Reference signal transmission method and apparatus, communication node, and storage medium

Abstract

The application provides a reference signal transmission method and device, a communication node and a storage medium. The method transmits a first reference signal through the first H symbols in the time domain of a physical resource block, wherein H is greater than or equal to 2; and transmits a second reference signal through the last T symbols in the time domain of the physical resource block, wherein T is greater than or equal to H.

Description

TECHNICAL FIELD

[0001] The present application relates to a wireless communication network, for example to a reference signal transmission method, apparatus, communication node and storage medium. BACKGROUND

[0002] Long Term Evolution (LTE) adopts Orthogonal Frequency Division Multiplexing (OFDM) technology, and uses time-frequency resources composed of subcarriers and OFDM symbols to form wireless physical time-frequency resources of the LTE system. In the OFDM technology, the problem of multipath time delay of the CP-OFDM system can be well solved by adding a Cyclic Prefix (CP), but because the out-of-band leakage of the CP-OFDM spectrum is relatively large, the CP-OFDM is relatively sensitive to the frequency offset and time offset between adjacent subbands, which can easily cause interference between subbands. At present, the LTE system uses a guard interval in the frequency domain, but this reduces the spectral efficiency, so some new technologies need to be used to suppress the out-of-band leakage. With the increase of the carrier frequency in the terahertz scenario, the phase noise becomes larger, and the design of the Phase Tracking Reference Signal (PTRS) in the existing standard protocol cannot meet the demand of estimating a larger phase noise in the terahertz scenario. SUMMARY

[0003] The present application provides a reference signal transmission method, apparatus, communication node and storage medium to meet the demand of estimating phase noise and improve the demodulation performance of the receiving end.

[0004] The present application provides a reference signal transmission method, apparatus, communication node and storage medium to meet the demand of estimating phase noise and improve the demodulation performance of the receiving end.

[0005] The first reference signal is transmitted through the first H symbols in the time domain of the physical resource block, where H is greater than or equal to 2;

[0006] The second reference signal is transmitted through the last T symbols in the time domain of the physical resource block, where T is greater than or equal to H.

[0007] The present application also provides a reference signal transmission apparatus, comprising:

[0008] The first transmission module is configured to transmit the first reference signal through the first H symbols in the time domain of the physical resource block, where H is greater than or equal to 2;

[0009] The second transmission module is configured to transmit the second reference signal through the last T symbols in the time domain of the physical resource block, where T is greater than or equal to H.

[0010] The embodiment of the present application further provides a communication node, comprising:

[0011] one or more processors;

[0012] a storage device, configured to store one or more programs;

[0013] When the one or more programs are executed by the one or more processors, the one or more processors implement the reference signal transmission method described above.

[0014] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the program is executed by a processor to implement the reference signal transmission method described above. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 a flow chart of a reference signal transmission method provided by an embodiment;

[0016] Figure 2 a schematic diagram of transmitting a reference signal through a physical resource block provided by an embodiment;

[0017] Figure 3 a schematic diagram of transmitting a reference signal through a physical resource block provided by another embodiment;

[0018] Figure 4 a schematic diagram of transmitting a reference signal through a physical resource block provided by still another embodiment;

[0019] Figure 5 a schematic diagram of transmitting a reference signal through a physical resource block provided by yet another embodiment;

[0020] Figure 6 a schematic diagram of transmitting a reference signal through a physical resource block provided by yet another embodiment;

[0021] Figure 7 a schematic diagram of transmitting a reference signal through a physical resource block provided by yet another embodiment;

[0022] Figure 8 a schematic diagram of modulating M i symbols in a time domain in a physical resource block provided by an embodiment;

[0023] Figure 9 a schematic diagram of superimposing time domain data sequences of M i symbols provided by an embodiment;

[0024] Figure 10 a schematic diagram of a waveform function provided by an embodiment;

[0025] Figure 11A structural schematic diagram of a reference signal transmission device provided by an embodiment is shown in the figure.

[0026] Figure 12 A hardware structural schematic diagram of a communication node provided by an embodiment is shown in the figure. DETAILED DESCRIPTION

[0027] The present application will be described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict. In addition, it should be noted that only parts related to the present application are shown in the drawings for convenience of description, not all structures.

[0028] In the embodiments of the present application, a reference signal transmission method is provided, which can be applied to a communication node, which can be a base station, an access point (AP), a transmission receive point (TRP), a user terminal (UE), etc. For example, the UE is a sending end of the reference signal, which transmits a first reference signal by using the first H (H≥2) symbols of each physical resource block and transmits a second reference signal by using the last T (T≥H) symbols of each physical resource block, and the base station is a receiving end of the reference signal, which receives the corresponding reference signal by using the first H symbols and the last T symbols of each physical resource block. The first reference signal and the second reference signal can be used for phase noise estimation and compensation, frequency offset correction, auxiliary channel estimation, and auxiliary synchronization of the receiving end, to meet the estimation requirement of the phase noise, and thus improve the demodulation performance of the receiving end.

[0029] Figure 1 A flowchart of a reference signal transmission method provided by an embodiment is shown in the figure. The method can be applied to a communication node. As shown in the figure, the method provided by the embodiment includes steps 110 and 120. Figure 1

[0030] In step 110, a first reference signal is transmitted by using the first H symbols in the time domain of the physical resource block, where H is greater than or equal to 2.

[0031] In step 120, a second reference signal is transmitted by using the last T symbols in the time domain of the physical resource block, where T is greater than or equal to H.

