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US20190379433A1 - Methods and devices for feeding back and configuring pilot parameters, user terminal and base station - Google Patents

Methods and devices for feeding back and configuring pilot parameters, user terminal and base station Download PDF

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Publication number
US20190379433A1
US20190379433A1 US16/346,481 US201716346481A US2019379433A1 US 20190379433 A1 US20190379433 A1 US 20190379433A1 US 201716346481 A US201716346481 A US 201716346481A US 2019379433 A1 US2019379433 A1 US 2019379433A1
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United States
Prior art keywords
reference signal
parameter
indication information
transmission
terminal
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US16/346,481
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English (en)
Inventor
Yijian Chen
Zhaohua Lu
Yu Ngok Li
Chuangxin JIANG
Bo Gao
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ZTE Corp
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ZTE Corp
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Assigned to ZTE CORPORATION reassignment ZTE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, YIJIAN, LI, YU NGOK, LU, ZHAOHUA, JIANG, Chuangxin
Publication of US20190379433A1 publication Critical patent/US20190379433A1/en
Assigned to ZTE CORPORATION reassignment ZTE CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE OMITTED FIFTH INVENTOR PREVIOUSLY RECORDED AT REEL: 049128 FRAME: 0004. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: CHEN, YIJIAN, LI, YU NGOK, GAO, BO, LU, ZHAOHUA, JIANG, Chuangxin
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • 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
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present disclosure relates to, but is not limited to, the field of wireless communications and, in particular, relates to a method and device for feeding back a reference signal parameter, a method and device for configuring a reference signal parameter, a user terminal and a base station.
  • a transmitting end may use multiple antennas to get a higher transmission rate. Multiple antennas can bring improvement of the signal-to-noise ratio and support more spatial multiplexing layers.
  • the multi-input multi-output (MIMO) technology with the channel state information (CSI) indication information (closed-loop MIMO precoding) used by the transmitting end provides a higher capacity and is a transmission technology used by the current mainstream 4G standard.
  • CSI channel state information
  • a receiving end feeds back channel information to the transmitting end.
  • the transmitting end uses the transmit precoding technology according to the obtained channel information to obtain the beamforming gain and the spatial multiplexing gain, thereby greatly improving the transmission performance.
  • the transmitting end uses the precoding vector matched with channel feature vector information to send the precoding.
  • the transmitting end performs efficient forming and interference cancellation according to the channel information.
  • the involved reference signal includes: a measurement reference signal, a demodulation reference signal and a phase noise compensation reference signal.
  • the measurement reference signal is mainly used for measurement and feedback of the receiving end.
  • CSI-RS downlink channel state information reference signal
  • SRS uplink sounding reference signal
  • the two types of reference signals are respectively used for downlink and uplink channel information CSI measurement and may be transmitted in a periodic or aperiodic mode.
  • reference may be made to 3GPP technical specifications, TS 36.211 and TS36.213. Measurement reference signals for multiple ports are supported in both the downlink and the uplink.
  • these reference signals may have some new designs, for example, may be transmitted in the manner of beam scanning, and the transmitting configuration will be more diverse.
  • measurement reference signals further exist due to other measurement requirements, such as measurement of the receive signal quality of some cells or sectors related to mobility management, measurement of large scale properties, etc.
  • These reference signals are also a type of measurement reference signal.
  • the above measurement functions may be implemented through the CSI-RS or the SRS.
  • Some other reference signals, such as a beam reference signal (BRS) or other measurement reference signals with other names may also be additionally transmitted.
  • BRS beam reference signal
  • the demodulation reference signal includes a data demodulation reference signal and a control demodulation reference signal.
  • the transmitting end may perform pre-coded data or control transmission according to the channel information, and may use one or more layers of multi-antenna transmission technology.
  • each layer has a corresponding demodulation reference signal (DMRS), and the data or control information is demodulated by using the channel estimated by the demodulation reference signal and combining the received signal.
  • the demodulation reference signal is divided into an uplink demodulation reference signal (UL DMRS) and a downlink demodulation reference signal (DL DMRS) respectively for demodulation of downlink control or data, and demodulation of uplink control or data.
  • UL DMRS uplink demodulation reference signal
  • DL DMRS downlink demodulation reference signal
  • phase noise compensation reference signal is generally used for phase compensation when the phase noise is relatively large, may also be used for frequency offset tracking, and therefore may also be considered as a frequency offset estimation reference signal.
  • the type of reference signal may appear alone or as part of the DMRS.
  • the type of reference signal may also be understood as a special demodulation reference signal. If the type of reference signal is defined on the transmission layer and each layer corresponds to a port of a phase noise supplemental reference signal, the type of reference signal may be considered as part of the DMRS.
