WO2021030983A1 - Method and apparatus for transmitting reference signal - Google Patents

Abstract

The present application provides a method and apparatus for transmitting a reference signal capable of solving the problem of insufficient DMRS transmission resources, so as to improve the reliability of transmitting the DMRS. The method and apparatus can be applied to 4G or 5G communication systems, such as LTE and NR. The method comprises: a network device sends a demodulation reference signal to a terminal device on a first symbol. The first symbol is determined by symbols respectively occupied by a synchronization signal block, a system message and a data channel. The first symbol can be a symbol, that is not occupied by the synchronization signal block and the system message, in the symbols occupied by the data channel.

Description

Reference signal transmission method and device Technical field

This application relates to the field of communications, and in particular to a method and device for transmitting a reference signal.

Background technique

The existing new radio (NR) protocol stipulates that among the symbols occupied by the physical downlink shared channel (PDSCH), the demodulation reference signal (DMRS) can only occupy 1 symbol (symbol) ), such as the third or fourth symbol (ie, symbol 2 or symbol 3), or in the remaining system information control resource set (remaining system information control resource set, RMSI CORESET, that is, the physical downlink control channel of Type 0) After the symbols occupied by the physical downlink control channel (PDCCH, collectively referred to as CORESET hereinafter) and before the symbols occupied by the synchronization signal block (synchronization signal block, SSB), the DMRS cannot interact with the SSB and CORESET occupies the same symbol. Among them, CORESET needs to occupy the first 1 or 2 symbols, such as symbol 0, or symbol 0 and symbol 1, and SSB also needs to occupy 4 consecutive symbols, such as symbol 2-symbol 5. Assume that PDSCH occupies symbol 0-symbol 6, and CORESET only needs to occupy symbol 0, so DMRS can and can only occupy symbol 1.

However, if in the above example, CORESET needs to occupy the first two symbols, namely symbol 0 and symbol 1, then all the symbols that can be occupied by DMRS have been occupied by CORESET and SSB, resulting in the failure of normal transmission of DMRS.

Summary of the invention

The embodiments of the present application provide a reference signal transmission method and device, which can solve the problem of insufficient DMRS transmission resources, thereby improving the reliability of DMRS transmission.

In order to achieve the above objectives, this application adopts the following technical solutions:

In the first aspect, a method for transmitting a reference signal is provided. The method includes: the network device sends a demodulation reference signal to the terminal device on the first symbol. Among them, the first symbol is determined by the symbols occupied by the synchronization signal block, system message, and data channel.

In the reference signal transmission method provided by the embodiments of the present application, the network device can determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel, and send the DMRS to the terminal device on the first symbol, which can solve the problem of Among the symbols occupied by the channel, the symbols originally occupied by the DMRS have been occupied by the synchronization signal block and the system message, resulting in the problem that the DMRS cannot be transmitted, and the reliability of the transmission of the DMRS can be improved.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design method, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design method, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

In the second aspect, a method for transmitting a reference signal is provided. The method includes: the terminal device receives the synchronization signal block and parses the system message to determine the first symbol. The terminal device receives the demodulation reference signal from the network device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design method, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design method, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

The technical effect of the reference signal transmission method described in the second aspect may refer to the technical effect of the reference signal transmission method described in the first aspect, which will not be repeated here.

In a third aspect, a method for transmitting a reference signal is provided. The method includes: the network device sends a demodulation reference signal to the terminal device on the first symbol. Among them, the first symbol is a part of the symbols occupied by the synchronization signal block, and the synchronization signal block and the data channel occupy the same symbol.

In the reference signal transmission method provided in the embodiments of the present application, the network device can determine the part of the symbols occupied by the synchronization signal block as the first symbol when the data channel and the synchronization signal block occupy the same symbol, and use it on the first symbol Frequency division multiplexing is used to send demodulation reference signals and synchronization signal blocks, which can solve the problem that the symbols occupied by the data channel are all occupied by the synchronization signal blocks, resulting in no complete symbols that can be used to transmit DMRS, and thus the problem that DMRS cannot be transmitted. It can improve the reliability of DMRS transmission.

In a possible design method, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design method, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design method, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

In a fourth aspect, a method for transmitting a reference signal is provided. The method includes: the terminal device receives the synchronization signal block and parses the system message to determine the first symbol. The terminal device receives the demodulation reference signal from the network device on the first symbol. Among them, the first symbol is a part of the symbols occupied by the synchronization signal block, and the synchronization signal block and the data channel occupy the same symbol.

In a possible design method, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design method, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design method, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

The technical effect of the reference signal transmission method described in the fourth aspect may refer to the technical effect of the reference signal transmission method described in the second aspect, which will not be repeated here.

In a fifth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the processing module is used to determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel. The transceiver module is used to send a demodulation reference signal to the terminal device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device of the fifth aspect may further include a storage module that stores programs or instructions. When the processing module executes the program or instruction, the communication device described in the fifth aspect can perform the function of the network device described in the first aspect.

It should be noted that the communication device described in the fifth aspect may be a network device, or a chip or a chip system provided in the network device, which is not limited in this application.

For the technical effect of the communication device described in the fifth aspect, reference may be made to the technical effect of the reference signal transmission method described in the first aspect, which will not be repeated here.

In a sixth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the transceiver module is used to receive synchronization signal blocks and system messages. The processing module is used to determine the first symbol according to the synchronization signal block and the system message. The transceiver module is also used to receive the demodulation reference signal from the network device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device of the sixth aspect may further include a storage module, and the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device described in the sixth aspect can execute the function of the terminal device described in the second aspect.

It should be noted that the communication device described in the sixth aspect may be a terminal device, or a chip or chip system provided in the terminal device, which is not limited in this application.

For the technical effect of the communication device described in the sixth aspect, reference may be made to the technical effect of the reference signal transmission method described in the first aspect, which will not be repeated here.

In a seventh aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. The processing module is used to determine part of the symbols in the symbols occupied by the synchronization signal block as the first symbol. Among them, the synchronization signal block and the data channel occupy the same symbol. The transceiver module is used to send a demodulation reference signal to the terminal device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device of the seventh aspect may further include a storage module that stores programs or instructions. When the processing module executes the program or instruction, the communication device described in the seventh aspect can perform the function of the network device described in the third aspect.

It should be noted that the communication device described in the seventh aspect may be a network device, or a chip or a chip system provided in the network device, which is not limited in this application.

For the technical effect of the communication device described in the seventh aspect, reference may be made to the technical effect of the reference signal transmission method described in the third aspect, which will not be repeated here.

In an eighth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the transceiver module is used to receive synchronization signal blocks and system messages. The processing module is used to determine the first symbol according to the synchronization signal block and the system message. Among them, the first symbol is a part of the symbols occupied by the synchronization signal block, and the synchronization signal block and the data channel occupy the same symbol. The transceiver module is also used to receive the demodulation reference signal from the network device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device of the eighth aspect may further include a storage module, and the storage module stores a program or instruction. When the processing module executes the program or instruction, the communication device described in the eighth aspect can execute the function of the terminal device described in the fourth aspect.

It should be noted that the communication device described in the eighth aspect may be a terminal device, or a chip or a chip system provided in the terminal device, which is not limited in this application.

For the technical effect of the communication device described in the eighth aspect, reference may be made to the technical effect of the reference signal transmission method described in the third aspect, which will not be repeated here.

In a ninth aspect, a communication device is provided. The communication device includes a processor and a transceiver. The processor is configured to determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel. The transceiver is used to send a demodulation reference signal to the terminal device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device described in the ninth aspect may further include a memory that stores programs or instructions. When the processor executes the program or instruction, the communication device described in the ninth aspect can perform the function of the network device described in the first aspect.

It should be noted that the communication device described in the ninth aspect may be a network device, or a chip or a chip system set in the network device, which is not limited in this application.

For the technical effect of the communication device described in the ninth aspect, reference may be made to the technical effect of the reference signal transmission method described in the first aspect, which will not be repeated here.

