CN107113118B - Reply message transmission method and network device - Google Patents

Abstract

The embodiment of the invention provides response message transmission methods and network equipment, wherein the response message transmission methods comprise that the th network equipment sends a th data packet to the second network equipment, the th network equipment receives at least two response feedback messages of a th data packet sent by the second network equipment, the at least two response feedback messages are repeatedly arranged in a time domain, the at least two response feedback messages sequentially differ from each other in the time domain by preset repetition interval time, and the network equipment determines whether the th data packet is successfully sent according to the at least two response feedback messages.

Description

Reply message transmission method and network device

technical field

Embodiments of the present invention relate to the field of wireless communication technologies, and in particular, to a method for transmitting a reply message and a network device.

Background technique

With the development of IoT communication technology, the number of connections of machine-to-machine (M2M) communication devices is increasing dramatically. It is expected that by 2022, the number of M2M terminals will reach 50 billion. The business scenarios of M2M mainly include smart home/building, smart measurement (meter reading business), logistics tracking, environmental monitoring, smart agriculture and disaster alarm.

Such a massive M2M market has put forward new requirements for communication systems. First of all, the low cost of terminals is a necessary condition for the promotion of the massive M2M industry. As long as the cost of M2M terminals is low enough, or even so low that the cost factor can be ignored when deploying M2M terminals, the Internet of Everything can be truly achieved. In addition, with the rise of massive M2M, higher challenges are raised for the capacity of the communication system, and the communication network needs to support far more connections than Human to Human (H2H) communication. In addition, M2M terminals may be deployed in basements or other areas where wireless signals are difficult to reach, so communication networks are required to provide better coverage. For some M2M services deployed in the wild, such as forest fire alarms, stricter requirements are imposed on the standby time of M2M terminals, that is, M2M terminals are required to save more power. To sum up, the requirements of M2M services for terminals and networks can be summarized as: terminals with low cost, low power consumption, strong network coverage, and support for more users.

In order to cope with the above requirements in M2M communication, in the future communication system, there may be a new type of terminal that supports a narrower bandwidth, which can be called a narrowband terminal. The narrowband terminal has a low data transmission rate and simpler sending and receiving processing, which is beneficial to the low cost and low power consumption of the terminal. Under the same transmit power, a narrowband terminal has a higher power spectral density (Power Spectrum Density, PSD) than a terminal with a wider bandwidth, and can resist more transmission loss, thereby achieving the purpose of enhancing coverage. Under the condition of a given spectrum bandwidth, narrow-band terminals use a narrower frequency, so more terminals can communicate at the same time. Therefore, narrowband terminals meet the needs of M2M terminals with low cost, low power consumption, strong network coverage, and support for a larger number of users, and are a preferred solution for M2M terminals.

In a wireless communication system, the sender will pause every time a data packet is sent, waiting for an acknowledgment message from the receiver. When the data packet arrives at the receiving end, the receiving end detects it. If it is received correctly, the receiving end will return an Acknowledgement (ACK) message to the sending end. If the receiving end fails, the receiving end will return a Negative Acknowledgement (Negative Acknowledgement) message to the sending end , NACK) message. When the sender receives the ACK message, it will continue to send new data packets; when the sender receives the NACK message, it will resend the last transmitted data packet. The sender needs to determine when and how to send data packets according to the ACK/NACK message. Therefore, it is particularly important to improve the reliability of ACK/NACK message transmission.

At present, methods for improving the reliability of ACK/NACK message transmission mainly include repetition coding, repetition ACK/NACK, and the combination of the two. The method of repeated coding reduces the effectiveness of transmission, and the method of repeated ACK/NACK is to repeatedly send ACK/NACK messages on consecutive subframes for many times.

For a communication system using narrowband terminals, the spectrum bandwidth of the system is usually very narrow, and sufficient frequency diversity gain cannot be obtained through frequency modulation. Therefore, obtaining sufficient time diversity gain is crucial to improve transmission reliability. The narrowband terminal is generally applied in a static environment or a low-speed moving environment, and the moving rate is low, and its Doppler frequency shift is low. The lower the Doppler frequency shift, the longer the corresponding channel coherence time. The current method to improve the reliability of ACK/NACK message transmission adopts continuous time repetition. For narrowband terminal systems with long channel coherence time, sufficient time diversity gain cannot be obtained, or it takes longer time to obtain sufficient time diversity. Diversity gain.

Therefore, how to improve the reliability of ACK/NACK message transmission in a communication system using narrowband terminals is an urgent problem to be solved at present.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and network device for transmitting a response message, which improve the time diversity gain of the response feedback message, thereby improving the reliability of the response feedback message.

A first aspect provides a network device, the network device is a first network device, and the network device includes:

a sending module, configured to send the first data packet to the second network device;

a receiving module, configured to receive at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages The feedback messages sequentially differ by a preset repetition interval in the time domain;

A processing module, configured to determine whether the first data packet is sent successfully according to the at least two response feedback messages.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the at least two response feedback messages are repeatedly set in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, Transport block repetition, frame repetition.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the number of the response feedback messages and/or the preset repetition interval time length is the same as the The coverage capability of the second network device corresponds.

With reference to the second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, the number of the response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition The interval time length is proportional to the coverage capability of the second network device.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the receiving module is further configured to receive the second network device before the sending module sends the first data packet to the second network device The sent first DCI, where the first DCI includes transmission resource configuration information of the first data packet;

The sending module is specifically configured to send the first data packet to the second network device on the transmission resource indicated by the first DCI;

The receiving module is specifically configured to sequentially receive the second DCI and at least one third DCI sent by the second network device, wherein the second DCI and the at least one third DCI respectively include the first data packet response feedback message.

With reference to the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner of the first aspect, the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK in the third DCI repeats field carries the reply feedback message.

With reference to the fourth or fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, between the first DCI, the second DCI, and the at least one third DCI They are separated by at least one preset DCI interval time respectively.

With reference to the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect, the number of the third DCI and/or the preset DCI interval time length is the same as that of the second network. The coverage capability of the device corresponds.

With reference to the seventh possible implementation manner of the first aspect, in the eighth possible implementation manner of the first aspect, the number of the third DCI is proportional to the coverage capability of the second network device, and the preset The length of the DCI interval is proportional to the coverage capability of the second network device.

