CN105009663B

CN105009663B - Message transmission method and device

Info

Publication number: CN105009663B
Application number: CN201380003783.2A
Authority: CN
Inventors: 时洁; 李亚娟; 柴丽; 常俊仁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-08-09
Filing date: 2013-09-30
Publication date: 2020-02-21
Anticipated expiration: 2033-09-30
Also published as: CN111954314A; CN105009663A; CN111954314B

Abstract

A message transmission method and device. The method comprises the following steps: the terminal receives the RRC message; and the terminal sends the feedback information of the RRC message to the base station generating the RRC message and/or other base stations except the base station generating the RRC message. After the terminal receives the RRC message, the method further includes: the terminal determines the base station and/or base station cell that generated the RRC message. The terminal determining the base station and/or the base station cell generating the RRC message comprises the following steps: the terminal determines the base station and/or the base station cell for generating the RRC message according to the information which is carried in the RRC message and used for identifying the base station and/or the base station cell for generating the RRC message; and/or the terminal determines the base station and/or the base station cell which generates the RRC message according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents.

Description

Message transmission method and device

This application claims priority from PCT patent application No. PCT/CN/2013/081243 entitled "a method and apparatus for message transmission" filed by the chinese patent office on 2013, 8, 9, which is incorporated herein by reference in its entirety.

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for transmitting a message.

Background

A Protocol layer of an LTE (Long Term Evolution) system includes, from top to bottom, a PDCP (Packet Data Convergence Protocol) layer, an RLC (Radio link Control) layer, an MAC (Media Access Control) layer, and a Physical (PHY) layer, in consideration of a user plane; from the Control plane perspective, an RRC (Radio Resource Control) layer above the PDCP layer is also included to provide Control signaling, also referred to as RRC messages, for the Radio network.

After a UE (User Equipment, i.e., a terminal) accesses a network and establishes a connection with an eNB (evolved NodeB, evolved node B, i.e., a base station), the eNB configures a plurality of Radio bearers to the UE by using an RRC message, where the Radio bearers may be divided into a DRB (Data Radio Bearer) and an SRB (Signaling Radio Bearer) according to different functions of the Radio bearers.

Data of the DRB comes from a CN (Core Network) and goes from a PDCP layer to a physical layer by layer, data of the SRB comes from an eNB and goes from the PDCP layer to the physical layer by layer, the eNB finally sends information to the UE through a signal of the physical layer, the UE reversely analyzes data of the eNB through its own PDCP layer, RLC layer, MAC layer and physical layer, and the PDCP layer sends corresponding data to an RRC entity or a data receiving entity of the UE. The UE may pack its data or RRC message from the PDCP layer down to the physical layer, and send the data or RRC message to the eNB through a signal of the physical layer. Fig. 1 and 2 show a control plane protocol stack and a user plane protocol stack, respectively. As shown in fig. 3, a plurality of bearers share one MAC layer, and the MAC entity knows which RLC entity the data packet is from through the RLC interface identifier and the MAC interface identifier in the data packet acquired by the MAC layer, and further knows which bearer the MAC layer data packet is from.

With the further evolution of LTE network architecture, the industry starts to consider small base stations and macro base stations simultaneously serving UEs. At present, a concept of dual connectivity is introduced, that is, when a plurality of base stations provide services for a UE, one of the base stations is a main base station (MeNB) of the UE, and the base station serves as a mobility anchor of the UE and is responsible for terminating a connection between an MME (Mobile management entity) of a core network and the UE, and the other base stations are secondary base stations (senbs) of the UE and provide a offloading service of data packets for the UE, where the data packets received by the secondary base stations may be data packets offloaded from an RRC layer, a PDCP layer, and an RLC layer of the main base station.

Disclosure of Invention

The embodiment of the invention provides a message transmission method and device, which are used for realizing that a terminal sends feedback information of an RRC message to a base station under a network architecture with a plurality of base stations serving the terminal.

A method of message transmission, comprising:

the terminal receives the RRC message; and the terminal sends the feedback information of the RRC message to the base station generating the RRC message and/or other base stations except the base station generating the RRC message.

In a preferred mode, the terminal receives a random access response message; and the terminal sends the feedback information of the random access response message to the base station generating the random access response message and/or other base stations except the base station generating the random access response message.

In a preferred mode, after the terminal receives the RRC message, the method further includes: the terminal determines the base station and/or base station cell that generated the RRC message. Further, the determining, by the terminal, the base station and/or the base station cell that generates the RRC message includes: the terminal determines the base station and/or the base station cell for generating the RRC message according to the information which is carried in the RRC message and used for identifying the base station and/or the base station cell for generating the RRC message; and/or the terminal determines the base station and/or the base station cell which generates the RRC message according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents. The information for identifying the base station and/or the base station cell generating the RRC message is the identification of the base station and/or the base station cell; or, the information for identifying the base station and/or the base station cell generating the RRC message is a transmission identifier of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier. And the mapping relation is sent to the terminal after being negotiated between the base stations and/or base station cells.

When the information identifying the base station and/or the base station cell is a transmission identifier of an RRC message, the terminal determines, according to the transmission identifier of the RRC message carried in the RRC message, that the base station and/or the base station cell generating the RRC message is generated, and before the determining, the method further includes: the terminal acquires the mapping relation information between the transmission identifier and the base station sent by the base station or locally stored, and/or the mapping relation information between the transmission identifier and the base station cell.

In a preferred embodiment, the RRC message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the RRC message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message.

In a preferred mode, the random access response message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

The indication information is used for indicating one of the following:

indicating a receiving base station and/or a base station cell of the feedback information of the RRC message to forward the feedback information of the RRC message received currently;

indicating a receiving base station and/or a base station cell of the feedback information of the RRC message to analyze the feedback information of the RRC message received at present to an RRC layer;

indicating a receiving base station and/or a base station cell of the feedback information of the RRC message to forward the received feedback information of the RRC message to a target base station and/or cell information of the target base station;

indicating the base station and/or base station cell that generated the RRC message.

A terminal, comprising: a transceiver for receiving an RRC message; sending the feedback information of the RRC message generated by the processor to a base station generating the RRC message and/or to other base stations except the base station generating the RRC message; and the processor is used for generating the feedback information of the RRC message according to the RRC message received by the transceiver.

In a preferred mode, the transceiver is configured to receive a random access response message; sending the feedback information of the random access response message generated by the processor to the base station generating the random access response message and/or to other base stations except the base station generating the random access response message; the processor is configured to generate feedback information of the random access response message according to the random access response message received by the transceiver.

In a preferred mode, the processor is further configured to determine a base station and/or a base station cell generating the RRC message after the transceiver receives the RRC message.

In a preferred embodiment, the processor is specifically configured to determine, according to information carried in the RRC message and used for identifying a base station and/or a base station cell that generates the RRC message, the base station and/or the base station cell that generates the RRC message; and/or determining the base station and/or the base station cell which generates the RRC message according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents. Further, the information for identifying the base station and/or the base station cell that generates the RRC message is an identifier of the base station and/or the base station cell; or, the information for identifying the base station and/or the base station cell generating the RRC message is a transmission identifier of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

In the above embodiments of the present invention, the terminal sends the feedback information of the RRC message to the base station that generates the RRC message, or to other base stations, or to the base station that generates the RRC message and other base stations, so that the terminal sends the feedback information of the RRC message to the base station in multiple flexible ways under a network architecture in which multiple base stations serve the terminal.

Another embodiment of the present invention provides a message transmission method and device, which are used to implement that a base station sends an RRC message to a terminal under a network architecture in which a plurality of base stations serve the terminal.

A method of message transmission, comprising: the first base station generates an RRC message; the first base station sends the RRC message to a terminal; and/or the first base station sends the RRC message or the RRC message processing data packet to the terminal through a second base station, wherein the number of the second base stations is one or more.

In a preferred mode, the first base station generates a random access response message; and the first base station sends the random access response message to the terminal, and/or sends the random access response message or the random access response message processing data packet to the terminal through a second base station, wherein the number of the second base stations is one or more. Further, the random access response message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

In a preferred embodiment, the RRC message carries information for identifying a base station and/or a base station cell that generated the RRC message. Further, the information for identifying the base station and/or the base station cell that generates the RRC message is an identifier of the base station and/or the base station cell; or, the information for identifying the base station and/or the base station cell generating the RRC message is a transmission identifier of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

An RRC message transmission method, comprising: the second base station receives an RRC message or an RRC message processing data packet sent by the first base station, wherein the RRC message or the RRC message processing data packet is generated by the first base station; and the second base station sends the RRC message to the terminal through a bearing channel which is used for forwarding the RRC message generated by the first base station.

In a preferred mode, the second base station receives a random access response message or a random access response message processing data packet sent by the first base station, wherein the random access response message or the random access response message processing data packet is generated by the first base station; and the second base station sends the random access response message to the terminal through a bearing channel which is used for forwarding the random access response message generated by the first base station. Further, the random access response message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

A base station, comprising: a processor configured to generate an RRC message; a transceiver for transmitting the RRC message generated by the processor to a terminal; and/or sending the RRC message or the RRC message processing data packet to a terminal through a second base station, wherein the number of the second base stations is one or more.

A base station, comprising: the transceiver is used for receiving an RRC message or an RRC message processing data packet sent by the first base station, wherein the RRC message or the RRC message processing data packet is generated by the first base station; sending the RRC message to the terminal through a bearing channel for forwarding the RRC message generated by the first base station; wherein.

In the above embodiments of the present invention, the base station that generates the RRC message sends the RRC message to the terminal, or forwards the RRC message to the terminal through another base station, so that the RRC message generated by the base station is sent to the terminal in multiple flexible manners under a network architecture in which multiple base stations serve the terminal.

Another embodiment of the present invention provides a method and an apparatus for bearer path configuration, which are used to establish a bearer path for transmitting an RRC message in a network architecture in which a plurality of base stations serve terminals.

A radio bearer configuration method comprises the following steps: the first base station sends an RRC message transmission configuration request message to the second base station, wherein the RRC message transmission configuration request message is used for requesting the second base station to establish a bearer channel for forwarding the RRC message or the RRC message processing data packet generated by the first base station.

In a preferred embodiment, the requesting the second base station to establish a bearer path for forwarding the RRC message generated by the first base station or the RRC message processing data packet includes: the method is used for requesting the second base station to establish a bearer channel for forwarding the RRC message or RRC message processing data packet generated by the signaling radio bearer of the first base station.

In a preferred embodiment, the RRC message transmission configuration request message carries one or a combination of the following information:

a first base station sends bearer channel configuration information of an RRC message generated by the first base station;

the first base station transmits the RRC message generated by the second base station or the bearing channel configuration information of the RRC message processing data packet;

the first base station expects the second base station to establish the configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet.

Wherein, the expecting the second base station to establish the bearer channel configuration information for the second base station to forward the RRC message generated by the first base station includes: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

A radio bearer configuration method comprises the following steps: the second base station receives a configuration request message of an RRC message transmission channel sent by the first base station; and the second base station establishes a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the configuration request message of the RRC message transmission channel.

A base station, comprising: the processor is used for generating an RRC message transmission configuration request message, the RRC message transmission configuration request message is used for requesting a second base station to establish a bearer channel for forwarding an RRC message generated by a first base station or processing a data packet by the RRC message, and the first base station is the local base station; and the transceiver is used for sending the RRC message transmission configuration request message generated by the processor to the second base station.

A base station, comprising: the transceiver is used for receiving a configuration request message of an RRC message transmission channel sent by a first base station; and the processor is used for establishing a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the configuration request message of the RRC message transmission channel received by the transceiver, wherein the second base station is the local base station.

The technical effects are as follows: in the above embodiment of the present invention, a base station initiates a configuration request of an RRC message transmission channel to another base station, so that the other base station can establish a bearer channel of an RRC message or an RRC message processing data packet according to the message, and forward the RRC message or the RRC message processing data packet generated by the base station initiating the configuration request, thereby implementing transmission of the RRC message or the RRC message processing data packet between the base station and the terminal through forwarding between the base stations under a network architecture in which a plurality of base stations serve the terminal.

A control plane data packet forwarding method comprises the following steps: the first base station sends a control plane data packet and control information to the second base station, so that the second base station sends the control plane data packet and/or scheduling information of the second base station according to the control information; wherein the indication information is sent before, after or simultaneously with the control plane data packet.

A control plane data packet forwarding method comprises the following steps: the second base station receives the control plane data packet and the indication information sent by the first base station; the indication information is sent before, after or simultaneously with the control plane data packet; and the second base station sends the control plane data packet and/or the scheduling information of the second base station according to the control information.

A base station, comprising: the transceiver is used for sending a control plane data packet and indication information to the second base station so that the second base station sends the control plane data packet and/or scheduling information of the second base station according to the control information; wherein the indication information is sent before, after or simultaneously with the control plane data packet.

A base station, comprising: the transceiver is used for receiving a control plane data packet and indication information sent by a first base station; the indication information is sent before, after or simultaneously with the control plane data packet; and the processor is used for sending the control plane data packet and/or the scheduling information of the second base station according to the control information.

Another embodiment of the present invention provides a message transmission method and device, which are used to implement forwarding according to carried information when forwarding a control plane packet between base stations in a network architecture in which a plurality of base stations serve terminals, so that the forwarding of the control packet conforms to a specified policy.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a diagram of a control plane protocol stack in the prior art;

FIG. 2 is a diagram of a user plane protocol stack in the prior art;

FIG. 3 is a diagram illustrating a mapping to a MAC layer according to the prior art;

fig. 4 is a schematic diagram of an architecture for generating and transmitting RRC messages according to an embodiment of the present invention;

fig. 5, fig. 6, fig. 7, fig. 8, fig. 9A, fig. 9B, fig. 9C, and fig. 9D are respectively diagrams of RRC messaging architecture in an embodiment of the present invention;

fig. 10A and fig. 10B are schematic diagrams illustrating a transmission flow of an RRC message according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a transmission flow of feedback information of an RRC message according to an embodiment of the present invention;

fig. 12 and fig. 16 are schematic diagrams illustrating bearer channel configuration according to an embodiment of the present invention;

fig. 13 and fig. 17 are schematic diagrams illustrating a modification process of a bearer channel according to an embodiment of the present invention;

fig. 14 and fig. 18 are schematic diagrams illustrating a bearer path release procedure according to an embodiment of the present invention;

fig. 15 is a schematic diagram of a control plane packet forwarding flow according to an embodiment of the present invention;

fig. 19A and fig. 19B are schematic structural diagrams of a base station applied to scheme one according to an embodiment of the present invention;

fig. 20 is a schematic structural diagram of a terminal applied to scheme two according to an embodiment of the present invention;

fig. 21A and 21B are schematic structural diagrams of a base station applied to scheme three according to an embodiment of the present invention;

fig. 21C is a schematic structural diagram of a terminal applied to scheme three according to the embodiment of the present invention;

fig. 22A and fig. 22B are schematic structural diagrams of a base station applied to scheme four according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a method for sending an RRC message, a method for sending feedback information of the RRC message, a method for configuring and managing a bearer channel and a method for forwarding a control plane data packet, aiming at a network architecture for serving a terminal by a plurality of base stations.

For a more clear description of the embodiments of the present invention, the following four schemes are described below:

the first scheme is as follows: a transmission method of an RRC message is described from the base station side;

scheme II: a transmission method of feedback information of an RRC message is described from a terminal side;

the third scheme is as follows: a method for configuring a bearer channel is described;

and the scheme is as follows: a method of forwarding control plane packets is described.

Before describing embodiments of the present invention in detail, the following reservations are first made:

(1) the embodiment of the invention mainly focuses on the transmission process of the RRC message and/or the transmission process of the feedback information of the RRC message, and the process mainly relates to the processing operation of an RRC layer, a PDCP layer, an RLC layer, an MAC layer and a PHY layer. For convenience of description, in the embodiment of the present invention, a protocol entity of the RRC layer is referred to as an RRC entity unit, a protocol entity of the PDCP layer is referred to as a PDCP entity unit, a protocol entity of the RLC layer is referred to as an RLC entity unit, a protocol entity of the MAC layer is referred to as an MAC entity unit, and a protocol entity of the PHY layer is referred to as a PHY entity unit.

(2) The bearer for transmitting (sending or forwarding) the RRC message or processing the data packet with the RRC message in the embodiment of the present invention refers to a logical unit combination formed by a PDCP entity unit, an RLC entity unit, and an LCID (logical Channel ID, logical Channel identifier), and may include logical units such as an MAC entity unit and a PHY entity unit. For example, a complete channel from a sending end of an RRC message or an RRC message processing packet to a receiving end mainly includes an RRC entity unit, a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit on a network side, and a PHY entity unit, an MAC entity unit, an RLC entity unit, and a PDCP entity unit on a terminal side. In the following description, bearer path configurations under various architectures will be described in detail. For convenience of description, in the embodiment of the present invention, a logical unit or a combination of logical units of the above-defined complete bearer channel on a base station is referred to as a bearer channel through which the base station transmits (sends or forwards) an RRC message or an RRC message processing data packet. For example, if a network side PDCP entity unit in a complete bearer channel is located on the MeNB and other protocol layer entity units on the network side are located on the SeNB, the bearer channel through which the MeNB sends the RRC message generated by the MeNB includes the PDCP entity unit on the MeNB, and the bearer channel through which the SeNB forwards the RRC message generated by the MeNB or the RRC message processing packet includes the RLC entity unit, the MAC entity unit, and the PHY entity unit on the SeNB.

(3) The base station (e.g. eNB) mentioned in the embodiments of the present invention refers to a base station and/or a base station cell.

The embodiment of the invention is suitable for two RRC message generation and transmission architectures shown in figure 4. As shown in fig. 4, under the architecture C1, the SeNB passes parameters related to the UE for generating the RRC message to the MeNB, generates a final RRC message by the MeNB, and sends the generated RRC message to the UE using a bearer channel of the MeNB and/or the SeNB. Under the architecture C2, the MeNB function and architecture are the same as those under the architecture 1, but the function of the SeNB is further extended, and the SeNB may also generate an RRC message and may optionally send the RRC message to the UE using the bearer channel of the MeNB and/or the SeNB.

It should be noted that fig. 4 shows a network architecture having one SeNB serving the UE, and in practical applications, there may be multiple senbs serving the UE, and the scenario may also adopt the above four schemes provided by the embodiment of the present invention.

The following takes the RRC message generation and transmission architecture shown in fig. 4 as an example to describe the structure of a bearer tunnel for transmitting RRC messages, and the principle is applicable to a network architecture in which a UE has multiple senbs.

In the case of the architecture C2 shown in fig. 4, the following transmission architectures can be adopted according to whether bearer paths for the base station to send the RRC message generated by the base station and to forward the RRC message generated by another base station or to process a data packet with the RRC message are independent, and according to the offloading situation of the RRC message:

transmission architecture 1: sending and forwarding of RRC messages using shared bearer channels

Under the transmission architecture, the base station sends the RRC message generated by the base station, and forwards the RRC message generated by other base stations or the RRC message processing data packet, and the same bearer channel is used. Specifically, the PDCP entity unit and the RLC entity unit used when the MeNB sends the RRC message generated by the MeNB itself may also be used to forward the RRC message generated by the SeNB or an RRC message processing data packet. Similarly, the PDCP entity unit and the RLC entity unit used by the SeNB when sending the RRC message generated by the SeNB itself may also be used to forward an RRC message or an RRC message processing packet generated by the MeNB or another SeNB (in a scenario where there are multiple senbs).

On the base station side, the MeNB sends the RRC message generated by the MeNB and a bearer tunnel for forwarding the RRC message generated by the SeNB or a data packet processed by the RRC message, which may include a PDCP entity unit, an RLC entity unit, a MAC entity unit, and a PHY entity unit on the MeNB, or include: an RLC entity unit, an MAC entity unit and a PHY entity unit. Similarly, the bearer for the SeNB to send the RRC message generated by the SeNB and to forward the RRC message or the RRC message processing data packet generated by the MeNB or another SeNB (in a scenario where there are multiple senbs), may also include a PDCP entity unit, an RLC entity unit, a MAC entity unit, and a PHY entity unit on the SeNB, or include: an RLC entity unit, an MAC entity unit and a PHY entity unit.

On the UE side, the UE configures bearer channels for receiving RRC messages for the MeNB and the senbs, respectively. The tunnel used by the UE side to receive the RRC message may include logical units of the UE, such as a PHY entity unit, a MAC entity unit, an RLC entity unit, and a PDCP entity unit.

The RLC entity unit in the channel for transmitting the RRC message may correspond to an independent MAC entity unit, whether on the base station side or the UE side.

A typical structure of the transmission architecture 1 can be seen in fig. 5. Wherein, the bearer channel 1 is a bearer channel for sending an RRC message generated by the MeNB; the bearer channel 2 is a bearer channel for forwarding the RRC message generated by the MeNB through the SeNB; bearer path 3 is a bearer path for sending RRC messages generated by the SeNB; the bearer path 4 is a bearer path through which the RRC message generated by the SeNB is forwarded through the MeNB. The UE may receive the RRC message generated by the MeNB through the bearer channel 1 and/or the bearer channel 2, and may receive the RRC message generated by the SeNB through the bearer channel 3 and/or the bearer channel 4. The bearer channels are SRB-level channels.

Transmission architecture 2: sending and forwarding of RRC message, using independent bearer channel, and carrying out RRC message shunting by PDCP entity unit

Under the transmission architecture, the base station sends the RRC message generated by the base station, and forwards the RRC message generated by other base stations or the RRC message processing data packet, and different bearer channels are used. Specifically, the PDCP entity unit and the RLC entity unit used by the MeNB to send the RRC message generated by the MeNB, and the PDCP entity unit and the RLC entity unit for forwarding the RRC message generated by the SeNB or the RRC message processing packet, are two independent logical units. Similarly, the PDCP entity unit and the RLC entity unit used by the SeNB to send the RRC message generated by the SeNB itself, and the PDCP entity unit and the RLC entity unit to forward the RRC message or RRC message processing packet generated by the MeNB or another SeNB (in a scenario with multiple senbs), are two independent groups of logic units.

