WO2019170161A1 - Procédé et appareil de notification de qualité de canal - Google Patents

Procédé et appareil de notification de qualité de canal Download PDF

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Publication number
WO2019170161A1
WO2019170161A1 PCT/CN2019/077716 CN2019077716W WO2019170161A1 WO 2019170161 A1 WO2019170161 A1 WO 2019170161A1 CN 2019077716 W CN2019077716 W CN 2019077716W WO 2019170161 A1 WO2019170161 A1 WO 2019170161A1
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Prior art keywords
index
channel quality
cqi
modulation order
mapping table
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PCT/CN2019/077716
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English (en)
Chinese (zh)
Inventor
王坚
戴胜辰
李榕
杜颖钢
黄凌晨
王俊
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华为技术有限公司
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Publication of WO2019170161A1 publication Critical patent/WO2019170161A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • 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
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a method and apparatus for notifying channel quality.
  • a base station In a Long Term Evolution (LTE) system, a base station does not know the quality of a channel before transmitting downlink data to a terminal device. With the continuous evolution of wireless communication systems, the reliability requirements for data transmission are getting higher and higher. For example, in the 5th generation mobile communication technology (also called 5G), high reliability and low latency communication (Ultra-reliable low)
  • 5G 5th generation mobile communication technology
  • URLLC latency communications
  • the present application provides a method for notifying channel quality, which can improve the reliability of data transmission.
  • the application provides a method for notifying channel quality, the method comprising:
  • the terminal device acquires channel quality information
  • the terminal device sends first indication information, where the first indication information is used to indicate an index of the reference CQI;
  • the index of the target CQI may be the same as or different from the index of the reference CQI.
  • the channel quality information includes at least one of a modulation order, a code rate, or a spectral efficiency.
  • mapping relationship between the index of any one of the CQIs and the channel quality information in the mapping table is included in any one of Tables 1 to 96.
  • the mapping table further includes a mapping relationship between an index and an encoding mode of the CQI.
  • the terminal device and the network device pre-store a mapping table that records at least the mapping relationship between the CQI index and the channel quality information.
  • the CQI index is the sequence number quantized by the channel quality, so the index of each CQI can reflect the quality of the channel.
  • the terminal device first measures the quality of the channel, and selects an index of the CQI reflecting the current channel quality from the pre-stored mapping table, and feeds back to the network device.
  • the network device combines the index of the reference CQI fed back by the terminal device, and combines the current network resource condition, determines the channel quality information and the coding mode (if the CQI index corresponds to the coding mode) when the downlink data is sent, and finally selects The index of the target CQI is returned to the terminal device. Subsequently, the network device can transmit data to the terminal device by using channel quality information and an encoding method corresponding to the index of the target CQI (if the index of the CQI corresponds to the encoding mode), thereby improving the reliability of data transmission.
  • the coding mode refers to what code is used to encode the data channel.
  • the coding manner in the embodiment of the present application may include a polarization code (Polar code) and an LDPC BG2, where the LDPC BG2 represents an LDPC obtained according to the base matrix BG2.
  • the present application provides a method for notifying a channel quality, where the method includes: the terminal device receiving indication information from the network device, where the indication information is used to indicate an index of a target CQI;
  • the channel quality information includes at least one of a modulation order, a code rate, or a spectral efficiency.
  • mapping relationship between the index of any one of the CQIs and the channel quality information in the mapping table is included in any one of Tables 1 to 96.
  • the mapping table further includes a mapping relationship between an index and an encoding mode of the CQI.
  • the terminal device sends the uplink data according to the channel quality information and the coding mode (if the CQI index corresponds to the coding mode) corresponding to the received target CQI index.
  • the application provides a method for notifying channel quality, including:
  • the network device determines channel quality information to be used for communication with the terminal device
  • the network device selects an index of the target CQI from the pre-stored mapping table according to the determined channel quality information, where the mapping table includes a mapping relationship between the CQI index and the channel quality information;
  • the network device sends indication information, where the indication information is used to indicate an index of the target CQI.
  • the channel quality information includes at least one of a modulation order, a code rate, or a spectral efficiency.
