WO2020233370A1 - 一种通信方法及设备 - Google Patents

一种通信方法及设备 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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Prior art keywords
reference signal
dci
terminal device
field
time slot
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PCT/CN2020/087636
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English (en)
French (fr)
Inventor
费永强
谢信乾
郭志恒
程型清
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • 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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Abstract

本申请涉及一种通信方法及设备，其中的一种通信方法包括：向终端设备发送DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。本申请实施例中，第一参考信号无需与数据一同发送，那么在网络设备有需求时，终端设备可以单独向网络设备发送第一参考信号，提高了第一参考信号发送的灵活性。而正因为第一参考信号的发送较为灵活，因此终端设备可以多次向网络设备发送第一参考信号，网络设备也可以多次接收来自终端设备的第一参考信号，从而通过加强第一参考信号的覆盖，提升网络设备对于终端设备进行信道估计的准确性。

Description

一种通信方法及设备
相关申请的交叉引用
本申请要求在2019年05月17日提交中国国家知识产权局、申请号为201910413516.1、申请名称为“一种通信方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及设备。
背景技术
在无线通信系统，如新无线(new radio，NR)通信系统中，终端设备和基站之间交互的信息通过物理信道进行承载。其中，终端设备发送的上行数据，通常通过物理上行共享信道(physical uplink shared channel，PUSCH)承载；终端设备发送的上行控制信息，通常通过物理上行控制信道(physical uplink control channel，PUCCH)承载。此外，终端设备还可以发送参考信号，基站通过接收来自终端设备的参考信号，可以估计终端设备在不同频率上的信道响应或信道质量。
目前，终端设备是将参考信号和上行数据一并发送，那么终端设备只会在有上行数据发送时才能发送参考信号。当终端设备处于地下室或小区边缘等深覆盖区域时，由终端设备发送的无线信号到达基站时将变得非常微弱，基站需要通过终端设备发送更多的参考信号，以进行更准确的信道估计。但终端设备向基站发送的上行数据一般不会太多，导致基站无法获得足够的参考信号，而基站根据较少的参考信号对终端设备的上行信道进行估计，则很可能会使得估计的结果不够准确。如果基站对终端设备的上行信道的估计不够准确，则会影响对上行数据的解调等，从而很可能导致基站无法正确获得终端设备所发送的上行数据。因此，如何提高基站对终端设备的上行信道估计的准确性，是目前需要解决的问题。
发明内容
本申请实施例提供一种通信方法及设备，用于提高网络设备对终端设备的上行信道估计的准确性。
第一方面，提供第一种通信方法，该方法包括：向终端设备发送DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
该方法可由第一通信装置执行，第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。示例性地，所述通信设备为网络设备。
在本申请实施例中，网络设备可以通过DCI仅指示传输第一参考信号，则终端设备接收DCI后可以向网络设备传输第一参考信号，从而第一参考信号无需与数据一同发送，那么在网络设备有需求时，终端设备可以单独向网络设备发送第一参考信号，提高了第一参考信号发送的灵活性。而正因为第一参考信号的发送较为灵活，因此终端设备可以多次向 网络设备发送第一参考信号，网络设备也可以多次接收来自终端设备的第一参考信号，从而通过加强第一参考信号的覆盖，提升网络设备对于终端设备进行信道估计的准确性。
结合第一方面，在第一方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
DCI可以通过所包括的第一字段来仅指示终端设备发送第一参考信号，而DCI所包括的其他字段还可以指示其他的信息，可以提高DCI的利用率。第一字段可以通过一个取值来使得DCI仅指示终端设备发送第一参考信号，从而第一字段的其他取值还可以指示其他的内容，或者DCI也可以通过多个取值(第一范围)来使得DCI仅指示终端设备发送第一参考信号，有助于提高终端设备的容错机制。
结合第一方面，在第一方面的一种可能的实施方式中，所述第一字段为MCS字段。
目前，MCS字段还有一些状态是未被利用的，也就是有些状态不用于指示MCS，因此本申请实施例可以利用这些状态来使得DCI仅指示终端设备发送第一参考信号。既利用了MCS字段的无效状态，提高了对于字段的利用率，又无需在DCI中增加新的字段，可以避免因为改变DCI的格式而导致的性能的下降。
结合第一方面，在第一方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
如上几个取值是MCS字段的几种无效状态对应的取值，因此第一范围可以包括如上取值中的至少两个，从而利用MCS字段的无效状态。
结合第一方面，在第一方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
同样的，如上几个取值是MCS字段的几种无效状态对应的取值，因此第一值可以是如上取值中的一个，从而利用MCS字段的无效状态。
结合第一方面，在第一方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式，与所述第一字段的取值对应。
第一字段的取值除了可以仅指示终端设备发送第一参考信号外，还可以指示第一参考信号的序列的初始相位的确定方式，从而第一字段所指示的含义更为丰富。
结合第一方面，在第一方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
序列的初始相位相同，就可以认为两个序列相同，那么通过令不同的OFDM符号上的序列的初始相位相同，也就可以使得不同的OFDM符号承载的序列相同，而通过令不同的OFDM符号上的序列的初始相位不同，也就可以使得不同的OFDM符号承载的序列不同。
结合第一方面，在第一方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
第一时隙可以是预定义的时隙，例如第一时隙预定义为至少两个时隙中的首个时隙，或者为至少两个时隙中的最后一个时隙，或者为至少两个时隙中的除了首个时隙和最后一个时隙之外的其他时隙等，具体的可以由协议规定，或者由网络设备配置。第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为第一时隙中的首个时域符号，或者为第一时隙中的最后一个时域符号，或者为第一时隙中的第一个用于承载第一参考信号的序列的时域符号，或者也可以是第一时隙中的任意一个时域符号，等等，具体的可以通过协议预定义，或者由网络设备配置。可以看到，在这种初始相位确定方式下，用于传输第一参考信号的至少两个时隙中的时域符号所承载的第一参考信号的序列都是相同的。因此，如果采用这种初始相位确定方式，可以使得一次传输的第一参考信号所在的时域符号所承载的第一参考信号的序列相同。则网络设备可以将时隙0和时隙1的四个时域符号承载的第一参考信号的序列进行合并，再根据合并后的信号进行信道估计。这种信道估计的方式有助于减小噪声，提高信道估计的准确性。
结合第一方面，在第一方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为时隙中的首个时域符号，或者为时隙中的最后一个时域符号，或者为时隙中的第一个用于承载第一参考信号的序列的时域符号，或者也可以是时隙中的任意一个时域符号，等等，具体的可以通过协议预定义，或者由网络设备配置。因为这种初始相位确定方式下的“第一时隙”可以是至少两个时隙中的任意一个时隙，因此第一时域符号也可以不是针对某个时隙“预定义”的，而是对于所有的时隙都可以适用。例如第一时域符号是时隙中的首个时域符号，那么如果第一时隙为时隙0，则第一时域符号就是时隙0中的首个时域符号，而如果第一时隙为时隙1，则第一时域符号就是时隙1中的首个时域符号。可以看到，在这种初始相位确定方式下，一个时隙中的时域符号所承载的第一参考信号的序列是相同的，不同时隙所承载的第一参考信号的序列可能是不同的。因此，如果采用这种初始相位确定方式，可以使得一个时隙中的时域符号所承载的第一参考信号的序列相同。则网络设备可以将时隙0的两个时域符号承载的第一参考信号的序列进行合并，根据合并后的信号进行信道估计，以及将时隙1的两个时域符号承载的第一参考信号的序列进行合并，根据合并后的信号进行信道估计，再将两个信道估计结果进行合并。这种信道估计的方式有助于减小噪声，提高信道估计的准确性。
结合第一方面，在第一方面的一种可能的实施方式中，所述DCI还包括时域资源分配资源字段、频域资源分配资源字段或传输功率控制命令字段中的一个或多个，其中，
所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
时域资源分配资源字段、频域资源分配资源字段和传输功率控制命令字段原本是用于指示DCI所调度的PUSCH的时频资源和发送功率，本申请实施例可以利用这些字段来指示第一参考信号的时频资源和发送功率，从而提高对于这些字段的利用率。
结合第一方面，在第一方面的一种可能的实施方式中，所述方法还包括：向所述终端 设备发送RRC信令，所述RRC信令用于指示所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
第一参考信号的时频资源或发送功率等也可以不通过DCI来指示，而是通过RRC信令来半静态配置，从而DCI无需指示过多的信息，终端设备只需根据RRC信令所配置的资源发送第一参考信号即可。
结合第一方面，在第一方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
当然这两种DCI格式只是举例，本申请实施例并不限制DCI格式。
第二方面，提供第二种通信方法，该方法包括：接收下行控制信息DCI，所述DCI仅用于指示终端设备发送第一参考信号；所述终端设备根据所述DCI发送所述第一参考信号。
该方法可由第二通信装置执行，第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置，例如芯片系统。示例性地，所述通信设备为终端设备。
结合第二方面，在第二方面的一种可能的实施方式中，所述DCI不用于调度数据。
结合第二方面，在第二方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
结合第二方面，在第二方面的一种可能的实施方式中，所述第一字段为MCS字段。
结合第二方面，在第二方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
结合第二方面，在第二方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
结合第二方面，在第二方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，所述方法还包括：根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
