WO2019114730A1 - Procédé et dispositif de réception et d'émission de données, et système de communication - Google Patents

Procédé et dispositif de réception et d'émission de données, et système de communication Download PDF

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Publication number
WO2019114730A1
WO2019114730A1 PCT/CN2018/120470 CN2018120470W WO2019114730A1 WO 2019114730 A1 WO2019114730 A1 WO 2019114730A1 CN 2018120470 W CN2018120470 W CN 2018120470W WO 2019114730 A1 WO2019114730 A1 WO 2019114730A1
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WIPO (PCT)
Prior art keywords
network device
terminal
data block
data
target network
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PCT/CN2018/120470
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English (en)
Chinese (zh)
Inventor
郑黎丽
秦龙
纪刘榴
董朋朋
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华为技术有限公司
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Publication of WO2019114730A1 publication Critical patent/WO2019114730A1/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
    • 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 present application relates to the field of communications, and more particularly to techniques related to data block retransmission.
  • CoMP coordinated multi-point
  • JP joint processing
  • CS/CB coordinated scheduling/beamforming
  • JT joint transmission
  • DPS/DCS dynamic point/cell selection
  • JT refers to the terminal receiving physical downlink shared channel information from multiple network devices, and coherently or non-coherently combining the information, thereby improving the quality of the received signal and suppressing interference of other terminals.
  • the advantage of JT is that it can improve system spectral efficiency, enhance cell coverage, and convert inter-cell interference into desired signals.
  • JT can be divided into coherent JT (coherent JT) and non-coherent JT (NC-JT).
  • coherent JT multiple network devices jointly precode the signals sent to one terminal, and the cooperation between such multiple network devices has strict requirements for backhaul information exchange.
  • NC-JT multiple network devices that transmit signals to terminals perform independent precoding.
  • LTE long term evolution
  • HARQ hybrid automatic repeat request
  • MAC media access control
  • RLC radio link control
  • the terminal needs to send a positive answer (acknowledgement, ACK) to each demodulated correct codeword (CW), and a negative acknowledgment (NACK) for each demodulated failed codeword, and the network device feedback NACK.
  • ACK positive answer
  • NACK negative acknowledgment
  • the codeword needs to be retransmitted one or more times until the terminal demodulates successfully.
  • the network device retransmits the codewords that feed back the NACK, wasting downlink transmission resources.
  • the embodiment of the present invention provides a method, a device, and a system for selecting one data block from two or more data blocks for retransmission, thereby achieving the purpose of reducing the number of transmissions and saving downlink transmission resources.
  • the embodiment of the present application provides a data receiving method, where a terminal receives M data blocks sent by a network device, and N data blocks in the M data blocks receive errors, where M and N are integers. And M ⁇ N ⁇ 2; the terminal instructs the target network device corresponding to one of the N data blocks to retransmit the one data block.
  • the data receiving method can reduce the number of data block retransmissions and save downlink transmission resources.
  • the network device may include the target network device.
  • the terminal indicates that the target network device corresponding to one of the N data blocks retransmits the one data block, including: the terminal to the target network The device sends information, where the information is used to instruct the target network device to retransmit the one data block.
  • the hybrid automatic repeat request HARQ feedback message including the information is agreed by the terminal and the network device, and the terminal sends the location to the target network device by using the HARQ feedback message.
  • Information is agreed by the terminal and the network device, and the terminal sends the location to the target network device by using the HARQ feedback message.
  • the information is located in a bitmap bitmap.
  • the terminal performs HARQ feedback on the code block group (CBG) level of the target network device, and a bit is added to the bit bitmap bitmap that can be used to indicate that the target network device performs the data block. Retransmission. Compared with the HARQ feedback at the block level, unnecessary retransmission can be further reduced, and downlink transmission resources are saved.
  • CBG code block group
  • the terminal sends the information to the target network device by using the HARQ feedback message.
  • the terminal helps the terminal to indicate a data block that needs to be retransmitted by predefining a new meaning of the HARQ message with the network device.
  • the terminal can be instructed to retransmit the data block without adding additional fields or uplink transmission resources.
  • the terminal indicates, by the resource allocated by the network device, that the target network device retransmits the one data block. This method can save signaling overhead.
  • the embodiment of the present application provides a data transmission method, where a target network device sends a data block to a terminal, where the data block is an N data that is received by the network device in the M data blocks sent to the terminal.
  • the target network device retransmits the data block according to the indication of the terminal.
  • the network device may include the target network device.
  • the target network device retransmits the data block according to the indication of the terminal, where the network device receives information sent by the terminal, where the information is used to indicate the target network device. Retransmit the data block.
  • the hybrid automatic repeat request HARQ feedback message including the information is agreed by the terminal and the network device, and the target network device receives the terminal sent by using the HARQ feedback message.
  • the information is agreed by the terminal and the network device, and the target network device receives the terminal sent by using the HARQ feedback message.
  • the information is located in a bitmap bitmap.
  • the network device receives the HARQ feedback of the CBG level of the terminal.
