WO2018127180A1 - 一种参考信号传输方法及装置 - Google Patents

一种参考信号传输方法及装置 Download PDF

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Publication number
WO2018127180A1
WO2018127180A1 PCT/CN2018/071784 CN2018071784W WO2018127180A1 WO 2018127180 A1 WO2018127180 A1 WO 2018127180A1 CN 2018071784 W CN2018071784 W CN 2018071784W WO 2018127180 A1 WO2018127180 A1 WO 2018127180A1
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WO
WIPO (PCT)
Prior art keywords
reference signal
phase noise
noise reference
mapped
subcarriers
Prior art date
Application number
PCT/CN2018/071784
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English (en)
French (fr)
Inventor
孙裕
秦熠
栗忠峰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18736008.6A priority Critical patent/EP3531608A4/en
Publication of WO2018127180A1 publication Critical patent/WO2018127180A1/zh
Priority to US16/443,714 priority patent/US20190305902A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H04L5/0025—Spatial division following the spatial signature of the channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided

Definitions

  • the present application relates to the field of mobile communications technologies, and in particular, to a reference signal transmission method and apparatus.
  • the 3rd Generation Partnership Project (3GPP) in the Next Generation Evolutionary Radio System (New Radio, NR) incorporates high frequency bands into the design of the system.
  • 3GPP 3rd Generation Partnership Project
  • Next Generation Evolutionary Radio System NR
  • PN phase noise
  • the carrier frequency increases, the phase noise power increases, so the effect of phase noise is not negligible, and the phase noise needs to be estimated at the receiving end using the reference signal.
  • phase noise compensation reference signal can be used to estimate phase noise.
  • the phase compensation reference signal needs to be mapped to the time-frequency resource for transmission.
  • the phase compensation reference signal occupies more time-frequency resources.
  • the present application provides a reference signal transmission method and apparatus for reducing the time-frequency resource occupancy of a reference signal.
  • a reference signal sending method including:
  • the base station sends the first reference signal and the second reference signal, where the first reference signal is sent through the first group of antenna ports, and the second reference signal is sent through the second group of antenna ports, where the first group of antenna ports includes At least two antenna ports, the second group of antenna ports including at least two antenna ports;
  • the time-frequency resources of the second reference signal mapping are the same; or
  • the time-frequency resources of the second reference signal mapping transmitted on at least two of the antenna ports of the second group of antenna ports are the same.
  • the second reference signals transmitted on different ports are mapped to the same time-frequency resource, which reduces the time-frequency resource occupation.
  • the method further includes:
  • the base station sends a first signaling, where the first signaling indicates a correspondence between the first group of antenna ports and the second group of antenna ports.
  • the method further includes:
  • the base station sends a second signaling, where the second signaling indicates that the first reference signal and the second reference signal have the same reference signal type or have a quasi co-location QCL relationship.
  • the method further includes:
  • the base station sends a third signaling, where the third signaling indicates a reference signal type of the first reference signal and the second reference signal.
  • the reference signal type includes at least one of: a reference signal precoding, a channel response, and a downlink transmit beam.
  • the number of subcarriers to which the second reference signal is mapped in different scheduling bandwidth ranges is one or more constants ;
  • the number of subcarriers to which the second reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the second reference signal is used by at least two terminals to estimate one or a combination of the following information: phase noise, phase deflection, And frequency offset.
  • the first reference signal is used for channel estimation
  • the second reference signal is used for estimating phase noise or phase deflection or frequency offset. shift.
  • a reference signal receiving method including:
  • the terminal receives the first reference signal and the second reference signal sent by the base station, where the first reference signal is sent by the base station through the first group of antenna ports, and the second reference signal is that the base station passes the second group Transmitted by the antenna port, the first group of antenna ports includes at least two antenna ports, and the second group of antenna ports includes at least two antenna ports; the time-frequency resources of the second reference signal mapping are the same; or The time-frequency resources of the second reference signal mapping sent on at least two of the antenna ports of the second group of antenna ports are the same.
  • the second reference signals transmitted on different ports are mapped to the same time-frequency resource, which reduces the time-frequency resource occupation.
  • the method further includes:
  • the terminal receives the first signaling sent by the base station, and the first signaling indicates a correspondence between the first group of antenna ports and the second group of antenna ports.
  • the method further includes:
  • the terminal receives the second signaling sent by the base station, where the second signaling indicates that the first reference signal and the second reference signal have the same reference signal type or have a quasi co-location QCL relationship.
  • the method further includes:
  • the terminal receives the third signaling sent by the base station, where the third signaling indicates a reference signal type of the first reference signal and the second reference signal.
  • the reference signal type includes at least one of the following: a reference signal precoding, a channel response, and a downlink transmit beam.
  • the number of subcarriers to which the second reference signal is mapped in different scheduling bandwidth ranges is one or more constants ;
  • the number of subcarriers to which the second reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the second reference signal is used by at least two terminals to estimate one or a combination of the following information: phase noise, phase deflection, And frequency offset.
  • the method further includes: performing, by the terminal, channel estimation according to the first reference signal, according to the second reference signal One or a combination of the following information is estimated: phase noise, phase deflection, and frequency offset.
  • a base station including:
  • a processor configured to generate a first reference signal and a second reference signal
  • a transceiver configured to send the first reference signal through a first group of antenna ports and send the second reference signal through a second group of antenna ports;
  • the first group of antenna ports includes at least two antenna ports, and the second group of antenna ports includes at least two antenna ports;
  • the time-frequency resources of the second reference signal mapping are the same; or
  • the time-frequency resources of the second reference signal mapping transmitted on at least two of the antenna ports of the second group of antenna ports are the same.
  • the transceiver is further configured to send a first signaling, where the first signaling indicates the first group of antenna ports and the second group of antennas Correspondence of ports.
  • the transceiver is further configured to send a second signaling, where the second signaling indicates the A reference signal has the same reference signal type as the second reference signal or has a quasi-co-located QCL relationship.
  • the transceiver is further configured to send a third signaling, where the third signaling indicates the A reference signal and a reference signal type of the second reference signal.
  • the reference signal type includes at least one of the following: a reference signal precoding, a channel response, and a downlink transmit beam.
  • the number of subcarriers to which the second reference signal is mapped in different scheduling bandwidth ranges is one or more constants ;
  • the number of subcarriers to which the second reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the second reference signal is used by at least two terminals to estimate one or a combination of the following information: phase noise, phase deflection, And frequency offset.
  • the first reference signal is used for channel estimation
  • the second reference signal is used for estimating phase noise or phase deflection or frequency Offset.
  • a terminal including:
  • a transceiver configured to receive a first reference signal and a second reference signal sent by the base station, where the first reference signal is sent by the base station by using a first group of antenna ports, and the second reference signal is the base station Transmitting, by the second group of antenna ports, the first group of antenna ports includes at least two antenna ports, and the second group of antenna ports includes at least two antenna ports; the time-frequency resources of the second reference signal mapping are the same; Or the time-frequency resources of the second reference signal mapping sent on at least two of the antenna ports of the second group of antenna ports are the same;
  • a processor configured to perform channel estimation according to the first reference signal, and estimate one or a combination of the following information according to the second reference signal: phase noise, phase deflection, and frequency offset.
  • the second reference signals transmitted on different ports are mapped to the same time-frequency resource, which reduces the time-frequency resource occupation.
  • the transceiver is further configured to receive first signaling sent by the base station, where the first signaling indicates the first group of antenna ports and Corresponding relationship of the second group of antenna ports.
  • the transceiver is further configured to receive the second signaling sent by the base station, where the second The first reference signal is instructed to have the same reference signal type as the second reference signal or have a quasi-co-located QCL relationship.
  • the transceiver is further configured to receive, by the base station, third signaling, the third And indicating a reference signal type of the first reference signal and the second reference signal.
  • the reference signal type includes at least one of the following: a reference signal precoding, a channel response, and a downlink transmit beam.
  • the number of subcarriers to which the second reference signal is mapped in different scheduling bandwidth ranges is one or more constants ;
  • the number of subcarriers to which the second reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the second reference signal is used by at least two terminals to estimate one or a combination of the following information: phase noise, phase deflection, And frequency offset.
