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WO2018126834A1 - Procédé et dispositif de transmission de signal de référence, et support de stockage - Google Patents

Procédé et dispositif de transmission de signal de référence, et support de stockage Download PDF

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Publication number
WO2018126834A1
WO2018126834A1 PCT/CN2017/114775 CN2017114775W WO2018126834A1 WO 2018126834 A1 WO2018126834 A1 WO 2018126834A1 CN 2017114775 W CN2017114775 W CN 2017114775W WO 2018126834 A1 WO2018126834 A1 WO 2018126834A1
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WO
WIPO (PCT)
Prior art keywords
reference signal
time
time domain
frequency
domain symbol
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PCT/CN2017/114775
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English (en)
Chinese (zh)
Inventor
贺海港
郝鹏
毕峰
刘星
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中兴通讯股份有限公司
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Publication of WO2018126834A1 publication Critical patent/WO2018126834A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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

Definitions

  • the present application relates to the field of communications, and in particular, to a method and device for transmitting a reference signal, and a storage medium.
  • the transmitting end can concentrate the transmitting energy in a certain direction to ensure that the receiving end can obtain a sufficiently strong signal energy, thereby achieving extended coverage and enhancement.
  • the purpose of signal reception quality is used to increase the reception quality of the signal to a certain extent, the reception quality of the signal is still not good due to the large attenuation of the high-frequency channel, especially for users who cover the edge of two or more base stations.
  • the channel attenuation is greater due to the greater distance from the base station, resulting in lower signal reception strength.
  • users at the edge of the base station tend to have more interference, resulting in poor reception quality of the signal.
  • the signal reception quality of the channel such as the physical broadcast channel (PBCH) needs to be further improved.
  • the embodiment of the present application provides a method and device for transmitting a reference signal, and a storage medium.
  • the embodiment of the present application provides a method for transmitting a reference signal, which is applied to a base station, and includes:
  • a reference signal is transmitted according to a time-frequency resource location of the reference signal.
  • the embodiment of the present application provides a method for transmitting a reference signal, which is applied to a terminal, and includes:
  • the reference signal relative to the anchor position Determining the time-frequency resource location of the reference signal by the number of domain resource element offsets, the number of time domain symbol offsets of the reference signal relative to the anchor position;
  • a reference signal is received according to a time-frequency resource location of the reference signal.
  • the embodiment of the present application provides a reference signal transmission apparatus, which is applied to a base station, and includes:
  • a first configuration module configured to pre-appoint an anchor position of the reference signal
  • a first determining module configured to determine a number of frequency domain resource element offsets of the reference signal relative to the anchor point location, and determine a number of time domain symbol offsets of the reference signal relative to the anchor point location; and, according to The pre-agreed anchor point position of the reference signal, the number of frequency domain resource element offsets of the reference signal relative to the anchor point position, and the number of time domain symbol offsets of the reference signal relative to the anchor point position Determining a time-frequency resource location of the reference signal;
  • the sending module is configured to transmit the reference signal according to the time-frequency resource location of the reference signal.
  • an embodiment of the present application provides a reference signal transmission apparatus, including: a processor and a memory, where the transmission apparatus is applied to a base station, where the memory stores computer executable instructions, and the computer executable instructions are The processor implements the following methods when executed:
  • a reference signal is transmitted according to a time-frequency resource location of the reference signal.
  • the embodiment of the present application provides a reference signal transmission apparatus, which is applied to a terminal, and includes:
  • a second configuration module configured to pre-appoint an anchor position of the reference signal
  • a second determining module configured to determine a number of frequency domain resource element offsets of the reference signal relative to the anchor point location, and determine a number of time domain symbol offsets of the reference signal relative to the anchor point location; and, according to The pre-agreed anchor point position of the reference signal, the number of frequency domain resource element offsets of the reference signal relative to the anchor point position, and the number of time domain symbol offsets of the reference signal relative to the anchor point position Determining a time-frequency resource location of the reference signal;
  • the receiving module is configured to receive the reference signal according to the time-frequency resource location of the reference signal.
  • an embodiment of the present application provides a reference signal transmission apparatus, including: a processor and a memory, where the transmission apparatus is applied to a terminal, the memory stores computer executable instructions, and the computer executable instructions are The processor implements the following methods when executed:
  • a reference signal is received according to a time-frequency resource location of the reference signal.
  • an embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are implemented to implement the foregoing method for transmitting a reference signal applied to a base station.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are implemented to implement the foregoing method for transmitting a reference signal applied to a terminal.
  • the additional resource overhead caused by the reference signals for channel demodulation can be reduced, so that the reception quality of the signals can be improved.
  • the reference signals of different ports sample different types of reference signals, or the same antenna port uses different types of reference signals in different time domain positions and/or different frequency domain positions, so that the reference signal can be reduced.
  • the additional resource overhead caused by the reference signal used for channel demodulation achieves the purpose of saving reference signal overhead, and allows the target data and/or control channel to use more resources for signal transmission, and can use lower modulation.
  • the encoding method improves the signal reception quality.
