WO2019178844A1 - Data transmission method and device - Google Patents

Abstract

The present invention provides a data transmission method and device. In embodiments of the present invention, when a terminal detects that a beam failure has occurred in a secondary cell, and has caused the secondary cell not to have a proprietary PRACH resource, the terminal performs a random access process of a primary cell by using a proprietary PRACH resource of the primary cell, so as to update a serving beam of the secondary cell, such that reliable data transmission is realized when a beam failure has occurred in a serving cell of a terminal in a CA scenario, thereby ensuring the reliability of data transmission.

Description

Data transmission method and device Technical field

The present invention relates to data transmission technologies, and in particular, to a data transmission method and apparatus.

Background technique

In a wireless communication system having Carrier Aggregation (CA) characteristics, a terminal can communicate with a network device through a plurality of serving cells. The one of the plurality of serving cells is a primary cell (Primary Cell, PCell), and the other serving cell is a secondary cell (SCell), and the terminal can send an uplink signal to the network device through different serving cells.

In the actual application process, the terminal may have a beam failure of the serving cell, that is, the primary cell or the secondary cell. Therefore, it is not necessary to provide a data transmission method, which is used to implement a beam failure of the serving cell in the terminal in the CA scenario. Reliable data transfer.

Summary of the invention

Aspects of the present invention provide a data transmission method and apparatus for implementing reliable data transmission when a terminal fails to generate a beam of a serving cell in a CA scenario.

An aspect of the present invention provides a data transmission method, including:

The terminal detects that the secondary cell has failed to generate a beam;

If the secondary cell does not have a dedicated PRACH resource, the terminal performs a random access procedure of the primary cell to update the service beam of the secondary cell by using the dedicated PRACH resource configured by the primary cell.

In another aspect of the invention, a data transmission apparatus is provided, comprising:

a beam detecting unit, configured to detect that a secondary cell has a beam failure;

And a random access unit, configured to perform a random access procedure of the primary cell to update a service beam of the secondary cell, if the secondary cell is not configured with a dedicated PRACH resource, and the dedicated PRACH resource configured by the primary cell is used.

According to the foregoing technical solution, in the embodiment of the present invention, the terminal detects that the secondary cell has a beam failure, so that if the secondary cell does not have a dedicated PRACH resource, the terminal can use the dedicated PRACH resource configured by the primary cell to perform the primary cell. The random access process is used to update the service beam of the secondary cell, so that when the terminal fails to generate a beam of the serving cell in the CA scenario, reliable data transmission is realized, and the reliability of data transmission can be effectively ensured.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive workability.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a data transmission apparatus according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

In the present invention, the terminal may separately configure and maintain a timer and a counter for each of the multiple serving cells, wherein the primary cell and the at least one secondary cell are included in each serving cell. The data transmission status of each serving cell is detected within the running time of the configured timer. For the division of the primary cell and the secondary cell, the related technologies in the prior art may be specifically used, and details are not described herein again.

If a serving cell has a beam failure and the serving cell is configured with a dedicated PRACH resource, the terminal may perform a random access procedure on the serving cell by using the dedicated PRACH resource configured by the serving cell to update the The service beam of the serving cell is used to ensure the data transmission quality of the serving cell.

The dedicated physical random access channel (PRACH) resource configured by the serving cell is a non-contention based random access (Beion Failure Recovery (BFR)). , CFRA), the exclusive PRACH may include, but is not limited to, at least one of the following resources:

Time domain resource

Frequency domain resources;

The code domain resource is the preamble sequence.

The terminal may specifically adopt a Media Access Control (MAC) layer of the terminal, and separately maintain a timer and a counter configured by each serving cell. In a specific implementation, the MAC layer of the terminal may specifically maintain a timer and a counter configured by each serving cell. If the MAC layer of the terminal receives the first beam failure event of a serving cell reported by the physical layer of the terminal, the MAC layer of the terminal may start a timer configured by the serving cell, and The count value of the counter configured by the serving cell is incremented by one increment by one unit, and counting starts. For example, the count value is incremented by 1, and becomes 1. Within the running time of the timer configured by the serving cell, the MAC layer of the terminal fails to receive a beam of the serving cell reported by the physical layer of the terminal every time the beam fails. The event, the MAC layer of the terminal may increase the counter value of the counter by one count unit, for example, the count value is increased by one. The beam failure event is reported by the physical layer of the terminal that the serving cell fails to report a beam failure.