  • a method and device for feeding back a reference signal parameter, a method and device for configuring a reference signal parameter, a user terminal and a base station are provided in the embodiments of the present disclosure.
  • the embodiments are as follows.
  • the method for feeding back a reference signal parameter includes steps described below.
  • a terminal determines at least one of a transmission parameter or a reception parameter of a reference signal.
  • the terminal feeds back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • the method for configuring a reference signal parameter includes steps described below.
  • a network side determines at least one of a transmission parameter or a reception parameter of a reference signal.
  • the network side configures the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • the device for feeding back a reference signal parameter includes: a determining unit and a transmitting unit.
  • the determining unit is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the transmitting unit is configured to feed back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the device for configuring a reference signal parameter includes: a determining unit and a configuration unit.
  • the determining unit is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the configuration unit is configured to configure the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the user terminal includes a processor and an antenna system.
  • the processor is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the antenna system is configured to feed back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the base station includes a processor and an antenna system.
  • the processor is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the antenna system is configured to configure the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • the terminal determines at least one of the transmission parameter or the reception parameter of the reference signal and feeds back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • the base station can refer to the UE's recommendation for more reasonable reference signal configuration, so that a good compromise between reference signal resource utilization and performance is achieved for different UEs.
  • FIG. 1 is a flowchart of a method for feeding back a reference signal parameter according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a method for configuring a reference signal parameter according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a correspondence between precoding and a reference signal according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram illustrating a mode of transmitting a measurement reference signal according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram illustrating a second mode of transmitting a measurement reference signal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram illustrating a third mode of transmitting a measurement reference signal according to an embodiment of the present disclosure
  • FIG. 7 is a structural diagram of a device for feeding back a reference signal parameter according to an embodiment of the present disclosure.
  • FIG. 8 is a structural diagram for a device for configuring a reference signal parameter according to an embodiment of the present disclosure
  • FIG. 9 is a structural diagram of a user terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a structural diagram of a base station according to an embodiment of the present disclosure.
  • the base station can decide which configuration to use after a simple judgment.
  • Such method may be sufficient in 4G, while differences in the following aspects exist in 5G.
  • the difference between terminals becomes larger, for example, the number of receive antennas of the terminal increases, and the configuration is greatly different; the application scenario of 5G is more complicated, and a wider communication frequency, the moving speed, more types of services need to be considered; the difference between requirements from terminals becomes larger; and the same reference signal may need to implement more functions.
  • the configuration of the reference signal in the 5G completely determined by the base station cannot be very accurate; and the configuration of the reference signal completely determined by the base station results in insufficient reference signal configuration flexibility, a good reference signal efficiency cannot be obtained, and a good compromise between reference signal resource utilization and performance cannot be achieved.
  • FIG. 1 is a flowchart of a method for feeding back a reference signal parameter according to an embodiment of the present disclosure. As shown in FIG. 1 , the method for feeding back a reference signal parameter according to the embodiment of the present disclosure includes steps described below.
  • a transmission parameter or a reception parameter of a reference signal is determined by a terminal.
  • a step 102 the terminal feeds back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • a type of the reference signal includes at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the reception parameter includes one or more of: receive antenna information, receive port information, receive beam information and receive mode information.
  • the transmission parameter includes one or more of: indication information about the number of repeated transmissions of demodulation reference signals having the same precoding; indication information about the number of symbols for transmitting the demodulation reference signal;
  • the sequence parameter includes: a sequence type
  • demodulation reference signal resources are grouped, and the terminal feeds back the at least one of the transmission parameter or the reception parameter to each of a plurality of different reference signal resource groups.
  • the resources are at least one of time domain resources, frequency domain resources, port resources, and beam resources.
  • the terminal agrees on with a base station or the base station configures a set having X 1 sets of demodulation reference signal parameters, and the terminal selects Y 1 sets of demodulation reference signal parameters from the set having X 1 sets of demodulation reference signal parameters and feeds back corresponding indication information to the base station.
  • Y 1 is less than or equal to X 1 .
  • the terminal feeds back the at least one of the transmission parameter or the reception parameter for each of a plurality of types of control channel configurations.
  • the terminal feeds back the at least one of the transmission parameter or the reception parameter for each of a plurality of different transmission areas.
  • the transmission areas are data transmission areas or control transmission areas.
  • the transmission parameter includes at least one of:
  • the number of repeated transmissions includes: the number of repeated transmissions of a reference signal corresponding to a same port; or the number of repeated transmissions of reference signals having a same transmission mode; or the number of repeated transmissions of reference signals having a same transmission mode in a same reference signal resource block; or the number of repeated transmissions of reference signal resource blocks having a same transmission mode; or a number of repeated transmissions of a reference signal corresponding to a same beam.
