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 terminals and communication. The method comprises: receiving at least one first message, the at least one first message comprising timing advance (TA) related information of at least one first cell, the TA related information comprising a TA and / or a TA group identifier, and the at least one first cell comprising a serving cell and / or a non-serving cell. The method is used for the terminal to obtain TA of a plurality of first cells and reduce the access delay of the terminal.

Description

Technical Field

[0001] The present application relates to the field of terminal technology and communication technology, 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] In L1 / L2-triggered mobility (LTM), a terminal initiates RACH procedures to multiple cells. When initiating RACH procedures to multiple cells, how the terminal obtains the TAs of the multiple cells to reduce the terminal's access latency has become a pressing technical issue. Summary of the Invention

[0004] The present invention provides a method, device, and storage medium for obtaining a timing advance, which relate to terminal technology and communication technology, and are used by a terminal to obtain TAs of multiple first cells to reduce the access delay of the terminal.

[0005] In a first aspect, an embodiment of the present application provides a method for obtaining a timing advance, which is applied to a terminal. The method includes:

[0006] Receive at least one first message, wherein the at least one first message includes timing advance TA-related information of at least one first cell, the TA-related information includes a TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0007] In an optional implementation, the at least one first message further includes one or more of:

[0008] at least one timing advance timer TAT;

[0009] Process end indication;

[0010] at least one random access preamble;

[0011] an index of at least one random access preamble;

[0012] At least one random access procedure index;

[0013] At least one cell-related identifier.

[0014] In an optional implementation manner, the at least one first message is a message received by initiating at least one random access procedure according to configuration information.

[0015] In an optional implementation, the configuration information includes one or more of the following:

[0016] a first transmission resource corresponding to each first cell;

[0017] at least one first sending window;

[0018] a first receiving resource corresponding to each first cell;

[0019] at least one first receiving window;

[0020] Dedicated receiving window;

[0021] The number of random access procedures initiated.

[0022] In an optional implementation, the configuration information includes a first transmission resource corresponding to each first cell; and receiving at least one first message includes:

[0023] For each first cell, a first message corresponding to the first cell is received based on a first receiving resource corresponding to the first cell.

[0024] In an optional implementation, the configuration information includes the at least one first sending window, and the at least one first receiving window corresponds to the at least one first cell; receiving at least one first message includes:

[0025] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0026] In an optional implementation, the configuration information includes a first sending window, and a first receiving window corresponds to the at least one first cell; receiving at least one first message includes:

[0027] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0028] In an optional implementation, receiving a first message corresponding to the first cell includes:

[0029] receiving a first message corresponding to the first cell sent by a network node of the first cell; or,

[0030] The first cell is the non-serving cell, and receives a first message corresponding to the first cell sent by a network node of the serving cell.

[0031] In an optional implementation, the configuration information includes the dedicated receiving window; and receiving at least one first message includes:

[0032] A first message sent by a network node of a serving cell is received within the dedicated receiving window.

[0033] In an optional implementation, the configuration information includes a first transmission resource corresponding to each first cell, and the method further includes:

[0034] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell based on the first sending resource corresponding to the first cell.

[0035] In an optional implementation, the configuration information includes the at least one first sending window, the at least one first sending window corresponds to the at least one first cell, and the method further includes:

[0036] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell in a first sending window of the first cell.

[0037] In an optional implementation, the configuration information includes one first sending window, and one first sending window corresponds to the at least one first cell; and the method further includes:

[0038] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell within the first sending window.

[0039] In an optional implementation, receiving at least one first message includes: sequentially interacting with a network node of each first cell;

[0040] The signal interaction with a first cell includes:

[0041] Sending a random access preamble and / or a random access procedure index to a network node of the first cell based on a first sending resource or a first sending window corresponding to the first cell; and

[0042] Based on the first receiving resource or the first sending window corresponding to the first cell, the first message corresponding to the first cell is received and sent by the network node of the first cell, or, when the first cell is the non-service cell, the first message corresponding to the first cell is received and sent by the network node of the service cell.

[0043] In an optional implementation, the network node of the serving cell and the network node of the non-serving cell are the same as or different from each other.

[0044] In an optional implementation, the distributed unit DU controlled by the network node of the non-serving cell is configured to provide one or more of the following information:

[0045] The TA of the non-serving cell;

[0046] An index of the random access preamble of the non-serving cell;

[0047] Random access opportunity RO information;

[0048] The relevant index of the non-serving cell;

[0049] The index of the DU;

[0050] The index of the centralized unit CU corresponding to the DU;

[0051] The TAT of the non-serving cell.

[0052] 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:

[0053] Send at least one first message, wherein the at least one first message includes TA-related information of at least one first cell, the at least one first message includes TA-related information of at least one first cell, the TA-related information includes TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0054] In an optional implementation, the at least one first message further includes one or more of:

[0055] at least one timing advance timer TAT;

[0056] Process end indication;

[0057] at least one random access preamble;

[0058] an index of at least one random access preamble;

[0059] At least one random access procedure index;

[0060] At least one cell-related identifier.

[0061] In an optional implementation, sending at least one first message includes:

[0062] When the network side device includes a network node of a first cell, the network node of the first cell sends a first message corresponding to the first cell to the terminal; or,

[0063] When the network-side device includes a network node of the serving cell, the network node of the serving cell sends the at least one first message to the terminal.

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

[0065] The network side device includes a network node of a first cell, and the network node of the first cell receives a random access preamble code and / or a random access procedure index sent by the terminal.

[0066] In an optional embodiment, the method further includes:

[0067] When the network side device includes the network node of the serving cell, the network node of the serving cell sends configuration information to the terminal, where the configuration information is used by the terminal to initiate at least one random access procedure.

[0068] In an optional implementation, the configuration information includes one or more of the following:

[0069] a first transmission resource corresponding to each first cell;

[0070] at least one first sending window;

[0071] a first receiving resource corresponding to each first cell;

[0072] at least one first receiving window;

[0073] Dedicated receiving window;

[0074] The number of random access procedures initiated.

[0075] In a third aspect, an embodiment of the present application provides a communication device, the device comprising:

[0076] The receiving module is used to receive at least one first message, wherein the at least one first message includes timing advance TA related information of at least one first cell, the TA related information includes TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0077] In an optional implementation, the at least one first message further includes one or more of:

[0078] at least one timing advance timer TAT;

[0079] Process end indication;

[0080] at least one random access preamble;

[0081] an index of at least one random access preamble;

[0082] At least one random access procedure index;

[0083] At least one cell-related identifier.

[0084] In an optional implementation manner, the at least one first message is a message received by initiating at least one random access procedure according to configuration information.

[0085] In an optional implementation, the configuration information includes one or more of the following:

[0086] a first transmission resource corresponding to each first cell;

[0087] at least one first sending window;

[0088] a first receiving resource corresponding to each first cell;

[0089] at least one first receiving window;

[0090] Dedicated receiving window;

[0091] The number of random access procedures initiated.

[0092] In an optional implementation, the configuration information includes a first sending resource corresponding to each first cell; and the receiving module is specifically configured to:

[0093] For each first cell, a first message corresponding to the first cell is received based on a first receiving resource corresponding to the first cell.

[0094] In an optional implementation, the configuration information includes the at least one first sending window, and the at least one first receiving window corresponds to the at least one first cell; the receiving module is specifically configured to:

[0095] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0096] In an optional implementation, the configuration information includes a first sending window, and a first receiving window corresponds to the at least one first cell; the receiving module is specifically configured to:

[0097] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0098] In an optional implementation manner, the receiving module is specifically configured to:

[0099] receiving a first message corresponding to the first cell sent by a network node of the first cell; or,

[0100] The first cell is the non-serving cell, and receives a first message corresponding to the first cell sent by a network node of the serving cell.