With reference to any one possible implementation manner of the first aspect to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the response feedback message includes an ACK message or a NACK message;

The processing module is specifically configured to determine that the first data packet is successfully sent according to at least two ACK messages, or determine that the first data packet has failed to be sent according to at least two NACK messages, and determine to retransmit the first data packet .

A second aspect provides a network device, where the network device is a second network device, and the network device includes:

a receiving module, configured to receive the first data packet sent by the first network device;

a processing module, configured to determine whether the first data packet is received normally;

a sending module, configured to send at least two response feedback messages of the first data packet to the first network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages The messages are sequentially separated by a preset repetition interval in the time domain.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the at least two response feedback messages are repeatedly set in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, Transport block repetition, frame repetition.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the number of the response feedback messages and/or the preset repetition interval time length is the same as the The coverage capability of the second network device corresponds.

With reference to the second possible implementation manner of the second aspect, in the third possible implementation manner of the second aspect, the number of the response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition The interval time length is proportional to the coverage capability of the second network device.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the sending module is further configured to send the first network device to the first network device before the receiving module receives the first data packet sent by the first network device sending a first DCI, where the first DCI includes transmission resource configuration information of the first data packet;

The receiving module is specifically configured to receive the first data packet sent by the first network device on the transmission resource indicated by the first DCI;

The sending module is specifically configured to send a second DCI and at least one third DCI to the first network device in sequence, wherein the second DCI and the at least one third DCI respectively include the data of the first data packet. Respond to feedback messages.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK in the third DCI repeats field carries the reply feedback message.

With reference to the fourth or fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, between the first DCI, the second DCI, and the at least one third DCI They are separated by at least one preset DCI interval time respectively.

With reference to the sixth possible implementation manner of the second aspect, in the seventh possible implementation manner of the second aspect, the number of the third DCI and/or the preset DCI interval time length is the same as that of the second network. The coverage capability of the device corresponds.

With reference to the seventh possible implementation manner of the second aspect, in the eighth possible implementation manner of the second aspect, the quantity of the third DCI is proportional to the coverage capability of the second network device, and the preset The length of the DCI interval is proportional to the coverage capability of the second network device.

With reference to any one possible implementation manner of the second aspect to the eighth possible implementation manner of the second aspect, in a ninth possible implementation manner of the second aspect, the response feedback message includes an ACK message or a NACK message;

The processing module is specifically configured to instruct the sending module to send at least two ACK messages of the first data packet to the first network device if it is determined that the first data packet is received normally; If the first data packet is not received normally, the sending module is instructed to send at least two NACK messages of the first data packet to the first network device.

A third aspect provides a method for transmitting a response message, including:

The first network device sends the first data packet to the second network device;

The first network device receives at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are set repeatedly in the time domain. The response feedback messages sequentially differ by a preset repetition interval in the time domain;

The first network device determines whether the first data packet is sent successfully according to the at least two response feedback messages.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the at least two response feedback messages are repeatedly set in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, Transport block repetition, frame repetition.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the number of the response feedback messages and/or the preset repetition interval time length is the same as the The coverage capability of the second network device corresponds.

With reference to the second possible implementation manner of the third aspect, in the third possible implementation manner of the third aspect, the number of the response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition The interval time length is proportional to the coverage capability of the second network device.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, before the first network device sends the first data packet to the second network device, the method further includes:

receiving, by the first network device, a first DCI sent by the second network device, where the first DCI includes transmission resource configuration information of the first data packet;

The first network device sends the first data packet to the second network device, including:

sending, by the first network device, the first data packet to the second network device on the transmission resource indicated by the first DCI;

The first network device receives at least two response feedback messages of the first data packet sent by the second network device, including:

The first network device sequentially receives the second DCI and at least one third DCI sent by the second network device, and the second DCI and the at least one third DCI respectively include a response to the first data packet feedback message.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK repetition field in the third DCI repeats Carry the response feedback message.

With reference to the fourth or fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, between the first DCI, the second DCI, and the at least one third DCI They are separated by at least one preset DCI interval time respectively.

With reference to the sixth possible implementation manner of the third aspect, in the seventh possible implementation manner of the third aspect, the number of the third DCI and/or the preset DCI interval time length is the same as that of the second network. The coverage capability of the device corresponds.

With reference to the seventh possible implementation manner of the third aspect, in the eighth possible implementation manner of the third aspect, the number of the third DCI is proportional to the coverage capability of the second network device, and the preset The length of the DCI interval is proportional to the coverage capability of the second network device.

With reference to any possible implementation manner of the third aspect to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the response feedback message includes an ACK message or a NACK message;

The first network device determines whether the first data packet is sent successfully according to the at least two response feedback messages, including:

The first network device determines that the first data packet is successfully sent according to at least two ACK messages, or the first network device determines that the first data packet fails to be sent according to at least two NACK messages and determines to retransmit the first packet.

A fourth aspect provides a method for transmitting a reply message, including:

The second network device receives the first data packet sent by the first network device;

The second network device determines whether the first data packet is received normally;

The second network device sends at least two acknowledgment feedback messages of the first data packet to the first network device, the at least two acknowledgment feedback messages are repeatedly set in the time domain, and the at least two acknowledgments The feedback messages sequentially differ by a preset repetition interval in the time domain.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the at least two response feedback messages are repeatedly set in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, Transport block repetition, frame repetition.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the number of the response feedback messages and/or the preset repetition interval time length is the same as the The coverage capability of the second network device corresponds.

With reference to the second possible implementation manner of the fourth aspect, in the third possible implementation manner of the fourth aspect, the number of the response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition The interval time length is proportional to the coverage capability of the second network device.

With reference to the fourth aspect, in a fourth possible implementation manner of the fourth aspect, before the second network device receives the first data packet sent by the first network device, the method further includes:

sending, by the second network device, a first DCI to the first network device, where the first DCI includes transmission resource configuration information of the first data packet;

The second network device receives the first data packet sent by the first network device, including:

receiving, by the second network device, the first data packet sent by the first network device on the transmission resource indicated by the first DCI;

The second network device sends at least two response feedback messages of the first data packet to the first network device, including:

The second network device sequentially sends a second DCI and at least one third DCI to the first network device, and the second DCI and the at least one third DCI respectively include response feedback of the first data packet information.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK in the third DCI repeats field carries the reply feedback message.

