Signal transmission method, and device and storage medium

Abstract

Provided in the present application are a signal transmission method, and a device and a storage medium. The signal transmission method is applied to a first communication device, and comprises: on the basis of transmission configuration information, determining a minimum resource scheduling time unit; and on the basis of the minimum resource scheduling time unit, performing signal transmission.

Description

Signal transmission method and device, and storage medium TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, for example, to a signal transmission method, device and storage medium. BACKGROUND

[0002] In ambient Internet of Thing (A-IoT) communication, a reader-to-device (R2D) link transmits a downlink signal using an On-Off Keying (OOK) modulation waveform based on Orthogonal Frequency Division Multiplexing (OFDM) technology, and a device-to-reader (D2R) link transmits an uplink signal using a single carrier (including a single tone or multiple single tones). FIG. 1 is a structural block diagram of a first network element in the related art. As shown in FIG. 1, for the R2D link, one OFDM symbol duration (excluding CP) includes one or more OOK symbols, and the transmission time length determined according to transmission parameters such as a Transport Block Size (TBS), an additional Cyclic Redundancy Check (CRC) length and a code rate is not necessarily an integer multiple of the number of OFDM symbols. For the D2R link, each modulation symbol corresponds to a chip length, and the chip length and the OFDM symbol length are not necessarily equal.

[0003] In A-IoT communication, the time period for transmitting one information bit is 1 chip, which can be shorter than the OFDM symbol duration. In order to meet more fine time domain resource scheduling (i.e., to ensure resource scheduling flexibility and system efficiency), support multiple rate transmission requirements, and facilitate interference management and coordination, how to perform multiple time domain resource allocation minimum units is a problem to be solved. SUMMARY

[0004] Therefore, embodiments of the present application provide a signal transmission method, device and storage medium, which realize allocation of a minimum resource scheduling time unit.

[0005] Embodiments of the present application provide a signal transmission method applied to a first communication device, including: determining a minimum resource scheduling time unit according to transmission configuration information; and performing signal transmission according to the minimum resource scheduling time unit.

[0006] The embodiment of the present application provides a signal transmission method, applied to a second communication device, comprising: receiving control signaling sent by a first communication device; determining a minimum resource scheduling time unit according to the control signaling.

[0007] The embodiment of the present application provides a communication device, comprising: a memory and one or more processors; the memory is configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the method in any of the above embodiments.

[0008] The embodiment of the present application provides a storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method in any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a structural block diagram of a first network element in the related art;

[0010] Fig. 2 is a topological structure diagram of passive Internet of Things in 5G in the related art;

[0011] Fig. 3 is a signal generation flowchart in the related art;

[0012] Fig. 4 is a flowchart of a signal transmission method provided by the embodiment of the present application;

[0013] Fig. 5 is a flowchart of another signal transmission method provided by the embodiment of the present application;

[0014] Fig. 6 is a schematic diagram of the relationship between a cyclic prefix, an OFDM symbol and an OOK modulation symbol provided by the embodiment of the present application;

[0015] Fig. 7 is a schematic diagram of the alignment between the chip / modulation symbol duration and 0.5ms or 7*n OFDM symbols containing a cyclic prefix provided by the embodiment of the present application;

[0016] Fig. 8 is a schematic diagram of a multi-single waveform provided by the embodiment of the present application;

[0017] Fig. 9 is a schematic diagram of the fine-tuned chip length provided by the embodiment of the present application;

[0018] Fig. 10 is a schematic diagram of a time transmission mode provided by the embodiment of the present application;

[0019] Fig. 11 is a schematic diagram of another time transmission mode provided by the embodiment of the present application;

[0020] Fig. 12 is a schematic diagram of another time transmission mode provided by the embodiment of the present application;

[0021] Fig. 13 is a schematic diagram of a time transmission GAP scheme provided by the embodiment of the present application;

[0022] FIG. 14 is a schematic diagram of another time transmission GAP scheme provided by the embodiment;

[0023] FIG. 15 is a schematic diagram of a configuration based on the chip start position of data transmission in a CP-removed OFDM symbol provided by the embodiment;

[0024] FIG. 16 is a schematic diagram of a transmission scheme provided by the embodiment;

[0025] FIG. 17 is a schematic diagram of the effect of a transmission scheme provided by the embodiment;

[0026] FIG. 18 is a schematic diagram of a scheme based on the combination of a transmission scheme and a chip length definition scheme provided by the embodiment;

[0027] FIG. 19 is a structural block diagram of a signal transmission apparatus provided by the embodiment of the application;

[0028] FIG. 20 is a structural block diagram of another signal transmission apparatus provided by the embodiment of the application;

[0029] FIG. 21 is a structural schematic diagram of a communication device provided by the embodiment of the application. DETAILED DESCRIPTION

[0030] Hereinafter, the embodiments of the application will be described with reference to the accompanying drawings. The application is described below in conjunction with the accompanying drawings of the embodiments, and the examples are used to explain the application, but are not used to limit the scope of the application.

[0031] FIG. 2 is a topological structure diagram of passive Internet of Things in 5G in the related art. Among them, the base station (Base Station, BS) is a wireless communication node for sending and receiving information. Among them, the intermediate node / assisting node is an intermediate node / assisting node, which is a wireless communication node responsible for sending and / or receiving information of an ambient Internet of Things (Ambient IoT) device, such as a terminal, a reader, an excitation source or a Bluetooth. Among them, the device that sends a power signal for the Ambient IoT device can be a BS, an intermediate node / assisting node or an independent wireless communication node. In a mobile communication network, the base station configures the number of OFDM symbols and the number of resource blocks in the frequency domain required for the user terminal device to transmit downlink according to the downlink service scheduling. Taking 15 kHz subcarrier spacing (SCS) as an example, the corresponding order μ = 0, the time length of one downlink time slot is 2^μ = 1 ms, and one time slot includes 14 OFDM symbols, and the time length of each OFDM symbol is 66.67us. The OFDM symbol parameters under other SCS configurations are shown in Table 1.

[0032] Table 1 Scalable OFDM Parameter Set for 5G NR

[0033] Taking the first communication device as the transmitting node (base station / auxiliary node / intermediate node / reader) and the second communication device as the receiving node (passive IoT device / terminal device / tag) as an example.

[0034] Figure 3 is a flowchart of signal generation in related technologies. As shown in Figure 3, the encoding methods include linear codes and / or forward error correction (FEC) codes. The modulation methods include OOK and / or binary phase shift keying (BPSK) and / or frequency shift keying (FSK) and / or square wave modulation and / or subcarrier modulation, etc. For R2D links, linear codes include at least one of Manchester codes, Pulse Interval Encoding (PIE) codes, and non-return-to-zero codes, etc., and FEC codes include predefined polar code codes, convolutional codes, etc. For D2R links, linear codes include at least one of Manchester codes, PIE codes, non-return-to-zero codes, Miller codes, and bi-phase space (FM0) codes, etc., and FEC codes include tail-biting convolutional codes. As shown in Figure 3, the OFDM-based OOK waveform generation process includes the following operations:

[0035] The Transport Block Size (TBS) is appended with a CRC to obtain TBS+L. CRC Long bit sequence 1.

[0036] Encoding the information bit sequence 1 yields the E-length encoded bit sequence 2, where...

[0037] Divide the encoded bit sequence 2 into blocks of M bits each, resulting in X M-length bit sequences 3, where

[0038] Each bit in the M-length bit sequence 3 is extended / copied to a length of L, resulting in an N′-length bit sequence 4, where Alternatively, extend / copy bit-by-bit the M-long bit sequence 3 into L. i The length is N′, resulting in a bit sequence of length 4, where Where i is an integer in the interval from 0 to M-1. Where L i or or This represents the number of samples or duration corresponding to the chip / modulation symbol.

[0039] Perform a Discrete Fourier Transform (DFT) operation on the N′-long bit sequence 4 to obtain the N′-long frequency domain sequence 5.

[0040] The N′ long frequency domain sequence 5 is subjected to spectral shifting or cyclic shifting with N′ / 2-1, N′ / 2, or N′ / 2+1 as intermediate points to obtain the N′ long frequency domain sequence 6.

[0041] Take the N′ long frequency domain sequence 6, the middle N RE Long sequences, mapped to frequency domain resources, i.e., N RE Each subcarrier position is padded with zeros on both sides (NN) RE () / 2 zeros), to obtain N long frequency domain signal 7.

[0042] Perform an N-point IFFT operation on the N-length frequency domain signal 7 to obtain an N-length time domain signal.

[0043] Power control is applied to an N-length signal based on the power offset.

[0044] The head or tail of an N-length time-domain signal cp The long information is cyclically shifted and placed at the beginning of the N-length time-domain signal to obtain N. cp +N long-time domain signals; where N cp This represents the number of cyclic prefixes.

[0045] X N cp +N long time-domain signals are cascaded to obtain the final continuous time-domain signal.

[0046] In one embodiment, the single-tone waveform generation process includes the following operations:

[0047] By appending a CRC to the transport block size (TBS), we obtain TBS+L. CRC Long bit sequence 1; Encode bit sequence 1 to obtain E-length encoded bit sequence 2, where The encoded bit sequence 2 is extended / copied bit by bit to form a bit sequence 3 of length N, where Either 1 or 2, where f s Where f is the sampling frequency and f is the transmission bandwidth of the single-tone signal; power control is performed on the N-length signal according to the power offset; E N-length signals are cascaded to obtain the final time-domain continuous signal.

[0048] For 5G New Radio (NR) systems, T c= 1 / (Δf max · N f s c , T s = 1 / (Δf ref · N f,ref ). Wherein, Δf max = 480kHz, N f = 4096, Δf ref = 15kHz, N f,ref = 2048; Wherein, T s is the sampling time; N f is the number of subcarriers; Δf ref is the minimum subcarrier spacing configuration that A-IoT downlink can support; f max is the maximum subcarrier spacing configuration that A-IoT downlink can support; N f,ref is the number of samples contained in a time slot.

[0049] According to the formula of T c and T s , the time of each sampling point is T = 1 / (Δf*N f’ ), then T*Δf*N f’ = 1ms. Taking subcarrier spacing (SCS) Δf = 15kHz as an example, the number of sampling points corresponding to 1ms is 2048*15, therefore, 1 slot corresponds to 14 OFDM symbols and the total number of sampling points is 14 CPs of 2048, and each CP can be divided by 16.

[0050] For R2D transmission, Tc, Ts are determined by SCS and N f , if N f is constant, the values of Tc, Ts can be consistent with 5G NR. Then consider the influence of M value, encoding code word and transmission boundary on the minimum resource allocation time unit.

