WO2024022498A1 - 信道估计方法、装置及设备 - Google Patents

信道估计方法、装置及设备 Download PDF

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Publication number
WO2024022498A1
WO2024022498A1 PCT/CN2023/109872 CN2023109872W WO2024022498A1 WO 2024022498 A1 WO2024022498 A1 WO 2024022498A1 CN 2023109872 W CN2023109872 W CN 2023109872W WO 2024022498 A1 WO2024022498 A1 WO 2024022498A1
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Prior art keywords
pdcch
resource
resource units
channel estimation
symbol
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PCT/CN2023/109872
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English (en)
French (fr)
Inventor
张仲丹
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北京紫光展锐通信技术有限公司
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Publication of WO2024022498A1 publication Critical patent/WO2024022498A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present application relates to the field of communication technology, and in particular, to a channel estimation method, apparatus and equipment.
  • DSS Dynamic spectrum sharing
  • LTE longterm evolution
  • NR new radio
  • the NR physical downlink control channel (PDCCH) demodulation reference signal (Demodultion Reference Signal, DMRS) can share the same spectrum with the LTE cell-specific reference signal (Cell-specific Reference Signal, CRS).
  • PDCCH physical downlink control channel
  • DMRS Demodulation Reference Signal
  • This application provides a channel estimation method, device and equipment, which reduces the channel estimation complexity of terminal equipment.
  • this application provides a channel estimation method, including:
  • Receive first indication information the first indication information being used to indicate the physical downlink control channel PDCCH demodulation reference signal DMRS resource mapping type
  • N resource units are determined, the N resource units are the resource units to which the PDCCH DMRS is mapped, and the N is a positive integer greater than or equal to 1;
  • channel estimation is performed on the new air interface NR PDCCH.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • K resource units overlap with the resource units to which the long-term evolution LTE cell-specific reference signal CRS is mapped; the K is a positive integer.
  • the channel estimation of the NR PDCCH based on the signals received on the N resource units includes:
  • Channel estimation is performed on the NR PDCCH according to the PDCCH DMRS received on the M resource units corresponding to the second symbol.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • the N resource units correspond to the second symbols
  • the resource units corresponding to the first symbols include resource units to which LTE CRS is mapped.
  • the resource unit corresponding to the second symbol does not include the resource unit to which the LTE CRS is mapped.
  • the method further includes:
  • Receive second indication information where the second indication information is used to indicate a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with the resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • this application provides a channel estimation method, including:
  • the first indication information is used to indicate the PDCCH DMRS resource mapping type; the PDCCH DMRS resource mapping type is used to determine the resource unit to which the PDCCH DMRS is mapped.
  • the method further includes:
  • Send second indication information where the second indication information is used to indicate resource units used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with the resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • this application provides a channel estimation device, including: a receiving module, a determining module and an estimating module, wherein,
  • the receiving module is configured to receive first indication information, where the first indication information is used to indicate the PDCCH DMRS resource mapping type;
  • the determination module is configured to determine N resource units according to the PDCCH DMRS resource mapping type, the N resource units are resource units to which the PDCCH DMRS is mapped, and the N is a positive integer greater than or equal to 1;
  • the receiving module is also configured to receive signals on the N resource units;
  • the estimation module is configured to perform channel estimation on the NR PDCCH according to the signals received on the N resource units.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • K resource units among the M resource units corresponding to the first symbol overlap with resource units mapped to the LTE CRS; the K is a positive integer.
  • the estimation module is specifically used to:
  • Channel estimation is performed on the NR PDCCH according to the PDCCH DMRS received on the M resource units corresponding to the second symbol.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • the N resource units correspond to the second symbols, and the resource units corresponding to the first symbols include resource units to which LTE CRS is mapped.
  • the resource unit corresponding to the second symbol does not include the resource unit to which the LTE CRS is mapped.
  • the receiving module is specifically used to:
  • Receive second indication information where the second indication information is used to indicate a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • this application provides a channel estimation device, including: a determining module and a sending module, wherein,
  • the determination module is used to determine the resource mapping type of PDCCH DMRS
  • the sending module is configured to send first indication information to the terminal device, the first indication information is used to indicate the PDCCH DMRS resource mapping type; the PDCCH DMRS resource mapping type is used to determine the resource unit to which the PDCCH DMRS is mapped.
  • the sending module is specifically used to:
  • Send second indication information where the second indication information is used to indicate resource units used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • this application provides a channel estimation device, including: a processor, and a memory communicatively connected to the processor;
  • the memory stores a computer program
  • the processor executes the computer program to implement the method according to any one of the first aspects.
  • this application provides a channel estimation device, including: a processor, and a memory communicatively connected to the processor;
  • the memory stores a computer program
  • the processor executes the computer program to implement the method according to any one of the second aspects.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program is executed by a computer, the method as described in any one of the first aspects is implemented.
  • the present application provides a computer-readable storage medium.
  • a computer program is stored in the computer-readable storage medium.
  • the implementation of the second aspect is implemented. any of the methods described.
  • the present application provides a computer program product, including a computer program that implements the method according to any one of the first aspects when executed by a computer.
  • the present application provides a computer program product, including a computer program that implements the method described in any one of the second aspects when executed by a computer.
  • the present application provides a chip.
  • a computer program is stored on the chip.
  • the method as described in any one of the first aspects is implemented.
  • the chip can also be a chip module.
  • the present application provides a chip, a computer program is stored on the chip, and when the computer program is executed by the chip, the method as described in any one of the second aspects is implemented.
  • the chip can also be a chip module.
  • the terminal equipment can determine the N resource units corresponding to the PDCCH DMRS resource mapping type according to the PDCCH DMRS resource mapping type indicated by the first indication information, and can determine the N resource units according to the N resources
  • the PDCCH DMRS received on the unit performs channel estimation on the NR PDCCH. That is to say, the terminal device can determine the channel estimation method through the first indication information, thereby reducing the channel estimation complexity of the terminal device.
  • FIG. 1 is a schematic diagram of LTE CRS resource mapping provided by an embodiment of this application.
  • Figure 2 is a schematic diagram of LTE and NR dynamic spectrum sharing provided by an embodiment of the present application
  • Figure 3 is a schematic diagram of NR PDCCH DMRS resource mapping provided by the embodiment of the present application.
  • Figure 4 is a schematic diagram of NR PDCCH DMRS resource mapping based on DSS technology
  • Figure 5 is a schematic diagram of another NR PDCCH DMRS resource mapping based on DSS technology
  • Figure 6 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Figure 7 is a schematic flow chart of a channel estimation method provided by an embodiment of the present application.
  • Figure 8 is a schematic flow chart of another channel estimation method provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of a resource mapping type provided by an embodiment of the present application.
  • Figure 10 is a schematic flow chart of another channel estimation method provided by an embodiment of the present application.
  • Figure 11 is another NR PDCCH DMRS resource mapping diagram based on DSS technology
  • Figure 12 is another NR PDCCH DMRS resource mapping diagram based on DSS technology
  • Figure 13 is a schematic structural diagram of a channel estimation device provided by an embodiment of the present application.
  • Figure 14 is a schematic structural diagram of another channel estimation device provided by an embodiment of the present application.
  • Figure 15 is a schematic diagram of the hardware structure of a channel estimation device provided by this application.
  • Figure 16 is a schematic diagram of the hardware structure of another channel estimation device provided by this application.
  • This application relates to communication technology. To facilitate understanding of the embodiments of this application, the relevant communication technology involved in this application is first described in detail.
  • FIG 1 is a schematic diagram of LTE CRS resource mapping provided by an embodiment of the present application. Please refer to Figure 1.
  • Each CRS occupies a resource element (Resource element, RE).
  • RE resource element
  • CRS is sent in every downlink subframe and every resource block (RB) within the entire downlink bandwidth.
  • the starting position of the CRS within each RB is related to the cell-specific frequency shift.
  • a cell can use 1 CRS, 2 CRS or 4 CRS.
  • one antenna port can be used (for example, antenna port 0); when the LTE cell uses two CRS, two antenna ports can be used (for example, antenna port 0 and antenna port 1);
  • 4 antenna ports can be used (for example, antenna port 0, antenna port port 1, antenna port 2 and antenna port 3).
  • the CRS When a cell uses 1 CRS, the CRS will be inserted into the first Orthogonal Frequency Division Multiplexing (OFDM) symbol and the third to last OFDM symbol of each time slot. Two adjacent CRSs in the same OFDM symbol are separated by 6 subcarriers in the frequency domain. At the same time, the CRS in the penultimate OFDM symbol and the CRS in the first OFDM symbol are separated by 3 subcarriers in the frequency domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the CRS on the first antenna port (antenna port 0) and the CRS on the second antenna port (antenna port 1) are multiplexed in the frequency domain, and the two are offset by 3 in the frequency domain. subcarrier.
  • the CRS on the third antenna port (antenna port 2) and the reference signal on the fourth antenna port (antenna port 3) are multiplexed in the frequency domain, and the two are biased in the frequency domain. Moved 3 subcarriers.
  • CRS on the 3rd and 4th antenna ports is transmitted on the 2nd OFDM symbol of each slot. In this way, the 3rd and 4th antenna ports are multiplexed in the time domain with the reference signals on the 1st and 2nd antenna ports.
  • DSS refers to the technology in which NR and LTE dynamically share the same spectrum.
  • Figure 2 is a schematic diagram of LTE and NR dynamic spectrum sharing provided by an embodiment of the present application. See Figure 2, LTE and NR dynamically share a frequency band.
  • DSS supports instantaneous sharing with a 1ms period, that is, coordinated scheduling of spectrum resources is performed every 1ms.
  • DSS supports dynamic sharing with a granularity of 1 RB, and performs dynamic resource allocation according to the traffic requirements of the LTE side and NR side.
  • Figure 3 is a schematic diagram of PDCCH DMRS resource mapping provided by an embodiment of the present application.
  • the basic unit of PDCCH resource allocation can be a resource element group (Resource Element Group, REG).
  • REG can be defined by one OFDM symbol in the time domain and 12 subcarriers (ie, 1 RB) in the frequency domain.
  • PDCCH DMRS can also be called NR PDCCH DMRS, which is the reference signal used to demodulate NR PDCCH.
  • NR PDCCH DMRS is the reference signal used to demodulate NR PDCCH.
  • the three REs used to map PDCCH DMRS are evenly distributed in each REG to which the NR PDCCH is mapped.
  • the three REs can be REs corresponding to subcarrier 1, subcarrier 5, and subcarrier 9 in the REG.
  • Figure 4 is a schematic diagram of NR PDCCH DMRS resource mapping based on DSS technology. Please refer to Figure 4.
  • the frequency domain locations of LTE CRS are subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9.