结合第二方面，在第二方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
结合第二方面，在第二方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
结合第二方面，在第二方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
结合第二方面，在第二方面的一种可能的实施方式中，所述方法还包括如下的一项或它们的任意组合：
根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
结合第二方面，在第二方面的一种可能的实施方式中，所述方法还包括：接收来自所述网络设备的RRC信令，并根据所述RRC信令确定所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
结合第二方面，在第二方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
关于第二方面或第二方面的各种可能的实施方式的技术效果，可以参考对于第一方面或第一方面的相应的实施方式的技术效果的介绍。
第三方面，提供第一种通信装置，例如该通信装置为如前所述的第一通信装置。所述通信装置用于执行上述第一方面或第一方面的任一可能的实现方式中的方法。具体地，所述通信装置可以包括用于执行第一方面或第一方面的任一可能的实现方式中的方法的模块，例如包括处理模块和收发模块。示例性地，所述通信装置为通信设备。示例性地，所述通信设备为网络设备。其中，
所述处理模块，用于确定DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
所述收发模块，用于向终端设备发送所述DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
所述收发模块，还用于接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
结合第三方面，在第三方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
结合第三方面，在第三方面的一种可能的实施方式中，所述第一字段为MCS字段。
结合第三方面，在第三方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
结合第三方面，在第三方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
结合第三方面，在第三方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式，与所述第一字段的取值对应。
结合第三方面，在第三方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
结合第三方面，在第三方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时 隙。
结合第三方面，在第三方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
结合第三方面，在第三方面的一种可能的实施方式中，所述DCI还包括时域资源分配资源字段、频域资源分配资源字段或传输功率控制命令字段中的一个或多个，其中，
所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
结合第三方面，在第三方面的一种可能的实施方式中，所述收发模块，还用于向所述终端设备发送RRC信令，所述RRC信令用于指示所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
结合第三方面，在第三方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
关于第三方面或第三方面的各种可能的实施方式的技术效果，可以参考对于第一方面或第一方面的相应的实施方式的技术效果的介绍。
第四方面，提供第二种通信装置，例如该通信装置为如前所述的第一通信装置。所述通信装置用于执行上述第二方面或第二方面的任一可能的实现方式中的方法。具体地，所述通信装置可以包括用于执行第二方面或第二方面的任一可能的实现方式中的方法的模块，例如包括处理模块和收发模块。示例性地，所述通信装置为通信设备。示例性地，所述通信设备为终端设备。其中，
所述收发模块，用于接收DCI，所述DCI仅用于指示终端设备发送第一参考信号；
所述处理模块，用于确定所述DCI仅指示终端设备发送第一参考信号；
所述收发模块，还用于根据所述DCI发送所述第一参考信号。
结合第四方面，在第四方面的一种可能的实施方式中，所述DCI不用于调度数据。
结合第四方面，在第四方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
结合第四方面，在第四方面的一种可能的实施方式中，所述第一字段为MCS字段。
结合第四方面，在第四方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
结合第四方面，在第四方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
结合第四方面，在第四方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，所述处理模块，用于根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
结合第四方面，在第四方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
结合第四方面，在第四方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
结合第四方面，在第四方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
结合第四方面，在第四方面的一种可能的实施方式中，所述处理模块还用于执行如下的一项或它们的任意组合：
根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
结合第四方面，在第四方面的一种可能的实施方式中，所述收发模块，还用于接收来自所述网络设备的RRC信令，并根据所述RRC信令确定所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
结合第四方面，在第四方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
关于第四方面或第四方面的各种可能的实施方式的技术效果，可以参考对于第二方面或第二方面的相应的实施方式的技术效果的介绍。
第五方面，提供第三种通信装置，该通信装置例如为如前所述的第一通信装置。该通信装置包括处理器和收发器，处理器和收发器相互耦合，用于实现上述第一方面或第一方面的各种可能的设计所描述的方法。示例性地，所述通信装置为设置在通信设备中的芯片。示例性的，所述通信设备为网络设备。其中，收发器例如通过通信设备中的天线、馈线和编解码器等实现，或者，如果所述通信装置为设置在通信设备中的芯片，那么收发器例如为芯片中的通信接口，该通信接口与通信设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。其中，
所述处理器，用于确定DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
所述收发器，用于向终端设备发送所述DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
所述收发器，还用于接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
结合第五方面，在第五方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
结合第五方面，在第五方面的一种可能的实施方式中，所述第一字段为MCS字段。
结合第五方面，在第五方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
结合第五方面，在第五方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
结合第五方面，在第五方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式，与所述第一字段的取值对应。
结合第五方面，在第五方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
结合第五方面，在第五方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
结合第五方面，在第五方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
结合第五方面，在第五方面的一种可能的实施方式中，所述DCI还包括时域资源分配资源字段、频域资源分配资源字段或传输功率控制命令字段中的一个或多个，其中，
所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
结合第五方面，在第五方面的一种可能的实施方式中，所述收发器，还用于向所述终端设备发送RRC信令，所述RRC信令用于指示所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
结合第五方面，在第五方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
关于第五方面或第五方面的各种可能的实施方式的技术效果，可以参考对于第一方面或第一方面的相应的实施方式的技术效果的介绍。
第六方面，提供第四种通信装置，该通信装置例如为如前所述的第四通信装置。该通信装置包括处理器和收发器，处理器和收发器相互耦合，用于实现上述第二方面或第二方面的各种可能的设计所描述的方法。示例性地，所述通信装置为设置在通信设备中的芯片。示例性的，所述通信设备为终端设备。其中，收发器例如通过通信设备中的天线、馈线和编解码器等实现，或者，如果所述通信装置为设置在通信设备中的芯片，那么收发器例如为芯片中的通信接口，该通信接口与通信设备中的射频收发组件连接，以通过射频收发组件实现信息的收发。其中，
所述收发器，用于接收DCI，所述DCI仅用于指示终端设备发送第一参考信号；
所述处理器，用于确定所述DCI仅指示终端设备发送第一参考信号；
所述收发器，还用于根据所述DCI发送所述第一参考信号。
结合第六方面，在第六方面的一种可能的实施方式中，所述DCI不用于调度数据。
结合第六方面，在第六方面的一种可能的实施方式中，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
结合第六方面，在第六方面的一种可能的实施方式中，所述第一字段为MCS字段。
结合第六方面，在第六方面的一种可能的实施方式中，所述第一范围包括如下取值中的至少两个：11100，11101，11110，或，11111。
结合第六方面，在第六方面的一种可能的实施方式中，所述第一值为11100、11101、11110、或11111。
结合第六方面，在第六方面的一种可能的实施方式中，所述第一字段的不同取值对应不同的初始相位确定方式，所述处理器，用于根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
结合第六方面，在第六方面的一种可能的实施方式中，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
结合第六方面，在第六方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
结合第六方面，在第六方面的一种可能的实施方式中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
结合第六方面，在第六方面的一种可能的实施方式中，所述处理器还用于执行如下的一项或它们的任意组合：
