Communication method and apparatus

Abstract

A communication method and apparatus. The method comprises: modulating a first bitstream on the basis of a first modulation scheme, so as to obtain a first data signal; and sending a reference signal, wherein the reference signal comprises a first data signal and a demodulation reference signal (DMRS) sequence, and frequency-domain resources occupied by the first data signal do not overlap with those occupied by the DMRS sequence. The DMRS sequence is generated on the basis of a ZC sequence; the root of the ZC sequence is one from a first root set, and any one root in the first root set meets a first condition, which comprises: the absolute value of a first value, which is determined on the basis of the root in the first root set, the cycle of the ZC sequence and a first parameter, being smaller than or equal to a first threshold value, and greater than or equal to a second threshold value, wherein the first threshold value and the second threshold value are both positive integers, and the cycle of the ZC sequence is the greatest prime number that is smaller than the length of the DMRS sequence. In the method, by means of constraining the selection of a root value of a ZC sequence, a PAPR corresponding to a DMRS symbol is ensured to be relatively small.

Description

Communication method and apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202410756150.9, filed on June 12, 2024, and entitled “Communication method and apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and apparatus. BACKGROUND

[0003] The physical downlink shared channel (PDSCH) and the physical uplink shared channel (PUSCH) are respectively used for transmitting downlink data and uplink data. In long term evolution (LTE) and new radio (NR), the demodulation reference signal (DMRS) is used for channel estimation when demodulating data symbols in the PDSCH or the PUSCH.

[0004] In LTE and NR, the DMRS design can be divided into two types according to the frequency domain resources occupied by the DMRS: Type 1 and Type 2. Whether it is Type 1 or Type 2, it only occupies part of the subcarriers within one resource block (RB). At the same time, the occupied subcarriers are power boosted, and the unoccupied subcarriers are empty. For example, for Type 1, only 6 subcarriers within 1 RB are used to place DMRS, and the 6 subcarriers are empty. In addition, each of the 6 occupied subcarriers is power boosted by 3 dB. The prior art proposes that the unoccupied subcarriers are no longer empty, but transmit single-carrier data (i.e., the discrete Fourier transform (DFT) result of a sequence of quadrature amplitude modulation (QAM) symbols is placed in the frequency domain). That is, the DMRS symbol also carries data at this time, and the DMRS sequence and the data use frequency division multiplexing. The advantage of this is that it will improve the spectral efficiency and reduce the demodulation delay. For example, previously in NR, the DMRS symbol and the data symbol were time division multiplexed, and two symbols (one DMRS symbol and one data symbol) needed to be received before data demodulation could begin. Now, only the DMRS symbol needs to be received before data demodulation can begin.

[0005] Taking a single-symbol Type 1 DMRS design as an example, FIG. 1 is a schematic diagram of frequency division multiplexing of a DMRS sequence and data within a DMRS symbol. As shown in FIG. 1, even-indexed subcarriers within an RB are used to carry a DMRS sequence, for example, subcarriers 0, 2, 4, 6, 8, and 10 are used to carry a DMRS sequence. Odd-indexed subcarriers are used to transmit data, for example, subcarriers 1, 3, 5, 7, 9, and 11 are used to transmit data. However, frequency division multiplexing of a DMRS sequence and data can deteriorate the peak-to-average power ratio (PAPR) of a DMRS symbol, so that the PAPR of the DMRS symbol is higher than that of a data symbol. SUMMARY

[0006] The present application provides a communication method, which ensures a low PAPR of a DMRS symbol in the case that a DMRS sequence is generated based on a Zadoff-Chu (ZC) sequence.

[0007] In a first aspect, a communication method is provided, which is performed by a sending end. In the absence of special instructions, the "sending end device" in the present application can refer to the sending end itself, or a component (for example, a processor, a chip, or a chip system, etc.) in the sending end, or a logic module or software capable of realizing all or part of the functions of the sending end. Hereinafter, the sending end device is taken as an example for introduction.

[0008] The method comprises: modulating, by the sending end device, a first bit stream based on a first modulation scheme to obtain a first data signal; and sending, by the sending end device, a reference signal, the reference signal comprising the first data signal and a DMRS sequence, the first data signal and the DMRS sequence occupying non-overlapping frequency domain resources; wherein the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one root in a first root set, any root in the first root set satisfying a first condition, the first condition comprising: an absolute value of a first value being greater than or equal to a second threshold value and less than or equal to a first threshold value, wherein the first value is determined based on a root in the first root set, a period of the ZC sequence, and a first parameter, the first threshold value being greater than the second threshold value, the first threshold value and the second threshold value both being positive numbers, and the period of the ZC sequence being a largest prime number less than a length of the DMRS sequence.

[0009] It should be understood that in the embodiments of the present application, the reference signal can also be referred to as a DMRS symbol, wherein the DMRS symbol carries a DMRS sequence and a first data signal, and the DMRS sequence and the first data signal can be located in the DMRS symbol in a frequency division multiplexing manner. The data symbol refers to a symbol carrying data, that is, in the present application, the data symbol refers to a symbol carrying a second data signal, which will not be described below.

[0010] It should also be understood that the DMRS symbol in the embodiments of the present application is different from the DMRS symbol in the existing NR, specifically, in the existing NR, the DMRS symbol only carries a DMRS sequence, while the DMRS symbol in the embodiments of the present application carries a DMRS sequence and a first data signal, in other words, the DMRS symbol in the embodiments of the present application can be considered as a time domain symbol multiplexing a DMRS sequence and a first data signal.

[0011] It should also be understood that the period of the ZC sequence can also be referred to as the length of the ZC sequence, for example, the period of the ZC sequence can be represented as N zc The length of the DMRS sequence can be represented as M zc .

[0012] In the technical solutions of the present application, the DMRS sequence is generated based on a ZC sequence, and by constraining the root of the ZC sequence to be a root in a first root set satisfying a first condition, the PAPR corresponding to the DMRS symbol is ensured to be low.

[0013] In combination with the first aspect, in some possible implementation manners, the method further includes: the sending end device modulates a second bit stream based on a second modulation scheme to obtain a second data signal; and the sending end device sends the second data signal, wherein the time domain resources occupied by the second data signal and the reference signal are not overlapped.

[0014] It should be understood that the time domain resources occupied by the second data signal and the reference signal in the present application can be understood as not being the same.

[0015] Based on the above technical solutions, it can also be ensured that the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0016] In combination with the first aspect, in some possible implementation manners, the first parameter is an integer that minimizes the absolute value of the first value.

[0017] In combination with the first aspect, in some possible implementation manners, the first threshold value and the second threshold value are related to a second value, and the second value is related to the period of the ZC sequence and / or the length of the DMRS sequence.

[0018] In some possible implementation manners, in combination with the first aspect, the second value is an absolute value of a difference between the length of the DMRS sequence and the period of the ZC sequence, wherein the second value includes X1 and X2, a first threshold corresponding to the X1 is Y1, a second threshold corresponding to the X1 is Z1, a first threshold corresponding to the X2 is Y2, a second threshold corresponding to the X2 is Z2, and if X1 > X2, Y1 >= Y2 and Z1 >= Z2.

[0019] In some possible implementation manners, in combination with the first aspect, when the second value = 1, the second threshold = 1; and when the second value >= 2, the second threshold >= 2.

[0020] In some possible implementation manners, in combination with the first aspect, when the second value >= 2, the second threshold = 1.

[0021] In some possible implementation manners, in combination with the first aspect, the difference between the length of the DMRS sequence and the period of the ZC sequence is a fixed value, and the second value is the period of the ZC sequence or the length of the DMRS sequence, wherein the second value includes x1 and x2, a first threshold corresponding to the x1 is y1, a second threshold corresponding to the x1 is z1, a first threshold corresponding to the x2 is y2, a second threshold corresponding to the x2 is z2, and if x1 > x2, y1 >= y2 and z1 <= z2.

[0022] In some possible implementation manners, in combination with the first aspect, the first root set (set size and elements in the set) is related to the period of the ZC sequence and / or the length of the DMRS sequence.

[0023] Based on the above technical solutions, the PAPR corresponding to the DMRS symbol can be low under different periods of the ZC sequence and / or lengths of the DMRS sequence.

[0024] In some possible implementation manners, in combination with the first aspect, the values of the first threshold and the second threshold are related to the first modulation order, wherein the first modulation order includes M1 and M2, a first threshold corresponding to the M1 is X3, a second threshold corresponding to the M1 is Y3, a first threshold corresponding to the M2 is X4, a second threshold corresponding to the M2 is Y4, and if M1 < M2, X3 <= X4 and Y3 >= Y4.

[0025] In some possible implementation manners, in combination with the first aspect, the first root set (set size and elements in the set) is related to the first modulation order.

[0026] Based on the above technical solutions, the PAPR corresponding to the DMRS symbol can be low under different first modulation orders.

[0027] In some possible implementation modes of the first aspect, the first threshold value and the second threshold value are related to a first modulation order corresponding to the first data signal and a second modulation order corresponding to the second data signal.

[0028] In some possible implementation modes of the first aspect, the first modulation order is the same as the second modulation order, the first modulation order comprises M3 and M4, a first threshold value corresponding to the M3 is x3, a second threshold value corresponding to the M3 is y3, a first threshold value corresponding to the M4 is x4, a second threshold value corresponding to the M4 is y4, and if M3 < M4, x3 ≤ x4 and y3 ≥ y4.

[0029] In some possible implementation modes of the first aspect, the first root set (set size and elements in the set) is related to the first modulation order or the second modulation order.

[0030] Based on the above technical solution, the PAPR corresponding to the DMRS symbol can be low under different first modulation orders or second modulation orders.

[0031] In addition, the technical solution can also ensure that the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0032] In some possible implementation modes of the first aspect, the first threshold value and the second threshold value are related to a third value, the third value is an absolute value of a difference between the first modulation order and the second modulation order, and the first modulation order is smaller than the second modulation order, wherein the third value comprises ΔM1 and ΔM2, a first threshold value corresponding to the ΔM1 is X5, a second threshold value corresponding to the ΔM1 is Y5, a first threshold value corresponding to the ΔM2 is X6, a second threshold value corresponding to the ΔM2 is Y6, and if ΔM1 < ΔM2, X5 ≤ X6 and Y5 ≥ Y6.

[0033] In some possible implementation modes of the first aspect, the first root set (set size and elements in the set) is related to the first modulation order and the second modulation order.

[0034] Based on the above technical solution, the PAPR corresponding to the DMRS symbol can be low under different first modulation orders and different second modulation orders.

[0035] In addition, the technical solution can also ensure that the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0036] In some possible implementation manners, the values of the first threshold and the second threshold are related to a multiplexing manner between the DMRS sequence and the first data signal, and the multiplexing manner includes that the first data signal and the DMRS sequence occupy the same time domain resource, or the first data signal and the DMRS sequence occupy the same time domain resource and the same frequency domain resource, or the first data signal and the DMRS sequence occupy different time domain resources and different frequency domain resources, or the first data signal and the DMRS sequence occupy the same time domain resource and different frequency domain resources, or the first data signal and the DMRS sequence occupy different time domain resources and the same frequency domain resource.

[0037] It should be understood that the first data signal and the DMRS sequence occupy the same time domain resource in the first aspect of the present application, which can be understood as that the first data signal and the DMRS sequence occupy the same time domain resource. The first data signal and the DMRS sequence occupy different time domain resources and different frequency domain resources, which can be understood as that the first data signal and the DMRS occupy different time domain resources and different frequency domain resources.

[0038] In some possible implementation manners, the first root set (set size and elements in the set) is related to a multiplexing manner between the DMRS sequence and the first data signal.

[0039] Based on the above technical solution, the PAPR corresponding to the DMRS symbol is low under different multiplexing manners.

[0040] In some possible implementation manners, the values of the first threshold and the second threshold are related to a fourth value, and the fourth value is a ratio of an energy per resource element EPRE of the first data signal to an EPRE corresponding to the DMRS sequence, wherein the fourth value includes A1 and A2, the first threshold corresponding to the A1 is X7, the second threshold corresponding to the A1 is Y7, the first threshold corresponding to the A2 is X8, and the second threshold corresponding to the A2 is Y8. If A1 < A2, X7 ≥ X8 and Y7 ≤ Y8.

[0041] In some possible implementation manners, the first root set (set size and elements in the set) is related to a ratio of an EPRE corresponding to the first data signal to an EPRE corresponding to the DMRS sequence.

[0042] Based on the above technical solution, the PAPR corresponding to the DMRS symbol is low at different EPRE ratios.

[0043] In addition, the technical solution can also ensure that the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0044] In combination with the first aspect, in some possible implementation manners, the values of the first threshold and the second threshold are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency-domain spectral shaping (FDSS), where the proportion of the reserved subcarriers refers to a proportion between a number of subcarriers occupied by a first signal and a number of subcarriers occupied by the reference signal, and the first signal is carried by the reserved subcarriers.

[0045] In combination with the first aspect, in some possible implementation manners, the first root set (set size and elements in the set) is related to the spectrum spreading factor, the proportion of the reserved subcarriers, or the window function attenuation slope of the FDSS.

[0046] Based on the above technical solution, the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0047] In combination with the first aspect, in some possible implementation manners, the spectrum spreading factor or the proportion of the reserved subcarriers includes T1 and T2, the first threshold corresponding to the T1 is x7, the second threshold corresponding to the T1 is y7, the first threshold corresponding to the T2 is x8, the second threshold corresponding to the T2 is y8, and if T1 < T2, x7 ≥ x8 and y7 ≤ y8.

[0048] In combination with the first aspect, in some possible implementation manners, an absolute value of the FDSS window function attenuation slope includes t1 and t2, the first threshold corresponding to the t1 is X9, the second threshold corresponding to the t1 is Y9, the first threshold corresponding to the t2 is X10, the second threshold corresponding to the t2 is Y10, and if t1 < t2, X9 ≥ X10 and Y9 ≤ Y10.

[0049] Secondly, a communication method is provided, which is executed by a sending end. In the absence of special description, the "sending end device" in the present application can refer to the sending end itself, a component (for example, a processor, a chip, or a chip system) in the sending end, or a logic module or software capable of realizing all or part of the functions of the sending end. Hereinafter, the sending end device is taken as an example for description.