  • NR PDCCH is transmitted on symbol 1 and symbol 2.
  • LTE CRS can be transmitted on symbol 1 at the same time.
  • network equipment can knock down NR PDCCH and PDCCH DMRS.
  • the network device can remove the NR PDCCH and PDCCH DMRS on the overlapping RE.
  • PDCCH DMRS is transmitted on subcarrier 1 and subcarrier 5 of symbol 1; PDCCH DMRS and LTE CRS overlap on subcarrier 9, and the network equipment knocks out the PDCCH DMRS; on subcarrier 0, subcarrier 3 and subcarrier 6, NR PDCCH and LTE CRS overlaps, and the network equipment knocks out the NR PDCCH.
  • Symbol 2 is not used to transmit LTE CRS.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2 are used to transmit PDCCH DMRS.
  • NR PDCCH is transmitted on the remaining subcarriers of symbol 2.
  • Figure 5 is a schematic diagram of another NR PDCCH DMRS resource mapping based on DSS technology. Please refer to Figure 5.
  • the frequency domain locations of LTE CRS are subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9.
  • NR PDCCH is transmitted on symbol 1 and symbol 2.
  • LTE CRS can be transmitted on symbol 1 at the same time.
  • network equipment On symbols with LTE CRS, network equipment only transmits NR PDCCH and does not transmit PDCCH DMRS.
  • network equipment On REs with LTE CRS, network equipment can knock down NR PDCCH. For example, NR PDCCH and LTE CRS overlap on subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9 of symbol 1, and the network equipment knocks out the NR PDCCH; NR PDCCH is transmitted on the remaining subcarriers of symbol 1.
  • Symbol 2 is not used to transmit LTE CRS.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2 are used to transmit PDCCH DMRS.
  • NR PDCCH is transmitted on the remaining subcarriers of symbol 2.
  • Figure 6 is a schematic diagram of a communication system architecture provided by an embodiment of the present application. Please refer to Figure 6.
  • the communication system includes: network equipment and terminal equipment.
  • the network equipment can be a next generation base station (next generation node B, gNB), and the network equipment supports DSS technology between NR and LTE.
  • next generation base station next generation node B, gNB
  • Terminal devices can communicate with network devices based on NR.
  • the end device can receive network device NR PDCCH is prepared to be sent, and NR PDCCH channel estimation can be performed through PDCCH DMRS.
  • NR PDCCH is prepared to be sent
  • NR PDCCH channel estimation can be performed through PDCCH DMRS.
  • the number of terminal devices may be one or more, which is not limited in the embodiments of the present application.
  • terminal equipment can perform channel estimation in at least the following three ways:
  • Method 1 The terminal equipment uses PDCCH DMRS on all symbols mapped to NR PDCCH for channel estimation.
  • Method 2 The terminal equipment uses PDCCH DMRS that is mapped only on the symbols of NR PDCCH and PDCCH DMRS for channel estimation, that is, it uses PDCCH DMRS that is not mapped on the RE corresponding to the symbol of LTE CRS for channel estimation.
  • Method 3 For symbols with LTE CRS, the terminal equipment uses the PDCCH DMRS on the useful RE for channel estimation; for symbols that only map NR PDCCH and PDCCH DMRS, the terminal equipment uses the PDCCH DMRS on the symbol for channel estimation.
  • the useful REs here can be understood as: REs occupied by PDCCH DMRS and do not overlap or collide with REs occupied by LTE CRS.
  • the terminal equipment When the terminal equipment performs channel estimation for NR PDCCH, it needs to perform different PDCCH DMRS processing according to different LTE CRS resource mapping forms. For example, the terminal equipment needs to determine the location of the LTE CRS based on the frequency offset of the LTE CRS, the number of antenna ports, bandwidth, and carrier frequency. The channel estimation complexity of terminal equipment is relatively high.
  • embodiments of the present application send indication information to the terminal device through the network device, so that the terminal device can determine the channel estimation method according to the indication information, thereby reducing the channel estimation complexity of the terminal device.
  • Figure 7 is a schematic flowchart of a channel estimation method provided by an embodiment of the present application. As shown in Figure 7, the method in this embodiment includes:
  • the network device determines the resource mapping type of PDCCH DMRS.
  • the network device may be a gNB in a fifth generation mobile communication technology (5th generation, 5G) NR system.
  • 5th generation, 5G fifth generation mobile communication technology
  • PDCCH DMRS is the reference signal for demodulating NR PDCCH, and PDCCH DMRS can be used for channel estimation of NR PDCCH.
  • PDCCH DMRS resource mapping may be allocation of PDCCH DMRS transmission resources performed by the network device.
  • the PDCCH DMRS resource mapping type can also be called PDCCH DMRS resource mapping method, etc.
  • the PDCCH DMRS resource mapping type is used to indicate the mapping situation of the PDCCH DMRS in the resource unit corresponding to the symbol where the LTE CRS is located.
  • the PDCCH DMRS resource mapping method can be used to indicate that the PDCCH DMRS is not mapped on the resource unit corresponding to the symbol where the LTE CRS is located.
  • the PDCCH DMRS resource mapping method can be used to indicate that the PDCCH DMRS is mapped on the resource unit corresponding to the symbol where the LTE CRS is located.
  • the network device can determine a PDCCH DMRS resource mapping method based on information such as available resources in the time-frequency domain.
  • the network device sends the first instruction information to the terminal device.
  • the terminal device receives the first indication information from the network device.
  • the terminal device may be an electronic device supporting the NR network standard.
  • the terminal device may be a vehicle, a vehicle-mounted terminal or a vehicle-mounted device that supports the NR network standard, or it may be a user terminal, a mobile device or an edge device, or it may be a roadside device, etc.
  • the first indication information is used to indicate the PDCCH DMRS resource mapping type.
  • the first indication information includes but is not limited to system information broadcast (System Information Block, SIB), terminal equipment specific (UE-specific) signaling or other system messages.
  • SIB System Information Block
  • UE-specific terminal equipment specific
  • the embodiment of the present application does not limit the specific form of the first indication information.
  • the terminal device specific signaling may be PDCCH configuration (PDCCH-config) signaling.
  • the first indication information may also be used to indicate the channel estimation method.
  • the network device can determine the channel estimation method according to the PDCCH DMRS resource mapping type, and send the channel estimation method to the terminal device through the first indication information.
  • the channel estimation method can be through PDCCH on all symbols mapped to NR PDCCH DMRS performs channel estimation; alternatively, the channel estimation method may be to perform channel estimation through PDCCH DMRS on symbols that are not mapped to LTE CRS.
  • the first indication information may include a value of a preset bit.
  • the value of the preset bit may be the first value or the second value.
  • the channel estimation method may be channel estimation through PDCCH DMRS on all symbols mapped to the NR PDCCH; the value of the preset bit When is the second value (for example, the second value may be 1), the channel estimation method may be to perform channel estimation through PDCCH DMRS on symbols that do not map LTE CRS. or,
  • the first indication information may include the status of the preset parameter.
  • the status of the preset parameters can be enabled (enabled) or disabled (disenabled).
  • the channel estimation method can be, channel estimation is performed through PDCCH DMRS on the symbols that do not map LTE CRS; when the status of the preset parameter is disabled, the channel estimation method can be, through all mappings
  • the PDCCH DMRS on the NR PDCCH symbols performs channel estimation.
  • the PDCCH DMRS resource mapping type is associated with the resource unit used for channel estimation in the resource unit to which the PDCCH DMRS is mapped.
  • the resource unit may be a basic resource unit for transmitting PDCCH DMRS.
  • the resource unit may be RE.
  • communication between terminal devices and network devices can be performed at the granularity of resource units.
  • the network device may send PDCCH DMRS on one or more resource units.
  • the terminal device may receive PDCCH DMRS on one or more resource units.
  • any PDCCH DMRS resource mapping type when the network device adopts this resource mapping type, the terminal equipment can use the PDCCH DMRS and LTE CRS transmitted on all resource units to which the PDCCH DMRS is mapped to perform channel estimation, or, the terminal The device can use the PDCCH DMRS transmitted on some resource units to which the PDCCH DMRS is mapped to perform channel estimation.
  • any PDCCH DMRS resource mapping type can correspond to one or more channel estimation methods.
  • the network device may also send the second indication information to the terminal device.
  • the second indication information is used to indicate the resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the second indication information includes but is not limited to system information broadcast or other system messages.
  • the embodiment of the present application does not limit the specific form of the second indication information.
  • the network device can use the PDCCH DMRS resource mapping situation and the LTE
  • the interference situation of CRS to NR PDCCH/PDCCH DMRS instructs the terminal equipment to perform channel estimation based on the PDCCH DMRS received on the specified symbol or symbols.
  • the network device can use the second indication information to instruct the terminal device to use PDCCH DMRS on all symbols mapped to NR PDCCH for channel estimation; LTE CRS does not interfere with NR PDCCH/PDCCH DMRS
  • the network device can instruct the terminal device to use the PDCCH DMRS that only maps NR PDCCH and PDCCH DMRS symbols for channel estimation through the second indication information, that is, use the PDCCH DMRS that is not mapped on the RE corresponding to the LTE CRS symbol. Perform channel estimation.
  • the symbols corresponding to the resource units mapped to the PDCCH DMRS are symbol 1 and symbol 2.
  • LTE CRS can also be transmitted on symbol 1.
  • Symbol 2 is only used to transmit NR PDCCH/PDCCH DMRS.
  • the network device can use the second indication information to instruct the terminal device to use the PDCCH DMRS transmitted on symbol 1 and symbol 2 for channel estimation.
  • the network device can use the second indication information to instruct the terminal device to use the PDCCH DMRS transmitted on symbol 2 for channel estimation.
  • the terminal device determines N resource units according to the PDCCH DMRS resource mapping type.
  • the N resource units are the resource units to which the PDCCH DMRS is mapped, and N is a positive integer greater than or equal to 1.
  • the resource unit involved in the embodiment of this application may be a basic resource unit for transmitting PDCCH DMRS.
  • the resource unit may be a RE.
  • the terminal equipment may determine the N resource units corresponding to the PDCCH DMRS resource mapping type according to the PDCCH DMRS resource mapping type indicated by the first indication information.
  • the N resource units may be located on one symbol, or the N resource units may be located on at least two symbols. For example, part of the N resource units are located on one symbol, and another part of the resource units are located on another symbol.
  • two symbols are mapped to the NR PDCCH.
  • One of the symbols has LTE CRS on it and the other symbol doesn't have LTE CRS.
  • the PDCCH DMRS resource mapping type indicated by the first indication information is: the network device only transmits the PDCCH DMRS on symbols without LTE CRS, then the N resource units to which the PDCCH DMRS is mapped are located on the same symbol.