根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
结合第六方面，在第六方面的一种可能的实施方式中，所述收发器，还用于接收来自所述网络设备的RRC信令，并根据所述RRC信令确定所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
结合第六方面，在第六方面的一种可能的实施方式中，所述DCI的格式为DCI格式0_0或DCI格式0_1。
关于第六方面或第六方面的各种可能的实施方式的技术效果，可以参考对于第二方面或第二方面的相应的实施方式的技术效果的介绍。
第七方面，提供第五种通信装置。该通信装置可以为上述方法设计中的第一通信装置。 示例性地，所述通信装置为设置在通信设备中的芯片。示例性地，所述通信设备为网络设备。该通信装置包括：存储器，用于存储计算机可执行程序代码；以及处理器，处理器与存储器耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使第五种通信装置执行上述第一方面或第一方面的任意一种可能的实施方式中的方法。
其中，第五种通信装置还可以包括通信接口，该通信接口可以是网络设备中的收发器，例如通过所述通信装置中的天线、馈线和编解码器等实现，或者，如果第五种通信装置为设置在网络设备中的芯片，则通信接口可以是该芯片的输入/输出接口，例如输入/输出管脚等。
第八方面，提供第六种通信装置。该通信装置可以为上述方法设计中的第二通信装置。示例性地，所述通信装置为设置在通信设备中的芯片。示例性地，所述通信设备为终端设备。该通信装置包括：存储器，用于存储计算机可执行程序代码；以及处理器，处理器与存储器耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使第六种通信装置执行上述第二方面或第二方面的任意一种可能的实施方式中的方法。
其中，第六种通信装置还可以包括通信接口，该通信接口可以是终端设备中的收发器，例如通过所述通信装置中的天线、馈线和编解码器等实现，或者，如果第六种通信装置为设置在终端设备中的芯片，则通信接口可以是该芯片的输入/输出接口，例如输入/输出管脚等。
第九方面，提供一种通信系统，该通信系统可以包括第三方面所述的第一种通信装置、第五方面所述的第三种通信装置或第七方面所述的第五种通信装置，以及包括第四方面所述的第二种通信装置、第六方面所述的第四种通信装置或第八方面所述的第六种通信装置。
第十方面，提供一种计算机存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计中所述的方法。
第十一方面，提供一种计算机存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第二方面或第二方面的任意一种可能的设计中所述的方法。
第十二方面，提供一种包含指令的计算机程序产品，所述计算机程序产品中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面或第一方面的任意一种可能的设计中所述的方法。
第十三方面，提供一种包含指令的计算机程序产品，所述计算机程序产品中存储有指令，当其在计算机上运行时，使得计算机执行上述第二方面或第二方面的任意一种可能的设计中所述的方法。
在本申请实施例中，第一参考信号无需与数据一同发送，那么在网络设备有需求时，终端设备可以单独向网络设备发送第一参考信号，提高了第一参考信号发送的灵活性。而正因为第一参考信号的发送较为灵活，因此终端设备可以多次向网络设备发送第一参考信号，网络设备也可以多次接收来自终端设备的第一参考信号，从而通过加强第一参考信号的覆盖，提升网络设备对于终端设备进行信道估计的准确性。
附图说明
图1为终端设备占用一个时隙中的一个OFDM符号发送DMRS的示意图；
图2为本申请实施例的一种应用场景示意图；
图3为本申请实施例提供的一种通信方法的流程图；
图4为两个时隙承载的DMRS序列的示意图；
图5为本申请实施例中一个时隙承载的第一参考信号的序列相同的示意图；
图6为本申请实施例中多个时隙承载的第一参考信号的序列相同的示意图；
图7为本申请实施例中终端设备根据DCI进行决策的示意图；
图8为本申请实施例中终端设备根据DCI的调度发送PUSCH或第一参考信号的一种示意图；
图9为本申请实施例提供的终端设备的示意性框图；
图10为本申请实施例提供的终端设备的另一示意性框图；
图11为本申请实施例提供的网络设备的示意性框图；
图12为本申请实施例提供的网络设备的另一示意性框图；
图13为本申请实施例提供的通信装置的示意性框图；
图14为本申请实施例提供的通信装置的另一示意性框图；
图15为本申请实施例提供的通信装置的再一示意性框图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括用户设备(user equipment，UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、车到一切(vehicle-to-everything，V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设 备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on-board unit，OBU)。
2)网络设备，例如包括接入网(access network，AN)设备，例如基站(例如，接入点)，可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备，或者例如，一种V2X技术中的接入网设备为路侧单元(road side unit，RSU)。基站可用于将收到的空中帧与网际协议(IP)分组进行相互转换，作为终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体，可以与支持V2X应用的其他实体交换消息。接入网设备还可协调对空口的属性管理。例如，接入网设备可以包括长期演进(long term evolution，LTE)系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(the 5th generation，5G)NR系统中的下一代节点B(next generation node B，gNB)或者也可以包括云接入网(cloud radio access network，Cloud RAN)系统中的集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)，本申请实施例并不限定。
当然网络设备还可以包括核心网设备，但因为本申请实施例提供的技术方案主要涉及的是接入网设备，因此在后文中，如无特殊说明，则后文所描述的“网络设备”均是指接入网设备。
3)“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度。例如，第一信息和第二信息，只是为了区分不同的信令，而并不是表示这两种信息的内容、优先级、发送顺序或者重要程度等的不同。
如上介绍了本申请实施例涉及的一些概念，下面介绍本申请实施例的技术特征。
在无线通信系统，如NR通信系统中，终端设备和基站之间交互的信息通过物理信道进行承载。其中，终端设备发送的上行数据，通常通过PUSCH承载；终端设备发送的上行控制信息，通常通过PUCCH承载。此外，终端设备还可以发送参考信号，基站通过接收来自终端设备的参考信号，可以估计终端设备在不同频率上的信道响应或信道质量。
在无线通信中，对于一些深覆盖的场景，例如小区边缘，或者地下室等，无线信号传播的路径损耗非常严重。在这种情况下，需要考虑覆盖增强手段，这对于上行传输尤为重要。因为终端设备的发送功率往往较低，例如为23dBm，远低于基站的发送功率(例如， 一个带宽为20MHz的基站，其典型的发送功率为46dBm)这将导致深覆盖场景下的终端设备发送的信号到达基站时非常微弱。而基站要根据来自终端设备的参考信号对终端设备的上行信道进行估计，如果基站无法接收来自终端设备的参考信号，或者所接收的来自终端设备的参考信号的强度较弱，则可能导致基站的信道估计结果不准确。如果基站的信道估计结果不准确，将严重影响基站对来自终端设备的上行数据的解调，从而很可能导致基站无法正确接收终端设备发出的数据信号。
目前在NR系统中，基站主要通过接收来自终端设备的解调参考信号(demodulation reference signal，DMRS)，对终端设备的上行信道进行信道估计。以终端设备在一个时隙(slot)中发送PUSCH为例，通常一个时隙包括14个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，则终端设备可以在其中的1～4个OFDM符号上发送DMRS，而在其余的OFDM符号上发送上行数据。这里是说，终端设备最多可以占用一个时隙的4个OFDM符号发送DMRS，至于究竟占用哪几个OFDM符号，目前已有具体的规定。
例如请参考图1，为终端设备占用一个时隙中的一个OFDM符号发送DMRS的示意图。首先，基站通过下行控制信息(downlink control information，DCI)调度终端设备，终端设备接收DCI后，向基站发送PUSCH。可以看到，终端设备占用了一个时隙中的第3个OFDM符号发送DMRS，也就是图1中的画斜线的区域所表示的OFDM符号，而该时隙中的其他的OFDM符号均用来发送上行数据。
在基站进行的一次调度中，从时域上看，既可以调度终端设备在一个时隙中传输，也可以调度终端设备在连续的多个时隙中传输。在一个时隙中，既可以调度终端设备使用所有OFDM符号传输，也可以调度终端设备使用其中的部分OFDM符号传输，图1是以调度终端设备使用一个时隙中的所有的OFDM符号传输为例。具体地，终端设备在哪些OFDM符号发送DMRS，取决于基站对终端设备的配置。
在NR系统中，调度终端设备传输PUSCH的DCI的格式(format)主要包括DCI格式0_0和DCI格式0_1。以DCI格式0_0为例，DCI格式0_0的DCI包括的字段可以参考表1：
表1
Figure PCTCN2020087636-appb-000001
Figure PCTCN2020087636-appb-000002
另外，除了通过DCI来调度之外，在NR系统中还有其他的数据调度方法。例如，可以通过配置授权(configured grant)或称为免授权(grant free)的方法，即，不需要通过DCI进行调度，基站可以通过无线资源控制(radio resource control，RRC)信令为终端设备配置传输资源，之后如果终端设备需要发送上行数据，则根据RRC信令所配置的资源进行发送即可，无需基站再通过DCI对其进行调度。
但无论是通过DCI动态调度的传输，还是通过配置授权所进行的传输，终端设备在发送DMRS时，都是需要和上行数据一起发送。那么，终端设备只会在有上行数据发送时才能发送参考信号。而终端设备向基站发送的上行数据一般不会太多，导致基站无法获得较多的参考信号。而在深覆盖场景中，终端设备发送的信号到达基站时很可能非常微弱，此时基站根据较少的参考信号对终端设备的上行信道进行估计，则很可能会使得估计的结果不够准确。如果基站对终端设备的上行信道的估计不够准确，则会影响对上行数据的解调等，从而很可能导致终端设备无法正确获得终端设备所发送的上行数据。因此，如何提高基站对终端设备的上行信道估计的准确性，是目前需要解决的问题。
鉴于此，提供本申请实施例的技术方案。在本申请实施例中，网络设备可以通过DCI指示仅传输第一参考信号，则终端设备接收DCI后可以仅向网络设备传输第一参考信号，从而第一参考信号无需与数据一同发送，那么在网络设备有需求时，终端设备可以单独向网络设备发送第一参考信号，提高了第一参考信号发送的灵活性。因为第一参考信号的发送较为灵活，因此终端设备可以多次向网络设备发送第一参考信号，网络设备也可以多次接收来自终端设备的第一参考信号，网络设备根据较多的第一参考信号对终端设备的上行信道进行估计，信道估计的准确性也就得到了提高。从而，本申请实施例通过提升了网络设备对于终端设备进行信道估计的准确性，增强了深覆盖下的终端设备的通信性能。
