WO2018126979A1 - 一种配置参考信号的方法和装置 - Google Patents
一种配置参考信号的方法和装置 Download PDFInfo
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- WO2018126979A1 WO2018126979A1 PCT/CN2017/119357 CN2017119357W WO2018126979A1 WO 2018126979 A1 WO2018126979 A1 WO 2018126979A1 CN 2017119357 W CN2017119357 W CN 2017119357W WO 2018126979 A1 WO2018126979 A1 WO 2018126979A1
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- reference signal
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- configuration information
- user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
Definitions
- the present application relates to the field of communications, and in particular, to a method and apparatus for configuring a reference signal.
- the reference signal (English: reference signal, abbreviation: RS) is a signal that both the transmitting and receiving parties are predicting.
- the receiving end can use the reference signal sent by the transmitting end to perform channel estimation, and estimate the data signal sent by the transmitting end according to the channel estimation result.
- the method for configuring the reference signal provided in the communication standard is as follows: in a transmission process, a reference signal corresponding to each port (ie, an antenna port) is usually generated according to a fixed sequence, and then according to the number of available ports, in a fixed mapping manner, The reference signal corresponding to each port is mapped to a physical resource block (English: physical resource block, abbreviation: PRB).
- PRB physical resource block
- the reference signal in a single transmission process, as long as the number of available ports is determined, the reference signal may be configured according to preset information, such as a fixed mapping manner and a function of a reference signal. Moreover, once the reference signal corresponding to each port is configured, its configuration information does not change. Therefore, when the technical solution is applied to a complicated and varied scene, such as a high-band scene or a high-frequency selection scene, the channel estimation result is inaccurate.
- Embodiments of the present invention provide a method and apparatus for configuring a reference signal for improving the accuracy of channel estimation results in a complex and varied scenario.
- a method for configuring a reference signal includes: determining configuration information of a first reference signal; the first reference signal is a reference signal corresponding to a first port that can be used in a single transmission process, and is usable during transmission.
- the port further includes a second port, where the configuration information of the reference signal corresponding to the second port is different from the configuration information of the first reference signal; and then, configuring the first reference signal according to the configuration information of the first reference signal.
- the configuration information of the reference signals corresponding to different ports may be different in one transmission process, that is, the technical solution of configuring the reference signals by using the port as the granularity, and the number of available ports provided by the prior art Compared with the technical solution of configuring the reference signal for granularity, it is more able to adapt to complex and varied scenarios.
- the reference signal can be configured in combination with actual requirements to improve the accuracy of the channel estimation result.
- the method may further include: sending the configured first reference signal.
- the method may further include: transmitting indication information, the indication information being used to instruct the receiving end to determine configuration information of the first reference signal.
- the base station may send the indication information to the user terminal through radio resource control (radio resource control, RRC) signaling or downlink control information (English: downlink control information, abbreviated as DCI).
- RRC radio resource control
- DCI downlink control information
- the base station can indicate the configuration information of the first reference signal to the user terminal in a explicit or implicit manner, and the specific implementation process can be referred to below. This possible implementation enables the receiving end to learn the first reference signal.
- the indication information is DCI or MAC signaling, which is used to indicate configuration information of the first reference signal; before the indication information is sent, the method may further include: sending system configuration signaling; wherein, the system configuration The signaling includes RRC signaling, and the system configuration signaling includes at least one information item, and each information item records a configuration information of the first reference signal.
- the configuration information of the first reference signal may include at least one of the following information: a density of resources occupied by the first reference signal, a function carried by the first reference signal, and a first reference signal
- the density of resources occupied by the first reference signal refers to a ratio of the number of resource units occupied by the first reference signal to the number of resource units used in the transmission process.
- the function carried by the first reference signal includes at least two types.
- the density of the resources occupied by the first reference signal is considered to be the configuration information of the first reference signal.
- the density of the resource occupied by the first reference signal may not be used as the configuration information of the first reference signal, but the density of the resource occupied by the first reference signal may be used as the configuration information of the first reference signal.
- the indication information in the above possible design may include information about the density of the resource occupied by the first reference signal, such as the adjustment value of the density value or the density, and the information indicating that the receiving end determines the first reference signal. The location of the resource.
- determining the configuration information of the first reference signal may include: selecting a target pilot map from the preset pilot map set according to a current state of the user terminal; wherein the current state of the user terminal includes the following information At least one of the following: a frame structure used by the user terminal to transmit information, a scenario in which the user terminal is located, a carrier frequency used when scheduling the user terminal, and a subcarrier spacing used when the user terminal transmits information. Then, according to the target pilot map, configuration information of the first reference signal is acquired.
- the target pilot map corresponds to configuration information of the first reference signal.
- Each preset pilot map may have a correspondence relationship with configuration information of some or all of the reference signals transmitted during one transmission.
- the method may further include: sending indication information, where the indication information includes an identifier of the target pilot map.
- the optional implementation manner can be understood as: indicating the configuration information of the first reference signal by a method of implicit indication.
- the indication information includes DCI or MAC signaling for indicating a target pilot map; before transmitting the indication information, the method further includes: transmitting system configuration signaling; wherein the system configuration signaling includes an RRC letter And the system configuration signaling includes at least one information item, and each information item records information of a pilot map of the first reference signal.
- determining the configuration information of the first reference signal may include: according to the channel corresponding to the first port Determining a density of resources occupied by the first reference signal by at least one of a time-frequency characteristic, a phase noise of a channel corresponding to the first port, system information of the user terminal, system configuration information of the user terminal, and a moving speed of the user terminal;
- the first port is any port assigned to the user terminal.
- determining the configuration information of the first reference signal may include: time-frequency characteristics of the channel corresponding to the first port At least one of phase noise of a channel corresponding to the first port determines a function carried by the first reference signal.
- determining the configuration information of the first reference signal may include: determining channel quality according to the channel corresponding to the first port The information, the average peak ratio of the user terminal, and at least one of the PAPR requirement and the number of scheduling layers of the user terminal determine the transmission waveform used by the first reference signal; the first port is any port allocated for the user terminal.
- determining the configuration information of the first reference signal may include: a transmission waveform according to the first reference signal, The type of the sequence of the first reference signal is determined by at least one of a PAPR requirement of the user terminal and a scheduling flexibility requirement of the user terminal; the first port is any one of the ports assigned to the user terminal.
- determining the configuration information of the first reference signal may include: according to the time of the channel corresponding to the first reference signal A manner of generating a sequence of the first reference signal is determined by at least one of a frequency characteristic and a type of the first reference signal sequence.
- determining the configuration information of the first reference signal may include: time-frequency according to the channel corresponding to the first port The at least one of the characteristics and the phase noise superimposed on the channel corresponding to the first port determines a resource multiplexing manner of the first reference signal.
- a second aspect provides a method for configuring a reference signal, including: receiving indication information; and, according to the indication information, determining configuration information of the first reference signal; wherein the first reference signal is a first available in a transmission process
- a port corresponding to the reference signal, the port that can be used in the transmission process further includes a second port, and the configuration information of the reference signal corresponding to the second port is different from the configuration information of the first reference signal.
- the indication information may be DCI or MAC signaling or RRC signaling.
- the method may further include: receiving the first reference signal.
- the indication information includes DCI or MAC signaling for indicating configuration information of the first reference signal; before receiving the indication information, the method may further include: receiving system configuration signaling; wherein, the system configuration The signaling includes RRC signaling, and the system configuration signaling includes at least one information item, and each information item records a configuration information of the first reference signal.
- determining the configuration information of the first reference signal according to the indication information may include: acquiring the configuration of the first reference signal according to the target pilot map. information.
- the target pilot map corresponds to configuration information of the first reference signal.
- the indication information includes DCI or MAC signaling for indicating a target pilot map; before receiving the indication information, the method may further include: receiving system configuration signaling; wherein the system configuration signaling includes RRC signaling, and the system configuration signaling includes at least one information item, and each information item records information of a pilot map of the first reference signal.
- determining the configuration information of the first reference signal according to the indication information may include: occupying according to the first reference signal The density information of the resource and the preset rule determine the location information of the resource occupied by the first reference signal; the preset rule is a location information indicating a density information of the resource occupied by the first reference signal and a resource occupied by the first reference signal The rules of the correspondence.
- an apparatus for configuring a reference signal comprising: a determining unit and a configuration unit.
- the determining unit is configured to determine configuration information of the first reference signal;
- the first reference signal is a reference signal corresponding to the first port that can be used in one transmission, and the port that can be used in the transmission process further includes a second port,
- the configuration information of the reference signal corresponding to the two ports is different from the configuration information of the first reference signal.
