Retransmission method, communication device and storage medium

Abstract

In the present application, LTM random-access-free handover completion information is retransmitted on the basis of a grant mode, and an information retransmission mechanism suitable for an LTM handover process is thus provided, such that the reliability of transmission of the LTM random-access-free handover completion information can be improved, thereby reducing LTM handover failures and / or shortening a service interruption latency.

Description

Retransmission method, communication device and storage medium

[0001] Related applications

[0002] This application is based on the prior Chinese patent application, and in the current patent application, we hereby claim the priority of the Chinese patent application filed on September 22, 2023, with application number "202311227169.6" and application name "Retransmission method, communication equipment and storage medium" in accordance with the law. Technical Field

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

[0004] In the existing protocol, during the LTM (L1 / L2 Triggered Mobility) switching process, through configuration scheduling, LTM random access-free switching completion information including the first uplink data of LTM switching and / or RRC reconfiguration completion signaling is sent to indicate that the LTM random access-free switching is completed. The transmission of the first uplink data and / or RRC reconfiguration completion signaling plays a key role in whether the LTM switching fails.

[0005] During the process of conceiving and implementing this application, the inventors discovered that there are at least the following problems: if the reliability of the first uplink data and / or RRC reconfiguration completion signaling transmission is low, it may easily lead to LTM switching failure and / or cause service interruption delay.

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

[0007] The main purpose of this application is to provide a retransmission method, communication equipment and storage medium, aiming to provide an information retransmission mechanism suitable for the LTM switching process, so as to improve the reliability of information transmission completed by LTM random access-free switching, reduce LTM switching failures and / or reduce service interruption delays.

[0008] The present application provides a retransmission method, which can be applied to a terminal device (such as a mobile phone), comprising the steps of:

[0009] S2: Retransmit the LTM random access-free handover completion information based on the scheduling method.

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

[0011] Determining a configuration scheduling configuration based on pre-configured information;

[0012] Start the retransmission timer;

[0013] Send LTM-free random access handover completion information via the default automatic hybrid repeat request;

[0014] Select or confirm the scheduling method.

[0015] Optionally, selecting or determining a scheduling method includes:

[0016] In response to a retransmission timer expiring, determining that the scheduling mode is configuration scheduling; and / or,

[0017] In response to receiving the dynamic scheduling information, determining the scheduling mode as dynamic scheduling according to the dynamic scheduling information.

[0018] Optionally, the scheduling method includes configuration scheduling and / or dynamic scheduling.

[0019] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0020] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0021] Optionally, the dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

[0022] Optionally, determining that the scheduling mode is dynamic scheduling according to the dynamic scheduling information includes:

[0023] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM-free random access handover completion information, then determining that the scheduling mode is dynamic scheduling; and / or,

[0024] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in a running state, then the scheduling mode is determined to be dynamic scheduling.

[0025] Optionally, the method further includes:

[0026] If the dynamic scheduling information is downlink scheduling, new uplink transmission and / or downlink reception are indicated according to the downlink scheduling, and / or a retransmission timer is stopped.

[0027] Optionally, the method further comprises at least one of the following:

[0028] The network device sends pre-configuration information;

[0029] Retransmit the LTM-free random access handover completion information through the default automatic hybrid repeat request;

[0030] Retransmission is determined by indicating that the new data does not flip;

[0031] The network device receives LTM random access-free switching completion information.

[0032] The present application also provides a retransmission method, which can be applied to a network device (such as a base station), comprising the steps of:

[0033] S3: Receive the LTM random access handover completion information retransmitted by the terminal device based on the scheduling method.

[0034] Optionally, the method further comprises at least one of the following:

[0035] Sending pre-configuration information so that the terminal device selects or determines a scheduling mode based on the pre-configuration information, and retransmits the LTM random access-free handover completion information based on the scheduling mode;

[0036] Send LTM switch command;

[0037] Sending dynamic scheduling information so that the terminal device selects or determines a scheduling mode based on the dynamic scheduling information, and retransmits LTM random access-free handover completion information based on the scheduling mode;

[0038] Send confirmation information and / or new transmission schedule based on the LTM-free random access handover completion information.

[0039] Optionally, the pre-configuration information includes a retransmission timer.

[0040] Optionally, the LTM switching command is used to instruct the terminal device to perform LTM random access-free and / or start a retransmission timer.

[0041] Optionally, the dynamic scheduling information is also used to indicate new uplink transmission and / or downlink transmission of the terminal device.

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

[0043] The terminal device determines the configuration scheduling configuration based on the pre-configured information;

[0044] The terminal device starts a retransmission timer;

[0045] The terminal device sends LTM-free random access handover completion information through the default automatic hybrid repeat request;

[0046] The terminal device selects or determines the scheduling method.

[0047] Optionally, the terminal device selects or determines a scheduling mode, including:

[0048] In response to the retransmission timer expiring, the terminal device determines that the scheduling mode is configuration scheduling; and / or,

[0049] In response to receiving the dynamic scheduling information, the terminal device determines that the scheduling mode is dynamic scheduling according to the dynamic scheduling information.

[0050] Optionally, the scheduling method includes configuration scheduling and / or dynamic scheduling.

[0051] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0052] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0053] Optionally, the dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

[0054] Optionally, the terminal device determines that the scheduling mode is dynamic scheduling according to the dynamic scheduling information, including:

[0055] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM-free random access switching completion information, the terminal device determines that the scheduling mode is dynamic scheduling; and / or,

[0056] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in the running state, the terminal device determines that the scheduling mode is dynamic scheduling.

[0057] Optionally, the method further includes:

[0058] If the dynamic scheduling information is downlink scheduling, the terminal device indicates new uplink transmission and / or downlink reception according to the downlink scheduling, and / or the terminal device stops the retransmission timer.

[0059] Optionally, the method further includes:

[0060] The terminal device retransmits the LTM-free random access handover completion information through a default automatic hybrid repeat request; and / or,

[0061] The terminal device confirms retransmission by indicating no flipping of the new data.

[0062] The present application also provides a communication device, comprising: a memory, a processor, and a retransmission program stored in the memory and executable on the processor, wherein the retransmission program implements the steps of any of the above-described retransmission methods when executed by the processor.

[0063] 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.

[0064] The present application also provides a storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any of the above-mentioned retransmission methods are implemented.

[0065] The technical solution of the present application provides an information retransmission mechanism applicable to the LTM switching process by retransmitting the LTM random access-free switching completion information based on a scheduling method, which can improve the reliability of the LTM random access-free switching completion information transmission, thereby reducing LTM switching failures and / or reducing service interruption delays. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] 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.

[0067] FIG1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0068] FIG2 is a diagram of a communication network system architecture provided by an embodiment of the present application;

[0069] FIG3 is a schematic diagram of the hardware structure of a controller 140 provided in this application;

[0070] FIG4 is a schematic diagram of the hardware structure of a network node 150 provided in this application;

[0071] FIG5 is a schematic diagram of a flow chart of a retransmission method according to the first embodiment;

[0072] FIG6 is a schematic flow chart of a retransmission method according to a second embodiment;

[0073] FIG7 is a schematic diagram of a flow chart of a retransmission method according to a third embodiment;

[0074] FIG8 is a schematic diagram of an interaction process according to a fourth embodiment of the present application;

[0075] FIG9 is a schematic diagram of an interaction process according to a fifth embodiment of the present application;

[0076] FIG10 is a schematic flow chart of a retransmission method according to a sixth embodiment;

[0077] FIG11 is a first structural diagram of a retransmission device according to an embodiment of the present application;

[0078] FIG12 is a second structural diagram of a retransmission device provided in an embodiment of the present application;

[0079] FIG13 is a schematic diagram of the structure of the communication device provided in an embodiment of the present application.