本申请实施例提供的技术方案可以应用于第四代移动通信技术(the 4th generation，4G)4G系统中，例如LTE系统，或可以5G系统中，例如NR系统，或者还可以应用于下一代移动通信系统或其他类似的通信系统，具体的不做限制。
下面介绍本申请实施例所应用的一种网络架构，请参考图2。
图2包括网络设备和终端设备，终端设备与一个网络设备连接。当然图2中的终端设 备的数量只是举例，在实际应用中，网络设备可以为多个终端设备提供服务。图2中的网络设备，以及多个终端设备中的部分终端设备或全部终端设备中的每个终端设备都可以实施本申请实施例所提供的技术方案。另外，图2中的终端设备以手机为例，在实际应用中不限于此。
图2中的网络设备例如为接入网设备，例如基站，或者也可以是RSU等设备。其中，基站在不同的系统对应不同的设备，例如在4G系统中可以对应eNB,在5G系统中可以对应gNB。当然本申请实施例所提供的技术方案也可以应用于未来的移动通信系统中，因此图2中的网络设备也可以对应未来的移动通信系统中的接入网设备。
下面结合附图介绍本申请实施例提供的技术方案。
本申请实施例提供第一种通信方法，请参见图3，为该方法的流程图。在下文的介绍过程中，以该方法应用于图2所示的网络架构为例。另外，该方法可由两个通信装置执行，这两个通信装置例如为第一通信装置和第二通信装置，其中，第一通信装置可以是网络设备或能够支持网络设备实现该方法所需的功能的通信装置，或者第一通信装置可以是终端设备或能够支持终端设备实现该方法所需的功能的通信装置，当然还可以是其他通信装置，例如芯片系统。对于第二通信装置也是同样，第二通信装置可以是网络设备或能够支持网络设备实现该方法所需的功能的通信装置，或者第二通信装置可以是终端设备或能够支持终端设备实现该方法所需的功能的通信装置，当然还可以是其他通信装置，例如芯片系统。且对于第一通信装置和第二通信装置的实现方式均不做限制，例如第一通信装置可以是网络设备，第二通信装置是终端设备，或者第一通信装置和第二通信装置都是网络设备，或者第一通信装置和第二通信装置都是终端设备，或者第一通信装置是网络设备，第二通信装置是能够支持终端设备实现该方法所需的功能的通信装置，等等。其中，网络设备例如为基站。
为了便于介绍，在下文中，以该方法由网络设备和终端设备执行为例，也就是说，以第一通信装置是网络设备、第二通信装置是终端设备为例。因为本实施例是以应用在图3所示的网络架构为例，因此，下文中所述的网络设备可以是图2所示的网络架构中的网络设备，下文中所述的终端设备可以是图2所示的网络架构中的终端设备。
S31、网络设备确定DCI，所述DCI仅用于指示终端设备发送第一参考信号。
第一参考信号可以是DMRS，或者DMRS也可以有其他的名称，或者第一参考信号也可以是其他的参考信号，例如探测参考信号(sounding reference signal，SRS)等，具体的不做限制，只需要终端设备发送的第一参考信号是网络设备预先知道的参考信号即可，网络设备可以根据接收到的第一参考信号，对终端设备的上行信道进行信道估计。
另外在本申请实施例中，所述的DCI仅用于指示终端设备发送第一参考信号，也可以描述为，DCI用于指示终端设备独立于上行数据来发送第一参考信号，或者说，第一参考信号的发送和上行数据的发送无关。也就是说，所述的DCI是仅用于调度第一参考信号的，而不用于调度上行数据。
作为DCI的一种可选的实施方式，在本申请实施例中，所述的DCI可以是专用于调度第一参考信号的DCI。可以理解为，所述的DCI的格式是本申请实施例所设计的，例如称为第一格式，只要网络设备发送第一格式的DCI，就表明该DCI仅用于指示终端设备发送第一参考信号。在这种情况下，终端设备在接收该DCI后，无需对该DCI进行过多的解析等操作，只需识别该DCI的格式为第一格式，就可以确定该DCI是仅用于指示终端设备发 送第一参考信号的，较为简单。
例如，网络设备可以为终端设备指示/配置第一无线网络临时标识(radio network tempory identity，RNTI)，并且网络设备使用该第一RNTI对第一格式的DCI的循环冗余校验(cyclic redundancy check,CRC)进行加扰，然后网络设备可以发送加扰后的第一格式的DCI。而终端设备接收到一个DCI并使用第一RNTI通过了该DCI的CRC校验时，终端设备即可确定其所接收的DCI为第一格式的DCI，由此可以进一步确定，需要根据该第一格式的DCI发送第一参考信号。
作为DCI的另一种可选的实施方式，在本申请实施例中，所述的DCI也可以复用目前已有的DCI。在当前的NR系统中，用于调度终端设备进行上行传输的DCI格式主要包括DCI格式0_0和DCI格式0_1，例如本申请实施例中的DCI就可以使用DCI格式0_0的DCI，或使用DCI格式0_1的DCI。或者本申请实施例中的DCI也可以复用目前已有的其他格式的DCI，具体的不做限制。
例如，DCI可以通过第一字段的取值来仅指示终端设备发送第一参考信号。例如，当第一字段的取值为第一值时，该DCI仅用于指示终端设备发送第一参考信号，或者，当第一字段的取值属于第一范围时，该DCI仅用于指示终端设备发送第一参考信号。第一字段例如为DCI中的调制和编码策略(modulation and coding scheme，MCS)字段，或者也可以是DCI中的其他字段，下面以MCS字段为例。
以本申请实施例中的DCI使用DCI格式0_0的DCI，或使用DCI格式0_1的DCI为例。无论是DCI格式0_0的DCI还是DCI格式0_1的DCI，其中均包括MCS字段。在DCI中，MCS字段的长度为5比特(bit)，这5比特的取值可以是“00000”,“00001”,“00010”,……,“11110”，“11111”。这5比特最多可以有32个取值，也就最多可以表示32种状态。终端设备根据一些RRC信令的配置，可以使用“00000”～“11100”这29个状态指示不同的调制阶数与编码码率组合，或者，可以使用“00000”～“11011”这28个状态指示不同的调制阶数与编码码率。
以使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合为例。终端设备可以根据接收的DCI包括的MCS字段中的5比特的状态，通过查表2，确定该状态对应的调制阶数和编码码率。
表2
Figure PCTCN2020087636-appb-000003
Figure PCTCN2020087636-appb-000004
例如，当MCS字段指示的5比特的状态为2(即，5比特的取值为00010)时，通过查表2可知，对应的调制阶数为2，编码码率为193/1024。
可以看到，在表2中，存在若干个无效的状态，例如表2中标记为“reserved”的28～31(即，5比特对应的11100、11101、11110和11111)这4个状态就是无效的状态。而11100、11101、11110、11111，这4个值均可以称为预留值，或者称为预留状态或无效状态，所谓预留值、预留状态或者无效状态，可以理解为是不用于指示MCS的值或状态。
表2是以使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合为例，而如果使用MCS字段的“00000”～“11100”这29个状态指示不同的调制阶数与编码码率组合，则就会存在3个无效状态，即，5比特对应的11101、11110和11111这3个状态是无效的状态。而11101、11110、11111，这3个值均可以称为预留值。
因此，本申请实施例考虑可以利用MCS字段的这些预留值来使得DCI仅指示终端设备发送第一参考信号。例如，通过第一字段的取值为第一值来使得DCI仅指示终端设备发送第一参考信号，则第一值可以是MCS字段中的一个未使用的状态(无效状态)所对应的5比特的取值，或者说，第一值可以是MCS字段的预留值中的一个。根据前文的介绍可知，MCS字段的预留值可以包括如下的一个或它们的任意组合：11100、11101、11110或11111，第一值可以是其中的一个。例如，如果使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合，则预留值就包括11100、11101、11110或11111中的一个或多个；或者，如果使用MCS字段的“00000”～“11100”这29个状态指示不同的调制阶数与编码码率组合，则预留值就包括11101、11110或11111中的一个或多个。
例如，如果使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合，则第一值可以是“11100”、“11101”、“11110”或“11111”；或者，如果使用MCS字段的“00000”～“11100”这29个状态指示不同的调制阶数与编码码率组合，则第一值可以是“11101”、“11110”或“11111”。例如第一值为“11111”，那么，如果DCI包括的MCS字段的取值为“11111”，就表明该DCI仅用于指示发送第一参考信号。
以第一字段是MCS字段为例。通过MCS字段的取值为第一值来使得DCI仅指示终端设备发送第一参考信号，既利用了MCS字段的无效状态达到了指示终端设备发送第一参考信号的目的，提高了字段状态的利用率，并且没有在DCI中新增字段，避免了由于新增DCI载荷而导致的DCI解调性能下降。
或者通过第一字段的取值属于第一范围来使得DCI仅指示终端设备发送第一参考信号，则第一范围可以包括MCS字段中的一个或多个未使用的状态(无效状态)所对应的取值，或者说，第一范围可以包括MCS字段的预留值中的一个或多个。例如，如果使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合，则第一范围可以包括“11100”、“11101”、“11110”或“11111”中的一个或多个；或者，如果使用MCS字段的“00000”～“11100”这29个状态指示不同的调制阶数与编码码率组合，则第一范围可以包括“11101”、“11110”或“11111”中的一个或多个。例如第一范围包括“11101”、“11110”和“11111”，那么，如果DCI包括的MCS字段的取值为“11101”、“11110”或“11111”中的任意一个，都表明该DCI仅用于指示发送第一参考信号。
以第一字段是MCS字段为例。通过MCS字段的取值属于第一范围来使得DCI仅指示 终端设备发送第一参考信号，既可以利用MCS字段的无效状态，而且要使得DCI仅指示终端设备发送第一参考信号，MCS字段可以取多个值，方式较为灵活。
当然，第一字段可以不复用MCS字段，而是复用DCI中的其他字段，那么第一值相应的可以是其他字段的取值，或者第一范围相应的可以是其他字段的取值所构成的范围。或者，第一字段也可以是在所复用的已有的DCI中新增的字段，具体的不做限制，例如可以在DCI格式0_0或DCI格式0_1中新增一个1比特字段，该1比特的取值为0或1用于区分该DCI是调度PUSCH传输还是调度第一参考信号的传输。
一般来说，网络设备通常不需要对终端设备发送的参考信号进行调制或编解码，因此MCS字段通常对于参考信号的发送并没有实际的指示意义，因此本申请实施例复用MCS字段中的无效状态指示仅发送第一参考信号不仅提升了对于字段状态的利用率，并且也保证了对MCS字段的无效状态的使用不会造成调制和编码的错误。
另外，目前在NR系统中，终端设备发送的DMRS可以是通过Gold序列生成的，当生成DMRS所使用的Gold序列的多项式固定时，具体的DMRS序列是由初始相位C init确定的。对于PUSCH的传输，某一时隙中的某个OFDM符号承载的DMRS序列，是根据该时隙在一个无线帧中的索引(index)，以及该OFDM符号在该时隙中的索引确定的。具体的，DMRS序列的初始相位C init可以通过公式1确定：
Figure PCTCN2020087636-appb-000005
其中，
Figure PCTCN2020087636-appb-000006
为DMRS所在的时隙在一个无线帧中的索引，l为DMRS所在的OFDM符号在该时隙中的索引，
Figure PCTCN2020087636-appb-000007
为一个时隙所包括的时域符号数，n SCID为高层配置的参数，例如取值为0或1，
Figure PCTCN2020087636-appb-000008