  • FIG. 1 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application
  • FIG. 2 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a time-frequency resource corresponding to an anchor point position of a reference signal according to Embodiment 1 of the present application;
  • FIG. 4 is a schematic diagram of time-frequency resources after a time domain offset and a frequency domain offset of a reference signal according to Embodiment 1 of the present application;
  • FIG. 5 is a schematic diagram of time-frequency resources corresponding to anchor positions of reference signals corresponding to the second and third embodiments of the present application;
  • FIG. 6 is a schematic diagram of time-frequency resources after a time domain offset and a frequency domain offset of a reference signal corresponding to the second and third embodiments of the present application;
  • FIG. 7 is a time-frequency resource corresponding to an anchor position of a reference signal corresponding to the third embodiment of the present application.
  • FIG. 8 is a schematic diagram of time-frequency resources after frequency domain offset of a reference signal corresponding to the third embodiment of the present application.
  • FIG. 9 is a schematic diagram of different types of signals corresponding to the fourth embodiment of the present application used as reference signals of different ports;
  • FIG. 10 is a schematic diagram of different types of signals corresponding to the fifth embodiment of the present application as reference signals of different ports;
  • FIG. 11 is a schematic diagram of reference signals of different types of signals corresponding to the same port used in Embodiment 6 of the present application;
  • FIG. 12 is a schematic structural diagram of a transmission apparatus of a reference signal applied to a base station according to an embodiment of the present application
  • FIG. 13 is a schematic structural diagram of a transmission apparatus of a reference signal applied to a terminal according to an embodiment of the present application.
  • the embodiment of the present application provides a method for transmitting a reference signal, which is applied to a base station, and includes:
  • Step 101 pre-arranging an anchor position of the reference signal
  • the time-frequency resource position in the anchor position of the reference signal is a fixed plurality of positions, and at least an anchor position of the reference signal is pre-agreed between the base station and the terminal to ensure the base station and the terminal.
  • the anchor position of the predefined reference signal can be known at the end.
  • Step 102 The base station determines a frequency domain resource element offset number of the reference signal relative to the anchor point position, and determines a number of time domain symbol offsets of the reference signal relative to the anchor point position;
  • Step 103 The base station determines the reference signal according to the pre-agreed reference signal anchor position, the frequency domain resource element offset of the reference signal relative to the anchor position, and the number of time domain symbol offsets of the reference signal relative to the anchor position.
  • Frequency resource location The base station determines the reference signal according to the pre-agreed reference signal anchor position, the frequency domain resource element offset of the reference signal relative to the anchor position, and the number of time domain symbol offsets of the reference signal relative to the anchor position.
  • Step 104 The base station transmits a reference signal according to a time-frequency resource location of the reference signal.
  • the reference signal is one of the following or a combination of any number:
  • CRS Cell-Specific Reference Signal
  • DMRS Downlink demodulation reference signal
  • PSS Primary synchronization signal
  • SSS Primary synchronization signal
  • the reference signal corresponding to the different port may be set to a multiplexing mode as follows: space division multiplexing, code division multiplexing, time division multiplexing, frequency division multiplexing , time division and frequency division multiplexing.
  • the target physical channel used for demodulation is one or more of the following: a physical downlink control channel (PDCCH), and a physical downlink shared channel (PDSCH). , a physical broadcast channel (PBCH), and a broadcast channel other than the physical broadcast channel.
  • the reference signal is used on the terminal side to demodulate a signal carried by the target physical channel.
  • the reference signal corresponding to the different ports may be configured to be the same type.
  • the method before the transmitting the reference signal, the method further includes: a reference corresponding to different ports
  • the signals are configured in different types.
  • the method before the transmitting the reference signal, the method further includes: the reference signals corresponding to the same port are configured to be the same type at different time-frequency resource locations.
  • the reference signal corresponding to the same port is configured to be of a different type at different time-frequency resource locations.
  • the determining the time-frequency resource location of the reference signal may include: according to the temporary identifier of the cell wireless network Determining the frequency domain resource element offset number v shift and a frequency domain location resource location k of the reference signal within a channel bandwidth or a target physical channel bandwidth range; wherein the frequency domain resource element offset number v shift is 0 or An integer not less than one.
  • the value of v shift is at least pre-agreed between the base station and the terminal, so that the base station and the terminal can obtain the value of the v shift .
  • the determining the time-frequency resource location of the reference signal may include: according to the temporary identifier of the cell wireless network Determining the number of shifts in the time domain symbol, ⁇ shift , and the time domain symbol position 1 of the reference signal within the time slot range or within the target physical channel time domain symbol range.
  • time domain symbol position 1 of the reference signal in the time slot range or the target physical channel time domain symbol range is determined by the following formula:
  • ⁇ is the time domain symbol position of the reference signal anchor position within the time slot range or the target physical channel time domain symbol range
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is an integer not less than 1 and a divisor of the number of time domain symbols for a time slot or target physical channel
  • the number of time domain symbol offsets of the reference signal, ⁇ shift, may be temporarily identified by a cell wireless network.
  • P are determined based on the following formula:
  • the time-domain symbol offset number ⁇ shift may be a pre-agreed fixed value, and the fixed value is 0 or an integer not less than 1.
  • the value of ⁇ shift is at least predetermined between the base station and the terminal, so that the base station and the terminal can obtain the value of the ⁇ shift .
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor point position, and determining the number of time domain symbol offsets of the reference signal relative to the anchor point position may include: the reference signal is different type When different types of reference signals use the same frequency domain resource element offset number and time domain symbol offset number.