[0032] ​In the embodiment, the first reference signal is transmitted through the first H symbols in the time domain of the physical resource block, and the second reference signal is transmitted through the last T symbols in the time domain of the physical resource block. The physical resource block is a resource unit composed of a plurality of symbols in the time domain and a plurality of subcarriers in the frequency domain, and the symbol refers to an OFDM symbol. On this basis, the sending end can provide more accurate information for the receiving end, and the receiving end can perform phase noise estimation and compensation, frequency offset correction, channel estimation, synchronization and the like with the assistance of the first reference signal and the second reference signal, thereby improving the demodulation performance of the receiving end.

[0033] In an embodiment, the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next adjacent physical resource block in the time domain.

[0034] In the embodiment, the first reference signal is transmitted through the first H symbols of the physical resource block, and the first reference signal transmitted through the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next adjacent physical resource block in the time domain, which can resist uplink and downlink interference.

[0035] In an embodiment, the second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next adjacent physical resource block in the time domain.

[0036] In the embodiment, the second reference signal is transmitted through the last T symbols of the physical resource block, and the second reference signal transmitted through the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next adjacent physical resource block in the time domain, which can resist multipath delay. In this case, there are at least two last T symbols of the physical resource blocks adjacent in the time domain, which transmit the same second reference signal, which is equivalent to adding a cyclic prefix in the unit of symbol in the continuous physical resource, that is, the symbol where the last second reference signal of a physical resource block is located can be used as the cyclic prefix of the next adjacent physical resource block in the time domain. In this case, the multipath components of the previous OFDM symbol do not cause interference to the next OFDM symbol, which can effectively resist multipath delay. It should be noted that the transmission of CP in the CP-OFDM system needs to occupy the frequency spectrum resource, and the CP needs to be removed during demodulation of the receiving end, so that the frequency spectrum is wasted. The method of the embodiment does not need to additionally increase the guard interval or the cyclic prefix between the adjacent physical resource blocks, which can save the transmission overhead and improve the frequency spectrum utilization rate.

[0037] In one embodiment, the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next adjacent physical resource block in the time domain. The second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next adjacent physical resource block in the time domain.

[0038] In this embodiment, the first reference signal is transmitted using the first H symbols of the physical resource block, and the first reference signal transmitted on the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next adjacent physical resource block in the time domain, which can resist uplink and downlink interference. The second reference signal is transmitted using the last T symbols of the physical resource block, and the second reference signal transmitted on the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next adjacent physical resource block in the time domain. That is, the last reference signal symbol of the physical resource block can be regarded as the cyclic prefix of the next adjacent physical resource block in the time domain, thereby overcoming the multipath delay problem and improving the demodulation performance of the receiver. A first reference signal is transmitted using the first H symbols of a physical resource block, and a second reference signal is transmitted using the last T symbols. The first reference signal transmitted in the first H symbols of this physical resource block is identical to the reference signal corresponding to the first H symbols of the next adjacent physical resource block in the time domain, and the second reference signal transmitted in the last T symbols of this physical resource block is identical to the reference signal corresponding to the last T symbols of the next adjacent physical resource block in the time domain. This increases the continuity of amplitude and phase between adjacent physical resource blocks, thereby reducing out-of-band leakage. The first and second reference signals can be used by the receiver for phase noise estimation and compensation, frequency offset correction, auxiliary channel estimation, and auxiliary synchronization, thereby improving the demodulation performance of the receiver.

[0039] In one embodiment, each time slot contains L physical resource blocks, where L is greater than or equal to 1; the i-th physical resource block in each time slot is composed of M in the time domain. i K in the symbol and frequency domain i It consists of 1 subcarrier, of which M i K is greater than or equal to the sum of T and H. i Greater than or equal to 1, where i is a positive integer less than or equal to L.

[0040] In this embodiment, each time slot contains at least one physical resource block, and each physical resource block is composed of M in the time domain. i K in the symbol and frequency domain i Composed of M subcarriers, i ≥H+T. For the i-th physical resource block, in M i Of the 3 symbols, the first H symbols are used to transmit the first reference signal, and the last T symbols are used to transmit the second reference signal. If there are any remaining symbols besides the first H symbols and the last T symbols, then the remaining M symbols...i The first reference signal transmitted on the H symbols before the ith physical resource block is the same as the reference signal corresponding to the H symbols before the next adjacent physical resource block in the time domain, i.e., the same as the first reference signal transmitted on the H symbols before the (i+1)th physical resource block; the second reference signal transmitted on the T symbols after the ith physical resource block is the same as the reference signal corresponding to the T symbols after the next adjacent physical resource block in the time domain, i.e., the same as the second reference signal transmitted on the T symbols after the (i+1)th physical resource block. Assuming that each time slot contains only one physical resource block, the first reference signal transmitted on the H symbols before the physical resource block is the same as the first reference signal transmitted on the H symbols before the physical resource block contained in the next adjacent time slot in the time domain, and the second reference signal transmitted on the T symbols after the physical resource block is the same as the second reference signal transmitted on the T symbols after the physical resource block contained in the next adjacent time slot in the time domain. The number of symbols contained in each physical resource block can be the same or different.

[0041] In an embodiment, of the L physical resource blocks in each time slot, the number of symbols contained in P physical resource blocks is equal to the sum of T and H; the number of symbols contained in L-P physical resource blocks is greater than the sum of T and H; wherein P is greater than or equal to 0 and P is less than or equal to L.

[0042] In this embodiment, each time slot contains L physical resource blocks, wherein P physical resource blocks each contain H+T symbols, i.e., there are no remaining symbols available for transmission of related information, and these P physical resource blocks are reference signal blocks; L-P physical resource blocks each contain more than H+T symbols, i.e., there are remaining symbols available for transmission of related information, and these P physical resource blocks are data blocks.