With reference to the fourth or fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, between the first DCI, the second DCI, and the at least one third DCI They are separated by at least one preset DCI interval time respectively.

With reference to the sixth possible implementation manner of the fourth aspect, in the seventh possible implementation manner of the fourth aspect, the number of the third DCI and/or the preset DCI interval time length is the same as that of the second network. The coverage capability of the device corresponds.

With reference to the seventh possible implementation manner of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the number of the third DCI is proportional to the coverage capability of the second network device, and the preset The length of the DCI interval is proportional to the coverage capability of the second network device.

With reference to any one possible implementation manner of the fourth aspect to the eighth possible implementation manner of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the response feedback message includes an ACK message or a NACK message;

The second network device sends at least two response feedback messages of the first data packet to the first network device, including:

If the second network device determines that the first data packet is received normally, the second network device sends at least two ACK messages of the first data packet to the first network device; if the second network device If the network device determines that the first data packet is not received normally, the second network device sends at least two NACK messages of the first data packet to the first network device.

In the method and network device for transmitting a response message provided by the embodiments of the present invention, after sending the first data packet to the second network device, receiving at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages of the first data packet sent by the second network device are received. The two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages sequentially differ by a preset repetition interval in the time domain, and then the first data is determined according to the at least two response feedback messages Whether the packet is sent successfully or not increases the time diversity gain of the received response feedback message, thereby improving the reliability of the response feedback message.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a first embodiment of a network device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of DCI format;

3 is a schematic diagram of sending a response feedback message through DCI;

FIG. 4 is a schematic structural diagram of Embodiment 2 of a network device provided by an embodiment of the present invention;

5 is a flowchart of Embodiment 1 of a method for transmitting a reply message provided by an embodiment of the present invention;

6 is a flowchart of Embodiment 2 of a method for transmitting a reply message provided by an embodiment of the present invention;

7 is a flowchart of Embodiment 3 of a method for transmitting a reply message provided by an embodiment of the present invention;

FIG. 8 is a flowchart of Embodiment 4 of a method for transmitting a reply message according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The network devices in the wireless communication system can be divided into two types: the sender and the receiver. The sender and the receiver are not fixed attributes of the network device. When the network device is sending data, it can be called the sender. When a device receives data, it is called a receiver. Generally, all network devices in a wireless communication system have the capability of sending data and receiving data at the same time, that is, it can be used as both a sending end and a receiving end. In this embodiment of the present invention, a network device that sends data is referred to as a first network device, and a network device that receives data is referred to as a second network device. The first network device and the second network device are only used to distinguish the data transmission states of the network devices.

FIG. 1 is a schematic structural diagram of a first embodiment of a network device according to an embodiment of the present invention. As shown in FIG. 1 , the network device in this embodiment includes:

The sending module 11 is configured to send the first data packet to the second network device.

Specifically, the network device provided in this embodiment is a data sending end in a wireless communication system, that is, a first network device. The sending module 11 in the first network device sends data to the second network device in the channel allocated for it, wherein the first network device sends data to the second network device in the form of data packets. Assuming that the data packet sent by the first network device to the second network device is the first data packet, after the first network device has sent the first data packet, it will wait to receive the response feedback message of the first data packet sent by the second network device , to determine whether the first data packet is sent successfully, and if it is not sent successfully, the first data packet is to be retransmitted. The acknowledgment feedback message includes an ACK or NACK message.

The receiving module 12 is configured to receive at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are sequentially arranged in the time domain A difference of a preset repeat interval time.

Specifically, after the sending module 11 finishes sending the first data packet, the receiving module 12 in the first network device will receive the ACK or NACK message sent by the second network device. In order to improve the transmission reliability of the ACK/NACK message, and considering that in the narrowband terminal system, the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously sent acknowledgment feedback messages cannot be obtained enough in the narrowband terminal system. time diversity gain. Therefore, in this embodiment, the receiving module 12 receives at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are set repeatedly in the time domain. The feedback messages sequentially differ by a preset repetition interval in the time domain.

That is to say, the at least two response feedback messages of the first data packet received by the receiving module 12 are not continuously sent in the time domain, but differ in sequence by a preset time interval. In this way, the response feedback message received by the network device provided in this embodiment will have a higher time diversity gain than the response feedback message received continuously. The greater the number of at least two response feedback messages and the longer the preset time interval between the response feedback messages, the higher the time diversity gain. The at least two acknowledgment feedback messages may be repeated according to any repetition mode in the time domain, such as bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

The processing module 13 is configured to determine whether the first data packet is sent successfully according to the at least two response feedback messages.

Specifically, the processing module 13 combines the at least two response feedback messages received by the receiving module 12, so that the combined message will obtain a higher time diversity gain. The processing module 13 has higher reliability for determining whether the first data packet is sent successfully according to the at least two response feedback messages.

The specific method for the processing module 13 to determine whether the first data packet is sent successfully according to the at least two response feedback messages is the same as the current method for continuously sending the response feedback messages, which will not be repeated here.

The network device provided in this embodiment receives at least two response feedback messages of the first data packet sent by the second network device after sending the first data packet to the second network device, where the at least two response feedback messages are in The setting is repeated in the time domain, and the at least two response feedback messages differ in sequence by a preset repetition interval in the time domain, and then whether the first data packet is sent successfully is determined according to the at least two response feedback messages, and the The time diversity gain of the received acknowledgment feedback message is improved, thereby improving the reliability of the acknowledgment feedback message.

Further, in the embodiment shown in FIG. 1 , the number of at least two response feedback messages of the first data packet received by the receiving module 12 and/or the at least two response feedback messages of the first data packet differ in the time domain at one time. The preset repeat interval time can be set in steps. Since the time diversity gain of the response feedback message is higher, the reliability of the response feedback message is also higher, and accordingly, the coverage capability of the second network device is also stronger. Therefore, the number of the at least two response feedback messages of the first data packet, the preset repetition interval time of the difference between the at least two response feedback messages of the first data packet in the time domain, or the combination of the above two can be used to perform Binning settings, different bins correspond to different coverage capabilities. The first network device and the second network device may agree in advance the corresponding relationship between the number of response feedback messages, the preset repetition interval time and the coverage capability binning of the second network device, so that the coverage capability binning can be notified only by signaling, Thereby, signaling overhead can be reduced.

