WO2019014988A1

WO2019014988A1 - Data transmission method, network device and terminal device

Info

Publication number: WO2019014988A1
Application number: PCT/CN2017/096907
Authority: WO
Inventors: 韩云博; 庄宏成; 丁志明
Original assignee: 华为技术有限公司
Priority date: 2017-07-17
Filing date: 2017-08-10
Publication date: 2019-01-24
Also published as: CN109906660A; CN109906660B

Abstract

The application provides a data transmission method, a network device, and a terminal device. The method comprises: the network device sends uplink scheduling information to the terminal device, wherein the uplink scheduling information comprises a sending NDI value, wherein the sending NDI value is determined by a reference NDI value, the reference NDI value is determined by the network device according to a preset NDI configuration manner; alternatively, the sending NDI value is determined by the network device according to the preset NDI configuration manner; the network device receives first data sent by the terminal device according to the sending NDI value; the network device sends a response message to the terminal device, wherein the response message is used to notify the terminal device whether the network device correctly receives the first data. The method can ensure that the reference NDI value and/or the sending NDI value of the network device and the terminal device are consistent after an unlicensed transmission mode is changed to an authorization-based transmission mode, thereby ensuring normal data transmission.

Description

Data transmission method, network device and terminal device

Technical field

The present application relates to communication technologies, and in particular, to a data transmission method, a network device, and a terminal device.

Background technique

In a mobile communication system, a terminal device may send uplink data to a network device after completing random access and a series of signaling processes. The terminal device transmits a new data for the first time as the initial transmission. If the network device cannot successfully demodulate the data sent by the terminal device, the terminal device performs retransmission based on a certain retransmission mode. For example, the terminal device can perform retransmission using a Hybrid Automatic Repeat Request (HARQ) mechanism. Specifically, when the network device cannot successfully demodulate the data sent by the terminal device, the data is not simply discarded, but the negative acknowledgement (NACK) message is sent to the terminal device, and the terminal device retransmits after receiving the NACK message. The network device combines the original erroneous data with the newly received retransmission data and then demodulates it.

In the prior art, the network device instructs the terminal device to perform initial transmission or retransmission by sending an uplink grant (UL Grant) message. Specifically, the network device carries a 1-bit New Data Indicator (NDI) in the UL Grant message, and the terminal device determines the initial transmission or the retransmission according to whether the NDI value changes according to the NDI value in the previous transmission. .

However, the prior art method is not suitable for a 5G communication system, and cannot meet the needs of data transmission or retransmission in a 5G communication system.

Summary of the invention

The present application provides a data transmission method, a network device, and a terminal device, and the technical solution is as follows.

A first aspect of the present application provides a data transmission method, the method comprising:

The network device sends uplink scheduling information to the terminal device, where the uplink scheduling information includes sending an NDI value, where the sending NDI value is determined by a reference NDI value, where the reference NDI value is determined by the network device according to a preset NDI The configuration mode is determined; or the sending NDI value is determined by the network device according to a preset NDI configuration manner;

Further, the network device receives the first data that is sent by the terminal device according to the sending NDI value, where the first data is transmitted by using a first transmission manner, and before the sending, by the terminal device, the first data When the data is transmitted by using the second transmission mode, where the first transmission mode is an authorization-based transmission mode, and the second transmission mode is an unauthorized transmission mode;

Further, the network device sends a response message to the terminal device, where the response message is used to notify the terminal device whether the network device correctly receives the first data.

In the method, the network device and the terminal device determine the reference NDI value and/or the NDI value based on the preset configuration manner, thereby ensuring that the network device and the terminal device are configured after the unauthorized transmission mode is changed to the authorization-based transmission mode. The reference NDI value and/or the transmitted NDI value are kept consistent to ensure normal data transmission.

In a possible design, before the network device sends the uplink scheduling information to the terminal device, the method further includes:

The network device sends an NDI configuration manner to the terminal device, so that the reference NDI value determined by the terminal device according to the NDI configuration manner is consistent with a reference NDI value determined by the network device, or the terminal device is configured according to the The sending NDI value parsed by the NDI configuration manner is consistent with the sending NDI value determined by the network device, and the terminal device determines, according to the NDI configuration manner, whether the NDI inversion is performed and the network device according to the The NDI configuration mode determines whether the result of NDI flipping is consistent.

In a possible design, the NDI is configured to: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value;

The NDI configuration mode is sent by the network device to the terminal device through a first message in advance.

When the uplink transmission mode used by the terminal device changes from the second transmission mode to the first transmission mode, the network device sends a second message to the terminal device, where the second message includes The NDI configuration method;

The NDI configuration mode is: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value.

In a possible design, the reference NDI value is determined according to an NDI value corresponding to a last data transmitted by the terminal device when the first transmission mode is used before transmitting the first data.

In a possible design, when the terminal device sends data by using the second transmission mode, the network device determines the reference NDI value according to the type of the unlicensed transmission resource used by the terminal device, where The type of the unlicensed transmission resource is a dedicated resource or a shared resource.

In a possible design, the network device determines the reference NDI value according to the type of the unlicensed transmission resource used by the terminal device, including:

If the network device receives the uplink data sent by the terminal device in the dedicated resource, the network device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new Said reference NDI value;

And if the network device receives the uplink data sent by the terminal device in the shared resource, the network device keeps the reference NDI value unchanged.

In a possible design, when the terminal device sends data by using the second transmission mode, the network device determines the reference NDI value according to information of a demodulation reference signal used by the terminal device.

In a possible design, the network device determines the reference NDI value according to the information of the demodulation reference signal used by the terminal device, including:

If the demodulation reference signal used by the terminal device is the first preset demodulation reference signal, the network device inverts the bit value corresponding to the reference NDI value, and uses the inverted bit value as New reference NDI value;

If the demodulation reference signal used by the terminal device is the second preset demodulation reference signal, the network device keeps the reference NDI value unchanged.

In a possible design, when the terminal device uses the second transmission mode to send data, the network device according to the indication information in the first trigger message sent by the terminal device to the network device before sending the data, Determining the reference NDI value, where the indication information is used to indicate that the data sent by the terminal device after the first trigger message is initial transmission data or retransmission data.

In a possible design, when the terminal device sends data by using the second transmission mode, the network device determines the reference NDI value according to whether the terminal device sends a second trigger message before transmitting the data.

In a possible design, the determining, by the network device, the reference NDI value according to whether the terminal device sends a second trigger message before sending the data, including:

If the network device receives the second trigger message, the network device determines that the data sent by the terminal device after the second trigger message is initial data, and the network device uses the reference NDI value. The corresponding bit value is flipped, and the inverted bit value is taken as the new reference NDI value.