[0043] In an embodiment, when P is equal to 0, the first H symbols in the time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and the symbols other than the first H symbols and the last T symbols are used to transmit related information.

[0044] When P is equal to L, the first H symbols in the time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and each physical resource block does not contain related information.

[0045] In case that P is greater than 0 and P is less than L, the first H symbols in time domain of each physical resource block in P physical resource blocks in each time slot are used for transmitting the first reference signal, the last T symbols are used for transmitting the second reference signal, and each physical resource block does not contain relevant information, the first H symbols in time domain of each physical resource block in L-P physical resource blocks in each time slot are used for transmitting the first reference signal, the last T symbols are used for transmitting the second reference signal, and the symbols other than the first H symbols and the last T symbols are used for transmitting the relevant information;

[0046] The relevant information includes at least one of service data and a third reference signal.

[0047] Figure 2 A schematic diagram for transmitting reference signals through physical resource blocks is provided for an embodiment. As shown in Figure 2 each physical resource block contains M i =4 symbols (i=1, 2), wherein the first H=2 symbols (indicated by the hatched area) are used for transmitting the first reference signal, the last T=2 symbols (indicated by the dotted area) are used for transmitting the second reference signal, and M i =T+H, T=H. The first reference signal on the first H symbols of a physical resource block is the same as the second reference signal on the first H symbols of the next adjacent physical resource block in time domain; the reference signal on the last T symbols of the physical resource block is the same as the reference signal on the last T symbols of the next adjacent physical resource block in time domain. Each physical resource block is a reference signal block, and no other relevant information is transmitted.

[0048] Figure 3 A schematic diagram for transmitting reference signals through physical resource blocks is provided for another embodiment. As shown in Figure 3 each physical resource block contains M i =6 symbols (i=1, 2), wherein the first H=2 symbols (indicated by the hatched area) are used for transmitting the first reference signal, the last T=2 symbols (indicated by the dotted area) are used for transmitting the second reference signal, and the M i -T-H=2 symbols (indicated by the square area without filling) in the middle can be used for transmitting other relevant information, such as service data, M i >T+H, T=H. The first reference signal on the first H symbols of a physical resource block is the same as the second reference signal on the first H symbols of the next adjacent physical resource block in time domain; the reference signal on the last T symbols of the physical resource block is the same as the reference signal on the last T symbols of the next adjacent physical resource block in time domain. Each physical resource block is a data block, i.e., both reference signals and service data are transmitted.

[0049] Figure 4This is a schematic diagram illustrating the transmission of reference signals via physical resource blocks, as provided in another embodiment. Figure 4 As shown, for the i=1th physical resource block, there are M1=9 symbols, of which the first H=2 symbols (shown in the slashed area) are used to transmit the first reference signal, and the last T=3 symbols (shown in the dotted area) are used to transmit the second reference signal, M1>T+H, T>H; for the i=2th physical resource block, there are M2=9 symbols, of which the first H=2 symbols (shown in the slashed area) are used to transmit the first reference signal, and the last T'=5 symbols (shown in the dotted area) are used to transmit the second reference signal, M2>T'+H, T'>H; the first reference signal transmitted by the first 2 symbols of the first physical resource block is the same as the first reference signal transmitted by the first 2 symbols of the next adjacent physical resource block in the time domain, and the second reference signal transmitted by the last 3 symbols of the first physical resource block is the same as the second reference signal transmitted by the last 3 symbols of the next adjacent physical resource block in the time domain. In the second physical resource block, the four symbols other than the first two and last three can be used to transmit other related information, such as service data (shown in the unfilled box area) and a third reference signal. The last five symbols in the second physical resource block transmit the reference signal, which can provide a longer cyclic prefix for the next adjacent physical resource block in the time domain, thus overcoming the multipath delay problem to a greater extent. In this embodiment, the first reference signal on the first H symbols of the physical resource block is the same as the second reference signal on the first H symbols of the next adjacent physical resource block in the time domain; the reference signal on the last T symbols of the physical resource block is the same as the reference signal on the last T symbols of the next adjacent physical resource block in the time domain. Each physical resource block is a data block, that is, it transmits both reference signals and service data.

[0050] Figure 5 This is a schematic diagram illustrating the transmission of reference signals via physical resource blocks, as provided in yet another embodiment. Figure 5As shown, for the i = 1thphysical resource block, it contains M1= 5 symbols, in which the first H = 2 symbols (shown by the diagonal area) are used to transmit the first reference signal, the last T = 3 symbols (shown by the dotted area) are used to transmit the second reference signal, M1= T + H, T > H; for the i = 2thphysical resource block, it contains M2= 10 symbols, in which the first H = 2 symbols (shown by the diagonal area) are used to transmit the first reference signal, the last T = 3 symbols (shown by the dotted area) are used to transmit the second reference signal, and the middle M2-T-H = 5 symbols (shown by the square area without filling) can be used to transmit other related information, such as service data, M2> T + H, T > H. The first reference signal transmitted on the first H symbols of the physical resource block is the same as the first reference signal transmitted on the first H symbols of the next adjacent physical resource block in the time domain; the second reference signal transmitted on the last T symbols of the physical resource block is the same as the second reference signal transmitted on the last T symbols of the next adjacent physical resource block in the time domain. The first physical resource block is a reference signal block, and the second physical resource block is a data block.

[0051] In an embodiment, for two adjacent physical resource blocks in the time domain, the length of the latter is an integer multiple of the length of the former, for example Figure 5 In which the length of the second physical resource block is twice the length of the first physical resource block.