- a configuration unit configured to configure the first reference signal according to the configuration information of the first reference signal.
- the apparatus may further include: a sending unit, configured to send indication information, where the indication information is used to instruct the receiving end to determine configuration information of the first reference signal.
- the indication information may be DCI or MAC signaling or RRC signaling.
- the sending unit may be further configured to: send the configured first reference signal.
- the indication information includes DCI or MAC signaling, which is used to indicate configuration information of the first reference signal; in this case, the sending unit may be further configured to: send system configuration signaling; wherein, the system configuration signal The RRC signaling is included in the RRC signaling, and the system configuration signaling includes at least one information item, and each information item records a configuration information of the first reference signal.
- the determining unit may be configured to: select a target pilot map from the preset pilot map set according to a current state of the user terminal; where, the current state of the user terminal includes at least one of the following information. : a frame structure used by the user terminal to transmit information, a scenario in which the user terminal is located, a carrier frequency used when scheduling the user terminal, and a subcarrier spacing used when the user terminal transmits information; and then, according to the target pilot map, obtain the first A configuration information of a reference signal.
- the apparatus may further include: a sending unit, configured to send indication information, where the indication information includes an identifier of the target pilot map.
- the target pilot map corresponds to configuration information of the first reference signal.
- the indication information includes DCI or MAC signaling for indicating a target pilot map
- the receiving unit is further configured to: receive system configuration signaling; where the system configuration signaling includes RRC signaling, and The system configuration signaling includes at least one information item, and each information item records information of a pilot map of the first reference signal.
- the determining may be specifically used to: according to the time-frequency characteristic of the channel corresponding to the first port, the first port Determining a density of resources occupied by the first reference signal by at least one of phase noise of the corresponding channel, system information of the user terminal, system configuration information of the user terminal, and moving speed of the user terminal; the first port is a user terminal Any port assigned.
- the determining unit may be configured to: correspond to the first port according to the time-frequency characteristic of the channel corresponding to the first port At least one of phase noise of the channel determines a function carried by the first reference signal.
- the determining unit may be specifically configured to: according to the channel quality information of the channel corresponding to the first port, the user terminal
- the transmission peak waveform used by the first reference signal is determined by at least one of the peak-to-peak ratio PAPR requirement and the number of scheduling layers of the user terminal; the first port is any port allocated for the user terminal.
- the determining unit may be specifically configured to: use the transmission waveform adopted by the first reference signal, and the PAPR requirement of the user terminal.
- the type of the sequence of the first reference signal is determined by at least one of the scheduling flexibility requirements of the user terminal; the first port is any one of the ports assigned to the user terminal.
- the determining unit may be specifically configured to: according to a time-frequency characteristic of the channel corresponding to the first reference signal, and the first The manner in which the sequence of the first reference signal is generated is determined by at least one of the types of reference signal sequences.
- the determining unit may be specifically configured to: according to a time-frequency characteristic of the channel corresponding to the first port, and the first port At least one of phase noise superimposed on the corresponding channel determines a resource multiplexing manner of the first reference signal.
- an apparatus for configuring a reference signal comprising a receiving unit and a determining unit.
- the receiving unit is configured to receive the indication information.
- a determining unit configured to determine, according to the indication information, configuration information of the first reference signal; wherein, the first reference signal is a reference signal corresponding to the first port that can be used in one transmission, and the port that can be used in the transmission process further includes The configuration information of the reference signal corresponding to the second port and the second port is different from the configuration information of the first reference signal.
- the indication information may be DCI or MAC signaling or RRC signaling.
- the indication information includes downlink control information DCI or media access control MAC signaling, and is used to indicate configuration information of the first reference signal.
- the receiving unit is further configured to receive system configuration signaling, where the system configuration signaling includes radio resource control RRC signaling, and the system configuration signaling includes at least one information item, where each information item records A configuration information of a reference signal.
- the indication information includes an identifier of the target pilot map
- the determining unit is specifically configured to: acquire configuration information of the first reference signal according to the target pilot map.
- the indication information includes DCI or MAC signaling for indicating the target pilot map.
- the receiving unit is further configured to: receive system configuration signaling, where the system configuration signaling includes radio resource control RRC signaling, and the system configuration signaling includes at least one information item, where each information item records Information of a pilot map of a reference signal.
- a fifth aspect provides an apparatus for configuring a reference signal, where the apparatus for configuring a reference signal can implement the functions performed in the method for configuring a reference signal provided by the foregoing first aspect, and the function can be implemented by hardware or by The hardware implements the corresponding software implementation.
- the hardware or software includes one or more modules corresponding to the above functions.
- the apparatus for configuring the reference signal includes a processor memory, a system bus, and a communication interface; the processor is configured to support the apparatus for configuring the reference signal to perform a corresponding function in the above method.
- the communication interface is used to support communication between the device that configures the reference signal and other network elements.
- the apparatus for configuring the reference signal can also include a memory for coupling with the processor that retains program instructions and data necessary for the device that configures the reference signal.
- the communication interface may specifically be a transceiver.
- an embodiment of the present invention provides a computer storage medium, and a computer software instruction corresponding to the method for storing the configuration reference signal provided by the first aspect, which includes the program designed to execute the fifth aspect. .
- a seventh aspect provides an apparatus for configuring a reference signal, where the apparatus for configuring a reference signal may implement a function performed in an example of a method for configuring a reference signal provided by the foregoing third aspect, and the function may be implemented by hardware or by The hardware implements the corresponding software implementation.
- the hardware or software includes one or more modules corresponding to the above functions.
- the structure of the apparatus for configuring the reference signal includes a processor memory, a system bus, and a communication interface; the processor is configured to support the apparatus for configuring the reference signal to perform a corresponding function in the above method.
- the communication interface is used to support communication between the device that configures the reference signal and other network elements.
- the apparatus for configuring the reference signal can also include a memory for coupling with the processor that retains program instructions and data necessary for the device that configures the reference signal.
- the communication interface may specifically be a transceiver.
- an embodiment of the present invention provides a computer storage medium, and a computer software instruction corresponding to the method for storing a configuration reference signal provided by the foregoing third aspect, which includes a program designed to execute the foregoing sixth aspect. .
- any of the devices or computer storage media configured with the reference signals provided above are used to perform the corresponding methods provided above, and therefore, the beneficial effects that can be achieved can be referred to the corresponding ones provided above.
- the beneficial effects in the method are not described here.
- FIG. 2 is a schematic structural diagram of a system to which the technical solution provided by the embodiment of the present invention is applied;
- FIG. 3 is a schematic flowchart of a method for configuring a reference signal according to an embodiment of the present disclosure
- FIG. 5 is another pilot diagram according to an embodiment of the present invention.
- FIG. 6 is a schematic flowchart diagram of another method for configuring a reference signal according to an embodiment of the present disclosure
- FIG. 7 is a schematic structural diagram of an apparatus for configuring a reference signal according to an embodiment of the present disclosure.
- FIG. 8 is a schematic structural diagram of another apparatus for configuring a reference signal according to an embodiment of the present disclosure.
- FIG. 9 is a schematic structural diagram of another apparatus for configuring a reference signal according to an embodiment of the present invention.
- the main purpose of channel estimation is to compensate for channel fading and noise, which utilizes reference signals predicted by the transmitting and receiving ends to track the time and frequency domain variations of the channel.
- the transmitting end may carry the reference signal on different resource elements (RE: resource elements, RE) in the time-frequency two-dimensional space, and send the reference signal to the receiving end.
- RE resource elements
- Each transmitting antenna (including a virtual antenna or a physical antenna) at the transmitting end has an independent data channel, that is, each port corresponds to one channel.
- the receiving end can perform channel estimation for each transmitting antenna according to the predicted reference signal.
- a long-term evolution enhancement (English: long term evolution-advanced, abbreviation: LTE-A) system defines a variety of reference signals, for example, demodulation reference signal (English: demodulation reference signal, abbreviation: DMRS), cell common reference signal ( English: cell-specific reference signal, abbreviation: CRS) and channel state information reference signal (English: channel state information reference signal, abbreviation: CSI-RS).
- the function corresponding to each reference signal is single and fixed.
- the DMRS is used for demodulation of a physical downlink shared channel (PDSCH).
- CRS is used to measure downlink channel quality for resource scheduling and support link adaptation techniques.
- the CSI-RS is used to measure the quality of a channel corresponding to a physical antenna port.
- Each reference signal has a fixed antenna port configuration.
- a reference signal corresponding to each port is usually generated according to a fixed sequence, and then a reference signal corresponding to each port is mapped on the PRB according to the number of available ports in a fixed mapping manner. Moreover, the function of the reference signal corresponding to each port in one transmission process is single and the same.
