WO2019214427A1 - 通知信道质量的方法和装置 - Google Patents

通知信道质量的方法和装置 Download PDF

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Publication number
WO2019214427A1
WO2019214427A1 PCT/CN2019/083824 CN2019083824W WO2019214427A1 WO 2019214427 A1 WO2019214427 A1 WO 2019214427A1 CN 2019083824 W CN2019083824 W CN 2019083824W WO 2019214427 A1 WO2019214427 A1 WO 2019214427A1
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Prior art keywords
channel quality
index
cqi
mapping table
quality information
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PCT/CN2019/083824
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English (en)
French (fr)
Inventor
王坚
戴胜辰
李榕
杜颖钢
王俊
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华为技术有限公司
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Publication of WO2019214427A1 publication Critical patent/WO2019214427A1/zh

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    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

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 36.
  • 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 when the downlink data is sent, and returns the index of the finally selected target CQI to the terminal device.
  • the network device can transmit data to the terminal device by using channel quality information corresponding to the index of the target CQI, so that the reliability of data transmission can be improved.
  • 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 36.
  • the terminal device sends uplink data according to channel quality information corresponding to the index of the received target CQI.
  • 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 36.
  • 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 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 BLER performance diagram corresponding to a partial code rate according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of an apparatus 300 for notifying channel quality according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a terminal device 400 according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of an apparatus 500 for notifying channel quality according to an embodiment of the present application.
  • FIG. 7 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 polarized Polar coded. Without loss of generality, the present application uses an LDPC code as a channel coding as an example.
  • 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 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.
  • 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 and the reference CQI index may be the same or different.
  • 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 channel quality information corresponding to the index of the target CQI from the mapping table according to the index of the target CQI, for example, determines at least one of a modulation order, a code rate, and a spectrum efficiency.
  • 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 a spectrum efficiency, and determining an index of a target CQI required to transmit 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.
  • mapping table designed by this application is described in detail below.
  • the coding scheme used in the mapping table given below is LDPC BG2, but the design principles are equally applicable to other forms of channel coding.
  • the target block error rate (BLER) of the URLLC scenario is 10 -1 (ie, 1e-1) or 10 -5 (ie, 1e-5) according to different application scenarios, and the target BLER is 1e.
  • the CQI mapping table of the -1 reuses the table used in the existing eMBB scenario, and details are not described herein again.
  • the present application only designs the CQI mapping table for the scenario where the target BLER is 1e-5.
  • SNR signal-to-noise ratio
  • SINR signal-to-interference-noise ratio
  • the minimum code rate and the maximum code rate are generally specified.
  • the general method is to obtain the SNR that can support the given coverage requirement of the cell through system simulation.
  • the SNR requirement we find that the maximum spectral efficiency corresponding to the target BLER is 772/1024*6, and the minimum spectral efficiency is 30/1024*2. Between ⁇ 50/1024*2, the typical four possible values are 30/1024*2, 36/1024*2, 40/1024*2, 50/1024*2.
  • the CQI mapping table design can be performed by simulation. Since the CQI mapping table with the target BLER of 1e-1 has been determined, in order to simplify the system implementation complexity, the CQI mapping table entry with the target BLER of 1e-5 designed according to the simulation result can be adjusted within a certain range, so that The items of the CQI mapping table with the target BLER of 1e-1 are reused as much as possible without affecting the performance of the system.
  • the "index" in the table is the index of the CQI.
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0703 36 2 2 0.1465 75 2 3 0.252 129 2 4 0.4023 206 2 5 0.6055 310 2 6 0.873 447 2 7 1.1758 602 2 8 1.4063 360 4 9 1.8633 477 4 10 2.3242 595 4 11 2.5488 435 6 12 3.0879 527 6 13 3.6797 628 6 14 4.1719 712 6 15 4.5234 772 6
  • 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 CQI mapping table is as follows:
  • Adjust Table 1 to maximize the reuse of LTE CQI mapping table entries. For example, if the code rate corresponding to the LTE CQI mapping table entry in Table 1 is between -10/1024 and +10/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0703 36 2 2 0.1523 78 2 3 0.2344 120 2 4 0.4023 206 2 5 0.6016 308 2 6 0.877 449 2 7 1.1758 602 2 8 1.4063 360 4 9 1.8633 477 4 10 2.3242 595 4 11 2.5488 435 6 12 3.0879 527 6 13 3.6797 628 6 14 4.1719 712 6 15 4.5234 772 6
  • Adjust Table 1 to maximize the reuse of LTE CQI mapping table entries. For example, if the code rate corresponding to the LTE CQI mapping table entry in Table 1 is between -20/1024 and +20/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 5 to maximize the reuse of LTE CQI mapping table entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 5 is between -5/1024 and +5/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 5 to maximize the reuse of LTE CQI mapping table entries. For example, if the code rate corresponding to the entry rate of the entry in Table 5 and the LTE CQI mapping table entry are between -10/1024 and +10/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 5 to maximize the reuse of LTE CQI mapping table entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 5 is between -20/1024 and +20/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • the minimum spectral efficiency is 40/1024*2
  • Adjust Table 9 to maximize the reuse of LTE CQI mapping entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 9 is between -5/1024 and +5/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 9 to maximize the reuse of LTE CQI mapping entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 9 is between -10/1024 and +10/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 9 to maximize the reuse of LTE CQI mapping entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 9 is between -20/1024 and +20/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 13 to maximize the reuse of LTE CQI mapping table entries. For example, when the code rate corresponding to the LTE CQI mapping table entry in Table 13 is between -5/1024 and +5/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 13 to maximize the reuse of LTE CQI mapping table entries. For example, if the code rate corresponding to the LTE CQI mapping table entry in Table 13 is between -10/1024 and +10/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • Adjust Table 13 to maximize the reuse of LTE CQI mapping table entries. For example, if the code rate corresponding to the LTE CQI mapping table entry in Table 13 is between -20/1024 and +20/1024, the LTE CQI mapping table entry is reused, and the obtained CQI mapping table is obtained. as follows:
  • the minimum efficiency entry of the CQI mapping table may also be between 31/1024*2 ⁇ 39/1024*2, when the minimum efficiency is 31/1024*2, 32.
  • the corresponding CQI mapping table is as follows.
