WO2016172818A1 - Procédé de transmission de message de réponse et dispositif de réseau - Google Patents

Procédé de transmission de message de réponse et dispositif de réseau Download PDF

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Publication number
WO2016172818A1
WO2016172818A1 PCT/CN2015/077487 CN2015077487W WO2016172818A1 WO 2016172818 A1 WO2016172818 A1 WO 2016172818A1 CN 2015077487 W CN2015077487 W CN 2015077487W WO 2016172818 A1 WO2016172818 A1 WO 2016172818A1
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Prior art keywords
network device
dci
data packet
response feedback
repetition
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PCT/CN2015/077487
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English (en)
Chinese (zh)
Inventor
于光炜
罗之虎
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201580070094.2A priority Critical patent/CN107113118B/zh
Priority to PCT/CN2015/077487 priority patent/WO2016172818A1/fr
Publication of WO2016172818A1 publication Critical patent/WO2016172818A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems

Definitions

  • the embodiments of the present invention relate to the field of wireless communications technologies, and in particular, to a response message transmission method and a network device.
  • M2M Machine to Machine
  • 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 users.
  • a narrowband terminal In order to cope with the above requirements in M2M communication, in a future communication system, there may be a new type of terminal that supports a narrower bandwidth, which may be referred to as a narrowband terminal.
  • the narrowband terminal has a low data transmission rate, and the transmission and reception processes are simpler, which is advantageous for the low cost and low power consumption of the terminal.
  • narrowband terminals At the same transmit power, narrowband terminals have higher Power Spectral Density (PSD) than wider bandwidth terminals, which can resist more transmission loss and achieve enhanced coverage. With a given spectrum bandwidth, narrowband terminals use a narrower frequency, thus allowing more terminals to communicate simultaneously. Therefore, the narrowband terminal meets the requirements of the M2M terminal for low cost, low power consumption, strong network coverage capability, and support for more users. It is M2M. A preferred solution for the terminal.
  • PSD Power Spectral Density
  • the sender pauses every time a packet is sent, waiting for a confirmation message from the receiver.
  • the receiving end detects it. If the receiving end is correct, the receiving end will return an Acknowledgement (ACK) message to the transmitting end. If the receiving fails, the receiving end will return a negative acknowledgement to the transmitting end (Negative Acknowledgement). , NACK) message.
  • ACK Acknowledgement
  • NACK negative acknowledgement
  • the sender receives the ACK message, it continues to send the new data packet; when the sender receives the NACK message, it will resend the last transmitted data packet.
  • the sender needs to determine the time and manner of sending the data packet according to the ACK/NACK message. Therefore, it is particularly important to improve the reliability of ACK/NACK message transmission.
  • methods for improving the reliability of ACK/NACK message transmission mainly include: repeated coding and repeated ACK/NACK, and a combination of the two.
  • the method of repeated coding reduces the effectiveness of the transmission, and the repeated ACK/NACK method is to repeatedly transmit multiple ACK/NACK messages on consecutive subframes.
  • Narrowband terminals are generally used in static environments or low-speed mobile environments, with low moving rates and low Doppler shifts. The lower the Doppler shift, the longer the corresponding channel coherence time.
  • the current method for improving the reliability of ACK/NACK message transmission uses continuous time repetition. For a narrowband terminal system with a long channel coherence time, sufficient time diversity gain cannot be obtained, or it takes longer to obtain sufficient time. Diversity gain.
  • the embodiment of the invention provides a response message transmission method and a network device, which improves the time diversity gain of the response feedback message, thereby improving the reliability of the response feedback message.
  • the first aspect provides a network device, where the network device is a first network device, and the network device includes:
  • a sending module configured to send a 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, where the at least two response feedback messages are repeatedly set in a time domain, and At least two response feedback messages are sequentially different in the time domain by a preset repetition interval;
  • a processing module configured to determine, according to the at least two response feedback messages, whether the first data packet is successfully sent.
  • the at least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, The transport block is repeated and the frame is repeated.
  • the number of the response feedback message and/or the preset repetition interval length is The coverage capability of the second network device corresponds.
  • the number of the response feedback messages is directly proportional to the coverage capability of the second network device, where the preset repetition is The length of the interval is proportional to the coverage capability of the second network device.
  • 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 a first DCI that is sent, 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 the at least one third DCI sent by the second network device, where the second DCI and the at least one third DCI respectively include the first data packet Response feedback message.