- the pilot map can be used to describe the time-frequency resource location of the reference signal corresponding to each port in the PRB during a transmission.
- each pilot map is preset, and the mapping rules and functions of the reference signals corresponding to each port in each pilot map are the same.
- the pilot map of the CSI-RS is determined by the configuration information of the CSI-RS, and each configuration information includes a time-frequency resource location mapped by the reference signal corresponding to the number of available ports in the subframe.
- FIG. 1 it is a pilot picture of a single user (English: single-user, abbreviation: SU) DMRS in the LTE standard. As can be seen from Figure 1, the number of available ports is 8.
- the resource multiplexing mode of the reference signals corresponding to ports 0, 1, 4, and 6 is code division multiplexing (abbreviation: CDM), and the reference signals corresponding to ports 0, 1, 4, and 6, and port 2,
- CDM code division multiplexing
- FDM frequency division multiplexing
- the density of the time-frequency resources occupied by the reference signals corresponding to each port is the same.
- the number of REs occupied by the reference signals corresponding to each of the ports 0 to 7 in FIG. 1 is 12.
- the reference signals corresponding to each port carry the same functions.
- the DMRS corresponding to each port in the LTE system is used to demodulate data transmitted by the corresponding port.
- the transmission waveforms used by the reference signals corresponding to each port are the same.
- the transmission waveform used by the DMRS corresponding to each port in the downlink direction is a multi-carrier generated by orthogonal frequency-division multiplexing (OFDM) technology
- the uplink direction is
- the transmission waveform used by the DMRS corresponding to each port is a single carrier generated by a single-carrier frequency-division multiple access (SC-FDMA) technique.
- SC-FDMA single-carrier frequency-division multiple access
- the sequence of the reference signals corresponding to each port is the same.
- the DMRS corresponding to each port in the downlink direction adopts a Gold sequence.
- the sequence of the reference signals corresponding to each port is generated in the same manner.
- the DMRS generation method corresponding to each port in the downlink direction is a full bandwidth generation mode.
- the DMRS generation method corresponding to each port in the uplink direction is generally a ZC (English: zadoff-chu) sequence.
- the resource multiplexing mode adopted by the reference signals corresponding to each port is the same.
- the DMRS corresponding to each port uses the FDM+CDM method for resource multiplexing.
- the above technical solution can be understood as configuring the reference signal with the available port number as the granularity.
- an embodiment of the present invention provides a method and a device for configuring a reference signal.
- the basic principle is that the configuration information of the reference signals corresponding to different ports may be different in a single transmission process, that is, the transmitting end may be in the port granularity.
- Configure the reference signal In an optional embodiment, the transmitting end may configure configuration information of the reference signal corresponding to each port in real time or semi-statically. In another optional embodiment, the transmitting end may further configure the reference signal by using the user terminal as the granularity. Specifically, the transmitting end selects the target pilot map from the preset pilot map set according to the current state of the user terminal. The configuration information corresponding to the target pilot map is determined by using the correspondence between each preset pilot map and the configuration information, so that the configuration information of the reference signals corresponding to each port is configured by using the target pilot map and the determined configuration information.
- the technical solutions provided by the embodiments of the present invention can be applied to various communication systems. Especially suitable for future evolution networks, such as 5G communication systems, such as 5G NR systems.
- 5G communication systems such as 5G NR systems.
- 5G NR systems such as 5G NR systems.
- 5G communication systems such as 5G NR systems
- 2G, 3G, 4G communication systems for example, LTE systems, third generation partnership projects (English: 3rd generation partnership project, abbreviation: 3GPP) related cellular systems, and the like, and other such communication systems.
- the 5G communication system may include a machine-to-machine (English: machine to machine, abbreviation: M2M) communication scenario and a macro-micro communication scenario, and these communication scenarios may include, but are not limited to, between the user terminal and the user terminal.
- Communication communication between a base station and a base station, communication between a base station and a user terminal, and the like.
- the technical solution provided by the embodiment of the present invention can be applied to any of the foregoing communication scenarios. The following is an example in which the technical solution provided by the embodiment of the present invention is applied between a base station and a user terminal.
- FIG. 2 is an example in which the system architecture includes a base station and a plurality of user terminals connected to the base station.
- a downlink reference signal is configured, for example, a base station configuration reference signal; in this case, the transmitting end may be a base station, and the receiving end may be a user terminal.
- an uplink reference signal is configured, for example, a scenario in which a user terminal configures a reference signal; in this case, the transmitting end may be a user terminal, and the receiving end may be a base station.
- the following is an example of a base station configuration reference signal.
- a transmitting end refers to a device that configures and transmits a reference signal
- a receiving end refers to a device that receives a reference signal.
- a method for configuring a reference signal may include the following steps S101 to S102:
- the base station determines configuration information of a reference signal corresponding to each port that can be used in one transmission.
- the ports that can be used in the transmission include a first port and a second port.
- the first port and the second port can be any two different ports that can be used during the transmission.
- the configuration information of the first port is different from the configuration information of the second port.
- the first port and the second port may be two ports allocated by the base station to the same user terminal, or may be two ports allocated by the base station to different user terminals.
- a transmission process can be understood as a transmission cycle.
- the time domain resource allocated in one transmission may be a transmission time interval (English: transmission time interval, abbreviation: TTI), or a symbol level short TTI, or a short TTI of a large subcarrier interval in a high frequency system. It can also be a time slot (English: slot) or a mini-slot in a 5G system. This embodiment of the present invention does not limit this.
- the time-frequency resource used in one transmission is a PRB.
- the base station can determine the configuration information of the reference signal corresponding to each port that can be used in the next transmission process every several transmission processes.
- the number of transmission processes that are separated between any two processes that determine the configuration information of the reference signal corresponding to each port that can be used in the next transmission process may be the same or different.
- the specificity can be determined according to the actual communication environment. For example, the base station may determine configuration information of a reference signal corresponding to each port that can be used in the transmission process before each transmission process.
- the reference signal in the embodiment of the present invention may include, but is not limited to, any one of the following reference signals: DMRS, CRS, and CSI-RS. Alternatively, it may be a newly defined reference signal.
- the reference signal corresponding to the first port is marked as the first reference signal
- the configuration information of the first reference signal may include, but is not limited to, at least one of the following information:
- the density of resources occupied by a reference signal refers to the ratio of the number of resource units occupied by the reference signal to the number of resource units used in one transmission of the current transmission process.
- the density of the time domain resource occupied by the reference signal that is, the number of time domain resources occupied by the reference signal and the number of time domain resources used in a transmission process of the current transmission process. ratio.
- the ratio of the frequency domain resource occupied by the reference signal that is, the ratio of the number of frequency domain resources occupied by the reference signal to the number of frequency domain resources used in one transmission process of the current transmission process.
- the ratio of the time-frequency resource occupied by the reference signal that is, the ratio of the number of time-frequency resources occupied by the reference signal to the number of time-frequency resources used in one transmission of the current transmission process.
- the density of the resources occupied by the reference signals corresponding to the same port may be the same or different.
- the functions carried by a reference signal may include, but are not limited to, at least one of the following: data demodulation, phase noise compensation, Doppler frequency offset compensation, channel estimation, beam management, and the like.
- the reference signal corresponding to the first port can carry at least two functions, so that system resource overhead can be reduced by function multiplexing.
- DMRS can be used for both data demodulation, phase noise compensation, and Doppler frequency offset compensation
- CSI-RS can be used for both channel estimation and beam management.
- the reference signals corresponding to the same port can carry the same function and can also carry different functions.
- reference signals such as DMRS, CRS, and CSI-RS are used to carry a specific function.
- the transmitting and receiving parties may not distinguish the type of the reference signal, but only the functions carried by itself.
- both DMRS and CRS can be used for data demodulation and phase noise compensation.
- the transmission waveform used by a reference signal may include single carrier or multiple carriers.
- the embodiment of the present invention does not limit the single carrier technology and the multi-carrier technology.
- the transmission waveforms used by the reference signals corresponding to the same port may be the same or different.
- the type of sequence of a reference signal may include, but is not limited to, any of the following: a ZC sequence, a Gold sequence, and a pseudo noise (English: pseudo-noise, abbreviation: PN) sequence.
- the sequence of the reference signals corresponding to the same port may be the same or different in different transmission processes.
- the manner of generating a sequence of reference signals may include, but is not limited to, a full bandwidth generation mode, a plurality of resource blocks (English: resource block, abbreviated as RB) generation mode, and a scheduling bandwidth generation mode of the user terminal.
