Communication method and device, terminal, network side equipment, medium and computer program product

Abstract

The invention discloses a communication method and device, a terminal, network side equipment, a medium and a computer program product, and belongs to the technical field of communication, and the communication method comprises the steps that the terminal obtains deployment information of at least one network object, and the at least one network object comprises at least one of at least one LTM cell and at least one LTM candidate cell, at least one TRP, at least one beam; the terminal executes a first operation based on the deployment information; wherein the first operation comprises at least one of the following steps: sending first information, and the first information is used for indicating the LTM cell expected to be switched; performing condition LTM switching; and carrying out continuous LTM switching.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a communication method, device, terminal, network-side equipment, medium, and computer program product. Background Technology

[0002] Typically, as a terminal moves, it needs to continuously perform LTM handovers. To ensure network service quality, when the terminal is in a high-speed moving state, such as when a user is carrying the terminal on a high-speed train, the terminal can camp on a high-speed cell under a High Speed ​​Dedicated Network (HSDN) to obtain better communication services even at high speeds. Typically, high-speed cells under HSDN are equipped with Transmission and Reception Points (TRPs) or Layer 1 / L2-Triggered Mobility (LTM) configurations, allowing the terminal to handover to a suitable LTM cell.

[0003] Currently, the access network of New Radio (NR) systems splits the next-generation Node B (gNB) into a Centralized Unit (CU) and a Distributed Unit (DU). During LTM handover, the CU can pre-configure the terminal with the corresponding candidate cells for LTM configuration, and then the DU sends an LTM handover command to the terminal. This allows the terminal to handover to a suitable cell based on the LTM handover command and pre-configured Radio Resource Control (RRC).

[0004] However, since LTM handover may involve ping-pong handovers or missed handovers between multiple LTM cells, the terminal communication performance after LTM handover may be poor. Summary of the Invention

[0005] This application provides a communication method, apparatus, terminal, network-side device, medium, and computer program product that can improve the communication performance and quality of the terminal.

[0006] In a first aspect, a communication method is provided, executed by a terminal, the method comprising: the terminal acquiring deployment information of at least one network object, the at least one network object including at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, at least one beam; the terminal performing a first operation based on the deployment information; wherein the first operation includes at least one of the following: sending first information, the first information being used to indicate the LTM cell to which handover is desired; conditional LTM handover; continuous LTM handover.

[0007] In a second aspect, a communication method is provided, performed by a first network-side device, the method comprising: the first network-side device sending deployment information of at least one network object to a terminal, the at least one network object including at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, and at least one beam.

[0008] Thirdly, a communication apparatus is provided, comprising: a processing module; the processing module being configured to acquire deployment information of at least one network object, the at least one network object including at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, at least one beam; the processing module being further configured to perform a first operation based on the deployment information; wherein the first operation includes at least one of the following: transmitting first information, the first information being used to indicate the LTM cell to be switched; conditional LTM switching; continuous LTM switching.

[0009] Fourthly, a communication device is provided, comprising: a transmitting module; the transmitting module being configured to transmit deployment information of at least one network object to a terminal, the at least one network object comprising at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, and at least one beam.

[0010] Fifthly, a communication device is provided, which is configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0011] In a sixth aspect, a terminal is provided, the terminal 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.

[0012] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to perform a first operation based on deployment information, and the communication interface is used to obtain deployment information of at least one first cell.

[0013] Eighthly, a network-side device is provided, the network-side device 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.

[0014] In a ninth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to send deployment information of at least one first cell to a terminal.

[0015] In a tenth 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 implement the steps of the method described in the second aspect.

[0016] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0017] In a twelfth 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 to implement the method as described in the second aspect.

[0018] In a thirteenth 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 method as described in the first aspect, or to implement the method as described in the second aspect.

[0019] In this embodiment, the terminal obtains deployment information of at least one network object, which includes at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, and at least one beam. Based on the deployment information, the terminal performs a first operation, wherein the first operation includes at least one of the following: sending first information to indicate the LTM cell to which the terminal wishes to handover; conditional LTM handover; and continuous LTM handover. Through this scheme, since the terminal can obtain deployment information of at least one network object, when the terminal performs an LTM handover, it can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of the at least one network object. Thus, by performing the first operation, the terminal can handover to the LTM cell matching its own state. For example, during terminal movement, the terminal can accurately handover to the LTM cell located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality. Attached Figure Description

[0020] Figure 1 This is a possible structural diagram of the communication system involved in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of a switching process provided in an embodiment of this application;

[0022] Figure 3 This is a flowchart illustrating an LTM process provided in an embodiment of this application;

[0023] Figure 4 This is one of the flowcharts illustrating a communication method provided in an embodiment of this application;

[0024] Figure 5 This is one of the deployment diagrams of at least one LTM cell provided in the embodiments of this application;

[0025] Figure 6 This is a second schematic diagram of the deployment of at least one LTM cell provided in the embodiments of this application;

[0026] Figure 7 This is a second schematic flowchart of a communication method provided in an embodiment of this application;

[0027] Figure 8 This is a third schematic flowchart of a communication method provided in an embodiment of this application;

[0028] Figure 9 This is a fourth flowchart illustrating a communication method provided in an embodiment of this application;

[0029] Figure 10 This is the fifth flowchart illustrating a communication method provided in an embodiment of this application;

[0030] Figure 11 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0031] Figure 12 This is the seventh flowchart illustrating a communication method provided in an embodiment of this application;

[0032] Figure 13 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0033] Figure 14 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0034] Figure 15 This is a schematic diagram of the hardware structure of a communication device provided in an embodiment of this application;

[0035] Figure 16 This is a schematic diagram of the hardware structure of a terminal provided in an embodiment of this application;

[0036] Figure 17 This is a schematic diagram of the hardware structure of a network-side device provided in an embodiment of this application. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The 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 devices (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game consoles, personal computers (PCs), ATMs, or self-service machines, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, 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 this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein 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 (AS), 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 (NR Node 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 any specific technical terminology. 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.

[0042] Core network equipment, also known as core network nodes, core network functions, or core network elements, 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), Local NEF (or L-NEF), and Binding Support Function. Support Functions (BSF), Application Functions (AF), Location Management Functions (LMF), Gateway Mobile Location Centres (GMLC), and Network Data Analytics Functions (NWDAF), etc. It should be noted that this application embodiment 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 embodiment changes in subsequent protocol versions (e.g., 6G), it will still be within the scope of protection of this application.

[0043] 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).

[0044] The following explains some terms and nouns used in the embodiments of this application.

[0045] 1. HSDN: refers to High Speed ​​Private Network, which is a network deployed along roads (such as railway lines) to ensure network service quality for terminals on high-speed (such as high-speed rail) vehicles.

[0046] 2. High-speed movement state: This refers to the movement state where the terminal's speed is greater than or equal to a certain threshold (such as a threshold agreed upon in the protocol or a threshold indicated by the network-side equipment). For example, the movement state of the terminal when it is on a high-speed train (HST).

[0047] 3. Non-high-speed movement state: refers to the movement state in which the terminal's movement speed is less than a certain threshold (such as the threshold value agreed upon in the protocol or the threshold value indicated by the network-side equipment).

[0048] 4. Conditional Handover (CHO): This refers to the conditional handover process introduced to prevent the terminal from failing to handover due to the terminal's inability to receive handover command messages from the source node after the channel conditions of the source cell deteriorate.

[0049] 5. LTM Handover: This is a mobility management mechanism designed to reduce latency during cell handover for terminals while moving, ensuring a smoother user experience. Typically, LTM can change the serving cell for a terminal through Layer 1 and Layer 2 (L1 / L2) signaling, while maintaining or minimizing changes to upper-layer configurations. It can be understood that because LTM avoids reconfiguration at the RRC layer, it reduces downtime during handover, thereby reducing latency, overhead, and interruption time during handover.

[0050] LTM supports mobility handover within distributed units (DUs), central units (CUs), and between DUs. During LTM handover, the user plane can continue to connect to the unit being handed over, whenever possible (e.g., within a DU), without reconfiguration to avoid additional delays in data loss and recovery.

[0051] The following provides an exemplary description of the switching process, the LTM process, and the continuous LTM process.

[0052] like Figure 2 As shown, taking base station a as the source base station and base station b as the base station after handover as an example, the handover process may include the following steps S101 to S110.

[0053] Step S101: Base station a sends measurement configuration to the terminal.

[0054] Step S102: The terminal executes the measurement process and reports the measurement report.

[0055] Step S103: Base station a decides to switch.

[0056] Step S104: Base station a sends a handover request message to base station b.

[0057] Step S105: Base station b performs admission control.

[0058] Step S106: Base station b sends a handover request confirmation message to base station a.

[0059] Step S107: Base station a sends an RRC reconfiguration message containing a handover command to the terminal.

[0060] Step S108: The terminal performs the handover and sends an RRC reconfiguration complete message to base station b.

[0061] Step S109: Base station b sends a handover success message to base station a.

[0062] Step S110: Base station b instructs base station a to release the terminal UE context.

[0063] like Figure 3 As shown, the LTM process may include the following steps S201 to S210.

[0064] Step S201: The terminal sends a measurement report message to the network-side device.

[0065] Step S202: The network-side device decides to configure LTM and initiates LTM preparation.

[0066] Step S203: The terminal receives the RRC reconfiguration message sent by the network-side device.

[0067] The RRC reconfiguration message may contain at least one LTM candidate configuration.

[0068] Step S204: The terminal saves the LTM candidate configuration and sends an RRC reconfiguration complete message to the network-side device.

[0069] Step S205a: Before receiving the LTM cell switch command, the terminal performs downlink synchronization of the LTM candidate cell.

[0070] Step S205b: Before receiving the LTM cell handover command, the terminal performs uplink synchronization of the LTM candidate cell.

[0071] Step S206: The terminal performs Layer 1 (L1) measurement on the LTM candidate cells and sends an L1 measurement report to the network-side equipment.