  • the PDCCH DMRS resource mapping type indicated by the first indication information is: the network device transmits PDCCH DMRS on all symbols to which the NR PDCCH is mapped, then the N resources to which the PDCCH DMRS is mapped are single The elements are on different symbols.
  • the terminal device receives signals on N resource units.
  • the signal may include PDCCH DMRS, or the signal may include PDCCH DMRS and LTE CRS.
  • the terminal device After the terminal device determines N resource units according to the resource mapping method, it can receive PDCCH DMRS from the N resource units, or it can receive PDCCH DMRS and LTE CRS from the N resource units.
  • the network device can transmit the PDCCH DMRS in at least the following three ways.
  • the terminal equipment receives different signals.
  • Method 1 Puncture PDCCH/PDCCH DMRS.
  • the network device can delete the PDCCH on the resource unit; for the resource unit where the LTE CRS overlaps with the PDCCH DMRS, the network device can delete the PDCCH DMRS on the resource unit.
  • the signal received by the terminal equipment in the resource unit where LTE CRS and PDCCH overlap is LTE CRS; the signal received by the terminal equipment in the resource unit where LTE CRS and PDCCH DMRS overlap is LTE CRS.
  • NR network equipment can send PDCCH and PDCCH DMRS;
  • LTE network equipment can send LTE CRS.
  • the signals received are LTE CRS and PDCCH; when the terminal equipment is in the resource unit where LTE CRS and PDCCH DMRS overlap, the signals received are LTE CRS and PDCCH DMRS.
  • Method 3 Puncture the LTE CRS on antenna port 2 (port 2) and antenna port 3 (port 3).
  • the network device can disable LTE CRS on antenna port 2 and antenna port 3, that is, LTE CRS is not transmitted on symbol 1.
  • the signal received by the terminal equipment on the resource unit where the LTE CRS and the PDCCH overlap is the PDCCH; the signal received by the terminal equipment on the resource unit where the LTE CRS and the PDCCH DMRS overlap is the PDCCH DMRS.
  • the terminal equipment performs channel estimation on the NR PDCCH based on the signals received on the N resource units.
  • Channel estimation may be a process of estimating characteristic parameters of a channel used to transmit signals.
  • the characteristic parameters of the channel may be channel coefficients, channel noise, etc.
  • the terminal equipment can perform channel estimation on the NR PDCCH based on all received PDCCH DMRS or part of the PDCCH DMRS.
  • the symbols corresponding to the resource units mapped to the NR PDCCH are symbol 1 and symbol 2; symbol 1 is also used to map LTE CRS.
  • the terminal device can perform NR PDCCH channel estimation based on all PDCCH DMRS received on symbol 2.
  • the terminal device can perform NR PDCCH channel estimation based on all PDCCH DMRS received on symbol 1 and symbol 2, or the terminal device can perform NR PDCCH channel estimation based on The partial PDCCH DMRS received on symbol 2 performs NR PDCCH channel estimation.
  • the terminal device can determine the N resource units corresponding to the PDCCH DMRS resource mapping type according to the PDCCH DMRS resource mapping type indicated by the first indication information, and can determine the N resource units corresponding to the N resource units.
  • the received PDCCH DMRS performs channel estimation on the NR PDCCH. That is to say, the terminal device can determine the channel estimation method through the first indication information, thereby reducing the channel estimation complexity of the terminal device.
  • the resource mapping of PDCCH DMRS indicated by the first indication information includes at least the following two situations:
  • Figure 8 is a schematic flow chart of another channel estimation method provided by an embodiment of the present application. As shown in Figure 8, the method in this embodiment includes:
  • the terminal device receives the first instruction information.
  • the terminal device determines N resource units on the first symbol and the second symbol according to the PDCCH DMRS resource mapping type.
  • the N resource units are the resource units to which the PDCCH DMRS is mapped, and N is a positive integer greater than or equal to 1.
  • the resource mapping type of PDCCH DMRS may be: NR
  • the time domain resource of PDCCH includes the first symbol and the second symbol; the N resource units include M resource units corresponding to the first symbol, and the second symbol
  • the terminal equipment may determine N resource units on the first symbol and the second symbol according to the resource mapping type of the above-mentioned PDCCH DMRS.
  • the NR PDCCH and the LTE CRS on the second symbol do not overlap, and there are M resource units in the second symbol mapped with PDCCH DMRS.
  • the NR PDCCH overlaps with the LTE CRS on the first symbol.
  • the terminal device may determine the N resource units as M resource units on the first symbol and M resource units on the second symbol.
  • FIG. 9 is a schematic diagram of a resource mapping type provided by an embodiment of the present application.
  • CCE can include REG0, REG1...REG5.
  • Each REG occupies 12 subcarriers in the frequency domain and 1 symbol in the time domain.
  • REG0, REG2 and REG4 can occupy the same symbol in the time domain.
  • REG1, REG3 and REG5 can occupy the same symbol in the time domain. Take REG0 occupying symbol 1 and REG1 occupying symbol 2 as an example.
  • NR PDCCH overlaps with LTE CRS on symbol 1.
  • the resource units mapped with PDCCH DMRS in symbol 2 are subcarrier 1, subcarrier 5 and subcarrier 9 respectively.
  • the resource units mapped with PDCCH DMRS in symbol 1 are also subcarrier 1, subcarrier 5 and subcarrier 9 respectively.
  • subcarrier 1 in symbol 1 is also mapped with LTE CRS.
  • the number of resource units mapping PDCCH DMRS in REG0 is 3
  • the number of resource units mapping PDCCH DMRS in REG1 is 3;
  • the number of resource units mapping PDCCH DMRS and LTE CRS in REG0 and REG1 is 1.
  • the terminal device receives signals on the determined N resource units.
  • the M resource units on the second symbol are only mapped with PDCCH DMRS.
  • K resource units are mapped with PDCCH DMRS and LTE CRS at the same time, and the remaining resource units excluding the K resource units among the M resource units are only mapped with PDCCH DMRS.
  • the terminal device may receive the PDCCH DMRS on M resource units on the first symbol and M resource units on the second symbol.
  • the network equipment can transmit PDCCH DMRS in at least the following three ways:
  • Method 1 Puncture PDCCH/PDCCH DMRS.
  • the network device can delete the PDCCH on the resource unit; for the resource unit where the LTE CRS overlaps with the PDCCH DMRS, the network device can delete the PDCCH DMRS on the resource unit.
  • the signal received by the terminal equipment in the resource unit where LTE CRS and PDCCH overlap is LTE CRS; the signal received by the terminal equipment in the resource unit where LTE CRS and PDCCH DMRS overlap is LTE CRS.
  • NR network equipment can send PDCCH and PDCCH DMRS;
  • LTE network equipment can send LTE CRS.
  • the signals received are LTE CRS and PDCCH; when the terminal equipment is in the resource unit where LTE CRS and PDCCH DMRS overlap, the signals received are LTE CRS and PDCCH DMRS.
  • Method 3 Puncture the LTE CRS on antenna port 2 (port 2) and antenna port 3 (port 3).
  • the network device can disable LTE CRS on antenna port 2 and antenna port 3, that is, LTE CRS is not transmitted on symbol 1.
  • the signal received by the terminal equipment on the resource unit where LTE CRS and PDCCH overlap is PDCCH; the signal received by the terminal equipment on the resource unit where LTE CRS and PDCCH DMRS overlap is PDCCH DMRS.
  • the terminal device performs channel estimation on the NR PDCCH based on the signals received on the N resource units.
  • the terminal device can channel the NR PDCCH based on the LTE CRS received on K resource units and the PDCCH DMRS received on other resource units among the N resource units except K resource units. Estimation; or, perform channel estimation on the NR PDCCH according to the PDCCH DMRS received on the M resource units corresponding to the second symbol.
  • the terminal equipment can perform NR PDCCH channel estimation based on all PDCCH DMRS received on N resource units, or the terminal equipment can perform NR PDCCH channel estimation based on PDCCH DMRS received on M resource units on the second symbol. .
  • REG0 occupies symbol 1 and REG1 occupies symbol 2.
  • the terminal device receives PDCCH DMRS on subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 1 and subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2.
  • the subcarrier of symbol 1 is also used to transmit LTE CRS.
  • the terminal equipment can perform channel estimation based on the PDCCH DMRS received on subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 1 and subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2; or, the terminal equipment can also Channel estimation can be performed based on the PDCCH DMRS received on subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2.
  • the terminal device can determine N resource units for mapping PDCCH DMRS on the first symbol and the second symbol according to the mapping type of the PDCCH DMRS, and can determine the N resource units based on the received data on the N resource units.
  • PDCCH DMRS performs NR PDCCH channel estimation, or performs NR PDCCH channel estimation based on the PDCCH DMRS received on M resource units on the second symbol, thereby reducing the channel estimation complexity of the terminal equipment.
  • Figure 10 is a schematic flowchart of another channel estimation method provided by an embodiment of the present application. As shown in Figure 10, the method in this embodiment includes:
  • the terminal device receives the first instruction information.
  • the terminal device determines N resource units on the second symbol according to the PDCCH DMRS resource mapping type.
  • the N resource units are the resource units to which the PDCCH DMRS is mapped, and N is a positive integer greater than or equal to 1.
  • the resource mapping type of PDCCH DMRS may be: NR
  • the time domain resource of PDCCH includes a first symbol and a second symbol; wherein, N resource units correspond to the second symbol, and the resource unit corresponding to the first symbol includes LTE The resource unit to which CRS is mapped.
  • the resource corresponding to the second symbol The unit does not include the resource unit to which the LTE CRS is mapped.
  • the NR PDCCH overlaps with the LTE CRS on the first symbol. There is no overlap between NR PDCCH and LTE CRS on the second symbol.
  • the N resource units used for mapping PDCCH DMRS are on the second symbol, and the first symbol does not include resource units mapping PDCCH DMRS.
  • the terminal device receives signals on the determined N resource units.
  • the N resource units on the second symbol are only used for mapping PDCCH DMRS.
  • the terminal equipment can receive PDCCH DMRS on the N resource units.
  • the terminal device performs channel estimation on the NR PDCCH based on the signals received on the N resource units.
  • the terminal equipment receives the PDCCH DMRS in the N resource units on the second symbol, and can perform NR PDCCH channel estimation based on the PDCCH DMRS received from the N resource units.
  • the terminal equipment can determine N resource units mapping the PDCCH DMRS on the second symbol according to the mapping type of the PDCCH DMRS, and can perform NR based on the PDCCH DMRS received on the N resource units. PDCCH channel estimation, thereby reducing the channel estimation complexity of the terminal equipment.
  • NR PDCCH can also be transmitted on 3 symbols.
