Communication method and device

Abstract

The invention provides a communication method and device. Although the DMRS symbol carries the single carrier data, the carried single carrier data and DMRS sequence are subjected to frequency division multiplexing, so that the spectrum efficiency is improved. However, whether the terminal uses this characteristic is related to the capability of the terminal. In the scheme provided by the invention, the network equipment can indicate the terminal to carry the single-carrier data or not carry the single-carrier data in the reference symbol, so that terminals with different capabilities can process the reference symbol differentially, and the transmission performance is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a communication method and device. BACKGROUND

[0002] In a communication system, a data signal sent by a sending end can be received by a receiving end after passing through a transmission channel. The data signal will change in the transmission channel (for example, the data signal will superimpose noise, fade, etc.), so there is a difference between the data signal received by the receiving end and the data signal sent by the sending end. In order to accurately restore the data signal sent by the sending end, the receiving end needs to know what changes the data signal has undergone in the transmission process, and therefore, a reference signal (RS) is introduced.

[0003] The reference signal is a known signal, which can be transmitted together with the data signal in the transmission channel. The receiving end can estimate the changes of the data signal transmitted together with the reference signal in the transmission channel by comparing the difference between the received reference signal and the actual reference signal, so as to restore the received data signal to the data signal sent by the sending end. In addition, the reference signal can also be used for channel quality measurement, obtaining the weight of analog beamforming or sensing a target, etc.

[0004] Generally, the reference signal and the data signal are sent in a time division multiplexing manner, that is, the reference signal and the data signal are sent through different symbols. In order to improve the spectral efficiency, it is proposed that the symbol carrying the reference signal also carries the data signal, specifically, the reference signal and the data signal occupy different frequency domain resources. This way will make the peak to average power ratio (PAPR) of the transmitted signal higher, resulting in lower transmission power of the transmitted signal, which affects the coverage. SUMMARY

[0005] Through analysis, it is found that the RS symbol carrying the RS sequence also carries single carrier data, where the carried single carrier data and the RS sequence are frequency division multiplexed, which is beneficial to improving the spectral efficiency. However, whether the terminal uses this feature is related to the capability of the terminal.

[0006] Therefore, the present application provides a communication method and device, and the network equipment can instruct the terminal to carry single carrier modulated first data or not to carry single carrier modulated first data in the reference symbol, which is beneficial to differentially processing the reference symbol by terminals with different capabilities, so as to improve the spectral efficiency or communication capacity.

[0007] The technical solutions provided by the present application are introduced below.

[0008] In a first aspect, the present application provides a communication method, which can be performed by a first device. In the present application, the "first device" can refer to the first device itself, or a component in the first device, such as a processor, circuit, logic module, software, chip, or chip system, etc., which is used to implement all or part of the functions of the first device. For example, the first device is a terminal. The possible forms of the terminal will be described later, which will not be expanded here.

[0009] In the method, the first device receives first information sent by a second device, the first information indicating that a reference symbol carries first data, or the first information indicating that the reference symbol does not carry the first data, wherein the first data is modulated by a single carrier. In this way, it is beneficial to process the reference symbol differently for terminals with different capabilities, and to support differentiated terminals. For example, it is beneficial to support terminals that carry first data in the reference symbol, and not to support terminals that do not carry first data in the reference symbol.

[0010] For example, the second device is a wireless access device. The possible forms of the wireless access device will be described later, which will not be expanded here.

[0011] The reference symbol (or RS symbol) can be a symbol where the RS sequence is located. As an example, the RS sequence can be a demodulation reference signal (DMRS) sequence, a sounding reference signal (SRS) sequence, a tracking reference signal (TRS) sequence, or a channel state information reference signal (CSI-RS) sequence. Correspondingly, the reference symbol can be a DMRS symbol, an SRS symbol, a TRS symbol, or a CSI-RS symbol.

[0012] In a possible implementation of the first aspect, in the method, the first device further processes the reference symbol after receiving the first information. In the present application, the first device processing the reference symbol can include the first device sending the reference symbol or receiving the reference symbol. Based on the first information indicating that the reference symbol carries the first data, the reference symbol processed by the first device can carry the first data, and based on the first information indicating that the reference symbol does not carry the first data, the reference symbol processed by the first device can not carry the first data.

[0013] In a possible implementation of the first aspect, the reference symbol carrying the first data can include that the reference symbol carries an RS sequence and the first data, and the RS sequence and the first data do not overlap in frequency domain resources, or in other words, the RS sequence and the first data are frequency division multiplexed.

[0014] In a possible implementation of the first aspect, the reference symbol not carrying the first data can include that the reference symbol does not carry data, or the reference symbol carries data modulated by a non-single carrier modulation (such as a multi-carrier modulation).

[0015] In a possible implementation of the first aspect, before receiving the first information sent by the second device, the first device sends second information to the second device, the second information indicating a first condition, the first condition being a condition that one or more parameters satisfy, the one or more parameters being parameters related to processing service data by the first device, the service data including the first data, the first condition being related to a first capability. In this application, the first capability includes that the reference symbol carries the first data.

[0016] In this application, the first condition being related to the first capability can be understood as that the satisfaction of the first condition is related to whether the first device supports the first capability or the satisfaction of the first condition is related to whether the reference symbol carries the first data.

[0017] In this application, the satisfaction of the first condition can be replaced by whether the first condition is satisfied, and whether the first device supports the first capability can be replaced by whether the first device supports processing the reference symbol carrying the first data or whether the first device supports the reference symbol carrying the first data.

[0018] In a possible implementation of the first aspect, when the first condition is satisfied, the first device supports the first capability.

[0019] In a possible implementation of the first aspect, when the first condition is not satisfied, the first device does not support the first capability. In this application, the first condition not being satisfied can be understood as that all or part of the one or more parameters do not satisfy the first condition.

[0020] Through the above implementation, it is beneficial for the second device to determine whether the reference symbol carries the first data based on the second information sent by the first device, and then determine the first information. For example, for the first device, when the one or more parameters satisfy the first condition, the first capability is supported, or when the one or more parameters satisfy the first condition, the first device expects the reference symbol to carry the first data to improve the spectral efficiency or the communication capacity. The first device sends the second information to the second device, the second information indicating the first condition. The second device receives the second information sent by the first device, and can obtain the first condition. The second device determines whether the reference symbol carries the first data based on the obtained first condition. For example, if the parameters actually related to the transmission of service data between the second device and the first device satisfy the first condition, the reference symbol carries the first data, and therefore, the first message indicates that the reference symbol carries the first data; if the parameters actually related to the transmission of service data between the second device and the first device do not satisfy the first condition, the reference symbol does not carry the first data, and therefore, the first message indicates that the reference symbol does not carry the first data.

[0021] In a possible implementation of the first aspect, the service data further comprises the second data, the second data occupies different time domain resources from the reference symbols, and the second data is modulated by single carrier modulation. In other words, the second data is carried in data symbols, and the data symbols and the reference symbols are different time domain symbols.

[0022] In a possible implementation of the first aspect, the first device processes data symbols in addition to the reference symbols.

[0023] In a possible implementation of the first aspect, a peak-to-average power ratio (PAPR) of the reference symbols is not higher than a PAPR of the data symbols.

[0024] In a possible implementation of the first aspect, the one or more parameters comprise a number of the reference symbols, a time domain resource overhead of the reference symbols, or a bandwidth for transmitting the service data.

[0025] In a possible implementation, the first device processes a number of RS symbols, where a is a positive integer.

[0026] In a possible implementation, the first device processes a number of RS symbols and b data symbols, and a time domain resource overhead of the reference symbols is where a and b are both positive integers.

[0027] In a possible implementation, the one or more parameters comprise a modulation order of the second data. In this way, it can be guaranteed that, when the first capability is supported, a PAPR of the RS symbols does not exceed a PAPR of data symbols carrying the second data and / or a certain capacity gain is obtained by carrying the first data by using the RS symbols.

[0028] In a possible implementation, the one or more parameters comprise a modulation and coding scheme (MCS) of the second data. In this way, it can be guaranteed that, when the first capability is supported, a PAPR of the RS symbols does not exceed a PAPR of data symbols carrying the second data and / or a certain capacity gain is obtained by carrying the first data by using the RS symbols.

[0029] In a possible implementation, the one or more parameters comprise a Zadoff-Chu (ZC) sequence root of the RS sequence. In this way, it can be guaranteed that, when the first capability is supported, a PAPR of the RS symbols does not exceed a PAPR of data symbols carrying the second data.

[0030] In a possible implementation, the one or more parameters comprise an overhead of the RS sequence. In this way, it can be guaranteed that, when the first capability is supported, a PAPR of the RS symbols does not exceed a PAPR of data symbols carrying the second data.

[0031] In a possible implementation, the one or more parameters comprise: a modulation order of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0032] In a possible implementation, the one or more parameters comprise: a modulation and coding scheme (MCS) of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0033] In a possible implementation, the one or more parameters comprise: a modulation order of the second data, an overhead of the RS sequence, a bandwidth for transmitting the service data. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0034] In a possible implementation, the one or more parameters comprise: a modulation and coding scheme (MCS) of the second data, an overhead of the RS sequence, a bandwidth for transmitting the service data. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0035] In a possible implementation, the one or more parameters comprise: a modulation order of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence, an overhead of the RS sequence. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0036] In a possible implementation, the one or more parameters comprise: a modulation and coding scheme (MCS) of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence, an overhead of the RS sequence. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data when the first capability is supported and / or a certain capacity gain is obtained by carrying the first data with the RS symbol.

[0037] In a possible implementation, the one or more parameters comprise: a modulation order of the second data, a modulation and coding scheme (MCS) of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence, an overhead of the RS sequence. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data and / or a certain capacity gain is obtained by carrying the first data by using the RS symbol when the first capability is supported.

[0038] In a possible implementation, the one or more parameters comprise: a modulation order of the second data, a modulation and coding scheme (MCS) of the second data, a Zadoff-Chu (ZC) sequence root of the RS sequence, an overhead of the RS sequence or a bandwidth for transmitting the service data. In this way, it can be guaranteed that the PAPR of the RS symbol does not exceed the PAPR of the data symbol carrying the second data and / or a certain capacity gain is obtained by carrying the first data by using the RS symbol when the first capability is supported.

[0039] In a possible implementation, the one or more parameters comprise: a number of the reference symbols. In this way, a certain capacity gain can be obtained by carrying the first data by using the RS symbol.

[0040] In a possible implementation, the one or more parameters comprise: a time domain resource overhead of the reference symbols. In this way, a certain capacity gain can be obtained by carrying the first data by using the RS symbol.

[0041] In a possible implementation, the one or more parameters comprise: a number of the reference symbols, a time domain resource overhead of the reference symbols. In this way, a certain capacity gain can be obtained by carrying the first data by using the RS symbol.

[0042] In a possible implementation, the first condition is a condition that the one or more parameters satisfy, and the first condition is a threshold corresponding to the one or more parameters.

[0043] In a possible implementation, the first condition comprises a plurality of second conditions, and each second condition is only related to one parameter.

[0044] For example, the one or more parameters comprise: a modulation order of the second data and a Zadoff-Chu (ZC) sequence root of the RS sequence. The first condition comprises two second conditions. The first second condition corresponds to a threshold of the Zadoff-Chu (ZC) sequence root of the RS sequence, and is irrelevant to the modulation order of the second data. The second second condition corresponds to a threshold of the modulation order of the second data, and is irrelevant to the Zadoff-Chu (ZC) sequence root of the RS sequence.

[0045] In one possible implementation, the first condition contains multiple second conditions, and at least one of the second conditions is related to one or more parameters.

[0046] For example, one or more parameters include the modulation order of the second data, the Zadov-Zoo ZC sequence root of the RS sequence, and the overhead of the RS sequence. The first condition includes a second condition. The second condition is a threshold regarding the ZC sequence root. This threshold is related to both the modulation order of the second data and the overhead of the RS sequence.

