TA acquisition method and device, terminal equipment and network equipment

Abstract

Disclosed are a TA acquisition method and apparatus, a terminal device, and a network device, the method comprising: a terminal device receiving a first signaling sent by a network device, the first signaling being used for indicating or configuring or activating a first operation on a first cell, the first operation comprising at least one of the following: measurement, downlink synchronization, and uplink synchronization; and the terminal equipment executes a first operation on the first cell, and obtains the TA of the first cell based on the first operation.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a TA acquisition method and device, terminal equipment, and network equipment. Background Art

[0002] Cell switching will cause data transmission interruption delay (interruption time). In order to reduce data transmission interruption delay, the terminal device needs to perform downlink synchronization and uplink synchronization on the target cell to be switched before performing cell switching. Among them, the implementation of uplink synchronization depends on the acquisition of timing advance (TA), and how to manage the terminal device to obtain TA needs to be clarified. Summary of the invention

[0003] Embodiments of the present application provide a TA acquisition method and apparatus, terminal equipment, network equipment, chip, and computer-readable storage medium.

[0004] The TA acquisition method provided in the embodiment of the present application includes:

[0005] The terminal device receives a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization;

[0006] The terminal device performs a first operation on the first cell, and obtains the TA of the first cell based on the first operation.

[0007] The TA acquisition method provided in the embodiment of the present application includes:

[0008] The network device sends a first signaling to the terminal device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain the TA of the first cell.

[0009] The TA acquisition device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0010] A receiving unit, configured to receive a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization;

[0011] The determining unit is configured to perform a first operation on the first cell, and obtain a TA of the first cell based on the first operation.

[0012] The TA acquisition device provided in the embodiment of the present application is applied to a network device, and the device includes:

[0013] A sending unit is used to send a first signaling to a terminal device, wherein the first signaling is used to indicate, configure or activate a first operation on a first cell, wherein the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain a TA of the first cell.

[0014] The terminal device provided in an embodiment of the present application includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any one of the above-mentioned TA acquisition methods.

[0015] The network device provided in the embodiment of the present application includes: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any one of the above-mentioned TA acquisition methods.

[0016] The chip provided in the embodiment of the present application includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes any one of the above methods.

[0017] The computer-readable storage medium provided in the embodiments of the present application is used to store a computer program, and the computer program enables a computer to execute any one of the above methods.

[0018] In the technical solution of the embodiment of the present application, the network device instructs, configures or activates a first operation on the first cell through a first signaling, and the terminal device performs the first operation on the first cell and obtains the TA of the first cell based on the first operation. In this way, the network device manages the terminal device's acquisition of the TA through the first signaling, provides a guarantee for uplink synchronization before cell switching, and reduces the data transmission interruption delay caused by cell switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application;

[0020] Figure 2-1 is a flowchart of TA acquisition method 1;

[0021] Figure 2-2 is a flowchart of TA acquisition method 2;

[0022] Figure 3 This is a schematic diagram of the process of the TA acquisition method provided in the embodiment of the present application. Figure 1 ;

[0023] Figure 42 is a flow chart of the TA acquisition method provided in an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of the process of the TA acquisition method provided in the embodiment of the present application. Figure 3 ;

[0025] Figure 6 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0026] Figure 7-1 This is a schematic diagram of calculating TA2 provided in an embodiment of the present application. Figure 1 ;

[0027] Figure 7-2 is a second schematic diagram of calculating TA2 provided in an embodiment of the present application;

[0028] Figure 7-3 This is a schematic diagram of calculating TA2 provided in an embodiment of the present application. Figure 3 ;

[0029] Figure 8 This is a schematic diagram of the structure of the TA acquisition device provided in the embodiment of the present application. Figure 1 ;

[0030] Fig. 9 This is a second schematic diagram of the structure of the TA acquisition device provided in an embodiment of the present application;

[0031] Fig.10 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0032] Fig.11 It is a schematic structural diagram of the chip of an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0035] like Figure 1 As shown, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface.

[0036] It should be understood that the embodiments of the present application are only exemplified by the communication system 100, but the embodiments of the present application are not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

[0037] exist Figure 1 In the communication system 100 shown, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area, and may communicate with the terminal device 110 (eg, UE) located in the coverage area.

[0038] The network device 120 may be a base station (gNB) in the NR system, or a network device in a future evolved public land mobile network (PLMN), etc.

[0039] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0040] For example, the terminal device 110 may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0041] It should be noted that Figure 1It is only to illustrate the system to which the present application is applicable in the form of an example. Of course, the method shown in the embodiment of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiment of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, B can be obtained through C; it can also mean that there is an association relationship between A and B. It should also be understood that the "correspondence" mentioned in the embodiment of the present application can mean that there is a direct or indirect correspondence relationship between the two, or it can mean that there is an association relationship between the two, or it can mean that there is an indication and being indicated, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined may refer to the definition in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, such as the NR protocol and related protocols used in future communication systems, which is not limited in the present application.

[0042] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application.

[0043] In the mobility enhancement project, mobility enhancement based on layer 1 / layer 2 measurement is introduced, hoping to reduce the data transmission interruption delay (interruption time) caused by the terminal device when switching cells. By performing downlink synchronization and uplink synchronization on the target cell to be switched before cell switching, the data transmission interruption delay can be effectively reduced. Among them, the implementation of uplink synchronization depends on the acquisition of TA. For the acquisition of TA, the relevant projects agreed to acquire TA before cell switching. The acquisition of TA can include two methods, one is the random access channel (Random Access Channel, RACH) method, that is, the TA of the target cell is acquired based on the transmission of the physical random access channel (Physical Random Access Channel, PRACH), and the other is the RACH less method, that is, the TA of the target cell is not acquired based on the transmission of PRACH. The two methods are explained below:

[0044] TA acquisition method 1: The terminal device sends PRACH to the target cell, so that the target cell measures the TA and sends the measured TA to the terminal device.

[0045] TA acquisition method 2: The terminal device calculates the TA through the time difference between two cells or the time difference of signal transmission arrival from two cells.

