WO2022067788A1 - Data transmission method and apparatus, device, and storage medium - Google Patents

Abstract

The present application relates to the field of mobile communications. Disclosed are a data transmission method and apparatus, a device, and a storage medium. The method comprises: in the case that a terminal is in a radio resource control (RRC) inactive state, the terminal receives first resource information configured by a network device, the first resource information being used by the terminal to transmit uplink data in the RRC inactive state; and transmits the uplink data on the basis of the first resource information. There is no need to switch from an RRC inactive state to an RRC connected state to transmit uplink data, thereby simplifying the process of transmitting the uplink data by a terminal in the case that the terminal is in the RRC inactive state, and thus reducing signaling overhead.

Description

Data transmission method, device, equipment and storage medium technical field

The present application relates to the field of mobile communications, and in particular, to a data transmission method, apparatus, device, and storage medium.

Background technique

In an NR (New Radio, new air interface) system, an RRC (Radio Resource Control, radio resource control) state includes three states: an RRC connected state, an RRC idle state, and an RRC inactive state. For the terminal in the RRC inactive state, if the terminal needs to transmit data, it needs to switch from the RRC inactive state to the RRC connected state, but the switching process is cumbersome and the signaling overhead is large.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a data transmission method, apparatus, device, and storage medium, which simplify the process of transmitting uplink data when a terminal is in an RRC inactive state, thereby reducing signaling overhead. The technical solution is as follows:

According to an aspect of the present application, a data transmission method is provided, which is applied to a terminal, and the method includes:

When the terminal is in the RRC inactive state, receiving first resource information configured by a network device, where the first resource information is used for the terminal to transmit uplink data in the RRC inactive state;

The uplink data is transmitted based on the first resource information.

According to an aspect of the present application, a data transmission method is provided, applied to a network device, and the method includes:

Send first resource information to the terminal, where the first resource information is used by the terminal to transmit uplink data in the RRC inactive state, and the terminal is used to transmit uplink data based on the first resource information.

According to an aspect of the present application, there is provided a data transmission apparatus, which is applied to a terminal, and the apparatus includes:

A receiving module, configured to receive first resource information configured by a network device when the terminal is in the RRC inactive state, where the first resource information is used for the terminal to transmit uplink in the RRC inactive state data;

A transmission module, configured to transmit uplink data based on the first resource information.

According to an aspect of the present application, a data transmission apparatus is provided, which is applied to network equipment, and the apparatus includes:

A sending module, configured to send first resource information to a terminal, where the first resource information is used by the terminal to transmit uplink data in the RRC inactive state, and the terminal is used to transmit uplink data based on the first resource information .

According to one aspect of the present application, a terminal is provided, the terminal comprising: a processor; a transceiver connected to the processor; a memory for storing executable program codes of the processor; wherein the The processor is configured to load and execute the executable program code to implement the data transmission method as described in the above aspects.

According to one aspect of the present application, a network device is provided, the network device comprising: a processor; a transceiver connected to the processor; a memory for storing executable program codes of the processor; wherein, The processor is configured to load and execute the executable program code to implement the data transmission method as described in the above aspects.

According to an aspect of the present application, a computer-readable storage medium is provided, and executable program code is stored in the readable storage medium, and the executable program code is loaded and executed by the processor to implement the above-mentioned aspect the data transmission method.

The technical solutions provided by the embodiments of the present application include at least the following beneficial effects:

In the method, apparatus, device, and storage medium provided by the embodiments of the present application, if the terminal is in the RRC inactive state, the resource information allocated by the network device for transmitting uplink data in the RRC inactive state is obtained, and then the terminal transmits uplink data based on the resource information. Data, there is no need to switch from the RRC inactive state to the RRC connected state and then transmit the uplink data, which simplifies the process of transmitting the uplink data when the terminal is in the RRC inactive state, thereby reducing the signaling overhead.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application;

FIG. 2 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 3 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 4 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 5 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 6 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 7 shows a schematic structural diagram of a RAR provided by an exemplary embodiment of the present application;

FIG. 8 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application;

FIG. 9 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application;

FIG. 10 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application;

FIG. 11 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application;

FIG. 12 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application;

FIG. 13 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

It is understood that the terms "first", "second" and the like used in this application may be used herein to describe various concepts, but these concepts are not limited by these terms unless otherwise specified. These terms are only used to distinguish one concept from another.

First, briefly introduce the terms involved in the embodiments of the present application:

RRC inactive state: also known as RRC_INACTIVE state, this state is a newly introduced state in the NR system from the perspective of energy saving. If the terminal is in the RRC inactive state, the radio bearer and radio resources are released, and the connection stored in the terminal is released. The incoming context will not be released, and the terminal can quickly restore to the RRC connected state based on the access context.

