Information processing method and apparatus

Abstract

The present application provides an information processing method and apparatus. In the method, a first apparatus obtains a time-domain ZC sequence, the time-domain ZC sequence being used for indicating a reference signal sequence. The time-domain ZC sequence is determined on the basis of a root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is correlated with the length of the reference signal sequence and / or an absolute value of a difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. In other words, in the present application, the ZC sequence is defined in the time domain, the time-domain ZC sequence is determined on the basis of the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is limited, so that the first apparatus can select a root of the time-domain ZC sequence that generates a low PAPR signal, thereby implementing FDM of the reference signal sequence and single carrier data so as to improve spectral efficiency. Further, the first apparatus may also transmit a reference signal (e.g., DMRS) determined on the basis of the reference signal sequence.

Description

An information processing method and apparatus

[0001] This application claims priority to Chinese Patent Application No. 202411470214.5, filed on October 18, 2024, with the invention entitled "An Information Processing Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to an information processing method and apparatus. Background Technology

[0003] Currently, when using orthogonal frequency division multiplexing (OFDM) waveforms, the new radio (NR) allows reference signals and data to share symbols in frequency division multiplexing (FDM) form. This improves spectral efficiency. For example, if the reference signal is a demodulation reference signal (DMRS), for a single DMRS code division multiplexing group (CDM group) or a single DMRS port, it only occupies a portion of the subcarriers within a resource block (RB), and the remaining subcarriers of that RB can be used to carry data, thus enabling DMRS symbols to carry data. Some techniques have proposed allowing reference signals and data to be FDM-based when using discrete Fourier transform spreading OFDM (DFT-s-OFDM) waveforms. In this case, the reference signal can use a low peak-to-average power ratio (PAPR) sequence, such as the Zadoff-Chu (ZC) sequence. However, at certain roots of the ZC sequence, the PAPR of the reference symbol is higher than that of the DFT-s-OFDM data symbol when using both the reference signal and data FDM. Therefore, how to select and restrict the roots of the ZC sequence so that the PAPR of the reference symbol does not exceed that of the DFT-s-OFDM data symbol when using both the reference signal and data FDM becomes a problem to be solved. Summary of the Invention

[0004] In a first aspect, this application provides an information processing method, which can be implemented by a first device, which can be regarded as a transmitting end; for example, the transmitting end can be a network device (such as a base station) or a terminal, or a communication module or component of the network device or terminal, or a logic module or chip that can realize all or part of the functions of the access network device or terminal, etc. The first device acquires a time-domain ZC sequence, which is used to indicate a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The first device transmits a reference signal, which is determined based on the reference signal sequence.

[0005] In this method, defining the ZC sequence in the time domain facilitates the first device in selecting the root of the time-domain ZC sequence that generates the low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirement when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0006] In one possible implementation, the value of the root of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio of the reference signal. The first data employs single-carrier modulation, and the first data and the reference signal occupy different time-domain resources.

[0007] In this embodiment, the first data and the reference signal occupy different time-domain resources, which can mean that the first data and the reference signal are located in different symbols. For example, the first data is located in a data symbol. The first data uses single-carrier modulation, and the PAPR of the symbol carrying the first data is related to the modulation order of the first data. For example, the lower the modulation order of the first data, the lower the PAPR of the symbol carrying the first data. For example, when the modulation order of the first data is Q0, the root value of the time-domain ZC sequence is θ0, which ensures that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data; when the modulation order of the first data is Q1, where Q1 is less than Q0, the root value of the time-domain ZC sequence is still θ0, which may cause the PAPR of the reference signal to be higher than the PAPR of the symbol carrying the first data. In this application, the root value of the time-domain ZC sequence is also related to the modulation order of the first data, thus ensuring that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data.

[0008] Optionally, during PAPR reduction processing without a reference signal, if the root of the time-domain ZC sequence is θ0, the PAPR of the reference signal will not meet the requirements, meaning the root of the time-domain ZC sequence cannot be θ0. After performing a certain PAPR reduction scheme on the reference signal, the PAPR of the reference signal meets the requirements, meaning the root of the time-domain ZC sequence can then be θ0. Therefore, given the PAPR requirement, performing PAPR reduction processing on the reference signal can increase the number of usable roots of the time-domain ZC sequence. Thus, in this embodiment, the value of the root of the time-domain ZC sequence is also related to the PAPR reduction scheme of the reference signal.

[0009] In one possible implementation, when the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. The second data employs single-carrier modulation and is frequency-division multiplexed with the reference signal sequence.

[0010] In this implementation, when the reference signal includes second data, the PAPR of the reference signal is affected by the frequency domain resource overhead corresponding to the reference signal sequence. For example, the lower the frequency domain resource overhead corresponding to the reference signal sequence, the higher the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the frequency domain resource overhead corresponding to the reference signal sequence, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the frequency domain resource overhead corresponding to the reference signal sequence changes.

[0011] In this embodiment, when the reference signal includes second data, a portion or all of the subcarriers in the reference signal other than those occupied by the reference signal sequence are used to carry the second data; that is, the amount of second data carried by the reference signal is variable. For example, the amount of second data affects the PAPR of the reference signal; for example, the larger the amount of second data, the worse the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the amount of second data, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the amount of second data changes.

[0012] In this implementation, the terminal capability can be the power amplifier calibration gap. Supporting this capability allows for a relaxation of the reference signal PAPR requirement. The reference signal PAPR is root-dependent on the time-domain ZC sequence; therefore, the value of the root of the time-domain ZC sequence is related to the terminal capability.

[0013] In one possible implementation, the root of the time-domain ZC sequence is denoted as θ, and the length of the time-domain ZC sequence is denoted as N. zc The length of the reference signal sequence is denoted as M. zc ; where N zc N is a prime number. zc With M zc Related. Among them, the value of the root of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0.

[0014] In one possible implementation, T0 and / or T1 are related to one or more of the following: the length of the reference signal sequence, M zc and N zc The absolute value of the difference between them |M zc -N zc | The modulation order of the first data, the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability.

[0015] In the above embodiments, it is found that the value of the root of the time-domain ZC sequence is related to the threshold value (such as the first threshold value T0 and / or the second threshold value T1). Subsequently, the value of the root of the time-domain ZC sequence can be limited by limiting the threshold value, which helps to reduce the implementation complexity of the first device in selecting the root of the time-domain ZC sequence that meets the requirements of the reference signal PAPR.

[0016] In one possible implementation, the value of θ belongs to the first set {1,2,…,N}. zc When θ = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 includes: θ is greater than T0 and less than or equal to T1; and / or, θ is greater than or equal to N. zc The difference between N and T1, and less than or equal to N.zc The difference between T0 and T0.

[0017] In one possible implementation, the value of θ belongs to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the absolute value of θ is greater than T0 and less than or equal to T1.

[0018] In the above embodiments, the relationship between the value of the root of the time-domain ZC sequence and T0 and / or T1 is defined when the value range of the root θ of the time-domain ZC sequence is different. This helps to reduce the implementation complexity of the first device in selecting the root of the time-domain ZC sequence that satisfies the requirements of the reference signal PAPR.

[0019] In one possible implementation, T0 and M zc and |M zc -N zc |Related;

[0020] Among them, |M zc -N zc When | equals 1, T0 = 0;

[0021] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Less than the length threshold of the reference signal sequence At that time, T0 = 1;

[0022] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Greater than or equal to At that time, T0 = 0;

[0023] Or, |M zc -N zc When the value is greater than the third threshold value G0, T0 = 1 or T0 = 2.

[0024] In one possible implementation, T1 and |M zc -N zc |Related; among which, |M zc -N zc When | is a fixed value, T1 varies with M zc It increases or remains unchanged as the value increases.

[0025] In one possible implementation, T0 and / or T1 are related to the frequency domain resource overhead corresponding to the reference signal sequence. Specifically, when the frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1 and the corresponding T1 is y1; when the frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2 and the corresponding T1 is y2; when c2 is greater than c1, x2 is less than or equal to x1, and y2 is greater than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0026] In one possible implementation, T0 and / or T1 are related to the amount of the second data. Specifically, when the amount of the second data is d1, the corresponding T0 is x1 and the corresponding T1 is y1; when the amount of the second data is d2, the corresponding T0 is x2 and the corresponding T1 is y2; when d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0027] In one possible implementation, T0 and / or T1 are related to termination capabilities. Termination capabilities include power amplifier correction intervals and / or reduction of the peak-to-average power ratio of the reference signal; when termination capabilities are not supported, the corresponding T0 is x3 and the corresponding T1 is y3; when termination capabilities are supported, the corresponding T0 is x4 and the corresponding T1 is y4; wherein x4 is less than or equal to x3, and y4 is greater than or equal to y3.

[0028] In one possible implementation, the reference signal includes one or more of the following: DMRS, sounding reference signal (SRS), or channel state information-reference signal (CSI-RS).

[0029] In one possible implementation, the first device outputs indication information for T0 and / or T1. The indication information for T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, the first index value being associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

[0030] In this embodiment, the first device can determine and output indication information of the threshold value, for example, output one or more sets of threshold values ​​or a first index value. The first index value is associated with a set of threshold values, which helps the second device to determine the root value of the time-domain ZC sequence based on the indication information of the threshold value.

[0031] In one possible implementation, the first device acquires a set of threshold values, including T0 and T1. The first device outputs indication information of the root θ0 of the first time-domain ZC sequence. The value of θ0 satisfies the following condition: the value of θ0 belongs to the first set {1,2,…,N}.zc When -1}, And / or, the value of θ0 belongs to the second set. hour, in, and Another set of threshold values ​​determined for the first device, and

[0032] In this embodiment, the first device can acquire a set of threshold values ​​T0 and T1 reported by the second device, and determine and output the indication information of the root θ0 of the first time-domain ZC sequence based on the set of threshold values, where θ0 corresponds to another set of threshold values. and in

[0033] Secondly, this application provides an information processing method, which can be implemented by a second device, which can be regarded as a receiving end. For example, the receiving end can be a network device (such as a base station) or a terminal, or a communication module or component of the network device or terminal, or a logic module or chip that can realize all or part of the functions of the access network device or terminal. The second device acquires a time-domain ZC sequence, which is used to indicate a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The second device transmits a reference signal, which is determined based on the reference signal sequence.

[0034] In this method, defining the ZC sequence in the time domain facilitates the second device in selecting the root of the time-domain ZC sequence that generates the low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirement when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0035] In one possible implementation, the value of the root of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio of the reference signal. The first data employs single-carrier modulation, and the first data and the reference signal occupy different time-domain resources.

[0036] In this embodiment, the first data and the reference signal occupy different time-domain resources, which can mean that the first data and the reference signal are located in different symbols. For example, the first data is located in a data symbol. The first data uses single-carrier modulation, and the PAPR of the symbol carrying the first data is related to the modulation order of the first data. For example, the lower the modulation order of the first data, the lower the PAPR of the symbol carrying the first data. For example, when the modulation order of the first data is Q0, the root value of the time-domain ZC sequence is θ0, which ensures that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data; when the modulation order of the first data is Q1, where Q1 is less than Q0, the root value of the time-domain ZC sequence is still θ0, which may cause the PAPR of the reference signal to be higher than the PAPR of the symbol carrying the first data. In this application, the root value of the time-domain ZC sequence is also related to the modulation order of the first data, thus ensuring that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data.

[0037] Optionally, during PAPR reduction processing without a reference signal, if the root of the time-domain ZC sequence is θ0, the PAPR of the reference signal will not meet the requirements, meaning the root of the time-domain ZC sequence cannot be θ0. After performing a certain PAPR reduction scheme on the reference signal, the PAPR of the reference signal meets the requirements, meaning the root of the time-domain ZC sequence can then be θ0. Therefore, given the PAPR requirement, performing PAPR reduction processing on the reference signal can increase the number of usable roots of the time-domain ZC sequence. Thus, in this embodiment, the value of the root of the time-domain ZC sequence is also related to the PAPR reduction scheme of the reference signal.

[0038] In one possible implementation, when the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. The second data employs single-carrier modulation and is frequency-division multiplexed with the reference signal sequence.

[0039] In this implementation, when the reference signal includes second data, the PAPR of the reference signal is affected by the frequency domain resource overhead corresponding to the reference signal sequence. For example, the lower the frequency domain resource overhead corresponding to the reference signal sequence, the higher the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the frequency domain resource overhead corresponding to the reference signal sequence, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the frequency domain resource overhead corresponding to the reference signal sequence changes.

[0040] In this embodiment, when the reference signal includes second data, a portion or all of the subcarriers in the reference signal other than those occupied by the reference signal sequence are used to carry the second data; that is, the amount of second data carried by the reference signal is variable. For example, the amount of second data affects the PAPR of the reference signal; the larger the amount of second data, the worse the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the amount of second data, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the amount of second data changes.