[0051] For D2R transmission, the minimum time granularity Tc needs to be determined according to the transmission bandwidth of the device and the number of sampling points Nchip per chip / modulation symbol, Nchip and clock period, frequency division ratio, sampling rate, etc. It is recommended to define the minimum time granularity according to the minimum chip / modulation symbol length (i.e. 1 / maxBWtx). One OFDM symbol has M chips / modulation symbols, and the length of one amplitude modulation symbol is chip / modulation symbol. Transmission is M integer times.

[0052] ​​In an embodiment, FIG. 4 is a flowchart of a signal transmission method provided by the embodiments of the present application. The embodiment is applied to the case where the first communication device transmits signals by using the minimum resource scheduling time unit. The embodiment can be executed by the first communication device. As shown in FIG. 4, the embodiment includes S110-S120.

[0053] S110, determining the minimum resource scheduling time unit according to the transmission configuration information.

[0054] The transmission configuration information is OFDM symbol related parameters. For example, the transmission configuration information can include subcarrier spacing (SCS), OFDM symbol duration, the number of sampling points corresponding to one OFDM symbol, and the number of chips / modulation symbols in one OFDM symbol. For one OFDM symbol, it includes one or more sampling points. The minimum resource scheduling time unit refers to the time unit used for resource allocation and scheduling in A-IoT communication. In an example, the minimum resource scheduling time unit can include the duration of a chip / modulation symbol, the duration of an OFDM symbol, the duration of an OFDM symbol, the duration of a slot, and the duration of a subframe. In an embodiment, the minimum resource scheduling time unit can be configured according to the transmission configuration information.

[0055] S120, transmitting signals according to the minimum resource scheduling time unit.

[0056] In an embodiment, the signal transmission includes uplink transmission and downlink transmission. The first communication device can be a terminal device or a reader. When the first communication device is a reader, the second communication device is a terminal device; when the first communication device is a terminal device, the second communication device is a reader. When the first communication device is a reader, the downlink transmission can be performed by using the minimum resource scheduling time unit; when the first communication device is a terminal device, the uplink or downlink transmission can be performed by using the minimum resource scheduling time unit.

[0057] In an embodiment, the transmission configuration information includes at least one of subcarrier spacing SCS, the duration of one OFDM symbol, the number of sampling points corresponding to one OFDM symbol, and the number of chips / modulation symbols M in one OFDM symbol.

[0058] The subcarrier spacing SCS is the frequency difference between adjacent subcarriers. In an example, the subcarrier spacing SCS can be 15 kHz, 30 kHz, 60 kHz, or 120 kHz, etc. The OFDM symbol duration refers to the length of time that an OFDM symbol lasts. When the subcarrier spacing SCS is small, the OFDM symbol duration is relatively long. The OFDM symbol is the basic unit for data transmission in OFDM. The number of samples refers to the number of sampling points corresponding to an OFDM symbol. The number of chips / modulation symbols refers to the number of chips or the number of modulation symbols, where the modulation symbols can include at least OOK, BPSK, or FSK modulation symbols. In an example, the subcarrier spacing SCS, the OFDM symbol duration, the number of samples corresponding to an OFDM symbol, and the number of chips / modulation symbols in an OFDM symbol M can be determined as the transmission configuration information.

[0059] In an embodiment, the minimum resource scheduling time unit includes at least one of the following: a chip / modulation symbol duration, an OFDM symbol duration, o OFDM symbol durations, a slot duration, a subframe duration, where o is an integer in the interval of 1 to 14.

[0060] The chip / modulation symbol duration is the length of time that a chip or a modulation symbol, which maps digital information to a signal space through a specific modulation method, lasts. The OFDM symbol duration refers to the length of time that an OFDM symbol lasts. Generally, the OFDM symbol duration can be composed of a useful symbol time and a cyclic prefix time, and the number of OFDM symbol durations can be an integer in the interval of 1 to 14. The slot duration is the length of time that each slot lasts after the time axis is divided into segments. The subframe duration is the length of time that each subframe lasts after the time axis is divided into segments. The minimum resource scheduling time unit can be determined according to at least one of the subcarrier spacing SCS, the OFDM symbol duration, the number of samples corresponding to an OFDM symbol, and the number of chips / modulation symbols in an OFDM symbol M.

[0061] In an embodiment, the minimum resource scheduling time unit is related to the chip / modulation symbol duration of the uplink transmission, or the minimum resource scheduling time unit is a positive multiple of the chip / modulation symbol duration of the uplink transmission, where the duration of each chip / modulation symbol is fixed and equal in the downlink transmission.

[0062] In an example, the minimum resource scheduling time unit is related to the chip / modulation symbol duration of the uplink transmission, and the chip / modulation symbol duration of the uplink transmission and the chip / modulation symbol duration of the downlink transmission are T chip For example, when the chip / modulation symbol duration of the uplink transmission is the same, the minimum resource scheduling time unit can be m*Tchip wherein m can be an integer greater than 0; when the chip / modulation symbol duration of the uplink transmission is not the same, the minimum resource scheduling time unit can be the sum of m chip / modulation symbol durations of the uplink transmission. Meanwhile, in the downlink transmission process, the duration of each chip / modulation symbol is fixed and equal, that is, in the downlink transmission process, the minimum resource scheduling time unit is m*T chip .

[0063] In an embodiment, the minimum resource scheduling time unit of the downlink transmission is determined according to the number M of chips / modulation symbols contained in one OFDM symbol.

[0064] In an example, the number of chips / modulation symbols contained in one OFDM symbol is associated with the minimum resource scheduling time unit. Since in the downlink transmission process, the duration of each chip / modulation symbol is fixed and equal, the chip / modulation symbol duration of the downlink transmission can be determined by the number M of chips / modulation symbols contained in one OFDM symbol, and then the minimum resource scheduling time unit of the downlink transmission is determined according to the chip / modulation symbol duration of the downlink transmission.

[0065] In an embodiment, one OFDM symbol or one downlink transmission includes: a first chip / modulation symbol and a second chip / modulation symbol; or,

[0066] One OFDM symbol or one downlink transmission includes: a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol.

[0067] In an example, the chip / modulation symbol of one OFDM symbol or one downlink transmission can be multiple, for example, can include a first chip / modulation symbol and a second chip / modulation symbol; or can include a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol. In an embodiment, when the number M of chips / modulation symbols in the downlink transmission configuration is greater than 24, the number of cyclic prefixes is greater than n times the number of chips / modulation symbols, or the duration of the cyclic prefix is greater than n times the duration of the chip / modulation symbol, one OFDM symbol or one downlink transmission includes a third chip / modulation symbol.

[0068] In an embodiment, one OFDM symbol contains a first chip / modulation symbol and a second chip / modulation symbol; the number relationship between the first chip / modulation symbol and the second chip / modulation symbol includes: the number of the first chip / modulation symbol is M-1, and the number of the second chip / modulation symbol is 1; or the number of the first chip / modulation symbol is M-n, and the number of the second chip / modulation symbol is n, wherein n is determined according to at least one of the value of M, the duration of one OFDM symbol, or the number of samples corresponding to one OFDM symbol.

[0069] In an example, one OFDM symbol contains a first chip / modulation symbol and a second chip / modulation symbol, the number of chip / modulation symbols in one OFDM symbol is M, when the number of first chip / modulation symbols is M-1, the number of second chip / modulation symbols is 1; correspondingly, when the number of first chip / modulation symbols is M-n, the number of second chip / modulation symbols is n, that is, the total number of first chip / modulation symbols and second chip / modulation symbols is M. In an example, the value of n can be determined by the value of M, the duration of one OFDM symbol or the number of samples corresponding to one OFDM symbol, respectively.

[0070] In an embodiment, one OFDM symbol contains a first chip / modulation symbol and a second chip / modulation symbol; the determination of the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol includes at least one of the following: determining the number of samples corresponding to the first chip / modulation symbol according to the down-round value of the ratio of the number of samples corresponding to one OFDM symbol / sampling rate / link rate to the number of chip / modulation symbols contained in one OFDM symbol, and determining the number of samples corresponding to the second chip / modulation symbol according to the up-round value of the ratio of the number of samples corresponding to one OFDM symbol / sampling rate / link rate to the number of chip / modulation symbols contained in one OFDM symbol; or, determining the number of samples corresponding to the first chip / modulation symbol according to the down-round value of the number of chip / modulation symbols contained in one OFDM symbol / sampling rate / link rate, and determining the number of samples corresponding to the second chip / modulation symbol according to the remaining number of samples; or, determining the number of samples corresponding to the first chip / modulation symbol according to the down-round value of the number of chip / modulation symbols contained in one OFDM symbol / sampling rate / link rate and an offset value, and determining the number of samples corresponding to the second chip / modulation symbol according to the remaining number of samples; or, determining the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol according to the number of chip / modulation symbols contained in one OFDM symbol; the determination of the duration of the first chip / modulation symbol and the duration of the second chip / modulation symbol includes at least one of the following: determining the duration of the first chip / modulation symbol according to the duration of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the first chip / modulation symbol, and determining the duration of the second chip / modulation symbol according to the duration of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the second chip / modulation symbol; or, the duration of the second chip / modulation symbol is the sum of the duration of the first chip / modulation symbol and the duration of the cyclic prefix (CP).

[0071] In an example, a ratio of a number of samples / sampling rate / link rate corresponding to one OFDM symbol and a number of chips / modulation symbols contained in one OFDM symbol can be determined, a first chip / modulation symbol corresponding to a number of samples obtained by rounding down the ratio, and a second chip / modulation symbol corresponding to a number of samples obtained by rounding down the ratio. Alternatively, a first chip / modulation symbol corresponding to a number of samples obtained by rounding down a ratio of a number of samples / sampling rate / link rate corresponding to one OFDM symbol and a number of chips / modulation symbols contained in one OFDM symbol, and a second chip / modulation symbol corresponding to a number of samples obtained by subtracting the number of samples corresponding to the first chip / modulation symbol from the number of samples corresponding to one OFDM symbol. If there is an offset value, a first chip / modulation symbol corresponding to a number of samples obtained by rounding down a ratio of a number of samples / sampling rate / link rate corresponding to one OFDM symbol and a number of chips / modulation symbols contained in one OFDM symbol, and then removing the offset value, and a second chip / modulation symbol corresponding to a number of samples obtained by subtracting the number of samples corresponding to the first chip / modulation symbol from the number of samples corresponding to one OFDM symbol. Alternatively, a first chip / modulation symbol corresponding to a number of samples obtained by a number of chips / modulation symbols contained in one OFDM symbol, and a second chip / modulation symbol corresponding to a number of samples obtained by a number of chips / modulation symbols contained in one OFDM symbol. In some embodiments, rounding down can be replaced by rounding up, or rounding, or keeping the original value, or at least one of them.

