LTM configuration method and device, equipment and storage medium

Abstract

The invention relates to the technical field of communication, in particular to an LTM configuration method and device, equipment and a storage medium. First configuration information is sent to a CU, the first configuration information comprises cell identification information of all candidate cells under a candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information comprises LTM configuration information of the candidate cells; and receiving third configuration information from the CU, wherein the third configuration information comprises LTM configuration information of candidate cells under all candidate DUs associated with the CU. According to the method, the target cell or the target beam to be switched of the UE can be accurately determined, so that link success / beam success is ensured.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to an LTM configuration method, apparatus, device, and storage medium. Background Art

[0002] In the L1 / L2 Triggered Mobility (LTM for short, where L1 is layer 1 and L2 is layer 2) in R18, only L1 measurements and reports based on Synchronization Signal Blocks (SS Blocks, abbreviated as SSBs) are supported. The network side selects candidate cells and their candidate beams to be switched from the L1 measurement results reported by the User Equipment (UE), and enables the UE to complete the handover from the source cell to the candidate cell to be switched. When configuring the Transmission Configuration Indicator (TCI) of the beam, it is supported to configure the SSB of the candidate cell as the Reference Signal (RS), and it is also supported to configure the Tracking Reference Signal (TRS) of the candidate cell as the RS.

[0003] In the related art, if the TCI configured for the candidate cell uses the TRS as the RS supported by the beam, it may cause the handover to be postponed or the target cell or target beam of the handover to be inappropriate, thereby triggering link failure / beam failure and even reconstruction. Summary of the Invention

[0004] This application provides an LTM configuration method, apparatus, device, and storage medium to accurately determine the target cell or target beam to be switched by the UE, thereby ensuring link success / beam success.

[0005] In a first aspect, this application provides an LTM configuration method, which is applied to a candidate DU where a candidate cell is located. The LTM configuration method includes: sending first configuration information to a Central Unit (CU), where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; receiving third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0006] In some embodiments, the cell identification information includes at least one of the following: LTM candidate configuration identifier; frequency point information and / or Physical Cell Identifier (PCI); identifier information of the candidate DU.

[0007] In some embodiments, the LTM configuration information includes at least one of the following: TRS configuration information; the association relationship configuration information between the TRS and the SSB; power control configuration information; indication information for indicating whether multiple TAs are configured.

[0008] In some embodiments, the TRS configuration information includes at least one of the following: the resource set configuration information of the TRS; the resource configuration information of the TRS included in each resource set; the subcarrier spacing of the TRS; the reference frequency point of the TRS; the cyclic prefix length; the configuration attribute of the TRS; QCL indication information.

[0009] In some embodiments, the association relationship configuration information between the TRS and the SSB includes: the explicit configuration method of the association relationship between the TRS and the SSB; and / or, the implicit configuration method of the association relationship between the TRS and the SSB.

[0010] In some embodiments, the explicit configuration method includes: for the TRS in the TCI configuration where the TRS is configured as the QCL type D source reference signal, configuring the SSB identifier having a QCL type D association with the TRS; for the TRS in the TCI configuration where the TRS is configured as any QCL type, configuring the SSB identifier having the corresponding QCL association with the TRS, and the QCL type can be QCL type A / B / C / D.

[0011] In some embodiments, the implicit configuration method includes at least one of the following: in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

[0012] In some embodiments, the power control configuration information includes at least one of the following: path loss reference signal configuration information; power control parameter configuration information for the uplink signal or the uplink channel.

[0013] In some embodiments, the trigger condition for sending the first configuration information to the CU includes: obtaining an LTM configuration request.

[0014] In some embodiments, the LTM configuration request includes at least one of the following: the cell identification information of the candidate cell; the PCI information and frequency point information corresponding to the candidate cell; the CGI information of the candidate cell; the identification information for requesting the configuration of the LTM; reference configuration information.

[0015] Second aspect, the present application provides an LTM configuration method, which is applied to a CU. The LTM configuration method includes: receiving first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; determining third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; and sending the third configuration information to each candidate DU.

[0016] In some embodiments, determining the third configuration information includes: sending the first configuration information to a source DU where a source cell is located; receiving the third configuration information from the source DU; or generating the third configuration information based on the first configuration information.

[0017] In some embodiments, after generating the third configuration information based on the first configuration information, it further includes: sending the third configuration information to the source DU.

[0018] Third aspect, the present application provides an LTM configuration method, which is applied to a source DU where a source cell is located. The LTM configuration method includes: generating third configuration information based on first configuration information from a CU, where the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; or receiving third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0019] In some embodiments, before generating the third configuration information based on the first configuration information from the CU, it further includes: receiving the first configuration information from the CU.

[0020] In some embodiments, after generating the third configuration information, it further includes: sending the third configuration information to the CU.

[0021] In some embodiments, it further includes: sending a handover command carrying the association relationship between a TRS and an SSB to a UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

[0022] In some embodiments, the triggering condition for sending a handover command carrying the association relationship between a TRS and an SSB to a UE includes: determining according to the third configuration information that a target cell to be handed over is configured with 2TA.

[0023] In some embodiments, the handover command further includes at least one of the following: cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identification of the target cell.

[0024] In a fourth aspect, the present application further provides an LTM configuration device, which is applied to a candidate DU where a candidate cell is located. The LTM configuration device includes: a sending module, configured to send first configuration information to a CU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; a receiving module, configured to receive third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0025] In some embodiments, the cell identification information includes at least one of the following: LTM candidate configuration identification; frequency point information and / or PCI; identification information of the candidate DU.

[0026] In some embodiments, the LTM configuration information includes at least one of the following: TRS configuration information; association relationship configuration information between TRS and SSB; power control configuration information; indication information for indicating whether multiple TAs are configured.

[0027] In some embodiments, the TRS configuration information includes at least one of the following: resource set configuration information of the TRS; resource configuration information of the TRS included in each resource set; subcarrier spacing of the TRS; reference frequency point of the TRS; cyclic prefix length; configuration attribute of the TRS; QCL indication information.

[0028] In some embodiments, the association relationship configuration information between TRS and SSB includes: an explicit configuration method for the association relationship between TRS and SSB; and / or, an implicit configuration method for the association relationship between TRS and SSB.

[0029] In some embodiments, the explicit configuration method includes: for the TRS in the TCI configuration where the TRS is configured as the QCL type D source reference signal, configuring the SSB identification having a QCL type D association with the TRS; for the TRS in the TCI configuration where the TRS is configured as any QCL type, configuring the SSB identification having a corresponding QCL association with the TRS, and the QCL type may be QCL type A / B / C / D.

[0030] In some embodiments, the implicit configuration method includes at least one of the following: in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

[0031] In some embodiments, the power control configuration information includes at least one of the following: path loss reference signal configuration information; power control parameter configuration information for the uplink signal or uplink channel.

[0032] In some embodiments, the trigger condition for sending the first configuration information to the CU includes: obtaining an LTM configuration request.

[0033] In some embodiments, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting the configuration of LTM; reference configuration information.

[0034] In a fifth aspect, the present application further provides an LTM configuration device, which is applied to the CU. The LTM configuration device includes: a receiving module, configured to receive first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; a determining module, configured to determine third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; and a sending module, configured to send the third configuration information to each candidate DU.

[0035] In some embodiments, when determining the third configuration information, the determining module is specifically configured to: send the first configuration information to the source DU where the source cell is located; receive the third configuration information from the source DU; or, generate the third configuration information based on the first configuration information.

[0036] In some embodiments, the sending module is further configured to send the third configuration information to the source DU after generating the third configuration information based on the first configuration information.

[0037] Sixth aspect, the present application further provides an LTM configuration device, which is applied to the source DU where the source cell is located. The LTM configuration device includes: a processing module, configured to perform the following operations: generate third configuration information based on first configuration information from the CU, where the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; or, receive third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0038] In some embodiments, the LTM configuration device further includes: a receiving module, configured to receive the first configuration information from the CU before generating the third configuration information based on the first configuration information from the CU.

