WO2015143607A1

WO2015143607A1 - Bearer shunting method for backhaul link and network device

Info

Publication number: WO2015143607A1
Application number: PCT/CN2014/073964
Authority: WO
Inventors: 李明超; 熊新; 韩广林; 施艺
Original assignee: 华为技术有限公司
Priority date: 2014-03-24
Filing date: 2014-03-24
Publication date: 2015-10-01
Also published as: CN105144777B; CN105144777A

Abstract

Provided are a bearer shunting method for a backhaul link and a network device. The method comprises: determining, by a first network device, a bearer to be shunted on a main backhaul link; sending, by the first network device, a bearer shunting request message to a second network device; receiving, by the first network device, bearer shunting acknowledgement information sent by the second network device; determining, by the first network device, a target shunting bearer in the bearer to be shunted according to information about the target shunting bearer, and determining auxiliary backhaul link configuration information according to the information about the target shunting bearer and first configuration information; sending, by the first network device, the auxiliary backhaul link configuration information to a third network device; and switching, by the first network device, service data on the target shunting bearer onto a second auxiliary backhaul link. By means of the technical solution of the present invention, when user data amount is large, data on a target shunting bearer of a main backhaul link is shunted onto an auxiliary backhaul link, thereby reducing the load of the main backhaul link and satisfying the QoS demands of user services.

Description

Bearer shunt method and network device for backhaul link

Technical field

The present invention relates to the field of communications technologies, and in particular, to a bearer offloading method and network device for a backhaul link. Background technique

In the future technological development, the dense deployment of small cells is an important scenario of Long Term Evolved (LTE). The small cell deployment uses a low power node (Low Power Node, LPN for short) as a relay node between the UE and the base station, and the transmission power of such a node is smaller than that of the macro base station. The LPN may be a pico base station (Pico), a home base station (Femto), a relay (Relay), a small cell (Small cell), etc., wherein a link between the LPN and a User Equipment (UE) is called access. A link between a link, an LPN, and an evolved Node B (eNB) is called a backhaul link.

Currently, 3GPP mainly includes two types of technologies related to backhaul links, namely, type 1 relay (Type 1 relay) and Release 12 (Release 12) involved in LTE Release 10 (Release 10), which are small base station enhancements (Small). Cell Enhancement, referred to as SCE). Type 1 trunk is introduced into the LTE system as a low-power, low-cost network node. It is mainly used to improve network capacity and expand network coverage. It uses Time-Division Multiplexing (TDM). The mode acts as a relay node between the UE and the base station, that is, in one radio frame, the backhaul link and the access link operate in different subframe slots, respectively. However, due to the limited backhaul capacity of Type 1 trunks and SCEs, in the face of a sharp increase in the amount of user data in the future, when the amount of user data is large, the network transmission capacity caused by excessive backhaul load will limit the service of user services. Quality of Service (QoS) requirements cannot be met. . Summary of the invention

The present invention provides a bearer offloading method and network device for a backhaul link, which is used to solve the QoS requirement of the user service when the network transmission capacity is too high due to the high backhaul load when the amount of user data is large in the prior art. Unsatisfied questions. A first aspect of the present invention provides a bearer offloading method for a backhaul link, including: determining, by a first network device, a to-be-offloaded bearer on a primary backhaul link, where the primary backhaul link is the first network device and a link between two network devices;

The first network device sends a bearer offloading request message to the second network device, where the bearer offloading request message carries the information about the offloaded bearer and the first identity identifier information of the third network device, so that the The second network device determines, according to the bearer offload request information, bearer offload acknowledgement information;

The first network device receives the bearer offload acknowledgment information sent by the second network device, where the bearer offload acknowledgment information carries the information of the target offload bearer and the first configuration information, where the first configuration information is used to indicate Establishing a radio resource control RRC configuration required for the first secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device, the first secondary backhaul The link is configured to transmit the service data on the target offloading bearer; the first network device determines the target offloading bearer in the to-be-distributed bearer according to the information about the target offloaded bearer, and according to the target offloading bearer Information and the first configuration information determine secondary backhaul link configuration information;

Sending, by the first network device, the auxiliary backhaul link configuration information to the third network device, so that the third network device establishes the first secondary backhaul link and the second according to the auxiliary backhaul link configuration information a secondary backhaul link, and a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where the second secondary backhaul link is the third network device and the first a link between network devices;

And transmitting, by the first network device, the service data on the target offloaded bearer to the third network device by using the second secondary backhaul link.

In a first possible implementation manner, according to the first aspect, the bearer offload acknowledgement information further carries a second bearer mapping rule of the first network device;

After the determining, by the first network device, the target offloading bearer in the to-be-offloaded bearer according to the information about the target offloading bearer, the method further includes:

And the first network device updates, according to the second bearer mapping rule, a bearer mapping relationship between the first interface and the fifth interface, and a bearer mapping relationship between the fifth interface and the fourth interface, where The fourth interface is an interface between the first network device and the third network device, and the fifth interface is an interface between the first network device and the fifth network device. In a second possible implementation, before the first network device determines the to-be-offloaded bearer on the primary backhaul link, the first network device further includes:

The first network device measures a load value on the primary backhaul link, and if the load value is greater than a set first threshold, the first network device determines to wait on the primary backhaul link Split load bearing.

In a third possible implementation manner, in combination with the first aspect, the first possible implementation manner, and the second possible implementation manner, the first network device determines a to-be-offloaded bearer on the primary backhaul link, and specifically includes :

The first network device prioritizes the bearers on the primary backhaul link, and the delay sensitive value exceeds a preset second threshold, and/or the cached data exceeds the set third gate. The bearer selection of the limit is the bearer to be split.

A second aspect of the present invention provides a bearer offloading method for a backhaul link, including: receiving, by a third network device, auxiliary backhaul link configuration information sent by the first network device;

The third network device establishes a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and establishes between the first secondary backhaul link and the second secondary backhaul link. The bearer mapping relationship, the first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link is the third network device and Describe a link between the first network devices;

Receiving, by the third network device, the service data on the target offloading bearer by using the second secondary backhaul link;

And transmitting, by the third network device, the service data on the target offloading bearer to the second network device by using the first secondary backhaul link.

A third aspect of the present invention provides a bearer offloading method for a backhaul link, including: receiving, by a second network device, bearer offloading request information sent by the first network device, where the bearer offloading request message carries the to be offloaded The carried information and the first identity information of the third network device;

The second network device determines, according to the bearer offloading request information, the bearer offloading acknowledgement information, where the bearer offloading acknowledgement information carries the information of the target offloaded bearer and the first configuration information;

Sending, by the second network device, the bearer offload confirmation information to the first network device; The second network device establishes a first secondary backhaul link with the third network device; the second network device receives service data on the target offloaded bearer by using the first secondary backhaul link.

In a first possible implementation manner, according to the third aspect, the bearer offload request message further carries a first bearer mapping rule of the second network device;

After the determining, by the second network device, the bearer offloading confirmation information, according to the bearer offloading request information, the method further includes:

The second network device updates the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and updates the bearer mapping relationship between the second interface and the third interface, where the An interface is an interface between the second network device and the first network device, and the second interface is an interface between the second network device and a fourth network device, where the third interface is An interface between the second network device and the third network device.

A fourth aspect of the present invention provides a first network device, including:

a determining module, configured to determine a to-be-offloaded bearer on the primary backhaul link, where the primary backhaul link is a link between the first network device and the second network device;

a sending module, configured to send a bearer offloading request message to the second network device, where the bearer offloading request message carries the information about the offloaded bearer and the first identity identifier information of the third network device, so that the The second network device determines the bearer offload confirmation according to the bearer offload request information.

I Ή自, .,

a receiving module, configured to receive the bearer offload acknowledgment information sent by the second network device, where the bearer offload acknowledgment information carries the information of the target offload bearer and the first configuration information, where the first configuration information is used to indicate establishment The radio resource control RRC configuration required by the first secondary backhaul link, the first secondary backhaul link is a link between the third network device and the second network device, and the first auxiliary backhaul chain The road is used to transmit service data on the target offload bearer;

The determining module is further configured to determine the target offload bearer in the to-be-offloaded bearer according to the information about the target offloaded bearer, and determine a secondary backhaul link according to the information about the target offloaded bearer and the first configuration information. Configuration information;

The sending module is further configured to send the auxiliary backhaul link configuration information, so that the third network device establishes the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, The second secondary backhaul link is a link between the third network device and the first network device; the sending module is further configured to use the second secondary backhaul link to the third network The device sends the service data on the target offloading bearer.

In a first possible implementation manner, according to the fourth aspect, the bearer offload acknowledgement information further carries a second bearer mapping rule of the first network device;

The network device further includes:

And an update module, configured to update, according to the second bearer mapping rule, a bearer mapping relationship between the first interface and the fifth interface, and a bearer mapping relationship between the fifth interface and the fourth interface, where the fourth The interface is an interface between the first network device and the third network device, and the fifth interface is an interface between the first network device and the fifth network device.

In a second possible implementation manner, in combination with the fourth aspect and the first possible implementation, the network device further includes:

a measurement module, configured to measure a load value on the primary backhaul link, and if the load value is greater than a set first threshold, the first network device determines to be offloaded on the primary backhaul link Hosted.