[0072] A first chip / modulation symbol duration can be determined by a duration of one OFDM symbol / sampling rate / link rate and a number of samples corresponding to the first chip / modulation symbol, and a second chip / modulation symbol duration can be determined by a duration of one OFDM symbol / sampling rate / link rate and a number of samples corresponding to the second chip / modulation symbol. Alternatively, after determining the first chip / modulation symbol duration, the second chip / modulation symbol duration is the sum of the first chip / modulation symbol duration and a cyclic prefix (CP) duration.

[0073] In an embodiment, one OFDM symbol contains a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol. The duration relationship of the first chip / modulation symbol, the second chip / modulation symbol, and the third chip / modulation symbol includes at least one of the following: the third chip / modulation symbol duration is the sum of the first chip / modulation symbol duration and a cyclic prefix (CP) duration, or the third chip / modulation symbol duration is the sum of the second chip / modulation symbol duration and the CP duration.

[0074] One OFDM symbol can contain a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol. If the first chip / modulation symbol duration is a cyclic prefix (CP) duration is T cp , the second chip / modulation symbol duration is the third chip / modulation symbol duration is or at least one of the following.

[0075] In an embodiment, one OFDM symbol comprises a fourth chip / modulation symbol; the fourth chip / modulation symbol duration comprises one of the following: twice the first chip / modulation symbol duration, the sum of the first chip / modulation symbol duration and half of the CP duration, twice the second chip / modulation symbol duration, the sum of the second chip / modulation symbol duration and half of the CP duration, the sum of the first chip / modulation symbol duration and the second chip / modulation symbol duration, the sum of the first chip / modulation symbol duration and the CP duration, and the difference between the second chip / modulation symbol duration, the sum of the second chip / modulation symbol duration and the CP duration, and the difference between the first chip / modulation symbol duration, the CP duration; the fourth chip / modulation symbol duration corresponds to one of the following: twice the number of samples corresponding to the first chip / modulation symbol duration, the sum of the number of samples corresponding to the first chip / modulation symbol duration and half of the number of samples corresponding to the CP duration, twice the number of samples corresponding to the second chip / modulation symbol duration, the sum of the number of samples corresponding to the second chip / modulation symbol duration and half of the number of samples corresponding to the CP duration, the sum of the number of samples corresponding to the first chip / modulation symbol duration and the number of samples corresponding to the second chip / modulation symbol duration, the sum of the number of samples corresponding to the first chip / modulation symbol duration and the number of samples corresponding to the CP duration, and the difference between the number of samples corresponding to the second chip / modulation symbol duration, the sum of the number of samples corresponding to the second chip / modulation symbol duration and the number of samples corresponding to the CP duration, and the difference between the number of samples corresponding to the first chip / modulation symbol duration, the number of samples corresponding to the CP duration.

[0076] In an example, when the fourth chip / modulation symbol duration is twice the first chip / modulation symbol duration, the sample number corresponding to the fourth chip / modulation symbol duration includes twice the sample number corresponding to the first chip / modulation symbol duration; when the fourth chip / modulation symbol duration is the sum of the first chip / modulation symbol duration and half of the CP duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the sum of the sample number corresponding to the first chip / modulation symbol duration and half of the sample number corresponding to the CP duration; when the fourth chip / modulation symbol duration is twice the second chip / modulation symbol duration, the sample number corresponding to the fourth chip / modulation symbol duration includes twice the sample number corresponding to the second chip / modulation symbol duration; when the fourth chip / modulation symbol duration is the sum of the second chip / modulation symbol duration and half of the CP duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the sum of the sample number corresponding to the second chip / modulation symbol duration and half of the sample number corresponding to the CP duration; when the fourth chip / modulation symbol duration is the sum of the first chip / modulation symbol duration and the second chip / modulation symbol duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the sum of the sample number corresponding to the first chip / modulation symbol duration and the sample number corresponding to the second chip / modulation symbol duration; when the fourth chip / modulation symbol duration is the sum of the first chip / modulation symbol duration and the CP duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the sum of the sample number corresponding to the first chip / modulation symbol duration and the sample number corresponding to the CP duration; when the fourth chip / modulation symbol duration is the difference between the second chip / modulation symbol duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the difference between the sample number corresponding to the second chip / modulation symbol duration; when the fourth chip / modulation symbol duration is the sum of the difference between the second chip / modulation symbol duration and the second chip / modulation symbol duration and the CP duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the sum of the sample number corresponding to the second chip / modulation symbol duration and the sample number corresponding to the CP duration; when the fourth chip / modulation symbol duration is the difference between the second chip / modulation symbol duration and the first chip / modulation symbol duration, the sample number corresponding to the fourth chip / modulation symbol duration includes the difference between the sample number corresponding to the first chip / modulation symbol duration; when the fourth chip / modulation symbol duration is the CP duration, the sample number corresponding to the fourth chip / modulation symbol duration is the sample number corresponding to the CP duration.

[0077] In an embodiment, one OFDM symbol comprises a fifth chip / modulation symbol; the fifth chip / modulation symbol duration is determined by one of the following: the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, and the first chip / modulation symbol duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and half of the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the second chip / modulation symbol duration; the number of samples corresponding to the fifth chip / modulation symbol duration is determined by one of the following: the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, and the number of samples corresponding to the first chip / modulation symbol; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and half of the number of samples corresponding to the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the second chip / modulation symbol; wherein the quantity of other chip / modulation symbols is the difference between the quantity of chip / modulation symbols corresponding to one OFDM symbol and the number of check chips; and the duration of other chip / modulation symbols is the product of the number of check chips and the fifth chip / modulation symbol duration.

[0078] In an example, the fifth chip / modulation symbol duration can be determined by determining the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, and the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, multiplying the two absolute values, and adding the product to the first chip / modulation symbol duration. Alternatively, the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the product of the two absolute values can be determined, and the sum of the product, the first chip / modulation symbol duration, and the CP duration can be determined as the fifth chip / modulation symbol duration. Alternatively, the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the product of the two absolute values can be determined, and half of the sum of the product, the first chip / modulation symbol duration, and the CP duration can be determined as the fifth chip / modulation symbol duration. Alternatively, the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the product of the two absolute values can be determined, and the sum of the product and twice the number of samples corresponding to the first chip / modulation symbol can be determined as the fifth chip / modulation symbol duration. Alternatively, the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the product of the two absolute values can be determined, and the sum of the product and twice the number of samples corresponding to the second chip / modulation symbol can be determined as the fifth chip / modulation symbol duration. Meanwhile, the quantity of the other chip / modulation symbols is the difference between the quantity of chip / modulation symbols corresponding to one OFDM symbol and the quantity of guard chips, and the duration of the other chip / modulation symbols is the product of the quantity of guard chips and the fifth chip / modulation symbol duration.

[0079] In an embodiment, the first number of chips / modulation symbols is twice the second number of chips / modulation symbols; one OFDM symbol contains the fifth number of chips / modulation symbols; the number of samples corresponding to the duration of the fifth number of chips / modulation symbols comprises one of: the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the first number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the second number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and half of the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and half of the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and the number of samples corresponding to the first number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the second number of chips / modulation symbols determined; wherein the number of other chips / modulation symbols is at least one of the first number of chips / modulation symbols, the second number of chips / modulation symbols, the fifth number of chips / modulation symbols, or the difference between the number of samples corresponding to one OFDM symbol and the number of parity chips; and the duration of the other chips / modulation symbols is at least one of the duration of the first number of chips / modulation symbols, the duration of the second number of chips / modulation symbols, the duration of the fifth number of chips / modulation symbols, or the product of the number of parity chips and the duration of the fifth number of chips / modulation symbols.

[0080] In an example, when the first chip / modulation symbol quantity is twice the second chip / modulation symbol quantity, a ratio of the sample quantity corresponding to one OFDM symbol to 6 can be determined, an absolute value of a difference between the sample quantity corresponding to the first chip / modulation symbol and the sample quantity corresponding to the second chip / modulation symbol can be determined, a product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the sample quantity corresponding to the first chip / modulation symbol is taken as the sample quantity corresponding to the fifth chip / modulation symbol duration. Alternatively, the ratio of the sample quantity corresponding to one OFDM symbol to 6 can be determined, the absolute value of the difference between the sample quantity corresponding to the first chip / modulation symbol and the sample quantity corresponding to the second chip / modulation symbol can be determined, the product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the sample quantity corresponding to the second chip / modulation symbol is taken as the sample quantity corresponding to the fifth chip / modulation symbol duration. Alternatively, the ratio of the sample quantity corresponding to one OFDM symbol to 6 can be determined, the absolute value of the difference between the sample quantity corresponding to the first chip / modulation symbol and the sample quantity corresponding to the second chip / modulation symbol can be determined, the product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the sample quantity corresponding to the first chip / modulation symbol and the CP quantity is taken as the sample quantity corresponding to the fifth chip / modulation symbol duration. Alternatively, the ratio of the sample quantity corresponding to one OFDM symbol to 6 can be determined, the absolute value of the difference between the sample quantity corresponding to the first chip / modulation symbol and the sample quantity corresponding to the second chip / modulation symbol can be determined, the product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the sample quantity corresponding to the second chip / modulation symbol and the CP quantity is taken as the sample quantity corresponding to the fifth chip / modulation symbol duration.

[0081] Alternatively, a ratio of the number of samples corresponding to one OFDM symbol to 6 can be determined, an absolute value of a difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol can be determined, a product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the number of samples corresponding to the first chip / modulation symbol and half of the number of CPs can be taken as the number of samples corresponding to the fifth chip / modulation symbol. Alternatively, a ratio of the number of samples corresponding to one OFDM symbol to 6 can be determined, an absolute value of a difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol can be determined, a product of the ratio and the absolute value of the difference can be determined, and a sum of the product and the number of samples corresponding to the second chip / modulation symbol and half of the number of CPs can be taken as the number of samples corresponding to the fifth chip / modulation symbol. Alternatively, a ratio of the number of samples corresponding to one OFDM symbol to 6 can be determined, an absolute value of a difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol can be determined, a product of the ratio and the absolute value of the difference can be determined, and the product and twice the number of samples corresponding to the first chip / modulation symbol can be taken as the number of samples corresponding to the fifth chip / modulation symbol. Alternatively, a ratio of the number of samples corresponding to one OFDM symbol to 6 can be determined, an absolute value of a difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol can be determined, a product of the ratio and the absolute value of the difference can be determined, and the product and twice the number of samples corresponding to the second chip / modulation symbol can be taken as the number of samples corresponding to the fifth chip / modulation symbol.