[0101] In an optional implementation, the configuration information includes the dedicated receiving window; and the receiving module is specifically configured to:

[0102] A first message sent by a network node of a serving cell is received within the dedicated receiving window.

[0103] In an optional implementation, the configuration information includes a first transmission resource corresponding to each first cell, and the apparatus further includes:

[0104] The sending module is configured to send a random access preamble code and / or a random access procedure index to each first cell based on a first sending resource corresponding to the first cell.

[0105] In an optional implementation, the configuration information includes the at least one first sending window, where the at least one first sending window corresponds to the at least one first cell; and the sending module is specifically configured to:

[0106] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell in a first sending window of the first cell.

[0107] In an optional implementation, the configuration information includes a first sending window, where the first sending window corresponds to the at least one first cell; and the sending module is specifically configured to:

[0108] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell within the first sending window.

[0109] In an optional implementation, the receiving module is configured to sequentially interact with a network node of each first cell; wherein interacting with a first cell once includes:

[0110] a sending module, configured to send a random access preamble and / or a random access procedure index to a network node of the first cell based on a first sending resource or a first sending window corresponding to the first cell; and

[0111] A receiving module is used to receive a first message corresponding to the first cell sent by a network node of the first cell based on a first receiving resource or a first sending window corresponding to the first cell, or, when the first cell is the non-service cell, to receive a first message corresponding to the first cell sent by a network node of the service cell.

[0112] In an optional implementation, the network node of the serving cell and the network node of the non-serving cell are the same as or different from each other.

[0113] In an optional implementation, the distributed unit DU controlled by the network node of the non-serving cell is configured to provide one or more of the following information:

[0114] The TA of the non-serving cell;

[0115] An index of the random access preamble of the non-serving cell;

[0116] Random access opportunity RO information;

[0117] The relevant index of the non-serving cell;

[0118] The index of the DU;

[0119] The index of the centralized unit CU corresponding to the DU;

[0120] The TAT of the non-serving cell.

[0121] In a fourth aspect, an embodiment of the present application provides a communication device, the device comprising:

[0122] A sending module is used to send at least one first message, wherein the at least one first message includes TA-related information of at least one first cell, the at least one first message includes TA-related information of at least one first cell, the TA-related information includes TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0123] In an optional implementation, the at least one first message further includes one or more of:

[0124] at least one timing advance timer TAT;

[0125] Process end indication;

[0126] at least one random access preamble;

[0127] an index of at least one random access preamble;

[0128] At least one random access procedure index;

[0129] At least one cell-related identifier.

[0130] In an optional implementation, the sending module is located in the network node of the first cell. When the network side device includes the network node of the first cell, the network node of the first cell sends the first message corresponding to the first cell to the terminal; or,

[0131] The sending module is located in a network node of a serving cell. When the network-side device includes the network node of the serving cell, the network node of the serving cell sends the at least one first message to the terminal.

[0132] In an optional embodiment, the device also includes a receiving module, which is located in a network node of the first cell; the network side device includes a network node of the first cell, and the network node of the first cell receives the random access preamble code and / or random access process index sent by the terminal.

[0133] In an optional implementation, the sending module is located in the network node of the serving cell. When the network side device includes the network node of the serving cell, the network node of the serving cell sends configuration information to the terminal, and the configuration information is used by the terminal to initiate at least one random access process.

[0134] In an optional implementation, the configuration information includes one or more of the following:

[0135] a first transmission resource corresponding to each first cell;

[0136] at least one first sending window;

[0137] a first receiving resource corresponding to each first cell;

[0138] at least one first receiving window;

[0139] Dedicated receiving window;

[0140] The number of random access procedures initiated.

[0141] In a fifth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory;

[0142] The memory stores computer-executable instructions;

[0143] The processor executes the computer-executable instructions stored in the memory, so that the electronic device executes the method described in the first aspect or any possible implementation of the first aspect, and / or executes the method described in the second aspect or any possible implementation of the second aspect.

[0144] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction runs on a processor, the processor executes the method described in the first aspect or any possible implementation of the first aspect, and / or executes the method described in the second aspect or any possible implementation of the second aspect.

[0145] In the seventh aspect, an embodiment of the present application provides a computer program product including a computer program. When the computer program is run on a computer, it enables the computer to execute the method described in the first aspect or any possible implementation of the first aspect, and / or execute the method described in the second aspect or any possible implementation of the second aspect.

[0146] In an eighth aspect, 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 possible implementation of the first aspect, and / or execute the method described in the second aspect or any possible implementation of the second aspect. The communication interface in the chip can be an input / output interface, a pin, or a circuit, etc.

[0147] In one possible implementation, the chip or chip system described above in this 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.).

[0148] It should be understood that the second to eighth 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 implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0149] Figure 1 This is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0150] Figure 2 This is a schematic diagram of a first method for obtaining TA-related information of each first cell provided in an embodiment of the present application;

[0151] Figure 3 This is a schematic diagram of a second method for obtaining TA-related information of each first cell provided in an embodiment of the present application;

[0152] Figure 4This is a schematic diagram of a third method for obtaining TA-related information of each first cell provided in an embodiment of the present application;

[0153] Figure 5 This is a flow chart of a method for obtaining a timing advance according to an embodiment of the present application;

[0154] Figure 6 This is a second flow chart of a method for obtaining a timing advance value provided in an embodiment of the present application;

[0155] Figure 7 Flowchart 3 of the method for obtaining timing advance provided in an embodiment of the present application;

[0156] Figure 8 Flowchart 4 of the method for obtaining timing advance provided in an embodiment of the present application;

[0157] Figure 9 Flowchart 5 of the method for obtaining timing advance provided in an embodiment of the present application;

[0158] Figure 10 Flowchart 6 of the method for obtaining timing advance provided in an embodiment of the present application;

[0159] Figure 11 This is one of the structural diagrams of the communication device provided in the embodiment of the present application;

[0160] Figure 12 The second structural diagram of the communication device provided in the embodiment of the present application;

[0161] Figure 13 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0162] Words such as "exemplary" or "for example" are used to indicate examples, illustrations, or illustrations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as 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.

[0163] "At least one" means one or more, and "more" means 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 mean: A exists alone, A and B exist at the same time, and B exists 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 or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, a--c, bc, or abc, where a, b, c can be single or plural.

[0164] The terms "first" and "second" are used to distinguish 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 the terms "first" and "second" do not define the quantity or order of execution, and do not necessarily imply differences.

[0165] In the embodiments of the present application, the phrases "when (at) ...", "when (in) the case of ...", or "if ..." 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 can also include more or less content.

[0166] To facilitate a clear description of the technical solutions of the embodiments of the present application, some of the terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0167] A cell, also known as a cellular cell, refers to an area covered by a base station or a part of a base station (sector antenna) in a cellular mobile communication system. Within this area, a terminal can communicate reliably with the base station through a wireless channel.

[0168] The serving cell is the cell that currently provides communication services to the terminal.

[0169] A non-serving cell is a cell that currently does not provide communication services to the terminal.

[0170] The random access procedure (RACH procedure) is the first step for a terminal to access the network. The RACH procedure is the process by which a terminal performs uplink synchronization and establishes a radio resource control (RRC) connection based on the radio status.

[0171] Distributed Unit (DU) is used in the base station to process physical layer protocols and real-time services.

[0172] Centralized Unit (CU) is used in the base station to process non-real-time protocols and services. A CU can control at least one DU.

[0173] A network node can be understood as a base station or a CU in a base station.

[0174] In common CU communication, multiple base stations communicate through the same CU. Each base station includes at least one DU, which communicates with the same CU. For base stations A and B, DU 1 in base station A communicates with the same CU (for example, CU 1), and DU 2 in base station B communicates with the same CU. The relationship is: DU 1 = CU 1 = DU 2.