[0046] For the above-mentioned TA acquisition method 1, the terminal device sends PRACH to the target cell. When the target cell receives PRACH and measures TA, the TA can be directly informed to the terminal device, or the serving cell informs the terminal device of the TA, so that the terminal device can obtain the TA of the target cell.

[0047] like Figure 2-1 As shown, the specific process includes the following steps:

[0048] 1) The serving cell instructs the UE to send PRACH to the candidate cell.

[0049] 2) The UE sends PRACH to the candidate cell according to the instruction of the serving cell.

[0050] 3-1) The candidate cell informs the UE of the obtained TA.

[0051] 3-2) The candidate cell informs the serving cell of the obtained TA.

[0052] 4) The serving cell informs the UE of the TA of the candidate cell.

[0053] 5) The serving cell sends a handover command to the UE, informing the UE to handover to the target cell (ie, the candidate cell).

[0054] Here, before the UE performs cell switching, the serving cell can know that the UE has acquired the TA of the target cell, so that a switching command can be sent to allow the UE to switch to the target cell.

[0055] For the above TA acquisition method 2, the TA is acquired by the terminal device, so the serving cell does not know whether the terminal device has acquired the TA of the target cell. Therefore, the serving cell does not know whether it can send a handover command to the terminal device.

[0056] like Figure 2-2 As shown, the specific process includes the following steps:

[0057] 1), 2), 3) The serving cell sends a downlink signal, the candidate cell #1 sends a downlink signal, and the candidate cell #2 sends a downlink signal. The downlink signal may be a synchronization signal block (Synchronization Signal / PBCH Block, SSB) or other downlink signals.

[0058] 4) The UE calculates the TA of candidate cell #1 based on the time difference between the downlink signal reception between the serving cell and candidate cell #1 and the TA of the serving cell; the UE calculates the TA of candidate cell #2 based on the time difference between the downlink signal reception between the serving cell and candidate cell #2 and the TA of the serving cell.

[0059] After 4), the serving cell does not know whether the UE has obtained the TA of the target cell (eg, candidate cell #1 or candidate cell #2).

[0060] 5) The serving cell sends a handover command to the UE, informing the UE to handover to the target cell.

[0061] Here, by measuring the downlink signals of multiple cells, the UE can obtain the arrival time of the downlink signals from each cell, and then obtain the time difference of the downlink signal reception of each candidate cell compared to the serving cell. The UE can calculate the TA from the UE to each candidate cell through this time difference. However, the serving cell has no way of knowing when the UE completes obtaining the TA, resulting in the service cell being unable to clearly know when to send a switching command to the UE. In addition, in some scenarios, due to factors such as the downlink timing error between cells and the conversion time between uplink and downlink in the implementation of the cell, the TA of the candidate cell cannot be accurately obtained based solely on the time difference of the downlink signal reception of multiple cells.

[0062] To this end, the following technical solutions of the embodiments of the present application are proposed.

[0063] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0064] It should be noted that the “network device” described in the embodiments of the present application may be a base station or a transmission node corresponding to a service cell.

[0065] It should be noted that the “first cell” described in the embodiments of the present application may be a “candidate cell” or a “target cell”.

[0066] It should be noted that the "second cell" described in the embodiments of the present application may be a "reference cell" or a "serving cell" or a "target cell" or a "candidate cell".

[0067] It should be noted that the "third cell" described in the embodiments of the present application may be a "target cell" or a "switching target cell".

[0068] It should be noted that the first cell refers to a cell to be measured, and the number of cells to be measured may be one or more. The third cell refers to a target cell for cell switching or a switching target cell, which is a designated cell and may be one of the cells to be measured.

[0069] It should be noted that the "indication" and "configuration" described in the embodiments of the present application can be interchangeable. For example, the "first signaling is used to indicate that a first operation is performed on a first cell" described in the embodiments of the present application can also be "the first signaling is used to configure the first operation to be performed on the first cell".

[0070] Figure 3 This is a schematic diagram of the process of the TA acquisition method provided in the embodiment of the present application. Figure 1 ,like Figure 3 As shown, the TA acquisition method includes the following steps:

[0071] Step 301: A terminal device receives a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization.

[0072] In an embodiment of the present application, a terminal device receives a first signaling sent by a network device. In some implementations, the first signaling is a media access control (MAC) control element (CE). In other implementations, the first signaling is a radio resource control (RRC) signaling.

[0073] In the embodiment of the present application, the first signaling is used to instruct, configure or activate a first operation on the first cell, and the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization. Here, uplink synchronization can be acquisition of uplink timing or acquisition of TA.

[0074] It should be noted that measurement specifically refers to: the terminal device measures or receives the downlink signal of the cell. The downlink signal may be SSB or other types of downlink signals.

[0075] It should be noted that downlink synchronization / uplink synchronization is achieved based on measurement, and downlink synchronization / uplink synchronization can be achieved by measuring the downlink signal of the cell. Specifically, downlink synchronization can be achieved by measuring the downlink signal of the cell (such as SSB), and uplink timing acquisition or TA acquisition can be achieved by measuring the downlink signal of the cell (such as SSB), thereby achieving uplink synchronization.

[0076] It should be noted that the number of the first cells may be one or more. As an example: the number of the first cells is 3, and the first signaling is used to instruct or configure or activate the first operation on cell 1, cell 2, and cell 3.

[0077] As an example: the base station configures one or more first cells, such as one or more candidate cells. The base station instructs or configures or activates the terminal device to perform a first operation on the first cell through a first signaling, wherein the first signaling includes one or more IDs of the first cell (such as candidate cells) or a configuration ID of the first cell (such as a candidate cell configuration), and the cell indicated by the ID is the cell that needs to be measured and / or downlink synchronized and / or uplink synchronized.

[0078] In some implementations, the first signaling includes uplink scheduling information or uplink grant (UL grant) information. The uplink resource transmission indicated by the uplink scheduling information or uplink grant information can be used for the terminal device to send information to the network device, such as the first information below.

