WO2022001797A1 - Data transmission method and device - Google Patents

Abstract

The present application relates to the technical field of communications, and provides a data transmission method and device for solving the problem of packet loss of an unsuccessfully transmitted data packet in a case that unlicensed uplink dynamic transmission falls back to the random access process. The method comprises: a terminal sends a data packet to a network device by using a configuration licensed resource; in a case that a preset condition is satisfied, the terminal stores the data packet in a storage area of a first HARQ process, and executes the random access process, wherein the first HARQ process is different from a second HARQ process, and the second HARQ process is an HARQ process used in the random access process; and after the random access process is completed, the terminal transmits the data packet. The present application is applicable to the process of data transmission.

Description

Data transmission method and device

This application claims the priority of the Chinese patent application with the application number 202010609512.3 and the application name "Data Transmission Method and Device" filed with the State Intellectual Property Office on June 29, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a data transmission method and apparatus.

Background technique

Uplink dynamic authorization-free transmission is an "on-the-go" uplink data transmission method, that is, when the terminal needs to send data to the base station, the terminal directly uses the configuration authorization resources and pre-configured transmission parameters to send data to the base station, There is no need to first send a scheduling request to the base station and wait for a dynamic grant sent by the base station. Compared with the traditional uplink transmission method based on "request-grant", uplink dynamic grant-free transmission has the beneficial effects of significantly reducing signaling overhead, transmission delay, and terminal power consumption.

Currently, if the terminal has uplink data to transmit, and the terminal considers that the currently stored timing advance (TA) is valid, the terminal can use the configured authorized resources to transmit uplink data. After the uplink free dynamic authorization transmission, if the terminal does not receive any feedback from the network device for this data transmission within a preset time, the terminal may consider that the currently stored TA is invalid. Therefore, the terminal can trigger a random access (RA) procedure to obtain an accurate TA again. For description, this procedure is hereinafter referred to as "uplink dynamic grant-free transmission fallback to random access procedure".

However, since the HARQ process used for uplink dynamic grant-free transmission is the same as the HARQ process used for random access, the terminal needs to clear the HARQ process when the uplink dynamic grant-free transmission falls back to the random access process. The unsuccessfully transmitted data packets are stored in the storage area of the HARQ process, so that the storage area of the HARQ process can be used to cache the data of message A (message A, MsgA) or message 3 (message 3, Msg3) in the random access process. Since the storage area of the HARQ process no longer stores the unsuccessfully transmitted data packet, the physical layer of the terminal loses the data packet. Furthermore, when the terminal needs to retransmit the data packet to the network device, the upper layer of the terminal needs to retransmit the data packet to the physical layer of the terminal, which increases the transmission delay of the data packet.

SUMMARY OF THE INVENTION

The present application relates to a data transmission method and device, which are used to solve the problem that in the prior art, after the terminal falls back from the uplink dynamic authorization-free transmission to the random access process, the data packets that have not been successfully transmitted are lost or require high-level retransmission. problem.

To achieve the above purpose, the application provides the following technical solutions:

In a first aspect, a data transmission method is provided, comprising: a terminal sends a data packet to a network device using a configuration authorization resource; under the condition that a preset condition is met, the terminal sends a data packet in a first hybrid automatic repeat request (HARQ ) process storage area to store the data packet, and perform a random access process, wherein the first HARQ process is different from the second HARQ process, and the second HARQ process is the HARQ process used in the random access process; After the entry process, the terminal transmits the data packet.

Based on the above technical solutions, in the case where the uplink free dynamic authorization transmission falls back to the random access process, the terminal stores the unsuccessful transmission in the storage area of the HARQ process (that is, the first HARQ process) used in the non-random access process the data package. In this way, it is avoided that the physical layer of the terminal loses the data packet. Therefore, after the random access procedure is completed, the terminal can send the data packet without waiting for the upper layer to retransmit the data packet to the physical layer, thereby reducing the transmission delay of the data packet.

In a possible design, the terminal uses the configuration authorization resource to send the data packet to the network device, including: the terminal uses the configuration authorization resource corresponding to the target HARQ process to send the data packet to the network device; wherein, the target HARQ process is the first HARQ process or the first HARQ process. Two HARQ processes.

In a possible design, the preset conditions include one or more of the following: (condition 1) the terminal does not receive feedback information on the data packet from the network device within the first preset time period; (condition 2) the terminal is in the second No feedback information from the network device to the target HARQ process is received within the preset time period; (condition 3) the terminal receives the indication information sent by the network device, and the indication information is used to instruct the terminal to perform a random access procedure.

In a possible design, transmitting the data packet by the terminal includes: the terminal retransmits the data packet by using the configuration authorization resource corresponding to the first HARQ process or the configuration authorization resource corresponding to the third HARQ process.

In a possible design, the configuration authorization resource corresponding to the third HARQ process is earlier than the configuration authorization resource corresponding to the first HARQ process in the time domain. In this way, compared with using the configuration authorization resource corresponding to the first HARQ process, the terminal uses the configuration authorization resource corresponding to the third HARQ process to transmit the data packet, which can reduce the waiting time of the data packet for transmission.

In a possible design, the terminal transmits data packets, including: the terminal uses the received downlink control information

The uplink transmission resource indicated by (downlink control information, DCI) transmits the data packet. It can be understood that the uplink transmission resources indicated by the DCI may be more flexible, so that the uplink transmission resources indicated by the DCI may be earlier than the configuration grant resources corresponding to the first HARQ process in the time domain. In this way, compared to using the configuration authorization resource corresponding to the first HARQ process, the terminal uses the uplink transmission resource indicated by the DCI to transmit the data packet, which can reduce the waiting time of the data packet for transmission, thereby uploading the data packet as soon as possible.

In a possible design, the DCI also includes an index value of a modulation and coding scheme (MCS), and the transport block size TBS corresponding to the index value of the MCS is equal to the TBS of the data packet.