In a tenth aspect, a communication device is provided. The communication device includes a processor and a transceiver. Among them, the transceiver is used to receive synchronization signal blocks and system messages. The processor is configured to determine the first symbol according to the synchronization signal block and the system message. The transceiver is also used to receive the demodulation reference signal from the network device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device of the tenth aspect may further include a memory, and the memory stores programs or instructions. When the processor executes the program or instruction, the communication device described in the tenth aspect can execute the function of the terminal device described in the second aspect.

It should be noted that the communication device described in the tenth aspect may be a terminal device, or a chip or a chip system provided in the terminal device, which is not limited in this application.

For the technical effect of the communication device described in the tenth aspect, reference may be made to the technical effect of the reference signal transmission method described in the first aspect, which will not be repeated here.

In an eleventh aspect, a communication device is provided. The communication device includes a processor and a transceiver. The processor is configured to determine part of the symbols in the symbols occupied by the synchronization signal block as the first symbol. Among them, the synchronization signal block and the data channel occupy the same symbol. The transceiver is used to send a demodulation reference signal to the terminal device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device of the eleventh aspect may further include a memory, and the memory stores programs or instructions. When the processor executes the program or instruction, the communication device described in the eleventh aspect can perform the function of the network device described in the third aspect.

It should be noted that the communication device described in the eleventh aspect may be a network device, or a chip or a chip system provided in the network device, which is not limited in this application.

For the technical effect of the communication device described in the eleventh aspect, reference may be made to the technical effect of the reference signal transmission method described in the third aspect, which will not be repeated here.

In a twelfth aspect, a communication device is provided. The communication device includes a processor and a transceiver. Among them, the transceiver is used to receive synchronization signal blocks and system messages. The processor is configured to determine the first symbol according to the synchronization signal block and the system message. Among them, the first symbol is a part of the symbols occupied by the synchronization signal block, and the synchronization signal block and the data channel occupy the same symbol. The transceiver is also used to receive the demodulation reference signal from the network device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device of the twelfth aspect may further include a memory, and the memory stores programs or instructions. When the processor executes the program or instruction, the communication device described in the twelfth aspect can execute the function of the terminal device described in the fourth aspect.

It should be noted that the communication device described in the twelfth aspect may be a terminal device, or a chip or a chip system set in the terminal device, which is not limited in this application.

For the technical effect of the communication device described in the twelfth aspect, reference may be made to the technical effect of the reference signal transmission method described in the third aspect, which will not be repeated here.

In a thirteenth aspect, a chip system is provided. The chip system includes a processor and an input/output port. The processor is configured to implement the processing functions involved in the first to fourth aspects. The input/output port is To realize the transceiver functions involved in the first to fourth aspects.

In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data that implement the functions involved in the first to fourth aspects.

The chip system can be composed of chips, or include chips and other discrete devices.

In a fourteenth aspect, a communication system is provided. The system includes network equipment and terminal equipment.

In a fifteenth aspect, a computer-readable storage medium is provided, including: computer instructions are stored in the computer-readable storage medium; when the computer instructions are executed on a computer, the computer is caused to perform the operations as in the first to fourth aspects. The reference signal transmission method described in any one of the possible implementation manners.

In a sixteenth aspect, a computer program product containing instructions is provided, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer can execute any one of the first to fourth aspects Possible implementation of the reference signal transmission method.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the application;

FIG. 2 is a first structural diagram of a communication device provided by an embodiment of this application;

FIG. 3 is a first schematic flowchart of a reference signal transmission method provided by an embodiment of this application;

FIG. 4 is a schematic diagram of a transmission scenario 1 of a reference signal provided by an embodiment of the application;

FIG. 5 is a first example of a DMRS configuration in a transmission scenario of a reference signal provided by an embodiment of the application;

FIG. 6 is a second example of a DMRS configuration in a transmission scenario of a reference signal provided by an embodiment of the application;

FIG. 7 is a third example of a DMRS configuration in a transmission scenario of a reference signal provided by an embodiment of the application;

FIG. 8 is a schematic diagram of a second transmission scenario of a reference signal according to an embodiment of the application;

FIG. 9 is an example of a DMRS configuration in a second scenario of reference signal transmission provided by an embodiment of the application;

FIG. 10 is a schematic diagram of transmission scenario 3 of a reference signal provided by an embodiment of this application;

FIG. 11 is an example 1 of DMRS configuration in the third scenario of transmission of reference signals provided by an embodiment of the application;

FIG. 12 is a second example of a DMRS configuration in the third scenario of transmission of a reference signal provided by an embodiment of the application;

FIG. 13 is a third example of DMRS configuration in the third scenario of transmission of the reference signal provided by the embodiment of the application;

FIG. 14 is a schematic diagram of a fourth transmission scenario of a reference signal provided by an embodiment of the application;

FIG. 15 is an example of a DMRS configuration in a fourth scenario of reference signal transmission provided by an embodiment of the application;

16 is a schematic diagram of transmission scenario 5 of a reference signal provided by an embodiment of the application;

FIG. 17 is an example 1 of a DMRS configuration in a transmission scenario 5 of a reference signal provided by an embodiment of the application;

FIG. 18 is an example 2 of a DMRS configuration in a transmission scenario 5 of a reference signal provided by an embodiment of this application;

FIG. 19 is a third example of a DMRS configuration in a fifth scenario of reference signal transmission provided by an embodiment of the application;

FIG. 20 is an example 4 of a DMRS configuration in a transmission scenario 5 of a reference signal provided by an embodiment of the application;

FIG. 21 is an example 5 of DMRS configuration under scenario 5 of reference signal transmission provided by an embodiment of this application;

FIG. 22 is a schematic diagram of a sixth reference signal transmission scenario provided by an embodiment of the application;

FIG. 23 is an example 1 of a DMRS configuration in a sixth scenario of reference signal transmission provided by an embodiment of the application;

FIG. 24 is a second example of a DMRS configuration in a sixth scenario of reference signal transmission provided by an embodiment of the application;

FIG. 25 is a schematic diagram of a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 26 is an example 1 of a DMRS configuration in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 27 is an example 2 of a DMRS configuration in a reference signal transmission scenario 7 provided by an embodiment of the application;

FIG. 28 is a third example of a DMRS configuration in a transmission scenario 7 of a reference signal provided by an embodiment of the application;

FIG. 29 is an example 4 of a DMRS configuration in a transmission scenario 7 of a reference signal provided by an embodiment of this application;

FIG. 30 is an example 5 of a DMRS configuration in a transmission scenario 7 of a reference signal provided by an embodiment of this application;

FIG. 31 is an example 6 of a DMRS configuration in a transmission scenario 7 of a reference signal provided by an embodiment of this application;

FIG. 32 is a DMRS configuration example 7 in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 33 is a DMRS configuration example eight in a reference signal transmission scenario seven provided by an embodiment of this application;

FIG. 34 is a DMRS configuration example 9 in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 35 is a DMRS configuration example 10 in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 36 is a DMRS configuration example 11 in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 37 is a twelfth example of a DMRS configuration in a reference signal transmission scenario 7 provided by an embodiment of this application;

FIG. 38 is a schematic diagram of a reference signal transmission scenario 8 provided by an embodiment of this application;

FIG. 39 is an example 1 of a DMRS configuration in a reference signal transmission scenario 8 provided by an embodiment of this application;

FIG. 40 is a second example of a DMRS configuration in a reference signal transmission scenario 8 provided by an embodiment of this application;

FIG. 41 is a third example of a DMRS configuration in a reference signal transmission scenario 8 provided by an embodiment of this application;

FIG. 42 is a second schematic flowchart of a reference signal transmission method provided by an embodiment of this application;

FIG. 43 is a schematic diagram of a reference signal transmission scenario 9 provided by an embodiment of the application;

FIG. 44 is an example 1 of DMRS configuration in the 9th scenario of reference signal transmission provided by an embodiment of this application;

FIG. 45 is a second example of a DMRS configuration in a transmission scenario 9 of a reference signal provided by an embodiment of the application;

FIG. 46 is a third example of a DMRS configuration in a transmission scenario 9 of a reference signal provided by an embodiment of this application;

FIG. 47 is a fourth example of a DMRS configuration in a transmission scenario 9 of a reference signal provided by an embodiment of this application;