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor point position, and determining the number of time domain symbol offsets of the reference signal relative to the anchor point position includes one or two of the following: 1) different The reference signals of the type use different frequency domain resource element offset numbers; 2) different types of the reference signals use different time domain symbol offset numbers.
  • the transmitting the reference signal may include: when the reference signal types corresponding to the same port are different, a part of the types of the reference signals are embedded in a time-frequency region where the target physical channel is located, and another part of the type is The reference signal is placed at a time-frequency resource location other than the time-frequency location where the target physical channel is located.
  • the transmitting reference signal may include: one of the different types of reference signals, where a part of the type of reference signals is located in a time domain position adjacent to a time domain of the target physical channel, and another partial type of reference signal The other side time domain location adjacent to the time domain of the target physical channel.
  • the transmitting reference signal may include: the different types of reference signals, some types of signals are embedded in a time-frequency region where the target physical channel is located, and another type of reference signal is placed in the target.
  • the time-frequency resource location other than the time-frequency location where the physical channel is located.
  • the transmitting the reference signal may include: when a port number is pre-agreed, the reference signal is transmitted by the port corresponding to the pre-agreed port number.
  • the method before the transmitting the reference signal, the method further includes: when a plurality of port numbers are pre-agreed, selecting one of the plurality of port numbers; the transmitting reference signal The number may include: transmitting the reference signal by using the port corresponding to the selected one of the number of ports.
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor position may include: adopting different frequency domain resource element number offset numbers for the multiple port numbers.
  • the determining the number of time domain symbol offsets of the reference signal relative to the anchor position may include: adopting different time domain symbol number offset numbers for the plurality of port numbers.
  • the embodiment of the present application provides a method for transmitting a reference signal, as shown in FIG. 2, which is applied to a terminal, and may include:
  • Step 201 pre-arranging an anchor position of the reference signal
  • Step 202 The terminal determines a frequency domain resource element offset number of the reference signal relative to the anchor point position, and determines a number of time domain symbol offsets of the reference signal relative to the anchor point position;
  • Step 203 The terminal determines the reference signal according to the pre-agreed reference signal anchor position, the frequency domain resource element offset of the reference signal relative to the anchor position, and the time domain symbol offset of the reference signal relative to the anchor position.
  • Frequency resource location
  • Step 204 The terminal receives a reference signal according to a time-frequency resource location of the reference signal.
  • the reference signal is one or a combination of any of the following: CRS, DMRS, PSS, SSS.
  • the method further includes: demodulating, by the reference signal, a signal carried by the target physical channel; where the target physical channel includes one or more of the following: PDCCH, PDSCH , other broadcast channels than PBCH and PBCH.
  • the method before the receiving the reference signal, the method further includes: configuring reference signals corresponding to different ports to be of the same type.
  • the method before the receiving the reference signal, the method further includes: configuring reference signals corresponding to different ports to be different types.
  • the method before the receiving the reference signal, the method further includes: corresponding to the same port
  • the reference signals are configured to the same type at different time-frequency resource locations.
  • the method before the receiving the reference signal, the method further includes: the reference signals corresponding to the same port are configured to be different types at different time-frequency resource locations.
  • the determining a time-frequency resource location of the reference signal includes: according to a cell wireless network temporary identifier Determining the frequency domain resource element offset number v shift and the frequency domain location resource location k of the reference signal within a channel bandwidth or a target physical channel bandwidth range; wherein the frequency domain resource element offset number is 0 or not less than An integer of 1.
  • the determining a time-frequency resource location of the reference signal includes: according to a cell wireless network temporary identifier Determining the number of shifts in the time domain symbol, ⁇ shift , and the time domain symbol position 1 of the reference signal within the time slot range or within the target physical channel time domain symbol range.
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal, P is an integer not less than 1 and is the time slot or the target physical channel time domain a divisor of the number of symbols;
  • the number of time domain symbol offsets of the reference signal, ⁇ shift, may be temporarily identified by a cell wireless network.
  • P are determined based on the following formula:
  • the time-domain symbol offset number ⁇ shift may be taken as a pre-agreed fixed value, and the fixed value is 0 or an integer not less than 1.
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor point location, and determining the number of time domain symbol offsets of the reference signal relative to the anchor point location including: the reference signal is of a different type When different types of reference signals use the same frequency domain resource element offset number and time domain symbol offset number.
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor position, and determining the number of time domain symbol offsets of the reference signal relative to the anchor position includes one or both of the following: 1) Different types of the reference signals use different frequency domain resource element offset numbers; 2) different types of the reference signals use different time domain symbol offset numbers.
  • the receiving the reference signal includes: when receiving the different types of reference signals by using the same port, part of the reference signals of the different types of reference signals are embedded in a time-frequency region where the target physical channel is located. Another part of the type of reference signal is placed at a time-frequency resource location other than the time-frequency location where the target physical channel is located.
  • the receiving the reference signal includes: when different types of reference signals are received by using different ports, part of the reference signals of the different types of reference signals are located in a time domain adjacent to the target physical channel. Position, another part of the type of reference signal is located at the other side time domain location adjacent to the time domain of the target physical channel.