In a possible design, before the terminal transmits the data packet, the method further includes: the terminal sends first indication information to the network device, where the first indication information is used to instruct the storage area of the first HARQ process to store the data packet; the terminal receives the network device. DCI sent by the device.

In a possible design, if the random access process is a four-step random access process, the first indication information is carried in message 3 or uplink control information; or, if the random access process is a two-step random access process process, the first indication information is carried in message A or uplink control information (uplink control information, UCI). It can be understood that, the terminal transmits the first indication information by multiplexing the signaling in the random access process, which can reduce signaling overhead.

In a possible design, before the terminal uses the configuration authorization resource to send the data packet to the network device, the method further includes: the terminal determines that the TA stored by itself is valid.

In a second aspect, a communication apparatus is provided, including: a communication unit, configured to send a data packet to a network device using a configuration authorization resource; The data packet is stored in the HARQ, and the random access process is performed; wherein, the first HARQ process is different from the second HARQ process, and the second HARQ process is the HARQ process used in the random access process; the communication unit is also used to complete the random access process. After the entry process, the packet is transmitted.

In a possible design, the communication unit is specifically configured to send a data packet to the network device by using the configuration authorization resource corresponding to the target HARQ process, wherein the target HARQ process is the first HARQ process or the second HARQ process.

In a possible design, the preset conditions include one or more of the following: (condition 1) the terminal does not receive feedback information on the data packet from the network device within the first preset time period; (condition 2) the terminal is in the second No feedback information from the network device to the target HARQ process is received within the preset time period; (condition 3) the terminal receives the indication information sent by the network device, and the indication information is used to instruct the terminal to perform a random access procedure.

In a possible design, the communication unit is specifically configured to retransmit the data packet by using the configuration authorization resource corresponding to the first HARQ process or the configuration authorization resource corresponding to the third HARQ process.

In a possible design, the configuration authorization resource corresponding to the third HARQ process is earlier than the configuration authorization resource corresponding to the first HARQ process in the time domain.

In a possible design, the communication unit is specifically configured to transmit the data packet by using the uplink transmission resource indicated by the received downlink control information DCI.

In a possible design, the DCI further includes an index value of the MCS, and the transport block size TBS corresponding to the index value of the MCS is equal to the TBS of the data packet.

In a possible design, the communication unit is further configured to send first indication information to the network device, where the first indication information is used to instruct the storage area of the first HARQ process to store data packets; and receive the DCI sent by the network device.

In a possible design, if the random access process is a four-step random access process, the first indication information is carried in message 3 or uplink control information; or, if the random access process is a two-step random access process process, the first indication information is carried in the message A or the uplink control information.

In a possible design, the processing unit is also used to determine that the TA stored by itself is valid.

In a third aspect, a communication device is provided, comprising: a processor, which is coupled to a memory, reads instructions in the memory, and implements the data transmission method described in the first aspect according to the instructions.

In a fourth aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium, which, when executed on a communication device, enable the communication device to execute the data transmission method described in the first aspect.

In a fifth aspect, there is provided a computer program product comprising instructions which, when executed on a communication device, enable the communication device to perform the data transmission method described in the first aspect above.

In a sixth aspect, a chip is provided, the chip includes a processing module and a communication interface, the communication interface is used for receiving an input signal and providing it to the processing module, and/or for outputting a signal generated by the processing module, and the processing module is used for The data transmission method described in any one of the first aspect above is performed.

In one embodiment, the processing module may execute code instructions to execute the data transmission method described in any one of the first aspect above. The code instruction can come from a memory inside the chip or from a memory outside the chip. Optionally, the processing module may be a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin on the chip.

Wherein, for the technical effect brought by any one of the design methods from the second aspect to the sixth aspect, please refer to the beneficial effects in the corresponding methods provided above and the technical effects brought by the design method, which will not be repeated here. .

Description of drawings

FIG. 1 is a schematic diagram of a two-step-based random access process provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a four-step-based random access according to an embodiment of the present application;

FIG. 3 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

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

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

In the description of this application, unless otherwise stated, "/" means "or", for example, A/B can mean A or B. In this article, "and/or" is only an association relationship to describe the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone these three situations. Further, "at least one" means one or more, and "plurality" means two or more. The words "first" and "second" do not limit the quantity and execution order, and the words "first", "second" and the like do not limit certain differences.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

In the description of this application, "indication" may include direct indication and indirect indication, as well as explicit indication and implicit indication. The information indicated by certain information (such as the first indication information and the second indication information described below) is called information to be indicated, and in the specific implementation process, there are many ways to indicate the information to be indicated. For example, the information to be indicated may be directly indicated, wherein the information to be indicated itself or an index of the information to be indicated, etc. For another example, the information to be indicated may also be indirectly indicated by indicating other information, wherein there is an association relationship between the other information and the information to be indicated. For another example, only a part of the information to be indicated may be indicated, while other parts of the information to be indicated are known or agreed in advance. In addition, the indication of specific information can also be implemented by means of the arrangement order of each information pre-agreed (for example, stipulated by the protocol), thereby reducing the indication overhead to a certain extent.

In order to facilitate the understanding of the technical solutions of the present application, the following briefly introduces the terms involved in the present application.

1. Configured grant (CG) resources

The configuration authorization resource may include a first type (type1) configuration grant (configured grant type 1) resource, and a second type (type2) configuration grant (configured grant type 2) resource.

The configuration method of type1CG resources is: the network device configures all transmission resources and transmission parameters for the terminal through high-level parameters (such as ConfiguredGrantConfig), such as: time domain resource period, open-loop power control related parameters, waveform, redundancy version sequence, repetition frequency, frequency hopping mode, resource allocation type, number of hybrid automatic repeat request (HARQ) processes, DMRS-related parameters, MCS table, resource block group (RBG) size, and time domain resources, All transmission resources and transmission parameters including frequency domain resources, MCS, etc.