[0079] Step 302: The terminal device performs a first operation on the first cell, and obtains the TA of the first cell based on the first operation.

[0080] In an embodiment of the present application, the terminal device performs a first operation on the first cell, and obtains the TA of the first cell based on the first operation, which can be achieved through any of the following schemes.

[0081] Solution 1

[0082] In some implementations, the terminal device determines a first time difference between the first cell and the second cell based on the first operation. Further, the terminal device determines a TA of the first cell based on a TA of the second cell and the first time difference.

[0083] Here, the first time difference between the first cell and the second cell may be a downlink timing time difference between the first cell and the second cell, or may be a downlink receiving timing time difference (RX timing difference) between the first cell and the second cell.

[0084] As an example: the TA of the second cell is TA1, the first time difference is offset, and the TA of the first cell is TA2, then: TA2=TA1+2*offset.

[0085] Solution 2

[0086] In some implementations, the first signaling includes a second time offset corresponding to the first cell. On this basis, the terminal device determines the TA of the first cell based on the TA of the second cell, the first time difference and the second time offset.

[0087] In some implementations, the second time offset corresponding to the first cell includes at least one of the following:

[0088] The uplink TA adjusts the corresponding time offset;

[0089] The time offset corresponding to the downlink timing error;

[0090] The time offset corresponding to the uplink and downlink switching.

[0091] Here, the downlink timing error refers to the downlink timing error between the first cell and the second cell.

[0092] Here, the second time offset may include the adjustment value of the uplink TA (i.e., the time offset corresponding to the uplink TA adjustment) and / or the time offset caused by the downlink timing error (i.e., the time offset corresponding to the downlink timing error) and / or the time offset caused by the uplink-downlink conversion (i.e., the time offset corresponding to the uplink-downlink conversion).

[0093] Here, the second time offset may be used by the terminal device to correct or calculate the TA when performing TA calculation.

[0094] As an example: the TA of the second cell is TA1, the first time difference is offset, the second time offset includes the time offset (Delta) corresponding to the downlink timing error, and the TA of the first cell is TA2, then: TA2=TA1+2*(offset+Delta).

[0095] As an example: the TA of the second cell is TA1, the first time difference is offset, the second time offset includes the time offset (X) corresponding to the uplink and downlink conversion, and the TA of the first cell is TA2, then: TA2=TA1+2*offset-X.

[0096] As an example: the TA of the second cell is TA1, the first time difference is offset, the second time offset includes the time offset (Delta) corresponding to the downlink timing error and the time offset (X) corresponding to the uplink and downlink conversion, and the TA of the first cell is TA2, then: TA2=TA1+2*(offset+Delta)-X.

[0097] In some implementations, the identification / confirmation / determination that "the terminal device can obtain the TA of the first cell" can be implemented by the following scheme:

[0098] Plan A

[0099] Method 1) After receiving the first signaling, the terminal device can obtain the TA of the first cell.

[0100] Here, the first signaling may be an RRC signaling. The network device and / or the terminal device determines / confirms / determines / assumes that after the terminal device receives the first signaling, the terminal device can acquire the TA of the first cell.

[0101] Method 2) After a first time has passed after receiving the first signaling, the terminal device can obtain the TA of the first cell.

[0102] Here, the first signaling may be an RRC signaling. The network device and / or the terminal device determines / confirms / determines / assumes that the terminal device can acquire the TA of the first cell after a first time has passed after the terminal device receives the first signaling.

[0103] Method 3) After a second time has passed since a confirmation message corresponding to the first signaling is sent, the terminal device can obtain the TA of the first cell.

[0104] Here, the first signaling may be MAC CE, and the confirmation message corresponding to the first signaling may be HARQ-ACK information. The network device and / or the terminal device determines / confirms / determines / assumes that the terminal device can obtain the TA of the first cell after a second time has passed after the terminal device sends the confirmation message corresponding to the first signaling.

[0105] Plan B

[0106] In some implementations, after the terminal device acquires the TA of the first cell, the terminal device sends the first information or the second signaling to the network device. The first information or the second signaling is used to indicate that the terminal device acquires the TA of the first cell.

[0107] Here, the first information or the second signaling may instruct the terminal device to acquire the TA of part or all of the first cell.

[0108] As an example: the network device instructs or configures or activates, through the first signaling, a first operation on cell 1, cell 2, and cell 3. The terminal device performs the first operation on cell 1, cell 2, and cell 3, obtains the TA of cell 1 and cell 2, and indicates to the network device through the first information or the second signaling that the terminal device obtains the TA of cell 1 and cell 2.

[0109] As an example: the network device instructs or configures or activates, through the first signaling, a first operation on cell 1, cell 2, and cell 3. The terminal device performs the first operation on cell 1, cell 2, and cell 3, obtains the TA of cell 1, cell 2, and cell 3, and indicates to the network device through the first information or the second signaling that the terminal device obtains the TA of cell 1, cell 2, and cell 3.

[0110] The specific implementation scheme of the above-mentioned first information or second signaling is described below.

[0111] Implementation 1) In some implementations, the first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, wherein the first indication information is used to indicate that the terminal device obtains the TA of the first cell. Here, the first cell may be one or more candidate cells or target cells.

[0112] Here, the first signaling may include information such as the ID of the cell whose TA the terminal device has acquired as of the uplink transmission scheduled by the first signaling. Here, the first signaling may only include the ID of the cell to indicate the cell for which TA acquisition has been completed. Alternatively, the first signaling may also include the ID of the cell and information such as the corresponding TA and / or downlink timing time difference and / or downlink reception timing time difference. The first signaling may also include indication information to indicate that the terminal has acquired the TA of all cells indicated by the first signaling. The first signaling may also include indication information to indicate that the terminal has acquired the TA of one or more cells indicated by the first signaling.

[0113] Further, in some embodiments, the first information is transmitted via a first uplink resource; the first uplink resource is indicated by uplink scheduling information included in the first signaling; or, the first uplink resource is obtained via a scheduling request (Scheduling Request, SR) of a terminal device.