In a third possible implementation manner, in combination with the first aspect, the first possible implementation manner, and the second possible implementation manner, the determining module is specifically configured to:

According to a fifth aspect of the present invention, a second network device is provided, including:

a receiving module, configured to receive the bearer offloading request information sent by the first network device, where the bearer offloading request message carries the information about the offloaded bearer and the first identity identifier information of the third network device;

a determining module, configured to determine, according to the bearer offloading request information, bearer offloading acknowledgement information, where the bearer offloading acknowledgement information carries information and first configuration information of the target offloaded bearer;

a sending module, configured to send the bearer offload acknowledgement information to the first network device, where the establishing module is configured to establish a first secondary backhaul link with the third network device;

The receiving module is further configured to receive service data on the target offloading bearer by using the first secondary backhaul link. In a first possible implementation manner, according to the fifth aspect, the bearer offload request message further carries a first bearer mapping rule of the second network device;

The second network device further includes:

An update module, configured to update a bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update a bearer mapping relationship between the second interface and the third interface, where the first The interface is an interface between the second network device and the first network device, the second interface is an interface between the second network device and the fourth network device, and the third interface is the An interface between the second network device and the third network device.

A sixth aspect of the present invention provides a third network device, including:

a receiving module, configured to receive auxiliary backhaul link configuration information sent by the first network device, and a establishing module, configured to establish a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and Establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device The second secondary backhaul link is a link between the third network device and the first network device;

The receiving module is further configured to receive service data on the target offloading bearer by using the second secondary backhaul link;

And a sending module, configured to send, by using the first secondary backhaul link, the service data on the target offloading bearer to the second network device.

A seventh aspect of the present invention provides a first network device, including:

a processor, configured to determine a to-be-offloaded bearer on the primary backhaul link, where the primary backhaul link is a link between the first network device and the second network device;

a transmitter, configured to send a bearer offloading request message to the second network device, where the bearer offloading request message carries the information about the offloaded bearer and the first identity identifier information of the third network device, so that the first The second network device determines the bearer offload confirmation information according to the bearer offload request information;

a receiver, configured to receive the bearer offload acknowledgment information sent by the second network device, where the bearer offload acknowledgment information carries the information of the target offload bearer and the first configuration information, where the first configuration information is used to indicate establishment a radio resource control RRC configuration required by the first secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device, The first secondary backhaul link is configured to transmit service data on the target offloading bearer;

The processor is further configured to determine the target offload bearer in the to-be-offloaded bearer according to the information about the target offloaded bearer, and determine a secondary backhaul link according to the information about the target offloaded bearer and the first configuration information. Configuration information;

The transmitter is further configured to send the auxiliary backhaul link configuration information, so that the third network device establishes the first secondary backhaul link and the second secondary backhaul link according to the secondary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where the second secondary backhaul link is the third network device and the first network device The transmitter is further configured to send the service data on the target offload bearer to the third network device by using the second secondary backhaul link.

In a first possible implementation manner, according to the seventh aspect, the bearer offload acknowledgement information further carries a second bearer mapping rule of the first network device;

The processor is further configured to:

Updating, according to the second bearer mapping rule, a bearer mapping relationship between the first interface and the fifth interface, and a bearer mapping relationship between the fifth interface and the fourth interface, where the fourth interface is the An interface between the network device and the third network device, where the fifth interface is an interface between the first network device and the fifth network device.

In a second possible implementation, in combination with the seventh aspect and the first possible implementation, the processor further includes:

The load value on the primary backhaul link is measured, and if the load value is greater than the set first threshold, the first network device determines a to-be-distributed bearer on the primary backhaul link.

In a third possible implementation manner, in combination with the seventh aspect, the first possible implementation manner, and the second possible implementation manner, the processor is specifically configured to:

According to an eighth aspect of the present invention, a second network device is provided, including:

a receiver, configured to receive the bearer offloading request information sent by the first network device, where the bearer offloading request message carries the information about the offloaded bearer and the first identity identifier information of the third network device; a processor, configured to determine, according to the bearer offloading request information, bearer offloading acknowledgement information, where the bearer offloading acknowledgement information carries information and first configuration information of the target offloaded bearer;

a transmitter, configured to send the bearer offload confirmation information to the first network device;

The processor is further configured to establish a first secondary backhaul link with the third network device, where the receiver is further configured to receive service data on the target offloaded bearer by using the first secondary backhaul link.

In a first possible implementation manner, according to the eighth aspect, the bearer offload request message further carries a first bearer mapping rule of the second network device;

The processor is further configured to: update a bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update a bearer mapping relationship between the second interface and the third interface, where The first interface is an interface between the second network device and the first network device, and the second interface is an interface between the second network device and the fourth network device, where the third interface is An interface between the second network device and the third network device.

A ninth aspect of the present invention provides a third network device, including:

a receiver, configured to receive auxiliary backhaul link configuration information sent by the first network device;

a processor, configured to establish a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and establish a relationship between the first secondary backhaul link and the second secondary backhaul link a bearer mapping relationship, the first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link is the third network device and the a link between the first network devices;

The receiver is further configured to receive, by using the second secondary backhaul link, service data on a target offloading bearer, where the transmitter is configured to send the target to the second network device by using the first secondary backhaul link Traffic data on the offloaded bearer.

The method for the bearer offloading of the backhaul link provided by the present invention, the first network device determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, where the bearer offloading request message carries the information to be offloaded bearer And the first identity information of the third network device, and then receiving the bearer offload acknowledgement information sent by the second network device, where the bearer offload acknowledgement information carries the information of the target offload bearer and the first configuration information, and then according to the information of the target offload bearer Determining the target offload bearer in the offloading bearer, and determining the auxiliary backhaul according to the information of the target offloading bearer and the first configuration information The link configuration information finally sends the secondary backhaul link configuration information to the third network device, and switches the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

FIG. 1 is a flowchart of a method for carrying and offloading a backhaul link according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for carrying and offloading a backhaul link according to an embodiment of the present invention; FIG. 4 is a flowchart of interaction between a first network device, a second network device, and a third network device according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a first network device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another first network device according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of another first network device according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a first network device according to an embodiment of the present invention; Schematic diagram of a second network device;

FIG. 9 is a schematic structural diagram of another second network device according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a third network device according to an embodiment of the present invention; FIG. 12 is a schematic structural diagram of a second network device according to an embodiment of the present invention; FIG. 13 is a schematic structural diagram of a third network device according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

FIG. 1 is a flowchart of a method for carrying and offloading a backhaul link according to an embodiment of the present invention. As shown in Figure 1, the method includes:

Step S100: The first network device determines a to-be-distributed bearer on the primary backhaul link, where the primary backhaul link is a link between the first network device and the second network device.

Step S101: The first network device sends a bearer offloading request message to the second network device, where the bearer offloading request message carries the information to be offloaded and the first identity information of the third network device, so that the second network device is configured according to the bearer. The offload request information determines the bearer offload confirmation information.

Step S102: The first network device receives the bearer offload acknowledgement information sent by the second network device, where the bearer offload acknowledgement information carries the information of the target offload bearer and the first configuration information, where the first configuration information is used to indicate that the first auxiliary backhaul chain is established. The radio resource control configuration required for the path, the first secondary backhaul link is a link between the third network device and the second network device, and the first secondary backhaul link is used to transmit the service data on the target offloaded bearer.

Step S103: The first network device determines the target offload bearer in the to-be-offloaded bearer according to the information of the target offloaded bearer, and determines the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information.

Step S104: The first network device sends the secondary backhaul link configuration information to the third network device, so that the third network device establishes the first secondary backhaul link and the second secondary backhaul link according to the secondary backhaul link configuration information, and A bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link is established, where the second secondary backhaul link is a link between the third network device and the first network device.

Step S105: The first network device sends the service data on the target offloading bearer to the third network device by using the second secondary backhaul link.

The executor of each of the foregoing steps may be a first network device having an information processing function. In practice, the first network device may be a base station or a low power node. Specifically, when the first network device is a base station, the second network device is a low power node; when the first network device is a low power node, the second network device is a base station. In addition, the foregoing third network device may be a user equipment (User Equipment, UE for short) or a UE. Functional low power node. Specific to implementation, it can be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the first network device first determines a to-be-distributed bearer on the primary backhaul link. The primary backhaul link is a link between the first network device and the second network device, and the to-be-offloaded bearer is a bearer that needs to be configured by the first network device according to the actual transmission condition to be used to offload the service data through the newly established auxiliary backhaul link. It can be either a single bearer or a bearer list, that is, includes multiple bearers, and embodiments of the present invention are not limited. In practice, the primary backhaul link can be a direct link, a multi-hop link, or a backhaul link using other technology types such as wireline technology, WiFi technology, microwave technology, and the like.

Further, after the first network device determines the offloaded bearer, the first network device may send a bearer offload request message to the second network device. The bearer offloading request message carries the information to be offloaded and the first identity information of the third network device, where the first identity information is used to identify the third network device, and the information to be offloaded is used to indicate the offloading bearer. And causing the second network device to complete the admission control according to the bearer offloading request message, that is, determining whether the data on the offloading bearer can be switched to the auxiliary backhaul link established by the third network device according to the current network resource usage status and the transmission capability. transmission. If the second network device confirms that the handover is possible, the to-be-offloaded bearer is confirmed as the target offload bearer and the bearer offload acknowledgement information is determined. The first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link is a link between the third network device and the first network device, and the second secondary backhaul chain Together with the first secondary backhaul link, the path constitutes the above-mentioned newly established auxiliary backhaul link, which is defined below.