[0052] Figure 6 A schematic diagram for transmitting reference signals through physical resource blocks is provided for yet another embodiment. As shown, Figure 6 A time slot contains L = 1 physical resource block. A physical resource block (or a time slot) contains M i = 14 symbols (i = 1), the first reference signal is transmitted on the first H = 2 symbols in the time domain, the second reference signal is transmitted on the last T = 3 symbols in the time domain, and other related information, such as service data, is transmitted on the middle M i -T-H = 9 symbols in the time domain. The first reference signal on the first H symbols of each time slot is the same as the first reference signal on the first H symbols of the next adjacent time slot in the time domain. The second reference signal on the last T symbols of each time slot is the same as the second reference signal on the last T symbols of the next adjacent time slot in the time domain, M1> T + H, T > H.

[0053] Figure 7 A schematic diagram for transmitting reference signals through physical resource blocks is provided for yet another embodiment. As shown, Figure 7 In a time slot, it contains L physical resource blocks, in which P physical resource blocks contain T + H symbols, and L - P physical resource blocks contain more than T + H symbols, L ≥ P ≥ 0.Figure 7 In a given P physical resource block, each block contains T+H = 5 symbols. The first H = 2 symbols of the P physical resource blocks transmit the first reference signal, and the last T = 3 symbols of the P physical resource blocks transmit the second reference signal. Therefore, the P physical resource blocks are reference signal blocks. In a given LP physical resource block, each block contains more than T+H symbols. The first H = 2 symbols of the LP physical resource blocks transmit the first reference signal, and the last T = 3 symbols of the LP physical resource blocks transmit the second reference signal. The remaining M symbols... i -TH symbols transmit other related information, such as service data, and LP physical resource blocks are data blocks. The first reference signal on the first 2 (H=2) symbols of the L physical resource blocks is the same, and the second reference signal on the last 3 (T=3) symbols of the L physical resource blocks is the same. Some physical resource blocks of P physical resource blocks are placed at the beginning of the time slot, and the remaining physical resource blocks are placed at the end of the time slot. LP physical resource blocks can be placed in the middle of the time slot.

[0054] In one embodiment, it further includes:

[0055] Step 1010: Perform Inverse Fast Fourier Transform (IFFT) on the frequency domain data of each symbol in the physical resource block to obtain the oversampled time domain data of each symbol;

[0056] Step 1020: Modulate the oversampled time-domain data of each symbol using a waveform function, wherein the length of the independent variable interval of the waveform function is the product of N and T1, and the length of the time-domain data sequence of each modulated symbol is the product of N and T1, where N is a real number greater than 1 and T1 is a positive number;

[0057] Step 1030: Delay the temporal data sequence of each modulated symbol by T1 based on the temporal data sequence of the previous adjacent symbol, so that the interval between adjacent symbols in the physical resource block is T1, and then superimpose the temporal data sequences of each delayed symbol.

[0058] Figure 8 One embodiment provides M in the time domain of physical resource blocks. i A schematic diagram of modulation of symbols.

[0059] like Figure 8 As shown, each horizontal line represents a subcarrier. Solid lines indicate that the subcarrier carries data, while dashed lines indicate that the subcarrier does not carry data, which is equivalent to the subcarrier carrying zero data. In the physical resource block, M in the time domain... iZero data is added on the two sides of the frequency domain data of one symbol respectively, so that over-sampling time domain data can be obtained after IFFT operation, and then M i symbols corresponding to the length of N x T1time domain data sequence, and then the time domain data sequence of each symbol after modulation is delayed (or staggered) T1on the basis of the time domain data sequence of the adjacent previous symbol and then superimposed.

[0060] Figure 9 The schematic diagram of the time domain data sequence superposition of M i symbols provided by an embodiment.

[0061] In this embodiment, the physical resource block contains M i = 14 symbols in the time domain, the first H = 2 symbols of the 14 symbols transmit the first reference signal, the last T = 3 symbols transmit the second reference signal, and the M i -H-T = 9 symbols transmit service data. The reciprocal of the subcarrier spacing of the 14 symbols is T0.

[0062] The five boxes of the first row (indicated by the diagonal area) represent the time domain data sequence of the first symbol (obtained by waveform modulation of the time domain data on the first symbol); the five boxes of the second row (indicated by the diagonal area) represent the time domain data sequence of the second symbol (obtained by waveform modulation of the time domain data on the second symbol), and the time domain data sequence of the second symbol is delayed by T1compared to the time domain data sequence of the first symbol; the five boxes of the third row (indicated by the no-filled area) represent the time domain data sequence of the third symbol (obtained by waveform modulation of the time domain data on the third symbol), and the time domain data sequence of the third symbol is delayed by T1compared to the time domain data sequence of the second symbol, i.e., delayed by 2T1compared to the time domain data sequence of the first symbol; and so on. The five boxes of the last row (indicated by the dotted area) represent the time domain data sequence of the 14th symbol (obtained by waveform modulation of the time domain data on the 14th symbol), and the time domain data sequence of the 14th symbol is delayed by T1compared to the time domain data sequence of the 13th symbol, i.e., delayed by 13T1compared to the time domain data sequence of the first symbol. The first 2 symbols transmit the first reference signal, the last 3 symbols transmit the second reference signal, the first reference signal transmitted by the first 2 symbols on the physical resource block is the same as the first reference signal transmitted by the first H symbols on the adjacent next physical resource block in the time domain, and the second reference signal transmitted by the last 3 symbols on the physical resource block is the same as the second reference signal transmitted by the last T symbols on the adjacent next physical resource block in the time domain.

