Processing method, communication device and storage medium

Abstract

According to the technical scheme provided by the invention, the random access-free conditional switching and / or conditional LTM switching are / is executed in response to the fact that the first condition is met, and the conditional switching and / or conditional LTM switching method supporting random access-free is provided, so that the situation that service interruption is prolonged due to the fact that the terminal equipment executes random access is avoided.

Description

Processing method, communication device and storage medium

[0001] Priority Declaration

[0002] This application is based on the prior international patent application. In the current patent application, the priority of the international patent application with application number "PCT / CN2023 / 113567" and application name "Processing Method, Communication Equipment and Storage Medium" filed on August 17, 2023 is claimed in accordance with the law, and all the contents are incorporated into this application by reference. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a processing method, communication equipment, and storage medium. Background Art

[0004] Conditional Handover (CHO) is a handover method in which a candidate cell is separated from the original cell and then connected to the target cell after the execution conditions are met.

[0005] During the process of conceiving and implementing this application, the inventors discovered that there are at least the following problems: the existing conditional switching and conditional LTM (L1 / L2 Triggered Mobility) switching methods do not support random access-free, so the terminal device needs to perform random access when performing conditional switching, which may cause the service interruption time to be extended.

[0006] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Technical Solutions

[0007] The main purpose of this application is to provide a processing method, a communication device and a storage medium, aiming to provide a conditional switching and / or conditional LTM switching method that supports random access-free to avoid extended service interruption.

[0008] To achieve the above objectives, the present application provides a processing method that can be applied to a terminal device (such as a mobile phone), comprising the steps of:

[0009] S2: In response to the first condition being met, performing random access-free conditional handover and / or conditional LTM handover.

[0010] Optionally, the performing of random access-free conditional switching and / or conditional LTM switching includes:

[0011] Performing random access-free conditional handover and / or conditional LTM handover based on feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or,

[0012] Based on the measured TA value, random access-free conditional handover and / or conditional LTM handover are performed.

[0013] Optionally, satisfying the first condition includes at least one of the following:

[0014] Determining that at least one candidate cell meets the conditional handover execution condition;

[0015] Determining that at least one candidate cell satisfies a conditional LTM handover execution condition;

[0016] Receiving downlink control information;

[0017] Receiving radio resource control reconfiguration signaling;

[0018] The conditional handover configuration carries indication information that the TA value of the candidate cell is zero and / or indication information that the TA value of the candidate cell is the same as that of the serving cell;

[0019] The conditional LTM handover configuration carries indication information that the TA value of the candidate LTM cell is zero and / or indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0020] Optionally, the method further comprises at least one of the following:

[0021] The feedback information is carried in the random access response and / or LTM handover command;

[0022] The feedback information includes the candidate cell TA value and / or the candidate LTM cell TA value;

[0023] The downlink control information includes at least one of index information, random access configuration, and reference signal configuration;

[0024] The radio resource control reconfiguration signaling includes at least one of the serving cell TA value, the conditional handover configuration of at least one candidate cell, the conditional LTM handover configuration, the terminal equipment measured TA value identifier, and the compensation value.

[0025] Optionally, the terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell.

[0026] Optionally, the measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0027] Optionally, the conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0028] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0029] Optionally, the random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identity.

[0030] Optionally, the LTM handover command carries at least one of a TA value, uplink scheduling, configuration scheduling information, and a radio temporary identity of at least one candidate LTM cell.

[0031] Optionally, the index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0032] Optionally, in response to the measurement condition being met, the terminal device initiates terminal device measurement of a TA value for at least one candidate cell.

[0033] Optionally, the method further comprises at least one of the following:

[0034] The system information of the corresponding candidate cell is obtained according to the candidate cell configuration parameters and / or the candidate LTM cell configuration parameters;

[0035] Performing random access-free access based on the candidate cell TA value and / or the candidate LTM cell TA value;

[0036] Perform conditional switch evaluation based on conditional switch configuration;

[0037] Perform conditional LTM switching evaluation based on the conditional LTM switching configuration;

[0038] Applying candidate cell configuration parameters and / or candidate LTM cell configuration parameters;

[0039] Save conditional switching configuration and / or conditional LTM switching configuration;

[0040] The measurement condition includes a TA value identifier of a terminal device measured in at least one candidate cell configuration, and / or the TA value identifier of a terminal device measured in at least one candidate cell configuration is the same as the TA value identifier of a terminal device measured in the current serving cell configuration;

[0041] The measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0042] The present application also provides a processing method, which can be applied to a network device (such as a base station), comprising the steps of:

[0043] S1: Sending first content so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content.

[0044] Optionally, the first content includes at least one of the following:

[0045] Downlink control information;

[0046] Conditional handover configuration of at least one candidate cell;

[0047] Conditional LTM handover configuration for at least one candidate cell;

[0048] TA value of serving cell;

[0049] Terminal equipment measurement TA value identification;

[0050] Compensation value.

[0051] Optionally, the terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell.

[0052] Optionally, the measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0053] Optionally, the method further comprises at least one of the following:

[0054] The conditional handover configuration includes indication information that the candidate cell TA value is zero;

[0055] The conditional handover configuration includes an indication that the candidate cell has the same TA value as the serving cell;

[0056] The conditional LTM handover configuration includes an indication that the TA value of the candidate LTM cell is zero;

[0057] The conditional LTM handover configuration includes indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0058] Optionally, the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content, including:

[0059] The terminal device selects or determines a candidate cell that meets the second condition based on the first content;

[0060] The terminal device sends a random access preamble and / or a reference signal to a candidate cell that meets the second condition, and the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or, the terminal device measures and / or calculates the measured TA value of the candidate cell that meets the second condition, and performs random access-free conditional switching and / or conditional LTM switching based on the measured TA value.

[0061] Optionally, the method further comprises at least one of the following:

[0062] The second condition includes a conditional switch execution condition and / or a conditional LTM switch execution condition;

[0063] The feedback information is carried in the random access response and / or LTM handover command;

[0064] The feedback information includes the candidate cell TA value and / or the candidate LTM cell TA value;

[0065] The downlink control information includes at least one of index information, random access configuration, and reference signal configuration;

[0066] The terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell;

[0067] The measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0068] Optionally, the conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0069] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0070] Optionally, the random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identity.

[0071] Optionally, the LTM handover command carries at least one of a TA value, uplink scheduling, configuration scheduling information, and a radio temporary identity of at least one candidate LTM cell.

[0072] Optionally, the index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0073] Optionally, in response to the measurement condition being met, the terminal device initiates terminal device measurement of a TA value for at least one candidate cell.

[0074] Optionally, the method further comprises at least one of the following:

[0075] Obtaining at least one of a candidate cell TA value, a compensation value, an uplink transmission delay, an uplink scheduling, configuration scheduling information, and a radio temporary identification provided by the candidate cell;

[0076] Calculate the candidate cell TA value based on the uplink transmission delay;

[0077] receiving feedback information corresponding to a random access preamble and / or a reference signal sent by a candidate cell;

[0078] Send feedback information corresponding to the random access preamble and / or reference signal to the terminal device.

[0079] The present application also provides a communication device, comprising: a memory, a processor, and a processing program stored in the memory and executable on the processor, wherein the processing program implements the steps of any of the above-described processing methods when executed by the processor.

[0080] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified in the context.

[0081] The present application also provides a storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any of the above-described processing methods are implemented.

[0082] The technical solution of the present application provides a method for conditional switching and / or conditional LTM switching that supports random access-free by performing random access-free conditional switching and / or conditional LTM switching in response to meeting the first condition, so as to avoid extended service interruption caused by random access performed by the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0084] FIG1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0085] FIG2 is a diagram of a communication network system architecture provided by an embodiment of the present application;

[0086] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application;

[0087] FIG4 is a schematic diagram of the hardware structure of a network node 150 provided in this application;

[0088] FIG5 is a schematic flow chart of a processing method according to the first embodiment;

[0089] FIG6 is a schematic diagram of a conditional switching process in the prior art;

[0090] FIG7 is a schematic diagram of an interaction process according to a second embodiment of the present invention;

[0091] FIG8 is a schematic diagram of an interaction process according to a third embodiment of the present invention;

[0092] FIG9 is a schematic diagram of an interaction process according to a fourth embodiment of the present invention;

[0093] FIG10 is a schematic diagram of an interaction process according to a fifth embodiment of the present invention;

[0094] FIG11 is a schematic diagram of an interaction process according to a sixth embodiment of the present invention;

[0095] FIG12 is a schematic diagram of an interaction process according to a seventh embodiment of the present invention;

[0096] FIG13 is a schematic diagram of an interaction process according to an eighth embodiment of the present invention;

[0097] FIG14 is a schematic diagram of an interaction process according to a ninth embodiment of the present invention;

[0098] FIG15 is a schematic diagram of an interaction process according to an eleventh embodiment of the present invention;

[0099] FIG16 is a schematic flow chart of a processing method according to a twelfth embodiment;

[0100] FIG17 is a first structural diagram of a processing device provided in an embodiment of the present application;

[0101] FIG18 is a second structural diagram of a processing device provided in an embodiment of the present application;

[0102] FIG19 is a schematic diagram of the structure of the communication device provided in an embodiment of the present application.

[0103] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments.

[0104] Implementation Methods of the Application

[0105] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0106] It should be noted that, in this document, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element, and / or, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0107] It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the recited features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0108] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0109] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0110] It should be noted that in this article, step codes such as S1 and S2 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial restriction on the order. When implementing the step, those skilled in the art may execute S2 first and then S1, etc., but these should all be within the scope of protection of this application.

[0111] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0112] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0113] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified based on the context.

[0114] The terminal device may be implemented in various forms. For example, the terminal device described in this application may include intelligent terminal devices such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, and other fixed terminal devices such as digital TVs and desktop computers.

[0115] The subsequent description will be made using a mobile terminal as an example. Those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminal devices.

[0116] Please refer to Figure 1, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application. The mobile terminal 100 may include components such as an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will understand that the mobile terminal structure shown in Figure 1 does not limit the mobile terminal. The mobile terminal may include more or fewer components than shown, or may combine certain components, or arrange the components differently.

[0117] The following is a detailed introduction to the various components of the mobile terminal in conjunction with Figure 1:

[0118] The RF unit 101 can be used to send and receive signals during information transmission or calls. Specifically, it receives downlink information from the base station and transmits it to the processor 110 for processing. It also transmits uplink data to the base station. Typically, the RF unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and / or other components. Furthermore, the RF unit 101 can communicate with the network and other devices via wireless communication. The above-mentioned wireless communications can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), 5G and 6G, etc.

[0119] WiFi is a short-range wireless transmission technology. A mobile terminal, through WiFi module 102, enables users to send and receive emails, browse web pages, and access streaming media, providing wireless broadband Internet access. Although FIG1 illustrates WiFi module 102, it is understood that it is not a required component of the mobile terminal and can be omitted as needed without altering the essence of the invention.

[0120] The audio output unit 103 can convert audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, or the like.

[0121] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos captured by an image capture device (e.g., a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the GPU 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the RF unit 101 or the WiFi module 102. The microphone 1042 may receive sound (audio data) in operating modes such as a phone call mode, a recording mode, and a voice recognition mode, and may process such sound into audio data. In the phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 101. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0122] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described here.

