CN111224758B

CN111224758B - Repeated transmission indication method, base station and terminal

Info

Publication number: CN111224758B
Application number: CN201811409066.0A
Authority: CN
Inventors: 谌丽; 刘佳敏; 皮埃尔
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2022-04-05
Anticipated expiration: 2038-11-23
Also published as: CN111224758A

Abstract

The invention provides a repeated transmission indicating method, a base station and a terminal, which solve the problem of how to activate repeated transmission under the condition that the terminal is simultaneously configured with dual-connection DC repeated transmission and CA repeated transmission. The method of the invention comprises the following steps: generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, and the target cell group is a cell group corresponding to a terminal; and sending the first MAC control unit information to the terminal. The embodiment of the invention can effectively activate the repeated transmission through a smaller signaling overhead, namely the 1-byte first MAC control unit, can effectively save the signaling resource activation and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

Description

Repeated transmission indication method, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a terminal for indicating retransmission.

Background

A 5G New Radio (NR) system has relatively high requirements for low-latency and high-reliability services in terms of latency and reliability, and currently, a retransmission mechanism is introduced, that is, a Packet Data Convergence Protocol Data Unit (PDCP PDU) is transmitted through multiple paths, where the same PDU is transmitted through multiple paths, and the transmission reliability is improved and the transmission latency is reduced by using multiple transmission gains.

In the NR Rel-15 stage, only two paths of repeated transmission are supported to be configured, that is, a PDCP entity corresponding to one Radio Bearer (RB) is mapped to two Radio Link Control (RLC) entities, and only Dual Connectivity (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission is implemented through two configured paths.

In the subsequent development of NR, such as Rel-16 and later, it is considered to introduce a RB with a repetition transmission configuration corresponding to more than 2 RLC entities and logical channels, in which case, CA repetition transmission and DC repetition transmission can be configured at the same time, i.e. whether CA repetition transmission or DC repetition transmission is performed can be selected. And in case that one RB corresponds to a duplicate transmission configuration of more than 2 RLC entities and logical channels, the actually activated duplicate transmission path is not necessarily more than 2, i.e. the actually activated transmission path is still 1 or 2. The existing MAC Control Element (CE) for activating/deactivating retransmission can only simply activate or deactivate retransmission of an RB, and cannot accurately control the case where one RB is configured with more than 2 RLC entities, and it may not satisfy the requirements of delay and reliability of service transmission because all retransmission paths are always activated when unnecessary.

An alternative scheme is to activate and deactivate each configured path, that is, each RLC entity corresponding to one RB, respectively, but this design completely discards the existing repeated transmission activation/deactivation MAC CE on one hand, and on the other hand, the overhead of the MAC CE is large, for example, for 8 RBs (as in the design of NR Rel-15), if 4 RLC entities are configured for each RB, 8 × 4 ═ 32 bits are required for each RLC entity activation/deactivation, that is, at least 4 bytes are required, obviously, the signaling overhead is large, and when the bandwidth is small, data transmission resources are also affected because the signaling resource overhead occupies data transmission resources. Therefore, in the case of configuring CA duplicate transmission and DC duplicate transmission at the same time, how to activate duplicate transmission currently has no good implementation.

Disclosure of Invention

The embodiment of the invention provides a repeated transmission indication method, a base station and a terminal, which are used for solving the problem of how to activate repeated transmission under the condition that the terminal is simultaneously configured with double-connection DC repeated transmission and CA repeated transmission.

In order to achieve the above object, an embodiment of the present invention provides a method for indicating retransmission, which is applied to a base station, and includes:

generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal;

and sending the first MAC control unit information to a terminal.

The first MAC control unit information is indicated by a predetermined Logical Channel Identifier (LCID) in an MAC subheader, the length of the first MAC control unit information is a preset fixed byte, and each bit in the first MAC control unit information is used for indicating whether a target RB corresponding to the bit activates DC repeated transmission or CA repeated transmission.

Before sending the first MAC control element information to the terminal, the method further includes:

sending the RLC entity configuration information of the target RB in each target cell group to a terminal;

wherein the RLC entity configuration information comprises one or two RLC entities corresponding to the target RB in each target cell group and Component Carriers (CCs) which can be used by each RLC entity corresponding to the target RB when CA (radio access control) repeat transmission is activated;

and the base station specifies a default RLC entity for the target RB in one or two corresponding RLC entities in each target cell group.

Wherein when the first MAC control element information is used for indicating that the target RB is activated is DC repeated transmission;

after the first MAC control element information is sent to the terminal, the method further includes:

DC repeat transmission is performed by a default RLC entity of each of the target cell groups.

When the first MAC control unit information is used for indicating that the target RB is activated by CA repeated transmission, a first target cell group in a plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

performing CA repeated transmission through the two RLC entities configured in the first target cell group and the CCs corresponding to the two RLC entities respectively;

or, when the first MAC control element information is sent through a first target cell group, CA repeat transmission is performed through two RLC entities configured in the first target cell group and CCs corresponding to the two RLC entities, respectively; and when the first MAC control unit information is sent by the second target cell group, the repeated transmission of the target RB is deactivated, and the transmission is only carried out on one RLC entity configured in the second target cell group.

When the first MAC control unit information is used for indicating that the target RB is activated, CA repeated transmission is performed, and two RLC entities are respectively configured in a plurality of target cell groups;

and performing CA repeated transmission through two RLC entities corresponding to the target cell group for sending the first MAC control unit information and CCs corresponding to the two RLC entities respectively.