  • mapping relationship between the index of any one of the CQIs and the channel quality information in the mapping table is included in any one of Tables 1 to 96.
  • the mapping table further includes a mapping relationship between an index and an encoding mode of the CQI.
  • the channel quality information is used for uplink transmission data or downlink transmission data.
  • the index of the target CQI is determined by the network device based on the reference CQI index.
  • the index of the target CQI may be the same as or different from the index of the reference CQI.
  • the network device receives indication information from the terminal device indicating an index of the reference CQI.
  • the plurality of mapping tables designed may be applied to different reliability requirements.
  • a simple and feasible solution is provided for multiple scenarios of different block error rate BLER requirements.
  • the first value set of the modulation order in the mapping table and the first coding mode in the coding mode corresponds to the second coding mode in the coding mode
  • the first value set and the second value set include at least one value of the modulation order.
  • the coding mode can be mapped to the value of the modulation order. For example, when the value of the modulation order is equal to 2, the coding mode adopts a Polar code, and when the modulation order is equal to 4 or 6, the coding mode adopts LDPC BG2.
  • the CQI mapping table does not even need to appear in the coding mode column, but is directly implicitly determined according to the modulation order. It is not listed here one by one.
  • first coding mode and the second coding mode mentioned herein only represent two different coding modes, but it is not limited to which code is specifically used by the first coding mode and the second coding mode.
  • first set of values and the second set of values also represent only two different sets of values, each set of values including at least one value of the modulation order.
  • the modulation order may not be limited to only two sets of values, for example, it may be 3 or 4 sets of values. The relationship between any two sets of values satisfies the relationship between the first set of values and the second set of values.
  • the present application provides an apparatus for notifying a channel quality, the apparatus having the function of implementing the method in any of the above-described first aspects and any one of the possible implementations of the first aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the present application provides an apparatus for notifying a channel quality, the apparatus having the function of implementing the method in any of the above-described second aspects and any one of the possible implementations of the second aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the present application provides an apparatus for notifying a channel quality, the apparatus having the function of implementing the method in any of the above-described third aspects and any one of the possible implementations of the third aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the first aspect or the first aspect described above The method in the implementation.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the foregoing second or second aspects The method in the implementation.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform any of the foregoing third or third aspects The method in the implementation.
  • the present application provides a chip (or a chip system) including a memory and a processor, the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, so that the communication with the chip is installed.
  • the apparatus performs the method of the first aspect above and any one of its possible implementations.
  • the present application provides a chip (or a chip system) including a memory and a processor, the memory is used to store a computer program, and the processor is configured to call and run the computer program from the memory so that the chip is installed.
  • the communication device performs the method of the second aspect described above and any one of its possible implementations.
  • the present application provides a chip (or a chip system) including a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory such that the chip is mounted
  • the communication device performs the method of the third aspect described above and any one of its possible implementations.
  • the application provides a computer program product, comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the first aspect and any possible implementation thereof The method in the way.
  • the application provides a computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the second aspect and any possible implementation thereof The method in the way.
  • the application provides a computer program product, comprising: computer program code, when the computer program code is run on a computer, causing the computer to perform the third aspect and any one of the possible implementations thereof The method in the way.
  • FIG. 1 is a wireless communication system 100 suitable for use in an embodiment of the present application.
  • FIG. 2 is a schematic interaction diagram of a method 200 of notifying channel quality in an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of an apparatus 300 for notifying channel quality according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a terminal device 400 according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of an apparatus 500 for notifying channel quality according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a network device 600 according to an embodiment of the present application.
  • FIG. 1 is a wireless communication system 100 suitable for use in an embodiment of the present application.
  • the wireless communication system can include at least one network device 101 in communication with one or more terminal devices (e.g., terminal device 102 and terminal device 103 shown in FIG. 1).
  • the network device may be a base station, or may be a device integrated with the base station controller, or may be another device having similar communication functions.
  • the terminal is a device having a communication function, and may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to the wireless modem.