Further, the number of response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition interval time length is proportional to the coverage capability of the second network device. That is to say, the greater the number of response feedback messages and the longer the preset repetition interval, the stronger the coverage capability of the corresponding second network device. This is because, in principle, the greater the number of response feedback messages, or the preset repetition interval time length, the higher the time diversity gain can be obtained, and therefore the stronger the coverage capability of the corresponding second network device.

It should be noted that, by default, the second network device may neither enable the repeat mode nor enable the interval repeat mode. That is, the coverage capability of the second network device can be adjusted. The unit of the preset repetition interval time may be a time slot (slot) or a frame (frame) or the like. Alternatively, multiple mapping tables may be defined, and the first network device and the second network device may be notified of which mapping table to use through system broadcast.

In another implementation manner of the network device shown in FIG. 1 , based on the network device shown in FIG. 1 , the receiving module 12 is further configured to receive the first data packet before the sending module 11 sends the first data packet to the second network device. The first downlink control information (Downlink Control Information, DCI) sent by the second network device includes the transmission resource configuration information of the first data packet in the first DCI. The sending module 11 is specifically configured to send the first data packet to the second network device on the transmission resource indicated by the first DCI. The receiving module 12 is specifically configured to sequentially receive the second DCI and at least one third DCI sent by the second network device, and the second DCI and the at least one third DCI respectively include response feedback messages of the first data packet. The ACK field in the second DCI carries the acknowledgment feedback message, and the ACK repetition field in the third DCI carries the acknowledgment feedback message.

Specifically, the transmission resource used by the first network device to send the first data packet may be notified by the second network device, and the second network device generally indicates the transmission resource of the first network device through DCI. The second network device sends the first DCI to the first network device, where the first DCI includes transmission resource configuration information of the first data packet. After receiving the first DCI, the receiving module 12 can obtain the transmission resource used for sending the first data packet. The sending module 11 sends the first data packet to the second network device on the transmission resource indicated by the first DCI. Since the DCI sent by the second network device to the first network device is periodic, each DCI sequentially differs by a preset repetition interval in the time domain. Therefore, an ACK/NACK message may be added to the DCI sent by the second network device to the first network device, so as to realize the transmission of the acknowledgment feedback message. DCI interval (interval), that is, DCI cycle. The DCI always appears at a fixed position within the DCI interval, that is to say, after the first network device completes downlink synchronization, it finds the boundary of the DCI interval, that is, the position of the DCI can be found. The easiest way to do this is for DCI to appear at the beginning of the DCI interval.

After receiving the first DCI, the receiving module 12 sequentially receives the second DCI and at least one third DCI, wherein the second DCI and the at least one third DCI respectively include a response feedback message of the first data packet. In this way, the receiving module 12 can receive at least two response feedback messages of the first data packet, and the at least two response feedback messages sequentially differ by a preset repetition interval in the time domain.

The specific DCI format is as follows, as shown in FIG. 2 , which is a schematic diagram of the DCI format. DCI includes DL number, UL number, ACK, ACK repetition, DL Allocation, UL Allocation, R and Cyclic Redundancy Check. CRC) field. The DLnumber field indicates the number of downlink scheduling users in this DCI, and the UL number field indicates the number of uplink scheduling users in this DCI. They are allocated 4 bits (bits) respectively, and 2 ⁴ =16 downlink/uplink users can be scheduled respectively; The ACK repetition field is the repetition of the ACK field in the previous DCI, and each of them is allocated 16 bits; since the user uplink scheduling overlaps with the subsequent DCI, at this time, the uplink transmission response The message is carried in the next most recent DCI. The DL Allocation field indicates downlink scheduling resources, the UL Allocation field is used to indicate uplink scheduling resources, and the content contained in the DL/UL Allocation field is shown in Figure 2, which mainly bears the resource allocation and scheduling information of users, and is used to indicate users (cells in the figure). Wireless network temporary identifier (Cell Radio Network Temporary Identifier, C-RNTI field) which channel is allocated (Channel ID field in the figure), where to start (Start Indicator field in the figure), and how many Long (Duration field in the figure), which modulation and coding method to use (Modulation and Coding Scheme (MCS) field in the figure); R is the Reserved field; CRC is the Cyclic Redundancy Check sequence for error detection. When scheduling users for uplink transmission, in addition to allocating start indicator and duration, ACK index resources also need to be allocated to indicate the specific bit position in the ACK field in the DCI, that is, which bit corresponds to a previously scheduled user. The ACK repetition field in the subsequent DCI is the repetition of the ACK field in the previous DCI, which is used to improve the reliability of ACK transmission.

For an uplink user scheduled for a certain DCI, the ACK/NACK of the uplink transmission information can be sent in the subsequent DCI. The ACK repetition field is added to improve the reliability of ACK transmission. It should be noted that, after the receiving module 12 receives the first DCI, although it is the DCI after continuous reception, the response feedback message corresponding to the first data packet indicated by the first DCI may not be added to the continuous DCI. That is, there may be a preset time interval between the second DCI received by the receiving module 12 and the response feedback message included in at least one third DCI, and the preset time interval may be several DCI sending cycles. Further, at least one preset DCI interval time is respectively between the first DCI, the second DCI and the at least one third DCI.

FIG. 3 is a schematic diagram of sending a response feedback message through DCI. It is assumed that the second network device schedules two first network devices in the nth DCI sent, which are the first network device A and the first network device B, respectively. The first network device A and the first network device B respectively complete the transmission of the first data packet in the corresponding channel and time according to the scheduling information in the nth DCI. A DCI interval (interval) in the figure represents a DCI cycle, in which the first data packet of the first network device A is sent within the first DCI interval, and the first data packet of the first network device B is sent in the first DCI interval. If the transmission is not completed within the interval, the transmission is completed within the second DCI interval. Then, the ACK field in the n+1 th DCI contains the response feedback message of the first network device A. However, since the transmission time of the first network device B overlaps with the n+1 th DCI, the ACK field in the n+2 th DCI contains the response feedback message of the first network device B. The ACK repetition field in the n+2th DCI contains the repetition of the response feedback message of the first network device A. In the schematic diagram shown in Figure 3, it is assumed that the repetition interval of the ACKRepetition field is a DCI interval, that is, the ACK field in the current nth DCI, and the ACK Repetition in the subsequent n+1th DCI is repeatedly sent, that is, the interval a DCI interval.