The configuration method of type2 CG resources is as follows: First, the network device configures some transmission resources and transmission parameters to the terminal through high-level parameters (such as ConfiguredGrantConfig), such as the period of time domain resources, open-loop power control related parameters, waveforms, and redundant version sequences. , number of repetitions, frequency hopping mode, resource allocation type, number of HARQ processes, DMRS related parameters, modulation and coding strategy table, RBG size; after that, the network device sends DCI (for example, Configured-Scheduling Radio Network Temporary Identity scrambled DCI to the terminal) ) to activate type2 CG resources, and configure transmission resources and transmission parameters including time domain resources, frequency domain resources, DMRS-related parameters, MCS, etc. at the same time. It should be noted that the type2 CG resource can only be used after being activated.

It should be noted that the configuration authorization resource may have other names, such as a pre-configured uplink resource (PUR), which is not limited in this embodiment of the present application.

2. Random access process

The random access process is a process of establishing a connection with a network device before a terminal enters a connected/active state from an idle/inactive state. The main purpose of the random access procedure is to establish uplink synchronization and to request the network device to allocate uplink resources to the terminal, so that the terminal can perform corresponding data transmission through the uplink resources.

According to the number of steps required to complete the random access procedure, the random access procedure can be divided into two-step based random access (2-step RA) and four-step based random access (4-step RA).

(1)4-step RA

As shown in Figure 1, the specific process of 4-step RA is as follows:

S101. The terminal sends a message 1 (message 1, Msg1) to a network device.

Wherein, the Msg1 includes a preamble.

S102. After receiving the Msg1, the network device sends the Msg2 to the terminal.

Wherein, the Msg2 includes RAR. The RAR may include an uplink scheduling grant (UL grant), the number of the preamble received by the network device, the timing adjustment information, the uplink resource location indication information allocated for the terminal device, and the temporarily allocated cell wireless network temporary identity (temporary cell). radio network temporary identifier, TC-RNTI), etc.

S103. The terminal sends Msg3 to the network device.

S104, the network device sends Msg4 to the terminal.

Wherein, the Msg4 includes a contention resolution message (CRM).

When the terminal device receives the message 4, and the received contention resolution identity (CRID) of the CRM matches the identification information transmitted by the terminal, the terminal device may consider that the random access is successful.

(2)2-step RA

As shown in Figure 2, the specific process of 2-step RA is as follows:

S201. The terminal sends a message A (message A, MsgA) to a network device.

Wherein, the MsgA is composed of a physical random access channel (physical random access channel, PRACH) and a physical uplink shared channel (physical uplink shared channel, PUSCH); wherein, the PRACH is used for sending a preamble (preamble), the PUSCH is used to transmit control plane (CP) data.

Optionally, the Preamble is used to indicate the accurate time of the effective signal access of the network device, so as to avoid the loss of the effective signal.

S202, the network device sends a message B (message B, MsgB) to the terminal.

In a possible design, when the network device successfully decodes the MsgA and obtains the PUSCH, the MsgB includes a random access response (RA response, RAR) used to indicate that the PUSCH is successfully received.

In another possible design, when the network device fails to decode the MsgA and does not obtain the PUSCH, the MsgB includes an RAR for indicating the failure to receive the PUSCH.

It can be understood that MsgA in 2-step RA can be regarded as the merger of Msg1 and Msg3 in 4-step RA, while MsgB can be regarded as the merger of Msg2 and Msg4. Therefore, compared with 4-step RA, 2 -step RA can achieve lower access delay.

3. Early data transmission (EDT) technology

EDT is essentially a kind of RA, the difference is that EDT can make the terminal or network device use the steps in the RA to transmit data, so as to reduce the signaling overhead and the power consumption of the terminal.

Taking 4-step RA as an example, based on the EDT technology, the terminal can carry the uplink user plane data in Msg3 and send it to the base station. Alternatively, the base station may carry the downlink user data in Msg4 and send it to the terminal.

Taking 2-step RA as an example, based on the EDT technology, the terminal can carry the uplink user plane data in the MsgA and send it to the base station. Alternatively, the base station may carry the downlink user data in the MsgB and send it to the terminal.

Since the base station does not know the capabilities of the terminal and the size of the data packet to be transmitted, the base station configures a threshold of the transport block size (TBS), and the UE decides whether to use the EDT technology to transmit data according to the threshold of the TBS. When the data to be sent is less than or equal to TBS, the data to be sent can be transmitted by using the EDT technology. When the data to be sent is larger than TBS, the data to be sent cannot be transmitted by using the EDT technology.

4. TA

An important feature of uplink transmission is that uplink transmissions from different terminals in the same cell do not interfere with each other.

In order to avoid intra-cell interference, the network equipment requires that signals from different terminals in the same subframe but different frequency domain resources (eg, different resource blocks (RBs)) arrive at the network equipment at a time basically aligned. As long as the network device receives the uplink data sent by the terminal within the cyclic prefix (Cyclic Prefix, CP) range, it can correctly decode the uplink data. Therefore, uplink synchronization requires the time when signals from different terminals in the same subframe arrive at the network device. All fall within the CP.

To this end, a mechanism of Uplink Timing Advance is proposed. The main function of the TA is to ensure the uplink synchronization between the terminal and the network equipment. From the perspective of the terminal, TA is essentially a negative offset (negative offset) between the start time of receiving the downlink subframe and the time of transmitting the uplink subframe. By appropriately controlling the offset of each terminal, the network device can control the time when the uplink signals from different terminals arrive at the network device. For a terminal farther away from the network device, due to a larger transmission delay, it is necessary to send uplink data earlier than a terminal closer to the network device.

5. HARQ

HARQ is a technology that combines forward error correction (or forward error correction code) (forward error correction, FEC) and automatic repeat request (automatic repeat request, ARQ) methods. Errors are automatically corrected within the error correction capability range, and beyond the error correction range, the sender is required to retransmit, which increases system reliability and improves system transmission efficiency.