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0645 33 2 2 0.1367 70 2 3 0.2422 124 2 4 0.3887 199 2 5 0.5898 302 2 6 0.8535 437 2 7 1.1582 593 2 8 1.3828 354 4 9 1.8438 472 4 10 2.3086 591 4 11 2.5313 432 6 12 3.0762 525 6 13 3.6738 627 6 14 4.166 711 6 15 4.5234 772 6
  • the possible CQI mapping table may be any one of the following Tables 25 to 36, noting the spectral efficiency corresponding to the indexes 3-15 in these tables.
  • the code rate and the modulation order are the same, that is, the CQI mapping table entries in the eMBB are reused.
  • index 1 can adopt the minimum code rate selected in the design methods in Tables 1 to 24 above, and then find a corresponding rate index (or spectral efficiency) index between the minimum code rate and 78 through the simulation result. 2.
  • the spectral efficiency value corresponding to the added item may be any number of 30/1024*2 to 50/1024*2 or any one that satisfies the requirement is less than 78.
  • an index will be vacated in the required CQI mapping table as a reserved value, without loss of generality, assuming index 1 is reserved, and index 3-15 reuses in Table 25 to Table 36. Index 3-15.
  • the entry corresponding to index 2 in the required CQI mapping table may be an entry corresponding to the spectrum efficiency less than 78/1024*2 in any of the above Tables 1-24, for example, may be a table. 1 to Table 24, the entry corresponding to index 1. I will not list them here.
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0586 30 2 2 0.0996 51 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0645 33 2 2 0.1035 53 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0664 34 2 2 0.1055 54 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0703 36 2 2 0.1074 55 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0742 38 2 2 0.1094 56 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0762 39 2 2 0.1113 57 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • index Spectral efficiency Code rate Modulation order 0 - - - 1 0.0977 50 2 2 0.123 63 2 3 0.1523 78 2 4 0.2344 120 2 5 0.377 193 2 6 0.6016 308 2 7 0.877 449 2 8 1.1758 602 2 9 1.4766 378 4 10 1.9141 490 4 11 2.4063 616 4 12 2.7305 466 6 13 3.3223 567 6 14 3.9023 666 6 15 4.5234 772 6
  • the mapping between the CQI index and the spectrum efficiency, the code rate, and the modulation order is included in Tables 1 to 36 above, but in the actual application, the indexes of the CQI may be included in Tables 1 to 36.
  • the mapping relationship with at least one of spectral efficiency, code rate, and modulation order, or the arrangement of index numbers is different.
  • the mapping table actually used may be a part of any one of the above Tables 1 to 36.
  • the index of the CQI is greater than 16
  • any part of any of the above Tables 1 to 36 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, or the efficiency 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 can meet different reliability requirements. For example, it can be applied to different scenarios of the URLLC of the NR.
  • FIG. 4 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 36 above) according to the acquired channel quality information.
  • a pre-stored mapping table for example, Table 1 to Table 36 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 indicator 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 a spectrum efficiency.
  • the device 300 is suitable for both uplink transmission and downlink reception.
  • FIG. 5 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.
  • apparatus 300 shown in FIG. 4 can be implemented by the terminal device 400 shown in FIG. 5.
  • 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. 6 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. 7 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.
  • 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 codes. .

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Abstract

本申请提供了一种通知信道质量的方法，该方法包括：终端设备获取信道质量信息；终端设备根据所述获取的信道质量信息，从预存的映射表中选取参考信道质量指示CQI的索引，所述映射表包括CQI的索引和信道质量信息的映射关系；所述终端设备发送第一指示信息，所述第一指示信息用于指示所述参考CQI的索引；所述终端设备从所述网络设备接收第二指示信息，所述第二指示信息用于指示目标信道质量指示CQI的索引；所述终端设备根据所述目标CQI的索引，从所述映射表中确定所述目标CQI对应的信道质量信息。其中信道质量信息包括调制阶数、码率和频谱效率中的至少一种。