The access context includes the device information of the terminal, the identity of the network device, the information of the established connection, bearer information, etc. When the terminal is in the RRC inactive state, if it needs to return to the RRC connection state, it does not need to communicate with the network device again. It is determined through negotiation that the information included in the access context can be directly switched to the RRC connected state through random access.

FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application. The communication system may include: an access network 12 and a terminal 13 .

The access network 12 includes several network devices 120 . The network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal. The base station may include various forms of macro base station, micro base station, relay station, access point and so on. In systems using different radio access technologies, the names of devices with base station functions may be different. For example, in LTE systems, they are called eNodeBs or eNBs; in 5G NR-U systems, they are called gNodeBs or gNBs. . As communication technology evolves, the description of "base station" may change. For the convenience of the embodiments of the present application, the above-mentioned apparatuses for providing the terminal 13 with a wireless communication function are collectively referred to as access network equipment.

The terminal 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to the wireless modem, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal (terminal device) and so on. For the convenience of description, the devices mentioned above are collectively referred to as terminals. The access network device 120 and the terminal 13 communicate with each other through a certain air interface technology, such as a Uu interface.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD) systems, Advanced long term evolution (LTE-A) systems, New Radio (NR) systems, evolution systems of NR systems, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication and Vehicle to Everything (V2X) system, etc. The embodiments of the present application can also be applied to these communication systems.

FIG. 2 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application. Referring to Figure 2, the method includes:

Step 201: When the terminal is in an RRC inactive state, the network device sends first resource information to the terminal.

In the embodiment of the present application, when the terminal is in the RRC inactive state, uplink data can be transmitted based on resource information allocated by the network device, and uplink data can be transmitted without the terminal switching the RRC connection state.

Wherein, the first resource information includes resource location, MCS (Modulation and Coding Scheme, modulation and coding strategy), or other information. The first resource information is used by the terminal to transmit uplink data in an RRC inactive state.

Step 202: The terminal receives the first resource information configured by the network device.

The network device sends the first resource information to the terminal, and the terminal receives the first resource information, and then determines the resource location and MCS included in the first resource information.

Step 203: The terminal transmits uplink data based on the first resource information.

The terminal transmits uplink data according to the determined resource location and MCS, etc.

In some embodiments, the process in which the terminal transmits uplink data in the embodiments of the present application is an SDT (Small Data Transmission, small data transmission) process.

An embodiment of the present application provides a method for transmitting data in an RRC inactive state. If a terminal is in an RRC inactive state, the resource information allocated by a network device for transmitting uplink data in the RRC inactive state is obtained, and then the terminal is based on the resources. For information transmission uplink data, there is no need to switch from the RRC inactive state to the RRC connected state and then transmit the uplink data, which simplifies the process of transmitting uplink data when the terminal is in the RRC inactive state, thereby reducing signaling overhead.

On the basis of the embodiment shown in FIG. 2 , FIG. 3 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application. Referring to FIG. 3, steps 201-202 are replaced by steps 303-304, and the method includes:

Step 301: The terminal sends first information to the network device.

The first information is used to instruct the network device to obtain the first resource information. If the terminal needs to send uplink data in the inactive state of RRC, by sending the first information to the network device to inform the network device that the terminal needs to send uplink data, the subsequent network device can allocate first resource information to the terminal.

In some embodiments, the terminal determines that the terminal meets the target condition, and sends the first information to the network device.

In addition, the target condition is set by the terminal, or set by the network device, or set by the operator, or set by other methods.

The target condition is used to indicate that the terminal needs to transmit uplink data when the terminal is in the RRC inactive state.

In some embodiments, the target condition includes at least one of the following:

(1) The DRB (Data Radio Bearer, user plane bearer) corresponding to the uplink data is allowed to trigger the SDT.

The uplink data is data to be transmitted by the terminal. The DRB is used to transmit user plane data. If the DRB allows triggering of the SDT, it means that the terminal can transmit uplink data in the RRC inactive state.

(2) The data volume of the uplink data is less than the preset data volume.

In the embodiment of the present application, if the terminal is in the RRC disconnected state, the amount of data to be transmitted cannot be too large, indicating that the target condition includes that the data amount of uplink data is smaller than the preset data amount.

Wherein, the preset data amount is set by the terminal, or set by the network device, or set by the operator, or set by other methods.

The target condition includes that the DRB corresponding to the uplink data is allowed to trigger SDT, or, the target condition includes that the data amount of the uplink data is less than the preset data amount, or the target condition includes that the DRB corresponding to the uplink data is allowed to trigger the SDT and the data amount of the uplink data is less than Default amount of data.