[0039] In some embodiments, the LTM configuration device further includes: a sending module, configured to send the third configuration information to the CU after generating the third configuration information.

[0040] In some embodiments, the sending module is further configured to send a handover command carrying the association relationship between the TRS and the SSB to the UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

[0041] In some embodiments, the triggering condition for sending the handover command carrying the association relationship between the TRS and the SSB to the UE includes: determining that the target cell to be handed over is configured with 2TA according to the third configuration information.

[0042] In some embodiments, the handover command further includes at least one of the following: cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identification of the target cell.

[0043] Seventh aspect, the present application further provides an LTM configuration device, including: a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: send first configuration information to the CU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; receive third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0044] In some embodiments, the cell identification information includes at least one of the following: LTM candidate configuration identification; frequency point information and / or PCI; identification information of the candidate DU.

[0045] In some embodiments, the LTM configuration information includes at least one of the following: TRS configuration information; association relationship configuration information between the TRS and the SSB; power control configuration information; indication information for indicating whether multiple TAs are configured.

[0046] In some embodiments, the TRS configuration information includes at least one of the following: resource set configuration information of the TRS; resource configuration information of the TRS included in each resource set; subcarrier spacing of the TRS; reference frequency point of the TRS; cyclic prefix length; configuration attribute of the TRS; QCL indication information.

[0047] In some embodiments, the association relationship configuration information between the TRS and the SSB includes: explicit configuration mode of the association relationship between the TRS and the SSB; and / or, implicit configuration mode of the association relationship between the TRS and the SSB.

[0048] In some embodiments, the explicit configuration mode includes: for the TRS in the TCI configuration with the TRS configured as the QCL type D source reference signal, configuring the SSB identification associated with the TRS with QCL type D; for the TRS in the TCI configuration with the TRS configured as the TCI of any QCL type, configuring the SSB identification associated with the TRS with the corresponding QCL association, and the QCL type can be QCL type A / B / C / D.

[0049] In some embodiments, the implicit configuration mode includes at least one of the following: in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

[0050] In some embodiments, the power control configuration information includes at least one of the following: path loss reference signal configuration information; power control parameter configuration information for the uplink signal or uplink channel.

[0051] In some embodiments, the trigger condition for sending the first configuration information to the CU includes: obtaining an LTM configuration request.

[0052] In some embodiments, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting to configure the LTM; reference configuration information.

[0053] In an eighth aspect, the present application further provides an LTM configuration device, including: a memory, a transceiver, and a processor: the memory is used for storing computer programs; the transceiver is used for transmitting and receiving data under the control of the processor; the processor is used for reading the computer programs in the memory and performing the following operations: receiving first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; determining third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; and sending the third configuration information to each candidate DU.

[0054] In some embodiments, determining the third configuration information includes: sending the first configuration information to a source DU where the source cell is located; receiving the third configuration information from the source DU; or generating the third configuration information based on the first configuration information.

[0055] In some embodiments, after generating the third configuration information based on the first configuration information, it further includes: sending the third configuration information to the source DU.

[0056] In a ninth aspect, the present application further provides an LTM configuration device, including: a memory, a transceiver, and a processor: the memory is used for storing computer programs; the transceiver is used for transmitting and receiving data under the control of the processor; the processor is used for reading the computer programs in the memory and performing the following operations: generating third configuration information based on first configuration information from the CU, where the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; or receiving the third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0057] In some embodiments, before generating the third configuration information based on the first configuration information from the CU, it further includes: receiving the first configuration information from the CU.

[0058] In some embodiments, after generating the third configuration information, it further includes: sending the third configuration information to the CU.

[0059] In some embodiments, it further includes: sending a handover command carrying the association relationship between the TRS and the SSB to the UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

[0060] In some embodiments, the triggering condition for sending a handover command carrying the association relationship between the TRS and the SSB to the UE includes: determining, according to the third configuration information, that the target cell to be handed over is configured with 2TA.

[0061] In some embodiments, the handover command further includes at least one of the following: cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identifier of the target cell.

[0062] In a tenth aspect, the present application further provides a processor-readable storage medium storing a computer program for causing a processor to execute the above LTM configuration method.

[0063] The LTM configuration method, apparatus, device, and storage medium provided by the present application, the LTM configuration method includes: sending first configuration information to the CU, the first configuration information including cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, the second configuration information including LTM configuration information of the candidate cell; receiving third configuration information from the CU, the third configuration information including LTM configuration information of candidate cells under all candidate DUs associated with the CU. In the present application, each candidate DU sends cell identification information of all candidate cells under the candidate DU and LTM configuration information corresponding to each candidate cell to the CU, and the third configuration information includes LTM configuration information of candidate cells under all candidate DUs. Thus, when the source DU where the source cell is located obtains the third configuration information, it can send the LTM configuration information of candidate cells under all candidate DUs to the UE to accurately determine the target cell or target beam to be handed over by the UE, ensuring link success / beam success; all candidate DUs also obtain the third configuration information, thus ensuring that the UE can perform continuous handovers.

[0064] It should be understood that the content described in the above invention content part is not intended to limit the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] To more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0066] Figure 1 It is a schematic flowchart of an LTM configuration method provided by an embodiment of the present application;

[0067] Figure 2 A schematic diagram of the first configuration information of the candidate DU provided by the embodiment of the present application;

[0068] Figure 3 A schematic diagram of the method for configuring the association relationship between the TRS and the SSB in an explicit configuration manner provided by the embodiment of the present application;

[0069] Figure 4 A schematic diagram of the method for configuring the association relationship between the TRS and the SSB in an implicit configuration manner provided by the embodiment of the present application;

[0070] Figure 5 A schematic flowchart of another LTM configuration method provided by the embodiment of the present application;

[0071] Figure 6 A schematic flowchart of yet another LTM configuration method provided by the embodiment of the present application;

[0072] Figure 7 A schematic flowchart of still another LTM configuration method provided by the embodiment of the present application;

[0073] Figure 8 A schematic flowchart of still another LTM configuration method provided by the embodiment of the present application;

[0074] Figure 9 A schematic flowchart of still another LTM configuration method provided by the embodiment of the present application;

[0075] Figure 10 A schematic diagram of the structure of an LTM configuration device provided by the embodiment of the present application;

[0076] Figure 11 A schematic diagram of the structure of another LTM configuration device provided by the embodiment of the present application;

[0077] Figure 12 A schematic diagram of the structure of yet another LTM configuration device provided by the embodiment of the present application;

[0078] Figure 13 A schematic diagram of the structure of an LTM configuration device provided by the embodiment of the present application;

[0079] Figure 14 A schematic diagram of the structure of another LTM configuration device provided by the embodiment of the present application;

[0080] Figure 15 A schematic diagram of the structure of yet another LTM configuration device provided by the embodiment of the present application. Detailed implementation manners

[0081] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0082] In the embodiments of the present application, the term "plurality" refers to two or more, and other quantifiers are similar.

[0083] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0084] The inventor found in the research that R18 supports the cell change mechanism based on L1 / L2 commands. The cell change mechanism based on L1 / L2 commands aims to achieve a faster process than the cell change mechanism based on L3 commands. At the same time, the cell change mechanism based on L1 / L2 commands is not limited to handover and is also applicable to the change of the primary secondary cell (PSCell for short). To support the mobility based on L1 / L2 commands, the serving cell pre-configures the configuration information of the candidate cell to the UE in advance through the Radio Resource Control (RRC) message. The UE performs L1 measurements on the neighboring cells according to the received configuration and reports them to the serving cell. The serving cell makes a handover decision based on the measurement report. Before that, the serving cell can also trigger the UE to perform TA acquisition of the target cell, acquire the TA in advance, and carry the obtained valid TA value in the L1 / L2 cell change command to the UE to achieve the RACH-less cell change process and shorten the interruption delay.