Description

通知信道质量的方法和装置 技术领域
本申请涉及通信技术领域，更具体地，涉及一种通知信道质量的方法和装置。
背景技术
在长期演进(Long Term Evolution,LTE)系统中，基站在向终端设备发送下行数据之前，并不知道信道质量的好坏。而随着无线通信系统的不断演进，对于数据传输的可靠性要求越来越高，例如在第5代移动通信技术(也称5G)中，高可靠性低时延通通信(Ultra-reliable low latency communications，URLLC)场景对数据传输可靠性的要求极高，在一些应用场景下甚至需要低于1e-9。容易想到的是，基站在完全不清楚信道质量的情况下发送下行数据，传输的可靠性则难以保证。
目前，对于如何满足未来通信系统中对于数据传输可靠性的高要求，业界缺乏一种可行的方案。
发明内容
本申请提供一种通知信道质量的方法，能够提高数据传输的可靠性。
第一方面，本申请提供一种通知信道质量的方法，所述方法包括：
终端设备获取信道质量信息；
所述终端设备根据获取的信道质量信息，从预存的映射表中选取参考信道质量指示CQI的索引，所述映射表包括CQI的索引和信道质量信息之间的映射关系；
所述终端设备发送第一指示信息，所述第一指示信息用于指示所述参考CQI的索引；
所述终端设备从所述网络设备接收第二指示信息，所述第二指示信息用于指示目标CQI的索引；
所述终端设备根据所述目标CQI的索引，从所述映射表中确定所述目标CQI对应的信道质量信息。
在一种可能的设计中，目标CQI的索引与参考CQI的索引可以相同也可以不同。
在一种可能的设计中，信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
在一种可能的设计中，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
在本申请实施例中，终端设备和网络设备预存有至少记录了CQI的索引和信道质量信息的映射关系的映射表。而CQI的索引是对信道质量量化后的序号，因此每一个CQI的索引可以反映出信道质量的好坏。终端设备首先衡量信道质量的好坏，并从预存的映射表中选取反映当前信道质量的CQI的索引，并反馈给网络设备。这样，网络设备结合终端设备反馈的参考CQI的索引，并结合当前网络资源情况，决定发送下行数据时的信道质量信息，并将最终选择的目标CQI的索引返回至终端设备。后续，网络设备可以使用和目标CQI的索引对应的信道质量信息向终端设备发送数据，从而可以提高数据传输的可靠性。
另外，终端设备测量信道质量好坏的过程可以通过现有技术实现，这里不作详述。
第二方面，本申请提供一种通知信道质量的方法，所述方法包括：所述终端设备从所述网络设备接收指示信息，所述指示信息用于指示目标CQI的索引；
所述终端设备根据所述目标CQI的索引，从所述映射表中确定所述目标CQI对应的信道质量信息。
所述终端设备根据所述目标CQI的索引，从所述映射表中确定所述目标CQI对应的信道质量信息。
在一种可能的设计中，信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
在一种可能的设计中，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
所述终端设备根据接收的目标CQI的索引对应的信道质量信息发送上行数据。
第三方面，本申请提供一种通知信道质量的方法，包括：
网络设备确定与终端设备之间通信需要采用的信道质量信息；
所述网络设备根据所述确定的信道质量信息，从预存的映射表中选取目标CQI的索引，所述映射表包括CQI的索引和信道质量信息之间的映射关系；
所述网络设备发送指示信息，所述指示信息用于指示所述目标CQI的索引。
在一种可能的设计中，所述信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
在一种可能的设计中，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
结合第三方面，在第三方面的某些实现方式中，所述信道质量信息用于上行发送数据或者下行发送数据。
在一种可能的设计中，当所述信道质量信息用于下行时，所述目标CQI的索引是网络设备基于参考CQI的索引确定的。
在一种可能的设计中，目标CQI的索引与参考CQI的索引可以相同也可以不同。
在一种可能的设计中，网络设备从终端设备接收用于指示参考CQI的索引的指示信息。
进一步地，以上第一方面、第二方面和第三方面的方法中，设计的多个映射表，可以应用于不同的可靠性需求。为不同块差错率BLER需求的多个场景都提供了一种简单、可行的方案。
第四方面，本申请提供一种通知信道质量的的装置，该装置具有实现上述第一方面及其第一方面任意一种可能的实现方式中的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第五方面，本申请提供一种通知信道质量的装置，该装置具有实现上述第二方面及其第二方面任意一种可能的实现方式中的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第六方面，本申请提供一种通知信道质量的装置，该装置具有实现上述第三方面及其第三方面任意一种可能的实现方式中的方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第七方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计 算机指令，当计算机指令在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意可能的实现方式中的方法。
第八方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当计算机指令在计算机上运行时，使得计算机执行上述第二方面或第二方面的任意可能的实现方式中的方法。
第九方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当计算机指令在计算机上运行时，使得计算机执行上述第三方面或第三方面的任意可能的实现方式中的方法。
第十方面，本申请提供一种芯片(或者，芯片系统)，包括存储器和处理器，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片的通信设备执行上述第一方面及其任意一种可能的实现方式中的方法。
第十一方面，本申请提供一种芯片(或者，芯片系统)，包括存储器和处理器，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片的通信设备执行上述第二方面及其任意一种可能的实现方式中的方法。
第十二方面，本申请提供一种芯片(或者，芯片系统)，包括存储器和处理器，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片的通信设备执行上述第三方面及其任意一种可能的实现方式中的方法。
第十三方面，本申请提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行上述第一方面及其任意一种可能的实现方式中的方法。
第十四方面，本申请提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行上述第二方面及其任意一种可能的实现方式中的方法。
第十五方面，本申请提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行上述第三方面及其任意一种可能的实现方式中的方法。
附图说明
图1为适用于本申请实施例的无线通信系统100。
图2是本申请实施例的通知信道质量的方法200的示意性交互图。
图3是本申请实施例的部分码率对应的BLER性能图。
图4是本申请实施例的通知信道质量的装置300的示意框图。
图5是本申请实施例的终端设备400的示意性结构图。
图6是本申请实施例的通知信道质量的装置500的示意框图。
图7是本申请实施例的网络设备600的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1为适用于本申请实施例的无线通信系统100。该无线通信系统中可以包括至少一个网络设备101，该网络设备与一个或多个终端设备(例如，图1中所示的终端设备102 和终端设备103)进行通信。网络设备可以是基站，也可以是基站与基站控制器集成后的设备，还可以是具有类似通信功能的其它设备。
其中，终端是一种具有通信功能的设备，可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备等。所述终端可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。在不同的网络中终端可以叫做不同的名称，例如：用户设备，移动台，用户单元，站台，蜂窝电话，个人数字助理，无线调制解调器，无线通信设备，手持设备，膝上型电脑，无绳电话，无线本地环路台等。为描述方便，本申请中简称为终端。
其中，基站(base station，BS)，也可称为基站设备，是一种部署在无线接入网用以提供无线通信功能的设备。在不同的无线接入系统中基站的叫法可能有所不同，例如在通用移动通讯系统(Universal Mobile Telecommunications System，UMTS)网络中基站称为节点B(NodeB),而在LTE网络中的基站称为演进的节点B(evolved NodeB，eNB或者eNodeB)，在新空口(new radio，NR)网络中的基站称为收发点(transmission reception point，TRP)或者下一代节点B(generation nodeB，gNB)，在终端对终端(device-to-device，D2D)或机器对机器(machine-to-machine，M2M)通信中承担基站功能的设备，或者在其他多种技术融合的网络中，或者在其他各种演进网络中的基站也可能采用其他叫法。本发明并不限于此。
