Wireless communication method, device and equipment

Abstract

The invention discloses a wireless communication method, device and equipment, and belongs to the technical field of communication, and the wireless communication method comprises the steps that a first network node sends a first message to a second network node; wherein the first message comprises at least one of the following items: a first identifier, and the first identifier is an identifier corresponding to a first logic connection allocated to the terminal by the second network node; the second identifier is an identifier corresponding to a second logic connection allocated to the terminal by a third network node; an identification of the third network node; an identifier of the terminal; an identifier of a serving cell of the terminal; wherein the first logic connection is the logic connection between the second network node and the third network node, and the second logic connection is the logic connection between the first network node and the third network node.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a wireless communication method, device and equipment. BACKGROUND

[0002] In a new radio (NR) system, L1 / L2-triggered mobility (LTM) across centralized units (CUs) is supported, and continuous inter-CU LTM is also supported. Specifically, for the continuous inter-CU LTM, how to establish a logical connection between at least two candidate CUs is a problem to be solved. SUMMARY

[0003] Embodiments of the present application provide a wireless communication method, device and equipment, which can solve the problem that, in the case that a terminal performs continuous inter-CU LTM, at least two candidate CUs do not know how to establish a logical connection.

[0004] In a first aspect, a wireless communication method is provided, comprising:

[0005] sending, by a first network node, a first message to a second network node;

[0006] The first message comprises at least one of the following:

[0007] a first identifier, the first identifier being an identifier corresponding to a first logical connection allocated by the second network node for a terminal;

[0008] a second identifier, the second identifier being an identifier corresponding to a second logical connection allocated by a third network node for the terminal;

[0009] an identifier of the third network node;

[0010] an identifier of the terminal;

[0011] an identifier of a serving cell of the terminal;

[0012] The first logical connection is a logical connection between the second network node and the third network node, and the second logical connection is a logical connection between the first network node and the third network node.

[0013] In a second aspect, a wireless communication method is provided, comprising:

[0014] receiving, by a second network node, a first message from a first network node;

[0015] The first message includes at least one of the following:

[0016] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0017] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0018] The identifier of the third network node;

[0019] The identifier of the terminal;

[0020] The identifier of the serving cell of the terminal;

[0021] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

[0022] Thirdly, a wireless communication method is provided, including:

[0023] The third network node sends a third message to the first network node;

[0024] The third message includes at least one of the following:

[0025] The first instruction information is used to instruct the first network node and the second network node to establish a logical connection;

[0026] The second indication information is used to indicate that the second network node is a candidate target network node;

[0027] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0028] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the third network node.

[0029] Fourthly, a wireless communication method is provided, comprising:

[0030] The fourth network node sends a fifth message to the fifth network node;

[0031] The fifth message includes one of the following: first information, second information;

[0032] The first information includes one of the following:

[0033] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0034] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0035] The second information includes at least one of the following:

[0036] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0037] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0038] The identifier of the sixth network node;

[0039] Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0040] Fifthly, a wireless communication method is provided, comprising:

[0041] The fifth network node receives the fifth message from the fourth network node;

[0042] The fifth message includes one of the following: first information, second information;

[0043] The first information includes one of the following:

[0044] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0045] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0046] The second information includes at least one of the following:

[0047] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0048] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0049] The identifier of the sixth network node;

[0050] Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0051] Sixthly, a wireless communication device is provided, comprising:

[0052] The sending module is used to send the first message to the second network node;

[0053] The first message includes at least one of the following:

[0054] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0055] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0056] The identifier of the third network node;

[0057] The identifier of the terminal;

[0058] The identifier of the serving cell of the terminal;

[0059] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the wireless communication device and the third network node.

[0060] In a seventh aspect, a wireless communication device is provided, comprising:

[0061] The receiving module is used to receive the first message from the first network node;

[0062] The first message includes at least one of the following:

[0063] The first identifier is the identifier corresponding to the first logical connection allocated by the wireless communication device to the terminal;

[0064] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0065] The identifier of the third network node;

[0066] The identifier of the terminal;

[0067] The identifier of the serving cell of the terminal;

[0068] Wherein, the first logical connection is the logical connection between the wireless communication device and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

[0069] Eighthly, a wireless communication device is provided, comprising:

[0070] The sending module is used to send a third message to the first network node;

[0071] The third message includes at least one of the following:

[0072] The first instruction information is used to instruct the first network node and the second network node to establish a logical connection;

[0073] The second indication information is used to indicate that the second network node is a candidate target network node;

[0074] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0075] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the wireless communication device.

[0076] Ninthly, a wireless communication device is provided, comprising:

[0077] The sending module is used to send the fifth message to the fifth network node;

[0078] The fifth message includes one of the following: first information, second information;

[0079] The first information includes one of the following:

[0080] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0081] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0082] The second information includes at least one of the following:

[0083] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0084] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0085] The identifier of the sixth network node;

[0086] The fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the wireless communication device and the sixth network node.

[0087] In a tenth aspect, a wireless communication device is provided, comprising:

[0088] The receiving module is used to receive the fifth message from the fourth network node;

[0089] The fifth message includes one of the following: first information, second information;

[0090] The first information includes one of the following:

[0091] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0092] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0093] The second information includes at least one of the following:

[0094] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0095] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0096] The identifier of the sixth network node;

[0097] The fourth logical connection is the logical connection between the wireless communication device and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0098] Eleventhly, a wireless communication device is provided, the device being configured to perform the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect, or implement the steps of the method described in the third aspect, or implement the steps of the method described in the fourth aspect, or implement the steps of the method described in the fifth aspect.

[0099] In a twelfth aspect, a first network node is provided, the first network node including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0100] In a thirteenth aspect, a first network node is provided, including a processor and a communication interface;

[0101] The communication interface is used to send a first message to the second network node;

[0102] The first message includes at least one of the following:

[0103] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0104] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0105] The identifier of the third network node;

[0106] The identifier of the terminal;

[0107] The identifier of the serving cell of the terminal;

[0108] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

[0109] In a fourteenth aspect, a second network node is provided, the second network node including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0110] In a fifteenth aspect, a second network node is provided, including a processor and a communication interface;

[0111] The communication interface is used to receive a first message from a first network node;

[0112] The first message includes at least one of the following:

[0113] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0114] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0115] The identifier of the third network node;

[0116] The identifier of the terminal;

[0117] The identifier of the serving cell of the terminal;

[0118] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

[0119] In a sixteenth aspect, a third network node is provided, the third network node including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the third aspect.

[0120] In a seventeenth aspect, a third network node is provided, including a processor and a communication interface;

[0121] The communication interface is used to send a third message to the first network node;

[0122] The third message includes at least one of the following:

[0123] The first instruction information is used to instruct the first network node and the second network node to establish a logical connection;

[0124] The second indication information is used to indicate that the second network node is a candidate target network node;

[0125] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0126] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the third network node.

[0127] In an eighteenth aspect, a fourth network node is provided, the fourth network node including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the fourth aspect.

[0128] In the nineteenth aspect, a fourth network node is provided, including a processor and a communication interface;

[0129] The communication interface is used to send a fifth message to the fifth network node;

[0130] The fifth message includes one of the following: first information, second information;

[0131] The first information includes one of the following:

[0132] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0133] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0134] The second information includes at least one of the following:

[0135] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0136] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0137] The identifier of the sixth network node;

[0138] Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0139] In a twentieth aspect, a fifth network node is provided, the fifth network node including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the fifth aspect.

[0140] In a twentieth aspect, a fifth network node is provided, including a processor and a communication interface;

[0141] The communication interface is used to receive a fifth message from the fourth network node;

[0142] The fifth message includes one of the following: first information, second information;

[0143] The first information includes one of the following:

[0144] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0145] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0146] The second information includes at least one of the following:

[0147] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0148] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0149] The identifier of the sixth network node;

[0150] Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0151] In a twenty-second aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect, or the steps of the method described in the fourth aspect, or the steps of the method described in the fifth aspect.

[0152] In a twentieth aspect, a wireless communication system is provided, comprising: a first network node, a second network node, and a third network node, wherein the first network node is configured to perform the steps of the method described in the first aspect, the second network node is configured to perform the steps of the method described in the second aspect, and the third network node is configured to perform the steps of the method described in the third aspect.

[0153] In a twentieth aspect, a wireless communication system is provided, comprising: a fourth network node and a fifth network node, wherein the fourth network node is configured to perform the steps of the method described in the fourth aspect, and the fifth network node is configured to perform the steps of the method described in the fifth aspect.

[0154] In a twentieth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or the method as described in the second aspect, or the method as described in the third aspect, or the method as described in the fourth aspect, or the method as described in the fifth aspect.

[0155] In a twenty-sixth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the wireless communication method as described in the first aspect, or the steps of the wireless communication method as described in the second aspect, or the steps of the wireless communication method as described in the third aspect, or the steps of the wireless communication method as described in the fourth aspect, or the steps of the wireless communication method as described in the fifth aspect.

[0156] In the embodiments of the first and second aspects, a first network node sends a first message to a second network node. The second network node may assign an identifier corresponding to the logical connection between the first and second network nodes to the terminal based on a first identifier, and / or, the second network node may determine the terminal's identifier based on a second identifier and the identifier of a third network node, and / or, the second network node may determine the terminal's current serving network node based on the identifier of the terminal's serving cell, so that a non-terminal serving network node can proactively initiate candidate cell configuration changes or releases. Thus, when the terminal performs continuous inter-CU LTM, at least two candidate network nodes (such as candidate CUs) can establish a logical connection, and the candidate network nodes (such as candidate CUs) can learn the terminal's current serving network node (such as the serving CU), thereby enabling non-terminal serving network nodes (such as non-serving CUs) to proactively initiate candidate cell configuration changes or releases.

[0157] In the third aspect of the embodiment, the third network node sends a third message to the first network node to trigger the first network node to send a first message to the second network node. Thus, when the terminal performs continuous inter-CU LTM, a logical connection can be established between at least two candidate network nodes (such as candidate CUs), and the candidate network nodes (such as candidate CUs) can know the terminal's current serving network node (such as serving CU). Furthermore, the non-serving network node (such as non-serving CU) can actively initiate candidate cell configuration changes or releases.

[0158] In embodiments of the fourth and fifth aspects, the fourth network node sends a fifth message to the fifth network node. The fifth network node can determine the current serving network node of the terminal based on the first information, so that the serving network node of the non-terminal can actively initiate candidate cell configuration changes or releases. Alternatively, the fifth network node can establish a logical connection between the fifth network node and the sixth network node based on the second information. Thus, when the terminal performs continuous inter-CU LTM, a logical connection can be established between at least two candidate network nodes (such as candidate CUs), and the candidate network nodes (such as candidate CUs) can know the current serving network node of the terminal (such as the serving CU), thereby allowing the non-terminal serving network node (such as the non-serving CU) to actively initiate candidate cell configuration changes or releases. Attached Figure Description

[0159] Figure 1 This is a schematic diagram of a communication system architecture provided in an embodiment of this application.

