WO2018028682A1 - Procédé et appareil de transmission de données, et système associé - Google Patents

Procédé et appareil de transmission de données, et système associé Download PDF

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Publication number
WO2018028682A1
WO2018028682A1 PCT/CN2017/097126 CN2017097126W WO2018028682A1 WO 2018028682 A1 WO2018028682 A1 WO 2018028682A1 CN 2017097126 W CN2017097126 W CN 2017097126W WO 2018028682 A1 WO2018028682 A1 WO 2018028682A1
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WIPO (PCT)
Prior art keywords
data
information
receiving device
indication information
blocks
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PCT/CN2017/097126
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English (en)
Chinese (zh)
Inventor
张屹
张鹏
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华为技术有限公司
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Publication of WO2018028682A1 publication Critical patent/WO2018028682A1/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
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • 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
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a data transmission method, apparatus, and system in a wireless communication system.
  • Channel coding is the most common technical means to improve transmission reliability.
  • data that needs to be transmitted once is generally divided into one or more coding blocks, channel coding is performed on different coding blocks, and one or more channel coded coding blocks are cascaded and then transmitted.
  • Some transmission data transmission errors may be concentrated in one or several coding blocks, resulting in failure of one or several coding blocks for transmission errors.
  • the data transmitting device can retransmit all the data so that the data receiving device correctly receives all the data, but it is obviously wasted transmission resources because one or several error encoding blocks retransmit all the data. Therefore, the data transmitting device can generate the verification information with the error correction function based on the data to be transmitted, and send the verification information together with the data to be transmitted to the data receiving device, and if there is a coding block that fails to be decoded, the data transmission device can pass The check information and other coded blocks that are decoded correctly correct the coded block that failed decoding. For example, a new coding block can be obtained by SPC (single parity code) coding according to the coding blocks c 0 , c 1 , . .
  • c K-1 in the data to be transmitted.
  • c 0 , c 1 , ..., c K-1 denotes a bit or symbol sequence of the coding block 0-K-1
  • cK is a bit or symbol sequence generated by SPC coding
  • K is an integer greater than or equal to 2
  • Transmitting the above K+1 coding blocks in one transmission interval so that when any one of 0-K-1 coding blocks is wrong, it can be corrected by SPC decoding and redundant information of the K+1th coding block. Wrong, avoiding a coding block error causes the base station to retransmit all the data in this transmission interval. However, when all the data to be transmitted is correctly decoded, the transmission of the above verification information causes a waste of transmission resources.
  • This paper describes a data transmission method, device and system, which aims to realize the error correction of service data by verifying the separate transmission of data and service data, and can reduce the waste of resources caused by simultaneous transmission of verification information and service data. .
  • the embodiment of the present application provides a downlink data transmission method, including: the data sending device sends the second data to the data receiving device; wherein the second data is generated according to the first data that is previously transmitted.
  • the second data may be various forms of check information (or check data), such as an outer code, an erasure code, or an outer erasure code. Etc., this application does not limit this.
  • the second data is used for error correction of the first data.
  • the first data transmitted in advance refers to service data transmitted before the second data is transmitted or other data that needs to be transmitted.
  • the second data generated according to the first data may implement error correction when the first data transmission error is performed, and the second data is separately transmitted from the first data, so that the second data and the first data are simultaneously transmitted but the first data does not occur.
  • data transmission The device sends the data to be transmitted (ie, the first data) at the time of initial transmission, and transmits the second data during the retransmission.
  • the second data is generated by encoding the first data.
  • the data transmitting device receives the first indication information, where the first indication information is used to indicate a decoding status of the first data and/or to indicate the sending of the second data; the data sending device sends the second The data is sent to the data receiving device, wherein the second data is generated by encoding the first data transmitted previously.
  • the indicating the decoding status of the first data may be that the first indication information includes decoding status information of the first data, and the decoding status information refers to information related to the first data decoding result. For example, the first data is failed to be decoded by one cell, or the number of coding blocks indicating the decoding error in the first data is more detailed, which is not limited by the present application; the indication indicates the sending of the second data.
  • the first indication information may include information related to sending the second data, for example, by using a cell to indicate whether the second data needs to be sent, or more specifically indicating the number of coding blocks of the second data, etc. Not limited.
  • the data transmitting device transmits the second data to the data receiving device when the first data is decoded incorrectly; wherein the second data is generated by encoding the first data transmitted previously.
  • the data sending device sends second indication information to the data receiving device, where the second indication information is used to indicate that the second data is jointly decoded with the first data.
  • the second indication information may be sent by using control information.
  • the data sending device sends control information to the data receiving device, where the control information includes merged decoding information (a possible design manner of the second indication information), where the combined decoding information is used. Instructing the second data to be jointly decoded with the first data.
  • the joint decoding includes performing error correction on the first data in combination with the second data.
  • the second indication information may be sent to the data receiving device in other manners, for example, sent with the second data, or sent together with other messages, etc., which is not limited in this application.
  • control information further includes at least one of new data indication information and redundancy version information.
  • the new data indication information is used to indicate whether the second data and/or the first data is an initial transmission;
  • the redundancy version information is used to indicate a redundancy version used for transmission data encoding.
  • the data transmitting device receives information of the number J of coding error coding blocks of the first data, where J is an integer greater than or equal to 1.
  • the first indication information includes information about the J.
  • the data transmitting device may determine the generation and/or transmission scale of the second data according to the information of the number of decoding error coded blocks J of the first data sent by the data receiving device, for example, determining the encoding of the second data according to the J.