  • the terminals can be deployed on land, including indoors or outdoors, handheld or on-board; they can also be deployed on the water (such as ships, etc.); they can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal may be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and an industrial control (industrial) Wireless terminal in control), wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless in transport safety A terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • Terminals can be called different names in different networks, such as: user equipment, mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, laptops, cordless phones, Wireless local loop station, etc.
  • the present application is simply referred to as a terminal.
  • a base station which may also be called a base station device, is a device deployed in a radio access network to provide wireless communication functions.
  • the name of a base station may be different in different wireless access systems.
  • a base station is called a Node B
  • a base station in an LTE network is called a base station.
  • a base station in an LTE network is called a base station.
  • a base station in a new radio (NR) network is called a transmission reception point (TRP) or a generation node B (gNB).
  • TRP transmission reception point
  • gNB generation node B
  • a device that performs base station functions in device-to-device (D2D) or machine-to-machine (M2M) communication, or in a network where other technologies are integrated, or in various other Base stations in an evolved network may also use other names.
  • the invention is not limited to this.
  • the wireless communication system mentioned in the embodiments of the present application includes, but is not limited to, three application scenarios of the next generation 5G mobile communication system, namely, Enhanced Mobile Broadband (eMBB), and high reliability and low latency communication (Ultra Reliable Low Latency). Communication, URLLC) and enhanced Massive Machine Type Communication (eMTC) or new communication systems that will emerge in the future.
  • eMBB Enhanced Mobile Broadband
  • Ultra Reliable Low Latency Ultra Reliable Low Latency
  • Communication URLLC
  • eMTC enhanced Massive Machine Type Communication
  • 5G as a next-generation wireless communication is almost universally recognized and researched in 3GPP and various other international standardization organizations.
  • Channel coding technology is a commonly used method in the field of communication technology to improve the reliability of data transmission.
  • the data channel proposed in 5G will be encoded by Low Density Parity Check (LDPC), and the control channel will be Polar coded.
  • LDPC Low Density Parity Check
  • LDPC is a kind of linear block code with sparse check matrix. That is to say, the check matrix of LDPC code has far more zero elements than non-zero elements, and the distribution of non-zero elements is irregular.
  • a linear block code whose code length is equal to N and whose length of the information sequence is equal to K can be uniquely determined by its check matrix.
  • LDPC codes not only have good performance close to the Shannon limit, but also have low decoding complexity and flexible structure. They are hotspots in the field of channel coding in recent years, and have been widely used in deep space communication, optical fiber communication, satellite digital video and audio broadcasting. And other fields.
  • Quasi-Cyclic Low Density Parity Check is a subclass of LDPC.
  • the parity check matrix of QC-LDPC is obtained by extending a base matrix.
  • the check matrix of QC-LDPC has the characteristics of simple description and easy construction.
  • 3GPP TS 38.212.V15.0.0 2017-12
  • two different base graphs (BG) BG1 and BG2 of LDPC are introduced for LDPC coding. For details, refer to the document 3GPP TS 38.212.V15. 0.0 (2017-12).
  • the Polar code is also a linear block code, and its coding matrix (also called generator matrix) is GN.
  • N ie, code length
  • N 2n
  • n a positive integer.
  • GN is an N ⁇ N matrix, and Defined as the Kronecker product of log2N matrices F2. among them,
  • the addition and multiplication operations involved in the above equations are addition and multiplication operations on the binary Galois field.
  • a part of the bits are used to carry information, called a set of information bits.
  • the set of indices for these bits is denoted A.
  • the other part of the bits is set to a fixed value pre-agreed by the receiving end and the transmitting end, which is called a fixed bit set or a set of frozen bits, and the set of indexes is represented by the complement set Ac of A.
  • the encoding process of the Polar code is equivalent to
  • FN(A) is a sub-matrix obtained in the FN by the row corresponding to the index in the set A.
  • FN(AC) is a sub-matrix obtained in the FN by the row corresponding to the index in the set AC.
  • u A is The set of information bits in the number is K. for A fixed set of bits in the number (NK) that is a known bit.