In other embodiments, the target condition includes that the cell to which the terminal currently belongs supports SDT and the data volume of uplink data is less than the preset data volume.

If the terminal needs to perform SDT, when the cell to which the terminal currently belongs supports SDT and the data volume of uplink data is less than the preset data volume, it is determined that the target condition is met.

Step 302: The network device receives the first information sent by the terminal.

When the terminal sends the first information to the network device, the network device learns that the terminal needs to perform data transmission in the RRC inactive state, and at this time, the network device allocates the second information to the terminal.

In some embodiments, the first information includes an RRC message and user data, and the network device allocates the second information to the terminal based on the RRC message and the user data.

For example, the RRC message is an RRC connection request, or other types of messages. The user data includes terminal identification, terminal capabilities or other data.

Step 303: The network device sends the allocated second information to the terminal.

Step 304: The terminal receives the second information allocated by the network device.

Wherein, the second information includes first resource information. After the network device receives the first information, it indicates that the terminal needs to perform uplink data transmission, then the network device determines the second information, sends the second information to the terminal, and the terminal receives the second information, and then obtains the first resource in the second information information.

In the method provided by this embodiment of the present application, if the terminal directly performs the process of transmitting data when the RRC is inactive, additional information overhead may be caused because the terminal does not meet the conditions and the data cannot be transmitted, so the terminal first determines that the target condition is met. When the first information is sent to inform the network device to allocate the first resource information for data transmission, the terminal can transmit data in the RRC inactive state, which improves the accuracy of the uplink data transmission when the terminal is in the RRC non-connected state. And also avoid extra signaling overhead.

In addition, on the basis of the embodiment shown in FIG. 3 , FIG. 4 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application. Referring to FIG. 4, step 301 is replaced with step 406, and the method includes:

Step 401: The terminal determines a random access preamble and second resource information for transmitting the random access preamble.

In the embodiment of the present application, the SDT process is performed based on random access. The terminal not only triggers the SDT process by sending a random access preamble to the network device, but also is the first process in the random access process. Subsequent terminals are based on random access. The access acquires first resource information for transmitting uplink data, transmits uplink data based on the first resource information, and completes the SDT process.

The random access preamble is used to instruct the terminal to perform SDT. The random access preamble is represented by preamble. If the terminal needs to transmit uplink data when the terminal is in the RRC inactive state, the terminal informs the network device that uplink data needs to be transmitted through the determined random access preamble, and then triggers the SDT process through the random access preamble.

In some embodiments, a random access preamble set is preconfigured in the terminal, and the terminal selects a random access preamble from the random access preamble set, and then determines a second random access preamble for transmitting the random access preamble. resource information, and subsequently send the random access preamble to the network device.

Wherein, the random access preamble set includes at least one random access preamble. For example, the random access preamble set includes 64 random access preambles, from which the terminal can select any random access preamble.

In addition, the terminal can determine the second resource information for sending the random access preamble, where the second resource information includes the resource position in the random access information, and the terminal sends the random access preamble at the resource position.

It should be noted that, in the embodiment of FIG. 3 , only the terminal sends the first information to the network device when the target condition is determined as an example for description. In another embodiment, if the terminal determines that the target condition is satisfied, the terminal performs random the step of entering the preamble, and then send the first information to the network device.

Step 402: The terminal sends a random access preamble to the network device based on the second resource information.

Step 403: The network device receives the random access preamble sent by the terminal.

The terminal sends the anytime access preamble to the network device based on the determined second resource information, and the network device receives the random access preamble.

Step 404: The network device sends a random access response to the terminal.

Step 405: The terminal receives the random access response sent by the network device.

The network device sends a random access response to the terminal based on the received random access preamble, where the random access response provides the terminal with information used in subsequent data transmission.

The random access response is a RAR (Random Access Response, random access response) message.

In some embodiments, the random access response includes at least one of the following:

(1) TAC (Timing Advanced Command, timing advance signaling).

In this embodiment of the present application, since a delay occurs during data transmission between the terminal and the network device, in order to avoid the delay, the network device adds a TAC to the random access response, and the terminal sets the timing advance according to the TAC , so that the terminal sends data in advance to prevent the delay from affecting the data transmission.

(2) Third information.

Wherein, the third information includes third resource information for transmitting the first information.

After receiving the random access preamble, the network device allocates third information including third resource information to the terminal, and then the terminal sends the first information based on the third resource information.

(3) TC-RNTI (Temporary Cell Radio Network Temporary Identifier, Temporary Cell Radio Network Temporary Identifier).

