CN107113118B

CN107113118B - Response message transmission method and network equipment

Info

Publication number: CN107113118B
Application number: CN201580070094.2A
Authority: CN
Inventors: 于光炜; 罗之虎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-27
Filing date: 2015-04-27
Publication date: 2020-01-31
Anticipated expiration: 2035-04-27
Also published as: WO2016172818A1; CN107113118A

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

Response message transmission method and network equipment

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to response message transmission methods and network equipment.

Background

With the development of communication technology of the internet of things, the number of connections of Machine to Machine (M2M) communication devices is increasing dramatically. It is expected that by 2022, the number of terminals of M2M will reach 500 billion. The business scene of M2M mainly includes intelligent home/building, intelligent measurement (meter reading business), logistics tracking, environment monitoring, intelligent agriculture, disaster alarm, etc.

Such a massive M2M market places new demands on the communication system. Firstly, the low cost of the terminal is a necessary condition for promoting the mass M2M industry, and as long as the cost of the M2M terminal is low enough, even if the cost factor can be neglected when the M2M terminal is deployed, the interconnection of everything can be really achieved. In addition, while the mass of M2M is emerging, it poses a higher challenge to 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, thus requiring the communications network to provide better coverage capabilities. For some M2M services deployed in the field, such as forest fire alarm, etc., a stricter requirement is imposed on the standby time of the M2M terminal, that is, the M2M terminal is required to save more power. In summary, the requirements of the M2M service for the terminal and the network can be summarized as follows: the terminal has low cost, low power consumption, strong network coverage capability and supports more user numbers.

In order to meet the above requirements in M2M communication, in future communication systems, there may be new terminals, which support narrower bandwidth and may be referred to as narrowband terminals, the narrowband terminals have lower data transmission rate, simpler transmission and reception processes, and are favorable for lower cost and lower Power consumption of the terminals, under the same transmission Power, the narrowband terminals have higher Power Spectral Density (PSD) than the terminals with wider bandwidth, and can resist more transmission loss, thereby achieving the purpose of coverage enhancement, under the condition of the same Spectrum bandwidth, the narrowband terminals use narrower frequencies, and therefore can support more terminals to communicate simultaneously, therefore, the narrowband terminals meet the requirements of M2M terminals on low cost, low Power consumption, strong network coverage, and supporting more user numbers, and are preferred solutions of M2M terminals.

In a wireless communication system, a sending end pauses sending data packets each time and waits for an Acknowledgement message of a receiving end, when the data packets arrive at the receiving end, the receiving end detects the data packets, if the data packets arrive at the receiving end correctly, the receiving end returns an Acknowledgement (ACK) message to the sending end, if the data packets fail to receive, the receiving end returns a Negative Acknowledgement (NACK) message to the sending end, when the sending end receives the ACK message, the sending end continues to send new data packets, when the sending end receives the NACK message, the sending end resends the data packets transmitted last time, and the sending end needs to determine the time and the mode for sending the data packets according to the ACK/NACK message, so that the improvement of the reliability of the ACK/NACK message transmission is particularly important.

The method for improving the transmission reliability of the ACK/NACK message mainly comprises the following steps: repetition coding and repetition ACK/NACK, and a combination of both. The repetition coding method reduces the transmission efficiency, and the repetition ACK/NACK method is to repeatedly transmit ACK/NACK messages on consecutive subframes for a plurality of times.

For communication systems using narrowband terminals, the spectral bandwidth of the system is usually very narrow, and sufficient frequency diversity gain cannot be obtained by frequency modulation, therefore, obtaining sufficient time diversity gain is critical to improve transmission reliability, and the narrowband terminal is generally applied in a static environment or a low-speed mobile environment, where the mobile speed is low and the doppler shift is low, and the lower the doppler shift, the longer the corresponding channel coherence time.

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

Disclosure of Invention

The embodiment of the invention provides response message transmission methods and network equipment, which improve the time diversity gain of response feedback messages and further improve the reliability of the response feedback messages.

An th aspect provides kinds of network devices, the network devices being a th network device, the network devices comprising:

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;

and the processing module is used for determining whether the th data packet is successfully sent according to the at least two response feedback messages.

With reference to the aspect, in possible implementation manner of the aspect, the at least two acknowledgement feedback messages are arranged in repetitions of bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition in a time domain.