  • an ACK field in the second DCI carries the acknowledgement feedback message, and an ACK in the third DCI is repeated.
  • the field carries the response feedback message.
  • the first DCI, the second DCI, and the at least one third DCI At least one preset DCI interval is respectively separated.
  • the number of the third DCI and/or the preset DCI interval time length and the second network The coverage capability of the device corresponds.
  • the quantity of the third DCI is directly proportional to the coverage capability of the second network device, where the preset The length of the DCI interval is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message
  • the processing module is configured to determine that the first data packet is successfully sent according to the at least two ACK messages, or determine that the first data packet fails to be sent according to the at least two NACK messages, and determine to retransmit the first data packet. .
  • the second aspect provides a network device, where the network device is a second network device, where the network device includes:
  • a receiving module configured to receive a 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, to the first network device, at least two response feedback messages of the first data packet, where the at least two response feedback messages are repeatedly set in a time domain, and the at least two response feedbacks The messages differ by a preset repeat interval in time domain.
  • the at least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, The transport block is repeated and the frame is repeated.
  • the number of the response feedback message and/or the preset repetition interval length is The coverage capability of the second network device corresponds.
  • the number of the response feedback messages is directly proportional to the coverage capability of the second network device, where the preset repetition is The length of the interval is proportional to the coverage capability of the second network device.
  • the sending module is further configured to: before the receiving module receives the first data packet sent by the first network device, to the first network device Transmitting 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, by the first network device, the first DCI indication Transmitting the first data packet on the transmission resource;
  • the sending module is specifically configured to send a second DCI and at least one third DCI to the first network device, where the second DCI and the at least one third DCI respectively include the first data packet. Answer the feedback message.
  • the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK in the third DCI is repeated.
  • the field carries the response feedback message.
  • the first DCI, the second DCI, and the at least one third DCI At least one preset DCI interval is respectively separated.
  • the number of the third DCI and/or the preset DCI interval time length and the second network The coverage capability of the device corresponds.
  • the quantity of the third DCI is directly proportional to the coverage capability of the second network device, where the preset The length of the DCI interval is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message
  • the processing module is configured to: if it is determined that the first data packet is received normally, instruct the sending module to send the at least two ACK messages of the first data packet to the first network device; If the first data packet is not received properly, the sending module is instructed to send the at least two NACK messages of the first data packet to the first network device.
  • the third aspect provides a response message transmission method, including:
  • the at least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, The transport block is repeated and the frame is repeated.
  • the number of the response feedback message and/or the preset repetition interval length is The coverage capability of the second network device corresponds.
  • the quantity of the response feedback message is directly proportional to the coverage capability of the second network device, where the preset repetition is The length of the interval is proportional to the coverage capability of the second network device.
  • the method before the first network device sends the first data packet to the second network device, the method further includes:
  • the ACK field in the second DCI carries the acknowledgement feedback message, and the ACK repeat field in the third DCI Carrying the response feedback message.
  • the first DCI, the second DCI, and the at least one third DCI At least one preset DCI interval is respectively separated.
  • the number of the third DCI and/or the preset DCI interval time length and the second network The coverage capability of the device corresponds.
  • the quantity of the third DCI is directly proportional to the coverage capability of the second network device, where the preset The length of the DCI interval is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message
  • Determining, by the first network device, whether the first data packet is successfully sent according to the at least two response feedback messages including:
  • the first network device Determining, by the first network device, that the first data packet is sent successfully according to the at least two ACK messages, or the first network device determining, according to the at least two NACK messages, that the first data packet is sent and determining to retransmit the The first packet.
  • the fourth aspect provides a response message transmission method, including:
  • the at least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, The transport block is repeated and the frame is repeated.
  • the number of the response feedback message and/or the preset repetition interval length and the The coverage capability of the second network device corresponds.
  • the quantity of the response feedback message is directly proportional to the coverage capability of the second network device, where the preset repetition is The length of the interval is proportional to the coverage capability of the second network device.
  • the method before the receiving, by the second network device, the first data packet sent by the first network device, the method further includes:
  • Receiving, by the second network device, the first data packet sent by the first network device including:
  • the second network device sends a second DCI and at least one third DCI to the first network device, where the second DCI and the at least one third DCI respectively include response feedback of the first data packet. Message.
  • the ACK field in the second DCI carries the response feedback message, and the ACK in the third DCI is repeated.