If the timer configured by the serving cell expires, the MAC layer of the terminal may reset the counter configured by the serving cell to zero, so that the MAC layer of the terminal continues to count the number of times the serving cell fails to generate a beam. When the next new beam failure occurs in the serving cell, the MAC layer of the terminal re-opens the timer configured by the serving cell, and increases the counter value of the counter configured by the serving cell from 0 to 1 count unit. Start counting, for example, the count value increases by 1, becoming 1.

If the count value of the counter configured by the serving cell reaches the pre-configured threshold of the trigger beam recovery within the running time of the timer configured in the serving cell, it is confirmed that the serving cell has a beam failure and triggers the beam recovery process. . If the serving cell is configured with a dedicated PRACH resource, the MAC layer of the terminal may trigger the terminal to perform a random access procedure on the serving cell to update the serving beam of the serving cell.

In this way, the terminal can perform a random access procedure of the corresponding serving cell when the beam failure occurs in the serving cell, that is, the primary cell and the at least one secondary cell, to update the serving beam of the serving cell, thereby implementing reliable data transmission.

FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention, as shown in FIG. 1 .

101. The terminal detects that the secondary cell has failed to generate a beam.

102. If the secondary cell does not have a dedicated PRACH resource, the terminal uses the dedicated PRACH resource configured by the primary cell to perform a random access procedure of the primary cell to update the service beam of the secondary cell.

Optionally, in a possible implementation manner of the embodiment, the determining whether the secondary cell is configured with the dedicated PRACH resource may be specifically determined.

In a specific implementation process, if the secondary cell does not have a dedicated PRACH resource, the terminal may perform a random access process of the primary cell by using the dedicated PRACH resource configured by the primary cell on the primary cell. Updating the service beam of the secondary cell.

Specifically, the terminal may specifically obtain the random access configuration information of the primary cell, so that the terminal may select the dedicated PRACH resource configured by the primary cell according to the available beams of the secondary cell; The random access configuration information of the primary cell includes at least one of the following information:

Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the primary cell.

In the implementation process, the service beam of the primary cell can work normally. Therefore, if the terminal can keep the service beam of the primary cell unchanged, the dedicated PRACH configured according to the available beam of the secondary cell and the primary cell. Corresponding relationship of resources, selecting a dedicated PRACH resource configured by the primary cell corresponding to the available beam of the secondary cell, and performing a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update The serving beam of the secondary cell.

In another specific implementation process, if the secondary cell is configured with a dedicated PRACH resource, the terminal may adopt an existing technical solution, and perform the exclusive PRACH resource configured by the secondary cell on the secondary cell. A random access procedure of the secondary cell to update the service beam of the secondary cell.

Specifically, the terminal may specifically obtain the random access configuration information of the secondary cell, so that the terminal may select, according to the available beam of the secondary cell, the random access configuration information of the secondary cell. The dedicated PRACH resource configured by the secondary cell, where the random access configuration information of the secondary cell may include, but is not limited to, at least one of the following information:

Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the secondary cell.

In the implementation process, the terminal selects the secondary cell according to the corresponding relationship between the available beam of the secondary cell and the dedicated PRACH resource configured by the secondary cell, because the terminal detects that the secondary cell has failed the beam, that is, the service beam of the terminal is faulty. The dedicated PRACH resource configured by the secondary cell corresponding to the available beam, and the dedicated PRACH resource configured by the secondary cell is used to perform a random access procedure of the secondary cell to update the service beam of the secondary cell.