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

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

With reference to the , in a fourth possible implementation manner of the , the receiving module is further configured to receive th DCI sent by a second network device before the sending module sends a th data packet to 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.

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

With reference to the , in a sixth possible implementation manner of the , the DCI, the second DCI, and the at least third DCIs are separated by at least preset DCI separation times, respectively.

With reference to the , in a seventh possible implementation manner of the , the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

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

With reference to any possible implementation manners of the eighth possible implementation manners of the aspects from the to the , in a ninth possible implementation manner of the , the response feedback message includes an ACK message or a 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.

A second aspect provides network devices, the network device being a second network device, the network device comprising:

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 th data packet to the th 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.

With reference to the second aspect, in possible implementation manners of the second aspect, the at least two acknowledgement feedback messages are arranged in repetitions in a time domain, where the repetitions are bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

With reference to the second aspect or the th possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the number of the response feedback messages and/or the preset repetition interval time length correspond to a coverage capability of the second network device.

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

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 response feedback message, and the ACK repetition field in the third DCI carries the response 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, at least preset DCI interval times are respectively left among the th DCI, the second DCI, and the at least third DCI.

With reference to the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

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

With reference to any possible implementation manners 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 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.

The third aspect provides methods for transmitting reply messages, including:

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.

With reference to the third aspect, in an possible implementation manners of the third aspect, the at least two acknowledgement feedback messages are arranged in repetition manners of bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition in a time domain.

With reference to the third aspect or possible implementation manners 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 correspond to a coverage capability of the second network device.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the number of the response feedback messages is directly proportional to the coverage capability of the second network device, and the preset repetition interval time length is directly 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 sending, by the network device, the data packet to the second network device, the method further includes:

the th network device receives th 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.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, an ACK field in the second DCI carries the response feedback message, and an ACK repetition field in the third DCI carries 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, at least preset DCI interval times are respectively left among the th DCI, the second DCI, and the at least third DCI.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

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

With reference to any possible implementation manners 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 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.

A fourth aspect provides methods for transmitting an acknowledgment message, 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 th data packet to the th 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.

With reference to the fourth aspect, in an th possible implementation manner of the fourth aspect, the at least two acknowledgement feedback messages are arranged in repetitions in a time domain, where the repetitions are bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.

With reference to the fourth aspect or the th 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 correspond to a coverage capability of the second network device.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the number of the response feedback messages is directly proportional to the coverage capability of the second network device, and the preset repetition interval time length is directly 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 receiving, by the second network device, the data packet sent by the th network device, the method further includes:

the second network device sends DCI to the network device, wherein 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.

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 response feedback message, and the ACK repetition field in the third DCI carries the response 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, at least preset DCI interval times are respectively left among the th DCI, the second DCI, and the at least third DCI.

With reference to the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the number of the third DCI and/or the preset DCI interval time length correspond to a coverage capability of the second network device.

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

With reference to any possible implementation manners in the eighth possible implementation manners of the fourth aspect to 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;

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.

According to the response message transmission method and the network device provided by the embodiment of the invention, after the th data packet is sent to the second network device, at least two response feedback messages of the th data packet sent by the second network device are received, the at least two response feedback messages are repeatedly arranged in the time domain, the difference between the at least two response feedback messages in the time domain is preset repetition interval time, and whether the th data packet is successfully sent is determined according to the at least two response feedback messages, so that the time diversity gain of the received response feedback messages is improved, and the reliability of the response feedback messages is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, is briefly introduced in the drawings required in the description of the embodiments or the prior art, it is obvious that the drawings in the following description are embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

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

fig. 2 is a schematic diagram of a DCI format;

fig. 3 is a diagram illustrating transmission of a response feedback message through DCI;

fig. 4 is a schematic structural diagram of a second network device according to an embodiment of the present invention;

fig. 5 is a flowchart of an embodiment of a method for transmitting an acknowledgement message according to an embodiment of the present invention;

fig. 6 is a flowchart of a second embodiment of a method for transmitting a response message according to the present invention;

fig. 7 is a flowchart of a third embodiment of a method for transmitting a response message according to the present invention;

fig. 8 is a flowchart of a fourth method for transmitting a response message according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete description of the technical solutions of the embodiments of the present invention will be given below with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of of the present invention, rather than all embodiments.

