Radio resource control recovery method, communication device and storage medium

Abstract

According to the technical scheme provided by the invention, a process for quickly recovering the RRC after the LTM cell switching failure is provided by responding to the condition that the preset condition is met and recovering the radio resource control, so that the network equipment can know the reason of the LTM cell switching failure, the connection is quickly recovered according to the actual condition, and the time delay for recovering the connection and / or the duration of service interruption can be reduced.

Description

Radio resource control recovery method, communication device and storage medium Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a wireless resource control recovery method, communication equipment, and storage medium. Background Art

[0002] During LTM (L1 / L2 Triggered Mobility) cell handover, when LTM cell handover fails, RRC (Radio Resource Control) needs to be restored in a timely manner.

[0003] In existing protocols, the method for restoring RRC after LTM cell handover failure has not yet been determined. The traditional RRC reconstruction process involves parameter reset and / or configuration release, resulting in long recovery delays and / or long service interruptions, and cannot quickly restore RRC after LTM cell handover failure.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Technical Solutions

[0005] The main purpose of this application is to provide a radio resource control recovery method, communication equipment and storage medium, aiming to quickly recover RRC after LTM cell handover failure.

[0006] To achieve the above objectives, the present application provides a radio resource control recovery method, which can be applied to a terminal device (such as a mobile phone), comprising the steps of:

[0007] S2: In response to a preset condition being met, resuming radio resource control.

[0008] Optionally, satisfying a preset condition includes:

[0009] The layer 1-2 triggered mobility handover timer expires and / or a fast recovery indication is recognized.

[0010] Optionally, the method further comprises at least one of the following:

[0011] Select the target cell through pre-configured information;

[0012] Select the target cell through time advance information;

[0013] Apply the target cell configuration based on the pre-configured information.

[0014] Optionally, the resuming radio resource control includes at least one of the following:

[0015] Perform a media access control partial reset;

[0016] Restore at least one signaling bearer;

[0017] Recovering at least one data bearer;

[0018] Restore the secondary cell configuration;

[0019] Restore the primary cell group;

[0020] Restore the secondary cell group;

[0021] Inherit the key.

[0022] Optionally, the method further comprises at least one of the following:

[0023] Restoring at least one signaling bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment;

[0024] The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

[0025] Optionally, resuming radio resource control includes:

[0026] Restore radio resource control by random access-free method.

[0027] Optionally, the resuming radio resource control further includes at least one of the following:

[0028] Send fast recovery request signaling;

[0029] Receive fast recovery signaling;

[0030] Send fast recovery completion signaling.

[0031] Optionally, the method further comprises at least one of the following:

[0032] The fast recovery request signaling carries the reason for the failure of the layer 1-2 triggered mobility handover;

[0033] The fast recovery signaling is used to activate and / or start at least one signaling bearer;

[0034] The fast recovery signaling is used to activate and / or start at least one data bearer;

[0035] The fast recovery signaling is used to activate and / or start at least one secondary cell.

[0036] The present application also provides a radio resource control recovery method, which can be applied to a network device (such as a base station), comprising the steps of:

[0037] S1: Send pre-configuration information and / or fast recovery indication to enable the terminal device to restore radio resource control based on the pre-configuration information and / or fast recovery indication.

[0038] Optionally, the method for determining or generating the fast recovery indication includes at least one of the following:

[0039] Reconfigure the fast recovery indication via radio resource control;

[0040] The fast recovery indication is indicated by the logical channel identifier in the media access control subheader;

[0041] The fast recovery indication is indicated by a code point and / or at least one bit in a control element of a medium access control.

[0042] Optionally, the method further comprises at least one of the following:

[0043] receiving a fast recovery request signaling;

[0044] Receive fast recovery completion signaling;

[0045] Send fast recovery signaling.

[0046] Optionally, the method further comprises at least one of the following:

[0047] The fast recovery request signaling carries the reason for the failure of the layer 1-2 triggered mobility handover;

[0048] The fast recovery signaling is used to activate and / or start at least one signaling bearer;

[0049] The fast recovery signaling is used to activate and / or start at least one data bearer;

[0050] The fast recovery signaling is used to activate and / or start at least one secondary cell.

[0051] Optionally, the method further comprises at least one of the following:

[0052] The terminal device selects the target cell through pre-configured information;

[0053] The terminal device selects the target cell through the time advance information;

[0054] The terminal device applies the target cell configuration based on the pre-configured information.

[0055] Optionally, the resuming radio resource control includes at least one of the following:

[0056] Perform a media access control partial reset;

[0057] Restore at least one signaling bearer;

[0058] Recovering at least one data bearer;

[0059] Restore the secondary cell configuration;

[0060] Restore the primary cell group;

[0061] Restore the secondary cell group;

[0062] Inherit the key.

[0063] Optionally, the method further comprises at least one of the following:

[0064] Restoring at least one signaling bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment;

[0065] The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

[0066] Optionally, resuming radio resource control includes:

[0067] The terminal device recovers the radio resource control by means of random access-free method.

[0068] The present application also provides a communication device, comprising: a memory, a processor, and a wireless resource control recovery program stored in the memory and executable on the processor, wherein the wireless resource control recovery program, when executed by the processor, implements the steps of any of the wireless resource control recovery methods described above.

[0069] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified in the context.

[0070] The present application also provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned radio resource control recovery methods are implemented.

[0071] The technical solution of the present application provides a process for quickly restoring RRC after an LTM cell handover failure by restoring wireless resource control in response to meeting preset conditions, so that the network equipment can know the reason for the LTM cell handover failure, thereby quickly restoring the connection according to the actual situation, which can reduce the delay in restoring the connection and / or the duration of service interruption. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0073] FIG1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0074] FIG2 is a diagram of a communication network system architecture provided by an embodiment of the present application;

[0075] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application;

[0076] FIG4 is a schematic diagram of the hardware structure of a network node 150 provided in this application;

[0077] FIG5 is a schematic flow chart of a radio resource control recovery method according to the first embodiment;

[0078] FIG6 is a schematic flow chart of a radio resource control recovery method according to a second embodiment;

[0079] FIG7 is a schematic flow chart of a radio resource control recovery method according to a third embodiment;

[0080] FIG8 is a schematic flow chart of a radio resource control recovery method according to a sixth embodiment;

[0081] FIG9 is a schematic diagram of an interaction sequence according to a seventh embodiment;

[0082] FIG10 is a structural diagram of a radio resource control recovery device according to an embodiment of the present application;

[0083] FIG11 is a second structural diagram of a radio resource control recovery device provided in an embodiment of the present application;

[0084] FIG12 is a schematic diagram of the structure of the communication device provided in an embodiment of the present application.

[0085] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments.

[0086] Implementation Methods of the Application

[0087] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0088] It should be noted that, in this document, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element, and / or, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0089] It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the recited features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0090] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0091] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0092] It should be noted that in this article, step codes such as S1 and S2 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial restriction on the order. When implementing the step, those skilled in the art may execute S2 first and then S1, etc., but these should all be within the scope of protection of this application.

[0093] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0094] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0095] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified based on the context.

[0096] The terminal device may be implemented in various forms. For example, the terminal device described in this application may include intelligent terminal devices such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, and other fixed terminal devices such as digital TVs and desktop computers.

[0097] The subsequent description will be made using a mobile terminal as an example. Those skilled in the art will understand that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminal devices.

[0098] Please refer to Figure 1, which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application. The mobile terminal 100 may include components such as an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will understand that the mobile terminal structure shown in Figure 1 does not limit the mobile terminal. The mobile terminal may include more or fewer components than shown, or may combine certain components, or arrange the components differently.

[0099] The following is a detailed introduction to the various components of the mobile terminal in conjunction with Figure 1:

[0100] The RF unit 101 can be used to send and receive information or receive signals during calls. Specifically, it receives downlink information from the base station and transmits it to the processor 110 for processing. It also transmits uplink data to the base station. Typically, the RF unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and / or other components. Furthermore, the RF unit 101 can communicate with the network and other devices via wireless communication. The above-mentioned wireless communications can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), 5G and 6G, etc.

[0101] WiFi is a short-range wireless transmission technology. A mobile terminal, through WiFi module 102, enables users to send and receive emails, browse web pages, and access streaming media, providing wireless broadband Internet access. Although FIG1 illustrates WiFi module 102, it is understood that it is not a required component of the mobile terminal and can be omitted as needed without altering the essence of the invention.

[0102] The audio output unit 103 can convert audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, or the like.

[0103] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos captured by an image capture device (e.g., a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the GPU 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the RF unit 101 or the WiFi module 102. The microphone 1042 may receive sound (audio data) in operating modes such as a phone call mode, a recording mode, and a voice recognition mode, and may process such sound into audio data. In the phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 101. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0104] The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described here.

[0105] 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.