It should be noted that, in this implementation manner, the available beam of the serving cell, that is, the available beam of the primary cell or the available beam of the secondary cell, refers to a beam whose reference signal strength is greater than or equal to a pre-configured signal threshold, for example, includes synchronization. The signal strength of the combined signal block of the signal and the Physical Broadcast Channel (PBCH) or the signal strength of the Channel Status Information-Reference Signal (CSI-RS).

Optionally, in a possible implementation manner of the embodiment, if the secondary cell is configured with a dedicated PRACH resource, the terminal may adopt an existing technical solution, and use the secondary cell on the secondary cell. The dedicated PRACH resource is configured to perform a random access procedure of the secondary cell to update the service beam of the secondary cell.

Specifically, the terminal may obtain the random access configuration information of the secondary cell, and the terminal may select the dedicated PRACH resource configured by the secondary cell according to the available beam of the secondary cell; The random access configuration information of the secondary cell includes at least one of the following information:

Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the secondary cell.

In the implementation process, the terminal selects the secondary cell according to the corresponding relationship between the available beam of the secondary cell and the dedicated PRACH resource configured by the secondary cell, because the terminal detects that the secondary cell has failed the beam, that is, the service beam of the terminal is faulty. The dedicated PRACH resource configured by the secondary cell corresponding to the available beam, and the dedicated PRACH resource configured by the secondary cell is used to perform a random access procedure of the secondary cell to update the service beam of the secondary cell.

It can be understood that, when the terminal successfully updates the service beam of the secondary cell, a complete random access procedure of the secondary cell needs to be performed, that is, the terminal sends a Msg1 message to the network device, for example, a 5 g base station (gNB), and initiates a randomization of the secondary cell. The access process starts, and the terminal receives the random access response (RAR) sent by the network device, that is, the Msg2 message ends.

After the terminal performs the random access procedure of the secondary cell, that is, the terminal uses the dedicated PRACH resource configured by the secondary cell to initiate a random access procedure of the secondary cell, if the terminal detects that the primary cell has failed to generate a beam, the terminal The terminal may adopt different technical solutions to successfully update the serving beam of the secondary cell and the service beam of the primary cell.

In a specific implementation process, the terminal preferentially utilizes the dedicated PRACH resource configured by the primary cell to perform a random access procedure of the primary cell to update the service beam of the primary cell.

For example, the terminal may specifically perform a random access procedure of the secondary cell, and then the terminal may perform a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the primary The serving beam of the cell and the serving beam of the secondary cell.

Specifically, the terminal may obtain the random access configuration information of the primary cell, so that the terminal may select the primary cell according to an available beam of the primary cell and an available beam of the secondary cell. The configured dedicated PRACH resource; wherein the random access configuration information of the primary cell includes at least one of the following information:

The corresponding relationship between the available beam of the primary cell, the available beam of the secondary cell, and the dedicated PRACH resource configured by the primary cell.

In the implementation process, the service beam of the primary cell also fails. Therefore, the terminal needs to perform the random access procedure of the primary cell in the process of performing the random access of the secondary cell. At this time, the terminal may terminate the random access process of the secondary cell, that is, the terminal is on the secondary cell, and no longer listens to the random access response (RAR) message of the secondary cell, and further, according to the available beam of the primary cell. Corresponding relationship between the available beam of the secondary cell and the dedicated PRACH resource configured by the primary cell, and selecting the dedicated PRACH resource configured by the primary cell corresponding to the available beam of the primary cell and the available beam of the secondary cell, and The random access procedure of the primary cell is performed by using the dedicated PRACH resource configured by the primary cell to simultaneously update the service beam of the primary cell and the service beam of the secondary cell.

Or, for example, the terminal stops performing random access of the secondary cell; the terminal performs a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell, to update the service beam of the primary cell. And after the terminal updates the service beam of the primary cell, the random access procedure of the secondary cell is re-executed by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell.

Specifically, the terminal may specifically obtain the random access configuration information of the primary cell, so that the terminal may select the dedicated PRACH resource configured by the primary cell according to the available beams of the primary cell; The random access configuration information of the primary cell includes at least one of the following information:

Correspondence between the available beams of the primary cell and the dedicated PRACH resources configured by the primary cell.