[0072] Step S207: The network-side equipment decides to perform an LTM cell switch.

[0073] Step S208: The network-side device sends an LTM cell handover command to the terminal.

[0074] The LTM cell switch command may include a Media Access Control Element (MAC CE).

[0075] Understandably, the aforementioned MAC CE can be used to trigger an LTM cell switch. This command may include a target configuration ID indicating a candidate cell configuration index, a beam indicated by a Transport Configuration Indication (TCI) status or a beam indicated by downlink (DL) and uplink (UL) TCI status, and, if a timing advance command for a specific cell is available, may also include that timing advance command.

[0076] It should be noted that the TCI status is a mobile communication status used for the 3GPP interface, which indicates information about the radio link configuration and transmission mode.

[0077] Step S209: If the terminal does not have a valid tracking area (TA) of the cell to be handed over, the terminal performs a random access procedure.

[0078] Understandably, a terminal can send an access request to the cell to which it is to be handed over by performing a random access procedure.

[0079] Step S210: The terminal sends an RRC reconfiguration complete message to the network-side device.

[0080] It is understandable that the terminal can complete the LTM cell handover process by sending an RRC reconfiguration complete message to the cell to which it wants to hand over.

[0081] It should be noted that if the terminal performs a Random Access (RA) procedure in step S209 above, the terminal can consider the LTM cell handover to be successfully completed when the random access procedure is successfully completed. For LTM without a Random Access Channel (RACH), the terminal can consider the LTM cell handover to be successfully completed when it determines that the network-side equipment has successfully received its first uplink data.

[0082] It should be noted that for continuous LTM processes, steps S204 to S208 can be executed multiple times using the LTM candidate configuration provided in step S203 to perform subsequent LTM cell handover.

[0083] The communication method provided in this application allows the terminal to obtain deployment information of at least one network object. Therefore, during LTM handover, the terminal can accurately determine the network object matching its own movement state from among the at least one network object based on the deployment information of that network object. Thus, by performing a first operation, the terminal can switch to the network object matching its own movement state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby reducing handover failures and improving the terminal's communication performance and quality.

[0084] The communication methods, devices, terminals, network-side equipment, media, and computer program products provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0085] The communication method, apparatus, terminal, network-side equipment, medium, and computer program products provided in this application can be applied to scenarios where the terminal performs LTM handover, especially LTM handover scenarios where the terminal moves along a fixed route or a known route (such as a high-speed rail line).

[0086] Figure 4 A flowchart illustrating a communication method provided in an embodiment of this application is shown, as follows: Figure 4 As shown, the communication method may include the following steps 101 and 102.

[0087] Step 101: The terminal obtains deployment information of at least one network object.

[0088] The aforementioned network object may include at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, and at least one beam.

[0089] In some embodiments of this application, the above-mentioned at least one network object can be indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information.

[0090] In some embodiments of this application, the first beam described above may be a TCI state indication beam.

[0091] In some embodiments of this application, the second beam described above may be a beam indicating downlink TCI status and uplink TCI status.

[0092] In some embodiments of this application, when the at least one network object includes at least one LTM candidate cell, the deployment information of the at least one network object may include information of sequentially configured LTM candidate cells.

[0093] In some embodiments of this application, the LTM configuration identification information described above can be used to indicate the configuration identifier (ID) of the cell candidate configuration index.

[0094] In some embodiments of this application, the cell identification information may include, but is not limited to: Physical Cell Identifier (PCI) and cell frequency.

[0095] In some embodiments of this application, the cell identification information and LTM configuration identification information described above can be used together to identify network objects in order to support cross-cell LTM or Inter-CU LTM.

[0096] In some embodiments of this application, the above deployment information may include: identifiers of at least one network object sequentially indicated according to the arrangement order of at least one network object.

[0097] In some embodiments of this application, when the number of network objects is 1, the deployment information can indicate the network objects adjacent to the current network object of the terminal according to the arrangement order of the network objects, or the 1 network object can be a network object in the direction of terminal movement.

[0098] For example, when the number of network objects is 1, the deployment information can indicate an LTM candidate cell that is adjacent to the terminal's current LTM cell in the direction of terminal movement.

[0099] In some embodiments of this application, the above deployment information is used to indicate at least one of the following: the arrangement of at least one network object in a first direction; and network objects that are adjacent to each other in at least one network object.

[0100] In some embodiments of this application, the first direction may be the same as the direction of terminal movement or a different direction. This application does not impose specific limitations on the embodiments.

[0101] In some embodiments of this application, the arrangement of at least one network object in the first direction can be understood as: the arrangement of at least one network object in the first direction according to the arrangement order of the at least one network object.

[0102] In one embodiment, the network objects adjacent to each network object in the at least one network object can refer to the network objects that are adjacent to each other in a first direction.

[0103] It is understood that the arrangement of at least one network object in the first direction can refer to the arrangement of the at least one network object adjacent to each other or not adjacent to each other in the first direction.

[0104] In some embodiments of this application, the above-mentioned adjacent arrangement can be understood as at least one network object having adjacent geographical locations or coverage areas.

[0105] In some embodiments of this application, when the deployment information indicates neighboring cells of each network object in at least one network object, if the neighboring network objects of each network object are all network objects in at least one network object, it can be understood that the at least one network object is arranged adjacently. For example, assuming that at least one network object includes network object 1, network object 2, and network object 3, if the deployment information of the at least one network object indicates that the neighboring network object of network object 1 is network object 2, the neighboring network objects of network object 2 are network object 1 and network object 3, and the neighboring network object of network object 3 is network object 2, then network object 1, network object 2, and network object 3 are arranged adjacently.

[0106] For example, taking the above-mentioned at least one network object as an example, which includes at least one LTM candidate cell, the above-mentioned deployment information can be used to instruct the at least one LTM candidate cell to be arranged in the same direction as the terminal's movement direction or to be arranged adjacent to each other.

[0107] For example, taking the above-mentioned at least one network object as an example, which includes at least one TRP, the above-mentioned deployment information can be used to indicate that the at least one TRP is arranged adjacently in the same direction as the direction of terminal movement.

[0108] For example, taking the case where at least one network object includes at least one beam, the deployment information can be used to indicate that the at least one beam is arranged in a direction different from the direction of terminal movement or arranged adjacently.

[0109] In some embodiments of this application, the above-mentioned at least one network object can be a network object within a high-speed cell.

[0110] In some embodiments of this application, the at least one network object described above may also be a network object used to cover a fixed route.

[0111] It is understood that, during the process of the terminal moving along a fixed or known route, at least one of the aforementioned network objects can be network objects used to cover the fixed or known route.

[0112] For example, when a user is traveling on a high-speed train with a terminal, at least one of the aforementioned network objects can be network objects deployed along the high-speed train line.

[0113] In some embodiments of this application, the terminal can obtain information about at least one network object and its deployment information.

[0114] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5 As shown, assuming TRP2 is the TRP where the terminal is currently located, then at least one of the above network objects can be TRP1, TRP2, TRP3, TRP4, TRP5, and TRP6 deployed sequentially along the high-speed rail line.

[0115] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5 As shown, assuming TRP2 is the TRP where the terminal is currently located, then at least one of the above network objects can be deployed sequentially along the high-speed rail line as TRP6, TRP5, TRP4, TRP3, TRP2, and TRP1.

[0116] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5 As shown, assuming TRP2 is the terminal's current TRP, then at least one of the aforementioned network objects can also be TRP3, which is adjacent to TRP2. It can be understood that, depending on the terminal's direction of movement, TRP3 is the TRP the terminal will switch to next.

[0117] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5As shown, assuming TRP2 is the terminal's current TRP, then at least one of the aforementioned network objects can also be TRP3, TRP4, TRP5, and TRP6. It can be understood that, depending on the terminal's direction of movement, the terminal will sequentially pass through TRP3, TRP4, TRP5, and TRP6.

[0118] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5 As shown, assuming TRP2 is the current TRP of the terminal, the above-mentioned at least one network object can also be TRP3, TRP4, TRP5 arranged in the same direction, or the above-mentioned at least one network object can also be TRP3, TRP4, TRP6 arranged in the same direction.

[0119] It is understood that the above-mentioned at least one network object may include the LTM cell of the terminal, and thus the deployment information of the at least one network object can represent the adjacency relationship or arrangement between the at least one network object.

[0120] In some embodiments of this application, if the terminal's serving cell is not included in the at least one network object, the network object ranked first among the at least one network objects can be determined as the cell adjacent to or closest to the terminal's LTM cell.

[0121] In some embodiments of this application, step 101 described above can be implemented by step 101a as follows.

[0122] Step 101a: The terminal receives second information from the first network-side device.

[0123] The second piece of information mentioned above may include deployment information.

[0124] In some embodiments of this application, the second information mentioned above may include at least one of the following: measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

[0125] In some embodiments of this application, the first network-side device can send second information carrying deployment information to the terminal so that the terminal can obtain the deployment information of the at least one network object.

[0126] In some embodiments of this application, the aforementioned measurement configuration information may be information from which a first network-side device instructs a terminal to perform a specific measurement task via RRC signaling.

[0127] In some embodiments of this application, the first network-side device described above can be a network-side device that provides services to the terminal before the terminal handover. This first network-side device can also be referred to as a source node, a source master node, or a source slave node.

[0128] For example, the first network-side device can send an RRC reconfiguration message to the terminal, carrying deployment information of at least one network object through measurement configuration information contained in the RRC reconfiguration message. The deployment information of the at least one network object can be represented by a cell identifier or a conditional reconfiguration identifier.

[0129] In practice, the deployment information of the at least one network object can also be represented in any other possible way, and the embodiments of this application do not impose specific limitations.

[0130] In some embodiments of this application, the aforementioned measurement configuration information may include information on at least one network object configured in sequence, i.e., deployment information of the at least one network object. In other words, the network objects configured in the measurement configuration information are arranged in the same direction or are adjacent to each other.