  • the above embodiments only take NR PDCCH transmission on 2 symbols as an example for explanation, and do not constitute a limitation on the technical solution provided by the embodiments of the present application.
  • Figure 11 is another NR PDCCH DMRS resource mapping diagram based on DSS technology. Please refer to Figure 11. Taking the number of LTE CRS ports as 4 and the cell-specific frequency offset as 0 as an example, the frequency domain positions of the LTE CRS are subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9. NR PDCCH is transmitted on symbol 1, symbol 2 and symbol 3.
  • LTE CRS can be transmitted on symbol 1 at the same time.
  • network equipment can knock down NR PDCCH and PDCCH DMRS.
  • the network device can delete the NR PDCCH and PDCCH DMRS on the overlapping RE.
  • PDCCH DMRS is transmitted on subcarrier 1 and subcarrier 5 of symbol 1; PDCCH DMRS and LTE CRS overlap on subcarrier 9, and the network equipment knocks out the PDCCH DMRS; on subcarrier 0, subcarrier 3, and subcarrier 6, NR PDCCH and LTE CRS overlap, network equipment Knocked out NR PDCCH.
  • Symbol 2 and Symbol 3 are not used to transmit LTE CRS.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2 are used to transmit PDCCH DMRS; the remaining subcarriers of symbol 2 are used to transmit NR PDCCH.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 3 are used to transmit PDCCH DMRS; NR PDCCH is transmitted on the remaining subcarriers of symbol 3.
  • Figure 12 is another NR PDCCH DMRS resource mapping diagram based on DSS technology. Please refer to Figure 12. Taking the number of LTE CRS ports as 4 and the cell-specific frequency offset as 0 as an example, the frequency domain positions of the LTE CRS are subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9. NR PDCCH is transmitted on symbol 1, symbol 2 and symbol 3.
  • LTE CRS can be transmitted on symbol 1 at the same time.
  • network equipment On symbols with LTE CRS, network equipment only transmits NR PDCCH and does not transmit PDCCH DMRS.
  • network equipment On REs with LTE CRS, network equipment can knock down NR PDCCH. For example, NR PDCCH and LTE CRS overlap on subcarrier 0, subcarrier 3, subcarrier 6 and subcarrier 9 of symbol 1, and the network equipment knocks out the NR PDCCH; NR PDCCH is transmitted on the remaining subcarriers of symbol 1.
  • Symbol 2 and Symbol 3 are not used to transmit LTE CRS.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 2 are used to transmit PDCCH DMRS; the remaining subcarriers of symbol 2 are used to transmit NR PDCCH.
  • Subcarrier 1, subcarrier 5 and subcarrier 9 of symbol 3 are used to transmit PDCCH DMRS; NR PDCCH is transmitted on the remaining subcarriers of symbol 3.
  • Figure 13 is a schematic structural diagram of a channel estimation device provided by an embodiment of the present application.
  • the channel estimation device provided in this embodiment may be a terminal device, or may be a module, unit, chip, chip module, etc. in the terminal device.
  • the channel estimation device 10 includes: a receiving module 11, a determining module 12 and an estimation module 13, where,
  • the receiving module 11 is used to receive first indication information, and the first indication information is used to indicate the PDCCH DMRS resource mapping type;
  • the determination module 12 is configured to determine N resource units according to the PDCCH DMRS resource mapping type, the N resource units are resource units to which the PDCCH DMRS is mapped, and the N is a positive integer greater than or equal to 1;
  • the receiving module 11 is also configured to receive signals on the N resource units;
  • the estimation module 13 is configured to perform channel estimation on the NR PDCCH according to the signals received on the N resource units.
  • the channel estimation device provided by this embodiment can be used to perform the The implementation principles and technical effects of the communication method are similar and will not be described in detail here.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • K resource units among the M resource units corresponding to the first symbol overlap with resource units mapped to the LTE CRS; the K is a positive integer.
  • the estimation module 13 is specifically used to:
  • Channel estimation is performed on the NR PDCCH according to the PDCCH DMRS received on the M resource units corresponding to the second symbol.
  • the time domain resource of the NR PDCCH includes a first symbol and a second symbol
  • the N resource units correspond to the second symbols
  • the resource units corresponding to the first symbols include resource units to which LTE CRS is mapped.
  • the resource unit corresponding to the second symbol does not include the resource unit to which the LTE CRS is mapped.
  • the receiving module 11 is specifically used to:
  • Receive second indication information where the second indication information is used to indicate a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the channel estimation device provided in this embodiment can be used to perform the communication method performed by the terminal device in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.
  • Figure 14 is a schematic structural diagram of another channel estimation device provided by an embodiment of the present application.
  • the channel estimation device provided in this embodiment may be a network device, or may be a module, unit, chip, chip module, etc. in the network device.
  • the channel estimation device 20 includes: a determining module 21 and a sending module 22, where,
  • the determination module 21 is used to determine the resource mapping type of PDCCH DMRS
  • the sending module 22 is configured to send first indication information to the terminal device, where the first indication information is used to indicate the PDCCH DMRS resource mapping type; the PDCCH DMRS resource mapping type is used to determine the resource unit to which the PDCCH DMRS is mapped.
  • the channel estimation device provided in this embodiment can be used to perform the communication method performed by the network device in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.
  • the sending module 22 is specifically used to:
  • Send second indication information where the second indication information is used to indicate resource units used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the PDCCH DMRS resource mapping type is associated with a resource unit used for channel estimation among the resource units to which the PDCCH DMRS is mapped.
  • the channel estimation device provided in this embodiment can be used to perform the communication method performed by the network device in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.
  • Figure 15 is a schematic diagram of the hardware structure of a channel estimation device provided by this application.
  • the channel estimation device may be a terminal device, or a chip, chip module, etc. in the terminal device.
  • the channel estimation device 30 may include: a processor 31 and a memory 32, where the processor 31 and the memory 32 can communicate; exemplarily, the processor 31 and the memory 32 communicate through a communication bus 33, and the memory 32 is used to store program instructions, and the processor 31 is used to call the program instructions in the memory to execute the log storage method shown in any of the above method embodiments.
  • the channel estimation device 30 may also include a communication interface, and the communication interface may include a transmitter and/or a receiver.
  • the above-mentioned processor can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC )wait.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in this application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • FIG 16 is a schematic diagram of the hardware structure of another channel estimation device provided by this application.
  • the channel estimation device may be a network device, or a chip, chip module, etc. in the network device.
  • the channel estimation device 40 may include: a processor 41 and a memory 42, where the processor 41 and the memory 42 can communicate; exemplarily, the processor 41 and the memory 42 communicate through a communication bus 43, and the memory 42 is used to store program instructions, and the processor 41 is used to call the memory
  • the program instructions execute the log storage method shown in any of the above method embodiments.
  • the channel estimation device 40 may also include a communication interface, and the communication interface may include a transmitter and/or a receiver.
  • the above-mentioned processor can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC )wait.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in this application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program is executed by a computer, the channel estimation method performed in any of the above method embodiments is implemented.
  • the principles and technical effects are similar and will not be described in detail here.
  • Embodiments of the present application also provide a computer program product, including a computer program.
  • the computer program When executed by a computer, it implements the channel estimation method performed in any of the above method embodiments.
  • the implementation principles and technical effects are similar and will not be described in detail here.
  • the aforementioned program can be stored in a readable memory.
  • the steps including the above method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviation: ROM), RAM, flash memory, hard disk, Solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disk (English: optical disc) and any combination thereof.
  • Embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor or other programmable terminal device to produce a machine, such that instructions executed by the processing unit of the computer or other programmable terminal device produce for implementation means a function specified in a process or processes in a flowchart and/or in a block or blocks in a block diagram.
  • These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory
  • the instructions produce an article of manufacture that includes instruction means to implement the functions specified in the process or processes of the flowcharts and/or the block or blocks of the block diagrams.
  • These computer program instructions may also be loaded onto a computer or other programmable terminal device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby causing the instructions to be executed on the computer or other programmable device
  • steps for implementing the functionality specified in a process or processes in a flow diagram and/or in a block or blocks in a block diagram are also be loaded onto a computer or other programmable terminal device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby causing the instructions to be executed on the computer or other programmable device.
  • the term “including” and its variations may refer to non-limiting inclusion; the term “or” and its variations may refer to “and/or”.
  • the terms “first”, “second”, etc. in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
  • “plurality” means two or more.
  • “And/or” describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character “/" generally indicates that the related objects are in an "or” relationship.

