WO2019114690A1 - Precoding method and apparatus in multi-antenna system - Google Patents

Precoding method and apparatus in multi-antenna system Download PDF

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Publication number
WO2019114690A1
WO2019114690A1 PCT/CN2018/120261 CN2018120261W WO2019114690A1 WO 2019114690 A1 WO2019114690 A1 WO 2019114690A1 CN 2018120261 W CN2018120261 W CN 2018120261W WO 2019114690 A1 WO2019114690 A1 WO 2019114690A1
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Prior art keywords
precoding
information
quantization parameter
configuration set
parameter configuration
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PCT/CN2018/120261
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French (fr)
Chinese (zh)
Inventor
沈海华
葛士斌
李波杰
毕晓艳
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华为技术有限公司
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Publication of WO2019114690A1 publication Critical patent/WO2019114690A1/en

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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
    • H04B7/0413—MIMO systems
    • 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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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

Definitions

  • the present invention relates to communication technologies, and in particular, to a method and apparatus for precoding in a multiple-input and multiple-output (MIMO) antenna system.
  • MIMO multiple-input and multiple-output
  • 5G (English name: 5th generation mobile networks or 5th generation wireless systems, English abbreviation: 5G) will meet the diverse business needs of people in the fields of residence, work, leisure and transportation, even in dense residential areas, offices, stadiums, open air Scenes with ultra-high traffic density, ultra-high connection density, and ultra-high mobility, such as assembly, subway, expressway, high-speed rail and wide-area coverage, can also be provided for UE (English name: User Equipment, English abbreviation: UE) Extreme HD video, virtual reality, cloud desktop, online gaming and more. Therefore, 5G needs to provide more bandwidth, more connections, and lower latency than traditional LTE (Long Term Evolution, English abbreviation: LTE) networks.
  • LTE Long Term Evolution
  • large-scale multiple input and multiple output (English full name: massive multiple input and multiple output, mMIMO) antenna technology is considered to be One of the key technologies of 5G, it is the only wireless technology that can increase system capacity ten times or even 100 times. Compared to 4 or 8 antenna systems, large-scale multi-antenna technology can improve spectral efficiency and energy utilization efficiency through different dimensions (space, time domain, frequency domain, etc.).
  • the 4 or 8 antenna system generally adopts an open-loop or closed-loop codebook index to implement uplink MIMO (maximum 4 streams), and adopting open-loop to implement uplink MIMO transmission means that the transmitting end does not receive feedback channel state information to the receiving end.
  • the sender uses a selected codebook for precoding.
  • the closed-loop codebook indicates that the uplink MIMO is usually performed by the transmitting end to store multiple codebooks, and the receiving end estimates the channel according to the sounding reference signal (Sounding Reference Signal, English abbreviation: SRS) sent by the transmitting end, and according to The estimation result is that the UE selects a precoding codebook, and the selected precoding codebook is indicated to the transmitting end by signaling, and the transmitting end performs precoding processing according to the codebook that receives the indication.
  • Sounding Reference Signal Sounding Reference Signal, English abbreviation: SRS
  • the number of antennas on the base station side increases (such as 16, 32, 64, 256 or more antennas) and the number of upstream streams increases (such as 8, 12, 24, 36, 48 streams), if in some scenarios
  • the open loop or codebook indication mode is still used, which leads to inter-stream interference when the inter-stream correlation is relatively high, resulting in system performance degradation.
  • the embodiments of the present invention provide a method and an apparatus for precoding in a MIMO system, which solves the problem of lacking dynamic transmission of a precoding matrix in an air interface to accommodate channel changes and maintaining a small signaling overhead.
  • a first aspect provides a precoding method in a MIMO system, where a terminal receives precoding quantization result information sent by a network node, and determines a precoding matrix according to the received precoding quantization result information and precoding quantization parameter information, where the terminal according to the pre The coding matrix precodes the data stream.
  • the terminal can obtain the precoding matrix adapted to the channel change by receiving the precoding quantization result information and precoding the quantization parameter information, thereby reducing the signaling transmission overhead, and the precoding adapted to the channel variation can reduce the flow. Interference, increase system capacity.
  • the precoding quantization result information includes at least one of the following information: the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix. a maximum value index indicating a position where a maximum norm value of all elements of each vector of the precoding matrix is located; a quantized value length indication indicating a bit number of the quantized value; and an information length indicating the quantized value included The number of vectors of the precoding matrix and the number of elements of each vector, or the total byte length of the quantized value.
  • efficient transmission of pre-coded quantization result information can be achieved by transmission of one or more sets of information.
  • the precoding quantization result information is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel (PDCCH) Indicated in the physical downlink shared channel PDSCH.
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • PDCH physical downlink control channel
  • the transmission of the pre-coded quantization result information in the air interface can be implemented by using specific signaling.
  • the terminal before receiving the pre-coding quantized result information, the terminal further includes: acquiring pre-encoding quantization parameter information.
  • the terminal may obtain precoding quantization parameter information, so that the terminal may obtain the precoding matrix according to the obtained precoding quantization parameter information and the precoding quantization result information.
  • the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index.
  • a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
  • the precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of the quantized value, quantization method indication information, bandwidth indication information, a base vector Instructions.
  • the bit number information of the quantized value includes: bit number information that is greater than or equal to the quantized value of the quantization threshold, and bit number information that is smaller than the quantized value of the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, and bit number information smaller than or equal to the quantization value of the quantization threshold.
  • the base vector indication information includes a bit map and/or a base vector length indication indicating a base vector.
  • the precoding quantization parameter information is carried in a physical downlink control channel (PDCCH), or MAC layer control signaling (MAC CE), or radio resource control (RRC) signaling.
  • PDCH physical downlink control channel
  • MAC CE MAC layer control signaling
  • RRC radio resource control
  • the terminal acquires a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set; the terminal configures a set index and a precoding quantization parameter configuration set index according to the precoding quantization parameter.
  • the correspondence between the precoding quantization parameter configuration set and the precoding quantization parameter configuration set is obtained.
  • the configuration and modification of the precoding quantization parameter information may be performed by using a precoding quantization parameter configuration set index, which effectively reduces signaling overhead.
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is sent by the network node to the terminal, or is preset.
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is performed by the network node by using radio resource control (RRC) signaling, or MAC layer control signaling. (MAC CE) sent to the terminal.
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • a second aspect provides a precoding method in a MIMO system, where a network node sends precoding quantization result information to a terminal; the network node receives a data stream sent by the terminal, where the data stream uses precoding quantization result information and precoding quantization parameter information.
  • the obtained precoding matrix is encoded.
  • the network node dynamically configures a precoding matrix for the terminal according to the channel change, so that the terminal can quickly adapt to the channel change and obtain a real-time precoding matrix, thereby reducing inter-stream interference, improving system capacity, and adopting quantization.
  • the method transmits precoding quantization results to reduce signaling overhead.
  • the precoding quantization result information includes at least one of the following information: the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix. a maximum value index indicating a position where a maximum norm value of all elements of each column vector of the precoding matrix is located; a quantized value length indication indicating a bit number of the quantized value; and an information length indicating that the quantized value is included The number of vectors of the precoding matrix and the number of elements of each column vector, or the total byte length of the quantized value.
  • efficient transmission of pre-coded quantization result information can be achieved by transmission of one or more sets of information.
  • the precoding quantization result information is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel (PDCCH) Indicated in the physical downlink shared channel PDSCH.
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • PDCH physical downlink control channel
  • the transmission of the pre-coded quantization result information in the air interface can be implemented by using specific signaling.
  • the network node before the network node sends the precoding quantization result information to the terminal, the network node further includes: the network node sending the precoding quantization parameter information to the terminal.
  • the network may configure an optimized precoding quantization parameter information for the terminal according to the channel change condition, so as to improve the quantization precision, optimize the precoding of the terminal, reduce interference, improve system capacity, and reduce precoding.
  • the transmission overhead of the quantized result information is not limited to improve the quantization precision, optimize the precoding of the terminal, reduce interference, improve system capacity, and reduce precoding.
  • the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or precoding quantization parameter configuration set index information.
  • precoding quantization parameter information may be implemented, which may be a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
  • the precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of the quantized value, quantization method indication information, bandwidth indication information, a base vector Instructions.
  • the bit number information of the quantized value includes: bit number information that is greater than or equal to the quantized value of the quantization threshold, and bit number information that is smaller than the quantized value of the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, or bit number information smaller than or equal to the quantization value of the quantization threshold.
  • the base vector indication information includes a bit map string and/or a base vector length indication indicating the base vector.
  • the precoding quantization parameter information is carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling. in.
  • PDCCH Physical Downlink Control Channel
  • MAC CE MAC Layer Control Signaling
  • RRC Radio Resource Control
  • the network node sends, to the terminal, a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set.
  • the configuration and modification of the precoding quantization parameter information may be performed by using a precoding quantization parameter configuration set index, which effectively reduces signaling overhead.
  • the correspondence between the quantization mode index and the precoding quantization parameter configuration set is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE).
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • a terminal device which is used to implement the functions in the MIMO precoding method provided by the foregoing first aspect or any possible implementation manner of the first aspect, where the function is It can be implemented by hardware or by software.
  • the hardware or software includes one or more corresponding units of the above functions.
  • the structure of the terminal device includes a processor and a memory, where the code stores data and data, and the memory is coupled to the processor, and the processor is configured to support the terminal device to perform the first aspect described above. Or a data transmission method provided by any of the possible implementations of the first aspect.
  • the terminal device may further include a communication interface and a bus, and the communication interface is connected to the processor through the bus.
  • a network device configured to implement the functions in the MIMO precoding method provided by the foregoing second aspect or any possible implementation manner of the second aspect, where the function is It can be implemented by hardware or by software.
  • the hardware or software includes one or more corresponding units of the above functions.
  • a network device includes a processor and a memory, where the code stores data and data, and the memory is coupled to a processor, and the processor is configured to support the terminal device to perform the foregoing second aspect. Or a data transmission method provided by any of the possible implementations of the second aspect.
  • the terminal device may further include a communication interface and a bus, and the communication interface is connected to the processor through the bus.
  • a still further aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the first aspect or the first aspect described above
  • the MIMO precoding method provided by any one of the possible implementation manners, or the MIMO precoding method provided by any of the foregoing possible implementation manners of the second aspect or the second aspect.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the MIMO provided by any of the first aspect or any of the possible implementations of the first aspect A precoding method, or a MIMO precoding method provided by any of the above possible implementations of the second aspect or the second aspect.
  • a communication system comprising a plurality of devices, the plurality of devices comprising: a network device and at least one terminal device.
  • the terminal device is the terminal device provided by the foregoing aspects, and is used to support the terminal device to perform the MIMO precoding method provided by the foregoing first aspect or any possible implementation manner of the first aspect;
  • the network device is the foregoing aspects.
  • the provided network device is configured to support the network device to perform the MIMO precoding method provided by the foregoing second aspect or any possible implementation manner of the second aspect.
  • FIG. 1 is a schematic diagram of an uplink MIMO precoding system according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a precoding method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a coding format of a precoding quantization parameter configuration set according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a non-uniform quantized value information format according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another non-uniform quantized value information format according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of an information format of a bit map quantization value according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of an information format of another bit map quantization value according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a possible logical structure of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a possible logical structure of a base station according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an uplink MIMO precoding system according to an embodiment of the present disclosure.
  • the uplink MIMO precoding system may be part of a larger wireless communication system, and Figure 1 shows only the functional modules associated with the present invention.
  • at least one base station (English name: Base Station, BS for short) 100 and one or more UEs are included.
  • BS Base Station
  • UE 110, UE 120 and UE 130 are shown by way of example, and the system may also include other numbers of UEs.
  • the description includes three UEs as an example.
  • the UEs 110-130 may be stationary or mobile devices.
  • the mobile device can be a mobile phone, a smart terminal, a tablet, a laptop, a video game console, a multimedia player, and the like.
  • Stationary devices are usually located in fixed locations, such as computers, access points (connected to the network via wireless links), and so on.
  • the base station 100 may be an LTE evolved base station (English full name: E-UTRAN NodeB, English abbreviation: eNB), or a next generation base station (English name: next generation NodeB, English abbreviation: gNB), or an access point device and Any network device that accesses the UE device.
  • the base station 100 communicates with the UEs 110-130, and the UE 110-130 transmits an SRS to the base station.
  • the base station 100 performs channel estimation through the SRS, generates precoding quantization parameter information of the UE 110-130 according to the channel estimation result, and generates the generated precoding quantization parameter information.
  • 110-130 is configured to the UE 110-130 through the air interface.
  • the base station 100 needs to complete the configuration of the precoding quantization parameter information for the UEs 110-130 before the UE 110-130 transmits the data.
  • the base station 100 obtains the channel change of the UE 110-130 by continuously measuring the SRS transmitted by the UE 110-130.
  • the base station 100 determines whether to change the precoding matrix of the UE 110-130 according to the monitored channel change condition. If it is determined that the precoding matrix of the UE 110-130 needs to be changed, the precoding quantization result information is sent to the UE 110-130, so that the UE 110-130 is configured according to the UE 110-130.
  • the transmitted precoding quantization result information and the configured precoding quantization parameter information re-obtain a new precoding matrix to accommodate the channel change requirement. Precoding of the channel state changes can be provided to the UEs 110-130 by precoding the quantized result information, thereby reducing inter-stream interference.
  • the UE Due to the movement of the UE, or the change of the number of adjacent UEs, and the propagation characteristics of the air interface channel, the UE needs to adjust the precoding matrix according to the channel characteristics due to the change of the channel characteristics during the mobile process.
  • the conventional precoding using a fixed codebook cannot accurately reflect the channel condition of the UE. Especially in the case of a large number of UEs, there are channels inter-channel interference between different streams. Therefore, the selected precoding matrix cannot adapt to the current channel condition.
  • the precoding matrix adapted to the channel variation is used to make the precoding matrix dynamically change with respect to the traditional precoding scheme.
  • the dynamic change causes overhead due to the need to transmit the precoding matrix information, and in order to reduce overhead,
  • the precoding matrix information needs to be compressed.
  • the precoding matrix information is mainly the value of each element of each vector constituting the precoding matrix determined by the base station 100 for the UE 110-130 based on the result of the SRS measurement on the UEs 110-130. Quantizing the values of the elements of each vector constituting the precoding matrix is an effective means of compressing the information of the precoding matrix information.
  • the precoding quantization parameter information provides a quantitative basis for quantization.
  • the precoding quantization parameter information is a set of parameters set for providing quantization basis for quantization.
  • the precoding quantization parameter information provides a quantization basis for each element of each vector constituting the precoding matrix, at the UE 110-130.
  • the precoding quantization parameter information provides a dequantization basis for each element of each vector of the restoration precoding matrix.
  • the base station 100 configures precoding quantization parameter information for the UEs 110-130 before transmitting the precoding quantized result information to the UEs 110-130.
  • the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index.
  • the precoding quantization parameter configuration set includes a set of precoding quantization parameters.
  • the precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of a quantized value, quantization method indication information, bandwidth indication information, base vector indication information.
  • the bit number information of the quantized value is used to represent the bit number of the quantized value, and the bit number information of the plurality of quantized values may be used, and the bit bit information of each quantized value respectively corresponds to the quantized value of the quantized interval.
  • the information of the binary bit number, the bit number information of the quantized value of different quantization intervals may be the same or different.
  • the quantization interval refers to dividing the value range into different collection spaces that are continuous and do not overlap each other by the information of the quantization threshold, and continuously indicates that one of the sets contains the information of the quantization threshold.
  • T divides the real number [0, 1] into two quantization intervals, where the symbol [] represents a closed interval, a set of real numbers including 0 and 1.
  • T divides the set of [0, 1] into quantization spaces [0, T) and [T, 1], or, [0, T] and (T, 1], where [0, T) and (T, 1) ] respectively denotes a semi-closed half-open interval and a half-open half-closed interval, that is, greater than or equal to 0 and less than T, and greater than T and less than or equal to 1, which is a representation of a general mathematical interval, and the present application considers the concept of the interval to be It is well known to those skilled in the art and will not be described in detail.
  • the bit number information including the quantized value of the quantization threshold and the bit number information of the quantized value smaller than the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, and bit number information smaller than or equal to the quantization value of the quantization threshold.
  • each quantized interval range follows the above-described interval dividing method, that is, continuous
  • the different sets of spaces that do not overlap each other may have the same or different bit numbers of the quantized values of the respective intervals, that is, the bit number information of the plurality of quantized values may be the same or different.
  • the precoding quantization parameter configuration set index is index information for indicating a precoding quantization parameter configuration set.
  • the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set have a correspondence relationship, and the information of the precoding quantization parameter configuration set can be obtained by using the precoding quantization parameter configuration set index.
  • the base station 100 configures the precoding quantization parameter information for the UE 110-130, the base station 100 performs configuration by precoding the quantization parameter configuration set index.
  • the UE 110-130 is configured with multiple sets of precoding quantization parameter configuration sets, and each set of precoding quantization parameter configuration sets corresponds to one precoding quantization. Parameter configuration set index.
  • the plurality of sets of precoding quantization parameter configuration sets are predefined, and the base station 100 does not need to configure multiple sets of pre-configurations to the UE 110-130 before assigning the UE 110-130 a precoding quantization parameter configuration set index.
  • the information of the quantization configuration set is encoded.
  • both the base station 100 and the UEs 110-130 pre-store the correspondence between the predefined precoding quantization parameter configuration set index and the precoding quantization parameter configuration set.
  • the base station 100 configures a precoding quantization parameter configuration set index for the UE 110-130, and the UE 110-130 uses the pre-stored pre-predefined quantization parameter configuration set index and the pre-coding quantization parameter configuration set by using the received pre-coding quantization parameter configuration set index.
  • the correspondence between the two sets of specific precoding quantization parameter configuration sets can be obtained.
  • base station 100 can also configure a set of quantization parameter configurations directly for UEs 110-130.
  • the quantization method indication information is mainly used to indicate the quantization method, and the precoding quantization result information obtained by different quantization methods is different. When only one quantization method is supported, the quantization method indication information is not necessary.
  • the bandwidth indication information is used to indicate whether the current quantization is for a partial bandwidth or a full bandwidth.
  • the base vector indication information includes a bit map string and/or base vector length indication indicating the base vector.
  • the base vector indication information is related to the quantization method and is only used for the bit mapping quantization method.
  • the bit map string is used to specify the base vector.
  • the base vector length indicates the number of elements used in a given base vector. If the number of elements of a given base vector are the same, the base vector length indication is not necessary.
  • the base vectors are all predefined, in which case both the base station 100 and the UEs 110-130 pre-store the base vectors in the device.
  • the base station 100 needs to configure the base vector set for the UE before configuring the precoding quantization parameter information for the UE 110-130.
  • the set of base vectors includes at least one basis vector.
  • the precoding quantization parameter information may not need to be changed frequently, and therefore, its configuration does not need to be completely dynamic, and may be a semi-static configuration, that is, reconfiguration is performed when reconfiguration is required, for example, the channel state is due to the UE environment. When the changes are greatly different, the precoding quantization parameter information is reconfigured.
  • the base station 100 obtains a precoding matrix by channel measurement, and quantizes each element of each vector in the precoding matrix according to the precoding quantization parameter information to obtain a quantized value of each element, thereby The precoded quantized result information is obtained.
  • the precoding quantized result information includes at least one of the following information: a quantized value, a maximum value index, a quantized value length indication, and an information length.
  • the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix; a maximum value index is used to indicate a maximum norm value of all elements of each vector of the precoding matrix a location where the quantized value length indication includes a real part length indication and an imaginary part length indication for indicating bit number information of the quantized value; and the information length is used to indicate that the quantized value includes the precoding matrix The number of vectors and the number of elements of each of the vectors, or the total byte length of the quantized values.
  • FIG. 1 shows the main functions associated with base station 100 and UE 110-130 precoding. It should be noted that the data receiving function of the base station 100 is not shown in FIG. 1 to receive the data stream sent by the UE 110-130 by using the obtained precoding matrix for precoding. It should be understood that this is a normal data receiving function. Therefore, the present application is considered to be a basic function as a person of ordinary skill in the art.
  • FIG. 1 does not show the receiving function of the base station 100 receiving the data transmitted by the UE 110-130 using the precoding matrix, but the function is present. .
  • the channel estimation 101 measures the SRS transmitted by the UEs 110-130 and estimates the channels of the UEs 110-130.
  • the state information of the channel can be obtained by channel estimation. This is no different from the traditional channel estimation and will not be described again.
  • the precoding quantization parameter information generation and configuration function 102 mainly includes two functions: one is to determine precoding quantization parameter information for the UE 110-130 according to the result of the channel estimation 101, and the second is to configure the precoding quantization parameter information to the UE 110-130.
  • the configuration of the precoding quantization parameter information for the UE 110-130 includes two aspects. On one hand, the UE 110-130 is assigned a precoding quantization parameter configuration set information. On the other hand, as described above, the 102 may also be the UE 110-130.
  • the information of the multiple sets of precoding quantization parameter configuration sets is configured, and the information of the multiple precoding parameter configuration sets may not be based on current measurement results, but multiple sets of feasible precodings generated according to long-term statistics of channel measurements of the UEs 110-130 Quantize information about a parameter configuration set.
  • the base station 100 does not have to configure the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the UE 110-130.
  • the precoding quantization parameter information generation and configuration function 102 should further include a pre-stored correspondence between the pre-defined pre-coding quantization parameter configuration set index and the pre-coding quantization parameter configuration set.
  • the precoding quantized result information generation 103 is mainly based on the result of the channel estimation. For example, if the channel state changes and the received signal quality drops to a certain range, the base station 100 can regenerate the precoded quantization result information to match the new channel state.
  • the precoding quantization result information is a result of quantizing elements of each vector constituting the precoding matrix by precoding quantization parameter information.
  • 111, 121, 131 first acquires precoding quantization parameter information, and saves precoding quantization parameter information.
  • Obtaining the precoding quantization parameter information includes two aspects.
  • the first aspect is that the precoding quantization parameter information that is received by the receiving base station 100 may be configured by using a precoding quantization parameter configuration set index, or may be directly configuring a precoding quantization parameter configuration set.
  • Information; on the other hand, obtaining the precoding quantization parameter information further includes obtaining, from the base station 100, a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set before acquiring the precoding quantization parameter information configured by the base station 100.
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is predefined, and the precoding quantization parameter information acquisition 111, 121, 131 of the UE 110-130 should also include pre-preserving the predefined precoding.
  • 113, 123, 133 recovers, ie, dequantizes, the elements constituting the precoding matrix according to the received precoding quantization parameter information and the precoding quantization result information, thereby restoring the precoding matrix.
  • the base station 100 receives the data stream transmitted by the UE 110-130, which is encoded by the UE 110-130 using a precoding matrix obtained by precoding quantization result information and precoding quantization parameter information.
  • the base station 100 configures precoding quantization parameter information and precoding quantization result information for the UE 110-130, so that dynamic precoding can be implemented to adapt to channel changes, reduce inter-stream interference, and improve system capacity.
  • the air interface signaling overhead is reduced by separately transmitting the precoding quantization parameter information and the precoding quantization result information.
  • FIG. 2 is a schematic flowchart diagram of a precoding method according to an embodiment of the present application. Referring to FIG. 2, the method is applied to the precoding system shown in FIG. 1. It should be understood that the terminal 110 in the figure is only an example and can be used for any base station 100. Here, for the sake of explanation, all subsequent The terminal 110 used may be any terminal served by the base station 100, and details are not described herein. The method includes the following steps.
  • Step 201 The base station 100 generates precoding quantization result information and sends it to the terminal 110.
  • the UE receives the determined precoding quantization result information sent by the base station.
  • the base station 100 measures the SRS signal sent by the terminal 110, and obtains a precoding matrix, and generates precoding quantization result information according to the precoding matrix.
  • the base station 100 uses radio resource control (English full name: Radio Resource Control, English abbreviation: RRC) signaling, or MAC full name: Medium Access Control, English abbreviation: MAC) layer control signaling (English full name: MAC Control Element , English abbreviation: MAC CE), or physical downlink shared channel (English full name: Physical Downlink Control CHannel, English abbreviation: PDCCH) indicated physical downlink shared channel (English full name: Physical Downlink Sharing CHannel, English abbreviation: PDSCH)
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • layer control signaling English full name: MAC Control Element , English abbreviation: MAC CE
  • physical downlink shared channel English full name: Physical Downlink Control CHannel, English abbreviation: PDCCH
  • PDCCH Physical Downlink Sharing CHannel, English abbreviation: PDSCH
  • the UE receives the precoding quantization result information sent by the base station by using the foregoing sending manner in a corresponding manner, that is, the precoding quantization result information is carried in one of the messages, and specifically, which message is used for transmission is defined by the protocol,
  • the embodiment does not make provisions.
  • Step 202 The terminal 110 determines a precoding matrix according to the received precoding quantization result information and precoding quantization parameter information.
  • the terminal 110 further includes acquiring precoding quantization parameter information before receiving the precoding quantization result information.
  • the obtained precoding quantization parameter information is used to dequantize the received precoding quantization result information, thereby obtaining a precoding matrix.
  • the obtaining the precoding quantization parameter information may be that the terminal 110 receives the precoding quantization parameter information sent by the base station 100, and the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or precoding quantization. Parameter configuration set index.
  • the base station 100 transmits precoding quantization parameter information to the terminal 110 through a physical downlink control channel (PDCCH), or MAC layer control signaling (MAC CE), or radio resource control (RRC) signaling, that is, precoding quantization parameter information.
  • the bearer is carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling.
  • the terminal receives the precoding quantization parameter information sent by the base station by using the foregoing sending manner in a corresponding manner.
  • the terminal 110 Before receiving the precoding quantization result information, the terminal 110 first needs to obtain precoding quantization parameter information from the base station.
  • the precoding quantization parameter information is transmitted to the UE together with the precoding quantization result information, which may be through the same message, or may be through different messages, such as different MAC CEs of the same message.
  • the precoding quantization result information and the precoding quantization parameter information are simultaneously transmitted.
  • the precoding quantization parameter information and the precoding quantization result are not necessarily transmitted to the terminal 110 at the same time, and the transmission to the terminal 110 means that the reception of the precoding quantization result is accompanied by the reception of the precoding quantization parameter information, because the precoding quantization parameter
  • the change of information may not be as frequent as the change of the precoding quantization result information. Not every time a new precoding quantization result information is generated, the precoding quantization parameter information is changed.