  • a bit is added to the bit bitmap, and the target network device decides to retransmit the data block according to the newly added bit in the bitmap.
  • the target network device retransmits the data block according to an indication by the terminal on a resource allocated by the network device to the terminal.
  • the communication device provided by the embodiment of the present application may be a terminal or a chip in the terminal.
  • the communication device has the functionality to implement the first aspect and the technical solutions of each of the possible aspects of the first aspect. This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the communication device comprises a processing unit and a transceiver unit, wherein the processing unit is configured to control the transceiver unit to implement the functions of the first aspect and the technical solutions of each of the possible aspects of the first aspect.
  • the communication device comprises a processor and a memory, wherein the memory is for storing a program, and the processor is for calling a program stored in the memory to implement the first aspect and any one of the possible designs of the first aspect A method of determining time domain resources.
  • the processor can transmit or receive data through an input/output interface, a pin or a circuit.
  • the memory can be a register, a cache, etc. within the chip.
  • the memory may also be a memory unit located outside the chip in the terminal device, such as a read-only memory (ROM), other types of static storage devices that can store static information and instructions, and random access memory (random Access memory, RAM), etc.
  • ROM read-only memory
  • RAM random access memory
  • the processor mentioned in any of the above may be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more An integrated circuit for controlling a program for performing the method of data reception of any of the above-described first aspect or any of the first aspects.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication device provided by the embodiment of the present application may be a network device or a chip in the network device.
  • the communication device has the function of realizing the technical solutions of the above-mentioned second aspect and the respective possible designs of the second aspect. This function can be implemented in hardware or in hardware by executing the corresponding software.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the communication device comprises a processing unit and a transceiver unit, and the processing unit is configured to control the transceiver unit to implement the functions of the second aspect and the technical solutions of each of the possible aspects of the second aspect.
  • the communication device includes a processor and a memory, wherein the memory is for storing a program, and the processor is configured to call a program stored in the memory to implement the second aspect and any one of the possible designs of the second aspect.
  • a method of indicating a time domain resource can transmit or receive data through an input/output interface, a pin or a circuit.
  • the memory can be a register, a cache, etc. within the chip.
  • the memory can also be a memory unit external to the chip within the network device, such as a ROM, other types of static storage devices that can store static information and instructions, RAM, and the like.
  • the processor mentioned in any of the above may be a general-purpose CPU, a microprocessor, a specific ASIC, or one or more data for controlling the execution of any of the above second aspect or the second aspect.
  • the integrated circuit of the program of the method of transmission may be a general-purpose CPU, a microprocessor, a specific ASIC, or one or more data for controlling the execution of any of the above second aspect or the second aspect.
  • the embodiment of the present application further provides a computer readable storage medium storing a program, when the program is run on a computer, causing the computer to execute the method described in the above aspects.
  • the present application also provides a computer program product comprising a program, which when executed on a computer, causes the computer to perform the method described in the above aspects.
  • the embodiment of the present application further provides a communication system, including the communication device of any one of the third aspect or the third aspect, or the communication device of any one of the fourth aspect or the fourth aspect. .
  • FIG. 1 is a schematic diagram of a communication architecture provided by an embodiment of the present application.
  • FIG. 2 is a flowchart of an interaction method for data transmission and reception provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be used in the communication architecture shown in FIG. 1.
  • the communication architecture includes two network devices, namely, network device A and network device B, and a terminal.
  • the terminal can simultaneously receive data sent by multiple network devices through a Physical Downlink Shared Channel (PDSCH), and the terminal has SIC receiving capability.
  • the SIC receiving capability of the terminal means that the terminal can gradually subtract the interference of the signal with the highest power among the received signals composed of multiple signals, and perform data decision on the multiple signals in the received signal. If the terminal decides a signal, it subtracts the interference caused by the signal to the received signal.
  • PDSCH Physical Downlink Shared Channel
  • the terminal performs the above operations in the order of the power levels of the multiple signals, that is, first performs data decision on the signal with higher power until all interference is eliminated.
  • the data sent by the at least two network devices through the PDSCH may be coherent or non-coherently combined.
  • the communication architecture shown in FIG. 1 can be specifically applied to various communication systems, such as: global system of mobile communication (GSM), code division multiple access (CDMA), broadband. Wideband code division multiple access (WCDMA), time division-synchronous code division multiple access (TD-SCDMA), universal mobile telecommunication system (UMTS), LTE system Etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband code division multiple access
  • TD-SCDMA time division-synchronous code division multiple access
  • UMTS universal mobile telecommunication system
  • LTE system Etc LTE system Etc.
  • 5G fifth generation mobile communication technology
  • NR new radio
  • D2D device to device
  • M2M machine to machine
  • the network device in this application may be a transmission reception point (TRP) or a base station.
  • a base station refers to a device in an access network that communicates with user equipment over one or more sectors over an air interface, which coordinates the management of attributes of the air interface.
  • the base station may be a base station such as GSM or CDMA, such as a base transceiver station (BTS), or a base station in WCDMA, such as a Node B, or an evolution in an LTE system.