本申请实施例提及的无线通信系统包括但不限于：下一代5G移动通信系统的三大应用场景，即增强移动带宽(Enhance Mobile Broadband，eMBB)，高可靠性低延迟通信(Ultra Reliable Low Latency Communication，URLLC)和增强海量机器连接通信(Massive Machine Type Communication，eMTC)或者将来出现的新的通信系统。
为了便于理解，首先对本申请涉及的相关概念作简单介绍。
5G作为下一代无线通信几乎是，在3GPP和其它各种国际标准化组织得到广泛的重视和研究。信道编码技术是通信技术领域一种常用的提高数据传输可靠性的方法。5G中提出数据信道将采用低密度奇偶检验码(Low Density Parity Check，LDPC)编码，控制信道将采用极化Polar编码。不失一般性，本申请以LDPC码作为信道编码为例说明。
LDPC是一类具有稀疏校验矩阵的线性分组码，即是说LDPC码的校验矩阵中零元素远远多于非零元素，且非零元素的分布没有规律。其中，一个码长等于N，信息序列的长度等于K的线性分组码可以由其校验矩阵唯一确定。LDPC码不仅具有逼近香农极限的良好性能，而且译码复杂度较低，结构灵活，是近年来信道编码领域研究的热点，目前已经广泛应用于深空通信、光纤通信、卫星数字视频和音频广播等领域。准循环低密度奇偶检验码(Quasi-Cyclic Low Density Parity Check，QC-LDPC)是LDPC的一个子类。QC-LDPC的校验矩阵(parity check matrix)是对一个基矩阵进行扩展得到的，QC-LDPC的校验矩阵具有描述简单、易于构造等特点。在3GPP TS38.212.V15.0.0(2017-12)中，引入了 LDPC的两种不同的基矩阵(base graph，BG)BG1和BG2进行LDPC编码，具体可以参见文献3GPP TS38.212.V15.0.0(2017-12)。
本申请实施例的技术方案适用于通过终端设备向网络设备上报信道质量指示CQI，以提高数据传输可靠性的场景。下文以5G中新空口(new radio，NR)技术中的URLLC场景作为示例，对本申请实施例的通知信道质量的方法的过程作介绍。
参见图2，图2是本申请实施例的通知信道质量的方法200的示意性交互图。应理解，步骤210至260仅是为了说明通知信道质量的方法200的过程，不应对方法200构成限定。这些步骤也可以拆分为更多的步骤，或者合并为更少的步骤。
210、终端设备获取信道质量信息，并根据获取的信道质量信息从预存的映射表中选取参考CQI的索引。所述信道质量信息可以包括调制阶数、码率或频谱效率中的至少一个。终端设备获取的信道质量信息可以反映当前信道质量的好坏。信道质量的好坏可以量化为信道质量指示(Channel Quality Indicator，CQI)的索引来表征。
本文中所说的映射表也可以称作CQI的索引表或者调制编码方案(modulation and coding scheme,MCS)表。其中，映射表包括CQI的索引和信道质量信息之间的映射关系，例如，包括CQI的索引和调制阶数、码率或频谱效率中至少一个的映射关系。
调制阶数决定了1个符号中传输的比特数。例如，正交相移键控(Quadrature Phase Shift Keying，QPSK)对应的调制阶数为2，16QAM(正交振幅调制，Quadrature Amplitude Modulation)的调制阶数为4，而64QAM的调制阶数为6。
码率为传输块中信息比特数与物理信道的总比特数之间的比值。
频谱效率表示一个资源单元(resource element,RE)所能承载的信息比特。
可以理解的是，网络设备在发送下行数据之前，并不清楚数据信道的条件如何，为了提高数据传输的可靠性，可以由终端设备衡量信道质量的好坏，并反馈至网络设备。通信协议将信道质量量化为0-15的序列，并定义为CQI。每个CQI对应一个索引(下文称作CQI的索引)。鉴于终端设备反馈给网络设备的CQI仅是作为一个参考，因此，本文中将终端设备反馈给网络设备的CQI的索引称作参考CQI的索引。
220、终端设备向网络设备发送第一指示信息，网络设备从终端设备接收第一指示信息。其中，第一指示信息用于指示参考CQI的索引。
本文对第一指示信息的形式不作限定，本领域技术人员容易想到多种可行的方式由终端设备向网络设备上报参考CQI的索引。例如，终端设备可以通过4比特向网络设备指示参考CQI的索引，代表最多16种可能。当然，此处的4比特只是一种举例，如果CQI的种类越少的话所需的比特数也就越少，如果CQI的种类越多的话所需的比特数也就越多。
230、网络设备确定发送数据实际需要采用的信道质量信息，例如调制阶数、码率或频谱效率。
在步骤230中，网络设备可以根据网络资源情况确定发送数据实际需要采用的信道质量信息，例如调制阶数、码率或频谱效率。或者，也可以结合终端设备上报的参考CQI的索引，从映射表中确定参考CQI对应的信道质量信息，例如调制阶数、码率或频谱效率，这样也可以获知当前信道质量，进而确定发送数据实际需要采用的信道质量信息，例如调制阶数、码率或频谱效率。
240、网络设备根据发送数据实际需要采用的信道质量信息，例如调制阶数、码率或频谱效率，从预存的映射表中选取目标CQI的索引。实际采用的目标CQI的索引与参考 CQI的索引可以相同也可以不同。
同样地，映射表包括CQI的索引和信道质量信息的映射关系。不难理解，网络设备与终端设备采用的CQI映射表是一致的。
250、网络设备向终端设备发送第二指示信息，终端设备从网络设备接收第二指示信息。
其中，第二指示信息指示目标CQI的索引。
260、终端设备根据目标CQI的索引，从映射表中确定与目标CQI的索引对应的信道质量信息，例如，确定调制阶数、码率和频谱效率中的至少一种。后续终端设备并根据确定的调制阶数和码率对于收到的数据进行处理。
可以理解的是，目标CQI可以与参考CQI相同或者不同。网络设备可以根据当前网络资源情况，确定发送数据实际需要采用的信道质量信息，例如调制阶数、码率或频谱效率，从而从映射表中选取与实际需要采用的调制阶数、码率或频谱效率对应的目标CQI的索引。或者，网络设备也可以结合当前网络资源情况和参考CQI的索引，选取目标CQI的索引。最终，网络设备将选取的目标CQI的索引通过第二指示信息通知终端设备。通过本申请实施例的方法，使得网络设备在发送数据之前，参考了当前信道质量的好坏，因此，可以提高数据传输的可靠性。
事实上，当该映射表应用于上行数据发送的时候，原则是类似的，只是不再需要由终端设备反馈参考CQI的索引，网络设备可以直接根据上行的信道确定上行所采用的调制阶数、码率和频谱效率中的至少一种，并根据映射表确定发送上行数据所需的目标CQI的索引，并将该索引通过指示信息发送给终端设备。终端设备可以根据收到的目标CQI的索引以及映射表确定收到的目标CQI的索引对应的调制阶数和码率，并根据确定的调制阶数和码率对于待发送的上行数据进行处理。
下面对本申请设计的映射表作详细介绍。下文给出的映射表中采用的编码方式为LDPC BG2，但设计原则同样适用于其他形式的信道编码。
根据最新的进展，URLLC场景的目标误块率(block error rate，BLER)根据不同的应用场景分别为10 -1(即1e-1)或10 -5(即1e-5)，目标BLER为1e-1的CQI映射表重用现有的eMBB场景中所使用的表格，这里不再赘述，本申请仅针对目标BLER为1e-5的场景为例来设计CQI映射表。根据常规的信噪比(signal-to-noise ratio，SNR)需求或者信干噪比(signal-to-interference-noise ratio，SINR)范围(不失一般性，以下均以SNR为例)需求。根据信道编码的特点，一般还会规定最小码率和最大码率。一般的方法为，通过系统仿真获得可以支撑小区给定覆盖需求的SNR，再根据该SNR需求，我们找到目标BLER对应的最大频谱效率为772/1024*6，最小频谱效率在30/1024*2～50/1024*2之间，典型的4种可能值为30/1024*2，36/1024*2，40/1024*2，50/1024*2，这些表达式的形式为SE＝CR/1024*M，其中SE表示频谱效率，CR为码率，M为调制阶数。需要说明的是，本文中提到的码率不是实际码率，实际码率应是表中的’码率’的取值除以1024。这也是业界常用的表示方法。这4个不同频谱效率的具体仿真结果参见图3。通过给定的最大频谱效率和最小频谱效率，可以通过仿真的方法进行CQI映射表设计。因目标BLER为1e-1的CQI映射表已经确定，为简化系统实现复杂度，还可以对根据仿真结果设计的目标BLER为1e-5的CQI映射表表项进行一定范围内的调整，使其在不影响系统性能的前提下尽量重用目标BLER为1e-1的CQI映射表的表项。表格中的“索引”即为CQI的索引。
通过仿真，可以知道下面这些表格中的取值能得到较好的性能，因此为较优的值。
1、最小频谱效率为36/1024*2
表1
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0703 36 2
2 0.1465 75 2
3 0.252 129 2
4 0.4023 206 2
5 0.6055 310 2
6 0.873 447 2
7 1.1758 602 2
