Timing advance obtaining method and device and storage medium

Abstract

The embodiment of the invention provides a timing advance obtaining method and device and a storage medium, and relates to the technical field of communication, terminals and the like. The method comprises: according to condition configuration information, initiating a random access process to at least one first cell to obtain a TA of the at least one first cell, the at least one first cell comprising a serving cell and / or a non-serving cell. In this way, the terminal device can acquire TA of the first cell as much as possible in advance, the probability of executing RACH-less is increased, and the access delay of the terminal device is reduced.

Description

Technical Field

[0001] The present application relates to technical fields such as communications and terminals, and in particular to a method, device, and storage medium for obtaining a timing advance. Background Art

[0002] Currently, Layer 1 / L2-triggered mobility (LTM) has been introduced in New Radio (NR).

[0003] For conditional LTM, the terminal device needs to first obtain the timing advance (TA) of as many candidate cells as possible, then measure the relevant conditions on its own, and after determining that the relevant conditions are met, perform random access channel-less (RACH-less) switching based on the obtained TA.

[0004] Therefore, how the terminal device can obtain the TAs of as many cells as possible in advance to reduce the access delay of the terminal device has become a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The embodiments of the present application provide a method, device, and storage medium for obtaining a timing advance, which are applied to technical fields such as communications and terminals, and are used for a terminal device to obtain the TA of as many first cells as possible in advance in a conditional LTM, thereby increasing the probability of executing RACH-less and reducing the access delay of the terminal device.

[0006] In a first aspect, an embodiment of the present application provides a method for obtaining a timing advance, which is applied to a terminal device. The method includes:

[0007] According to the condition configuration information, a random access procedure is initiated to at least one first cell to obtain a timing advance TA of the at least one first cell, where the at least one first cell includes a serving cell and / or a non-serving cell.

[0008] In an embodiment of the present application, the terminal device initiates a random access process to at least one first cell according to the conditional configuration information to obtain the TA of the at least one first cell, so that the terminal device can obtain the TA of as many first cells as possible in advance in the conditional LTM, increase the probability of the terminal device executing RACH-less, and reduce the access delay of the terminal device.

[0009] In an optional embodiment of the first aspect, the conditional configuration information includes one or more of the following:

[0010] First cell signal correlation threshold;

[0011] Serving cell signal related threshold;

[0012] The duration of the first timing advance timer TAT;

[0013] a duration of at least one second TAT, the at least one second TAT corresponding to the at least one first cell;

[0014] an identifier of at least one group;

[0015] The identifier of the first CU;

[0016] The identifier of the first DU.

[0017] In an optional embodiment of the first aspect, initiating a random access procedure to at least one first cell according to the conditional configuration information includes:

[0018] When a first condition is met, initiating a random access procedure to at least one first cell;

[0019] The first condition includes one or more of the following:

[0020] The signal quality of the at least one first cell is greater than and / or equal to the first cell signal correlation threshold;

[0021] The signal quality of the serving cell is less than and / or equal to the serving cell signal-related threshold, or the signal quality is lower than the serving cell signal-related threshold;

[0022] The signal quality of the first cell is better than the signal quality of the serving cell by a first threshold;

[0023] The first TAT times out;

[0024] the at least one second TAT times out;

[0025] There exists a cell under the first CU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0026] There exists a cell under the first DU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0027] The terminal device accesses a second cell, and the CU to which the second cell belongs is the first CU;

[0028] The terminal device accesses a third cell, and the DU to which the third cell belongs is the first DU.

[0029] In an optional embodiment of the first aspect, the at least one first cell is any one of the following:

[0030] The cell under the first CU;

[0031] The cell under the first DU.

[0032] In an optional embodiment of the first aspect, initiating a random access procedure to at least one first cell to obtain a TA of the at least one first cell includes:

[0033] Send a random access preamble code to the at least one first cell according to the random access related configuration information to obtain the TA of the at least one first cell.

[0034] In an optional embodiment of the first aspect, the random access-related configuration information includes one or more of the following:

[0035] a random access preamble code corresponding to the at least one first cell;

[0036] a random access preamble corresponding to at least one group, wherein the at least one group includes the at least one first cell;

[0037] a random access preamble corresponding to each cell in the at least one group;

[0038] frequency information corresponding to at least one first cell;

[0039] a first random access channel (RACH)-related configuration of at least one first cell, where the first RACH-related configuration of the at least one first cell is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0040] a first period of at least one first cell;

[0041] a first time window of at least one first cell;

[0042] First TAT related information.

[0043] In an optional embodiment of the first aspect, the first period of the first cell is:

[0044] The duration of sending the random access preamble to the first cell at least once; or

[0045] After sending the random access preamble to the first cell, the duration of not sending the random access preamble to the first cell; or,

[0046] The reset duration of the synchronization period timer is used to send a random access preamble code to the first cell once when the synchronization period timer times out.

[0047] In an optional embodiment of the first aspect, the first time window of the first cell is a time period occupied by sending a random access preamble code to the first cell, or a time period occupied by sending a random access preamble code to the at least one first cell.

[0048] In an optional embodiment of the first aspect, the random access-related configuration information includes one or more of the following:

[0049] at least one random access preamble;

[0050] A second RACH-related configuration is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0051] Second cycle;

[0052] Second time window;

[0053] Second TAT related information.

[0054] In an optional embodiment of the first aspect, the second period is:

[0055] a duration occupied by sending a random access preamble code at least once to the at least one first cell; or

[0056] After sending the random access preamble to the at least one first cell, the duration of not sending the random access preamble to the at least one first cell; or,

[0057] The reset duration of the synchronization period timer is used to send a random access preamble code to the at least one first cell once when the synchronization period timer times out.

[0058] In an optional embodiment of the first aspect, the second time window is a time period occupied by sending a random access preamble code to the at least one first cell.

[0059] In an optional embodiment of the first aspect, acquiring the TA of the at least one first cell includes:

[0060] At least one reply message is received, where the at least one reply message includes the TA of the at least one first cell.

[0061] In an optional embodiment of the first aspect, the at least one reply message further includes a TAT corresponding to the at least one first cell.

[0062] In a second aspect, an embodiment of the present application provides a method for obtaining a timing advance, which is applied to a network-side device. The method includes:

[0063] Send conditional configuration information to the terminal device.

[0064] In an optional embodiment of the second aspect, the method further includes:

[0065] Send random access related configuration information to the terminal device.

[0066] In a third aspect, an embodiment of the present application provides a terminal device, including:

[0067] The sending module is configured to initiate a random access process to at least one first cell according to the conditional configuration information to obtain a timing advance TA of the at least one first cell, where the at least one first cell includes a serving cell and / or a non-serving cell.