[0080] 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.

[0081] Implementation Methods of the Application

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] The following is a detailed introduction to the various components of the mobile terminal in conjunction with Figure 1:

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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 identify 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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 charging, discharging, and power consumption through the power management system.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] Optionally, UE201 may be the above-mentioned terminal device 100, which will not be described in detail here.

[0111] 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 .

[0112] 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).

[0113] The IP service 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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 (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). 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 (such as a floppy disk, hard disk, tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state drive solid state disk, SSD), etc.

[0121] Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0122] First embodiment

[0123] 5 , which is a flow chart of a retransmission method according to a first embodiment, the retransmission method of the embodiment of the present application can be applied to a terminal device (such as a mobile phone), including the steps of:

[0124] S2: Retransmit the LTM random access-free handover completion information based on the scheduling method.

[0125] In existing protocols, during LTM (L1 / L2 Triggered Mobility) handovers, the candidate cell's beam indication is carried in the LTM handover command, and the source cell selects the corresponding beam based on L1 measurement reporting results. However, when the source cell indicates a suboptimal beam, when the terminal device sends the first uplink data for that indicated beam, the candidate cell cannot detect the terminal device's access due to high interference (low SINR, Signal Interference Noise Ratio).

[0126] In the embodiment of the present application, a scheduling-based information retransmission mechanism applicable to the LTM switching process is introduced to improve the reliability of the LTM random access-free switching completion information transmission including the first uplink data and / or RRC reconfiguration completion signaling.

[0127] Optionally, the source cell sends configuration information of at least one LTM candidate cell to the terminal device through RRC reconfiguration signaling.

[0128] Optionally, the terminal device receives at least one LTM candidate cell configuration information and saves it locally.

[0129] Optionally, the at least one LTM candidate cell configuration information is candidate cell pre-configuration information.

[0130] Optionally, the pre-configuration information may include a configured grant (CG) and / or a retransmission timer.

[0131] Optionally, the source cell receives the TA value provided by the candidate cell and determines the cell to perform LTM switching, and sends the TA value of the corresponding candidate cell to the terminal device via an LTM switching command.

[0132] Optionally, the terminal device receives an LTM switching command.

[0133] Optionally, the terminal device performs random access-free switching to the target candidate cell based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0134] Optionally, the terminal device sends LTM random access-free switching completion information according to the determined configuration scheduling configuration.

[0135] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0136] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0137] Optionally, the terminal device sends LTM-free random access handover completion information through a default automatic hybrid repeat request.

[0138] Optionally, the terminal device selects or determines a scheduling method, and retransmits LTM random access-free switching completion information based on the scheduling method.

[0139] Optionally, during the retransmission timer, the terminal device does not retransmit the LTM random access-free handover completion information. Optionally, if the retransmission timer times out, the terminal device determines that the scheduling mode is configuration scheduling, and retransmits the LTM random access-free handover completion information through configuration scheduling.

[0140] Optionally, during the operation of the retransmission timer, if the terminal device receives dynamic scheduling information sent by the target cell, it can determine that the scheduling mode is dynamic scheduling based on the dynamic scheduling information, and retransmit the LTM random access-free switching completion information through dynamic scheduling.

[0141] This embodiment, through the above-mentioned scheme, specifically by retransmitting the LTM random access-free handover completion information based on a scheduling method, provides an information retransmission mechanism applicable to the LTM handover process, which can improve the reliability of the LTM random access-free handover completion information transmission, thereby reducing LTM handover failures and / or reducing service interruption delays.

[0142] Second embodiment

[0143] Based on the first embodiment of the present application, this embodiment further discloses the retransmission method in the first embodiment. Referring to FIG6 , FIG6 is a flow chart of the retransmission method according to the second embodiment, showing that step S2 may further include the following before retransmitting the LTM-free random access handover completion information based on the scheduling method:

[0144] S11: Select or determine a scheduling method.

[0145] Optionally, the scheduling method includes configuration scheduling and / or dynamic scheduling.

[0146] Optionally, selecting or determining a scheduling method includes:

[0147] S111: In response to the retransmission timer timing out, determining that the scheduling mode is configuration scheduling; and / or,

[0148] S112: In response to receiving the dynamic scheduling information, determine the scheduling mode as dynamic scheduling according to the dynamic scheduling information.

[0149] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0150] Optionally, the configuration scheduling retransmission timer may also use cg-RetransmissionTimer or cg-SDT-RetransmissionTimer.

[0151] Optionally, the LTM handover retransmission timer may be cg-LTM-RetraqnsmissionTimer, which is used for random access-free LTM handover retransmission, and is not specifically limited in the embodiments of the present application.

[0152] Optionally, the embodiments of the present application consider supporting configuration scheduling and dynamic scheduling (Dynamic Grant) retransmission. Optionally, the dynamic scheduling carries retransmission scheduling indication information.

[0153] Optionally, the terminal device sends LTM random access-free switching completion information according to the determined configuration scheduling configuration.

[0154] Optionally, the retransmission timer may be started before or after sending the LTM-free random access handover completion information.

[0155] Optionally, when the retransmission timer times out, the terminal device retransmits the LTM random access handover completion information by configuring scheduling, optionally including: sending the scheduling information and / or HARQ information to the HARQ entity and further performing retransmission processing.

[0156] Optionally, the terminal device retransmits the first uplink data through a default HARQ process.

[0157] Optionally, the retransmission will not be regarded as a New Data Indicator (NDI) flip.

[0158] Optionally, the HARQ information includes at least one of the following: NDI, HARQ process identifier (HARQ Process ID).

[0159] Optionally, the new data indicator is used to indicate whether the data being sent is a new transmission or a retransmission of previously sent data. Optionally, the new data indicator is used to determine whether the data being sent is a new transmission by flipping, and to determine whether the data being sent is a retransmission by not flipping. For example, if the NDI indicator of the previously sent data was 0, if the data being sent is determined to be a retransmission, the NDI indicator for the currently sent data remains 0.

[0160] Optionally, the target cell responds to the first uplink data sent by the terminal device by sending new scheduling transmission information and regards the LTM handover as completed. Upon receiving the new scheduling transmission (New transmission) information of the target cell, the terminal device regards the candidate cell as the serving cell.

[0161] Optionally, the terminal device releases the configuration scheduling after completing the LTM switching.

[0162] Optionally, the terminal device stops the retransmission timer.

[0163] Optionally, the dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

[0164] Optionally, the terminal device may confirm whether the LTM switching is completed by determining the new transmission schedule. Optionally, if the schedule is a new downlink schedule and / or a new uplink schedule, the LTM switching is deemed to be completed.

[0165] Optionally, when the new transmission schedule is an uplink schedule and the previous transmission was via CG Type 1 or CG Type 2, if the previous transmission content is LTM random access-free switching completion information, it is regarded as a scheduling retransmission, and / or, if the previous transmission content does not include LTM random access-free switching completion information, it is regarded as LTM switching completion.