8 1.4063 360 4
9 1.8633 477 4
10 2.3242 595 4
11 2.5488 435 6
12 3.0879 527 6
13 3.6797 628 6
14 4.1719 712 6
15 4.5234 772 6
这里以表1为例给出一个根据频谱效率、码率或调制阶数选取CQI的索引的例子，本文中所有表格都适用这个原则的。例如，根据信道质量或者其他计算方法得到SE＝0.17，则从表1中选取小于或等于0.17，且与0.17最接近的SE的取值对应的CQI的索引，即对应的CQI的索引为2。又例如，根据信道质量或者其他计算方法得到码率为60，则从表1中选取小于或等于60，且与60最接近的码率的取值对应的CQI的索引，即对应的CQI的索引为1。在本申请实施例中，终端设备选取参考CQI的索引，或者网络设备选取目标CQI的索引都遵循这个原则。终端接收到目标CQI的索引时，可以根据该索引从表1读取相应的频谱效率、码率或调制阶数用于下行数据接收或者上行数据发送，同样地，本文所有表格都适用这个原则。
对表1进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表1中表项对应码率与LTE中的CQI映射表表项对应码率差别在-5/1024到+5/1024之间时，则重用该LTE中的CQI映射表表项，得到的CQI映射表如下：
表2
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0703 36 2
2 0.1523 78 2
3 0.252 129 2
4 0.4023 206 2
5 0.6016 308 2
6 0.877 449 2
7 1.1758 602 2
8 1.4063 360 4
9 1.8633 477 4
10 2.3242 595 4
11 2.5488 435 6
12 3.0879 527 6
13 3.6797 628 6
14 4.1719 712 6
15 4.5234 772 6
对表1进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表1中表项对应码率与LTE CQI映射表表项对应码率差别在-10/1024到+10/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表3
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0703 36 2
2 0.1523 78 2
3 0.2344 120 2
4 0.4023 206 2
5 0.6016 308 2
6 0.877 449 2
7 1.1758 602 2
8 1.4063 360 4
9 1.8633 477 4
10 2.3242 595 4
11 2.5488 435 6
12 3.0879 527 6
13 3.6797 628 6
14 4.1719 712 6
15 4.5234 772 6
对表1进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表1中表项对应码率与LTE CQI映射表表项对应码率差别在-20/1024到+20/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表4
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0703 36 2
2 0.1523 78 2
3 0.2344 120 2
4 0.377 193 2
5 0.6016 308 2
6 0.877 449 2
7 1.1758 602 2
8 1.4766 378 4
9 1.9141 490 4
10 2.3242 595 4
11 2.5488 435 6
12 3.0879 527 6
13 3.6797 628 6
14 4.1719 712 6
15 4.5234 772 6
2、最小频谱效率为30/1024*2
表5
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0586 30 2
2 0.1289 66 2
3 0.2305 118 2
4 0.375 192 2
5 0.5723 293 2
6 0.834 427 2
7 1.1387 583 2
8 1.3594 348 4
9 1.8203 466 4
10 2.2891 586 4
11 2.5137 429 6
12 3.0645 523 6
13 3.6621 625 6
14 4.166 711 6
15 4.5234 772 6
对表5进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表5中表项对应码率与LTE CQI映射表表项对应码率差别在-5/1024到+5/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表6
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0586 30 2
2 0.1289 66 2
3 0.2344 120 2
4 0.377 193 2
5 0.5723 293 2
6 0.834 427 2
7 1.1387 583 2
8 1.3594 348 4
9 1.8203 466 4
10 2.2891 586 4
11 2.5137 429 6
12 3.0645 523 6
13 3.6621 625 6
14 4.166 711 6
15 4.5234 772 6
对表5进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表5中表项对应码率与LTE CQI映射表表项对应码率差别在-10/1024到+10/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表7
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0586 30 2
2 0.1289 66 2
3 0.2344 120 2
4 0.377 193 2
5 0.5723 293 2
6 0.834 427 2
7 1.1387 583 2
8 1.3594 348 4
9 1.8203 466 4
10 2.2891 586 4
11 2.5137 429 6
12 3.0645 523 6
13 3.6621 625 6
14 4.166 711 6
15 4.5234 772 6
对表5进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表5中表项对应码率与LTE CQI映射表表项对应码率差别在-20/1024到+20/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表8
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0586 30 2
2 0.1523 78 2
3 0.2344 120 2
4 0.377 193 2
5 0.6016 308 2
6 0.834 427 2
7 1.1758 602 2
8 1.3594 348 4
9 1.8203 466 4
10 2.2891 586 4
11 2.5137 429 6
12 3.0645 523 6
13 3.6621 625 6
14 4.166 711 6
15 4.5234 772 6
3、最小频谱效率为40/1024*2
表9
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0781 40 2
2 0.1563 80 2
3 0.2656 136 2
4 0.4199 215 2
5 0.627 321 2
6 0.8965 459 2
7 1.1973 613 2
8 1.4336 367 4
9 1.8867 483 4
10 2.3438 600 4
11 2.5664 438 6
12 3.0996 529 6
13 3.6914 630 6
14 4.1719 712 6
15 4.5234 772 6
对表9进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表9中表项对应码率与LTE CQI映射表表项对应码率差别在-5/1024到+5/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表10
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0781 40 2
2 0.1523 78 2
3 0.2656 136 2
4 0.4199 215 2
5 0.627 321 2
6 0.8965 459 2
7 1.1973 613 2
8 1.4336 367 4
9 1.8867 483 4
10 2.3438 600 4
11 2.5664 438 6
12 3.0996 529 6
13 3.6914 630 6
14 4.1719 712 6
15 4.5234 772 6
对表9进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表9中表项对应码率与LTE CQI映射表表项对应码率差别在-10/1024到+10/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表11
