Processing method, communication device, and storage medium

Abstract

The application provides a processing method, a communication device and a storage medium. The processing method comprises: reserving and / or maintaining time advance information according to a first strategy. Through the technical scheme, the processing mechanism of the time advance information can be improved, so that the cell switching delay is reduced and / or the service interruption time is shortened.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a processing method, communication device and storage medium. Background Technology

[0002] Timing Advance (TA) is a key technology for uplink synchronization in cellular communication systems. By obtaining the timing advance information of candidate cells in advance, cell handover can be completed faster and the interruption delay of cell handover can be reduced.

[0003] In conceiving and implementing this application, the inventors discovered at least the following problems: In the existing protocol, the processing mechanism for advance time information obtained in advance during conditional LTM (L1 / L2 Triggered Mobility) handover is not perfect, which may be detrimental to reducing cell handover latency and / or reducing service interruption duration. Therefore, it is necessary to improve the processing mechanism for advance time information.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] The main objective of this application is to provide a processing method, communication device, and storage medium, which aims to improve the processing mechanism of advance time information, thereby supporting the reduction of cell handover latency and / or the reduction of service interruption duration.

[0006] This application provides a processing method applicable to terminal devices (such as mobile phones), comprising the following steps:

[0007] S2: Retain and / or maintain advance information based on the first strategy.

[0008] Optionally, step S2 includes at least one of the following:

[0009] Based on conditional LTM cell handover requests and / or first candidate cell identifier retention and / or maintenance time advance information;

[0010] Retain and / or maintain time advance information based on time advance indication information;

[0011] Based on the terminal device's autonomous retention and / or advance maintenance time information retention and / or advance maintenance time information.

[0012] Optionally, the conditional LTM cell handover request and / or the first candidate cell identifier are sent from the radio resource control layer to the media access control layer.

[0013] Optionally, the time advance indication information is carried in the LTM candidate time advance command MAC CE.

[0014] Optionally, the method further includes at least one of the following:

[0015] According to the LTM candidate time advance command MAC CE, start the time advance timer of at least one candidate cell;

[0016] In the event of performing a media access control reset and / or a conditional LTM cell handover, retain and / or maintain advance maintenance time information;

[0017] Send a reservation time advance indication and / or a second candidate cell identifier to the network device.

[0018] Optionally, retain and / or maintain advance maintenance time information, including at least one of the following:

[0019] Maintain the advance timer of at least one candidate cell in operation;

[0020] The advance timer for at least one candidate cell has not expired;

[0021] Retain and / or maintain the time advance value of at least one candidate cell.

[0022] Optionally, at least one candidate cell's advance timer carries conditional LTM configuration information.

[0023] Optionally, the advance retention time indication and / or the second candidate cell identifier are generated or determined based on the terminal device's autonomous retention and / or advance maintenance time information.

[0024] This application also provides a processing method applicable to network devices (such as base stations), comprising the following steps:

[0025] S1: Send conditional LTM configuration information to enable the terminal device to retain and / or maintain time advance information according to the first policy.

[0026] Optionally, the terminal device retains and / or maintains advance maintenance time information according to the first strategy, including at least one of the following:

[0027] The terminal device is based on the conditional LTM cell handover request and / or the first candidate cell identifier retention and / or maintenance time advance information;

[0028] The terminal device retains and / or maintains advance maintenance time information based on advance time indication information;

[0029] The terminal device retains and / or maintains advance maintenance time information based on its own autonomous retention of such information.

[0030] Optionally, the method further includes at least one of the following:

[0031] Conditional LTM configuration information carries a time advance timer for at least one candidate cell;

[0032] Conditional LTM cell handover request and / or first candidate cell identifier are sent by the terminal device from the radio resource control layer to the media access control layer;

[0033] The time advance indication information is carried in the LTM candidate time advance command MAC CE;

[0034] The terminal equipment retains and / or maintains advance maintenance time information when performing media access control reset and / or conditionally LTM cell handover.

[0035] The terminal device starts a time advance timer for at least one candidate cell based on the LTM candidate time advance command MAC CE.

[0036] Receive advance reservation time indication and / or second candidate cell identifier.

[0037] Optionally, the terminal device retains and / or maintains advance information, including at least one of the following:

[0038] The terminal device maintains a time advance timer for at least one candidate cell.

[0039] The advance timer for the terminal device to identify at least one candidate cell has not expired;

[0040] The terminal equipment retains and / or maintains the time advance value of at least one candidate cell.

[0041] This application also provides a communication device, including: a memory, a processor, and a processing program stored in the memory and executable on the processor, wherein the processing program, when executed by the processor, implements the steps of any of the processing methods described above.

[0042] The communication equipment mentioned in this application may be a terminal device (such as a mobile phone), a network device (such as a base station), or a chip (such as a SOC or a baseband chip with communication functions). The specific meaning needs to be clarified according to the context.

[0043] This application also provides a computer-readable storage medium storing a processing program, which, when executed by a processor, implements the steps of any of the processing methods described above.

[0044] The technical solution of this application, based on the first strategy of retaining and / or maintaining advance time information, can improve the processing mechanism of advance time information, thereby supporting the reduction of cell handover latency and / or supporting the reduction of service interruption duration. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0046] Figure 1 A schematic diagram of the hardware structure of a mobile terminal to implement the various embodiments of this application;

[0047] Figure 2 A communication network system architecture diagram provided for an embodiment of this application;

[0048] Figure 3 A schematic diagram of the hardware structure of a controller 140 provided in this application;

[0049] Figure 4 A schematic diagram of the hardware structure of a network node 150 provided in this application;

[0050] Figure 5 This is a flowchart illustrating the processing method according to the first embodiment;

[0051] Figure 6 This is a schematic diagram of the interaction timing according to the second embodiment;

[0052] Figure 7 This is a schematic diagram of the processing flow according to the fifth embodiment;

[0053] Figure 8 This is a flowchart illustrating the processing method according to the sixth embodiment;

[0054] Figure 9 Schematic diagram of the processing apparatus provided in the embodiments of this application Figure 1 ;

[0055] Figure 10 Schematic diagram of the processing apparatus provided in the embodiments of this application Figure 2 ;

[0056] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application.

[0057] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0058] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0059] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element, and / or, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0060] 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 only to distinguish information of the same type from one another. For example, without departing from the scope of this document, 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 word "if," as used herein, may be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of the stated feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used in this application, may be interpreted as inclusive, or mean any one or any combination thereof. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Similarly, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0061] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0062] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0063] It should be noted that step designations such as S1 and S2 are used in this document for the purpose of more clearly and concisely describing the corresponding content, and do not constitute a substantial limitation on the order. In specific implementation, those skilled in the art may execute S2 first and then S1, etc., but these should all be within the protection scope of this application.

[0064] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0065] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0066] The communication equipment mentioned in this application may be a terminal device (such as a mobile phone), a network device (such as a base station), or a chip (such as a SOC or a baseband chip with communication functions). The specific meaning needs to be clarified according to the context.

[0067] Terminal devices can be implemented in various forms. For example, the terminal devices described in this application may include smart terminal devices such as mobile phones, tablets, laptops, handheld computers, personal digital assistants (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.

[0068] The following description will use a mobile terminal as an example. Those skilled in the art will understand that, apart from elements specifically designed for mobile purposes, the construction according to the embodiments of this application can also be applied to fixed-type terminal devices.

[0069] Please see Figure 1 This is a schematic diagram of the hardware structure of a mobile terminal implementing various embodiments of this application. The mobile terminal 100 may include: 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, etc. Those skilled in the art will understand that... Figure 1 The mobile terminal structure shown does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0070] The following is combined Figure 1 A detailed introduction to each component of the mobile terminal:

[0071] The radio frequency unit 101 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with the processor 110; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc. And / or, the radio frequency unit 101 can also communicate wirelessly with networks and other devices. The aforementioned wireless communications may 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.

[0072] WiFi is a short-range wireless transmission technology. Mobile terminals, through the WiFi module 102, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 1 WiFi module 102 is shown, but it is understood that it is not a necessary component of a mobile terminal and can be omitted as needed without changing the nature of the invention.

[0073] The audio output unit 103 can convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into audio signals and output them as sound when the mobile terminal 100 is in call signal receiving mode, call mode, recording mode, voice recognition mode, broadcast receiving mode, etc. Furthermore, the audio output unit 103 can also provide audio output related to specific functions performed by the mobile terminal 100 (e.g., call signal receiving sound, message receiving sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0074] 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 acquired by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on the display unit 106. The image frames processed by the GPU 1041 can be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) in operating modes such as telephone call mode, recording mode, and voice recognition mode, and can process such sound into audio data. The processed audio (voice) data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 101 in telephone call mode. The microphone 1042 can 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.

[0075] 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 ambient light level, and the proximity sensor can turn off the display panel 1061 and / or backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0076] 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.