If the network device instructs the terminal device to send the initial data, the network device inverts the bit value corresponding to the reference NDI value, and uses the inverted bit value as the sending NDI value;

And if the network device instructs the terminal device to send retransmission data, the network device uses the reference NDI value as the sending NDI value.

A second aspect of the present application provides a data transmission method, the method comprising:

Receiving, by the terminal device, uplink scheduling information sent by the network device, where the uplink scheduling information includes sending a new data indicating an NDI value;

Further, the terminal device sends the first data to the network device according to the reference NDI value and the sending NDI value, where the sending NDI value is parsed according to the reference NDI value, where the reference NDI value is The terminal device is determined according to a preset NDI configuration manner;

Or the terminal device sends the first data to the network device according to the sending the NDI value, where the sending NDI value is determined by the network device according to a preset NDI configuration manner;

Further, the terminal device receives a response message sent by the network device, where the response message is used to notify the terminal device whether the network device correctly receives the first data;

The first data is transmitted by using the first transmission mode, and the terminal device uses the second transmission mode for transmitting the previous data of the first data, where the first transmission mode is based on authorization. The transmission mode, the second transmission mode is an unauthorized transmission mode.

In the method, the network device and the terminal device determine the reference NDI value and/or the NDI value based on the preset configuration manner, thereby ensuring the network device and the terminal device after transitioning from the unauthorized transmission mode to the authorization-based transmission mode. The reference NDI value and/or the transmitted NDI value are consistent to ensure normal data transmission.

In a possible design, before the terminal device receives the uplink scheduling information sent by the network device, the terminal device further includes:

Receiving, by the terminal device, an NDI configuration manner sent by the network device, so that the reference NDI value determined by the terminal device according to the NDI configuration manner is consistent with a reference NDI value determined by the network device, or the terminal device And the sending NDI value that is parsed according to the NDI configuration manner is consistent with the sending NDI value determined by the network device, and the terminal device determines, according to the NDI configuration manner, whether the NDI inversion is performed, and the network device according to the The NDI configuration mode determines whether the result of NDI flipping is consistent.

The uplink transmission mode used by the terminal device changes from the second transmission mode to the first transmission mode Receiving, by the terminal device, the second message sent by the network device, where the second message includes the NDI configuration mode;

In a possible design, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the transmission data for initial transmission or retransmission, and according to the transmission data, The initial transmission or the retransmission sends data on the unlicensed transmission resource, where the unlicensed transmission resource includes at least a dedicated resource and a shared resource.

In a possible design, the terminal device determines the reference NDI value according to the sending data as the initial transmission or the retransmission, and sends the data on the unlicensed transmission resource according to the initial or retransmission of the transmission data. include:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and Transmitting data in the dedicated resource;

If the data sent by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and sends data in the shared resource.

In a possible design, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the transmission data for initial transmission or retransmission, and according to the transmission data, Initial transmission or retransmission, determining the information of the demodulation reference signal used when transmitting data.

In a possible design, the terminal device determines the reference NDI value according to the transmission data as the initial transmission or the retransmission, and determines the demodulation used when transmitting the data according to the initial or retransmission of the transmission data. Information about the reference signal, including:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and The first preset demodulation reference signal is used when transmitting data;

If the data sent by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and uses a second preset demodulation reference signal when transmitting data.

In a possible design, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the transmission data for initial transmission or retransmission, and before sending the data. Sending a first trigger message to the network device, where the first trigger message includes indication information, where the indication information is used to indicate that the data sent by the terminal device after the first trigger message is initial data or retransmission data.

In a possible design, when the terminal device sends data by using the second transmission manner, determining the reference NDI value according to the transmission data for initial transmission or retransmission, and according to the transmission data, is initial transmission or heavy Pass, determine whether to send the second trigger message before sending the data.

In a possible design, the determining the reference NDI value according to the sending data is initial transmission or retransmission, and determining whether to send the second trigger message before sending the data according to the initial or retransmission of the sending data. ,include:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and The second trigger message is sent before the data is sent.

In a possible design, the terminal device sends the first data to the network device according to the reference NDI value and the sending NDI value, including:

And if the reference NDI value is different from the sending NDI value, the terminal device sends the first data that is initially transmitted to the network device;

And if the reference NDI value is the same as the sending NDI value, the terminal device sends the retransmitted first data to the network device.

In a possible design, the network device sends the NDI configuration mode to the mobile terminal by using a system message, or a broadcast message, or a radio resource control RRC message, or a physical control message.

In one possible design, the first message is a system message or a radio resource control RRC message.

In a possible design, the second message is an RRC message or a physical control message.

A third aspect of the present application provides a network device having the function of implementing the network device in the first aspect. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the network device may include a receiving module, a processing module, and a sending module, where the modules may perform corresponding functions in the foregoing methods, for example, a sending module, configured to send uplink scheduling information to the terminal device, where The uplink scheduling information includes sending an NDI value. And a processing module, configured to determine a reference NDI value according to a preset NDI configuration manner, and determine the sending NDI value according to the reference NDI value, and configured to determine the sending NDI value according to a preset NDI configuration manner. And a receiving module, configured to receive, by the terminal device, the first data that is sent according to the sending the NDI value.

A fourth aspect of the present application provides a terminal device, where the terminal device has the function of implementing the terminal device in the second aspect. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the terminal device may include a receiving module, a processing module, and a sending module, where the modules may perform corresponding functions in the foregoing methods, for example, a receiving module, configured to receive uplink scheduling information sent by the network device, where The uplink scheduling information includes sending an NDI value. And a processing module, configured to determine a reference NDI value according to a preset NDI configuration manner, and determine the sending NDI value according to a preset NDI configuration manner. And a sending module, configured to send the first data to the network device according to the reference NDI value and the sending NDI value; or send the first data to the network device according to the sending the NDI value.

A fifth aspect of the present application provides a network device, where the network device includes one or more processors, a memory, a transceiver, and a bus; the one or more processors, transceivers, and memories communicate with each other through the bus; a transceiver for receiving and transmitting data; the memory for storing instructions; the one or more processors for executing the instructions in the memory, performing the method of the first aspect and various embodiments thereof .

A sixth aspect of the present application provides a terminal device, where the terminal device includes one or more processors, a memory, a transceiver, and a bus; the one or more processors, transceivers, and memories communicate with each other through the bus; a transceiver for receiving and transmitting data; the memory for storing instructions; the one or more processors for executing the instructions in the memory, performing the second aspect and methods thereof .

A seventh aspect of the present application provides a non-volatile storage medium having one or more program codes stored therein, the network device executing the network in the first aspect when the network device executes the program code Related method steps performed by the device.