  • a type of base station such as an evolved Node B (eNode B), may also be a base station in a 5G system, such as a gNode B, or a base station in a future network.
  • a terminal may include or be referred to as a user equipment (UE), a terminal equipment, a mobile station (MS), a mobile terminal, a subscriber unit (SU). ), subscriber station (SS), mobile station (MB), remote station (RS), access point (AP), remote terminal (RT), access An access terminal (AT), a user terminal (UT), a user agent (UA), or a user device (UD), etc., are not limited in this application.
  • the terminal device may refer to a wireless terminal or a wired terminal.
  • the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem, which may be via a radio access network (RAN) ) Communicate with one or more core networks.
  • RAN radio access network
  • the terminal device may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, and may also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, such as Personal communication service (PCS) telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA) Etc., they exchange language and/or data with the wireless access network.
  • PCS Personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the network device A and the network device B jointly serve one terminal, and they independently schedule the terminal and transmit downlink data to the terminal.
  • Each network device can send one or more data blocks to the terminal.
  • the terminal can distinguish between the network device A and the network device B by using a cell identity (ID) or a quasi-co-located (QCL).
  • ID cell identity
  • QCL quasi-co-located
  • the data block referred to in this application includes a transport block (TB), or the data block can be understood as TB.
  • the codeword (CW) can be understood as a cyclic redundancy check (CRC) insertion, division into a code block (CB) for TB, and re-insertion of a CRC for each CB after segmentation. , channel coding, data stream obtained after rate matching.
  • a CW corresponds to a TB.
  • the TB-divided multiple CBs may be grouped to form at least one CBG, and each code block group includes at least one CB.
  • the network device sends a data block to the terminal, and the terminal device fails to receive the data block due to various reasons, for example, the interference of the other device is too large, or fails to correctly demodulate the data block, and obtains the data block.
  • the data block may be referred to as a data block that receives an error, and may also be referred to as a data block that fails to receive.
  • the terminal receives an error for the data block.
  • the terminal needs the network device to feed back a NACK to request the network device to retransmit the data block.
  • the network device corresponding to the data block involved in the present application is a network device that points to the terminal to send the data block.
  • Retransmission means that the sender sends the data to the receiver again after a certain time after sending the data to the receiver.
  • the specific method of retransmission can refer to the methods of additional combining (chase combining, CC) and incremental redundancy (IR).
  • CC additional combining
  • IR incremental redundancy
  • the retransmitted bit information is the same as the bit information at the time of initial transmission, and the bit information retransmitted in the IR does not need to be the same as the initial transmission, but a set of multiple coded bits is generated, each The set of coded bits all carry the same information.
  • the sender needs to retransmit, it usually sends a different set of coded bits than the previous one.
  • the receiver will combine the retransmitted data with the previously sent data.
  • HARQ is a technology that combines forward error correction (FEC) and automatic repeat request (ARQ) methods.
  • FEC reduces the number of retransmissions by adding redundant information so that the receiver can correct some of the errors.
  • the receiving end requests the sender to resend the data through the ARQ mechanism.
  • the receiving end uses an error detection code, such as a CRC, to detect if the received data packet is in error. If there is no error, the receiver will send an ACK, and after receiving the ACK, the sender will send the next packet. If an error occurs, the receiving end sends a NACK to the transmitting end, and after receiving the NACK, the transmitting end retransmits the data packet.
  • the terminal needs to feed back a NACK to each of the network devices that respectively receive the error to request the corresponding network device to perform retransmission.
  • the terminal may increase the ability to correctly decode the remaining data block after successfully solving one of the data blocks. At this time, the terminal may not require data for all receiving errors. The blocks are retransmitted.
  • the terminal may perform measurement of a channel state with the network device according to the reference signal sent by the network device, and feed back related channel state information (CSI) to the network device.
  • the network device performs downlink resource allocation on the terminal according to the CSI fed back by the terminal, and implements data transmission on the downlink channel and the terminal.
  • the embodiment of the present application provides a data block retransmission scheme. When a terminal receives multiple data blocks at the same time, if there are two or more data block receiving errors, the terminal may correspond to the data block corresponding to the sending and receiving error.
  • the channel state measurement result of the network device selects one of the data blocks that received the error for retransmission, and the other data blocks that receive the error are not retransmitted.
  • the terminal may determine the network device corresponding to the best channel state measurement result in the network device corresponding to the data block that sends the receiving error, and then select the network device to retransmit the data block sent by the network device.
  • the terminal may determine the network device corresponding to the best channel state measurement result in the network device corresponding to the data block that sends the receiving error, and then select the network device to retransmit the data block sent by the network device.
  • one data block is selected for retransmission, which reduces the number of data block transmissions and saves downlink transmission resources.
  • an embodiment of the present application provides an interaction method for data transmission and reception.
  • the following describes the scenario corresponding to the communication architecture shown in FIG. 1 as an example. It should be noted that more than two network devices can also be included in the architecture.