[0106] The user input unit 107 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 1071) and drive corresponding connected devices according to a pre-set program. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch direction and detects the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 110. It can also receive and execute commands sent by the processor 110. And / or, the touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc., and the specifics are not limited here.

[0107] Optionally, the touch panel 1071 may overlay the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. The processor 110 then provides a corresponding visual output on the display panel 1061 based on the type of touch event. Although in FIG1 , the touch panel 1071 and the display panel 1061 are shown as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited to this specific embodiment.

[0108] The interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0109] Memory 109 can be used to store software programs and various data. Memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, / or, memory 109 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0110] Processor 110 is the control center of the mobile terminal, connecting all components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 109 and accessing data stored in memory 109, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, processor 110 may integrate an application processor and a modem processor. Optionally, the application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 110.

[0111] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0112] Although not shown in FIG. 1 , the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0113] To facilitate understanding of the embodiments of the present application, the communication network system on which the mobile terminal of the present application is based is described below.

[0114] Please refer to Figure 2, which is a communication network system architecture diagram provided in an embodiment of the present application. The communication network system is an NR (New Radio) system of universal mobile communication technology. The NR system includes UE (User Equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, EPC (Evolved Packet Core) 203 and the operator's IP service 204, which are connected in sequence.

[0115] Optionally, UE201 may be the above-mentioned terminal device 100, which will not be described in detail here.

[0116] E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 . Optionally, eNodeB 2021 may be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface). eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 may provide access from UE 201 to EPC 203 .

[0117] EPC 203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving Gate Way) 2034, a PGW (PDN Gate Way) 2035, and a PCRF (Policy and Charging Rules Function) 2036. Optionally, MME 2031 is a control node that processes signaling between UE 201 and EPC 203, providing bearer and connection management. HSS 2032 provides registers for managing functions such as the Home Location Register (not shown) and stores user-specific information such as service features and data rates. All user data can be sent through SGW2034, PGW2035 can provide IP address allocation and other functions for UE 201, PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources, and it selects and provides available policy and charging control decisions for the policy and charging execution function unit (not shown in the figure).

[0118] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services.

[0119] Although the above introduction takes the LTE system as an example, those skilled in the art should know that this application is not only applicable to the LTE system, but can also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G and future new network systems (such as 6G), etc., which are not limited here.

[0120] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application. The controller 140 includes a memory 1401 and a processor 1402. The memory 1401 is used to store program instructions, and the processor 1402 is used to call the program instructions in the memory 1401 to execute the steps performed by the controller in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0121] 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.

[0122] Figure 4 is a schematic diagram of the hardware structure of a network node 150 provided in this application. Network node 150 includes: a memory 1501 and a processor 1502. Memory 1501 is used to store program instructions, and processor 1502 is used to call the program instructions in memory 1501 to execute the steps performed by the first node in the first embodiment of the above method. The implementation principles and beneficial effects are similar and will not be repeated here.

[0123] 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.

[0124] The integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The software function modules stored in a storage medium include a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute some of the steps of the methods of various embodiments of the present application.

[0125] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, the computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive solid state disk, SSD), etc.

[0126] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0127] First embodiment

[0128] 5 , which is a flow chart of a radio resource control recovery method according to a first embodiment, the radio resource control recovery method of the embodiment of the present application can be applied to a terminal device (such as a mobile phone), comprising the steps of:

[0129] S2: In response to a preset condition being met, resuming radio resource control.

[0130] Optionally, satisfying a preset condition includes:

[0131] The layer 1-2 triggered mobility handover timer expires and / or a fast recovery indication is recognized.

[0132] In an embodiment of the present application, the wireless resource control recovery process can be initiated after the LTM (L1 / L2 triggered Mobility) cell switching fails, or it can be initiated by the terminal device based on the quick recovery indication in the pre-configuration information after the LTM cell switching fails, or it can be initiated by the terminal device through the quick recovery indication carried in the LTM switching command after the LTM cell switching fails.

[0133] Optionally, the LTM switching command is sent via MAC layer information, such as MAC CE.

[0134] Optionally, when the LTM cell switching timer times out (for example, the T304 timer times out), it is regarded as an LTM cell switching failure, and a fast recovery process is initiated.

[0135] Optionally, the method further comprises at least one of the following:

[0136] Select the target cell through pre-configured information;

[0137] Select the target cell through time advance information;

[0138] Apply the target cell configuration based on the pre-configured information.

[0139] Optionally, before executing the wireless resource control recovery process, the source cell pre-configures the LTM candidate cell. After the terminal device receives the LTM target cell pre-configuration information (optionally, it can also be saved locally), it starts the wireless resource control recovery process and executes cell selection. The target cell can be selected through the pre-configuration information, and the target cell can also be selected through the time advance information.

[0140] It should be noted that the recovery of wireless resource control in the embodiment of the present application is a recovery in a broad sense, that is, it can be the recovery of the existing state after the cell handover failure, or it can be the reconstruction of wireless resource control.

[0141] Optionally, selecting a candidate cell through pre-configuration information may be obtaining candidate cell information from the pre-configuration information, such as frequency. When performing a cell selection process, the terminal may preferentially search for cells with corresponding frequencies to perform recovery and / or reconstruction.

[0142] Optionally, the target cell selected by the time advance information may be a target cell that is preferentially selected from candidate cells that have acquired corresponding TA values ​​as the target cell for performing fast recovery and / or reconstruction.

[0143] Optionally, the pre-configuration information includes configuration parameters of at least one candidate cell, including but not limited to: candidate cell frequency, candidate cell configuration, random access parameters, measurement parameters, and scheduling (Grant) configuration parameters.

[0144] Optionally, the candidate cell configuration may be divided into a reference configuration (Reference Configuration) and / or a difference configuration (Delat Configuration).

[0145] Optionally, the candidate cell configuration may also be a complete configuration.

[0146] Optionally, when the selected cell is a pre-configured LTM candidate cell, the corresponding candidate cell complete configuration (Complete configuration) is applied.

[0147] Optionally, the complete configuration is configuration information after the terminal switches to the target cell, including but not limited to: various protocol stack configurations, such as RRC configuration, PDCP configuration, RLC configuration, MAC configuration, and Physical configuration.

[0148] Optionally, a complete configuration can be formed by combining a reference configuration and a differential configuration, including but not limited to, the reference configuration includes RRC configuration and / or PDCP configuration, and the differential configuration includes PDCP configuration and / or RLC configuration and / or MAC configuration and / or Physical configuration.

[0149] Optionally, when the selected cell is not a pre-configured LTM candidate cell, a traditional RRC re-establishment process is performed.

[0150] Optionally, the resuming radio resource control further includes at least one of the following:

[0151] Send fast recovery request signaling;

[0152] Receive fast recovery signaling;

[0153] Send fast recovery completion signaling.

[0154] Optionally, during the execution of the wireless resource control recovery process, the terminal device may send a fast recovery request signaling to the network device.

[0155] Optionally, the fast recovery process is used to quickly restore radio resource control and / or reestablish radio resource control connection after LTM handover failure, for example, the terminal quickly restores RRC connection and / or reestablishes RRC connection with the base station.

[0156] Optionally, the fast recovery request signaling carries a layer 1-2 triggered mobility handover failure reason.

[0157] Optionally, the terminal device sets LTM fast recovery request signaling and carries the reason for LTM cell switching failure (for example, LTMfailure), so that the network device can distinguish the reason for LTM cell switching failure and quickly restore the connection according to the actual situation.

[0158] Optionally, the LTM fast recovery request signaling may include: RRC reestablishment request (RRCReestablishmentRequest), RRC establishment request (RRCSetupRequest), RRC establishment completion (RRCSetupComplete), RRC reconfiguration completion (RRCReconfigurationComplete), and RRC recovery request (RRCResumeRequest).

[0159] Optionally, the network device may send a quick recovery signaling to the terminal device. The quick recovery signaling received by the terminal device may include: RRC Reestablishment (RRCReestablishment), RRC Setup (RRCSetup) or any RRC signaling for LTM failure quick recovery response. This is not specifically limited in the embodiments of the present application.

[0160] Optionally, the terminal device performs at least one of the following based on the LTM fast recovery signaling: activates and / or starts at least one signaling bearer, activates and / or starts at least one data bearer, activates and / or starts at least one secondary cell.

[0161] Optionally, the terminal device may send a fast recovery complete signaling to the network device.

[0162] Optionally, the LTM fast recovery completion signaling includes: RRC reestablishment completion (RRCReestablishmentComplete), RRC setup completion (RRCSetupComplete) or any RRC signaling used for LTM failure fast recovery completion, which is not specifically limited in the embodiments of the present application.

[0163] Optionally, the terminal device performs at least one of the following based on the LTM fast recovery completion signaling: activates and / or starts at least one signaling bearer, activates and / or starts at least one data bearer, activates and / or starts at least one secondary cell.