  • the number of blocks T wherein the determined number of second data encoding blocks T can support error correction of J decoding error coded blocks of the first data, thereby dynamically supporting error correction of different numbers of erroneous data, relative to all
  • a data is retransmitted (such as the retransmission technique in the prior art), and the second data is transmitted only for the error coded block, which reduces the resources required for retransmission and improves the utilization of the transmission resource.
  • the second data is transmitted together with the first data, and the second data is transmitted only for the error coded block, which not only improves the resource utilization of the first data transmission, but dynamically determines the second data according to the number of coding error coding blocks.
  • the second data may need to feed back the number of coding blocks of the decoding error, without requiring feedback on which coding blocks have decoding errors, thereby saving the feedback process.
  • the data transmitting device may also receive information of the number T of encoding blocks of the second data required for error correction of the first data sent by the data receiving device.
  • the first indication information includes information about the T.
  • the data receiving device may also directly transmit information of the number T of encoding blocks of the second data required for error correction, and the data transmitting device determines the generation and/or transmission scale of the second data according to the received information of the T, thereby dynamically Support is not Correction of the same amount of erroneous data improves the utilization of transmission resources.
  • the data transmitting device may generate third data according to the first data in advance, and determine the second data according to the number of coding error coding blocks in the first indication information or the number of coding blocks of the second data.
  • the transmission size (such as the number of coding blocks) is selected, and part or all of the third data is selected as the second data.
  • the third data includes t coding blocks, and according to the first indication information, it is determined that the actually transmitted second data includes T coding blocks (T is less than or equal to t); and may also directly decode according to the first indication information.
  • Determining the number of blocks or the number of coded blocks of the second data determining the generation and transmission scale of the second data, for example, generating second data including T code blocks according to the first indication information and transmitting, the latter being dynamically adjusted as needed
  • the number of encoders required to generate the second data reduces the implementation complexity.
  • the number T of coding blocks of the second data is greater than or equal to the number J of coding error coding blocks of the first data, so as to support J coding error coding blocks in the first data. Correct decoding.
  • the second data is generated according to the first data, and specifically includes: generating, by encoding the M ⁇ P symbols in the first data, part or all of the symbols of the second data, Where M is the number of coding blocks of the first data, M is an integer greater than or equal to 1, and P is the number of symbols participating in the coding in each coding block of the first data, and the P is taken The value is an integer greater than or equal to 1, and one of the symbols is mapped by at least one bit.
  • the second data includes T coding blocks
  • the first data includes M coding blocks
  • each of the first data coding blocks takes P symbols, and then a group of M ⁇ P symbols generates a part (or all).
  • the two data symbols are placed in the T second data encoding blocks according to a predetermined rule.
  • the symbol may also be composed of at least one bit, and the present application does not limit the specific symbol or the form of the bit participating in the encoding.
  • the data transmitting device transmits the information of the P to the data receiving device.
  • the information of the P may be sent by using control information.
  • the information of the P is used by the data receiving device to jointly decode the first data (such as error correction) by applying the second data. It can be understood that the value of the P can also be known by the data receiving device in a predetermined manner.
  • the data transmitting device transmits information of the number T of encoded blocks of the second data to the data receiving device.
  • the information of the number T of encoded blocks of the second data may be sent by using control information.
  • the second data encoding block quantity information is used by the data receiving device to jointly decode the first data (such as error correction) by applying the second data.
  • the code is an RS code code. It is to be understood that the second data may also be obtained by using other encoding methods for the previously transmitted data, such as a fountain code, a Hamming code, etc., which is not limited in this application.
  • the embodiment of the present application provides a downlink data transmission method, including: receiving, by a data receiving device, second data; wherein the second data is generated according to the first data that is previously transmitted.
  • the second data may be various forms of verification information, such as an outer code, an erasure code, or an outer erasure code. Not limited.
  • the second data is used for error correction of the first data.
  • the first data transmitted in advance refers to service data transmitted before the second data is transmitted or other data that needs to be transmitted.
  • the second data is generated by the first data encoding.
  • the data receiving device sends the first indication information to the data sending device, where the first indication information is used to indicate the decoding status of the first data and/or to indicate the sending of the second data;
  • Device receives second Data, wherein the second data is generated by a first data encoding previously received.
  • the indicating the decoding status of the first data may be that the first indication information includes decoding status information of the first data, and the decoding status information refers to information related to the first data decoding result.
  • the first data is failed to be decoded by one cell, or the number of coding blocks indicating the decoding error in the first data is more detailed, which is not limited by the present application;
  • the indication indicates the sending of the second data.
  • the first indication information may include information related to the second data transmission, for example, by using one cell to indicate whether the second data needs to be sent, or more specifically indicating the number of coding blocks of the second data, etc. Not limited.
  • the data receiving device receives the second data when the first data is decoded incorrectly; wherein the second data is generated by the first data encoded previously received.
  • the data receiving device receives the second indication information, where the second indication information is used to indicate that the second data is jointly decoded with the first data.
  • the second indication information may be sent by using control information.
  • the data receiving device receives control information, where the control information includes merged decoding information (a possible design manner of the foregoing second indication information), where the merged decoding information is used to indicate the second The data is jointly decoded with the first data.
  • the joint decoding includes performing error correction on the first data in combination with the second data.
  • the control information further includes at least one of new data indication information and redundancy version information.
  • the new data indication information is used to indicate whether the second data and/or the first data is an initial transmission; the redundancy version information is used to indicate a redundancy version used for transmission data encoding.
  • the data receiving device sends information of the number J of coding error coding blocks of the first data, where the value of J is an integer greater than or equal to 1.
  • the first indication information includes information about the J.