[0160] Figure 2 This is a schematic diagram of a CU-DU architecture provided in this application.

[0161] Figure 3This is a schematic flowchart of an LTM provided in this application.

[0162] Figure 4 This is a schematic flowchart of another LTM provided in this application.

[0163] Figure 5 This is a schematic flowchart of a wireless communication method provided according to an embodiment of this application.

[0164] Figures 6 to 9 These are schematic flowcharts of cell handover provided according to the embodiments of this application.

[0165] Figure 10 This is a schematic flowchart of another wireless communication method provided according to an embodiment of this application.

[0166] Figures 11 to 13 These are schematic flowcharts of cell handover provided according to the embodiments of this application.

[0167] Figure 14 This is a schematic block diagram of a wireless communication device provided according to an embodiment of this application.

[0168] Figure 15 This is a schematic block diagram of another wireless communication device provided according to an embodiment of this application.

[0169] Figure 16 This is a schematic block diagram of another wireless communication device provided according to an embodiment of this application.

[0170] Figure 17 This is a schematic block diagram of another wireless communication device provided according to an embodiment of this application.

[0171] Figure 18 This is a schematic block diagram of another wireless communication device provided according to an embodiment of this application.

[0172] Figure 19 This is a schematic block diagram of a communication device provided according to an embodiment of this application.

[0173] Figure 20 This is a schematic diagram of the hardware structure of a terminal according to an embodiment of this application.

[0174] Figure 21 This is a schematic block diagram of a network-side device provided according to an embodiment of this application. Detailed Implementation

[0175] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0176] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0177] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0178] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0179] Figure 1 This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. Specifically, the wireless communication system includes a terminal 11 and a network-side device 12.

[0180] Terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in the embodiments of this application.

[0181] Among them, network-side equipment 12 may include access network equipment or core network equipment.

[0182] Alternatively, access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, wireless local area network (WLAN) access points (APs), or wireless Fidelity (WiFi) nodes, etc. The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NRNode B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0183] Optionally, core network equipment may also be referred to as core network nodes, core network functions, or core network elements, and includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), and Local NEF. The core network equipment (NEF, or L-NEF) includes the following functions: Binding Support Function (BSF), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), and Network Data Analytics Function (NWDAF). It should be noted that this application only uses core network equipment in the NR system as an example and does not limit the specific type of core network equipment. If the name of the core network equipment mentioned in this application changes in subsequent protocol versions (e.g., 6G), it will still be within the scope of protection of this application.

[0184] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0185] To facilitate a better understanding of the embodiments of this application, the Central Unit (CU) and Distributed Unit (DU) will be described.

[0186] The NR access network splits the gNB into gNB-CU and gNB-DU, and connects them via the F1 interface. Specifically, the architecture diagram of the CU-DU can be seen as follows: Figure 2 As shown.

[0187] like Figure 2 As shown, the 5G Core Network (5GC) connects to gNBs in the Next Generation Radio Access Network (NG-RAN) via the NG interface, and gNBs are connected to each other via the Xn-C interface. Figure 2 As shown, a gNB contains only one CU, which contains one or more DUs. A DU contains one or more cells. The CU contains the Packet Data Convergence Protocol (PDCP) and above the protocol stack, while the DU contains the protocol stack below the PDCP layer (such as Radio Link Control (RLC), Media Access Control (MAC), and Physical Layer (PHY)).

[0188] To facilitate a better understanding of the embodiments of this application, L1 / L2-triggered mobility (LTM) will be described.

[0189] To reduce handover latency, LTM is introduced, which means that the network pre-configures multiple LTM candidate cells. Based on the Layer 1 measurement results reported by the terminal, the DU uses Layer 1 / Layer 2 (L1 / L2) signaling to instruct the terminal to hand over to a suitable LTM candidate cell.

[0190] For example, LTM supports cell handover within the same CU. The candidate cell can belong to the same DU or a different DU as the source cell. The LTM procedure can be as follows: Figure 3 As shown, the specific steps may include the following:

[0191] Step 1. The UE sends a measurement report to the gNB;

[0192] Step 2. gNB sends an RRC reconfiguration message (LTM candidate configuration) to the UE;

[0193] Step 3. The UE sends an RRC reconfiguration complete message to the gNB;

[0194] Step 4a. Downlink synchronization with candidate cell;

[0195] Step 4b. Uplink synchronization with candidate cell;

[0196] Step 5. The UE sends a layer 1 (L1) measurement report to the gNB;

[0197] Step 6. The gNB sends a cell handover command to the UE (e.g., via the Media Access Control Element (MAC CE)).

[0198] Step 7. Initiate the random access procedure;

[0199] Step 8. LTM complete.

[0200] It should be noted that, Figure 3 In this context, gNB can also be referred to as CU.

[0201] For example, LTM supports cell handover across CUs and continuous inter-CU LTM, meaning the UE can continuously handover between multiple pre-configured CUs without requiring RRC reconfiguration. The LTM procedure can be as follows: Figure 4 As shown, the specific steps may include the following:

[0202] Step 1. The UE sends a measurement report to the source gNB;

[0203] Step 2. The source gNB performs LTM preparation decisions;

[0204] Step 3. The source gNB sends a handover request to the candidate gNB (also known as the target gNB);

[0205] Step 4. Candidate gNBs perform admission control;

[0206] Step 5. The candidate gNB sends a handover request confirmation to the source gNB;

[0207] Step 6. Perform LTM on the source gNB and candidate gNB to prepare for modification;

[0208] Step 7. The source gNB sends an RRC reconfiguration message to the UE;

[0209] Step 8. The UE sends an RRC reconfiguration complete message to the source gNB;

[0210] Step 9a. Downlink synchronization with candidate cell;

[0211] Step 9b. Uplink synchronization with candidate cell;

[0212] Step 10. The UE sends an L1 measurement report to the source gNB;

[0213] Step 11. The source gNB sends a cell handover command to the UE (e.g., via MAC CE bearer);

[0214] Step 12. The source gNB sends a cell handover notification to the candidate gNB;

[0215] Step 13. The source gNB sends the sequence number (SN) to the candidate gNB for state transition;

[0216] Step 14. Data forwarding;

[0217] Step 15. Initiate the Random Access Procedure (RACH);

[0218] Step 16. LTM cell handover complete;

[0219] Step 17. The candidate gNB sends a handover success message to the source gNB;

[0220] Step 18. The candidate gNB sends a path switching request to the AMF;

[0221] Step 19. Path switching in UPF;

[0222] Step 20. The AMF sends a path switching request confirmation to the candidate gNB.

[0223] It should be noted that, Figure 4 The source gNB in ​​the code can also be called the source CU. Figure 4The candidate gNB in ​​the process can also be called the target CU. The successful handover in step 17 is the target CU notifying the source CU that the handover was successful. The message carries the identifier (ID) of the target cell.

[0224] To facilitate a better understanding of the embodiments of this application, the problems solved by this application will be explained.

[0225] Taking the Xn interface between NG-RAN nodes as an example, after two NG-RAN nodes exchange the first XnAP message, a UE-associated logical connection is established between the two NG-RAN nodes. The source NG-RAN node assigns an old NG-RAN node UE XnAP ID to uniquely identify the UE within the source NG-RAN node on the Xn interface. The target NG-RAN node assigns a new NG-RAN node UE XnAP ID to uniquely identify the UE within the target NG-RAN node on the Xn interface. Each logical connection corresponds to one of these two XnAP IDs (i.e., the Old NG-RAN node UE XnAP ID and the New NG-RAN node UE XnAP ID).

[0226] After a logical connection is established, when the two NG-RAN nodes transmit UE-associated signaling, the message will carry both the Source NG-RAN node UE XnAPID and the Target NG-RAN node UE XnAP ID.

[0227] For example, the source NG-RAN node sends a handover request message to the target NG-RAN node, carrying the Source NG-RAN node UE XnAP ID assigned by the source NG-RAN node; after receiving the handover request message, the target NG-RAN node replies with a handover request acknowledgment message, carrying the target NG-RAN node UE XnAP ID assigned by the target NG-RAN node; at this point, the logical connection is successfully established, and subsequent UE-associated signaling will carry these two XnAP IDs (i.e., the Old NG-RAN node UE XnAP ID and the New NG-RAN node UE XnAP ID) to identify the UE.

[0228] It should be noted that the source NG-RAN node can also be called the source CU, and the target NG-RAN node can also be called the target CU.

[0229] As shown above, transmitting UE-associated signaling between CUs (i.e., between the source CU and the target CU) requires first establishing a logical connection and assigning an Xn AP ID. For consecutive inter-CN (inter-CU) LTM, how to establish logical connections between multiple candidate CUs for subsequent continuous handover remains to be solved. Furthermore, after handover, the target CU notifies the source CU of the successful handover; however, other candidate CUs are unaware of the UE's current serving CU and therefore cannot proactively initiate candidate cell configuration changes or releases.

[0230] The wireless communication method provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0231] Figure 5 This is a schematic flowchart of a wireless communication method 200 according to an embodiment of this application, such as... Figure 5 As shown, the wireless communication method 200 may include at least some of the following:

[0232] S210, the first network node sends the first message to the second network node;

[0233] The first message includes at least one of the following:

[0234] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0235] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0236] The identifier of the third network node;

[0237] The identifier of the terminal;

[0238] The identifier of the serving cell of the terminal;

[0239] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node;

[0240] S220, the second network node receives the first message from the first network node.

[0241] It should be understood that Figure 5 The steps or operations of the wireless communication method 200 are illustrated, but these steps or operations are merely examples, and other operations may be performed in this application. Figure 5 Variations of various operations within it.

[0242] In some embodiments, the network node described in this application can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). For example, the network node described in the application embodiment is an NG-RAN node.

[0243] The handover described in the embodiments of this application may refer to cell handover, such as continuous inter-CU LTM.

[0244] The logical connection described in the embodiments of this application can be understood as a virtual connection partitioned from a physical connection.

[0245] In this application, a logical connection refers to a virtual connection established between two network nodes. This virtual connection can be established for each UE, namely, a UE-associated logical connection. UE-associated signaling is transmitted through this logical connection. The two network nodes uniquely identify a UE by assigning an AP ID (e.g., NG-RAN node UE XnAP ID).

[0246] In some embodiments, the identifier corresponding to the logical connection described in this application can be an XnAP ID. The identifier corresponding to a logical connection can include two XnAP IDs assigned to the terminal by the network nodes at both ends of the logical connection. One XnAP ID can be called the source XnAP ID, and the other XnAP ID can be called the target XnAP ID.