[0050] The method comprises: a sending end device modulating a first bit stream based on a first modulation scheme to obtain a first data signal; the sending end device modulating a second bit stream based on a second modulation scheme to obtain a second data signal; the sending end device sending a reference signal and the second data signal, the reference signal comprising the first data signal and a DMRS sequence, the first data signal and the DMRS sequence occupying non-overlapping frequency domain resources, the reference signal and the second data signal occupying non-overlapping time domain resources; wherein the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one root in a first root set, any root in the first root set satisfying a first condition, the first condition comprising: an absolute value of a first value being greater than or equal to a second threshold value and less than or equal to a first threshold value, the first value being determined based on a root in the first root set, a period of the ZC sequence and a first parameter, the first threshold value being greater than the second threshold value, the first threshold value and the second threshold value both being positive numbers, the period of the ZC sequence being a largest prime number less than a length of the DMRS sequence.

[0051] In combination with the second aspect, in some possible implementation manners, the first root set is related to one or more of the following: the period of the ZC sequence, the length of the DMRS sequence, a first modulation order corresponding to the first data signal, a second modulation order corresponding to the second data signal, a multiplexing manner of the DMRS sequence and the first data signal, a ratio of an EPRE corresponding to the first data signal to an EPRE corresponding to the DMRS sequence, a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of FDSS.

[0052] Based on the above technical solution, in the case that the above one or more parameters correspond to different values, the PAPR corresponding to the DMRS symbol can be ensured to be relatively low, and meanwhile, the PAPR corresponding to the DMRS symbol can be ensured to be not higher than the PAPR of the second data signal.

[0053] In combination with the second aspect, in some possible implementation manners, the first parameter is an integer that minimizes the absolute value of the first value.

[0054] In combination with the second aspect, in some possible implementation manners, the values of the first threshold value and the second threshold value are related to a second value, and the second value is related to the period of the ZC sequence and / or the length of the DMRS sequence.

[0055] In some possible implementation modes of the second aspect, the second value is an absolute value of a difference between a length of the DMRS sequence and a period of the ZC sequence, wherein the second value includes X1 and X2, the first threshold corresponding to the X1 is Y1, the second threshold corresponding to the X1 is Z1, the first threshold corresponding to the X2 is Y2, the second threshold corresponding to the X2 is Z2, and if X1 > X2, Y1 ≥ Y2 and Z1 ≥ Z2.

[0056] In some possible implementation modes of the second aspect, when the second value = 1, the second threshold = 1; and when the second value ≥ 2, the second threshold ≥ 2.

[0057] In some possible implementation modes of the second aspect, when the second value ≥ 2, the second threshold = 1.

[0058] In some possible implementation modes of the second aspect, the difference between the length of the DMRS sequence and the period of the ZC sequence is a fixed value, and the second value is the period of the ZC sequence or the length of the DMRS sequence, wherein the second value includes x1 and x2, the first threshold corresponding to the x1 is y1, the second threshold corresponding to the x1 is z1, the first threshold corresponding to the x2 is y2, the second threshold corresponding to the x2 is z2, and if x1 > x2, y1 ≥ y2 and z1 ≤ z2.

[0059] In some possible implementation modes of the second aspect, the values of the first threshold and the second threshold are related to a first modulation order corresponding to the first data signal and / or a second modulation order corresponding to the second data signal.

[0060] In some possible implementation modes of the second aspect, the values of the first threshold and the second threshold are related to the first modulation order, wherein the first modulation order includes M1 and M2, the first threshold corresponding to the M1 is X3, the second threshold corresponding to the M1 is Y3, the first threshold corresponding to the M2 is X4, the second threshold corresponding to the M2 is Y4, and if M1 < M2, X3 ≤ X4 and Y3 ≥ Y4.

[0061] In some possible implementation modes of the second aspect, the first modulation order is the same as the second modulation order, the first modulation order includes M3 and M4, the first threshold corresponding to the M3 is x3, the second threshold corresponding to the M3 is y3, the first threshold corresponding to the M4 is x4, the second threshold corresponding to the M4 is y4, and if M3 < M4, x3 ≤ x4 and y3 ≥ y4.

[0062] In some possible implementation manners, the first threshold value and the second threshold value are related to a third value, the third value being an absolute value of a difference between the first modulation order and the second modulation order, the first modulation order being smaller than the second modulation order, wherein the third value includes ΔM1 and ΔM2, the first threshold value corresponding to the ΔM1 being X5, the second threshold value corresponding to the ΔM1 being Y5, the first threshold value corresponding to the ΔM2 being X6, the second threshold value corresponding to the ΔM2 being Y6, and X5≤X6 and Y5≥Y6 if ΔM1<ΔM2.

[0063] In some possible implementation manners, the first threshold value and the second threshold value are related to a multiplexing manner between the DMRS sequence and the first data signal, the multiplexing manner including that time domain resources occupied by the first data signal and the DMRS sequence overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, or time domain resources occupied by the first data signal and the DMRS sequence do not overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, wherein the first threshold value is x5 and the second threshold value is y5 when the multiplexing manner is that time domain resources occupied by the first data signal and the DMRS sequence overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, the first threshold value is x6 and the second threshold value is y6 when the multiplexing manner is that time domain resources occupied by the first data signal and the DMRS sequence do not overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, and x5≤x6 and y5≥y6.

[0064] It should be understood that the first data signal and the DMRS sequence in the present application overlap in time domain resources can be understood as that the first data signal and the DMRS sequence occupy the same time domain resources, or the first data signal and the DMRS sequence occupy the same time domain resources. The first data signal and the DMRS sequence do not overlap in time domain resources and do not overlap in frequency domain resources can be understood as that the first data signal and the DMRS do not occupy the same time domain resources and frequency domain resources.

[0065] In some possible implementation manners, the first threshold value and the second threshold value are related to a fourth value, the fourth value being a ratio of an energy per resource element EPRE of the first data signal to an EPRE corresponding to the DMRS sequence, wherein the fourth value includes A1 and A2, the first threshold value corresponding to the A1 being X7, the second threshold value corresponding to the A1 being Y7, the first threshold value corresponding to the A2 being X8, the second threshold value corresponding to the A2 being Y8, and X7≥X8 and Y7≤Y8 if A1<A2.

[0066] In some possible implementation manners, the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency-domain spectral shaping (FDSS), wherein the proportion of reserved subcarriers refers to a proportion between a number of subcarriers occupied by a first signal and a number of subcarriers occupied by the reference signal, the first signal being carried by the reserved subcarriers.

[0067] In some possible implementation manners, the spectrum spreading factor or the proportion of reserved subcarriers includes T1 and T2, the first threshold value corresponding to the T1 is x7, the second threshold value corresponding to the T1 is y7, the first threshold value corresponding to the T2 is x8, the second threshold value corresponding to the T2 is y8, and x7≥x8 and y7≤y8 if T1

[0068] In some possible implementation manners, the absolute value of the FDSS window function attenuation slope includes t1 and t2, the first threshold value corresponding to the t1 is X9, the second threshold value corresponding to the t1 is Y9, the first threshold value corresponding to the t2 is X10, the second threshold value corresponding to the t2 is Y10, and X9≥X10 and Y9≤Y10 if t1

[0069] In a third aspect, a communication method is provided, which is performed by a receiving end. In the case of no special description, the "receiving end device" in the present application can refer to the sending end itself, or a component (for example, a processor, a chip, or a chip system) in the receiving end, or a logic module or software capable of realizing all or part of the receiving end function. Hereinafter, the receiving end device is taken as an example for introduction.

[0070] The method includes: receiving, by the receiving end device, a reference signal, the reference signal including a first data signal and a demodulation reference signal (DMRS) sequence, the first data signal being obtained by modulating a first bit stream based on a first modulation scheme, and the first data signal and the DMRS sequence not occupying overlapped frequency domain resources; wherein the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one root in a first root set, any root in the first root set satisfying a first condition, the first condition including that an absolute value of a first value is greater than or equal to a second threshold value and less than or equal to a first threshold value, the first value being determined based on a root in the first root set, a period of the ZC sequence, and a first parameter, the first threshold value being greater than the second threshold value, the first threshold value and the second threshold value both being positive numbers, and the period of the ZC sequence being a largest prime number smaller than a length of the DMRS sequence.

[0071] With reference to the third aspect, in some possible implementation manners, the method further includes: receiving, by the receiving end device, a second data signal, the second data signal being obtained by modulating a second bit stream based on a second modulation scheme, and the second data signal not overlapping with the time domain resource occupied by the reference signal.

[0072] With reference to the third aspect, in some possible implementation manners, the first parameter is an integer that minimizes the absolute value of the first value.

[0073] With reference to the third aspect, in some possible implementation manners, the first threshold value and the second threshold value are related to a second value, and the second value is related to a period of the ZC sequence and / or a length of the DMRS sequence.

[0074] With reference to the third aspect, in some possible implementation manners, the second value is an absolute value of a difference between the length of the DMRS sequence and the period of the ZC sequence, and the second value includes X1 and X2, a first threshold value corresponding to the X1 is Y1, a second threshold value corresponding to the X1 is Z1, a first threshold value corresponding to the X2 is Y2, and a second threshold value corresponding to the X2 is Z2, and if X1 > X2, Y1 ≥ Y2 and Z1 ≥ Z2.

[0075] With reference to the third aspect, in some possible implementation manners, when the second value = 1, the second threshold value = 1, and when the second value ≥ 2, the second threshold value ≥ 2.

[0076] In a possible implementation manner, when the second value ≥ 2, the second threshold value = 1.

[0077] With reference to the third aspect, in some possible implementation manners, a difference between the length of the DMRS sequence and the period of the ZC sequence is a fixed value, and the second value is the period of the ZC sequence or the length of the DMRS sequence, and the second value includes x1 and x2, a first threshold value corresponding to the x1 is y1, a second threshold value corresponding to the x1 is z1, a first threshold value corresponding to the x2 is y2, and a second threshold value corresponding to the x2 is z2, and if x1 > x2, y1 ≥ y2 and z1 ≤ z2.

[0078] With reference to the third aspect, in some possible implementation manners, the first threshold value and the second threshold value are related to a first modulation order, and the first modulation order includes M1 and M2, a first threshold value corresponding to the M1 is X3, a second threshold value corresponding to the M1 is Y3, a first threshold value corresponding to the M2 is X4, and a second threshold value corresponding to the M2 is Y4, and if M1 < M2, X3 ≤ X4 and Y3 ≥ Y4.

[0079] In some possible implementation modes of the third aspect, the values of the first threshold and the second threshold are related to first modulation order corresponding to the first data signal and second modulation order corresponding to the second data signal.

[0080] In some possible implementation modes of the third aspect, the first modulation order is the same as the second modulation order, the first modulation order includes M3 and M4, the first threshold corresponding to the M3 is x3, the second threshold corresponding to the M3 is y3, the first threshold corresponding to the M4 is x4, the second threshold corresponding to the M4 is y4, if M3 < M4, x3 ≤ x4, y3 ≥ y4.

[0081] In some possible implementation modes of the third aspect, the values of the first threshold and the second threshold are related to a third value, the third value is an absolute value of a difference between the first modulation order and the second modulation order, the first modulation order is smaller than the second modulation order, wherein the third value includes ΔM1 and ΔM2, the first threshold corresponding to the ΔM1 is X5, the second threshold corresponding to the ΔM1 is Y5, the first threshold corresponding to the ΔM2 is X6, the second threshold corresponding to the ΔM2 is Y6, if ΔM1 < ΔM2, X5 ≤ X6, Y5 ≥ Y6.

[0082] In some possible implementation modes of the third aspect, the values of the first threshold and the second threshold are related to a multiplexing mode between the DMRS sequence and the first data signal, the multiplexing mode includes that the first data signal and the DMRS sequence overlap in time domain resource and do not overlap in frequency domain resource, or the first data signal and the DMRS sequence do not overlap in time domain resource and do not overlap in frequency domain resource, wherein when the multiplexing mode is that the first data signal and the DMRS sequence overlap in time domain resource and do not overlap in frequency domain resource, the first threshold is x5, the second threshold is y5, when the multiplexing mode is that the first data signal and the DMRS sequence do not overlap in time domain resource and do not overlap in frequency domain resource, the first threshold is x6, the second threshold is y6, wherein x5 ≤ x6, y5 ≥ y6.

[0083] In some possible implementation modes, the first threshold value and the second threshold value are related to a fourth value, the fourth value being a ratio of an EPRE of the first data signal to an EPRE corresponding to the DMRS sequence, wherein the fourth value includes A1 and A2, the first threshold value corresponding to the A1 being X7, the second threshold value corresponding to the A1 being Y7, the first threshold value corresponding to the A2 being X8, the second threshold value corresponding to the A2 being Y8, and if A1>A2, then X7X8 and Y7Y8.

[0084] In some possible implementation modes, the first threshold value and the second threshold value are related to a fourth value, the fourth value being a ratio of an EPRE of the first data signal to an EPRE corresponding to the DMRS sequence, wherein the fourth value includes A1 and A2, the first threshold value corresponding to the A1 being X7, the second threshold value corresponding to the A1 being Y7, the first threshold value corresponding to the A2 being X8, the second threshold value corresponding to the A2 being Y8, and if A1>A2, then X7X8 and Y7Y8.

[0085] In some possible implementation modes, the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping (FDSS).

[0086] In some possible implementation modes, the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping (FDSS).

[0087] In some possible implementation modes, the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping (FDSS).

[0088] In some possible implementation modes, the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping (FDSS).

[0089] Based on the above technical solutions, in the case that one or more parameters correspond to different values, the PAPR corresponding to the DMRS symbol is ensured to be relatively low.

[0090] In addition, when the first root set is related to the second modulation order, the method can also ensure that the PAPR corresponding to the DMRS symbol is not higher than the PAPR of the second data signal.

[0091] It should be understood that the third aspect corresponds to the above-mentioned first aspect, and the specific description can be referred to the detailed description in the first aspect.

[0092] In a fourth aspect, a communication method is provided, which is executed by a receiving end. In the absence of special description, the "receiving end device" in the present application can refer to the sending end itself, or a component (for example, a processor, a chip, or a chip system, etc.) in the receiving end, or a logic module or software capable of realizing all or part of the receiving end function. In the following, the receiving end device is taken as an example for introduction.

