WO2015100590A1

WO2015100590A1 - Data transmission method and user equipment and enb

Info

Publication number: WO2015100590A1
Application number: PCT/CN2013/091050
Authority: WO
Inventors: 黄敏
Original assignee: 华为技术有限公司
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-09
Also published as: CN103875275A

Abstract

A data transmission method and user equipment (UE) and eNB, the data transmission method comprising: a UE receives secondary configuration information transmitted by a PeNB, the secondary configuration information comprising second DRB information allocated for the UE by an SeNB in an SCell, the SeNB managing the SCell, and the SCell being a secondary cell of the UE; the UE binds a first EPS-Bearer to a second DRB, the first EPS-Bearer being bound to a first DRB before being bound to the second DRB, the first DRB being a data radio bearer allocated for the UE by the PeNB in the PCell, the PeNB managing the PCell, and the PCell being a primary cell of the UE; the UE transmits data streams using the second DRB bound to the first EPS-Bearer.

Description

- Data transmission method and user equipment and base station

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a data transmission method, a user equipment, and a base station. Background technique

Carrier Aggregation (CA) technology is a user equipment (UE) that simultaneously sends and receives data from different cells (Cell). The hetero-site CA (Inter-eNB CA) refers to two Cell points used for CA. It belongs to different evolved base stations (evolved NodeBs, eNBs). Different-site CA technology can bring higher throughput to users, improve user experience, and improve network resource utilization. Based on the above advantages, hetero-site CA technology has become a hot topic in current research.

For the hetero-site CA technology, the traffic is usually split at the Internet Protocol (IP) layer, and the complete L1 and L2 protocol stacks are available in the primary eNB (PeNB) and the secondary eNB (SeNB). This means that each of the primary base station and the secondary base station needs to establish a respective Data Radio Bearer (DRB). For the hetero-site CA of the IP layer offload, the implementation of the current carrier aggregation scheme (for example, the 3rd Generation Partnership Project (3GPP)) explicitly specifies the evolved packet network bearer and the DRB is - corresponding The English translation of the evolved packet network bearer is Evolved Packet System-Bearer, and the cartridge is written as EPS-Bearer. In addition, EPS-Bearer can also be called as an evolved packet system bearer. For the EPS-Bearer established in the hetero-site CA implementation, if the data traffic on one of the EPS-Bearers is 4, the data flow with large traffic flows to the data traffic through the correspondence between the EPS-Bearer and the DRB. The EPS-Bearer corresponds to the base station to which the DRB points, so that the load of the base station pointed to by the DRB is heavy, causing congestion of the base station. Summary of the invention

The embodiments of the present invention provide a data transmission method and a user equipment, which are used to solve the problem of base station congestion caused by overweight load of a base station existing in the prior art.

In a first aspect, an embodiment of the present invention provides a data transmission method, including: The user equipment UE receives the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell, The SCell is a secondary cell of the UE;

The UE is bound to the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, The first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

The UE transmits a data stream using a second DRB bound to the first EPS-Bearer.

With reference to the first aspect, in a first possible implementation manner of the first aspect, before the UE binds the first EPS-Bearer and the second DRB, the method further includes:

Receiving, by the UE, primary configuration information sent by the PeNB, where the primary configuration information includes information of the first-DRB;

The UE binds the first EPS-Bearer to the first DRB.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the receiving, by the UE, the secondary configuration information that is sent by the PeNB, includes:

Receiving, by the UE, a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB ID of the second DRB and an identifier ID of the first EPS-Bearer, where the RRC reconfiguration The message also carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB;

Binding, by the UE, the first EPS-Bearer and the second DRB, specifically:

After obtaining the Full Config parameter in the RRC reconfiguration message, the UE establishes a mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB in the non-access NAS layer.

In combination with the first aspect or the first possible or the second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the UE is used to be bound to the first EPS-Bearer The second DRB transmits the data stream, including:

When the SeNB sends the first downlink data stream by using the second DRB, the UE receives the first downlink data stream sent by the SeNB by using the second DRB;

The method further includes:

When the UE receives the first downlink data stream sent by the SeNB by using the second DRB, If the PeNB sends the second downlink data stream by using the third DRB, the UE receives the second downlink data stream sent by the PeNB by using the third DRB, and the third DRB is bound to the second EPS-Bearer. The third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell, where the first downlink data stream and the second downlink data stream are a unified control node SRC to the slave service gateway SGW. The received data stream is obtained by offloading, or the first downlink data stream and the second downlink data stream are obtained by the PeNB to offload the data stream received from the SGW.

With reference to the first aspect or the first possible or the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the data stream is an uplink data stream that the UE needs to send And the using, by the UE, the second DRB to transmit the data stream that is bound to the first EPS-Bearer, including: determining, by the first EPS-Bearer, the second binding with the first EPS-Bearer DRB;

And sending, by the UE, the uplink data stream that needs to be sent to the SeNB by using the second DRB, and sending, by the SeNB, the uplink data stream that needs to be sent to the SRC or the SGW.

In combination with the first aspect or the first possible or the second possible or the third possible or the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the second The DRB is established by the SeNB for the UE in the SCell, and the information of the second DRB is acquired by the PeNB from the SeNB and carried in the secondary configuration information and sent to the UE.

In combination with the first aspect or the first possible or the second possible or the third possible or the fourth possible or the fifth possible possible implementation of the first aspect, in a sixth possible implementation of the first aspect The first EPS-Bearer is a default evolved packet network bearer Default EPS-Bearer, or the dedicated evolved packet network bearer Dedicated EPS-Bearer.

In combination with the first aspect or the first possible or the second possible or the third possible or the fourth possible or the fifth possible possible implementation of the first aspect, in a seventh possible implementation of the first aspect The first EPS-Bearer is an Assisting Evolved Packet Network bearer Assisting EPS-Bearer;

The Assisting EPS-Bearer is triggered by the mobility management entity MME, or triggered by the PGW in the core network, or triggered by the UE to establish the EPS-Bearer.

In a second aspect, an embodiment of the present invention provides a data transmission method, including:

The primary base station PeNB acquires information of the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;

The PeNB sends the secondary configuration information to the UE, where the secondary configuration information includes information about the second DRB;

The second DRB is configured to be bound to the first evolved packet network bearer EPS-Bearer, and used to transmit a data stream between the UE and the SeNB.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the primary base station PeNB acquires information about the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell. Includes:

The PeNB allocates a first DRB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

The PeNB sends the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;

The first DRB is configured to be bound to the first EPS-Bearer, and used to transmit a data stream between the UE and the PeNB.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the auxiliary configuration information is used to indicate that the UE cancels the first EPS-Bearer Binding with the first DRB, and binding the first EPS-Bearer and the second DRB.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the information about the second data radio bearer (DRB) allocated by the SeNB to the user equipment UE in the secondary cell SCell is obtained by the primary base station, and the information includes:

Receiving, by the PeNB, information about the second DRB sent by the SeNB;

Or, the PeNB receives the information of the second DRB that is sent by the unified control node SRC, and the information of the second DRB is sent by the SeNB to the SRC.

With reference to the second aspect or the first possible or the second possible or the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the information of the second DRB is a radio bearer identifier RB ID of the second DRB; the secondary configuration information is a radio resource control protocol RRC reconfiguration message;

The sending, by the PeNB, the secondary configuration information to the UE includes:

Sending, by the PeNB, the RRC reconfiguration message, where the RRC reconfiguration message carries a second The RB ID of the DRB and the identifier ID of the first EPS-Bearer, the RRC reconfiguration message further carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB .

With reference to the second aspect or the first possible or the second possible or the third possible or the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the PeNB is After the UE sends the secondary configuration information, the method further includes:

Receiving, by the PeNB, a data stream sent by the SGW;

The PeNB offloads the data stream into a first downlink data stream and a second downlink data stream; the PeNB sends the first downlink data stream to the UE by using the SeNB, where the SeNB Transmitting the bearer of the first downlink data stream with the UE as the second DRB; the PeNB sending the second downlink data stream to the UE by using a third DRB, where the third DRB is The data radio bearer allocated by the PeNB to the UE in the PCell.

In a third aspect, the embodiment of the present invention further provides a user equipment, including: a first unit, a second unit, and a third unit, where

The first unit is configured to receive the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell, the SCell is a secondary cell of the UE;

The second unit is configured to bind the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, The first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

The third unit is configured to transmit the data stream using the second DRB bound to the first EPS-Bearer. In a fourth aspect, the embodiment of the present invention further provides a base station, where the base station is a primary base station PeNB, and includes: a first unit and a second unit, where

The first unit is configured to acquire information about a second data radio bearer DRB allocated by the SeNB in the secondary cell SCell to the user equipment UE, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;

The second unit is configured to send the secondary configuration information to the UE, where the secondary configuration information includes information about the second DRB;

The second DRB is used by the UE to bind the first evolved packet network bearer. The EPS-Bearer and the second DRB are configured to transmit a data stream according to the second DRB and the SeNB.

In the embodiment of the present invention, the UE first receives the secondary configuration information sent by the PeNB, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and then the UE binds the first EPS-Bearer and the second DRB. The first EPS-Bearer is bound to the first DRB before being bound to the second DRB. After binding the first EPS-Bearer and the second DRB, the UE transmits data by using the second DRB bound to the first EPS-Bearer. flow. The first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to a different DRB, for example, the UE is receiving. The first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention. The first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed. Establishing a mapping relationship between the first EPS-Bearer and the second DRB, so that the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing UE and SeNB The data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit data streams, satisfy load balancing between different sites, and improve user throughput. Rate and resource utilization. DRAWINGS

1 is a schematic block diagram of a data transmission method according to an embodiment of the present invention; FIG. 2 is a schematic block diagram of another data transmission method according to an embodiment of the present invention; FIG. 4 is a schematic block diagram of another data transmission method according to an embodiment of the present invention; FIG. 5 is a schematic diagram of an application scenario in a data transmission method according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a component of a UE according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a PeNB according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of another PeNB according to an embodiment of the present disclosure; FIG. 7 is a schematic structural diagram of another PeNB according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram of another UE according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another PeNB according to an embodiment of the present disclosure. detailed description

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, 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. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of the present invention.