[0077] User input unit 107 can be used to receive input numerical or character information, and generate key signal inputs related to user settings and function control of the mobile terminal. Optionally, user input unit 107 may include touch panel 1071 and other input devices 1072. Touch panel 1071, also known as touch screen, can collect touch operations on or near the user (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 1071), and drive corresponding connection devices according to a pre-set program. Touch panel 1071 may include two parts: touch detection device and touch controller. Optionally, touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to touch controller; touch controller receives touch information from touch detection device, converts it into touch point coordinates, sends it to processor 110, and can receive and execute commands from processor 110. And / or, 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 also include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of the following: physical keyboard, function keys (such as volume control buttons, power buttons, etc.), trackball, mouse, joystick, etc., without being specifically limited here.

[0078] Optionally, the touch panel 1071 may cover 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. Subsequently, the processor 110 provides corresponding visual output on the display panel 1061 based on the type of touch event. Although in Figure 1 In this embodiment, the touch panel 1071 and the display panel 1061 are two independent components to realize the input and output functions of the mobile terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the mobile terminal. The specific implementation is not limited here.

[0079] Interface unit 108 serves as an interface through which at least one external device can connect to 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, and so on. Interface unit 108 may be used to receive input (e.g., data, power, etc.) from the external device and transmit the received input to one or more elements within mobile terminal 100, or it may be used to transmit data between mobile terminal 100 and the external device.

[0080] The memory 109 can be used to store software programs and various data. The memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). And / or, the memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0081] The processor 110 is the control center of the mobile terminal. It connects various parts of the mobile terminal via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109, and by calling data stored in the memory 109, it performs various functions and processes data of the mobile terminal, thereby providing overall monitoring of the mobile terminal. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 110.

[0082] The mobile terminal 100 may also include a power supply 111 (such as a battery) that supplies power to various components. Preferably, the power supply 111 can be logically connected to the processor 110 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0083] although Figure 1 As not shown, the mobile terminal 100 may also include a Bluetooth module, etc., which will not be described in detail here.

[0084] To facilitate understanding of the embodiments of this application, the communication network system on which the mobile terminal of this application is based is described below.

[0085] Please see Figure 2 , Figure 2 This application provides a communication network system architecture diagram. The communication network system is a New Radio (NR) system based on general mobile communication technology. The NR system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and the operator's IP services 204, which are connected in sequence.

[0086] Optionally, UE201 can be the aforementioned terminal device 100, which will not be described in detail here.

[0087] E-UTRAN202 includes eNodeB2021 and other eNodeB2022, etc. Optionally, eNodeB2021 can connect to other eNodeB2022 via backhaul (e.g., X2 interface), and eNodeB2021 connects to EPC203, providing access from UE201 to EPC203.

[0088] EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving Gateway) 2034, a PGW (Packet Data Network Gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, etc. Optionally, MME2031 is the control node that handles signaling between UE201 and EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as the Home Location Register (not shown in the figure) and stores user-specific information such as service characteristics and data rates. All user data can be sent through SGW2034. PGW2035 can provide UE 201 IP address allocation and other functions. PCRF2036 is the policy and charging control decision point for service data flow and IP bearer resources. It selects and provides available policy and charging control decisions for the policy and charging enforcement function unit (not shown in the figure).

[0089] IP services 204 may include the Internet, intranet, IMS (IP Multimedia Subsystem), or other IP services.

[0090] Although the above description uses 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 also to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., without limitation.

[0091] Figure 3 This 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 principle and beneficial effects are similar, and will not be described again here.

[0092] 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.

[0093] Figure 4 This application provides a schematic diagram of the hardware structure of a network node 150. The network node 150 includes a memory 1501 and a processor 1502. The memory 1501 is used to store program instructions, and the processor 1502 is used to call the program instructions in the memory 1501 to execute the steps performed by the first node in the first embodiment of the above method. The implementation principle and beneficial effects are similar, and will not be described again here.

[0094] 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.

[0095] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0096] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. 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. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) 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 integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk, SSD), etc.

[0097] Based on the above-described mobile terminal hardware structure and communication network system, various embodiments of this application are proposed.

[0098] Technical terms used in the embodiments of this application:

[0099] BM: Beam Management;

[0100] CG: Configured Grant;

[0101] CLTM: Conditional L1 / L2 Triggered Mobility;

[0102] HARQ-ACK: Hybrid Automatic Repeat reQuest-ACK knowledgement;

[0103] L1: Layer 1;

[0104] L2: Layer 2;

[0105] LTM: L1 / L2 Triggered Mobility;

[0106] MAC CE: Media Access Control Element;

[0107] MR: Measurement Report;

[0108] PDCCH: Physical Downlink Control Channel;

[0109] PUCCH: Physical Uplink Control Channel;

[0110] PUSCH: Physical Downlink Shared Channel;

[0111] RRC: Radio Resource Control;

[0112] RACH-Less: No random access required;

[0113] RACH-Base: Based on random access;

[0114] TA: Timing Advance;

[0115] TAT: Timing Advance Timer;

[0116] TCI: Transmission Configuration Indicator.

[0117] First Embodiment

[0118] Reference Figure 5 , Figure 5 The flowchart illustrating the processing method according to the first embodiment is shown below. The processing method of this application embodiment can be applied to a terminal device (such as a mobile phone) and includes the following steps:

[0119] S2: Retain and / or maintain advance information based on the first strategy.

[0120] Optionally, during the conditional LTM cell handover process, there is still a lack of a clear mechanism for processing the advance time information of candidate cells. If the advance synchronization process is re-executed after the conditional LTM cell handover is completed, it is easy to cause signaling overhead. And / or, in subsequent conditional LTM handovers, due to the lack of advance time information of candidate cells, it is necessary to perform conditional LTM cell handover based on random access, which is easy to cause cell handover delay and / or prolong the service interruption duration. In this application embodiment, a solution is proposed to retain and / or maintain advance time information according to the first strategy.

[0121] Optionally, based on conditional LTM cell handover requests and / or first candidate cell identifier retention and / or maintenance time advance information.

[0122] Optionally, the conditional LTM cell handover request and / or the first candidate cell identifier are sent from the radio resource control layer to the media access control layer.

[0123] Optionally, the time advance information may be retained and / or maintained based on the time advance indication information.

[0124] Optionally, the time advance indication information is carried in the LTM candidate time advance command MAC CE.

[0125] Optionally, the terminal device may independently retain and / or advance maintenance time information.

[0126] Optionally, the terminal device starts a time advance timer for at least one candidate cell based on the LTM candidate time advance command MAC CE.

[0127] Optionally, at least one candidate cell's advance timer carries conditional LTM configuration information.

[0128] Optionally, the terminal device may retain and / or maintain advance maintenance time information when performing a media access control reset and / or conditional LTM cell handover.

[0129] Optionally, the terminal device sends a reservation time advance indication and / or a second candidate cell identifier to the network device.

[0130] Optionally, the advance retention time indication and / or the second candidate cell identifier are generated or determined based on the terminal device's autonomous retention and / or advance maintenance time information.

[0131] Optionally, the advance retention time indication and / or the second candidate cell identifier are used to enable the network device to know the candidate cells for the terminal device to perform advance retention and / or maintenance information.

[0132] Optionally, retaining and / or maintaining advance information includes at least one of the following: keeping the advance timer of at least one candidate cell running, treating the advance timer of at least one candidate cell as not having expired, and retaining and / or maintaining the advance value of at least one candidate cell.

[0133] The technical solution of this embodiment, specifically by retaining and / or maintaining advance time information according to the first strategy, can improve the processing mechanism of advance time information. For example, it clarifies the processing method of advance time information during the LTM cell handover process, thereby supporting the reduction of signaling overhead, and / or supporting the reduction of cell handover latency, and / or supporting the reduction of service interruption duration.

[0134] Second Embodiment

[0135] Reference Figure 6 , Figure 6 This is a schematic diagram of the interaction timing according to the second embodiment, as shown below. Figure 6 As shown, based on the first embodiment described above, the processing method further includes: the terminal device reporting a measurement report to the network device, and the network device sending a radio resource control reconfiguration signaling message containing conditional LTM configuration information to the terminal device.

[0136] Optionally, the terminal device reports the measurement report to the network device (e.g., the source cell).

[0137] Optionally, the measurement report is a Layer 3 Measurement Report (MR).

[0138] Optionally, the source cell obtains the conditional LTM candidate cell configuration, including conditional LTM configuration information and / or conditional LTM execution conditions.

[0139] Optionally, the conditional LTM candidate cells are cells with the same central unit (Intra-CU).

[0140] Optionally, the source cell generates conditional LTM configuration information, including at least one of the following: conditional LTM configuration identifier, candidate cell conditional LTM configuration, and candidate cell conditional LTM execution conditions.

[0141] Optionally, the candidate cell condition LTM execution conditions include a layer 1 measurement configuration and / or at least one layer 3 measurement configuration.

[0142] Optionally, the LTM measurement event is a Layer 1 (L1) measurement event.

