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WO2019129018A1 - Procédé et appareil d'envoi d'un signal de référence, procédé et appareil de réception d'un signal de référence, et dispositif - Google Patents

Procédé et appareil d'envoi d'un signal de référence, procédé et appareil de réception d'un signal de référence, et dispositif Download PDF

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Publication number
WO2019129018A1
WO2019129018A1 PCT/CN2018/123703 CN2018123703W WO2019129018A1 WO 2019129018 A1 WO2019129018 A1 WO 2019129018A1 CN 2018123703 W CN2018123703 W CN 2018123703W WO 2019129018 A1 WO2019129018 A1 WO 2019129018A1
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Prior art keywords
reference signal
time domain
csi
signaling
port
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Ceased
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PCT/CN2018/123703
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English (en)
Chinese (zh)
Inventor
梅猛
蒋创新
鲁照华
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset

Definitions

  • the present disclosure relates to the field of communications, for example, to a method and apparatus for transmitting and receiving a reference signal.
  • High-frequency communication is susceptible to phase noise and frequency offset. If the reference signal used for channel state estimation in the high frequency band is configured on different time-domain symbols, it will also be affected by the above two factors, resulting in the channel estimation process. A certain error occurs in this case, and when this error is large, the accuracy of the channel estimation is affected, thereby deteriorating the communication quality of the entire communication system.
  • phase noise phase noise
  • frequency offset frequency offset
  • the phase compensation of the data can solve the phase noise problem in the time-frequency domain of the data.
  • the reference signal for channel estimation for example, the channel state indication reference signal (CSI-RS) cannot solve the phase.
  • CSI-RS channel state indication reference signal
  • the embodiments of the present disclosure provide a method, an apparatus, and a device for transmitting and receiving a reference signal, so as to at least solve the problem that the channel estimation accuracy is low due to the influence of phase noise caused by the reference signal for performing channel estimation in the related art.
  • a method for transmitting a reference signal includes: a first transmission node transmitting a first reference signal and a second reference signal; wherein a time domain symbol of the second reference signal is A subset of the set of time domain symbols in which the first reference signal is located, the information transmitted by the second reference signal in each time domain symbol being the same.
  • a method for receiving a reference signal includes: receiving, by a second transmission node, a first reference signal and a second reference signal sent by a first transmission node; wherein the second reference signal The time domain symbol is a subset of the time domain symbol set in which the first reference signal is located, and the second reference signal transmits the same information in each time domain symbol.
  • a transmitting apparatus for a reference signal which is applied to a first transmitting node, and includes: a transmitting module, configured to send a first reference signal and a second reference signal; wherein the second The time domain symbol of the reference signal is a subset of the time domain symbol set of the first reference signal, and the second reference signal transmits the same information in each time domain symbol.
  • a receiving device for a reference signal which is applied to a second transmitting node, and includes: a receiving module, configured to receive a first reference signal and a second reference signal sent by the first transmitting node;
  • the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, and the information sent by the second reference signal in each time domain symbol is the same.
  • a computer readable storage medium having stored therein a computer program, wherein the computer program is configured to execute any of the methods described above at runtime The steps in the examples.
  • an apparatus comprising a memory and a processor, wherein the memory stores a computer program, the processor being configured to execute the computer program to perform any of the methods described above The steps in the examples.
  • the first transmission node sends the first reference signal and the second reference signal, where the second reference signal is located in a subset of the time domain symbol set of the first reference signal, and the second reference signal
  • the information sent in each time domain symbol is the same. That is, the information carried by the reference signal (the second reference signal) and the information of the channel state indication reference signal (the first reference signal) are the same, and the time domain symbols in which the channel state indication reference signal is located can be effectively estimated due to
  • the phase noise is a phase offset caused by a frequency offset or the like, and the channel state indication reference signal is phase-compensated by using the estimated phase offset, thereby solving the related art that the reference signal due to channel estimation cannot solve the influence of phase noise.
  • the problem of low channel estimation accuracy improves the accuracy of channel estimation.
  • FIG. 1 is a flowchart of a method of transmitting a reference signal according to an embodiment of the present disclosure.
  • FIG. 2 is a flow chart of a method of receiving a reference signal in accordance with an embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram of a method of configuring a reference signal in accordance with an alternative embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram (1) of a method of configuring a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram (2) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram (3) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram (4) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram (5) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram (6) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram (7) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram (8) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram (9) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram (10) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • FIG. 14 is a schematic diagram (11) of a configuration method of a reference signal according to an alternative embodiment of the present disclosure.
  • 15 is a structural block diagram of a transmitting apparatus of a reference signal according to an embodiment of the present disclosure.
  • 16 is a structural block diagram of a receiving device of a reference signal according to an embodiment of the present disclosure.
  • 17 is a hardware structure diagram of a device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic diagram of another hardware structure of a device in accordance with an embodiment of the present disclosure.
  • FIG. 1 is a flowchart of a configuration method of a reference signal according to an embodiment of the present disclosure. As shown in FIG. 1, the flow includes S102.
  • the first transmission node transmits the first reference signal and the second reference signal.