FIG. 48 is an example 5 of a DMRS configuration in a transmission scenario 9 of a reference signal provided by an embodiment of this application;

FIG. 49 is a DMRS configuration example 6 in a transmission scenario 9 of a reference signal provided by an embodiment of this application;

FIG. 50 is a DMRS configuration example 7 in a transmission scenario 9 of a reference signal provided by an embodiment of this application;

FIG. 51 is a schematic diagram of transmission scenario 10 of a reference signal provided by an embodiment of the application;

FIG. 52 is an example 1 of a DMRS configuration in a transmission scenario 10 of a reference signal provided by an embodiment of this application;

FIG. 53 is an example 2 of a DMRS configuration in a transmission scenario 10 of a reference signal provided by an embodiment of this application;

FIG. 54 is the third example of DMRS configuration in the tenth scenario of the reference signal transmission provided by the embodiment of the application;

FIG. 55 is an example 4 of a DMRS configuration in a transmission scenario 10 of a reference signal provided by an embodiment of the application;

FIG. 56 is an example 5 of a DMRS configuration in a transmission scenario 10 of a reference signal provided by an embodiment of this application;

FIG. 57 is a sixth example of a DMRS configuration in a transmission scenario 10 of a reference signal provided by an embodiment of this application;

FIG. 58 is a DMRS configuration example 7 in a transmission scenario 10 of a reference signal provided by an embodiment of this application;

FIG. 59 is a schematic diagram of a reference signal transmission scenario 11 provided by an embodiment of this application;

FIG. 60 is a first example of a DMRS configuration in scenario 11 of the reference signal transmission provided by an embodiment of this application;

FIG. 61 is a second example of a DMRS configuration in scenario 11 of the reference signal transmission provided by an embodiment of this application;

FIG. 62 is a third example of a DMRS configuration in scenario 11 of the reference signal transmission provided by an embodiment of the application;

FIG. 63 is a fourth example of a DMRS configuration in the eleventh scenario of the reference signal transmission provided by the embodiment of this application;

FIG. 64 is a DMRS configuration example 5 in scenario 11 of the reference signal transmission provided by an embodiment of this application;

FIG. 65 is a DMRS configuration example 6 in scenario 11 of the reference signal transmission provided by an embodiment of this application;

FIG. 66 is a DMRS configuration example 7 in the eleventh scenario of the reference signal transmission provided by the embodiment of this application;

FIG. 67 is a second structural diagram of a communication device provided by an embodiment of this application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various unlicensed (U) communication systems, such as NR-U systems, long term evolution-unlicensed (LTE-U) systems, and wireless fidelity unlicensed systems. (wireless fidelity-unlicensed, WiFi-U) system, vehicle to everything-unlicensed (V2X-U) system, etc., and future unlicensed systems, such as the 6th generation (6G) Authorization system, etc.

This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and understood that each system may include additional devices, components, modules, etc., and/or may not include all the devices, components, modules, etc. discussed in conjunction with the drawings. In addition, a combination of these schemes can also be used.

In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used as examples, illustrations, or illustrations. Any embodiment or design solution described as an "example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. Rather, the term example is used to present the concept in a concrete way.

In the embodiments of this application, "information", "signal", "message", "channel", and "singalling" can sometimes be used together. It should be noted that, When the difference is not emphasized, the meaning to be expressed is the same. "的 (of)", "corresponding (relevant)" and "corresponding (corresponding)" can sometimes be used interchangeably. It should be pointed out that the meanings to be expressed are the same when the difference is not emphasized.

Embodiment of the present application, the subscript sometimes as W ₁ may form a clerical error at non-target as W1, while not emphasize the difference, to express their meaning is the same.

The network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

Some scenarios in the embodiments of the present application are described by taking the scenario in the communication system shown in FIG. 1 as an example. It should be noted that the solutions in the embodiments of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with names of corresponding functions in other mobile communication systems.

To facilitate the understanding of the embodiments of the present application, first, the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. Fig. 1 shows a schematic diagram of a communication system suitable for the reference signal transmission method of the embodiment of the present application. FIG. 1 is a schematic structural diagram of a communication system to which the reference signal transmission method provided in an embodiment of the application is applicable. As shown in Figure 1, the communication system includes network equipment and terminal equipment. Wherein, the network device is used to send a demodulation reference signal to the terminal device on the first symbol. Among them, the first symbol is determined by the symbols occupied by the synchronization signal block, system message, and data channel. The terminal device is used to receive the synchronization signal block and parse the system message to determine the first symbol, and on the first symbol, receive the demodulation reference signal from the network device.

Wherein, the above-mentioned network device is a device that is located on the network side of the above-mentioned communication system and has a wireless transceiver function, or a chip or chip system that can be installed in the device. The network equipment includes, but is not limited to: access points (AP) in wireless fidelity (WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., evolved node B (evolved) Node B, eNB), radio network controller (RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (BTS), home Base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP) Etc., it can also be 5G, such as gNB in the new radio (NR) system, or transmission point (TRP or TP), one or a group (including multiple antenna panels) antennas of the base station in the 5G system The panel, or, can also be a network node that forms a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (DU), a roadside unit (RSU) with base station functions, etc. .

The above-mentioned terminal equipment is a terminal that is connected to the above-mentioned communication system and has a wireless transceiver function, or a chip or chip system that can be installed in the terminal. The terminal device may also be referred to as a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and transportation safety Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, in-vehicle terminals, RSUs with terminal functions, etc. The terminal device of the present application may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units. The vehicle passes through the built-in on-board module, on-board module, The vehicle-mounted component, the vehicle-mounted chip, or the vehicle-mounted unit may implement the reference signal transmission method provided in this application.

It should be noted that the reference signal transmission method provided in the embodiment of the present application can be used between any two nodes shown in FIG. 1, such as between terminal equipment, between network equipment, and between terminal equipment and network equipment. between. For the communication between terminal devices, if there is a network device, it is a scenario with network coverage; if there is no network device, it is a scenario without network coverage. In a scenario with network coverage, communication between terminal devices can be performed using resources configured by the network device, and in a scenario without network coverage, communication between terminal devices can be performed using pre-configured resources.

It should be understood that FIG. 1 is only a simplified schematic diagram of an example for ease of understanding, and the communication system may also include other network devices, and/or other terminal devices, which are not shown in FIG. 1.

FIG. 2 is a schematic structural diagram of a communication device 200 that can be used to implement the reference signal transmission method provided in an embodiment of the present application. The communication apparatus 200 may be a network device or a terminal device, and may also be a chip applied to the network device or terminal device, or other components with network device functions or terminal device functions. As shown in FIG. 2, the communication device 200 may include a processor 201, a memory 202, and a transceiver 203. The processor 201 is coupled with the memory 202 and the transceiver 203, for example, can be connected through a communication bus.

The components of the communication device 200 will be specifically introduced below with reference to FIG. 2:

The processor 201 is the control center of the communication device 200, and may be a processor or a collective name for multiple processing elements. For example, the processor 201 is one or more central processing units (CPU), or may be an application specific integrated circuit (ASIC), or may be configured to implement one or more of the embodiments of the present application. An integrated circuit, for example: one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (FPGA).

The processor 201 can execute various functions of the communication device 200 by running or executing a software program stored in the memory 202 and calling data stored in the memory 202.

Exemplarily, the communication apparatus 200 may be a network device, and referring to FIG. 3 and FIG. 42 described below, the processor 201 may be used to execute S301 and S4201.

Exemplarily, the communication apparatus 200 may be a terminal device. Referring to FIG. 3 and FIG. 42 described below, the processor 201 may be configured to analyze the received synchronization signal block and system message, and determine the first symbol.

It should be noted that the processor 201 can also execute the processing functions of the network devices or the processing functions of the terminal devices involved in the various implementations of the following method embodiments. For details, please refer to the relevant descriptions of the following method embodiments. I won't repeat them here.

In a specific implementation, as an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 2.