  • u A is In the information bit set, u A is the row vector of length K, ie
  • K, the symbol
  • the submatrix obtained by the rows corresponding to the index in A, F N (A) is an N ⁇ N matrix.
  • the construction process of the Polar code that is, the selection process of the set A, determines the performance of the Polar code.
  • the technical solution of the embodiment of the present application is applicable to a scenario in which a channel quality indicator CQI is reported to a network device by a terminal device to improve data transmission reliability.
  • the process of the method for notifying the channel quality in the embodiment of the present application is described below by taking the URLLC scenario in the new radio (NR) technology in the 5G as an example.
  • FIG. 2 is a schematic interaction diagram of a method 200 for notifying channel quality according to an embodiment of the present application. It should be understood that steps 210 through 260 are merely illustrative of the process of method 200 for notifying channel quality, and that method 200 should not be limited. These steps can also be split into more steps or combined into fewer steps.
  • the terminal device acquires channel quality information, and selects an index of the reference CQI from the pre-stored mapping table according to the obtained channel quality information.
  • the channel quality information may include at least one of a modulation order, a code rate, or a spectral efficiency.
  • the channel quality information acquired by the terminal device may reflect the quality of the current channel.
  • the quality of the channel can be quantified as an index of the Channel Quality Indicator (CQI).
  • CQI Channel Quality Indicator
  • the mapping table referred to herein may also be referred to as an index table of CQI or a modulation and coding scheme (MCS) table.
  • the mapping table includes a mapping relationship between the index of the CQI and the channel quality information, for example, a mapping relationship including an index of the CQI and at least one of a modulation order, a code rate, or a spectrum efficiency.
  • the modulation order determines the number of bits transmitted in one symbol.
  • Quadrature Phase Shift Keying corresponds to a modulation order of 2
  • 16QAM Quadrature Amplitude Modulation
  • 64QAM has a modulation order of 6 .
  • the code rate is the ratio between the number of information bits in the transport block and the total number of bits of the physical channel.
  • Spectrum efficiency represents the information bits that a resource element (RE) can carry.
  • the network device does not know the condition of the data channel before transmitting the downlink data.
  • the terminal device can measure the quality of the channel and feed back to the network device.
  • the communication protocol quantizes the channel quality to a sequence of 0-15 and is defined as CQI.
  • Each CQI corresponds to an index (hereinafter referred to as an index of CQI). Since the CQI that the terminal device feeds back to the network device is only used as a reference, the index of the CQI that the terminal device feeds back to the network device herein is referred to as the index of the reference CQI.
  • the terminal device sends the first indication information to the network device, where the network device receives the first indication information.
  • the first indication information is used to indicate an index of the reference CQI.
  • the form of the first indication information is not limited herein.
  • a person skilled in the art can easily think of a plurality of possible ways for the terminal device to report the index of the reference CQI to the network device.
  • the terminal device can indicate the index of the reference CQI to the network device by 4 bits, representing up to 16 possibilities.
  • the 4 bits are only an example. If the number of CQIs is smaller, the number of bits required is smaller. If the number of CQIs is larger, the number of bits required is larger.
  • the network device determines channel quality information that is actually needed to transmit data, such as modulation order, code rate, or spectrum efficiency.
  • the network device may determine channel quality information, such as modulation order, code rate, or spectrum efficiency, that the transmission data actually needs to be used according to the network resource condition.
  • channel quality information corresponding to the reference CQI such as the modulation order, the code rate, or the spectrum efficiency
  • the mapping table in combination with the index of the reference CQI reported by the terminal device, so that the current channel quality may be known, and the transmission data may be determined.
  • Channel quality information that is actually required such as modulation order, code rate, or spectral efficiency.
  • the network device selects an index of the target CQI from the pre-stored mapping table according to channel quality information, such as modulation order, code rate, or spectrum efficiency, which is actually required to transmit the data.
  • the index of the target CQI actually used may be the same as or different from the index of the reference CQI.
  • the mapping table includes a mapping relationship between the index of the CQI and the channel quality information. It is not difficult to understand that the CQI mapping table adopted by the network device and the terminal device is consistent.
  • the network device sends second indication information to the terminal device, where the terminal device receives the second indication information from the network device.