The terms "first", "second" and the like in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the terms so used are interchangeable, as appropriate, and are merely illustrative of the manner in which the description of the embodiments of the present invention. In addition, the terms "comprises" and "comprising", and any variants thereof, are intended to cover a non-exclusive inclusion, so that a process, method, system, product, or device that comprises a series of units is not necessarily limited to those elements, but may include not clear Other units listed or inherent to these processes, methods, products or equipment.

The details are described below separately.

An embodiment of the data transmission method of the present invention is applicable to carrier aggregation (CA) of a user equipment (UE), where the method may include: receiving, by the UE, a primary base station (Primary eNB, PeNB) The secondary configuration information, where the secondary configuration information includes information of a second data radio bearer (DRB) allocated by the secondary eNB (Secondary eNB, SeNB) for the UE in the secondary cell (SCell), and the SeNB manages The SCell is a secondary cell of the UE; the UE is bound to the first Evolved Packet System-Bearer (EPS-Bearer) and the second DRB, where the first EPS-Bearer is bound to the second DRB. Binding with the first DRB, the first DRB is a data radio bearer allocated by the PeNB for the UE in the primary cell (PCell), the PeNB manages the PCell, and the PCell is the primary cell of the UE; the UE is tied to the first EPS-Bearer The determined second DRB transmits the data stream. Referring to FIG. 1, another embodiment of the data transmission method of the present invention may include: 101. A UE receives secondary configuration information sent by a PeNB.

The secondary configuration information includes information about the second DRB allocated by the SeNB to the UE in the SCell. In the embodiment of the present invention, the UE is attached to the PCell of the PeNB, and a communication connection is established between the UE and the PeNB. When the SCell is added to the UE in the Radio Access Network (RAN) network, the SeNB is the UE in the SCell. In the embodiment of the present invention, in order to distinguish between the DRB allocated by the SeNB for the UE in the SCell and the DRB allocated by the other base station to the UE, the DRB allocated by the SeNB to the UE is referred to as a “second data radio bearer”. The information of the second data radio bearer may be acquired by the PeNB, and the PeNB sends the information of the second data radio bearer to the UE in the manner of the secondary configuration information. In the subsequent embodiments, for convenience of description, it may also be referred to as "second DRB". The SeNB allocates a radio bearer identity (RB ID) to the second DRB allocated to the UE in the SCell, and configures all the parameters of the LI and L2 protocol stacks of the second DRB. The prior art is not described here.

It should be noted that, in the embodiment of the present invention, the PeNB sends the secondary configuration information to the UE, which is used to indicate that the UE is bound to the EPS-Bearer and the DRB, and the PD is bound to the DRB by using the secondary configuration information that is sent by the PeNB. In the example, the PeNB indicates that the UE sets the EPS-Bearer and the second DRB as an example. If only one EPS-Bearer exists, the secondary configuration information sent by the PeNB to the UE may not carry the EPS-Bearer indicating whether the UE will use the second DRB. Binding, of course, the PeNB may also indicate which EPS-Bearer is bound by the UE to the second DRB by using the sent secondary configuration information. In addition, the PeNB may send the secondary configuration information to the UE in multiple manners, for example, may be sent by the PeNB through a Radio Resource Control (RRC) reconfiguration message sent by the UE, and carried in the RRC reconfiguration message. All configuration parameters of the second DRB and the RB ID. The RRC reconfiguration message may also carry an EPS-Bearer to be bound. Specifically, the EPS-Bearer identifier (Identity, ID) may be used.

102. The UE binds the first EPS-Bearer and the second DRB.

The first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and the first DRB is a data radio bearer allocated by the PeNB for the UE in the PCell, the PeNB manages the PCell, and the PCell is the primary cell of the UE. .

In the embodiment of the present invention, when the PeNB determines to add the SCell to the UE and acquires the second DRB allocated by the SeNB to the UE in the SCell, the PeNB sends the secondary configuration information to the UE, and the UE may obtain the The second DRB allocated by the SeNB to the UE in the SCell, and the first EPS-Bearer and the acquired second DRB are bound according to the indication of the PeNB, and the secondary configuration information sent by the PeNB further carries the EPS-Bearer ID. The EPS-Bearer and the second DRB corresponding to the EPS-Bearer ID need to be bound. In the embodiment of the present invention, the first EPS-Bearer that needs to be re-bound is taken as an example for description. In addition, in the embodiment of the present invention, the first EPS-Bearer is bound to the first DRB before the first EPS-Bearer is bound to the second DRB, according to the explicit provisions in the 3GPP: EPS-Bearer and DRB are corresponding. of. That is to say, in the embodiment of the present invention, the first EPS-Bearer performs "rebinding" in the step 102, or is called "secondary binding". In the embodiment of the present invention, the first EPS is changed. The mapping relationship between the Bearer and the first DRB, that is, the existing binding between the first EPS-Bearer and the first DRB is released, but the first EPS-Bearer and the second DRB are bound, that is, the UE establishes the first A mapping relationship between an EPS-Bearer and a second DRB. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE receives the auxiliary The first EPS-Bearer is bound to the first DRB before the configuration information, but the first EPS-Bearer is bound to the second DRB after receiving the secondary configuration information.

According to the prior art (for example, 3GPP), the EPS-Bearer and the DRB are correspondingly-corresponding, and there is a certain and unique binding relationship between the EPS-Bearer and the DRB, and the traffic flow with a large traffic volume flows to the DRB. When the base station is pointed to, the base station corresponding to the DRB with large data traffic is relatively congested. Therefore, the prior art cannot perform flexible traffic distribution management for each base station, and load balancing between different sites cannot be achieved, and the user throughput rate is low. In the embodiment of the present invention, the first EPS-Bearer has been associated with a certain DRB (for example, DRB1), before the PeNB sends the secondary configuration information to the UE (the secondary configuration information includes the information that the SeNB allocates the DRB2 to the UE in the SCell). Binding, as described in step 102, in the embodiment of the present invention, the UE may change the binding relationship between the first EPS-Bearer and the DRB1, that is, the UE releases the binding of the first EPS-Bearer and the DRB1, and the binding is performed. The first EPS-Bearer and the DRB2 are changed, so that the mapping relationship between the first EPS-Bearer and the DRB1 is changed, and the mapping relationship between the first EPS-Bearer and the DRB2 is re-established, and the data flow can follow the newly established mapping relationship. Forwarding data, thereby changing the base station transmission data stream corresponding to the original DRB1 to the data stream transmitted by the base station corresponding to the DRB2, thereby improving the flexibility of data stream offloading, satisfying load balancing between different stations, and improving user throughput. Rate and resource utilization.

It should be noted that, in some embodiments of the present invention, step 102 UE binds the first Before the EPS-Bearer and the second DRB, the following steps may also be included:

The UE receives the primary configuration information sent by the PeNB, where the primary configuration information includes the information of the first DRB;

The UE binds the first EPS-Bearer to the first DRB.

After receiving the primary configuration message sent by the PeNB, the UE extracts the information of the first DRB from the primary configuration message, and then the UE binds the first EPS-Bearer and the first DRB, thus implementing the first EPS- The initial binding of Bearer to the first DRB. It can be seen that if the PeNB allocates the first DRB to the UE in the PCell, and the UE establishes a binding relationship between the first EPS-Bearer and the first DRB, but by step 102, the UE may release the first EPS-Bearer and the first Binding of a DRB, and binding the first EPS-Bearer and the second DRB. The binding of the first EPS-Bearer and the second DRB is a re-established binding, because the UE establishes an initial binding between the first EPS-Bearer and the first DRB allocated to it in the PCell, and rebinds The binding between the first EPS-Bearer and the second DRB is established, and the remapping of the binding relationship can change the flow of data, improve the flexibility of data stream transmission, and satisfy load balancing between different sites. . It should be noted that, in the embodiment of the present invention, the UE binds the first EPS-Bearer and the second DRB in step 102, and if the first EPS-Bearer is bound to other DRBs before performing the step, the step 102 is Execution will inevitably cause the binding between the first EPS-Bearer and other DRBs to be released, because according to the current 3GPP regulations, EPS-Bearer and DRB are still - corresponding, different from the prior art, this In the embodiment of the invention, the first EPS-Bearer and the plurality of DRBs are still corresponding to each time period.

In order to distinguish a plurality of evolved packet network bearers in the embodiment of the present invention, a naming manner of "first EPS-Bearer" and "second EPS-Bearer" may be adopted to distinguish that two different evolved packet network bearers ( EPS-Bearer), in the embodiment of the present invention, for convenience of description, the first evolved packet network bearer may be referred to as a "first EPS-Bearer", and a "second evolved packet network bearer" may be referred to as "a second evolved packet network bearer" cartridge. The second EPS-Bearer". In addition, in the embodiment of the present invention, in order to explain that the first EPS-Bearer has established a mapping relationship with a certain DRB before being re-bound with the second DRB, it will be the first and the first before step 102. The DRB bound by the DRB is called a "first DRB" to distinguish it from the second DRB allocated by the SeNB to the UE in the SCell.

In some embodiments of the present invention, before the UE binds the first EPS-Bearer and the second DRB, if two EPS-Bearers have been established, for example, the default evolved packet network bearer (Default EPS-Bearer and Dedicated EPS-Bearer, the first EPS-Bearer can be Default EPS-Bearer, or Dedicated EPS-Bearer. If only one EPS-Bearer is created, an EPS-Bearer needs to be established. For example, only one EPS-Bearer is established in the UE, assuming that the EPS-Bearer established in the UE is the second EPS-Bearer, and the second EPS The Bearer is bound to the third DRB. The third DRB is the data radio bearer allocated by the PeNB to the UE in the PCell. The UE needs to re-establish an EPS-Bearer. The re-established EPS-Bearer is defined in the embodiment of the present invention. The first EPS-Bearer.