[0143] Optionally, the layer-one measurement event includes at least one of the following:

[0144] Event LTM2: The serving cell beam becomes worse than the absolute threshold;

[0145] Event LTM3: The beam of the candidate cell becomes more offset than the beam of the serving cell after compensation.

[0146] Event LTM4: The beam of candidate cell becomes better than the absolute threshold;

[0147] Event LTM5: The serving cell beam becomes worse than absolute threshold1 and the candidate cell beam becomes better than another absolute threshold2.

[0148] Conditional measurement event A3: Neighbour becomes offset better than SpCell after compensation;

[0149] Conditional measurement event A5: The serving cell beam is below the first threshold and the candidate cell beam is above the second threshold (SpCell becomes worse than threshold1 and neighbour becomes better than threshold2).

[0150] Optionally, conditional measurement event A3 (CondEventA3) and / or conditional measurement event A5 (CondEventA5) can be referenced to protocol TS 38.331 Release 18, 5.5.4.

[0151] Optionally, a layer-one measurement event can be a beam management measurement event.

[0152] Optionally, a layer-one measurement event can be a layer-one-two mobility measurement event.

[0153] Optionally, the candidate cell conditional LTM configuration includes at least one of the following: LTM candidate identifier, LTM candidate configuration, conditional LTM candidate configuration, early uplink synchronization configuration, no identity reset, serving cell no identity reset, and attempt LTM-Switch. For details, please refer to the protocol TS 38.300 Release 18, 6.3.2 LTM configuration.

[0154] Optionally, the candidate cell conditional LTM configuration includes the serving cell LTM configuration and / or the candidate cell LTM configuration.

[0155] Optionally, the candidate cell conditional LTM configuration includes at least one of the following: conditional LTM candidate identifier, conditional LTM execution condition identifier, layer-1 measurement event identifier, and LTM candidate time advance timer (ltm-Candidate-TimeAlignmentTimer).

[0156] Optionally, the LTM candidate time advance timer is used to maintain the time advance information of LTM candidate cells.

[0157] Optionally, the LTM candidate cell time advance information can be obtained through advance uplink synchronization.

[0158] Optionally, the network device (e.g., the source cell) sends a radio resource control reconfiguration signaling to the terminal device.

[0159] Optionally, the Radio Resource Control reconfiguration signaling carries conditional LTM configuration.

[0160] Optionally, the terminal device stores LTM configuration conditions and / or sets LTM execution conditions.

[0161] Optionally, the terminal device sends a radio resource control reconfiguration completion signal to the network device.

[0162] Optionally, the Radio Resource Control (RRC) reconfiguration completion signaling is used in response to a RRC reconfiguration signaling sent by a network device.

[0163] Optionally, the terminal device evaluates candidate cells based on conditional LTM configuration.

[0164] Optionally, the terminal device evaluates whether there are any candidate cells that meet the execution conditions based on the candidate cell conditions LTM execution conditions.

[0165] Optionally, the terminal device performs early downlink synchronization and / or early uplink synchronization.

[0166] Optionally, the terminal reports a Layer 1 measurement report.

[0167] Optionally, when at least one candidate cell satisfies a Layer 1 measurement event and / or an LTM measurement event, the terminal device reports a Layer 1 measurement report.

[0168] Optionally, when at least one candidate cell satisfies a Layer 3 measurement event and / or a conditional Layer 3 measurement event, the terminal device reports a Layer 3 measurement report.

[0169] Optionally, the Layer 1 measurement report is sent via MAC CE, for example, an event-triggered Layer 1 measurement report MAC CE, etc. This application embodiment does not specifically limit this.

[0170] Optionally, the MAC CE sends a Layer 1 measurement report carrying at least one candidate cell measurement result and / or candidate cell identifier. Optionally, the candidate cell identifier may refer to protocol TS 38.300 Release 18, 6.3.2, for example: LTM candidate identifier (LTM-CandidateId).

[0171] Optionally, the Layer 1 measurement report carries at least one candidate cell Layer 1 measurement result.

[0172] Optionally, the Layer 1 measurement report may also include physical uplink control channel and / or physical uplink shared channel reporting.

[0173] Optionally, layer one measurement includes at least one of periodic measurement, aperiodic measurement, and semi-persistent measurement, as detailed in TS 38.214 Release 18, 5.2.1.4.

[0174] Optionally, the Layer 1 measurement report includes at least one of periodic reports, non-periodic reports, and semi-static measurement reports, as detailed in TS 38.214 Release 18, 5.2.1.4.

[0175] Optionally, network devices and / or serving cells may trigger early downlink synchronization.

[0176] Optionally, the network device determines the candidate cells for early downlink synchronization by activating / deactivating the MAC CE based on the candidate cell TCI status.

[0177] Optionally, the network device responds to the measurement report reported by the terminal device that meets the condition LTM execution condition, and performs early uplink synchronization and / or early downlink synchronization.

[0178] Optionally, the measurement report includes a Layer 1 measurement report and / or a Layer 3 measurement report.

[0179] Optionally, network devices and / or serving cells may trigger early downlink synchronization in accordance with the following protocols: TS38.321 Release 18, 5.18.36, 6.1.3.76.

[0180] Optionally, network devices and / or serving cells may trigger early uplink synchronization.

[0181] Optionally, network devices and / or serving cells can trigger early uplink synchronization with candidate cells via PDCCH order.

[0182] Optionally, the terminal device sends a random access preamble to the candidate cell based on the received PDCCH order.

[0183] Optionally, the terminal device may perform early uplink synchronization with the candidate cell using the following protocols: TS 38.321 Release 18, 5.1 and / or TS 38.213 Release 18, 8, 21.

[0184] Optionally, the network device (e.g., the source cell) sends LTM candidate cell time advance information to the terminal device, and / or the terminal device starts the LTM candidate time advance timer.

[0185] Optionally, the LTM candidate cell time advance information is used for conditional LTM cell handover or conditional LTM cell handover without random access.

[0186] Optionally, the LTM candidate cell timing advance information is carried through MAC CE, such as LTM Candidate Timing Advance Command MAC CE, etc. This application embodiment does not specifically limit this.

[0187] Optionally, the LTM candidate time advance command MAC CE carries the LTM candidate cell time advance information and / or LTM candidate identifier of the candidate cell.

[0188] Optionally, the time advance information for LTM candidate cells is either a time advance value or an absolute time advance value.

[0189] Optionally, the LTM candidate time advance command MAC CE carries at least one candidate cell's LTM candidate cell time advance information and / or LTM candidate identifier.

[0190] Optionally, the LTM candidate time advance command MAC CE received by the terminal device starts the LTM candidate time advance timer.

[0191] Optionally, the terminal device receives at least one LTM candidate time advance command MAC CE and starts at least one LTM candidate time advance timer.

[0192] Optionally, the terminal device starts at least one LTM candidate time advance timer based on the received LTM candidate time advance command MAC CE.

[0193] Optionally, the terminal device starts the corresponding candidate cell LTM candidate time advance timer based on the LTM candidate identifier and / or time advance value.

[0194] Optionally, the LTM candidate time advance timer of at least one candidate cell is used to maintain and / or determine whether the time advance information of at least one candidate cell is still valid.

[0195] Optionally, the validity of the time advance value can be determined by whether the corresponding LTM candidate time advance timer is running through the LTM candidate identifier. For example, if the LTM candidate time advance timer is running, it means that the time advance value is valid; and / or, if the LTM candidate time advance timer is not running and / or has timed out, it means that the time advance value is invalid and / or invalid.

[0196] The technical solution of this embodiment specifically involves the terminal device reporting a measurement report to the network device, the network device sending a radio resource control reconfiguration signaling message containing conditional LTM configuration information to the terminal device, and the terminal device starting at least one LTM candidate time advance timer based on the received LTM candidate time advance command MAC CE. The time advance information of the corresponding candidate cell is then processed through the LTM candidate cell time advance timer, thereby improving the time advance information processing mechanism.

[0197] Third Embodiment

[0198] Based on any of the foregoing embodiments of this application, this embodiment further discloses a scheme for the terminal device to retain and / or maintain advance information according to a first strategy.

[0199] Optionally, the terminal device retains and / or maintains advance maintenance time information based on advance time indication information.

[0200] Optionally, time advance indication information is carried via MAC CE, such as: LTM candidate time advance command (LTMCandidate Timing Advance Command) MAC CE, etc.

[0201] Optionally, the time advance indication information is used to indicate the release or retention of LTM candidate cell time advance information. For example, when the indication information is "1", it indicates that the time advance information is retained and / or maintained; when the indication information is "0", it indicates that the time advance information is released and / or cleared; or, when the indication information is "0", it indicates that the time advance information is retained and / or maintained, and when the indication information is "1", it indicates that the time advance information is released and / or cleared.

[0202] Optionally, the time advance indication information is represented by a single bit.