  • the number of antenna ports of the second group of antenna ports is smaller than the number of antenna ports of the second group of antenna ports.
  • the base station provided by the present application may include corresponding modules that perform the behavior of the base station in the above method, which may be software and/or hardware.
  • the terminal provided by the present application may include a corresponding module that performs the behavior of the terminal in the above method, and the module may be software and/or hardware.
  • a communication system comprising the base station and the terminal according to the third aspect and the fourth aspect, or the base station, the terminal, and the core network.
  • a computer storage medium comprising the program for performing the first to fourth aspects described above.
  • a reference signal sending method including:
  • the base station sends a reference signal to the terminal, where the reference signal includes a phase noise reference signal;
  • the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more constants;
  • the number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the phase noise reference signal includes M blocks, and each of the phase noise reference signals is mapped to N consecutive subcarriers in a frequency domain, in time domain. Every K orthogonal frequency division multiplexing OFDM symbols are mapped to at least one OFDM symbol, and two adjacent phase noise reference signals are separated from at least one subcarrier in the frequency domain, M is an integer greater than or equal to 2, and N is greater than An integer equal to 1, and K is an integer greater than or equal to zero.
  • the precoding granularity of the phase noise reference signal is at least one piece of the phase noise reference signal.
  • the method further includes: sending, by the base station, the precoding granularity to the terminal.
  • a reference signal receiving method including:
  • the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more constants;
  • the number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the phase noise reference signal includes an M block, and each of the phase noise reference signals is mapped to N consecutive subphase noise reference signals in a frequency domain. Including M blocks, each of the phase noise reference signals are mapped to N consecutive subcarriers in a frequency domain, and every K orthogonal frequency division multiplexing OFDM symbols are mapped to at least one OFDM symbol in the time domain, adjacent to each other.
  • the two phase noise reference signals are separated from at least one subcarrier in the frequency domain, M is an integer greater than or equal to 2, N is an integer greater than or equal to 1, and K is an integer greater than or equal to zero.
  • the precoding granularity of the phase noise reference signal is at least one piece of the phase noise reference signal.
  • the method further includes: receiving, by the terminal, the precoding granularity sent by the base station.
  • a base station including:
  • a processor configured to map a reference signal to a subcarrier, where the reference signal includes a phase noise reference signal; the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more Constant; or, the number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants
  • a transceiver for transmitting the reference signal.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the phase noise reference signal includes M blocks, and each of the phase noise reference signals is mapped to N consecutive subcarriers in a frequency domain, in time domain. Every K orthogonal frequency division multiplexing OFDM symbols are mapped to at least one OFDM symbol, and two adjacent phase noise reference signals are separated from at least one subcarrier in the frequency domain, M is an integer greater than or equal to 2, and N is greater than An integer equal to 1, and K is an integer greater than or equal to zero.
  • the precoding granularity of the phase noise reference signal is at least one piece of the phase noise reference signal.
  • the transceiver is further configured to send the precoding granularity to the terminal.
  • a tenth aspect provides a terminal, comprising:
  • a transceiver configured to receive a reference signal sent by the base station, where the reference signal includes a phase noise reference signal; the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more a constant; or, the number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants;
  • phase noise reference signal phase noise, phase deflection, and frequency offset.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the phase noise reference signal includes M blocks, and each of the phase noise reference signals is mapped to N consecutive subcarriers in a frequency domain, in a time domain. Every K orthogonal frequency division multiplexing OFDM symbols are mapped to at least one OFDM symbol, and two adjacent phase noise reference signals are separated from at least one subcarrier in the frequency domain, M is an integer greater than or equal to 2, and N is greater than An integer equal to 1, and K is an integer greater than or equal to zero.
  • the precoding granularity of the phase noise reference signal is at least one piece of the phase noise reference signal.
  • the transceiver is further configured to receive the precoding granularity sent by the base station.
  • the base station provided by the present application may include corresponding modules that perform the behavior of the base station in the above method, which may be software and/or hardware.
  • the terminal provided by the present application may include a corresponding module that performs the behavior of the terminal in the above method, and the module may be software and/or hardware.
  • a communication system comprising the base station and terminal according to the above ninth and tenth aspects, or a base station, a terminal, and a core network.
  • a computer storage medium comprising the program for performing the seventh to tenth aspects described above.
  • Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.
  • FIG. 1 is a schematic structural diagram of a possible system for implementing an embodiment of the present invention
  • FIG. 2 is a flowchart of a reference signal transmission method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of another reference signal transmission method according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another reference signal resource mapping according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 1 shows a schematic diagram of one possible system network of the present invention.
  • RAN radio access network
  • the RAN includes at least one base station (BS), and for the sake of clarity, only one base station and one UE are shown.
  • the RAN is connected to a core network (CN).
  • the CN may be coupled to one or more external networks, such as the Internet, a public switched telephone network (PSTN), and the like.
  • PSTN public switched telephone network
  • User equipment (English: User Equipment, UE for short) is a terminal device with communication function, which can also be called a terminal. It can include a handheld device with wireless communication function, an in-vehicle device, a wearable device, a computing device, or a connection to Other processing devices of the wireless modem, and the like.
  • User equipment can be called different names in different networks, such as: terminals, mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, laptops, cordless phones, Wireless local loop station, etc.
  • a base station also referred to as a base station device, is a device deployed in a radio access network to provide wireless communication functions.
  • the name of the base station may be different in different wireless access systems, for example, in a Universal Mobile Telecommunications System (UMTS) network, the base station is called a Node B (NodeB), in the LTE network.
  • the base station is called an evolved Node B (eNB or eNodeB), and may be called a Transmission Reception Point (TRP) in a future 5G system.
  • eNB evolved Node B
  • TRP Transmission Reception Point
  • the embodiment of the invention provides a reference signal transmission method. This method can be applied to the system shown in FIG. As shown in Figure 2, the method includes:
  • Step 201 The base station sends the first reference signal and the second reference signal.
  • the first reference signal is sent through the first group of antenna ports
  • the second reference signal is sent through the second group of antenna ports
  • the first group of antenna ports includes at least two antenna ports
  • the second group of antenna ports includes at least two antenna ports.
  • the time-frequency resources of the second reference signal map are the same; or
  • the time-frequency resources of the second reference signal map transmitted on at least two of the second set of antenna ports are the same.
  • the first reference signal is used for channel estimation and the second reference signal is used to estimate phase noise or phase deflection or frequency offset.
  • Step 202 The terminal receives the first reference signal and the second reference signal.
  • the terminal may perform channel estimation by using the first reference signal, estimate phase noise by using the second reference signal, or estimate by using the first reference signal and the second reference signal. Phase noise.
  • the time-frequency resource occupation of the reference signal is reduced.
  • the first reference signal may be referred to as a demodulation reference signal (DMRS); the second reference signal may be referred to as a phase tracking reference signal (PTRS) or a phase compensation reference signal.
  • DMRS demodulation reference signal
  • PTRS phase tracking reference signal
  • PCRS phase compensation reference signal
  • the second reference signal is mapped to the same time-frequency resource on all antenna ports of the second set of antenna ports.
  • the second group of antenna ports includes two subgroups or multiple subgroups, and the second reference signal on each subgroup antenna port is mapped to the same time-frequency resource, and the second sub-group of different sub-groups is mapped. To different time-frequency resources.
  • the method may further include: the base station sends the first signaling, where the first signaling indicates a correspondence between the first group of antenna ports and the second group of antenna ports.
  • the correspondence between the two sets of antenna ports may indicate two types of correspondence:
  • the first type of correspondence the corresponding antenna ports have the same phase noise; the second type of correspondence: the corresponding antenna ports have the same equivalent channel or the same precoding.
  • the same equivalent channel or the same precoding can be predefined, for example, the antenna port number is the same.
  • the base station divides the antenna ports of the DM-RS and the PT-RS into groups, and the DM-RS port and the PT-RS port in the same group belong to the antenna ports in the same group (including PT-RS and DM).
  • the -RS antenna port is considered to have the same phase noise.
  • the base station sends signaling indicating packet information to the UE.