[0166] Optionally, when the new transmission schedule is an uplink schedule and the previous transmission was via CG Type 1 or CG Type 2, if the retransmission timer is still running, it is considered as a scheduled retransmission, and / or, if the retransmission timer is not running, it is considered as the LTM switching is completed.

[0167] This embodiment uses the above-mentioned scheme, specifically by determining that the scheduling mode is configuration scheduling in response to the expiration of the retransmission timer; and / or, in response to receiving dynamic scheduling information, determining that the scheduling mode is dynamic scheduling according to the dynamic scheduling information, thereby realizing that the LTM random access-free switching completion information can be retransmitted not only through configuration scheduling but also through dynamic scheduling, clarifying the processing mechanism in different situations, and / or making the scheduling mode more flexible.

[0168] Third embodiment

[0169] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the retransmission method in the foregoing embodiments. Referring to FIG. 7 , FIG. 7 is a schematic flow chart of the retransmission method according to the third embodiment, showing that step S112 determines that the scheduling mode is dynamic scheduling based on the dynamic scheduling information, including:

[0170] S1121: If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM-free random access handover completion information, then determine that the scheduling mode is dynamic scheduling; and / or,

[0171] S1122: If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in a running state, then the scheduling mode is determined to be dynamic scheduling.

[0172] Currently, for the same HARQ process, when a terminal device receives a (dynamic) schedule with a PDCCH (Physical Downlink Control Channel) that meets the C-RNTI (Cell Radio Network Temporary Identifier), regardless of whether the previous schedule was Type 1 configuration scheduling and / or Type 2 configuration scheduling (PDCCH scheduling that meets the CS-RNTI), the NDI will be considered flipped, that is, it will be considered a new transmission schedule. Therefore, the terminal device will regard the LTM random access-free handover completion information as having been successfully received by the network device and / or as LTM handover completion. However, it is possible that the network device did not successfully receive the uplink data sent by the terminal device. And / or, the current LTM handover involves both configuration scheduling and dynamic scheduling retransmission, and the dynamic scheduling cannot clearly indicate whether it is a retransmission schedule.

[0173] The embodiment of the present application considers supporting configuration scheduling and dynamic scheduling retransmission. Optionally, the dynamic scheduling carries retransmission scheduling indication information.

[0174] Optionally, the network device sends dynamic scheduling information, where the dynamic scheduling information includes uplink scheduling and / or downlink scheduling, and the terminal device further processes the information based on the dynamic scheduling information.

[0175] Optionally, if the scheduling information is downlink scheduling and the terminal device has initially sent LTM random access-free switching completion information, it is deemed that the LTM switching is completed.

[0176] Optionally, the downlink scheduling is a new sending scheduling.

[0177] Optionally, the downlink scheduling and the initial transmission of the first uplink data use the same HARQ process or a default HARQ process.

[0178] Optionally, the terminal device notifies the upper layer LTM that the switching is completed.

[0179] Optionally, if the scheduling information is uplink scheduling and the terminal device has initially sent LTM-free random access handover completion information, then:

[0180] When an uplink scheduling is received and the previous transmission was performed using configuration scheduling Type 1 or Type 2, if the previous transmission was an LTM-free random access handover completion message (including a radio resource control reconfiguration completion message and / or the first uplink data), the NDI is not flipped and it is considered as a retransmission scheduling; and / or, if the previous transmission did not include a radio resource control reconfiguration completion message or the first uplink data, the NDI is flipped and it is considered as an LTM handover completion;

[0181] And / or, when an uplink schedule is received and the previous configuration schedule is Type 1 or Type 2, if the retransmission timer is still running, the NDI is not flipped and it is regarded as a retransmission schedule; and / or, if the retransmission timer is not running, the NDI is flipped and it is regarded as the completion of the LTM switching.

[0182] Optionally, the terminal device retransmits LTM random access-free switching completion information based on dynamic scheduling.

[0183] Optionally, the network device receives LTM random access-free handover completion information.

[0184] Optionally, the terminal device sends new uplink data and / or receives new downlink data based on dynamic scheduling.

[0185] This embodiment uses the above scheme to specifically determine the scheduling mode as dynamic scheduling based on the dynamic scheduling information, including: if the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM random access-free switching completion information, then the scheduling mode is determined to be dynamic scheduling; and / or, if the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in the running state, then the scheduling mode is determined to be dynamic scheduling, providing a method for performing LTM random access-free switching completion information retransmission through dynamic scheduling, clarifying the processing mechanism under different situations, and / or making the scheduling mode more flexible.

[0186] Fourth embodiment

[0187] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the retransmission method in the foregoing embodiments.

[0188] Referring to Figure 8, Figure 8 is a schematic diagram of the interaction process shown in accordance with the fourth embodiment of the embodiment of the present application. As shown in Figure 8, the terminal device reports a measurement report (MR, Measurement Report) to the source cell. Optionally, the measurement report is a layer three (L3, Layer 3) measurement report.

[0189] Optionally, the source cell obtains at least one candidate cell configuration (LTM-Candidate) information, including: candidate cell configuration (ltm-CandidateConfig) and / or a retransmission timer.

[0190] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM handover retransmission timer, for example, cg-LTM-RetraqnsmissionTimer, which is used for retransmission of LTM random access-free handover completion information.

[0191] Optionally, the candidate cell configuration information also includes: early uplink synchronization configuration (EarlyUL-SyncConfig), configured scheduling configuration (Configured GrantConfig), candidate cell complete configuration indication (ltm-ConfigComplete), layer one measurement configuration (CSI-MeasConfig) and at least one of the new terminal equipment wireless temporary identity (newUE-Identity).

[0192] Optionally, the layer 1 measurement configuration includes: LTM channel state information resource configuration (LTM-CSI-ResourceConfig) and / or LTM channel state information report configuration (LTM-CSI-ReportConfig).

[0193] Optionally, the configuration scheduling configuration is also associated with beam information (TCI-State).

[0194] Optionally, the configuration scheduling configuration includes: configuring scheduling type 1 (CG Type 1).

[0195] Optionally, the new terminal device wireless temporary identifier includes but is not limited to at least one of C-RNTI, CS-RNTI, and cg-LTM-CS-RNTI.

[0196] Optionally, the cg-LTM-CS-RNTI is a temporary identification of a wireless network for LTM configuration scheduling retransmission, and is used for scheduling retransmission scrambling.

[0197] Optionally, the source cell sends at least one LTM candidate cell configuration information through RRC reconfiguration signaling (RRCReconfiguration) signaling.

[0198] Optionally, the terminal device receives at least one LTM candidate cell configuration information and stores it locally.

[0199] Optionally, pre-configuration (Pre-config) is reconfigured through RRC.

[0200] Optionally, the at least one LTM candidate cell configuration information is candidate cell pre-configuration information.

[0201] Optionally, the LTM candidate cell configuration information is distinguished by an identification (LTM-CandidateId).

[0202] Optionally, the terminal device sends an RRC Reconfiguration Complete (RRC Reconfiguration Complete) to the source cell.

[0203] Optionally, the terminal device performs layer 1 measurement according to the layer 1 measurement configuration.

[0204] Optionally, the terminal device performs layer 1 measurement according to MAC CE (Media Access Control Control Element) and / or DCI (Downlink Control Information) instructions.

[0205] Optionally, when at least one target candidate cell meets the requirements for layer 1 measurement reporting, a layer 1 (L1) measurement report is reported.

