flow and the second QoS flow, it needs to allocate resources for it according to the offloading mode and QoS flow information. The specific allocation method is similar to that of the second embodiment, and will not be repeated here.

807. The session management network element sends QoS flow bandwidth resource information 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 resource allocation, so that they can use the allocated resources to perform service flow data processing. transmission.

Specifically, when a 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 the correspondence between the QoS flow identifier and the guaranteed bandwidth value Relationship: This corresponding relationship is used by the UE to select QoS flow transmission for the above-mentioned service flow data packets. For example, if the offload mode indicates that the data packet is transmitted through the 3GPP side, and the guaranteed bandwidth value of the first QoS flow meets the QoS requirements of the service flow, the UE sends the data packet to the 3GPP side for transmission corresponding to the first QoS flow. Otherwise, when the guaranteed bandwidth value of the first QoS flow cannot meet the QoS requirements of the service flow, the UE sends the data packet to the second QoS flow corresponding to the non3GPP side for transmission.

In addition, the session management network element may also generate a corresponding relationship between a service flow description and two tunnel identifiers (a 3GPP side tunnel identifier and a non3GPP side tunnel identifier), or/and a corresponding relationship between a tunnel identifier and a guaranteed bandwidth value. The UPF is made to select the corresponding tunnel transmission for the service flow data packet based on at least one of the offload 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 QoS requirements of the service flow, 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 QoS requirements of the service flow, and the UE sends the data packet to the user plane tunnel on the non3GPP side.

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

It is understandable 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 the transmission service flow, or it can be in the high-priority mode. When the transmission channel corresponding to the level is full, the transmission channel corresponding to the low priority is determined to be the channel for transmitting the additional data packets of the service flow, and the details are not described in detail.

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 service flow data.

Please refer to FIG. 9, which is a schematic diagram of an embodiment of a session management network element provided by an embodiment of the present application. As shown in Figure 8, an embodiment of the present application provides an embodiment of a session management network element, including

The obtaining unit 901 is 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 quality of service flow QoS flow and/or a second QoS flow used to transmit the first service flow according to the first indication information.

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

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

Determine the bandwidth resource of the second QoS flow according to the offload mode of the service flow and the QoS flow information, where 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 a network element with a session management function provided in the embodiment of the present application, the offload mode is a priority-based offload mode, and the QoS flow information further includes the first QoS flow and the second QoS flow. The maximum stream bandwidth resource MFBR;

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

The allocating unit 904 is configured to allocate a first bandwidth resource for the QoS flow of the first priority, and allocate a second bandwidth resource for the QoS flow of the 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 session management function network element provided in the 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 allocating unit 904 is specifically configured to allocate the first bandwidth resource according to the currently available bandwidth value, where the guaranteed bandwidth value of the first bandwidth resource is the same as the currently available bandwidth value.

In another embodiment of a network element with a session management function provided in the embodiment of the present application, when the offload mode is the master-slave offload mode, the determining unit 903 is specifically configured to determine the second offload mode according to the offload mode. 1. QoS flow and the primary QoS flow and the secondary QoS flow in 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 session management function network element provided in the embodiment of the present 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 The element allocates a second bandwidth resource for the slave QoS flow, where the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR.

In another embodiment of a session management function network element provided in the embodiment of the present application, the first indication information further includes a multiple access indication; the multiple access indication is used to indicate that the session management network element is 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 to the slave QoS flow according to the multiple access indication, wherein the guaranteed bandwidth value of the first bandwidth resource and the guarantee of the second bandwidth resource The bandwidth values are the same.

In another embodiment of a session management function network element provided in the embodiment of the present application, the offload mode is the 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 resource, to allocate a second bandwidth resource for the second QoS flow;

In another embodiment of a network element with a session management function provided in the embodiment of the present application, the offloading mode is a load balancing offloading mode, and the QoS flow information further includes the maximum value of the first QoS flow and the second QoS flow. Flow bandwidth resource MFBR; the determining unit 903 is specifically configured to determine a 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, where the guaranteed bandwidth value of the first bandwidth resource is greater than the first reference value, and allocates the first bandwidth resource for the second QoS flow. 2. 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 stream bandwidth MFBR.

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

The allocating 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 allocating 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 session management function network element provided in the embodiment of the present application, the obtaining unit 801 is further configured to obtain second indication information of a second service flow, and the second indication information includes the second indication information. Diversion 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 will compare the first service flow with the second service flow. It is bound to the established QoS flow.