Among them, FEC means that the data sent by the sender includes forward error correction codes or redundant information. When the receiver receives the data, it passes a check (for example, cyclic redundancy check (CRC)) ) After an error is found, it can be corrected by forward error correction code or redundant information, so that the sender can reduce the number of retransmissions (ie, retransmit data).

ARQ means that the receiving end judges the correctness of the received data by checking (for example, CRC check), if the data is received correctly, the receiving end sends an ACK to inform the sending end, otherwise the receiving end sends a NACK to inform the sending end, and the sending end receives When NACK, the data can be retransmitted to the receiver. ACK and NACK are HARQ feedback.

6. HARQ process (process)

HARQ uses the stop-and-wait protocol to send data. In the stop-and-wait protocol, after the sender sends a transport block (TB), it stops and waits for an acknowledgment. The receiver will use 1-bit information to perform ACK feedback or NACK feedback on the TB. However, the sender stops and waits for an acknowledgment after each transmission, resulting in very low throughput. Therefore, multiple parallel HARQ processes can be used: while one HARQ process is waiting for an acknowledgment, the sender can use another HARQ process to continue sending data.

Exemplarily, the terminal uses the first HARQ process to send TB1, finishes sending TB1 at time T1, receives HARQ feedback from TB1 at time T2, and waits for the confirmation of TB1 during the time period from T1 to T2, and waits for the confirmation of this time. During a period of time, the second HARQ process can be used to send TB2, after sending TB2 at time T2, and receiving HARQ feedback of TB2 at time T3, during the time period from T2 to T3, wait for the confirmation of TB2, and wait for the confirmation of this time. For a period of time, the third HARQ process can be used to send TB3.

It should be noted that each HARQ process can process one TB in one transmission time interval (transmission time interval, TTI), and can also process multiple TBs (for example, in the case of space division multiplexing).

In general, one grant resource (eg, uplink grant or sideline grant) is associated with one HARQ process. What is more special is that multiple authorized resources included in a TTI package (bundle) are associated with the same HARQ process, that is, transmission on multiple authorized resources included in a TTI bundle (for example, uplink transmission, or, sideline transmission, or, downlink transmission) corresponds to the same HARQ process. A TTI bundle includes multiple consecutive TTIs.

Exemplarily, the transmission in a TTI bundle can be understood as a TB needs to perform one or more retransmissions after a new transmission, and the transmitting end associates multiple transmissions of the same TB with the same HARQ process. For the receiving end, the data received multiple times in the same HARQ process may be put into the same buffer (for example, a HARQ buffer (buffer) or a soft buffer (soft buffer)) for soft combining and decoding.

In the implementation of this application, one HARQ process may be identified by an ID of one HARQ process.

The above is an introduction to the terms involved in the examples of this application, which will not be repeated below.

The technical solutions provided in the embodiments of the present application can be applied to various communication systems, for example, a Long Term Evolution (LTE) communication system, a new radio (NR) using the fifth generation (5th generation, 5G) communication technology ) communication system, future evolution system or multiple communication fusion systems, etc. The technical solutions provided in this application can be applied to various application scenarios, such as machine to machine (M2M), macro-micro communication, enhanced mobile broadband (eMBB), ultra-reliable and ultra-low latency Communication (ultra-reliable & low latency communication, uRLLC) and massive IoT communication (massive machine type communication, mMTC) and other scenarios. These scenarios may include but are not limited to: a communication scenario between a communication device and a communication device, a communication scenario between a network device and a network device, a communication scenario between a network device and a communication device, and the like.

As shown in FIG. 3 , an architecture diagram of a communication system provided by an embodiment of the present application, the communication system architecture may include one or more network devices (only one is shown in FIG. 3 ) and one or more network devices connected to each network device. multiple terminals.

The network device may be a base station or a base station controller for wireless communication. For example, the base station may include various types of base stations, such as a micro base station (also referred to as a small cell), a macro base station, a relay station, an access point, etc., which are not specifically limited in this embodiment of the present application. In the embodiment of the present application, the base station may be an evolutional node B (evolutional node B, eNB or e-NodeB) in long term evolution (long term evolution, LTE), an internet of things (internet of things, IoT) or a narrowband thing The eNB in the Internet of Things (narrow band-internet of things, NB-IoT), the base station in the future 5G mobile communication network or the future evolution of the public land mobile network (public land mobile network, PLMN), the embodiment of this application does not make any limit. In this embodiment of the present application, the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system. In the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the apparatus for implementing the functions of the network equipment as the network equipment as an example.

The network equipment mentioned in this application, such as a base station, generally includes a baseband unit (baseband unit, BBU), a remote radio unit (remote radio unit, RRU), an antenna, and a feeder for connecting the RRU and the antenna. Among them, the BBU is used for signal modulation. The RRU is responsible for radio frequency processing. The antenna is responsible for the conversion between the guided traveling waves on the cable and the space waves in the air. On the one hand, the distributed base station greatly shortens the length of the feeder between the RRU and the antenna, which can reduce the signal loss and the cost of the feeder. On the other hand, the RRU plus antenna is relatively small and can be installed anywhere, making network planning more flexible. In addition to the remote RRU, all BBUs can be centralized and placed in the central office (CO). Through this centralized method, the number of base station computer rooms can be greatly reduced, and supporting equipment, especially air conditioners, can be reduced. Energy consumption can reduce a lot of carbon emissions. In addition, after the scattered BBUs are integrated into a BBU baseband pool, they can be managed and scheduled in a unified manner, and resource allocation is more flexible. In this mode, all physical base stations have evolved into virtual base stations. All virtual base stations share the user's data transmission and reception, channel quality and other information in the BBU baseband pool, and cooperate with each other to realize joint scheduling.

In some deployments, a base station may include a centralized unit (CU) and a distributed unit (DU). The base station may also include an active antenna unit (AAU). The CU implements some functions of the base station, and the DU implements some functions of the base station. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, therefore, under this architecture, higher-layer signaling, such as RRC layer signaling or PDCP layer signaling, can also It is considered to be sent by DU, or, sent by DU+AAU. It can be understood that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network devices in the RAN, and the CU can also be divided into network devices in the core network (core network, CN), which is not limited here.