[0123] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0124] The user input unit 107 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 1071) and drive corresponding connected devices according to a pre-set program. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch direction and detects the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 110. It can also receive and execute commands sent by the processor 110. And / or, the touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc., and the specifics are not limited here.

[0125] Optionally, the touch panel 1071 may overlay the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. The processor 110 then provides a corresponding visual output on the display panel 1061 based on the type of touch event. Although in FIG1 , the touch panel 1071 and the display panel 1061 are shown as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited to this specific embodiment.

[0126] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0127] Memory 109 can be used to store software programs and various data. Memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, / or, memory 109 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0128] Processor 110 is the control center of the mobile terminal, connecting all components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 109 and accessing data stored in memory 109, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, processor 110 may integrate an application processor and a modem processor. Optionally, the application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 110.

[0129] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0130] Although not shown in FIG. 1 , the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0131] To facilitate understanding of the embodiments of the present application, the communication network system on which the mobile terminal of the present application is based is described below.

[0132] Please refer to Figure 2, which is a communication network system architecture diagram provided in an embodiment of the present application. The communication network system is an NR (New Radio) system of universal mobile communication technology. The NR system includes UE (User Equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, EPC (Evolved Packet Core) 203 and the operator's IP service 204, which are connected in sequence.

[0133] Optionally, UE201 may be the above-mentioned terminal device 100, which will not be described in detail here.

[0134] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 . Optionally, eNodeB 2021 may be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface). eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 may provide access from UE 201 to EPC 203 .

[0135] EPC 203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving Gate Way) 2034, a PGW (PDN Gate Way) 2035, and a PCRF (Policy and Charging Rules Function) 2036. Optionally, MME 2031 is a control node that processes signaling between UE 201 and EPC 203, providing bearer and connection management. HSS 2032 provides registers for managing functions such as the Home Location Register (not shown) and stores user-specific information such as service features and data rates. All user data can be sent through SGW2034, PGW2035 can provide IP address allocation and other functions for UE 201, PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources, and it selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0136] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services.

[0137] Although the above introduction takes the LTE system as an example, those skilled in the art should know that this application is not only applicable to the LTE system, but can also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., which are not limited here.

[0138] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application. The controller 140 includes a memory 1401 and a processor 1402. The memory 1401 is used to store program instructions, and the processor 1402 is used to call the program instructions in the memory 1401 to execute the steps performed by the controller in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0139] Optionally, the controller further includes a communication interface 1403, which can be connected to the processor 1402 via a bus 1404. The processor 1402 can control the communication interface 1403 to implement the receiving and sending functions of the controller 140.

[0140] Figure 4 is a schematic diagram of the hardware structure of a network node 150 provided in this application. Network node 150 includes: a memory 1501 and a processor 1502. Memory 1501 is used to store program instructions, and processor 1502 is used to call the program instructions in memory 1501 to execute the steps performed by the first node in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0141] Optionally, the controller further includes a communication interface 1503, which can be connected to the processor 1502 via a bus 1504. The processor 1502 can control the communication interface 1503 to implement the receiving and sending functions of the network node 150.

[0142] The integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The software function modules stored in a storage medium include a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute some of the steps of the methods of various embodiments of the present application.

[0143] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive solid state disk, SSD), etc.

[0144] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0145] First embodiment

[0146] 5 , which is a flow chart of a processing method according to a first embodiment, the processing method of the embodiment of the present application can be applied to a terminal device (such as a mobile phone), including the following steps:

[0147] S2: In response to the first condition being met, performing random access-free conditional handover and / or conditional LTM handover.

[0148] Referring to FIG6 , FIG6 is a schematic diagram of a conditional handover process in the prior art. As shown in FIG6 , a conventional conditional handover (CHO) is a handover method in which a candidate cell detaches from the original cell (Detach) after satisfying an execution condition and then establishes a connection with the target cell. The current conditional handover method does not support random access-free. Therefore, failure in any link of the handover process (e.g., random access failure) will result in a service interruption delay. For example, when a terminal evaluates the execution condition and at least one candidate cell satisfies the execution condition, the terminal obtains a system message from the candidate cell and confirms that a random access preamble can be sent (RO, RACH Occasion), thereby resulting in a handover delay (T_IU), where IU refers to interruption uncertainty (Interruption Uncertainly), and / or the time to wait for receiving a random access response after sending a random access preamble (T_RAR), and / or the delay from uplink scheduling obtained based on the random access response to sending the first uplink data (T_FirstData).

[0149] And / or, there is currently no specific method for performing random access-free conditional handover, for example, how to obtain the target cell's Timing Advance (TA) value in advance. And / or, there are currently no clear execution conditions for conditional Layer 1 / Layer 2 Triggered Mobility (LTM) handover.

[0150] In the embodiment of the present application, a conditional switching and / or conditional LTM switching method is introduced to obtain the TA value of the target cell in advance, thereby providing a conditional switching and / or conditional LTM switching method that supports random access-free, which can reduce the interruption delay caused by switching.

[0151] Optionally, in response to satisfying the first condition, performing random access-free conditional switching and / or conditional LTM switching may be:

[0152] In response to satisfying a first condition, sending a random access preamble and / or a reference signal to at least one candidate cell;

[0153] Based on the feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell, random access-free conditional handover and / or conditional LTM handover is performed.

[0154] Optionally, in response to satisfying the first condition, performing random access-free conditional switching and / or conditional LTM switching may be:

[0155] In response to satisfying a first condition, measuring and / or calculating a measured TA value of the candidate cell;

[0156] Based on the measured TA value, random access-free conditional handover and / or conditional LTM handover are performed.

[0157] Optionally, satisfying the first condition includes at least one of the following:

[0158] Determining that at least one candidate cell meets the conditional handover execution condition;

[0159] Determining that at least one candidate cell satisfies a conditional LTM handover execution condition;

[0160] Receiving downlink control information;

[0161] Receiving radio resource control reconfiguration signaling;

[0162] The conditional handover configuration carries indication information that the TA value of the candidate cell is zero and / or indication information that the TA value of the candidate cell is the same as that of the serving cell;

[0163] The conditional LTM handover configuration carries indication information that the TA value of the candidate LTM cell is zero and / or indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0164] Optionally, the terminal device can perform conditional switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional switching execution conditions, a random access preamble is sent to the candidate cell, and a random access response and / or LTM command is received in the serving cell, the target cell configuration parameters are applied, and random access-free conditional switching is performed according to the target cell TA value.

[0165] Optionally, the terminal device can perform conditional LTM switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional LTM switching execution conditions, a random access preamble is sent to the candidate cell, and a random access response and / or LTM command is received in the serving cell. The target cell configuration parameters are applied and random access-free conditional LTM switching is performed according to the target cell TA value.

[0166] Optionally, the terminal device may first receive pre-configuration information, and then trigger random access through a PDCCH (Physical Downlink Control CHannel) order to obtain a target cell TA value in advance.

[0167] Optionally, the terminal device may also first trigger random access through PDCCH order to obtain the target cell TA value in advance, and then perform random access-free conditional switching and / or conditional LTM switching to the target cell according to the target cell TA value and pre-configuration information.

[0168] Optionally, the pre-configuration information received by the terminal device may include target cell TA indication information. If the target cell TA indication information is indication information that the candidate cell TA value is zero and / or indication information that the candidate cell has the same TA value as the serving cell, the terminal device performs conditional switching evaluation based on the pre-configuration information. When at least one target cell meets the execution conditions, the target cell configuration parameters are applied and random access-free conditional switching to the target cell is performed through the target cell TA indication information.

[0169] Optionally, if the target cell TA indication information is indication information that the candidate LTM cell TA value is zero and / or indication information that the candidate LTM cell has the same TA value as the serving cell, the terminal device performs conditional LTM switching evaluation based on pre-configuration information. When at least one target cell meets the execution conditions, the target cell configuration parameters are applied, and random access-free conditional LTM switching is performed to the target cell through the target cell TA indication information.

[0170] Optionally, the terminal device can perform conditional switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional switching execution conditions, an uplink reference signal (SRS, Sounding Reference Signal) is sent to the candidate cell, and a random access response and / or LTM command is received in the serving cell, the target cell configuration parameters are applied, and random access-free conditional switching is performed according to the target cell TA value.

[0171] Optionally, the terminal device can perform conditional LTM switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional LTM switching execution condition, an uplink reference signal is sent to the candidate cell, and a random access response and / or LTM command is received in the serving cell, the target cell configuration parameters are applied, and random access-free conditional LTM switching is performed according to the target cell TA value.

[0172] Optionally, the terminal device receives the pre-configuration information and the uplink reference signal transmission request triggered by the PDCCH order sent by the network device, then sends the SRS to the corresponding target cell, and receives the TA information fed back by the target cell in the original cell. The terminal device performs a conditional handover evaluation based on the TA value of the target cell and the pre-configuration information. When at least one target cell meets the execution conditions, the target cell configuration parameters are applied, and a random access-free conditional handover to the target cell is performed using the target cell TA value.

[0173] Optionally, the terminal device receives pre-configuration information and an uplink reference signal transmission request triggered by a PDCCH order issued by the network device, then sends an SRS to the corresponding target cell and receives TA information fed back by the target cell in the original cell. The terminal device performs conditional LTM handover evaluation based on the target cell TA value and pre-configuration information. When at least one target cell meets the execution conditions, the target cell configuration parameters are applied, and a random access-free conditional LTM handover is performed to the target cell using the target cell TA value.

[0174] Optionally, the terminal device may first trigger SRS sending through a PDCCH order to obtain the target cell TA value in advance, and then provide the target cell TA value and pre-configuration information.

[0175] Optionally, the terminal device may also obtain a target cell system message based on pre-configuration information, and send a random access preamble based on the random access parameters carried in the system message to obtain the target cell TA value in advance.

[0176] Optionally, the terminal device can perform conditional switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional switching execution conditions, the terminal device can initiate TA value measurement for the candidate cell and perform random access-free conditional switching based on the measured TA value of the target cell.

[0177] Optionally, the terminal device can perform conditional LTM switching evaluation based on the received pre-configuration information. When at least one candidate cell meets the conditional LTM switching execution conditions, the terminal device can initiate TA value measurement for the candidate cell and perform random access-free conditional LTM switching based on the measured TA value of the target cell.

[0178] Optionally, the feedback information is carried in a random access response and / or an LTM handover command.

[0179] Optionally, the feedback information includes a candidate cell TA value and / or a candidate LTM cell TA value.

[0180] Optionally, the downlink control information includes at least one of index information, random access configuration, and reference signal configuration.

[0181] Optionally, the radio resource control reconfiguration signaling includes at least one of the TA value of the serving cell, the conditional switching configuration of at least one candidate cell, the conditional LTM switching configuration, the terminal equipment measured TA value identifier, and the compensation value.

[0182] Optionally, the terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell.

[0183] Optionally, the measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0184] Optionally, the conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0185] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0186] Optionally, the random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identity.

[0187] Optionally, the LTM handover command carries at least one of a TA value, uplink scheduling, configuration scheduling information, and a radio temporary identity of at least one candidate LTM cell.

[0188] Optionally, the index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0189] Optionally, in response to the measurement condition being met, the terminal device initiates terminal device measurement of a TA value for at least one candidate cell.

[0190] Optionally, the system information of the corresponding candidate cell is acquired according to the candidate cell configuration parameters and / or the candidate LTM cell configuration parameters.

[0191] Optionally, the system message includes random access parameters and / or reference signal parameters.