In specific implementation, as an embodiment, the communication device 200 may also include multiple processors, such as the processor 201 and the processor 204 shown in FIG. 2. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

The memory 202 can be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or other types that can store information and instructions. The type of dynamic storage communication equipment can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital universal disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired program codes in the form of instructions or data structures and Any other medium that can be accessed by the computer, but not limited to this. The memory 202 may exist independently, or may be integrated with the processor 201.

Wherein, the memory 202 is used to store a software program for executing the solution of the present application, and the processor 201 controls the execution.

The transceiver 203 is used for communication with other communication devices. For example, the communication apparatus 200 is a terminal device, and the transceiver 203 may be used to communicate with a network device or to communicate with another terminal device. For another example, the communication apparatus 200 is a network device, and the transceiver 203 may be used to communicate with a terminal device or to communicate with another network device. It should be understood that the transceiver 203 may include a receiver and a transmitter, where the receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

Exemplarily, the communication apparatus 200 may be a network device, and referring to FIG. 3 and FIG. 42 described below, the transceiver 203 may be used to perform S302 and S303, or S4202 and S4203.

Exemplarily, the communication device 200 may be a terminal device. With reference to Figures 3 and 42, the transceiver 203 can be used to perform S304 and S305, or receive synchronization signal blocks and system messages in S4204 and S4205, and determine Receive demodulation reference signal and other functions on the first symbol.

It should be noted that the transceiver 203 can also perform the sending function of the network device or the receiving function of the terminal device involved in the various implementations of the following method embodiments. For details, please refer to the relevant description of the following method embodiments. I won't repeat them here.

It should be noted that the structure of the communication device 200 shown in FIG. 2 does not constitute a limitation on the communication device. The actual communication device may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.

The transmission method of the reference signal provided by the embodiment of the present application will be specifically described below in conjunction with FIG. 3 to FIG. 66.

FIG. 3 is a first schematic flowchart of a reference signal transmission method provided by an embodiment of this application. The transmission method of the reference signal can be applied to the communication between the network device and the terminal device shown in FIG. 1.

As shown in Figure 3, the reference signal transmission method includes the following steps:

S301: The network device determines the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel.

That is, the first symbol is jointly determined by the symbols occupied by each of the synchronization signal block, system message, and data channel, and the synchronization signal block, system message, and data channel have a one-to-one correspondence.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design method, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design method, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

In the following, taking the data channel as the PDSCH and the system message as the CORESET as an example, and combining several scenarios, it is described in detail how to determine the first symbol, that is, the symbol occupied by the DMRS.

Exemplarily, FIG. 4 is a schematic diagram of scenario 1 of the reference signal transmission method provided by an embodiment of the application. As shown in Figure 4, SSB and its corresponding PDSCH occupies the first half of the time slot, and SSB occupies symbol 2-symbol 5, and CORESET occupies 1 symbol, that is symbol 0. In a possible implementation manner, the start symbol (start symbol, S) of the PDSCH is symbol 0, that is, S=0, and the symbol length (length of symbols, L) is 7 symbols, that is, L=7. That is to say, when L=7, PDSCH and CORESET adopt frequency division multiplexing (FMD) to jointly occupy symbol 0. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 1, that is, S=1, and the symbol length is 6 symbols, that is, L=6. In other words, when L=6, PDSCH does not occupy symbol 0, and CORESET occupies symbol 0. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scene one shown in Figure 4, the symbols not occupied by SSB and CORESET include symbol 1 and symbol 6. If DMRS only needs to occupy 1 symbol, as shown in Figure 5 and Figure 6, DMRS can occupy symbol 1 or symbol 6, that is, the symbols occupied by DMRS can be selected from the symbols occupied by PDSCH and not occupied by SSB and CORESET. choose one. It is easy to understand that if the DMRS needs to occupy 2 symbols, as shown in Fig. 7, the DMRS needs to occupy symbol 1 and symbol 6.

Exemplarily, FIG. 8 is a schematic diagram of Scene 2 of the reference signal transmission method provided in an embodiment of the application. As shown in Figure 8, SSB and its corresponding PDSCH occupy the first half of the time slot, and SSB occupies symbol 2-symbol 5, and CORESET occupies 2 symbols, namely symbol 0 and symbol 1. In a possible implementation manner, the start symbol (start symbol, S) of the PDSCH is symbol 0, that is, S=0, and the symbol length (length of symbols, L) is 7 symbols, that is, L=7. That is to say, when L=7, PDSCH and CORESET adopt frequency division multiplexing (FMD) to jointly occupy symbol 0. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 1, that is, S=1, and the symbol length is 6 symbols, that is, L=6. That is to say, when L=6, PDSCH does not occupy symbol 0, CORESET occupies symbol 0, and PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 1. The embodiment of this application does not specifically limit whether PDSCH and CORESET occupy the same symbol.

For the second scenario shown in Figure 8, the symbols that are not occupied by SSB and CORESET are only symbol 6, that is, scenario two is only applicable to the situation where DMRS only needs to occupy 1 symbol. As shown in Figure 9, DMRS can only occupy symbol 6 .

Exemplarily, FIG. 10 is a schematic diagram of Scene 3 of the reference signal transmission method provided by an embodiment of the application. As shown in Figure 10, SSB and its corresponding PDSCH occupy the second half of the time slot, and SSB occupies symbol 9-symbol 12, and CORESET occupies 1 symbol, that is symbol 7. In a possible implementation manner, the start symbol (start symbol, S) of the PDSCH is symbol 7, that is, S=7, and the symbol length (length of symbols, L) is 7 symbols, that is, L=7. That is to say, when L=7, the PDSCH and CORESET share symbol 7 in a frequency division multiplexing (FMD) manner. Or, in another possible implementation manner, the starting symbol of the PDSCH is symbol 8, that is, S=8, and the symbol length is 6 symbols, that is, L=6. In other words, when L=6, PDSCH does not occupy symbol 7 and CORESET occupies symbol 7. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scene 3 shown in Figure 10, the symbols not occupied by SSB and CORESET include symbol 8 and symbol 13. If DMRS only needs to occupy 1 symbol, as shown in Figure 11 and Figure 12, DMRS can occupy symbol 8 or symbol 13, that is, the symbol occupied by DMRS can be from the symbols occupied by PDSCH not occupied by SSB and CORESET. choose one. It is easy to understand that if the DMRS needs to occupy 2 symbols, as shown in Figure 13, the DMRS needs to occupy symbol 8 and symbol 13.

Exemplarily, FIG. 14 is a schematic diagram of Scene 4 of the reference signal transmission method provided in an embodiment of this application. As shown in Figure 14, SSB and its corresponding PDSCH occupy the second half of the time slot, and SSB occupies symbol 9-symbol 12, and CORESET occupies 2 symbols, namely symbol 7 and symbol 8. In a possible implementation, the starting symbol of the PDSCH is symbol 7, that is, S=7, and the symbol length is 7 symbols, that is, L=7. That is to say, when L=7, PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 7 and symbol 8. Or, in another possible implementation manner, the starting symbol of the PDSCH is symbol 8, that is, S=8, and the symbol length is 6 symbols, that is, L=6. That is to say, when L=6, PDSCH does not occupy symbol 7, CORESET occupies symbol 7, and PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 8. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scenario 4 shown in Figure 14, the symbols not occupied by SSB and CORESET are only symbol 13. That is, scenario 4 is only applicable to the situation where DMRS only needs to occupy 1 symbol. As shown in Figure 15, DMRS can only occupy symbol 13 .

Table 1 is the symbol configuration table occupied by various DMRSs involved in the above scenario 1 to scenario 4. Exemplarily, for scenario 1 shown in FIG. 4, the DMRS configuration shown in FIG. 5 may be any one of the DMRS configurations corresponding to index 2 to index 3 in Table 1, and the DMRS configuration shown in FIG. 6 may be Table 1. Any one of the DMRS configurations corresponding to index 11 to index 12, the DMRS configuration shown in FIG. 7 may be any one of the DMRS configurations corresponding to index 4 to index 5 in Table 1.

Exemplarily, for the second scenario shown in FIG. 8, the DMRS configuration shown in FIG. 9 may be any one of the DMRS configurations corresponding to index 11 to index 12 in Table 1.