An eighth aspect of the present application provides a non-volatile storage medium, where the non-volatile storage medium stores one or more program codes, wherein when the terminal device executes the program code, the terminal device executes the network in the second aspect. Related method steps performed by the device.

DRAWINGS

1 is a schematic diagram of determining an initial transmission or a retransmission according to an NDI in an existing LTE communication system;

2 is an interaction flowchart of Embodiment 1 of a data transmission method provided by the present application;

Figure 3 is a schematic illustration of a first alternative embodiment;

Figure 4 is a schematic view of a second alternative embodiment;

Figure 5 is a schematic view of a fourth alternative embodiment;

Figure 6 is a schematic view of a fifth alternative embodiment;

Figure 7 is a schematic illustration of a first alternative embodiment;

Figure 8 is a schematic view of a second alternative embodiment;

9 is a schematic flow chart of a first alternative embodiment;

10 is a block diagram of a network device provided by the present application;

11 is a block diagram of a terminal device provided by the present application;

12 is a physical block diagram of a network device provided by the present application;

FIG. 13 is a physical block diagram of a terminal device provided by the present application.

Detailed ways

It should be understood that the term "and/or" as used herein is merely an association describing the associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, while A and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

In the existing Long Term Evolution (LTE) communication system, the data transmission mode is an authorization-based transmission mode, that is, the terminal device must receive the UL Grant (uplink scheduling) from the network device before performing the initial transmission. Uplink Grant) information used to indicate the resources, modulation and coding schemes used by the terminal device for initial transmission. At the same time, a 1-bit NDI is also carried in the UL Grant, and the NDI can be used to indicate whether the scheduled data is initial or retransmitted. Specifically, when the network device fills in the NDI in the UL Grant, the NDI value of the UL Grant in the same HARQ process number transmission is reversed (that is, the NDI value is different), indicating that the network device wants the terminal device to perform the initial transmission. The reverse indicates that the network device wants the terminal device to retransmit.

1 is a schematic diagram of determining an initial transmission or a retransmission according to an NDI in an existing LTE communication system. As shown in FIG. 1, an NDI in a previous UL Grant (ie, UG1) of a specific HARQ process number is 1, if the terminal device is currently If the NDI value in the received UL Grant (that is, UG2) is 0, the terminal device should perform initial transmission. If the NDI in the UG2 currently received by the terminal device is 1, the terminal device should perform retransmission. If the terminal device receives a NACK and does not receive the UL Grant, the UE performs retransmission using the same resource and the same transmission format as the previous transmission, that is, non-adaptive retransmission. In summary, before the next transmission occurs, both the network device and the terminal device should clearly know the value of the NDI so that the network device and the terminal device can perform the initial transmission or retransmission correctly. In the LTE communication system, each time the terminal device first transmits, the network device will explicitly inform the terminal through the NDI in the UL Grant. In this case, the initial transmission should be performed at this time. Therefore, both the network device and the terminal device can clearly know what value the NDI should be.

In the 5G communication system, an unlicensed transmission method is introduced. In the method, the network device first divides one or more unlicensed transmission areas (GFTAs) for the terminal equipment, and the terminal equipment is not authorized. The uplink data is sent directly in the transmission area by using a specific transmission resource, and the UL Grant is not required to be sent on the network device. Therefore, the network device can no longer send the NDI to the terminal device through the UL Grant. The network device and the terminal device perform the NDI reversal according to their own judgment. When the terminal device changes from the unlicensed transmission mode to the traditional authorization-based transmission mode, The NDI in the first UL Grant sent by the network device may have an inconsistent understanding between the network device and the terminal device. For example, the network device wants the terminal device to perform retransmission, and the terminal device understands that the initial transmission is to be performed. This may result in an abnormality in data transmission.

The technical solution proposed by the present application aims to solve the above problems.

It should be noted that the authorization-based transmission mode and the unlicensed transmission mode described in the following embodiments are all the same HARQ process transmission, that is, the HARQ process number is the same.

The following describes the terminal device and the network device involved in the present application.

The terminal device may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to the terminal, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal The computers, for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), etc. . A wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point. Remote Terminal, Access Terminal, User Terminal, User Equipment, or User Agent.

The network device may specifically refer to a base station in the present application, and the base station may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface.

FIG. 2 is an interaction flowchart of Embodiment 1 of a data transmission method provided by the present application. As shown in FIG. 2, the method includes:

S201. The network device sends uplink scheduling information to the terminal device.

The uplink scheduling information includes sending an NDI value. The sending NDI value may be determined according to the reference NDI value, or the sending NDI value may also be directly determined according to a preset NDI configuration manner.

The specific meanings of the reference NDI value and the transmitted NDI value are described below.

As described above, in the authorization-based transmission mode, the network device carries a 1-bit NDI in the uplink scheduling information sent to the terminal device, to indicate whether the scheduled data is initial transmission or retransmission, and the 1-bit NDI That is, the above-mentioned transmission NDI value, that is, the NDI value carried in the uplink scheduling information.

In addition, for the network device and the terminal device, it is necessary to locally maintain an NDI value for reference, that is, the reference NDI value mentioned above, and the reference NDI value maintained by the network device and the terminal device needs to be always maintained. Consistently, the normal operation of the initial transmission or retransmission can be guaranteed. In the first case, for the network device, if the terminal device wants to send a new data, that is, the terminal device is required to perform the initial transmission, the network device flips the currently saved reference NDI value, and sends the inverted value as the transmission. The NDI is sent to the terminal device. At the same time, the network device also updates the reference NDI value to the inverted value to be used as the reference NDI value for the next data transmission. After the transmission NDI value is sent to the terminal device, the terminal device determines The sent NDI value is different from the saved reference NDI value, so it is determined that the initial transmission needs to be performed, so that the initial transmission is performed, and the terminal device needs to save the reference after receiving the response sent by the network device after receiving the data. The NDI value is updated to send the NDI value, that is, the inverted NDI value, as a reference for the next data transmission. In the second case, if the network device wants the terminal device to retransmit, the reference NDI value is not reversed, and the reference NDI value is directly sent to the terminal device as the sending NDI value. After receiving the NDI value, the terminal device determines to send the NDI. The value is the same as the reference NDI value saved by itself, so it is determined to retransmit. In this second case, both the network device and the terminal device keep the reference NDI value unchanged.

In summary, based on the above processing, in the authorization-based transmission mode, the network device and the terminal device can perform initial transmission and retransmission normally based on the reference NDI value that is always consistent. As described above, in the unlicensed transmission mode, the network device does not send the uplink scheduling information to the terminal device. Therefore, the network device and the terminal device may inconsistent when the reference NDI value is inverted, resulting in abnormal transmission. In the present application, both the network device and the terminal device can determine the reference NDI value based on the same preset configuration manner to ensure that the network device and the terminal device always keep the same for the reference NDI value. In addition, the network device and the terminal device may directly determine the transmit NDI value in the uplink scheduling information based on the same preset configuration manner, without relying on the existing reference NDI value. The specific manner will be described in detail in the following embodiments.

