WO2021037148A1

WO2021037148A1 - Data transmission method and terminal

Info

Publication number: WO2021037148A1
Application number: PCT/CN2020/111782
Authority: WO
Inventors: 莫毅韬; 吴昱民
Original assignee: 维沃移动通信有限公司
Priority date: 2019-08-27
Filing date: 2020-08-27
Publication date: 2021-03-04
Also published as: CN111836280A; CN111836280B

Abstract

The present disclosure provides a data transmission method and a terminal, the data transmission method comprising: when an RACH process of a first SDT of a terminal is in progress, and the terminal has new data to be transmitted, selecting a random access resource; and using the selected random access resource to transmit the new data to be transmitted.

Description

Data transmission method and terminal

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201910797081.5 filed in China on August 27, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular to a data transmission method and terminal.

Background technique

At present, according to the terminal’s Small Data Transmission (SDT) mechanism, if the terminal has new uplink data during the SDT’s random access (Random Access Channel, RACH) process, the terminal will only have to wait until it is currently in progress. After the RACH process of the SDT is completed, the RACH process of the SDT can be performed again or the radio resource control (Radio Resource Control, RRC) connection establishment can be performed to transmit new uplink data. However, the user uplink data of the SDT is usually small and bursty. If the transmission mode in the related technology is followed, it will cause a long service transmission delay and affect the smooth progress of the communication process.

Summary of the invention

The embodiments of the present disclosure provide a data transmission method and terminal to solve the problem of large service transmission delay caused by the transmission mode of SDT in related technologies.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In the first aspect, embodiments of the present disclosure provide a data transmission method, including:

When the RACH process of the first SDT of the terminal is in progress, and the terminal has new data to be transmitted, select random access resources;

The selected random access resource is used to transmit the new data to be transmitted.

In a second aspect, embodiments of the present disclosure provide a terminal, including:

The control module is configured to select random access resources when the RACH process of the first SDT of the terminal is in progress and the terminal has new data to be transmitted;

The transmission module is configured to use the selected random access resource to transmit the new data to be transmitted.

In a third aspect, embodiments of the present disclosure provide a terminal, including a memory, a processor, and a computer program stored on the memory and capable of being run on the processor, wherein the computer program is executed by the processor When realizing the steps of the above data transmission method.

In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium on which a computer program is stored, wherein the computer program implements the steps of the above data transmission method when the computer program is executed by a processor.

In the embodiment of the present disclosure, when the RACH process of the first SDT of the terminal is in progress and the terminal has new data to be transmitted, the random access resource can be selected again, and the selected random access resource can be used to The new data to be transmitted is transmitted. Compared with the SDT transmission mode in the related art, the embodiment of the present disclosure can enable the terminal to select more appropriate random access resources for data transmission under the condition that the data transmission demand changes during the RACH process of the SDT, thereby helping to reduce Service transmission delays, reduce signaling overhead, and improve resource utilization.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is a flowchart of a data transmission method according to an embodiment of the disclosure;

FIG. 2 is one of the schematic structural diagrams of the terminal according to the embodiment of the disclosure;

FIG. 3 is the second structural diagram of a terminal according to an embodiment of the disclosure.

detailed description

In the embodiments of the present disclosure, the wireless communication system involved includes a terminal and a network device. Among them, the terminal can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal can be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA). ), Mobile Internet Device (MID), Wearable Device (Wearable Device), or in-vehicle device and other terminal-side devices. It should be noted that the specific types of terminals are not limited in the embodiments of the present disclosure. The network equipment may be a base station or a core network, where the above-mentioned base station may be a base station of 5G and later versions (for example: gNB, 5G NR NB, etc.), or a base station in other communication systems (for example: eNB, WLAN access point, or Other access points, etc.), the base station can be called Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set, BSS), Extended Service Set (ESS), Node B, Evolved Node B (eNB), Home Node B, Home Evolved Node B, WLAN Access Point, WiFi Node, or any other in the field Appropriate terms, as long as they achieve the same technical effect, are not limited to specific technical vocabulary.