Further, the ACK repetition field interval can also be configured as m DCIs, that is, the ACK field in the nth DCI can be repeated in the ACK Repetition field of the n+mth DCI, which increases the time diversity gain and improves the reliability of ACK transmission.

Further, the at least one third DCI is used to repeatedly send a response feedback message for sending the first data packet by the first network device, and the interval between the ACK/NACK message is set to a preset time interval. The number and/or the preset DCI interval time length corresponds to the coverage capability of the second network device. The quantity of the third DCI is proportional to the coverage capability of the second network device, and the preset DCI interval time length is proportional to the coverage capability of the second network device.

Further, in the network device provided by the above embodiment, the response feedback message includes an ACK message or a NACK message. The processing module 13 is specifically configured to determine that the first data packet is successfully sent according to at least two ACK messages, or to determine that the first data packet has failed to be sent according to at least two NACK messages and to retransmit the first data packet.

FIG. 4 is a schematic structural diagram of Embodiment 2 of a network device according to an embodiment of the present invention. As shown in FIG. 4 , the network device in this embodiment includes:

The receiving module 41 is configured to receive the first data packet sent by the first network device.

Specifically, the network device provided in this embodiment is a data receiving end in a wireless communication system, that is, a second network device. The receiving module 41 in the second network device receives data sent by the first network device, where the first network device sends data to the second network device in the form of data packets. Assuming that the data packet sent by the first network device to the second network device is the first data packet, after the first network device has sent the first data packet, it will wait to receive the response feedback message of the first data packet sent by the second network device , to determine whether the first data packet is sent successfully, and if it is not sent successfully, the first data packet is to be retransmitted. The acknowledgment feedback message includes an ACK or NACK message.

The processing module 42 is configured to determine whether the first data packet is received normally.

Specifically, the processing module 42 is configured to determine whether the first data packet received by the receiving module 41 is normal. The processing module 42 can verify the first data packet by any verification method to determine whether the first data packet is received normally. For example, conventional check methods such as parity check.

The sending module 43 is configured to send at least two response feedback messages of the first data packet to the first network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are sequentially different in the time domain A preset repeat interval.

Specifically, after the processing module 42 determines whether the first data packet is received normally, the sending module 43 will send an ACK or NACK message of the first data packet to the first network device. In order to improve the transmission reliability of the ACK/NACK message, and considering that in the narrowband terminal system, the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously sent acknowledgment feedback messages cannot be obtained enough in the narrowband terminal system. time diversity gain. Therefore, in this embodiment, the sending module 43 sends at least two response feedback messages of the first data packet to the first network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are The messages sequentially differ by a preset repetition interval in the time domain.

That is to say, the at least two response feedback messages of the first data packet sent by the sending module 43 are not sent continuously in the time domain, but differ in sequence by a preset time interval. In this way, the response feedback message sent by the network device provided in this embodiment will have a higher time diversity gain than the response feedback message sent continuously. The greater the number of at least two response feedback messages and the longer the preset time interval between the response feedback messages, the higher the time diversity gain. The at least two acknowledgment feedback messages may be repeated according to any repetition mode in the time domain, such as bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition. After receiving the at least two response feedback messages, the first network device combines the at least two response feedback messages, so that the combined message will obtain a higher time diversity gain. It is more reliable for the first network device to determine whether the first data packet is sent successfully according to the at least two response feedback messages.

The network device provided in this embodiment sends at least two response feedback messages of the first data packet to the first network device after receiving the first data packet sent by the first network device, and the at least two response feedback messages are at the time of The setting is repeated in the domain, and the at least two response feedback messages differ in sequence by a preset repetition interval in the time domain, so that the first network device determines whether the first data packet is sent according to the at least two response feedback messages. Successfully, the time diversity gain of sending the response feedback message is improved, thereby improving the reliability of the response feedback message.

Further, in the embodiment shown in FIG. 1 , the number of at least two response feedback messages of the first data packet sent by the sending module 43 and/or the at least two response feedback messages of the first data packet differ in the time domain at one time. The preset repeat interval time can be set in steps. Since the time diversity gain of the response feedback message is higher, the reliability of the response feedback message is also higher, and accordingly, the coverage capability of the second network device is also stronger. Therefore, the number of the at least two response feedback messages of the first data packet, the preset repetition interval time of the difference between the at least two response feedback messages of the first data packet in the time domain, or the combination of the above two can be used to perform Binning settings, different bins correspond to different coverage capabilities. The first network device and the second network device may agree in advance the corresponding relationship between the number of response feedback messages, the preset repetition interval time and the coverage capability binning of the second network device, so that the coverage capability binning can be notified only by signaling, Thereby, signaling overhead can be reduced.

Further, the number of response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition interval time length is proportional to the coverage capability of the second network device. That is to say, the greater the number of response feedback messages and the longer the preset repetition interval, the stronger the coverage capability of the corresponding second network device. This is because, in principle, the greater the number of response feedback messages, or the preset repetition interval time length, the higher the time diversity gain can be obtained, and therefore the stronger the coverage capability of the corresponding second network device.

It should be noted that, by default, the second network device may neither enable the repeat mode nor enable the interval repeat mode. That is, the coverage capability of the second network device can be adjusted. The unit of the preset repetition interval time may be a time slot (slot) or a frame (frame) or the like. Alternatively, multiple mapping tables may be defined, and the first network device and the second network device may be notified of which mapping table to use through system broadcast.

In another implementation manner of the network device shown in FIG. 4 , on the basis of the network device shown in FIG. 4 , the sending module 43 is further configured to send the receiving module 41 to the first data packet sent by the first network device before the receiving module 41 receives the first data packet sent by the first network device. The first network device sends a first DCI, where the first DCI includes transmission resource configuration information of the first data packet, and the first DCI includes transmission resource configuration information of the first data packet. The receiving module 41 is specifically configured to receive the first data packet sent by the first network device on the transmission resource indicated by the first DCI. The sending module 43 is specifically configured to send the second DCI and the at least one third DCI to the first network device in sequence, and the second DCI and the at least one third DCI respectively include response feedback messages of the first data packet. The ACK field in the second DCI carries the acknowledgment feedback message, and the ACK repetition field in the third DCI carries the acknowledgment feedback message.