- a full bandwidth generation mode a plurality of resource blocks (English: resource block, abbreviated as RB) generation mode
- RB resource block
- scheduling bandwidth generation mode of the user terminal a scheduling bandwidth generation mode of the user terminal.
- the sequence of the reference signals corresponding to the same port may be generated in the same manner or differently.
- the resource multiplexing manner of the first reference signal refers to a resource multiplexing manner between the first reference signal and other reference signals.
- the other reference signal may or may not include the second reference signal.
- the ports corresponding to the reference signals of resource multiplexing form one port group, and each port group may include at least two ports.
- the resource multiplexing manner of the reference signal corresponding to each port in each port group may include, but is not limited to, at least one of the following: CDM, FDM, and time division multiplexing (abbreviation: TDM).
- the resource multiplexing modes of the reference signals corresponding to the ports in the same port group may be the same or different in different transmission processes.
- the reference signal corresponding to the second port is marked as the second reference signal
- the configuration information of the first reference signal is different from the configuration information of the second reference signal, and may include, but is not limited to, at least one of the following information: a) The density of the resources occupied by the first reference signal is different from the density of the resources occupied by the second reference signal. b) The function carried by the first reference signal is different from the function carried by the second reference signal. c) The transmission waveform used by the first reference signal is different from the transmission waveform used by the second reference signal. d) The type of the sequence of the first reference signal is different from the type of the sequence of the second reference signal. e) The generation of the sequence of the first reference signal is different from the generation of the sequence of the second reference signal. f) The resource multiplexing manner of the first reference signal is different from the resource multiplexing manner of the second reference signal.
- the base station configures a reference signal corresponding to the port according to the configuration information of the reference signal corresponding to each port that can be used in the transmission process.
- the reference signal corresponding to a port may be configured, or the reference signal corresponding to the port may be configured for the first time, or the reference signal corresponding to the port may be reconfigured.
- the reconfiguration of the reference signal corresponding to the port can be understood as: adjusting the current configuration information of the reference signal corresponding to the port.
- the method may further include: the base station transmitting the configured reference signal.
- the method for configuring a reference signal provided by the embodiment of the present invention may have different configuration information of a reference signal corresponding to different ports in a single transmission process, that is, a technical solution for configuring a reference signal by using a port as a granularity, and existing
- the technical solution provided by the technology to configure the reference signal with the number of available ports as the granularity is more suitable for adapting to complex and varied scenarios.
- the reference signal can be configured in combination with actual requirements to improve the accuracy of the channel estimation result.
- the method may further include: the base station transmitting the indication information, where the indication information is used to instruct the receiving end to determine configuration information of the first reference signal.
- the indication information includes any one of the following information: DCI or medium access control (MAC) signaling or RRC signaling.
- the indication information may include configuration information of the first reference signal or an index of configuration information of the first reference signal.
- the foregoing method may further include the following steps a to b:
- the base station sends system configuration signaling, where the system configuration signaling includes at least one information item, and each information item records a configuration information of the first reference signal.
- the "configuration information" recorded in each information item may be any one of the configuration information provided above, for example, the density of resources occupied by the first reference signal, the function carried by the first reference signal, and the first reference signal Any of the transmitted waveforms and the like used.
- the same configuration information may be recorded in different information items.
- the density of the resource occupied by the first reference signal recorded in the information entry 1 is density 1
- the density of the resource occupied by the first reference signal in the information entry 2 is the density.
- Different types of configuration information may be recorded in different information items.
- the density of resources occupied by the first reference signal recorded in the information item 1 is density 1
- the transmission waveform used in the information entry 2 to record the first reference signal is transmission. Waveform 1.
- the system configuration signaling may be multiplexed with one signaling implementation in the prior art.
- one RRC signaling implementation in the prior art may be multiplexed.
- the system configuration signaling may also be a new signaling provided by the present application. This application does not limit this.
- the base station sends the indication information, where the indication information may include DCI or MAC signaling, where the indication information is used to indicate configuration information of the first reference signal.
- the configuration information may be one of the at least one configuration information configured in the foregoing step a.
- the at least one information item in step a is a total of four information items, and the density of resources occupied by one first reference signal is recorded in each information item.
- the density of the resource occupied by the first reference signal is recorded as the density 1
- the density of the resource occupied by the first reference signal recorded in the information entry 2 is the density 2
- the first is recorded in the information entry 1.
- the density of the resource occupied by the reference signal is density 3
- the density of the resource occupied by the first reference signal in the information entry 1 is the density 4.
- the base station may indicate one of the four densities through DCI or MAC signaling, and may specifically indicate the density value, or may indicate an index of the density value.
- the configuration information of the first reference signal configured by the system configuration signaling may be configuration information of the first reference signal that is available to the terminal, and the configuration information of the first reference signal configured by the indication information may be used by the terminal in the configuration process.
- the configuration information of the semi-static configuration reference signal is configured by the system configuration signaling, which can save the dynamic indication overhead; and dynamically configure the configuration information of the reference signal by using the indication information, so that channel estimation and the like can be improved based on the reference signal.
- the accuracy of the results of the operation in the process is configured by the system configuration signaling, which can save the dynamic indication overhead; and dynamically configure the configuration information of the reference signal by using the indication information, so that channel estimation and the like can be improved based on the reference signal.
- the base station determines configuration information of the first reference signal in real time or semi-statically. specific:
- the base station determines the density of the resource occupied by the first reference signal (ie, information 1) according to any of the following manners:
- Manner 1 The base station determines the density of the time-frequency resource occupied by the first reference signal according to the time-frequency characteristic of the channel corresponding to the first port.
- the base station can measure the time-frequency characteristics of the corresponding channel of the first port according to a reference signal, such as a reference signal (such as CRS, CSI-RS or DMRS, etc.) in the existing standard or a newly designed reference signal, and This determines the density of the resources occupied by the first reference signal.
- a reference signal such as CRS, CSI-RS or DMRS, etc.
- the time-frequency characteristic may include, but is not limited to, at least one of a Doppler shift and a multipath delay.
- the base station can determine the time domain density based on the Doppler shift. Alternatively, the larger the Doppler shift, the greater the determined time domain density.
- the Doppler shift is generally caused by the mobility of the user terminal (English: mobility). For example, if the Doppler shift of the channel corresponding to the first port is greater than 700 Hz (hertz), the time domain density corresponding to the first port must be at least 3 RE/subframe (ie, at least 3 REs per subframe are used for carrying Reference signal) to ensure the accuracy of channel estimation. If the Doppler shift of the channel corresponding to the first port is less than 7 Hz, the time domain density corresponding to the first port ensures 1RE/subframe to ensure channel estimation accuracy.
- the base station can determine the frequency domain density based on the maximum multipath delay. Alternatively, the larger the maximum multi-delay, the greater the density of the determined frequency domain. For example, if the maximum multipath delay of the channel corresponding to the first port is 5000 ns (nanoseconds) or more, the density of the frequency domain resources occupied by the first reference signal must be at least 3RE/PRB (ie, the total of each PRB). At least 3 REs in the frequency band are used to carry the reference signal). If the maximum multipath delay of the channel corresponding to the first port is 1000-5000 ns, the density of the frequency domain resources occupied by the first reference signal is at least 2RE/PRB. If the maximum multipath delay of the channel corresponding to the first port is 1000 ns or less, the density of the frequency domain resources occupied by the first reference signal is at least 1 RE/PRB.
- the base station can determine the density of the time-frequency resources occupied by the first reference signal by combining information such as maximum multipath delay and Doppler shift.
- Manner 2 The base station determines the time domain density according to the phase noise of the channel corresponding to the first port.
- phase noise the greater the determined time domain density. It can be understood that when the phase noise is larger, it is necessary to set a lot of reference signals in the time domain to overcome the influence of phase noise.
- Manner 3 The base station determines the density of the time-frequency resource occupied by the first reference signal according to the system information of the user terminal, where the first port is any port allocated for the user terminal.
- the base station may determine the time-frequency resource occupied by the first reference signal according to the system information corresponding to the first port, for example, an acknowledgment (English: acknowledgment: ACK) indication or an acknowledgment (English: unacknowledgement, abbreviation: NACK) indication. density.
- the system information corresponding to the first port can be understood as the system information transmitted on the first port. For example, if the number of times that the base station receives the NACK indication of the user terminal in the preset time period is greater than the preset threshold, the current time indicates that the reference signal corresponding to the port allocated to the user terminal has a lower density of time-frequency resources. Then, the base station can increase the density of the time-frequency resources occupied by the first reference signal in the subsequent transmission process.