[0247] For example, for a logical connection between a first network node and a second network node, the first network node assigns XnAP ID 1 to the terminal, and the second network node assigns XnAP ID 2 to the terminal. After the first network node and / or the second network node obtain XnAP ID 1 and XnAP ID 2, it indicates that the logical connection between the first network node and the second network node has been established.

[0248] In some embodiments, the identifier of the third network node may be a Global NG-RAN Node ID.

[0249] In some embodiments, the identifier of the cell described in this application can be a New Radio (NR) Cell Global Identity (CGI). For example, the identifier of the serving cell of the terminal is an NR CGI.

[0250] In some implementations, after obtaining the first identifier through the first message, the second network node can allocate an identifier corresponding to the logical connection between the first network node and the second network node to the terminal based on the first identifier. For example, the identifier corresponding to the logical connection between the first network node and the second network node allocated by the second network node to the terminal can be the first identifier, or the second network node can allocate the identifier corresponding to the logical connection between the first network node and the second network node to the terminal with reference to the first identifier.

[0251] In some implementations, after the second network node obtains the second identifier and the identifier of the third network node through the first message, the second network node can determine the identifier of the terminal based on the second identifier and the identifier of the third network node. After determining the identifier of the terminal, the second network node can allocate an identifier corresponding to the logical connection between the first network node and the second network node to the terminal. That is, after knowing the identifier of the terminal, the second network node can know the object to which the identifier corresponding to the logical connection needs to be allocated.

[0252] In some implementations, after obtaining the terminal's identifier through the first message, the second network node can assign an identifier corresponding to the logical connection between the first and second network nodes to the terminal. That is, after obtaining the terminal's identifier, the second network node can determine the object to which the identifier corresponding to the logical connection needs to be assigned.

[0253] In some implementations, after the second network node obtains the identifier of the serving cell of the terminal through the first message, it can know the current serving network node of the terminal based on the identifier of the serving cell of the terminal, and thus can actively initiate candidate cell configuration changes or releases.

[0254] In the embodiments of this application, when the terminal performs continuous inter-CU LTM, at least two candidate network nodes can establish a logical connection, and the candidate network nodes can know the current serving network node of the terminal. In addition, the serving network node of the non-terminal can actively initiate candidate cell configuration changes or releases.

[0255] In some embodiments, the wireless communication method 200 further includes:

[0256] The first network node receives the second message from the second network node;

[0257] The second message includes at least one of the following:

[0258] The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal;

[0259] The identifier of the third network node.

[0260] In this embodiment, after obtaining the third identifier and the identifier of the third network node through the second message, the first network node can determine the identifier of the terminal based on the third identifier and the identifier of the third network node. After determining the identifier of the terminal, the first network node can allocate an identifier corresponding to the logical connection between the first network node and the second network node to the terminal. That is, after knowing the identifier of the terminal, the first network node can know the object to which the identifier corresponding to the logical connection needs to be allocated.

[0261] In some embodiments, the second identifier is the same as the third identifier. That is, the identifier corresponding to the first logical connection allocated by the third network node to the terminal is the same as the identifier corresponding to the second logical connection allocated by the third network node to the terminal.

[0262] In some embodiments, the first message further includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to a third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the first network node and the second network node.

[0263] In some embodiments, the second message further includes at least one of the following:

[0264] The fourth identifier;

[0265] The fifth identifier is the identifier corresponding to the third logical connection allocated by the second network node to the terminal.

[0266] In this embodiment of the application, after the first network node obtains the fourth and fifth identifiers through the second message, the first network node knows that the logical connection between the first network node and the second network node has been established.

[0267] In some embodiments, before the first network node sends the first message to the second network node, the wireless communication method 200 further includes:

[0268] The first network node receives a third message from the third network node;

[0269] The third message includes at least one of the following:

[0270] The first instruction information is used to instruct the first network node and the second network node to establish a logical connection;

[0271] The second indication information is used to indicate that the second network node is a candidate target network node;

[0272] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0273] The first identifier.

[0274] In this embodiment, the first network node can learn the logical connection to be established based on the third message, and / or, the first network node can learn the candidate target network nodes based on the third message and establish a logical connection with the candidate target network nodes. For example, the first network node can learn that the second network node is a candidate target network node based on the second indication information. As another example, the first network node can learn one or more candidate target network nodes, including the second network node, based on the candidate cell identifier list.

[0275] In some embodiments, after the first network node receives the third message, the wireless communication method 200 further includes:

[0276] The first network node sends a fourth message to the third network node;

[0277] The fourth message is used to indicate that the third message has been successfully received.

[0278] In some embodiments, the third message is received by the first network node after it receives the handover request message from the third network node. In this embodiment, the first network node can receive the third message after receiving the handover request message, and thus can initiate the establishment of a logical connection after receiving the handover request message.

[0279] In some embodiments, the third message is a handover request message received by the first network node from the third network node. In this embodiment, the third message is a handover request message, thereby avoiding the signaling overhead caused by sending a separate third message. The first network node can initiate the establishment of a logical connection after receiving the handover request message.

[0280] In some embodiments, the fourth message is sent by the first network node after sending a handover request confirmation message to the third network node, or the fourth message is a handover request confirmation message sent by the first network node to the third network node. Optionally, the first network node is a candidate target network node, the second network node is a candidate target network node, and the third network node is a source network node.

[0281] In the application embodiment, logical connections are established between all candidate target network nodes during the handover preparation process to ensure that the network side can perform signaling interaction normally and in a timely manner during continuous handover, thereby avoiding handover delay.

[0282] In some embodiments, the first message is sent by the first network node before the cell handover is completed; or, the first message is sent by the first network node after the cell handover is completed.

[0283] In some embodiments, the first network node is a target network node, the second network node is a candidate target network node, and the third network node is a source network node.

[0284] In the proposed embodiment, after the handover is complete, a logical connection is established between the target network node and other candidate target network nodes to avoid the interface signaling overhead caused by establishing logical connections between all candidate target network nodes. Furthermore, after the handover is complete, the target network node notifies other candidate target network nodes of the terminal's current serving network node, enabling other candidate target network nodes to send messages to the terminal's current serving network node when they need to change or release the terminal's configuration.

[0285] The technical solution of the wireless communication method 200 in this application is described below through Examples 1 to 4.

[0286] Example 1, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN nodes 2 and 3 are candidate target network nodes. Specifically, NG-RAN node 2 can correspond to the first network node, NG-RAN node 3 can correspond to the second network node, and NG-RAN node 1 can correspond to the third network node. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN nodes 2 and NG-RAN nodes 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 1, during the handover preparation phase, after the handover request message, NG-RAN node 1 can instruct NG-RAN nodes to establish logical connections between each other. The process of Example 1 can be as follows: Figure 6 As shown, it may specifically include some or all of the steps in S1-1 to S1-8 below.

[0287] S1-1. NG-RAN node 1 sends a handover request message 1 to NG-RAN node 2, wherein the handover request message 1 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0288] S1-2. NG-RAN node 2 sends a handover request confirmation message 1 to NG-RAN node 1, wherein the handover request confirmation message 1 includes the candidate cell configuration provided by NG-RAN node 2.

[0289] S1-3. NG-RAN node 1 sends a handover request message 2 to NG-RAN node 3, wherein the handover request message 2 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0290] S1-4. NG-RAN node 3 sends a handover request confirmation message 2 to NG-RAN node 1, wherein the handover request confirmation message 2 includes candidate cell configurations provided by NG-RAN node 3.

[0291] S1-5. NG-RAN node 1 sends message 11 to NG-RAN node 2;

[0292] The message 11 includes at least one of the following:

[0293] Instruction Message 1 is used to instruct NG-RAN Node 2 and NG-RAN Node 3 to establish a logical connection;

[0294] Indication 2 indicates that NG-RAN node 3 is the current candidate target network node;

[0295] The candidate cell identifier list includes cell identifiers corresponding to NG-RAN node 3. For example, the cell identifiers in the candidate cell identifier list can be New Radio (NR) Cell Global Identity (CGI).

[0296] Target NG-RAN node UE XnAP ID 1 is assigned to the UE by NG-RAN node 3. Target NG-RAN node UE XnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 when NG-RAN node 1 and NG-RAN node 3 establish a logical connection.

[0297] It should be noted that message 11 corresponds to the aforementioned third message.

[0298] S1-6. NG-RAN node 2 replies to NG-RAN node 1 with message 12, where message 12 indicates that message 11 has been successfully received.

[0299] It should be noted that steps S1-6 are optional.

[0300] It should be noted that message 12 corresponds to the aforementioned fourth message.

[0301] S1-7. NG-RAN node 2 sends message 13 to NG-RAN node 3;

[0302] Message 13 includes at least one of the following:

[0303] NG-RAN node 2 assigns Source NG-RAN node UE XnAP ID 1 to the UE, where Source NG-RAN node UE XnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3;

[0304] The global NG-RAN node ID of NG-RAN node 1;

[0305] The Source NG-RAN node UE XnAP ID 2 assigned by NG-RAN node 1 to the UE is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 2 when establishing a logical connection between NG-RAN node 1 and NG-RAN node 2.

[0306] NG-RAN node 3 assigns Target NG-RAN node UE XnAP ID 2 to the UE, where Target NG-RAN node UE XnAP ID 2 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 3 and NG-RAN node 1.

[0307] UE identifier.

[0308] It should be noted that message 13 corresponds to the aforementioned first message.

[0309] Optionally, NG-RAN node 3 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 2 assigned to the UE by NG-RAN node 1; furthermore, after obtaining the relevant information about the UE, NG-RAN node 3 can assign an identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 to the UE.

[0310] S1-8. NG-RAN node 3 sends message 14 to NG-RAN node 2;

[0311] Message 14 includes at least one of the following:

[0312] NG-RAN node 2 assigns the UE's Source NG-RAN node ID 1;

[0313] Target NG-RAN node UE XnAP ID 3 is assigned to the UE by NG-RAN node 3. Target NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 assigned to the UE by NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3.

[0314] The global NG-RAN node ID of NG-RAN node 1;

[0315] NG-RAN node 1 assigns Source NG-RAN node UE XnAP ID 3 to the UE, where Source NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 1 and NG-RAN node 3;

[0316] UE identifier.

[0317] It should be noted that message 14 corresponds to the aforementioned second message.

[0318] Optionally, NG-RAN node 2 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 3 assigned to the UE by NG-RAN node 1; furthermore, NG-RAN node 2 can determine that the Target NG-RAN node UE XnAP ID 3 assigned by NG-RAN node 3 is for this UE.