At the base station side, the bearer tunnel through which the MeNB sends the RRC message generated by the MeNB may include a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit on the MeNB; the bearer for the MeNB to forward the RRC message generated by the SeNB or the RRC message processing data packet may include a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit, where a bearer formed by the RLC entity unit, the MAC entity unit, and the PHY entity unit in the bearer for the MeNB to forward the RRC message generated by the SeNB or the RRC message processing data packet and the PDCP entity unit in the SeNB (which may be the PDCP entity unit in the bearer for the SeNB to send the RRC message generated by the SeNB, or an independent PDCP entity unit) is used to provide services for the UE. Similarly, the bearer for the SeNB to send the RRC message generated by the SeNB may include a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit on the SeNB; the bearer for the SeNB to forward the RRC message generated by the MeNB or another SeNB (in a scenario where there are multiple senbs) or the RRC message processing data packet may include a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit, where the RLC entity unit, the MAC entity unit, and the PHY entity unit are used to provide service for the UE, and the bearer is composed of the PDCP entity unit in the base station (MeNB or another SeNB) that generates the RRC message or the RRC message processing data packet (which may be the PDCP entity unit in the bearer for the base station that generates the RRC message or the RRC message processing data packet to send the RRC message generated by the base station, or an independent PDCP entity unit).

On the UE side, the UE configures bearer channels for receiving RRC messages for bearer channels for transmitting RRC messages generated by the base station on the MeNB and each SeNB, and bearer channels for forwarding RRC messages generated by other base stations. The tunnel used by the UE side to receive the RRC message may include logical units of the UE, such as a PHY entity unit, a MAC entity unit, an RLC entity unit, and a PDCP entity unit.

A typical structure of the transmission architecture 2 can be shown in fig. 6, in which bearer channels on the MeNB are separately presented for convenience of describing a data transmission process. Wherein, the bearer channel 1 is a bearer channel for sending an RRC message generated by the MeNB; the bearer channel 2 is a bearer channel for forwarding the RRC message generated by the MeNB through the SeNB; bearer path 3 is a bearer path for sending RRC messages generated by the SeNB; the bearer path 4 is a bearer path through which the RRC message generated by the SeNB is forwarded through the MeNB. The UE may receive the RRC message generated by the MeNB through the bearer channel 1 and/or the bearer channel 2, and may receive the RRC message generated by the SeNB through the bearer channel 3 and/or the bearer channel 4. The bearer channels are SRB-level channels.

Transmission architecture 3: sending and forwarding of RRC message, using independent bearer channel, and shunting RRC message by RLC entity unit

The transmission architecture is basically similar to the transmission architecture 2, and the base station transmits the RRC message generated by the base station and forwards the RRC message generated by other base stations or the RRC message processing data packet, and uses different bearer channels. Different from the transmission architecture 2 described above: the forwarding of the RRC message generated by the other base station or the bearer channel of the RRC message for processing the data packet by the base station may include: an RLC entity unit, an MAC entity unit and a PHY entity unit.

A typical structure of the transmission architecture 3 can be shown in fig. 7, in which bearer channels on the MeNB are separately presented for convenience of describing a data transmission process. Wherein, the bearer channel 1 is a bearer channel for sending an RRC message generated by the MeNB; the bearer channel 2 is a bearer channel for forwarding the RRC message generated by the MeNB through the SeNB; bearer path 3 is a bearer path for sending RRC messages generated by the SeNB; the bearer path 4 is a bearer path through which the RRC message generated by the SeNB is forwarded through the MeNB. The UE may receive the RRC message generated by the MeNB through the bearer channel 1 and/or the bearer channel 2, and may receive the RRC message generated by the SeNB through the bearer channel 3 and/or the bearer channel 4. The bearer channels are SRB-level channels.

In the case of the architecture C1 shown in fig. 4, according to the offloading situation of the RRC message, the method can be further divided into the transmission architecture 4 and the transmission architecture 5:

transmission architecture 4: RLC message offloading by an RLC entity unit

Under the transmission architecture, the RRC message can only be generated by the MeNB, and therefore, a bearer tunnel forwarding the RRC message may include a PDCP entity unit, an RLC entity unit, an MAC entity unit, and a PHY entity unit on the MeNB, and the bearer tunnel may include, on the SeNB: RLC entity unit, MAC entity unit, PHY entity unit.

On the UE side, the UE configures independent logical unit combinations for bearer tunnels for transmitting RRC messages on the MeNB and the senbs, respectively. Wherein, the logical unit combination corresponding to the MeNB may include: PDCP entity unit, RLC entity unit, MAC entity unit, PHY entity unit, and the combination of logic units corresponding to the SeNB may include: RLC entity unit, MAC entity unit, PHY entity unit.

A typical structure of the transmission architecture 4 can be shown in fig. 8. Wherein, the bearer channel 1 is a bearer channel for the MeNB to send an RRC message; bearer path 2 is a bearer path for the MeNB to forward RRC messages through the SeNB. The UE may receive the RRC message through bearer channel 1 and/or bearer channel 2. The bearer channels are SRB-level channels.

Transmission architecture 5: RLC message offloading by PDCP entity unit

The transmission architecture differs from the transmission architecture 5 in that: the bearer path for forwarding the RRC message includes, on the SeNB: the PDCP entity also comprises a PDCP entity unit; the bearer channel also includes a PDCP entity unit at the UE side.

A typical structure of the transmission architecture 4 can be shown in fig. 9A. Wherein, the bearer channel 1 is a bearer channel for the MeNB to send an RRC message; bearer path 2 is a bearer path for the MeNB to forward RRC messages through the SeNB. The UE may receive the RRC message through bearer channel 1 and/or bearer channel 2. The bearer channels are SRB-level channels.

The transmission architecture 6: both the first base station and the second base station can generate RRC messages, and the generated RRC messages need to be forwarded through other base stations

A typical structure of the transmission architecture 6 can be shown in fig. 9B. The bearer channel 1 is a bearer channel for sending an RRC message generated by the MeNB, and the bearer channel includes, on a network side, a PDCP entity unit on the first base station and an RLC entity unit, an MAC entity unit, and an PYH entity unit on the second base station; the bearer 2 is a bearer for sending an RRC message generated by the SeNB, and includes, on the network side, a PDCP entity unit on the second base station and an RLC entity unit, an MAC entity unit, and PYH entity units on the first base station. The bearer channels are SRB-level channels.

The transmission architecture 7:

a typical structure of the transmission architecture 7 can be shown in fig. 9C. It can be seen that a set of logical units (PDCP entity unit, RLC entity unit, MAC entity unit, PHY entity unit) of the bearer channel 3 on the first base station is used for transmitting the RRC message generated by the first base station, and the bearer channel 2 and the bearer channel 6 share another set of logical units (RLC entity unit, MAC entity unit, PHY entity unit) on the first base station, where the bearer channel 2 is a bearer channel to which the RRC message generated by the second base station is forwarded by the first base station, and the bearer channel 6 is a bearer channel to which the RRC message generated by the first base station is directly transmitted to the terminal. Similarly, the second base station also has a similar RRC message transmission structure.

The transmission architecture 8:

a typical structure of the transmission architecture 7 can be shown in fig. 9D, the transmission structure of fig. 9D is similar to that of fig. 6, a carrying channel 5 and a carrying channel 6 are added on the basis of fig. 6, for clarity, only the newly added carrying channel 5 and carrying channel 6 are shown in fig. 9D, and the carrying channels 1-4 can refer to fig. 6.

In the above various transmission architectures, a bearer for transmitting the RRC message may exist between the RRC entity units between the first base station and the second base station.

For convenience of description, a bearer in one base station for transmitting the RRC message generated by the base station is referred to as a first bearer of the base station, and a bearer in the base station for forwarding the RRC message generated by another base station or an RRC message processing packet is referred to as a second bearer of the base station. For example, in fig. 5, the logical units in the MeNB, such as the PDCP entity unit, the RLC entity unit, the MAC entity unit, and the PHY entity unit, form a first bearer channel of the MeNB, and the second bearer channel of the MeNB also forms these logical units, that is, the first bearer channel and the second bearer channel of the MeNB may be considered as the same bearer channel; in fig. 6, the logical units such as the PDCP entity unit, the RLC entity unit, the MAC entity unit, and the PHY entity unit in the MeNB form a first bearer path of the MeNB, and the second bearer path of the MeNB is formed by another group of logical units such as the PDCP entity unit, the RLC entity unit, the MAC entity unit, and the PHY entity unit, that is, the first bearer path and the second bearer path of the MeNB may be considered as different bearer paths.

It should be noted that the first bearer channel in the base station includes a downlink channel and/or an uplink channel, and similarly, the second bearer channel in the base station may also include an uplink channel and/or a downlink channel.

The RRC message mentioned in the embodiments of the present invention may include one or a combination of the following messages: a connection establishment message, an RRC reconfiguration message, and an RRC connection reestablishment message.

The RRC message processing data packet mentioned in each aspect of the embodiment of the present invention may be one of the following data packets of an RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, data packets at the physical layer.

The RRC message corresponding to the feedback information of the RRC message in the embodiments of the present invention includes one of the following: an RRC connection setup complete message, an RRC connection setup failure message, an RRC reconfiguration complete message, an RRC reconfiguration failure message, an RRC connection reestablishment complete message, and an RRC connection reestablishment failure message.

The feedback information of the RRC message mentioned in the embodiments of the present invention may be an RRC message of an RRC layer; it may also be one of the following processing packets of the RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, data packets at the physical layer.

The feedback information of the RRC message may also include a message actively reported by the terminal. For example, a measurement report message of the terminal. After the terminal acquires the RRC message related to the measurement configuration sent by the base station, the terminal replies an RRC feedback message to the base station indicating that the measurement configuration is completed, and then may further feed back a measurement report message in the following, where the measurement report message is also one of the feedback information of the RRC message. Therefore, after receiving the RRC message, the terminal may report the feedback information of the RRC message one or more times, and the feedback information of the RRC message reported each time may be different. The specific content of the feedback information of the RRC message needs to be determined according to the actual scene.

The four schemes are described in detail below.

For convenience of description, some terms will be first explained. In the following embodiments, the first base station and the second base station are normal base stations. Or, the first base station is a main base station, and the second base station is an auxiliary base station. Or the first base station is a main base station and the second base station is a main base station, or the first base station is an auxiliary base station and the second base station is an auxiliary base station.

A master base station (MeNB), which may also be referred to as an anchor base station, or virtual base station. The main base station may be responsible for terminating the S1-MME, and the base station may serve as a mobility anchor point for the core network, or may be a macro base station. The secondary base station (SeNB) is a base station that is not the first base station, and is also a small base station (e.g., Pico, Femto, LoMo, AP, LPN, RRH described above), which may also be referred to as a small cell base station, and may provide data offloading service for the UE. In addition, the second base station may also be a first network node, and in this case, the base station to which the first network node belongs may be a first base station, which is not limited in the present invention.

One UE may correspond to one or more secondary base stations. Therefore, the second base station of the present invention is understood to be a generic term for base stations belonging to the same category as the non-first base station, which is called the second base station, and not only refers to a single second base station. The first base station and the second base station may provide separate bearer services for the UE. The first base station may also be understood as a first type base station.

The main base station and the auxiliary base station can provide dual-connection service for the UE and/or provide separated bearing service.

The first scheme is as follows: RRC message transmission method

Referring to fig. 10A, a flow chart of RRC message transmission according to an embodiment of the present invention is shown, where the flow chart may include:

step 101: the first base station generates an RRC message;

step 102: the first base station sends the RRC message to the terminal; and/or the first base station sends the RRC message or the processing data packet of the RRC message to the terminal through the second base station, wherein the number of the second base stations is one or more.

Here, "first base station" may represent MeNB or SeNB, and if "first base station" represents MeNB, then "second base station" represents SeNB; if the "first base station" represents a SeNB, the "second base station" may represent a MeNB and/or other senbs.

In step 101, in order to enable the UE to identify the base station and/or the base station cell generating the RRC message, the first base station carries information identifying the base station and/or the base station cell generating the RRC message in the RRC message generated by the first base station.

The information for identifying the base station and/or base station cell that generated the RRC message may be: an identity of the base station and/or the base station message of the RRC message is generated. In this way, the UE can identify the base station and/or the base station cell generating the RRC message according to the identifier of the base station and/or the base station message generating the RRC message, which is carried in the RRC message.

The information for identifying the base station and/or the base station cell that generated the RRC message may also be a transmission identifier of the RRC message. The base station and the transmission identifier have a mapping relationship, and/or the base station cell and the transmission identifier have a mapping relationship, and different base stations or base station cells can use different transmission identifiers. The transmission identification of the RRC message may be a Transaction ID (Transaction identification) of the RRC message. The mapping relationship may be pre-configured on the UE, or may be negotiated between the first base station and the second base station, and further, the first base station and/or the second base station sends the negotiated mapping relationship information to the UE. Thus, the UE can determine the base station and/or the base station cell generating the RRC message according to the transmission identifier of the RRC message carried in the RRC message and the mapping relationship between the transmission identifier and the base station and/or the base station cell. The mapping relationship between the transmission identifier and the base station can adopt various expressions, and one preferable expression is xx-yy, wherein xx represents the transmission identifier, and yy represents the corresponding base station. Of course, the meanings of xx and yy can be interchanged.

In step 101, the first base station may distinguish the content of the RRC message generated by itself from the content of the RRC message generated by another base station according to protocol regulations in order for the UE to recognize the base station and/or the base station cell that generated the RRC message. The RRC message content here may be an IE (Information Element) of the RRC message. For example, a protocol may specify: the RRC message IEs generated by MeNB and SeNB are completely distinguishable, e.g., the RRC message generated by SeNB is completely related to the scheduling of SeNB, and no such message is generated by MeNB. Vice versa, the RRC messages generated by the MeNB are also not generated by the SeNB. In this way, the UE can identify the base station that generated the RRC message according to the specific content of the RRC message.

In step 101, in order to enable the UE to identify the base station and/or the base station cell that generates the RRC message, or to enable the UE to send feedback information of the RRC message to a specified base station through a specified bearer channel, the first base station may also carry the following indication information in the generated RRC message: and indication information for indicating a bearer channel for transmitting the feedback information of the RRC message, or indication information for indicating a base station and/or base station cell information for receiving the feedback information of the RRC message. Wherein, the bearer path indicated by the former may be a bearer path from the first base station to the UE by the RRC message generated by the first base station (such as DL-1 in fig. 5, DL-1 in fig. 6 or DL-1 in fig. 7), and/or a bearer path forwarded by the RRC message generated by the first base station through the second base station (such as DL-2 in fig. 5, DL-2 in fig. 6 or DL-2 in fig. 7); the base station and/or base station cell information indicated by the latter may be an identifier of the base station and/or base station cell that generated the RRC message, and/or an identifier of another base station and/or base station cell, where the another base station needs to receive the feedback information of the RRC message and forward the feedback information through an air interface although the another base station is not the generating base station of the RRC message. The identity of the base station and/or the base station Cell is further a Cell Global identity of an ecgi (evolved Cell Global identity) evolution, and/or a pci (physical Layer Cell identity) physical Layer Cell identity. In step 102, the first base station may send, to the terminal, the RRC message through a downlink channel of a first bearer channel of the RRC message generated by the first base station; and/or the first base station sends the RRC message or the RRC message processing data packet generated by the first base station to the second base station, and the second base station forwards the second bearer channel of the RRC message or the RRC message processing data packet generated by the first base station through the second base station and forwards the received RRC message or the RRC message processing data packet to the terminal.

Further, the process shown in fig. 10A may further include the following steps:

step 103: the first base station receives feedback information of an RRC message sent by the UE, wherein the feedback information of the RRC message carries indication information and/or a transmission identifier.

For the specific meaning of the indication information and/or the transmission identifier carried in the feedback information of the RRC message, and the related description of the carrying manner, see scheme two.

Referring to fig. 10B, a flow chart of RRC message transmission according to an embodiment of the present invention is shown, where the flow chart may include:

step 104: and the first base station receives the RRC message or the RRC message processing data packet generated by the second base station, and forwards the RRC message or the RRC message processing data packet generated by the second base station. Specifically, the first base station may forward, through the first base station, the RRC message generated by the second base station or the downlink channel of the second bearer channel of the RRC message processing data packet, and forward the received RRC message or the RRC message processing data packet.

If the first base station determines, according to the indication information and/or the transmission identifier carried in the received feedback information of the RRC message, that the feedback information of the RRC message needs to be forwarded, after step 104, the method further includes the following steps:

step 105: and the first base station transmits the feedback information of the received RRC message through an uplink channel of a bearer channel of the RRC message generated by the second base station forwarded by the first base station. Here, the "second base station" needs to be determined according to the indication information and/or the transmission identifier carried in the feedback information of the RRC message. Specifically, after the PDCP entity unit of the first base station parses the indication information in the PDCP SDU or PDCP PDU corresponding to the feedback information of the received RRC message, the PDCP entity unit of the second base station forwards the PDCP SDU or PDCP PDU to the PDCP SDU of the second base station according to the indication information.

Further, the first scheme may further include a process that the base station sends configuration information of a bearer channel for transmitting the RRC message to the UE, where the process may include: the first base station sends configuration information of a bearer channel for sending RRC messages and/or RRC message processing data packets to the UE. The "first base station" may represent an MeNB or an SeNB. The content of the configuration information of the bearer channel sent by the base station to the UE is substantially the same as the content of the configuration information of the bearer channel transmitted in the process of configuring the bearer channel between the base stations, and reference may be made to the description of the subsequent scheme three.

As can be seen from the above description of the first scheme, the embodiment of the present invention provides a method for sending an RRC message for a scenario in which multiple base stations serve a terminal, and the RRC message can be directly sent to the terminal by a generating base station or forwarded to the terminal by other base stations according to actual needs. Further, in order to enable the terminal to send the feedback information of the RRC message to the base station that generates the RRC message or to the designated base station, the embodiment of the present invention improves the method for the base station to send the RRC message, and enables the terminal to identify the source of the RRC message by carrying the indication information, so as to determine the bearer channel for sending the feedback information of the RRC message. The above scheme is applicable to various RRC message transmission architectures.

Another message transmission flow in the first scheme may include:

step 1: the first base station generates a random access response message;

step 2: the first base station sends the random access response message to the terminal; and/or the first base station sends the random access response message or the processing data packet of the random access response message to the terminal through the second base station, wherein the number of the second base stations is one or more.

In step 1, in order to enable the UE to identify the base station and/or the base station cell generating the random access response message, the first base station carries information for identifying the base station and/or the base station cell generating the random access response message in the random access response message generated by the first base station.

The information for identifying the base station and/or the base station cell generating the random access response message may be: an identification of the base station and/or base station message that generated the random access response message. In this way, the UE can identify the base station and/or the base station cell generating the random access response message according to the identifier of the base station and/or the base station message generating the random access response message carried in the random access response message.

The information for identifying the base station and/or the base station cell generating the random access response message may also be a transmission identifier of the random access response message. The base station and the transmission identifier have a mapping relationship, and/or the base station cell and the transmission identifier have a mapping relationship, and different base stations or base station cells can use different transmission identifiers. The transmission identification of the random access response message may be a Transaction ID (Transaction identification) of the random access response message. The mapping relationship may be pre-configured on the UE, or may be negotiated between the first base station and the second base station, and further, the first base station and/or the second base station sends the negotiated mapping relationship information to the UE. In this way, the UE can determine the base station and/or the base station cell that generates the random access response message according to the transmission identifier of the random access response message carried in the random access response message and the mapping relationship between the transmission identifier and the base station and/or the base station cell. The mapping relationship between the transmission identifier and the base station can adopt various expressions, and one preferable expression is xx-yy, wherein xx represents the transmission identifier, and yy represents the corresponding base station.

In step 1, in order to enable the UE to identify the base station and/or the base station cell that generated the random access response message, the first base station may distinguish the content of the random access response message generated by itself from the content of the random access response message generated by another base station according to the protocol specification. The random access response message content here may be an IE (Information Element) of the random access response message. For example, a protocol may specify: the MeNB and SeNB generated random access response message IEs are completely distinguishable, and vice versa, the MeNB generated random access response message is not generated by the SeNB either. In this way, the UE can identify the base station generating the random access response message according to the specific content of the random access response message.

In step 1, in order to enable the UE to identify the base station and/or the base station cell that generates the random access response message, or to enable the UE to send the feedback information of the random access response message to a specified base station through a specified bearer channel, the first base station may also carry the following indication information in the generated random access response message: indication information of a bearer channel for indicating feedback information of the random access response message, or indication information of a base station and/or base station cell information for indicating feedback information of the random access response message.

The method can also comprise the following steps:

and step 3: the first base station receives feedback information of a random access response message sent by the UE, wherein the feedback information of the random access response message carries indication information and/or a transmission identifier.

The specific meaning of the indication information and/or the transmission identifier carried in the feedback information of the random access response message, and the carrying manner and other related descriptions can be referred to in scheme two.

In another transmission procedure of the random access response message, the method may include:

and 4, step 4: the first base station receives the random access response message or the random access response message generated by the second base station to process the data packet, and forwards the random access response message or the random access response message generated by the second base station to process the data packet.

If the first base station determines that the feedback information of the random access response message needs to be forwarded according to the indication information and/or the transmission identifier carried in the received feedback information of the random access response message, after step 4, the method further includes the following steps:

and 5: and the first base station forwards the feedback information of the received random access response message. Here, the "second base station" needs to be determined according to the indication information and/or the transmission identifier carried in the feedback information of the RRC message.

Scheme II: method for transmitting feedback information of RRC message

Referring to fig. 11, a flow chart of transmission of feedback information of an RRC message according to an embodiment of the present invention is described, where a generation base station of the RRC message is taken as a first base station, where "the first base station" may represent an MeNB or an SeNB, and if the "first base station" represents the MeNB, a "second base station" represents the SeNB; if the "first base station" represents a SeNB, the "second base station" may represent a MeNB and/or other senbs. As shown, the process may include:

step 111: the UE receives an RRC message;

step 113: and the UE sends the feedback information of the RRC message to the first base station generating the RRC message and/or the second base station.