[0114] Here, the uplink scheduling information may also be replaced by uplink grant (UL grant) information.

[0115] Here, after executing the first operation, the terminal device transmits the first information using the first uplink resource scheduled by the first signaling; or, after executing the first operation, the terminal device makes a scheduling request for uplink transmission and transmits the first information using the obtained first uplink resource.

[0116] Implementation scheme 2) In some implementation methods, the second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

[0117] Here, the SR may be configured based on RRC signaling.

[0118] Implementation solution 3) In some implementation methods, the first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

[0119] Here, the reporting information is reported in a periodic reporting, semi-continuous reporting or aperiodic reporting.

[0120] Further, in some implementations, the reporting information is transmitted via a second uplink resource; the second uplink resource is indicated by uplink grant (UL grant) information included in the first signaling.

[0121] Here, the reporting information may be channel state information (CSI) reporting information. The CSI reporting information may include at least one of the following: reference signal receiving power (RSRP), channel quality indication (CQI), CSI-RS resource indication (CRI), SSB index (SSB index), signal to interference plus noise ratio (SINR), and other information. More specifically, it may include at least one of the following: cri-RI-PMI-CQI, cri-RI-i1, cri-RI-i1-CQI, cri-RI-CQI, cri-RSRP, cri-SINR, ssb-Index-RSRP, ssb-Index-SINR, cri-RI-LI-PMI-CQI, cri-RSRP-Index, ssb-Index-RSRP-Index, cri-SINR-Index, ssb-Index-SINR-Index.

[0122] In some embodiments, after the terminal device obtains the TA of the first cell, the method further includes: the terminal device receives a switching command sent by the network device, the switching command being used to instruct the terminal device to switch to a third cell; wherein the switching command includes at least one of the following: an identifier of the third cell, a TA of the third cell.

[0123] In some implementations, the third cell may be a cell other than the first cell.

[0124] In some other implementations, the third cell may be a cell within the range of the first cell, that is, the third cell may be a cell in the first cell (the first cell may be a plurality of cells).

[0125] Here, the third cell refers to a target cell of a cell handover or a handover target cell, which is a designated cell. The third cell may be one of the cells performing the first operation.

[0126] Here, the handover command may be a handover instruction of a third cell or a cell switch instruction.

[0127] In some implementations, if the handover command includes a TA of the third cell, the terminal device uses the TA of the third cell included in the handover command to perform uplink transmission on the third cell; and / or, if the handover command does not include the TA of the third cell, the terminal device uses the calculated TA of the third cell to perform uplink transmission on the third cell. Here, the calculated TA of the third cell may also be a TA obtained based on measurement by the terminal device.

[0128] Figure 4 2 is a flow chart of the TA acquisition method provided in the embodiment of the present application, such as Figure 4 As shown, the TA acquisition method includes the following steps:

[0129] Step 401: The network device sends a first signaling to the terminal device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain a TA of the first cell.

[0130] In an embodiment of the present application, the network device sends a first signaling to the terminal device. In some implementations, the first signaling is a MAC CE. In other implementations, the first signaling is an RRC signaling.

[0131] In the embodiment of the present application, the first signaling is used to instruct, configure or activate a first operation on the first cell, and the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization. Here, uplink synchronization can be acquisition of uplink timing or acquisition of TA.

[0132] It should be noted that measurement specifically refers to: the terminal device measures or receives the downlink signal of the cell. The downlink signal may be SSB or other types of downlink signals.

[0133] It should be noted that downlink synchronization / uplink synchronization is achieved based on measurement, and downlink synchronization / uplink synchronization can be achieved by measuring the downlink signal of the cell. Specifically, downlink synchronization can be achieved by measuring the downlink signal of the cell (such as SSB), and uplink timing acquisition or TA acquisition can be achieved by measuring the downlink signal of the cell (such as SSB), thereby achieving uplink synchronization.

[0134] It should be noted that the number of the first cells may be one or more. As an example: the number of the first cells is 3, and the first signaling is used to instruct or configure or activate the first operation on cell 1, cell 2, and cell 3.

[0135] In some implementations, the first signaling includes a second time offset corresponding to the first cell. The second time offset is used by the terminal device to obtain the TA of the first cell. The specific acquisition method can refer to the aforementioned Figure 3 Related programs.

[0136] In some implementations, the second time offset corresponding to the first cell includes at least one of the following:

[0137] The uplink TA adjusts the corresponding time offset;

[0138] The time offset corresponding to the downlink timing error;

[0139] The time offset corresponding to the uplink and downlink switching.

[0140] Here, the second time offset may include the adjustment value of the uplink TA (i.e., the time offset corresponding to the uplink TA adjustment) and / or the time offset caused by the downlink timing error (i.e., the time offset corresponding to the downlink timing error) and / or the time offset caused by the uplink-downlink conversion (i.e., the time offset corresponding to the uplink-downlink conversion).

[0141] Here, the downlink timing error refers to the downlink timing error between the first cell and the second cell.

[0142] In some implementations, the identification / confirmation / determination that "the terminal device can obtain the TA of the first cell" can be implemented by the following scheme:

[0143] Plan A

[0144] Method 1) After sending the first signaling, the terminal device can obtain the TA of the first cell.

[0145] Here, the first signaling may be an RRC signaling. The network device determines / confirms / determines / assumes that after the network device sends the first signaling, the terminal device can obtain the TA of the first cell.

[0146] Method 2) After a first time has passed since the first signaling was sent, the terminal device can obtain the TA of the first cell.

[0147] Here, the first signaling may be an RRC signaling. The network device determines / confirms / determines / assumes that the terminal device can acquire the TA of the first cell after a first time has passed after the network device sends the first signaling.

[0148] Method 3) After a second time has passed since receiving the confirmation message corresponding to the first signaling, the terminal device can obtain the TA of the first cell.

[0149] Here, the first signaling may be MAC CE, and the confirmation message corresponding to the first signaling may be HARQ-ACK information. The network device determines / confirms / determines / assumes that the terminal device can obtain the TA of the first cell after a second time has passed after the network device receives the confirmation message corresponding to the first signaling.