[0041] In this implementation, the terminal capability can be the power amplifier correction interval. Supporting this capability allows for a relaxation of the reference signal PAPR requirement. The reference signal PAPR is root-dependent on the time-domain ZC sequence; therefore, the value of the root of the time-domain ZC sequence is related to the terminal capability.

[0042] In one possible implementation, the root of the time-domain ZC sequence is denoted as θ, and the length of the time-domain ZC sequence is denoted as N. zc The length of the reference signal sequence is denoted as M. zc ; where N zc N is a prime number. zc With M zc Related. Among them, the value of the root of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0.

[0043] In one possible implementation, T0 and / or T1 are related to one or more of the following: the length of the reference signal sequence, M zc and N zc The absolute value of the difference between them |M zc -N zc | The modulation order of the first data, the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability.

[0044] In the above embodiments, it is found that the value of the root of the time-domain ZC sequence is related to the threshold value (such as the first threshold value T0 and / or the second threshold value T1). Subsequently, the value of the root of the time-domain ZC sequence can be limited by limiting the threshold value, which helps to reduce the implementation complexity of the first device in selecting the root of the time-domain ZC sequence that meets the requirements of the reference signal PAPR.

[0045] In one possible implementation, the value of θ belongs to the first set {1,2,…,N}. zc When θ = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 includes: θ is greater than T0 and less than or equal to T1; and / or, θ is greater than or equal to N. zc The difference between N and T1, and less than or equal to N. zc The difference between T0 and T0.

[0046] In one possible implementation, the value of θ belongs to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the absolute value of θ is greater than T0 and less than or equal to T1.

[0047] In the above embodiments, the relationship between the value of the root of the time-domain ZC sequence and T0 and / or T1 is defined when the value range of the root θ of the time-domain ZC sequence is different. This helps to reduce the implementation complexity of the first device in selecting the root of the time-domain ZC sequence that satisfies the requirements of the reference signal PAPR.

[0048] In one possible implementation, T0 and M zc and |M zc -N zc |Related;

[0049] Among them, |M zc -N zc When | equals 1, T0 = 0;

[0050] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Less than the length threshold of the reference signal sequence At that time, T0 = 1;

[0051] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Greater than or equal to At that time, T0 = 0;

[0052] Or, |M zc -N zc When the value is greater than the third threshold value G0, T0 = 1 or T0 = 2.

[0053] In one possible implementation, T1 and |M zc -N zc |Related; among which, |M zc -N zc When | is a fixed value, T1 varies with M zc It increases or remains unchanged as the value increases.

[0054] In one possible implementation, T0 and / or T1 are related to the frequency domain resource overhead corresponding to the reference signal sequence. Specifically, when the frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1 and the corresponding T1 is y1; when the frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2 and the corresponding T1 is y2; when c2 is greater than c1, x2 is less than or equal to x1, and y2 is greater than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0055] In one possible implementation, T0 and / or T1 are related to the amount of the second data. Specifically, when the amount of the second data is d1, the corresponding T0 is x1 and the corresponding T1 is y1; when the amount of the second data is d2, the corresponding T0 is x2 and the corresponding T1 is y2; when d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0056] In one possible implementation, T0 and / or T1 are related to termination capabilities. Termination capabilities include power amplifier correction intervals and / or reduction of the peak-to-average power ratio of the reference signal; when termination capabilities are not supported, the corresponding T0 is x3 and the corresponding T1 is y3; when termination capabilities are supported, the corresponding T0 is x4 and the corresponding T1 is y4; wherein x4 is less than or equal to x3, and y4 is greater than or equal to y3.

[0057] In one possible implementation, the reference signal includes one or more of the following: DMRS, SRS, or CSI-RS.

[0058] In one possible implementation, the second device acquires indication information for T0 and / or T1. The indication information for T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, the first index value being associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

[0059] In this embodiment, the second device can acquire threshold indication information, which helps the second device determine the root value of the time-domain ZC sequence based on the threshold indication information.

[0060] In one possible implementation, the second device outputs a set of threshold values, including T0 and T1. The second device acquires indication information of the root θ0 of the first time-domain ZC sequence. The value of θ0 satisfies the following condition: the value of θ0 belongs to the first set {1,2,…,N}. zc When -1}, T0<θ0≤T1, N zc -T1≤θ0 <N zc -T0; and / or, the value of θ0 belongs to the second set. When T0 < |θ0| ≤ T1.

[0061] In this embodiment, the second device can report a set of threshold values ​​T0 and T1, which helps the first device determine and output the indication information of the root θ0 of the time-domain ZC sequence based on the reported set of threshold values ​​T0 and T1. θ0 corresponds to another set of threshold values. and in

[0062] Thirdly, this application provides an information processing apparatus. This information processing apparatus can be considered a transmitting end; for example, the transmitting end can be a network device (such as a base station) or a terminal, or a communication module or component of the network device or terminal, or a logic module or chip capable of realizing all or part of the functions of an access network device or terminal. In one possible implementation, the information processing apparatus has the functions to implement the first aspect and any possible implementation thereof. For example, the information processing apparatus includes modules, units, or means corresponding to the operations involved in the first aspect. These modules, units, or means can be implemented through software, hardware, or a combination of software and hardware.

[0063] In one possible implementation, the information processing apparatus includes a communication unit and a processing unit. The processing unit acquires a time-domain ZC sequence, which is used to indicate a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The communication unit transmits a reference signal, which is determined based on the reference signal sequence.

[0064] In this embodiment, the information processing device can define the ZC sequence in the time domain, which facilitates the first device in selecting the root of the time-domain ZC sequence that generates a low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirement when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0065] Optionally, other possible implementations in the third aspect can be referred to the descriptions of other possible implementations in the first aspect, which will not be repeated here.

[0066] Fourthly, this application provides an information processing apparatus. This information processing apparatus can be considered a receiving end; for example, the receiving end can be a network device (such as a base station) or a terminal, or a communication module or component of the network device or terminal, or a logic module or chip capable of realizing all or part of the functions of an access network device or terminal. In one possible implementation, the information processing apparatus has the functions to implement the second aspect and any possible implementation of the second aspect. For example, the information processing apparatus includes modules, units, or means corresponding to the operations involved in the second aspect. These modules, units, or means can be implemented through software, hardware, or a combination of software and hardware.

[0067] In one possible implementation, the information processing apparatus includes a communication unit and a processing unit. The communication unit acquires a time-domain ZC sequence, which indicates a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The communication unit transmits a reference signal, which is determined based on the reference signal sequence.

[0068] In this embodiment, the information processing device can define the ZC sequence in the time domain, which facilitates the first device in selecting the root of the time-domain ZC sequence that generates a low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirement when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0069] Optionally, other possible implementations of the fourth aspect can be referred to the descriptions of other possible implementations of the second aspect, which will not be repeated here.

[0070] Fifthly, this application provides an information processing apparatus comprising a memory and one or more processors. The memory stores part or all of the necessary computer program or instructions for implementing the functions involved in one or more of the first and / or second aspects described above. The one or more processors are executable to carry out the computer program or instructions, which, when executed, cause the information processing apparatus to implement one or more of the following: the methods of the first aspect and any possible implementation of the first aspect, and the methods of the second aspect and any possible implementation of the second aspect. Optionally, the memory and the processor may be decoupled.

[0071] In one possible design, the information processing device may also include interface circuitry, wherein the processor is used to communicate with other devices or components via the interface circuitry.

[0072] In a sixth aspect, this application provides an information processing apparatus, comprising: one or more processors and an interface circuit, wherein the interface circuit is configured to receive signals from other information processing apparatuses and transmit them to the processor or to send signals from the processor to other information processing apparatuses, and the processor is configured to implement one or more of the following through logic circuits or executing code instructions: the method of the first aspect and any possible implementation of the first aspect, and the method of the second aspect and any possible implementation of the second aspect.

[0073] In a seventh aspect, this application provides a communication system comprising one or more of the means or devices described in the third to sixth aspects, such that the one or more means or devices perform one or more of the following: the method of the first aspect and any possible implementation of the first aspect, and the method of the second aspect and any possible implementation of the second aspect.

[0074] Eighthly, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform one or more of the following: the method of the first aspect and any possible implementation of the first aspect, and the method of the second aspect and any possible implementation of the second aspect.

[0075] Ninthly, this application provides a computer program product including instructions that, when executed on a computer, cause the computer to perform one or more of the following: the method of the first aspect and any possible implementation of the first aspect, and the method of the second aspect and any possible implementation of the second aspect.

[0076] In a tenth aspect, this application provides a chip including one or more processors (or logic circuits). Optionally, the chip may further include one or more communication interfaces (or interfaces) for implementing one or more of the following: the method of the first aspect and any possible implementation of the first aspect, and the method of the second aspect and any possible implementation of the second aspect.

[0077] In one possible implementation, if the chip is the smallest processing unit in the whole machine, the chip may be one or more processors, or may include one or more processors and one or more memories, or may include one or more processors, one or more memories and one or more transceivers, for implementing one or more of the following: the method of the first aspect and any possible implementation of the first aspect, the method of the second aspect and any possible implementation of the second aspect.

[0078] Eleventhly, this application provides a chip system. The chip system includes one or more processors and one or more interfaces. Optionally, it may also include memory for implementing one or more of the following: the methods of the first aspect and any possible implementation of the first aspect, and the methods of the second aspect and any possible implementation of the second aspect. The chip system may be composed of chips or may include chips and other discrete devices. Attached Figure Description

[0079] Figure 1 is a schematic diagram of a possible, non-limiting system;

[0080] Figures 2A to 2C are schematic diagrams of possible implementation scenarios for the first and second devices;

[0081] Figure 3 is a flowchart of the generation and demodulation of NR OFDM symbols;

[0082] Figures 4A and 4B are schematic diagrams of DMRS Type 1;

[0083] Figures 4C and 4D are schematic diagrams of DMRS Type 2;

[0084] Figures 5A and 5B are schematic diagrams of the data in the DMRS symbol and the DMRS sequence;

[0085] Figure 6 is a flowchart illustrating an information processing method provided in this application;

[0086] Figure 7 is a flowchart illustrating another information processing method provided in this application;

[0087] Figures 8A to 8E show the lengths of the DMRS sequences provided in this application, respectively (M). zc =36, M zc =48, Mzc =60, M zc =144, M zc A schematic diagram of the PAPR of the DMRS symbol when =540;

[0088] Figures 9A to 9C show the lengths of the DMRS sequences provided in this application, respectively (M). zc =48, M zc =160, M zc A schematic diagram of the PAPR of the DMRS symbol when =1620;

[0089] Figure 10 is a schematic diagram of PAPR of frequency division data under different DMRS overhead OH provided in this application;

[0090] Figure 11 is a schematic diagram of reducing the modulation order of frequency division data and / or reducing the energy per resource unit;

[0091] Figure 12 is a schematic diagram of reducing the modulation order of frequency division data and / or reducing the energy per resource unit to reduce the PAPR of DMRS symbols;

[0092] Figure 13 is a schematic diagram of an information processing device provided in this application;

[0093] Figure 14 is a schematic diagram of another information processing device provided in this application. Detailed Implementation

[0094] To make the objectives, technical solutions, and advantages of this application clearer, a further detailed description of this application will be provided below with reference to the accompanying drawings. The specific operating methods and functional descriptions in the method embodiments can also be applied to the device embodiments or system embodiments.

[0095] The embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), 5G systems, or New Radio (NR) systems, or to future communication systems or other similar communication systems, or Ultra Wide Band (UWB) systems, or Wireless Fidelity (WiFi) systems.

[0096] Figure 1 illustrates a possible, non-limiting system diagram. As shown in Figure 1, the communication system 1000 includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include an Internet 300. The wireless access network 100 may include at least one wireless access network device (as shown in Figure 1, 110a and 110b) and at least one terminal (as shown in Figure 1, 120a-120j). The terminal connects wirelessly to the wireless access network device, and the wireless access network device connects wirelessly or via a wired connection to the core network. The core network device and the wireless access network device can be independent physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated into the same physical device, or a single physical device can integrate some of the functions of the core network device and some of the functions of the wireless access network device. Terminals and wireless access network devices can be interconnected via wired or wireless connections. Optionally, Figure 1 is only a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1.

[0097] Radio access network equipment can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. Radio access network equipment can also be an open RAN (O-RAN or ORAN) or a cloud radio access network (CRAN). Radio access network equipment can also be a communication system integrating two or more of the above systems. Radio access network equipment can be a macro base station (as shown in Figure 1, 110a), a micro base station or an indoor station (as shown in Figure 1, 110b), a relay node, or a donor node, etc.

[0098] Furthermore, the wireless access network equipment can also be a module or unit that performs some of the functions of a base station. For example, it can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. 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.