It should be noted that, in some embodiments of the present invention, the first EPS-Bearer may specifically be an Assisting EPS-Bearer.

Further, in some embodiments of the present invention, the Assisting EPS-Bearer can be established in the following three ways:

Assisting EPS-Bearer is triggered by the Mobility Management Entity (MME), or triggered by the PGW in the core network, or triggered by the UE.

It should be noted that, in some embodiments of the present invention, step 102 UE binds the first

Before the EPS-Bearer and the second DRB, the method may further include: triggering establishment of the first EPS-Bearer when there is service data to be transmitted. That is to say, the first EPS-Bearer can be triggered by the UE to establish an EPS-Bearer when there is service data transmission.

It should be noted that, in some embodiments of the present invention, the step 101, the UE receives the secondary configuration information sent by the PeNB, and specifically includes:

The UE receives the RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries the RB ID of the second DRB and the ID of the first EPS-Bearer, and the RRC reconfiguration message also carries the Full Config parameter, Full The Config parameter is used to indicate that the UE is bound to the first EPS-Bearer and the second DRB, and the specific PeNB may set the value of the Full Config parameter to true (True). After the UE receives the RRC reconfiguration message, the UE may pass the Full. The value of the Config parameter is True. It is known that the first EPS-Bearer and the second DRB need to be bound. In this case, the step 102, the UE binding the first EPS-Bearer and the second DRB, may include: after the UE obtains the Full Config parameter in the RRC reconfiguration message, the non-access stratum (NAS) A mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the layer.

If the value of Full Config is True, the UE needs to re-configure the parameters. When the value of Full Config is False, it means to modify some parameter configurations. By using the Full Config mechanism, the UE can re-bind the first EPS-Bearer and the second DRB to achieve the purpose of using the SeNB to share the data flow in the PeNB, thereby implementing dynamic adjustment of the data flow.

103. The UE transmits a data stream by using a second DRB that is bound to the first EPS-Bearer.

In the embodiment of the present invention, after the UE binds the first EPS-Bearer and the second DRB, the second DRB may be used to transmit the data stream, because the second DRB is a data radio bearer allocated by the SeNB for the UE in the SCell. Therefore, in the step 103, the UE uses the second DRB to transmit the data stream, which means that the SeNB can be used to transmit the data stream, so that the SeNB can share the data traffic in the PeNB, thereby implementing flexible management of data offloading.

It should be noted that, in some embodiments of the present invention, step 103 UE is used with the first

The second DRB transmission data stream bound by the EPS-Bearer includes:

When the SeNB sends the first downlink data stream by using the second DRB, the UE receives the first downlink data stream sent by the SeNB by using the second DRB.

And when the UE receives the first downlink data stream sent by the SeNB by using the second DRB, if the PeNB sends the second downlink data stream by using the third DRB, the UE receives the second downlink data stream sent by the PeNB by using the third DRB, and the third DRB. Binding with the second EPS-Bearer, the third DRB is a data radio bearer allocated by the PeNB for the UE in the PCell;

The first downlink data stream and the second downlink data stream are obtained by using a single RAN controller (SRC) to offload the data stream received from the Serving GateWay (SGW), or the first downlink data. The stream and the second downlink data stream are obtained by the PeNB offloading the data stream received from the SGW.

In the embodiment of the present invention, two EPS-Bearers are established in the UE, namely a first EPS-Bearer and a second EPS-Bearer, wherein the second EPS-Bearer is bound to the third DRB, and the first EPS-Bearer Bind to the second DRB. The first downlink data stream and the second downlink data stream may be obtained by the SRC to offload the data stream received from the SGW, that is, the SRC is used as a split point, and the SRC is configured to receive the data stream from the SGW, and offload the received data stream, and Sending, by the PeNB and the SeNB, the received data stream is separately distributed. Specifically, when the SGW sends the data stream, the SRC receives the data stream from the SGW and divides the traffic into the first downlink data stream and the second downlink data stream. And transmitting the first downlink data stream to the SeNB, and transmitting the second downlink data stream to the PeNB, so that the UE can receive the first downlink data stream from the SeNB through the second DRB, and receive the first downlink data stream from the PeNB by using the third DRB. Second Row data stream. In addition, the first downlink data stream and the second downlink data stream may be obtained by the PeNB to offload the data stream received from the SGW, that is, the PeNB is used as a split point, and when the SGW sends the data stream, the PeNB receives the data stream from the SGW and The first downlink data stream and the second downlink data stream are offloaded, and the first downlink data stream is sent to the SeNB, so the UE can receive the first downlink data stream from the SeNB through the second DRB, and pass the third DRB from the third DRB. The PeNB receives the second downlink data stream.

An example is as follows: After the UE binds the first EPS-Bearer and the second DRB, for the downlink data flow of the entire system, the SRC is taken as a split point as an example, if the split point (SRC) receives the data flow from the SGW. The splitting point may divide the data stream received from the SGW into the first downlink data stream and the second downlink data stream, and then the SRC distributes the first downlink data stream to the SeNB, and distributes the second downlink data stream to the PeNB. The second EPS-Bearer is bound to the third DRB, so the UE can receive the second downlink data stream by using the third DRB. Because the first EPS-Bearer is bound to the second DRB, the UE can receive the second DRB. To the first downstream data stream.

It should be noted that, in some embodiments of the present invention, the data flow described in step 103 is an uplink data flow that the UE needs to send, and the step 103 uses the second DRB that is bound to the first EPS-Bearer to transmit the data flow. Can include:

The UE determines the second DRB that is bound to the first EPS-Bearer by using the first EPS-Bearer; the UE sends the uplink data stream that needs to be sent to the SeNB through the second DRB, and the SeNB sends the uplink data stream that needs to be sent to the SRC or SGW.

In the embodiment of the present invention, when there is an uplink data stream that needs to be sent in the UE, the second DRB that is bound to the first EPS-Bearer may be sent to the SeNB. For the uplink data stream to be transmitted in the UE, the first EPS-Bearer is mapped to the second DRB, and the uplink data stream to be transmitted can be forwarded to the SeNB according to the newly established mapping relationship, and sent by the SeNB to the SRC or Specifically, if the SRC is used as the offloading point, the UE may send the uplink data stream to the SeNB through the second DRB, and the SeNB may send the uplink data stream to the SRC. The SeNB may also receive the uplink data stream sent by the UE through the second DRB. It can be directly sent to the SRC, which can be set according to the application scenario. It is only explained here. If the mapping relationship between the first EPS-Bearer and the first DRB is fixed according to the prior art, the uplink data stream to be transmitted can only follow the original mapping relationship (the first EPS-Bearer and the first DRB). The mapping relationship is forwarded to the PeNB, and is sent by the PeNB to the SRC or the SGW. If the traffic of the uplink data stream is large, the method of using the PeNB to send the uplink data stream may cause the network load of the PeNB to be relatively large. In the case can be re The first EPS-Bearer and the second DRB are bound to change the flow direction of the uplink data stream, and the uplink data stream can be forwarded by the SeNB, thereby improving the flexibility of data stream offloading, meeting load balancing between different sites, and improving User throughput and resource utilization.

It can be seen from the description of the foregoing embodiment that the UE first receives the secondary configuration information sent by the PeNB, where the secondary configuration information includes the second DRB allocated by the SeNB for the UE in the SCell, and then the UE binds the first EPS-Bearer and the second DRB. And the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses the second DRB transmission bound to the first EPS-Bearer. data flow. The first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to a different DRB, for example, the UE is receiving. The first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention. The first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed. Establishing a mapping relationship between the first EPS-Bearer and the second DRB, so that the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing UE and SeNB The data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit data streams, satisfy load balancing between different sites, and improve user throughput. Rate and resource utilization.

The above embodiment describes the data transmission method from the UE side. Next, the data transmission method is described in detail from the PeNB side. Referring to the method shown in FIG. 2, the method may include the following steps:

201. The PeNB acquires information about the second DRB allocated by the SeNB to the UE in the SCell.

The SeNB manages the SCell, and the SCell is a secondary cell of the UE.

In the embodiment of the present invention, the UE is attached to the PCell of the PeNB, and a communication connection is established between the UE and the PeNB. When the SCell is added to the UE in the RAN network, the SeNB allocates a second DRB to the UE in the SCell, and the SeNB is the UE. After the second DRB is allocated, the PeNB may acquire the second DRB.

It should be noted that, in some embodiments of the present invention, step 201, the PeNB acquires the SeNB. Before the information about the second DRB allocated to the UE in the SCell, the following steps may be further included:

The PeNB allocates a first DRB to the UE in the PCell, where the PeNB manages the PCell, and the PCell is the primary cell of the UE;

The PeNB sends the primary configuration information to the UE, where the primary configuration information includes: information of the first DRB, where the first DRB is used for binding with the first EPS-Bearer, and is used for transmitting data streams between the UE and the PeNB.

Specifically, after the UE obtains the information of the first DRB by using the primary configuration information, the UE binds the first EPS-Bearer and the first DRB, and the first DRB is a data radio bearer allocated by the PeNB to the UE in the PCell, so the UE may A data stream is transmitted between the first DRB and the PeNB.

In some embodiments of the present invention, the step 201PeNB acquires the information about the second DRB allocated by the SeNB to the UE in the SCell, and may include the following information: the PeNB receives the information of the second DRB sent by the SeNB; or, the PeNB receives the information sent by the SRC. Information of the second DRB, where the information of the second DRB is sent by the SeNB to the SRC.