Further, between step 111 and step 113, step 112 may be further included: the UE determines the base station and/or base station cell that generated the RRC message.

In step 111, the procedure for the base station to send the RRC message may be as described in scheme one.

In step 112, the UE may determine the base station and/or the base station cell generating the RRC message according to the information, carried in the RRC message, for identifying the base station and/or the base station cell generating the RRC message; and/or, a base station and/or a base station cell generating the RRC message can be determined according to the content of the RRC message.

As described in the first solution, the base station may distinguish the content of the RRC message generated by the base station from the content of the RRC messages generated by other base stations, and the UE may determine the base station or the cell of the base station that generates the RRC message according to the content of the RRC message, and further determine the uplink channel that transmits the feedback information of the RRC message.

As described in the first solution, the information carried in the RRC message and used for identifying the base station and/or the base station cell that generates the RRC message may be an identifier of the base station and/or the base station cell, or may be a transmission identifier of the RRC message, where the base station or the base station cell has a mapping relationship with the transmission identifier, and therefore the UE may determine the base station or the base station cell that generates the RRC message according to the indication information page. The specific meaning and content and carrying manner of the indication information can refer to the related description in the first scheme, and are not detailed here.

As described in the first scheme, the mapping relationship between the base station or the base station cell and the transmission identifier is sent to the UE after negotiation between the base stations or the base station cells. Correspondingly, the method also comprises a step of receiving the mapping relation information sent by the base station at the UE side. Of course, the mapping relationship information may also be pre-configured on the UE, and the UE may determine the base station or the base station cell that generates the RRC message according to the mapping relationship information pre-configured on the UE and the transmission identifier carried in the received RRC message.

As described in the first scheme, the RRC message may further carry indication information, where the indication information is used to indicate a bearer channel for sending the feedback information of the RRC message, or is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message. The UE may determine, according to the bearer channel indicated by the indication information, an uplink channel for sending the feedback information of the RRC message, or determine, according to the base station or the base station cell that generates the RRC message and indicated by the indication information, the uplink channel for sending the feedback information of the RRC message, or determine, according to the base station or the base station cell that forwards the feedback information of the RRC message and indicated by the indication information, the uplink channel for sending the feedback information of the RRC message.

In step 113, the UE may carry indication information and/or transmission identifier in feedback information of the RRC message.

The transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

The UE may carry the indication information in an SDU or PDU of the PDCP layer corresponding to the feedback information of the RRC message, or in an SDU or PDU of the RLC layer. The indication information may also be carried in an RRC message used to send feedback information of the RRC message.

The indication information carried in the feedback information of the RRC message may indicate whether the receiving base station of the feedback information forwards the feedback information or analyzes the feedback information, if the receiving base station needs to forward the feedback information, the target base station and/or the base station cell to which the feedback information is forwarded may be further indicated, the indication information may also indicate the base station and/or the base station cell that generated the RRC message, and the indication information serves to enable the receiving base station of the feedback information to determine subsequent processing operations after receiving the feedback information. Specifically, the indication information may be used to indicate one of the following:

(1) indicating that a receiving base station and/or a base station cell of the feedback information of the RRC message needs to forward the feedback information of the RRC message;

(2) indicating a receiving base station and/or a base station cell of the feedback information of the RRC message, and needing to analyze the feedback information of the RRC message to an RRC layer;

(3) indicating a receiving base station and/or a base station cell of the feedback information of the RRC message, and forwarding the feedback information of the RRC message to a target base station and/or cell information of the target base station;

(4) indicating the base station and/or base station cell that generated the RRC message.

Further, the indication information may be carried in an SDU (Service Data Unit) or PDU (Protocol Data Unit) of the PDCP layer corresponding to the feedback information of the RRC message, or in an SDU or PDU of the RLC layer. The indication information page may be carried in an RRC message used for transmitting feedback information of the RRC message.

In step 113, the UE may send the feedback information of the RRC message to the first base station through the uplink channel of the bearer channel of the RRC message generated by the first base station, and/or send the feedback information of the RRC message to the second base station through the uplink channel of the bearer channel of the second base station forwarding the RRC message generated by the first base station or the RRC message processing data packet.

The SRB identifier of the first bearer channel of the first base station is the same as or different from the SRB identifier of the second bearer channel of the second base station that forwards the RRC message of the SRB or the RRC message processing data packet. The SRB identifier may be an existing SRB identifier (e.g., SRB0, SRB1, SRB2) or an extended SRB identifier (e.g., SRB 3).

And if the RRC message corresponding to the feedback information of the RRC message is the RRC reconfiguration complete message, the UE sends the RRC reconfiguration complete message to the first base station and the second base station. This process may occur during the process of establishing the SRB bearer, or establishing the DRB bearer, or establishing the tunnel bearer, or establishing the data offloading bearer by the second base station.

In the above procedure of the second scheme, the UE may further send feedback information of the RRC message to the first base station that generates the RRC message, and/or send the feedback information to another base station (a second base station) other than the base station that generates the RRC message, by the following manner: and the UE sends the feedback message of the RRC message to a dedicated bearer channel which is used by the first base station for sending the feedback message of the RRC message, wherein the dedicated bearer channel belongs to the base station generating the RRC message, or does not belong to the base station generating the RRC message, or partially belongs to the base station generating the RRC message.

Further, corresponding to the procedure in the first scheme in which the base station sends the configuration information of the bearer path for transmitting the RRC message to the UE, the second scheme may further include a procedure in which the terminal receives the configuration information of the bearer path for transmitting the RRC message sent by the base station. The process may include: the UE receives configuration information of a bearer channel which is sent by the first base station and used for sending RRC messages and/or RRC message processing data packets. The "first base station" may represent an MeNB or an SeNB. The content of the configuration information of the bearer channel sent by the base station to the UE is substantially the same as the content of the configuration information of the bearer channel transmitted in the process of configuring the bearer channel between the base stations, and reference may be made to the description of the subsequent scheme three.

The second scheme is applicable to all the RRC message transmission structures described above.

As can be seen from the above description of the first scheme, the embodiment of the present invention provides a method for sending feedback information of an RRC message for a scenario in which multiple base stations serve terminals, and according to actual needs, the feedback information of the RRC message may be sent to the base station that generates the RRC message, or sent to other base stations, or forwarded by other base stations to the base station that generates the RRC message. Further, in order to enable the terminal to send the feedback information of the RRC message to the base station that generates the RRC message or to the designated base station, the embodiment of the present invention improves the method for the base station to send the RRC message, and enables the terminal to identify the source of the RRC message by carrying the indication information, so as to determine the bearer channel for sending the feedback information of the RRC message. Further, in order to enable a receiving base station of the feedback information of the RRC message to determine whether the base station performs analysis or needs to forward to another base station, or further determine a target base station to which the feedback information is forwarded, the embodiment of the present invention expands the feedback information of the RRC message, where the feedback information carries indication information, so that the receiving base station can determine whether to forward and the target base station to which the feedback information is forwarded. The above scheme is applicable to various RRC message transmission architectures.

Another message transmission flow of the second scheme may include:

step 1: UE receives a random access response message;

and step 3: and the UE sends the feedback information of the random access response message to the first base station generating the random access response message and/or to the second base station.

Further, between step 1 and step 3, step 2 may be further included: and the UE determines the base station and/or the base station cell generating the random access response message.

In step 1, the process of sending the random access response message by the base station may refer to the description of scheme one.

In step 2, the UE may determine the base station and/or the base station cell that generates the random access response message according to the information, which is carried in the random access response message and used for identifying the base station and/or the base station cell that generates the random access response message; and/or determining the base station and/or the base station cell generating the random access response message according to the content of the random access response message.

As described in the first solution, the base station may distinguish the content of the random access response message generated by the base station from the content of the random access response messages generated by other base stations, and the UE may determine the base station or the base station cell generating the random access response message according to the content of the random access response message, and further determine the uplink channel transmitting the feedback information of the random access response message.

As described in the first solution, the information, which is carried in the random access response message and is used for identifying the base station and/or the base station cell that generates the random access response message, may be an identifier of the base station and/or the base station cell, and may also be a transmission identifier of the random access response message, where the base station or the base station cell has a mapping relationship with the transmission identifier, and therefore the UE may determine the base station or the base station cell that generates the random access response message according to the indication information page. The specific meaning and content and carrying manner of the indication information can refer to the related description in the first scheme, and are not detailed here.

As described in the first scheme, the mapping relationship between the base station or the base station cell and the transmission identifier is sent to the UE after negotiation between the base stations or the base station cells. Correspondingly, the method also comprises a step of receiving the mapping relation information sent by the base station at the UE side. Of course, the mapping relationship information may also be pre-configured on the UE, and the UE may determine the base station or the base station cell that generates the random access response message according to the mapping relationship information pre-configured on the UE and the transmission identifier carried in the received random access response message.

As described in the first scheme, the random access response message may further carry indication information, where the indication information is used to indicate a bearer channel for sending the feedback information of the random access response message, or is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message. The UE may determine, according to the bearer channel indicated by the indication information, an uplink channel for sending the feedback information of the random access response message, or determine, according to the base station or the base station cell indicated by the indication information, which generates the random access response message, the uplink channel for sending the feedback information of the random access response message, or determine, according to the base station or the base station cell indicated by the indication information, which forwards the feedback information of the random access response message, the uplink channel for sending the feedback information of the random access response message.

In step 3, the UE may carry indication information and/or a transmission identifier in feedback information of the random access response message.

The transmission identifier carried in the feedback information of the random access response message is the same as the transmission identifier carried in the random access response message.

The UE may carry the indication information in an SDU or PDU of the PDCP layer corresponding to the feedback information of the random access response message, or in an SDU or PDU of the RLC layer. The indication information may also be carried in a random access response message used for sending feedback information of the random access response message.

The indication information carried in the feedback information of the random access response message may indicate whether a receiving base station of the feedback information forwards the feedback information or analyzes the feedback information, if the receiving base station needs to forward the feedback information, the target base station and/or the base station cell to which the feedback information is forwarded may be further indicated, the indication information may also indicate the base station and/or the base station cell which generates the random access response message, and the indication information serves to enable the receiving base station of the feedback information to determine subsequent processing operations after receiving the feedback information. Specifically, the indication information may be used to indicate one of the following:

(1) indicating a receiving base station and/or a base station cell of the feedback information of the random access response message to forward the feedback information of the random access response message;

(2) indicating a receiving base station and/or a base station cell of the feedback information of the random access response message to analyze the feedback information of the random access response message to an RRC layer;

(3) indicating a receiving base station and/or a base station cell of the feedback information of the random access response message, and forwarding the feedback information of the random access response message to a target base station and/or cell information of the target base station;

(4) indicating the base station and/or the base station cell that generated the random access response message.

Further, the indication information may be carried in an SDU (Service Data Unit) or PDU (Protocol Data Unit) of the PDCP layer corresponding to the feedback information of the random access response message, or in an SDU or PDU of the RLC layer. The indication information page may be carried in a random access response message for transmitting feedback information of the random access response message.

The third scheme is as follows: configuration method of bearing channel

In the prior art, the cells providing bearer services to UEs are subordinate to a base station and are connected by nearly delay-free optical fibers. In this scenario, there is no need to negotiate establishment, modification, and release of bearer channels between cells, and when the UE accesses another cell in the presence of at least one serving cell, the UE accesses the cell first and then establishes a bearer with the cell. In the scenario of the embodiment of the present invention, a backhaul network with a time delay may be between cells, and it is not possible to use one base station or one centralized control network element to effectively control multiple cells in real time. The establishment, modification and release processes of the bearer channel or the channel for sending information need to be negotiated between cells or between base stations to which the cells belong. Meanwhile, because a plurality of cells and the UE can comprise the bearing channel of the RLC layer and/or the PDCP, the UE can firstly acquire the configuration information of the bearing channel and then establish synchronization with the cells. The following detailed description is made with reference to the accompanying drawings.

Referring to fig. 12, a schematic view of a bearer configuration (establishment) procedure provided in an embodiment of the present invention is shown, where the procedure may include:

step 121: the first base station sends an RRC message transmission configuration request message to the second base station, wherein the RRC message transmission configuration request message is used for requesting the second base station to establish a bearer channel for forwarding the RRC message or the RRC message processing data packet generated by the first base station. In specific implementation, the first base station may directly send the RRC message transmission configuration request message to the second base station, or may send the configuration request message of the RRC message bearer channel to the UE, and instruct the UE to send the configuration request message of the RRC message bearer channel to the second base station.

Step 122: and the second base station receives the RRC message transmission configuration request message, and establishes a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the RRC message transmission configuration request message.

Further, the above process may further include:

step 123: and the second base station returns a confirmation message corresponding to the RRC message transmission configuration request message to the first base station.

Further, the above process may further include:

step 124: and the first base station and/or the second base station sends the configuration information of the bearer channel to the UE.

Further, the above process may further include:

step 125: and the UE returns configuration completion information or failure information to the first base station and/or the second base station. The configuration completion information may be RRC reconfiguration completion information for indicating that the configuration of the bearer channel is completed; alternatively, the configuration completion information may be mac ce, which is used to indicate that the configuration of the bearer channel is completed.

Step 123 and step 124 in the above flow have no strict timing requirements.

In step 121, the RRC message transmission configuration request message may be used to request the second base station to establish a bearer channel for forwarding an RRC message or an RRC message processing data packet generated by the first base station signaling radio bearer.

The configuration request message may carry one or a combination of the following information:

the first base station expects the second base station established by the second base station to forward the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet. Specifically, the bearer path configuration information of the RRC message generated by the first base station forwarded by the second base station expected to be established by the second base station may include PDCP layer configuration information of the first base station.

Wherein the configuration information of the bearer channel includes: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

In step 121, the first base station may further carry interface information between the first base station and the second base station in the RRC message transmission configuration request message, where the interface information is interface information of an interface between base stations, on the first base station side, corresponding to a bearer channel through which the second base station forwards the RRC message generated by the first base station or the RRC message processing data packet. The interface information may include one or a combination of: GTP (General Data transfer platform) pipe endpoint information and/or transport layer address information, channel information between the RRC entity unit and the PDCP entity unit (the channel information may include channel identification information and channel configuration information), and channel information between the PDCP entity unit and the RLC entity unit. The second base station may use the interface information as one of the configuration parameters when establishing the bearer path.

In step 123, the second base station may carry interface information between the second base station and the first base station in the acknowledgement message, where the interface is interface information of an interface between base stations, at the second base station side, corresponding to a bearer path through which the second base station forwards the RRC message generated by the first base station or the RRC message processing data packet. The interface information may include one or a combination of: GTP tunnel endpoint information and/or transport layer address information, channel information between the RRC entity unit and the PDCP entity unit, and channel information between the PDCP entity unit and the RLC entity unit. The first base station can configure the bearer channel of the first base station according to the interface information.

In step 123, the acknowledgement request message may further include bearer configuration information of the second station, and/or the second base station forwards the configuration information of the bearer of the RRC message processing data packet or the RRC message generated by the first base station. The configuration information of the bearer channel may include: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

In step 124, the first base station sends configuration information of a bearer for transmitting an RRC message to the UE, where the sent bearer configuration information includes one or a combination of the following:

a first base station sends the configuration information of a bearer channel of an RRC message generated by the first base station;

the first base station transmits the RRC message generated by the second base station or the configuration information of the bearer channel of the RRC message processing data packet;

the second base station sends the configuration information of the bearer channel of the RRC message generated by the second base station;

and the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

The forwarding, by the second base station, the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet may include: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information and physical layer unit information.

In step 122, the step of establishing, by the second base station, a bearer path for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet may include: PDCP entity unit, RLC entity unit, MAC entity unit, physical layer entity unit; alternatively, it comprises: the first base station sends a RRC message generated by the first base station to the second base station, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit provide service for the terminal.

In step 121, further, the first base station may further send indication information to the terminal, where the indication information is used to trigger the terminal to receive or send data using a bearer channel of the first base station and/or the second base station for transmitting an RRC message. The indication information may include: the RRC layer indication information of the first base station, the MAC layer command and the physical layer command are combined.

Further in step 124, after the first base station sends the configuration information of the bearer channel for transmitting the RRC message to the UE, the first base station may receive indication information sent by the terminal to the first base station, and trigger the first base station to start sending and/or receiving data according to the sent configuration information of the bearer channel. Specifically, the first base station receives indication information sent by the terminal and/or indication information of the terminal forwarded by the second base station, and receives or sends data facing the terminal by using a bearer channel used by the first base station and/or the second base station to transmit an RRC message or an RRC message processing data packet.

Further, the first base station or the second base station may further send auxiliary information to the terminal, where the auxiliary information may include a Cell Radio Network Temporary Identifier (C-RNTI) and/or timing advance information for a Cell of the second base station.

Further, before the first base station sends the RRC message transmission configuration request message to the second base station, the method may further include: the second base station sends a first request message to the first base station, wherein the first request message is used for requesting the first base station to send an RRC message transmission configuration request message to the second base station.

The first base station can also initiate a modification process of the bearer channel configuration information.

Referring to fig. 13, a schematic view of a modification process of bearer path configuration information provided in an embodiment of the present invention includes:

step 131: the first base station sends an RRC message transmission configuration modification message to the second base station, wherein the RRC message transmission configuration modification message is used for requesting the second base station to modify a bearer channel of the second base station for forwarding the RRC message or the RRC message processing data packet generated by the first base station, and/or is used for notifying the second base station that the configuration information of the bearer channel of the first base station is modified.

Step 132: and under the condition that the RRC message transmission configuration modification message is used for requesting the second base station to modify the bearer channel of the second base station for forwarding the RRC message generated by the first base station or the RRC message processing data packet, the second base station modifies the bearer channel of the second base station for forwarding the RRC message generated by the first base station or the RRC message processing data packet according to the RRC message transmission configuration modification message.

Further, the above process may further include:

step 133: and the second base station returns a confirmation message corresponding to the RRC message transmission configuration modification message to the first base station.

Further, the above process may further include:

step 134: and the first base station and/or the second base station sends the modified configuration information of the bearer channel to the UE.

Further, the above process may further include:

step 135: and the UE returns configuration completion information or failure information to the first base station and/or the second base station. The configuration completion information may be RRC reconfiguration completion information for indicating completion of modification of the bearer channel; alternatively, the configuration completion information may be mac ce, which is used to indicate that the modification of the bearer channel is completed.

In step 131, the configuration modification message carries configuration information of a bearer channel that the first base station desires to modify by the second base station, and the configuration information of the bearer channel that the first base station desires to modify by the second base station may include: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

In step 131, the configuration modification message is used to notify the second base station that the configuration information of the bearer channel of the first base station is modified, and the configuration modification message may carry the configuration information of the bearer channel modified by the first base station. Specifically, the configuration information of the bearer channel modified by the first base station, which is carried in the configuration modification message, may include: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

In step 133, the acknowledgement message returned by the second base station may include: and the second base station modified by the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

In step 134, the first base station may send the modified configuration information of the bearer channel, which is generated by the second base station and used by the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, to the terminal.

Further, before step 131, the method may further include: and the second base station sends a second request message to the first base station, wherein the second request message is used for requesting the first base station to send a configuration modification message of an RRC message transmission channel to the second base station.

The first base station may also initiate a procedure of bearer release.

Referring to fig. 14, a schematic flow chart of bearer release provided in the embodiment of the present invention includes:

step 141: the first base station sends an RRC message transmission configuration release message to the second base station, wherein the RRC message transmission configuration release message is used for requesting the second base station to release a bearer channel for the second base station to forward the RRC message generated by the first base station or an RRC message processing data packet, and/or is used for informing the second base station that the first base station releases the bearer channel for sending the RRC message.

Step 142: and under the condition that the RRC message bearer channel release message is used for solving the second base station to release the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, the second base station releases the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the RRC message transmission configuration release message.

Further, the above process may further include:

step 143: and the second base station returns a confirmation message corresponding to the RRC message transmission configuration release message to the first base station.

Further, the above process may further include:

step 144: and the first base station and/or the second base station informs the UE of the release condition of the bearer channel.

Further, the above process may further include:

step 145: and the UE returns bearer channel configuration completion information or failure information to the first base station and/or the second base station. The configuration completion information is RRC reconfiguration completion information and is used for indicating that the first base station and/or the second base station completes the release of the bearing channel for sending the RRC message; or, the configuration completion information is MACCE, and is used to indicate that the first base station and/or the second base station completes the release of the bearer tunnel for sending the RRC message.

In step 144, the first base station may send an RRC message transmission configuration release message to the UE, where the release message is used to request the terminal to release a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet.

The above process may further include: the first base station releases the first base station, and the second base station forwards the RRC message generated by the first base station or a bearer channel of the RRC message processing data packet, such as PDCP entity unit configuration information.

The specific implementation of the second base station initiating the bearer channel configuration procedure, or initiating the bearer channel modification procedure, or initiating the bearer channel release procedure may refer to the above corresponding procedure, and is not described in detail herein.

The third scheme is applicable to all the aforementioned RRC message transmission structures.

In a third aspect, the configuration information of the bearer channel sent by the first base station and/or the second base station to the UE may include: and the first base station and/or the second base station are used for sending RRC messages and/or configuration information of bearer channels of RRC message processing data packets. Specifically, the content of the configuration information of the bearer channel may include one or a combination of the following: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, PHY entity unit information, channel information of the physical layer.

Further, the first base station and/or the second base station may send, to the terminal, indication information corresponding to the configuration information of the bearer channel, and preferably, the indication information may be carried in the configuration information of the bearer channel and sent. The indication information may be used to indicate a generating base station or a base station cell of the RRC message sent by the bearer channel, or to indicate a type of the generating base station or the base station cell of the RRC message sent by the bearer channel and the RRC message, or to indicate a type of the RRC message sent by the bearer channel. The content of the indication information may include one of: SRB identification information corresponding to the bearer channel, identification information of the base station or the base station cell, and identification information of the logical channel.