  • the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, and the information sent by the second reference signal in each time domain symbol is the same.
  • the foregoing first transit node includes, but is not limited to, a base station and a terminal.
  • the first transmitting node sends the first reference signal and the second reference signal, where the second reference signal is located in a subset of the time domain symbol set of the first reference signal, and the second reference signal
  • the information sent in each time domain symbol is the same. That is, the information carried by the reference signal (the second reference signal) and the information of the channel state indication reference signal (the first reference signal) are the same, and the time domain symbols in which the channel state indication reference signal is located can be effectively estimated due to
  • the phase noise is a phase offset caused by a frequency offset or the like, and the channel state indication reference signal is phase-compensated by using the estimated phase offset, thereby solving the related art that the reference signal due to channel estimation cannot solve the influence of phase noise.
  • the problem of low channel estimation accuracy improves the accuracy of channel estimation.
  • the port of the second reference signal is the same as the port of the first reference signal.
  • the above method further comprises S11.
  • the first transmitting node sends signaling to indicate that the second reference signal is enabled.
  • the signaling includes at least one of the following: a Radio Resource Control (RRC) signaling, a Media Access Control Control Element (MAC CE) signaling, and downlink control information (Downlink). Control information, referred to as DCI) signaling.
  • RRC Radio Resource Control
  • MAC CE Media Access Control Element
  • DCI Downlink control information
  • the solution of the above S11 solves the problem that the channel estimation accuracy is low due to the influence of the phase noise caused by the reference signal for channel estimation in the related art, and the accuracy of the channel estimation is improved.
  • S21 is further included before the first transmission node sends the first reference signal and the second reference signal.
  • the first transmission node configures a time domain density and/or a frequency domain density of the second reference signal.
  • the first transmission node configuring the time domain density and/or the frequency domain density of the second reference signal may include: configuring, by the first transmission node, a frequency domain density of the second reference signal according to the current bandwidth; or the first transmission node according to the The relationship between the second reference signal and the first reference signal configures a time domain density and/or a frequency domain density of the second reference signal; or the first transmission node configures a time domain density of the second reference signal by signaling And/or frequency domain density, the signaling includes at least one of the following: radio resource control signaling, media access control unit signaling, and downlink control information signaling.
  • phase shift between the time domain symbols in which the channel state indication reference signal is located due to phase noise or frequency offset or the like can be effectively estimated by the above S21.
  • the first transmission node configures a port number threshold and/or a time domain symbol number threshold of the first reference signal, where the port number threshold and/or the time domain symbol number threshold is set to indicate The first transmission node configures a maximum number of symbols in the time domain of the second reference signal.
  • the flexibility of the first transmission node to transmit the first reference signal and the second reference signal is improved by the foregoing manner, for example, the port number threshold and/or the time domain symbol number threshold of the channel state indication reference signal (first reference signal) exceeds
  • the first transmitting node sends the first reference signal and the second reference signal by using the sending method of the reference signal proposed in the embodiment.
  • the first transmission node pre-defines a multiplexing manner between different ports of the second reference signal and a multiplexing manner between different resource sets of the first reference signal.
  • the first transmitting node indicates, by at least one of the following signaling, a multiplexing relationship between different ports of the second reference signal: radio resource control signaling, media access control unit signaling, and downlink Control information signaling.
  • the first transmission node configures the second reference signal to have a higher transmission priority than the phase tracking reference signal; and the second reference signal and other reference signals When the collision occurs, the first transmission node configures the second reference signal to have a lower transmission priority than the other reference signals; wherein the other reference signals are reference signals other than the second reference signal and the phase tracking reference signal.
  • the time domain location and/or the frequency domain location where the second reference signal is located is determined by parameters of at least one of: a cell radio network temporary identifier, a cell identifier, an identifier for sequence initialization, and a reference for channel measurement.
  • the port location of the signal is determined by parameters of at least one of: a cell radio network temporary identifier, a cell identifier, an identifier for sequence initialization, and a reference for channel measurement.
  • the method further includes: the first transmission node pre-defining the physical resource block location of the second reference signal and the physical resource block location of the first reference signal.
  • the first transmitting node sends the first reference signal and the second reference signal to include S31.
  • the first transmission node performs transmission of the second reference signal according to the capability of the second transmission node.
  • the first transmission node pre-defines a subcarrier position of the second reference signal to a subcarrier position adjacent to the first reference signal configured by the first transmission node.
  • the first transmitting node configures different physical resource locations for the second reference signal at different times.
  • the first transmitting node determines a physical resource location of the second reference signal according to a frequency domain resource location allocated to the second transit node.
  • the pattern type of the second reference signal includes: a distributed pattern and a centralized pattern.
  • the pattern type of the second reference signal is indicated by at least one of the following signaling: radio resource control signaling, media access control unit signaling, and downlink control information signaling; physical resource block location and/or sub-portion of the second reference signal
  • the carrier location is indicated by at least one of the following signaling: radio resource control signaling, media access control unit signaling, and downlink control information signaling.
  • FIG. 2 is a flowchart of a receiving method of a reference signal according to an embodiment of the present disclosure. As shown in FIG. 2, the flow includes S202.