  • the second indication information indicates an index of the target CQI.
  • the terminal device determines, according to the index of the target CQI, channel quality information corresponding to the index of the target CQI from the mapping table, for example, determining at least one of a modulation order, a code rate, and an encoding manner.
  • the subsequent terminal device processes the received data according to the determined modulation order and code rate.
  • the target CQI can be the same as or different from the reference CQI.
  • the network device can determine channel quality information, such as modulation order, code rate, or spectrum efficiency, that is actually needed to transmit data according to the current network resource condition, so as to select a modulation order, a code rate, or a spectrum that is actually needed from the mapping table.
  • the index of the target CQI corresponding to the efficiency.
  • the network device may also select an index of the target CQI in combination with the current network resource condition and the index of the reference CQI.
  • the network device notifies the terminal device of the selected index of the target CQI by using the second indication information.
  • the network device refers to the current channel quality before sending the data, and therefore, the reliability of the data transmission can be improved.
  • the mapping table when the mapping table is applied to uplink data transmission, the principle is similar, except that the terminal device does not need to feed back the index of the CQI, and the network device can directly determine the modulation order used by the uplink according to the uplink channel, At least one of a code rate and an encoding mode, and determining an index of a target CQI required for transmitting the uplink data according to the mapping table, and transmitting the index to the terminal device by using the indication information.
  • the terminal device may determine the modulation order and the code rate corresponding to the index of the received target CQI according to the received index of the target CQI and the mapping table, and process the uplink data to be sent according to the determined modulation order and code rate.
  • the mapping table further includes coding mode information, and the coding mode is also considered when determining the index of the reference CQI or the index of the target CQI, and correspondingly, when the terminal receives the index of the target CQI, The encoding method is determined according to the index of the target CQI.
  • the manner of determining the index of the specific target CQI in the uplink and downlink transmission is consistent with the foregoing embodiment, and details are not described herein again.
  • 5G As a next-generation wireless communication technology has received extensive attention and research in 3GPP and various other international standardization organizations. It can meet the operator's customized needs for various industrial, vertical markets and various virtual operations.
  • 5G includes three major scenarios: Enhanced Mobile Broad Band (eMBB), Ultra-reliable low latency communications (URLLC) and Massive Machine Type Communications (mMTC).
  • eMBB Enhanced Mobile Broad Band
  • URLLC Ultra-reliable low latency communications
  • mMTC Massive Machine Type Communications
  • the target block error rate (BLER) of the URLLC scenario is recognized to be less than 10%, and even needs to include 10-4 (ie, 1e-4) or lower.
  • the URLLC scenario includes a plurality of different use cases, and different usage scenarios have different requirements for the BLER, and the span is larger. It is not appropriate to design only one mapping table. For example, if the data transmission of multiple usage scenarios uses the same mapping table, there may be some BLERs that cannot use the scenario, and some BLERs that use the scenario are too
  • the present application proposes a design scheme of a mapping table, which aims to design a mapping table that can meet different BLER requirements.
  • the reliability of data transmission can be guaranteed to a certain extent.
  • mapping table designed by this application is described in detail below.
  • mapping table forms given in this paper, for the sake of clarity, we will introduce them according to the coding methods involved in the mapping table.
  • mapping table forms In each coding mode, according to different target BLER pairs and the system's limitation on the code rate, some mapping forms of the mapping table are respectively given.
  • mapping table The coding methods involved in the mapping table given below include: Polar and LDPC BG2, where LDPC BG2 represents the LDPC obtained from the base matrix BG2.
  • the minimum code rate and the maximum code rate are generally specified.
  • the signal-to-noise ratio (SNR) of the same mapping table or the same signal-to-noise ratio (signal-) is adopted.
  • To-interference-noise ratio (SINR) range without loss of generality, SNR is taken as an example below).
  • SINR To-interference-noise ratio
  • the table corresponding to the target BLER further determines the order of the CQI index according to the SNR to obtain information such as a code rate, a spectrum efficiency, and/or a modulation mode, and may also determine an index of the CQI according to the SNR, and then determine a corresponding table according to the target BLER to obtain a code.