  • the information of the J is used to determine the number T of coding blocks of the second data, where the value of T is an integer greater than or equal to 1.
  • the data receiving device may also transmit information of the number T of encoded blocks of the second data required for error correction of the first data.
  • the first indication information includes information about the T.
  • the number T of coding blocks of the second data is greater than or equal to the number J of coding error coding blocks of the first data, so as to support J coding error coding blocks in the first data. Correct decoding.
  • the second data is generated according to the first data, and specifically includes: generating, by encoding the M ⁇ P symbols in the first data, part or all of the symbols of the second data, Where M is the number of coding blocks of the first data, M is an integer greater than or equal to 1, and P is the number of symbols participating in the coding in each coding block of the first data, and the P is taken The value is an integer greater than or equal to 1, and one of the symbols is mapped by at least one bit.
  • the data receiving device receives the information of the P.
  • the information of the P may be included in the control information.
  • the information of the P is used by the data receiving device to jointly decode the first data (such as error correction) by applying the second data.
  • the data receiving device receives information of the number T of encoded blocks of the second data.
  • the information of the number T of coding blocks of the second data may be included in the control information.
  • the second data encoding block quantity information is used by the data receiving device to jointly decode the first data (such as error correction) by applying the second data.
  • the joint decoding is a Reed-solomon codes (Reed-Solomon codes) Decoding. It is to be understood that the joint decoding may also be a decoding of other coding modes, such as a fountain code, a Hamming code, etc., which is not limited in this application.
  • an embodiment of the present application provides a data sending device, where the data sending device has a function of implementing the behavior of the data sending device in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the data sending device may be a network side device, such as a base station, or a user equipment.
  • an embodiment of the present application provides a data receiving device, where the data receiving device has a function of implementing the behavior of the data receiving device in the actual method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the data receiving device may be a network side device, such as a base station, or a user equipment.
  • an embodiment of the present application provides a data sending device, where a structure of a data sending device includes a transmitter.
  • the transmitter is configured to support the data transmitting device to send data, information or instructions involved in the above method to the data receiving device, for example, sending the first data and/or the second data to the data receiving device.
  • the structure of the data transmitting device may further include a processor configured to support the data transmitting device to perform a corresponding function in the above method, for example, generating or processing data involved in the above method and / or signaling information (such as indication information, control information, etc.).
  • the data transmitting device may further include a receiver for receiving information or instructions sent by the data receiving device.
  • the data transmitting device may be a network side device, and the data transmitting device may further include a communication unit, where the communication unit is configured to support the data sending device to communicate with other network side devices, for example, Receiving information or instructions sent by other network side devices, and/or sending information or instructions to other network side devices.
  • the structure of the data transmitting device may further include a memory for coupling with the processor to save necessary program instructions and data of the data transmitting device.
  • an embodiment of the present application provides a data receiving device, where a structure of a data receiving device includes a receiver.
  • the receiver is configured to support the data receiving device to receive data or information involved in the foregoing method.
  • the structure of the data receiving device may further include a processor configured to support the data receiving device to perform a corresponding function in the above method.
  • the structure of the data receiving device may further include a transmitter for transmitting the required information or instructions to the data transmitting device.
  • the data receiving device may be a network side device, and the data receiving device may further include a communication unit, where the communication unit is configured to support the data receiving device to communicate with other network side devices, for example, Receiving information or instructions sent by other network side devices, and/or sending information or instructions to other network side devices.
  • the structure of the data receiving device may further include a memory for coupling with the processor to save program instructions and data necessary for the user equipment.
  • an embodiment of the present application provides a communication system, where the system includes the data sending device and the data receiving device.
  • an embodiment of the present application provides a computer storage medium for storing computer software instructions used by the data transmitting device, which includes a program designed to perform the above aspects.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the data receiving device, which includes a program designed to execute the above aspects.
  • the present application provides a data transmission method, apparatus, and system, which are designed to verify the separate transmission of data and service data, that is, to correct the error of the service data when the service data is transmitted incorrectly. It can reduce the waste of resources that may be caused by simultaneous transmission of verification information and business data.
  • FIG. 1 is a schematic diagram of a possible application scenario of the present application
  • FIG. 2 is a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart diagram of a data encoding method according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a data sending device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a data receiving device according to an embodiment of the present disclosure.
  • the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
  • FIG. 1 is a schematic diagram of a possible application scenario of the present application.
  • the UE User Equipment
  • the UE accesses the network side device through the wireless interface for communication, and can also communicate with another user equipment, such as D2D (Device to Device) or M2M (Machine to Machine).
  • D2D Device to Device
  • M2M Machine to Machine
  • the network side device can communicate with the user equipment, and can also communicate with another network side device, such as communication between the macro base station and the access point.
  • the terms “network” and “system” are often used interchangeably, but those skilled in the art can understand the meaning.
  • the user equipment referred to in the present application may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, control devices, or other processing devices connected to the wireless modem, and various forms of user devices ( User Equipment, UE), Mobile Station (MS), Terminal (Terminal) or Terminal Equipment (Terminal Equipment).
  • UEs User Equipments
  • the network side device involved in the present application includes a base station (BS), a network controller, or a mobile switching center, etc., wherein the device that directly communicates with the user equipment through the wireless channel is usually a base station, and the base station may include various a form of a macro base station, a micro base station, a relay station, an access point, or a remote radio unit (RRU), etc., of course, wireless communication with the user equipment may also be another network side device having a wireless communication function.
  • BS base station
  • RRU remote radio unit
  • the name of a device having a base station function may be different, for example, in an LTE network, called an evolved Node B (eNB or eNodeB), at 3G (the In the 3rd Generation, third generation network, it is called Node B and so on.