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Abstract

本申请提供一种信道估计方法、装置及设备，该方法包括：接收第一指示信息，第一指示信息用于指示物理下行控制信道PDCCH解调参考信号DMRS资源映射类型；根据PDCCH DMRS资源映射类型，确定N个资源单元，N个资源单元为PDCCH DMRS映射到的资源单元，N为大于或等于1的正整数；在N个资源单元上接收信号；根据在N个资源单元上接收到的信号，对新空口NR PDCCH进行信道估计。本申请中，终端设备可以根据第一指示信息确定NR PDCCH信道估计方式，从而降低了终端设备的信道估计复杂度。

Description

信道估计方法、装置及设备
本申请要求于2022年7月28日提交中国专利局、申请号为202210897757.X、申请名称为“信道估计方法、装置及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种信道估计方法、装置及设备。
背景技术
动态频谱共享(dynamic spectrum sharing，DSS)技术允许长期演进(longterm evolution，LTE)和新无线(new radio，NR)动态共享相同的频谱。
DSS技术中，NR物理下行控制信道(Physical downlink control channel，PDCCH)解调参考信号(Demodultion Reference Signal，DMRS)可以和LTE小区特定参考信号(Cell-specific Reference Signal，CRS)共享同一频谱。
因此，针对NR PDCCH信道估计的研究，以降低终端设备的信道估计复杂度，对于NR PDCCH通信性能的提升有重要的实际意义。
发明内容
本申请提供一种信道估计方法、装置及设备，降低了终端设备的信道估计复杂度。
第一方面，本申请提供一种信道估计方法，包括：
接收第一指示信息，所述第一指示信息用于指示物理下行控制信道PDCCH解调参考信号DMRS资源映射类型；
根据所述PDCCH DMRS资源映射类型，确定N个资源单元，所述N个资源单元为PDCCH DMRS映射到的资源单元，所述N为大于或等于1的正整数；
在所述N个资源单元上接收信号；
根据在所述N个资源单元上接收到的信号，对新空口NR PDCCH进行信道估计。
一种可能的实现方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
所述N个资源单元包括与所述第一符号对应的M个资源单元、和与所述第二符号对应的M个资源单元，所述N＝2M，且所述M为正整数；
其中，与第一符号对应的M个资源单元中K个资源单元与长期演进LTE小区特定参考信号CRS映射到的资源单元重叠；所述K为正整数。
一种可能的实现方式中，所述根据在所述N个资源单元上接收到的信号，对NR PDCCH进行信道估计，包括：
根据在所述K个资源单元上接收到的LTE CRS、以及在所述N个资源单元中除所述K个资源单元以外的其它资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计；或者，
根据在与所述第二符号对应的M个资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计。
一种可能的实现方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
其中，所述N个资源单元与所述第二符号对应，所述第一符号对应的资源单元包括LTE CRS映射到的资源单元。
一种可能的实现方式中，所述第二符号对应的资源单元不包括LTE CRS映射到的资源单元。
一种可能的实现方式中，所述方法还包括：
接收第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
一种可能的实现方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
第二方面，本申请提供一种信道估计方法，包括：
确定PDCCH DMRS的资源映射类型；
向终端设备发送第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；所述PDCCH DMRS资源映射类型用于确定PDCCH DMRS映射到的资源单元。
一种可能的实现方式中，所述方法还包括：
发送第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
一种可能的实现方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
第三方面，本申请提供一种信道估计装置，包括：接收模块、确定模块和估计模块，其中，
所述接收模块用于，接收第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；
所述确定模块用于，根据所述PDCCH DMRS资源映射类型，确定N个资源单元，所述N个资源单元为PDCCH DMRS映射到的资源单元，所述N为大于或等于1的正整数；
所述接收模块还用于，在所述N个资源单元上接收信号；
所述估计模块用于，根据在所述N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
在一种可能的实施方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
所述N个资源单元包括与所述第一符号对应的M个资源单元、和与所述第二符号对应的M个资源单元，所述N＝2M，且所述M为正整数；
其中，与第一符号对应的M个资源单元中K个资源单元与LTE CRS映射到的资源单元重叠；所述K为正整数。
在一种可能的实施方式中，所述估计模块具体用于：
根据在所述K个资源单元上接收到的LTE CRS、以及在所述N个资源单元中除所述K个资源单元以外的其它资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计；或者，
根据在与所述第二符号对应的M个资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计。
在一种可能的实施方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
其中，所述N个资源单元与所述第二符号对应，所述第一符号对应的资源单元包括LTE CRS映射到的资源单元。
在一种可能的实施方式中，所述第二符号对应的资源单元不包括LTE CRS映射到的资源单元。
在一种可能的实施方式中，所述接收模块具体用于：
接收第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
在一种可能的实施方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
第四方面，本申请提供一种信道估计装置，包括：确定模块和发送模块，其中，
所述确定模块用于，确定PDCCH DMRS的资源映射类型；
所述发送模块用于，向终端设备发送第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；所述PDCCH DMRS资源映射类型用于确定PDCCH DMRS映射到的资源单元。
在一种可能的实施方式中，所述发送模块具体用于：
发送第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
在一种可能的实施方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
第五方面，本申请提供一种信道估计设备，包括：处理器，以及与所述处理器通信连接的存储器；
所述存储器存储有计算机程序；
所述处理器执行所述计算机程序，以实现如第一方面任一项所述的方法。
第六方面，本申请提供一种信道估计设备，包括：处理器，以及与所述处理器通信连接的存储器；
所述存储器存储有计算机程序；
所述处理器执行所述计算机程序，以实现如第二方面任一项所述的方法。
第七方面，本申请提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时实现如第一方面任一项所述的方法。
第八方面，本申请提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时实现如第二方面 任一项所述的方法。
第九方面，本申请提供一种计算机程序产品，包括计算机程序，所述计算机程序被计算机执行时实现如第一方面任一项所述的方法。
第十方面，本申请提供一种计算机程序产品，包括计算机程序，所述计算机程序被计算机执行时实现如第二方面任一项所述的方法。
第十一方面，本申请提供一种芯片，所述芯片上存储有计算机程序，所述计算机程序被所述芯片执行时，实现如第一方面任一项所述的方法。该芯片还可以为芯片模组。
第十二方面，本申请提供一种芯片，所述芯片上存储有计算机程序，所述计算机程序被所述芯片执行时，实现如第二方面任一项所述的方法。该芯片还可以为芯片模组。
本申请提供的信道估计方法、装置及设备，终端设备可以根据第一指示信息指示的PDCCH DMRS资源映射类型，确定该PDCCH DMRS资源映射类型对应的N个资源单元，并可以根据在该N个资源单元上接收的PDCCH DMRS对NR PDCCH进行信道估计。也就是说，终端设备可以通过第一指示信息确定进行信道估计的方式，从而降低了终端设备的信道估计复杂度。
附图说明
图1为本申请实施例提供的一种LTE CRS资源映射示意图；
图2为本申请实施例提供的一种LTE和NR动态频谱共享示意图；
图3为本申请实施例提供的一种NR PDCCH DMRS资源映射示意图；
图4为基于DSS技术的一种NR PDCCH DMRS资源映射示意图；
图5为基于DSS技术的另一种NR PDCCH DMRS资源映射示意图；
图6为本申请实施例提供的一种通信系统架构的示意图；
图7为本申请实施例提供的一种信道估计方法的流程示意图；
图8为本申请实施例提供的另一种信道估计方法的流程示意图；
图9为本申请实施例提供的一种资源映射类型示意图；
图10为本申请实施例提供的又一种信道估计方法的流程示意图；
图11为基于DSS技术的又一种NR PDCCH DMRS资源映射示意图；
图12为基于DSS技术的又一种NR PDCCH DMRS资源映射示意图；
图13为本申请实施例提供的一种信道估计装置的结构示意图；
图14为本申请实施例提供的另一种信道估计装置的结构示意图；
图15为本申请提供的一种信道估计设备的硬件结构示意图；
图16为本申请提供的另一种信道估计设备的硬件结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
本申请涉及通信技术，为便于本申请实施例的理解，首先对本申请涉及的相关通信技术进行详细说明。
1)LTE小区特定参考信号(Cell-specific Reference Signal，CRS)资源映射：
如图1所示，图1为本申请实施例提供的一种LTE CRS资源映射示意图。请参见图1，每个CRS占一个资源元素(Resource element，RE)。CRS在每个下行子帧、整个下行带宽内的每个资源块(Resource Block，RB)上都会发送。CRS在每个RB内的起始位置和小区特定的频率偏移(frequency shift)相关。
小区可以使用1个CRS、2个CRS或者4个CRS。其中，LTE小区使用1个CRS时，可以使用1个天线端口(例如，天线端口0)；LTE小区使用2个CRS时，可以使用2个天线端口(例如，天线端口0和天线端口1)；LTE小区使用4个CRS时，可以使用4个天线端口(例如，天线端口0、天线端 口1、天线端口2和天线端口3)。
当小区使用1个CRS时，CRS会插入到每个时隙的第1个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号和倒数第3个OFDM符号中。同一个OFDM符号内相邻的2个CRS在频域上间隔6个子载波。同时，倒数第3个OFDM符号中的CRS和第1个OFDM符号中的CRS在频域上个间隔3个子载波。
当小区使用2个CRS时，第1个天线端口(天线端口0)CRS与第2个天线端口上(天线端口1)的CRS在频域上复用，二者在频域上偏移了3个子载波。
当小区使用4个CRS时，第3个天线端口上(天线端口2)的CRS和第4个天线端口上(天线端口3)的参考信号在频域上复用，二者在频域上偏移了3个子载波。第3个和第4个天线端口上的CRS在每个时隙的第2个OFDM符号上传输。这样第3个和第4个天线端口就与第1个和第2个天线端口上的参考信号在时域上进行了复用。
2)DSS：
DSS指NR和LTE动态共享同一段频谱的技术。
如图2所示，图2为本申请实施例提供的一种LTE和NR动态频谱共享示意图。请参见图2，LTE和NR动态共享一个频段。示例性的，在时域维度上，DSS支持以1ms为周期的瞬时共享，即每1ms进行一次频谱资源的协调调度。在频域维度上，DSS支持以1RB为粒度的动态共享，根据LTE侧和NR侧的业务量需求进行动态资源分配。
3)PDCCH DMRS资源映射：