  • Information such as rate, spectral efficiency and/or modulation method has certain flexibility. For example, when designing a mapping table specifically, if two target BLERs are considered, the two target BLERs are considered in pairs.
  • the code rate is high, and more information bits can be transmitted, and the information rate of the target BLER having a smaller value is lower, and the information that can be transmitted is lower. Less bits.
  • the minimum code rate is for a target BLER with a smaller value and the maximum code rate is for a target BLER with a larger value.
  • mapping table designed by this application is given below. It should be noted that the code rate in all the tables in this paper is not the actual code rate, and the actual code rate should be the value of the 'code rate' in the table divided by 1024. This is also a common representation in the industry.
  • the value of the maximum bit rate under the highest order modulation in the table corresponding to the low target BLER, CR/1024 is the maximum bit rate under the actual highest order modulation
  • four target BLER pairs are taken as ⁇ 1e-3, 1e-5 ⁇ , ⁇ 1e-1, 1e-5 ⁇ , ⁇ 1e-2, 1e-4 ⁇ and ⁇ 1e-1, 1e-4. ⁇ .
  • the minimum efficiency of all target BLER pairs is 30/1024*2, and the maximum efficiency takes 4 possibilities (ie 666/1024*6,772/1024*6, 873/1024*6, 948/1024*6)
  • the values in these tables can get better performance, so it is a better value.
  • the coding method only involves the LDPC BG2 code.
  • the target BLER is 1e-3
  • the terminal device selects the index of the reference CQI, or the network device selects the index of the target CQI to follow this principle.
  • the terminal may read the corresponding spectrum efficiency, code rate or modulation order from Table 1 for downlink data reception or uplink data transmission according to the index. Similarly, all the tables in this paper apply this principle.
  • the target BLER is 1e-3
  • the target BLER is 1e-3
  • the target BLER is 1e-3
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.1211 62 2 2 0.1934 99 2 3 0.3125 160 2 4 0.4824 247 2 5 0.7109 364 2 6 0.9902 507 2 7 1.3047 668 2 8 1.6016 410 4 9 2.0703 530 4 10 2.5625 656 4 11 3.0469 780 4 12 3.4297 878 4 13 4.0723 695 6 14 4.6465 793 6 15 5.1152 873 6
  • the target BLER is 1e-1
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • mapping between the CQI index and the spectrum efficiency, the code rate, and the modulation order is included in the above table 1-32.
  • the index and the spectrum of the CQI may be included in the table 1-32.
  • the mapping table actually used may be part of any of the above Tables 1-32.
  • the index of the CQI is greater than 16
  • any one of the above tables 1 to 32 may be part of the mapping table actually used.
  • the index number of the CQI may also change accordingly.
  • the coding method includes LDPC BG2 and Polar.
  • This section can also make some adjustments to the mapping table, which directly corresponds to the modulation mode and the coding mode, which is convenient for engineering use.
  • QPSK with modulation order of 2 uses Polar
  • modulation order of 4 is 16QAM and modulation order.
  • LDPC BG2 is used for 6 64QAM, ie all the following adjusted tables (tables with serial number 32+2x, where x is an integer greater than 1). It can also be said that the idea of adjusting the mapping table is that the value of the modulation order has a mapping relationship with the encoding mode. In these adjusted CQI mapping tables, even the column of encoding mode does not need to appear again, and it is an implicit indication based on the modulation order.
  • Target BLER is 1e-3
  • Target BLER is 1e-5
  • the target BLER is 1e-3
  • the target BLER is 1e-3
  • the target BLER is 1e-3
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-1
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • the target BLER is 1e-2
  • Tables 33-96 For convenience of description, the mapping between CQI index and spectral efficiency, code rate, and modulation order is included in Tables 33-96 above. However, in practical applications, Table 33-96 may only include CQI index and spectrum. A mapping relationship between at least one of efficiency, code rate, and modulation order. Alternatively, the mapping between the index of the CQI and the encoding mode may be further included in Tables 33-96.