  • the embodiment of the present application may also be applied to a scenario in which a network device sends multiple data blocks. In this case, the terminal may select one of the multiple data blocks sent by the one network device as the data block that needs to be retransmitted. Regardless of the above scenario, those skilled in the art can understand how to implement the technical solutions described in the embodiments of the present application, and the details are not described herein again.
  • the terminal receives M data blocks sent by the network device, where N data blocks receive errors, where M and N are integers, and M ⁇ N ⁇ 2.
  • network device A and network device B perform independent scheduling of the terminal. That is, the network device described in step 202 includes network device A and network device B. At a certain moment, or for a certain period of time, the terminal receives the data block 0 and the data block 1 respectively sent by the network device A and the network device B. That is, the value of M at this time is 2.
  • the terminal performs demodulation and the like on the data block 0 and the data block 1, respectively, to acquire the contents in the data block 0 and the data block 1.
  • demodulation and the like on the data block 0 and the data block 1, respectively, to acquire the contents in the data block 0 and the data block 1.
  • both data block 0 and data block 1 are correctly processed, that is, the terminal successfully acquires the contents of data block 0 and data block 1.
  • the terminal may feed back the ACK to the network device A and the network device B according to the prior art, and perform subsequent processes;
  • the terminal successfully acquires the content in data block 0, and data block 1 is not processed correctly, and the terminal does not acquire the content in data block 1.
  • the terminal can still feed back the ACK to the network device A according to the prior art, feed back the NACK to the network device B, and retransmit the data block 1 by the network device B, and perform subsequent processes;
  • the terminal can buffer the received signal, and the received signal is the sum of the data block and the noise sent by the different network devices after the channel reaches the receiving end.
  • the terminal indicates to the target network device corresponding to one of the N data blocks, and retransmits the one data block.
  • the N data blocks include data block 0 and data block 1
  • the network device corresponding to data block 0 is network device A
  • the network device corresponding to data block 1 is network device B.
  • the terminal selects a data block that receives the error as a data block that needs to be retransmitted in the next data transmission period, that is, selects one of the data block 0 and the data block 1 as the data block that needs to be retransmitted in the next data transmission period.
  • the terminal performs channel quality measurement on the channel corresponding to the network device A and the network device B according to the reference signal sent by the network device A and the network device B, and selects a relatively high CQI according to the measurement result.
  • a channel or a channel having a relatively high SINR the corresponding data block is used as a data block that needs to be retransmitted in the next data transmission period. For example, if the data block corresponding to the channel having the higher CQI value is data block 0, the terminal selects the data block 0 as the data block that needs to be retransmitted in the next data transmission period.
  • the terminal instructs the network device A corresponding to the data block 0 to retransmit the data block 0.
  • the target network device corresponding to one of the N data blocks is the network device A in this embodiment.
  • the terminal feeds back the NACK to the network device A and the NACK to the network device B.
  • the target network device retransmits the one data block according to the indication of the terminal.
  • the target network device is the network device A in the embodiment of the present application.
  • the network device A when the network device A receives the NACK sent by the terminal, it does not represent that it needs to transmit data to the terminal next time, that is, the next data transmission period is retransmitted.
  • Data block 0 when the network device A needs to receive the indication from the terminal, it can confirm that it will retransmit the data block 0 when the next time the data is transmitted to the terminal, that is, the next data transmission period.
  • the network device A when the network device A receives the indication that the terminal retransmits the data block 0, the network device A needs to retransmit the data block 0 when the data is transmitted to the terminal next time, that is, the next data transmission period.
  • the network device A For the manner in which the network device A retransmits the data block, refer to the prior art, and details are not described herein again.
  • the network device B even if the network device B receives the NACK sent by the terminal, the network device B does not retransmit the data block 1 in the period of transmitting data to the terminal for the next time because the terminal does not receive the indication.
  • the network device B caches the data block 1 in the buffer area, and when a new data block, such as the data block 3, needs to be sent to the terminal, the next time the data is transmitted to the terminal, that is, the next data transmission
  • the data block 3 is periodically transmitted to the terminal. For the data block 1, if the ACK of the terminal for the data block 1 is subsequently received, the data block 1 buffered in the buffer is cleared, and if the terminal receives the NACK for the data block 1 again, the data block 1 can be retransmitted.
  • the terminal after receiving the data block 0 retransmitted by the network device A, the terminal performs demodulation and the like on the retransmitted data block to obtain the content of the retransmitted data block 0.
  • the terminal may perform HARQ soft combining with the previously received data block 0, that is, the data block 0 received in step 202, that is, the previously buffered signal (retransmitted data block 0 and previously buffered data block 0)
  • the merge can be performed corresponding to different redundancy versions, trying to obtain the contents of data block 0. It should be noted that the use of HARQ soft combining will increase the probability that the terminal successfully receives data block 0.