[0082] In an embodiment, the minimum resource scheduling time unit is aligned with one OFDM symbol boundary including a cyclic prefix, including one of the following: a starting position of the first chip / modulation symbol is consistent with a starting position of one OFDM symbol including a cyclic prefix; a starting position of the first chip / modulation symbol is consistent with a starting position of an OFDM symbol excluding a cyclic prefix; an ending position of the mth chip / modulation symbol in the minimum resource scheduling time unit is aligned with an ending position of one OFDM symbol.

[0083] In an example, the minimum resource scheduling time unit can be aligned with one OFDM symbol boundary including a cyclic prefix in various ways. For example, a starting position of the first chip / modulation symbol can be consistent with a starting position of one OFDM symbol including a cyclic prefix; or a starting position of the first chip / modulation symbol can be consistent with a starting position of an OFDM symbol excluding a cyclic prefix; or an ending position of the mth chip / modulation symbol in the minimum resource scheduling time unit can be aligned with an ending position of one OFDM symbol.

[0084] In an embodiment, each n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 0.5ms or 7*n OFDM symbols with cyclic prefix; wherein n is an integer greater than or equal to 1; C is the number of chips corresponding to one OFDM symbol minus one or plus one.

[0085] In an example, in the case that each n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 0.5ms or 7*n OFDM symbols with cyclic prefix, the chip / modulation symbol duration is in the range of (0.5ms-1 / (2Δf ref ) / (n·(C+1)) to 0.5ms / (n·C); wherein Δf ref is the minimum subcarrier spacing supportable by A-IoT downlink; or, the chip / modulation symbol duration is 0.5ms / (n·C), or 0.5ms / (n·C+1), or 0.5ms / (n·(C+1)); or, the chip / modulation symbol duration includes a chip / modulation symbol duration of n*C chips / modulation symbols is 1 / (Δf ref *C) and a chip / modulation symbol duration of 1 chip / modulation symbol is 1 / (2Δf ref ); or, the chip / modulation symbol duration includes a chip / modulation symbol duration of n*C chips / modulation symbols is 1 / (Δf ref *C) and a chip / modulation symbol duration of n chips / modulation symbols is the cyclic prefix duration T cp .

[0086] In an embodiment, each n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 1ms or 14*n OFDM symbols with cyclic prefix; wherein n is an integer greater than or equal to 1; C is the number of chips corresponding to one OFDM symbol minus one or plus one.

[0087] In an example, in the case that each n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 1ms or 14*n OFDM symbols with cyclic prefix, the chip / modulation symbol duration is in the range of (1ms-1 / (2Δf ref ) / (n·(C+1)) to 1ms / (n·C); wherein Δf ref is the minimum subcarrier spacing supportable by A-IoT downlink. Or, the chip / modulation symbol duration is 1ms / (n·C), or 1ms / (n·C+1), or 1ms / (n·(C+1)); or, the chip / modulation symbol duration includes a chip / modulation symbol duration of n*C chips / modulation symbols is 1 / (Δf ref* C) and 1 chip / modulation symbol duration is 1 / (Δf ref ); or, the chip / modulation symbol duration includes n*C chip / modulation symbols and the chip / modulation symbol duration is 1 / (Δf ref *C) and n chip / modulation symbols duration is a cyclic prefix duration T cp .

[0088] In an embodiment, a timing offset is appended after every n*C or n*C+1 or n*(C+1) chip / modulation symbols to align with at least one of a cyclic prefix containing OFDM symbol, a non-cyclic prefix containing OFDM symbol, a slot boundary, a half slot boundary, or a subframe boundary.

[0089] In an example, a timing offset is appended after every n*C or n*C+1 or n*(C+1) chip / modulation symbols in a transmission to ensure alignment with at least one of a cyclic prefix containing OFDM symbol, a non-cyclic prefix containing OFDM symbol, a slot boundary, a half slot boundary, or a subframe boundary. In an example, when the chip / modulation symbol duration is The timing offset can be located before the end of 7 OFDM symbol duration; the chip / modulation symbol duration is The timing offset can be located before the end of 7 OFDM symbol duration; the chip / modulation symbol duration is The timing offset is located before the end of 14 OFDM symbol duration; or, when the chip / modulation symbol duration is The timing offset is located before the end of 15 OFDM symbol duration; or, when the chip / modulation symbol duration is The timing offset is located before the end of 2 slot duration. Wherein, N f,ref is the number of samples contained in a slot.

[0090] In an embodiment, the time transmission pattern of the signal transmission includes: a downlink timing, an uplink timing, and a guard interval; the guard interval includes: a downlink guard interval and an uplink guard interval.

[0091] The downlink timing (RD timing for short) is the time sequence arrangement when data is transmitted from a device as a sending end, such as a base station or a reader, to a device as a receiving end, such as a user terminal or an AIoT terminal device. The uplink timing (DR timing for short) is the time sequence arrangement when data is transmitted from a device as a sending end, such as a user terminal or an AIoT terminal device, to a device as a receiving end, such as a base station or a reader. The guard period (GP) refers to an interval inserted in a specific time period of a transmitted signal. The downlink guard period is a time interval set to avoid interference between uplink signals or other downlink transmissions. The uplink guard period is a time interval set to avoid interference between uplink signals or other uplink transmissions. In an example, the length of the downlink guard period is related to at least one of the downlink transmission time length, the number of chips / modulation symbols in one OFDM symbol, the subcarrier spacing, the coding rate, and the data rate. The length of the uplink guard period is related to at least one of the uplink transmission time length, the transmission frequency bandwidth, the coding rate, the backscattering link frequency, the subcarrier / square wave frequency, and the data rate.

[0092] In an embodiment, the downlink guard period is located between the downlink timing and the uplink timing, and the downlink transmission is prior to the uplink transmission. The uplink guard period is located between the uplink timing and the downlink timing, and the uplink transmission is prior to the downlink transmission.

[0093] In an example, the downlink guard period and the uplink guard period are located between the downlink timing and the uplink timing. The downlink guard period is located prior to the uplink transmission and subsequent to the downlink transmission. The uplink guard period is located prior to the downlink transmission and subsequent to the uplink transmission.

[0094] In an embodiment, the length of the downlink guard period is related to at least one of the downlink transmission time length, the number of chips / modulation symbols in one OFDM symbol, the subcarrier spacing, the coding rate, and the data rate. The length of the uplink guard period is related to at least one of the uplink transmission time length, the transmission frequency bandwidth, the coding rate, the backscattering link frequency, the subcarrier / square wave frequency, and the data rate.

[0095] In an example, the time required for a downlink transmission duration decision signal to travel from the first communication device to the second communication device, if the downlink transmission duration is longer, the length of the downlink guard interval can be set longer. The more chip / modulation symbols an OFDM symbol contains, the longer the signal takes to transmit, and the length of the downlink guard interval can be set longer. The subcarrier spacing affects the interference between subcarriers, and the larger the subcarrier spacing, the shorter the length of the downlink guard interval can be set. The coding rate determines the error correction capability of a signal during transmission, and if the coding rate is higher, the length of the downlink guard interval can be set longer. The higher the data rate, the longer the length of the downlink guard interval can be set. The time required for an uplink transmission duration decision signal to travel from the first communication device to the second communication device, if the uplink transmission duration is longer, the length of the uplink guard interval can be set longer. The transmission frequency band width affects the signal transmission rate, and when the transmission frequency band width is wider, the length of the uplink guard interval can be set longer. The coding rate determines the error correction capability of a signal during transmission, and if the coding rate is higher, the length of the uplink guard interval can be set longer. The backscatter link frequency affects the interference situation of signal propagation, and the higher the backscatter link frequency, the greater the signal transmission interference, and the length of the uplink guard interval can be adjusted according to the backscatter link frequency. The subcarrier / square wave frequency affects the modulation method and transmission efficiency of the signal, and the higher the subcarrier / square wave frequency, the shorter the length of the uplink guard interval. The data rate affects the signal transmission time, and the higher the data rate, the longer the length of the uplink guard interval can be set.

[0096] In an embodiment, for downlink transmission, if the number of chips / modulation symbols contained in an OFDM symbol is not a power of 2, a GAP time is added at every interval T; for uplink transmission, a GAP time is added after a fixed number of chips / modulation symbols.

[0097] The GAP time, i.e., the guard interval time (GAP). For downlink transmission, when the number of chips / modulation symbols contained in an OFDM symbol is not equal to a power of 2, a GAP time can be added at every interval T to ensure time alignment with the slot boundary of traditional 4G / 5G. For uplink transmission, in order to align with the OFDM symbol or subframe boundary, a GAP time can be added after a fixed number of chips / modulation symbols.

[0098] In an embodiment, if the number of chips / modulation symbols contained in an OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in an OFDM symbol contains a check chip of a second value.

[0099] The first number refers to a pre-set threshold. For example, the first number can be at least 24. The second number refers to the number of check chips. For example, the second number can be an integer greater than 0 and less than the number of chips / modulation symbols M in an OFDM symbol. The check chip is a mechanism used to detect and correct errors during signal transmission. The check chip has a fixed level value, or carries a fixed bit value, or its level value is consistent with the first chip or the last chip in the M chips, or its level value is consistent with the level of its adjacent chips.

[0100] In an embodiment, the position of the check chip of the second number includes one of the following: the end position of the number of chips / modulation symbols contained in an OFDM symbol; the start position of the number of chips / modulation symbols contained in an OFDM symbol; at least one check chip is located at the start position of the number of chips / modulation symbols contained in an OFDM symbol, and at least one check chip is located at the end position of the number of chips / modulation symbols contained in an OFDM symbol.

[0101] In an example, the position of the check code of the second number can include multiple, for example, all check codes can be located at the end position or the start position of the number of chips / modulation symbols contained in an ODFM symbol; or alternatively, part of the check codes can be located at the end position or the start position of the number of chips / modulation symbols contained in an ODFM symbol.

[0102] In an embodiment, the data transmission starts from the third number of chips / modulation symbols in the first OFDM symbol; wherein the third number is an even number.

[0103] The third number refers to the number of positions to be transmitted, and the third number is an even number. In an example, the data transmission can start from the third number of chips / modulation symbols in the first OFDM symbol. When the first communication device is a terminal device, the terminal device also supports a Cyclic Prefix (CP) operation.