A terminal is a device with wireless transceiver function. Terminals can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal equipment may be user equipment (user equipment, UE). The UE includes a handheld device, a vehicle-mounted device, a wearable device or a computing device with a wireless communication function. Exemplarily, the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, intelligent Wireless terminals in power grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on. In this embodiment of the present application, the device for implementing the function of the terminal may be a terminal, or may be a device capable of supporting the terminal to implement the function, such as a chip system. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the functions of the terminal as the terminal as an example.

The network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

FIG. 4 is a schematic diagram of a hardware structure of a network device and a terminal according to an embodiment of the present application.

The terminal includes at least one processor 101 and at least one transceiver 103 . Optionally, the terminal may further include an output device 104 , an input device 105 and at least one memory 102 .

The processor 101, the memory 102 and the transceiver 103 are connected by a bus. The processor 101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more modules for controlling the execution of the programs of the present application. integrated circuit. The processor 101 may also include multiple CPUs, and the processor 101 may be a single-CPU processor or a multi-CPU processor. A processor herein may refer to one or more devices, circuits, or processing cores for processing data (eg, computer program instructions).

The memory 102 may be read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (RAM), or other type of static storage device that can store information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Any other medium accessed is not limited in this embodiment of the present application. The memory 102 may exist independently and be connected to the processor 101 through a bus. The memory 102 may also be integrated with the processor 101 . Wherein, the memory 102 is used for storing the application program code for executing the solution of the present application, and the execution is controlled by the processor 101 . The processor 101 is configured to execute the computer program codes stored in the memory 102, so as to implement the methods provided by the embodiments of the present application.

The transceiver 103 can use any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. . The transceiver 103 includes a transmitter Tx and a receiver Rx.

The output device 104 communicates with the processor 101 and can display information in a variety of ways. For example, the output device 104 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 105 is in communication with the processor 101 and can receive user input in a variety of ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

The network device includes at least one processor 201 , at least one memory 202 , at least one transceiver 203 and at least one network interface 204 . The processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected by a bus. Wherein, the network interface 204 is used to connect with the core network device through a link (such as the S1 interface), or connect with the network interface of other network devices through a wired or wireless link (such as the X2 interface) (not shown in the figure), This embodiment of the present application does not specifically limit this. In addition, for the description of the processor 201, the memory 202, and the transceiver 203, reference may be made to the description of the processor 101, the memory 102, and the transceiver 103 in the terminal, and details are not repeated here.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

As shown in FIG. 5 , a data transmission method provided in an embodiment of the present application includes the following steps:

S301. The terminal sends a data packet to a network device by using a configuration authorization resource.

The configuration authorization resources include time domain resources. Further, the configuration authorized resources may also include airspace resources and/or frequency domain resources.

It is understood that the configuration authorization resource usually occurs periodically. In one cycle, the terminal may be configured with multiple configuration authorization resources.

In a possible design, the configuration authorization resource may be configured to the terminal by the network device. Exemplarily, the terminal may receive the configuration information of the uplink dynamic authorization-free transmission sent by the network device, and then the terminal may determine to configure the authorization resource according to the configuration information of the uplink dynamic authorization-free transmission. The configuration information of uplink dynamic authorization-free transmission can be carried in radio resource control (radio resource control, RRC) signaling, media access control (media access control, MAC) signaling, or downlink control information (downlink control information, DCI). Uplink dynamic grant-free transmission can also be called uplink transmission without scheduling (uplink transmission without scheduling) or uplink transmission with configured grant.

In another possible design, the configuration authorization resource may be pre-agreed between the terminal and the network device, or pre-defined in a communication standard.

As a possible implementation manner of step S301, the terminal sends the data packet to the network device by using the configuration authorization resource corresponding to the target HARQ process. It can be understood that the target HARQ process is one of multiple HARQ processes supported by the terminal. Moreover, the target HARQ process supports uplink dynamic grant-free transmission.

In the embodiment of the present application, in the HARQ process configured by the terminal, only one HARQ process may support uplink dynamic grant-free transmission, or there may be multiple HARQ processes support uplink dynamic grant-free transmission.

Furthermore, when only a single HAQR process supports uplink dynamic grant-free transmission, this HARQ process corresponds to all configured grant resources. When multiple HARQ processes support uplink dynamic grant-free transmission, one HARQ process in the multiple HARQ processes corresponds to one or more configuration grant resources.

In this embodiment of the present application, the target HARQ process may be the first HARQ process or the second HARQ process. Wherein, both the first HARQ process and the second HARQ process support uplink dynamic grant-free transmission. The second HARQ process is the HARQ process used in the random access process. The first HARQ process is different from the second HARQ process.

Optionally, if only one HARQ process configured by the terminal supports uplink dynamic grant-free transmission, the target HARQ process is the first HARQ process.

Optionally, if the HARQ process configured by the terminal has multiple HARQ processes that support uplink dynamic grant-free transmission, the target HARQ process may be the first HARQ process or the second HARQ process.

Optionally, the target HARQ process can be determined in the following manner:

Manner 1: The target HARQ process may be configured by signaling sent by the network device to the terminal.

For example, the signaling sent by the network device to the terminal carries the target HARQ process ID, so the terminal can determine the target HARQ process according to the target HARQ process ID.

Manner 2: The target HARQ process may be determined according to the index of the configuration authorization resource used by the terminal. Exemplarily, the index for configuring the grant resource may be a slot index, a symbol index, or the like.

It can be understood that there is a corresponding relationship between the HARQ process and the configuration authorized resources. That is, there is a corresponding relationship between the HARQ process ID and the index for configuring the authorized resource. Therefore, the terminal can determine the corresponding HARQ process according to an index of a configuration authorization resource.