The network devices in the wireless communication system can be divided into two types, namely a transmitting end and a receiving end, wherein the transmitting end and the receiving end are not fixed attributes of the network devices, and when the network devices transmit data, the network devices can be called as the transmitting end, and when the network devices receive data, the network devices can be called as the receiving end.

Fig. 1 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 1, the network device of this embodiment includes:

a sending module 11, configured to send th 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 th network device, a sending module 11 in a th network device sends data to a second network device in a channel allocated to the second network device, where the th network device sends data to the second network device in a data packet manner, and if a data packet sent by a th network device to the second network device is a th data packet, after the th network device sends a th data packet, a response feedback message of a th data packet sent by the second network device is waited to be received to determine whether the th data packet is sent successfully, and if the sending is not successful, a nd data packet is retransmitted.

The receiving module 12 is configured to receive at least two response feedback messages of an th data packet sent by the second network device, where the at least 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 time in the time domain.

In particular, after the transmitting module 11 has transmitted the th data packet, the receiving module 12 in the th network device will receive the ACK or NACK message transmitted by the second network device, in order to improve the transmission reliability of the ACK/NACK message and take into account that in the narrowband terminal system, the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously transmitted response feedback messages cannot obtain a sufficient time diversity gain in the narrowband terminal system, therefore, in the present embodiment, the receiving module 12 receives at least two response feedback messages of the th data packet transmitted 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 sequentially differ in the time domain by preset repetition interval time.

That is, at least two response feedback messages of the th data packet received by the receiving module 12 are not continuously transmitted in the time domain, but are sequentially different by preset time intervals, so the network device provided by this embodiment receives response feedback messages with higher time diversity gain than the continuously received response feedback messages, the greater the number of the 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 response feedback messages may be repeated in any repeating manners in the time domain of bit repetition, symbol repetition, code block repetition, transport block repetition, frame repetition, etc.

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

Specifically, the processing module 13 synthesizes at least two response feedback messages received by the receiving module 12, so that the synthesized message will obtain a higher time diversity gain, and the reliability of determining, by the processing module 13, whether the th data packet is successfully transmitted is higher according to the at least two response feedback messages.

The specific method for the processing module 13 to determine whether the th data packet is successfully sent according to the at least two response feedback messages is the same as the current method for continuously sending the response feedback messages, and is not described here again.

In the network device provided by this embodiment, after sending the th data packet to the second network device, the network device receives 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 the time domain, and the at least two response feedback messages sequentially differ by preset repetition interval time in the time domain, and then determines whether the th data packet is successfully sent according to the at least two response feedback messages, so that a time diversity gain of the received response feedback messages is improved, and thus reliability of the response feedback messages is improved.

Further , in the embodiment shown in fig. 1, the number of at least two response feedback messages of the th packet and/or the preset repetition interval time of at least two response feedback messages of the th packet received by the receiving module 12 may be set in steps, since the higher the time diversity gain of the response feedback messages, the higher the reliability of the response feedback messages, and accordingly, the stronger the coverage capability of the second network device, therefore, the number of at least two response feedback messages of the th packet, the preset repetition interval time of at least two response feedback messages of the th packet, or a combination of the two may be set in steps, and different steps correspond to different coverage capabilities.

Further , the number of the response feedback messages is proportional to the coverage of the second network device, and the length of the preset repetition interval is proportional to the coverage of the second network device.

The second network device may not turn on the repetition mode or turn on the interval repetition mode by default, that is, the coverage capability of the second network device may be adjusted, wherein the unit of the preset repetition interval time may be a slot (slot) or a frame (frame), etc. alternatively, various mapping tables may be defined, which mapping tables are used by the network device and the second network device may be notified through the system .

In another implementation manners of the network device shown in fig. 1, on the basis of the network device shown in fig. 1, the receiving module 12 is further configured to receive, before the sending module 11 sends the th data packet to the second network device, th Downlink Control Information (DCI) sent by the second network device, where the th DCI includes transmission resource configuration Information of a th data packet, the sending module 11 is specifically configured to send an th data packet to the second network device on a transmission resource indicated by the th DCI, and the receiving module 12 is specifically configured to sequentially receive the second DCI and at least third DCIs sent by the second network device, where the second DCI and the at least third DCIs respectively configured to include an acknowledgement feedback message of an th data packet, an ACK field in the second DCI carries an acknowledgement feedback message, and an ACK repetition field in the third DCI carries an acknowledgement feedback message.