  • the terminal feeds back the reference signal parameter for each of P 1 types of measurement reference signals.
  • P 1 is an integer greater than 1.
  • reference signal resources are divided into P 2 groups of reference signal resources, and the terminal feeds back the reference signal parameter for each of the P 2 groups of reference signal resources.
  • P 2 is an integer greater than 1.
  • the transmission parameter includes one or more of:
  • FIG. 2 is a flowchart of a method for configuring a reference signal parameter according to an embodiment of the present disclosure. As shown in FIG. 2 , the method for configuring a reference signal parameter according to the embodiment of the present disclosure includes steps described below.
  • a network side determines at least one of a transmission parameter or a reception parameter of a reference signal.
  • the network side configures the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the network side is described by using a base station as an example, and another network element on the network side may also be used.
  • the base station configures the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • the base station configures the at least one of the transmission parameter or the reception parameter for each of a plurality of different transmission areas.
  • the transmission areas are data transmission areas or control transmission areas.
  • the reception parameter includes one or more of: receive antenna information, receive port information, receive beam information and receive mode information.
  • the transmission parameter includes indication information for a zero power demodulation reference signal.
  • the transmission parameter includes indication information about a sequence type of the demodulation reference signal.
  • the transmission parameter includes indication information about the number of repeated transmissions of demodulation reference signals having the same precoding.
  • the transmission parameter includes indication information about a precoding binding granularity of the demodulation reference signal.
  • Demodulation reference signal resources are grouped, and the terminal feeds back the at least one of the transmission parameter or the reception parameter to each of a plurality of different demodulation reference signal resource groups.
  • the resources are at least one of time domain resources, frequency domain resources, port resources, and beam resources.
  • the transmission parameter includes the number of measurement reference signal blocks to be transmitted.
  • the transmission parameter includes a rule for transmitting the measurement reference signal blocks.
  • the transmission parameter includes the number of time domain symbols included in the measurement reference signal blocks.
  • the transmission parameter includes a precoding/beam relationship between a plurality of measurement reference signals.
  • the transmission parameter includes the number of repeated transmissions of a reference signal corresponding to a same port.
  • the transmission parameter includes the number of repeated transmissions of reference signals having a same transmission mode.
  • a transmission mode includes: a transmission beam, a transmission sequence and a transmission antenna.
  • a base station divides measurement reference signal resources into P 2 groups of reference signal resources, and configures the at least one of the transmission parameter or the reception parameter for each of the P 2 groups of reference signal resources.
  • P 2 is an integer greater than 1.
  • the transmission parameter includes indication information about the number of symbols for transmitting a phase noise compensation reference signal.
  • the transmission parameter includes indication information about a time domain density of a resource for transmitting the phase noise compensation reference signal.
  • the transmission parameter includes indication information about a frequency domain density of the resource for transmitting the phase noise compensation reference signal.
  • the transmission parameter includes indication information about a position of the phase noise compensation reference signal.
  • the transmission parameter includes indication information about a sequence parameter of the phase noise compensation reference signal.
  • the transmission parameter includes indication information about a transmission power of the phase noise compensation reference signal.
  • the transmission parameter includes indication information about the number of precoding ports of the phase noise compensation reference signal.
  • a transmission parameter of a demodulation reference signal is determined by a terminal and may include indication information about a sequence parameter of the demodulation reference signal.
  • the sequence parameter of the demodulation reference signal may include a type of the sequence, for example, a Zadoff-off (ZC) sequence or a Pseudo-Noise (PN) sequence may be selected for the DMRS.
  • ZC sequence may be well used for time-frequency offset estimation. When other signals cannot be used for the time-frequency offset estimation or cannot meet some requirements of time-offset estimation or frequency offset estimation, or no other available reference signal exists for performing the time-frequency offset estimation, a base station may configure the ZC sequence for the terminal.
  • the time-frequency offset estimation information may be obtained by referring to other signals, a simpler PN sequence may be used.
  • the number of frequency domain symbols that the PN sequence needs to occupy may be less, which is more advantageous for overhead.
  • the PN sequence is a real sequence, which is also simpler in processing.
  • the size of the actual frequency offset of the UE and the distance between the terminal and the base station needs to be considered for determining whether to configure the ZC sequence. If performance of the crystal oscillator of the UE is relatively good, the frequency offset is small, the terminal is close to the base station, and the delay is not large, a use of the PN sequence can be considered.