[0131] In some embodiments of this application, the LTM candidate configuration information described above may be measurement configuration information or information configured in the RRC reconfiguration message.

[0132] It should be noted that, in actual implementation, the terminal can obtain deployment information of at least one network object by receiving messages sent by the first network-side device; the terminal can also obtain deployment information of at least one network object from the network-side device corresponding to a third-party application. This application does not impose specific limitations on the embodiments thereof.

[0133] For example, assuming the terminal moves along a high-speed rail line, the terminal can obtain deployment information of at least one network object corresponding to the high-speed rail line from the server corresponding to the high-speed rail application.

[0134] In this way, the terminal can obtain the deployment information of at least one first cell by receiving the second information sent by the network-side device. During LTM handover, the terminal can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of that network object. Thus, by performing the first operation, the terminal can switch to the network object matching its own state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality.

[0135] Step 102: Based on the deployment information, the terminal performs the first operation.

[0136] The first operation mentioned above may include at least one of the following: sending first information; conditional LTM switching; continuous LTM switching.

[0137] In this embodiment of the application, the first information described above can be used to indicate the LTM cell to which handover is desired.

[0138] The communication method provided in this application allows the terminal to obtain deployment information of at least one network object. Therefore, during LTM handover, the terminal can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of that network object. Thus, by performing a first operation, the terminal can switch to the network object matching its own state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality.

[0139] In some embodiments of this application, when the first operation includes sending first information, step 102 can be specifically implemented by step 102a as described below.

[0140] Step 102a: Based on the deployment information, the terminal sends the first information to the first network-side device.

[0141] In some embodiments of this application, after obtaining deployment information of at least one network object, the terminal can send first information to the first network-side device to indicate the LTM cell to which handover is desired, so that after receiving the handover command sent by the first network-side device, handover can be performed.

[0142] Understandably, in this situation, the terminal cannot determine which LTM cell to hand over to before receiving the handover command.

[0143] In some embodiments of this application, the aforementioned first information may be used to report the L1 measurement results or LTM handover preference of the LTM cell to be handed over to the first network-side device.

[0144] In some embodiments of this application, the LTM cell to be switched is determined based on at least one of the following: deployment information of at least one network object, measurement results of the at least one network object, and the direction of movement of the terminal.

[0145] In some embodiments of this application, the direction of movement of the terminal can be determined by the historical information of the terminal's cell handover.

[0146] It should be noted that a detailed description of how the terminal determines its direction of movement based on historical information about cell handover can be found in the detailed description of step 104 below. To avoid repetition, it will not be repeated here.

[0147] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5As shown, one TRP can correspond to one LTM cell. Assuming LTM cell 2 is the terminal's current LTM cell, the deployment information of at least one of the aforementioned network objects is that LTM cells 1, 2, 3, 4, 5, and 6 are deployed adjacently in sequence. The terminal's handover history is from LTM cell 1 to LTM cell 2; that is, the terminal's movement direction should be the same as the direction from LTM cell 1 to LTM cell 2. In other words, the terminal's next handover should be to LTM cell 3. After the measurement event associated with LTM cell 3 is triggered, the terminal can report the measurement results of LTM cell 3 or indicate LTM cell 3 as the preferred handover cell.

[0148] Understandably, in this situation, even if the signal strength of LTM cell 1 meets the reporting conditions, the terminal, after combining the direction of movement and the deployment information of at least one network object, will not choose to report LTM cell 1, but will report LTM cell 3 instead, in order to avoid the LTM cell becoming unavailable after the terminal hands over.

[0149] In some embodiments of this application, after receiving the first information sent by the terminal, the first network-side device can make a handover decision and send a handover command to the terminal. The terminal can then execute the handover upon receiving the handover command.

[0150] For example, such as Figure 5 As shown, after receiving the first information sent by the terminal, the first network-side device can send a handover command to the terminal, instructing the terminal to hand over to LTM cell 3. Thus, after receiving the handover command, the terminal can hand over to LTM cell 3.

[0151] In this way, the terminal can report the LTM cell to be switched to based on the deployment information of at least one network object, which helps the first network-side device to switch the terminal to a suitable LTM cell, thereby avoiding terminal handover failure and improving the terminal's communication performance and communication quality.

[0152] In some embodiments of this application, when the first operation includes conditional LTM handover, the at least one network object includes at least one LTM candidate cell, and the at least one LTM candidate cell includes a first LTM candidate cell, the above step 102 can be specifically implemented by the following step 102b.

[0153] Step 102b: Based on the deployment information, the terminal performs conditional LTM handover to the first LTM candidate cell.

[0154] In some embodiments of this application, after obtaining the deployment information of at least one network object, the terminal can also perform conditional LTM from at least one network object and switch to the first LTM candidate cell.

[0155] In some embodiments of this application, when the first network-side device is configured with an LTM candidate cell, the LTM candidate cell may be adjacent to the terminal's LTM cell or be located in the direction of the terminal's movement.

[0156] In some embodiments of this application, before sending deployment information of at least one network object to the terminal, the first network-side device may send in-order handover request information to the second network-side device and other potential network-side devices to request them to prepare for in-order handover. That is, the terminal is handing over according to the deployment order of LTM cells on the fixed line.

[0157] It is understandable that the first network-side device can send sequential LTM candidate cell configurations to the second network-side device and other potential network-side devices.

[0158] It should be noted that the aforementioned second network-side device can be a network-side device that provides services to the first LTM candidate cell.

[0159] In some embodiments of this application, the second network device described above can configure relevant network deployments for the terminal based on the sequential handover request information.

[0160] In some embodiments of this application, after obtaining deployment information of at least one network object, the terminal can perform LTM condition evaluation based on the deployment information of the at least one network object, and perform conditional LTM switching based on the evaluation result.

[0161] For example, the terminal may prioritize the evaluation or selection of the highest-order LTM cell among the at least one network object based on at least one of the deployment information of the at least one network object, the direction of movement of the terminal, and the measurement results of the at least one network object.

[0162] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5As shown, assuming cell 2 is the terminal's current LTM cell, the deployment information of at least one of the aforementioned network objects is that LTM cells 1, 2, 3, 4, 5, and 6 are deployed adjacently in sequence. The terminal's historical cell handover information is from LTM cell 1 to LTM cell 2, meaning the terminal's movement direction should be the same as the direction from LTM cell 1 to LTM cell 2. In other words, the terminal's next LTM cell handover should be cell 3. After the execution conditions associated with LTM cell 3 are met, the terminal can use LTM cell 3 as the LTM cell for handover.

[0163] Understandably, in this situation, even if LTM cell 1 and LTM cell 4 also meet the execution conditions for conditional LTM handover, the terminal, after combining the direction of movement and the deployment information of at least one network object, will not choose LTM cell 1 or LTM cell 4, but will choose LTM cell 3 for handover, in order to avoid the cell becoming unavailable after the terminal hands over.

[0164] In this way, the terminal can perform conditional LTM handover based on the deployment information of at least one network object, thereby switching to an LTM cell that matches the terminal's direction of movement, achieving sequential handover, avoiding terminal handover failure, and improving the terminal's communication performance and quality.

[0165] In some embodiments of this application, the first operation described above may also include condition switching.

[0166] In some embodiments of this application, step 102 described above may also be implemented by at least one of steps 102c and 102d described below.

[0167] Step 102c: Based on the deployment information, the terminal performs conditional LTM handover within or between cells.

[0168] Step 102d: Based on the deployment information, the terminal performs a conditional switch to the first cell and selects the first LTM candidate cell from the first cell for access.

[0169] In some embodiments of this application, when the first operation further includes conditional switching, the first network-side device can be configured with both conditional switching and conditional LTM switching. The terminal can perform conditional switching or conditional LTM switching based on the deployment information of at least one network object sent by the first network-side device, and sequentially switch the corresponding network object along a fixed route.

[0170] In some embodiments of this application, the aforementioned intra-cell or inter-cell conditional LTM handover may also be referred to as intra-CU or inter-CU conditional LTM handover.

[0171] In some embodiments of this application, the first cell mentioned above can be the cell selected after the terminal performs condition evaluation.

[0172] Understandably, since a cell may contain multiple LTM candidate cells, when performing conditional handover, the terminal can select the first LTM candidate cell from the first cell for access.

[0173] For example, the first LTM candidate cell can be the first LTM cell in the terminal's movement direction in the first cell.

[0174] In some embodiments of this application, when both conditional switching and conditional LTM switching are configured simultaneously, the terminal can perform condition evaluation including conditional switching and conditional LTM switching, thereby performing conditional switching sequentially when the execution conditions for conditional switching are met, or performing conditional LTM switching sequentially when the execution conditions for conditional LTM switching are met.

[0175] In some embodiments of this application, the first network-side device may send an RRC reconfiguration message to the terminal, which carries at least one of the following: conditional handover configuration and LTM candidate configuration, and Inter-CU LTM configuration.

[0176] For example, the first network-side device can send an RRC reconfiguration message to the terminal, which may include conditional handover configuration and LTM candidate configuration. For instance, as... Figure 6 As shown, the RRC reconfiguration message can contain candidate cell 1, candidate cell 2, candidate cell 3, and candidate cell 4. Each candidate cell can contain 3 LTM configurations, which can also be referred to as LTM cells. That is, candidate cell 1 contains LTM cell 1, LTM cell 2, and LTM cell 3; candidate cell 2 contains LTM cell 4, LTM cell 5, and LTM cell 6; candidate cell 3 contains LTM cell 7, LTM cell 8, and LTM cell 9; and candidate cell 4 contains LTM cell 10, LTM cell 11, and LTM cell 12.

[0177] For example, in cases where the RRC reconfiguration message can include the Inter-CU LTM configuration, such as... Figure 6 As shown, the RRC reconfiguration message may include LTM cell 1, LTM cell 2 and LTM cell 3 included in candidate cell 1, and LTM cell 4 included in candidate cell 2.