Optionally, the information about the to-be-offloaded bearer may be the identifier information to be offloaded, such as the data radio bearer (DRB) of the interface to be offloaded between the second network device and the fourth network device. The identifier or the quality of service level identifier (QS) identifier; may be the DRB identifier or the QCI identifier on the primary backhaul link; or other user plane bearer identifiers that can be used on the primary backhaul link. The first identity identifier may be a device identity code pre-approved by the first network device and the second network device, and after receiving the first identity identifier information, the second network device may determine the third network according to the device identity code. device.

Further, the first network device may receive the bearer offload sent by the second network device. Confirmation information. The bearer offload acknowledgement information carries the information of the target offload bearer and the first configuration information. The target offload bearer is a bearer that can be offloaded by the second network device according to the bearer offload request message. Specifically, the target offload bearer is a to-be-distributed bearer that can perform the offloading operation determined by the second network device after the admission control. When the to-be-offloaded bearer information of the first network device in the bearer offloading request message includes only one bearer information, the target offloaded bearer information is the bearer information; When carrying information, the target offload bearer information may be one or more of the types of bearer information. It should be noted that the target offload bearer and the to-be-offloaded bearer may refer to a single bearer or a bearer list. The present invention does not limit the number of bearers indicated by the two nouns. The following descriptions are used herein.

The information of the target offloading bearer is used to indicate the target offloading bearer, and the first configuration information is used to indicate radio resource control required for establishing the first secondary backhaul link (Radio)

Resource Control, referred to as RRC) configuration. Optionally, the information about the target offloading bearer may be a DRB identifier or a QCI identifier of an interface between the second network device and the fourth network device; and may be a DRB identifier or a QCI identifier on the primary backhaul link; Other user plane bearer identities that can be used on the primary backhaul link. Further, after receiving the bearer acknowledgement information, the first network device may determine the target offload bearer in the to-be-offloaded bearer according to the information of the target offloaded bearer, and determine the auxiliary backhaul chain according to the information of the target offloaded bearer and the first configuration information. Road configuration information.

Further, the first network device may send the foregoing secondary backhaul link configuration information to the third network device, so that the third network device establishes the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, so that the service data on the target offloaded bearer can be switched from the primary backhaul link to the first secondary backhaul link and the first On the secondary backhaul link.

Further, the first network device can switch the service data on the target offloaded bearer to the second secondary backhaul link, thereby reducing the bearer burden on the primary backhaul link. In the technical solution of the embodiment, the first network device determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, and then Determining a target offload bearer according to the information of the target offloaded bearer, and determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally, to the third network. The device sends the secondary backhaul link configuration information, and switches the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 2 is a flowchart of a bearer offloading method of a backhaul link according to an embodiment of the present invention. As shown in Figure 2, the method includes:

Step S200: The second network device receives the bearer offloading request information sent by the first network device, where the bearer offloading request message carries the information to be offloaded bearer and the first identity identifier information of the third network device.

Step S201: The second network device determines the bearer offload acknowledgement information according to the bearer offload request information, where the bearer offload acknowledgement information carries the information of the target offload bearer and the first configuration information.

Step S202: The second network device sends bearer offload acknowledgement information to the first network device. Step S203: The second network device establishes a first secondary backhaul link with the third network device. Step S204: The second network device receives the service data on the target offloading bearer by using the first secondary backhaul link.

The executor of each of the above steps may be a second network device having an information processing function. In practice, the second network device may be a base station or a low power node. Specifically, when the second network device is a base station, the first network device is a low power node; when the second network device is a low power node, the first network device is a base station. In addition, the foregoing third network device may be a dual-powered UE or a low-power node with UE function. Specific to implementation, it can be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the second network device may receive the bearer offloading request information sent by the first network device. The bearer offloading request message carries the information to be offloaded and the first identity information of the third network device. The to-be-distributed bearer is a bearer that needs to be configured by the first network device according to the actual transmission condition, and needs to be used to carry the service data by using the newly established auxiliary backhaul link, which may be a single bearer or a bearer list, that is, includes multiple bearers, The embodiments of the invention are not limited. In practice, the primary backhaul link can be a direct link, a multi-hop link, or a backhaul link using other technology types such as wireline technology, WiFi technology, microwave technology, and the like.

Further, the first identity information is used to identify the third network device, which is to be offloaded. The information is used to indicate that the bearer to be offloaded, and the second network device can complete the admission control according to the bearer offload request message, that is, whether the data on the offloaded bearer can be switched to the third according to the current network resource usage status and the transmission capability. Auxiliary backhaul link transmission established by the network device. If the second network device confirms that the handover is possible, the to-be-offloaded bearer is confirmed as the target offloaded bearer and the bearer offloaded acknowledgement information is determined.

Optionally, the information about the to-be-offloaded bearer may be the identifier information to be offloaded, such as the DRB identifier or the QCI identifier of the interface to be offloaded between the second network device and the fourth network device; The DRB identity or QCI identity on the road; other user plane bearer identities that can be used on the primary backhaul link. The first identity identifier may be a device identity code pre-approved by the first network device and the second network device, and after receiving the first identity identifier information, the second network device may determine the third network according to the device identity code. device. Further, the second network device may determine the bearer offload acknowledgement information according to the bearer offload request information. The bearer offloading request information carries the information about the to-be-distributed bearer that the first network device requests to be offloaded. Therefore, the second network device may determine the bearer offloading acknowledgement information according to the actual situation, where the bearer offloading acknowledgement information carries the target offloaded bearer. Information and first configuration information. The target offload bearer is a bearer that can be offloaded by the second network device according to the bearer offload request message.

The information of the target offloading bearer is used to indicate the target offloading bearer, and the first configuration information is used to indicate an RRC configuration required for establishing the first secondary backhaul link. Optionally, the information about the target offloading bearer may be a DRB identifier or a QCI identifier of an interface between the second network device and the fourth network device; and may be a DRB identifier or a QCI identifier on the primary backhaul link; Other user plane bearer identities that can be used on the primary backhaul link.

Further, after the second network device determines the bearer offload acknowledgement information, the bearer offload acknowledgement information may be sent to the first network device, so that the first network device may determine the target offload bearer according to the information, and the target is The service data on the offloaded bearer is offloaded to the first secondary backhaul link and the second secondary backhaul link.

Further, after determining the bearer offload acknowledgement information, the second network device may establish a first secondary backhaul link with the third network device, and then the second network device may receive the target offload bearer through the first secondary backhaul link. Business data on.

In the technical solution of the embodiment, the second network device receives the sending by the first network device. The bearer offloading request information is carried, and the bearer offloading acknowledgement information is determined according to the bearer offloading request information, and the bearer offloading acknowledgement information is sent to the first network device. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 3 is a flowchart of a method for carrying and offloading a backhaul link according to an embodiment of the present invention. As shown in FIG. 3, the method includes:

Step S300: The third network device receives the secondary backhaul link configuration sent by the first network device.

I Ft self.

Step S301: The third network device establishes a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and establishes a bearer between the first secondary backhaul link and the second secondary backhaul link. The mapping relationship, the first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link is a link between the third network device and the first network device.

Step S302: The third network device receives the service data on the target offloading bearer by using the second secondary backhaul link.

Step S303: The third network device sends the service data on the target offloading bearer to the second network device by using the first secondary backhaul link.

The executor of each of the foregoing steps may be a third network device having an information processing function. In practice, the third network device may be a low-power node having a dual-connection function UE or a UE-enabled low-power node, UE relay. (UE Relay) and so on. The first network device and the second network device may be a base station or a low power node. Specifically, when the second network device is a base station, the first network device is a low power node; when the second network device is a low power node, the first network device is a base station. Specific to implementation, it can be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the third network device may receive the auxiliary backhaul link configuration information sent by the first network device.

Further, the third network device may establish a first secondary backhaul link with the second network device according to the auxiliary backhaul link configuration information, establish a second secondary backhaul link with the first network device, and establish a first secondary backhaul. Bearer mapping relationship between the link and the second secondary backhaul link, the bearer The mapping relationship is used to map the bearer of the first secondary backhaul link to the corresponding bearer of the second secondary backhaul link to ensure that the service data can be transmitted from the first secondary backhaul link to the second secondary backhaul link.

Further, after the first secondary backhaul link and the second secondary backhaul link are established, the third network device may receive the service data on the target offloaded bearer sent by the first network device by using the second secondary backhaul link, and then The service data on the target offloaded bearer is sent to the second network device by using the first secondary backhaul link. Specifically, the third network device may receive the service data on the target offloaded bearer sent by the first network device by using the downlink DRB on the second secondary backhaul link, and send the uplink DRB on the first secondary backhaul link to the second network. The device sends the service data on the target offloaded bearer.

It should be noted that the sequence of establishing the first secondary backhaul link and the second secondary backhaul link and the bearer mapping relationship between them is not limited herein.

In the technical solution of the embodiment, the third network device receives the secondary backhaul link configuration information sent by the first network device, and then establishes the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, and then receiving the service data on the target offloaded bearer through the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 4 is a flowchart of interaction between a first network device, a second network device, and a third network device according to an embodiment of the present invention. In practice, the first network device may be a base station, the second network device is a low power node, the fourth network device is a user equipment UE, and the fifth network device is a Serving-Gate Way (S-GW); A network device may be a low power node, a second network device is a base station, a fourth network device is a serving gateway S-GW, and a fifth network device is a user equipment UE. In this embodiment, only the first case is taken as an example for detailed description. In the second case, the interaction process between the first network device and the second network device is the same as the first case, and details are not described herein again. It is also within the scope of the invention. In addition, the third network device in this embodiment may be a dual connectivity function UE or a low power node with UE function, UE Relay, and the like. For convenience of description, several interfaces are defined as follows: The first interface is an interface between a low power node and a base station, and the second interface is a low power node and a fourth network device. The third interface is an interface between the low power node and the third network device, the fourth interface is an interface between the base station and the third network device, and the fifth interface is an interface between the base station and the fifth network device. . As shown in FIG. 4, the method includes:

The first network device is a base station, and the second network device is a low power node, or the first network device is a low power node, and the second network device is a base station,

Step S400: The base station measures a load value on the main backhaul link.