  • eNB evolved Node B
  • 3G the In the 3rd Generation, third generation network, it is called Node B and so on.
  • the technical solution provided by the present application may be applied to uplink data transmission and/or downlink data transmission.
  • the data sending device may be a user equipment, and the data receiving device may be a network side device, such as a base station;
  • the data transmitting device may be a network side device, such as a base station, and the data receiving device may be a user device.
  • the "check information” or “check data” described in the present application refers to information or data having the ability to correct the target data error, that is, information or data having an error correction function for the target data.
  • the verification information is obtained by encoding the target data.
  • the parity code is a common verification information.
  • the verification information may also be obtained by other coding methods, such as an RS code. (Reed-solomon codes, Reed-Solomon code), fountain code (such as Raptor code) and other coding methods, this application does not limit this.
  • the above-mentioned "check information” may also be referred to as "outer code” or “outer erasure code”, which can be understood by those skilled in the art. meaning.
  • the “data” described in the present application generally refers to service data, but may also include signaling, messages, and the like that the system needs to transmit.
  • the verification information in this application is also referred to as “data”. This application does not limit this.
  • a “coding block” as used in the present application refers to a plurality of bits or a set of a plurality of symbols divided for channel coding. Generally, bits or symbols in one coding block are uniformly channel-coded;
  • a “transport block” refers to a set of bits or symbols that are transmitted during a single transmission, and typically one transport block contains at least one coded block. For example, in the LTE system, the "coded block” is defined as “Code Block”, and the "transport block” is defined as "Transport Block”.
  • FIG. 2 is a schematic flowchart diagram of a data transmission method according to an embodiment of the present application.
  • the data transmitting device receives the first indication information, wherein the first indication information is used to indicate a decoding status of the first data and/or to indicate transmission of the second data.
  • the first indication information may include: information about the number J of coding error coding blocks of the first data, where the value of J is an integer greater than or equal to 1; and/or the second data The information of the number T of coded blocks, where the value of T is an integer greater than or equal to 1.
  • the data transmitting device transmits the second data to the data receiving device, wherein the second data is generated by encoding the first data transmitted previously.
  • the second data may be check information for error correction of the previously transmitted data (such as the first data).
  • the data sending device sends the second indication information to the data receiving device, where the second indication information is used to indicate that the second data is jointly decoded with the first data.
  • the data transmitting device may send control information to the data receiving device, where the control information includes merged decoding information, where the merged decoding information is a possible one of the second indication information.
  • the control information may further include new data indication information, and the data receiving device may use the new data indication information to learn the type of the currently transmitted data, for example, whether it is new service data, or a new one.
  • the second data is either the retransmitted service data or the second data retransmitted.
  • the control information may also indicate the current transmission data or the redundancy version information used in the first data encoding previously transmitted to decode the received data.
  • the control information may also include other types or indications of the content in order to support the data receiving device to know how to process or utilize the received data. It is to be understood that the indication manner of the second indication information and the indicated content may be differently designed according to system requirements, which is not limited in this application.
  • the user equipment may perform data (for example, the foregoing first data and/or the second data) on a PUSCH (Physical Uplink Shared Channel). And the transmission of the corresponding indication information and/or control information on the PUCCH (Physical Uplink Control Channel); for the downlink data transmission, the base station may be in the Physical Downlink Shared Channel (PDSCH) The transmission of the data (for example, the first data and/or the second data) is performed, and the corresponding indication information and/or control information is transmitted on the PDCCH (Physical Downlink Control Channel).
  • PUSCH Physical Uplink Shared Channel
  • PDSCH Physical Downlink Shared Channel
  • the sending timing of the indication information and/or the control information may be performed simultaneously with the transmission data (for example, the first data or the second data) (for example, sending in the same subframe). It can also be performed in a time-sharing manner, which is not limited in this application.
  • the data sending device may generate the third data by encoding the first data when the first data is sent, so that when the decoding error occurs subsequently, select the third data.
  • Part or all of the data is sent as the second data; after receiving the error information of the first data indicated by the data receiving device, the second data may be generated and sent according to the received first indication information; After receiving the error information of the first data information indicated by the data receiving device, generating the third data, and selecting some or all of the third data as the second data to be sent, if After the second data error is sent, the first data still has a decoding error, and some or all of the remaining data in the third data may be sent again as the second data.
  • the data sending device may generate the second data by performing one or more encodings, for example, a parity code, an RS code, a fountain code, a Hamming code, etc., and the specific manner of generating the second data in the present application.
  • the multiple encoding may be performed by separately encoding a plurality of portions of the first data to obtain second data.
  • the second data may perform error correction on one or more coding blocks that fail to decode in the first data, for example, the bits or symbols in the second data may be decoded into the correct coding block in the first data.
  • the bits or symbols in the code are combined and decoded (or jointly decoded) to determine bits or symbols in the coded block that failed to decode, that is, to implement error correction of the first data.
  • the code-related parameters determined by the data sending device in the process of generating and/or transmitting the second data may be sent to the data receiving device by using the control information, so that the data receiving device performs decoding by using the second data.
  • the control information For example, the number of coding blocks of the second data currently transmitted, the manner of grouping the first data when encoding the current second data, and the like.
  • the above information may also be determined by means of a prior agreement, or by other different forms or contents, and the application does not limit this.
  • the data sending device may perform one or more retransmissions on the same second data; or may send multiple different second data for the same first data; or may exceed the second data in the number of errors.
  • the first data itself is directly retransmitted; of course, the first data itself may be retransmitted when one or more error corrections are unsuccessful.