如图3所示，图3为本申请实施例提供的一种PDCCH DMRS资源映射示意图。请参见图3，PDCCH资源分配基本组成单位可以为资源元素组(Resource Element Group，REG)。REG可以由时域上的一个OFDM符号、及频域上12个子载波(即1个RB)来定义。
PDCCH DMRS又可以称之为NR PDCCH DMRS，为用于解调NR PDCCH的参考信号。例如，用于映射PDCCH DMRS的3个RE均匀分布在NR PDCCH映射到的每个REG内，该3个RE可以为REG内子载波1、子载波5和子载波9对应的RE。
在DSS技术中，网络设备映射NR PDCCH和PDCCH DMRS时有多种不 同的情况，下面结合图4-图5，示例性的对NR PDCCH和PDCCH DMRS的传输方式进行说明。
以LTE CRS端口数量为4、小区特定的频率偏移为0为例。一种可能的传输方式如图4所示，图4为基于DSS技术的一种NR PDCCH DMRS资源映射示意图。请参见图4，LTE CRS的频域位置为子载波0、子载波3、子载波6和子载波9。NR PDCCH在符号1和符号2上传输。
符号1上同时可以传输LTE CRS。在有LTE CRS的RE上，网络设备可以打掉NR PDCCH和PDCCH DMRS。也就是说，若LTE CRS与NR PDCCH或者PDCCH DMRS重叠，网络设备可以打掉重叠RE上的NR PDCCH和PDCCH DMRS。例如，符号1的子载波1和子载波5上传输PDCCH DMRS；子载波9上PDCCH DMRS和LTE CRS重叠，网络设备打掉了PDCCH DMRS；子载波0、子载波3和子载波6上，NR PDCCH和LTE CRS重叠，网络设备打掉了NR PDCCH。
符号2不用于传输LTE CRS。符号2的子载波1、子载波5和子载波9用于传输PDCCH DMRS。符号2的其余子载波上传输NR PDCCH。
以LTE CRS端口数量为4、小区特定的频率偏移为0为例，另一种可能的传输方式如图5所示，图5为基于DSS技术的另一种NR PDCCH DMRS资源映射示意图。请参见图5，LTE CRS的频域位置为子载波0、子载波3、子载波6和子载波9。NR PDCCH在符号1和符号2上传输。
符号1上同时可以传输LTE CRS。在有LTE CRS的符号上，网络设备只传输NR PDCCH，不传输PDCCH DMRS。在有LTE CRS的RE上，网络设备可以打掉NR PDCCH。例如，符号1的子载波0、子载波3、子载波6和子载波9上NR PDCCH和LTE CRS重叠，网络设备打掉了NR PDCCH；符号1的其余子载波上传输NR PDCCH。
符号2不用于传输LTE CRS。符号2的子载波1、子载波5和子载波9用于传输PDCCH DMRS。符号2的其余子载波上传输NR PDCCH。
如图6所示，图6为本申请实施例提供的一种通信系统架构的示意图。请参见图6，该通信系统包括：网络设备和终端设备。
上述通信系统架构中，网络设备可以为下一代基站(next generation node B，gNB)，网络设备支持NR和LTE之间的DSS技术。
终端设备可以基于NR与网络设备通信。例如，终端设备可以接收网络设 备发送的NR PDCCH，并可以通过PDCCH DMRS进行NR PDCCH信道估计。应该理解的是，终端设备的数量可以为一个或多个，对此本申请实施例不做限定。
需要说明的是，本申请实施例描述的系统架构是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的问题，同样适用。
下面，对相关技术中，终端设备的信道估计方式进行详细说明。
如图4-图5所述，网络设备传输PDCCH DMRS时，存在多种不同的情况。针对网络设备传输PDCCH DMRS的不同情况，终端设备至少可以通过如下3种方式进行信道估计：
方式1：终端设备采用所有映射NR PDCCH的符号上的PDCCH DMRS进行信道估计。
方式2：终端设备采用只映射NR PDCCH和PDCCH DMRS的符号上的PDCCH DMRS进行信道估计，即采用不映射在LTE CRS的符号对应的RE上的PDCCH DMRS进行信道估计。
方式3：针对有LTE CRS的符号，终端设备采用有用RE上的PDCCH DMRS进行信道估计；针对只映射NR PDCCH和PDCCH DMRS的符号，终端设备采用该符号上的PDCCH DMRS进行信道估计。这里的有用RE可以理解为：PDCCH DMRS所占用的RE、且与LTE CRS所占用的RE不重叠或不碰撞。
终端设备针对NR PDCCH进行信道估计时，需要根据不同的LTE CRS资源映射形式，进行不同的PDCCH DMRS处理。例如，终端设备需要根据LTE CRS的频率偏移、天线端口的数量、带宽和载波频率等，确定LTE CRS的位置。终端设备的信道估计复杂度较高。
有鉴于此，本申请实施例通过网络设备向终端设备发送指示信息，以使终端设备可以根据指示信息确定信道估计方式，从而降低了终端设备的信道估计复杂度。
下面以具体地实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
图7为本申请实施例提供的一种信道估计方法的流程示意图。如图7所示，本实施例的方法包括：
S701、网络设备确定PDCCH DMRS的资源映射类型。
网络设备可以为第五代移动通信技术(5thgeneration，5G)NR系统中的gNB。
PDCCH DMRS为解调NR PDCCH的参考信号，PDCCH DMRS可以用于对NR PDCCH进行信道估计。
PDCCH DMRS资源映射可以为，由网络设备执行的PDCCH DMRS的传输资源的分配。
PDCCH DMRS资源映射类型又可以称为PDCCH DMRS资源映射方式等。示例的，PDCCH DMRS资源映射类型用于指示PDCCH DMRS在LTE CRS所在符号对应的资源单元的映射情况。例如，PDCCH DMRS资源映射方式可以用于指示不在LTE CRS所在符号对应的资源单元上映射PDCCH DMRS。或者，PDCCH DMRS资源映射方式可以用于指示在LTE CRS所在符号对应的资源单元上映射PDCCH DMRS。
应该理解的是，网络设备可以根据时频域中的可用资源等信息，确定一种PDCCH DMRS资源映射方式。
S702、网络设备向终端设备发送第一指示信息。
相应的，终端设备从网络设备接收第一指示信息。
终端设备可以为支持NR网络制式的电子设备。例如，终端设备可以为支持NR网络制式的车辆、车载终端或者车载设备，也可以是用户终端、移动设备或者边缘设备，还可以是路侧设备等。
第一指示信息用于指示PDCCH DMRS资源映射类型。
第一指示信息包括但不限于为系统信息广播(System Information Block，SIB)、终端设备专有(UE-specific)信令或者其他系统消息。本申请实施例对第一指示信息的具体形式不做限定。例如，终端设备专有信令可以为PDCCH配置(PDCCH-config)信令。
一种可能的实现方式中，第一指示信息还可以用于指示信道估计方式。
网络设备可以根据PDCCH DMRS资源映射类型，确定信道估计方式，并通过第一指示信息向终端设备发送信道估计方式。
信道估计方式可以为，通过所有映射NR PDCCH的符号上的PDCCH  DMRS进行信道估计；或者，信道估计方式可以为，通过不映射LTE CRS的符号上的PDCCH DMRS进行信道估计。
具体而言，第一指示信息可以包括预设比特位的取值。预设比特位的取值可以为第一值或者第二值。预设比特位的取值为第一值(例如，第一值可以为0)时，信道估计方式可以为通过所有映射NR PDCCH的符号上的PDCCH DMRS进行信道估计；预设比特位的取值为第二值(例如，第二值可以为1)时，信道估计方式可以为通过不映射LTE CRS的符号上的PDCCH DMRS进行信道估计。或者，
第一指示信息可以包括预设参数的状态。预设参数的状态可以为启用(enabled)状态或者禁用(disenabled)状态。预设参数的状态为启用状态时，信道估计方式可以为，通过不映射LTE CRS的符号上的PDCCH DMRS进行信道估计；预设参数的状态为禁用状态时，信道估计方式可以为，通过所有映射NR PDCCH的符号上的PDCCH DMRS进行信道估计。
一种可能的实现方式中，PDCCH DMRS资源映射类型与PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
资源单元可以为传输PDCCH DMRS的基本资源单元，例如，资源单元可以为RE。也就是说，终端设备和网络设备之间可以以资源单元为粒度进行通信。例如，网络设备可以在一个或多个资源单元上发送PDCCH DMRS。或者，终端设备可以在一个或多个资源单元上接收PDCCH DMRS。
具体而言，针对任意一种PDCCH DMRS资源映射类型，网络设备采用该资源映射类型时，终端设备可以采用PDCCH DMRS映射到的全部资源单元上传输的PDCCH DMRS和LTE CRS进行信道估计，或者，终端设备可以采用PDCCH DMRS映射到的部分资源单元上传输的PDCCH DMRS进行信道估计。也就是说，任意一种PDCCH DMRS资源映射类型可以对应一种或多种信道估计方式。
一种可能的实现方式中，网络设备还可以向终端设备发送第二指示信息。
第二指示信息用于指示PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
第二指示信息包括但不限于为系统信息广播或者其他系统消息。本申请实施例对第二指示信息的具体形式不做限定。
具体而言，网络设备可以根据PDCCH DMRS资源映射情况、以及LTE  CRS对NR PDCCH/PDCCH DMRS的干扰情况，指示终端设备根据指定的一个或多个符号上接收的PDCCH DMRS进行信道估计。例如，LTE CRS对NR PDCCH/PDCCH DMRS干扰不严重时，网络设备可以通过第二指示信息，指示终端设备采用所有映射NR PDCCH的符号上的PDCCH DMRS进行信道估计；LTE CRS对NR PDCCH/PDCCH DMRS干扰严重时，网络设备可以通过第二指示信息，指示终端设备采用只映射NR PDCCH和PDCCH DMRS的符号上的PDCCH DMRS进行信道估计，即采用不映射在LTE CRS的符号对应的RE上的PDCCH DMRS进行信道估计。
示例性的，假设PDCCH DMRS映射到的资源单元对应的符号为符号1和符号2。符号1上还可以传输LTE CRS。符号2上只用于传输NR PDCCH/PDCCH DMRS。当LTE CRS对NR PDCCH/PDCCH DMRS干扰不严重时，网络设备可以通过第二指示信息，指示终端设备采用符号1和符号2上传输的PDCCH DMRS进行信道估计。当LTE CRS对NR PDCCH/PDCCH DMRS干扰严重时，网络设备可以通过第二指示信息，指示终端设备采用符号2上传输的PDCCH DMRS进行信道估计。
S703、终端设备根据PDCCH DMRS资源映射类型，确定N个资源单元。
N个资源单元为PDCCH DMRS映射到的资源单元，N为大于或等于1的正整数。
本申请实施例中涉及的资源单元可以为传输PDCCH DMRS的基本资源单元，例如，资源单元可以为RE。
终端设备可以根据第一指示信息指示的PDCCH DMRS资源映射类型，确定该PDCCH DMRS资源映射类型对应的N个资源单元。该N个资源单元可以位于一个符号上，或者该N个资源单元也可以位于至少两个符号上。例如，N个资源单元中的部分资源单元位于一个符号上，另外一部分资源单元位于另一个符号上。
示例性的，以NR PDCCH映射到的符号为两个为例。其中一个符号上有LTE CRS，另一个符号上没有LTE CRS。若第一指示信息指示的PDCCH DMRS资源映射类型为：网络设备只在没有LTE CRS的符号上传输PDCCH DMRS，则PDCCH DMRS映射到的N资源单元位于同一符号上。若第一指示信息指示的PDCCH DMRS资源映射类型为：网络设备在NR PDCCH映射到的所有符号上均传输PDCCH DMRS，则PDCCH DMRS映射到的N资源单 元位于不同的符号上。
S704、终端设备在N个资源单元上接收信号。
示例的，信号可以包括PDCCH DMRS，或者信号可以包括PDCCH DMRS和LTE CRS。
终端设备根据资源映射方式确定N个资源单元后，可以从该N个资源单元上接收PDCCH DMRS，或者可以从该N个资源单元上接收PDCCH DMRS和LTE CRS。
需要说明的是，当PDCCH DMRS资源映射方式指示在LTE CRS所在符号对应的资源单元上映射PDCCH DMRS时，网络设备至少可以采用如下3种方式传输PDCCH DMRS。相应的，网络设备采用不同的方式传输PDCCH DMRS时，终端设备接收的信号不同。
方式1：打掉(puncture)PDCCH/PDCCH DMRS。
该方式中，针对LTE CRS与PDCCH重叠的资源单元，网络设备可以打掉该资源单元上的PDCCH；针对LTE CRS与PDCCH DMRS重叠的资源单元，网络设备可以打掉该资源单元上的PDCCH DMRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元，接收的信号为LTE CRS；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元，接收的信号为LTE CRS。