The execution of the above steps is a base station, which may be implemented by software, hardware, or a combination of hardware and software.

Specifically, the base station may measure the load value on the primary backhaul link, and if the load value is greater than the set first threshold, the base station determines the to-be-diverted bearer on the primary backhaul link. The load value includes: at least one of a physical resource block (Physical Resource Block, PRB for short) usage rate, a PRB usage rate of each bearer, and a cached data amount of the base station.

Step S401: The base station determines a to-be-distributed bearer on the primary backhaul link.

Specifically, the base station may prioritize the bearers on the primary backhaul link, and the delay sensitive value exceeds a preset second threshold, the buffered data volume exceeds the set third threshold, and the delay sensitive value A carrier that exceeds the preset second threshold and the amount of buffered data exceeds the set third threshold is selected as the offloaded bearer.

Step S402: The base station sends a bearer offload request message to the low power node.

Specifically, the bearer offloading request message carries the information to be offloaded, the first identity information of the third network device, and the first bearer mapping rule of the low power node. The information is used to request the low power node to establish the auxiliary first backhaul link and the second secondary backhaul link by using the indicated third network device, and use the provided first bearer mapping rule to divide the service data on the bearer to be carried. Switch to the above two secondary backhaul links for transmission. The description of the first identity information is the same as that of step S 100, and details are not described herein again.

Further, the information to be offloaded bearer may include the second identity to be offloaded Information. For example, the second identity information may be a DRB identity or a QCI to be offloaded, or may be another user plane bearer identifier that can be used on the primary backhaul link. Specifically, the second identity information may be a DRB identifier or a QCI to be offloaded to be carried on the second interface, where the low power node is used to indicate that the low power node uses the service data on the bearer identified by the DRB or the QCI on the second interface. The backhaul link is switched to the first secondary backhaul link and the second secondary backhaul link for transmission; the second identity identification information may also be the DRB identifier on the first interface or the user plane bearer identifier on the QCI or other first interface. And indicating that the low-power node needs to switch the service data on all the bearers on the second interface corresponding to the DRB identifier or the bearer corresponding to the QCI on the primary backhaul link from the primary backhaul link to the first secondary backhaul link. The road and the second secondary backhaul link are transmitted.

Further, the first bearer mapping rule includes at least one of a first QCI, a second QCI, a mapping relationship between the first QCI and the second QCI. Specifically, the first QCI is a QCI that the base station can provide for the to-be-diverted bearer on the fourth interface, and the second QCI is the QCI that the base station requests the low-power node to provide the to-be-clustered bearer on the third interface. The mapping relationship between the first QCI and the second QCI represents a candidate mapping relationship acceptable to the base station, each option indicating a bearer QoS scheduling level that the base station can establish on the fourth interface, and requesting the low power node to be established on the third interface. Bears the QoS scheduling level.

It should be noted that the foregoing first QCI may also be a newly defined scheduling level identifier, where the identifier represents a maximum delay that the base station can bear on the fourth interface, and the transmission rate is a guaranteed bit rate (Gumnteed Bite) Rate, abbreviated as GBR), non- Gumnteed Bite Rate (non-GBR) or packet loss rate; the second QCI may also be a newly defined scheduling level identifier, which identifies the base station in the third The maximum delay and transmission rate that can be tolerated by the to-be-distributed bearer established on the interface are information such as GBR or non-GBR and packet loss rate.

In addition, if the target offloading bearer is a downlink bearer, the first secondary backhaul link transmits the data to be offloaded by the uplink DRB.

Step S403: The low power node receives the bearer offload request information sent by the base station.

The execution of the above steps is a low-power node, which can be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the description of the step is the same as step S200, and details are not described herein again. Step S404: The low-power node determines, according to the bearer offloading request information, the bearer offloading acknowledgement. The execution entity of the foregoing step is a low-power node, which may be specifically implemented by software or hardware.

Specifically, the low-power node obtains the to-be-divided bearer information and the first identity-identification information of the third network device from the bearer offloading request information, and determines the target offloading bearer according to the to-be-distributed bearer information and the actual situation, and determines the bearer offloading acknowledgement. The information is used to instruct the first network device to determine the target offload bearer and the auxiliary link configuration information according to the bearer offload acknowledgement information. In addition, the low power node further determines the identity of the third network device according to the first identity information.

The bearer offload acknowledgement information carries the second bearer mapping rule in addition to the information carrying the target offload bearer and the first configuration information. The description of the first configuration information is the same as that of step S 100, and details are not described herein again. After the low-power node determines the target offload bearer, the first configuration information may be determined, that is, the first secondary backhaul link is established. Required RRC configuration.

Further, the information of the target offloaded bearer may include the third identity identification information of the target offloaded bearer. For example, the third identity information may be a DRB identifier or a QCI identifier of an interface between the second network device and the fourth network device; may be a DRB identifier or a QCI identifier on the primary backhaul link; Other user plane bearer identities that can be used on the primary backhaul link. Specifically, the third identity information may be a DRB identifier or a QCI that is carried by the target offload on the second interface, and is used to indicate that the low power node uses the service data on the bearer identified by the DRB or the QCI on the second interface by the primary device. The backhaul link is switched to the first secondary backhaul link and the second secondary backhaul link for transmission; the third identity identification information may also be a DRB identifier or QCI on the first interface, which is used to indicate that the low power node needs to be the primary The service data on all bearers on the second interface corresponding to the DRB identifier or the bearer corresponding to the QCI on the backhaul link is switched from the primary backhaul link to the first secondary backhaul link and the second secondary backhaul link.

Further, the second bearer mapping rule includes at least one of a third QCI, a fourth QCI, a third QCI, and a fourth QCI, and the third QCI is a low-power node capable of offloading the target on the third interface. Carrying the provided QCI, the fourth QCI is the QCI that the low-power node requests the base station to provide for the target offload bearer on the fourth interface.

It should be noted that the foregoing third QCI may also be a newly defined scheduling level identifier, where The identifier identifies the maximum delay that the low-power node can bear on the third interface, and the transmission rate is GBR, non-GBR, or packet loss rate. The fourth QCI may also be a newly defined scheduling level. The identifier indicates that the maximum delay that the low-power node can bear on the fourth interface can be tolerated, and the transmission rate is information such as GBR or non-GBR, packet loss rate, and the like.

In addition, the foregoing first configuration information needs to be sent by the low power node to the base station, and then forwarded by the base station to the third network device.

Step S405: The low power node updates the interface mapping relationship according to the first bearer mapping rule. The execution of the above steps is a low-power node, which can be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the bearer offloading request information carries the first bearer mapping rule, so the low power node may update the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update the second interface. A bearer mapping relationship with the third interface to switch the service data on the target offloaded bearer from the primary backhaul link to the first secondary backhaul link.

Step S406: The low power node sends the bearer offload acknowledgement information to the base station.

Specifically, the description of the step is the same as step S202, and details are not described herein again.

Step S407: The base station receives the bearer offload acknowledgement information sent by the low power node.

Specifically, the description of the step is the same as step S102, and details are not described herein again.

Step S408: The base station determines the target offload bearer in the to-be-offloaded bearer according to the information of the target offloaded bearer, and determines the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information.

Specifically, after receiving the bearer offload acknowledgement information, the base station may carry the information of the target offload bearer, that is, the identifier of the target offload bearer, so the base station may The target offload bearer is determined in the to-be-distributed bearer according to the information. Specific determination methods such as

As described in S403, it will not be described here.

Further, the base station may determine the secondary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information carried in the bearer offload acknowledgement information. The auxiliary backhaul link configuration information is used to indicate that the third network device establishes a first secondary backhaul link and a second secondary backhaul link, and includes a mapping list for indicating a bearer mapping relationship between the third interface and the fourth interface. And the first configuration information and the RRC configuration for indicating the third network device at the fourth interface. It should be noted that the target offload bearer is a bearer on the primary backhaul link. After the target offload bearer is switched to the first secondary backhaul link and the second secondary backhaul link, it is defined herein for the convenience of the following description. The uplink target offload bearer and the downlink target offload bearer, where the uplink target offload bearer refers to the uplink DRB established by the third network device on the first secondary backhaul link according to the auxiliary backhaul link configuration information, and the third network device passes the uplink target offload bearer The data of the target offloaded bearer is transmitted to the low power node; the downlink target offloaded bearer refers to the downlink DRB established by the third network device on the second secondary backhaul link according to the auxiliary backhaul link configuration information, and the third network device passes the downlink target offloaded bearer. The receiving base station transmits data on the target offloading bearer. As a possible implementation manner, the foregoing mapping list may be a mapping of the target offloading bearer from the QCI of the third interface to the QCI of the fourth interface. In practice, the third network device may store the mapping relationship. After receiving the service data from the downlink target offloading bearer of the fourth interface, the third network device may search for the foregoing mapping list according to the QoS scheduling level of the downlink target offloading bearer, and determine a mapping list. The uplink target offload bearer on the third interface corresponding to the uplink interface, wherein the QoS scheduling level of the uplink target offload bearer must satisfy the mapping relationship, and send the buffered data to the low power node through the uplink bearer. For example, the mapping list may be in the form shown in Table 1, taking the value of the first row as an example, and QCI=2 of the third interface corresponds to QCI=7 of the fourth interface, when the third network device is from the fourth interface. After receiving the service data on the downlink DRB of QCI=7, after checking the table, the cached data may be sent to the low-power node through the uplink DRB of the QCI=2 of the third interface.