[0164] This embodiment, through the above-mentioned scheme, specifically by restoring radio resource control in response to meeting preset conditions, provides a process for quickly restoring RRC after an LTM cell handover failure, so that the network device can know the cause of the LTM cell handover failure, thereby quickly restoring the connection according to the actual situation, which can reduce the delay in restoring the connection and / or the duration of service interruption.

[0165] Second embodiment

[0166] Based on the first embodiment of the present application, this embodiment further discloses a method for restoring radio resource control. Referring to FIG6 , FIG6 is a flow chart of a radio resource control restoration method according to a second embodiment, showing that the radio resource control restoration method further includes at least one of the following:

[0167] S21: Perform a media access control partial reset;

[0168] Optionally, after the LTM switching timer times out, the terminal device performs a MAC (Media Access Control) partial reset (MAC Partical reset), for example: maintaining the buffer status report (BSR), maintaining the Bj value, maintaining the original cell and / or at least one candidate cell TAT (Timing Advacne Timer), etc. This is not limited in the embodiments of the present application.

[0169] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to a MAC partial reset indication carried in the LTM switching signaling.

[0170] S22: Restore at least one signaling bearer;

[0171] Optionally, the resuming at least one signaling bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

[0172] S23: Restore at least one data bearer.

[0173] Optionally, the recovering of at least one data bearer includes performing packet data convergence protocol data recovery (PDCP data recovery) and / or radio link control re-establishment (RLC re-establishment).

[0174] Optionally, after the LTM handover timer times out, the terminal device performs PDCP (Packet Data Convergence Protocol) data recovery, for example, performing PDCP data recovery on the data bearer recovered in the fast recovery process.

[0175] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0176] Optionally, after the LTM switching timer times out, the terminal device performs RLC (Radio Link Control) reestablishment, for example, performing RLC reestablishment based on the data bearer restored in the fast recovery process.

[0177] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0178] Optionally, performing radio resource control reestablishment includes:

[0179] Restore radio resource control by random access-free method.

[0180] Optionally, RLC reestablishment may also be used for signaling bearer.

[0181] Optionally, the signaling bearer may also perform PDCP re-establishment.

[0182] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0183] This embodiment, through the above-mentioned scheme, specifically accelerates the radio resource control recovery process by performing at least one of a partial reset of the media access control, restoring at least one signaling bearer, and restoring at least one data bearer, and reduces the processing delay caused by reconfiguration, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0184] Third embodiment

[0185] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a method for restoring radio resource control. Referring to FIG. 7 , FIG. 7 is a flow chart of a radio resource control restoration method according to a third embodiment, showing that the radio resource control restoration method further includes at least one of the following:

[0186] S24: Restore the secondary cell configuration;

[0187] S25: Restore the primary cell group;

[0188] S26: Restore the secondary cell group.

[0189] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell (Source cell) configuration, and retains the bearer and / or restores the secondary cell configuration.

[0190] Optionally, the bearer includes a signaling bearer (SRB) and / or a data bearer (DRB), for example, maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0191] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0192] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0193] Optionally, the secondary cell is a secondary cell of a Master Cell Group (MCG) and / or a Secondary Cell Group (SCG). For example, the fast recovery process does not delete and / or release the secondary cell.

[0194] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0195] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0196] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0197] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0198] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined by sending a fast recovery request signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0199] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0200] Optionally, after sending the fast recovery completion signaling, the terminal device enables at least one of the recovery signaling bearer, the data bearer and the secondary cell by default;

[0201] Optionally, the terminal device may enable recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling or sending the corresponding fast recovery signaling, and the terminal device may also enable recovery MCG and / or recovery SCG according to the enablement indication.

[0202] This embodiment uses the above-mentioned solution, specifically by restoring the secondary cell configuration, restoring the primary cell group, and restoring at least one of the secondary cell groups, to accelerate the wireless resource control recovery process. By retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, network signaling overhead is reduced, and the processing delay caused by reconfiguration is reduced, thereby reducing the delay in restoring the connection and / or the duration of service interruption.

[0203] Fourth embodiment

[0204] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a method for restoring radio resource control, and the radio resource control restoration method also includes reusing a key.

[0205] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection (Integrity Protection), encryption / deciphering (Ciphering / Deciphering), for example: K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0206] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0207] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0208] This embodiment adopts the above solution, specifically by continuing to use K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one key in the network is retained to avoid re-derivation and / or reconfiguration of integrity protection keys and / or encryption keys caused by key updates, thereby reducing the delay in restoring the connection and / or the duration of service interruption.

[0209] Fifth embodiment

[0210] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0211] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA (Timing Advance) values ​​have been obtained.

[0212] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0213] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0214] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0215] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0216] Optionally, the fast recovery indication is indicated by at least one bit in an information field (Information Element, IE), for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0217] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0218] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0219] Optionally, performing cell selection from candidate cells whose TA values ​​have been acquired includes: acquiring a cell with a TA value through random access triggered by PDCCH-order.

[0220] Optionally, the TA value of the candidate cell is obtained by receiving an LTM handover command and / or a random access response from the source cell.

[0221] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0222] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0223] Optionally, fast recovery is performed on the selected cell in a RACH-less manner.

[0224] Optionally, uplink data is sent in the selected restored cell through configuration scheduling (Configure Grant), for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0225] Optionally, when LTM switching is a primary cell (Pcell) and a secondary cell (Scell) exchange, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell (Source cell) as the recovered cell and executes the recovery process.

[0226] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0227] This embodiment uses the above-mentioned solution to select a cell to restore the connection specifically by indication and / or priority, determines the cell to restore the connection by the target cell TA value, or selects the original cell as the cell to restore the connection in the scenario of switching between the primary cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery, thereby reducing the recovery delay and / or service interruption time.

[0228] Sixth embodiment

[0229] 8 , which is a flow chart of a radio resource control recovery method according to a sixth embodiment, the method of the embodiment of the present application can be applied to a network device (such as a base station), including the steps of:

[0230] S1: Send pre-configuration information and / or fast recovery indication to enable the terminal device to restore radio resource control based on the pre-configuration information and / or fast recovery indication.

[0231] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0232] Optionally, the method for determining or generating the fast recovery indication includes at least one of the following:

[0233] Reconfigure the fast recovery indication via radio resource control;

[0234] The fast recovery indication is indicated by the logical channel identifier in the media access control subheader;

[0235] The fast recovery indication is indicated by a code point and / or at least one bit in a control element of a medium access control.

[0236] Optionally, the LTM switching command is sent via MAC layer information, such as MAC CE.

[0237] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0238] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0239] Optionally, the LTM switching command carrying the fast recovery indication can be indicated by the LCID (Logical Channel Identification) in the media access control subheader (MAC subheader) and / or the code point and / or at least one bit in the MAC CE (MAC Control Element).

[0240] Optionally, the terminal device performs a fast recovery process based on the fast recovery indication, including performing cell selection based on the fast recovery indication, for example: performing cell selection from pre-configured LTM candidate cells, performing cell selection from LTM candidate cells whose TA values ​​have been obtained in advance and whose TA values ​​are still valid.

[0241] Optionally, the method further comprises at least one of the following:

[0242] receiving a fast recovery request signaling;

[0243] Receive fast recovery completion signaling;

[0244] Send fast recovery signaling.

[0245] Optionally, the wireless resource control recovery process can be initiated after the LTM (L1 / L2 triggered Mobility) cell switching fails, or it can be initiated by the terminal device based on the quick recovery indication in the pre-configuration information after the LTM cell switching fails, or it can be initiated by the terminal device receiving the quick recovery indication carried in the LTM switching command by the network device after the LTM cell switching fails.

[0246] Optionally, selecting a candidate cell through pre-configuration information may be obtaining candidate cell information from the pre-configuration information, such as frequency. When performing a cell selection process, the terminal may preferentially search for cells with corresponding frequencies to perform recovery and / or reconstruction.

[0247] Optionally, the target cell selected by the time advance information may be a target cell that is preferentially selected from candidate cells that have acquired corresponding TA values ​​as the target cell for performing fast recovery and / or reconstruction.

[0248] Optionally, the pre-configuration information includes configuration parameters of at least one candidate cell, including but not limited to: candidate cell frequency, candidate cell configuration, random access parameters, measurement parameters, and scheduling configuration parameters.

[0249] Optionally, the candidate cell configuration may be divided into a reference configuration and / or a difference configuration.

[0250] Optionally, the candidate cell configuration may also be a complete configuration.

[0251] Optionally, the complete configuration is configuration information after the terminal switches to the target cell, including but not limited to: various protocol stack configurations, such as RRC configuration, PDCP configuration, RLC configuration, MAC configuration, and Physical configuration.

[0252] Optionally, a complete configuration can be formed by combining a reference configuration and a differential configuration, including but not limited to, the reference configuration includes RRC configuration and / or PDCP configuration, and the differential configuration includes PDCP configuration and / or RLC configuration and / or MAC configuration and / or Physical configuration.