After generating the first MAC control element information, the method further includes:

sending second MAC control unit information to a terminal, wherein the second MAC control unit information is used for indicating the repeated transmission of a deactivated target RB;

wherein each bit in the second MAC control unit information is used for indicating a target RB corresponding to the bit to activate repeat transmission or deactivate repeat transmission.

a first base station corresponding to the master cell group informs a second base station corresponding to the auxiliary cell group of the transmission mode of the target RB;

or the second base station corresponding to the auxiliary cell group sends repeated transmission attribute information to the first base station corresponding to the main cell group, wherein the repeated transmission attribute information comprises whether CA repeated transmission is supported and/or whether DC repeated transmission is supported; the first base station determines a transmission mode of a target RB according to the repeated transmission attribute information and informs the second base station;

or the second base station corresponding to the auxiliary cell group determines the transmission mode of the target radio bearer RB and informs the first base station corresponding to the main cell group;

wherein the transmission mode includes no repeat transmission, CA repeat transmission or DC repeat transmission.

In order to achieve the above object, an embodiment of the present invention further provides a method for indicating retransmission, which is applied to a terminal and includes:

receiving first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal;

and transmitting the target RB according to the first MAC control unit information.

Before receiving the first MAC control element information, the method further includes:

acquiring RLC entity configuration information of the target RB in each target cell group;

Wherein the transmitting the target RB according to the first MAC control element information comprises:

performing DC repeat transmission through a default RLC entity of each of the target cell groups when the first MAC control element information indicates that the target RB is activated for DC repeat transmission.

The first target cell group in the plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and the second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

the transmitting the target RB according to the first MAC control element information includes:

in case that the first MAC control element information indicates that the target RB is activated by CA repeat transmission, the CA repeat transmission is carried out through two RLC entities configured by the first target cell group and two CCs respectively corresponding to the RLC entities,

or, when the first MAC control element information is used to indicate that the target RB is activated by CA repeat transmission, when the first MAC control element information is sent by a first target cell group, CA repeat transmission is performed by two RLC entities configured by the first target cell group and CCs corresponding to the two RLC entities, respectively; and when the first MAC control unit information is sent by the second target cell group, the repeated transmission of the target RB is deactivated, and the transmission is only carried out on one RLC entity configured in the second target cell group.

Wherein, a plurality of the target cell groups are respectively configured with two RLC entities;

the performing the repeated transmission of the target RB according to the first MAC control element information includes:

when the first MAC control unit information is used for indicating that the target RB is activated and CA repeated transmission is performed, the CA repeated transmission is performed through two RLC entities corresponding to a target cell group for sending the first MAC control unit information and CCs corresponding to the two RLC entities respectively.

Wherein, the method further comprises:

receiving second MAC control unit information, wherein the second MAC control unit information is used for indicating the repeated transmission of a deactivated target RB;

and deactivating the repeated transmission of the target RB according to the second MAC control unit information, and sending the uplink data of the target RB on a default RLC entity corresponding to the target RB.

In order to achieve the above object, an embodiment of the present invention further provides a base station, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

and transmitting the first MAC control unit information to a terminal through a transceiver.

Wherein the processor, when executing the program, further implements the steps of:

the processor, when executing the program, further implements the steps of:

In order to achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the repeated transmission indication method applied to the base station as described above.

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

receiving first Media Access Control (MAC) control unit information through a transceiver, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal;

the processor, when executing the program, further implements the steps of:

In order to achieve the above object, an embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, which, when executed by a processor, implements the steps of the duplicate transmission indication method applied to a terminal as described above.

In order to achieve the above object, an embodiment of the present invention further provides a base station, including:

the generation module is used for generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeat transmission or Carrier Aggregation (CA) repeat transmission, one or two radio link layer control protocol (RLC) entities correspond to the target RB in each target cell group, and the target cell group is a cell group corresponding to the terminal;

and the first sending module is used for sending the first MAC control unit information to the terminal.

In order to achieve the above object, an embodiment of the present invention further provides a terminal, including:

a first receiving module, configured to receive first medium access control, MAC, control unit information, where the first MAC control unit information is used to indicate whether a target radio bearer RB is activated by dual-connectivity DC repeat transmission or carrier aggregation CA repeat transmission, and the target RB corresponds to one or two radio link layer control protocol RLC entities in each target cell group, where the target cell group is a cell group corresponding to the terminal;

and the first transmission module is used for transmitting the target RB according to the first MAC control unit information.

The embodiment of the invention has the beneficial effects that:

in the above embodiment of the present invention, first MAC control element information is generated, where the first MAC control element information is used to indicate whether a target radio bearer RB is activated by dual-connectivity DC repeat transmission or carrier aggregation CA repeat transmission, and the target RB corresponds to one or two RLC entities in each target cell group, where the target cell group is a cell group corresponding to the terminal; and sending the first MAC control unit information to a terminal. The embodiment of the invention can effectively activate the repeated transmission through smaller signaling overhead, namely 1byte of first MAC control unit information, can effectively save the signaling activation resource and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

Drawings

Fig. 1 is a schematic diagram of carrier aggregation repeat transmission;

FIG. 2 is a diagram of dual connectivity repeat transmission;

fig. 3 is a schematic diagram of a format of a MAC CE with repeated transmission activation/deactivation;

FIG. 4 is a diagram illustrating a format of a MAC subheader;

FIG. 5 is a second diagram illustrating the format of the MAC subheader;

