Information sending method and apparatus

Abstract

Embodiments of the present application relate to the field of communications, and provide an information sending method and apparatus, which can improve the spectral efficiency of symbols. The method comprises: a sending device determines a first symbol, and sends a first symbol sequence, wherein the length of a first symbol component in the first symbol is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, a modulation and coding scheme (MCS) of the first symbol, and an error vector amplitude (EVM) of the first symbol, the end position of the first symbol component is the same as the end position of the first symbol, and the first symbol is any symbol in the first symbol sequence.

Description

Information sending method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 8, 2023, with application number 202311486841.3 and application name “A Method and Device for Sending Information”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a method and apparatus for sending information. Background Art

[0003] Due to atmospheric waveguides, ionospheric reflection and refraction, and reflections from water and terrestrial objects (such as mountains and buildings), the difference between the arrival times of the last distinguishable delayed signal and the first distinguishable delayed signal when the signal sent by the transmitting device reaches the receiving device is called maximum delay spread (MDS). MDS can cause inter-symbol interference (ISI) and inter-carrier interference (ICI).

[0004] In new radio (NR), MDS is combated by adding a cyclic prefix (CP) to symbols. Specifically, two CP lengths are used, with different users configured with one CP length to combat MDS. However, both CP lengths cannot meet the CP length requirements of different users corresponding to MDS. Furthermore, the addition of CPs incurs additional CP overhead.

[0005] Based on this, we propose a method to combat MDS by inserting a unique word (UW) into symbols. Specifically, the UW replaces some valid data in the symbol, thus implementing the CP function. The length of the UW is determined by the MDS's requirement for the CP length, meaning that the UW length can be flexibly determined based on the MDS. Furthermore, since the UW replaces valid data in the symbol, this solution does not incur any additional overhead.

[0006] However, the longer the UW is, the less valid data there is in the symbol, and thus the lower the spectrum efficiency of the symbol.

[0007] Summary of the Invention

[0008] The embodiments of the present application provide a method and apparatus for transmitting information, which can improve the spectrum efficiency of symbols.

[0009] In a first aspect, a method for transmitting information is provided. The method can be executed by a transmitting device (terminal device or network device), or by a component of the transmitting device, such as a processor, chip, or chip system of the transmitting device, or by a logic module or software that can implement all or part of the functions of the transmitting device. The method includes: determining a first symbol, wherein the length of a first symbol component in the first symbol is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the modulation and coding scheme (MCS) of the first symbol, and the error vector magnitude (EVM) of the first symbol; the end position of the first symbol component is the same as the end position of the first symbol, and the first symbol is any symbol in the first symbol sequence; and transmitting the first symbol sequence.

[0010] Based on this solution, since at least one of the symbol type, the MCS, and the EVM of the symbol is related to the anti-interference degree of the symbol, the anti-interference degree of the first symbol can be determined based on at least one of the symbol type, the MCS, and the EVM of the first symbol, and then the length of the first symbol component in the first symbol can be flexibly determined based on the anti-interference degree of the first symbol, so that the first symbol can avoid or alleviate ISI and ICI. For example, compared to the case where the anti-interference degree of the first symbol is weak, when the anti-interference degree of the first symbol is strong, the length of the first symbol component can be appropriately reduced, thereby increasing the effective data within the symbol and improving the spectral efficiency of the symbol.

[0011] In addition, it can be understood that when the valid data in the symbol is certain, the size of the effective load of the symbol sequence is negatively correlated with the spectrum efficiency; that is, the larger the effective load, the more redundant data in the symbol. Therefore, the length of the first symbol component (that is, the redundant data) in the symbol can be flexibly determined according to the size of the effective load of the first symbol sequence. For example, when the effective load of the symbol sequence is large, the length of the first symbol component can be reduced; when the effective load of the symbol sequence is small, the length of the first symbol component can be increased to avoid a decrease in spectrum efficiency (that is, the proportion of valid data in the symbol) or to improve spectrum efficiency. In one possible design, the information sending method also includes: obtaining a first unique word UW, the first symbol includes the first UW, and the starting position of the first UW is the same as the starting position of the first symbol.

[0012] In one possible design, obtaining the first UW includes: receiving first indication information, where the first indication information indicates the first UW.

[0013] In one possible design, the information sending method further includes: obtaining a second UW, the first symbol includes the second UW, and the second UW includes the first symbol component.

[0014] In one possible design, obtaining the second UW includes: receiving second indication information, where the second indication information indicates the second UW.

[0015] In a second aspect, a method for receiving information is provided, which can be executed by a receiving device (network device or terminal device), or by a component of the receiving device, such as a processor, chip, or chip system of the receiving device, or by a logic module or software that can realize all or part of the functions of the receiving device. The method includes: receiving a first symbol sequence, wherein the length of a first symbol component in a first symbol of the first symbol sequence is less than or equal to the maximum delay spread MDS corresponding to the first symbol sequence, the length of the first symbol component is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol, the end position of the first symbol component is the same as the end position of the first symbol, and the first symbol is any symbol in the first symbol sequence.

[0016] Based on this solution, since at least one of the symbol type, the MCS, and the EVM of the symbol is related to the anti-interference degree of the symbol, the anti-interference degree of the first symbol can be determined based on at least one of the symbol type, the MCS, and the EVM of the first symbol, and then the length of the first symbol component in the first symbol can be flexibly determined based on the anti-interference degree of the first symbol, so that the first symbol can avoid or alleviate ISI and ICI. For example, compared to the case where the anti-interference degree of the first symbol is weak, when the anti-interference degree of the first symbol is strong, the length of the first symbol component can be appropriately reduced, thereby increasing the effective data within the symbol and improving the spectral efficiency of the symbol.

[0017] Furthermore, it is understood that, when the effective data in a symbol is constant, the size of the symbol sequence's payload is negatively correlated with the spectral efficiency; that is, the larger the payload, the more redundant data in the symbol. Therefore, the length of the first symbol component (i.e., redundant data) in the symbol can be flexibly determined based on the size of the payload of the first symbol sequence. For example, when the symbol sequence's payload is large, the length of the first symbol component can be reduced; when the symbol sequence's payload is small, the length of the first symbol component can be increased to avoid a decrease in spectral efficiency (i.e., the proportion of effective data in the symbol) or to improve spectral efficiency.

[0018] In one possible design, the information sending method also includes: sending first indication information, the first indication information indicates a first unique UW, the first symbol includes the first UW, and the starting position of the first UW is the same as the starting position of the first symbol.

[0019] In one possible design, the information sending method also includes: sending second indication information, the second indication information indicates a second UW, the first symbol includes the second UW, and the second UW includes the first symbol component.

[0020] Among them, the technical effects brought about by any possible design of the second aspect can refer to the technical effects brought about by the corresponding design in the above-mentioned first aspect, and will not be repeated here.

[0021] In combination with the first aspect and the second aspect, in one possible design, the length of the first symbol component is less than or equal to the MDS corresponding to the first symbol sequence.

[0022] In combination with the first and second aspects, in one possible design, the length of the first symbol component is positively correlated with the size of the payload of the first symbol sequence; the length of the first symbol component is positively correlated with the size of the MCS of the first symbol; and the length of the first symbol component is negatively correlated with the size of the EVM of the first symbol.

[0023] Based on the two possible designs described above, since at least one of the symbol type, the symbol MCS, and the symbol EVM is related to the symbol's anti-interference level, the length of the first symbol component can be determined based on the first symbol's anti-interference level. That is, the extent to which the length of the first symbol component is less than the MDS corresponding to the first symbol sequence can be determined based on the first symbol's anti-interference level. This allows for avoiding or mitigating ICI and ISI while increasing the amount of data carried by the first symbol and improving the symbol's spectral efficiency, compared to a solution in which the length of the first symbol component is greater than the MDS of the first symbol sequence.

[0024] In combination with the first aspect and the second aspect, in a possible design, in the first symbol sequence, first symbol components in two adjacent symbols are the same.

[0025] Based on this possible design, it can be understood that, in two adjacent symbols, the first symbol component in the previous symbol serves as the equivalent CP of the next symbol. Therefore, the first symbol component in the previous symbol is the same as the tail data in the next symbol; and the tail data of the next symbol is the first symbol component of the next symbol. Therefore, making the first symbol components in the two adjacent symbols the same ensures that the first symbol component in the previous symbol can realize the function of being the equivalent CP of the next symbol, thereby avoiding or alleviating ISI and ICI of the next symbol.

[0026] In a possible design, in the first symbol sequence, the first UWs of two adjacent symbols are the same.

[0027] Based on this possible design, in single-carrier modulation, the header data of the modulation input will affect the tail component of the symbol. This results in that in two consecutive symbols, although the tail data of the modulation input (i.e., the first symbol component before single-carrier modulation) is the same, there is an error between the first symbol components of the two symbols obtained after single-carrier modulation. To this end, the same header data (i.e., the first UW before single-carrier modulation) is inserted into the modulation input of two consecutive symbols to reduce the error between the first symbol components of two adjacent symbols, so that the first symbol components of the two adjacent symbols are the same or approximately the same, ensuring that the first symbol component of the previous symbol can realize the function of being an equivalent CP of the next symbol, thereby avoiding the next symbol from being affected by ISI and ICI, and improving the demodulation performance.

[0028] In combination with the first and second aspects, in one possible design, the length of the first UW is related to at least one of the transmission bandwidth of the first symbol sequence, the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0029] In combination with the first aspect and the second aspect, in a possible design, the first symbol is the first symbol of a first symbol sequence, and the length of the first UW is related to the MDS corresponding to the first symbol sequence.

[0030] In combination with the first aspect and the second aspect, in a possible design, the length of the first UW is related to the MDS corresponding to the symbol preceding the first symbol.

[0031] Based on this possible design, a receiving device may receive a symbol sequence from at least one transmitting device. The first symbol in a first symbol sequence may have ISI and ICI between it and the last symbol in a symbol sequence that precedes and is continuous with the first symbol sequence in multiple symbol sequences. Therefore, when determining the length of the first UW, the impact of the symbol preceding the first symbol on the first symbol must also be considered. For example, the MDS corresponding to the symbol preceding the first symbol can be considered to prevent interference from the previous symbol on the first symbol, thereby improving demodulation performance.

[0032] In combination with the first and second aspects, in one possible design, the first UW may be a zero signal. That is, the information carried by the first UW is a zero signal. Alternatively, the receiving device may set the information carried by the first UW to 0 before performing an N-point DFT on the first symbol sequence.