  • the mapping table actually used may be part of any of the above tables 33-96.
  • the index of the CQI is greater than 16
  • any of the above tables 33-96 may be part of the mapping table actually used.
  • the index number of the CQI may also change accordingly.
  • the mapping relationship between the index, the spectrum efficiency, the code rate, the efficiency, or the coding mode of any CQI may satisfy all the mapping relationships shown in one of the above tables, or may only satisfy the partial mapping relationship of a certain table.
  • the index between the CQI index of the first column and the other columns of the mapping table may satisfy only the mapping relationship shown by a certain row or a certain row, and may also satisfy the mapping relationship shown by each row in the entire table.
  • the index of the CQI can satisfy the mapping relationship shown in the table only with a certain column or columns in the row.
  • the embodiment of the present application is not limited.
  • the method for notifying the channel quality in the embodiment of the present application is described in detail above.
  • the method for notifying the channel quality provided by the embodiment of the present application can improve the reliability of data transmission.
  • mapping tables of the embodiments of the present application can meet different reliability requirements.
  • a simple and feasible solution is provided for the usage scenarios of different BLER requirements. For example, it can be applied to different use cases of the URLLC scene of the NR.
  • FIG. 3 is a schematic block diagram of an apparatus 300 for notifying channel quality according to an embodiment of the present application.
  • the device 300 mainly includes a processing unit 310 and a transceiver unit 320.
  • the processing unit 310 is configured to acquire channel quality information, such as modulation order, code rate, and/or spectral efficiency, and select a reference CQI from a pre-stored mapping table (for example, Table 1 to Table 96 above) according to the acquired channel quality information.
  • a pre-stored mapping table for example, Table 1 to Table 96 above
  • the mapping table includes a mapping relationship between the CQI index and the channel quality information;
  • the transceiver unit 320 is configured to send first indication information to the network device, where the first indication information is used to indicate an index of the reference CQI;
  • the transceiver unit 320 is further configured to receive second indication information from the network device, where the second indication information is used to indicate an index of the target channel quality indication CQI;
  • the processing unit 310 is further configured to determine, according to an index of the target CQI, channel quality information corresponding to the target CQI, that is, at least one of a modulation order, a code rate, and/or an encoding manner.
  • the device 300 is suitable for both uplink transmission and downlink reception.
  • FIG. 4 is a schematic structural diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes one or more processors 401, one or more memories 402, and one or more transceivers 403.
  • the processor 401 is configured to control the transceiver 403 to send and receive signals
  • the memory 402 is used to store a computer program
  • the processor 401 is configured to call and run the computer program from the memory 402, so that the terminal device 400 performs the execution by the terminal device in the embodiment of the present application.
  • the memory 402 and the transceiver 403 can be coupled through a bus or an interface, or can be integrated together, and details are not described herein again.
  • processing unit 310 can be implemented by processor 401
  • transceiver unit 320 can be implemented by transceiver 403, and the like.
  • the present application provides a computer readable storage medium having stored therein computer instructions that, when executed on a computer, cause the computer to perform a corresponding execution by the terminal device in a method of notifying channel quality Operation and / or process.
  • the application also provides a computer program product comprising computer program code, when the computer program code is run on a computer, causing the computer to perform a corresponding operation and/or process performed by the terminal device in a method of notifying channel quality .
  • the present application also provides a chip (or chip system) including a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device on which the chip is installed performs a notification
  • a chip or chip system
  • the processor for calling and running the computer program from the memory, such that the communication device on which the chip is installed performs a notification
  • the corresponding operations and/or processes performed by the terminal device, the memory and the transceiver can be coupled through the bus or integrated.
  • the communication device referred to herein may be a terminal device.
  • FIG. 5 is a schematic block diagram of an apparatus 500 for notifying channel quality according to an embodiment of the present application.
  • the device 500 mainly includes a processing unit 510 and a transceiver unit 520.
  • the processing unit 510 is configured to determine channel quality information, such as a modulation order, a code rate, or a spectrum efficiency, that is to be used for sending data, and select an index of the target CQI from the pre-stored mapping table according to the determined channel quality information, where the mapping is performed.