  • the second transmission node receives the first reference signal and the second reference signal sent by the first transmission node.
  • the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, and the second reference signal transmits the same information in each time domain symbol.
  • the foregoing second transmission node includes but is not limited to: a base station or a terminal.
  • the second transmission node receives the first reference signal and the second reference signal sent by the first transmission node, where the second reference signal is located in the time domain symbol of the second reference signal.
  • the information transmitted by the second reference signal in each time domain symbol is the same. That is, the information carried by the reference signal (the second reference signal) and the information of the channel state indication reference signal (the first reference signal) are the same, and the time domain symbols in which the channel state indication reference signal is located can be effectively estimated due to
  • the phase noise is a phase offset caused by a frequency offset or the like, and the phase offset is determined by using the estimated phase offset channel state indication reference signal, thereby solving the problem that the reference signal due to channel estimation cannot solve the phase noise effect in the related art.
  • the problem of low channel estimation accuracy improves the accuracy of channel estimation.
  • the port of the second reference signal is the same as the port of the first reference signal.
  • the first reference signal is a measurement reference signal.
  • the first reference signal is a Channel State Indication Reference Signal (CSI-RS).
  • the second reference signal is an additional CSI-RS.
  • the port of the additional CSI-RS is the same as one of the ports in a CSI-RS resource set.
  • the sequence of the additional CSI-RS is the same in each time domain symbol position, and may be a sequence of CSI-RS or a sequence of additional CSI-RS different from the CSI-RS configured by the base station, but the port of the additional CSI-RS configured is A port within the associated CSI-RS resource set.
  • the different resource sets of the CSI-RS in the following embodiments may also include CSI-RS ports having different Quasi Co-Location (QCL) relationships in the same resource set.
  • QCL Quasi Co-Location
  • the first transmission node transmits the first reference signal and the second reference signal.
  • the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, and the information sent by the second reference signal in each time domain symbol is the same.
  • the each time domain symbol is a different time domain symbol position on one subcarrier.
  • the information includes at least one of the following: a port and a sequence.
  • the second reference signal transmits the same port information or sequence information at different time domain symbol positions on one subcarrier.
  • the second reference signal may send different sequences in different time domain symbol positions on one subcarrier.
  • the information of the same channel state indication reference signal port is configured in multiple time domain symbol positions by signaling.
  • the signaling can be RRC, MAC CE or DCI signaling. This signaling is not enabled if the configured CSI-RS occupies only one time domain symbol.
  • the CSI-RS is enabled to copy a certain port information to other time domain symbol positions in the time domain symbol position.
  • the CSI-RS port information is copied by signaling, that is, the information of a certain port of the CSI-RS is copied to the CSI-RS.
  • the time domain symbol position is as shown in Figure 3.
  • a 32-port CSI-RS is configured, and the CSI-RS occupies 4 symbols in the time domain.
  • the same CSI-RS port information is configured in multiple time domain symbols.
  • the CSI-RS port P0 information shown in FIG. 3 is configured to the four time domain symbol positions occupied by the CSI-RS.
  • This configured reference signal is called additional CSI-RS, because the information carried by the reference signal and the information of a certain port of the CSI-RS are the same, so that the time domain symbols in which the CSI-RS is located can be effectively estimated. Due to phase noise or phase offset caused by frequency offset, etc., the estimated phase offset can effectively phase compensate the CSI-RS to solve the phase noise or the channel measurement error caused by the frequency offset.
  • the number of time domain symbols and the number of subcarriers occupied are different. Therefore, by default, the same number of additional CSI-RSs as the number of time domain symbols occupied by the CSI-RS can be configured, and the frequency domain location where the additional CSI-RS is located is related to the carrier location where the CSI-RS is located, that is, in the CSI-RS.
  • the configuration shown in FIG. 1 On the adjacent subcarriers, the configuration shown in FIG.
  • the additional CSI-RS is placed in the time domain symbol location where the CSI-RS is located, as shown in FIG. 4 Show.
  • a CSI-RS that fills all subcarrier positions is configured in the PRB0. Because the CSI-RS also has a certain period in the frequency domain, if the subcarrier position where the CSI-RS is not placed on the adjacent PRB, the same configuration can be configured. The number of symbols and the additional CSI-RS of the same symbol position.
  • the information carried by the additional CSI-RS is the same as the information of the corresponding CSI-RS port, two of the same symbol positions transmitting the same CSI-RS at the carrier position is a kind of information redundancy, in the CSI-RS.
  • the information sent by the port can be configured again without the same time domain symbol position of the additional CSI-RS. As shown in Figure 5.
  • the signaling uses the Phase Tracking Reference Signal (PTRS) to implement the function of transmitting the same port of the CSI-RS on multiple time-domain symbols.
  • PTRS Phase Tracking Reference Signal
  • the base station compensates the phase noise of the data by configuring the PTRS. Therefore, the phase noise of the CSI-RS multiple time domain symbol bits can be compensated by using the PTRS. As shown in Figure 6. At this time, the base station configures the PTRS, and the CSI-RS and the data have a QCL relationship, so the CSI-RS can calculate the relative phase difference between the multiple symbols by using the PTRS of the time domain symbol position, and thus is used for channel measurement. Phase compensation.