- Manner 4 The base station determines the density of the time-frequency resource occupied by the first reference signal according to the system configuration information of the user terminal, where the first port is any port allocated to the user terminal.
- the base station can adjust the density of the time-frequency resources occupied by the first reference signal according to the system configuration information of the user terminal, for example, the frequency information or the scheduling bandwidth of the user terminal. Specifically, if the data of the user terminal is transmitted in the high frequency band, the channel corresponding to the port allocated by the user terminal is relatively flat, and the base station may downgrade the density of the time-frequency resource occupied by the first reference signal in the subsequent transmission process. If the data of the user terminal is transmitted in the low frequency band, the base station may adjust the density of the time-frequency resource occupied by the first reference signal in the subsequent transmission process.
- Manner 5 The base station determines the density of the time domain resource occupied by the first reference signal according to the moving speed of the user terminal, where the first port is any port allocated for the user terminal.
- the greater the moving speed of the user terminal the greater the density of the determined time domain resources.
- the density of the time domain resource occupied by the first reference signal may be 1 RE/subframe.
- the density of the time domain resource occupied by the first reference signal may be 2 RE/subframe.
- the density of the time domain resource occupied by the first reference signal may be 3 RE/subframe.
- the base station can determine the density of resources occupied by the first reference signal in combination with at least two of the foregoing manners 1 to 4.
- the base station may determine the density of resources occupied by the first reference signal according to the time-frequency characteristic of the channel corresponding to the first port and the system information corresponding to the first port.
- Other examples are not listed one by one. Of course, the specific implementation is not limited to this.
- the information used by the transmitting end to determine the density of the time domain resource occupied by the first reference signal may be It is measured at the transmitting end or it is not measured at the transmitting end. If it is not measured by the transmitting end, the measured execution body can feed back relevant information to the transmitting end.
- the related information may include, but is not limited to, at least one of the following: density adjustment requirement, suggested density value, value of frequency shift, value of multipath delay, value of phase noise, and the like.
- the values, for example, the value of the frequency shift, the value of the multipath delay, and the value of the phase noise may be statistical values, instantaneous values, or quantized values, and the like.
- the transmitting end may further send indication information to the receiver, where the indication information is used to enable the receiver to learn the configured reference signal.
- the location of the time-frequency resource Specifically, if the density of resources occupied by the reference signal corresponding to one port is configured for the first time, the indication information may include a density value or a position of a time-frequency resource occupied by the reference signal, for example, an index of the RE occupied by the reference signal. : index), where RE index can be the subcarrier where the RE is located, the symbol index, and the like.
- the indication information may include any one of the following information: the adjusted density value, the density adjustment direction, the density adjustment, and the adjusted reference signal. The location of the time-frequency resource, etc.
- the transmitting end and the receiving end may preset indication information (for example, density value, density adjustment direction, or density adjustment, etc.) Corresponding to the position of the time-frequency resource occupied by the reference signal, so that the receiving end can determine the position of the time-frequency resource occupied by the reference signal according to the indication information.
- indication information for example, density value, density adjustment direction, or density adjustment, etc.
- the base station may send the indication information to the user terminal by using RRC signaling or DCI.
- the base station determines, according to at least one of a time-frequency characteristic of a channel corresponding to the first port and a phase noise of a channel corresponding to the first port, a function (ie, information 2) carried by the first reference signal.
- the function carried by the first reference signal may include Doppler shift compensation.
- the function carried by the first reference signal may include phase noise compensation or the like.
- the method may further include: the transmitting end may send indication information to the receiving end, where the indication information is used to indicate a function carried by the first reference signal.
- the transmitting end may additionally carry other functions.
- the transmitting end may indicate to the receiving end an additional function added by the reference signal corresponding to the port.
- the base station determines a transmission waveform (ie, information 3) used by the first reference signal according to any one of the following ways:
- Manner 1 The base station determines a transmission waveform used by the first reference signal according to channel quality information of the channel corresponding to the first port.
- the base station may receive channel quality information of a channel corresponding to the first port that is fed back by the user terminal, for example, a signal to noise ratio (SNR) or a channel quality indication (abbreviation: CQI).
- SNR signal to noise ratio
- CQI channel quality indication
- the information is used to determine the transmission waveform used by the first reference signal. For example, if the value of the CQI is large, the transmission waveform used by the first reference signal may be a single carrier; if the value of the CQI is small, the transmission waveform used by the first reference signal may be a multi-carrier.
- the base station determines a transmission waveform used by the first reference signal according to a peak to average power ratio (abbreviation: PAPR, referred to as a peak-to-average ratio) requirement of the user terminal.
- PAPR peak to average power ratio
- the transmission waveform used by the first reference signal may be a single carrier. If the PAPR of the user terminal is greater than the preset threshold, the transmission waveform used by the first reference signal may be multiple carriers.
- the specific value of the preset threshold is not limited in the embodiment of the present invention.
- the user terminal with a lower PAPR may be a user terminal at the cell edge, because the signal to noise ratio (English: signal to noise ratio, abbreviation: SNR) of the user terminal at the cell edge is low, and the signal is transmitted with a low PAPR. , can increase the transmission power to improve the receiving efficiency.
- a user terminal with a higher PAPR may be a user terminal at the cell center.
- Manner 3 The base station determines a transmission waveform used by the first reference signal according to the scheduling layer of the user terminal.
- the transmission waveform used by the first reference signal may be a single carrier or a multiple carrier. If the number of scheduling layers of the user terminal is >1, the transmission waveform used by the first reference signal may be multi-carrier.
- the base station can determine the transmission waveform used by the first reference signal in combination with at least two of the foregoing manners 1 to 3. For example, the base station may determine the density of the resources occupied by the first reference signal according to the channel quality information of the channel corresponding to the first port and the PAPR requirement of the user terminal. Other examples are not listed one by one. Of course, the specific implementation is not limited to this.
- the method may further include: the transmitting end may send indication information to the receiving end, where the indication information is used to indicate a transmission waveform used by the first reference signal.
- the base station determines the type of the sequence of the first reference signal (ie, information 4) according to at least one of a transmission waveform adopted by the first reference signal, a PAPR requirement of the user terminal, and a scheduling flexibility requirement of the user terminal.
- the sequence of the first reference signal may be a ZC sequence. It should be noted that the sequence has the characteristics of low PAPR.
- the sequence of the first reference signal may be a ZC sequence. If the transmission waveform used by the first reference signal is multi-carrier, the sequence of the first reference signal may be a PN sequence.
- the sequence of the first reference signal may be a PN sequence.
- the method may further include: the transmitting end may send indication information to the receiving end, where the indication information is used to indicate a type of the sequence of the first reference signal.
- the base station determines a manner of generating the sequence of the first reference signal (ie, information 5) according to at least one of a time-frequency characteristic of the channel corresponding to the first reference signal and a type of the first reference signal sequence.
- the sequence of generating the first reference signal may be in a full-bandwidth generation manner. If the first reference signal sequence is a ZC sequence, the sequence of generating the first reference signal may be generated according to a scheduling bandwidth of the user terminal.
- the method may further include: the transmitting end may send the indication information to the receiving end, where the indication information is used to indicate a manner of generating the sequence of the first reference signal.
- the indication information may include an index of each of the plurality of RBs.
- the base station may determine a resource multiplexing manner (ie, information 6) of the first reference signal according to any one of the following manners:
- Manner 1 The base station determines a resource multiplexing manner of the first reference signal according to a time-frequency characteristic of the channel corresponding to the first port.
- the resource multiplexing mode of the first reference signal may be FDM or low-order CDM. If the value of the multi-transmission delay of the channel corresponding to the first port is small, if the channel frequency selection scenario is less than 500 ns, the resource multiplexing mode of the first reference signal may adopt the frequency domain CDM.
- the resource multiplexing mode of the first reference signal may adopt TDM. If the frequency shift of the channel corresponding to the first port is small, the resource multiplexing manner of the first reference signal may adopt a time domain CDM.
- port 0, 1 can use CDM in the time domain, and port 0, 1 and port 2, 3 use FDM multiplexing.
- ports 0, 2 can use CDM in the frequency domain, while ports 0, 2, and 1, 3 use TDM multiplexing to ensure that CDM performance is not affected by channel characteristics.
- TDM multiplexing to ensure that CDM performance is not affected by channel characteristics.
- Manner 2 The base station determines a resource multiplexing manner of the first reference signal according to the phase noise superimposed on the channel corresponding to the first port.
- the resource multiplexing manner of the first reference signal may be TDM; if the value of the phase noise superimposed on the channel corresponding to the first port is smaller, Then, the resource multiplexing manner of the first reference signal may adopt a time domain CDM.