[0178] It is understandable that the above deployment information may include the deployment order of inter-cell LTM configurations (i.e., Inter-CU LTM configurations), which is the deployment order of LTM configurations across cells.

[0179] In some embodiments of this application, after the terminal performs a condition evaluation including conditional handover and conditional LTM handover, the terminal can perform conditional handover sequentially when the execution conditions for conditional handover are met. For example, the terminal can select the first LTM configuration of the first cell when applying the conditional handover configuration. This first LTM configuration is the configuration of the first LTM cell passed through when the terminal enters the first cell along its movement direction.

[0180] Understandably, the terminal can first perform a conditional handover to the first cell, and at the same time select the configuration of the first LTM cell within the first cell.

[0181] In some embodiments of this application, after the terminal performs a condition evaluation including conditional switching and conditional LTM switching, conditional LTM switching is performed sequentially when the execution conditions for conditional LTM switching are met.

[0182] It is understandable that after the terminal hands over to the first LTM candidate cell within the first cell, it can continue to perform the LTM process, sequentially handing over from the first LTM candidate cell to the second LTM candidate cell, the third LTM candidate cell, and so on within the first cell. That is, the terminal can perform continuous LTM handover.

[0183] In some embodiments of this application, when a terminal performs conditional LTM handover between cells, the terminal can perform conditional LTM handover across cells.

[0184] For example, such as Figure 6 As shown, after the terminal switches from LTM cell 5 in cell 2 to LTM cell 6, when the execution conditions for inter-cell conditional LTM handover are met, the terminal can perform inter-cell conditional LTM handover, switching from LTM cell 6 in cell 2 to LTM cell 7 in cell 3.

[0185] Thus, with both cell handover configuration and LTM configuration configured simultaneously, the terminal can perform conditional handover or conditional LTM handover in sequence based on the deployment information, thereby enabling more accurate handover along the mobile route and achieving better communication performance.

[0186] In some embodiments of this application, the communication method provided in this application may further include the following step 103.

[0187] Step 103: The terminal sends third information to the first network-side device.

[0188] The third piece of information mentioned above can be handover assistance information, which can be used to indicate the LTM preference information of the terminal.

[0189] In some embodiments of this application, the aforementioned third information may include at least one of the following: a first request; the terminal's movement status; the terminal's movement route; the terminal's movement direction; first indication information; and historical LTM information.

[0190] In some embodiments of this application, the first request described above can be used to request sequential handover of LTM cells.

[0191] In some embodiments of this application, the movement state of the terminal can indicate whether the terminal is in a high-speed state.

[0192] For example, the mobile state of the terminal can indicate whether the terminal has entered or exited a high-speed state.

[0193] In some embodiments of this application, when the terminal's movement route is a known route, or when the terminal moves along a fixed route, the aforementioned third information may include the terminal's movement route. It is understood that the terminal's movement direction can also be determined based on movement along a fixed route, such as the direction from the starting station to the ending station of a high-speed rail line.

[0194] In some embodiments of this application, the first instruction information described above can be used to instruct the terminal to move along a fixed route.

[0195] In some embodiments of this application, the aforementioned historical LTM information can be used to indicate historical information for LTM handover of the terminal.

[0196] In some embodiments of this application, the aforementioned historical LTM information may include at least one of the following: identification information of at least one LTM cell traversed by the terminal; handover interval of the terminal's LTM cell; and dwell time of the terminal in at least one LTM cell traversed.

[0197] In some embodiments of this application, the terminal can determine the direction of movement of the terminal based on at least one network object that the terminal passes through.

[0198] In some embodiments of this application, the cell handover interval of the terminal may refer to the interval between two handovers of the terminal.

[0199] For example, the interval between two terminal switching can be 30 seconds.

[0200] It is understandable that the terminal's moving speed can be calculated based on the LTM cell handover interval. That is, the terminal's moving speed = distance between LTM cells / terminal's LTM cell handover interval. For example, if the distance between LTM cells is 500 meters and the terminal's LTM cell handover interval is approximately 5 seconds, then the terminal's moving speed is approximately 360 km / h.

[0201] In some embodiments of this application, the terminal's moving speed can also be calculated based on the dwell time of the terminal on at least one LTM cell and the diameter of the LTM cell. That is, the terminal's moving speed = diameter of the LTM cell / dwell time of the terminal on that LTM cell.

[0202] It should be noted that when the aforementioned network object is a network object other than LTM candidate cells, such as TRP, the terminal's direction of movement or movement status can also be determined based on its corresponding handover history information.

[0203] In this way, the terminal can report third information that indicates the terminal's LTM handover preference, so that the network-side device can perform the LTM handover process based on the information such as the terminal's mobility status, direction of movement, and sequential handover. This helps the network-side device to hand over the terminal to a cell that matches the terminal's mobility status and direction of movement.

[0204] In some embodiments of this application, before step 103 above, the communication method provided in the embodiments of this application may further include step 104 below.

[0205] Step 104: The terminal determines its direction of movement based on historical LTM information.

[0206] In some embodiments of this application, the terminal may store historical information of LTM handover, thereby determining the terminal's direction of movement based on the historical information of LTM handover.

[0207] For example, consider a user carrying a terminal while traveling on a high-speed train. Figure 5 As shown, assuming LTM cell 2 is the LTM cell where the terminal is currently located, the terminal's historical information for LTM handover is from LTM cell 1 to LTM cell 2. That is, the terminal's movement direction should be the same as the direction from LTM cell 1 to LTM cell 2.

[0208] In this way, the terminal can determine its direction of movement based on historical LTM information, and thus determine the cell that matches the terminal's movement state based on the deployment information of at least one first cell and the direction of movement. For example, during the terminal's movement, the terminal can accurately switch to the LTM cell located in its direction of movement, thereby reducing terminal handover failures and improving the terminal's communication performance and communication quality.

[0209] The following specific examples illustrate the communication method provided in the embodiments of this application.

[0210] Example 1: As Figure 7 As shown, the communication method may include the following steps S301 to S310.

[0211] Step S301: The terminal sends a measurement report message to the first network-side device.

[0212] Step S302: The first network-side device decides to configure LTM and initiates LTM preparation.

[0213] Step S303: The terminal receives the RRC reconfiguration message sent by the first network-side device.

[0214] The RRC reconfiguration message may contain deployment information for at least one network object.

[0215] Step S304: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0216] Step S305a: Before receiving the cell handover command, the terminal performs downlink synchronization of the LTM candidate cell.

[0217] Step S305b: Before receiving the cell handover command, the terminal performs uplink synchronization of the LTM candidate cell.

[0218] Step S306: The terminal performs L1 measurement on the LTM candidate cells and sends an L1 measurement report to the first network-side device.

[0219] The L1 measurement report may include initial information.

[0220] Step S307: The first network-side device decides to perform LTM cell in-order handover.

[0221] Step S308: The first network-side device sends an LTM cell handover command.

[0222] Step S309: If the terminal does not have a valid TA for the cell to be switched to, the terminal performs a random access procedure.

[0223] Understandably, a terminal can send an access request to the cell to which it is to be handed over by performing a random access procedure.

[0224] Step S310: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0225] It is understandable that the terminal can complete the LTM cell handover process by sending an RRC reconfiguration complete message to the cell to which it wants to hand over.

[0226] Thus, when the network-side device is uncertain about the terminal's high-speed movement status and direction of movement, the terminal can report an L1 measurement report carrying the first information to help the network-side device perform LTM handover that conforms to the terminal's high-speed movement status and direction of movement, i.e., perform sequential LTM.

[0227] Example 2: As Figure 8 As shown, the communication method may further include the following steps S401 to S407.

[0228] Step S401: The terminal sends a measurement report message to the first network-side device.

[0229] Step S402: The first network-side device decides to configure LTM and initiates LTM preparation.

[0230] Step S403: The terminal receives the RRC reconfiguration message sent by the first network-side device.

[0231] The RRC reconfiguration message may contain deployment information for at least one network object.

[0232] Step S404: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0233] Step S405: The terminal performs LTM condition assessment and performs sequential LTM handover.

[0234] The terminal may, based on at least one of the deployment information of the at least one network object, the terminal’s direction of movement and measurement results, prioritize the evaluation or selection of the LTM cell with the highest order or the most adjacent LTM cell as the LTM cell to be handed over.

[0235] Step S406: If the terminal does not have a valid timing advance (TA) for the cell to be handed over, the terminal performs a random access procedure.

[0236] Step S407: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0237] It is understandable that the terminal can complete the LTM cell handover process by sending an RRC reconfiguration complete message to the cell to which it wants to hand over.

[0238] In this way, the terminal can perform conditional handover based on the deployment information sent by the first network-side device, and switch to an LTM cell that matches the terminal's direction of movement, thereby achieving sequential conditional LTM handover, which improves the success rate of conditional LTM handover and can achieve better communication performance.

[0239] Example 3: As Figure 9 As shown, the communication method may further include the following steps S501 to S511.

[0240] Step S501: The terminal sends third information to the first network-side device.

[0241] The third information may include at least one of the following: a first request, which requests sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; first indication information, which instructs the terminal to move along a fixed route; and historical LTM information, which instructs the terminal to perform historical handovers.

[0242] Step S502: The terminal sends a measurement report message to the first network-side device.

[0243] Step S503: The first network-side device decides to configure LTM and initiates LTM preparation.

[0244] Step S504: The terminal receives the RRC reconfiguration message sent by the first network-side device.

[0245] Optionally, the RRC reconfiguration message may contain deployment information for at least one network object.

[0246] Step S505: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0247] Step S506a: Before receiving the cell handover command, the terminal performs downlink synchronization of the LTM candidate cell.

[0248] Step S506b: Before receiving the cell handover command, the terminal performs uplink synchronization of the LTM candidate cell.

[0249] Step S507: The terminal performs L1 measurement on the LTM candidate cells and sends an L1 measurement report to the first network-side device.