S202. The terminal device sends the first data to the network device according to the reference NDI value and the sending NDI value, or according to the sending NDI value.

Specifically, when the terminal device sends the first data according to the reference NDI value and the sent NDI value, the specific execution process may refer to the description in the foregoing step S201, and details are not described herein again, and the reference NDI value in the processing mode is based on The same preset configuration method on the network device side is determined.

When the terminal device directly sends the first data according to the sending NDI value, the sending NDI value is determined by the network device based on a specific configuration manner, and after receiving the sending NDI value, the terminal device may also understand based on the specific configuration manner. The NDI value is sent and the first data is sent based on the understood content.

The terminal device uses the second transmission mode, that is, the unlicensed transmission mode, when transmitting the previous data of the first data, and uses the first transmission mode, that is, the authorization based transmission mode, when transmitting the first data. That is, when the transmission mode is changed from the unlicensed transmission mode to the authorization-based transmission mode, the terminal device may send the first data according to the sending NDI value sent by the network device and the reference NDI value determined according to the preset configuration manner. .

S203. After receiving the first data, the network device sends a response message to the terminal device.

The response message is used to notify the terminal device whether the network device correctly receives the first data.

Specifically, if the network device successfully demodulates the first data, the network device sends an Acknowledgement (ACK) message to the terminal device, if the network device does not successfully demodulate the first data but knows that the first data is sent by the terminal device. The network device sends a Negative Acknowledge (NACK) message to the terminal device.

It should be noted that, if the first data is the initial transmission, the terminal device may update the original saved reference NDI value to the inverted reference NDI value after receiving the response message, that is, the terminal device may not send the first data. Just The reference NDI value is updated, but the reference NDI value is updated after receiving the response message to prevent the network device from updating the reference NDI value because the first data has not been received, and the terminal device has updated the reference NDI value.

In this embodiment, the network device and the terminal device determine the reference NDI value and/or the NDI value based on the preset configuration manner, thereby ensuring that the network device and the terminal are changed from the unlicensed transmission mode to the authorization-based transmission mode. The reference NDI value of the device and/or the transmitted NDI value are consistent to ensure normal data transmission.

Optionally, before performing step S201, the terminal device may further send uplink data request information to the network device to request uplink scheduling information from the network device, and further perform uplink data transmission in the first transmission mode. The uplink data request information may be a scheduling request (SR), or a buffer status report (BSR), or other information that can notify the network device that the terminal device wants to send uplink data of the first transmission mode. .

The following embodiments describe network devices and optional NDI configurations available to the terminal devices.

As described above, both the network device and the terminal device can determine the reference NDI value based on the same preset configuration manner to ensure that the network device and the terminal device always consistent in the flipping of the reference NDI value. In addition, the network device and the terminal device may directly determine the transmit NDI value in the uplink scheduling information based on the same preset configuration manner, without relying on the existing reference NDI value. The description is separately made below.

1. NDI configuration method for reference NDI value

In a first alternative embodiment, the reference NDI value is determined according to an NDI value corresponding to the last data transmitted by the terminal device when the first transmission mode is used before transmitting the first data.

Specifically, the network device and the terminal device use the sending NDI value in the last uplink scheduling information sent by the network device to the terminal device before performing the unlicensed transmission as the reference NDI value. During unlicensed transmission, whether it is an unlicensed transmission or a continuous multiple unlicensed transmission, the reference NDI values of the network equipment and the terminal equipment do not change regardless of whether the unlicensed transmission data is initial transmission or retransmission. After the network device and the terminal device are converted from the unlicensed transmission mode to the authorization-based transmission mode, if the network device wants the terminal device to perform the initial transmission, the network device flips the current reference NDI value, and uses the inverted value as the sending NDI. The value is sent in the uplink scheduling information and sent to the terminal device. If the network device wants the terminal device to perform retransmission, the sending NDI value in the uplink scheduling information sent by the network device to the terminal device is the current reference NDI value.

3 is a schematic diagram of a first optional implementation manner. As shown in FIG. 3, UG1 and GB1 respectively perform uplink scheduling information in a last authorization-based transmission mode performed before a network device and a terminal device perform unauthorized transmission. Upstream data, where the NDI value in UG1 is 1. Then, during a total of one unlicensed transmission (such as GF1 to GFi, i is a positive integer) continuously performed by the network device and the terminal device, the reference NDI values stored on the network device and the terminal device do not change. After the network device and the terminal device are converted from the unlicensed transmission mode to the authorization-based transmission mode, the NDI value in the UG2 sent by the network device to the terminal device is the NDI value in the UG1 value. If the GB2 is the initial transmission, Then the NDI value in UG2 is 0 (flip occurs); if GB2 is retransmitted, the NDI value in UG2 is 1 (no flipping occurs).

In a second optional implementation manner, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the sending data as the initial transmission or the retransmission, and according to the sending data, is the initial transmission or the retransmission. Transmitting data on the unlicensed transmission resource; accordingly, the network device determines the reference NDI value according to the type of the unlicensed transmission resource used by the terminal device.

The type of the unlicensed transmission resource is a dedicated resource or a shared resource.

Specifically, when the terminal device uses the unlicensed transmission mode, if the data sent by the terminal device is the initial transmission, the terminal device performs the bit value corresponding to the saved current reference NDI value after receiving the response message of the network device. Flip and use the inverted bit value as the new reference NDI value. And, optionally, if the data sent by the terminal device is an initial transmission, the terminal device sends the data on the dedicated resource. If the data transmitted by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and transmits the data in the shared resource.

Correspondingly, on the network device side, if the network device receives the uplink data sent by the terminal device in the dedicated resource, the network device flips the bit value corresponding to the saved current reference NDI value, and the bit value after the flipping is performed. As a new reference NDI value. If the network device receives the uplink data sent by the terminal device in the shared resource, the network device may obtain the retransmission data sent by the terminal device, and the network device keeps the reference NDI value unchanged.

4 is a schematic diagram of a second optional implementation manner. As shown in FIG. 4, the unlicensed transmission resources in the unlicensed transmission area include dedicated resources and shared resources, where dedicated resources are used for initial transmission and shared resources are used for Retransmission, if the terminal device wants to perform initial transmission, it uses dedicated resources for transmission. If the terminal device wants to retransmit, it uses shared resources for transmission. The network device can determine the current data according to which resource is received. Whether the transmission is an initial transmission or a retransmission, and then the reference NDI value is determined, thereby making it easy and convenient to determine the initial transmission or retransmission, and to determine the reference NDI value.