  • the receiving the reference signal includes: when different types of reference signals are received by using different ports, part of the reference signals of the different types of reference signals are embedded in a time-frequency region where the target physical channel is located. Another part of the type of reference signal is placed at a time-frequency resource location other than the time-frequency location where the target physical channel is located.
  • the receiving the reference signal includes: when a port number is pre-agreed, the reference signal is received according to the pre-agreed number of ports.
  • the receiving the reference signal includes: when a plurality of port numbers are pre-agreed, channel estimation is performed on the reference signal according to the multiple port numbers, and the target is detected by using the channel estimation result.
  • the signal carried by the physical channel can detect the signal carried by the target physical channel under the number of ports, the reference signal is received by the port corresponding to the number of the port.
  • the signal carried by the target physical channel may be data or control signaling carried on the target physical channel, and the data or control signaling may be demodulated by the reference signal.
  • the determining the number of frequency domain resource element offsets of the reference signal relative to the anchor position comprises: employing different frequency domain resource element number offsets for the plurality of port numbers.
  • the determining the number of time domain symbol offsets of the reference signal relative to the anchor position comprises using a different number of time domain symbol number offsets for the plurality of port numbers.
  • the transmitting end can concentrate the transmitting energy in a certain direction, thereby ensuring that the receiving end can obtain a sufficiently strong signal energy, thereby achieving the purpose of expanding the coverage and enhancing the signal receiving quality.
  • the beam-forming technique is used to increase the reception quality of the signal to a certain extent, due to the large attenuation of the high-frequency channel, the reception quality of the signal is still not high, especially for users who cover the edge of two or more base stations.
  • the reference signal has only frequency domain offset technology and no time domain offset technique.
  • the mutual interference of reference signals between adjacent cells can be reduced to a greater extent by the time domain location offset technology of the reference signal, so that the reception quality of the signal can be improved.
  • the embodiment of the present application can reduce the additional resource overhead caused by the reference signal used for channel demodulation by referring to the signal.
  • different ports use the same type of reference signals (for example, using CRS as a reference signal), and reference signals of the same port are also used at different time-frequency resource locations.
  • the same type of reference signal for example, using CRS as a reference signal
  • different types of reference signals are sampled by reference signals of different ports, or different types of reference signals are used in different time domain positions and/or frequency domain positions of the same antenna port, so that the reference signal overhead can be saved.
  • the target data and/or control channel can use more resources for signal transmission, and can use a lower modulation coding method, thereby improving the signal.
  • the quality of reception can be used for example, using CRS as a reference signal.
  • this embodiment describes the time-frequency resource location corresponding to the anchor position of the reference signal.
  • the time-frequency resource position of the reference signal after the time domain and the frequency domain position offset is performed based on the anchor position of the reference signal is described.
  • the reference signal of the one antenna port is used for demodulation of the PBCH.
  • the time domain length of the reference signal of one antenna port is one time domain symbol.
  • the time domain length of the physical broadcast channel is two time domain symbol lengths.
  • the reference signal of one port is located in a time-frequency region within a time-frequency resource range in which the physical broadcast channel is located, but the signal carried by the physical broadcast channel does not overlap on the time-frequency resource.
  • the reference signal has only one type of reference signal, and the corresponding reference signal type is a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • the time domain symbol position in the slot range or the target physical channel time domain symbol range is calculated according to the cell radio network temporary identifier NIcDell according to the following formula (1):
  • ⁇ is the time domain symbol position of the anchor position of the reference signal in the time domain symbol range of the physical broadcast channel
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is a fixed value and the fixed value is not less than 1 An integer, and is a divisor of the number of time domain symbols for the physical broadcast channel.
  • the frequency domain location resource location k of the reference signal of the port in the frequency domain of the physical broadcast channel may be obtained by the following formula (2):
  • N is a fixed value, an integer not less than 1
  • v represents a frequency domain resource position of an anchor point position of the reference signal in a frequency domain of the physical broadcast channel
  • v shift represents a frequency domain resource element offset of the reference signal
  • Q is a fixed value and the fixed value is an integer not less than one, The bandwidth for the physical broadcast channel.
  • v shift can be temporarily identified by the cell wireless network And N determined, as shown in the following formula (3):
  • the base station After determining the time domain and the frequency domain resource location of the reference signal, the base station transmits the reference signal and the signal carried by the physical broadcast channel according to the time-frequency resource location of the reference signal, and the terminal side performs channel on the reference signal of each antenna port. Estimate, thereby obtaining an estimate of the channel.
  • the channel to be estimated here is the actual channel, or the equivalent channel including the precoding on the actual channel basis.
  • the terminal After obtaining the channel estimation result, the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • FIG. 5 it is a schematic diagram of a time-frequency resource location corresponding to an anchor position of a reference signal.
  • FIG. 6 it is a schematic diagram of a time-frequency resource position of a reference signal after time domain and frequency domain position offset based on an anchor position of a reference signal.
  • reference signals of two ports there are reference signals of two ports, and reference signals of the two ports are used for demodulation of the PBCH, respectively.
  • the time domain lengths of the reference signals of the two ports are all one time domain symbol.
  • the time domain length of the physical broadcast channel is two time domain symbol lengths.
  • the reference signals of the two ports are all located in the time-frequency region within the time-frequency resource range where the physical broadcast channel is located, but the signal carried by the physical broadcast channel does not overlap on the time-frequency resource.