[0206] Optionally, the network device determines the candidate cell that needs to perform early uplink synchronization based on the layer 1 measurement reporting result and sends PDCCH-order through downlink control information to trigger the terminal device to initiate random access to the target cell to obtain the TA value of the target cell in advance.

[0207] Optionally, the DCI carries a candidate cell configuration index (LTM-CandidateId).

[0208] Optionally, the terminal device sends a random access preamble to the corresponding candidate cell based on the random access triggered by PDCCH-order.

[0209] Optionally, the terminal device determines the early uplink synchronization configuration of the corresponding cell through the candidate cell configuration index carried by the DCI, and sends a random access preamble based on the early uplink synchronization configuration.

[0210] Optionally, after receiving the random access preamble sent by the terminal device, the target candidate cell calculates the TA value and sends it to the source cell.

[0211] Optionally, the source cell receives the TA value provided by the candidate cell and determines the cell to perform LTM switching, and sends the TA value of the corresponding candidate cell to the terminal device via an LTM switching command.

[0212] Optionally, the LTM switching command also carries beam indication (TCI-State) information and / or candidate cell identifier.

[0213] Optionally, the source cell carries the TA value of the corresponding candidate cell in a random access response and sends it to the terminal device.

[0214] Optionally, the source cell sends notification information to the target candidate cell after sending the LTM handover command.

[0215] Optionally, the notification information also includes beam indication information.

[0216] Optionally, the notification information can be sent based on existing inter-base station and / or unit (e.g., gNB-CU, gNB-DU) signaling, for example, F1 interface signaling: UE CONTEXT SETUP REQUEST / RESPONSE, UE CONTEXT MODIFICATION REQUEST / RESPONSE, UL / DL RRC MESSAGE TRANSFER, and / or, for example: Xn interface signaling: HANDOVER REQUEST, HANDOVER REQUEST ACKNOWLEDGE, which is not limited in the embodiments of the present application.

[0217] Optionally, the unit includes: a distributed unit (DU) and / or a central unit (CU).

[0218] Optionally, the terminal device receives an LTM switching command.

[0219] Optionally, the terminal device performs random access-free switching to the target candidate cell based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0220] Optionally, the random access-free method further includes: the TA value of the target candidate cell is 0 and / or the TA value of the target cell is the same as that of the source cell.

[0221] Optionally, the random access-free process includes: not initiating a random access process when executing the LTM switching process.

[0222] Optionally, the terminal device sends LTM random access-free switching completion information according to the determined configuration scheduling configuration.

[0223] Optionally, the retransmission timer may also be started after sending LTM-free random access handover completion information.

[0224] Optionally, the LTM random access-free handover completion information includes: user plane data and / or RRC reconfiguration completion signaling.

[0225] Optionally, the terminal device sends LTM-free random access switching completion information through a default HARQ process, for example: HARQ ID 0.

[0226] Optionally, while the retransmission timer is running, the terminal device does not retransmit the LTM-free random access handover completion information.

[0227] Optionally, when the retransmission timer times out, the terminal device retransmits the LTM random access handover completion information by configuring scheduling, including: sending scheduling information and / or HARQ information to the HARQ entity and further performing retransmission processing.

[0228] Optionally, the terminal device retransmits the LTM-free random access switching completion information through the default (Default) HARQ process.

[0229] Optionally, the retransmission will not be regarded as a New Data Indicator (NDI) flip.

[0230] Optionally, the HARQ information includes at least one of the following: NDI, HARQ process identifier (HARQ Process ID).

[0231] Optionally, the target cell responds to the LTM random access-free switching completion information sent by the terminal device, sends new scheduling sending information and regards the LTM switching as completed.

[0232] Optionally, after receiving new scheduling transmission (New transmission) information of the target cell, the terminal device regards the candidate cell as the serving cell.

[0233] Optionally, the new scheduling transmission information includes: downlink control information sent by PDCCH, which meets the scheduling of the new transmission of the terminal device C-RNTI.

[0234] Optionally, the new transmission scheduling is downlink transmission scheduling and / or uplink transmission scheduling.

[0235] Optionally, the terminal device releases the configuration scheduling after completing the LTM switching.

[0236] Optionally, the terminal device stops configuring the scheduled retransmission timer.

[0237] Optionally, the DCI carries a retransmission scheduling indication, and the retransmission scheduling indication is no retransmission.

[0238] Optionally, notify the upper layer LTM that the switching is complete.

[0239] Optionally, the configuration scheduling retransmission timer may also use cg-RetransmissionTimer or cg-SDT-RetransmissionTimer.

[0240] This embodiment uses the above-mentioned scheme, specifically through the terminal device responding to the expiration of the retransmission timer, determining that the scheduling mode is configuration scheduling, and retransmitting the LTM random access-free switching completion information based on the configuration scheduling, so that the network device receives the LTM random access-free switching completion information, which can improve the reliability of the LTM random access-free switching completion information transmission, and / or reduce LTM switching failures, and / or reduce service interruption delay, and / or, by introducing a retransmission timer suitable for LTM switching, clarify the uplink data transmission retransmission mechanism.

[0241] Fifth embodiment

[0242] Based on any of the foregoing embodiments of the present application, this embodiment further discloses the retransmission method in the foregoing embodiments.

[0243] Refer to Figure 9, which is a schematic diagram of the interaction process according to the fifth embodiment of the embodiment of the present application. As shown in Figure 9, the terminal device reports a measurement report to the source cell. Optionally, the measurement report is a layer 3 measurement report.

[0244] Optionally, the source cell obtains at least one candidate cell configuration information, including: candidate cell configuration and / or retransmission timer.

[0245] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM handover retransmission timer, for example, cg-LTM-RetraqnsmissionTimer, which is used for retransmission of LTM random access-free handover completion information.

[0246] Optionally, the candidate cell configuration information further includes at least one of: early uplink synchronization configuration, configuration scheduling configuration, candidate cell complete configuration indication, layer 1 measurement configuration, and new terminal device radio temporary identification.

[0247] Optionally, the layer 1 measurement configuration includes: LTM channel state information resource configuration and / or LTM channel state information report configuration.

[0248] Optionally, the configuration scheduling configuration is also associated with beam information.

[0249] Optionally, the configuration scheduling configuration includes: configuring scheduling type 1.

[0250] Optionally, the new terminal device wireless temporary identifier includes but is not limited to at least one of C-RNTI, CS-RNTI, and cg-LTM-CS-RNTI.

[0251] Optionally, the source cell sends at least one LTM candidate cell configuration information through RRC reconfiguration signaling.

[0252] Optionally, the terminal device receives at least one LTM candidate cell configuration information and stores it locally.

[0253] Optionally, the pre-configuration is configured through RRC reconfiguration signaling.

[0254] Optionally, the at least one LTM candidate cell configuration information is candidate cell pre-configuration information.

[0255] Optionally, the LTM candidate cell configuration information is distinguished by identification.

[0256] Optionally, the terminal device sends RRC reconfiguration completion information to the source cell.

[0257] Optionally, the terminal device performs layer 1 measurement according to the layer 1 measurement configuration.

[0258] Optionally, the terminal device performs layer 1 measurement according to MAC CE and / or DCI instructions.

[0259] Optionally, when at least one target candidate cell meets the requirements for layer 1 measurement reporting, a layer 1 measurement report is reported.