  • the signaling may be radio resource control signaling or physical layer control signaling configured by the upper layer, and the UE determines the antenna port packet according to the signaling.
  • the foregoing method may further include: the base station sends the second signaling, where the second signaling indicates that the first reference signal and the second reference signal have the same reference signal type or have a quasi-co-located QCL relationship.
  • the QCL relationship refers to that the reference signal corresponding to the antenna port of the reference signal has the same parameter, or the QCL relationship refers to that the terminal can determine that the antenna port has an antenna port according to an antenna port.
  • the parameter of an antenna port of the QCL relationship, or the QCL relationship refers to the fact that the two antenna ports have the same parameter, or the QCL relationship refers to the difference between the parameters of the two antenna ports being less than a certain threshold.
  • the parameter may be delay spread, Doppler spread, Doppler shift, average delay, average gain, angle of arrival (AOA), average AOA, AOA extension, and exit angle (Angle of Departure) , AOD), average departure angle AOD, AOD extension, receive antenna spatial correlation parameter, transmit antenna spatial correlation parameter, transmit beam, receive beam, resource identifier, at least one of.
  • the beam includes at least one of the following, a precoding, a weight sequence number, and a beam sequence number.
  • the angle may be a decomposition value of a different dimension, or a combination of different dimensional decomposition values.
  • the antenna ports are antenna ports having different antenna port numbers, and/or antenna ports having the same antenna port number for transmitting or receiving information within different time and/or frequency and/or code domain resources, and/or having Antenna ports for transmitting or receiving information at different time and/or frequency and/or code domain resources for different antenna port numbers.
  • the resource identifier includes a channel state information reference signal (CSI-RS) resource identifier, or an SRS resource identifier, which is used to indicate a beam on the resource.
  • CSI-RS channel state information reference signal
  • the foregoing method may further include: the base station sends a third signaling, where the third signaling indicates a reference signal type of the first reference signal and the second reference signal.
  • the reference signal type may include at least one of the following: reference signal precoding, channel response, and downlink transmit beam.
  • the number of subcarriers to which the second reference signal is mapped in different scheduling bandwidth ranges is one or more constants
  • the number of subcarriers to which the second reference signal is mapped in different system bandwidth ranges is one or more constants.
  • the number of subcarriers may be a base station configuration or a predefined.
  • the base station may send signaling that the second reference signal is cell-specific, or UE group-specific, or UE-specific.
  • mapping relationship between the foregoing second reference signal and the subcarriers by way of example:
  • the second reference signal is distributed within the scheduling bandwidth, and the number of subcarriers occupied by the second reference signal is constant, for example, 4 subcarriers, regardless of how the scheduling bandwidth changes.
  • the second reference signal is distributed within the system bandwidth, and the number of subcarriers occupied by the second reference signal is constant regardless of the system bandwidth, for example, 6 subcarriers.
  • the second reference signal is distributed within the scheduling bandwidth, and the range of the scheduling bandwidth may be preset in several intervals, such as [1, 10], [15, 40], [50, 100], etc., according to scheduling.
  • the interval in which the bandwidth is located determines the number of subcarriers occupied.
  • the number of subcarriers corresponding to the above three intervals is 4, 6, and 8, respectively.
  • the scheduling bandwidth is 5M, the number of occupied subcarriers is 4; when it is 20M, the number of occupied subcarriers is 6; when it is 60M, the number of occupied subcarriers is 8.
  • the second reference signal is distributed within the system bandwidth, and the range of the system bandwidth may be preset in several intervals, such as [1, 10], [15, 40], [50, 100], etc., according to the system.
  • the interval in which the bandwidth is located determines the number of subcarriers occupied.
  • the number of subcarriers corresponding to the above three intervals is 4, 6, and 8, respectively.
  • the system bandwidth is 5M, the number of occupied subcarriers is 4; when it is 20M, the number of occupied subcarriers is 6; when it is 60M, the number of occupied subcarriers is 8.
  • the number of subcarriers occupied by the second reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • the second reference signal is used by at least two terminals to estimate one or a combination of the following information: phase noise, phase deflection, and frequency offset.
  • the number of antenna ports of the second group of antenna ports is smaller than the number of antenna ports of the second group of antenna ports.
  • the first set of antenna ports and the second set of antenna ports may have partial overlap.
  • the second reference signal may be used by multiple terminals to estimate one or a combination of the following information: phase noise, phase deflection, and frequency offset.
  • the sequence of the second reference signal sent on different antenna ports is different.
  • the sequence of the second reference signal on the second group of antenna ports is determined by an antenna port index or an identifier of the terminal.
  • the sequence is specified by the base station.
  • the base station before the base station sends the reference signal, the base station sends an indication signal, where the indication signal is used to indicate at least one of the following information:
  • the channel state information of the second type of reference signal port determined according to the foregoing second type correspondence and the DMRS port can be determined according to the channel state information of the DMRS port;
  • the channel state information of the DM-RS port is the same as the channel state information of the PTRS port determined according to the second type correspondence.
  • the base station determines, according to the number of antenna ports occupying the same time-frequency resource in the second group of antenna ports, the second reference signal transmit power on the antenna port.
  • the transmit power of the second reference signal on one antenna port is determined according to the number of antenna ports occupying the same time-frequency resource. If the number of antenna ports multiplexed on a certain time-frequency resource is M0, the second reference signal is The transmit power on a time-frequency resource particle is PDMRS, and the transmit power of the second reference signal on a resource particle of an antenna port is k ⁇ PDMRS/M0, where k is a predefined positive real number.
  • Another method embodiment of the present invention also provides another reference signal transmission method, which can be applied to the system shown in FIG.
  • the phase noise reference signal and the demodulation reference signal are taken as an example for description. As shown in FIG. 9, the method includes:
  • Step 901 The base station sends a reference signal to the terminal.
  • the reference signal includes a phase noise reference signal, and optionally, the phase noise reference signal is used to estimate phase noise or phase deflection or frequency offset;
  • the number of subcarriers to which the phase noise reference signal is mapped within different scheduling bandwidths is one or more constants;
  • the number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants.
  • Step 902 The terminal receives the reference signal.
  • the terminal can estimate the phase noise, phase deflection, or frequency offset using the phase noise reference signal.
  • the number of subcarriers occupied by the phase noise reference signal is constant or constant within a range, which reduces the time-frequency resource occupation of the reference signal.
  • phase noise reference signal For the mapping relationship between the phase noise reference signal and the subcarrier, reference may be made to the examples and descriptions of the foregoing embodiments in FIG. 5 to FIG. 8 , and details are not described herein again.
  • the phase noise reference signal includes M blocks, each phase noise reference signal is mapped to N consecutive subcarriers in the frequency domain, and OFDM symbols are multiplexed every K orthogonal frequency divisions in the time domain. Mapping to at least one OFDM symbol, the adjacent two phase noise reference signals are at least one subcarrier in the frequency domain, M is an integer greater than or equal to 2, N is an integer greater than or equal to 1, and K is an integer greater than or equal to zero.
  • Figure 10 is an example of mapping a phase noise reference signal to a time-frequency resource.
  • the precoding granularity of the phase noise reference signal is at least one phase noise reference signal.
  • the method further includes: the base station sending the precoding granularity to the terminal.
  • the precoding granularity can be preset.
  • the reference signal further includes a demodulation reference signal DMRS; the phase noise reference signal is located in the same OFDM symbol as the starting position of the DM RS in the time domain.
  • DMRS demodulation reference signal
  • the base station sends the reference signal, the base station sends the phase noise reference signal on the first group of antenna ports, and sends the DM RS on the second group of antenna ports.
  • the method further includes: the base station sends the first to the at least two UEs. Corresponding relationship between the group port and the second group port; wherein the first group of antenna ports includes at least one antenna port, and the second group of antenna ports includes at least one antenna port.
  • the method further includes: the base station sending downlink control information to the at least two UEs, where the downlink control information includes at least one of: time domain resource information of the phase noise reference signal and frequency domain resource information of the phase noise reference signal. Antenna port information used by the phase noise reference signal.
  • the method further includes: before the base station sends the downlink control information, the base station uses the scrambling code to scramble the downlink control information.