In a third optional implementation manner, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the sending data as the initial transmission or the retransmission, and, according to the sending data, is the initial transmission or the retransmission. , determining the information of the demodulation reference signal used when transmitting data. Accordingly, the network device determines the reference NDI value based on the information of the demodulation reference signal used by the terminal device.

Specifically, if the data sent by the terminal device is the initial transmission, the terminal device flips the bit value corresponding to the saved current reference NDI value after receiving the response message of the network device, and uses the inverted bit value as a new one. The NDI value is referenced, and the first preset demodulation reference signal is used when transmitting data. If the data transmitted by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and uses the second preset demodulation reference signal when transmitting the data.

Correspondingly, on the network device side, if the demodulation reference signal used by the terminal device is the first preset demodulation reference signal, the network device flips the bit value corresponding to the saved current reference NDI value, and will flip The subsequent bit value is used as the new reference NDI value. If the demodulation reference signal used by the terminal device is the second preset demodulation reference signal, the network device keeps the reference NDI value unchanged.

The terminal device may select different demodulation reference signals when transmitting data. In this embodiment, according to the preset configuration, the terminal device uses a specific demodulation reference signal to indicate initial transmission, and uses another specific The demodulation reference signal is used to indicate retransmission, and the network device also determines whether the data transmission is initial transmission or retransmission according to a specific reference demodulation signal based on a preset configuration.

In a fourth optional implementation manner, when the terminal device sends data by using the second transmission mode, the terminal device determines the reference NDI value according to the sending data as the initial transmission or the retransmission, and sends the data to the network device before sending the data. And a triggering message, where the first triggering message includes indication information, where the indication information is used to indicate that the data sent by the terminal device after the first triggering message is initial data or retransmitted data. Correspondingly, the network device determines the reference NDI value according to the indication information in the first trigger message sent by the terminal device to the network device before sending the data.

5 is a schematic diagram of a fourth optional implementation manner. As shown in FIG. 5, in an unlicensed transmission of a network device and a terminal device, the terminal device may send a trigger message (such as P1) before sending uplink data. The trigger message At least the identifier of the terminal device and the indication that the subsequent uplink data (such as U1) is the initial transmission or the retransmission, wherein the identifier of the terminal device can also use the time domain frequency domain resource and the reference demodulation signal used by the unlicensed data. To indicate. The trigger message may also carry control information of subsequent uplink data, such as a Modulation and Coding Scheme (MCS) and/or a data size. If the uplink data to be sent by the terminal device is the initial data, the triggering message (such as P1) indicates that the subsequent uplink data (such as U1) is the initial transmission, and after receiving the response message of the network device, the saved current data is saved. Referring to the bit value corresponding to the NDI value, the bit value is inverted, and the inverted bit value is used as the new reference NDI value; if the uplink data to be sent by the terminal device is retransmitted data, the subsequent message is indicated in the trigger message (such as P2). If the uplink data (such as U2) is retransmitted, the terminal device keeps the reference NDI value unchanged.

If the trigger message (such as P1) received by the network device indicates that the uplink data sent by the network device is the initial transmission, the network device flips the bit value corresponding to the saved current reference NDI value, and uses the inverted bit value as a new one. Referring to the NDI value, and sending a response message to the terminal device; if the trigger message (such as P2) received by the network device indicates that the subsequently sent uplink data is a retransmission, the network device keeps the reference NDI unchanged and sends a response to the terminal device. Message. It should be noted that the network device and the terminal device only need to flip the NDI value after receiving/transmitting the trigger message, and do not need to flip the NDI value after receiving/transmitting the uplink data.

Further, after the current transmission between the network device and the terminal device is changed from the unauthorized transmission mode to the authorization-based transmission mode, the network device uses the network device in the last unauthorized transmission data performed by the network device and the terminal device. The NDI value is used as the reference NDI value. If the data transmitted according to the authorized transmission mode is an initial transmission, the network device uses the NDI value that is inverted compared with the reference NDI value as the transmission NDI value in the uplink scheduling information; if the data transmitted based on the authorized transmission mode is a retransmission, Then the network device uses the same NDI value as the reference NDI value as the transmit NDI value in the uplink scheduling information.

In a fifth optional implementation manner, when the terminal device sends data by using the second transmission mode, determining a reference NDI value according to the sending data for initial transmission or retransmission, and determining, according to the sending data, an initial transmission or a retransmission, determining Whether to send a second trigger message before sending data. Correspondingly, the network device determines the reference NDI value according to whether the terminal device sends a second trigger message before transmitting the data.

Specifically, if the data sent by the terminal device is the initial transmission, the terminal device flips the bit value corresponding to the saved current reference NDI value after receiving the response message of the network device, and uses the inverted bit value as a new one. Reference NDI value, and send a second trigger message before sending data.

Correspondingly, on the network device side, if the network device receives the second trigger message, the network device determines that the data sent by the terminal device after the second trigger message is the initial data, and further, the network device corresponds to the reference NDI value. The value is flipped and the inverted bit value is taken as the new reference NDI value.

6 is a schematic diagram of a fifth optional implementation manner. As shown in FIG. 6, in an unlicensed transmission of a network device and a terminal device, the terminal device sends a trigger message to the network device before sending the initial data (such as P). In order to notify the network device that the terminal device plans to send uplink initial transmission data (such as U1) to the network device, and if the network device receives the trigger message, flip the current reference NDI value and use it as the sending NDI in the uplink scheduling information. If the network device receives the uplink data, the reference NDI value may not be flipped. Optionally, the trigger message is at least a preamble message, where the preamble message is used by the network device to identify a trigger message sent by the terminal device. After receiving the triggering message, the network device knows that the terminal device plans to perform the initial transmission, and then sends the response message and flips the reference NDI. If the network device receives the uplink data sent by the terminal device, the NDI value in the previous transmission is used as a reference. The NDI value remains unchanged at the same time as the NDI value. For the terminal device, if the terminal device scheduled to perform the initial transmission sends a trigger message and receives a response message from the network device, Then, the NDI value in the previous transmission is used as the reference NDI value, and the NDI value can be inverted; if the terminal device sends the uplink data, whether the initial data or the retransmitted data, the NDI value in the previous transmission is used as the reference NDI value. At the same time, you cannot flip the NDI value.

2. NDI configuration mode for sending NDI values

In this configuration mode, the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value. For example, the initial transmission corresponds to 1, and the retransmission corresponds to 0.

In a first optional implementation manner, the NDI configuration mode is sent by the network device to the terminal device in advance through the first message.