Manner 3: The target HARQ process may be determined according to other parameters. Exemplarily, other parameters may be the period for configuring the grant resource, and/or the maximum number of HARQ processes supported by uplink dynamic free grant transmission, and/or the offset value of the HAQR process number.

It should be noted that, for the detailed introduction of the third mode, reference may be made to the prior art, and details are not described herein in the embodiments of the present application.

Certainly, the target HARQ process may also be determined in other manners, which is not limited in this embodiment of the present application.

In this embodiment of the present application, optionally, before the terminal performs step S301, the terminal may determine that the TA currently stored by the terminal is valid.

It can be understood that, if the terminal determines that the TA stored by itself is invalid, the terminal will first obtain a valid TA, and then execute step S301.

Optionally, the terminal determines whether the currently stored TA is valid, and may adopt one or more of the following implementation manners:

Manner 1: The terminal is provided with a timer, and the timer is used to record the effective duration of the currently stored TA. Furthermore, if the timer does not expire, the terminal determines that the currently stored TA is valid; or, if the timer expires, the terminal determines that the currently stored TA is invalid.

Mode 2: The terminal determines whether the currently stored TA is valid according to whether the serving cell has changed. Wherein, whether the serving cell has changed refers to whether the first cell and the second cell are the same cell. The first cell is a cell currently serving the terminal. The second cell is the cell corresponding to the TA currently stored by the terminal.

If the first cell and the second cell are the same cell, the terminal determines that the currently stored TA is valid; or, if the first cell and the second cell are not the same cell, the terminal determines that the currently stored TA is invalid.

Manner 3: The terminal determines whether the currently stored TA is valid according to at least two measurement results of the signal quality of the cell.

For example, if the difference between the first measurement result and the second measurement result is less than or equal to a preset value, the terminal determines that the currently stored TA is valid; or, if the difference between the first measurement result and the second measurement result is If the difference between them is greater than the preset value, the terminal determines that the currently stored TA is invalid. The first measurement result may be the measurement result of the signal quality of the cell when the terminal stores the TA. The second measurement result is the measurement result of the signal quality of the cell by the terminal at the current moment.

Optionally, the signal quality of the cell may be a reference signal or a reference signal received power (reference signal received power, RSRP) of a synchronization signal block, which is not limited in this embodiment of the present application.

S302. In the case that the preset condition is satisfied, the terminal stores the data packet in the storage area of the first HARQ process, and performs the random access process.

Optionally, the preset conditions include one or more of the following:

Condition 1. The terminal does not receive the feedback information of the data packet from the network device within a first preset time period.

The first preset duration may be configured by signaling delivered by the network device, or set by the terminal and the network device in a pre-agreed manner, which is not limited in this embodiment of the present application.

Optionally, the signaling for configuring the first preset duration may be carried in an RRC message, MAC CE or DCI.

The above feedback information may include: ACK information, NACK information or retransmission scheduling information.

Condition 2: The terminal does not receive feedback information from the network device on the target HARQ process within a second preset time period.

The second preset duration may be configured by signaling delivered by the network device, or set by the terminal and the network device in a pre-agreed manner, which is not limited in this embodiment of the present application.

Optionally, the signaling for configuring the second preset duration may be carried in an RRC message, MAC CE or DCI.

Condition 3: The terminal receives the indication information sent by the network device. The indication information is used to instruct the terminal to perform a random access procedure.

Optionally, the random access process may be a two-step-based random access process, a four-step-based random access process, or a four-step-based data early transmission process, which is not limited in this embodiment of the present application.

It can be understood that, in addition to the above conditions 1 to 3, the preset conditions may also be other conditions, which are not limited in this embodiment of the present application.

In a possible implementation manner, when the target HARQ process is the second HARQ process, the terminal buffers the data packets stored in the storage area of the second HARQ process to the first HARQ process under the condition that the preset conditions are met. in the storage area of the second HARQ process, and clear the data packets stored in the storage area of the second HARQ process. After that, the terminal performs a random access procedure using the second HARQ process.

In another possible implementation manner, when the target HARQ process is the first HARQ process, the terminal stores the data packet in the storage area of the first HARQ process and uses the Two HARQ processes perform random access procedures.

It can be understood that, compared with that the target HARQ process is the second HARQ process, the target HARQ process being the first HARQ process is beneficial to simplify the specific implementation of step S302.

In this embodiment of the present application, for the specific implementation steps of the terminal performing the random access process, reference may be made to the above, and details are not repeated here.

S303. After completing the random access process, the terminal transmits a data packet.

Three different implementation manners of step S303 will be described in detail below. Among them, the first implementation and the third implementation are applicable to the scenario in which the uplink dynamic grant-free transmission supports one or more HARQ processes. Implementation mode 2 is suitable for a scenario where uplink dynamic grant-free transmission supports multiple HARQ processes.

Implementation manner 1: The terminal transmits the data packet by using the configuration authorization resource corresponding to the first HARQ process.

In implementation manner 2, the terminal transmits the data packet by using the configuration authorization resource corresponding to the third HARQ process.

The third HARQ process is different from the first HARQ process and the second HARQ process. The third HARQ process also supports uplink dynamic grant-free transmission.

Optionally, if the time point when the terminal completes the random access process is taken as the starting time point, the configuration authorization resource corresponding to the third HARQ process is earlier than the configuration authorization resource corresponding to the first HARQ process in the time domain. In this way, compared to using the configuration authorization resource corresponding to the first HARQ process, the terminal uses the configuration authorization resource corresponding to the third HARQ process to transmit the data packet, which can reduce the waiting time of the data packet for transmission.

Optionally, after the terminal buffers the data packets stored in the storage area of the first HARQ process into the storage area of the third HARQ process, the terminal may clear the data packets stored in the storage area of the first HARQ process.

Implementation mode 3: The terminal transmits the data packet by using the uplink transmission resource indicated by the received DCI.

Wherein, the DCI is sent to the terminal by the network device after the random access procedure is completed.