[0093] The method comprises: receiving, by the receiving end device, a reference signal and a second data signal, the reference signal comprising a first data signal and a demodulation reference signal (DMRS) sequence, the first data signal being obtained by modulating a first bit stream based on a first modulation scheme, the second data signal being obtained by modulating a second bit stream based on a second modulation scheme, the first data signal and the DMRS sequence not overlapping in frequency domain resources, and the reference signal and the second data signal not overlapping in time domain resources; wherein the DMRS sequence is generated based on a Zadoff-Chu (ZC) sequence, and a root of the ZC sequence is one root in a first root set, any root in the first root set satisfying a first condition, the first condition comprising: an absolute value of a first value being greater than or equal to a second threshold value and less than or equal to a first threshold value, wherein the first value is determined based on a root in the first root set, a period of the ZC sequence, and a first parameter, the first threshold value being greater than the second threshold value, the first threshold value and the second threshold value both being positive numbers, and the period of the ZC sequence being a largest prime number smaller than a length of the DMRS sequence.

[0094] In combination with the fourth aspect, in some possible implementation manners, the first root set is related to one or more of the following: the period of the ZC sequence, the length of the DMRS sequence, a first modulation order corresponding to the first data signal, a second modulation order corresponding to the second data signal, a multiplexing manner of the DMRS sequence and the first data signal, a ratio of an EPRE corresponding to the first data signal to an EPRE corresponding to the DMRS sequence, a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of FDSS.

[0095] Based on the above technical solution, in the case that one or more parameters correspond to different values, the PAPR corresponding to the DMRS symbol is ensured to be relatively low, and the PAPR corresponding to the DMRS symbol is ensured to be not higher than the PAPR of the second data signal.

[0096] In combination with the fourth aspect, in some possible implementation manners, the first parameter is an integer that minimizes the absolute value of the first value.

[0097] In combination with the fourth aspect, in some possible implementation manners, the first threshold value and the second threshold value are related to a second value, and the second value is related to the period of the ZC sequence and / or the length of the DMRS sequence.

[0098] In combination with the fourth aspect, in some possible implementation manners, the second value is an absolute value of a difference between the length of the DMRS sequence and the period of the ZC sequence, and the second value includes x1 and x2, the first threshold value corresponding to the x1 is y1, the second threshold value corresponding to the x1 is z1, the first threshold value corresponding to the x2 is y2, the second threshold value corresponding to the x2 is z2, and if x1>x2, y1≥y2 and z1≥z2.

[0099] In combination with the fourth aspect, in some possible implementation manners, when the second value is 1, the second threshold value is 1; and when the second value is greater than or equal to 2, the second threshold value is greater than or equal to 2.

[0100] In one possible implementation manner, when the second value is greater than or equal to 2, the second threshold value is 1.

[0101] In combination with the fourth aspect, in some possible implementation manners, a difference between the length of the DMRS sequence and the period of the ZC sequence is a fixed value, and the second value is the period of the ZC sequence or the length of the DMRS sequence, and the second value includes x1 and x2, the first threshold value corresponding to the x1 is y1, the second threshold value corresponding to the x1 is z1, the first threshold value corresponding to the x2 is y2, the second threshold value corresponding to the x2 is z2, and if x1>x2, y1≥y2 and z1≤z2.

[0102] In combination with the fourth aspect, in some possible implementation manners, the first threshold value and the second threshold value are related to a first modulation order corresponding to the first data signal and / or a second modulation order corresponding to the second data signal.

[0103] In some possible implementation manners, the values of the first threshold value and the second threshold value are related to the first modulation order, wherein the first modulation order comprises M1 and M2, the first threshold value corresponding to M1 is X3, the second threshold value corresponding to M1 is Y3, the first threshold value corresponding to M2 is X4, the second threshold value corresponding to M2 is Y4, and X3≤X4 and Y3≥Y4 if M1<M2.

[0104] In some possible implementation manners, the first modulation order is the same as the second modulation order, the first modulation order comprises M3 and M4, the first threshold value corresponding to M3 is x3, the second threshold value corresponding to M3 is y3, the first threshold value corresponding to M4 is x4, the second threshold value corresponding to M4 is y4, and x3≤x4 and y3≥y4 if M3<M4.

[0105] In some possible implementation manners, the values of the first threshold value and the second threshold value are related to a third value, the third value is an absolute value of a difference between the first modulation order and the second modulation order, and the first modulation order is smaller than the second modulation order, wherein the third value comprises ΔM1 and ΔM2, the first threshold value corresponding to ΔM1 is X5, the second threshold value corresponding to ΔM1 is Y5, the first threshold value corresponding to ΔM2 is X6, the second threshold value corresponding to ΔM2 is Y6, and X5≤X6 and Y5≥Y6 if ΔM1<ΔM2.

[0106] In some possible implementation manners, the values of the first threshold value and the second threshold value are related to a multiplexing manner between the DMRS sequence and the first data signal, and the multiplexing manner comprises: the first data signal and the DMRS sequence overlap in time domain resources and do not overlap in frequency domain resources, or the first data signal and the DMRS sequence do not overlap in time domain resources and do not overlap in frequency domain resources, wherein the first threshold value is x5 and the second threshold value is y5 when the multiplexing manner is that the first data signal and the DMRS sequence overlap in time domain resources and do not overlap in frequency domain resources, the first threshold value is x6 and the second threshold value is y6 when the multiplexing manner is that the first data signal and the DMRS sequence do not overlap in time domain resources and do not overlap in frequency domain resources, and x5≤x6 and y5≥y6.

[0107] It should be understood that the first data signal and the DMRS sequence overlap in time domain resources can mean that the first data signal and the DMRS sequence occupy the same time domain resources, or the first data signal and the DMRS sequence occupy the same time domain resources.

[0108] In some possible implementation modes, the values of the first threshold value and the second threshold value are related to a fourth value, the fourth value being a ratio of an EPRE of the first data signal to an EPRE corresponding to the DMRS sequence per resource element, wherein the fourth value includes A1 and A2, the first threshold value corresponding to the A1 being X7, the second threshold value corresponding to the A1 being Y8, the first threshold value corresponding to the A2 being X8, the second threshold value corresponding to the A2 being Y8, and X7≤X8 and Y7≥Y8 if A1>A2.

[0109] In some possible implementation modes, the values of the first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping (FDSS).

[0110] In some possible implementation modes, the spectrum spreading factor or the proportion of reserved subcarriers includes T1 and T2, the first threshold value corresponding to the T1 being x7, the second threshold value corresponding to the T1 being y7, the first threshold value corresponding to the T2 being x8, the second threshold value corresponding to the T2 being y8, and x7≥x8 and y7≤y8 if T1

[0111] In some possible implementation modes, the absolute value of the FDSS window function attenuation slope includes t1 and t2, the first threshold value corresponding to the t1 being X9, the second threshold value corresponding to the t1 being Y9, the first threshold value corresponding to the t2 being X10, the second threshold value corresponding to the t2 being Y10, and X9≥X10 and Y9≤Y10 if t1

[0112] It should be understood that the fourth aspect corresponds to the second aspect described above, and the specific description can be referred to the detailed description in the second aspect.

[0113] In a fifth aspect, a communication apparatus is provided, including a transceiver unit, a processing unit, and the like.

[0114] In some implementation modes of the fifth aspect, the communication apparatus is configured to perform the method of the first aspect and any implementation mode of the first aspect, or the method of the second aspect and any implementation mode of the second aspect, or the method of the third aspect and any implementation mode of the third aspect, or the method of the fourth aspect and any implementation mode of the fourth aspect.

[0115] In a sixth aspect, a chip is provided, including a processor, the processor and a memory are coupled, the memory is configured to store a computer program, the processor is configured to execute the computer program stored in the memory to implement the method in the first aspect and any possible implementation of the first aspect, or the processor is configured to execute the computer program stored in the memory to implement the method in the second aspect and any possible implementation of the second aspect, or the processor is configured to execute the computer program stored in the memory to implement the method in the third aspect and any possible implementation of the third aspect, or the processor is configured to execute the computer program stored in the memory to implement the method in the fourth aspect and any possible implementation of the fourth aspect.

[0116] In a seventh aspect, a computer readable storage medium is provided, having stored thereon a computer program or instructions, which when executed by a processor, cause the method in the first aspect and any possible implementation of the first aspect to be performed, or the method in the second aspect and any possible implementation of the second aspect to be performed, or the method in the third aspect and any possible implementation of the third aspect to be performed, or the method in the fourth aspect and any possible implementation of the fourth aspect to be performed.

[0117] In an eighth aspect, a computer program product is provided, including instructions, which when executed on a computer, cause the method in the first aspect and any possible implementation of the first aspect to be performed, or the method in the second aspect and any possible implementation of the second aspect to be performed, or the method in the third aspect and any possible implementation of the third aspect to be performed, or the method in the fourth aspect and any possible implementation of the fourth aspect to be performed.

[0118] In a ninth aspect, a communication system is provided, including a sending end device and a receiving end device, the sending end device is configured to execute the method in the first aspect and any possible implementation of the first aspect, and the receiving end device is configured to execute the method in the third aspect and any possible implementation of the third aspect. Alternatively, the sending end device is configured to execute the method in the second aspect and any possible implementation of the second aspect, and the receiving end device is configured to execute the method in the fourth aspect and any possible implementation of the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0119] FIG. 1 is a schematic diagram of DMRS and data frequency division multiplexing in a DMRS symbol.

[0120] FIG. 2 is a schematic diagram of a communication system suitable for use with the present application.

[0121] FIG. 3 is a schematic diagram of an AM-AM curve of a solid-state PA.

[0122] FIG. 4 is a schematic diagram of a processing flow of a DFT-s-OFDM technology.

[0123] FIG. 5 is a simulation diagram of PAPR of a DMRS and a QPSK DFT-s-OFDM signal.

[0124] FIG. 6 is a schematic diagram of pilot uniformly distributed in frequency domain subcarriers.

[0125] FIG. 7 is another simulation diagram of PAPR of a DMRS and a QPSK DFT-s-OFDM signal.

[0126] FIG. 8 is a schematic diagram of OFDM / DFT-s-OFDM signal generation with sequence spreading and FDSS.

[0127] FIG. 9 is a schematic flowchart of a communication method 900 provided by an embodiment of the present application.

[0128] FIG. 10 is a simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0129] FIG. 11 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0130] FIG. 12 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0131] FIG. 13 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0132] FIG. 14 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0133] FIG. 15 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0134] FIG. 16 is another simulation diagram of PAPR (dB) value and |y| when CCDF is 0.01.

[0135] FIG. 17 is a simulation diagram of a FDSS window function.

[0136] FIG. 18 is a schematic block diagram of a communication apparatus 1800 provided by an embodiment of the present application.

[0137] FIG. 19 is another communication apparatus 1900 provided by an embodiment of the present application.

[0138] FIG. 20 is a chip system 2000 provided by an embodiment of the present application. DETAILED DESCRIPTION

[0139] In order to facilitate the understanding of the embodiments of the present application, the following points are first explained.

[0140] First, in the present application, "for indicating" can include for directly indicating and for indirectly indicating. When describing that certain indication information is for indicating A, it can include that the indication information directly indicates A or indirectly indicates A, and does not mean that A must be carried in the indication information.

[0141] The information indicated by the indication information is referred to as to-be-indicated information, and in the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be only indicated in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, a protocol stipulates), thereby reducing the indication overhead to a certain extent. At the same time, the common part of each information can be identified and uniformly indicated to reduce the indication overhead caused by separately indicating the same information.

[0142] Second, in the present application, "at least one" means one or more, and "multiple" means two or more (including two). In addition, in the embodiments of the present application, "first", "second", and various numerical numbers (for example, "#1", "#2", etc.) are only for the convenience of description and do not limit the scope of the embodiments of the present application. The size of the serial number of each process below does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe schemes other than the embodiments of the present application. In addition, in the embodiments of the present application, the words such as "S410" are only for the convenience of description and do not limit the order of execution steps.

[0143] Third, in the embodiments of the present application, the words such as "exemplary" or "for example" are used to mean by way of example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be construed as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are used in the sense of presenting related concepts in a concrete manner.

[0144] Fourthly, in the embodiments of the present application, "protocol" can refer to a standard protocol in the communication field, for example, can include the NR protocol and the related protocol applied in the future communication system, and the present application does not limit this.

[0145] Fifthly, in the embodiments of the present application, "of", "corresponding", "corresponding" and "associate" can be mixed sometimes, and it should be pointed out that the meanings expressed are consistent when the differences are not emphasized.

[0146] Sixthly, in the embodiments of the present application, "in the case of" can also be replaced by "when", "if", and it should be pointed out that the meanings expressed are consistent when the differences are not emphasized.

[0147] Seventhly, the term "and / or" in the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in an "or" relationship.

[0148] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, and "sending information" can include direct sending and indirect sending through other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, and "receiving information" can include direct receiving from YY and indirect receiving from YY through other units or modules. In addition, "sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, "sending" or "receiving" can be carried out between devices, for example, network devices and terminal devices respectively send or receive through the air interface, and "sending" or "receiving" can also be carried out within the device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through the bus, wire or interface.

[0149] The technical solutions in the present application will be described below with reference to the drawings.

[0150] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a universal mobile communication system (UMTS), a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) system or new radio (NR), and future communication systems, vehicle-to-X (V2X), which can include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., LTE-V, Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), LTE-M, machine to machine (M2M), etc.

[0151] FIG. 2 is a schematic diagram of a communication system suitable for use with the present application. As shown in FIG. 2, the communication system 100 includes at least one network device, such as the network device 111, the network device 112, and the network device 113 shown in FIG. 1. The wireless communication system can also include at least one terminal device, such as the terminal device 121, the terminal device 122, the terminal device 123, the terminal device 124, the terminal device 125, the terminal device 126, and the terminal device 127 shown in FIG. 1.

[0152] Exemplarily, communications can be conducted between network devices and terminal devices, including but not limited to: multi-site transmission, enhanced mobile broadband (eMBB) transmission, etc., wherein network device 112 and network device 113 as shown in FIG. 1 can conduct multi-site transmission with terminal device 124, and network device 112 as shown in FIG. 1 can conduct eMBB transmission with terminal device 121, terminal device 122 and terminal device 123.