That is, in the foregoing embodiment, if a direct communication connection is established between the PeNB and the SeNB, after the SeNB allocates the information of the second DRB to the UE, the SeNB sends the information to the PeNB through the communication connection between the SeNB and the PeNB. . If no direct communication connection is established between the PeNB and the SeNB, if the SRC is used as the split point, the SRC establishes a communication connection with the PeNB and the SeNB respectively, and after the SeNB allocates the information of the second DRB to the UE, the SeNB passes the SeNB. The communication connection with the SRC is sent to the SRC, and then sent by the SRC to the PeNB through the communication connection between the SRC and the PeNB.

202. The PeNB sends the secondary configuration information to the UE.

The secondary configuration information includes the information of the second DRB, and the second DRB is used for binding with the first EPS-Bearer, and is used for transmitting the data flow between the UE and the SeNB.

In the embodiment of the present invention, after the PeNB acquires the information of the second DRB from the SeNB, the PeNB generates the secondary configuration information according to the information of the second DRB, and carries the second DRB in the secondary configuration information, and sends the information to the UE.

It should be noted that, in the embodiment of the present invention, the PeNB sends the secondary configuration information to the UE, which is used to indicate that the UE is bound to the EPS-Bearer and the DRB, and the PD is bound to the DRB by using the secondary configuration information that is sent by the PeNB. The SeNB shares the data flow on the PeNB, and the PeNB acquires the second DRB allocated by the SeNB to the UE. If only one EPS-Bearer exists, the PeNB The secondary configuration information sent by the UE may not carry the indication that the UE binds the second DRB with which EPS-Bearer. The PeNB may also indicate, by using the sent secondary configuration information, which EPS-Bearer is bound to the second DRB. In addition, the PeNB may send the secondary configuration information to the UE in multiple manners, for example, may be sent by the PeNB by using an RRC reconfiguration message sent by the UE, and the RRC reconfiguration message carries all the configuration parameters and the RB ID of the second DRB. . The RRC reconfiguration message may also carry an EPS-Bearer that needs to be bound. Specifically, it may be represented by an EPS-Bearer ID.

Specifically, the secondary configuration information is used to instruct the UE to release the binding of the first EPS-Bearer and the first DRB, and bind the first EPS-Bearer and the second DRB, and the UE binds the first EPS according to the indication of the PeNB. - Bearer and the second DRB, as described in detail in the foregoing embodiment, the description of the data transmission method performed on the UE side.

It should be noted that, the information of the second DRB may be the RB ID of the second DRB, and the secondary configuration information is the RRC reconfiguration message, and the step 202, the PeNB sends the secondary configuration information to the UE, including:

The PeNB sends an RRC reconfiguration message, where the RRC reconfiguration message carries the RB ID of the second DRB and the ID of the first EPS-Bearer, and the RRC reconfiguration message also carries the Full Config parameter, where the Full Config parameter is used to indicate the UE binding. An EPS-Bearer and a second DRB.

After the UE receives the RRC reconfiguration message, the UE can know that the first EPS-Bearer and the second DRB need to be bound by using the value of the Full Config parameter to be True. In this case, after obtaining the Full Config parameter in the RRC reconfiguration message, the UE establishes a mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB in the NAS layer.

In some embodiments of the present invention, after the step 202PeNB sends the secondary configuration information to the UE, the method may further include:

The PeNB receives the data stream sent by the SGW;

The PeNB offloads the data stream into the first downlink data stream and the second downlink data stream;

The PeNB sends the first downlink data stream to the UE via the SeNB, where the bearer that transmits the first downlink data stream between the SeNB and the UE is the second DRB;

The PeNB sends a second downlink data stream to the UE through the third DRB, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.

In the embodiment of the present invention, two EPS-Bearers are established in the UE, which are a first EPS-Bearer and a second EPS-Bearer, respectively, where the second EPS-Bearer is bound to the third DRB, the first The EPS-Bearer is bound to the second DRB. The first downlink data stream and the second downlink data stream may be obtained by the PeNB to offload the data stream received from the SGW, that is, the PeNB is used as a split point, and when the SGW sends the data stream, the PeNB receives the data stream from the SGW and divides the data into The first downlink data stream and the second downlink data stream are sent to the SeNB, so the UE can receive the first downlink data stream from the SeNB through the second DRB, and receive the first downlink data stream from the PeNB through the third DRB. Go to the second downstream data stream.

According to the description of the foregoing embodiment, after the PeNB acquires the information of the second DRB, the PeNB sends the secondary configuration information to the UE, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and the UE is bound. a first EPS-Bearer and a second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses the first EPS - The second DRB transport stream bound by Bearer. The first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving. The first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE may receive the secondary configuration information after receiving the secondary configuration information in the embodiment of the present invention. The first EPS-Bearer is re-bound, so that the binding of the first EPS-Bearer and the first DRB can be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship can be established by changing the binding relationship. a mapping relationship between the first EPS-Bearer and the second DRB, so the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing UE and SeNB The data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit the data stream, meet the load balancing between different sites, and improve the user throughput. And resource utilization.

In order to describe the data transmission method in the embodiment of the present invention in detail, the following describes the offloading process of the downlink data stream as an example. Referring to the schematic diagram of the method for distributing the downlink data stream as shown in FIG. The two EPS-Bearers are respectively set up in the UE, which are the first EPS-Bearer and the second EPS-Bearer respectively, as shown in the left part of FIG. 3, which is a downlink data stream transmission before performing the traffic aggregation method of the carrier aggregation of the present invention. The first EPS-Bearer is initially bound to the first DRB, and the second EPS-Bearer is bound to the third DRB. The downlink data stream includes: a first downlink data stream and a second downlink data stream, where Do not send to the UE through the second EPS-Bearer and the first EPS-Bearer.

As shown in the right part of FIG. 3, a schematic diagram of downlink data flow transmission after performing the traffic aggregation method of the carrier aggregation method, wherein the first EPS-Bearer and the second DRB are re-bound, after the SCell is added, The DRB in the terminal still maintains - corresponding to the EPS-Bearer, but the correspondence changes, and the second DRB is the DRB allocated by the SeNB for the UE in the SCell, and the second EPS-Bearer and the third data radio bearer are bound. The downlink data stream includes a first downlink data stream and a second downlink data stream, and then the first downlink data stream is sent to the SeNB through the second DRB, and the second downlink data stream is sent to the PeNB through the third DRB, and then the first downlink data stream is respectively sent to the PeNB. The second downlink data stream and the first downlink data stream are sent to an interface between a modem and a terminal equipment (TE, Terminal Equipment), where the interface aggregates the first downlink data stream and the second downlink data stream, and then Output the downstream data stream.

The above embodiment describes the data transmission method of the present invention from the user equipment side. Next, the data transmission method provided by another embodiment of the present invention, as shown in FIG. 4, may include the following steps:

401. After the UE binds the first EPS-Bearer and the second DRB, the SRC establishes from the SRC to

SCell's data channel.

The second DRB is a DRB allocated by the SeNB to the UE in the SCell, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB.

It should be noted that the SRC establishes a data channel from the SRC to the SCell, where the SRC is a logical function entity, which can be deployed in the PeNB or deployed as a separate network element, which is not limited herein. In the embodiment of the present invention, the data channel established by the SRC may be a GPRS Tunneling Protocol User Plane (GTPU) tunnel or a Generic Route Encapsulation (GRE) tunnel, which is understandable. The SRC establishes a data channel from the SRC to the SCell, and may also be another transmission channel. As long as it can meet the PeNB, the SeNB, the SGW, and the Packet Data Network Gateway (PGW), the data stream can be transmitted.

402. The SRC links the data channel to the second DRB.

The SRC needs to link the data channel to the second DRB in order to enable the data stream that is distributed to the SeNB by the SRC to be transmitted. Specifically, the EPS-Bearer is used to describe the end-to-end bearer from the UE to the PGW. In the SRC to SeNB segment, the first EPS-Bearer is specifically Slbearer, so the data channel can be linked with the Slbearer to achieve the data channel and the first EPS-Bearer link.

It should be noted that, after the step 402SRC links the data channel with the second DRB, the steps 403 to 405 may be performed, and the steps 406 and 407 may be performed, and the specific execution process may be determined by a specific application scenario.

403. The SRC receives the downlink data stream sent by the SGW.

In the embodiment of the present invention, the SGW sends a downlink data stream to the SRC, so that the SRC can obtain the downlink data stream.

404. The SRC divides the received data stream into a first downlink data stream and a second downlink data stream.

In the embodiment of the present invention, after the SRC receives the data stream, the SRC is split into the first downlink data stream and the second downlink data stream. For example, the SRC may change according to the load information of the network, and the connection status of the UE. Changes such as changes are made to determine how to offload to adjust the distribution of data streams in PCell and SCell.

405. The SRC sends the first downlink data stream and the second downlink data stream to the SeNB and the PeNB, respectively. In the embodiment of the present invention, the SRC determines the data traffic of the first downlink data stream and the data traffic of the second downlink data stream according to the split ratio, and then sends the first downlink data stream to the SeNB by using the foregoing established data channel, and The second downlink data stream is sent to the PeNB, thereby realizing the re-adjustment of the distribution of the data stream in the PCell and the SCell.

In the embodiment of the present invention, the UE re-binds the first EPS-Bearer and the second DRB, and changes the binding relationship between the first EPS-Bearer and the DRB, and the SRC establishes a data channel from the SRC to the SCell, so the SRC The first downlink data stream sent to the SeNB can be sent to the UE through the second DRB. Therefore, in the embodiment of the present invention, the first EPS-Bearer and the second DRB may be re-bound, so that the data stream sent by the SRC can be flexibly split into the first downlink data stream and the second downlink data stream, and then sent to the SeNB and respectively. In the PeNB, the flexibility of data stream offloading can be improved, load balancing between different sites can be satisfied, and user throughput and resource utilization can be improved.

