WO2020233370A1 - Procédé et dispositif de communication - Google Patents

Procédé et dispositif de communication Download PDF

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Publication number
WO2020233370A1
WO2020233370A1 PCT/CN2020/087636 CN2020087636W WO2020233370A1 WO 2020233370 A1 WO2020233370 A1 WO 2020233370A1 CN 2020087636 W CN2020087636 W CN 2020087636W WO 2020233370 A1 WO2020233370 A1 WO 2020233370A1
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WIPO (PCT)
Prior art keywords
reference signal
dci
terminal device
field
time slot
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PCT/CN2020/087636
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English (en)
Chinese (zh)
Inventor
费永强
谢信乾
郭志恒
程型清
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华为技术有限公司
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Publication of WO2020233370A1 publication Critical patent/WO2020233370A1/fr

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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
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals

Definitions

  • This application relates to the field of communication technology, and in particular to a communication method and device.
  • a wireless communication system such as a new radio (NR) communication system
  • information exchanged between a terminal device and a base station is carried through a physical channel.
  • the uplink data sent by the terminal device is usually carried by a physical uplink shared channel (PUSCH);
  • the uplink control information sent by the terminal device is usually carried by a physical uplink control channel (PUCCH).
  • the terminal device can also send a reference signal, and the base station can estimate the channel response or channel quality of the terminal device on different frequencies by receiving the reference signal from the terminal device.
  • the terminal device sends the reference signal and the uplink data together, so the terminal device can only send the reference signal when there is uplink data to send.
  • a terminal device is in a deep coverage area such as a basement or cell edge, the wireless signal sent by the terminal device will become very weak when it reaches the base station.
  • the base station needs to send more reference signals through the terminal device to perform more accurate channel estimation.
  • the uplink data sent by the terminal equipment to the base station is generally not too much, resulting in the base station not being able to obtain sufficient reference signals, and the base station estimates the uplink channel of the terminal equipment based on fewer reference signals, which may make the estimation result insufficient. accurate.
  • the base station's estimation of the uplink channel of the terminal device is not accurate enough, it will affect the demodulation of the uplink data, etc., which may cause the base station to fail to correctly obtain the uplink data sent by the terminal device. Therefore, how to improve the accuracy of the uplink channel estimation of the terminal equipment by the base station is a problem that needs to be solved at present.
  • the embodiments of the present application provide a communication method and device, which are used to improve the accuracy of uplink channel estimation of a terminal device by a network device.
  • a first communication method includes: sending a DCI to a terminal device, where the DCI is only used to instruct the terminal device to send a first reference signal; and receiving an instruction from the terminal device through the DCI The first reference signal.
  • the method may be executed by a first communication device, and the first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system.
  • the communication device is a network device.
  • the network device may only instruct the transmission of the first reference signal through DCI. After receiving the DCI, the terminal device may transmit the first reference signal to the network device. Therefore, the first reference signal does not need to be sent with the data.
  • the terminal device can send the first reference signal to the network device separately, which improves the flexibility of sending the first reference signal. And because the transmission of the first reference signal is more flexible, the terminal device can send the first reference signal to the network device multiple times, and the network device can also receive the first reference signal from the terminal device multiple times, thereby enhancing the first reference signal.
  • the coverage of network equipment improves the accuracy of channel estimation for terminal equipment.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the DCI can only instruct the terminal device to send the first reference signal through the included first field, and the other fields included in the DCI can also indicate other information, which can improve the utilization of the DCI.
  • the first field can use one value to make DCI only instruct the terminal device to send the first reference signal, so other values of the first field can also indicate other content, or DCI can also use multiple values (first range) In this way, the DCI only instructs the terminal device to send the first reference signal, which helps improve the fault tolerance mechanism of the terminal device.
  • the first field is an MCS field.
  • the embodiments of the present application can use these states to make the DCI only instruct the terminal device to send the first reference signal.
  • the invalid state of the MCS field is used to improve the utilization of the field, and there is no need to add a new field in the DCI, which can avoid the performance degradation caused by changing the format of the DCI.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the above values are values corresponding to several invalid states of the MCS field, so the first range may include at least two of the above values, so as to utilize the invalid state of the MCS field.
  • the first value is 11100, 11101, 11110, or 11111.
  • the above values are the values corresponding to several invalid states of the MCS field, so the first value can be one of the above values, so as to utilize the invalid state of the MCS field.
  • different values of the first field correspond to different initial phase determination methods, which are used on the time domain symbols for sending the first reference signal,
  • the method for determining the initial phase of the sequence of the first reference signal carried corresponds to the value of the first field.
  • the value of the first field may not only instruct the terminal device to send the first reference signal, but may also indicate the method for determining the initial phase of the sequence of the first reference signal, so that the meaning indicated by the first field is richer.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots is The initial phases are the same or different.
  • the initial phases of the sequences are the same, it can be considered that the two sequences are the same. Then, by making the initial phases of the sequences on different OFDM symbols the same, the sequences carried by different OFDM symbols can be made the same, and by making the sequences on different OFDM symbols the same. The initial phase of the sequence is different, which can make the sequence carried by different OFDM symbols different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the first time slot may be a predefined time slot.
  • the first time slot is predefined as the first time slot of at least two time slots, or the last time slot of at least two time slots, or at least two time slots.
  • the time slots other than the first time slot and the last time slot among the time slots can be specifically specified by the protocol or configured by the network equipment.
  • the first time domain symbol may be a predefined time domain symbol, for example, the first time domain symbol is predefined as the first time domain symbol in the first time slot, or the last time domain symbol in the first time slot, or It is the first time domain symbol used to carry the sequence of the first reference signal in the first time slot, or it can be any time domain symbol in the first time slot, etc., which can be pre-defined by the protocol.
  • the sequence of the first reference signal carried by the time domain symbols in the at least two time slots used for transmitting the first reference signal is the same. Therefore, if this initial phase determination method is adopted, the sequence of the first reference signal carried by the time domain symbol where the first reference signal is transmitted can be made the same. Then the network device may combine the sequences of the first reference signal carried by the four time domain symbols of time slot 0 and time slot 1, and then perform channel estimation based on the combined signal. This channel estimation method helps reduce noise and improve the accuracy of channel estimation.
  • the initial phases of the first reference signal sequence carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the first time domain symbol may be a predefined time domain symbol.
  • the first time domain symbol is predefined as the first time domain symbol in the time slot, or the last time domain symbol in the time slot, or the time domain symbol in the time slot.
  • the first time domain symbol of the sequence used to carry the first reference signal, or any time domain symbol in the time slot, etc. can be specifically pre-defined by a protocol or configured by a network device. Because the "first time slot" in this initial phase determination method can be any one of the at least two time slots, the first time domain symbol may not be "predefined” for a certain time slot. It is applicable to all time slots.
  • the first time domain symbol is the first time domain symbol in the time slot
  • the first time domain symbol is the first time domain symbol in time slot
  • the first time domain symbol is The time slot is time slot 1
  • the first time domain symbol is the first time domain symbol in time slot 1.
  • the network device may combine the sequences of the first reference signal carried by the two time domain symbols of time slot 0, perform channel estimation based on the combined signal, and combine the first reference signal carried by the two time domain symbols of time slot 1
  • the signal sequences are combined, the channel estimation is performed based on the combined signal, and the two channel estimation results are combined.
  • This channel estimation method helps reduce noise and improve the accuracy of channel estimation.
  • the DCI further includes one or more of a time domain resource allocation resource field, a frequency domain resource allocation resource field, or a transmission power control command field, where ,
  • the time domain resource allocation field is used to indicate the time domain resources occupied by the first reference signal
  • the frequency domain resource allocation field is used to indicate the frequency domain resource occupied by the first reference signal
  • the transmission power control command field is used to indicate the transmission power of the first reference signal.
  • the time-domain resource allocation resource field, the frequency-domain resource allocation resource field, and the transmission power control command field were originally used to indicate the time-frequency resources and transmission power of the PUSCH scheduled by DCI.
  • the embodiments of this application may use these fields to indicate the first reference. Signal time-frequency resources and transmission power, thereby improving the utilization of these fields.
  • the method further includes: sending RRC signaling to the terminal device, where the RRC signaling is used to indicate that the first reference signal is occupied One or more of the time domain resources, frequency domain resources, and transmit power.
  • the time-frequency resource or transmission power of the first reference signal can also be configured semi-statically through RRC signaling instead of being indicated by DCI, so that DCI does not need to indicate too much information, and the terminal device only needs to be configured according to RRC signaling It is sufficient to send the first reference signal.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a second communication method includes: receiving downlink control information DCI, where the DCI is only used to instruct a terminal device to send a first reference signal; and the terminal device sends the first reference signal according to the DCI signal.
  • the method may be executed by a second communication device, and the second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system.
  • the communication device is a terminal device.
  • the DCI is not used for scheduling data.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods
  • the method further includes: according to the value of the first field Determine, a method for determining the initial phase of the sequence of the first reference signal carried on the time domain symbol for sending the first reference signal.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots is The initial phases are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the sequence of the first reference signal carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the method further includes one or any combination of the following:
  • the method further includes: receiving RRC signaling from the network device, and determining the location of the first reference signal according to the RRC signaling.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a first communication device is provided, for example, the communication device is the first communication device as described above.
  • the communication device is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect.
  • the communication device may include a module for executing the method in the first aspect or any possible implementation of the first aspect, for example, including a processing module and a transceiver module.
  • the communication device is a communication device.