[0319] It should be noted that in Embodiment 1, messages 11 and 12 can also be messages exchanged between NG-RAN node 1 and NG-RAN node 3, that is, they can instruct NG-RAN node 3 and NG-RAN node 2 to establish a logical connection; in this case, NG-RAN node 3 sends message 13 to NG-RAN node 2, and NG-RAN node 2 sends message 14 to NG-RAN node 3.

[0320] Therefore, in Example 1, logical connections are established between all candidate NG-RAN nodes during the handover preparation process to ensure that the network side can perform signaling interaction normally and in a timely manner when the terminal continuously switches between multiple candidate NG-RAN nodes, thus avoiding handover delay caused by establishing logical connections every time a handover occurs.

[0321] Example 2, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN nodes 2 and 3 are candidate target network nodes. Specifically, NG-RAN node 2 can correspond to the first network node mentioned above, NG-RAN node 3 can correspond to the second network node mentioned above, and NG-RAN node 1 can correspond to the third network node mentioned above. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN nodes 2 and NG-RAN nodes 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 2, during the handover preparation phase, in the handover request message, NG-RAN node 1 can instruct NG-RAN nodes to establish logical connections between each other. The process of Example 2 can be as follows: Figure 7 As shown, it may specifically include some or all of the steps in S2-1 to S2-6 below.

[0322] S2-1. NG-RAN node 1 sends a handover request message 1 to NG-RAN node 2, wherein the handover request message 1 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0323] Optionally, the handover request message 1 includes at least one of the following:

[0324] Instruction Message 1 is used to instruct NG-RAN Node 2 and NG-RAN Node 3 to establish a logical connection;

[0325] Indication 2 indicates that NG-RAN node 3 is the current candidate target network node;

[0326] A candidate cell identifier list, wherein the candidate cell identifier list includes cell identifiers corresponding to NG-RAN node 3, for example, the cell identifiers in the candidate cell identifier list can be NR CGI;

[0327] Target NG-RAN node UE XnAP ID 1 is assigned to the UE by NG-RAN node 3. Target NG-RAN node UE XnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 when NG-RAN node 1 and NG-RAN node 3 establish a logical connection.

[0328] It should be noted that the switching request message 1 corresponds to the aforementioned third message.

[0329] S2-2. NG-RAN node 2 sends a handover request confirmation message 1 to NG-RAN node 1, wherein the handover request confirmation message 1 includes the candidate cell configuration provided by NG-RAN node 2.

[0330] It should be noted that the switching request confirmation message 1 corresponds to the aforementioned fourth message.

[0331] S2-3. NG-RAN node 1 sends a handover request message 2 to NG-RAN node 3, wherein the handover request message 2 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0332] Optionally, the switching request message 2 includes at least one of the following:

[0333] Instruction message 3 is used to instruct NG-RAN node 3 to establish a logical connection with NG-RAN node 2;

[0334] Indication information 4 is used to indicate that NG-RAN node 2 is the current candidate target node;

[0335] A candidate cell identifier list, wherein the candidate cell identifier list includes the cell identifier corresponding to NG-RAN node 2, for example, the cell identifier in the candidate cell identifier list can be NR CGI.

[0336] S2-4. NG-RAN node 3 sends a handover request confirmation message 2 to NG-RAN node 1, wherein the handover request confirmation message 2 includes candidate cell configurations provided by NG-RAN node 3.

[0337] S2-5. NG-RAN node 2 sends message 21 to NG-RAN node 3;

[0338] The message 21 includes at least one of the following:

[0339] NG-RAN node 2 assigns Source NG-RAN node UE XnAP ID 1 to the UE, where Source NG-RAN node UE XnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3;

[0340] The global NG-RAN node ID of NG-RAN node 1;

[0341] The Source NG-RAN node UE XnAP ID 2 assigned by NG-RAN node 1 to the UE is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 2 when establishing a logical connection between NG-RAN node 1 and NG-RAN node 2.

[0342] NG-RAN node 3 assigns Target NG-RAN node UE XnAP ID 2 to the UE, where Target NG-RAN node UE XnAP ID 2 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 3 and NG-RAN node 1.

[0343] UE identifier.

[0344] It should be noted that message 21 corresponds to the first message mentioned above.

[0345] Optionally, NG-RAN node 3 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 2 assigned to the UE by NG-RAN node 1; furthermore, after obtaining the relevant information about the UE, NG-RAN node 3 can assign an identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 to the UE.

[0346] S2-6. NG-RAN node 3 sends message 22 to NG-RAN node 2;

[0347] The message 22 includes at least one of the following:

[0348] NG-RAN node 2 assigns the UE's Source NG-RAN node ID 1;

[0349] Target NG-RAN node UE XnAP ID 3 is assigned to the UE by NG-RAN node 3. Target NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 assigned to the UE by NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3.

[0350] The global NG-RAN node ID of NG-RAN node 1;

[0351] NG-RAN node 1 assigns Source NG-RAN node UE XnAP ID 3 to the UE, where Source NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 1 and NG-RAN node 3;

[0352] UE identifier.

[0353] It should be noted that message 22 corresponds to the aforementioned second message.

[0354] Optionally, NG-RAN node 2 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 3 assigned to the UE by NG-RAN node 1; furthermore, NG-RAN node 2 can determine that the Target NG-RAN node UE XnAP ID 3 assigned by NG-RAN node 3 is for this UE.

[0355] It should be noted that in Embodiment 2, message 21 can also be sent by NG-RAN node 3, and message 22 can also be sent by NG-RAN node 2.

[0356] Therefore, in Embodiment 2, a logical connection is established between all candidate NG-RAN nodes during the handover preparation process to ensure that the network side can perform signaling interaction normally and in a timely manner when the terminal continuously switches between multiple candidate NG-RAN nodes, thus avoiding the handover delay caused by establishing a logical connection each time a handover occurs.

[0357] Example 3, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN node 2 and NG-RAN node 3 are candidate target network nodes. Specifically, NG-RAN node 2 can correspond to the first network node mentioned above, NG-RAN node 3 can correspond to the second network node mentioned above, and NG-RAN node 1 can correspond to the third network node mentioned above. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN node 2 and NG-RAN node 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 3, after the handover is completed, the target NG-RAN node (i.e., NG-RAN node 2) establishes a logical connection with other NG-RAN nodes. The process of Example 3 can be as follows: Figure 8 As shown, it may specifically include some or all of the steps in S3-1 to S3-4 below.

[0358] S3-1. Switching preparation and switching execution process.

[0359] S3-2. After the UE switches to NG-RAN node 2, NG-RAN node 2 sends a handover completion message to NG-RAN node 1.

[0360] S3-3. NG-RAN node 2 sends message 31 to NG-RAN node 3;

[0361] The message 31 includes at least one of the following:

[0362] NG-RAN node 2 assigns Source NG-RAN node UE XnAP ID 1 to the UE, where Source NG-RAN node UE XnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3;

[0363] The global NG-RAN node ID of NG-RAN node 1;

[0364] The Source NG-RAN node UE XnAP ID 2 assigned by NG-RAN node 1 to the UE is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 2 when establishing a logical connection between NG-RAN node 1 and NG-RAN node 2.

[0365] NG-RAN node 3 assigns Target NG-RAN node UE XnAP ID 2 to the UE, where Target NG-RAN node UE XnAP ID 2 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 3 and NG-RAN node 1.

[0366] UE identifier.

[0367] It should be noted that message 31 corresponds to the first message mentioned above.

[0368] Optionally, NG-RAN node 3 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 2 assigned to the UE by NG-RAN node 1; furthermore, after obtaining the relevant information about the UE, NG-RAN node 3 can assign an identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 to the UE.

[0369] S3-4. NG-RAN node 3 sends message 32 to NG-RAN node 2;

[0370] The message 32 includes at least one of the following:

[0371] NG-RAN node 2 assigns the UE's Source NG-RAN node ID 1;

[0372] Target NG-RAN node UE XnAP ID 3 is assigned to the UE by NG-RAN node 3. Target NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 2 and NG-RAN node 3 assigned to the UE by NG-RAN node 3 when establishing a logical connection between NG-RAN node 2 and NG-RAN node 3.

[0373] The global NG-RAN node ID of NG-RAN node 1;

[0374] NG-RAN node 1 assigns Source NG-RAN node UE XnAP ID 3 to the UE, where Source NG-RAN node UE XnAP ID 3 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE when establishing a logical connection between NG-RAN node 1 and NG-RAN node 3;

[0375] UE identifier.

[0376] It should be noted that message 32 corresponds to the aforementioned second message.

[0377] Optionally, NG-RAN node 2 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID 3 assigned to the UE by NG-RAN node 1; furthermore, NG-RAN node 2 can determine that the Target NG-RAN node UE XnAP ID 3 assigned by NG-RAN node 3 is for this UE.

[0378] Therefore, in Example 3, after the handover is completed, a logical connection is established between the target NG-RAN node and other candidate NG-RAN nodes to avoid the interface signaling overhead caused by establishing logical connections between all NG-RAN nodes.

[0379] Example 4, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN nodes 2 and 3 are candidate target network nodes. Specifically, NG-RAN node 2 can correspond to the first network node mentioned above, NG-RAN node 3 can correspond to the second network node mentioned above, and NG-RAN node 1 can correspond to the third network node mentioned above. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN node 2 and NG-RAN node 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 4, after the handover is completed, the target NG-RAN node (i.e., NG-RAN node 2) notifies other NG-RAN nodes of the identifier of the UE's current serving cell. The process of Example 4 can be as follows: Figure 9As shown, it may specifically include some or all of the steps in S4-1 to S4-3 below.

[0380] S4-1. Switching preparation and switching execution process.

[0381] S4-2. After the UE switches to NG-RAN node 2, NG-RAN node 2 sends a handover completion message to NG-RAN node 1.

[0382] S4-3. NG-RAN node 2 sends message 41 to NG-RAN node 3;

[0383] The message 41 includes at least one of the following:

[0384] The identifier of the UE's current serving cell, such as NR CGI;

[0385] The global NG-RAN node ID of NG-RAN node 1;

[0386] The Source NG-RAN node UE XnAP ID assigned to the UE by NG-RAN node 1 (corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 2).

[0387] It should be noted that the identifier of the UE's current serving cell can also be replaced with the identifier of the NG-RAN node where the UE is currently camped; this embodiment does not limit this.

[0388] Optionally, NG-RAN node 3 can determine relevant information about the UE (such as the UE's identifier) ​​based on the Global NG-RAN Node ID of NG-RAN node 1 and the Source NG-RAN node UE XnAP ID assigned to the UE by NG-RAN node 1.

[0389] Therefore, in Example 4, after the handover is completed, the target NG-RAN node notifies other NG-RAN nodes of the identifier of the UE's current serving cell, so that when other NG-RAN nodes need to change or release the UE configuration, they can send a message to the NG-RAN node where the UE is currently located.