Optionally, the SDT in the embodiment of the present disclosure may also be referred to as Early Data Transmission (EDT). For the EDT technology, it is mainly applied to the uplink transmission of the terminal. The terminal can complete the transmission of the uplink data in the idle state (Idle) or the inactive state (Inactive) without performing the RRC state transition.

Please refer to FIG. 1. FIG. 1 is a flowchart of a data transmission method provided by an embodiment of the present disclosure. The method is applied to a terminal. As shown in FIG. 1, the method includes the following steps:

Step 101: When the RACH process of the first SDT of the terminal is in progress, and the terminal has new data to be transmitted, select random access resources.

In this embodiment, the above-mentioned RACH process may be a 2-step (2-step) RACH process or a 4-step (4-step) RACH process. The foregoing selection of random access resources may be that the terminal re-selects random access resources in the corresponding RACH process. In order to implement the random access resource selection in step 101, the terminal needs to have corresponding system configuration support.

It should be noted that the above 4-step random access process can be understood as: triggering SDT in the 4-step random access process, and the above 2-step random access process can be understood as: triggering SDT in the 2-step random access process .

Optionally, in the embodiments of the present disclosure, the foregoing 4-step random access process may include CP-SDT 4-step RACH (for example, the third message (ie, Msg3) of the 4-step random access process is carried over the radio by signaling. Send data) and UP-SDT 4-step RACH (for example, send data in the third message of the 4-step random access process through the data radio bearer); the above-mentioned SDT 2-step random access process can include CP-SDT2-step RACH (E.g., message A (i.e. MsgA) sends data in the 2-step random access process through the signaling radio bearer) and UP-SDT 2-step RACH (e.g., message A in the 2-step random access process through the data radio bearer) send data).

Optionally, the foregoing random access resource may be at least one of the following: physical random access channel (PRACH) resource, serving cell (Serving cell), uplink carrier (UL carrier), uplink bandwidth part (UL BWP), synchronization signal Block (SSB), channel state information reference signal (CSI-RS), preamble, preamble group, random access opportunity (RACH occasion), physical uplink shared channel for 2-step random access process Configuration (PUSCH configuration), physical uplink shared channel opportunity (PUSCH occasion, PO) of the 2-step random access process, PUSCH demodulation reference signal (DMRS), PUSCH demodulation reference signal port (DMRS-port), etc.

Step 102: Use the selected random access resource to transmit new data to be transmitted.

In the data transmission method of the embodiment of the present disclosure, when the RACH process of the first SDT of the terminal is in progress, and the terminal has new data to be transmitted, the random access resource can be selected again, and the selected random access can be used. Resource, to transmit the new data to be transmitted. Compared with the SDT transmission mode in the related art, the embodiment of the present disclosure can enable the terminal to select more appropriate random access resources for data transmission under the condition that the data transmission demand changes during the RACH process of the SDT, thereby helping to reduce Service transmission delays, reduce signaling overhead, and improve resource utilization.

In the embodiment of the present disclosure, the situation that the above-mentioned terminal has new data to be transmitted may be that the higher layer of the terminal triggers a new SDT process, or the application layer of the terminal generates new data to be transmitted, as described below respectively.

Situation One

In this case, when a RACH process for SDT of the terminal is in progress, the upper layer of the terminal triggers a new SDT process. The above step 101 may include:

During the RACH process of the first SDT of the terminal, if the upper layer of the terminal triggers the second SDT, the RACH process of the first SDT is stopped, the RACH process of the second SDT is triggered, and the random access resource selection is performed.

Wherein, when the RACH process of the first SDT of the above-mentioned terminal is in progress, it can be referred to as the RACH process of the first SDT is in progress, that is, it corresponds to the entire stage of the RACH process.

