Communication method, device, communication equipment and storage medium

Abstract

Embodiments of the present invention disclose a communication method, apparatus, communication device, and storage medium. The method includes: a network device determining first information based on a first capability and / or first resource of a terminal; the first information is used to indicate waveform parameters of the terminal; the first resource represents resources allocated by the network device to the terminal; the first information is sent to the terminal; in response, the terminal receives the first information from the network device; and the waveform parameters are determined based on the first information. The solution disclosed in the embodiments of the present invention allows the network device to more flexibly configure waveform parameters based on the capabilities and / or resources of different terminals, rather than being limited to a fixed waveform parameter configuration.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a communication method, apparatus, communication equipment, and storage medium. Background Art

[0002] In the Long Term Evolution (LTE) system and the current fifth-generation mobile communication technology (5G) standard, the physical layer air interface waveform technology Orthogonal Frequency-Division Multiplexing (OFDM) system can reduce signal processing complexity through the simple structure of Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT). Not only can it perfectly integrate with multi-antenna systems and has the ability to resist multipath fading, but its use of rectangular pulse windows for modulation on each OFDM subcarrier leads to excessive spectrum leakage and loss of design flexibility. The shortcomings of OFDM technology, such as high Peak-to-Average Power Ratio (PAPR), sensitivity to frequency offset and phase noise, and difficulty in supporting asynchronous transmission, make it unsuitable for the higher transmission rate Beyond 5G mobile communication systems (B5G).

[0003] In the current 5G standard, only one waveform parameter configuration can be supported in the entire system bandwidth. However, 5G and future wireless communication scenarios are complex and changeable. The current method of supporting only one waveform parameter configuration cannot adapt to the use of multiple scenarios in the future. Summary of the Invention

[0004] To solve related technical problems, the embodiments of the present application provide a communication method, apparatus, communication equipment and storage medium.

[0005] An embodiment of the present invention provides a communication method, applied to a terminal, including:

[0006] Receive first information from a network device; the first information is used to indicate a waveform parameter of a terminal; the first information is determined according to a first capability and / or a first resource of the terminal, the first resource representing a resource allocated by the network device to the terminal;

[0007] The waveform parameters are determined according to the first information.

[0008] In the above solution, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0009] In the above solution, the first information includes: at least one first index; wherein the first index is used to indicate the waveform parameters of the terminal corresponding thereto.

[0010] In the above solution, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto;

[0011] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0012] In the above solution, the first filter is determined according to the application scenario requirements.

[0013] In the above solution, the waveform parameters include: filter and / or windowing coefficients.

[0014] In the above solution, the filter is a partial band filter.

[0015] In the above solution, the receiving of the first information from the network device includes: receiving the waveform parameters in a semi-static manner or a dynamic manner.

[0016] In the above solution, the receiving of the first information from the network device includes:

[0017] Receive RRC signaling or DCI signaling from a network device; the RRC signaling or DCI signaling indicates the first information.

[0018] An embodiment of the present invention provides a communication method, applied to a network device, comprising:

[0019] Determining first information based on a first capability and / or a first resource of the terminal; the first information is used to indicate a waveform parameter of the terminal; the first resource represents a resource allocated by the network device to the terminal;

[0020] Sending the first information to the terminal.

[0021] In the above solution, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0022] In the above solution, the first information includes: at least one first index; wherein the first index is used to indicate the waveform parameters of the terminal corresponding thereto.

[0023] In the above solution, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto;

[0024] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0025] In the above solution, the method further includes:

[0026] According to the application scenario requirements, a first filter is determined for the corresponding application scenario requirements.

[0027] In the above solution, the waveform parameters include: filter and / or windowing coefficients.

[0028] In the above solution, the filter is a partial band filter.

[0029] In the above solution, the waveform parameters are configured in a semi-static manner or a dynamic manner.

[0030] In the above solution, the sending the first information to the terminal includes:

[0031] Sending radio resource control (RRC) signaling or downlink control information (DCI) signaling to the terminal; the RRC signaling or DCI signaling indicates the first information.

[0032] An embodiment of the present invention provides a communication device, applied to a terminal, including:

[0033] A receiving module, configured to receive first information from a network device; the first information is used to indicate waveform parameters of a terminal; the first information is determined based on a first capability and / or a first resource of the terminal, the first resource representing a resource allocated by the network device to the terminal;

[0034] A determination module is used to determine waveform parameters according to the first information.

[0035] In the above solution, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0036] In the above solution, the first information includes: at least one first index; wherein the first index is used to indicate the waveform parameters of the terminal corresponding thereto.

[0037] In the above solution, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate the frequency shift coefficient of the terminal corresponding thereto;

[0038] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0039] In the above solution, the first filter is determined according to the application scenario requirements.

[0040] In the above solution, the waveform parameters include: filter and / or windowing coefficients.

[0041] In the above solution, the filter is a partial band filter.

[0042] In the above solution, the receiving module is used to receive the waveform parameters in a semi-static manner or a dynamic manner.

[0043] In the above solution, the receiving module is used to receive RRC signaling or DCI signaling from a network device; the RRC signaling or DCI signaling indicates the first information.