[0153] Exemplarily, communications can also be conducted between network devices, including but not limited to: backhaul, wherein network device 111 and network device 112 as shown in FIG. 1 can conduct communication through backhaul, and network device 111 and network device 113 can also conduct communication through backhaul, wherein network device 112 and network device 113 can play the role of relay nodes in the system.

[0154] Exemplarily, communications can also be conducted between terminal devices, including but not limited to: device-to-device (D2D) transmission, wherein terminal device 122 as shown in FIG. 1 can conduct communication with terminal device 125 through D2D transmission.

[0155] A network device is a network-side device with wireless transceiving function. The network device can be an apparatus in a radio access network (RAN) that provides wireless communication function for terminal devices. The network device can be a 3rd generation partnership project (3GPP)-related cellular system, such as a 5G mobile communication system or a future-oriented evolved system (e.g., a future communication network). The network device can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. For example, the network device can be a base station, an evolved NodeB (eNodeB), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a subsequent evolution of 3GPP, a transmission reception point (TRP), an access node in a WiFi system, a wireless relay node, a wireless backhaul node, or the like. In a communication system employing different radio access technologies (RATs), the name of the device with base station function can be different. For example, in an LTE system, it can be referred to as an eNB or eNodeB, and in a 5G system or NR system, it can be referred to as a gNB. The specific name of the base station is not limited in the present application. The network device can include one or more co-sited or non-co-sited transmission reception points. For another example, the network device can include at least one of the following: one or more central units (CUs), one or more distributed units (DUs), and one or more radio units (RUs).

[0156] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU (open DU), the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CUs (or CU-CPs, CU-UPs), DUs and RUs in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. Exemplarily, the functions of the CU can be implemented by one entity or different entities. For example, the functions of the CU are further divided, i.e., the control plane and the user plane are separated and implemented by different entities, which are a control plane CU entity (i.e., a CU-CP entity) and a user plane CU entity (i.e., a CU-UP entity), respectively. The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the access network device. For example, the CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and the functions of the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the radio link control (RLC) layer, the media / medium access control (MAC) layer and the physical (PHY) layer. In this way, part of the functions of the wireless access network device can be implemented by multiple network function entities. These network function entities can be network elements in a hardware device, or software functions running on a dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). The network device can also include an active antenna unit (AAU). The AAU implements part of the physical layer processing functions, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, in this architecture, high-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It can be understood that the network device can be a device including one or more of the CU node, the DU node and the AAU node. In addition, the CU can be divided into a network device in a radio access network (RAN), or the CU can be divided into a network device in a core network (CN), which is not limited in this application.For another example, in vehicle to everything (V2X) technology, the access network device can be a road side unit (RSU). A plurality of access network devices in a communication system can be base stations of the same type or base stations of different types. A base station can communicate with a terminal device directly or through a relay station. In embodiments of the present application, the device for implementing the function of a network device can be the network device itself or a device capable of supporting the network device to implement the function, such as a chip system or a combination device or component capable of implementing the function of an access network device, which can be installed in the network device. In embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices.

[0157] The terminal device is a user-side device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a communication module, a modem, or a chip system) built into the above devices. The terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, such as cellular communication, device-to-device (D2D) communication, V2X communication, machine-to-machine / machine-type communications (M2M / MTC) communication, Internet of Things, virtual reality (VR), augmented reality (AR), industrial control, self-driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, etc. For example, the terminal device can be a handheld terminal in cellular communication, a communication device in D2D, an Internet of Things device in MTC, a monitoring camera in smart transportation and smart city, or a communication device on an unmanned aerial vehicle, etc. The terminal device can also be referred to as user equipment (UE), user terminal, user device, user unit, user station, terminal, access terminal, access station, UE station, remote station, mobile device, or wireless communication device, etc. The terminal device can also be a terminal device in an IoT system. IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, IoT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, narrow band (NB) technology. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a combination device or component that can realize the function of the terminal device, which can be installed in the terminal device.

[0158] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on airplanes, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0159] Exemplarily, the communication system 100 can further include an application function (AF) network element, which is a control plane network function provided by an operator network, and is used to provide application layer information; and the communication system 100 can further include a session management function (SMF) network element, which is a control plane network function provided by an operator network. In the embodiment of the application, in the case where the AF network element and the SMF network element are included in the communication system 100, the AF can send service-related information to the network device through the SMF.

[0160] In order to facilitate understanding of the embodiments of the application, first, the basic concepts involved in the application are described.

[0161] 1, Orthogonal frequency division multiplexing (OFDM): a sequence S of N d symbols is mapped to corresponding subcarriers, and then an inverse Fourier transform is performed to obtain a time domain signal x m after weighting (that is, precoding, frequency domain windowing, power control, etc.). m Optionally, a cyclic prefix is added. Since the signal on a carrier of OFDM is a sinc function, there will be a tail on the left and right sides. The tails of multiple carriers may, under certain conditions, superimpose to form a point with very high peak power, that is, the use of OFDM waveform is prone to cause the problem of excessively high PAPR.

[0162] Therefore, in order to meet the coverage requirement, a signal generation technology with low PAPR is often selected.

[0163] 2, Power amplifier

[0164] The transmitted signal will pass through a power amplifier (PA) before being transmitted through an antenna, and the PA is used to boost the power of the signal. At present, the PA is evaluated by amplitude modulation-amplitude modulation (AM-AM) and amplitude modulation-phase modulation (AM-PM) characteristics.

[0165] Figure 3 shows an AM-AM curve of a solid-state PA. The figure 4 describes the functional relationship between the output power and the input power. As shown in figure 3, the PA has a linear operating region, in which the output power of the PA increases linearly with the input power, or, it can also be understood that the PA gain (i.e. the ratio of the PA output power and the input power) remains unchanged or the AM-AM curve slope remains unchanged. But as the input power continues to increase, the PA enters a nonlinear region, the output power no longer increases linearly with the input power, the gain appears to be compressed, and the AM-AM curve slope decreases. When the saturation output power is reached, i.e. the output power no longer increases with the increase of the input power, the slope of the AM-AM curve is 0.

[0166] The influence of this nonlinear characteristic of the PA on the transmission signal generally manifests as in-band distortion and out-of-band distortion. The in-band distortion mainly manifests as distortion of the signal in amplitude and phase, which deteriorates the signal demodulation / detection performance; the out-of-band distortion mainly manifests as signal spectrum expansion / regeneration, which will increase the interference on adjacent channel users. In order to alleviate the influence of the PA nonlinearity, the power of the input signal can be appropriately reduced, i.e. input power backoff (IBO) or output power backoff (OBO), so that the PA works as much as possible in the linear region, but this is a method at the expense of reducing the PA efficiency.

[0167] 3. Peak-to-average power ratio (PAPR): The peak-to-average power ratio can be understood as the ratio of the peak power to the average power. Wherein, for a signal x(t), the peak power of the signal x(t) in a certain time interval (such as t0 to t1) is and the average power is The PAPR can be represented as:

[0168] The communication signal is a random signal, for example, an OFDM signal, a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) signal, the average power of which can be regarded as a fixed value, and the peak power is indeed a random variable. Therefore, the PAPR is also a random variable.

[0169] In statistics, the value of a random signal at a certain time is often described by a probability density function. In the communication industry, engineers often use the complementary cumulative distribution function (CCDF) curve to describe the PAPR: the probability that the instantaneous power exceeds the average power by xx dB is yy, or, the proportion of time that the instantaneous power exceeds the average power by xx dB is yy, which can be specifically represented as:

[0170] wherein P(·) denotes probability.

[0171] The higher the PAPR of the PA input signal x(t) is, the greater the floating range of the input power is, and then the more power values need to be backed off in order to ensure that the signal is in the linear amplification range. Therefore, designing a signal with a lower PAPR can improve the transmission power and improve coverage by reducing the PA OBO.

[0172] 4. Single carrier: In order to reduce the PAPR of the OFDM waveform, a single carrier waveform can be used to transmit data. The single carrier waveform includes but is not limited to the following waveforms:

[0173] Single carrier-quadrature amplitude modulation (SC-QAM) waveform, single carrier-offset quadrature amplitude modulation (SC-OQAM) waveform, DFT-s-OFDM waveform, etc.

[0174] In the embodiments of the present application, the network device and the terminal device can use the single carrier waveform described above for communication.

[0175] 5. DFT-s-OFDM waveform: It can be understood as a kind of linear precoding OFDM waveform, that is, there is a discrete Fourier transform (DFT) processing before the OFDM processing process. In order to facilitate understanding, the DFT-s-OFDM technology is briefly introduced in combination with FIG. 4. FIG. 4 is a processing flow diagram of a kind of DFT-s-OFDM technology. The sending end sequentially performs serial-to-parallel conversion, M-point discrete Fourier transform (DFT), subcarrier mapping, N-point inverse discrete Fourier transform (IDFT) (or inverse fast Fourier transform (IFFT)), parallel-to-serial conversion, cyclic prefix (CP) addition, and digital-to-analog conversion (DAC) and other processing on the time domain discrete sequence, and then transmits the signal through the antenna port and the channel.

[0176] The receiving end receives the signal through the channel and the antenna end, and then performs analog to digital conversion (ADC), cyclic prefix removal, serial-to-parallel conversion, N-point DFT, subcarrier mapping removal, M-point IDFT, and parallel-to-serial conversion on the signal to obtain a time domain discrete sequence.

[0177] The transmitting end can obtain a frequency domain sequence corresponding to the time domain discrete sequence through M-point DFT. The frequency domain sequence is input into IDFT after subcarrier mapping, and N-point IDFT is performed, where M < N. Because the length of IDFT is greater than that of DFT, the part with more IDFT is padded with zeros. After IDFT, adding a cyclic prefix can avoid symbol interference.

[0178] Under the same power amplifier, the DFT-s-OFDM waveform can provide greater output power and higher power amplifier efficiency than the above-mentioned OFDM waveform, thereby improving coverage and reducing energy consumption. In some embodiments, the DFT-s-OFDM signal is at least one of the following signals: DFT-s-OFDM with FDSS (frequency-domain spectral shaping), a DFT-s-OFDM signal carrying real and imaginary separation, a DFT-s-OFDM signal carrying a pulse amplitude modulation (PAM) constellation, a DFT-s-OFDM signal carrying real and imaginary separation with an additive filter, a DFT-s-OFDM signal carrying a PAM constellation with an additive filter, and an SC-OQAM signal.

[0179] The DFT-s-OFDM waveform can be applied to uplink transmission, but in high-frequency communication, due to the limited device capability, the PAPR problem is more serious, so the DFT-s-OFDM waveform can also be applied to downlink transmission. The frequency band of high-frequency communication can be 24250 MHz to 52600 MHz in the NR system, can also be a frequency band higher than 52600 MHz supported by the subsequent evolution of the NR system, or can also be a higher frequency band of a future communication network, such as a terahertz (THz) frequency band.

[0180] 6. Pilot: Also known as reference signal, the pilot involved in the present application includes but is not limited to the following reference signals:

[0181] Demodulation reference signal (DMRS), channel state information-reference signal (CSI-RS), tracking reference signal (TRS), sounding reference signal (SRS), phase tracking reference signal (PT-RS), positioning reference signal (PRS), sensing reference signal (SeRS), etc.

[0182] It should be understood that the pilot in the present application can also be a signal capable of being carried in OFDM or single carrier other than the above-mentioned enumerated reference signals, which will not be enumerated one by one here.

[0183] 7. OFDM pilot: OFDM pilot can be directly transmitted on each subcarrier in the frequency domain, and the OFDM pilot and the data subcarrier are orthogonal without interference. The receiver can estimate the channel corresponding to each OFDM pilot subcarrier, and then obtain the channel of the entire frequency band, that is, all subcarriers, and then equalize (remove the channel influence) and demodulate the data carried on other data subcarriers.

[0184] 8. Antenna port: Antenna port is a logical concept, and one antenna port can correspond to one physical transmitting antenna or multiple physical transmitting antennas. In these two cases, the receiver of the terminal does not decompose the signal from the same antenna port. Because from the perspective of the terminal, whether the channel is formed by a single physical transmitting antenna or combined by multiple physical transmitting antennas, the reference signal corresponding to the antenna port defines the antenna port, for example, the DMRS port corresponding to the DMRS, and the terminal can obtain the channel estimation of the antenna port according to the reference signal. Each antenna port corresponds to a time / frequency resource grid, and has its own reference signal. One antenna port is one channel, and the terminal performs channel estimation and data demodulation according to the reference signal corresponding to the antenna port.

[0185] 9. DMRS sequence design under DFT-s-OFDM waveform

[0186] In NR, PUSCH supports two waveforms: OFDM waveform and DFT-s-OFDM waveform. Meanwhile, DMRS sequence is generated based on base sequence, such as DMRS sequence equals to base sequence or DMRS sequence corresponds to cyclic shift of base sequence. Currently, when DFT-s-OFDM waveform is adopted, there are two designs of base sequence: low PAPR sequence generation type 1, low PAPR sequence generation type 2. When low PAPR sequence generation type 2 is adopted and DMRS sequence length M zc ≥ 36, base sequence is generated based on ZC sequence, in particular, as shown in formula (1):

[0187] Wherein, N zc may represent the period of ZC sequence, N zc is the largest prime number less than M zc . For example: M zc = 60, N zc = 59. q represents root index of ZC sequence, and q is coprime with N zc . In NR, q is defined as shown below:

[0188] Wherein, u ∈ {0, 1, …, 29}. When 36 ≤ M ZC ≤ 60, v = 0, and when 72 ≤ M ZC , v can take 0 and 1.

[0189] Wherein, the set constituted by the above NR design q value design can be represented as Since u has 30 values, it can be inferred that if v = 0, the set contains 30 q values; if v can take 0 and 1, the set contains 60 q values.

[0190] Under the constraint condition that q is coprime with N ZC , q has (N ZC -1) values, for example, these (N ZC -1) values can constitute the set It can be seen that is a subset of the set .

[0191] For example, when M ZC = 36, N ZC = 31, at this time is the same as .

[0192] For example, when M​ZC = 72, N ZC = 71, IDFT size is 4096. q values are from the set

[0193] The is a subset of the set .