406. The SRC receives the first uplink data stream sent by the SeNB by using the foregoing data channel.

In the embodiment of the present invention, after the UE binds the first EPS-Bearer and the second DRB, the UE may send the first uplink data stream to be transmitted to the SeNB by using the second DRB, and after receiving the first uplink data stream, the SeNB receives the first uplink data stream. Forwarded to the SRC, the SRC receives the data through the data channel from the SRC to the SCell An upstream data stream.

407. The SRC sends the first uplink data stream to the SGW.

In the embodiment of the present invention, after receiving the first uplink data stream forwarded by the SeNB, the SRC sends the first uplink data stream to the SGW, thereby realizing that the uplink data stream is adjusted from being transmitted through the PCell to being transmitted through the SCell. Reduces the network load of PCell, but achieves flexible data offloading.

In the embodiment of the present invention, the UE re-binds the first EPS-Bearer and the second DRB, and changes the binding relationship of the first EPS-Bearer, so the SRC can receive the first uplink data stream sent by the UE from the SeNB. The transmission mode in which the first uplink data stream is sent to the SRC through the PeNB is changed. Therefore, in the embodiment of the present invention, by rebinding the first EPS-Bearer and the second DRB, the flexibility of data stream offloading can be improved, load balancing between different sites can be satisfied, and user throughput and resource utilization rate can be improved. To facilitate a better understanding and implementation of the above solutions of the embodiments of the present invention, the corresponding application scenarios are exemplified below for specific description.

In some embodiments of the present invention, the first evolved packet network bearer may specifically be Assisting

EPS-Bearer, next to illustrate the establishment process of Assisting EPS-Bearer:

(1) Establishing an Assisting EPS-Bearer when the UE attaches to the carrier aggregation primary cell PCell, and the Assisting EPS-Bearer is permanent, similar to the process of establishing a Default EPS-Bearer.

The bearer is divided into Default EPS-Bearer and Dedicated EPS-Bearer in the 3GPP standard.

Dedicated EPS-Bearer can only transmit specific data streams. Which data streams are determined by Traffic Flow Templete (TFT). The role of TFT is to map the determined data stream to the determined bearer. Default EPS-Bearer does not have a corresponding TFT, it can pass any data stream. If a data stream cannot find the corresponding Dedicated EPS-Bearer according to the TFT, it uses the Default EPS-Bearer to transmit. There is only one Default EPS-Bearer, which is established when the UE is attached, and the others are Dedicated EPS-Bearer.

In the embodiment of the present invention, the Assisting EPS-Bearer established when the UE is attached may be regarded as the second Default EPS-Bearer, or may be regarded as the Dedicated EPS-Bearer. If you look at the second Default EPS-Bearer, follow the existing process, you can trigger the establishment by the MME, just like The establishment of Default EPS-Bearer is the same. If Assisting EPS-Bearer is understood as Dedicated EPS-Bearer, it can be triggered by the terminal or by the core network (PCRF or PDNGW).

If Assisting EPS-Bearer is considered to be the second Default EPS-Bearer, then no TFT and related parameters need to be set for the Assisting EPS-Bearer. When a certain data stream cannot find the corresponding Dedicated EPS-Bearer, you can select one of the Assisting EPS-Bearer and Default EPS-Bearer for the data stream.

If Assisting EPS-bearer is regarded as Dedicated EPS-Bearer, since Assisting does not know which data streams are transmitted on it when establishing, so to avoid the influence on other DedicatedEPS-bearers, the relevant parameters in TFT can be set as follows:

Packet Filter Identifier = 5;

Packet Filter Direction = uplink only;

Remote port = 9 (the discard port).

With the above configuration, the Assisting EPS-Bearer becomes a dummy bearer, that is, no data is allocated to the bearer on the PDNGW or UE side.

(2) Establish Assisting EPS-Bearer when there is service data transmission.

For a service data transmission without Dedicated EPS-Bearer, trigger a Dedicated EPS-Bearer and treat the Dedicated EPS-Bearer as Assisting EPS-Bearer; if there is new service data stream and Dedicated EPS-Bearer already exists At the same time, the data stream can be merged into the existing Dedicated EPS-Bearer according to Quality of Service (QoS), and the TFT is updated. According to the bearer establishment mode, the data stream will be mainly transmitted in the Assisting EPS-Bearer.

FIG. 5 is a schematic diagram of an application scenario in a data transmission method according to an embodiment of the present invention.

In FIG. 5, when two or more EPS-Bearers are established in the UE, in order to enable the hetero-site CA in the IP layer, if the UE originally has only one EPS-Bearer, it may be described in the foregoing embodiment. The method is to establish an Assisting EPS-Bearer. If the UE originally has two or more EPS-Bearers, the Assisting EPS-Bearer may not be established. If the SCell is added at this time, since there is a complete protocol stack in the SeNB, this is This means that at least one DRB is established in the SCell. According to the correspondence between the EPS-Bearer and the DRB, these DRBs need to have an EPS-Bearer corresponding to them. For example, in Figure 5, a total of two EPS-Bearers are established in the UE, namely Default EPS-Bearer and Assisting EPS-Bearer. EPS-Bearer is an end-to-end bearer from the UE to the PGW. In implementation, the EPS-Bearer can be implemented by DRB, SI Bearer (E-RAB), and S5/S8 Bearer. Specifically, the Default EPS-Bearer is implemented by the DRB3, E-RAB3, and S5/S8 Bearer segments, and the Assisting EPS-Bearer is implemented by the DRB1, E-RAB 1, and S5/S8 Bearer segments. The Assisting EPS-Bearer refers to the foregoing. The first EPS-Bearer, Default EPS-Bearer in the embodiment refers to the second EPS-Bearer in the foregoing embodiment. Before the SCell is added, the Assisting EPS-Bearer and the DRB1 are bound. After the SCell is added, the PeNB sends the secondary configuration information to the UE, including the information of the DRB2, where the DRB is the DRB added by the SeNB to the UE in the SCell, and then the UE Bind DRB2 and Assisting EPS-Bearer to re-establish the mapping between Assisting EPS-Bearer and DRB2.

The data transmission method provided by the embodiment of the present invention is described in the following application scenario. The data transmission method may include the following steps:

S501. Before the SCell is added, the data streams transmitted on the two EPS-Bearers are transmitted through the PeNB, the Assisting EPS-Bearer is bound to the DRB1, and the Default EPS-Bearer is bound to the DRB3. The DRB1 refers to the foregoing embodiment. The first DRB, DRB3 refers to the third DRB in the foregoing embodiment. The service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle. That is, the data stream is transmitted in the DRB3, and the DRB1 is idle.

S502. When the SCell is added, the UE receives the DRB2 (the DRB2 is the newly established DRB) allocated by the SeNB for the UE in the SCell, and then the UE binds the DRB2 and the Assisting EPS-Bearer. The specific approach can be:

(1) The SeNB allocates the RB ID of the DRB2 to the UE in the SCell, and configures all parameters of the L1 and L2 protocol stacks of the DRB2, and delivers the configuration parameters to the PeNB.

(2) The PeNB carries the DRB2 in the RRC reconfiguration message to the UE. The RRC reconfiguration message carries all the parameters of the DRB2, the RB ID, and the EPS-Bearer ID of the Assisting EPS-Bearer, and sets the Full Config parameter to Tme. After receiving the RRC reconfiguration message, the UE will bind the RB ID (DRB2) and the EPS-Bearer ID (Assisting EPS-Bearer) if the value of the Full Config parameter in the RRC reconfiguration message is True. In fact, the original DRB (DRBl) corresponding to the EPS-Bearer ID is replaced with DRB2. In the UE, the EPS-bearer and the DRB still satisfy the mapping relationship, which is better compatible with the EPS-bearer in the prior art. DRB Between - the design of the mapping.

It should be noted that, in the embodiment of the present invention, adding and suppressing the DRB in the RRC Connection Reconfiguration message may be as follows:

Configure the parameters of pdcp-Config, rlc-Config, logicalChannelldentity, logicalChannelConfig, etc. in the following parameter configuration, drb-Identity is the DRB ID assigned by SCell (ie DRB2), eps-Bearerldentity is filled in the ID of Assisting EPS-Bearer, then After the fullConfig-r9 in the RRC ConnectionReconfiguration message is set to True, the RRC layer of the UE receives the fullConfig-r9 ==Tme, and then notifies the NAS layer of the UE to re-bind the eps-Bearerldentity and the drb-Identity in the DRB-ToAddMod. , complete the mapping relationship between DRB and EPS-Bearer. In some embodiments of the present invention, the code segment used by the UE to bind the first EPS-Bearer and the second DRB may be as follows:

DRB-ToAddMod:: = SEQUENCE {

eps-Bearerldentity INTEGER (0..15) OPTIONAL, -Cond

DRB-Setup

drb-Identity DRB-Identity,

pdcp-Config PDCP-Config OPTIONAL, Cond PDCP rlc-Config RLC-Config OPTIONAL, -- Cond Setup logicalChannelldentity INTEGER (3..10) OPTIONAL -Cond DRB-Setup

logicalChannelConfig LogicalChannelConfig OPTIONAL, — Cond Setup

RRCConnectionReconfiguration-v920-IEs:: = SEQUENCE {

otherConfig-r9 OtherConfig-r9 OPTIONAL, - Need ON

fullConfig-r9 ENUMERATED {true} OPTIONAL, - Cond

HO-Reestab

nonCriticalExtension RCConnectionReconfiguration-v 1020-IE PTIONAL It should be noted that the code segment as described above is only an example, and it needs to be combined in practical applications. The values of the configuration parameters are flexibly set in the protocol versions of the 3GPP and the actual application scenarios, and are not described here.