[0047] For example, the first condition includes two second conditions. The first second condition is a threshold regarding the modulation order of the second data, which is independent of the Zadov-Zhu ZC sequence root of the RS sequence and the overhead of the RS sequence. The second second condition is a threshold regarding the ZC sequence root. This threshold is related to both the modulation order of the second data and the overhead of the RS sequence.

[0048] The above examples only illustrate a few possible combinations of different parameters contained in one or more parameters. In actual applications, one or more parameters may include other combinations of different parameters, which will not be listed here.

[0049] In one possible implementation of the first aspect, the method involves the first device sending third information to the second device before receiving the first information sent by the second device, the third information indicating the capabilities of the first device.

[0050] In one possible implementation, the third information indicates whether the first device supports pi / 2-binary phase shift keying (BPSK).

[0051] In one possible implementation, the third information indicates whether the first device supports a first processing method, wherein the first processing method is used to reduce the PAPR of the reference symbol. Possible types of the first processing method will be illustrated later and will not be discussed further here. In one possible implementation, the third information indicates whether the first device supports pi / 2-binary phase shift keying (BPSK) and / or the first processing method.

[0052] Through the above implementation, the second device can determine whether to allow the reference symbol to carry the first data based on the third information sent by the first device, thereby determining the first message. For example, when the second device cannot obtain the third message, or can obtain the third message but the third message indicates that the first device cannot support the first processing method, the first device determines that the reference symbol should not carry data, and the first message indicates that the reference symbol should not carry the first data. When the second device can obtain the third message, and the third message indicates that the first device supports the first processing method, such as the first processing method being to make the modulation order of the first data lower than the modulation order of the second data and / or reduce the energy per resource unit (EPRE) of the first data. It should be understood that by making the modulation order of the first data lower than the modulation order of the second data and / or reducing the EPRE of the first data, the PAPR of the reference symbol can be made not to exceed the PAPR of the data symbol carrying the second data. At this time, based on the third message, the second device determines that the reference symbol carries the first data, and the modulation order of the first data is lower than the modulation order of the second data and / or the EPRE of the first data is reduced. Accordingly, the first message indicates that the reference symbol carries the first data.

[0053] For example, the first device supports pi / 2-BPSK (it should be understood that the modulation order of pi / 2-BPSK is 1) and also supports a first processing method, where the first processing method is to make the modulation order of the first data lower than that of the second data and / or reduce the EPPR of the first data. Through the third message, the second device knows that the first device supports pi / 2-BPSK and the first processing method. When the modulation order of the second data is 2 or higher, the second device can determine a reference symbol design scheme: the reference symbol carries the first data using the pi / 2-BPSK sequence, that is, the first processing method ensures that the PAPR of the reference symbol does not exceed the PAPR of the data symbol carrying the second data. Accordingly, the first message instructs the reference symbol to carry the first data.

[0054] For example, the first device does not support pi / 2-BPSK but supports a first processing method, where the modulation order of the first data is lower than that of the second data and / or the EPRE of the first data is reduced. In this case, the second device knows through a third message that it does not support pi / 2-BPSK but supports the first processing method. When the modulation order of the second data is 2, the second device knows that it cannot reduce the PAPR of the reference symbol when the reference symbol carries the first data by lowering the modulation order of the first data to 1. Therefore, when the modulation order of the second data is 2, the second device determines that the reference symbol does not carry the first data, and correspondingly, the first message indicates that the reference symbol does not carry the first data. When the modulation order of the second data is 4 or higher, the second device determines that the reference symbol carries the first data, where the modulation order of the first data is not 1 and is lower than that of the second data and / or the EPRE of the first data is reduced, and correspondingly, the first message indicates that the reference symbol carries the first data. In this case, the first information can instruct the reference symbol to carry the first data to reduce the PAPR of the reference symbol.

[0055] In one possible implementation of the first aspect, the third information relates to the first capability.

[0056] In one possible implementation of the first aspect, the third information is related to the first capability, which can be understood as the first device supporting the first capability when it processes business data in the manner indicated by the third information.

[0057] In one possible implementation of the first aspect, the third information relates to the first capability. This can be understood as meaning that the first device may not support the first capability when it does not process business data using the method indicated by the third information. As described above, the method indicated by the third information includes pi / 2-BPSK and / or the first processing method.

[0058] In this application, "related" can also be replaced with "related" or "associated," etc. The first device processing business data can be understood as the first device processing reference symbols and / or processing data symbols.

[0059] In one possible implementation of the first aspect, the method involves the first device sending a fourth message to the second device before receiving the first message sent by the second device, the fourth message indicating whether the first capability is supported or not.

[0060] This allows the second device to determine whether the first device supports the first capability based on the fourth information sent by the first device, and then determine the first information based on whether the first device has the first capability. For example, when the first device does not support the first capability, the first information can instruct the reference symbol to carry the first data to avoid the first device failing to transmit service data. For example, when the first device supports the first capability, the first information can instruct the reference symbol to carry the first data.

[0061] In one possible implementation of the first aspect, the first information is carried by at least one of the following: downlink control information (DCI), radio resource control (RRC) message, or media access control unit (MAC-CE).

[0062] Secondly, this application provides a communication method that can be executed by a second device. In this application, "second device" can refer to the second device itself or a component within the second device. This component may be, for example, a processor, circuit, logic module, software, chip, or chip system, and is used to implement all or part of the functions of the second device. For example, the second device is a wireless access device. Possible forms of wireless access devices will be described later and will not be elaborated upon here.

[0063] In this method, a second device sends first information to a first device, the first information indicating that the reference symbol carries first data, or the first information indicating that the reference symbol does not carry first data, wherein the first data is modulated using single-carrier modulation. This facilitates differentiated processing of reference symbols by terminals with varying capabilities, supporting differentiated terminals. For example, it benefits terminals that support carrying first data in reference symbols by including the first data in the reference symbols. Conversely, it benefits terminals that do not support carrying first data in reference symbols by not including the first data in the reference symbols.

[0064] The first information or the content indicated by the first information can be understood with reference to the relevant content of the first aspect. For example, a reference symbol carrying first data may include the reference symbol carrying an RS sequence and the first data; a reference symbol not carrying first data may include the reference symbol not carrying data, or the reference symbol carrying data using non-single-carrier modulation (such as multi-carrier modulation). For example, in one possible implementation, the RS sequence may be a demodulation reference signal (DMRS) sequence, a sounding reference signal (SRS) sequence, a tracking reference signal (TRS) sequence, or a channel state information reference signal (CSI-RS) sequence. Accordingly, the reference symbol may be a DMRS symbol, an SRS symbol, a TRS symbol, or a CSI-RS symbol. For example, in one possible implementation, the first information is carried by at least one of the following: downlink control information (DCI), radio resource control (RRC) message, or media access control and control unit (MAC-CE).

[0065] In one possible implementation of the second aspect, the method involves the second device receiving second information sent by the first device before sending the first information to the first device.

[0066] The second information, or the content indicated by the second information, can be understood by referring to the relevant content in the first aspect.

[0067] For example, in one possible implementation of the second aspect, the second information indicates a first condition, which is a condition satisfied by one or more parameters, the one or more parameters being parameters involved in the first device processing business data, the business data including the first data, the first condition relating to a first capability, the first capability including the reference symbol carrying the first data.

[0068] For example, in one possible implementation of the second aspect, the one or more parameters include at least one of the following: the modulation order of the second data, the modulation and coding scheme (MCS) of the second data, the Zadov-Zoo ZC sequence root of the RS sequence, the overhead of the RS sequence, the number of reference symbols, the time-domain resource overhead of the reference symbols, or the bandwidth for transmitting the data. The service data and the second data can be understood with reference to the relevant content in the first aspect. For example, the second data is carried in data symbols, and the service data includes the first data carried in the reference symbols and the second data carried in the data symbols.

[0069] In one possible implementation of the second aspect, the method involves the second device receiving third information sent by the first device before sending the first information to the first device.

[0070] The third information, or the content indicated by the third information, can be understood with reference to the relevant content of the first aspect. For example, the third information indicates the capabilities of the first device.

[0071] In one possible implementation of the second aspect, the method involves the second device receiving fourth information sent by the first device before sending the first information to the first device. The fourth information indicates whether the first capability is supported or not, and the first capability includes the reference symbol carrying the first data.

[0072] In one possible implementation of the second aspect, the first information is determined based on at least one of a plurality of information, including channel quality, the second information, the third information, and the fourth information, etc.

[0073] For example, if the second device has not received any of the second, third, or fourth information before sending the first information to the first device, the second device can determine the first information based on channel quality. Channel quality can be the quality of a first channel used for transmitting service data.

[0074] For example, based on the fact that the second device receives target information before sending the first information to the first device, the second device can determine the first information according to at least one of the channel quality and the target information. The target information may include at least one of the second, third, or fourth information described above.

[0075] In one possible implementation of the second aspect, the first information is determined based on at least one of a plurality of information. This can be understood as follows: when a first target condition is met, the first information indicates that the reference symbol carries the first data. The first target condition may include at least one of the following:

[0076] The second device receives the second information sent by the first device, and one or more parameters satisfy the first condition indicated by the second information;

[0077] The second device receives the third information sent by the first device, and the first device processes the business data in the manner indicated by the third information.

[0078] The second device receives a fourth message sent by the first device, and the fourth message indicates support for the first capability; or,

[0079] The channel quality meets the channel quality conditions.

[0080] In this application, channel quality refers to the quality of the channel used for transmitting service data.

[0081] In one possible implementation of the second aspect, the first information is determined based on at least one of a plurality of information. This can be understood as follows: when the second objective condition is met, the first information indicates that the reference symbol does not carry the first data. Meeting the second objective condition can be determined based on at least one of the plurality of information described above. The second objective condition may include at least one of the following:

[0082] The second device did not receive the second information sent by the first device;

[0083] The second device receives the second information sent by the first device, and all or part of the parameters in one or more parameters do not meet the first condition indicated by the second information;

[0084] The second device did not receive the third message sent by the first device;

[0085] The second device receives the third information sent by the first device, and the first device does not process the business data in the manner indicated by the third information;

[0086] The second device did not receive the fourth message sent by the first device;

[0087] The second device receives a fourth message sent by the first device, and the fourth message indicates that the first capability is not supported; or,

[0088] The channel quality does not meet the channel quality requirements.

[0089] In one possible implementation of the second aspect, the first information is determined based on at least one of a plurality of information. This can be understood as the first information indicating that the reference symbol carries first data when a third objective condition is met. The third objective condition may include at least one of the following: the first device supports a first capability, or the channel quality meets a channel quality condition.

[0090] In one possible implementation of the second aspect, the first information is determined based on at least one of a plurality of information. This can be understood as the first information indicating that the reference symbol does not carry the first data when the fourth objective condition is met. The fourth objective condition may include at least one of the following: the first device does not support the first capability, or the channel quality does not meet the channel quality condition.

[0091] In one possible implementation of the second aspect, the second device determines that the first device supports the first capability when the fifth objective condition is met. The fifth objective condition may include at least one of the following:

[0092] The second device receives the second information sent by the first device, and one or more parameters satisfy the first condition indicated by the second information;

[0093] The second device receives the third information sent by the first device, and the first device processes the business data in the manner indicated by the third information.

[0094] The second device receives a fourth message sent by the first device, and the fourth message indicates support for the first capability.

[0095] In one possible implementation of the second aspect, the second device determines that the first device does not support the first capability when the sixth objective condition is met. The sixth objective condition may include at least one of the following:

[0096] The second device did not receive the second information sent by the first device;

[0097] The second device receives the second information sent by the first device, and all or part of the parameters in one or more parameters do not meet the first condition indicated by the second information;

[0098] The second device did not receive the third message sent by the first device;

[0099] The second device receives the third information sent by the first device, and the first device does not process the business data in the manner indicated by the third information;

[0100] The second device did not receive the fourth message sent by the first device;

[0101] The second device receives a fourth message sent by the first device, and the fourth message indicates that the first capability is not supported.