  • the communication device is a network device. among them,
  • the processing module is configured to determine DCI, and the DCI is only used to instruct the terminal device to send the first reference signal;
  • the transceiver module is configured to send the DCI to a terminal device, and the DCI is only used to instruct the terminal device to send a first reference signal;
  • the transceiver module is further configured to receive the first reference signal indicated by the DCI from the terminal device.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods, which are used on the time domain symbols for sending the first reference signal,
  • the method for determining the initial phase of the sequence of the first reference signal carried corresponds to the value of the first field.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots is The initial phases are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequence carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the DCI further includes one or more of a time domain resource allocation resource field, a frequency domain resource allocation resource field, or a transmission power control command field, where ,
  • the time domain resource allocation field is used to indicate the time domain resources occupied by the first reference signal
  • the frequency domain resource allocation field is used to indicate the frequency domain resource occupied by the first reference signal
  • the transmission power control command field is used to indicate the transmission power of the first reference signal.
  • the transceiver module is further configured to send RRC signaling to the terminal device, and the RRC signaling is used to indicate the first reference signal One or more of the occupied time domain resources, frequency domain resources, and transmission power.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a second communication device is provided, for example, the communication device is the first communication device as described above.
  • the communication device is configured to execute the foregoing second aspect or any possible implementation method of the second aspect.
  • the communication device may include a module for executing the method in the second aspect or any possible implementation of the second aspect, for example, including a processing module and a transceiver module.
  • the communication device is a communication device.
  • the communication device is a terminal device. among them,
  • the transceiver module is configured to receive DCI, and the DCI is only used to instruct the terminal device to send the first reference signal;
  • the processing module is configured to determine that the DCI only instructs a terminal device to send a first reference signal
  • the transceiver module is further configured to send the first reference signal according to the DCI.
  • the DCI is not used for scheduling data.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods
  • the processing module is configured to determine the initial phase according to the value of the first field.
  • the value determination is used to determine the initial phase of the sequence of the first reference signal carried on the time domain symbol for sending the first reference signal.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots is The initial phases are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequence carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the processing module is further configured to perform one or any combination of the following:
  • the transceiver module is further configured to receive RRC signaling from the network device, and determine the first reference according to the RRC signaling One or more of time domain resources, frequency domain resources, and transmission power occupied by the signal.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a third communication device is provided.
  • the communication device is, for example, the first communication device as described above.
  • the communication device includes a processor and a transceiver, and the processor and the transceiver are coupled with each other to implement the method described in the first aspect or various possible designs of the first aspect.
  • the communication device is a chip provided in a communication device.
  • the communication device is a network device.
  • the transceiver is realized by, for example, an antenna, a feeder, a codec in the communication device, or, if the communication device is a chip set in the communication device, the transceiver is, for example, a communication interface in the chip. It is connected with the radio frequency transceiving component in the communication equipment to realize the information transmission and reception through the radio frequency transceiving component. among them,
  • the processor is configured to determine DCI, where the DCI is only used to instruct the terminal device to send the first reference signal;
  • the transceiver is configured to send the DCI to a terminal device, and the DCI is only used to instruct the terminal device to send a first reference signal;
  • the transceiver is further configured to receive the first reference signal indicated by the DCI from the terminal device.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods, which are used on the time domain symbols for sending the first reference signal,
  • the method for determining the initial phase of the sequence of the first reference signal carried corresponds to the value of the first field.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots is The initial phases are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequence carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the DCI further includes one or more of a time domain resource allocation resource field, a frequency domain resource allocation resource field, or a transmission power control command field, where ,
  • the time domain resource allocation field is used to indicate the time domain resources occupied by the first reference signal
  • the frequency domain resource allocation field is used to indicate the frequency domain resource occupied by the first reference signal
  • the transmission power control command field is used to indicate the transmission power of the first reference signal.
  • the transceiver is further configured to send RRC signaling to the terminal device, and the RRC signaling is used to indicate the first reference signal One or more of the occupied time domain resources, frequency domain resources, and transmission power.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a fourth communication device is provided.
  • the communication device is, for example, the fourth communication device as described above.
  • the communication device includes a processor and a transceiver, and the processor and the transceiver are coupled with each other to implement the method described in the foregoing second aspect or various possible designs of the second aspect.
  • the communication device is a chip provided in a communication device.
  • the communication device is a terminal device.
  • the transceiver is realized by, for example, an antenna, a feeder, a codec in the communication device, or, if the communication device is a chip set in the communication device, the transceiver is, for example, a communication interface in the chip. It is connected with the radio frequency transceiving component in the communication equipment to realize the information transmission and reception through the radio frequency transceiving component. among them,
  • the transceiver is configured to receive DCI, and the DCI is only used to instruct a terminal device to send a first reference signal;
  • the processor is configured to determine that the DCI only instructs a terminal device to send a first reference signal
  • the transceiver is further configured to send the first reference signal according to the DCI.
  • the DCI is not used for scheduling data.
  • the DCI includes a first field;
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values: 11100, 11101, 11110, or 11111.
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination modes
  • the processor is configured to determine the initial phase according to the value of the first field.
  • the value determination is used to determine the initial phase of the sequence of the first reference signal carried on the time domain symbol for sending the first reference signal.
  • the first reference signal is carried in at least two time slots, and the sequence of the first reference signal carried in the at least two time slots
  • the initial phases are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes: according to the at least The index of the first time slot in the two time slots and the index of the first time domain symbol in the first time slot determine the initial sequence of the first reference signal in the at least two time slots Phase, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequence carried by the at least two time slots are different, and the determining manner includes: according to the at least The index of the first time slot of the two time slots and the index of the first time domain symbol in the first time slot determine the initial phase of the sequence of the first reference signal in the first time slot .
  • the processor is further configured to execute one or any combination of the following:
  • the transceiver is further configured to receive RRC signaling from the network device, and determine the first reference according to the RRC signaling One or more of time domain resources, frequency domain resources, and transmission power occupied by the signal.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • a fifth communication device is provided.
  • the communication device may be the first communication device in the above method design.
  • the communication device is a chip provided in a communication device.
  • the communication device is a network device.
  • the communication device includes: a memory for storing computer executable program codes; and a processor, which is coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the fifth communication device is caused to execute the foregoing first aspect or the method in any one of the possible implementation manners of the first aspect.
  • the fifth type of communication device may also include a communication interface, and the communication interface may be a transceiver in a network device, for example, implemented by the antenna, feeder, and codec in the communication device, or if the fifth type of communication
  • the device is a chip set in a network device, and the communication interface may be an input/output interface of the chip, such as input/output pins.
  • a sixth communication device is provided.
  • the communication device may be the second communication device in the above method design.
  • the communication device is a chip provided in a communication device.
  • the communication device is a terminal device.
  • the communication device includes: a memory for storing computer executable program codes; and a processor, which is coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the sixth communication device executes the second aspect or the method in any one of the possible implementation manners of the second aspect.
  • the sixth communication device may also include a communication interface, and the communication interface may be a transceiver in a terminal device, for example, implemented by the antenna, feeder, and codec in the communication device, or if the sixth communication
  • the device is a chip set in a terminal device, and the communication interface may be an input/output interface of the chip, such as input/output pins.
  • a communication system which may include the first communication device described in the third aspect, the third communication device described in the fifth aspect, or the fifth communication device described in the seventh aspect , And including the second communication device described in the fourth aspect, the fourth communication device described in the sixth aspect, or the sixth communication device described in the eighth aspect.
  • a computer storage medium stores instructions, which when run on a computer, cause the computer to execute the first aspect or any one of the possible designs of the first aspect The method described.
  • a computer storage medium stores instructions that, when run on a computer, cause the computer to execute the second aspect or any one of the possible designs of the second aspect. The method described in.
  • a computer program product containing instructions.
  • the computer program product stores instructions that, when run on a computer, cause the computer to execute the first aspect or any one of the first aspects described above. The method described in the design.
  • a computer program product containing instructions.
  • the computer program product stores instructions that, when run on a computer, cause the computer to execute the second aspect or any one of the possibilities of the second aspect. The method described in the design.
  • the first reference signal does not need to be sent together with the data, so when the network device has a demand, the terminal device can send the first reference signal to the network device separately, which improves the flexibility of sending the first reference signal. And because the transmission of the first reference signal is more flexible, the terminal device can send the first reference signal to the network device multiple times, and the network device can also receive the first reference signal from the terminal device multiple times, thereby enhancing the first reference signal.
  • the coverage of network equipment improves the accuracy of channel estimation for terminal equipment.
  • Fig. 1 is a schematic diagram of a terminal device occupying one OFDM symbol in a time slot to send a DMRS;
  • Figure 2 is a schematic diagram of an application scenario of an embodiment of the application
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of this application.
  • Figure 4 is a schematic diagram of DMRS sequences carried by two time slots
  • FIG. 5 is a schematic diagram of the same sequence of first reference signals carried in a time slot in an embodiment of the application
  • FIG. 6 is a schematic diagram of the same sequence of first reference signals carried in multiple time slots in an embodiment of the application.
  • FIG. 7 is a schematic diagram of a terminal device making a decision according to DCI in an embodiment of this application.
  • FIG. 8 is a schematic diagram of a terminal device sending a PUSCH or a first reference signal according to the scheduling of DCI in an embodiment of the application;
  • FIG. 9 is a schematic block diagram of a terminal device provided by an embodiment of the application.
  • FIG. 10 is another schematic block diagram of a terminal device according to an embodiment of the application.
  • FIG. 11 is a schematic block diagram of a network device provided by an embodiment of this application.
  • FIG. 12 is another schematic block diagram of a network device provided by an embodiment of this application.
  • FIG. 13 is a schematic block diagram of a communication device provided by an embodiment of the application.