Specifically, the transmission resource used by the first network device to send the first data packet may be notified by the second network device, and the second network device generally indicates the transmission resource of the first network device through DCI. The sending module 43 sends the first DCI to the first network device, where the first DCI includes transmission resource configuration information of the first data packet. After receiving the first DCI, the first network device may know the transmission resource used for sending the first data packet. The receiving module 41 receives the first data packet sent by the first network device on the transmission resource indicated by the first DCI. Since the DCI sent by the sending module 43 to the first network device is periodic, each DCI sequentially differs by a preset repetition interval in the time domain. Therefore, an ACK/NACK message may be added to the DCI sent by the sending module 43 to the first network device, so as to realize the transmission of the acknowledgment feedback message. DCI interval (interval), that is, DCI cycle. The DCI always appears at a fixed position within the DCI interval, that is to say, after the first network device completes downlink synchronization, it finds the boundary of the DCI interval, that is, the position of the DCI can be found. The easiest way to do this is for DCI to appear at the beginning of the DCI interval.

After sending the first DCI, the sending module 43 sends the second DCI and at least one third DCI in sequence, wherein the second DCI and the at least one third DCI respectively include a response feedback message of the first data packet. In this way, the first network device can receive at least two response feedback messages of the first data packet, and the at least two response feedback messages sequentially differ by a preset repetition interval in the time domain.

The specific format of the DCI and the schematic diagrams of sending the response feedback message through the DCI are shown in FIG. 2 and FIG. 3 .

It should be noted that, after the sending module 43 sends the first DCI, although it is the DCI after continuous sending, the response feedback message corresponding to the first data packet indicated by the first DCI may not be added to the continuous DCI. That is, there may be a preset time interval between the second DCI sent by the sending module 43 and the response feedback message included in the at least one third DCI, and the preset time interval may be several DCI sending cycles. Further, at least one preset DCI interval time is respectively between the first DCI, the second DCI and the at least one third DCI.

Further, the at least one third DCI is used to repeatedly send a response feedback message for sending the first data packet by the first network device, and the interval between the ACK/NACK message is set to a preset time interval. The number and/or the preset DCI interval time length corresponds to the coverage capability of the second network device. The quantity of the third DCI is proportional to the coverage capability of the second network device, and the preset DCI interval time length is proportional to the coverage capability of the second network device.

Further, in the network device provided by the embodiment shown in FIG. 4 , the response feedback message includes an ACK message or a NACK message. The processing module 42 is specifically configured to instruct the sending module 43 to send at least two ACK messages of the first data packet to the first network device if it is determined that the reception of the first data packet is normal; if it is determined that the reception of the first data packet is abnormal, instruct the sending module 43 The sending module 43 sends at least two NACK messages of the first data packet to the first network device.

FIG. 5 is a flowchart of Embodiment 1 of a method for transmitting a reply message provided by an embodiment of the present invention. As shown in FIG. 5 , the method of this embodiment includes:

Step S501, the first network device sends a first data packet to the second network device.

Step S502, the first network device receives at least two response feedback messages of the first data packet sent by the second network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are in the time domain The sequence differs by a preset repetition interval time.

Step S503, the first network device determines whether the first data packet is sent successfully according to at least two response feedback messages.

The response message transmission method provided in this embodiment is used to implement the technical solution of the network device shown in FIG. 1 , and the implementation principle and technical effect thereof are similar, and are not repeated here.

Further, in the embodiment shown in FIG. 5 , at least two acknowledgment feedback messages are repeatedly arranged in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

Further, in the embodiment shown in FIG. 5 , the number of response feedback messages and/or the preset repetition interval time length corresponds to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 5 , the number of response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition interval time length is proportional to the coverage capability of the second network device.

FIG. 6 is a flowchart of Embodiment 2 of a method for transmitting a reply message provided by an embodiment of the present invention. As shown in FIG. 6 , the method of this embodiment includes:

Step S601, the first network device receives the first DCI sent by the second network device, where the first DCI includes transmission resource configuration information of the first data packet.

Step S602, the first network device sends the first data packet to the second network device on the transmission resource indicated by the first DCI.

Step S603, the first network device sequentially receives the second DCI and at least one third DCI sent by the second network device, and the second DCI and the at least one third DCI respectively include response feedback messages of the first data packet.

Step S604, the first network device determines whether the first data packet is sent successfully according to at least two response feedback messages.

Further, in the embodiment shown in FIG. 6 , the ACK field in the second DCI carries the acknowledgment feedback message, and the ACK repetition field in the third DCI carries the acknowledgment feedback message.

Further, in the embodiment shown in FIG. 6 , at least one preset DCI interval time is separated between the first DCI, the second DCI and the at least one third DCI respectively.

Further, in the embodiment shown in FIG. 6 , the number of third DCIs and/or the preset DCI interval time length corresponds to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 6 , the number of third DCIs is proportional to the coverage capability of the second network device, and the preset DCI interval time length is proportional to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 5 or FIG. 6 , the response feedback message includes an ACK message or a NACK message; step S503 or step S604 includes: the first network device determines that the first data packet is successfully sent according to at least two ACK messages, Or the first network device determines, according to at least two NACK messages, that the sending of the first data packet fails and determines to retransmit the first data packet.

FIG. 7 is a flowchart of Embodiment 3 of a method for transmitting a reply message provided by an embodiment of the present invention. As shown in FIG. 7 , the method of this embodiment includes:

Step S701, the second network device receives the first data packet sent by the first network device.

Step S702, the second network device determines whether the first data packet is received normally.

Step S703, the second network device sends at least two response feedback messages of the first data packet to the first network device, the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are sequentially arranged in the time domain by a preset repeat interval.

The response message transmission method provided in this embodiment is used to implement the technical solution of the network device shown in FIG. 4 , and the implementation principle and technical effect thereof are similar, and are not repeated here.