[0102] Thirdly, this application provides a communication device. The communication device includes a transceiver unit. Optionally, the communication device may further include a processing unit.

[0103] In one possible implementation of the third aspect, the communication device is used to perform a method as described in the first aspect or any implementation thereof. Specifically, the transceiver unit may be used to perform the transmission and / or reception operations performed by the first device, and the processing unit may be used to perform the internal processing operations performed by the first device. For example, the transceiver unit may be used to receive first information transmitted by the second device, and the processing unit may be used to process the first information, for example, to determine whether a reference symbol carries first data based on the first information.

[0104] In one possible implementation of the third aspect, the communication device is used to perform a method as described in the second aspect or any implementation thereof. Specifically, the transceiver unit can be used to perform the sending and / or receiving operations performed by the second device, and the processing unit can be used to perform the internal processing operations performed by the second device. For example, the processing unit is used to determine first information, and the transceiver unit is used to send the first information to the first device.

[0105] Fourthly, this application provides a communication device comprising at least one processor, the at least one processor being configured to execute a computer program stored in a memory to implement the method as described in the first aspect and any implementation thereof, or the processor being configured to execute the computer program stored in the memory to implement the method as described in the second aspect and any implementation thereof.

[0106] Optionally, the communication device further includes the memory. The at least one processor is coupled to the memory.

[0107] Fifthly, this application provides a chip including a processor coupled to a memory for storing a computer program, the processor for executing the computer program stored in the memory to implement the method as described in the first aspect and any implementation thereof, or the processor for executing the computer program stored in the memory to implement the method as described in the second aspect and any implementation thereof.

[0108] In a sixth aspect, this application provides a computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, when the computer program or instructions are executed by a processor, the method described in the first aspect and any implementation thereof is executed, or the method described in the second aspect and any implementation thereof is executed.

[0109] In a seventh aspect, this application provides a computer program product containing instructions that, when run on a computer, cause the method described in the first aspect and any implementation thereof to be executed, or the method described in the second aspect and any implementation thereof to be executed.

[0110] Eighthly, this application provides a communication system including a first device and a second device, the first device being configured to perform the methods of the first aspect and any possible implementation thereof, and the second device being configured to perform the methods of the second aspect and any possible implementation thereof.

[0111] The beneficial effects of aspects three through eight can be referenced in the beneficial effects of aspects one through two, and will not be elaborated here. Attached Figure Description

[0112] Figure 1A This is a schematic diagram of the architecture of an orthogonal frequency division multiplexing (OFDM) system.

[0113] Figure 1B A schematic diagram of the architecture of a Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) system;

[0114] Figure 1C This is a schematic diagram of the input / output power curves of a power amplifier;

[0115] Figure 1DThis is a schematic diagram of a dual-symbol demodulation reference signal (DMRS) Type 1.

[0116] Figure 1E This is a schematic diagram of a double-symbol DMRS Type 2.

[0117] Figure 1F A schematic diagram showing the data within a resource block (RB) and the resources occupied by DMRS;

[0118] Figure 1G A diagram illustrating data within one RB and the resources occupied by DMRS. Figure 2 ;

[0119] Figure 1H A schematic diagram of frequency division multiplexing of a reference sequence and data modulated by a single carrier.

[0120] Figure 1I The FDMs with Δ=3 and Δ=4 are schematically shown respectively;

[0121] Figure 2 A schematic diagram of the communication system architecture provided in this application;

[0122] Figure 3 A flowchart illustrating the communication method provided in this application;

[0123] Figure 4 This illustration shows the PAPR of a single DMRS sequence.

[0124] Figure 5 The schematic diagram illustrates the PAPR of the DMRS symbol when the DMRS overhead (OH) is 1 / 2, 1 / 3, 1 / 4, and 1 / 6;

[0125] Figure 6 This schematic diagram illustrates an FDM+Time Division Multiplexing (TDM) scheme.

[0126] Figure 7 The illustration schematically shows a scheme for reducing the modulation order of frequency division data and / or reducing EPRE;

[0127] Figure 8 A simplified schematic diagram of a terminal structure is shown;

[0128] Figure 9 A simplified schematic diagram of a RAN node is shown. Detailed Implementation

[0129] Before introducing the technical solution of this application, the relevant technical terms involved in this application are explained. It is understood that these explanations are intended to make this application easier to understand and should not be regarded as a limitation on the scope of protection claimed in this application.

[0130] 1. Orthogonal Frequency Division Multiplexing (OFDM)

[0131] OFDM is a multi-carrier modulation (MCM) technique. Its core principle is to divide the channel into several orthogonal sub-channels and perform narrowband modulation and transmission on each sub-channel to reduce interference between sub-channels. For example, Figure 1A A schematic diagram of the OFDM system architecture is shown. Figure 1A In this process, the data sequence at the transmitting end can be sequentially processed through serial-to-parallel (S / P) conversion, subcarrier mapping, N-point inverse discrete fourier transform (IDFT), parallel-to-serial (P / S) conversion, cyclic prefix addition (CP), and digital-to-analog converter (DAC) conversion before being transmitted as a radio frequency (RF) signal. This signal then reaches the receiving end after being transmitted through the channel. Correspondingly, the signal received at the receiving end can be sequentially processed through analog-to-digital converter (ADC), cyclic prefix removal, serial-to-parallel conversion, N-point discrete fourier transform (DFT), subcarrier demapping / equalization, and parallel-to-serial conversion to obtain the aforementioned data sequence.

[0132] Taking a data sequence of S(kM), S(kM+1), ..., S(kM+M-1) as an example, serial-to-parallel conversion can transform the data sequence into an M-dimensional data block, such as S k =[S(kM),S(kM+1),…,S(kM+M-1)] T Where k is the OFDM symbol number, [] T This indicates transpose. S can be achieved through subcarrier mapping. k The M data carried modulate N subcarriers.sc N subcarriers, of which N sc =M, the rest (NN) sc The subcarriers can be understood as being modulated by data 0. After subcarrier mapping, an N-dimensional data vector X can be obtained. k X k After N-point IDFT and parallel-to-serial conversion, a set of N complex time-domain sampling points x can be obtained. k (0),x k (1),…,x k (N-1).

[0133] After parallel-to-serial conversion, the transmitter can insert a guard field at the beginning of each OFDM symbol, such as adding a CP at the beginning of the OFDM symbol, to eliminate inter-symbol interference (ISI) caused by multipath propagation (such as radio signals reaching the receiver through two or more paths). Let the OFDM symbol be x. k Taking (n) as an example, the sender can copy x. k The last G sampling points of (n) are appended to x. k At the beginning of (n), the time-domain OFDM signal is obtained. That is, an OFDM symbol contains valid data x k (n) and CP, where CP can be considered as redundant data.

[0134] Correspondingly, after receiving the OFDM signal, the receiver can demodulate it through inverse processing. For example, if time and frequency synchronization can be obtained and the cyclic prefix length is sufficient, the receiver can perform a cyclic prefix removal operation (e.g., removing the first G samples from the received signal) to obtain a data block containing N samples with no ISI. This data block can be equivalent to the OFDM symbol x. k The time-domain circular convolution is then performed with the channel impulse response. Subsequently, the receiver can convert the time-domain circular convolution into a frequency-domain dot product using DFT, and then perform channel equalization with low complexity using frequency-domain single-tap equalization.

[0135] As is understandable, the above data sequence is a sequence obtained by modulating a data signal, so S k This can include modulation symbols and / or redundant signal sampling points. Modulation symbols, also known as modulation signals, can be obtained by modulating a (coded) bitstream. Redundant signal sampling points can include phase tracking reference signal (PTRS) sampling points, demodulation reference signals, tone-preserving signals, etc.

[0136] Understandable, if N scN represents the number of subcarriers within the transmission bandwidth. sc It can be equal to M, N sc It can also be greater than M. For example, in this application, S of length M can be... k Perform sequence expansion, assuming the length of the expanded sequence is equal to N. sc .

[0137] 2. Discrete Fourier Transform Spreading OFDM (DFT-s-OFDM)

[0138] DFT-s-OFDM, also known as single-carrier OFDM or linear precoding OFDM, is a single-carrier technology based on OFDM waveforms. It can also be understood as a modulation method that uses multiple carriers to achieve a single-carrier waveform. The difference between DFT-s-OFDM and OFDM is that the transmitter can perform DFT before subcarrier mapping, which gives the DFT-s-OFDM signal single-carrier characteristics. Correspondingly, the receiver can perform IDFT after subcarrier demapping. For example... Figure 1B A schematic diagram of the architecture of a DFT-s-OFDM system is shown. Figure 1B In this process, the data sequence at the transmitting end can sequentially undergo serial-to-parallel conversion, M-point DFT, subcarrier mapping, N-point IDFT, parallel-to-serial conversion, cyclic prefix addition, and digital-to-analog conversion before being transmitted as a radio frequency signal. This signal reaches the receiving end after transmission through the channel. Correspondingly, the signal received at the receiving end can sequentially undergo analog-to-digital conversion, cyclic prefix removal, serial-to-parallel conversion, N-point DFT, subcarrier mapping removal, M-point IDFT, and parallel-to-serial conversion to obtain the aforementioned data sequence. Specifically, the M-dimensional data block S obtained after serial-to-parallel conversion and M-point DFT at the transmitting end... k This may include modulation symbols and / or redundant signal sampling points. Modulation symbols can be obtained by modulating the (encoded) bitstream. Redundant signal sampling points may include PTRS sampling points, unique words, zeros, etc.

[0139] 3. Modulation method

[0140] The above Figure 1A and Figure 1B The data sequences in the code are all obtained through modulation. In practical applications, there are various modulation methods, such as pulse amplitude modulation (PAM), frequency shift keying (FSK), phase shift keying (PSK), and BPSK. Quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), amplitude phase shift keying (APSK), and offset quadrature amplitude modulation (OQAM) are some of the techniques used. QPSK can also be referred to as 4QAM.

[0141] For example, taking a BPSK modulation mapper as an example, this mapper can map 1 bit in a bitstream to 1 BPSK symbol. For instance, the i-th bit b(i) in the bitstream can be mapped to the i-th BPSK symbol d(i) according to the following relationship:

[0142] For example, with Taking a modulation mapper as an example, this mapper can map 1 bit in a bitstream to 1... Symbols. For example, the i-th bit b(i) in a bitstream can be mapped to the i-th bit according to the following relationship. Symbol d(i): As can be seen from the above mapping relationship, two adjacent symbols in a symbol sequence The symbol exhibits a 90-degree phase transition.

[0143] For example, a QPSK modulation mapper can map two consecutive bits in a bitstream to one QPSK symbol. For instance, the 2i-th bit b(2i) and the (2i+1)-th bit b(2i+1) in the bitstream can be mapped to the i-th QPSK symbol d(i) according to the following relationship:

[0144] For example, taking a 16QAM modulation mapper as an example, this mapper can map four consecutive bits in a bitstream to one 16QAM symbol. For instance, the 4i-th bit b(4i), the (4i+1)-th bit b(4i+1), the (4i+2)-th bit b(4i+2), and the (4i+3)-th bit b(4i+3) in the bitstream can be mapped to the i-th 16QAM symbol d(i) according to the following relationship:

[0145] It should be understood that the above are only some examples of mapping bits in a bitstream to symbols. In specific applications, other mapping relationships / implementations / methods may exist. Taking BPSK modulation as an example, the i-th bit b(i) in the bitstream can also be mapped to the i-th BPSK symbol d(i) according to the following relationship: Where ε is a constant.