Exemplarily, for scenario 3 shown in FIG. 10, the DMRS configuration shown in FIG. 11 may be any one of the DMRS configurations corresponding to index 6 to index 7 in Table 1, and the DMRS configuration shown in FIG. 12 may be Table 1. Any one of the DMRS configurations corresponding to index 14 to index 15 in the middle. The DMRS configuration shown in FIG. 13 may be any one of the DMRS configurations corresponding to index 8 to index 9 in Table 1.

Exemplarily, for the fourth scenario shown in FIG. 14, the DMRS configuration shown in FIG. 15 may be any one of the DMRS configurations corresponding to index 14 to index 15 in Table 1.

It should be noted that, for the above scenario 1 to scenario 4, the SSB and its corresponding PDSCH occupy the first half slot or the second half slot, or part of the symbols in the occupied first half slot or the second half slot. For example, as shown in Table 1, for index 0, SSB and its corresponding PDSCH occupy a total of 5 symbols from symbol 1 to symbol 5, and symbol 0 is not occupied. For another example, as shown in Table 1, for index 10, SSB and its corresponding PDSCH occupy a total of 5 symbols from symbol 2 to symbol 6, and symbol 0 and symbol 1 are not occupied. For another example, as shown in Table 1, for index 13, SSB and its corresponding PDSCH occupy a total of 5 symbols from symbol 9 to symbol 13, and symbol 7 and symbol 8 are not occupied. It is easy to understand that the symbols not occupied by the SSB and its corresponding PDSCH can be occupied by CORESET, that is, in this case, the PDSCH and CORESET can be time-division multiplexed to occupy different symbols.

Table 1

index PDSCH mapping type S L Symbols occupied by DMRS Slot length 0 Type B 1 5 1 6 1 Type B 0 6 1 7 2 Type B 1 6 1 7 3 Type B 0 7 1 7 4 Type B 1 6 {1,6} 7 5 Type B 0 7 {1,6} 7 6 Type B 8 6 8 7 7 Type B 7 7 8 7 8 Type B 8 6 {8,13} 7 9 Type B 7 7 {8,13} 7 10 Type B 2 5 6 7 11 Type B 1 6 6 7 12 Type B 0 7 6 7 13 Type B 9 5 13 7 14 Type B 8 6 13 7 15 Type B 7 7 13 7

Exemplarily, FIG. 16 is a schematic diagram of Scene 5 of the reference signal transmission method provided by an embodiment of the application. As shown in Figure 16, SSB and its corresponding PDSCH occupy the last 7 or 8 symbols in a time slot, that is, symbol 7-symbol 13, or symbol 6-symbol 13, and SSB occupies symbol 8-symbol 11. CORESET occupies 1 symbol, which is symbol 6. In a possible implementation, the starting symbol of the PDSCH is symbol 6, that is, S=6, and the symbol length is 8 symbols, that is, L=8. In other words, when L=8, PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 6. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 7, that is, S=7, and the symbol length is 7 symbols, that is, L=7. In other words, when L=7, PDSCH does not occupy symbol 6, and CORESET occupies symbol 6. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scene 5 shown in Figure 16, the symbols not occupied by SSB and CORESET include symbol 7, symbol 12, and symbol 13. If DMRS only needs to occupy 1 symbol, as shown in Figure 17-19, DMRS can occupy symbol 7 or symbol 12 or symbol 13, that is, the symbol occupied by DMRS can be from the symbols occupied by PDSCH not occupied by SSB and CORESET Choose one of the symbols. It is easy to understand that if DMRS needs to occupy 2 symbols, as shown in Figure 20-21, DMRS can occupy symbol 7 and symbol 12, or occupy symbol 7 and symbol 13, that is, for the 2 symbols occupied by DMRS, one is located in SSB Before the occupied symbol, one is after the symbol occupied by the SSB.

Exemplarily, FIG. 22 is a schematic diagram of scenario 6 of the reference signal transmission method provided in an embodiment of the application. As shown in Figure 22, SSB and its corresponding PDSCH occupy the last 7 or 8 symbols in a time slot, that is, symbol 7-symbol 13, or symbol 6-symbol 13, and SSB occupies symbol 8-symbol 11. CORESET occupies 2 symbols, namely symbol 6 and symbol 7. In a possible implementation, the starting symbol of the PDSCH is symbol 6, that is, S=6, and the symbol length is 8 symbols, that is, L=8. In other words, when L=8, PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 6. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 7, that is, S=7, and the symbol length is 7 symbols, that is, L=7. In other words, when L=7, PDSCH does not occupy symbol 6, and CORESET occupies symbol 6. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scenario 6 shown in Figure 22, the symbols not occupied by SSB and CORESET are only symbol 12 and symbol 13, and symbol 12 and symbol 13 are continuous, that is, scenario 6 is only applicable to the situation where DMRS only needs to occupy 1 symbol, as As shown in Figure 23 to Figure 24, DMRS can occupy symbol 12 or symbol 13.

Table 2 is a configuration table of symbols occupied by various DMRSs involved in the above scenario 5 to scenario 6. Exemplarily, for scenario 5 shown in FIG. 16, the DMRS configuration shown in FIG. 17 may be any one of the DMRS configurations corresponding to index 0 to index 1 in Table 2, and the DMRS configuration shown in FIG. 18 may be Table 2. Any one of the DMRS configurations corresponding to index 2 to index 3 in the middle. The DMRS configuration shown in FIG. 19 may be any one of the DMRS configurations corresponding to index 4 to index 5 in Table 2. Exemplarily, for scenario 5 shown in FIG. 16, the DMRS configuration shown in FIG. 20 may be any one of the DMRS configurations corresponding to index 6 to index 7 in Table 2, and the DMRS configuration shown in FIG. 21 may be a table Any one of the DMRS configurations corresponding to index 8 to index 9 in 2.

Exemplarily, for scenario 6 shown in FIG. 22, the DMRS configuration shown in FIG. 23 may be any one of the DMRS configurations corresponding to index 2 to index 3 in Table 2, and the DMRS configuration shown in FIG. 24 may be Table 2. Any one of the DMRS configurations corresponding to index 4 to index 5.

Table 2

index PDSCH mapping type S L Symbols occupied by DMRS Slot length 0 Type B 7 7 7 8 1 Type B 6 8 7 8 2 Type B 7 7 12 8 3 Type B 6 8 12 8 4 Type B 7 7 13 8 5 Type B 6 8 13 8 6 Type B 7 7 {7,12} 8 7 Type B 6 8 {7,12} 8 8 Type B 7 7 {7,13} 8 9 Type B 6 8 {7,13} 8

Exemplarily, FIG. 25 is a schematic diagram of Scene 7 of the reference signal transmission method provided by an embodiment of the application. As shown in Figure 25, SSB and its corresponding PDSCH occupy the first 9 or 10 symbols in a time slot, namely symbol 1 to symbol 9, or symbol 0 to symbol 9, and SSB occupies symbol 2 to symbol 5. CORESET Occupies 1 symbol, which is symbol 0. In a possible implementation, the starting symbol of the PDSCH is symbol 0, that is, S=0, and the symbol length is 10 symbols, that is, L=10. That is to say, when L=10, PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 0. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 1, that is, S=1, and the symbol length is 9 symbols, that is, L=9. In other words, when L=9, PDSCH does not occupy symbol 0, and CORESET occupies symbol 0. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scene 7 shown in Figure 25, the symbols not occupied by SSB and CORESET include symbol 1, symbol 6 and symbol 9. If DMRS only needs to occupy 1 symbol, as shown in Figure 26-30, DMRS can occupy any one of symbol 1, symbol 6 and symbol 9, that is, the symbol occupied by DMRS can be from the symbols occupied by PDSCH and not SSB Either one of the symbols occupied by CORESET. It is easy to understand that if DMRS needs to occupy 2 symbols, as shown in Figure 31-Figure 34, DMRS can occupy symbol 1 and symbol 6, or occupy symbol 1 and symbol 7, or occupy symbol 1 and symbol 8, or occupy symbol 1. And symbol 9, that is, for the 2 symbols occupied by DMRS, one is located before the symbol occupied by the SSB, and the other is located after the symbol occupied by the SSB. Or, optionally, if the DMRS needs to occupy 2 symbols, as shown in Figure 35-Figure 37, the DMRS can occupy symbol 6 and symbol 8, or occupy symbol 6 and symbol 9, or occupy symbol 7 and symbol 9, namely The two symbols occupied by the DMRS may all be located after the symbol occupied by the SSB, and the two symbols are not continuous.