为高层配置的参数，例如取值为0至65535之间，mod表示取模运算。在本申请实施例中，时域符号以OFDM符号为例。可以看到，DMRS序列的初始相位是由DMRS所在的时隙在一个无线帧中的索引，以及DMRS所在的OFDM符号在该OFDM符号所在的时隙中的索引共同确定的。这也表示，对于承载在不同时隙或不同的OFDM符号中的DMRS序列，是不同的。
可参考图4，为两个时隙承载的DMRS序列的示意图。在时隙0和时隙1中，都是通过OFDM符号3和OFDM符号10承载DMRS序列，在图4中，时隙0的OFDM符号3填充了竖线，时隙0的OFDM符号10填充了“/”，时隙1的OFDM符号3填充了“\”，时隙1的OFDM符号10填充了横线。通过这4个OFDM符号的不同的填充方式，表示这4个OFDM承载的DMRS序列是不同的。
如果不同的OFDM符号承载的DMRS序列不同，则网络设备在根据DMRS进行信道估计时，不能将不同的OFDM符号承载的DMRS序列进行简单地合并，而是只能根据每个OFDM符号承载的DMRS序列进行信道估计，再将各个信道估计的结果进行合并，这种方式可能会导致噪声的放大，不利于消噪。鉴于此，本申请实施例提出，可以令不同的时域符号承载的第一参考信号的序列相同。例如，可以令一个时隙所包括的时域符号承载的第一参考信号的序列相同，或者，可以令多个时隙所包括的时域符号承载的第一参考信号的序列都相同。如果两个时域符号承载的第一参考信号的序列相同，并且终端设备与网络设备之间的信道变化较慢时，则网络设备可以将这两个时域符号承载的第一参考信号的 序列进行合并，再根据合并后的信号进行信道估计，有助于减小噪声，提高信道估计的准确性。在本申请实施例中，时域符号可以是OFDM符号。
那么，作为一种可选的实施方式，第一值除了可以指示仅传输第一参考信号之外，还可以指示，用于传输第一参考信号的每个时域符号上，所承载的第一参考信号的序列的初始相位的确定方式。或者说，第一字段的不同取值可以对应不同的初始相位确定方式，用于发送第一参考信号的时域符号上，所承载的第一参考信号的序列的初始相位的确定方式，与第一字段的取值对应。终端设备在接收该DCI后，可以根据第一字段的取值确定，用于发送第一参考信号的时域符号上，所承载的第一参考信号的序列的初始相位的确定方式。
在本申请实施例中，第一参考信号承载在至少两个时隙中，至少两个时隙承载的第一参考信号的序列的初始相位相同，或不同。因为序列的初始相位相同，就可以认为两个序列相同，那么通过令不同的OFDM符号上的序列的初始相位相同，也就可以使得不同的OFDM符号承载的序列相同，而通过令不同的OFDM符号上的序列的初始相位不同，也就可以使得不同的OFDM符号承载的序列不同。
在本申请实施例中，所述的初始相位的确定方式，可以包括第一种初始相位确定方式、第二种初始相位确定方式或第三种初始相位确定方式中的一种。
1、第一种初始相位确定方式。
如果是分别确定用于传输第一参考信号的每个时域符号上承载的第一参考信号的序列的初始相位，那么第一种初始相位确定方式可以是，根据用于传输第一参考信号的每个时域符号所在的时隙在无线帧中的索引，以及所述每个时域符号所在的时隙中的第一时域符号的索引，确定所述每个时域符号上所承载的第一参考信号的序列的初始相位。第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为时隙中的首个时域符号，或者为时隙中的最后一个时域符号，或者为时隙中的第一个用于承载第一参考信号的序列的时域符号，或者也可以是时隙中的任意一个时域符号，等等，具体的可以通过协议预定义，或者由网络设备配置。
例如，用于传输第一参考信号的时隙包括时隙0和时隙1，在时隙0和时隙1中都是通过OFDM符号3和OFDM符号10传输第一参考信号。则在时隙0中，首个承载第一参考信号的OFDM符号为OFDM符号3，在时隙1中，首个承载第一参考信号的OFDM符号为符号3。那么，时隙0的OFDM符号3承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙0的OFDM符号10承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙1的OFDM符号3承载的第一参考信号的序列，可以根据时隙1在无线帧中的索引(例如索引为1)、以及OFDM符号3在时隙1中的索引(例如索引为3)确定，时隙1的OFDM符号10承载的第一参考信号的序列，可以根据时隙1在无线帧中的索引(例如索引为1)、以及OFDM符号3在时隙1中的索引(例如索引为3)确定。可以看到，时隙0的OFDM符号3承载的第一参考信号的序列的初始相位和时隙0的OFDM符号10承载的第一参考信号的序列的初始相位，确定方式是一样的，时隙1的OFDM符号3承载的第一参考信号的序列的初始相位和时隙1的OFDM符号10承载的第一参考信号的序列的初始相位，确定方式也是一样的，表示时隙0的OFDM符号3和OFDM符号10承载的第一参考信号的序列的初始相位相同，时隙1的OFDM符号3和OFDM符号10承载的第一参考信号的序 列的初始相位相同。
可参考图5。在图5中，时隙0的OFDM符号3和OFDM符号10填充了横线，时隙1的OFDM符号3和OFDM符号10填充了“/”，表示时隙0的OFDM符号3和OFDM符号10承载的第一参考信号的序列的初始相位相同，时隙1的OFDM符号3和OFDM符号10承载的第一参考信号的序列的初始相位相同。
可以看到，在第一种初始相位确定方式下，一个时隙中的时域符号所承载的第一参考信号的序列是相同的。这里所述的，一个时隙中的时域符号，是指该时隙中用于承载第一参考信号的时域符号，一个时隙中用于承载第一参考信号的时域符号的数量可以是一个或多个。那么无论对于网络设备还是终端设备来说，也可能并不是分别确定用于传输第一参考信号的每个时域符号上承载的第一参考信号的序列的初始相位，而是确定用于传输第一参考信号的每个时隙承载的第一参考信号的序列的初始相位即可。也就是说，对于用于传输第一参考信号的每个时隙，可以只需确定一次所承载的第一参考信号的序列的初始相位，因为一个时隙中的每个时域符号所承载的第一参考信号的序列的初始相位都相同，因此只需针对一个时隙确定第一参考信号的序列的初始相位即可。如果是这种情况，那么第一种初始相位确定方式也可以描述为，根据至少两个时隙中的第一时隙的索引，以及第一时隙中的第一时域符号的索引，确定第一时隙中的第一参考信号的序列的初始相位。
第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为时隙中的首个时域符号，或者为时隙中的最后一个时域符号，或者为时隙中的第一个用于承载第一参考信号的序列的时域符号，或者也可以是时隙中的任意一个时域符号，等等，具体的可以通过协议预定义，或者由网络设备配置。因为第一种初始相位确定方式下的“第一时隙”可以是至少两个时隙中的任意一个时隙，因此第一时域符号也可以不是针对某个时隙“预定义”的，而是对于所有的时隙都可以适用。例如第一时域符号是时隙中的首个时域符号，那么如果第一时隙为时隙0，则第一时域符号就是时隙0中的首个时域符号，而如果第一时隙为时隙1，则第一时域符号就是时隙1中的首个时域符号。
例如，用于传输第一参考信号的时隙包括时隙0和时隙1，则时隙0承载的第一参考信号的序列的初始相位可以根据时隙0在无线帧中的索引，以及时隙0中的第一时域符号的索引确定。而时隙0承载的第一参考信号的序列的初始相位，也就是时隙0中的每个用于承载第一参考信号的序列的时域符号所承载的第一参考信号的序列的初始相位。时隙1承载的第一参考信号的序列的初始相位可以根据时隙1在无线帧中的索引，以及时隙1中的第一时域符号的索引确定。而时隙1承载的第一参考信号的序列的初始相位，也就是时隙1中的每个用于承载第一参考信号的序列的时域符号所承载的第一参考信号的序列的初始相位。对此可继续参考图5，图5中时隙0的OFDM符号3和OFDM符号10承载的第一参考信号的序列的初始相位相同，时隙1的OFDM符号3和OFDM符号10承载的第一参考信号的序列的初始相位相同。
因此，如果采用第一种初始相位确定方式，可以使得一个时隙中的OFDM符号所承载的第一参考信号的序列相同。则网络设备可以将时隙0的两个OFDM符号承载的第一参考信号的序列进行合并，根据合并后的信号进行信道估计，以及将时隙1的两个OFDM符号承载的第一参考信号的序列进行合并，根据合并后的信号进行信道估计，再将两个信道估计结果进行合并。这种信道估计的方式有助于减小噪声，提高信道估计的准确性。
2、第二种初始相位确定方式。
如果是分别确定用于传输第一参考信号的每个时域符号上承载的第一参考信号的序列的初始相位，那么第二种初始相位确定方式可以是，用于传输第一参考信号的每个时域符号上所承载的第一参考信号的序列的初始相位，根据承载第一参考信号的第一时域符号所在的时隙在无线帧中的索引，以及承载第一参考信号的第一时域符号在所在的时隙中的索引确定。第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为承载第一参考信号的首个时域符号，或者为承载第一参考信号的最后一个时域符号，或者为承载第一参考信号的除了首个时域符号和最后一个时域符号之外的其他的时域符号等，具体的可以通过协议预定义，或者由网络设备配置。
例如，用于传输第一参考信号的时隙包括时隙0和时隙1，在时隙0和时隙1中都是通过OFDM符号3和OFDM符号10传输第一参考信号。则在时隙0和时隙1中，首个承载第一参考信号的OFDM符号为时隙0的OFDM符号3。那么，时隙0的OFDM符号3承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙0的OFDM符号10承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙1的OFDM符号3承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙1的OFDM符号10承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定。可以看到，时隙0的OFDM符号3承载的第一参考信号的序列的初始相位、时隙0的OFDM符号10承载的第一参考信号的序列的初始相位、时隙1的OFDM符号3承载的第一参考信号的序列的初始相位、和时隙1的OFDM符号10承载的第一参考信号的序列的初始相位，确定方式都是一样的，表示时隙0的OFDM符号3承载的第一参考信号的序列的初始相位、时隙0的OFDM符号10承载的第一参考信号的序列的初始相位、时隙1的OFDM符号3承载的第一参考信号的序列的初始相位、和时隙1的OFDM符号10承载的第一参考信号的序列的初始相位均相同。
可参考图6。在图6中，时隙0的OFDM符号3、时隙0的OFDM符号10、时隙1的OFDM符号3和时隙1的OFDM符号10均填充了“/”，表示时隙0的OFDM符号3、时隙0的OFDM符号10、时隙1的OFDM符号3和时隙1的OFDM符号10承载的第一参考信号的序列的初始相位均相同。
可以看到，在第二种初始相位确定方式下，用于传输第一参考信号的至少两个时隙中的时域符号所承载的第一参考信号的序列都是相同的。这里所述的，至少两个时隙中的时域符号，是指至少两个时隙中用于承载第一参考信号的时域符号，至少两个时隙中用于承载第一参考信号的时域符号的数量可以是一个或多个。那么无论对于网络设备还是终端设备来说，也可能并不是分别确定用于传输第一参考信号的每个时域符号上承载的第一参考信号的序列的初始相位，而是确定用于传输第一参考信号的至少两个时隙承载的第一参考信号的序列的初始相位即可。也就是说，对于用于传输第一参考信号的至少两个时隙，可以只需确定一次所承载的第一参考信号的序列的初始相位，因为至少两个时隙中的每个时域符号所承载的第一参考信号的序列的初始相位都相同，因此只需针对至少两个时隙统一确定第一参考信号的序列的初始相位即可。如果是这种情况，那么第二种初始相位确定方式也可以描述为，根据至少两个时隙中的第一时隙的索引，以及第一时隙中的第一时域符 号的索引，确定至少两个时隙中的第一参考信号的序列的初始相位，第一时隙为至少两个时隙中的预定义的时隙。
第一时隙可以是预定义的时隙，例如第一时隙预定义为至少两个时隙中的首个时隙，或者为至少两个时隙中的最后一个时隙，或者为至少两个时隙中的除了首个时隙和最后一个时隙之外的其他时隙等，具体的可以由协议规定，或者由网络设备配置。第一时域符号可以是预定义的时域符号，例如第一时域符号预定义为第一时隙中的首个时域符号，或者为第一时隙中的最后一个时域符号，或者为第一时隙中的第一个用于承载第一参考信号的序列的时域符号，或者也可以是第一时隙中的任意一个时域符号，等等，具体的可以通过协议预定义，或者由网络设备配置。