[0033] Based on this possible design, since the first symbol component will be affected by the first UW during the single-carrier modulation process, the information carried by the first UW is set to 0 to reduce the impact on the first symbol component, which can reduce the error between the first symbol components in two consecutive symbols, so that the first symbol component in the previous symbol of the two consecutive symbols can realize the function of an equivalent CP of the next symbol, thereby avoiding the next symbol from being affected by ISI and ICI, and improving the demodulation performance.

[0034] In combination with the first and second aspects, in a possible design, the length of the second UW is related to the length of the first symbol component and the length of the first UW, the first symbol includes the first UW, and the starting position of the first UW is the same as the starting position of the first symbol.

[0035] In combination with the first aspect and the second aspect, in a possible design, the first symbol is the last symbol of the first symbol sequence, the second UW includes a zero signal, and the end position of the zero signal is the same as the end position of the second UW.

[0036] In combination with the first aspect and the second aspect, in one possible design, the length of the zero signal is related to at least one of the MDS corresponding to the first symbol sequence, the length of the cyclic prefix CP of the next symbol of the first symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol.

[0037] In combination with the first aspect and the second aspect, in a possible design, the length of the zero signal may be the sum of the length of the MDS corresponding to the first symbol sequence and the length of the CP of the next symbol.

[0038] Based on the above three possible designs, since the CP of the next symbol is smaller than the MDS corresponding to the first symbol sequence, the first symbol will interfere with its next symbol. Therefore, a zero signal can be set at the tail end of the second UW. This allows the zero signal and the CP of the next symbol to be used together as the equivalent CP of the next symbol, wherein at least one of the length of the CP of the next symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol is related to the anti-interference degree of the next symbol. Therefore, the length of the zero signal can be determined based on the length of the CP of the next symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol, as well as the length of the CP of the next symbol, so that the equivalent CP can avoid the interference of the first symbol on the next symbol and improve the demodulation performance.

[0039] In a third aspect, a communication device is provided for implementing various methods. The communication device may be the transmitting device in the first aspect or the receiving device in the second aspect, or a device included in the transmitting device or the receiving device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the implementation method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes one or more modules or units corresponding to the functions.

[0040] In some possible designs, the communication device may include a processing module and a transceiver module. The processing module may be configured to implement the processing functionality of any of the above aspects and any possible implementations thereof. The transceiver module may include a receiving module and a transmitting module, respectively configured to implement the receiving functionality and the transmitting functionality of any of the above aspects and any possible implementations thereof.

[0041] In some possible designs, the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0042] In a fourth aspect, a communication device is provided, comprising: a processor and a memory; the memory is configured to store computer instructions, and when the processor executes the instructions, the communication device performs the method described in any one of the aspects. The communication device may be the transmitting or receiving device described in the first or second aspect, or a device included in the transmitting or receiving device, such as a chip or chip system.

[0043] In a fifth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any aspect. The communication device can be the transmitting device in the first aspect or the receiving device in the second aspect, or a device included in the transmitting device or the receiving device, such as a chip or a chip system.

[0044] In a sixth aspect, a communication device is provided, comprising: at least one processor; the processor is configured to execute a computer program or instruction stored in a memory, so that the communication device performs the method described in any aspect. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be the transmitting device in the first aspect or the receiving device in the second aspect, or a device included in the transmitting device or the receiving device, such as a chip or a chip system.

[0045] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0046] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0047] It can be understood that when the communication device provided in any one of the third to sixth aspects is a chip, the sending action / function of the communication device can be understood as output information, and the receiving action / function of the communication device can be understood as input information.

[0048] In a seventh aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the aspects.

[0049] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the aspects.

[0050] Among them, the technical effects brought about by any design method in the third to eighth aspects can refer to the technical effects brought about by different design methods in the above-mentioned first or second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG1 is a schematic diagram of a communication system used in an embodiment of the present application;

[0052] FIG2 is a schematic diagram of a flow chart of information transmission according to an embodiment of the present application;

[0053] FIG3 is a schematic diagram of a flow chart of an implementation of a single carrier signal provided in an embodiment of the present application;

[0054] FIG4 is a schematic diagram of a cyclic prefix CP of a symbol provided in an embodiment of the present application;

[0055] FIG5 is a schematic diagram of a flow chart of an implementation of a UW provided in an embodiment of the present application;

[0056] FIG6 is a schematic diagram of a flow chart of another UW implementation applied in an embodiment of the present application;

[0057] FIG7 is a schematic diagram of a framework of another communication system applied in an embodiment of the present application;

[0058] FIG8 is a schematic diagram of a framework of another communication system applied in an embodiment of the present application;

[0059] FIG9 is a flow chart of an information sending method provided in an embodiment of the present application;

[0060] FIG10 is a diagram showing the relationship between the length of a first UW and the error between first symbol components in two consecutive symbols provided by an embodiment of the present application;

[0061] FIG11 is a schematic diagram of an EVM implementation provided in an embodiment of the present application;

[0062] FIG12 is a diagram showing the relationship between demodulation performance and UW length according to an embodiment of the present application;

[0063] FIG13 is a diagram showing the time relationship between two symbol sequences provided in an embodiment of the present application;

[0064] FIG14 is a distribution diagram of a first symbol provided in an embodiment of the present application;

[0065] FIG15 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0066] FIG16 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0067] FIG17 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the relevant technologies of the present application is first given as follows.

[0069] 1. Multipath and delay spread (DS):

[0070] Multipath is a propagation phenomenon that causes a radio signal sent by a transmitting device to reach a receiving device through two or more paths. The causes of multipath propagation include atmospheric ducting, ionospheric reflection and refraction, reflection from water bodies and / or terrestrial objects (such as mountains, buildings, etc.), etc. For example, as shown in FIG1 , a signal from a transmitting device is sent to a receiving device through two paths. The two paths include a line of sight (LOS) path and a path reflected by a building. The transmitting device in FIG1 is a base station, and the receiving device is user equipment (UE).

[0071] Because the signal transmission distances on multiple paths are different, the signals on multiple paths will arrive at the receiving device at different times. In other words, after the transmitting device sends a signal to the receiving device, the receiving device can receive multiple resolvable time-delayed signals corresponding to the signal. Among the multiple resolvable time-delayed signals received by the receiving end, the difference between the arrival time of the last delayed signal and the arrival time of the first delayed signal can be called the maximum delay spread (MDS) of the signal. The larger the MDS, the worse the quality of the signal received by the receiving device, which reduces the demodulation performance of the signal.

[0072] In addition, in the communication link, as shown in Figure 2, the transmitting device obtains a transmission signal corresponding to the data to be sent through the baseband processing module and the RF processing module at the transmitting (transport, Tx) end, and sends the transmission signal to the receiving device through the physical channel. Furthermore, after the receiving device receives the reception signal corresponding to the transmission signal, it obtains the demodulated data corresponding to the reception signal through the RF processor and baseband processor at the receiving (receive, Rx) end.

[0073] Among them, for the communication link shown in Figure 2, if the transmitting end device uses a non-Nyquist pulse shaping filter for filtering during baseband processing and radio frequency processing, MDS will also be generated.

[0074] Exemplarily, the physical channels may include: physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), etc.

[0075] 2. Discrete Fourier transform spreading orthogonal frequency division multiplexing (DFT-S-OFDM):

[0076] DFT-S-OFDM defines a signal transmitted in the time domain, which can be called a DFT-S-OFDM signal or a single-carrier signal. The implementation of a DFT-S-OFDM signal is shown in Figure 3. For the transmitting device, a serial high-rate symbol stream passes through and is connected to a serial-to-parallel (s-to-p) module, an M-point discrete Fourier transform (DFT) module, a subcarrier mapping module, an N-point inverse discrete Fourier transform (IDFT) module, and a parallel-to-serial (p-to-s) conversion module to obtain a DFT-S-OFDM symbol. The DFT-S-OFDM signal corresponding to the DFT-S-OFDM symbol is then transmitted through a digital-to-analog converter (DAC) / radio frequency (RF) module. The process of a symbol passing through an M-point DFT module, a subcarrier mapping module, and an N-point IDFT module can be called the single-carrier modulation process of the symbol.

[0077] In the process of sending high-rate symbol streams, due to the duration T of a single symbol u Much shorter than the duration T of MDS d , thus generating inter-symbol interference (ISI) and inter-carrier interference (ICI), which degrades the demodulation performance of the DFT-S-OFDM signal at the receiving end.

[0078] Based on this, a cyclic prefix (CP) can be added to each symbol so that the duration of the symbol after adding the CP is T symb Greater than or equal to T d . This reduces ISI and ICI and improves demodulation performance. Specifically, as shown in Figure 4, the last G sampling points in the symbol are copied to the beginning of the symbol, and the end position of the G sampling points at the beginning is the same as the starting position of the symbol. symb , CP duration T CP , and T u The following relationship (1) can be satisfied between them: symb =T CP +T u (1)

[0079] Among them, Tu =NT s =1 / Δf

[0080] Among them, in the above relationship (1), T s is the sampling interval, and Δf is the subcarrier spacing.

[0081] Optionally, the time length can be described by the number of sampling points. k =[x k [0],x k [1],…,x k [N-1]] T , for example, the length of CP is G, and x k The last G sampling points are copied to x k At the beginning of Right now Contains x k and CP. At this time, the following relationship (2) is satisfied between G and MDS:

[0082] Among them, N d is the number of sampling points corresponding to the MDS (or, it can also be called the length of the MDS, or, it can also be referred to as MDS for short), T d is the duration of MDS, T s is the sampling interval, is the ceiling operator.

[0083] In the new radio (NR), the basic time unit is T c The number of describes the length of time. c =1 / (4096·480·10 3 ) seconds. Specifically, in T c When the number of describes the time length, the length of CP satisfies the following relationship (3):

[0084] Among them, κ=64, is the length of one symbol, is the length of CP, l is the index number of the symbol in the subframe, is the number of symbols contained in a time slot, When the configuration index of the parameter set is μ, the number of time slots included in a subframe.

[0085] According to the above relationship (3), NR supports two types of CP lengths: normal cyclic prefix (NCP) and extended cyclic prefix (ECP). The overhead of NCP is approximately 144 / (2048+144) = 6.6%, while the overhead of ECP is approximately 512 / (2048+512) = 20%. Therefore, the overhead of ECP is much higher than that of NCP.

[0086] The CP corresponding to different values ​​of μ can satisfy the relationship shown in Table 1 below:

[0087] Table 1

[0088] It can be seen from Table 1 above that when μ=2, that is, Δf=60, ECP or NCP can be used. When μ takes a value other than 2, NCP is used.