Table 1

As another feasible implementation manner, the foregoing mapping list may be a target offload bearer from Mapping of the uplink DRB of the third interface to the downlink DRB of the fourth interface. In practice, the third network device may store the mapping relationship. After receiving the service data from the downlink target offloading bearer of the fourth interface, the third network device may search for the mapping list according to the DRB identifier of the downlink target offloading bearer, and determine a mapping relationship. The uplink target offload bearer on the corresponding third interface, wherein the DRB identifier of the uplink target offload bearer must satisfy the mapping relationship, and send the buffered data to the low power node through the uplink target offload bearer. For example, the mapping list may be in the form shown in Table 2. Taking the value of the first row as an example, the uplink DRB=1 of the third interface corresponds to the downlink DRB=3 of the fourth interface, when the third network device After receiving the service data on the downlink DRB=3 of the fourth interface, after checking the table, the buffered data may be sent to the low-power node by using the uplink DRB=1 bearer of the fourth interface.

Table 2

As a feasible implementation manner, the foregoing mapping list may be a mapping of a target offloading bearer from a QCI of an uplink DRB of the third interface to a Differentiated Services Code Point (DSCP) of a downlink carried by the fourth interface. In practice, the third network device may store the mapping relationship, and after receiving the service data of the downlink target offloaded bearer from the fourth interface, parsing the data of the Internet Protocol (IP) layer to obtain the IP header. The DSCP value is obtained, and the mapping table is searched according to the DSCP value, and the service data is sent to the uplink target offload bearer of the third interface that meets the corresponding QoS requirement.

Step S409: The base station updates the interface mapping relationship according to the second bearer mapping rule.

Specifically, as described in step S404, the base station may update the bearer mapping relationship between the first interface and the fifth interface according to the second bearer mapping rule, and update the bearer mapping relationship between the fifth interface and the fourth interface, The service data on the target offloaded bearer is switched from the primary backhaul link to the second secondary backhaul link.

Step S410: The base station sends the secondary backhaul link configuration information to the third network device. The execution body of the foregoing steps is a base station, and may be implemented by software, hardware, or a combination of hardware and software.

Specifically, the description of the step is the same as step S104, and details are not described herein again.

Step S411: The third network device receives the secondary backhaul link configuration information sent by the base station. The execution body of the foregoing step is a third network device, which may be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the description of the step is the same as step S300, and details are not described herein again.

Step S412: The third network device establishes a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and establishes a bearer between the first secondary backhaul link and the second secondary backhaul link. Mapping relations.

The execution body of the foregoing step is a third network device, which may be implemented by software, or hardware, or a combination of hardware and software.

Specifically, the foregoing auxiliary backhaul link configuration information includes a mapping list for indicating a bearer mapping relationship between the third interface and the fourth interface, first configuration information, and RRC for indicating that the third network device is in the fourth interface. The third network device may establish a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link according to the foregoing mapping list, and establish a second with the first network device according to the foregoing auxiliary backhaul link configuration information. The secondary backhaul link establishes a first secondary backhaul link with the second network device, and the sequence of establishing the first secondary backhaul link and the second secondary backhaul link is not limited herein.

Step S413: The base station sends the service data on the target offloading bearer to the third network device by using the second secondary backhaul link.

Specifically, the description of the step is the same as step S105, and details are not described herein again.

Step S414: The third network device receives the service data on the target offloading bearer by using the second secondary backhaul link.

Specifically, the description of the step is the same as step S302, and details are not described herein again.

Step S415: The third network device sends the destination to the low power node by using the first secondary backhaul link. The business data on the standard stream is carried.

Specifically, after the third network device receives the service data on the target offloaded bearer from the second secondary backhaul link, it needs to send the service data on the target offloaded bearer to the low power node through the first secondary backhaul link.

Step S416: The low power node receives the service data on the target offload bearer through the first secondary backhaul link.

Specifically, after the third network device sends the service data on the target offloaded bearer from the first secondary backhaul link to the low power node, the low power node may receive the service data on the target offloaded bearer.

In practice, the base station and the low-power node may also switch the target offload bearer to the first secondary backhaul link and the second secondary backhaul link by using an Operation Management Maintenance (OAM) entity negotiation, the base station, and the low The power node and the third network device require respective updated bearer mapping rules.

Specifically, after the base station sends the bearer request information to the OAM to which the base station belongs, after the OAM of the base station establishes a mapping relationship with the OAM of the relay, the base station may send a mapping relationship update message to the base station. In the first mode, the mapping relationship update message may include a mapping relationship deletion list of the first interface and the fifth interface, where each selection item indicates the to-be-distributed bearer that needs to be stopped on the first interface and the fifth interface. The mapping relationship update rule may include a mapping relationship adding list of the fourth interface and the fifth interface, where each option in the list indicates that the fourth interface and the fifth interface need to be added. a bearer mapping rule, where the mapping rule may be a mapping of a DSCP (or TEID) of the fifth interface to a QCI of the fourth interface, where the added mapping relationship is used to switch the to-be-offloaded bearer to the first secondary backhaul link and the second secondary In the third mode, the mapping relationship update message may include a bearer mapping rule of the third network device, where the bearer mapping rule indicates a bearer mapping that the third network device needs to establish on the third interface and the fourth interface. The mapping rule may be a mapping of the QCI of the third interface to the QCI of the fourth interface, and the DRB identifier of the third interface to the fourth interface The DRB DSCP mapping or fourth interface to a third interface mapping of QCI Shoot any one of them. Certainly, the mapping relationship update message sent by the 0AM of the foregoing base station to the base station may also be any one or more of the foregoing first mode, second mode, and third mode.

Further, the 0AM of the low power node can send a mapping relationship update message to the low power node. In the first manner, the mapping relationship update message may include a mapping relationship deletion list of the second interface and the first interface, where each option in the list indicates the to-be-distributed bearer that needs to be stopped on the second interface and the first interface. The second embodiment, the mapping relationship update message may include a mapping relationship adding list of the second interface and the third interface, where each option in the list indicates that the second interface and the third interface need to be added. a bearer mapping rule, the mapping rule may be a mapping of a QCI of the second interface to a QCI of the third interface, a mapping of the DRB identifier of the second interface to the DRB of the third interface, a QCI of the second interface, or a DSCP of the third interface or DSCP of the second interface to any of the QCIs of the third interface. The newly added bearer mapping rule is used to switch the to-be-offloaded bearer to the auxiliary backhaul link, where the auxiliary backhaul link is composed of the first auxiliary backhaul link and the second secondary backhaul link; The mapping relationship update message may include a bearer mapping rule of the third network device, where the bearer mapping rule indicates a bearer mapping rule that the third network device needs to establish on the third interface and the fourth interface, and the mapping rule may be the third interface. The mapping of the QCI to the QCI of the fourth interface, the mapping of the DRB identifier of the third interface to the DRB of the fourth interface, or the mapping of the QCI of the third interface to the DSCP of the fourth interface. Of course, the mapping relationship update message that the OAM of the low-power node can send to the low-power node may also be any one or more of the foregoing first mode, the second mode, and the third mode.

After the negotiation of the bearer mapping rule is completed, the low power node and the base station may determine, according to the bearer mapping rule, the configuration of the secondary backhaul link of the third network device on the third interface and the fourth interface, where they may send the information to the third network device. The secondary backhaul link configuration information. Specifically, the secondary backhaul link information sent by the base station to the third network device includes the RRC configuration information on the fourth interface, and optionally, the secondary backhaul link information sent by the base station to the third network device may further include the third A bearer mapping rule established by the network device on the third interface and the fourth interface. The auxiliary backhaul link information sent by the low power node to the third network device includes the RRC configuration information on the third interface. Optionally, the secondary backhaul link information sent by the low power node to the third network device may further include A bearer mapping rule established by the third network device on the third interface and the fourth interface.

The following interactive process is briefly described by a specific example.

Before the offloading, the low power node communicates with the base station only through the main backhaul link. The bearers of different QoS levels on the second interface are mapped to the bearers of different QoS levels on the first interface, where the bearer mapping relationship between the second interface and the first interface may be many-to-one, and the mapping relationship may be selectively set. Table 4 is shown. The QoS level corresponding to each bearer is identified by a QCI parameter, and the services on the bearers of the second interface QCI=1 and QCI=4 are respectively transmitted on the bearers of the first interface QCI=1 and QCI=4, and the second The services on the bearers of the interfaces QCI=6 and 8 are mapped to the bearers of QCI=6 on the first interface. The S1 signaling or the X2 signaling of the UE under the coverage of the low power node is mapped to the bearer transmission on the QCI=5 on the first interface.

Table 4

When the traffic of the UE under the coverage of the low-power node is large, the main backhaul capacity is limited, and all service data cannot be scheduled in time, and the service that cannot be scheduled in time is stored in the data of the base station or the low-power node. The buffer area, when the cache time exceeds the preset threshold, is discarded as the timeout data.

In order to avoid this, a bearer offloading method of the above backhaul link may be employed.

Specifically, the base station can measure the load status of the primary backhaul link. When the base station finds that the primary backhaul link load exceeds a preset first threshold, the base station can confirm that the primary backhaul link is overloaded and triggers the offloading operation.