[0203] Optionally, the time advance indication information corresponds to the LTM candidate cell time advance information of different candidate cells. For example, the LTM candidate cell time advance information of one candidate cell corresponds to one time advance indication information, and / or, the LTM candidate cell time advance information of at least one candidate cell corresponds to one time advance indication information.

[0204] Optionally, the terminal device is detached from the source cell and the target cell configuration is applied.

[0205] Optionally, when at least one candidate cell meets the candidate cell condition LTM execution condition, the execution is separated and synchronized with the target cell execution.

[0206] Optionally, when at least one candidate cell meets the candidate cell conditional LTM execution conditions, conditional LTM cell handover is triggered.

[0207] Optionally, at least one candidate cell meets the candidate cell condition LTM execution condition, including: meeting a Layer 1 measurement event and / or meeting a Layer 3 measurement event.

[0208] Optionally, the terminal device starts timer T304.

[0209] Optionally, timer T304 can be used to determine whether radio resource control reconstruction should be initiated and / or to determine whether conditional LTM cell switchover has been completed.

[0210] Optionally, when performing a media access control reset and / or conditional LTM cell handover, the terminal device retains and / or maintains advance maintenance time information according to the first strategy.

[0211] Optionally, the terminal device performing the conditional LTM handover process includes at least one of the following:

[0212] Perform a MAC reset.

[0213] The RRC request is made to the underlying system to perform a MAC reset.

[0214] The RRC layer requests the underlying execution condition LTM switch;

[0215] The RRC layer requests the underlying layer to perform conditional LTM handover and carries the candidate cell identifier;

[0216] The MAC layer receives the upper layer's execution condition LTM switching request;

[0217] The MAC layer receives the upper layer's conditional LTM handover request and candidate cell identifier.

[0218] Optionally, the candidate cell identifier includes the first candidate cell identifier.

[0219] Optionally, the terminal device, based on the conditional LTM cell handover request and / or the first candidate cell identifier reservation and / or maintenance time advance information, includes at least one of the following:

[0220] Based on the conditional LTM cell handover request and / or the first candidate cell identifier, the advance timer for maintaining at least one candidate cell runs;

[0221] The advance timer for treating at least one candidate cell as a conditional LTM cell handover request and / or the first candidate cell identifier has not expired;

[0222] Based on conditional LTM cell handover requests and / or the first candidate cell identifier, retain and / or maintain the timing advance value of at least one candidate cell.

[0223] Optionally, maintaining the timing advance timer of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier includes: applying the corresponding candidate cell timing advance value according to the first candidate cell identifier, and maintaining the timing advance timers of other non-first candidate cell identifiers in continuous operation.

[0224] Optionally, maintaining the time advance timer of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier as if the time advance timer of other non-first candidate cell identifiers has not expired includes: applying the corresponding candidate cell time advance value according to the first candidate cell identifier, and treating the time advance timer of other non-first candidate cell identifiers as if the time advance timer of other non-first candidate cell identifiers has not expired.

[0225] Optionally, retaining and / or maintaining the timing advance value of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier includes: applying the corresponding candidate cell timing advance value according to the first candidate cell identifier, and retaining and / or maintaining the timing advance values ​​of other non-first candidate cell identifiers.

[0226] Optionally, the terminal device retains and / or maintains the maintenance time advance information based on the time advance indication information, including at least one of the following:

[0227] Maintain the time advance timer of at least one candidate cell based on the time advance indication information;

[0228] Based on the advance time indication information, it is considered that the advance timer of at least one candidate cell has not expired;

[0229] Based on the time advance indication information, retain and / or maintain the time advance value of at least one candidate cell.

[0230] Optionally, maintaining the time advance timer of at least one candidate cell based on the time advance indication information includes: applying the candidate cell time advance value and maintaining the time advance timer continuously running according to the corresponding time advance indication information, and / or, other candidate cells maintaining the time advance timer continuously running according to the corresponding time advance indication information.

[0231] Optionally, considering the time advance indication information as indicating that the time advance timer of at least one candidate cell has not expired includes: applying the time advance value of the candidate cell and maintaining the time advance timer in accordance with the corresponding time advance indication information, and / or, other candidate cells maintaining the time advance timer in accordance with the corresponding time advance indication information.

[0232] Optionally, retaining and / or maintaining the time advance value of at least one candidate cell based on the time advance indication information includes: applying the candidate cell time advance value and retaining the time advance value according to the corresponding time advance indication information, and / or, other candidate cells retaining their time advance values ​​according to the corresponding time advance indication information.

[0233] Optionally, the terminal device retains and / or maintains advance maintenance information based on its own discretion, including at least one of the following:

[0234] Based on the terminal device's autonomous retention and / or maintenance time advance information, maintain the time advance timer of at least one candidate cell to run;

[0235] Based on the terminal device's autonomous retention and / or maintenance time advance information, it is considered that at least one candidate cell's time advance timer has not expired;

[0236] Based on the terminal equipment's autonomous retention and / or maintenance of advance time information, retain and / or maintain the advance time value of at least one candidate cell.

[0237] Optionally, maintain the time advance timer of at least one candidate cell, including at least one of the following:

[0238] Maintain at least one LTM candidate time advance timer running;

[0239] Maintain all LTM candidate time advance timers running;

[0240] Maintain the LTM candidate time advance timer as determined by the time advance indication information;

[0241] The LTM candidate time advance timer, determined based on the candidate cell identifier, is maintained.

[0242] Optionally, a candidate cell's advance timer is considered not to have timed out if at least one of the following conditions is met:

[0243] It is considered that the time advance timers of other LTM candidate timers besides the target cell time advance timer have timed out;

[0244] It is considered that at least one LTM candidate time advance timer has not timed out or has not timed out;

[0245] The LTM candidate time advance timer determined based on the time advance indication information is considered to have not timed out or not timed out;

[0246] It is considered that the LTM candidate time advance timer determined based on the candidate cell identifier has not timed out or has not timed out.

[0247] Optionally, a time advance value for at least one candidate cell may be retained and / or maintained, including at least one of the following:

[0248] Retain and / or maintain the timing advance values ​​of candidate cells other than the target cell;

[0249] Retain and / or maintain the time advance value of at least one candidate cell determined based on the time advance indication information;

[0250] Retain and / or maintain the timing advance value of at least one candidate cell determined based on the candidate cell identifier.

[0251] Optionally, at least one candidate cell includes the target cell, such as: the cell for performing conditional LTM cell handover and / or an LTM candidate cell that meets the execution conditions.

[0252] Optionally, if the time advance timer of at least one candidate cell times out, it is considered that the time advance value of at least one candidate cell has expired, and / or, the time advance value of at least one candidate cell is released and / or cleared.

[0253] Optionally, if the time advance timer of at least one candidate cell does not time out, it is considered that the time advance value of at least one candidate cell has not expired, and / or, the time advance value of at least one candidate cell is retained and / or maintained.

[0254] Optionally, if the advance timer of at least one candidate cell has not expired or continues to run, it implies that the advance timers of other candidate cells have expired or stopped running.

[0255] Optionally, retaining and / or maintaining the timing advance value of at least one candidate cell implicitly means releasing and / or clearing the timing advance values ​​of other LTM candidate cells.

[0256] Optionally, the terminal device may autonomously retain and / or maintain the corresponding candidate cell LTM candidate time advance information, for example: retain and / or maintain at least one LTM candidate time advance information, and / or retain and / or maintain all LTM candidate time advance information.

[0257] Optionally, the terminal device may autonomously consider the candidate time advance timer to have timed out, for example: consider at least one LTM candidate time advance timer not to have timed out or not to have timed out, and / or consider all LTM candidate time advance timers not to have timed out or not to have timed out, and / or maintain at least one LTM candidate time advance timer in operation, and / or maintain all LTM candidate time advance timers in operation.

[0258] Through the technical solution of this embodiment, the terminal device retains and / or maintains advance time information according to the first strategy, and can retain and / or maintain advance time information according to the advance time indication information of the network device and / or the handover process, and / or can autonomously retain and / or maintain advance time information, thereby improving the processing mechanism of advance time information.

[0259] Fourth embodiment

[0260] Based on any of the foregoing embodiments of this application, this embodiment further discloses a scheme for the terminal device to retain and / or maintain advance maintenance time information according to a first strategy during the handover of a conditional LTM cell.

[0261] Optionally, the terminal device initiates a random access procedure.

[0262] Optionally, if the terminal device does not have a target cell time advance value and / or the target cell time advance value is the maximum value (FFF), a random access procedure is initiated. Optionally, F is a hexadecimal value with a binary value of 1111 and a decimal value of 16.

[0263] Optionally, when the LTM candidate time advance timer is not running and / or when the LTM candidate time advance timer expires, a random access procedure is initiated and / or a random access condition-based LTM cell handover is performed.

[0264] Optionally, after the terminal device completes the random access process, the timer T304 is stopped.

[0265] Optionally, the terminal device completes conditional LTM cell handover.