Specifically, the transmission resource used by the network device to send the th packet may be notified by the second network device, the second network device generally indicates the transmission resource of the th network device through DCI, the second network device sends the th DCI to the th network device, the th DCI includes the transmission resource configuration information of the th packet, after receiving the th DCI, the receiving module 12 may know the transmission resource used to send the th packet, the sending module 11 sends the th packet to the second network device on the transmission resource indicated by the DCI, since the DCI sent by the second network device to the th network device is periodic, each DCI sequentially differs from the in time domain by a preset repetition interval time, therefore, an ACK/NACK message may be added to the DCI sent by the second network device to the th network device, thereby implementing transmission of the response feedback message, DCI interval (DCI), that is, the DCI always found in a fixed location within the period, that is the DCI found in the earliest DCI synchronization start position, that is the DCI found when the DCI is found.

After receiving the th DCI, the receiving module 12 sequentially receives a second DCI and at least third DCIs, where the second DCI and the at least third DCIs respectively include response feedback messages of a th data packet, so that the receiving module 12 may receive at least two response feedback messages of a th data packet, and the at least two response feedback messages sequentially differ from each other in time domain by a preset repetition interval time.

Specific DCI formats are as follows, as shown in fig. 2, and fig. 2 is a schematic diagram of the DCI formats. The DCI includes downlink number (DLnumber), uplink number (UL number), ACK repetition (repetition), downlink Allocation (DL Allocation), uplink Allocation (UL Allocation), R, and Cyclic Redundancy Check (CRC) fields. The DLnumber field indicates the number of downlink scheduling users in the DCI, the UL number field indicates the number of uplink scheduling users in the DCI, the DLnumber field and the UL number field are respectively allocated with 4 bits (bits) and can respectively schedule 2 bits⁴16 downlink/uplink users; the ACK field is used for indicating the response message transmitted by the uplink user scheduled by the previous DCI, the ACK repetition field is the repetition of the ACK field in the previous DCI, and 16 bits are respectively allocated to the ACK field and the ACK repetition field; since the uplink scheduling of the user may overlap with the subsequent DCI, at this time, the response message of the uplink transmission is carried in the latest DCI. A DL Allocation field indicates downlink scheduling resources, an UL Allocation field is used for indicating uplink scheduling resources, and the content contained in the DL/UL Allocation field is as shown in fig. 2, and is mainly used for carrying resource Allocation and scheduling information of a user, and is used for indicating which Channel (Channel ID) field in the figure is allocated to the user (Cell Radio network temporary Identifier, C-RNTI) field in the figure), where to Start (Start Indicator field in the figure), and how long to last (Duration field in the figure), and what Modulation and Coding Scheme (Modulation and Coding Scheme, MCS) field in the figure is adopted; r is a Reserved (Reserved) field; CRC is a cyclic redundancy check sequence, used forWhen the user is scheduled to transmit uplink, in addition to allocating a start indicator and a duration, an ACK index (index) resource needs to be allocated to indicate the specific bit position in the ACK field in the DCI, that is, which bits correspond to a previously scheduled user, and the ACK retransmission field in the subsequent DCI is the repetition of the ACK field in the first pieces of DCI, so as to improve the reliability of ACK transmission.

It should be noted that, after receiving the th DCI, the receiving module 12 may not add an acknowledgement feedback message corresponding to the th data packet indicated by the th DCI to the DCI after receiving the DCI, that is, the response feedback message included in the third DCIs and the response feedback message received by the receiving module 12 may be separated by preset time intervals, where the preset time intervals may be several DCI transmission cycles, and further , the th DCI, the second DCI, and the third DCIs separated by at least preset DCI separation times.