Optionally, if the time point when the terminal completes the random access process is taken as the start time point, the uplink transmission resources indicated by the DCI are earlier than the configuration authorization resources corresponding to the first HARQ process in the time domain. In this way, compared to using the configuration authorization resources corresponding to the first HARQ process, the terminal uses the uplink transmission resources indicated by the DCI to transmit the data packets, which can reduce the waiting time of the data packets for transmission, thereby completing the uplink transmission of the data packets as soon as possible. transmission.

Optionally, the DCI further includes an index value of the MCS. When the index value of the MCS is not a reserved (reserved) value, the TBS corresponding to the index value of the MCS is equal to the TBS corresponding to the data packet buffered by the first HARQ process. When the index value of the MAC is a reserved value, the TBS corresponding to the data packet buffered by the first HARQ process is equal to the TBS configured for uplink dynamic authorization-free transmission.

Optionally, when there are multiple sets of CGs, or when one CG corresponds to multiple HARQ processes, the DCI further includes the CG index and/or the ID of the HARQ process.

In this embodiment of the present application, before the terminal transmits the data packet, the terminal may send the first indication information to the network device. The first indication information is used to indicate that the data packet is stored in the storage area of the first HARQ process. After that, the terminal receives the DCI sent by the network device.

In a possible design, the terminal sends the first indication information to the network device after completing the random access procedure.

In another possible design, the terminal sends the first indication information to the network device during the random access process.

It can be understood that, when the first indication information is sent in the random access process, the first indication information can multiplex the signaling in the random access process, so as to reduce and save signaling overhead.

The specific implementation of the first indication information will be described below.

(1) The first indication information is implemented in an explicit manner.

Exemplarily, when the uplink dynamic grant-free transmission only supports the first HARQ process, the first indication information may be information indicated by one bit. The value of the one bit is the first value, which may represent the first indication information. It can be understood that the value of the one bit is other values, which can represent other information. For example, the value of the one bit is the second value, which represents the second indication information. The second indication information is used to indicate that the data to be sent is not buffered in the storage area of the first HARQ process.

Exemplarily, when the uplink dynamic grant-free transmission supports multiple HARQ processes, the first indication information may include the ID of the first HARQ process, so that the network device knows that the storage area of the first HARQ process stores data to be sent. Further, if the terminal is configured with multiple sets of CG configurations, and the HARQ processes used by the multiple sets of CG configurations overlap, the first indication information may further include: the number or index of the CG configuration.

Optionally, if the random access process performed by the terminal in step S302 is a four-step-based random access process or a data early transmission process, the first indication information is carried in Msg3, which can be specifically implemented as: the first indication information carries In the MAC CE of Msg3.

Optionally, if the random access procedure performed by the terminal in step S302 is 2-step RA, the first indication information is carried in MsgB. It can be specifically implemented as: the first indication information is carried in the MAC CE of MsgA.

(2) The first indication information is implemented in an implicit manner.

For example, in the random access process, when the terminal sends the preamble with the first time-frequency resource, it indicates that the storage area of the first HARQ process stores the data to be sent, so that the terminal sends the first indication information to the network device implicitly. Purpose. On the contrary, when the terminal sends the preamble using the second time-frequency resource, it indicates that the storage area of the first HARQ process does not store the data to be sent. This is equivalent to that the terminal does not send the first indication information.

For another example, in the random access process, the terminal sends the first preamble, indicating that the storage area of the first HARQ process stores data to be sent, thereby implicitly achieving the purpose of the terminal sending the first indication information to the network device. On the contrary, the terminal sends the second preamble, indicating that the storage area of the first HARQ process does not store the data to be sent. This is equivalent to that the terminal does not send the first indication information.

It can be understood that, in the case where uplink dynamic grant-free transmission supports multiple HARQ processes, the indication information for indicating that the storage area of other HARQ processes stores data to be sent may refer to the implementation of the first indication information.

Based on the technical solution shown in FIG. 5 , in the case where the uplink dynamic grant-free transmission falls back to the random access process, the terminal is in the storage area of the HARQ process (ie, the first HARQ process) used in the non-random access process. Stores packets that were not successfully transmitted. In this way, it is avoided that the physical layer of the terminal loses the data packet. Therefore, after the random access procedure is completed, the terminal can send the data packet without waiting for the upper layer to retransmit the data packet to the physical layer, thereby reducing the transmission delay of the data packet.

It can be understood that, in order to realize the above functions, the terminal includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that, in conjunction with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in hardware, or in a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the terminal may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. The following is an example of dividing each function module corresponding to each function to illustrate:

As shown in FIG. 6 , it is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The communication device includes a communication unit 301 and a processing unit 302 . Wherein, the communication unit 301 is used to support the communication device to perform steps S301 and S303 in FIG. 5 , and/or other processes used in the technical solutions described herein. The processing unit 302 is configured to support the communication device to perform step S302 in FIG. 5 , and/or other processes for the technical solutions described herein. All relevant contents of the steps involved in the foregoing method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

In this embodiment of the present application, the processing unit 302 is configured to perform a random access procedure, including: the processing unit 302 is configured to generate a message (for example, Msg1, Msg3), and control the communication unit 301 to send a message (for example, Msg1, Msg3); and, Decodes messages received by the communication unit 301 (eg Msg2, Msg4).

In this embodiment of the present application, during the random access process, the communication unit 301 is configured to send messages (eg, Msg1, Msg3) generated by the processing unit 302, and receive messages (eg, Msg2, Msg4) delivered by the network device.

As an example, in conjunction with the terminal shown in FIG. 4 , the communication unit 301 in FIG. 6 may be implemented by the transceiver 103 in FIG. 4 , the processing unit 302 in FIG. 6 may be implemented by the processor 101 in FIG. 4 , This embodiment of the present application does not impose any limitation on this.

Embodiments of the present application also provide a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium; when the computer-readable storage medium runs on the terminal shown in FIG. 4 , the terminal is made to execute The data transmission method shown in Figure 5. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state disks (SSDs)), and the like.