[0266] Optionally, the terminal device may send a radio resource control reconfiguration completion signaling according to its configuration schedule.

[0267] Optionally, the terminal device sends a radio resource control reconfiguration completion signaling based on the random access response uplink scheduling (UL Grant).

[0268] Optionally, the terminal device sends a radio resource control reconfiguration completion signaling to the target cell.

[0269] Optionally, when the terminal device performs a conditional LTM handover without random access and receives the first downlink and / or uplink data schedule, the conditional LTM handover is considered complete.

[0270] Optionally, the terminal device retains and / or maintains advance maintenance time information according to the first strategy.

[0271] Optionally, the terminal device retains and / or maintains advance maintenance time information during the conditional LTM handover process.

[0272] Optionally, the conditional LTM handover completion performed by the terminal device includes at least one of the following:

[0273] Send the first uplink data;

[0274] Receive new downlink data schedules and / or receive new uplink data schedules;

[0275] Send a radio resource control reconstruction completion signal;

[0276] This is considered as a RACH-less access procedure.

[0277] This is considered a completed LTM cell handover without random access or a conditional LTM cell handover.

[0278] Complete the RACH-Based random access process;

[0279] Optionally, sending a Radio Resource Control (RRC) reconstruction completion signaling message includes receiving a Hybrid Automatic Repeat Request (HARQ) ACK.

[0280] Optionally, the terminal device retains and / or maintains advance time information, including at least one of the following: maintaining the advance timer of at least one candidate cell in operation, treating the advance timer of at least one candidate cell as not having expired, and retaining and / or maintaining the advance value of at least one candidate cell.

[0281] Optionally, maintain the time advance timer of at least one candidate cell, including at least one of the following:

[0282] Maintain at least one LTM candidate time advance timer running;

[0283] Maintain all LTM candidate time advance timers running;

[0284] Maintain the LTM candidate time advance timer as determined by the time advance indication information;

[0285] The LTM candidate time advance timer, determined based on the candidate cell identifier, is maintained.

[0286] Optionally, a candidate cell's advance timer is considered not to have timed out if at least one of the following conditions is met:

[0287] It is considered that the time advance timers of other LTM candidate timers besides the target cell time advance timer have timed out;

[0288] It is considered that at least one LTM candidate time advance timer has not timed out or has not timed out;

[0289] The LTM candidate time advance timer determined based on the time advance indication information is considered to have not timed out or not timed out;

[0290] It is considered that the LTM candidate time advance timer determined based on the candidate cell identifier has not timed out or has not timed out.

[0291] Optionally, a time advance value for at least one candidate cell may be retained and / or maintained, including at least one of the following:

[0292] Retain and / or maintain the timing advance values ​​of candidate cells other than the target cell;

[0293] Retain and / or maintain the time advance value of at least one candidate cell determined based on the time advance indication information;

[0294] Retain and / or maintain the timing advance value of at least one candidate cell determined based on the candidate cell identifier.

[0295] Optionally, at least one candidate cell includes the target cell, such as: the cell for performing conditional LTM cell handover and / or an LTM candidate cell that meets the execution conditions.

[0296] Optionally, if the time advance timer of at least one candidate cell times out, it is considered that the time advance value of at least one candidate cell has expired, and / or, the time advance value of at least one candidate cell is released and / or cleared.

[0297] Optionally, if the time advance timer of at least one candidate cell does not time out, it is considered that the time advance value of at least one candidate cell has not expired, and / or, the time advance value of at least one candidate cell is retained and / or maintained.

[0298] Optionally, if the advance timer of at least one candidate cell has not expired or continues to run, it implies that the advance timers of other candidate cells have expired or stopped running.

[0299] Optionally, retaining and / or maintaining the timing advance value of at least one candidate cell implicitly means releasing and / or clearing the timing advance values ​​of other LTM candidate cells.

[0300] Optionally, the terminal device may autonomously retain and / or maintain the corresponding candidate cell LTM candidate time advance information, for example: retain and / or maintain at least one LTM candidate time advance information, and / or retain and / or maintain all LTM candidate time advance information.

[0301] Optionally, the terminal device may autonomously consider the candidate time advance timer to have timed out, for example: consider at least one LTM candidate time advance timer not to have timed out or not to have timed out, and / or consider all LTM candidate time advance timers not to have timed out or not to have timed out, and / or maintain at least one LTM candidate time advance timer in operation, and / or maintain all LTM candidate time advance timers in operation.

[0302] Optionally, at least one of the following can be generated or determined based on the terminal device's autonomous retention and / or maintenance time advance information: a retention time advance indication, a release time advance indication, and a second candidate cell identifier.

[0303] Optionally, the second candidate cell identifier may be the same as, different from, or partially the same as the first candidate cell identifier.

[0304] Optionally, the radio resource control reconfiguration completion signaling carries at least one of a retention time advance indication, a release time advance indication, and a second candidate cell identifier.

[0305] Optionally, when the terminal device retains and / or maintains the time advance values ​​of all LTM candidate cells, the Radio Resource Control (RRC) reconfiguration completion signaling carries a retention time advance indication.

[0306] Optionally, when the terminal device retains and / or maintains the time advance value of at least one LTM candidate cell, the Radio Resource Control Reconfiguration Completion Signalling carries the retention time advance indication and the second candidate cell identifier.

[0307] The technical solution of this embodiment specifically improves the processing mechanism of advance time information by enabling the terminal device to retain and / or maintain advance time information according to the first strategy during the handover process of conditional LTM cell, and / or to enable the network device to know that the terminal device can autonomously retain and / or maintain advance time information by using advance time indication and / or second candidate cell identifier. This can support the reduction of signaling overhead, and / or the reduction of cell handover latency, and / or the reduction of service interruption duration.

[0308] Fifth Embodiment

[0309] Reference Figure 7 , Figure 7 As shown in the fifth embodiment, this embodiment further discloses a scheme for the terminal device to retain and / or maintain advance information according to a first strategy in the event of a failure of conditional LTM cell handover, based on any of the foregoing embodiments of this application.

[0310] Optionally, timer T304 is started during the process of de-splitting the terminal from the source cell and applying the target cell configuration.

[0311] Optionally, if timer T304 times out, the terminal device replies with the source cell context configuration, as detailed in protocol TS 38.331 Release 18, 5.3.5.8.3.

[0312] Optionally, if timer T304 times out, the terminal device initiates a radio resource control reconstruction.

[0313] Optionally, the terminal device stops timer T304.

[0314] Optionally, if the conditional LTM handover configuration includes attempting an LTM handover, then cell selection is performed; if the conditional LTM handover configuration does not include attempting an LTM handover, then a MAC reset is performed, and / or, information on advance maintenance time is retained according to the first policy.

[0315] Optionally, performing a MAC reset includes preserving and / or maintaining advance information according to the first policy.

[0316] Optionally, the terminal device performs cell selection and / or selects a suitable cell.

[0317] Optionally, when an LTM handover attempt is configured and the selected cell is a candidate cell in the LTM handover configuration or conditional LTM handover configuration, an LTM handover or conditional LTM handover is performed; when the selected cell is not a candidate cell in the LTM handover configuration or conditional LTM handover configuration, but an LTM handover attempt is configured, a MAC reset is performed, and / or, the first policy is used to retain and / or maintain advance maintenance time information, and / or, a radio resource control reconstruction procedure is initiated.

[0318] Optionally, performing a MAC reset includes preserving and / or maintaining advance information according to the first policy.

[0319] Optionally, the retention and / or maintenance time advance information according to the first strategy includes at least one of the following: retention and / or maintenance time advance information based on conditional LTM cell handover request and / or first candidate cell identifier, retention and / or maintenance time advance information based on time advance indication information, and retention and / or maintenance time advance information based on terminal device autonomous retention and / or maintenance time advance information.

[0320] Optionally, the terminal device, based on the conditional LTM cell handover request and / or the first candidate cell identifier reservation and / or maintenance time advance information, includes at least one of the following:

[0321] Based on the conditional LTM cell handover request and / or the first candidate cell identifier, the advance timer for maintaining at least one candidate cell runs;

[0322] The advance timer for treating at least one candidate cell as a conditional LTM cell handover request and / or the first candidate cell identifier has not expired;

[0323] Based on conditional LTM cell handover requests and / or the first candidate cell identifier, retain and / or maintain the timing advance value of at least one candidate cell.

[0324] Optionally, the terminal device retains and / or maintains the maintenance time advance information based on the time advance indication information, including at least one of the following:

[0325] Maintain the time advance timer of at least one candidate cell based on the time advance indication information;

[0326] Based on the advance time indication information, it is considered that the advance timer of at least one candidate cell has not expired;

[0327] Based on the time advance indication information, retain and / or maintain the time advance value of at least one candidate cell.