[0085] In R18 LTM, only SSB-based L1 measurement and reporting are supported. That is, the network side selects candidate cells and their candidate beams for handover based on the L1 measurement results reported by the UE. However, currently when configuring TCI, that is, beam indication, both configuring SSB as the RS for candidate cells and configuring TRS as the RS for candidate cells are supported. When the candidate cell configures TRS as the RS supported by the beam, since the network side does not have any measurement result information based on TRS, the network side cannot determine the handover beam of the cell to be handed over, that is, cannot correctly select the access beam of the UE, and can only perform blind handover. Therefore, it may cause handover delay or the target cell or target beam of the handover to be very poor, resulting in link failure / beam failure, and even leading to reconstruction.

[0086] The embodiments of the present application provide an LTM configuration method, device, equipment, and storage medium. When each candidate DU provides the LTM configuration information of all candidate cells under the candidate DU, in addition to providing the TCI configuration, it is also necessary to correspondingly provide the association relationship between the TRS with TRS as the QCL source reference signal in the TCI configuration and its corresponding SSB. This association relationship can be provided and indicated separately by distinguishing different QCL types, or this association relationship is provided by explicitly configuring the QCL source reference signal of the TRS. After the source DU where the source cell is located obtains the LTM configuration information of the candidate cells under all candidate DUs, it is sent to the UE, so as to accurately determine the target cell or target beam to be handed over by the UE and ensure link success / beam success.

[0087] Among them, the method and the device are based on the same inventive concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repeated parts will not be described again.

[0088] The technical solutions provided by the embodiments of this application can be applied to various systems. For example, the applicable systems can be Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Long Term Evolution Advanced (LTE-A) systems, Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) systems, 5G New Radio (NR) systems, and their evolved communication systems, etc. These various systems can include terminal devices and network devices. The system can also include a core network part, such as an Evolved Packet System (EPS), 5G System (5GS), etc.

[0089] The terminal device involved in the embodiments of this application can be a device that provides voice and / or data connectivity to users, a handheld device with wireless connection capabilities, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device can be called a User Equipment (UE). The wireless terminal device can be a USB storage device, other personal computer memory devices, and dongles. It can also communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or a "cellular" phone) and a computer with a mobile terminal device.

[0090] For example, it can be a portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted mobile device that exchanges voice and / or data with a radio access network. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), personal computers, tablet computers, Machine-type Communication (MTC) terminal devices, and the like. The wireless terminal device can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, access point, remote terminal device, access terminal device, user terminal device, user agent, user device, and wireless access points and routers / modems that meet the limitations of this definition, which are not limited in the embodiments of this application.

[0091] The network device involved in the embodiments of the present application may be a base station, which may include multiple cells that provide services to terminals. Depending on the specific application scenarios, the base station may also be referred to as an access point, or may be a device in the access network that communicates with wireless terminal devices through one or more sectors over the air interface, or other names. The network device can be used to mutually replace the received air frames and Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an IP communication network. The network device can also coordinate the management of the attributes of the air interface. For example, the network device involved in the embodiments of the present application may be an evolved network device (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), etc., or may also be a Home evolved Node B (HeNB), a relay node, a femto, a pico, a network test device, etc. The embodiments of the present application do not limit this. In some network architectures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0092] The network device and the terminal device can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. The MIMO transmission can be single-user MIMO or multi-user MIMO. Depending on the form and number of the root antenna combinations, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or can also be diversity transmission, precoding transmission, beamforming transmission, etc.

[0093] In the embodiments of the present application, when the terminal device sends relevant information or similar descriptions to the network-side device, it only indicates that the relevant information is sent in the form of a wireless signal, and the intended recipient is the network device, and the network device can obtain the relevant information by receiving the wireless signal.

[0094] In some embodiments, an LTM configuration method is provided, which is applied to the candidate DU where the candidate cell is located. Figure 1 It is a schematic flowchart of an LTM configuration method provided by the embodiments of the present application, as Figure 1 shown, the method mainly includes the following steps:

[0095] S102: Send the first configuration information to the CU.

[0096] In this step, the first configuration information includes the cell identification information of all candidate cells under the candidate DU and the second configuration information corresponding to each candidate cell. The second configuration information includes the LTM configuration information corresponding to the candidate cell.

[0097] Specifically, the DU where the candidate cell is located is the candidate DU (C-DU). There is one or more candidate cells under each candidate DU, and each candidate DU sends the first configuration information to the CU. The candidate cell and the second configuration information are in one-to-one correspondence. As Figure 2 shown, under candidate DU #1, there are candidate cell #1 and candidate cell #2. The first configuration information of candidate DU #1 includes the cell identification information of candidate cell #1 and the second configuration information of candidate cell #1, and the cell identification information of candidate cell #2 and the second configuration information of candidate cell #2.

[0098] S104: Receive the third configuration information from the CU.

[0099] In this step, the third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs associated with the CU. That is, the third configuration information includes the complete LTM configuration information, and these complete LTM configuration information can be the cell identification information of the candidate cells under all candidate DUs and the LTM configuration information corresponding to each candidate cell.

[0100] Optionally, the third configuration information can be generated by the CU. The CU can also send the third configuration information to the source DU where the source cell is located. The DU where the source cell is located is the source DU (S-DU), and the source cell can be the current serving cell.

[0101] In the LTM configuration method provided by the embodiments of the present application, each candidate DU sends the cell identification information of all candidate cells under the candidate DU and the LTM configuration information corresponding to each candidate cell to the CU. The third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs. Thus, when the source DU obtains the third configuration information, it can send the LTM configuration information of the candidate cells under all candidate DUs to the UE to accurately determine the target cell or target beam to be switched by the UE and ensure link success / beam success.

[0102] In some embodiments, the trigger condition for sending the first configuration information to the CU includes: obtaining an LTM configuration request.

[0103] In this embodiment, each candidate DU among all candidate DUs can determine that LTM needs to be configured after receiving the LTM configuration request sent by the CU, so that each candidate DU sends the first configuration information to the CU. That is, before step S102, there may also be a step of receiving the LTM configuration request sent by the CU.

[0104] In an alternative embodiment, each candidate DU obtains the LTM configuration request, generates the second configuration information, and provides the cell identification information of all candidate cells under this candidate DU and the second configuration information corresponding to each candidate cell as the first configuration information to the CU.

[0105] In some embodiments, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting the configuration of LTM; reference configuration information.

[0106] In this embodiment, the LTM configuration request can be carried by an F1 interface message. For example, a UE context establishment request message. The LTM configuration request contains at least one of the cell identification information of the candidate cell, the PCI information and frequency point information corresponding to the candidate cell, the CGI information of the candidate cell, the identification information for requesting the configuration of LTM, and the reference configuration information (RRC reconfiguration message). Through the LTM configuration request, the candidate DU can determine that it needs to configure LTM for the candidate cell requested by the CU, so that each candidate DU sends the first configuration information to the CU.

[0107] In some embodiments, the cell identification information includes at least one of the following: LTM candidate configuration identifier; frequency point information and / or PCI; identification information of the candidate DU.

[0108] In this embodiment, the cell identification information is used to identify the candidate cell, so that the candidate DU can configure LTM for the candidate cell requested by the CU. As Figure 2 shown, there may be two cases for the cell identification information of candidate cell #1: ① LTM candidate configuration identifier and / or identification information of the candidate DU; ② frequency point information and / or physical cell identifier, and / or identification information of the candidate DU.

[0109] In some embodiments, the LTM configuration information includes at least one of the following: TRS configuration information; association relationship configuration information between TRS and SSB; power control configuration information; indication information for indicating whether multiple TAs are configured.

[0110] In this embodiment, the LTM configuration information may include LTM candidate configuration (RRC reconfiguration message), L1 measurement SSB configuration information, TCI configuration information, and may also include at least one of TRS configuration information, the association relationship configuration information between TRS and SSB, power control configuration information, and indication information. Through the LTM configuration information of the candidate cell, the UE can determine which TA calculated from which SSB to calculate or adopt for transmitting the initial uplink data, so as to accurately determine the target cell or target beam to be switched by the UE and ensure link success / beam success. As Figure 2 shown, the second configuration information of candidate cell #1 is the LTM configuration information for candidate cell #1, including: TCI configuration information, L1 measurement SSB configuration information, TRS configuration information, the association relationship configuration information between TRS and SSB, power control configuration information, and indication information.