  • the PTRS-enabled signaling can be used to enable the CSI-RS to perform phase compensation.
  • the frequency domain density of the already configured PTRS, the PTRS orthogonality between multiple users and multiple base stations, the multiplexing mode, and the frequency domain location discrimination by using the UE-ID or the DMRS port number may be used for the pair.
  • the parameters for phase compensation by the CSI-RS may be used for the pair.
  • the frequency domain density of the additional CSI-RS is related to the frequency domain density of the CSI-RS: the maximum density of the frequency domain of the additional CSI-RS is the frequency domain density of the CSI-RS, and the frequency domain density interval of the additional CSI-RS is The change in the frequency domain density of the CSI-RS is proportional. It is assumed that the frequency domain density of the CSI-RS is 2 at this time, that is, the CSI-RS is configured once every two PRBs.
  • the frequency domain density of the additional CSI-RS is set to ⁇ 2, 4, 8 ⁇ based on the PRB, that is, the allocation CSI-RS can be configured once every 2, every 4, and every 8 PRBs;
  • the frequency domain density of the Additional CSI-RS can be set to ⁇ 1, 2, 4 ⁇ based on the frequency domain density of the CSI-RS.
  • the frequency domain density of the additional CSI-RS is set to 1, it indicates the same frequency domain density as the CSI-RS; when set to 2 or 4, the frequency domain density of the additional CSI-RS is set to the frequency domain density of the CSI-RS. 1/2 or 1/4. If the frequency domain density of the CSI-RS is set to transmit CSI-RS every 2 PRBs at this time, the above configuration is based on the CSI-RS frequency domain density as the reference ⁇ 1, 2, 4 ⁇ and the PRB number based ⁇ 2 , 4, 8 ⁇ are the same.
  • the frequency domain density of the additional CSI-RS is related to the allocated bandwidth.
  • the larger the bandwidth, the more sparse the frequency domain density of the additional CSI-RS, and the corresponding relationship between the frequency domain density of the additional CSI-RS and the allocated bandwidth is shown in Table 1.
  • BWthr is the threshold of the bandwidth
  • the frequency domain density of the additional CSI-RS is the same as the frequency domain density of the CSI-RS by default.
  • bw thr CSI-RS represents the Additional Bandwidth
  • ... BW thrM-1 and BW thrM represent the threshold bandwidth
  • den_CSI-RS represents the frequency domain of the CSI-RS density
  • den_CSI-RS indicates the frequency domain density of the additional CSI-RS.
  • the time domain density of the additional CSI-RS fills the number of time domain symbols occupied by all CSI-RS by default. Since the maximum number of ports currently supported by the CSI-RS is 32, which occupies four time domain symbols, the configured additional CSI is configured. - The maximum number of time domain symbols for the RS is 4.
  • the additional CSI-RS can also support a 1/2-density time domain configuration, that is, an additional CSI-RS is configured for every two time domain symbol positions.
  • the base station predefines a time domain density configuration of an additional CSI-RS, which is related to the number of ports of the CSI-RS and the number of time domain symbols occupied by the CSI-RS. For example, when the number of ports of the CSI-RS is less than 24, the configuration of the CSI-RS does not support occupying more than 2 symbols in the time domain. As shown in Table 2, when the number of ports of the CSI-RS is 8, 12 or 16. The CSI-RS occupies 2 symbols in the time domain.
  • the time domain density of the additional CSI-RS can only be configured to be 1, that is, the additional CSI-RS occupies the same number of symbols as the CSI-RS in the time domain;
  • the number of ports of the CSI-RS is 1, 2, 4, 8, or 12
  • the CSI-RS occupies 1 symbol bit in the time domain.
  • the additional CSI-RS does not exist in the time domain density (ie, in Table 2). Not present);
  • the number of CSI-RS ports is configured to be greater than or equal to 24, for example, the number of CSI-RS ports is configured to be 24 or 32, and the number of symbols occupied by the CSI-RS in the time domain may exceed 2 symbols, for example, when 32 is configured.
  • the time domain density of the additional CSI-RS only supports the density of 1, and when the port number is configured to be 24 or 32, the time domain density of the additional CSI-RS can be supported.
  • Two configurations, ⁇ 1, 1/2 ⁇ , are shown in Table 2.
  • the time domain density of the additional CSI-RS is configured to be 1/2, the additional CSI-RS occupies only two time domain symbols.
  • the time domain density of the Additional CSI-RS is configured by base station signaling, which may be high layer signaling or physical layer signaling.
  • the additional CSI-RS configured to phase compensate the channel measurement corresponding to the CSI-RS port 0 does not repeatedly transmit the information in the other subcarrier positions of the PRB in the time domain symbol position.
  • the transmission of the reference signal of one sign bit can be reduced. For example, when a 32-port CSI-RS is configured, if the time domain density of the additional CSI-RS is configured to be 1/2, then only one additional CSI-RS of the sign bit needs to be sent, as shown in FIG. 7.