[0044] An embodiment of the present invention provides a communication device, applied to a network device, including:

[0045] A processing module, configured to determine first information according to a first capability and / or a first resource of the terminal; the first information is used to indicate a waveform parameter of the terminal; the first resource represents a resource allocated by the network device to the terminal;

[0046] A sending module is used to send the first information to the terminal.

[0047] In the above solution, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0048] In the above solution, the first information includes: at least one first index; wherein the first index is used to indicate the waveform parameters of the terminal corresponding thereto.

[0049] In the above solution, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate the frequency shift coefficient of the terminal corresponding thereto;

[0050] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0051] In the above solution, the processing module is further used to determine a first filter for the corresponding application scenario requirements according to the application scenario requirements.

[0052] In the above solution, the waveform parameters include: filter and / or windowing coefficients.

[0053] In the above solution, the filter is a partial band filter.

[0054] In the above solution, the waveform parameters are configured in a semi-static manner or a dynamic manner.

[0055] In some embodiments, the sending module is used to send RRC signaling or DCI signaling to the terminal; the RRC signaling or DCI signaling indicates the first information.

[0056] An embodiment of the present invention provides a communication device, comprising: a processor and a memory for storing a computer program that can be run on the processor.

[0057] Wherein, the processor is configured to execute the steps of any one of the communication methods on the network device side when running the computer program; or

[0058] The processor is configured to execute the steps of any one of the communication methods on the terminal side when running the computer program.

[0059] An embodiment of the present invention further provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of any one of the communication methods on the network device side are implemented; or,

[0060] When the computer program is executed by a processor, the steps of any one of the communication methods on the terminal side are implemented.

[0061] Embodiments of the present invention provide a communication method, apparatus, and storage medium. The method includes: a network device determining first information based on a first capability and / or a first resource of a terminal; the first information being used to indicate a waveform parameter of the terminal; the first resource representing a resource allocated by the network device to the terminal; and sending the first information to the terminal. In this way, the network device can more flexibly configure waveform parameters based on the capabilities and / or resources of different terminals, rather than being limited to a fixed waveform parameter configuration.

[0062] Accordingly, the terminal receives first information from the network device; the first information is used to indicate the waveform parameters of the terminal; the first information is determined based on the first capability and / or first resource of the terminal, and the first resource represents the resources allocated by the network device to the terminal; based on the first information, the waveform parameters are determined; in this way, the terminal can obtain waveform parameters determined based on its own capabilities and / or resources, without being limited to a fixed waveform parameter configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A flow chart of a communication method provided in an embodiment of the present invention;

[0064] Figure 2 A schematic diagram of an index table provided in an application embodiment of the present invention;

[0065] Figure 3 A schematic diagram of another index table provided in an application embodiment of the present invention;

[0066] Figure 4 A schematic diagram of a transceiver structure of an uplink transmission system provided by an embodiment of the present invention;

[0067] Figure 5 A schematic diagram of a flow chart of another communication method provided by an embodiment of the present invention;

[0068] Figure 6 A schematic diagram of pre-configured waveform parameters obtained for different terminals provided in an application embodiment of the present invention;

[0069] Figure 7 A schematic diagram comparing the power spectral density of the optimized enhanced waveform and the standardized waveform provided in an embodiment of the present invention;

[0070] Figure 8 A schematic structural diagram of a communication device provided in an embodiment of the present invention;

[0071] Figure 9 A schematic structural diagram of another communication device provided in an embodiment of the present invention;

[0072] Figure 10 A schematic structural diagram of a communication device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0073] The present invention will be further described in detail with reference to the embodiments, and the related technologies will be described first.

[0074] At present, there is no consensus on which waveform technology should be used in the future B5G system. At the 2016 3rd Generation Partnership Project (3GPP) meeting on the design of the 5G new air interface, various companies proposed a variety of multi-carrier modulation waveform structures based on OFDM: CP-OFDM with Weighted Overlap and Add, Filter Bank Multi-Carrier (FBMC), Universal Filtered Multi-Carrier (UFMC), and Orthogonal Frequency Division Multiplexing based on partial frequency band filtering (F-OFDM, Filtered-OFDM).

[0075] The CP-OFDM technology currently used in the 5G standard uses a rectangular pulse window for modulation on each subcarrier, resulting in high out-of-band leakage and stringent synchronization requirements. The candidate new waveforms proposed by various companies at the 2016 3GPP meeting all rely on OFDM technology, optimizing waveform design through windowing or filtering to reduce out-of-band leakage and improve time-frequency resource utilization. However, these new waveform candidates address out-of-band leakage from a single perspective (either the time or frequency domain), resulting in limited suppression. Furthermore, signal conversion processing in the time and frequency domains is highly correlated, creating a conflict between time-domain focusing and frequency-domain focusing. For example, optimizing filters with good frequency-domain focusing performance in the frequency domain can effectively suppress out-of-band leakage. However, this suppression performance is proportional to the filter order: better frequency-domain out-of-band leakage suppression and higher filter order results in longer time-domain symbols and weaker time-domain focusing. Secondly, when optimizing window functions or filters, only the baseband side's requirements are considered. However, the waveform characteristics of the baseband side are not considered. This can cause the actual signal after filtering and modulation to pass through the RF front end, resulting in severe ICI or high PAPR due to the nonlinear characteristics of the power amplifier, resulting in a large amount of energy waste and increased hardware costs. Furthermore, the current 5G standard only supports one waveform parameter configuration across the entire system bandwidth, and cannot configure different waveform parameters for different terminals. 5G and future wireless communication scenarios are complex and diverse, and the current method of supporting only one waveform parameter configuration is not suitable for future multi-scenario use.