  • the method further includes: the base station sending the scrambling code to the at least two UEs.
  • the first scrambling code is one of a preset scrambling code set.
  • Embodiments of the present invention further provide an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments.
  • the methods, steps, technical details, technical effects, and the like of the foregoing method embodiments are also applicable to the device embodiments, and will not be described in detail later.
  • Fig. 11 is a block diagram showing the structure of a base station which can be applied to the system shown in Fig. 1.
  • the base station 20 includes one or more remote radio units (RRUs) 201 and one or more baseband units (BBUs) 202.
  • the RRU 201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 2011 and a radio frequency unit 2012.
  • the RRU 201 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting signaling indications and/or reference signals in the above embodiments to the terminal.
  • the BBU 202 part is mainly used for baseband processing, base station control, and the like.
  • the RRU 201 and the BBU 202 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, and spreading.
  • the BBU 202 may be composed of one or more boards, and multiple boards may jointly support a single access standard radio access network (such as a 5G network), or may separately support wireless access of different access systems. network.
  • the BBU 202 also includes a memory 2021 and a processor 2022.
  • the memory 2021 is used to store necessary instructions and data.
  • the processor 2022 is configured to control the base station to perform necessary actions.
  • Memory 2021 and processor 2022 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor.
  • the necessary circuits are also provided on each board.
  • the foregoing base station may be used to implement the method of the foregoing method embodiment, specifically:
  • a processor configured to generate a first reference signal and a second reference signal
  • a transceiver configured to send a first reference signal through the first group of antenna ports and send a second reference signal through the second group of antenna ports;
  • the first group of antenna ports includes at least two antenna ports, and the second group of antenna ports includes at least two antenna ports;
  • the time-frequency resources of the second reference signal map are the same; or
  • the time-frequency resources of the second reference signal map transmitted on at least two of the second set of antenna ports are the same.
  • the first reference signal is used for channel estimation and the second reference signal is used to estimate phase noise or phase deflection or frequency offset.
  • the transceiver is further configured to send the first signaling, where the first signaling indicates a correspondence between the first group of antenna ports and the second group of antenna ports.
  • the transceiver is further configured to send the second signaling, where the second signaling indicates that the first reference signal and the second reference signal have the same reference signal type or have a quasi-co-located QCL relationship.
  • the transceiver is further configured to send third signaling, where the third signaling indicates a reference signal type of the first reference signal and the second reference signal.
  • the foregoing base station may also be used to implement the method of the foregoing another method embodiment, specifically:
  • a processor configured to map the reference signal to the subcarrier, wherein the reference signal includes a phase noise reference signal; the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more constants; or The number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants
  • a transceiver for transmitting a reference signal for transmitting a reference signal.
  • the transceiver is further configured to send a precoding granularity to the terminal.
  • phase noise reference signal is used to estimate phase noise or phase deflection or frequency offset
  • FIG. 12 provides a schematic structural diagram of a terminal.
  • the terminal can be adapted for use in the system shown in FIG.
  • FIG. 12 shows only the main components of the terminal.
  • the terminal 10 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used for processing communication protocols and communication data, and controlling the entire terminal, executing software programs, and processing data of the software programs.
  • the memory is primarily used to store software programs and data, such as the codebooks described in the above embodiments.
  • the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the control circuit together with the antenna can also be called a transceiver, and is mainly used for transmitting and receiving RF signals in the form of electromagnetic waves.
  • the input/output device such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 12 shows only one memory and processor for ease of illustration. In an actual terminal, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, and the like.
  • the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal and execute the software.
  • the processor in FIG. 12 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal may include multiple baseband processors to accommodate different network standards.
  • the terminal may include multiple central processors to enhance its processing capabilities, and various components of the terminal may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and control circuit having the transceiving function can be regarded as the transceiving unit 101 of the terminal 10, and the processor having the processing function is regarded as the processing unit 102 of the terminal 10.
  • the terminal 10 includes a transceiver unit 101 and a processing unit 102.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like.
  • the device for implementing the receiving function in the transceiver unit 101 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 101 is regarded as a sending unit, that is, the transceiver unit 101 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit.
  • the foregoing terminal may be used to implement the method in the foregoing method embodiment, specifically:
  • a transceiver configured to receive a first reference signal and a second reference signal sent by the base station, where the first reference signal is sent by the base station by using a first group of antenna ports, and the second reference signal is the base station Transmitting, by the second group of antenna ports, the first group of antenna ports includes at least two antenna ports, and the second group of antenna ports includes at least two antenna ports; the time-frequency resources of the second reference signal mapping are the same; Or the time-frequency resources of the second reference signal mapping sent on at least two of the antenna ports of the second group of antenna ports are the same;
  • the processor may be configured to perform channel estimation according to the first reference signal, and estimate one or a combination of the following information according to the second reference signal: phase noise, phase deflection, and frequency offset.
  • the transceiver is further configured to receive the first signaling sent by the base station, where the first signaling indicates a correspondence between the first group of antenna ports and the second group of antenna ports.
  • the transceiver is further configured to receive the second signaling sent by the base station, where the second signaling indicates that the first reference signal and the second reference signal have the same reference signal type or have a quasi-co-located QCL relationship.
  • the transceiver is further configured to receive third signaling sent by the base station, where the third signaling indicates a reference signal type of the first reference signal and the second reference signal.
  • the foregoing terminal may also be used to implement the method in the foregoing another method embodiment, specifically:
  • a transceiver configured to receive a reference signal sent by the base station, where the reference signal includes a phase noise reference signal; and the number of subcarriers to which the phase noise reference signal is mapped in different scheduling bandwidth ranges is one or more constants; or The number of subcarriers to which the phase noise reference signal is mapped in different system bandwidth ranges is one or more constants;
  • the processor may be configured to estimate one or a combination of the following information by using the phase noise reference signal: phase noise, phase deflection, and frequency offset.
  • the transceiver is further configured to receive a precoding granularity sent by the base station.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • a general purpose processor may be a microprocessor.
  • the general purpose processor may be any conventional processor, controller, microcontroller, or state machine.
  • the processor may also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration. achieve.
  • the steps of the method or algorithm described in the embodiments of the present invention may be directly embedded in hardware, a software unit executed by a processor, or a combination of the two.
  • the software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art.
  • the storage medium can be coupled to the processor such that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium can also be integrated into the processor.
  • the processor and the storage medium may be disposed in an ASIC, and the ASIC may be disposed in the UE. Alternatively, the processor and the storage medium may also be located in different components in the UE.
  • the above-described functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, these functions may be stored on a computer readable medium or transmitted as one or more instructions or code to a computer readable medium.
  • Computer readable media includes computer storage media and communication media that facilitates the transfer of computer programs from one place to another.
  • the storage medium can be any available media that any general purpose or special computer can access.
  • Such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other device or data structure that can be used for carrying or storing Other media that can be read by a general purpose or special computer, or a general purpose or special processor.
  • any connection can be appropriately defined as a computer readable medium, for example, if the software is from a website site, server or other remote source through a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) Or wirelessly transmitted in, for example, infrared, wireless, and microwave, is also included in the defined computer readable medium.
  • DSL digital subscriber line
  • the disks and discs include compact disks, laser disks, optical disks, DVDs, floppy disks, and Blu-ray disks. Disks typically replicate data magnetically, while disks typically optically replicate data with a laser. Combinations of the above may also be included in a computer readable medium.