FIG. 6 is a third diagram illustrating the format of the MAC subheader;

FIG. 7 is a diagram illustrating a format of a MAC PDU;

FIG. 8 is a flowchart illustrating a method for indicating retransmission according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a configuration of DC and CA repeat transmission in an embodiment of the present invention;

FIG. 10 is a schematic diagram of an interaction of a base station according to an embodiment of the present invention;

FIG. 11 is a second exemplary interaction diagram of a base station according to the present invention;

FIG. 12 is a third exemplary interaction diagram of a base station in accordance with an embodiment of the present invention;

FIG. 13 is a fourth exemplary diagram of a base station according to the present invention;

fig. 14 is a second flowchart illustrating a retransmission indication method according to an embodiment of the present invention;

fig. 15 is a block diagram of a base station according to an embodiment of the present invention;

FIG. 16 is a block diagram of a base station according to an embodiment of the present invention;

fig. 17 is a block diagram of a terminal in the embodiment of the present invention;

fig. 18 is a block diagram of a terminal according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In order to make those skilled in the art better understand the technical solutions of the embodiments of the present invention, the following description is made.

In the NR Rel-15 stage, only two paths of repeated transmissions are supported, that is, a PDCP entity corresponding to one Radio Bearer (RB) is mapped to two Radio Link Control (RLC) entities, a Carrier Aggregation repetition (CA) repeated transmission model is shown in fig. 1, and a Dual Connectivity (DC) repeated transmission model is shown in fig. 2.

Specifically, one radio bearer (corresponding to one PDCP entity) of the PDCP layer is transmitted through a plurality of logical channels (each corresponding to one RLC entity) in the RLC layer, respectively. For the CA model, multiple logical channels corresponding to a radio bearer that is repeatedly transmitted are processed by one MAC entity at the MAC layer, and data from different RLC logical channels are mapped to one or more carriers for transmission.

For the DC model, multiple logical channels corresponding to the repeatedly transmitted RBs are respectively mapped to different MAC entities, and data of different RLC logical channels are mapped to different carriers for transmission.

Under NR Rel-15, one RB corresponds to at most two logical channels. The MAC CE format for repeated transmission activation/deactivation is shown in fig. 3.

Each bit of the MAC CE corresponds to a Data Radio Bearer (DRB) configured with repeated transmission, if one bit is set to be 1, the repeated transmission of the DRB corresponding to the bit is activated, and a PDCP data packet can be transmitted on two logic channels corresponding to the configured repeated transmission; if one bit is set to be 0, the repeated transmission of the DRB corresponding to the bit is deactivated, and the PDCP data packet can be transmitted only on the main logic channel.

One MAC PDU includes one or more MAC sub-PDUs (MAC sub-PDUs), one MAC sub-PDU includes one MAC sub-header and 0 or 1 MAC payload part, which refers to a MAC control element MAC CE, a MAC service data unit MAC SDU, or padding. The repeated transmission activation/deactivation of the MAC CE is a MAC control unit. Each MAC CE or MAC SDU or padding requires a MAC subheader indication, and the LCID field in the MAC subheader is used to indicate the logical channel number corresponding to the MAC CE type or MAC SDU, for example, the LCID corresponding to the repeatedly transmitted activated/deactivated MAC CE in NR Rel-15 is 56.

The MAC subheader formats are shown in fig. 4, 5, and 6.

The length indication field L of FIG. 4 is 8 bits for indicating the MAC CE or MAC SDU corresponding to the payload portion length smaller than 2^8 bytes;

the length indication field L of FIG. 5 is 16 bits for indicating the MAC CE or MAC SDU corresponding to the payload portion length larger than 2^8 bytes;

fig. 6 does not have a length indication field for indicating a fixed length MAC CE or padding.

Fig. 7 is an example of an organized MAC PDU including a plurality of MAC sub-PDUs, e.g., MAC CE 1, MAC CE 2, and padding, where MAC CE 1 is a Fixed-length (Fixed-sized) MAC CE and MAC CE 2 is a Variable-sized (Variable-sized) MAC CE.

However, when the end configures dual-connection DC duplicate transmission and CA duplicate transmission at the same time, there is a problem that the service transmission delay and reliability cannot be satisfied when the duplicate transmission is activated only by activating/deactivating the MAC CE for the duplicate transmission.

Based on the above, an embodiment of the present invention provides a method for indicating retransmission, which is applied to a base station, and as shown in fig. 8, the method includes:

step 801: and generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by Dual Connectivity (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal.

Specifically, the terminal may correspond to two cell groups, which include a master cell group MCG and a secondary cell group SCG. The base station configures at most two RLC entities in each target cell group for the target RB, and can select CA repeated transmission or DC repeated transmission when transmitting.

The first MAC control element information is indicated by a predetermined logical channel identifier LCID in a MAC subheader, the length of the first MAC control element information is a preset fixed byte, and each bit in the first MAC control element information is used to indicate whether a target RB corresponding to the bit is activated for DC retransmission or CA retransmission.

In this embodiment of the present invention, the preset fixed byte may be specifically 1byte, that is, the first MAC control element information is a MAC CE with a fixed length, occupies 1byte, and has a format similar to that of a retransmission activation/deactivation MAC CE, but each bit is used to indicate whether a corresponding DRB is activated for DC retransmission or CA retransmission. If the bit is set to 1, the DC repeat transmission is activated, and if the bit is set to 0, the CA repeat transmission is activated.