[0146] 4. Nonlinear characteristics of power amplifiers (PA)

[0147] Before being transmitted through the antenna, the signal is amplified by a power amplifier. Typically, the behavior of a power amplifier is described by its amplitude modulation-amplitude modulation (AM-AM) characteristics. For example, Figure 1C The AM-AM curve of a power amplifier is shown, which describes the functional relationship between the amplifier's output power and its input power. In the linear region, the amplifier's output power increases linearly with the input power; that is, the amplifier's gain (e.g., the ratio of output power to input power) remains constant, or the slope of the AM-AM curve remains constant. As the input power continues to increase, the amplifier enters the nonlinear region. The output power no longer increases linearly with the input power, the amplifier's gain is compressed, and the AM-AM curve slope decreases. When the saturation output power is reached, the amplifier's output power no longer increases with increasing input power, and the AM-AM curve slope becomes 0. Therefore, in the nonlinear region, the power amplifier exhibits nonlinear characteristics.

[0148] The nonlinear characteristics of power amplifiers lead to both in-band and out-of-band distortion in the transmitted signal. In-band distortion primarily manifests as amplitude and phase distortion, degrading demodulation / detection performance. Out-of-band distortion mainly manifests as spectral spread / regeneration, increasing interference to users in adjacent channels. Therefore, to mitigate the effects of power amplifier nonlinearity, the input signal power can be appropriately reduced, such as through input backoff (IBO) or output backoff (OBO), to keep the power amplifier operating within its linear region. This approach comes at the cost of reduced power amplifier efficiency.

[0149] 5. Peak to average power ratio (PAPR)

[0150] PAPR refers to the ratio of the peak power to the mean power of a signal over a certain period of time. The unit of PAPR can be dB. For example, if the peak power of signal x(t) is 10 ... The mean power of signal x(t) is The PAPR of this signal satisfies the following relationship:

[0151] Understandably, communication signals (such as OFDM signals or DFT-s-OFDM signals) are random signals. Their mean power can be considered a fixed value, while their peak power is a random variable. Therefore, the PAPR of a communication signal is also a random variable. In statistics, the value of a random signal at a certain moment is often described by a probability density function. Therefore, in the communications industry, engineers often use the complementary cumulative distribution function (CCDF) curve to describe PAPR. For example, the probability that the instantaneous power exceeds the mean power by xx dB is yy, or the proportion of time when the instantaneous power exceeds the mean power by xx dB is yy. Specifically, this can be described by the following relationship:

[0152]

[0153] Where P(·) represents probability.

[0154] Understandably, a higher PAPR (Power Amplifier Back-Up Rate) for the input signal of a power amplifier means a wider range of input power fluctuation. Therefore, to ensure the entire input / output signal remains within the linear region, more power back-up is required. Thus, designing a signal with low PAPR can reduce the input / output power back-up of the power amplifier, increase signal transmission power, and improve signal coverage.

[0155] Single-carrier signals have a significantly lower PAPR than multi-carrier signals. For example, the PAPR of a DFT-s-OFDM signal, which possesses single-carrier characteristics, is much lower than that of an OFDM signal. With the same power amplifier, a DFT-s-OFDM signal can provide greater output power and higher power amplifier efficiency, thereby improving coverage and reducing energy consumption.

[0156] 6. Port

[0157] A port, also known as an antenna port, is a logical concept. One antenna port can correspond to one physical transmit antenna or multiple physical transmit antennas. In both cases, the terminal's receiver will not decompose signals from the same antenna port. From the terminal's perspective, regardless of whether the channel is formed by a single physical transmit antenna or by combining multiple physical transmit antennas, the reference signal (RS) corresponding to this antenna port defines it. For example, the antenna port corresponding to the demodulation reference signal (DMRS) is the DMRS port, and the terminal can obtain the channel estimate for this antenna port based on this reference signal. Each antenna port corresponds to a time / frequency resource grid and has its own independent reference signal. One antenna port is one channel, and the terminal performs channel estimation and data demodulation based on the reference signal corresponding to this antenna port.

[0158] 7. Reference Signal

[0159] A reference signal, also known as a pilot signal, is a known signal that can be provided by the transmitter to the receiver. Because information may change during transmission (due to noise, fading, etc.), the received information may differ from the transmitted information. To accurately reconstruct the correct information, it is necessary to understand what changes the information has undergone during transmission; therefore, a reference signal (RS) is introduced.

[0160] The transmitting and receiving ends agree on a known signal (denoted as RS) beforehand. RS is transmitted along with the information to be sent in the transmission channel. After receiving the signal (denoted as RS'), the receiving end compares the differences between RS and RS' to understand the changes that have occurred in the information in the transmission channel, performs channel characteristic estimation, and obtains the channel characteristic H. Based on the channel characteristic H, the received information can be restored to the correct transmitted information.

[0161] Reference signals can be used for channel estimation, channel detection, or target sensing. Based on the transmission direction, reference signals can be divided into uplink reference signals and downlink reference signals.

[0162] Uplink reference signals refer to signals sent from the terminal to the RAN node. Examples include DMRS or sounding reference signals (SRS). Uplink reference signals can be used for uplink channel estimation (e.g., for coherent demodulation and detection in the RAN node or for precoding calculation), uplink channel quality measurement, or target sensing. Downlink reference signals refer to signals sent from the RAN node to the terminal. Examples include DMRS, channel state information reference signals (CSI-RS), or tracking reference signals (TRS). Downlink reference signals can be used for downlink channel estimation, downlink channel measurement, or target sensing.

[0163] It is understood that the reference signal mentioned in this application can be any of the above-mentioned reference signals, that is, the method provided in this application can be applied to any of the above-mentioned reference signals. In order to better understand the method provided in this application, the following embodiments of this application will be described using DMRS as an example. The relevant concepts of DMRS will be briefly described below.

[0164] When considering spatial division multiplexing (SDM), multiple data streams are transmitted simultaneously. These streams occupy the same time-frequency resources but different spatial resources. Spatial resources are divided into "layers," with each layer corresponding to one data stream and mapped to a logical "antenna port." Each antenna port corresponds to a time-frequency resource grid and a corresponding DMRS. The time-frequency resource grid simultaneously carries the DMRS and service data, enabling the receiver to perform channel estimation and coherent demodulation of the service data. To ensure the quality of channel estimation, the DMRSs on different antenna ports are orthogonal in the frequency or code domain.

[0165] In the time domain, DMRS can occupy one or two symbols, so DMRS can be divided into single-symbol DMRS and dual-symbol DMRS. In the frequency domain, based on the maximum number of supported antenna ports, DMRS can be divided into Type 1 and Type 2. For Type 1, DMRS is distributed in a comb pattern in the frequency domain, and the DMRS ports can be divided into two code division multiplexing (CDM) groups, with CDM multiplexing used between ports within each group. For example, a single-symbol DMRS supports a maximum of 4 antenna ports, divided into two CDM groups: {1000, 1001} and {1002, 1003}; a dual-symbol DMRS supports a maximum of 8 antenna ports, divided into two CDM groups: {1000, 1001, 1004, 1005} and {1002, 1003, 1006, 1007}.

[0166] For example, Figure 1D This illustrates the time-frequency resources occupied by a dual-symbol DMRS Type 1. In the time direction, under a regular cyclic prefix, one slot contains 14 symbols (e.g., symbols 0 to 13). In the frequency direction, one RB contains 12 subcarriers (e.g., subcarriers 0 to 11). One resource element (RE) corresponds to one symbol in the time direction and one subcarrier in the frequency direction. Figure 1D In this configuration, one antenna port has six REs within one RB for transmitting DMRS. Within the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with even-numbered indices, such as subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8, and subcarrier 10, while the second CDM group occupies subcarriers with odd-numbered indices, such as subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9, and subcarrier 11. Figure 1D In the symbol 0 and symbol 1, PDCCH can be represented by symbols 4 to 13, respectively.

[0167] Compared to Type 1, Type 2 reduces the frequency domain density of DMRS. In this case, one antenna port has four REs within one RB for DMRS transmission. For Type 2, DMRS ports can be divided into three CDM groups, with code division multiplexing used between ports within each group. For example, a single-symbol DMRS supports a maximum of six antenna ports, divided into three CDM groups: {1000, 1001}, {1002, 1003}, and {1004, 1005}. A dual-symbol DMRS supports a maximum of twelve antenna ports, divided into three CDM groups: {1000, 1001, 1006, 1007}, {1002, 1003, 1008, 1009}, and {1004, 1005, 1010, 1011}.

[0168] For example, Figure 1E The time-frequency resources occupied by dual-symbol DMRS Type 2 are shown. Within the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with indices 0, 1, 6, and 7, the second CDM group occupies subcarriers with indices 2, 3, 8, and 9, and the third CDM group occupies subcarriers with indices 4, 5, 10, and 11. Figure 1E In the symbol 0 and symbol 1, PDCCH can be represented by symbols 4 to 13, respectively.

[0169] As can be seen from the above introduction, for a single CDM group or a single port, whether it is Type 1 or Type 2, it occupies a portion of the subcarriers within a RB. Figure 1D For example, port 1000 occupies subcarrier indices 0, 2, 4, 6, 8, and 10. To describe whether a subcarrier in an RB that does not carry DMRS is idle or carries data (e.g., whether it carries the physical downlink shared channel (PDSCH)), the communication system defines the parameter "number of DMRS CDM groups without data". The functional description of subcarriers within an RB under different numbers of DMRS CDM groups without data is shown in Table 1.

[0170] Table 1

[0171]

[0172] In a communication system, if a subcarrier is vacant, the power allocated to the vacant subcarrier can be superimposed on the DMRS sequence. For example, for type 1, port 1000, the subcarriers occupied are indices 0, 2, 4, 6, 8, and 10, meaning these subcarriers carry DMRS sequences. If the number of DMRS CDM groups without data is 2, the power superposition method is to increase the DMRS sequence power by 1 time (or 3 dB), which is beneficial for improving channel estimation performance.

[0173] In addition, the communication system defines the concepts of DMRS energy per resource element (EPRE), PDSCH EPRE, and physical uplink shared channel (PUSCH) EPRE, and gives the ratio of PDSCH / PUSCH EPRE to DMRS EPRE. This ratio is related to the number of DMRS CDM groups without data, as shown in Table 2.

[0174] Table 2

[0175]

[0176] If the resource patterns occupied by DMRS and PDSCH are as followsFigure 1F As shown, PDSCH EPRE is the same as DMRS EPRE, therefore their ratio is 1, or 0dB. If the resource patterns occupied by DMRS and PDSCH are as follows... Figure 1G As shown, PDSCH EPRE is 0.5 times DMRS EPRE, so the ratio of the two is 0.5, or -3dB.

[0177] In some embodiments, such as in NR, PUSCH supports two waveforms: OFDM waveforms and DFT-s-OFDM waveforms. PDSCH supports OFDM waveforms but not DFT-s-OFDM waveforms. Table 3 schematically illustrates the relationship between the number of DMRS CDM groups without data and the waveforms for different DMRS types.

[0178] Table 3

[0179]

[0180] As can be seen from Table 3, when using OFDM waveforms, frequency division multiplexing (FDM) of DMRS sequences and data is allowed, while when using DFT-s-OFDM waveforms, FDM of DMRS sequences and data is not allowed.

[0181] This indicates that in NR, when using OFDM waveforms, the DMRS sequence is a QPSK symbol sequence. Additionally, when PUSCH uses DFT-s-OFDM waveforms, the DMRS sequence is generated based on the base sequence and supports type 1 DMRS. In some embodiments, when the data uses... When the modulation and the length of the base sequence is greater than or equal to 30, the base sequence is obtained by modulating... The sequence is obtained by performing a DFT.

[0182] Because related techniques do not allow DMRS symbols to carry data when using DFT-s-OFDM waveforms, this approach results in low spectral efficiency. Therefore, a method is proposed where DMRS symbols carry single-carrier data, with the single-carrier data and DMRS sequence frequency-division multiplexed.