It is assumed that the second network device schedules two network devices in the nth DCI to be transmitted, and the network devices are network device a and 0 network device B. network device a and network device B, respectively, according to the scheduling information in the nth DCI, complete transmission of th data packet in corresponding channel and time, 4DCI intervals (interval) in the figure represent DCI periods, wherein the th data packet of the th network device a is transmitted in the th DCI interval, the th data packet of the th network device B is not transmitted in the th DCI interval, and is transmitted in the second DCI interval, the ACK field in the n +1 th DCI includes the acknowledgement feedback message of the th network device a, while the network device B with th transmission time overlapping the nth DCI transmission time, the ACK field in the nth DCI field, and the ACK field in the acknowledgement feedback field of the network device B +1 st DCI field is assumed to be repeated in the nth DCI feedback field of the current DCI feedback field, i.e. the network device B transmits ACK field of the acknowledgement feedback field 366 DCI + 7 st DCI field, i.e. the acknowledgement feedback field of the current DCI feedback field.

Further , the ACK Repetition field interval may also be configured to m DCIs, that is, the ACK field in the nth DCI may be repeated in the ACK Repetition field of the n + m DCI, so as to increase the time diversity gain and improve the ACK transmission reliability.

, at least third DCIs are response feedback messages for repeatedly transmitting data packets from the network device, and the interval between ACK/NACK messages is set in a predetermined time interval step-by-step manner, the number of the third DCIs and/or the predetermined DCI interval time length correspond to the coverage capability of the second network device.

, the network device provided in the above embodiment wherein the response feedback message includes an ACK message or a NACK message, the processing module 13 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.

Fig. 4 is a schematic structural diagram of a second network device according to an embodiment of the present invention, and as shown in fig. 4, the network device according to this embodiment includes:

the receiving module 41 is configured to receive the th data packet sent by the th 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, where a receiving module 41 in the second network device receives th data sent by the network device, where the th network device sends data to the second network device in a data packet manner, and if the data packet sent by the th network device to the second network device is the th data packet, after the th network device sends the th data packet, it waits to receive an acknowledgement feedback message of the th data packet sent by the second network device to determine whether the th data packet is sent successfully, and if not, it further retransmits the th data packet, where the acknowledgement feedback message includes an ACK or NACK message.

And the processing module 42 is used for determining th data packet is received normally.

Specifically, the processing module 42 is configured to determine whether the th data packet received by the receiving module 41 is normal, the processing module 42 may check the th data packet by any of the checking methods to determine whether the th data packet is received normally.

A sending module 43, configured to send at least two response feedback messages of the th data packet to the th network device, where 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.

Specifically, when the processing module 42 determines that the th data packet is received normally, the sending module 43 will send an ACK or NACK message of the th data packet to the th network device in order to improve the transmission reliability of the ACK/NACK message and to take into account that in the narrowband terminal system, the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously sent acknowledgement feedback messages cannot obtain a sufficient time diversity gain in the narrowband terminal system, therefore, in the present embodiment, the sending module 43 sends at least two acknowledgement feedback messages of the th data packet to the th network device, the at least two acknowledgement feedback messages are repeatedly set in the time domain, and the at least two acknowledgement feedback messages sequentially differ by preset repetition interval time in the time domain.

That is, the at least two acknowledgement feedback messages of the th data packet sent by the sending module 43 are not sent consecutively in time domain, but are sequentially different by a preset time interval, so the acknowledgement feedback message sent by the network device provided by this embodiment has a higher time diversity gain than the acknowledgement feedback message sent consecutively, the time diversity gain is higher the more the number of the at least two acknowledgement feedback messages is and the longer the preset time interval between the acknowledgement feedback messages is, the at least two acknowledgement feedback messages may be repeated in any repetition modes in the time domain of bit repetition, symbol repetition, code block repetition, transmission block repetition, frame repetition, etc. after the at least two acknowledgement feedback messages are received by the th network device, the at least two acknowledgement feedback messages are combined, so that the combined message will obtain a higher time diversity gain, the th network device determines whether the th data packet is sent successfully according to the at least two acknowledgement feedback messages.

In the network device provided by this embodiment, after receiving the data packet sent by the network device, at least two response feedback messages of the data packet are sent to the network device, where 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, so that the network device determines whether the data packet is successfully sent according to the at least two response feedback messages, thereby improving a time diversity gain for sending the response feedback messages, and improving reliability of the response feedback messages.