[0104] In an embodiment, the signal transmission method applied to the first communication device further comprises: configuring or reporting the modulation and coding strategy by using a segmentation indication method.

[0105] The segmentation indication method refers to segmenting and indicating a larger data block during data transmission, so as to better control and process the data. The modulation and coding strategy refers to a predefined combination scheme used to achieve efficient and reliable data transmission. When the first communication device is a reader, the modulation and coding strategy can be configured by using the segmentation indication method; when the first communication device is a terminal device, the modulation and coding strategy can be reported by using the segmentation indication method.

[0106] In an embodiment, the modulation and coding strategy comprises at least one of an index / number, a number of samples corresponding to one OFDM symbol, and / or a modulation scheme, a coding scheme and a code rate.

[0107] The modulation and coding strategy can comprise at least one of an index / number, a number of samples corresponding to one OFDM symbol, and / or a modulation scheme, a coding scheme and a code rate. The index / number is used to locate the corresponding modulation and coding strategy, for example, the index / number can be composed of a number. In the case that the number of samples corresponding to one OFDM symbol is set to a specific value, it can represent a modulation scheme other than OOK, such as BPSK. In the case that the specific value can be -1 or none or Not a Number (Nan) or null. The modulation scheme comprises at least one of OOK and / or BPSK and / or subcarrier modulation, wherein the subcarrier modulation correlation coefficient takes a value of a. In the case that a is used to represent the correlation information between the number of subcarriers / square waves and the coded modulation symbols, for example, the period of subcarriers / square waves is T square , the duration of one chip / modulation symbol is T chip , then a = T chip / T square , which represents the number of subcarriers / square waves in one modulation symbol is a. The coding scheme can comprise at least one of Convolutional Code (CC) and / or Manchester code and / or Miller code and / or FM0 code. In an example, the modulation and coding strategy can be displayed in the form of a table.

[0108] In some embodiments, when the index / sequence number is less than a first threshold, an OOK waveform based on OFDM is adopted for transmission; and / or when the index / sequence number is not less than the first threshold, an OOK waveform based on Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) is adopted for transmission. In some embodiments, when the index / sequence number is less than the first threshold, the number of samples corresponding to an OFDM symbol is not greater than a second threshold; and / or when the index / sequence number is not less than the first threshold, the number of samples corresponding to an OFDM symbol is not less than the second threshold. The first threshold is not less than 0 and not greater than 1 / 4 of the total number of indexes / sequence numbers. The second threshold is not less than 1 and not greater than 8. In some embodiments, when the index / sequence number is less than a third threshold, the value of M is not greater than a fourth threshold; and / or when the index / sequence number is not less than the third threshold, the number of samples corresponding to an OFDM symbol is not less than the fourth threshold. The third threshold is not less than 1 / 4 of the total number of indexes / sequence numbers and not greater than the total number of indexes / sequence numbers minus 1. The fourth threshold is not less than 8 and not greater than 24.

[0109] FIG. 5 is a flowchart of another signal transmission method provided by the embodiments of the present application. The present embodiment is applied to the case where the second communication device transmits signals using the minimum resource scheduling time unit, and can be executed by the second communication device. As shown in FIG. 5, the present embodiment includes S210-S220.

[0110] S210, receiving control signaling sent by the first communication device.

[0111] The control instruction refers to an instruction for controlling the second communication device to determine the minimum resource scheduling time unit. In an embodiment, the control instruction can include a scaling factor index, a scaling factor value, and a modulation scheme. After receiving the control instruction, the minimum resource scheduling time unit can be determined according to the control instruction. In an embodiment, the first communication device can be a terminal device or a reader. When the first communication device is a reader, the second communication device is a terminal device; when the first communication device is a terminal device, the second communication device is a reader.

[0112] S220, determining the minimum resource scheduling time unit according to the control signaling.

[0113] In an example, at least one of a chip / modulation symbol duration, an OFDM symbol duration, a plurality of OFDM symbol durations, a slot duration, and a subframe duration can be determined as the minimum resource scheduling time unit according to the control instruction.

[0114] In an embodiment, the control signaling indicates one of: a scaling factor index; a scaling factor value; a modulation scheme.

[0115] The scaling factor index refers to a data structure for fast locating and retrieving a scaling factor. In an example, the scaling factor can be stored in a scaling factor set, and the scaling factor required can be quickly found by the scaling factor index. The scaling factor value refers to the value of the scaling factor. In an example, the scaling factor value can include, but is not limited to, at least one of 1, 1 / 2, 1 / 4, 1 / 6, 1 / 8, 1 / 16, 1 / 24, 1 / 32, 1 / 64. The modulation scheme refers to a way of converting a signal into a signal suitable for channel transmission. In an example, the modulation scheme can include at least OOK modulation mode and BPSK modulation mode.

[0116] In an embodiment, the minimum resource scheduling time unit is a positive multiple of the chip / modulation symbol length of the uplink transmission; the minimum resource scheduling time unit is determined according to the control signaling, including one of: determining the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission according to the scaling factor index and the candidate minimum resource scheduling unit duration; determining the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission according to the scaling factor value and the reference minimum resource scheduling unit duration; determining the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission according to at least one of the modulation scheme, the single subcarrier spacing size and the scaling factor value.

[0117] The candidate minimum resource scheduling unit duration refers to a possible minimum resource scheduling unit duration that can be selected in a specific case, which can be pre-set; the reference minimum resource scheduling unit duration refers to a pre-defined basic scheduling unit duration, which is used as a benchmark for measuring and comparing other time parameters.

[0118] In an example, the minimum resource scheduling time unit is a positive multiple of the chip / modulation symbol length of the uplink transmission. The scaling factor can be stored in a scaling factor set. The corresponding scaling factor value can be looked up by the scaling factor index. The minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission can be determined according to the scaling factor value and the candidate minimum resource scheduling unit duration. For example, if the candidate minimum resource scheduling unit duration set includes at least one of {0.521, 0.694, 1.042, 1.389, 1.667, 2.083, 2.778, 3.333, 4.167, 5.556, 6.667, 8.333, 11.11, 16.67, 22.22, 26.67, 33.33, 44.44, 66.67, 133.3}us. If the scaling factor index is 13, the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission can be determined according to the index 13 and the candidate minimum resource scheduling unit duration set. Alternatively, the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission can be determined according to the scaling factor value and the reference minimum resource scheduling unit duration. Alternatively, the modulation scheme, the single subcarrier spacing size and the scaling factor value can be determined respectively. The minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission can be determined according to at least one of the modulation scheme, the single subcarrier spacing size and the scaling factor value.

[0119] In an embodiment, the control signaling indicates at least one of: uplink transmission bandwidth information; number of tones occupied by the uplink transmission; resource granularity; uplink subcarrier / orthogonal wave modulation related information; information related to the relationship between the number of subcarriers / orthogonal waves and the coded modulation symbols; uplink coding rate information; uplink data rate information; downlink transmission rate information; chip length in downlink transmission; minimum resource allocation unit duration in downlink transmission.

[0120] The uplink transmission bandwidth information refers to a bandwidth resource occupied by the second communication device for uplink data transmission to the first communication device. For example, the uplink transmission bandwidth information can include at least one of a frequency bandwidth of a single tone in uplink transmission / subcarrier spacing in uplink transmission, a frequency interval between two adjacent single tones or subcarriers occupied by uplink transmission. In an example, the uplink transmission bandwidth information can be a product of a number of single tones occupied by uplink transmission and a frequency bandwidth of a single tone / subcarrier spacing, and a sum of a product of a frequency interval between (number of single tones occupied by uplink transmission-1) adjacent single tones / subcarriers; or a product of a number of single tones occupied by uplink transmission and a frequency bandwidth of a single tone / subcarrier spacing; or a product of a frequency interval between (number of single tones occupied by uplink transmission-1) adjacent single tones / subcarriers. The number of single tones occupied by uplink transmission refers to a number of single tones used by a station in uplink transmission; the number of resource elements refers to a total amount of resource elements for data transmission in a specific time and a specific frequency range; the uplink subcarrier / ton modulation related information refers to subcarrier / ton modulation related information in uplink transmission; the information related to a relationship between a number of subcarriers / tons and a code modulation symbol can include a ratio of a chip / modulation symbol duration to a period of a subcarrier / ton; the uplink coding rate information refers to coding rate related information in uplink transmission; the uplink data rate information refers to data rate related information in uplink transmission; and the downlink transmission rate information refers to data rate related information in downlink transmission.

[0121] In an embodiment, the minimum resource scheduling time unit is determined according to the control signaling, including at least one of: determining the minimum resource scheduling time unit or a chip / modulation symbol length of uplink transmission according to the uplink transmission bandwidth information; determining the minimum resource scheduling time unit or the chip / modulation symbol length of uplink transmission according to at least one of a chip length in downlink transmission and the uplink subcarrier / ton modulation related information; and determining the minimum resource scheduling time unit or the chip / modulation symbol length of uplink transmission according to at least one of the uplink transmission bandwidth information, the number of single tones occupied by uplink transmission, the uplink coding rate information, and the uplink subcarrier / ton modulation related information.

[0122] In an example, a product of the uplink transmission bandwidth information and the number of tones occupied by the uplink transmission can be determined, and an inverse of the product can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. Alternatively, a frequency interval between two adjacent tones can be determined, a sum of the product of the uplink transmission bandwidth information and the number of tones occupied by the uplink transmission and the frequency interval between two adjacent tones can be determined, and an inverse of the sum can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. Alternatively, an inverse of half of the sum can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. Alternatively, an inverse of half of the product can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. Alternatively, the number of tones occupied by the uplink transmission and the frequency interval between two adjacent tones can be determined, a sum of the number of tones occupied by the uplink transmission and the frequency interval between two adjacent tones can be determined, and an inverse of half of the product can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission.

[0123] For the uplink subcarrier / tone modulation, the O modulation symbol durations are used as the minimum time unit when allocating the time domain scheduling resources. O is a multiple of O in the above scheme. Wherein, a is used to represent the relevant information of the relationship between the number of subcarriers / tone and the coded modulation symbols, for example, the period of the subcarriers / tone is T square , and the chip / modulation symbol duration is T chip , then a = T chip / T square , which represents the number of subcarriers / tone in a modulation symbol is a. After the subcarrier / tone modulation, the chip length T chip can also be represented as T chip / a. The minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined by at least one of the relevant information of the uplink subcarrier / tone modulation and the chip length in the downlink transmission.