[0250] Optionally, the L1 measurement report may include initial information.

[0251] Step S508: The first network-side device decides to perform LTM cell in-order handover.

[0252] Step S509: The first network-side device sends an LTM cell handover command.

[0253] Step S510: If the terminal does not have a valid TA for the cell to be switched to, the terminal performs a random access procedure.

[0254] Understandably, a terminal can send an access request to the cell to which it is to be handed over by performing a random access procedure.

[0255] Step S511: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0256] It is understandable that the terminal can complete the LTM cell handover process by sending an RRC reconfiguration complete message to the cell to which it wants to hand over.

[0257] In this way, the first network-side device can perform the LTM process based on the terminal's reported terminal movement status, movement direction, and sequential LTM handover information. This helps the first network-side device to perform the LTM process that conforms to the terminal's high-speed movement status and movement direction, which can avoid terminal handover failure and improve the terminal's communication performance and communication quality.

[0258] Example 4: Figure 10 As shown, the communication method may further include the following steps S601 to S608.

[0259] Step S601: The terminal sends third information to the first network-side device.

[0260] The third information may include at least one of the following: a first request, which requests sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; first indication information, which instructs the terminal to move along a fixed route; and historical LTM information, which instructs the terminal to perform historical handovers.

[0261] Step S602: The terminal sends a measurement report message to the first network-side device.

[0262] Step S603: The first network-side device decides to configure LTM and initiates LTM preparation.

[0263] Step S604: The terminal receives the RRC reconfiguration message sent by the first network-side device.

[0264] Optionally, the RRC reconfiguration message may contain deployment information for at least one network object.

[0265] Step S605: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0266] Step S606: The terminal performs LTM condition assessment and performs sequential LTM handover.

[0267] Step S607: If the terminal does not have a valid TA for the cell to be switched to, the terminal performs a random access procedure.

[0268] Step S608: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0269] It is understandable that the terminal can complete the LTM cell handover process by sending an RRC reconfiguration complete message to the cell to which it wants to hand over.

[0270] In this way, the first network-side device can perform the LTM process based on the terminal's reported terminal movement status, movement direction, and sequential LTM handover information. This helps the first network-side device to perform the LTM process that conforms to the terminal's high-speed movement status and movement direction, which can reduce terminal handover failures and improve the terminal's communication performance and communication quality.

[0271] Example 5: Figure 11 As shown, the communication method may further include the following steps S701 to S708.

[0272] Step S701: The terminal sends third information to the first network-side device.

[0273] The third information may include at least one of the following: a first request, which requests sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; first indication information, which instructs the terminal to move along a fixed route; and historical LTM information, which instructs the terminal to perform historical handovers.

[0274] It should be noted that step S701 above is an optional step.

[0275] Step S702: The terminal sends a measurement report message to the first network-side device.

[0276] Step S703: The terminal receives the RRC reconfiguration message sent by the first network-side device.

[0277] The RRC reconfiguration message may include at least one of the following: conditional handover configuration and LTM candidate configuration; inter-cell conditional LTM handover configuration.

[0278] In some embodiments of this application, the aforementioned RRC reconfiguration message may also include deployment information for at least one network object.

[0279] Step S704: The terminal sends an RRC reconfiguration complete message to the first network-side device.

[0280] Step S705: The terminal performs condition assessment and performs sequential handover.

[0281] The aforementioned condition assessment may include assessments of condition switching and condition LTM.

[0282] Steps S706-S708: Switching terminal execution conditions.

[0283] The aforementioned conditional handover may include at least one of the following: performing conditional handover sequentially when the execution conditions for conditional handover are met; performing conditional LTM handover sequentially when the conditions for conditional LTM handover are met; and conditional LTM handover between cells.

[0284] Thus, with both cell handover configuration and LTM configuration configured simultaneously, the terminal can perform conditional handover or conditional LTM handover in sequence based on the deployment information, thereby enabling more accurate handover along the mobile route and achieving better communication performance.

[0285] Figure 12 A flowchart illustrating a communication method provided in an embodiment of this application is shown, as follows: Figure 12 As shown, the communication method may include the following step 201.

[0286] Step 201: The first network-side device sends deployment information of at least one network object to the terminal.

[0287] The aforementioned network object may include at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one TRP, and at least one beam.

[0288] In some embodiments of this application, the above-mentioned at least one network object can be indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information.

[0289] The first beam can be the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam can be the beam indicating the downlink TCI status and the uplink TCI status.

[0290] In some embodiments of this application, the above deployment information may be used to indicate at least one of the following: the arrangement of at least one network object in a first direction; and network objects that are adjacent to each other in at least one network object.

[0291] In some embodiments of this application, the above-mentioned at least one network object can be a network object within a high-speed cell.

[0292] In some embodiments of this application, the at least one network object described above may also be a network object used to cover a fixed route.

[0293] It should be noted that for a detailed description of step 201 above, please refer to the relevant descriptions of steps 101 and 102 above. To avoid repetition, it will not be repeated here.

[0294] In some embodiments of this application, the first network-side device may also determine the LTM cell handover command based on information such as the terminal's mobility status or direction of movement, and send the command for sequential LTM handover to the terminal.

[0295] Understandably, in this scenario, the first network-side device may not send deployment information for at least one network object to the terminal.

[0296] In some embodiments of this application, the first network-side device may retain the context information of the terminal and determine the LTM cell to be switched in sequence based on the context information of the terminal.

[0297] The context information of the terminal may include at least one of the following: the terminal's historical LTM information, the terminal's movement status, and the terminal's movement direction.

[0298] In some embodiments of this application, historical LTM information is used to indicate historical information for LTM handover of the terminal.

[0299] In some embodiments of this application, the above deployment information may carry second information.

[0300] In some embodiments of this application, the second information may include at least one of the following: measurement configuration information, LTM candidate configuration information, and RRC reconfiguration message.

[0301] In some embodiments of this application, the first network-side device may also send measurement configuration information of network objects in the direction of terminal movement to the terminal based on the context information of the terminal, so that the terminal can perform handover by triggering measurement events related to network objects in the direction of terminal movement.

[0302] Of course, in actual implementation, the measurement configuration information may also include measurement configuration information for other network objects in the opposite direction of the terminal's movement. This application embodiment does not impose specific limitations. It is understood that the measurement configuration information for other network objects in the opposite direction of the terminal's movement may set a large offset or threshold value for the corresponding measurement events, making it difficult for the terminal to trigger measurement events related to those other network objects.

[0303] In some embodiments of this application, the first network-side device may also configure priority information for at least one network object.

[0304] For example, the first network-side device can set a higher priority for network objects located in the direction of terminal movement among at least one network object, so as to instruct the terminal to prioritize measuring or reporting network objects with higher priority, thereby allowing the terminal to prioritize switching to the network object with higher priority.

[0305] The communication method provided in this application allows the terminal to obtain deployment information of at least one network object. Therefore, during LTM handover, the terminal can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of that network object. Thus, by performing a first operation, the terminal can switch to the network object matching its own state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality.

[0306] In some embodiments of this application, after step 201 described above, the communication method provided in the embodiments of this application may further include step 202 as described below.

[0307] Step 202: The first network-side device receives the first information from the terminal.

[0308] The aforementioned first information can be used to indicate the LTM cell to which handover is desired.

[0309] It should be noted that for a detailed description of step 202 above, please refer to the relevant description of step 102a above. To avoid repetition, it will not be repeated here.

[0310] In this way, the terminal can report the LTM cell to be switched to based on the deployment information of at least one network object, which helps the first network-side device to switch the terminal to a suitable LTM cell, thereby avoiding terminal handover failure and improving the terminal's communication performance and communication quality.

[0311] In some embodiments of this application, after step 202 described above, the communication method provided in the embodiments of this application may further include step 203 as described below.

[0312] Step 203: The first network-side device sends an LTM cell handover command to the terminal.

[0313] The LTM cell handover command can be used to instruct LTM cells to be switched sequentially based on deployment information.

[0314] It is understandable that the LTM cell handover command can typically be included in the RRC reconfiguration message. This LTM cell handover command instructs the terminal to perform an LTM handover operation. The RRC reconfiguration message can also contain relevant information and configuration parameters of the LTM cell to be handed over, ensuring that the terminal can successfully access the LTM cell and maintain communication continuity.

[0315] In this way, the terminal can perform conditional LTM handover based on the deployment information of at least one network object, thereby switching to an LTM cell that matches the terminal's direction of movement, achieving sequential handover, avoiding terminal handover failure, and improving the terminal's communication performance and quality.

[0316] In some embodiments of this application, before step 201 above, the communication method provided in the embodiments of this application may further include step 204 below.

[0317] Step 204: The first network-side device receives third information from the terminal.

[0318] The aforementioned third information may include at least one of the following: a first request; the terminal's movement status; the terminal's movement route; the terminal's movement direction; first indication information; and historical LTM information.

[0319] In some embodiments of this application, the first request can be used to request sequential handover of LTM cells.

[0320] In some embodiments of this application, the first instruction information can be used to instruct the terminal to move along a fixed route.

[0321] In some embodiments of this application, historical LTM information is used to indicate historical information for LTM handover of the terminal.

[0322] In some embodiments of this application, when the third information includes the terminal's movement route, the deployment information may include the deployment information of the LTM cell corresponding to the terminal's movement route.

[0323] It should be noted that for a detailed description of step 204 above, please refer to the relevant description of step 103 above. To avoid repetition, it will not be repeated here.

[0324] In this way, the terminal can report third information that indicates the terminal's LTM handover preference, so that the network-side equipment can perform the handover process based on the information such as the terminal's mobility status, direction of movement, and sequential handover. This helps the network-side equipment to hand over the terminal to a cell that matches the terminal's mobility status and direction of movement.

[0325] In some embodiments of this application, the communication method provided in this application may further include the following step 205.

[0326] Step 205: The first network-side device sends the fourth information to the second network-side device.