[0089] In addition, for continuous-time signals, lossless sampling can be performed based on the Nyquist sampling theorem, that is, the original continuous-time signal can be reconstructed losslessly based on discrete-time sampling points. Assume that the transmission time of the continuous-time signal is t0 and the sampling interval is T s , then the number of sampling points is t0 / T s That is, in T s In the case of determination, the length of the continuous time signal can be described according to the number of sampling points. In the embodiment of the present application, unless otherwise specified, the length of the continuous time signal is described according to the number of sampling points.

[0090] NCP and ECP are both cell-level configurations, that is, all users in the cell are configured with the same CP length. Specifically, if there is a user whose MDS duration is less than or equal to the NCP duration T NCP (or, MDS is less than or equal to the length of NCP), then NCP is configured for all users in the cell; if there is a user whose MDS duration is greater than T NCP (or, the MDS is greater than the length of the NCP), then ECP is configured for all users in the cell.

[0091] Since the duration of a symbol is T u =1 / Δf, so combined with the above relationship (4), we can know that the duration of ECP T ECP 、T NCP 、T u The following relationship (4) can be satisfied:

[0092] For example, if a user's MDS is 20 and the symbol length is 2048, the CP length should be greater than or equal to 20 to avoid ISI and ICI. However, based on the above configuration principles, the configured CP is NCP, which means the CP length is 144. Alternatively, if a user's MDS is 120% of the NCP length, the configured CP length should be greater than or equal to 173 to avoid ISI and ICI. However, based on the above configuration principles, the configured CP is ECP, which means the CP length is 512. This makes the CP length far exceed the latency requirement, resulting in reduced spectral efficiency.

[0093] For example, if the MDS corresponding to a user is 110% of the ECP length and the symbol length is 2048, the CP length should be greater than or equal to 563 to avoid ISI and ICI. However, based on the above configuration principles, the configured CP is ECP, which means the CP length is 512. This makes the CP length less than the delay requirement, and thus cannot avoid ISI and ICI.

[0094] In addition, T ECP and T NCP are all related to Δf, where T ECP 、T NCP , Δf can satisfy the following content as shown in Table 2:

[0095] Table 2

[0096] From Table 2 above, we can see that the larger Δf is, the shorter the duration of NCP / ECP is. When Δf is 3840kHz, T ECP In millimeter-wave radar channels, the duration of MDS is typically 70ns for indoor non-line-of-sight scenarios. Therefore, even with ECP configured, ISI and ICI cannot be avoided.

[0097] In summary, based on the above configuration principles, it is impossible to configure the appropriate CP for different users. Based on this, the following two methods of configuring CP are proposed:

[0098] In one possible implementation, when the MDS is greater than the ECP, or when the MDS is greater than the NCP but less than the ECP, a supplementary cyclic prefix (SCP) is constructed based on the CP (i.e., NCP / ECP) configured for the symbol. For two consecutive symbols, the SCP of the previous symbol can be used as the equivalent CP of the next symbol, so that the sum of the CP and SCP is greater than the MDS, thereby preventing ISI and ICI.

[0099] Specifically, a unique word (UW) is inserted into the symbol, that is, part of the data in the symbol is replaced with the UW, so that the length of the symbol remains unchanged before and after the insertion of the UW.

[0100] As an example, when MDS is less than 2NCP, or MDS is less than 2ECP, 3 UWs can be inserted into the symbol, i.e. 1 st UW, 2 nd UW and 3 rd UW.

[0101] For example, as shown in FIG5(a), st pre-DFT UW, 2 nd pre-DFT UW, 3 rd Perform single carrier modulation using pre-DFT UW, pre-DFT random sequence #1, and pre-DFT random sequence #2; and obtain 1 st pre-DFT UW corresponding to 1 st UW, 2 nd pre-DFT UW corresponding to 2 nd UW, 3 rd pre-DFT UW corresponding to 3 rd UW, random sequence #1 corresponding to pre-DFT random sequence #1, random sequence #2 corresponding to pre-DFT random sequence #2.

[0102] With pre-DFT random sequence #1 and pre-DFT random sequence #2 as the symbol components of the original symbol K, 1 st pre-DFT UW, 2 nd pre-DFT UW, 3 rd After single-carrier modulation, the pre-DFT UW, pre-DFT random sequence #1, and pre-DFT random sequence #2 are modulated to obtain symbol #K`. After adding CP to symbol #K`, the symbol #K`` is obtained as an example. st UW, 2 nd UW, 3 rd The distribution of UW in the symbol #K` is shown in (b) in Figure 5. st The starting position of UW is the same as the starting position of the symbol #K`; 2 nd The end position of UW is the same as the end position of the symbol #K`; 3 rd The end position of UW is the same as the starting position of the intercepted CP, that is, the position 3 in the symbol #K` rd The symbol components after UW can all be copied to the beginning of symbol #K` as the CP of symbol #K`.

[0103] For example, the length relationship between the symbols before and after single carrier modulation can satisfy the following relationship (5):

[0104] or, or,

[0105] Among them, in relation (5), M u is the length of symbol #K, N u is the length of the symbol #K`. is the floor operator, is the rounding operator, and round(·) is the rounding operator. For the convenience of description, the following is based on the relationship between the lengths of the symbols before and after single-carrier modulation. Take this as an example to illustrate.

[0106] Optional, in a symbol, 2 nd UW and 3 rd UW has the same length, 2 nd UW and 3 rd The signals contained in UW are the same or different, and 2 nd UW and 3 rd The length of UW is greater than 1 st The length of UW.

[0107] Optionally, in two consecutive symbols, the 2 nd The length N of UW and the CP of the next symbol CP (such as N ECP 、N NCP ) is greater than or equal to the MDS corresponding to the two consecutive symbols.

[0108] For example, take two consecutive symbols as symbol #K-1`` and symbol #K`` as an example. As shown in (b) of Figure 5, the 2 nd The CP (i.e., ECP or NCP) corresponding to the symbol #K`` of UW can be used as the equivalent CP of the symbol #K`, thereby enabling the symbol #K`` to avoid ISI and ICI. That is, in this example, 2 nd UW is SCP.

[0109] Optionally, in two consecutive symbols, the 2 nd UW and the next symbol 3 rd UW are the same or approximately the same.

[0110] It should be noted that, in the embodiment of the present application, the previous symbol and the next symbol refer to a temporal sequence, that is, the previous symbol is located before the next symbol.

[0111] As another example, when MDS is greater than 2NCP, or MDS is greater than 2ECP, two UWs can be inserted into the symbol, i.e., 1 st UW and 2 nd UW. Among them, 2 nd UW includes 2 nd UW1 and 2 nd UW2.

[0112] For example, as shown in FIG6 (a), for 1 st pre-DFT UW, 2 nd Pre-DFT UW, pre-DFT random sequence #1 performs single carrier modulation; get 1 st pre-DFT UW corresponding to 1 st UW, 2 nd pre-DFT UW corresponding to 2 nd UW, random sequence #1 corresponding to pre-DFT random sequence #1.

[0113] Taking the symbol #K obtained by single carrier modulation and the symbol #K` obtained by adding CP to the symbol #K` as an example, the pre-DFT random sequence #1 is the symbol component of the symbol #K, and correspondingly, the random sequence #1 is the symbol component of the symbol #K`. st UW and 2 nd The distribution of UW in symbol #K` is shown in (b) in Figure 6. st The starting position of UW is the same as the starting position of the symbol #K`; 2 nd The end position of UW is the same as the end position of the symbol #K`. nd UW1 is located at 2 nd Before UW2.

[0114] Optionally, in two consecutive symbols, the 2 nd The length N of UW2 and the CP of the next symbol CP (such as N ECP 、N NCP ) is greater than or equal to the MDS corresponding to the two consecutive symbols.

[0115] For example, take the two consecutive symbols #K-1 and #K as an example. As shown in (b) of Figure 6, the 2 ndThe CP (i.e., ECP or NCP) corresponding to the symbol #K`` in UW2 can be used as the equivalent CP of the symbol #K`, thereby enabling the symbol #K`` to avoid ISI and ICI. That is, in this example, 2 nd UW2 is SCP.

[0116] For example, 2 nd The implementation of UW1 is similar to the 3 shown in FIG5 (such as FIG5 (a) or FIG5 (b)). rd The implementation of UW is similar. For details, please refer to the relevant description of Figure 5 above, which will not be repeated here.

[0117] In another possible implementation, a UW is inserted directly at the end of the symbol without configuring a CP. For two consecutive symbols, the UW of the previous symbol can be used as the equivalent CP of the next symbol, making the equivalent CP greater than the MDS, thereby avoiding ISI and ICI.

[0118] Specifically, insert 2 UW in the symbol, that is, 1 st UW and 2 nd UW. Among them, 2 nd UW includes 2 nd UW1 and 2 nd UW2.

[0119] For example, as shown in FIG6 (a), for 1 st pre-DFT UW, 2 nd Pre-DFT UW, pre-DFT random sequence #1 performs single carrier modulation; get 1 st pre-DFT UW corresponding to 1 st UW, 2 nd pre-DFT UW corresponding to 2 nd UW, random sequence #1 corresponding to pre-DFT random sequence #1.

[0120] The symbol component of the original symbol K is the pre-DFT random sequence #1, 1 st pre-DFT UW, 2 nd For example, the symbol #K` is obtained after the pre-DFT UW and pre-DFT random sequence #1 are modulated by a single carrier. st UW, 2 nd The distribution of UW in symbol #K` is shown in (b) in Figure 6. st The starting position of UW is the same as the starting position of the symbol #K`; 2 nd The end position of UW2 is the same as the end position of the symbol #K`, 2 ndEnd position of UW1 and 2 nd The starting position of UW2 is the same.

[0121] Optionally, in two consecutive symbols, the 2 nd UW2 is greater than the MDS corresponding to the two consecutive symbols.

[0122] For example, take two consecutive symbols as symbol #K-1` and symbol #K` as an example. As shown in (b) of FIG6 , the 2 nd UW2 can serve as an equivalent CP for symbol #K`, thereby enabling symbol #K` to avoid ISI and ICI.

[0123] However, in both of these possible implementations, to avoid ISI and ICI, the equivalent CP length must be greater than the MDS. However, since the UW does not carry valid data, a longer UW increases the corresponding overhead, resulting in less valid data within the symbol and lowering the symbol's spectral efficiency.