  • the field carries the response feedback message.
  • the first DCI, the second DCI, and the at least one third DCI At least one preset DCI interval is respectively separated.
  • the number of the third DCI and/or the preset DCI interval time length and the second network The coverage capability of the device corresponds.
  • the quantity of the third DCI is directly proportional to the coverage capability of the second network device, where the preset The length of the DCI interval is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message
  • 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; The network device determines that the first data packet is not received normally, and the second network device sends at least two NACK messages of the first data packet to the first network device.
  • the response message transmission method and the network device provided by the embodiment of the present invention are in the second network After transmitting the first data packet, the device receives at least two response feedback messages of the first 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 feedbacks The message is sequentially different in the time domain by a preset repetition interval, and then determining, according to the at least two response feedback messages, whether the first data packet is successfully sent, and improving the time diversity gain of the received response feedback message, thereby improving The reliability of the response feedback message.
  • FIG. 1 is a schematic structural diagram of Embodiment 1 of a network device according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a 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 according to an embodiment of the present disclosure
  • FIG. 5 is a flowchart of Embodiment 1 of a method for transmitting a response message according to an embodiment of the present invention
  • FIG. 6 is a flowchart of Embodiment 2 of a method for transmitting a response message according to an embodiment of the present invention
  • FIG. 7 is a flowchart of Embodiment 3 of a method for transmitting a response message according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of Embodiment 4 of a method for transmitting a response message according to an embodiment of the present invention.
  • the network device in the wireless communication system can be divided into two types: a transmitting end and a receiving end.
  • the transmitting end and the receiving end are not fixed attributes of the network device.
  • network devices in a wireless communication system have the ability to transmit data and receive data at the same time, that is, as a network device.
  • the sender can also act as a receiver.
  • a network device that transmits data is referred to as a first network device
  • 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 status of the network device.
  • FIG. 1 is a schematic structural diagram of Embodiment 1 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.
  • the network device provided in this embodiment is a data sending end in the wireless communication system, that is, the first network device.
  • the transmitting module 11 in the first network device transmits data to the second network device within the channel allocated thereto, wherein the first network device transmits data to the second network device in the manner of a data packet.
  • the data packet sent by the first network device to the second network device is the first data packet, and after the first network device sends the first data packet, the first network device waits 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 the transmission is not successful, the first data packet is retransmitted.
  • the response 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, where the at least two response feedback messages are repeatedly set in the time domain, and the at least two response feedback messages are sequentially in the time domain.
  • the difference is a preset repeat interval.
  • the receiving module 12 in the first network device will receive the ACK or NACK message sent by the second network device.
  • the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously transmitted response feedback message cannot be obtained 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 responses are The feedback messages are sequentially different in the time domain by a preset repetition interval.
  • At least two response feedback messages of the first data packet received by the receiving module 12 are not continuously transmitted in the time domain, but are sequentially different by a predetermined time interval.
  • the response feedback message received by the network device provided by this embodiment will have a higher time diversity gain than the continuously received response feedback message.
  • the at least two response feedback messages may be any one of time domain according to bit repetition, symbol repetition, code block repetition, transport block repetition, frame repetition, and the like. Repeat in a repeating manner.
  • the processing module 13 is configured to determine, according to the at least two response feedback messages, whether the first data packet is successfully sent.
  • 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.
  • the processing module 13 determines, according to the at least two response feedback messages, whether the first data packet is successfully transmitted with higher reliability.
  • the method for determining whether the first data packet is successfully sent is determined by the processing module 13 according to the at least two response feedback messages, which is the same as the current method for continuously sending the response feedback message, and details are not described herein again.
  • the network device receives at least two response feedback messages of the first data packet sent by the second network device, after the first data packet is sent to the second network device, where the at least two response feedback messages are Repeating the setting in the time domain, and the at least two response feedback messages are sequentially different in the time domain by a preset repetition interval, and determining, according to the at least two response feedback messages, whether the first data packet is successfully sent, and improving The time diversity gain of the received response feedback message increases the reliability of the response feedback message.
  • 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 are different in the time domain.
  • the preset repeat interval can be set in binning. The higher the time diversity gain of the response feedback message, the higher the reliability of the response feedback message, and accordingly, the greater the coverage capability of the second network device. Therefore, the number of at least two response feedback messages of the first data packet, the preset repetition interval time of the at least two response feedback messages of the first data packet in the time domain, or a combination of the two may be performed.