Exemplarily, FIG. 38 is a schematic diagram of Scene 8 of the method for transmitting a reference signal according to an embodiment of the application. As shown in Figure 38, SSB and its corresponding PDSCH occupy the first 9 or 10 symbols in a time slot, namely symbol 1 to symbol 9, or symbol 0 to symbol 9, and SSB occupies symbol 2 to symbol 5. CORESET Occupies 2 symbols, namely symbol 0 and symbol 1. In a possible implementation, the starting symbol of the PDSCH is symbol 0, that is, S=0, and the symbol length is 10 symbols, that is, L=10. In other words, when L=10, PDSCH and CORESET use frequency division multiplexing to jointly occupy symbol 0 and symbol 1. Or, in another possible implementation manner, the start symbol of the PDSCH is symbol 1, that is, S=1, and the symbol length is 9 symbols, that is, L=9. That is, when L=9, PDSCH does not occupy symbol 0, CORESET occupies symbol 0, and PDSCH and CORESET occupy symbol 1 together. The embodiment of the present application does not specifically limit whether the PDSCH and CORESET occupy the same symbol.

For scene 8 shown in Figure 38, the symbols not occupied by SSB and CORESET include symbol 6 and symbol 9. As shown in Figure 39-Figure 41, DMRS can occupy symbol 6 and symbol 8, or occupy symbol 6 and symbol 9. , Or occupying symbol 7 and symbol 9, that is, the two symbols occupied by the DMRS are located after the symbol occupied by the SSB, and the two symbols are not continuous.

Table 3 is the symbol configuration table occupied by various DMRSs involved in the above-mentioned scenario 7 to scenario 8. Exemplarily, for scenario 7 shown in FIG. 25, the DMRS configuration shown in FIGS. 26-30 may be the DMRS configuration corresponding to index 2 or index 5 in Table 3. The DMRS shown in FIGS. 31-34 and 36 The configuration can be the DMRS configuration corresponding to index 15 or index 18 in Table 3.

Exemplarily, for scenario 8 shown in Figure 38, given that CORESET has already occupied symbol 0 and symbol 1, the DMRS configuration shown in Figure 40 may be that the DMRS configuration corresponding to index 15 or index 18 in Table 3 does not include symbols. 1 configuration.

table 3

It should be noted that, given that the DMRS needs to occupy the symbols after the symbol occupied by CORESET, among the various configurations in Table 3, the configuration of the symbol 1 occupied by the DMRS is only applicable to scenario 7 and not applicable to scenario 8. In addition, the scenarios shown in FIG. 25 and FIG. 38 are only described by taking a time slot with a symbol length of 10 as an example. Table 3 also includes time slots with other symbol lengths, which will not be repeated here.

In the embodiment of this application, when there are two first symbols, in order to improve the accuracy of PDSCH channel estimation as much as possible, the symbols occupied by PDSCH can be selected firstly from symbols not occupied by SSB and CORESET, and the symbols deviate from each other. The larger two symbols are used as the first symbol. For example, one first symbol is located before the symbol occupied by the SSB, and another first symbol is located after the symbol occupied by the SSB. For another example, the two first symbols are the first symbol and the last symbol of the PDSCH symbols located after the symbols occupied by the SSB. For another example, the two first symbols are the first symbol and the last symbol of the PDSCH symbols located before the symbols occupied by the SSB. In other words, for two symbols with a small symbol deviation from each other, they are usually not selected as the first symbol. For example, for the scene of index 15 or index 18 in Table 3, the two configurations {6,8} and {7,9} are also selectable, but due to the symbol between the two symbols in the two configurations The deviation is small, only 2 symbols, and the accuracy of the PDSCH channel estimation result is poor. Therefore, the symbols in the two configurations will not be determined as the first symbol, and of course it is not included in Table 3.

Similarly, when the first symbol is one, in order to improve the accuracy of PDSCH channel estimation as much as possible, the symbols that are not occupied by SSB and CORESET and are located in the middle of the symbols occupied by PDSCH can be selected from the symbols occupied by PDSCH first. , As the first symbol. For example, the last symbol before the symbol occupied by the SSB may be preferentially selected, or the first symbol after the symbol occupied by the SSB may be preferentially selected as the first symbol.

S302: The network device sends the synchronization signal block, system message, and data channel to the terminal device on the symbols respectively occupied by the synchronization signal block, system message, and data channel.

S303: The network device sends a demodulation reference signal to the terminal device on the first symbol.

Exemplarily, the network device may send SSB, CORESET, DMRS, and PDSCH to the terminal device on the symbols occupied by the SSB, CORESET, DMRS, and PDSCH determined in S301 on the downlink (DL). In other words, the transmission sequence of SSB, CORESET, DMRS, and PDSCH is transmitted in sequence according to the symbol sequence occupied by each.

S304: The terminal device receives the synchronization signal block and parses the system message to determine the first symbol.

Exemplarily, the terminal device can receive and parse the SSB, obtain the symbol occupied by the system message, and receive and parse the system message on the symbol occupied by the system message, thereby obtaining the position of the first symbol and the demodulation parameter of the data channel, such as Code modulation scheme (modulation&coding scheme, MCS). Among them, the position of the first symbol can refer to the above Table 1 to Table 3, which will not be repeated here.

S305: The terminal device receives the demodulation reference signal from the network device on the first symbol.

Exemplarily, after acquiring the position of the first symbol, the terminal device can receive the DMRS on the first symbol and perform channel estimation on the data channel. Then, the terminal device demodulates and decodes the data channel based on the channel estimation result and the demodulation parameter of the data channel, thereby obtaining user data.

In the reference signal transmission method provided by the embodiments of the present application, the network device can determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel, and send the DMRS to the terminal device on the first symbol, which can solve the problem of Among the symbols occupied by the channel, the symbols originally occupied by the DMRS have been occupied by the synchronization signal block and the system message, resulting in the problem that the DMRS cannot be transmitted, and the reliability of the transmission of the DMRS can be improved.

The reference signal transmission methods shown in Fig. 3 to Fig. 41 all use time division multiplexing to transmit the demodulation reference signal. In the embodiment of this application, when the symbols occupied by the data channel are all occupied by the SSB, frequency division multiplexing can also be used to transmit the demodulation reference signal, that is, the DMRS can be on the part of the symbols occupied by the SSB, and the unused SSB can be occupied. The occupied subcarriers are transmitted.

FIG. 42 is a second schematic flowchart of a method for transmitting a reference signal according to an embodiment of this application. The transmission method of the reference signal can be applied to the communication between the network device and the terminal device shown in FIG. 1. As shown in Fig. 42, the reference signal transmission method includes the following steps:

S4201: The network device determines part of the symbols occupied by the synchronization signal block as the first symbol.

Among them, the synchronization signal block and the data channel occupy the same symbol.

In a possible design method, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design method, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design method, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

In the following, taking the data channel as the PDSCH and the system message as the CORESET as an example, and combining several scenarios, it is described in detail how to determine the first symbol, that is, the symbol occupied by the DMRS.

Exemplarily, FIG. 43 is a schematic diagram of scene 9 of the reference signal transmission method provided by an embodiment of the application. As shown in Figure 43, SSB and its corresponding PDSCH jointly occupy symbol 2 to symbol 5, and CORESET occupies 2 symbols, namely symbol 0 and symbol 1. Among them, the starting symbol of the PDSCH is symbol 2, that is, S=2, and the symbol length is 4 symbols, that is, L=4.

For scenario 9 shown in Figure 43, if the DMRS only needs to occupy one symbol, as shown in Figure 44-Figure 47, the DMRS can occupy any one of symbol 2 to symbol 5. If the DMRS needs to occupy 2 symbols, as shown in Figure 48-50, the DMRS can occupy symbol 2 and symbol 4, or occupy symbol 2 and symbol 5, or occupy symbol 3 and symbol 5.