[0068] In an optional embodiment of the third aspect, the conditional configuration information includes one or more of the following:

[0069] First cell signal correlation threshold;

[0070] Serving cell signal related threshold;

[0071] The duration of the first timing advance timer TAT;

[0072] a duration of at least one second TAT, the at least one second TAT corresponding to the at least one first cell;

[0073] an identifier of at least one group;

[0074] The identifier of the first CU;

[0075] The identifier of the first DU.

[0076] In an optional embodiment of the third aspect, the sending module is specifically configured to: initiate a random access procedure to at least one first cell when a first condition is met;

[0077] The first condition includes one or more of the following:

[0078] The signal quality of the at least one first cell is greater than and / or equal to the first cell signal correlation threshold;

[0079] The signal quality of the serving cell is less than and / or equal to the serving cell signal-related threshold, or the signal quality is lower than the serving cell signal-related threshold;

[0080] The signal quality of the first cell is better than the signal quality of the serving cell by a first threshold;

[0081] The first TAT times out;

[0082] the at least one second TAT times out;

[0083] There exists a cell under the first CU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0084] There exists a cell under the first DU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0085] The terminal device accesses the second cell, and the CU to which the second cell belongs is the first CU.

[0086] The terminal device accesses a third cell, and the DU to which the third cell belongs is the first DU.

[0087] In an optional embodiment of the third aspect, the at least one first cell is any one of the following:

[0088] The cell under the first CU;

[0089] The cell under the first DU.

[0090] In an optional embodiment of the third aspect, the sending module is specifically configured to:

[0091] Send a random access preamble code to the at least one first cell according to the random access related configuration information to obtain the TA of the at least one first cell.

[0092] In an optional embodiment of the third aspect, the random access-related configuration information includes one or more of the following:

[0093] a random access preamble code corresponding to the at least one first cell;

[0094] a random access preamble corresponding to at least one group, wherein the at least one group includes the at least one first cell;

[0095] a random access preamble corresponding to each cell in the at least one group;

[0096] frequency information corresponding to at least one first cell;

[0097] a first random access channel (RACH)-related configuration of at least one first cell, where the first RACH-related configuration of the at least one first cell is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0098] a first period of at least one first cell;

[0099] a first time window of at least one first cell;

[0100] First TAT related information.

[0101] In an optional embodiment of the third aspect, the first period of the first cell is:

[0102] The duration of sending the random access preamble to the first cell at least once; or

[0103] After sending the random access preamble to the first cell, the duration of not sending the random access preamble to the first cell; or,

[0104] The reset duration of the synchronization period timer is used to send a random access preamble code to the first cell once when the synchronization period timer times out.

[0105] In an optional embodiment of the third aspect, the first time window of the first cell is a time period occupied by sending a random access preamble code to the first cell, or a time period occupied by sending a random access preamble code to the at least one first cell.

[0106] In an optional embodiment of the third aspect, the random access-related configuration information includes one or more of the following:

[0107] at least one random access preamble;

[0108] A second RACH-related configuration is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0109] Second cycle;

[0110] Second time window;

[0111] Second TAT related information.

[0112] In an optional embodiment of the third aspect, the second period is:

[0113] a duration occupied by sending a random access preamble code at least once to the at least one first cell; or

[0114] After sending the random access preamble to the at least one first cell, the duration of not sending the random access preamble to the at least one first cell; or,

[0115] The reset duration of the synchronization period timer is used to send a random access preamble code to the at least one first cell once when the synchronization period timer times out.

[0116] In an optional embodiment of the third aspect, the second time window is a time period occupied by sending a random access preamble code to the at least one first cell.

[0117] In an optional embodiment of the third aspect, the terminal device 40 further includes:

[0118] The receiving module is configured to receive at least one reply message, where the at least one reply message includes the TA of the at least one first cell.

[0119] In an optional embodiment of the third aspect, the at least one reply message further includes a TAT corresponding to the at least one first cell.

[0120] In a fourth aspect, an embodiment of the present application provides a network-side device, including:

[0121] The sending module is used to send conditional configuration information to the terminal device.

[0122] In an optional embodiment of the fourth aspect, the sending module is further configured to:

[0123] Send random access related configuration information to the terminal device.

[0124] In the fifth aspect, an embodiment of the present application provides a terminal device, comprising: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the method described in the first aspect or any optional embodiment of the first aspect.

[0125] In the sixth aspect, an embodiment of the present application provides a network side device, comprising: a processor and a memory; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the network side device performs the method described in the second aspect or any optional embodiment of the second aspect.

[0126] In a seventh aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method described in the first aspect or any optional embodiment of the first aspect, or the method described in the second aspect or any optional embodiment of the second aspect, is implemented.

[0127] In an eighth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is run, it enables the computer to execute the method described in the first aspect or any optional embodiment of the first aspect, or the method described in the second aspect or any optional embodiment of the second aspect.

[0128] In a ninth aspect, an embodiment of the present application provides a chip or chip system, which includes at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to execute the method described in the first aspect or any optional embodiment of the first aspect, or to execute the method described in the second aspect or any optional embodiment of the second aspect. The communication interface in the chip can be an input / output interface, a pin, or a circuit, etc.

[0129] In one possible implementation, the chip or chip system described above in the embodiments of the present application further includes at least one memory, in which instructions are stored. The memory may be a storage unit within the chip, such as a register, a cache, etc., or a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

[0130] It should be understood that the second to ninth aspects of the present application correspond to the technical solutions of the first aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible embodiments are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0131] Figure 1 A diagram of the communication system architecture provided in an embodiment of the present application;

[0132] Figure 2 Schematic diagram of the method for obtaining the timing advance provided in the embodiment of the present application Figure 1 ;

[0133] Figure 3 Schematic diagram of the method for obtaining the timing advance provided in the embodiment of the present application Figure 2 ;

[0134] Figure 4 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application Figure 1 ;

[0135] Figure 5 Schematic diagram of the structure of the network side device provided in the embodiment of the application Figure 1 ;

[0136] Figure 6 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application Figure 2 ;

[0137] Figure 7 Schematic diagram of the structure of the network side device provided in the embodiment of the application Figure 2 . DETAILED DESCRIPTION

[0138] To facilitate a clear description of the technical solutions of the embodiments of this application, the words "exemplary" or "for example" are used in the embodiments of this application to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0139] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, a--c, bc, or abc, where a, b, c can be single or multiple.

[0140] In the embodiments of this application, terms such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, the terms "first chip" and "second chip" are used solely to distinguish between different chips and do not define their order. Those skilled in the art will understand that terms such as "first" and "second" do not define the quantity or execution order, and do not necessarily define differences.