[0124] Based on this, an embodiment of the present application provides a method for sending information. Since at least one of the symbol type of the symbol, the modulation and coding scheme (MCS) of the symbol, and the error vector magnitude (EVM) of the symbol is related to the anti-interference degree of the symbol, the transmitting end device can determine the anti-interference degree of the first symbol according to at least one of the symbol type of the first symbol, the MCS of the first symbol, and the EVM of the first symbol, and then flexibly determine the length of the first symbol component in the first symbol according to the anti-interference degree of the first symbol, so that the first symbol can avoid or alleviate ISI and ICI. Exemplarily, compared with the case where the anti-interference degree of the first symbol is weak, when the anti-interference degree of the first symbol is strong, the length of the first symbol component can be appropriately reduced to increase the effective data in the symbol and improve the spectral efficiency of the symbol.

[0125] Furthermore, it is understood that, when the effective data in a symbol is constant, the size of the symbol sequence's payload is negatively correlated with the spectral efficiency; that is, the larger the payload, the more redundant data in the symbol. Therefore, the length of the first symbol component (i.e., redundant data) in the symbol can be flexibly determined based on the size of the payload of the first symbol sequence. For example, when the symbol sequence's payload is large, the length of the first symbol component can be reduced; when the symbol sequence's payload is small, the length of the first symbol component can be increased to avoid a decrease in spectral efficiency (i.e., the proportion of effective data in the symbol) or to improve spectral efficiency.

[0126] In the description of this application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.

[0127] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0128] In addition, to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0129] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0130] It will be understood that the “embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It will be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0131] It can be understood that in this application, "when" and "if" both mean that corresponding processing will be performed under certain objective circumstances, and do not limit the time, nor do they require any judgment action when implementing, nor do they mean that there are other limitations.

[0132] It is understood that some optional features in the embodiments of the present application may, in certain scenarios, be implemented independently of other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects. They may also be combined with other features in certain scenarios as needed. Accordingly, the devices provided in the embodiments of the present application may also implement these features or functions accordingly, which will not be described in detail here.

[0133] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various implementation methods / implementation methods / implementation methods in each embodiment, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various implementation methods / implementation methods / implementation methods in each embodiment can be combined to form new embodiments, implementation methods, implementation methods, or implementation methods according to their inherent logical relationships. The implementation methods of this application described below do not constitute a limitation on the scope of protection of this application.

[0134] The technical solutions provided in this application can be used in various communication systems, which may be 3GPP communication systems, such as 4th generation (4G) long term evolution (LTE) systems, 5G NR systems, future wireless communication systems (such as 6th generation mobile networks (6G)), vehicle to everything (V2X) systems, LTE and NR hybrid networking systems, or device to device (D2D) systems, machine to machine (M2M) communication systems, Internet of Things (IoT), and other next generation communication systems. Alternatively, the communication system may also be a non-3GPP communication system, without limitation.

[0135] Among them, the above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is uniformly described here and will not be repeated below.

[0136] 7 , which shows an exemplary communication system provided by the present application, including at least one transmitting device and at least one receiving device.

[0137] Exemplarily, the sending device may be a network device, and correspondingly, the receiving device may be a terminal device; or, the sending device may be a terminal device, and correspondingly, the receiving device may be a network device; or both the sending device and the receiving device are network devices; or both the sending device and the receiving device are terminal devices.

[0138] Specifically, as shown in Figure 8, the network device and the terminal device can perform multi-site transmission, for example, communication between network device #2, network device #3, and terminal device #3; or, the network device and the terminal device can also perform enhanced mobile broadband (eMBB) transmission, for example, communication between network device #2 and terminal device #1 and terminal device #2 respectively, or communication between network device #3 and terminal device #4 and terminal device #5 respectively; the network device and the terminal device can also perform backhaul, for example, communication between network device #1, network device #2, and network device #3; the terminal devices can also perform D2D transmission, for example, communication between terminal device #2 and terminal device #4.

[0139] Optionally, the network device is a device that connects the terminal device to the wireless network, which can be an evolutionary Node B (eNB or eNodeB) in an LTE or evolved LTE system (LTE-Advanced, LTE-A), such as a traditional macro base station eNB and a micro base station eNB in ​​a heterogeneous network scenario; or it can be a next-generation node B (gNodeB or gNB) in a 5G system; or it can be a next-generation base station in a 6G system; or it can be a transmission reception point (TRP); or it can be a base station in a future evolved public land mobile network (PLMN); or it can be a broadband network gateway (BNG), an aggregation switch or a non-3GPP access device; or it can be a wireless controller in a cloud radio access network (CRAN); or it can be an access node in a WiFi system. point, AP); or it can be a wireless relay node or a wireless backhaul node; or it can be a device that implements the base station function in IoT, a device that implements the base station function in V2X, a device that implements the base station function in D2D, or a device that implements the base station function in M2M, and the embodiments of the present application do not make specific limitations on this.

[0140] Exemplarily, the base stations in the embodiments of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), indoor stations, relay stations, access points, donor nodes, etc., and the embodiments of the present application do not make specific limitations on this.

[0141] Optionally, in a specific implementation, the network device may refer to a module or unit that performs part of the functions of the base station. For example, a centralized unit (CU), or the network device may be composed of a CU and a distributed unit (DU). The CU and DU may be divided according to the protocol layer of the wireless network. For example, the functions of the RRC protocol layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer are set in the CU, while the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer are set in the DU.

[0142] It can be understood that the division of CU and DU processing functions according to this protocol layer is only an example, and they can also be divided in other ways. This application does not make specific limitations on this.

[0143] In some embodiments, a CU may consist of a CU control plane (CU-CP) and a CU user plane (CU-UP).

[0144] Optionally, a terminal device may refer to a user-side device with wireless transceiver functions that can send signals to a network device or receive signals from a network device. A terminal device may also be referred to as user equipment (UE), terminal, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, wireless communication device, user agent, or user device. The terminal can be widely used in various scenarios, for example, it can be a wireless terminal in IoT, V2X, D2D, M2M, MTC, 5G network, or a future evolved public land mobile network (PLMN). The terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as ships); it can also be deployed in the air (such as airplanes, balloons, and satellites).

[0145] Exemplarily, the terminal device may be a drone, a helicopter, a robotic arm, an IoT device (e.g., a sensor, an electricity meter, a water meter, etc.), a V2X device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also referred to as a wearable smart device), a tablet computer or a computer with wireless transceiver function, a virtual reality (VR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a smart home control, or a wireless terminal in a smart city. The present invention relates to wireless devices in the smart office automation (OA) system, wireless devices in the smart office automation (SCS), vehicle-mounted terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, intelligent connected vehicles, drones with UAV to UAV (U2U) communication capabilities, etc. The terminal can be mobile or fixed, and this application does not make specific restrictions on this.

[0146] Optionally, the network device and the terminal device, the network device and the network device, or the terminal device and the terminal device can communicate through the authorized spectrum, or can communicate through the unlicensed spectrum, or can communicate through the authorized spectrum and the unlicensed spectrum at the same time. Optionally, the network device and the terminal device, the network device and the network device, or the terminal device and the terminal device can communicate through the spectrum below 6 gigahertz (GHz), or can communicate through the spectrum above 6 GHz, or can use the spectrum below 6 GHz and the spectrum above 6 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0147] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or may also be performed by a control subsystem that includes the network device functions. Among them, the control subsystem that includes the network device functions may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal device may also be performed by a module (such as a chip or modem) in the terminal device, or may also be performed by a device that includes the terminal device functions.

[0148] Below, with reference to the accompanying drawings, the information sending method provided by the embodiment of the present application will be described by taking the interaction between the network device and the terminal device as an example. It will be understood that in the embodiment of the present application, the network device / terminal device can perform some or all of the steps in the embodiment of the present application, and these steps or operations are merely examples. The embodiment of the present application can also perform other operations or variations of various operations. In addition, the various steps can be performed in different orders presented in the embodiment of the present application, and it is possible that not all operations in the embodiment of the present application need to be performed.

[0149] It should be noted that the message names between the devices or the names of the parameters in the messages in the following embodiments of the present application are only examples. Other names may be used in specific implementations, and the embodiments of the present application do not specifically limit this.

[0150] See Figure 9, which is a flow chart of a method for sending information provided in an embodiment of the present application. As shown in Figure 9, the method for sending information may include the following steps:

[0151] S901. The transmitting end device determines a first symbol, wherein the length of a first symbol component in the first symbol is related to at least one of a symbol type of the first symbol, a payload size of a first symbol sequence, an MCS of the first symbol, and an EVM of the first symbol; the end position of the first symbol component is the same as the end position of the first symbol; and the first symbol is any symbol in the first symbol sequence.

[0152] Optionally, the sending end device may be a terminal device, and the corresponding receiving end device may be a network device. Alternatively, the sending end device may be a network device, and the corresponding receiving end device may be a terminal device.

[0153] Exemplarily, the single-carrier modulation process includes an M-point DFT, subcarrier mapping, and an N-point IDFT. The lengths of the symbols before and after the single-carrier modulation satisfy the above relationship (5). For details, please refer to the relevant description of the above relationship (5), which will not be repeated here.

[0154] Exemplarily, the end position of the first symbol component is the same as the end position of the first symbol, which can also be understood as: the first symbol component is located at the end of the first symbol, or it can also be understood as: valid data in the first symbol is replaced by the first symbol component. The first symbol component does not carry valid data.

[0155] Optionally, the symbol type of the first symbol includes but is not limited to: a data symbol, a reference symbol, a synchronization symbol, a control symbol, and a high-reliability symbol in a shared channel.

[0156] Exemplarily, synchronization symbols include but are not limited to: primary synchronization symbols, secondary synchronization symbols; reference symbols include but are not limited to: symbols in the demodulation reference signal (DMRS) and symbols in the channel state information-reference signal (CSI-RS); control symbols include but are not limited to: symbols in PDCCH and symbols in PUCCH.

[0157] S902: The transmitting device sends a first symbol sequence to the receiving device. Accordingly, the receiving device receives the first symbol sequence from the transmitting device. Exemplarily, the transmitting device may send the first symbol sequence according to the sending process shown in FIG3 , where the first symbol sequence is the symbol sequence output by the IDFT module at point N in FIG3 . Accordingly, the receiving device may receive the first symbol sequence according to the receiving process shown in FIG3 .

[0158] Exemplarily, since the first symbol is any symbol in the first symbol sequence, it can be considered that each symbol in the first symbol sequence includes a first symbol component.