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Abstract

本申请公开了一种参考信号传输方法及装置。基站发送第一参考信号和第二参考信号，其中，所述第一参考信号通过第一组天线端口发送，所述第二参考信号通过第二组天线端口发送，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；所述第二参考信号映射的时频资源相同；或者在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同。通过上述方案，在不同端口传输的第二参考信号映射到相同的时频资源，降低了时频资源占用量。

Description

一种参考信号传输方法及装置
本申请要求于2017年01月06日提交中国专利局、申请号为201710010855.6、申请名称为“一种参考信号传输方法及装置”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。
技术领域
本申请涉及移动通信技术领域，特别涉及一种参考信号传输方法及装置。
背景技术
随着移动通信技术的发展，通信速率和容量需求日益增长。第三代合作伙伴计划3GPP(The 3rd Generation Partnership Project)在下一代演进无线***(New Radio，NR)中，将高频频段纳入***设计的考虑范围内。在无线***中，例如基站或终端中的本地振荡器是非理想的，本地振荡器的随机抖动导致输出的载波信号带有相位噪声(phase noise，PN)。随着载波频率的提高，相位噪声功率会增大，因此相位噪声的影响不可忽略，在接收端需要利用参考信号估计出相位噪声。
例如，可以利用相位补偿参考信号(Phase noise Compensation Reference Signal，PCRS)来估计相位噪声。相位补偿参考信号需要映射到时频资源上进行传输。现有技术中，相位补偿参考信号占用的时频资源较多。
发明内容
本申请提供一种参考信号传输方法及装置，用于减少参考信号的时频资源占用量。
第一方面，提供了一种参考信号发送方法，包括：
基站发送第一参考信号和第二参考信号，其中，所述第一参考信号通过第一组天线端口发送，所述第二参考信号通过第二组天线端口发送，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；
所述第二参考信号映射的时频资源相同；或者
在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同。
通过上述方案，在不同端口传输的第二参考信号映射到相同的时频资源，降低了时频资源占用量。
结合第一方面，在第一种可能的实现方式中，所述方法还包括：
所述基站发送第一信令，所述第一信令指示所述第一组天线端口与所述第二组天线端口的对应关系。
结合第一方面或第一方面第一种可能的实现方式，在第二种可能的实现方式中，所述方法还包括：
所述基站发送第二信令，所述第二信令指示所述第一参考信号与所述第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
结合第一方面或第一方面第一种可能的实现方式，在第三种可能的实现方式中，所述方法还包括：
所述基站发送第三信令，所述第三信令指示所述第一参考信号和所述第二参考信号的参考信号类型。
结合第一方面第二种或第三种可能的实现方式，在第四种可能的实现方式中，所述参考信号类型包括以下至少之一：参考信号预编码、信道响应、下行发送波束。
结合第一方面或上述各种可能的实现方式，在第五种可能的实现方式中，所述第二参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述第二参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第一方面或上述各种可能的实现方式，在第六种可能的实现方式中，所述第二参考信号用于至少两个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
结合第一方面或上述各种可能的实现方式，在第七种可能的实现方式中所述第一参考信号用于信道估计，所述第二参考信号用于估计相位噪声或相位偏转或频率偏移。
第二方面，提供了一种参考信号接收方法，包括：
终端接收基站发送的第一参考信号和第二参考信号，其中，所述第一参考信号是所述基站通过第一组天线端口发送的，所述第二参考信号是所述基站通过第二组天线端口发送的，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；所述第二参考信号映射的时频资源相同；或者，在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同。
通过上述方案，在不同端口传输的第二参考信号映射到相同的时频资源，降低了时频资源占用量。
结合第二方面，在第一种可能的实现方式中，所述方法还包括：
所述终端接收所述基站发送的第一信令，所述第一信令指示所述第一组天线端口与所述第二组天线端口的对应关系。
结合第二方面或第二方面第一种可能的实现方式，在第二种可能的实现方式中，所述方法还包括：
所述终端接收所述基站发送的第二信令，所述第二信令指示所述第一参考信号与所述第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
结合第二方面或第二方面第一种可能的实现方式，在第三种可能的实现方式中，所述方法还包括：
所述终端接收所述基站发送的第三信令，所述第三信令指示所述第一参考信号和所述第二参考信号的参考信号类型。
结合第二方面第二种或第三种可能的实现方式，在第四种可能的实现方式中，所 述参考信号类型包括以下至少之一：参考信号预编码、信道响应、下行发送波束。
结合第二方面或上述各种可能的实现方式，在第五种可能的实现方式中，所述第二参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述第二参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第二方面或上述各种可能的实现方式，在第六种可能的实现方式中，所述第二参考信号用于至少两个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
结合第二方面或上述各种可能的实现方式，在第七种可能的实现方式中，所述方法还包括：所述终端根据所述第一参考信号进行信道估计，根据所述第二参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
第三方面，提供了一种基站，包括：
处理器，用于生成第一参考信号和第二参考信号；
收发器，用于通过第一组天线端口发送所述第一参考信号和通过第二组天线端口发送所述第二参考信号；
其中，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；
所述第二参考信号映射的时频资源相同；或者
在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同。
结合第三方面，在第一种可能的实现方式中，所述收发器，还用于发送第一信令，所述第一信令指示所述第一组天线端口与所述第二组天线端口的对应关系。
结合第三方面或第三方面第一种可能的实现方式，在第二种可能的实现方式中，所述收发器，还用于发送第二信令，所述第二信令指示所述第一参考信号与所述第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
结合第三方面或第三方面第一种可能的实现方式，在第三种可能的实现方式中，所述收发器，还用于发送第三信令，所述第三信令指示所述第一参考信号和所述第二参考信号的参考信号类型。
结合第三方面第二种或第三种可能的实现方式，在第四种可能的实现方式中，所述参考信号类型包括以下至少之一：参考信号预编码、信道响应、下行发送波束。
结合第三方面或上述各种可能的实现方式，在第五种可能的实现方式中，所述第二参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述第二参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第三方面或上述各种可能的实现方式，在第六种可能的实现方式中，所述第 二参考信号用于至少两个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
结合第一方面或上述各种可能的实现方式，在第七种可能的实现方式中，所述第一参考信号用于信道估计，所述第二参考信号用于估计相位噪声或相位偏转或频率偏移。
第四方面，提供了一种终端，包括：
收发器，用于接收基站发送的第一参考信号和第二参考信号，其中，所述第一参考信号是所述基站通过第一组天线端口发送的，所述第二参考信号是所述基站通过第二组天线端口发送的，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；所述第二参考信号映射的时频资源相同；或者，在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同；
处理器，用于根据所述第一参考信号进行信道估计，根据所述第二参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
通过上述方案，在不同端口传输的第二参考信号映射到相同的时频资源，降低了时频资源占用量。
结合第四方面，在第一种可能的实现方式中，所述收发器，还用于接收所述基站发送的第一信令，所述第一信令指示所述第一组天线端口与所述第二组天线端口的对应关系。
结合第四方面或第四方面第一种可能的实现方式，在第二种可能的实现方式中，所述收发器，还用于接收所述基站发送的第二信令，所述第二信令指示所述第一参考信号与所述第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
结合第四面或第四方面第一种可能的实现方式，在第三种可能的实现方式中，所述收发器，还用于收所述基站发送的第三信令，所述第三信令指示所述第一参考信号和所述第二参考信号的参考信号类型。
结合第四方面第二种或第三种可能的实现方式，在第四种可能的实现方式中，所述参考信号类型包括以下至少之一：参考信号预编码、信道响应、下行发送波束。
结合第四方面或上述各种可能的实现方式，在第五种可能的实现方式中，所述第二参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述第二参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第四方面或上述各种可能的实现方式，在第六种可能的实现方式中，所述第二参考信号用于至少两个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