[0141] It should be noted that the phrase "when (at) ..." or "when (in) ..." in the embodiments of the present application can refer to the instant when a certain situation occurs or a period of time after the situation occurs, and the embodiments of the present application do not specifically limit this. In addition, the display interface provided in the embodiments of the present application is only an example, and the display interface may also include more or less content.

[0142] First, the terminology involved in the embodiments of this application is briefly described.

[0143] The random access procedure (RACH procedure) is the first step for a terminal device to access the network. The process by which a terminal device performs uplink synchronization and establishes a radio resource control (RRC) connection based on the radio status is called the RACH procedure.

[0144] Timing Advance (TA) is the offset between the start time of receiving a downlink subframe and the time of transmitting an uplink subframe by a terminal device.

[0145] The Timing Advance Timer (TAT) indicates the validity period of the TA.

[0146] The Distributed Unit (DU) is used in network-side devices to process physical layer protocols and real-time services.

[0147] The Centralized Unit (CU) is used in network-side equipment to process non-real-time protocols and services. One CU can control at least one DU.

[0148] A terminal device may be a device with wireless transceiver capabilities, which may be deployed on land (including indoors or outdoors, handheld or vehicle-mounted), on water (such as ships, etc.), or in the air (such as airplanes, balloons, and satellites, etc.). The terminal device may be referred to as: terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user apparatus, etc. UE includes handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication capabilities. Exemplarily, a UE may be a mobile phone, a tablet computer, or a computer with wireless transceiver capabilities. The terminal device may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. In the embodiments of the present application, the device for implementing the function of the terminal may be a terminal; or it may be a device that can support the terminal to implement the function, such as a chip system, which may be installed in the terminal.

[0149] The network-side device may include an access network device and a core network device. The device used to implement the function of the network-side device may be the network-side device, or a device that can support the network-side device to implement the function, such as a chip system, which may be installed in the network-side device.

[0150] Access network (RAN) equipment is the intermediate device that connects terminals to core network equipment wirelessly. It is primarily responsible for radio resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. Examples include NodeBs, evolved eNodeBs, base stations in 5G mobile communication systems or next-generation radio (NR) communication systems, and base stations in future mobile communication systems.

[0151] Core network (CN) equipment includes user plane function (UPF) network elements, access and mobility management function (AMF) network elements, session management function (SMF) network elements, policy control function (PCF) network elements, etc. Among them, the UPF network element is mainly responsible for the transmission of user data, while the other network elements can be called control plane function network elements, which are mainly responsible for authentication, authorization, registration management, session management, mobility management, and policy control to ensure the reliable and stable transmission of user data.

[0152] Wireless communication between communication devices may include wireless communication between network-side devices and terminals, wireless communication between network-side devices, and wireless communication between terminals. "Wireless communication" can also be simply referred to as "communication," and the term "communication" can also be described as "data transmission," "information transmission," or "transmission." Those skilled in the art can apply the technical solutions provided in the embodiments of this application to wireless communication between network-side devices and terminals, such as wireless communication between access network devices and terminals, and wireless communication between core network devices and terminals.

[0153] Terminal devices or network-side devices include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as the central processing unit (CPU), memory management unit (MMU), and memory (also known as main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as the Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software.

[0154] Next, conventional technology will be described.

[0155] In traditional technology, LTM is introduced in NR. For LTM, the serving cell triggers the terminal device to send a random access preamble to the candidate cell. After the candidate cell determines the timing advance TA, it sends the TA to the serving cell. When the serving cell sends a switching command to the terminal device, it brings the TA of the target candidate cell to the terminal device. For the cell change mechanism (called conditional LTM, or conditional LTM, or terminal-triggered LTM, etc.), the terminal device needs to first obtain the TA of as many candidate cells as possible, and then measure the relevant conditions by itself. After determining that the relevant conditions are met, it performs RACH-less switching based on the obtained TA. Therefore, how the terminal device can obtain the TA of as many cells as possible in advance to reduce the access delay of the terminal device has become a technical problem that needs to be solved urgently.

[0156] In order to solve the above-mentioned problems, the present application provides a method for obtaining a timing advance. In this regard, an embodiment of the present application provides a method for obtaining a timing advance. The technical solution provided in the embodiment of the present application can be applied to the Long Term Evolution (LTE) architecture, and can also be applied to the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) architecture, or the Global System for Mobile Communications (GSM) / Enhanced Data Rate for GSM Evolution (EDGE) system radio access network (GSM EDGE Radio Access Network, GERAN) architecture. In addition, the technical solution provided in the embodiment of the present application can also be applied to any other wireless communication system with similar structure and function, such as a Public Land Mobile Network (PLMN) system, a 5G communication system or a communication system after 5G, etc., and the embodiment of the present application does not impose any limitation on this.

[0157] In the method for obtaining the timing advance provided in the present application, the terminal device initiates a random access process to at least one first cell according to the conditional configuration information to obtain the TA of at least one first cell. This can ensure that the terminal device obtains the TA of at least one first cell in advance, increases the probability of the terminal device executing RACH-less, and reduces the access delay of the terminal device.

[0158] In order to better understand the method for obtaining the timing advance provided in the embodiment of the present application, first combine Figure 1 The communication system architecture of the embodiment of the present application is described.

[0159] For example, Figure 1 This is a diagram of the communication system architecture provided in the embodiment of this application. Figure 1 As shown, the communication system 100 includes a terminal device 101 and a network side device 102. The network side device 102 includes an access network device 1021 and a core network device 1022. The terminal device 101 can communicate wirelessly with the network side device 102 to obtain the TA of at least one first cell.

[0160] The technical solutions shown in this application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other. For the same or similar content, such as the explanation of terms or nouns, and the explanation of steps, etc., different embodiments can refer to each other and will not be repeated.

[0161] Figure 2 Schematic diagram of the method for obtaining the timing advance provided in the embodiment of the present application Figure 1 .like Figure 2 As shown, the method for obtaining the timing advance includes:

[0162] S201. The terminal device initiates a random access process to at least one first cell according to conditional configuration information to obtain a TA of the at least one first cell, where the at least one first cell includes a serving cell and / or a non-serving cell.

[0163] The conditional configuration information may be information pre-set in the terminal device, or may be information dynamically configured for the terminal device by the network side device.

[0164] The conditional configuration information is used by the terminal device to determine whether to initiate a random access process to at least one first cell.

[0165] Optionally, the at least one first cell may be a cell pre-configured by the network side device for the terminal device.

[0166] Optionally, the at least one first cell may also be a cell indicated by the conditional configuration information.