[0253] Optionally, during the execution of the wireless resource control recovery process, the terminal device may send a fast recovery request signaling to the network device.

[0254] Optionally, the fast recovery request signaling carries a layer 1-2 triggered mobility handover failure reason.

[0255] Optionally, the terminal device sets LTM fast recovery request signaling and carries the reason for LTM cell switching failure (for example, LTMfailure), so that the network device can distinguish the reason for LTM cell switching failure and quickly restore the connection according to the actual situation.

[0256] Optionally, the LTM fast recovery request signaling may include: RRC re-establishment request, RRC establishment request, RRC establishment completion, and RRC reconfiguration completion.

[0257] Optionally, the network device may send a fast recovery signaling to the terminal device. The fast recovery signaling received by the terminal device may include: RRC reconstruction, RRC establishment or any RRC signaling for LTM failure fast recovery response. This is not specifically limited in the embodiments of the present application.

[0258] Optionally, the terminal device performs at least one of the following based on the LTM fast recovery signaling: activates and / or starts at least one signaling bearer, activates and / or starts at least one data bearer, activates and / or starts at least one secondary cell.

[0259] Optionally, the terminal device may send a fast recovery completion signaling to the network device.

[0260] Optionally, the LTM fast recovery completion signaling includes: RRC reconstruction completion, RRC establishment completion, or any RRC signaling used for LTM failure fast recovery completion, which is not specifically limited in the embodiments of the present application.

[0261] Optionally, the terminal device performs at least one of the following based on the LTM fast recovery completion signaling: activates and / or starts at least one signaling bearer, activates and / or starts at least one data bearer, activates and / or starts at least one secondary cell.

[0262] This embodiment uses the above-mentioned scheme, specifically by sending pre-configuration information and / or quick recovery indication, so that the terminal device can restore radio resource control based on the pre-configuration information and / or quick recovery indication. It can flexibly configure and / or instruct the terminal device whether to perform quick recovery. The terminal device executes the quick recovery RRC process according to the quick recovery indication, so that the network device can know the reason for the LTM cell switching failure, thereby quickly restoring the connection according to the actual situation, which can reduce the delay in restoring the connection and / or the duration of service interruption.

[0263] Seventh embodiment

[0264] 9 , which is a schematic diagram of an interaction sequence according to a seventh embodiment.

[0265] In an embodiment of the present application, a network device (eg, a base station) sends pre-configuration information and / or a quick recovery indication to a terminal device (eg, a mobile phone).

[0266] Optionally, the network device includes a first network device and / or a second network device.

[0267] Optionally, the terminal device reports an MR (Measurement Report), and optionally, the measurement report is an L3 (Layer 3) measurement report.

[0268] Optionally, the first network device (ie, the source cell) pre-configures the LTM candidate cell and / or candidate cell measurement parameters; and the terminal device receives the LTM target cell pre-configuration and stores it locally.

[0269] Optionally, the terminal device performs measurement according to the pre-configured candidate cell measurement configuration or the source cell activates / deactivates layer 1 measurement via MAC CE and / or DCI. When the target candidate cell meets the measurement reporting conditions, a layer 1 (L1) measurement report is reported.

[0270] Optionally, the candidate cell measurement parameter may be an L1 measurement parameter, such as a measurement frequency, a measurement resource, a reporting resource, an L1 measurement event, and the like.

[0271] Optionally, the source cell triggers the terminal to perform a random access procedure by sending DCI (Downlink Control Information), and optionally, the DCI is PDCCH-order triggering random access procedure signaling; optionally, random access preambles are initiated for multiple candidate cells through one and / or multiple PDCCH-order signaling triggers.

[0272] Optionally, after receiving the random access signaling triggered by PDCCH-order, the terminal device sends a random access preamble to the second network device (i.e., the candidate cell or the target cell); optionally, the terminal device sends a random access preamble to one or more candidate cells according to PDCCH-order.

[0273] Optionally, after receiving the random access preamble sent by the terminal device, the target cell calculates the TA information and sends the TA information to the source cell; optionally, the target cell also provides an uplink scheduling (UL Grant) resource cell and sends it to the source cell.

[0274] Optionally, after sending a random access preamble to the target cell, the terminal receives a TA value of the target cell in the source cell. Optionally, the TA value of the target cell is carried in a RAR (Random Access Response) and / or an LTM cell handover command sent by the source cell.

[0275] Optionally, the RAR sent by the source cell or the LTM cell handover command sent by the source cell also includes uplink scheduling of the target cell.

[0276] Optionally, the network device provides multiple target cell TA values ​​through one and / or multiple random access responses. After receiving multiple target cell TA values, the terminal device locally stores and starts corresponding Timing Advance Timers (TAT).

[0277] Optionally, the LTM cell handover command carries at least one target cell TA value. After receiving multiple target cell TA values, the terminal device locally stores and starts a corresponding Timing Advance Timer (TAT).

[0278] Optionally, after receiving the LTM cell switching command, the terminal device starts an LTM switching timer, for example, T304 or an LTM switching process timer.

[0279] Optionally, the terminal device performs random access-free switching to the target cell based on the TA value of the target cell, and sends RRC reconfiguration complete (RRCReconfigurationComplete) signaling and / or sends uplink data according to the uplink scheduling configuration while the LTM cell switching timer is running. Optionally, due to various reasons, the target cell fails to successfully receive the RRC reconfiguration complete signaling and / or uplink data sent by the terminal, so the terminal cannot receive feedback information from the target cell regarding the RRC reconfiguration complete signaling and / or uplink data sent uplink. When the LTM cell switching timer times out, it is deemed that the LTM cell switching has failed, and the fast recovery process is initiated.

[0280] Optionally, starting the quick recovery process specifically includes:

[0281] Perform cell selection.

[0282] Optionally, cell selection is performed through any of the aforementioned embodiment examples.

[0283] Optionally, the terminal restores at least one signaling bearer and / or data bearer, and a secondary cell through the aforementioned embodiment examples.

[0284] When the selected cell is a pre-configured LTM candidate cell, the complete configuration of the corresponding candidate cell is applied; optionally, when the selected cell is not a pre-configured LTM candidate cell, the RRC re-establishment process is performed;

[0285] Set LTM fast recovery request signaling and carry the reason for LTM cell handover failure, for example: LTMfailure.

[0286] Send LTM fast recovery request signaling.

[0287] Optionally, the LTM fast recovery request signaling includes: RRC re-establishment request, RRC establishment request, RRC establishment completion, and RRC reconfiguration completion.

[0288] Optionally, after sending the LTM fast recovery request signaling, the method further includes: receiving the LTM fast recovery signaling.

[0289] Optionally, the LTM fast recovery signaling includes: RRC reconstruction, RRC establishment, or any RRC signaling used for LTM fast recovery response.

[0290] Optionally, the terminal device activates and / or starts at least one recovery signaling bearer and / or recovery data bearer and / or recovery secondary cell according to the LTM fast recovery command.

[0291] Optionally, after receiving the LTM fast recovery signaling, the method further includes: sending an LTM fast recovery completion signaling.

[0292] Optionally, the LTM fast recovery completion signaling includes: RRC reestablishment completion, RRC establishment completion, or any RRC signaling for LTM failure fast recovery completion. Optionally, the terminal device activates and / or starts at least one recovery signaling bearer and / or recovery data bearer and / or recovery secondary cell.

[0293] This embodiment uses the above-mentioned scheme to determine the complete LTM fast recovery process and specifically sends pre-configuration information and / or fast recovery instructions through the network device, so that the terminal device can restore wireless resource control based on the pre-configuration information and / or fast recovery instructions, and provides a process for quickly restoring RRC after the LTM cell switching fails, so that the network device can know the reason for the LTM cell switching failure, thereby quickly restoring the connection according to the actual situation, which can reduce the delay in restoring the connection and / or the duration of service interruption.

[0294] Eighth embodiment

[0295] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0296] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0297] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to a MAC partial reset indication carried in the LTM switching signaling.

[0298] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0299] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0300] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0301] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0302] Optionally, RLC reestablishment may also be used for signaling bearer.

[0303] Optionally, the signaling bearer may also perform PDCP re-establishment.

[0304] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0305] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0306] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0307] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0308] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0309] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0310] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0311] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0312] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0313] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0314] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0315] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0316] Optionally, the activation indication is indicated by a new information field, which is not limited in the embodiments of the present application.

[0317] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0318] This embodiment, through the above-mentioned scheme, specifically accelerates the wireless resource control recovery process by performing at least one of partial media access control reset, restoring at least one signaling bearer, restoring at least one data bearer, restoring the secondary cell configuration, restoring the primary cell group, and restoring the secondary cell group. By retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, network signaling overhead is reduced, and processing delays caused by reconfiguration are reduced, thereby reducing the delay in restoring the connection and / or the duration of service interruption.