[0150] For the above-mentioned solution A, the terminal device does not need to provide feedback to the network device, and the network device believes that the terminal device can calculate or obtain the TA of the first cell through the first operation. Alternatively, the network device believes that the error of the terminal device for the TA of the first cell can be adjusted in subsequent uplink transmissions, or the error does not affect the uplink transmission quality. After the network device confirms that the terminal device can obtain the TA of the first cell, it can send a switching instruction to the terminal device.

[0151] Plan B

[0152] In some implementations, the network device receives the first information or the second signaling sent by the terminal device. The first information or the second signaling is used to instruct the terminal device to acquire the TA of the first cell.

[0153] Here, the first information or the second signaling may instruct the terminal device to acquire the TA of part or all of the first cell.

[0154] As an example: the network device instructs or configures or activates, through the first signaling, a first operation on cell 1, cell 2, and cell 3. The terminal device performs the first operation on cell 1, cell 2, and cell 4, obtains the TA of cell 1 and cell 2, and indicates to the network device through the first information or the second signaling that the terminal device obtains the TA of cell 1 and cell 2.

[0155] As an example: the network device instructs or configures or activates, through the first signaling, a first operation on cell 1, cell 2, and cell 3. The terminal device performs the first operation on cell 1, cell 2, and cell 4, obtains the TA of cell 1, cell 2, and cell 3, and indicates to the network device through the first information or the second signaling that the terminal device obtains the TA of cell 1, cell 2, and cell 3.

[0156] The specific implementation scheme of the above-mentioned first information or second signaling is described below.

[0157] Implementation 1) In some implementations, the first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, wherein the first indication information is used to indicate that the terminal device obtains the TA of the first cell. Here, the first cell may be one or more candidate cells or target cells.

[0158] Further, in some embodiments, the first information is transmitted via a first uplink resource; the first uplink resource is indicated by uplink scheduling information included in the first signaling; or, the first uplink resource is obtained via an SR of the terminal device.

[0159] Here, the uplink scheduling information may also be replaced by uplink grant (UL grant) information.

[0160] Implementation scheme 2) In some implementation methods, the second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

[0161] Implementation solution 3) In some implementation methods, the first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

[0162] Here, the reporting information is reported in a periodic reporting, semi-continuous reporting or aperiodic reporting.

[0163] Further, in some implementations, the reporting information is transmitted via a second uplink resource; the second uplink resource is indicated by uplink grant (UL grant) information included in the first signaling.

[0164] Here, the reporting information may be CSI reporting information. The CSI reporting information may include at least one of the following: RSRP, CQI, CRI, SSB index, SINR and other information. More specifically, it may include at least one of the following: cri-RI-PMI-CQI, cri-RI-i1, cri-RI-i1-CQI, cri-RI-CQI, cri-RSRP, cri-SINR, ssb-Index-RSRP, ssb-Index-SINR, cri-RI-LI-PMI-CQI, cri-RSRP-Index, ssb-Index-RSRP-Index, cri-SINR-Index, ssb-Index-SINR-Index.

[0165] In some embodiments, after the network device identifies / confirms / determines / believes through the above-mentioned Scheme A or Scheme B that the terminal device obtains the TA of the first cell, the method further includes: the network device sends a switching command to the terminal device, and the switching command is used to instruct the terminal device to switch to the third cell; wherein the switching command includes at least one of the following: an identifier of the third cell, and a TA of the third cell.

[0166] Here, the third cell refers to a target cell of a cell handover or a handover target cell, which is a designated cell. The third cell may be one of the cells performing the first operation.

[0167] Here, the handover command may be a handover instruction of a third cell or a cell switch instruction.

[0168] Figure 5 This is a schematic diagram of the process of the TA acquisition method provided in the embodiment of the present application. Figure 3, the base station refers to the base station corresponding to the serving cell, the terminal device is the UE, the first cell includes the candidate cell #1 and the candidate cell #2 (that is, the number of the first cells is 2), the second cell is the serving cell, and the third cell is the candidate cell #1. Figure 5 As shown, the TA acquisition method includes the following steps:

[0169] Step 501: A base station sends a first signaling to a UE, where the first signaling is used to instruct, configure or activate measurement and / or downlink synchronization and / or uplink synchronization of candidate cell #1 and candidate cell #2.

[0170] Step 502: Candidate cell #1 sends a downlink signal, and candidate cell #2 sends a downlink signal. The downlink signal may be SSB or other types of signals.

[0171] Step 503: The UE measures the downlink signal of candidate cell #1 and the downlink signal of candidate cell #2.

[0172] Step 504: The UE calculates the TA of candidate cell #1 based on the reception time difference of the downlink signal between candidate cell #1 and the serving cell (i.e., the downlink reception timing time difference), the TA of the serving cell, and the second time offset (optional). The UE calculates the TA of candidate cell #2 based on the reception time difference of the downlink signal between candidate cell #2 and the serving cell (i.e., the downlink reception timing time difference), the TA of the serving cell, and the second time offset (optional).

[0173] Step 505: The UE sends the first information or the second signaling to the base station, where the first information or the second signaling is used to instruct the terminal device to obtain the TAs of the candidate cell #1 and the candidate cell #2.

[0174] Here, the specific implementation of the first information or the second signaling can refer to the aforementioned Figure 3 and Figure 4 Related programs.

[0175] Step 506: The base station sends a handover command to the UE.

[0176] Here, the handover command may be a handover command to the candidate cell #1 (ie, the target cell) or a cell handover command.

[0177] Here, the handover command may include the ID and TA of the candidate cell #1. In this case, the UE uses the TA included in the handover command to perform uplink transmission to the candidate cell #1.

[0178] Here, the handover command may only include the ID of the candidate cell #1. In this case, the UE uses the calculated TA of the candidate cell #1 (or the measured TA of the candidate cell #1) to perform uplink transmission to the candidate cell #1.