[0167] Optionally, the condition configuration information includes identification related information, and at least one first cell is indicated by the identification related information.

[0168] The identification related information may be a cell unique identifier (Cell ID) of at least one first cell, a low-layer triggered mobility (L1 / L2-triggered mobility, LTM) configuration identifier (also referred to as an LTM candidate configuration identifier (LTMcandidate configuration identity)), and a physical cell identifier (Physical Cell Identifier, PCI).

[0169] The identifier-related information may be an identifier of at least one group. In this case, the at least one first cell is a cell in at least one group, or a target cell in at least one group.

[0170] Optionally, the group may be a cell group, or may correspond to a centralized unit (CU), or may correspond to a distributed unit (DU).

[0171] Optionally, the target cell may be a cell whose priority is greater than a preset priority, or a cell whose signal quality is greater than and / or equal to a first cell signal correlation threshold.

[0172] In an embodiment of the present application, the terminal device initiates a random access process to at least one first cell according to the conditional configuration information to obtain the TA of at least one first cell, so that the terminal device can obtain the TA of as many first cells as possible in advance in the conditional LTM, increase the probability of the terminal device executing RACH-less, and reduce the access delay of the terminal device.

[0173] Based on the above embodiments, Figure 3 The method for obtaining the timing advance provided in this application is described in detail.

[0174] Figure 3 Schematic diagram of the method for obtaining the timing advance provided in the embodiment of the present application Figure 2 .like Figure 3 As shown, the method for obtaining the timing advance includes:

[0175] S301. The terminal device sends device capability information to the network device.

[0176] Optionally, the device capability information may include a capability indication and / or a first quantity.

[0177] The capability indication is used to indicate whether the terminal device is able to obtain the TA in advance.

[0178] The first number indicates the number of cells that can provide early feedback on the TA.

[0179] S302: The network-side device sends first configuration information to the terminal device.

[0180] Optionally, the network side device determines whether the terminal device can obtain the TA in advance based on the capability indication in the device capability information, and if it is determined that the terminal device can obtain the TA in advance, sends the first configuration information to the terminal device.

[0181] Optionally, the first configuration information may include conditional configuration information and random access related configuration information.

[0182] Optionally, after S301, if it is determined that the terminal device can obtain the TA in advance, conditional configuration information and random access related configuration information may be sent to the terminal device respectively.

[0183] In an optional embodiment, the conditional configuration information includes one or more of the following:

[0184] First cell signal correlation threshold;

[0185] Serving cell signal related threshold;

[0186] The duration of the first timing advance timer (TA timer, TAT);

[0187] a duration of at least one second TAT, the at least one second TAT corresponding to the at least one first cell;

[0188] an identifier of at least one group;

[0189] The identifier of the first CU;

[0190] The identifier of the first DU.

[0191] Optionally, the random access related configuration information may be the configuration information in the following manner 1 and manner 2.

[0192] In method 1, the random access configuration information includes one or more of the following:

[0193] (a2) a random access preamble corresponding to at least one first cell;

[0194] (b2) a random access preamble corresponding to at least one group, the at least one group including at least one first cell;

[0195] (c2) a random access preamble corresponding to each cell in at least one group;

[0196] (d2) frequency information of at least one first cell;

[0197] (e2) a first random access channel (RACH)-related configuration of at least one first cell, where the first RACH-related configuration of the at least one first cell is used by the terminal device to receive at least one reply message, where the at least one reply message includes the TA of the at least one first cell;

[0198] (f2) a first period of at least one first cell;

[0199] (g2) a first time window of at least one first cell;

[0200] (h2) First TAT related information.

[0201] The number of the at least one first cell may be less than or equal to the first number.

[0202] The frequency information of the first cell is a basic parameter of an uplink carrier used for sending a random access preamble to the cell.

[0203] The first period may be a time interval for triggering a random access procedure, or a time interval for sending a random access preamble code.

[0204] The first RACH related configuration may include the time domain, frequency domain, code domain position sent by PRACH (prach-ConfigurationIndex, msg1-FDM, msg1-FrequencyStart, etc.), reference signal related information (SSB or CSI-RS related information), random access response (Random Access Response, RAR) window (ra-ResponseWindow), power related information (powerRampingStep), etc.

[0205] In an optional embodiment, the first period of the first cell is:

[0206] (f21) the duration of sending the random access preamble to the first cell at least once; or

[0207] (f22) After sending the random access preamble to the first cell, the duration of not sending the random access preamble to the first cell; or

[0208] (f23) The reset duration of the synchronization period timer, when the synchronization period timer times out, sends a random access preamble code to the first cell once.

[0209] In this application, "sending at least once to..." includes sending once or multiple times to... In this application, sending multiple random access preambles can avoid the first cell failing to detect the random access preamble, thereby improving the reliability of the terminal device acquiring the TA of the first cell.

[0210] In an optional embodiment, the first time window of the first cell is any one of the following:

[0211] (g21) sending a random access preamble to the first cell for a period of time;

[0212] (g22) Sending a random access preamble code to at least one first cell for a period of time.

[0213] Optionally, when the first periods of at least one first cell are different, the first time window of the first cell is (g21); when the first periods of at least one first cell are the same, the first time window of the first cell is (g22).

[0214] Optionally, the first TAT-related information may be the TAT-related information in the following manner 3 or manner 4.

[0215] Method 3: TAT-related information: one or more of the following:

[0216] First TAT;

[0217] at least one second TAT, the at least one second TAT corresponding to the at least one first cell;

[0218] At least one third TAT, the at least one third TAT corresponding to the at least one packet.

[0219] Method 4: TAT-related information includes one or more of the following:

[0220] First TAT duration;

[0221] At least one second TAT duration, where the at least one second TAT duration corresponds to the at least one first cell;

[0222] At least one third TAT duration, where the at least one third TAT duration corresponds to at least one packet.

[0223] In an optional embodiment, the random access-related configuration information includes one or more of the following:

[0224] (a3) at least one random access preamble;

[0225] (b3) a second RACH-related configuration, used for the terminal device to receive at least one reply message, where the at least one reply message includes the TA of the at least one first cell;

[0226] (c3) second cycle;

[0227] (d3) second time window;

[0228] (e3) Second TAT related information.

[0229] Optionally, the second RACH-related configuration may be similar to the first RACH-related configuration, and details thereof will not be repeated here.

[0230] The second period may also be a time interval for triggering a random access procedure, or a time interval for sending a random access preamble code.