[0076] Based on this, in the method provided by an embodiment of the present invention, a network device determines first information based on a first capability and / or first resource of a terminal; the first information is used to indicate waveform parameters of the terminal; the first resource represents the resources allocated by the network device to the terminal; the first information is sent to the terminal; in response, the terminal receives the first information from the network device; and the waveform parameters are determined based on the first information. In this way, the network device can more flexibly configure waveform parameters based on the capabilities and / or resources of different terminals, rather than being limited to a fixed waveform parameter configuration.

[0077] The present invention will be further described in detail below with reference to the embodiments.

[0078] Figure 1 A flow chart of a communication method provided by an embodiment of the present invention; Figure 1 As shown, the method is applied to a network device; the network device may be a base station, an NG-RAN node, etc.; the method includes:

[0079] Step 101: Determine first information based on a first capability and / or a first resource of a terminal; the first information is used to indicate a waveform parameter of the terminal; and the first resource represents a resource allocated by a network device to the terminal.

[0080] Step 102: Send the first information to the terminal.

[0081] In some embodiments, the waveform parameters include: filter and / or windowing coefficients.

[0082] In practical applications, the filter may be a partial frequency band filter.

[0083] A partial frequency band refers to a frequency subset of the entire carrier frequency band. The base station may configure only a partial frequency band as a bandwidth part (BWP) for the terminal.

[0084] The embodiment of the present invention does not limit the name of the filter, and it only needs to implement a filtering operation, for example, implement a BWP filtering operation.

[0085] In some embodiments, the waveform parameters are configured in a semi-static manner or a dynamic manner.

[0086] In some embodiments, the first information may indicate the waveform parameters required by one terminal, or may indicate the waveform parameters required by each terminal separately for multiple terminals;

[0087] Specifically, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0088] In an application embodiment, an explicit configuration method is provided, which uses a semi-static or dynamic configuration method to directly inform the terminal of the filter and / or windowing coefficients.

[0089] For example, when the length of the filter and / or windowing coefficient is not long, the waveform parameters are directly notified to the terminal in the form of data.

[0090] Assume that the network device determines the waveform parameters of multiple terminals, that is, determines and sends the first information: h w,f =[w1,w2,...w M ,f 1 a +if 1 b ,...,f N a +if N b ,]; the information received by the terminal is [w1,w2,...w M ,f 1 a ,f1 b ,...,f N a ,f N b ]. Among them, [w1,w2,...w M ] represents the windowing coefficient of a terminal, which consists of M real numbers, where M is the length of the window function; [f 1 a +if 1 b ,...,f N a +if N b ] represents the filter coefficient of a terminal, which consists of N complex numbers, where N is the filter length, i represents the imaginary unit, and f N a , f N b Represent the real and imaginary parts of the Nth coefficient component respectively.

[0091] The above example is only an example of the waveform parameters that a terminal may receive and is not intended to be limiting. w,f It is composed of window coefficients and filter coefficients. The window coefficients are real numbers and the filter coefficients are complex numbers. Therefore, after the optimal waveform parameters are obtained after optimization, the waveform parameters can be sent to the terminal in the form of real values.

[0092] In some embodiments, the first information includes: at least one first index; wherein the first index is used to indicate the waveform parameters (ie, filter and / or windowing coefficients) of the terminal corresponding thereto.

[0093] Specifically, in an application embodiment, an implicit configuration method is provided, that is, the filter and / or windowing coefficient is not directly notified, but an indirect method is adopted, for example, by pre-configuring a filter and / or windowing coefficient table under different resource sizes and / or terminal capability assumptions, and then configuring the index under the filter and / or windowing coefficient table through a semi-static or dynamic notification method to indicate;

[0094] The first information sent by the network device includes each first index (each first index can be saved in a certain index table, and the first information includes the index table). The terminal side receives the first information to determine its own corresponding first index, and queries the filter and / or windowing coefficient table based on the determined first index to obtain the filter and / or windowing coefficient corresponding to the terminal itself, that is, the waveform parameters.

[0095] Figure 2 A schematic diagram of an index table provided in an application embodiment of the present invention; Figure 2As shown, the pre-configured waveform parameter 1 is a waveform parameter h required by the terminal j that is directly returned to the terminal j. j w,f Corresponding index number Index j, terminal j can directly obtain waveform parameter h according to index number Index j j w,f . Among them, the DCI field is used to indicate RB.

[0096] Here, the index indicating the waveform parameter may be embodied in the DCI as an independent bit field, or may be jointly encoded with bits such as a resource indication.

[0097] In some embodiments, the first information includes: the first information includes: a first filter, at least one second index;

[0098] The second index is used to indicate the frequency shift coefficient of the terminal corresponding thereto;

[0099] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0100] Here, the first filter is determined by the network device according to the application scenario requirements, and the first filter is applicable to the cell terminal corresponding to the application scenario requirements of the first filter.

[0101] Based on this, the method further includes: determining a first filter for the corresponding application scenario requirements according to the application scenario requirements.