Embodiments of the present application further provide a chip, which includes a processing module and a communication interface, where the communication interface is used to receive an input signal and provide it to the processing module, and/or to process and output a signal generated by the processing module. The processing is used to support the terminal to perform the data transmission method shown in FIG. 5 . In one embodiment, the processing module may execute code instructions to perform the data transmission method shown in FIG. 5 . The code instruction can come from a memory inside the chip or from a memory outside the chip. The processing module is a processor, a microprocessor or an integrated circuit integrated on the chip. The communication interface can be an input-output circuit or a transceiver pin.

The embodiment of the present application also provides a computer program product including computer instructions, which, when running on the terminal shown in FIG. 3 , enables the terminal to execute the data transmission method shown in FIG. 5 .

The terminal, computer storage medium, chip, and computer program product provided by the above-mentioned embodiments of the present application are all used to execute the method for license-free transmission provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the method provided above. The corresponding beneficial effects will not be repeated here.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made therein without departing from the spirit and scope of the application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims, and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (20)

1. A data transmission method, characterized in that the method comprises:

   The terminal uses the configuration authorization resource to send data packets to the network device;

   Under the condition that the preset condition is satisfied, the terminal stores the data packet in the storage area of the first HARQ process of HARQ process, and executes the random access process; wherein, the first HARQ process is different from the first HARQ process. Two HARQ processes, the second HARQ process is the HARQ process used in the random access process;

   After completing the random access procedure, the terminal transmits the data packet.
2. The data transmission method according to claim 1, wherein the terminal sends a data packet to a network device using a configuration authorization resource, comprising:

   The terminal uses the configuration authorization resource corresponding to the target HARQ process to send the data packet to the network device; wherein the target HARQ process is the first HARQ process or the second HARQ process.
3. The data transmission method according to claim 1 or 2, wherein the preset conditions include one or more of the following:

   The terminal has not received the feedback information of the data packet from the network device within a first preset time period;

   The terminal does not receive the feedback information of the target HARQ process from the network device within a second preset time period;

   The terminal receives the indication information sent by the network device, where the indication information is used to instruct the terminal to perform a random access procedure.
4. The data transmission method according to any one of claims 1 to 3, wherein the terminal transmitting the data packet comprises:

   The terminal retransmits the data packet by using the configuration authorization resource corresponding to the first HARQ process or the configuration authorization resource corresponding to the third HARQ process.
5. The data transmission method according to claim 4, wherein the configuration grant resource corresponding to the third HARQ process is earlier than the configuration grant resource corresponding to the first HARQ process in the time domain.
6. The data transmission method according to any one of claims 1 to 3, wherein the terminal transmitting the data packet comprises:

   The terminal transmits the data packet by using the uplink transmission resource indicated by the received downlink control information DCI.
7. The data transmission method according to claim 6, wherein the DCI further includes an index value of the modulation and coding scheme MCS, and the transport block size TBS corresponding to the index value of the MCS is equal to the TBS of the data packet.
8. The data transmission method according to claim 6 or 7, wherein before the terminal transmits the data packet, the method further comprises:

   sending, by the terminal, first indication information to the network device, where the first indication information is used to indicate that the data packet is stored in the storage area of the first HARQ process;

   The terminal receives the DCI sent by the network device.
9. The data transmission method according to claim 8, wherein,

   If the random access process is a four-step random access process, the first indication information is carried in message 3; or,

   If the random access process is a two-step random access process, the first indication information is carried in message A.
10. A communication device, comprising:

    a communication unit, configured to send a data packet to the network device using the configuration authorization resource;

    a processing unit, configured to store the data packet in the storage area of the first HARQ process under the condition that a preset condition is met, and perform a random access process; wherein the first HARQ process is different from the second HARQ process , the second HARQ process is the HARQ process used in the random access process;

    The communication unit is further configured to transmit the data packet after the random access procedure is completed.
11. The communication device according to claim 10, wherein:

    The communication unit is specifically configured to use the configuration authorization resource corresponding to the target HARQ process to send the data packet to the network device; wherein the target HARQ process is the first HARQ process or the second HARQ process.
12. The communication device according to claim 10 or 11, wherein the preset conditions include one or more of the following:

    The communication apparatus does not receive the feedback information of the data packet from the network device within a first preset time period;

    The communication apparatus does not receive the feedback information of the target HARQ process from the network device within a second preset time period;

    The communication apparatus receives the indication information sent by the network device, where the indication information is used to instruct the terminal to perform a random access procedure.
13. The communication device according to any one of claims 10 to 12, wherein:

    The communication unit is specifically configured to use the configuration authorization resource corresponding to the first HARQ process or the configuration authorization resource corresponding to the third HARQ process to retransmit the data packet.
14. The communication apparatus according to claim 13, wherein the configuration grant resource corresponding to the third HARQ process is earlier than the configuration grant resource corresponding to the first HARQ process in the time domain.
15. The communication device according to any one of claims 10 to 12, wherein:

    The communication unit is specifically configured to transmit the data packet by using the uplink transmission resource indicated by the received downlink control information DCI.
16. The communication device according to claim 15, wherein the DCI further includes an index value of the MCS, and the TBS corresponding to the index value of the MCS is equal to the TBS of the data packet.
17. The communication device according to claim 15 or 16, characterized in that:

    The communication unit is further configured to send first indication information to the network device, where the first indication information is used to indicate that the data packet is stored in the storage area of the first HARQ process; of the DCI.
18. The communication device according to claim 17, wherein,

    If the random access process is a four-step random access process, the first indication information is carried in message 3 or uplink control information; or,

    If the random access process is a two-step random access process, the first indication information is carried in message A or uplink control information.
19. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the steps as claimed in claims 1 to 1. 9. The data transmission method of any one.
20. A chip, characterized in that it includes a processor, and the processor is configured to execute a computer program, so that the processor implements the data transmission method according to any one of claims 1 to 9.

Images