方式2：重叠传输(superposition)。
该方式中，NR网络设备可以发送PDCCH和PDCCH DMRS；LTE网络设备可以发送LTE CRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元，接收的信号为LTE CRS和PDCCH；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元，接收的信号为LTE CRS和PDCCH DMRS。
方式3：打掉(puncture)天线端口2(port 2)和天线端口3(port 3)上的LTE CRS。
该方式中，网络设备可以打掉天线端口2和天线端口3上的LTE CRS，即符号1上不传输LTE CRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元上，接收的信号为PDCCH；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元上，接收的信号为PDCCH DMRS。
S705、终端设备根据在N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
信道估计可以为，对用于传输信号的信道的特性参数进行估计的过程。例如，信道的特性参数可以为信道系数、信道噪声等。
本申请实施例中，终端设备可以根据接收到的全部PDCCH DMRS，或者部分PDCCH DMRS，对NR PDCCH进行信道估计。
示例性的，假设NR PDCCH映射到的资源单元对应的符号为符号1和符号2；符号1同时用于映射LTE CRS。
若PDCCH DMRS资源映射方式指示不在LTE CRS所在符号对应的资源单元上映射PDCCH DMRS，则终端设备可以根据在符号2上接收的全部PDCCH DMRS进行NR PDCCH信道估计。
若PDCCH DMRS资源映射方式指示在LTE CRS所在符号对应的资源单元上映射PDCCH DMRS，则终端设备可以根据在符号1和符号2上接收的全部PDCCH DMRS进行NR PDCCH信道估计，或者终端设备可以根据在符号2上接收的部分PDCCH DMRS进行NR PDCCH信道估计。
本实施例提供的信道估计方法中，终端设备可以根据第一指示信息指示的PDCCH DMRS资源映射类型，确定该PDCCH DMRS资源映射类型对应的N个资源单元，并可以根据在该N个资源单元上接收的PDCCH DMRS对NR PDCCH进行信道估计。也就是说，终端设备可以通过第一指示信息确定进行信道估计的方式，从而降低了终端设备的信道估计复杂度。
在图7实施例的基础上，第一指示信息指示的PDCCH DMRS的资源映射至少包括如下2种情况：
情况1：PDCCH DMRS资源映射到的N个资源单元在2个符号上。
情况2：PDCCH DMRS资源映射到的N个资源单元在1个符号上。
下面，结合图8，对上述情况1进行说明。
图8为本申请实施例提供的另一种信道估计方法的流程示意图。如图8所示，本实施例的方法包括：
S801、终端设备接收第一指示信息。
S801的实现方式可以参见S702的详细描述，此处不做赘述。
S802、终端设备根据PDCCH DMRS资源映射类型，在第一符号和第二符号上确定N个资源单元。
N个资源单元为PDCCH DMRS映射到的资源单元，N为大于或等于1的正整数。
本实施例中，PDCCH DMRS的资源映射类型可以为：NR PDCCH的时域资源包括第一符号和第二符号；N个资源单元包括与第一符号对应的M个资源单元、和与第二符号对应的M个资源单元，N＝2M，且M为正整数；其中，与第一符号对应的M个资源单元中K个资源单元与LTE CRS映射到的资源单元重叠；K为正整数。
终端设备可以根据上述PDCCH DMRS的资源映射类型，在第一符号和第二符号上确定N个资源单元。
具体而言，用于传输NR PDCCH的第一符号和第二符号中，第二符号上NR PDCCH与LTE CRS不重叠，且第二符号中有M个资源单元映射有PDCCH DMRS。第一符号上NR PDCCH与LTE CRS重叠，第一符号中也有M个资源单元映射有PDCCH DMRS，但该M个资源单元中有K个资源单元还映射有LTE CRS。此时，终端设备可以确定N个资源单元为第一符号上的M个资源单元和第二符号上的M个资源单元。
示例性的，如图9所示，图9为本申请实施例提供的一种资源映射类型示意图。如图9所示，以PDCCH的聚合等级为1(即PDCCH由一个控制信道元素(Control Channel Element，CCE)组成)为例，CCE可以包括REG0、REG1……REG5。每个REG在频域上占用12个子载波，在时域上占用1个符号。REG0、REG2和REG4可以占用时域上同一个符号。REG1、REG3和REG5可以占用时域上同一个符号。以REG0占用符号1、REG1占用符号2为例。
符号2上NR PDCCH与LTE CRS不重叠。符号1上NR PDCCH与LTE CRS重叠。符号2中映射有PDCCH DMRS的资源单元分别为子载波1、子载波5和子载波9。符号1中映射有PDCCH DMRS的资源单元也分别为子载波1、子载波5和子载波9，同时符号1中的子载波1还映射有LTE CRS。则REG0中映射PDCCH DMRS的资源单元的数量3，REG1中映射PDCCH DMRS的资源单元的数量3；REG0和REG1中同时映射PDCCH DMRS和LTE CRS的资源单元的数量1。以此类推，可以确定PDCCH中N为18，M为9，K为3。
S803、终端设备在确定的N个资源单元上接收信号。
本实施例中，第二符号上的M个资源单元只映射有PDCCH DMRS。第一符号上的M个资源单元中有K个资源单元同时映射有PDCCH DMRS和LTE CRS，该M个资源单元中排除该K个资源单元以外的其余资源单元只映射有PDCCH DMRS。
终端设备可以在第一符号上的M个资源单元和第二符号上的M个资源单元接收PDCCH DMRS。
需要说明的是，当网络设备采用的PDCCH DMRS资源传输方式不同时，终端设备接收的信号不同，网络设备至少可以采用如下3种方式传输PDCCH DMRS：
方式1：打掉(puncture)PDCCH/PDCCH DMRS。
该方式中，针对LTE CRS与PDCCH重叠的资源单元，网络设备可以打掉该资源单元上的PDCCH；针对LTE CRS与PDCCH DMRS重叠的资源单元，网络设备可以打掉该资源单元上的PDCCH DMRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元，接收的信号为LTE CRS；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元，接收的信号为LTE CRS。
方式2：重叠传输(superposition)。
该方式中，NR网络设备可以发送PDCCH和PDCCH DMRS；LTE网络设备可以发送LTE CRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元，接收的信号为LTE CRS和PDCCH；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元，接收的信号为LTE CRS和PDCCH DMRS。
方式3：打掉(puncture)天线端口2(port 2)和天线端口3(port 3)上的LTE CRS。
该方式中，网络设备可以打掉天线端口2和天线端口3上的LTE CRS，即符号1上不传输LTE CRS。
相应的，终端设备在LTE CRS与PDCCH重叠的资源单元上，接收的信号为PDCCH；终端设备在LTE CRS与PDCCH DMRS重叠的资源单元上，接收的信号为PDCCH DMRS。
S804、终端设备根据在N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
本实施例中，终端设备可以根据在K个资源单元上接收到的LTE CRS、以及在N个资源单元中除K个资源单元以外的其它资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计；或者，根据在与第二符号对应的M个资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计。
具体而言，终端设备可以根据N个资源单元上接收的所有PDCCH DMRS进行NR PDCCH信道估计，或者终端设备可以根据第二符号上的M个资源单元上接收到的PDCCH DMRS，进行NR PDCCH信道估计。
示例性的，请参见图9，以REG0和REG1为例，REG0占用符号1、REG1占用符号2。终端设备在符号1的子载波1、子载波5和子载波9，以及符号2的子载波1、子载波5和子载波9上接收到PDCCH DMRS。同时，符号1的子载波还用于传输LTE CRS。该情况下，终端设备可以根据符号1的子载波1、子载波5和子载波9，以及符号2的子载波1、子载波5和子载波9上接收到PDCCH DMRS进行信道估计；或者，终端设备也可以根据符号2的子载波1、子载波5和子载波9上接收到PDCCH DMRS进行信道估计。
本实施例提供的信道估计方法中，终端设备可以根据PDCCH DMRS的映射类型，在第一符号和第二符号上确定N个映射PDCCH DMRS的资源单元，并可以根据该N个资源单元上接收的PDCCH DMRS进行NR PDCCH信道估计，或者根据第二符号上M个资源单元上接收的PDCCH DMRS进行NR PDCCH信道估计，从而降低了终端设备的信道估计复杂度。
下面，结合图10，对上述情况2进行说明。
图10为本申请实施例提供的又一种信道估计方法的流程示意图。如图10所示，本实施例的方法包括：
S1001、终端设备接收第一指示信息。
S1001的实现方式可以参见S702的详细描述，此处不做赘述。
S1002、终端设备根据PDCCH DMRS资源映射类型，在第二符号上确定N个资源单元。
N个资源单元为PDCCH DMRS映射到的资源单元，N为大于或等于1的正整数。
本实施例中，PDCCH DMRS的资源映射类型可以为：NR PDCCH的时域资源包括第一符号和第二符号；其中，N个资源单元与第二符号对应，第一符号对应的资源单元包括LTE CRS映射到的资源单元。第二符号对应的资源 单元不包括LTE CRS映射到的资源单元。
具体而言，用于传输NR PDCCH的第一符号和第二符号中，第一符号上NR PDCCH与LTE CRS重叠。第二符号上NR PDCCH与LTE CRS不重叠。用于映射PDCCH DMRS的N个资源单元在第二符号上，第一符号上不包括映射PDCCH DMRS的资源单元。
S1003、终端设备在确定的N个资源单元上接收信号。
本实施例中，第二符号上的N个资源单元只用于映射PDCCH DMRS。终端设备可以在该N个资源单元上接收PDCCH DMRS。
S1004、终端设备根据在N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
终端设备在第二符号上的N个资源单元中接收PDCCH DMRS，并可以根据从该N个资源单元中接收的PDCCH DMRS，进行NR PDCCH信道估计。
本实施例提供的信道估计方法中，终端设备可以根据PDCCH DMRS的映射类型，在第二符号上确定N个映射PDCCH DMRS的资源单元，并可以根据该N个资源单元上接收的PDCCH DMRS进行NR PDCCH信道估计，从而降低了终端设备的信道估计复杂度。
需要说明的是，NR PDCCH也可以在3个符号上进行传输。上述实施例仅以NR PDCCH在2个符号上传输为例进行说明，并不构成对于本申请实施例提供的技术方案的限定。
下面，以NR PDCCH在3个符号上进行传输为例，结合图11-图12，示例性的对NR PDCCH和PDCCH DMRS的传输方式进行说明。
一种可能的传输方式如图11所示，图11为基于DSS技术的又一种NR PDCCH DMRS资源映射示意图。请参见图11，以LTE CRS端口数量为4、小区特定的频率偏移为0为例，LTE CRS的频域位置为子载波0、子载波3、子载波6和子载波9。NR PDCCH在符号1、符号2和符号3上传输。
符号1上同时可以传输LTE CRS。在有LTE CRS的RE上，网络设备可以打掉NR PDCCH和PDCCH DMRS。也就是说，若LTE CRS与NR PDCCH或者PDCCH DMRS重叠，网络设备可以打掉重叠RE上的NR PDCCH和PDCCH DMRS。例如，符号1的子载波1和子载波5上传输PDCCH DMRS；子载波9上PDCCH DMRS和LTE CRS重叠，网络设备打掉了PDCCH DMRS；子载波0、子载波3和子载波6上，NR PDCCH和LTE CRS重叠，网络设备 打掉了NR PDCCH。
符号2和符号3不用于传输LTE CRS。符号2的子载波1、子载波5和子载波9用于传输PDCCH DMRS；符号2的其余子载波上传输NR PDCCH。符号3的子载波1、子载波5和子载波9用于传输PDCCH DMRS；符号3的其余子载波上传输NR PDCCH。
另一种可能的传输方式如图12所示，图12为基于DSS技术的又一种NR PDCCH DMRS资源映射示意图。请参见图12，以LTE CRS端口数量为4、小区特定的频率偏移为0为例，LTE CRS的频域位置为子载波0、子载波3、子载波6和子载波9。NR PDCCH在符号1、符号2和符号3上传输。