[0319] Ninth embodiment

[0320] Based on any of the above embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0321] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0322] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0323] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0324] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0325] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0326] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0327] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0328] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0329] Optionally, performing cell selection from candidate cells whose TA values ​​have been acquired includes: acquiring a cell with a TA value through random access triggered by PDCCH-order.

[0330] Optionally, the TA value of the candidate cell is obtained by receiving an LTM handover command and / or a random access response from the source cell.

[0331] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0332] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0333] Optionally, fast recovery is performed on the selected cell in a random access-free manner.

[0334] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0335] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0336] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0337] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0338] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to an LTM switching MAC partial reset indication.

[0339] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0340] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0341] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0342] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0343] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0344] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0345] This embodiment uses the above-mentioned solution to select a cell to restore the connection specifically by indication and / or priority, determine the cell to restore the connection by the target cell TA value, or select the original cell as the cell to restore the connection in the primary cell and secondary cell switching scenario, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery, thereby reducing the recovery delay and / or service interruption time, and by performing a partial reset of the media access control, accelerating the radio resource control recovery process, reducing the processing delay caused by reconfiguration, thereby reducing the connection recovery delay and / or service interruption time.

[0346] Tenth embodiment

[0347] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0348] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0349] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0350] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0351] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0352] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0353] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to an LTM switching MAC partial reset indication.

[0354] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0355] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0356] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0357] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0358] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0359] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0360] Through the above-mentioned scheme, this embodiment enables the network device to flexibly configure and / or instruct the terminal device whether to perform quick recovery. The terminal device executes the quick recovery RRC process according to the quick recovery instruction, and accelerates the wireless resource control recovery process by performing a partial reset of the media access control, reducing the processing delay caused by reconfiguration, and can reduce the delay in restoring the connection and / or the duration of service interruption.

[0361] Eleventh embodiment

[0362] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0363] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0364] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to an LTM switching MAC partial reset indication.

[0365] Optionally, after the LTM handover timer times out, the terminal device performs PDCP (Packet Data Convergence Protocol) data recovery, for example, performing PDCP data recovery on the data bearers retained in the fast recovery process.

[0366] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0367] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0368] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the reconstruction indication carried by the LTM switching RLC signaling.

[0369] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0370] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0371] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0372] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0373] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0374] This embodiment uses the above-mentioned solution to accelerate the wireless resource control recovery process and reduce the processing delay caused by reconfiguration by performing a partial reset of the media access control. It also avoids the re-export and configuration of the integrity protection key and / or encryption key caused by the key update by reusing the key, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0375] Twelfth embodiment

[0376] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0377] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0378] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0379] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0380] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0381] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0382] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0383] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0384] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0385] Optionally, performing cell selection from candidate cells whose TA values ​​have been acquired includes: acquiring a cell with a TA value through random access triggered by PDCCH-order.

[0386] Optionally, the TA value of the candidate cell is obtained by receiving an LTM handover command and / or a random access response from the source cell.

[0387] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0388] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0389] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0390] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0391] Optionally, the original primary cell TAT is still running or the TAT has not timed out.

[0392] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0393] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0394] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0395] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0396] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0397] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0398] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0399] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0400] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0401] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0402] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0403] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0404] This embodiment uses the above-mentioned scheme to select a cell to restore the connection specifically by indication and / or priority, determine the cell to restore the connection by the target cell TA value, or select the original cell as the cell to restore the connection in the scenario of switching between the primary cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery, and making the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, reducing network signaling overhead, and reducing the processing delay caused by reconfiguration, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0405] Thirteenth embodiment

[0406] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0407] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0408] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0409] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0410] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0411] Optionally, the terminal device performs a fast recovery process based on the fast recovery indication, including performing cell selection based on the fast recovery indication, for example: performing cell selection from pre-configured LTM candidate cells, performing cell selection from LTM candidate cells whose TA values ​​have been obtained in advance and whose TA values ​​are still valid.

[0412] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0413] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0414] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0415] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0416] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0417] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0418] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0419] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0420] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0421] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0422] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0423] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0424] Through the above-mentioned scheme, this embodiment enables the network equipment to flexibly configure and / or instruct the terminal equipment whether to perform quick recovery. The terminal equipment executes the quick recovery RRC process according to the quick recovery instruction, and makes the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, reducing network signaling overhead and reducing the processing delay caused by reconfiguration, thereby reducing the delay in restoring the connection and / or the duration of service interruption.

[0425] Fourteenth embodiment

[0426] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0427] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0428] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0429] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0430] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0431] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0432] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0433] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0434] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0435] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0436] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0437] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0438] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0439] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0440] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0441] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0442] This embodiment, through the above-mentioned solution, specifically retains the bearer configuration and / or restores the secondary cell to make the recovery process faster and / or simpler, reduce network signaling overhead, and reduce the processing delay caused by reconfiguration; and by continuing to use the key, avoids the re-export and configuration of the integrity protection key and / or encryption key caused by the key update, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0443] Fifteenth embodiment

[0444] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0445] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0446] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0447] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0448] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0449] Optionally, the terminal device performs a fast recovery process based on the fast recovery indication, including performing cell selection based on the fast recovery indication, for example: performing cell selection from pre-configured LTM candidate cells, performing cell selection from LTM candidate cells whose TA values ​​have been obtained in advance and whose TA values ​​are still valid.

[0450] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0451] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0452] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0453] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0454] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0455] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0456] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0457] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0458] Optionally, performing cell selection from candidate cells whose TA values ​​have been acquired includes: acquiring a cell with a TA value through random access triggered by PDCCH-order.

[0459] Optionally, the TA value of the candidate cell is obtained by receiving an LTM handover command and / or a random access response from the source cell.

[0460] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0461] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0462] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0463] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0464] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0465] Optionally, the original primary cell TAT is still running or the TAT has not timed out.

[0466] Through the above-mentioned scheme, this embodiment enables the network device to flexibly configure and / or instruct the terminal device whether to perform quick recovery. The terminal device executes the quick recovery RRC process according to the quick recovery indication, and makes the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, thereby reducing network signaling overhead and reducing the processing delay caused by reconfiguration; and selects the cell to restore the connection by indication and / or priority, determines the cell to restore the connection by the target cell TA value, or selects the original cell as the cell to restore the connection in the scenario of switching between the primary cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery, thereby reducing the delay in restoring the connection and / or the duration of service interruption.

[0467] Sixteenth embodiment

[0468] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0469] Optionally, the terminal device performs a fast recovery process based on the fast recovery indication, including performing cell selection based on the fast recovery indication, for example: performing cell selection from pre-configured LTM candidate cells, performing cell selection from LTM candidate cells whose TA values ​​have been obtained in advance and whose TA values ​​are still valid.

[0470] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0471] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0472] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0473] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0474] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0475] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0476] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0477] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0478] Optionally, performing cell selection from candidate cells having acquired TA values ​​includes: acquiring cells with TA values ​​through random access triggered by PDCCH-order, and optionally, the TA values ​​of the candidate cells are obtained by receiving LTM handover commands and / or random access responses from source cells.

[0479] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0480] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0481] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0482] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0483] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0484] Optionally, the original primary cell TAT is still running or the TAT has not timed out.

[0485] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0486] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0487] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0488] This embodiment uses the above-mentioned scheme to select a cell for restoring the connection by indication and / or priority, determine the cell for restoring the connection by the TA value of the target cell, or select the original cell as the cell for restoring the connection in the scenario of switching between the primary cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell for performing recovery; and by continuing to use the key, avoiding the re-derivation and configuration of the integrity protection key and / or encryption key caused by the key update, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0489] Seventeenth embodiment

[0490] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0491] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0492] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0493] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0494] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0495] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0496] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0497] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0498] Through the above-mentioned scheme, this embodiment enables the network equipment to flexibly configure and / or instruct the terminal equipment whether to perform quick recovery. The terminal equipment executes the quick recovery RRC process according to the quick recovery instruction, and makes the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, thereby reducing network signaling overhead and processing delay caused by reconfiguration; and by continuing to use the key, it avoids the re-export and configuration of the integrity protection key and / or encryption key caused by the key update, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0499] Eighteenth embodiment

[0500] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0501] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0502] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0503] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0504] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0505] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0506] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0507] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0508] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0509] Optionally, performing cell selection from candidate cells having acquired TA values ​​includes: acquiring cells with TA values ​​through random access triggered by PDCCH-order, and optionally, the TA values ​​of the candidate cells are obtained by receiving LTM handover commands and / or random access responses from source cells.

[0510] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0511] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0512] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0513] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0514] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0515] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0516] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0517] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to a MAC partial reset indication carried in the LTM switching signaling.