[0111] Optionally, the indication information is used to indicate whether multiple TAs are configured. For example, 2TAs. The indication information can be represented by a bool variable, where 0 represents configured and 1 represents not configured; or it can be represented by true / false, where true represents configured and false represents not configured; or if the LTM configuration information carries the indication information, it means multiple TAs are configured, and if the indication information is not carried in the LTM configuration information, it means multiple TAs are not configured.

[0112] In some embodiments, the TRS configuration information includes at least one of the following: the resource set configuration information of the TRS; the resource configuration information of the TRS included in each resource set; the subcarrier spacing of the TRS; the reference frequency point of the TRS; the cyclic prefix length; the configuration attribute of the TRS; the QCL indication information.

[0113] In this embodiment, the reference frequency point of the TRS may be the point A configuration information. The configuration attribute of the TRS may include periodic, aperiodic, semi-persistent, etc. The QCL indication information may be used to indicate the QCL type. By configuring the TRS, the UE can correctly receive downlink data.

[0114] In an alternative implementation, QCL may mean that the large-scale parameters of the channel experienced by the symbols on a certain antenna port can be inferred from the channel experienced by the symbols on another antenna port. The large-scale parameters may include delay spread, average delay, Doppler spread, Doppler shift, average gain, and spatial reception parameters, etc. Considering the possible QCL relationships between the reference signals, from the perspective of simplifying the signaling, the above several channel large-scale parameters are divided into the following four types in NR to facilitate network configuration according to different scenarios:

[0115] QCL type A: includes Doppler shift, Doppler spread, average delay, and delay spread;

[0116] QCL type B: including Doppler shift and Doppler spread;

[0117] QCL type C: including Doppler shift and average delay;

[0118] QCL type D: including spatial reception parameters.

[0119] For the reception of a target reference signal, the UE needs to obtain the required large-scale parameters from one or more QCL source reference signals. For example, the UE obtains time and frequency parameters from one QCL source reference signal and spatial reception parameters from another QCL source reference signal. Therefore, before the UE receives the target reference signal, the network needs to configure its QCL source reference signal and the QCL type between the target reference signal and the source reference signal for it through signaling. To configure the QCL relationship between reference signals, NR introduces Transmission Configuration Indication, abbreviated as TCI state. The structure of the TCI state is {RS1|QCL-Type1,RS2|QCL-Type2} or {RS1|QCL-Type1}, where RS1 and RS2 are the identification information of the reference signals, and QCL-Type1 and QCL-Type2 are the QCL types. Each TCI state can include one or two downlink reference signals and the corresponding QCL types.

[0120] In some embodiments, the configuration information of the association relationship between the TRS and the SSB includes: the explicit configuration method of the association relationship between the TRS and the SSB; and / or, the implicit configuration method of the association relationship between the TRS and the SSB.

[0121] In this embodiment, the association relationship between the TRS and the SSB can be configured by using the explicit configuration method and / or the implicit configuration method, which ensures the flexibility of the configuration of the association relationship between the TRS and the SSB.

[0122] In some embodiments, the explicit configuration method includes: for the TRS in the TCI configuration with the TRS configured as the QCL type D source reference signal, configuring the SSB identifier having a QCL type D association with the TRS; for the TRS in the TCI configuration with the TRS configured as any QCL type, configuring the SSB identifier having a corresponding QCL association with the TRS, and the QCL type can be QCL type A / B / C / D.

[0123] In this embodiment, when configuring the association relationship between the TRS and the SSB by using the explicit configuration method, two implementation methods can be included, as can be Figure 3 shown.

[0124] In the first method, for a TCI configuration with TRS as the source reference signal, each TRS in this TCI configuration carries the SSB identifier associated with this TRS. By default, only the spatial relationship, that is, the beam information, is indicated. That is, each TRS carries the SSB identifier that has the same receiving beam as this TRS. As Figure 3 shown in (a) of Figure 3 , the protocol stipulates that the indicated SSB must be the SSB identifier associated with the TRS with QCL type D association.

[0125] In the second method, for a TCI configuration with TRS as the source reference signal, each TRS in this TCI configuration carries the SSB identifier associated with this TRS. This configuration is indicated per QCL type. That is, for each TRS, for different types of QCL types, the corresponding associated SSB identifiers are respectively indicated. As Figure 3 shown in (b) of Figure 3 , if TRS x is configured as the source QCL RS of the TCI, and the QCL types for configuring this TRS x as the source QCL RS of the TCI include type A and type B, then the candidate DU will respectively indicate SSB x that has a QCL type A led relationship with this TRS, and SSB y that has a QCL type B led relationship with this TRS.

[0126] In some embodiments, the implicit configuration method includes at least one of the following: in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is SSB; in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is SSB.

[0127] In this embodiment, when configuring the association relationship between the TRS and the SSB using the implicit configuration method, two implementation methods can be included, which can be as Figure 4 shown.

[0128] In the first method, when the candidate DU provides the TRS configuration of the candidate cell, it is necessary to ensure that the TCI pointed to by the QCL indication information in the TRS configuration of each candidate cell satisfies: the source reference signal of QCL type D therein is SSB.

[0129] In the second method, when the candidate DU provides the TRS configuration of the candidate cell, it is necessary to ensure that the TCI pointed to by the QCL indication information in the TRS configuration of each candidate cell satisfies: the source reference signal of any QCL type therein is SSB.

[0130] In some embodiments, the power control configuration information includes at least one of the following: path loss reference signal configuration information; power control parameter configuration information for uplink signals or uplink channels.

[0131] In this embodiment, the power control parameters for uplink signals or uplink channels may be parameters such as P0 and Alpha.

[0132] In some embodiments, an LTM configuration method is provided, which is applied to a CU. Figure 5 As shown in the flowchart of another LTM configuration method provided by the embodiments of the present application, Figure 5 as shown, the method mainly includes the following steps:

[0133] S500: Receive first configuration information from a candidate DU.

[0134] In this step, the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell.

[0135] Optionally, the CU may send an LTM configuration request to all candidate DUs associated with the CU. Each candidate DU receives the LTM configuration request, determines that it is necessary to configure LTM for the candidate cells requested by the CU, and thus each candidate DU generates second configuration information corresponding to each candidate cell, and provides the cell identification information of all candidate cells under the candidate DU and the second configuration information corresponding to each candidate cell as the first configuration information to the CU.

[0136] Optionally, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting LTM configuration; reference configuration information.

[0137] Optionally, the cell identification information includes at least one of the following: LTM candidate configuration identification; frequency point information and / or PCI; identification information of the candidate DU.

[0138] S502: Determine third configuration information.

[0139] In this step, the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU, that is, the third configuration information includes complete LTM configuration information, and these complete LTM configuration information may be cell identification information of candidate cells under all candidate DUs and LTM configuration information corresponding to each candidate cell.

[0140] Optionally, the LTM configuration information includes at least one of the following: TRS configuration information; association relationship configuration information between TRS and SSB; power control configuration information; indication information for indicating whether multiple TAs are configured; the LTM configuration information may further include at least one of the following: LTM candidate configuration (RRC reconfiguration message), L1 measurement SSB configuration information, TCI configuration information.

[0141] S504: Send the third configuration information to each candidate DU.

[0142] In this step, after the CU determines the third configuration information, it can send the third configuration information to each candidate DU, so as to enable the UE to continuously switch cells. In Figure 5 the candidate DUs may include candidate DU#1 and candidate DU#2.