  • a precoding quantization parameter configuration set may be a long period of time. There is no change in time, and the precoding quantized result information changes frequently.
  • the precoding quantization parameter information described above is also used in step 201 to generate precoding quantization result information by the base station 100.
  • the base station 100 generates precoding quantized result information using the precoding quantization parameter configuration set given by the precoding quantization parameter information according to the determined precoding quantization parameter information.
  • Step 203 The terminal 110 pre-codes and transmits the data stream according to the determined pre-coding matrix.
  • the receiving terminal 110 uses the precoding matrix to encode the data stream.
  • the interaction between the precoding parameter information and the precoding quantization result information between the base station and the terminal can be implemented, so that the terminal can dynamically change the precoding matrix, adapt to channel changes, and reduce inter-stream interference.
  • the message transmitted by the air interface is compressed, and the signaling overhead is reduced.
  • the method further includes:
  • the base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110.
  • the base station configures a plurality of sets of precoding quantization parameter configuration sets for the terminal, and a precoding quantization parameter configuration set index uniquely corresponds to a precoding quantization parameter configuration set.
  • the base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110, the base station 100 only needs to specify one precoding quantization parameter configuration set when configuring the precoding quantization parameter information for the terminal 110.
  • the terminal 110 acquires information of the precoding quantization parameter configuration set according to the precoding quantization parameter configuration set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set.
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is carried in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE).
  • RRC Radio Resource Control
  • MAC CE MAC layer control signaling
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset. In this case, the base station 100 does not need to configure the precoding quantization parameter configuration set index and precoding through the air interface.
  • the corresponding relationship between the parameter configuration set is quantized, and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is pre-stored in both the base station 100 and the terminal 110, and the base station 100 is configured to configure the precoding quantization parameter information for the terminal 110. Only one precoding quantization parameter configuration set index needs to be specified, and the terminal 110 acquires information of the precoding quantization parameter configuration set according to the preset correspondence between the preset precoding quantization parameter configuration set index and the precoding quantization parameter configuration set.
  • the base station configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set by the base station, so that the overhead of the precoding quantization parameter information can be reduced, so that only the precoding quantization parameter configuration set index can be configured to configure the terminal 110.
  • a set of precoding quantization configuration sets If the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, the air interface signaling overhead will be greatly reduced.
  • FIG. 3 is a schematic diagram of a coding format of a precoding quantization parameter configuration set according to an embodiment of the present disclosure.
  • the precoding quantization parameter information includes at least one of the following information: quantization threshold information 301, quantization value bit number information 302, quantization method indication information 303, bandwidth indication information 304, base vector indication information 305. It should be understood that 301-305 in Figure 3 need not be present at the same time.
  • the base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110, or the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, the terminal is preset.
  • the precoding quantization parameter configuration set may be obtained by precoding the quantization parameter configuration set index.
  • the precoding quantization parameter information includes a precoding quantization parameter configuration set index, and other information is not necessarily included in the precoding quantization parameter information. If the pre-defined bandwidth is less than a certain value, such as 20M, the precoding will be for the full bandwidth, then the bandwidth indication information is not necessary at this time.
  • each parameter may include a parameter type indication information, for example, 3 bits may be used, and different values represent different parameters.
  • the embodiment of the present invention provides a flexible encoding format of precoding quantization parameter information, which can be adapted to the configuration of precoding quantization parameter information in different scenarios.
  • the precoding quantization parameter information 300 includes quantization method indication information, and the quantization method may include the above non-uniform quantization, bit map quantization, or other quantization methods.
  • the precoding quantization parameter information 300 includes the quantization method indication information, there may be at least two methods: one is that each precoding quantization parameter configuration set index is associated with one quantization method indication information, and the other is that a quantization method indicates that the information is associated with a group.
  • Precoded quantization parameter configuration set index Table 1 below shows an example in which each precoding quantization parameter configuration set index is associated with one quantization method indication information.
  • each precoding quantization parameter configuration set index is sequentially numbered, and each precoding quantization parameter configuration set index associates information of a set of quantization thresholds, bit number information of quantized values, and a quantization method.
  • Table 1 is only an example, does not represent an actual configuration table, or the value of each parameter in the configuration table is fixed.
  • the value of the precoding quantization parameter configuration set corresponding to each precoding quantization parameter configuration set index in the table may be arbitrarily configured, or may be defined by a standard.
  • An example of a quantization threshold is given in the table.
  • the precoding quantization parameter configuration set index provided by the user may be obtained, and the quantization method indication information may be obtained by using the precoding quantization parameter configuration set index, and the method is simple.
  • the corresponding precoding quantization parameter configuration set may be independently determined by the quantization method indication information, as shown in Tables 2 and 3.
  • different quantization methods respectively correspond to a precoding quantization parameter information table.
  • the quantization parameter is performed by precoding the quantization parameter configuration set index. Configuration.
  • the numbers of the precoding quantization parameter configuration set indexes in Table 2 and Table 3 may or may not be repeated. When not repeated, there is no essential difference from Table 1, and the index can be uniquely configured by precoding the quantization parameter configuration set index.
  • a precoding quantization parameter configuration set when the precoding quantization parameter configuration set is relatively large, the number of bits used for precoding the quantization parameter configuration set index is relatively large, so the overhead is relatively large.
  • the quantization method indication information and the precoding quantization parameter configuration set index are required to jointly design a set of precoding quantization parameter configuration sets.
  • the quantization method indicates that the information is not necessary and depends on the specific implementation method or convention.
  • the length of the precoding quantization parameter configuration set index can be reduced, and the overhead is reduced, especially when the precoding quantization parameter configuration set index is relatively large.
  • the precoded quantization parameter information needs to include base vector indication information, ie, a bit map bitmap and/or a base vector length indication of the selected base vector.
  • the precoding quantization parameter information may be carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling.
  • PDCH Physical Downlink Control Channel
  • MAC CE MAC Layer Control Signaling
  • RRC Radio Resource Control
  • quantization method indication information independently determines its corresponding precoding quantization parameter configuration set, when recoding the precoding quantization parameter information using the precoding quantization parameter configuration set index, it is necessary to simultaneously assign the quantization method indication.
  • the information is combined with the precoded quantization parameter configuration set index to determine a precoding quantization parameter configuration set.
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is configured by radio resource control (RRC) signaling or MAC layer control signaling (MAC CE)
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • a precoding quantization parameter configuration set is directly activated, and a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE) is used to reconfigure the precoding quantization parameter configuration set.
  • RRC radio resource control
  • MAC CE MAC layer control signaling
  • the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, that is, fixedly configured by a protocol definition manner.
  • the base station 100 and the terminal 110 can obtain the information of the precoding quantization parameter configuration set through the precoding quantization parameter configuration set index according to the preset correspondence.
  • only one precoding quantization parameter configuration set index needs to be configured through a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE) to assign a precoding quantization parameter configuration set.
  • PDCCH Physical Downlink Control Channel
  • MAC CE MAC Layer Control Signaling
  • the base station 100 since the correspondence between the configuration precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is predefined, the base station 100 does not need to configure the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110. Relationship, air interface signaling overhead can be further reduced.
  • the base station 100 After the base station 100 obtains the precoding matrix and quantizes each element of each vector of the matrix, the obtained precoded quantized value needs to be transmitted in the air interface, but the precoding quantization result information of the air interface transmission has a certain format, and is different.
  • the quantization method and the precoding quantization parameter configuration set index since the bit number information of different quantization values may be the same, may be different, and the content of different quantization methods is also different, for effective information transmission and reducing overhead, It is necessary to define an efficient precoding quantization result information format.
  • the air interface transmission format of the precoding quantization result information will be described below.
  • FIG. 4 is a schematic diagram of a non-uniform quantized value information format according to an embodiment of the present application.
  • the precoding quantized result information 400 mainly includes two parts: one is the information length 410, and the other is the non-uniform quantized value 420.
  • the non-uniform quantized value 420 contains quantized values of the real and imaginary parts of each element of each vector of the precoding matrix, and this embodiment assumes that there are two vectors.
  • the quantized values of the real and imaginary parts of each element of each precoding matrix vector contain a maximum index value 4211, 4221, and quantized values of the real and imaginary parts of each element except the element corresponding to the largest index value.
  • the first element quantized value 4212 of the first vector of the precoding matrix further includes the quantized value of the real part I and the quantized value of the imaginary part Q. Since the quantization lengths of the real part and the imaginary part are the same in the quantization mode 0-4 of Table 1 or 2, the bit number of the quantized value is fixed, and it is not required to be given in the encoding of the precoding quantization result information, and the precoding is performed.
  • the bit number information of the quantized value can be known by the information of the quantization parameter configuration set index or the precoding quantization parameter configuration set.
  • FIG. 5 is a schematic diagram of another non-uniform quantized value information format according to an embodiment of the present disclosure.
  • 5 is another different encoding format for the non-uniform quantized value 420 of FIG. 4, with the information length 410 omitted for convenience. It should be understood that the information length 410 is still part of FIG. 5, and only the different information formats of the non-uniform quantized values 420 are given herein for the purposes of the description only.
  • the real part 514, 518, 524, 528 of the element of each vector of each precoding matrix and the imaginary part 515, 519, 525, 529 have different bit number information of the quantized value, and each element has The length of the binary value of the value obtained by the real part I and the imaginary part Q may be different.
  • the real part length indications 512, 516, 522, 526 of the real part I and the imaginary part length indications 513, 517, 523, 527 of the imaginary part Q are required, so that the UE 110-130 can obtain the bit number information of the corresponding quantized value according to the real part length indication and the imaginary part length indication, whereby, the value of the real part I and the value of the imaginary part Q of each element before quantization can be recovered from the quantized value of the real part and the imaginary part of each element and the precoding quantization parameter information.
  • FIG. 1 the real part length indications 512, 516, 522, 526 of the real part I and the imaginary part length indications 513, 517, 523, 527 of the imaginary part Q
  • the real bit length indication of the same element and the bit number information of the quantized value indicated by the imaginary part length are collectively placed, or may be separately placed, that is, a real length indication or an imaginary length indication is followed by a quantized value. It is also possible to focus the real part length indication and the imaginary part length indication of all the elements except the elements corresponding to the maximum value index of the vector.
  • the real part length indication and the imaginary part length indication of each element may be represented by one bit for a scene having only one quantization threshold, for example, 0 means less than the quantization threshold, 1 means greater than or equal to the quantization threshold, and is indicated by the real part length.
  • the bit number information of the quantized value can be obtained by the imaginary part length indication.
  • the base station 100 and the UE 110-130 can easily unify the format of the pre-encoded quantized result information, and the UE 110-130 can correctly parse the pre-encoded quantized result information and simultaneously implement an effective encoding format. Compression of information transmission reduces air interface signaling overhead.
  • FIG. 6 is a schematic diagram of an information format of a bit map quantization value according to an embodiment of the present disclosure. 6 is a scenario in which the bit number information of the quantized value of the real part I and the imaginary part Q of the coefficient of each base vector is the same for the quantization mode 11-15 in Table 1 and the quantization mode 0-3 in Table 2.
  • the precoding quantization result information 600 based on the bit map quantization includes two parts: an information length 610 and a bit map quantization value 620.
  • the information length 610 is different from the encoding mode of the information length 410 in the non-uniform quantization described above in the bit map quantized precoding quantization result information encoding.
  • the information length 610 is mainly used to indicate the encoding length information of the precoding quantization result information in the bit mapping quantization, which is represented by bytes. Since the base vector indication information is given in the precoding quantization parameter information in the bit map-based quantization method, information of the number of base vectors and the number of elements of each base vector can be obtained by the base vector indication information, and therefore, In a preferred arrangement, the information length 610 in the pre-coded quantized result information 600 based on the bit map quantization may be omitted.
  • bit map quantized value 602 part does not need to include the real part length indication and the imaginary part length indication, and the real part and the virtual part of all the coefficients The quantized result of the part has the same bit length.
  • FIG. 7 is a schematic diagram of an information format of another bit map quantization value according to an embodiment of the present disclosure. 7 is a different encoding format of the bit map quantized value 620 of FIG. 6, with the information length 610 omitted for convenience. It should be understood that the information length 610 is as described above and will not be described again.
  • the bit map quantized value 700 in FIG. 7 is different from the bit map quantized value 620 of FIG. 6 in that the bit bit information of the plurality of quantized values is different.
  • the real part 713, 723 and the imaginary part 714, 724 of each coefficient are quantized, the real part 713, 723 and the imaginary part 714, 724 of each element are quantized.
  • the length of the binary value may be different. Therefore, the real part length indication 711, 721 of the real part I and the imaginary part length indication 712, 722 of the imaginary part Q are required, so that the UE 110-130 can obtain the corresponding according to the real part length indication and the imaginary part length indication.
  • the bit number information of the quantized value is such that the value of the real part I and the value of the imaginary part Q of each coefficient before quantization can be recovered from the quantized value of the real part and the imaginary part of each coefficient and the precoded quantization parameter information.
  • the real part length indication and the imaginary part length indication of the quantized value of the real part I and the imaginary part Q of the same coefficient are collectively placed, and may also be placed separately, that is, a real part length indication or an imaginary part length indication followed by a quantized value . It is also possible to centrally place all real length indications and imaginary length indications of the coefficients of all base vectors.
  • the real part length indication and the imaginary part length indication of the real part I or the imaginary part Q may be represented by one bit for a scene having only one quantization threshold, for example, 0 means less than the quantization threshold, and 1 means greater than or equal to the quantization threshold, and The bit number information of the quantized value can then be obtained by the real part length indication and the imaginary part length indication and the precoding quantization parameter information.
  • the base station 100 and the UE 110-130 can easily unify the format of the pre-encoded quantized result information, and the UE 110-130 can correctly parse the pre-encoded quantized result information, and is effective at the same time.
  • the encoding format implements compression of information transmission and reduces air interface signaling overhead.
  • the base station 100 can perform precoding quantization parameter information and precoding quantization result information on the air interface.
  • the message that the precoding quantization parameter information and the precoding quantization result information can be transmitted in the air interface is as described above, and will not be described again.
  • the signaling names of the foregoing signaling RRC, MAC CE, PDCCH, PDSCH are only methods for transmitting different messages, and different message names may be adopted in different technologies or different standard specifications, and those skilled in the art may be used. Any other name or variant of the signaling that is conceivable should fall within the technical scope disclosed in the embodiments of the present invention.
  • the UE 110-130 receives the precoding quantization parameter information and the precoding quantization result information through the air interface, and dequantizes the received precoding quantization result information, thereby obtaining a precoding matrix.
  • the process and processing of receiving messages by UEs 110-130 are as shown in FIGS. 1 and 2. It should be understood that the UE 110-130 does not need to receive the precoding quantization parameter information and the precoding quantization result information at the same time, and the received meaning means that each time the precoding quantization result information is received, the transmission of the precoding quantization parameter information is accompanied by precoding.
  • the transmission of the quantization parameter information is preceded by precoding the quantized result information or received in the same message. As described above, the reception of the precoding quantization parameter information and the precoding quantization result information may be independent of each other.
  • the base station 100 measures the SRS transmitted by the UE, such as the UE 101, to obtain a channel estimation matrix H.
  • the base station 100 obtains a precoding matrix by decomposing the obtained channel estimation matrix H.
  • the precoding matrix contains one or more vectors, each vector containing several elements, each element being a complex number containing the real part I and the imaginary part Q. Each element constituting each vector of the precoding matrix is quantized to obtain a set of quantized values.
  • the quantization method is non-uniform quantization. It should be understood that the non-uniform quantization here is only an example, and the purpose thereof is to obtain the quantified result, and any other quantization method or replacement that is easily conceived by the spectrum technicians in the art should belong to the technical scope disclosed in the embodiments of the present invention.
  • a unitary matrix By performing singular decomposition on the channel estimation matrix H obtained by SRS measurement, a unitary matrix can be obtained, and a precoding matrix is obtained by selecting the right singular vector having the largest eigenvalue in the N columns of the unitary matrix.
  • the singular decomposition of the channel estimation matrix H is well known and will not be elaborated here.
  • a channel estimation matrix H is obtained, which is a 64 ⁇ 8 matrix. Singularly decomposed H to obtain an 8 ⁇ 8 ⁇ matrix.
  • the number of antenna ports is also commonly referred to as a channel, for example, having a 64-antenna port number is also referred to as 64 channels. In this application, the number of antenna ports and channels will be used indiscriminately and will not be described.
  • the right singular vector having the largest eigenvalue of N columns is selected from the 8 ⁇ 8 ⁇ matrix, that is, the matrix constituting 8 ⁇ N rank , where N rank represents the number of streams sent, and the number of streams sent Also known as the number of layers (in the present application, the number of streams and the number of layers will be used indiscriminately in many cases, no longer explained), the resulting matrix of 8 ⁇ N rank is the determined precoding matrix, denoted W .
  • the base station 100 has 64 channels, and the UE, such as the UE 110, has 8 channels, and the UE 110 supports 2 data streams. It should be understood that the base station 100 only receives 64 channels, the UE 110 transmits 8 channels, and each UE supports two data stream transmissions as an example.
  • the protection scope of the embodiment of the present invention is not limited thereto, and any other number of receiving channels, Both the transmission channel and the number of streams are within the scope of this application.
  • the embodiment of the present invention takes non-uniform quantization as an example, but any modification or replacement of any other quantization method that is easily conceived by those skilled in the art should fall within the technical scope disclosed in the embodiments of the present invention.
  • W [w 1 ,w 2 ]
  • An element called a vector w ir each element being a complex number including the real part (I) and the imaginary part (Q).
  • the binary number of the im is represented by the Y bit, that is, the position index corresponding to the element with the largest element norm in the vector w ir ,
  • the above transformation is such that the element of the maximum of the norm is transformed into 1, so that only the other elements are transmitted without transmission, and the normalized power of the vector w ir is greater than one by the above.
  • the m-1 elements other than the i-th element in the normalized w ir ' are transformed such that the data of the real part I and the imaginary part Q of each element is transformed in [0, 1], [ ] is a general mathematical interval representation method, which means that it is greater than or equal to 0, less than or equal to 1, and will not be described again.
  • the specific transformation method is: transforming the data of the real part I and the imaginary part Q of each element separately; or other transformation methods, as long as the data is transformed into the range [0, 1]
  • pi represents the pi constant
  • the function arccos() represents the inverse cosine function
  • the function real() represents the real part
  • the function image() represents the imaginary part. The details are not described below.
  • Non-uniform quantization is performed on the data of [0, 1] after the number of 2 ⁇ (m-1) (real part and imaginary part) of the m-1 elements except the first element, and the quantization process is:
  • the quantized value of the number of T is represented by Y1 bit, and the quantized value of the number smaller than T is represented by Y2 bit.
  • the range of values to be compared is not limited.
  • the quantized value of the number larger than T may be represented by Y1 bit
  • the quantized value of the number less than or equal to T may be represented by Y2 bit.
  • I i 'and Q i ' are the quantized results of the real and imaginary parts of the i-th element of a vector of the precoding matrix W, respectively.
  • the binary numbers of I i 'and Q i ' can be represented by Y1 or Y2 bits, and the specific number of bits depends on whether the values of I i and Q i are greater than or equal to T or less than T.
  • T' ceil(T*power(2,4))
  • T is multiplied by 10
  • the obtained result is expressed in binary.
  • This embodiment only gives an example and does not specify a specific algorithm for T value quantization. However, the quantization of the T value will use a predetermined quantization method.
  • non-uniform quantization may support 2 or more bit length quantizations to make quantization more accurate.
  • the quantized value smaller than T1 is represented by X1 bit
  • the [0.4, 0.7] interval value is represented by X2
  • the quantized value larger than T2 is represented by X3 bit.
  • the interval range here is only an example, and the value of the interval range is not limited.
  • X2 may also be (0.4, 0.7), where () indicates greater than 0.4, less than 0.7, and X1 bit is used for less than or equal to T1.
  • the quantized value is represented, and the X3 bit is represented by a quantized value greater than or equal to T2.
  • the obtained precoding matrix is passed through a A set of predefined base vectors are combined to obtain a coefficient of each base vector, and a set of quantized results are obtained by quantizing the coefficients of each base vector.
  • This embodiment of the present invention refers to the quantization method as a bit map. Quantify.
  • the UE such as the UE 110
  • the precoding matrix W is:
  • a i is a coefficient and C i is a predefined base vector.
  • the UE side transmits using an 8-antenna port, assuming w 1 :
  • the base vector given in Table 4 above is only an example, and any other base vector can be used to approximate the expression vector w ir , and any other equivalent base vector or replacement that would be readily apparent to those of ordinary skill in the art should It belongs to the technical scope disclosed in the embodiments of the present invention.
  • the embodiment of the present invention is only an example in which the UE has eight antenna ports and two data streams are simultaneously transmitted, but the embodiment of the present invention is not limited thereto.
  • a set of base vector coefficients a 1 , a 2 , ... a n can be obtained.
  • a set of quantized values can be obtained, as follows:
  • the value is represented by Y1 bit
  • the value less than T is represented by Y2 bit, wherein the most significant bit of Y1 and Y2 is used to represent the sign bit, that is, 0 is positive and 1 is negative
  • I i and Q i are respectively quantized as follows. :
  • I i ' and Q i ' are quantized values, and are respectively represented by binary, and the highest bit of the binary representation is a sign bit, and the number of bits specifically represented depends on whether the absolute value of I i and Q i is greater than or equal to T or less than T. .
  • the comparison range of values is not limited here, and may be greater than T and less than or equal to T. No longer.
  • multiple thresholds may be set, and 2 or more bit length quantizations may be supported to make quantization more accurate.
  • T1 0.4
  • T2 0.7
  • the quantized value smaller than T1 is represented by X1 bit
  • the [0.4, 0.7] interval value is represented by X2
  • the quantized value larger than T2 is represented by X3 bit.
  • the range of the interval herein is only an example, and the value of the range of the interval is not limited, and will not be described again.
  • This embodiment takes a quantization threshold as an example. It should be understood that other representation methods having multiple quantized values are equivalent or alternative methods that are easily conceived by those skilled in the art, and are all within the technical scope disclosed by the present invention.
  • the coefficients a 1 , a 2 , . . . , a n can also be normalized, that is, the coefficient with the largest coefficient norm is found from a i , and each The coefficients are normalized:
  • the selection of the base vector C i needs to be specified.
  • a base vector having a different number of ports is defined in consideration of the number of antenna ports supported by the UE, such as the UE 110.
  • base vectors 0-3 represent base vector sets with 4 antenna ports
  • 4-17 represent base vector sets with 8 antenna ports.
  • this can be specified by specifying a base vector length and a selected set of basis vectors.
  • the base vector length indicates the number of antenna ports constituting the vector, that is, the number of elements of the base vector.
  • the selected base vector is indicated by a bit map bitmap.
  • the selected base vector can be represented by a bit string having a length of 18 bits.
  • the 0th bit of the bit string corresponds to the 0th base vector, and the 1st bit corresponds to the first bit.
  • One base vector, each of the other bits and the base vector correspond in turn, and will not be described again. For example, if a total of 8 basis vectors are selected for the base vectors 4-11, the corresponding 4th to 11th bit positions in the bitmap are set to 1, and the other bit positions are 0.
  • Table 4 splits into multiple tables according to the number of antenna ports, that is, the number of elements of the vector, and the vector index of each table is numbered from 0. Therefore, the length of the bit string and the table are The number of base vectors is the same, each bit of the bitmap corresponds to an index of a vector in the table 4, and the vector representation corresponding to the bit position is selected as the base vector.
  • the transmitted pre-encoded quantization result information can be compressed to reduce the air interface transmission overhead.
  • the terminal 110 shown in FIG. 2 dequantizes according to the precoding quantization parameter information received by the previous or current message, and the dequantization process is as follows:
  • the terminal 110 determines the information of the quantization threshold, the bit number information of the quantized value, and/or the quantization method indication information by the precoding quantization parameter configuration set index based on the received precoding quantization parameter information. It is assumed here that the precoding quantization parameter information received by the terminal 110 is included in the precoding quantization parameter configuration set index, and the quantization method is non-uniform quantization.
  • the precoding quantization parameter configuration set may also contain other parameters, it being understood that this does not limit any other implementation of information containing other precoding quantization parameter configuration sets.
  • the terminal 110 parses the number of vectors of the precoding matrix from the precoding quantization result information according to the received precoding quantization result information, and uses the precoding quantization parameter information, and the element with the largest norm of each vector The location index im; taking the first vector as an example, the UE 110-130 parses the number of vectors of the precoding matrix by the vector number of the information length and the vector length indication, and the number of elements of each vector, so that the information can be passed.
  • Y1 or Y2 is the bit number information of the quantized value of the real or imaginary part of each element obtained as described above.
  • the inverse of the obtained dequantized X1 k is obtained:
  • the function cos() is a cosine function, which will not be repeated below.
  • a total of 2 (m-1) values for X2 k constitute m-1 elements: every two consecutive values represent the real part I and the imaginary part Q in one element, namely:
  • w i is obtained. If the UE schedules the r layer in the subband or the full band, that is, the number of vectors of the precoding matrix is r, the above steps may be repeated to determine other vectors, thereby obtaining a precoding matrix:
  • the terminal 110 obtains precoding quantization parameter information, and parses out the base vector indication information, and the base vector indication information can be used to know the precoding matrix.
  • the number of vectors that is, the precoded stream number or layer number r and the length of each vector, that is, the number of elements of each vector.
  • the specific dequantization process is as follows:
  • the dequantized values Xi are combined every two groups, that is, the real and imaginary parts of the coefficients a i of each base vector are obtained:
  • X2i-1 is the real part and X2i is the imaginary part.
  • the precoding matrix of the subband or the full band is obtained as follows:
  • the terminal 110 may perform uplink MIMO precoding based on the subband or the full band precoding matrix obtained by the above dequantization.
  • the solution provided by the embodiment of the present application is mainly introduced from the perspective of the interaction between the base station and the terminal and the quantization and dequantization of the base station and the terminal.
  • the base station and the terminal include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in conjunction with the network elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the embodiments of the present application may divide the functional modules of the base station and the terminal according to the foregoing method.
  • each functional module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 8 is a schematic diagram showing a possible structure of a terminal involved in the foregoing embodiment.