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0781 40 2
2 0.1523 78 2
3 0.2656 136 2
4 0.4199 215 2
5 0.627 321 2
6 0.877 449 2
7 1.1973 613 2
8 1.4336 367 4
9 1.9141 490 4
10 2.3438 600 4
11 2.5664 438 6
12 3.0996 529 6
13 3.6914 630 6
14 4.1719 712 6
15 4.5234 772 6
对表9进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表9中表项对应码率与LTE CQI映射表表项对应码率差别在-20/1024到+20/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表12
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0781 40 2
2 0.1523 78 2
3 0.2344 120 2
4 0.4199 215 2
5 0.6016 308 2
6 0.877 449 2
7 1.1758 602 2
8 1.4766 378 4
9 1.9141 490 4
10 2.4063 616 4
11 2.5664 438 6
12 3.0996 529 6
13 3.6914 630 6
14 4.1719 712 6
15 4.5234 772 6
4、最小频谱效率为50/1024*2
表13
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0977 50 2
2 0.1816 93 2
3 0.2988 153 2
4 0.4609 236 2
5 0.6777 347 2
6 0.9512 487 2
7 1.2441 637 2
8 1.4922 382 4
9 1.9453 498 4
10 2.3906 612 4
11 2.6133 446 6
12 3.1348 535 6
13 3.7148 634 6
14 4.1777 713 6
15 4.5234 772 6
对表13进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表13中表项 对应码率与LTE CQI映射表表项对应码率差别在-5/1024到+5/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表14
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0977 50 2
2 0.1816 93 2
3 0.2988 153 2
4 0.4609 236 2
5 0.6777 347 2
6 0.9512 487 2
7 1.2441 637 2
8 1.4766 378 4
9 1.9453 498 4
10 2.4063 616 4
11 2.6133 446 6
12 3.1348 535 6
13 3.7148 634 6
14 4.1777 713 6
15 4.5234 772 6
对表13进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表13中表项对应码率与LTE CQI映射表表项对应码率差别在-10/1024到+10/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表15
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0977 50 2
2 0.1816 93 2
3 0.2988 153 2
4 0.4609 236 2
5 0.6777 347 2
6 0.9512 487 2
7 1.2441 637 2
8 1.4766 378 4
9 1.9141 490 4
10 2.4063 616 4
11 2.6133 446 6
12 3.1348 535 6
13 3.7148 634 6
14 4.1777 713 6
15 4.5234 772 6
对表13进行调整，使其表项最大程度重用LTE CQI映射表表项。例如，表13中表项对应码率与LTE CQI映射表表项对应码率差别在-20/1024到+20/1024之间时，则重用该LTE CQI映射表表项，得到的CQI映射表如下：
表16
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0977 50 2
2 0.1523 78 2
3 0.2988 153 2
4 0.4609 236 2
5 0.6777 347 2
6 0.9512 487 2
7 1.2441 637 2
8 1.4766 378 4
9 1.9141 490 4
10 2.4063 616 4
11 2.7305 466 6
12 3.1348 535 6
13 3.7148 634 6
14 4.1777 713 6
15 4.5234 772 6
5、其他最小效率情况
考虑到方案的完整性，为满足不同的小区覆盖需求，CQI映射表最小效率表项还可能在31/1024*2～39/1024*2之间，当最小效率为31/1024*2,32/1024*2,33/1024*2,34/1024*2,35/1024*2,37/1024*2,38/1024*2或39/1024*2时，对应的CQI映射表如下。
表17
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0605 31 2
2 0.1309 67 2
3 0.2344 120 2
4 0.3789 194 2
5 0.5762 295 2
6 0.8398 430 2
7 1.1445 586 2
8 1.3672 350 4
9 1.8281 468 4
10 2.2969 588 4
11 2.5195 430 6
12 3.0645 523 6
13 3.668 626 6
14 4.166 711 6
15 4.5234 772 6
表18
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0625 32 2
2 0.1348 69 2
3 0.2383 122 2
4 0.3848 197 2
5 0.584 299 2
6 0.8477 434 2
7 1.1523 590 2
8 1.375 352 4
9 1.8359 470 4
10 2.3008 589 4
11 2.5254 431 6
12 3.0703 524 6
13 3.668 626 6
14 4.166 711 6
15 4.5234 772 6
表19
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0645 33 2
2 0.1367 70 2
3 0.2422 124 2
4 0.3887 199 2
5 0.5898 302 2
6 0.8535 437 2
7 1.1582 593 2
8 1.3828 354 4
9 1.8438 472 4
10 2.3086 591 4
11 2.5313 432 6
12 3.0762 525 6
13 3.6738 627 6
14 4.166 711 6
15 4.5234 772 6
表20
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0664 34 2
2 0.1406 72 2
3 0.2441 125 2
4 0.3926 201 2
5 0.5938 304 2
6 0.8594 440 2
7 1.1641 596 2
8 1.3906 356 4
9 1.8477 473 4
10 2.3125 592 4
11 2.5371 433 6
12 3.0762 525 6
13 3.6738 627 6
14 4.166 711 6
15 4.5234 772 6
表21
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0684 35 2
2 0.1426 73 2
3 0.248 127 2
4 0.3984 204 2
5 0.5996 307 2
6 0.8652 443 2
7 1.1699 599 2
8 1.3984 358 4
9 1.8555 475 4
10 2.3203 594 4
11 2.543 434 6
12 3.082 526 6
13 3.6797 628 6
14 4.166 711 6
15 4.5234 772 6
表22
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0723 37 2
2 0.1484 76 2
3 0.2559 131 2
4 0.4063 208 2
5 0.6113 313 2
6 0.8789 450 2
7 1.1797 604 2
8 1.4102 361 4
9 1.8672 478 4
10 2.3281 596 4
11 2.5547 436 6
12 3.0879 527 6
13 3.6855 629 6
14 4.1719 712 6
15 4.5234 772 6
表23
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0742 38 2