S503. The SRC establishes a data channel from the SRC to the SCell and links the data channel with the second DRB. In this way, the data stream transmitted in the Assisting EPS-Bearer can be sent to the UE through the SCell.

The data channel between the established SRC and the SCell may be a GTPU tunnel, a GRE tunnel, or other data channel. To maintain consistency with the 3GPP solution, the data channel may be a GTPU tunnel.

It should be noted that before the SCell is added, the service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle, that is, the data stream is transmitted in the DRB3, and the DRB1 is idle. It can be understood that before the SCell is added, the service data stream can also be transmitted on the Assisting EPS-Bearer. The Default EPS-Bearer is idle, that is, the data stream is transmitted in the DRB1, and the DRB3 is idle.

Another application scenario of the method for distributing the carrier aggregation provided by the embodiment of the present invention is as follows:

(1) It is assumed that the UE has two EPS-Bearers, which are respectively the default evolved packet network bearers.

The default EPS-Bearer and the assisted evolved packet network bear the Assisting EPS-Bearer, where the Assisting EPS-Bearer refers to the third EPS-Bearer in the foregoing embodiment, and the Default EPS-Bearer refers to the first in the foregoing embodiment. EPS-Bearer. Before the SCell is added, the data streams transmitted on the two EPS-Bearers are transmitted through the PeNB, the Assisting EPS-Bearer and the DRB2 are bound, and the Default EPS-Bearer is bound to the DRB1. The DRB2 refers to the foregoing in the foregoing embodiment. The second DRB, DRB1 refers to the first DRB in the foregoing embodiment. The service data stream is transmitted on the Default EPS-Bearer, and the Assisting EPS-Bearer is idle. That is, the data stream is transmitted in the DRB 1, and the DRB2 is idle.

(2) The PeNB re-allocates all L1/L2 parameters of the original DRB1 and all L1/L2 parameters of the DRB2 in the RRC reconfiguration message sent to the UE; meanwhile, sets the EPS-bearer ID in the DRB1 to the Assisting EPS. -Bearer ID, set the EPS-bearer ID in DRB 2 to Default EPS-Bearer ID, and set the Full-config parameter to Tme. The result of this is that DRB1 is bound to Assisting EPS-Bearer and DRB2 is bound to Default EPS-Bearer.

Through the above configuration, the binding of the Assisting EPS-Bearer to the second RB is implemented. The DRB1 and the DRB2 actually correspond to the PCell and the SCell, and the data flow corresponds to the Default EPS-Bearer. In the Assisting EPS-Bearer, the binding relationship between the EPS-Bearer and the DRB can be exchanged between the PCell or the SCell. In particular, it is considered that if the upstream data stream only sends data streams from one path, the switching of the upstream data stream in the PCell or SCell can be realized by such switching.

It should be noted that, for the foregoing method embodiments, they are all described as a series of action combinations for the description of the device, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other orders or concurrently in accordance with the present invention. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In order to facilitate the better implementation of the above described embodiments of the embodiments of the present invention, related apparatus for implementing the above schemes are also provided below.

Referring to FIG. 6, a UE 600 according to an embodiment of the present invention may include: a first unit 601, a second unit 602, and a third unit 603, where

The first unit 601 is configured to receive the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB management office An SCell, where the SCell is a secondary cell of the UE;

The second unit 602 is configured to bind the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB. The first DRB is a data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

The third unit 603 is configured to transmit the data stream using the second DRB bound to the first EPS-Bearer.

In some embodiments of the present invention, the first unit 601 is further configured to: receive primary configuration information sent by the PeNB, where the primary configuration information includes information of the first DRB;

The second unit 602 is further configured to: bind the first EPS-Bearer and the first DRB. In some embodiments of the present invention, the first unit 601 is specifically configured to: receive a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB of the second DRB. An ID and an identifier of the first EPS-Bearer, the RRC reconfiguration message further carrying a full configuration Full Config parameter, where the Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB;

The second unit 602 is specifically configured to: when the RRC reconfiguration message is obtained, Full Config After the parameter, the mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the non-access NAS layer.

In some embodiments of the present invention, when the SeNB sends the first downlink data stream by using the second DRB, the third unit 603 is specifically configured to: receive, by using the second DRB, the SeNB, First downlink data stream;

The third unit 603 is further configured to: when the UE receives the first downlink data stream sent by the SeNB by using the second DRB, if the PeNB sends the second downlink data stream by using the third DRB, Receiving, by the third DRB, the second downlink data stream that is sent by the PeNB, where the third DRB is bound to the second EPS-Bearer, and the third DRB is that the PeNB is the UE in the PCell. Allocated data radio bearer;

The first downlink data stream and the second downlink data stream are obtained by the unified control node SRC offloading the data stream received from the serving gateway SGW, or the first downlink data stream and the first The two downlink data flows are obtained by the PeNB offloading the data stream received from the SGW.

In some embodiments of the present invention, the data stream is an uplink data stream that the UE needs to send, and the third unit 603 is specifically configured to: determine, by the first EPS-Bearer, the first EPS- The second DRB to which the bearer is bound is sent to the SeNB by the second DRB, and the uplink data stream that needs to be sent is sent by the SeNB to the SRC or the SGW.

In some embodiments of the present invention, the second DRB received by the first unit 601 is established by the SeNB in the SCell for the UE, and the information of the second DRB is used by the PeNB. Obtained from the SeNB and carried in the secondary configuration information and sent to the UE.

In some embodiments of the present invention, the first EPS-Bearer used by the second unit 602 is a default evolved packet network bearer Default EPS-Bearer, or a dedicated evolved packet network bearer Dedicated EPS-Bearer.

In some embodiments of the present invention, the first EPS-Bearer used by the second unit 602 is an assisted evolved packet network bearer Assisting EPS-Bearer;

As shown in the embodiment shown in FIG. 6, first, the first unit receives the secondary configuration sent by the PeNB. Information, the secondary configuration information includes a second DRB allocated by the SeNB for the UE in the secondary cell, and then the second unit is bound to the first EPS-Bearer and the second DRB, and the first EPS-Bearer is bound to the second DRB. Before being bound to the first DRB, after binding the first EPS-Bearer and the second DRB, the third unit transmits the data stream using the second DRB bound to the first EPS-Bearer. The first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving. The first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention. The first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed. Establishing a mapping relationship between the first EPS-Bearer and the second DRB, so that the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing The data stream is transmitted between the UE and the SeNB, because the UE can The first binding EPS-Bearer different DRB at different time periods, it is possible to use DRB to which the transport stream flexible options to meet different load balancing across the site, user throughput and improve resource utilization.

Referring to FIG. 7-a, a PeNB 700 according to an embodiment of the present invention may include: a first unit 701 and a second unit 702, where

The first unit 701 is configured to acquire information about a second data radio bearer DRB allocated by the SeNB in the secondary cell SCell for the user equipment UE, where the SeNB manages the SCell, and the SCell is a secondary cell of the UE;

The second unit 702 is configured to send secondary configuration information to the UE, where the secondary configuration information includes information of the second DRB.

The second DRB is used by the UE to bind the first evolved packet network bearer EPS-Bearer and the second DRB to transmit a data stream according to the second DRB and the SeNB.

In some embodiments of the present invention, as shown in FIG. 7-b, the PeNB 700 further includes: a third unit 703, where The third unit 703 is configured to: after the acquiring, the information about the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, the first unit is allocated to the UE in the primary cell PCell. a DRB, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

The second unit 702 is further configured to: send the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;

The first DRB is used by the UE to bind the first EPS-Bearer and the first DRB before binding the first EPS-Bearer and the second DRB.

In some embodiments of the present invention, the secondary configuration information sent by the second unit 702 is used to instruct the UE to release the binding of the first EPS-Bearer and the first DRB, and bind the binding The first EPS-Bearer and the second DRB are described.

In some embodiments of the present invention, the first unit 701 is specifically configured to: receive information about the second DRB sent by the SeNB; or receive information about the second DRB sent by the unified control node SRC, The information of the second DRB is sent by the SeNB to the SRC.

In some embodiments of the present invention, the information of the second DRB is a radio bearer identifier RB ID of the second DRB; the secondary configuration information is a radio resource control protocol RRC reconfiguration message; Specifically, the RRC reconfiguration message is sent, where the RRC reconfiguration message carries the RB ID of the second DRB and the identifier of the first EPS-Bearer, and the RRC reconfiguration message also carries the fully configured Full Config parameter. The Full Config parameter is used to instruct the UE to bind the first EPS-Bearer and the second DRB.

In some embodiments of the present invention, as shown in FIG. 7-c, with respect to FIG. 7-a, the PeNB 700 further includes: a fourth unit 704 and a fifth unit 705, where

The fourth unit 704 is configured to: after the second unit sends the secondary configuration information to the UE, receive the data stream sent by the SGW;

The fifth unit 705 is configured to: offload the data stream into a first downlink data stream and a second downlink data stream;

The second unit 702 is further configured to send the first downlink data stream to the UE by using the SeNB, where the SeNB and the UE transmit the first downlink data stream. Carrying the second DRB;

The second unit 702 is further configured to: send the second downlink to the UE by using a third DRB a data stream, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.