The type of the RRC message may indicate that the RRC message is a mobility management related message type, or a type of an RRC message related to a MAC layer and a physical layer of a base station of a specified type, or a mobility management related message type of a base station of a specified type. A specific type of RRC message, generated only by a specific base station. Further, the type of the RRC message related to the MAC layer and the physical layer may not include the power control related RRC message. )

Further, the first base station and/or the second base station may further send one or a combination of the following mapping relationship information to the UE, where the "indication information" in the mapping relationship information is the indication information corresponding to the configuration information of the bearer channel, and the mapping relationship information may include:

(1) the mapping relation information of the indication information and a base station or a base station cell, wherein the base station or the base station cell is a generation base station or a base station cell of an RRC message sent on a bearing channel corresponding to the indication information;

(2) the mapping relation information of the indication information and the base station or the base station cell and the type of the RRC message, wherein the base station or the base station cell refers to a generation base station or a base station cell of the RRC message sent on a bearing channel corresponding to the indication information;

(3) and the indication information is the mapping relation information of the type of the RRC message sent on the bearer channel corresponding to the indication information.

Further, the SRB of the signaling radio bearer may be an existing SRB (SRB0, SRB1 or SRB2) or an extended SRB, which is represented as SRBN (N is a natural number greater than 2), such as SRB 3. One preferred expression is SRBxx-yy, xx representing the base station and or base station cell information that transmitted the RRC message that generated the SRB, and yy representing the identity of the corresponding SRB. Of course, the meanings of xx and yy can be interchanged.

Further, the identification information of the bearer path may be an SRB identification, or may be a new type of bearer identification defined in the embodiment of the present invention.

Further, the logical channel identifier used by the SRB or the bearer channel may be an existing logical channel identifier (logical channel 0 or logical channel 1), or may be an extended logical channel identifier, where the extended logical channel identifier is a logical channel identifier other than 0 and 1, such as logical channel 2.

Further, the configuration information of the bearer path may include an SRB bearer identifier and configuration information of a plurality of corresponding bearer paths. The SRB carries a base station and/or a base station cell to which the PDCP layer of the Nth bearer channel or the Mth bearer channel in the corresponding plurality of bearer channels belongs, and indicates information of the base station and/or the base station cell generated by the RRC message identified by the SRB. Preferably, both M and N are 1. For example, the configuration information of the bearer channel may include the following configuration information:

SRB1(MeNB, PDCP, etc., SeNB PDCP, etc., MeNB PDCP + SeNB RLC, etc.)

Then the first bearer ("MeNB, PDCP, etc") or the base station (MeNB) to which the PDCP of the first bearer belongs is the generating base station for the RRC message identified by SRB 1. In this way, the base station for generating the RRC message identified by the SRC can be indicated when the SRB corresponds to multiple bearer channels.

Further, the configuration information of the bearer channel may include configuration information of a plurality of bearer channels. In the configuration information of the multiple bearer channels, the SRB identifier is the same as the bearer identifier of the nth bearer channel in the multiple bearer channels identified by the SRB identifier, and/or the information of the generation base station and/or the base station cell of the RRC message identified by the SRB identifier is the same as the base station and/or the base station cell to which the mth bearer channel belongs. Preferably, M and N have the same value and may both have a value of 1. For convenience of description, the bearer is referred to as a combined bearer in the following examples, for example, the configuration information of the combined bearer may include the following configuration information:

(MeNB SRB1，SeNB SRB3)

the configuration information of the combined bearer channel includes configuration information of two bearer channels: an MeNB SRB1 and an SeNB SRB3, the SRB1 of the combined bearer channel may be the same as the bearer identifier of the first bearer channel "MeNB SRB 1", or/and a generation base station and/or a base station cell of the RRC message identified by the SRB1 of the combined bearer channel may be the same as a base station and/or a base station cell "MeNB" to which the first bearer channel "MeNB SRB 1" belongs. That is, according to the above rule, the SRB id of the combined bearer channel or the type of the RRC message transmitted by the combined bearer channel may be determined according to the configuration information of the combined bearer channel.

The specific content of the bearer path configuration information sent by the base station to the terminal is also applicable to the first and second schemes.

In the third scheme, the related processing operation at the terminal side may include: a terminal receives configuration information of a bearer channel sent by a base station, wherein the bearer channel comprises one or a combination of the following configuration information:

the first base station forwards the configuration information of the bearing channel of the RRC message or the RRC message data packet generated by the second base station;

and the second base station forwards the configuration information of the bearer channel of the RRC message or the RRC message data packet generated by the first base station.

Further, after receiving the configuration information of the bearer channel sent by the base station, the terminal may also receive and/or send data from the corresponding bearer channel according to the received configuration information of the bearer channel; or, after accessing the base station by using the random access process, receiving and/or sending data from the corresponding bearer channel according to the configuration information of the bearer channel configured in advance for transmitting the RRC message. Specifically, the process of the terminal receiving the RRC message from the corresponding bearer channel according to the received configuration information of the bearer channel may include: the terminal receives the indication information sent by the base station, establishes a bearer channel by using the received configuration information of the bearer channel according to the indication information, and receives or sends data from the corresponding bearer channel. Wherein the indication information may include: a combination of one or more of RRC layer indication information, MAC CE, physical layer commands of the base station. Further, the indication information may be sent through RRC dedicated signaling.

Optionally, the process of the terminal receiving the RRC message from the corresponding bearer channel according to the received configuration information of the bearer channel includes: the terminal sends indication information to a base station, triggers the base station receiving the indication information to start sending and or receiving data according to the sent configuration information of the bearer channel, and further, the base station forwards the data by using another base station (the base station and the another base station refer to the first base station and the second base station, or the second base station and the first base station). Further, the terminal receives and/or sends data from the corresponding bearer channel according to the indication information by using the bearer channel corresponding to the received configuration information of the bearer channel. Wherein, the indication information is an RRC message, or a mac ce, or a physical layer command, or a measurement report.

The indication information is an RRC message, specifically, a dedicated RRC message for triggering the base station to send and/or receive data in the bearer channel, or a measurement report. The measurement report may carry dedicated measurement information that triggers the base station to send and/or receive data in the bearer channel. Optionally, the base station configures a measurement event in advance for triggering the base station to send and/or receive data in the bearer channel, and after the terminal detects that the measurement result meets the measurement event reporting condition, the terminal sends a measurement report based on the measurement event to the base station, triggers the base station to send and/or receive data in the bearer channel, and/or prompts the base station that the terminal is ready to receive and/or send data in the bearer channel.

Considering that the transmission delay of the RRC message is relatively large, the indication information may also be transmitted to the base station by using a mac ce and/or physical layer command. When the terminal transmits the indication information in this manner, the base station can quickly parse the information.

Of course, the indication information may be at least one and/or a combination of an RRC message, or a mac ce, or a physical layer command.

The terminal may send the indication information to the cell of the first base station. Optionally, the terminal may send the indication information to the cell of the second base station, and at this time, if the second base station receives the indication information, the terminal may forward the meaning of the indication information to the first base station, and trigger the first base station to send data to the second base station.

Optionally, the indication information of the UE may be sent to the first base station (or a cell of the first base station), or may be sent to the second base station (or a cell of the second base station). The two transmissions may not be in sequence. And after receiving the information, the first base station sends data to the second base station, and the second base station receives the data of the first base station and forwards the data to the UE.

Further, on the basis of the processing procedure at the terminal side, the terminal may further receive auxiliary information sent by the base station, where the auxiliary information includes a C-RNTI assigned to the terminal by the base station for the second base station cell.

Further, on the basis of the processing flow at the terminal side, the method may further include: and the terminal receives the modified configuration information of the bearer channel for transmitting the RRC message or the RRC message data packet, which is sent by the base station.

Further, on the basis of the processing flow at the terminal side, the method may further include: and the terminal receives a release message of the RRC message bearer channel sent by the base station, and releases the corresponding bearer channel for transmitting the RRC message or the RRC message data packet according to the release message.

Further, on the basis of the processing procedure at the terminal side, the configuration information of the bearer channel may include: the signaling carries at least one parameter configuration information of identification information, PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information and physical layer unit information. Further, the configuration information of the bearer channel may further include: at least one parameter configuration information of network node information of PDCP entity unit, network node information of RLC entity unit, network node information of MAC entity unit, and network node information of Physical layer unit, wherein the network node information may be at least one of identification information of network node, frequency information of network node, PCI (Physical Cell Identity), ecgi (eci Cell Global Identity) information; or, the configuration information of the bearer channel may further include: the PDCP entity unit, the RLC entity unit, the MAC entity unit and the first network node information of the physical layer unit belong to the same, and/or the second network node information of the RLC entity unit, the MAC entity unit and the second network node information of the physical layer unit belong to the same.

It can be seen from the description of the third scheme that the base stations implement management of the bearer channel for transmitting the RRC message through the above interaction process, which may include establishment of the bearer channel, modification of the bearer channel, and release of the bearer channel, and in particular implement management configuration of the signaling radio bearer channel across the base stations. The bearing channel established by the method can realize the cross-base station forwarding of the RRC message and/or the cross-base station forwarding of the feedback information of the RRC message. The above scheme is applicable to various RRC message transmission architectures.

And the scheme is as follows: control plane data packet forwarding method

In the prior art, when one base station forwards a control plane data packet (such as an RRC message or an RRC message processing data packet) for another base station, the control plane data packet is often transparently transmitted. For example, when the second base station forwards the RRC message generated by the first base station, the second base station may not know the specific content of the RRC message, which may cause the second base station to delay the transmission of the RRC message according to its own scheduling condition.

In order to improve sending efficiency, in the embodiment of the present invention, when forwarding the control plane packet, the first base station may further send indication information corresponding to the control plane packet when sending the control plane packet that needs to be forwarded by the second base station to the second base station. The indication information may be used to indicate information such as a transmission priority of the corresponding control plane data packet and/or a processing operation of the second base station, and the second base station may forward the corresponding control plane data packet according to the indication information.

Referring to fig. 15, a schematic diagram of a forwarding flow of a control plane packet according to an embodiment of the present invention is provided. The "first base station" in the flow may represent an MeNB or an SeNB, and if the "first base station" represents an MeNB, the "second base station" represents an SeNB; if the "first base station" represents a SeNB, the "second base station" may represent a MeNB and/or other senbs. The process may include:

step 151: and the first base station sends the control plane data packet and the indication information to the second base station, so that the second base station sends the control plane data packet and/or the scheduling information of the second base station according to the indication information.

Step 152: and after receiving the control plane data packet, the second base station sends the control plane data packet and/or scheduling information of the second base station according to the corresponding indication information.

In step 151, the first base station may transmit the indication information corresponding to the control plane packet before transmitting the control plane packet, or may transmit the indication information corresponding to the control plane packet after transmitting the control plane packet, or may transmit the indication information simultaneously with the control plane packet.

The indication information may include one or a combination of:

time information of the control plane packet; wherein, the time information comprises at least one of time emergency degree, maximum tolerant time delay and the like;

the importance of the control plane packet;

classification information of the control plane packet;

class information of the control plane packet;

the base station which forwards the control plane data packet processes the control plane data packet; wherein different processing information may represent different forwarding strategies.

The second base station and/or the second base station cell is/are used for deactivating the terminal;

connection release information of the second base station and/or the second base station cell for the terminal;

the second base station and/or the second base station cell connection release information for a data radio bearer and/or a signalling radio bearer of the terminal.

The basis for the control plane packet classification may include: the protocol layer to which the control plane data packet belongs comprises: RRC layer messages, PDCP layer messages, RLC layer messages, MAC layer messages, physical layer messages. The control plane packet classification may also be based on: mobility management related information, physical layer radio resource configuration information, NAS (Non-Access Stratum) information, or a handover base station, etc.

The classification information of the control plane data packet is used to indicate that the information corresponding to the control plane data packet (i.e., the control information in the control plane data packet) is a mobility management related message, or physical layer radio resource configuration information, or NAC layer information, or a message for switching the second base station. The classification information of the control plane packet may also be used to instruct the second base station to perform corresponding scheduling and transmission processing. And/or, the classification information of the control plane data packet may indicate which type of information (such as the above-mentioned mobility management related message, or physical layer radio resource configuration information, etc.) the information corresponding to the control plane data packet belongs to, or may indicate that the base station for forwarding the control plane data packet performs corresponding scheduling and transmission processing.

In step 152, when the second base station forwards the control plane data packet, if the time urgency level of the control plane data packet indicated by the corresponding indication information is higher, or the importance of the control plane data packet is higher, or the level of the control plane data packet is higher, the second base station performs priority scheduling and transmission on the control plane data packet. In specific implementation, the threshold of the emergency parameter, or the threshold of the importance parameter, or the threshold of the level parameter corresponding to the control plane packet that needs to be scheduled and transmitted with priority may be set according to actual needs. The second base station may compare a parameter value in the indication information corresponding to the control packet to be forwarded with a threshold value of a corresponding parameter, to determine a scheduling and sending policy to be applied to the control packet.

In specific implementation, the corresponding relationship between the classification information of the control plane data packet and the forwarding policy of the control plane data packet may be preset as needed. In this way, in step 152, when the second base station forwards the control plane packet, the second base station may schedule and transmit the control plane packet by using a corresponding forwarding policy according to the type of the control plane packet indicated by the corresponding indication information. When the second base station forwards the control plane data packet, the second base station may also operate the control plane data packet to perform scheduling and sending by using corresponding scheduling and sending processing according to the forwarding policy of the control plane data packet indicated by the corresponding indication information.

When the second base station forwards the control plane packet in step 152, the second base station may schedule and transmit the control plane packet according to the processing information of the control plane packet indicated by the corresponding indication information.

The control plane packet in the above process may include: RRC message or a data packet of the RRC message after being processed by the RRC entity unit, the PDCP entity unit, the RLC entity unit, or the MAC entity unit. The control plane data packet in the above procedure may also be other types of control messages or data packets processed by the control message through the RRC entity unit, the PDCP entity unit, the RLC entity unit, or the MAC entity unit.

A specific example of the application of the above control plane packet forwarding method is: when the first base station decides to switch the UE away from the second base station, the handover command and corresponding indication information may be sent to the second base station, where the indication information indicates that the handover command is of a higher urgency, a higher importance, belongs to mobility information, and is of a first class (higher level), or notifies the second base station to immediately send the message (stop sending reconfiguration information of the second base station itself). In this way, after receiving the handover command, the second base station may send the handover command to the UE as soon as possible according to the corresponding indication information, and further, considering that the subsequent UE will be handed over to another base station, stop sending the information of the control plane or the data plane to the UE.

When the second base station has control data packet to be forwarded by the first base station, the similar processing flow to the above-mentioned flow can also be adopted.

The method for controlling data packet forwarding provided by the fourth scheme can be applied to the first scheme, the second scheme or the third scheme.

As can be seen from the description of the fourth aspect, when the first base station needs to forward the control plane packet through the second base station, in addition to sending the control packet that needs to be forwarded to the second base station, the first base station also sends indication information corresponding to the control packet to the second base station, where the indication information is used to instruct the second base station to schedule and send the control plane packet, so that forwarding of the control packet is controlled to a certain extent. Especially, in the scheme introducing interaction among base stations in the first scheme, the second scheme or the third scheme, the forwarding base station can forward the message or the processing data packet required to be forwarded in time by giving the appointed description on how to forward the RRC message or the processing data packet of the RRC message or how to forward the feedback information of the RRC message.

In order to illustrate the present invention more clearly, the following describes the implementation of the above-mentioned scheme of the present invention by using a plurality of specific examples.

Example one

The embodiment describes a specific implementation process of the first scheme and the second scheme in the case of adopting the transmission architecture 1.

Referring to fig. 5, the MeNB may transmit RRC messages or RRC message processing packets generated by the MeNB to the UE through DL-1 and/or DL-2.

The process that the MeNB sends the RRC message generated by the MeNB through DL-1 comprises the following steps: and the RRC entity unit of the MeNB generates an RRC message processing data packet and submits the RRC message processing data packet to the PDCP entity unit on the MeNB, the PDCP entity unit sequentially passes through the RLC entity unit, the MAC entity unit and the PHY entity unit on the MeNB after processing is completed, and the RRC message processing data packet is packaged into an RRC message and is sent to the UE.

The process that the MeNB sends the RRC message generated by the MeNB through DL-2 comprises the following steps: and the RRC entity unit of the MeNB generates an RRC message processing data packet and sends the RRC message processing data packet to the PDCP entity unit on the SeNB, after the upper PDCP entity unit of the SeNB finishes processing, the data packet sequentially passes through the RLC entity unit, the MAC entity unit and the PHY entity unit on the SeNB, and the RRC message processing data packet is packaged into an RRC message and sent to the UE.

The IE in the RRC message processing data packet generated by the RRC entity unit of the MeNB may be distinguished from the RRC message generated by the SeNB or the IE in the RRC message processing data packet, or the RRC message processing data packet carries information for identifying the base station and/or the base station cell that generated the RRC message.

After receiving the RRC message, the UE determines that the RRC message is generated by the MeNB, and then transmits the RRC message after processing by a group of PDCP entity unit, RLC entity unit, MAC entity unit, and PHY entity unit corresponding to the MeNB, and/or transmits the RRC message after processing by a group of PDCP entity unit, RLC entity unit, MAC entity unit, and PHY entity unit corresponding to the SeNB. The feedback information of the RRC message carries indication information indicating that the base station generating the RRC message is the MeNB.

After receiving the feedback information of the RRC message, the PDCP entity unit of the MeNB determines that the RRC message is generated by the base station according to the indication information carried in the feedback information, and submits the feedback information of the RRC message to the RRC entity unit of the MeNB for analysis. After receiving the feedback information of the RRC message, the PDCP entity unit of the SeNB determines that the RRC message is generated by the MeNB according to the indication information carried in the feedback information, and then sends the feedback information of the RRC message to the RRC entity unit of the MeNB.

The above-mentioned bearer channels for sending the feedback information of the RRC message are shown as UL-1 and UL-2 in fig. 5. Wherein, UL-1 is the uplink channel corresponding to DL-1, and UL-2 is the uplink channel corresponding to DL-2.

Of course, when the UE sends the feedback information of the RRC message after processing the feedback information through a group of PDCP entity unit, RLC entity unit, MAC entity unit, and PHY entity unit corresponding to the SeNB, the UE may also carry indication information in the feedback information of the RRC message, indicating that the SeNB analyzes the feedback information of the RRC message. In this way, after receiving the feedback information of the RRC message, the PDCP entity unit of the SeNB determines that the base station analyzes the feedback information according to the indication information carried in the feedback information, and then sends the feedback information of the RRC message to the RRC entity unit of the SeNB.

Similarly, the principle of the sending process of the RRC message or the RRC message data packet generated by the SeNB and the sending process of the feedback information of the RRC message are the same as described above, and are not described herein again.

In the process of sending the feedback information of the RRC message, the UE may send the feedback information after processing by a group of entity units corresponding to the generating base station of the RRC message, and/or may send the feedback information after processing by a group of entity units corresponding to other base stations. Specifically, the UE may select the uplink channel for sending the feedback information of the RRC message according to the configuration or protocol specification of the network side, or may select the uplink channel for sending the feedback information of the RRC message by itself. For example, the network side may configure the following policies to the terminal: and if the base station generating the RRC message is the MeNB, selecting a group of entity units corresponding to the SeNB to process and then transmit the entity units, so that the feedback information of the RRC message is transmitted to the MeNB through an uplink channel of a bearer channel for transmitting the RRC message generated by the MeNB by the SeNB.

Example two

The embodiment describes a specific implementation process of the first scheme and the second scheme in the case of adopting the transmission architecture 2.

Referring to fig. 6, the MeNB may transmit RRC messages or RRC message processing packets generated by the MeNB to the UE through DL-1 and/or DL-2.

Since the UE side uses different bearer channels for the MeNB to send the RRC message generated by the MeNB itself and forward the RRC message generated by the SeNB or the RRC message processing packet, the SeNB sends the RRC message generated by the SeNB itself and forward the RRC message generated by the MeNB or the RRC message processing packet, and uses different bearer channels, for the UE, the base station that generates the RRC message can be determined according to a group of entity units that receive the RRC message or according to the bearer channel that sends the RRC message. Therefore, when the UE sends the feedback information of the RRC message, the UE may send the feedback information of the RRC message to the base station that generates the RRC message through the uplink channel of the bearer channel that sends the RRC message.

Specifically, as shown in fig. 6, after receiving the RRC message from DL-1, the UE sends the feedback information of the RRC message to the MeNB through the uplink channel UL-1 corresponding to DL-1. After receiving the RRC message from DL-2, the UE sends the feedback information of the RRC message to the MeNB through the SeNB through the uplink channel UL-2 corresponding to DL-2.

It should be noted that, the process of generating the RRC message by the base station may also be performed with reference to the first example, that is, an IE in an RRC message processing data packet generated by the RRC entity unit of the MeNB is distinguishable from an RRC message generated by the SeNB or an IE in the RRC message processing data packet, or the RRC message processing data packet carries information for identifying a base station and/or a base station cell that generates the RRC message. Correspondingly, the UE may also determine the base station that generates the RRC message in the manner of example one. After receiving the RRC message, the UE may also send feedback information of the RRC message in a manner described in example one, and will not be described in detail here.

EXAMPLE III

The embodiment describes a specific implementation process of the first scheme and the second scheme in the case of adopting the transmission architecture 3.

Referring to fig. 7, the MeNB may transmit RRC messages or RRC message processing packets generated by the MeNB to the UE through DL-1 and/or DL-2.

The process that the MeNB sends the RRC message generated by the MeNB through DL-2 comprises the following steps: the RRC entity unit of the MeNB generates an RRC message processing data packet and sends the RRC message processing data packet to the PDCP entity unit on the MeNB, the upper PDCP entity unit of the MeNB sends the RRC message processing data packet to the RLC entity unit on the SeNB, after the RLC entity unit on the SeNB finishes processing, the data packet sequentially passes through the MAC entity unit and the PHY entity unit on the SeNB, and the RRC message processing data packet is packaged into an RRC message and sent to the UE.

The principle of sending the feedback information of the RRC message by the UE is as follows: from which PDCP entity unit the UE obtains the RRC message, a feedback message of the RRC message is transmitted to the corresponding PDCP entity unit.

As shown in fig. 7, based on the principle, the process of sending the RRC message by the UE may include: after the UE receives the RRC message, since the RRC message is from the PDCP entity unit of the MeNB, the UE sends feedback information of the RRC message to the PDCP entity unit of the MeNB through UL-1 or UL-2.