Step 802: and sending the first MAC control unit information to a terminal.

Specifically, the first MAC control element information is included in a MAC PDU and transmitted to the terminal.

The repeated transmission indicating method of the embodiment of the invention sends first Media Access Control (MAC) control unit information to a terminal, wherein the first MAC control unit information is used for indicating whether target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, and the target cell group is a cell group corresponding to the terminal. The embodiment of the invention can effectively activate the repeated transmission through smaller signaling overhead, namely 1byte of first MAC control unit information, can effectively save the signaling activation resource and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

Further, before sending the first MAC control element information to the terminal, the method further includes:

In the embodiment of the invention, when configuring the RLC entity corresponding to each cell group CG, the base station respectively configures: a) a default RLC entity under each CG; b) each RLC entity corresponds to a different CC (Component Carrier) set when CA repeat transmission is activated.

Further, the base station may also configure a default RLC entity when repeated transmission is not used among several RLC entities corresponding to one RB.

As shown in fig. 9, the data radio bearer DRB is mapped to one PDCP entity, which may be located in the MCG or SCG; the PDCP entities correspond to RLC1 and RLC2 entities of CG1, and RLC3 and RLC4 entities of CG2, respectively; the MAC entities of CG1 and CG2 are MAC1 and MAC2 entities respectively; when CA repeat transmission is activated, data on RLC1 can only be transmitted on CC1 and CC2, data on RLC2 can only be transmitted on CC3 and CC4, RLC3 and RLC4, and so on.

Further, when the first MAC control element information indicates that the target RB is activated is DC repeated transmission;

In the embodiment of the present invention, when the DC repeat transmission is activated, the terminal performs the repeat transmission on the default RLC entity of each CG, without limiting the carrier corresponding to the default RLC entity.

Further, when the first MAC control element information is used to indicate that the target RB is activated by CA repeat transmission, and a first target cell group of the plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group of the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

and performing CA repeated transmission through the two RLC entities configured in the first target cell group and the CCs corresponding to the two RLC entities respectively.

Here, regardless of the CG on which the first MAC control element information is transmitted, it is used to instruct CA on the first target cell group to repeat transmission and restrict the RLC entity to transmit only on the configured corresponding carrier.

Here, the repeated transmission or the deactivated repeated transmission is performed only on the cell group transmitting the first MAC control element information, and if the first MAC control element information is transmitted through the second target cell group, it indicates that the repeated transmission of the RB is deactivated, and if the first MAC control element information is transmitted through the first target cell group, it indicates that the CA repeated transmission of the RB is activated on the first target cell group.

Further, when the first MAC control element information indicates that the target RB is activated, CA repeat transmission is performed, and two RLC entities are configured in each of the plurality of target cell groups;

Here, if the base station configures 2 RLC entities corresponding to the RB indicated by the first MAC CE on all the CGs, CA repeat transmission of the RB is activated on the CG transmitting the first MAC CE.

Further, the method for indicating retransmission according to the embodiment of the present invention, after generating the first MAC control element information, further includes:

The second MAC control element information may specifically be a repeated transmission activation/deactivation MAC CE in NR Rel-15. Here, the existing duplicate transmission activation/deactivation MAC CE of NR Rel-15 is used to completely deactivate the duplicate transmission of the designated RB, at this time, the data of the RB is transmitted only on a default RLC entity specified by a protocol or configured by a base station, a bit corresponding to the RB which needs to be deactivated in the duplicate transmission activation/deactivation MAC CE is set to 0, and bits corresponding to other RBs which still activate the duplicate transmission are set to 1.

It should be noted that, under the configuration of the present invention, the NR Rel-15 existing duplicate transmission activation/deactivation MAC CE cannot be used independently for activating duplicate transmission, because the RLC entity used after activating duplicate transmission cannot be determined, and can only be used for deactivating duplicate transmission. However, the first MAC CE of the present invention can be used independently for activating retransmission without cooperating with the retransmission activation/deactivation MAC CE, for example, corresponding to the DRB1, the retransmission activation/deactivation MAC CE indicates that the retransmission is deactivated at the time T1, and at the subsequent time T2, if the base station sends the first MAC CE to indicate the DRB1 to perform DC retransmission or CA retransmission, the terminal starts the corresponding retransmission of the indicated RB.

In the embodiment of the invention, the RLC entities activated in the repeated transmission are accurately controlled, so that the DC/CA repeated transmission is accurately controlled by interaction among base stations.

Based on this, before sending the first MAC control element information to the terminal, the method further includes:

and the first base station corresponding to the main cell group informs the second base station corresponding to the auxiliary cell group of the transmission mode of the target RB.

Specifically, the secondary cell group may be signaled through an Xn interface.

wherein the transmission mode includes no repeat transmission (deactivated repeat transmission), CA repeat transmission, or DC repeat transmission.

The repeated transmission indicating method of the embodiment of the invention generates first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether target Radio Bearer (RB) is activated by double-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, and the target cell group is a cell group corresponding to the terminal; and sending the first MAC control unit information to a terminal. The embodiment of the invention can effectively activate the repeated transmission through smaller signaling overhead, namely 1byte of first MAC control unit information, can effectively save the signaling activation resource and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

The repeated transmission indication method according to the embodiment of the present invention is described below with reference to specific embodiments.

The first embodiment is as follows: activating DC repeat transmission

A base station side:

step 1: the base station uses RRC signaling to carry out DC repeated transmission and CA repeated transmission configuration aiming at RB for the terminal, and the configuration content comprises: default RLC entities under a master cell group MCG and a secondary cell group SCG, and carrier limitation of each RLC entity under CA repeated transmission.