Exemplarily, FIG. 51 is a schematic diagram of Scene 10 of the reference signal transmission method provided by an embodiment of this application. As shown in Figure 51, SSB and its corresponding PDSCH jointly occupy symbol 8-symbol 11, and CORESET occupies 1 symbol, namely symbol 7. Among them, the starting symbol of the PDSCH is symbol 8, that is, S=8, and the symbol length is 4 symbols, that is, L=4.

For the scene ten shown in Figure 51, if the DMRS only needs to occupy 1 symbol, as shown in Figure 52 to Figure 55, the DMRS can occupy any one of the symbol 8 to the symbol 11. If DMRS needs to occupy 2 symbols, as shown in Figure 56-Figure 58, DMRS can occupy symbol 8 and symbol 10, or occupy symbol 8 and symbol 11, or occupy symbol 9 and symbol 11.

Exemplarily, FIG. 59 is a schematic diagram of Scene 11 of the reference signal transmission method provided by the embodiment of this application. As shown in Figure 59, SSB and its corresponding PDSCH jointly occupy symbol 9-symbol 12, and CORESET occupies 2 symbols, namely symbol 7 and symbol 8. Among them, the starting symbol of the PDSCH is symbol 9, that is, S=9, and the symbol length is 4 symbols, that is, L=4.

For scenario 11 shown in Fig. 59, if the DMRS only needs to occupy 1 symbol, as shown in Figs. 60-63, the DMRS can occupy any one of symbols 9 to 12. If DMRS needs to occupy 2 symbols, as shown in Figure 64-Figure 66, DMRS can occupy symbol 9 and symbol 11, or occupy symbol 9 and symbol 12, or occupy symbol 10 and symbol 12.

S4202: The network device sends the synchronization signal block, the system message, and the data channel to the terminal device on the symbols respectively occupied by the synchronization signal block, the system message, and the data channel. For specific implementation, refer to S302, which will not be repeated here.

S4203: The network device sends a demodulation reference signal to the terminal device on the first symbol.

It should be noted that in S303, since the first symbol is time-division multiplexed with the symbol occupied by CORESET and the symbol occupied by SSB, the demodulation reference signal, CORESET and SSB are sent on different symbols, that is, the demodulation reference signal, CORESET , SSB will not be sent at the same time. In S4203, the first symbol is part of the symbols occupied by the SSB, and the demodulation reference signal needs to be sent simultaneously on different subcarriers of the same symbol with part of the content in the SSB.

Exemplarily, it is assumed that the synchronization signal block and the data channel occupy symbol 2 to symbol 5, which are used to transmit the primary synchronization signal (PSS), the first physical broadcast channel (PBCH), and the secondary synchronization signal in turn. (secondary synchronization signal, SSS) and the second PBCH, the demodulation reference signal is sent together with the PSS on symbol 2 and the second PBCH is sent on symbol 5.

S4204: The terminal device receives the synchronization signal block and parses the system message to determine the first symbol.

S4205: The terminal device receives the demodulation reference signal from the network device on the first symbol.

For the implementation of S4204-S4205, refer to S304-S305, which will not be repeated here.

In the reference signal transmission method provided in the embodiments of the present application, the network device can determine the part of the symbols occupied by the synchronization signal block as the first symbol when the data channel and the synchronization signal block occupy the same symbol, and use it on the first symbol Frequency division multiplexing is used to send demodulation reference signals and synchronization signal blocks, which can solve the problem that the symbols occupied by the data channel are all occupied by the synchronization signal blocks, resulting in no complete symbols that can be used to transmit DMRS, and thus the problem that DMRS cannot be transmitted. It can improve the reliability of DMRS transmission.

The reference signal transmission method provided in the embodiments of the present application is described in detail above in conjunction with FIGS. 3 to 66. The communication device provided by the embodiment of the present application will be described in detail below with reference to FIG. 67.

FIG. 67 is a second structural diagram of a communication device provided by an embodiment of the present application. The communication device can be applied to the communication system shown in FIG. 1 to perform the function of the network device in the reference signal transmission method shown in FIG. 3. For ease of description, FIG. 67 only shows the main components of the communication device.

As shown in FIG. 67, the communication device 6700 includes: a processing module 6701 and a transceiver module 6702.

Among them, the processing module 6701 is configured to determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel. The transceiver module 6702 is configured to send a demodulation reference signal to the terminal device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the above-mentioned first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device 6700 may further include a storage module (not shown in FIG. 67), and the storage module stores programs or instructions. When the processing module 6701 executes the program or instruction, the communication device 6700 can execute the function of the network device in the reference signal transmission method shown in FIG. 3.

It should be noted that the communication device 6700 may be a network device, or a chip or a chip system provided in the network device, which is not limited in this application.

The technical effect of the communication device 6700 can refer to the technical effect of the reference signal transmission method shown in FIG. 3, which will not be repeated here.

Optionally, the communication device 6700 may also be applicable to the communication system shown in FIG. 1 to perform the functions of the terminal device in the reference signal transmission method shown in FIG. 3.

Among them, the transceiver module 6702 is used to receive synchronization signal blocks and system messages. The processing module 6701 is configured to determine the first symbol according to the synchronization signal block and the system message. The transceiver module 6702 is also configured to receive the demodulation reference signal from the network device on the first symbol.

Specifically, the first symbol may be a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel.

In a possible design, the number of the first symbol may be one. Correspondingly, the aforementioned one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain.

Further, the above-mentioned first symbol may be: the last symbol before the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the foregoing first symbol may also be: the first symbol located after the symbol occupied by the synchronization signal block in the time domain.

In another possible design, the number of first symbols is two. Correspondingly, one of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain. Or, optionally, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. Alternatively, the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous.

Further, the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, which may include: the two first symbols may be: located in the time domain The first symbol and the last symbol before the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Further, the above two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the above two first symbols are not continuous, which may include: the above two first symbols may be: located in the time domain The first symbol and the last symbol after the symbol occupied by the synchronization signal block, and the two first symbols are not continuous.

Optionally, the communication device 6700 may further include a storage module (not shown in FIG. 67), and the storage module stores programs or instructions. When the processing module 6701 executes the program or instruction, the communication device 6700 can execute the function of the terminal device in the reference signal transmission method shown in FIG. 3.

It should be noted that the communication device 6700 may be a terminal device, or a chip or chip system provided in the terminal device, which is not limited in this application.

The technical effect of the communication device 6700 can refer to the technical effect of the reference signal transmission method shown in FIG. 3, which will not be repeated here.

In another possible design, the communication device 6700 may be applicable to the communication system shown in FIG. 1 to perform the function of the network device in the reference signal transmission method shown in FIG. 42.

Wherein, the processing module 6701 is configured to determine part of the symbols in the symbols occupied by the synchronization signal block as the first symbol. Among them, the synchronization signal block and the data channel occupy the same symbol. The transceiver module 6702 is configured to send a demodulation reference signal to the terminal device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device 6700 may further include a storage module (not shown in FIG. 67), and the storage module stores programs or instructions. When the processing module 6701 executes the program or instruction, the communication device 6700 can execute the function of the network device in the reference signal transmission method shown in FIG. 42.

It should be noted that the communication device 6700 may be a network device, or a chip or a chip system provided in the network device, which is not limited in this application.

For the technical effect of the communication device 6700, reference may be made to the technical effect of the reference signal transmission method shown in FIG. 42, which will not be repeated here.

Optionally, the communication device 6700 may also be applicable to the communication system shown in FIG. 1 to perform the function of the terminal device in the reference signal transmission method shown in FIG. 42.

Among them, the transceiver module 6702 is used to receive synchronization signal blocks and system messages. The processing module 6701 is used to determine the first symbol according to the synchronization signal block and the system message. Among them, the first symbol is a part of the symbols occupied by the synchronization signal block, and the synchronization signal block and the data channel occupy the same symbol. The transceiver module 6702 is also configured to receive the demodulation reference signal from the network device on the first symbol.