  • the base station configures the time-frequency domain location of the additional CSI-RS according to the multiplexing mode of the CSI-RS.
  • the port configuration of the additional CSI-RS is related to the time domain symbol position of the CSI-RS port in the group.
  • the configuration of the additional CSI-RS is not affected. That is, if there are two CSI-RS groups: group1 and group2, group1 is configured to the 11th and 13th of the time slot. Symbolically, and group2 is configured on the 12th and 14th symbols of the slot, then the additional CSI-RS corresponding to CSI-RS group1 is placed on the 11th and 13th symbols, and the additional is corresponding to CSI-RS group2.
  • the CSI-RS is configured on the 12th and 14th symbols.
  • the additional CSI-RS When multiple groups of CSI-RSs are frequency division multiplexed, the additional CSI-RS also adopts frequency division multiplexing. As shown in Figure 8, the CSI-RS group1 where the CSI-RS port p0 is located and the CSI-RS group2 where the port p1 is located are frequency-division multiplexed. Therefore, the additional CSI-RS configured for the port p0 of the CSI-RS group1 at this time is shown. P0 and the additional CSI-RS p1 configured for port p1 of CSI-RS group 2 are also frequency division multiplexed.
  • TD-OCC Time Division-Orthogonal Covering Code
  • the additional CSI-RS configured by the base station may have multiple frequency domain location selection manners; the default additional CSI-RS frequency domain location is on the CSI-RS adjacent subcarriers, and at this time, only one set of CSI-RSs is configured. Additional CSI-RS port. Since the additional CSI-RS occupies only one subcarrier position at this time, the default configuration can effectively solve the phase noise compensation effect of the CSI-RS when the CSI-RS does not occupy all the subcarrier positions in the PRB.
  • the base station pre-defines a mapping rule to configure frequency domain locations of multiple sets of additional CSI-RSs.
  • the base station configures the subcarrier position of the additional CSI-RS according to the subcarrier position where the CSI-RS group is located, and configures a set of additional CSI-RSs of the CSI-RS configuration occupying the lower subcarrier position to the subcarrier with the lower subcarrier number.
  • the carrier position is configured to allocate an additional CSI-RS of a CSI-RS configuration with a higher subcarrier position to a subcarrier position with a higher subcarrier number.
  • the frequency domain density of the CSI-RS is set to not occupy all the PRB locations, it is assumed that the CSI-RS density is 1/2 at this time, and the CSI-RS is configured once every two PRBs as shown in FIG.
  • the additional CSI-RS can be configured in the PRB where the CSI-RS is not placed.
  • the CSI-RS is configured in the PRB0, and the additional CSI-RS can be configured on the PRB1 and configured in the subcarrier position of the corresponding CSI-RS port in the PRB0.
  • the CSI-RS can be effectively prevented from occupying one.
  • the PRB all subcarrier positions and the additional CSI-RS cannot be configured in the PRB position.
  • it can solve the problem that multiple sets of additional CSI-RS plus CSI-RS occupy subcarriers exceeding one PRB. It also avoids collision problems between additional CSI-RS and other reference signals.
  • Additional CSI-RS and other reference signals have multiplexing relationship of time division multiplexing or frequency division multiplexing
  • the CSI-RS can be configured with all time domain symbol positions within one subframe, which means that the CSI-RS may have a certain multiplexing relationship with other reference symbols.
  • the additional CSI-RS as an extension of the CSI-RS in the time domain and the frequency domain, is also multiplexed with other reference signals. Since the additional CSI-RS and the CSI-RS occupy the same time domain symbol position, the multiplexing relationship between the additional CSI-RS and other reference signals and the CSI-RS and other reference signals can be considered from the perspective of the time domain. identical.
  • the additional CSI-RS may have code division multiplexing.
  • the additional CSI-RS occupies one or more subcarriers compared with the subcarrier position occupied by the CSI-RS, there may be an collision between the additional CSI-RS and other reference signals in the frequency domain. Possible. If the additional CSI-RS and other reference signals collide in the frequency domain, the additional CSI-RS may be punctured, that is, only other reference signals are transmitted on the collision resource unit, and the additional CSI-RS is not sent.
  • the PTRS is punctured, that is, only the additional CSI-RS is sent on the resource unit of the collision, and the PTRS is not sent.
  • the additional CSI-RS may be moved to other subcarrier locations.
  • the processing is the same as the slot structure.
  • the structure of the communication system is not based on slot, that is, the number of symbols in each slot is not 14 symbols, that is, in the case of non-slot configuration, if CSI-RS is configured, the configuration of the above additional CSI-RS may be adopted. .
  • Different CSI-RS port configurations correspond to different additional CSI-RS configurations; for CSI-RSs occupying one time domain symbol position, there is no need to configure additional CSI-RS. It is assumed that for the 8-port CSI-RS, there are two ways to configure it: occupy 1 time domain symbol 8 subcarriers, or occupy 2 time domain symbols and configure 4 subcarriers on each symbol. There are also two configurations for the 12-port CSI-RS: occupy 1 time domain symbol 12 subcarriers, or occupy two time domain symbols and configure 6 subcarriers on each time domain symbol. The case where two time domain symbols are configured for the 8-port CSI-RS is as shown in FIG. In FIG.