[0102] In one embodiment, another implicit configuration method is provided. By classifying the application scenario requirements of all terminals in a cell, a prototype filter (i.e., an example of a first filter) is optimized and designed to meet the needs of each terminal type based on the terminal requirements. The filters used by different terminal groups are obtained by multiplying the corresponding frequency shift by the prototype filter optimized for that type of requirement. Based on the different frequency shift amounts, an index table is constructed for each terminal group type, allowing different terminal groups to quickly configure waveform parameters for their own scenario requirement type group by simply labeling them.

[0103] Figure 3 A schematic diagram of another index table provided in an application embodiment of the present invention; Figure 2 and Figure 3 Given two possible forms, Figure 2 The preconfigured parameters 1 and Figure 3 The preconfigured parameters 2 in do not appear at the same time. Figure 2 The preconfigured parameters 1 and Figure 3 The pre-configured parameter 2 in is used to indicate the waveform parameters. Figure 3 The pre-configured parameter 2 shown is an index constructed based on a prototype filter. Figure 3 As shown in the figure, different terminals (UEs) occupy different numbers of resource blocks (RBs) and their occupied RB positions (1,...,I) are also different. UE 2 occupies three RBs, located at positions i-1, i, and i+1. After waveform optimization, the waveform parameters required by UE 2 should meet the requirements of the URLLC scenario. The waveform parameter index number matching UE 2 is then returned to UE 2 from the index table via signaling.

[0104] When applied, the network equipment can pre-classify the requirements of all terminal application scenarios in the cell and optimize the design of a prototype filter h that meets the requirements of the terminal type. w,f (i.e., an example of a first filter), considering that different terminals occupy different RB positions, the frequency shift coefficient f(Index j) can be multiplied on the basis of the prototype filter. The index number (Index j, i.e., an example of a second index) corresponds to a different frequency shift amount. The pre-configured parameter 2 obtained by the terminal is h w,f *f(Index j), that is, the filters used by different types of terminal groups are obtained by multiplying the corresponding frequency shift on the basis of the prototype filter under the requirements of this type of application scenario, so that different frequency shift amounts are used. Figure 3 The index table can quickly configure the waveform parameters under the type group required by your own scenario.

[0105] In some embodiments, the first information uses radio resource control (RRC) signaling or downlink control information (DCI) signaling.

[0106] Specifically, the sending the first information to the terminal includes:

[0107] Sending RRC signaling or DCI signaling to the terminal; the RRC signaling or DCI signaling indicates the first information.

[0108] In practical applications, in order to effectively improve the system's time-frequency resource utilization and asynchronous transmission performance, and to improve the problem of nonlinear damage to the transmitted signal modulated by the new waveform at the RF end due to the inherent high PAPR of the multi-carrier system, which wastes a lot of energy and thus increases the cost of hardware equipment, a waveform parameter optimization method is provided so that the obtained new waveform can achieve both low out-of-band leakage and peak-to-average power ratio.

[0109] Based on this, in some embodiments, the first resource represents a resource allocated by a network device to a terminal; such as a plurality of resource blocks (RBs) allocated by a base station to a terminal;

[0110] The first capability of the terminal can be sent by the corresponding terminal in advance to the network device through capability indication information to inform the network device. For example, the capability indication information includes: first indication information of the bandwidth combination supported by the terminal, second indication information indicating the radio frequency characteristics of the terminal, etc.

[0111] Specifically, determining the first information according to the first capability and / or the first resource of the terminal includes:

[0112] Determining, based on the first capability and / or first resource of the terminal, an optimal windowing coefficient and / or filter coefficient, taking a power spectral density (PSD) in a stopband of the transmitted signal as an optimization target, constraining a peak-to-average power ratio (PAPR) value of the transmitted signal;

[0113] A filter is determined according to the filter coefficients.

[0114] Specifically, the parameters involved in the optimization process of the waveform coefficient are determined based on the first capability and / or the first resource, so that the filter and / or windowing coefficients obtained for each terminal are related to the resource size occupied by the terminal and / or the capability of the terminal.

[0115] The terminal can pre-send configuration waveform information to the network device, including information such as the size of the terminal's resources, the terminal's capabilities, and the communication service environment the terminal is in. In response, the network device receives the configuration waveform information and optimizes the waveform parameters to match the configuration information sent by the terminal.

[0116] To optimize the waveform parameters, a cascaded module of time-domain windowing and frequency-domain filtering is constructed. The PAPR suppression of the RF front-end is factored into the waveform optimization design of the windowing and filter coefficients. The filters and / or windowing coefficients that match the resource size and / or capabilities of the terminal are jointly optimized. The optimal filters and / or windowing coefficients are the waveform parameters to be configured for the terminal.

[0117] Figure 4 A schematic diagram of a transceiver structure of an uplink transmission system provided in an embodiment of the present invention; the uplink transmission system is applied to network equipment to optimize waveform parameters. Figure 4 The transceiver shown in the figure designs a new enhanced OFDM waveform (WF-CP-OFDM, Windowing Filtered CP-OFDM) by constructing a cascade module of time domain windowing and frequency domain filtering at the transmitting end and jointly optimizing the cascade module. Among them, the subband filter is a frequency domain filtering module (wherein, the subband filter F krepresents the partial frequency band filter corresponding to terminal k); Add Window is the time domain windowing module.