  • Split file settings, different bins correspond to different coverage capabilities.
  • the first network device and the second network device may agree in advance on the number of the response feedback message, the correspondence between the preset repetition interval time and the coverage capability of the second network device, so that the coverage capability binning can be notified only by signaling. Thereby the signaling overhead can be reduced.
  • the number of response feedback messages is proportional to the coverage capability of the second network device
  • the preset repetition interval length is proportional to the coverage capability of the second network device. That is to say, the more 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 more the number of response feedback messages, or the preset repetition interval length, can obtain a higher time diversity gain, and thus the coverage capability corresponding to the second network device is stronger.
  • the second network device may not turn on the repeat mode or turn on the interval repeat mode. That is to say, the coverage capability of the second network device can be adjusted.
  • the unit of the preset repetition interval may be a slot or a frame.
  • a plurality of mapping tables may be defined, and the mapping table may be notified by the system broadcast to the first network device and the second network device.
  • the receiving module 12 is further configured to receive before the sending module 11 sends the first data packet to the second network device.
  • the first downlink control information Downlink Control Information, DCI
  • the sending module 11 is 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 configured to receive, in sequence, a second DCI sent by the second network device, and at least one third DCI, where the second DCI and the at least one third DCI respectively include a response message of the first data packet.
  • the ACK field in the second DCI carries a response feedback message
  • the ACK repetition field in the third DCI carries a response feedback message.
  • 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 by using the 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.
  • the receiving module 12 can know the transmission resource used to send 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 is sequentially different by a preset repetition interval in the time domain.
  • an ACK/NACK message may be added to the DCI sent by the second network device to the first network device, thereby implementing transmission of the response feedback message.
  • DCI interval which is the DCI period.
  • the DCI always appears in a fixed position within the DCI interval, that is, after the first network device completes the downlink synchronization, the boundary of the DCI interval is found, and the DCI location can be found.
  • the simplest approach is that DCI appears at the beginning of the DCI interval.
  • the receiving module 12 After receiving the first DCI, the receiving module 12 sequentially receives the second DCI and the at least one third DCI, where the second DCI and the at least one third DCI include the 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 are sequentially different in the time domain by a preset repetition interval.
  • DCI includes downlink number (DL number), uplink number (UL number), ACK, ACK repetition, DL Allocation, UL Allocation, R, and Cyclic Redundancy Check , CRC) field.
  • DL number downlink number
  • UL number uplink number
  • ACK acknowledgement
  • ACK repetition DL Allocation
  • UL Allocation UL Allocation
  • R Cyclic Redundancy Check
  • the DL number field indicates the number of downlink scheduling users in the DCI
  • ACK field For the response message indicating the uplink user transmission of the previous DCI scheduling, the ACK repetition field is a repetition of the ACK field in the previous DCI, and each of them allocates 16 bits; since the uplink scheduling of the user overlaps with the subsequent DCI, the uplink transmission is performed at this time.
  • the reply message is carried in the subsequent DCI.
  • the DL Allocation field is used to indicate the downlink scheduling resource
  • the UL Allocation field is used to indicate the uplink scheduling resource.
  • the content of the DL/UL Allocation field is as shown in FIG. 2, and the resource allocation and scheduling information of the primary bearer is used to indicate the user (the cell in the figure).
  • the Cell Radio Network Temporary Identifier (C-RNTI) field specifies which channel (Channel ID field in the figure), where to start (Start Indicator field in the figure), continues How long (Duration field in the figure), which modulation coding method (Modulation and Coding Scheme (MCS) field); R is the reserved field; CRC is cyclic redundancy Test sequence for error detection.
  • C-RNTI Cell Radio Network Temporary Identifier
  • an ACK index resource is also allocated to indicate a 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 a repetition of the ACK field in the previous DCI for improving the reliability of the ACK transmission.
  • the ACK/NACK of the uplink transmission information may be sent in the subsequent DCI.
  • the ACK repetition field is added to improve the reliability of the ACK transmission.
  • the receiving module 12 is the DCI after the continuous reception, but the response feedback message corresponding to the first data packet indicated by the first DCI may not be added in the continuous DCI. That is, the second DCI received by the receiving module 12 and the response feedback message included in the at least one third DCI may be separated by a preset time interval, and the preset time interval may be a transmission period of several DCIs. Further, the first DCI, the second DCI, and the at least one third DCI are respectively separated by at least one preset DCI interval time.