  • the 8-port CSI-RS occupies 2 time-domain symbols, and 4 sub-carriers are arranged on each time-domain symbol.
  • the 12-port CSI-RS occupies two time domain symbols, as shown in FIG. In FIG. 10, the 12-port CSI-RS occupies 2 time domain symbols, and 6 subcarriers are arranged on each time domain symbol.
  • the CSI-RS port of the additional CSI-RS is located on the left time domain symbol (ie, the additional CSI)
  • the CSI-RS port of the RS is located on the first time-domain symbol of the two time-domain symbols occupied by the additional CSI-RS.
  • the configured additional CSI-RS only needs to configure one resource element (Resource Element, referred to as RE) is sufficient, that is, only the additional CSI-RS of the right time domain sign bit (referring to the position of the second time domain symbol of the two time domain symbols occupied by the additional CSI-RS) needs to be configured.
  • the additional CSI-RS configured at this time and the corresponding CSI-RS port send the same content, and the phase difference between the two can be calculated on different time domain symbols.
  • the current CSI-RS configuration also has 16 ports, 24 ports and 32 ports are more than 1 time domain symbol.
  • a description of the 32-port CSI-RS configuration has been made previously.
  • the configuration of the CSI-RS that occupies four time-domain symbols on the 24-port is similar to that of the 32-port, as shown in FIG. When the domain density configuration is 1/2, the CSI-RS pattern is shown in Figure 12.
  • the CSI-RS occupies four time domain symbol positions.
  • the 16-port CSI-RS configuration For the 16-port CSI-RS configuration, two time domain symbol positions are occupied. At this time, the 16-port CSI-RS occupies 8 subcarriers per time domain symbol. As shown in Figure 13.
  • the indication relationship of the time-frequency domain location of the additional CSI-RS between different users or different base stations is consistent with the CSI-RS. If the CSI-RSs of different base stations (transport nodes) need to indicate the time-frequency domain location by using the cell identity (CELL-ID), the same additional CELL-RS is indicated by the same CELL-ID.
  • CELL-ID cell identity
  • a frequency domain location of the reference signal a Cell Radio Network Temporary Identifier (C-RNTI), an ID for sequence initialization, a Cell-ID, and an associated The port position of the reference signal measured by the channel.
  • C-RNTI Cell Radio Network Temporary Identifier
  • SCID the ID used for sequence initialization is represented by SCID.
  • the SCIDs described below all represent an ID for sequence initialization.
  • MU-MIMO multiple user multiple input and multiple output
  • the reference signals between different UEs may be interfered if they are configured in the same subcarrier position. Therefore, In the scenario of multi-user MIMO, orthogonal reference signals can be configured to effectively avoid this situation.
  • the C-RNTI can be used to distinguish the RB level of the additional CSI-RS between different users. For example, for a scenario of two users, if the reference signals between two users are not distinguished, it is easy for two users to have additional CSI-RS configurations in the same frequency domain location, causing interference. Therefore, the frequency domain location should be differentiated for different users from the PRB level.
  • the UE-ID C-RNTI
  • different users' additional CSI-RSs are configured on different RBs.
  • the phase tracking reference signal of the UE1 is configured to the PRB0 according to the C-RNTI, and the phase tracking reference signal of the UE2 is configured to the PRB1. on.
  • Interferenceal CSI-RS from configurations of different base stations may also cause interference. Similar to the above principle, depending on the Cell-ID, the additional CSI-RSs that can be sent for different base stations are configured on different PRBs.
  • the additional CSI-RSs for different UEs are configured on different PRBs according to different UE-IDs.
  • the additional CSI-RSs of different base stations can be configured on different sub-carriers of the same PRB.
  • the additional CSI-RSs from the configuration of the two base stations are configured to different subcarrier positions according to different cell-IDs.
  • the additional CSI-RS configured by the base station 1 is configured on the subcarrier 0
  • the additional CSI-RS configured by the base station 2 is configured to the position of the subcarrier 1.
  • the additional CSI-RSs of different UEs are configured on different PRBs according to the UE-ID, and the additional CSI-RSs from different base stations are configured on different subcarriers of the same PRB by using different CELL-IDs. In this way, interference between different users and additional CSI-RSs of different base stations can be effectively avoided.
  • the use of the cell-ID to configure different PRB locations to place additional CSI-RSs from different base stations, and then use the UE-ID to configure different subcarrier locations within the same PRB to place additional users' additionals CSI-RS can also avoid interference between different base stations and additional CSI-RS between different users.
  • the additional CSI-RS configured by the base station is configured at different PRB positions at different times. For example, at different times, the location of the PRB where the additional CSI-RS is located is different. In the first subframe, the additional CSI-RS is configured at the position of PRB0, and in the second subframe, the additional CSI-RS is configured. The location of PRB1. In this case, in order to avoid interference between the different base stations or the additional CSI-RS between different terminals. Therefore, the physical resource locations of the additional CSI-RSs allocated by the base station to different terminals at different times or different base stations allocated to the same terminal are different at different times.