  • the terminal 800 includes a receiving unit 801, a processing unit 802, and a sending unit 803.
  • the receiving unit 801 is used by the terminal to perform the step 201 of receiving the precoding quantization result information in FIG. 2, and the receiving unit 801 is further configured to receive the precoding quantization parameter information by the terminal.
  • the receiving unit 801 is further configured to: the terminal performs the receiving of the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set; the processing unit 802 is configured to support the terminal to obtain the precoding quantization parameter information, and is further configured to The precoding quantization result information and the precoding quantization parameter information determine a precoding matrix, and the data stream is precoded according to the precoding matrix; optionally, the processing unit 802 is further configured to obtain a precoding quantization parameter configuration set index and a precoding quantization parameter.
  • the configuration set configured to obtain the precoding according to the precoding quantization parameter configuration set index received by the receiving unit 801 and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set
  • the information of the parameter configuration set is quantized; the sending unit 803 is configured to support the terminal to send the pre-coded data stream to the base station.
  • the receiving unit 801 may be a receiver
  • the processing unit 802 may be a processor
  • the sending unit 803 may be a transmitter
  • the receiver and the transmitter may constitute a communication interface.
  • FIG. 9 is a schematic diagram showing a possible logical structure of a terminal involved in the foregoing embodiment provided by an embodiment of the present application.
  • the terminal 900 includes a processor 902.
  • the processor 902 is configured to perform control management on the action of the terminal.
  • the processor 902 is configured to support the terminal to perform acquiring pre-encoding quantization parameter information, and is further configured to perform pre-coding quantization result information and pre-
  • the coded quantization parameter information determines a precoding matrix, precodes the data stream according to the precoding matrix, and is further configured to obtain a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set, configured to configure according to the precoding quantization parameter
  • the set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set acquire information of the precoding quantization parameter configuration set.
  • the terminal may further include a memory 901, a communication interface 903 or a bus 904.
  • the memory 1101 is configured to store code and data of the terminal.
  • the communication interface 903 is used for the terminal to communicate with the base station to perform data transmission and reception.
  • the communication interface 903, the processor 902, and the memory 901 are connected to one another via a bus 904.
  • the processor 902 can receive data from the communication interface 903 or the memory 901 via the bus 904, or transfer the data to the memory 901 via the bus 904 for storage or transmission to the communication interface 903 for transmission.
  • the processor 902 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the bus 904 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.
  • FIG. 10 is a schematic diagram showing a possible structure of a base station involved in the foregoing embodiment.
  • the base station 1000 includes a receiving unit 1001, a processing unit 1002, and a sending unit 1003.
  • the sending unit 1003 is configured to support the step 201 of precoding quantization result information sent in FIG. 2, and the sending unit 1003 is further configured to send precoding quantization parameter information.
  • the sending unit 1003 is further configured to send, to the terminal, a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set, the precoding quantization parameter configuration set index and a precoding quantization parameter configuration set.
  • the corresponding relationship is transmitted by radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE);
  • the receiving unit 1001 is configured to receive, by the base station, a data stream sent by the terminal, where the data stream is quantized by using the precoding.
  • the result information and the precoding matrix obtained by the precoding quantization parameter information are encoded;
  • the processing unit 1002 is configured to perform the step 200 of the base station supporting the precoding quantization parameter information in FIG. 2 to generate precoding quantization result information.
  • the receiving unit 1001 may be a receiver
  • the processing unit 1002 may be a processor
  • the sending unit 1003 may be a transmitter
  • the receiver and the transmitter may constitute a communication interface.
  • FIG. 11 is a schematic diagram showing a possible logical structure of a base station involved in the foregoing embodiment provided by an embodiment of the present application.
  • the base station 1100 includes a processor 1102.
  • the processor 1102 is configured to perform control management on the action of the terminal.
  • the processor 1102 is configured to support the base station to perform the determining precoding quantization parameter information in FIG. 2, and generate precoding quantization result information.
  • the base station may further include a memory 901, a communication interface 903, or a bus 904.
  • the memory 1101 is configured to store code and data of the base station.
  • the communication interface 1103 is used for communication between the base station and the terminal to perform data transmission and reception.
  • the communication interface 1103, the processor 1102, and the memory 1101 are connected to one another via a bus 1104.
  • the processor 1102 can receive data from the communication interface 1103 or the memory 1101 via the bus 1104, or transfer the data to the memory 1101 via the bus 1104 for storage or transmission to the communication interface 1103 for transmission.
  • the processor 1102 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus or the like.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the base station or terminal described in the embodiment of the present application may also be a chip system.
  • the chip system includes at least one chip, and may also include other discrete devices.
  • the chip system can be applied to a base station or a terminal to support the base station or the terminal to complete the method provided in the embodiment of the present application.
  • the processor, memory, and communication interface of the terminal or base station described above can be implemented on a separate chip.
  • the processor and memory can be integrated into one chip while the communication interface is on a separate chip.
  • the processor and communication interface (including transceiver circuitry) are integrated into one chip while the memory is on a separate chip.
  • the processor, memory, and communication interface are integrated on the same chip.
  • a readable storage medium stores computer execution instructions, a device (which may be a single chip microcomputer, a chip, etc.) or the processor loads the computer from the storage medium to execute The instructions are executed to execute the method provided in the embodiment of the present application by executing the base station or the terminal.
  • the aforementioned readable storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the device may be The read storage medium reads the computer to execute the instructions, and the at least one processor executes the computer to execute the instructions to implement the methods provided in the embodiments of the present application.
  • a communication system including a base station and at least one terminal.
  • the base station is configured to perform the steps of the base station in the precoding method provided in FIG. 2; and/or the terminal is configured to perform the steps of the terminal in the precoding method provided in FIG. 2.
  • the base station provides a precoding matrix for the terminal to adapt to the channel change, so that the terminal adopts precoding that adapts to the channel change to reduce inter-stream interference and improve system capacity.

Abstract

The present application provides a precoding method and apparatus in a multiple input multiple output (MIMO) system, relating to the technical field of communications, and is used for providing dynamic precoding for a terminal, so as to reduce inter-stream interferences, increase system capacity and decrease air port transmission expenses. The method comprises: receiving, by the terminal, precoding quantification result information sent by a network node, and determining a precoding matrix according to the received precoding quantification result information and precoding quantification parameter information; and precoding by the terminal a data stream according to the precoding matrix.

Description

多天线系统中预编码的方法及装置Method and device for precoding in multi-antenna system
本申请要求于2017年12月15日提交中国国家知识产权局、申请号为201711354580.4、发明名称为“多天线系统中预编码的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese Patent Application filed on Dec. 15, 2017, the Chinese National Intellectual Property Office, Application No. 201711354580.4, entitled "Method and Apparatus for Precoding in Multi-Antenna Systems", the entire contents of which are incorporated by reference. Combined in this application.
技术领域Technical field
本发明涉及通信技术，具体涉及一种多输入多输出(英文全称：multiple-input and multiple-output，英文简称：MIMO)天线系统中预编码的方法和装置。The present invention relates to communication technologies, and in particular, to a method and apparatus for precoding in a multiple-input and multiple-output (MIMO) antenna system.
背景技术Background technique
面向2020年及未来，移动互联网和物联网业务将成为移动通信发展的主要驱动力。5G(英文全称：5th generation mobile networks or 5th generation wireless systems，英文简称：5G)将满足人们在居住、工作、休闲和交通等领域的多样化业务需求，即使在密集住宅区、办公室、体育场、露天集会、地铁、快速路、高铁和广域覆盖等具有超高流量密度、超高连接数密度、超高移动性特征的场景，也可以为UE(英文全称：User Equipment，英文简称：UE)提供超高清视频、虚拟现实、云桌面、在线游戏等极致业务体验。因此5G相对于传统比如LTE(英文全称：Long Term Evolution，英文简称：LTE)网络需要能提供更大带宽，更多连接，更低时延。For 2020 and beyond, mobile Internet and IoT services will become the main driving force for the development of mobile communications. 5G (English name: 5th generation mobile networks or 5th generation wireless systems, English abbreviation: 5G) will meet the diverse business needs of people in the fields of residence, work, leisure and transportation, even in dense residential areas, offices, stadiums, open air Scenes with ultra-high traffic density, ultra-high connection density, and ultra-high mobility, such as assembly, subway, expressway, high-speed rail and wide-area coverage, can also be provided for UE (English name: User Equipment, English abbreviation: UE) Extreme HD video, virtual reality, cloud desktop, online gaming and more. Therefore, 5G needs to provide more bandwidth, more connections, and lower latency than traditional LTE (Long Term Evolution, English abbreviation: LTE) networks.
为满足上述大带宽、大连接、低时延的要求，在可用频谱受限情况下，大规模多输入多输出(英文全称：massive multiple input and multiple output，英文简称：mMIMO)天线技术被认为是5G的关键技术之一，它是唯一可以十倍、甚至百倍提升系统容量的无线技术。相比于4或8天线系统，大规模多天线技术能够通过不同维度(空域、时域、频域等)提升频谱效率和能量利用效率。In order to meet the above requirements of large bandwidth, large connection, and low latency, in the case of limited spectrum available, large-scale multiple input and multiple output (English full name: massive multiple input and multiple output, mMIMO) antenna technology is considered to be One of the key technologies of 5G, it is the only wireless technology that can increase system capacity ten times or even 100 times. Compared to 4 or 8 antenna systems, large-scale multi-antenna technology can improve spectral efficiency and energy utilization efficiency through different dimensions (space, time domain, frequency domain, etc.).
目前4或8天线系统，一般采用开环或者闭环码本指示(codebook index)来实现上行MIMO(最大4流)，采用开环实现上行MIMO发送是指发送端在没有接收端反馈信道状态信息给发送端的情况下，发送端采用某个选定的码本进行预编码。而闭环码本指示实现上行MIMO则是通常是发送端保存多个码本，接收端根据发送端发送的探测参考信号(英文全称：Sounding Reference Signal，英文简称：SRS)对信道进行估计，并根据估计结果为UE选定某个预编码码本，并将选定的预编码码本通过信令指示给发送端，发送端根据接收到指示的码本进行预编码处理。At present, the 4 or 8 antenna system generally adopts an open-loop or closed-loop codebook index to implement uplink MIMO (maximum 4 streams), and adopting open-loop to implement uplink MIMO transmission means that the transmitting end does not receive feedback channel state information to the receiving end. In the case of the sender, the sender uses a selected codebook for precoding. The closed-loop codebook indicates that the uplink MIMO is usually performed by the transmitting end to store multiple codebooks, and the receiving end estimates the channel according to the sounding reference signal (Sounding Reference Signal, English abbreviation: SRS) sent by the transmitting end, and according to The estimation result is that the UE selects a precoding codebook, and the selected precoding codebook is indicated to the transmitting end by signaling, and the transmitting end performs precoding processing according to the codebook that receives the indication.
在未来5G系统中，一旦基站侧天线数增多(如16，32，64，256或更多天线)、上行流数增多(如8，12，24，36，48流),如果在某些场景仍然采用开环，或者码本指示方式，在流间相关性比较高时，则会导致流间干扰，从而导致系统性能降低。In the future 5G system, once the number of antennas on the base station side increases (such as 16, 32, 64, 256 or more antennas) and the number of upstream streams increases (such as 8, 12, 24, 36, 48 streams), if in some scenarios The open loop or codebook indication mode is still used, which leads to inter-stream interference when the inter-stream correlation is relatively high, resulting in system performance degradation.
发明内容Summary of the invention
本发明的实施例提供一种MIMO系统中预编码的方法及装置，解决了现有技术中缺乏在空口动态传输预编码矩阵以适应信道变化，并保持较小的信令开销的问题。The embodiments of the present invention provide a method and an apparatus for precoding in a MIMO system, which solves the problem of lacking dynamic transmission of a precoding matrix in an air interface to accommodate channel changes and maintaining a small signaling overhead.
为达到上述目的，本发明的实施例采用如下技术方案：In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:
第一方面，提供一种MIMO系统中预编码方法，终端接收网络节点发送的预编码量化结果信息，并根据接收到的预编码量化结果信息和预编码量化参数信息确定预编码矩阵，终端根据预编码矩阵对数据流进行预编码。上述实现方式中，终端通过预编码量化结果信息的接收，以及预编码量化参数信息，可以获得适应信道变化的预编码矩阵，降低了信令传输开销，同时适应信道变化的预编码可以减小流间干扰，提升系统容量。A first aspect provides a precoding method in a MIMO system, where a terminal receives precoding quantization result information sent by a network node, and determines a precoding matrix according to the received precoding quantization result information and precoding quantization parameter information, where the terminal according to the pre The coding matrix precodes the data stream. In the above implementation manner, the terminal can obtain the precoding matrix adapted to the channel change by receiving the precoding quantization result information and precoding the quantization parameter information, thereby reducing the signaling transmission overhead, and the precoding adapted to the channel variation can reduce the flow. Interference, increase system capacity.
在第一方面的一种可能的实现方式中，预编码量化结果信息包括如下至少一种信息：量化值，是指预编码矩阵的每个向量的每个元素的实部和虚部的量化值；最大值索引，用于指示预编码矩阵的各向量的所有元素的最大范数值所在的位置；量化值长度指示，用于指示量化值的比特位数；信息长度，用于指示量化值包含的预编码矩阵的向量的个数和每个向量的元素的个数，或者指示量化值的总的字节长度。上述可能的实现方式中，通过这些信息中的一种或多组信息的传输，可以实现预编码量化结果信息的高效传输。In a possible implementation manner of the first aspect, the precoding quantization result information includes at least one of the following information: the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix. a maximum value index indicating a position where a maximum norm value of all elements of each vector of the precoding matrix is located; a quantized value length indication indicating a bit number of the quantized value; and an information length indicating the quantized value included The number of vectors of the precoding matrix and the number of elements of each vector, or the total byte length of the quantized value. In the above possible implementation manner, efficient transmission of pre-coded quantization result information can be achieved by transmission of one or more sets of information.
在第一方面的一种可能的实现方式中，预编码量化结果信息承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中。上述可能的实现方式中，通过特定的信令，可以实现预编码量化结果信息在空口的传输。In a possible implementation manner of the first aspect, the precoding quantization result information is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel (PDCCH) Indicated in the physical downlink shared channel PDSCH. In the foregoing possible implementation manner, the transmission of the pre-coded quantization result information in the air interface can be implemented by using specific signaling.
在第一方面的一种可能的实现方式中，终端在接收预编码量化结果信息之前，还包括：获取预编码量化参数信息。上述可能的实现方式中，终端可以获得预编码量化参数信息，以便于终端可以根据获得的预编码量化参数信息以及预编码量化结果信息获得预编码矩阵。In a possible implementation manner of the first aspect, before receiving the pre-coding quantized result information, the terminal further includes: acquiring pre-encoding quantization parameter information. In the foregoing possible implementation manner, the terminal may obtain precoding quantization parameter information, so that the terminal may obtain the precoding matrix according to the obtained precoding quantization parameter information and the precoding quantization result information.
在第一方面的一种可能的实现方式中，预编码量化参数信息包括预编码量化参数配置集的信息，或预编码量化参数配置集索引。上述可能的实现方式中，可以实现预编码量化参数信息的灵活传输，可以是预编码量化参数配置集，也可以是预编码量化参数配置集索引。In a possible implementation manner of the first aspect, the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index. In the foregoing possible implementation manner, flexible transmission of precoding quantization parameter information may be implemented, which may be a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
在第一方面的一种可能的实现方式中，预编码量化参数配置集包括如下至少一种信息：量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。In a possible implementation manner of the first aspect, the precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of the quantized value, quantization method indication information, bandwidth indication information, a base vector Instructions.
在第一方面的一种可能的实现方式中，量化值的比特位数信息包括：大于等于量化门限的量化值的比特位数信息，和小于量化门限的量化值的比特位数信息，或者，大于量化门限的量化值的比特位数信息，和小于等于量化门限的量化值的比特位数信息。In a possible implementation manner of the first aspect, the bit number information of the quantized value includes: bit number information that is greater than or equal to the quantized value of the quantization threshold, and bit number information that is smaller than the quantized value of the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, and bit number information smaller than or equal to the quantization value of the quantization threshold.
在第一方面的一种可能的实现方式中，基向量指示信息包括一个指示基向量的比特映射串(bitmap)和/或基向量长度指示。In a possible implementation of the first aspect, the base vector indication information includes a bit map and/or a base vector length indication indicating a base vector.
在第一方面的一种可能的实现方式中，预编码量化参数信息承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。上述可能的实现方式中，提供了空口传输预编码量化参数信息的信令方法。In a possible implementation manner of the first aspect, the precoding quantization parameter information is carried in a physical downlink control channel (PDCCH), or MAC layer control signaling (MAC CE), or radio resource control (RRC) signaling. in. In the foregoing possible implementation manner, a signaling method for transmitting precoding quantization parameter information by air interface is provided.
在第一方面的一种可能的实现方式中，终端获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系；终端根据预编码量化参数配置集索引以及预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取预编码量化参数配置集的信息。上述可能的实现方式中，预编码量化参数信息的配置和修改可以通过预编码量化参数配置集索引来进行，有效降低信令开销。In a possible implementation manner of the first aspect, the terminal acquires a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set; the terminal configures a set index and a precoding quantization parameter configuration set index according to the precoding quantization parameter. The correspondence between the precoding quantization parameter configuration set and the precoding quantization parameter configuration set is obtained. In the foregoing possible implementation manner, the configuration and modification of the precoding quantization parameter information may be performed by using a precoding quantization parameter configuration set index, which effectively reduces signaling overhead.
在第一方面的一种可能的实现方式中，预编码量化参数配置集索引和预编码量化参数配置集的对应关系是由网络节点发送给终端，或者是预设的。In a possible implementation manner of the first aspect, the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is sent by the network node to the terminal, or is preset.
在第一方面的一种可能的实现方式中，预编码量化参数配置集索引和预编码量化参数配 置集的对应关系是由网络节点通过无线资源控制(RRC)信令,或者MAC层控制信令(MAC CE)发送给终端的。In a possible implementation manner of the first aspect, the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is performed by the network node by using radio resource control (RRC) signaling, or MAC layer control signaling. (MAC CE) sent to the terminal.
第二方面，提供一种MIMO系统中预编码方法，网络节点向终端发送预编码量化结果信息；网络节点接收终端发送的数据流，其中数据流是利用预编码量化结果信息和预编码量化参数信息获得的预编码矩阵进行编码的。上述实现方式中，网络节点根据信道变化动态地为终端配置预编码矩阵，使得终端可以快速适应信道变化并获得一个实时的预编码矩阵，从而减小流间干扰，提升系统容量，同时采用量化的方法发送预编码量化结果，减小信令开销。A second aspect provides a precoding method in a MIMO system, where a network node sends precoding quantization result information to a terminal; the network node receives a data stream sent by the terminal, where the data stream uses precoding quantization result information and precoding quantization parameter information. The obtained precoding matrix is encoded. In the foregoing implementation manner, the network node dynamically configures a precoding matrix for the terminal according to the channel change, so that the terminal can quickly adapt to the channel change and obtain a real-time precoding matrix, thereby reducing inter-stream interference, improving system capacity, and adopting quantization. The method transmits precoding quantization results to reduce signaling overhead.
在第二方面的一种可能的实现方式中，预编码量化结果信息包括如下至少一种信息：量化值，是指预编码矩阵的每个向量的每个元素的实部和虚部的量化值；最大值索引，用于指示预编码矩阵的各列向量的所有元素的最大范数值所在的位置；量化值长度指示，用于指示量化值的比特位数；信息长度，用于指示量化值包含的预编码矩阵的向量的个数和每个列向量的元素的个数，或者指示量化值的总的字节长度。上述可能的实现方式中，通过这些信息中的一种或多组信息的传输，可以实现预编码量化结果信息的高效传输。In a possible implementation manner of the second aspect, the precoding quantization result information includes at least one of the following information: the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix. a maximum value index indicating a position where a maximum norm value of all elements of each column vector of the precoding matrix is located; a quantized value length indication indicating a bit number of the quantized value; and an information length indicating that the quantized value is included The number of vectors of the precoding matrix and the number of elements of each column vector, or the total byte length of the quantized value. In the above possible implementation manner, efficient transmission of pre-coded quantization result information can be achieved by transmission of one or more sets of information.
在第二方面的一种可能的实现方式中，预编码量化结果信息承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中。上述可能的实现方式中，通过特定的信令，可以实现预编码量化结果信息在空口的传输。In a possible implementation manner of the second aspect, the precoding quantization result information is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel (PDCCH) Indicated in the physical downlink shared channel PDSCH. In the foregoing possible implementation manner, the transmission of the pre-coded quantization result information in the air interface can be implemented by using specific signaling.
在第二方面的一种可能的实现方式中，网络节点在向终端发送预编码量化结果信息之前，进一步包括：网络节点向终端发送预编码量化参数信息。上述可能的实现方式中，网络可以根据信道变化情况，为终端配置一个优化的预编码量化参数信息，以提高量化精度，使得终端的预编码最优化，降低干扰，提升系统容量，并降低预编码量化结果信息的传输开销。In a possible implementation manner of the second aspect, before the network node sends the precoding quantization result information to the terminal, the network node further includes: the network node sending the precoding quantization parameter information to the terminal. In the foregoing possible implementation manner, the network may configure an optimized precoding quantization parameter information for the terminal according to the channel change condition, so as to improve the quantization precision, optimize the precoding of the terminal, reduce interference, improve system capacity, and reduce precoding. The transmission overhead of the quantized result information.
在第二方面的一种可能的实现方式中，预编码量化参数信息包括预编码量化参数配置集的信息，或者预编码量化参数配置集索引信息。上述可能的实现方式中，可以实现预编码量化参数信息的灵活传输，可以是预编码量化参数配置集，也可以是预编码量化参数配置集索引。In a possible implementation manner of the second aspect, the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or precoding quantization parameter configuration set index information. In the foregoing possible implementation manner, flexible transmission of precoding quantization parameter information may be implemented, which may be a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
在第二方面的一种可能的实现方式中，预编码量化参数配置集包括如下至少一种信息：量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。In a possible implementation manner of the second aspect, the precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of the quantized value, quantization method indication information, bandwidth indication information, a base vector Instructions.
在第二方面的一种可能的实现方式中，量化值的比特位数信息包括：大于等于量化门限的量化值的比特位数信息，和小于量化门限的量化值的比特位数信息，或者，大于量化门限的量化值的比特位数信息，或者小于等于量化门限的量化值的比特位数信息。In a possible implementation manner of the second aspect, the bit number information of the quantized value includes: bit number information that is greater than or equal to the quantized value of the quantization threshold, and bit number information that is smaller than the quantized value of the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, or bit number information smaller than or equal to the quantization value of the quantization threshold.
在第二方面的一种可能的实现方式中，基向量指示信息包括一个指示基向量的比特映射串(bitmap)和/或基向量长度指示。In a possible implementation of the second aspect, the base vector indication information includes a bit map string and/or a base vector length indication indicating the base vector.
在第二方面的一种可能的实现方式中，预编码量化参数信息承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。上述可能的实现方式中，可以实现预编码量化参数信息在空口的信令传输。In a possible implementation manner of the second aspect, the precoding quantization parameter information is carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling. in. In the above possible implementation manner, signaling transmission of precoding quantization parameter information in an air interface may be implemented.
在第二方面的一种可能的实现方式中，网络节点向终端发送预编码量化参数配置集索引和预编码量化参数配置集的对应关系。上述可能的实现方式中，预编码量化参数信息的配置和修改可以通过预编码量化参数配置集索引来进行，有效降低信令开销。In a possible implementation manner of the second aspect, the network node sends, to the terminal, a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set. In the foregoing possible implementation manner, the configuration and modification of the precoding quantization parameter information may be performed by using a precoding quantization parameter configuration set index, which effectively reduces signaling overhead.
在第二方面的一种可能的实现方式中，量化模式索引和预编码量化参数配置集的对应关系承载在无线资源控制(RRC)信令,或者MAC层控制信令(MAC CE)中。In a possible implementation manner of the second aspect, the correspondence between the quantization mode index and the precoding quantization parameter configuration set is carried in radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE).
在本申请的又一方面，提供了一种终端设备，终端设备用于实现上述第一方面或第一方面的任一种可能的实现方式所提供的MIMO预编码方法中的功能，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上述功能相应的单元。In a further aspect of the present application, a terminal device is provided, which is used to implement the functions in the MIMO precoding method provided by the foregoing first aspect or any possible implementation manner of the first aspect, where the function is It can be implemented by hardware or by software. The hardware or software includes one or more corresponding units of the above functions.
在一种可能的实现方式中，终端设备的结构中包括处理器和存储器，该存储器中存储代码和数据，该存储器与处理器耦合，该处理器被配置为支持该终端设备执行上述第一方面或第一方面的任一种可能的实现方式所提供的数据传输方法。可选的，终端设备还可以包括通信接口和总线，该通信接口通过总线与存储器与处理器连接。In a possible implementation, the structure of the terminal device includes a processor and a memory, where the code stores data and data, and the memory is coupled to the processor, and the processor is configured to support the terminal device to perform the first aspect described above. Or a data transmission method provided by any of the possible implementations of the first aspect. Optionally, the terminal device may further include a communication interface and a bus, and the communication interface is connected to the processor through the bus.
在本申请的又一方面，提供了一种网络设备，网络设备用于实现上述第二方面或第二方面的任一种可能的实现方式所提供的MIMO预编码方法中的功能，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上述功能相应的单元。In a further aspect of the present application, a network device is provided, the network device is configured to implement the functions in the MIMO precoding method provided by the foregoing second aspect or any possible implementation manner of the second aspect, where the function is It can be implemented by hardware or by software. The hardware or software includes one or more corresponding units of the above functions.
在一种可能的实现方式中，网络设备的结构中包括处理器和存储器，该存储器中存储代码和数据，该存储器与处理器耦合，该处理器被配置为支持该终端设备执行上述第二方面或第二方面的任一种可能的实现方式所提供的数据传输方法。可选的，终端设备还可以包括通信接口和总线，该通信接口通过总线与存储器与处理器连接。In a possible implementation, a network device includes a processor and a memory, where the code stores data and data, and the memory is coupled to a processor, and the processor is configured to support the terminal device to perform the foregoing second aspect. Or a data transmission method provided by any of the possible implementations of the second aspect. Optionally, the terminal device may further include a communication interface and a bus, and the communication interface is connected to the processor through the bus.