  • FIG. 3 is a schematic diagram of sending a response feedback message through DCI.
  • the second network device is transmitting
  • Two first network devices are scheduled in the nth DCI, 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 in the figure represents a DCI period, in which the first data packet of the first network device A is transmitted within the first DCI interval, and the first data packet of the first network device B is in the first DCI.
  • the transmission has not been completed within the interval, and the transmission is completed within the second DCI interval.
  • the ACK field in the n+1th DCI includes the response feedback message of the first network device A. Since the transmission time of the first network device B overlaps with the n+1th DCI, the ACK field in the n+2 DCI includes the response feedback message of the first network device B.
  • the ACK repetition field in the n+2 DCI includes a repetition of the response message of the first network device A. In the diagram shown in FIG. 3, it is assumed that the repetition interval of the ACK Repetition field is one DCI interval, that is, the ACK field in the current nth DCI, and the ACK Repetition in the subsequent n+1th DCI is repeatedly transmitted, that is, Interval between one DCI interval.
  • the ACK re-sequence interval may also be configured as m DCIs, that is, the ACK field in the n-th DCI may be repeated in the ACK Repetition field of the n+m DCIs, increasing the time diversity gain, and improving the ACK transmission reliability.
  • the at least one third DCI is a response feedback message for repeatedly transmitting the first network device to send the first data packet, and the interval between the ACK/NACK messages is preset by a predetermined time interval, and the third DCI is The number and/or the preset DCI interval length corresponds to the coverage capability of the second network device.
  • the number of the third DCI is proportional to the coverage capability of the second network device, and the preset DCI interval length is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message.
  • the processing module 13 is configured to determine that the first data packet is successfully sent according to the at least two ACK messages, or determine that the first data packet is sent according to the at least two NACK messages, and determine 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.
  • the network device provided in this embodiment is a data receiving end in the wireless communication system, that is, a second network device.
  • the receiving module 41 in the second network device receives the number sent by the first network device
  • the first network device sends data to the second network device in a manner of data packets.
  • the data packet sent by the first network device to the second network device is the first data packet, and after the first network device sends the first data packet, the first network device waits to receive the response feedback message of the first data packet sent by the second network device.
  • the response feedback message includes an ACK or NACK message.
  • the processing module 42 is configured to determine whether the first data packet is received normally.
  • 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 may check the first data packet by any one of the verification methods to determine whether the first data packet is received normally. Conventional verification methods such as parity.
  • the sending module 43 is configured to send, to the first network device, at least two response feedback messages of the first data packet, where 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.
  • the sending module 43 when the processing module 42 determines whether the first data packet is normal, the sending module 43 will send an ACK or NACK message of the first data packet to the first network device.
  • the transmission reliability cannot be increased by increasing the frequency diversity gain, and the continuously transmitted response feedback message cannot be obtained 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 feedbacks The messages are sequentially different in time domain by a preset repetition interval.
  • At least two response feedback messages of the first data packet sent by the sending module 43 are not continuously transmitted in the time domain, but are sequentially different by a preset time interval.
  • the response feedback message sent by the network device provided by this embodiment will have a higher time diversity gain than the continuously sent response feedback message.
  • the at least two response feedback messages may be repeated in any one of the repeating manners in the time domain such as bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.
  • the first network device After the first network device receives the at least two response feedback messages, the at least two response feedback messages are synthesized, so that the synthesized message will obtain a higher time diversity gain.
  • the first network device determines, according to the at least two response feedback messages, whether the first data packet is successfully transmitted with higher reliability.
  • 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 the first network device is sent by the first network device, where the at least two response feedback messages are in time. Repeating the setting on the domain, and the at least two response feedback messages are sequentially different in the time domain by a preset repetition interval, so that the first network device determines, according to the at least two response feedback messages, whether the first data packet is sent. Success, the time diversity gain of the response feedback message is increased, thereby improving the reliability of the response feedback message.
  • 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 are different in the time domain.
  • the preset repeat interval can be set in binning. The higher the time diversity gain of the response feedback message, the higher the reliability of the response feedback message, and accordingly, the greater the coverage capability of the second network device. Therefore, the number of at least two response feedback messages of the first data packet, the preset repetition interval time of the at least two response feedback messages of the first data packet in the time domain, or a combination of the two may be performed.
  • Split file settings, different bins correspond to different coverage capabilities.