[0099] The embodiments of this application do not limit the specific technology or device form used in the wireless access network equipment. For ease of description, a base station is used as an example of a wireless access network equipment in the following description. It is understood that a base station can be referred to as a communication device. For example, a base station can be understood as a device with base station functions. For example, the device used to implement the functions of a base station can be a base station; or some components in a base station, such as CU, DU, etc. It can also be a device that can support the base station in implementing this function, such as a chip system, hardware circuit, software module, or hardware circuit plus software module, which can be installed in a base station or can be used in conjunction with a base station. In the embodiments of this application, the chip system can be composed of chips or can include chips and other discrete devices.

[0100] A terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0101] The embodiments of this application do not limit the specific technology or device form used in the terminal. It is understood that a terminal can be referred to as a communication device. For example, a terminal can be understood as a device with terminal functions. For example, the device used to implement the terminal functions can be a terminal itself; it can also be a device capable of supporting the terminal in implementing those functions, such as a chip system, hardware circuit, software module, or hardware circuit plus software module. This device can be installed in the terminal or can be used in conjunction with the terminal.

[0102] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0103] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For terminals 120j that access the wireless access network 100 through 120i, drone 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.

[0104] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0105] Unless otherwise specified in this document, the term "first device" and "second device" are used as the main entities for description.

[0106] The term "first device" can be understood as a terminal, a device with terminal functions, or a device that implements terminal functions. For example, the first device is a terminal, or the first device can be a module (e.g., a chip or circuit) within a terminal. Alternatively, "first device" can be understood as a base station, a device with base station functions, or a device that implements base station functions. For example, the first device is a base station, or the first device can be a module (e.g., a chip or circuit) within a base station, or it can be a module or unit (e.g., CU, DU, or RU) that fully or partially implements base station functions, a logic module, or software. Alternatively, "first device" can be understood as a device or apparatus with sensing capabilities, or a device or apparatus capable of performing artificial intelligence tasks. A device with sensing capabilities can also be called a sensing device, and a device capable of performing artificial intelligence tasks can also be called an artificial intelligence task execution device.

[0107] "Second device" can be understood as a terminal, a device with terminal functions, or a device that implements terminal functions. For example, the second device is a terminal, or the second device can be a module (e.g., a chip or circuit) within a terminal. Alternatively, "second device" can be understood as a base station, a device with base station functions, or a device that implements base station functions. For example, the second device is a base station, or the second device can be a module (e.g., a chip or circuit) within a base station, or it can be a module or unit (e.g., CU, DU, or RU) that fully or partially implements base station functions, a logic module, or software. Alternatively, "second device" can be understood as a device or apparatus with sensing capabilities, or a device or apparatus capable of performing artificial intelligence tasks. A device with sensing capabilities can be called a sensing device, and a device capable of performing artificial intelligence tasks can be called an artificial intelligence task execution device.

[0108] Furthermore, the "first device" can be a transmitter or a receiver, and correspondingly, the "second device" can be a receiver or a transmitter. For ease of description, the following explanation will use the "first device" as the transmitter and the "second device" as the receiver as an example.

[0109] In addition, "first device" can be replaced with "first equipment" or "first communication device", and "second device" can be replaced with "second equipment" or "second communication device".

[0110] In some possible implementation scenarios, the "first device" can be a "terminal," and the "second device" can be a "base station." Alternatively, the "first device" can be a "base station," and the "second device" can be a "terminal." For example, in Figure 2A, one or more terminals can communicate with the base station separately. The interface between the terminal and the base station is a Uu interface.

[0111] In some possible implementation scenarios, the "first device" can be a "first terminal," and the "second device" can be a "second terminal." For example, in Figure 2B, terminal 1 can communicate with terminal 3, and terminal 2 can communicate with terminal 3. Terminal 3 and terminal 1 can communicate via a sidelink, and similarly, terminal 3 and terminal 2 can communicate via a sidelink. Furthermore, if terminal 3 receives data from terminal 1 and terminal 2, it can also transmit the received data from terminal 1 and terminal 2, along with its own data (i.e., terminal 3's data), to the base station. In this case, terminal 3 can also be understood as a relay terminal. The interface between terminal 3 and the base station is a Uu interface.

[0112] In some possible implementation scenarios, the "first device" can be a "first base station," and the "second device" can be a "second base station." For example, in Figure 2C, base station 1 and base station 2 can communicate. The interface between base station 1 and base station 2 can be an X2 interface.

[0113] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, and "send information" can include direct transmission or indirect transmission through other units or modules. "Receive information from YY" can be understood as the source of the information being YY, and "receive information" can include direct reception from YY or indirect reception from YY through other units or modules. Furthermore, "send" can also be understood as the "output" of a chip interface, and "receive" can be understood as the "input" of a chip interface. In other words, "send" or "receive" can occur between devices, such as a base station and a terminal transmitting or receiving data via an air interface. "Send" or "receive" can also occur within a device, such as transmitting or receiving data between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.

[0114] Orthogonal Frequency Division Multiplexing (OFDM): For example, Figure 3 shows a flowchart of the generation and demodulation of NR OFDM symbols. Here, the signal {S(p)} is a frequency domain signal. The serial-to-parallel (S / P) module converts M consecutive data points S(kM), S(kM+1), ..., S(kM+M-1) into an M-dimensional data block S. k =[S(kM),S(kM+1),…,S(kM+M-1)] T Where the subscript k represents the OFDM symbol number and the superscript T represents transpose. Through subcarrier mapping, S k The M data carried modulate N subcarriers. sc N subcarriers, of which N sc =M, the rest (NN) sc The N subcarriers can be understood as being modulated by data 0. The N-dimensional data vector X k A set of N complex time-domain sampling points x is obtained by performing an N-point inverse discrete Fourier transform (IDFT). k =[x k (0),x k (1),…,x k (N-1)] T Among them, x k (n), n=0,1,…,N-1 can be expressed as formula (1):

[0115] Among them, X k (n′), n′=0,1,…,N-1 represents the output of the subcarrier mapping module, e represents the Euler constant, j represents the imaginary unit, j 2 =-1.

[0116] A subcarrier mapping rule can be expressed as formula (2):

[0117] Where offset n0 is an integer, S k (l) represents S k The l-th element, l = 0, 1, ..., N sc -1.

[0118] The next important step in generating OFDM symbols is adding a cyclic prefix (CP). This is specifically implemented by copying x. k The last G samples are appended to x. k At the beginning, thus obtaining the time-domain OFDM symbol. Therefore, an OFDM symbol contains valid data x kAnd cyclic prefix (redundant data). Among them, CP can eliminate inter-symbol interference (ISI) caused by multipath propagation (the propagation phenomenon of radio signals reaching the receiver through two or more paths).

[0119] At the receiver, OFDM symbols are demodulated through inverse processing. Assuming time and frequency synchronization are available and the CP length is sufficient, the CP removal operation (i.e., removing the first G samples from the received signal) yields a data block with N samples without ISI. This data block with N samples without ISI is also equal to x. k Circular convolution with the channel impulse response. The time-domain circular convolution can be converted into frequency-domain dot product using the discrete Fourier transform (DFT), and then low-complexity channel equalization can be achieved using frequency-domain single-tap equalization.

[0120] S k This may include modulation symbols and / or redundant signal sampling points. Modulation symbols can be obtained by modulating the (coded) bit stream. Modulation schemes may include pulse amplitude modulation (PAM), phase shift keying (PSK), quadrature amplitude modulation (QAM), amplitude phase shift keying (APSK), etc.

[0121] Redundant signal sampling points can include phase tracking reference signal (PTRS) sampling points, demodulation reference signals, tone-preserving signals, etc.

[0122] Optionally, when the number of transform points N satisfies certain constraints, such as N being a power of 2, 3, or 5, IDFT can also be implemented using the efficient inverse fast fourier transform (IFFT). Correspondingly, DFT can also be implemented using the efficient FFT. In the following text, IDFT and IFFT are interchangeable, as are DFT and fast fourier transform (FFT).

[0123] N sc This can be understood as the number of subcarriers within the transmission bandwidth, for example, N. sc =M. Optional, N sc It can also be greater than M; for example, it can be greater than M for S. kPerform sequence expansion, assuming the length of the expanded sequence is equal to N. sc Therefore, N sc ≥M.

[0124] Discrete Fourier transform spreading OFDM (DFT-s-OFDM): As shown in Figure 3, DFT-s-OFDM defines the data block s transmitted in the time domain. k There is an additional DFT process before the OFDM process, that is, for each data block containing M data, s k Perform an M-point DFT operation to obtain S k This operation gives DFT-s-OFDM signals the characteristics of a single carrier, resulting in a significantly lower peak-to-average power ratio (PAPR) than multi-carrier signals like OFDM. Therefore, with the same power amplifier, DFT-s-OFDM can provide greater output power and higher amplifier efficiency, thereby improving coverage and reducing power consumption. The coverage and power consumption advantages of DFT-s-OFDM are particularly evident on the terminal device side; therefore, in current versions of LTE and NR, DFT-s-OFDM can be used for uplink transmission.

[0125] s k This can include modulation symbols and / or redundant signal sampling points. The modulation symbols can be obtained by modulating the (coded) bitstream. Modulation schemes can include PAM, PSK, QAM, offset quadrature amplitude modulation (OQAM), APSK, etc. Redundant signal sampling points can include PTRS sampling points, unique words, zeros, etc.

[0126] Bit mapping schemes: For example, bit mapping schemes include binary phase shift keying (BPSK). Quadrature phase shift keying (QPSK) and quadrature amplitude modulation (QAM) are examples. QPSK can also be called 4QAM. Taking the BPSK modulation mapper as an example, it maps the i-th bit b(i) to the i-th BPSK symbol d(i) according to formula (3):

[0127] by Taking the modulation mapper as an example, it maps the i-th bit b(i) to the i-th bit according to formula (4). Symbol d(i):

[0128] Based on formula (4), it can be derived that two adjacent symbols in a symbol sequence The symbol only has a 90-degree phase transition.

[0129] Taking the QPSK modulation mapper as an example, it maps two consecutive bits to a QPSK symbol, as shown in formula (5):

[0130] Where b(2i) and b(2i+1) represent the 2i-th and 2i+1-th bits respectively, and d(i) represents the i-th QPSK symbol.

[0131] Taking a 16QAM modulation mapper as an example, it maps four consecutive bits to a 16QAM symbol, as shown in formula (6):

[0132] Where b(4i), b(4i+1), b(4i+2) and b(4i+3) represent the 4i, 4i+1, 4i+2 and 4i+3 bits respectively, and d(i) represents the i-th 16QAM symbol.

[0133] Optionally, in future communication systems, Bit mapping schemes such as QSPK and QAM may be implemented in other ways, and this application does not limit them.

[0134] Peak-to-average power ratio (PAPR): This is the ratio of peak power to average power. For a signal x(t), its peak power over a certain time interval (e.g., from t0 to t1) is... And the average power is PAPR can be expressed as formula (7):

[0135] Communication signals (such as OFDM, DFT-s-OFDM signals, etc.) are random signals. Their mean power can be regarded as a fixed value, and their peak power is a random variable; therefore, PAPR 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; for example, in communication, the complementary cumulative distribution function (CCDF) curve can be used to describe PAPR; where the probability that the instantaneous power exceeds the mean power xx dB is yy, or the proportion of the time when the instantaneous power exceeds the mean power xx dB to the total time is yy, as shown in formula (8):

[0136] Where P(·) represents probability.

[0137] DMRS: Information is sent from the transmitter, transmitted through a channel, and received at the receiver. Because the information may change during transmission (e.g., due to noise or fading), the received information may differ from the transmitted information. To accurately reconstruct the correct information, it's necessary to understand the changes the information underwent during transmission; therefore, a reference signal (RS) is introduced. For example, the transmitter and receiver pre-agree on a known signal (RS). RS is transmitted along with the information to be sent through the channel. After receiving the received signal (e.g., RS'), the receiver compares the differences between RS and RS' to understand the changes that occurred in the information during transmission, performs channel characteristic estimation, and obtains the channel characteristic H. Furthermore, based on the channel characteristic H, the received information can be reconstructed as the correct transmitted information.

[0138] In one possible implementation, the demodulation reference signal (DMRS) is used for channel estimation during demodulation. The time-frequency resources of the DMRS symbols include the following cases:

[0139] (1) Time domain resources: Based on the number of symbols occupied by DMRS, it is divided into two types: single-symbol DMRS and double-symbol DMRS.

[0140] (2) Frequency domain resources: According to the different maximum number of antenna ports supported, the DMRS configuration methods can be divided into the following two categories: DMRS configuration type 1 (or simply type 1) and DMRS configuration type 2 (or simply type 2).