[0179] The following uses a specific application example to illustrate how to calculate the TA of a cell. In the following application example, the UE calculates the TA of a cell based on the downlink reception timing time difference. However, the present invention is not limited to this. The UE can also calculate the TA of a cell based on the downlink timing time difference. Figure 6 As shown, cell 1 and cell 2 may be transmission node 1 (or base station 1) and transmission node 2 (or base station 2), cell 1 sends a downlink signal (such as SSB#1) to the UE, and cell 2 sends a downlink signal (such as SSB#2) to the UE.

[0180] Application Example 1

[0181] Reference Figure 7-1 , Figure 7-1 The schematic diagram for calculating TA2 is shown as follows:

[0182] 1) Determination of TA

[0183] In the case of a single cell, TA is twice the propagation delay, so the TA of cell 1 and cell 2 satisfies the following formula:

[0184] TA1=2*TP1

[0185] TA2=2*TP2

[0186] Among them, TA1 is the TA of cell 1, and TA2 is the TA of cell 2.

[0187] 2) Determination of downlink reception timing difference

[0188] Offset is the downlink reception timing time difference, that is, the time difference between the UE receiving the downlink signal of downlink node 1 and node 2. Offset satisfies the following formula:

[0189] Offset=TP2-TP1

[0190] 3) The UE can calculate the TA2 of cell 2 based on TA1 and offset. TA2 satisfies the following formula:

[0191] TA2=TA1+2*offset

[0192] Application Example 2

[0193] Reference Figure 7-2 , Figure 7-2 The schematic diagram for calculating TA2 is shown as follows:

[0194] 1) Determination of TA

[0195] In the case of a single cell, TA is twice the propagation delay, so the TA of cell 1 and cell 2 satisfies the following formula:

[0196] TA1=2*TP1

[0197] TA2=2*TP2

[0198] Among them, TA1 is the TA of cell 1, and TA2 is the TA of cell 2.

[0199] 2) Determination of downlink reception timing difference

[0200] There is an error in the downlink timing between cells, and the error is delta (i.e., the downlink timing error). In this case, the downlink receiving timing time difference Offset satisfies the following formula:

[0201] offset=TP2-TP1+Delta

[0202] Delta can be obtained through interaction between cells or through information reported by other terminals.

[0203] 3) The UE can calculate the TA2 of cell 2 based on TA1 and offset. TA2 satisfies the following formula:

[0204] TA2=TA1+2*(offset+Delta)

[0205] Application Example 3

[0206] Reference Figure 7-3 , Figure 7-3 The schematic diagram for calculating TA2 is shown as follows:

[0207] 1) Determination of TA

[0208] In the case of a single cell, TA is twice the propagation delay, so the TA of cell 1 and cell 2 satisfies the following formula:

[0209] TA1=2*TP1

[0210] TA2=2*TP2

[0211] Among them, TA1 is the TA of cell 1, and TA2 is the TA of cell 2.

[0212] 2) Determination of downlink reception timing difference

[0213] There is an error in the downlink timing between cells, and the error is delta (i.e., the downlink timing error). In this case, the downlink receiving timing time difference Offset satisfies the following formula:

[0214] offset=TP2-TP1+Delta

[0215] Here, Delta can be obtained through interaction between cells or through information reported by other terminals.

[0216] 3) Determination of TA2 for Cell 2

[0217] There is a transition time (gap) X between downlink transmission and uplink transmission of cell 2. In this case, the UE can calculate TA2 of cell 2 according to TA1, offset and X. TA2 satisfies the following formula:

[0218] TA2=TA1+2*(offset+Delta)-X

[0219] Here, the uplink-downlink switching time is an implementation parameter of the base station, and can be further indicated by the base station to inform the UE.

[0220] The technical solution of the embodiment of the present application is as follows: 1) the uplink TA is estimated based on the downlink measurement of the UE, which can avoid the delay caused by the scheduling and TA indication introduced by the RACH of the PDCCH order. The UE can calculate the TA of the target cell based on its own measurement and the existing TA information of the current serving cell, which can reduce the delay and improve the flexibility of the UE. 2) The downlink measurement indication is reused to reduce the cell range for the UE to perform downlink synchronization and TA calculation. At the same time, the feature of multiplexing the indication to indicate downlink measurement or synchronization can better serve the reception time difference based on multiple candidate cells in this solution, reducing the amount of indication and UE calculation. 3) Introducing the indication based on the TA in the cell switch or the indication information of the candidate cell to indicate the uplink TA that the UE needs to use, so as to ensure that the UE has a more accurate TA or timing information, and to inform the UE which calculated TA value to use for uplink transmission by reducing the overhead.

[0221] Figure 8 This is a schematic diagram of the structure of the TA acquisition device provided in the embodiment of the present application. Figure 1 , applied to terminal devices, such as Figure 8 As shown, the TA acquisition device includes:

[0222] A receiving unit 801 is configured to receive a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization;

[0223] The determining unit 802 is configured to perform a first operation on the first cell, and obtain a TA of the first cell based on the first operation.

[0224] In some implementations, the determining unit 802 is configured to determine a first time difference between the first cell and the second cell based on the first operation, and determine a TA of the first cell based on a TA of the second cell and the first time difference.

[0225] In some implementations, the first signaling includes a second time offset corresponding to the first cell.

[0226] In some implementations, the determining unit 802 is configured to determine the TA of the first cell based on the TA of the second cell, the first time difference, and the second time offset.

[0227] In some embodiments, the second time offset includes at least one of the following:

[0228] The uplink TA adjusts the corresponding time offset;

[0229] The time offset corresponding to the downlink timing error;

[0230] The time offset corresponding to the uplink and downlink switching.

[0231] In some embodiments, after receiving the first signaling, the terminal device can obtain the TA of the first cell; and / or, after a first time has passed after receiving the first signaling, the terminal device can obtain the TA of the first cell; and / or, after a second time has passed after sending a confirmation message corresponding to the first signaling, the terminal device can obtain the TA of the first cell.