[0260] Optionally, the network device determines the candidate cell that needs to perform early uplink synchronization based on the layer 1 measurement reporting result and sends PDCCH-order through downlink control information to trigger the terminal device to initiate random access to the target cell to obtain the TA value of the target cell in advance.

[0261] Optionally, the DCI carries a candidate cell configuration index.

[0262] Optionally, the terminal device sends a random access preamble to the corresponding candidate cell based on the random access triggered by PDCCH-order.

[0263] Optionally, the terminal device determines the early uplink synchronization configuration of the corresponding cell through the candidate cell configuration index carried by the DCI, and sends a random access preamble based on the early uplink synchronization configuration.

[0264] Optionally, after receiving the random access preamble sent by the terminal device, the target candidate cell calculates the TA value and sends it to the source cell.

[0265] Optionally, the source cell receives the TA value provided by the candidate cell and determines the cell to perform LTM switching, and sends the TA value of the corresponding candidate cell to the terminal device via an LTM switching command.

[0266] Optionally, the LTM switching command also carries beam indication information and / or candidate cell identifier.

[0267] Optionally, the source cell carries the TA value of the corresponding candidate cell in a random access response and sends it to the terminal device.

[0268] Optionally, the source cell sends notification information to the target candidate cell after sending the LTM handover command.

[0269] Optionally, the notification information also includes beam indication information.

[0270] Optionally, the notification information may be sent based on existing inter-base station and / or unit (e.g., gNB-CU, gNB-DU) signaling, which is not limited in the embodiments of the present application.

[0271] Optionally, the unit includes: a decentralized unit and / or a central unit.

[0272] Optionally, the terminal device receives an LTM switching command.

[0273] Optionally, the terminal device performs random access-free switching to the target candidate cell based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0274] Optionally, the random access-free method further includes: the TA value of the target candidate cell is 0 and / or the TA value of the target cell is the same as that of the source cell.

[0275] Optionally, the random access-free process includes: not initiating a random access process when executing the LTM switching process.

[0276] Optionally, the terminal device sends LTM random access-free switching completion information according to the determined configuration scheduling configuration.

[0277] Optionally, the retransmission timer may also be started after sending LTM-free random access handover completion information.

[0278] Optionally, the LTM random access-free handover completion information includes: user plane data and / or RRC reconfiguration completion signaling.

[0279] Optionally, the terminal device sends LTM-free random access switching completion information through a default HARQ process, for example: HARQ ID 0.

[0280] Optionally, the network device sends dynamic scheduling information, where the scheduling information includes uplink scheduling and / or downlink scheduling, and the terminal device further processes the information based on the scheduling information.

[0281] Optionally, if the scheduling information is downlink scheduling and the terminal device has initially sent LTM random access-free switching completion information, it is deemed that the LTM switching is completed.

[0282] Optionally, the downlink scheduling is a new sending scheduling.

[0283] Optionally, the downlink scheduling and the initial transmission of the first uplink data use the same HARQ process or a default HARQ process.

[0284] Optionally, the terminal device notifies the upper layer LTM that the switching is completed.

[0285] Optionally, if the terminal device has initially sent LTM-free random access handover completion information and the scheduling information is uplink scheduling, then:

[0286] When an uplink scheduling is received and the previous transmission was performed using configuration scheduling Type 1 or Type 2, if the previous transmission was LTM random access-free handover completion information, the NDI is not flipped and it is considered as a retransmission scheduling; if the previous transmission did not include LTM random access-free handover completion information, the NDI is flipped and it is considered as LTM handover completion.

[0287] And / or, when an uplink schedule is received and the previous schedule was configured as Type 1 or Type 2, if the retransmission timer is still running, the NDI is not flipped and it is considered as a retransmission schedule; if the retransmission timer is not running, the NDI is flipped and it is considered as the LTM switching is completed.

[0288] Optionally, the retransmission timer may be an LTM switching retransmission timer, for example, cg-LTM-RetraqnsmissionTimer.

[0289] Optionally, the terminal device retransmits LTM random access-free switching completion information based on dynamic scheduling.

[0290] Optionally, the network device receives LTM random access-free handover completion information.

[0291] Optionally, the configuration scheduling configuration also includes: configuring scheduling type 2 (CG Type 2).

[0292] Optionally, after the terminal device performs random-free access, it monitors the physical downlink control channel to receive downlink control information. When the downlink control information meets the CS-RNTI of the terminal device, the terminal device sends LTM random-free access switching completion information based on CG Type 2.

[0293] Optionally, when the DCI sent by the downlink control channel meets the CS-RNTI of the terminal device, the terminal device starts the retransmission timer and sends the LTM-free random access handover completion information. Optionally, the terminal device starts the configuration scheduling timer after sending the LTM-free random access handover completion information.

[0294] This embodiment uses the above-mentioned scheme, specifically through the terminal device responding to the reception of dynamic scheduling information, determining the scheduling mode as dynamic scheduling according to the dynamic scheduling information, and retransmitting the LTM random access-free switching completion information based on the dynamic scheduling, so that the network device receives the LTM random access-free switching completion information, which can improve the reliability of the LTM random access-free switching completion information transmission, and / or reduce LTM switching failures, and / or reduce service interruption delays, and / or, by introducing a retransmission timer suitable for LTM switching, clarify the uplink data transmission retransmission mechanism, and / or support type 2 configuration scheduling, making the retransmission scheduling method more flexible.

[0295] Sixth embodiment

[0296] 10 , which is a flow chart of a retransmission 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:

[0297] S3: Receive the LTM random access handover completion information retransmitted by the terminal device based on the scheduling method.

[0298] Optionally, before step S3, at least one of the following may be included:

[0299] Sending pre-configuration information so that the terminal device selects or determines a scheduling mode based on the pre-configuration information, and retransmits the LTM random access-free handover completion information based on the scheduling mode;

[0300] Send LTM switch command;

[0301] Sending dynamic scheduling information so that the terminal device selects or determines a scheduling mode based on the dynamic scheduling information, and retransmits LTM random access-free handover completion information based on the scheduling mode;

[0302] Send confirmation information and / or new transmission schedule based on the LTM-free random access handover completion information.

[0303] Optionally, the network device in the embodiment of the present application includes a first network device corresponding to the source cell and / or a second network device corresponding to the candidate cell (target cell).

[0304] Optionally, the first network device sends configuration information of at least one LTM candidate cell to the terminal device through RRC reconfiguration signaling.

[0305] Optionally, the terminal device receives at least one LTM candidate cell configuration information and saves it locally.

[0306] Optionally, the at least one LTM candidate cell configuration information is candidate cell pre-configuration information.

[0307] Optionally, the pre-configuration information may include configuration scheduling and / or retransmission timer.

[0308] Optionally, the first network device receives the TA value provided by the second network device and determines the cell on which to perform LTM switching, and sends an LTM switching command carrying the TA value of the corresponding candidate cell to the terminal device.

[0309] Optionally, the terminal device receives an LTM switching command.

[0310] Optionally, the pre-configuration information includes a retransmission timer.

[0311] Optionally, the LTM switching command is used to instruct the terminal device to perform LTM random access-free and / or start a retransmission timer;

[0312] Optionally, the dynamic scheduling information is also used to indicate new uplink transmission and / or downlink transmission of the terminal device.

[0313] Optionally, the terminal device receives an LTM switching command sent by the first network device.

[0314] Optionally, the terminal device performs random access-free switching to the target candidate cell based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0315] Optionally, the terminal device sends LTM random access-free switching completion information to the second network device according to the determined configuration scheduling configuration.