Optionally, the foregoing first message may be a system message or a Radio Resource Control (RRC) message. That is, the network device can deliver the NDI configuration mode to the terminal device in a static or semi-static manner.

FIG. 7 is a schematic diagram of a first alternative embodiment. As shown in FIG. 7 , after the network device and the terminal device are pre-configured to convert the unlicensed transmission mode into the authorization-based transmission mode, the network device sends the first to the terminal device. The value of the NDI value in the uplink scheduling information. If the NDI value in the first uplink scheduling information is 0, it represents the initial transmission. If the NDI value is 1, it represents the retransmission. The network device and the terminal device continuously perform i times of unauthorized transmission, and i is a positive integer. After the network device and the terminal device are converted from the unlicensed transmission mode to the authorization-based transmission mode, if the network device wants the terminal device to send the initial transmission uplink data, the network device sends the first uplink scheduling information to the terminal device (for example, The NDI value in UG1) is set to 0; if the network device wants the terminal device to send the retransmitted uplink data, the network device will set the NDI value in UG1 sent to the terminal device to 1.

It should be noted that the NDI values represented by the initial transmission and the retransmission in the first uplink scheduling information sent by the network device to the terminal device after the unlicensed transmission mode is changed to the authorization-based transmission mode may also be 1 and 0, respectively.

In a second optional implementation manner, when the uplink transmission mode used by the terminal device changes from the second transmission mode to the first transmission mode, the network device sends a second message to the terminal device, where the second message includes the NDI configuration mode.

In an example, the second message may be sent after the last response message sent by the network device to the terminal device in the second transmission mode before the network device sends the first uplink scheduling information to the terminal device; in another instance The second message may be the first uplink scheduling information sent by the network device to the terminal device. In another example, the second message may be the last response message sent by the network device to the terminal device in the second transmission mode. .

Optionally, the foregoing second message may be an RRC message or a physical control message.

FIG. 8 is a schematic diagram of a second alternative embodiment. As shown in FIG. 8, the network device and the terminal device continuously perform i times of unauthorized transmission, where i is a positive integer. After the network device and the terminal device are changed from the unauthorized transmission mode to the authorization-based transmission mode, the network device may send the NDI configuration information to the terminal device to configure the network device and the terminal device to change from the unlicensed transmission mode to the The value of the NDI value is used in the first uplink scheduling information (such as UG1) after the authorized transmission mode. For example, if the authorization-based transmission (GB1) is the initial transmission, the NDI value is set to 0 (or 1); if GB1 is For retransmission, the NDI value is set to 1 (if the initial NDI value is 1, the retransmission NDI value can be 0).

The following embodiments describe a specific method for a network device and a terminal device to obtain an NDI configuration mode.

In a first optional implementation manner, the network device may send an NDI configuration manner to the terminal device by using a specific message, so that the network device and the terminal device determine the reference NDI value and/or send the NDI value based on the same NDI configuration manner. .

9 is a schematic flowchart of a first optional implementation manner. As shown in FIG. 9, the process for a network device to send an NDI configuration mode to a terminal device is as follows:

S901 (optional), the terminal device sends a request for acquiring an NDI configuration mode to the network device.

This step is optional, that is, the network device can also actively send the NDI configuration mode to the terminal device.

S902. The network device sends an NDI configuration mode to the terminal device.

Specifically, the NDI configuration mode may be indicated by an index, for example, one or more possible NDI configuration manners are specified in the protocol, and the NDI configuration manner that the network device delivers to the terminal device may specifically indicate which should be used by using an index. NDI configuration method. Alternatively, the NDI configuration mode may also indicate whether it is used by using a capability switch. For example, the network device may enable the terminal device to use the NDI configuration mode by using a delivered message (such as Capability Enable), or by closing a message (such as Capability). Disable) to turn off the ability of the terminal device to use the NDI configuration mode.

Optionally, the network device may send the NDI configuration mode to the mobile terminal by using a system message, or a broadcast message, or an RRC message, or a physical control message.

For example, the network device may pass a message such as a Master Information Block (MIB), a System Information Block (SIB), or the network device may also pass RRC signaling or a MAC control element (Media Access Control Control Element). , MAC CE) sends the NDI configuration mode to the terminal device, or the network device can also send the NDI configuration mode to the terminal device through physical control signaling (L1 Signaling, L1 signaling), and the following line control information (Downlink Control Information, DCI) ). In addition, the network device can also send the NDI configuration mode through other broadcast messages or other types of messages.

S903 (optional), the terminal device sends a response message to the network device.

Specifically, the terminal device responds to the network device, and confirms that the NDI configuration mode has been received.

It should be noted that, when the network device sends the NDI configuration mode through the MIB or the SIB or other broadcast messages, the terminal device that receives the NDI configuration mode may not send a response message to the first device, that is, the step 903 may not exist.

In the second optional implementation manner, the foregoing NDI configuration mode may also be a fixed NDI configuration mode, and the network device and the terminal device may be processed according to the fixed NDI configuration manner.

For example, if a specific NDI configuration mode is specified in the protocol, the network device and the terminal device are processed according to the NDI configuration manner, so as to prevent the network device and the terminal device from being converted from an unauthorized transmission mode to an authorization-based transmission mode. NDI can't keep consistent issues.

In the above two optional implementation manners, the NDI configuration mode may not only make the reference NDI value determined by the terminal device according to the NDI configuration manner consistent with the reference NDI value determined by the network device, but also enable the terminal device to determine whether the NDI configuration mode is determined according to the NDI configuration manner. The result of performing the NDI flip is consistent with the result of the network device determining whether to perform the NDI flip according to the NDI configuration mode.

FIG. 10 is a block diagram of a network device according to the present application. As shown in FIG. 10, the network device includes:

The sending module 1001 is configured to send uplink scheduling information to the terminal device, where the uplink scheduling information includes sending an NDI value.

The processing module 1002 is configured to determine a reference NDI value according to a preset NDI configuration manner, and determine the sending NDI value according to the reference NDI value, and to determine the sending NDI value according to a preset NDI configuration manner.

The receiving module 1003 is configured to receive first data that is sent by the terminal device according to the sending NDI value, where the first data is transmitted by using a first transmission mode, and the terminal device is transmitting the first data. The previous data is transmitted by using a second transmission mode, where the first transmission mode is an authorization-based transmission mode, and the second transmission mode is an unauthorized transmission mode.

The sending module 1001 is further configured to send a response message to the terminal device, where the response message is used to notify the terminal device whether the network device correctly receives the first data.

For a detailed description of each module in the network device and the technical effects thereof, reference may be made to the foregoing method embodiments, and details are not described herein again.