[0192] This embodiment introduces a method of obtaining the target cell TA value in advance through conditional handover and / or conditional LTM handover through the above solution.

[0193] Optionally, the random access-free conditional switching includes: not executing the random access process during the conditional switching process, and directly switching to the target cell after the switching condition is met, for example: the candidate cell TA value is zero or the candidate cell TA value has the same TA value as the current serving cell; and / or, before executing the conditional switching, sending a random access preamble and / or reference signal in advance, and after obtaining the candidate cell TA value in the serving cell, directly switching to the target cell according to the obtained TA value after the switching condition is met.

[0194] Optionally, the random access-free conditional LTM switching includes: not executing the random access process during the conditional LTM switching, and directly switching to the target cell after the LTM switching condition is met, for example: the candidate LTM cell TA value is zero or the candidate LTM cell TA value has the same TA value as the current serving cell; and / or, before executing the conditional LTM switching, sending a random access preamble and / or reference signal in advance, and after obtaining the candidate LTM cell TA value in the serving cell, directly switching to the target cell according to the obtained TA value after the LTM switching condition is met.

[0195] This embodiment clarifies the execution conditions of conditional LTM switching through the above solution; and / or performs random access-free switching through the corresponding TA value.

[0196] This embodiment provides a method for conditional switching and / or conditional LTM switching that supports random access-free through the above-mentioned scheme, specifically by performing random access-free conditional switching and / or conditional LTM switching in response to satisfying the first condition, so as to avoid extended service interruption of the terminal device due to performing random access; and / or, performing uplink synchronization in advance before switching, which helps to reduce switching delay.

[0197] Second embodiment

[0198] Based on the first embodiment of the present application, this embodiment further discloses the processing method in the aforementioned embodiment.

[0199] Referring to Figure 7, Figure 7 is a schematic diagram of the interaction process shown in accordance with the second embodiment of the embodiment of the present invention. As shown in Figure 7, the terminal device can send a random access preamble based on the received pre-configuration information to obtain the TA value of the target cell in advance.

[0200] Optionally, the terminal device reports a measurement report (MR), and optionally, the measurement report is a layer 3 (L3) measurement report.

[0201] Optionally, the source cell (including or being the first network device) obtains the candidate cell configuration, including: candidate cell configuration parameters and / or random access parameters.

[0202] Optionally, the candidate cell (including or being the second network device) may be a candidate LTM cell.

[0203] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or random access parameters.

[0204] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, and a candidate cell configuration.

[0205] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0206] Optionally, the conditional handover configuration is sent via RRC (Radio Resource Control) reconfiguration signaling.

[0207] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0208] Optionally, the conditional switching may also be a conditional LTM switching.

[0209] Optionally, the conditional LTM switching configuration includes: a conditional LTM switching configuration index (Conditional LTM configuration index), an LTM execution condition (LTM execution condition) and at least one of the candidate LTM cell configuration parameters.

[0210] Optionally, the source cell may also send common random access parameters for subsequent conditional LTM handover.

[0211] Optionally, the terminal device sends a configuration confirmation message.

[0212] Optionally, the configuration confirmation is sent via RRC reconfiguration complete (RRCReconfigurationComplete) signaling.

[0213] Optionally, the terminal device evaluates candidate cells according to the execution conditions, and sends a random access preamble to at least one candidate cell when the execution conditions are met.

[0214] Optionally, the terminal device may evaluate candidate cells according to the LTM execution condition, and send a random access preamble to at least one candidate LTM cell when the execution condition is met.

[0215] Optionally, after sending the random access preamble, the terminal device returns to the source cell to receive response information.

[0216] Optionally, satisfying the execution condition and / or the LTM execution condition includes: the signal strength satisfies a threshold value, and / or the signal strength satisfies the threshold value and is maintained for a period of time.

[0217] Optionally, the candidate cell receives the random access preamble sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0218] Optionally, the candidate cell may also provide at least one of uplink scheduling (UL Grant), configured scheduling (CG) information, and radio network temporary identification (RNTI) to the source cell. It should be noted that the response information sent may be any interactive signaling between base stations, which is not limited in the embodiments of the present application.

[0219] Optionally, the source cell carries the candidate cell TA value through a random access response (RAR) and / or sends it to the terminal device.

[0220] Optionally, if the terminal device sends a random access preamble to at least one candidate cell and / or candidate LTM cell during the process of sending the random access preamble, the random access response may carry the TA value of the at least one candidate cell and / or candidate LTM cell.

[0221] Optionally, the network device sends at least one RAR to carry the TA value of at least one candidate cell and / or candidate LTM cell.

[0222] Optionally, the random access response may also carry at least one of candidate cell uplink scheduling, configuration scheduling information, and radio temporary identification.

[0223] Optionally, after receiving the TA value of the candidate cell, the terminal device starts a corresponding time advance timer (TAT, Timing Advance Timer).

[0224] Optionally, the source cell may also carry at least one candidate LTM cell TA value through the LTM handover command.

[0225] Optionally, the LTM handover command may further carry at least one of candidate LTM cell uplink scheduling, configuration scheduling information, and radio temporary identification.

[0226] Optionally, the LTM switching command is carried through MAC (Media Access Control) layer signaling, such as MAC subheader and / or MAC CE (Control Element).

[0227] Optionally, the terminal device initiates random access-free (RACH-Less) conditional switching and / or conditional LTM switching based on the received candidate cell TA value and / or candidate LTM cell TA value.

[0228] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions, and initiates random access-free conditional switching or conditional LTM switching when at least one candidate cell still meets the execution conditions or LTM execution conditions and the corresponding TAT is still running.

[0229] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0230] Optionally, when the TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0231] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0232] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching or conditional LTM switching.

[0233] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request acknowledgement (ARQ ACK) and / or an automatic hybrid repeat request acknowledgement (HARQ-ACK), for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0234] Optionally, after receiving the candidate cell confirmation information, the terminal device completes the conditional handover or conditional LTM handover and uses the candidate cell as the serving cell.

[0235] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0236] This embodiment uses the above-mentioned scheme, specifically pre-configuring random access parameters through the network device, so that the terminal device can perform uplink synchronization in advance and / or obtain the TA value of the target cell in advance, and perform random access-free conditional switching and / or conditional LTM switching, eliminating measurement reporting and / or switching signaling, and / or performing early uplink synchronization, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the uplink random access-free conditional switching and / or conditional LTM switching process.

[0237] Third embodiment

[0238] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0239] 8 , which is a schematic diagram of an interaction process according to a third embodiment of the present invention, as shown in FIG8 , the terminal device may first receive pre-configuration information, and then trigger random access through a PDCCH order to obtain the target cell TA value in advance.

[0240] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0241] Optionally, the source cell obtains candidate cell configuration, including: candidate cell configuration parameters and / or random access parameters.

[0242] Optionally, the candidate cell may be a candidate LTM cell.

[0243] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or random access parameters.

[0244] Optionally, obtaining the candidate cell configuration and / or candidate LTM cell configuration can be carried through any interactive signaling between base stations, including but not limited to: UL RRC MESSAGE TRANSFER, HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0245] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, and a candidate cell configuration.

[0246] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0247] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0248] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0249] Optionally, the conditional switching may also be a conditional LTM switching.

[0250] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, and a candidate LTM cell configuration parameter.

[0251] Optionally, the source cell may also send universal random access parameters for subsequent LTM handover.

[0252] Optionally, the terminal device sends a configuration confirmation message.

[0253] Optionally, the configuration confirmation information is sent via RRC reconfiguration completion signaling.

[0254] Optionally, the network device sends DCI via PDCCH to request the terminal device to perform random access triggered by PDCCH-order.

[0255] Optionally, the DCI carries index information and / or random access configuration.

[0256] Optionally, the DCI carries at least one index information and / or random access configuration.

[0257] Optionally, the index information is a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0258] Optionally, after receiving the random access control information triggered by PDCCH-odrer, the terminal device determines the candidate cell and random access parameters based on the index information and the conditional switching configuration, and sends a random access preamble to the candidate cell based on the random access parameters.

[0259] Optionally, the terminal device sends a random access preamble to the candidate cell based on the random access configuration.

[0260] Optionally, the terminal device determines the candidate cell and random access parameters based on the index information and the conditional switching configuration, and the terminal device then sends a random access preamble based on the random access parameters and the random access configuration.

[0261] Optionally, the terminal device receives response information in the source cell after sending the random access preamble.

[0262] Optionally, the terminal device sends a random access preamble to at least one candidate cell based on at least one index information and / or random access configuration.

[0263] Optionally, the terminal device sends a random access preamble to at least one candidate cell based on a PDCCH-order random access triggered by at least one DCI.

[0264] Optionally, the terminal device determines the candidate cell to which the random access preamble is sent based on the index type carried by the DCI. For example, if the index information is a conditional switching configuration index, the random access preamble is sent to the candidate cell.

[0265] Optionally, if the index information is a conditional LTM handover configuration index, a random access preamble is sent to the candidate LTM cell.

[0266] Optionally, the candidate cell receives the random access preamble sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0267] Optionally, the candidate cell may further provide at least one of uplink scheduling, configuration scheduling information, and radio temporary identification to the source cell.

[0268] Optionally, the signaling used by the candidate cell to send the response information may be any interactive signaling between base stations, which is not limited in the embodiments of the present application.

[0269] Optionally, the source cell carries the candidate cell TA value in a random access response and sends it to the terminal device.

[0270] Optionally, if the terminal sends a random access preamble to at least one candidate cell and / or candidate LTM cell during the process of sending a random access preamble, the random access response may carry the TA value of the at least one candidate cell and / or candidate LTM cell.

[0271] Optionally, the network device sends at least one RAR carrying at least one candidate cell and / or candidate LTM cell TA value.

[0272] Optionally, the random access response may also carry at least one of uplink scheduling of the candidate cell and / or candidate LTM cell, configuration scheduling information, and radio temporary identity.

[0273] Optionally, after receiving the TA value of the candidate cell and / or candidate LTM cell, the terminal device starts the corresponding time advance timer.

[0274] Optionally, the source cell may also carry at least one candidate LTM cell TA value through the LTM handover command.

[0275] Optionally, the LTM handover command may further carry at least one of candidate LTM cell uplink scheduling, configuration scheduling information and / or radio temporary identification.

[0276] Optionally, the LTM switching command is carried through MAC layer signaling, such as MAC subheader and / or MAC CE.

[0277] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions and the corresponding TAT is still running, the terminal device initiates random access-free conditional switching based on the received candidate cell TA value, or initiates random access-free conditional LTM switching based on the candidate LTM cell TA value.

[0278] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0279] Optionally, when the execution conditional candidate cell or the conditional LTM candidate cell is satisfied and the corresponding TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0280] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0281] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching or conditional LTM switching.

[0282] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0283] Optionally, after receiving the candidate cell confirmation information, the terminal device completes the conditional switching and / or conditional LTM switching and uses the candidate cell as the serving cell.

[0284] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0285] This embodiment uses the above-mentioned scheme, specifically by pre-configuring random access parameters and / or sending a random access request in advance through the network device, so that the terminal device can obtain the TA value of the target cell in advance, and perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling, flexibly indicating the cells that need to be uplink synchronized in advance, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0286] Fourth embodiment

[0287] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0288] 9 , which is a schematic diagram of an interaction process according to a fourth embodiment of the present invention, as shown in FIG9 , random access may be triggered by a PDCCH order, and then the target cell TA value and pre-configuration information may be provided to the terminal device.