  • FIG. 14 is another schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 15 is still another schematic block diagram of the communication device provided by an embodiment of the application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems.
  • the terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle-to-everything (V2X) Terminal equipment, machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal) , User agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • UE user equipment
  • V2X vehicle-to-everything
  • M2M/MTC machine-to-machine/machine-type communications
  • IoT Internet of things
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • remote station remote station
  • access point access point
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, and computer-built mobile devices.
  • PCS personal communication service
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • the wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • vehicle-mounted terminal equipment for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU).
  • OBU on-board unit
  • Network equipment such as access network (AN) equipment, such as a base station (e.g., access point), may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • base station e.g., access point
  • IP Internet Protocol
  • the base station can be used to convert the received air frame and Internet Protocol (IP) packets to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network.
  • IP Internet Protocol
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the access network equipment can also coordinate the attribute management of the air interface.
  • the access network equipment may include a long-term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution-advanced (LTE-A) system. ), or it may also include the next generation node B (gNB) in the fifth generation mobile communication technology (the 5th generation, 5G) NR system, or it may also include the cloud radio access network (Cloud access network).
  • LTE long-term evolution
  • NodeB or eNB or e-NodeB, evolutional NodeB evolutional NodeB
  • LTE-A long term evolution-advanced
  • gNB next generation node B
  • 5G fifth generation
  • 5G fifth generation
  • Cloud access network cloud access network
  • the network equipment may also include core network equipment, but because the technical solutions provided by the embodiments of this application mainly involve access network equipment, in the following text, unless otherwise specified, the “network equipment” described below is all Refers to the access network equipment.
  • At least one means one or more, and "plurality” means two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character "/” generally indicates that the associated objects are in an "or” relationship.
  • "The following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • first and second are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance.
  • first information and the second information are only for distinguishing different signaling, but do not indicate the difference in content, priority, sending order, or importance of the two types of information.
  • the uplink data sent by the terminal equipment is usually carried by the PUSCH; the uplink control information sent by the terminal equipment is usually carried by the PUCCH.
  • the terminal device can also send a reference signal, and the base station can estimate the channel response or channel quality of the terminal device on different frequencies by receiving the reference signal from the terminal device.
  • the path loss of wireless signal propagation is very serious.
  • coverage enhancement methods need to be considered, which is particularly important for uplink transmission.
  • the transmission power of terminal equipment is often low, such as 23dBm, which is much lower than the transmission power of the base station (for example, a base station with a bandwidth of 20MHz, its typical transmission power is 46dBm), which will lead to terminal equipment transmission in deep coverage scenarios When the signal reaches the base station, it is very weak.
  • the base station needs to estimate the uplink channel of the terminal equipment based on the reference signal from the terminal equipment.
  • the base station cannot receive the reference signal from the terminal equipment, or the strength of the received reference signal from the terminal equipment is weak, it may cause the base station to fail.
  • the channel estimation result is not accurate. If the channel estimation result of the base station is inaccurate, it will seriously affect the demodulation of the uplink data from the terminal device by the base station, which may cause the base station to fail to correctly receive the data signal sent by the terminal device.
  • the base station mainly performs channel estimation on the uplink channel of the terminal device by receiving a demodulation reference signal (DMRS) from the terminal device.
  • DMRS demodulation reference signal
  • a terminal device sending PUSCH in a slot usually a slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols, and the terminal device can be in 1 to 4 of them.
  • OFDM orthogonal frequency division multiplexing
  • DMRS is sent on the OFDM symbol
  • uplink data is sent on the remaining OFDM symbols.
  • a terminal device can occupy up to 4 OFDM symbols in a time slot to transmit DMRS.
  • OFDM symbols to occupy there are specific regulations currently.
  • FIG. 1 is a schematic diagram of a terminal device occupying one OFDM symbol in a time slot to send a DMRS.
  • the base station schedules the terminal device through downlink control information (DCI), and the terminal device sends the PUSCH to the base station after receiving the DCI.
  • DCI downlink control information
  • the terminal equipment occupies the third OFDM symbol in a time slot to send DMRS, which is the OFDM symbol represented by the hatched area in Figure 1, and other OFDM symbols in this time slot are used To send upstream data.
  • the terminal equipment can be scheduled to transmit in one time slot, or the terminal equipment can be scheduled to transmit in multiple consecutive time slots.
  • the terminal equipment can be scheduled to use all OFDM symbols for transmission, or terminal equipment can be scheduled to use part of the OFDM symbol transmission.
  • Figure 1 is an example of scheduling the terminal equipment to use all OFDM symbols in a time slot for transmission. . Specifically, which OFDM symbols the terminal device sends DMRS on depends on the configuration of the terminal device by the base station.
  • the format of the DCI for scheduling the terminal device to transmit the PUSCH mainly includes the DCI format 0_0 and the DCI format 0_1.
  • the fields included in the DCI of DCI format 0_0 can be referred to Table 1:
  • a configured grant or a method called grant free can be used, that is, without scheduling through DCI, the base station can configure the terminal device through radio resource control (RRC) signaling Transmission resources, if the terminal equipment needs to send uplink data later, it can be sent according to the resources configured by the RRC signaling, and the base station does not need to schedule it through DCI.
  • RRC radio resource control
  • the terminal device when it is transmission through DCI dynamic scheduling or transmission through configuration authorization, when the terminal device sends DMRS, it needs to be sent together with the uplink data. Then, the terminal device can only send the reference signal when there is uplink data to send. However, the uplink data sent by the terminal equipment to the base station is generally not too much, resulting in the base station being unable to obtain more reference signals. In a deep coverage scenario, the signal sent by the terminal device may be very weak when it arrives at the base station. At this time, the base station estimates the uplink channel of the terminal device based on fewer reference signals, which may make the estimation result inaccurate.
  • the base station's estimation of the uplink channel of the terminal device is not accurate enough, it will affect the demodulation of the uplink data, etc., which may cause the terminal device to fail to correctly obtain the uplink data sent by the terminal device. Therefore, how to improve the accuracy of the uplink channel estimation of the terminal equipment by the base station is a problem that needs to be solved at present.
  • the network device can indicate that only the first reference signal is transmitted through the DCI. After receiving the DCI, the terminal device can only transmit the first reference signal to the network device, so that the first reference signal does not need to be sent with the data.
  • the terminal device can separately send the first reference signal to the network device, which improves the flexibility of sending the first reference signal. Because the transmission of the first reference signal is more flexible, the terminal device can send the first reference signal to the network device multiple times, and the network device can also receive the first reference signal from the terminal device multiple times.
  • the signal estimates the uplink channel of the terminal equipment, and the accuracy of the channel estimation is improved. Therefore, the embodiment of the present application improves the accuracy of channel estimation performed by the network device for the terminal device, and enhances the communication performance of the terminal device under deep coverage.
  • the technical solutions provided by the embodiments of this application can be applied to the 4th generation (4G) 4G system, such as the LTE system, or can be applied to the 5G system, such as the NR system, or can also be applied to the next generation of mobile communication technology.
  • 4G 4th generation
  • 5G system such as the NR system
  • the communication system or other similar communication systems are not restricted in detail.
  • Figure 2 includes network equipment and terminal equipment.
  • the terminal equipment is connected to a network equipment.
  • network devices can provide services for multiple terminal devices.
  • the network device in FIG. 2 and each of the terminal devices or all of the terminal devices in the multiple terminal devices can implement the technical solutions provided in the embodiments of the present application.
  • the terminal device in FIG. 2 uses a mobile phone as an example, which is not limited to this in practical applications.
  • the network device in FIG. 2 is, for example, an access network device, such as a base station, or may also be a device such as an RSU.
  • the base station corresponds to different devices in different systems, for example, it can correspond to eNB in 4G system, and it can correspond to gNB in 5G system.
  • the technical solutions provided by the embodiments of the present application can also be applied to future mobile communication systems. Therefore, the network equipment in FIG. 2 can also correspond to the access network equipment in the future mobile communication system.
  • the embodiment of the present application provides a first communication method. Please refer to FIG. 3, which is a flowchart of the method.
  • the application of this method to the network architecture shown in FIG. 2 is taken as an example.
  • the method can be executed by two communication devices, such as a first communication device and a second communication device, where the first communication device can be a network device or can support the network device to implement the functions required by the method.
  • the communication device or the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it may also be other communication devices, such as a chip system. The same is true for the second communication device.
  • the second communication device may be a network device or a communication device capable of supporting the functions required by the network device to implement the method, or the second communication device may be a terminal device or capable of supporting the terminal device to implement the method.
  • the communication device with the required functions can of course also be other communication devices, such as a chip system.
  • the first communication device may be a network device
  • the second communication device is a terminal device, or both the first communication device and the second communication device are network devices.
  • the device, or the first communication device and the second communication device are both terminal devices, or the first communication device is a network device
  • the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, and so on.
  • the network equipment is, for example, a base station.
  • the method is executed by a network device and a terminal device as an example, that is, it is assumed that the first communication device is a network device and the second communication device is a terminal device. Because this embodiment is applied to the network architecture shown in FIG. 3 as an example, the network device described below may be the network device in the network architecture shown in FIG. 2, and the terminal device described below may be Figure 2 shows the terminal equipment in the network architecture.
  • the network device determines the DCI, where the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first reference signal can be DMRS, or DMRS can also have other names, or the first reference signal can also be other reference signals, such as sounding reference signal (SRS), etc.
  • SRS sounding reference signal
  • the specifics are not limited. It is only necessary that the first reference signal sent by the terminal device is a reference signal that the network device knows in advance, and the network device can perform channel estimation on the uplink channel of the terminal device according to the received first reference signal.