结合第四方面或上述各种可能的实现方式，在第七种可能的实现方式中所述第二组天线端口的天线端口数量小于所述第二组天线端口的天线端口数量。
在一个可能的设计中，本申请提供的基站可以包括执行上述方法中基站行为的相 应的模块，所述模块可以是软件和/或硬件。
在一个可能的设计中，本申请提供的终端可以包括执行上述方法中终端行为的相应的模块，所述模块可以是软件和/或硬件。
第五方面，提供了一种通信***，该***包括上述第三方面和第四方面所述的基站和终端，或者基站，终端以及核心网络。
第六方面，提供了一种计算机存储介质，其包含用于执行上述第一至第四所方面涉及的程序。
第七方面，提供了一种参考信号发送方法，包括：
基站向终端发送参考信号，所述参考信号包括相位噪声参考信号；
所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第七方面，在第一种可能的实现方式中，所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
结合第七方面第一种可能的实现方式，在第二种可能的实现方式中，所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
结合第七方面第二种可能的实现方式，在第三种可能的实现方式中，所述方法还包括，所述基站向所述终端发送所述预编码粒度。
第八方面，提供了一种参考信号接收方法，包括：
终端接收基站发送的参考信号，所述参考信号包括相位噪声参考信号；
所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第八方面，在第一种可能的实现方式中，所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
结合第八方面第一种可能的实现方式，在第二种可能的实现方式中，所述相位噪 声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
结合第八方面第二种可能的实现方式，在第三种可能的实现方式中，所述方法还包括，所述终端接收所述基站发送的所述预编码粒度。
第九方面，提供了一种基站，包括：
处理器，用于将参考信号映射到子载波，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数
收发器，用于发送所述参考信号。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第九方面，在第一种可能的实现方式中，所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
结合第九方面第一种可能的实现方式，在第二种可能的实现方式中，所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
结合第九方面第二种可能的实现方式，在第三种可能的实现方式中，所述收发器，还用于向所述终端发送所述预编码粒度。
第十方面，提供了一种终端，其特征在于，包括：
收发器，用于接收基站发送的参考信号，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数；
处理器，用于利用所述相位噪声参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
结合第十方面，在第一种可能的实现方式中，所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
结合第十方面第一种可能的实现方式，在第二种可能的实现方式中，所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
结合第十方面第二种可能的实现方式，在第三种可能的实现方式中，所述收发器，还用于接收所述基站发送的所述预编码粒度。
在一个可能的设计中，本申请提供的基站可以包括执行上述方法中基站行为的相 应的模块，所述模块可以是软件和/或硬件。
在一个可能的设计中，本申请提供的终端可以包括执行上述方法中终端行为的相应的模块，所述模块可以是软件和/或硬件。
第十一方面，提供了一种通信***，该***包括上述第九方面和第十方面所述的基站和终端，或者基站，终端以及核心网络。
第十二方面，提供了一种计算机存储介质，其包含用于执行上述第七至第十方面所涉及的程序。
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，使得计算机执行上述各方面所述的方法。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍。
图1为实现本发明实施例的一种可能的***结构示意图；
图2为本发明实施例提供的一种参考信号传输方法流程图；
图3为本发明实施例提供的另一种参考信号资源映射示意图；
图4为本发明实施例提供的另一种参考信号资源映射示意图；
图5为本发明实施例提供的另一种参考信号资源映射示意图；
图6为本发明实施例提供的另一种参考信号资源映射示意图；
图7为本发明实施例提供的另一种参考信号资源映射示意图；
图8为本发明实施例提供的另一种参考信号资源映射示意图；
图9为本发明实施例提供的另一种参考信号传输方法流程图；
图10为本发明实施例提供的另一种参考信号资源映射示意图；
图11为本发明实施例提供的一种基站的结构示意图；
图12为本发明实施例提供的一种终端的结构示意图。
具体实施方式
下面结合附图，对本发明提供的实施例做详细说明。本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
图1示出了本发明的一种可能的***网络示意图。如图1所示，至少一个终端10与无线接入网(Radio access network,简称RAN)进行通信。所述RAN包括至少一个基站20(base station,简称BS)，为清楚起见，图中只示出一个基站和一个UE。所述RAN与核心网络(core network,简称CN)相连。可选的，所述CN可以耦合到一个或者更多的外部网络(External Network)，例如英特网，公共交换电话网(public switched telephone network，简称PSTN)等。
为便于理解下面对本申请中涉及到的一些名词做些说明。
本申请中，名词“网络”和“***”经常交替使用，但本领域的技术人员可以理 解其含义。用户设备(英文：User Equipment，简称：UE)是一种具有通信功能的终端设备，也可以称为终端，可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备等。在不同的网络中用户设备可以叫做不同的名称，例如：终端，移动台，用户单元，站台，蜂窝电话，个人数字助理，无线调制解调器，无线通信设备，手持设备，膝上型电脑，无绳电话，无线本地环路台等。为描述方便，本申请中简称为用户设备UE或终端。基站(base station，简称：BS)，也可称为基站设备，是一种部署在无线接入网用以提供无线通信功能的设备。在不同的无线接入***中基站的名称可能有所不同，例如在而在通用移动通讯***(Universal Mobile Telecommunications System，简称：UMTS)网络中基站称为节点B(NodeB),在LTE网络中的基站称为演进的节点B(evolved NodeB，简称：eNB或者eNodeB)，在未来5G***中可以称为收发节点(Transmission Reception Point，TRP)。
本发明实施例提供了一种参考信号传输方法。该方法可以应用于图1所示的***。如图2所示，该方法包括：
步骤201、基站发送第一参考信号和第二参考信号。
其中，第一参考信号通过第一组天线端口发送，第二参考信号通过第二组天线端口发送，第一组天线端口包括至少两个天线端口，第二组天线端口包括至少两个天线端口；
第二参考信号映射的时频资源相同；或者
在第二组天线端口中的至少两个天线端口上发送的第二参考信号映射的时频资源相同。
可选的，第一参考信号用于信道估计，第二参考信号用于估计相位噪声或相位偏转或频率偏移。
步骤202、终端接收第一参考信号和第二参考信号。
可选的，终端在接收到第一参考信号和第二参考信号后，可以利用第一参考信号进行信道估计，利用第二参考信号估计相位噪声，或者利用第一参考信号和第二参考信号估计相位噪声。
本发明实施例中，通过将多个端口的参考信号映射到相同的时频资源，降低了参考信号时频资源占用量。
上述方法中可选的，第一参考信号可以称为解调参考信号(demodulation reference signal,DMRS)；第二参考信号可以称为相位跟踪参考信号(phase tracking reference signal,PTRS)或者相位补偿参考信号(phase noise comepensation reference signal,PCRS)。
下面对上述第二组天线端口与时频资源的对应关系做进一步举例说明：
例如，如图3所示，第二参考信号在第二组天线端口的所有天线端口上映射到相同的时频资源。
或者，如图4所示，第二组天线端口包括两个子组或多个子组，每子组天线端口上的第二参考信号映射到相同的时频资源，不同子组的第二参考信号映射到不同的时频资源。
上述方法中可选的，还可以包括：基站发送第一信令，第一信令指示第一组天线端口与第二组天线端口的对应关系。
可选的，两组天线端口的对应关系可以指示两类对应关系：
第一类对应关系：对应的天线端口有相同的相位噪声；第二类对应关系：对应的天线端口有相同的等效信道或相同的预编码。其中，相同的等效信道或相同的预编码可以预定义，比如天线端口号相同。
可选的，基站将DM-RS和PT-RS的天线端口分成若干组，同一组内既有DM-RS端口又有PT-RS端口，属于同一组内的天线端口(包括PT-RS和DM-RS天线端口)认为具有相同的相位噪声，基站向UE发送信令指示分组信息，信令可以是高层配置的无线资源控制信令或物理层控制信令，UE根据信令确定天线端口分组。
可选的，上述方法还可以包括：基站发送第二信令，第二信令指示第一参考信号与第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
本发明实施例中可选的，QCL关系是指参考信号的天线端口对应的参考信号中具有相同的参数，或者，QCL关系指的是终端可以根据一个天线端口的参数确定与所述天线端口具有QCL关系的一个天线端口的参数，或者，QCL关系指的是两个天线端口具有相同的参数，或者，QCL关系指的是两个天线端口具的参数差小于某阈值。其中，该参数可以为时延扩展，多普勒扩展，多普勒频移，平均时延，平均增益，到达角(Angle of arrival，AOA)，平均AOA、AOA扩展，离开角(Angle of Departure，AOD)，平均离开角AOD、AOD扩展，接收天线空间相关性参数，发送天线空间相关性参数，发送波束，接收波束，资源标识中的至少一个。所述波束包括以下至少一个，预编码，权值序号，波束序号。所述角度可以为不同维度的分解值，或不同维度分解值的组合。所述的天线端口为具有不同天线端口编号的天线端口，和/或具有相同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口，和/或具有不同天线端口号在不同时间和/或频率和/或码域资源内进行信息发送或接收的天线端口。所述资源标识包括信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS)资源标识，或SRS资源标识，用于指示资源上的波束。