[0232] In some implementations, the apparatus further includes: a sending unit 803, configured to send the first information or the second signaling to the network device.

[0233] In some implementations, the first information or the second signaling is used to instruct the terminal device to acquire the TA of the first cell.

[0234] In some embodiments, the first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, wherein the first indication information is used to indicate that the terminal device obtains the TA of the first cell.

[0235] In some implementations, the first information is transmitted via a first uplink resource;

[0236] The first uplink resource is indicated by uplink scheduling information included in the first signaling; or,

[0237] The first uplink resource is obtained through the SR of the terminal device.

[0238] In some implementations, the second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

[0239] In some implementations, the first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

[0240] In some implementations, the reporting information is reported in a periodic reporting manner, a semi-continuous reporting manner, or a non-periodic reporting manner.

[0241] In some implementations, the reporting information is transmitted via a second uplink resource;

[0242] The second uplink resource is indicated by uplink grant information included in the first signaling.

[0243] In some embodiments, the receiving unit 801 is used to receive a switching command sent by the network device, and the switching command is used to instruct the terminal device to switch to a third cell; wherein the switching command includes at least one of the following: an identifier of the third cell and a TA of the third cell.

[0244] In some embodiments, if the switching command includes the TA of the third cell, the sending unit 803 uses the TA of the third cell included in the switching command to perform uplink transmission to the third cell; and / or, if the switching command does not include the TA of the third cell, the sending unit 803 uses the calculated TA of the third cell to perform uplink transmission to the third cell.

[0245] In some implementations, the first signaling is MAC CE or RRC signaling.

[0246] Those skilled in the art should understand that Figure 8 The implementation functions of each unit in the TA acquisition device shown can be understood by referring to the relevant description of the aforementioned method. Figure 8 The functions of each unit in the TA acquisition device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0247] Fig. 9 Schematic diagram 2 of the structure of the TA acquisition device provided in the embodiment of the present application, which is applied to network equipment, such as Fig. 9 As shown, the TA acquisition device includes:

[0248] The sending unit 901 is used to send a first signaling to the terminal device, where the first signaling is used to indicate, configure or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain the TA of the first cell.

[0249] In some implementations, the first signaling includes a second time offset corresponding to the first cell.

[0250] In some embodiments, the second time offset includes at least one of the following:

[0251] The uplink TA adjusts the corresponding time offset;

[0252] The time offset corresponding to the downlink timing error;

[0253] The time offset corresponding to the uplink and downlink switching.

[0254] In some implementations, after sending the first signaling, the terminal device can acquire the TA of the first cell; and / or,

[0255] After a first time has passed since the first signaling was sent, the terminal device is able to acquire the TA of the first cell; and / or,

[0256] After a second time has passed since receiving the confirmation message corresponding to the first signaling, the terminal device can obtain the TA of the first cell.

[0257] In some implementations, the apparatus further includes: a receiving unit 902, configured to receive the first information or the second signaling sent by the terminal device.

[0258] In some implementations, the first information or the second signaling is used to instruct the terminal device to acquire the TA of the first cell.

[0259] In some embodiments, the first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, wherein the first indication information is used to indicate that the terminal device obtains the TA of the first cell.

[0260] In some implementations, the first information is transmitted via a first uplink resource;

[0261] The first uplink resource is indicated by uplink scheduling information included in the first signaling; or,

[0262] The first uplink resource is obtained through the SR of the terminal device.

[0263] In some implementations, the second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

[0264] In some implementations, the first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

[0265] In some implementations, the reporting information is reported in a periodic reporting manner, a semi-continuous reporting manner, or a non-periodic reporting manner.

[0266] In some implementations, the reporting information is transmitted via a second uplink resource;

[0267] The second uplink resource is indicated by uplink grant information included in the first signaling.

[0268] In some embodiments, the sending unit 901 is used to send a switching command to the terminal device, and the switching command is used to instruct the terminal device to switch to a third cell; wherein the switching command includes at least one of the following: an identifier of the third cell and a TA of the third cell.

[0269] In some implementations, the first signaling is MAC CE or RRC signaling.

[0270] Those skilled in the art should understand that Fig. 9 The implementation functions of each unit in the TA acquisition device shown can be understood by referring to the relevant description of the aforementioned method. Fig. 9 The functions of each unit in the TA acquisition device shown can be implemented by a program running on a processor, or by a specific logic circuit.

[0271] Fig.10 1 is a schematic structural diagram of a communication device 1000 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. Fig.10 The communication device 1000 shown includes a processor 1010, and the processor 1010 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0272] Alternatively, if Fig.10 As shown, the communication device 1000 may further include a memory 1020. The processor 1010 may call and run a computer program from the memory 1020 to implement the method in the embodiment of the present application.

[0273] The memory 1020 may be a separate device independent of the processor 1010 , or may be integrated into the processor 1010 .

[0274] Alternatively, if Fig.10 As shown, the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0275] The transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include an antenna, and the number of antennas may be one or more.

[0276] Optionally, the communication device 1000 may specifically be a network device of an embodiment of the present application, and the communication device 1000 may implement corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0277] Optionally, the communication device 1000 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0278] Fig.11 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.11 The chip 1100 shown includes a processor 1110, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0279] Alternatively, if Fig.11 As shown, the chip 1100 may further include a memory 1120. The processor 1110 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0280] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0281] Optionally, the chip 1100 may further include an input interface 1130. The processor 1110 may control the input interface 1130 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0282] Optionally, the chip 1100 may further include an output interface 1140. The processor 1110 may control the output interface 1140 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0283] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0284] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0285] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0286] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0287] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0288] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0289] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0290] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0291] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0292] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0293] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0294] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0295] The embodiment of the present application also provides a computer program.

[0296] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0297] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0298] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0299] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0300] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0301] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0302] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0303] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0304] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for acquiring a timing advance TA, characterized in that: The method comprises: The terminal device receives a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; The terminal device performs a first operation on the first cell, and obtains the TA of the first cell based on the first operation.