  • the DCI is only used to instruct the terminal device to send the first reference signal. It can also be described as the DCI used to instruct the terminal device to send the first reference signal independently of the uplink data, or in other words, the first reference signal.
  • the transmission of a reference signal has nothing to do with the transmission of uplink data. In other words, the DCI is only used for scheduling the first reference signal, not for scheduling uplink data.
  • the DCI may be a DCI dedicated to scheduling the first reference signal.
  • the format of the DCI is designed by the embodiment of this application, for example, it is called the first format.
  • the network device sends the DCI in the first format, it means that the DCI is only used to instruct the terminal device to send the first reference. signal.
  • the terminal device does not need to perform excessive analysis and other operations on the DCI. It only needs to recognize that the format of the DCI is the first format to determine that the DCI is only used to indicate the terminal device It is relatively simple to send the first reference signal.
  • the network device may indicate/configure a first radio network temporary identity (RNTI) for the terminal device, and the network device uses the first RNTI to perform a cyclic redundancy check (cyclic redundancy check) of the DCI in the first format. ,CRC) for scrambling, and then the network device can send the scrambled DCI in the first format.
  • RNTI radio network temporary identity
  • CRC cyclic redundancy check
  • the terminal device can determine that the received DCI is the DCI of the first format, which can be further determined according to the first RNTI.
  • the format of the DCI transmits the first reference signal.
  • the DCI can also reuse the existing DCI.
  • the DCI format used to schedule terminal equipment for uplink transmission mainly includes DCI format 0_0 and DCI format 0_1.
  • the DCI in the embodiment of this application can use DCI format 0_0 or DCI format 0_1.
  • DCI DCI format 0_0 or DCI format 0_1.
  • the DCI in the embodiment of the present application can also reuse the existing DCI in other formats, which is not specifically limited.
  • the DCI may only instruct the terminal device to send the first reference signal through the value of the first field.
  • the DCI when the value of the first field is the first value, the DCI is only used to instruct the terminal device to send the first reference signal, or when the value of the first field belongs to the first range, the DCI is only used to indicate The terminal device sends the first reference signal.
  • the first field is, for example, the modulation and coding scheme (MCS) field in the DCI, or may also be other fields in the DCI.
  • MCS modulation and coding scheme
  • DCI Take the DCI in the embodiment of this application using DCI format 0_0 or DCI format 0_1 as an example. Regardless of whether it is the DCI of the DCI format 0_0 or the DCI of the DCI format 0_1, both include the MCS field.
  • the length of the MCS field is 5 bits, and the value of these 5 bits can be "00000", “00001”, “00010”, ..., "11110", "11111". These 5 bits can have up to 32 values, which means up to 32 states.
  • the terminal equipment can use the 29 states "00000” ⁇ "11100” to indicate different modulation order and coding rate combination, or can use the 28 states "00000” ⁇ "11011” Indicate different modulation order and coding rate.
  • the terminal device can determine the modulation order and coding rate corresponding to the state by looking up Table 2 according to the state of the 5 bits in the MCS field included in the received DCI.
  • the status of the 5-bit indicated by the MCS field is 2 (that is, the value of the 5-bit is 00010), it can be known by looking up Table 2 that the corresponding modulation order is 2, and the coding rate is 193/1024.
  • Table 2 uses the 28 states of "00000" to "11011” in the MCS field to indicate different combinations of modulation order and coding rate as an example, and if the 29 states of "00000" to "11100" in the MCS field are used Indicating different combinations of modulation order and coding rate, there will be three invalid states, that is, the three states of 11101, 11110, and 11111 corresponding to 5 bits are invalid states. And 11101, 11110, 11111, these three values can all be called reserved values.
  • the embodiment of the present application considers that these reserved values of the MCS field can be used to make the DCI only instruct the terminal device to send the first reference signal.
  • the first value may be 5 bits corresponding to an unused state (invalid state) in the MCS field
  • the first value may be one of the reserved values of the MCS field.
  • the reserved value of the MCS field may include one of the following or any combination thereof: 11100, 11101, 11110, or 11111, and the first value may be one of them.
  • the reserved value includes one or more of 11100, 11101, 11110 or 11111; Or, if 29 states of "00000" to "11100" of the MCS field are used to indicate different combinations of modulation orders and coding rates, the reserved value includes one or more of 11101, 11110, or 11111.
  • the first value can be “11100”, “11101”, “11110” or “11111” "; or, if the 29 states "00000” to "11100” of the MCS field are used to indicate different combinations of modulation order and coding rate, the first value can be "11101", "11110” or "11111".
  • the first value is "11111”
  • the value of the MCS field included in the DCI is "11111” it indicates that the DCI is only used to instruct to send the first reference signal.
  • the MCS field Take the MCS field as the first field as an example.
  • the DCI only instructs the terminal device to send the first reference signal, and the invalid state of the MCS field is used to instruct the terminal device to send the first reference signal, which improves the utilization of the field status
  • there is no new field in the DCI which avoids the degradation of DCI demodulation performance due to the new DCI load.
  • the first range may include one or more unused states (invalid states) in the MCS field.
  • the first range may include one or more of the reserved values of the MCS field.
  • the first range may include “11100”, “11101", “11110” or “11111” One or more of “; or, if the 29 states "00000" ⁇ "11100" of the MCS field are used to indicate different combinations of modulation order and coding rate, the first range may include "11101" and "11110 One or more of "or "11111".
  • the first range includes “11101", “11110” and “11111”, then if the value of the MCS field included in the DCI is any one of "11101", “11110” or "11111", it means that the DCI only Used to indicate to send the first reference signal.
  • the MCS field Take the MCS field as the first field as an example.
  • the value of the MCS field belongs to the first range so that the DCI only instructs the terminal device to send the first reference signal.
  • the invalid state of the MCS field can be used, and the DCI can only instruct the terminal device to send the first reference signal.
  • the MCS field can take Multiple values, the method is more flexible.
  • the first field may not reuse the MCS field, but reuse other fields in the DCI, then the first value may be the value of other fields, or the first range may be the value of other fields.
  • the first field may also be a newly added field in the existing DCI that is multiplexed, and the specifics are not limited. For example, a 1-bit field may be added to DCI format 0_0 or DCI format 0_1. The value of is 0 or 1 to distinguish whether the DCI is scheduled for PUSCH transmission or for scheduling the first reference signal transmission.
  • the MCS field usually has no actual indication meaning for the transmission of the reference signal. Therefore, the embodiment of the present application multiplexes the invalidity in the MCS field.
  • the status indication that only the first reference signal is sent not only improves the utilization of the field status, but also ensures that the use of the invalid status of the MCS field will not cause modulation and coding errors.
  • the DMRS sent by the terminal device may be generated by the Gold sequence.
  • the specific DMRS sequence is determined by the initial phase C init .
  • the DMRS sequence carried by a certain OFDM symbol in a certain slot is determined according to the index of the slot in a radio frame and the index of the OFDM symbol in the slot.
  • the initial phase C init of the DMRS sequence can be determined by formula 1:
  • n SCID is a parameter configured by higher layers, for example, the value is 0 or 1
  • a parameter configured for a higher layer for example, the value ranges from 0 to 65535
  • mod means modulo operation.
  • the time domain symbol is an OFDM symbol as an example.
  • the initial phase of the DMRS sequence is determined by the index of the time slot where the DMRS is located in a radio frame and the index of the OFDM symbol where the DMRS is located in the time slot where the OFDM symbol is located. This also means that the DMRS sequences carried in different time slots or different OFDM symbols are different.
  • FIG. 4 is a schematic diagram of DMRS sequences carried by two time slots.
  • slot 0 and slot 1 both OFDM symbol 3 and OFDM symbol 10 are used to carry DMRS sequences.
  • OFDM symbol 3 in slot 0 is filled with vertical lines
  • OFDM symbol 10 in slot 0 is filled with "/”
  • OFDM symbol 3 of slot 1 is filled with " ⁇ ”
  • OFDM symbol 10 of slot 1 is filled with horizontal lines.
  • the different filling modes of the 4 OFDM symbols indicate that the DMRS sequences carried by the 4 OFDM symbols are different.
  • the network equipment cannot simply combine the DMRS sequences carried by different OFDM symbols when performing channel estimation based on the DMRS, but can only be based on the DMRS sequence carried by each OFDM symbol. Perform channel estimation, and then combine the results of each channel estimation. This method may cause the amplification of noise, which is not conducive to noise cancellation.
  • the embodiment of the present application proposes that the sequence of the first reference signal carried by different time domain symbols can be made the same.
  • the sequence of the first reference signal carried by the time domain symbols included in one time slot may be the same, or the sequence of the first reference signal carried by the time domain symbols included in multiple time slots may be the same.
  • the network device can change the sequence of the first reference signal carried by the two time domain symbols Combining, and then channel estimation based on the combined signal will help reduce noise and improve the accuracy of channel estimation.
  • the time domain symbol may be an OFDM symbol.
  • the first value can also indicate that the first value carried on each time domain symbol used to transmit the first reference signal How to determine the initial phase of the reference signal sequence.
  • different values of the first field may correspond to different initial phase determination methods, which are used to determine the initial phase of the sequence of the first reference signal carried on the time domain symbol of the transmission of the first reference signal.
  • the value of a field corresponds.
  • the terminal device may determine the initial phase of the sequence of the first reference signal carried on the time domain symbol used to send the first reference signal according to the value of the first field.
  • the first reference signal is carried in at least two time slots, and the initial phases of the sequence of the first reference signal carried in the at least two time slots are the same or different. Because the initial phases of the sequences are the same, it can be considered that the two sequences are the same. By making the initial phases of the sequences on different OFDM symbols the same, the sequences carried by different OFDM symbols can be made the same, and by making different OFDM symbols the same sequence. The initial phases of the above sequences are different, which can make the sequences carried by different OFDM symbols different.