  • the terminal can further demodulate the data block 1 received in step 202 by using the SIC capability it has, in an attempt to acquire the content in the data block 1. If the terminal acquires the content of the data block 1, based on this, the terminal feeds back an ACK to each of the network device A and the network device B for the data block 0 and the data block 1, respectively. If the terminal still fails to acquire the content of the data block 1, the terminal feeds back an ACK to the network device A for the data block 0, and feeds back the NACK to the network device B for the data block 1. At this time, as described above, the network device B can select to retransmit the data block 1.
  • the terminal feeds back NACK to the network device A and the network device B for the data block 0 and the data block 1, respectively, without any additional indication, then the network device A and the network And device B retransmits data block 0 and data block 1, respectively, according to the prior art scheme.
  • the terminal if the terminal receives an erroneous data block of two or more, the terminal selects one of the data blocks of the erroneous data block to perform retransmission. After demodulating the retransmitted data block, the terminal uses the SIC performance recovery terminal to receive an erroneous but no retransmitted data block, thereby reducing the number of retransmissions of the data block during the process of receiving the data block by the terminal, thereby saving downlink transmission resources. .
  • the terminal when the value of N is greater than or equal to 3, the terminal may also indicate that more than one data block is retransmitted, for example, in step 202, at a certain moment, or a certain period of time.
  • the terminal receives the data block 01 and the data block 02 sent by the network device A, and the terminal receives the data block 10 sent by the network device B, that is, the value of M is 3, and the data block 01, the data block 02, and the data block 10 are received.
  • the terminal may separately indicate each data block information that needs to be retransmitted.
  • the terminal may send indication information, where the value of the indication information may correspond to retransmission of at least one data block.
  • the first value of the indication information corresponds to M1 data blocks for retransmission
  • the relationship between the value of the indication information and which data blocks are expected to be retransmitted by the terminal device may be obtained by the terminal by means of predefined, base station configuration, and the like.
  • the terminal may instruct the network device A corresponding to the data block 01 and the data block 02 to retransmit the data block 01 and the data block 02.
  • the terminal may instruct the network device A corresponding to the data block 01 and the data block 02 to retransmit the data block 01 and the data block 02.
  • the terminal sends information to the target network device, where the information is used to instruct the target network device to retransmit the one data block.
  • the terminal sends information to the network device A, which is used to instruct the network device A to retransmit the data block 0.
  • the terminal may transmit the indication information to the network device A by using a field carried in the message.
  • the message can be an existing message or a newly defined message.
  • the value of the field in the indication message may be used to indicate whether the data block expected by the terminal is to be retransmitted.
  • the change of the value of the field may be used to indicate whether the data block expected by the terminal is to be retransmitted.
  • the change refers to a change in the value of the indication information of different time units.
  • the terminal can send the message to both network devices A and B, the message containing a field. Assuming that the field is 1 bit, when the bit is "1", the corresponding terminal sends the indication information to the network device. That is, in this embodiment, the value of the bit in the message received by the network device A should be "1", indicating that the network device A retransmits the data block 0, and the network device B receives the same.
  • the corresponding terminal when the bit is "0", the corresponding terminal sends the indication information to the network device, which is not limited in this application.
  • the message is sent to the network devices A and B with respect to the last terminal.
  • the corresponding terminal sends the indication information to the network device. That is, in this embodiment, the value of the bit in the message received by the network device A does not reverse, and is used to instruct the network device A to retransmit the data block 0, but the network device B also receives the message, but Since the bit of the message has been inverted, the indication information is not considered to have been received.
  • the flipping means that the value of the bit changes from “1” to “0” or from “0” to “1” with respect to the message received last time. It should be noted that, in the specific implementation, when the bit is inverted, the corresponding terminal sends the indication information to the network device, which is not limited in this application.
  • bit of the field may be not only 1 bit, but also 2 bits, may be 4 bits, etc., which are not enumerated here.
  • the TB-divided multiple CBs may be grouped to form at least one code block group CBG, and each code block group includes at least one CB. Therefore, the CBG-level retransmission can be supported in the NR system, that is, when a data block receives an error, only one or more CBGs that receive the error in the data block are retransmitted instead of retransmitting the entire data block. That is to say, the data block that needs to be retransmitted is actually that at least one CBG in the data block needs to be retransmitted, and the at least one CBG is the CBG that the terminal receives the error. If the data block does not need to be retransmitted, then all the data blocks in the data block do not need to be retransmitted.
  • the value of the field in the indication message may be used to indicate whether the data block expected by the terminal is to be retransmitted.
  • the change of the value of the field may be used to indicate whether the data block expected by the terminal is to be retransmitted.
  • the change refers to a change in the value of the indication information of different time units.
  • the terminal performs CBG-level HARQ feedback on the data block transmitted by the network device (ie, indicates that each CBG receives success or error respectively), and adds a bit in the bit bitmap used when feeding back ACK or NACK.
  • the next time the network device is instructed to transmit data to the terminal that is, whether the data block is retransmitted in the next data transmission period. For example, if the value of the bit is "1", it means that the data block needs to be retransmitted; if the value of the bit is 0, it means that the data block does not need to be retransmitted. vice versa.