11 is a block diagram of a terminal device provided by the present application. As shown in FIG. 11, the terminal device includes:

The receiving module 1101 is configured to receive uplink scheduling information sent by the network device, where the uplink scheduling information includes sending an NDI value.

The processing module 1102 is configured to determine a reference NDI value according to a preset NDI configuration manner, and determine the sending NDI value according to a preset NDI configuration manner.

The sending module 1103 is configured to send first data to the network device according to the reference NDI value and the sending NDI value, or send first data to the network device according to the sending NDI value, where the first The data is transmitted by using the first transmission mode, and the terminal device uses the second transmission mode to transmit the previous data of the first data, where the first transmission mode is an authorization-based transmission mode, The second transmission mode is an unauthorized transmission mode.

The receiving module 1101 is further configured to receive a response message sent by the network device, where the response message is used to notify the terminal device whether the network device correctly receives the first data.

12 is a physical block diagram of a network device provided by the present application. As shown in FIG. 12, the network device 1200 includes: one or more processors 1201, a memory 1202, a transceiver 1203, and a bus 1204. Among them, one or more processors 1201, a memory 1202, and a transceiver 1203 (including a transmitter and a receiver) are connected to each other through a bus 1204. The bus 1204 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The above bus 1204 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.

The present application also provides a non-volatile storage medium having one or more program codes stored therein. When the processor 1201 of the base station 1200 executes the program code, the base station 1200 performs the foregoing application of the present application. Related method steps performed by the network device in any of the method embodiments.

The detailed description of each module or unit in the base station 1200 provided by the present application and the technical effects of the related method steps performed by the base station in the method embodiment of the present application may be referred to the method embodiment of the present application. The related descriptions are not repeated here.

FIG. 13 is a physical block diagram of a terminal device provided by the present application. As shown in FIG. 13, the terminal device 1300 includes: one or more processors 1301, a memory 1302, a transceiver 1303, and a bus 1304. Among them, one or more processors 1301, a memory 1302, and a transceiver 1303 (including a transmitter and a receiver) are connected to each other through a bus 1304. The bus 1304 can be a PCI bus or an EISA bus. Bus 1304 can be divided into address bus, total data Line, control bus, etc. For ease of representation, only one thick line is shown in FIG. 13, but it does not mean that there is only one bus or one type of bus.

The present application also provides a non-volatile storage medium having one or more program codes stored therein. When the processor 1301 of the terminal device 1300 executes the program code, the terminal device 1300 executes the present application. Related method steps performed by the terminal device in any of the foregoing method embodiments.

The detailed description of each module in the terminal device 1300 provided by the present application and the technical effects of the related method steps performed by the UE in the method embodiment of the present application may be referred to in the method embodiment of the present application. Description, no longer repeat here.

Claims

A data transmission method, comprising:

The network device sends uplink scheduling information to the terminal device, where the uplink scheduling information includes sending a new data indicating an NDI value; the sending NDI value is determined by a reference NDI value, where the reference NDI value is determined by the network device according to a preset NDI The configuration mode is determined; or the sending NDI value is determined by the network device according to a preset NDI configuration manner;

Receiving, by the network device, the first data sent by the terminal device according to the sending NDI value, where the first data is transmitted by using a first transmission manner, and the terminal device is transmitting the previous data of the first data And transmitting by using the second transmission mode, where the first transmission mode is an authorization-based transmission mode, and the second transmission mode is an unauthorized transmission mode;

The network device sends a response message to the terminal device, where the response message is used to notify the terminal device whether the network device correctly receives the first data.
The method according to claim 1, wherein before the network device sends the uplink scheduling information to the terminal device, the method further includes:

The network device sends an NDI configuration manner to the terminal device, so that the reference NDI value determined by the terminal device according to the NDI configuration manner is consistent with a reference NDI value determined by the network device, or the terminal device is configured according to the The sending NDI value parsed by the NDI configuration manner is consistent with the sending NDI value determined by the network device, and the terminal device determines, according to the NDI configuration manner, whether the NDI inversion is performed and the network device according to the The NDI configuration mode determines whether the result of NDI flipping is consistent.
The method according to claim 1 or 2, wherein the NDI is configured to: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value;

The NDI configuration mode is sent by the network device to the terminal device through a first message in advance.
The method according to claim 1 or 2, wherein before the network device sends the uplink scheduling information to the terminal device, the method further includes:

When the uplink transmission mode used by the terminal device changes from the second transmission mode to the first transmission mode, the network device sends a second message to the terminal device, where the second message includes The NDI configuration method;

The NDI configuration mode is: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value.
The method according to claim 1 or 2, wherein the reference NDI value corresponds to a last data transmitted when the terminal device uses the first transmission mode before transmitting the first data. The NDI value is determined.
The method according to claim 1 or 2, wherein when the terminal device transmits data by using the second transmission mode, the network device determines the according to the type of the unlicensed transmission resource used by the terminal device. Referring to the NDI value, wherein the type of the unlicensed transmission resource is a dedicated resource or a shared resource.
The method according to claim 6, wherein the determining, by the network device, the reference NDI value according to a type of the unlicensed transmission resource used by the terminal device comprises:

If the network device receives the uplink data sent by the terminal device in the dedicated resource, the network device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new Said reference NDI value;

And if the network device receives the uplink data sent by the terminal device in the shared resource, the network device keeps the reference NDI value unchanged.
The method according to claim 1 or 2, wherein when the terminal device transmits data by using the second transmission mode, the network device determines, according to information of a demodulation reference signal used by the terminal device Refer to the NDI value.
The method according to claim 8, wherein the determining, by the network device, the reference NDI value according to the information of the demodulation reference signal used by the terminal device comprises:

If the demodulation reference signal used by the terminal device is the first preset demodulation reference signal, the network device inverts the bit value corresponding to the reference NDI value, and uses the inverted bit value as New reference NDI value;

If the demodulation reference signal used by the terminal device is the second preset demodulation reference signal, the network device keeps the reference NDI value unchanged.
The method according to claim 1 or 2, wherein when the terminal device transmits data by using the second transmission mode, the network device sends the first message to the network device according to the terminal device before transmitting data. The indication information in the trigger message is used to determine the reference NDI value, where the indication information is used to indicate that the data sent by the terminal device after the first trigger message is initial transmission data or retransmission data.
The method according to claim 1 or 2, wherein, when the terminal device transmits data by using the second transmission mode, the network device determines, according to whether the terminal device sends a second trigger message before transmitting data, Refer to the NDI value.
The method according to claim 11, wherein the determining, by the network device, the reference NDI value according to whether the terminal device sends a second trigger message before sending the data comprises:

If the network device receives the second trigger message, the network device determines that the data sent by the terminal device after the second trigger message is initial data, and the network device uses the reference NDI value. The corresponding bit value is flipped, and the inverted bit value is taken as the new reference NDI value.
The method according to any one of claims 5 to 12, wherein before the network device sends the uplink scheduling information to the terminal device, the method further includes:

If the network device instructs the terminal device to send the initial data, the network device inverts the bit value corresponding to the reference NDI value, and uses the inverted bit value as the sending NDI value;

And if the network device instructs the terminal device to send retransmission data, the network device uses the reference NDI value as the sending NDI value.
The method according to any one of claims 2 or 5, wherein the network device controls the RRC message or the physical control message to the mobile terminal by using a system message, or a broadcast message, or a radio resource. Send the NDI configuration mode.
The method according to claim 3, wherein the first message is a system message or a radio resource control RRC message.
The method according to claim 4, wherein the second message is an RRC message or a physical control message.
A data transmission method, comprising:

The terminal device receives uplink scheduling information sent by the network device, where the uplink scheduling information includes sending new data refers to Showing the NDI value;

Transmitting, by the terminal device, first data to the network device according to the reference NDI value and the sending NDI value, where the sending NDI value is parsed according to the reference NDI value, where the reference NDI value is used by the terminal The device is determined according to a preset NDI configuration manner;

Or the terminal device sends the first data to the network device according to the sending the NDI value, where the sending NDI value is determined by the preset NDI configuration manner;

Receiving, by the terminal device, a response message sent by the network device, where the response message is used to notify the terminal device whether the network device correctly receives the first data;

The first data is transmitted by using the first transmission mode, and the terminal device uses the second transmission mode for transmitting the previous data of the first data, where the first transmission mode is based on authorization. The transmission mode, the second transmission mode is an unauthorized transmission mode.
The method according to claim 17, wherein before the terminal device receives the uplink scheduling information sent by the network device, the method further includes:

Receiving, by the terminal device, an NDI configuration manner sent by the network device, so that the reference NDI value determined by the terminal device according to the NDI configuration manner is consistent with a reference NDI value determined by the network device, or the terminal device And the sending NDI value that is parsed according to the NDI configuration manner is consistent with the sending NDI value determined by the network device, and the terminal device determines, according to the NDI configuration manner, whether the NDI inversion is performed, and the network device according to the The NDI configuration mode determines whether the result of NDI flipping is consistent.
The method according to claim 17 or 18, wherein the NDI is configured to: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value;

The NDI configuration mode is sent by the network device to the terminal device through a first message in advance.
The method according to claim 17 or 18, wherein before the terminal device receives the uplink scheduling information sent by the network device, the method further includes:

When the uplink transmission mode used by the terminal device changes from the second transmission mode to the first transmission mode, the terminal device receives a second message sent by the network device, where the second message includes The NDI configuration mode;

The NDI configuration mode is: the initial transmission corresponds to the first preset value, and the retransmission corresponds to the second preset value.
The method according to claim 17 or 18, wherein the reference NDI value corresponds to a last data transmitted when the terminal device uses the first transmission mode before transmitting the first data. The NDI value is determined.
The method according to claim 17 or 18, wherein when the terminal device transmits data by using the second transmission mode, the terminal device determines the reference NDI value according to whether the transmission data is initial transmission or retransmission. And transmitting data on the unlicensed transmission resource according to the sending data as an initial transmission or a retransmission, where the unlicensed transmission resource includes a dedicated resource and a shared resource.
The method according to claim 22, wherein the terminal device determines the reference NDI value according to the transmission data for initial transmission or retransmission, and performs unauthorized transmission according to the transmission data for initial transmission or retransmission. Send data on the resource, including:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and The dedicated resource is issued Send data

If the data sent by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and sends data in the shared resource.
The method according to claim 17 or 18, wherein when the terminal device transmits data by using the second transmission mode, the terminal device determines the reference NDI value according to whether the transmission data is initial transmission or retransmission. And, based on the transmission data being the initial transmission or the retransmission, determining the information of the demodulation reference signal used when transmitting the data.
The method according to claim 24, wherein the terminal device determines the reference NDI value according to the transmission data as an initial transmission or a retransmission, and determines, when the transmission data is the initial transmission or the retransmission, The information of the demodulation reference signal used, including:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and The first preset demodulation reference signal is used when transmitting data;

If the data sent by the terminal device is a retransmission, the terminal device keeps the reference NDI value unchanged, and uses a second preset demodulation reference signal when transmitting data.
The method according to claim 17 or 18, wherein when the terminal device transmits data by using the second transmission mode, the terminal device determines the reference NDI value according to whether the transmission data is initial transmission or retransmission. And sending a first trigger message to the network device, where the first trigger message includes indication information, where the indication information is used to indicate data sent by the terminal device after the first trigger message. For initial data or retransmit data.
The method according to claim 17 or 18, wherein when the terminal device transmits data by using the second transmission mode, determining the reference NDI value according to the transmission data for initial transmission or retransmission, and according to The sending data is an initial transmission or a retransmission, and it is determined whether the second triggering message is sent before the data is sent.
The method according to claim 27, wherein the determining the reference NDI value according to the transmission data is initial transmission or retransmission, and determining whether the data is sent before the data is sent according to the initial or retransmission of the transmission data. Send a second trigger message, including:

If the data sent by the terminal device is an initial transmission, the terminal device inverts a bit value corresponding to the reference NDI value, and uses the inverted bit value as a new reference NDI value, and The second trigger message is sent before the data is sent.
The method according to any one of claims 21 to 28, wherein the terminal device sends the first data to the network device according to the reference NDI value and the sending NDI value, including:

And if the reference NDI value is different from the sending NDI value, the terminal device sends the first data that is initially transmitted to the network device;

And if the reference NDI value is the same as the sending NDI value, the terminal device sends the retransmitted first data to the network device.
The method according to any one of claims 18 or 21 to 29, wherein the network device controls the RRC message or the physical control message to the mobile terminal by using a system message, or a broadcast message, or a radio resource Send the NDI configuration mode.
The method according to claim 19, wherein the first message is a system message or a radio resource control RRC message.
The method according to claim 20, wherein the second message is an RRC message or a physical control message.
A network device, comprising:

One or more processors, memories, transceivers, and buses;

The one or more processors, transceivers, and memories communicate with each other through the bus;

The transceiver is configured to receive and send data;

The memory is for storing instructions;

The one or more processors are configured to execute the instructions in the memory to perform the method of any of claims 1-16.
A terminal device, comprising:

One or more processors, memories, transceivers, and buses;

The one or more processors, transceivers, and memories communicate with each other through the bus;

The transceiver is configured to receive and send data;

The memory is for storing instructions;

The one or more processors are configured to execute the instructions in the memory and perform the method of any of claims 1-16.