[0183] like Figure 1HAs shown, frequency division multiplexing is allowed for the reference sequence and data modulated using a single carrier. For example, the subcarrier carries the DFT or DFT spread result of the pi / 2-BPSK / QPSK / QAM symbol sequence. Optionally, the DMRS sequence can also be replaced with other low PAPR sequences besides QPSK symbol sequences, such as the Zadoff-Chu (ZC) sequence. Some specific implementations of this concept are described below.

[0184] Assume that pilots are uniformly interspersed in the frequency domain resources at a density (or overhead) of 1 / Δ, meaning there is one pilot every (Δ-1) subcarriers. Single-carrier data is placed on the remaining subcarriers. For DMRS type 1, pilots are uniformly interspersed in the frequency domain resources at a density of 1 / 2, meaning there is one pilot every 1 subcarrier, and data is placed in the middle of the pilots. Figure 1I The FDMs with Δ=3 and Δ=4 are schematically shown.

[0185] It should be understood that, given a density of 1 / Δ, pilots can also be placed in the form of pilot blocks. Each pilot block contains... One pilot. The spacing between two adjacent pilot blocks is... For example, DMRS type 2, combined with Figure 1E As can be seen, the DMRS density is 1 / 3, meaning a single port contains two pilot blocks within one RB. Each pilot block contains two pilots. The spacing between the two pilot blocks is 6. For example, DMRS port 1000 occupies subcarriers 0, 1, 6, and 7 of one RB. Subcarriers 0 and 1 constitute pilot block 1, while subcarriers 6 and 7 constitute pilot block 2. It should be understood that uniformly placing pilots is beneficial for obtaining better channel estimation performance, while placing pilots in the form of pilot blocks is beneficial for enhancing multi-user multiplexing capabilities. Assuming that the subcarrier index in the transmission bandwidth starts from 0, the subcarrier index corresponding to the 0th pilot subcarrier is denoted as δ, where δ is a set... Integers in the range. It should be understood that... Figure 1F , Figure 1G and Figure 1I In the scheme shown, δ = 0.

[0186] Figure 1H The use of the illustrated scheme is limited. For example, it is limited from the perspective of PAPR. When a PUSCH contains multiple symbols, in this multi-symbol scenario, the PAPR of the DMRS symbol must not be higher than that of the data symbol (which only carries data, e.g.) Figure 1F or Figure 1GThe PAPR of all symbols except the second one in the DMRS symbol set. If this requirement is not met, the DMRS symbol will have a larger OBO than the data symbol. If this additional OBO loss exceeds the spectral efficiency or capacity gain brought by the DMRS symbol carrying data, the DMRS symbol will not carry data in this case. It should be understood that if the UE supports DMRS symbol PAPR reduction processing, there are more use cases for DMRS symbols carrying data. In addition, the limitation can also be explained from the perspective of UE processing complexity. It should be understood that allowing DMRS symbols to carry data will increase the processing complexity of the UE. For example, the DFT used when processing the data carried in the DMRS symbol is different from the DFT used when processing the data symbol. Therefore, the UE may not support DMRS symbols carrying data due to complexity reasons.

[0187] In summary, while allowing single-carrier data and reference signal frequency division multiplexing is beneficial for improving spectral efficiency, whether a terminal uses this feature depends on the terminal's capabilities.

[0188] Therefore, this application provides a communication method. This application proposes determining whether to perform DMRS sequence and single-carrier data frequency division multiplexing based on the UE's capabilities, or in other words, differentiated application reference signals and single-carrier data FDM based on the UE's capabilities.

[0189] The method provided in this application can be used in various communication systems. For example, the communication system can be a Universal Mobile Telecommunications System (UMTS) system, a Long Term Evolution (LTE) system, a 5th generation (5G) communication system, a Wireless Fidelity (WiFi) system, a 3rd Generation Partnership Project (3GPP) related communication system, a communication system evolved after 5G, or a system integrating multiple systems, etc., without limitation. Among them, 5G can also be called New Radio (NR), and communication systems evolved after 5G or future communication systems, such as the 6th generation mobile communication system. This application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. The following uses… Figure 2The method provided in this application will be described using the communication system 1000 shown as an example. Figure 2 This is merely an illustrative diagram and does not constitute a limitation on the applicable scenarios of the technical solutions provided in this application.

[0190] like Figure 2 The diagram shown is a schematic diagram of the architecture of the communication system 1000 provided in this application. Figure 2 In the communication system 1000, RAN 100 is included. RAN 100 includes at least one RAN node (e.g., Figure 2 110a and 110b (collectively referred to as 110) and at least one terminal (such as Figure 2 RAN 100, denoted as RAN 120a-120j, is collectively referred to as RAN 120. RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 2 (not shown in the image). Terminal 120 is wirelessly connected to RAN node 110.

[0191] RAN 100 can be a 3GPP-related cellular system, such as a 4G, 5G mobile communication system, or a future-oriented evolution system. RAN 100 can also be an open access network (open RAN, O-RAN, or ORAN), a cloud radio access network (CRAN), or a WiFi system. RAN 100 can also be a communication system that integrates two or more of the above systems.

[0192] RAN node 110, sometimes also referred to as access network equipment, RAN entity, network equipment, or access node, constitutes part of the communication system and is used to help terminals achieve wireless access. Multiple RAN nodes 110 in the communication system 1000 can be of the same type or different types.

[0193] In one possible scenario, a RAN node can be a base station. The term "base station" can broadly encompass, or be replaced by, various names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNodeB (MeNB), secondary eNodeB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, radio node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or similar entity, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center and equipment performing base station functions in D2D, V2X, and M2M communications, network-side equipment in 6G networks, or equipment performing base station functions in future communication systems. A base station can support networks using the same or different access technologies. This invention does not limit the specific technology or equipment form adopted by the RAN node.

[0194] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0195] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. Specifically, RAN nodes can be central units (CUs), distributed units (DUs), or radio units (RUs), etc. For example, a CU can perform the functions of the base station's radio resource control (RRC) layer and packet data convergence protocol (PDCP) layer. A CU can also perform the functions of the service data adaptation protocol (SDAP) layer. A DU can perform the functions of the base station's radio link control (RLC) layer and medium access control (MAC) layer. A DU can also perform some or all of the physical layer functions. An RU can be used to implement radio frequency signal transmission and reception. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). The RU can be included in radio frequency equipment or radio frequency units, such as in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radiohead (RRH). Furthermore, the CU can be further divided into the CU-control plane (CP) and the CU-user plane (UP).

[0196] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0197] Terminal 120 is a device with wireless transceiver capabilities. A terminal can also be called a terminal device, which can be user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication equipment, user agent, or user apparatus. A terminal device can be a device that provides voice / data connectivity to a user, such as a handheld device or vehicle-mounted device with wireless connectivity. Currently, examples of terminals include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in autonomous driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks, or future public land mobile communication networks. The embodiments of this application are not limited to terminal devices in a network (PLMN), etc. In vehicle-to-everything (V2X) communication, the communication terminal mounted on the vehicle is a type of terminal device, and the roadside unit (RSU) can also be considered a terminal device. A drone carrying a communication terminal can also be considered a terminal device. A terminal can also be other devices with terminal functions; for example, a terminal can also be a device that performs terminal functions in device-to-device (D2D) communication.

[0198] By way of example and not limitation, in this application, the terminal can be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into a user's clothing or accessories. For example, wearable devices are not merely hardware devices, but also devices that achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include devices that are feature-rich, large in size, and can achieve complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses, as well as devices that focus on only one type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0199] In this application, the terminal can be a terminal in an Internet of Things (IoT) system. IoT is an important component of future information technology development, and its main technical feature is connecting objects to networks through communication technologies, thereby realizing an intelligent network of human-machine interconnection and machine-to-machine interconnection. The terminal in this application can be a terminal in machine-type communication (MTC).

[0200] The terminal in this application can be an on-board module, on-board component, on-board chip, on-board unit (OBU), or telematics box (T-BOX) built into a vehicle as one or more components or units. The vehicle can implement the methods of this application through the built-in on-board module, on-board component, on-board chip, on-board unit, or T-BOX. The terminal can also be a complete vehicle device. Therefore, this application can be applied to vehicle networking, such as V2X, long-term evolution vehicle (LTE-V) communication technology, and vehicle-to-vehicle (V2V) communication.

[0201] RAN nodes and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on aircraft, balloons, and satellites. This invention does not limit the scenario in which the RAN nodes and terminals are located.

[0202] Understandable. Figure 2The communication system 1000 shown is for illustrative purposes only and is not intended to limit the technical solutions of this application. Those skilled in the art should understand that in specific implementations, the communication system 1000 may also include other devices, and the number of RAN nodes and terminals may be determined according to specific needs without limitation.

[0203] The method provided in this application will now be described with reference to the accompanying drawings. It will be understood that in this application, RAN nodes and / or terminals may perform some or all of the steps described herein. These steps are merely examples, and this application may also perform other steps or variations thereof. Furthermore, the steps may be performed in different orders as presented in this application, and it is not necessary to perform all the steps described herein.

[0204] It is understood that the methods described below in this application use RAN nodes and terminals as examples to illustrate the interaction, but this application does not limit the execution entities of the interaction. For example, the RAN node in the methods provided in the embodiments of this application can also be a chip, chip system, or processor that supports the RAN node in implementing the method, or it can be a logical node, logical module, or software that can implement all or part of the RAN node's functions; similarly, the terminal in the methods provided below can also be a chip, chip system, or processor that supports the terminal in implementing the method, or it can be a logical node, logical module, or software that can implement all or part of the terminal's functions.

[0205] like Figure 3 As shown, this application provides a communication method, which may include S301 to S303.

[0206] S301. The terminal sends a first message to the RAN node, and the RAN node receives the first message sent by the terminal accordingly.

[0207] As described above, the first device can send second information to the second device. In this application, the first device can be a terminal, and the second device can be a wireless access device (e.g., a RAN node). Optionally, the first message includes the second information. The second information can be understood with reference to the relevant content above. For example, the second information indicates a first condition, which is related to a first capability. The first capability includes the reference symbol carrying the first data, wherein the first data employs single-carrier modulation.

[0208] As described above, the first device can send third information to the second device. Optionally, the first message includes the third information. The third information can be understood with reference to the relevant content above. For example, the third information indicates the capabilities of the first device, or indicates whether the first device supports pi / 2-binary phase shift keying (BPSK), or indicates whether the first device supports the first processing method.

[0209] As described above, the first device can send a fourth message to the second device. Optionally, the first message includes the fourth message. The fourth message can be understood with reference to the relevant content above. For example, the fourth message indicates whether the first capability is supported or not.

[0210] Optionally, the first message includes at least two of the following: a second message, a third message, or a fourth message.

[0211] This application does not limit the method by which the terminal sends the first message. For example, the terminal may encapsulate the first message in the same data frame. Alternatively, the terminal may encapsulate the first message in multiple data frames, and the second, third, or fourth information may be encapsulated in the same or different data frames.

[0212] S302, the RAN node sends a second message to the terminal, and the terminal receives the second message sent by the RAN node accordingly;

[0213] As described above, the first device receives the first information sent by the second device, and correspondingly, the second device sends the first information back to the first device. The second message may include the first information. The first information can be understood with reference to the relevant content above. For example, the first information indicates that the reference symbol carries first data, or the first information indicates that the reference symbol does not carry first data, wherein the first data is modulated using single-carrier modulation.

[0214] The RAN node can determine the first information based on the first message, and then send the second message. This allows the RAN node to determine whether to allow the reference symbol to carry the first data based on the first message sent by the terminal. Possible implementation methods for the RAN node to determine the first information based on the first message will be described later; they will not be elaborated on here.

[0215] Step S301 is optional. For example, in some examples, the terminal may not send the first message to the RAN node, and correspondingly, the RAN node does not determine the first information based on the first message sent by the terminal. As an example, the RAN node may have a pre-configured first message corresponding to the terminal, and determine the first information based on the pre-saved first message. Alternatively, as an example, the RAN node may obtain the terminal's subscription information from the core network elements, and the terminal's subscription information includes the first message.