[0328] Optionally, the terminal device retains and / or maintains advance maintenance information based on its own discretion, including at least one of the following:

[0329] Based on the terminal device's autonomous retention and / or maintenance time advance information, maintain the time advance timer of at least one candidate cell to run;

[0330] Based on the terminal device's autonomous retention and / or maintenance time advance information, it is considered that at least one candidate cell's time advance timer has not expired;

[0331] Based on the terminal equipment's autonomous retention and / or maintenance of advance time information, retain and / or maintain the advance time value of at least one candidate cell.

[0332] Optionally, maintain the time advance timer of at least one candidate cell, including at least one of the following:

[0333] Maintain at least one LTM candidate time advance timer running;

[0334] Maintain all LTM candidate time advance timers running;

[0335] Maintain the LTM candidate time advance timer as determined by the time advance indication information;

[0336] The LTM candidate time advance timer, determined based on the candidate cell identifier, is maintained.

[0337] Optionally, a candidate cell's advance timer is considered not to have timed out if at least one of the following conditions is met:

[0338] It is considered that the time advance timers of other LTM candidate timers besides the target cell time advance timer have timed out;

[0339] It is considered that at least one LTM candidate time advance timer has not timed out or has not timed out;

[0340] The LTM candidate time advance timer determined based on the time advance indication information is considered to have not timed out or not timed out;

[0341] It is considered that the LTM candidate time advance timer determined based on the candidate cell identifier has not timed out or has not timed out.

[0342] Optionally, a time advance value for at least one candidate cell may be retained and / or maintained, including at least one of the following:

[0343] Retain and / or maintain the timing advance values ​​of candidate cells other than the target cell;

[0344] Retain and / or maintain the time advance value of at least one candidate cell determined based on the time advance indication information;

[0345] Retain and / or maintain the timing advance value of at least one candidate cell determined based on the candidate cell identifier.

[0346] Optionally, at least one candidate cell includes the target cell, such as: the cell for performing conditional LTM cell handover and / or an LTM candidate cell that meets the execution conditions.

[0347] Optionally, if the time advance timer of at least one candidate cell times out, it is considered that the time advance value of at least one candidate cell has expired, and / or, the time advance value of at least one candidate cell is released and / or cleared.

[0348] Optionally, if the time advance timer of at least one candidate cell does not time out, it is considered that the time advance value of at least one candidate cell has not expired, and / or, the time advance value of at least one candidate cell is retained and / or maintained.

[0349] Optionally, if the advance timer of at least one candidate cell has not expired or continues to run, it implies that the advance timers of other candidate cells have expired or stopped running.

[0350] Optionally, retaining and / or maintaining the timing advance value of at least one candidate cell implicitly means releasing and / or clearing the timing advance values ​​of other LTM candidate cells.

[0351] Optionally, the terminal device may autonomously retain and / or maintain the corresponding candidate cell LTM candidate time advance information, for example: retain and / or maintain at least one LTM candidate time advance information, and / or retain and / or maintain all LTM candidate time advance information.

[0352] Optionally, the terminal device may autonomously consider the LTM candidate time advance timer to have timed out, for example: consider at least one LTM candidate time advance timer not to have timed out or not to have timed out, and / or consider all LTM candidate time advance timers not to have timed out or not to have timed out, and / or maintain at least one LTM candidate time advance timer in operation, and / or maintain all LTM candidate time advance timers in operation.

[0353] Optionally, the terminal device may initiate a radio resource control reconstruction process, or perform an LTM handover, or perform a conditional LTM handover.

[0354] Optionally, the terminal device may initiate a radio resource control reconstruction process, which can be referred to in TS 38.331 Release 18, 5.3.7.

[0355] Optionally, the terminal device performs LTM handover, which can be referenced in protocol TS 38.331 Release 18, 5.3.5.18.6.

[0356] Optionally, during the execution of conditional LTM switching, the terminal device may retain and / or maintain time advance information according to the first strategy, and may refer to the aforementioned third and / or fourth embodiments.

[0357] The technical solution of this embodiment, specifically by having the terminal device retain and / or maintain advance time information according to the first strategy when the conditional LTM cell handover fails, can improve the processing mechanism of advance time information, thereby supporting the reduction of signaling overhead, and / or, supporting the reduction of cell handover latency, and / or, supporting the reduction of service interruption duration.

[0358] Sixth Embodiment

[0359] Reference Figure 8 , Figure 8This is a flowchart illustrating the processing method according to the sixth embodiment. The method described in this embodiment can be applied to network devices (such as base stations) and includes the following steps:

[0360] S1: Send conditional LTM configuration information to enable the terminal device to retain and / or maintain time advance information according to the first policy.

[0361] Optionally, the network device sends conditional LTM configuration information to the terminal device.

[0362] Optionally, the terminal device receives conditional LTM configuration information sent by the network device.

[0363] Optionally, the conditional LTM configuration information carries at least one LTM candidate time advance timer.

[0364] Optionally, the terminal device retains and / or maintains advance maintenance time information according to the first strategy, including at least one of the following:

[0365] The terminal device is based on the conditional LTM cell handover request and / or the first candidate cell identifier retention and / or maintenance time advance information;

[0366] The terminal device retains and / or maintains advance maintenance time information based on advance time indication information;

[0367] The terminal device retains and / or maintains advance maintenance time information based on its own autonomous retention of such information.

[0368] Optionally, the conditional LTM cell handover request and / or the first candidate cell identifier are sent by the terminal device from the radio resource control layer to the media access control layer.

[0369] Optionally, the time advance indication information is carried in the LTM candidate time advance command MAC CE.

[0370] Optionally, the terminal device starts a time advance timer for at least one candidate cell based on the LTM candidate time advance command MAC CE.

[0371] Optionally, the terminal device may retain and / or maintain advance maintenance time information when performing a media access control reset and / or conditional LTM cell handover.

[0372] Optionally, the terminal device sends a reservation time advance indication and / or a second candidate cell identifier to the network device.

[0373] Optionally, the advance retention time indication and / or the second candidate cell identifier are generated or determined based on the terminal device's autonomous retention and / or advance maintenance time information.

[0374] Optionally, the network device receives a retention time advance indication and / or a second candidate cell identifier sent by the terminal device.

[0375] Optionally, the advance retention time indication and / or the second candidate cell identifier are used to enable the network device to know the candidate cells for the terminal device to perform advance retention and / or maintenance information.

[0376] Optionally, retaining and / or maintaining advance information includes at least one of the following: keeping the advance timer of at least one candidate cell running, treating the advance timer of at least one candidate cell as not having expired, and retaining and / or maintaining the advance value of at least one candidate cell.

[0377] Optionally, the terminal device, based on the conditional LTM cell handover request and / or the first candidate cell identifier reservation and / or maintenance time advance information, includes at least one of the following:

[0378] The terminal device maintains a time advance timer for at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier.

[0379] The terminal device considers the advance timer of at least one candidate cell to be based on the conditional LTM cell handover request and / or the first candidate cell identifier, and the timer has not expired.

[0380] The terminal device retains and / or maintains the timing advance value of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier.

[0381] Optionally, the terminal device maintaining the timing advance timer of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier includes: the terminal device applying the corresponding candidate cell timing advance value according to the first candidate cell identifier, and maintaining the timing advance timers of other non-first candidate cell identifiers continuously.

[0382] Optionally, the terminal device maintaining that the advance timer of at least one candidate cell has not expired based on the conditional LTM cell handover request and / or the first candidate cell identifier includes: the terminal device applying the corresponding candidate cell advance value according to the first candidate cell identifier, and treating the advance timers of other non-first candidate cell identifiers as not having expired.

[0383] Optionally, the terminal device retains and / or maintains the timing advance value of at least one candidate cell based on the conditional LTM cell handover request and / or the first candidate cell identifier, including: the terminal device applies the corresponding candidate cell timing advance value according to the first candidate cell identifier, and retains and / or maintains the timing advance values ​​of other non-first candidate cell identifiers.

[0384] Optionally, the terminal device retains and / or maintains the maintenance time advance information based on the time advance indication information, including at least one of the following:

[0385] The terminal device maintains the time advance timer of at least one candidate cell based on the time advance indication information;

[0386] The terminal device considers, based on the time advance indication information, that the time advance timer of at least one candidate cell has not expired;

[0387] The terminal device retains and / or maintains the time advance value of at least one candidate cell based on the time advance indication information.

[0388] Optionally, the terminal device maintaining the time advance timer of at least one candidate cell based on the time advance indication information includes: the terminal device applying the candidate cell time advance value and maintaining the time advance timer continuously running according to the corresponding time advance indication information, and / or, the terminal device maintaining the time advance timer continuously running for other candidate cells according to the corresponding time advance indication information.

[0389] Optionally, the terminal device's assumption that the time advance timer of at least one candidate cell has not expired based on the time advance indication information includes: the terminal device applying the candidate cell's time advance value and maintaining the time advance timer in accordance with the corresponding time advance indication information, and / or the terminal device maintaining the time advance timer of other candidate cells in accordance with the corresponding time advance indication information.