本申请的又一方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得该计算机执行上述第一方面或第一方面的任一种可能的实现方式所提供的MIMO预编码方法，或者执行上述第二方面或第二方面的任一种可能的实现方式所提供的MIMO预编码方法。A still further aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the first aspect or the first aspect described above The MIMO precoding method provided by any one of the possible implementation manners, or the MIMO precoding method provided by any of the foregoing possible implementation manners of the second aspect or the second aspect.
本申请的又一方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得该计算机执行上述第一方面或第一方面的任一种可能的实现方式所提供的MIMO预编码方法，或者执行上述第二方面或第二方面的任一种可能的实现方式所提供的MIMO预编码方法。In a further aspect of the present application, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the MIMO provided by any of the first aspect or any of the possible implementations of the first aspect A precoding method, or a MIMO precoding method provided by any of the above possible implementations of the second aspect or the second aspect.
本申请的又一方面，提供一种通信系统，该通信系统包括多个设备，该多个设备包括：一个网络设备以及至少一个终端设备。其中，终端设备为上述各方面所提供的终端设备，用于支持终端设备执行上述第一方面或第一方面的任一种可能的实现方式所提供的MIMO预编码方法；网络设备为上述各方面所提供的网络设备，用于支持网络设备执行上述第二方面或第二方面的任一种可能的实现方式所提供的MIMO预编码方法。In still another aspect of the present application, a communication system is provided, the communication system comprising a plurality of devices, the plurality of devices comprising: a network device and at least one terminal device. The terminal device is the terminal device provided by the foregoing aspects, and is used to support the terminal device to perform the MIMO precoding method provided by the foregoing first aspect or any possible implementation manner of the first aspect; the network device is the foregoing aspects. The provided network device is configured to support the network device to perform the MIMO precoding method provided by the foregoing second aspect or any possible implementation manner of the second aspect.
可以理解，上述提供的任一种MIMO预编码方法的装置、计算机存储介质或者计算机程序产品均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文所提供的对应的方法中的有益效果，此处不再赘述。It can be understood that the apparatus, computer storage medium or computer program product of any of the MIMO pre-coding methods provided above is used to perform the corresponding method provided above, and therefore, the beneficial effects that can be achieved can be referred to the above. The beneficial effects in the corresponding methods provided are not described here.
附图说明DRAWINGS
图1为本发明实施例提供的上行MIMO的预编码系统示意图；FIG. 1 is a schematic diagram of an uplink MIMO precoding system according to an embodiment of the present disclosure;
图2为本发明实施例提供的一种预编码方法的流程示意图；2 is a schematic flowchart of a precoding method according to an embodiment of the present invention;
图3为本发明实施例提供的预编码量化参数配置集编码格式示意图；FIG. 3 is a schematic diagram of a coding format of a precoding quantization parameter configuration set according to an embodiment of the present disclosure;
图4为本发明实施例提供的非均匀量化值信息格式示意图；4 is a schematic diagram of a non-uniform quantized value information format according to an embodiment of the present invention;
图5为本发明实施例提供的另一种非均匀量化值信息格式示意图；FIG. 5 is a schematic diagram of another non-uniform quantized value information format according to an embodiment of the present disclosure;
图6为本发明实施例提供的比特映射量化值的信息格式示意图；FIG. 6 is a schematic diagram of an information format of a bit map quantization value according to an embodiment of the present disclosure;
图7为本发明实施例提供的另一种比特映射量化值的信息格式示意图；FIG. 7 is a schematic diagram of an information format of another bit map quantization value according to an embodiment of the present disclosure;
图8为本发明实施例提供的终端的一种可能的结构示意图；FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;
图9为本发明实施例提供的终端的一种可能的逻辑结构示意图；FIG. 9 is a schematic diagram of a possible logical structure of a terminal according to an embodiment of the present disclosure;
图10为本发明实施例提供的基站的一种可能的结构示意图；FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;
图11为本发明实施例提供的基站的一种可能的逻辑结构示意图。FIG. 11 is a schematic diagram of a possible logical structure of a base station according to an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案、及优点更加清楚，下面结合附图并举实施例，对本发明提供的技术方案作进一步详细描述。In order to make the objects, technical solutions, and advantages of the present invention more comprehensible, the technical solutions provided by the present invention are further described in detail below with reference to the accompanying drawings.
图1为本申请实施例提供的上行MIMO的预编码系统示意图。上行MIMO预编码系统可以是一个更大的无线通信系统的一部分，图1仅示出与本发明相关的功能模块。在图1所示的系统中，至少包括一个基站(英文全称：Base Station，英文简称：BS)100和一个或多个UE。在图1中，以示例的形式，显示UE110,UE120和UE130，系统也可以包含其他数量的UE。这里以包含三个UE为例进行说明。所述UE110-130可以是静止或移动设备。例如移动设备可以是移动电话，智能终端，平板电脑(tablet)，笔记本电脑(laptop)，视频游戏控制台，多媒体播放器等。静止设备通常位于固定位置，如计算机，接入点(通过无线链路连接到网络)等。所述基站100可以是LTE的演进基站(英文全称：E-UTRAN NodeB，英文简称：eNB)，或者下一代基站(英文全称：next generation NodeB，英文简称：gNB)，或者是接入点设备以及任何接入UE设备的网络设备。FIG. 1 is a schematic diagram of an uplink MIMO precoding system according to an embodiment of the present disclosure. The uplink MIMO precoding system may be part of a larger wireless communication system, and Figure 1 shows only the functional modules associated with the present invention. In the system shown in FIG. 1, at least one base station (English name: Base Station, BS for short) 100 and one or more UEs are included. In FIG. 1, UE 110, UE 120 and UE 130 are shown by way of example, and the system may also include other numbers of UEs. Here, the description includes three UEs as an example. The UEs 110-130 may be stationary or mobile devices. For example, the mobile device can be a mobile phone, a smart terminal, a tablet, a laptop, a video game console, a multimedia player, and the like. Stationary devices are usually located in fixed locations, such as computers, access points (connected to the network via wireless links), and so on. The base station 100 may be an LTE evolved base station (English full name: E-UTRAN NodeB, English abbreviation: eNB), or a next generation base station (English name: next generation NodeB, English abbreviation: gNB), or an access point device and Any network device that accesses the UE device.
基站100与UE110-130进行通信，UE110-130向基站发送SRS，基站100通过SRS进行信道估计，根据信道估计结果，生成UE110-130的预编码量化参数信息，并将生成的预编码量化参数信息110-130通过空口配置给UE110-130。通常在UE110-130发送数据之前，基站100需要为UE110-130完成预编码量化参数信息的配置。在通信过程中，基站100通过不断对UE110-130发送的SRS进行测量获得UE110-130的信道变化情况。基站100根据监测到的信道变化情况确定是否要改变UE110-130的预编码矩阵，如果确定需要改变UE110-130的预编码矩阵，则向UE110-130发送预编码量化结果信息，使得UE110-130根据发送的预编码量化结果信息以及配置的预编码量化参数信息重新获得新的预编码矩阵以适应信道变化的要求。通过预编码量化结果信息可以为UE110-130提供适应信道状态变化的预编码，从而降低流间干扰。由于UE的移动，或者临近UE数的变化，以及空口信道的传播特性等因素，UE在移动过程中，由于信道特性的变化，UE需要根据信道特性以调整预编码矩阵。传统的采用固定码本的预编码，不能准确反应UE信道状况，尤其在UE数较多的情况下，存在不同流间的信道相互干扰，因而，选择的预编码矩阵不能适应当前的信道状况。The base station 100 communicates with the UEs 110-130, and the UE 110-130 transmits an SRS to the base station. The base station 100 performs channel estimation through the SRS, generates precoding quantization parameter information of the UE 110-130 according to the channel estimation result, and generates the generated precoding quantization parameter information. 110-130 is configured to the UE 110-130 through the air interface. The base station 100 needs to complete the configuration of the precoding quantization parameter information for the UEs 110-130 before the UE 110-130 transmits the data. During the communication process, the base station 100 obtains the channel change of the UE 110-130 by continuously measuring the SRS transmitted by the UE 110-130. The base station 100 determines whether to change the precoding matrix of the UE 110-130 according to the monitored channel change condition. If it is determined that the precoding matrix of the UE 110-130 needs to be changed, the precoding quantization result information is sent to the UE 110-130, so that the UE 110-130 is configured according to the UE 110-130. The transmitted precoding quantization result information and the configured precoding quantization parameter information re-obtain a new precoding matrix to accommodate the channel change requirement. Precoding of the channel state changes can be provided to the UEs 110-130 by precoding the quantized result information, thereby reducing inter-stream interference. Due to the movement of the UE, or the change of the number of adjacent UEs, and the propagation characteristics of the air interface channel, the UE needs to adjust the precoding matrix according to the channel characteristics due to the change of the channel characteristics during the mobile process. The conventional precoding using a fixed codebook cannot accurately reflect the channel condition of the UE. Especially in the case of a large number of UEs, there are channels inter-channel interference between different streams. Therefore, the selected precoding matrix cannot adapt to the current channel condition.
为适应信道变化而采用适应信道变化的预编码矩阵会使得预编码矩阵相对传统预编码方案来说是动态变化的，动态变化会造成由于需要传输预编码矩阵信息而带来开销，为了降低开销，需要对预编码矩阵信息进行压缩。预编码矩阵信息主要是基站100根据对UE110-130的SRS测量的结果而为UE110-130确定的构成预编码矩阵的每个向量的各个元素的值。通过对构成预编码矩阵的每个向量的各元素的值进行量化是一种压缩预编码矩阵信息传输的有效手段。预编码量化参数信息为量化提供量化依据。In order to adapt to the channel change, the precoding matrix adapted to the channel variation is used to make the precoding matrix dynamically change with respect to the traditional precoding scheme. The dynamic change causes overhead due to the need to transmit the precoding matrix information, and in order to reduce overhead, The precoding matrix information needs to be compressed. The precoding matrix information is mainly the value of each element of each vector constituting the precoding matrix determined by the base station 100 for the UE 110-130 based on the result of the SRS measurement on the UEs 110-130. Quantizing the values of the elements of each vector constituting the precoding matrix is an effective means of compressing the information of the precoding matrix information. The precoding quantization parameter information provides a quantitative basis for quantization.
上述预编码量化参数信息是一组为量化提供量化依据而设定的参数，在基站100侧，预编码量化参数信息为构成预编码矩阵的每个向量的各元素提供量化依据，在UE110-130侧， 预编码量化参数信息为恢复预编码矩阵的每个向量的各元素提供解量化依据。基站100在向UE110-130发送预编码量化结果信息之前，为UE110-130配置预编码量化参数信息。The precoding quantization parameter information is a set of parameters set for providing quantization basis for quantization. On the base station 100 side, the precoding quantization parameter information provides a quantization basis for each element of each vector constituting the precoding matrix, at the UE 110-130. On the side, the precoding quantization parameter information provides a dequantization basis for each element of each vector of the restoration precoding matrix. The base station 100 configures precoding quantization parameter information for the UEs 110-130 before transmitting the precoding quantized result information to the UEs 110-130.
所述预编码量化参数信息包括预编码量化参数配置集的信息，或预编码量化参数配置集索引。预编码量化参数配置集包括一组预编码量化参数。预编码量化参数配置集包括以下信息中至少一项：量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index. The precoding quantization parameter configuration set includes a set of precoding quantization parameters. The precoding quantization parameter configuration set includes at least one of the following information: information of a quantization threshold, bit number information of a quantized value, quantization method indication information, bandwidth indication information, base vector indication information.
其中，量化值的比特位数信息用于表示量化值的二进制比特位数，可以有多个量化值的比特位数信息，每个量化值的比特位数信息分别对应一个量化区间的量化值的二进制比特位数的信息，不同量化区间的量化值的比特位数信息可以相同，也可以不同。量化区间是指以量化门限的信息将一个数值范围划分为连续且互相不重叠的不同的集合空间，连续表示其中的一个集合包含量化门限的信息。例如，假定一个量化门限的信息为T，且0<T<1,那么T将实数[0,1]划分为两个量化区间，其中符号[]表示闭区间，包含0和1的实数集合，T将[0,1]的集合划分成量化空间[0,T)及[T,1]，或者，[0,T]及(T,1],其中[0,T)和(T,1]分别表示半闭半开区间和半开半闭区间，即大于等于0且小于T，以及大于T且小于等于1，这是一般的数学区间的表示方法，本申请认为区间的概念已为本领域普通技术人员所熟知，不再详细阐述。当只有一个量化门限的信息时，包括大于等于量化门限的量化值的比特位数信息，和小于量化门限的量化值的比特位数信息，或者，大于量化门限的量化值的比特位数信息，和小于等于量化门限的量化值的比特位数信息。当有多个量化门限的信息时，比如k个量化门限的信息，就会有(k+1)个量化值的比特位数信息，各量化区间范围遵从上述区间划分方法，即连续且互相不重叠的不同的集合空间，各个区间的量化值的比特位数可以相同，也可以不同，即多个量化值的比特位数信息可以相同，也可以不同。The bit number information of the quantized value is used to represent the bit number of the quantized value, and the bit number information of the plurality of quantized values may be used, and the bit bit information of each quantized value respectively corresponds to the quantized value of the quantized interval. The information of the binary bit number, the bit number information of the quantized value of different quantization intervals may be the same or different. The quantization interval refers to dividing the value range into different collection spaces that are continuous and do not overlap each other by the information of the quantization threshold, and continuously indicates that one of the sets contains the information of the quantization threshold. For example, assuming that the information of a quantization threshold is T, and 0<T<1, then T divides the real number [0, 1] into two quantization intervals, where the symbol [] represents a closed interval, a set of real numbers including 0 and 1. T divides the set of [0, 1] into quantization spaces [0, T) and [T, 1], or, [0, T] and (T, 1], where [0, T) and (T, 1) ] respectively denotes a semi-closed half-open interval and a half-open half-closed interval, that is, greater than or equal to 0 and less than T, and greater than T and less than or equal to 1, which is a representation of a general mathematical interval, and the present application considers the concept of the interval to be It is well known to those skilled in the art and will not be described in detail. When there is only one information of the quantization threshold, the bit number information including the quantized value of the quantization threshold and the bit number information of the quantized value smaller than the quantization threshold, or Bit number information larger than the quantization value of the quantization threshold, and bit number information smaller than or equal to the quantization value of the quantization threshold. When there are multiple quantization threshold information, such as k quantization threshold information, there is (k+ 1) bit number information of quantized values, each quantized interval range follows the above-described interval dividing method, that is, continuous The different sets of spaces that do not overlap each other may have the same or different bit numbers of the quantized values of the respective intervals, that is, the bit number information of the plurality of quantized values may be the same or different.
预编码量化参数配置集索引是用于表示预编码量化参数配置集的索引信息。当存在预编码量化参数配置集索引时，预编码量化参数配置集索引和预编码量化参数配置集之间具有对应关系，通过预编码量化参数配置集索引可以获得预编码量化参数配置集的信息。通常，当存在预编码量化参数配置集索引时，基站100为UE110-130配置预编码量化参数信息时，通过预编码量化参数配置集索引来进行配置。此时，通常在基站100为UE110-130指配预编码量化参数配置集索引之前，为UE110-130配置多组预编码量化参数配置集，且每组预编码量化参数配置集对应一个预编码量化参数配置集索引。在另一种可选方案中，多组预编码量化参数配置集是预定义的，基站100在为UE110-130指配预编码量化参数配置集索引之前，不需要向UE110-130配置多组预编码量化配置集的信息，此时基站100和UE110-130都预存预定义的预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系。基站100为UE110-130配置预编码量化参数配置集索引，UE110-130用接收到的预编码量化参数配置集索引通过预存的预定义的预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系就可以获得一组特定的预编码量化参数配置集的信息。在另一种可选方案中，基站100也可以直接为UE110-130配置一组量化参数配置集。The precoding quantization parameter configuration set index is index information for indicating a precoding quantization parameter configuration set. When there is a precoding quantization parameter configuration set index, the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set have a correspondence relationship, and the information of the precoding quantization parameter configuration set can be obtained by using the precoding quantization parameter configuration set index. Generally, when there is a precoding quantization parameter configuration set index, when the base station 100 configures the precoding quantization parameter information for the UE 110-130, the base station 100 performs configuration by precoding the quantization parameter configuration set index. At this time, before the base station 100 assigns the precoding quantization parameter configuration set index to the UE 110-130, the UE 110-130 is configured with multiple sets of precoding quantization parameter configuration sets, and each set of precoding quantization parameter configuration sets corresponds to one precoding quantization. Parameter configuration set index. In another alternative, the plurality of sets of precoding quantization parameter configuration sets are predefined, and the base station 100 does not need to configure multiple sets of pre-configurations to the UE 110-130 before assigning the UE 110-130 a precoding quantization parameter configuration set index. The information of the quantization configuration set is encoded. At this time, both the base station 100 and the UEs 110-130 pre-store the correspondence between the predefined precoding quantization parameter configuration set index and the precoding quantization parameter configuration set. The base station 100 configures a precoding quantization parameter configuration set index for the UE 110-130, and the UE 110-130 uses the pre-stored pre-predefined quantization parameter configuration set index and the pre-coding quantization parameter configuration set by using the received pre-coding quantization parameter configuration set index. The correspondence between the two sets of specific precoding quantization parameter configuration sets can be obtained. In another alternative, base station 100 can also configure a set of quantization parameter configurations directly for UEs 110-130.
量化方法指示信息主要用于指示量化方法，不同的量化方法得到的预编码量化结果信息不同，当仅支持一种量化方法时，量化方法指示信息不是必须的。带宽指示信息用于指示当前量化针对部分带宽还是全带宽。The quantization method indication information is mainly used to indicate the quantization method, and the precoding quantization result information obtained by different quantization methods is different. When only one quantization method is supported, the quantization method indication information is not necessary. The bandwidth indication information is used to indicate whether the current quantization is for a partial bandwidth or a full bandwidth.
基向量指示信息包括一个指示基向量的比特映射串(bitmap)和/或基向量长度指示。基向量指示信息跟量化方法相关，仅用于比特映射量化方法。其中比特映射串(bitmap)用于指定基向量。基向量长度指示用于给定基向量中元素的个数。如果给定的基向量的元素个数都相同， 那么基向量长度指示不是必须的。优选地，基向量都是预定义的，此时基站100和UE110-130都预存基向量在设备中。在一种可选方案中，如果基向量不是预定义的，由于基向量数量一般会比较多，因此，基站100在为UE110-130配置预编码量化参数信息之前，还需要为UE配置基向量集合，基向量集合包括至少一个基向量。The base vector indication information includes a bit map string and/or base vector length indication indicating the base vector. The base vector indication information is related to the quantization method and is only used for the bit mapping quantization method. The bit map string is used to specify the base vector. The base vector length indicates the number of elements used in a given base vector. If the number of elements of a given base vector are the same, the base vector length indication is not necessary. Preferably, the base vectors are all predefined, in which case both the base station 100 and the UEs 110-130 pre-store the base vectors in the device. In an alternative, if the base vector is not predefined, since the number of base vectors is generally more, the base station 100 needs to configure the base vector set for the UE before configuring the precoding quantization parameter information for the UE 110-130. The set of base vectors includes at least one basis vector.
以上参数并不是每一项都是必须的，根据不同的量化方法和配置场景，包含的内容可能并不一样。预编码量化参数信息可能并不需要频繁变化，因此，其配置并不需要完全动态，可以是半静态的配置，即，在需要重新配置的时候才进行重新配置，例如，信道状态由于UE环境的变化出现了极大的不同时，对预编码量化参数信息进行重新配置。Not all of the above parameters are required. Depending on the different quantization methods and configuration scenarios, the content may not be the same. The precoding quantization parameter information may not need to be changed frequently, and therefore, its configuration does not need to be completely dynamic, and may be a semi-static configuration, that is, reconfiguration is performed when reconfiguration is required, for example, the channel state is due to the UE environment. When the changes are greatly different, the precoding quantization parameter information is reconfigured.
在上述信道变化过程中，基站100通过信道测量，获得预编码矩阵后，根据上述预编码量化参数信息对预编码矩阵中每个向量的每个元素进行量化，得到每个元素的量化值，从而得到预编码量化结果信息。预编码量化结果信息包括如下至少一种信息：量化值，最大值索引，量化值长度指示，信息长度。其中，量化值是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；最大值索引用于指示所述预编码矩阵的各向量的所有元素的最大范数值所在的位置；量化值长度指示包括实部长度指示和虚部长度指示，用于指示所述量化值的比特位数信息；信息长度用于指示所述量化值包含的所述预编码矩阵的所述向量的个数和每个所述向量的元素的个数，或者指示所述量化值的总的字节长度。In the above channel change process, the base station 100 obtains a precoding matrix by channel measurement, and quantizes each element of each vector in the precoding matrix according to the precoding quantization parameter information to obtain a quantized value of each element, thereby The precoded quantized result information is obtained. The precoding quantized result information includes at least one of the following information: a quantized value, a maximum value index, a quantized value length indication, and an information length. Wherein the quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix; a maximum value index is used to indicate a maximum norm value of all elements of each vector of the precoding matrix a location where the quantized value length indication includes a real part length indication and an imaginary part length indication for indicating bit number information of the quantized value; and the information length is used to indicate that the quantized value includes the precoding matrix The number of vectors and the number of elements of each of the vectors, or the total byte length of the quantized values.
为了获得预编码量化参数信息和预编码量化结果信息，基站100和UE110-130要具有相应的功能。图1示出了基站100和UE110-130预编码相关的主要功能。需要说明的是，图1中并没有给出基站100的数据接收功能，以接收UE110-130用获得的预编码矩阵进行预编码所发送的数据流，应理解，这是通常的数据接收功能，因此，本申请认为作为本领域的一般技术人员，应理解这是一个基本功能，图1中没有给出基站100接收UE110-130采用预编码矩阵发送的数据的接收功能，但该功能是存在的。In order to obtain precoding quantization parameter information and precoding quantization result information, the base station 100 and the UEs 110-130 have corresponding functions. Figure 1 shows the main functions associated with base station 100 and UE 110-130 precoding. It should be noted that the data receiving function of the base station 100 is not shown in FIG. 1 to receive the data stream sent by the UE 110-130 by using the obtained precoding matrix for precoding. It should be understood that this is a normal data receiving function. Therefore, the present application is considered to be a basic function as a person of ordinary skill in the art. FIG. 1 does not show the receiving function of the base station 100 receiving the data transmitted by the UE 110-130 using the precoding matrix, but the function is present. .
图1中，在基站侧，信道估计101通过对UE110-130发送的SRS进行测量，并对UE110-130的信道进行估计。通过信道估计可以获得信道的状态信息。这与传统的信道估计没有差异，不再赘述。In FIG. 1, on the base station side, the channel estimation 101 measures the SRS transmitted by the UEs 110-130 and estimates the channels of the UEs 110-130. The state information of the channel can be obtained by channel estimation. This is no different from the traditional channel estimation and will not be described again.
预编码量化参数信息生成与配置功能102主要包括两个功能：一是根据信道估计101的结果，为UE110-130确定预编码量化参数信息，二是将预编码量化参数信息配置给UE110-130。为UE110-130配置预编码量化参数信息包括两个方面，一方面，为UE110-130指配一个预编码量化参数配置集的信息，另一方面，如前所述，102也可以为UE110-130配置多组预编码量化参数配置集的信息，多个预编码参数配置集的信息可能不是根据当前的测量结果，而是根据对UE110-130的信道测量长期统计而生成的多组可行的预编码量化参数配置集的信息。在一种可选方案中，当多组预编码量化参数配置集是预定义的时候，基站100不必为UE110-130配置预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系，此时，预编码量化参数信息生成与配置功能102还应当包括预存预定义的预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系。预编码量化结果信息生成103主要是根据信道估计的结果。比如，信道状态出现了变化并导致接收信号质量下降到一定的范围，基站100可以重新生成预编码量化结果信息以匹配新的信道状态。预编码量化结果信息是通过预编码量化参数信息对构成预编码矩阵的每个向量的元素进行量化的结果。The precoding quantization parameter information generation and configuration function 102 mainly includes two functions: one is to determine precoding quantization parameter information for the UE 110-130 according to the result of the channel estimation 101, and the second is to configure the precoding quantization parameter information to the UE 110-130. The configuration of the precoding quantization parameter information for the UE 110-130 includes two aspects. On one hand, the UE 110-130 is assigned a precoding quantization parameter configuration set information. On the other hand, as described above, the 102 may also be the UE 110-130. The information of the multiple sets of precoding quantization parameter configuration sets is configured, and the information of the multiple precoding parameter configuration sets may not be based on current measurement results, but multiple sets of feasible precodings generated according to long-term statistics of channel measurements of the UEs 110-130 Quantize information about a parameter configuration set. In an alternative, when the plurality of sets of precoding quantization parameter configuration sets are predefined, the base station 100 does not have to configure the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the UE 110-130. At this time, the precoding quantization parameter information generation and configuration function 102 should further include a pre-stored correspondence between the pre-defined pre-coding quantization parameter configuration set index and the pre-coding quantization parameter configuration set. The precoding quantized result information generation 103 is mainly based on the result of the channel estimation. For example, if the channel state changes and the received signal quality drops to a certain range, the base station 100 can regenerate the precoded quantization result information to match the new channel state. The precoding quantization result information is a result of quantizing elements of each vector constituting the precoding matrix by precoding quantization parameter information.
在UE110-130中，111,121，131首先获取预编码量化参数信息，并保存预编码量化参数信息。获取预编码量化参数信息包括两方面，一方面是接收基站100指配的预编码量化参数信息，可以是通过预编码量化参数配置集索引配置的，也可以是直接配置预编码量化参数配 置集的信息；另一方面，获取预编码量化参数信息还包括在获取基站100配置的预编码量化参数信息之前，从基站100获得预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系，或者，预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系是预定义的，则UE110-130的预编码量化参数信息获取111,121，131还应包括预存预定义的预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系。In the UE 110-130, 111, 121, 131 first acquires precoding quantization parameter information, and saves precoding quantization parameter information. Obtaining the precoding quantization parameter information includes two aspects. The first aspect is that the precoding quantization parameter information that is received by the receiving base station 100 may be configured by using a precoding quantization parameter configuration set index, or may be directly configuring a precoding quantization parameter configuration set. Information; on the other hand, obtaining the precoding quantization parameter information further includes obtaining, from the base station 100, a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set before acquiring the precoding quantization parameter information configured by the base station 100. Or, the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is predefined, and the precoding quantization parameter information acquisition 111, 121, 131 of the UE 110-130 should also include pre-preserving the predefined precoding. A correspondence between the quantization parameter configuration set index and the precoding quantization parameter configuration set.