[0216] The second message includes the first information; it can be understood that the second message carries the first information. This application does not limit the type of the second message. Optionally, the second message may be Downlink Control Information (DCI), Radio Resource Control (RRC) message, or Media Access Control Unit (MAC-CE) message.

[0217] Optionally, the second message may also include other information. For example, this other information may include scheduling information. The following text will use the example of the second message also including scheduling information.

[0218] This application does not limit the method by which the RAN node sends the second message. For example, the terminal can encapsulate the second message in the same data frame. Alternatively, the terminal can encapsulate the second message in multiple data frames, and the first information and other information can be encapsulated in the same or different data frames.

[0219] S303, The terminal processes the reference symbol and data symbol according to the second message.

[0220] Terminal processing of reference symbols and data symbols may include the terminal sending reference symbols and data symbols, or receiving reference symbols and data symbols.

[0221] Optionally, based on the first information indicating that the reference symbol carries the first data, the reference symbol processed by the terminal according to the second message may carry the first data. Correspondingly, the service data processed by the terminal may include the first data in the reference symbol and the second data in the data symbol. As described above, the second data uses single-carrier modulation. Optionally, based on the first information indicating that the reference symbol does not carry the first data, the reference symbol processed by the terminal according to the second message may not carry the first data. Correspondingly, the service data processed by the terminal may include the second data in the data symbol.

[0222] The terminal can process reference symbols and data symbols on the time-frequency resources scheduled for it by the RAN node. These time-frequency resources can be used for communication between the terminal and the RAN node, or for communication between the terminal and other devices (e.g., other terminals) outside the RAN node.

[0223] Step S303 is optional. This application does not limit the terminal to processing the reference symbol and data symbol according to the second message after receiving the second message. In some examples, the terminal can process the reference symbol according to the second message after receiving the second message. Optionally, based on the first information indicating that the reference symbol carries the first data, the reference symbol processed by the terminal according to the second message can carry the first data. Optionally, based on the first information indicating that the reference symbol does not carry the first data, the reference symbol processed by the terminal according to the second message can not carry the first data.

[0224] The following describes the possible implementation methods for RAN nodes to determine the first information.

[0225] The RAN node can determine the first information based on one or more pieces of information, and then send the second message to the terminal. This one or more pieces of information may include at least one piece of information from the first message, and / or other information besides the first message. For example, the other information may include channel quality. The channel quality may be the quality of a first channel used for transmitting service data.

[0226] In some examples, when a first target condition is met, the first information indicates that the reference symbol carries first data. The first target condition may include at least one of the following: the RAN node receives second information sent by the terminal, and one or more parameters satisfy the first condition indicated by the second information; the RAN node receives third information sent by the terminal, i.e., the terminal supports processing service data in the manner indicated by the third information; the RAN node receives fourth information sent by the terminal, and the fourth information indicates support for a first capability; or, the channel quality satisfies the channel quality condition.

[0227] As described above, the first condition is related to the first capability, which includes the reference symbol carrying the first data. The first condition being related to the first capability can be understood as the satisfaction of the first condition being related to whether the first device supports the first capability, or the satisfaction of the first condition being related to whether the reference symbol carries the first data.

[0228] As mentioned earlier, optionally, one or more parameters include the modulation order of the second data, which can be understood as related to the modulation order of the first capability and the second data. For example, when the modulation order of the second data is greater than the modulation order of a certain modulation scheme (such as 16QAM or higher), the terminal supports the first capability. Optionally, the first condition indicated by the second information includes a modulation order threshold. After the RAN node receives the second information and determines the modulation order threshold indicated by the second information, if the subsequently scheduled PUSCH uses a modulation scheme with a modulation order greater than or exceeding the threshold (such as 16QAM or higher), the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information indicating that the reference symbol carries the first data. If the subsequently scheduled PUSCH uses a modulation scheme with a modulation order lower than the threshold (such as QPSK), the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information indicating that the reference symbol carries the first data.

[0229] As mentioned earlier, optionally, one or more parameters include the MCS of the second data, which can be understood as the first capability being related to the MCS. For example, when the MCS of the second data is greater than a certain threshold (which can be denoted as PuschDmrsFdmThld), the terminal supports the first capability. Optionally, the first condition indicated by the second information includes the MCS threshold. After the RAN node receives the second information and determines the MCS threshold indicated by the second information, if the MCS index used by the subsequently scheduled PUSCH is greater than PuschDmrsFdmThld, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information indicating that the reference symbol carries the first data. If the MCS index used by the subsequently scheduled PUSCH is less than PuschDmrsFdmThld, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information indicating that the reference symbol does not carry the first data.

[0230] The following section describes the effects related to the first capability and the second data modulation order or MCS.

[0231] First, let's analyze this effect from the perspective of demodulation gain. The reference symbol carries the first data, allowing more REs to be used for data transmission, which can reduce the code rate (CR) for a given load (or the amount of information bits to be transmitted). For a given degree of code rate reduction, such as the code rate when using the first capability being 0.9 times that when not using the first capability, the higher the modulation order of the second data or the larger the MCS index, the greater the demodulation gain brought about by the reduction in code rate.

[0232] Considering a transmission bandwidth of 270 RB, the PUSCH includes two symbols: one DMRS symbol (type 1 DMRS) and one data symbol. Table 4 below shows the demodulation signal-to-noise ratio gain (block error rate of 10%, channel tapped delay line-C, delay spread of 220 ns) resulting from using the reference symbol to carry the first data under different MCS indices. See 3GPP TS 38.214 6.1.4.1-1 for the MCS table.

[0233] Table 4

[0234] MCS index Modulation order First capability code rate Signal to noise ratio gain (dB) 0 2 120 / 1024 0.55 3 2 251 / 1024 1 6 2 449 / 1024 1.4 9 2 679 / 1024 2.2 17 6 466 / 1024 4.1 21 6 666 / 1024 4.5 24 6 822 / 1024 5.25 27 6 948 / 1024 6.8

[0235] As can be seen from Table 4, the larger the MCS index value, the greater the gain brought by using the reference symbol to carry the first data.

[0236] Below, we analyze this effect from the perspective of PAPR. Because the lower the modulation order, the lower the PAPR of the data symbols using the DFT-s-OFDM waveform; for example, the PAPR of a 16QAM DFT-s-OFDM signal is worse than that of a QPSK DFT-s-OFDM signal. If the modulation order is lower (or the data symbol PAPR is lower), it becomes more difficult to ensure that the PAPR of the DMRS symbol does not exceed the PAPR of the data symbol, meaning the application scenarios for DMRS symbols carrying the first data are more limited.

[0237] As mentioned earlier, optionally, one or more parameters include the Zadov-Zu ZC sequence root of the reference signal sequence (or RS sequence). This can be understood as the DMRS sequence potentially using a ZC sequence, in which case the first capability is related to the Zadov-Zu ZC sequence root of the reference signal sequence. The following formula gives the M generated based on the ZC sequence in NR. ZC Implementation of long DMRS sequences:

[0238]

[0239] Where, N ZC It is less than M ZC The largest prime number, and q is the root of the ZC sequence, which is related to N. ZC They are coprime, and mod represents the modulo operation, such as 5 mod 2 = 1. The q value can be calculated through some higher-layer parameters. Higher-layer parameters include nPUSCH-Identity, the state of group hopping and sequence hopping ("enabled" or "disabled"), etc.

[0240] Looking at the PAPR of the DMRS sequence alone, or more specifically, the PAPR carrying only the DMRS symbols of the DMRS sequence, it is related to q. Consider M. ZC =72, Figure 4 The PAPR of a single DMRS sequence is given. It can be seen that PAPR varies with the q value.

[0241] Because applying the first capability will worsen the PAPR (PAPR), meaning the PAPR of a DMRS symbol carrying both the DMRS sequence and the first data in FDM mode is worse than the PAPR of a DMRS symbol carrying only the DMRS sequence. Therefore, if the PAPR of a DMRS symbol carrying only the DMRS sequence is already equal to or worse than the PAPR of the data symbol, the first capability cannot be applied; otherwise, the PAPR of the DMRS symbol will be higher than the PAPR of the data symbol.

[0242] One way to determine which q values ​​will produce DMRS sequences with low PAPR is to first calculate Where δ is the integer that minimizes the absolute value of γ. If the absolute value of γ is between threshold 1 and threshold 2 (threshold 2 is greater than threshold 1), then this q value is considered to produce a DMRS sequence with low PAPR. The q values ​​that produce DMRS sequences with low PAPR form a set.

[0243] Therefore, the terminal and / or RAN node can determine whether to apply the first capability based on the q-value. For example, if the value of the Zadov-Zoo ZC sequence root of the reference signal sequence in the second information belongs to the aforementioned set, the terminal supports the first capability. Optionally, the first condition indicated by the second information includes the set of q-values ​​for which the terminal supports the first capability. After the RAN node receives the second information and determines the set of q-values ​​for which the terminal supports the first capability as indicated by the second information, if the q-value used by the subsequently scheduled PUSCH belongs to the set of q-values ​​reported by the terminal, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is used; if the q-value used by the subsequently scheduled PUSCH does not belong to the set of q-values ​​reported by the terminal, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is not used.

[0244] As mentioned earlier, optionally, one or more parameters include the overhead of the reference signal sequence, which can be understood as the first capability being related to the overhead (OH) of the reference signal sequence. The overhead of the reference signal sequence can also be referred to as the density of the reference signal sequence.

[0245] The lower the DMRS density, the more difficult it is to ensure that the PAPR of the DMRS symbol is not higher than that of the data symbol. For example, the DMRS sequence is generated based on the ZC sequence, and q=1, the first data uses a QPSK DFT-s-OFDM waveform, and the transmission bandwidth is 270RB. Figure 5 The PAPR of the DMRS symbol is given when the DMRS overhead is 1 / 2, 1 / 3, 1 / 4, and 1 / 6. It can be seen that the PAPR of the DMRS symbol worsens as the OH decreases.

[0246] Based on this, optionally, the first condition indicated by the second information may include a threshold for the overhead of the reference signal sequence (such as DMRS). After the RAN node receives the second information and determines the threshold for the overhead of the DMRS indicated by the second information, if the overhead of the DMRS in the subsequently scheduled PUSCH is greater than or equal to the threshold value, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability should be used. If the overhead of the DMRS in the subsequently scheduled PUSCH is less than or equal to the threshold value, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability should not be used.

[0247] It should be understood that the reported DMRS overhead threshold may also be related to the modulation order corresponding to the first data. For example, the lower the modulation order corresponding to the first data, the lower the DMRS overhead threshold. For instance, if the modulation order corresponding to the first data is 1, the DMRS overhead threshold may be 1 / 3. If the modulation order corresponding to the first data is 2, the overhead threshold may be 1 / 2.

[0248] As mentioned above, optionally, one or more parameters include the number of reference symbols or the temporal resource overhead of the reference symbols. This can be understood as the first capability being related to the number of reference symbols or the temporal resource overhead of the reference symbols.

[0249] Assuming PUSCH contains a DMRS symbols and b data symbols, then the DMRS symbol overhead is: Assuming we consider Type 1 and the bitrate is c without using the first capability, then the minimum bitrate when using the first capability is... The term "lowest" is used because the modulation order corresponding to the first data may be less than or equal to the modulation order corresponding to the second data.

[0250] analyze As can be seen, it decreases as 'a' increases, meaning that the larger 'a' is, the higher the percentage reduction in bit rate achieved using the first capability. Therefore, the demodulation signal-to-noise ratio gain obtained using the first capability is greater.