[0194] Figure 5 shows the PAPR of DMRS (the DMRS sequence is OFDM modulated and does not carry data symbols), where M ZC = 72, N ZC = 71, IDFT size is 4096. q values are from the set , respectively, 2, 5, 16, 50. It can be seen that the PAPR of the signal is related to the q value. The PAPR of a quadrature phase shift keying (QPSK) DFT-s-OFDM signal is also shown in Figure 5. It can be seen that when the q value is 16 and 50, the PAPR of the DMRS exceeds the PAPR of the QPSK DFT-s-OFDM signal, which violates the design requirement that the PAPR of the DMRS does not exceed the PAPR of the data signal.

[0195] 10. DMRS sequence is frequency division multiplexed (FDM) with single carrier data

[0196] In NR, the DMRS symbol can also carry data when the following two conditions are met:

[0197] 1) The number of symbols occupied by PDSCH / PUSCH is less than or equal to 2;

[0198] 2) The waveform uses CP-OFDM waveform.

[0199] There are proposals that the DMRS symbol can also carry data when the above conditions are not met, in order to improve spectral efficiency. And in order to reduce the PAPR corresponding to the DMRS symbol, a technical solution is proposed that the DMRS symbol carries single carrier data (i.e. the subcarrier carries the DFT result of a QAM symbol sequence), i.e. the DMRS sequence is FDM with single carrier data, as shown in Figure 1. It should be understood that the cost of the DMRS symbol carrying data is to worsen the channel estimation performance, because the DMRS sequence cannot be power boosted or the power boosting value is small at this time.

[0200] Figure 1 shows that in the single-symbol Type 1 DMRS design, the subcarriers with odd indices are used to carry pilots, and the remaining subcarriers are used to carry data symbols. The pilots are uniformly inserted in the frequency domain resource with density 1 / 2, i.e., every 1 subcarrier, there is one pilot, and the data is placed in the middle of the pilots. The uniform placement of pilots is beneficial to obtain better channel estimation performance. In general, the pilots are uniformly inserted in the frequency domain resource with density 1 / Δ, i.e., every (Δ-1) subcarriers, there is one pilot. Figure 6 shows the FDM scheme for Δ=3 and Δ=4.

[0201] Suppose that the subcarrier index in the transmission bandwidth starts from 0, and the subcarrier index corresponding to the 0th pilot subcarrier is denoted as δ, where δ is an integer in the set [0, Δ-1]. It can be seen that in the schemes shown in Figures 1 and 6, δ=0.

[0202] When the DMRS sequence and the single-carrier data are FDMed, the problem of the PAPR of the DMRS exceeding the PAPR of the data symbol can occur. Considering Δ=2 and a transmission bandwidth of 270 RBs and an IDFT size of 4096, Figure 7 shows the PAPR of the DMRS (DFT result of the frequency division multiplexing of the ZC sequence and the QPSK symbol sequence) and the PAPR of the QPSK DFT-s-OFDM signal when the root index is 1 and 2. It can be seen that the DMRS PAPR is related to the ZC root index, and the PAPR performance when the root index is 2 is worse than the PAPR performance of the data symbol.

[0203] In NR, five formats are defined for the physical uplink control channel (PUCCH), and the PUCCH using format 2 can transmit one or two OFDM symbols. In both single-symbol and double-symbol cases, the DMRS sequence (at this time, the DMRS sequence is a certain QPSK symbol sequence) is frequency-division multiplexed with the data QPSK symbol sequence. The pilot density is 1 / 3, as shown in Figure 6. The PAPR of the signal is high under this design. Therefore, the following scheme is proposed:

[0204] Scheme 1, considering the single-symbol scenario: the DMRS sequence is frequency-division multiplexed with the single-carrier data (such as the DFT result of the QAM symbol sequence), and the DMRS sequence is replaced with, for example, a ZC sequence. In this scenario, the lower the PAPR of the DMRS symbol, the better.

[0205] Scheme 2, considering the double-symbol scenario: both symbols are changed to frequency-division multiplexing of the DMRS sequence and the single-carrier data (such as the DFT result of the QAM symbol sequence), and the DMRS sequence is replaced with, for example, a ZC sequence. Similarly, the lower the PAPR of the DMRS symbol, the better.

[0206] Scheme 3, considering the two-symbol scenario: the first symbol is changed to FDM the DMRS sequence with single carrier data (e.g. DFT result of QAM symbol sequence), while the DMRS sequence is changed to e.g. ZC sequence. The second symbol is changed to data DFT-s-OFDM symbol, without carrying DMRS sequence. It should be understood that in this scheme, the PAPR of the first symbol cannot be higher than the PAPR of the second symbol.

[0207] It should also be understood that in the scenario of PUSCH multi-symbol transmission (i.e. PUSCH occupies at least two symbols) and FDM of DMRS sequence with single carrier data, there is a constraint that the PAPR of DMRS symbol cannot be higher than the PAPR of data symbol. For this purpose, the following scheme is proposed:

[0208] Scheme 4: limit the modulation order of data in DMRS symbol to be less than or equal to the modulation order of data in data symbol.

[0209] For example, the data in DMRS symbol is modulated with QPSK, while the data in data symbol is modulated with 16QAM.

[0210] Scheme 5: in addition to FDM, the DMRS sequence can also be TDM with data.

[0211] Scheme 6: by reducing the power of frequency-divided data, the power of DMRS sequence is increased.

[0212] It should be understood that in the case of given total power, the power proportion allocated to DRMS sequence is 1 / Δ (1 / Δ represents DMRS density), while the power proportion allocated to frequency-divided data is For example, when Δ = 2, the power proportion allocated to DRMS sequence is 1 / 2, while the power proportion allocated to frequency-divided data is 1 / 2. At this time, the per-resource element energy EPRE of frequency-divided data is equal to the per-resource element energy EPRE of DMRS, and the EPRE ratio of the two is 1, or 0 dB. Now the power of frequency-divided data is reduced, and the power of DRMS sequence is increased. For example, when Δ = 2, the power proportion allocated to frequency-divided data is adjusted to 1 / 4 (i.e. reduced by 3 dB), and the power proportion allocated to DRMS sequence is adjusted to 3 / 4. At this time, the per-resource element energy EPRE of frequency-divided data is less than the per-resource element energy EPRE of DMRS, and the EPRE ratio of the two is less than 1.

[0213] 11. Frequency-domain spectral shaping (FDSS) + sequence spreading: FDSS can be understood as a frequency signal S kPerform a windowing process. Mathematically, this can be described by the following formula:

[0214] Where c[i] is the i-th coefficient of the FDSS window function. Mapped to N corresponding to transmission bandwidth SC = On M subcarriers.

[0215] It is important to note that the benefits of performing FDSS are as follows:

[0216] On the one hand, in the integrated sensing and communication (ISAC) scenario, reducing the side lobes of the fuzzy function improves sensing performance.

[0217] On the other hand, it can improve the PAPR performance of DFT-s-OFDM signals, which helps to increase the transmitted signal power and improve coverage.

[0218] Because FDSS makes certain The amplitude (energy) is significantly reduced, causing the corresponding S k [i] Detection / demodulation performance loss. To mitigate / avoid the performance loss caused by FDSS, it is generally necessary to perform S before FDSS. k Sequence expansion is performed, as shown in Figure 8. Figure 8 is a schematic diagram of DFT-s-OFDM signal generation with sequence expansion and FDSS. For an M-length sequence S... k Perform sequence expansion to obtain N sc Long sequences Then perform FDSS to obtain N. sc Long sequences N sc >M. and The relationship is shown in the following formula:

[0219] The sequence expansion factor can be defined as:

[0220] In the embodiments of this application, the above-described sequence expansion factor definition is used for illustrative purposes.

[0221] It should be understood that other definitions of sequence expansion factors may also exist, which can be expressed as:

[0222] It should be understood that the sequence spread factor can also be called the spectral spread factor or the bandwidth spread factor.

[0223] For QAM DFT-s-OFDM or OFDM, considering that the FDSS window function is symmetric, a commonly used sequence expansion method can be represented as:

[0224] In combination with the above formula, it can be seen that the data S k [i], By transmitting through two subcarriers, i.e., increasing a fold of redundancy, to alleviate / reduce the deterioration caused by FDSS to the S k [i] detection / demodulation performance.

[0225] It should be understood that the sequence expansion actually increases the redundancy, which is beneficial to improve the demodulation performance, but the redundant part occupies the bandwidth without transmitting new information (i.e., N sc subcarriers actually only transmit M symbols), thus reducing the spectral efficiency. Among them, there are many ways to sequence expansion, and the application does not limit the way of sequence expansion.

[0226] 12, Roll-off factor / coefficient: generally used to describe the steepness of the Nyquist filter frequency response function with frequency. The roll-off factor / coefficient can reduce the implementation difficulty of the filter, but increases the bandwidth. Among them, the bandwidth beyond 1 / 2T of the Nyquist frequency is called the transition bandwidth, and the roll-off factor / coefficient is defined as the ratio of the transition bandwidth to the Nyquist frequency.

[0227] 13, Tone reservation (TR): tone reservation is also a technique for reducing the PAPR of the transmitted signal, a part of the subcarriers in the transmission bandwidth is used to transmit data, and the remaining part of the subcarriers is called reserved subcarriers. Among them, the reserved subcarriers carry a reserved signal, which functions to reduce the PAPR of the OFDM / DFT-s-OFDM signal corresponding to the data subcarriers.

[0228] Currently, the DMRS symbol can be designed in the manner shown in the example of FIG. 1, i.e., the DMRS sequence and the data use frequency division multiplexing. But it faces the problem of too high PAPR of the DMRS symbol. For example, in the multi-symbol transmission scenario based on DFT-s-OFDM waveform, the PAPR of the DMRS symbol can be higher than the PAPR of the data symbol.

[0229] Based on this, the application provides a communication method, which can ensure that the PAPR of the DMRS symbol is low in the only-DMRS-symbol scenario (for example, the scenarios applicable to the above-mentioned schemes 1, 2 and 5) when the DMRS sequence is generated based on the ZC sequence; and can ensure that the PAPR of the DMRS symbol is not higher than the PAPR of the data symbol in the DMRS-and-data-symbol coexisting scenario (for example, the scenarios applicable to the above-mentioned schemes 3, 4, 5 and 6).

[0230] FIG. 9 is a schematic flowchart of a communication method 900 provided by an embodiment of the application.

[0231] It should be understood that the method shown in FIG. 9 of the application can be executed by the sending-end device and the receiving-end device, and unless otherwise specified, the "receiving-end device" or the "sending-end device" can refer to the receiving-end device or the sending-end device itself, can refer to an apparatus capable of supporting the receiving-end device or the sending-end device to implement the function, or can refer to a component (for example, a chip or a chip system or a circuit) of the receiving-end device or the sending-end device. For the convenience of description, the receiving-end device and the sending-end device are exemplarily described below.

[0232] As shown in FIG. 9, the method at least includes the following steps:

[0233] 901. The sending-end device modulates a first bit stream based on a first modulation scheme to obtain a first data signal.

[0234] For example, in step 901, the sending-end device modulating the first bit stream based on the first modulation scheme to obtain the first data signal can be roughly divided into the following steps: first, the sending-end device modulates the first bit stream based on the first modulation scheme to obtain first data, and then the sending-end device performs DFT on the first data to obtain the first data signal. It should be understood that the above processing mode is only exemplarily described, and the application does not make any limitation in this regard.

[0235] Optionally, the sending-end device can also insert some other data, such as a phase tracking reference signal or a unique word, into the first data. It should be understood that the application does not make any limitation in this regard.

[0236] Further, after the sending-end device obtains the first data signal, the sending-end device can obtain a first composite signal based on the frequency-division multiplexing (FDM) manner between the first data signal and the DMRS sequence. That is to say, the first data signal and the DMRS sequence are located in different frequency domain resources (or referred to as: the first data signal and the DMRS sequence do not overlap in the frequency domain resources occupied). For the convenience of understanding, the frequency-division multiplexing manner is used instead of the FDM manner for description below.

[0237] Exemplarily, in a possible implementation, the sending device can obtain the first composite signal based on frequency division multiplexing manner from the first data signal and the DMRS sequence. That is to say, in this case, the first composite signal is obtained based on frequency division multiplexing manner from the first data signal and the DMRS sequence.

[0238] Exemplarily, in another possible implementation, the sending device can also obtain the first composite signal based on frequency division multiplexing manner from the first data signal, the signal #1 and the DMRS sequence. That is to say, in this case, the first composite signal is obtained based on frequency division multiplexing manner from the first data signal, the DMRS sequence and the first signal (for example, the signal #1).

[0239] It should be noted that, in one case, the signal #1 can be a redundant signal, wherein the redundant signal can be understood as a signal occupying bandwidth but not transmitting new information. Alternatively, in another case, the signal #1 can also be a reserved signal, wherein the reserved signal can be understood as a signal occupying reserved subcarriers. The related description of the redundant signal and the reserved signal can be referred to the prior art, which will not be described here.

[0240] Optionally, in a possible implementation, the above signal #1 can also be generated based on the first data signal and the DMRS sequence.

[0241] Subsequently, after obtaining the first composite signal based on the frequency division multiplexing manner, the first composite signal needs to be processed to obtain the reference signal. For example, the first composite signal can be subjected to subcarrier mapping, IDFT, CP addition and the like to obtain the reference signal. It should be understood that the above processing manner of obtaining the reference signal from the first composite signal is only for illustrative purposes, and the present application does not limit this.

[0242] Optionally, in a possible implementation, before the first composite signal is subjected to subcarrier mapping, IDFT, CP addition and the like, the first composite signal can also be subjected to FDSS processing, and the specific process of the FDSS processing can be referred to the introduction in the prior art.

[0243] It should be understood that, in the embodiments of the present application, the reference signal can also be referred to as a DMRS symbol, wherein the DMRS symbol carries the DMRS sequence and the first data signal, and the DMRS sequence and the first data signal are located in the DMRS symbol in a frequency division multiplexing manner. In other words, the DMRS symbol in the embodiments of the present application can be considered as a time domain symbol of multiplexing the DMRS sequence and the first data signal.

[0244] 902, the sending device modulates the second bit stream based on a second modulation scheme to obtain a second data signal.