In a specific implementation, when configuring an SRB bearer or a channel for sending an RRC message to the UE, the base station may notify the UE of a source base station of the bearer or the RRC message sent by the channel (i.e., a base station that generates the RRC message). Thus, the UE can determine the source of the RRC message in the following manner:

mode 1: after receiving the RRC message, a PDCP entity unit of the UE carries indication information when submitting SDU to the RRC entity, wherein the indication information indicates a base station generating the RRC message;

mode 2: after the UE receives the RRC message, the PDCP entity of the UE carries the identification information of the PDCP entity unit when submitting the SDU to the RRC entity, or carries the channel ID from the PDCP entity unit to the RRC entity unit. In this way, the UE can respectively identify the source of SDUs of the PDCP layer of the received RRC message (i.e., the base station that generated the RRC message).

Further, if one base station can recognize that the base station erroneously receives feedback information of RRC messages of other base stations, the UE may be notified of the situation, and further, the erroneously received RRC message may be sent to another base station.

Example four

The embodiment describes a specific implementation process of the first scheme and the second scheme in the case of adopting the transmission architecture 4 and the transmission architecture 5.

Referring to fig. 8 or 9, the MeNB may transmit RRC messages or RRC message processing packets generated by the MeNB to the UE through DL-1 and/or DL-2. In the transmission architecture, only one base station generates the RRC message, so that the problem that the UE needs to distinguish which base station generates the RRC message does not exist, and the base station does not need to carry information for identifying the base station and/or the base station cell generating the RRC message in the RRC message when generating the RRC message, and the MeNB and the SeNB do not need to distinguish the RRC message by means of different IEs.

When the UE sends the feedback information of the RRC message, the feedback information of the RRC message may be sent to the MeNB through UL-1, or may be sent to the MeNB through the SeNB through UL-2.

In a preferred scheme, for the mobility procedure, to ensure fast handover, the MeNB may quickly send an RRC message to the UE using the MAC CE of the SeNB. For example, when the MeNB decides to initiate handover of the UE to the SeNB, an RRC message (handover command) may be sent to the SeNB and instruct the SeNB to send the RRC message (handover command) to the UE using the MAC CE.

EXAMPLE five

This embodiment describes a specific implementation procedure of the third embodiment. The procedure is described by taking as an example that the MeNB initiates the establishment of a signaling radio bearer that forwards RRC messages or RRC message handling packets across the base stations.

SRB1 in this embodiment is an example of an SRB identifier. The establishment, modification and release of the signaling radio bearer in the embodiment of the present invention are not limited to the signaling bearer of SRB1, and may be signaling bearers identified by other SRBs.

Referring to fig. 16, a signaling flowchart of a bearer configuration procedure provided in an embodiment of the present invention is shown, where the procedure may include:

step 161: the MeNB sends an RRC message transmission configuration request message to the SeNB, which is used to request to establish a signaling radio bearer channel of the SRB1, that is, the SeNB is requested to establish a bearer channel for forwarding an RRC message or an RRC message processing packet generated by the MeNB. The RRC message transmission configuration request message carries an SRB1 establishment request for requesting configuration of an RLC entity unit, an MAC entity unit, and a PHY entity unit on the SeNB.

Step 162: and the SeNB transmits the configuration request message according to the RRC message, configures the RLC entity unit, the MAC entity unit and the PHY entity unit of the SRB1 on the SeNB, and returns a confirmation message to the MeNB after the configuration is completed. The confirmation message includes information of one or more entity units configured by the SeNB for the SRB 1: RLC entity unit, MAC entity unit, PHY entity unit.

Step 163: after receiving the confirmation message, the MeNB configures the PDCP entity unit on the MeNB for the SRB1, and sends configuration information of the SRB1 to the UE. The configuration information of the SRB1 may include: PDCP entity unit information of SRB1 on MeNB, and one or a combination of RLC entity unit information, MAC entity unit information, PHY entity unit information of SRB1 on SeNB.

Step 164: the UE performs bearer establishment according to the received configuration information of the SRB1, that is, configures the PDCP entity unit, the RLC entity unit, the MAC entity unit, and the PHY entity unit of the SRB1 on the UE, and returns bearer configuration completion information to the MeNB.

Step 165: the MeNB sends bearer configuration completion information to the SeNB to inform the SeNB to establish a signaling radio bearer path that completes the SRB 1.

The entire signaling radio bearer path of SRB1 may include PDCP entity units on MeNB, RLC entity units, MAC entity units, PHY entity units on SeNB, and PHY entity units, MAC entity units, RLC entity units, PDCP entity units on UE. Through the radio signaling bearer, the RRC message or RRC message packet generated by the MeNB may be transmitted to the UE through the SeNB.

EXAMPLE six

This embodiment describes a specific implementation procedure of the third embodiment. The procedure is described as a modification of MeNB initiated signaling radio bearer tunneling of RRC message forwarding or RRC message handling packets across base stations.

Referring to fig. 17, a signaling flow diagram of a bearer modification procedure provided in the present invention, taking the bearer established in fig. 16 as an example, as shown in the figure, the flow may include:

step 171: the MeNB sends an RRC message transmission configuration modification message to the SeNB to request the SeNB to modify a signaling radio bearer channel of SRB1, that is, to request the SeNB to modify a bearer channel established for forwarding an RRC message generated by the MeNB or an RRC message processing packet. The request message carries configuration information of the radio signaling bearer of the SRB1 desired to be modified on the SeNB, which may include one or a combination of an RLC entity unit, a MAC entity unit, and a PHY entity unit on the SeNB.

Step 172: the SeNB transmits a configuration modification message according to the RRC message, modifies configuration information of a radio signaling bearer channel of the SRB1 on the SeNB, such as one or a combination of RLC entity unit information, MAC entity unit information, and PHY entity unit information of the SRB1 on the SeNB, and returns an acknowledgement message to the MeNB. Further, the configuration information of the radio signaling bearer of the SeNB modified SRB1 on the SeNB may be carried in the acknowledgement message.

Step 173: the MeNB sends a notification message to the UE after receiving the confirmation message to notify the SRB1 that the radio signaling bearer has been modified. Further, the notification message may carry signaling radio bearer configuration information of the SRB1, and the configuration information of the SRB1 may include: PDCP entity unit information of SRB1 on MeNB, and one or a combination of RLC entity unit information, MAC entity unit information, PHY entity unit information of SRB1 on SeNB.

Step 174: and the UE returns the bearer configuration completion information to the MeNB.

Step 175: the MeNB sends bearer configuration completion information to the SeNB to inform the SeNB to establish a signaling radio bearer path that completes the SRB 1.

EXAMPLE seven

This embodiment describes a specific implementation procedure of the third embodiment. The procedure is described by taking the example that the MeNB initiates the release of the signaling radio bearer channel for forwarding the RRC message or processing the data packet with the RRC message across the base station.

Referring to fig. 18, a signaling flow diagram of a bearer release procedure provided in this embodiment of the present invention, taking the bearer established in fig. 16 as an example, as shown in the figure, the flow may include:

step 181: the MeNB sends an RRC message transmission configuration release message to the SeNB to request the SeNB to release the signaling radio bearer channel of the SRB1, that is, to request the SeNB to release the bearer channel established for forwarding the RRC message generated by the MeNB or the RRC message processing packet. The request message carries configuration information of the radio signaling bearer of the SRB1 desired to be released on the SeNB, which may include one or a combination of RLC entity units and MAC entity units on the SeNB.

Step 182: the SeNB transmits a configuration release message according to the RRC message, releases the configuration information of the radio signaling bearer of the SRB1 on the SeNB, which may include the RLC entity unit and the MAC entity unit of the SRB1 on the SeNB, and returns an acknowledgement message to the MeNB.

Step 183: and after receiving the confirmation message, the MeNB releases the configuration information of the radio signaling bearer channel of the SRB1 on the SeNB, namely releases the PDCP entity unit of the SRB1 on the MeNB. The MeNB sends a notification message to the UE to notify the SRB1 that the radio signaling bearer has been released.

Step 184: after the UE receives the notification, the UE releases the configuration information of the radio signaling bearer channel of the SRB1 on the UE, including the PDCP entity unit, the RLC entity unit, and the MAC entity unit.

Step 185: the MeNB sends bearer configuration completion information to the SeNB to inform the SeNB to release the signaling radio bearer path of the completion SRB 1.

Based on the same technical concept, the embodiment of the invention also provides the base station applicable to the scheme one.

Referring to fig. 19A, a schematic diagram of a base station applicable to scheme one is shown, where the base station may be an MeNB or an SeNB. As shown, the base station may include: transceiver 1910 processor 1911 where the components may perform the corresponding processes in scenario one. As shown in the figure:

a processor 1911 configured to generate an RRC message;

a transceiver 1910 for transmitting the RRC message generated by the processor to a terminal; and/or sending the RRC message or the RRC message processing data packet to a terminal through a second base station, wherein the number of the second base stations is one or more.

The processor 1911 may generate a first base station generation reception random access response message; the transceiver 1910 may transmit the random access response message generated by the processor 1911 to the terminal and/or transmit the random access response message or the random access response message processing packet to the terminal through the second base station, where the number of the second base stations is one or more.

The random access response message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

The RRC message carries information for identifying a base station and/or a base station cell generating the RRC message.

The information for identifying the base station and/or the base station cell generating the RRC message is an identifier of the base station and/or the base station cell; or, the information for identifying the base station and/or the base station cell generating the RRC message is a transmission identifier of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

The RRC message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the RRC message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message.

The transceiver 1910 may transmit the RRC message to the terminal through a downlink channel of a first bearer channel that transmits the RRC message generated by the processor; and/or sending the RRC message or the RRC message processing packet generated by the processor 1911 to the second base station, and forwarding the received RRC message or the RRC message processing packet to the terminal by the second base station through a second bearer channel for forwarding the RRC message or the RRC message processing packet generated by the processor.

The transceiver 1910 transmits a first bearer path of the RRC message generated by the processor 1911, including: PDCP entity unit, RLC entity unit, MAC entity unit, and physical layer unit.

The transceiver 1910 may also receive and forward an RRC message or an RRC message processing packet generated by the second base station.

The transceiver 1910 may forward the received RRC message or RRC message handling data packet by forwarding a downlink channel of the second bearer channel of the RRC message or RRC message handling data packet generated by the second base station.

The transceiver 1910 may forward a second bearer path of the RRC message generated by the second base station or the RRC message handling data packet, including: the method comprises the following steps: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

The transceiver 1910 may further receive feedback information of an RRC message sent by the terminal, where the feedback information of the RRC message carries indication information and/or a transmission identifier. The indication information is used for indicating one of the following:

indicating a receiving base station and/or a base station cell of the feedback information of the RRC message to forward the feedback information of the RRC message;

indicating a receiving base station and/or a base station cell of the feedback information of the RRC message to analyze the feedback information of the RRC message to an RRC layer;

indicating cell information of a target base station and/or a target base station to which a receiving base station and/or a base station cell of the feedback information of the RRC message forwards the feedback information of the RRC message;

And the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

The transceiver 1910 may also send the feedback information of the received RRC message through an uplink channel of a bearer channel for forwarding the RRC message generated by the second base station after receiving the feedback information of the RRC message sent by the terminal.

The transceiver 1910 may further send configuration information of a bearer tunnel to the terminal, where the configuration information carries indication information, where the indication information is used to indicate a base station or a base station cell generated by an RRC message sent by the bearer tunnel, or is used to indicate a type of the base station or the base station cell generated by the RRC message sent by the bearer tunnel and an RRC message, or is used to indicate a type of the RRC message sent by the bearer tunnel. The indication information includes one of: SRB identification information corresponding to the bearer channel; carrying identification information of the channel; identification information of a base station or a base station cell; logical channel identification information.

Referring to fig. 19B, a schematic structural diagram of a base station applicable to scheme one is shown, where the base station may be an MeNB or an SeNB. As shown, the base station may include: a transceiver 1920 and a processor 1921, wherein each component may perform the corresponding processing in scenario one. As shown in the figure:

a transceiver 1920, configured to receive an RRC message or an RRC message processing packet sent by the first base station, where the RRC message or the RRC message processing packet is generated by the first base station; and sending the RRC message to the terminal through a bearer channel for forwarding the RRC message generated by the first base station.

The transceiver 1920 may receive a random access response message or a random access response message processing data packet sent by the first base station, where the random access response message or the random access response message processing data packet is generated by the first base station; and sending the random access response message to the terminal through a bearer channel used by the second base station for forwarding the random access response message generated by the first base station. The random access response message carries indication information, where the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

The RRC message carries information for identifying a base station and/or a base station cell generating the RRC message. The information for identifying the base station and/or the base station cell generating the RRC message is an identifier of the base station and/or the base station cell; or, the information for identifying the base station and/or the base station cell generating the RRC message is a transmission identifier of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

The transceiver 1920 may also receive feedback information of an RRC message sent by the terminal, where the feedback information of the RRC message carries indication information and/or a transmission identifier. The indication information is used for indicating one of the following:

The transceiver 1920 forwards the bearer path of the RRC message generated by the first base station or the RRC message processing data packet, which includes: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

The transceiver 1920 can also transmit configuration information of a bearer channel for transmitting an RRC message and/or an RRC message handling packet to the terminal; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

The configuration information of the bearer channel comprises one or a combination of the following information: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

The transceiver 1920 transmits indication information corresponding to the configuration information of the bearer channel to a terminal, where the indication information is used to indicate a base station or a base station cell generated by an RRC message sent by the bearer channel, or is used to indicate types of the base station or the base station cell and the RRC message generated by the RRC message sent by the bearer channel, or is used to indicate a type of the RRC message sent by the bearer channel.

Based on the same technical concept, the embodiment of the invention also provides a terminal applicable to the scheme two.

Fig. 20 is a schematic structural diagram of a terminal applicable to the second scheme. As shown, the terminal may include: a transceiver 2010 and a processor 2011, wherein each component may perform the corresponding process in scenario two. As shown in the figure:

a transceiver 2010 for receiving an RRC message; and sending the feedback information of the RRC message generated by the processor to a base station generating the RRC message and/or to other base stations except the base station generating the RRC message.

The processor 2011 is configured to generate feedback information of the RRC message according to the RRC message received by the transceiver.

A transceiver 2010 for receiving a random access response message; sending the feedback information of the random access response message generated by the processor to the base station generating the random access response message and/or to other base stations except the base station generating the random access response message;

the processor 2011 is configured to generate feedback information of the random access response message according to the random access response message received by the transceiver.

The processor is further configured to determine a base station and/or a base station cell that generated the RRC message after the transceiver receives the RRC message.

The processor is specifically configured to determine, according to information carried in the RRC message and used for identifying a base station and/or a base station cell that generates the RRC message, the base station and/or the base station cell that generates the RRC message; and/or determining the base station and/or the base station cell which generates the RRC message according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents.

The feedback information of the RRC message carries indication information and/or a transmission identifier.

The indication information is used to indicate that the following contents are as described above, and are not described herein again.

The base station generating the RRC message is a first base station, other base stations except the base station generating the RRC message are second base stations, and the number of the second base stations is one or more; the transceiver is specifically configured to send, by the first base station, feedback information of the RRC message to the first base station through an uplink channel of a bearer channel of the RRC message generated by the first base station, and/or send, by the second base station, feedback information of the RRC message to the second base station by forwarding the RRC message generated by the first base station or the uplink channel of the bearer channel of the RRC message processing data packet.

The transceiver is further configured to receive configuration information of a bearer channel, which is sent by the base station and used for sending an RRC message and/or an RRC message processing data packet; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

The transceiver is further configured to receive indication information corresponding to the configuration information of the bearer channel, where the indication information is used to indicate a base station or a base station cell generated by an RRC message sent by the bearer channel, or is used to indicate types of the base station or the base station cell and the RRC message generated by the RRC message sent by the bearer channel, or is used to indicate a type of the RRC message sent by the bearer channel.

The indication information includes one of: SRB identification information corresponding to the bearer channel; carrying identification information of the channel; identification information of a base station or a base station cell; logical channel identification information.

The transceiver is further configured to send feedback information of the RRC message to a base station that generates the RRC message and/or to another base station other than the base station that generates the RRC message by: and sending the feedback message of the RRC message to a dedicated bearer channel which is used by the base station generating the RRC message for sending the feedback message of the RRC message, wherein the dedicated bearer channel belongs to the base station generating the RRC message, or does not belong to the base station generating the RRC message, or partially belongs to the base station generating the RRC message.

Based on the same technical concept, the embodiment of the invention also provides a base station applicable to the third scheme.

Referring to fig. 21A, a schematic structural diagram of a base station applicable to scheme three is shown, where the base station may be an MeNB or an SeNB. As shown, the base station may include: a transceiver 2110 and a processor 2111, wherein each component may perform the corresponding processing in scheme three. As shown in the figure:

the processor 2110 is configured to generate an RRC message transmission configuration request message, where the RRC message transmission configuration request message is used to request a second base station to establish a bearer channel for forwarding an RRC message generated by a first base station or an RRC message processing data packet, and the first base station is the local base station;

a transceiver 2111, configured to send the RRC message transmission configuration request message generated by the processor to the second base station.

The RRC message transmission configuration request message carries one or a combination of the following information:

The expecting the second base station to establish bearer channel configuration information for the second base station to forward the RRC message generated by the first base station includes: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

The expecting the second base station to establish bearer channel configuration information for the second base station to forward the RRC message generated by the first base station includes: PDCP layer configuration information, RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

The configuration information of the bearer channel includes: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

The RRC message transmission configuration request message carries indication information, where the indication information indicates that a bearer channel for requesting the second base station to establish for forwarding the RRC message generated by the first base station or the RRC message processing data packet is, at the second base station: the combination of the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station, or the combination of the PDCP entity unit, the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station.

The transceiver 2111 is further configured to receive an acknowledgement message corresponding to the RRC message transmission configuration request message returned by the second base station.

The acknowledgement message received by the transceiver 2111 includes the bearer channel configuration information of the second station, and/or the configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet.

The transceiver 2111 is further configured to, after receiving an acknowledgement message corresponding to the RRC message transmission configuration request message returned by the second base station, send configuration information of a bearer channel used for transmitting the RRC message to the terminal, where the bearer channel configuration information includes one or a combination of the following:

The processor 2110 is further configured to generate an RRC message transmission configuration modification message, where the RRC message transmission configuration modification message is used to request the second base station to modify a bearer channel of the second base station for forwarding the RRC message or the RRC message processing data packet generated by the first base station, and/or to notify the second base station that configuration information of the bearer channel of the first base station is modified; the transceiver 2111 is further configured to send the processor-generated RRC message transmission configuration modification message to the second base station.

The RRC message transmission configuration modification message carries configuration information of a bearer channel that the first base station expects the second base station to modify, where the configuration information of the bearer channel that the first base station expects the second base station to modify includes: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

The transceiver 2111 is further configured to, after sending an RRC message transmission configuration modification message to the second base station, receive a confirmation message corresponding to the RRC message transmission configuration modification message, which is returned by the second base station; the confirmation message includes: and the second base station modified by the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

The transceiver 2111 is further configured to send, to the terminal, the configuration information of the bearer channel, where the second base station modified by the second base station forwards the RRC message generated by the first base station or the RRC message processing data packet.

The processor 2110 is further configured to generate an RRC message transmission configuration release message, where the RRC message transmission configuration release message is used to request the second base station to release a bearer channel through which the second base station forwards an RRC message generated by the first base station or an RRC message processing data packet, and/or is used to notify the second base station that the first base station releases the bearer channel through which the RRC message is sent; the transceiver 2111 is further configured to send the RRC message transmission configuration release message generated by the processor to the second base station.

The processor 2110 is further configured to, after the transceiver sends the RRC message transmission configuration release message to the second base station, send an RRC message transmission configuration request message to the terminal, where the RRC message transmission configuration request message is used to notify the terminal of a release condition of a bearer channel through which the RRC message is sent.

Referring to fig. 21B, a schematic structural diagram of a base station applicable to scheme three, where the base station may be an MeNB or an SeNB. As shown, the base station may include: a transceiver 2120 and a processor 2121, wherein each component may perform the corresponding processing procedure in scheme three. As shown in the figure:

a transceiver 2120, configured to receive a configuration request message of an RRC message transmission channel sent by a first base station;

a processor 2121, configured to establish, according to the configuration request message of the RRC message transmission channel received by the transceiver, a bearer channel for a second base station to forward an RRC message generated by the first base station or an RRC message processing data packet, where the second base station is the local base station.

The information carried in the RRC message transmission configuration request message is the same as described above.

The processor 2121 is further configured to, after establishing a bearer channel through which the second base station forwards the RRC message generated by the first base station or the RRC message processing data packet, generate a confirmation message corresponding to the RRC message transmission configuration request message; the transceiver 2120 is further configured to send the processor-generated acknowledgement message to the first base station.

The confirmation message comprises the configuration information of the bearer channel of the second station, and/or the second base station forwards the configuration information of the bearer channel of the RRC message processing data packet or the RRC message generated by the first base station; the configuration information of the bearer channel includes: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

The processor 2121 is further configured to, after sending an acknowledgement message corresponding to the RRC message transmission configuration request message to the first base station, generate configuration information of a bearer for transmitting the RRC message, where the bearer configuration information includes one or a combination of the following:

the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet;

the transceiver is further configured to send, to the terminal, configuration information of a bearer channel generated by the processor and used for transmitting the RRC message.

The transceiver 2120 is further configured to receive an RRC message transmission configuration modification message sent by the first base station, where the RRC message transmission configuration modification message is used to request the second base station to modify a bearer channel of the second base station for forwarding an RRC message generated by the first base station or an RRC message processing data packet, and/or to notify the second base station that configuration information of the bearer channel of the first base station is modified; the processor 2121 is further configured to modify, according to the RRC message transmission configuration modification message, a bearer path through which the second base station forwards an RRC message generated by the first base station or an RRC message processing data packet.