In another embodiment of a session management function network element provided in the embodiment of the present application, the first indication information includes a multiple access indication, and the multiple 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 obtaining unit 901 is further configured to obtain second indication information of a second service flow, where the second indication information includes the second service Flow diversion mode;

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

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

It should be noted that the information execution process and other content of the unit of the session management network element can be specifically referred to in the description of the method embodiment shown in FIG. 5 and FIG. 6 in the foregoing application, and will not be repeated here.

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

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

The sending unit 1002 is configured to transmit 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.

In another embodiment of a user plane network element provided in the 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, and the second QoS flow is the QoS flow established through the second access technology; the user plane network element further includes a determining unit 1003;

The determining unit 1003 is specifically configured to determine a transmission channel for transmitting the service stream according to the offload 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 in the 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 for transmission For the service flow of the first QoS flow, 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 The bandwidth resource of the channel.

In another embodiment of a user plane network element provided in the embodiment of the present application, when the offload mode is a priority-based offload mode, the determining unit 1003 is specifically configured to perform according to the priority-based offload mode. Mode, determine the priority of the first QoS flow and the first QoS flow, and determine the transmission channel corresponding to the first priority as the transmission channel used to transmit the service flow, where the priority includes the first A priority and a second priority, where the first priority is 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 in the embodiment of the present application, the determining unit 1003 is further configured to determine the transmission channel corresponding to the second priority when the first bandwidth resource is occupied. 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 in the 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 Primary QoS flow and 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 a user plane network element provided in the embodiment of the present application, the determining unit 1003 is further configured to determine the second transmission channel corresponding to the slave 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 slave 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, a memory 1102, and a communication interface 1103.

The memory 1102 may be short-term storage 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 network element of the session management function.

In this embodiment, the central processing unit 1101 can execute the signal processing operations performed by the session management network elements in the embodiments shown in FIG. 5 and FIG. 6, and the details are not repeated here.

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

It should be noted that the information execution process of the central processor 1101 of the session management network element, etc., can be specifically referred to in the description of the method embodiments shown in FIG. 5 and FIG. 6 in the foregoing application, and will not be repeated here.

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

The memory 1202 may be short-term storage or persistent storage. Further, 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 function network element.

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

In this embodiment, the specific functional module division in the central processing unit 1201 may be similar to the functional module division of the determining unit, the sending unit, and other units described in FIG. 10, and will not be repeated here.

It should be noted that the information execution process of the central processing unit 1201 of the session management network element and other content can be specifically referred to in the description of the method embodiment shown in FIG. 7 in the foregoing application, and will not be repeated here.

An 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 one of the possible implementations of the embodiment shown in FIG. 9 Network element.

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

The embodiments of the present application also provide a chip or 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 by wires, 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 of the embodiments shown in FIG. 5 and FIG. 6;

The embodiments of the present application also provide a chip or 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 by wires, 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 of the embodiment shown in FIG. 7;

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

An embodiment of the present application also provides a computer storage medium, which is used to store computer software instructions used for the above-mentioned session management network element and user plane network element, which includes a user plane function for executing 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 above.

The embodiments of the present application also provide a computer program product, the computer program product includes computer software instructions, the computer software instructions can be loaded by a processor to implement the above-mentioned service flow processing method of any one of FIGS. 5 to 7 In the process.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part.

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 described in this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, 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 usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a 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 conciseness 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 may be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the integrated unit is implemented in the form of a software functional 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 essentially or the part that contributes to the existing technology 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 media include: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disks or optical disks and other media that can store program codes. .

Claims

A method of data transmission, characterized in that the method includes:

The session management network element obtains first indication information of the first service flow, where the first indication information includes the offload 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 quality of service flow QoS flow and/or a second QoS flow used to transmit the first service flow according to the first indication information.
The method according to claim 1, wherein the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is a QoS flow established through a second access technology.
The method according to claim 2, wherein the method further comprises:

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

The session management network element determines the bandwidth resource of the second QoS flow according to the offload mode of the service flow and the QoS flow information, where the QoS flow information includes the first QoS flow and/or the second QoS flow. Guaranteed flow bit rate of QoS flow GFBR and/or guaranteed bit rate GBR of service flow in QoS flow.
The method according to claim 3, wherein the offload mode is a priority-based offload mode, and the QoS flow information further includes the maximum flow bit rate MFBR of the first QoS flow and the second QoS flow;

The session management network element determines the bandwidth resource of the first QoS flow according to the offload mode of the service flow and the QoS flow information and/or the session management network element determines the bandwidth resource of the first QoS flow according to the offload mode of the service flow and the QoS flow The information determining the bandwidth resource of the second QoS flow includes:

The session management network element determines, according to the priority-based offloading mode, to preferentially allocate the first bandwidth resource in the first QoS flow, and the 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 less than the guaranteed flow bit rate GFBR, the session management network element allocates a second bandwidth resource for the second QoS flow, and the guaranteed bandwidth value of the first bandwidth resource The sum of the guaranteed bandwidth value of the second bandwidth resource and the guaranteed bandwidth value is not less than the GFBR or not greater than the MFBR.
The method according to claim 4, wherein the session management network element allocating the first bandwidth resource for the first QoS flow comprises:

Acquiring, by the session management network element, the current available bandwidth value of the access technology corresponding to the first QoS flow;

The session management network element allocates 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 currently available bandwidth value.
The method according to claim 3, wherein the offloading mode is a master-slave offloading mode, and the session management network element determines the bandwidth of the first QoS flow according to the offloading mode of the service flow and QoS flow information The resource and/or the session management network element determining the bandwidth resource of the second QoS flow according to the offload mode of the service flow and the QoS flow information includes:

The session management network element allocates a first bandwidth resource to the first QoS flow according to the offload mode, wherein the guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.
The method according to claim 6, wherein the method further comprises:

When the first bandwidth resource corresponding to the first QoS flow is not available, the session management network element allocates a second bandwidth resource for the second QoS flow, wherein the guaranteed bandwidth value of the second bandwidth resource is not less than all The GFBR.
The method according to claim 6, wherein the first indication information further comprises a multiple access indication; the multiple access indication is used to indicate that the session management network element is in the first access technology and All the second access technologies allocate bandwidth resources, and the method further includes:

The session management network element allocates a second bandwidth resource to the second QoS flow according to the multiple access indication, wherein the guaranteed bandwidth value of the first bandwidth resource and the guaranteed bandwidth value of the second bandwidth resource the same.
The method according to claim 3, wherein the offloading mode is a minimum round trip time offloading mode, and the session management network element determines the first QoS flow based on the offloading mode of the service flow and QoS flow information. The bandwidth resource and/or the session management network element determining the bandwidth resource of the second QoS flow according to the offload mode of the service flow and the QoS flow information includes:

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;

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 all The GFBR.
The method according to claim 3, wherein the offloading mode is a load balancing offloading mode, and the QoS flow information further includes the maximum flow bandwidth resource MFBR of the first QoS flow and the second QoS flow; The session management network element determines the bandwidth resource of the first QoS flow according to the offload mode of the service flow and the QoS flow information and/or the session management network element determines the bandwidth resource of the first QoS flow according to the offload mode of the service flow and the QoS flow information The bandwidth resource of the second QoS flow includes:

The session management network element determines the offload ratio according to the load balancing offload mode;

The session management network element determines the first reference value and the second reference value according to the guaranteed flow bandwidth GFBR and the offload ratio;

The session management network element allocates 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;

The session management network element allocates a second bandwidth resource for the second QoS flow, where 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 is not greater than the maximum flow bandwidth MFBR.
The method according to claim 10, wherein the method further comprises:

Acquiring, by the session management network element, the first current available bandwidth value of the first access technology corresponding to the first QoS flow and the second current available bandwidth value of the second access technology corresponding to the second QoS flow;

The session management network element allocates 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 session management network element allocates the second bandwidth resource according to the second currently available bandwidth value, where the guaranteed bandwidth value of the first bandwidth resource is the same as the second currently available bandwidth value.
The method according to any one of claims 1 to 11, wherein the method further comprises:

Acquiring, by the session management network element, second indication information of a 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 and the offload mode of the second service flow are the same, the session management network element binds the first service flow and the second service flow to the established QoS flow.
The method according to any one of claims 1 to 12, wherein the first indication information and/or the second indication information further comprise a multiple access indication, and the multiple access indication is used to indicate the session The management network element allocates bandwidth resources in both the first access technology and the second access technology.
The method according to claim 13, wherein the method further comprises:

When the first indication information or the second indication information does not include the multiple access indication, the session management network element binds the first service flow and the second service flow to different QoS flows .
The method according to any one of claims 2 to 14, wherein the first QoS flow and the second QoS flow are the same QoS flow, and the first QoS flow and the second QoS flow Have the same QoS flow identifier QFI.
A session management network element, characterized in that it includes:

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

The processing unit is configured to establish, according to the first indication information, a first quality of service flow QoS flow and/or a second QoS flow used to transmit the first service flow.
The session management network element according to claim 16, wherein the first QoS flow is a QoS flow established through a first access technology, and the second QoS flow is a QoS established through a second access technology. flow.
The session management network element according to claim 17, wherein the session management network element further comprises a determining unit and an allocating unit, and the determining unit is configured to determine according to the offload mode and QoS flow information of the service flow The bandwidth resource of the first QoS flow, and/or

Determine the bandwidth resource of the second QoS flow according to the offload mode of the service flow and the QoS flow information, where the QoS flow information includes guaranteed flow bits of the first QoS flow and/or the second QoS flow The guaranteed bit rate GBR of the service flow in the rate GFBR and/or QoS flow.
The session management network element according to claim 18, wherein the offload mode is a priority-based offload mode, and the QoS flow information further includes the maximum flow bits of the first QoS flow and the second QoS flow Rate MFBR;

The determining unit is configured to determine that the first bandwidth resource is allocated in the first QoS flow first, 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 value of 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.
The session management network element according to claim 19, wherein the obtaining unit is further configured to obtain the current available bandwidth value of the access technology corresponding to the first QoS flow;

The allocating unit is configured to allocate the first bandwidth resource according to the currently available bandwidth value, wherein the guaranteed bandwidth value of the first bandwidth resource is the same as the currently available bandwidth value.
The session management network element according to claim 18, wherein the offload mode is a master-slave offload mode, and the allocating unit is configured to allocate a first bandwidth for the first QoS flow according to the offload mode Resources, wherein the guaranteed bandwidth value of the first bandwidth resource is not less than the GFBR.
The session management network element according to claim 21, wherein the allocating unit is further configured to: when the first bandwidth resource corresponding to the first QoS flow is not available, the allocating unit is the second QoS flow. flow allocates a second bandwidth resource, where the guaranteed bandwidth value of the second bandwidth resource is not less than the GFBR.
The session management network element according to claim 21, wherein the first indication information further comprises a multiple access indication; the multiple access indication is used to indicate that the session management network element is in the first connection Both the access technology and the second access technology allocate bandwidth resources;

The allocation 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 and the guarantee of the second bandwidth resource The bandwidth values are the same.
The session management network element according to claim 18, wherein the offloading mode is a minimum round-trip time offloading mode, and the allocating unit is configured to allocate a first bandwidth resource for the first QoS flow, and The second QoS flow allocates the second bandwidth resource;

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 all The GFBR.
The session management network element according to claim 18, wherein the offloading mode is a load balancing offloading mode, and the QoS flow information further includes the maximum flow bandwidth resource MFBR of the first QoS flow and the second QoS flow The determining unit is specifically configured to determine the offload ratio according to the load balancing offload mode, and determine the first reference value and the second reference value according to the guaranteed flow bandwidth GFBR and the offload ratio;

The allocation 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 allocates the first bandwidth resource for the second QoS flow. 2. 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 is not greater than the maximum flow bandwidth MFBR.
The session management network element according to claim 25, wherein the acquiring unit is further configured to acquire the first currently available bandwidth value of the first access technology corresponding to the first QoS flow and the second current available bandwidth value. The second current available bandwidth value of the second access technology corresponding to the QoS flow;

The allocation unit is further configured to allocate the first bandwidth resource according to the first currently available bandwidth value, wherein 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.
The session management network element according to any one of claims 16 to 26, wherein the obtaining unit is further configured to obtain second indication information of a second service flow, and the second indication information includes all Describe the distribution 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.
The session management network element according to claims 16-27, wherein the first indication information and/or the second indication information further comprise a multiple access indication, and the multiple access indication is used to indicate the allocation The unit allocates bandwidth resources in both the first access technology and the second access technology.
The session management network element according to claim 28, wherein the processing unit is further configured to: when the first indication information or the second indication information does not include the multiple access indication, the processing unit Bind the first service flow and the second service flow to different QoS flows.
The session management network element according to any one of claims 17 to 29, wherein the first QoS flow and the second QoS flow are the same QoS flow, and the first QoS flow and the second QoS flow are the same. Two QoS flows have the same QoS flow identifier QFI.
A session management network element, comprising: at least one processor and a memory. The memory stores computer-executable instructions that can run on the processor. When the computer-executable instructions are executed by the processor, the processor executes The method described in any one of the possible implementations of claim 1 to claim 15.
A data transmission system, comprising: a session management network element device and a policy function device, the session management network element device being the session management network element according to any one of claims 16 to 30.
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 executes any one of the preceding claims 1 to 15 Methods.
A computer program product storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by the processor, the processor executes any one of claims 1 to 15 Methods.