[0141] In the DMRS configuration type 1, the frequency domain is distributed in a comb-like pattern, divided into two code division multiplexing (CDM) groups, with CDM multiplexing used between ports within each group. For example, Type 1 single-symbol DMRS supports a maximum of 4 antenna ports, divided into two CDM groups: {1000, 1001} and {1002, 1003}, as shown in Figure 4A. Another example is Type 1 dual-symbol DMRS, which supports a maximum of 8 antenna ports, divided into two CDM groups: {1000, 1001, 1004, 1005} and {1002, 1003, 1006, 1007}, as shown in Figure 4B. As shown in Figures 4A and 4B, in Type 1, in the time direction, under normal CP, one slot contains 14 symbols, corresponding to indices 0-13. In the frequency domain, one RB contains 12 subcarriers, corresponding to indices 0-11. One resource element (RE) corresponds to one symbol in the time domain and one subcarrier in the frequency domain. One antenna port has six REs within one resource block (RB) for transmitting pilot signals. It can be understood that "pilot" here can refer to "DMRS". Within the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with even-numbered indices, i.e., subcarrier indices 0, 2, 4, 6, 8, 10. The second CDM group occupies subcarriers with odd-numbered indices, i.e., subcarrier indices 1, 3, 5, 7, 9, 11.

[0142] In Type 2 DMRS configuration, there are three CDM groups, with code division multiplexing used between ports within each group. Compared to Type 1, Type 2 reduces the frequency domain density of the DMRS. For example, one antenna port has four REs within one RB for pilot transmission. Similarly, Type 2 is also divided into single-symbol and dual-symbol DMRS. For example, Type 2 single-symbol DMRS supports a maximum of 6 antenna ports, divided into three CDM groups: {1000, 1001}, {1002, 1003}, and {1004, 1005}, as shown in Figure 4C. As another example, Type 2 dual-symbol DMRS supports a maximum of 12 antenna ports, divided into three CDM groups: {1000, 1001, 1006, 1007}, {1002, 1003, 1008, 1009}, and {1004, 1005, 1010, 1011}, as shown in Figure 4D. As shown in Figures 4C and 4D, in Type 2, under normal CP conditions, one slot contains 14 symbols in the time direction, corresponding to indices 0-13. In the frequency domain, one RB contains 12 subcarriers, corresponding to indices 0-11. One RE corresponds to one symbol in the time direction and one subcarrier in the frequency domain. One antenna port has 4 REs within one RB for pilot transmission. It can be understood that "pilot" here can be "DMRS". 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.

[0143] Understandably, in NR systems, DMRS signals can be categorized into front-loaded DMRS and rear-loaded DMRS based on their location. Rear-loaded DMRS can also be called additional DMRS. Front-loaded DMRS is mandatory, while rear-loaded DMRS is optional. Rear-loaded DMRS is generally used in medium- to high-speed mobile scenarios. By inserting more DMRS symbols into the physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH), the estimation accuracy of time-varying channels is improved. A maximum of three additional DMRS can be configured within a single PDSCH / PUSCH.

[0144] The DMRS time-domain structure for Mapping Type A (or type A) is as follows: the first DMRS symbol is located in symbol #2 or symbol #3 within the time slot. Mapping Type A is mainly used in scenarios where data transmission occupies the majority of symbols in the time slot.

[0145] The DMRS time-domain structure of Mapping Type B (or type B) is as follows: the first DMRS symbol is fixedly mapped to the first OFDM symbol of the PDSCH / PUSCH. Mapping Type B is mainly used in scenarios where the PDSCH / PUSCH occupies only a small portion of the symbols in a time slot, in order to reduce transmission latency.

[0146] The NR defines the concept of "number of DMRS CDM groups without data". Based on the number of DMRS CDM groups without data and the antenna port number, it can be determined whether the remaining subcarriers of a RB (which do not carry DMRS sequences) carry data or are empty. For example, Table 1 shows how to determine whether a DMRS symbol carries data and how it carries data based on the number of DMRS CDM groups without data and the antenna port number.

[0147] Table 1: Table for determining whether DMRS symbols carry data and the method of carrying data based on the number of DMRS CDM groups without data and the antenna port number.

[0148] For example, referring to Figure 5A, assuming the dispatch terminal uses antenna port 1000, which belongs to CDM group 0, the RE in CDM group 1 (i.e., subcarriers 1 / 3 / 5 / 7 / 9 / 11) can carry data. As another example, referring to Figure 5B, assuming the antenna port used by the dispatch terminal does not belong to CDM group 0, then the RE in CDM group 1 cannot carry data (i.e., subcarriers 1 / 3 / 5 / 7 / 9 / 11 are empty REs).

[0149] Optionally, if a subcarrier is vacant, the power allocated to the vacant subcarrier is superimposed on the DMRS sequence. For example, for type 1, port 1000 occupies subcarriers 0, 2, 4, 6, 8, and 10, which carry the DMRS sequence, and the number of DMRS CDM groups without data is 2. In this case, the power superposition method increases the DMRS sequence power by 1 time (or 3 dB), which is beneficial for improving channel estimation performance and data symbol demodulation performance.

[0150] For ease of understanding, the first data described in this application represents non-frequency-division data, and the second data represents frequency-division data. Frequency-division data refers to the data in the DMRS symbol, which is associated with the DMRS sequence (FDM). Non-frequency-division data refers to the data in the data symbol. For example, as shown in Figure 5A, the DMRS symbol includes a symbol with index 2 and 12 REs on subcarriers with indices 0-11. The DMRS sequence is mapped to the symbol with index 2 and the REs on subcarrier indices 0, 2, 4, 6, 8, and 10. The data in the DMRS symbol is mapped to the symbol with index 2 and the REs on subcarrier indices 1, 3, 5, 7, 9, and 11. It can be seen that the data in the DMRS symbol is associated with the DMRS sequence (FDM). The data in the data symbol is mapped to the REs with symbol indices 0-1 and 3-13, and subcarrier indices 0-11.

[0151] In NR, PUSCH supports two waveforms: OFDM and DFT-s-OFDM. PDSCH only supports OFDM. When using OFDM, DMRS sequences and data FDM are allowed, while when using DFT-s-OFDM, neither DMRS sequences nor data FDM are allowed. Some technologies propose allowing DMRS sequences and data FDM when using DFT-s-OFDM in future communication systems. Furthermore, to reduce the PAPR of DMRS symbols, in one possible implementation, the DMRS sequence is generated based on a ZC sequence, which is determined based on the root of the ZC sequence. However, under certain ZC sequence roots, the PAPR of the DMRS symbol may be higher than that of the data symbol. Therefore, how to select and restrict the roots of the ZC sequence so that the corresponding reference signal sequence and single-carrier data can be FDM becomes a problem to be solved.

[0152] This application provides an information processing method and apparatus. This method facilitates the selection of the root of a time-domain ZC sequence that generates a low PAPR signal, thereby realizing FDM of a reference signal sequence and single-carrier data. Furthermore, the ZC selection process for the time-domain ZC sequence is more intuitive and involves lower complexity.

[0153] For example, Figure 6 is a flowchart illustrating an information processing method provided in this application, which is implemented through interaction between a first device and a second device. The method includes the following steps:

[0154] S101, the first device acquires the time-domain ZC sequence.

[0155] For example, S101 could specifically be that the first device determines the time-domain ZC sequence; or, the first device receives the time-domain ZC sequence. The following description takes the first device as the transmitter (that is, the first device determines the time-domain ZC sequence) and the second device as the receiver as an example.

[0156] In one possible implementation, the time-domain ZC sequence is used to indicate the reference signal sequence. The generation method of the time-domain ZC sequence is described below. For example, the time-domain ZC sequence can be defined by formula (9) or formula (10):

[0157] Where θ represents the root of the time-domain ZC sequence, N zc This represents the length of the time-domain ZC sequence, θ and N. zc Coprime, N zc It is a prime number. Comparing formulas (9) and (10), we can see that the difference lies in the exponent; formula (9) uses -1j, while formula (10) uses 1j. This difference does not change the properties of the ZC sequence, therefore both formulas are applicable to this application.

[0158] Generate N zc Long time-domain ZC sequence {x θ After (n)}, N can be used zc Point DFT yields N zc A long frequency domain sequence {X(n)}. Utilizing the properties of ZC sequences, {X(n)} is also a ZC sequence. For example, assuming the time-domain ZC sequence is defined by formula (9), then the corresponding X(n) is defined by formula (11):

[0159] in, And the integer ε1 satisfies θε1 mod N zc =1, that is, the product of θ and ε1, θε1, divided by N. zc The remainder is 1. For example, assuming the time-domain ZC sequence is defined by formula (10), then the corresponding X(n) is defined by formula (12):

[0160] in, And the integer ε2 satisfies θε2 mod N zc =N zc -1, that is, the product of θ and ε2, θε2, divided by N zc The remainder is -1 or N zc -1.

[0161] Optionally, the method for obtaining {X(n)} is not limited to {x} θTo perform a DFT on {X(n)}, you can first determine ε1 or ε2, and then obtain {X(n)} based on formula (11) or formula (12).

[0162] After obtaining {X(n)}, if N zc The length M of the DMRS sequence is less than zc For example, N zc It is less than M zc The largest prime number can be obtained by cyclic expansion M. zc Long DMRS sequences. Or, if N zc Greater than M zc For example, N zc It is greater than M zc The smallest prime number can be obtained by truncating M. zc A long DMRS sequence. Optionally, since {X(n)} is a constant modulus sequence, the DMRS sequence obtained by cyclically expanding or truncating {X(n)} will be constant modulus, which helps to ensure that the DMRS sequence does not introduce noise amplification and degrade the channel estimation performance during channel estimation.

[0163] Therefore, in conjunction with the above description, this application can determine the reference signal sequence based on the time-domain ZC sequence, that is, the time-domain ZC sequence is used to generate the reference signal sequence.

[0164] In one possible implementation, the root of the time-domain ZC sequence is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. For example, based on formula (9) and / or formula (10), θ represents the root of the time-domain ZC sequence, and θ is related to N. zc Coprime. This application imposes restrictions on θ, which is beneficial for the selection of θ to be used for reference signal sequences and single-carrier data frequency division multiplexing (FDM).

[0165] In one possible implementation, it is assumed that the range of values ​​for θ is {1,2,…,N}. zc -1}, for example, suppose N zc =71, then the range of θ is {1,2,…,N}. zc -1} corresponds to the set {1,2,…,70}. Furthermore, this application also limits the value of the root θ of the time-domain ZC sequence to the length M of the reference signal sequence. zc and / or the length M of the reference signal sequence zc The length N of the time-domain ZC sequence zc The absolute value of the difference between them |M zc -N zc |Related. For example, suppose |M zc -N zc |=1 and M zcWhen θ = 160, simulation analysis shows that the values ​​of θ used for the reference signal sequence and single-carrier data FDM satisfy a condition greater than 0 and less than or equal to 12, i.e., 0 < θ ≤ 12. In this example, the upper and lower limits of the value of θ are based on |M zc -N zc |and M zc Certainly. For example, suppose |M zc -N zc When | = 5, simulation analysis shows that PAPR is lower when θ is between 2 and 4 or between 27 and 29, making FDM feasible. In this example, the upper and lower limits of θ are based on |M zc -N zc | Definitely. For example, suppose M... zc When θ = 540, simulation analysis shows that PAPR is lower when θ is between 3 and 80 or between 450 and 520, making FDM feasible. In this example, the upper and lower limits of θ are based on M. zc It is certain. The conditions for the simulation analysis include: assuming that the range of values ​​for θ is {1,2,…,N}. zc -1}, while N zc It is less than M zc The largest prime number, M zc The possible values ​​include M zc =160, M zc =540, and the simulation results include the corresponding PAPR.

[0166] In one possible implementation, the root value of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio (PAPR) of the reference signal. The first data uses single-carrier modulation, and the first data and the reference signal occupy different time-domain resources. This can mean that the first data and the reference signal are located in different symbols. For example, the first data may be located in a data symbol. The PAPR of the symbol carrying the first data is related to the modulation order of the first data. For example, the lower the modulation order of the first data, the lower the PAPR of the symbol carrying the first data. For instance, when the modulation order of the first data is Q0, a root value of θ0 in the time-domain ZC sequence can ensure that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data; when the modulation order of the first data is Q1, where Q1 is less than Q0, a root value of θ0 in the time-domain ZC sequence may result in a PAPR of the reference signal being higher than the PAPR of the symbol carrying the first data. In this application, the value of the root of the time-domain ZC sequence is also related to the modulation order of the first data, thus ensuring that the PAPR of the reference signal is not higher than the PAPR of the symbol carrying the first data. For example, based on the above description, the modulation order of the first data is the modulation order of the data carried in the data symbol. like The data carried in the data symbol is modulated using pi / 2-BPSK; if The data carried in the data symbols is QPSK modulated; therefore, the root value of the time-domain ZC sequence is related to the modulation order of the first data. For example, a way to reduce the peak-to-average power ratio of the reference signal is to reduce the modulation order of the frequency-division data. For instance, suppose the frequency-division data is denoted as Data 1, and the data carried by the data symbols is denoted as Data 2. Reducing the modulation order of the frequency-division data can be achieved by setting the modulation order of Data 2 to 2 (i.e., Data 2 uses QPSK modulation) and the modulation order of Data 1 to 1 (i.e., Data 1 uses pi / 2-BPSK modulation); or by setting the modulation order of Data 2 to 4 (i.e., Data 2 uses 16QAM) and the modulation order of Data 1 to 2 (i.e., Data 1 uses QPSK modulation). Since 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. This makes it easier for the PAPR of symbols carrying frequency-division data to be lower than that of symbols carrying non-frequency-division data.