[0175] In cross-CU communication, multiple base stations communicate through different CUs. For each base station, the DU in that base station communicates with the CU in that base station. For base stations A and B, DU 1 in base station A communicates with CU 1 in that base station, and DU 2 in base station B communicates with CU 2 in that base station. In this way, CU 1 and CU 2 communicate, i.e., DU 1 => CU 1 and CU 2 => DU 2.

[0176] Timing Advance (TA) is the offset between the start time of receiving a downlink subframe at a terminal and the time of transmitting an uplink subframe.

[0177] The Time Alignment Timer (TAT) indicates the validity period of the TA. When the TAT expires, the TA is released.

[0178] The random access preamble (64 bits) is used to identify the terminal during random access. It is the actual content transmitted by the terminal on the physical random access channel. The random access preamble consists of a cyclic prefix (CP) and a sequence. In LTE systems, the transmitter processes the random access preamble in two ways: full frequency domain and hybrid time-frequency domain.

[0179] Terminal can also be called 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 equipment, user agent, user device, etc. For example, the wireless communication device may include a mobile phone, a tablet computer, a PDA, a laptop computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a future-evolved public land mobile communication network. The embodiments of the present application are not limited to terminal devices in a public network (PLMN), etc. For example, it can also be a wearable device. Wearable devices can also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear. Examples of wearable devices are smart glasses, smart gloves, smart watches, smart clothing, and smart shoes. For example, it can also be a terminal device in an Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

[0180] A base station (BS), also known as a base station device, is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, the device that provides base station functions in a 2G network includes a base transceiver station (BTS), the device that provides base station functions in a 3G network includes a device B (NodeB), the device that provides base station functions in a 4G network includes an evolved device B (eNB), and in wireless local area networks (WLAN), the device that provides base station functions is an access point (AP), the device that provides base station functions in 5G New Radio (NR) is a gNB, and the device that continues to evolve is a B (ng-eNB), wherein the gNB and the terminal communicate using NR technology, and the ng-eNB and the terminal communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology, and both gNB and ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes a device that provides base station functions in a new communication system in the future.

[0181] In an embodiment of the present application, a terminal or base station may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also known as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software.

[0182] In L1 / L2-triggered mobility (LTM), a terminal initiates RACH procedures to multiple cells. When initiating RACH procedures to multiple cells, how the terminal obtains the TAs of the multiple cells to reduce the terminal's access latency has become a pressing technical issue.

[0183] In order to solve the above problems, an embodiment of the present application provides a method for obtaining a timing advance. In this method, a terminal can receive at least one first message, and the at least one first message includes TA-related information of at least one first cell, so that the terminal can obtain the TA of multiple first cells and reduce the access delay of the terminal.

[0184] First combine Figure 1 The present invention provides an application scenario description of the method for obtaining the timing advance provided in the embodiment of the present application.

[0185] Figure 1 This is a schematic diagram of the application scenario provided by the embodiment of this application. Figure 1 As shown, it includes: a terminal and a network side device. The network side device includes, for example, a plurality of network nodes of the first cell. The plurality of first cells include, for example, a serving cell and at least one non-serving cell. It should be noted that, Figure 1 The following description is given using two non-service cells as an example.

[0186] The terminal may communicate with the network node of each first cell respectively to obtain TA-related information of each first cell. The TA-related information may include a TA and / or a TA group identifier.

[0187] In the application embodiment, the network node can be understood as a base station, or a CU in the base station. In the case where the network node is understood as a CU, the communication between the terminal and the CU is achieved through the DU controlled by the CU.

[0188] The following takes multiple first cells including serving cells and non-serving cells as an example: Figure 2 、 Figure 3 and Figure 4 , describes the method for obtaining TA-related information of each first cell.

[0189] Figure 2 This is a schematic diagram of the first method of obtaining TA-related information of each first cell provided by the embodiment of the present application. Figure 2 As shown, it includes: a terminal, a network node of a serving cell and two network nodes of non-serving cells.

[0190] The terminal communicates with three network nodes, and can obtain three first messages sent by the three network nodes. One first message sent by one network node includes TA-related information of a first cell corresponding to the network node.

[0191] Figure 3 1 is a schematic diagram of a second method of obtaining TA-related information of each first cell provided in an embodiment of the present application. Figure 3 As shown, it includes: a terminal, a network node of a serving cell and two network nodes of non-serving cells.

[0192] The terminal communicates with three network nodes, and obtains three first messages sent by the network node of the serving cell, where one first message includes TA-related information of a first cell corresponding to the network node.

[0193] Figure 4 This is a schematic diagram of a third method of obtaining TA-related information of each first cell provided by an embodiment of the present application. Figure 4 As shown, it includes: a terminal, a network node of a serving cell and two network nodes of non-serving cells.

[0194] The terminal communicates with three network nodes, and obtains one first message sent by the network node of the serving cell. The one first message includes TA-related information of the three first cells.

[0195] The technical solutions presented in this application are described in detail below through specific embodiments. It should be noted that the following embodiments may exist independently or in combination with one another. The following embodiments are described with one auxiliary positioning device. For identical or similar content, such as explanations of terms or nouns, and explanations of steps, references may be made to each other in different embodiments and will not be repeated.

[0196] Figure 5 This is one of the flow charts of the method for obtaining the timing advance provided in the embodiment of the present application. Figure 5 As shown, the method includes:

[0197] S501. The network side device sends at least one first message to the terminal. The at least one first message includes TA-related information of at least one first cell. The TA-related information includes a TA and / or TA group identifier. The at least one first cell includes a serving cell and / or a non-serving cell.

[0198] The network device may be a network node including each first cell.

[0199] Optionally, the first message may be a Random Access Response (RAR) or a Medium Access Control Element (MAC CE).

[0200] The following takes the number of at least one first cell being 3 as an example to illustrate the relationship between the first message and TA-related information.

[0201] For example, in Figure 2 and 3 On the basis of this, the network side device sends three first messages, and one first message includes TA related information of one first cell.

[0202] For example, in Figure 4 On the basis of this, the network side device sends one first message, and the one first message includes TA related information of three first cells.

[0203] Furthermore, after the terminal receives the at least one first message, TA-related information of the at least one first cell may be obtained from the at least one first message.

[0204] Based on the above embodiment, the terminal receives at least one first message, which includes TA-related information of at least one first cell, and the TA-related information includes TA and / or TA group identifier, so that the terminal can obtain the TA of multiple first cells and reduce the access delay of the terminal.

[0205] In some optional implementations, the at least one first message further includes one or more of:

[0206] at least one timing advance timer TAT;

[0207] Process end indication;

[0208] at least one random access preamble;

[0209] an index of at least one random access preamble;

[0210] At least one random access procedure index;

[0211] At least one cell-related identifier.

[0212] The following describes a method for the terminal to determine TA-related information of each first cell after receiving the at least one first message in combination with some situations of the at least one first message.

[0213] (01) Based on Figure 2 and 3 , the multiple first messages also include multiple cell-related identifiers, and the multiple cell-related identifiers correspond to multiple first cells

[0214] For each first message, based on the cell-related identifier, the first cell corresponding to the first message is determined, and the TA-related information in the first message is determined as the TA-related information of the first cell.

[0215] (02) Based on Figure 4 , a first message also includes a correspondence between multiple cell-related identifiers and TA-related information of multiple first cells

[0216] For each cell-related identifier, a first cell corresponding to the cell-related identifier is determined; and according to the corresponding relationship, TA-related information corresponding to the cell-related identifier is determined as TA-related information of the first cell.