- the resource multiplexing mode can also be switched by designing the multiplexing mode adjustment signaling.
- 1 bit can be used to indicate the switching between TDM and time domain CDM, and 1 bit is used to indicate the switching between FDM and frequency domain CDM.
- the resource multiplexing manner of the reference signal in the same pilot map is switched by designing a multiplexing manner to adjust signaling.
- the base station selects a target pilot map from the preset pilot map set, thereby determining configuration information of the first reference signal by using a correspondence between the target pilot map and the configuration information.
- the pilot map can reflect the position of the time-frequency resource occupied by the reference signal corresponding to all the ports in one transmission.
- the resource multiplexing manner of the reference signal corresponding to all ports in a transmission process may also be obtained.
- the S102 may include: the base station acquiring configuration information of the first reference signal according to the target pilot map.
- the method may further include the base station transmitting the indication information, the indication information including an identifier indicating the target pilot map.
- the identifier of the target pilot map may be the sequence number of the target pilot map, and the like.
- the transmitting and receiving parties may pre-agreed the pilot maps in different scenarios, and stipulate the correspondence between the configuration information of each pilot map and the reference signals corresponding to some or all ports in a single transmission process.
- the method may further include: the base station transmitting the indication information, where the indication information is used to indicate the target pilot map.
- the indication information includes any one of the following information: DCI or MAC signaling or RRC signaling.
- the indication information may include an identifier of the target pilot map or information of the target pilot map.
- the information of the pilot map may include at least one of the following information: a mapping manner of the time-frequency resource of the first reference signal, a port number corresponding to the first reference signal, and a multiplexing manner thereof, and the first reference signal Port mapping method, etc.
- the foregoing method may further include the following steps a to b:
- the base station sends system configuration signaling, where the system configuration signaling includes at least one information item, and each information item records information of a pilot map of the first reference signal.
- system configuration signaling includes at least one information item
- each information item records information of a pilot map of the first reference signal.
- the system configuration signaling may be multiplexed with one signaling implementation in the prior art.
- one RRC signaling implementation in the prior art may be multiplexed.
- the system configuration signaling may also be a new signaling provided by the present application. This application does not limit this.
- the base station sends indication information, where the indication information may include DCI or MAC signaling, where the indication information is used to indicate a target pilot map.
- the target pilot map may be a pilot map indicated by the information of the pilot map recorded in the at least one information item configured in step a above.
- At least one information item in step a is a total of four information items, and information of a possible pilot picture of the first reference signal is recorded in each information item, wherein the pilot picture 1 is recorded in the information item 1.
- the information of the pilot map 2 is recorded in the information entry 2
- the information of the pilot map 3 is recorded in the information entry 3
- the information of the pilot map 4 is recorded in the information entry 4.
- the base station may indicate one of the four pilot patterns as a target pilot map by using DCI or MAC signaling, and may specifically indicate the identifier of the pilot map.
- the pilot map of the first reference signal configured by the system configuration signaling may be a pilot map of the first reference signal that is available to the terminal, and the pilot map (ie, the target pilot map) of the first reference signal configured by the indication information may be It is the pilot map of the first reference signal used by the terminal in this configuration process.
- the pilot map of the reference signal is semi-statically configured by the system configuration signaling, which can save dynamic indication overhead; and dynamically configure the pilot map of the reference signal by using the indication information, so that channel estimation based on the reference signal can be improved.
- the manner of dividing the scenario corresponding to the preset pilot map in the embodiment of the present invention is not limited, and several examples are listed below:
- Example 1 Differentiating a scenario corresponding to a pilot map according to a frame structure used by a user terminal to transmit information.
- the frame structure may include, but is not limited to, a frame structure in which the time domain length is any one of the following information: TTI in the LTE system or short TTI in the symbol level, short TTI in the large subcarrier interval in the high frequency system, 5G system In the slot or mini-slot etc.
- a reference signal in a pilot structure corresponding to a frame structure having a long time domain has a higher time domain density and a lower frequency domain density to better measure time-varying characteristics.
- Example 2 Differentiate the scenario corresponding to the pilot map according to the scene in which the user terminal is located.
- the scenario in which the user terminal is located may include, but is not limited to, a rural scene, an urban scene, and a high-speed rail scene.
- the reference signal in the pilot map occupies a higher density of time domain resources.
- the reference signal in the pilot map occupies a lower density of time domain resources.
- Example 3 Differentiate the scenario corresponding to the pilot map according to the carrier frequency used when scheduling the user terminal.
- the carrier frequency used when scheduling the user terminal may include high frequency, low frequency, and ultra high frequency.
- the function of the reference signal may include phase noise compensation.
- Example 4 Differentiate the scenario corresponding to the pilot map according to the subcarrier spacing used when the user terminal transmits information. For example, in a scenario where the subcarrier spacing is large, the frequency domain density of the resources occupied by the reference signal is small to overcome the frequency selection.
- the configuration information of the first reference signal may be determined in combination with any of the multiple manners provided above. For example, when configuring configuration information of the first reference signal for the first time, the base station may select a target pilot map from the preset pilot map set, and then determine a first reference signal by using a correspondence between the target pilot map and the configuration information. Configuration information; subsequently, the configuration information of the first reference signal can be reconfigured in real time or semi-statically.
- a PRB can carry control signals, reference signals, and data signals.
- the specific examples below are described by taking the first time domain symbol of one PRB of the control signal and the time-frequency resource composed of the full bandwidth as an example.
- the resource multiplexing mode of the reference signal corresponding to the port 0, 1 in the time domain is CDM
- the resource multiplexing mode of the reference signal corresponding to the port 2, 3 in the time domain is CDM
- the reference signal corresponding to port 0, 1 and the resource multiplexing mode of the reference signals of ports 2 and 3 in the time domain are FDM.
- ports 0, 1, 2, and 3 are evenly distributed on the front end of the PRB, and the reference signal corresponding to each port occupies 12 REs.
- the reference signals corresponding to ports 0, 1 are continuously distributed in the time domain and occupy 7 REs; the reference signals of ports 2, 3 are distributed at regular intervals in the time domain, and occupy 3 REs.
- the base station may determine the type and generation manner of the sequence of the reference signal according to the manner provided above, and then generate a reference signal; then map the reference signal to the time-frequency resource by using the pilot map shown in FIG. 4, and Send to the user terminal.
- the user terminal can learn the configuration information of each reference signal in the pilot map as shown in FIG. 4 according to the manner provided above, thereby implementing measurement of channel information parameters and measurement and compensation of phase noise.
- the mapping manner and function of the reference signal in this embodiment can ensure low pilot consumption while suppressing phase noise.
- the resource multiplexing mode of the reference signal corresponding to port 0, 1 in the frequency domain is FDM.
- ports 0, 1 are evenly distributed on the front end of the PRB, and the reference signal corresponding to each port occupies 6 REs.
- the reference signals corresponding to ports 0, 1 are distributed in different symbols and occupy different sub-carriers, that is, the resource multiplexing mode is TDM+FDM.
- the reference signal corresponding to port 0 occupies 6 REs, and the reference signal corresponding to port 1 occupies 3 REs.
- the base station may determine the type and generation manner of the sequence of the reference signal according to the manner provided above, and then generate a reference signal; then map the reference signal to the time-frequency resource by using the pilot map shown in FIG. 5, and Send to the user terminal.
- the user terminal can learn configuration information of each reference signal in the pilot map as shown in FIG. 5 according to the manner provided above, thereby implementing measurement of fast time-varying channel information parameters.
- different reference signal irregular mapping modes can ensure channel estimation accuracy while effectively reducing pilot overhead.
- the foregoing description is directed to the configuration of the reference signal from the transmitting end.
- the embodiment of the present invention further provides a method for configuring the reference signal at the receiving end.
- the following is an example in which the receiving end is a user terminal as an example.
- FIG. 6 is a schematic flowchart of a method for configuring a reference signal according to an embodiment of the present invention.
- the method may include the following steps S201 to S202:
- S201 The user terminal receives the indication information.
- the user terminal determines, according to the indication information, configuration information of the first reference signal, where the first reference signal is a reference signal corresponding to the first port that can be used in one transmission, and the port that can be used in the transmission process further includes The configuration information of the reference signal corresponding to the second port and the second port is different from the configuration information of the first reference signal.
- the indication information includes an identifier of the target pilot map.
- the S202 may include: acquiring configuration information of the first reference signal according to the target pilot map.