Further, when the RACH process of the first SDT of the above-mentioned terminal is performed, the RACH process of the first SDT of the terminal is performed and the random access request message is not sent, that is, the corresponding is the random access in the RACH process. The time period during which the incoming request message has not been sent. The time period during which the random access request message has not been sent may include: the time period for initializing the RACH process configuration, the resource selection time period for the random access request message, the time period for preparing the random access request message to be sent, and so on.

Optionally, in the embodiments of the present disclosure, the above random access request message may be any one of the following: the first message in the 4-step RACH (ie Msg1), the third message in the 4-step RACH ( Namely Msg3), 2-step RACH message A (namely MsgA).

In this case, the above step 102 may include: using the selected random access resource to perform the RACH process of the second SDT to transmit the new data to be transmitted.

For example, the upper layer of UE1 triggers an SDT process such as the SDT1 process, and then the MAC layer of UE1 performs the RACH process of SDT1. If, while the RACH process of SDT1 is in progress, the higher layer of UE1 triggers another SDT process such as the SDT2 process, then the MAC layer of UE1 can stop the current RACH process (that is, the RACH process of SDT1), and trigger or initialize a new RACH process ( That is, the RACH process of SDT2), and select a new random access resource to use the selected random access resource to perform the RACH process of SDT2.

Or, if the RACH process of SDT1 is in progress and the random access request message has not been sent, the higher layer of UE1 triggers another SDT process such as the SDT2 process, then the MAC layer of UE1 can stop the current RACH process (Ie the 2-step RACH process of SDT1), trigger or initialize a new RACH process (ie, the 2-step RACH process of SDT2), and select a new random access resource to use the selected random access resource to perform the RACH process of SDT2 .

Situation two

In this second case, when a RACH process for SDT of the terminal is in progress, the terminal generates new data to be transmitted. The above step 101 may include:

When the RACH process of the first SDT of the terminal is in progress, and the terminal has new data to be transmitted, and when the first condition is met, random access resource selection is performed.

Wherein, the first condition may include at least one of the following content:

The payload size included in the potential second random access request message is different from the payload size included in the first random access request message;

The payload size included in the potential second random access request message is less than a preset threshold;

A MAC protocol data unit (Protocol Data Unit, PDU) already exists in the random access buffer area.

Wherein, the first random access request message is a random access request message for the terminal to try to perform the RACH process of the first SDT for the first time; the second random access request message is a RACH for the terminal currently trying to perform the first SDT. Random access request message for the process.

The payload size included in the above potential second random access request message can be the available data to be transmitted plus the MAC subheader overhead and the possibly required MAC CE size, plus the total size of the MAC PDU in the random access buffer . The foregoing preset threshold value may be preset by the terminal or configured by the network device, which is not limited in this embodiment.

Further, the foregoing selection of random access resources may include: selection of random access resources according to at least one of the following;

The size of the payload included in the potential second random access request message;

Current transmission path loss;

The maximum transmission power of the terminal.

In this way, it can be ensured that a suitable random access resource is selected, so that the data is transmitted smoothly.

In this second case, the above step 102 may include: firstly, rebuild the MAC PDU in the second random access request message, where the reconstructed MAC PDU includes the new data to be transmitted; then, use the selection To transmit the second random access request message to transmit the new data to be transmitted. Among them, the above reconstruction can be understood as update, which has the same meaning as update.

Optionally, after reconstructing the MAC PDU in the second random access request message, the terminal may also save the reconstructed MAC PDU in a random access buffer for subsequent use.

For example, the upper layer of UE2 triggers an SDT process such as SDT3 process, and then the MAC layer of UE2 performs an SDT3 RACH process, such as a 2-step RACH process or a 4-step RACH process. In the RACH process of SDT3, UE2 generates new data to be transmitted, and the higher layer of UE2 decides to adopt SDT, and delivers the new data to be transmitted to the lower layer in the form of data units.