[0518] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0519] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0520] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0521] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0522] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0523] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0524] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0525] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0526] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0527] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0528] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0529] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0530] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0531] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0532] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0533] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0534] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0535] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0536] This embodiment uses the above-mentioned scheme to select a cell to restore the connection specifically by indication and / or priority, determine the cell to restore the connection by the target cell TA value, or select the original cell as the cell to restore the connection in the primary cell and secondary cell switching scenario, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery; by performing at least one of resetting the media access control part, restoring at least one signaling bearer, restoring at least one data bearer, restoring the secondary cell configuration, restoring the primary cell group, and restoring the secondary cell group, the radio resource control recovery process is accelerated; by retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, network signaling overhead is reduced, and the processing delay caused by reconfiguration is reduced, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0537] Nineteenth embodiment

[0538] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0539] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0540] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0541] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0542] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0543] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0544] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to a MAC partial reset indication carried in the LTM switching signaling.

[0545] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0546] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0547] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0548] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0549] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0550] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0551] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0552] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0553] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0554] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0555] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0556] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0557] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0558] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0559] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0560] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0561] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0562] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0563] Through the above-mentioned scheme, this embodiment enables the network equipment to flexibly configure and / or instruct the terminal equipment whether to perform quick recovery. The terminal equipment executes the quick recovery RRC process according to the quick recovery instruction, and accelerates the wireless resource control recovery process by performing at least one of resetting the media access control part, restoring at least one signaling bearer, restoring at least one data bearer, restoring the secondary cell configuration, restoring the main cell group, and restoring the secondary cell group. By retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, reducing network signaling overhead and reducing the processing delay caused by reconfiguration, thereby reducing the delay in recovering the connection and / or the duration of service interruption.

[0564] Twentieth embodiment

[0565] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0566] Optionally, after the LTM switching timer times out, the terminal device performs a partial MAC reset, for example: maintaining cache status reporting, maintaining Bj value, maintaining the original cell and / or at least one candidate cell TAT, etc., which is not limited in the embodiments of the present application.

[0567] Optionally, the terminal device may perform a MAC partial reset by default during the fast recovery process, or may perform a MAC partial reset during the fast recovery process according to a MAC partial reset indication carried in the LTM switching signaling.

[0568] Optionally, after the LTM switching timer times out, the terminal device performs PDCP data recovery, for example, performing PDCP data recovery on the data bearer retained during the fast recovery process.

[0569] Optionally, the terminal device may perform PDCP data recovery by default during the fast recovery process, or may perform PDCP data recovery during the fast recovery process based on the PDCP data recovery indication carried in the LTM switching signaling.

[0570] Optionally, after the LTM switching timer times out, the terminal device performs RLC re-establishment, for example, performing RLC re-establishment based on the data bearer retained in the fast recovery process.

[0571] Optionally, the terminal device may perform RLC reconstruction by default during the fast recovery process, or may perform RLC reconstruction during the fast recovery process based on the RLC reconstruction indication carried in the LTM switching signaling.

[0572] Optionally, at least one of the aforementioned MAC partial reset, PDCP data recovery, and RLC reconstruction can be used for signaling carrying.

[0573] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0574] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0575] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0576] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0577] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0578] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0579] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0580] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0581] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0582] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0583] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0584] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0585] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0586] Optionally, at least one of MAC partial reset, PDCP data recovery, and RLC reconstruction may be performed during the fast recovery process, which is not limited in the embodiments of the present application.

[0587] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0588] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0589] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0590] This embodiment, through the above-mentioned scheme, accelerates the wireless resource control recovery process by performing at least one of the following: resetting the media access control part, restoring at least one signaling bearer, restoring at least one data bearer, restoring the secondary cell configuration, restoring the main cell group, and restoring the secondary cell group; by retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, the network signaling overhead is reduced, and the processing delay caused by reconfiguration is reduced; and by continuing to use the key, the re-export and configuration of the integrity protection key and / or encryption key caused by the key update is avoided, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0591] Twenty-first embodiment

[0592] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0593] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0594] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0595] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0596] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0597] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0598] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0599] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0600] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0601] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0602] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0603] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0604] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0605] Optionally, performing cell selection from candidate cells having acquired TA values ​​includes: acquiring cells with TA values ​​through random access triggered by PDCCH-order, and optionally, the TA values ​​of the candidate cells are obtained by receiving LTM handover commands and / or random access responses from source cells.

[0606] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0607] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0608] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0609] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0610] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0611] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0612] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0613] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0614] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0615] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0616] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0617] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0618] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0619] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0620] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0621] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0622] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0623] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0624] Through the above-mentioned scheme, this embodiment enables the network device to flexibly configure and / or instruct the terminal device whether to perform quick recovery, and the terminal device executes the quick recovery RRC process according to the quick recovery indication; and selects the cell to restore the connection by indication and / or priority, determines the cell to restore the connection by the TA value of the target cell, or selects the original cell as the cell to restore the connection in the scenario of switching between the main cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery, and making the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, reducing network signaling overhead, reducing the processing delay caused by reconfiguration, and thus reducing the delay in restoring the connection and / or the duration of service interruption.

[0625] Twenty-second embodiment

[0626] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0627] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0628] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0629] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0630] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0631] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0632] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0633] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0634] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0635] Optionally, performing cell selection from candidate cells having acquired TA values ​​includes: acquiring cells with TA values ​​through random access triggered by PDCCH-order, and optionally, the TA values ​​of the candidate cells are obtained by receiving LTM handover commands and / or random access responses from source cells.

[0636] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0637] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0638] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0639] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0640] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0641] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0642] Optionally, after the LTM switching timer times out, the terminal device maintains the current configuration and / or restores the original cell configuration, and retains the bearer and / or restores the secondary cell configuration.

[0643] Optionally, the bearer includes a signaling bearer and / or a data bearer, for example: maintaining the current signaling bearer and / or data bearer configuration, and restoring the original cell signaling bearer and / or data bearer configuration before the LTM handover.

[0644] Optionally, retaining the signaling bearer includes retaining at least one signaling bearer or retaining all signaling bearers, which is not limited in the embodiments of the present application.

[0645] Optionally, reserving data bearers includes reserving at least one data bearer or reserving all data bearers, which is not limited in the embodiments of the present application.

[0646] Optionally, the secondary cell is a secondary cell of a primary cell group and / or a secondary cell group. For example, the rapid recovery process does not delete and / or release the secondary cell.

[0647] Optionally, restoring the secondary cell includes restoring at least one secondary cell or restoring all secondary cells, which is not limited in the embodiments of the present application.

[0648] Optionally, the bearer is retained and / or the secondary cell configuration is restored by restoring the MCG and / or SCG configuration, for example, during the process of restoring the MCG configuration and / or restoring the SCG configuration, the bearer is retained and / or the secondary cell configuration is restored.

[0649] Optionally, retaining the bearer and / or restoring the secondary cell configuration is determined by recovery through indications, for example: default recovery, LTM switching command carrying a quick recovery indication, LTM switching command carrying a bearer retention indication, LTM switching command carrying a secondary cell recovery indication, and the terminal device executes the bearer retention and / or restoration of the secondary cell configuration according to the indication.

[0650] Optionally, retaining the bearer configuration further includes reestablishing a corresponding bearer packet data convergence protocol and / or radio link control.

[0651] Optionally, the activation of at least one of the recovery signaling bearer, data bearer and secondary cell is determined through fast recovery signaling. For example, after receiving the fast recovery signaling, the terminal uses the recovered signaling bearer to send or receive information, uses the data bearer to send or receive data, and uses the secondary cell to send data.

[0652] Optionally, after receiving the fast recovery signaling, the terminal device can enable at least one of the recovery signaling bearer, data bearer and secondary cell by default; or the fast recovery signaling can carry an activation indication so that the terminal device enables at least one of the recovery signaling bearer, data bearer and secondary cell according to the activation indication.

[0653] Optionally, the terminal device may enable the recovery MCG and / or recovery SCG by default after receiving the fast recovery signaling, and the terminal device may also enable the recovery MCG and / or recovery SCG according to the enablement indication.

[0654] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0655] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0656] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0657] This embodiment uses the above-mentioned scheme to select a cell to restore the connection specifically by indication and / or priority, determine the cell to restore the connection by the target cell TA value, or select the original cell as the cell to restore the connection in the scenario of switching between the primary cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery; by retaining the bearer configuration and / or restoring the secondary cell, the recovery process is made faster and / or simpler, network signaling overhead is reduced, and processing delays caused by reconfiguration are reduced; by reusing the key, the re-derivation and configuration of the integrity protection key and / or encryption key caused by the key update are avoided, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0658] Twenty-third embodiment

[0659] Based on any of the foregoing embodiments of the present application, this embodiment further discloses a radio resource control recovery method.

[0660] Optionally, the network device pre-configures a fast recovery indication and / or carries the fast recovery indication through an LTM switching command, so that the terminal device executes a fast recovery process according to the fast recovery indication.