[0118] like Figure 4 As shown, different terminals send their own binary sequences (Binary Source k), and each terminal's own transmission symbol Sk is obtained through modulation mapping (i.e. Mapper k). Sk is transmitted on the corresponding sub-band filter (the number of sub-carriers occupied by each sub-band filter (i.e. Subband filter Fk) is n k , the number of subcarriers is used to reflect the size of resources occupied by different terminals k), and after passing through the partial frequency band filter (i.e. Subband filter F k ) to obtain the transmitted signal after partial band filtering; then the inverse discrete Fourier transform (IDFT) matrix (ie IDFT V k ) to obtain the time domain transmitted signal sk; add a cyclic prefix (CP, Cyclic Prefix) and perform windowing (mathematical symbol is W m k ) Finally, the transmitted signal X is obtained after frequency domain filtering and time domain windowing. k In this process, the power spectral density (PSD) of the transmitted signal in the stop band is used as the optimization target, the peak-to-average power ratio (PAPR) value of the transmitted signal is constrained (the constraint threshold Q is set), and at the same time, the windowing operation and filtering operation are required not to cause energy loss of the transmitted signal, and the optimal windowing coefficient and / or filter coefficient corresponding to each terminal is determined. In addition, Figure 4 Remove Window, N-points DFT, Matched filter F k -1 They are respectively related to windowing, inverse Fourier transform (IDFT), filtering (subband filter F k ) corresponding inverse operation module, used for the terminal side to perform the corresponding demodulation operation. No more details.

[0119] The length of the filter or window function involved in the above process, the occupied frequency band, the number of subcarriers in the occupied frequency band (n k ) size, the number of IDTF points, the cyclic prefix length, the terminal power capability PAPR constraint value Q and other parameters are set based on the resource size occupied by different terminals k or the capability of terminal k.

[0120] Specifically, a corresponding relationship may be pre-set, which includes: the filter or window function length corresponding to the resource size occupied by various terminals, the occupied frequency band size, the number of subcarriers in the occupied frequency band, the number of IDTF points, the cyclic prefix length, etc.; and,

[0121] The capabilities of various terminals correspond to the filter or window function length, the occupied frequency band size, the number of subcarriers in the occupied frequency band, the number of IDTF points, the cyclic prefix length, the UE level, the terminal power capability PAPR constraint value, etc.

[0122] When applying, it is determined by querying the preset corresponding relationship.

[0123] In this way, the optimal windowing coefficient and / or filter coefficient is determined according to the first capability and / or first resource of the terminal and the preset optimization rules (i.e., the minimum PSD of the transmitted signal is the optimization target, the peak-to-average power ratio PAPR value of the transmitted signal is constrained, and the windowing operation and filtering operation are required not to cause energy loss of the transmitted signal); and then, the filter is determined according to the filter coefficient.

[0124] Furthermore, the design of the WF-CP-OFDM waveform is primarily based on constructing an optimization problem: minimizing the power spectral density (PSD) in the stopband of the transmitted signal after passing through the cascaded modules is the optimization goal, while constraining the peak-average power ratio (PAPR) of the transmitted signal. At the same time, neither windowing nor filtering operations should cause energy loss in the transmitted signal. Specifically, the equation is as follows:

[0125]

[0126] stf k (l) = f k (L f -1-l) (2);

[0127]

[0128] PAPR(x w,f ) dB ≤Q (4);

[0129] Among them, formula (1) indicates that the power spectral density (PSD) of the signal transmitted in the stop band after passing through the cascade module is minimized, which is the optimization goal;

[0130] Formula (2) expresses the symmetry of the filter coefficients;

[0131] Formula (3) indicates that the windowing operation and filtering operation do not cause energy loss of the transmitted signal;

[0132] Formula (4) represents the constraint on the PAPR value, specifically constrained to be within the threshold Q.

[0133] The characters in formula 1(1)-(4) are explained in detail as follows:

[0134] represents the stopband energy in the objective function, and Bs represents the stopband area;

[0135] e jω represents a complex exponential sequence, represents the power spectral density in the stop band of the windowed signal, H F () represents the result of Fourier transform of the kth filter, V f represents the kth filter coefficient vector f k IDFT matrix, Lf represents the length of the filter; k represents the identifier corresponding to the terminal;

[0136] w k 、f k is the optimization variable, that is, the waveform parameter pre-configured for the kth terminal, w k represents the windowing coefficient, f k Represents the filter coefficient; the expression is as follows:

[0137] Indicates that the windowing coefficients are expressed in diagonal matrix form, diag represents a diagonal matrix, Represents the windowing coefficient vector.

[0138] represents the filter in the form of a Toeplitz matrix, f k =[f k (0),…,f k (L f -1)] represents the filter coefficient vector; here, W k and F k For the convenience of matrix calculation, the window coefficient vector w k and the filter coefficient vector f k Perform mathematical transformation to obtain.

[0139] Among them, L cp Indicates the length of the added cyclic prefix (CP); N fft Indicates the number of sampling points of discrete Fourier transform (DFT) / inverse discrete Fourier transform (IDFT);

[0140] R represents the matrix to add CP, which is in the form of:

[0141] is the signal modulated by the WF-CP-OFDM waveform; B represents the total number of sub-bands, is the normalized power factor, trace() represents the matrix trace operation, and H represents the matrix transpose.