[0231] In an optional embodiment, the second cycle may be:

[0232] (c31) the duration of sending a random access preamble code at least once to at least one first cell; or

[0233] (c32) after sending a random access preamble to at least one first cell, a duration for which a random access preamble is no longer sent to at least one first cell; or

[0234] (c33) The reset duration of the synchronization period timer. When the synchronization period timer times out, a random access preamble code is sent to at least one first cell once.

[0235] In an optional embodiment, the second time window is a time period occupied by sending a random access preamble code to at least one first cell.

[0236] In an optional embodiment, the second TAT-related information may include the TAT (and / or TAT duration) corresponding to the terminal.

[0237] S303. When the terminal device determines that the first condition is met according to the condition configuration information, the terminal device sends a random access preamble code to the at least one first cell according to the random access related configuration information to obtain the TA of the at least one first cell.

[0238] Optionally, when the terminal device determines that the first condition is not met according to the condition configuration information, it stops or suspends sending the random access preamble code to at least one first cell according to the random access related configuration information.

[0239] Optionally, the at least one first cell may be a cell preconfigured by the network side device for the terminal device, or a cell indicated by the identification related information. The identification related information may be included in the first configuration information, or the conditional configuration information, or the random access related configuration information.

[0240] Optionally, when determining, based on the conditional configuration information, that the first condition is not satisfied, the terminal device may stop or suspend initiating a random access procedure to the at least one first cell based on the random access-related configuration information, and when determining, based on the conditional configuration information, that the first condition is satisfied, the terminal device may continue to send a random access preamble to the at least one first cell based on the random access-related configuration information. This eliminates the need for the terminal device to continuously send a random access preamble to the at least one first cell, thereby reducing the signaling overhead of transmitting the random access preamble and eliminating unnecessary random access procedures.

[0241] In an optional embodiment, the first condition includes one or more of the following:

[0242] (a1) the signal quality of at least one first cell is greater than and / or equal to a first cell signal correlation threshold;

[0243] (b1) the signal quality of at least one first cell decreases the first cell signal correlation threshold;

[0244] (c1) The signal quality of the serving cell is less than and / or equal to the serving cell signal related threshold;

[0245] (d1) The signal quality of the serving cell reduces the serving cell signal correlation threshold;

[0246] (e1) the signal quality of at least one cell or a specific cell in at least one group is greater than and / or equal to the first cell signal correlation threshold;

[0247] (f1) the signal quality of at least one cell or a specific cell in at least one group is lower than the first cell signal correlation threshold;

[0248] (g1) First TAT timeout;

[0249] (h1) at least one second TAT times out;

[0250] (i1) There exists a cell or a specific cell under the first CU whose signal quality is greater than and / or equal to the first cell signal correlation threshold;

[0251] (j1) There exists a cell or a specific cell in the first DU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0252] (k1) The terminal device accesses the second cell, and the CU to which the second cell belongs is the first CU;

[0253] (11) The terminal device accesses the third cell, and the DU to which the third cell belongs is the first DU;

[0254] (m1) the signal quality of the first cell is better than the signal quality of the serving cell by a first threshold;

[0255] (n1) There is a first cell in the at least one first cell whose signal quality is greater than the first and second thresholds, wherein the first cell whose signal quality is greater than the first and second thresholds belongs to the first CU.

[0256] (o1) Among at least one first cell, there is a first cell whose signal quality is greater than a second threshold, wherein the first cell whose signal quality is greater than the second threshold belongs to the first DU.

[0257] In an optional embodiment, the at least one first cell is any one of the following: a cell in at least one group, a target cell in at least one group, a cell under the first CU, a cell under the first DU, a target cell under the first CU, or a target cell under the first DU. The target cell may be a cell having a priority greater than or equal to a preset priority, or a cell having a signal quality greater than and / or equal to a first cell signal-related threshold, or a pre-specified cell in the group, CU, or DU to which it belongs.

[0258] In an embodiment of the present application, the first condition includes one or more of (a1) to (o1), so that the terminal device can determine whether to send a random access preamble code based on the signal quality, ensuring that the terminal device obtains the TA of at least one first cell in advance without being aware of the network, thereby improving the performance of the terminal device in obtaining the TA.

[0259] With respect to (a1), when a greater signal quality indicates a better signal, it may include that the signal quality of one or all of the at least one first cell is greater than and / or equal to a first cell signal-related threshold.

[0260] Optionally, in the case that a smaller signal quality indicates a better signal, the first condition may further include: the signal quality of one or more first cells in the at least one first cell is less than and / or equal to a first cell signal-related threshold.

[0261] Optionally, (b1) may include reducing the signal quality of one or more first cells in the at least one first cell by a first cell signal-related threshold. The "reduction" involved in the first condition of the embodiment of the present application represents a difference in signal quality obtained from two measurements, where the signal quality obtained from the two measurements may be two measurement results within a certain period of time.

[0262] With respect to (c1), when a greater signal quality indicates a better signal, the signal quality of the serving cell is less than and / or equal to a serving cell signal-related threshold.

[0263] Optionally, in the case that a smaller signal quality indicates a better signal, the first condition may further include: the signal quality of the serving cell is greater than and / or equal to a serving cell signal-related threshold.

[0264] Optionally, (h1) may include one or more second TAT timeouts in the at least one second TAT.

[0265] Optionally, (m1) indicates that the difference between the signal quality of the first cell and the signal quality of the serving cell is greater than and / or equal to a first threshold, or the difference between the signal quality of the first cell and the signal quality of the serving cell is less than and / or equal to the first threshold.

[0266] For example, in the case where a greater signal quality indicates a better signal, (m1) indicates that the difference between the signal quality of the first cell and the signal quality of the serving cell is greater than and / or equal to the first threshold.

[0267] For example, in the case where smaller signal quality indicates better signal, (m1) indicates that the difference between the signal quality of the first cell and the signal quality of the serving cell is less than and / or equal to the first threshold.

[0268] Optionally, when the first condition includes (e1) and / or (f1), the at least one first cell may also be a cell in at least one group whose signal quality is greater than and / or equal to a first cell signal correlation threshold.

[0269] S303 is described below in combination with some situations of the first condition and some situations of the random access related configuration information in mode 1.

[0270] (11) The first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a2) and (d2);

[0271] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), for each first cell, the terminal device sends the random access preamble code corresponding to the first cell at least once to the first cell according to the frequency information corresponding to the first cell.

[0272] (12) The first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a2), (d2), and (f21);

[0273] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), for each first cell, within the first period of the first cell, the terminal device sends the random access preamble code corresponding to the first cell to the first cell at least once according to the frequency information corresponding to the first cell.