  • the initial phase determination method may include one of the first initial phase determination method, the second initial phase determination method, or the third initial phase determination method.
  • the first initial phase determination method may be based on the method used to transmit the first reference signal.
  • the first time domain symbol may be a predefined time domain symbol.
  • the first time domain symbol is predefined as the first time domain symbol in the time slot, or the last time domain symbol in the time slot, or the time domain symbol in the time slot.
  • the first time domain symbol of the sequence used to carry the first reference signal, or any time domain symbol in the time slot, etc. can be specifically pre-defined by a protocol or configured by a network device.
  • the time slots used to transmit the first reference signal include time slot 0 and time slot 1.
  • the first reference signal is transmitted through OFDM symbol 3 and OFDM symbol 10.
  • the first OFDM symbol carrying the first reference signal is OFDM symbol 3
  • the first OFDM symbol carrying the first reference signal is symbol 3.
  • the sequence of the first reference signal carried by OFDM symbol 3 of slot 0 may be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 3 in slot 0 (for example, index To determine for 3), the sequence of the first reference signal carried by OFDM symbol 10 of slot 0 can be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 3 in slot 0 (For example, the index is 3) to determine that the sequence of the first reference signal carried by the OFDM symbol 3 of the time slot 1 can be determined according to the index of the time slot 1 in the radio frame (for example, the index is 1) and the OFDM symbol 3 is in the time slot 1.
  • the index (for example, index 3) in time slot 1 is determined, and the sequence of the first reference signal carried by OFDM symbol 10 of slot 1 can be determined according to the index of time slot 1 in the radio frame (for example, index 1) and OFDM symbol 3
  • the index in slot 1 (for example, the index is 3) is determined. It can be seen that the initial phase of the sequence of the first reference signal carried by OFDM symbol 3 of slot 0 and the initial phase of the sequence of the first reference signal carried by OFDM symbol 10 of slot 0 are determined in the same manner.
  • the initial phase of the sequence of the first reference signal carried by OFDM symbol 3 of 1 and the initial phase of the sequence of the first reference signal carried by OFDM symbol 10 of slot 1 are determined in the same way, which represents OFDM symbol 3 of slot 0
  • the initial phase of the sequence of the first reference signal carried by the OFDM symbol 10 is the same as that of the sequence of the first reference signal carried by the OFDM symbol 3 of the slot 1 and the initial phase of the sequence of the first reference signal carried by the OFDM symbol 10.
  • OFDM symbol 3 and OFDM symbol 10 of slot 0 are filled with horizontal lines
  • OFDM symbol 3 and OFDM symbol 10 of slot 1 are filled with "/", indicating OFDM symbol 3 and OFDM symbol 10 of slot 0
  • the initial phase of the sequence of the first reference signal carried is the same, and the initial phase of the sequence of the first reference signal carried by the OFDM symbol 3 of the time slot 1 and the OFDM symbol 10 are the same.
  • the sequence of the first reference signal carried by the time domain symbols in a time slot is the same.
  • the time domain symbol in a time slot refers to the time domain symbol used to carry the first reference signal in the time slot.
  • the number of time domain symbols used to carry the first reference signal in a time slot can be Is one or more. Therefore, for both the network equipment and the terminal equipment, the initial phase of the sequence of the first reference signal carried on each time-domain symbol used to transmit the first reference signal may not be determined separately, but rather determined to be used for transmitting the first reference signal. The initial phase of the sequence of the first reference signal carried in each time slot of a reference signal is sufficient.
  • the initial phase of the sequence of the first reference signal carried only needs to be determined once, because each time domain symbol in a time slot carries
  • the initial phases of the first reference signal sequences are all the same, so only the initial phase of the first reference signal sequence needs to be determined for one time slot.
  • the first initial phase determination method can also be described as determining according to the index of the first slot in the at least two slots and the index of the first time domain symbol in the first slot The initial phase of the sequence of the first reference signal in the first time slot.
  • the first time domain symbol may be a predefined time domain symbol.
  • the first time domain symbol is predefined as the first time domain symbol in the time slot, or the last time domain symbol in the time slot, or the time domain symbol in the time slot.
  • the first time domain symbol of the sequence used to carry the first reference signal, or any time domain symbol in the time slot, etc. can be specifically pre-defined by a protocol or configured by a network device. Because the "first time slot" in the first initial phase determination mode can be any one of at least two time slots, the first time domain symbol may not be "predefined” for a certain time slot. But it can be applied to all time slots.
  • the first time domain symbol is the first time domain symbol in the time slot, then if the first time slot is time slot 0, the first time domain symbol is the first time domain symbol in time slot 0, and if the first time domain symbol is The time slot is time slot 1, and the first time domain symbol is the first time domain symbol in time slot 1.
  • the time slot used to transmit the first reference signal includes time slot 0 and time slot 1, and the initial phase of the sequence of the first reference signal carried in time slot 0 can be based on the index of time slot 0 in the radio frame.
  • the index of the first time domain symbol in slot 0 is determined.
  • the initial phase of the sequence of the first reference signal carried in time slot 0 is the initial phase of the sequence of the first reference signal carried by each time domain symbol used to carry the sequence of the first reference signal in time slot 0 .
  • the initial phase of the sequence of the first reference signal carried by time slot 1 may be determined according to the index of time slot 1 in the radio frame and the index of the first time domain symbol in time slot 1.
  • the initial phase of the sequence of the first reference signal carried in time slot 1 that is, the initial phase of the sequence of the first reference signal carried by each time domain symbol used to carry the sequence of the first reference signal in time slot 1 .
  • the initial phases of the first reference signal sequence carried by OFDM symbol 3 and OFDM symbol 10 in slot 0 are the same, and the first reference signal sequence carried by OFDM symbol 3 and OFDM symbol 10 in slot 1
  • the initial phase of the sequence of reference signals is the same.
  • the network device may combine the sequence of the first reference signal carried by the two OFDM symbols of time slot 0, perform channel estimation according to the combined signal, and combine the sequence of the first reference signal carried by the two OFDM symbols of time slot 1
  • the sequences are combined, channel estimation is performed based on the combined signal, and then the two channel estimation results are combined. This channel estimation method helps reduce noise and improve the accuracy of channel estimation.
  • the second initial phase determination method may be that each of the first reference signal is used to transmit the first reference signal.
  • the initial phase of the sequence of the first reference signal carried on each time domain symbol is based on the index in the radio frame of the time slot in which the first time domain symbol carrying the first reference signal is located, and the first reference signal carrying the first reference signal.
  • the index of the time domain symbol in the time slot is determined.
  • the first time domain symbol may be a predefined time domain symbol, for example, the first time domain symbol is predefined as the first time domain symbol that carries the first reference signal, or the last time domain symbol that carries the first reference signal, or Other time-domain symbols other than the first time-domain symbol and the last time-domain symbol for carrying the first reference signal, etc., can be specifically pre-defined through a protocol or configured by a network device.
  • the time slots used to transmit the first reference signal include time slot 0 and time slot 1.
  • the first reference signal is transmitted through OFDM symbol 3 and OFDM symbol 10.
  • the first OFDM symbol carrying the first reference signal is OFDM symbol 3 of time slot 0.
  • the sequence of the first reference signal carried by OFDM symbol 3 of slot 0 may be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 3 in slot 0 (for example, index To determine for 3), the sequence of the first reference signal carried by OFDM symbol 10 of slot 0 can be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 3 in slot 0 (For example, the index is 3) determines that the sequence of the first reference signal carried by the OFDM symbol 3 of the time slot 1 can be determined according to the index of the time slot 0 in the radio frame (for example, the index is 0) and the OFDM symbol 3 is in the time slot 0 The index (for example, the index is 3) in the time slot 1 is determined.
  • the sequence of the first reference signal carried by the OFDM symbol 10 of the time slot 1 can be determined based on the index of the time slot 0 in the radio frame (for example, the index is 0) and the OFDM symbol 3
  • the index in time slot 0 (for example, the index is 3) is determined.
  • the initial phase of the first reference signal sequence carried by OFDM symbol 3 of slot 0 the initial phase of the first reference signal sequence carried by OFDM symbol 10 of slot 0
  • the OFDM symbol 3 of slot 1 carry The initial phase of the sequence of the first reference signal and the initial phase of the sequence of the first reference signal carried by the OFDM symbol 10 of slot 1 are determined in the same way, indicating that the first phase carried by the OFDM symbol 3 of slot 0
  • the initial phases of the sequence of the first reference signal carried by the OFDM symbol 10 are the same.
  • OFDM symbol 3 of slot 0 OFDM symbol 10 of slot 0 OFDM symbol 3 of slot 1, and OFDM symbol 10 of slot 1 are all filled with "/", which represents the OFDM symbol of slot 0 3.
  • the initial phases of the sequence of the first reference signal carried by the OFDM symbol 10 of the time slot 0, the OFDM symbol 3 of the time slot 1, and the OFDM symbol 10 of the time slot 1 are all the same.
  • the sequence of the first reference signal carried by the time domain symbols in at least two time slots used for transmitting the first reference signal is the same.
  • the time domain symbols in at least two time slots refer to the time domain symbols used to carry the first reference signal in the at least two time slots, and the time domain symbols used to carry the first reference signal in the at least two time slots.
  • the number of time domain symbols can be one or more. Therefore, for both the network equipment and the terminal equipment, the initial phase of the sequence of the first reference signal carried on each time-domain symbol used to transmit the first reference signal may not be determined separately, but rather determined to be used for transmitting the first reference signal.