[0316] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0317] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0318] Optionally, the terminal device sends LTM-free random access handover completion information to the second network device through a default automatic hybrid repeat request.

[0319] Optionally, the terminal device selects or determines a scheduling method, and retransmits the LTM random access-free switching completion information to the second network device based on the scheduling method.

[0320] Optionally, during the retransmission timer, the terminal device does not retransmit the LTM random access-free handover completion information. Optionally, if the retransmission timer times out, the terminal device determines that the scheduling mode is configuration scheduling, and retransmits the LTM random access-free handover completion information to the second network device through configuration scheduling.

[0321] Optionally, during the operation of the retransmission timer, if the terminal device receives dynamic scheduling information sent by the second network device, it can determine that the scheduling mode is dynamic scheduling according to the dynamic scheduling information, and retransmit the LTM random access-free switching completion information through dynamic scheduling.

[0322] Optionally, the second network device sends dynamic scheduling information, where the dynamic scheduling information includes uplink scheduling and / or downlink scheduling. The terminal device further processes according to the dynamic scheduling information.

[0323] Optionally, if the dynamic scheduling information received by the terminal device is downlink scheduling, it is deemed that the LTM switching is completed.

[0324] Optionally, if the dynamic scheduling information received by the terminal device is downlink scheduling, and the terminal device has initially sent LTM random access-free switching completion information, it is deemed that the LTM switching is completed.

[0325] Optionally, the downlink scheduling is a new sending scheduling.

[0326] Optionally, the downlink scheduling and the initial transmission of the first uplink data use the same HARQ process or a default HARQ process.

[0327] Optionally, the terminal device notifies the upper layer LTM that the switching is completed.

[0328] Optionally, if the scheduling information is uplink scheduling and the terminal device has initially sent LTM-free random access handover completion information, then:

[0329] When an uplink scheduling is received and the previous transmission was performed using configuration scheduling Type 1 or Type 2, if the previous transmission was an LTM-free random access handover completion message (including a radio resource control reconfiguration completion message and / or the first uplink data), the NDI is not flipped and it is considered as a retransmission scheduling; and / or, if the previous transmission did not include a radio resource control reconfiguration completion message or the first uplink data, the NDI is flipped and it is considered as an LTM handover completion;

[0330] And / or, when an uplink schedule is received and the previous transmission was performed using the configured schedule Type 1 or Type 2, if the retransmission timer is still running, the NDI is not flipped and it is considered as a retransmission schedule; and / or, if the retransmission timer is not running, the NDI is flipped and it is considered as the LTM switching is completed.

[0331] Optionally, the terminal device retransmits LTM random access-free switching completion information based on dynamic scheduling.

[0332] Optionally, the second network device receives LTM random access-free handover completion information.

[0333] Optionally, the second network device sends confirmation information and / or a new sending schedule based on the LTM-free random access handover completion information.

[0334] This embodiment uses the above-mentioned scheme to specifically receive the LTM random access-free switching completion information retransmitted by the terminal device based on the scheduling method through the network device, providing an information retransmission mechanism applicable to the LTM switching process, which can improve the reliability of the LTM random access-free switching completion information transmission, thereby reducing LTM switching failures and / or reducing service interruption delays.

[0335] Seventh embodiment

[0336] In an embodiment of the present application, a method is provided for a terminal device to retransmit LTM random access-free switching completion information based on configuration scheduling.

[0337] Optionally, the first network device sends at least one LTM candidate cell pre-configuration information to the terminal device through RRC reconfiguration signaling.

[0338] Optionally, the terminal device receives at least one LTM candidate cell pre-configuration information and stores it locally. Optionally, the pre-configuration information is reconfigured via RRC.

[0339] Optionally, the preconfiguration information is sent by the second network device to the first network device.

[0340] Optionally, the pre-configuration information includes candidate cell configuration information and / or a retransmission timer.

[0341] Optionally, the candidate cell configuration information further includes at least one of: early uplink synchronization configuration, configuration scheduling configuration, candidate cell complete configuration indication, layer 1 measurement configuration, and new terminal device radio temporary identification.

[0342] Optionally, the layer 1 measurement configuration includes LTM channel state information resource configuration and / or LTM channel state information reporting configuration.

[0343] Optionally, the configuration scheduling configuration is also associated with beam information.

[0344] Optionally, the configuration scheduling configuration includes configuring scheduling type 1.

[0345] Optionally, the new terminal device wireless temporary identifier includes but is not limited to at least one of C-RNTI, CS-RNTI and cg-LTM-CS-RNTI.

[0346] Optionally, the terminal device selects or determines a scheduling method based on the pre-configuration information, and retransmits the LTM random access-free switching completion information based on the scheduling method.

[0347] Optionally, the terminal device sends an RRC reconfiguration completion to the first network device, and reports a layer 1 measurement report when at least one target candidate cell meets the layer 1 measurement reporting requirements.

[0348] Optionally, the first network device determines the candidate cell that needs to perform early uplink synchronization based on the layer 1 measurement report and sends PDCCH-order through downlink control information to trigger the terminal device to initiate random access to the target cell to obtain the TA value of the target cell in advance.

[0349] Optionally, the downlink control information carries a candidate cell configuration index.

[0350] Optionally, after receiving the random access preamble sent by the terminal device, the target cell calculates the TA value and sends it to the first network device.

[0351] Optionally, the first network device receives the TA value provided by the second network device and determines the cell on which to perform LTM switching, and sends an LTM switching command carrying the TA value of the corresponding candidate cell to the terminal device.

[0352] Optionally, the LTM switching command also carries beam indication information and / or candidate cell identifier.

[0353] Optionally, the terminal device performs random access-free switching to the second network device based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0354] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0355] Optionally, the configuration scheduling retransmission timer may also use cg-RetransmissionTimer or cg-SDT-RetransmissionTimer.

[0356] Optionally, the LTM handover retransmission timer may be cg-LTM-RetraqnsmissionTimer, which is used for random access-free LTM handover retransmission, and is not specifically limited in the embodiments of the present application.

[0357] Optionally, the terminal device sends LTM random access-free switching completion information according to the determined configuration scheduling configuration.

[0358] Optionally, the retransmission timer may be started before or after sending the LTM-free random access handover completion information.

[0359] Optionally, when the retransmission timer times out, the terminal device retransmits the LTM random access handover completion information by configuring scheduling, optionally including: sending the scheduling information and / or HARQ information to the HARQ entity and further performing retransmission processing.

[0360] Optionally, the terminal device retransmits the first uplink data through the default HARQ process.

[0361] Optionally, the retransmission will not be considered as a new data indication toggle.

[0362] Optionally, the HARQ information includes NDI and / or HARQ process identifier.

[0363] Optionally, the new data indicator is used to indicate whether the data being sent is a new transmission or a retransmission of previously sent data. Optionally, the new data indicator is used to determine whether the data being sent is a new transmission by flipping, and to determine whether the data being sent is a retransmission by not flipping. For example, if the NDI indicator of the previously sent data was 0, if the data being sent is determined to be a retransmission, the NDI indicator for the currently sent data remains 0.

[0364] Optionally, the second network device responds to the LTM random access-free handover completion information sent and / or retransmitted by the terminal device, sends a confirmation message and / or a new transmission schedule and regards the LTM handover as completed. Upon receiving the new transmission schedule of the second network device, the terminal device regards the candidate cell as the serving cell.