In the embodiment of the present application, the network device allocates a TC-RNTI to the terminal, and the subsequent terminal obtains the authentication of the network device based on the TC-RNTI, and then the network device schedules resource information through the TC-RNTI, and the terminal obtains the resources for data transmission with the network device. location, followed by data transmission.

Step 406: The terminal sends the first information based on the random access response.

In this embodiment of the present application, the terminal obtains the second information allocated by the network device by executing steps 401-406, and determines the contention conflict resolution according to the contention conflict resolution identifier included in the second information.

In other embodiments, the second information further includes an UL grant (Up Link grant, uplink grant) used to indicate the first resource information.

If the terminal obtains the UL grant from the second information, it means that the network device allows the terminal to transmit data, then the terminal determines the first resource information based on the UL grant, and then transmits uplink data based on the first resource information.

Wherein, the UL grant is used to indicate the first resource information, and the UL grant includes a resource location for transmitting uplink data, an MCS for transmitting uplink data, and the like.

In a possible implementation manner, the UL grant is carried in a MAC (Media Access Control, media access control) CE (Control Element, control unit).

In other embodiments, the terminal monitors the UL grant sent by the network device, and transmits uplink data based on the first resource information corresponding to the monitored UL grant.

Wherein, the UL grant is scheduled by PDCCH scrambled by C-RNTI (Cell Radio Network Temporary Identifier, Cell Radio Network Temporary Identifier).

The terminal continuously monitors the UL grant sent by the network device. If the terminal monitors the UL grant, it is determined that the network device has allocated resource information to the terminal, and then the terminal continues to transmit uplink data based on the resource information.

In a possible implementation manner, the second information received by the terminal includes a contention conflict resolution identifier, and the terminal can monitor the UL grant sent by the network device, and transmit uplink data based on the first resource information corresponding to the monitored UL grant.

In another embodiment, the network device can also add an RRC message to the second information. If the terminal receives the RRC message, the terminal terminates the small data transmission process. message, RRCSetup (setup) message, RRCReject (reject) message, or other messages.

It should be noted that the embodiment shown in FIG. 4 includes four-step random access. For example, as shown in FIG. 5 , the terminal sends a random access preamble (Preamble) to the network device, and the network device sends a random access response to the terminal. , the random access response (RAR) includes TAC, resource information and TC-RNTI, the terminal sends Msg3 (a kind of message) to the network device, and the Msg3 includes RRC message and user data, then the network device sends Msg4 (a message) to the terminal A message), the Msg4 includes the contention conflict resolution flag and the UL grant.

In the method provided by this embodiment of the present application, when the RRC is in an inactive state, the terminal acquires the first resource information allocated by the network device based on random access, transmits uplink data based on the acquired first resource information, completes the SDT process, and ensures that The terminal transmits uplink data when the RRC is in an inactive state, which improves the accuracy rate of the terminal in transmitting uplink data, and also avoids additional signaling overhead.

In addition, when the RRC is in an inactive state, the terminal can continuously monitor the resource information sent by the network device, so that the terminal continues to transmit uplink data based on the received resource information, thereby improving the efficiency of data transmission.

On the basis of the embodiment shown in FIG. 3 , FIG. 6 shows a flowchart of a data transmission method provided by an exemplary embodiment of the present application. Referring to FIG. 6, steps 301-302 are replaced with steps 603-604, and the method includes:

Step 601: The terminal determines a random access preamble and fourth resource information for transmitting the random access preamble.

In this embodiment of the present application, the fourth resource information is used to transmit the random access preamble, and the fourth resource information is similar to the second resource information in the foregoing step 401, and details are not described herein again.

In addition, the process of this step 601 is similar to the process of the above-mentioned step 401, and will not be repeated here.

Step 602: The terminal determines fifth resource information of the first information corresponding to the random access preamble.

In the embodiment of the present application, the terminal sends the random access preamble and the first information to the network device, and the random access preamble and the first information are transmitted through different resource information, then the terminal needs to determine to transmit the random access preamble The fourth resource information of the first information and the fifth resource information of the first information.

Wherein, the fifth resource information is used to transmit the first information, and the fifth resource information includes a resource location for transmitting the first information.

In some embodiments, the first information includes an RRC message and user data.

For example, the RRC message is an RRC connection request, or other messages. The user data includes terminal identification, terminal capabilities or other data.

In this embodiment of the present application, the execution order of step 601 and step 602 is not limited. Steps 601 and 602 may be performed simultaneously, or step 601 may be performed after step 602 .

Step 603: The terminal sends a random access preamble based on the fourth resource information, and sends the first information based on the fifth resource information.

Step 604: The network device receives the random access preamble and the first information.