[0289] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0290] Optionally, the source cell obtains candidate cell configuration, including: candidate cell configuration parameters and / or random access parameters.

[0291] Optionally, the candidate cell may be a candidate LTM cell.

[0292] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or random access parameters.

[0293] Optionally, the acquisition of candidate cell configuration and / or candidate LTM cell configuration can be through any interactive signaling between base stations, including but not limited to: UL RRC MESSAGE TRANSFER, HANDOVER REQUEST REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0294] Optionally, the network device sends DCI via PDCCH to require the terminal device to perform random access triggered by PDCCH-order.

[0295] Optionally, the DCI carries random access configuration.

[0296] Optionally, the DCI may also carry at least one index information and / or at least one index random access configuration.

[0297] Optionally, the network device may also trigger the terminal device to send a random access preamble to at least one candidate cell by sending at least one DCI.

[0298] Optionally, after receiving the random access control information triggered by PDCCH-odrer, the terminal device sends a random access preamble to the candidate cell according to the random access configuration.

[0299] Optionally, the terminal device sends a random access preamble to at least one candidate cell based on at least one index information and / or at least one index random access configuration.

[0300] Optionally, the terminal device sends a random access preamble to at least one candidate cell in response to a random access transmission request triggered by at least one DCI.

[0301] Optionally, the candidate cell receives the random access preamble sent by the terminal, calculates a corresponding TA value, and sends response information to the source cell through signaling.

[0302] Optionally, the candidate cell may further provide at least one of uplink scheduling, configuration scheduling information, and radio temporary identification to the source cell.

[0303] Optionally, the signaling may be any interactive signaling between base stations, including but not limited to: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0304] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0305] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0306] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0307] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0308] Optionally, the conditional switching may also be a conditional LTM switching.

[0309] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0310] Optionally, after receiving the TA value of the candidate cell and / or candidate LTM cell, the terminal device starts the corresponding TAT.

[0311] Optionally, the terminal device sends a configuration confirmation message.

[0312] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0313] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions and the corresponding TAT is still running, the terminal device initiates random access-free conditional switching or conditional LTM switching based on the received candidate cell TA value.

[0314] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0315] Optionally, when the execution conditional candidate cell or the conditional LTM candidate cell is satisfied and the corresponding TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0316] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0317] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching.

[0318] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0319] Optionally, the terminal device completes the conditional switching after receiving the candidate cell confirmation information and uses the candidate cell as the serving cell.

[0320] Optionally, after completing the conditional handover or conditional LTM handover, the terminal device still saves the conditional handover configuration and / or conditional LTM handover configuration, and optionally also includes the candidate cell TA value and / or candidate LTM cell TA value.

[0321] This embodiment uses the above-mentioned scheme, specifically through the network device sending a random access request in advance, obtaining the target cell TA value in advance, and providing the target cell TA value and / or configuration parameters in a pre-configuration manner, so that the terminal device can perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling, and flexibly configuring the cell that has performed uplink synchronization in advance, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0322] Fifth embodiment

[0323] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0324] Refer to Figure 10, Figure 10 is a schematic diagram of the interaction process shown in accordance with the fifth embodiment of an embodiment of the present invention. As shown in Figure 10, if the candidate cell and the serving cell have the same TA value or the TA value is equal to 0, the terminal device performs conditional evaluation based on the pre-configuration information. When at least one target cell meets the execution condition, the target cell configuration parameters are applied, and random access-free switching to the target cell is performed through the target cell TA indication information.

[0325] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0326] Optionally, the source cell obtains candidate cell configuration, including: candidate cell configuration parameters and / or TA information.

[0327] Optionally, the TA information includes: the candidate cell and the serving cell have the same TA value, and / or the candidate cell TA value is zero.

[0328] Optionally, the candidate cell may be a candidate LTM cell.

[0329] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or candidate LTM cell TA information.

[0330] Optionally, the candidate LTM cell TA information includes: the candidate LTM cell and the serving cell have the same TA value, and / or the candidate LTM cell TA value is zero.

[0331] Optionally, the acquisition of candidate cell configuration and / or candidate LTM cell configuration can be carried through any interactive signaling between any base stations, including but not limited to: UL RRC MESSAGE TRANSFER, HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0332] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration, and candidate cell TA information.

[0333] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0334] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0335] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0336] Optionally, the conditional switching may also be a conditional LTM switching.

[0337] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration, and candidate LTM cell TA information.

[0338] Optionally, the terminal device sends a configuration confirmation message.

[0339] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0340] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions, the terminal device initiates random access-free conditional switching or conditional LTM switching based on the received candidate cell TA information.

[0341] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0342] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0343] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching.

[0344] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0345] Optionally, the terminal device completes the conditional switching after receiving the candidate cell confirmation information and uses the candidate cell as the serving cell.

[0346] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0347] This embodiment uses the above-mentioned scheme, specifically through the network device to obtain the uplink synchronization information of the switching cell in advance, and provide the uplink synchronization information of the target cell in a pre-configured manner, so that the terminal device can perform conditional switching without random access and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling issuance and / or executing a random access process, and flexibly configures the cells that have been obtained in advance and do not require additional uplink synchronization, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the conditional switching without random access and / or conditional LTM switching process.

[0348] Sixth embodiment

[0349] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0350] Refer to Figure 11, which is a schematic diagram of the interaction process shown in accordance with the sixth embodiment of the present invention. As shown in Figure 11, the terminal device sends an uplink reference signal based on the received pre-configuration information to obtain the TA value of the target cell in advance.

[0351] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0352] Optionally, the source cell obtains the candidate cell configuration, including: candidate cell configuration parameters and / or reference signal parameters.

[0353] Optionally, the candidate cell is a candidate LTM cell.

[0354] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or reference signal parameters.

[0355] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, and a candidate cell configuration parameter.

[0356] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0357] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0358] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0359] Optionally, the conditional switching may also be a conditional LTM switching.

[0360] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, and a candidate LTM cell configuration parameter.

[0361] Optionally, the source cell may also send common reference signal parameters for subsequent conditional LTM handover.

[0362] Optionally, the terminal device sends a configuration confirmation message.

[0363] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0364] Optionally, the terminal device may evaluate candidate cells according to the execution condition, and send an uplink reference signal to at least one candidate cell when the execution condition is met.

[0365] Optionally, the terminal device may evaluate candidate cells according to the LTM execution condition, and send an uplink reference signal to at least one candidate LTM cell when the execution condition is met.

[0366] Optionally, the terminal device receives response information in the source cell after sending the uplink reference signal.

[0367] Optionally, satisfying the execution condition and / or the LTM execution condition includes: the signal strength satisfies a threshold value, and / or the signal strength satisfies the threshold value and is maintained for a period of time.

[0368] Optionally, the candidate cell receives the uplink reference signal sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0369] Optionally, the candidate cell may further provide an uplink transmission delay to the source cell, and the source cell calculates the TA value of the candidate cell according to the transmission delay provided by the candidate cell.

[0370] Optionally, the candidate cell may further provide at least one of uplink scheduling, configuration scheduling information, and radio temporary identification to the source cell.

[0371] Optionally, the signaling may be any interactive signaling between base stations, including but not limited to: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0372] Optionally, the source cell sends a random access response carrying the candidate cell TA value to the terminal device.

[0373] Optionally, if the terminal device sends an uplink reference signal to at least one candidate cell and / or candidate LTM cell during the process of sending the uplink reference signal, the random access response may carry at least one candidate cell TA value.

[0374] Optionally, the network device sends at least one RAR carrying at least one candidate cell and / or candidate LTM cell TA value.

[0375] Optionally, the random access response may also carry at least one of candidate cell uplink scheduling, configuration scheduling information, and radio temporary identification.

[0376] Optionally, after receiving the TA value of the candidate cell, the terminal device starts the corresponding time advance timer.

[0377] Optionally, the source cell may also carry at least one candidate LTM cell TA value through the LTM handover command.

[0378] Optionally, the LTM handover command may further carry at least one of candidate LTM cell uplink scheduling, configuration scheduling information, and radio temporary identification.

[0379] Optionally, the LTM switching command is carried through MAC layer signaling, such as MAC subheader and / or MAC CE.

[0380] Optionally, the terminal device initiates random access-free conditional switching or LTM execution condition based on the received candidate cell TA value and / or candidate LTM cell TA value.

[0381] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions, and initiates random access-free condition switching or LTM execution conditions when at least one candidate cell still meets the execution conditions or LTM execution conditions and the corresponding TAT is still running.

[0382] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0383] Optionally, if the TAT has timed out, random access conditional switching or conditional LTM switching is performed.

[0384] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching or conditional LTM switching.

[0385] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0386] Optionally, after receiving the candidate cell confirmation information, the terminal device completes the conditional handover or conditional LTM handover and uses the candidate cell as the serving cell.

[0387] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0388] This embodiment uses the above-mentioned scheme, specifically pre-configuring reference signal parameters through the network device, so that the terminal device can perform uplink synchronization in advance and / or obtain the TA value of the target cell in advance, and perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling and performing early uplink synchronization, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0389] Seventh embodiment

[0390] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0391] Refer to Figure 12, which is a schematic diagram of the interaction process according to the seventh embodiment of the present invention. As shown in Figure 12, the terminal device first receives the pre-configuration information, and then triggers SRS sending through the PDCCH order to obtain the target cell TA value in advance.

[0392] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0393] Optionally, the source cell obtains the candidate cell configuration, including: candidate cell configuration parameters and / or reference signal parameters.

[0394] Optionally, the candidate cell may be a candidate LTM cell.

[0395] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and reference signal parameters.

[0396] Optionally, the acquisition of candidate cell configuration and / or candidate LTM cell configuration can be carried through any interactive signaling between base stations, including but not limited to: UL RRC MESSAGE TRANSFER, HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0397] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, and a candidate cell configuration parameter.

[0398] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0399] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0400] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0401] Optionally, the conditional switching may also be a conditional LTM switching.

[0402] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, and a candidate LTM cell configuration parameter.

[0403] Optionally, the source cell may also send common reference signal parameters (commmon reference signal parameters) for subsequent LTM handover.

[0404] Optionally, the terminal device sends a configuration confirmation message.

[0405] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0406] Optionally, the network device sends DCI via PDCCH to request the terminal device to execute uplink reference signal transmission triggered by PDCCH-order.

[0407] Optionally, the DCI carries index information and / or reference signal configuration.

[0408] Optionally, the DCI carries at least one index information and / or reference signal configuration.

[0409] Optionally, the index information is a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0410] Optionally, after receiving the reference signal control information triggered by PDCCH-odrer, the terminal device determines the candidate cell and reference signal parameters based on the index information and the conditional switching configuration, and sends an uplink reference signal to the candidate cell based on the reference signal parameters.

[0411] Optionally, the terminal device sends an uplink reference signal to the candidate cell based on the reference signal configuration.

[0412] Optionally, the terminal device determines the candidate cell and reference signal parameters based on the index information and the conditional switching configuration, and then sends an uplink reference signal based on the reference signal parameters.

[0413] Optionally, after sending the uplink reference signal, the terminal device returns to the source cell to receive response information.

[0414] Optionally, the terminal device sends an uplink reference signal to at least one candidate cell based on at least one index information and / or reference signal configuration.