Optionally, the configuration content further includes: the default RLC entity at the time of the repeated transmission is deactivated.

Step 2: the base station transmits a first MAC CE to the terminal for activating DC repeat transmission of the designated RB.

And step 3: and the base station receives data transmission on default RLC entities corresponding to the designated RB in the MCG and the SCG.

A terminal side:

step 1: the terminal receives RRC signaling sent by the base station and determines DC repeated transmission and CA repeated transmission configuration aiming at the RB.

Step 2: and the terminal receives the first MAC CE transmitted by the base station side and activates the DC repeated transmission of the designated RB.

And step 3: and the terminal sends the repeated transmission of the RB on the default RLC entities of the MCG and the SCG corresponding to the RB and the limit carrier corresponding to the default RLC entities.

Example two: active CA repeat transmission 1

A base station side:

step 1: the base station uses RRC signaling to carry out DC repeated transmission and CA repeated transmission configuration aiming at RB for the terminal, and the configuration content comprises: default RLC entities under MCG and SCG, carrier limitation of each RLC entity under CA repeat transmission.

Optionally, the configuration content further includes: the default RLC entity at the time of the repeated transmission is deactivated. Wherein, the RB corresponds to one RLC entity on CG1(MCG or SCG) and two RLC entities on CG2(SCG or MCG).

Step 2: and the base station corresponding to the CG1 sends a first MAC CE to the terminal, the first MAC CE indicates that CA repeated transmission is activated for the RB, and the repeated transmission is deactivated (because only one RLC entity corresponds to the CG 1).

And step 3: the base station receives the uplink data transmission of the RB on the RLC entity corresponding to the RB at CG 1.

Alternatively, the first and second electrodes may be,

step 2': and the base station corresponding to the CG2 sends a first MAC CE to the terminal, and the first MAC CE indicates that CA repeated transmission is activated for the RB, so that two RLC entities on the CG2 are activated for CA repeated transmission.

Step 3': the base station receives the data transmission at the RLC entity corresponding to the designated RB at CG 2.

A terminal side:

step 1: the terminal receives RRC signaling transmitted by the base station, and determines DC repeated transmission and CA repeated transmission configuration for a specific RB.

Wherein, the RB corresponds to one RLC entity on CG1(MCG or SCG) and two RLC entities on CG2(SCG or MCG).

Step 2: and the terminal receives the first MAC CE transmitted by the base station side and determines that the first MAC CE indicates the activation of the CA repeated transmission of the designated RB. If the MAC CE is received at CG1, the duplicate transmission of the RB is deactivated, and if the MAC CE is received at CG2, the CA duplicate transmission at CG2 is activated.

And step 3: and the terminal sends the repeated transmission of the RB on the RLC entity corresponding to the RB and the limiting carrier corresponding to the RLC entity according to the repeated transmission activation instruction.

Example three: active CA repeat transmission 2

A base station side:

Step 2: the base station corresponding to CG1 or the base station corresponding to CG2 transmits a first MAC CE for indicating the activation of CA repeat transmission of the RB to the terminal.

And step 3: the base station receives the CA repeat transmission data of the RB transmitted by the terminal at CG 2.

A terminal side:

step 1: the terminal receives RRC signaling transmitted by the base station, and determines DC repeated transmission and CA repeated transmission configuration for a specific RB. Wherein, the RB corresponds to one RLC entity on CG1(MCG or SCG) and two RLC entities on CG2(SCG or MCG).

Step 2: the terminal receives the first MAC CE transmitted from the base station side, determines that the first MAC CE indicates activation of CA repeat transmission of the designated RB, and activates CA repeat transmission at CG 2.

Example four: deactivating duplicate transmissions

A base station side:

step 1: the base station transmits a second MAC CE to the terminal for instructing to deactivate the repeated transmission of the specific RB.

Step 2: and the base station receives the data transmission of the RB only on the default RLC entity corresponding to the RB.

A terminal side:

step 1: and the terminal receives the second MAC CE sent by the base station and determines to deactivate the repeated transmission of the specific RB.

Step 2: and the terminal only sends the uplink data transmission of the RB on a default RLC entity corresponding to the appointed RB.

Example five: interaction between base stations 1

As shown in fig. 10, includes:

step 1: the MCG determines a transmission mode, and the transmission mode comprises the following steps: no repetitive transmission, DC repetitive transmission or CA repetitive transmission is activated.

Step 2: the MCG informs the SCG of the determined transmission mode.

When the transmission method is CA repeat transmission, the SCG is also notified of which cell group CG the SCG performs repeat transmission. The specific notification mode is to adopt Xn interface signaling.

And step 3, the SCG or the MCG sends the first MAC CE or the second MAC CE to the terminal.

Example six: inter base station interaction 2

As shown in fig. 11, includes:

step 1, the SCG sends Xn interface signaling to the MCG to inform the MCG whether the current side supports CA repeated transmission and/or DC repeated transmission.

And step 2, the MCG determines a transmission mode and informs the SCG of the determined transmission mode.

Example seven: interaction between base stations 3

As shown in fig. 12, includes:

step 1, the SCG determines a transmission mode, which includes: no repetitive transmission, DC repetitive transmission or CA repetitive transmission is activated.

And step 2, the SCG informs the MCG of the determined transmission mode.

Specifically, the MCG is signaled through the Xn interface.