Further , in the embodiment shown in fig. 1, the number of at least two response feedback messages of the data packet and/or the preset repetition interval time of at least two response feedback messages of the data packet sent by the sending module 43 may be set in steps, the higher the time diversity gain of the response feedback messages, the higher the reliability of the response feedback messages, and accordingly, the stronger the coverage capability of the second network device, therefore, the number of at least two response feedback messages of the data packet, the preset repetition interval time of at least two response feedback messages of the data packet, or a combination of the two may be set in steps, and different steps correspond to different coverage capabilities.

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 a th DCI to a th network device before the receiving module 41 receives a th data packet sent by the th network device, where the th DCI includes transmission resource configuration information of the th data packet, and the th DCI includes transmission resource configuration information of a th data packet.

Specifically, the transmission resource used by the th network device to transmit the th data packet may be notified by the second network device, the second network device generally indicates the transmission resource of the th network device through DCI, the transmitting module 43 transmits th DCI to the network device, and the th DCI includes the transmission resource configuration information of the th data packet, after the th network device receives the th DCI, it is known that the transmission resource used to transmit the th data packet, the receiving module 41 receives the th data packet transmitted by the th network device on the transmission resource indicated by the th DCI, since the transmitting module 43 transmits the th network device periodically, each DCI sequentially differs from the in time domain by a preset repetition interval time, therefore, an ACK/NACK message may be added to the DCI transmitted by the th network device by the transmitting module 43, thereby implementing transmission of a response feedback message (DCI interval), that is, a DCI found in a fixed position, that is found in the network device when the DCI is found, i.e. when the DCI is found, the DCI is a downlink synchronization is found in the most simple network device found.

After transmitting the th DCI, the transmitting module 43 sequentially transmits a second DCI and at least third DCIs, where the second DCI and the at least third DCIs respectively include response feedback messages of a th data packet, so that the th network device may receive at least two response feedback messages of the th data packet, and the at least two response feedback messages sequentially differ from each other in time domain by preset repetition interval time.

The specific format of DCI and a schematic diagram of transmitting the response feedback message through DCI are shown in fig. 2 and 3.

It should be noted that, after the transmission module 43 transmits the th DCI, although the DCI is a DCI after continuous transmission, the response feedback message corresponding to the th data packet indicated by the th DCI may not be added to the continuous DCI, that is, preset time intervals may be set between the response feedback messages included in the second DCI and the at least third DCIs sent by the transmission module 43, where the preset time intervals may be several DCI transmission periods, and further step, at least preset DCI interval times are set between the th DCI, the second DCI, and the at least third DCI, respectively.

, in the network device provided in the embodiment shown in fig. 4, the response feedback message includes an ACK message or a NACK message, and the processing module 42 is specifically configured to instruct the sending module 43 to send at least two ACK messages of the th packet to the th network device if it is determined that the th packet is received normally, and instruct the sending module 43 to send at least two NACK messages of the th packet to the th network device if it is determined that the th packet is received abnormally.

Fig. 5 is a flowchart of an embodiment of a method for transmitting an acknowledgement message according to an embodiment of the present invention, and as shown in fig. 5, the method of the embodiment includes:

in step S501, the th network device sends th data packet to the second network device.

In step S502, the th network device receives 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 the time domain, and the at least two response feedback messages sequentially differ in the time domain by preset repetition interval time.

In step S503, the th network device determines whether the th data packet was successfully transmitted according to at least two response feedback messages.

The method for transmitting the response message provided in this embodiment is used to implement the technical solution of the network device shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.

Further , in the embodiment of fig. 5, the at least two acknowledgement feedback messages are arranged in repetitions in the time domain, in the following manner bit repetition, symbol repetition, code block repetition, transport block repetition, frame repetition.

Further , in the embodiment of fig. 5, the number of acknowledgement feedback messages and/or the preset repetition interval time length correspond to the coverage capability of the second network device.

Further , in the embodiment of fig. 5, the number of acknowledgement 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 a second embodiment of a method for transmitting a response message according to the embodiment of the present invention, and as shown in fig. 6, the method according to the embodiment includes:

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

In step S602, the th network device sends a th data packet to the second network device on the transmission resource indicated by the th DCI.

Step S603, the th network device sequentially receives the 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 a th data packet.

In step S604, the th network device determines whether the th data packet was successfully transmitted 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 acknowledgement feedback message, and the ACK repetition field in the third DCI carries the acknowledgement feedback message.

Further , in the embodiment shown in fig. 6, the DCI, the second DCI, and the at least third DCI are respectively separated by at least preset DCI separation times.