  • the base station may use, by default, the transmission parameter of the demodulation reference signal determined by the terminal, such as the sequence parameter of the demodulation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the sequence parameter of the demodulation reference signal which is then configured to the terminal.
  • the sequence is selected by furthering considering the possibility that multiple users simultaneously perform space division transmission, and cannot simply be determined by the recommended parameter of the terminal.
  • a transmission parameter of a demodulation reference signal is determined by a terminal and may include indication information about the number of repeated transmissions of demodulation reference signals having the same precoding.
  • the terminal may determine the parameter according to the configuration of a receive beam. Since the terminal expects at this time that the demodulation reference signals having the same precoding are repeatedly transmitted in the time domain for blind detection of the receive beam, the parameter is related to the setting of the receive beam.
  • the demodulation reference signals corresponding to the same precoding 1 are repeatedly transmitted on M 1 time domain symbols
  • the demodulation reference signals corresponding to the precoding 2 are repeatedly transmitted on M 2 time domain symbols.
  • M 1 and M 2 may be fed back from the terminal to the base station.
  • the fed-back parameter represents a configuration value recommended by the terminal to the base station.
  • the repeated transmission here is not limited to the continuous repeated transmission.
  • the repeated transmission refers to that demodulation reference signals are transmitted on multiple time domain symbols by using the same precoding.
  • the sequence of the demodulation reference signals is not limited. The transmission power of the demodulation reference signals and the transmission bandwidths of the demodulation reference signals are exactly the same.
  • the base station may use, by default, the transmission parameter of the demodulation reference signal determined by the terminal, such as indication information about the number of repeated transmissions of demodulation reference signals having the same precoding, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about the number of repeated transmissions of demodulation reference signals having the same precoding which is then configured to the terminal.
  • a transmission parameter of a demodulation reference signal is determined by a terminal and may include indication information about a precoding binding granularity of the demodulation reference signal.
  • the demodulation reference signal may be divided into multiple subcarrier groups or multiple resource block (RB) groups in the time domain, and the subcarrier groups or RB groups are defined and notified to a base station.
  • RB resource block
  • the base station may use, by default, the transmission parameter of the demodulation reference signal determined by the terminal, such as indication information about a precoding binding granularity of the demodulation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a precoding binding granularity of the demodulation reference signal which is then configured to the terminal.
  • a transmission parameter of a demodulation reference signal is determined by a terminal and may include indication information about the number of symbols for transmitting the demodulation reference signal or indication information about a time domain density of a resource for transmitting the demodulation reference signal.
  • the number of symbols for transmitting the demodulation reference signal or the time domain density depends on the moving speed of the terminal.
  • the terminal may estimate the moving speed of the terminal itself according to a characteristic of a measurement signal and considers in conjunction with the estimation result of the moving speed the appropriate number of symbols for transmitting the demodulation reference signal or density which are then recommended to a base station.
  • the transmission parameter of the demodulation reference signal is determined by the terminal and may include indication information about a frequency domain density of the resource for transmitting the demodulation reference signal.
  • the indication information about send resource frequency domain density of the demodulation reference signal depends on the richness of the multipath, and is related to the scenario in which the terminal is located.
  • the terminal may estimate the frequency domain selective fading size, i.e., the frequency domain correlation size, according to the characteristics of some measurement signals, and recommend an appropriate demodulation reference signal frequency domain density to the base station.
  • the terminal since the terminal is clearer about the frequency domain correlation, the terminal may recommend the frequency domain density of the precoding for the demodulation reference signal to the base station.
  • the binding refers to that reference signals on a segment of frequency domain resources are restricted to having the same precoding.
  • the terminal may estimate, according to the measured channel characteristics, the losses of performance and the gains of the DMRS frequency domain precoding bindings caused by different granularity bindings, thereby recommending appropriate binding granularity.
  • the transmission parameter of the demodulation reference signal is determined by the terminal and may further include indication information about a position of transmitting the demodulation reference signal. Information about the time-frequency density, the number of symbols and the number of subcarriers is implicit in the position indication information.
  • the base station may use, by default, the transmission parameter of the demodulation reference signal determined by the terminal, such as indication information about the number of symbols for transmitting the demodulation reference signal or indication information about a time domain density of a resource for transmitting the demodulation reference signal or indication information about a position of transmitting the demodulation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about the number of symbols for transmitting the demodulation reference signal or the indication information about a time domain density of a resource for transmitting the demodulation reference signal or the indication information about a position of transmitting the demodulation reference signal which are then configured to the terminal.
  • the transmission parameter of the demodulation reference signal is determined by the terminal and may include indication information about a transmission power of the demodulation reference signal.