[0167] Optionally, if the peak-to-average power ratio (PAPR) of the reference signal is not reduced, and the value θ0 of the root of the time-domain ZC sequence makes the PAPR of the reference signal not meet the requirements, then the value of the root of the time-domain ZC sequence cannot be θ0. If the value θ0 of the root of the time-domain ZC sequence obtained after reducing the PAPR of the reference signal makes the PAPR of the reference signal meet the requirements, then the value of the root of the time-domain ZC sequence can be θ0. Therefore, given the PAPR requirement, reducing the PAPR of the reference signal can increase the number of usable roots of the time-domain ZC sequence; that is, the value of the root of the time-domain ZC sequence is also related to the scheme for reducing the PAPR of the reference signal.

[0168] It is understandable that the above-mentioned schemes of adjusting the modulation order of the first data and reducing the peak-to-average power ratio of the reference signal can be implemented simultaneously, thereby further optimizing communication.

[0169] In one possible implementation, when the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. The second data employs single-carrier modulation, and the second data and the reference signal sequence are frequency-division multiplexed (FDM).

[0170] In this implementation, when the reference signal includes second data, the PAPR of the reference signal is affected by the frequency domain resource overhead corresponding to the reference signal sequence. For example, the lower the frequency domain resource overhead corresponding to the reference signal sequence, the higher the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the frequency domain resource overhead corresponding to the reference signal sequence, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the frequency domain resource overhead corresponding to the reference signal sequence changes.

[0171] In this embodiment, when the reference signal includes second data, a portion or all of the subcarriers in the reference signal other than those occupied by the reference signal sequence are used to carry the second data; that is, the amount of second data carried by the reference signal is variable. For example, the amount of second data affects the PAPR of the reference signal; the larger the amount of second data, the worse the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the amount of second data, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the amount of second data changes. Optionally, the amount of second data may be related to channel quality and interference between terminals. For example, when the channel quality is poor, to ensure channel estimation performance, the reference signal may not carry second data to improve the power of the reference signal sequence.

[0172] In this implementation, the terminal capability can be the power amplifier correction interval. Supporting this capability allows for a relaxation of the reference signal PAPR requirement. The reference signal PAPR is root-dependent on the time-domain ZC sequence; therefore, the value of the root of the time-domain ZC sequence is related to the terminal capability.

[0173] S102, the first device transmits a reference signal.

[0174] For example, S102 can specifically be: the first device sends or transmits a reference signal, and correspondingly, the second device receives or acquires the reference signal; or, the second device sends or transmits a reference signal, and correspondingly, the first device receives or acquires the reference signal. The following description uses the first device as the transmitting end and the second device as the receiving end as an example.

[0175] In one possible implementation, the first device sends or transmits a reference signal, for example, the first device sends or transmits a DMRS to the second device. This DMRS is determined based on a DMRS sequence, which is obtained by cyclically expanding or truncating {X(n)} as described in S101. Correspondingly, after receiving or acquiring the DMRS, the second device can perform channel estimation.

[0176] In this embodiment, defining the ZC sequence in the time domain facilitates the first device in selecting the root of the time-domain ZC sequence that generates the low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirements when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes.

[0177] For example, Figure 7 is a flowchart illustrating another information processing method provided in this application. This process can be implemented through interaction between a first device and a second device. Compared to the embodiment in Figure 6, this embodiment introduces the definition of a threshold value, which is used to limit the value of the root θ of the time-domain ZC sequence. The method includes the following steps:

[0178] S201, the first device acquires the time-domain ZC sequence.

[0179] In one possible implementation, the time-domain ZC sequence is used to indicate the reference signal sequence. For example, the time-domain ZC sequence can be defined by formula (9) or formula (10), and based on the time-domain ZC sequence, related processing can be performed to finally determine the DMRS sequence. For specific implementation details, please refer to the description in S101, which will not be repeated here.

[0180] In one possible implementation, the root of the time-domain ZC sequence is denoted as θ, and the length of the time-domain ZC sequence is denoted as N. zc The length of the reference signal sequence is denoted as M. zc ; where N zc N is a prime number. zc With M zc Related. The root value of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0. For example, this embodiment introduces the first threshold value T0 and / or the second threshold value T1, and the value of θ can be restricted based on T0 and / or T1.

[0181] In one possible implementation, the value of θ belongs to the first set {1,2,…,N}. zc When θ = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 includes: θ is greater than T0 and less than or equal to T1; and / or, θ is greater than or equal to N. zc The difference between N and T1, and less than or equal to N. zc The difference between θ and T0. For example, the values ​​of θ belong to the first set {1,2,…,N}. zc When T = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 can be expressed as formula (13):

[0182] Where T0≥0, and T1≥T0. It can be seen that formula (13) not only defines the restrictions on the value of θ when the reference signal sequence and single-carrier data are FDMed, but also defines the restrictions on the value of θ when the reference signal sequence and single-carrier data are not FDMed.

[0183] In one possible implementation, the value of θ belongs to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the absolute value of θ is greater than T0 and less than or equal to T1; where, This indicates rounding down. For example, the values ​​of θ belong to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the relationship can be expressed as formula (14):

[0184] Where T0≥0, and T1≥T0. It can be seen that formula (14) not only defines the restrictions on the value of θ when the reference signal sequence and single-carrier data are FDMed, but also defines the restrictions on the value of θ when the reference signal sequence and single-carrier data are not FDMed.

[0185] In one possible implementation, a mapping relationship exists between the first set and the second set. For example, the second set... It can be derived from the first set {1,2,…,N} zc -1} is obtained by mapping. Specifically, θ satisfies formula (15):

[0186] in, It satisfies formula (16), and round(·) means rounding.

[0187] Where u∈{0,1,…,29}.

[0188] Based on formulas (15) and (16), the set Mapped to a set And sets Mapped to a set Or, set Mapped to a set And sets Mapped to a set For example, a mapping relationship is shown in formula (17):

[0189] In one possible implementation, T0 and / or T1 are related to one or more of the following: the length of the reference signal sequence, M zc and N zc The absolute value of the difference between them |M zc -N zc The modulation order of the first data, the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. For example, the threshold value T (including T0 and / or T1) can be described as a function of at least one of the following factors, as shown in Equation (18):

[0190] Wherein, DMRS OH (DMRS Overhead) represents the frequency domain resource overhead corresponding to the reference signal sequence, PAPR reduce scheme represents the scheme for reducing the peak-to-average power ratio of the reference signal, and others include, but are not limited to, the amount of second data or terminal capability. The following examples illustrate the relationship between the threshold value and the above factors. It is understood that the following examples are described from the perspective of one or two factors, and are merely examples; multiple factors can also be combined, and this application does not limit this.

[0191] Example 1: T0 and M zc and |M zc -N zc |Related.

[0192] For example, suppose the range of values ​​for θ is {1,2,…,N}. zc -1}, while N zc It is less than M zc The largest prime number. Figures 8A to 8E analyze M. zc =36, M zc =48, M zc =60, M zc =144, M zc =540 PAPR of the DMRS symbol. It should be noted that Figures 8A to 8E assume that the DMRS symbol does not carry data, but only the DMRS sequence. Given an M zc By combining θ and θ, a PAPR curve can be obtained. In Figures 8A to 8E, the horizontal axis represents the root θ, and the vertical axis represents the PAPR when CCDF is 0.01.

[0193] For example, in Figure 8A, assume M zc =36, N zc =31, |M zc -N zc| equals 5. It can be seen that PAPR is higher when θ is 1 or 30. Therefore, FDM is not considered when θ is 1 or 30. However, PAPR is lower when θ is 2–4 or 27–29, so FDM can be performed. In summary, in M… zc =36, N zc When T = 31, T0 can take the value 1, while T1 can take the value 4.

[0194] For example, in Figure 8B, assume M zc =48, N zc =47, |M zc -N zc | equals 1. For example, in Figure 8C, assume M... zc =60, N zc =59, |M zc -N zc | is also equal to 1. Based on the analysis of Figures 8B and 8C, it can be seen that the curve has a triangular trend (as shown by the triangular diagonal lines in Figures 8B and 8C). Therefore, for the cases shown in Figures 8B and 8C, T0 = 0.

[0195] For example, in Figure 8D, assume M zc =144, N zc =139, |M zc -N zc | equals 5, the same as in Figure 8A. However, the curve in Figure 8D can also be considered to have a triangular trend. Therefore, for the case shown in Figure 8D, T0 = 0.

[0196] For example, in Figure 8E, assume M zc =540, N zc =523, |M zc -N zc | equals 17 (the difference is relatively large compared to the previous cases). It can be seen that PAPR is higher when θ takes values ​​of 1–2 or 521–522. Therefore, FDM is not considered when θ takes values ​​of 1–2 or 521–522. Therefore, for the case shown in Figure 8E, T0 = 2.

[0197] In summary, T0 and M zc and |M zc -N zc The relevant situations include the following: |M zc -N zc When | equals 1, T0 = 0; or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Less than the length threshold of the reference signal sequence When T0 = 1; or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Greater than or equal to When T0 = 0; or, |M zc -N zc When the value is greater than the third threshold value G0, T0 = 1 or T0 = 2.

[0198] Example 2: T1 and |M zc -N zc |Related.

[0199] For example, suppose |M zc -N zc |=1, and the range of θ is {1,2,…,N}. zc -1}. Figure 9A analyzes M. zc The PAPR of the DMRS symbol at 48 is analyzed in Figure 9B. zc The PAPR of the DMRS symbol at 160 is analyzed in Figure 9C. zc The PAPR of the DMRS symbol when M = 1620. It should be noted that Figures 9A to 9C assume the DMRS symbol does not carry data, only the DMRS sequence. In Figures 9A to 9C, the horizontal axis represents the root θ, and the vertical axis represents the PAPR when CCDF is 0.01. When θ = 1, based on the analysis in Figures 9A to 9C, it can be seen that as M... zc The larger the value, the lower the PAPR. For example, M zc =1620, PAPR is close to 1.5dB@CCDF=0.01. Optionally, assuming a PAPR of less than 3dB is required, then corresponding to the cases shown in Figures 9A to 9C, the threshold T1 can be 3, 12, and 71 respectively, that is, as M... zc It increases as it increases. In summary, |M zc -N zc When | is a fixed value, T1 varies with M zc It increases or remains unchanged as the value increases.

[0200] Example 3: T0 and / or T1 are related to the frequency domain resource overhead DMRSOH corresponding to the reference signal sequence.

[0201] For example, assume that the frequency-division data uses pi / 2-BPSK modulation, while the data symbols use QPSK modulation. Additionally, assume that all REs except the DMRSRE are used to transmit the frequency-division data, with a transmission bandwidth of 270 RBs. Figure 10 shows the PAPR of the frequency-division data under different DMRSOH values; that is, the DMRS symbols shown in Figure 10 do not carry the DMRS sequence, only the data. The DMRSOH values ​​shown in Figure 10 include 1 / 2, 1 / 3, 1 / 4, 1 / 6, 1 / 8, 1 / 12, and 1 / 24. Analysis based on Figure 10 shows that as the DMRSOH decreases, the PAPR of the DMRS symbols deteriorates. When the OH is below 1 / 3, the PAPR of the DMRS symbols is already worse than that of the data symbols. Since the PAPR of the DMRS symbols after FDM of single-carrier data and the DMRS sequence is worse than that of the frequency-division data, it can be concluded from the analysis of Figure 10 that FDM is not performed when the DMRSOH is below 1 / 3. For example, as shown in Figure 10, the difference between the PAPR of the frequency division data and the data symbol is greater than that of the frequency division data when DMRSOH = 1 / 2. Therefore, under the constraint that the PAPR of the DMRS symbol is not higher than that of the data symbol, the root of the time-domain ZC sequence with a worse PAPR can be used when DMRSOH = 1 / 2 than when DMRSOH = 1 / 3. That is, the range of the threshold T0 can be smaller, while the range of the threshold T1 can be larger.