  • the data transmission scheme provided by the present application can be combined with existing data transmission technologies, data retransmission schemes, data transmission feedback schemes, and the like, for example, with HARQ (Hybrid Automatic Repeat Request) The technology is used in combination, and the present application does not limit this.
  • the first data may also be sent together with other data that needs to be sent, for example, the first data is included in M coding blocks in one transport block, and the other coding blocks in the transport block include the other
  • the data to be sent the specific combination form is not limited in this application.
  • the first data may also be sent together with part of the second data. When the first data is decoded incorrectly and the second data sent together cannot complete all error correction, another part is sent or All the second data is used to complete the error correction of the first data.
  • FIG. 3 is a schematic flowchart diagram of another data transmission method according to an embodiment of the present application.
  • the data transmitting device sends data to the data receiving device, and the data transmitted this time is defined as "previously transmitted" data (ie, the first data) with respect to subsequent retransmission data or verification information.
  • This data can be business data. It may also be other types of data that the system needs to send. This application does not limit this; the transmission of this data may be the initial transmission in the system (referred to as initial transmission), or may be retransmission, this application Not limited.
  • the data transmitting device In section 302, the data transmitting device generates third data by encoding the first data, and some or all of the third data may be transmitted as the second data.
  • the third data may be candidate verification information.
  • the process 302 for generating the third data may be performed before the first data transmission 301, that is, the data sending device may generate the third data when processing the data to be transmitted, or may be performed before the second data 306b is sent. That is, the data transmitting device generates the third data when it is determined that the second data needs to be sent.
  • the data processing sequence in this embodiment is only an example and does not constitute a limitation of the embodiment of the present application.
  • the data transmitting device encodes the first data using RS code (Reed-Solomon codes) to generate the third data.
  • RS code Random-Solomon codes
  • the first data includes M coding blocks
  • each coding block includes L ⁇ G bits
  • the third data is generated by encoding the RS code with the parameter (N, K).
  • M, L, and G are integers greater than or equal to 1
  • N is an integer greater than or equal to 2
  • K is an integer greater than or equal to 1
  • t also represents the maximum error correction capability of the RS code with the parameter (N, K) (ie, the maximum number of bits or symbol errors that can be corrected).
  • the RS coding in this embodiment is performed in units of symbols, and one of the symbols may be mapped using one or more bits. It is now assumed that each of the symbols is mapped by G bits, and each of the first blocks of data contains L of said symbols.
  • the coding symbols of the P RS codes are taken from each coding block of the first data.
  • the M coding blocks can obtain M symbols in total, as shown in Table 1.
  • the symbol numbered 1 in the first data optionally, when K>M, the KM may be added at a preset position of the symbols (for example, before M symbols or after M symbols)
  • the symbol 0 is then encoded by the RS to obtain N symbols, such as the symbol labeled 1 in the first data in Table 1 and the symbol labeled 1-12 in the RS1 row in the second data.
  • N symbols such as the symbol labeled 1 in the first data in Table 1 and the symbol labeled 1-12 in the RS1 row in the second data.
  • t coding blocks containing only RS code check symbols can be obtained, and each code block has a length of L symbols.
  • Table 1 gives an example of data composition based on the above assumptions, in each coding block.
  • RS1-RS18 in Table 1 indicates the number of RS codes performed.
  • 1-18 in the first data coding block and 1-12 in the second data coding block used in the table are used to refer to the specific RS code symbol, and do not represent the value of the real RS code symbol.
  • the order of the discharge may also be performed in any order pre-agreed, which is not limited in this application. It can be understood that, in each coding process, the selection of the symbols or bits involved in the coding in the first data can also be designed according to specific requirements, which is not limited in this application.
  • Table 1 shows an example of data composition in the RS encoding process
  • the parameters (N, K) of the RS code may be selected according to different scenarios or decoding errors, and
  • the data receiving device is notified by the control information; of course, it can also be known by the data receiving device in a pre-agreed manner.
  • the data receiving device decodes the first data.
  • the data receiving device can feed back an ACK (acknowledgement) or other representation data.
  • the correctly decoded message is sent to the data transmitting device, that is, part 304a in FIG. 3, the data transmission process is completed, of course, the feedback may not be performed, and the data transmitting device defaults to the first data without receiving feedback. Correctly decoded; if a decoding error occurs, proceed to section 304b.
  • the data receiving device sends the first indication.
  • the information is sent to the data transmitting device.
  • the first indication information may include the number J of coding blocks of the decoding error in the first data or the number T of coding blocks of the second data required for error correction.
  • the first indication information may replace the feedback or indication information of other retransmission technologies, or may coexist with the original feedback or indication information of other retransmission technologies, for example,
  • the first indication information may be sent to the data receiving device together with the NACK (negative acknowledgement) message, or may directly replace the NACK. Message.
  • the threshold t max may be a maximum error correction capability of the second data (for example, a maximum number of coding blocks that can be error-corrected), or may be other values that are set according to system requirements.
  • the threshold may be sent to the data receiving device by using the indication information or the control information, or may be determined in advance, or may be determined according to a specific encoding rule for generating the second data, which is not limited in this application. Limiting the value information of J or T to a maximum value can save the number of bits of the indication information.
  • the data transmitting device determines data that needs to be retransmitted according to the received first indication information. If it is said that the number of coding blocks currently erroneous exceeds the maximum error correction capability of the third data (or the maximum error correction capability of the second data), for example, J>t or T>t, the data transmitting device can select direct weight Pass the first data, part 306a in Figure 3. If the currently decoded coded block can be error-corrected by the second data, for example, J ⁇ t or T ⁇ t, the data transmitting device selects the second data to be transmitted from the third data (or generates the second data).