[0124] Alternatively, the relevant information about the relationship between the number of subcarriers / square waves and the number of coded modulation symbols, the product of the number of tones occupied by the uplink transmission and the uplink transmission bandwidth information, and the reciprocal of the product can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. Alternatively, the relevant information about the relationship between the number of subcarriers / square waves and the number of coded modulation symbols, the product of the number of tones occupied by the uplink transmission and the uplink transmission bandwidth information, the product of the product and R, and the double value of the reciprocal of the product can be used as the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission. R is at least one of 1 / 12, 1 / 6, 1 / 4, 1 / 3 and 1 / 2. In an embodiment, the time transmission mode of the control signaling includes: a downlink timing, an uplink timing and a guard interval; the guard interval includes: a downlink guard interval and an uplink guard interval.

[0125] In an example, the downlink timing, the uplink timing, the guard interval, the downlink guard interval and the uplink guard interval can be interpreted according to the description of the above embodiments, which will not be repeated here. In an embodiment, if the number of chips / modulation symbols contained in one OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in one OFDM symbol contains a check chip of a second value.

[0126] In an example, the first value refers to a pre-set threshold value. Exemplarily, the first value can include at least 24. The second value refers to the number of check chips. Exemplarily, the second value can include an integer greater than 0 and less than the number M of chips / modulation symbols in the OFDM symbol. The check chip is a mechanism for detecting and correcting errors in signal transmission. The check chip has a fixed level value, or carries a fixed bit value, or its level value is consistent with the first chip or the last chip in the M chips, or its level value is consistent with the level of its adjacent chips.

[0127] In an embodiment, the signal transmission method applied to the second communication device further includes: configuring or reporting the modulation and coding in a segmented indication manner.

[0128] In an example, when the second communication device is a reader, the modulation and coding strategy can be configured in a segmented indication manner; when the second communication device is a terminal device, the modulation and coding strategy can be reported in a segmented indication manner.

[0129] In the following embodiments, the determination process of the minimum resource scheduling time unit is described in different examples.

[0130] Example 1. In order to prevent collision between devices and ensure data integrity, a millisecond-level minimum resource scheduling time unit scheme is proposed.

[0131] m*T chip , where the modulation symbol is an OOK, BPSK or FSK modulation symbol, T chip is a chip / modulation symbol duration.

[0132] For an A-IoT network, T c = 1 / (Δf max ·N f ), k = T s / T c , T s = 1 / (Δf ref ·N f,ref ). Wherein, T c is a slot duration, T s is a sampling time; N f is a subcarrier number; N f,ref is a number of samples contained in a slot; Δf max is a maximum subcarrier spacing configuration that can be supported by A-IoT downlink, N f = f s / Δf max , Δf ref is a minimum subcarrier spacing configuration that can be supported by A-IoT downlink, N f = f s / Δf ref , s is a sampling frequency.

[0133] Scheme 1: Taking OOK waveform as an example, for OOK waveform based on OFDM, when allocating time domain scheduling resources, m modulation symbol durations are taken as the minimum time unit for scheduling. For example, Δf = 15 kHz, N = 2048-point IFFT, the number of OOK symbols in 1 OFDM symbol is M, when T chip is the same, m modulation symbol durations are m*T chip ; when T chip is not the same, m modulation symbol durations are wherein, represents the duration of the i-th chip / modulation symbol in M chips / modulation symbols, i is a value in the interval of 0 to M-1. Wherein, m≤M.

[0134] m = M or m = M*Δf*10 -3 , Δf is a subcarrier spacing SCS; wherein, T chip = N chip *k*T c , T c is a slot duration, N chipThe number of chips / modulation symbols is k=T s / T c .

[0135] N chip The number of samples corresponding to one chip or one OOK modulation symbol is N chip =N / M, or N chip =(N+N cp ) / M. Wherein, N corresponds to N f or N f,ref in 5G NR; M is the number of chips / modulation symbols in one OFDM symbol; N cp is the number of cyclic prefixes.

[0136] If N cannot be divided by M or (N+N cp ) cannot be divided by M, the duration of m modulation symbols is 1ms, T chip =1ms / (M*(Δf*10 -3 -Δf / Δf ref )), or T chip =1ms / (M*Δf*10 -3 ), or T chip =1ms / (M*12), or T chip =1 / (Δf ref ·N f,ref )*N f,ref / M, or T chip =(T cp +1 / (Δf ref ·N f,ref )*N f,ref ) / M, or T chip is within the interval of 1 / (Δf*M) to 1ms / (M*(Δf*10 -3 -Δf / Δf ref )); wherein, M is the number of OOK symbols in one OFDM symbol; Δf is the subcarrier spacing SCS; Δf ref is the minimum subcarrier spacing configuration that can be supported by A-IoT downlink; N f,ref is the number of samples contained in one slot.

[0137] FIG. 6 is a schematic diagram of the relationship between cyclic prefix, OFDM symbol and OOK modulation symbol according to an embodiment. As shown in FIG. 6, the cyclic prefix CP is located in front of the OFDM symbol, and the OFDM symbol contains OOK modulation symbols.

[0138] In the process of resource allocation and data transmission, it is necessary to ensure that the transmission is aligned with the transmission unit in the conventional frame format.

[0139] Example 1: the transmission is aligned with the boundary of one OFDM symbol containing a cyclic prefix (CP).

[0140] Figure 7 is a schematic diagram of the alignment of the chip / modulation symbol duration and 0.5 ms or 7*n OFDM symbols containing a cyclic prefix according to an embodiment. As shown in Figure 7, the total length of the OFDM symbol is 0.5 ms, containing 7*n OFDM symbols containing a cyclic prefix. The starting position of the first chip / modulation symbol in the transmission is consistent with the starting position of the OFDM symbol containing a cyclic prefix (CP), wherein the duration of the first chip / modulation symbol is the sum of the duration of one chip / modulation symbol excluding the first and / or last chip / modulation symbol and the duration of the CP, or or or is in the interval of 1 / (Δf*M) to 1 ms / (M*Δf*10 -3 -Δf / Δf ref ) where j is a value in the interval of 0 to M-1 excluding 0 and / or M-1; wherein, is at least one of the above T chip values, is the number of samples corresponding to the first chip / modulation symbol; T cp is the duration of the cyclic prefix; Δf ref is the minimum subcarrier spacing that can be supported by the A-IoT downlink; N f,ref is the number of samples contained in one time slot; and M is the number of chips / modulation symbols in one OFDM symbol. Alternatively, the starting position of the first chip / modulation symbol in the transmission is consistent with the starting position of the OFDM symbol excluding the cyclic prefix (CP), wherein the duration of the first chip / modulation symbol is at least one of the above T chip values. Alternatively, the ending position of the ith chip / modulation symbol in the transmission is aligned with the ending position of one OFDM symbol, wherein the duration of the ith chip / modulation symbol is at least one of the above T chip values.

[0141] Example 2: the transmission duration of every n*C or n*C+1 or n*(C+1) chips / modulation symbols in the transmission is aligned with 0.5 ms or 7*n OFDM symbols containing a cyclic prefix (CP). Wherein C is the number of chips corresponding to one OFDM symbol minus one or plus one, M is the number of chips / modulation symbols in one OFDM symbol, and n is an integer not less than 1. The duration of one chip / modulation symbol is in the range of (0.5 ms-1 / (2Δf ref )) / (n·(C+1)) to 0.5 ms / (n·C), wherein Δf refThe minimum subcarrier spacing that can be supported by A-IoT downlink; or, the chip / modulation symbol duration is 0.5ms / (n*C), or 0.5ms / (n*C+1), or 0.5ms / (n*(C+1)); or, the chip / modulation symbol duration is one of the above T chip At least one of the values, or the chip / modulation symbol duration including n*C chip / modulation symbols is 1 / (Δf ref *C) and the chip / modulation symbol duration of 1 chip / modulation symbol is 1 / (2Δf ref ); or, the chip / modulation symbol duration including n*C chip / modulation symbols is 1 / (Δf ref *C) and the chip / modulation symbol duration of n chip / modulation symbols is the cyclic prefix duration T cp .

[0142] If the 16-bit downsampling is performed, that is, 2048 sampling points become 128 points, one OFDM symbol is 128 points, that is, N=128, if M=6, M is the number of chip / modulation symbols in one OFDM symbol, then the integer division cannot be performed, if the integer is taken, then it is not enough, if the integer is taken, then it is more, and the more needs to be transmitted. If the accumulation is performed all the time, a whole chip / modulation symbol length will be more.

[0143] Example 3: The transmission duration of every n*C or n*C+1 or n*(C+1) chip / modulation symbols in the transmission is aligned with 1ms or 14*n absolute symbols containing a cyclic prefix CP. Wherein, n is an integer and is not less than 1; C is obtained by subtracting or adding 1 from the number of chips corresponding to one OFDM symbol, M is the number of chip / modulation symbols in one OFDM symbol; Δf ref is the minimum subcarrier spacing that can be supported by A-IoT downlink. The chip / modulation symbol duration is in the range of (1ms-1 / (2Δf ref ) / (n*(C+1)) to 1ms / (n*C); or, the chip / modulation symbol duration is 1ms / (n*C), or 1ms / (n*C+1), or 1ms / (n*(C+1)); or, the chip / modulation symbol duration is one of the above T chip values, or the chip / modulation symbol duration including n*C chip / modulation symbols is 1 / (Δf ref *C) and the chip / modulation symbol duration of 1 chip / modulation symbol is 1 / (2Δf ref ); or, the chip / modulation symbol duration including n*C chip / modulation symbols is 1 / (Δf ref *C) and the chip / modulation symbol duration of n chip / modulation symbols is the cyclic prefix duration Tcp .

[0144] Example 4: a timing offset is appended after every n*C or n*C+1 or n*(C+1) chips / modulation symbols in the transmission to ensure alignment with at least one of the boundary of an OFDM symbol with CP, an OFDM symbol without CP, half of a slot, a slot boundary or a subframe boundary. The duration of a chip / modulation symbol is The timing offset is located before the end of 7 OFDM symbol durations; the duration of a chip / modulation symbol is The timing offset is located before the end of 7 OFDM symbol durations with CP; or, the duration of a chip / modulation symbol is The timing offset is located before the end of 14 OFDM symbol durations; or, the duration of a chip / modulation symbol is The timing offset is located before the end of 15 OFDM symbol durations; or, the duration of a chip / modulation symbol is The timing offset is located before the end of 2 slot durations; where N f,ref is the number of samples contained in a slot; C is the number of chips corresponding to one OFDM symbol minus one or plus one.