  • the reference signal has only one type of reference signal, and the corresponding reference signal type is a demodulation reference signal (DMRS).
  • DMRS demodulation reference signal
  • the temporary identifier of the cell wireless network may be based on the following formula (4). Calculate the time domain symbol position of the reference signal of a port in the time slot range or the time domain symbol range of the target physical channel:
  • ⁇ is the time domain symbol position of the anchor position of the reference signal in the time domain symbol range of the physical broadcast channel
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is a fixed value, an integer not less than 1, and a divisor of the number of time domain symbols for the physical broadcast channel
  • the frequency domain location resource location k of the reference signal of the port in the frequency domain of the physical broadcast channel may be obtained by using the following formula (6):
  • N is a fixed value, an integer not less than 1
  • v represents a frequency domain resource position of an anchor point position of the reference signal in a frequency domain of the physical broadcast channel
  • v shift represents a frequency domain resource element offset of the reference signal
  • Q is a fixed value and the fixed value is an integer not less than one, The bandwidth for the physical broadcast channel.
  • v shift can be temporarily identified by the cell wireless network And N determined, as shown in the following formula (3):
  • the base station After determining the time domain and the frequency domain resource location of the reference signal, the base station transmits the reference signal and the signal carried by the physical broadcast channel according to the time-frequency resource location of the reference signal, and the terminal side performs channel on the reference signal of each antenna port. Estimate, thereby obtaining an estimate of the channel being used.
  • the channel to be estimated here is the actual channel, or the equivalent signal including the precoding based on the actual channel. Road.
  • the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • the base station can select different antenna port numbers.
  • the reference signal has a frequency domain position offset, and sometimes the domain position offset; when the number of antenna ports is 2, the reference signal only has a frequency domain offset. shift.
  • the number of antenna ports is not a fixed value
  • the base station may select one of the plurality of predefined antenna port numbers, and then transmit the reference signal and the signal carried by the physical broadcast channel.
  • the terminal performs channel estimation on the reference signal according to the predefined number of different antenna ports, and uses the channel estimation result to detect the signal carried by the physical broadcast channel. If the terminal can successfully detect the signal carried by the physical broadcast channel under a predefined number of reference signal ports, the terminal considers that the number of the predefined reference signal ports is the number of reference signal ports actually used by the base station.
  • FIG. 5 is a schematic diagram of a time-frequency resource location corresponding to an anchor position of a reference signal in the case where the antenna port is 1.
  • 6 is a schematic diagram of a time-frequency resource position after a frequency domain and a time domain offset of a reference signal relative to an anchor position in the case where the antenna port is 1.
  • 7 is a schematic diagram of a time-frequency resource location corresponding to an anchor position of a reference signal in the case where the antenna port is 2.
  • FIG. 8 is a schematic diagram showing the time-frequency resource position after the frequency domain and the time domain offset of the reference signal relative to the anchor position in the case where the antenna port is 2.
  • the number of ports selected by the base station is different, and the number of frequency domain position offsets and the number of time domain position offsets of the reference signal used may be different.
  • the reference signal After determining the ⁇ shift and the v shift , under the condition that the number of reference signal ports selected by the base station is determined, the reference signal is in the time slot range or the time domain symbol position in the range of the target physical channel time domain symbol, and the port The frequency domain location resource location k of the reference signal in the frequency domain of the physical broadcast channel.
  • the time domain symbol position l can be obtained by the following equation (12):
  • ⁇ is the time domain symbol position of the anchor position of the reference signal in the time domain symbol range of the physical broadcast channel
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is a fixed value, an integer not less than 1
  • the frequency domain location resource location k of the reference signal of the port in the frequency domain of the physical broadcast channel can be obtained by the following formula (13):
  • N is a fixed value, an integer not less than 1
  • v represents a frequency domain resource position of an anchor point position of the reference signal in a frequency domain of the physical broadcast channel
  • v shift represents a number of resource elements of the reference signal offset
  • Q is a fixed value
  • the fixed value is an integer not less than one, The bandwidth for the physical broadcast channel.
  • the base station After determining the time domain and the frequency domain resource location of the reference signal, the base station sends the reference signal and the signal carried by the physical broadcast channel according to the time-frequency resource location of the reference signal, and the terminal side performs channel estimation on the reference signal of each antenna port. , thereby obtaining an estimate of the channel being used.
  • the channel to be estimated here is the actual channel, or the equivalent channel including the precoding on the actual channel basis.
  • the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • the corresponding situation is: the reference signals of the two ports, the reference signal has no position offset in the time domain and the frequency domain (ie, the offset is 0), and the reference signals of different ports use different types of reference signals.
  • the reference signal type corresponding to the first antenna port is a secondary synchronization signal (SSS), and the reference signal type corresponding to the second antenna port is a demodulation reference signal (DMRS).
  • SSS secondary synchronization signal
  • DMRS demodulation reference signal
  • PBCH physical broadcast channel
  • the time domain lengths of the reference signals of the first antenna port and the second antenna port are all one time domain symbol.
  • the time domain length of the physical broadcast channel is also one time domain symbol length.