[0390] Figure 10 This is a schematic flowchart of a wireless communication method 300 according to an embodiment of this application, such as... Figure 10 As shown, the wireless communication method 300 may include at least some of the following:

[0391] S310, the fourth network node sends the fifth message to the fifth network node;

[0392] The fifth message includes one of the following: first information, second information;

[0393] The first information includes one of the following:

[0394] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0395] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0396] The second information includes at least one of the following:

[0397] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0398] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0399] The identifier of the sixth network node;

[0400] Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node;

[0401] S320, the fifth network node receives the fifth message from the fourth network node.

[0402] It should be understood that Figure 10 The steps or operations of the wireless communication method 300 are illustrated, but these steps or operations are merely examples, and other operations may be performed in this application. Figure 10 Variations of various operations within it.

[0403] In some embodiments, the network node described in this application can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). For example, the network node described in the application embodiment is an NG-RAN node.

[0404] The handover described in the embodiments of this application may refer to cell handover, such as continuous inter-CU LTM.

[0405] The logical connection described in the embodiments of this application can be understood as a virtual connection partitioned from a physical connection.

[0406] In this application, a logical connection refers to a virtual connection established between two network nodes. This virtual connection can be established for each UE, namely, a UE-associated logical connection. UE-associated signaling is transmitted through this logical connection. The two network nodes uniquely identify a UE by assigning an AP ID (e.g., NG-RAN node UE XnAP ID).

[0407] In some embodiments, the identifier corresponding to the logical connection described in this application can be an XnAP ID. The identifier corresponding to a logical connection can include two XnAP IDs assigned to the terminal by the network nodes at both ends of the logical connection. One XnAP ID can be called the source XnAP ID, and the other XnAP ID can be called the target XnAP ID.

[0408] For example, for the logical connection between the fifth network node and the sixth network node, the fifth network node assigns XnAP ID a to the terminal, and the sixth network node assigns XnAP ID b to the terminal. After the fifth network node and / or the sixth network node obtain XnAP ID a and XnAP ID b, it indicates that the logical connection between the fifth network node and the sixth network node has been established.

[0409] In some embodiments, the identifier of the sixth network node may be a Global NG-RAN Node ID.

[0410] In some embodiments, the identifier of the cell described in this application can be a New Radio (NR) Cell Global Identity (CGI). For example, the identifier of the serving cell of the terminal is an NR CGI.

[0411] In this embodiment, the fourth network node sends a fifth message to the fifth network node. The fifth network node can determine the current serving network node of the terminal based on the first information, so that the serving network node of the non-terminal can actively initiate candidate cell configuration changes or releases. Alternatively, the fifth network node can establish a logical connection between the fifth network node and the sixth network node based on the second information. Thus, when the terminal performs continuous inter-CU LTM, at least two candidate network nodes (such as candidate CUs) can establish a logical connection, and the candidate network nodes (such as candidate CUs) can know the current serving network node of the terminal (such as the serving CU), thereby allowing the non-terminal serving network node (such as the non-serving CU) to actively initiate candidate cell configuration changes or releases.

[0412] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the serving cell and / or the identifier of the serving network node of the terminal, the fifth message is sent by the fourth network node after the cell handover is completed. Optionally, the fourth network node is a source network node, and the fifth network node is a candidate target network node.

[0413] In this embodiment, after the switch is completed, the source network node notifies other candidate target network nodes of the terminal's current serving network node, so that when other candidate target network nodes need to change or release the terminal's configuration, they can send a message to the terminal's current serving network node.

[0414] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the fourth network node after sending the cell handover command, or the fifth message is sent by the fourth network node after receiving the cell handover command sending indication. Optionally, the fourth network node is the source network node, and the fifth network node is a candidate target network node other than the target network node.

[0415] In this embodiment, when a handover is initiated, the source network node notifies other candidate target network nodes that the terminal is about to switch to the target network node, so that when other candidate target network nodes need to change or release the terminal's configuration, they can send a message to the terminal's current serving network node.

[0416] In some embodiments, where the fifth message includes the second information and the second information includes the fifth identifier, the wireless communication method 300 further includes the following before the fourth network node sends the fifth message to the fifth network node:

[0417] The fourth network node sends a sixth message to the sixth network node, the sixth message being used to indicate that the fifth network node is a candidate target network node;

[0418] The fourth network node receives the seventh message from the sixth network node;

[0419] The seventh message includes at least one of the following:

[0420] The fifth identifier, the identifier of the sixth network node.

[0421] In this embodiment, when the sixth network node learns that the fifth network node is a candidate target network node, the sixth network node assigns the identifier corresponding to the fourth logical connection to the terminal, that is, the sixth network node assigns the fifth identifier to the terminal.

[0422] Optionally, the sixth message is a handover request message, and / or the seventh message is a handover request confirmation message.

[0423] In some embodiments, when the fifth message includes the second information and the second information includes the sixth identifier, the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal may be the same as the identifier corresponding to the fourth logical connection allocated by the sixth network node to the terminal.

[0424] In some embodiments, where the fifth message includes the second information, the fifth message is sent by the fourth network node after receiving a handover request confirmation message from the fifth network node, or the fifth message is a handover request message sent by the fourth network node to the fifth network node.

[0425] In some embodiments, when the fifth message includes the second information, the messages exchanged between the fifth network node and the sixth network node include at least one of the following:

[0426] The fifth identifier;

[0427] The seventh identifier is the identifier corresponding to the fourth logical connection allocated by the fifth network node to the terminal;

[0428] The eighth identifier is the identifier corresponding to the sixth logical connection allocated by the fourth network node to the terminal, and the sixth logical connection is the logical connection between the fourth network node and the fifth network node;

[0429] The ninth identifier is the identifier corresponding to the fifth logical connection allocated by the fourth network node to the terminal.

[0430] In some embodiments, the fourth network node is a source network node, the fifth network node is a candidate target network node, and the sixth network node is a candidate target network node.

[0431] In this embodiment, during the handover preparation process, only the source network node and other candidate target network nodes need to establish a connection. Other candidate target network nodes automatically establish connections based on the XnAP ID indicated by the source network node, thus avoiding the interface signaling overhead caused by explicitly establishing logical connections between all candidate target network nodes.

[0432] The technical solution of the wireless communication method 300 in this application is described below through Examples 5 to 7.

[0433] Example 5, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN nodes 2 and 3 are candidate target network nodes. Specifically, NG-RAN node 1 can correspond to the fourth network node mentioned above, NG-RAN node 2 can correspond to the fifth network node mentioned above, and NG-RAN node 3 can correspond to the sixth network node mentioned above; or, NG-RAN node 1 can correspond to the fourth network node mentioned above, NG-RAN node 2 can correspond to the sixth network node mentioned above, and NG-RAN node 3 can correspond to the fifth network node mentioned above. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN node 2 and NG-RAN node 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 5, during handover preparation, NG-RAN node 1 can send the XnAP IDs allocated to the UE by each candidate NG-RAN node to the candidate NG-RAN node at the other end of the logical connection to establish a logical connection. The process of Example 5 can be as follows: Figure 11 As shown, it may specifically include some or all of the steps in S5-1 to S5-6 below.

[0434] S5-1. NG-RAN node 1 sends a handover request message 1 to NG-RAN node 2, wherein the handover request message 1 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0435] S5-2. NG-RAN node 2 sends a handover request confirmation message 1 to NG-RAN node 1, wherein the handover request confirmation message 1 includes the candidate cell configuration provided by NG-RAN node 2.

[0436] S5-3. NG-RAN node 1 sends a handover request message 2 to NG-RAN node 3, wherein the handover request message 2 is used to request NG-RAN node 2 to provide candidate cell configuration.

[0437] S5-4. NG-RAN node 3 sends a handover request confirmation message 2 to NG-RAN node 1, wherein the handover request confirmation message 2 includes candidate cell configurations provided by NG-RAN node 3.

[0438] S5-5. NG-RAN node 1 sends message 51 to NG-RAN node 2;

[0439] The message 51 includes at least one of the following:

[0440] NG-RAN node 3 assigns NG-RAN node UE XnAP ID 1 to the UE, where NG-RAN node UEXnAP ID 1 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 3 assigned by NG-RAN node 3 to the UE;

[0441] Global NG-RAN Node ID of NG-RAN Node 3.

[0442] It should be noted that message 51 can correspond to the fifth message mentioned above.

[0443] It should be noted that the identifier corresponding to the logical connection between NG-RAN Node 1 and NG-RAN Node 3 allocated by NG-RAN Node 3 to the UE can be the same as the identifier corresponding to the logical connection between NG-RAN Node 2 and NG-RAN Node 3 allocated by NG-RAN Node 3 to the UE.

[0444] S5-6. NG-RAN node 1 sends message 52 to NG-RAN node 3;

[0445] The message 52 includes at least one of the following:

[0446] NG-RAN node UE XnAP ID 2 is assigned to the UE by NG-RAN node 2, where NG-RAN node UEXnAP ID 2 is the identifier corresponding to the logical connection between NG-RAN node 1 and NG-RAN node 2 assigned to the UE by NG-RAN node 2;

[0447] The Global NG-RAN Node ID of NG-RAN Node 2.

[0448] It should be noted that message 52 can correspond to the fifth message mentioned above.

[0449] It should be noted that the identifier corresponding to the logical connection between NG-RAN Node 1 and NG-RAN Node 2 allocated by NG-RAN Node 2 for the UE can be the same as the identifier corresponding to the logical connection between NG-RAN Node 2 and NG-RAN Node 3 allocated by NG-RAN Node 2 for the UE.

[0450] It should be noted that the order of S5-5 and S5-6 is not limited in this embodiment.

[0451] In Example 5, when NG-RAN Node 2 and NG-RAN Node 3 subsequently transmit UE-associated signalling, they carry at least one of the following:

[0452] The identifier corresponding to the logical connection between NG-RAN Node 2 and NG-RAN Node 3 allocated to the UE by NG-RAN Node 2;

[0453] The identifier corresponding to the logical connection between NG-RAN Node 2 and NG-RAN Node 3 assigned to the UE by NG-RAN Node 3;

[0454] The identifier corresponding to the logical connection between NG-RAN Node 1 and NG-RAN Node 2 assigned to the UE by NG-RAN Node 1;

[0455] The identifier corresponding to the logical connection between NG-RAN Node 1 and NG-RAN Node 3 assigned to the UE by NG-RAN Node 1.

[0456] Optionally, message 51 may be carried by the handover request message 1, and / or message 52 may be carried by the handover request message 2.

[0457] Therefore, in Embodiment 5, during the handover preparation process, only the source NG-RAN node needs to establish a connection with other NG-RAN nodes. Other NG-RAN nodes can automatically establish logical connections based on the XnAP ID indicated by the source NG-RAN node, thus avoiding the interface signaling overhead caused by explicitly establishing logical connections between all NG-RAN nodes.