Taking the 4-step RACH process as an example, if UE2 sends Msg3 during the resource selection process of the current RACH attempt, but does not receive the corresponding response message (RAR) from the network device, and the RACH process is not completed, UE2 can try the next time RACH process, retransmit Msg3. If the potential Msg3 size (Msg3size, which can be called the Msg3 payload size, the available uplink data to be transmitted plus the MAC header overhead and the MAC CE that may be required, plus the total size of the MAC PDU in the Msg3 buffer) Compared with the Msg3 size of the first RACH process, and the potential Msg3 size is smaller than the threshold configured by the network device, and there is already a MAC PDU in the Msg3 buffer area, UE2 can use the potential Msg3 size, Re-select the random access resources, and use the re-selected random access resources to perform the RACH process, and according to the network equipment instructions for the transport block size (Transport Block Size, TBS) or TBS subset (or RAR TBS indicated in the message), reconstruct (also referred to as updating) the MAC PDU in Msg3, save the reconstructed MAC PDU in the Msg3 buffer area, and prepare for subsequent transmission of Msg3 to realize the new transmission Transmission of data. Otherwise, UE2 still selects the random access resource used during the first RACH transmission of Msg3 to perform the RACH process.

Take the 2-step RACH process as an example. If UE2 sends MsgA during the resource selection process of the current RACH attempt, but does not receive the corresponding response message (MsgB) from the network device, and the RACH process is not completed, UE2 can try the next time RACH process, retransmit MsgA. If the potential MsgA payload size (MsgA payload size) can be called the MsgA payload size, you can obtain the uplink data to be transmitted plus the MAC header overhead and the MAC CE that may be required, plus the total number of MAC PDUs in the MsgA buffer area. Size) Compared with the first RACH process, the MsgA size is different, and the potential MsgA payload size is less than the threshold configured by the network device, and there is already a MAC PDU in the MsgA buffer, UE2 can use the potential The MsgA payload size is re-selected for random access resources, and the TBS or TBS subset (or TBS or TBS subset in the MsgA PUSCH configuration) indicated by the network device for SDT can be reconstructed (ie updated). In the MAC PDU, save the reconstructed MAC PDU in the MsgA buffer area, and use the reselected random access resources to perform the RACH process to realize the transmission of new data to be transmitted. Otherwise, UE2 still selects the random access resource used in the first RACH transmission of MsgA to perform the RACH process.

The above embodiments describe the data transmission method of the present disclosure, and the terminal corresponding to the data transmission method of the present disclosure will be described below with reference to the embodiments and drawings.

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure. As shown in FIG. 2, the terminal 20 includes:

The control module 21 is configured to select random access resources when the RACH process of the first SDT of the terminal is in progress and the terminal has new data to be transmitted;

The transmission module 22 is configured to use the selected random access resource to transmit the new data to be transmitted.

Optionally, the control module 21 is specifically configured to:

When the RACH process of the first SDT of the terminal is in progress, if the higher layer of the terminal triggers the second SDT, stop the RACH process of the first SDT, trigger the RACH process of the second SDT, and Carry out the selection of random access resources.

Optionally, when the RACH process of the first SDT of the terminal is performed, specifically:

The RACH process of the first SDT of the terminal is performed before the random access request message is sent.

Optionally, the transmission module 22 may be used for:

Using the selected random access resource, perform the RACH process of the second SDT.

Optionally, the control module 21 may be used for:

When the first condition is met, select random access resources;

Wherein, the first condition includes at least one of the following:

The MAC PDU of the media access control protocol data unit already exists in the random access buffer area;

Wherein, the first random access request message is a random access request message for the terminal that attempts to perform the RACH process of the first SDT for the first time; the second random access request message is a current attempt of the terminal A random access request message for performing the RACH process of the first SDT.

Optionally, the control module 21 may be used for:

Select random access resources according to at least one of the following;

Current transmission path loss;

The maximum transmission power of the terminal.

Optionally, the transmission module 22 includes:

A reconstruction unit, configured to reconstruct the MAC PDU in the second random access request message, where the reconstructed MAC PDU includes the new data to be transmitted;

The transmission unit is configured to use the selected random access resource to transmit the second random access request message.

Optionally, the terminal 20 further includes:

The storage module is configured to store the reconstructed MAC PDU in the random access buffer area.