[0365] Optionally, the terminal device releases the configuration scheduling after completing the LTM switching, and / or the terminal device stops the retransmission timer.

[0366] This embodiment adopts the above-mentioned scheme, specifically through the terminal device selecting or determining the scheduling mode based on the pre-configuration information sent by the first network device, including the terminal device determining that the scheduling mode is configuration scheduling in response to the retransmission timer timing out, and retransmitting the LTM random access-free switching completion information based on the configuration scheduling, ensuring that the second network device receives the LTM random access-free switching completion information, which can improve the reliability of the LTM random access-free switching completion information transmission, and / or reduce LTM switching failures, and / or reduce service interruption delay, and / or, by introducing a retransmission timer suitable for LTM switching, clarify the uplink data transmission retransmission mechanism.

[0367] Eighth embodiment

[0368] In an embodiment of the present application, a method is provided for a terminal device to retransmit LTM random access-free switching completion information based on dynamic scheduling.

[0369] Optionally, the first network device sends at least one LTM candidate cell pre-configuration information to the terminal device through RRC reconfiguration signaling.

[0370] Optionally, the terminal device receives at least one LTM candidate cell pre-configuration information and stores it locally. Optionally, the pre-configuration information is reconfigured via RRC.

[0371] Optionally, the preconfiguration information is sent by the second network device to the first network device.

[0372] Optionally, the pre-configuration information includes candidate cell configuration information and / or a retransmission timer.

[0373] Optionally, the terminal device selects or determines a scheduling method based on the pre-configuration information, and retransmits the LTM random access-free switching completion information based on the scheduling method.

[0374] Optionally, the terminal device sends an RRC reconfiguration completion to the first network device, and reports a layer 1 measurement report when at least one target candidate cell meets the layer 1 measurement reporting requirements.

[0375] Optionally, the first network device determines the candidate cell that needs to perform early uplink synchronization based on the layer 1 measurement report and sends PDCCH-order through downlink control information to trigger the terminal device to initiate random access to the second network device to obtain the target cell TA value in advance.

[0376] Optionally, after receiving the random access preamble sent by the terminal device, the second network device calculates the TA value and sends it to the first network device.

[0377] Optionally, the first network device receives the TA value provided by the second network device and determines the cell on which to perform LTM switching, and sends an LTM switching command carrying the TA value of the corresponding candidate cell to the terminal device.

[0378] Optionally, the terminal device performs random access-free switching to the target cell based on the TA value carried in the LTM switching command, determines the configuration scheduling configuration based on the beam indication information, and starts the retransmission timer.

[0379] Optionally, the second network device sends dynamic scheduling information, where the dynamic scheduling information includes uplink scheduling and / or downlink scheduling. The terminal device further processes according to the dynamic scheduling information.

[0380] Optionally, if the scheduling information is downlink scheduling and the terminal device has initially sent LTM random access-free switching completion information, it is deemed that the LTM switching is completed.

[0381] Optionally, the downlink scheduling is a new sending scheduling.

[0382] Optionally, the downlink scheduling and the initial transmission of the first uplink data use the same HARQ process or a default HARQ process.

[0383] Optionally, the terminal device notifies the upper layer LTM that the switching is completed.

[0384] Optionally, if the scheduling information is uplink scheduling and the terminal device has initially sent LTM-free random access handover completion information, then:

[0385] When an uplink scheduling is received and the previous transmission was performed using configuration scheduling Type 1 or Type 2, if the previous transmission was LTM-free random access handover completion information (including radio resource control reconfiguration completion information and / or the first uplink data), the NDI is not flipped and it is regarded as retransmission scheduling; and / or, if the previous transmission does not include radio resource control reconfiguration completion information or the first uplink data, the NDI is flipped and it is regarded as LTM handover completion; and / or,

[0386] When an uplink schedule is received and the previous schedule was Type 1 or Type 2, if the retransmission timer is still running, the NDI is not flipped and it is considered as a retransmission schedule; and / or, if the retransmission timer is not running, the NDI is flipped and it is considered as LTM switching completion.

[0387] Optionally, the terminal device retransmits LTM random access-free switching completion information based on dynamic scheduling.

[0388] Optionally, the second network device receives LTM random access-free handover completion information.

[0389] Optionally, the terminal device sends new uplink data and / or receives new downlink data based on dynamic scheduling.

[0390] This embodiment uses the above-mentioned scheme, specifically through the terminal device selecting or determining the scheduling mode based on the pre-configuration information sent by the first network device, including the terminal device determining that the scheduling mode is dynamic scheduling according to the dynamic scheduling information sent by the second network device, and retransmitting the LTM random access-free switching completion information based on dynamic scheduling to ensure that the second network device receives the LTM random access-free switching completion information, which can improve the reliability of the LTM random access-free switching completion information transmission, and / or reduce LTM switching failures, and / or reduce service interruption delay, and / or provide a method for performing LTM random access-free switching completion information retransmission through dynamic scheduling, clarify the processing mechanism under different situations, and / or make the scheduling mode more flexible.

[0391] Please refer to Figure 11, which is a schematic diagram of the structure of a retransmission 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 retransmission device shown in Figure 11 can be used to perform some or all of the functions of the method embodiment described in the above embodiment. As shown in Figure 11, the retransmission device 110 includes:

[0392] The retransmission module 111 is configured to retransmit the LTM random access-free handover completion information based on a scheduling method.

[0393] Optionally, the device further comprises at least one of the following:

[0394] Determining a configuration scheduling configuration based on pre-configured information;

[0395] Start the retransmission timer;

[0396] Send LTM-free random access handover completion information via the default automatic hybrid repeat request;

[0397] Select or confirm the scheduling method.

[0398] Optionally, selecting or determining a scheduling method includes:

[0399] In response to a retransmission timer expiring, determining that the scheduling mode is configuration scheduling; and / or,

[0400] In response to receiving the dynamic scheduling information, determining the scheduling mode as dynamic scheduling according to the dynamic scheduling information.

[0401] Optionally, the scheduling method includes configuration scheduling and / or dynamic scheduling.

[0402] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0403] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0404] Optionally, the dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

[0405] Optionally, determining that the scheduling mode is dynamic scheduling according to the dynamic scheduling information includes:

[0406] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM-free random access handover completion information, then determining that the scheduling mode is dynamic scheduling; and / or,

[0407] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in a running state, then the scheduling mode is determined to be dynamic scheduling.

[0408] Optionally, the device further comprises:

[0409] If the dynamic scheduling information is downlink scheduling, new uplink transmission and / or downlink reception are indicated according to the downlink scheduling, and / or a retransmission timer is stopped.

[0410] Optionally, the device further comprises at least one of the following:

[0411] The network device sends pre-configuration information;

[0412] Retransmit the LTM-free random access handover completion information through the default automatic hybrid repeat request;

[0413] Retransmission is determined by indicating that the new data does not flip;

[0414] The network device receives LTM random access-free switching completion information.

[0415] The retransmission 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.

[0416] Please refer to Figure 12, which is a second structural diagram of a retransmission 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 retransmission device 120 includes:

[0417] The receiving module 121 is configured to receive LTM random access-free handover completion information retransmitted by the terminal device based on a scheduling manner.