As can be seen from the description of the foregoing embodiment, the first unit acquires the information of the second DRB, and the second unit sends the secondary configuration information to the UE, where the secondary configuration information includes the second DRB allocated by the SeNB to the UE in the secondary cell, and the UE Binding the first EPS-Bearer and the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and after binding the first EPS-Bearer and the second DRB, the UE uses and An EPS-Bearer-bound second DRB transport stream. The first EPS-Bearer is bound to the second DRB, and the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, because the second DRB is the data radio bearer allocated by the SeNB to the UE in the SCell. Therefore, in the embodiment of the present invention, the first EPS-Bearer still establishes a corresponding relationship with the DRB, but corresponding to different time segments, the first EPS-Bearer may be bound to different DRBs, for example, the UE is receiving. The first EPS-Bearer is bound to the first DRB before the secondary configuration information, but after the secondary configuration information is received, the first EPS-Bearer is bound to the second DRB, and the UE is visible after receiving the secondary configuration information in the embodiment of the present invention. The first EPS-Bearer may be re-bound, so that the binding of the first EPS-Bearer and the first DRB may be changed to the binding of the first EPS-Bearer and the second DRB, and the binding relationship may be changed. Establishing a mapping relationship between the first EPS-Bearer and the second DRB, so that the UE can use the second DRB bound to the first EPS-Bearer to transmit the data stream, and the UE can use the second DRB to transmit the data stream, thereby implementing UE and SeNB The data stream is transmitted. Since the UE can bind the first EPS-Bearer and different DRBs in different time periods, it can flexibly select which DRB to use to transmit the data stream, meet the load balancing between different sites, and improve user throughput. Rate and resource utilization.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores a program, and the program execution includes some or all of the arrangements described in the foregoing method embodiments.

Next, another UE provided by the embodiment of the present invention is introduced. Referring to FIG. 8, the user equipment 800 includes:

The input device 801, the output device 802, the processor 803, and the memory 804 (wherein the number of processors 803 in the user device 800 may be one or more, and one processor in Fig. 8 is taken as an example). In some embodiments of the present invention, the input device 801, the output device 802, the processor 803, and the memory 804 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The memory 804 is used to store instructions and data. The processor 803 is configured to perform the following steps:

Receiving, by the input device, the secondary configuration information sent by the primary base station PeNB, where the secondary configuration information includes information about a second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell, where the SeNB manages the SCell, the SCell is a secondary cell of the UE;

Binding the first evolved packet network bearer EPS-Bearer and the second DRB, where the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, the first DRB For the data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is a primary cell of the UE;

A data stream is transmitted by the output device using a second DRB bound to the first EPS-Bearer.

In some embodiments of the present invention, the processor 803 is further configured to: perform, after binding the first EPS-Bearer and the second DRB, receive, by using the input device, a primary configuration sent by the PeNB Information, the primary configuration information includes information of the first DRB, and the first EPS-Bearer is bound to the first DRB.

In some embodiments of the present invention, the processor 803 is specifically configured to: receive, by using the input device, a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries a radio bearer identifier RB ID of the second DRB and an identifier ID of the first EPS-Bearer, where the RRC reconfiguration message further carries a fully configured Full Config parameter, where the Full Config parameter is used to indicate that the UE is bound to the first EPS- Bearer and second DRB;

After obtaining the Full Config parameter in the RRC reconfiguration message, the mapping relationship between the ID of the first EPS-Bearer and the RB ID of the second DRB is established in the non-access NAS layer.

In some embodiments of the present invention, the processor 803 is specifically configured to: when the SeNB sends the first downlink data stream by using the second DRB, using the input device to pass the Receiving, by the second DRB, the first downlink data stream sent by the SeNB;

And when the UE receives the first downlink data stream sent by the SeNB by using the second DRB, if the PeNB sends the second downlink data stream by using the third DRB, using the input device to pass the third DRB. And receiving, by the PeNB, a second downlink data stream, where the third DRB is bound to a second EPS-Bearer, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell; The first downlink data stream and the second downlink data stream are obtained by the unified control node SRC offloading the data stream received from the serving gateway SGW, or the first downlink data stream and the first The two downlink data flows are obtained by the PeNB offloading the data stream received from the SGW.

In some embodiments of the present invention, the processor 803 is specifically configured to: perform, by using the first EPS-Bearer, a second DRB that is bound to the first EPS-Bearer; The device sends the uplink data stream that needs to be sent to the SeNB by using the second DRB, and the SeNB sends the uplink data stream that needs to be sent to the SRC or the SGW.

In some embodiments of the present invention, the second DRB stored by the memory 804 is established by the SeNB for the UE in the SCell, and information of the second DRB is used by the PeNB from the The SeNB acquires and carries the information in the secondary configuration information and sends the information to the UE.

In some embodiments of the present invention, the first EPS-Bearer stored in the memory 804 is a default evolved packet network bearer Default EPS-Bearer, or a dedicated evolved packet network bearer Dedicated EPS-Bearer.

In some embodiments of the present invention, the first EPS-Bearer stored by the memory 804 is an assisted evolved packet network bearer Assisting EPS-Bearer;

Next, another PeNB provided by the embodiment of the present invention is introduced. Referring to FIG. 9, the PeNB 900 includes:

The input device 901, the output device 902, the processor 903, and the memory 904 (wherein the number of processors 903 in the PeNB 900 may be one or more, and one processor in FIG. 9 is taken as an example). In some embodiments of the present invention, the input device 901, the output device 902, the processor 903, and the memory 904 may be connected by a bus or other means, wherein the bus connection is taken as an example in FIG.

The memory 904 is configured to store instructions and data.

The processor 903 is configured to perform the following steps:

Obtaining, by the input device, the information of the second data radio bearer DRB allocated by the SeNB in the secondary cell SCell for the user equipment UE, where the SeNB manages the SCell, where the SCell is a secondary cell of the UE;

Sending secondary configuration information to the UE by using the output device, where the secondary configuration information includes the Information of the second DRB;

In some embodiments of the present invention, the processor 903 is further configured to: obtain the second data radio bearer DRB allocated by the secondary base station SeNB for the user equipment UE in the secondary cell SCell, in the primary cell PCell Allocating a first DRB to the UE, the PeNB managing the PCell, where the PCell is a primary cell of the UE;

And sending, by the output device, the primary configuration information to the UE, where the primary configuration information includes: information about the first DRB;

In some embodiments of the present invention, the processor 903 is specifically configured to: receive, by the input device, information about the second DRB sent by the SeNB; or receive a unified by using the input device. And controlling information about the second data radio bearer sent by the node SRC, where the second data radio bearer is sent by the SeNB to the SRC.

In some embodiments of the present invention, the information of the second DRB that is stored by the memory 904 is a radio bearer identifier RB ID of the second DRB, and the secondary configuration information is a radio resource control protocol RRC reconfiguration message.

The processor 903 is specifically configured to perform the following steps:

The RRC reconfiguration message is sent by the output device, where the RRC reconfiguration message carries the RB ID of the second DRB and the identifier of the first EPS-Bearer, and the RRC reconfiguration message also carries the fully configured Full Config parameter. The Full Config parameter is used to indicate that the UE binds the first EPS-Bearer and the second DRB.

In some embodiments of the present invention, the processor 903 is further configured to: after transmitting the secondary configuration information to the UE, the PeNB receives the data stream sent by the SGW;

Diverting the data stream into a first downlink data stream and a second downlink data stream;

Transmitting, by the output device, the first downlink data stream to the UE by using the SeNB, where the bearer of the first downlink data stream is transmitted between the SeNB and the UE is the Two DRB; And transmitting, by the output device, the second downlink data stream to the UE by using a third DRB, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the above mentioned storage medium can be It is a read-only memory, a disk or a disc.

The data transmission method, the user equipment, and the base station provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, the specific implementation manner and the application range may be changed. Therefore, the content of the present specification should not be construed as limiting the invention.

Claims

Rights request

1. A data transmission method, characterized by including:

The user equipment UE receives the secondary configuration information sent by the primary base station PeNB. The secondary configuration information includes the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell. The SeNB manages the SCell, The SCell is the secondary cell of the UE;

The UE binds a first evolved packet network bearer EPS-Bearer and the second DRB, wherein the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, and the The first DRB is the data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is the primary cell of the UE;

The UE uses the second DRB bound to the first EPS-Bearer to transmit the data stream.

2. The method according to claim 1, characterized in that before the UE binds the first EPS-Bearer and the second DRB, it further includes:

The UE receives the main configuration information sent by the PeNB, and the main configuration information includes the information of the -th DRB;

The UE binds the first EPS-Bearer and the first DRB.

3. The method according to claim 1 or 2, characterized in that the UE receives the secondary configuration information sent by the PeNB, including:

The UE receives the radio resource control protocol RRC reconfiguration message sent by the PeNB. The RRC reconfiguration message carries the radio bearer identification RB ID of the second DRB and the identification ID of the first EPS-Bearer. The RRC reconfiguration message The message also carries Full Config parameters, which are used to instruct the UE to bind the first EPS-Bearer and the second DRB;

The UE binds the first EPS-Bearer and the second DRB, specifically:

4. The method according to any one of claims 1 to 3, characterized in that the UE uses the second DRB bound to the first EPS-Bearer to transmit the data stream, including:

When the SeNB sends the first downlink data stream through the second DRB, the UE receives the first downlink data stream sent by the SeNB through the second DRB;

The method also includes: When the UE receives the first downlink data stream sent by the SeNB through the second DRB, if the PeNB sends the second downlink data stream through the third DRB, the UE receives the first downlink data stream through the third DRB. The second downlink data stream sent by the PeNB, the third DRB is bound to the second EPS-Bearer, and the third DRB is the data radio bearer allocated by the PeNB to the UE in the PCell; wherein, the The first downlink data flow and the second downlink data flow are obtained by the unified control node SRC dividing the data flow received from the serving gateway SGW, or the first downlink data flow and the second downlink data flow Obtained by offloading the data flow received from the SGW for the PeNB.

5. The method according to any one of claims 1 to 3, characterized in that: the data stream is an uplink data stream that the UE needs to send, and the UE uses a binding method with the first EPS-Bearer. The second DRB transport data stream includes:

The UE determines the second DRB bound to the first EPS-Bearer through the first EPS-Bearer;

The UE sends the uplink data stream that needs to be sent to the SeNB through the second DRB, and the SeNB sends the uplink data stream that needs to be sent to the SRC or SGW.