  • the network device A receives the NACK fed back by the terminal, and the corresponding used bitmap includes a newly added bit, and its value is “1”, and the corresponding terminal sends the network device A.
  • the network device B receives the NACK fed back by the terminal, and the corresponding used bitmap includes a newly added bit, and its value is “0”. Therefore, the terminal is not considered to send the information indicating the retransmission to the network device B, then The network device B does not need to retransmit the data block 1 when transmitting data to the terminal next time, that is, the next data transmission period.
  • the newly added bit position of the bitmap of the CBG feedback corresponding to the selected data block 0 is 1, and the information of whether each CBG of the data block 0 needs to be retransmitted is filled in the data block 0.
  • the bitmap of the corresponding CBG feedback the bit position of the corresponding BBG feedback bit of the data block 1 is 0, and the information of whether each CBG of the data block 1 needs to be retransmitted is filled in the bitmap of the CBG feedback corresponding to the data block 0. .
  • the network device A or the network device B when receiving the multi-bit feedback of the CBG, check the newly added bits of the bitmap used by the network device A. For the network device A, the value of the newly added bit is "1", and then The CBG that needs to be retransmitted in the data block 0 is transmitted; for the network device B, if the value of the newly added bit is "0", the CBG that needs to be retransmitted in the data block 1 can be transmitted, and the new data block 3 can be transmitted.
  • the buffers corresponding to the CBGs are emptied, and if the ACK of the CBG is received, the network device B receives more of the CBGs. If the value of the bit new bit used for bit feedback is changed to "1", the CBG that needs to be retransmitted in the data block 1 is retransmitted.
  • the embodiment of the present application implements retransmission of the CBG level in the NR system.
  • the gNode B retransmits all CBGs that need to be retransmitted in the selected retransmitted data block according to the new information in the bitmap.
  • the network device obtains the CBG that failed to receive the data block according to the bitmap, and retransmits the CBGs. If the terminal indicates that the data block is not retransmitted, the network device does not retransmit all CBGs in the CW. Therefore, in the NR network system, the terminal instructs the network device to retransmit the CBG that the terminal receives the error, which can prevent the network device from receiving unnecessary data retransmission of the correct CBG, and save the downlink transmission resource.
  • CBG-level indication manner may be superimposed and applied to any terminal indication manner in this application.
  • the terminal may further help the terminal to indicate the data block that needs to be retransmitted by predefining the new meaning of the HARQ message with the network device.
  • the network device may be a primary network device that provides services for the terminal, or may be the target network device.
  • the target network device may be the primary network device.
  • the primary network device in the embodiment of the present application refers to a network device that establishes an initial connection with the terminal, or a network device that performs RRC connection reestablishment in the time domain terminal, or a network device specified in the handover process.
  • the current message about HARQ corresponding to two kinds of feedback ACK (that is, a state indicating that the data block transmission is successful) and NACK (that is, a state indicating that the data block transmission fails), and the value of the bit corresponding to the HARQ feedback message may be respectively Corresponds to "1" and "0".
  • ACK that is, a state indicating that the data block transmission is successful
  • NACK that is, a state indicating that the data block transmission fails
  • the value of the bit corresponding to the HARQ feedback message may be respectively Corresponds to "1" and "0".
  • a null response may be added, and the transmit power of the bit corresponding to the HARQ feedback message is 0.
  • the terminal can communicate with the network device in a pre-agreed manner, for example, pre-defining the above three kinds of feedback messages, wherein the NACK is used to indicate that the terminal receives an error in the data block corresponding thereto and simultaneously instructs the network device to retransmit the data block, that is, the terminal can be considered as
  • the NACK includes information for instructing the network device to retransmit the data block corresponding to the NACK.
  • the null response is used to indicate that the network device and its corresponding data block terminal receive an error.
  • the next time the data is transmitted to the terminal that is, the next data transmission period, the network device does not need to retransmit the data block corresponding to the null response.
  • the ACK is consistent with the meaning indicated in the prior art, and is used to indicate that the network device and its corresponding data block terminal receive successfully.
  • the NACK sent by the terminal received by the network device A is used to indicate that the terminal receives an error in the data block 0, and instructs the network device A to retransmit the data block 0.
  • the network device B detects an empty response, that is, although the terminal device receives an error for the data block 1 this time, it is not necessary to retransmit the data block 1 temporarily.
  • the null response is used to instruct the network device to retransmit the information of the data block corresponding to the NACK, so that the NACK is used to indicate that the network device and its corresponding data block terminal receive Wrong, the next time the data is transmitted to the terminal, that is, the next data transmission period, the network device does not need to retransmit the data block corresponding to the null response.
  • the ACK is consistent with the meaning indicated in the prior art, and is used to indicate that the network device and its corresponding data block terminal receive successfully. As long as the agreement between the terminal and the network device is consistent, the embodiment of the present application does not limit this.
  • two bits may be used to correspond to the above three types of HARQ feedback messages, for example, 00 indicates an empty response, 01 indicates an ACK, and 10 indicates a NACK.
  • 00 indicates an empty response
  • 01 indicates an ACK
  • 10 indicates a NACK.