Further, in the embodiment shown in FIG. 7 , at least two acknowledgment feedback messages are repeatedly set in one of the following manners in the time domain: bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

Further, in the embodiment shown in FIG. 7 , the number of response feedback messages and/or the preset repetition interval time length corresponds to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 7 , the number of response feedback messages is proportional to the coverage capability of the second network device, and the preset repetition interval time length is proportional to the coverage capability of the second network device.

FIG. 8 is a flowchart of Embodiment 4 of a method for transmitting a reply message provided by an embodiment of the present invention. As shown in FIG. 8 , the method of this embodiment includes:

Step S801, the second network device sends a first DCI to the first network device, where the first DCI includes transmission resource configuration information of the first data packet.

Step S802, the second network device receives the first data packet sent by the first network device on the transmission resource indicated by the first DCI.

Step S803, the second network device determines whether the first data packet is received normally.

Step S804, the second network device sequentially sends the second DCI and at least one third DCI to the first network device, and the second DCI and the at least one third DCI respectively include response feedback messages of the first data packet.

Further, in the embodiment shown in FIG. 8 , the ACK field in the second DCI carries the acknowledgment feedback message, and the ACK repetition field in the third DCI carries the acknowledgment feedback message.

Further, in the embodiment shown in FIG. 8 , the first DCI, the second DCI and the at least one third DCI are separated by at least one preset DCI interval respectively.

Further, in the embodiment shown in FIG. 8 , the number of third DCIs and/or the preset DCI interval time length corresponds to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 8 , the number of third DCIs is proportional to the coverage capability of the second network device, and the preset DCI interval time length is proportional to the coverage capability of the second network device.

Further, in the embodiment shown in FIG. 7 or FIG. 8, the response feedback message includes an ACK message or a NACK message; the second network device sends at least two response feedback messages of the first data packet to the first network device, including: if If the second network device determines that the reception of the first data packet is normal, the second network device sends at least two ACK messages of the first data packet to the first network device; if the second network device determines that the reception of the first data packet is abnormal, the first The second network device sends at least two NACK messages of the first data packet to the first network device.

It should be noted that, the sending module 11 in the embodiment of the present invention may correspond to a transmitter of a network device, or may correspond to a transceiver of the network device. The receiving module 12 may correspond to a receiver of a network device, or may correspond to a transceiver of the network device. The processing module 13 may correspond to a processor in a network device, where the processor may be a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or implement the embodiment of the present invention. one or more integrated circuits. The network device may further include a memory, where the memory is used to store the instruction code, and the processor calls the instruction code of the memory to control the sending module 11 , the receiving module 12 and the processing module 13 in the embodiment of the present invention to perform the above operations.

The receiving module 41 in the embodiment of the present invention may correspond to a receiver of a network device, or may correspond to a transceiver of the network device. The sending module 43 may correspond to the transmitter of the network device, or may correspond to the transceiver of the network device. The processing module 42 may correspond to a processor of a network device, where the processor may be a CPU, or an ASIC, or implement one or more integrated circuits implementing the embodiments of the present invention. The network device may further include a memory, where the memory is used to store the instruction code, and the processor calls the instruction code of the memory to control the receiving module 41 , the sending module 43 and the processing module 42 in the embodiment of the present invention to perform the above operations.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps including the above method embodiments are executed; and the foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (36)

1, kinds of network devices, characterized in that, the network device is network device, the network device includes:

a sending module, configured to send th data packet to the second network device;

a receiving module, configured to receive at least two response feedback messages of the th data packet sent by the second network device, where the at least two response feedback messages are repeatedly set in a time domain, and the at least two response feedback messages sequentially differ in the time domain by preset repetition interval time;

a processing module, configured to determine whether the th data packet is successfully sent according to the at least two response feedback messages;

the receiving module is further configured to receive, before the sending module sends the th data packet to a second network device, th downlink control information DCI sent by the second network device, where the th DCI includes transmission resource configuration information of the th data packet;

the sending module is specifically configured to send the th data packet to the second network device on the transmission resource indicated by the th DCI;

the receiving module is specifically configured to sequentially receive a second DCI and at least third DCIs sent by the second network device, where the second DCI and the at least third DCI each include a response feedback message of the data packet.

2. The network device of claim 1, wherein the at least two acknowledgement feedback messages are arranged in repetitions in the time domain, such as bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

3. The network device according to claim 1, wherein the number of the acknowledgement feedback messages and/or the preset repetition interval time length correspond to a coverage capability of the second network device.

4. The network device of claim 3, wherein the number of the acknowledgement feedback messages is proportional to a coverage capability of the second network device, and wherein the preset repetition interval time length is proportional to the coverage capability of the second network device.

5. The network device of claim 1, wherein an Acknowledgement (ACK) field in the second DCI carries the acknowledgement feedback message, and wherein an ACK repetition field in the third DCI carries the acknowledgement feedback message.

6. The network device of claim 1, wherein the th DCI, the second DCI, and the at least third DCI are each separated by at least preset DCI separation times.

7. The network device of claim 6, wherein the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

8. The network device of claim 7, wherein the number of the third DCI is proportional to the coverage capability of the second network device, and wherein the preset DCI interval time length is proportional to the coverage capability of the second network device.

9. The network device of any of claims 1-8, wherein the acknowledgement feedback message comprises an ACK message or a Negative Acknowledgement (NACK) message;

the processing module is specifically configured to determine that the th data packet is successfully transmitted according to at least two ACK messages, or determine that the th data packet is unsuccessfully transmitted according to at least two NACK messages and determine to retransmit the th data packet.

10, kinds of network devices, characterized in that, the network device is a second network device, the network device includes:

a receiving module, configured to receive a th data packet sent by a th network device;

a processing module for determining whether the th packet is received normally;

a sending module, configured to send at least two response feedback messages of the data packet to the network device, where the at least two response feedback messages are repeatedly set in a time domain, and the at least two response feedback messages sequentially differ in the time domain by preset repetition interval times;

the sending module is further configured to send downlink control information DCI to the network device before the receiving module receives the data packet sent by the network device, where the DCI includes transmission resource configuration information of the data packet;

the receiving module is specifically configured to receive the th data packet sent by the th network device on the transmission resource indicated by the th DCI;

the sending module is specifically configured to send a second DCI and at least third DCIs to the th network device in sequence, where the second DCI and the at least third DCI each include a response feedback message of the th data packet.