2 0.1504 77 2
3 0.2598 133 2
4 0.4102 210 2
5 0.6152 315 2
6 0.8848 453 2
7 1.1855 607 2
8 1.418 363 4
9 1.875 480 4
10 2.332 597 4
11 2.5605 437 6
12 3.0938 528 6
13 3.6855 629 6
14 4.1719 712 6
15 4.5234 772 6
表24
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0762 39 2
2 0.1523 78 2
3 0.2617 134 2
4 0.4141 212 2
5 0.6211 318 2
6 0.8887 455 2
7 1.1914 610 2
8 1.4258 365 4
9 1.8789 481 4
10 2.3398 599 4
11 2.5605 437 6
12 3.0938 528 6
13 3.6855 629 6
14 4.1719 712 6
15 4.5234 772 6
6、最大化重用eMBB中的CQI映射表(即目标BLER为1e-1的CQI映射表)方案除上述方法外，还可以考虑结合仿真并最大化重用目标BLER为1e-1的CQI映射表的表项。这种方案的思路是：删除目标BLER为1e-1的CQI映射表中频谱效率最高的两项(即873/1024*6和948/1024*6对应的表项)后重用到所需的CQI映射表中，再添加一或两项频谱效率小于78/1024*2的表项。
例如，当添加两项频谱效率小于78/1024*2的表项时，可能的CQI映射表可以是下述表25至表36中的任意一个，注意这些表格中索引3-15对应的频谱效率、码率和调制阶数都一致，即都是重用了eMBB中的CQI映射表表项。其中，索引1可以采用上述表1至表24中的设计方法中选定的最小码率，然后再通过仿真结果找到该最小码率与78之间的一个码率值(或频谱效率)对应索引2。
只添加一项频谱效率小于78/1024*2的表项时，该添加项对应的频谱效率值可以为30/1024*2～50/1024*2中任意一个数或者满足要求的任一小于78/1024*2的频谱效率值。这时候除了索引0外，所需的CQI映射表中还会再空出一个索引作为预留值，不失一般性，假设索引1预留，而索引3-15重用表25至表36中的索引3-15，这时，所需的CQI映射表中索引2对应的表项可以是上述表1-24中任一表格中频谱效率小于78/1024*2对应的表项，例如可以是表1至表24中任一个索引1对应的表项。在此不一一列举。
表25
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0586 30 2
2 0.0996 51 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表26
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0605 31 2
2 0.1016 52 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表27
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0625 32 2
2 0.1035 53 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表28
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0645 33 2
2 0.1035 53 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表29
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0664 34 2
2 0.1055 54 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表30
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0684 35 2
2 0.1055 54 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 446 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表31
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0703 36 2
2 0.1074 55 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表32
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0723 37 2
2 0.1094 56 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表33
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0742 38 2
2 0.1094 56 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表34
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0762 39 2
2 0.1113 57 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表35
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0781 40 2
2 0.1133 58 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
表36
索引 频谱效率 码率 调制阶数
0 - - -
1 0.0977 50 2
2 0.123 63 2
3 0.1523 78 2
4 0.2344 120 2
5 0.377 193 2
6 0.6016 308 2
7 0.877 449 2
8 1.1758 602 2
9 1.4766 378 4
10 1.9141 490 4
11 2.4063 616 4
12 2.7305 466 6
13 3.3223 567 6
14 3.9023 666 6
15 4.5234 772 6
为了方便描述，上述表1至表36中包括了CQI的索引与频谱效率、码率和调制阶数之间的映射关系，但是在实际应用中表1至表36中也可以只包括CQI的索引与频谱效率、码率和调制阶数中的至少一个之间的映射关系，或者索引号的排列方式有所不同。
当CQI的索引小于16个时，实际使用的映射表可以是上述表1至表36中任意一个表的一部分。当CQI的索引大于16个时，上述表1至表36中任意一个表的任一部分可以是实际使用的映射表的一部分。当然，CQI的索引号也有可能发生相应的变化。
任意CQI的索引、频谱效率、码率或效率之间的映射关系可以满足以上某一个表中所示的全部映射关系，或者也可以仅满足某一个表的部分映射关系。例如，第1列的CQI的索引与映射表其它列之间的参数之间可以仅满足某一行或某几行所示的映射关系，也可以满足整个表中每一行所示的映射关系。又例如，从以上某个表的某一行来看，CQI的索引可以仅与这一行中的某一列或某几列之间满足表中所示的映射关系。本申请实施例不作限定。
以上对本申请实施例的通知信道质量的方法作了详细介绍。采用本申请实施例提供的 通知信道质量的方法，可以提高数据传输的可靠性。
进一步地，本申请实施例的多个映射表(或称作CQI映射表)，可以满足不同的可靠性需求。例如，可以应用于NR的URLLC的不同场景。
下面结合图4至图7介绍本申请实施例的通知信道质量的装置。
图4是本申请实施例的通知信道质量的装置300的示意性框图。装置300主要包括处理单元310和收发单元320。
处理单元310用于获取信道质量信息，例如调制阶数、码率和/或频谱效率，并根据获取的信道质量信息，从预存的映射表(例如上述的表1至表36)中选取参考CQI的索引，映射表包括CQI的索引和信道质量信息的映射关系；
收发单元320用于向网络设备发送第一指示信息，第一指示信息用于指示参考CQI的索引；
收发单元320还用于从网络设备接收第二指示信息，第二指示信息用于指示目标信道质量指示CQI的索引；
处理单元310还用于根据目标CQI的索引，从映射表中确定目标CQI对应的信道质量信息，即调制阶数、码率和/或频谱效率中的至少一种。
装置300既适用于上行发送也适用于下行接收。
本申请实施例的装置300中的各单元和上述其它操作或功能分别为了实现本申请实施例中由终端设备执行的相应操作和/或相应流程。为了简洁，此处不再赘述。
图5为本申请实施例的终端设备400的示意性结构图。如图5所示，终端设备400包括：一个或多个处理器401，一个或多个存储器402和一个或多个收发器403。处理器401用于控制收发器403收发信号，存储器402用于存储计算机程序，处理器401用于从存储器402中调用并运行该计算机程序，使得终端设备400执行本申请实施例中由终端设备执行的相应流程和/或操作。存储器402和收发器403既可以通过总线或者接口耦合，也可以集成在一起，此处不再赘述。
需要说明的是，图4中所示的装置300可以通过图5中所示的终端设备400实现。例如，处理单元310可以由处理器401实现，收发单元320可以由收发器403实现等。