[0063] Figure 9In the diagram, the distance between the two solid vertical lines represents the length of a physical resource block; the two dashed lines represent the start and end positions of the entire physical resource block after waveform modulation, respectively. During the superposition process, a time-domain data sequence starting from the overall start position (left dashed line) and extending a certain length forward can be superimposed onto a region of the same length before the end position of the physical resource block (right solid line). Conversely, a time-domain data sequence starting from the overall end position (right dashed line) and extending a certain length forward can be superimposed onto a region of the same length after the start position of the physical resource block (left solid line), thus ensuring that the length of a physical resource block remains constant—this is cyclic superposition. Alternatively, the waveform modulated M... i The temporal data sequences of symbols can be linearly superimposed, with temporal data sequences exceeding the length of a physical resource block superimposed on the adjacent previous and next physical resource blocks respectively.

[0064] In one embodiment, waveform modulation refers to first copying the time-domain data of each symbol in the physical resource block with a period of T0, to obtain time-domain data of length 5×T0 for each symbol; in addition, before delay and superposition, the discrete function value of the set waveform function is multiplied by the data sequence of length 5×T0 for each symbol to perform waveform modulation, so as to obtain a time-domain data sequence of length 5×T0 corresponding to 14 symbols after waveform modulation.

[0065] like Figure 9 As shown, 14 waveform-modulated time-domain data sequences of length 5×T0 are sequentially delayed (or staggered) by T1 in the time domain and then superimposed to obtain a time-domain data sequence of length 13×T1+5T0. Using the length of the physical resource block (two solid lines), a time-domain data sequence of length 13×T1+5T0 is extracted. The time-domain data sequences before and after the two solid lines are superimposed onto the last and first parts of the two solid line regions, respectively, so that the length of the extracted time-domain data sequence remains 14×T1, i.e., the length of the physical resource block remains 14×T1, where T1>T0. In this embodiment, the length of the time-domain data of each symbol after waveform modulation is 5×T0=5T0 / T1×T1, i.e., N=(5T0 / T1).

[0066] In one embodiment, the number of subcarriers in the L physical resource blocks of each time slot is the same, and the subcarrier spacing in the L physical resource blocks of each time slot is the same.

[0067] In one embodiment, T1 is greater than T0, or T1 is less than or equal to T0; where T0 is the reciprocal of the subcarrier spacing.

[0068] In an embodiment, when T1 is greater than TO, T1 is a times of TO, where a is in the range of [15 / 14, 2] or [8 / 7, 2].

[0069] In the embodiment, T1 is in the range of to 2TO, or to 2TO.

[0070] In an embodiment, the method further comprises:

[0071] Step 1001: adding zero data on a plurality of subcarriers on both sides of the subcarriers in the frequency domain of the physical resource block. In the embodiment, oversampling is achieved by adding zero data.

[0072] In an embodiment, the waveform function is one of a root raised cosine function, a raised cosine function, a piecewise function, and a rectangular function; where the raised cosine function is a raised cosine function in the time domain or a function in the frequency domain converted to the time domain by IFFT; the root raised cosine function is a root raised cosine function in the time domain or a function in the frequency domain converted to the time domain by IFFT; and the non-zero function value of the piecewise function is represented by a combination of a plurality of data expressions in different independent variable intervals.

[0073] Figure 10 A schematic diagram of the waveform function provided in an embodiment is shown in FIG. 1. As shown in FIG. 1, the solid line represents an extended root raised cosine function, the dashed line represents a waveform function 1 which is a function in the frequency domain converted to the time domain by IFFT, and the thick solid line represents a waveform function 2 which is a raised cosine function in the time domain. Figure 10

[0074] In an embodiment, the maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is greater than T1; or the maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is equal to 5T1.

[0075] In an embodiment, step 1020 comprises:

[0076] The oversampled time domain data on each symbol is copied with TO as the period to obtain a data sequence corresponding to each symbol and having a length of the product of N and T1, where TO is the inverse of the subcarrier spacing;

[0077] The discrete function values of the waveform function are respectively multiplied by the data sequence corresponding to each symbol and having a length of the product of N and T1 to obtain a time domain data sequence modulated by the waveform and having a length of the product of N and T1.

[0078] In the embodiment, the process of obtaining the time domain data sequence modulated by the waveform through multiplication can be understood as a process of windowing.​

[0079] In an embodiment, the waveform function is a continuous function, and the discrete function values of the waveform function are obtained by sampling the values of the continuous function at intervals equal to the time interval between adjacent discrete data in the time domain data of each symbol; or, the waveform function is a discrete function, and the number of the discrete function values of the waveform function is the same as the number of the discrete data in the time domain data sequence of the product of N and T1.

[0080] In an embodiment, each time slot contains L physical resource blocks, and L is greater than or equal to 1.

[0081] The waveform functions used for the modulation of the L physical resource blocks in each time slot are the same; and the reference signals on the last T symbols of the L physical resource blocks are the same. The waveform functions used for the modulation of the physical resource blocks in different time slots are the same or different.

[0082] The embodiments of the present application also provide a reference signal transmission device. Figure 11 A structural schematic diagram of a reference signal transmission device provided by an embodiment is shown in FIG. 2. Figure 11 As shown in FIG. 2, the reference signal transmission device includes a first transmission module 210 and a second transmission module 220.

[0083] The first transmission module 210 is configured to transmit a first reference signal through the first H symbols in the time domain of a physical resource block, where H is greater than or equal to 2.

[0084] The second transmission module 220 is configured to transmit a second reference signal through the last T symbols in the time domain of a physical resource block, where T is greater than or equal to H.