[0142] It should be noted that if the window is designed appropriately, there is no need to add CP.

[0143] pass Figure 4 The waveform parameters obtained from the structure shown are the waveform parameters of a new enhanced OFDM waveform, which can take into account both low out-of-band leakage and peak-to-average power ratio. It can not only effectively improve the system's time-frequency resource utilization and asynchronous transmission performance, but also improve the problem of nonlinear damage to the transmitted signal modulated by the new waveform at the RF end due to the inherent high PAPR of the multi-carrier system, which wastes a lot of energy and thus increases the cost of hardware equipment.

[0144] Accordingly, an embodiment of the present invention provides a communication method applied to a terminal.

[0145] Figure 5 A flow chart of another communication method provided by an embodiment of the present invention; Figure 5 As shown, the method is applied to a terminal, such as a mobile phone, a smart phone, a laptop computer, a digital broadcast receiver, a personal digital assistant (PDA), a tablet computer (PAD), a portable multimedia player (PMP), a wearable device (such as a smart bracelet, a smart watch, etc.), a navigation device, etc.; the method includes:

[0146] Step 501: Receive first information from a network device; the first information is used to indicate waveform parameters of a terminal; the first information is determined based on a first capability and / or a first resource of the terminal, where the first resource represents a resource allocated by the network device to the terminal;

[0147] Step 502: Determine waveform parameters according to the first information.

[0148] In some embodiments, the waveform parameters include: filter and / or windowing coefficients.

[0149] In practical applications, the filter may be specifically a partial frequency band filter, and the embodiment of the present invention does not limit the name of the filter.

[0150] In some embodiments, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0151] In some embodiments, the first information includes: at least one first index;

[0152] The first index is used to indicate the waveform parameters of the terminal corresponding thereto.

[0153] In some embodiments, the first information includes: a first filter, at least one second index;

[0154] The second index is used to indicate the frequency shift coefficient of the terminal corresponding thereto;

[0155] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0156] In some embodiments, the waveform parameters are configured in a semi-static manner or a dynamic manner, that is, the terminal receives the required waveform parameters in a semi-static or dynamic manner.

[0157] The receiving of the first information from the network device includes: receiving the waveform parameters in a semi-static manner or a dynamic manner.

[0158] In some embodiments, the first filter is determined by the network device according to the application scenario requirements of the cell terminal;

[0159] The first filter is applicable to a cell terminal that meets the application scenario requirements corresponding to the first filter.

[0160] An example is provided for the first index. Figure 2 As shown, no further details are given here.

[0161] An example is provided for the second index. Figure 3 As shown, no further details are given here.

[0162] Methods for determining filter and / or windowing coefficients have been described in Figure 1 The method shown is described and provided Figure 4 The structure shown will not be described in detail here.

[0163] In some embodiments, receiving first information from a network device includes:

[0164] Receive RRC signaling or DCI signaling from a network device; the RRC signaling or DCI signaling indicates the first information.

[0165] Figure 6 A schematic diagram of pre-configured waveform parameters obtained for different terminals provided in an application embodiment of the present invention; Figure 6 In the figure, Channel Bandwidth is the channel bandwidth in MHz; Channel Edge is the channel edge; Transmission Bandwidth Configuration NRB is the RB occupied by the transmission bandwidth configuration; Guardband is the protection band, and the two protection bands can be asymmetric.

[0166] like Figure 6As shown, different waveform parameters can be configured for different terminals: pre-configured waveform parameter 1 and pre-configured waveform parameter 2; wherein, the pre-configured waveform parameter 1 of terminal 1 (UE 1) occupies 4 RBs, and the pre-configured waveform parameter 2 of terminal 2 (UE 2) occupies 2 RBs.

[0167] Figure 7 A schematic diagram comparing the power spectral density of the enhanced waveform obtained by optimization and the normalized form provided in the embodiment of the present invention is shown; Figure 7 As shown in the figure, CP-OFDM is a standardized waveform, and WF-CP-OFDM is an enhanced OFDM waveform obtained by the optimization problem in this application. Figure 7 The example simulation assumes that the resource size occupied by each terminal is the same, that is, the number of subcarriers in the part of the frequency band is n. k Similarly, in actual application, the relevant parameter values ​​can be modified according to the amount of resources occupied by the terminal without any limitation.

[0168] pass Figure 7 As shown, the enhanced OFDM waveform described in the embodiment of the present invention can not only realize the configuration of different waveform parameters for different terminals compared with the existing standardized waveform CP-OFDM, but also the configured waveform parameters have better out-of-band suppression performance and higher sporadic spectrum utilization, which is more advantageous in future communication environments where spectrum resources are scarce.

[0169] Figure 8 A schematic diagram of the structure of a communication device provided by an embodiment of the present invention; the device is applied to a network device, such as Figure 8 As shown, the device includes:

[0170] A processing module, configured to determine first information according to a first capability and / or a first resource of the terminal; the first information is used to indicate a waveform parameter of the terminal; the first resource represents a resource allocated by the network device to the terminal;

[0171] A sending module is used to send the first information to the terminal.

[0172] In some embodiments, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0173] In some embodiments, the first information includes: at least one first index; wherein the first index is used to indicate a waveform parameter of a terminal corresponding thereto.