[0458] Example 6, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN node 2 and NG-RAN node 3 are candidate target network nodes. Specifically, NG-RAN node 1 can correspond to the aforementioned fourth network node, and NG-RAN node 3 can correspond to the aforementioned fifth network node. It should be understood that this embodiment does not limit the number of candidate target network nodes, that is, it can also include other candidate target network nodes besides NG-RAN node 2 and NG-RAN node 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 6, after the handover is completed, the source NG-RAN node (i.e., NG-RAN node 1) notifies other NG-RAN nodes of the identifier of the UE's current serving cell. The process of Example 6 can be as follows: Figure 12 As shown, it may specifically include some or all of the steps in S6-1 to S6-3 below.

[0459] S6-1. Switching preparation and switching execution process.

[0460] S6-2. After the UE switches to NG-RAN node 2, NG-RAN node 2 sends a handover completion message to NG-RAN node 1.

[0461] S6-3. NG-RAN node 1 sends message 61 to NG-RAN node 3;

[0462] The message 61 includes the identifier of the UE's current serving cell, such as NR CGI.

[0463] It should be noted that message 61 can correspond to the fifth message mentioned above.

[0464] It should be noted that the identifier of the UE's current serving cell can also be replaced with the identifier of the NG-RAN node where the UE is currently camped; this embodiment does not limit this.

[0465] Therefore, in Example 6, after the handover is completed, the source NG-RAN node notifies other NG-RAN nodes of the identifier of the UE's current serving cell, so that when other NG-RAN nodes need to change or release the UE configuration, they can send a message to the NG-RAN node where the UE is currently located.

[0466] Example 7, taking NG-RAN nodes as an example, where NG-RAN node 1 is the source network node, and NG-RAN node 2 and NG-RAN node 3 are candidate target network nodes. Specifically, NG-RAN node 1 can correspond to the aforementioned fourth network node, and NG-RAN node 3 can correspond to the aforementioned fifth network node. It should be understood that this example does not limit the number of candidate target network nodes, that is, it can also include other candidate target nodes besides NG-RAN node 2 and NG-RAN node 3. Optionally, the NG-RAN node can be a gNB (i.e., a CU-DU integrated base station) or a CU (a CU-DU separated base station). In Example 7, when a handover is initiated, the source NG-RAN node (i.e., NG-RAN node 1) notifies other NG-RAN nodes of the identifier of the UE's current serving cell. The process of Example 7 can be as follows: Figure 13 As shown, it may specifically include some or all of the steps in S7-1 to S7-4 below.

[0467] S7-1. Switching preparation process.

[0468] S7-2.NG-RAN node 1 sends an LTM handover command to the UE.

[0469] S7-3. NG-RAN node 1 sends message 71 to NG-RAN node 2;

[0470] The message 71 includes the identifier of the target cell to which the UE is preparing to hand over, such as NR CGI.

[0471] S7-4. NG-RAN node 1 sends message 72 to NG-RAN node 3;

[0472] The message 72 includes the identifier of the target cell to which the UE is preparing to hand over, such as NR CGI.

[0473] It should be noted that message 72 can correspond to the fifth message mentioned above.

[0474] S7-5. Switching execution and switch completion process.

[0475] Therefore, in Example 7, when a handover is initiated, the source NG-RAN node notifies other NG-RAN nodes of the identifier of the UE's current serving cell, so that when other NG-RAN nodes need to change or release the UE configuration, they can send a message to the NG-RAN node where the UE is currently located.

[0476] The wireless communication method provided in this application can be executed by a wireless communication device. This application uses an example of a wireless communication device executing the wireless communication method to illustrate the wireless communication device provided in this application.

[0477] This application provides a wireless communication device. As an example, the wireless communication device may be a communication equipment or a component within a communication equipment, such as a chip. The communication equipment may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0478] The wireless communication device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0479] When the wireless communication device is a first network node or a component of the first network node, see [reference needed]. Figure 14 The wireless communication device 400 includes:

[0480] Sending module 401 is used to send the first message to the second network node;

[0481] The first message includes at least one of the following:

[0482] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal;

[0483] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0484] The identifier of the third network node;

[0485] The identifier of the terminal;

[0486] The identifier of the serving cell of the terminal;

[0487] Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the wireless communication device 400 and the third network node.

[0488] In some embodiments, the wireless communication device 400 further includes:

[0489] The receiving module 402 is used to receive a second message from the second network node;

[0490] The second message includes at least one of the following:

[0491] The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal;

[0492] The identifier of the third network node.

[0493] In some embodiments, the second identifier is the same as the third identifier.

[0494] In some embodiments, the first message further includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to a third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the wireless communication device 400 and the second network node;

[0495] The second message also includes at least one of the following:

[0496] The fourth identifier;

[0497] The fifth identifier is the identifier corresponding to the third logical connection allocated by the second network node to the terminal.

[0498] In some embodiments, before the wireless communication device 400 sends the first message to the second network node, the receiving module 402 is further configured to receive a third message from the third network node;

[0499] The third message includes at least one of the following:

[0500] The first instruction information is used to instruct the wireless communication device 400 to establish a logical connection with the second network node;

[0501] The second indication information is used to indicate that the second network node is a candidate target network node;

[0502] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0503] The first identifier.

[0504] In some embodiments, the sending module 401 is further configured to send a fourth message to the third network node;

[0505] The fourth message is used to indicate that the third message has been successfully received.

[0506] In some embodiments, the third message is received by the wireless communication device 400 after receiving a handover request message from the third network node, or the third message is a handover request message received by the wireless communication device 400 from the third network node.

[0507] In some embodiments, the wireless communication device 400 is a candidate target network node, the second network node is a candidate target network node, and the third network node is a source network node.

[0508] In some embodiments, the first message is sent by the wireless communication device 400 before the cell handover is completed; or, the first message is sent by the wireless communication device 400 after the cell handover is completed.

[0509] In some embodiments, the wireless communication device 400 is a target network node, the second network node is a candidate target network node, and the third network node is a source network node.

[0510] When the wireless communication device is a second network node or a component of a second network node, see [link to relevant documentation]. Figure 15 The wireless communication device 500 includes:

[0511] The receiving module 501 is used to receive a first message from the first network node;

[0512] The first message includes at least one of the following:

[0513] The first identifier is the identifier corresponding to the first logical connection allocated by the wireless communication device 500 to the terminal.

[0514] The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node;

[0515] The identifier of the third network node;

[0516] The identifier of the terminal;

[0517] The identifier of the serving cell of the terminal;

[0518] Wherein, the first logical connection is the logical connection between the wireless communication device 500 and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

[0519] In some embodiments, the wireless communication device 500 further includes:

[0520] Sending module 502 is used to send a second message to the first network node;

[0521] The second message includes at least one of the following:

[0522] The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal;

[0523] The identifier of the third network node.

[0524] In some embodiments, the second identifier is the same as the third identifier.

[0525] In some embodiments, the first message further includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to a third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the first network node and the wireless communication device 500.

[0526] The second message also includes at least one of the following:

[0527] The fourth identifier;

[0528] The fifth identifier is the identifier corresponding to the third logical connection allocated by the wireless communication device 500 to the terminal.

[0529] In some embodiments, the first network node is a candidate target network node, the wireless communication device 500 is a candidate target network node, and the third network node is a source network node.

[0530] In some embodiments, the first message is sent by the first network node before the cell handover is completed; or, the first message is sent by the first network node after the cell handover is completed.

[0531] In some embodiments, the first network node is a target network node, the wireless communication device 500 is a candidate target network node, and the third network node is a source network node.

[0532] When the wireless communication device is a third network node or a component of a third network node, see [link to relevant documentation]. Figure 16 The wireless communication device 600 includes:

[0533] Sending module 601 is used to send a third message to the first network node;

[0534] The third message includes at least one of the following:

[0535] The first instruction information is used to instruct the first network node and the second network node to establish a logical connection;

[0536] The second indication information is used to indicate that the second network node is a candidate target network node;

[0537] A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node;

[0538] The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the wireless communication device 600.

[0539] In some embodiments, the third message is sent by the wireless communication device 600 after receiving a handover request confirmation message from the first network node, or the third message is a handover request message sent by the wireless communication device 600 to the first network node.

[0540] In some embodiments, the first network node is a candidate target network node, the second network node is a candidate target network node, and the wireless communication device 600 is a source network node.

[0541] Therefore, in this embodiment, the first network node sends a first message to the second network node. The second network node can assign an identifier corresponding to the logical connection between the first and second network nodes to the terminal based on a first identifier, and / or, the second network node can determine the terminal's identifier based on a second identifier and the identifier of a third network node, and / or, the second network node can determine the terminal's current serving network node based on the identifier of the terminal's serving cell, so that non-terminal serving network nodes can proactively initiate candidate cell configuration changes or releases. Thus, when the terminal performs continuous inter-CU LTM, at least two candidate network nodes (such as candidate CUs) can establish a logical connection, and candidate network nodes (such as candidate CUs) can know the terminal's current serving network node (such as serving CU), thereby non-terminal serving network nodes (such as non-serving CUs) can proactively initiate candidate cell configuration changes or releases.

[0542] When the wireless communication device is a fourth network node or a component of a fourth network node, see [link to relevant documentation]. Figure 17 The wireless communication device 700 includes:

[0543] Sending module 701 is used to send a fifth message to the fifth network node;

[0544] The fifth message includes one of the following: first information, second information;

[0545] The first information includes one of the following:

[0546] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0547] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0548] The second information includes at least one of the following:

[0549] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0550] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0551] The identifier of the sixth network node;

[0552] The fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the wireless communication device 700 and the sixth network node.

[0553] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the serving cell of the terminal and / or the identifier of the serving network node, the fifth message is sent by the wireless communication device 700 after the cell handover is completed.

[0554] In some embodiments, the wireless communication device 700 is a source network node, and the fifth network node is a candidate target network node.

[0555] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the wireless communication device 700 after sending a cell handover command, or the fifth message is sent by the wireless communication device 700 after receiving a cell handover command sending instruction.

[0556] In some embodiments, the wireless communication device 700 is a source network node, and the fifth network node is a candidate target network node other than the target network node.

[0557] In some embodiments, where the fifth message includes the second information and the second information includes the fifth identifier, the wireless communication device 700 further includes a receiving module 702 before the wireless communication device 700 sends the fifth message to the fifth network node.

[0558] The sending module 701 is further configured to send a sixth message to the sixth network node, the sixth message being used to indicate that the fifth network node is a candidate target network node;

[0559] The receiving module 702 is used to receive a seventh message from the sixth network node;

[0560] The seventh message includes at least one of the following:

[0561] The fifth identifier, the identifier of the sixth network node.