[0327] The aforementioned fourth information may include at least one of the following: the terminal's movement status; the second request; the second indication information; historical LTM information; and the terminal's movement direction.

[0328] In some embodiments of this application, the second request can be used to request sequential handover of LTM cells.

[0329] In some embodiments of this application, the second instruction information can be used to instruct the terminal to move along a fixed route.

[0330] In some embodiments of this application, the aforementioned fourth information may be carried in the terminal context request message.

[0331] In some embodiments of this application, before sending deployment information of at least one network object to the terminal, the first network-side device may send in-order handover LTM request information to the second network-side device and other potential network-side devices to request the second network-side device and other potential network-side devices to prepare for in-order handover LTM. That is, the terminal is performing LTM handover according to the deployment order of cells on the fixed line.

[0332] It is understandable that the first network-side device can send the ordered conditional LTM candidate cell configuration to the second network-side device and other potential network-side devices.

[0333] Thus, the aforementioned fourth piece of information ensures that the terminal can successfully access the LTM cell to be switched and maintain communication continuity.

[0334] In some embodiments of this application, the communication method provided in the embodiments of this application may further include the following step 206.

[0335] Step 206: The first network-side device saves the terminal's context information.

[0336] The context information of the terminal may include at least one of the following: the terminal's historical LTM information, the terminal's movement status, and the terminal's movement direction.

[0337] In some embodiments of this application, before step 206 above, the communication method provided in the embodiments of this application may further include step 207 below.

[0338] Step 207: The first network-side device determines the terminal's mobility status or direction of movement based on historical LTM information.

[0339] In some embodiments of this application, the aforementioned historical LTM information may include at least one of the following: identification information of at least one LTM cell traversed by the terminal; LTM cell handover interval of the terminal; and dwell time of the terminal in at least one LTM cell traversed.

[0340] In some embodiments of this application, the first network-side device may determine at least one of the terminal's mobility state and the terminal's mobility direction based on historical LTM information.

[0341] In some embodiments of this application, the first network-side device can maintain the terminal's context information.

[0342] In some embodiments of this application, the first network-side device can send the context information of the terminal as handover assistance information between network-side devices for handover decision.

[0343] In some embodiments of this application, when the terminal reports the aforementioned second information, the switching assistance information may also include the second information.

[0344] In some embodiments of this application, at least one LTM cell passed by the terminal can be indicated by at least one of the following: TRP identification information; LTM configuration identification; beam indicated by TCI status; beam indicated by DL and UL TCI status; identification information of the DU and / or CU to which the LTM cell belongs.

[0345] In some embodiments of this application, the LTM configuration identifier mentioned above may be a configuration ID that indicates a cell candidate configuration index.

[0346] In this way, by maintaining the context information of the terminal, the first network-side device can perform measurement configuration and sequential switching based on the context information of the terminal, thereby improving the terminal's handover success rate and communication performance.

[0347] In some embodiments of this application, the communication method provided in this application may further include the following step 208.

[0348] Step 208: The first network-side device determines the first network object based on the context information of the terminal.

[0349] The first network object mentioned above is a network object among at least one network object.

[0350] It should be noted that for a detailed description of step 208 above, please refer to the relevant descriptions of steps 103 and 104 above. To avoid repetition, it will not be repeated here.

[0351] In this way, the terminal's mobility status or direction of movement can be determined based on historical LTM information. Thus, based on the deployment information and direction of movement of at least one network object, an LTM cell matching the terminal's mobility status can be identified. For example, during terminal movement, the terminal can accurately switch to an LTM cell located in its direction of movement, thereby avoiding terminal handover failure and improving the terminal's communication performance and quality.

[0352] The communication method provided in this application can be executed by a communication device. This application uses the example of a communication device executing the communication method to illustrate the communication device provided in this application.

[0353] This application provides a communication device. As an example, the 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.

[0354] The 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.

[0355] For details, see Figure 13 When the communication device is a terminal or a component within a terminal, the communication device 130 includes a processing module 131 for acquiring deployment information of at least one network object, the at least one network object including at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), at least one beam; and for performing a first operation based on the deployment information; wherein the first operation includes at least one of the following: sending first information, the first information indicating the LTM cell to be switched; conditional LTM switching; continuous LTM switching.

[0356] In one possible implementation, the aforementioned at least one network object is indicated by at least one of the following:

[0357] TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information;

[0358] The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

[0359] In one possible implementation, the above deployment information includes: identifiers of at least one network object sequentially indicated according to the arrangement order of at least one network object.

[0360] In one possible implementation, the above deployment information is used to indicate at least one of the following:

[0361] The arrangement of at least one network object in the first direction;

[0362] In at least one network object, there are adjacent network objects among the network objects.

[0363] In one possible implementation, at least one of the aforementioned network objects is a network object within a high-speed cell;

[0364] Alternatively, at least one network object is a network object used to cover a fixed route.

[0365] In one possible implementation, the above-mentioned device further includes: a receiving module;

[0366] The aforementioned receiving module is used to receive second information from the first network-side device, the second information including deployment information;

[0367] The second piece of information includes at least one of the following:

[0368] Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

[0369] In one possible implementation, the first operation described above includes sending first information;

[0370] The aforementioned device also includes: a transmitting module;

[0371] The aforementioned sending module is used to send first information to the first network-side device based on the deployment information.

[0372] In one possible implementation, the first operation described above includes conditional LTM handover, where at least one network object includes at least one LTM candidate cell, and the at least one LTM candidate cell includes a first LTM candidate cell.

[0373] The aforementioned processing module 131 is specifically used to perform conditional LTM handover to the first LTM candidate cell based on deployment information.

[0374] In one possible implementation, the first operation described above also includes condition switching;

[0375] The aforementioned processing module 131 is specifically used for at least one of the following:

[0376] Based on deployment information, perform conditional LTM handover within or between cells;

[0377] Based on the deployment information, the execution conditions are switched to the first cell, and the first LTM candidate cell is selected from the first cell for access.

[0378] In one possible implementation, the aforementioned sending module is used to send third information to the first network-side device, the third information including at least one of the following:

[0379] The first request is used to request sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; the first indication information is used to instruct the terminal to move along a fixed route; and the historical LTM information is used to instruct the terminal to perform historical LTM handover.

[0380] In one possible implementation, the processing module 131 is further configured to determine the direction of movement of the terminal based on historical LTM information.

[0381] In one possible implementation, the aforementioned historical LTM information includes at least one of the following:

[0382] The identification information of at least one LTM cell traversed by the terminal; the handover interval of the terminal's LTM cell; and the dwell time of the terminal in at least one LTM cell traversed.

[0383] See Figure 14 When the communication device is a network-side device or a component of a network-side device, the communication device 140 includes a transmitting module 141 for transmitting deployment information of at least one network object to a terminal. The at least one network object includes at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), and at least one beam.

[0384] In one possible implementation, the aforementioned at least one network object is indicated by at least one of the following:

[0385] TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information;

[0386] The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

[0387] In one possible implementation, the above deployment information includes: identifiers of at least one network object sequentially indicated according to the arrangement order of at least one network object.

[0388] In one possible implementation, the above deployment information is used to indicate at least one of the following:

[0389] The arrangement of at least one network object in the first direction;

[0390] In at least one network object, there are adjacent network objects among the network objects.

[0391] In one possible implementation, at least one of the aforementioned network objects is a network object within a high-speed cell;

[0392] Alternatively, at least one network object is a network object used to cover a fixed route.

[0393] In one possible implementation, the aforementioned deployment information carries the second information;

[0394] The second piece of information includes at least one of the following:

[0395] Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

[0396] In one possible implementation, the above-mentioned device further includes: a receiving module;

[0397] The receiving module is used to receive first information from the terminal, which indicates the LTM cell to be switched.

[0398] In one possible implementation, the aforementioned sending module 141 is further configured to send an LTM cell handover command to the terminal;

[0399] The LTM cell handover command is used to instruct LTM cells to be switched sequentially based on deployment information.

[0400] In one possible implementation, the receiving module described above is configured to receive third information from the terminal, the third information including at least one of the following:

[0401] The first request is used to request sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; the first indication information is used to instruct the terminal to move along a fixed route; and the historical LTM information is used to instruct the terminal to perform historical LTM handover.

[0402] In one possible implementation, the aforementioned third information includes the terminal's movement route;

[0403] The deployment information includes the deployment information of the LTM cell corresponding to the terminal's movement route.

[0404] In one possible implementation, the sending module 141 is further configured to send fourth information to the second network-side device;

[0405] The fourth piece of information includes at least one of the following:

[0406] The terminal's mobility status; a second request, which requests sequential handover of LTM cells; a second indication, which instructs the terminal to move along a fixed route; historical LTM information, which indicates the terminal's historical information for LTM handover; and the terminal's direction of movement.

[0407] In one possible implementation, the aforementioned fourth information is carried in the terminal context request message.

[0408] In one possible implementation, the above-mentioned device further includes: a processing module;

[0409] The aforementioned processing module is used to save the terminal's context information, which includes at least one of the following: the terminal's historical LTM information, the terminal's movement status, and the terminal's movement direction.

[0410] Among them, historical LTM information is used to indicate the historical information of the terminal during LTM cell handover.

[0411] In one possible implementation, the aforementioned processing module is further configured to determine the terminal's mobility status or mobility direction based on historical LTM information.

[0412] In one possible implementation, the aforementioned historical LTM information includes at least one of the following:

[0413] Identification information of at least one LTM cell traversed by the terminal;

[0414] LTM cell handover interval of the terminal;

[0415] The duration of the terminal's stay in at least one LTM cell it passes through.

[0416] In one possible implementation, the above-mentioned processing module is used to determine a first network object based on the context information of the terminal, wherein the first network object is a network object among at least one network object.

[0417] The communication device provided in this application embodiment allows the terminal to obtain deployment information of at least one network object. Therefore, during LTM handover, the terminal can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of that network object. Thus, by performing a first operation, the terminal can switch to the network object matching its own state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality.