And 3, receiving the transmission mode determined by the SCG by the MCG.

And step 4, the SCG or the MCG sends the first MAC CE or the second MAC CE to the terminal.

Alternatively, as shown in fig. 13, step 3', the MCG rejects the transmission mode determined by the SCG.

The step 3 and the step 4 are optional implementations, the step 3' is another optional implementation, and one implementation may be selected in specific implementations.

The repeated transmission indicating method of the embodiment of the invention generates first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether target Radio Bearer (RB) is activated by double-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, and the target cell group is a cell group corresponding to the terminal; and sending the first MAC control unit information to a terminal. The embodiment of the invention can effectively activate the repeated transmission through a smaller signaling overhead, namely the 1-byte first MAC control unit, can effectively save the signaling resource activation and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

As shown in fig. 14, an embodiment of the present invention further provides a method for indicating retransmission, which is applied to a terminal and includes:

step 1401: receiving first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal.

Step 1402: and transmitting the target RB according to the first MAC control unit information.

Specifically, according to the first MAC control element information, the target RB is not subjected to the repetition transmission, is subjected to the CA repetition transmission, or is subjected to the DC repetition transmission.

The repeated transmission indicating method of the embodiment of the invention receives first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether target Radio Bearer (RB) is activated by double-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, and the target cell group is a cell group corresponding to the terminal; and transmitting the target RB according to the first MAC control unit information. The embodiment of the invention can effectively activate the repeated transmission through a smaller signaling overhead, namely the 1-byte first MAC control unit, can effectively save the signaling resource activation and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

Further, before receiving the first MAC control element information, the method further includes:

Further, the transmitting the target RB according to the first MAC control element information includes:

Furthermore, a first target cell group in a plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

Furthermore, two RLC entities are respectively configured in a plurality of target cell groups;

Further, the repeated transmission indication method according to the embodiment of the present invention further includes:

As shown in fig. 15, an embodiment of the present invention further provides a base station, which includes a memory 1520, a processor 1500, a transceiver 1510, a bus interface, and a computer program stored on the memory 1520 and operable on the processor 1500, wherein the processor 1500 is configured to read the program in the memory 1520 and execute the following processes:

In fig. 15, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1500 in performing operations.

Optionally, the first MAC control element information is indicated by a predetermined logical channel identifier LCID in a MAC subheader, the length of the first MAC control element information is a preset fixed byte, and each bit in the first MAC control element information is used to indicate whether a target RB corresponding to the bit is activated for DC retransmission or CA retransmission.

Optionally, the processor 1500 is further configured to read the program in the memory 1520, and perform the following steps:

Optionally, when the first MAC control element information is used to indicate that the target RB is activated is DC repeated transmission;

the processor 1500 is also configured to read a program in the memory 1520, and perform the following steps:

Optionally, when the first MAC control element information is used to indicate that the target RB is activated by CA repeat transmission, and a first target cell group of a plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group of the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

Optionally, when the first MAC control element information is used to indicate that the target RB is activated by CA repeat transmission and two RLC entities are respectively configured in the plurality of target cell groups;

The base station of the embodiment of the invention generates first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal; and sending the first MAC control unit information to a terminal. The embodiment of the invention can effectively activate the repeated transmission through a smaller signaling overhead, namely the 1-byte first MAC control unit, can effectively save the signaling resource activation and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

In some embodiments of the invention, there is also provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal; and sending the first MAC control unit information to a terminal.

When executed by the processor, the program can implement all the implementation manners in the method embodiment applied to the base station side, and is not described herein again to avoid repetition.

As shown in fig. 16, an embodiment of the present invention further provides a base station, including:

a generating module 1601, configured to generate first MAC control element information, where the first MAC control element information is used to indicate whether a target radio bearer RB is activated by dual connectivity DC repeat transmission or carrier aggregation CA repeat transmission, and the target RB corresponds to one or two RLC entities in each target cell group, where the target cell group is a cell group corresponding to the terminal;

a first sending module 1602, sending the first MAC control element information to the terminal.

In the base station of the embodiment of the present invention, the first MAC control element information is indicated by a predetermined logical channel identifier LCID in an MAC subheader, the length of the first MAC control element information is a preset fixed byte, and each bit in the first MAC control element information is used to indicate whether a target RB corresponding to the bit is activated for DC retransmission or CA retransmission.

The base station of the embodiment of the invention further comprises:

a configuration module, configured to send RLC entity configuration information of the target RB in each target cell group to a terminal before sending first media access control, MAC, control element information to the terminal;

The base station of the embodiment of the invention further comprises:

and a second transmission module, configured to send the first medium access control MAC control element information to the terminal, and then perform DC duplicate transmission through a default RLC entity of each target cell group, when the first MAC control element information is used to indicate that the target RB is activated for DC duplicate transmission.

In the base station of the embodiment of the invention, the first MAC control unit information is used for indicating that the target RB is activated by CA repeated transmission, a first target cell group in a plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

further comprising: a third transmission module, configured to perform CA repeat transmission through two RLC entities configured in the first target cell group and CCs corresponding to the two RLC entities, after sending the first MAC control element information to the terminal;

In the base station of the embodiment of the invention, the first MAC control unit information is used for indicating that the target RB is activated by CA repeated transmission, and a plurality of target cell groups are respectively configured with two RLC entities;

further comprising: and the fourth transmission module is used for performing CA repeated transmission through two RLC entities corresponding to the target cell group for sending the first MAC control unit information and CCs corresponding to the two RLC entities respectively.