[0202] In summary, the relationship between the frequency domain resource overhead corresponding to the reference signal sequence and T0 and / or T1 can be summarized as follows: when the frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1 and the corresponding T1 is y1; when the frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2 and the corresponding T1 is y2; when c2 is greater than c1, x2 is less than or equal to x1, and y2 is greater than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0203] Example 4: T0 and / or T1 are related to the amount of the second data.

[0204] When the reference signal includes second data, some or all of the subcarriers in the reference signal, excluding those occupied by the reference signal sequence, are used to carry the second data. In other words, the amount of second data carried by the reference signal is variable. For example, the amount of second data affects the PAPR of the reference signal; the larger the amount of second data, the worse the PAPR of the reference signal. Therefore, the value of the root of the time-domain ZC sequence is related to the amount of second data, ensuring that the PAPR of the reference signal still meets the PAPR requirement when the amount of second data changes.

[0205] Optionally, the amount of the second data may be related to channel quality. For example, when the channel quality is less than or equal to a channel quality threshold, such as when the channel multipath delay spread is large and frequency selectivity is severe, FDM is not used to ensure channel estimation performance. In this case, the amount of the second data is 0, meaning the reference symbol does not carry the second data. In this situation, T0 and / or T1 may only be related to the factors mentioned above (including but not limited to M). zc |M zc -N zc | and the modulation order of the first data, etc.

[0206] For example, when the channel quality is greater than the channel quality threshold, FDM can be used, which allows the reference symbol to carry second data. In this case, the amount of the second data is greater than 0, and T0 and / or T1 are also related to the amount of the second data.

[0207] Optionally, the amount of the second data may be related to interference between terminals. For example, suppose two UEs (denoted as UE 1 and UE 2) communicate with the base station. Both UE 1 and UE 2 are configured as DMRS type 1, and UE 1's DMRSRE corresponds to CDM group 0, while UE 2's DMRSRE corresponds to CDM group 1. If UE 1 uses FDM, i.e., UE 1 places frequency-division data at the RE position corresponding to CDM group 1, it will interfere with UE 2's DMRS, resulting in poor channel estimation performance for UE 2. The base station can adjust the amount of the second data for interference management considerations (such as when the interference between UE 1 and UE 2 exceeds the interference threshold). For example, when the interference between terminals exceeds the interference threshold, FDM is not used, and the amount of the second data is 0, i.e., the reference symbol does not carry the second data. In this case, T0 and / or T1 may only be related to the factors mentioned above (including but not limited to M). zc |M zc -N zc | and the modulation order of the first data, etc.

[0208] For example, when the interference between terminals is less than or equal to the interference threshold, FDM can be used, which allows the reference symbol to carry second data. In this case, the amount of the second data is greater than 0, and T0 and / or T1 are also related to the amount of the second data.

[0209] In summary, the relationship between the quantity of the second data and T0 and / or T1 can be summarized as follows: when the quantity of the second data is d1, the corresponding T0 is x1 and the corresponding T1 is y1; when the quantity of the second data is d2, the corresponding T0 is x2 and the corresponding T1 is y2; when d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0210] Example 5: T0 and / or T1 are related to terminal capabilities.

[0211] The termination capability includes power amplifier correction interval and / or reduction of the peak-to-average power ratio of the reference signal. For example, when termination capability is not supported, the corresponding T0 is x3 and the corresponding T1 is y3; when termination capability is supported, the corresponding T0 is x4 and the corresponding T1 is y4; where x4 is less than or equal to x3 and y4 is greater than or equal to y3.

[0212] In one possible implementation, when the terminal capability includes a PAPR scheme for reducing the reference signal, it is assumed that the PAPR scheme includes reducing the modulation order of the frequency-division data and / or reducing the energy per resource unit (EPRE). For example, Figure 11 is a schematic diagram of reducing the modulation order of the frequency-division data and / or reducing the energy per resource unit, where the horizontal direction of Figure 11 is the time direction and the vertical direction is the frequency domain direction. In Figure 11, a total of 5 symbols are given (assuming symbol indices are 0 to 4). It is assumed that symbols 0 and 3 are DMRS symbols, while symbols 1, 2, and 4 are data symbols. The frequency-division data is denoted as Data 1, and the data carried by the data symbols is denoted as Data 2. For example, reducing the modulation order of the frequency-division multiplexing (FDM) data can be achieved by setting the modulation order of Data 2 to 2 (i.e., Data 2 uses QPSK modulation) and the modulation order of Data 1 to 1 (i.e., Data 1 uses pi / 2-BPSK modulation); or by setting the modulation order of Data 2 to 4 (i.e., Data 2 uses 16QAM) and the modulation order of Data 1 to 2 (i.e., Data 1 uses QPSK modulation). Since the modulation order of Data 1 is lower than that of Data 2, the demodulation SNR threshold of Data 1 is lower than that of Data 2. Furthermore, with the same noise figure, Data 1 can be transmitted with a lower transmit power than Data 2, i.e., reducing the EPRE of Data 1. With the total RE energy of the DMRS symbol remaining constant, reducing the FDM data ERPE simultaneously requires increasing the EPRE of the DMRS sequence.

[0213] For example, Figure 12 illustrates a method to reduce the modulation order of frequency-division multiplexing (FDM) data and / or reduce the energy per resource unit (EPR) to lower the PAPR of DMRS symbols. Assume a transmission bandwidth of 270 RB, DMRSOH = 1 / 2, and the root of the time-domain ZC sequence is 809. Data 2 uses QPSK modulation (its corresponding PAPR curve label is "QPSKDFT-s-OFDM"). When Data 1 uses QPSK modulation (its corresponding PAPR curve label is "FDM, QPSK"), as shown in Figure 12, the PAPR of the DMRS symbol exceeds that of the data symbol. When Data 2 uses pi / 2-BPSK modulation (its corresponding PAPR curve label is "FDM, pi / 2-BPSK"), i.e., reducing the modulation order of Data 2, the PAPR is somewhat improved compared to Data 1 using QPSK modulation, but it still exceeds the PAPR of the data symbol. When Data 2 uses pi / 2-BPSK modulation and reduces EPRE by 6dB (its corresponding PAPR curve label is "FDM, pi / 2-BPSK, 6dB EPREreduce"), it can be seen that DMRSPAPR is lower than the PAPR of the data symbol when CCDF is below 0.01. Therefore, referring to Figure 12, it can be deduced that without the DMRSPAPR reduction scheme, FDM cannot be performed when the root of the time-domain ZC sequence is 809. However, with the PAPR reduction technique, FDM can be performed when the root is 809. Thus, reducing the PAPR of the DMRS symbol expands the number of roots of the available time-domain ZC sequence, i.e., reducing T0 and / or increasing T1.

[0214] It should be understood that Pi / 2-BPSK modulation is optional for the UE, meaning some UEs may not support it. Furthermore, if data 2 uses QPSK modulation, and the UE does not support Pi / 2-BPSK modulation, the PAPR of the DMRS symbol cannot be reduced by lowering the modulation order of data 1 to 1. In summary, UE support for Pi / 2-BPSK modulation is also a UE capability. When the UE supports Pi / 2-BPSK modulation, it can expand the number of roots of the available time-domain ZC sequence, i.e., reduce T0 and / or increase T1. In one possible implementation, when the terminal capability includes a calibration gap, assuming the UE supports the calibration gap, the UE can perform some processing within that gap, such as executing a digital predistortion algorithm, to reduce the nonlinear effect of the power amplifier on the signal. Therefore, when the terminal supports the calibration gap, it can tolerate a worse PAPR performance of the power amplifier input signal. In other words, if the UE supports calibration gap, it can allow DMRS symbols to have worse PAPR, which is equivalent to expanding the scope of FDM (e.g., reducing T0 and / or increasing T1) and expanding the number of roots of available time-domain ZC sequences.

[0215] S202a, the first device outputs indication information of the first threshold value T0 and / or the second threshold value T1; correspondingly, the second device acquires the indication information of the first threshold value T0 and / or the second threshold value T1.

[0216] In one possible implementation, T0 and / or T1 can be configured (or determined) by the first device and then indicated to the second device; or T0 and / or T1 can be mutually agreed upon by the first and second devices (for example, the threshold function T shown in formula (18) can be predefined, and both the first and second devices know it). This step is described in the example of T0 and / or T1 being configured and indicated by the first device. For example, T0 and / or T1 can be configured by the first device and then sent to the second device. For example, the first device can output the threshold value in the form of unicast, multicast, or broadcast. The threshold value can include a set of thresholds (T0, T1) or multiple sets of thresholds. That is, the indication information of T0 and / or T1 includes a set of threshold values ​​or multiple sets of threshold values. Optionally, when the first device outputs multiple sets of thresholds, each set of thresholds can correspond to different values ​​of one or more parameters. One or more parameters can include, but are not limited to, M described above. zc DMRS OH, modulation order of non-frequency division data, etc. For example, Table 2 is a table of threshold values.

[0217] Table 2: Threshold Values

[0218] Among them, it is assumed that the thresholds in Table 2 correspond to the following parameters: DMRSOH = 1 / 2, QPSK modulation is used for non-frequency division data, while pi / 2-BPSK modulation is used for frequency division data with a 3dB decrease in EPRE, N zc It is less than M zc The largest prime number. Optionally, Table 2 above is only an example, and the table of threshold values ​​can also be varied based on different parameters corresponding to the threshold. For example, suppose the parameters corresponding to the threshold include: DMRSOH = 1 / 3, QPSK modulation is used for non-frequency division data, while pi / 2-BPSK modulation is used for frequency division data with a 6dB drop in EPRE, N zc It is less than M zc When the maximum prime number is reached, it can be a table of other threshold values, which is not limited in this application.

[0219] In one possible implementation, the indication information for T0 and / or T1 includes a first index value, which is associated with a set of threshold values; the set of threshold values ​​includes T0 and T1. For example, assuming that the table of threshold values ​​shown in Table 2 can be predefined by the first and second devices, the first device only needs to output the first index value, which is associated with a set of threshold values ​​(e.g., index value 1 in Table 2 is associated with a set of threshold values ​​(T0 = 0, T1 = 6)). The second device determines the corresponding threshold value from the predefined table of threshold values ​​based on the first index value. Optionally, the first device may also output multiple parameters, such as output transmission bandwidth, DMRStype (used to determine DMRSOH), coding and modulation scheme of frequency-division and non-frequency-division data (used to determine the modulation order of frequency-division and non-frequency-division data), and EPRE drop value of frequency-division data. Correspondingly, the second device acquires the aforementioned multiple parameters and determines a predefined table and corresponding threshold values ​​based on these parameters. For example, the second device can locate Table 2 based on the coding and modulation schemes of DMRSOH, frequency division and non-frequency division data, and the EPRE drop value of frequency division data, and then determine the threshold values ​​based on the transmission bandwidth. It is understood that the signaling overhead occupied by the indication information of T0 and / or T1 in this embodiment is relatively low.

[0220] Optionally, prior to S202a, the following steps may also be included: the second device outputs indication information of the terminal capability; correspondingly, the first device acquires the indication information of the terminal capability. For example, the UE may report its own capabilities, such as whether it supports a scheme to reduce the peak-to-average power ratio of the reference signal and / or a power amplifier correction interval, thereby assisting the base station in determining a more accurate threshold value.

[0221] S202b, the first device outputs the indication information of the root θ0 of the first time-domain ZC sequence; correspondingly, the second device acquires the indication information of the root θ0 of the first time-domain ZC sequence.

[0222] In one possible implementation, the first device can directly output indication information of the root θ0 of the first time-domain ZC sequence supporting FDM, configured by the first device. Here, the value of θ0 satisfies the following condition: the value of θ0 belongs to the first set {1,2,…,N}. zc When -1}, And / or, the value of θ0 belongs to the second set. hour, in, and Another set of threshold values ​​determined for the first device, and For example, suppose a UE can report a set of threshold values ​​(T0, T1), indicating that the UE needs to perform FDM. The base station determines another set of threshold values ​​based on the threshold values ​​(T0, T1) reported by the UE and information such as channel quality. Threshold That is, the threshold determined by the base station is narrower than the threshold determined by the UE. Then, the base station follows the threshold... A root value θ0 is determined that allows for FDM, and an indication of θ0 is sent to the UE (e.g., the value of θ0 is sent directly, or the index value of θ0 is sent). It is understandable that, due to... Then θ0 must satisfy the threshold value (T0, T1), which ensures that the UE can use the θ0 value to perform FDM.

[0223] Optionally, before S202a or S202b, the following steps are further included: the second device outputs a set of threshold values; correspondingly, the first device acquires a set of threshold values. The set of threshold values ​​includes a first threshold value T0 and / or a second threshold value T1. For example, the UE can report a set of threshold values ​​(T0, T1) indicating that the UE needs to perform FDM.

[0224] Optionally, the signaling output involved in the above steps may be downlink control information (DCI), radio resource control (RRC), or medium access control-control element (MAC-CE), etc., which are not limited in this application.