Processor 2121 is further configured to generate, after the transceiver receives an RRC message transmission configuration modification message sent by a first base station, an acknowledgement message corresponding to the RRC message transmission configuration modification message; the transceiver 2120 is further configured to return the processor-generated acknowledgement message to the first base station.

The transceiver 2120 is further configured to send the modified second base station to the terminal, where the modified second base station forwards the configuration information of the bearer channel of the RRC message generated by the first base station or the RRC message processing data packet.

The transceiver 2120 is further configured to receive an RRC message transmission configuration release message sent by the first base station, where the RRC message transmission configuration release message is used to request the second base station to release a bearer channel through which the second base station forwards an RRC message generated by the first base station or an RRC message processing data packet, and/or to notify the second base station that the first base station releases the bearer channel through which the RRC message is sent; the processor 2121 is further configured to release, according to the RRC message transmission configuration release message, a bearer channel through which the second base station forwards an RRC message generated by the first base station or an RRC message processing data packet.

The transceiver 2120 is further configured to, after the processor places the second base station to forward the RRC message generated by the first base station or the bearer channel of the RRC message processing data packet, send an RRC message transmission configuration request message to the terminal, where the RRC message transmission configuration request message is used to notify the terminal of a release condition of the bearer channel through which the RRC message is sent.

Based on the same technical concept, the embodiment of the present invention further provides a terminal applicable to scheme three, and the terminal can communicate with the base station described in fig. 21B and 21C.

Referring to fig. 21C, the terminal may include: the transceiver 2130, further, may further include a processor 2131, wherein:

a transceiver 2130, configured to receive configuration information of a bearer channel sent by a base station, where the bearer channel includes one or a combination of the following configuration information:

Further, the transceiver 2130 can also receive assistance information sent by the base station, the assistance information including a C-RNTI for a second base station cell assigned to the terminal by the base station.

Further, the transceiver 2130 may also receive and/or transmit data from the corresponding bearer channel according to the received configuration information of the bearer channel after receiving the configuration information of the bearer channel sent by the base station; or, after accessing the base station by using the random access process, receiving and/or sending data from the corresponding bearer channel according to the configuration information of the bearer channel configured in advance for transmitting the RRC message. The transceiver 2130 may receive indication information sent by the base station, establish a bearer channel according to the indication information and using the received configuration information of the bearer channel, and receive or send data from the corresponding bearer channel. The indication information may include: the RRC layer indication information of the base station, the MAC layer command and the physical layer command are combined.

Optionally, the transceiver 2130 may also send indication information to the base station, and trigger the base station that receives the indication information to start sending and/or receiving data according to the configuration information of the sent bearer channel. Further, the transceiver 2130 may also receive and/or transmit data from the corresponding bearer channel according to the indication information and by using the bearer channel corresponding to the received configuration information of the bearer channel.

Further, the transceiver 2130 may also receive the modified configuration information of the bearer channel for transmitting the RRC message or the RRC message data packet sent by the base station.

Further, the transceiver 2130 can also receive a release message of the RRC message bearer channel sent by the base station. Accordingly, the processor 2131 may release the corresponding bearer channel for transmitting the RRC message or the RRC message data packet according to the release message received by the transceiver.

Further, the configuration information of the bearer channel may include: the signaling carries at least one parameter configuration information of identification information, PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information and physical layer unit information.

Further, the configuration information of the bearer channel may further include: at least one parameter configuration information of network node information of PDCP entity unit, network node information of RLC entity unit, network node information of MAC entity unit, and network node information of physical layer unit; alternatively, the configuration information of the bearer channel may further include: the PDCP entity unit, the RLC entity unit, the MAC entity unit and the first network node information of the physical layer unit belong to the same, and/or the second network node information of the RLC entity unit, the MAC entity unit and the second network node information of the physical layer unit belong to the same.

Based on the same technical concept, the embodiment of the invention also provides a base station applicable to the scheme four.

Fig. 22A is a schematic structural diagram of a base station applicable to scheme four. As shown, the base station may include: transceiver 2210, and processor 2211, where each component may perform the corresponding processing in scheme four. As shown in the figure:

a transceiver 2210, configured to send a control plane data packet and indication information to a second base station, so that the second base station sends the control plane data packet and/or scheduling information of the second base station according to the control information; wherein the indication information is sent before, after or simultaneously with the control plane data packet. The type of the control plane data packet is the same as that described above, and is not detailed here; the type and composition of the indication information may be as described above, and will not be described in detail here.

Referring to fig. 22B, a schematic diagram of a base station applicable to scheme four is shown. As shown, the base station may include: a transceiver 2220 and a processor 2221, each of which may perform a corresponding process in scenario four. As shown in the figure:

a transceiver 2220, configured to receive a control plane data packet and indication information sent by a first base station; the indication information is sent before, after or simultaneously with the control plane data packet; the type of the control plane data packet is the same as that described above, and is not detailed here; the type and composition of the indication information may be as described above, and will not be described in detail here.

It should be noted that the cell involved in each embodiment of the present invention may be an existing cell, a new carrier type cell, or a cell newly designed in the future, and the present invention does not limit the specific type of the cell. The operations performed by the base station described in the embodiments of the present invention may also be operations performed by a cell of the base station. The attribute of the base station may also be an attribute of a base station cell, and the information of the base station may also be information of the base station cell.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A method for message transmission, comprising:

the terminal receives the RRC message;

the terminal sends the feedback information of the RRC message to a first base station which generates the RRC message and a second base station except the first base station, wherein the RRC message is sent by the first base station through the second base station; or the terminal sends the feedback information of the RRC message to a second base station other than the first base station, where the first base station is the base station that generates the RRC message, and the RRC message is sent by the first base station through the second base station.

2. The method of claim 1,

the terminal receives a random access response message;

and the terminal sends the feedback information of the random access response message to the first base station generating the random access response message and/or to the second base station, wherein the random access response message is sent by the first base station through the second base station.

3. The method of claim 1, wherein after the terminal receives the RRC message, further comprising: the terminal determines the first base station and/or base station cell.

4. The method of claim 3, wherein the terminal determining the first base station and/or base station cell comprises:

the terminal determines the first base station and/or the base station cell according to the information which is carried in the RRC message and used for identifying the first base station and/or the base station cell; and/or

And the terminal determines the first base station and/or the base station cell according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents.

5. The method of claim 4, wherein the information identifying the first base station and/or base station cell is an identification of the first base station and/or base station cell; or

The information for identifying the first base station and/or the base station cell is a transmission identifier of an RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

6. The method of claim 5, wherein the mapping relationship is negotiated between the first base station and/or base station cell and then sent to the terminal.

7. The method according to claim 5, wherein when the information for identifying the first base station and/or the base station cell is a transmission identifier of an RRC message, before the terminal determines the first base station and/or the base station cell according to the transmission identifier of the RRC message carried in the RRC message, the method further includes:

and the terminal acquires the mapping relation information between the transmission identifier sent by the first base station or locally stored and the first base station and/or the mapping relation information between the transmission identifier and the base station cell.

8. The method of claim 5, wherein the transmission identity is a Transaction identity, Transaction ID, of an RRC message.

9. The method of claim 1, wherein the RRC message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the RRC message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message.

10. The method of claim 2, wherein the random access response message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

11. The method of claim 1, wherein feedback information of the RRC message carries indication information and/or a transmission identifier.

12. The method of claim 9, wherein the indication information is used to indicate one of:

indicating the first base station and/or base station cell that generated the RRC message.

13. The method according to claim 9, wherein the terminal carries the indication information in an SDU or PDU of the PDCP layer corresponding to the feedback information of the RRC message, or in an SDU or PDU of the RLC layer;

or, the terminal carries the indication information in an RRC message used for sending feedback information of the RRC message.

14. The method of claim 9, wherein the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

15. The method of claim 1, wherein the number of the second base stations is one or more;

the terminal sends the feedback information of the RRC message to a first base station which generates the RRC message and a second base station except the first base station, wherein the RRC message is sent by the first base station through the second base station, and the method comprises the following steps:

the terminal sends the feedback information of the RRC message to the first base station through an uplink channel of a bearer channel of the RRC message generated by the first base station, forwards the RRC message generated by the first base station or the uplink channel of the bearer channel of the RRC message processing data packet through the second base station, and sends the feedback information of the RRC message to the second base station;

or, the terminal sends the feedback information of the RRC message to a second base station other than the first base station, where the first base station is the base station that generates the RRC message, and the RRC message is sent by the first base station through the second base station, and includes:

and the terminal forwards the RRC message generated by the first base station or the uplink channel of the bearer channel of the RRC message processing data packet through the second base station, and sends the feedback information of the RRC message to the second base station.

16. The method of claim 15, wherein the first bearer for the RRC message generated by the first base station and the second bearer for the RRC message generated by the second base station and the RRC message processing packet forwarded by the first base station are the same bearer; and/or

The second bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet is the same as the first bearer channel for the second base station to send the RRC message generated by the second base station.

17. The method of claim 16, wherein the first base station transmitting the RRC message generated by the first base station and a bearer path forwarding the RRC message generated by the second base station or the RRC message handling data packet, comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit; and/or

The second base station sending the RRC message generated by the second base station and forwarding the RRC message generated by the first base station or a bearer channel of the RRC message processing data packet, includes: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

18. The method of claim 15, wherein the first base station sends a first bearer for the RRC message generated by the first base station, and a second bearer for the first base station to forward the RRC message generated by the second base station or the RRC message handling data packet is a different bearer; and/or

The second bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet is different from the first bearer channel for the second base station to send the RRC message generated by the second base station.

19. The method of claim 18, wherein the first bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; and/or, the bearer path of the second base station includes: PDCP entity unit, RLC entity unit, MAC entity unit, and physical layer unit.

20. The method of claim 18, wherein the second bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the terminal comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the first base station and a bearing channel formed by the PDCP entity unit or an independent PDCP entity unit in a first bearing channel of the second base station provide services for the terminal.

21. The method of claim 18, wherein the second bearer path of the second base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the second base station comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the second base station and a bearing channel formed by the PDCP entity unit in a first bearing channel of the first base station or an independent PDCP entity unit provide service for the terminal.

22. The method of claim 15, wherein the bearer channel comprises an uplink channel and/or a downlink channel.

23. The method of claim 15, wherein the SRB identification of the first bearer path of the first base station is the same as or different from the SRB identification of the second bearer path of the second base station forwarding the RRC message or RRC message handling packet of the SRB.

24. The method of claim 23, wherein the SRB identity is an extended SRB identity.

25. The method of claim 1, further comprising: the terminal receives configuration information of a bearer channel which is sent by a base station and used for sending RRC messages and/or RRC message processing data packets; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

26. The method of claim 25, wherein the configuration information of the bearer channel comprises one or a combination of: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

27. The method of claim 25, further comprising:

the terminal receives indication information corresponding to the configuration information of the bearer channel, where the indication information is used to indicate a base station or a base station cell generated by the RRC message sent by the bearer channel, or is used to indicate a type of the base station or the base station cell generated by the RRC message sent by the bearer channel and the RRC message, or is used to indicate a type of the RRC message sent by the bearer channel.

28. The method of claim 27, wherein the indication information is included in configuration information of the bearer channel.

29. The method of claim 27, wherein the indication information comprises one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

30. The method of claim 27, further comprising:

the terminal acquires information sent by a base station or locally stored, and the indication information has a mapping relation with one of the following information:

a base station or a base station cell is generated by the RRC message sent by the bearing channel;

a base station or a base station cell and the type of the RRC message are generated by the RRC message sent by the bearing channel;

the type of RRC message sent by the bearer channel.

31. The method of claim 25, wherein the SRB of the bearer path is an expanded SRBN, N being a natural number greater than 2.

32. The method of claim 25, wherein the identification information of the bearer channel is an SRB identification or a new type of bearer identification.

33. The method of claim 25, wherein the logical channel identifiers used by the SRB or the bearer path are extended logical channel identifiers, and wherein the extended logical channel identifiers are logical channel identifiers other than 0 and 1.

34. The method of claim 25, wherein the configuration information of the bearer channel comprises SRB bearer identities and configuration information of a corresponding plurality of bearer channels.

35. The method of claim 34, wherein the SRB carries information indicating a generation base station and/or a base station cell of the RRC message of the SRB bearer identification, wherein the base station and/or the base station cell to which the PDCP layer of the nth bearer or the mth bearer of the corresponding plurality of bearers belongs.

36. The method of claim 25, wherein the configuration information of the bearer channel comprises configuration information of a plurality of bearer channels.

37. The method according to claim 36, wherein the SRB identity is the same as the bearer identity of the nth bearer in the plurality of bearer channels identified by the SRB identity, and/or the information of the generating base station and/or the base station cell of the RRC message identified by the SRB identity is the same as the base station and/or the base station cell to which the mth bearer belongs.

38. The method of claim 1, wherein the feedback information of the RRC message is an RRC message of an RRC layer; or

The feedback information of the RRC message is one of the following data packets of the RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, and data packets at the physical layer.

39. The method of claim 15, wherein the RRC message handling packet is one of the following packets of an RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, and data packets at the physical layer.

40. The method of claim 1, wherein the RRC message comprises one or a combination of: the RRC connection setup message, the RRC connection setup rejection message, the RRC reconfiguration message, the RRC connection reestablishment rejection message, and the RRC connection setup release.

41. The method of claim 1, wherein the RRC message corresponding to the feedback information of the RRC message and the feedback information of the random access response message comprises one of:

the system comprises an RRC connection establishment request, an RRC connection establishment completion message, an RRC connection establishment failure message, an RRC reconfiguration completion message, an RRC reconfiguration failure message, an RRC connection reestablishment request message, an RRC connection reestablishment completion message, an RRC connection reestablishment failure message and a measurement report message of the terminal.

42. The method of claim 41, wherein the terminal sends an RRC reconfiguration complete message to the first base station that generated the RRC message and to the second base stations other than the first base station.

43. The method of claim 42, wherein the sending the RRC reconfiguration complete message occurs during establishment of at least one of an SRB bearer, a DRB bearer, a tunnel bearer, or a data offload bearer of the second base station.

44. The method according to any of claims 1-43, wherein the terminal sends feedback information of the RRC message to a first base station that generated the RRC message and to a second base station other than the first base station by:

the terminal sends the feedback message of the RRC message to a special bearing channel used by the first base station for sending the feedback message of the RRC message, wherein the special bearing channel part belongs to the first base station;

the terminal sends the feedback information of the RRC message to a second base station except for a first base station in the following mode, wherein the first base station is the base station generating the RRC message, and the RRC message is sent by the first base station through the second base station:

and the terminal sends the feedback message of the RRC message to a special bearing channel which is used for sending the feedback message of the RRC message by the first base station, wherein the special bearing channel does not belong to the first base station.

45. A method for message transmission, comprising:

the first base station generates an RRC message;

the first base station sends the RRC message to a terminal, and sends the RRC message or the RRC message processing data packet to the terminal through a second base station, wherein the number of the second base stations is one or more; or, the first base station sends the RRC message or the RRC message processing packet to a terminal through a second base station, where the number of the second base stations is one or more.

46. The method of claim 45, wherein the first base station generates a receive random access response message; and the first base station sends the random access response message to the terminal, and/or sends the random access response message or the random access response message processing data packet to the terminal through a second base station, wherein the number of the second base stations is one or more.

47. The method of claim 46, wherein the random access response message carries indication information, and the indication information is used for indicating a bearer channel for sending feedback information of the random access response message, or the indication information is used for indicating a base station and/or base station cell information for receiving the feedback information of the random access response message.

48. The method of claim 45, wherein the RRC message carries information identifying a base station and/or a base station cell that generated the RRC message.

49. The method of claim 48, wherein the information identifying the base station and/or base station cell generating the RRC message is an identification of a base station and/or base station cell; or

The information for identifying the base station and/or the base station cell generating the RRC message is a transmission identification of the RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

50. The method of claim 49, wherein the transmission identification is a Transaction identification (Transaction ID) of an RRC message.

51. The method of claim 49, further comprising:

the first base station and the second base station negotiate a mapping relation between the transmission identifier and the base station or the base station cell.

52. The method of claim 51, wherein after the first base station and the second base station negotiate the mapping relationship between the transmission identifier and the base station or the base station cell, further comprising:

and the first base station sends the negotiated mapping relation information of the transmission identifier and the base station or the base station cell to the terminal.

53. The method of claim 45, wherein the RRC message carries indication information, and the indication information is used for indicating a bearer channel for sending feedback information of the RRC message, or the indication information is used for indicating a base station and/or base station cell information for receiving the feedback information of the RRC message.

54. The method of claim 45, wherein the first base station transmitting the RRC message to the terminal comprises:

the first base station sends the RRC message generated by the first base station to a terminal through a downlink channel of a first bearer channel of the RRC message;

the first base station sends the RRC message or the RRC message processing data packet to the terminal through the second base station, and the method comprises the following steps:

the first base station sends the RRC message or the RRC message processing data packet generated by the first base station to the second base station, and the second base station forwards the received RRC message or the RRC message processing data packet to the terminal through a second bearer channel for forwarding the RRC message or the RRC message processing data packet generated by the first base station.

55. The method of claim 45, further comprising:

the first base station receives an RRC message or an RRC message processing data packet generated by the second base station;

and the first base station forwards the RRC message or the RRC message processing data packet generated by the second base station.

56. The method of claim 55, wherein the first base station forwarding the RRC message or RRC message handling data packet generated by the second base station comprises:

and the first base station forwards the RRC message generated by the second base station or the downlink channel of the second bearer channel of the RRC message processing data packet through the first base station, and forwards the received RRC message or the RRC message processing data packet.

57. The method of claim 45, further comprising: and the first base station receives feedback information of the RRC message sent by the terminal.

58. The method of claim 57, wherein feedback information of the RRC message carries indication information and/or a transmission identifier.

59. The method of claim 58, wherein the indication information is used to indicate one of:

60. The method of claim 58, wherein the indication information is carried in SDU or PDU of PDCP layer corresponding to the feedback information of the RRC message, or in RLC layer SDU or PDU;

or, the indication information is carried in an RRC message used for sending feedback information of the RRC message.

61. The method of claim 58, wherein the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

62. The method of claim 58, wherein after the first base station receives the feedback information of the RRC message sent by the terminal, the method further comprises:

and the first base station transmits the feedback information of the received RRC message through an uplink channel of a bearer channel of the RRC message generated by the second base station forwarded by the first base station.

63. The method according to claim 61, wherein the first base station sends the feedback information of the received RRC message through an uplink channel of a bearer channel for the first base station to forward the RRC message generated by the second base station, the feedback information comprising at least one of:

the RRC entity of the first base station analyzes the indication information in the RRC message of the feedback information of the RRC message and sends part or all of the RRC message of the feedback information of the RRC message to the RRC entity of the second base station;

the RRC entity of the first base station analyzes the indication information in the RRC message of the feedback information of the RRC message and sends the SDU of the PDCP of the feedback information of the RRC message to the RRC entity of the second base station;

after the PDCP entity unit of the first base station parses the indication information in the PDCP PDU or the SDU of the RLC corresponding to the feedback information of the RRC message, according to the indication information, the PDCP PDU or the SDU of the RLC is forwarded to the PDCP entity of the second base station, or the PDCP SDU is sent to the RRC entity of the second base station;

after the RLC entity unit of the first base station parses the indication information in the RLC PDU corresponding to the feedback information of the RRC message, the RLC PDU is forwarded to the PDCP entity of the second base station according to the indication information, or the RLC PDU is sent to the RLC entity of the second base station.

64. The method of claim 54, wherein the first bearer for the first base station to send the RRC message generated by the first base station and the second bearer for the first base station to forward the RRC message generated by the second base station or the RRC message handling data packet are the same bearer; and/or

65. The method of claim 64, wherein the first base station transmitting the RRC message generated by the first base station and forwarding the RRC message generated by the second base station or the bearer path of the RRC message handling data packet comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit; and/or

The second base station sends the RRC message generated by the second base station and forwards the RRC message generated by the first base station or a bearer channel of the RRC message processing data packet, and the bearer channel comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

66. The method of claim 54, wherein the first bearer for the first base station to send the RRC message generated by the first base station and the second bearer for the first base station to forward the RRC message generated by the second base station or the RRC message handling data packet are different bearers; and/or

67. The method of claim 64, wherein the first bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; and/or, the bearer path of the second base station includes: PDCP entity unit, RLC entity unit, MAC entity unit, and physical layer unit.

68. The method of claim 66, wherein the second bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the terminal comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the first base station and a bearing channel formed by the PDCP entity unit or an independent PDCP entity unit in a first bearing channel of the second base station provide services for the terminal.

69. The method of claim 66, wherein the second bearer path of the second base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the terminal comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the second base station and a bearing channel formed by the PDCP entity unit or an independent PDCP entity unit in a first bearing channel of the first base station provide services for the terminal.

70. The method of claim 53, wherein the bearer channel comprises an uplink channel and/or a downlink channel.

71. The method of claim 45, further comprising:

a first base station sends configuration information of a bearer channel for sending an RRC message and/or an RRC message processing data packet to a terminal; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

72. The method of claim 71, wherein the configuration information of the bearer channel comprises one or a combination of: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

73. The method of claim 71, further comprising:

the first base station sends indication information corresponding to the configuration information of the bearer channel to a terminal, wherein the indication information is used for indicating a generation base station or a base station cell of an RRC message sent by the bearer channel, or is used for indicating the types of the generation base station or the base station cell and the RRC message of the RRC message sent by the bearer channel, or is used for indicating the type of the RRC message sent by the bearer channel.

74. The method of claim 73, wherein the indication information is included in configuration information of the bearer channel.

75. The method of claim 73, wherein the indication information comprises one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

76. The method of claim 73, further comprising:

the first base station sends the mapping relation information of the indication information and one of the following information to the terminal:

the type of RRC message sent by the bearer channel.

77. The method of claim 71, wherein the SRB of the bearer path is an expanded SRBN, and N is a natural number greater than 2.

78. The method of claim 71, wherein the identification information of the bearer channel is an SRB identification or a new type of bearer identification.

79. The method of claim 71, wherein the logical channel identifiers used by the SRB or the bearer path are extended logical channel identifiers, and wherein the extended logical channel identifiers are logical channel identifiers other than 0 and 1.