  • the transmission power may be a relative value, may be a power difference between different ports of the demodulation reference signal, a power difference between demodulation reference signals on different beams or having different precodings, or a power difference between the demodulation reference signal transmission and data information transmission, or a power difference between the demodulation reference signal transmission and control information transmission.
  • the base station may use, by default, the transmission parameter of the demodulation reference signal determined by the terminal, such as indication information about a transmission power of the demodulation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a transmission power of the demodulation reference signal which is then configured to the terminal.
  • a reception parameter of a demodulation reference signal is determined by a terminal and may include receive antenna information of the demodulation reference signal, receive port information of the demodulation reference signal, receive beam information of the demodulation reference signal and receive mode information of the demodulation reference signal.
  • the terminal may inform the base station of the receive antenna to be used for receiving the demodulation reference signal.
  • the terminal may inform the base station the receive port to be used for receiving the demodulation reference signal.
  • the terminal may inform the base station the receive beam to be used for receiving the demodulation reference signal.
  • the terminal may inform the base station of the to-be-used mode of receiving the demodulation reference signal.
  • the terminal may feed back the corresponding reception parameter of the demodulation reference signal to each of the multiple demodulation reference signal resource groups.
  • the base station may use, by default, the reception parameter of the demodulation reference signal determined by the terminal, such as the receive antenna information of the demodulation reference signal, the receive port information of the demodulation reference signal, the receive beam information of the demodulation reference signal and the receive mode information of the demodulation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the receive antenna information of the demodulation reference signal, the receive port information of the demodulation reference signal, the receive beam information of the demodulation reference signal and the receive mode information of the demodulation reference signal which are then configured to the terminal.
  • the base station may configure the corresponding reception parameter of the demodulation reference signal to each of the multiple demodulation reference signal resource groups.
  • the base station agrees on with the terminal agree on a set having X 1 sets of demodulation reference signal parameters in which one or more types of one or more types parameters mentioned in the foregoing embodiments are included. A difference exists in the value of one or more parameters between every two sets of the set having X 1 sets of demodulation reference signal parameters.
  • the terminal selects Y 1 sets of demodulation reference signal parameters from the set having X 1 sets of demodulation reference signal parameters and feeds back the corresponding indication information to the base station.
  • Y 1 is a positive integer less than or equal to X 1 .
  • a terminal may group the demodulation reference signal resources, and feeds back at least one of some of the transmission and reception parameters mentioned in the foregoing embodiments for each of the plurality of different demodulation reference signal resource groups.
  • Multiple modes of grouping are provided. One mode is to group, according to the ports, into multiple demodulation reference signal port groups, for example, different ports are grouped into different groups, and of course, multiple ports may be included in one group.
  • Another mode is to group, according to time domain symbols, the time domain symbols on which the demodulation reference signals are located into a plurality of symbol groups. Grouping may also be performed in the frequency domain, for example, multiple segments of frequency domain resources are divided into, and the demodulation reference signals on each segment of frequency domain resources are in a group. Or demodulation reference signals transmitted on different beams are divided into different groups. Then the terminal feeds back the reference signal parameter for each group of demodulation reference signals.
  • the base station may also group the demodulation reference signal resources, and configures at least one of some of the send and reception parameters mentioned in the foregoing embodiments for each of a plurality of different resource groups.
  • the base station and the terminal may use the same mode of grouping, and may also use a separate mode of grouping.
  • control channels can exist in the uplink or downlink. Different control channels have different transmission parameters. Some control channels have good robustness and some control channels have high transmission efficiency.
  • the terminal may configure at least one of the transmission parameter or the reception parameter for each of the multiple types of control channels.
  • Multiple transmission areas may exist in the uplink or downlink control channel or in the uplink or downlink data channel.
  • the terminal feeds back at least one of the transmission parameter or the reception parameter for each of the multiple different transmission areas.
  • the uplink and downlink measurement reference signals are transmitted in multiple modes, and one mode of transmitting the measurement reference signal is as shown in FIG. 4 .
  • M different beams may be transmitted on each scanning block, and M beams may occupy different time domain symbols.
  • the receiving end may perform measurement and select the best beam. Since the receiving end may also have multiple antennas and multiple receive beams may be formed, the transmitting end may periodically send these scanning blocks, or send N scanning blocks for multiple times in succession, so that the receiving end performs measurement on the quality of transmission beams corresponding to different receive beams. It should be noted that although the transmission beams in every scanning block are the same in the given example herein, a case where the transmission beams in every scanning block are not identical also exists. The numbers of symbols and the numbers of beams transmitted in the measurement reference signal blocks may also be different.
  • FIG. 5 Another transmission case is described as shown in FIG. 5 .