[0415] Optionally, the terminal device sends an uplink reference signal to at least one candidate cell based on a PDCCH-order uplink reference signal triggered by at least one DCI.

[0416] Optionally, the terminal device determines a candidate cell to send an uplink reference signal based on an index type carried by the DCI. For example, if the index information is a conditional switching configuration index, an uplink reference signal is sent to the candidate cell.

[0417] Optionally, if the index information is a conditional LTM switching configuration index, an uplink reference signal is sent to the candidate LTM cell.

[0418] Optionally, the candidate cell receives the uplink reference signal sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0419] Optionally, the candidate cell may further provide at least one of uplink scheduling, configuration scheduling information, and radio temporary identification to the source cell.

[0420] Optionally, the candidate cell may further provide an uplink transmission delay to the source cell, and the source cell calculates the TA value of the candidate cell according to the transmission delay provided by the candidate cell.

[0421] Optionally, the signaling may be any interactive signaling between base stations, including but not limited to: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0422] Optionally, the source cell carries the candidate cell TA value in a random access response and sends it to the terminal device.

[0423] Optionally, if the terminal device sends an uplink reference signal to at least one candidate cell and / or candidate LTM cell during the process of sending the uplink reference signal, the random access response may carry the TA value of at least one candidate cell and / or candidate LTM cell.

[0424] Optionally, the network device sends at least one RAR carrying at least one candidate cell and / or candidate LTM cell TA value.

[0425] Optionally, the random access response may also carry at least one of a candidate cell, a candidate LTM cell uplink scheduling, configuration scheduling information, and a radio temporary identity.

[0426] Optionally, after receiving the TA value of the candidate cell and / or candidate LTM cell, the terminal device starts the corresponding time advance timer.

[0427] Optionally, the source cell may also carry at least one candidate LTM cell TA value through the LTM handover command.

[0428] Optionally, the LTM handover command may further carry at least one of candidate LTM cell uplink scheduling, configuration scheduling information, and radio temporary identification.

[0429] Optionally, the LTM switching command is carried through MAC layer signaling, such as MAC subheader and / or MAC CE.

[0430] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions and the corresponding TAT is still running, the terminal device initiates random access-free conditional switching based on the received candidate cell TA value, and / or initiates random access-free conditional LTM switching based on the candidate LTM cell TA value.

[0431] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0432] Optionally, when the execution conditional candidate cell or the conditional LTM candidate cell is satisfied and the corresponding TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0433] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0434] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching or conditional LTM switching.

[0435] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0436] Optionally, after receiving the candidate cell confirmation information, the terminal device completes the conditional switching and / or conditional LTM switching and uses the candidate cell as the serving cell.

[0437] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0438] This embodiment uses the above-mentioned scheme, specifically by pre-configuring reference signal parameters and / or issuing uplink reference signal requests through network equipment, so that the terminal equipment can obtain the TA value of the target cell in advance, and perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling issuance, flexibly indicating the cells that need to be uplink synchronized in advance, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or explicitly executing the random access-free conditional switching and / or conditional LTM switching process.

[0439] Eighth embodiment

[0440] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0441] 13 , which is a schematic diagram of an interaction process according to the eighth embodiment of the present invention, as shown in FIG13 , SRS sending is first triggered by PDCCH order, and then the target cell TA value and pre-configuration information are provided to the terminal device.

[0442] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0443] Optionally, the source cell obtains the candidate cell configuration, including: candidate cell configuration parameters and / or reference signal parameters.

[0444] Optionally, the candidate cell may be a candidate LTM cell.

[0445] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters and / or reference signal parameters.

[0446] Optionally, the acquisition of candidate cell configuration and / or candidate LTM cell configuration can be carried through any interactive signaling between base stations, including but not limited to: UL RRC MESSAGE TRANSFER, HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0447] Optionally, the network device sends DCI via PDCCH to require the terminal device to perform uplink reference signal transmission triggered by PDCCH-order. Optionally, the DCI carries reference signal configuration.

[0448] Optionally, the DCI may also carry at least one index information and / or at least one reference signal configuration.

[0449] Optionally, the network device may also trigger the terminal device to send an uplink reference signal to at least one candidate cell by sending at least one DCI.

[0450] Optionally, upon receiving the uplink reference signal control information triggered by PDCCH-odrer, the terminal device sends an uplink reference signal to the candidate cell according to the reference signal configuration.

[0451] Optionally, the terminal device sends an uplink reference signal to at least one candidate cell based on at least one index information and / or at least one index reference signal configuration.

[0452] Optionally, the terminal device sends an uplink reference signal to at least one candidate cell in response to an uplink reference signal request triggered by at least one DCI.

[0453] Optionally, the candidate cell receives the uplink reference signal sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0454] Optionally, the candidate cell may further provide an uplink transmission delay to the source cell, and the source cell calculates the TA value of the candidate cell according to the transmission delay provided by the candidate cell.

[0455] Optionally, the candidate cell may further provide at least one of uplink scheduling, configuration scheduling information, and radio temporary identification to the source cell.

[0456] Optionally, the signaling may be any interactive signaling between base stations, including but not limited to: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0457] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0458] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0459] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0460] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0461] Optionally, the conditional switching may also be a conditional LTM switching.

[0462] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0463] Optionally, after receiving the TA value of the candidate cell and / or candidate LTM cell, the terminal device starts the corresponding TAT.

[0464] Optionally, the terminal device sends a configuration confirmation message.

[0465] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0466] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions and the corresponding TAT is still running, the terminal device initiates random access-free conditional switching and / or conditional LTM switching based on the received candidate cell TA value.

[0467] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0468] Optionally, when the execution conditional candidate cell and / or the conditional LTM candidate cell are satisfied and the corresponding TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0469] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0470] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching.

[0471] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0472] Optionally, the terminal device completes the conditional switching after receiving the candidate cell confirmation information and uses the candidate cell as the serving cell.

[0473] Optionally, the terminal device still saves the conditional switching configuration and / or conditional LTM switching configuration after completing the conditional switching or conditional LTM switching. Optionally, the conditional switching configuration includes the candidate cell TA value, and / or the conditional LTM switching configuration includes the candidate LTM cell TA value.

[0474] This embodiment uses the above-mentioned scheme, specifically by sending an uplink reference signal request through the network device, obtaining the TA value of the target cell in advance, and providing the TA value and / or configuration parameters of the target cell in a pre-configured manner, so that the terminal device can perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling, and flexibly configuring the cell that has performed uplink synchronization in advance, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0475] Ninth embodiment

[0476] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0477] Refer to Figure 14, which is a schematic diagram of the interaction process shown in accordance with the ninth embodiment of the embodiment of the present invention. As shown in Figure 14, the terminal device obtains the target cell system message based on the pre-configuration information, and sends a random access preamble based on the random access parameters carried in the system message to obtain the target cell TA value in advance.

[0478] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0479] Optionally, the source cell obtains candidate cell configuration, including: candidate cell configuration parameters.

[0480] Optionally, the candidate cell may be a candidate LTM cell.

[0481] Optionally, the candidate LTM cell configuration includes: candidate LTM cell configuration parameters.

[0482] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, an execution condition, and a candidate cell configuration parameter.

[0483] Optionally, the terminal device receives the conditional switching configuration and saves it locally.

[0484] Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0485] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0486] Optionally, the conditional switching may also be a conditional LTM switching.

[0487] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, and a candidate LTM cell configuration parameter.

[0488] Optionally, the terminal device sends a configuration confirmation message.

[0489] Optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0490] Optionally, the terminal device obtains corresponding system messages according to the candidate cell configuration and / or the candidate LTM cell configuration, where the system messages include random access parameters and / or reference signal parameters.

[0491] Optionally, the terminal device sends a random access preamble and / or an uplink reference signal based on the random access parameters and / or reference signal parameters.

[0492] Optionally, when the source cell is configured with at least one conditional switching configuration and / or conditional LTM switching configuration, the terminal device may send a random access preamble and / or an uplink reference signal to at least one candidate cell and / or candidate LTM cell.

[0493] Optionally, the terminal device can evaluate candidate cells and / or candidate LTM cells based on the execution conditions. When at least one candidate cell and / or candidate LTM cell meets the execution conditions, the system information of the corresponding cell is obtained, and the system information includes random access parameters and / or reference signal parameters. The terminal device sends a random access preamble and / or uplink reference signal based on the random access parameters and / or reference signal parameters.

[0494] Optionally, after sending the random access preamble and / or uplink reference signal, the terminal device returns to the source cell to receive response information.

[0495] Optionally, satisfying the execution condition and / or the LTM execution condition includes: the signal strength satisfies a threshold value, and / or the signal strength satisfies the threshold value and is maintained for a period of time.

[0496] Optionally, the candidate cell and / or candidate LTM cell receives the uplink reference signal sent by the terminal device, calculates the corresponding TA value, and sends response information to the source cell through signaling.

[0497] Optionally, the candidate cell and / or the candidate LTM cell may further provide an uplink transmission delay to the source cell, and the source cell calculates the TA value of the candidate cell according to the transmission delay provided by the candidate cell.

[0498] Optionally, the candidate cell and / or candidate LTM cell may further provide uplink scheduling and / or configuration scheduling information and / or radio temporary identification to the source cell. Optionally, the signaling used may be any interactive signaling between base stations, including but not limited to: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, UE CONTEXT MODIFICATION REQUEST, UE CONTEXT MODIFICATION RESPONSE, which is not limited in the embodiments of the present application.

[0499] Optionally, the source cell carries the candidate cell and / or candidate LTM cell TA value in a random access response and sends it to the terminal device.

[0500] Optionally, if the terminal device sends a random access preamble and / or uplink reference signal to at least one candidate cell and / or candidate LTM cell during the process of sending a random access preamble and / or uplink reference signal, the random access response may carry a TA value of at least one candidate cell and / or candidate LTM cell.

[0501] Optionally, the network device sends at least one RAR carrying at least one candidate cell and / or candidate LTM cell TA value.

[0502] Optionally, the random access response may also carry at least one of uplink scheduling, configuration scheduling information, and radio temporary identification of the candidate cell and / or candidate LTM cell.

[0503] Optionally, after receiving the TA value of the candidate cell, the terminal device starts the corresponding time advance timer.

[0504] Optionally, the source cell may also carry at least one candidate LTM cell TA value through the LTM handover command.

[0505] Optionally, the LTM handover command may further carry at least one of uplink scheduling, configuration scheduling information, and radio temporary identification of the candidate LTM cell.

[0506] Optionally, the LTM switching command is carried through MAC layer signaling, such as MAC subheader and / or MAC CE.

[0507] Optionally, the terminal device evaluates the candidate cell execution conditions and / or LTM execution conditions. When at least one candidate cell meets the execution conditions or LTM execution conditions and the corresponding TAT is still running, the terminal device initiates random access-free conditional switching or LTM execution conditions based on the received candidate cell TA value or candidate LTM cell TA value.

[0508] Optionally, if the candidate cell has met the execution conditions and / or LTM execution conditions during the process of the terminal device sending the random access preamble and / or uplink reference signal, when the terminal device receives the candidate cell TA value or the candidate LTM cell TA value sent by the source cell, it immediately performs random access-free conditional switching or conditional LTM switching.

[0509] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters.

[0510] Optionally, when the execution conditional candidate cell or the conditional LTM candidate cell is satisfied and the corresponding TAT has timed out, random access conditional handover or conditional LTM handover is performed.

[0511] Optionally, the terminal device sends uplink data and / or RRC reconfiguration completion signaling to the target cell.