[0159] An embodiment of the present application provides a method for sending information. Since at least one of the symbol type, the MCS, and the EVM of a symbol is related to the anti-interference degree of the symbol, the transmitting end device can determine the anti-interference degree of the first symbol based on at least one of the symbol type, the MCS, and the EVM of the first symbol, and then flexibly determine the length of the first symbol component in the first symbol based on the anti-interference degree of the first symbol, so that the first symbol can avoid or alleviate ISI and ICI. For example, compared with the case where the anti-interference degree of the first symbol is weak, when the anti-interference degree of the first symbol is strong, the length of the first symbol component can be appropriately reduced to increase the effective data within the symbol and improve the spectral efficiency of the symbol.

[0160] Furthermore, it is understood that, when the effective data in a symbol is constant, the size of the symbol sequence's payload is negatively correlated with the spectral efficiency; that is, the larger the payload, the more redundant data in the symbol. Therefore, the length of the first symbol component (i.e., redundant data) in the symbol can be flexibly determined based on the size of the payload of the first symbol sequence. For example, when the symbol sequence's payload is large, the length of the first symbol component can be reduced; when the symbol sequence's payload is small, the length of the first symbol component can be increased to avoid a decrease in spectral efficiency (i.e., the proportion of effective data in the symbol) or to improve spectral efficiency.

[0161] The above is an overall introduction to the information sending method in an embodiment of the present application. The following is a detailed introduction to the "first symbol component" involved in the embodiment of the present application.

[0162] Optionally, the first symbol component may be UW. Exemplarily, for two consecutive symbols, the first symbol component of the previous symbol may be used as the equivalent CP of the next symbol.

[0163] It should be noted that, in the embodiment of the present application, the previous symbol and the next symbol refer to a temporal relationship, that is, the previous symbol is located before the next symbol; for example, the end position of the previous symbol is the same as the starting position of the next symbol.

[0164] Optionally, the length of the first symbol component is less than or equal to the MDS corresponding to the first symbol sequence. Exemplarily, the MDS corresponding to the first symbol sequence can also be understood as: the MDS corresponding to the first symbol.

[0165] For example, due to the insertion of UW in the symbol, and under a certain spectrum efficiency, the longer the length of the first symbol component (i.e., the increase in UW overhead) can be equivalent to an increase in the code rate. For example, the symbol adopts DFT-s-OFDM 16-quadrature amplitude modulation (QAM), Δf = 3840kHz, N = 512, M = 180. The codec adopts low-density parity check code, pre-DFT UW (pre-DFT UW includes 1 st pre-DFT UW, 2 nd pre-DFT UW, 3 rd pre-DFT UW) is zero signal, CP length N CP =36, tapped delay line-B channel, static channel, MDS = 14 ns (or sampling point representation: MDS = 144), channel considering ideal channel estimation, using frequency domain single-tap minimum mean square error equalization as an example, the bit error rate (block error rate, BLER) corresponding to different coding rates (coding rate, CR) can be shown in Figure 10.

[0166] In Figure 10 , the horizontal axis represents the signal-to-interference-plus-noise ratio (SNR), and the vertical axis represents the BLER. When CR = 0.5, the length of the corresponding first symbol component is 36; when CR = 0.58, the length of the corresponding first symbol component is 72; when CR = 0.63, the length of the corresponding first symbol component is 108; and when CR = 0.69, the length of the corresponding first symbol component is 144. In other words, in the cases of CR = 0.5, CR = 0.58, and CR = 0.63, ICI and ISI cannot be avoided because the length of the first symbol component is smaller than the MDS. In the case of CR = 0.69, ICI and ISI can be avoided because the length of the first symbol component is equal to the MDS.

[0167] As can be seen from Figure 10, under the same BLER (i.e., the same demodulation performance), the SNR required for CR = 0.69 is the highest, and the SNR required when CR = 0.58 and the SNR required when CR = 0.63 are both smaller than the SNR required when CR = 0.5; that is, when the length of the first symbol component is less than MDS, the demodulation performance of the first symbol is better, compared to when the length of the first symbol component is greater than or equal to MDS.

[0168] Furthermore, taking the first symbol's anti-interference level as 0 as an example, if the length of the first symbol component is equal to the MDS corresponding to the first symbol sequence, ISI and ICI caused by the MDS can be offset. However, in reality, symbols themselves have a certain degree of anti-interference ability, that is, they can withstand a certain degree of interference. Therefore, the length of the first symbol component can be appropriately reduced, so that it is less than or equal to the MDS corresponding to the first symbol sequence.

[0169] It is understandable that at least one of the symbol type, the MCS, and the EVM of the symbol is related to the anti-interference degree of the symbol. Therefore, the length of the first symbol component can be determined based on the anti-interference degree of the first symbol, that is, the degree to which the length of the first symbol component is less than the MDS corresponding to the first symbol sequence is determined based on the anti-interference degree of the first symbol. This can avoid or mitigate ICI and ISI while increasing the amount of data carried by the first symbol compared to a solution in which the length of the first symbol component is greater than the MDS of the first symbol sequence.

[0170] The following describes in detail the relationship between the length of the first symbol component and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0171] Optionally, because reference symbols, synchronization symbols, control symbols, and high-reliability symbols are able to tolerate a lower degree of interference than data symbols, when the first symbol is a reference symbol, synchronization symbol, control symbol, and / or high-reliability symbol, the length of the first symbol component may be greater than the length of the first symbol component when the first symbol is a data symbol. In other words, when the first symbol is a reference symbol, synchronization symbol, control symbol, and / or high-reliability symbol, the length of the first symbol component is less than the MDS corresponding to the first symbol sequence, which is less than the length of the first symbol component when the first symbol is a data symbol.

[0172] Optionally, symbols using different MCSs can accept different degrees of interference resistance. Specifically, compared to the case where the MCS is greater than the first preset threshold, the interference that the symbol can accept is stronger when the MCS is less than or equal to the first preset threshold. Therefore, the length of the first symbol component when the MCS is less than or equal to the first preset threshold can be less than the length of the first symbol component when the MCS is less than or equal to the first preset threshold. That is, when the MCS is less than or equal to the first preset threshold, the length of the first symbol component is less than the MDS corresponding to the first symbol sequence, which is greater than the length of the first symbol component when the MCS is greater than the first preset threshold. Therefore, it can also be considered that the length of the first symbol component is positively correlated with the size of the MCS of the first symbol.

[0173] Exemplary modulation methods include, but are not limited to, pulse amplitude modulation (PAM), phase shift keying (PSK), and quadrature amplitude modulation (QAM). PSK includes, but is not limited to, binary phase shift keying (BPSK), π / 2-BPSK, quadrature phase shift keying (QPSK), and amplitude phase shift keying (APSK). QAM includes, but is not limited to, offset quadrature amplitude modulation (OQAM).

[0174] It is understood that the EVM of a QAM / PSK modulated signal is often used to measure signal quality. EVM is defined as the ratio of the amplitude of the error vector to the amplitude of the reference signal (RS). That is, EVM satisfies the following relationship (6):

[0175] In the above relationship (6), P is the number of symbols in the QAM / PSK modulated signal, r(k) is RS, z(k) is the observed signal (i.e., QAM / PSK modulated signal), and z(k)-r(k) is the amplitude error between the QAM / PSK modulated signal and RS. Specifically, the phase error between the QAM / PSK modulated signal and RS is In the case of , the amplitude error is shown in Figure 11.

[0176] In addition, taking PDSCH as an example, the correspondence between different modulation modes and EVM may include the content shown in the following Table 3:

[0177] Table 3

[0178] Since the modulation order for QPSK is 2, the modulation order for 16QAM is 4, the modulation order for 64QAM is 6, and the modulation order for 256QAM is 8, as shown in Table 3, the lower the modulation order, the greater the required EVM. Therefore, it can be considered that the length of the first symbol component is negatively correlated with the EVM of the first symbol.

[0179] Specifically, the acceptable degree of interference resistance of symbols with different EVMs is different. Among them, compared with the case where the EVM is less than or equal to the second preset threshold, the interference that the symbol can accept is stronger when the EVM is greater than the second preset threshold. Therefore, the length of the first symbol component when the EVM is greater than the first preset threshold can be smaller than the length of the first symbol component when the EVM is less than or equal to the second preset threshold. In other words, when the EVM is greater than the first preset threshold, the length of the first symbol component is smaller than the MDS corresponding to the first symbol sequence, which is greater than the MCS greater than the EVM is less than or equal to the second preset threshold.

[0180] It's understandable that the size of the first symbol sequence's payload is related to spectral efficiency. For example, assuming the first symbol sequence is PDSCH, with the length of the first symbol sequence represented by the number of sampling points, the first symbol sequence includes 10 symbols, and the length of the first symbol component is 1, if the payload of the first symbol sequence is 1000, the spectrum efficiency loss is 1%; if the payload of the first symbol sequence is 100, the spectrum efficiency loss is 10%. In other words, given a certain length of the first symbol component, the larger the payload of the first symbol sequence, the smaller the spectrum efficiency loss. Therefore, to maintain relatively constant spectral efficiency, different lengths of first symbol components can be selected for symbol sequences with different payloads. For example, if the payload of the first symbol sequence is larger, the length of the first symbol component can be larger than the length of the first symbol component when the payload is smaller. Therefore, it can also be considered that the size of the first symbol sequence's payload is positively correlated with the length of the first symbol component.

[0181] Optionally, in the first symbol sequence, the first symbol components of two adjacent symbols are the same. Exemplarily, since the first symbol component of the first symbol of two adjacent symbols serves as the equivalent CP of the second symbol, the first symbol component of the first symbol is the same as the tail data of the second symbol; and the tail data of the second symbol is the first symbol component of the second symbol. Therefore, making the first symbol components of the two adjacent symbols the same ensures that the first symbol component of the first symbol can function as the equivalent CP of the second symbol, thereby preventing the second symbol from being affected by ISI and ICI, and improving demodulation performance.

[0182] However, in single-carrier modulation, the header data in the symbol will affect the single-carrier modulation result of the tail data of the symbol. Since the header data in each symbol is different, the first symbol component in each symbol after single-carrier modulation is different, that is, the error between the first symbol components in two consecutive symbols is large (or it can also be understood as a small similarity). Based on this, in an embodiment of the present application, the header data in the symbol can be replaced by the first UW, and the same first UW can be inserted into two consecutive symbols to reduce the error between the first symbol components in two consecutive symbols. That is, the first symbol also includes the first UW. And in the first symbol sequence, the first UWs in two adjacent symbols are the same. Among them, the starting position of the first UW is the same as the starting position of the first symbol. Exemplarily, the transformation relationship of the length of the first UW before and after single-carrier modulation is shown in the above relationship (5). For details, please refer to the relevant description of the above relationship (5), which will not be repeated here.