  • the initial phase of the sequence of the first reference signal carried by at least two time slots of a reference signal is sufficient.
  • the initial phase of the sequence of the first reference signal carried only needs to be determined once, because each time domain symbol in the at least two time slots
  • the initial phases of the sequences of the first reference signals carried are all the same, so it is only necessary to uniformly determine the initial phases of the sequences of the first reference signals for at least two time slots. If this is the case, then the second way to determine the initial phase can also be described as determining according to the index of the first time slot in at least two time slots and the index of the first time domain symbol in the first time slot
  • the initial phase of the sequence of the first reference signal in the at least two time slots, and the first time slot is a predefined time slot of the at least two time slots.
  • the first time slot may be a predefined time slot.
  • the first time slot is predefined as the first time slot of at least two time slots, or the last time slot of at least two time slots, or at least two time slots.
  • the time slots other than the first time slot and the last time slot among the time slots can be specifically specified by the protocol or configured by the network equipment.
  • the first time domain symbol may be a predefined time domain symbol, for example, the first time domain symbol is predefined as the first time domain symbol in the first time slot, or the last time domain symbol in the first time slot, or It is the first time domain symbol used to carry the sequence of the first reference signal in the first time slot, or it can be any time domain symbol in the first time slot, etc., which can be pre-defined by the protocol. , Or configured by network equipment.
  • the time slot used to transmit the first reference signal includes time slot 0 and time slot 1, and the first time slot is time slot 0.
  • the initial phase of the sequence of the first reference signal carried in time slot 0 may be determined according to the index of time slot 0 in the radio frame and the index of the first time domain symbol in time slot 0.
  • the initial phase of the sequence of the first reference signal carried in time slot 0 is the initial phase of the sequence of the first reference signal carried by each time domain symbol used to carry the sequence of the first reference signal in time slot 0 .
  • the initial phase of the sequence of the first reference signal carried in time slot 1 may be determined according to the index of time slot 0 in the radio frame and the index of the first time domain symbol in time slot 0.
  • the initial phase of the sequence of the first reference signal carried in time slot 1 that is, the initial phase of the sequence of the first reference signal carried by each time domain symbol used to carry the sequence of the first reference signal in time slot 1 .
  • the first reference signal carried by OFDM symbol 3 of slot 0, OFDM symbol 10 of slot 0, OFDM symbol 3 of slot 1, and OFDM symbol 10 of slot 1 The initial phases of the sequences are the same.
  • the sequence of the first reference signal carried by the OFDM symbol where the first reference signal is transmitted can be made the same.
  • the network device may then combine the sequences of the first reference signal carried by the four OFDM symbols of time slot 0 and time slot 1, and then perform channel estimation based on the combined signal. This channel estimation method helps reduce noise and improve the accuracy of channel estimation.
  • the third initial phase determination method needs to separately determine the initial phase of the sequence of the first reference signal carried on each time domain symbol used to transmit the first reference signal.
  • the third initial phase determination method may be based on the index in the radio frame of the time slot where each time domain symbol used to transmit the first reference signal is located, and the time slot where each time domain symbol is located To determine the initial phase of the sequence of the first reference signal carried on each time domain symbol.
  • the time slots used to transmit the first reference signal include time slot 0 and time slot 1.
  • the first reference signal is transmitted through OFDM symbol 3 and OFDM symbol 10.
  • the sequence of the first reference signal carried by OFDM symbol 3 of slot 0 may be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 3 in slot 0 (for example, index To determine for 3)
  • the sequence of the first reference signal carried by the OFDM symbol 10 of slot 0 may be based on the index of slot 0 in the radio frame (for example, the index is 0) and the index of OFDM symbol 10 in slot 0 (For example, the index is 10) determines that the sequence of the first reference signal carried by the OFDM symbol 3 of the time slot 1 can be determined according to the index of the time slot 1 in the radio frame (for example, the index is 1) and the OFDM symbol 3 is in the time slot 1.
  • the index (for example, the index is 3) in the time slot 1 is determined.
  • the sequence of the first reference signal carried by the OFDM symbol 10 of the time slot 1 can be determined according to the index of the time slot 1 in the radio frame (for example, the index is 1) and the OFDM symbol 10
  • the index in time slot 1 is determined.
  • OFDM symbol 3 of slot 0 is filled with vertical lines
  • OFDM symbol 10 of slot 0 is filled with "/”
  • OFDM symbol 3 of slot 1 is filled with " ⁇ ”
  • the different filling modes of the 4 OFDM symbols indicate that the sequences of the first reference signals carried by the 4 OFDM symbols are different.
  • This method is similar to the method of determining the initial phase of the DMRS sequence according to Formula 1 as described above.
  • the sequence of the first reference signal determined by this initial phase determination method is the first reference signal carried by different OFDM symbols. The sequence is different.
  • the first initial phase determination method or the second initial phase determination method can be used to make more
  • the sequence of the first reference signal carried by two OFDM symbols is the same.
  • the network equipment can combine the sequences of the first reference signal carried by multiple OFDM symbols and then perform channel estimation uniformly, which helps to reduce noise, and because the channel of the terminal equipment The conditions change slowly, so the accuracy of channel estimation is basically not reduced.
  • the third initial phase determination method can be used to make the first reference carried by different OFDM symbols
  • the sequences of the signals are different, so that the network device can perform channel estimation for the sequence of the first reference signal carried by each OFDM symbol, so as to improve the accuracy of the channel estimation.
  • the third initial phase determination method if there is strong interference between the sequence of the first reference signal carried by one OFDM symbol and other sequences sent by the neighboring cell, but because the first reference signal carried by a different OFDM symbol has strong interference If the sequence of the signal is different, the interference between the sequence of the first reference signal carried by other OFDM symbols and the sequence sent by the neighboring cell may be reduced or eliminated. Therefore, the interference of the terminal device to the neighboring cell can be randomized, thereby It can reduce the interference of neighboring cells and try to ensure that it has better cross-correlation performance with reference signals of other terminal equipment in the same cell.
  • the value of the first field not only indicates that only the first reference signal is transmitted, but also the way to determine the initial phase needs to be indicated, then it may be applicable to the case where the value of the first field belongs to the first range.
  • the first range may include multiple values, then the first field may use any value in the first field to indicate that only the first reference signal is transmitted, and different values in the first range may indicate the corresponding Initial phase determination method.
  • the value of the first field indicates that only the first reference signal is transmitted, it also needs to indicate the determination method of the initial phase, which can also be applied to the case where the value of the first field is the first value, that is, If the value of the first field is the first value, in addition to indicating that only the first reference signal is to be transmitted, it may also indicate the way of determining the initial phase.
  • the value of the first field is the first value, the value of the first field can also only indicate that only the first reference signal is transmitted, but not the way to determine the initial phase.
  • the DCI can There is no need to indicate the initial phase determination method, the terminal device can determine the initial phase of the first reference signal sequence in the existing manner, or in this case, the initial phase determination method can be predefined through a protocol or configured by the network device .
  • the value of the first field is used to indicate which of the above initial phase determination methods, which can be configured by the network device, or stipulated by agreement.
  • the first value may indicate one of the above three determination methods, and may also indicate other determination methods, which are not specifically limited, as long as the indicated determination method can determine the method used to transmit the first reference signal.
  • the initial phase of the sequence of the first reference signal carried on each time domain symbol is sufficient.
  • the first value when the first value is 11111, it is used to indicate the above first initial phase determination method, when the first value is 11110, it is used to indicate the second initial phase determination method above, and when the first value is 11101, use To indicate the third initial phase determination method as above.
  • this is only an example, and the embodiment of the present application does not limit the correspondence between the first value and the corresponding initial phase determination method.
  • first initial phase determination method or the second initial phase determination method multiple consecutive and identical first reference signal sequences can be simply subjected to energy combining detection, which is suitable for terminal equipment The scene where the moving speed is slower and the channel changes slower.
  • the sequences of different first reference signals cannot simply be directly combined with energy, but it can randomize the interference of the terminal equipment to the neighboring cell, and also ensure good cross-correlation with the first reference signals of other terminal equipment in the same cell. performance.
  • multiple different invalid states are used to instruct the terminal device to determine the sequence when only sending the first reference signal, so that the network device can indicate the first reference signal more flexibly, and the terminal device can be instructed according to actual needs. In the process of sending only the first reference signal, an appropriate sending method is used.
  • the network device sends the DCI to the terminal device, and the terminal device receives the DCI from the network device, where the DCI is only used to instruct the terminal device to send the first reference signal.
  • the terminal device sends the first reference signal according to the DCI.
  • the terminal device may send the first reference signal to the network device according to the scheduling of the DCI. At this time, the first reference signal may be sent to the network device separately, without being sent together with the uplink data.
  • the terminal device may determine the selection of the first field included in the DCI after receiving the DCI. If the value of the first field is the first value, or the value of the first field belongs to the first range, the terminal device can determine that the DCI is only used for scheduling the first reference signal and not for scheduling uplink data. Then, the terminal device may send the first reference signal to the network device according to the scheduling of the DCI. At this time, the first reference signal may be sent to the network device separately, without being sent together with the uplink data.
  • the terminal device when the terminal device receives the DCI, it needs to determine the content scheduled by the DCI according to the state of the MCS field (or the value of the MCS field) included in the DCI, which is to schedule the terminal device to perform normal operations. For PUSCH transmission, only the terminal device is scheduled to transmit the first reference signal.