[0245] For example, the sending device modulates the second bit stream based on the second modulation scheme to obtain the second data signal can be roughly divided into several steps: first, the sending device modulates the second bit stream based on the second modulation scheme to obtain the second data; then, the sending device performs DFT, subcarrier mapping, CP addition, DAC and other processing modes on the second data to obtain the processed second data signal. It should be understood that the above processing mode is only for illustration, and the present application does not limit this. It should also be understood that in the embodiments of the present application, the second data signal can also be referred to as a data symbol, wherein the data symbol refers to a symbol carrying data. For the sake of simplicity, the following will not be described.

[0246] Optionally, the sending device can also insert some other data in the second data, such as a phase tracking reference signal or a unique word. It should be understood that the present application does not limit this.

[0247] Optionally, in a possible implementation, the sending device can also perform FDSS processing on the frequency domain signal #2 before performing subcarrier mapping on the frequency domain signal #2, wherein the frequency domain signal #2 is obtained by performing DFT processing on the second data. For example, the sending device can perform DFT, FDSS, subcarrier mapping, IDFT and CP addition on the second data in turn to obtain the second data signal.

[0248] Optionally, in a possible implementation, the sending device can also insert the second signal into the frequency domain signal #2 to obtain a second composite signal before performing subcarrier mapping on the frequency domain signal #2, and take the second composite signal as the input of the subcarrier mapping module, wherein the frequency domain signal #2 is obtained by performing DFT processing on the second data.

[0249] It should be noted that inserting the second signal into the frequency domain signal #2 to obtain the second composite signal can be understood as obtaining the second composite signal based on frequency division multiplexing from the frequency domain signal #2 and the second signal. For example, the sending device performs DFT, second signal insertion, subcarrier mapping, IDFT and CP addition on the second data in turn to finally obtain the second data signal.

[0250] Since the second composite signal is obtained based on frequency division multiplexing from the frequency domain signal #2 and the second signal, in another possible implementation, the sending device can also perform subcarrier mapping on the frequency domain signal #2 and the second signal in a subcarrier non-overlapping manner. For example, the sending device first performs DFT on the second data to obtain the frequency domain signal #2, and then performs subcarrier mapping, IDFT and CP addition on the frequency domain signal #2 and the second signal in a subcarrier non-overlapping manner to finally obtain the second data signal.

[0251] Optionally, in a possible implementation, the sending end device can further perform FDSS processing on the second composite signal before performing subcarrier mapping on the second composite signal. For example, the sending end device performs DFT, second signal insertion, FDSS, subcarrier mapping, IDFT, and CP addition on the second data in sequence, and finally obtains the second data signal.

[0252] It should be noted that in one case, the second signal can be a redundant signal, where the redundant signal can be understood as a signal occupying bandwidth but not transmitting new information. Alternatively, in another case, the second signal can also be a reserved signal, where the reserved signal can be understood as a signal occupying reserved subcarriers. The related description of the redundant signal and the reserved signal can be referred to the prior art, which will not be described here.

[0253] Optionally, in a possible implementation, the second signal can be generated based on the frequency domain signal #2.

[0254] It should be understood that the step 902 is an optional step. In the scenario where the DMRS symbol exists and the data symbol does not exist (for example, the above-mentioned mode 1, scheme 2 and scheme 3), the receiving end device does not need to determine the second data signal, that is, the receiving end device does not need to perform the above-mentioned step 902.

[0255] 903, the sending end device sends the reference signal. Correspondingly, the receiving end receives the reference signal.

[0256] For example, the sending end device determines the reference signal in the above-mentioned step 901, and sends the reference signal to the receiving end device.

[0257] Optionally, in the case where the sending end device performs the step 902, that is, the sending end device determines the second data signal in the above-mentioned step 902, the sending end device can further send the second data signal. Correspondingly, the receiving end device receives the second data signal.

[0258] It should be understood that the reference signal includes the first data signal and the DMRS sequence, the DMRS sequence is generated based on the ZC sequence, and the root of the ZC sequence belongs to the first root set (the first root set can be represented as or the set ), the and where the set is introduced in detail in the above technical terms, for example, the includes (N ZC -1) available values of q. In addition, the specific generation method of the DMRS sequence based on the ZC sequence (for example, the above-mentioned formula 1) can be referred to the detailed description in the above technical terms, which will not be described here.

[0259] wherein any root q in the set satisfies a first condition, the first condition comprising: an absolute value of any root q in the set and a first value determined by a period of the ZC sequence and the first parameter is greater than or equal to a second threshold value and less than or equal to a first threshold value. The first threshold value is greater than the second threshold value, and the first threshold value and the second threshold value are both positive numbers.

[0260] As an example, assume that a length of the DMRS sequence is M ZC , a period of the ZC sequence is N ZC , the first parameter is δ, the first value is γ, and any root q in the set satisfies an absolute value of γ determined by N ZC and δ is less than or equal to the first threshold value and greater than or equal to the second threshold value.

[0261] For example, γ satisfies the following equation (2):

[0262] wherein N ZC is a prime number, and N ZC is the largest prime number less than M ZC .

[0263] Optionally, the first parameter is an integer that minimizes the absolute value of the first value, i.e., δ is an integer that minimizes the absolute value of γ.

[0264] For example: N zc = 71, q = 1, δ = 0, and γ = -1; for example: N zc = 71, q = 70, δ = 1, and γ = 1; for example: N zc = 71, q = 2, δ = 1, and γ = 35.

[0265] Assume that a length of the DMRS sequence is 360 (i.e., M ZC = 360), and N ZC = 359. In this case, the size of the set is 358. The DMRS sequence is generated according to the above equation (1). The set PAPR of the OFDM signal (which only carries the DMRS sequence) corresponding to each root index value, and the PAPR (dB) value when CCDF is 0.01 is obtained. The lower (or smaller) the PAPR value is, the better the PAPR is. The higher (or larger) the PAPR value is, the worse the PAPR is. The value of γ corresponding to each root index value is calculated according to the above formula (2). As shown in FIG. 10, the relationship between the PAPR (dB) value when CCDF is 0.01 and |γ| (i.e., the absolute value of γ) is shown. The first threshold is referred to as threshold B (Th.B) and the second threshold is referred to as threshold A (Th.A), where the second threshold is equal to 1. As can be seen from FIG. 10, when the absolute value of γ is greater than or equal to the second threshold and less than or equal to the first threshold, i.e., in the case of the second threshold ≤ |γ| ≤ the first threshold, the PAPR corresponding to the DMRS symbol is low, and the PAPR corresponding to the DMRS symbol is good.

[0266] The following will exemplarily show the values of the first threshold and the second threshold corresponding to a plurality of DMRS sequence lengths (M ZC ) according to Table 1:

[0267] Table 1

[0268] It should be understood that Table 1 above is only an example of the present application, and the specific values of the length of the DMRS sequence and the first threshold and the second threshold are not limited.

[0269] It should also be understood that the specific values of the first threshold and the second threshold are not limited by the present application. The first threshold and the second threshold can be predefined by the system / protocol, or determined by the sending end device itself, or determined by the sending end device and the receiving end device, or determined by other devices and indicated to the sending end device, which is not limited by the present application.

[0270] Next, the values of the first threshold and the second threshold may be related to which parameters will be exemplarily introduced.

[0271] Example 1:

[0272] The values of the first threshold and the second threshold are related to the second value. The second value is related to M ZC and / or N zc .

[0273] Example 1.1, assuming that the second value is the absolute value of the difference between M ZC and N zc , i.e., the second value = (M ZC -N ZC ), or the second value = |NZC -M ZC |。 Wherein, the first threshold value is monotonically non-decreasing with respect to the second value, and the second threshold value is monotonically non-decreasing with respect to the second value.

[0274] For example, when the second value is X1, the first threshold is Y1 and the second threshold is Z1; when the second value is X2, the first threshold is Y2 and the second threshold is Z2. If X1 > X2, then Y1 ≥ Y2 and Z1 ≥ Z2.

[0275] Specifically, when the second value is 1, the second threshold can be 1; when the second value is greater than or equal to 2, the second threshold can be greater than or equal to 2; when the second value is greater than or equal to 2, the second threshold can be 1.

[0276] Assume M ZC =108, and N ZC =107, at which point the second value is 1 (i.e., 108-107=1). Figure 11 shows a simulation diagram of the PAPR (dB) value and |γ| when CCDF is 0.01. Furthermore, assume that M... ZC =96, and N ZC =89, at which point the second value is 7 (i.e., 96-89=7). Figure 12 shows the relationship between PAPR(dB) value and |γ| when CCDF is 0.01.

[0277] Referring to Figures 11 and 12: Assuming the required PAPR (dB) value is 4dB when CCDF is 0.01, for M ZC =108, and N ZC When M = 107, the first threshold can be 16, and the second threshold can be 1; for M ZC =96, and N ZC In the case of 89, the first threshold can be 30, and the second threshold can be 1.

[0278] It can be seen that when the second value is 1, the first threshold is 16 and the second threshold is 1; when the second value is 7, the first threshold is 30 and the second threshold is 1, that is, the second value 7 > 1, the first threshold 30 > 16, and the second threshold 1 = 1.

[0279] Referring to Figures 11 and 12: Assuming the required PAPR (dB) value is 3.5dB when CCDF is 0.01, for M... ZC =108, and N ZC In the case where M = 107, the first threshold can be 15, and the second threshold can be 1; for M ZC =96, and N ZC In the case of 89, the first threshold can be 15 and the second threshold can be 2.

[0280] It can be seen that when the second value is 1, the first threshold is 15 and the second threshold is 1; when the second value is 7, the first threshold is 15 and the second threshold is 2, that is, the second value 7 > 1, the first threshold 15 = 15, and the second threshold 2 > 1.

[0281] Example 1.2, in M ZC With N ZC If the absolute value of the difference is a fixed value, then the second value is M. ZC Or N ZC The first threshold value is monotonically non-decreasing with respect to the second value, and the second threshold value is monotonically non-increasing with respect to the second value.

[0282] For example, when the second value is x1, the first threshold is y1 and the second threshold is z1; when the second value is x2, the first threshold is y2 and the second threshold is z2. If x1 > x2, then y1 ≥ y2 and z1 ≤ z2.

[0283] Suppose that in (M) ZC -N ZC When the value of ) is fixed at 1, such as M ZC =72, N ZC =71, Figure 13 shows a simulation diagram of PAPR (dB) value and |γ| when CCDF is 0.01. For example, M ZC =360, N ZC =359, Figure 14 shows the relationship between PAPR (dB) and |γ| when CCDF is 0.01.

[0284] Referring to Figures 13 and 14: Assuming the required PAPR (dB) value is 4dB when CCDF is 0.01, for M ZC =72, N ZC When M = 71, the first threshold can be 19, and the second threshold can be 1; for M ZC =360, and N ZC In the case of 359, the first threshold can be 53 and the second threshold can be 1.

[0285] It can be seen that in (M) ZC -N ZC When the value of ) is fixed, the second value is M. ZC When the value is 72, the first threshold is 19 and the second threshold is 1; when the second value is M ZC When the value is 360, the first threshold is 53, and the second threshold is 1. That is, the second value 360 ​​> 72, the first threshold 53 > 19, and the second threshold 1 = 1; this second value is N. ZC When the value is 71, the first threshold is 19 and the second threshold is 1; when the second value is NZC = 359, the first threshold value is 53 and the second threshold value is 1, i.e. the second value 359 > 71, the first threshold value 53 > 19, and the second threshold value 1 = 1.

[0286] Further assume that, in the case of (M ZC = 120, N ZC = 113, Fig. 15 shows the simulation diagram of the PAPR (dB) value of CCDF taking 0.01 and |y|, and M ZC = 120, N ZC = 113, Fig. 15 shows the simulation diagram of the PAPR (dB) value of CCDF taking 0.01 and |y|, and M ZC = 300, and N ZC = 293, Fig. 16 shows the relationship between the PAPR (dB) value of CCDF taking 0.01 and |y|.

[0287] In combination with Figs. 15 and 16, it is assumed that the PAPR (dB) value of CCDF taking 0.01 is 3.5 dB. For the case of M ZC = 120, N ZC = 113, the first threshold value can be 21 and the second threshold value can be 2; for the case of M ZC = 300, and N ZC = 293, the first threshold value can be 43 and the second threshold value can be 1.

[0288] It can be seen that, in the case of (M ZC -N ZC ) taking a fixed value, the first threshold value is 21 and the second threshold value is 2 when the second value is M ZC = 120; in the case of the second value being M ZC = 300, the first threshold value is 43 and the second threshold value is 1, i.e. the second value 300 > 120, the first threshold value 43 > 21, and the second threshold value 1 < 2; the first threshold value is 21 and the second threshold value is 2 when the second value is N ZC = 113; in the case of the second value being N ZC = 293, the first threshold value is 43 and the second threshold value is 1, i.e. the second value 293 > 113, the first threshold value 43 > 21, and the second threshold value 1 < 2.

[0289] It should be understood that the example one can be applied to a scenario where only DMRS symbols exist (for example, the scenarios where the above-mentioned scheme 1, scheme 2 and scheme 5 are applicable), and can also be applied to a scenario where DMRS symbols and data symbols exist simultaneously (for example, the scenarios where the above-mentioned scheme 3, scheme 4, scheme 5 and scheme 6 are applicable). In the scenario where only DMRS symbols exist, the PAPR corresponding to the DMRS symbols in the example one is relatively low. In the scenario where DMRS symbols and data symbols exist simultaneously, the PAPR corresponding to the DMRS symbols in the example one is relatively low, and the PAPR corresponding to the DMRS symbols is not higher than the PAPR corresponding to the data symbols (for example, the PAPR corresponding to the second data signal).

[0290] Example two

[0291] The values of the first threshold and the second threshold are related to the first modulation number corresponding to the first data signal.

[0292] Example 2.1, the values of the first threshold and the second threshold are related to the first modulation order. Wherein, the first threshold is monotonically non-decreasing with respect to the increase of the first modulation order, and the second threshold is monotonically non-increasing with respect to the increase of the first modulation order.

[0293] For example, when the first modulation order is M1, the first threshold is X3, and the second threshold is Y3; when the first modulation order is M2, the first threshold is X4, and the second threshold is Y4. If M1

[0294] For example, when the first data signal adopts QPSK modulation (i.e. the first modulation order M1 = 2), the first threshold is X3, and the second threshold is Y3; when the first data signal adopts 16QAM modulation (for example, the first modulation order M2 = 4), the first threshold is X4, and the second threshold is Y4. Wherein, M1

[0295] It should be understood that in the example 2.1, the DMRS sequence is frequency-division multiplexed with the first data signal (for example, the detailed description in the above-mentioned scheme 1 and scheme 2), and the first modulation order is the modulation order corresponding to the first data signal.