[0274] (13) The first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a2), (d2), and (f23);

[0275] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), for each first cell, after sending the random access preamble code corresponding to the first cell at least once to the first cell according to the frequency information corresponding to the first cell, the synchronization period timer is reset, and when the synchronization period timer times out, the random access preamble code corresponding to the first cell is sent to the first cell at least once, and the reset duration of the synchronization period timer is the first period corresponding to the first cell.

[0276] (14) The first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a2), (d2), (f22), and (g21);

[0277] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), for each first cell, it periodically takes N*Tcycle as the starting time, and according to the frequency information corresponding to the first cell, sends the random access preamble code corresponding to the first cell to the first cell at least once within the TWindow of the first cell; wherein N is an integer greater than and / or equal to 0, Tcycle represents the first period corresponding to the first cell, and TWindow represents the first time window corresponding to the first cell.

[0278] (15) The first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a2), (d2), and (g22);

[0279] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), based on the frequency information corresponding to the at least one first cell, the terminal device sends a corresponding random access preamble code to the at least one first cell at least once within the first time window.

[0280] (16) The first condition includes (e1) or (f1), and the random access-related configuration information includes (b2) and (d2);

[0281] When the terminal device is in (e1) or (f1), for each first cell, according to the frequency information corresponding to the first cell, the terminal device sends a random access preamble code corresponding to the group to which the first cell belongs to the first cell.

[0282] (17) The first condition includes (e1) or (f1), and the random access-related configuration information includes (b2) and (c2);

[0283] When the terminal device is in (e1) or (f1), for each first cell, according to the frequency information corresponding to the first cell, the terminal device sends a random access preamble code corresponding to the first cell in the group to which the first cell belongs to the first cell.

[0284] (18) The first condition includes (h1), and the random access related configuration information includes (a2) and (d2);

[0285] At (h1), the terminal device sends a random access preamble code corresponding to the first cell to each first cell where the second TAT times out according to the frequency information corresponding to the first cell.

[0286] S303 is described below in combination with some situations of the first condition and some situations of random access related configuration information in mode 2.

[0287] (21), the first condition includes (a1), (b1), (c1), (d1), or (g1), and the random access-related configuration information includes (a3);

[0288] When the terminal device is in (a1), (b1), (c1), (d1) or (g1), for each first cell:

[0289] Send a random access preamble randomly selected from at least one random access preamble to the first cell at least once; or, when at least one random access preamble corresponds to at least one first cell (that is, one random access preamble corresponds to one first cell), send the random access preamble corresponding to the first cell at least once to the first cell.

[0290] (22), the first condition includes (a1), (b1), (c1), (d1) or (g1); the random access related configuration information includes (a3) and (c32) and the second time window;

[0291] At (a1), (b1), (c1), (d1), or (g1), the terminal device periodically sends a random access preamble code to at least one first cell within a second time window, starting at N*Tcycle1. Wherein, N is an integer greater than and / or equal to 0, and Tcycle1 represents the second period.

[0292] In an optional embodiment, after receiving the first configuration information, the terminal device may determine whether to initiate a random access procedure to at least one first cell (i.e., send a random access preamble code to at least one first cell) based on implementation.

[0293] In an implementation-based case, the terminal device may directly send a random access preamble code to at least one first cell according to random access-related configuration information.

[0294] For example, when (f2) is included in the random access related configuration information, for each first cell, a random access preamble code is sent to the first cell at least once every first period.

[0295] For example, when (f2) and (g2) are included in the random access related configuration information, for each first cell, a random access preamble code is sent to the first cell at least once within the first time window of the first cell every first period.

[0296] Based on the above embodiment, obtaining the TA of at least one first cell includes:

[0297] At least one reply message is received, where the at least one reply message includes a TA of at least one first cell.

[0298] Optionally, the reply message can be one or more of the following:

[0299] Through Random Access Response (RAR).

[0300] Medium Access Control Control Element (MAC CE).

[0301] When the random access-related configuration information includes the first RACH-related configuration, at least one reply message may be received according to the first RACH-related configuration of at least one first cell.

[0302] When the random access-related configuration information includes the second RACH-related configuration, at least one reply message may be received according to the second RACH-related configuration.

[0303] The following describes the operations of the terminal device after obtaining the TA of at least one first cell in some cases of the first TAT related information.

[0304] (31) When the TAT-related information includes a first TAT duration (or a first TAT), after obtaining the TA of at least one first cell, the first TAT is started.

[0305] (32) When the TAT-related information includes at least one second TAT duration (or at least one second TAT), for each first cell, after the TA of the first cell is obtained, the second TAT corresponding to the first cell is started.

[0306] (33) When the TAT-related information includes at least one third TAT duration (or at least one third TAT), for each packet, after the TA corresponding to the packet is obtained, the third TAT corresponding to the packet is started.

[0307] Optionally, at least one reply message also includes a fourth TAT duration (and / or fourth TAT), or a TAT duration (and / or TAT) corresponding to at least one first cell, or a fifth TAT duration (and / or fifth TAT) corresponding to at least one group.

[0308] The following describes the operation of the terminal device after obtaining the TA of at least one first cell in combination with the first TAT related information and at least one reply information.

[0309] (41) at least one reply message further includes a fourth TAT duration (and / or a fourth TAT, wherein the duration of the fourth TAT is the fourth TAT duration);

[0310] When the first TAT related information does not include the first TAT duration (and / or the first TAT), after acquiring the TA of at least one first cell, the terminal device starts the fourth TAT; or,

[0311] When the first TAT duration (and / or first TAT) is included in the first TAT related information, after obtaining the TA of at least one first cell, the terminal device updates the first TAT duration (and / or first TAT) to a fourth TAT duration (and / or fourth TAT) and starts the fourth TAT.

[0312] (42) The at least one reply message further includes a TAT duration (and / or TAT, where the TAT duration is equal to the TAT duration) corresponding to at least one first cell;

[0313] When the first TAT related information does not include at least one second TAT duration (and / or at least one second TAT), for each first cell, after obtaining the TA of the first cell, the terminal device starts the TAT length corresponding to the first cell; or,

[0314] When the first TAT-related information includes at least one second TAT duration (and / or at least one second TAT), for each first cell, after obtaining the TA of the first cell, the second TAT duration (and / or second TAT) corresponding to the first cell is updated to the TAT duration (and / or TAT) corresponding to the first cell, and the TAT corresponding to the first cell is started.

[0315] (43) The at least one reply message further includes a fifth TAT duration corresponding to at least one packet (and / or a fifth TAT, the duration of the fifth TAT being equal to the fifth TAT duration);

[0316] When the first TAT-related information does not include at least one third TAT duration (and / or at least one third TAT), for each packet, after obtaining the TA corresponding to the packet, the terminal device starts the fifth TAT corresponding to the packet; or,

[0317] When the first TAT-related information includes at least one third TAT duration (and / or at least one third TAT), for each packet, after obtaining the TA corresponding to the packet, the third TAT duration (and / or third TAT) corresponding to the packet is updated to the fifth TAT duration (and / or fifth TAT) corresponding to the packet, and the fifth TAT corresponding to the packet is started.