Further, the base station can sort the different bearers on the first interface according to the delay and the amount of buffered data, and find that the bearer with QCI=6 is least sensitive to the delay. The bearers of QCI=6 and 8 on the second interface multiplex the bearers of QCI=6 on the first interface, and the bearer traffic of QCI=8 on the second interface is the largest. Therefore, the base station confirms the bearer with QCI=8 on the second interface as the to-be-offloaded bearer, and hopes to switch the to-be-split bearer with QCI=8 on the second interface from the primary backhaul link to the first secondary backhaul link and the second secondary backhaul. Transfer on the link. After confirming that the offloading bearer is to be carried out, in order to ensure that the first secondary backhaul link and the second secondary backhaul link meet the corresponding QoS requirements, the base station initiates a traffic off negotiation process to the low power node, in which the low power node and the base station are in accordance with The QoS requirements of the offloaded bearer determine the bearer configuration established on the third interface and the fourth interface, and the corresponding mapping relationship between the two bearers, and map the mapping The relationship is notified to the third network device, so that the first secondary backhaul link and the second secondary backhaul link are satisfied as a whole.

QCI=8 QoS requirements. After the negotiation, the low power node, the base station, and the third network device update the service mapping rule, and complete the establishment or update of the corresponding bearer according to the bearer mapping rule and the RRC configuration information on the third interface and the fourth interface. After the traffic distribution configuration is completed, the bearer relationship between the first secondary backhaul link, the second secondary backhaul link, and the primary backhaul link is as shown in Table 5, and the bearers of QCI=1, QCI=4, and QCI=6 on the second interface are The mapping relationship between the S1/X2 signaling and the first interface remains unchanged, but the bearer with QCI=8 on the first interface is mapped to the first secondary backhaul link and the second secondary backhaul link. The following line service is used as an example. After receiving the bearer data of the second interface QCI=8, the base station maps the data to the downlink bearer with QCI=7 on the fourth interface, and the third network device receives the QCI= on the fourth interface. After the downlink bearer transmits the data, the data is sent to the low-power node through the uplink bearer with the QCI=5, and finally the low-power node sends the received buffered data to the UE through the downlink bearer with the QCI=8 on the second interface.

table 5

In the technical solution of the embodiment, the first network device determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, and then Determining the target offload bearer according to the information of the target offloaded bearer, determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally sending the auxiliary backhaul link configuration information to the third network device, And switching the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 5 is a schematic structural diagram of a first network device according to an embodiment of the present invention. As shown in FIG. 5, the first network device 1 includes: a determining module 10, a sending module 11, and a receiving module 12.

Specifically, the determining module 10 is configured to determine a to-be-distributed bearer on the primary backhaul link, and the main backhaul The link is a link between the first network device and the second network device; the sending module 11 is configured to send a bearer offloading request message to the second network device, where the bearer offloading request message carries the information to be offloaded bearer and the third network device The first identity information is configured to enable the second network device to determine the bearer offload acknowledgement information according to the bearer offload request information. The receiving module 12 is configured to receive the bearer offload acknowledgement information sent by the second network device, where the bearer offload acknowledgement information carries the target offloaded bearer And the first configuration information, where the first configuration information is used to indicate an RRC configuration required for establishing the first secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device, The first auxiliary backhaul link is used to transmit the service data on the target offloading bearer; the determining module 10 is further configured to determine the target offloading bearer in the to be offloaded bearer according to the information of the target offloaded bearer, and according to the target offloaded bearer information and the first configuration The information determines the auxiliary backhaul link configuration information; the sending module 11 is further configured to send the auxiliary backhaul link configuration information, And causing the third network device to establish a first secondary backhaul link and a second secondary backhaul link according to the auxiliary backhaul link configuration information, and establish a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where The second secondary backhaul link is a link between the third network device and the first network device. The sending module 11 is further configured to send the service data on the target offloaded bearer to the third network device by using the second secondary backhaul link.

Further, the determining module 10 is specifically configured to: the first network device prioritizes the bearers on the primary backhaul link, the delay sensitive value exceeds a preset second threshold, and/or the amount of buffered data The bearer that exceeds the set third threshold is selected as the offloading bearer.

In the technical solution of the embodiment, the first network device 1 determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, And determining, according to the information of the target offloaded bearer, the target offload bearer, and determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally sending the auxiliary backhaul link configuration information to the third network device. And switching the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 6 is a schematic structural diagram of another first network device according to an embodiment of the present invention. As shown in FIG. 6, the first network device 2 includes: a determining module 10, a sending module 11, a receiving module 12, and an updating module 20. Determining module 10, transmitting module 11 and receiving module 12 with the previous embodiment The same, will not be described here.

Specifically, the update module 20 is configured to update, according to the second bearer mapping rule, a bearer mapping relationship between the first interface and the fifth interface, and a bearer mapping relationship between the fifth interface and the fourth interface, where the fourth interface is the first network. An interface between the device and the third network device, where the fifth interface is an interface between the first network device and the fifth network device.

In the technical solution of the embodiment, the first network device 2 determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, And determining, according to the information of the target offloaded bearer, the target offload bearer, and determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally sending the auxiliary backhaul link configuration information to the third network device. And switching the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 7 is a schematic structural diagram of still another first network device according to an embodiment of the present invention. As shown in FIG. 7, the first network device 3 includes: a determining module 10, a sending module 11, a receiving module 12, and a measuring module 30. The determining module 10, the sending module 11 and the receiving module 12 are the same as the previous embodiment, and are not described herein again.

Specifically, the measurement module 30 is configured to measure a load value on the primary backhaul link, and if the load value is greater than the set first threshold, the first network device determines the to-be-offloaded bearer on the primary backhaul link.

In the technical solution of the embodiment, the first network device 3 determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, And determining, according to the information of the target offloaded bearer, the target offload bearer, and determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally sending the auxiliary backhaul link configuration information to the third network device. And switching the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 8 is a schematic structural diagram of a second network device according to an embodiment of the present invention. Figure 8 As shown, the second network device 4 includes: a receiving module 40, a determining module 41, a sending module 42, and an establishing module 43.

Specifically, the receiving module 40 is configured to receive the bearer offloading request information sent by the first network device, where the bearer offloading request message carries the information to be offloaded bearer and the first identity identifier information of the third network device; The offloading request information determines the bearer offloading acknowledgement information, and the bearer offloading acknowledgement information carries the information of the target offloading bearer and the first configuration information; the sending module 42 is configured to send the bearer offloading acknowledgement information to the first network device by the second network device; The first secondary backhaul link is established with the third network device. The receiving module 40 is further configured to receive the service data on the target offloaded bearer by using the first secondary backhaul link.

In the technical solution of the embodiment, the second network device 4 receives the bearer offloading request information sent by the first network device, determines the bearer offloading acknowledgement information according to the bearer offloading request information, and sends the bearer offloading acknowledgement information to the first network device. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 9 is a schematic structural diagram of another second network device according to an embodiment of the present invention. As shown in FIG. 9, the second network device 5 includes: a receiving module 40, a determining module 41, a sending module 42, an establishing module 43, and an updating module 50. The receiving module 40, the determining module 41, the sending module 42, and the establishing module 43 are the same as the previous embodiment, and are not described herein again.

Specifically, the update module 50 is configured to update the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update the bearer mapping relationship between the second interface and the third interface, where the first interface is An interface between the network device and the first network device, where the second interface is an interface between the second network device and the fourth network device, and the third interface is an interface between the second network device and the third network device.

In the technical solution of the embodiment, the second network device 5 receives the bearer offload request information sent by the first network device, determines the bearer offload acknowledgement information according to the bearer offload request information, and sends the bearer offload acknowledgement information to the first network device. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 10 is a schematic structural diagram of a third network device according to an embodiment of the present invention. As shown in FIG. 10, the third network device 6 includes: a receiving module 60, an establishing module 61, and a sending module 62.

Specifically, the receiving module 60 is configured to receive the auxiliary backhaul link configuration information sent by the first network device, and the establishing module 61 is configured to establish, according to the auxiliary backhaul link configuration information, the first secondary backhaul link and the second secondary backhaul link. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link a link between the third network device and the first network device; the receiving module 60 is further configured to receive the service data on the target offloading bearer by using the second secondary backhaul link; and the sending module 62 is configured to use the first secondary backhaul link Transmitting the service data on the target offloaded bearer to the second network device.

In the technical solution of the embodiment, the third network device 6 receives the secondary backhaul link configuration information sent by the first network device, and then establishes the first secondary backhaul link and the second secondary backhaul link according to the secondary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, and then receiving the service data on the target offloaded bearer through the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements.

FIG. 11 is a schematic structural diagram of a first network device according to an embodiment of the present invention. As shown in FIG. 11, the first network device 7 includes: a processor 70, a transmitter 71, and a receiver 72.