In the implementation process, the service beam of the primary cell also fails. Therefore, the terminal needs to perform the random access procedure of the primary cell in the process of performing the random access of the secondary cell. At this time, the terminal may temporarily stop performing the random access procedure of the secondary cell, and then select an available beam with the primary cell according to the corresponding relationship between the available beam of the primary cell and the dedicated PRACH resource configured by the primary cell. Corresponding to the dedicated PRACH resource configured by the primary cell, and using the dedicated PRACH resource configured by the primary cell, performing a random access procedure of the primary cell to update the service beam of the primary cell.

After the terminal successfully updates the service beam of the primary cell, the terminal may resume the random access procedure that was previously stopped, according to the correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the secondary cell. Selecting a dedicated PRACH resource configured by the secondary cell corresponding to the available beam of the secondary cell, and performing a random access procedure of the secondary cell by using the dedicated PRACH resource configured by the secondary cell to update the secondary cell Service beam.

In another specific implementation process, the terminal continues to perform random access of the secondary cell; and the terminal performs a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the The service beam of the primary cell.

In the implementation process, the service beam of the primary cell also fails. Therefore, the terminal needs to perform the random access procedure of the primary cell in the process of performing the random access of the secondary cell. At this time, the terminal can continue to perform the random access of the secondary cell, that is, the RAR message of the secondary cell in the random access response (RAR) window of the secondary cell, and can start performing the random access process of the primary cell, that is, the primary The RAR window of the cell listens to the RAR message of the primary cell. Then, in the overlapping area between the RAR window of the secondary cell and the RAR window of the primary cell, the terminal can both listen to the RAR message of the secondary cell and listen to the RAR message of the primary cell.

In the present invention, the random access configuration information of the serving cell, that is, the random access configuration information of the primary cell or the random access configuration information of the secondary cell, may be configured by the network device.

Specifically, the terminal may specifically receive random access configuration information of the serving cell that is sent by the network device by using Downlink Control Information (DCI), high layer signaling, or system broadcast message.

For example, the high-level signaling may be a radio resource control (RRC) message, and the random access configuration information of the serving cell may be carried by an information element (IE) in an RRC message. The RRC message may be an RRC message in the prior art, for example, an RRC CONNECTION RECONFIGURATION message, etc., which is not limited in this embodiment, and the IE of the existing RRC message is extended to carry the service. The random access configuration information of the cell, or the RRC message may also be an RRC message different from that existing in the prior art.

Or, for example, the high-level signaling may be a Media Access Control (MAC) control element (Control Element, CE) message, and may further carry a random connection of the serving cell by adding a new MAC CE message. Enter configuration information.

Alternatively, for example, the existing primary information block (MIB) or the (System Information Block (SIB) in the system broadcast message may be used to carry the random access configuration information of the serving cell, or may also be Adding a new SIB carries random access configuration information of the serving cell.

It can be understood that the random access configuration information of the serving cell can also be agreed by a protocol.

In this embodiment, the terminal detects that the secondary cell has failed to generate a beam, so that if the secondary cell does not have a dedicated PRACH resource, the terminal can perform the random access process of the primary cell by using the dedicated PRACH resource configured by the primary cell. The service beam of the secondary cell is updated, so that when the terminal fails to generate a beam of the serving cell in the CA scenario, reliable data transmission is realized, and the reliability of data transmission can be effectively ensured.

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

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

FIG. 2 is a schematic structural diagram of a data transmission apparatus according to another embodiment of the present invention, as shown in FIG. 2 . The data transmission device of this embodiment may include a beam detecting unit 21 and a random access unit 22. The beam detecting unit 21 is configured to detect that the secondary cell has a beam failure, and the random access unit 22 is configured to perform the primary cell by using the dedicated PRACH resource configured by the primary cell if the secondary cell is not configured with the dedicated PRACH resource. A random access procedure to update a serving beam of the secondary cell.

It should be noted that the data transmission device provided in this embodiment may be a terminal.

Optionally, in a possible implementation manner of the embodiment, the serving beam of the primary cell does not change.