[0143] In the LTM configuration method provided by the embodiments of this application, each candidate DU will send the cell identification information of all candidate cells under this candidate DU and the LTM configuration information corresponding to each candidate cell to the CU. The third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs. Thus, the source DU can obtain the third configuration information to send the LTM configuration information of the candidate cells under all candidate DUs to the UE, so as to accurately determine the target cell or target beam to be switched by the UE and ensure link success / beam success. At the same time, the CU can also send the third configuration information to each candidate DU, so as to enable the UE to continuously switch cells.

[0144] In some embodiments, determining the third configuration information includes: sending the first configuration information to the source DU where the source cell is located; receiving the third configuration information from the source DU; or, generating the third configuration information based on the first configuration information.

[0145] In this embodiment, after receiving the first configuration information, the CU can send the first configuration information to the source DU where the source cell is located; after receiving the first configuration information, the source DU generates the third configuration information and provides it to the CU, which can reduce the calculation amount of the CU. As Figure 6 shown, this method mainly includes the following steps:

[0146] S600: Receive the first configuration information from the candidate DU.

[0147] The description of this step can refer to S500 and will not be elaborated here.

[0148] Step S602: Send the first configuration information to the source DU where the source cell is located.

[0149] Step S604: Receive the third configuration information from the source DU.

[0150] Among them, S602 and S604 correspond to S502. That is to say, determining the third configuration information includes: sending the first configuration information to the source DU where the source cell is located, and receiving the third configuration information from the source DU.

[0151] Optionally, the third configuration information may include LTM-Candidate configuration information and / or LTM-Config configuration information.

[0152] S606: Send the third configuration information to each candidate DU.

[0153] The description of this step can refer to S504 and will not be elaborated here.

[0154] In an alternative embodiment, after receiving the first configuration information, the CU can also directly generate the third configuration information, which can reduce the interaction steps between the CU and the source DU. As Figure 7 shown, this method mainly includes the following steps:

[0155] S700: Receive the first configuration information from the candidate DU.

[0156] The description of this step can refer to S500 and will not be elaborated here.

[0157] S702: Generate the third configuration information based on the first configuration information.

[0158] In some embodiments, after generating the third configuration information based on the first configuration information, it further includes: sending the third configuration information to the source DU.

[0159] In this embodiment, if the CU directly generates the third configuration information after receiving the first configuration information, then in addition to sending the third configuration information to each candidate DU among at least one candidate DU, the CU also needs to send the third configuration information to the source DU. When the source DU obtains the third configuration information, it can send the LTM configuration information of the candidate cells under all candidate DUs to the UE to accurately determine the target cell or target beam to be switched by the UE and ensure link success / beam success. As Figure 7 shown, this method may further include step S704: Send the third configuration information to the source DU.

[0160] Among them, S702 and S704 correspond to S502. That is to say, determining the third configuration information includes: generating the third configuration information based on the first configuration information, and sending the third configuration information to the source DU.

[0161] S706: Send the third configuration information to each candidate DU.

[0162] The description of this step can refer to S504 and will not be elaborated here.

[0163] In some embodiments, a method for configuring LTM is provided, which is applied to a source DU where a source cell is located. Figure 8 The flowchart of another method for configuring LTM provided by the embodiments of the present application is as Figure 8 shown, and the method mainly includes the following steps:

[0164] S802: Generate third configuration information based on the first configuration information.

[0165] In this step, the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell. The third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU. That is, the third configuration information includes complete LTM configuration information, and these complete LTM configuration information may be cell identification information of candidate cells under all candidate DUs and LTM configuration information corresponding to each candidate cell.

[0166] Optionally, the LTM configuration information includes at least one of the following: TRS configuration information; association relationship configuration information between the TRS and the SSB; power control configuration information; indication information for indicating whether multiple TAs are configured; the LTM configuration information may further include at least one of the following: LTM candidate configuration (RRC reconfiguration message), L1 measurement SSB configuration information, TCI configuration information.

[0167] In some embodiments, a method for configuring LTM is provided, which is applied to a source DU where a source cell is located. Figure 9 The flowchart of another method for configuring LTM provided by the embodiments of the present application is as Figure 9 shown, and the method mainly includes the following steps:

[0168] S902: Receive the third configuration information from the CU.

[0169] In this step, after receiving the first configuration information, the CU may also directly generate the third configuration information. The CU provides the generated third configuration information to the source DU and all candidate DUs.

[0170] In the LTM configuration method provided by the embodiment of the present application, each candidate DU sends the LTM configuration information of the candidate cells under this candidate DU to the CU. The third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs. Thus, the source DU where the source cell is located can obtain the third configuration information to send the LTM configuration information of the candidate cells under all candidate DUs to the UE, so as to accurately determine the target cell or target beam to be switched by the UE and ensure link success / beam success. At the same time, the CU can also send the third configuration information to each candidate DU among at least one candidate DU, so as to facilitate the continuous cell switching of the UE.

[0171] In some embodiments, before generating the third configuration information based on the first configuration information from the CU, it further includes: receiving the first configuration information from the CU.

[0172] In this embodiment, the CU can send an LTM configuration request to each candidate DU. Each candidate DU receives the LTM configuration request and determines that it is necessary to configure LTM for the candidate cells requested by the CU. Thus, each candidate DU generates the second configuration information corresponding to each candidate cell, and takes the cell identification information of all candidate cells under this candidate DU and the second configuration information corresponding to each candidate cell as the first configuration information, and provides it to the CU. After receiving the first configuration information, the CU sends the received first configuration information to the source DU. As Figure 8 shown, before step S802, it may further include step S800: receiving the first configuration information from the CU.

[0173] Optionally, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting LTM configuration; reference configuration information.

[0174] Optionally, the cell identification information includes at least one of the following: LTM candidate configuration identifier; frequency point information and / or PCI; identification information of the candidate DU.

[0175] In some embodiments, after generating the third configuration information, it further includes: sending the third configuration information to the CU.

[0176] In this embodiment, if the CU sends the received first configuration information to the source DU, and the source DU generates the third configuration information based on the first configuration information, then after generating the third configuration information, the source DU may further send the third configuration information to the CU, so that the CU can send the third configuration information to all candidate DUs, thereby realizing the continuous cell switching of the UE. As Figure 8 shown, after step S802, it may further include step S804: sending the third configuration information to the CU.

[0177] In some embodiments, it further includes: sending a handover command carrying the association relationship between the TRS and the SSB to the user equipment UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

[0178] In this embodiment, the LTM configuration information of the candidate cell includes the association relationship between the TRS and the SSB, so that the source DU can send a handover command carrying the association relationship between the TRS and the SSB to the UE, for example, LTM cell switch MACCE. The TRS is the QCL source reference signal in the TCI to be handed over indicated by the network to the UE. The UE determines which TA calculated from the corresponding SSB to calculate or adopt for sending the initial uplink data according to the association relationship between the TRS and the SSB, and the information of the target cell to be handed over and its beam information, so as to accurately determine the target cell or target beam to be handed over by the UE and ensure link success / beam success.

[0179] In some embodiments, the triggering condition for sending a handover command carrying the association relationship between the TRS and the SSB to the UE includes: determining that the target cell to be handed over is configured with 2TA according to the third configuration information.

[0180] In this embodiment, when triggering the LTM cell handover, the source DU can, under the condition that it is determined according to the third configuration information that the target cell to be handed over is configured with 2TA, send the triggering condition of the handover command carrying the association relationship between the TRS and the SSB to the UE, so as to ensure the success rate of the UE's cell handover.

[0181] In some embodiments, the handover command further includes at least one of the following: cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identification of the target cell.

[0182] In this embodiment, in addition to carrying the association relationship between the TRS and the SSB, the handover command can also indicate the cell identification information of the target cell, the TCI indication of the target cell (indicating that the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command), the TA value of the target cell, the TAG identification of the target cell, etc., which can further ensure the success rate of the UE's cell handover.

[0183] The LTM configuration method of the present application can enable the network side to accurately determine the target cell or target beam to be handed over by the UE according to the L1 measurement results reported by the UE in the LTM scenario, ensure link success / beam success, and avoid the occurrence of blind handover.