[0217] Optionally, when the TA-related information of the first cell includes a TA group identifier, the TA of the first cell can be determined based on the corresponding relationship represented by multiple TAs and multiple TA groups (Timing Advance Group, TAG). Specifically, the TAG group of the first cell is determined, and the TA corresponding to the TAG group identifier is determined as the TA of the first cell. The TA corresponding to the TA group identifier in the TA-related information in the corresponding relationship is determined as the TA of the first cell. The corresponding relationship between multiple TAs and multiple TA group identifiers can be pre-configured in the terminal or provided by the network. The corresponding relationship between multiple TAs and multiple TA group identifiers can exist in the form of a list or a set. For example, when it exists in the form of a list, as shown in Table 1 below.

[0218] Table 1

[0219] TA 1 TA group ID 1 TA 2 TA group ID 2 TA 3 TA group ID 3 …… ……

[0220] For example, when it exists in a set form, it is {TA 1, TA group identifier 1, TA 2, TA group identifier 2, TA 3, TA group identifier 3...}.

[0221] Based on the above embodiments, the following takes three first cells including a service cell (for example, an S-Cell) and two non-service cells (for example, including C-Cell 1 and C-Cell 2) as an example, and takes different application scenarios as an example to illustrate the method for obtaining the timing advance provided in this application.

[0222] First, combine the three first cells Figure 2 The application scenario shown in Figure 6 The method for obtaining the timing advance provided in the embodiment of the present application is described.

[0223] Figure 6 This is a second flow chart of the method for obtaining the timing advance provided in the embodiment of the present application. Figure 6 As shown, the method includes:

[0224] S601. The network node (e.g., S-gNB) of the serving cell (e.g., S-Cell) sends configuration information to the terminal (e.g., UE).

[0225] In an optional embodiment, the configuration information includes one or more of the following: the first sending resource corresponding to each first cell, at least one first sending window, the first receiving resource corresponding to each first cell, at least one first receiving window, a dedicated receiving window, and the number of random access procedures initiated.

[0226] S602: The UE initiates at least one random access procedure according to the configuration information.

[0227] Specifically, it includes: the UE initiates a random access process to the S-gNB, the network node C-gNB 1 of C-Cell 1, and the network node C-gNB 2 of C-Cell 2 respectively.

[0228] Specifically, the UE initiating at least one random access procedure is described in combination with some situations of configuration information.

[0229] (11) The configuration information includes the first transmission resource corresponding to each first cell

[0230] The UE sends a random access preamble and / or a random access procedure index to the S-gNB based on the first transmission resource corresponding to the S-Cell; sends a random access preamble and / or a random access procedure index to C-gNB 1 based on the first transmission resource corresponding to C-Cell 1; and sends a random access preamble and / or a random access procedure index to C-gNB 2 based on the first transmission resource corresponding to C-Cell 2.

[0231] In an embodiment of the present application, the UE sends a random access preamble and / or a random access procedure index, indicating that the UE initiates a random access procedure.

[0232] (12) The configuration information includes a first sending window

[0233] Within the first sending window, the UE sends a random access preamble and / or a random access procedure index to the S-gNB, sends a random access preamble and / or a random access procedure index to C-gNB 1, and sends a random access preamble and / or a random access procedure index to C-gNB 2.

[0234] Optionally, in (12), the UE may send a random access preamble and / or a random access procedure index to the S-gNB within the first sending window, send a random access preamble and / or a random access procedure index to C-gNB 1, and send a random access preamble and / or a random access procedure index to C-gNB 2, thereby initiating a random access procedure.

[0235] (13) The configuration information includes at least one first sending window, and the at least one first sending window corresponds to at least one first cell

[0236] In the first sending window corresponding to the S-Cell, the UE sends a random access preamble and / or a random access procedure index to the S-gNB; in the first sending window corresponding to C-Cell 1, the UE sends a random access preamble and / or a random access procedure index to C-gNB 1; in the first sending window corresponding to C-Cell 2, the UE sends a random access preamble and / or a random access procedure index to C-gNB 2.

[0237] Optionally, in (13), the UE may also send a random access preamble and / or a random access procedure index to the S-gNB, send a random access preamble and / or a random access procedure index to C-gNB 1, and send a random access preamble and / or a random access procedure index to C-gNB 2, that is, initiate a random access procedure.

[0238] It should be noted that in (11)-(13), the UE can send random access preamble codes and / or random access process indexes to multiple network nodes (i.e., initiate multiple random access processes), which can improve the efficiency of the UE in obtaining the TA of multiple first cells and reduce the delay of the UE in obtaining the TA of at least one first cell.

[0239] (14) The configuration information includes the number M of random access procedures to be initiated, where M is an integer greater than and / or equal to 1.

[0240] During the first transmission process, the UE initiates M random access procedures (i.e., sends a random access preamble and / or a random access procedure index to each of the M first cells); during the second transmission process, the UE initiates M random access procedures again (i.e., sends a random access preamble and / or a random access procedure index to each of the M first cells). The M first cells in the first transmission process and the second transmission process may be completely the same, completely different, or partially the same. The method for the terminal to send a random access preamble and / or a random access procedure index to each first cell during a transmission process can be referred to (11)-(13), which will not be repeated here.

[0241] Optionally, in (11)-(14), when initiating the random access procedure, the random access preamble codes sent by the UE to each network node may be completely different, completely the same, or partially the same.

[0242] For example, when the random access preambles sent to each network node are completely different, the UE sends Preamble 1 to the S-gNB, Preamble 2 to C-gNB 1, and Preamble 3 to C-gNB 2.

[0243] For example, when the random access preambles sent to each network node are exactly the same, for example, the UE sends Preamble 1 to the S-gNB, sends Preamble 1 to C-gNB 1, and sends Preamble 1 to C-gNB 2.

[0244] For example, when the random access preamble code part sent to each network node is the same, for example, the UE sends Preamble 1 to the S-gNB, sends Preamble 2 to C-gNB 1, and sends Preamble 2 to C-gNB 2.

[0245] Optionally, when the random access preamble codes sent to each network node are completely different, the UE may not send a random access procedure index (index for short) to each network node, or may send a random access procedure index.

[0246] For example, when sending a random access procedure index, the same random access procedure index may be sent. For example, when the UE sends the same random access procedure index to each network node, the UE sends index 1 to the S-gNB, index 1 to C-gNB 1, and index 1 to C-gNB 2.

[0247] Optionally, when the random access preambles sent to each network node are completely identical or partially identical, the UE may send completely different random access procedure indexes or partially identical random access procedure indexes to the network nodes corresponding to the same random access preamble.

[0248] For example, when the random access preambles sent to each network node are exactly the same, for example, the UE sends index 1 (Preamble 1) to the S-gNB, index 2 (Preamble 1) to C-gNB 1, and index 3 (Preamble 1) to C-gNB 2.

[0249] For example, when the random access preamble portion sent to each network node is the same, for example, the UE sends index 1 (Preamble 1) to the S-gNB, index 1 (Preamble 2) to C-gNB 1, and index 2 (Preamble 2) to C-gNB 2.

[0250] In an embodiment of the present application, when initiating a random access procedure, the UE sends the same random access preamble to some or all of the multiple network nodes, which can save resources of the random access preamble.

[0251] After sending the random access preamble and / or the random access procedure index, the UE starts to receive at least one first message.

[0252] The following describes receiving at least one first message in conjunction with some situations of configuration information.

[0253] (21) The configuration information includes the first receiving resource corresponding to each first cell

[0254] After sending the random access preamble and / or the random access procedure index to the S-gNB, the UE receives the first message corresponding to the S-Cell sent by the S-gNB based on the first reception resource corresponding to the S-Cell;

[0255] After sending the random access preamble and / or the random access procedure index to C-gNB 1, receiving, based on the first receiving resource corresponding to C-Cell 1, a first message corresponding to C-Cell 1 sent by C-gNB 1;

[0256] After sending the random access preamble code and / or random access procedure index to C-gNB 2, based on the first receiving resource corresponding to C-Cell 2, receive the first message corresponding to C-Cell 1 sent by C-gNB 2.