[0296] It should be understood that the second example can be applicable to a scenario where only DMRS symbols exist (e.g., the scenario where the above-mentioned schemes 1, 2 and 5 are applicable) and can also be applicable to a scenario where DMRS symbols and data symbols coexist (e.g., the scenario where the above-mentioned schemes 3, 4, 5 and 6 are applicable). In the scenario where only DMRS symbols exist, the PAPR corresponding to the DMRS symbols in the second example is lower. In the scenario where DMRS symbols and data symbols coexist, the PAPR corresponding to the DMRS symbols in the second example is lower, and the PAPR corresponding to the DMRS symbols is not higher than the PAPR corresponding to the data symbols (e.g., the second data signal corresponds to the symbols).

[0297] Example three

[0298] The values of the first threshold and the second threshold are related to the first modulation order corresponding to the first data signal and the second modulation order corresponding to the second data signal.

[0299] In example 3.1, it is assumed that the first modulation order and the second modulation order are the same, and the values of the first threshold and the second threshold are related to the first modulation order (or the second modulation order). The first threshold is monotonically non-decreasing with respect to the increase of the first modulation order (or the second modulation order), and the second threshold is monotonically non-increasing with respect to the increase of the first modulation order (or the second modulation order).

[0300] For example, when the first modulation order (or the second modulation order) is M3, the first threshold is x3, and the second threshold is y3. When the first modulation order (or the second modulation order) is M4, the first threshold is x4, and the second threshold is y4. If M3

[0301] It is assumed that when the first data signal and the second data signal adopt the same modulation mode, for example, both adopt QPSK modulation (i.e., the first modulation order and the second modulation order are the same, M3 = 2), the first threshold is x3, and the second threshold is y3. When the first data signal and the second data signal adopt the same modulation mode, for example, both adopt 16QAM modulation (i.e., the first modulation order and the second modulation order are the same, M4 = 4), the first threshold is x4, and the second threshold is y4. It can be seen that M3 < M4, x3 ≤ x4, and y3 ≥ y4.

[0302] It should be understood that the PAPR of a QPSK DFT-s-OFDM signal is lower than the PAPR of a 16QAM DFT-s-OFDM signal, i.e., the DMRS symbol can have a higher PAPR, so the first threshold can be higher, and the second threshold can be lower.

[0303] Example 3.2, assuming the first modulation order is less than the second modulation order, the third value is the absolute value of the difference between the first modulation order and the second modulation order, the first threshold and the second threshold are related to the third value. Wherein, the first threshold is monotonically non-decreasing with respect to the increase of the third value, and the second threshold is monotonically non-increasing with respect to the increase of the third value.

[0304] For example, when the third value is AM1, the first threshold is X5, and the second threshold is Y5. When the first modulation order is AM2, the first threshold is X6, and the second threshold is Y6. If AM1< AM2, then X5≤ X6, and Y5≥ Y6.

[0305] Assuming that when the modulation mode corresponding to the first modulation order is QPSK modulation, that is, the first modulation order is 2, and the modulation mode corresponding to the second modulation order is 16QAM, that is, the second modulation order is 4, then AM1= 2; when AM1= 2, the first threshold is 15, and the second threshold is 2; when the modulation mode corresponding to the first modulation order is QPSK modulation, that is, the first modulation order is 2, and the modulation mode corresponding to the second modulation order is 64QAM, that is, the second modulation order is 6, then AM2= 4; when AM2= 4, the first threshold is 43, and the second threshold is 1; that is, 2< 4, 15≤ 43, and 2≥ 1.

[0306] It should be understood that the above examples 3.1 and 3.2 apply to the case where the transmitting end device transmits the second data signal, and the receiving end receives the second data signal. For details, please refer to the description of step 902 above, which will not be repeated here. Wherein, the second modulation order is the modulation order corresponding to the second data signal.

[0307] It should also be understood that the above example three can be applied to the scenario where DMRS symbols and data symbols exist at the same time (for example, the scenarios applicable to the above schemes 3, 4, 5 and 6), and the PAPR corresponding to the DMRS symbol in any one of the examples in the above example three is not higher than the PAPR corresponding to the data symbol (for example, the symbol corresponding to the second data signal).

[0308] Example four

[0309] The values of the first threshold and the second threshold are related to the multiplexing mode between the DMRS sequence and the first data signal.

[0310] Example 4.1, the values of the first threshold and the second threshold are related to the multiplexing mode between the DMRS sequence and the first data signal. Wherein, the multiplexing mode includes: the time domain resources occupied by the first data signal and the DMRS sequence overlap, and the frequency domain resources occupied do not overlap (for example, FDM), or the time domain resources occupied by the first data signal and the DMRS sequence do not overlap, and the frequency domain resources occupied do not overlap (for example, FDM and TDM).

[0311] For example, when the multiplexing manner is that the first data signal and the DMRS sequence occupy the time domain resources that overlap and the frequency domain resources that do not overlap, the first threshold is x5 and the second threshold is y5; when the multiplexing manner is that the first data signal and the DMRS sequence occupy the time domain resources that do not overlap and the frequency domain resources that do not overlap, the first threshold is x6 and the second threshold is y6, where x5≤x6 and y5≥y6.

[0312] It should be understood that the fourth example can be applicable to a scenario in which only DMRS symbols exist (for example, the scenarios to which the above-described schemes 1, 2 and 5 are applicable) and can also be applicable to a scenario in which DMRS symbols and data symbols exist simultaneously (for example, the scenarios to which the above-described schemes 3, 4, 5 and 6 are applicable). In the scenario in which only DMRS symbols exist, the PAPR corresponding to the DMRS symbols in the fourth example is relatively low. In the scenario in which DMRS symbols and data symbols exist simultaneously, the PAPR corresponding to the DMRS symbols in the fourth example is relatively low, and the PAPR corresponding to the DMRS symbols is not higher than the PAPR corresponding to the data symbols (for example, the PAPR corresponding to the second data signal).

[0313] Example Five

[0314] The values of the first threshold and the second threshold are related to the ratio between the EPRE corresponding to the first data signal and the EPRE corresponding to the DMRS sequence.

[0315] Example 5.1, the values of the first threshold and the second threshold are related to a fourth value, the fourth value being the ratio between the EPRE corresponding to the first data signal and the EPRE corresponding to the DMRS sequence. The first threshold monotonically does not decrease with the increase of the fourth value, and the second threshold monotonically does not increase with the increase of the fourth value.

[0316] For example, the fourth value includes A1 and A2, when the fourth value is A1, the first threshold is X7 and the second threshold is Y7; when the fourth value is A2, the first threshold is X8 and the second threshold is Y8. If A1

[0317] It should be understood that, in the case of a fixed ZC sequence, the lower the power ratio of the first data signal (that is, the smaller the EPRE), the lower the PAPR of the DMRS symbol. Equivalently, in the case of a smaller EPRE of the first data signal, the first threshold is larger and the second threshold is smaller.

[0318] It should be understood that the fifth example can be applied to a scenario where only DMRS symbols exist (e.g., the scenario where the above-mentioned schemes 1, 2 and 5 are applicable), and can also be applied to a scenario where DMRS symbols and data symbols exist simultaneously (e.g., the scenario where the above-mentioned schemes 3, 4, 5 and 6 are applicable). In the scenario where only DMRS symbols exist, the PAPR corresponding to the DMRS symbols in the fifth example is lower. In the scenario where DMRS symbols and data symbols exist simultaneously, the PAPR corresponding to the DMRS symbols in the fifth example is lower, and the PAPR corresponding to the DMRS symbols is not higher than the PAPR corresponding to the data symbols (e.g., the PAPR corresponding to the second data signal).

[0319] Sixth example

[0320] The first threshold value and the second threshold value are related to at least one of a spectral spreading factor, a proportion of reserved subcarriers, or an absolute value of a window function decay slope of FDSS.

[0321] The spectral spreading factor can also be referred to as a sequence spreading factor, or a bandwidth spreading shadow. For details, refer to the above detailed description of FDSS and sequence spreading.

[0322] The proportion of reserved subcarriers refers to a proportion between the number of subcarriers occupied by signal #1 in the reference signal and the number of subcarriers occupied by the reference signal, and the signal #1 is carried by the reserved subcarriers. For details, refer to the above detailed description of signal #1. Generally, the reserved subcarriers and the data subcarriers do not overlap.

[0323] The signal (e.g., signal #1) carried on the reserved subcarriers can reduce the PAPR of the transmission signal corresponding to the data subcarriers. The greater the proportion of the reserved subcarriers, the better the PAPR.

[0324] The greater the window function decay slope of FDSS, the better the PAPR of the data symbols. The window function decay slope reflects the speed at which the window function coefficient decays from the maximum value to the minimum value. As shown in FIG. 17, three FDSS window functions are shown, which are a truncated RRC with a roll-off factor β = 1 and a truncation factor μ = 0.25, a three-tap filter with a time-domain impulse response of [0.28 1 0.28] (the corresponding FDSS window function corresponds to the frequency response of the filter), and a three-tap filter with a time-domain impulse response of [0.335 1 0.335]. It can be seen that the three-tap filter with a time-domain impulse response of [0.335 1 0.335] corresponds to the FDSS window function with the largest decay slope, and the truncated RRC has the smallest decay slope. The greater the window function decay slope, the better the PAPR.

[0325] Example 6.1, the first threshold and the second threshold are related to a ratio of the spectrum spreading factor or the reserved subcarrier. The first threshold is monotonically non-increasing with the increase of the ratio of the spectrum spreading factor or the reserved subcarrier, and the second threshold is monotonically non-decreasing with the increase of the ratio of the spectrum spreading factor or the reserved subcarrier.

[0326] wherein the ratio of the spectrum spreading factor or the reserved subcarrier includes T1 and T2. If the ratio of the spectrum spreading factor or the reserved subcarrier is T1, the first threshold is x7 and the second threshold is y7; if the ratio of the spectrum spreading factor or the reserved subcarrier is T2, the first threshold is x8 and the second threshold is y8. If T1 < T2, x7 ≥ x8 and y7 ≤ y8.

[0327] Example 6.2, the first threshold and the second threshold are related to an attenuation slope of the FDSS window function. The first threshold is monotonically non-increasing with the increase of the absolute value of the attenuation slope of the FDSS window function, and the second threshold is monotonically non-decreasing with the increase of the absolute value of the attenuation slope of the FDSS window function.

[0328] wherein the absolute value of the attenuation slope of the FDSS window function includes t1 and t2. If the absolute value of the attenuation slope of the FDSS window function is t1, the first threshold is X9 and the second threshold is Y9; if the absolute value of the attenuation slope of the FDSS window function is t2, the first threshold is X10 and the second threshold is Y10. If t1 < t2, X9 ≥ X10 and Y9 ≤ Y10.

[0329] It should be understood that the example six can be applied to a scenario where only DMRS symbols exist (for example, the scenarios where the above-mentioned schemes 1, 2 and 5 are applicable), and can also be applied to a scenario where DMRS symbols and data symbols exist simultaneously (for example, the scenarios where the above-mentioned schemes 3, 4, 5 and 6 are applicable). In the scenario where only DMRS symbols exist, the PAPR corresponding to the DMRS symbols in the example six is relatively low. In the scenario where DMRS symbols and data symbols exist simultaneously, the PAPR corresponding to the DMRS symbols in the example six is relatively low, and the PAPR corresponding to the DMRS symbols is not higher than the PAPR corresponding to the data symbols (for example, the PAPR corresponding to the second data signal).

[0330] It should be noted that the modulation scheme corresponding to the first data signal and the modulation scheme corresponding to the second data signal in the embodiments of the present application can be any one of the following: QPSK modulation, 16-QAM, 64-QAM or 16-PSK, etc. It should be understood that the above is only for illustrative purposes, and the present application is not limited in this regard.

[0331] According to the technical solution, the DMRS sequence is generated based on a ZC sequence, and the root of the ZC sequence is a root in the first root set satisfying the first condition, so that the PAPR corresponding to the DMRS symbol is low. In addition, in the scenario where data symbols and DMRS symbols exist at the same time (for example, the scenario of PUSCH multi-symbol transmission and single-carrier data frequency division multiplexing of the DMRS sequence), the method can realize that the PAPR corresponding to the DMRS symbol is not higher than the PAPR corresponding to the data symbol.

[0332] It should be understood that some optional features in the embodiments of the present application can not depend on other features in some scenarios, or can be combined with other features in some scenarios, without limitation.

[0333] It should also be understood that the solutions in the embodiments of the present application can be reasonably combined, or the solutions in the embodiments of the present application can be reasonably decoupled, and the explanation or description of each term appearing in the embodiments can be mutually referenced or explained in each embodiment, without limitation.

[0334] It should also be understood that the size of various numerical serial numbers in the embodiments of the present application does not mean the order of execution, but is only a distinction for convenience of description, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0335] It should also be understood that some terms in the embodiments of the present application, such as the first modulation scheme, the second modulation scheme, etc., should be understood that the naming does not limit the protection scope of the embodiments of the present application.

[0336] It should also be understood that the methods and operations implemented by the sending end in the above-mentioned method embodiments can also be implemented by the components (such as chips or circuits) of the sending end, and the methods and operations implemented by the receiving end can also be implemented by the components (such as chips or circuits) of the receiving end, without limitation. Corresponding to the methods given in the above-mentioned method embodiments, the embodiments of the present application also provide corresponding communication devices, and the device includes a module for executing the corresponding modules of the above-mentioned method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above-mentioned method embodiments are also applicable to the following device embodiments.

[0337] It should be understood that the sending end and the receiving end can perform part or all of the steps in the above-mentioned embodiments, and these steps or operations are only examples, and the embodiments of the present application can also perform other operations or variations of various operations. In addition, each step can be executed in a different order as presented in the above-mentioned embodiments, and it is possible that not all the operations in the above-mentioned embodiments are executed.