[0661] Optionally, the quick recovery indication is used to indicate whether the terminal device performs quick recovery after LTM switching fails, for example: performs quick recovery or does not perform quick recovery, and if quick recovery is not performed, performs RRC reconstruction.

[0662] Optionally, the pre-configured fast recovery indication may be indicated by at least one bit in the information field, for example, attemptLTMPreReconfig, which is not limited in the embodiments of the present application.

[0663] Optionally, the fast recovery indication carried in the LTM switching command may be indicated by an LCID in a media access control subheader and / or a code point and / or at least one bit in a MAC CE.

[0664] Optionally, the terminal device performs a fast recovery process based on the fast recovery indication, including performing cell selection based on the fast recovery indication, for example: performing cell selection from pre-configured LTM candidate cells, performing cell selection from LTM candidate cells whose TA values ​​have been obtained in advance and whose TA values ​​are still valid.

[0665] Optionally, after the LTM switching timer times out, the terminal device performs cell selection, and the terminal device performs cell selection from pre-configured candidate cell information and / or performs cell selection from candidate cells for which TA values ​​have been obtained.

[0666] Optionally, performing cell reselection from pre-configured candidate cell information includes at least one of the following:

[0667] Selecting any one cell from preconfigured candidate cells to perform cell selection evaluation;

[0668] Performing cell selection on any cell with a fast recovery indication among the pre-configured candidate cells;

[0669] Cell selection is performed on the cell with the highest priority among the pre-configured candidate cells.

[0670] Optionally, the quick recovery indication is indicated by at least one bit in the information field, for example: LTMFastRecoveryCell, which is not limited in the embodiments of the present application.

[0671] Optionally, the cell with the highest priority among the pre-configured candidate cells includes: determining the priority according to at least one pre-configured candidate cell through at least one bit indication and / or value in the information field, for example: PriFastRecoveryCell, which is not limited in the embodiments of the present application.

[0672] Optionally, the priority is used for the order of executing cell selection when LTM handover fails.

[0673] Optionally, performing cell selection from candidate cells whose TA values ​​have been acquired includes: acquiring a cell with a TA value through random access triggered by PDCCH-order.

[0674] Optionally, the TA value of the candidate cell is obtained by receiving an LTM handover command and / or a random access response from the source cell.

[0675] Optionally, the TA value of the candidate cell is acquired through random access triggered by PDCCH-order before LTM cell switching.

[0676] Optionally, the TAT of the candidate cell whose TA value has been obtained is still running or the TAT has not timed out.

[0677] Optionally, recovery is performed on the selected cell in a random access-free manner.

[0678] Optionally, uplink data is sent in the selected restored cell by configuring scheduling, for example, uplink data is sent through pre-configured target cell uplink scheduling.

[0679] Optionally, when LTM switches to a primary cell and a secondary cell is exchanged, the fast recovery cell is the original primary cell, for example: the terminal device selects the original cell as the recovered cell and executes the recovery process.

[0680] Optionally, when the TAT of the original primary cell is still running or the TAT has not timed out, fast recovery is performed in the original cell.

[0681] Optionally, during or after the fast recovery process, the terminal device uses the original key to send and receive signaling and / or data, for example, the terminal device uses the original cell key to perform integrity protection, encryption / decryption, for example, K gNB , K RRCint , K RRCenc , K UPint and K UPenc At least one of the .

[0682] Optionally, the quick recovery process may continue to use and / or not update the key by default; or the LTM switching command may carry a non-key update indication so that the terminal device does not update the key during the quick recovery process according to the indication.

[0683] Optionally, when the cell where the connection is restored is a pre-configured candidate cell, the key is used, for example, the currently used key, the key configured and / or used before the LTM handover.

[0684] Through the above-mentioned scheme, this embodiment enables the network device to flexibly configure and / or instruct the terminal device whether to perform quick recovery. The terminal device executes the quick recovery RRC process according to the quick recovery indication, and makes the recovery process faster and / or simpler by retaining the bearer configuration and / or restoring the secondary cell, thereby reducing network signaling overhead and reducing the processing delay caused by reconfiguration; selecting the cell to restore the connection by indication and / or priority, determining the cell to restore the connection by the target cell TA value, or selecting the original cell as the cell to restore the connection in the scenario of switching between the main cell and the secondary cell, thereby reducing blind cell selection and / or accelerating the selection of the cell to perform recovery; by using the key, avoiding the re-export and configuration of the integrity protection key and / or encryption key caused by the key update, thereby reducing the delay in restoring the connection and / or the duration of the service interruption.

[0685] Please refer to Figure 10, which is a schematic diagram of the structure of a radio resource control recovery device provided in an embodiment of the present application. The device can be installed in or is the terminal device in the above-mentioned method embodiment. The radio resource control recovery device shown in Figure 10 can be used to perform some or all of the functions of the method embodiment described in the above embodiment. As shown in Figure 10, the radio resource control recovery device 110 includes:

[0686] The radio resource control recovery module 111 is configured to recover radio resource control in response to a preset condition being met.

[0687] Optionally, satisfying a preset condition includes:

[0688] The layer 1-2 triggered mobility handover timer expires and / or a fast recovery indication is recognized.

[0689] Optionally, the method further comprises at least one of the following:

[0690] Select the target cell through pre-configured information;

[0691] Select the target cell through time advance information;

[0692] Apply the target cell configuration based on the pre-configured information.

[0693] Optionally, the resuming radio resource control includes at least one of the following:

[0694] Perform a media access control partial reset;

[0695] Restore at least one signaling bearer;

[0696] Recovering at least one data bearer;

[0697] Restore the secondary cell configuration;

[0698] Restore the primary cell group;

[0699] Restore the secondary cell group;

[0700] Inherit the key.

[0701] Optionally, the device further comprises at least one of the following:

[0702] Restoring at least one signaling bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment;

[0703] The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

[0704] Optionally, performing radio resource control reestablishment includes:

[0705] Restore radio resource control by random access-free method.

[0706] Optionally, the resuming radio resource control further includes at least one of the following:

[0707] Send fast recovery request signaling;

[0708] Receive fast recovery signaling;

[0709] Send fast recovery completion signaling.

[0710] Optionally, the device further comprises at least one of the following:

[0711] The fast recovery request signaling carries the reason for the failure of the layer 1-2 triggered mobility handover;

[0712] The fast recovery signaling is used to activate and / or start at least one signaling bearer;

[0713] The fast recovery signaling is used to activate and / or start at least one data bearer;

[0714] The fast recovery signaling is used to activate and / or start at least one secondary cell.

[0715] The wireless resource control recovery device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0716] Please refer to Figure 11, which is a second structural diagram of the radio resource control recovery device provided in an embodiment of the present application. The device can be installed in or be the network device in the above method embodiment. As shown in Figure 11, the radio resource control recovery device 120 includes:

[0717] The sending module 121 is used to send pre-configuration information and / or a fast recovery indication so that the terminal device can restore radio resource control based on the pre-configuration information and / or the fast recovery indication.

[0718] Optionally, the device includes at least one of the following:

[0719] Reconfigure the fast recovery indication via radio resource control;

[0720] The fast recovery indication is indicated by the logical channel identifier in the media access control subheader;

[0721] The fast recovery indication is indicated by a code point and / or at least one bit in a control element of a medium access control.

[0722] Optionally, the device further comprises at least one of the following:

[0723] receiving a fast recovery request signaling;

[0724] Receive fast recovery completion signaling;

[0725] Send fast recovery signaling.

[0726] Optionally, the device further comprises at least one of the following:

[0727] The fast recovery request signaling carries the reason for the failure of the layer 1-2 triggered mobility handover;

[0728] The fast recovery signaling is used to activate and / or start at least one signaling bearer;

[0729] The fast recovery signaling is used to activate and / or start at least one data bearer;

[0730] The fast recovery signaling is used to activate and / or start at least one secondary cell.

[0731] Optionally, the method further comprises at least one of the following:

[0732] The terminal device selects the target cell through pre-configured information;

[0733] The terminal device selects the target cell through the time advance information;

[0734] The terminal device applies the target cell configuration based on the pre-configured information.

[0735] Optionally, the resuming radio resource control includes at least one of the following:

[0736] Perform a media access control partial reset;

[0737] Restore at least one signaling bearer;

[0738] Recovering at least one data bearer;

[0739] Restore the secondary cell configuration;

[0740] Restore the primary cell group;

[0741] Restore the secondary cell group;

[0742] Inherit the key.

[0743] Optionally, the device further comprises at least one of the following:

[0744] Restoring at least one signaling bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment;

[0745] The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

[0746] Optionally, performing radio resource control reestablishment includes:

[0747] The terminal device recovers the radio resource control by means of random access-free method.

[0748] The wireless resource control recovery device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0749] Refer to Figure 12, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 12, the communication device 140 described in this embodiment can be the terminal device (or component that can be used for a terminal device) or network device (or component that can be used for a network device) mentioned in the aforementioned method embodiment. The communication device 140 can be used to implement the methods corresponding to the terminal device or network device described in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment.