[0512] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, sends confirmation information and / or RRC reconfiguration completion confirmation, and completes the conditional switching or conditional LTM switching.

[0513] Optionally, the RRC reconfiguration completion confirmation can be an automatic repeat request confirmation and / or an automatic hybrid repeat request confirmation, for example: the terminal device sends RRC reconfiguration completion signaling, receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell, and the terminal device sends the first uplink data and receives ARQ ACK and / or HARQ-ACK feedback from the candidate cell.

[0514] Optionally, after receiving the candidate cell confirmation information, the terminal device completes the conditional handover or conditional LTM handover and uses the candidate cell as the serving cell.

[0515] Optionally, the terminal device still saves the conditional switching configuration and / or conditional LTM switching configuration after completing the conditional switching and / or conditional LTM switching.

[0516] This embodiment uses the above-mentioned scheme, specifically pre-configuring candidate cell information through the network device. The terminal device can perform uplink synchronization and / or obtain the target cell TA value in advance according to the pre-configured information, and perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling issuance and performing early uplink synchronization and / or reserved resource waste, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0517] Tenth embodiment

[0518] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the processing method in the foregoing embodiments.

[0519] Optionally, after the terminal device reports the measurement report, if it first receives the conditional switching configuration and / or conditional LTM switching configuration of at least one candidate cell sent by the source cell, it can first perform a conditional switching evaluation based on the execution conditions in the conditional switching configuration and / or conditional LTM switching configuration, and then send a random access preamble and / or uplink reference signal to at least one candidate cell that meets the execution conditions based on the evaluation result, and receive a response message in the source cell after sending the random access preamble and / or uplink reference signal. The candidate cell receives the random access preamble and / or uplink reference signal sent by the terminal device, and sends the corresponding TA value and / or uplink transmission delay to the source cell through signaling. The source cell can carry the TA value of the candidate cell and / or candidate LTM cell through the RAR and / or LTM switching command and send it to the terminal device, so that the terminal device initiates random access-free conditional switching and / or conditional LTM switching.

[0520] Optionally, after the terminal device reports the measurement report, if it first receives the conditional switching configuration and / or conditional LTM switching configuration of at least one candidate cell sent by the source cell, and then receives the DCI sent by the network device through the PDCCH (used to require the terminal device to perform random access and / or uplink reference signal transmission triggered by PDCCH-order), then after receiving the random access control information and / or uplink reference signal transmission request triggered by PDCCH-odrer, it can send a random access preamble according to the random access parameters and / or random access configuration, and / or send an uplink reference signal according to the reference signal parameters and / or random access configuration, and receive response information in the source cell after sending the random access preamble and / or uplink reference signal. The candidate cell receives the random access preamble and / or uplink reference signal sent by the terminal device, and sends the corresponding TA value and / or uplink transmission delay to the source cell through signaling. The source cell can send the TA value of the candidate cell and / or candidate LTM cell to the terminal device through the RAR and / or LTM switching command, so that the terminal device can further perform conditional switching evaluation, and then initiate random access-free conditional switching for the candidate cell that meets the execution conditions based on the evaluation results, and / or initiate random access-free conditional LTM switching for the candidate LTM cell that meets the execution conditions.

[0521] Optionally, after the terminal device reports the measurement report, if it first receives the DCI sent by the network device through the PDCCH (used to require the terminal device to perform random access and / or uplink reference signal transmission triggered by PDCCH-order), it can send a random access preamble according to the random access parameters and / or random access configuration after receiving the random access control information and / or uplink reference signal transmission request triggered by PDCCH-odrer, and / or send an uplink reference signal according to the reference signal parameters and / or random access configuration, and receive the response information in the source cell after sending the random access preamble and / or uplink reference signal. The candidate cell receives the random access preamble and / or uplink reference signal sent by the terminal device, and sends the corresponding TA value and / or uplink transmission delay to the source cell through signaling. The source cell can send the TA value of the candidate cell and / or candidate LTM cell to the terminal device through the RAR and / or LTM switching command, and send the conditional switching configuration and / or conditional LTM switching configuration of the corresponding candidate cell, so that the terminal device performs conditional switching evaluation according to the execution conditions in the conditional switching configuration and / or conditional LTM switching configuration, and then initiates random access-free conditional switching for the candidate cell that meets the execution conditions based on the evaluation results, and / or initiates random access-free conditional LTM switching for the candidate LTM cell that meets the execution conditions.

[0522] This embodiment uses the above-mentioned scheme, specifically through the terminal device flexibly determining the method of obtaining the TA value of the target cell according to the content and / or sequence of the configuration information and / or DCI sent by the network device, performing random access-free conditional switching and / or conditional LTM switching, eliminating measurement reporting and / or switching signaling issuance and performing early uplink synchronization and / or reserved resource waste, reducing signaling overhead and / or accelerating the switching process and / or reducing service interruption delay, and / or explicitly executing random access-free conditional switching and / or conditional LTM switching processes.

[0523] Eleventh embodiment

[0524] FIG15 is a schematic diagram of an interaction process according to an eleventh embodiment of the present invention. In this embodiment, a method for obtaining a target cell TA value through autonomous measurement by a terminal device is proposed.

[0525] In the existing protocol, the terminal device performs early uplink synchronization through the control of the network device. For example, the PDCCH order triggers the terminal device to send a random access preamble to the candidate cell, and obtains the candidate cell TA value through the serving cell, and / or activates the target cell TCI State through the MAC CE and performs TA value measurement under the instruction of the terminal to measure TA. However, in the conditional switching and / or conditional LTM switching scenarios, the terminal device cannot determine the timing of autonomously measuring the candidate cell TA value, and / or, in the continuous conditional switching and / or continuous conditional LTM switching scenarios, the terminal device cannot determine the timing of autonomously measuring the candidate cell TA value.

[0526] This embodiment introduces a method for obtaining the TA value of the target cell in advance in conditional handover and / or conditional LTM handover.

[0527] Optionally, the terminal device performs random access-free conditional switching and / or conditional LTM switching in response to satisfying the first condition.

[0528] Optionally, performing random access-free conditional switching and / or conditional LTM switching includes performing random access-free conditional switching and / or conditional LTM switching based on a measured TA value.

[0529] Optionally, the terminal device reports a measurement report, and optionally, the measurement report is a layer 3 measurement report.

[0530] Optionally, the source cell obtains the candidate cell configuration, including: candidate cell configuration parameters and / or compensation values.

[0531] Optionally, the compensation value is an uplink reception time difference (UL RX timing difference) and / or a downlink transmission time difference (DL TX timing difference).

[0532] Optionally, the compensation value is used to assist the terminal device in calculating the TA value of the candidate cell.

[0533] Optionally, the time difference can be the time difference on the network device side and / or the time difference on the terminal device side, for example: the time difference when the network device receives the uplink, the time difference when the network device sends the downlink, the time difference when the terminal device sends the uplink, and the time difference when the terminal device receives the downlink. This is not limited in this embodiment.

[0534] Optionally, the compensation value is a compensation value of a specific candidate cell, for example, each candidate cell has its own compensation value.

[0535] Optionally, the candidate cell is a candidate LTM cell.

[0536] Optionally, the candidate LTM cell configuration includes at least one of a terminal equipment measured TA value identifier (ueMeasuredTA-ID), an advance uplink synchronization configuration, a configuration scheduling configuration, a candidate cell complete configuration indication, a new terminal radio temporary identifier, a time advance timer, a candidate cell difference configuration, and a candidate cell reference configuration.

[0537] Optionally, the network further configures a serving cell terminal device to measure a TA value identifier;

[0538] Optionally, the layer 1 measurement configuration includes LTM channel state information resource configuration and / or LTM channel state information reporting configuration.

[0539] Optionally, the scheduling configuration is also associated with beam information.

[0540] Optionally, configuring the scheduling configuration includes configuring scheduling type 1 (CG Type 1).

[0541] Optionally, the LTM candidate cell configuration is associated with a corresponding index.

[0542] Optionally, the source cell sends a conditional handover configuration, including at least one of a conditional handover configuration index, a conditional execution condition, and a candidate cell configuration.

[0543] Optionally, the terminal device stores the received conditional handover configuration locally. Optionally, the conditional handover configuration is sent via RRC reconfiguration signaling.

[0544] Optionally, the source cell may send a conditional handover configuration of at least one candidate cell and distinguish the candidate cells by a conditional handover configuration index.

[0545] Optionally, the conditional switching may also be a conditional LTM switching.

[0546] Optionally, the conditional LTM handover configuration includes: at least one of a conditional LTM handover configuration index, an LTM execution condition, and a candidate LTM cell configuration parameter.

[0547] Optionally, the source cell may also send universal random access parameters for subsequent conditional LTM handover.

[0548] Optionally, the terminal device sends configuration confirmation information, and optionally, the configuration confirmation is sent via RRC reconfiguration completion signaling.

[0549] Optionally, the terminal device evaluates the candidate cells according to the execution conditions, and when at least one candidate cell meets the execution conditions, the terminal device is triggered to measure the measured TA value of the corresponding candidate cell.

[0550] Optionally, in response to the measurement condition being met, the terminal device initiates terminal device measurement of a TA value for at least one candidate cell.

[0551] Optionally, the measurement condition includes at least one candidate cell configuration terminal device measurement TA value identifier.

[0552] Optionally, the terminal device determines whether the corresponding candidate cell is configured with a terminal device measurement TA value identifier. If the terminal device measurement TA value identifier is configured, the terminal device can be triggered to measure the TA value; if the terminal device measurement TA value identifier is not configured, random access condition switching is performed or the TA value acquisition method in the aforementioned embodiment is executed, which is not repeated in this embodiment.

[0553] Optionally, the terminal device receives the TCI status of the candidate cell sent by the network device, activates the MAC CE, and determines whether the corresponding candidate cell is configured with the terminal device measurement TA value identifier. If the terminal device measurement TA value identifier is configured, the terminal device measurement TA value can be initiated for the candidate cell; if the terminal device measurement TA value identifier is not configured, the terminal device measurement TA value is not initiated for the candidate cell.

[0554] Optionally, the measurement condition further includes that the TA value identifier measured by the terminal equipment configured in at least one candidate cell is the same as the TA value identifier measured by the terminal equipment configured in the current serving cell.

[0555] Optionally, the terminal device determines whether the terminal device measurement TA value identifier configured in the corresponding candidate cell is the same as the terminal device measurement TA value identifier configured in the current service cell. If they are the same, the terminal device can be triggered to measure the TA value; if they are not the same, random access condition switching is executed or the TA value acquisition method in the aforementioned embodiment is executed, which is not repeated in this embodiment.

[0556] Optionally, the terminal device may evaluate candidate cells according to the LTM execution condition, and initiate the terminal device to measure the TA value of the corresponding candidate cell when at least one candidate cell meets the execution condition.

[0557] Optionally, at least one candidate cell meeting the execution condition includes: at least one candidate cell meeting the conditional execution condition and / or the LTM execution condition.

[0558] Optionally, the terminal device measures the TA value by measuring and / or calculating the TA value and / or compensation value of the serving cell. Optionally, the compensation value can be obtained through the candidate cell index.

[0559] Optionally, the serving cell TA value is carried by MAC CE. For details, reference may be made to the existing protocol TS 38.321, which will not be described in detail in this embodiment.