[0418] Optionally, the device further comprises at least one of the following:

[0419] Sending pre-configuration information so that the terminal device selects or determines a scheduling mode based on the pre-configuration information, and retransmits the LTM random access-free handover completion information based on the scheduling mode;

[0420] Send LTM switch command;

[0421] Sending dynamic scheduling information so that the terminal device selects or determines a scheduling mode based on the dynamic scheduling information, and retransmits LTM random access-free handover completion information based on the scheduling mode;

[0422] Send confirmation information and / or new transmission schedule based on the LTM-free random access handover completion information.

[0423] Optionally, the pre-configuration information includes a retransmission timer.

[0424] Optionally, the LTM switching command is used to instruct the terminal device to perform LTM random access-free and / or start a retransmission timer.

[0425] Optionally, the dynamic scheduling information is also used to indicate new uplink transmission and / or downlink transmission of the terminal device.

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

[0427] The terminal device determines the configuration scheduling configuration based on the pre-configured information;

[0428] The terminal device starts a retransmission timer;

[0429] The terminal device sends LTM-free random access handover completion information through the default automatic hybrid repeat request;

[0430] The terminal device selects or determines the scheduling method.

[0431] Optionally, the terminal device selects or determines a scheduling mode, including:

[0432] In response to the retransmission timer expiring, the terminal device determines that the scheduling mode is configuration scheduling; and / or,

[0433] In response to receiving the dynamic scheduling information, the terminal device determines that the scheduling mode is dynamic scheduling according to the dynamic scheduling information.

[0434] Optionally, the scheduling method includes configuration scheduling and / or dynamic scheduling.

[0435] Optionally, the LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data.

[0436] Optionally, the retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer.

[0437] Optionally, the dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

[0438] Optionally, the terminal device determines that the scheduling mode is dynamic scheduling according to the dynamic scheduling information, including:

[0439] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM-free random access switching completion information, the terminal device determines that the scheduling mode is dynamic scheduling; and / or,

[0440] If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in the running state, the terminal device determines that the scheduling mode is dynamic scheduling.

[0441] Optionally, the device further comprises:

[0442] If the dynamic scheduling information is downlink scheduling, the terminal device indicates new uplink transmission and / or downlink reception according to the downlink scheduling, and / or the terminal device stops the retransmission timer.

[0443] Optionally, the device further comprises:

[0444] The terminal device retransmits the LTM-free random access handover completion information through a default automatic hybrid repeat request; and / or,

[0445] The terminal device confirms retransmission by indicating no flipping of the new data.

[0446] The retransmission 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.

[0447] Refer to Figure 13, which is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 13, 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.

[0448] 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.

[0449] 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 to enable the communication device 140 to execute the method corresponding to the terminal device or network device described in the above method embodiment.

[0450] Optionally, the communication device 140 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments.

[0451] 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 performs the method described in the above method embodiment.

[0452] Optionally, data may also be stored in the memory 142. The processor 141 and the memory 142 may be provided separately or integrated together.

[0453] 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.

[0454] 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 the processor 141 determines the scheduling method based on the pre-configuration information, and retransmits the LTM random access-free switching completion information based on the scheduling method.

[0455] 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.

[0456] 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 may receive LTM random access-free handover completion information retransmitted by the terminal device in a scheduling manner.

[0457] 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.

[0458] 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.

[0459] 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.

[0460] 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 13. The communication device may be an independent device or may be part of a larger device.

[0461] An embodiment of the present application further provides a communication system, including: a terminal device as in any of the above embodiments; and a network device as in any of the above embodiments.

[0462] An embodiment of the present application also provides a communication device, including a memory and a processor, wherein a retransmission program is stored in the memory, and when the retransmission program is executed by the processor, the steps of the retransmission method in any of the above embodiments are implemented.

[0463] 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.

[0464] An embodiment of the present application also provides a storage medium, on which a retransmission program is stored. When the retransmission program is executed by a processor, the steps of the retransmission method in any of the above embodiments are implemented.

[0465] 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 retransmission 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.

[0466] 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.

[0467] 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.

[0468] 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.

[0469] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0470] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0471] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0472] 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.

[0473] 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.

[0474] 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.

[0475] 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.

[0476] 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)).

[0477] 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 retransmission method, wherein: Includes steps: S2: Retransmit the LTM random access-free handover completion information based on the scheduling method.

2. The method of claim 1, wherein: The method further comprises at least one of the following: Determining a configuration scheduling configuration based on the pre-configured information; Start the retransmission timer; Send LTM-free random access handover completion information via default automatic hybrid repeat request; Select or confirm the scheduling method.

3. The method of claim 2, wherein: The selecting or determining the scheduling method includes: In response to the retransmission timer expiring, determining the scheduling mode to be configuration scheduling; and / or, In response to receiving the dynamic scheduling information, determining the scheduling mode as dynamic scheduling according to the dynamic scheduling information.

4. The method of claim 3, wherein: Also includes at least one of the following: The scheduling method includes configuration scheduling and / or dynamic scheduling; The LTM random access-free handover completion information includes radio resource control reconfiguration completion information and / or the first uplink data; The retransmission timer includes a configuration scheduling retransmission timer and / or an LTM switching retransmission timer; The dynamic scheduling information includes uplink scheduling and / or downlink scheduling.

5. The method of claim 4, wherein: Determining the scheduling mode as dynamic scheduling according to the dynamic scheduling information includes: If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the previous sending content is LTM random access free switching completion information, then determining that the scheduling mode is dynamic scheduling; and / or, If the dynamic scheduling information is uplink scheduling, and the previous sending mode is configuration scheduling, and the retransmission timer is in a running state, then it is determined that the scheduling mode is dynamic scheduling.

6. The method of claim 4, wherein: The method further comprises: If the dynamic scheduling information is downlink scheduling, new uplink transmission and / or downlink reception are indicated according to the downlink scheduling, and / or a retransmission timer is stopped.

7. The method according to any one of claims 2 to 6, wherein: The method further comprises at least one of the following: The network device sends pre-configuration information; Retransmit the LTM-free random access handover completion information by default automatic hybrid repeat request; Retransmission is determined by indicating that new data does not flip; The network device receives LTM random access-free switching completion information.

8. A retransmission method, wherein: Includes steps: S3: receiving the LTM random access-free switching completion information retransmitted by the terminal device based on the scheduling method.

9. The method of claim 8, wherein: The method further comprises at least one of the following: Sending pre-configuration information so that the terminal device selects or determines a scheduling mode based on the pre-configuration information, and retransmits LTM random access-free switching completion information based on the scheduling mode; Send LTM switch command; Sending dynamic scheduling information so that the terminal device selects or determines a scheduling mode based on the dynamic scheduling information, and retransmits LTM random access-free switching completion information based on the scheduling mode; Send confirmation information and / or new transmission schedule based on LTM random access free handover completion information.

10. The method of claim 9, wherein: The method further comprises at least one of the following: The pre-configured information includes a retransmission timer; The LTM switching command is used to instruct the terminal device to perform LTM random access-free and / or start a retransmission timer; The dynamic scheduling information is also used to indicate new uplink transmission and / or downlink transmission of the terminal device.

11. A communication device, wherein: include: A memory, a processor, and a retransmission program stored in the memory and executable on the processor, wherein when the retransmission program is executed by the processor, the steps of the retransmission method according to any one of claims 1 to 10 are implemented.

12. A storage medium, wherein: The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the retransmission method according to any one of claims 1 to 10 are implemented.

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