112,122，132从基站100接收预编码量化结果信息，以获得最新的构成预编码矩阵的每个向量的元素的量化结果。112, 122, 132 receive precoding quantized result information from the base station 100 to obtain the latest quantized result of the elements of each vector constituting the precoding matrix.
113,123，133根据接收的预编码量化参数信息和预编码量化结果信息对构成预编码矩阵的元素进行恢复，即解量化过程，从而恢复预编码矩阵。113, 123, 133 recovers, ie, dequantizes, the elements constituting the precoding matrix according to the received precoding quantization parameter information and the precoding quantization result information, thereby restoring the precoding matrix.
114,124，134根据最新生成的预编码矩阵对发送的上行数据进行预编码，并进行数据发送。基站100接收UE110-130发送的数据流，所述数据流是UE110-130利用预编码量化结果信息和预编码量化参数信息获得的预编码矩阵进行编码的。114, 124, 134 pre-encodes the transmitted uplink data according to the newly generated precoding matrix, and performs data transmission. The base station 100 receives the data stream transmitted by the UE 110-130, which is encoded by the UE 110-130 using a precoding matrix obtained by precoding quantization result information and precoding quantization parameter information.
在本发明实施例中，通过基站100为UE110-130配置预编码量化参数信息和预编码量化结果信息，可以实现动态预编码以适应信道变化，减小流间干扰，提升系统容量。通过预编码量化参数信息和预编码量化结果信息的分开发送，降低空口信令开销。In the embodiment of the present invention, the base station 100 configures precoding quantization parameter information and precoding quantization result information for the UE 110-130, so that dynamic precoding can be implemented to adapt to channel changes, reduce inter-stream interference, and improve system capacity. The air interface signaling overhead is reduced by separately transmitting the precoding quantization parameter information and the precoding quantization result information.
图2为本申请实施例提供的一种预编码方法的流程示意图。参见图2，该方法应用于图1所示的预编码系统中，应理解，图中选用终端110仅是一个示例，可以为任何基站100服务的终端，这里只是为了说明的需要，在后续所有使用的终端110都可以是任何一个基站100服务的终端，不再赘述。该方法包括以下几个步骤。FIG. 2 is a schematic flowchart diagram of a precoding method according to an embodiment of the present application. Referring to FIG. 2, the method is applied to the precoding system shown in FIG. 1. It should be understood that the terminal 110 in the figure is only an example and can be used for any base station 100. Here, for the sake of explanation, all subsequent The terminal 110 used may be any terminal served by the base station 100, and details are not described herein. The method includes the following steps.
步骤201、基站100生成预编码量化结果信息并发送给终端110。UE接收基站发送的上述确定的预编码量化结果信息。Step 201: The base station 100 generates precoding quantization result information and sends it to the terminal 110. The UE receives the determined precoding quantization result information sent by the base station.
基站100对终端110发送的SRS信号进行测量，并获得一个预编码矩阵，根据预编码矩阵，生成预编码量化结果信息。The base station 100 measures the SRS signal sent by the terminal 110, and obtains a precoding matrix, and generates precoding quantization result information according to the precoding matrix.
具体地，基站100通过无线资源控制(英文全称：Radio Resource Control，英文简称：RRC)信令，或者MAC英文全称：Medium Access Control，英文简称：MAC)层控制信令(英文全称：MAC Control Element，英文简称：MAC CE)，或者物理下行链路控制信道(英文全称：Physical Downlink Control CHannel，英文简称：PDCCH)指示的物理下行共享信道(英文全称：Physical Downlink Sharing CHannel，英文简称：PDSCH)将预编码量化结果信息发送给终端110。对应的，UE通过对应的方式接收基站通过上述发送方式发送的预编码量化结果信息，即，预编码量化结果信息是承载在其中的一个消息中的，具体采用哪个消息进行发送由协议定义，本实施例不做规定。Specifically, the base station 100 uses radio resource control (English full name: Radio Resource Control, English abbreviation: RRC) signaling, or MAC full name: Medium Access Control, English abbreviation: MAC) layer control signaling (English full name: MAC Control Element , English abbreviation: MAC CE), or physical downlink shared channel (English full name: Physical Downlink Control CHannel, English abbreviation: PDCCH) indicated physical downlink shared channel (English full name: Physical Downlink Sharing CHannel, English abbreviation: PDSCH) The precoding quantized result information is transmitted to the terminal 110. Correspondingly, the UE receives the precoding quantization result information sent by the base station by using the foregoing sending manner in a corresponding manner, that is, the precoding quantization result information is carried in one of the messages, and specifically, which message is used for transmission is defined by the protocol, The embodiment does not make provisions.
步骤202、终端110根据收到的预编码量化结果信息和预编码量化参数信息确定预编码矩阵。Step 202: The terminal 110 determines a precoding matrix according to the received precoding quantization result information and precoding quantization parameter information.
具体的确定预编码矩阵的过程将在后面详细阐述。The specific process of determining the precoding matrix will be described in detail later.
具体地，为了使得终端110在收到预编码量化参数结果信息后可以获得预编码矩阵，终端110在接收到预编码量化结果信息之前，还进一步包括获取预编码量化参数信息。将获得的预编码量化参数信息用于对接收的预编码量化结果信息进行解量化，从而获得预编码矩阵。Specifically, in order to enable the terminal 110 to obtain a precoding matrix after receiving the precoding quantization parameter result information, the terminal 110 further includes acquiring precoding quantization parameter information before receiving the precoding quantization result information. The obtained precoding quantization parameter information is used to dequantize the received precoding quantization result information, thereby obtaining a precoding matrix.
在一种可选的方案中，上述获取预编码量化参数信息可以是终端110接收基站100发送的预编码量化参数信息，预编码量化参数信息包括预编码量化参数配置集的信息，或预编码 量化参数配置集索引。基站100通过物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令将预编码量化参数信息发送给终端110，即预编码量化参数信息承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。对应的，终端通过对应的方式接收基站通过上述发送方式发送的预编码量化参数信息。终端110在接收预编码量化结果信息之前，首先需要从基站获得预编码量化参数信息。在某些情况下，预编码量化参数信息是和预编码量化结果信息一起传输给UE的，可以是通过同一条消息，也可以是通过不同的消息，比如通过同一条消息的不同的MAC CE来同时传输预编码量化结果信息和预编码量化参数信息。应理解，预编码量化参数信息和预编码量化结果不必同时发送给终端110，同时发送给终端110是指每次预编码量化结果的接收都会伴随预编码量化参数信息的接收，因为预编码量化参数信息的变化可能没有预编码量化结果信息的变化那么频繁，并不是每次生成一个新的预编码量化结果信息都会伴随预编码量化参数信息的变化，一个预编码量化参数配置集可能在很长一段时间内没有变化，而预编码量化结果信息则发生频繁变化。In an optional solution, the obtaining the precoding quantization parameter information may be that the terminal 110 receives the precoding quantization parameter information sent by the base station 100, and the precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or precoding quantization. Parameter configuration set index. The base station 100 transmits precoding quantization parameter information to the terminal 110 through a physical downlink control channel (PDCCH), or MAC layer control signaling (MAC CE), or radio resource control (RRC) signaling, that is, precoding quantization parameter information. The bearer is carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling. Correspondingly, the terminal receives the precoding quantization parameter information sent by the base station by using the foregoing sending manner in a corresponding manner. Before receiving the precoding quantization result information, the terminal 110 first needs to obtain precoding quantization parameter information from the base station. In some cases, the precoding quantization parameter information is transmitted to the UE together with the precoding quantization result information, which may be through the same message, or may be through different messages, such as different MAC CEs of the same message. The precoding quantization result information and the precoding quantization parameter information are simultaneously transmitted. It should be understood that the precoding quantization parameter information and the precoding quantization result are not necessarily transmitted to the terminal 110 at the same time, and the transmission to the terminal 110 means that the reception of the precoding quantization result is accompanied by the reception of the precoding quantization parameter information, because the precoding quantization parameter The change of information may not be as frequent as the change of the precoding quantization result information. Not every time a new precoding quantization result information is generated, the precoding quantization parameter information is changed. A precoding quantization parameter configuration set may be a long period of time. There is no change in time, and the precoding quantized result information changes frequently.
上述预编码量化参数信息同样用于步骤201中基站100生成预编码量化结果信息。基站100根据确定的预编码量化参数信息，使用预编码量化参数信息给定的预编码量化参数配置集来生成预编码量化结果信息。The precoding quantization parameter information described above is also used in step 201 to generate precoding quantization result information by the base station 100. The base station 100 generates precoding quantized result information using the precoding quantization parameter configuration set given by the precoding quantization parameter information according to the determined precoding quantization parameter information.
步骤203、终端110根据上述确定的预编码矩阵对数据流进行预编码并发送。在基站100，接收终端110利用所述预编码矩阵进行编码的数据流。Step 203: The terminal 110 pre-codes and transmits the data stream according to the determined pre-coding matrix. At the base station 100, the receiving terminal 110 uses the precoding matrix to encode the data stream.
通过本发明实施例，可以实现基站和终端间的预编码参数信息和预编码量化结果信息的交互，使得终端可以动态改变预编码矩阵，适应信道变化，减小流间干扰。同时，通过量化，使得空口传输的消息被压缩，降低信令开销。With the embodiment of the present invention, the interaction between the precoding parameter information and the precoding quantization result information between the base station and the terminal can be implemented, so that the terminal can dynamically change the precoding matrix, adapt to channel changes, and reduce inter-stream interference. At the same time, by quantification, the message transmitted by the air interface is compressed, and the signaling overhead is reduced.
进一步的，在终端110从基站100获得预编码量化参数信息之前，即基站100将确定的预编码量化参数信息发送给终端110之前，该方法还包括：Further, before the terminal 110 obtains the pre-coded quantization parameter information from the base station 100, that is, before the base station 100 sends the determined pre-coding quantization parameter information to the terminal 110, the method further includes:
基站100为终端110配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系。基站为终端配置多组预编码量化参数配置集，一个预编码量化参数配置集索引唯一对应一个预编码量化参数配置集。当基站100为终端110配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系时，基站100在为终端110配置预编码量化参数信息时，仅需要指定一个预编码量化参数配置集索引，终端110根据预编码量化参数配置集索引以及预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取预编码量化参数配置集的信息。预编码量化参数配置集索引和预编码量化参数配置集的对应关系承载在无线资源控制(RRC)信令,或者MAC层控制信令(MAC CE)中。在一种可选的方案中，预编码量化参数配置集索引和预编码量化参数配置集的对应关系是预设的，此时，基站100无需通过空口配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系，而是在基站100和终端110中都预存预编码量化参数配置集索引和预编码量化参数配置集的对应关系，基站100在为终端110配置预编码量化参数信息时，仅需要指定一个预编码量化参数配置集索引，终端110根据预设的预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取预编码量化参数配置集的信息。The base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110. The base station configures a plurality of sets of precoding quantization parameter configuration sets for the terminal, and a precoding quantization parameter configuration set index uniquely corresponds to a precoding quantization parameter configuration set. When the base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110, the base station 100 only needs to specify one precoding quantization parameter configuration set when configuring the precoding quantization parameter information for the terminal 110. Indexing, the terminal 110 acquires information of the precoding quantization parameter configuration set according to the precoding quantization parameter configuration set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set. The correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is carried in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE). In an optional solution, the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset. In this case, the base station 100 does not need to configure the precoding quantization parameter configuration set index and precoding through the air interface. The corresponding relationship between the parameter configuration set is quantized, and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is pre-stored in both the base station 100 and the terminal 110, and the base station 100 is configured to configure the precoding quantization parameter information for the terminal 110. Only one precoding quantization parameter configuration set index needs to be specified, and the terminal 110 acquires information of the precoding quantization parameter configuration set according to the preset correspondence between the preset precoding quantization parameter configuration set index and the precoding quantization parameter configuration set.
通过基站为终端配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系，可以减小预编码量化参数信息的开销，使得仅配置预编码量化参数配置集索引即可为终端110配置一组预编码量化配置集。如果预编码量化参数配置集索引和预编码量化参数配置集的对 应关系是预设的，将极大降低空口信令开销。The base station configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set by the base station, so that the overhead of the precoding quantization parameter information can be reduced, so that only the precoding quantization parameter configuration set index can be configured to configure the terminal 110. A set of precoding quantization configuration sets. If the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, the air interface signaling overhead will be greatly reduced.
图3为本申请实施例提供的预编码量化参数配置集编码格式示意图。如前所述，预编码量化参数信息包括以下信息中的至少一种：量化门限的信息301，量化值的比特位数信息302，，量化方法指示信息303，带宽指示信息304，基向量指示信息305。应理解，图3中的301-305不必同时出现。当基站100为终端110配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系，或者预编码量化参数配置集索引和预编码量化参数配置集的对应关系是预设的，则终端通过预编码量化参数配置集索引可以获得预编码量化参数配置集，此时，预编码量化参数信息则包含预编码量化参数配置集索引，其他信息则不必包含在预编码量化参数信息中。如果按照预定义的带宽小于某个值时，比如20M，预编码将针对全带宽，则此时带宽指示信息也不是必须的。FIG. 3 is a schematic diagram of a coding format of a precoding quantization parameter configuration set according to an embodiment of the present disclosure. As described above, the precoding quantization parameter information includes at least one of the following information: quantization threshold information 301, quantization value bit number information 302, quantization method indication information 303, bandwidth indication information 304, base vector indication information 305. It should be understood that 301-305 in Figure 3 need not be present at the same time. When the base station 100 configures the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110, or the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, the terminal is preset. The precoding quantization parameter configuration set may be obtained by precoding the quantization parameter configuration set index. In this case, the precoding quantization parameter information includes a precoding quantization parameter configuration set index, and other information is not necessarily included in the precoding quantization parameter information. If the pre-defined bandwidth is less than a certain value, such as 20M, the precoding will be for the full bandwidth, then the bandwidth indication information is not necessary at this time.
应理解，在本发明实施例中，由于预编码量化参数信息的各参数在不同的场景下有不同的配置，因此，预编码量化参数信息的编码格式在不同配置下也是不同的。为了能识别预编码量化参数信息中实际传输的参数，因此，每个参数会包括一个参数类型指示信息，比如可以用3个比特，不同的值代表不同的参数。It should be understood that, in the embodiment of the present invention, since the parameters of the precoding quantization parameter information have different configurations in different scenarios, the encoding format of the precoding quantization parameter information is different in different configurations. In order to identify the parameters actually transmitted in the precoding quantization parameter information, each parameter may include a parameter type indication information, for example, 3 bits may be used, and different values represent different parameters.
本发明实施例提供了一种灵活的预编码量化参数信息的编码格式，能适应不同场景下对预编码量化参数信息的配置。The embodiment of the present invention provides a flexible encoding format of precoding quantization parameter information, which can be adapted to the configuration of precoding quantization parameter information in different scenarios.
在一种可选的方案中，预编码量化参数信息300包含量化方法指示信息，所述量化方法可以包含上述非均匀量化，比特映射量化，或者其他量化方法。当预编码量化参数信息300包含量化方法指示信息时，可以至少有两种方法表示：一是每个预编码量化参数配置集索引关联一个量化方法指示信息，二是一个量化方法指示信息关联一组预编码量化参数配置集索引。下面表1示出了每个预编码量化参数配置集索引关联一个量化方法指示信息的示例。In an alternative, the precoding quantization parameter information 300 includes quantization method indication information, and the quantization method may include the above non-uniform quantization, bit map quantization, or other quantization methods. When the precoding quantization parameter information 300 includes the quantization method indication information, there may be at least two methods: one is that each precoding quantization parameter configuration set index is associated with one quantization method indication information, and the other is that a quantization method indicates that the information is associated with a group. Precoded quantization parameter configuration set index. Table 1 below shows an example in which each precoding quantization parameter configuration set index is associated with one quantization method indication information.
表1量化参数配置集示例一Table 1 Quantization parameter configuration set example one
Figure PCTCN2018120261-appb-000001
Figure PCTCN2018120261-appb-000001
Figure PCTCN2018120261-appb-000002
Figure PCTCN2018120261-appb-000002
在表1中，预编码量化参数配置集索引是顺序编号的，每个预编码量化参数配置集索引关联一组量化门限的信息、量化值的比特位数信息，以及一个量化方法。In Table 1, the precoding quantization parameter configuration set index is sequentially numbered, and each precoding quantization parameter configuration set index associates information of a set of quantization thresholds, bit number information of quantized values, and a quantization method.
应理解，上述表1仅是一个示例，并不代表一个实际的配置表，或者配置表中每项参数的数值是固定的。相反，表中每项预编码量化参数配置集索引对应的预编码量化参数配置集的值可以任意配置，也可以是通过标准定义的。表中给出了一个量化门限的例子，根据前述量化方法，可以有多个预编码量化门限的信息及多个量化值的比特位数信息。本领域普通技术人员容易想到的表中数值的改变或替换，以及任何增加或减少，都应属于在本实施例揭露的技术范围。It should be understood that the above Table 1 is only an example, does not represent an actual configuration table, or the value of each parameter in the configuration table is fixed. In contrast, the value of the precoding quantization parameter configuration set corresponding to each precoding quantization parameter configuration set index in the table may be arbitrarily configured, or may be defined by a standard. An example of a quantization threshold is given in the table. According to the foregoing quantization method, there may be a plurality of precoding quantization threshold information and a plurality of quantization value bit number information. Variations or substitutions of values in the tables that are readily apparent to those of ordinary skill in the art, as well as any increase or decrease, are within the skill of the present disclosure.
通过本发明实施例，可以为用户提供的预编码量化参数配置集索引，量化方法指示信息通过预编码量化参数配置集索引可以获得，方法简单。According to the embodiment of the present invention, the precoding quantization parameter configuration set index provided by the user may be obtained, and the quantization method indication information may be obtained by using the precoding quantization parameter configuration set index, and the method is simple.
在另一种可选的方案中，可以通过量化方法指示信息独立确定其对应的预编码量化参数配置集，如表2和3所示。In another alternative, the corresponding precoding quantization parameter configuration set may be independently determined by the quantization method indication information, as shown in Tables 2 and 3.
表2非均匀量化预编码量化参数配置集示例Table 2 Example of Non-uniform Quantization Precoding Quantization Parameter Configuration Set
Figure PCTCN2018120261-appb-000003
Figure PCTCN2018120261-appb-000003
表3比特映射量化预编码量化参数配置集示例Table 3 Bitmap Quantization Precoding Quantization Parameter Configuration Set Example
Figure PCTCN2018120261-appb-000004
Figure PCTCN2018120261-appb-000004
Figure PCTCN2018120261-appb-000005
Figure PCTCN2018120261-appb-000005
在表2和表3中，不同的量化方法分别对应一张预编码量化参数信息表，当基站100为UE110-130配置预编码量化参数信息时，通过预编码量化参数配置集索引来进行量化参数的配置。表2和表3中的预编码量化参数配置集索引的编号可以重复，也可以不重复，当不重复时，和表1没有本质上的不同，通过预编码量化参数配置集索引即可唯一对应一个预编码量化参数配置集。但是当预编码量化参数配置集比较多的时候，用于预编码量化参数配置集索引的比特数会比较多，因此开销会比较大。当表2和表3的预编码量化参数配置集索引都从，比如0，开始编号时，则需要量化方法指示信息和预编码量化参数配置集索引共同指定一组预编码量化参数配置集。在实际实现中，当仅支持一种量化方法，比如，非均匀量化时，就只有一个预编码量化参数配置表，不需要量化方法指示信息。因此，量化方法指示信息不是必须的，依赖于具体的实现方法或者约定。In Table 2 and Table 3, different quantization methods respectively correspond to a precoding quantization parameter information table. When the base station 100 configures precoding quantization parameter information for the UE 110-130, the quantization parameter is performed by precoding the quantization parameter configuration set index. Configuration. The numbers of the precoding quantization parameter configuration set indexes in Table 2 and Table 3 may or may not be repeated. When not repeated, there is no essential difference from Table 1, and the index can be uniquely configured by precoding the quantization parameter configuration set index. A precoding quantization parameter configuration set. However, when the precoding quantization parameter configuration set is relatively large, the number of bits used for precoding the quantization parameter configuration set index is relatively large, so the overhead is relatively large. When the precoding quantization parameter configuration set indexes of Table 2 and Table 3 are all numbered from, for example, 0, the quantization method indication information and the precoding quantization parameter configuration set index are required to jointly design a set of precoding quantization parameter configuration sets. In an actual implementation, when only one quantization method is supported, for example, non-uniform quantization, there is only one precoding quantization parameter configuration table, and no quantization method indication information is needed. Therefore, the quantization method indicates that the information is not necessary and depends on the specific implementation method or convention.
采用本实施例的方法，可以减小预编码量化参数配置集索引的长度，降低开销，尤其是当预编码量化参数配置集索引比较多的时候。With the method of this embodiment, the length of the precoding quantization parameter configuration set index can be reduced, and the overhead is reduced, especially when the precoding quantization parameter configuration set index is relatively large.
当采用基于比特映射的量化方法时，如前所述，预编码量化参数信息需要包含基向量指示信息，即选定的基向量的比特映射bitmap和/或基向量长度指示。When a bit map based quantization method is employed, as previously described, the precoded quantization parameter information needs to include base vector indication information, ie, a bit map bitmap and/or a base vector length indication of the selected base vector.
如前所述，预编码量化参数信息可以承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。如果预编码系统支持基站100为终端110配置了预编码量化参数配置集索引和预编码量化参数配置集的对应关系，基站100通过物理下行链路控制信道(PDCCH)或者MAC层控制信令(MAC CE)来配置预编码量化参数配置集索引能够实现快速的预编码量化参数配置集的重配。而预编码量化参数配置集索引和预编码量化参数配置集之间的对应关系则是承载在无线资源控制(RRC)信令或者MAC层控制信令(MAC CE)中的。如前所述，如果不同量化方法指示信息独立确定其对应的预编码量化参数配置集，在使用预编码量化参数配置集索引对预编码量化参数信息进行重配时，需要同时指配量化方法指示信息以和预编码量化参数配置集索引共同确定预编码量化参数配置集。As previously mentioned, the precoding quantization parameter information may be carried in a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio Resource Control (RRC) signaling. If the precoding system supports the base station 100 to configure the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110, the base station 100 passes the physical downlink control channel (PDCCH) or the MAC layer control signaling (MAC). CE) to configure the precoding quantization parameter configuration set index enables fast reconfiguration of the precoding quantization parameter configuration set. The correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is carried in Radio Resource Control (RRC) signaling or MAC layer control signaling (MAC CE). As described above, if different quantization method indication information independently determines its corresponding precoding quantization parameter configuration set, when recoding the precoding quantization parameter information using the precoding quantization parameter configuration set index, it is necessary to simultaneously assign the quantization method indication. The information is combined with the precoded quantization parameter configuration set index to determine a precoding quantization parameter configuration set.
在一种可选的方案中，通过无线资源控制(RRC)信令或者MAC层控制信令(MAC CE)配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系时，也可以直接激活一个预编码量化参数配置集，物理下行链路控制信道(PDCCH)或者MAC层控制信令(MAC CE)则用来对预编码量化参数配置集进行重配。通过直接的预编码量化参数信息的配置，由于无需预先配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系，可以减少空口信令。In an optional solution, when the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is configured by radio resource control (RRC) signaling or MAC layer control signaling (MAC CE), A precoding quantization parameter configuration set is directly activated, and a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE) is used to reconfigure the precoding quantization parameter configuration set. By configuring the direct precoding quantization parameter information, since the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is not required to be configured in advance, air interface signaling can be reduced.
在一种可选的方案中，预编码量化参数配置集索引和预编码量化参数配置集的对应关系是预设的，即通过协议定义的方式固定配置的。这样基站100和终端110都根据预设的对应关系，可以通过预编码量化参数配置集索引获取预编码量化参数配置集的信息。此时，只需要通过物理下行链路控制信道(PDCCH)或者MAC层控制信令(MAC CE)配置一个预编码量化参数配置集索引来指配一个预编码量化参数配置集。这一方法由于配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系是预定义的，基站100无需为终端110配置预编码量化参数配置集索引和预编码量化参数配置集的对应关系，空口信令开销可以进一步降低。In an optional solution, the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is preset, that is, fixedly configured by a protocol definition manner. In this way, the base station 100 and the terminal 110 can obtain the information of the precoding quantization parameter configuration set through the precoding quantization parameter configuration set index according to the preset correspondence. At this time, only one precoding quantization parameter configuration set index needs to be configured through a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE) to assign a precoding quantization parameter configuration set. In this method, since the correspondence between the configuration precoding quantization parameter configuration set index and the precoding quantization parameter configuration set is predefined, the base station 100 does not need to configure the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set for the terminal 110. Relationship, air interface signaling overhead can be further reduced.
在基站100获得预编码矩阵并对矩阵的每个向量的每个元素进行量化后，得到的预编码量化值需要在空口传输，但是空口传输的预编码量化结果信息是具有一定格式的，对不同的量化方法和预编码量化参数配置集索引，由于不同的量化值的比特位数信息可能相同，也可能不同，以及不同的量化方法传输的内容也有差异，为进行有效的信息传输及降低开销，需要定义高效的预编码量化结果信息格式。以下说明预编码量化结果信息的空口传输格式。After the base station 100 obtains the precoding matrix and quantizes each element of each vector of the matrix, the obtained precoded quantized value needs to be transmitted in the air interface, but the precoding quantization result information of the air interface transmission has a certain format, and is different. The quantization method and the precoding quantization parameter configuration set index, since the bit number information of different quantization values may be the same, may be different, and the content of different quantization methods is also different, for effective information transmission and reducing overhead, It is necessary to define an efficient precoding quantization result information format. The air interface transmission format of the precoding quantization result information will be described below.