[0560] Optionally, satisfying the execution condition and / or the LTM execution condition includes: the signal limit satisfies a threshold value and / or the signal strength satisfies a threshold value and is maintained for a period of time.

[0561] Optionally, the terminal device initiates random access-free conditional switching or LTM conditional switching based on the measured TA value of the candidate cell and / or the TA value of the candidate LTM cell, and sends uplink data and / or RRC reconfiguration completion signaling to the candidate cell.

[0562] Optionally, the terminal device applies the measured TA value of the candidate cell and / or starts TAT.

[0563] Optionally, the terminal device confirms whether there is a measured candidate cell TA value, and if there is a measured candidate cell TA value, performs random access condition switching; and / or, if there is no measured candidate cell TA value, performs random access condition switching.

[0564] Optionally, the terminal device applies corresponding candidate cell configuration parameters or candidate LTM cell configuration parameters. Optionally, the configuration parameters are complete configurations.

[0565] Optionally, the complete configuration is formed by combining the reference configuration and / or the differential configuration.

[0566] Optionally, the target cell responds to the uplink data and / or RRC reconfiguration completion signaling sent by the terminal device, and sends new downlink data scheduling and / or new uplink data scheduling. After receiving the new scheduling of the candidate cell, the terminal device completes the conditional switching or conditional LTM switching and regards the candidate cell as the serving cell.

[0567] Optionally, the terminal device still saves the conditional handover configuration and / or the conditional LTM handover configuration after completing the conditional handover or the conditional LTM handover.

[0568] Optionally, after completing conditional handover or conditional LTM handover, the terminal device updates the TA value identifier measured by the terminal device of the serving cell, for example, the TA value identifier measured by the terminal device is updated to the TA value identifier measured by the terminal device of the candidate cell of the handover.

[0569] Through the technical solution of this embodiment, specifically through the terminal device autonomously measuring the TA value when the first condition is met, and based on the measured TA value, performing random access-free conditional switching and / or conditional LTM switching, the terminal device can perform uplink synchronization in advance and / or obtain the target cell TA value in advance, and perform random access-free conditional switching and / or conditional LTM switching, eliminating the need for measurement reporting and / or switching signaling, performing early uplink synchronization, reducing signaling overhead, and / or accelerating the switching process, and / or reducing service interruption delay, and / or clarifying the random access-free conditional switching and / or conditional LTM switching process.

[0570] Twelfth embodiment

[0571] 16 is a flow chart of a processing method according to a twelfth embodiment. The method according to the embodiment of the present application can be applied to a network device (such as a base station), and includes the following steps:

[0572] S1: Sending first content so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content.

[0573] Optionally, the first content includes at least one of downlink control information, conditional switching configuration of the candidate cell, conditional LTM switching configuration, serving cell TA value, terminal device measured TA value identifier and compensation value.

[0574] Optionally, the conditional handover configuration includes indication information that the TA value of the candidate cell is zero and / or indication information that the TA value of the candidate cell is the same as that of the serving cell.

[0575] Optionally, the conditional LTM handover configuration includes indication information that the TA value of the candidate LTM cell is zero and / or indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0576] Optionally, the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content, including:

[0577] The terminal device selects or determines a candidate cell that meets the second condition based on the first content;

[0578] The terminal device sends a random access preamble and / or a reference signal to a candidate cell that meets the second condition, and the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or, the terminal device measures and / or calculates the measured TA value of the candidate cell that meets the second condition, and performs random access-free conditional switching and / or conditional LTM switching based on the measured TA value.

[0579] Optionally, the second condition includes a conditional switching execution condition and / or a conditional LTM switching execution condition.

[0580] Optionally, the feedback information is carried in a random access response and / or an LTM handover command.

[0581] Optionally, the feedback information includes a candidate cell TA value and / or a candidate LTM cell TA value.

[0582] Optionally, the downlink control information includes at least one of index information, random access configuration, and reference signal configuration.

[0583] Optionally, the terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell.

[0584] Optionally, the measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0585] Optionally, the conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value.

[0586] Optionally, the conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value.

[0587] Optionally, the random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identity.

[0588] Optionally, the LTM handover command carries at least one of a TA value, uplink scheduling, configuration scheduling information, and a radio temporary identity of at least one candidate LTM cell.

[0589] Optionally, the index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index.

[0590] Optionally, in response to the measurement condition being met, the terminal device initiates terminal device measurement of a TA value for at least one candidate cell.

[0591] Optionally, the network device may obtain at least one of a candidate cell TA value, a compensation value, an uplink transmission delay, an uplink scheduling, configuration scheduling information, and a radio temporary identification provided by the candidate cell.

[0592] Optionally, the network device may calculate the TA value of the candidate cell according to the uplink transmission delay.

[0593] Optionally, the network device receives feedback information corresponding to the random access preamble and / or reference signal sent by the candidate cell, and / or sends feedback information corresponding to the random access preamble and / or reference signal to the terminal device.

[0594] This embodiment uses the above-mentioned scheme, specifically by sending the first content, so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content, providing a conditional switching and / or conditional LTM switching method that supports random access-free, and / or, clarifies the execution conditions of conditional LTM switching; and / or, introduces a method for conditional switching and / or conditional LTM switching to obtain the target cell TA value in advance; reduces the signaling overhead caused by the network device sending the switching signaling, and / or accelerates the switching process and / or reduces the service interruption delay.

[0595] Please refer to Figure 17, which is a schematic diagram of the structure of a processing device provided in an embodiment of the present application. The device can be installed in or is the terminal device in the above-mentioned method embodiment. The processing device shown in Figure 17 can be used to perform some or all of the functions in the method embodiment described in the above embodiment. As shown in Figure 17, the processing device 110 includes:

[0596] The processing module 111 is configured to perform random access-free conditional handover and / or conditional LTM handover in response to a first condition being met.

[0597] Optionally, the performing of random access-free conditional switching and / or conditional LTM switching includes:

[0598] Performing random access-free conditional handover and / or conditional LTM handover based on feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or,

[0599] Based on the measured TA value, random access-free conditional handover and / or conditional LTM handover are performed.

[0600] Optionally, the first condition is satisfied, including at least one of the following:

[0601] Determining that at least one candidate cell meets the conditional handover execution condition;

[0602] Determining that at least one candidate cell satisfies a conditional LTM handover execution condition;

[0603] Receiving downlink control information;

[0604] Receiving radio resource control reconfiguration signaling;

[0605] The conditional handover configuration carries indication information that the TA value of the candidate cell is zero and / or indication information that the TA value of the candidate cell is the same as that of the serving cell;

[0606] The conditional LTM handover configuration carries indication information that the TA value of the candidate LTM cell is zero and / or indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0607] Optionally, the device further comprises at least one of the following:

[0608] The feedback information is carried in the random access response and / or LTM handover command;

[0609] The feedback information includes the candidate cell TA value and / or the candidate LTM cell TA value;

[0610] The downlink control information includes at least one of index information, random access configuration, and reference signal configuration;

[0611] The radio resource control reconfiguration signaling includes at least one of the serving cell TA value, the conditional handover configuration of at least one candidate cell, the conditional LTM handover configuration, the terminal equipment measured TA value identifier, and the compensation value.

[0612] Optionally, the device further comprises at least one of the following:

[0613] The conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value;

[0614] The conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value;

[0615] The random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configured scheduling information, and a radio temporary identity;

[0616] The LTM handover command carries at least one of the TA value, uplink scheduling, configuration scheduling information, and radio temporary identification of at least one candidate LTM cell;

[0617] The index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index;

[0618] In response to the measurement condition being met, the terminal device initiates the terminal device to measure the TA value of at least one candidate cell.

[0619] Optionally, the device further comprises at least one of the following:

[0620] The system information of the corresponding candidate cell is obtained according to the candidate cell configuration parameters and / or the candidate LTM cell configuration parameters;

[0621] Performing random access-free access based on the candidate cell TA value and / or the candidate LTM cell TA value;

[0622] Perform conditional switch evaluation based on conditional switch configuration;

[0623] Perform conditional LTM switching evaluation based on the conditional LTM switching configuration;

[0624] Applying candidate cell configuration parameters and / or candidate LTM cell configuration parameters;

[0625] Save conditional switching configuration and / or conditional LTM switching configuration;

[0626] The measurement condition includes a TA value identifier of a terminal device measured in at least one candidate cell configuration, and / or the TA value identifier of a terminal device measured in at least one candidate cell configuration is the same as the TA value identifier of a terminal device measured in the current serving cell configuration;

[0627] The measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0628] The processing device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0629] Please refer to Figure 18, which is a second structural diagram of a processing device provided in an embodiment of the present application. The device can be installed in or be the network device in the above method embodiment. As shown in Figure 18, the processing device 120 includes:

[0630] The sending module 121 is configured to send the first content, so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content.

[0631] Optionally, the first content includes at least one of the following:

[0632] Downlink control information;

[0633] Conditional handover configuration of at least one candidate cell;

[0634] Conditional LTM handover configuration for at least one candidate cell;

[0635] TA value of serving cell;

[0636] Terminal equipment measurement TA value identification;

[0637] Compensation value.

[0638] Optionally, the device further comprises at least one of the following:

[0639] The conditional handover configuration includes indication information that the candidate cell TA value is zero;

[0640] The conditional handover configuration includes an indication that the candidate cell has the same TA value as the serving cell;

[0641] The conditional LTM handover configuration includes an indication that the TA value of the candidate LTM cell is zero;

[0642] The conditional LTM handover configuration includes indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

[0643] Optionally, the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content, including:

[0644] The terminal device selects or determines a candidate cell that meets the second condition based on the first content;

[0645] The terminal device sends a random access preamble and / or a reference signal to a candidate cell that meets the second condition, and the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or, the terminal device measures and / or calculates the measured TA value of the candidate cell that meets the second condition, and performs random access-free conditional switching and / or conditional LTM switching based on the measured TA value.

[0646] Optionally, the device further comprises at least one of the following:

[0647] The second condition includes a conditional switch execution condition and / or a conditional LTM switch execution condition;

[0648] The feedback information is carried in the random access response and / or LTM handover command;

[0649] The feedback information includes the candidate cell TA value and / or the candidate LTM cell TA value;

[0650] The downlink control information includes at least one of index information, random access configuration, and reference signal configuration;

[0651] The terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell;

[0652] The measured TA value is obtained by measuring and / or calculating the terminal device through the serving cell TA value and / or compensation value.

[0653] Optionally, the device further comprises at least one of the following:

[0654] The conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value;

[0655] The conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value;

[0656] The random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configured scheduling information, and a radio temporary identity;

[0657] The LTM handover command carries at least one of the TA value, uplink scheduling, configuration scheduling information, and radio temporary identification of at least one candidate LTM cell;

[0658] The index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index;

[0659] In response to the measurement condition being met, the terminal device initiates the terminal device to measure the TA value of at least one candidate cell.

[0660] Optionally, the device further comprises at least one of the following:

[0661] Obtaining at least one of a candidate cell TA value, a compensation value, an uplink transmission delay, an uplink scheduling, configuration scheduling information, and a radio temporary identification provided by the candidate cell;

[0662] Calculate the candidate cell TA value based on the uplink transmission delay;

[0663] receiving feedback information corresponding to a random access preamble and / or a reference signal sent by a candidate cell;

[0664] Send feedback information corresponding to the random access preamble and / or reference signal to the terminal device.