[0183] Optionally, before step S901, the signal sending method further includes step S900A:

[0184] S900A: The sending device obtains a first UW.

[0185] As a possible implementation, when the transmitting device is a terminal device and the receiving device is a network device, the network device sends first indication information to the terminal device. Accordingly, the terminal device receives the first indication information from the network device. The first indication information indicates a first UW. That is, the transmitting device obtaining the first UW includes: the transmitting device receiving the first indication information from the receiving device.

[0186] Exemplarily, the first indication information may indicate the length of the first UW (or the length of the first UW before single-carrier modulation), the starting position and the ending position of the first UW, information carried by the first UW, and the like.

[0187] Optionally, the first indication information can carry any one of radio resource control (RRC) signaling, media access control layer control element (MAC-CE) signaling, and downlink control information (DCI).

[0188] As another possible implementation manner, when the transmitting end device is a network device and the corresponding receiving end device is a terminal device, the network device determines the first UW.

[0189] Based on the above two possible implementations, it can be seen that no matter the sending end is a terminal device or a network device, the first UW is determined by the network device. For example, the network device can determine the first UW based on the following three scenarios:

[0190] Scenario 1: The first symbol is an intermediate symbol in the first symbol sequence, that is, the first symbol is any symbol in the first symbol sequence except the first symbol and the last symbol.

[0191] Exemplarily, taking the case where the first symbol sequence includes 10 symbols and the sequence numbers of the 10 symbols are 0-9, the first symbol may be a symbol corresponding to any sequence number of 1-8.

[0192] Optionally, in the following scenario, the length of the first UW is related to at least one of the transmission bandwidth of the first symbol sequence, the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0193] Exemplarily, the length of the first UW is less than the transmission bandwidth corresponding to the first symbol sequence. Exemplarily, the transmission bandwidth corresponding to the first symbol sequence can also be referred to as the value of the number M of sampling points in the M-point DFT module in single-carrier modulation.

[0194] For example, taking the case where the length of the first UW before single-carrier modulation is a, the transmission bandwidth of the first symbol sequence is M, and M is 480, the number of sampling points N in the N-point IDFT module is 2048, the first symbol sequence uses QPSK modulation, and the length of the first symbol component and the length of the MDS corresponding to the first symbol sequence are both 200, the relationship between the transmission bandwidth, the length of the first UW, and the error between the first symbol components of two consecutive symbols is shown in Figure 12. The horizontal axis of Figure 12 represents the error threshold, and the vertical axis represents the probability that the error between the first symbol components of two consecutive symbols exceeds the error threshold. A value of a of 0% of M indicates that the length of the first UW is zero, meaning that the first UW is not used to replace the header data of the first symbol. As shown in Figure 12, the larger the value of a, the smaller the probability that the error between the first symbol components of two consecutive symbols exceeds the error threshold, and the larger the value of a, the smaller the error threshold; in other words, the larger the value of a, the smaller the error between the first symbol components of two consecutive symbols.

[0195] Therefore, on the basis that the length of the first UW is less than the transmission bandwidth, the proportion of the length of the first UW in the transmission bandwidth can be appropriately adjusted. For example, the proportion of the length of the first UW in the transmission bandwidth can be increased to reduce the error between the first symbol components of two consecutive symbols, so that the first symbol component of the first symbol of the two consecutive symbols can realize the function of an equivalent CP of the latter symbol, thereby avoiding the latter symbol from being affected by ISI and ICI, and improving the demodulation performance.

[0196] Specifically, the proportion of the length of the first UW in the transmission bandwidth can be determined according to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0197] Exemplarily, the relationship between the proportion of the first UW in the transmission bandwidth and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol is similar to the relationship between the length of the above-mentioned first symbol component and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol. For details, please refer to the relevant description of the above-mentioned first symbol component and will not be repeated here.

[0198] Scenario 2: The first symbol is the first symbol in the first symbol sequence. For example, taking the first symbol sequence including 10 symbols, and the sequence numbers of the 10 symbols are 0-9, the first symbol may be the symbol with sequence number 0.

[0199] As an example, when the transmitting end is a terminal device, the length of the first UW is related to at least one of the transmission bandwidth of the first symbol sequence, the MDS corresponding to the previous symbol of the first symbol, the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0200] Optionally, in this example, a receiving device may receive a symbol sequence from at least one transmitting device, where ISI and ICI exist between the first symbol of the first symbol sequence and the last symbol of a symbol sequence that precedes the first symbol sequence and is continuous with the first symbol sequence in multiple symbol sequences. For example, as shown in (a) of FIG13 , the time taken by the receiving device to receive the first symbol sequence and the symbol sequence containing the previous symbol, respectively. Therefore, when determining the length of the first UW, the impact of the previous symbol on the first symbol must also be considered.

[0201] Optionally, the symbol preceding the first symbol may be understood as the last symbol in another symbol sequence preceding the first symbol sequence. Exemplarily, the another symbol sequence may be sent by a transmitting device to a receiving device, or may be sent by another transmitting device other than the transmitting device to the receiving device.

[0202] Exemplarily, the length of the first UW may be the larger value of the length of the first UW#1 and the length of the second UW#2. The length of the first UW#1 is determined based on the transmission bandwidth of the first symbol sequence, i.e., the length of the first UW#1 is smaller than the transmission bandwidth of the first symbol sequence; the length of the second UW#2 is determined based on the MDS corresponding to the symbol preceding the first symbol, i.e., the length of the first UW#2 is smaller than the MDS corresponding to the symbol preceding the first symbol.

[0203] Among them, the extent to which the length of the first UW is smaller than the transmission bandwidth of the first symbol sequence (or, the proportion of the length of the first UW#1 in the transmission bandwidth; or, the extent to which the length of the first UW is smaller than the MDS corresponding to the previous symbol of the first symbol) is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0204] Specifically, the relationship between the extent to which the length of the first UW is less than the transmission bandwidth of the first symbol sequence (or the length of the first UW is less than the MDS corresponding to the previous symbol of the first symbol) and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol is similar to the relationship between the length of the above-mentioned first symbol component and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol. For details, please refer to the relevant description of the above-mentioned first symbol component and will not be repeated here.

[0205] As another example, when the transmitting end is a network device, the length of the first UW is related to at least one of the transmission bandwidth of the first symbol sequence, the MDS corresponding to the first symbol sequence, the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0206] Optionally, in this example, a transmitting device may send multiple symbol sequences to at least one receiving device, where ISI and ICI exist between the first symbol of the first symbol sequence and the last symbol of the symbol sequence that precedes and is continuous with the first symbol sequence in the multiple symbol sequences. For example, as shown in (b) of FIG13 , the time at which the transmitting device sends the first symbol sequence and the symbol sequence containing the previous symbol, respectively. Therefore, when determining the length of the first UW, the impact of the previous symbol of the first symbol on the first symbol must also be considered.

[0207] Exemplarily, the length of the first UW may be the larger value of the first UW#1 and the second UW#3. The first UW#1 is determined based on the transmission bandwidth of the first symbol sequence, i.e., the first UW#1 is smaller than the transmission bandwidth of the first symbol sequence; and the second UW#3 is determined based on the MDS corresponding to the first symbol sequence.

[0208] Among them, the extent to which the length of the first UW is smaller than the transmission bandwidth of the first symbol sequence (or, the proportion of the length of the first UW#1 in the transmission bandwidth; or, the extent to which the length of the first UW is smaller than the MDS corresponding to the first symbol sequence) is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0209] Specifically, the relationship between the extent to which the length of the first UW is less than the transmission bandwidth of the first symbol sequence (or the length of the first UW is less than the MDS corresponding to the first symbol sequence) and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol is similar to the relationship between the length of the above-mentioned first symbol component and at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol. For details, please refer to the relevant description of the above-mentioned first symbol component and will not be repeated here.

[0210] Scenario 3: The first symbol is the last symbol in the first symbol sequence. For example, if the first symbol sequence includes 10 symbols and the sequence numbers of the 10 symbols are 0-9, the first symbol may be the symbol with sequence number 9.

[0211] For example, in scenario three, the implementation method of the first UW is the same as the implementation method of the first UW in the above scenario one. For details, please refer to the relevant description in the above scenario one, which will not be repeated here.

[0212] Optionally, based on the above two scenarios, the first UW may be a zero signal. That is, the information carried by the first UW is a zero signal. Alternatively, the receiving device may set the information carried by the first UW to 0 before performing an N-point DFT on the first symbol sequence.

[0213] Based on this optional scheme, since the first symbol component will be affected by the first UW during the single-carrier modulation process, the information carried by the first UW is set to 0 to reduce the impact on the first symbol component, which can reduce the error between the first symbol components in two consecutive symbols, so that the first symbol component in the first symbol of the two consecutive symbols can realize the function of an equivalent CP of the latter symbol, thereby avoiding the latter symbol from being affected by ISI and ICI, and improving the demodulation performance.

[0214] Optionally, the first symbol further includes a second UW, wherein the second UW includes the first symbol component. That is, the end position of the second UW is the same as the end position of the first symbol.

[0215] Exemplarily, since the length of the first symbol component is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol, it can be considered that the length of the second UW is also related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol.

[0216] Exemplarily, the transformation relationship of the length of the second UW before and after single-carrier modulation is shown in the above relationship (5). For details, please refer to the relevant description of the above relationship (5), which will not be repeated here.

[0217] Optionally, the second UW includes a second UW#1 and a second UW#2, where the second UW#1 is the first symbol component. The second UW#2 is located before the second UW#1, or in other words, the end position of the second UW#2 is the same as the start position of the second UW#1. For example, the distribution of the second UW#1 and the second UW#2 in the first symbol is shown in FIG14.

[0218] Optionally, before step S901, the signal sending method further includes: step S900B:

[0219] S900B: The sending device obtains the second UW.

[0220] As a possible implementation, when the transmitting device is a terminal device and the receiving device is a network device, the network device sends second indication information to the terminal device. Accordingly, the terminal device receives the second indication information from the network device. The second indication information indicates a second UW. That is, the transmitting device obtaining the second UW includes: the transmitting device receiving the second indication information from the receiving device.

[0221] Exemplarily, the second indication information may indicate the length of the second UW (or the length of the second UW before single-carrier modulation), the starting position and the ending position of the second UW, information carried by the second UW, and the like.

[0222] Optionally, the second indication information can be carried in any one of RRC signaling, MAC-CE signaling, and DCI.