  • the base station needs to allocate the location of the material resource where the additional CSI-RS is located according to the frequency domain location occupied by the terminal. If the base station is configured with 8 physical resources of the PRB, according to the physical resource location of the previously reserved additional CSI-RS, for example, it is assumed that an additional CSI-RS is placed every 2 PRBs at this time, if the default additional CSI-RS is initial. The location is the first PRB. In this case, the additional CSI-RS is configured to place an additional CSI-RS in every 2 PRBs starting from PRB0. If the bandwidth used by the terminal is BWP (Bandwidth part), some PRBs in the middle are for example. 4 to the 7th PRB.
  • BWP Bandwidth part
  • the PTRS configured outside the bandwidth used by the terminal cannot compensate the phase noise of the terminal, and causes the corresponding additional CSI-RS due to the different frequency domain positions of the bandwidth used by the terminal.
  • the location of the physical resource block is different. Therefore, the base station needs to determine the physical resource location of the PTRS configured for the terminal according to the frequency domain location used by the terminal.
  • the base station performs the transmission of the reference signal according to the terminal capability; each terminal has different capabilities, and the configurations of the supported reference signals are also different.
  • the terminal 1 cannot support more than two subcarriers for the port in one PRB. Therefore, only one subcarrier or two subcarriers can be configured for the terminal 1 at this time. This also determines the number of physical resources of the terminal. And if there are some terminals that cannot perform excessive RRC signaling configuration, only the physical resource locations of the predefined reference signals can be used.
  • the pattern type of the second reference signal includes a distributed pattern and a centralized pattern.
  • the distributed pattern is a certain interval distribution on the BWP allocated to the terminal in the frequency domain different from the additional CSI-RS.
  • the centralized pattern is to concentrate the additional CSI-RSs corresponding to the same port into a certain PRB. Multiple subcarrier locations are either concentrated on multiple PRBs.
  • each PRB configures the CSI-RS.
  • the base station configures 100 PRBs for the terminal, and the CSI-RS is configured on the PRB0-PRB50, and all the sub-carriers on one PRB are configured with CSI-RS.
  • the RS is configured on the PRB that is configured with the CSI-RS for the terminal, such as the PRB 51.
  • the additional CSI-RS can occupy all the subcarrier positions of the entire PRB, or occupy several subcarrier positions, or occupy several subcarriers. position. As shown in Figure 14.
  • the base station can indicate whether the additional CSI-RS uses a centralized pattern by signaling, and the signaling can be at least one of the following signaling: RRC signaling, MAC CE signaling. And DCI signaling.
  • the PRB location of the centralized CSI-RS configured by default is the neighboring PRB of the PRB configuring the CSI-RS.
  • the occupied subcarrier position within a PRB defaults to the edge position of a PRB.
  • the subcarrier position of the centralized additional CSI-RS defaults to the edge position of one PRB, that is, the lowest sequenced subcarrier position or the highest sequenced subcarrier position.
  • the PRB location and subcarrier location of the centralized additional CSI-RS configuration may be configured by RRC signaling.
  • the port of the second reference signal and each port of the first reference signal are different.
  • the precoding of the additional CSI-RS may be that multiple precodings in the associated CSI-RS resource set are combined by a certain calculation method to obtain precoding, or may be configured by the first transmission node.
  • the port number is p0-p7.
  • the CSI-RS is not pre-coded.
  • a port is associated with the additional CSI.
  • the result of the -RS is not accurate enough, so the base station needs to configure the additional CSI-RS port to be p8, which is different from any one of the CSI-RS ports p0-p7.
  • a CSI-RS port When there are multiple sets of CSI-RS ports with QCL relationship in a CSI-RS resource set, if the QCL relationships of these CSI-RSs are the same, only one additional CSI-RS of the port needs to be configured, if there are different QCL relationships. For a CSI-RS port, you need to configure the corresponding number of additional CSI-RS ports based on the actual QCL relationship. For example, suppose that there are two sets of QSI-related CSI-RS ports in a CSI-RS resource set: p0-p3 is a QCL relationship, and p4-p7 is a QCL relationship. If the two QCL relationships are the same, then only one additional CSI-RS port needs to be configured for p0-p7. If the two QCL relationships are different and you need to configure the additional CSI-RS, you need to configure an additional CSI-RS port for p0-p3 and an additional CSI-RS port for p4-p7.
  • the method according to the foregoing embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware.
  • the technical solution of the present disclosure may be embodied in the form of a software product stored in a computer readable storage medium (such as a ROM/RAM, a magnetic disk, an optical disk), including a plurality of instructions for making
  • a terminal device which may be a mobile phone, a computer, a server, or a network device, etc. performs the method described in the embodiments of the present disclosure.
  • a device for transmitting a reference signal is provided, which is used to implement the foregoing embodiments and optional embodiments, and has not been described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • FIG. 15 is a structural block diagram of a transmitting apparatus of a reference signal applied to a first transmission node, as shown in FIG. 15, including a transmitting module 152, according to an embodiment of the present disclosure.
  • the sending module 152 is configured to send the first reference signal and the second reference signal, where the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, and the second reference signal is in each The time domain symbol sends the same information.