[0665] The processing device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0666] Refer to Figure 19, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 19, the communication device 140 described in this embodiment can be the terminal device (or component that can be used for a terminal device) or network device (or component that can be used for a network device) mentioned in the aforementioned method embodiment. The communication device 140 can be used to implement the methods corresponding to the terminal device or network device described in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment.

[0667] The communication device 140 may include one or more processors 141, also referred to as processing units, which may perform certain control or processing functions. Processor 141 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, while the central processing unit may be used to control the communication device, execute software programs, and process software program data.

[0668] Optionally, the processor 141 may also store instructions 143 or data (eg, intermediate data). Optionally, the instructions 143 may be executed by the processor 141, so that the communication device 140 executes the method corresponding to the terminal device or network device described in the above method embodiment.

[0669] Optionally, the communication device 140 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments.

[0670] Optionally, the communication device 140 may include one or more memories 142 , on which instructions 144 may be stored. The instructions may be executed on the processor 141 , so that the communication device 140 executes the method described in the above method embodiment.

[0671] Optionally, data may also be stored in the memory 142. The processor 141 and the memory 142 may be provided separately or integrated together.

[0672] Optionally, the communication device 140 may further include a transceiver 145 and / or an antenna 146. The processor 141 may be referred to as a processing unit, and controls the communication device 140 (terminal device, core network device, or wireless access network device). The transceiver 145 may be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, and is used to implement the transceiver functions of the communication device 140.

[0673] Optionally, if the communication device 140 is used to implement operations corresponding to the terminal device in the above embodiments, for example, the transceiver 145 can receive the first content; and the processor 141 can perform random access-free conditional switching and / or conditional LTM switching based on the first content.

[0674] Optionally, the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, and will not be repeated here.

[0675] Optionally, if the communication device 140 is used to implement operations corresponding to the network devices in the above embodiments, for example: the transceiver 145 can send the first content so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content.

[0676] Optionally, the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, and will not be repeated here.

[0677] The processor 141 and transceiver 145 described in this application may be implemented on an IC (Integrated Circuit), an analog integrated circuit, an RFIC (Radio Frequency Integrated Circuit), a mixed-signal integrated circuit, an ASIC (Application Specific Integrated Circuit), a PCB (Printed Circuit Board), an electronic device, etc. The processor 141 and transceiver 145 may also be manufactured using various integrated circuit process technologies, such as CMOS (Complementary Metal Oxide Semiconductor), NMOS (N Metal-Oxide-Semiconductor), PMOS (Positive Channel Metal Oxide Semiconductor), BJT (Bipolar Junction Transistor), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0678] In this application, a communication device may be a terminal device (such as a mobile phone) or a network device (such as a base station), and the specific definition needs to be determined based on the context. In addition, the terminal device can be implemented in various forms. For example, the terminal devices described in this application may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminal devices such as digital TVs and desktop computers.

[0679] Although the communication device is described above by taking a terminal device or a network device as an example, the scope of the communication device described in this application is not limited to the above-mentioned terminal device or network device, and the structure of the communication device may not be limited to Figure 19. The communication device may be an independent device or may be part of a larger device.

[0680] An embodiment of the present application also provides a communication system, including: a terminal device as in any of the above embodiments; and a network device as in any of the above embodiments.

[0681] An embodiment of the present application also provides a communication device, including a memory and a processor, wherein a processing program is stored in the memory, and when the processing program is executed by the processor, the steps of the processing method in any of the above embodiments are implemented.

[0682] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified based on the context.

[0683] An embodiment of the present application further provides a storage medium having a processing program stored thereon. When the processing program is executed by a processor, the steps of the processing method in any of the above embodiments are implemented.

[0684] In the embodiments of the communication device and storage medium provided in the embodiments of the present application, all technical features of any of the above-mentioned processing method embodiments may be included. The expanded and explained contents of the specification are basically the same as those of the embodiments of the above-mentioned methods and will not be repeated here.

[0685] An embodiment of the present application further provides a computer program product, which includes computer program code. When the computer program code runs on a computer, the computer executes the methods in the various possible implementation modes described above.

[0686] An embodiment of the present application also provides a chip, including a memory and a processor, wherein the memory is used to store computer programs, and the processor is used to call and run the computer programs from the memory, so that a device equipped with the chip executes the methods in the various possible implementation modes as described above.

[0687] It is understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems. The serial numbers of the above embodiments of this application are for descriptive purposes only and do not represent the advantages or disadvantages of the embodiments. The steps in the methods of the embodiments of this application can be adjusted in order, combined, and deleted according to actual needs. The units in the devices of the embodiments of this application can be combined, divided, and deleted according to actual needs. In this application, for the same or similar terms, concepts, technical solutions, and / or application scenario descriptions, they are generally only described in detail the first time they appear. When they appear again, they are generally not repeated for the sake of brevity. When understanding the technical solutions of this application, for the same or similar terms, concepts, technical solutions, and / or application scenario descriptions that are not described in detail later, reference can be made to the relevant detailed descriptions that precede them. In this application, the descriptions of each embodiment have their own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0688] The various technical features of the technical solution of this application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0689] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, controlled terminal device, or network device, etc.) to execute the method of each embodiment of the present application.

[0690] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a storage disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state storage disk Solid State Disk (SSD)).

[0691] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A processing method, wherein: Includes steps: S2: In response to satisfying the first condition, performing random access-free conditional switching and / or conditional LTM switching.

2. The method of claim 1, wherein: The performing of random access-free conditional switching and / or conditional LTM switching includes: Based on the feedback information corresponding to the random access preamble and / or the reference signal provided by the serving cell, performing random access-free conditional switching and / or conditional LTM switching; and / or, Based on the measured TA value, random access-free conditional handover and / or conditional LTM handover are performed.

3. The method of claim 1, wherein: The first condition is satisfied, including at least one of the following: Determining that at least one candidate cell satisfies a conditional handover execution condition; Determining that at least one candidate cell satisfies a conditional LTM handover execution condition; Receiving downlink control information; Receiving a radio resource control reconfiguration signaling; The conditional handover configuration carries indication information that the TA value of the candidate cell is zero and / or indication information that the TA value of the candidate cell is the same as that of the serving cell; The conditional LTM handover configuration carries indication information that the TA value of the candidate LTM cell is zero and / or indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

4. The method of claim 3, wherein: Also includes at least one of the following: The feedback information is carried in the random access response and / or the LTM switching command; The feedback information includes a candidate cell TA value and / or a candidate LTM cell TA value; The downlink control information includes at least one of index information, random access configuration, and reference signal configuration; The radio resource control reconfiguration signaling includes at least one of a serving cell TA value, a conditional switching configuration of at least one candidate cell, a conditional LTM switching configuration, a terminal equipment measured TA value identifier, and a compensation value.

5. The method of claim 4, wherein: Also includes at least one of the following: The conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value; The conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value; The random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identification; The LTM handover command carries at least one of the TA value, uplink scheduling, configuration scheduling information, and radio temporary identification of at least one candidate LTM cell; The index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index; In response to the measurement condition being met, initiating a terminal device to measure a TA value for at least one candidate cell.

6. The method of claim 5, wherein: Also includes at least one of the following: The system message of the corresponding candidate cell is obtained according to the candidate cell configuration parameters and / or the candidate LTM cell configuration parameters; Based on the candidate cell TA value and / or the candidate LTM cell TA value, performing random access-free; Perform conditional switch evaluation based on conditional switch configuration; Performing conditional LTM switching evaluation based on conditional LTM switching configuration; Applying candidate cell configuration parameters and / or candidate LTM cell configuration parameters; Save conditional switching configuration and / or conditional LTM switching configuration; The measurement condition includes a TA value identifier of a terminal device measured in at least one candidate cell configuration, and / or a TA value identifier of a terminal device measured in at least one candidate cell configuration is the same as a TA value identifier of a terminal device measured in a current serving cell configuration; The measured TA value is measured and / or calculated by the terminal device through the serving cell TA value and / or compensation value.

7. A processing method, wherein: Includes steps: S1: Send the first content so that the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content.

8. The method of claim 7, wherein: The first content includes at least one of the following: Downlink control information; a conditional handover configuration of at least one candidate cell; Conditional LTM handover configuration for at least one candidate cell; TA value of serving cell; Terminal equipment measurement TA value identification; Compensation value.

9. The method of claim 8, wherein: Also includes at least one of the following: The conditional handover configuration includes indication information that the TA value of the candidate cell is zero; The conditional handover configuration includes indication information that the TA value of the candidate cell is the same as that of the serving cell; The conditional LTM handover configuration includes an indication that the TA value of the candidate LTM cell is zero; The conditional LTM handover configuration includes indication information that the TA value of the candidate LTM cell is the same as that of the serving cell.

10. The method of claim 8, wherein: The terminal device performs random access-free conditional switching and / or conditional LTM switching based on the first content, including: The terminal device selects or determines a candidate cell that meets the second condition based on the first content; The terminal device sends a random access preamble and / or a reference signal to a candidate cell that meets the second condition, and the terminal device performs random access-free conditional switching and / or conditional LTM switching based on the feedback information corresponding to the random access preamble and / or reference signal provided by the serving cell; and / or the terminal device measures and / or calculates the measured TA value of the candidate cell that meets the second condition, and performs random access-free conditional switching and / or conditional LTM switching based on the measured TA value.

11. The method of claim 10, wherein: Also includes at least one of the following: The second condition includes a conditional switch execution condition and / or a conditional LTM switch execution condition; The feedback information is carried in the random access response and / or the LTM switching command; The feedback information includes a candidate cell TA value and / or a candidate LTM cell TA value; The downlink control information includes at least one of index information, random access configuration, and reference signal configuration; The terminal device measured TA value identifier is used to trigger the terminal device to measure and / or calculate the measured TA value of the corresponding candidate cell; The measured TA value is measured and / or calculated by the terminal device through the serving cell TA value and / or compensation value.

12. The method of claim 11, wherein: Also includes at least one of the following: The conditional handover configuration includes at least one of a conditional handover configuration index, an execution condition, a candidate cell configuration parameter, and a candidate cell TA value; The conditional LTM handover configuration includes at least one of a conditional LTM handover configuration index, an LTM execution condition, a candidate LTM cell configuration parameter, and a candidate LTM cell TA value; The random access response carries at least one of a TA value of at least one candidate cell and / or candidate LTM cell, uplink scheduling, configuration scheduling information, and a radio temporary identification; The LTM handover command carries at least one of the TA value, uplink scheduling, configuration scheduling information, and radio temporary identification of at least one candidate LTM cell; The index information includes a conditional switching configuration index and / or a conditional LTM switching configuration index; In response to the measurement condition being met, the terminal device initiates the terminal device to measure a TA value for at least one candidate cell.

13. The method of claim 12, wherein: Also includes at least one of the following: Obtaining at least one of a candidate cell TA value, a compensation value, an uplink transmission delay, an uplink scheduling, configuration scheduling information, and a radio temporary identification provided by the candidate cell; Calculate the candidate cell TA value based on the uplink transmission delay; receiving feedback information corresponding to a random access preamble and / or a reference signal sent by a candidate cell; Send feedback information corresponding to the random access preamble and / or reference signal to the terminal device.

14. A communication device, wherein: include: A memory, a processor, and a processing program stored in the memory and executable on the processor, wherein the processing program implements the steps of the processing method according to claim 1 or 7 when executed by the processor.

15. A storage medium, wherein: The storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the processing method according to claim 1 or 7 are implemented.

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