[0184] In some embodiments, an LTM configuration device is provided, which is applied to a candidate DU where a candidate cell is located.

[0185] Figure 10 As shown in the schematic structural diagram of an LTM configuration device provided by an embodiment of this application, Figure 10 as shown, the LTM configuration device 1000 includes:

[0186] A sending module 1001, configured to send first configuration information to a CU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell;

[0187] A receiving module 1002, configured to receive third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0188] In some embodiments, the cell identification information includes at least one of the following: an LTM candidate configuration identifier; frequency point information and / or PCI; identification information of the candidate DU.

[0189] In some embodiments, the LTM configuration information includes at least one of the following: TRS configuration information; configuration information on the association relationship between the TRS and the SSB; power control configuration information; indication information for indicating whether multiple TAs are configured.

[0190] In some embodiments, the TRS configuration information includes at least one of the following: resource set configuration information of the TRS; resource configuration information of the TRS included in each resource set; subcarrier spacing of the TRS; reference frequency point of the TRS; cyclic prefix length; configuration attribute of the TRS; QCL indication information.

[0191] In some embodiments, the configuration information on the association relationship between the TRS and the SSB includes: an explicit configuration method for the association relationship between the TRS and the SSB; and / or, an implicit configuration method for the association relationship between the TRS and the SSB.

[0192] In some embodiments, the explicit configuration method includes: for the TRS in the TCI configuration where the TRS is configured as the QCL type D source reference signal, configuring the SSB identifier having a QCL type D association with the TRS; for the TRS in the TCI configuration where the TRS is configured as the TCI of any QCL type, configuring the SSB identifier having a corresponding QCL association with the TRS, and the QCL type can be QCL type A / B / C / D.

[0193] In some embodiments, the implicit configuration method includes at least one of the following: in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; in the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

[0194] In some embodiments, the power control configuration information includes at least one of the following: path loss reference signal configuration information; power control parameter configuration information for the uplink signal or uplink channel.

[0195] In some embodiments, the trigger condition for sending the first configuration information to the CU includes: obtaining an LTM configuration request.

[0196] In some embodiments, the LTM configuration request includes at least one of the following: cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; CGI information of the candidate cell; identification information for requesting the configuration of LTM; reference configuration information.

[0197] In some embodiments, a device for configuring LTM is provided, which is applied to the CU.

[0198] Figure 11 As shown in Figure 11 the structural schematic diagram of another device for configuring LTM provided by the embodiments of the present application, the LTM configuration device 1100 includes:

[0199] A receiving module 1101, configured to receive first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell;

[0200] A determining module 1102, configured to determine third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU;

[0201] A sending module 1103, configured to send the third configuration information to each candidate DU.

[0202] In some embodiments, when determining the third configuration information, the determining module 1102 is specifically configured to: send the first configuration information to the source DU where the source cell is located; receive the third configuration information from the source DU; or, generate the third configuration information based on the first configuration information.

[0203] In some embodiments, the sending module 1103 is further configured to send the third configuration information to the source DU after generating the third configuration information based on the first configuration information.

[0204] In some embodiments, an LTM configuration device is provided, which is applied to a source DU where a source cell is located.

[0205] Figure 12 FIG. is a schematic structural diagram of another LTM configuration device provided by an embodiment of the present application. As Figure 12 shown, the LTM configuration device 1200 includes:

[0206] A processing module 1201, configured to perform the following operations:

[0207] Based on first configuration information from a CU, generate third configuration information. The first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell. The second configuration information includes LTM configuration information of the candidate cell;

[0208] Or, receive third configuration information from the CU. The third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

[0209] In some embodiments, the LTM configuration device 1200 further includes: a receiving module (not shown), configured to receive the first configuration information from the CU before generating the third configuration information based on the first configuration information from the CU.

[0210] In some embodiments, the LTM configuration device 1200 further includes: a sending module (not shown), configured to send the third configuration information to the CU after generating the third configuration information.

[0211] In some embodiments, the sending module is further configured to send a handover command carrying the association relationship between a TRS and an SSB to a UE. The TRS is any QCL type source reference signal in a TCI carried in the handover command, or the TRS is a source reference signal of QCL type D in the TCI carried in the handover command.

[0212] In some embodiments, the triggering condition for sending a handover command carrying the association relationship between a TRS and an SSB to a UE includes: determining that a target cell to be handed over is configured with 2TAs according to the third configuration information.

[0213] In some embodiments, the handover command further includes at least one of the following: cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identifier of the target cell.

[0214] It should be noted that the division of units in the embodiments of the present application is illustrative, merely a logical function division, and there may be other division methods in actual implementation. In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, may exist separately physically for each unit, or two or more units may be integrated in one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0215] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0216] It should be noted here that the above device provided in the embodiments of the present invention can implement all the method steps implemented in the above method embodiments and can achieve the same technical effects. Therefore, the same parts and beneficial effects as those in the method embodiments will not be specifically described in this embodiment.

[0217] In some embodiments, an LTM configuration device is also provided.

[0218] Figure 13 FIG. is a schematic structural diagram of an LTM configuration device provided in an embodiment of the present application. As Figure 13 shown, the LTM configuration device includes: a memory 1311, a transceiver 1312, and a processor 1313.

[0219] The memory 1311 is used to store a computer program;

[0220] The transceiver 1312 is used to receive and send data under the control of the processor 1313.

[0221] Among them, in Figure 13Among them, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 1313 and memory represented by memory 1311. The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be further described herein. The bus interface provides an interface. The transceiver 1312 can be multiple components, that is, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, and these transmission media include wireless channels, wired channels, optical fiber cables, and other transmission media. The processor 1313 is responsible for managing the bus architecture and general processing, and the memory 1311 can store data used by the processor 1313 when performing operations.

[0222] The processor 1313 can be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD). The processor can also adopt a multi-core architecture.

[0223] The processor 1313 reads the computer program in the memory 1311 and performs the following operations:

[0224] Send the first configuration information to the CU. The first configuration information includes the cell identification information of all candidate cells under the candidate DU and the second configuration information corresponding to each candidate cell. The second configuration information includes the LTM configuration information of the candidate cell;

[0225] Receive the third configuration information from the CU. The third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs associated with the CU.

[0226] In some embodiments, the cell identification information includes at least one of the following:

[0227] LTM candidate configuration identifier;

[0228] Frequency point information and / or PCI;

[0229] The identification information of the candidate DU.

[0230] In some embodiments, the LTM configuration information includes at least one of the following:

[0231] Tracking reference signal (TRS) configuration information;

[0232] Configuration information on the association relationship between TRS and synchronization signal block (SSB);

[0233] Power control configuration information;

[0234] Indication information for indicating whether multiple timing advances (TAs) are configured.

[0235] In some embodiments, the TRS configuration information includes at least one of the following:

[0236] Resource set configuration information of TRS;

[0237] Resource configuration information of TRS included in each resource set;

[0238] Subcarrier spacing of TRS;

[0239] Reference frequency point of TRS;

[0240] Cyclic prefix length;

[0241] Configuration attributes of TRS;

[0242] Quasi - co - location (QCL) indication information.

[0243] In some embodiments, the configuration information on the association relationship between TRS and SSB includes: explicit configuration methods for the association relationship between TRS and SSB; and / or, implicit configuration methods for the association relationship between TRS and SSB.

[0244] In some embodiments, the explicit configuration methods include:

[0245] For the TRS in the transmission configuration indicator (TCI) configured with TRS as the QCL type D source reference signal, configure the SSB identifier having a QCL type D association with the TRS;

[0246] For the TRS in the TCI configured with TRS as the TCI of any QCL type, configure the SSB identifier having the corresponding QCL association with the TRS, and the QCL type can be QCL type A / B / C / D.

[0247] In some embodiments, the implicit configuration methods include at least one of the following:

[0248] In the TCI indicated by the QCL indication information carried by TRS, the source reference signal of QCL type D is SSB;

[0249] In the TCI indicated by the QCL indication information carried by TRS, the source reference signal of any QCL type carried by the TCI is SSB.