80. The method of claim 71, wherein the configuration information of the bearer channel comprises an SRB bearer identity and configuration information of a corresponding plurality of bearer channels.

81. The method of claim 80, wherein the SRB carries information indicating a generation base station and/or a base station cell of the RRC message of the SRB bearer identity, wherein the base station and/or the base station cell to which the PDCP layer of the Nth bearer channel or the Mth bearer channel of the corresponding plurality of bearer channels belongs.

82. The method of claim 71, wherein the configuration information of the bearer channel comprises configuration information of a plurality of bearer channels.

83. The method of claim 82, wherein the SRB identity is the same as the bearer identity of the Nth bearer in the plurality of bearer channels identified by the SRB identity, and wherein the information of the base station and/or the base station cell generating the SRB identity of the RRC message identified by the SRB identity is the same as the base station and/or the base station cell to which the Mth bearer belongs.

84. The method of claim 45, wherein the feedback information of the RRC message is an RRC message of an RRC layer; or

85. The method according to any of claims 45-84, wherein the RRC message handling packet is one of the following packets of an RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, and data packets at the physical layer.

86. The method of any one of claims 45-84, wherein the RRC message comprises one or a combination of: the RRC connection setup message, the RRC connection setup rejection message, the RRC reconfiguration message, the RRC connection reestablishment rejection message, and the RRC connection setup release.

87. The method according to any of claims 45-84, wherein the RRC message to which the feedback information of the RRC message and the feedback information of the random access response message correspond comprises one of:

88. An RRC message transmission method, comprising:

the second base station receives an RRC message or an RRC message processing data packet sent by the first base station, wherein the RRC message or the RRC message processing data packet is generated by the first base station;

and the second base station sends the RRC message to the terminal through a bearing channel which is used for forwarding the RRC message generated by the first base station.

89. The method of claim 88, comprising:

the second base station receives a random access response message or a random access response message processing data packet sent by the first base station, wherein the random access response message or the random access response message processing data packet is generated by the first base station;

and the second base station sends the random access response message to the terminal through a bearing channel which is used for forwarding the random access response message generated by the first base station.

90. The method of claim 89, wherein the random access response message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

91. The method of claim 88, wherein the RRC message carries information identifying a base station and/or a base station cell that generated the RRC message.

92. The method of claim 91, wherein the information identifying the base station and/or base station cell generating the RRC message is an identification of a base station and/or base station cell; or

93. The method of claim 92, wherein the transmission identification is a Transaction identification, Transaction ID, of an RRC message.

94. The method of claim 92, further comprising:

the second base station and the first base station negotiate a mapping relationship between the transmission identifier and the base station or the base station cell.

95. The method of claim 94, wherein after the second base station and the first base station negotiate the mapping relationship between the transmission identifier and the base station or the base station cell, further comprising:

and the second base station sends the negotiated mapping relation information of the transmission identifier and the base station or the base station cell to the terminal.

96. The method of claim 88, wherein the RRC message carries indication information, and wherein the indication information is used for indicating a bearer channel for sending the feedback information of the RRC message, or wherein the indication information is used for indicating a base station and/or base station cell information for receiving the feedback information of the RRC message.

97. The method of claim 88, further comprising: and the second base station receives the feedback information of the RRC message sent by the terminal.

98. The method of claim 97, wherein feedback information of the RRC message carries indication information and/or a transmission identity.

99. The method of claim 98, wherein the indication information is used to indicate one of:

100. The method of claim 97, wherein the indication information is carried in an SDU or PDU of a PDCP layer corresponding to the feedback information of the RRC message, or in an RLC layer SDU or PDU;

101. The method of claim 97, wherein the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

102. The method of claim 88, wherein the first bearer for the first base station to send the RRC message generated by the first base station and the second bearer for the first base station to forward the RRC message generated by the second base station or the RRC message handling packet are the same bearer; and/or

103. The method of claim 102, wherein the first base station transmitting the RRC message generated by the first base station and forwarding the RRC message generated by the second base station or the bearer path of the RRC message handling packet comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit; and/or

104. The method of claim 102, wherein the first bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; and/or, the bearer path of the second base station includes: PDCP entity unit, RLC entity unit, MAC entity unit, and physical layer unit.

105. The method of claim 103, wherein the second bearer path of the first base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the terminal comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the first base station and a bearing channel formed by the PDCP entity unit or an independent PDCP entity unit in a first bearing channel of the second base station provide services for the terminal.

106. The method of claim 102, wherein the second bearer path of the second base station comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; alternatively, it comprises: the terminal comprises an RLC entity unit, an MAC entity unit and a physical layer unit, wherein the RLC entity unit, the MAC entity unit and the physical layer entity unit in a second bearing channel of the second base station and a bearing channel formed by the PDCP entity unit or an independent PDCP entity unit in a first bearing channel of the first base station provide services for the terminal.

107. The method of claim 102, wherein the bearer channel comprises an uplink channel and/or a downlink channel.

108. The method of claim 88, further comprising:

the second base station sends configuration information of a bearer channel for sending an RRC message and/or an RRC message processing data packet to the terminal; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

109. The method of claim 108, wherein the configuration information of the bearer channel comprises one or a combination of: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

110. The method of claim 108, further comprising:

and the second base station sends indication information corresponding to the configuration information of the bearer channel to the terminal, wherein the indication information is used for indicating a generation base station or a base station cell of the RRC message sent by the bearer channel, or is used for indicating the types of the generation base station or the base station cell and the RRC message of the RRC message sent by the bearer channel, or is used for indicating the type of the RRC message sent by the bearer channel.

111. The method of claim 109, wherein the indication information is included in configuration information of the bearer channel.

112. The method of claim 110, wherein the indication information comprises one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

113. The method of claim 110, further comprising:

the type of RRC message sent by the bearer channel.

114. The method of claim 108, wherein the SRB of the bearer path is an extended SRBN, N being a natural number greater than 2.

115. The method of claim 108, wherein the identification information of the bearer channel is an SRB identification or a new type of bearer identification.

116. The method of claim 108, wherein the logical channel identifiers used by the SRB or the bearer path are extended logical channel identifiers, and wherein the extended logical channel identifiers are logical channel identifiers other than 0 and 1.

117. The method of claim 108, wherein the configuration information of the bearer channel comprises SRB bearer identities and configuration information of a corresponding plurality of bearer channels.

118. The method of claim 117, wherein the SRB carries information indicating a generation base station and/or a base station cell of the RRC message of the SRB bearer identification, wherein the base station and/or the base station cell to which the PDCP layer of the nth bearer or the mth bearer of the corresponding plurality of bearers belongs.

119. The method of claim 108, wherein the configuration information of the bearer channel comprises configuration information of a plurality of bearer channels.

120. The method of claim 119, wherein the SRB identity is the same as the bearer identity of the nth bearer of the plurality of bearer channels identified by the SRB identity, and wherein the information of the generating base station and/or the base station cell of the RRC message identified by the SRB identity is the same as the base station and/or the base station cell to which the mth bearer belongs.

121. The method according to any of claims 89-120, wherein the feedback information of the RRC message is an RRC message of an RRC layer; or

122. The method according to any of claims 89-120, wherein the RRC message handling packet is one of the following packets of an RRC message: SDU data packets at the PDCP layer, SDU data packets at the RLC layer, PDU data packets at the RLC layer, data packets at the MAC layer, and data packets at the physical layer.

123. The method of any one of claims 89-120, wherein the RRC message comprises one or a combination of: the RRC connection setup message, the RRC connection setup rejection message, the RRC reconfiguration message, the RRC connection reestablishment rejection message, and the RRC connection setup release.

124. The method according to any of claims 89-120, wherein the RRC message for which the feedback information of the RRC message and the feedback information of the random access response message correspond comprises one of:

125. A terminal, comprising:

a transceiver for receiving an RRC message; sending the feedback information of the RRC message generated by the processor to a first base station generating the RRC message and a second base station except the first base station, wherein the RRC message is sent by the first base station through the second base station; or sending feedback information of the RRC message to a second base station except for the first base station, wherein the first base station is the base station generating the RRC message, and the RRC message is sent by the first base station through the second base station;

and the processor is used for generating the feedback information of the RRC message according to the RRC message received by the transceiver.

126. The terminal of claim 125, wherein the transceiver is configured to receive a random access response message; sending the feedback information of the random access response message generated by the processor to the first base station generating the random access response message and/or to the second base station, wherein the random access response message is sent by the first base station through the second base station;

the processor is configured to generate feedback information of the random access response message according to the random access response message received by the transceiver.

127. The terminal of claim 125, wherein the processor is further configured to determine the base station and/or base station cell of the first base station after the transceiver receives the RRC message.

128. The terminal of claim 125, wherein the processor is specifically configured to determine the base station and/or the base station cell of the first base station according to information carried in the RRC message for identifying the base station and/or the base station cell of the first base station; and/or determining the base station and/or the base station cell of the first base station according to the content of the RRC message, wherein the RRC messages generated by different base stations and/or base station cells have different contents.

129. The terminal of claim 128, wherein the information identifying the base station and/or base station cell of the first base station is an identification of the first base station and/or base station cell; or

The information for identifying the base station and/or the base station cell of the first base station is a transmission identifier of an RRC message; wherein, the base station or the base station cell has a mapping relation with the transmission identifier.

130. The terminal of claim 125, wherein the RRC message carries indication information, and wherein the indication information is used to indicate a bearer channel for sending feedback information of the RRC message, or wherein the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message.

131. The terminal of claim 126, wherein the random access response message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

132. The terminal of claim 125, wherein the feedback information of the RRC message carries indication information and/or a transmission identifier.

133. The terminal of claim 131, wherein the indication information is for indicating one of:

indicating the first base station and/or base station cell.

134. The terminal of claim 132, wherein the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

135. The terminal of claim 134, wherein the number of second base stations is one or more;

the transceiver, when sending the feedback information of the RRC message generated by the processor to a first base station that generates the RRC message and to a second base station other than the first base station, where the RRC message is sent by the first base station through the second base station, is specifically configured to send the feedback information of the RRC message to the first base station through an uplink channel of a bearer channel through which the first base station sends the RRC message generated by the first base station, and send the feedback information of the RRC message to the second base station through an uplink channel of a bearer channel through which the second base station forwards the RRC message generated by the first base station or an RRC message processing data packet;

or, when the transceiver sends the feedback information of the RRC message to a second base station other than the first base station, where the first base station is the base station that generates the RRC message, and the RRC message is sent by the first base station through the second base station, the transceiver is specifically configured to:

and forwarding the RRC message generated by the first base station or an uplink channel of a bearer channel of the RRC message processing data packet through the second base station, and sending feedback information of the RRC message to the second base station.

136. The terminal of claim 125, wherein the transceiver is further configured to receive configuration information of a bearer channel sent by a base station for sending RRC messages and/or RRC message handling packets; wherein the configuration information of the bearer channel includes: and the base station and/or the second base station which sends the configuration information is used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

137. The method of claim 136, wherein the configuration information of the bearer channel comprises one or a combination of: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

138. The terminal of claim 136, wherein the transceiver is further configured to receive indication information corresponding to configuration information of the bearer channel, the indication information indicating a generating base station or a base station cell of the RRC message sent by the bearer channel, or indicating a type of the generating base station or the base station cell and the RRC message of the RRC message sent by the bearer channel, or indicating a type of the RRC message sent by the bearer channel.

139. The terminal of claim 136, wherein the indication information includes one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

140. The terminal of any one of claims 125-139, wherein the transceiver is further configured to send the feedback information of the RRC message to the first base station and to the second base station other than the first base station by:

sending the feedback message of the RRC message to a dedicated bearer channel used by the first base station for sending the feedback message of the RRC message, wherein the dedicated bearer channel part belongs to the first base station;

or, the transceiver is further configured to send feedback information of the RRC message to the first base station and to the second base station other than the first base station by:

and sending the feedback message of the RRC message to a dedicated bearer channel used by the first base station for sending the feedback message of the RRC message, wherein the dedicated bearer channel does not belong to the first base station.

141. A base station, comprising:

a processor configured to generate an RRC message;

the transceiver is used for sending the RRC message generated by the processor to a terminal and sending the RRC message or the RRC message processing data packet to the terminal through a second base station, wherein the number of the second base stations is one or more; or, the number of the second base stations is one or more, and the number of the second base stations is used for sending the RRC message or the RRC message processing data packet to the terminal through the second base station.

142. The base station of claim 141, wherein the processor is configured to generate a first base station generation receive random access response message;

the transceiver is configured to send the random access response message generated by the processor to a terminal, and/or send the random access response message or the random access response message processing data packet to the terminal through a second base station, where the number of the second base stations is one or more.

143. The base station of claim 142, wherein the random access response message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

144. The base station of claim 141, wherein the RRC message carries information identifying the base station and/or base station cell of the first base station.

145. The base station of claim 144, wherein the information identifying the base station and/or base station cell of the first base station is an identification of a base station and/or base station cell; or

146. The base station of claim 141, wherein the RRC message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the RRC message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the RRC message.

147. The base station of claim 141, wherein the transceiver is specifically configured to send the RRC message to a terminal via a downlink channel of a first bearer channel for sending the RRC message generated by the processor; and/or sending the RRC message or the RRC message processing data packet generated by the processor to a second base station, and forwarding the received RRC message or the RRC message processing data packet to the terminal by the second base station through a second bearer channel for forwarding the RRC message or the RRC message processing data packet generated by the processor.

148. The base station of claim 147, wherein the transceiver transmits the first bearer path of the processor-generated RRC message, comprising: PDCP entity unit, RLC entity unit, MAC entity unit, and physical layer unit.

149. The base station of claim 141, wherein the transceiver is further configured to receive and forward RRC messages or RRC message handling packets generated by the second base station.

150. The base station of claim 149, wherein the transceiver is specifically configured to forward the received RRC message or RRC message handling data packet via a downlink channel of a second bearer channel that forwards RRC messages or RRC message handling data packets generated by the second base station.

151. The base station of claim 150, wherein the transceiver forwards a second bearer path for RRC messages or RRC message handling packets generated by a second base station, comprising: the method comprises the following steps: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

152. The base station of claim 141, wherein the transceiver is further configured to receive feedback information of an RRC message sent by a terminal, and the feedback information of the RRC message carries indication information and/or a transmission identifier.

153. The base station of claim 152, wherein the indication information indicates one of:

indicating the base station and/or base station cell of the first base station.

154. The base station of claim 152, wherein the transmission identifier carried in the feedback information of the RRC message is the same as the transmission identifier carried in the RRC message.

155. The base station of claim 152, wherein the transceiver is further configured to, after receiving the feedback information of the RRC message sent by the terminal, send the feedback information of the received RRC message through an uplink channel of a bearer channel for forwarding the RRC message generated by the second base station.

156. The base station of claim 155, wherein the transceiver is further configured to send configuration information of a bearer channel to the terminal, and the configuration information carries indication information, where the indication information is used to indicate a generating base station or a base station cell of the RRC message sent by the bearer channel, or is used to indicate a generating base station or a base station cell of the RRC message sent by the bearer channel and a type of the RRC message, or is used to indicate a type of the RRC message sent by the bearer channel.

157. The base station of claim 156, wherein the indication information comprises one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

158. A base station, comprising:

the transceiver is used for receiving an RRC message or an RRC message processing data packet sent by the first base station, wherein the RRC message or the RRC message processing data packet is generated by the first base station; and

and sending the RRC message to the terminal through a bearer channel for forwarding the RRC message generated by the first base station.

159. The method of claim 158, comprising:

a transceiver, configured to receive a random access response message or a random access response message processing data packet sent by a first base station, where the random access response message or the random access response message processing data packet is generated by the first base station; and

and sending the random access response message to the terminal through a bearer channel used by the second base station for forwarding the random access response message generated by the first base station.

160. The base station of claim 159, wherein the random access response message carries indication information, and the indication information is used to indicate a bearer channel for sending feedback information of the random access response message, or the indication information is used to indicate a base station and/or base station cell information for receiving the feedback information of the random access response message.

161. The base station of claim 158, wherein the RRC message carries information identifying a base station and/or a base station cell that generated the RRC message.

162. The base station of claim 161, wherein the information identifying the base station and/or base station cell generating the RRC message is an identification of a base station and/or base station cell; or

163. The base station of claim 158, wherein the RRC message carries indication information, and wherein the indication information is used for indicating a bearer channel for sending the feedback information of the RRC message, or wherein the indication information is used for indicating a base station and/or base station cell information for receiving the feedback information of the RRC message.

164. The base station of claim 158, wherein the transceiver is further configured to receive feedback information of an RRC message sent by a terminal, and the feedback information of the RRC message carries indication information and/or a transmission identifier.

165. The base station of claim 164, wherein the indication information indicates one of:

166. The base station of claim 164, wherein the transmission identity carried in the feedback information of the RRC message is the same as the transmission identity carried in the RRC message.

167. The base station of claim 158, wherein the transceiver to forward a bearer channel of the RRC message generated by the first base station or the RRC message handling packet comprises: PDCP entity unit, RLC entity unit, MAC entity unit and physical layer unit; or comprises the following steps: an RLC entity unit, an MAC entity unit and a physical layer unit.

168. The base station as claimed in any of claims 158 and 167, wherein the transceiver is further configured to send configuration information of a bearer channel for sending an RRC message and/or an RRC message handling data packet to the terminal; wherein the configuration information of the bearer channel includes: and the base station and/or other base stations which send the configuration information are used for sending RRC messages and/or the configuration information of the bearer channel of the RRC message processing data packet.

169. The base station of claim 168, wherein the configuration information of the bearer channel comprises one or a combination of: PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel ID, logical channel configuration, MAC entity unit information, physical layer entity unit information, channel information of the physical layer.

170. The method of claim 168, wherein the transceiver sends indication information corresponding to configuration information of the bearer channel to a terminal, the indication information indicating a generating base station or a base station cell of the RRC message sent by the bearer channel, or indicating a type of the generating base station or the base station cell and the RRC message of the RRC message sent by the bearer channel, or indicating a type of the RRC message sent by the bearer channel.

171. The base station of claim 170, wherein the indication information comprises one of;

SRB identification information corresponding to the bearer channel;

carrying identification information of the channel;

identification information of a base station or a base station cell;

logical channel identification information.

172. A method for configuring Radio Bearer (RB) channels, comprising:

the first base station sends an RRC message transmission configuration request message to the second base station, wherein the RRC message transmission configuration request message is used for requesting the second base station to establish a bearer channel for forwarding the RRC message or the RRC message processing data packet generated by the first base station.

173. The method of claim 172, wherein the step of requesting the second base station to establish a bearer path for forwarding the RRC message generated by the first base station or the RRC message processing packet comprises:

the method is used for requesting the second base station to establish a bearer channel for forwarding the RRC message or RRC message processing data packet generated by the signaling radio bearer of the first base station.

174. The method of claim 172, wherein the RRC message transmission configuration request message carries one or a combination of the following information:

175. The method of claim 174, wherein the expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

176. The method of claim 174, wherein the expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information, RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

177. The method of claim 174, wherein the configuration information of the bearer channel comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

178. The method of claim 172, wherein the RRC message transmission configuration request message carries indication information, and wherein the indication information indicates that a bearer path for requesting the second base station to establish for forwarding the RRC message generated by the first base station or the RRC message handling packet is, at the second base station: the combination of the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station, or the combination of the PDCP entity unit, the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station.

179. The method of claim 172, wherein the RRC message transmission configuration request message comprises: interface information between the first base station and the second base station, wherein the interface information is interface information of an interface between the base stations corresponding to a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, at the side of the first base station.

180. The method of claim 172, wherein after the first base station sends the RRC message transmission configuration request message to the second base station, further comprising:

and the first base station receives a confirmation message which is returned by the second base station and corresponds to the RRC message transmission configuration request message.

181. The method of claim 180, wherein the acknowledgement message comprises: and interface information between the second base station and the first base station, wherein the interface information is interface information of an interface between the base stations corresponding to a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, at the second base station side.

182. The method of claim 179, wherein the interface information comprises one or a combination of:

GTP pipeline end point information and/or transport layer address information;

channel information between the RRC entity unit and the PDCP entity unit;

channel information between the PDCP entity unit and the RLC entity unit.

183. The method according to claim 180, wherein the acknowledgement message includes bearer path configuration information of the second station, and/or configuration information of a bearer path for which the second base station forwards the RRC message generated by the first base station or the RRC message handling packet.

184. The method of claim 183, wherein the configuration information of the bearer channel comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

185. The method of claim 183, wherein the second base station forwarding configuration information of a bearer path for RRC message generated by the first base station or RRC message handling packet comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information and physical layer unit information.

186. The method of claim 180, wherein after the first base station receives the acknowledgement message corresponding to the RRC message transmission configuration request message returned by the second base station, the method further comprises:

the first base station sends configuration information of a bearer channel for transmitting RRC messages to the terminal, wherein the configuration information of the bearer channel comprises one or the combination of the following:

187. The method of claim 172, wherein the second base station established by the second base station forwards the RRC message generated by the first base station or the bearer path of the RRC message handling packet, comprising: PDCP entity unit, RLC entity unit, MAC entity unit, physical layer entity unit; or, the RLC entity unit, the MAC entity unit, and the physical layer entity unit, wherein a bearer channel formed by the RLC entity unit, the MAC entity unit, and the physical layer entity unit, and the PDCP entity unit in the bearer channel in which the first base station sends the RRC message generated by the first base station or the independent PDCP entity unit provides a service for the terminal.

188. The method of claim 172, wherein after the first base station sends the RRC message transmission configuration request message to the second base station, further comprising:

and the first base station receives the configuration completion information of the bearer channel returned by the second base station.

189. The method of claim 186, further comprising:

the first base station sends indication information to the terminal, wherein the indication information is used for triggering the terminal to use a bearer channel which is used by the first base station and/or the second base station for transmitting RRC messages or RRC processing message data packets to receive or send data.

190. The method of claim 186, further comprising:

the first base station receives the indication information sent by the terminal and/or the indication information forwarded by the second base station, and receives or sends data facing the terminal by using a bearer channel used by the first base station and/or the second base station for transmitting an RRC message or an RRC message processing data packet.