例如，用于传输第一参考信号的时隙包括时隙0和时隙1，第一时隙为时隙0。则时隙0承载的第一参考信号的序列的初始相位可以根据时隙0在无线帧中的索引，以及时隙0中的第一时域符号的索引确定。而时隙0承载的第一参考信号的序列的初始相位，也就是时隙0中的每个用于承载第一参考信号的序列的时域符号所承载的第一参考信号的序列的初始相位。时隙1承载的第一参考信号的序列的初始相位，可以根据时隙0在无线帧中的索引，以及时隙0中的第一时域符号的索引确定。而时隙1承载的第一参考信号的序列的初始相位，也就是时隙1中的每个用于承载第一参考信号的序列的时域符号所承载的第一参考信号的序列的初始相位。对此可继续参考图6，在图6中，时隙0的OFDM符号3、时隙0的OFDM符号10、时隙1的OFDM符号3和时隙1的OFDM符号10承载的第一参考信号的序列的初始相位均相同。
因此，如果采用第二种初始相位确定方式，可以使得一次传输的第一参考信号所在的OFDM符号所承载的第一参考信号的序列相同。则网络设备可以将时隙0和时隙1的四个OFDM符号承载的第一参考信号的序列进行合并，再根据合并后的信号进行信道估计。这种信道估计的方式有助于减小噪声，提高信道估计的准确性。
3、第三种初始相位确定方式。
第三种初始相位确定方式需要分别确定用于传输第一参考信号的每个时域符号上承载的第一参考信号的序列的初始相位。第三种初始相位确定方式可以是，根据用于传输第一参考信号的每个时域符号所在的时隙的在无线帧中的索引，以及所述每个时域符号在所在的时隙中的索引，确定所述每个时域符号上所承载的第一参考信号的序列的初始相位。
例如，用于传输第一参考信号的时隙包括时隙0和时隙1，在时隙0和时隙1中都是通过OFDM符号3和OFDM符号10传输第一参考信号。那么，时隙0的OFDM符号3承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号3在时隙0中的索引(例如索引为3)确定，时隙0的OFDM符号10承载的第一参考信号的序列，可以根据时隙0在无线帧中的索引(例如索引为0)、以及OFDM符号10在时隙0中的索引(例如索引为10)确定，时隙1的OFDM符号3承载的第一参考信号的序列，可以根据时隙1在无线帧中的索引(例如索引为1)、以及OFDM符号3在时隙1中的索引(例如索引为3)确定，时隙1的OFDM符号10承载的第一参考信号的序列，可以根据时隙1在无线帧中的索引(例如索引为1)、以及OFDM符号10在时隙1中的索引(例如索引为10)确定。
对此可继续参考图4。在图4中，时隙0的OFDM符号3填充了竖线，时隙0的OFDM符号10填充了“/”，时隙1的OFDM符号3填充了“\”，时隙1的OFDM符号10填充了横 线。通过这4个OFDM符号的不同的填充方式，表示这4个OFDM承载的第一参考信号的序列各不相同。
这种方式类似于如前所介绍的根据公式1确定DMRS序列的初始相位的方式，通过这种初始相位确定方式所确定的第一参考信号的序列，不同的OFDM符号所承载的第一参考信号的序列是不同的。
例如，终端设备的信道条件变化较慢(例如终端设备的移动速度较慢，则可能信道条件变化较慢)时，可以使用第一种初始相位确定方式或第二种初始相位确定方式，使得多个OFDM符号承载的第一参考信号的序列相同，网络设备可以将多个OFDM符号承载的第一参考信号的序列合并后再统一进行信道估计，有助于减小噪声，且因为终端设备的信道条件变化较慢，因此也基本不会降低信道估计的准确性。而如果终端设备的信道条件变化较快(例如终端设备的移动速度较快，则可能信道条件变化较快)，则可以使用第三种初始相位确定方式，使得不同的OFDM符号承载的第一参考信号的序列不同，从而网络设备可以分别针对每个OFDM符号承载的第一参考信号的序列进行信道估计，以提高信道估计的准确性。而且使用第三种初始相位确定方式，如果有一个OFDM符号承载的第一参考信号的序列与邻区所发送的其他的序列之间的干扰较强，但因为不同的OFDM符号承载的第一参考信号的序列不同，则其他的OFDM符号承载的第一参考信号的序列与邻区所发送的序列之间的干扰可能会减小或消除，因此可以使得终端设备对邻区的干扰随机化，从而能够减小邻区的干扰，也尽量保证与同小区其他终端设备的参考信号有较好的互相关性能。
如果第一字段的取值除了指示仅传输第一参考信号之外，还需要指示初始相位的确定方式，那么可以适用于第一字段的取值属于第一范围的情况。例如第一范围可以包括多个取值，那么第一字段可以通过第一字段的任意一个取值来指示仅传输第一参考信号，以及可以通过第一范围中的不同的取值来指示相应的初始相位确定方式。或者，如果第一字段的取值除了指示仅传输第一参考信号之外，还需要指示初始相位的确定方式，也可以适用于第一字段的取值为第一值的情况，也就是说，如果第一字段的取值为第一值，则除了指示仅传输第一参考信号之外，还可以指示初始相位的确定方式。当然，如果第一字段的取值为第一值，则第一字段的取值也可以仅指示仅传输第一参考信号，而不用于指示初始相位的确定方式，在这种情况下，DCI可以无需指示初始相位的确定方式，终端设备可以按照现有的方式来确定第一参考信号的序列的初始相位，或者在这种情况下，初始相位确定方式可以通过协议预定义，或者由网络设备配置。
第一字段的取值究竟用于指示如上的哪种初始相位确定方式，可以由网络设备配置，或者通过协议规定等。或者，第一值除了可以指示如上三种确定方式中的一种之外，还可以指示其他的确定方式，具体的不做限制，只要所指示的确定方式能够确定用于传输第一参考信号的每个时域符号上，所承载的第一参考信号的序列的初始相位，即可。
例如，第一值为11111时，用于指示如上的第一种初始相位确定方式，第一值为11110时，用于指示如上的第二种初始相位确定方式，第一值为11101时，用于指示如上的第三种初始相位确定方式。当然这里只是举例，对于第一值与相应的初始相位确定方式之间的对应关系，本申请实施例不做限制。
通常而言，如果使用如上的第一种初始相位确定方式或第二种初始相位确定方式，则多个连续的、相同的第一参考信号的序列可以简单地进行能量合并检测，适合于终端设备的移动速度较慢、信道变化较慢的场景。而不同的第一参考信号的序列则不能简单地直接 能量合并，但可以使得终端设备对邻区的干扰随机化，也能保证与同小区其他终端设备的第一参考信号有较好的互相关性能。本申请实施例中，通过使用多个不同的无效状态指示终端设备仅发送第一参考信号时的序列的确定方式，使得网络设备对第一参考信号指示更加灵活，可以根据实际需要，指示终端设备在仅发送第一参考信号的过程中使用合适的发送方式。
S32、网络设备向终端设备发送所述DCI，终端设备接收来自网络设备的所述DCI，所述DCI仅用于指示终端设备发送第一参考信号。
S33、终端设备根据所述DCI发送所述第一参考信号。
如果DCI是本申请实施例所提供的第一格式的DCI，那么终端设备接收DCI后，如果确定该DCI为第一格式的DCI，就可以确定该DCI仅用于调度第一参考信号，而不用于调度上行数据。则终端设备可以根据该DCI的调度，向网络设备发送第一参考信号，此时，第一参考信号可以单独发送给网络设备，而无需与上行数据一同发送。
或者，如果DCI是复用了现有格式的DCI，且DCI是通过第一字段来仅指示终端设备发送第一参考信号，则终端设备接收DCI后，可以确定DCI所包括的第一字段的取值，如果第一字段的取值为第一值，或者第一字段的取值属于第一范围，则终端设备可以确定该DCI仅用于调度第一参考信号，而不用于调度上行数据。则终端设备可以根据该DCI的调度，向网络设备发送第一参考信号，此时，第一参考信号可以单独发送给网络设备，而无需与上行数据一同发送。
以第一字段是MCS字段为例。本申请实施例中，当终端设备接收到该DCI时，需要根据该DCI包括的MCS字段的状态(或者说，MCS字段的取值)确定该DCI所调度的内容，是调度该终端设备进行普通的PUSCH传输，还是仅调度该终端设备进行第一参考信号的传输。以DCI格式0_0、通过第一字段的取值为第一值来使得DCI仅指示终端设备发送第一参考信号、第一值为“11111”、第一参考信号为DMRS为例，终端设备的逻辑行为可参考图7。
即，接收到DCI格式0_0的DCI后，终端设备根据该DCI包括的MCS字段的取值，确定该DCI是正常调度PUSCH，还是调度终端设备仅传输DMRS。其中，如果MCS字段的其中属于00000～11011中的一个，则终端设备确定正常传输PUSCH；或者，如果MCS字段的取值属于11101～11110中的一个，则终端设备确定该DCI为无效的DCI；或者，如果MCS字段的其中为11111，则终端设备确定仅传输DMRS。这里是以使用MCS字段的“00000”～“11011”这28个状态指示不同的调制阶数与编码码率组合为例的。
本申请实施例复用了MCS字段中的无效状态指示仅传输第一参考信号，提升了字段状态的利用率。并且，发送参考信号通常不需要进行调制和编码，因此MCS字段通常对于参考信号的发送并没有指示意义，本申请实施例对MCS字段的使用不会造成调制和编码的错误。且本申请实施例的技术方案没有在DCI中新增额外的比特数，可以尽量保证DCI的解调性能，也不会增加系统的复杂度。
另外，如果终端设备确定该DCI仅指示发送第一参考信号，则终端设备还可以进一步确定用于发送第一参考信号的时域资源、频域资源或第一参考信号的发送功率中的至少一个。例如，可以确定用于发送第一参考信号的时域资源，或确定用于发送第一参考信号的频域资源，或，确定第一参考信号的发送功率，或，确定用于发送第一参考信号的时域资源、频域资源以及第一参考信号的发送功率，或，确定用于发送第一参考信号的时域资源 和第一参考信号的发送功率，或，确定用于发送第一参考信号的频域资源和第一参考信号的发送功率，或，确定用于发送第一参考信号的频域资源和频域资源，等等。
作为一种可选的实施方式，终端设备可以根据DCI所包括的除了第一字段之外的其他字段来确定发送第一参考信号的时域资源、频域资源或第一参考信号的发送功率中的至少一个。其中，DCI所包括的用于确定第一参考信号的时频资源的字段，可以包括时域资源分配字段、频域资源分配字段、跳频标示字段、或UL/SUL载波指示字段中的一个或多个。DCI所包括的用于确定第一参考信号的发送功率的字段，可以包括传输功率控制命令字段。例如，终端设备可以执行如下的一种或多种操作：
如果DCI包括时域资源分配字段，终端设备可以根据DCI包括的时域资源分配字段，确定第一参考信号占用的时域资源；如果DCI包括频域资源分配字段，终端设备可以根据DCI包括的频域资源分配字段，确定第一参考信号占用的频域资源；如果DCI包括跳频标示字段，终端设备可以根据DCI包括的跳频标示字段，确定第一参考信号是否进行跳频发送；如果DCI包括UL/SUL载波指示字段，终端设备可以根据DCI包括的UL/SUL载波指示字段，确定第一参考信号是在UL载波发送还是在SUL载波发送；如果DCI包括传输功率控制命令字段，终端设备可以根据DCI包括的传输功率控制命令字段，确定第一参考信号的发送功率。其中，如果跳频标示字段指示第一参考信号需要进行跳频发送，则终端设备可以根据预定义的规则，在发送的过程中使用特定的时频图样发送第一参考信号。
可参考图8，是终端设备根据DCI的调度发送PUSCH或第一参考信号的一种示例。如果终端设备接收到的DCI的MCS字段的取值为00000～11100中的一个，则终端设备确定正常发送PUSCH，并根据DCI包括的其他字段确定用于发送PUSCH的时频资源和PUSCH的发送功率等；而如果终端设备接收到的DCI的MCS字段的取值为11111，则终端设备确定仅发送第一参考信号(这里以第一值是11111为例)，并根据DCI包括的其他字段确定第一参考信号的时域资源、频域资源和第一参考信号的发送功率等。图8以PUSCH和第一参考信号都是以跳频方式发送为例。图8中，画横线的OFDM符号表示承载PUSCH的OFDM符号，画“/”的OFDM符号表示承载第一参考信号的OFDM符号。