- the solution provided by the embodiment of the present invention is mainly introduced from the perspectives of the transmitting end and the receiving end. It can be understood that the transmitting end and the receiving end and the like include hardware structures and/or software modules corresponding to each function in order to implement the above functions.
- the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
- the embodiment of the present invention may divide the function module by using the device for configuring the reference signal according to the foregoing method.
- each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
- the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
- FIG. 7 is a schematic structural diagram of an apparatus 7 for configuring a reference signal according to an embodiment of the present invention.
- the device 7 can include a determining unit 701 and a configuration unit 702.
- the sending unit 703 is further included.
- the functions of each of the functional modules may be inferred from the steps in the various method embodiments provided above, or may be referred to the content provided in the Summary of the Invention above.
- determination unit 701 can be used to perform the actions performed by the base station in S101 of FIG. 3, and/or other processes for supporting the techniques described herein.
- Configuration unit 702 can be used to perform the actions performed by the base station in S102 of FIG. 3, and/or other processes for supporting the techniques described herein.
- the above transmitting unit 703 may be a transmitter, which may be integrated with the receiver to form a transceiver.
- the determining unit 701 and the configuration unit 702 may be embedded in hardware or in a memory independent of the device 7 configuring the reference signal, so that the processor invokes the operations corresponding to the above respective units.
- FIG. 8 is a schematic structural diagram of an apparatus 8 for configuring a reference signal according to an embodiment of the present invention.
- the device 8 can include a receiving unit 801 and a determining unit 802.
- the functions of each of the functional modules may be inferred from the steps in the various method embodiments provided above, or may be referred to the content provided in the Summary of the Invention above.
- receiving unit 801 can be used to perform the actions performed by the base station in S201 of FIG. 6, and/or other processes for supporting the techniques described herein.
- the determining unit 802 can be used to perform the actions performed by the base station in S202 of FIG. 6, and/or other processes for supporting the techniques described herein.
- the receiving unit 801 may be a receiver, which may form a transceiver together with the transmitter.
- the determining unit 802 can be embedded in hardware or in a memory independent of the device 8 that configures the reference signal, so that the processor invokes the operations corresponding to the various units above.
- FIG. 9 is a schematic structural diagram of an apparatus 9 for configuring a reference signal according to an embodiment of the present invention.
- the apparatus 9 can include a processor 901, a memory 902, a system bus 903, and a communication interface 904.
- the processor 901, the memory 902, and the communication interface 904 are connected by a system bus 903.
- the memory 902 is used to store computer-executed instructions, and when the device 9 is running, the processor 901 executes computer-executed instructions stored by the memory 902 to cause the device 9 to perform any of the methods of configuring reference signals provided above.
- For a specific method for configuring the reference signal refer to the related descriptions in the following and the drawings, and details are not described herein again.
- the embodiment of the invention further provides a storage medium, which may include a memory 902.
- the processor 901 can be a processor or a collective name of a plurality of processing elements.
- the processor 901 can be a central processing unit (English: central processing unit, abbreviated: CPU), a general-purpose processor, a digital signal processor (English: digital signal processor, abbreviation: DSP), an application specific integrated circuit (English: application- Specific integrated circuit (abbreviation: ASIC), field programmable gate array (English: field programmable gate array, abbreviation: FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
- the processor 901 may also be a dedicated processor, which may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip having other dedicated processing functions of device 9.
- the memory 902 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 902 may also include a non-volatile memory (English: non-volatile memory) ), such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state Drive, abbreviation: SSD); the memory 902 may also include a combination of the above types of memories.
- ROM read-only memory
- flash memory English: flash memory
- HDD hard disk drive
- SSD solid state drive
- the system bus 903 can include a data bus, a power bus, a control bus, and a signal status bus. For the sake of clarity in the present embodiment, various buses are illustrated as system bus 903 in FIG.
- Communication interface 904 may specifically be a transceiver on device 9.
- the transceiver can be a wireless transceiver.
- the wireless transceiver can be an antenna or the like of the device 9.
- the processor 901 transmits and receives data to and from other devices, such as the base station, via the communication interface 904.
- each step in the method flow for obtaining a reference signal provided in the above may be implemented by the processor 901 in hardware form executing a computer-executed instruction in the form of software stored in the memory 902. To avoid repetition, we will not repeat them here.
- the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
- the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
- Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
- a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.
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Abstract
Description