[0251] Therefore, when the number of DMRS symbols or the overhead of DMRS symbols exceeds a threshold, the first capability is used. Optionally, the first condition indicated by the second information includes a threshold for the overhead of a reference symbol (e.g., a DMRS symbol). After the RAN node receives the second information and determines the threshold for the overhead of the DMRS symbol indicated by the second information, if the overhead of the DMRS symbol in the subsequently scheduled PUSCH is greater than or equal to the threshold for the reported overhead of the DMRS symbol, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is used. If the overhead of the DMRS symbol in the subsequently scheduled PUSCH is less than or equal to the threshold for the reported overhead of the DMRS symbol, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is not used.

[0252] As mentioned earlier, one or more optional parameters include channel quality, which can be understood as the first capability being related to channel quality. Channel quality can be quantified and described, for example, by the signal-to-interference-plus-noise ratio (SNR) at the receiver. Alternatively, it can be quantified and described by the received power of the reference signal at the receiver. Furthermore, it can be quantified and described by the received quality of the reference signal at the receiver. For instance, a low SNR indicates poor channel quality, while a high SNR indicates good channel quality. If the channel multipath delay spread is large, the channel frequency selectivity is very strong, and the SNR is low. In this case, to ensure the channel estimation quality, the DMRS sequence cannot be FDMed with the first data; instead, the DMRS sequence is power-boosted. The specific power boosting degree is given in Table 2. Correspondingly, the first capability is used when the channel quality meets the channel quality conditions. For example, this channel quality condition can be a threshold for channel quality (such as SNR). If the channel quality of the subsequently scheduled PUSCH meets the channel quality threshold, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources) to the terminal, also sends a first message to the terminal, indicating that the first capability should be used. If the channel quality of the subsequently scheduled PUSCH does not meet the channel quality threshold, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources) to the terminal, also sends a first message to the terminal, indicating that the first capability should not be used.

[0253] As mentioned earlier, the third information indicates the terminal's capabilities. Optionally, the terminal's capabilities include whether the terminal supports a first processing method, where the first processing method is used to reduce the PAPR of the reference symbol. The third information indicating the first processing method can be understood as the first capability being related to the first processing method or the first capability being related to the terminal's ability to reduce PAPR. The first processing method is described below.

[0254] To reduce PAPR, FDM combined with time division multiplexing (TDM) may be used; this scheme will be referred to as the FDM+TDM scheme below. Accordingly, the first processing method can include the FDM+TDM scheme. An FDM+TDM implementation is as follows... Figure 6 As shown. Sequence 1{a k} can be understood as a time-domain DMRS sequence, while sequence 2{b k This can be understood as a time-domain data sequence. Alternatively, sequence 1 can be understood as a time-domain data sequence, and sequence 2 as a time-domain DMRS sequence. From Figure 6 As can be seen, sequence 1 and sequence 2 appear at different times, which is called TDM.

[0255] This section points out that in certain scenarios where DMRS symbols carry the first data, introducing TDM may be a necessary option to ensure that the PAPR of the DMRS symbol is not higher than that of the data symbol. For example, if the data symbol uses a pi / 2-BPSK DFT-s-OFDM waveform, in the case of DMRS sequence and single-carrier data FDM, the following conditions need to be met to ensure that the PAPR of the DMRS symbol is not higher than that of the data symbol: TDM is used, the time-domain DMRS sequence is a pi / 2-BPSK sequence, and the time-domain data sequence is also a pi / 2-BPSK sequence.

[0256] Using TDM shortens the length of the time-domain DMRS sequence compared to FDM. For example, if the transmission bandwidth is x RBs, considering DMRS type 1, the frequency-domain DMRS sequence length would be x / 2 RBs. Using TDM might reduce the time-domain DMRS sequence length to x / 4 RBs (corresponding to...). Figure 6 (The plan), or even lower.

[0257] The following describes the disadvantages of shortening the length of the time-domain DMRS sequence. For example, shortening the length of the time-domain DMRS sequence may worsen the sequence correlation (e.g., cross-correlation), thereby reducing the ability to resist interference (e.g., co-channel interference between different cells). For example, if the time-domain DMRS sequence is a pi / 2-BPSK sequence, shortening the length of the time-domain DMRS sequence will lead to a decrease in the flatness of the frequency-domain DMRS sequence, thus degrading the channel estimation performance.

[0258] Besides shortening the time-domain DMRS sequence length, using TDM also reduces the number of effective symbols carried by the DMRS symbols. For example, still considering DMRS type 1, the number of effective symbols carried corresponds to x / 4 RBs. If x is small, the amount of data carried is also small, and the capacity improvement is not significant, so the first capability will not be used.

[0259] Based on the above two aspects, the transmission bandwidth cannot be too small when adopting the FDM+TDM scheme. Therefore, as mentioned earlier, one or more parameters including the bandwidth for transmitting service data can be understood as the first capability also being related to the transmission bandwidth. For example, when the transmission bandwidth is greater than a threshold (e.g., denoted as TransBWThld), the terminal can support the first capability. Optionally, the first condition indicated by the second information includes TransBWThld. After the RAN node receives the second information and determines the TransBWThld indicated by the second information, if the transmission bandwidth corresponding to the subsequently scheduled PUSCH is greater than or equal to TransBWThld, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is used. If the transmission bandwidth corresponding to the subsequently scheduled PUSCH is less than TransBWThld, the RAN node, in addition to sending PUSCH scheduling information (including time and frequency resources, etc.) to the terminal, also sends the first information to the terminal, indicating that the first capability is not used.

[0260] To reduce PAPR, the terminal may lower the modulation order corresponding to the first data to be lower than the modulation order of the second data in the data symbol, specifically as follows: Figure 7 As shown. Accordingly, the first processing method may include a scheme to reduce the modulation order corresponding to the first data. For example, refer to Figure 7 Data 1 (the first data) uses pi / 2-BPSK modulation, while data 2 (the second data) uses QPSK modulation; or data 1 uses QPSK modulation, while data 2 uses 16QAM. Note that pi / 2-BPSK modulation is not supported by all terminals. Therefore, a terminal can report whether it supports pi / 2-BPSK modulation, or in other words, the terminal's capabilities indicated by the third information can include whether the terminal supports pi / 2-BPSK. If the terminal supports pi / 2-BPSK, then when data 2 uses QPSK modulation, it can use a modulation order reduction scheme corresponding to the first data to reduce the PAPR of the DMRS symbol. If the terminal does not support pi / 2-BPSK, then when data 2 uses QPSK modulation, it cannot use a modulation order reduction scheme corresponding to the first data to reduce the PAPR of the DMRS symbol.

[0261] Because the modulation order of data 1 is lower than that of data 2, the demodulation signal-to-noise ratio (SNR) threshold of data 1 is lower than that of data 2. Therefore, while ensuring that data 1 does not become the bottleneck of demodulation performance, the transmission power of data 1 can be reduced, i.e., the energy per resource unit (EPRE) of data 1 can be reduced. With the total energy of the DMRS symbol (the sum of the energies on all REs) remaining unchanged, while reducing the EPRE of the first data, the EPRE of the DMRS sequence must be increased, i.e., a power boost must be performed on the DMRS sequence.

[0262] The above explains that the first data and the second data in the data symbol of DMRS can use different modulation orders. Furthermore, the data may also use different code rates, meaning that the bits carried by the first data and the bits carried by the second data come from different codewords.

[0263] In summary, based on Figure 7 The PAPR reduction scheme shown requires the terminal to be able to execute two modulation schemes simultaneously. When using two codewords, it is also required to be able to process both codewords simultaneously.

[0264] To reduce PAPR, terminals may also implement other schemes. Terminals and RAN nodes can predefine PAPR reduction schemes, for example, by forming a table (as shown in Table 5), and then report the supported methods as index values. Table 5 schematically illustrates PAPR reduction methods based on predefined index values.

[0265] Table 5

[0266]

[0267] Table 5 lists 10 methods for achieving low PAPR, where the index value can be represented by a 4-bit field. For example, index value 0 corresponds to 0000, while index value 9 is represented by 1001. The first processing method can include at least one of the methods in Table 5.

[0268] In some examples, when the second objective condition is met, the first information indicates that the reference symbol does not carry the first data. The second objective condition may include at least one of the following: the RAN node does not receive the second information sent by the terminal; the RAN node receives the second information sent by the terminal, and all or part of one or more parameters do not meet the first condition indicated by the second information; the RAN node does not receive the third information sent by the terminal; the RAN node receives the third information sent by the terminal, and the terminal does not process service data in the manner indicated by the third information; the RAN node does not receive the fourth information sent by the terminal; the RAN node receives the fourth information sent by the terminal, and the fourth information indicates that the first capability is not supported; or, the channel quality does not meet the channel quality condition.

[0269] In some examples, when a third objective condition is met, the first information indicates that the reference symbol carries the first data. The third objective condition may include at least one of the following: the terminal supports the first capability, or the channel quality meets the channel quality condition.

[0270] In some examples, when the fourth objective condition is met, the first information indicates that the reference symbol does not carry the first data. The fourth objective condition may include at least one of the following: the terminal does not support the first capability, or the channel quality does not meet the channel quality condition.

[0271] This application does not limit the method by which the RAN node determines that the terminal supports the first capability. In some examples, the RAN node determines that the terminal supports the first capability when a fifth objective condition is met. The fifth objective condition may include at least one of the following: the RAN node receives second information sent by the terminal, and one or more parameters satisfy the first condition indicated by the second information; the RAN node receives third information sent by the terminal, and the terminal processes service data in the manner indicated by the third information; the RAN node receives fourth information sent by the terminal, and the fourth information indicates support for the first capability.

[0272] This application does not limit the manner in which the RAN node determines that the terminal does not support the first capability. In some examples, the RAN node determines that the terminal does not support the first capability when a sixth objective condition is met. The sixth objective condition may include at least one of the following: the RAN node does not receive the second information sent by the terminal; the RAN node receives the second information sent by the terminal, and all or part of one or more parameters do not meet the first condition indicated by the second information; the RAN node does not receive the third information sent by the terminal; the RAN node receives the third information sent by the terminal, and the terminal does not process service data in the manner indicated by the third information; the RAN node does not receive the fourth information sent by the terminal; the RAN node receives the fourth information sent by the terminal, and the fourth information indicates that the first capability is not supported.

[0273] It should be understood that in future communication systems, PDSCH may also support low PAPR DFT-s-OFDM waveforms and support DMRS sequences and single-carrier data FDM. Therefore, in the scheme provided in this application, PUSCH can also be replaced with PDSCH.

[0274] The preceding text described the communication apparatus provided in the third aspect of this application. This communication apparatus may include a transceiver unit, and optionally, it may also include a processing unit.

[0275] Optionally, the communication device can be used to perform Figure 3 In the example shown, the steps or processes executed by the terminal can be performed by the transceiver unit, which can be used to execute the sending and / or receiving steps performed by the terminal, and the processing unit can be used to execute the internal operations or actions performed by the terminal. For example, the transceiver unit can be used to execute S301 and S302, and the processing unit can be used to execute S303. For details, please refer to the relevant descriptions in the aforementioned method examples.

[0276] Optionally, the communication device can be used to perform Figure 3 In the example shown, the steps or processes executed by the RAN node can be performed by the transceiver unit, which can be used to execute the sending and / or receiving steps performed by the RAN node, and the processing unit can be used to execute the internal operations or actions performed by the RAN node. For example, the transceiver unit can be used to execute S302 and S301. Please refer to the relevant descriptions in the aforementioned method examples for details.

[0277] In this application, the internal operation or action can be other operations besides the sending and receiving operations in the flowchart of the communication method, such as the steps described within the rectangles of the flowchart.

[0278] The preceding text also described a communication apparatus provided in the fourth aspect of this application. This communication apparatus includes at least one processor, which executes a computer program stored in a memory, causing the processor to perform... Figure 3 The steps performed by the terminal or RAN node in the example shown.