图4为本申请实施例提供的非均匀量化值信息格式示意图。在前述图2步骤202中，为进行预编码量化结果信息的传输，需要将预编码矩阵的每个向量的每个元素的实部和虚部的量化值形成一定的信息格式并传输。以非均匀量化为例。图4中以表1或表2的预编码量化参数配置集索引为0-4，两个流为例，即预编码矩阵有两个向量，UE，如UE110，支持的发射天线端口数m＝8。预编码量化结果信息400主要包括两部分：一是信息长度410，另一部分是非均匀量化值420。其中，信息长度410包含预编码矩阵向量个数411，向量长度指示412用于指示预编码矩阵的每个向量包含的元素个数，即为本实施例中的m＝8。非均匀量化值420包含预编码矩阵的每个向量的每个元素的实部和虚部的量化值，本实施例假定具有两个向量。每个预编码矩阵向量的各元素的实部和虚部的量化值都包含一个最大索引值4211,4221，以及除最大索引值对应的元素外的每个元素的实部和虚部的量化值，例如，预编码矩阵第一个向量的第一元素量化值4212进一步包含实部I的量化值和虚部Q的量化值。由于表1或2的量化模式0-4中，实部和虚部的量化长度相同，因此，量化值的比特位数是固定的，无需在预编码量化结果信息编码中给定，通过预编码量化参数配置集索引或者预编码量化参数配置集的信息即可知道量化值的比特位数信息。FIG. 4 is a schematic diagram of a non-uniform quantized value information format according to an embodiment of the present application. In the foregoing step 202 of FIG. 2, in order to perform precoding quantization result information transmission, it is necessary to form a certain information format and transmit the quantized value of the real part and the imaginary part of each element of each vector of the precoding matrix. Take non-uniform quantization as an example. In FIG. 4, the precoding quantization parameter configuration set index of Table 1 or Table 2 is 0-4, and two streams are taken as an example, that is, the precoding matrix has two vectors, and the UE, such as UE 110, supports the number of transmitting antenna ports m= 8. The precoding quantized result information 400 mainly includes two parts: one is the information length 410, and the other is the non-uniform quantized value 420. The information length 410 includes a precoding matrix vector number 411, and the vector length indication 412 is used to indicate the number of elements included in each vector of the precoding matrix, that is, m=8 in this embodiment. The non-uniform quantized value 420 contains quantized values of the real and imaginary parts of each element of each vector of the precoding matrix, and this embodiment assumes that there are two vectors. The quantized values of the real and imaginary parts of each element of each precoding matrix vector contain a maximum index value 4211, 4221, and quantized values of the real and imaginary parts of each element except the element corresponding to the largest index value. For example, the first element quantized value 4212 of the first vector of the precoding matrix further includes the quantized value of the real part I and the quantized value of the imaginary part Q. Since the quantization lengths of the real part and the imaginary part are the same in the quantization mode 0-4 of Table 1 or 2, the bit number of the quantized value is fixed, and it is not required to be given in the encoding of the precoding quantization result information, and the precoding is performed. The bit number information of the quantized value can be known by the information of the quantization parameter configuration set index or the precoding quantization parameter configuration set.
图5为本申请实施例提供的另一种非均匀量化值信息格式示意图。图5是图4中非均匀量化值420的另一种不同的编码格式，为方便起见，省略了信息长度410。应理解，信息长度410仍然是图5的一部分，这里仅出于描述的需要，仅给出了非均匀量化值420的不同的信息格式。FIG. 5 is a schematic diagram of another non-uniform quantized value information format according to an embodiment of the present disclosure. 5 is another different encoding format for the non-uniform quantized value 420 of FIG. 4, with the information length 410 omitted for convenience. It should be understood that the information length 410 is still part of FIG. 5, and only the different information formats of the non-uniform quantized values 420 are given herein for the purposes of the description only.
与图4中非均匀量化值的表示方法不同的是，每个预编码矩阵某个向量的元素的实部514，518,524,528和虚部515，519,525,529量化值的比特位数信息不同，每个元素的实部I和虚部Q经过量化后得到的值的二进制值的长度可能不同。因此，需要实部I的实部长度指示512,516,522,526以及虚部Q的虚部长度指示513,517,523,527，以便于UE110-130根据实部长度指示和虚部长度指示可以获得对应的量化值的比特位数信息，从而可以根据每个元素的实部和虚部的量化值和预编码量化参数信息恢复出量化前的每个元素的实部I的值和虚部Q的值。图5中将同一元素的实部长度指示和虚部长度指示的量化值的比特位数信息集中放置， 也可以分开放置，即一个实部长度指示或虚部长度指示的后面跟一个量化值。还可以是将向量的所有除最大值索引对应的元素外的所有元素的实部长度指示和虚部长度指示集中放置。其中每个元素的实部长度指示和虚部长度指示，对仅有一个量化门限的场景，可以用一个比特表示，例如，0表示小于量化门限，1表示大于等于量化门限，通过实部长度指示和虚部长度指示就可以获得量化值的比特位数信息。Different from the representation method of the non-uniform quantization value in FIG. 4, the real part 514, 518, 524, 528 of the element of each vector of each precoding matrix and the imaginary part 515, 519, 525, 529 have different bit number information of the quantized value, and each element has The length of the binary value of the value obtained by the real part I and the imaginary part Q may be different. Therefore, the real part length indications 512, 516, 522, 526 of the real part I and the imaginary part length indications 513, 517, 523, 527 of the imaginary part Q are required, so that the UE 110-130 can obtain the bit number information of the corresponding quantized value according to the real part length indication and the imaginary part length indication, Thereby, the value of the real part I and the value of the imaginary part Q of each element before quantization can be recovered from the quantized value of the real part and the imaginary part of each element and the precoding quantization parameter information. In FIG. 5, the real bit length indication of the same element and the bit number information of the quantized value indicated by the imaginary part length are collectively placed, or may be separately placed, that is, a real length indication or an imaginary length indication is followed by a quantized value. It is also possible to focus the real part length indication and the imaginary part length indication of all the elements except the elements corresponding to the maximum value index of the vector. The real part length indication and the imaginary part length indication of each element may be represented by one bit for a scene having only one quantization threshold, for example, 0 means less than the quantization threshold, 1 means greater than or equal to the quantization threshold, and is indicated by the real part length. The bit number information of the quantized value can be obtained by the imaginary part length indication.
应理解，图4和图5仅是一个预编码量化结果信息编码格式表示的一种可能，这些参数也可以有其他的编码格式来进行表示。本技术领域的普通技术人员容易想到各种等效的修改或替换，都应属于在本实施例揭露的技术范围。It should be understood that Figures 4 and 5 are only one possibility of representing a precoding quantization result information encoding format, and these parameters may also be represented by other encoding formats. Those skilled in the art will readily appreciate that various equivalent modifications or substitutions are intended to fall within the scope of the present disclosure.
通过将非均匀量化值形成预编码量化结果信息格式，便于基站100和UE110-130能统一预编码量化结果信息的格式，UE110-130可以正确解析预编码量化结果信息，同时有效的编码格式，实现对信息传输的压缩，降低空口信令开销。By forming the pre-quantized quantization result information format into the non-uniform quantized value, the base station 100 and the UE 110-130 can easily unify the format of the pre-encoded quantized result information, and the UE 110-130 can correctly parse the pre-encoded quantized result information and simultaneously implement an effective encoding format. Compression of information transmission reduces air interface signaling overhead.
图6为本申请实施例提供的比特映射量化值的信息格式示意图。图6是针对表1中的量化模式11-15和表2中的量化模式0-3，每个基向量的系数的实部I和虚部Q的量化值的比特位数信息相同的场景。基于比特映射量化的预编码量化结果信息600包括两部分：信息长度610和比特映射量化值620。其中，信息长度610在比特映射量化的预编码量化结果信息编码中不同于前述非均匀量化中的的信息长度410的编码方式。在本实施例方案中，信息长度610主要用来指示比特映射量化中预编码量化结果信息的编码长度信息，以字节表示。由于在基于比特映射的量化方法中，预编码量化参数信息中会给出基向量指示信息，因此，通过基向量指示信息可以获得基向量个数和每个基向量元素个数的信息，因此，在一种优选方案中，基于比特映射量化的预编码量化结果信息600中的信息长度610可以省略。由于通过预编码量化参数配置集索引就可以知道其量化值的比特位数信息，因此，在比特映射量化值602部分不需要包含实部长度指示和虚部长度指示，所有系数的实部和虚部的量化结果的比特位数长度一致。FIG. 6 is a schematic diagram of an information format of a bit map quantization value according to an embodiment of the present disclosure. 6 is a scenario in which the bit number information of the quantized value of the real part I and the imaginary part Q of the coefficient of each base vector is the same for the quantization mode 11-15 in Table 1 and the quantization mode 0-3 in Table 2. The precoding quantization result information 600 based on the bit map quantization includes two parts: an information length 610 and a bit map quantization value 620. The information length 610 is different from the encoding mode of the information length 410 in the non-uniform quantization described above in the bit map quantized precoding quantization result information encoding. In the solution of this embodiment, the information length 610 is mainly used to indicate the encoding length information of the precoding quantization result information in the bit mapping quantization, which is represented by bytes. Since the base vector indication information is given in the precoding quantization parameter information in the bit map-based quantization method, information of the number of base vectors and the number of elements of each base vector can be obtained by the base vector indication information, and therefore, In a preferred arrangement, the information length 610 in the pre-coded quantized result information 600 based on the bit map quantization may be omitted. Since the bit number information of the quantized value can be known by the precoding quantization parameter configuration set index, the bit map quantized value 602 part does not need to include the real part length indication and the imaginary part length indication, and the real part and the virtual part of all the coefficients The quantized result of the part has the same bit length.
图7为本申请实施例提供的另一种比特映射量化值的信息格式示意图。图7是图6中比特映射量化值620的一种不同的编码格式，为方便起见，省略了信息长度610。应理解，信息长度610如前所述，不再赘述。FIG. 7 is a schematic diagram of an information format of another bit map quantization value according to an embodiment of the present disclosure. 7 is a different encoding format of the bit map quantized value 620 of FIG. 6, with the information length 610 omitted for convenience. It should be understood that the information length 610 is as described above and will not be described again.
图7中比特映射量化值700和图6的比特映射量化值620的不同之处在于多个量化值的比特位数信息是不同的。与图6中比特映射量化值的表示方法不同的是，由于每个系数的实部713,723和虚部714,724由于其值的不同，每个元素的实部713,723和虚部714,724经过量化后得到的值的二进制值的长度可能不同，因此，需要实部I的实部长度指示711,721以及虚部Q的虚部长度指示712,722，以便于UE110-130根据实部长度指示和虚部长度指示可以获得对应的量化值的比特位数信息，从而可以根据每个系数的实部和虚部的量化值和预编码量化参数信息恢复出量化前的每个系数的实部I的值和虚部Q的值。图7中将同一系数的实部I和虚部Q的量化值的实部长度指示和虚部长度指示集中放置，也可以分开放置，即一个实部长度指示或虚部长度指示后跟一个量化值。还可以是将所有基向量的系数的所有实部长度指示和虚部长度指示集中放置。其中实部I或虚部Q的实部长度指示和虚部长度指示，对仅有一个量化门限的场景，可以用一个比特表示，例如，0表示小于量化门限，1表示大于等于量化门限，而量化值的比特位数信息则可以通过实部长度指示和虚部长度指示以及预编码量化参数信息而获得。The bit map quantized value 700 in FIG. 7 is different from the bit map quantized value 620 of FIG. 6 in that the bit bit information of the plurality of quantized values is different. Different from the representation method of the bit map quantized value in FIG. 6, since the real part 713, 723 and the imaginary part 714, 724 of each coefficient are quantized, the real part 713, 723 and the imaginary part 714, 724 of each element are quantized. The length of the binary value may be different. Therefore, the real part length indication 711, 721 of the real part I and the imaginary part length indication 712, 722 of the imaginary part Q are required, so that the UE 110-130 can obtain the corresponding according to the real part length indication and the imaginary part length indication. The bit number information of the quantized value is such that the value of the real part I and the value of the imaginary part Q of each coefficient before quantization can be recovered from the quantized value of the real part and the imaginary part of each coefficient and the precoded quantization parameter information. In FIG. 7, the real part length indication and the imaginary part length indication of the quantized value of the real part I and the imaginary part Q of the same coefficient are collectively placed, and may also be placed separately, that is, a real part length indication or an imaginary part length indication followed by a quantized value . It is also possible to centrally place all real length indications and imaginary length indications of the coefficients of all base vectors. The real part length indication and the imaginary part length indication of the real part I or the imaginary part Q may be represented by one bit for a scene having only one quantization threshold, for example, 0 means less than the quantization threshold, and 1 means greater than or equal to the quantization threshold, and The bit number information of the quantized value can then be obtained by the real part length indication and the imaginary part length indication and the precoding quantization parameter information.
通过将比特映射串(bitmap)量化值形成预编码量化结果信息格式，便于基站100和 UE110-130能统一预编码量化结果信息的格式，UE110-130可以正确解析预编码量化结果信息，同时有效的编码格式，实现对信息传输的压缩，降低空口信令开销。By forming the pre-coded quantization result information format by using the bitmap-mapped quantized value, the base station 100 and the UE 110-130 can easily unify the format of the pre-encoded quantized result information, and the UE 110-130 can correctly parse the pre-encoded quantized result information, and is effective at the same time. The encoding format implements compression of information transmission and reduces air interface signaling overhead.
在完成上述预编码量化参数信息和预编码量化结果信息的编码后，基站100在空口就可以进行预编码量化参数信息和预编码量化结果信息。在空口可以传输预编码量化参数信息和预编码量化结果信息的消息如前所述，不再赘述。应理解，前述信令RRC,MAC CE,PDCCH,PDSCH的信令名称只是说明传输不同消息的方法，在不同的技术或不同的标准规范中可能采用不同的消息名称，本技术领域的普通技术人员容易想到的任何其它信令的名称或变种，都应属于在本发明实施例揭露的技术范围。After completing the encoding of the precoding quantization parameter information and the precoding quantization result information, the base station 100 can perform precoding quantization parameter information and precoding quantization result information on the air interface. The message that the precoding quantization parameter information and the precoding quantization result information can be transmitted in the air interface is as described above, and will not be described again. It should be understood that the signaling names of the foregoing signaling RRC, MAC CE, PDCCH, PDSCH are only methods for transmitting different messages, and different message names may be adopted in different technologies or different standard specifications, and those skilled in the art may be used. Any other name or variant of the signaling that is conceivable should fall within the technical scope disclosed in the embodiments of the present invention.
UE110-130通过空口接收预编码量化参数信息和预编码量化结果信息，并对接收到的预编码量化结果信息进行解量化，从而获得预编码矩阵。UE110-130接收消息的过程及处理如图1和图2所示。应理解，UE110-130并不需要同时接收预编码量化参数信息和预编码量化结果信息，同时接收的意思是指每次接收预编码量化结果信息都会伴随有预编码量化参数信息的传输，预编码量化参数信息的传输在预编码量化结果信息之前，或者在同一消息接收到。如前所述，预编码量化参数信息和预编码量化结果信息的接收可以相互独立。The UE 110-130 receives the precoding quantization parameter information and the precoding quantization result information through the air interface, and dequantizes the received precoding quantization result information, thereby obtaining a precoding matrix. The process and processing of receiving messages by UEs 110-130 are as shown in FIGS. 1 and 2. It should be understood that the UE 110-130 does not need to receive the precoding quantization parameter information and the precoding quantization result information at the same time, and the received meaning means that each time the precoding quantization result information is received, the transmission of the precoding quantization parameter information is accompanied by precoding. The transmission of the quantization parameter information is preceded by precoding the quantized result information or received in the same message. As described above, the reception of the precoding quantization parameter information and the precoding quantization result information may be independent of each other.
以下具体说明图2中预编码量化结果信息的生成过程。The generation process of the precoding quantization result information in Fig. 2 will be specifically described below.
基站100对UE，比如UE101，发送的SRS进行测量得到信道估计矩阵H。基站100通过对得到的信道估计矩阵H进行分解，获得一个预编码矩阵。预编码矩阵包含一个或多个向量，每个向量包含若干元素，每个元素是一个包含实部I和虚部Q的复数。对构成预编码矩阵的每个向量的各元素进行量化获得一组量化值。量化方法为非均匀量化。应理解，这里非均匀量化只是一个示例，其目的在于获得量化结果，任何本领域的谱图技术人员容易想到的其他量化方法或替换，都应属于在本发明实施例揭露的技术范围。The base station 100 measures the SRS transmitted by the UE, such as the UE 101, to obtain a channel estimation matrix H. The base station 100 obtains a precoding matrix by decomposing the obtained channel estimation matrix H. The precoding matrix contains one or more vectors, each vector containing several elements, each element being a complex number containing the real part I and the imaginary part Q. Each element constituting each vector of the precoding matrix is quantized to obtain a set of quantized values. The quantization method is non-uniform quantization. It should be understood that the non-uniform quantization here is only an example, and the purpose thereof is to obtain the quantified result, and any other quantization method or replacement that is easily conceived by the spectrum technicians in the art should belong to the technical scope disclosed in the embodiments of the present invention.
通过对SRS测量而获得的信道估计矩阵H进行奇异分解，可以获得一个酉矩阵，通过选取酉矩阵的N列具有最大特征值的右奇异向量，就获得一个预编码矩阵。对信道估计矩阵H进行奇异分解已为大家所熟知，因此这里不再进行详细阐述。By performing singular decomposition on the channel estimation matrix H obtained by SRS measurement, a unitary matrix can be obtained, and a precoding matrix is obtained by selecting the right singular vector having the largest eigenvalue in the N columns of the unitary matrix. The singular decomposition of the channel estimation matrix H is well known and will not be elaborated here.
以基站100接收天线端口数为64为例，假定UE，如UE110发射天线端口数为8，那么在基站100对信道进行测量后会得到一个信道估计矩阵H，是一个64×8的矩阵，通过对H进行奇异分解，得到一个8×8的酉矩阵。天线端口数通常又称为通道，例如，具有64天线端口数又被称为64通道。在本申请中，天线端口数和通道会不加区分地使用，不再说明。为了获得发送端的预编码矩阵，从8×8的酉矩阵中选择N列具有最大特征值的右奇异向量，即构成8×N rank的矩阵，其中N rank表示发送的流数，发送的流数也称为层数(在本申请中，流数和层数在很多情况下会不加区分地使用，不再说明)得到的8×N rank的矩阵即为确定的预编码矩阵，记为W。 Taking the number of receiving antenna ports of the base station 100 as 64 as an example, assuming that the number of transmitting antenna ports of the UE, such as the UE 110, is 8, then after the base station 100 measures the channel, a channel estimation matrix H is obtained, which is a 64×8 matrix. Singularly decomposed H to obtain an 8 × 8 酉 matrix. The number of antenna ports is also commonly referred to as a channel, for example, having a 64-antenna port number is also referred to as 64 channels. In this application, the number of antenna ports and channels will be used indiscriminately and will not be described. In order to obtain the precoding matrix of the transmitting end, the right singular vector having the largest eigenvalue of N columns is selected from the 8×8 酉 matrix, that is, the matrix constituting 8×N rank , where N rank represents the number of streams sent, and the number of streams sent Also known as the number of layers (in the present application, the number of streams and the number of layers will be used indiscriminately in many cases, no longer explained), the resulting matrix of 8 × N rank is the determined precoding matrix, denoted W .
以下是量化的具体实现过程的说明。The following is a description of the specific implementation process for quantification.
这里以20M带宽为例，基站100具有64通道，UE，如UE110，具有8通道，UE110支持2个数据流传输。应理解，这里只是以基站100接收64通道，UE110发送8通道，每个UE支持两个数据流传输为例，本发明实施例的保护范围并不局限于此，任何具有其他数量的接收通道、发送通道和流数都在本申请的保护范围内。本发明实施例以非均匀量化作为例子，但本技术领域的普通技术人员容易想到的任何其他量化方法的修改或替换，都应属于在本发明实施例揭露的技术范围。Here, taking the 20M bandwidth as an example, the base station 100 has 64 channels, and the UE, such as the UE 110, has 8 channels, and the UE 110 supports 2 data streams. It should be understood that the base station 100 only receives 64 channels, the UE 110 transmits 8 channels, and each UE supports two data stream transmissions as an example. The protection scope of the embodiment of the present invention is not limited thereto, and any other number of receiving channels, Both the transmission channel and the number of streams are within the scope of this application. The embodiment of the present invention takes non-uniform quantization as an example, but any modification or replacement of any other quantization method that is easily conceived by those skilled in the art should fall within the technical scope disclosed in the embodiments of the present invention.
假设某个UE某个维度(子带或宽带)的预编码矩阵为W(m*r)＝[w 1,w 2,...w r]，其中，每个w i(i＝1...r)是包含m个元素的向量,每个向量的每个元素是一个复数，即包含实部(I)和虚部(Q)。由于UE，如UE110，的发射天线端口数为m＝8，在上行方向上发送的流数为(或称为层数)，r＝2，所以 Suppose that the precoding matrix of a certain dimension (subband or wideband) of a certain UE is W(m*r)=[w 1 , w 2 ,...w r ], where each w i (i=1. ..r) is a vector containing m elements, each element of each vector is a complex number, ie containing the real part (I) and the imaginary part (Q). Since the number of transmit antenna ports of the UE, such as the UE 110, is m=8, the number of streams sent in the uplink direction is (or called the number of layers), r=2, so
W＝[w 1,w 2]其中，W中的某个向量可以表示为w ir＝[x 1,x 2,...,x 8] T,ir＝1...r，x i(i＝1...8)称为向量w ir的元素，每个元素是一个复数，包括实部(I)和虚部(Q)。 W=[w 1 ,w 2 ] where a vector in W can be expressed as w ir =[x 1 ,x 2 ,...,x 8 ] T , ir=1...r, x i ( i=1...8) An element called a vector w ir , each element being a complex number including the real part (I) and the imaginary part (Q).
首先找到向量w ir中8个元素中范数最大的元素x max及最大值对应的位置im，im的二进制数用Y比特来表示，即向量w ir中元素范数最大的元素对应的位置索引， First find the element with the largest norm x max and the maximum value of the eight elements in the vector w ir . The binary number of the im is represented by the Y bit, that is, the position index corresponding to the element with the largest element norm in the vector w ir ,
[x max,im]＝max(||x i||),其中||x i||表示元素x i的范数 [x max ,im]=max(||x i ||), where ||x i || represents the norm of the element x i
利用范数最大值对向量w ir中所有元素进行归一化，得到w ir',归一化方法如下： Normalize all elements in the vector w ir using the norm max to get w ir '. The normalization method is as follows:
w ir'＝[x 1',x 2',...,x im-1',x im',1,x im+1',....x m'] T,x i'＝x i/x max w ir '=[x 1 ',x 2 ',...,x im-1 ',x im ',1,x im+1 ',....x m '] T ,x i '=x i /x max
上式中，m＝8。In the above formula, m=8.
上述变换是使得范数最大值那个元素变换成1,从而不用传输，只传输其它元素，而向量w ir通过上述归一化后的功率大于1。 The above transformation is such that the element of the maximum of the norm is transformed into 1, so that only the other elements are transmitted without transmission, and the normalized power of the vector w ir is greater than one by the above.
对归一化后的w ir'中除第im个元素外的m-1个元素进行变换，使得各个元素的实部I和虚部Q的数据变换后的范围在[0,1]，[]是一般的数学区间表示方法，表示大于等于0，小于等于1，不再赘述。具体变换方式是：对每个元素的实部I和虚部Q的数据分别进行变换；也可以是其他变换方式，只要将数据变换到范围[0,1]即可 The m-1 elements other than the i-th element in the normalized w ir ' are transformed such that the data of the real part I and the imaginary part Q of each element is transformed in [0, 1], [ ] is a general mathematical interval representation method, which means that it is greater than or equal to 0, less than or equal to 1, and will not be described again. The specific transformation method is: transforming the data of the real part I and the imaginary part Q of each element separately; or other transformation methods, as long as the data is transformed into the range [0, 1]
I i＝1/pi*arccos(real(x ir')) I i =1/pi*arccos(real(x ir '))
Q i＝1/pi*arccos(image(x ir')) Q i =1/pi*arccos(image(x ir '))
i＝1,2,...im-1,im+1,...,8i=1,2,...im-1,im+1,...,8
其中，pi表示圆周率常量，函数arccos()表示反余弦函数，函数real()表示取实部，函数image()表示取虚部。以下不再赘述。Where pi represents the pi constant, the function arccos() represents the inverse cosine function, the function real() represents the real part, and the function image() represents the imaginary part. The details are not described below.
对除第im个元素外的m-1个元素的2·(m-1)(实部和虚部)个数变换后的[0,1]的数据进行非均匀量化，其量化过程是：Non-uniform quantization is performed on the data of [0, 1] after the number of 2·(m-1) (real part and imaginary part) of the m-1 elements except the first element, and the quantization process is:
设置量化门限T(0<＝T<＝1)，依次将m-1个元素的实部和虚部一共2·(m-1)个经上述变换得到的数分别与T进行比较，大于等于T的数的量化值用Y1比特表示，小于T的数的量化值用Y2比特表示。这里只是一个示例，并不限定比较的值的范围，也可以是对大于T的数的量化值用Y1比特表示，小于等于T的数的量化值用Y2比特表示。例如，取T＝0.5，Y1>＝Y2,Y1＝8,Y2＝4，也可以是其他配置，这里只是一个示例。上述2·(m-1)个变换后的数据，即I i和Q i，是在[0,1]之间的数，为便于用二进制进行表达量化参数，通过以下函数获得量化值： Set the quantization threshold T (0<=T<=1), and sequentially compare the real and imaginary parts of the m-1 elements by 2·(m-1) the numbers obtained by the above transformation, respectively, with T, greater than or equal to The quantized value of the number of T is represented by Y1 bit, and the quantized value of the number smaller than T is represented by Y2 bit. Here, it is only an example, and the range of values to be compared is not limited. Alternatively, the quantized value of the number larger than T may be represented by Y1 bit, and the quantized value of the number less than or equal to T may be represented by Y2 bit. For example, taking T=0.5, Y1>=Y2, Y1=8, Y2=4, can also be other configurations, here is just an example. Data 2 · (m-1) th conversion described above, i.e., I i and Q i, is a number between [0,1], for ease of expression binary quantization parameter, the quantization value is obtained by the following function:
I i'＝ceil(I i*power(2,Yn)),Yn＝Y1或Y2 I i '=ceil(I i *power(2,Yn)), Yn=Y1 or Y2
Q i'＝ceil(Q i*power(2,Ym)),Ym＝Y1或Y2 Q i '=ceil(Q i *power(2,Ym)), Ym=Y1 or Y2
i＝1,2,...im-1,im+1,...,8i=1,2,...im-1,im+1,...,8
其中，函数ceil()表示向上取整，power(2,Y)表示2的Y次幂。以下不再赘述。Among them, the function ceil () means round up, power (2, Y) represents 2 Y power. The details are not described below.