When the terminal is in the RRC inactive state, the random access preamble and the first information are sent to the network device. If the network device receives the random access preamble and the first information, the network device knows that the terminal needs to perform SDT.

In some embodiments, the second information includes at least one of the following:

(1) TAC.

(2) Competitive conflict resolution flag.

(3) C-RNTI.

Wherein, the TAC and the contention conflict resolution identifier are similar to those in the above-mentioned embodiment, and are not repeated here.

The C-RNTI is used to scramble the PDCCH (Physical Downlink Control Channel, physical downlink control channel), so that the terminal can determine the resource information allocated by the network device through the C-RNTI.

It should be noted that the main difference between the embodiment of the present application and the above-mentioned embodiment in FIG. 4 is: in the embodiment of FIG. 4, a random access preamble needs to be sent to the network device first, and then the network device returns a random access response before sending the first random access response. However, in this embodiment of the present application, the random access preamble and the first information are sent to the network device at one time, and the network device does not need to return a random access response.

In other embodiments, the second information further includes a UL grant for indicating the first resource information.

In a possible implementation manner, the UL grant is carried in a success RAR (success Random Access Response, successful random access response).

For example, as shown in Figure 7, a bit is added to the success RAR to indicate the UL grant.

In other embodiments, the terminal continuously monitors the UL grant sent by the network device, and if the terminal monitors the UL grant, it is determined that the network device has allocated resource information for the terminal, and then the terminal continues to transmit uplink data based on the resource information.

In a possible implementation manner, the second information received by the terminal includes a contention conflict resolution identifier, and the terminal can monitor the UL grant sent by the network device, and transmit uplink data based on the first resource information corresponding to the monitored UL grant.

In another embodiment, the network device can also add an RRC message to the second information. If the terminal receives the RRC message, the terminal terminates the small data transmission process. The RRC message may be an RRC Resume message, an RRC Release message, or an RRC Setup message. message, RRC Reject message, or other messages.

It should be noted that the embodiment shown in FIG. 6 includes two-step random access. For example, as shown in FIG. 8 , the terminal sends a random access preamble and first information to the network device, and the first information includes an RRC message and user data, the network device sends MsgB (a kind of message) to the terminal based on the received random access preamble and the first information, and the MsgB includes the contention conflict resolution identifier, UL grant, TAC and C-RNTI.

In the method provided by the embodiment of the present application, when the RRC is in an inactive state, the terminal acquires the first resource information allocated by the network device based on random access, and then transmits uplink data based on the first resource information, completes the SDT process, and ensures that the terminal The uplink data is transmitted in the inactive state of the RRC, which improves the accuracy rate of the terminal in transmitting the uplink data, and also avoids additional signaling overhead.

In addition, when the RRC is in an inactive state, the terminal can continuously monitor the resource information sent by the network device, so that the terminal continues to transmit uplink data based on the received resource information, thereby improving the efficiency of data transmission.

FIG. 9 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application, which is applied to a terminal. Referring to FIG. 9 , the apparatus includes:

A receiving module 901, configured to receive first resource information configured by a network device when the terminal is in the RRC inactive state, where the first resource information is used for the terminal to transmit uplink data in the RRC inactive state;

The transmission module 902 is configured to transmit uplink data based on the first resource information.

The apparatus provided by the embodiment of the present application, if the terminal is in the RRC inactive state, acquires resource information allocated by the network device for transmitting uplink data in the RRC inactive state, and then the terminal transmits uplink data based on the resource information, without the need for the RRC non-active state. The uplink data is transmitted after the active state is switched to the RRC connected state, which simplifies the process of transmitting uplink data when the terminal is in the RRC inactive state, thereby reducing signaling overhead.

In some embodiments, referring to FIG. 10, the apparatus further includes:

a sending module 903, configured to send the first information to the network device;

The receiving module 901 is configured to receive second information allocated by the network device, where the second information includes first resource information.

In some embodiments, the sending module 903 is configured to determine that the terminal meets the target condition, and send the first information to the network device.

In some embodiments, the target condition includes at least one of the following:

The user plane bearing DRB corresponding to the uplink data is allowed to trigger SDT;

The data volume of the uplink data is less than the preset data volume.

In some embodiments, target conditions include:

The cell to which the terminal currently belongs supports small data transmission SDT and the data volume of uplink data is less than the preset data volume.

In some embodiments, the sending module 903 is configured to:

Receive the random access response sent by the network device;

The first information is sent based on the random access response.

In some embodiments, referring to FIG. 10, the apparatus further includes:

A determination module 904, configured to determine a random access preamble and second resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT;

The sending module 903 is configured to send a random access preamble to the network device based on the second resource information.