[0085] The reference signal transmission device of the embodiment provides the first reference signal and the second reference signal for the receiving end to perform phase estimation and compensation, frequency offset correction, auxiliary channel estimation, etc., so as to meet the estimation requirement for phase noise and improve the demodulation performance of the receiving end.

[0086] In an embodiment, the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next physical resource block adjacent in the time domain.

[0087] The first reference signal is transmitted through the first H symbols of each physical resource block, and the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next physical resource block adjacent in the time domain, so as to resist uplink and downlink interference.

[0088] In an embodiment, the second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next physical resource block adjacent in time domain.

[0089] The second reference signal is transmitted through the last T symbols of each physical resource block, and the second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next physical resource block adjacent in time domain, i.e. the last reference signal symbol of the physical resource block can be regarded as the cyclic prefix of the next physical resource block adjacent in time domain, thereby overcoming the problem of multipath delay and improving the demodulation performance of the receiving end.

[0090] In an embodiment, the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next physical resource block adjacent in time domain, and the second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next physical resource block adjacent in time domain, thereby reducing the out-of-band leakage.

[0091] In an embodiment, each time slot contains L physical resource blocks, and L is greater than or equal to 1.

[0092] The i-th physical resource block in each time slot is composed of M symbols in time domain and K subcarriers in frequency domain, where M is greater than or equal to the sum of T and H, K is greater than or equal to 1, and i is a positive integer less than or equal to L. i i i i

[0093] In an embodiment, among the L physical resource blocks in each time slot,

[0094] P physical resource blocks contain symbols equal to the sum of T and H;

[0095] L-P physical resource blocks contain symbols greater than the sum of T and H;

[0096] Wherein, P is greater than or equal to 0, and P is less than or equal to L.

[0097] In an embodiment, when P is equal to 0, the first H symbols in time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and the symbols other than the first H symbols and the last T symbols are used to transmit relevant information;

[0098] When P is equal to L, the first H symbols in time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and each physical resource block does not contain relevant information.​​​​

[0099] In a case that P is greater than 0 and P is less than L, the first H symbols in time domain of each of the P physical resource blocks in each time slot are used for transmitting the first reference signal, the last T symbols are used for transmitting the second reference signal, and each of the P physical resource blocks does not contain the related information, the first H symbols in time domain of each of the L-P physical resource blocks in each time slot are used for transmitting the first reference signal, the last T symbols are used for transmitting the second reference signal, and the symbols other than the first H symbols and the last T symbols are used for transmitting the related information;

[0100] The related information includes at least one of service data and a third reference signal.

[0101] In an embodiment, the number of subcarriers contained in the L physical resource blocks in each time slot is the same, and the subcarrier spacing in the L physical resource blocks in each time slot is the same.

[0102] In an embodiment, the method further comprises:

[0103] The oversampling module is configured to perform IFFT on the frequency domain data of each symbol in the physical resource block respectively to obtain the oversampling time domain data of each symbol;

[0104] The waveform modulation module is configured to modulate the oversampling time domain data of each symbol by a waveform function, wherein the argument interval length of the waveform function is the product of N and T1, the length of the time domain data sequence of each symbol after modulation is the product of N and T1, N is a real number greater than 1, and T1 is a positive number;

[0105] The superposition module is configured to delay the time domain data sequence of each symbol after modulation by T1 on the basis of the time domain data sequence of the adjacent previous symbol in turn, so that the interval between adjacent symbols in the physical resource block is T1, and superimposes the time domain data sequence of each symbol after delay.

[0106] In an embodiment, T1 is greater than T0, or T1 is less than or equal to T0; wherein T0 is the reciprocal of the subcarrier spacing.

[0107] In an embodiment, in a case that T1 is greater than T0, T1 is a times of T0, wherein the value range of a is [15 / 14, 2] or [8 / 7, 2].

[0108] In an embodiment, the method further comprises:

[0109] The adding module is configured to add zero data on a plurality of subcarriers on both sides of the subcarriers in the frequency domain in the physical resource block.

[0110] In an embodiment, the waveform function is one of a root raised cosine function, a raised cosine function, a piecewise function, and a rectangular function.

[0111] The raised cosine function is a raised cosine function in time domain, or a raised cosine function in frequency domain converted to time domain by IFFT.

[0112] The root raised cosine function is a root raised cosine function in time domain, or a root raised cosine function in frequency domain converted to time domain by IFFT.

[0113] The non-zero function value of the piecewise function is represented by a combination of multiple data expressions in different independent variable intervals.

[0114] In an embodiment, the maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is greater than T1; or,

[0115] The maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is equal to 5T1.

[0116] In an embodiment, the waveform modulation module is configured to:

[0117] Copy the oversampled time domain data on each symbol with T0 as the period to obtain a data sequence corresponding to each symbol with a length of the product of N and T1, T0 being the inverse of the subcarrier spacing;

[0118] Point multiply the discrete function value of the waveform function with the data sequence corresponding to each symbol with a length of the product of N and T1 to obtain a corresponding waveform-modulated time domain data sequence with a length of the product of N and T1.

[0119] In an embodiment, the waveform function is a continuous function, and the discrete function value of the waveform function is obtained by sampling the value of the continuous function, the sampling interval being equal to the time interval between adjacent discrete data in the time domain data of each symbol; or,

[0120] The waveform function is a discrete function, and the number of discrete function values of the waveform function is the same as the number of discrete data in the time domain data sequence of each symbol with a length of the product of N and T1.

[0121] In an embodiment, each time slot contains L physical resource blocks, L being greater than or equal to 1;

[0122] The waveform functions used for modulation of the L physical resource blocks in each time slot are the same;

[0123] The waveform functions used for modulation of the physical resource blocks in different time slots are the same or different.