  • the first network device and the second network device may agree in advance on the number of the response feedback message, the correspondence between the preset repetition interval time and the coverage capability of the second network device, so that the coverage capability binning can be notified only by signaling. Thereby the signaling overhead can be reduced.
  • the number of response feedback messages is proportional to the coverage capability of the second network device
  • the preset repetition interval length is proportional to the coverage capability of the second network device. That is to say, the more 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 more the number of response feedback messages, or the preset repetition interval length, can obtain a higher time diversity gain, and thus the coverage capability corresponding to the second network device is stronger.
  • the second network device may not turn on the repeat mode or turn on the interval repeat mode. That is to say, the coverage capability of the second network device can be adjusted.
  • the unit of the preset repetition interval may be a slot or a frame.
  • a plurality of mapping tables may be defined, and the mapping table may be notified by the system broadcast to the first network device and the second network device.
  • the sending module 43 is further configured to: before the receiving module 41 receives the first data packet sent by the first network device, Transmitting, by the first network device, a first DCI, where the first DCI includes the first data packet
  • the transmission resource configuration information includes the transmission resource configuration information of the first data packet in the first DCI.
  • the receiving module 41 is specifically configured to receive the first data packet that is sent by the first network device on the transmission resource indicated by the first DCI.
  • the sending module 43 is specifically configured to sequentially send the second DCI and the at least one third DCI to the first network device, where the second DCI and the at least one third DCI respectively include a response feedback message of the first data packet.
  • the ACK field in the second DCI carries a response feedback message
  • the ACK repetition field in the third DCI carries a response feedback message.
  • 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 by using the 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 can learn the transmission resource used to send 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 is sequentially different by a preset repetition interval in the time domain.
  • the ACK/NACK message can be added to the DCI sent by the sending module 43 to the first network device, thereby implementing the transmission of the response feedback message.
  • DCI interval which is the DCI period.
  • the DCI always appears in a fixed position within the DCI interval, that is, after the first network device completes the downlink synchronization, the boundary of the DCI interval is found, and the DCI location can be found.
  • the simplest approach is that DCI appears at the beginning of the DCI interval.
  • the sending module 43 sequentially sends the second DCI and the at least one third DCI, where the second DCI and the at least one third DCI include the response feedback message of the first data packet.
  • 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 are sequentially different by a preset repetition interval in the time domain.
  • FIGS. 2 and 3 A detailed format of the DCI and a schematic diagram of transmitting a response feedback message through the DCI are shown in FIGS. 2 and 3.
  • the sending module 43 is the DCI after the continuous transmission, but the response feedback message corresponding to the first data packet indicated by the first DCI may not be added in the continuous DCI. That is, the second DCI sent by the sending module 43 and the response feedback message included in the at least one third DCI may be separated by a preset time interval, and the preset time interval may be a transmission period of several DCIs. Further, the first DCI, the second DCI, and the at least one third DCI are respectively separated by at least one preset DCI interval time.
  • the at least one third DCI is a response feedback message for repeatedly transmitting the first network device to send the first data packet, and the interval between the ACK/NACK messages is preset by a predetermined time interval, and the third DCI is The number and/or the preset DCI interval length corresponds to the coverage capability of the second network device.
  • the number of the third DCI is proportional to the coverage capability of the second network device, and the preset DCI interval length is proportional to the coverage capability of the second network device.
  • the response feedback message includes an ACK message or a NACK message.
  • the processing module 42 is specifically configured to: if the first data packet is received normally, the sending module 43 sends the 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 not received normally, the indication is 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 response message according to an embodiment of the present invention. As shown in FIG. 5, the method in this embodiment includes:
  • Step S501 The first network device sends the 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, where 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 difference is a preset repeat interval.
  • Step S503 The first network device determines, according to the at least two response feedback messages, whether the first data packet is successfully sent.
  • the acknowledgment 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 effects thereof are similar, and details are not described herein again.
  • At least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.
  • the number of response feedback messages and/or the preset repetition interval length corresponds to the coverage capability of the second network device.
  • the number of response feedback messages is proportional to the coverage capability of the second network device
  • the preset repetition interval 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 response message according to an embodiment of the present invention. As shown in FIG. 6, the method in 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 sent by the second network device and the at least one third DCI, and the second DCI and the at least one third DCI respectively include a response feedback message of the first data packet.
  • Step S604 The first network device determines, according to the at least two response feedback messages, whether the first data packet is successfully sent.