此外，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当该计算机指令在计算机上运行时，使得计算机执行通知信道质量的方法中由终端设备执行的相应操作和/或流程。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机执行通知信道质量的方法中由终端设备执行的相应操作和/或流程。
本申请还提供一种芯片(或者，芯片系统)，包括存储器和处理器，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片的通信设备执行通知信道质量的方法中由终端设备执行的相应操作和/或流程，存储器和收发器既可以通过总线耦合，也可以集成在一起，。
这里所说的通信设备可以为终端设备。
图6是本申请实施例的通知信道质量的装置500的示意性框图。装置500主要包括处理单元510和收发单元520。
处理单元510，用于确定发送数据需要采用的信道质量信息，例如调制阶数、码率或 频谱效率，并根据确定的信道质量信息，从预存的映射表中选取目标CQI的索引，所述映射表包括CQI的索引和信道质量信息的映射关系，其中信道质量信息包括但不限于调制阶数、码率或频谱效率中的至少一种；
收发单元520，用于向终端设备发送第二指示信息，第二指示信息用于指示目标CQI的索引。
本申请实施例的装置500中的各单元和上述其它操作或功能分别为了实现本申请实施例中由网络设备执行的相应操作和/或流程。为了简洁，此处不再赘述。
可选地，装置500可以是芯片或者集成电路。
图7为本申请实施例的网络设备600的示意性结构图。如图7所示，网络设备600包括：一个或多个处理器601，一个或多个存储器602和一个或多个收发器603。处理器601用于控制收发器603收发信号，存储器602用于存储计算机程序，处理器601用于从存储器602中调用并运行该计算机程序，使得网络设备600执行本申请实施例中由网络设备执行的相应流程和/或操作。存储器602和收发器603既可以通过总线或者接口耦合，也可以集成在一起，此处不再赘述。
需要说明的是，图6中所示的装置500可以通过图7中所示的终端设备600实现。例如，处理单元510可以由处理器601实现。收发单元520可以由收发器603实现。
此外，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有计算机指令，当该计算机指令在计算机上运行时，使得计算机执行通知信道质量的方法中由网络设备执行的相应操作和/或流程。
本申请还提供一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码在计算机上运行时，使得计算机通知信道质量的方法中由网络设备执行的相应操作和/或流程。
本申请还提供一种芯片(或者，芯片系统)，包括存储器和处理器，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片的通信设备通知信道质量的方法中由网络设备执行的相应操作和/或流程，存储器和收发器既可以通过总线耦合，也可以集成在一起，。
以上实施例中，处理器可以为中央处理器(Central Processing Unit，CPU)、通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件、微处理器或一个或多个用于控制本申请方案程序执行的集成电路等。例如，处理器可以包括数字信号处理器设备、微处理器设备、模数转换器、数模转换器等。处理器可以根据这些设备各自的功能而在这些设备之间分配移动设备的控制和信号处理的功能。此外，处理器可以包括操作一个或多个软件程序的功能，软件程序可以存储在存储器中。处理器的所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
存储器可以是只读存储器(Read-Only Memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(Random Access Memory，RAM)或者可存储信息和指令的其他类型的动态存储设备。也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、只读光盘(Compact Disc Read-Only  Memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种通知信道质量的方法，其特征在于，所述方法包括：
    终端设备获取信道质量信息；
    所述终端设备根据获取的信道质量信息，从预存的映射表中选取参考信道质量指示CQI的索引，所述映射表包括CQI的索引和信道质量信息之间的映射关系；
    所述终端设备发送第一指示信息，所述第一指示信息用于指示所述参考CQI的索引；
    所述终端设备从所述网络设备接收第二指示信息，所述第二指示信息用于指示目标CQI的索引；
    所述终端设备根据所述目标CQI的索引，从所述映射表中确定所述目标CQI对应的信道质量信息。
  2. 根据权利要求1所述的方法，其特征在于，所述信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
  3. 根据权利要求1或2所述的方法，其特征在于，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述第一指示信息与所述第二指示信息相同或者不同。
  5. 一种通知信道质量的方法，其特征在于，包括：
    网络设备确定与终端设备之间通信需要采用的信道质量信息；
    所述网络设备根据所述确定的信道质量信息，从预存的映射表中选取目标CQI的索引，所述映射表包括CQI的索引和信道质量信息之间的映射关系；
    所述网络设备发送指示信息，所述指示信息用于指示所述目标CQI的索引。
  6. 根据权利要求5所述的方法，其特征在于，所述信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
  7. 根据权利要求5或6所述的方法，其特征在于，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
  8. 一种通知信道质量的装置，其特征在于，包括：
    处理单元，用于获取信道质量信息，并根据所述获取的信道质量信息从预存的映射表中选取参考信道质量指示CQI的索引，所述映射表包括CQI的索引和信道质量信息的映射关系；
    收发单元，用于向网络设备发送第一指示信息，所述第一指示信息用于指示所述参考CQI的索引；
    所述收发单元，还用于从所述网络设备接收第二指示信息，所述第二指示信息用于指示目标信道质量指示CQI的索引；
    所述处理单元，还用于根据所述目标CQI的索引从所述映射表中确定所述目标CQI对应的信道质量信息。
  9. 根据权利要求8所述的装置，其特征在于，所述信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
  10. 根据权利要求8或9所述的装置，其特征在于，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
  11. 根据权利要求8-10中任一项所述的装置，其特征在于，所述第一指示信息与所述第二指示信息相同或者不同。
  12. 一种通知信道质量的装置，其特征在于，包括：
    处理单元，用于确定与终端设备之间通信需要采用的信道质量信息，并根据所述确定的信道质量信息，从预存的映射表中选取目标CQI的索引，所述映射表包括CQI的索引和信道质量信息的映射关系；
    收发单元，用于发送指示信息，所述指示信息用于指示目标CQI的索引。
  13. 根据权利要求12所述的装置，其特征在于，所述信道质量信息包括调制阶数、码率或频谱效率中的至少一个。
  14. 根据权利要求12或13所述的装置，其特征在于，所述映射表中任意一个CQI的索引和信道质量信息之间的映射关系包含在表1至表36中的任意一个表格中。
  15. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机指令，当所述计算机指令在终端设备上运行时，使得所述终端设备执行如权利要求1至4中任一项所述的方法。
  16. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机指令，当所述计算机指令在网络设备上运行时，使得网络设备执行如权利要求5至7中任一项所述的方法。
  17. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在终端设备上运行时，使得终端设备执行如权利要求1至4中任一项所述的方法。
  18. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码在网络设备上运行时，使得网络设备执行如权利要求5至7中任一项所述的方法。
  19. 一种通知信道质量的装置，其特征在于，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的终端设备执行如权利要求1至4中任一项所述的方法。
  20. 一种通知信道质量的装置，其特征在于，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得安装有所述芯片的网络设备执行如权利要求5至7中任一项所述的方法。
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