[0418] The communication device provided in this application embodiment can implement the various processes implemented in the above-described communication method embodiment and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0419] like Figure 15 As shown in the illustration, this application also provides a communication device 1500, including a processor 1501 and a memory 1502. The memory 1502 stores a program or instructions that can run on the processor 1501. For example, when the communication device 1500 is a terminal, the program or instructions executed by the processor 1501 implement the various steps of the above-described communication method embodiments and achieve the same technical effect. When the communication device 1500 is a network-side device, the program or instructions executed by the processor 1501 implement the various steps of the above-described communication method embodiments and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0420] This application embodiment 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, for example... Figure 4 The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 13 The communication device shown. Specifically, Figure 16 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0421] The terminal 1600 includes, but is not limited to, at least some of the following components: radio frequency unit 1601, network module 1602, audio output unit 1603, input unit 1604, sensor 1605, display unit 1606, user input unit 1607, interface unit 1608, memory 1609, and processor 1610.

[0422] Those skilled in the art will understand that the terminal 1600 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 1610 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 16 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.

[0423] It should be understood that, in this embodiment, the input unit 1604 may include a graphics processor 16041 and a microphone 16042. The graphics processor 16041 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 1606 may include a display panel 16061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1607 includes at least one of a touch panel 16071 and other input devices 16072. The touch panel 16071 is also called a touch screen. The touch panel 16071 may include a touch detection device and a touch controller. Other input devices 16072 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.

[0424] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1601 can transmit it to the processor 1610 for processing; in addition, the radio frequency unit 1601 can send uplink data to the network-side device. Typically, the radio frequency unit 1601 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0425] The memory 1609 can be used to store software programs or instructions, as well as various data. The memory 1609 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 1609 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 1609 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0426] Processor 1610 may include one or more processing units; optionally, processor 1610 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 processor 1610.

[0427] The processor 1610 is configured to acquire deployment information of at least one network object, the at least one network object including at least one of the following: at least one LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), at least one beam; and to perform a first operation based on the deployment information; wherein the first operation includes at least one of the following: sending first information, the first information being used to indicate the LTM cell to be switched; conditional LTM switching; continuous LTM switching.

[0428] In one possible implementation, the aforementioned at least one network object is indicated by at least one of the following:

[0429] TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information;

[0430] The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

[0431] In one possible implementation, the above deployment information includes: identifiers of at least one network object sequentially indicated according to the arrangement order of at least one network object.

[0432] In one possible implementation, the above deployment information is used to indicate at least one of the following:

[0433] The arrangement of at least one network object in the first direction;

[0434] Among the at least one network object, each network object is an adjacent network object.

[0435] In one possible implementation, at least one of the aforementioned network objects is a network object within a high-speed cell;

[0436] Alternatively, at least one network object is a network object used to cover a fixed route.

[0437] In one possible implementation, the radio frequency unit 1601 is used to receive second information from a first network-side device, the second information including deployment information;

[0438] The second piece of information includes at least one of the following:

[0439] Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

[0440] In one possible implementation, the first operation described above includes sending first information;

[0441] The aforementioned radio frequency unit 1601 is used to send first information to the first network-side device based on deployment information.

[0442] In one possible implementation, the first operation described above includes conditional LTM handover, where at least one network object includes at least one LTM candidate cell, and the at least one LTM candidate cell includes a first LTM candidate cell.

[0443] The aforementioned processor 1610 is specifically used to perform conditional LTM handover to the first LTM candidate cell based on deployment information.

[0444] In one possible implementation, the first operation described above also includes condition switching;

[0445] The aforementioned processor 1610 is specifically used for at least one of the following:

[0446] Based on deployment information, perform conditional LTM handover within or between cells;

[0447] Based on the deployment information, the execution conditions are switched to the first cell, and the first LTM candidate cell is selected from the first cell for access.

[0448] In one possible implementation, the radio frequency unit 1601 is used to send third information to the first network-side device, the third information including at least one of the following:

[0449] The first request is used to request sequential handover of LTM cells; the terminal's mobility status; the terminal's mobility route; the terminal's mobility direction; the first indication information is used to instruct the terminal to move along a fixed route; and the historical LTM information is used to instruct the terminal to perform historical LTM handover.

[0450] In one possible implementation, the processor 1610 is also used to determine the direction of movement of the terminal based on historical LTM information.

[0451] In one possible implementation, the aforementioned historical LTM information includes at least one of the following:

[0452] The identification information of at least one LTM cell traversed by the terminal; the handover interval of the terminal's LTM cell; and the dwell time of the terminal in at least one LTM cell traversed.

[0453] The terminal provided in this application embodiment can obtain deployment information of at least one network object. Therefore, when the terminal performs an LTM handover, it can accurately determine the network object matching its own state from among the at least one network object based on the deployment information of the at least one network object. Thus, by performing a first operation, the terminal can switch to the network object matching its own state. For example, during terminal movement, the terminal can accurately switch to the network object located in its direction of movement, thereby avoiding handover failure and improving the terminal's communication performance and quality.

[0454] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0455] 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... Figure 12 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0456] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 14 The communication device shown. (As shown) Figure 17 As shown, the network-side device 1700 includes: an antenna 171, a radio frequency (RF) device 172, a baseband device 173, a processor 174, and a memory 175. The antenna 171 is connected to the RF device 172. In the uplink direction, the RF device 172 receives information through the antenna 171 and transmits the received information to the baseband device 173 for processing. In the downlink direction, the baseband device 173 processes the information to be transmitted and sends it to the RF device 172. The RF device 172 processes the received information and transmits it through the antenna 171.

[0457] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 173, which includes a baseband processor.

[0458] Baseband device 173 may include, for example, at least one baseband board on which multiple chips are disposed, such as Figure 17 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 175 via a bus interface to call the program in the memory 175 and execute the network device operation shown in the above method embodiment.

[0459] The network-side device may also include a network interface 176, such as a Common Public Radio Interface (CPRI).

[0460] Specifically, the network-side device 1700 in this application embodiment further includes: instructions or programs stored in memory 175 and executable on processor 174, wherein processor 174 calls the instructions or programs in memory 175 to execute. Figure 14 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0461] 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 communication method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0462] The processor mentioned above is the processor in the terminal described in the above embodiments. 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.

[0463] 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 communication method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0464] 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.

[0465] 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 communication method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0466] This application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the communication method described above, and the network-side device can be used to perform the steps of the communication method described above.

[0467] 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.

[0468] 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.

[0469] 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 communication method, characterized in that, include: The terminal obtains deployment information of at least one network object, wherein the at least one network object includes at least one of the following: at least one Layer 1 or Layer 2 triggered Mobility LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), and at least one beam. The terminal performs a first operation based on the deployment information; The first operation includes at least one of the following: Send a first message, which is used to indicate the LTM cell to which handover is desired; Conditional LTM switching; Continuous LTM switching.

2. The method according to claim 1, characterized in that, The at least one network object is indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information; The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

3. The method according to claim 1 or 2, characterized in that, The deployment information includes: the identifiers of the at least one network object, arranged in the order of their placement.

4. The method according to any one of claims 1 to 3, characterized in that, The deployment information is used to indicate at least one of the following: The arrangement of the at least one network object in the first direction; Among the at least one network object, each network object is an adjacent network object.

5. The method according to any one of claims 1 to 4, characterized in that, The at least one network object is a network object within a high-speed cell; Alternatively, the at least one network object may be a network object used to cover a fixed route.

6. The method according to any one of claims 1 to 5, characterized in that, The terminal obtains deployment information of at least one network object, including: The terminal receives second information from the first network-side device, the second information including the deployment information; The second information includes at least one of the following: Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

7. The method according to any one of claims 1 to 6, characterized in that, The first operation includes sending first information; Based on the deployment information, the terminal performs a first operation, including: Based on the deployment information, the terminal sends the first information to the first network-side device.

8. The method according to any one of claims 1 to 6, characterized in that, The first operation includes conditional LTM handover, wherein the at least one network object includes the at least one LTM candidate cell, and the at least one LTM candidate cell includes a first LTM candidate cell; Based on the deployment information, the terminal performs a first operation, including: Based on the deployment information, the terminal performs a conditional LTM handover to the first LTM candidate cell.

9. The method according to claim 8, characterized in that, The first operation also includes condition switching; Based on the deployment information, the terminal performs a first operation, including at least one of the following: Based on the deployment information, the terminal performs conditional LTM handover within or between cells; Based on the deployment information, the terminal performs a conditional switch to the first cell and selects the first LTM candidate cell from the first cell for access.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: The terminal sends third information to the first network-side device, the third information including at least one of the following: The first request is used to request sequential handover of LTM cells; The mobile status of the terminal; The terminal's movement route; The direction of movement of the terminal; The first instruction information is used to instruct the terminal to move along a fixed route; Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching.

11. The method according to any one of claims 1 to 10, characterized in that, The method further includes: The terminal determines its direction of movement based on historical LTM information, which is used to indicate historical information for LTM switching.

12. The method according to claim 10 or 11, characterized in that, The historical LTM information includes at least one of the following: The terminal passes through the identification information of at least one LTM cell; The handover interval of the LTM cell of the terminal; The duration of the terminal's stay in at least one LTM cell it passes through.

13. A communication method, characterized in that, include: The first network-side device sends deployment information of at least one network object to the terminal. The at least one network object includes at least one of the following: at least one Layer 1 or Layer 2 triggered mobility LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), and at least one beam.

14. The method according to claim 13, characterized in that, The at least one network object is indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information; The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

15. The method according to claim 11 or 12, characterized in that, The deployment information includes: the identifiers of the at least one network object, arranged in the order of their placement.

16. The method according to any one of claims 13 to 15, characterized in that, The deployment information is used to indicate at least one of the following: The arrangement of the at least one network object in the first direction; Among the at least one network object, each network object is an adjacent network object.