  • the ACK field in the second DCI carries a response feedback message
  • the ACK repetition field in the third DCI carries a response feedback message
  • the first DCI, the second DCI, and the at least one third DCI are respectively separated by at least one preset DCI interval time.
  • the number of third DCIs and/or the preset length of the DCI interval corresponds to the coverage capability of the second network device.
  • the number of the third DCI is proportional to the coverage capability of the second network device
  • the preset DCI interval length is proportional to the coverage capability of the second network device
  • the response feedback message includes an ACK message or a NACK message; and step S503 or step S604 includes: the first network device determines, according to the at least two ACK messages, that the first data packet is successfully sent, Or the first network device determines, according to the at least two NACK messages, that the first data packet is sent and determines to retransmit the first data packet.
  • FIG. 7 is a flowchart of Embodiment 3 of a method for transmitting a response message according to an embodiment of the present invention. As shown in FIG. 7, the method in 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, where at least two response feedback messages are repeatedly set in the time domain, and at least two response feedback messages are sequentially in the time domain.
  • the difference is a preset repeat interval.
  • the acknowledgment 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 effects thereof are similar, and details are not described herein again.
  • At least two response feedback messages are repeatedly set in the time domain in one of the following manners: bit repetition, symbol repetition, code block repetition, transport block repetition, and frame repetition.
  • the number of response feedback messages and/or the preset repetition interval length corresponds to the coverage capability of the second network device.
  • the number of response feedback messages is proportional to the coverage capability of the second network device
  • the preset repetition interval 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 response message according to an embodiment of the present invention. As shown in FIG. 8, the method in 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 sends the second DCI and the at least one third DCI to the first network device, and the second DCI and the at least one third DCI respectively include a response feedback message of the first data packet.
  • the ACK field in the second DCI carries a response feedback message
  • the ACK repetition field in the third DCI carries a response feedback message
  • the first DCI, the second DCI, and the at least one third DCI are respectively separated by at least one preset DCI interval time.
  • the number of third DCIs and/or the preset length of the DCI interval corresponds to the coverage capability of the second network device.
  • the number of the third DCI is proportional to the coverage capability of the second network device
  • the preset DCI interval length is proportional to the coverage capability of the second network device
  • 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: The second network device determines that the first data packet is received normally, and the second network device sends the at least two ACK messages of the first data packet to the first network device; If the first data packet is not received properly, the second network device sends at least two NACK messages of the first data packet to the first network device.
  • 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 the network device, or may correspond to a transceiver of the network device.
  • the processing module 13 may correspond to a processor in the network device, where the processor may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or implement the implementation of the present invention. An example of one or more integrated circuits.
  • the network device may further include a memory for storing the instruction code, the processor invoking the instruction code of the memory, and controlling the transmitting 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 the network device, or may correspond to a transceiver of the network device.
  • the sending module 43 may correspond to a transmitter of the network device, or may correspond to a transceiver of the network device.
  • Processing module 42 may correspond to a processor of a network device, where the processor may be a CPU, or an ASIC, or one or more integrated circuits that implement embodiments of the present invention.
  • the network device may further include a memory for storing the instruction code, the processor invoking the instruction code of the memory, and controlling 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.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un procédé de transmission de message de réponse et un dispositif de réseau. Selon le procédé de transmission de message de réponse : un premier dispositif de réseau envoie un premier paquet de données à un second dispositif de réseau ; le premier dispositif de réseau reçoit au moins deux messages de rétroaction de réponse du premier paquet de données envoyé par le second dispositif de réseau, les au moins deux messages de rétroaction de réponse étant établis de manière répétée dans un domaine temporel, et une différence d'un intervalle de temps de récurrence pré-établi existant entre les au moins deux messages de rétroaction de réponse dans le domaine temporel en séquence ; et le premier dispositif de réseau détermine si le premier paquet de données est envoyé avec succès selon les au moins deux messages de rétroaction de réponse. Le procédé de transmission de message de réponse et le dispositif de réseau décrits dans les modes de réalisation de la présente invention permettent d'améliorer le gain de diversité temporelle d'un message de rétroaction de réponse, ce qui permet d'améliorer la fiabilité du message de rétroaction de réponse.
PCT/CN2015/077487 2015-04-27 2015-04-27 Procédé de transmission de message de réponse et dispositif de réseau WO2016172818A1 (fr)

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