  • the value of the first field is the first value so that DCI only instructs the terminal device to send the first reference signal
  • the first value is "11111”
  • the first reference signal is DMRS as an example
  • the terminal device determines whether the DCI is to schedule the PUSCH normally or to schedule the terminal device to only transmit DMRS according to the value of the MCS field included in the DCI. Wherein, if one of the MCS fields belongs to one of 00000 to 11011, the terminal device determines to transmit PUSCH normally; or, if the value of the MCS field belongs to one of 11101 to 11110, the terminal device determines that the DCI is an invalid DCI; Or, if 11111 is included in the MCS field, the terminal device determines that only DMRS is transmitted.
  • the 28 states of "00000" to "11011" in the MCS field to indicate different combinations of modulation orders and coding rates.
  • the embodiment of the present application multiplexes the invalid state indication in the MCS field to transmit only the first reference signal, which improves the utilization of the field state. Moreover, sending a reference signal usually does not need to be modulated and coded, so the MCS field usually has no indication meaning for sending the reference signal, and the use of the MCS field in the embodiment of the present application will not cause modulation and coding errors. In addition, the technical solution of the embodiment of the present application does not add additional bits to the DCI, which can ensure the demodulation performance of the DCI as much as possible without increasing the complexity of the system.
  • the terminal device may further determine at least one of the time domain resource, the frequency domain resource, or the transmission power of the first reference signal for sending the first reference signal. .
  • the time domain resource used to transmit the first reference signal may be determined, or the frequency domain resource used to transmit the first reference signal may be determined, or the transmit power of the first reference signal may be determined, or it may be determined to transmit the first reference signal.
  • the time domain resources, frequency domain resources, and the transmission power of the first reference signal of the signal, or the time domain resources used to send the first reference signal and the transmission power of the first reference signal are determined, or the first reference signal is determined to be used for sending
  • the frequency domain resource of the signal and the transmission power of the first reference signal, or the frequency domain resource and frequency domain resource used to transmit the first reference signal are determined, and so on.
  • the terminal device may determine the time domain resource, the frequency domain resource or the transmission power of the first reference signal for transmitting the first reference signal according to other fields included in the DCI except the first field. At least one of them.
  • the field used to determine the time-frequency resource of the first reference signal included in the DCI may include one or one of a time-domain resource allocation field, a frequency-domain resource allocation field, a frequency hopping indicator field, or a UL/SUL carrier indicator field. Multiple.
  • the field included in the DCI for determining the transmission power of the first reference signal may include a transmission power control command field.
  • the terminal device can perform one or more of the following operations:
  • the terminal device can determine the time domain resources occupied by the first reference signal according to the time domain resource allocation field included in the DCI; if the DCI includes a frequency domain resource allocation field, the terminal device can determine the time domain resources occupied by the first reference signal according to the frequency domain resource allocation field included in the DCI.
  • the domain resource allocation field determines the frequency domain resources occupied by the first reference signal; if the DCI includes a frequency hopping flag field, the terminal device can determine whether the first reference signal is to be sent by frequency hopping according to the frequency hopping flag field included in the DCI; if the DCI includes UL/SUL carrier indication field, the terminal equipment can determine whether the first reference signal is sent on the UL carrier or the SUL carrier according to the UL/SUL carrier indication field included in the DCI; if the DCI includes the transmission power control command field, the terminal equipment The transmission power control command field included in the DCI determines the transmission power of the first reference signal. Wherein, if the frequency hopping flag field indicates that the first reference signal needs to be sent by frequency hopping, the terminal device can send the first reference signal using a specific time-frequency pattern during the sending process according to a predefined rule.
  • the terminal device transmits the PUSCH or the first reference signal according to the scheduling of the DCI. If the value of the MCS field of the DCI received by the terminal device is one of 00000 to 11100, the terminal device determines to send the PUSCH normally, and determines the time-frequency resource and PUSCH transmission power used to send the PUSCH according to other fields included in the DCI If the value of the MCS field of the DCI received by the terminal device is 11111, the terminal device determines to send only the first reference signal (here, the first value is 11111 as an example), and determines the first reference signal according to other fields included in the DCI The time domain resource, frequency domain resource of a reference signal, the transmission power of the first reference signal, etc.
  • Fig. 8 takes as an example that both the PUSCH and the first reference signal are transmitted in a frequency hopping manner.
  • the OFDM symbol drawn with horizontal lines represents the OFDM symbol carrying the PUSCH
  • the OFDM symbol drawn with "/" represents the OFDM symbol carrying the first reference signal.
  • the time domain resource allocation field, frequency domain resource allocation field, frequency hopping flag field, and UL/SUL carrier indicator field can be used to indicate the time-frequency resources of the PUSCH, and the transmission power control command
  • the field can be used to indicate the transmission power of PUSCH.
  • these fields and related indication methods can be multiplexed to indicate one of the time domain resource, frequency domain resource, or transmit power of the first reference signal.
  • the terminal device may determine one or more of the time domain resource, the frequency domain resource, or the transmission power according to the fields included in the DCI.
  • Such processing makes the indication of the time-frequency resource and transmission power of the first reference signal flexible, and can be dynamically indicated according to DCI instead of only semi-static configuration through RRC signaling; on the other hand, it also ensures that "only The time-frequency resource and the transmission power are indicated in the same manner when transmitting the first reference signal and when the PUSCH is normally scheduled, which is beneficial to reducing the implementation complexity of network equipment and terminal equipment.
  • the terminal device may not determine the time-frequency resource and/or transmission power of the first reference signal according to the DCI.
  • the network device may send RRC signaling to the terminal device.
  • the RRC signaling may be used to configure one or more of the time domain resource, frequency domain resource, or transmit power of the first reference signal, and the terminal device may receive the signal from the network device.
  • one or more of the time domain resource, frequency domain resource, or transmit power of the first reference signal can be determined (what the terminal device can determine is indicated by the network device through RRC signaling.
  • the network device may pass The RRC signaling indicates the time domain resource of the first reference signal, the terminal device can determine the time domain resource of the first reference signal according to the RRC signaling, and if the network device does not indicate the time domain of the first reference signal through the RRC signaling Resource, the terminal device cannot determine the time domain resource of the first reference signal according to the RRC signaling).
  • the terminal device receives the DCI only used to indicate the transmission of the first reference signal, it may determine one or more of the time domain resource, the frequency domain resource or the transmission power of the first reference signal according to the configuration of the RRC signaling.
  • the time domain resource of the first reference signal may be determined, or the frequency domain resource of the first reference signal may be determined, or the transmission power of the first reference signal may be determined, or the time domain resource and frequency domain resource of the first reference signal may be determined, or The time domain resource and transmission power of the first reference signal, or the frequency domain resource and transmission power of the first reference signal are determined, or the time domain resource, frequency domain resource and transmission power of the first reference signal are determined.
  • the network device configures in a semi-static manner the resources occupied by the first reference signal when only sending the first reference signal, and the network device may not indicate the resource of the first reference signal in the DCI. Then the network device can use the DCI to indicate the resource field (the time domain resource allocation field, the frequency domain resource allocation field, the frequency hopping indicator field, the UL/SUL carrier indicator field or the transmission power control command field or one of Multiple) all "1" or all "0", then after the terminal device receives the DCI, if it determines that these fields are all 0 or all 1, it can be determined that the DCI is received correctly, otherwise the DCI may be received incorrectly ( Including transmission errors or demodulation errors, etc.), which is equivalent to enhancing the error correction performance of the terminal equipment.
  • the resource field the time domain resource allocation field, the frequency domain resource allocation field, the frequency hopping indicator field, the UL/SUL carrier indicator field or the transmission power control command field or one of Multiple
  • the terminal device After the terminal device determines the time domain resource, frequency domain resource, or transmit power of the first reference signal according to the method described above, it can send the first reference signal according to the determined information, and the network device can receive the first reference signal from the terminal device. signal. After the network device receives the first reference signal, it can perform channel estimation on the uplink channel of the terminal device according to the first reference signal, or can perform other operations.
  • the embodiment of the present application does not deal with how the network device uses the first reference signal. limit.
  • the network device may also send other DCI to the terminal device.
  • the other DCI may schedule the terminal device to send PUSCH to the network device, or send other reference signals, etc.
  • the terminal device will also send corresponding information to the network device according to other DCIs, and there is no restriction here.
  • the multiplexed DCI format 0_0 is taken as an example. It is clear to those skilled in the art that the technology provided in the embodiment of this application The solution is also applicable to DCI of DCI format 0_1 or DCI of other existing formats.
  • the embodiment of the present application enables the decoupling of the transmission data and the reference signal, that is, the data and the reference signal can be sent separately.
  • the network device can separately instruct the terminal device to send the first reference signal through the DCI, so as to enhance the channel estimation performance without relying on the DMRS in the PUSCH to perform channel estimation.
  • the network device may only instruct the terminal device to send the first reference signal multiple times, so that the network device can obtain more first reference signals to improve the accuracy of channel estimation.
  • the network device can flexibly instruct the terminal device to send the first reference signal without changing the length and format of the existing DCI, thereby improving the channel estimation performance of the network device, thereby improving the performance of the communication system Coverage performance, low complexity, and strong feasibility.
  • FIG. 9 is a schematic block diagram of a communication device 900 according to an embodiment of the application.
  • the communication device 900 is a terminal device 900, for example.
  • the terminal device 900 includes a processing module 910 and a transceiver module 920.
  • the processing module 910 may be used to perform all operations performed by the terminal device in the embodiment shown in FIG. 3 except for the transceiving operation, for example, determining that the received DCI is only used to instruct the terminal device to send the first reference signal. Steps, and/or other processes used to support the techniques described herein.
  • the transceiving module 920 may be used to perform all the transceiving operations performed by the terminal device in the embodiment shown in FIG. 3, such as S32 and S33, and/or other processes used to support the technology described herein.