[0257] (22) The configuration information includes a first receiving window

[0258] After sending the random access preamble and / or the random access procedure index to the S-gNB, the UE receives, within the first receiving window, the first message sent by the S-gNB, the first message corresponding to C-Cell 1 sent by C-gNB 1, and the first message corresponding to C-Cell 2 sent by C-gNB2.

[0259] After sending the random access preamble and / or the random access procedure index to C-gNB 1, receive, within the first receiving window, a first message corresponding to C-Cell 1 sent by C-gNB 1;

[0260] After sending the random access preamble code and / or random access procedure index to C-gNB 2, within the first receiving window, receive the first message corresponding to C-Cell 1 sent by C-gNB 2.

[0261] (23) The configuration information includes at least one first receiving window, and the at least one first receiving window corresponds to at least one first cell.

[0262] After sending the random access preamble and / or the random access procedure index to the S-gNB, the UE receives the first message corresponding to the S-Cell sent by the S-gNB within the first receiving window corresponding to the S-Cell;

[0263] After sending the random access preamble and / or the random access procedure index to C-gNB 1, receiving, within the first receiving window corresponding to C-Cell 1, a first message corresponding to C-Cell 1 sent by C-gNB 1;

[0264] After sending the random access preamble code and / or random access procedure index to C-gNB 2, within the first receiving window corresponding to C-Cell 2, receive the first message corresponding to C-Cell 2 sent by C-gNB 2.

[0265] In the process of receiving at least one first message, for each network node, the terminal starts to receive the first message corresponding to the first cell after sending the random access preamble code and / or the random access process index to the network node, without having to wait until the random access preamble code and / or the random access process index are sent to all network nodes before starting to receive. Therefore, the purpose of parallel reception of the terminal is achieved, and the efficiency of obtaining TA-related information of at least one first cell is improved.

[0266] S603. The S-gNB sends the first message corresponding to the S-Cell to the UE based on the received random access preamble code and / or random access procedure index.

[0267] Here, the first message includes one or more of the following: the TA and / or TA group identifier of the S-Cell, the random access preamble received by the S-Cell, the index of the random access preamble, the random access procedure index received by the S-Cell, the cell-related identifier of the S-Cell, and a procedure end indication. It should be noted that the procedure end indication is used to indicate the end of the TA acquisition procedure between the network node and the UE.

[0268] The TA of the S-Cell 1 is determined by the S-gNB based on the received random access preamble.

[0269] The following describes how to obtain the TA of the S-Cell in combination with some situations of the first message.

[0270] (31) The first message includes TA and random access preamble

[0271] The UE determines the first cell corresponding to the random access preamble in the first message based on the correspondence between multiple preconfigured random access preambles and multiple first cells. When the first cell is an S-Cell, the TA in the first message is determined as the TA of the S-Cell.

[0272] (32) The first message includes TA and random access procedure index

[0273] The UE determines the first cell corresponding to the random access procedure index in the first message based on the correspondence between multiple pre-configured random access procedure indices and multiple first cells. If the first cell is an S-Cell, the TA in the first message is determined as the TA of the S-Cell.

[0274] (33) The first message includes the TA and cell-related identifier

[0275] When the cell-related identifier is the identifier of the S-Cell, the UE determines the TA in the first message as the TA of the S-Cell.

[0276] Optionally, the cell-related identifier may include one or more of the following: a cell unique identifier (Cell ID), a low-layer triggered mobility (L1 / L2-triggered mobility, LTM) configuration identifier, and a physical cell identifier (Physical Cell Identifier, PCI). The LTM configuration identifier may also be called an LTM candidate configuration identity.

[0277] S604. C-gNB 1 sends the first message corresponding to C-Cell 1 to the UE based on the received random access preamble code and / or random access process index.

[0278] Specifically, the first message in S604 is similar to the first message in S603, and the execution method of S604 is similar to the execution method of S603, so the execution process of S604 is not repeated here.

[0279] S605. C-gNB 2 sends the first message corresponding to C-Cell 2 to the UE based on the received random access preamble code and / or random access process index.

[0280] Specifically, the first message in S605 is similar to the first message in S603. The execution method of S605 is detailed in the execution method of S603, and the execution process of S605 is not repeated here.

[0281] Next, combine Figure 3 The application scenario shown in Figure 7 , the method for obtaining the timing advance provided in the embodiment of the present application is described.

[0282] Figure 7 This is a flow chart of the third method for obtaining the timing advance provided in the embodiment of the present application. Figure 7 As shown, the method includes:

[0283] S701. The S-gNB of the S-Cell sends configuration information to the UE.

[0284] S702. The UE initiates at least one random access procedure according to the configuration information.

[0285] S703. The S-gNB sends the first message corresponding to the S-Cell to the terminal according to the received random access preamble code and / or random access procedure index.

[0286] Specifically, the execution method of S701-S703 is the same as the execution method of S601-S603, and the execution process of S701-S703 is not repeated here.

[0287] S704. C-gNB 1 sends TA-related information of C-Cell 1 to S-gNB based on the received random access preamble code and / or random access procedure index.

[0288] The TA-related information of C-Cell 1 includes: the TA and / or TA group identifier of C-Cell 1.

[0289] When the TA-related information of C-Cell 1 includes a TA group identifier, C-gNB 1 can determine the TA of C-Cell 1 based on the received random access preamble code, and determine the identifier corresponding to the TA as the TA group identifier.

[0290] Optionally, C-gNB 1 may also provide one or more of the following to S-gNB: the cell-related identifier of C-Cell 1, the TAT of C-Cell 1, the random access preamble received by C-Cell 1, the index of the random access preamble, and the random access procedure index received by C-Cell 1.

[0291] S705. The S-gNB sends a first message corresponding to C-Cell 1 to the terminal based on the TA-related information of C-Cell 1.

[0292] Optionally, the S-gNB sends the first message corresponding to C-Cell 1 to the terminal based on the TA-related information of C-Cell 1, the cell-related identifier of C-Cell 1, the TAT of C-Cell 1, the random access preamble received by C-Cell 1, the index of the random access preamble and the random access process index received by C-Cell 1.

[0293] Among them, the first message corresponding to C-Cell 1 may include one or more of the following: the cell-related identifier of C-Cell 1, the TA and / or TA group identifier of C-Cell 1, the TAT of C-Cell 1, the random access preamble code received by C-Cell 1, the index of the random access preamble code, the random access process index received by C-Cell 1, and the process end indication.

[0294] Specifically, the terminal may determine to obtain the TA of C-Cell 1 based on the method for obtaining the TA of the S-Cell in S603.

[0295] S706. C-gNB 2 sends TA-related information of C-Cell 2 to S-gNB based on the received random access preamble code and / or random access procedure index.

[0296] S707. The S-gNB sends a first message corresponding to C-Cell 2 to the terminal according to the TA-related information of C-Cell 2.

[0297] The type of information included in the first message corresponding to C-Cell 2 is the same as the type of information included in the first message corresponding to C-Cell 1 in S705, and is not repeated here. For example, the first message corresponding to C-Cell 1 in S705 also includes the cell-related identifier of C-Cell 1, and the first message corresponding to C-Cell 2 also includes the cell-related identifier of C-Cell 2.

[0298] Specifically, the execution method of S706-S707 is similar to the execution method of S704-S705, and the execution process of S706-S707 is not repeated here.

[0299] exist Figure 6 and Figure 7 In an embodiment, the terminal may establish multiple media access control (MAC) entities. For each established MAC entity, the UE initiates a random access procedure and increments a counter by 1. When the UE receives TA-related information for a first cell, the counter is decremented by 1. When the counter reaches 0, it is considered that the TA-related information for all first cells has been obtained.