[0750] The communication device 140 may include one or more processors 141, also referred to as processing units, which may perform certain control or processing functions. Processor 141 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, while the central processing unit may be used to control the communication device, execute software programs, and process software program data.

[0751] Optionally, the processor 141 may also store instructions 143 or data (eg, intermediate data). Optionally, the instructions 143 may be executed by the processor 141, so that the communication device 140 executes the method corresponding to the terminal device or network device described in the above method embodiment.

[0752] Optionally, the communication device 140 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments.

[0753] Optionally, the communication device 140 may include one or more memories 142 , on which instructions 144 may be stored. The instructions may be executed on the processor 141 , so that the communication device 140 executes the method described in the above method embodiment.

[0754] Optionally, data may also be stored in the memory 142. The processor 141 and the memory 142 may be provided separately or integrated together.

[0755] Optionally, the communication device 140 may further include a transceiver 145 and / or an antenna 146. The processor 141 may be referred to as a processing unit, and controls the communication device 140 (terminal device, core network device, or wireless access network device). The transceiver 145 may be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, and is used to implement the transceiver functions of the communication device 140.

[0756] Optionally, if the communication device 140 is used to implement operations corresponding to the terminal device in the above-mentioned embodiments, for example, the transceiver 145 can receive pre-configuration information and / or a quick recovery indication; and the processor 141 can restore wireless resource control based on the pre-configuration information and / or the quick recovery indication.

[0757] Optionally, the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, and will not be repeated here.

[0758] Optionally, if the communication device 140 is used to implement operations corresponding to the network devices in the above embodiments, for example: the transceiver 145 can send pre-configuration information and / or quick recovery indications so that the terminal device can restore wireless resource control based on the pre-configuration information and / or quick recovery indications.

[0759] Optionally, the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, and will not be repeated here.

[0760] The processor 141 and transceiver 145 described in this application may be implemented on an IC (Integrated Circuit), an analog integrated circuit, an RFIC (Radio Frequency Integrated Circuit), a mixed-signal integrated circuit, an ASIC (Application Specific Integrated Circuit), a PCB (Printed Circuit Board), an electronic device, etc. The processor 141 and transceiver 145 may also be manufactured using various integrated circuit process technologies, such as CMOS (Complementary Metal Oxide Semiconductor), NMOS (N Metal-Oxide-Semiconductor), PMOS (Positive Channel Metal Oxide Semiconductor), BJT (Bipolar Junction Transistor), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0761] In this application, a communication device may be a terminal device (such as a mobile phone) or a network device (such as a base station), and the specific definition needs to be determined based on the context. In addition, the terminal device can be implemented in various forms. For example, the terminal devices described in this application may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminal devices such as digital TVs and desktop computers.

[0762] Although the communication device is described above by taking a terminal device or a network device as an example, the scope of the communication device described in this application is not limited to the above-mentioned terminal device or network device, and the structure of the communication device may not be limited to Figure 12. The communication device may be an independent device or may be part of a larger device.

[0763] An embodiment of the present application further provides a communication system, comprising: a terminal device as in any of the above method embodiments; and a network device as in any of the above method embodiments.

[0764] An embodiment of the present application also provides a communication device, including a memory and a processor, wherein a processing program is stored in the memory, and when the processing program is executed by the processor, the steps of the processing method in any of the above embodiments are implemented.

[0765] The communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station). The specific reference needs to be clarified based on the context.

[0766] An embodiment of the present application further provides a storage medium having a processing program stored thereon. When the processing program is executed by a processor, the steps of the processing method in any of the above embodiments are implemented.

[0767] In the embodiments of the communication device and storage medium provided in the embodiments of the present application, all technical features of any of the above-mentioned processing method embodiments may be included. The expanded and explained contents of the specification are basically the same as those of the embodiments of the above-mentioned methods and will not be repeated here.

[0768] An embodiment of the present application further provides a computer program product, which includes computer program code. When the computer program code runs on a computer, the computer executes the methods in the various possible implementation modes described above.

[0769] An embodiment of the present application also provides a chip, including a memory and a processor, wherein the memory is used to store computer programs, and the processor is used to call and run the computer programs from the memory, so that a device equipped with the chip executes the methods in the various possible implementation modes as described above.

[0770] It is understood that the above scenarios are merely examples and do not limit 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 appreciate that with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application will also be applicable to similar technical problems.

[0771] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0772] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0773] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0774] In this application, the same or similar terminology, technical solutions and / or application scenario descriptions are generally only described in detail the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, for the same or similar terminology, technical solutions and / or application scenario descriptions that are not described in detail later, you can refer to the previous relevant detailed descriptions.

[0775] In this application, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0776] The various technical features of the technical solution of this application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0777] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, controlled terminal device, or network device, etc.) to execute the method of each embodiment of the present application.

[0778] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium can be a magnetic medium (e.g., a floppy disk, a storage disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state storage disk Solid State Disk (SSD)).

[0779] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for restoring a radio resource control, wherein: Includes steps: S2: In response to satisfying a preset condition, resuming radio resource control.

2. The method of claim 1, wherein: The preset conditions are met as follows: The layer 1-2 triggered mobility switching timer expires and / or a fast recovery indication is identified.

3. The method of claim 1, wherein: The method further comprises at least one of the following: Selecting a target cell through pre-configuration information; Select the target cell through time advance information; Apply the target cell configuration according to the pre-configured information.

4. The method of claim 1, wherein: The resuming radio resource control includes at least one of the following: Perform a media access control partial reset; Restoring at least one signaling bearer; Restoring at least one data bearer; Restore the secondary cell configuration; Restore the main cell group; Restore the sub-cell group; Use the key.

5. The method of claim 4, wherein: Include at least one of the following: The restoring at least one signaling bearer comprises performing packet data convergence protocol recovery and / or radio link control reestablishment; The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

6. The method of claim 1, wherein: Restoring radio resource control includes: Restore radio resource control by random access-free method.

7. The method of claim 1, wherein: The resuming radio resource control further includes at least one of the following: Send fast recovery request signaling; receiving fast recovery signaling; Send fast recovery completion signaling.

8. The method of claim 7, wherein: The method further comprises at least one of the following: The fast recovery request signaling carries the reason for the failure of layer 1 and layer 2 triggering mobility handover; The fast recovery signaling is used to activate and / or start at least one signaling bearer; The fast recovery signaling is used to activate and / or start at least one data bearer; The fast recovery signaling is used to activate and / or start at least one secondary cell.

9. A method for recovering a radio resource control, wherein: Includes steps: S1: Send pre-configuration information and / or fast recovery indication so that the terminal device can restore radio resource control based on the pre-configuration information and / or fast recovery indication.

10. The method of claim 9, wherein: The method of determining or generating the fast recovery indication includes at least one of the following: Reconfigure the fast recovery indication via radio resource control; The fast recovery indication is indicated by the logical channel identifier in the media access control subheader; The fast recovery indication is indicated by a code point and / or at least one bit in a control element of a medium access control.

11. The method of claim 9, wherein: The method further comprises at least one of the following: receiving a fast recovery request signaling; Receive fast recovery completion signaling; Send fast recovery signaling.

12. The method of claim 11, wherein: The method further comprises at least one of the following: The fast recovery request signaling carries the reason for the failure of layer 1 and layer 2 triggering mobility handover; The fast recovery signaling is used to activate and / or start at least one signaling bearer; The fast recovery signaling is used to activate and / or start at least one data bearer; The fast recovery signaling is used to activate and / or start at least one secondary cell.

13. The method of claim 9, wherein: The method further comprises at least one of the following: The terminal device selects the target cell through the pre-configuration information; The terminal device selects the target cell through the time advance information; The terminal device applies the target cell configuration according to the pre-configuration information.

14. The method of claim 13, wherein: The resuming of radio resource control includes performing at least one of resetting a part of the media access control, resuming at least one signaling bearer, resuming at least one data bearer, resuming secondary cell configuration, resuming a primary cell group, resuming a secondary cell group, and continuing to use a key.

15. The method of claim 14, wherein: Include at least one of the following: The restoring at least one signaling bearer comprises performing packet data convergence protocol recovery and / or radio link control reestablishment; The resuming at least one data bearer includes performing packet data convergence protocol recovery and / or radio link control reestablishment.

16. The method of claim 9, wherein: Restoring radio resource control includes: The terminal device recovers the radio resource control by means of random access-free method.

17. A communication device, wherein: include: A memory, a processor, and a wireless resource control recovery program stored in the memory and executable on the processor, wherein the wireless resource control recovery program implements the steps of the wireless resource control recovery method as claimed in claim 1 or 9 when executed by the processor.

18. A storage medium, wherein: The storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the radio resource control recovery method according to claim 1 or 9 are implemented.

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