Optionally, in a possible implementation manner of the embodiment, the random access unit 22 may be further configured to: if the secondary cell is configured with a dedicated PRACH resource, use the exclusive PRACH configured by the secondary cell. The resource performs a random access procedure of the secondary cell to update the service beam of the secondary cell.

In a specific implementation process, the random access unit 22 may be configured to use a dedicated PRACH resource configured by the secondary cell to initiate a random access procedure of the secondary cell to update the service beam of the secondary cell. If the beam detecting unit 21 detects that the primary cell has failed to generate a beam, the dedicated PRACH resource configured by the primary cell is preferentially used to perform a random access procedure of the primary cell to update the serving beam of the primary cell.

For example, the random access unit 22 may be specifically configured to terminate performing random access of the secondary cell; and perform a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the primary The serving beam of the cell and the serving beam of the secondary cell.

Or, for example, the random access unit 22 may be specifically configured to stop performing random access of the secondary cell, and perform a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the After the service beam of the primary cell is successfully updated, and after the service beam of the primary cell is successfully updated, the random access procedure of the secondary cell is re-executed by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell. .

In another specific implementation process, the random access unit 22 may be specifically configured to continue to perform random access of the secondary cell; and the terminal performs the primary cell by using the dedicated PRACH resource configured by the primary cell. A random access procedure to update the service beam of the primary cell.

It should be noted that the physical random access channel (PRACH) resource configured by the serving cell (ie, the primary cell or the secondary cell) in the present invention is used for beam failure recovery (Beam Failure). Recovery, BFR) based on Contention Free Random Access (CFRA), which may include, but is not limited to, at least one of the following resources:

Time domain resource

Frequency domain resources;

The code domain resource is the preamble sequence.

Optionally, in a possible implementation manner of the embodiment, the random access unit 22 may be further configured to acquire random access configuration information of the primary cell, for being available according to the primary cell. Selecting a dedicated PRACH resource configured by the primary cell by using a beam or an available beam of the primary cell and an available beam of the secondary cell, where the random access configuration information of the primary cell includes at least one of the following information: :

Corresponding relationship between the available beams of the primary cell, the available beams of the secondary cell, and the dedicated PRACH resources configured by the primary cell;

Correspondence between the available beams of the primary cell and the dedicated PRACH resources configured by the primary cell;

Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the primary cell.

It should be noted that the method performed by the terminal in the embodiment corresponding to FIG. 1 can be implemented by the data transmission apparatus provided in this embodiment. For details, refer to related content in the embodiment corresponding to FIG. 1, and details are not described herein again.

In this embodiment, the beam detecting unit detects that the secondary cell generates a beam failure, so that if the secondary cell does not have a dedicated PRACH resource, the random access unit can perform the random connection of the primary cell by using the dedicated PRACH resource configured by the primary cell. The process is performed to update the service beam of the secondary cell, so that when the terminal fails to generate a beam of the serving cell in the CA scenario, reliable data transmission is realized, and the reliability of data transmission can be effectively ensured.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (14)