In some embodiments, the random access response includes at least one of the following:

Timing advance signaling TAC;

third information, where the third information includes third resource information for transmitting the first information;

Temporary cell identity TC-RNTI.

In some embodiments, the contention conflict resolution identifier is included in the second information.

In some embodiments, the second information further includes an uplink grant UL grant for indicating the first resource information.

In some embodiments, the UL grant is carried in the MAC CE.

In some embodiments, the sending module 903 is configured to:

determining a random access preamble and fourth resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT;

determining the fifth resource information of the first information corresponding to the random access preamble;

The random access preamble is sent based on the fourth resource information, and the first information is sent based on the fifth resource information.

In some embodiments, the second information includes at least one of the following:

Timing advance signaling TAC;

Competitive conflict resolution identification;

Cell Identity C-RNTI.

In some embodiments, the second information further includes an uplink grant UL grant for indicating the first resource information.

In some embodiments, the UL grant is carried in the successful random access response success RAR.

In some embodiments, the receiving module 901 is configured to:

Monitor the UL grant sent by the network device, and the UL grant is scheduled by the PDCCH scrambled by the C-RNTI;

The uplink data is transmitted based on the first resource information corresponding to the monitored UL grant.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

Fig. 11 shows a block diagram of a data transmission apparatus provided by an exemplary embodiment of the present application, which is applied to a network device. Referring to Fig. 11, the apparatus includes:

The sending module 1101 is configured to send first resource information to the terminal, where the first resource information is used for the terminal to transmit uplink data in an RRC inactive state, and the terminal is used to transmit uplink data based on the first resource information.

The apparatus provided by the embodiment of the present application, if the terminal is in the RRC inactive state, acquires resource information allocated by the network device for transmitting uplink data in the RRC inactive state, and then the terminal transmits uplink data based on the resource information, without the need for the RRC non-active state. The uplink data is transmitted after the active state is switched to the RRC connected state, which simplifies the process of transmitting uplink data when the terminal is in the RRC inactive state, thereby reducing signaling overhead.

In some embodiments, referring to FIG. 12 , the apparatus further includes:

a receiving module 1102, configured to receive the first information sent by the terminal;

The sending module 1101 is configured to send the allocated second information to the terminal, where the second information includes first resource information.

In some embodiments, the receiving module 1102 is configured to receive a random access preamble sent by the terminal, where the random access preamble is used to instruct the terminal to perform small data transmission SDT

The sending module 1101 is configured to send a random access response to the terminal.

In some embodiments, the random access response includes at least one of the following:

Timing advance signaling TAC;

third information, where the third information includes third resource information for transmitting the first information;

Temporary cell identity TC-RNTI.

In some embodiments, the second information further includes a contention conflict resolution identifier.

In some embodiments, the second information further includes an uplink grant UL grant for indicating the first resource information.

In some embodiments, the UL grant is carried in the MAC CE.

In some embodiments, the receiving module 1102 is configured to receive the random access preamble and the first information.

In some embodiments, the second information further includes at least one of the following:

Timing advance signaling TAC;

Competitive conflict resolution identification;

Cell Identity C-RNTI.

In some embodiments, the second information further includes an uplink grant UL grant for indicating the first resource information.

In some embodiments, the UL grant is carried in the successful random access response success RAR.

In some embodiments, the sending module 1101 is configured to:

Send a UL grant to the terminal, and the UL grant is scheduled by the PDCCH scrambled by the C-RNTI;

The terminal is used to monitor the UL grant, and transmit uplink data based on the first resource information corresponding to the monitored UL grant.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

FIG. 13 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application. The communication device includes: a processor 1301 , a receiver 1302 , a transmitter 1303 , a memory 1304 , and a bus 1305 .

The processor 1301 includes one or more processing cores, and the processor 1301 executes various functional applications and information processing by running software programs and modules.

The receiver 1302 and the transmitter 1303 may be implemented as a communication component, which may be a communication chip.

The memory 1304 is connected to the processor 1301 through the bus 1305 .

The memory 1304 may be configured to store at least one program code, and the processor 1301 is configured to execute the at least one program code, so as to implement various steps in the above method embodiments.

Furthermore, the communication device may be a terminal or a base station. Memory 1304 may be implemented by any type or combination of volatile or non-volatile storage devices including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only Memory (EEPROM), Erasable Programmable Read Only Memory (EPROM), Static Anytime Access Memory (SRAM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Programmable Read Only Memory (PROM).

In an exemplary embodiment, a computer-readable storage medium is also provided, in which executable program code is stored, and the executable program code is loaded and executed by the processor to implement the above The method embodiment provides a data transmission method performed by a communication device.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, etc.