6. The method according to any one of claims 1 to 5, characterized in that the second DRB is established by the SeNB for the UE in the SCell, and the information of the second DRB is The PeNB obtains it from the SeNB and carries it in the auxiliary configuration information and sends it to the UE.

7. The method according to any one of claims 1 to 6, characterized in that the first EPS-Bearer is a Default EPS-Bearer carried by a default evolved packet network, or a Dedicated EPS-Bearer carried by a dedicated evolved packet network. Bearer.

8. The method according to any one of claims 1 to 6, characterized in that the first EPS-Bearer is an assisting evolved packet network bearer Assisting EPS-Bearer;

The Assisting EPS-Bearer is an EPS-Bearer that is triggered to be established by the mobility management entity MME, or is triggered by the PGW in the core network, or is triggered by the UE.

9. A data transmission method, characterized by including:

The primary base station PeNB obtains the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the user equipment UE in the secondary cell SCell. The SeNB manages the SCell, and the SCell is the secondary cell of the UE;

The PeNB sends secondary configuration information to the UE, where the secondary configuration information includes the second DRB information;

Wherein, the second DRB is used to be bound to the first evolved packet network bearer EPS-Bearer, and is used to transmit data flows between the UE and the SeNB.

10. The method according to claim 9, characterized in that, before the primary base station PeNB obtains the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the user equipment UE in the secondary cell SCell, it also includes:

The PeNB allocates the first DRB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is the primary cell of the UE;

The PeNB sends the main configuration information to the UE, and the main configuration information includes: the information of the first DRB;

Wherein, the first DRB is used to be bound to the first EPS-Bearer and used to transmit data streams between the UE and the PeNB.

11. The method according to claim 10, wherein the auxiliary configuration information is used to instruct the UE to unbind the first EPS-Bearer and the first DRB, and bind the first DRB. An EPS-Bearer with the second DRB.

12. The method according to any one of claims 9 to 11, characterized in that, the primary base station PeNB obtains the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the user equipment UE in the secondary cell SCell, include:

The PeNB receives the information of the second DRB sent by the SeNB;

Or, the PeNB receives the information of the second DRB sent by the unified control node SRC, and the information of the second DRB is sent by the SeNB to the SRC.

13. The method according to any one of claims 9 to 12, characterized in that: the information of the second DRB is the radio bearer identification RB ID of the second DRB; the auxiliary configuration information is radio resource control Protocol RRC reconfiguration message;

The PeNB sends secondary configuration information to the UE, including:

The PeNB sends the RRC reconfiguration message, the RRC reconfiguration message carries the RB ID of the second DRB and the identification ID of the first EPS-Bearer, and the RRC reconfiguration message also carries the Full Config parameter, so The Full Config parameter is used to instruct the UE to bind the first EPS-Bearer and the second DRB.

14. The method according to any one of claims 9 to 13, characterized in that, the PeNB After sending the auxiliary configuration information to the UE, it also includes:

The PeNB receives the data stream sent by the SGW;

The PeNB splits the data stream into a first downlink data stream and a second downlink data stream; the PeNB sends the first downlink data stream to the UE via the SeNB, where, the SeNB The bearer for transmitting the first downlink data stream with the UE is the second DRB; the PeNB sends the second downlink data stream to the UE through a third DRB, and the third DRB is The data radio bearer allocated by the PeNB to the UE in the PCell.

15. A user equipment UE, characterized in that it includes: a first unit, a second unit and a third unit, wherein,

The first unit is configured to receive secondary configuration information sent by the primary base station PeNB. The secondary configuration information includes information about the second data radio bearer DRB allocated by the secondary base station SeNB to the UE in the secondary cell SCell. The SeNB manages the SCell, the SCell is the secondary cell of the UE;

The second unit is used to bind the first evolved packet network bearer EPS-Bearer and the second DRB, wherein the first EPS-Bearer is bound to the first DRB before being bound to the second DRB, The first DRB is the data radio bearer allocated by the PeNB to the UE in the primary cell PCell, the PeNB manages the PCell, and the PCell is the primary cell of the UE;

The third unit is configured to transmit the data stream using the second DRB bound to the first EPS-Bearer.

16. The user equipment according to claim 15, characterized in that,

The first unit is also configured to: receive primary configuration information sent by the PeNB, where the primary configuration information includes information about the first DRB;

The second unit is also used to: bind the first EPS-Bearer and the first DRB.

17. The user equipment according to claim 15 or 16, characterized in that,

The first unit is specifically configured to: receive a radio resource control protocol RRC reconfiguration message sent by the PeNB, where the RRC reconfiguration message carries the radio bearer identification RB ID of the second DRB and the identification ID of the first EPS-Bearer. , the RRC reconfiguration message also carries a full configuration Full Config parameter, and the Full Config parameter is used to instruct the UE to bind the first EPS-Bearer and the second DRB;

The second unit is specifically configured to: after obtaining the Full Config parameter in the RRC reconfiguration message, establish the ID of the first EPS-Bearer and the RB ID of the second DRB in the non-access NAS layer. the mapping relationship between them.

18. The user equipment according to any one of claims 15 to 17, characterized in that, when the SeNB sends the first downlink data stream through the second DRB, the third unit is specifically configured to: Receive the first downlink data stream sent by the SeNB through the second DRB;

The third unit is also configured to: when the UE receives the first downlink data stream sent by the SeNB through the second DRB, if the PeNB sends the second downlink data stream through the third DRB, The UE receives the second downlink data stream sent by the PeNB through the third DRB. The third DRB is bound to the second EPS-Bearer. The third DRB is allocated by the PeNB to the UE in the PCell. Data wireless bearer;

Wherein, the first downlink data flow and the second downlink data flow are obtained by the unified control node SRC diverting the data flow received from the serving gateway SGW, or the first downlink data flow and the third downlink data flow are obtained by dividing the data flow received from the service gateway SGW. The second downlink data stream is obtained by the PeNB offloading the data stream received from the SGW.

19. The user equipment according to any one of claims 15 to 17, characterized in that the data stream is an uplink data stream that the UE needs to send, and the third unit is specifically configured to: An EPS-Bearer determines the second DRB bound to the first EPS-Bearer; sends the uplink data stream that needs to be sent to the SeNB through the second DRB, and the SeNB sends the uplink data stream that needs to be sent. The data stream is sent to SRC or SGW.

20. The user equipment according to any one of claims 15 to 19, characterized in that, the second DRB received by the first unit is established by the SeNB for the UE in the SCell, And the information of the second DRB is obtained by the PeNB from the SeNB and carried in the secondary configuration information and sent to the UE.

21. The user equipment according to any one of claims 15 to 20, characterized in that the first EPS-Bearer used by the second unit is a Default EPS-Bearer for the evolved packet network bearer, or a dedicated EPS-Bearer. The evolved packet network carries Dedicated EPS-Bearer.

22. The user equipment according to any one of claims 15 to 20, characterized in that the first EPS-Bearer used by the second unit is an assisting evolved packet network bearer Assisting EPS-Bearer;

23. A base station, characterized in that the base station is the main base station PeNB, including: a first unit and unit 2, where,

The first unit is used to obtain the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the user equipment UE in the secondary cell SCell, the SeNB manages the SCell, and the SCell is the secondary cell of the UE;

The second unit is configured to send auxiliary configuration information to the UE, where the auxiliary configuration information includes the second

DRB information;

Wherein, the second DRB is used for the UE to bind the first evolved packet network bearer EPS-Bearer and the second DRB to transmit the data flow between the second DRB and the SeNB.

24. The base station according to claim 23, characterized in that, the PeNB further includes: a third unit, wherein,

The third unit is configured to: before the acquisition module acquires the information of the second data radio bearer DRB allocated by the secondary base station SeNB to the user equipment UE in the secondary cell SCell, allocate the first DRB to the UE in the primary cell PCell. , the PeNB manages the PCell, and the PCell is the primary cell of the UE;

The second unit is also configured to: send the main configuration information to the UE, where the main configuration information includes: information about the first DRB;

Wherein, the first DRB is used by the UE to bind the first EPS-Bearer and the first DRB before binding the first EPS-Bearer and the second DRB.

25. The base station according to claim 24, wherein the auxiliary configuration information sent by the second unit is used to instruct the UE to release the binding of the first EPS-Bearer and the first DRB. , and bind the first EPS-Bearer and the second DRB.

26. The base station according to any one of claims 23 to 25, characterized in that the first unit is specifically configured to: receive the information of the second DRB sent by the SeNB; or, receive a unified control node The information of the second DRB sent by the SRC is sent by the SeNB to the SRC.

27. The base station according to any one of claims 23 to 26, characterized in that: the information of the second DRB is the radio bearer identification RB ID of the second DRB; the auxiliary configuration information is radio resource control Protocol RRC reconfiguration message;

The second unit is specifically configured to: send the RRC reconfiguration message, and the RRC reconfiguration message The message carries the RB ID of the second DRB and the identification ID of the first EPS-Bearer. The RRC reconfiguration message also carries a Full Config parameter. The Full Config parameter is used to instruct the UE to bind the first EPS-Bearer. Bearer and 2nd DRB.

28. The base station according to any one of claims 23 to 27, characterized in that the PeNB further includes: a fourth unit and a fifth unit, wherein,

The fourth unit is configured to: after the second unit sends auxiliary configuration information to the UE, receive the data stream sent by the SGW;

The fifth unit is used to split the data stream into a first downlink data stream and a second downlink data stream;

The second unit is also configured to: send the first downlink data flow to the SeNB via the SeNB.

UE, wherein the bearer for transmitting the first downlink data stream between the SeNB and the UE is the second DRB;

The second unit is also configured to: send the second downlink data stream to the UE through a third DRB, where the third DRB is a data radio bearer allocated by the PeNB to the UE in the PCell.