  • the embodiments of the present application do not exclude other representations.
  • the embodiment of the present application can implement the terminal to instruct the data block to retransmit without adding additional fields or uplink transmission resources.
  • the terminal instructs the target network device to retransmit the one data block by using the resource allocated by the network device.
  • the network device can allocate a dedicated resource to the terminal, and the terminal can use the dedicated resource to indicate whether the network device needs to retransmit the specific data block sent by the network device.
  • the network device may be a primary network device that provides services for the terminal, that is, a unified allocation by the primary network device, or may be the target network device. The following uses the network device as the target network device for illustration. In the embodiment of FIG.
  • the network device A allocates the dedicated resource 1 to the terminal, and the terminal may feed back the NACK to the network device A for the data block 0, and indicate the network in the form of not transmitting any signal on the resource 1 within the agreed time 1.
  • Device A retransmits data block 0.
  • the network device B allocates the dedicated resource 2 to the terminal, and the terminal can feed back the NACK to the network device B for the data block 1, and send the signal on the resource 2 within the agreed time 2. At this time, the network device B can be considered to transmit the data to the terminal next time. At the same time, that is, the next data transmission period does not temporarily retransmit the data block 1.
  • the terminal may also indicate the retransmission of the data block 0 by sending a signal on the resource 1 within one period of the agreed time. At this time, the corresponding terminal does not send any signal on the resource 2 in the agreed time period.
  • the terminal instructs the network device to select one data block from the data block that receives the error for retransmission.
  • the terminal sends a signal through the resource allocated by the network device.
  • the terminal does not send a signal, and the network device transmits the data that needs to be retransmitted through the presence or absence of the signal on the time-frequency resource. Block retransmission can save signaling overhead.
  • the semi-static configuration of the RRC layer may also be performed according to the channel quality information of the data block, for example, Serve the semi-static configuration with the primary network device of the terminal. The network device then determines whether to retransmit the data block according to the semi-static configuration information.
  • the network device A and the network device B are present in the multi-stream NC-JT scenario of the non-ideal backhaul. If the network device A is a network device that is initially connected to the terminal, or is RRC connected and reestablished with the terminal. The network device, or the network device specified during the handover process, considers the network device A primary network device and the network device B as the secondary network device.
  • the terminal may perform channel quality measurement on the transport channels corresponding to the network device A and the network device B, respectively, and obtain CSI1 and CSI2 corresponding to the transport channels respectively corresponding to the network device A and the network device B, and feed back to the network device A, and the network device A performs an RRC semi-static configuration according to CSI1 and CSI2 fed back by the terminal.
  • the configuration indicates how the next data transmission period should be performed when the terminal receives the data block 0 transmitted by the network device A and the data block 1 transmitted by the network device B. Perform data block retransmission.
  • the primary network device (network device A) retransmits the data block 0 it sent.
  • the secondary network device (network device B) does not retransmit the data block 1 it sends, and can cache the data block 1; or,
  • the secondary network device (network device B) retransmits the data block 1 it transmitted.
  • the primary network device does not retransmit the data block 0 it sends, and the amount can buffer the signal data block 0; or,
  • the primary network device (network device A) retransmits the data block 0 it transmitted, and the secondary network device (network device B) retransmits the data block 1 it transmitted.
  • the CSI when the CSI includes the CQI, it can be considered that the channel quality between the network device corresponding to the higher CQI index and the terminal is better, and the network device is selected for retransmission, corresponding to 1) (at this time, the network device A and the terminal The quality of the channel is better) or 2) (the channel quality between the network device B and the terminal is better); if the CQI index of the two network devices is very low, then (3), that is, the implementation of the present application is not adopted.
  • the data block that the terminal receives the error decoding is retransmitted.
  • FIG. 3 a schematic diagram of a communication device provided by the present application, which may be a terminal or a chip or a system on a chip in the terminal, may execute the foregoing terminal device in various embodiments of the present application. The method of execution.
  • the communication device 300 includes at least one processor 310 and a memory 330.
  • the memory 330 is used to store programs, and may be a ROM or other types of static storage devices such as RAM or other types of dynamic storage devices that can store static information and instructions, or may be electrically erasable or programmable. Electrostatic erasable programmabler-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc., disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store a desired program in the form of an instruction or data structure and that can be accessed by a computer, but is not limited thereto.
  • the memory 330 can exist independently and be coupled to the processor 310. Memory 330 can also be integrated with processor 310.
  • the processor 310 is configured to execute the program in the memory 330 to implement the steps performed by the terminal device in the method for determining the time domain resource in the embodiment of the present application.
  • processor 310 can be a general purpose CPU, a microprocessor, a particular ASIC, or one or more integrated circuits for controlling the execution of the program of the present application.
  • processor 310 may include one or more CPUs, such as CPU0 and CPU1 in FIG.
  • the communication device 300 can include multiple processors, such as the processor 310 and the processor 311 in FIG.
  • processors may be a single-CPU processor or a multi-core processor, where the processor may refer to one or more devices, circuits, and/or A processing core for processing data, such as computer program instructions.