[0223] Optionally, the first indication information and the second indication information may be carried in the same signaling, or the first indication information and the second indication information may be carried in different signaling.

[0224] As another possible implementation manner, when the transmitting end device is a network device and the corresponding receiving end device is a terminal device, the network device determines the second UW.

[0225] Based on the above two possible implementations, it can be seen that no matter whether the sending end is a terminal device or a network device, the second UW is determined by the network device. Exemplarily, the network device can determine the second UW based on the following three scenarios:

[0226] Scenario 1: The first symbol is an intermediate symbol in the first symbol sequence, that is, the first symbol is any symbol in the first symbol sequence except the first symbol and the last symbol.

[0227] Optionally, in the following scenario, the length of the second UW is related to the length of the first symbol component and the length of the first UW. Exemplarily, the length of the second UW may be the sum of the first symbol component and the first UW. In this case, the length of the second UW may also be greater than the length of the MDS corresponding to the first symbol sequence.

[0228] Specifically, the implementation of the first symbol component can refer to the relevant description of the first symbol component above, and the implementation of the first UW can refer to the relevant description of the first UW in the above scenario 1, which will not be repeated here.

[0229] Scenario 2: The first symbol is the first symbol in the first symbol sequence. For example, in scenario 2, the implementation of the second UW is similar to the implementation of the second UW in scenario 1 above. For details, please refer to the relevant description of the second UW in scenario 1 above, which will not be repeated here.

[0230] Scenario 3: The first symbol is the last symbol in the first symbol sequence.

[0231] Optionally, in scenario three, a receiving device may receive a symbol sequence from at least one transmitting device. The first symbol, which is the last symbol in a first symbol sequence, may have ISI and ICI between it and the first symbol in a symbol sequence that follows and is continuous with the first symbol sequence in multiple symbol sequences. Therefore, when determining the length of the second UW, the impact of the first symbol on its next symbol must also be considered.

[0232] Optionally, the next symbol of the first symbol can be understood as the first symbol in another symbol sequence following the first symbol sequence. Exemplarily, the another symbol sequence can be sent by the transmitting device to the receiving device, or can also be sent by another transmitting device other than the transmitting device to the receiving device.

[0233] Optionally, based on the characteristics of the next symbol, it is determined whether the first symbol will cause interference to the next symbol, and then it is determined whether the interference of the first symbol to the next symbol needs to be reduced.

[0234] Exemplarily, the characteristics of the next symbol may include the following five forms: (1) the next symbol has a CP, and the CP of the next symbol is greater than the length of the MDS corresponding to the first symbol sequence; (2) the next symbol has a CP, the CP of the next symbol is less than the length of the MDS corresponding to the first symbol sequence, and the next symbol has a certain degree of anti-interference; (3) the next symbol has no CP, and the next symbol can resist the interference of the first symbol; (4) the next symbol has a CP, the CP of the next symbol is less than the length of the MDS corresponding to the first symbol sequence, and the next symbol cannot resist the interference of the first symbol; (5) the next symbol has no CP, and the next symbol cannot resist the interference of the first symbol.

[0235] For example, when the characteristics of the next symbol are in the three forms (1), (2), and (3) above, the next symbol can resist the interference from the first symbol, so it can be considered that the first symbol will not interfere with the next symbol, and further it can be considered that there is no need to reduce the interference of the first symbol on the next symbol. When the characteristics of the next symbol are in the two forms (4) and (5) above, the next symbol cannot resist the interference from the first symbol, so it can be considered that the first symbol will interfere with the next symbol, and further it can be considered that there is a need to reduce the interference of the first symbol on the next symbol.

[0236] Optionally, when it is necessary to reduce the interference of the first symbol with the next symbol, the length of the second UW is related to the length of the first symbol component and the length of the first UW. Exemplarily, the length of the second UW may be the sum of the first symbol component and the first UW. In this case, the length of the second UW may also be greater than the length of the MDS corresponding to the first symbol sequence.

[0237] Specifically, the implementation of the first symbol component can refer to the relevant description of the first symbol component above, and the implementation of the first UW can refer to the relevant description of the first UW in the above scenario 1, which will not be repeated here.

[0238] Optionally, in the case where the interference of the first symbol to the next symbol needs to be reduced, the second UW includes a zero signal, wherein the end position of the zero signal is the same as the end position of the second UW.

[0239] Optionally, the length of the zero signal is related to at least one of the MDS corresponding to the first symbol sequence, the length of the CP of the next symbol of the first symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol.

[0240] Exemplarily, the length of the zero signal may be the sum of the length of the MDS corresponding to the first symbol sequence and the length of the CP of the next symbol.

[0241] Based on this optional solution, since the CP of the next symbol is smaller than the MDS corresponding to the first symbol sequence, the first symbol will interfere with the next symbol. Therefore, a zero signal can be set at the tail end of the second UW. This allows the zero signal and the CP of the next symbol to be used together as the equivalent CP of the next symbol, wherein at least one of the length of the CP of the next symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol is related to the anti-interference degree of the next symbol. Therefore, the length of the zero signal can be determined based on the length of the CP of the next symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol, as well as the length of the CP of the next symbol, so that the equivalent CP can avoid the interference of the first symbol on the next symbol and improve the demodulation performance.

[0242] It can be understood that in each of the above embodiments, the methods and / or steps implemented by the first sending device or the first receiving device (i.e., terminal device or network device) can also be implemented by components that can be used for any one of the first sending device or the first receiving device (such as a processor, chip, chip system, circuit, logic module, or software such as a chip or circuit).

[0243] The above mainly introduces the solutions provided by this application. Correspondingly, this application also provides a communication device, which is used to implement the above various methods.

[0244] The communication device can be the above-mentioned first sending end device or first receiving end device in the above-mentioned method embodiment, or a device including the first sending end device or the first receiving end device, or a component that can be used for any one of the above-mentioned first sending end device or the first receiving end device, such as a chip or a chip system.

[0245] It is understandable that, in order to realize the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0246] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0247] 15 shows a schematic structural diagram of a communication device 150. The communication device 150 includes a processing module 1501 and a transceiver module 1502. The communication device 150 can be used to implement the functions of the first transmitting end device or the first receiving end device described above.

[0248] In some embodiments, the communication device 150 may further include a storage module (not shown in FIG. 15 ) for storing program instructions and data.

[0249] In some embodiments, the transceiver module 1502, which may also be referred to as a transceiver unit, is configured to implement a transmitting and / or receiving function. The transceiver module 1502 may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0250] In some embodiments, the transceiver module 1502 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the above-mentioned first sending end device or the first receiving end device in the above-mentioned method embodiment, and / or used to support other processes of the technology described in this document; the processing module 1501 may be used to execute the processing steps (such as determination, generation, etc.) performed by the above-mentioned first sending end device or the first receiving end device in the above-mentioned method embodiment, and / or used to support other processes of the technology described in this document.

[0251] When the communication device 150 is used to implement the functions of the first transmitting end device (terminal device or network device):

[0252] In some embodiments, the processing module 1501 is used to determine the first symbol, the length of the first symbol component in the first symbol is less than or equal to the MDS corresponding to the first symbol sequence, the length of the first symbol component is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol, the end position of the first symbol component is the same as the end position of the first symbol, and the first symbol is any symbol in the first symbol sequence; the transceiver module 1502 is used to send the first symbol sequence.

[0253] Optionally, the processing module 1501 is further configured to obtain a first UW, where the first symbol includes the first UW, and a starting position of the first UW is the same as a starting position of the first symbol.

[0254] Optionally, the transceiver module 1502 is further configured to receive first indication information, where the first indication information indicates a first UW.

[0255] Optionally, the processing module 1501 is further configured to obtain a second UW, where the first symbol includes the second UW, and the second UW includes a component of the first symbol.

[0256] Optionally, the transceiver module 1502 is further configured to receive second indication information, where the second indication information indicates a second UW.

[0257] When the communication device 150 is used to implement the functions of the first receiving device (network device or terminal device):

[0258] In some embodiments, the transceiver module 1502 is used to receive a first symbol sequence, the length of the first symbol component in the first symbol of the first symbol sequence is related to at least one of the symbol type of the first symbol, the size of the payload of the first symbol sequence, the MCS of the first symbol, and the EVM of the first symbol, the end position of the first symbol component is the same as the end position of the first symbol, and the first symbol is any symbol in the first symbol sequence.

[0259] Optionally, the transceiver module 1502 is further configured to send first indication information, where the first indication information indicates a first UW.

[0260] Optionally, the transceiver module 1502 is further configured to send second indication information, where the second indication information indicates a second UW.

[0261] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0262] In the present application, the communication device 150 may be presented in the form of functional modules divided in an integrated manner. The "module" here may refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0263] In some embodiments, when the communication device 150 in Figure 15 is a chip or a chip system, the function / implementation process of the transceiver module 1502 can be implemented through the input and output interface (or communication interface) of the chip or chip system, and the function / implementation process of the processing module 1501 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0264] Since the communication device 150 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiments and will not be repeated here.

[0265] As a possible product form, the transmitting device or receiving device described in the embodiments of the present application can also be implemented using the following: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout this application.

[0266] As another possible product form, the transmitting device and receiving device of the embodiment of the present application can be implemented by a general bus architecture. For ease of explanation, refer to Figure 16, which is a structural diagram of a communication device 1600 provided in an embodiment of the present application. The communication device 1600 includes a processor 1601 and a transceiver 1602. The communication device 1600 can be a transmitting device or a receiving device, or a chip or chip system therein. Figure 16 only shows the main components of the communication device 1600. In addition to the processor 1601 and the transceiver 1602, the communication device may further include a memory 1603, and an input and output device (not shown).

[0267] Optionally, processor 1601 is primarily used to process communication protocols and communication data, as well as control the entire communication device, execute software programs, and process software program data. Memory 1603 is primarily used to store software programs and data. Transceiver 1602 may include a radio frequency circuit and an antenna. The radio frequency circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0268] Optionally, the processor 1601 , the transceiver 1602 , and the memory 1603 may be connected via a communication bus.

[0269] When the communication device is powered on, the processor 1601 can read the software program in the memory 1603, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1601 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1601. The processor 1601 converts the baseband signal into data and processes the data.

[0270] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0271] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 150 may take the form of the communication device 1600 shown in FIG. 15 .

[0272] As an example, the functions / implementation process of the processing module 1501 in FIG15 can be implemented by the processor 1601 in the communication device 1600 shown in FIG16 calling the computer-executable instructions stored in the memory 1603. The functions / implementation process of the transceiver module 1502 in FIG15 can be implemented by the transceiver 1602 in the communication device 1600 shown in FIG16.