[0318] The following describes the operation of the terminal device after obtaining the TA of at least one first cell in combination with the second TAT related information and at least one reply message.

[0319] (51) At least one reply message further includes a TAT duration (and / or TAT, where the TAT duration is equal to the TAT duration) corresponding to at least one first cell;

[0320] When the TAT (and / or TAT duration) corresponding to the terminal device is not included (or is not included) in the second TAT related information, after acquiring the TA of at least one first cell, the terminal device starts the TAT corresponding to each first cell.

[0321] The above describes the method for obtaining the timing advance value in the embodiment of the present application. The following describes the apparatus for performing the above method provided in the embodiment of the present application. Those skilled in the art will appreciate that the method and apparatus can be combined and referenced with each other, and the relevant apparatus provided in the embodiment of the present application can perform the steps in the above-mentioned list sorting method.

[0322] Figure 4 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application Figure 1 .like Figure 4 As shown, the terminal device 40 of this embodiment includes:

[0323] The sending module 401 is configured to initiate a random access procedure to at least one first cell according to the conditional configuration information to obtain a timing advance TA of the at least one first cell, where the at least one first cell includes a serving cell and / or a non-serving cell.

[0324] The terminal device provided in this embodiment is used to implement the technical solution of the terminal device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0325] In an optional embodiment, the conditional configuration information includes one or more of the following:

[0326] First cell signal correlation threshold;

[0327] Serving cell signal related threshold;

[0328] The duration of the first timing advance timer TAT;

[0329] a duration of at least one second TAT, the at least one second TAT corresponding to the at least one first cell;

[0330] an identifier of at least one group;

[0331] The identifier of the first CU;

[0332] The identifier of the first DU.

[0333] In an optional embodiment, the sending module 401 is specifically configured to: initiate a random access procedure to at least one first cell when a first condition is met;

[0334] The first condition includes one or more of the following:

[0335] The signal quality of the at least one first cell is greater than and / or equal to the first cell signal correlation threshold;

[0336] The signal quality of the serving cell is less than and / or equal to the serving cell signal-related threshold, or the signal quality is lower than the serving cell signal-related threshold;

[0337] The signal quality of the first cell is better than the signal quality of the serving cell by a first threshold;

[0338] The first TAT times out;

[0339] the at least one second TAT times out;

[0340] There exists a cell under the first CU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0341] There exists a cell under the first DU whose signal quality is greater than and / or equal to the first cell signal-related threshold;

[0342] The terminal device accesses a second cell, and the CU to which the second cell belongs is the first CU;

[0343] The terminal device accesses a third cell, and the DU to which the third cell belongs is the first DU.

[0344] In an optional embodiment, the at least one first cell is any one of the following:

[0345] The cell under the first CU;

[0346] The cell under the first DU.

[0347] In an optional embodiment, the sending module 401 is specifically configured to:

[0348] Send a random access preamble code to the at least one first cell according to the random access related configuration information to obtain the TA of the at least one first cell.

[0349] In an optional embodiment, the random access related configuration information includes one or more of the following:

[0350] a random access preamble code corresponding to the at least one first cell;

[0351] a random access preamble corresponding to at least one group, wherein the at least one group includes the at least one first cell;

[0352] a random access preamble corresponding to each cell in the at least one group;

[0353] frequency information corresponding to at least one first cell;

[0354] a first random access channel (RACH)-related configuration of at least one first cell, where the first RACH-related configuration of the at least one first cell is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0355] a first period of at least one first cell;

[0356] a first time window of at least one first cell;

[0357] First TAT related information.

[0358] In an optional embodiment, the first period of the first cell is:

[0359] The duration of sending the random access preamble to the first cell at least once; or

[0360] After sending the random access preamble to the first cell, the duration of not sending the random access preamble to the first cell; or,

[0361] The reset duration of the synchronization period timer is used to send a random access preamble code to the first cell once when the synchronization period timer times out.

[0362] In an optional embodiment, the first time window of the first cell is a time period occupied by sending a random access preamble code to the first cell, or a time period occupied by sending a random access preamble code to the at least one first cell.

[0363] In an optional embodiment, the random access related configuration information includes one or more of the following:

[0364] at least one random access preamble;

[0365] A second RACH-related configuration is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell;

[0366] Second cycle;

[0367] Second time window;

[0368] Second TAT related information.

[0369] In an optional embodiment, the second period is:

[0370] a duration occupied by sending a random access preamble code at least once to the at least one first cell; or

[0371] After sending the random access preamble to the at least one first cell, the duration of not sending the random access preamble to the at least one first cell; or,

[0372] The reset duration of the synchronization period timer is used to send a random access preamble code to the at least one first cell once when the synchronization period timer times out.

[0373] In an optional embodiment, the second time window is a time period occupied by sending a random access preamble code to the at least one first cell.

[0374] In an optional embodiment, the terminal device further includes:

[0375] The receiving module is configured to receive at least one reply message, where the at least one reply message includes the TA of the at least one first cell.

[0376] In an optional embodiment, the at least one reply message further includes a TAT corresponding to the at least one first cell.

[0377] The terminal device provided in this embodiment is used to implement the technical solution of the terminal device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0378] Figure 5 Schematic diagram of the structure of the network side device provided in the embodiment of the application Figure 1 .like Figure 5 As shown, the network side device 50 of this embodiment includes:

[0379] The sending module 501 is used to send conditional configuration information to the terminal device.

[0380] The network-side device provided in this embodiment is used to implement the technical solution of the network-side device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0381] In an optional embodiment, the sending module 501 is further configured to:

[0382] Send random access related configuration information to the terminal device.

[0383] Figure 6 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application Figure 2 .like Figure 6 As shown, the terminal device 60 of this embodiment includes a memory 601, a processor 602, and a transceiver 603. The transceiver 603 may include a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, a transmitter, a transmitting port, a transmitting interface, or similar descriptions, and the receiver may also be referred to as a receiver, a receiving port, a receiving interface, or similar descriptions. For example, the memory 601, the processor 602, and the transceiver 603 are interconnected via a bus 604.

[0384] The memory 601 is used to store computer-executable instructions.

[0385] The processor 602 is used to execute the computer execution instructions stored in the memory, so that the terminal device executes the method steps executed by the terminal device in the aforementioned method embodiment. Its implementation principles and technical effects are similar and will not be repeated here.