  • Multiple same transmission beams are included in one scanning block, and different scanning blocks correspond to different transmission beams.
  • the receiving end may also complete measurement and selection of the receive and transmission beams.
  • multiple beams are transmitted in one scanning block, and each beam may be repeated for multiple times.
  • Transmission of the measurement reference signal mentioned above is merely transmission at one port.
  • a beam may be changed on a symbol in a different time domain for a port and a different beam may be transmitted.
  • existence of multiple ports at the same time on a time domain symbol may also be included, and each port may correspond to a transmit-antenna channel.
  • beams in the same direction or in different directions may be transmitted on each antenna channel beams.
  • the terminal may determine the transmitting rule of the measurement reference signal block according to its own capability of switching of the transmission beam or the receive beam, and feeds back the transmitting rule to the base station.
  • the base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as a rule for transmitting a measurement reference signal block, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the rule for transmitting a measurement reference signal block which is then configured to the terminal.
  • the number of time domain symbols included in the measurement reference signal block may also be determined by the terminal and fed back to the base station.
  • the number of time domain symbols generally implies setting information of the number of receive beams or the number of transmission beams.
  • the terminal is clearer about its own beam setting.
  • the base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as the number of time domain symbols included in the measurement reference signal block, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the number of time domain symbols included in the measurement reference signal block which is then configured to the terminal.
  • the transmission parameter of the measurement reference signal is determined by the terminal, and may include the number of measurement reference signal blocks to be transmitted.
  • the number of measurement reference signal blocks to be transmitted also implies setting information of the number of receive beams or the number of transmission beams. Since the terminal is relatively clear about the number of receive or transmission beams that the terminal expects to train, a parameter of the number of scanning blocks to be transmitted, which may also be referred to as the number of measurement reference signal blocks to be transmitted, may be transmitted to the base station.
  • the base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as the number of measurement reference signal blocks to be transmitted, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the number of measurement reference signal blocks to be transmitted which is then configured to the terminal.
  • the number of repeated transmissions of the measurement reference signal may also be determined by the terminal and includes: the number of repeated transmissions of a reference signal corresponding to a same port; or the number of repeated transmissions of reference signals having a same transmission mode; or the number of repeated transmissions of reference signals transmitted in the same mode in a same reference signal resource block; or the number of repeated transmissions of reference signal resource blocks having a same transmission mode; or the number of repeated transmissions of a reference signal corresponding to a same beam.
  • the base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as the number of repeated transmissions of the measurement reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the number of repeated transmissions of the measurement reference signal which is then configured to the terminal.
  • a transmission parameter of a measurement reference signal is determined by a terminal and may be indication information about precoding corresponding to the measurement reference signal.
  • the information is used for indicating the precoding of the measurement reference signal, that is, the mode of forming a beam.
  • a base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as the precoding corresponding to the measurement reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the precoding corresponding to the measurement reference signal which is then configured to the terminal.
  • a set of candidate precodings and an optional precoding set corresponding to the measurement reference signal may also be determined by the terminal and fed back to the base station, and the base station may select precoding from the set for beam generation.
  • the base station selects the precoding corresponding to the measurement reference signal which is then configured to the terminal.
  • the terminal may also feed back a binding relationship of precodings or beams in the resource block of the measurement reference signal. For example, when a certain beam is transmitted, multiple time domain symbols or frequency domain resources need to be bound.
  • the base station may use, by default, the transmission parameter of the measurement reference signal determined by the terminal, such as the binding relationship of precodings or beams, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the binding relationship of precodings or beams which is then configured to the terminal.
  • a reception parameter of a measurement reference signal is determined by a terminal and may include receive antenna information of the measurement reference signal, receive port information of the measurement reference signal, receive beam information of the measurement reference signal and receive mode information of the measurement reference signal.
  • the terminal may inform the base station of the receive antenna to be used for receiving the measurement reference signal.
  • the terminal may inform the base station the receive port to be used for receiving the measurement reference signal.
  • the terminal may inform the base station the receive beam to be used for receiving the measurement reference signal.
  • the terminal may inform the base station of the to-be-used mode of receiving the measurement reference signal.
  • the terminal may feed back the corresponding reception parameter of the measurement reference signal to each of the multiple sets of measurement reference signals.
  • the base station may use, by default, the reception parameter of the measurement reference signal determined by the terminal, such as the receive antenna information of the measurement reference signal, the receive port information of the measurement reference signal, the receive beam information of the measurement reference signal and the receive mode information of the measurement reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the receive antenna information of the measurement reference signal, the receive port information of the measurement reference signal, the receive beam information of the measurement reference signal and the receive mode information of the measurement reference signal which are then configured to the terminal.