In a possible design, the number of the first symbol may be one. Correspondingly, the above-mentioned one first symbol may be any one of the symbols occupied by the synchronization signal block. Among them, the symbols occupied by the synchronization signal block are usually 4 consecutive symbols.

Further, the foregoing one first symbol may be: the second symbol or the third symbol among the symbols occupied by the synchronization signal block.

In another possible design, the number of first symbols is two. Correspondingly, the above two first symbols may be any two non-contiguous symbols among the symbols occupied by the synchronization signal block, such as the first symbol and the third symbol, or the second coincidence and the fourth symbol, or The first symbol and the fourth symbol.

Further, the above two first symbols may be: the first symbol and the last symbol among the symbols occupied by the synchronization signal block.

In a possible design, the demodulation reference signal and the synchronization signal block may adopt a frequency division multiplexing manner to jointly occupy the first symbol. Among them, the synchronization signal block usually occupies part of the RB near the carrier frequency, and the demodulation reference signal may occupy other subcarriers other than the subcarrier occupied by the synchronization signal block. For example, the subcarrier index is greater than, and/or, less than the synchronization signal block. The subcarrier of the subcarrier index.

Optionally, the communication device 6700 may further include a storage module (not shown in FIG. 67), and the storage module stores programs or instructions. When the processing module 6701 executes the program or instruction, the communication device 6700 can execute the function of the terminal device in the reference signal transmission method shown in FIG. 42.

It should be noted that the communication device 6700 may be a terminal device, or a chip or chip system provided in the terminal device, which is not limited in this application.

For the technical effect of the communication device 6700, reference may be made to the technical effect of the reference signal transmission method shown in FIG. 42, which will not be repeated here.

The embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port, where the processor is used to implement the processing functions involved in the foregoing method embodiment, and the input/output port is used to implement the transceiver function involved in the foregoing method embodiment.

In a possible design, the chip system further includes a memory, which is used to store program instructions and data that implement the functions involved in the foregoing method embodiments.

The chip system can be composed of chips, or include chips and other discrete devices.

The embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium stores computer instructions; when the computer instructions are run on a computer, the computer is caused to execute the reference signal described in the foregoing method embodiment Transmission method.

The embodiment of the application provides a computer program product containing instructions, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer executes the reference signal transmission method described in the foregoing method embodiment.

It should be understood that the processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integrated Circuit (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.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, 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. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). 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 Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The foregoing embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination. When implemented by software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this article is only an association relationship describing the associated objects, indicating that there can be three types of relationships, for example, A and/or B can mean: A alone exists, and both A and B exist. , There are three cases of B alone, where A and B can be singular or plural. In addition, the character "/" in this document generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and/or" relationship, which can be understood with reference to the context.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "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). For example, 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 .

It should be understood that, in the various embodiments of the present application, 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.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, 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. In addition, 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.

In addition, the functional units 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.

If 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. Based on this understanding, 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 .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (55)

A method for transmitting a reference signal, characterized in that it comprises: The network device sends a demodulation reference signal to the terminal device on the first symbol; where the first symbol is determined by the symbols occupied by the synchronization signal block, the system message, and the data channel. The reference signal transmission method according to claim 1, wherein the first symbol is a symbol that is not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel. The reference signal transmission method according to claim 2, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain . The reference signal transmission method according to claim 3, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The reference signal transmission method according to claim 3, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The reference signal transmission method according to claim 2, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The reference signal transmission method according to claim 6, wherein the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous ,include: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The reference signal transmission method according to claim 6, wherein the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous ,include: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. A method for transmitting a reference signal, characterized in that it comprises: The terminal device receives the synchronization signal block and parses the system message to determine the first symbol; The terminal device receives the demodulation reference signal from the network device on the first symbol. The reference signal transmission method according to claim 9, wherein the synchronization signal block and the system message are used to indicate that the first symbol is a symbol occupied by a data channel and is not used by the synchronization signal. The symbol occupied by the block and the system message. The reference signal transmission method according to claim 10, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain . The method for transmitting a reference signal according to claim 11, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The method for transmitting a reference signal according to claim 11, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The reference signal transmission method according to claim 10, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The reference signal transmission method according to claim 14, wherein the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous ,include: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The reference signal transmission method according to claim 14, wherein the two first symbols are both located after the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous ,include: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. A communication device, which is characterized by comprising: a processing module and a transceiver module; wherein, The processing module is configured to determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel; The transceiver module is configured to send a demodulation reference signal to a terminal device on the first symbol. The communication device according to claim 17, wherein the first symbol is a symbol that is not occupied by the synchronization signal block and the system message among symbols occupied by the data channel. The communication device according to claim 18, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 19, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 19, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 17, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 22, wherein the two first symbols are both located before symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 22, wherein the two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. A communication device, which is characterized by comprising: a processing module and a transceiver module; wherein, The transceiver module is used to receive synchronization signal blocks and system messages; The processing module is configured to determine a first symbol according to the synchronization signal block and the system message; The transceiver module is further configured to receive a demodulation reference signal from a network device on the first symbol. The communication device according to claim 25, wherein the synchronization signal block and the system message are used to indicate that: among the symbols occupied by the data channel, the first symbol is not occupied by the synchronization signal block and The symbol occupied by the system message. The communication device according to claim 26, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 27, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 27, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 26, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 30, wherein the two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 30, wherein the two first symbols are both located after symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. A communication device, characterized in that, the communication device comprises: a processor and a transceiver; wherein, The processor is configured to determine the first symbol according to the symbols occupied by the synchronization signal block, the system message, and the data channel; The transceiver is configured to send a demodulation reference signal to a terminal device on the first symbol. The communication device according to claim 33, wherein the first symbol is a symbol not occupied by the synchronization signal block and the system message among the symbols occupied by the data channel. The communication device according to claim 34, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 35, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 35, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 34, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 38, wherein the two first symbols are both located before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 38, wherein the two first symbols are both located after symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to any one of claims 33-40, wherein the communication device is a network device. The communication device according to any one of claims 33-40, wherein the communication device is a chip. A communication device, characterized in that, the communication device comprises: a processor and a transceiver; wherein, The transceiver is used to receive synchronization signal blocks and system messages; The processor is configured to determine a first symbol according to the synchronization signal block and the system message; The transceiver is further configured to receive a demodulation reference signal from a network device on the first symbol. The communication device according to claim 43, wherein the synchronization signal block and the system message are used to indicate that: among the symbols occupied by the data channel, the first symbol is not occupied by the synchronization signal block and The symbol occupied by the system message. The communication device according to claim 44, wherein the number of the first symbol is one, and the one first symbol is located before or after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 45, wherein the one first symbol is: the last symbol before the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 45, wherein the one first symbol is: the first symbol located after the symbol occupied by the synchronization signal block in the time domain. The communication device according to claim 44, wherein the number of the first symbols is two; One of the two first symbols is located before the symbol occupied by the synchronization signal block in the time domain, and the other is located after the symbol occupied by the synchronization signal block in the time domain; or, The two first symbols are both located before the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous; or, The two first symbols are both located behind the symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 48, wherein the two first symbols are both located before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol before the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to claim 48, wherein the two first symbols are both located after symbols occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous, comprising: The two first symbols are: the first symbol and the last symbol located after the symbol occupied by the synchronization signal block in the time domain, and the two first symbols are not continuous. The communication device according to any one of claims 43-50, wherein the communication device is a terminal device. The communication device according to any one of claims 43-50, wherein the communication device is a chip. A chip system, characterized in that, the chip system includes a processor and an input/output port, the processor is configured to implement the processing function related to any one of claims 1-16, and the input/output port It is used to realize the transceiver function according to any one of claims 1-16. A readable storage medium, characterized in that the readable storage medium includes a program or instruction, when the program or instruction runs on a computer, the computer executes any one of claims 1-16 The transmission method of the reference signal. A computer program product, characterized in that the computer program product comprises: computer program code, when the computer program code runs on a computer, causes the computer to execute any one of claims 1-16 The transmission method of the reference signal.

Images