2. The method according to claim 1, characterized in that The method further comprises: A first time difference between the first cell and the second cell is determined based on the first operation.

3. The method according to claim 2, characterized in that The acquiring the TA of the first cell based on the first operation includes: The TA of the first cell is determined based on the TA of the second cell and the first time difference.

4. The method according to claim 1, characterized in that: The first signaling includes a second time offset corresponding to the first cell.

5. The method according to claim 2, characterized in that: The determining the TA of the first cell based on the first operation includes: The TA of the first cell is determined based on the TA of the second cell, the first time difference, and the second time offset.

6. The method according to claim 4, characterized in that The second time offset includes at least one of the following: The uplink TA adjusts the corresponding time offset; The time offset corresponding to the downlink timing error; The time offset corresponding to the uplink and downlink switching.

7. The method according to claim 1, characterized in that After receiving the first signaling, the terminal device can acquire the TA of the first cell; and / or, After a first time has passed after receiving the first signaling, the terminal device is able to acquire the TA of the first cell; and / or, After a second time has passed since a confirmation message corresponding to the first signaling was sent, the terminal device can obtain the TA of the first cell.

8. The method according to claim 1, characterized in that The method further comprises: The terminal device sends the first information or the second signaling to the network device.

9. The method according to claim 8, characterized in that The first information or the second signaling is used to instruct the terminal device to obtain the TA of the first cell.

10. The method according to claim 8, characterized in that The first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, where the first indication information is used to instruct the terminal device to obtain the TA of the first cell.

11. The method according to claim 10, characterized in that The first information is transmitted via a first uplink resource; The first uplink resource is indicated by uplink scheduling information included in the first signaling; or, The first uplink resource is obtained through a scheduling request SR of the terminal device.

12. The method according to claim 8, characterized in that The second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

13. The method according to claim 8, characterized in that The first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

14. The method according to claim 13, characterized in that The reporting information is reported in a periodic reporting, semi-continuous reporting or non-periodic reporting manner.

15. The method according to claim 13, characterized in that The reporting information is transmitted via a second uplink resource; The second uplink resource is indicated by uplink grant information included in the first signaling.

16. The method according to any one of claims 1 to 15, characterized in that The method further comprises: The terminal device receives a switching command sent by the network device, where the switching command is used to instruct the terminal device to switch to a third cell; wherein the switching command includes at least one of the following: an identifier of the third cell, and a TA of the third cell.

17. The method according to claim 16, characterized in that The method further comprises: If the switching command includes the TA of the third cell, the terminal device uses the TA of the third cell included in the switching command to perform uplink transmission to the third cell; and / or, If the switching command does not include the TA of the third cell, the terminal device uses the calculated TA of the third cell to perform uplink transmission to the third cell.

18. The method according to any one of claims 1 to 15, characterized in that The first signaling is MAC CE or RRC signaling.

19. A TA acquisition method, characterized in that: The method comprises: The network device sends a first signaling to the terminal device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain the TA of the first cell.

20. The method according to claim 19, characterized in that The first signaling includes a second time offset corresponding to the first cell.

21. The method according to claim 20, characterized in that The second time offset includes at least one of the following: The uplink TA adjusts the corresponding time offset; The time offset corresponding to the downlink timing error; The time offset corresponding to the uplink and downlink switching.

22. The method according to claim 19, characterized in that The method further comprises: After sending the first signaling, the terminal device can acquire the TA of the first cell; and / or, After a first time has passed since the first signaling was sent, the terminal device is able to acquire the TA of the first cell; and / or, After a second time has passed since receiving the confirmation message corresponding to the first signaling, the terminal device can obtain the TA of the first cell.

23. The method according to claim 19, characterized in that The method further comprises: The network device receives the first information or the second signaling sent by the terminal device.

24. The method according to claim 23, characterized in that The first information or the second signaling is used to instruct the terminal device to obtain the TA of the first cell.

25. The method according to claim 23, characterized in that The first information includes at least one of the following: a first time difference between the first cell and the second cell, a TA of the first cell, an identifier of the first cell, and first indication information, where the first indication information is used to instruct the terminal device to obtain the TA of the first cell.

26. The method according to claim 25, characterized in that The first information is transmitted via a first uplink resource; The first uplink resource is indicated by uplink scheduling information included in the first signaling; or, The first uplink resource is obtained through the SR of the terminal device.

27. The method according to claim 23, characterized in that The second signaling is a specific SR, and the specific SR is used to instruct the terminal device to obtain the TA of the first cell.

28. The method according to claim 23, characterized in that The first information is reporting information of the first cell, and the reporting information of the first cell is used to indicate that the terminal device obtains the TA of the first cell.

29. The method according to claim 28, characterized in that The reporting information is reported in a periodic reporting, semi-continuous reporting or non-periodic reporting manner.

30. The method according to claim 28, characterized in that The reporting information is transmitted via a second uplink resource; The second uplink resource is indicated by uplink grant information included in the first signaling.

31. The method according to any one of claims 19 to 30, characterized in that The method further comprises: The network device sends a switching command to the terminal device, where the switching command is used to instruct the terminal device to switch to a third cell; wherein the switching command includes at least one of the following: an identifier of the third cell, and a TA of the third cell.

32. The method according to any one of claims 19 to 30, characterized in that The first signaling is MAC CE or RRC signaling.

33. A TA acquisition device, characterized in that: Applied to a terminal device, the device comprises: A receiving unit, configured to receive a first signaling sent by a network device, where the first signaling is used to instruct, configure, or activate a first operation on a first cell, where the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; The determining unit is configured to perform a first operation on the first cell, and obtain a TA of the first cell based on the first operation.

34. A TA acquisition device, characterized in that: Applied to network equipment, the device comprises: A sending unit is used to send a first signaling to a terminal device, wherein the first signaling is used to indicate, configure or activate a first operation on a first cell, wherein the first operation includes at least one of the following: measurement, downlink synchronization, and uplink synchronization; wherein the first operation is used to obtain a TA of the first cell.

35. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 18.

36. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 19 to 32.

37. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 32.

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