  • the base station may configure the corresponding reception parameter of the measurement reference signal to each of the multiple sets of measurement reference signals.
  • the multiple types of measurement reference signals are divided into P 1 groups.
  • the terminal feeds back the reference signal parameter, including at least one of a transmission parameter or a reception parameter, for each of the P 1 groups of measurement reference signals.
  • P 1 is an integer greater than 1.
  • the multiple sets of measurement reference signals are divided into P 2 groups of reference signal resources.
  • the terminal feeds back the reference signal parameter, including at least one of a transmission parameter or a reception parameter, for each of the P 2 groups of measurement reference signals.
  • P 2 is an integer greater than 1.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about the number of symbols for transmitting the phase noise compensation reference signal, such as the number of occupied symbols in one subframe or the number of occupied symbols in one slot.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about the number of symbols for transmitting the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about the number of symbols for transmitting the phase noise compensation reference signal which is then configured to the terminal.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about a time domain density of a resource for transmitting the phase noise compensation reference signal.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about a time domain density of a resource for transmitting the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a time domain density of a resource for transmitting the phase noise compensation reference signal which is then configured to the terminal.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about a frequency domain density of a resource for transmitting the phase noise compensation reference signal, such as an interval between phase noise compensation reference signals in the frequency domain.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about a frequency domain density of a resource for transmitting the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a frequency domain density of a resource for transmitting the phase noise compensation reference signal which is then configured to the terminal.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about a position of the phase noise compensation reference signal, such as a pattern of the phase noise compensation reference signal.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about a position of the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a position of the phase noise compensation reference signal which is then configured to the terminal.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about a sequence parameter of the phase noise compensation reference signal, such as indication of a type of a sequence and indication of an initialization parameter of the sequence.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about a sequence parameter of the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a sequence parameter of the phase noise compensation reference signal which is then configured to the terminal.
  • a transmission parameter of a phase noise compensation reference signal is determined by a terminal and may include indication information about a transmission power of the phase noise compensation reference signal, such as an absolute value of the transmission power, or a power offset relative to the demodulation reference signal, or a power offset relative to the data, or a power offset relative to the synchronization signal, or a power offset relative to the control channel, or a power offset relative to the measurement reference signal etc.
  • the base station may use, by default, the transmission parameter of the phase noise compensation reference signal determined by the terminal, such as the indication information about a sequence parameter of the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the indication information about a sequence parameter of the phase noise compensation reference signal which is then configured to the terminal.
  • a reception parameter of a phase noise compensation reference signal is determined by a terminal and may include receive antenna information of the phase noise compensation reference signal, receive port information of the phase noise compensation reference signal, receive beam information of the phase noise compensation reference signal and receive mode information of the phase noise compensation reference signal.
  • the terminal may inform the base station of the receive antenna to be used for receiving the phase noise compensation reference signal.
  • the terminal may inform the base station the receive port to be used for receiving the phase noise compensation reference signal.
  • the terminal may inform the base station the receive beam to be used for receiving phase noise compensation reference signal.
  • the terminal may inform the base station of the to-be-used mode of receiving the phase noise compensation reference signal.
  • the terminal may feed back the corresponding reception parameter of the phase noise compensation reference signal to each of the multiple sets of phase noise compensation reference signals.
  • the base station may use, by default, the reception parameter of the phase noise compensation reference signal determined by the terminal, such as the receive antenna information of the phase noise compensation reference signal, the receive port information of the phase noise compensation reference signal, the receive beam information of the phase noise compensation reference signal and the receive mode information of the phase noise compensation reference signal, and the parameter does not need to be configured again through downlink signaling.
  • the base station may also have the final decision, and may take into account other factors to finally decide the receive antenna information of the phase noise compensation reference signal, the receive port information of the phase noise compensation reference signal, the receive beam information of the phase noise compensation reference signal and the receive mode information of the phase noise compensation reference signal which are then configured to the terminal.
  • the base station may configure the corresponding reception parameter of the phase noise compensation reference signal to each of the multiple sets of phase noise compensation reference signals.
  • FIG. 7 is a structural diagram of a device for feeding back a reference signal parameter according to an embodiment of the present disclosure.
  • the device for feeding back a reference signal parameter according to the embodiment of the present disclosure includes a determining unit 70 and a transmitting unit 71 .
  • the determining unit is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the transmitting unit 71 is configured to feed back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the reception parameter includes at least one of: receive antenna information, receive port information, receive beam information or receive mode information.
  • the transmission parameter includes at least one of:
  • the sequence parameter includes: a sequence type, indication information about a transmission power of the demodulation reference signal, and indication information about a precoding binding granularity of the demodulation reference signal.