[0174] In some embodiments, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto;

[0175] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0176] In some embodiments, the processing module is further configured to determine a first filter that meets the requirements of the corresponding application scenario based on the requirements of the application scenario.

[0177] In some embodiments, the waveform parameters include: filter and / or windowing coefficients.

[0178] In some embodiments, the filter is a partial-band filter.

[0179] In some embodiments, the waveform parameters are configured in a semi-static manner or a dynamic manner.

[0180] In some embodiments, the sending module is used to send RRC signaling or DCI signaling to the terminal; the RRC signaling or DCI signaling indicates the first information.

[0181] It should be noted that the communication devices provided in the above embodiments, when implementing the corresponding communication methods, are illustrated only by the division of the aforementioned program modules. In actual applications, the aforementioned processing can be assigned to different program modules as needed, that is, the internal structure of the network device can be divided into different program modules to complete all or part of the aforementioned processing. Furthermore, the devices provided in the above embodiments and the corresponding method embodiments are based on the same concept. The specific implementation process is detailed in the method embodiments and will not be repeated here.

[0182] Figure 9 A schematic structural diagram of another communication device provided in an embodiment of the present invention; applied to a terminal; Figure 9 As shown, the device includes:

[0183] A receiving module, configured to receive first information from a network device; the first information is used to indicate waveform parameters of a terminal; the first information is determined based on a first capability and / or a first resource of the terminal, the first resource representing a resource allocated by the network device to the terminal;

[0184] A determination module is used to determine waveform parameters according to the first information.

[0185] In some embodiments, the first information includes: waveform parameters corresponding to each of the at least one terminal.

[0186] In some embodiments, the first information includes: at least one first index; wherein the first index is used to indicate a waveform parameter of a terminal corresponding thereto.

[0187] In some embodiments, the first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto;

[0188] The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

[0189] In some embodiments, the first filter is determined according to application scenario requirements.

[0190] In some embodiments, the waveform parameters include: filter and / or windowing coefficients.

[0191] In some embodiments, the filter is a partial-band filter.

[0192] In some embodiments, the receiving module is configured to receive the waveform parameters in a semi-static manner or a dynamic manner.

[0193] In some embodiments, the receiving module is used to receive RRC signaling or DCI signaling from a network device; the RRC signaling or DCI signaling indicates the first information.

[0194] It should be noted that the communication devices provided in the above embodiments, when implementing the corresponding communication methods, are illustrated only by the division of the aforementioned program modules. In actual applications, the aforementioned processing can be assigned to different program modules as needed, that is, the internal structure of the terminal can be divided into different program modules to complete all or part of the aforementioned processing. In addition, the devices provided in the above embodiments and the corresponding method embodiments are based on the same concept. The specific implementation process is detailed in the method embodiments and will not be repeated here.

[0195] Figure 10 This is a schematic diagram of the structure of the communication device provided by the embodiment of the present invention. Figure 10 As shown, the communication device 100 includes: a processor 1001 and a memory 1002 for storing a computer program that can be run on the processor;

[0196] Corresponding to the case where the communication device is applied to a network device, the processor 1001 is used to execute the computer program to: determine first information according to the first capability and / or first resource of the terminal; the first information is used to indicate the waveform parameter of the terminal; the first resource represents the resource allocated by the network device to the terminal; and send the first information to the terminal. Specifically, the network device may execute the following Figure 1 The method shown, with Figure 1 The method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0197] Corresponding to the case where the communication device is applied to a terminal, the processor 1001 is used to execute the computer program to: receive first information from a network device; the first information is used to indicate waveform parameters of the terminal; the first information is determined according to the first capability and / or first resource of the terminal, the first resource representing the resource allocated by the network device to the terminal; and determine the waveform parameters according to the first information. Specifically, the terminal may execute the following Figure 5 The method shown, with Figure 5 The communication method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0198] In actual application, the communication device 100 may further include: at least one network interface 1003. The various components in the communication device 100 are coupled together via a bus system 1004. It is understood that the bus system 1004 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 1004 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 10 In the figure, various buses are labeled as bus system 1004. There may be at least one processor 1001. The network interface 1003 is used for wired or wireless communication between the communication device 100 and other devices.

[0199] The memory 1002 in the embodiment of the present invention is used to store various types of data to support the operation of the communication device 100 .

[0200] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 1001. Processor 1001 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in processor 1001 or by software instructions. Processor 1001 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. Processor 1001 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium located in memory 1002. Processor 1001 reads information from memory 1002 and, in conjunction with its hardware, completes the steps of the above method.

[0201] In an exemplary embodiment, the communication device 100 may be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to perform the aforementioned method.