The above are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (59)

A data transmission method, characterized in that it is applied to a terminal, the method comprising: When the terminal is in the RRC inactive state, receiving first resource information configured by a network device, where the first resource information is used for the terminal to transmit uplink data in the RRC inactive state; The uplink data is transmitted based on the first resource information. The method according to claim 1, wherein before receiving the first resource information configured by the network device, the method further comprises: sending first information to the network device; Second information allocated by the network device is received, where the second information includes the first resource information. The method according to claim 2, wherein the sending the first information to the network device comprises: It is determined that the terminal meets the target condition, and the first information is sent to the network device. The method according to claim 3, wherein the target condition comprises at least one of the following: The user plane bearer DRB corresponding to the uplink data is allowed to trigger the small data transmission SDT; The data amount of the uplink data is smaller than the preset data amount. The method of claim 4, wherein the target condition comprises: The cell to which the terminal currently belongs supports the SDT and the data volume of the uplink data is less than a preset data volume. The method according to claim 2, wherein the sending the first information to the network device comprises: receiving a random access response sent by the network device; The first information is sent based on the random access response. The method according to claim 6, wherein before receiving the random access response sent by the network device, the method further comprises: determining a random access preamble and second resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; The random access preamble is sent to the network device based on the second resource information. The method according to claim 6, wherein the random access response includes at least one of the following: Timing advance signaling TAC; third information, where the third information includes third resource information for transmitting the first information; Temporary cell identity TC-RNTI. The method according to claim 6, wherein the second information includes a contention conflict resolution identifier. The method according to claim 9, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The method according to claim 10, wherein the UL grant is carried in a MAC CE. The method according to claim 2, wherein the sending the first information to the network device comprises: determining a random access preamble and the fourth resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; determining the fifth resource information of the first information corresponding to the random access preamble; The random access preamble is sent based on the fourth resource information, and the first information is sent based on the fifth resource information. The method according to claim 12, wherein the second information includes at least one of the following: Timing advance signaling TAC; Competitive conflict resolution identification; Cell Identity C-RNTI. The method according to claim 13, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The method according to claim 14, wherein the UL grant is carried in a successful random access response success RAR. The method according to claim 1, wherein the receiving the first resource information configured by the network device comprises: Monitor the UL grant sent by the network device, and the UL grant is scheduled by the PDCCH scrambled by the cell wireless network temporary identification C-RNTI; The uplink data is transmitted based on the monitored first resource information corresponding to the UL grant. A data transmission method, characterized in that, applied to a network device, the method comprising: Send first resource information to the terminal, where the first resource information is used by the terminal to transmit uplink data in the RRC inactive state, and the terminal is used to transmit uplink data based on the first resource information. The method according to claim 17, wherein before the sending the first resource information to the terminal, the method further comprises: receiving the first information sent by the terminal; The allocated second information is sent to the terminal, where the second information includes the first resource information. The method according to claim 18, wherein before the receiving the first information sent by the terminal, the method further comprises: receiving a random access preamble sent by the terminal, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; A random access response is sent to the terminal. The method according to claim 19, wherein the random access response includes at least one of the following: Timing advance signaling TAC; third information, where the third information includes third resource information for transmitting the first information; Temporary cell identity TC-RNTI. The method according to claim 20, wherein the second information further includes a contention conflict resolution identifier. The method according to claim 21, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The method according to claim 22, wherein the UL grant is carried in a MAC CE. The method according to claim 18, wherein the receiving the first information sent by the terminal comprises: A random access preamble and the first information are received. The method according to claim 24, wherein the second information further includes at least one of the following: Timing advance signaling TAC; Competitive conflict resolution identification; Cell Identity C-RNTI. The method according to claim 25, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The method according to claim 26, wherein the UL grant is carried in a successful random access response success RAR. The method according to claim 17, wherein the sending the first resource information to the terminal comprises: sending a UL grant to the terminal, where the UL grant is scheduled by the PDCCH scrambled by the cell wireless network temporary identification C-RNTI; The terminal is configured to monitor the UL grant, and transmit the uplink data based on the first resource information corresponding to the monitored UL grant. A data transmission device, characterized in that, applied to a terminal, the device comprising: A receiving module, configured to receive first resource information configured by a network device when the terminal is in the RRC inactive state, where the first resource information is used for the terminal to transmit uplink in the RRC inactive state data; A transmission module, configured to transmit uplink data based on the first resource information. The apparatus of claim 29, wherein the apparatus further comprises: a sending