[0300] It should be noted that C-gNB 1DU and C-gNB 2DU (in Figure 6 and Figure 7 (in) can be the same. Figure 6 In the case where C-gNB 1DU and C-gNB 2DU are the same, the first message corresponding to C-Cell 1 and the first message corresponding to C-Cell 2 are sent through the same DU.

[0301] exist Figure 7 In the case where C-gNB 1DU and C-gNB 2DU are the same, the TA-related information of C-Cell 1 and the TA-related information of C-Cell 2 are sent through the same DU.

[0302] Progress one place, combined Figure 4 The application scenario shown in Figure 8 , the method for obtaining the timing advance provided in the embodiment of the present application is described.

[0303] Figure 8 This is a fourth flow chart of the method for obtaining the timing advance provided in the embodiment of the present application. Figure 8 As shown, the method includes:

[0304] S801. The S-gNB of the S-Cell sends configuration information to the UE.

[0305] S802. The UE initiates at least one random access procedure according to the configuration information.

[0306] Specifically, the execution method of S802 is the same as the execution method of S602, and the execution process of S802 is not repeated here.

[0307] S803. C-gNB 1 sends TA-related information of C-Cell 1 to S-gNB based on the received random access preamble.

[0308] Specifically, the execution method of S803 and S704 is the same, and the execution process of S803 is not repeated here.

[0309] S804. C-gNB 2 sends TA-related information of C-Cell 2 to S-gNB based on the received random access preamble code.

[0310] Specifically, the execution methods of S804 and S704 are detailed, and the execution process of S804 will not be repeated here.

[0311] S805. The S-gNB sends a first message to the UE based on the TA-related information of the S-Cell, the TA-related information of C-Cell 1, and the TA-related information of C-Cell 2.

[0312] Optionally, the UE receives the first message sent by the S-gNB within a dedicated receiving window. The dedicated receiving window may also be a first receiving port or a specific receiving window.

[0313] Optionally, the first message includes one or more of the following:

[0314] TA-related information for each of S-Cell, C-Cell 1, and C-Cell 2;

[0315] TAT of each of S-Cell, C-Cell 1, and C-Cell 2;

[0316] Process end indication;

[0317] Random access preambles received by S-Cell, C-Cell 1, and C-Cell 2, respectively;

[0318] The index of the random access preamble code received by S-Cell, C-Cell 1 and C-Cell 2 respectively;

[0319] Random access procedure indexes received by S-Cell, C-Cell 1, and C-Cell 2 respectively;

[0320] Cell-related identifiers of S-Cell, C-Cell 1, and C-Cell 2.

[0321] For example, the information in the first message may exist in the form of a list as shown in Table 2.

[0322] Table 2

[0323] S-Cell cell-related identifier TA related information 1 TAT 1 Random access preamble 1 C-Cell 1 cell-related identifier TA related information 2 TAT 2 Random access preamble 2 C-Cell 1 cell-related identifier TA related information 3 TAT 3 Random access preamble 3

[0324] exist Figure 8 In the method provided in the embodiment, a first message received by the terminal includes TA-related information of at least one first cell, so that TA-related information of at least one first cell can be obtained through one first message without waiting for multiple first messages, thereby reducing the delay in obtaining TA-related information of at least one first cell and saving signaling overhead between the network side and the terminal.

[0325] In addition, combined Figure 2 The application scenario shown in Figure 9 , the method for obtaining the timing advance provided in the embodiment of the present application is described.

[0326] Figure 9 This is a flowchart of the method for obtaining the timing advance provided in the embodiment of the present application. Figure 9 As shown, the method includes:

[0327] S901. The S-gNB of the S-Cell sends configuration information to the UE.

[0328] Specifically, the execution method of S901 is the same as the execution method of S601, and the execution process of S901 is not repeated here.

[0329] S902. The UE initiates a random access procedure to the S-gNB according to the configuration information.

[0330] Specifically, the execution method of S902 can refer to the method in which the terminal initiates a random access process to the S-gNB in S602, which is not repeated here.

[0331] S903. The S-gNB sends the first message corresponding to the S-Cell to the UE according to the received random access preamble code and / or random access procedure index.

[0332] Specifically, the execution process of S903 can refer to the execution process of S603, which will not be repeated here.

[0333] S904. The UE initiates a random access procedure to C-gNB 1 according to the configuration information (sends a random access preamble and / or a random access procedure index to C-gNB 1).

[0334] Specifically, the execution method of S904 can refer to the method in which the terminal initiates a random access process to C-gNB 1 in S602, which will not be repeated here.

[0335] S905. C-gNB 1 sends the first message corresponding to C-Cell 1 to the UE based on the received random access preamble code and / or random access procedure index.

[0336] S906. The UE initiates a random access procedure to C-gNB 2 based on the configuration information.

[0337] Specifically, the execution method of S904 can refer to the method in which the terminal initiates a random access process to C-gNB 1 in S602, which will not be repeated here.

[0338] S907. C-gNB 2 sends the first message corresponding to C-Cell 2 to the UE based on the received random access preamble code and / or random access process index.

[0339] Specifically, the execution method of S904-S905 and the execution method of S906-S907 are similar to the execution method of S902-S903, and will not be repeated here.

[0340] Furthermore, combined Figure 3 The application scenario shown in Figure 10 , the method for obtaining the timing advance provided in the embodiment of the present application is described.

[0341] Figure 10 This is a flowchart of the method for obtaining the timing advance provided in the embodiment of the present application. Figure 10 As shown, the method includes:

[0342] S1001. The S-gNB of the S-Cell sends configuration information to the UE.

[0343] Specifically, the execution method of S1001 is the same as the execution method of S601, and the execution process of S1001 is not repeated here.

[0344] S1002. The UE initiates a random access procedure to the S-gNB according to the configuration information.

[0345] Specifically, the execution method of S1002 can refer to the method in which the terminal initiates a random access process to the S-gNB in S602, which is not repeated here.

[0346] S1003. The S-gNB sends the first message corresponding to the S-Cell to the UE according to the received random access preamble code and / or random access procedure index.

[0347] Specifically, the execution method of S1003 can refer to the execution method of S603, which will not be repeated here.

[0348] Optionally, the first message corresponding to the S-Cell may also include access-related configuration.

[0349] The access-related configuration may include one or more of the following:

[0350] Uplink (UL uplink, UL) indication;

[0351] Supplementary uplink (SUL) indication;

[0352] The index of the synchronization signal block;

[0353] The index of the Physical Random Access Channel (PRACH) mask.

[0354] Optionally, when the first message corresponding to the S-Cell includes TAT, the TA and random access configuration of the S-Cell may be released when the TAT times out. The start time of the TAT may be the moment when the UE receives the first message corresponding to the S-Cell.

[0355] S1004. The UE initiates a random access procedure to C-gNB 1 based on the configuration information.

[0356] S1005. C-gNB 1 sends TA-related information of C-Cell 1 to S-gNB based on the received random access preamble code.

[0357] Specifically, the execution method of S1005 is the same as that of S704 and will not be described in detail here.

[0358] S1006. The S-gNB sends the first message corresponding to C-Cell 1 to the UE based on the TA related information of C-Cell 1.

[0359] Specifically, the execution method of S1006 is the same as that of S705 and will not be described again here.

[0360] Optionally, the first message corresponding to C-Cell 1 may also include access-related configuration.

[0361] The access-related configuration in the first message corresponding to C-Cell 1 is similar to the information type included in the first message corresponding to S-Cell, and will not be repeated here.

[0362] Optionally, when TAT is included in the first message corresponding to C-Cell 1, the TA and random access configuration of C-Cell 1 may be released when TAT times out. The starting time of TAT may be the time when the UE receives the first message corresponding to C-Cell 1.

[0363] In the communication method shown in any of the above embodiments, the network node of the serving cell and the network node of the non-serving cell are the same or different.