在调度正常PUSCH传输时，所述的时域资源分配字段、频域资源分配字段、跳频标示字段、和UL/SUL载波指示字段可用于指示PUSCH的时频资源，所述的传输功率控制命令字段可用于指示PUSCH的发送功率。而本申请实施例中，如果DCI指示终端设备仅传输第一参考信号，则可以复用这些字段以及相关的指示方法来指示第一参考信号的时域资源、频域资源或发送功率中的一个或多个，则终端设备可以根据DCI所包括的字段确定时域资源、频域资源或发送功率中的一个或多个。这样处理，一方面使得第一参考信号的时频资源和发送功率的指示变得灵活，可以根据DCI动态指示，而不是仅可以通过RRC信令进行半静态配置；另一方面也保证了“仅传输第一参考信号”和“正常调度PUSCH”时的时频资源和发送功率的指示方式相同，有利于降低网络设备和终端设备的实现复杂度。
或者，终端设备也可以不根据DCI确定第一参考信号的时频资源和/或发送功率。例如，网络设备可以向终端设备发送RRC信令，该RRC信令可以用于配置第一参考信号的时域资源、频域资源或发送功率中的一个或多个，终端设备接收来自网络设备的RRC信令后就可以确定第一参考信号的时域资源、频域资源或发送功率中的一个或多个(终端设备所能够确定的，是网络设备通过RRC信令指示的。例如网络设备通过RRC信令指示了第一参考信号的时域资源，则终端设备就能根据RRC信令确定第一参考信号的时域资源， 而如果网络设备通过RRC信令未指示第一参考信号的时域资源，终端设备根据RRC信令就无法确定第一参考信号的时域资源)。当终端设备接收到仅用于指示传输第一参考信号的DCI时，可以根据RRC信令的配置确定第一参考信号的时域资源、频域资源或发送功率中的一个或多个。例如可以确定第一参考信号的时域资源，或确定第一参考信号的频域资源，或确定第一参考信号的发送功率，或确定第一参考信号的时域资源和频域资源，或确定第一参考信号的时域资源和发送功率，或确定第一参考信号的频域资源和发送功率，或确定第一参考信号的时域资源、频域资源和发送功率。
在这种方式下，网络设备通过半静态的方式配置仅发送第一参考信号时第一参考信号所占用的资源，则网络设备在DCI里可以不指示第一参考信号的资源。那么网络设备可以将DCI里用于指示资源的字段(所述的时域资源分配字段、频域资源分配字段、跳频标示字段、UL/SUL载波指示字段或传输功率控制命令字段中的一个或多个)全部置“1”或全部置“0”，那么终端设备接收DCI后，如果确定这些字段都是0或都是1，就可以确定对DCI的接收正确，否则可能该DCI接收错误(包括传输错误或解调错误等)，相当于增强了终端设备的纠错性能。
终端设备根据如上所介绍的方式确定第一参考信号的时域资源、频域资源或发送功率之后，可以根据所确定的信息发送第一参考信号，则网络设备可以接收来自终端设备的第一参考信号。网络设备接收第一参考信号后，可以根据第一参考信号对终端设备的上行信道进行信道估计，或者还可以进行其他的操作，本申请实施例对于网络设备对第一参考信号的利用方式不做限制。
另外，网络设备除了通过S32向终端设备发送所述的DCI之外，可能还向终端设备发送其他的DCI，其他的DCI可能会调度终端设备向网络设备发送PUSCH，或者发送其他的参考信号等，则终端设备也会根据其他的DCI向网络设备发送相应的信息，这里不做限制。
在前文的介绍过程中，如果所述的DCI复用已有格式的DCI，则均以复用了DCI格式0_0的DCI为例，本领域技术人员可以明确的是，本申请实施例提供的技术方案同样也适用于DCI格式0_1的DCI或其他已有格式的DCI。
本申请实施例使能了传输数据与参考信号的解耦合，也即使得数据与参考信号是可以分别发送的。网络设备可以通过DCI单独指示终端设备发送第一参考信号，以增强信道估计性能，而无需仅靠PUSCH中的DMRS进行信道估计。例如，在深覆盖的场景中，网络设备可以多次仅指示终端设备发送第一参考信号，从而网络设备可以获得较多的第一参考信号，以提高信道估计的准确性。通过本申请实施例提供的方法，使得网络设备可以在不改变现有DCI的长度和格式的基础上，灵活指示终端设备发送第一参考信号，提升网络设备的信道估计性能，从而提升通信系统的覆盖性能，并且复杂度较低，可行性强。
下面结合附图介绍本申请实施例中用来实现上述方法的装置。因此，上文中的内容均可以用于后续实施例中，重复的内容不再赘述。
图9为本申请实施例提供的通信设备900的示意性框图。示例性地，通信设备900例如为终端设备900。终端设备900包括处理模块910和收发模块920。其中，处理模块910可以用于执行图3所示的实施例中由终端设备所执行的除了收发操作之外的全部操作，例如确定所接收的DCI仅用于指示终端设备发送第一参考信号的步骤，和/或用于支持本文所描述的技术的其它过程。收发模块920可以用于执行图3所示的实施例中由终端设备所 执行的全部收发操作，例如S32和S33，和/或用于支持本文所描述的技术的其它过程。
收发模块920，用于接收下行控制信息DCI，所述DCI仅用于指示终端设备900发送第一参考信号；
处理模块910，用于确定所述DCI仅指示终端设备900发送第一参考信号；
收发模块920，还用于根据所述DCI发送所述第一参考信号。
作为一种可选的实施方式，所述DCI不用于调度数据。
作为一种可选的实施方式，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备900发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
作为一种可选的实施方式，所述第一字段为MCS字段。
作为一种可选的实施方式，所述第一范围包括如下取值中的至少两个：
11100；
11101；
11110；或，
11111。
作为一种可选的实施方式，所述第一值为11100、11101、11110、或11111。
作为一种可选的实施方式，所述第一字段的不同取值对应不同的初始相位确定方式，处理模块910用于：
根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
作为一种可选的实施方式，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
作为一种可选的实施方式，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：
根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
作为一种可选的实施方式，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：
根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
作为一种可选的实施方式，处理模块910还用于：
根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
作为一种可选的实施方式，收发模块920，还用于接收来自所述网络设备的RRC信令，并根据所述RRC信令确定所述第一参考信号所占用的时域资源、频域资源和发送功率中 的一个或多个。
作为一种可选的实施方式，所述DCI的格式为DCI格式0_0或DCI格式0_1。
应理解，本申请实施例中的处理模块910可以由处理器或处理器相关电路组件实现，收发模块920可以由收发器或收发器相关电路组件实现。
如图10所示，本申请实施例还提供一种通信设备1000。示例性地，通信设备1000例如为终端设备1000。终端设备1000包括处理器1010，存储器1020与收发器1030，其中，存储器1020中存储指令或程序，处理器1010用于执行存储器1020中存储的指令或程序。存储器1020中存储的指令或程序被执行时，该处理器1010用于执行上述实施例中处理模块910执行的操作，收发器1030用于执行上述实施例中收发模块920执行的操作。
应理解，根据本申请实施例的终端设备900或终端设备1000可对应于图3所示的实施例中的终端设备，并且终端设备900或终端设备1000中的各个模块的操作和/或功能分别为了实现图3所示的实施例中的相应流程，为了简洁，在此不再赘述。
图11为本申请实施例提供的通信设备1100的示意性框图。示例性地，通信设备1100例如为网络设备1100。网络设备1100包括处理模块1110和收发模块1120。其中，处理模块1110可以用于执行图3所示的实施例中由网络设备所执行的除了收发操作之外的全部操作，例如S31，和/或用于支持本文所描述的技术的其它过程。收发模块1120可以用于执行图3所示的实施例中由网络设备所执行的全部收发操作，例如S32和S33，和/或用于支持本文所描述的技术的其它过程。
处理模块1110，用于确定DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
收发模块1120，用于向终端设备发送所述DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
收发模块1120，还用于接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
作为一种可选的实施方式，所述DCI不用于调度数据。
作为一种可选的实施方式，所述DCI包括第一字段；其中，
当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
作为一种可选的实施方式，所述第一字段为MCS字段。
作为一种可选的实施方式，所述第一范围包括如下取值中的至少两个：
11100；
11101；
11110；或，
11111。
作为一种可选的实施方式，所述第一值为11100、11101、11110、或11111。
作为一种可选的实施方式，所述第一字段的不同取值对应不同的初始相位确定方式，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式，与所述第一字段的取值对应。
作为一种可选的实施方式，所述第一参考信号承载在至少两个时隙中，所述至少两个 时隙承载的所述第一参考信号的序列的初始相位相同或不同。
作为一种可选的实施方式，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：
根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
作为一种可选的实施方式，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：
根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
作为一种可选的实施方式，所述DCI还包括时域资源分配资源、频域资源分配资源或传输功率控制命令字段中的一个或多个，其中，
所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
作为一种可选的实施方式，收发模块1120，还用于向所述终端设备发送RRC信令，所述RRC信令用于指示所述第一参考信号所占用的时域资源、频域资源和发送功率中的一个或多个。
作为一种可选的实施方式，所述DCI的格式为DCI格式0_0或DCI格式0_1。
应理解，本申请实施例中的处理模块1110可以由处理器或处理器相关电路组件实现，收发模块1120可以由收发器或收发器相关电路组件实现。
如图12所示，本申请实施例还提供一种通信设备1200。示例性地，通信设备1200例如为网络设备1200。网络设备1200包括处理器1210，存储器1220与收发器1230，其中，存储器1220中存储指令或程序，处理器1210用于执行存储器1220中存储的指令或程序。存储器1220中存储的指令或程序被执行时，该处理器1210用于执行上述实施例中处理模块1110执行的操作，收发器1230用于执行上述实施例中收发模块1120执行的操作。
应理解，根据本申请实施例的网络设备1100或网络设备1200可对应于图3所示的实施例中的网络设备，并且网络设备1100或网络设备1200中的各个模块的操作和/或功能分别为了实现图3所示的实施例中的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供一种通信装置，该通信装置可以是终端设备也可以是电路。该通信装置可以用于执行上述图3所示的方法实施例中由终端设备所执行的动作。