  • the transceiver 320 shown in FIG. 3 may be further included for communicating with other devices or communication networks, and the transceiver 320 includes a radio frequency circuit.
  • the processor 310, the transceiver 320, and the memory 330 can be connected through a communication bus in the terminal device.
  • the communication bus can include a path for communicating information between the above units.
  • the processor 310 can transmit or receive data through an input/output interface, a pin or a circuit or the like.
  • FIG. 4 another schematic diagram of a communication device in the embodiment of the present application may be a terminal or a chip or a system on a chip in a terminal, and may perform the method performed by the terminal device in the foregoing embodiments of the present application.
  • the device includes a processing unit 401 and a transceiver unit 402.
  • the processing unit 401 is configured to control the transceiver unit 402 to implement the method performed by the terminal device in the embodiment shown in the figure.
  • FIG. 5 a schematic diagram of a communication device provided by the present application, which may be, for example, a target network device, a network device, a chip in a target network device, or a system on a chip or a chip in a network device. Or a system on a chip, a method performed by a target network device or a network device in various embodiments of the present application.
  • the communication device 500 includes at least one processor 510 and a memory 530.
  • the memory 530 is used to store programs, and may be a ROM or other types of static storage devices such as RAM or other types of dynamic storage devices that can store static information and instructions, or may be EEPROM or CD-ROM. Or other disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), disk storage media or other magnetic storage devices, or can be used to carry or store expectations in the form of instructions or data structures And any other medium that can be accessed by a computer, but is not limited thereto.
  • Memory 530 can exist independently and be coupled to processor 510. Memory 530 can also be integrated with processor 510.
  • the processor 510 is configured to execute the program in the memory 530 to implement the steps performed by the network device in the method for indicating the time domain resource in the embodiment of the present application.
  • processor 510 can be a general purpose CPU, a microprocessor, a particular ASIC, or one or more integrated circuits for controlling the execution of the program of the present application.
  • processor 510 may include one or more CPUs, such as CPU0 and CPU1 in FIG.
  • communication device 500 can include multiple processors, such as processor 510 and processor 511 in FIG. Each of these processors may be a single-CPU processor or a multi-core processor, where the processor may refer to one or more devices, circuits, and/or A processing core for processing data, such as computer program instructions.
  • processors such as processor 510 and processor 511 in FIG.
  • processors may be a single-CPU processor or a multi-core processor, where the processor may refer to one or more devices, circuits, and/or A processing core for processing data, such as computer program instructions.
  • the network device may further include a transceiver 520 as shown in FIG. 5 for communicating with other devices or communication networks, and the transceiver 520 includes a radio frequency circuit.
  • the processor 510, the transceiver 520, and the memory 530 can be connected through a communication bus in the network device.
  • the communication bus can include a path for communicating information between the above units.
  • the processor 510 can transmit or receive data through an input/output interface, a pin or a circuit or the like.
  • FIG. 6 is a schematic diagram of another communication device according to an embodiment of the present application.
  • the communication device may be, for example, a target network device, a network device, a chip in a target network device, or a chip or system on a chip in a network device.
  • a method performed by a target network device or a network device in various embodiments of the present application may be performed.
  • the communication device includes a processing unit 601 and a transceiver unit 602.
  • the processing unit 601 is configured to control the transceiver unit 602 to implement the method performed by the target network device or the network device in the embodiment of the present application.
  • the manner in which the communication device shown in FIG. 4 and FIG. 6 is divided into modules is schematic, and only one logical function is divided, and the actual implementation may have another division manner.
  • the transceiver unit is divided into a receiving unit, a transmitting unit, and the like.
  • the embodiment of the present application further provides a communication system including a communication device 300 and a communication device 500.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium such as a Solid State Disk (SSD)
  • embodiments of the present application can be provided as a method, apparatus (device), computer readable storage medium, or computer program product.
  • the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects, which are collectively referred to herein as "module” or "system.”
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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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

Selon des modes de réalisation, la présente invention concerne un procédé de réception de données dans un réseau de communication. Le procédé comprend les étapes suivantes : un terminal reçoit M blocs de données émis par un appareil de réseau, un nombre N des M blocs de données étant incorrectement reçus, M et N étant des entiers, et M ≥ N ≥ 2 ; et le terminal ordonne à un dispositif de réseau cible, correspondant à l'un des blocs de données parmi le nombre N de blocs de données, de réémettre ledit bloc de données. Le dispositif terminal ordonne à un dispositif de réseau, correspondant à un bloc de données incorrectement reçu parmi de multiples blocs de données, de réémettre le bloc de données incorrectement reçu, ce qui permet d'éviter la réémission de la totalité du nombre N de blocs de données, de réduire le nombre de blocs de données réémis et de conserver les ressources de transmission en liaison descendante.
PCT/CN2018/120470 2017-12-13 2018-12-12 Procédé et dispositif de réception et d'émission de données, et système de communication WO2019114730A1 (fr)

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