[0390] Optionally, the terminal device retains and / or maintains the time advance value of at least one candidate cell based on the time advance indication information, including: the terminal device applies the candidate cell time advance value and retains the time advance value according to the corresponding time advance indication information, and / or the terminal device retains the time advance value of other candidate cells according to the corresponding time advance indication information.

[0391] Optionally, the terminal device retains and / or maintains advance maintenance information based on its own discretion, including at least one of the following:

[0392] The terminal device maintains the timing advance timer of at least one candidate cell based on the terminal device's autonomous retention and / or maintenance time advance information;

[0393] The terminal device considers the advance timer of at least one candidate cell to have not expired based on the terminal device's autonomous retention and / or maintenance time advance information;

[0394] The terminal device reserves and / or maintains the time advance value of at least one candidate cell based on the terminal device's autonomous retention and / or maintenance time advance information.

[0395] Optionally, the terminal device maintains a time advance timer for at least one candidate cell, including at least one of the following:

[0396] The terminal device maintains at least one LTM candidate time advance timer running;

[0397] The terminal device maintains all LTM candidate time advance timers running;

[0398] The terminal device maintains the operation of the LTM candidate time advance timer determined based on the time advance indication information;

[0399] The terminal device maintains the LTM candidate time advance timer determined based on the candidate cell identifier.

[0400] Optionally, a candidate cell's advance timer is considered not to have timed out if at least one of the following conditions is met:

[0401] It is considered that the time advance timers of other LTM candidate timers besides the target cell time advance timer have timed out;

[0402] It is considered that at least one LTM candidate time advance timer has not timed out or has not timed out;

[0403] The LTM candidate time advance timer determined based on the time advance indication information is considered to have not timed out or not timed out;

[0404] It is considered that the LTM candidate time advance timer determined based on the candidate cell identifier has not timed out or has not timed out.

[0405] Optionally, the terminal device retains and / or maintains the timing advance value of at least one candidate cell, including at least one of the following:

[0406] The terminal equipment retains and / or maintains the timing advance values ​​of candidate cells other than the target cell;

[0407] The terminal equipment retains and / or maintains the time advance value of at least one candidate cell determined based on the time advance indication information;

[0408] The terminal equipment retains and / or maintains the time advance value of at least one candidate cell determined based on the candidate cell identifier.

[0409] Optionally, at least one candidate cell includes the target cell, such as: the cell for performing conditional LTM cell handover and / or an LTM candidate cell that meets the execution conditions.

[0410] Optionally, if the time advance timer of at least one candidate cell times out, it is considered that the time advance value of at least one candidate cell has expired, and / or, the time advance value of at least one candidate cell is released and / or cleared.

[0411] Optionally, if the time advance timer of at least one candidate cell does not time out, it is considered that the time advance value of at least one candidate cell has not expired, and / or, the time advance value of at least one candidate cell is retained and / or maintained.

[0412] Optionally, if the advance timer of at least one candidate cell has not expired or continues to run, it implies that the advance timers of other candidate cells have expired or stopped running.

[0413] Optionally, retaining and / or maintaining the timing advance value of at least one candidate cell implicitly means releasing and / or clearing the timing advance values ​​of other LTM candidate cells.

[0414] Optionally, the terminal device may autonomously retain and / or maintain the corresponding candidate cell LTM candidate time advance information. For example, the terminal device may retain and / or maintain at least one LTM candidate time advance information, and / or the terminal device may retain and / or maintain all LTM candidate time advance information.

[0415] Optionally, the terminal device may autonomously consider the LTM candidate time advance timer to have timed out, for example: consider at least one LTM candidate time advance timer not to have timed out or not to have timed out, and / or consider all LTM candidate time advance timers not to have timed out or not to have timed out, and / or maintain at least one LTM candidate time advance timer in operation, and / or maintain all LTM candidate time advance timers in operation.

[0416] The technical solution of this embodiment specifically sends conditional LTM configuration information through network devices, so that terminal devices can retain and / or maintain advance time information according to the first policy. This can improve the processing mechanism of advance time information, thereby supporting the reduction of cell handover latency and / or the reduction of service interruption duration.

[0417] Seventh Embodiment

[0418] Reference Figure 9 , Figure 9 Schematic diagram of the processing apparatus provided in the embodiments of this application Figure 1 The device can be mounted on or is the terminal device in the above method embodiments. Figure 9 The processing apparatus shown can be used to perform some or all of the functions described in the method embodiments above. For example... Figure 9 As shown, the processing device 1100 includes:

[0419] Processing module 1101 is used to retain and / or maintain advance information according to a first strategy.

[0420] Optionally, based on the first strategy, information on retention and / or advance maintenance time includes at least one of the following:

[0421] Based on conditional LTM cell handover requests and / or first candidate cell identifier retention and / or maintenance time advance information;

[0422] Retain and / or maintain time advance information based on time advance indication information;

[0423] Based on the terminal device's autonomous retention and / or advance maintenance time information retention and / or advance maintenance time information.

[0424] Optionally, the conditional LTM cell handover request and / or the first candidate cell identifier are sent from the radio resource control layer to the media access control layer.

[0425] Optionally, the time advance indication information is carried in the LTM candidate time advance command MAC CE.

[0426] Optionally, the device further includes at least one of the following:

[0427] According to the LTM candidate time advance command MAC CE, start the time advance timer of at least one candidate cell;

[0428] In the event of performing a media access control reset and / or a conditional LTM cell handover, retain and / or maintain advance maintenance time information;

[0429] Send a reservation time advance indication and / or a second candidate cell identifier to the network device.

[0430] Optionally, retain and / or maintain advance maintenance time information, including at least one of the following:

[0431] Maintain the advance timer of at least one candidate cell in operation;

[0432] The advance timer for at least one candidate cell has not expired;

[0433] Retain and / or maintain the time advance value of at least one candidate cell.

[0434] Optionally, at least one candidate cell's advance timer carries conditional LTM configuration information.

[0435] Optionally, the advance retention time indication and / or the second candidate cell identifier are generated or determined based on the terminal device's autonomous retention and / or advance maintenance time information.

[0436] The processing apparatus provided in this application embodiment can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be described again here.

[0437] Eighth embodiment

[0438] Reference Figure 10 , Figure 10Schematic diagram of the processing apparatus provided in the embodiments of this application Figure 2 The device can be mounted on or is the network device in the above method embodiments. Figure 10 The processing apparatus shown can be used to perform some or all of the functions described in the method embodiments above. For example... Figure 10 As shown, the processing device 1200 includes:

[0439] The sending module 1201 is used to send conditional LTM configuration information so that the terminal device retains and / or maintains advance information according to the first strategy.

[0440] Optionally, the terminal device retains and / or maintains advance maintenance time information according to the first strategy, including at least one of the following:

[0441] The terminal device is based on the conditional LTM cell handover request and / or the first candidate cell identifier retention and / or maintenance time advance information;

[0442] The terminal device retains and / or maintains advance maintenance time information based on advance time indication information;

[0443] The terminal device retains and / or maintains advance maintenance time information based on its own autonomous retention of such information.

[0444] Optionally, the device further includes at least one of the following:

[0445] Conditional LTM configuration information carries a time advance timer for at least one candidate cell;

[0446] Conditional LTM cell handover request and / or first candidate cell identifier are sent by the terminal device from the radio resource control layer to the media access control layer;

[0447] The time advance indication information is carried in the LTM candidate time advance command MAC CE;

[0448] The terminal equipment retains and / or maintains advance maintenance time information when performing media access control reset and / or conditionally LTM cell handover.

[0449] The terminal device starts a time advance timer for at least one candidate cell based on the LTM candidate time advance command MAC CE.

[0450] Receive advance reservation time indication and / or second candidate cell identifier.

[0451] Optionally, the terminal device retains and / or maintains advance information, including at least one of the following:

[0452] The terminal device maintains a time advance timer for at least one candidate cell.

[0453] The advance timer for the terminal device to identify at least one candidate cell has not expired;

[0454] The terminal equipment retains and / or maintains the time advance value of at least one candidate cell.

[0455] The processing apparatus provided in this application embodiment can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be described again here.

[0456] See Figure 11 , Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Figure 11 As shown, the communication device 160 described in this embodiment can be a terminal device (or a component that can be used in a terminal device) or a network device (or a component that can be used in a network device) mentioned in the foregoing method embodiments. The communication device 160 can be used to implement the methods corresponding to the terminal device or network device described in the above method embodiments, as detailed in the descriptions in the above method embodiments.

[0457] The communication device 160 may include one or more processors 161, which may also be referred to as processing units, and can perform certain control or processing functions. The processor 161 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device, execute software programs, and process data from the software programs.

[0458] Optionally, the processor 161 may also store instructions 163 or data (e.g., intermediate data). Optionally, instructions 163 may be executed by the processor 161, causing the communication device 160 to perform the methods described in the above method embodiments corresponding to the terminal device or network device.