[0562] In some embodiments, when the fifth message includes the second information, the fifth message is sent by the wireless communication device 700 after receiving a handover request confirmation message from the fifth network node, or the fifth message is a handover request message sent by the wireless communication device 700 to the fifth network node.

[0563] In some embodiments, when the fifth message includes the second information, the messages exchanged between the fifth network node and the sixth network node include at least one of the following:

[0564] The fifth identifier;

[0565] The seventh identifier is the identifier corresponding to the fourth logical connection allocated by the fifth network node to the terminal;

[0566] The eighth identifier is the identifier corresponding to the sixth logical connection allocated by the wireless communication device 700 to the terminal, and the sixth logical connection is the logical connection between the wireless communication device 700 and the fifth network node;

[0567] The ninth identifier is the identifier corresponding to the fifth logical connection allocated by the wireless communication device 700 to the terminal.

[0568] In some embodiments, the wireless communication device 700 is a source network node, the fifth network node is a candidate target network node, and the sixth network node is a candidate target network node.

[0569] When the wireless communication device is a fifth network node or a component of a fifth network node, see [link to relevant documentation]. Figure 18 The wireless communication device 800 includes:

[0570] The receiving module 801 is used to receive the fifth message from the fourth network node;

[0571] The fifth message includes one of the following: first information, second information;

[0572] The first information includes one of the following:

[0573] The identifier of the serving cell and / or the identifier of the serving network node of the terminal;

[0574] The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node;

[0575] The second information includes at least one of the following:

[0576] The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node;

[0577] The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal;

[0578] The identifier of the sixth network node;

[0579] The fourth logical connection is the logical connection between the wireless communication device 800 and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

[0580] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the serving cell of the terminal and / or the identifier of the serving network node, the fifth message is sent by the fourth network node after the cell handover is completed.

[0581] In some embodiments, the fourth network node is a source network node, and the wireless communication device 800 is a candidate target network node.

[0582] In some embodiments, where the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the fourth network node after sending the cell handover command, or the fifth message is sent by the fourth network node after receiving the cell handover command sending instruction.

[0583] In some embodiments, the fourth network node is a source network node, and the wireless communication device 800 is a candidate target network node other than the target network node.

[0584] In some embodiments, when the fifth message includes the second information, the fifth message is received by the wireless communication device 800 after sending a handover request confirmation message to the fourth network node, or the fifth message is a handover request message received by the wireless communication device 800 from the fourth network node.

[0585] In some embodiments, when the fifth message includes the second information, the messages exchanged between the wireless communication device 800 and the sixth network node include at least one of the following:

[0586] The fifth identifier;

[0587] The seventh identifier is the identifier corresponding to the fourth logical connection allocated by the fifth network node to the terminal;

[0588] The eighth identifier is the identifier corresponding to the sixth logical connection allocated by the fourth network node to the terminal, and the sixth logical connection is the logical connection between the fourth network node and the wireless communication device 800;

[0589] The ninth identifier is the identifier corresponding to the fifth logical connection allocated by the fourth network node to the terminal.

[0590] In some embodiments, the fourth network node is the source network node, the wireless communication device 800 is the candidate target network node, and the sixth network node is the candidate target network node.

[0591] Therefore, in this embodiment, the fourth network node sends a fifth message to the fifth network node. The fifth network node can determine the current serving network node of the terminal based on the first information, so that the serving network node of the non-terminal can actively initiate candidate cell configuration changes or releases. Alternatively, the fifth network node can establish a logical connection between the fifth network node and the sixth network node based on the second information. Thus, when the terminal performs continuous inter-CU LTM, at least two candidate network nodes (such as candidate CUs) can establish a logical connection, and the candidate network nodes (such as candidate CUs) can know the current serving network node of the terminal (such as the serving CU), thereby allowing the non-terminal serving network node (such as the non-serving CU) to actively initiate candidate cell configuration changes or releases.

[0592] The wireless communication device provided in this application embodiment can achieve... Figures 5 to 13 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0593] like Figure 19As shown in the figure, this application embodiment also provides a communication device 900, including a processor 901 and a memory 902, wherein the memory 902 stores a program or instructions that can be executed on the processor 901.

[0594] For example, when the communication device 900 is the first network node, the program or instruction executed by the processor 901 implements the various steps executed by the first network node in the above wireless communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0595] For example, when the communication device 900 is a second network node, the program or instruction executed by the processor 901 implements the various steps executed by the second network node in the above wireless communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0596] For example, when the communication device 900 is a third network node, the program or instruction executed by the processor 901 implements the various steps executed by the third network node in the above wireless communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0597] For example, when the communication device 900 is the fourth network node, the program or instruction executed by the processor 901 implements the various steps executed by the fourth network node in the above wireless communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0598] For example, when the communication device 900 is the fifth network node, the program or instruction executed by the processor 901 implements the various steps executed by the fifth network node in the above wireless communication method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0599] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the terminal in the method embodiment of this application. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 20 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0600] The terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0601] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 20 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0602] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit 10041 and a microphone 10042. The graphics processing unit 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0603] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1001 can transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0604] The memory 1009 can be used to store software programs or instructions, as well as various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0605] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0606] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant descriptions of wireless communication method 200 and / or wireless communication method 300 in the method embodiment, and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0607] This application embodiment also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example...Figures 5 to 13 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the network-side device method embodiment described above. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0608] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 14 The wireless communication device 400 shown, or the network-side device, can be... Figure 15 The wireless communication device 500 shown, or the network-side device, can be... Figure 16 The wireless communication device 600 shown, or the network-side device, can be... Figure 17 The wireless communication device 700 shown, or the network-side device, can be... Figure 18 The wireless communication device 800 shown.

[0609] like Figure 21 As shown, the network-side device 1100 includes: an antenna 111, a radio frequency (RF) device 112, a baseband device 113, a processor 114, and a memory 115. The antenna 111 is connected to the RF device 112. In the uplink direction, the RF device 112 receives information through the antenna 111 and transmits the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be transmitted and sends it to the RF device 112. The RF device 112 processes the received information and transmits it through the antenna 111.

[0610] The method executed on the network-side device side in the above embodiments can be implemented in the baseband device 113, which includes a baseband processor.

[0611] Baseband device 113 may include, for example, at least one baseband board on which multiple chips are disposed, such as Figure 21 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 115 via a bus interface to call the program in the memory 115 to execute the operation performed by the first network node as shown in the above method embodiment, or to execute the operation performed by the second network node as shown in the above method embodiment, or to execute the operation performed by the third network node as shown in the above method embodiment, or to execute the operation performed by the fourth network node as shown in the above method embodiment, or to execute the operation performed by the fifth network node as shown in the above method embodiment.

[0612] The network-side device may also include a network interface 116, such as a Common Public Radio Interface (CPRI).

[0613] Specifically, the network-side device 1100 in this application embodiment further includes: instructions or programs stored in memory 115 and executable on processor 114, wherein processor 114 calls the instructions or programs in memory 115 to execute. Figures 14 to 18 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0614] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described wireless communication method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0615] The processor is, in this embodiment, the processor in the first network node, the processor in the second network node, the processor in the third network node, the processor in the fourth network node, or the processor in the fifth network node. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0616] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described wireless communication method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0617] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0618] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described wireless communication method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0619] This application also provides a communication system, including: a first network node, a second network node, and a third network node. The first network node can be used to perform the steps executed by the first network node in the wireless communication method described above. The second network node can be used to perform the steps executed by the second network node in the wireless communication method described above. The third network node can be used to perform the steps executed by the third network node in the wireless communication method described above.

[0620] This application also provides a communication system, including a fourth network node and a fifth network node. The fourth network node can be used to perform the steps executed by the fourth network node in the wireless communication method described above, and the fifth network node can be used to perform the steps executed by the fifth network node in the wireless communication method described above.

[0621] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0622] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0623] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A wireless communication method, characterized in that, include: The first network node sends the first message to the second network node; The first message includes at least one of the following: The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal; The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node; The identifier of the third network node; The identifier of the terminal; The identifier of the serving cell of the terminal; Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

2. The method according to claim 1, characterized in that, The method further includes: The first network node receives the second message from the second network node; The second message includes at least one of the following: The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal; The identifier of the third network node.

3. The method according to claim 2, characterized in that, The second identifier is the same as the third identifier.

4. The method according to claim 2 or 3, characterized in that, The first message also includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to the third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the first network node and the second network node; The second message also includes at least one of the following: The fourth identifier; The fifth identifier is the identifier corresponding to the third logical connection allocated by the second network node to the terminal.

5. The method according to any one of claims 1 to 4, characterized in that, Before the first network node sends the first message to the second network node, the method further includes: The first network node receives a third message from the third network node; The third message includes at least one of the following: The first instruction information is used to instruct the first network node and the second network node to establish a logical connection; The second indication information is used to indicate that the second network node is a candidate target network node; A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node; The first identifier.

6. The method according to claim 5, characterized in that, The method further includes: The first network node sends a fourth message to the third network node; The fourth message is used to indicate that the third message has been successfully received.

7. The method according to claim 5 or 6, characterized in that, The third message is received by the first network node after receiving the handover request message from the third network node, or the third message is a handover request message received by the first network node from the third network node.

8. The method according to any one of claims 2 to 7, characterized in that, The first network node is a candidate target network node, the second network node is a candidate target network node, and the third network node is a source network node.

9. The method according to any one of claims 1 to 4, characterized in that, The first message was sent by the first network node before the cell handover was completed; or, The first message is sent by the first network node after the cell handover is completed.

10. The method according to claim 9, characterized in that, The first network node is the target network node, the second network node is the candidate target network node, and the third network node is the source network node.

11. A wireless communication method, characterized in that, include: The second network node receives the first message from the first network node; The first message includes at least one of the following: The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal; The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node; The identifier of the third network node; The identifier of the terminal; The identifier of the serving cell of the terminal; Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

12. The method according to claim 11, characterized in that, The method further includes: The second network node sends a second message to the first network node; The second message includes at least one of the following: The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal; The identifier of the third network node.

13. The method according to claim 12, characterized in that, The first message also includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to the third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the first network node and the second network node; The second message also includes at least one of the following: The fourth identifier; The fifth identifier is the identifier corresponding to the third logical connection allocated by the second network node to the terminal.

14. The method according to any one of claims 11 to 13, characterized in that, The first message was sent by the first network node before the cell handover was completed; or, The first message is sent by the first network node after the cell handover is completed.

15. A wireless communication method, characterized in that, include: The third network node sends a third message to the first network node; The third message includes at least one of the following: The first instruction information is used to instruct the first network node and the second network node to establish a logical connection; The second indication information is used to indicate that the second network node is a candidate target network node; A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node; The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the third network node.