17. The method according to any one of claims 13 to 16, characterized in that, The at least one network object is a network object within a high-speed cell; Alternatively, the at least one network object may be a network object used to cover a fixed route.

18. The method according to any one of claims 13 to 16, characterized in that, The deployment information carries the second information; The second information includes at least one of the following: Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

19. The method according to any one of claims 13 to 18, characterized in that, The method further includes: The first network-side device receives first information from the terminal, the first information being used to indicate the LTM cell to which handover is desired.

20. The method according to claim 19, characterized in that, The method further includes: The first network-side device sends an LTM cell handover command to the terminal; The LTM cell handover command is used to instruct the sequential handover of LTM cells based on the deployment information.

21. The method according to any one of claims 13 to 20, characterized in that, The method further includes: The first network-side device receives third information from the terminal, the third information including at least one of the following: The first request is used to request sequential handover of LTM cells; The mobile status of the terminal; The terminal's movement route; The direction of movement of the terminal; The first instruction information is used to instruct the terminal to move along a fixed route; Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching.

22. The method according to claim 21, characterized in that, The third piece of information includes the terminal's movement route; The deployment information includes the deployment information of the LTM cell corresponding to the terminal's movement route.

23. The method according to any one of claims 13 to 22, characterized in that, The method further includes: The first network-side device sends the fourth information to the second network-side device; The fourth information includes at least one of the following: The mobile status of the terminal; The second request is used to request sequential handover of LTM cells; The second instruction information is used to instruct the terminal to move along a fixed route. Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching; The direction of movement of the terminal.

24. The method according to claim 23, characterized in that, The fourth piece of information is carried in the terminal context request message.

25. The method according to any one of claims 13 to 24, characterized in that, The method further includes: The first network-side device stores the context information of the terminal, which includes at least one of the following: the terminal's historical LTM information, the terminal's movement status, and the terminal's movement direction; The historical LTM information is used to indicate the historical information of the terminal during LTM cell handover.

26. The method according to any one of claims 13 to 25, characterized in that, The method further includes: The first network-side device determines the mobility status or mobility direction of the terminal based on historical LTM information, which is used to indicate the historical information for the terminal to perform LTM handover.

27. The method according to any one of claims 23 to 26, characterized in that, The historical LTM information includes at least one of the following: The terminal passes through the identification information of at least one LTM cell; The LTM cell handover interval of the terminal; The duration of the terminal's stay in at least one LTM cell it passes through.

28. The method according to any one of claims 25 to 27, characterized in that, The method further includes: The first network-side device determines a first network object based on the context information of the terminal, wherein the first network object is a network object among the at least one network object.

29. A communication device, characterized in that, include: Processing module; The processing module is used to obtain deployment information of at least one network object, wherein the at least one network object includes at least one of the following: at least one Layer 1 or Layer 2 triggered mobility LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), and at least one beam. The processing module is further configured to perform a first operation based on the deployment information; The first operation includes at least one of the following: Send a first message, which is used to indicate the LTM cell to which handover is desired; Conditional LTM switching; Continuous LTM switching.

30. The apparatus according to claim 29, characterized in that, The at least one network object is indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information; The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

31. The apparatus according to claim 29 or 30, characterized in that, The deployment information includes: the identifiers of the at least one network object, arranged in the order of their placement.

32. The apparatus according to any one of claims 29 to 31, characterized in that, The deployment information is used to indicate at least one of the following: The arrangement of the at least one network object in the first direction; Among the at least one network object, each network object is an adjacent network object.

33. The apparatus according to any one of claims 29 to 32, characterized in that, The at least one network object is a network object within a high-speed cell; Alternatively, the at least one network object may be a network object used to cover a fixed route.

34. The apparatus according to any one of claims 29 to 33, characterized in that, The device further includes: a receiving module; The receiving module is used to receive second information from the first network-side device, the second information including the deployment information; The second information includes at least one of the following: Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

35. The apparatus according to any one of claims 29 to 34, characterized in that, The first operation includes sending first information; The device further includes: a transmitting module; The sending module is used to send the first information to the first network-side device based on the deployment information.

36. The apparatus according to any one of claims 29 to 34, characterized in that, The first operation includes conditional LTM handover, wherein the at least one network object includes the at least one LTM candidate cell, and the at least one LTM candidate cell includes a first LTM candidate cell; The processing module is specifically used to perform conditional LTM switching to the first LTM candidate cell based on the deployment information.

37. The apparatus according to claim 36, characterized in that, The first operation also includes condition switching; The terminal processing module is specifically used for at least one of the following: Based on the deployment information, perform conditional LTM handover within or between cells; Based on the deployment information, the execution condition is switched to the first cell, and the first LTM candidate cell is selected from the first cell for access.

38. The apparatus according to any one of claims 29 to 37, characterized in that, The device further includes: a transmitting module; The sending module is configured to send third information to the first network-side device, the third information including at least one of the following: The first request is used to request sequential handover of LTM cells; The mobile status of the terminal; The terminal's movement route; The direction of movement of the terminal; The first instruction information is used to instruct the terminal to move along a fixed route; Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching.

39. The apparatus according to any one of claims 29 to 38, characterized in that, The processing module is further configured to determine the movement direction of the terminal based on historical LTM information, wherein the historical LTM information is used to indicate historical information for the terminal to perform LTM switching.

40. The apparatus according to claim 38 or 39, characterized in that, The historical LTM information includes at least one of the following: The terminal passes through the identification information of at least one LTM cell; The handover interval of the LTM cell of the terminal; The duration of the terminal's stay in at least one LTM cell it passes through.

41. A communication device, characterized in that, include: Sending module; The sending module is used to send deployment information of at least one network object to the terminal. The at least one network object includes at least one of the following: at least one Layer 1 or Layer 2 triggered mobility LTM cell, at least one LTM candidate cell, at least one Transmit Receive Point (TRP), and at least one beam.

42. The apparatus according to claim 41, characterized in that, The at least one network object is indicated by at least one of the following: TRP identification information, LTM configuration identification information, first beam, second beam, cell identification information; The first beam is the beam indicating the Transmission Configuration Indicator (TCI) status, and the second beam is the beam indicating the downlink TCI status and the uplink TCI status.

43. The apparatus according to claim 41 or 42, characterized in that, The deployment information includes: the identifiers of the at least one network object, arranged in the order of their placement.

44. The apparatus according to any one of claims 41 to 43, characterized in that, The deployment information is used to indicate at least one of the following: The arrangement of the at least one network object in the first direction; Among the at least one network object, each network object is an adjacent network object.

45. The apparatus according to any one of claims 41 to 44, characterized in that, The at least one network object is a network object within a high-speed cell; Alternatively, the at least one network object may be a network object used to cover a fixed route.

46. ​​The apparatus according to any one of claims 41 to 45, characterized in that, The deployment information carries the second information; The second information includes at least one of the following: Measurement configuration information, LTM candidate configuration information, and Radio Resource Control (RRC) reconfiguration message.

47. The apparatus according to any one of claims 41 to 46, characterized in that, The device further includes: The first network-side device receives first information from the terminal, the first information being used to indicate the LTM cell to which handover is desired.

48. The apparatus according to claim 47, characterized in that, The sending module is also used to send an LTM cell handover command to the terminal; The LTM cell handover command is used to instruct the sequential handover of LTM cells based on the deployment information.

49. The apparatus according to any one of claims 41 to 48, characterized in that, The device further includes: a receiving module; The receiving module is configured to receive third information from the terminal, the third information including at least one of the following: The first request is used to request sequential handover of LTM cells; The mobile status of the terminal; The terminal's movement route; The direction of movement of the terminal; The first instruction information is used to instruct the terminal to move along a fixed route; Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching.

50. The apparatus according to claim 49, characterized in that, The third piece of information includes the terminal's movement route; The deployment information includes the deployment information of the LTM cell corresponding to the terminal's movement route.

51. The apparatus according to any one of claims 41 to 50, characterized in that, The sending module is also used to send fourth information to the second network-side device; The fourth information includes at least one of the following: The mobile status of the terminal; The second request is used to request sequential handover of LTM cells; The second instruction information is used to instruct the terminal to move along a fixed route. Historical LTM information, which is used to indicate the historical information of the terminal during LTM switching; The direction of movement of the terminal.

52. The apparatus according to claim 51, characterized in that, The fourth piece of information is carried in the terminal context request message.

53. The apparatus according to any one of claims 41 to 52, characterized in that, The device further includes: a processing module; The processing module is used to save the context information of the terminal, which includes at least one of the following: the historical LTM information of the terminal, the movement state of the terminal, and the movement direction of the terminal; The historical LTM information is used to indicate the historical information of the terminal during LTM cell handover.

54. The apparatus according to any one of claims 41 to 53, characterized in that, The device further includes: a processing module; The processing module is used to determine the mobility status or mobility direction of the terminal based on historical LTM information, wherein the historical LTM information is used to indicate historical information for the terminal to perform LTM switching.

55. The apparatus according to any one of claims 51 to 54, characterized in that, The historical LTM information includes at least one of the following: The terminal passes through the identification information of at least one LTM cell; The LTM cell handover interval of the terminal; The duration of the terminal's stay in at least one LTM cell it passes through.

56. The apparatus according to any one of claims 53 to 55, characterized in that, The device further includes: a processing module; The processing module is configured to determine a first network object based on the context information of the terminal, wherein the first network object is a network object among the at least one network object.

57. A terminal, 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 communication method as described in any one of claims 1 to 12.

58. 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 communication method as described in any one of claims 13 to 28.

59. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the communication method as described in any one of claims 1 to 12, or implement the steps of the communication method as described in any one of claims 13 to 28.

60. A computer program product stored in a storage medium, the computer program product being executed by at least one processor to implement the communication method as claimed in any one of claims 1 to 11, or to implement the steps of the communication method as claimed in any one of claims 13 to 28.

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