[0145] Scheme 2: for single-tone waveform, m modulation symbol durations are used as the minimum time unit for scheduling when allocating time domain scheduling resources. The duration of a chip / modulation symbol is T chip = 1 / f tx (for single sideband modulation), or T chip = 1 / (f tx / 2) (for double sideband modulation). Where f tx is the bandwidth occupied by the transmission or the width of a single carrier configured for the transmission or the frequency interval between single carriers configured for the transmission. Where m is (f tx * 10 -3 -1) (aligning with CP) or (f tx * 10 -3 ) (aligning without CP) or (f tx * 10 -3 -k) or (f tx * 10 -3 *k); aligning with a slot, if a slot includes 14 OFDM symbols with CP or 15 OFDM symbols without CP.

[0146] k = T ref / Tchip or k = f tx / f ref or k = f tx / (f ref *2); T ref is the sampling duration; T chip is one chip / modulation symbol duration.

[0147] In an embodiment, FIG. 8 is a schematic diagram of a multiple single-tone waveform provided by the present embodiment. For multiple single-tone waveforms, O modulation symbol durations are used as the minimum time unit for scheduling when allocating time-domain scheduling resources. One chip / modulation symbol duration is T chip = 1 / (β*f tx +f guard ) or T chip = 1 / (β*(f tx +f guard ))(for single sideband modulation), or T chip = 1 / ((β*f tx +f guard ) / 2), or T chip = 1 / (β*(f tx +f guard ) / 2)(for double sideband modulation).

[0148] For single sideband modulation, O is (β*f tx *10 -3 -1) or (β*f tx *10 -3 ) or (β*f tx *10 -3 -k), or ((β*f tx +f guard )*10 -3 -1) or ((β*f tx +f guard )*10 -3 ) or ((β*f tx +f guard )*10 -3 -k), or (β*(f tx +f guard )*10 -3 -1) or (β*(f tx +f guard )*10 -3 ) or (β*(f tx +f guard )*10 -3 -k); for double sideband modulation, the corresponding O values are 1 / 2 of the above m values; wherein k takes at least one of the following values: k = Tref / T chip or k = β * f tx / f ref or k = β * f tx / (f ref *2), or k = β * (f tx +f guard ) / f ref or k = β * (f tx +f guard ) / (f ref *2), or k = β * (f tx +f guard ) / f ref or k = β * (f tx +f guard ) / (f ref *2); wherein f tx is the bandwidth occupied by the single-tone transmission; wherein f guard is the frequency interval between two adjacent single tones; wherein β is the number of single tones.

[0149] Scheme 3: define the minimum resource scheduling unit for different device types.

[0150] The device includes a first communication device and a second communication device. The first communication device performs a first uplink transmission mode and / or supports a first energy consumption level / type; the second communication device performs a second uplink transmission mode and / or supports a second energy consumption level / type. In the first transmission mode, the minimum resource scheduling unit is a first minimum resource scheduling unit; in the second transmission mode, the minimum resource scheduling unit is a second minimum resource scheduling unit. In the first transmission mode, the transmission bandwidth configuration is not included; in the second transmission mode, the transmission bandwidth configuration and / or the number of single tones occupied by the uplink transmission and / or the number of resource particles and / or the subcarrier interval size are included.

[0151] For the first communication device, an index or a scaling factor value or a modulation scheme is indicated by the downlink control signaling, and the minimum resource scheduling unit determination scheme includes: the first communication device receives the downlink control signaling, and determines the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission according to the indicated index and the candidate minimum resource scheduling unit duration; or the first communication device receives the downlink control signaling, and determines the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission according to the indicated scaling factor and the reference minimum resource scheduling unit duration; or the first communication device receives the downlink control signaling, and determines the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission according to the indicated modulation scheme and / or the single subcarrier interval size and / or the scaling factor.

[0152] The scaling factor is determined according to a scaling factor index indicated by control signaling and a candidate scaling factor set. The candidate scaling factor set includes at least one of 1, 1 / 2, 1 / 4, 1 / 6, 1 / 8, 1 / 16, 1 / 24, 1 / 32, 1 / 64. The number of information bits indicating the scaling factor index in the control signaling is in the range of 0-4 or Wherein, n is the total number of candidate values in the candidate scaling factor set.

[0153] In example 1, the candidate minimum resource scheduling unit duration set includes at least one of {0.521, 0.694, 1.042, 1.389, 1.667, 2.083, 2.778, 3.333, 4.167, 5.556, 6.667, 8.333, 11.11, 16.67, 22.22, 26.67, 33.33, 44.44, 66.67, 133.3}us. The device receives downlink control signaling indicating index 13, and determines the minimum resource scheduling unit duration as 16.67us according to index 13 and the candidate minimum resource scheduling unit duration set.

[0154] In example 2, the reference minimum resource scheduling unit duration is 66.67us. The first communication device receives downlink control signaling (control instruction) indicating the scaling factor as 2, and the minimum resource scheduling unit duration is 133.3us. Or, the first communication device receives downlink control signaling (control instruction) indicating the scaling factor as 1 / 2, and the minimum resource scheduling unit duration is 33.33us.

[0155] In example 3, when the modulation scheme is OOK, the first communication device determines the minimum resource scheduling unit or the chip / modulation symbol length of uplink transmission according to the scaling factor and the reference minimum resource scheduling unit duration under OOK modulation mode. When the modulation scheme is BPSK, the device determines the minimum resource scheduling unit or the chip / modulation symbol length of uplink transmission according to the scaling factor and the reference minimum resource scheduling unit duration under BPSK modulation mode.

[0156] For the second communication device, the device receives downlink control signaling (control instruction), wherein the control signaling indicates uplink transmission bandwidth information, and / or the number of tones occupied by uplink transmission β, and / or the number of resource particles, and / or information related to uplink subcarrier / rectangular wave modulation, and / or information related to the relationship between the number of subcarriers / rectangular waves and one coded modulation symbol, and / or uplink coding rate information, and / or uplink data rate information, and / or downlink transmission rate information, and / or chip length in downlink transmission, and / or minimum resource allocation unit duration in downlink transmission, then the minimum resource scheduling unit determination scheme includes:

[0157] The device determines the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission according to the configured transmission bandwidth. The chip / modulation symbol length of the uplink transmission is T chip = 1 / (β*f tx ) or T chip = 1(β*f tx +f guard ) or T chip = 1 / (β*(f tx +f guard )) or T chip = 1 / ((β*f tx ) / 2) or T chip = 1 / ((β*f tx +f guard ) / 2) or T chip = 1 / (β*(f tx +f guard ) / 2). Wherein, β is the number of tones or the number of subcarriers / square waves in one modulation symbol; wherein, f tx is the bandwidth occupied by the tone transmission; f guard is the frequency interval between two adjacent tones; β is the number of tones; T chip is the length of one chip / modulation symbol.

[0158] The second communication device determines the length of the minimum resource allocation unit in the uplink transmission according to the chip length in the downlink transmission and / or the information related to the uplink subcarrier / square wave modulation.

[0159] The second communication device determines the length of the minimum resource allocation unit in the uplink transmission according to the uplink transmission bandwidth information, and / or the number of tones β occupied by the uplink transmission, and / or the uplink coding rate information R, and / or the information related to the uplink subcarrier / square wave modulation α. For example, T chip = 1 / (α*β*f tx )*R or T chip = 2 / (α*β*f tx )*R; wherein, T chip is the length of one chip / modulation symbol; β is the number of tones; f tx is the bandwidth occupied by the tone transmission.

[0160] R is at least one of 1 / 12, 1 / 6, 1 / 4, 1 / 3 and 1 / 2. Wherein, α is used to represent the relationship between the number of subcarriers / square waves and one coding modulation symbol, for example, the period of the subcarriers / square waves is T square , and the length of one chip / modulation symbol is T chip , then α = T chip / T square, indicates the number of subcarriers / square waves in a modulation symbol is α. indicates the number of subcarriers or square waves contained in a modulation symbol.

[0161] For the second communication device, the second communication device receives downlink control signaling (control instruction), wherein the control signaling indicates uplink transmission bandwidth information. The uplink transmission bandwidth information includes at least one of the number of tones β occupied by the uplink transmission, the frequency bandwidth occupied by the tone in the uplink transmission / subcarrier spacing in the uplink transmission, and the frequency spacing between two adjacent tones or subcarriers occupied by the uplink transmission. The control signaling indicates an uplink transmission resource index, and the device determines the uplink transmission bandwidth information according to the index.

[0162] The uplink transmission bandwidth is (β*frequency bandwidth occupied by the tone / subcarrier spacing)+(β-1)*frequency spacing between adjacent tones / subcarriers, or (β*frequency bandwidth occupied by the tone / subcarrier spacing), or (β-1)*frequency spacing between adjacent tones / subcarriers; wherein β is the number of tones.

[0163] Example 1, as shown in Table 2, the index can be used to determine the number of tones, the frequency bandwidth occupied by the tone / subcarrier spacing, and the frequency spacing between adjacent tones / subcarriers. Wherein the number of tones is not less than 1, and the frequency bandwidth occupied by the tone / subcarrier spacing is not greater than 960 kHz. Wherein when the number of tones is 1, the frequency spacing between adjacent tones / subcarriers is equal to 0; when the number of tones is greater than 1, the frequency spacing between adjacent tones / subcarriers takes a value between W0 and Wmax. Wherein W0 takes a value not less than 2 times the frequency bandwidth occupied by the tone / subcarrier spacing, and not greater than Wmax. Wherein Wmax is the size of the uplink transmission coherence bandwidth or the value of 1 divided by the spread delay. Wherein N is a value greater than 1 and not greater than 64. W is a value not less than 1. Wherein the frequency spacing between adjacent tones / subcarriers takes a value related to the number of tones and / or the frequency bandwidth occupied by the tone / subcarrier spacing.

[0164] Table 2

[0165] Example 2, as shown in Table 3, the frequency spacing between adjacent tones / subcarriers is a fixed value, and the index can be used to determine the number of tones and the frequency bandwidth occupied by the tone / subcarrier spacing.

[0166] Table 3

[0167] Example 3, as shown in Table 4, the frequency spacing between adjacent tones / subcarriers is a fixed value, and the index can be used to determine the frequency bandwidth occupied by the tone / subcarrier spacing.

[0168] Table 4

[0169] Scheme 4: In an embodiment, FIG. 9 is a diagram of a fine-tuned chip length according to an embodiment. As shown in FIG. 9, the chip length changes after modulation. For subcarrier / square wave modulation, the time domain scheduling resource is allocated in units of O modulation symbol durations. O is a multiple of a in the above scheme.