[0124] The reference signal transmission apparatus provided in the embodiment belongs to the same inventive concept as the reference signal transmission method applied to the second node provided in the above embodiment, and the technical details not described in detail in the embodiment can be seen from any of the above embodiments, and the embodiment has the same beneficial effects as performing the reference signal transmission method applied to the second node.

[0125] The application further provides a communication node. The above-mentioned reference signal transmission method applied to the communication node can be executed by a reference signal transmission apparatus, which can be realized by software and / or hardware and integrated in the communication node. The communication node is a sending end or a receiving end of the reference signal.

[0126] Figure 12 A hardware structure schematic diagram of a communication node provided in an embodiment is shown in FIG. 1, and the communication node provided in the application includes one or more processors 51, wherein the one or more processors 51 realize the reference signal transmission method provided in any embodiment of the application when executed, and correspondingly, the communication node can be a terminal. Figure 12

[0127] The communication node can further include a storage device 52; the processor 51 in the communication node can be one or more, Figure 12 for example, one processor 51; the storage device 52 is configured to store one or more programs; the one or more programs are executed by the one or more processors 51, so that the one or more processors 51 realize the reference signal transmission method as described in the embodiments of the application.

[0128] The communication node further includes a communication device 53, an input device 54 and an output device 55.

[0129] The processor 51, the storage device 52, the communication device 53, the input device 54 and the output device 55 in the communication node can be connected through a bus or other means, Figure 12 for example, through a bus.

[0130] The input device 54 can be configured to receive input digital or character information, and generate key signal input related to user settings and function control of the communication node. The output device 55 can include a display device such as a display screen.

[0131] The communication device 53 can include a receiver and a transmitter. The communication device 53 is configured to perform information receiving and transmitting communication according to the control of the processor 51.

[0132] ​The storage device 52, as a computer readable storage medium, can be configured to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the reference signal transmission method described in the embodiments of the present application (for example, the first transmission module 210 and the second transmission module 220). The storage device 52 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; and the data storage area can store data created according to the use of the communication node, and the like. In addition, the storage device 52 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some examples, the storage device 52 can further include a storage device remotely arranged with respect to the processor 51, and these remote storage devices can be connected to the communication node through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0133] The embodiments of the present application also provide a storage medium storing a computer program, and the computer program is executed by a processor to implement the reference signal transmission method described in any of the embodiments of the present application. The reference signal transmission method includes: transmitting a first reference signal through the first H symbols in the time domain of the physical resource block, wherein H is greater than or equal to 2; and transmitting a second reference signal through the last T symbols in the time domain of the physical resource block, wherein T is greater than or equal to H.

[0134] The computer storage medium of the embodiments of the present application can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples (non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM), a flash memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the above. The computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, device or apparatus.

[0135] A computer readable signal medium can include a propagated data signal with computer executable code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal can take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium can be any computer readable medium that can be involved in

[0136] The code can be transmitted in any form, including, but not limited to, radio frequency (RF) signals, digital signals, light, sound, or other media. The media can take a variety of forms, including, but not limited to, wire, cable, fiber optics, and / or wireless media. The computer program code can be implemented in any of a variety of programming languages, including, but not limited to, C, C++, Java, and / or Visual Basic, among others.

[0137] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0138] The specific embodiments described herein have been chosen for purposes of illustration and example, and are not intended to limit the scope of the application.

[0139] Those skilled in the art will appreciate that the term terminal encompasses any suitable type of wireless user equipment, such as mobile telephones, portable data processing devices, portable web browsers, or in-car mobile stations.

[0140] In general, the various embodiments of the application can be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software which can be executed by a controller, microprocessor or other computing device, although the application is not limited thereto. The various embodiments of the application can be implemented using any of these technologies.

[0141] Embodiments of the application can be implemented by computer program instructions on a data processor of a mobile device, for example in processor entities, or by hardware, or by a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0142] Any block diagrams of logical flows of the application can represent program steps, or logical operations, or a combination of program steps and logical operations. The computer program can be stored in a memory. The memory can be of any type suitable to the local technical environment and can be implemented using any suitable data storage technology, such as optical memory devices, magnetic memory devices, random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), phase change memory (PCM), flash memory devices, and the like. The computer-readable media can include non-transitory storage media. The data processor can be of any type suitable to the local technical environment, and can include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASIC), field programmable gate arrays (FPGAs), and processors of multi-core processor architectures, as examples. The embodiments can be implemented using any hardware, software, systems, circuits, components, modules or combinations thereof.

[0143] The foregoing detailed description of the inventive embodiments has been presented for purposes of illustration and description. It is understood that many modifications and variations will be apparent to practitioners skilled in the art, and that the application is being limited only by the appended claims. Thus, the appropriate scope of the application is to be determined not only by the claims but also by the reasonable inferences drawn therefrom.

Claims

1. A reference signal transmission method, characterized by, The method comprises: transmitting a first reference signal through the first H symbols in the time domain of the physical resource block, wherein H is greater than or equal to 2; transmitting a second reference signal through the last T symbols in the time domain of the physical resource block, wherein T is greater than or equal to H; wherein the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next physical resource block adjacent in the time domain; The method further comprises: performing inverse fast Fourier transform (IFFT) on the frequency domain data of each symbol in the physical resource block to obtain oversampled time domain data of each symbol; modulating the oversampled time domain data of each symbol by a waveform function, wherein the argument interval length of the waveform function is the product of N and T1, and the length of the time domain data sequence of each symbol after modulation is the product of N and T1, N is a real number greater than 1, and T1 is a positive number; delaying the time domain data sequence of each symbol after modulation by T1 on the basis of the time domain data sequence of the adjacent symbol in sequence, so that the adjacent symbols in the physical resource block are separated by T1, and superimposing the time domain data sequence of each symbol after delay.