[0459] Optionally, the communication device 160 may include a circuit that can perform the functions of sending, receiving, or communicating in the foregoing method embodiments.

[0460] Optionally, the communication device 160 may include one or more memories 162, which may store instructions 164 that can be executed on the processor 161 to cause the communication device 160 to perform the methods described in the above method embodiments.

[0461] Optionally, the memory 162 may also store data. The processor 161 and the memory 162 may be configured separately or integrated together.

[0462] Optionally, the communication device 160 may further include a transceiver 165 and / or an antenna 166. The processor 161, which may be referred to as a processing unit, controls the communication device 160 (terminal device, core network device, or wireless access network device). The transceiver 165, which may be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, is used to implement the transceiver functions of the communication device 160.

[0463] Optionally, if the communication device 160 is used to implement the operation corresponding to the terminal device in the above embodiments, for example, the transceiver 165 and / or the processor 161 may receive conditional LTM configuration information.

[0464] Optionally, the specific implementation process of processor 161 and transceiver 165 can be found in the relevant descriptions of the above embodiments, and will not be repeated here.

[0465] Optionally, if the communication device 160 is used to implement the operation corresponding to the network device in the above embodiments, for example, the transceiver 165 can send conditional LTM configuration information to enable the terminal device to retain and / or maintain time advance information according to the first policy.

[0466] Optionally, the specific implementation process of processor 161 and transceiver 165 can be found in the relevant descriptions of the above embodiments, and will not be repeated here.

[0467] The processor 161 and transceiver 165 described in this application can be implemented on ICs (Integrated Circuits), analog integrated circuits, RFICs (Radio Frequency Integrated Circuits), mixed-signal integrated circuits, ASICs (Application Specific Integrated Circuits), PCBs (Printed Circuit Boards), electronic devices, etc. The processor 161 and transceiver 165 can also be manufactured using various integrated circuit process technologies, such as CMOS (Complementary Metal Oxide Semiconductor), NMOS (N-type Metal-Oxide-Semiconductor), PMOS (Positive channel Metal Oxide Semiconductor), BJT (Bipolar Junction Transistor), Bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc. In this application, the communication device can be a terminal device (such as a mobile phone) or a network device (such as a base station), depending on the context. Furthermore, 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, tablets, laptops, handheld computers, personal digital assistants (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.

[0468] Although the communication devices described above are exemplified as terminal devices or network devices, the scope of the communication devices described in this application is not limited to the aforementioned terminal devices or network devices, and the structure of the communication devices may vary. Figure 11 There are limitations. Communication equipment can be a standalone device or part of a larger device.

[0469] This application also provides a communication system, including: a terminal device as described in any of the above embodiments; and a network device as described in any of the above embodiments.

[0470] This application also provides a communication device, including a memory and a processor. The memory stores a processing program, and when the processing program is executed by the processor, it implements the steps of the processing method in any of the above embodiments.

[0471] The communication equipment mentioned in this application may be a terminal device (such as a mobile phone), a network device (such as a base station), or a chip (such as a SOC or a baseband chip with communication functions). The specific meaning needs to be clarified according to the context.

[0472] This application also provides a computer-readable storage medium storing a processing program, which, when executed by a processor, implements the steps of the processing method in any of the above embodiments.

[0473] In the embodiments of the communication device and computer-readable storage medium provided in this application, all technical features of any of the above-described processing method embodiments may be included. The extended and explanatory content of the specification is basically the same as that of the embodiments of the above methods, and will not be repeated here.

[0474] This application also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to perform the methods described in the various possible implementations above. This application also provides a chip, including a memory and a processor. The memory stores a computer program, and the processor retrieves and runs the computer program from the memory, causing a device with the chip installed to perform the methods described in the various possible implementations above.

[0475] 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, those skilled in the art will know 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 also applicable to similar technical problems. The sequence numbers of the embodiments of this application above are merely for description and do not represent the superiority or inferiority of the embodiments. The steps in the method of the embodiments of this application can be adjusted, merged, and deleted according to actual needs. The units in the device of the embodiments of this application can be merged, divided, and deleted according to actual needs. In this application, the same or similar terms, concepts, technical solutions, and / or application scenario descriptions are generally described in detail only when they appear for the first time. When they appear again later, 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, you can refer to their previous related detailed descriptions. In this application, the descriptions of each embodiment have their own emphasis. For the parts that are not described or recorded in detail in a certain embodiment, you can refer to the relevant descriptions of other embodiments. The technical features of the present application can be combined in any way. For the sake of brevity, not all possible combinations of the 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 the present application.

[0476] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they 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 this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal device, or network device, etc.) to execute the methods of each embodiment of this application. In the above embodiments, they can be implemented entirely or partially by software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented entirely or partially in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be stored in a storage medium or transmitted from one storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. Available media can be magnetic media (e.g., floppy disks, memory disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)). The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A processing method characterized by, The application is applied to a terminal device, comprising the steps of: S0: receiving an LTM candidate time advance command MAC CE, and starting a time advance timer of at least one candidate cell according to the LTM candidate time advance command MAC CE; The MAC CE carries LTM candidate cell time advance information and / or LTM candidate identification of the candidate cell; S2: in the case of performing a medium access control reset, reserving time advance information according to a first strategy; The reserved time advance information comprises: maintaining the running of the time advance timer of the at least one candidate cell; The medium access control reset is used for responding to conditional LTM switching; S3: after completing conditional LTM cell switching, reserving the time advance value of the at least one candidate cell according to terminal device autonomous reserved time advance information, and making the network device know the terminal device autonomous reserved time advance information through radio resource control reconfiguration completion signaling.

2. The method of claim 1, wherein, Step S2 comprises at least one of the following: Reserving time advance information based on conditional LTM cell switching request and / or first candidate cell identification; Reserving time advance information based on time advance indication information; Reserving time advance information based on terminal device autonomous reserved time advance information.

3. The method of claim 2, wherein, Further comprising at least one of the following: The conditional LTM cell switching request and / or the first candidate cell identification are sent to the medium access control layer by the radio resource control layer; The time advance indication information is carried in the LTM candidate time advance command MAC CE.

4. The method of claim 3, wherein, Further comprising: Sending reserved time advance indication and / or second candidate cell identification to the network device.

5. The method of claim 4, wherein, The reserved time advance information comprises at least one of the following: Considering that the time advance timer of the at least one candidate cell is not overdue; Reserving the time advance value of the at least one candidate cell.

6. The method of claim 5, wherein, Further comprising at least one of the following: The time advance timer of the at least one candidate cell is carried in the conditional LTM configuration information; The reserved time advance indication and / or the second candidate cell identification are generated or determined according to the terminal device autonomous reserved time advance information.

7. A processing method characterized by, The application is applied to a network device, comprising the steps of: S1: sending conditional LTM configuration information, so that the terminal device reserves time advance information according to a first strategy in the case of performing a medium access control reset; The reserved time advance information comprises: maintaining the running of the time advance timer of the at least one candidate cell; The medium access control reset is used for responding to conditional LTM switching; Before the step of the terminal device reserving time advance information according to the first strategy in the case of performing a medium access control reset, comprising: S0: the terminal device receives an LTM candidate time advance command MAC CE, and starts a time advance timer of at least one candidate cell according to the LTM candidate time advance command MAC CE; The MAC CE carries LTM candidate cell time advance information and / or LTM candidate identification of the candidate cell; After the step of the terminal device reserving time advance information according to the first strategy in the case of performing a medium access control reset, comprising: S3: After the terminal device completes the conditional LTM cell handover, the terminal device reserves the time advance value of at least one candidate cell according to the terminal device self-reserved time advance information, and sends the network device the terminal device self-reserved time advance information through the radio resource control reconfiguration complete signaling.

8. The method of claim 7, wherein, The terminal device reserves the time advance information according to the first strategy, including at least one of the following: The terminal device reserves the time advance information based on the conditional LTM cell handover request and / or the first candidate cell identifier; The terminal device reserves the time advance information based on the time advance indication information; The terminal device reserves the time advance information based on the terminal device self-reserved time advance information.

9. The method of claim 8, wherein, Further including at least one of the following: The conditional LTM configuration information carries the time advance timer of at least one candidate cell; The conditional LTM cell handover request and / or the first candidate cell identifier are sent by the terminal device from the radio resource control layer to the medium access control layer; The time advance indication information is carried in the LTM candidate time advance command MAC CE; The terminal device receives the reserved time advance indication and / or the second candidate cell identifier.

10. The method of claim 9, wherein, The terminal device reserves the time advance information, including at least one of the following: The terminal device considers that the time advance timer of at least one candidate cell is not overdue; The terminal device reserves the time advance value of at least one candidate cell.

11. A communication device, characterized by Including: A memory, a processor, and a processing program stored on the memory and executable on the processor, wherein the processing program is executed by the processor to implement the steps of the processing method according to any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium, and the computer program is executed by the processor to implement the steps of the processing method according to any one of claims 1 to 10.

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