A data transmission method, comprising: The terminal detects that the secondary cell has failed to generate a beam; If the secondary cell does not have a dedicated PRACH resource, the terminal performs a random access procedure of the primary cell to update the service beam of the secondary cell by using the dedicated PRACH resource configured by the primary cell. The method of claim 1 wherein the serving beam of the primary cell is unchanged. The method of claim 1 further comprising: If the secondary cell is configured with a dedicated PRACH resource, the terminal performs a random access procedure of the secondary cell by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell. The method according to claim 3, wherein if the secondary cell is configured with a dedicated PRACH resource, the terminal performs a random access procedure of the secondary cell by using the dedicated PRACH resource configured by the secondary cell, To update the service beam of the secondary cell, including: The terminal uses a dedicated PRACH resource configured by the secondary cell to initiate a random access procedure of the secondary cell to update the service beam of the secondary cell; If the terminal detects a beam failure in the primary cell, The terminal preferentially utilizes the dedicated PRACH resource configured by the primary cell to perform a random access procedure of the primary cell to update the service beam of the primary cell; or The terminal continues to perform random access of the secondary cell; and the terminal performs a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the service beam of the primary cell. The method according to claim 4, wherein the terminal preferentially uses the dedicated PRACH resource configured by the primary cell to perform a random access procedure of the primary cell to update the service beam of the primary cell, including: The terminal terminates performing random access of the secondary cell; and the terminal performs a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the service beam of the primary cell and the secondary Service beam of the cell; or The terminal stops performing random access of the secondary cell; the terminal performs a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the service beam of the primary cell; and the terminal After the service beam of the primary cell is successfully updated, the random access procedure of the secondary cell is re-executed by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell. The method according to any one of claims 1 to 5, wherein the dedicated PRACH resource comprises at least one of the following resources: Time domain resource Frequency domain resources; Code domain resources. The method according to any one of claims 1 to 5, wherein if the secondary cell does not have a dedicated PRACH resource, the terminal performs a random operation of the primary cell by using the dedicated PRACH resource configured by the primary cell. Before the access process is updated to update the service beam of the secondary cell, the method further includes: The terminal acquires random access configuration information of the primary cell, where the terminal selects the primary cell according to an available beam of the primary cell, an available beam of the primary cell, and an available beam of the secondary cell. The configured dedicated PRACH resource; wherein the random access configuration information of the primary cell includes at least one of the following information: Corresponding relationship between the available beams of the primary cell, the available beams of the secondary cell, and the dedicated PRACH resources configured by the primary cell; Correspondence between the available beams of the primary cell and the dedicated PRACH resources configured by the primary cell; Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the primary cell. A data transmission device, comprising: a beam detecting unit, configured to detect that a secondary cell has a beam failure; And a random access unit, configured to perform a random access procedure of the primary cell to update a service beam of the secondary cell, if the secondary cell is not configured with a dedicated PRACH resource, and the dedicated PRACH resource configured by the primary cell is used. The apparatus according to claim 8, wherein the service beam of the primary cell is unchanged. The apparatus according to claim 8, wherein said random access unit is further used for If the secondary cell is configured with a dedicated PRACH resource, the random access procedure of the secondary cell is performed by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell. The device according to claim 10, wherein the random access unit is specifically configured to And using a dedicated PRACH resource configured by the secondary cell to initiate a random access procedure of the secondary cell to update a service beam of the secondary cell; If the beam detecting unit detects that the primary cell has failed to generate a beam, Dedicating the dedicated PRACH resource configured by the primary cell to perform a random access procedure of the primary cell to update the service beam of the primary cell; or And performing, by using the dedicated PRACH resource configured by the primary cell, the random access procedure of the primary cell to update the service beam of the primary cell. The device according to claim 11, wherein the random access unit is specifically configured to Terminating the random access of the secondary cell; and performing a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the service beam of the primary cell and the service beam of the secondary cell; or Stop performing random access of the secondary cell; performing a random access procedure of the primary cell by using the dedicated PRACH resource configured by the primary cell to update the service beam of the primary cell; and updating the service beam of the primary cell successfully Then, the random access procedure of the secondary cell is re-executed by using the dedicated PRACH resource configured by the secondary cell to update the service beam of the secondary cell. The apparatus according to any one of claims 8 to 12, wherein the dedicated PRACH resource comprises at least one of the following resources: Time domain resource Frequency domain resources; Code domain resources. The device according to any one of claims 8 to 12, wherein the random access unit is further used for Obtaining random access configuration information of the primary cell, for selecting an exclusive PRACH resource configured by the primary cell according to an available beam of the primary cell or an available beam of the primary cell and an available beam of the secondary cell The random access configuration information of the primary cell includes at least one of the following information: Corresponding relationship between the available beams of the primary cell, the available beams of the secondary cell, and the dedicated PRACH resources configured by the primary cell; Correspondence between the available beams of the primary cell and the dedicated PRACH resources configured by the primary cell; Correspondence between the available beams of the secondary cell and the dedicated PRACH resources configured by the primary cell.

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