  • the foregoing first transit node includes but is not limited to: a base station or a terminal.
  • the first transmitting node sends the first reference signal and the second reference signal, where the second reference signal is located in a subset of the time domain symbol set of the first reference signal,
  • the information transmitted by the two reference signals in each time domain symbol is the same. That is, the information carried by the reference signal (the second reference signal) and the information of the channel state indication reference signal (the first reference signal) are the same, and the time domain symbols in which the channel state indication reference signal is located can be effectively estimated due to
  • the phase noise is a phase offset caused by a frequency offset or the like, and the channel state indication reference signal is phase-compensated by using the estimated phase offset, thereby solving the related art that the reference signal due to channel estimation cannot solve the influence of phase noise.
  • the problem of low channel estimation accuracy improves the accuracy of channel estimation.
  • the port of the second reference signal is the same as the port of the first reference signal.
  • a receiving device for a reference signal is further applied to the second transmitting node. As shown in FIG. 16, the device includes a receiving module 162.
  • the receiving module 162 is configured to receive the first reference signal and the second reference signal sent by the first transmitting node, where the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, where the The information transmitted by the two reference signals in each time domain symbol is the same.
  • the second transmission node receives the first reference signal and the second reference signal sent by the first transmission node, where the second reference signal is located in the time domain symbol set in the first reference signal. a subset of the second reference signal transmitted in the same time in each time domain symbol. That is, the information carried by the reference signal (the second reference signal) and the information of the channel state indication reference signal (the first reference signal) are the same, and the time domain symbols in which the channel state indication reference signal is located can be effectively estimated due to
  • the phase noise is a phase offset caused by a frequency offset or the like, and the channel state indication reference signal is phase-compensated by using the estimated phase offset, thereby solving the related art that the reference signal due to channel estimation cannot solve the influence of phase noise.
  • the problem of low channel estimation accuracy improves the accuracy of channel estimation.
  • the port of the second reference signal is the same as the port of the first reference signal.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • Embodiments of the present disclosure also provide a computer readable storage medium having stored therein a computer program, wherein the computer program is configured to execute the steps of any one of the method embodiments described above.
  • the above storage medium may be set to store a computer program for executing S1.
  • the first transmission node sends the first reference signal and the second reference signal, where the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, where the The information transmitted by the two reference signals in each time domain symbol is the same.
  • the storage medium is also arranged to store a computer program for performing the following S2.
  • the second transmission node receives the first reference signal and the second reference signal sent by the first transmission node, where the time domain symbol of the second reference signal is a time domain symbol set of the first reference signal The subset, the information transmitted by the second reference signal in each time domain symbol is the same.
  • the computer readable storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (Random Access Memory).
  • ROM Read-Only Memory
  • Random Access Memory Random Access Memory
  • FIG. 17 is a schematic diagram showing the hardware structure of the device provided in this embodiment.
  • the device includes a memory 310 and at least one processor 320.
  • the structure of the device is illustrated by taking a processor 320 as an example in FIG.
  • a memory program is stored in the memory 310, the processor 320 being arranged to run a computer program to perform the steps in any of the method embodiments described above.
  • the memory 310 and the processor 320 may be connected by a bus or other means, as shown in FIG. 17 by way of a bus connection.
  • FIG. 18 is a schematic diagram of another hardware structure of the device provided in this embodiment.
  • the device may include a transmission device 330 and an input and output device in addition to the memory 310 and the processor 320. 340, wherein the transmission device 330 is connected to the processor 320, and the input/output device 340 is connected to the processor 320.
  • the processor 320 may be configured to execute S1 by a computer program.
  • the first transmission node sends the first reference signal and the second reference signal, where the time domain symbol of the second reference signal is a subset of the time domain symbol set of the first reference signal, where the The information transmitted by the two reference signals in each time domain symbol is the same.
  • the above processor may be further configured to execute S2 by a computer program.
  • the second transmission node receives the first reference signal and the second reference signal sent by the first transmission node, where the time domain symbol of the second reference signal is a time domain symbol set of the first reference signal The subset, the information transmitted by the second reference signal in each time domain symbol is the same.
  • modules or steps of the present disclosure may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices. Alternatively, they may be implemented by program code executable by a computing device such that they may be stored in a storage device by a computing device and, in some cases, may be executed in a different order than herein.
  • the steps shown or described are either made separately into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.

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Abstract

L'invention concerne un procédé et appareil d'envoi d'un signal de référence, un procédé et appareil de réception d'un signal de référence, et un dispositif. Le procédé d'envoi comprend les étapes suivantes : un premier nœud de transmission envoie un premier signal de référence et un second signal de référence, un symbole d'un domaine temporel où se trouve le second signal de référence étant un sous-ensemble d'un ensemble de symboles d'un domaine temporel où se trouve le premier signal de référence, et les informations envoyées par le second signal de référence à chaque symbole du domaine temporel sont les mêmes.
PCT/CN2018/123703 2017-12-29 2018-12-26 Procédé et appareil d'envoi d'un signal de référence, procédé et appareil de réception d'un signal de référence, et dispositif Ceased WO2019129018A1 (fr)

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