191. The method of claim 188, wherein the indication information comprises: the RRC layer indication information of the first base station, the MAC layer control command and the physical layer command are combined.

192. The method of claim 186, further comprising:

the first base station transmits auxiliary information to the terminal, wherein the auxiliary information comprises C-RNTI and/or timing advance information aiming at a second base station cell.

193. The method of claim 172, wherein the first base station sends an RRC message transmission configuration request message to the second base station, comprising:

and the first base station sends the RRC message transmission configuration request message to a terminal and instructs the terminal to send the RRC message transmission configuration request message to a second base station.

194. The method of claim 172, wherein prior to the first base station sending the RRC message transmission configuration request message to the second base station, comprising:

the first base station receives a first request message sent by a second base station, wherein the first request message is used for requesting the first base station to send an RRC message transmission configuration request message to the second base station.

195. The method of claim 172, further comprising:

the first base station sends an RRC message transmission configuration modification message to the second base station, wherein the RRC message transmission configuration modification message is used for requesting the second base station to modify a bearer channel of the second base station for forwarding the RRC message or the RRC message processing data packet generated by the first base station, and/or is used for notifying the second base station that the configuration information of the bearer channel of the first base station is modified.

196. The method of claim 195, wherein the RRC message transmission configuration modification message carries configuration information of a bearer channel that the first base station desires to be modified by the second base station, and wherein the configuration information of the bearer channel that the first base station desires to be modified by the second base station comprises: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

197. The method of claim 195, wherein the RRC message transmission configuration modification message is used to notify the second base station that the configuration information of the bearer channel of the first base station is modified, and wherein the RRC message transmission configuration modification message carries the configuration information of the bearer channel modified by the first base station.

198. The method of claim 197, wherein the RRC message transmits configuration information of the bearer channel modified by the first base station carried in a configuration modification message, comprising: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

199. The method of claim 195, wherein after the first base station sends the RRC message transmission configuration modification message to the second base station, further comprising:

and the first base station receives a confirmation message which is returned by the second base station and corresponds to the RRC message transmission configuration modification message.

200. The method of claim 199, wherein the acknowledgement message comprises: and the second base station modified by the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

201. The method of claim 199, further comprising:

and the first base station transmits the configuration information of the bearer channel of the RRC message or RRC message processing data packet generated by the first base station to the terminal, wherein the RRC message or the configuration information of the bearer channel is transmitted by the second base station after the modification of the second base station.

202. The method of claim 201, wherein after the first base station sends, to the terminal, the configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing packet modified by the second base station, further comprising:

and the first base station receives configuration completion information or configuration failure information of the bearer channel sent by the terminal.

203. The method of claim 195, wherein prior to the first base station sending the RRC message transmission configuration modification message to the second base station, further comprising:

and the first base station receives a second request message sent by the second base station, wherein the second request message is used for requesting the first base station to send an RRC message transmission configuration modification message to the second base station.

204. The method of claim 203, wherein the configuration completion information is RRC reconfiguration complete information indicating completion of modification of a bearer channel; or, the configuration completion information is MACCE, and is used to indicate that modification of the bearer channel is completed.

205. The method of claim 172, further comprising:

the first base station sends an RRC message transmission configuration release message to the second base station, wherein the RRC message transmission configuration release message is used for requesting the second base station to release a bearer channel for the second base station to forward the RRC message generated by the first base station or an RRC message processing data packet, and/or is used for informing the second base station that the first base station releases the bearer channel for sending the RRC message.

206. The method of claim 205, wherein after the first base station sends the RRC message transmission configuration release message to the second base station, further comprising:

and the first base station receives a confirmation message which is returned by the second base station and corresponds to the RRC message transmission configuration release message.

207. The method of claim 172, further comprising:

and the first base station releases the first base station, and the second base station forwards the RRC message generated by the first base station or the bearing channel of the RRC message processing data packet.

208. The method of claim 205, wherein after the first base station sends the RRC message transmission configuration release message to the second base station, further comprising:

the first base station sends RRC message transmission configuration release message to the terminal, and the RRC message transmission configuration release message is used for informing the terminal of the release condition of the bearer channel for sending the RRC message.

209. The method of claim 208, wherein after the first base station sends the RRC message transmission configuration request message to the terminal, further comprising:

and the first base station receives bearer channel release completion information or failure information sent by the terminal.

210. The method of claim 209, wherein the configuration completion information is RRC reconfiguration complete information for indicating that the release of the bearer channel for the first base station and/or the second base station to send the RRC message is complete; or, the configuration completion information is MACCE, and is used to indicate that the first base station and/or the second base station completes the release of the bearer tunnel for sending the RRC message.

211. The method of any of claims 172-210 wherein the RRC message handling data packet comprises one of:

SDU data packet of RRC message in PDCP layer;

a PDU data packet of an RRC message at a PDCP layer;

SDU data packet of RRC message in RLC layer;

PDU data packet of RRC message in RLC layer;

SDU data packet of MAC layer;

PDU packet of MAC layer.

212. A method for configuring Radio Bearer (RB) channels, comprising:

the second base station receives a configuration request message of an RRC message transmission channel sent by the first base station;

and the second base station establishes a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the configuration request message of the RRC message transmission channel.

213. The method of claim 212, wherein the step of requesting the second base station to establish a bearer path for forwarding the RRC message generated by the first base station or the RRC message processing packet comprises:

214. The method of claim 212, wherein the RRC message transmission configuration request message carries one or a combination of the following information:

215. The method of claim 214, wherein expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

216. The method of claim 214, wherein expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information, RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

217. The method of claim 214, wherein the configuration information of the bearer channel comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

218. The method of claim 212, wherein the RRC message transmission configuration request message carries indication information, and wherein the indication information indicates that a bearer path for requesting the second base station to establish for forwarding the RRC message generated by the first base station or the RRC message handling packet is, at the second base station: the combination of the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station, or the combination of the PDCP entity unit, the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station.

219. The method of claim 212, wherein the RRC message transmission configuration request message comprises: interface information between the first base station and the second base station, wherein the interface information is interface information of an interface between the base stations corresponding to a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, at the side of the first base station.

220. The method of claim 212, wherein after the second base station establishes the bearer path for the second base station to forward the RRC message or the RRC message processing packet generated by the first base station, or after the second base station receives the configuration request message of the RRC message transmission path sent by the first base station, further comprising:

and the second base station sends a confirmation message corresponding to the RRC message transmission configuration request message to the first base station.

221. The method of claim 220, wherein the acknowledgement message comprises: and interface information between the second base station and the first base station, wherein the interface information is interface information of an interface between the base stations corresponding to a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet, at the second base station side.

222. The method of claim 219, wherein the interface information includes one or a combination of:

GTP pipeline end point information and/or transport layer address information;

channel information between the RRC entity unit and the PDCP entity unit;

channel information between the PDCP entity unit and the RLC entity unit.

223. The method of claim 221, wherein the acknowledgement message includes bearer channel configuration information of the second station, and/or configuration information of a bearer channel for which the second station forwards the RRC message generated by the first base station or the RRC message handling packet.

224. The method of claim 223, wherein the configuration information of the bearer channel comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

225. The method of claim 223, wherein the second base station forwarding the RRC message generated by the first base station or the configuration information of the bearer path of the RRC message handling packet comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information and physical layer unit information.

226. The method of claim 220, wherein after the second base station sends an acknowledgement message corresponding to the RRC message transmission configuration request message to the first base station, further comprising:

the second base station sends configuration information of a bearer channel for transmitting the RRC message to the terminal, wherein the configuration information of the bearer channel comprises one or the combination of the following:

227. The method of claim 212, wherein the second base station established by the second base station forwards the RRC message generated by the first base station or the bearer path of the RRC message handling packet, comprising: PDCP entity unit, RLC entity unit, MAC entity unit, physical layer entity unit; or, the RLC entity unit, the MAC entity unit, and the physical layer entity unit, wherein a bearer channel formed by the RLC entity unit, the MAC entity unit, and the physical layer entity unit, and the PDCP entity unit in the bearer channel in which the first base station sends the RRC message generated by the first base station or the independent PDCP entity unit provides a service for the terminal.

228. The method of claim 212, wherein after establishing the bearer path for the second base station to forward the RRC message generated by the first base station or the RRC message handling packet, further comprising:

and the second base station returns the configuration completion information of the bearer channel to the first base station.

229. The method of claim 226, further comprising:

and the second base station sends indication information to the terminal, wherein the indication information is used for triggering the terminal to use a bearer channel which is used by the first base station and/or the second base station for transmitting RRC messages or RRC messages for processing data packets to receive or send data.

230. The method of claim 226, further comprising:

and the second base station receives the indication information sent by the terminal, and receives or sends data facing the terminal by using a bearer channel which is used for transmitting the RRC message or processing the data packet by the RRC message and/or the second base station.

231. The method of claim 230, wherein the second base station receives indication information sent by the terminal, and receives or sends data to the terminal using a bearer channel used by the first base station and/or the second base station for transmitting RRC messages or RRC message handling data packets, comprising:

and the second base station sends the corresponding meaning of the indication information sent by the receiving terminal to the first base station, and triggers the first base station to receive or send data facing the terminal by using a bearing channel which is used for transmitting RRC (radio resource control) messages or RRC message processing data packets and/or used by the first base station and/or the second base station.

232. The method of claim 228, wherein the indication information comprises: and the RRC layer indication information, the MAC layer control command and the physical layer command of the second base station are combined.

233. The method of claim 226, further comprising:

and the second base station sends auxiliary information to the terminal, wherein the auxiliary information comprises C-RNTI and/or timing advance information aiming at the cell of the second base station.

234. The method of claim 212, wherein the second base station receiving the RRC message transmission configuration request message sent by the first base station comprises:

the second base station receives the RRC message transmission configuration request message forwarded by the terminal; and the first base station transmits the RRC message transmission configuration request message to a terminal and instructs the terminal to transmit the RRC message transmission configuration request message to a second base station.

235. The method of claim 212, wherein the second base station, prior to receiving the RRC message transmission configuration request message sent by the first base station, comprises:

and the second base station sends a first request message to the first base station, wherein the first request message is used for requesting the first base station to send an RRC message transmission configuration request message to the second base station.

236. The method of claim 212, further comprising:

the second base station receives an RRC message transmission configuration modification message sent by the first base station, wherein the RRC message transmission configuration modification message is used for requesting the second base station to modify a bearer channel of the RRC message or the RRC message processing data packet generated by the second base station and forwarded by the first base station, and/or is used for notifying the second base station that the configuration information of the bearer channel of the first base station is modified;

and the second base station transmits a configuration modification message according to the RRC message, and modifies a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message to process the data packet.

237. The method of claim 236, wherein the RRC message transmission configuration modification message carries configuration information of a bearer channel that the first base station desires to be modified by the second base station, and wherein the configuration information of the bearer channel that the first base station desires to be modified by the second base station comprises: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

238. The method of claim 236, wherein the RRC message transmission configuration modification message is used to notify the second base station that the configuration information of the bearer channel of the first base station is modified, and wherein the configuration information of the bearer channel modified by the first base station is carried in the RRC message transmission configuration modification message.

239. The method of claim 238, wherein the RRC message transmits configuration information of the bearer channel modified by the first base station carried in a configuration modification message, comprising: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

240. The method of claim 236, wherein the second base station, after receiving the RRC message transmission configuration modification message sent by the first base station, further comprises:

and the second base station returns a confirmation message corresponding to the RRC message transmission configuration modification message to the first base station.

241. The method of claim 240, wherein the acknowledgement message comprises: and the second base station modified by the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

242. The method of claim 236, further comprising:

and the second base station transmits the configuration information of the bearer channel of the RRC message processing data packet generated by the first base station or the RRC message to the terminal after the second base station is modified.

243. The method of claim 242, wherein after the second base station sends the configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet to the terminal after the modification of the second base station, the method further comprises:

and the second base station receives the configuration completion information or the configuration failure information of the bearer channel sent by the terminal.

244. The method of claim 236, wherein prior to the second base station receiving the RRC message transmission configuration modification message sent by the first base station, further comprising:

and the second request message is used for requesting the first base station to send an RRC message transmission configuration modification message to the second base station.

245. The method of claim 244, wherein the configuration completion information is an RRC reconfiguration complete information indicating completion of modification of a bearer channel; or, the configuration completion information is MACCE, and is used to indicate that modification of the bearer channel is completed.

246. The method of claim 212, further comprising:

the second base station receives an RRC message transmission configuration release message sent by the first base station, wherein the RRC message transmission configuration release message is used for requesting the second base station to release a bearer channel for the second base station to forward an RRC message generated by the first base station or an RRC message processing data packet, and/or is used for informing the second base station that the first base station releases the bearer channel for sending the RRC message;

and the second base station transmits a configuration release message according to the RRC message, and releases a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message to process the data packet.

247. The method of claim 246, wherein after the second base station receives the RRC message transmission configuration release message sent by the first base station, further comprising:

and the second base station sends a confirmation message corresponding to the RRC message transmission configuration release message to the first base station.

248. The method of claim 212, further comprising:

and the second base station releases the second base station, and the first base station forwards the RRC message generated by the second base station or the bearing channel of the RRC message processing data packet.

249. The method of claim 246, wherein after the second base station releases the bearer path for the second base station to forward the RRC message generated by the first base station or the RRC message handling data packet, further comprising:

and the second base station sends an RRC message transmission configuration release message to the terminal, and the RRC message transmission configuration release message is used for informing the terminal of the release condition of the bearer channel for sending the RRC message.

250. The method of claim 249, wherein after the second base station transmits the RRC message transmission configuration request message to the terminal, further comprising:

and the second base station receives bearer channel release completion information or failure information sent by the terminal.

251. The method of claim 250, wherein the configuration completion information is RRC reconfiguration complete information for indicating that the release of the bearer channel for the first base station and/or the second base station to send the RRC message is complete; or, the configuration completion information is MACCE, and is used to indicate that the first base station and/or the second base station completes the release of the bearer tunnel for sending the RRC message.

252. The method as claimed in any one of claims 212-251, wherein the RRC message handling data packet comprises one of:

SDU data packet of RRC message in PDCP layer;

a PDU data packet of an RRC message at a PDCP layer;

SDU data packet of RRC message in RLC layer;

PDU data packet of RRC message in RLC layer;

SDU data packet of MAC layer;

PDU packet of MAC layer.

253. A base station, comprising:

the processor is used for generating an RRC message transmission configuration request message, the RRC message transmission configuration request message is used for requesting a second base station to establish a bearer channel for forwarding an RRC message generated by a first base station or processing a data packet by the RRC message, and the first base station is the local base station;

and the transceiver is used for sending the RRC message transmission configuration request message generated by the processor to the second base station.

254. The base station of claim 253, wherein the RRC message transmission configuration request message carries one or a combination of the following information:

255. The base station of claim 254, wherein the expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

256. The base station of claim 254, wherein the expecting the second base station to establish bearer path configuration information for the second base station to forward the RRC message generated by the first base station comprises: PDCP layer configuration information, RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

257. The base station of claim 254, wherein the bearer channel configuration information comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

258. The base station of claim 253, wherein the RRC message transmission configuration request message carries indication information, and wherein the indication information indicates that a bearer path for requesting the second base station to establish for forwarding the RRC message generated by the first base station or the RRC message handling packet is, at the second base station: the combination of the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station, or the combination of the PDCP entity unit, the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station.

259. The base station of claim 253, wherein the transceiver is further configured to receive an acknowledgement message returned by the second base station corresponding to the RRC message transmission configuration request message.

260. The base station of claim 259, wherein the acknowledgement message received by the transceiver includes bearer path configuration information of the second station, and/or configuration information of a bearer path for which the second station forwards an RRC message generated by the first base station or an RRC message handling packet.

261. The base station of claim 259, wherein the transceiver is further configured to send, after receiving an acknowledgement message corresponding to the RRC message transmission configuration request message returned by the second base station, configuration information of a bearer channel for transmitting an RRC message to the terminal, where the bearer channel configuration information includes one or a combination of the following:

262. The base station of claim 253, wherein the processor is further configured to generate an RRC message transmission configuration modification message requesting the second base station to modify a bearer path of the second base station for forwarding the RRC message generated by the first base station or the RRC message handling packet, and/or to notify the second base station that the configuration information of the bearer path of the first base station is modified;

the transceiver is further configured to send the RRC message transmission configuration modification message generated by the processor to a second base station.

263. The base station of claim 262, wherein the RRC message transmission configuration modification message carries configuration information of a bearer channel that the first base station desires to be modified by the second base station, and wherein the configuration information of the bearer channel that the first base station desires to be modified by the second base station comprises: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

264. The base station of claim 262, wherein the transceiver is further configured to receive an acknowledgement message corresponding to the RRC message transmission configuration modification message returned by the second base station after sending the RRC message transmission configuration modification message to the second base station; the confirmation message includes: and the second base station modified by the second base station forwards the RRC message generated by the first base station or the configuration information of the bearer channel of the RRC message processing data packet.

265. The base station of claim 262, wherein the transceiver is further configured to send the configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message handling data packet to the terminal after modification by the second base station.

266. The base station of claim 253, wherein the processor is further configured to generate an RRC message transmission configuration release message requesting the second base station to release a bearer path for the second base station to forward the RRC message generated by the first base station or the RRC message handling data packet, and/or to notify the second base station that the first base station has released the bearer path for sending the RRC message;

the transceiver is further configured to send the RRC message transmission configuration release message generated by the processor to the second base station.

267. The base station of claim 266, wherein the processor is further configured to send an RRC message transmission configuration request message to the terminal for notifying the terminal of a release of a bearer channel for sending the RRC message, after the transceiver sends the RRC message transmission configuration release message to the second base station.

268. A base station, comprising:

the transceiver is used for receiving a configuration request message of an RRC message transmission channel sent by a first base station;

and the processor is used for establishing a bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet according to the configuration request message of the RRC message transmission channel received by the transceiver, wherein the second base station is the local base station.

269. The base station of claim 268, wherein the RRC message transmission configuration request message carries one or a combination of the following information:

270. The base station of claim 269, wherein said expecting the second base station to establish bearer path configuration information for the second base station to forward RRC messages generated by the first base station comprises: PDCP layer configuration information of the first base station, and/or RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

271. The base station of claim 269, wherein said expecting the second base station to establish bearer path configuration information for the second base station to forward RRC messages generated by the first base station comprises: PDCP layer configuration information, RLC layer configuration information, MAC layer configuration information, physical layer configuration information of the second base station.

272. The base station of claim 269, wherein the configuration information for the bearer channel comprises: at least one parameter configuration information of PDCP entity unit information, RLC entity unit information, channel identification between PDCP and RLC, channel configuration information between PDCP and RLC, logical channel identification, logical channel configuration information, MAC entity unit information, and physical layer unit information.

273. The base station of claim 268, wherein the RRC message transmission configuration request message carries indication information, and the indication information indicates that a bearer path for requesting the second base station to establish for forwarding the RRC message generated by the first base station or the RRC message handling packet is, at the second base station: the combination of the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station, or the combination of the PDCP entity unit, the RLC entity unit, the MAC entity unit and the physical layer entity unit of the second base station.

274. The base station of claim 268, wherein the processor is further configured to generate a confirmation message corresponding to the RRC message transmission configuration request message after establishing a bearer path for the second base station to forward the RRC message generated by the first base station or the RRC message processing data packet;

the transceiver is further configured to send the processor-generated acknowledgement message to the first base station.

275. The base station of claim 274, wherein the acknowledgement message comprises configuration information of a bearer path of the second station, and/or configuration information of a bearer path for which the second station forwards an RRC message generated by the first base station or an RRC message handling packet;

276. The base station of claim 274, wherein the processor is further configured to generate configuration information for a bearer path used for transmission of the RRC message after sending an acknowledgement message corresponding to the RRC message transmission configuration request message to the first base station, the bearer path configuration information comprising one or a combination of:

277. The base station of claim 268, wherein the transceiver is further configured to receive an RRC message transmission configuration modification message sent by the first base station, wherein the RRC message transmission configuration modification message is used to request the second base station to modify a bearer channel of the second base station for forwarding an RRC message generated by the first base station or an RRC message processing packet, and/or to notify the second base station that configuration information of the bearer channel of the first base station is modified;

the processor is further configured to modify, according to the RRC message transmission configuration modification message, a bearer path through which the second base station forwards an RRC message generated by the first base station or an RRC message processing data packet.

278. The base station of claim 277, wherein the RRC message transmission configuration modification message carries configuration information of bearers that the first base station desires to be modified by the second base station, and wherein the configuration information of bearers that the first base station desires to be modified by the second base station comprises: the parameter configuration information of at least one of PDCP entity unit information, RLC entity unit information, a channel identifier between PDCP and RLC, channel configuration information between PDCP and RLC, a logical channel identifier, logical channel configuration information, MAC entity unit information, and physical layer unit information.

279. The base station of claim 277, wherein the processor is further configured to generate an acknowledgement message corresponding to the RRC message transmission configuration modification message after the transceiver receives the RRC message transmission configuration modification message sent by the first base station;

the transceiver is further configured to return the acknowledgement message generated by the processor to the first base station.

280. The base station of claim 277, wherein the transceiver is further configured to send the modified configuration information of the bearer channel for the second base station to forward the RRC message generated by the first base station or the RRC message handling packet to the terminal.

281. The base station of claim 268, wherein the transceiver is further configured to receive an RRC message transmission configuration release message sent by the first base station, wherein the RRC message transmission configuration release message is used to request the second base station to release a bearer channel for the second base station to forward an RRC message generated by the first base station or an RRC message processing packet, and/or is used to notify the second base station that the bearer channel for sending the RRC message is released by the first base station;

the processor is further configured to release the bearer channel through which the second base station forwards the RRC message generated by the first base station or the RRC message processing data packet, according to the RRC message transmission configuration release message.

282. The base station of claim 281, wherein the transceiver is further configured to send an RRC message transmission configuration request message to the terminal after the processor forwards, to the second base station, the bearer channel of the RRC message processing packet or the RRC message generated by the first base station, so as to notify the terminal of the release condition of the bearer channel used for sending the RRC message.