  • the data sending device determines the value of T according to the received J, so as to ensure that the second data that is sent can correct the coding blocks of the J decoding errors.
  • the data transmitting device directly determines the second data to be transmitted according to the value of T transmitted by the data receiving device.
  • the selection may be performed according to other predetermined rules, such as random selection, etc., which is not limited in this application.
  • the second data to be sent may also be sent after one or more processes such as channel coding, interleaving, and the like in the prior art.
  • each second data to be sent includes a bit or a number of symbols smaller than a size of the currently selected transport block
  • a zero-fill operation may also be performed.
  • each second data is The coded blocks are padded with 0 respectively until the sum of the bits or the number of symbols of the coded block is equal to the size of the currently selected transport block.
  • the second data to be sent may also be combined with other data that needs to be sent (for example, new service data). Then, the second data is included in the T coding blocks in one transport block, and the other coding blocks in the transport block include the other data that needs to be transmitted.
  • the present application does not limit the specific combination form.
  • the data transmitting device transmits the second data determined in the above step.
  • the data sending device sends second indication information to the data receiving device, where the second indication information is used to indicate that the second data is jointly decoded with the first data.
  • the second indication information may be sent in the control information.
  • the data sending device sends control information to the data receiving device, where the control information includes merged decoding information (a possible design manner of the second indication information), where the combined decoding information is used to indicate the current Whether the data needs to be jointly decoded with the previously transmitted data.
  • the control information may further include at least one of new data indication information and redundancy version information.
  • control information includes new data indication information, redundancy version information, and merged decoding information.
  • the merged coding information is represented by 1 bit and is used to indicate whether the currently transmitted data is jointly decoded with the previous transmission data in the same HARQ process. For example, if new data is currently transmitted, then the new data indicates rollover, the merge decoding indication is 0; the current transmission is HARQ retransmission data of some old data (for example, the first data described above), then the new data indicates not to flip.
  • the merge decoding indication is 0, the redundancy version indicates the currently used redundancy version; the current transmission is the second data generated according to some old data (for example, the first data), then the new data indicates the flip,
  • the merge decoding indication is 1, the redundancy version indicates the redundancy version used by the old data; the current transmission is the retransmission data of the second data generated according to some old data (for example, the first data), Then the new data indicates no flipping, the merge decoding indication is 0, the redundancy version indicates the redundancy version used by the old data; the current transmission is another part generated according to some old data (for example, the first data) Two data, then the new data indicates a rollover, the merge decode indication is 1, and the redundancy version indicates the redundancy version used by the old data.
  • the second indication information may also be implemented by other indication manners, which is not limited in this application.
  • the second indication information may also be sent along with the first data and/or the second data.
  • a sequence number eg, SN, Sequence Number
  • the coded block in the same transport block and the coded block containing the check information generated according to the coded block have the same sequence number, and the data receiving device receives the same sequence number information for the received data.
  • the coding block is jointly decoded.
  • the sequence number of the transport block of the first data transmitted in a certain transmission is y
  • the sequence number of the coded block and/or the transport block of the second data generated according to the first data is also y
  • the data receiving device receives the second data and identifies that its serial number is y, it is learned that the second data needs to be jointly decoded with the first data.
  • control information may further include information of the number T of coding blocks of the second data, so that the data receiving device applies the second data according to the information of the T. It can be understood that the information of the T can also be separately sent to the data receiving device.
  • the data receiving device receives the second data and the corresponding second indication information, and jointly decodes the first data in combination with the second data, that is, the first data is combined with the second data. Error correction decoding is performed.
  • the data receiving device performs error correction decoding on the decoded erroneous coded block in association with the decoded first coded data and the currently received second data in the previously accepted first data. If all code blocks that were previously decoded incorrectly are decoded correctly, Then, the data receiving device feeds back the ACK or other means to receive the correct information to the data receiving device, that is, the portion 309b in FIG. 3.
  • the data receiving device can again transmit the information related to the decoding error, that is, the portion 309b in FIG.
  • the data receiving device may again transmit the first indication information related to the decoding error.
  • the first indication information may be sent the same content as the first indication information of the 304b part, that is, the number of coding blocks that are still wrong when the first decoding is still sent.
  • the required number of second data encoding blocks T; or the number of coding blocks of the residual decoding error after the current error correction decoding, or the encoding of the second data required for transmitting the error correction residual error The number of blocks T', where J' and T' are both integers greater than or equal to one.
  • the data transmitting device determines data that needs to be retransmitted based on the first indication information related to the received decoding error. For a specific implementation, reference may be made to the description in section 305, except that the data transmitting device may retransmit the second data included in the T coding blocks that is the same as the previous time, or may select the second data that was sent last time.
  • the T′ coded blocks are transmitted, and the T′ or T code blocks different from the second data sent last time may be selected and transmitted in the third data generated in advance, for example, starting from the J+1th code block. Select T' or T code blocks to transmit as the second data of this time.
  • the data transmitting device can also directly retransmit all the first data, that is, the 311a part in FIG.
  • the data transmitting device sends 310 the determined second data and the second indication information corresponding thereto.
  • the data transmitting device sends 310 the determined second data and the second indication information corresponding thereto.
  • the data receiving device performs error correction decoding on the first data in combination with the received second data and the corresponding second indication information.
  • the data receiving device performs error correction decoding on the first data in combination with the received second data and the corresponding second indication information.
  • the specific implementation refer to the description in section 308.