Specifically, the processor 70 is configured to determine a to-be-offloaded bearer on the primary backhaul link, where the primary backhaul link is a link between the first network device and the second network device, and the transmitter 71 is configured to send the signal to the second network device. And carrying the offloading request message, where the bearer offloading request message carries the information to be offloaded and the first identity information of the third network device, so that the second network device determines the bearer offloading acknowledgement information according to the bearer offloading request information; Receiving the bearer offload acknowledgement information sent by the second network device, where the bearer offload acknowledgement information carries the information of the target offload bearer and the first configuration information, where the first configuration information is used to indicate the RRC configuration required to establish the first secondary backhaul link, A secondary backhaul link is a link between the third network device and the second network device, and the first secondary backhaul link is used to transmit service data on the target offloaded bearer; the processor 70 is further configured to offload the bearer information according to the target. Determining a target offload bearer in the to-be-offloaded bearer, and determining a secondary backhaul link according to the information of the target offloaded bearer and the first configuration information Configuration information; transmitter 71 And configured to send the secondary backhaul link configuration information, so that the third network device establishes the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information, and establishes the first secondary backhaul link and the second a bearer mapping relationship between the secondary backhaul links, where the second secondary backhaul link is a link between the third network device and the first network device; the transmitter 71 is further configured to use the second secondary backhaul link to the third network The device sends the service data on the target offloaded bearer.

Further, the processor 70 is further configured to: update a bearer mapping relationship between the first interface and the fifth interface, and a bearer mapping relationship between the fifth interface and the fourth interface according to the second bearer mapping rule, the fourth interface As an interface between the first network device and the third network device, the fifth interface is an interface between the first network device and the fifth network device.

Further, the processor 70 is further configured to: measure a load value on the main backhaul link, and if the load value is greater than the set first threshold, the first network device determines the to-be-diverted bearer on the primary backhaul link. .

Further, the processor 70 is specifically configured to: the first network device prioritizes the bearers on the primary backhaul link, the delay sensitive value exceeds a preset second threshold, and/or caches data. The bearer whose quantity exceeds the set third threshold is selected as the offloading bearer.

In the technical solution of the embodiment, the first network device 7 determines the to-be-offloaded bearer on the primary backhaul link, and sends a bearer offloading request message to the second network device, and then receives the bearer offloading acknowledgement information sent by the second network device, And determining, according to the information of the target offloaded bearer, the target offload bearer, and determining the auxiliary backhaul link configuration information according to the information of the target offloaded bearer and the first configuration information, and finally sending the auxiliary backhaul link configuration information to the third network device. And switching the service data on the target offloaded bearer to the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 12 is a schematic structural diagram of a second network device according to an embodiment of the present invention. As shown in FIG. 12, the second network device 8 includes a receiver 80, a processor 81, and a transmitter 82.

Specifically, the receiver 80 is configured to receive the bearer offloading request information sent by the first network device, where the bearer offloading request message carries the information to be offloaded bearer and the first identity identifier information of the third network device; The offloading request information determines the bearer offloading acknowledgement information, and the bearer offloading acknowledgement information carries the information of the target offloaded bearer and the first configuration information; the transmitter 82 The second network device sends the bearer offload acknowledgement information to the first network device; the processor 81 is further configured to: establish a first secondary backhaul link with the third network device; and the receiver 80 is further configured to use the first secondary backhaul link Receive service data on the target offloaded bearer.

Further, the processor 81 is further configured to update the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update the bearer mapping relationship between the second interface and the third interface, where the first interface is An interface between the second network device and the first network device, where the second interface is an interface between the second network device and the fourth network device, and the third interface is an interface between the second network device and the third network device .

In the technical solution of the embodiment, the second network device 8 receives the bearer offloading request information sent by the first network device, determines the bearer offloading acknowledgement information according to the bearer offloading request information, and sends the bearer offloading acknowledgement information to the first network device. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. FIG. 13 is a schematic structural diagram of a third network device according to an embodiment of the present invention. As shown in FIG. 13, the third network device 9 includes: a receiver 90, a processor 91, and a transmitter 92.

Specifically, the receiver 90 is configured to receive the secondary backhaul link configuration information sent by the first network device, and the processor 91 is configured to establish the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, where the first secondary backhaul link is a link between the third network device and the second network device, and the second secondary backhaul link a link between the third network device and the first network device; the receiver 90 is further configured to receive the service data on the target offloaded bearer through the second secondary backhaul link; the transmitter 92 is configured to pass the first secondary backhaul link Transmitting the service data on the target offloaded bearer to the second network device.

In the technical solution of the embodiment, the third network device 9 receives the secondary backhaul link configuration information sent by the first network device, and then establishes the first secondary backhaul link and the second secondary backhaul link according to the auxiliary backhaul link configuration information. And establishing a bearer mapping relationship between the first secondary backhaul link and the second secondary backhaul link, and then receiving the service data on the target offloaded bearer through the second secondary backhaul link. With the technical solution of the present invention, data on the target offloading bearer of the primary backhaul link can be offloaded to the auxiliary backhaul link when the amount of user data is large, thereby reducing the load of the primary backhaul link and satisfying the user service. QoS requirements. In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only schematic. For example, the division of the unit or module is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or modules may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or otherwise.

The modules described as separate components may or may not be physically separate. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

One of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A backhaul link bearer offloading method, characterized by including:

The first network device determines the bearer to be offloaded on the primary backhaul link, where the primary backhaul link is the link between the first network device and the second network device;

The first network device sends a bearer offload request message to the second network device, and the bearer offload request message carries the information of the bearer to be offloaded and the first identity identification information of the third network device, so that the The second network device determines the bearer offload confirmation information based on the bearer offload request information;

The first network device receives the bearer offload confirmation information sent by the second network device. The bearer offload confirmation information carries target offload bearer information and first configuration information. The first configuration information is used to indicate Radio resource control RRC configuration required to establish a first auxiliary backhaul link, the first auxiliary backhaul link being a link between the third network device and the second network device, the first auxiliary backhaul link The link is used to transmit service data on the target offload bearer;

The first network device determines the target offload bearer in the bearer to be offloaded based on the information on the target offload bearer, and determines the auxiliary backhaul link configuration based on the information on the target offload bearer and the first configuration information. information;

The first network device sends the auxiliary backhaul link configuration information to a third network device, so that the third network device establishes the first auxiliary backhaul link and the second auxiliary backhaul link according to the auxiliary backhaul link configuration information. auxiliary backhaul link, and establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the second auxiliary backhaul link is the third network device and the third network device. A link between network devices;

The first network device sends the service data on the target offload bearer to the third network device through the second auxiliary backhaul link.

2. The method according to claim 1, characterized in that the bearer offload request message also carries the first bearer mapping rule of the second network device, so that the second network device can perform the mapping according to the The bearer offload request message determines the information of the target offload bearer, updates the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and updates the bearer mapping relationship between the second interface and the third interface. The bearer mapping relationship, the first interface is an interface between the second network device and the first network device, the second interface is an interface between the second network device and the fourth network device, and the third interface is an interface between the second network device and the third network device.

3. The method according to claim 1 or 2, characterized in that the bearer offload confirmation information also carries the second bearer mapping rule of the first network device;

After the first network device determines the target offload bearer in the bearer to be offloaded according to the information about the target offload bearer, it also includes:

The first network device updates the bearer mapping relationship between the first interface and the fifth interface and the bearer mapping relationship between the fifth interface and the fourth interface according to the second bearer mapping rule, The fourth interface is an interface between the first network device and the third network device, and the fifth interface is an interface between the first network device and the fifth network device.

4. The method according to any one of claims 1 to 3, characterized in that before the first network device determines the bearer to be offloaded on the main backhaul link, it further includes:

The first network device measures the load value on the main backhaul link. If the load value is greater than a set first threshold, the first network device determines the load value on the main backhaul link. Diversion load.

5. The method according to claim 4, wherein the load value includes: physical resource block PRB usage on the main backhaul link, PRB usage of each bearer and the first network device At least one of the amount of cached data.

6. The method according to any one of claims 1 to 5, characterized in that the first network device determines the bearer to be offloaded on the main backhaul link, specifically including:

The first network device prioritizes the bearers on the main backhaul link so that the delay sensitivity value exceeds a preset second threshold, and/or the amount of cached data exceeds a set third threshold. The limit bearer is selected as the bearer to be diverted.

7. The method according to any one of claims 1 to 6, characterized in that the information to be offloaded includes the second identity identification information to be offloaded.

8. The method according to any one of claims 1 to 7, characterized in that the information carried by the target offload includes the third identity identification information carried by the target offload.

9. The method according to any one of claims 2 to 8, characterized in that the first bearer mapping rule includes: a first quality of service level identifier QCI, a second QCI, the first QCI At least one of the mapping relationships with the second QCI, the first QCI is the QCI that the first network device can provide for the bearer to be offloaded on the fourth interface, and the second QCI is The first network device requests the QCI provided by the second network device for the bearer to be offloaded on the third interface.

10. The method according to any one of claims 3 to 9, characterized in that, the second bearer mapping rule: third QCI, fourth QCI, the mapping relationship between the third QCI and the fourth QCI At least one, the third QCI is the QCI that the second network device can provide for the target offload bearer on the third interface, and the fourth QCI is the first QCI requested by the second network device. The network device provides the target offload bearer on the fourth interface.

11. The method according to any one of claims 1 to 10, characterized in that the auxiliary backhaul link configuration information includes: used to indicate the bearer mapping relationship between the third interface and the fourth interface. The mapping list, the first configuration information and the RRC configuration used to indicate the third network device on the fourth interface;

The mapping list includes: mapping of the target offload bearer from the QCI of the third interface to the QCI of the fourth interface, mapping of the target offload bearer from the uplink data radio bearer DRB of the third interface to the QCI of the fourth interface. The mapping of the downlink DRB of the fourth interface, the mapping of the target offload bearer from the downlink DRB of the third interface to the uplink DRB of the fourth interface, the mapping of the target offload bearer from the uplink DRB of the third interface At least one of the mappings of the QCI to the differentiated services code point DSCP of the downlink bearer of the fourth interface.