I i'和Q i'分别为预编码矩阵W的某个向量的第i个元素的实部和虚部的量化结果。I i'和Q i'的二进制数可以用Y1或Y2比特来表示，具体的比特数依赖于I i和Q i的值是大于等于T还是小于T。 I i 'and Q i ' are the quantized results of the real and imaginary parts of the i-th element of a vector of the precoding matrix W, respectively. The binary numbers of I i 'and Q i ' can be represented by Y1 or Y2 bits, and the specific number of bits depends on whether the values of I i and Q i are greater than or equal to T or less than T.
同样地，由于T是一个小于1的小数，为便于传输和编码，对T值的量化也可以采用上述方法，比如T'＝ceil(T*power(2,4))，还可以简单的将T比如乘以10，再把得到的结果用二进制表示即可。本实施例仅给出示例，并不规定T值量化的具体算法。但是T值的量化会采用预定的量化方法。Similarly, since T is a fraction less than 1, in order to facilitate transmission and encoding, the T method can also be used to quantify the T value, such as T'=ceil(T*power(2,4)), or simply For example, T is multiplied by 10, and the obtained result is expressed in binary. This embodiment only gives an example and does not specify a specific algorithm for T value quantization. However, the quantization of the T value will use a predetermined quantization method.
在另一种可选方案中，作为一般化，可设置多个门限，非均匀量化可支持2或多种以上的比特长度量化，以使得量化更加精确。例如，T1＝0.4，T2＝0.7，用X1比特对小于T1的量化值进行表示，用X2对[0.4,0.7]区间值进行表示，X3比特对大于T2的量化值进行表示等。应理解，这里的区间范围只是一个示例，并不限定其区间范围的取值，比如X2也可以是(0.4,0.7)，这里()表示大于0.4，小于0.7，X1比特用于对小于等于T1的量化值进行表示，X3比特对大于等于T2的量化值进行表示。In another alternative, as a generalization, multiple thresholds may be set, and non-uniform quantization may support 2 or more bit length quantizations to make quantization more accurate. For example, T1 = 0.4, T2 = 0.7, the quantized value smaller than T1 is represented by X1 bit, the [0.4, 0.7] interval value is represented by X2, and the quantized value larger than T2 is represented by X3 bit. It should be understood that the interval range here is only an example, and the value of the interval range is not limited. For example, X2 may also be (0.4, 0.7), where () indicates greater than 0.4, less than 0.7, and X1 bit is used for less than or equal to T1. The quantized value is represented, and the X3 bit is represented by a quantized value greater than or equal to T2.
在另一种可选方案中，在通过前述方法得到一个上行预编码矩阵后，即，通过对信道估计矩阵H进行奇异分解而得到，此处不再赘述，再将得到的预编码矩阵通过一组预定义的基向量进行组合，从而得到每个基向量的一个系数，通过对每个基向量的系数进行量化，从而得到一组量化结果，本申请发明实施例称这种量化方法为比特映射量化。例如，假设某个UE，如UE110，某个维度(子带或宽带)的预编码矩阵W(m*r)＝[w 1,w 2,...w r]，其中,w i(i＝1...r)是包含m个元素的向量，并且向量中的每个元素是一个复数，即每个元素包含实部(I)和虚部(Q)。在本实施例中，假定UE，如UE110，具有8个发射天线端口，即8个发射通道，m＝8，UE110在上行方向上调度的流数为2，也叫层数，即r＝2，所以预编码矩阵W为： In another alternative, after obtaining an uplink precoding matrix by the foregoing method, that is, by performing singular decomposition on the channel estimation matrix H, no further details are provided herein, and the obtained precoding matrix is passed through a A set of predefined base vectors are combined to obtain a coefficient of each base vector, and a set of quantized results are obtained by quantizing the coefficients of each base vector. This embodiment of the present invention refers to the quantization method as a bit map. Quantify. For example, suppose a certain UE, such as UE 110, a precoding matrix W(m*r)=[w 1 ,w 2 ,...w r ] of a certain dimension (subband or wideband), where w i (i =1...r) is a vector containing m elements, and each element in the vector is a complex number, that is, each element contains a real part (I) and an imaginary part (Q). In this embodiment, it is assumed that the UE, such as the UE 110, has eight transmit antenna ports, that is, eight transmit channels, and m=8, and the number of flows scheduled by the UE 110 in the uplink direction is 2, which is also called the number of layers, that is, r=2. , so the precoding matrix W is:
W＝[w 1,w 2] W=[w 1 ,w 2 ]
w ir＝[x 1,x 2,...,x 8] T,ir＝1～r表示矩阵W中第ir个流(层)对应的向量。 w ir =[x 1 ,x 2 ,...,x 8 ] T , ir=1 to r denote vectors corresponding to the irth stream (layer) in the matrix W.
对W中每个向量w ir用预定义的基向量进行组合而近似值得到，即： Approximate values are obtained by combining each vector w ir in W with a predefined base vector, namely:
w ir～＝a 1C 1+a 2C 2+...+a nC n(n＜＝m) w ir ～=a 1 C 1 +a 2 C 2 +...+a n C n (n<=m)
其中a i为系数，C i为预定义的基向量。 Where a i is a coefficient and C i is a predefined base vector.
例如下表给出了一组基向量的示例：For example, the following table gives an example of a set of base vectors:
表4基向量示例表Table 4 base vector example table
Figure PCTCN2018120261-appb-000006
Figure PCTCN2018120261-appb-000006
Figure PCTCN2018120261-appb-000007
Figure PCTCN2018120261-appb-000007
UE侧采用8天线端口发送，假设w 1: The UE side transmits using an 8-antenna port, assuming w 1 :
Figure PCTCN2018120261-appb-000008
Figure PCTCN2018120261-appb-000008
则选择基向量索引4、5、6、7、8、9、10、11,共8个基向量作为C 1,C 2,...C 8 Then select the base vector index 4, 5, 6, 7, 8, 9, 10, 11, a total of 8 base vectors as C 1 , C 2 , ... C 8
则then
a 1＝-0.2308+0.2308i, a 1 =-0.2308+0.2308i,
a 2＝0.1040+0.4822i, a 2 =0.1040+0.4822i,
a 3＝0.1040+0.4822i, a 3 =0.1040+0.4822i,
a 4＝0.0559-0.3257i, a 4 =0.0559-0.3257i,
a 5＝0.0397+0.2857i, a 5 =0.0397+0.2857i,
a 6＝0.3366-0.0823i, a 6 =0.3366-0.0823i,
a 7＝-0.1747+0.2902i, a 7 =-0.1747+0.2902i,
a 8＝-0.2129-0.2133i, a 8 =-0.2129-0.2133i,
从而确保w 1＝a 1C 1+a 2C 2+...+a nC n(n＜＝m) Thereby ensuring that w 1 = a 1 C 1 + a 2 C 2 +... + a n C n (n <= m)
应理解，以上表4给出的基向量仅是一个示例，任何其他基向量都可以用来近似表达向量w ir，本领域普通技术人员容易想到的其他任何等效的基向量或替换，都应属于本发明实施例揭露的技术范围。本发明实施例仅以UE具有8天线端口，同时发送2个数据流为例，但本发明实施例并不局限于此。 It should be understood that the base vector given in Table 4 above is only an example, and any other base vector can be used to approximate the expression vector w ir , and any other equivalent base vector or replacement that would be readily apparent to those of ordinary skill in the art should It belongs to the technical scope disclosed in the embodiments of the present invention. The embodiment of the present invention is only an example in which the UE has eight antenna ports and two data streams are simultaneously transmitted, but the embodiment of the present invention is not limited thereto.
通过以上方法，可以获得一组基向量的系数a 1,a 2,......a n，通过对这些系数进行量化，就可以得到一组量化值，方法如下： Through the above method, a set of base vector coefficients a 1 , a 2 , ... a n can be obtained. By quantizing these coefficients, a set of quantized values can be obtained, as follows:
设置门限T，将a i(i＝1...8)的实部I i和虚部Q i分别取绝对值并和T分别进行比较，对I i或Q i的绝对值大于等于T的值用Y1比特表示，小于T的值用Y2比特表示，其中Y1和Y2的最高位比特用于表示符号位，即0表示为正，1表示为负，对I i和Q i分别进行如下量化： Set threshold T, the a i (i = 1 ... 8 ) of the real part and the imaginary part I i Q i and T are the absolute value and comparing each of the absolute values Q i I i is greater than or equal to T, The value is represented by Y1 bit, and the value less than T is represented by Y2 bit, wherein the most significant bit of Y1 and Y2 is used to represent the sign bit, that is, 0 is positive and 1 is negative, and I i and Q i are respectively quantized as follows. :
I i'＝ceil(I i*power(2,Yn-1)),Yn＝Y1或Y2 I i '=ceil(I i *power(2,Yn-1)), Yn=Y1 or Y2
Q i'＝ceil(Q i*power(2,Yn-1)),Yn＝Y1或Y2 Q i '=ceil(Q i *power(2,Yn-1)), Yn=Y1 or Y2
I i'和Q i'即为量化值，并分别用二进制表示，且二进制表示的最高位为符号位，具体表示的比特数依赖于I i和Q i的绝对值是大于等于T还是小于T。同样地，这里并不限定值的比较范围，也可以是大于T，小于等于T。不再赘述。 I i ' and Q i ' are quantized values, and are respectively represented by binary, and the highest bit of the binary representation is a sign bit, and the number of bits specifically represented depends on whether the absolute value of I i and Q i is greater than or equal to T or less than T. . Similarly, the comparison range of values is not limited here, and may be greater than T and less than or equal to T. No longer.
对T的量化，可参考前述量化方法，不再赘述。For the quantization of T, reference may be made to the aforementioned quantization method, and details are not described herein.
在另一种可选方案中，作为一般化，可设置多个门限，可支持2或多种以上的比特长度量化，以使得量化更加精确。例如，T1＝0.4，T2＝0.7，用X1比特对小于T1的量化值进行表示，用X2对[0.4,0.7]区间值进行表示，X3比特对大于T2的量化值进行表示等。应理解，这里的区间范围只是一个示例，并不限定其区间范围的取值，不再赘述。In another alternative, as a generalization, multiple thresholds may be set, and 2 or more bit length quantizations may be supported to make quantization more accurate. For example, T1 = 0.4, T2 = 0.7, the quantized value smaller than T1 is represented by X1 bit, the [0.4, 0.7] interval value is represented by X2, and the quantized value larger than T2 is represented by X3 bit. It should be understood that the range of the interval herein is only an example, and the value of the range of the interval is not limited, and will not be described again.
本实施例以一个量化阈值作为实例，应理解，其他具有多个量化值的表示方法都是本领域普通技术人员容易想到的等效或替换方法，都应属于在本发明揭露的技术范围。This embodiment takes a quantization threshold as an example. It should be understood that other representation methods having multiple quantized values are equivalent or alternative methods that are easily conceived by those skilled in the art, and are all within the technical scope disclosed by the present invention.
通过以上量化方法，就可以得到预编码矩阵W的某个向量的n个基向量系数的2·n个量化值。当支持的UE数据流数(层数)为多个时，则存在多个向量，如，r＝2时，则需要对两个向量分别进行量化。By the above quantization method, 2·n quantized values of n basis vector coefficients of a certain vector of the precoding matrix W can be obtained. When the number of supported UE data streams (layers) is multiple, there are multiple vectors. For example, when r=2, the two vectors need to be separately quantized.
在另一种可选方案中，也可以对系数a 1,a 2,......a n进行归一化处理，即从a i中找出系数范数最大的系数，并对每个系数进行归一化处理： In another alternative, the coefficients a 1 , a 2 , . . . , a n can also be normalized, that is, the coefficient with the largest coefficient norm is found from a i , and each The coefficients are normalized:
假定
Figure PCTCN2018120261-appb-000009
则归一化后，
Figure PCTCN2018120261-appb-000010
assumed
Figure PCTCN2018120261-appb-000009
After normalization,
Figure PCTCN2018120261-appb-000010
在上述实施例中，基向量C i的选取需要指定。通常，考虑到UE，如UE110，支持的天线端口数，定义具有不同端口数的基向量。如表4中，基向量0-3表示具有4天线端口的基向量集，4-17表示具有8天线端口的基向量集。当天线端口数比较多时，如何指示选定的基向量以降低开销是非常重要的。在一种优选的方案中，可以通过指定基向量长度和一个选定的基向量集合来指定。基向量长度表示构成向量的天线端口数，即基向量的元素个数，选定的基向量通过一个比特映射bitmap来进行指示，比如，上述表4中一共有18个基向量，其中8天线端口的基向量有14个(4-17)，因此，可以通过一个具有18比特长度的比特串来表示选定的基向量，比特串的第0位对应第0个基向量，第1位对应第1个基向量，其他每个比特位和基向量依次对应，不再赘述。例如，选定了基向量4-11共8个基向量，则将bitmap中对应的第4到11比特位置为1，其它比特位置为0。在一种优选方案中，表4会按照天线端口数，即向量的元素个数，拆分成多个表，每个表的向量索引都从0开始编号，因此，比特串的长度和表中基向量数量相同，bitmap的每个比特位对应一个向量在表中4中的索引， 比特位置为1所对应的向量表示被选作基向量。 In the above embodiment, the selection of the base vector C i needs to be specified. Generally, a base vector having a different number of ports is defined in consideration of the number of antenna ports supported by the UE, such as the UE 110. As in Table 4, base vectors 0-3 represent base vector sets with 4 antenna ports, and 4-17 represent base vector sets with 8 antenna ports. When the number of antenna ports is relatively large, it is very important to indicate the selected base vector to reduce the overhead. In a preferred arrangement, this can be specified by specifying a base vector length and a selected set of basis vectors. The base vector length indicates the number of antenna ports constituting the vector, that is, the number of elements of the base vector. The selected base vector is indicated by a bit map bitmap. For example, there are a total of 18 base vectors in the above Table 4, of which 8 antenna ports There are 14 base vectors (4-17). Therefore, the selected base vector can be represented by a bit string having a length of 18 bits. The 0th bit of the bit string corresponds to the 0th base vector, and the 1st bit corresponds to the first bit. One base vector, each of the other bits and the base vector correspond in turn, and will not be described again. For example, if a total of 8 basis vectors are selected for the base vectors 4-11, the corresponding 4th to 11th bit positions in the bitmap are set to 1, and the other bit positions are 0. In a preferred solution, Table 4 splits into multiple tables according to the number of antenna ports, that is, the number of elements of the vector, and the vector index of each table is numbered from 0. Therefore, the length of the bit string and the table are The number of base vectors is the same, each bit of the bitmap corresponds to an index of a vector in the table 4, and the vector representation corresponding to the bit position is selected as the base vector.
通过以上量化方法，可以对传输的预编码量化结果信息进行压缩，减小空口传输开销。Through the above quantization method, the transmitted pre-encoded quantization result information can be compressed to reduce the air interface transmission overhead.
图2所示的终端110在收到预编码量化结果信息后，根据之前或当前消息接收到的预编码量化参数信息进行解量化，解量化过程如下：After receiving the precoding quantization result information, the terminal 110 shown in FIG. 2 dequantizes according to the precoding quantization parameter information received by the previous or current message, and the dequantization process is as follows:
1)终端110基于接收到的预编码量化参数信息通过预编码量化参数配置集索引确定量化门限的信息，量化值的比特位数信息，和/或量化方法指示信息。这里假定终端110收到的预编码量化参数信息是包含有预编码量化参数配置集索引的，且量化方法为非均匀量化。这里只是一个示例，预编码量化参数配置集还可能包含其他的参数，应理解，这并不限制包含其他预编码量化参数配置集的信息的任何其他实现。1) The terminal 110 determines the information of the quantization threshold, the bit number information of the quantized value, and/or the quantization method indication information by the precoding quantization parameter configuration set index based on the received precoding quantization parameter information. It is assumed here that the precoding quantization parameter information received by the terminal 110 is included in the precoding quantization parameter configuration set index, and the quantization method is non-uniform quantization. Here is just an example, the precoding quantization parameter configuration set may also contain other parameters, it being understood that this does not limit any other implementation of information containing other precoding quantization parameter configuration sets.
2)终端110根据接收到的预编码量化结果信息，并利用预编码量化参数信息，从预编码量化结果信息中解析出预编码矩阵的向量个数，以及每个向量的范数最大的元素的位置索引im；以第一个向量为例，UE110-130通过信息长度的向量个数和向量长度指示解析出预编码矩阵的向量数，以及每个向量的元素个数m，从而，可以通过信息编码格式获得每个向量的元素的实部长度指示和虚部长度指示，并通过实部长度指示和虚部长度指示确定每个元素的实部和虚部对应的量化值的比特位数信息，并根据量化值的比特位数信息进一步解析出除最大范数位置im的每个元素的实部I和虚部Q的量化值，共2(m-1)个数值，记为X0 k(k＝1～2(m-1))，通过以下方法对X0 k进行解量化： 2) The terminal 110 parses the number of vectors of the precoding matrix from the precoding quantization result information according to the received precoding quantization result information, and uses the precoding quantization parameter information, and the element with the largest norm of each vector The location index im; taking the first vector as an example, the UE 110-130 parses the number of vectors of the precoding matrix by the vector number of the information length and the vector length indication, and the number of elements of each vector, so that the information can be passed. The encoding format obtains a real part length indication and an imaginary part length indication of an element of each vector, and determines a bit number information of a quantized value corresponding to a real part and an imaginary part of each element by a real part length indication and an imaginary part length indication, And further quantizing the quantized value of the real part I and the imaginary part Q of each element except the maximum norm position im according to the bit number information of the quantized value, a total of 2 (m-1) values, denoted as X0 k (k =1 to 2 (m-1)), dequantizing X0 k by the following method:
X1 k＝X0 k/power(2,Y bit),Y bit＝Y1或Y2。 X1 k =X0 k /power(2,Y bit ), Y bit =Y1 or Y2.
其中Y1或Y2为上述获得的每个元素的实部或虚部的量化值的比特位数信息。将得到的解量化后的X1 k进行反变换得到： Wherein Y1 or Y2 is the bit number information of the quantized value of the real or imaginary part of each element obtained as described above. The inverse of the obtained dequantized X1 k is obtained:
X2 k＝cos(X1 k*pi) X2 k =cos(X1 k *pi)
其中函数cos()为余弦函数，以下不再重述。The function cos() is a cosine function, which will not be repeated below.
对X2 k共2(m-1)个数值组成m-1个元素：每两个连续的数值代表一个元素中的实部I和虚部Q，即： A total of 2 (m-1) values for X2 k constitute m-1 elements: every two consecutive values represent the real part I and the imaginary part Q in one element, namely:
Figure PCTCN2018120261-appb-000011
Figure PCTCN2018120261-appb-000011
则m个元素组成向量
Figure PCTCN2018120261-appb-000012
Then m elements make up the vector
Figure PCTCN2018120261-appb-000012
对上述向量
Figure PCTCN2018120261-appb-000013
归一化后得到w i，若此UE在子带或全带调度了r层，即预编码矩阵的向量个数为r，则可重复上述步骤确定其他向量，从而得到预编码矩阵： For the above vector
Figure PCTCN2018120261-appb-000013
After normalization, w i is obtained. If the UE schedules the r layer in the subband or the full band, that is, the number of vectors of the precoding matrix is r, the above steps may be repeated to determine other vectors, thereby obtaining a precoding matrix:
W＝[w 1,...,w r] W=[w 1 ,...,w r ]
在另一种可选的方案中，如果选定的量化方法为比特映射量化，终端110获得预编码量化参数信息，并解析出基向量指示信息后，通过基向量指示信息可以知道预编码矩阵的向量的个数，即预编码的流数或层数r和每个向量的长度，即每个向量的元素的个数。具体的解量化过程如下：In another optional solution, if the selected quantization method is bit mapping quantization, the terminal 110 obtains precoding quantization parameter information, and parses out the base vector indication information, and the base vector indication information can be used to know the precoding matrix. The number of vectors, that is, the precoded stream number or layer number r and the length of each vector, that is, the number of elements of each vector. The specific dequantization process is as follows:
终端110基于接收到的预编码量化参数信息和预编码量化结果信息，以及上述获得的基向量信息，解析出每个基向量的系数，即对n个系数对应的2n个量化值Y i,i＝1～2n进行解量化： The terminal 110 parses the coefficients of each base vector, that is, 2n quantized values Y i , i corresponding to n coefficients, based on the received precoding quantization parameter information and precoding quantization result information, and the obtained base vector information. =1~2n for dequantization:
X i＝Y i/power(2,Yn-1),Yn＝Y1或Y2 X i =Y i /power(2,Yn-1), Yn=Y1 or Y2
将解量化后的值Xi每两个一组进行组合，即获得每个基向量的系数a i的实部和虚部： The dequantized values Xi are combined every two groups, that is, the real and imaginary parts of the coefficients a i of each base vector are obtained:
Figure PCTCN2018120261-appb-000014
Figure PCTCN2018120261-appb-000014
其中，X2i-1为实部，X2i为虚部。Among them, X2i-1 is the real part and X2i is the imaginary part.
基于基向量信息获得：w ir＝a 1C 1+a 2C 2+...+a nC n(n＜＝m),ir＝1～r，其中m为终端110的最大天线端口数。根据子带或全带调度的层数r，获得子带或全带的预编码矩阵为： Obtained based on the base vector information: w ir = a 1 C 1 + a 2 C 2 +... + a n C n (n <= m), ir = 1 r r, where m is the maximum number of antenna ports of the terminal 110 . According to the number of layers r of the subband or the full band scheduling, the precoding matrix of the subband or the full band is obtained as follows:
W＝[w 1,...,w r] W=[w 1 ,...,w r ]
终端110可基于上述解量化而获得的子带或全带的预编码矩阵进行上行MIMO预编码。The terminal 110 may perform uplink MIMO precoding based on the subband or the full band precoding matrix obtained by the above dequantization.
上述主要从基站和终端之间的交互以及基站和终端的量化和解量化的角度对本申请实施例提供的方案进行了介绍。可以理解的是，基站和终端为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的网元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。The solution provided by the embodiment of the present application is mainly introduced from the perspective of the interaction between the base station and the terminal and the quantization and dequantization of the base station and the terminal. It can be understood that the base station and the terminal include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in conjunction with the network elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
本申请实施例可以根据上述方法示例对基站和终端进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。The embodiments of the present application may divide the functional modules of the base station and the terminal according to the foregoing method. For example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
在采用对应各个功能划分各个功能模块的情况下，图8示出了上述实施例中所涉及的终端的一种可能的结构示意图，终端800包括：接收单元801、处理单元802和发送单元803。其中，接收单元801用于终端执行图2中的接收预编码量化结果信息的步骤201，接收单元801还用于终端接收预编码量化参数信息。可选的，接收单元801还用于终端执行预编码量化参数配置集索引和预编码量化参数配置集的对应关系的接收；处理单元802用于支持终端获取预编码量化参数信息，还用于根据预编码量化结果信息和预编码量化参数信息确定预编码矩阵，根据预编码矩阵对数据流进行预编码；可选的，处理单元802还用于获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系，用于根据所述接收单元801接收的所述预编码量化参数配置集索引以及所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取所述预编码量化参数配置集的信息；发送单元803用于支持终端发送经过预编码的数据流给基站。FIG. 8 is a schematic diagram showing a possible structure of a terminal involved in the foregoing embodiment. The terminal 800 includes a receiving unit 801, a processing unit 802, and a sending unit 803. The receiving unit 801 is used by the terminal to perform the step 201 of receiving the precoding quantization result information in FIG. 2, and the receiving unit 801 is further configured to receive the precoding quantization parameter information by the terminal. Optionally, the receiving unit 801 is further configured to: the terminal performs the receiving of the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set; the processing unit 802 is configured to support the terminal to obtain the precoding quantization parameter information, and is further configured to The precoding quantization result information and the precoding quantization parameter information determine a precoding matrix, and the data stream is precoded according to the precoding matrix; optionally, the processing unit 802 is further configured to obtain a precoding quantization parameter configuration set index and a precoding quantization parameter. Corresponding relationship of the configuration set, configured to obtain the precoding according to the precoding quantization parameter configuration set index received by the receiving unit 801 and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set The information of the parameter configuration set is quantized; the sending unit 803 is configured to support the terminal to send the pre-coded data stream to the base station.
在硬件实现上，上述接收单元801可以为接收器，处理单元802可以为处理器；发送单元803可以为发送器，接收器和发送器可以构成通信接口。In hardware implementation, the receiving unit 801 may be a receiver, the processing unit 802 may be a processor, the sending unit 803 may be a transmitter, and the receiver and the transmitter may constitute a communication interface.
图9所示，为本申请的实施例提供的上述实施例中所涉及终端的一种可能的逻辑结构示意图。终端900包括：处理器902。在本申请的实施例中，处理器902用于对该终端的动作进行控制管理，例如，处理器902用于支持终端执行获取预编码量化参数信息，还用于根据预编码量化结果信息和预编码量化参数信息确定预编码矩阵，根据预编码矩阵对数据流进行预编码，还用于获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系，用于根据预编码量化参数配置集索引以及所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取所述预编码量化参数配置集的信息。可选的，终端还可以包括存储器901，通信接口903或总线904。其中，该存储器1101，用于存储终端的代码和数据。通信接口903 用于终端与基站进行通信，进行数据的收发。通信接口903，处理器902、以及存储器901通过总线904相互连接。处理器902可以从通信接口903或存储器901通过总线904接收数据，或者将数据通过总线904传输给存储器901进行存储或者发送到通信接口903进行发送。FIG. 9 is a schematic diagram showing a possible logical structure of a terminal involved in the foregoing embodiment provided by an embodiment of the present application. The terminal 900 includes a processor 902. In the embodiment of the present application, the processor 902 is configured to perform control management on the action of the terminal. For example, the processor 902 is configured to support the terminal to perform acquiring pre-encoding quantization parameter information, and is further configured to perform pre-coding quantization result information and pre- The coded quantization parameter information determines a precoding matrix, precodes the data stream according to the precoding matrix, and is further configured to obtain a correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set, configured to configure according to the precoding quantization parameter The set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set acquire information of the precoding quantization parameter configuration set. Optionally, the terminal may further include a memory 901, a communication interface 903 or a bus 904. The memory 1101 is configured to store code and data of the terminal. The communication interface 903 is used for the terminal to communicate with the base station to perform data transmission and reception. The communication interface 903, the processor 902, and the memory 901 are connected to one another via a bus 904. The processor 902 can receive data from the communication interface 903 or the memory 901 via the bus 904, or transfer the data to the memory 901 via the bus 904 for storage or transmission to the communication interface 903 for transmission.