2. The method of claim 1, wherein: the second reference signal corresponding to the last T symbols of the physical resource block is the same as the reference signal corresponding to the last T symbols of the next physical resource block adjacent in the time domain.

3. The method of claim 1, wherein, Each time slot contains L physical resource blocks, and L is greater than or equal to 1. The ith physical resource block in each time slot is composed of M i symbols in the time domain and K i subcarriers in the frequency domain, where M i is greater than or equal to the sum of T and H, K i is greater than or equal to 1, and i is a positive integer less than or equal to L.

4. The method of claim 3, wherein, In the L physical resource blocks in each time slot, P physical resource blocks contain a number of symbols equal to the sum of T and H, and L-P physical resource blocks contain a number of symbols greater than the sum of T and H. Wherein, P is greater than or equal to 0, and P is less than or equal to L.

5. The method of claim 4, wherein: in the case where P is equal to 0, the first H symbols in the time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and the symbols other than the first H symbols and the last T symbols are used to transmit relevant information; in the case where P is equal to L, the first H symbols in the time domain of each physical resource block in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and each physical resource block does not contain relevant information; in the case where P is greater than 0 and P is less than L, the first H symbols in the time domain of each physical resource block in the P physical resource blocks in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and each physical resource block does not contain relevant information, the first H symbols in the time domain of each physical resource block in the L-P physical resource blocks in each time slot are used to transmit the first reference signal, the last T symbols are used to transmit the second reference signal, and the symbols other than the first H symbols and the last T symbols are used to transmit relevant information; wherein the relevant information includes at least one of service data and a third reference signal.

6. The method of claim 3, wherein, The number of subcarriers contained in the L physical resource blocks in each time slot is the same, and the subcarrier spacing in the L physical resource blocks in each time slot is the same.

7. The method of claim 1, wherein, T1 is greater than T0, or, T1 is less than or equal to T0; Wherein, T0 is the reciprocal of the subcarrier spacing.

8. The method of claim 7, wherein, In the case of T1 greater than T0, T1 is a times of T0, wherein the value range of a is [15 / 14, 2] or [8 / 7, 2].

9. The method of claim 1, wherein, Also includes: Adding zero data on a plurality of subcarriers on both sides of the subcarriers in the frequency domain of the physical resource block.

10. The method of claim 1, wherein, The waveform function is one of a root raised cosine function, a raised cosine function, a segmented function and a rectangular function; Wherein, the raised cosine function is a raised cosine function in the time domain, or a function in the frequency domain changed to the time domain by IFFT; The root raised cosine function is a root raised cosine function in the time domain, or a function in the frequency domain changed to the time domain by IFFT; The non-zero function value of the segmented function is represented by a combination of a plurality of data expressions in different independent variable intervals.

11. The method of claim 1, wherein, The maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is greater than T1; or, The maximum time span of the independent variable interval corresponding to the non-zero function value of the waveform function is equal to 5T1.

12. The method of claim 1, wherein, Modulating the time domain data on each symbol after IFFT by the waveform function, including: Copying the oversampling time domain data on each symbol with T0 as the period to obtain a data sequence corresponding to each symbol with a length of the product of N and T1, T0 is the reciprocal of the subcarrier spacing; Point multiplying the discrete function value of the waveform function with the data sequence corresponding to each symbol with a length of the product of N and T1 to obtain the corresponding waveform modulated time domain data sequence with a length of the product of N and T1.

13. The method of claim 1, wherein, The waveform function is a continuous function, and the discrete function value of the waveform function is obtained by sampling the value of the continuous function, and the sampling interval is equal to the time interval between adjacent discrete data in the time domain data of each symbol; Or, The waveform function is a discrete function, and the number of discrete function values of the waveform function is the same as the number of discrete data in the time domain data sequence with a length of the product of N and T1 of each symbol.

14. The method of claim 1, wherein, Each time slot contains L physical resource blocks, and L is greater than or equal to 1; The waveform function used for modulation of the L physical resource blocks in each time slot is the same; The waveform functions used for modulation of the physical resource blocks in different time slots are the same or different.

15. A reference signal transmission apparatus, comprising: Including: The first transmission module is configured to transmit the first reference signal through the first H symbols in the time domain of the physical resource block, wherein H is greater than or equal to 2; The second transmission module is configured to transmit the second reference signal through the last T symbols in the time domain of the physical resource block, wherein T is greater than or equal to H; Wherein, the first reference signal corresponding to the first H symbols of the physical resource block is the same as the reference signal corresponding to the first H symbols of the next physical resource block adjacent in the time domain; The device further includes: The oversampling module is configured to perform IFFT on the frequency domain data of each symbol in the physical resource block to obtain the oversampling time domain data of each symbol; a waveform modulation module, configured to modulate the oversampled time-domain data of each symbol by a waveform function, wherein a length of an argument interval of the waveform function is a product of N and T1, a length of the time-domain data sequence of each symbol after modulation is a product of N and T1, N is a real number greater than 1, and T1 is a positive number; a superposition module, configured to delay the time-domain data sequence of each symbol after modulation on the basis of the time-domain data sequence of an adjacent last symbol by T1 in sequence, so that an interval between adjacent symbols in the physical resource block is T1, and superimpose the time-domain data sequence of each symbol after delay.

16. A communication node, characterized by comprising: one or more processors; a memory device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the reference signal transmission method according to any one of claims 1-14.

17. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the reference signal transmission method according to any one of claims 1-14.

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