符号1上同时可以传输LTE CRS。在有LTE CRS的符号上，网络设备只传输NR PDCCH，不传输PDCCH DMRS。在有LTE CRS的RE上，网络设备可以打掉NR PDCCH。例如，符号1的子载波0、子载波3、子载波6和子载波9上NR PDCCH和LTE CRS重叠，网络设备打掉了NR PDCCH；符号1的其余子载波上传输NR PDCCH。
符号2和符号3不用于传输LTE CRS。符号2的子载波1、子载波5和子载波9用于传输PDCCH DMRS；符号2的其余子载波上传输NR PDCCH。符号3的子载波1、子载波5和子载波9用于传输PDCCH DMRS；符号3的其余子载波上传输NR PDCCH。
图13为本申请实施例提供的一种信道估计装置的结构示意图。本实施例提供的信道估计装置可以为终端设备，或者，为终端设备中的模块、单元、芯片、芯片模组等。请参见图13，该信道估计装置10包括：接收模块11、确定模块12和估计模块13，其中，
所述接收模11块用于，接收第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；
所述确定模块12用于，根据所述PDCCH DMRS资源映射类型，确定N个资源单元，所述N个资源单元为PDCCH DMRS映射到的资源单元，所述N为大于或等于1的正整数；
所述接收模块11还用于，在所述N个资源单元上接收信号；
所述估计模块13用于，根据在所述N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
本实施例提供的信道估计装置，可用于执行上述方法实施例中由终端设 备执行的通信方法，其实现原理和技术效果类似，此处不作赘述。
在一种可能的实施方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
所述N个资源单元包括与所述第一符号对应的M个资源单元、和与所述第二符号对应的M个资源单元，所述N＝2M，且所述M为正整数；
其中，与第一符号对应的M个资源单元中K个资源单元与LTE CRS映射到的资源单元重叠；所述K为正整数。
在一种可能的实施方式中，所述估计模块13具体用于：
根据在所述K个资源单元上接收到的LTE CRS、以及在所述N个资源单元中除所述K个资源单元以外的其它资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计；或者，
根据在与所述第二符号对应的M个资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计。
在一种可能的实施方式中，所述NR PDCCH的时域资源包括第一符号和第二符号；
其中，所述N个资源单元与所述第二符号对应，所述第一符号对应的资源单元包括LTE CRS映射到的资源单元。
在一种可能的实施方式中，所述第二符号对应的资源单元不包括LTE CRS映射到的资源单元。
在一种可能的实施方式中，所述接收模块11具体用于：
接收第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
在一种可能的实施方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
本实施例提供的信道估计装置，可用于执行上述方法实施例中由终端设备执行的通信方法，其实现原理和技术效果类似，此处不作赘述。
图14为本申请实施例提供的另一种信道估计装置的结构示意图。本实施例提供的信道估计装置可以为网络设备，或者，为网络设备中的模块、单元、芯片、芯片模组等。请参见图14，该信道估计装置20包括：确定模块21和发送模块22，其中，
所述确定模块21用于，确定PDCCH DMRS的资源映射类型；
所述发送模块22用于，向终端设备发送第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；所述PDCCH DMRS资源映射类型用于确定PDCCH DMRS映射到的资源单元。
本实施例提供的信道估计装置，可用于执行上述方法实施例中由网络设备执行的通信方法，其实现原理和技术效果类似，此处不作赘述。
在一种可能的实施方式中，所述发送模块22具体用于：
发送第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
在一种可能的实施方式中，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
本实施例提供的信道估计装置，可用于执行上述方法实施例中由网络设备执行的通信方法，其实现原理和技术效果类似，此处不作赘述。
图15为本申请提供的一种信道估计设备的硬件结构示意图。该信道估计设备可以为终端设备，或者为终端设备中的芯片、芯片模组等。请参见图15，该信道估计设备30可以包括：处理器31和存储器32，其中，处理器31和存储器32可以通信；示例性的，处理器31和存储器32通过通信总线33通信，所述存储器32用于存储程序指令，所述处理器31用于调用存储器中的程序指令执行上述任意方法实施例所示的日志存储方法。
可选的，信道估计设备30还可以包括通信接口，通信接口可以包括发送器和/或接收器。
可选的，上述处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
图16为本申请提供的另一种信道估计设备的硬件结构示意图。该信道估计设备可以为网络设备，或者为网络设备中的芯片、芯片模组等。请参见图16，该信道估计设备40可以包括：处理器41和存储器42，其中，处理器41和存储器42可以通信；示例性的，处理器41和存储器42通过通信总线43通信，所述存储器42用于存储程序指令，所述处理器41用于调用存储器中 的程序指令执行上述任意方法实施例所示的日志存储方法。
可选的，信道估计设备40还可以包括通信接口，通信接口可以包括发送器和/或接收器。
可选的，上述处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机程序，所述计算机程序被计算机执行时，实现如上任一方法实施例执行的信道估计方法，其实现原理和技术效果类似，此处不作赘述。
本申请实施例还提供一种计算机程序产品，包括计算机程序，所述计算机程序被计算机执行时实现如上任一方法实施例执行的信道估计方法，其实现原理和技术效果类似，此处不作赘述。
实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一可读取存储器中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储器(存储介质)包括：只读存储器(英文：read-only memory，缩写：ROM)、RAM、快闪存储器、硬盘、固态硬盘、磁带(英文：magnetic tape)、软盘(英文：floppy disk)、光盘(英文：optical disc)及其任意组合。
本申请实施例是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程终端设备的处理单元以产生一个机器，使得通过计算机或其他可编程终端设备的处理单元执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程终端设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的 指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程终端设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。
在本申请中，术语“包括”及其变形可以指非限制性的包括；术语“或”及其变形可以指“和/或”。本申请中术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。本申请中，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。

Claims (15)

  1. 一种信道估计方法，其特征在于，包括：
    接收第一指示信息，所述第一指示信息用于指示物理下行控制信道PDCCH解调参考信号DMRS资源映射类型；
    根据所述PDCCH DMRS资源映射类型，确定N个资源单元，所述N个资源单元为PDCCH DMRS映射到的资源单元，所述N为大于或等于1的正整数；
    在所述N个资源单元上接收信号；
    根据在所述N个资源单元上接收到的信号，对新空口NR PDCCH进行信道估计。
  2. 根据权利要求1所述的方法，其特征在于，所述NR PDCCH的时域资源包括第一符号和第二符号；
    所述N个资源单元包括与所述第一符号对应的M个资源单元、和与所述第二符号对应的M个资源单元，所述N＝2M，且所述M为正整数；
    其中，与第一符号对应的M个资源单元中K个资源单元与长期演进LTE小区特定参考信号CRS映射到的资源单元重叠；所述K为正整数。
  3. 根据权利要求2所述的方法，其特征在于，所述根据在所述N个资源单元上接收到的信号，对NR PDCCH进行信道估计，包括：
    根据在所述K个资源单元上接收到的LTE CRS、以及在所述N个资源单元中除所述K个资源单元以外的其它资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计；或者，
    根据在与所述第二符号对应的M个资源单元上接收到的PDCCH DMRS，对NR PDCCH进行信道估计。
  4. 根据权利要求1所述的方法，其特征在于，所述NR PDCCH的时域资源包括第一符号和第二符号；
    其中，所述N个资源单元与所述第二符号对应，所述第一符号对应的资源单元包括LTE CRS映射到的资源单元。
  5. 根据权利要求4所述的方法，其特征在于，所述第二符号对应的资源单元不包括LTE CRS映射到的资源单元。
  6. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    接收第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
  7. 根据权利要求1所述的方法，其特征在于，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
  8. 一种信道估计方法，其特征在于，包括：
    确定物理下行控制信道PDCCH解调参考信号DMRS的资源映射类型；
    向终端设备发送第一指示信息，所述第一指示信息用于指示PDCCH DMRS资源映射类型；所述PDCCH DMRS资源映射类型用于确定PDCCH DMRS映射到的资源单元。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    发送第二指示信息，所述第二指示信息用于指示所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元。
  10. 根据权利要求8所述的方法，其特征在于，所述PDCCH DMRS资源映射类型与所述PDCCH DMRS映射到的资源单元中用于信道估计的资源单元关联。
  11. 一种信道估计装置，其特征在于，包括：接收模块、确定模块和估计模块，其中，
    所述接收模块用于，接收第一指示信息，所述第一指示信息用于指示物理下行控制信道PDCCH解调参考信号DMRS资源映射类型；
    所述确定模块用于，根据所述PDCCH DMRS资源映射类型，确定N个资源单元，所述N个资源单元为PDCCH DMRS映射到的资源单元，所述N为大于或等于1的正整数；
    所述接收模块还用于，在所述N个资源单元上接收信号；
    所述估计模块用于，根据在所述N个资源单元上接收到的信号，对NR PDCCH进行信道估计。
  12. 一种信道估计装置，其特征在于，包括：确定模块和发送模块，其中，
    所述确定模块用于，确定物理下行控制信道PDCCH解调参考信号DMRS的资源映射类型；
    所述发送模块用于，向终端设备发送第一指示信息，所述第一指示信息 用于指示PDCCH DMRS资源映射类型；所述PDCCH DMRS资源映射类型用于确定PDCCH DMRS映射到的资源单元。
  13. 一种信道估计设备，其特征在于，包括：处理器，以及与所述处理器通信连接的存储器；
    所述存储器存储有计算机程序；
    所述处理器执行所述计算机程序，以实现如权利要求1至7中任一项所述的方法，或者，实现如权利要求8至10中任一项所述的方法。
  14. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时实现如权利要求1至7中任一项所述的方法，或者，实现如权利要求8至10中任一项所述的方法。
  15. 一种计算机程序产品，其特征在于，包括计算机程序，所述计算机程序被计算机执行时实现如权利要求1至7中任一项所述的方法，或者，实现如权利要求8至10中任一项所述的方法。
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