[0386] Figure 7 Schematic diagram of the structure of the network side device provided in the embodiment of the application Figure 2 .like Figure 7As shown, the network-side device 70 of this embodiment includes a memory 701, a processor 702, and a transceiver 703. The transceiver 703 may include a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, a transmitter, a transmitting port, a transmitting interface, or similar descriptions, and the receiver may also be referred to as a receiver, a receiving port, a receiving interface, or similar descriptions. For example, the memory 701, the processor 702, and the transceiver 703 are interconnected via a bus 704.

[0387] The memory 701 is used to store computer-executable instructions.

[0388] The processor 702 is used to execute the computer execution instructions stored in the memory, so that the network side device executes the method steps executed by the network side device in the aforementioned method embodiment. Its implementation principles and technical effects are similar and will not be repeated here.

[0389] The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method executed by the terminal device or the method executed by the network device in the above-mentioned embodiment.

[0390] An embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is run, the computer executes the method executed by the terminal device or the method executed by the network side device in the above embodiment.

[0391] An embodiment of the present application provides a chip or chip system, which includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by lines, and the at least one processor is used to run computer programs or instructions to execute the method executed by the terminal device in the above embodiment or the method executed by the network side device.

[0392] The communication interface in the chip may be an input / output interface, a pin or a circuit, etc.

[0393] It should be noted that the module names involved in the embodiments of the present application can be defined as other names as long as the functions of each module can be achieved, and there is no specific restriction on the names of the modules.

[0394] The methods described in the above embodiments can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. Computer-readable media can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium that can be accessed by a computer.

[0395] In one possible implementation, a computer-readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other medium intended to carry or store the desired program code in the form of instructions or data structures and accessible by a computer. Moreover, any connection is appropriately referred to as a computer-readable medium. For example, if a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave) is used to transmit software from a website, server or other remote source, the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of medium. Disk and optical disc as used herein include optical disc, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks generally reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0396] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0397] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for obtaining a timing advance, characterized in that: Applied to a terminal device, the method includes: According to the condition configuration information, a random access procedure is initiated to at least one first cell to obtain a timing advance TA of the at least one first cell, where the at least one first cell includes a serving cell and / or a non-serving cell.

2. The method according to claim 1, characterized in that The condition configuration information includes one or more of the following: First cell signal correlation threshold; Serving cell signal related threshold; The duration of the first timing advance timer TAT; a duration of at least one second TAT, the at least one second TAT corresponding to the at least one first cell; an identifier of at least one group; The identifier of the first CU; The identifier of the first DU.

3. The method according to claim 2, characterized in that Initiating a random access procedure to at least one first cell according to the conditional configuration information, including: When a first condition is met, initiating a random access procedure to at least one first cell; The first condition includes one or more of the following: The signal quality of the at least one first cell is greater than and / or equal to the first cell signal correlation threshold; The signal quality of the serving cell is less than and / or equal to the serving cell signal-related threshold, or the signal quality is lower than the serving cell signal-related threshold; The signal quality of the first cell is better than the signal quality of the serving cell by a first threshold; The first TAT times out; the at least one second TAT times out; There exists a cell under the first CU whose signal quality is greater than and / or equal to the first cell signal-related threshold; There exists a cell under the first DU whose signal quality is greater than and / or equal to the first cell signal-related threshold; The terminal device accesses a second cell, and the CU to which the second cell belongs is the first CU; The terminal device accesses a third cell, and the DU to which the third cell belongs is the first DU.

4. The method according to claim 3, characterized in that The at least one first cell is any one of the following: The cell under the first CU; The cell under the first DU.

5. The method according to any one of claims 1 to 4, characterized in that Initiating a random access procedure to at least one first cell to obtain a TA of the at least one first cell includes: Send a random access preamble code to the at least one first cell according to the random access related configuration information to obtain the TA of the at least one first cell.

6. The method according to claim 5, characterized in that The random access related configuration information includes one or more of the following: a random access preamble code corresponding to the at least one first cell; a random access preamble corresponding to at least one group, wherein the at least one group includes the at least one first cell; a random access preamble corresponding to each cell in the at least one group; frequency information corresponding to at least one first cell; a first random access channel (RACH)-related configuration of at least one first cell, where the first RACH-related configuration of the at least one first cell is used by the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell; a first period of at least one first cell; a first time window of at least one first cell; First TAT related information.

7. The method according to claim 6, characterized in that The first period of the first cell is: The duration of sending the random access preamble to the first cell at least once; or After sending the random access preamble to the first cell, the duration of not sending the random access preamble to the first cell; or, The reset duration of the synchronization period timer is used to send a random access preamble code to the first cell once when the synchronization period timer times out.

8. The method according to claim 6 or 7, characterized in that The first time window of the first cell is a time period occupied by sending a random access preamble to the first cell, or a time period occupied by sending a random access preamble to the at least one first cell.

9. The method according to claim 5, characterized in that The random access related configuration information includes one or more of the following: at least one random access preamble; A second RACH-related configuration is used for the terminal device to receive at least one reply message, where the at least one reply message includes a TA of the at least one first cell; Second cycle; Second time window; Second TAT related information.

10. The method according to claim 9, characterized in that The second cycle is: a duration occupied by sending a random access preamble code at least once to the at least one first cell; or After sending the random access preamble to the at least one first cell, the duration of not sending the random access preamble to the at least one first cell; or, The reset duration of the synchronization period timer is used to send a random access preamble code to the at least one first cell once when the synchronization period timer times out.

11. The method according to claim 9 or 10, characterized in that The second time window is a period of time occupied by sending a random access preamble code to the at least one first cell.

12. The method according to any one of claims 1 to 11, characterized in that Acquiring the TA of the at least one first cell includes: At least one reply message is received, where the at least one reply message includes the TA of the at least one first cell.

13. The method according to claim 12, characterized in that The at least one reply message further includes a TAT corresponding to the at least one first cell.

14. A method for obtaining a timing advance, characterized in that: Applied to a network-side device, the method includes: Send conditional configuration information to the terminal device.

15. The method according to claim 14, characterized in that The method further comprises: Send random access related configuration information to the terminal device.

16. A terminal device, characterized in that: include: processor and memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the terminal device performs the method according to any one of claims 1 to 13.

17. A network side device, characterized in that: include: processor and memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the network-side device executes the method according to claim 14 or 15.

18. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 13 or the method according to claim 14 or 15 is implemented.

19. A computer program product, characterized in that The method comprises a computer program which, when being executed, causes a computer to execute the method according to any one of claims 1 to 13 or the method according to claim 14 or 15.

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