11. The network device of claim 10, wherein the at least two acknowledgement feedback messages are arranged in repetitions in the time domain, selected from the group consisting of bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

12. The network device according to claim 10, wherein the number of the acknowledgement feedback messages and/or the preset repetition interval time length correspond to a coverage capability of the second network device.

13. The network device of claim 12, wherein the number of the acknowledgement feedback messages is proportional to a coverage capability of the second network device, and wherein the preset repetition interval time length is proportional to the coverage capability of the second network device.

14. The network device of claim 10, wherein an Acknowledgement (ACK) field in the second DCI carries the acknowledgement feedback message, and wherein an ACK repetition field in the third DCI carries the acknowledgement feedback message.

15. The network device of claim 10, wherein the th DCI, the second DCI, and the at least third DCI are each separated by at least preset DCI separation times.

16. The network device of claim 15, wherein the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

17. The network device of claim 16, wherein the number of the third DCI is proportional to a coverage capability of the second network device, and wherein the preset DCI interval time length is proportional to the coverage capability of the second network device.

18. The network device of any of claims 10-17, wherein the acknowledgement feedback message comprises an ACK message or a Negative Acknowledgement (NACK) message;

the processing module is specifically configured to instruct the sending module to send at least two ACK messages of the th data packet to the th network device if it is determined that the th data packet is received normally, and instruct the sending module to send at least two NACK messages of the th data packet to the th network device if it is determined that the th data packet is received abnormally.

19, A method for transmitting reply messages, comprising:

the network device sends th data packet to the second network device;

the network device receives at least two response feedback messages of the data packet sent by the second network device, wherein the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages sequentially differ in the time domain by preset repetition interval time;

the network device determining whether the data packet was sent successfully according to the at least two acknowledgement feedback messages;

before the network device sends th data packet to the second network device, the method further comprises:

the th network device receives th downlink control information DCI sent by the second network device, where the th DCI includes the transmission resource configuration information of the th data packet;

the th network device sending th data packets to a second network device, comprising:

the network device sends the th data packet to the second network device on the transmission resource indicated by the DCI;

the network device receiving at least two acknowledgement feedback messages of the data packet sent by the second network device, including:

the th network device sequentially receives a second DCI and at least third DCIs sent by the second network device, where the second DCI and the at least third DCI each include a response feedback message of the th data packet.

20. The method of claim 19, wherein the at least two acknowledgement feedback messages are arranged in repetitions in time domain, selected from the group consisting of bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

21. The method according to claim 19, wherein the number of acknowledgement feedback messages and/or the preset repetition interval time length corresponds to a coverage capability of the second network device.

22. The method of claim 21, wherein the number of the acknowledgement feedback messages is proportional to a coverage capability of the second network device, and wherein the preset repetition interval time length is proportional to the coverage capability of the second network device.

23. The method of claim 19, wherein an Acknowledgement (ACK) field in the second DCI carries the acknowledgement feedback message and wherein an ACK repetition field in the third DCI carries the acknowledgement feedback message.

24. The method of claim 19, wherein the th DCI, the second DCI, and the at least third DCI are each separated by at least preset DCI separation times.

25. The method of claim 24, wherein the number of the third DCI and/or the preset DCI interval time length corresponds to a coverage capability of the second network device.

26. The method of claim 25, wherein the number of the third DCI is proportional to the coverage capability of the second network device, and wherein the preset DCI interval time length is proportional to the coverage capability of the second network device.

27. The method of any of claims 19-26, wherein the acknowledgement feedback message comprises an ACK message or a negative acknowledgement, NACK, message;

the network device determining whether the data packet was successfully sent according to the at least two acknowledgement feedback messages, comprising:

the network device determines the data packet was successfully sent based on at least two ACK messages, or the network device determines the data packet was unsuccessfully sent based on at least two NACK messages and determines to retransmit the data packet.

28, A method for transmitting reply messages, comprising:

the second network device receives the data packet sent by the network device;

the second network device determining whether the th packet was received properly;

the second network device sends at least two response feedback messages of the data packet to the network device, wherein the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages sequentially differ in the time domain by preset repetition interval times;

before the second network device receives the th data packet sent by the th network device, the method further includes:

the second network device sends downlink control information DCI to the network device, where the DCI includes the transmission resource configuration information of the data packet;

the second network device receives the th data packet sent by the th network device, and the method comprises the following steps:

the second network device receives the data packet sent by the network device on the transmission resource indicated by the DCI;

the second network device sending at least two acknowledgement feedback messages of the th data packet to the th network device, including:

the second network device sequentially sends a second DCI and at least third DCIs to the network device, where the second DCI and the at least third DCI each include a response feedback message of the data packet.

29. The method of claim 28 wherein the at least two acknowledgement feedback messages are arranged in repetitions in the time domain, selected from the group consisting of bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

30. The method according to claim 28, wherein the number of acknowledgement feedback messages and/or the preset repetition interval time length corresponds to a coverage capability of the second network device.

31. The method of claim 30, wherein the number of the acknowledgement feedback messages is proportional to a coverage capability of the second network device, and wherein the preset repetition interval time length is proportional to the coverage capability of the second network device.

32. The method of claim 28, wherein an Acknowledgement (ACK) field in the second DCI carries the acknowledgement feedback message and wherein an ACK repetition field in the third DCI carries the acknowledgement feedback message.

33. The method of claim 28, wherein the th DCI, the second DCI, and the at least third DCI are each separated by at least preset DCI separation times.

34. The method of claim 33, wherein the number of the third DCI and/or the preset DCI interval time length corresponds to a coverage capability of the second network device.

35. The method of claim 34, wherein the number of the third DCI is proportional to the coverage capability of the second network device, and wherein the preset DCI interval time length is proportional to the coverage capability of the second network device.

36. The method of any of claims 28-35, wherein the acknowledgement feedback message comprises an ACK message or a negative acknowledgement, NACK, message;

the second network device sending at least two acknowledgement feedback messages of the th data packet to the th network device, including:

and if the second network device determines that the data packet is received normally, the second network device sends at least two ACK messages of the data packet to the network device, and if the second network device determines that the data packet is received abnormally, the second network device sends at least two NACK messages of the data packet to the network device.

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