  • the table includes a mapping relationship between an index of CQI and channel quality information, where channel quality information includes, but is not limited to, at least one of modulation order, code rate, or spectral efficiency;
  • the transceiver unit 520 is configured to send second indication information to the terminal device, where the second indication information is used to indicate an index of the target CQI.
  • device 500 can be a chip or an integrated circuit.
  • FIG. 6 is a schematic structural diagram of a network device 600 according to an embodiment of the present application.
  • network device 600 includes one or more processors 601, one or more memories 602, and one or more transceivers 603.
  • the processor 601 is configured to control the transceiver 603 to send and receive signals
  • the memory 602 is used to store a computer program
  • the processor 601 is configured to call and run the computer program from the memory 602, so that the network device 600 executes the network device in the embodiment of the present application.
  • the memory 602 and the transceiver 603 can be coupled through a bus or an interface, or can be integrated together, and details are not described herein again.
  • apparatus 500 shown in FIG. 5 can be implemented by the terminal device 600 shown in FIG. 6.
  • processing unit 510 can be implemented by processor 601.
  • Transceiver unit 520 can be implemented by transceiver 603.
  • the present application provides a computer readable storage medium having stored therein computer instructions for causing a computer to perform a corresponding execution by a network device in a method of notifying channel quality when the computer instructions are run on a computer Operation and / or process.
  • the application also provides a computer program product comprising computer program code, when the computer program code is run on a computer, causes the computer to notify the channel quality of the corresponding operations and/or processes performed by the network device.
  • the present application also provides a chip (or chip system) including a memory and a processor for storing a computer program, the processor for calling and running the computer program from the memory, so that the communication device on which the chip is installed notifies the channel
  • a chip or chip system
  • the processor for calling and running the computer program from the memory, so that the communication device on which the chip is installed notifies the channel
  • the corresponding operations and/or processes performed by the network device in the quality method, the memory and the transceiver can be coupled through the bus or integrated.
  • the processor may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or an off-the-shelf A field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, microprocessor, or one or more integrated circuits for controlling the execution of the program of the present application.
  • the processor can include a digital signal processor device, a microprocessor device, an analog to digital converter, a digital to analog converter, and the like.
  • the processor can distribute the control and signal processing functions of the mobile device among the devices according to their respective functions.
  • the processor can include functionality to operate one or more software programs, which can be stored in memory.
  • the functions of the processor may be implemented by hardware or by software executing corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the memory may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type that can store information and instructions. Dynamic storage device. It can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, or a disc storage (including a compact disc, a laser disc, a compact disc, a digital versatile disc, a Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other device that can be used to carry or store desired program code in the form of an instruction or data structure and accessible by a computer. Medium, but not limited to this.
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • disc storage including a compact disc, a laser disc, a compact disc, a digital versatile disc, a Blu-ray disc, etc.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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Abstract

L'invention concerne un procédé de notification de la qualité de canal. Le procédé comprend les étapes suivantes : un dispositif terminal acquiert des informations de qualité de canal ; le dispositif terminal sélectionne un indice d'une indication de qualité de canal (CQI) de référence à partir d'une table de mappage pré-mémorisée en fonction des informations de qualité de canal acquises, la table de mappage comprenant une relation de mappage entre l'indice de la CQI et les informations de qualité de canal ; le dispositif terminal envoie des premières informations d'indication, les premières informations d'indication étant utilisées pour indiquer l'indice de la CQI de référence ; le dispositif terminal reçoit des secondes informations d'indication en provenance d'un dispositif de réseau, les secondes informations d'indication étant utilisées pour indiquer un indice d'une indication de qualité de canal (CQI) cible ; et le dispositif terminal détermine, en fonction de l'indice de la CQI cible, des informations de qualité de canal correspondant à la CQI cible à partir de la table de mappage. Les informations de qualité de canal comprennent au moins un élément parmi un ordre de modulation, un débit de code et un mode de codage.
PCT/CN2019/077716 2018-03-09 2019-03-11 Procédé et appareil de notification de qualité de canal WO2019170161A1 (fr)

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