[0338] The communication method provided by the embodiments of the present application is described in detail above in combination with FIG. 9-FIG. 17, and the communication apparatus provided by the embodiments of the present application is described in detail below in combination with FIG. 18-FIG. 20. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments above, and part of the content is not described again for the sake of brevity.

[0339] FIG. 18 is a schematic block diagram of a communication apparatus 1800 provided by the embodiments of the present application. As shown in FIG. 18, the communication apparatus 1800 includes a transceiver unit 1810. The transceiver unit 1810 can implement corresponding communication functions, and the transceiver unit 1810 can also be referred to as a communication interface or a communication unit. Optionally, the communication apparatus 1800 further includes a processing unit 1820 for data processing. The communication apparatus 1800 is configured to implement the functions of the sending-end device and the receiving-end device in the method embodiments shown in FIG. 9-FIG. 17.

[0340] When the communication apparatus 1800 is configured to implement the functions of the sending-end device in the method embodiment shown in FIG. 9, the processing unit 1820 is configured to modulate the first bit stream based on the first modulation scheme to obtain the first data signal. The transceiver unit 1810 is configured to send the reference signal.

[0341] Optionally, the processing unit 1820 is further configured to modulate the second bit stream based on the second modulation scheme to obtain the second data signal. The transceiver unit 1810 is further configured to send the second data signal.

[0342] When the communication apparatus 1800 is configured to implement the functions of the receiving-end device in the method embodiment shown in FIG. 9, the transceiver unit 1810 is configured to receive the reference signal.

[0343] Optionally, the transceiver unit 1810 is further configured to receive the second data signal.

[0344] The DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one of a first root set, any root in the first root set satisfies a first condition, the first condition includes that an absolute value of the any root in the first root set and a first value determined by a period of the ZC sequence and a first parameter is less than or equal to a first threshold value and greater than or equal to a second threshold value, the first threshold value is greater than the second threshold value, the first threshold value and the second threshold value are both positive numbers, and the period of the ZC sequence is a largest prime number less than the length of the DMRS sequence.

[0345] It should be understood that the apparatus 1800 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logic circuitry and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 1800 can be embodied in the form of the sending end and the receiving end in the above-mentioned embodiments, and can be used to execute the processes and / or steps corresponding to the sending end and the receiving end in the above-mentioned method embodiments. Alternatively, the apparatus 1800 can be embodied in the form of the sending end and the receiving end in the above-mentioned embodiments, and can be used to execute the processes and / or steps corresponding to the sending end and the receiving end in the above-mentioned method embodiments. To avoid repetition, details are not described here.

[0346] The apparatus 1800 of each of the above-mentioned schemes has the function of implementing the corresponding steps performed by the sending end and the receiving end in the above-mentioned methods, or the apparatus 1800 of each of the above-mentioned schemes has the function of implementing the corresponding steps performed by the sending end and the receiving end in the above-mentioned methods. The function can be implemented by hardware or corresponding software executed by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiving operation and the related processing operation in each method embodiment.

[0347] In addition, the transceiver unit 1810 can also be a transceiver circuit (for example, it can include a receiving circuit and a sending circuit), and the processing unit 1820 can be a processing circuit.

[0348] It should be noted that the apparatus in FIG. 18 can be a network element or a device in the above-mentioned embodiments, or a chip or a chip system, for example, a system on chip (SoC). The transceiver unit can be an input / output circuit, a communication interface; and the processing unit can be a processor or a microprocessor integrated on the chip or an integrated circuit. Here, no limitation is made.

[0349] As shown in FIG. 19, another communication apparatus 1900 is provided in embodiments of the present application. The apparatus 1900 includes a processor 1910 coupled with a memory 1920 for storing computer programs or instructions and / or data, the processor 1910 being configured to execute the computer programs or instructions stored in the memory 1920 or read the data stored in the memory 1920 to perform the methods in the above method embodiments.

[0350] When the communication apparatus 1900 is configured to implement the methods shown in FIGs. 9-17, the processor 1910 is configured to implement the functions of the processing unit 1020 described above.

[0351] Optionally, the processor 1910 is one or more.

[0352] Optionally, the memory 1920 is one or more.

[0353] Optionally, the memory 1920 is integrated with the processor 1910 or is separately arranged.

[0354] Optionally, as shown in FIG. 19, the apparatus 1900 further includes a transceiver 1930 configured to receive and / or send signals. For example, the processor 1910 is configured to control the transceiver 1930 to receive and / or send signals.

[0355] When the communication apparatus 1900 is configured to implement the methods shown in FIGs. 9-17, the transceiver 1930 is configured to implement the functions of the transceiving unit 1010 described above.

[0356] For example, the processor 1910 is configured to execute the computer programs or instructions stored in the memory 1920 to implement the related operations of the sending end and the receiving end in the above method embodiments. For example, the method of the sending end device in any one of the embodiments shown in FIGs. 9-17, or the method of the receiving end device in any one of the embodiments shown in FIGs. 9-17.

[0357] It should be understood that the processor mentioned in embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0358] It should also be understood that the memory referred to in the embodiments of the present application can be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0359] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated in the processor.

[0360] It should also be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0361] As shown in FIG. 20, the chip system 2000 provided by the embodiments of the present application. The chip system 2000 (or also can be called processing system) includes a logic circuit 2010 and an input / output interface 2020. It should be understood that the chip system 2000 can be installed in the communication device 1900 described above, or in other words, the communication device 1900 described above can also include the chip system 2000.

[0362] The logic circuit 2010 can be a processing circuit in the chip system 2000. The logic circuit 2010 can be coupled to a storage unit, and invoke instructions in the storage unit, so that the chip system 2000 can implement the methods and functions of the embodiments of the present application. The input / output interface 2020 can be an input / output circuit in the chip system 2000, and output information processed by the chip system 2000, or input data or signaling information to be processed by the chip system 2000.

[0363] As an option, the chip system 2000 is configured to implement the operations performed by the sending end and the receiving end in the above method embodiments.

[0364] For example, the logic circuit 2010 is configured to implement the operations related to processing of the sending end device and the receiving end device in the above method embodiments, i.e., the logic circuit 2010 is configured to implement the functions of the processing unit 1820 in the above embodiments; the input / output interface 2020 is configured to implement the operations related to sending and / or receiving of the sending end device and the receiving end device in the above method embodiments, i.e., the input / output interface 2020 is configured to implement the functions of the transceiver unit 1810 in the above embodiments.

[0365] The embodiments of the present application also provide a computer readable storage medium, which stores computer instructions for implementing the methods performed by the sending end device and the receiving end device in the above method embodiments.

[0366] For example, the computer program is executed by a computer, so that the computer can implement the methods performed by the sending end device and the receiving end device in the above method embodiments.

[0367] The embodiments of the present application also provide a computer program product, which contains instructions, and the instructions are executed by a computer to implement the methods performed by the sending end device and the receiving end device in the above method embodiments.

[0368] The explanations and advantages of the related contents in any of the above apparatuses can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0369] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. For example, the apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, apparatuses or units, and can be electrical, mechanical or other forms.

[0370] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present application can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0371] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, apparatus and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0372] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0373] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit.

[0374] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0375] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A communication method characterized by comprising: The method comprises: modulating a first bit stream based on a first modulation scheme to obtain a first data signal; sending a reference signal, the reference signal comprising the first data signal and a demodulation reference signal (DMRS) sequence, the first data signal and the DMRS sequence not occupying the same frequency domain resource; wherein the DMRS sequence is generated based on a ZC sequence, and a root of the ZC sequence is one root in a first root set, any root in the first root set satisfying a first condition, the first condition comprising: an absolute value of a first value being less than or equal to a first threshold value and greater than or equal to a second threshold value, the first value being determined based on a root in the first root set, a period of the ZC sequence and a first parameter, the first threshold value being greater than the second threshold value, the first threshold value and the second threshold value both being positive numbers, the period of the ZC sequence being a largest prime number less than a length of the DMRS sequence. The method of claim 1, wherein The method further comprises: modulating a second bit stream based on a second modulation scheme to obtain a second data signal; sending the second data signal, the second data signal and the reference signal not occupying the same time domain resource. The method according to claim 1 or 2, characterized in that The first parameter is an integer that minimizes the absolute value of the first value. The method according to any one of claims 1 to 3, characterized in that The first threshold value and the second threshold value are related to a second value, the second value being related to the period of the ZC sequence and / or the length of the DMRS sequence. The method according to claim 4, characterized in that The second value is an absolute value of a difference between the length of the DMRS sequence and the period of the ZC sequence, wherein the second value comprises X1 and X2, the first threshold value corresponding to the X1 being Y1, the second threshold value corresponding to the X1 being Z1, the first threshold value corresponding to the X2 being Y2, the second threshold value corresponding to the X2 being Z2, if X1 is greater than X2, Y1 is greater than or equal to Y2, and Z1 is greater than or equal to Z2. The method of claim 5, wherein: when the second value is equal to 1, the second threshold value is equal to 1; when the second value is greater than or equal to 2, the second threshold value is greater than or equal to 2. The method according to claim 4, characterized in that The difference between the length of the DMRS sequence and the period of the ZC sequence is a fixed value, and the second value is the period of the ZC sequence or the length of the DMRS sequence, wherein the second value comprises x1 and x2, the first threshold value corresponding to the x1 being y1, the second threshold value corresponding to the x1 being z1, the first threshold value corresponding to the x2 being y2, the second threshold value corresponding to the x2 being z2. The method of claim 7, wherein if x1 is greater than x2, y1 is greater than or equal to y2, and z1 is less than or equal to z2. The method according to any one of claims 1 to 8, characterized in that The first threshold value and the second threshold value are related to a modulation order of the first modulation scheme, wherein when the first modulation order is M1, the first threshold value is X3 and the second threshold value is Y3; when the first modulation order is M2, the first threshold value is X4 and the second threshold value is Y4. The method of claim 9, wherein if M1 is less than M2, X3 is less than or equal to X4, and Y3 is greater than or equal to Y4. The method according to any one of claims 1 to 9, characterized in that The first threshold value and the second threshold value are related to a first modulation order corresponding to the first data signal and a second modulation order corresponding to the second data signal. The method of claim 11, wherein The first modulation order is the same as the second modulation order, the first modulation order includes M3 and M4, the first threshold value corresponding to the M3 is x3, the second threshold value corresponding to the M3 is y3, the first threshold value corresponding to the M4 is x4, and the second threshold value corresponding to the M4 is y4. If the M3 is less than the M4, the x3 is less than or equal to the x4, and the y3 is greater than or equal to the y4. The method of claim 11, wherein The first threshold value and the second threshold value are related to a third value, the third value is an absolute value of a difference between the first modulation order and the second modulation order, and the first modulation order is less than the second modulation order. The third value includes ΔM1 and ΔM2, the first threshold value corresponding to the ΔM1 is X5, the second threshold value corresponding to the ΔM1 is Y5, the first threshold value corresponding to the ΔM2 is X6, and the second threshold value corresponding to the ΔM2 is Y6. If the ΔM1 is less than the ΔM2, the X5 is less than or equal to the X6, and the Y5 is greater than or equal to the Y6. The method according to any one of claims 1 to 13, characterized in that The first threshold value and the second threshold value are related to a multiplexing mode between the DMRS sequence and the first data signal, the multiplexing mode includes that time domain resources occupied by the first data signal and the DMRS sequence overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, or time domain resources occupied by the first data signal and the DMRS sequence do not overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap. When the multiplexing mode is that time domain resources occupied by the first data signal and the DMRS sequence overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, the first threshold value is x5, and the second threshold value is y5. When the multiplexing mode is that time domain resources occupied by the first data signal and the DMRS sequence do not overlap, and frequency domain resources occupied by the first data signal and the DMRS sequence do not overlap, the first threshold value is x6, and the second threshold value is y6. The X5 is less than or equal to the X6, and the Y5 is greater than or equal to the Y6. The method according to any one of claims 1 to 14, characterized in that The first threshold value and the second threshold value are related to a fourth value, the fourth value is a ratio of an energy per resource element EPRE corresponding to the first data signal to an EPRE corresponding to the DMRS sequence. The fourth value includes A1 and A2, the first threshold value corresponding to the A1 is X7, the second threshold value corresponding to the A1 is Y7, the first threshold value corresponding to the A2 is X8, and the second threshold value corresponding to the A2 is Y8. If the A1 is less than the A2, the X7 is greater than or equal to the X8, and the Y7 is less than or equal to the Y8. The method according to any one of claims 1 to 15, characterized in that The first threshold value and the second threshold value are related to at least one of a spectrum spreading factor, a proportion of reserved subcarriers, or a window function attenuation slope of frequency domain spectrum shaping FDSS. The proportion of the reserved subcarriers refers to a proportion between a number of subcarriers occupied by a first signal in the reference signal and a number of subcarriers occupied by the reference signal, and the first signal is carried by the reserved subcarriers. The method of claim 16, wherein The spectrum spreading factor or the proportion of the reserved subcarriers comprises T1 and T2, the first threshold value corresponding to the T1 is x7, the second threshold value corresponding to the T1 is y7, the first threshold value corresponding to the T2 is x8, the second threshold value corresponding to the T2 is y8, If the T1 is less than the T2, the x7 is greater than or equal to the x8, and the y7 is less than or equal to the y8. The method of claim 16, wherein The absolute value of the attenuation slope of the FDSS window function comprises t1 and t2, the first threshold value corresponding to the t1 is X9, the second threshold value corresponding to the t1 is Y9, the first threshold value corresponding to the t2 is X10, the second threshold value corresponding to the t2 is Y10, If the t1 is less than the t2, the X9 is greater than or equal to the X10, and the Y9 is less than or equal to the Y10. A communication device, characterized by Comprise: A processor configured to execute a computer program stored in a memory to cause the apparatus to perform the method of any one of claims 1 to 18. The communication apparatus according to claim 19, characterized in that, Further comprising the memory. A chip characterized by A processor and a memory coupled to the processor, the memory configured to store a computer program, and the processor configured to execute the computer program stored in the memory to implement the method of any one of claims 1 to 18. The chip according to claim 21, wherein Further comprising the memory. A computer readable storage medium having stored thereon computer programs or instructions, characterized in that, The computer program or instructions, when executed by a processor, cause the method of any one of claims 1 to 18 to be performed. A computer program product comprising instructions, characterized in that When it is running on a computer, it causes the method of any one of claims 1 to 18 to be performed.

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