Claims (45)
- 一种配置参考信号的方法,其特征在于,所述方法包括:确定第一参考信号的配置信息;所述第一参考信号是一次传输过程中可使用的第一端口对应的参考信号,所述传输过程中可使用的端口还包括第二端口,所述第二端口对应的参考信号的配置信息与所述第一参考信号的配置信息不同;根据所述第一参考信号的配置信息,配置所述第一参考信号。
- 根据权利要求1所述的方法,其特征在于,所述第一参考信号的配置信息包括以下信息中的至少一种:所述第一参考信号所占的资源的密度,其中,所述第一参考信号所占的资源的密度是指所述第一参考信号所占的资源单元的个数与所述传输过程中所使用的资源单元的个数的比值;所述第一参考信号所承载的功能;所述第一参考信号所采用的传输波形;所述第一参考信号的序列的类型;所述第一参考信号的序列的生成方式;所述第一参考信号的资源复用方式。
- 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:发送指示信息,所述指示信息用于指示接收端确定所述第一参考信号的配置信息。
- 根据权利要求1或2所述的方法,其特征在于,所述确定第一参考信号的配置信息,包括:根据用户终端的当前状态从预设导频图集合中选择目标导频图;其中,所述用户终端的当前状态包括以下信息中的至少一种:所述用户终端传输信息所采用的帧结构,所述用户终端所处的场景,调度所述用户终端时所使用的载频,所述用户终端传输信息时所采用的子载波间隔;根据所述目标导频图,获取所述第一参考信号的配置信息。
- 根据权利要求4所述的方法,其特征在于,所述方法还包括:发送指示信息,所述指示信息包括所述目标导频图的标识。
- 根据权利要求4或5所述的方法,其特征在于,所述目标导频图与所述第一参考信号的配置信息对应。
- 根据权利要求1至3任一项所述的方法,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所占的资源的密度;所述确定第一参考信号的配置信息,包括:根据所述第一端口对应的信道的时频特性、所述第一端口对应的信道的相位噪声、用户终端的系统信息、用户终端的系统配置信息和所述用户终端的移动速度中的至少一种,确定所述第一参考信号所占的资源的密度;所述第一端口是为所述用户终端分配的任一端口。
- 根据权利要求1至3任一项所述的方法,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所承载的功能;所述确定第一参考信号的配置信息,包括:根据所述第一端口对应的信道的时频特性和所述第一端口对应的信道的相位噪声中的至少一种,确定所述第一参考信号所承载的功能。
- 根据权利要求1至3任一项所述的方法,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所采用的传输波形;所述确定第一参考信号的配置信息,包括:根据所述第一端口对应的信道的信道质量信息、用户终端的均峰比PAPR需求和用户终端的调度层数中的至少一种,确定所述第一参考信号所采用的传输波形;所述第一端口是为所述用户终端分配的任一端口。
- 根据权利要求1至3任一项所述的方法,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号的序列的类型;所述确定第一参考信号的配置信息,包括:根据所述第一参考信号所采用的传输波形、用户终端的PAPR需求和用户终端的调度灵活性需求中的至少一种,确定所述第一参考信号的序列的类型;所述第一端口是为所述用户终端分配的端口中的任一端口。
- 根据权利要求1至3任一项所述的方法,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号的资源复用方式;所述确定第一参考信号的配置信息,包括:根据所述第一端口对应的信道的时频特性和所述第一端口对应的信道上所叠加的相位噪声中的至少一种,确定所述第一参考信号的资源复用方式。
- 根据权利要求3所述的方法,其特征在于,所述指示信息包括下行控制信息DCI或媒体接入控制MAC信令,用于指示所述第一参考信号的配置信息;在所述发送指示信息之前,所述方法还包括:发送系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一配置信息。
- 根据权利要求5所述的方法,其特征在于,所述指示信息包括DCI或MAC信令,用于指示所述目标导频图;在所述发送指示信息之前,所述方法还包括:发送系统配置信令;其中,所述系统配置信令包括RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一导频图的信息。
- 根据权利要求3或5所述的方法,其特征在于,所述指示信息包括以下其中一种:DCI或MAC信令或RRC信令。
- 一种配置参考信号的方法,其特征在于,所述方法包括:接收指示信息;根据所述指示信息,确定第一参考信号的配置信息;其中,所述第一参考信号是一次传输过程中可使用的第一端口对应的参考信号,所述传输过程中可使用的端口还包括第二端口,所述第二端口对应的参考信号的配置信息与所述第一参考信号的配置信息不同。
- 根据权利要求15所述的方法,其特征在于,所述第一参考信号的配置信息包 括以下信息中的至少一种:所述第一参考信号所占的资源的密度,其中,所述第一参考信号所占的资源的密度是指所述第一参考信号所占的资源单元的个数与所述传输过程中所使用的资源单元的个数的比值;所述第一参考信号所承载的功能;所述第一参考信号所采用的传输波形;所述第一参考信号的序列的类型;所述第一参考信号的序列的生成方式;所述第一参考信号的资源复用方式。
- 根据权利要求15或16所述的方法,其特征在于,所述指示信息中包括目标导频图的标识;所述根据所述指示信息,确定第一参考信号的配置信息,包括:根据所述目标导频图,获取所述第一参考信号的配置信息。
- 根据权利要求17所述的方法,其特征在于,所述目标导频图与所述第一参考信号的配置信息对应。
- 根据权利要求15或16所述的方法,其特征在于,所述指示信息包括下行控制信息DCI或媒体接入控制MAC信令,用于指示所述第一参考信号的配置信息;在所述接收指示信息之前,所述方法还包括:接收系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一配置信息。
- 根据权利要求17或18所述的方法,其特征在于,所述指示信息包括DCI或MAC信令,用于指示所述目标导频图;在所述接收指示信息之前,所述方法还包括:接收系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一导频图的信息。
- 根据权利要求15至18任一项所述的方法,其特征在于,所述指示信息包括以下其中一种:DCI或MAC信令或RRC信令。
- 一种配置参考信号的装置,其特征在于,所述装置包括:确定单元,用于确定第一参考信号的配置信息;所述第一参考信号是一次传输过程中可使用的第一端口对应的参考信号,所述传输过程中可使用的端口还包括第二端口,所述第二端口对应的参考信号的配置信息与所述第一参考信号的配置信息不同;配置单元,用于根据所述第一参考信号的配置信息,配置所述第一参考信号。
- 根据权利要求22所述的装置,其特征在于,所述第一参考信号的配置信息包括以下信息中的至少一种:所述第一参考信号所占的资源的密度,其中,所述第一参考信号所占的资源的密度是指所述第一参考信号所占的资源单元的个数与所述传输过程中所使用的资源单元的个数的比值;所述第一参考信号所承载的功能;所述第一参考信号所采用的传输波形;所述第一参考信号的序列的类型;所述第一参考信号的序列的生成方式;所述第一参考信号的资源复用方式。
- 根据权利要求22或23所述的装置,其特征在于,所述装置还包括:发送单元,用于发送指示信息,所述指示信息用于指示接收端确定所述第一参考信号的配置信息。
- 根据权利要求22或23所述的装置,其特征在于,所述确定单元具体用于:根据用户终端的当前状态从预设导频图集合中选择目标导频图;其中,所述用户终端的当前状态包括以下信息中的至少一种:所述用户终端传输信息所采用的帧结构,所述用户终端所处的场景,调度所述用户终端时所使用的载频,所述用户终端传输信息时所采用的子载波间隔;根据所述目标导频图,获取所述第一参考信号的配置信息。
- 根据权利要求25所述的装置,其特征在于,所述装置还包括:发送单元,用于发送指示信息,所述指示信息包括所述目标导频图的标识。
- 根据权利要求25或26所述的装置,其特征在于,所述目标导频图与所述第一参考信号的配置信息对应。
- 根据权利要求22至25任一项所述的装置,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所占的资源的密度;所述确定具体用于:根据所述第一端口对应的信道的时频特性、所述第一端口对应的信道的相位噪声、用户终端的系统信息、用户终端的系统配置信息和所述用户终端的移动速度中的至少一种,确定所述第一参考信号所占的资源的密度;所述第一端口是为所述用户终端分配的任一端口。
- 根据权利要求22至25任一项所述的装置,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所承载的功能;所述确定单元具体用于:根据所述第一端口对应的信道的时频特性和所述第一端口对应的信道的相位噪声中的至少一种,确定所述第一参考信号所承载的功能。
- 根据权利要求22至25任一项所述的装置,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号所采用的传输波形;所述确定单元具体用于:根据所述第一端口对应的信道的信道质量信息、用户终端的均峰比PAPR需求和用户终端的调度层数中的至少一种,确定所述第一参考信号所采用的传输波形;所述第一端口是为所述用户终端分配的任一端口。
- 根据权利要求22至25任一项所述的装置,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号的序列的类型;所述确定单元具体用于:根据所述第一参考信号所采用的传输波形、用户终端的PAPR需求和用户终端的调度灵活性需求中的至少一种,确定所述第一参考信号的序列的类型;所述第一端口是为所述用户终端分配的端口中的任一端口。
- 根据权利要求22至25任一项所述的装置,其特征在于,如果所述第一参考信号的配置信息包括所述第一参考信号的资源复用方式;所述确定单元具体用于:根据所述第一端口对应的信道的时频特性和所述第一端口对应的信道上所叠加的 相位噪声中的至少一种,确定所述第一参考信号的资源复用方式。
- 根据权利要求24所述的装置,其特征在于,所述指示信息包括下行控制信息DCI或媒体接入控制MAC信令,用于指示所述第一参考信号的配置信息;所述发送单元还用于:发送系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一配置信息。
- 根据权利要求26所述的装置,其特征在于,所述指示信息包括DCI或MAC信令,用于指示所述目标导频图;所述发送单元还用于:发送系统配置信令;其中,所述系统配置信令包括RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一导频图的信息。
- 根据权利要求24或26所述的装置,其特征在于,所述指示信息包括以下其中一种:DCI或MAC信令或RRC信令。
- 一种配置参考信号的装置,其特征在于,所述装置包括:接收单元,用于接收指示信息;确定单元,用于根据所述指示信息,确定第一参考信号的配置信息;其中,所述第一参考信号是一次传输过程中可使用的第一端口对应的参考信号,所述传输过程中可使用的端口还包括第二端口,所述第二端口对应的参考信号的配置信息与所述第一参考信号的配置信息不同。
- 根据权利要求36所述的装置,其特征在于,所述第一参考信号的配置信息包括以下信息中的至少一种:所述第一参考信号所占的资源的密度,其中,所述第一参考信号所占的资源的密度是指所述第一参考信号所占的资源单元的个数与所述传输过程中所使用的资源单元的个数的比值;所述第一参考信号所承载的功能;所述第一参考信号所采用的传输波形;所述第一参考信号的序列的类型;所述第一参考信号的序列的生成方式;所述第一参考信号的资源复用方式。
- 根据权利要求36或37所述的装置,其特征在于,所述指示信息中包括目标导频图的标识;所述确定单元具体用于:根据所述目标导频图,获取所述第一参考信号的配置信息。
- 根据权利要求38所述的装置,其特征在于,所述目标导频图与所述第一参考信号的配置信息对应。
- 根据权利要求36或37所述的装置,其特征在于,所述指示信息包括下行控制信息DCI或媒体接入控制MAC信令,用于指示所述第一参考信号的配置信息;所述接收单元还用于:接收系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一配置信息。
- 根据权利要求38或39所述的装置,其特征在于,所述指示信息包括DCI或MAC信令,用于指示所述目标导频图;所述接收单元还用于:接收系统配置信令;其中,所述系统配置信令包括无线资源控制RRC信令,且所述系统配置信令中包含至少一条信息条目,每一信息条目中记录有所述第一参考信号的一导频图的信息。
- 根据权利要求36至39任一项所述的装置,其特征在于,所述指示信息包括以下其中一种:DCI或MAC信令或RRC信令。
- 根据权利要求1至21任一项所述的方法,或权利要求22至42任一项所述的装置,其特征在于,所述第一参考信号和所述第二端口对应的参考信号均是解调参考信号DMRS,或者,所述第一参考信号和所述第二端口对应的参考信号均是信道状态信息参考信号CSI-RS。
- 一种配置参考信号的装置,其特征在于,所述装置包括:存储器和处理器,其中,所述存储器用于存储计算机程序,所述计算机程序被所述处理器执行时,使得如权利要求1至21任一项所述的方法,或权利要求43所述的方法被执行。
- 一种计算机存储介质,其上存储有计算机程序,其特征在于,所述计算机程序在计算机上运行时,使得如权利要求1至21任一项所述的方法,或权利要求43所述的方法被执行。
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EP17890767.1A EP3562081A4 (en) | 2017-01-06 | 2017-12-28 | METHOD AND DEVICE FOR CONFIGURING A REFERENCE SIGNAL |
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