[0250] In some embodiments, the power control configuration information includes at least one of the following:

[0251] Path loss reference signal configuration information;

[0252] Power control parameter configuration information for uplink signals or uplink channels.

[0253] In some embodiments, the trigger condition for sending the first configuration information to the CU includes:

[0254] An LTM configuration request is obtained.

[0255] In some embodiments, the LTM configuration request includes at least one of the following:

[0256] Cell identification information of the candidate cell;

[0257] PCI information and frequency point information corresponding to the candidate cell;

[0258] Global cell identification code (CGI) information of the candidate cell;

[0259] Identification information for requesting the configuration of LTM;

[0260] Reference configuration information.

[0261] In some embodiments, an LTM configuration device is further provided.

[0262] Figure 14 As shown in the following figure, which is a schematic structural diagram of another LTM configuration device provided by the embodiments of the present application. The LTM configuration device includes: a memory 1411, a transceiver 1412, and a processor 1413. Figure 14 As shown, the LTM configuration device includes: a memory 1411, a transceiver 1412, and a processor 1413.

[0263] The memory 1411 is used to store computer programs;

[0264] The transceiver 1412 is used to receive and send data under the control of the processor 1413.

[0265] Among them, in Figure 14Among them, the bus architecture may include any number of interconnected buses and bridges, specifically, various circuits represented by one or more processors represented by processor 1413 and memory represented by memory 1411 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, so they will not be further described herein. The bus interface provides an interface. The transceiver 1412 may be multiple components, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium, and these transmission mediums include wireless channels, wired channels, optical fiber cables and other transmission mediums. The processor 1413 is responsible for managing the bus architecture and general processing, and the memory 1411 may store data used by the processor 1413 when executing operations.

[0266] The processor 1413 may be a CPU, ASIC, FPGA or CPLD, and the processor may also adopt a multi-core architecture.

[0267] The processor 1413 operates by reading a computer program in the memory 1411 and performing the following operations:

[0268] Receiving first configuration information from a candidate DU, the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell;

[0269] Determining third configuration information, the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU;

[0270] Sending the third configuration information to each candidate DU.

[0271] In some embodiments, determining the third configuration information includes:

[0272] Sending the first configuration information to the source DU where the source cell is located; receiving the third configuration information from the source DU; or,

[0273] Generating the third configuration information based on the first configuration information.

[0274] In some embodiments, after generating the third configuration information based on the first configuration information, it further includes:

[0275] Sending the third configuration information to the source DU.

[0276] In some embodiments, there is also provided an LTM configuration device.

[0277] Figure 15 For another structural schematic diagram of the LTM configuration device provided by the embodiments of the present application, as Figure 15As shown, the LTM configuration device includes: a memory 1511, a transceiver 1512, and a processor 1513.

[0278] The memory 1511 is used to store computer programs;

[0279] The transceiver 1512 is used to receive and send data under the control of the processor 1513.

[0280] Among them, in Figure 15 the bus architecture may include any number of interconnected buses and bridges, specifically, various circuits represented by one or more processors represented by the processor 1513 and the memory represented by the memory 1511 are linked together. The bus architecture can also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, so they will not be further described herein. The bus interface provides an interface. The transceiver 1512 can be multiple components, that is, including a transmitter and a receiver, and provides a unit for communicating with various other devices on a transmission medium, and these transmission mediums include wireless channels, wired channels, optical fiber cables, etc. The processor 1513 is responsible for managing the bus architecture and general processing, and the memory 1511 can store the data used by the processor 1513 when performing operations.

[0281] The processor 1513 can be a CPU, ASIC, FPGA, or CPLD, and the processor can also adopt a multi-core architecture.

[0282] The processor 1513 reads the computer program in the memory 1511 and performs the following operations:

[0283] Based on the first configuration information from the CU, generate the third configuration information. The first configuration information includes the cell identification information of all candidate cells under a candidate DU associated with the CU and the second configuration information corresponding to each candidate cell. The second configuration information includes the LTM configuration information of the candidate cell;

[0284] Or, receive the third configuration information from the CU. The third configuration information includes the LTM configuration information of the candidate cells under all candidate DUs associated with the CU.

[0285] In some embodiments, before generating the third configuration information based on the first configuration information from the CU, it further includes: receiving the first configuration information from the CU.

[0286] In some embodiments, after generating the third configuration information, it further includes:

[0287] Sending the third configuration information to the CU.

[0288] In some embodiments, it further includes:

[0289] Send a handover command carrying the association relationship between the TRS and the SSB to the UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

[0290] In some embodiments, the triggering conditions for sending a handover command carrying the association relationship between the TRS and the SSB to the UE include:

[0291] Determine according to the third configuration information that the target cell to be handed over is configured with 2TA.

[0292] In some embodiments, the handover command further includes at least one of the following:

[0293] Cell identification information of the target cell;

[0294] TCI indication of the target cell;

[0295] TA value of the target cell;

[0296] TAG identifier of the target cell.

[0297] In some embodiments, a processor-readable storage medium is further provided. The processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute the method in any one of the method embodiments.

[0298] The processor-readable storage medium can be any available medium or data storage device accessible by the processor, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical discs (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROM, EPROM, EEPROM, non-volatile memories (NAND FLASH), solid state drives (SSD)), etc.

[0299] In some embodiments, a computer program product is provided, including a computer program, and the computer program is used to cause the processor to execute the method in any one of the method embodiments.

[0300] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories and optical memories, etc.) containing computer-usable program codes.

[0301] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a means for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or a means for implementing the functions specified in one or more of the blocks.

[0302] These processor-executable instructions can also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the processor-readable memory produce a manufacture including an instruction means that implements the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or a means for implementing the functions specified in one or more of the blocks.

[0303] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

1. A method for configuring L1 / L2-triggered mobility LTM, characterized in that, Applied to the candidate distributed unit (DU) where the candidate cell is located, the LTM configuration method includes: Sending first configuration information to the central unit (CU), where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes the LTM configuration information of the candidate cell; Receiving third configuration information from the CU, where the third configuration information includes the LTM configuration information of candidate cells under all candidate DUs associated with the CU.

2. The LTM configuration method according to claim 1, wherein The cell identification information includes at least one of the following: LTM candidate configuration identifier; Frequency point information and / or physical cell identifier (PCI); Identification information of the candidate DU.

3. The LTM configuration method according to claim 1 or 2, characterized in that, The LTM configuration information includes at least one of the following: Tracking reference signal (TRS) configuration information; Configuration information on the association relationship between the TRS and the synchronization signal block (SSB); Power control configuration information; Indication information for indicating whether multiple timing advances (TAs) are configured.

4. The LTM configuration method according to claim 3, wherein The TRS configuration information includes at least one of the following: Resource set configuration information of the TRS; Resource configuration information of the TRS included in each resource set; Subcarrier spacing of the TRS; Reference frequency point of the TRS; Cyclic prefix length; Configuration attribute of the TRS; Quasi co-location (QCL) indication information.

5. The LTM configuration method according to claim 3, wherein The configuration information on the association relationship between the TRS and the SSB includes: the explicit configuration method of the association relationship between the TRS and the SSB; and / or, the implicit configuration method of the association relationship between the TRS and the SSB.

6. The LTM configuration method according to claim 5, wherein The explicit configuration method includes: For the TRS in the transmission configuration indicator (TCI) configured with the TRS as the QCL type D source reference signal, configuring the SSB identifier having a QCL type D association with the TRS; For the TRS in the TCI configured with the TRS as the TCI of any QCL type, configuring the SSB identifier having the corresponding QCL association with the TRS, and the QCL type can be QCL type A / B / C / D.

7. The LTM configuration method according to claim 5, wherein The implicit configuration method includes at least one of the following: In the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; In the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

8. The LTM configuration method according to claim 3, wherein, The power control configuration information includes at least one of the following: Path loss reference signal configuration information; Power control parameter configuration information for the uplink signal or uplink channel.