The base station of the embodiment of the invention further comprises:

a second sending module, configured to send second MAC control element information to the terminal after the generating module generates the first MAC control element information, where the second MAC control element information is used to indicate to deactivate repeated transmission of the target RB;

The base station of the embodiment of the invention further comprises:

the control module is used for controlling a first base station corresponding to the main cell group to inform a second base station corresponding to the auxiliary cell group of the transmission mode of the target RB;

or, the second base station is used for controlling the second base station corresponding to the auxiliary cell group to send the repeated transmission attribute information to the first base station corresponding to the main cell group, wherein the repeated transmission attribute information includes whether the CA repeated transmission is supported and/or whether the DC repeated transmission is supported; so that the first base station determines the transmission mode of a target RB according to the repeated transmission attribute information and informs the second base station;

or, the second base station is used for controlling the second base station corresponding to the secondary cell group to determine the transmission mode of the target radio bearer RB and inform the first base station corresponding to the main cell group;

As shown in fig. 17, an embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

In fig. 17, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1700 and various circuits of memory represented by memory 1720 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1710 may be a plurality of elements including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 1730 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1700 is responsible for managing the bus architecture and general processing, and the memory 1720 may store data used by the processor 1700 in performing operations.

Optionally, the processor 1700 is further configured to read the program in the memory 1720, and execute the following steps:

Optionally, a first target cell group in the multiple target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the multiple target cell groups corresponding to the terminal is configured with one RLC entity;

the processor 1700 is further configured to read the program in the memory 1720 and execute the following steps:

Optionally, two RLC entities are configured in each of the plurality of target cell groups;

The terminal of the embodiment of the invention receives first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeated transmission or Carrier Aggregation (CA) repeated transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group which is a cell group corresponding to the terminal; and transmitting the target RB according to the first MAC control unit information. The embodiment of the invention can effectively activate the repeated transmission through a smaller signaling overhead, namely the 1-byte first MAC control unit, can effectively save the signaling resource activation and the repeated transmission air interface resource, and can ensure the continuity and compatibility of the protocol design.

When executed by the processor, the program can implement all the implementation manners in the above method embodiment applied to the terminal side, and is not described herein again to avoid repetition.

As shown in fig. 18, an embodiment of the present invention further provides a terminal, including:

a first receiving module 1801, configured to receive first medium access control, MAC, control element information, where the first MAC control element information is used to indicate whether a target radio bearer RB is activated for dual connectivity DC repeat transmission or carrier aggregation CA repeat transmission, and the target RB corresponds to one or two RLC entities in each target cell group, where the target cell group is a cell group corresponding to the terminal;

a first transmission module 1802, configured to transmit the target RB according to the first MAC control element information.

The terminal of the embodiment of the invention further comprises:

an obtaining module, configured to obtain RLC entity configuration information of the target RB in each target cell group before receiving first media access control MAC control element information;

In the terminal of the embodiment of the present invention, the first transmission module is configured to perform DC duplicate transmission by using a default RLC entity of each target cell group when the first MAC control element information is used to indicate that the target RB is activated as DC duplicate transmission.

In the terminal of the embodiment of the invention, a first target cell group in a plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

the first transmission module is configured to perform CA repeat transmission through two RLC entities configured in the first target cell group and CCs corresponding to the two RLC entities, respectively, if the first MAC control element information indicates that the target RB is activated as CA repeat transmission,

or, the apparatus is configured to, when the first MAC control element information is used to indicate that the target RB is activated and CA repeat transmission is performed, perform CA repeat transmission through two RLC entities configured in the first target cell group and CCs corresponding to the two RLC entities when the first MAC control element information is sent through the first target cell group; and when the first MAC control unit information is sent by the second target cell group, the repeated transmission of the target RB is deactivated, and the transmission is only carried out on one RLC entity configured in the second target cell group.

In the terminal of the embodiment of the invention, a plurality of target cell groups are respectively configured with two RLC entities;

the first transmission module is configured to perform CA repeat transmission through two RLC entities corresponding to a target cell group that sends the first MAC control element information and CCs corresponding to the two RLC entities, respectively, when the first MAC control element information is used to indicate that a target RB is activated for CA repeat transmission.

The terminal of the embodiment of the invention further comprises:

a second receiving module, configured to receive second MAC control element information, where the second MAC control element information is used to instruct to deactivate repeated transmission of a target RB;

and the processing module is used for deactivating the repeated transmission of the target RB according to the second MAC control unit information and sending the uplink data of the target RB on a default RLC entity corresponding to the target RB.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for indicating repeated transmission is applied to a base station, and is characterized by comprising the following steps:

when a terminal is configured with dual-connection DC repeat transmission and carrier aggregation CA repeat transmission at the same time, and one radio bearer is configured with more than two radio link layer control protocol RLC entities, generating first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether the target Radio Bearer (RB) is activated by the dual-connection DC repeat transmission or the carrier aggregation CA repeat transmission, the target RB corresponds to one or two radio link layer control protocol RLC entities in each target cell group, and the target cell group is the cell group corresponding to the terminal;

and sending the first MAC control unit information to a terminal.

2. The duplicate transmission indication method according to claim 1, wherein the first MAC control element information is indicated by a predetermined logical channel identification LCID in a MAC subheader, the length of the first MAC control element information is a preset fixed byte, and each bit in the first MAC control element information is used to indicate whether a target RB corresponding to the bit is activated for DC duplicate transmission or CA duplicate transmission.