当该通信装置为终端设备时，图13示出了一种简化的终端设备的结构示意图。便于理解和图示方便，图13中，终端设备以手机作为例子。如图13所示，终端设备包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电 路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图13中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发单元，将具有处理功能的处理器视为终端设备的处理单元。如图13所示，终端设备包括收发单元1310和处理单元1320。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元1310中用于实现接收功能的器件视为接收单元，将收发单元1310中用于实现发送功能的器件视为发送单元，即收发单元1310包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元1310用于执行上述图3所示的方法实施例中终端设备侧的发送操作和接收操作，处理单元1320用于执行上述图3所示的方法实施例中终端设备侧除了收发操作之外的其他操作。
例如，在一种实现方式中，收发单元1310用于执行图3所示的实施例中的终端设备侧的收发步骤，例如S32和S33，和/或用于支持本文所描述的技术的其它过程。处理单元1320，用于执行图3所示的实施例中的终端设备侧除了收发操作之外的其他操作，例如确定DCI仅用于指示终端设备发送第一参考信号的步骤，和/或用于支持本文所描述的技术的其它过程。
当该通信装置为芯片时，该芯片包括收发单元和处理单元。其中，收发单元可以是输入输出电路、通信接口；处理单元为该芯片上集成的处理器或者微处理器或者集成电路。
本申请实施例中的通信装置为终端设备时，可以参照图14所示的设备。作为一个例子，该设备可以完成类似于图10中处理器1010的功能。在图14中，该设备包括处理器1410，发送数据处理器1420，接收数据处理器1430。上述实施例中的处理模块910可以是图14中的该处理器1410，并完成相应的功能；上述实施例中的收发模块920可以是图14中的发送数据处理器1420，和/或接收数据处理器1430。
虽然图14中示出了信道编码器、信道解码器，但是可以理解这些模块并不对本实施例构成限制性说明，仅是示意性的。
图15示出本实施例的另一种形式。处理装置1500中包括调制子系统、中央处理子系统、周边子系统等模块。本实施例中的通信装置可以作为其中的调制子系统。具体的，该调制子系统可以包括处理器1503，接口1504。其中，处理器1503完成上述处理模块910的功能，接口1504完成上述收发模块920的功能。作为另一种变形，该调制子系统包括存储器1506、处理器1503及存储在存储器1506上并可在处理器上运行的程序，该处理器1503执行该程序时实现上述图3所示的方法实施例中终端设备侧的方法。需要注意的是，所述存储器1506可以是非易失性的，也可以是易失性的，其位置可以位于调制子系统内部，也可以位于处理装置1500中，只要该存储器1506可以连接到所述处理器1503即可。
本申请实施例还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时可以实现上述方法实施例提供的图3所示的实施例中与终端设备相关的流程。
本申请实施例还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时可以实现上述方法实施例提供的图3所示的实施例中与网络设备相关的流程。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被执行时执行上述图3所示的方法实施例中终端设备侧的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被执行时执行上述图3所示的方法实施例中网络设备侧的方法。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组 件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (28)

  1. 一种通信方法，其特征在于，包括：
    向终端设备发送DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
    接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
  2. 根据权利要求1所述的方法，其特征在于，所述DCI还包括时域资源分配资源字段、频域资源分配资源字段或传输功率控制命令字段中的一个或多个，其中，
    所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
    所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
    所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
  3. 一种通信方法，其特征在于，包括：
    接收下行控制信息DCI，所述DCI仅用于指示终端设备发送第一参考信号；
    所述终端设备根据所述DCI发送所述第一参考信号。
  4. 根据权利要求1～3任一项所述的方法，其特征在于，所述DCI不用于调度数据。
  5. 根据权利要求1～4任一项所述的方法，其特征在于，所述DCI包括第一字段；其中，
    当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
    当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
  6. 根据权利要求5所述的方法，其特征在于，所述第一字段为调制与编码策略MCS字段。
  7. 根据权利要求5或6所述的方法，其特征在于，所述第一范围包括如下取值中的至少两个：
    11100；
    11101；
    11110；或，
    11111。
  8. 根据权利要求6或7所述的方法，其特征在于，所述第一值为11100、11101、11110、或11111。
  9. 根据权利要求5～8任一项所述的方法，其特征在于，所述第一字段的不同取值对应不同的初始相位确定方式，所述方法还包括：
    根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
  10. 根据权利要求9所述的方法，其特征在于，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
  11. 根据权利要求10所述的方法，其特征在于，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：
    根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为 所述至少两个时隙中的预定义的时隙。
  12. 根据权利要求10所述的方法，其特征在于，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：
    根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
  13. 根据权利要求3～12任一项所述的方法，其特征在于，所述方法还包括如下的一项或它们的任意组合：
    根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
    根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
    根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
  14. 一种通信设备，其特征在于，包括：
    处理器，用于确定DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
    收发器，用于向终端设备发送所述DCI，所述DCI仅用于指示所述终端设备发送第一参考信号；
    所述收发器，还用于接收来自所述终端设备的通过所述DCI指示的所述第一参考信号。
  15. 根据权利要求14所述的通信设备，其特征在于，所述DCI还包括时域资源分配资源字段、频域资源分配资源字段或传输功率控制命令字段中的一个或多个，其中，
    所述时域资源分配字段用于指示所述第一参考信号所占用的时域资源；
    所述频域资源分配字段用于指示所述第一参考信号所占用的频域资源；
    所述传输功率控制命令字段用于指示所述第一参考信号的发送功率。
  16. 一种通信设备，其特征在于，包括：
    收发器，用于接收DCI，所述DCI仅用于指示终端设备发送第一参考信号；
    处理器，用于确定所述DCI仅指示终端设备发送第一参考信号；
    所述收发器，还用于根据所述DCI发送所述第一参考信号。
  17. 根据权利要求14～16任一项所述的通信设备，其特征在于，所述DCI不用于调度数据。
  18. 根据权利要求14～17任一项所述的通信设备，其特征在于，所述DCI包括第一字段；其中，
    当所述第一字段的取值为第一值时，所述DCI仅用于指示终端设备发送第一参考信号；或，
    当所述第一字段的取值属于第一范围时，所述DCI仅用于指示终端设备发送第一参考信号。
  19. 根据权利要求18所述的通信设备，其特征在于，所述第一字段为调制与编码策略MCS字段。
  20. 根据权利要求18或19所述的通信设备，其特征在于，所述第一范围包括如下取值中的至少两个：
    11100；
    11101；
    11110；或，
    11111。
  21. 根据权利要求18或19所述的通信设备，其特征在于，所述第一值为11100、11101、11110、或11111。
  22. 根据权利要求18～21任一项所述的通信设备，其特征在于，所述第一字段的不同取值对应不同的初始相位确定方式，所述处理器，还用于根据所述第一字段的取值确定，用于发送所述第一参考信号的时域符号上，所承载的所述第一参考信号的序列的初始相位的确定方式。
  23. 根据权利要求22所述的通信设备，其特征在于，所述第一参考信号承载在至少两个时隙中，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同或不同。
  24. 根据权利要求23所述的通信设备，其特征在于，所述至少两个时隙承载的所述第一参考信号的序列的初始相位相同，所述确定方式包括：
    根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述至少两个时隙中的所述第一参考信号的序列的初始相位，所述第一时隙为所述至少两个时隙中的预定义的时隙。
  25. 根据权利要求23所述的通信设备，其特征在于，所述至少两个时隙承载的所述第一参考信号的序列的初始相位不同，所述确定方式包括：
    根据所述至少两个时隙中的第一时隙的索引，以及所述第一时隙中的第一时域符号的索引，确定所述第一时隙中的所述第一参考信号的序列的初始相位。
  26. 根据权利要求16～25任一项所述的通信设备，其特征在于，所述处理器还用于执行如下的一项或它们的任意组合：
    根据所述DCI包括的时域资源分配字段，确定所述第一参考信号所占用的时域资源；
    根据所述DCI包括的频域资源分配字段，确定所述第一参考信号所占用的频域资源；或，
    根据所述DCI包括的传输功率控制命令字段，确定所述第一参考信号的发送功率。
  27. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1、2、4～12中任意一项所述的方法，或使得所述计算机执行如权利要求3～13中任意一项所述的方法。
  28. 一种芯片系统，其特征在于，所述芯片系统包括：
    存储器：用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得安装有所述芯片系统的通信设备执行如权利要求1、2、4～12中任意一项所述的方法，或使得所述通信设备执行如权利要求3～13中任意一项所述的方法。
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