Further , in the embodiment shown in fig. 6, the number of the third DCI 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 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.

, in the embodiment shown in FIG. 5 or FIG. 6, the response feedback message includes an ACK message or a NACK message, and step S503 or step S604 includes that the network device determines that the data packet is successfully transmitted according to at least two ACK messages, or the network device determines that the data packet is unsuccessfully transmitted according to at least two NACK messages and determines to retransmit the data packet.

Fig. 7 is a flowchart of a third embodiment of a method for transmitting a response message according to the embodiment of the present invention, and as shown in fig. 7, the method according to the embodiment includes:

in step S701, the second network device receives the th data packet sent by the th network device.

In step S702, the second network device determines whether the data packet is received normally.

Step S703, the second network device sends at least two response feedback messages of the th data packet to the th network device, where 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 repeat interval times.

The method for transmitting the response message provided in this embodiment is used to implement the technical solution of the network device shown in fig. 4, and the implementation principle and the technical effect are similar, which are not described herein again.

Further , in the embodiment of fig. 7, the at least two acknowledgement feedback messages are arranged in repetitions in the time domain, in the following manner bit repetition, symbol repetition, code block repetition, transport block repetition, frame repetition.

Further , in the embodiment of fig. 7, the number of acknowledgement feedback messages and/or the preset repetition interval time length correspond to the coverage capability of the second network device.

Further , in the embodiment of fig. 7, the number of acknowledgement 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 a fourth embodiment of a method for transmitting a response message according to the embodiment of the present invention, as shown in fig. 8, the method according to the embodiment includes:

step S801, the second network device sends th DCI to the th network device, where the th DCI includes the transmission resource configuration information of the th data packet.

In step S802, the second network device receives a th data packet sent by the th network device on the transmission resource indicated by the th DCI.

In step S803, the second network device determines th packet is received normally.

Step S804, the second network device sequentially sends the second DCI and at least third DCIs to the th network device, where the second DCI and the at least third DCI each include a response feedback message of a th data packet.

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

Further , in the embodiment shown in fig. 8, the DCI, the second DCI, and the at least third DCI are respectively separated by at least preset DCI separation times.

Further , in the embodiment shown in fig. 8, the number of the third DCI 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 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.

, in the embodiment shown in fig. 7 or fig. 8, the acknowledgement feedback message includes an ACK message or a NACK message, and the second network device sends at least two acknowledgement feedback messages of the th data packet to the th network device, including sending at least two ACK messages of the th data packet to the th network device if the second network device determines that the th data packet is received normally, and sending at least two NACK messages of the th data packet to the th network device if the second network device determines that the th data packet is received abnormally.

It should be noted that the sending module 11 in the embodiment of the present invention may correspond to a sender of a network device, and may also correspond to a transceiver of the network device, the receiving module 12 may correspond to a receiver of the network device, and may also correspond to a transceiver of the network device, and the Processing module 13 may correspond to a processor in the network device, where the processor may be Central Processing Units (CPUs), or an Application Specific Integrated Circuit (ASIC), or or more integrated circuits that implement the embodiment of the present invention.

The receiving module 41 in the embodiment of the present invention may correspond to a receiver of a network device, and may also correspond to a transceiver of the network device, the transmitting module 43 may correspond to a transmitter of the network device, and may also correspond to a transceiver of the network device, the processing module 42 may correspond to a processor of the network device, where the processor may be CPUs, or ASICs, or or more integrated circuits that implement the embodiment of the present invention, the network device may further include a memory, and the memory is used to store instruction codes, and the processor calls the instruction codes of the memory to control the receiving module 41, the transmitting module 43, and the processing module 42 in the embodiment of the present invention to perform the above operations.

It will be understood by those skilled in the art that all or a portion of the steps of implementing the various method embodiments described above may be performed by hardware associated with program instructions, and that the program may be stored in a computer readable storage medium, which when executed performs the steps comprising the various method embodiments described above, including ROM, RAM, magnetic or optical disks, among various media capable of storing program code.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: it is also possible to modify the solutions described in the previous embodiments or to substitute some or all of them with equivalents. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

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

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;

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;

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

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;

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;

19, A method for transmitting reply messages, comprising:

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

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;

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;

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 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;

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;