  • the reference signal corresponding to the first antenna port is located in a time-frequency region outside the time-frequency resource range where the physical broadcast channel is located, and the reference signal corresponding to the second antenna port is located in a time-frequency region within a time-frequency resource range where the physical broadcast channel is located. The area, but the signal carried by the physical broadcast channel does not overlap on the time-frequency resource.
  • the two antenna ports respectively use different types of reference signals, the first antenna port uses the primary synchronization signal as the reference signal, and the second antenna port uses the demodulation reference signal (DMRS) as the reference signal.
  • DMRS demodulation reference signal
  • the base station does not perform time domain and frequency domain offset on the reference signals of the antenna ports, that is, the anchor point position of the reference signal, and the number of frequency domain position offsets and the time domain position offset used are both Fixed value is 0.
  • the base station transmits the reference signal and the physical broadcast channel according to the reference signal position shown in FIG. After the signal is loaded, the terminal side performs channel estimation on the reference signal of each antenna port, thereby obtaining an estimated value of the channel.
  • the channel to be estimated here is the actual channel, or the equivalent channel including the precoding on the actual channel basis.
  • the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • the reference signals of the two ports have no time domain position offset and frequency domain position offset (ie, the offset number is 0), and the reference signals of different ports use different types of reference signals.
  • the reference signal type corresponding to the first antenna port is a primary synchronization signal (PSS), and the reference signal type corresponding to the second antenna port is a secondary synchronization signal (SSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the two reference signals are respectively located on both sides of the physical broadcast channel.
  • the reference signals of the two ports are respectively used for demodulation of a physical broadcast channel (PBCH).
  • PBCH physical broadcast channel
  • the reference signals of the two ports are respectively located on two sides of the physical broadcast channel.
  • the time domain lengths of the reference signals of the first antenna port and the second antenna port are all one time domain symbol.
  • the time domain length of the physical broadcast channel is also one time domain symbol length.
  • the reference signals corresponding to the two antenna ports are all located in a time-frequency region outside the time-frequency resource range where the physical broadcast channel is located.
  • the two antenna ports respectively use different types of reference signals, the first antenna port uses the primary synchronization signal as the reference signal, and the second antenna port uses the secondary synchronization signal as the reference signal.
  • the base station does not perform time domain and frequency domain offset on the reference signals of the antenna ports, that is, the anchor point position of the reference signal, and the number of frequency domain position offsets and the time domain position offset used are both Fixed value is 0.
  • the terminal side After the base station transmits the reference signal and the signal carried by the physical broadcast channel according to the reference signal position shown in FIG. 10, the terminal side performs channel estimation on the reference signal of each antenna port, thereby obtaining an estimated value of the channel.
  • the channel to be estimated here is the actual channel, or the actual channel basis.
  • the precoding equivalent channel is included.
  • the terminal After obtaining the channel estimation result, the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • the same port reference signal, part of the frequency domain position uses PSS or SSS as the reference signal, and the other frequency domain position uses DMRS as the reference signal.
  • the reference signals of the two ports have no time domain position offset and frequency domain position offset (ie, the number of offsets is 0).
  • different frequency domain locations use different reference signal types.
  • the partial frequency domain of the reference signal corresponding to the first antenna port uses PSS, and the remaining frequency domain locations use the corresponding reference signal type as DMRS.
  • PBCH physical broadcast channel
  • the time domain lengths of the reference signals of the first antenna port and the second antenna port are all one time domain symbol.
  • the time domain length of the physical broadcast channel is also one time domain symbol length.
  • a reference signal of each antenna port has a part of the reference signal located in a time-frequency region outside the time-frequency resource range where the physical broadcast channel is located, and a part of the reference signal is located in a time-frequency region within a time-frequency resource range in which the physical broadcast channel is located. For the reference signal in the time-frequency region falling within the time-frequency resource range in which the physical broadcast channel is located, the signal carried by the physical broadcast channel does not overlap on the time-frequency resource.
  • each antenna port consists of two types of reference signals.
  • a part of the frequency domain position uses the primary synchronization signal as a reference signal, and another part of the frequency domain position uses a demodulation reference signal (DMRS) as a reference signal.
  • DMRS demodulation reference signal
  • a part of the frequency domain position adopts SSS as a reference signal
  • another part of the frequency domain position uses a demodulation reference signal (DMRS) as a reference signal.
  • DMRS demodulation reference signal
  • the base station does not perform time domain offset and frequency domain offset on the reference signals of the antenna ports, that is, the anchor position of the reference signal, the number of frequency domain position offsets and the time domain position used.
  • the number of offsets is a fixed value of zero.
  • the terminal side After the base station transmits the reference signal and the signal carried by the physical broadcast channel according to the reference signal position shown in FIG. 11, the terminal side performs channel estimation on the reference signal of each antenna port, thereby obtaining an estimated value of the channel.
  • the channel to be estimated here is the actual channel, or the equivalent channel including the precoding on the actual channel basis.
  • the terminal After obtaining the channel estimation result, the terminal demodulates the signal carried by the physical broadcast channel by using the obtained channel information.