16. The method according to claim 15, characterized in that, The third message is sent by the third network node after receiving the handover request confirmation message from the first network node, or the third message is a handover request message sent by the third network node to the first network node.

17. A wireless communication method, characterized in that, include: The fourth network node sends a fifth message to the fifth network node; The fifth message includes one of the following: first information, second information; The first information includes one of the following: The identifier of the serving cell and / or the identifier of the serving network node of the terminal; The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node; The second information includes at least one of the following: The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node; The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal; The identifier of the sixth network node; Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

18. The method according to claim 17, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the serving cell of the terminal and / or the identifier of the serving network node, then the fifth message is sent by the fourth network node after the cell handover is completed.

19. The method according to claim 18, characterized in that, The fourth network node is the source network node, and the fifth network node is the candidate target network node.

20. The method according to claim 17, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the fourth network node after sending the cell handover command, or the fifth message is sent by the fourth network node after receiving the cell handover command sending instruction.

21. The method according to claim 20, characterized in that, The fourth network node is the source network node, and the fifth network node is a candidate target network node other than the target network node.

22. The method according to claim 17, characterized in that, If the fifth message includes the second information, and the second information includes the fifth identifier, the method further includes, before the fourth network node sends the fifth message to the fifth network node: The fourth network node sends a sixth message to the sixth network node, the sixth message being used to indicate that the fifth network node is a candidate target network node; The fourth network node receives the seventh message from the sixth network node; The seventh message includes at least one of the following: The fifth identifier, the identifier of the sixth network node.

23. The method according to claim 17 or 22, characterized in that, If the fifth message includes the second information, the fifth message is sent by the fourth network node after receiving the handover request confirmation message from the fifth network node, or the fifth message is a handover request message sent by the fourth network node to the fifth network node.

24. The method according to claim 17, 22 or 23, characterized in that, When the fifth message includes the second information, the messages exchanged between the fifth network node and the sixth network node include at least one of the following: The fifth identifier; The seventh identifier is the identifier corresponding to the fourth logical connection allocated by the fifth network node to the terminal; The eighth identifier is the identifier corresponding to the sixth logical connection allocated by the fourth network node to the terminal, and the sixth logical connection is the logical connection between the fourth network node and the fifth network node; The ninth identifier is the identifier corresponding to the fifth logical connection allocated by the fourth network node to the terminal.

25. The method according to claim 17, 22, 23 or 24, characterized in that, The fourth network node is the source network node, the fifth network node is the candidate target network node, and the sixth network node is the candidate target network node.

26. A wireless communication method, characterized in that, include: The fifth network node receives the fifth message from the fourth network node; The fifth message includes one of the following: first information, second information; The first information includes one of the following: The identifier of the serving cell and / or the identifier of the serving network node of the terminal; The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node; The second information includes at least one of the following: The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node; The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal; The identifier of the sixth network node; Wherein, the fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

27. The method according to claim 26, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the serving cell of the terminal and / or the identifier of the serving network node, then the fifth message is sent by the fourth network node after the cell handover is completed.

28. The method according to claim 26, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the fourth network node after sending the cell handover command, or the fifth message is sent by the fourth network node after receiving the cell handover command sending instruction.

29. The method according to claim 26, characterized in that, If the fifth message includes the second information, the fifth message is received by the fifth network node after sending a handover request confirmation message to the fourth network node, or the fifth message is a handover request message received by the fifth network node from the fourth network node.

30. The method according to claim 26 or 29, characterized in that, When the fifth message includes the second information, the messages exchanged between the fifth network node and the sixth network node include at least one of the following: The fifth identifier; The seventh identifier is the identifier corresponding to the fourth logical connection allocated by the fifth network node to the terminal; The eighth identifier is the identifier corresponding to the sixth logical connection allocated by the fourth network node to the terminal, and the sixth logical connection is the logical connection between the fourth network node and the fifth network node; The ninth identifier is the identifier corresponding to the fifth logical connection allocated by the fourth network node to the terminal.

31. A wireless communication device, characterized in that, include: The sending module is used to send the first message to the second network node; The first message includes at least one of the following: The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal; The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node; The identifier of the third network node; The identifier of the terminal; The identifier of the serving cell of the terminal; Wherein, the first logical connection is the logical connection between the second network node and the third network node, and the second logical connection is the logical connection between the wireless communication device and the third network node.

32. The apparatus according to claim 31, characterized in that, The wireless communication device further includes: The receiving module is used to receive a second message from the second network node; The second message includes at least one of the following: The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal; The identifier of the third network node.

33. The apparatus according to claim 32, characterized in that, The first message also includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to the third logical connection allocated by the wireless communication device to the terminal, and the third logical connection is a logical connection between the wireless communication device and the second network node; The second message also includes at least one of the following: The fourth identifier; The fifth identifier is the identifier corresponding to the third logical connection allocated by the second network node to the terminal.

34. The apparatus according to any one of claims 31 to 33, characterized in that, Before the wireless communication device sends the first message to the second network node, the wireless communication device further includes: A receiving module is configured to receive a third message from the third network node; The third message includes at least one of the following: The first instruction information is used to instruct the wireless communication device to establish a logical connection with the second network node; The second indication information is used to indicate that the second network node is a candidate target network node; A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node; The first identifier.

35. The apparatus according to claim 34, characterized in that, The third message is received by the wireless communication device after receiving the handover request message from the third network node, or the third message is a handover request message received by the wireless communication device from the third network node.

36. The apparatus according to any one of claims 31 to 33, characterized in that, The first message is sent by the wireless communication device before the cell handover is completed; or, The first message is sent by the wireless communication device after the cell handover is completed.

37. A wireless communication device, characterized in that, include: The receiving module is used to receive the first message from the first network node; The first message includes at least one of the following: The first identifier is the identifier corresponding to the first logical connection allocated by the wireless communication device to the terminal; The second identifier is the identifier corresponding to the second logical connection allocated to the terminal by the third network node; The identifier of the third network node; The identifier of the terminal; The identifier of the serving cell of the terminal; Wherein, the first logical connection is the logical connection between the wireless communication device and the third network node, and the second logical connection is the logical connection between the first network node and the third network node.

38. The apparatus according to claim 37, characterized in that, The wireless communication device further includes: The sending module is used to send a second message to the first network node; The second message includes at least one of the following: The third identifier is the identifier corresponding to the first logical connection allocated by the third network node to the terminal; The identifier of the third network node.

39. The apparatus according to claim 38, characterized in that, The first message also includes a fourth identifier, wherein the fourth identifier is an identifier corresponding to the third logical connection allocated by the first network node to the terminal, and the third logical connection is a logical connection between the first network node and the wireless communication device; The second message also includes at least one of the following: The fourth identifier; The fifth identifier is the identifier corresponding to the third logical connection allocated by the wireless communication device to the terminal.

40. The apparatus according to claim 37, characterized in that, The first message was sent by the first network node before the cell handover was completed; or, The first message is sent by the first network node after the cell handover is completed.

41. A wireless communication device, characterized in that, include: The sending module is used to send a third message to the first network node; The third message includes at least one of the following: The first instruction information is used to instruct the first network node and the second network node to establish a logical connection; The second indication information is used to indicate that the second network node is a candidate target network node; A candidate cell identifier list, wherein the candidate cell identifier list includes the identifier of the cell corresponding to the second network node; The first identifier is the identifier corresponding to the first logical connection allocated by the second network node to the terminal, and the first logical connection is the logical connection between the second network node and the wireless communication device.

42. The apparatus according to claim 41, characterized in that, The third message is sent by the wireless communication device after receiving the handover request confirmation message from the first network node, or the third message is a handover request message sent by the wireless communication device to the first network node.

43. A wireless communication device, characterized in that, include: The sending module is used to send the fifth message to the fifth network node; The fifth message includes one of the following: first information, second information; The first information includes one of the following: The identifier of the serving cell and / or the identifier of the serving network node of the terminal; The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node; The second information includes at least one of the following: The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node; The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal; The identifier of the sixth network node; The fourth logical connection is the logical connection between the fifth network node and the sixth network node, and the fifth logical connection is the logical connection between the wireless communication device and the sixth network node.

44. The apparatus according to claim 43, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the serving cell and / or the identifier of the serving network node of the terminal, the fifth message is sent by the wireless communication device after the cell handover is completed.

45. The apparatus according to claim 43, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the wireless communication device after sending the cell handover command, or the fifth message is sent by the wireless communication device after receiving the cell handover command sending instruction.

46. ​​The apparatus according to claim 43, characterized in that, If the fifth message includes the second information and the second information includes the fifth identifier, the wireless communication device further includes a receiving module before the wireless communication device sends the fifth message to the fifth network node. The sending module is also configured to send a sixth message to the sixth network node, the sixth message being used to indicate that the fifth network node is a candidate target network node; The receiving module is used to receive a seventh message from the sixth network node; The seventh message includes at least one of the following: The fifth identifier, the identifier of the sixth network node.

47. The apparatus according to claim 43 or 46, characterized in that, If the fifth message includes the second information, the fifth message is sent by the wireless communication device after receiving a handover request confirmation message from the fifth network node, or the fifth message is a handover request message sent by the wireless communication device to the fifth network node.

48. A wireless communication device, characterized in that, include: The receiving module is used to receive the fifth message from the fourth network node; The fifth message includes one of the following: first information, second information; The first information includes one of the following: The identifier of the serving cell and / or the identifier of the serving network node of the terminal; The identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node; The second information includes at least one of the following: The fifth identifier is the identifier corresponding to the fourth logical connection allocated to the terminal by the sixth network node; The sixth identifier is the identifier corresponding to the fifth logical connection allocated by the sixth network node to the terminal; The identifier of the sixth network node; The fourth logical connection is the logical connection between the wireless communication device and the sixth network node, and the fifth logical connection is the logical connection between the fourth network node and the sixth network node.

49. The apparatus according to claim 48, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the serving cell of the terminal and / or the identifier of the serving network node, then the fifth message is sent by the fourth network node after the cell handover is completed.

50. The apparatus according to claim 48, characterized in that, If the fifth message includes the first information, and the first information includes the identifier of the target cell to which the terminal is preparing to hand over and / or the identifier of the target network node, the fifth message is sent by the fourth network node after sending the cell handover command, or the fifth message is sent by the fourth network node after receiving the cell handover command sending instruction.

51. The apparatus according to claim 48, characterized in that, If the fifth message includes the second information, the fifth message is received by the wireless communication device after sending a handover request confirmation message to the fourth network node, or the fifth message is a handover request message received by the wireless communication device from the fourth network node.

52. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the wireless communication method as described in any one of claims 1 to 30.

53. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the wireless communication method as described in any one of claims 1 to 30.

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