[0279] The preceding text also describes the chip (or chip device or chip system) provided in the fifth aspect of this application, which includes a processor for calling a computer program or computer instructions stored in memory to cause the processor to execute... Figure 3 The steps or procedures performed by the terminal or RAN node in the example shown. Optionally, the processor is coupled to the memory via an interface.

[0280] In this application, the processor mentioned anywhere may be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of a program that controls the methods provided in any of the above embodiments. The memory mentioned anywhere above may be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, such as random access memory (RAM).

[0281] The preceding text also describes a computer-readable storage medium provided in the sixth aspect of this application, the storage medium including computer instructions that, when executed on a computer, cause the computer to perform actions such as Figure 3 The steps or procedures performed by the terminal or RAN node in the example shown.

[0282] The preceding text also described the computer program product including computer instructions provided in the seventh aspect of this application, which, when run on a computer, causes the computer to perform actions such as Figure 3 The steps or procedures performed by the terminal or RAN node in the example shown.

[0283] The preceding text also introduced the communication system provided in the eighth aspect of this application, which includes all or part of the devices shown in the example 3. For example, the communication system is as follows: Figure 2 As shown.

[0284] In this application, the processing unit can be implemented by at least one processor or processor-related circuitry. Specifically, the processor may include a modem chip, or a SoC chip or SIP chip containing a modem core. The transceiver unit can be implemented by a transceiver or transceiver-related circuitry. The transceiver unit may also be referred to as a communication module or communication interface. The storage module can be implemented by at least one memory.

[0285] Optionally, in this application, when the communication device is a circuit or chip responsible for communication functions, such as a modem chip or a SoC chip or SIP chip containing a modem core, the function of the processing unit can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processing cores. The function of the transceiver unit can be implemented by the interface circuit or data transceiver circuit on the aforementioned chip.

[0286] In this application, when the communication device is a terminal, Figure 8 A simplified schematic diagram of a terminal structure is shown. (For example...) Figure 8As shown, the terminal includes a processor, a memory, and a transceiver. The memory can store computer program code, and the transceiver includes a transmitter 831, a receiver 832, radio frequency circuitry (not shown), an antenna 833, and input / output devices (not shown).

[0287] The processor is primarily used for processing communication protocols and data; controlling the terminal; executing software programs; and processing data from those programs. The memory is primarily used for storing software programs and data. The radio frequency (RF) circuitry is primarily used for converting baseband signals to RF signals and processing RF signals. The antenna is primarily used for transmitting and receiving RF signals in the form of electromagnetic waves. Input / output devices may include touchscreens, displays, or keyboards. These devices are primarily used for receiving user input and outputting data to the user. It should be noted that some types of terminals may not have input / output devices.

[0288] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs a baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits it outwards as electromagnetic waves via an antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna. The RF circuit converts the RF signal back into a baseband signal and outputs it to the processor. The processor converts the baseband signal back into data and processes that data. For ease of explanation, Figure 8 Only one memory, processor, and transceiver are shown in the illustration. In actual terminal products, there may be one or more processors and one or more memories. Memory may also be referred to as storage medium or storage device, etc. Memory may be set up independently of the processor or integrated with the processor; this application does not impose any limitations on this.

[0289] In the embodiments of this application, the antenna and radio frequency circuit with transceiver function can be regarded as the transceiver unit of the terminal, and the processor with processing function can be regarded as the processing unit of the terminal.

[0290] like Figure 8 As shown, the terminal includes a processor 810, a memory 820, and a transceiver 830. The processor 810 can also be referred to as a processing unit, processing board, processing unit, or processing device, etc. The transceiver 830 can also be referred to as a transceiver unit, transceiver, or transceiver device, etc.

[0291] Optionally, the devices in transceiver 830 used to implement the receiving and / or transmitting functions can be considered as transceiver units. A transceiver may also be referred to as a transceiver module, transceiver circuit, etc.

[0292] Processor 810 is used to perform the above Figure 3The example shown illustrates the processing actions on the terminal side. Transceiver 830 is used to perform the above. Figure 3 The example shown illustrates the sending and receiving actions of the terminal. It should be understood that... Figure 8 This is merely an example and not a limitation; the terminal described above, which includes a transceiver unit and a processing unit, may not rely on... Figure 8 The structure shown.

[0293] When the communication device 800 is a chip, the chip includes a processor, a memory, and a transceiver. The transceiver can be an input / output circuit or a communication interface. The processor can be a processing unit integrated on the chip, a microprocessor, or an integrated circuit. In the above method embodiments, the terminal's sending operation can be understood as the chip's output, and the terminal's receiving operation in the above method embodiments can be understood as the chip's input.

[0294] In this application, when the communication device is a RAN node, such as a gNB or a base station, Figure 9 A simplified schematic diagram of a base station structure is shown. The base station includes sections 910, 920, and 930.

[0295] The 910 section is mainly used for baseband processing and base station control; the 910 section is usually the control center of the base station, which can be called the processor, and is used to control the base station to perform the processing operations on the access network equipment side in the above method embodiments.

[0296] Section 920 is primarily used to store computer program code and data.

[0297] Section 930 is primarily used for transmitting and receiving radio frequency (RF) signals, as well as converting RF signals to baseband signals. Section 930 is commonly referred to as a transceiver unit, transceiver module, transceiver, transceiver circuit, or transceiver. The transceiver module of section 930, also called a transceiver, includes antenna 933 and RF circuitry (not shown in the figure), where the RF circuitry is mainly used for RF processing. Optionally, the device in section 930 that performs the receiving function can be considered a receiver, and the device that performs the transmitting function can be considered a transmitter; that is, section 930 includes receiver 932 and transmitter 931. The receiver can also be called a receiving unit, receiver circuit, or receiving unit, and the transmitter can be called a transmitting module, transmitter, or transmitting circuit.

[0298] Sections 910 and 920 may include one or more circuit boards, each of which may include one or more processors and one or more memories. The processors are used to read and execute programs from the memories to implement baseband processing functions and control the base station. If multiple circuit boards exist, they can be interconnected to enhance processing capabilities. As an alternative implementation, multiple circuit boards may share one or more processors, multiple circuit boards may share one or more memories, or multiple circuit boards may simultaneously share one or more processors.

[0299] For example, in one implementation, the transceiver module of part 930 is used to perform... Figure 3 The example shown illustrates transmit / receive related processes executed by the RAN node. The processor in section 910 is used to execute these processes. Figure 3 The example shown illustrates the processing-related procedures performed by the RAN node side.

[0300] It should be understood that Figure 9 This is for illustrative purposes only and not as a limitation. The network devices mentioned above, including processors, memory, and transceivers, may be independent of... Figure 9 The structure shown.

[0301] When the communication device 900 is a chip, the chip includes a transceiver, a memory, and a processor. The transceiver can be an input / output circuit or a communication interface; the processor can be a processor integrated on the chip, a microprocessor, or an integrated circuit. In the above method embodiments, the transmitting operation of the RAN node can be understood as the chip's output, and the receiving operation of the RAN node in the above method embodiments can be understood as the chip's input.

[0302] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the explanations and beneficial effects of the relevant contents in any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, and will not be repeated here.

[0303] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0304] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0305] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0306] If the integrated unit is implemented as 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 essential contribution of the technical solution of this application, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0307] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method applied to a first device, characterized in that, include: The device receives first information sent by a second device, wherein the first information indicates that a reference symbol carries first data, or the first information indicates that a reference symbol does not carry first data, wherein the first data is modulated using a single carrier.

2. The method according to claim 1, characterized in that, The reference symbol carrying the first data includes: the reference symbol carrying a reference signal sequence, wherein the reference signal sequence does not overlap with the frequency domain resources occupied by the first data.

3. The method according to claim 1 or 2, characterized in that, Before receiving the first information sent by the second device, the method further includes: Send a second message to the second device, the second message indicating a first condition, the first condition being a condition satisfied by one or more parameters, the one or more parameters being parameters involved in the first device processing service data, the service data including the first data, the first condition being related to a first capability, the first capability including the reference symbol carrying the first data.

4. The method according to claim 3, characterized in that, The one or more parameters include at least one of the following: The modulation order of the second data, the modulation and coding scheme (MCS) of the second data, the Zadov-Zoo ZC sequence root of the reference signal sequence, the overhead of the reference signal sequence, the number of reference symbols, the time-domain resource overhead of the reference symbols, or the bandwidth for transmitting the service data, wherein the service data includes the second data, the second data is modulated using a single carrier, and the second data and the reference symbols occupy different time-domain resources.

5. The method according to any one of claims 1-4, characterized in that, Before receiving the first information sent by the second device, the method further includes: Send a third message to the second device, the third message indicating whether pi / 2-binary phase shift keying (BPSK) is supported and / or indicating a first processing mode, wherein the first processing mode is used to reduce the peak-to-average power ratio (PAPR) of the reference symbol.

6. The method according to any one of claims 1-5, characterized in that, Before receiving the first information sent by the second device, the method further includes: Send a fourth message to the second device, the fourth message indicating whether the first capability is supported or not, the first capability including the reference symbol carrying the first data.

7. The method according to any one of claims 1-6, characterized in that, The reference symbols include demodulation reference signal DMRS, probe reference signal SRS, tracking reference signal TRS, or channel state information reference signal CSI-RS.

8. The method according to any one of claims 1-7, characterized in that, The first information is carried by at least one of the following: Downlink Control Information (DCI), Radio Resource Control (RRC) messages, or Media Access Control Unit (MAC-CE).

9. A communication method applied to a second device, characterized in that, include: Send first information to a first device, wherein the first information indicates that a reference symbol carries first data, or the first information indicates that a reference symbol does not carry first data, wherein the first data is modulated using a single carrier.

10. The method according to claim 9, characterized in that, The reference symbol carrying the first data includes: the reference symbol carrying a reference signal sequence, wherein the reference signal sequence does not overlap with the frequency domain resources occupied by the first data.

11. The method according to claim 9 or 10, characterized in that, Before sending the first information to the first device, the method further includes: The device receives second information sent by the first device, the second information indicating a first condition, the first condition being a condition satisfied by one or more parameters, the one or more parameters being parameters involved in the first device processing service data, the service data including the first data, the first condition being related to a first capability, the first capability including the reference symbol carrying the first data.

12. The method according to claim 11, characterized in that, The one or more parameters include at least one of the following: The modulation order of the second data, the modulation and coding scheme (MCS) of the second data, the Zadov-Zoo ZC sequence root of the reference signal sequence, the overhead of the reference signal sequence, the number of reference symbols, the time-domain resource overhead of the reference symbols, or the bandwidth for transmitting the data, wherein the service data includes the second data, the second data adopts single-carrier modulation, and the second data and the reference symbols occupy different time-domain resources.

13. The method according to any one of claims 9-12, characterized in that, Before sending the first information to the first device, the method further includes: The device receives third information sent by the first device, the third information indicating whether pi / 2-binary phase shift keying (BPSK) is supported and / or indicating a first processing mode, wherein the first processing mode is used to reduce the peak-to-average power ratio (PAPR) of the reference symbol.

14. The method according to any one of claims 9-13, characterized in that, Before sending the first information to the first device, the method further includes: The device receives a fourth message sent by the first device, the fourth message indicating whether the first capability is supported or not, the first capability including the reference symbol carrying the first data.

15. The method according to any one of claims 9-14, characterized in that, The first information is determined based on at least one of the following: Channel quality, the second information, the third information, or the fourth information.

16. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 1 to 15.

17. A communication device, characterized in that, It includes at least one processor, said at least one processor being used to perform the method as described in any one of claims 1 to 15.

18. A chip including a processor for calling a computer program or computer instructions in memory to cause the processor to perform the method as claimed in any one of claims 1 to 15.

19. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed by a communication device, implement the method as described in any one of claims 1 to 15.

20. A computer program product, characterized in that, It includes a computer program or instructions that, when executed by a computer, implement the method as described in any one of claims 1 to 15.

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