[0225] Optionally, S202a or S202b are two parallel options, and only one step needs to be executed; for example, if S202a is executed, S202b is not executed, or if S202b is executed, S202a is not executed.

[0226] S203, the first device transmits a reference signal.

[0227] For example, S203 could specifically be: the first device sends or transmits a reference signal, and correspondingly, the second device receives or acquires the reference signal; or, the second device sends or transmits a reference signal, and correspondingly, the first device receives or acquires the reference signal. The following description uses the first device as the transmitting end and the second device as the receiving end as an example.

[0228] In one possible implementation, the first device sends or transmits a reference signal, for example, sending or transmitting a DMRS to the second device. This DMRS carries a DMRS sequence, which is obtained by cyclically expanding or truncating {X(n)} as described in S101. Correspondingly, after receiving or acquiring the DMRS, the second device can perform channel estimation.

[0229] This embodiment introduces a threshold value definition to limit the value of the root θ of the time-domain ZC sequence. It also details the relationship between the threshold value and multiple factors, achieving refined threshold design. Furthermore, the ZC selection process for the time-domain ZC sequence is more intuitive and involves lower complexity. This embodiment also introduces threshold value indication, threshold value reporting, and terminal capability reporting processes, which facilitates dynamic switching of FDM and supports differentiated FDM application based on UE capabilities.

[0230] It is understood that, in order to achieve the functions described in the above embodiments of the device, the base station and the terminal include hardware structures and / or software modules corresponding to perform each function. Those skilled in the art should readily recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0231] Figures 13 and 14 are schematic diagrams of the information processing apparatus provided in this application. These information processing apparatuses can be used to implement the functions of the first or second apparatus in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0232] As shown in Figure 13, the information processing device 1300 includes a processing unit 1310 and a transceiver unit 1320. The information processing device 1300 is used to implement the functions of the first or second device in the method embodiments shown in Figures 6 and 7. Optionally, the transceiver unit 1320 includes a sending unit and a receiving unit, and the transceiver unit 1320 can also be referred to as a communication unit.

[0233] When the information processing device 1300 is used to implement the function of the first device in the method embodiments shown in Figures 6 and 7: the processing unit 1310 is used to acquire a time-domain ZC sequence, which is used to indicate a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The transceiver unit 1320 is used to transmit a reference signal, which is determined based on a reference signal sequence.

[0234] In one possible implementation, the value of the root of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio of the reference signal. The first data employs single-carrier modulation, and the first data and the reference signal occupy different time-domain resources.

[0235] In one possible implementation, when the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. The second data employs single-carrier modulation and is frequency-division multiplexed with the reference signal sequence.

[0236] In one possible implementation, the root of the time-domain ZC sequence is denoted as θ, and the length of the time-domain ZC sequence is denoted as N. zc The length of the reference signal sequence is denoted as M. zc ; where N zc N is a prime number. zc With M zc Related. Among them, the value of the root of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0.

[0237] In one possible implementation, T0 and / or T1 are related to one or more of the following: the length of the reference signal sequence, M zc and N zc The absolute value of the difference between them |M zc -N zc | The modulation order of the first data, the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability.

[0238] In one possible implementation, the value of θ belongs to the first set {1,2,…,N}. zc When θ = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 includes: θ is greater than T0 and less than or equal to T1; and / or, θ is greater than or equal to N. zc The difference between N and T1, and less than or equal to N. zc The difference between T0 and T0.

[0239] In one possible implementation, the value of θ belongs to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the absolute value of θ is greater than T0 and less than or equal to T1.

[0240] In one possible implementation, T0 and M zc and |M zc -N zc |Related;

[0241] Among them, |M zc -N zc When | equals 1, T0 = 0;

[0242] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Less than the length threshold of the reference signal sequence At that time, T0 = 1;

[0243] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Greater than or equal to At that time, T0 = 0;

[0244] Or, |M zc -N zc When the value is greater than the third threshold value G0, T0 = 1 or T0 = 2.

[0245] In one possible implementation, T1 and |M zc -N zc |Related; among which, |M zc -N zc When | is a fixed value, T1 varies with M zc It increases or remains unchanged as the value increases.

[0246] In one possible implementation, T0 and / or T1 are related to the frequency domain resource overhead corresponding to the reference signal sequence. Specifically, when the frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1 and the corresponding T1 is y1; when the frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2 and the corresponding T1 is y2; when c2 is greater than c1, x2 is less than or equal to x1, and y2 is greater than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0247] In one possible implementation, T0 and / or T1 are related to the amount of the second data. Specifically, when the amount of the second data is d1, the corresponding T0 is x1 and the corresponding T1 is y1; when the amount of the second data is d2, the corresponding T0 is x2 and the corresponding T1 is y2; when d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0248] In one possible implementation, T0 and / or T1 are related to termination capabilities. Termination capabilities include power amplifier correction intervals and / or reduction of the peak-to-average power ratio of the reference signal; when termination capabilities are not supported, the corresponding T0 is x3 and the corresponding T1 is y3; when termination capabilities are supported, the corresponding T0 is x4 and the corresponding T1 is y4; wherein x4 is less than or equal to x3, and y4 is greater than or equal to y3.

[0249] In one possible implementation, the reference signal includes one or more of the following: DMRS, SRS, or CSI-RS.

[0250] In one possible implementation, the transceiver unit 1320 is used to output indication information for T0 and / or T1. The indication information for T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, wherein the first index value is associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

[0251] In one possible implementation, processing unit 1310 is used to acquire a set of threshold values, including T0 and T1. Transceiver unit 1320 is used to output indication information of the root θ0 of the first time-domain ZC sequence. The value of θ0 satisfies the following condition: the value of θ0 belongs to the first set {1,2,…,N}. zc When -1}, And / or, the value of θ0 belongs to the second set. hour, in, and Another set of threshold values ​​determined for the first device, and

[0252] As can be seen, when the information processing device 1300 is used to implement the function of the first device in the method embodiments shown in Figures 6 and 7, the information processing device 1300 can define the ZC sequence in the time domain, which is beneficial for selecting the root of the time-domain ZC sequence that generates a low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirement when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0253] When the information processing device 1300 is used to implement the function of the second device in the method embodiments shown in Figures 6 and 7: the processing unit 1310 is used to acquire a time-domain ZC sequence, which is used to indicate a reference signal sequence. The time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is related to the length of the reference signal sequence, and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. The transceiver unit 1320 is used to transmit a reference signal, which is determined based on a reference signal sequence.

[0254] In one possible implementation, the value of the root of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio of the reference signal. The first data employs single-carrier modulation, and the first data and the reference signal occupy different time-domain resources.

[0255] In one possible implementation, when the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability. The second data employs single-carrier modulation and is frequency-division multiplexed with the reference signal sequence.

[0256] In one possible implementation, the root of the time-domain ZC sequence is denoted as θ, and the length of the time-domain ZC sequence is denoted as N. zc The length of the reference signal sequence is denoted as M. zc ; where N zc N is a prime number. zc With M zc Related. Among them, the value of the root of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0.

[0257] In one possible implementation, T0 and / or T1 are related to one or more of the following: the length of the reference signal sequence, M zc and N zc The absolute value of the difference between them |M zc -N zc | The modulation order of the first data, the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability.

[0258] In one possible implementation, the value of θ belongs to the first set {1,2,…,N}. zc When θ = -1, the relationship between the root of the time-domain ZC sequence and T0 and / or T1 includes: θ is greater than T0 and less than or equal to T1; and / or, θ is greater than or equal to N. zc The difference between N and T1, and less than or equal to N. zc The difference between T0 and T0.

[0259] In one possible implementation, the value of θ belongs to the second set. When the root of the time-domain ZC sequence is related to T0 and / or T1, the absolute value of θ is greater than T0 and less than or equal to T1.

[0260] In one possible implementation, T0 and M zc and |M zc -N zc |Related;

[0261] Among them, |M zc -N zc When | equals 1, T0 = 0;

[0262] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Less than the length threshold of the reference signal sequence At that time, T0 = 1;

[0263] Or, |M zc -N zc | Greater than 1 and less than or equal to the third threshold value G0, and M zc Greater than or equal to At that time, T0 = 0;

[0264] Or, |M zc -N zc When the value is greater than the third threshold value G0, T0 = 1 or T0 = 2.

[0265] In one possible implementation, T1 and |M zc -N zc |Related; among which, |Mzc -N zc When | is a fixed value, T1 varies with M zc It increases or remains unchanged as the value increases.

[0266] In one possible implementation, T0 and / or T1 are related to the frequency domain resource overhead corresponding to the reference signal sequence. Specifically, when the frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1 and the corresponding T1 is y1; when the frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2 and the corresponding T1 is y2; when c2 is greater than c1, x2 is less than or equal to x1, and y2 is greater than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0267] In one possible implementation, T0 and / or T1 are related to the amount of the second data. Specifically, when the amount of the second data is d1, the corresponding T0 is x1 and the corresponding T1 is y1; when the amount of the second data is d2, the corresponding T0 is x2 and the corresponding T1 is y2; when d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; where x1, x2, y1, and y2 are positive integers.

[0268] In one possible implementation, T0 and / or T1 are related to termination capabilities. Termination capabilities include power amplifier correction intervals and / or reduction of the peak-to-average power ratio of the reference signal; when termination capabilities are not supported, the corresponding T0 is x3 and the corresponding T1 is y3; when termination capabilities are supported, the corresponding T0 is x4 and the corresponding T1 is y4; wherein x4 is less than or equal to x3, and y4 is greater than or equal to y3.

[0269] In one possible implementation, the reference signal includes one or more of the following: DMRS, SRS, or CSI-RS.

[0270] In one possible implementation, the processing unit 1310 is used to acquire indication information of T0 and / or T1. The indication information of T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, wherein the first index value is associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

[0271] In one possible implementation, the transceiver unit 1320 is used to output a set of threshold values, which includes T0 and T1. The second device acquires the indication information of the root θ0 of the first time-domain ZC sequence. The value of θ0 satisfies the following condition: the value of θ0 belongs to the first set {1,2,…,N}. zc When -1}, T0<θ0≤T1, N zc -T1≤θ0 <N zc -T0; and / or, the value of θ0 belongs to the second set. When T0 < |θ0| ≤ T1.

[0272] As can be seen, when the information processing device 1300 is used to implement the function of the second device in the method embodiments shown in Figures 6 and 7, the information processing device 1300 can define the ZC sequence in the time domain, which is beneficial for selecting the root of the time-domain ZC sequence that generates a low PAPR reference signal. Furthermore, the root of the selected time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence, ensuring that the reference signal PAPR meets the requirements when the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence changes. For example, the PAPR requirement could be that the PAPR is lower than a preset threshold. As another example, when the reference signal and data symbols (which occupy different time-domain resources) are transmitted together, the PAPR requirement could be that the PAPR of the reference signal is not higher than the PAPR of the data symbol.

[0273] Optionally, a more detailed description of the above-mentioned processing unit 1310 and transceiver unit 1320 can be found in the relevant descriptions in the method embodiments shown in Figures 6 and 7.

[0274] As shown in Figure 14, the information processing device 1400 includes at least one processor 1410 and an interface circuit 1420. The at least one processor 1410 and the interface circuit 1420 are coupled to each other. It is understood that the interface circuit 1420 can be a transceiver or an input / output interface. Optionally, the information processing device 1400 may also include a memory 1430 for storing instructions executed by the at least one processor 1410, or storing input data required for the at least one processor 1410 to execute instructions, or storing data generated after the at least one processor 1410 executes instructions. Sometimes, the interface circuit 1420 can also be understood as part of the at least one processor 1410, in which case the information processing device 1400 includes at least one processor 1410. Optionally, the transceiver includes a transmitter and a receiver.

[0275] When the information processing device 1400 is used to implement the method embodiments shown in FIG6 and FIG7, at least one processor 1410 is used to implement the functions of the processing unit 1310, and the interface circuit 1420 is used to implement the functions of the transceiver unit 1320.

[0276] A transceiver provides a communication interface or means for communicating with various other devices via a wireless transmission medium. The transceiver may be coupled to an antenna array, and the transceiver and antenna array may be used together for communication with a corresponding network type. At least one interface (e.g., a network interface and / or a user interface) provides a communication interface or means for communication via an internal bus or via an external transmission medium.

[0277] The processor is responsible for managing the bus and general processing, including executing software stored on a computer-readable medium. When executed by the processor, the software causes the processing system to perform the various functions described below for any particular device. Functions that can be implemented by the processor, memory, and computer-readable medium may include: encoding, decoding, rate matching, rate dematching, scrambling, descrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), inverse discrete Fourier transform (IDFT), precoding, resource element (RE) mapping, channel equalization, RE demapping, digital beamforming (BF), adding CP, removing CP, and so on.