3. The duplicate transmission indication method of claim 1, wherein before sending the first MAC control element information to the terminal, further comprising:

4. The duplicate transmission indication method of claim 3 wherein when the first MAC control element information indicates that the target RB is active is DC duplicate transmission;

5. The duplicate transmission indication method of claim 3, wherein when the first MAC control element information indicates that the target RB is activated is CA duplicate transmission, and a first target cell group in the plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group in the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

6. The duplicate transmission indication method of claim 3 wherein when the first MAC control element information indicates that the target RB is activated is CA duplicate transmission and a plurality of the target cell groups are configured with two RLC entities respectively;

7. The method of claim 1, wherein after generating the first MAC control element information, the method further comprises:

8. The duplicate transmission indication method of claim 1, wherein before sending the first MAC control element information to the terminal, further comprising:

9. A repeated transmission indication method is applied to a terminal, and is characterized by comprising the following steps:

receiving first Media Access Control (MAC) control unit information, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeat transmission or Carrier Aggregation (CA) repeat transmission, the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, the target cell group is a cell group corresponding to the terminal, the terminal is simultaneously configured with the DC repeat transmission and the CA repeat transmission, and more than two radio link layer control protocol (RLC) entities are configured for one radio bearer;

10. The method of claim 9, wherein before receiving the first MAC control element information, the method further comprises:

11. The method of claim 10, wherein the transmitting the target RB according to the first MAC control element information comprises:

12. The repeated transmission indicating method of claim 10, wherein a first target cell group of the plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group of the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

13. The duplicate transmission indication method of claim 10 wherein a plurality of the target cell groups are respectively configured with two RLC entities;

14. The duplicate transmission indication method according to claim 9, further comprising:

15. A base station, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

16. The base station of claim 15, wherein the first MAC control element information is indicated by a predetermined logical channel identification LCID in a MAC subheader, wherein the length of the first MAC control element information is a preset fixed byte, and wherein each bit in the first MAC control element information is used for indicating whether a target RB corresponding to the bit is activated for DC repeat transmission or CA repeat transmission.

17. The base station of claim 15, wherein the processor when executing the program further performs the steps of:

18. The base station of claim 17, wherein when the first MAC control element information indicates that the target RB is activated is DC repeated transmission;

the processor, when executing the program, further implements the steps of:

19. The base station of claim 17, wherein when the first MAC control element information indicates that the target RB is activated is CA repeat transmission, and a first target cell group of the plurality of target cell groups corresponding to the terminal is configured with two RLC entities, and a second target cell group of the plurality of target cell groups corresponding to the terminal is configured with one RLC entity;

the processor, when executing the program, further implements the steps of:

20. The base station of claim 17, wherein when the first MAC control element information indicates that the target RB is activated is CA repeat transmission and a plurality of the target cell groups are respectively configured with two RLC entities;

the processor, when executing the program, further implements the steps of:

21. The base station of claim 15, wherein the processor when executing the program further performs the steps of:

22. The base station of claim 15, wherein the processor when executing the program further performs the steps of:

23. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the repeat transmission indication method of any one of claims 1 to 8.

24. A terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

receiving first Media Access Control (MAC) control unit information through a transceiver, wherein the first MAC control unit information is used for indicating whether a target Radio Bearer (RB) is activated by dual-connection Direct Current (DC) repeat transmission or Carrier Aggregation (CA) repeat transmission, the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, the target cell group is a cell group corresponding to the terminal, the terminal is configured with the DC repeat transmission and the CA repeat transmission at the same time, and more than two radio link layer control protocol (RLC entities) are configured for one radio bearer;

25. The terminal of claim 24, wherein the processor, when executing the program, further performs the steps of:

26. The terminal of claim 25, wherein the processor, when executing the program, further performs the steps of:

27. The terminal of claim 25, wherein a first target cell group of the plurality of target cell groups to which the terminal corresponds is configured with two RLC entities, and wherein a second target cell group of the plurality of target cell groups to which the terminal corresponds is configured with one RLC entity;

the processor, when executing the program, further implements the steps of:

28. The terminal of claim 25, wherein a plurality of the target cell groups are respectively configured with two RLC entities;

the processor, when executing the program, further implements the steps of:

29. The terminal of claim 24, wherein the processor, when executing the program, further performs the steps of:

30. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the repeat transmission indication method of any one of claims 9 to 14.

31. A base station, comprising:

a generating module, configured to generate first MAC control element information when a terminal configures dual-connectivity DC duplicate transmission and carrier aggregation CA duplicate transmission at the same time, and when one radio bearer configuration is greater than two RLC entities, the first MAC control element information is used to indicate whether a target RB is activated for dual-connectivity DC duplicate transmission or carrier aggregation CA duplicate transmission, and the target RB corresponds to one or two RLC entities in each target cell group, which is a cell group corresponding to the terminal;

32. A terminal, comprising:

a first receiving module, configured to receive first Medium Access Control (MAC) control unit information, where the first MAC control unit information is used to indicate whether a target Radio Bearer (RB) is activated by dual-connectivity (DC) repeat transmission or Carrier Aggregation (CA) repeat transmission, and the target RB corresponds to one or two radio link layer control protocol (RLC) entities in each target cell group, where the target cell group is a cell group corresponding to the terminal, the terminal configures both DC repeat transmission and CA repeat transmission, and configures more than two RLC entities for one radio bearer;