  • section 314 if the data receiving device successfully decodes the prior data, the ACK message is fed back. DETAILED DESCRIPTION OF THE INVENTION Reference may be made to the description of section 304a.
  • the data receiving device and the data transmitting device can still perform the process described in section 309b-313 one more time until the decoding succeeds. Or reach the maximum number of retransmissions specified by the system.
  • FIG. 4 is a schematic flowchart diagram of still another data transmission method according to an embodiment of the present application.
  • the data transmitting device transmits the first data to the data receiving device.
  • the data receiving device For a detailed description, reference may be made to the description of Section 301.
  • the data receiving device decodes the first data. For a detailed description, refer to the description of section 303.
  • the decoding process if all the first data data are correctly decoded, for example, a CRC (cyclic redundancy cod) check is passed, the data receiving device may feed back an ACK (acknowledgement) or other representation data. All correctly decoded messages are sent to the data transmitting device, that is, part 403a in FIG. 4, the data transmission process is completed, of course, the feedback may not be performed, and the data transmitting device defaults the first data without receiving feedback. Has been correctly decoded; if a decoding error occurs, proceed to section 403b.
  • CRC cyclic redundancy cod
  • the data receiving device sends the first indication information to the data sending device.
  • the indication information may include the number of coding blocks J of the decoding error in the first data, or the encoding of the second data required for error correction.
  • the number of blocks T is given to the data transmitting device.
  • the data transmitting device determines data that needs to be retransmitted according to the received first indication information. If the number of currently generated error coding blocks exceeds the maximum error correction capability of the second data, the data transmitting device may select direct weight Pass the first data, part 406a in Figure 4. If the currently decoded coded block can be error-corrected by the second data, the data transmitting device generates the second data that needs to be transmitted.
  • the data transmitting device generates second data to be transmitted.
  • second data For a specific implementation, reference may be made to the descriptions in sections 302 and 305, and the third data is taken, and some or all of the third data is taken as the second data. The following description may also be adopted.
  • the data transmitting device determines the value of T according to the received J to ensure that the transmitted second data can correct the J coding error coding blocks.
  • the data transmitting device encodes the first data by using an RS code to generate second data.
  • the data transmitting device selects P RS code symbols from each coding block of the first data, and performs the RS coding once after cascading the M ⁇ P RS code symbols, and generates a part of the second data each time RS coding And placed according to the predetermined rules.
  • Each code block of the first data takes out P RS code symbols, and obtains M ⁇ P RS code symbols, such as symbols in the first data corresponding to RS1 in Table 2, and if necessary, increases before these symbols.
  • the remaining data in the last RS encoding is less than K symbols, it may be padded by adding 0, for example, the RS encoding process corresponding to RS5 in Table 2, and then one RS encoding.
  • N RS code symbols are then obtained, such as the first data and the symbols in the second data corresponding to RS1 in Table 2.
  • t/P code blocks of length L containing only the second data can be obtained, wherein the code block of each second data can help correct the coding block error of one first data.
  • RS1-RS5 in Table 2 indicates the number of RS encodings performed.
  • 1-18 in the first data coding block and 1-12 in the second data coding block used in the table are used to refer to the specific RS code symbol, and do not represent the value of the real RS code symbol.
  • the order of the discharge may also be performed in any order pre-agreed, which is not limited in this application. It can be understood that, in each coding process, the selection of the symbols or bits involved in the coding in the first data can also be designed according to specific requirements, which is not limited in this application.
  • P symbols are selected in each coding block in the first RS coding process, and P' symbols are selected in each coding block in the second RS coding process; for example, symbols are selected in each coding block
  • the time may be selected sequentially, or may be random or selected according to some predetermined rule.
  • the parameters (N, K) of the RS code may be selected according to different scenarios or decoding errors, and notified to the data receiving device by using control information; of course, the data receiving device may also be adopted in a pre-agreed manner. know.
  • the second data to be sent may also be sent after one or more processes such as channel coding, interleaving, and the like in the prior art.
  • each second data to be sent includes a bit or a number of symbols smaller than a size of the currently selected transport block
  • a zero-fill operation may also be performed.
  • each second data is The coded blocks are padded with 0 respectively until the sum of the bits or the number of symbols of the coded block is equal to the size of the currently selected transport block.
  • the second data to be sent may also be sent together with other data that needs to be sent (for example, new service data), for example, the second data is included in T coding blocks in one transport block.
  • the other coded blocks in the transport block contain the other data that needs to be transmitted.
  • the present application does not limit the specific combination form.
  • the data transmitting device transmits the second data determined in the above step.
  • DETAILED DESCRIPTION OF THE INVENTION Reference may be made to the description of section 306b.
  • the data sending device sends the second indication information to the data receiving device.
  • the second indication information may further include information of the P determined in the foregoing process, so that the data receiving device applies the second data according to the information of the P. It can be understood that the information of the P can also be sent to the data receiving device separately or sent to the data receiving device in the control information.
  • the data receiving device receives the second data and the corresponding second indication information, and performs error correction decoding on the first data in combination with the second data.
  • the data receiving device performs error correction decoding on the decoded erroneous coded block in association with the decoded first coded data and the currently received second data in the previously accepted first data. If all the coding blocks that were previously decoded incorrectly are decoded correctly, the data receiving device feeds back an ACK or other means to receive the correct information to the data receiving device, that is, part 409 in FIG. 4, and the specific implementation may refer to the description in part 403a. .
  • the content of the indication information, the specific indication manner, and the like provided in the embodiment of the present application may be other designs, and the present application does not limit this.
  • FIG. 5 is a schematic flowchart diagram of a data encoding method according to an embodiment of the present application.