[0278] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be RAN nodes or terminals, or modules within RAN nodes or terminals. Information transmission and reception can be between RAN nodes and terminals, such as between a base station and a terminal; between two RAN nodes, such as between a CU and a DU; or between different modules within a single device, such as between a terminal chip and other modules of the terminal, or between a base station chip and other modules of the base station.

[0279] In other words, sending and receiving can occur between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, wiring, or interfaces.

[0280] It is understandable that information may undergo necessary processing, such as encoding and modulation, between the source and destination, but the destination can understand the valid information from the source. Similar statements in this application can be interpreted in a similar way and will not be elaborated further.

[0281] This application also provides a communication system, which includes one or more of a terminal, an access network device, or a first network element. The first network element is used to perform all or part of the steps performed by the first network element in the preceding embodiments. The terminal is used to perform all or part of the steps performed by the terminal in the preceding embodiments. The access network device is used to perform all or part of the steps performed by the access network device in the preceding embodiments.

[0282] This application provides a computer-readable storage medium. The computer-readable storage medium stores a program or instructions. When the program or instructions are executed on a computer, the computer performs the communication method shown in the embodiments of FIG6 and FIG7.

[0283] This application provides a computer program product. The computer program product includes instructions. When the instructions are executed on a computer, the computer performs the communication method shown in the embodiments of FIG6 and FIG7.

[0284] This application provides a chip or chip system including at least one processor and at least one interface, the at least one interface and at least one processor being interconnected via a circuit, the at least one processor being used to run computer programs or instructions to perform the communication methods shown in the embodiments of FIG6 and FIG7.

[0285] The interfaces in the chip can be input / output interfaces, pins, or circuits, etc.

[0286] The aforementioned chip system can be a System-on-a-Chip (SoC) or a baseband chip, etc. The baseband chip can include a processor, channel encoder, digital signal processor, modem, and interface module, etc.

[0287] In one possible implementation, the chip or chip system described above in this application further includes at least one memory, in which instructions are stored. The at least one memory can be an internal storage unit of the chip, such as a register, cache, etc., or it can be a storage unit of the chip itself (e.g., read-only memory, random access memory, etc.).

[0288] In one possible implementation, the chip architecture provided in this application includes a CU, a DU, and a RU. The CU performs layer 2 (L2) and layer 3 (L3) functions. Midhaul and backhaul interfaces are used to carry traffic between the CU and DU, as well as between the CU and the core network. The DU performs layer 1 (L1) and some L2 functions, while the RU performs L1 computation and RF digital functions. Fronthaul and backhaul interfaces are used to carry traffic between the RU and DU, as well as between the CU and DU. An integrated DU includes the aforementioned DU and RU functions.

[0289] The CU / DU hardware includes a chassis platform, motherboard, peripherals, and cooling system. The motherboard contains processing units, memory, internal I / O interfaces, and external connection ports. Its hardware accelerator is designed with interfaces, and hardware functional components include: storage for software, hardware, and system debugging interfaces, and a single-board management controller.

[0290] DU systems are typically implemented using multi-core processors and one or more hardware accelerators. Parts of the DU protocol stack can be implemented in software running on the multi-core processor, while computationally intensive L1 and L2 functions can be offloaded to a field-programmable gate array (FPGA) / graphics processing unit (GPU)-based hardware accelerator; alternatively, all L1 functions can be offloaded to an FPGA / GPU-based hardware accelerator, while other protocol stack components are implemented in software running on the processor; or the entire protocol stack can be implemented in software running on the processor. The hardware accelerator supports interconnection with x86 or non-x86 processors. Similarly, the accelerator has a multi-channel PCIe interface pointing to the central processing unit (CPU) and external connections via GbE.

[0291] The RU comprises three parts: the O-RAN processing unit (OPU), which receives eCPRI frames from the O-RAN fronthaul and performs fronthaul interface operations, the lowest level L1 (encoding, scrambling, modulation, layer mapping, precoding), synchronization, beamforming, and resource unit mapping. The OPU can be implemented as a CPU, FPGA, or application-specific integrated circuit (ASIC). The O-RU's digital processing unit (DPU) performs synchronization, digital downconversions (DDC) in the UL, and digital upconversions (DUC) in the DL, improving power amplifier efficiency by reducing the peak-to-average power ratio (PAPR) / adjacent channel leakage ratio (ACLR) of the RF front-end; the DPU can be implemented as an FPGA or ASIC. The O-RU's RF processing unit includes a transceiver module, up / down converters, power amplifiers (PA), low-noise amplifiers (LNA), and transmit / receive (Tx / Rx) filters. All conversions between the analog and digital domains (such as digital-to-analog converters (DACs) and analog-to-digital converters (ADCs)). Note that physical and logical partitions within the RF processing unit do not require specific boundaries.

[0292] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in a base station or terminal. The processor and storage medium can also exist as discrete components in a base station or terminal.

[0293] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0294] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0295] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0296] In this application, terms such as "first" and "second" may be used to distinguish technical features that have the same or similar functions. The terms "first" and "second" do not limit the number or execution order, nor do they necessarily imply that they are different.

[0297] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. The use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0298] It is understood that in this application, “when…”, “…when…”, and “if” all refer to the corresponding processing that will be carried out under certain objective circumstances, and are not time-limited, nor do they require a judgment action when implemented, nor do they imply any other limitations.

[0299] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.

[0300] In the embodiments of this application, "instruction" can include direct and indirect instructions, as well as explicit and implicit instructions. The information indicated by a certain piece of information (hereinafter referred to as instruction information) is called the information to be instructed. In specific implementation, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is an association between the other information and the information to be instructed; or it can indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction can be implemented by using a pre-agreed (e.g., protocol predefined) arrangement of various information, thereby reducing the instruction overhead to a certain extent. This application does not limit the specific method of instruction. It is understood that for the sender of the instruction information, the instruction information can be used to indicate the information to be instructed; for the receiver of the instruction information, the instruction information can be used to determine the information to be instructed.

[0301] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. An information processing method characterized by comprising: The method includes: A time-domain ZC sequence is obtained, which is used to indicate a reference signal sequence; the time-domain ZC sequence is determined based on the root of the time-domain ZC sequence, and the value of the root of the time-domain ZC sequence is related to the length of the reference signal sequence and / or the absolute value of the difference between the length of the reference signal sequence and the length of the time-domain ZC sequence. A reference signal is transmitted, which is determined based on the reference signal sequence.

2. The method of claim 1, wherein, The value of the root of the time-domain ZC sequence is also related to the modulation order of the first data and / or the scheme for reducing the peak-to-average power ratio of the reference signal; The first data uses single-carrier modulation, and the first data and the reference signal occupy different time-domain resources.

3. The method according to claim 1 or 2, characterized in that, When the reference signal includes the second data, the value of the root of the time-domain ZC sequence is also related to one or more of the following: the frequency domain resource overhead corresponding to the reference signal sequence, the amount of the second data, or the terminal capability; The second data is frequency-division multiplexed with the reference signal sequence.

4. The method according to any one of claims 1 to 3, characterized in that, A root of the time-domain ZC sequence is denoted as θ, and a length of the time-domain ZC sequence is denoted as N zc , a length of the reference signal sequence is denoted as M zc ; the N zc is a prime number, the N zc is related to the M zc . The root value of the time-domain ZC sequence is related to the first threshold value T0 and / or the second threshold value T1; T0 is greater than or equal to 0, and T1 is greater than or equal to T0.

5. The method of claim 4, wherein, The T0 and / or T1 is related to one or more of: a length of the reference signal sequence, M zc and an absolute value of a difference between N zc and M zc -N zc , a modulation order of the first data, a frequency domain resource overhead corresponding to the reference signal sequence, an amount of the second data, or a terminal capability.

6. The method of claim 4, wherein, The value of the θ belongs to the first set {1, 2, …, N zc -1}, the value of the root of the time domain ZC sequence and the relationship of the T0 and / or the T1 include: The θ is greater than the T0 and less than or equal to the T1; and / or, the θ is greater than or equal to the N zc a difference from the T1, and is less than or equal to the N zc a difference from the T0.

7. The method of claim 4, wherein, The value of the theta belongs to a second set The relationship between the value of the root of the time domain ZC sequence and the T0 and / or the T1 includes that the absolute value of the theta is greater than the T0 and less than or equal to the T1.

8. The method of claim 5, wherein, The To and the M zc And |M zc -N zc | related; wherein said |M zc -N zc | equals 1, said T0= 0; or the M zc -N zc | is greater than 1 and less than or equal to a third threshold value G0, and the M zc is less than a length threshold value of the reference signal sequence T0 = ​​1; or the M zc - N zc | is greater than 1 and less than or equal to a third threshold value G0, and the M zc greater than or equal to the T0 = ​​0; Or, the |M zc -N zc | is greater than a third threshold value G0, the T0 = 1 or T0 = 2.

9. The method according to any one of claims 5 to 8, characterized in that, The T1 and |M zc -N zc | related; wherein said |M zc -N zc | is a constant value, said T1 increases or remains constant with the increase of said M zc .

10. The method according to any one of claims 5 to 9, characterized in that, The T0 and / or the T1 are related to the frequency domain resource overhead corresponding to the reference signal sequence; The frequency domain resource overhead corresponding to the reference signal sequence is c1, the corresponding T0 is x1, and the corresponding T1 is y1; The frequency domain resource overhead corresponding to the reference signal sequence is c2, the corresponding T0 is x2, and the corresponding T1 is y2; The c2 is greater than the c1, the x2 is less than or equal to the x1, and the y2 is greater than or equal to the y1; Wherein, x1, x2, y1, and y2 are positive integers.

11. The method according to any one of claims 5 to 10, characterized in that, The T0 and / or T1 are related to the amount of the second data; wherein the amount of the second data is d1, the corresponding T0 is x1, and the corresponding T1 is y1; the amount of the second data is d2, the corresponding T0 is x2, and the corresponding T1 is y2; d2 is greater than d1, x2 is greater than or equal to x1, and y2 is less than or equal to y1; wherein x1, x2, y1, and y2 are positive integers.

12. The method according to any one of claims 5 to 11, characterized in that, The T0 and / or the T1 are related to the terminal capabilities; The terminal capabilities include power amplifier correction interval and / or reduction of the peak-to-average power ratio of the reference signal; If the terminal capability is not supported, the corresponding T0 is x3 and the corresponding T1 is y3; if the terminal capability is supported, the corresponding T0 is x4 and the corresponding T1 is y4; where x4 is less than or equal to x3 and y4 is greater than or equal to y3.

13. The method according to any one of claims 4 to 12, characterized in that, Applied to the first device, the method further includes: Output the indication information for T0 and / or T1; The indication information of T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, wherein the first index value is associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

14. The method according to any one of claims 4 to 12, characterized in that, Applied to a second device, the method further includes: Obtain the indication information of T0 and / or T1; The indication information of T0 and / or T1 includes one or more sets of threshold values ​​or a first index value, wherein the first index value is associated with a set of threshold values; the set of threshold values ​​includes T0 and T1.

15. The method according to any one of claims 4 to 12, characterized in that, Applied to the first device, the method further includes: Obtain a set of threshold values, wherein the set of threshold values ​​includes T0 and T1; Output the indication information of the root θ0 of the first time-domain ZC sequence; wherein the value of θ0satisfies: the value of θ0belongs to a first set {1, 2, …, N zc -1}, and / or, the value of θ0 belongs to a second set wherein the and Another set of threshold values is determined for the first device, and the The 16. The method according to any one of claims 4 to 12, characterized in that, Applied to a second device, the method further includes: Output a set of threshold values, wherein the set of threshold values ​​includes T0 and T1; Obtain the indication information of the root θ0 of the first time-domain ZC sequence; Wherein, the value of θ0 satisfies: the value of θ0 belongs to a first set {1, 2, …, N zc -1}, T0< θ0≤ T1, N zc -T1≤ θ0< N zc -T0; and / or, the value of θ0 belongs to a second set T0 < |θ0| ≤ T1.

17. An information processing apparatus comprising: It includes modules or units for performing the method as described in any one of claims 1 to 12, 13, and 15, or includes modules or units for performing the method as described in any one of claims 1 to 12, 14, and 16.

18. An information processing apparatus comprising: The device includes a memory and one or more processors, the memory being used to store a computer program; the one or more processors being used to execute the computer program in the memory, causing the information processing device to perform the method as claimed in any one of claims 1-12, 13, and 15, or to perform the method as claimed in any one of claims 1 to 12, 14, and 16.

19. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed by an information processing device, implement the method as claimed in any one of claims 1 to 12, 13, and 15, or implement the method as claimed in any one of claims 1 to 12, 14, and 16.

20. A computer program product, characterised in that, Includes instructions that, when executed on a computer, cause the method as described in any one of claims 1 to 12, 13, 15, or claims 1 to 12, 14, 16 to be performed.

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