可选的，上述方法还可以包括：基站发送第三信令，第三信令指示第一参考信号和第二参考信号的参考信号类型。
参考信号类型可以包括以下至少之一：参考信号预编码、信道响应、下行发送波束。
上述方法中可选的，第二参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
第二参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
可选的，子载波个数可以是基站配置或者预定义。
可选的，基站可以发送信令指示第二参考信号是小区专用、或UE组专用、或UE专用。
下面对上述第二参考信号与子载波的映射关系通过举例做进一步说明：
例如，如图5所示，第二参考信号分布在调度带宽内，不论调度带宽如何变化，第二参考信号占用的子载波个数是恒定的，例如4个子载波。
例如，如图6所示，第二参考信号分布在***带宽内，不论***带宽如何变化，第二参考信号占用的子载波个数是恒定的，例如6个子载波。
例如，如图7所示，第二参考信号分布在调度带宽内，调度带宽的范围可以预先设定几个区间，例如[1,10]，[15,40]，[50,100]等，根据调度带宽所处的区间确定占用的子载波个数，例如上述三个区间对应的子载波个数分别是4，6，8。当调度带宽为5M时，则占用子载波个数是4；为20M时，占用子载波数是6；为60M时，占用子载波数是8。
例如，如图8所示，第二参考信号分布在***带宽内，***带宽的范围可以预先设定几个区间，例如[1,10]，[15,40]，[50,100]等，根据***带宽所处的区间确定占用的子载波个数，例如上述三个区间对应的子载波个数分别是4，6，8。当***带宽为5M时，则占用子载波个数是4；为20M时，占用子载波数是6；为60M时，占用子载波数是8。
上述方案中，第二参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
可选的，第二参考信号用于至少两个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
可选的，第二组天线端口的天线端口数量小于第二组天线端口的天线端口数量。
可选的，第一组天线端口和第二组天线端口可以有部分重叠。
可选的，当第二组天线端口只包含一个天线端口时，第二参考信号可以用于多个终端估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
可选的，做为一种特殊场景，当第二参考信号在不同天线端口上映射到相同的时频资源时，第二参考信号在不同天线端口上发送的序列不同。
可选的，第二参考信号在第二组天线端口上的序列由天线端口索引或终端的标识确定。或者，序列由基站指定。
可选的，基站在发送参考信号之前，基站发送指示信号，指示信号用于指示以下信息至少之一：
用户是否假设DM-RS端口采用的预编码权值与根据前述第二类对应关系确定的PTRS端口采用的预编码权值相同；或
用户是否假设可以根据DMRS端口的信道状态信息，确定根据前述第二类对应关系与DMRS端口确定的第二类参考信号端口的信道状态信息；或
用户是否假设DM-RS端口的信道状态信息与根据第二类对应关系确定的PTRS端口的信道状态信息相同。
可选的，基站在发送参考信号之前，根据第二组天线端口中占用相同时频资源的天线端口个数，确定天线端口上的第二参考信号发射功率。
具体的，第二参考信号在一个天线端口上的发射功率根据占用相同时频资源的天线端口个数决定，若在某一个时频资源上复用的天线端口数目为M0,第二参考信号在一个时频资源粒子上的发射功率为PDMRS，则第二参考信号在一个天线端口一个资源粒子上的发射功率为k·PDMRS/M0,其中k是一个预定义的正实数。
本发明另一方法实施例还给出了另一种参考信号传输方法，该方法可以应用于图 1所示的***。下面以相位噪声参考信号和解调参考信号为例进行说明，如图9所示，该方法包括：
步骤901、基站向终端发送参考信号。
参考信号包括相位噪声参考信号，可选的，相位噪声参考信号用于估计相位噪声或相位偏转或频率偏移；
相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者
相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数。
步骤902、终端接收参考信号。
终端可以利用相位噪声参考信号估计相位噪声、相位偏转或频率偏移。
上述方案中，相位噪声参考信号占用的子载波个数恒定或在一个范围内恒定，降低了参考信号的时频资源占用量。
关于相位噪声参考信号与子载波的映射关系，可以参考前面实施例中图5-图8对应的举例和说明，此处不再赘述。
上述实施例可选的，相位噪声参考信号包括M块，每块相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。图10为相位噪声参考信号映射到时频资源的一种示例。
可选的，相位噪声参考信号的预编码粒度为至少一块相位噪声参考信号。
可选的，方法还包括，基站向终端发送预编码粒度。
可选的，预编码粒度可以预设。
可选的，参考信号还包括解调参考信号DMRS；相位噪声参考信号与DM RS在时域上的起始位置位于同一OFDM符号。
可选的，基站发送参考信号包括，基站在第一组天线端口上发送相位噪声参考信号，以及在第二组天线端口上发送DM RS；上述方法还包括，基站向至少两个UE发送第一组端口与第二组端口的对应关系；其中，第一组天线端口包括至少一个天线端口，第二组天线端口包括至少一个天线端口。
可选的，上述方法还包括，基站向至少两个UE发送下行控制信息，下行控制信息包括以下信息中的至少一个：相位噪声参考信号的时域资源信息、相位噪声参考信号的频域资源信息、相位噪声参考信号使用的天线端口信息。
可选的，上述方法还包括，在基站发送下行控制信息之前，基站使用扰码对下行控制信息加扰。
可选的，上述方法还包括，基站将扰码发送给至少两个UE。
可选的，第一扰码为预设扰码集合中的一个。
需要说明的是，上述不同实施例的方案的部分或全部步骤或技术细节可以结合使用。
本发明实施例进一步给出实现上述方法实施例中各步骤及方法的装置实施例。前 述方法实施例的方法、步骤、技术细节、技术效果等同样适用于装置实施例，后续不再详细说明。
图11示出一种基站的结构示意图，该基站可应用于如图1所示的***。基站20包括一个或多个远端射频单元(remote radio unit,RRU)201和一个或多个基带单元(baseband unit，BBU)202。RRU201可以称为收发单元、收发机、收发电路、或者收发器等等，其可以包括至少一个天线2011和射频单元2012。RRU201分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端发送上述实施例中的信令指示和/或参考信号。BBU202部分主要用于进行基带处理，对基站进行控制等。RRU201与BBU202可以是可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
BBU202为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。在一个示例中，BBU202可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如5G网络)，也可以分别支持不同接入制式的无线接入网。BBU202还包括存储器2021和处理器2022。存储器2021用以存储必要的指令和数据。处理器2022用于控制基站进行必要的动作。存储器2021和处理器2022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板公用相同的存储器和处理器。此外每个单板上还设置有必要的电路。
上述基站可以用于实现前述方法实施例的方法，具体的：
处理器，用于生成第一参考信号和第二参考信号；
收发器，用于通过第一组天线端口发送第一参考信号和通过第二组天线端口发送第二参考信号；
其中，第一组天线端口包括至少两个天线端口，第二组天线端口包括至少两个天线端口；
第二参考信号映射的时频资源相同；或者
在第二组天线端口中的至少两个天线端口上发送的第二参考信号映射的时频资源相同。
可选的，第一参考信号用于信道估计，第二参考信号用于估计相位噪声或相位偏转或频率偏移。
可选的，收发器，还用于发送第一信令，第一信令指示第一组天线端口与第二组天线端口的对应关系。
可选的，收发器，还用于发送第二信令，第二信令指示第一参考信号与第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
可选的，收发器，还用于发送第三信令，第三信令指示第一参考信号和第二参考信号的参考信号类型。
上述基站也可以用于实现前述另一方法实施例的方法，具体的：
处理器，用于将参考信号映射到子载波，其中，参考信号包括相位噪声参考信号；相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者，相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多 个常数
收发器，用于发送参考信号。
可选的，收发器，还用于向终端发送预编码粒度。
可选的，相位噪声参考信号用于估计相位噪声或相位偏转或频率偏移
图12提供了一种终端的结构示意图。该终端可适用于图1所示出的***中。为了便于说明，图12仅示出了终端的主要部件。如图12所示，终端10包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。具输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图12仅示出了一个存储器和处理器。在实际的终端中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端进行控制，执行软件程序，处理软件程序的数据。图12中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端可以包括多个基带处理器以适应不同的网络制式，终端可以包括多个中央处理器以增强其处理能力，终端的各个部件可以通过各种总线连接。基带处理器也可以表述为基带处理电路或者基带处理芯片。中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在发明实施例中，可以将具有收发功能的天线和控制电路视为终端10的收发单元101，将具有处理功能的处理器视为终端10的处理单元102。如图12所示，终端10包括收发单元101和处理单元102。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元101中用于实现接收功能的器件视为接收单元，将收发单元101中用于实现发送功能的器件视为发送单元，即收发单元101包括接收单元和发送单元示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