  • the transceiver module 920 is configured to receive downlink control information DCI, where the DCI is only used to instruct the terminal device 900 to send the first reference signal;
  • the processing module 910 is configured to determine that the DCI only instructs the terminal device 900 to send the first reference signal
  • the transceiver module 920 is further configured to send the first reference signal according to the DCI.
  • the DCI is not used for scheduling data.
  • the DCI includes a first field; wherein,
  • the DCI is only used to instruct the terminal device 900 to send the first reference signal; or,
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values:
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods, and the processing module 910 is configured to:
  • a method for determining the initial phase of the sequence of the first reference signal carried on the time domain symbol used for sending the first reference signal is determined according to the value of the first field.
  • the first reference signal is carried in at least two time slots, and the initial phases of the sequence of the first reference signal carried in the at least two time slots are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes:
  • the initial phase of the sequence, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are different, and the determining manner includes:
  • processing module 910 is further configured to:
  • the transceiver module 920 is further configured to receive RRC signaling from the network device, and determine the time domain resource and frequency domain occupied by the first reference signal according to the RRC signaling One or more of resources and transmission power.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • processing module 910 in the embodiment of the present application may be implemented by a processor or processor-related circuit components
  • transceiver module 920 may be implemented by a transceiver or transceiver-related circuit components.
  • an embodiment of the present application also provides a communication device 1000.
  • the communication device 1000 is, for example, a terminal device 1000.
  • the terminal device 1000 includes a processor 1010, a memory 1020, and a transceiver 1030.
  • the memory 1020 stores instructions or programs
  • the processor 1010 is configured to execute the instructions or programs stored in the memory 1020.
  • the processor 1010 is used to perform the operations performed by the processing module 910 in the foregoing embodiment
  • the transceiver 1030 is used to perform the operations performed by the transceiver module 920 in the foregoing embodiment.
  • terminal device 900 or the terminal device 1000 may correspond to the terminal device in the embodiment shown in FIG. 3, and the operation and/or function of each module in the terminal device 900 or the terminal device 1000 are respectively In order to implement the corresponding process in the embodiment shown in FIG. 3, for the sake of brevity, details are not described herein again.
  • FIG. 11 is a schematic block diagram of a communication device 1100 according to an embodiment of the application.
  • the communication device 1100 is a network device 1100, for example.
  • the network device 1100 includes a processing module 1110 and a transceiver module 1120.
  • the processing module 1110 may be used to perform all operations performed by the network device in the embodiment shown in FIG. 3 except for the transceiving operations, such as S31, and/or other processes used to support the technology described herein.
  • the transceiver module 1120 may be used to perform all the transceiver operations performed by the network device in the embodiment shown in FIG. 3, such as S32 and S33, and/or other processes used to support the technology described herein.
  • the processing module 1110 is configured to determine DCI, where the DCI is only used to instruct the terminal device to send the first reference signal;
  • the transceiver module 1120 is configured to send the DCI to a terminal device, and the DCI is only used to instruct the terminal device to send a first reference signal;
  • the transceiver module 1120 is further configured to receive the first reference signal indicated by the DCI from the terminal device.
  • the DCI is not used for scheduling data.
  • the DCI includes a first field; wherein,
  • the DCI is only used to instruct the terminal device to send the first reference signal;
  • the DCI is only used to instruct the terminal device to send the first reference signal.
  • the first field is an MCS field.
  • the first range includes at least two of the following values:
  • the first value is 11100, 11101, 11110, or 11111.
  • different values of the first field correspond to different initial phase determination methods, and are used to transmit the first reference signal on the time domain symbol of the first reference signal.
  • the method for determining the initial phase of the sequence corresponds to the value of the first field.
  • the first reference signal is carried in at least two time slots, and the initial phases of the sequence of the first reference signal carried in the at least two time slots are the same or different.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are the same, and the determining manner includes:
  • the initial phase of the sequence, the first time slot is a predefined time slot of the at least two time slots.
  • the initial phases of the first reference signal sequences carried by the at least two time slots are different, and the determining manner includes:
  • the DCI further includes one or more of time domain resource allocation resources, frequency domain resource allocation resources, or transmission power control command fields, where,
  • the time domain resource allocation field is used to indicate the time domain resources occupied by the first reference signal
  • the frequency domain resource allocation field is used to indicate the frequency domain resource occupied by the first reference signal
  • the transmission power control command field is used to indicate the transmission power of the first reference signal.
  • the transceiver module 1120 is further configured to send RRC signaling to the terminal device, where the RRC signaling is used to indicate the time domain resources and frequency domain resources occupied by the first reference signal And one or more of the transmit power.
  • the format of the DCI is DCI format 0_0 or DCI format 0_1.
  • processing module 1110 in the embodiment of the present application may be implemented by a processor or processor-related circuit components
  • transceiver module 1120 may be implemented by a transceiver or transceiver-related circuit components.
  • an embodiment of the present application also provides a communication device 1200.
  • the communication device 1200 is, for example, a network device 1200.
  • the network device 1200 includes a processor 1210, a memory 1220, and a transceiver 1230.
  • the memory 1220 stores instructions or programs
  • the processor 1210 is configured to execute the instructions or programs stored in the memory 1220.
  • the processor 1210 is used to perform the operations performed by the processing module 1110 in the foregoing embodiment
  • the transceiver 1230 is used to perform the operations performed by the transceiver module 1120 in the foregoing embodiment.
  • the network device 1100 or the network device 1200 may correspond to the network device in the embodiment shown in FIG. 3, and the operations and/or functions of each module in the network device 1100 or the network device 1200 are respectively In order to implement the corresponding process in the embodiment shown in FIG. 3, for the sake of brevity, details are not described herein again.
  • the embodiment of the present application also provides a communication device, which may be a terminal device or a circuit.
  • the communication device may be used to perform actions performed by the terminal device in the method embodiment shown in FIG. 3 above.
  • FIG. 13 shows a simplified structural diagram of the terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 13. In actual terminal equipment products, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device
  • the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1310 and a processing unit 1320.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1310 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1310 as the sending unit, that is, the transceiver unit 1310 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1310 is used to perform the sending and receiving operations on the terminal device side in the method embodiment shown in FIG. 3, and the processing unit 1320 is used to perform the terminal device side in the method embodiment shown in FIG. Operations other than operations.
  • the transceiving unit 1310 is used to perform the transceiving steps on the terminal device side in the embodiment shown in FIG. 3, such as S32 and S33, and/or other processes used to support the technology described herein .
  • the processing unit 1320 is configured to perform other operations on the terminal device side in the embodiment shown in FIG. 3 except for the transceiving operation, for example, determining that the DCI is only used to instruct the terminal device to send the first reference signal, and/or for Other processes that support the technology described in this article.
  • the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.
  • the device shown in FIG. 14 can be referred to.
  • the device can perform functions similar to the processor 1010 in FIG. 10.
  • the device includes a processor 1410, a data sending processor 1420, and a data receiving processor 1430.
  • the processing module 910 in the foregoing embodiment may be the processor 1410 in FIG. 14 and complete corresponding functions; the transceiving module 920 in the foregoing embodiment may be the sending data processor 1420 in FIG. 14 and/or receiving data The processor 1430.
  • channel encoder and the channel decoder are shown in FIG. 14, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.
  • the processing device 1500 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment can be used as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1503 and an interface 1504.
  • the processor 1503 completes the function of the aforementioned processing module 910
  • the interface 1504 completes the function of the aforementioned transceiver module 920.
  • the modulation subsystem includes a memory 1506, a processor 1503, and a program stored in the memory 1506 and running on the processor.
  • the processor 1503 implements the method shown in FIG. 3 when the program is executed. The method on the terminal device side in the example.
  • the memory 1506 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1500, as long as the memory 1506 can be connected to the The processor 1503 is fine.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • the program When the program is executed by a processor, it can implement the process related to the terminal device in the embodiment shown in FIG. 3 provided by the above method embodiment. .
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • the program When the program is executed by a processor, it can implement the process related to the network device in the embodiment shown in FIG. 3 provided by the foregoing method embodiment. .
  • the embodiment of the present application also provides a computer program product containing instructions, which when executed, execute the method on the terminal device side in the method embodiment shown in FIG. 3.
  • the embodiment of the present application also provides a computer program product containing instructions that, when executed, execute the method on the network device side in the method embodiment shown in FIG. 3.
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un dispositif de communication. Le procédé de communication consiste : à envoyer des informations de commande de liaison descendante (DCI) à un dispositif terminal, les DCI étant uniquement utilisées pour ordonner au dispositif terminal d'envoyer un premier signal de référence ; et à recevoir le premier signal de référence, ordonné par les DCI, provenant du dispositif terminal. Dans les modes de réalisation de la présente invention, un premier signal de référence n'a pas besoin d'être envoyé conjointement avec des données, et, par conséquent, lorsqu'un dispositif de réseau a une demande, un dispositif terminal peut envoyer le premier signal de référence au dispositif de réseau séparément, ce qui permet d'améliorer la flexibilité d'envoi du premier signal de référence. Comme l'envoi du premier signal de référence est relativement flexible, le dispositif terminal peut envoyer le premier signal de référence au dispositif de réseau plusieurs fois, et le dispositif de réseau peut également recevoir le premier signal de référence provenant du dispositif terminal plusieurs fois, ce qui permet d'améliorer, par renforcement de la couverture du premier signal de référence, la précision du dispositif de réseau effectuant une estimation de canal sur le dispositif terminal.
PCT/CN2020/087636 2019-05-17 2020-04-28 Procédé et dispositif de communication WO2020233370A1 (fr)

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