12. The method according to any one of claims 1 to 11, characterized in that, if the first network device is a base station, the second network device is a low-power node, and the fourth network device is a user equipment UE, the fifth network device is a serving gateway S-GW; or, the first network device is a low-power node, then the second network device is a base station, and the fourth network device is a serving gateway S-GW. , the fifth network device is user equipment UE.

13. A backhaul link bearer offloading method, characterized by including:

The third network device receives the auxiliary backhaul link configuration information sent by the first network device; the third network device establishes the first auxiliary backhaul link and the second auxiliary backhaul link according to the auxiliary backhaul link configuration information, and Establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the first auxiliary backhaul link is the third network device and the a link between second network devices, where the second auxiliary backhaul link is a link between the third network device and the first network device;

The third network device receives the service data on the target offload bearer through the second auxiliary backhaul link;

The third network device sends the service data on the target offload bearer to the second network device through the first auxiliary backhaul link.

14. A backhaul link bearer offloading method, characterized by including:

The second network device receives the bearer offload request information sent by the first network device, and the bearer offload request message carries the information about the bearer to be offloaded and the first identity identification information of the third network device;

The second network device determines bearer offload confirmation information based on the bearer offload request information, and the bearer offload confirmation information carries target offload bearer information and first configuration information;

The second network device sends the bearer offload confirmation information to the first network device; the second network device establishes a first auxiliary backhaul link with the third network device; the second network device uses the third A secondary backhaul link receives service data on the target offload bearer.

15. The method according to claim 14, wherein the bearer offload request message also carries the first bearer mapping rule of the second network device;

After the second network device determines the bearer offload confirmation information based on the bearer offload request information, it also includes:

The second network device updates the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and updates the bearer mapping relationship between the second interface and the third interface. An interface is an interface between the second network device and the first network device, the second interface is an interface between the second network device and the fourth network device, and the third interface is an interface between the second network device and the first network device. The interface between the second network device and the third network device.

16. A first network device, characterized by: including:

A determination module, configured to determine the bearer to be offloaded on the main backhaul link, where the main backhaul link is the link between the first network device and the second network device; A sending module, configured to send a bearer offload request message to the second network device, where the bearer offload request message carries the information of the bearer to be offloaded and the first identity identification information of the third network device, so that the third network device can The second network device determines the bearer offload confirmation information according to the bearer offload request information;

A receiving module, configured to receive the bearer offload confirmation information sent by the second network device, where the bearer offload confirmation information carries information about the target offload bearer and first configuration information, and the first configuration information is used to indicate establishment Radio resource control RRC configuration required for the first auxiliary backhaul link, the first auxiliary backhaul link being a link between the third network device and the second network device, the first auxiliary backhaul link The path is used to transmit service data on the target offload bearer;

The determination module is further configured to determine the target offload bearer in the bearer to be offloaded according to the information of the target offload bearer, and determine the auxiliary backhaul link according to the information of the target offload bearer and the first configuration information. configuration information;

The sending module is also configured to send the auxiliary backhaul link configuration information, so that the third network device establishes the first auxiliary backhaul link and the second auxiliary backhaul link according to the auxiliary backhaul link configuration information. , and establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the second auxiliary backhaul link is between the third network device and the first network device. links between;

The sending module is further configured to send the service data on the target offload bearer to the third network device through the second auxiliary backhaul link.

17. The network device according to claim 16, wherein the bearer offload confirmation information also carries the second bearer mapping rule of the first network device;

The network equipment also includes:

Update module, configured to update the bearer mapping relationship between the first interface and the fifth interface and the bearer mapping relationship between the fifth interface and the fourth interface according to the second bearer mapping rule, the fourth interface The interface is an interface between the first network device and the third network device, and the fifth interface is an interface between the first network device and the fifth network device.

18. The network device according to claim 16 or 17, characterized in that the network device further includes:

A measurement module, used to measure the load value on the main backhaul link. If the load value is large The first network device determines the bearer to be offloaded on the primary backhaul link.

19. The network device according to any one of claims 16 to 18, characterized in that the determination module is specifically used to:

20. A second network device, characterized by: including:

A receiving module, configured to receive the bearer offload request information sent by the first network device, where the bearer offload request message carries the information of the bearer to be offloaded and the first identity identification information of the third network device;

Determining module, configured to determine bearer offload confirmation information according to the bearer offload request information, where the bearer offload confirmation information carries target offload bearer information and first configuration information;

A sending module, configured to send the bearer offload confirmation information to the first network device; An establishing module, configured to establish a first auxiliary backhaul link with the third network device; The receiving module is also configured to pass the first The auxiliary backhaul link receives service data on the target offload bearer.

21. The network device according to claim 20, wherein the bearer offload request message also carries the first bearer mapping rule of the second network device;

The second network device also includes:

An update module, configured to determine the information of the target offload bearer according to the bearer offload request information, update the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and update the third interface. The bearer mapping relationship between the second interface and the third interface, the first interface is the interface between the second network device and the first network device, the second interface is the interface between the second network device and An interface between fourth network devices, the third interface is an interface between the second network device and the third network device.

22. A third network device, characterized by: including:

A receiving module, configured to receive the auxiliary backhaul link configuration information sent by the first network device; and an establishing module, configured to establish the first auxiliary backhaul link based on the auxiliary backhaul link configuration information. and a second auxiliary backhaul link, and establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the first auxiliary backhaul link is the link between the third network device and the second auxiliary backhaul link. The link between the second network devices, the second auxiliary backhaul link is the link between the third network device and the first network device;

The receiving module is also configured to receive service data on the target offload bearer through the second auxiliary backhaul link;

A sending module, configured to send the service data on the target offload bearer to the second network device through the first auxiliary backhaul link.

23. A first network device, characterized by: including:

A processor configured to determine the bearer to be offloaded on the main backhaul link, where the main backhaul link is the link between the first network device and the second network device;

A sender configured to send a bearer offload request message to the second network device, where the bearer offload request message carries the information of the bearer to be offloaded and the first identity identification information of the third network device, so that the third network device can The second network device determines the bearer offload confirmation information according to the bearer offload request information;

Receiver, configured to receive the bearer offload confirmation information sent by the second network device, where the bearer offload confirmation information carries target offload bearer information and first configuration information, where the first configuration information is used to indicate establishment Radio resource control RRC configuration required for the first auxiliary backhaul link, the first auxiliary backhaul link being a link between the third network device and the second network device, the first auxiliary backhaul link The path is used to transmit service data on the target offload bearer;

The processor is further configured to determine the target offload bearer in the bearer to be offloaded according to the information of the target offload bearer, and determine the auxiliary backhaul link according to the information of the target offload bearer and the first configuration information. configuration information;

The sender is also configured to send the auxiliary backhaul link configuration information, so that the third network device establishes the first auxiliary backhaul link and the second auxiliary backhaul link according to the auxiliary backhaul link configuration information. , and establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the second auxiliary backhaul link is between the third network device and the first network device. links between;

The transmitter is further configured to transmit to the third network device through the second auxiliary backhaul link. Send the service data on the target offload bearer.

24. The network device according to claim 23, wherein the bearer offload confirmation information also carries the second bearer mapping rule of the first network device;

The processor is also used to:

The bearer mapping relationship between the first interface and the fifth interface and the bearer mapping relationship between the fifth interface and the fourth interface are updated according to the second bearer mapping rule, and the fourth interface is the third interface. An interface between a network device and the third network device, and the fifth interface is an interface between the first network device and the fifth network device.

25. The network device according to claim 23 or 24, characterized in that the processor further includes:

Measure the load value on the main backhaul link. If the load value is greater than the set first threshold, the first network device determines the bearer to be offloaded on the main backhaul link.

26. The network device according to any one of claims 23-25, characterized in that the processor is specifically used for:

27. A second network device, characterized by: including:

A receiver configured to receive the bearer offload request information sent by the first network device, where the bearer offload request message carries the information of the bearer to be offloaded and the first identity identification information of the third network device;

A processor, configured to determine bearer offload confirmation information based on the bearer offload request information, where the bearer offload confirmation information carries target offload bearer information and first configuration information; a sender, configured to send the bearer offload confirmation information to the first network device Bearer offload confirmation information; The processor is further configured to establish a first auxiliary backhaul link with the third network device; The receiver is further configured to receive the target offload bearer through the first auxiliary backhaul link. business data.

28. The network device according to claim 27, wherein the bearer offload request message also carries the first bearer mapping rule of the second network device;

The processor is further configured to determine the target offload bearer according to the bearer offload request information. carrying information, and updating the bearer mapping relationship between the first interface and the second interface according to the first bearer mapping rule, and updating the bearer mapping relationship between the second interface and the third interface, the first The interface is an interface between the second network device and the first network device, the second interface is an interface between the second network device and the fourth network device, the third interface is the An interface between the second network device and the third network device.

29. A third network device, characterized by: including:

a receiver, configured to receive the auxiliary backhaul link configuration information sent by the first network device; a processor, configured to establish the first auxiliary backhaul link and the second auxiliary backhaul link according to the auxiliary backhaul link configuration information, and Establish a bearer mapping relationship between the first auxiliary backhaul link and the second auxiliary backhaul link, where the first auxiliary backhaul link is a link between the third network device and the second network device , the second auxiliary backhaul link is a link between the third network device and the first network device;

The receiver is further configured to receive service data on the target offload bearer through the second auxiliary backhaul link;

A transmitter, configured to send service data on the target offload bearer to the second network device through the first auxiliary backhaul link.