In addition, the embodiments of the present disclosure also provide a terminal, including a processor, a memory, and a computer program that is stored on the memory and can run on the processor. When the computer program is executed by the processor, Each process of the foregoing data transmission method embodiment is implemented, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.

Please refer to FIG. 3, which is a schematic diagram of the hardware structure of a terminal for implementing various embodiments of the present disclosure. As shown in FIG. 3, the terminal 300 includes but is not limited to: a radio frequency unit 301, a network module 302, an audio output unit 303, and an input The unit 304, the sensor 305, the display unit 306, the user input unit 307, the interface unit 308, the memory 309, the processor 310, and the power supply 311 and other components. Those skilled in the art can understand that the terminal structure shown in FIG. 3 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components. In the embodiments of the present disclosure, terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices, and pedometers.

The processor 310 is configured to perform random access resource selection when the terminal 300 has new data to be transmitted when the RACH inbound process of the first SDT of the terminal 300 is in progress;

The radio frequency unit 301 is configured to use the selected random access resource to transmit the new data to be transmitted.

It is understandable that the terminal 300 of the embodiment of the present disclosure can implement the various processes implemented in the method embodiment shown in FIG. 1 and achieve the same beneficial effects. To avoid repetition, details are not described herein again.

It should be understood that, in the embodiment of the present disclosure, the radio frequency unit 301 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, the downlink data from the base station is received and processed by the processor 310; in addition, Uplink data is sent to the base station. Generally, the radio frequency unit 301 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 301 can also communicate with the network and other devices through a wireless communication system.

The terminal provides users with wireless broadband Internet access through the network module 302, such as helping users to send and receive emails, browse web pages, and access streaming media.

The audio output unit 303 can convert the audio data received by the radio frequency unit 301 or the network module 302 or stored in the memory 309 into audio signals and output them as sounds. Moreover, the audio output unit 303 may also provide audio output related to a specific function performed by the terminal 300 (for example, call signal reception sound, message reception sound, etc.). The audio output unit 303 includes a speaker, a buzzer, a receiver, and the like.

The input unit 304 is used to receive audio or video signals. The input unit 304 may include a graphics processing unit (GPU) 3041 and a microphone 3042. The graphics processing unit 3041 is used to capture images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The data is processed. The processed image frame may be displayed on the display unit 306. The image frame processed by the graphics processor 3041 may be stored in the memory 309 (or other storage medium) or sent via the radio frequency unit 301 or the network module 302. The microphone 3042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to the mobile communication base station via the radio frequency unit 301 for output in the case of a telephone call mode.

The terminal 300 also includes at least one sensor 305, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 3061 according to the brightness of the ambient light. The proximity sensor can close the display panel 3061 and/or when the terminal 300 is moved to the ear. Or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal gestures (such as horizontal and vertical screen switching, related games, Magnetometer posture calibration), vibration recognition related functions (such as pedometer, percussion), etc.; sensor 305 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared Sensors, etc., will not be repeated here.

The display unit 306 is used to display information input by the user or information provided to the user. The display unit 306 may include a display panel 3061, and the display panel 3061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

The user input unit 307 may be used to receive inputted number or character information, and generate key signal input related to user settings and function control of the terminal. Specifically, the user input unit 307 includes a touch panel 3071 and other input devices 3072. The touch panel 3071, also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 3071 or near the touch panel 3071. operating). The touch panel 3071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 310, the command sent by the processor 310 is received and executed. In addition, the touch panel 3071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 3071, the user input unit 307 may also include other input devices 3072. Specifically, other input devices 3072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.

Further, the touch panel 3071 can be overlaid on the display panel 3061. When the touch panel 3071 detects a touch operation on or near it, it is transmitted to the processor 310 to determine the type of the touch event, and then the processor 310 determines the type of the touch event according to the touch. The type of event provides corresponding visual output on the display panel 3061. Although in FIG. 3, the touch panel 3071 and the display panel 3061 are used as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 3071 and the display panel 3061 can be integrated. Realize the input and output functions of the terminal, the specifics are not limited here.