其中，处理器902可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线904可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。The processor 902 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like. The bus 904 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.
在采用对应各个功能划分各个功能模块的情况下，图10示出了上述实施例中所涉及的基站的一种可能的结构示意图，基站1000包括：接收单元1001、处理单元1002和发送单元1003。其中，发送单元1003用于支持图2中发送的预编码量化结果信息的步骤201，发送单元1003还用于发送预编码量化参数信息。可选地，发送单元1003还可以用于向所述终端发送预编码量化参数配置集索引和预编码量化参数配置集的对应关系，所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系通过无线资源控制(RRC)信令,或者MAC层控制信令(MAC CE)进行发送；接收单元1001用于基站接收终端发送的数据流，所述数据流是利用所述预编码量化结果信息和所述预编码量化参数信息获得的预编码矩阵进行编码的；处理单元1002用于基站支持图2中的确定预编码量化参数信息，生成预编码量化结果信息的步骤200。FIG. 10 is a schematic diagram showing a possible structure of a base station involved in the foregoing embodiment. The base station 1000 includes a receiving unit 1001, a processing unit 1002, and a sending unit 1003. The sending unit 1003 is configured to support the step 201 of precoding quantization result information sent in FIG. 2, and the sending unit 1003 is further configured to send precoding quantization parameter information. Optionally, the sending unit 1003 is further configured to send, to the terminal, a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set, the precoding quantization parameter configuration set index and a precoding quantization parameter configuration set. The corresponding relationship is transmitted by radio resource control (RRC) signaling, or MAC layer control signaling (MAC CE); the receiving unit 1001 is configured to receive, by the base station, a data stream sent by the terminal, where the data stream is quantized by using the precoding. The result information and the precoding matrix obtained by the precoding quantization parameter information are encoded; the processing unit 1002 is configured to perform the step 200 of the base station supporting the precoding quantization parameter information in FIG. 2 to generate precoding quantization result information.
在硬件实现上，上述接收单元1001可以为接收器，处理单元1002可以为处理器；发送单元1003可以为发送器，接收器和发送器可以构成通信接口。In hardware implementation, the receiving unit 1001 may be a receiver, the processing unit 1002 may be a processor, the sending unit 1003 may be a transmitter, and the receiver and the transmitter may constitute a communication interface.
图11所示，为本申请的实施例提供的上述实施例中所涉及基站的一种可能的逻辑结构示意图。基站1100包括：处理器1102。在本申请的实施例中，处理器1102用于对该终端的动作进行控制管理，例如，处理器1102用于支持基站执行图2中的确定预编码量化参数信息，生成预编码量化结果信息的步骤200。可选的，基站还可以包括存储器901，通信接口903或总线904。其中，该存储器1101，该存储器用于存储基站的代码和数据。通信接口1103用于基站与终端进行通信，进行数据的收发。通信接口1103，处理器1102、以及存储器1101通过总线1104相互连接。处理器1102可以从通信接口1103或存储器1101通过总线1104接收数据，或者将数据通过总线1104传输给存储器1101进行存储或者发送到通信接口1103进行发送。FIG. 11 is a schematic diagram showing a possible logical structure of a base station involved in the foregoing embodiment provided by an embodiment of the present application. The base station 1100 includes a processor 1102. In the embodiment of the present application, the processor 1102 is configured to perform control management on the action of the terminal. For example, the processor 1102 is configured to support the base station to perform the determining precoding quantization parameter information in FIG. 2, and generate precoding quantization result information. Step 200. Optionally, the base station may further include a memory 901, a communication interface 903, or a bus 904. The memory 1101 is configured to store code and data of the base station. The communication interface 1103 is used for communication between the base station and the terminal to perform data transmission and reception. The communication interface 1103, the processor 1102, and the memory 1101 are connected to one another via a bus 1104. The processor 1102 can receive data from the communication interface 1103 or the memory 1101 via the bus 1104, or transfer the data to the memory 1101 via the bus 1104 for storage or transmission to the communication interface 1103 for transmission.
其中，处理器1102可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线1104可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图11中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。The processor 1102 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like. The bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.
本申请实施例中所述的基站或终端，还可以是一种芯片系统。其中，所述芯片系统中包 含至少一个芯片，还可以包含其他分立器件。所述芯片系统可以应用于基站或者终端，以支持所述基站或者终端完成本申请实施例中提供的方法。在有些实施例中，上述终端或基站的处理器、存储器和通信接口可以在单独的芯片上实现。而在另一些实施例中，处理器和存储器可以被集成到一个芯片，而通信接口在单独的芯片上。在另一些实施例中，处理器和通信接口(包含收发器电路)被集成到一个芯片，而存储器在单独的芯片上。在另一些实施例中，处理器、存储器和通信接口被集成在同一个芯片上。The base station or terminal described in the embodiment of the present application may also be a chip system. Wherein, the chip system includes at least one chip, and may also include other discrete devices. The chip system can be applied to a base station or a terminal to support the base station or the terminal to complete the method provided in the embodiment of the present application. In some embodiments, the processor, memory, and communication interface of the terminal or base station described above can be implemented on a separate chip. In still other embodiments, the processor and memory can be integrated into one chip while the communication interface is on a separate chip. In other embodiments, the processor and communication interface (including transceiver circuitry) are integrated into one chip while the memory is on a separate chip. In other embodiments, the processor, memory, and communication interface are integrated on the same chip.
在本申请的另一实施例中，还提供一种可读存储介质，可读存储介质中存储有计算机执行指令，一个设备(可以是单片机，芯片等)或者处理器从存储介质中加载计算机执行指令，以执行所述基站或者终端完成本申请实施例中提供的方法。前述的可读存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。In another embodiment of the present application, a readable storage medium is further provided, wherein the readable storage medium stores computer execution instructions, a device (which may be a single chip microcomputer, a chip, etc.) or the processor loads the computer from the storage medium to execute The instructions are executed to execute the method provided in the embodiment of the present application by executing the base station or the terminal. The aforementioned readable storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
在本申请的另一实施例中，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执行指令，该计算机执行指令存储在计算机可读存储介质中；设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令以实现本申请实施例中提供的方法。In another embodiment of the present application, there is also provided a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the device may be The read storage medium reads the computer to execute the instructions, and the at least one processor executes the computer to execute the instructions to implement the methods provided in the embodiments of the present application.
在本申请的另一实施例中，还提供一种通信系统，该通信系统包括一个基站以及至少一个终端。其中，基站用于执行图2所提供的预编码方法中基站的步骤；和/或，终端用于执行图2所提供的预编码方法中终端的步骤。In another embodiment of the present application, a communication system is also provided, the communication system including a base station and at least one terminal. The base station is configured to perform the steps of the base station in the precoding method provided in FIG. 2; and/or the terminal is configured to perform the steps of the terminal in the precoding method provided in FIG. 2.
在本申请实施例中，基站为终端提供预编码矩阵以适应信道变化，从而使得终端采用适应信道变化的预编码以降低流间干扰，提升系统容量。In the embodiment of the present application, the base station provides a precoding matrix for the terminal to adapt to the channel change, so that the terminal adopts precoding that adapts to the channel change to reduce inter-stream interference and improve system capacity.
最后应说明的是：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，任何在本申请揭露的技术范围内的变化或替换，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。Finally, it should be noted that the above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered in the present application. Within the scope of protection of the application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims (51)

  1. 一种MIMO系统中预编码的方法，其特征在于，包括：A method for precoding in a MIMO system, comprising:
    终端接收网络节点发送的预编码量化结果信息；Receiving, by the terminal, precoding quantization result information sent by the network node;
    所述终端根据接收到的所述预编码量化结果信息和预编码量化参数信息确定预编码矩阵；The terminal determines a precoding matrix according to the received precoding quantization result information and precoding quantization parameter information;
    所述终端根据所述预编码矩阵对数据流进行预编码。The terminal precodes the data stream according to the precoding matrix.
  2. 根据权利要求1所述的方法，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The method according to claim 1, wherein the precoding quantized result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的向量的个数和所述每个向量的元素的个数，或者指示所述量化值的总的字节长度。The length of the information, used to indicate the number of vectors of the precoding matrix included in the quantized value and the number of elements of each vector, or the total byte length of the quantized value.
  3. 根据权利要求2所述的方法，其特征在于，所述预编码量化结果信息承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中。The method according to claim 2, wherein the precoding quantization result information is carried in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel ( PDCCH) indicated in the physical downlink shared channel PDSCH.
  4. 根据权利要求1所述的方法，其特征在于，所述终端在接收所述预编码量化结果信息之前，还包括：获取所述预编码量化参数信息。The method according to claim 1, wherein the receiving, before receiving the precoding quantization result information, the method further comprises: acquiring the precoding quantization parameter information.
  5. 根据权利要求1所述的方法，其特征在于，所述预编码量化参数信息包括预编码量化参数配置集的信息，或预编码量化参数配置集索引。The method according to claim 1, wherein the precoding quantization parameter information comprises information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index.
  6. 根据权利要求5所述的方法，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The method according to claim 5, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  7. 根据权利要求1或4-6任一项所述的方法，其特征在于，所述预编码量化参数信息承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。The method according to any one of claims 1 to 4, wherein the precoding quantization parameter information is carried in a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE), Or in Radio Resource Control (RRC) signaling.
  8. 根据权利要求6所述的方法，其特征在于，进一步包括：所述终端获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系；所述终端根据所述预编码量化参数配置集索引以及所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取所述预编码量化参数配置集的信息。The method according to claim 6, further comprising: the terminal acquiring a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set; and the terminal according to the precoding quantization parameter configuration set The index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set acquire information of the precoding quantization parameter configuration set.
  9. 一种MIMO系统中预编码的方法，其特征在于，包括：A method for precoding in a MIMO system, comprising:
    所述网络节点向所述终端发送预编码量化结果信息；Transmitting, by the network node, precoding quantized result information to the terminal;
    所述网络节点接收所述终端发送的数据流，所述数据流是利用所述预编码量化结果信息和预编码量化参数信息获得的预编码矩阵进行编码的。And the network node receives the data stream sent by the terminal, where the data stream is encoded by using a precoding matrix obtained by using the precoding quantization result information and precoding quantization parameter information.
  10. 根据权利要求9所述的方法，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The method according to claim 9, wherein the precoding quantized result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各列向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each column vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的所述向量的个数和每个所述列向量的元素的个数，或者指示所述量化值的总的字节长度。And an information length, used to indicate the number of the vectors of the precoding matrix and the number of elements of each of the column vectors, or the total byte length of the quantized value.
  11. 根据权利要求9-10所述的方法，其特征在于，所述预编码量化结果信息承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中。The method according to claims 9-10, characterized in that the precoding quantization result information is carried in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or physical downlink control The physical downlink shared channel PDSCH indicated by the channel (PDCCH).
  12. 根据权利要求9所述的方法，其特征在于，包括：所述网络节点在向所述终端发送所述预编码量化结果信息之前，进一步包括：所述网络节点向所述终端发送所述预编码量化参数 信息。The method according to claim 9, comprising: said network node, before transmitting said precoding quantized result information to said terminal, further comprising: said network node transmitting said precoding to said terminal Quantize parameter information.
  13. 根据权利要求9所述的方法，其特征在于，所述预编码量化参数信息包括预编码量化参数配置集的信息，或者预编码量化参数配置集索引信息。The method according to claim 9, wherein the precoding quantization parameter information comprises information of a precoding quantization parameter configuration set or precoding quantization parameter configuration set index information.
  14. 根据权利要求13所述的方法，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The method according to claim 13, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  15. 根据权利要求9或12-14任一项所述的方法，其特征在于，所述预编码量化参数信息承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中。The method according to any one of claims 9 or 12, wherein the precoding quantization parameter information is carried in a Physical Downlink Control Channel (PDCCH) or MAC Layer Control Signaling (MAC CE), Or in Radio Resource Control (RRC) signaling.
  16. 根据权利要求14所述的方法，其特征在于，进一步包括：所述网络节点向所述终端发送预编码量化参数配置集索引和预编码量化参数配置集的对应关系。The method according to claim 14, further comprising: said network node transmitting, to said terminal, a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set.
  17. 一种终端，其特征在于，包括：A terminal, comprising:
    接收单元，用于接收网络设备发送的预编码量化结果信息；a receiving unit, configured to receive precoding quantization result information sent by the network device;
    处理单元，用于根据所述预编码量化结果信息和预编码量化参数信息确定预编码矩阵，根据所述预编码矩阵对数据流进行预编码；a processing unit, configured to determine a precoding matrix according to the precoding quantization result information and precoding quantization parameter information, and precode the data stream according to the precoding matrix;
    发送单元，用于发送所述经过预编码的数据流给所述网络设备。And a sending unit, configured to send the pre-coded data stream to the network device.
  18. 根据权利要求17所述的终端，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The terminal according to claim 17, wherein the precoding quantization result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的向量的个数和所述每个向量的元素的个数，或者指示所述量化值的总的字节长度。The length of the information, used to indicate the number of vectors of the precoding matrix included in the quantized value and the number of elements of each vector, or the total byte length of the quantized value.
  19. 根据权利要求18所述的终端，其特征在于，所述接收单元，用于接收承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中的所述预编码量化结果信息。The terminal according to claim 18, wherein the receiving unit is configured to receive a bearer in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel. The precoding quantized result information in the physical downlink shared channel PDSCH indicated by (PDCCH).
  20. 根据权利要求17所述的终端，其特征在于，进一步包括：所述处理单元，获取所述网络节点发送的所述预编码量化参数信息。The terminal according to claim 17, further comprising: said processing unit, acquiring said precoding quantization parameter information sent by said network node.
  21. 根据权利要求17所述的终端，其特征在于，包括：The terminal according to claim 17, comprising:
    所述预编码量化参数信息包括预编码量化参数配置集的信息，或预编码量化参数配置集索引。The precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index.
  22. 根据权利要求21所述的终端，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The terminal according to claim 21, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  23. 根据权利要求20-22所述的终端，其特征在于，所述接收单元，还用于接收承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中的所述预编码量化参数信息。The terminal according to any one of claims 20-22, wherein the receiving unit is further configured to receive a physical downlink control channel (PDCCH), or a MAC layer control signaling (MAC CE), or a radio resource. The precoding quantization parameter information in control (RRC) signaling.
  24. 根据权利要求22所述的终端，其特征在于，所述处理单元，还用于获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系，用于根据所述接收单元接收的所述预编码量化参数配置集索引以及所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取所述预编码量化参数配置集的信息。The terminal according to claim 22, wherein the processing unit is further configured to acquire a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set, according to the received by the receiving unit. The precoding quantization parameter configuration set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set acquire information of the precoding quantization parameter configuration set.
  25. 一种网络设备，其特征在于，包括：A network device, comprising:
    处理单元，用于生成预编码量化结果信息；a processing unit, configured to generate precoding quantized result information;
    发送单元，用于向终端发送所述预编码量化参数信息和预编码量化结果信息；a sending unit, configured to send the precoding quantization parameter information and precoding quantization result information to the terminal;
    接收单元，用于接收所述终端发送的数据流，所述数据流是利用所述预编码量化结果信息和所述预编码量化参数信息获得的预编码矩阵进行编码的。And a receiving unit, configured to receive a data stream sent by the terminal, where the data stream is encoded by using a precoding matrix obtained by using the precoding quantization result information and the precoding quantization parameter information.
  26. 根据权利要求25所述的网络设备，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The network device according to claim 25, wherein the precoding quantization result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各列向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each column vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的所述向量的个数和每个所述列向量的元素的个数，或者指示所述量化值的总的字节长度。And an information length, used to indicate the number of the vectors of the precoding matrix and the number of elements of each of the column vectors, or the total byte length of the quantized value.
  27. 根据权利要求26所述的网络设备，其特征在于，所述发送单元，用于通过无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH发送所述预编码量化结果信息。The network device according to claim 26, wherein the sending unit is configured to use Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel ( The physical downlink shared channel PDSCH indicated by the PDCCH) transmits the precoding quantized result information.
  28. 根据权利要求25所述的网络设备，其特征在于，包括：所述发送单元在向所述终端发送所述预编码量化结果信息之前，进一步包括：所述发送单元向所述终端发送所述预编码量化参数信息。The network device according to claim 25, further comprising: before the sending, by the sending unit, the precoding quantization result information to the terminal, the method further includes: the sending unit sending the pre Encoding quantization parameter information.
  29. 根据权利要求25所述的网络设备，其特征在于，所述预编码量化参数信息包括预编码量化参数配置集的信息，或者预编码量化参数配置集索引。The network device according to claim 25, wherein the precoding quantization parameter information comprises information of a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
  30. 根据权利要求29所述的网络设备，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The network device according to claim 29, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  31. 根据权利要求28-30任一权利要求所述的网络设备，其特征在于，所述发送单元，用于通过物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令发送所述预编码量化参数信息。The network device according to any one of claims 28-30, wherein the sending unit is configured to pass a Physical Downlink Control Channel (PDCCH), or MAC Layer Control Signaling (MAC CE), or Radio resource control (RRC) signaling transmits the precoding quantization parameter information.
  32. 根据权利要求30所述的网络设备，其特征在于，所述发送单元，还用于向所述终端发送预编码量化参数配置集索引和预编码量化参数配置集的对应关系。The network device according to claim 30, wherein the sending unit is further configured to send, to the terminal, a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set.
  33. 一种终端，其特征在于，包括：A terminal, comprising:
    接收器，用于接收网络设备发送的预编码量化结果信息；a receiver, configured to receive precoding quantized result information sent by the network device;
    处理器，用于根据所述预编码量化结果信息和预编码量化参数信息确定预编码矩阵，根据所述预编码矩阵对数据流进行预编码；a processor, configured to determine a precoding matrix according to the precoding quantization result information and precoding quantization parameter information, and precode the data stream according to the precoding matrix;
    发送器，用于发送所述经过预编码的数据流给所述网络设备。And a transmitter, configured to send the precoded data stream to the network device.
  34. 根据权利要求33所述的终端，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The terminal according to claim 33, wherein the precoding quantization result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的向量的个数和所述每个向量的元素的个数，或者指示所述量化值的总的字节长度。The length of the information, used to indicate the number of vectors of the precoding matrix included in the quantized value and the number of elements of each vector, or the total byte length of the quantized value.
  35. 根据权利要求34所述的终端，其特征在于，所述接收器，具体用于接收承载在无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH中的所述预编码量化结果信息。The terminal according to claim 34, wherein the receiver is specifically configured to receive a bearer in Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or physical downlink control. The precoding quantized result information in the physical downlink shared channel PDSCH indicated by the channel (PDCCH).
  36. 根据权利要求33所述的终端，其特征在于，进一步包括：所述处理器，获取所述网络节点发送的所述预编码量化参数信息。The terminal according to claim 33, further comprising: said processor, acquiring said precoding quantization parameter information sent by said network node.
  37. 根据权利要求33所述的终端，其特征在于，包括：The terminal according to claim 33, comprising:
    所述预编码量化参数信息包括预编码量化参数配置集的信息，或预编码量化参数配置集索引。The precoding quantization parameter information includes information of a precoding quantization parameter configuration set, or a precoding quantization parameter configuration set index.
  38. 根据权利要求37所述的终端，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The terminal according to claim 37, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  39. 根据权利要求36-38所述的终端，其特征在于，所述接收器，还用于接收承载在物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令中的所述预编码量化参数信息。The terminal according to claim 36-38, wherein the receiver is further configured to receive a physical downlink control channel (PDCCH), or a MAC layer control signaling (MAC CE), or a radio resource. The precoding quantization parameter information in control (RRC) signaling.
  40. 根据权利要求38所述的终端，其特征在于，所述处理器，还用于获取预编码量化参数配置集索引和预编码量化参数配置集的对应关系，用于根据所述接收器接收的所述预编码量化参数配置集索引以及所述预编码量化参数配置集索引和预编码量化参数配置集的对应关系获取所述预编码量化参数配置集的信息。The terminal according to claim 38, wherein the processor is further configured to acquire a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set, according to the receiver receiving The precoding quantization parameter configuration set index and the correspondence between the precoding quantization parameter configuration set index and the precoding quantization parameter configuration set acquire information of the precoding quantization parameter configuration set.
  41. 一种网络设备，其特征在于，包括：A network device, comprising:
    处理器，用于生成预编码量化结果信息；a processor, configured to generate precoding quantized result information;
    发送器，用于向终端发送所述预编码量化参数信息和预编码量化结果信息；a transmitter, configured to send the precoding quantization parameter information and precoding quantization result information to a terminal;
    接收器，用于接收所述终端发送的数据流，所述数据流是利用所述预编码量化结果信息和所述预编码量化参数信息获得的预编码矩阵进行编码的。And a receiver, configured to receive a data stream sent by the terminal, where the data stream is encoded by using a precoding matrix obtained by using the precoding quantization result information and the precoding quantization parameter information.
  42. 根据权利要求41所述的网络设备，其特征在于，所述预编码量化结果信息，包括如下至少一种信息：The network device according to claim 41, wherein the precoding quantization result information comprises at least one of the following information:
    量化值，是指所述预编码矩阵的每个向量的每个元素的实部和虚部的量化值；a quantized value refers to a quantized value of a real part and an imaginary part of each element of each vector of the precoding matrix;
    最大值索引，用于指示所述预编码矩阵的各列向量的所有元素的最大范数值所在的位置；a maximum index indicating a location where a maximum norm value of all elements of each column vector of the precoding matrix is located;
    量化值长度指示，用于指示所述量化值的比特位数；a quantized value length indication for indicating a bit number of the quantized value;
    信息长度，用于指示所述量化值包含的所述预编码矩阵的所述向量的个数和每个所述列向量的元素的个数，或者指示所述量化值的总的字节长度。And an information length, used to indicate the number of the vectors of the precoding matrix and the number of elements of each of the column vectors, or the total byte length of the quantized value.
  43. 根据权利要求42所述的网络设备，其特征在于，所述发送器，用于通过无线资源控制(RRC)信令，或者MAC层控制信令(MAC CE)，或者物理下行链路控制信道(PDCCH)指示的物理下行共享信道PDSCH发送所述预编码量化结果信息。The network device according to claim 42, wherein the transmitter is configured to use Radio Resource Control (RRC) signaling, or MAC layer control signaling (MAC CE), or a physical downlink control channel ( The physical downlink shared channel PDSCH indicated by the PDCCH) transmits the precoding quantized result information.
  44. 根据权利要求41所述的网络设备，其特征在于，包括：所述发送器在向所述终端发送所述预编码量化结果信息之前，进一步包括：所述发送器向所述终端发送所述预编码量化参数信息。The network device according to claim 41, comprising: said transmitter, before transmitting said precoding quantized result information to said terminal, further comprising: said transmitter transmitting said pre-order to said terminal Encoding quantization parameter information.
  45. 根据权利要求41所述的网络设备，其特征在于，所述预编码量化参数信息包括预编码量化参数配置集的信息，或者预编码量化参数配置集索引。The network device according to claim 41, wherein the precoding quantization parameter information comprises information of a precoding quantization parameter configuration set or a precoding quantization parameter configuration set index.
  46. 根据权利要求44所述的网络设备，其特征在于，所述预编码量化参数配置集包括如下至少一种信息：The network device according to claim 44, wherein the precoding quantization parameter configuration set comprises at least one of the following information:
    量化门限的信息，量化值的比特位数信息，量化方法指示信息，带宽指示信息，基向量指示信息。The information of the quantization threshold, the bit number information of the quantized value, the quantization method indication information, the bandwidth indication information, and the base vector indication information.
  47. 根据权利要求44-46任一权利要求所述的网络设备，其特征在于，所述发送器，具体用于通过物理下行链路控制信道(PDCCH)，或者MAC层控制信令(MAC CE)，或无线资源控制(RRC)信令发送所述预编码量化参数信息。The network device according to any one of claims 44 to 46, wherein the transmitter is specifically configured to pass a physical downlink control channel (PDCCH) or MAC layer control signaling (MAC CE). Or the radio resource control (RRC) signaling sends the precoding quantization parameter information.
  48. 根据权利要求46所述的网络设备，其特征在于，所述发送器，还用于向所述终端发送预编码量化参数配置集索引和预编码量化参数配置集的对应关系。The network device according to claim 46, wherein the transmitter is further configured to send, to the terminal, a correspondence between a precoding quantization parameter configuration set index and a precoding quantization parameter configuration set.
  49. 一种可读存储介质，其特征在于，所述可读存储介质上存储有程序，当所述程序运行时，实现如权利要求1-16任一项所述的预编码方法。A readable storage medium, characterized in that the readable storage medium stores a program, and when the program is run, implements the precoding method according to any one of claims 1-16.
  50. 一种包含指令的计算机程序产品，其特征在于，所述计算机程序产品运行时，实现如权利要求1-16任一项所述的预编码方法。A computer program product comprising instructions, wherein the computer program product, when executed, implements the precoding method of any one of claims 1-16.
  51. 一种芯片系统，其特征在于，所述设备包括存储器、处理器，所述存储器中存储代码和数据，所述存储器与所述处理器耦合，所述处理器运行所述存储器中的代码使得所述设备执行权利要求1-8任一项所述的数据传输方法，或者执行权利要求8-19任一项所述的数据传输方法。A chip system, characterized in that the device comprises a memory, a processor in which code and data are stored, the memory being coupled to the processor, the processor running code in the memory such that The device performs the data transmission method according to any one of claims 1 to 8, or the data transmission method according to any one of claims 8 to 19.
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