上述终端可以用于实现前述方法实施例中的方法，具体的：
收发器，用于接收基站发送的第一参考信号和第二参考信号，其中，所述第一参考信号是所述基站通过第一组天线端口发送的，所述第二参考信号是所述基站通过第二组天线端口发送的，所述第一组天线端口包括至少两个天线端口，所述第二组天线端口包括至少两个天线端口；所述第二参考信号映射的时频资源相同；或者，在所述第二组天线端口中的至少两个所述天线端口上发送的所述第二参考信号映射的时频资源相同；
可选的，处理器，可以用于根据所述第一参考信号进行信道估计，根据所述第二参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
可选的，收发器，还用于接收基站发送的第一信令，第一信令指示第一组天线端口与第二组天线端口的对应关系。
可选的，收发器，还用于接收基站发送的第二信令，第二信令指示第一参考信号与第二参考信号具有相同的参考信号类型或具有准共址QCL关系。
可选的，收发器，还用于收基站发送的第三信令，第三信令指示第一参考信号和第二参考信号的参考信号类型。
上述终端也可以用于实现前述另一方法实施例中的方法，具体的：
收发器，用于接收基站发送的参考信号，其中，参考信号包括相位噪声参考信号；相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个或多个常数；或者，相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个或多个常数；
可选的，处理器，可以用于利用相位噪声参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
可选的，收发器，还用于接收基站发送的预编码粒度。
在上述各实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
本领域技术任何还可以了解到本发明实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个***的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种 实现不应被理解为超出本发明实施例保护的范围。
本发明实施例中所描述的各种说明性的逻辑单元和电路可以通过通用处理器，数字信号处理器，专用集成电路(ASIC)，现场可编程门阵列(FPGA)或其它可编程逻辑装置，离散门或晶体管逻辑，离散硬件部件，或上述任何组合的设计来实现或操作所描述的功能。通用处理器可以为微处理器，可选地，该通用处理器也可以为任何传统的处理器、控制器、微控制器或状态机。处理器也可以通过计算装置的组合来实现，例如数字信号处理器和微处理器，多个微处理器，一个或多个微处理器联合一个数字信号处理器核，或任何其它类似的配置来实现。
本发明实施例中所描述的方法或算法的步骤可以直接嵌入硬件、处理器执行的软件单元、或者这两者的结合。软件单元可以存储于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、可移动磁盘、CD-ROM或本领域中其它任意形式的存储媒介中。示例性地，存储媒介可以与处理器连接，以使得处理器可以从存储媒介中读取信息，并可以向存储媒介存写信息。可选地，存储媒介还可以集成到处理器中。处理器和存储媒介可以设置于ASIC中，ASIC可以设置于UE中。可选地，处理器和存储媒介也可以设置于UE中的不同的部件中。
在一个或多个示例性的设计中，本发明实施例所描述的上述功能可以在硬件、软件、固件或这三者的任意组合来实现。如果在软件中实现，这些功能可以存储与电脑可读的媒介上，或以一个或多个指令或代码形式传输于电脑可读的媒介上。电脑可读媒介包括电脑存储媒介和便于使得让电脑程序从一个地方转移到其它地方的通信媒介。存储媒介可以是任何通用或特殊电脑可以接入访问的可用媒体。例如，这样的电脑可读媒体可以包括但不限于RAM、ROM、EEPROM、CD-ROM或其它光盘存储、磁盘存储或其它磁性存储装置，或其它任何可以用于承载或存储以指令或数据结构和其它可被通用或特殊电脑、或通用或特殊处理器读取形式的程序代码的媒介。此外，任何连接都可以被适当地定义为电脑可读媒介，例如，如果软件是从一个网站站点、服务器或其它远程资源通过一个同轴电缆、光纤电脑、双绞线、数字用户线(DSL)或以例如红外、无线和微波等无线方式传输的也被包含在所定义的电脑可读媒介中。所述的碟片(disk)和磁盘(disc)包括压缩磁盘、镭射盘、光盘、DVD、软盘和蓝光光盘，磁盘通常以磁性复制数据，而碟片通常以激光进行光学复制数据。上述的组合也可以包含在电脑可读媒介中。
本发明说明书的上述描述可以使得本领域技术任何可以利用或实现本发明的内容，任何基于所公开内容的修改都应该被认为是本领域显而易见的，本发明所描述的基本原则可以应用到其它变形中而不偏离本发明的发明本质和范围。因此，本发明所公开的内容不仅仅局限于所描述的实施例和设计，还可以扩展到与本发明原则和所公开的新特征一致的最大范围。

Claims (26)

  1. 一种参考信号发送方法，其特征在于，所述方法包括：
    向终端发送参考信号，所述参考信号包括相位噪声参考信号；
    所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者
    所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数。
  2. 根据权利要求1所述的方法，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  3. 根据权利要求2所述的方法，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    向所述终端发送所述预编码粒度。
  5. 一种参考信号接收方法，其特征在于，所述方法包括：
    接收来自于基站的参考信号，所述参考信号包括相位噪声参考信号；
    所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者
    所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数。
  6. 根据权利要求5所述的方法，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  7. 根据权利要求6所述的方法，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    从所述基站接收所述预编码粒度。
  9. 一种基站，其特征在于，包括：
    处理单元，用于将参考信号映射到子载波，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数；
    发送单元，用于发送所述参考信号。
  10. 根据权利要求9所述的基站，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  11. 根据权利要求10所述的基站，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  12. 根据权利要求11所述的基站，其特征在于：
    所述发送单元，还用于发送所述预编码粒度。
  13. 一种终端，其特征在于，包括：
    接收单元，用于接收来自于基站的参考信号，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数；
    处理单元，用于利用所述相位噪声参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
  14. 根据权利要求13所述的终端，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  15. 根据权利要求14所述的终端，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  16. 根据权利要求15所述的终端，其特征在于：
    所述接收单元，还用于从所述基站接收所述预编码粒度。
  17. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器耦合，所述至少一个处理器，用于将参考信号映射到子载波，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数；
    所述处理器，还用于输出所述参考信号。
  18. 根据权利要求17所述的通信装置，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  19. 根据权利要求18所述的通信装置，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  20. 根据权利要求19所述的通信装置，其特征在于：
    所述处理器，还用于输出所述预编码粒度。
  21. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器与存储器耦合，所述至少一个处理器，用于接收参考信号，其中，所述参考信号包括相位噪声参考信号；所述相位噪声参考信号在不同的调度带宽范围内所映射到的子载波个数是一个常数或多个常数；或者，所述相位噪声参考信号在不同的***带宽范围内所映射到的子载波个数是一个常数或多个常数；
    所述处理器，还用于利用所述相位噪声参考信号估计以下信息之一或其组合：相位噪声、相位偏转、及频率偏移。
  22. 根据权利要求21所述的通信装置，其特征在于：
    所述相位噪声参考信号包括M块，每块所述相位噪声参考信号在频域上映射到N个连续的子载波，在时域上每隔K个正交频分复用OFDM符号映射到至少一个OFDM符号，相邻两块所述相位噪声参考信号在频域上距离至少一个子载波，M为大于等于2的整数，N为大于等于1的整数，K为大于等于0的整数。
  23. 根据权利要求22所述的通信装置，其特征在于：
    所述相位噪声参考信号的预编码粒度为至少一块所述相位噪声参考信号。
  24. 根据权利要求23所述的通信装置，其特征在于：
    所述处理器，还用于接收所述预编码粒度。
  25. 一种计算机可读存储介质，包含指令，当其在计算机上运行时，使得计算机执行如权利要求1-8任一项所涉及的方法。
  26. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如权利要求1-8任一项所涉及的方法。
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