The interface unit 308 is an interface for connecting an external device with the terminal 300. For example, the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc. The interface unit 308 can be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 300 or can be used to communicate between the terminal 300 and the external device. Transfer data between.

The memory 309 can be used to store software programs and various data. The memory 309 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc. In addition, the memory 309 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 310 is the control center of the terminal. It uses various interfaces and lines to connect the various parts of the entire terminal. It executes by running or executing software programs and/or modules stored in the memory 309 and calling data stored in the memory 309. Various functions of the terminal and processing data, so as to monitor the terminal as a whole. The processor 310 may include one or more processing units; preferably, the processor 310 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, and application programs. The processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 310.

The terminal 300 may also include a power source 311 (such as a battery) for supplying power to various components. Preferably, the power source 311 may be logically connected to the processor 310 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. Features.

In addition, the terminal 300 may also include some functional modules that are not shown, which will not be repeated here.

The embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, each process of the data transmission method embodiment shown in FIG. 1 can be realized. And can achieve the same technical effect, in order to avoid repetition, I will not repeat them here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disk.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present disclosure.

The embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present disclosure, without departing from the purpose of the present disclosure and the scope of protection of the claims, many forms can be made, all of which fall within the protection of the present disclosure.

Claims

A data transmission method applied to a terminal, including:

When the random access RACH process of the first small data transmission SDT of the terminal is in progress, and the terminal has new data to be transmitted, selecting random access resources;

The selected random access resource is used to transmit the new data to be transmitted.
The method according to claim 1, wherein the random access resource is performed when the random access RACH process of the first small data transmission SDT of the terminal is in progress, and the terminal has new data to be transmitted The options include:

When the RACH process of the first SDT of the terminal is in progress, if the higher layer of the terminal triggers the second SDT, stop the RACH process of the first SDT, trigger the RACH process of the second SDT, and Carry out the selection of random access resources.
The method according to claim 2, wherein, when the RACH process of the first SDT of the terminal is in progress, specifically:

The RACH process of the first SDT of the terminal is performed before the random access request message is sent.
The method according to claim 2, wherein the using the selected random access resource to transmit the new data to be transmitted comprises:

Using the selected random access resource, perform the RACH process of the second SDT.
The method according to claim 1, wherein the selection of random access resources comprises:

When the first condition is met, select random access resources;

Wherein, the first condition includes at least one of the following:

The payload size included in the potential second random access request message is different from the payload size included in the first random access request message;

The payload size included in the potential second random access request message is less than a preset threshold;

The MAC PDU of the media access control protocol data unit already exists in the random access buffer area;

Wherein, the first random access request message is a random access request message for the terminal to try to perform the RACH process of the first SDT for the first time; the second random access request message is a current attempt by the terminal A random access request message for performing the RACH process of the first SDT.
The method according to claim 5, wherein the selection of random access resources comprises:

Select random access resources according to at least one of the following;

The size of the payload included in the potential second random access request message;

Current transmission path loss;

The maximum transmission power of the terminal.
The method according to claim 5, wherein the using the selected random access resource to transmit the new data to be transmitted comprises:

Reconstruct the MAC PDU in the second random access request message, where the reconstructed MAC PDU includes the new data to be transmitted;

Using the selected random access resource to transmit the second random access request message.
The method according to claim 7, wherein, after the reconstruction of the MAC PDU in the second random access request message, the method further comprises:

The reconstructed MAC PDU is stored in the random access buffer area.
A terminal including:

The control module is configured to select random access resources when the RACH process of the first SDT of the terminal is in progress and the terminal has new data to be transmitted;

The transmission module is configured to use the selected random access resource to transmit the new data to be transmitted.
A terminal comprising a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the computer program is executed by the processor as in claims 1 to 8 Any of the steps of the data transmission method.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the data transmission method according to any one of claims 1 to 8 when the computer program is executed by a processor.