  • the data to be transmitted (for example, the first data that needs to be transmitted earlier) first performs overall CRC generation and attachment, and then the transport block is divided into one or more coded blocks, according to The divided one or more coding blocks generate the second data, and then each coding block separately generates a CRC and performs CRC attachment, each coding block independently performs channel coding and rate matching, and then performs concatenation of coding blocks and sends them to The back end performs other processing (eg, modulation, layer mapping, etc.) and finally sends it.
  • processing of coding block CRC attachment, channel coding, rate matching, and coding block concatenation may also be performed.
  • other processing may be added according to the requirements of the system, or one or more steps may be omitted, which is not limited in this application.
  • FIG. 5 can be used in combination with some or all of the steps in the embodiments corresponding to FIG. 2 to FIG. 4, which is not limited in this application.
  • each network element such as a data transmitting device (network side device or UE), a data receiving device (UE or network side device), etc., in order to implement the above functions, includes a corresponding hardware structure for performing each function and/or Software module.
  • UE data transmitting device
  • UE data receiving device
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • FIG. 6 is a schematic diagram showing a possible structure of a data transmitting device involved in the above embodiment.
  • the data sending device may be a network side device, for example, may be a base station or other network side device having a base station function; or may be a user equipment; or other devices having data sending functions. .
  • a transmitter is included in the structure of the data transmitting device.
  • the receiver of the data transmitting device may also include a receiver.
  • a processor may also be included in the structure of the data transmitting device.
  • the structure of the data transmitting device may further include a communication unit for supporting communication with other network side devices, such as with a core network node. Communication.
  • the structure of the data transmitting device may further include a memory for coupling with the processor to save necessary program instructions and data of the data transmitting device.
  • the structure of the data transmitting device involved in the present application includes a transmitter/receiver 601, a processor 602, a memory 603, and a communication unit 604.
  • the transmitter/receiver 601 is configured to support sending and receiving information between the data transmitting device and the data receiving device in the foregoing embodiment, for example, transmitting the data and/or control information involved, and receiving the foregoing First indication.
  • the processor 602 performs various functions for communicating with a data receiving device.
  • the processor 602 also performs the processing involved in the data transmitting device of FIGS. 2 through 5, such as generating data and/or control information to be transmitted.
  • the memory 603 is used to store program codes and data of the data transmitting device.
  • the communication unit 604 is configured to support communication between the data sending device and other network side devices, such as communication with a core network node.
  • Figure 6 only shows a simplified design of the data transmitting device.
  • the data transmitting device may include any number of transmitters, receivers, processors, memories, etc., and all of them may implement the present application.
  • the data transmission equipment requested is within the protection scope of the present application.
  • Fig. 7 is a simplified schematic diagram showing one possible design structure of the data receiving apparatus involved in the above embodiment.
  • the data receiving device may be a network side device, for example, may be a base station or other network side device having a base station function; or may be a user equipment; or may be another device having a data sending function. .
  • a receiver is included in the structure of the data receiving device.
  • a transmitter may also be included in the structure of the data receiving device.
  • a processor may also be included in the structure of the data receiving device.
  • the data receiving device may be a network side device, and the data receiving device may further include a communication unit, where the communication unit is configured to support the data receiving device to communicate with other network side devices, for example, Receiving information or instructions sent by other network side devices, and/or sending information or instructions to other network side devices.
  • the structure of the data receiving device may further include a memory for coupling with the processor to save program instructions and data necessary for the user equipment.
  • the structure of the data receiving device involved in the present application includes a transmitter 701, a receiver 702, a processor 703, and a memory 704.
  • data or information to be transmitted is adjusted by the transmitter 701 to output samples and generate an uplink signal that is transmitted via an antenna to the data described in the above embodiments.
  • Send the device the device.
  • the antenna receives the downlink signal (including the above data and/or control information) transmitted by the data transmitting device in the above embodiment, and the receiver 702 adjusts the signal received from the antenna and provides input samples.
  • the service data and the signaling message are processed, for example, the received data is decoded or jointly decoded. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems).
  • the processor 703 is further configured to perform control management on an action of the data receiving device, for performing processing performed by the data receiving device in the foregoing embodiment, for example, for controlling the data receiving device to receive downlink information and/or according to the received Downstream information performs other processes of the techniques described herein.
  • the processor 703 is configured to support the data receiving device to perform the processing related to the data receiving device in FIGS. 2 to 5 and 5.
  • the memory 704 is for storing program codes and data for the data receiving device.
  • the processor for performing the above data transmitting device and data receiving device of the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array ( FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, such as one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a data receiving device.
  • the processor and the storage medium can also exist as discrete components in the data receiving device.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

La présente invention concerne le domaine de la technologie de communication sans fil et, en particulier, un système, ainsi qu'un procédé et un appareil de transmission de données dans un système de communication sans fil. Dans cette invention, un procédé de transmission de données est décrit. Ce procédé comprend les étapes suivantes : un dispositif de transmission de données reçoit des premières informations d'indication, ces premières informations d'indication étant utilisées pour indiquer l'état de décodage de premières données et/ou pour indiquer la transmission de secondes données ; le dispositif de transmission de données transmet les secondes données à un dispositif de réception de données, les secondes données étant générées par codage des premières données précédemment transmises. Au moyen de la transmission séparée de données de vérification et de données de service, la présente invention non seulement permet la correction d'erreur de données de service, lorsqu'une erreur se produit pendant la transmission des données de service, mais peut également réduire le gaspillage probable de ressources provoqué par la transmission simultanée d'informations de vérification et de données de service.
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