[0202] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon;

[0203] Corresponding to the computer program stored and applied to the network device, when the computer program is executed by the processor, the following is performed: determining first information according to the first capability and / or first resource of the terminal; the first information is used to indicate the waveform parameter of the terminal; the first resource represents the resource allocated by the network device to the terminal; and sending the first information to the terminal. Specifically, the network device can perform the following Figure 1 The method shown, with Figure 1 The method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0204] Corresponding to the computer program stored and applied to the terminal, when the computer program is executed by the processor, the following is performed: receiving first information from the network device; the first information is used to indicate the waveform parameters of the terminal; the first information is determined according to the first capability and / or first resource of the terminal, the first resource represents the resource allocated by the network device to the terminal; and determining the waveform parameters according to the first information. Specifically, the terminal can execute the following Figure 5 The method shown, with Figure 5 The communication method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0205] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0206] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0207] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0208] Those skilled in the art will appreciate that all or part of the steps of the above-mentioned method embodiments may be implemented by hardware associated with program instructions, and the aforementioned program may be stored in a computer-readable storage medium. When the program is executed, the program executes the steps of the above-mentioned method embodiments. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0209] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0210] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0211] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0212] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: Applied to terminals, including: Receive first information from a network device; the first information is used to indicate a waveform parameter of a terminal; the first information is determined based on a first capability and a first resource of the terminal, the first resource representing a resource allocated by the network device to the terminal; Determining waveform parameters based on the first information; the waveform parameters include: filter and windowing coefficients; The waveform parameters indicated by the first information are determined based on the first capability and first resource of the terminal, with the power spectrum density in the stop band of the transmitted signal as the optimization target, and after constraining the peak-to-average power ratio of the transmitted signal.

2. The method according to claim 1, characterized in that The first information includes: waveform parameters corresponding to each of the at least one terminal.

3. The method according to claim 1, characterized in that The first information includes: at least one first index; wherein the first index is used to indicate a waveform parameter of a corresponding terminal.

4. The method according to claim 1, wherein The first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto; The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

5. The method according to claim 4, characterized in that The first filter is determined according to application scenario requirements.

6. The method according to claim 1, characterized in that The filter is a partial-band filter.

7. The method according to claim 1, characterized in that The receiving of the first information from the network device includes: receiving the waveform parameters in a semi-static manner or a dynamic manner.

8. The method according to claim 1, characterized in that The receiving first information from the network device includes: Receive radio resource control layer RRC signaling or downlink control information DCI signaling from a network device; the RRC signaling or DCI signaling indicates the first information.

9. A communication method, characterized in that: Applicable to network equipment, including: Determining first information based on a first capability and a first resource of the terminal; the first information is used to indicate a waveform parameter of the terminal; the first resource represents a resource allocated by the network device to the terminal; sending the first information to the terminal; Wherein, the waveform parameters include: filter and windowing coefficients; The determining the first information according to the first capability and the first resource of the terminal includes: According to the first capability and the first resource of the terminal, taking the power spectrum density in the stop band of the transmitted signal as an optimization target, constraining the peak-to-average power ratio of the transmitted signal, and determining the waveform parameters indicated by the first information.

10. The method according to claim 9, characterized in that The first information includes: waveform parameters corresponding to each of the at least one terminal.

11. The method according to claim 9, characterized in that The first information includes: at least one first index; wherein the first index is used to indicate a waveform parameter of a corresponding terminal.

12. The method according to claim 9, characterized in that The first information includes: a first filter and at least one second index; wherein the second index is used to indicate a frequency shift coefficient of a terminal corresponding thereto; The waveform parameters of the corresponding terminal are obtained by multiplying the first filter and the frequency shift coefficient of the corresponding terminal.

13. The method according to claim 12, characterized in that The method further comprises: According to the application scenario requirements, a first filter is determined for the corresponding application scenario requirements.

14. The method according to claim 9, characterized in that The filter is a partial-band filter.

15. The method according to claim 9, characterized in that The waveform parameters are configured in a semi-static manner or a dynamic manner.

16. The method according to claim 9, characterized in that The sending the first information to the terminal includes: Sending radio resource control layer RRC signaling or downlink control information DCI signaling to the terminal; the RRC signaling or DCI signaling indicates the first information.

17. A communication device, characterized in that: Applicable to network equipment, including: A processing module, configured to determine first information according to a first capability and / or a first resource of the terminal; the first information is used to indicate a waveform parameter of the terminal; the first resource represents a resource allocated by the network device to the terminal; A sending module, configured to send the first information to the terminal; Wherein, the waveform parameters include: filter and windowing coefficients; The processing module is specifically used to: determine the waveform parameters indicated by the first information based on the first capability and first resource of the terminal, taking the power spectrum density in the stop band of the transmitted signal as the optimization target, constraining the peak-to-average power ratio of the transmitted signal.

18. A communication device, characterized in that: Applied to terminals, including: A receiving module, configured to receive first information from a network device; the first information is used to indicate waveform parameters of a terminal; the first information is determined based on a first capability and / or a first resource of the terminal, the first resource representing a resource allocated by the network device to the terminal; A determination module, configured to determine waveform parameters based on the first information; the waveform parameters include: filter and windowing coefficients; The waveform parameters indicated by the first information are determined based on the first capability and first resource of the terminal, with the power spectrum density in the stop band of the transmitted signal as the optimization target, and after constraining the peak-to-average power ratio of the transmitted signal.

19. A communication device, characterized in that: include: a processor and a memory for storing a computer program capable of running on the processor, Wherein, when the processor is used to run the computer program, it performs the steps of the method according to any one of claims 1 to 8; or When the processor is used to run the computer program, the processor performs the steps of the method according to any one of claims 9 to 16.

20. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented; or When the computer program is executed by a processor, the steps of the method according to any one of claims 9 to 16 are implemented.

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