[0364] The network nodes of the serving cell and the non-serving cell are the same, indicating communication with the same CU. For example, information about C-Cell 1 sent from C-gNB1 to the S-gNB passes through the distributed unit (DU) of C-gNB 1, the same CU, and the DU of the S-gNB. This means that the network nodes are C-gNB 1-DU => CU => S-gNB-DU.

[0365] The network nodes of the serving cell and the non-serving cell are different, indicating inter-CU communication. For example, the TA-related information of C-Cell 1 sent by C-gNB 1 to the S-gNB passes through C-gNB 1's DU, C-gNB 1's CU, S-gNB's CU, and S-gNB's DU in this order. That is, C-gNB 1-DU => C-gNB 1-CU => S-gNB-CU => S-gNB-DU.

[0366] In one possible embodiment, the DU controlled by the network node of the non-serving cell is used to provide one or more of the following information:

[0367] TA of non-serving cell;

[0368] The index of the random access preamble of the non-serving cell;

[0369] Random access opportunity (RACH Occasion, RO) information;

[0370] Related indexes of non-serving cells;

[0371] DU index;

[0372] The index of the centralized unit CU corresponding to the DU;

[0373] TAT of non-serving cells.

[0374] In intra-CU communication, the CU corresponding to the DU is the same CU. The DU provides one or more of the above information to the same CU. In inter-CU communication, the CU corresponding to the DU is a network node of a non-serving cell (i.e., a CU of a non-serving cell). The DU provides one or more of the above information to the CU of a non-serving cell.

[0375] The RO information may be, for example, a Radio Access Network Temporary Identifier (RA-RNTI) and time-frequency resources. The RO information is used to determine the time domain resources and / or frequency domain resources for the terminal to send a random access preamble.

[0376] The DU index and the CU index may be used by a network node of a serving cell to identify a terminal.

[0377] Figure 11 This is one of the structural diagrams of the communication device provided in the embodiment of the present application. Figure 11 As shown, the communication device 11 includes:

[0378] The receiving module 1101 is used to receive at least one first message, where the at least one first message includes timing advance TA-related information of at least one first cell, where the TA-related information includes a TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0379] The communication device provided in this embodiment can execute the method steps executed by the terminal in the above method embodiment. Its implementation principles and beneficial effects are similar and will not be described in detail here.

[0380] In an optional implementation, the at least one first message further includes one or more of:

[0381] at least one timing advance timer TAT;

[0382] Process end indication;

[0383] at least one random access preamble;

[0384] an index of at least one random access preamble;

[0385] At least one random access procedure index;

[0386] At least one cell-related identifier.

[0387] In an optional implementation manner, the at least one first message is a message received by initiating at least one random access procedure according to configuration information.

[0388] In an optional implementation, the configuration information includes one or more of the following:

[0389] a first transmission resource corresponding to each first cell;

[0390] at least one first sending window;

[0391] a first receiving resource corresponding to each first cell;

[0392] at least one first receiving window;

[0393] Dedicated receiving window;

[0394] The number of random access procedures initiated.

[0395] In an optional implementation, the configuration information includes a first transmission resource corresponding to each first cell; the receiving module 1101 is specifically configured to:

[0396] For each first cell, a first message corresponding to the first cell is received based on a first receiving resource corresponding to the first cell.

[0397] In an optional implementation, the configuration information includes the at least one first sending window, and the at least one first receiving window corresponds to the at least one first cell; the receiving module 1101 is specifically configured to:

[0398] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0399] In an optional implementation, the configuration information includes one first sending window, and one first receiving window corresponds to the at least one first cell; the receiving module 1101 is specifically configured to:

[0400] For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

[0401] In an optional implementation manner, the receiving module 1101 is specifically configured to:

[0402] receiving a first message corresponding to the first cell sent by a network node of the first cell; or,

[0403] The first cell is the non-serving cell, and receives a first message corresponding to the first cell sent by a network node of the serving cell.

[0404] In an optional implementation, the configuration information includes the dedicated receiving window; the receiving module 1101 is specifically configured to:

[0405] A first message sent by a network node of a serving cell is received within the dedicated receiving window.

[0406] In an optional implementation, the configuration information includes a first transmission resource corresponding to each first cell, and the apparatus further includes:

[0407] The sending module is configured to send a random access preamble code and / or a random access procedure index to each first cell based on a first sending resource corresponding to the first cell.

[0408] In an optional implementation, the configuration information includes the at least one first sending window, where the at least one first sending window corresponds to the at least one first cell; and the sending module is specifically configured to:

[0409] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell in a first sending window of the first cell.

[0410] In an optional implementation, the configuration information includes a first sending window, where the first sending window corresponds to the at least one first cell; and the sending module is specifically configured to:

[0411] For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell within the first sending window.

[0412] In an optional implementation, the receiving module 1101 is configured to sequentially interact with a network node of each first cell; wherein interacting with one first cell once includes:

[0413] a sending module, configured to send a random access preamble and / or a random access procedure index to a network node of the first cell based on a first sending resource or a first sending window corresponding to the first cell; and

[0414] The receiving module 1101 is used to receive the first message corresponding to the first cell sent by the network node of the first cell based on the first receiving resource or the first sending window corresponding to the first cell, or, when the first cell is the non-service cell, to receive the first message corresponding to the first cell sent by the network node of the service cell.

[0415] In an optional implementation, the network node of the serving cell and the network node of the non-serving cell are the same as or different from each other.

[0416] In an optional implementation, the distributed unit DU controlled by the network node of the non-serving cell is configured to provide one or more of the following information:

[0417] The TA of the non-serving cell;

[0418] An index of the random access preamble of the non-serving cell;

[0419] Random access opportunity RO information;

[0420] The relevant index of the non-serving cell;

[0421] The index of the DU;

[0422] The index of the centralized unit CU corresponding to the DU;

[0423] The TAT of the non-serving cell.

[0424] The communication device provided in this embodiment can execute the method steps executed by the terminal in the above method embodiment. Its implementation principles and beneficial effects are similar and will not be described in detail here.

[0425] Figure 12 This is the second structural diagram of the communication device provided in the embodiment of the present application. Figure 12 As shown, the communication device 12 includes:

[0426] The sending module 1201 is used to send at least one first message, wherein the at least one first message includes TA-related information of at least one first cell, the at least one first message includes TA-related information of at least one first cell, the TA-related information includes TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

[0427] The communication device provided in this embodiment can execute the method steps executed by the network-side device in the above method embodiment. Its implementation principles and beneficial effects are similar and will not be described in detail here.

[0428] In an optional implementation, the at least one first message further includes one or more of:

[0429] at least one timing advance timer TAT;

[0430] Process end indication;

[0431] at least one random access preamble;

[0432] an index of at least one random access preamble;

[0433] At least one random access procedure index;

[0434] At least one cell-related identifier.

[0435] In an optional implementation, the sending module 1201 is located in the network node of the first cell. When the network side device includes the network node of the first cell, the network node of the first cell sends the first message corresponding to the first cell to the terminal; or,

[0436] The sending module 1201 is located in the network node of the serving cell. When the network-side device includes the network node of the serving cell, the network node of the serving cell sends the at least one first message to the terminal.

[0437] In an optional embodiment, the device also includes a receiving module, which is located in a network node of the first cell; the network side device includes a network node of the first cell, and the network node of the first cell receives the random access preamble code and / or random access process index sent by the terminal.

[0438] In an optional implementation, the sending module 1201 is located in the network node of the serving cell. When the network side device includes the network node of the serving cell, the network node of the serving cell sends configuration information to the terminal, and the configuration information is used by the terminal to initiate at least one random access process.

[0439] In an optional implementation, the configuration information includes one or more of the following:

[0440] a first transmission resource corresponding to each first cell;

[0441] at least one first sending window;

[0442] a first receiving resource corresponding to each first cell;

[0443] at least one first receiving window;

[0444] Dedicated receiving window;

[0445] The number of random access procedures initiated.