  • the embodiment of the present application further provides a reference signal transmission device, which is applied to a base station, as shown in FIG. 12, and may include:
  • the first configuration module 121 is configured to pre-appoint a reference signal anchor position
  • the first determining module 122 is configured to determine a frequency domain resource element offset number of the reference signal relative to the anchor point position, and determine a number of time domain symbol offsets of the reference signal relative to the anchor point position; and, according to the pre-agreed reference signal Determining the location of the anchor signal, the number of frequency domain resource elements offset of the reference signal relative to the anchor point position, and the number of time domain symbol offsets of the reference signal relative to the anchor point position, and determining the time-frequency resource location of the reference signal;
  • the sending module 123 is configured to transmit the reference signal according to the time-frequency resource location of the reference signal.
  • the sending module 123 may be configured to transmit a reference signal by using one or more ports.
  • the first configuration module 121 may be configured to respond when using multiple ports to transmit reference signals.
  • the reference signal of the port sets the same anchor position or sets a different anchor position corresponding to the reference signal of the different port.
  • the first configuration module 121 can be further configured to perform one of the following:
  • the reference signals corresponding to different ports are configured to be the same type
  • the reference signals corresponding to different ports are configured as different types
  • the reference signals corresponding to the same port are configured to be of the same type at different time-frequency resource locations;
  • the reference signals corresponding to the same port are configured to different types at different time-frequency resource locations.
  • the first determining module 122 is specifically configured to determine a time-frequency resource location of the reference signal by: a temporary identifier of the cell wireless network. Determining the number of shifts in the time domain symbol, ⁇ shift , and the time domain symbol position 1 of the reference signal within the time slot range or within the target physical channel time domain symbol range.
  • the first determining module 122 is specifically configured to determine the time domain symbol position 1 by:
  • the time domain symbol position 1 of the reference signal within the time slot range or within the target physical channel time domain symbol range is determined by the following equation:
  • ⁇ is the time domain symbol position of the reference signal anchor position within the time slot range or the target physical channel time domain symbol range
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is an integer not less than 1 and a divisor of the number of time domain symbols for a time slot or target physical channel
  • said reference signal is time-domain symbol ⁇ shift offset number by a cell radio network temporary identity
  • P determines:
  • the time-domain symbol offset number ⁇ shift is a predetermined fixed value, and the fixed value is 0 or an integer not less than 1.
  • the first determining module 122 is specifically configured to determine, by using one or a combination of the following two, a frequency domain resource element offset of the reference signal relative to the anchor position, and a reference signal relative to the anchor position. Number of time domain symbol offsets:
  • reference signals When the reference signals are of different types, different types of reference signals use the same frequency domain resource element offset number and time domain symbol offset number;
  • the sending module 123 is specifically configured to transmit a reference signal, including one of the following:
  • a part of the type of the reference signal is embedded in a time-frequency region in which the target physical channel is located, and another part of the reference signal is placed outside the time-frequency location where the target physical channel is located.
  • some types of reference signals are located in one time domain position adjacent to the time domain of the target physical channel, and another partial type of reference signal is located on the other side adjacent to the time domain of the target physical channel. Time domain location.
  • the sending module 123 is specifically configured to transmit the reference signal by one of the following methods:
  • the reference signal is transmitted through the port corresponding to the pre-agreed number of ports;
  • one of the plurality of port numbers is selected, and the reference signal is transmitted by the port corresponding to the selected one of the port numbers.
  • another transmission device for a reference signal comprising: a processor and a memory, the transmission device being applied to a base station, the memory storing computer executable instructions, the computer executable instructions being executed by the processor
  • a reference signal is transmitted according to a time-frequency resource location of the reference signal.
  • the embodiment of the present application further provides a reference signal transmission apparatus, and an application thereof.
  • a reference signal transmission apparatus including:
  • the second configuration module 131 is configured to pre-appoint a reference signal anchor position
  • a second determining module 132 configured to determine a frequency domain resource element offset number of the reference signal relative to the anchor point position, and determine a number of time domain symbol offsets of the reference signal relative to the anchor point position; and, according to the pre-agreed reference signal Determining the location of the anchor signal, the number of frequency domain resource elements offset of the reference signal relative to the anchor point position, and the number of time domain symbol offsets of the reference signal relative to the anchor point position, and determining the time-frequency resource location of the reference signal;
  • the receiving module 133 is configured to receive the reference signal according to the time-frequency resource location of the reference signal.
  • the second configuration module 131 can be further configured to perform one of the following:
  • the reference signals corresponding to different ports are configured to be the same type
  • the reference signals corresponding to different ports are configured as different types
  • the reference signals corresponding to the same port are configured to be of the same type at different time-frequency resource locations;
  • the reference signals corresponding to the same port are configured to different types at different time-frequency resource locations.
  • the second determining module 132 is specifically configured to determine a time-frequency resource location of the reference signal by using a temporary identifier of the cell wireless network. Determining the number of shifts in the time domain symbol, ⁇ shift , and the time domain symbol position 1 of the reference signal within the time slot range or within the target physical channel time domain symbol range.
  • the second determining module 132 is specifically configured to determine the time domain symbol position 1 by:
  • ⁇ is the time domain symbol position of the anchor position of the reference signal within the time slot range or the target physical channel time domain symbol range
  • ⁇ shift represents the number of time domain symbol offsets of the reference signal
  • P is an integer not less than 1
  • P is an integer not less than 1
  • P is an integer not less than 1
  • P is an integer not less than 1
  • P is an integer not less than 1
  • P is an integer not less than 1
  • P is a divisor of the number of time domain symbols of the time slot or the target physical channel
  • said reference signal is time-domain symbol ⁇ shift offset number by a cell radio network temporary identity
  • P determines:
  • the time-domain symbol offset number ⁇ shift is a predetermined fixed value, and the fixed value is 0 or an integer not less than 1.