module, configured to send the first information to the network device; The receiving module is configured to receive second information allocated by the network device, where the second information includes the first resource information. The apparatus according to claim 30, wherein the sending module is configured to determine that the terminal meets a target condition, and send the first information to the network device. The apparatus of claim 31, wherein the target condition comprises at least one of the following: The user plane bearer DRB corresponding to the uplink data is allowed to trigger the small data transmission SDT; The data volume of the uplink data is less than the preset data volume. The apparatus of claim 32, wherein the target condition comprises: The cell to which the terminal currently belongs supports SDT, and the data amount of the uplink data is less than the preset data amount. The device according to claim 30, wherein the sending module is configured to: receiving a random access response sent by the network device; The first information is sent based on the random access response. The apparatus of claim 34, wherein the apparatus further comprises: a determining module, configured to determine a random access preamble and second resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; The sending module is configured to send the random access preamble to the network device based on the second resource information. The apparatus according to claim 34, wherein the random access response includes at least one of the following: Timing advance signaling TAC; third information, where the third information includes third resource information for transmitting the first information; Temporary cell identity TC-RNTI. The apparatus according to claim 34, wherein the second information includes a contention conflict resolution identifier. The apparatus according to claim 37, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The apparatus of claim 38, wherein the UL grant is carried in a MAC CE. The device according to claim 30, wherein the sending module is configured to: determining a random access preamble and fourth resource information for transmitting the random access preamble, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; determining the fifth resource information of the first information corresponding to the random access preamble; The random access preamble is sent based on the fourth resource information, and the first information is sent based on the fifth resource information. The device according to claim 40, wherein the second information includes at least one of the following: Timing advance signaling TAC; Competitive conflict resolution identification; Cell Identity C-RNTI. The apparatus according to claim 41, wherein the second information further comprises an uplink grant UL grant for indicating the first resource information. The apparatus according to claim 42, wherein the UL grant is carried in a successful random access response success RAR. The device according to claim 29, wherein the receiving module is configured to: Monitor the UL grant sent by the network device, and the UL grant is scheduled by the PDCCH scrambled by the cell wireless network temporary identification C-RNTI; The uplink data is transmitted based on the monitored first resource information corresponding to the UL grant. A data transmission device, characterized in that it is applied to network equipment, the device comprising: A sending module, configured to send first resource information to a terminal, where the first resource information is used by the terminal to transmit uplink data in the RRC inactive state, and the terminal is used to transmit uplink data based on the first resource information . The apparatus of claim 45, wherein the apparatus further comprises: a receiving module, configured to receive the first information sent by the terminal; The sending module is configured to send the allocated second information to the terminal, where the second information includes the first resource information. The apparatus of claim 46, wherein: the receiving module, configured to receive a random access preamble sent by the terminal, where the random access preamble is used to instruct the terminal to perform small data transmission SDT; The sending module is configured to send a random access response to the terminal. The apparatus according to claim 47, wherein the random access response includes at least one of the following: Timing advance signaling TAC; third information, where the third information includes third resource information for transmitting the first information; Temporary cell identity TC-RNTI. The apparatus according to claim 48, wherein the second information further includes a contention conflict resolution identifier. The apparatus according to claim 49, wherein the second information further includes an uplink grant UL grant for indicating the first resource information. The apparatus of claim 50, wherein the UL grant is carried in a MAC CE. The apparatus according to claim 46, wherein the receiving module is configured to receive a random access preamble and the first information. The apparatus according to claim 52, wherein the second information further includes at least one of the following: Timing advance signaling TAC; Competitive conflict resolution identification; Cell Identity C-RNTI. The apparatus according to claim 53, wherein the second information further comprises an uplink grant (UL grant) used to indicate the first resource information. The apparatus according to claim 54, wherein the UL grant is carried in a successful random access response success RAR. The device according to claim 45, wherein the sending module is configured to: sending a UL grant to the terminal, where the UL grant is scheduled by the PDCCH scrambled by the cell wireless network temporary identification C-RNTI; The terminal is configured to monitor the UL grant, and transmit the uplink data based on the first resource information corresponding to the monitored UL grant. A terminal, characterized in that the terminal comprises: processor; a transceiver connected to the processor; memory for storing executable program code for the processor; Wherein, the processor is configured to load and execute the executable program code to implement the data transmission method according to any one of claims 1 to 16. A network device, wherein the terminal includes: processor; a transceiver connected to the processor; memory for storing executable program code for the processor; Wherein, the processor is configured to load and execute the executable program code to implement the data transmission method according to any one of claims 17 to 28. A computer-readable storage medium, characterized in that the readable storage medium stores executable program codes, and the executable program codes are loaded and executed by the processor to implement any one of claims 1 to 28 the data transmission method.

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