[0446] The communication device provided in this embodiment can execute the method steps executed by the network-side device in the above method embodiment. Its implementation principles and beneficial effects are similar and will not be described in detail here.

[0447] Figure 13 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 13 As shown, electronic device 13 may include: memory 1301, processor 1302, and transceiver 1303. Transceiver 1303 may include: a transmitter and / or a receiver. The transmitter may also be referred to as a transmitter, transmitter, transmission port, transmission interface, or similar descriptions, and the receiver may also be referred to as a receiver, reception port, reception interface, or similar descriptions. Exemplarily, memory 1301, processor 1302, and transceiver 1303 are interconnected via bus 1304.

[0448] The memory 1301 is used to store computer-executable programs or instructions.

[0449] The processor 1302 is configured to execute the computer-executable program or instructions stored in the memory 1301, causing the electronic device to perform the method steps performed by the terminal and / or network-side device (or network node) in the above method embodiment. Its implementation principles and technical effects are similar to those of the above-mentioned related embodiments and are not further described here.

[0450] The present application provides a chip. The chip includes a processor configured to invoke a computer program stored in memory to execute the method steps performed by the terminal and / or network-side device (or network node) in the above-described method embodiments. The implementation principles and technical effects are similar to those of the above-described related embodiments and are not further described here.

[0451] The present application provides a chip system including at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is configured to execute a computer program or instruction to execute the method steps performed by the terminal and / or network-side device (or network node) in the above-mentioned method embodiment. The implementation principle and technical effects thereof are similar to those of the above-mentioned related embodiments and will not be further described here.

[0452] The embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by the processor, the method steps performed by the terminal and / or network-side device (or network node) in the above method embodiment are implemented. The method described in the above embodiment can be implemented in whole or in part by software, hardware, firmware or any combination thereof. If implemented in software, the function 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.

[0453] 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.

[0454] The present application provides a computer program product, which includes a computer program. When the computer program is executed on a computer, the computer executes the method steps performed by the terminal and / or network-side device (or network node) in the above-mentioned method embodiments. The implementation principles and technical effects thereof are similar to those of the above-mentioned related embodiments and are not further described here.

[0455] 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.

[0456] 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 in a terminal, the method includes: Receive at least one first message, wherein the at least one first message includes timing advance TA-related information of at least one first cell, the TA-related information includes a TA and / or TA group identifier, and 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 at least one first message further includes one or more items: at least one timing advance timer TAT; Process end indication; at least one random access preamble; an index of at least one random access preamble; At least one random access procedure index; At least one cell-related identifier.

3. The method according to claim 1 or 2, characterized in that The at least one first message is a message received by initiating at least one random access procedure according to configuration information.

4. The method according to claim 3, characterized in that The configuration information includes one or more of the following: a first transmission resource corresponding to each first cell; at least one first sending window; a first receiving resource corresponding to each first cell; at least one first receiving window; Dedicated receiving window; The number of random access procedures initiated.

5. The method according to claim 4, characterized in that The configuration information includes a first sending resource corresponding to each first cell; Receiving at least one first message, comprising: For each first cell, a first message corresponding to the first cell is received based on a first receiving resource corresponding to the first cell.

6. The method according to claim 4, characterized in that The configuration information includes the at least one first sending window, and the at least one first receiving window corresponds to the at least one first cell; Receiving at least one first message, comprising: For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

7. The method according to claim 4, characterized in that The configuration information includes a first sending window, and a first receiving window corresponds to the at least one first cell; receiving at least one first message includes: For each first cell, a first message corresponding to the first cell is received within a first receiving window corresponding to the first cell.

8. The method according to any one of claims 5 to 7, characterized in that: Receiving a first message corresponding to the first cell includes: receiving a first message corresponding to the first cell sent by a network node of the first cell; or, The first cell is the non-serving cell, and receives a first message corresponding to the first cell sent by a network node of the serving cell.

9. The method according to claim 4, characterized in that The configuration information includes the dedicated receiving window; receiving at least one first message includes: A first message sent by a network node of a serving cell is received within the dedicated receiving window.

10. The method according to any one of claims 4 to 9, characterized in that: The configuration information includes a first transmission resource corresponding to each first cell, and the method further includes: For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell based on the first sending resource corresponding to the first cell.

11. The method according to any one of claims 4 to 9, characterized in that: The configuration information includes the at least one first sending window, where the at least one first sending window corresponds to the at least one first cell. The method further includes: For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell in a first sending window of the first cell.

12. The method according to any one of claims 4 to 9, characterized in that: The configuration information includes a first sending window, where the first sending window corresponds to the at least one first cell; and the method further includes: For each first cell, a random access preamble code and / or a random access procedure index is sent to the first cell within the first sending window.

13. The method according to claim 4, characterized in that Receiving at least one first message includes: sequentially interacting with a network node of each first cell; The signal interaction with a first cell includes: Sending a random access preamble and / or a random access procedure index to a network node of the first cell based on a first sending resource or a first sending window corresponding to the first cell; and Based on the first receiving resource or the first sending window corresponding to the first cell, the first message corresponding to the first cell is received and sent by the network node of the first cell, or, when the first cell is the non-service cell, the first message corresponding to the first cell is received and sent by the network node of the service cell.

14. The method according to any one of claims 8, 9 or 13, characterized in that: The network node of the serving cell and the network node of the non-serving cell are the same as or different from each other.

15. The method according to claim 14, characterized in that The distributed unit DU controlled by the network node of the non-serving cell is configured to provide one or more of the following information: The TA of the non-serving cell; An index of the random access preamble of the non-serving cell; Random access opportunity RO information; The relevant index of the non-serving cell; The index of the DU; The index of the centralized unit CU corresponding to the DU; The TAT of the non-serving cell.

16. A method for obtaining a timing advance, characterized in that: Applied to a network-side device, the method includes: Send at least one first message, wherein the at least one first message includes TA-related information of at least one first cell, the at least one first message includes TA-related information of at least one first cell, the TA-related information includes TA and / or TA group identifier, and the at least one first cell includes a serving cell and / or a non-serving cell.

17. The method according to claim 16, characterized in that The at least one first message further includes one or more items: at least one timing advance timer TAT; Process end indication; at least one random access preamble; an index of at least one random access preamble; At least one random access procedure index; At least one cell-related identifier.

18. The method according to claim 16 or 17, characterized in that Sending at least one first message, including: When the network side device includes a network node of a first cell, the network node of the first cell sends a first message corresponding to the first cell to the terminal; or, When the network-side device includes a network node of the serving cell, the network node of the serving cell sends the at least one first message to the terminal.

19. The method according to any one of claims 16 to 18, characterized in that: The method further comprises: The network side device includes a network node of a first cell, and the network node of the first cell receives a random access preamble code and / or a random access procedure index sent by a terminal.

20. The method according to any one of claims 16 to 19, characterized in that: The method further comprises: When the network side device includes the network node of the serving cell, the network node of the serving cell sends configuration information to the terminal, where the configuration information is used by the terminal to initiate at least one random access procedure.

21. The method according to claim 20, characterized in that The configuration information includes one or more of the following: a first transmission resource corresponding to each first cell; at least one first sending window; a first receiving resource corresponding to each first cell; at least one first receiving window; Dedicated receiving window; The number of random access procedures initiated.

22. An electronic 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 electronic device performs the method according to any one of claims 1 to 21.

23. 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 21 is implemented.

24. A chip system, characterized in that: The system comprises at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is configured to run a computer program or instruction to execute the method according to any one of claims 1 to 21.

25. A computer program product, characterized in that The method comprises a computer program, which, when executed by a computer, causes the computer to perform the method according to any one of claims 1 to 21.

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