  • the second determining module 132 is specifically configured to determine a frequency domain resource element offset of the reference signal relative to the anchor position by using one or a combination of the following two, and determine the reference signal relative to the anchor point. Number of time domain symbol offsets for the location:
  • reference signals When the reference signals are of different types, different types of reference signals use the same frequency domain resource element offset number and time domain symbol offset number;
  • the receiving module 133 can be configured to receive a reference signal, including one of the following:
  • some of the reference signals of the different types of reference signals are embedded in the time-frequency region where the target physical channel is located, and another part of the reference signal is placed on the target physical channel.
  • some of the reference signals of the different types of reference signals are located in a time domain position adjacent to the time domain of the target physical channel, and another part of the reference signal is located in the time domain of the target physical channel.
  • some of the reference signals of the different types of reference signals are embedded in the time-frequency region where the target physical channel is located, and another part of the reference signal is placed on the target physical channel.
  • the receiving module 133 is specifically configured to receive the reference signal by one of the following methods:
  • the reference signal is received according to the pre-agreed number of ports;
  • channel estimation is performed on the reference signals according to the plurality of port numbers, and the signal carried by the target physical channel is detected by using the channel estimation result, and can be detected under a port number.
  • the reference signal is received by the port corresponding to the number of the ports.
  • another transmission device for a reference signal comprising: a processor and a memory, the transmission device being applied to a terminal, the memory storing computer executable instructions, the computer executable instructions being executed by the processor
  • a reference signal is received according to a time-frequency resource location of the reference signal.
  • the embodiment of the present application further provides a computer readable storage medium storing computer executable instructions, where the computer executable instructions are implemented to implement the foregoing method for transmitting a reference signal applied to a base station.
  • the embodiment of the present application further provides a computer readable storage medium, where computer executable instructions are stored, and when the computer executable instructions are executed, the foregoing method for transmitting a reference signal applied to a terminal is implemented.
  • the foregoing storage medium may include, but is not limited to, a U disk, a read only memory. (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), removable hard disk, disk or optical disk, and other media that can store program code.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • removable hard disk disk or optical disk, and other media that can store program code.
  • the processor executes the method steps of the above embodiments in accordance with program code already stored in the storage medium.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the embodiment of the present application by using the time domain position offset of the reference signal, mutual interference of reference signals between adjacent cells can be reduced to a greater extent, and the reference signal is optimized, thereby improving the reference signal and the signal of the corresponding target physical channel.
  • the quality of reception has improved the quality of signal reception.

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Abstract

La présente invention concerne un procédé et un dispositif de transmission de signal de référence, et un support de stockage. Le procédé peut consister à : prédéterminer une position de point d'ancrage d'un signal de référence ; déterminer le nombre de décalages d'éléments de ressource dans le domaine fréquentiel du signal de référence par rapport à la position de point d'ancrage, et déterminer le nombre de décalages de symboles dans le domaine temporel du signal de référence par rapport à la position de point d'ancrage ; déterminer une position de ressource temps-fréquence du signal de référence d'après la position de point d'ancrage prédéterminée du signal de référence, le nombre de décalages d'éléments de ressource dans le domaine fréquentiel du signal de référence par rapport à la position de point d'ancrage, et le nombre de décalages de symboles dans le domaine temporel du signal de référence par rapport à la position de point d'ancrage ; et transmettre le signal de référence d'après la position de ressource temps-fréquence du signal de référence.
PCT/CN2017/114775 2017-01-06 2017-12-06 Procédé et dispositif de transmission de signal de référence, et support de stockage WO2018126834A1 (fr)

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CN201710011247.7A CN108282300A (zh) 2017-01-06 2017-01-06 一种参考信号的传输方法及装置

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US11811508B2 (en) * 2018-08-09 2023-11-07 Ntt Docomo, Inc. Method and device for transmitting reference signals
CN112511987B (zh) * 2020-03-05 2024-04-26 中兴通讯股份有限公司 无线传输方法和装置、信息确定方法和装置、电子设备

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US20120176939A1 (en) * 2011-01-07 2012-07-12 Futurewei Technologies, Inc. Reference Signal Transmission and Reception Method and Equipment
CN102647790A (zh) * 2011-02-18 2012-08-22 华为技术有限公司 参考信号的发送、接收方法及装置
WO2016008101A1 (fr) * 2014-07-15 2016-01-21 华为技术有限公司 Appareil et procédé pour envoyer un signal de référence
CN105406951A (zh) * 2014-09-09 2016-03-16 上海贝尔股份有限公司 一种参考信号配置方法

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US20120176939A1 (en) * 2011-01-07 2012-07-12 Futurewei Technologies, Inc. Reference Signal Transmission and Reception Method and Equipment
CN102647790A (zh) * 2011-02-18 2012-08-22 华为技术有限公司 参考信号的发送、接收方法及装置
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CN105406951A (zh) * 2014-09-09 2016-03-16 上海贝尔股份有限公司 一种参考信号配置方法

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