9. The LTM configuration method according to any one of claims 1 to 8, characterized in that The triggering condition for sending the first configuration information to the CU includes: Obtaining an LTM configuration request.

10. The LTM configuration method according to claim 9, wherein, The LTM configuration request includes at least one of the following: Cell identification information of the candidate cell; PCI information and frequency point information corresponding to the candidate cell; Global cell identification (CGI) information of the candidate cell; Identification information for requesting to configure the LTM; Reference configuration information.

11. A method for LTM configuration, characterized in that, Applied to the CU, the LTM configuration method includes: Receive first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Determine third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; Send the third configuration information to each candidate DU.

12. The LTM configuration method according to claim 11, wherein The determining the third configuration information includes: Send the first configuration information to a source DU where the source cell is located; receive the third configuration information from the source DU; or, Generate the third configuration information based on the first configuration information.

13. The LTM configuration method according to claim 12, wherein After generating the third configuration information based on the first configuration information, it further includes: Send the third configuration information to the source DU.

14. A method for configuring LTM, characterized in that, Applied to the source DU where the source cell is located, the LTM configuration method includes: Generate third configuration information based on first configuration information from the CU, where the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Or, receive the third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

15. The LTM configuration method according to claim 14, wherein Before generating the third configuration information based on the first configuration information from the CU, it further includes: Receive the first configuration information from the CU.

16. The LTM configuration method according to claim 14, wherein After generating the third configuration information, it further includes: Send the third configuration information to the CU.

17. The LTM configuration method according to any one of claims 14 to 16, characterized in that, It further includes: Send a handover command carrying the association relationship between the TRS and the SSB to the user equipment UE, where the TRS is a source reference signal of any QCL type in the TCI carried in the handover command, or the TRS is a source reference signal of QCL type D in the TCI carried in the handover command.

18. The LTM configuration method according to claim 17, wherein The trigger condition for sending a handover command carrying the association relationship between the TRS and the SSB to the UE includes: Determine according to the third configuration information that the target cell to be handed over is configured with 2TA.

19. The LTM configuration method according to claim 17, characterized in that, The handover command further includes at least one of the following: Cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; Timing advance group TAG identification of the target cell.

20. An LTM configuration device, characterized in that, Applied to the candidate DU where the candidate cell is located, the LTM configuration device includes: A sending module, configured to send first configuration information to the CU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; A receiving module, configured to receive third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

21. An LTM configuration device, characterized in that, Applied to the CU, the LTM configuration device includes: A receiving module, configured to receive first configuration information from a candidate DU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; A determining module, configured to determine third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; A sending module, configured to send the third configuration information to each candidate DU.

22. An LTM configuration device, characterized in that, Applied to a source DU where a source cell is located, the LTM configuration device includes: A processing module, configured to perform the following operations: Generate third configuration information based on first configuration information from the CU, where the first configuration information includes cell identification information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Or, receive the third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

23. An LTM configuration device, characterized in that, Including: A memory, a transceiver, and a processor: The memory is configured to store a computer program; The transceiver is configured to send and receive data under the control of the processor; The processor is configured to read the computer program in the memory and perform the following operations: Send first configuration information to the CU, where the first configuration information includes cell identification information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Receive the third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

24. The LTM configuration device according to claim 23, wherein The cell identification information includes at least one of the following: An LTM candidate configuration identifier; Frequency point information and / or PCI; Identification information of the candidate DU.

25. The LTM configuration device according to claim 23 or 24, characterized in that, The LTM configuration information includes at least one of the following: TRS configuration information; Association relationship configuration information between TRS and SSB; Power control configuration information; An indication information, used to indicate whether multiple TAs are configured.

26. The LTM configuration device according to claim 25, wherein The TRS configuration information includes at least one of the following: Resource set configuration information of the TRS; Resource configuration information of the TRS included in each resource set; Subcarrier spacing of the TRS; Reference frequency point of the TRS; Cyclic prefix length; Configuration attribute of the TRS; QCL indication information.

27. The LTM configuration device according to claim 25, wherein The association relationship configuration information between TRS and SSB includes: an explicit configuration method of the association relationship between TRS and SSB; and / or, an implicit configuration method of the association relationship between TRS and SSB.

28. The LTM configuration device according to claim 27, wherein The explicit configuration method includes: For the TRS in the TCI configuration where the TRS is configured as a QCL type D source reference signal, configure the SSB identifier having a QCL type D association with the TRS; For the TRS in a TCI configuration with TRS configured as any QCL type, configure an SSB identifier having a corresponding QCL association with the TRS, where the QCL type can be QCL type A / B / C / D.

29. The LTM configuration device according to claim 27, wherein The implicit configuration method includes at least one of the following: In the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of QCL type D is the SSB; In the TCI indicated by the QCL indication information carried by the TRS, the source reference signal of any QCL type carried by the TCI is the SSB.

30. The LTM configuration device according to claim 25, wherein The power control configuration information includes at least one of the following: Path loss reference signal configuration information; Power control parameter configuration information for an uplink signal or an uplink channel.

31. The LTM configuration device according to any one of claims 23 to 30, characterized in that, The trigger condition for sending the first configuration information to the CU includes: Obtaining an LTM configuration request.

32. The LTM configuration device according to claim 31, wherein The LTM configuration request includes at least one of the following: Cell identifier information of a candidate cell; PCI information and frequency point information corresponding to a candidate cell; CGI information of a candidate cell; Identifier information for requesting LTM configuration; Reference configuration information.

33. An LTM configuration device, characterized in that, Includes: A memory, a transceiver, a processor: The memory is used to store computer programs; The transceiver is used to transmit and receive data under the control of the processor; The processor is used to read the computer programs in the memory and perform the following operations: Receive first configuration information from a candidate DU, where the first configuration information includes cell identifier information of all candidate cells under the candidate DU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Determine third configuration information, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU; Send the third configuration information to each candidate DU.

34. The LTM configuration device according to claim 33, wherein The determining of the third configuration information includes: Send the first configuration information to the source DU where the source cell is located; receive the third configuration information from the source DU; or, Generate the third configuration information based on the first configuration information.

35. The LTM configuration device according to claim 34, characterized in that, After generating the third configuration information based on the first configuration information, it further includes: Send the third configuration information to the source DU.

36. An LTM configuration device, characterized in that, Includes: A memory, a transceiver, a processor: The memory is used to store computer programs; The transceiver is used to transmit and receive data under the control of the processor; The processor is used to read the computer programs in the memory and perform the following operations: Generate third configuration information based on first configuration information from the CU, where the first configuration information includes cell identifier information of all candidate cells under a candidate DU associated with the CU and second configuration information corresponding to each candidate cell, and the second configuration information includes LTM configuration information of the candidate cell; Or, receive the third configuration information from the CU, where the third configuration information includes LTM configuration information of candidate cells under all candidate DUs associated with the CU.

37. The LTM configuration device according to claim 36, wherein Before generating the third configuration information based on the first configuration information from the CU, it further includes: Receive the first configuration information from the CU.

38. The LTM configuration device according to claim 36, wherein After generating the third configuration information, it further includes: Send the third configuration information to the CU.

39. The LTM configuration device according to any one of claims 36 to 38, characterized in that It further includes: Send a handover command carrying the association relationship between the TRS and the SSB to the UE, where the TRS is any QCL type source reference signal in the TCI carried in the handover command, or the TRS is the source reference signal of QCL type D in the TCI carried in the handover command.

40. The LTM configuration device according to claim 39, wherein The trigger condition for sending a handover command carrying the association relationship between the TRS and the SSB to the UE includes: Determine according to the third configuration information that the target cell to be handed over is configured with 2TA.

41. The LTM configuration device according to claim 39, wherein The handover command further includes at least one of the following: Cell identification information of the target cell; TCI indication of the target cell; TA value of the target cell; TAG identification of the target cell.

42. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a computer program, and the computer program is used to cause the processor to execute the method according to any one of claims 1 to 19.

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