[0273] As another possible product form, the transmitting device or receiving device in this application may adopt the structure shown in Figure 15, or include the components shown in Figure 17. Figure 17 is a schematic diagram of the composition of a communication device 1700 provided in this application. The communication device 1700 can be a transmitting device or a receiving device, or a chip or system on a chip in the transmitting device or the receiving device.

[0274] As shown in FIG17 , the communication device 1700 includes at least one processor 1701 and at least one communication interface ( FIG17 is merely an example of one communication interface 1704 and one processor 1701). Optionally, the communication device 1700 may further include a communication bus 1702 and a memory 1703.

[0275] Processor 1701 can be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 1701 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0276] Communication bus 1702 is used to connect the various components in communication device 1700, enabling communication between them. Communication bus 1702 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, for example. This bus can be categorized as an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG17 shows a single thick line, but this does not imply that there is only one bus or type of bus.

[0277] Communication interface 1704 is used to communicate with other devices or communication networks. Exemplarily, communication interface 1704 can be a module, circuit, transceiver, or any other device capable of communication. Optionally, communication interface 1704 can also be an input / output interface within processor 1701, used to implement signal input and output to the processor.

[0278] The memory 1703 may be a device with a storage function, used to store instructions and / or data, wherein the instructions may be computer programs.

[0279] Exemplarily, the memory 1703 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0280] It should be noted that the memory 1703 can exist independently of the processor 1701 or can be integrated with the processor 1701. The memory 1703 can be located within the communication device 1700 or outside the communication device 1700, without limitation. The processor 1701 can be used to execute instructions stored in the memory 1703 to implement the methods provided in the following embodiments of the present application.

[0281] As an optional implementation, the communication device 1700 may further include an output device 1705 and an input device 1706. The output device 1705 communicates with the processor 1701 and can display information in a variety of ways. For example, the output device 1705 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 1706 communicates with the processor 1701 and can receive user input in a variety of ways. For example, the input device 1706 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0282] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 150 may take the form of a communication device 1700 shown in FIG. 17 .

[0283] As an example, the functions / implementation process of the processing module 1501 in FIG15 can be implemented by the processor 1701 in the communication device 1700 shown in FIG17 calling the computer-executable instructions stored in the memory 1703. The functions / implementation process of the transceiver module 1502 in FIG15 can be implemented by the communication interface 1704 in the communication device 1700 shown in FIG17.

[0284] It should be noted that the structure shown in FIG17 does not constitute a specific limitation on the transmitting device and the receiving device. For example, in other embodiments of the present application, the transmitting device or the receiving device may include more or fewer components than shown in the figure, or some components may be combined or separated, or the components may be arranged differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0285] In some embodiments, an embodiment of the present application further provides a communication device, which includes a processor for implementing the method in any of the above method embodiments.

[0286] As a possible implementation, the communication device further includes a memory. The memory is used to store necessary computer programs and data. The computer program may include instructions, and the processor may invoke the instructions in the computer program stored in the memory to instruct the communication device to execute any of the above-described method embodiments. Of course, the memory may not be located in the communication device.

[0287] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, and the interface circuit is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.

[0288] As another possible implementation, the communication device further includes a communication interface, where the communication interface is used to communicate with a module outside the communication device.

[0289] It can be understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or include chips and other discrete devices. The embodiments of the present application do not specifically limit this.

[0290] The present application also provides a computer-readable storage medium having a computer program or instruction stored thereon, which implements the functions of any of the above method embodiments when executed by a computer.

[0291] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0292] Those skilled in the art will appreciate that, for the sake of convenience and brevity of description, the specific working processes of the above-described systems, devices, and units may refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0293] It is understood that the systems, devices, and methods described in this application may also be implemented in other ways. For example, the device embodiments described above are merely illustrative. 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 integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of devices or units, and may be electrical, mechanical, or other forms.

[0294] The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Components shown as units may or may not be physical units. Some or all of these units may be selected to achieve the objectives of this embodiment as needed.

[0295] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0296] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). In the embodiment of the present application, the computer may include the aforementioned device.

[0297] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and implement other changes to the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0298] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A method for sending information, characterized in that: The method comprises: Determine a first symbol, wherein a length of a first symbol component in the first symbol is related to at least one of a symbol type of the first symbol, a size of a payload of the first symbol sequence, a modulation coding scheme MCS of the first symbol, and an error vector magnitude EVM of the first symbol, an end position of the first symbol component is the same as an end position of the first symbol, and the first symbol is any symbol in the first symbol sequence; The first symbol sequence is transmitted.

2. The method according to claim 1, characterized in that The length of the first symbol component is less than or equal to a maximum delay spread MDS corresponding to the first symbol sequence.

3. The method according to claim 1 or 2, characterized in that: The length of the first symbol component is positively correlated with the size of the payload of the first symbol sequence; The length of the first symbol component is positively correlated with the size of the MCS of the first symbol; The length of the first symbol component is negatively correlated with the size of the EVM of the first symbol.

4. The method according to any one of claims 1 to 3, characterized in that: In the first symbol sequence, the first symbol components in two adjacent symbols are the same.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: A first unique word UW is obtained, wherein the first symbol includes the first UW, and a starting position of the first UW is the same as a starting position of the first symbol.

6. The method according to claim 5, characterized in that The length of the first UW is related to at least one of a transmission bandwidth of the first symbol sequence, a symbol type of the first symbol, a size of a payload of the first symbol sequence, an MCS of the first symbol, and an EVM of the first symbol.

7. The method according to claim 6, characterized in that The first symbol is the first symbol of the first symbol sequence, and the length of the first UW is related to the MDS corresponding to the first symbol sequence.

8. The method according to claim 7, characterized in that The length of the first UW is related to the MDS corresponding to a symbol preceding the first symbol.

9. The method according to claim 5, characterized in that The acquisition of the first UW includes: First indication information is received, where the first indication information indicates the first UW.

10. The method according to any one of claims 1 to 9, characterized in that: The method further comprises: A second UW is acquired, wherein the first symbol includes the second UW, and the second UW includes the first symbol component.

11. The method according to claim 10, characterized in that The length of the second UW is related to the length of the first symbol component and the length of a first UW, the first symbol includes the first UW, and a starting position of the first UW is the same as a starting position of the first symbol.

12. The method according to claim 10, characterized in that The acquisition of the second UW comprises: Second indication information is received, where the second indication information indicates the second UW.

13. The method according to claim 11 or 12, characterized in that: The first symbol is the last symbol of the first symbol sequence, the second UW includes a zero signal, and an end position of the zero signal is the same as an end position of the second UW.

14. The method according to claim 13, characterized in that The length of the zero signal is related to at least one of the MDS corresponding to the first symbol sequence, the length of the cyclic prefix CP of the next symbol of the first symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol.

15. A method for receiving information, characterized in that: The method comprises: A first symbol sequence is received, wherein the length of a first symbol component in a first symbol of the first symbol sequence is less than or equal to a maximum delay spread MDS corresponding to the first symbol sequence, the length of the first symbol component is related to at least one of a symbol type of the first symbol, a size of a payload of the first symbol sequence, a modulation and coding scheme MCS of the first symbol, and an error vector magnitude EVM of the first symbol, an end position of the first symbol component is the same as an end position of the first symbol, and the first symbol is any symbol in the first symbol sequence.

16. The method according to claim 15, characterized in that The length of the first symbol component is less than or equal to a maximum delay spread MDS corresponding to the first symbol sequence.

17. The method according to claim 15 or 16, characterized in that The length of the first symbol component is positively correlated with the size of the payload of the first symbol sequence; The length of the first symbol component is positively correlated with the size of the MCS of the first symbol; The length of the first symbol component is negatively correlated with the size of the EVM of the first symbol.

18. The method according to any one of claims 15 to 17, characterized in that: In the first symbol sequence, the first symbol components in two adjacent symbols are the same.

19. The method according to any one of claims 15 to 18, characterized in that: The method further comprises: First indication information is sent, where the first indication information indicates a first unique word UW, the first symbol includes the first UW, and a starting position of the first UW is the same as a starting position of the first symbol.

20. The method according to claim 19, characterized in that The length of the first UW is related to at least one of a transmission bandwidth of the first symbol sequence, a symbol type of the first symbol, a size of a payload of the first symbol sequence, an MCS of the first symbol, and an EVM of the first symbol.

21. The method according to claim 20, characterized in that The first symbol is the first symbol of the first symbol sequence, and the length of the first UW is related to the MDS corresponding to the first symbol sequence.

22. The method according to claim 21, characterized in that The length of the first UW is related to the MDS corresponding to a symbol preceding the first symbol.

23. The method according to any one of claims 15 to 22, characterized in that: The method further comprises: Second indication information is sent, where the second indication information indicates a second UW, the first symbol includes the second UW, and the second UW includes the first symbol component.

24. The method according to claim 23, characterized in that The length of the second UW is related to the length of the first symbol component and the length of a first UW, the first symbol includes the first UW, and a starting position of the first UW is the same as a starting position of the first symbol.

25. The method according to claim 23 or 24, characterized in that The first symbol is the last symbol of the first symbol sequence, the second UW includes a zero signal, and an end position of the zero signal is the same as an end position of the second UW.

26. The method according to claim 25, characterized in that The length of the zero signal is related to at least one of the MDS corresponding to the first symbol sequence, the length of the cyclic prefix CP of the next symbol of the first symbol, the symbol type of the next symbol, the MCS of the next symbol, and the EVM of the next symbol.

27. A communication device, characterized in that: The communication device includes a transceiver module and a processing module. The transceiver module is used to perform the receiving behavior or the sending behavior in the method according to any one of claims 1 to 14, or to perform the receiving behavior or the sending behavior in the method according to any one of claims 15 to 26; The processing module is used to execute the processing behavior in the method according to any one of claims 1-14, or to execute the processing behavior in the method according to any one of claims 15-26.

28. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the method according to any one of claims 1 to 14 is executed, or the method according to any one of claims 15 to 26 is executed.

29. A computer program product, characterized in that When the computer program product is executed on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 14, or the communication device is caused to execute the method according to any one of claims 15 to 26.

30. A chip, characterized in that: include: A processor, wherein the processor is coupled to a memory, wherein the memory is used to store programs or instructions, and when the programs or instructions are executed by the processor, the chip executes the method as described in any one of claims 1-14, or the chip executes the method as described in any one of claims 15-26.

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