  • the transmission parameter includes at least one of:
  • the determination unit or the like shown in FIG. 7 may be implemented by a microprocessor, a field programmable gate array (FPGA), a digital signal processor, and the like.
  • the transmitting unit may be implemented by an antenna system.
  • FIG. 8 is a structural diagram of a device for configuring a reference signal parameter according to an embodiment of the present disclosure. As shown in FIG. 8 , the device for configuring a reference signal parameter according to the embodiment of the present disclosure includes a determining unit 80 and a configuration unit 81 .
  • the determining unit 80 is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the configuration unit 81 is configured to configure the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the configuration unit 81 is further configured to perform an operation described below.
  • the at least one of the transmission parameter or the reception parameter is configured for each of a plurality of different transmission areas.
  • the transmission areas are data transmission areas or control transmission areas.
  • the reception parameter includes at least one of: receive antenna information, receive port information, receive beam information or receive mode information.
  • the determination unit or the like shown in FIG. 8 may be implemented by a microprocessor, an FPGA, a digital signal processor, and the like.
  • the configuration unit may be implemented by a processor or a processing chip or the like having an antenna system.
  • FIG. 9 is a structural diagram of a user terminal according to an embodiment of the present disclosure.
  • the user terminal according to the embodiment of the present disclosure includes a processor 90 , an antenna system 91 , a memory 92 and the like.
  • the processor 90 is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the antenna system 91 is configured to feed back the at least one of the transmission parameter or the reception parameter of the reference signal to a base station.
  • the processor 92 stores executable instructions of the processor 90 , and is configured to support communication applications and the like of the user equipment.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the transmission parameter when the type of the reference signal is the demodulation reference signal, the transmission parameter includes at least one of:
  • the sequence parameter includes: a sequence type, indication information about a transmission power of the demodulation reference signal, and indication information about a precoding binding granularity of the demodulation reference signal.
  • the transmission parameter includes at least one of:
  • FIG. 10 is a structural diagram of a base station according to an embodiment of the present disclosure.
  • the base station according to the embodiment of the present disclosure includes a processor 1000 , an antenna system 1001 , a processor 1002 and the like.
  • the processor 1000 is configured to determine at least one of a transmission parameter or a reception parameter of a reference signal.
  • the antenna system 1001 is configured to configure the at least one of the transmission parameter or the reception parameter of the reference signal for a terminal through downlink signaling.
  • the processor 1002 stores executable instructions of the processor 1000 , and is configured to support communication applications and the like of the user equipment.
  • a type of the reference signal is at least one of: a demodulation reference signal, a measurement reference signal or a phase noise compensation reference signal.
  • the processor 1000 is further configured to configure at least one of the transmission parameter or the reception parameter for each of a plurality of different transmission areas.
  • the transmission areas are data transmission areas or control transmission areas.
  • An embodiment of the present disclosure further provides a computer-readable storage medium configured to store computer-executable instructions which, when executed by a processor, execute the method described in the above embodiments.
  • the devices and the methods disclosed in the embodiments of the present disclosure may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the unit division is merely a logical function division, and, in practice, the unit division may be implemented in other ways.
  • multiple units or components may be combined or may be integrated into another system, or some features may be omitted or not executed.
  • coupling, direct coupling or communication connections between the presented or discussed components may be indirect coupling or communication connections, via interfaces, between devices or units, and may be electrical, mechanical or in other forms.
  • the units described above as separate components may or may not be physically separated.
  • Components presented as units may or may not be physical units, that is, may be located in one place or may be distributed over multiple network units. Part or all of these units may be selected according to actual requirements to achieve objects of the solutions in the embodiments of the present disclosure.
  • various function units in the embodiments of the present disclosure may all be integrated in one processing unit, or each unit may be used as a separate unit, or two or more units may be integrated into one unit.
  • the integrated function unit may be implemented by hardware or may be implemented by hardware plus a software function unit.
  • the term, computer storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data).
  • the computer storage medium includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a flash memory or other memory technologies, a compact disc-read only memory (CD-ROM), a digital versatile disc (DVD) or other optical disc storage, a magnetic cassette, a magnetic tape, a magnetic disk storage or other magnetic storage apparatuses, or any other media used for storing desired information and accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc-read only memory
  • DVD digital versatile disc
  • magnetic cassette a magnetic tape
  • magnetic disk storage or other magnetic storage apparatuses, or any other media used for storing
  • the communication medium generally includes the computer-readable instructions, the data structures, the program modules, or other data in modulated data signals such as carriers or other transmission mechanisms, and may include any information delivery medium.

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