[0170] a is used to represent the relationship between the number of subcarriers / square waves and one coded modulation symbol, for example, the period of a subcarrier / square wave is T square , and the duration of one chip or one modulation symbol is T chip , then a = T chip / T square , which means that the number of subcarriers / square waves in one modulation symbol is a.

[0171] After subcarrier / square wave modulation, the chip length T chip may also be expressed as T chip / a.

[0172] Scheme 6: Formulas are used to solve the problem of unequal lengths. In the transmission, the duration of each chip / modulation symbol is fixed and equal, or the duration of each chip / modulation symbol is determined by the following method.

[0173] Assuming that the duration of one OFDM symbol corresponds to the number of samples N ref , the number of samples N chip corresponding to each chip / modulation symbol in M chips / modulation symbols is determined, and the method specifically includes calculating the number of samples corresponding to each chip / modulation symbol, which is σ, where σ is 2 a , where a is an integer greater than or equal to 0, or is related to the sampling rate / link rate of the device, or is related to the sampling rate or rate of the base station or intermediate node user equipment or subcarrier spacing configuration; is the number of samples corresponding to the first chip / modulation symbol; is the number of samples corresponding to the second chip / modulation symbol.

[0174] The number of chips / modulation symbols corresponding to the number of samples is calculated, where the number of corresponding chips / modulation symbols is C0=M-C1, that is the number of corresponding chips / modulation symbols or C1=mod(N ref ,M), that is where C0 is the number of first chips / modulation symbols, and C1 is the number of second chips / modulation symbols.

[0175] refthe number of samples corresponding to one OFDM symbol, or the total number of samples corresponding to M chips / modulation symbols, or the number of samples corresponding to one OFDM symbol or the total number of samples corresponding to M chips / modulation symbols under the condition of the sampling rate of the device side.

[0176] corresponding to the first chip / modulation symbol duration corresponding to the second chip / modulation symbol duration

[0177] In some embodiments, one OFDM symbol includes M chips / modulation symbols, and one OFDM symbol includes C0 number of samples or chips / modulation symbols with a duration of or and C1 number of samples or chips / modulation symbols with a duration of or .

[0178] In some embodiments, the first chip / modulation symbol sample number and the second chip / modulation symbol sample number differ by no less than 0 and no more than σ.

[0179] The length of each chip / modulation symbol or the starting position of each chip / modulation symbol in the M chips / modulation symbols is determined in at least one of the following ways: C0 chips / modulation symbols corresponding to the sample number are placed on the left or at the beginning, for example, [0:C00-1, C00:C00+C1-1], or for example, or C1 chips / modulation symbols corresponding to the sample number are placed on the left or at the beginning, for example, [0:C11-1, C1:C0+C1-1] or for example, or C0 chips / modulation symbols corresponding to the sample number are placed on the left or at the beginning and on the right or at the end, for example, or for example, wherein C0 is the number of first chips / modulation symbols or C1 chips / modulation symbols corresponding to the sample number are placed on the left or at the beginning and on the right or at the end, for example, or for example, or C0 chips / modulation symbols corresponding to the sample number and 1 chip / modulation symbol corresponding to the sample number are placed every interval, for example, when C1>C0, for example, when C0>C1, for example, when C0=C1, Or when C1>C0, each corresponding sample number is chips / modulation symbols and each corresponding sample number is chips / modulation symbols and adjacent placement, for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols before, or for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols after, or for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols between, Or when C0>C1, each corresponding sample number is chips / modulation symbols and each corresponding sample number is chips / modulation symbols and adjacent placement, for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols before, or for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols after, or for example, the sample number of chips / modulation symbols is located sample number of chips / modulation symbols between, Or wherein, the above represents the upward rounding of "·", represents the downward rounding of "·". In the technical solution of the present application, Or can also be replaced by at least one of the downward rounding or upward rounding, or rounding, or retaining the original value.

[0180] In the length of the chip / modulation symbol or the starting position determination scheme of the chip / modulation symbol in the above M chips / modulation symbols, Can also be changed to A chip / modulation symbol length of a y+1th chip / modulation symbol in a chip / modulation symbol representing a Cxth chip / modulation symbol length of a (x+1)th chip / modulation symbol.

[0181] In the transmission, 1 OFDM symbol (not including CP) includes M chips / modulation symbols, 1 OFDM symbol corresponds to N ref = 2048, the length of each chip / modulation symbol is fixed and equal, there is a timing offset (Δt) at the end of the transmission of every M chips / modulation symbols, and under the configuration of a subcarrier spacing SCS = 15 kHz, the length of each chip / modulation symbol in M chips / modulation symbols and the number of samples are shown in Table 5.

[0182] Table 5 Length of each chip / modulation symbol in M chips / modulation symbols and the number of samples under the configuration of a subcarrier spacing SCS = 15 kHz

[0183] In the transmission, the length of each chip / modulation symbol is determined by the formula N chip · T ref , and the length of each chip / modulation symbol during each pre-defined time length (such as an OFDM symbol including CP) is shown in Table 6.

[0184] Table 6 Length of each chip / modulation symbol in M chips / modulation symbols and the number of samples under the configuration of a subcarrier spacing SCS = 15 kHz

[0185] In some embodiments, when the downlink transmission configuration satisfies a first condition, the M chips / modulation symbols include a third chip / modulation symbol length. Wherein the third chip / modulation symbol length is at least one of The number of samples corresponding to the third chip / modulation symbol length is at least one of The third chip / modulation symbol length is at least one of Or The number of samples corresponding to the third chip / modulation symbol length is at least one of Or ; wherein, is the third chip / modulation symbol length; is the number of samples corresponding to the third chip / modulation symbol length; is the first chip / modulation symbol length; is the second chip / modulation symbol length; N cp is the number of cyclic prefixes; and cp is the length of the cyclic prefix.

[0186] In some embodiments, when the downlink transmission configuration satisfies a first condition, a fourth chip / modulation symbol duration is included in the M chips / modulation symbols. The fourth chip / modulation symbol duration is at least one of The fourth chip / modulation symbol duration corresponds to a number of samples The fourth chip / modulation symbol duration is Or Or Or Or Or Or Or T cp The fourth chip / modulation symbol duration corresponds to a number of samples Or Or Or Or Or Or N cp At least one of the first condition includes N cp > δ · N chip Or T cp > δ · T chip Or M ≥ 24, or the M chips include at least one of Check chips. Wherein δ is an integer between 1 and M. Wherein the check chip has a fixed level value, or carries a fixed bit value, or its level value is consistent with the first chip or the last chip in the M chips, or its level value is consistent with the level of its adjacent chips.

[0187] In some embodiments, when the downlink transmission configuration satisfies a first condition and / or a second condition, a fifth chip / modulation symbol duration is included in the M chips / modulation symbols. The fifth chip / modulation symbol number of samples and duration are And Wherein the second condition includes at least one of C0≠C1, or Wherein T1 is the first chip / modulation symbol duration; T2 is the second chip / modulation symbol duration; C0 is the number of first chips / modulation symbols; C1 is the number of second chips / modulation symbols. The fifth chip / modulation symbol duration and other chip / modulation symbol durations are determined in at least one of the following ways: Or Or Or Or When the fifth chip / modulation symbol duration is included in the M chip / modulation symbols, the final chip / modulation symbol duration of each chip / modulation symbol is corrected to M-δ and δ fifth chip / modulation symbol durations; or, if C0=2-C1and the fifth chip / modulation symbol duration is or or or or or or or or or When the fifth chip / modulation symbol duration is included in the M chip / modulation symbols, the final chip / modulation symbol duration of each chip / modulation symbol is corrected to chips chips and δ fifth chip / modulation symbol durations; or to chips chips and δ fifth chip / modulation symbol durations. The correction is complete when C0=C1, the M chip / modulation symbols include the first chip / modulation symbol duration and the second chip / modulation symbol duration. Where δ is an integer between 1 and M.

[0188] If and the fifth chip / modulation symbol duration is or or or or or or or or or When the fifth chip / modulation symbol duration is included in the M chip / modulation symbols, the final chip / modulation symbol duration of each chip / modulation symbol is corrected to chips chips and δ fifth chip / modulation symbol durations; or to chips chips and δ fifth chip / modulation symbol durations. Where δ is an integer between 1 and M.

[0189] Introducing the fifth chip / modulation symbol length ensures that the length of each Manchester encoded code word is equal.

[0190] Example 1, assuming in downlink transmission, SCS = 15 kHz, M = 24 chips / modulation symbols are transmitted in each OFDM symbol duration, one check chip is included in every M chips / modulation symbols, and δ = 2. 2048 points are included. One slot includes 14 OFDM symbols, one OFDM symbol has two types of N chips / modulation symbols, one is 160, and the other is 144; then 24 chips / modulation symbols include three chip / modulation symbol durations, and the chip / modulation symbol duration distribution at each chip / modulation symbol position includes at least one of the following: the duration of the Mthchip / modulation symbol is the third chip / modulation symbol duration. Among them, the sample number of the 1st-8thchip / modulation symbol is 84, the sample number of the 9th-23rdchip / modulation symbol is 86, and the sample number of the 24thchip / modulation symbol is 230 (86+144) or 246 (86+160); or, the duration of the Mthchip / modulation symbol is the third chip / modulation symbol duration. Among them, the sample number of the 1st-16thchip / modulation symbol is 86, the sample number of the 17th-23rdchip / modulation symbol is 84, and the sample number of the 24thchip / modulation symbol is 228 (84+144) or 244 (84+160); or, the duration of the Mthchip / modulation symbol is the third chip / modulation symbol duration. Among them, the sample number of the 1st, 3rd, 5th, 7th, 9th, 10th, 11th, 13th, 14th, 15th, 17th, 18th, 19th, 21st, 22nd, 23rdchip / modulation symbol is 86, the sample number of the 2nd, 4th, 6th, 8th, 12th, 16th, 20th, 24thchip / modulation symbol is 84, and the sample number of the 24thchip / modulation symbol is 228 or 244; or, the duration of the Mthchip / modulation symbol is the third chip / modulation symbol duration. Among them, the sample number of the 2nd, 4th, 6th, 8th, 10th, 11th, 12th, 14th, 15th, 16th, 18th, 19th, 20th, 22nd, 23rd, 24thchip / modulation symbol is 86, the sample number of the 1st, 3rd, 5th, 7th, 9th, 13th, 17th, 21stchip / modulation symbol is 84, and the sample number of the 24thchip / modulation symbol is 230 or 246; or, the duration of the Mthchip / modulation symbol is the fifth chip / modulation symbol duration. Among them, the sample number of the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th, 21st, 23rdchip / modulation symbol is 86, the sample number of the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, 20th, 22nd, 24thchip / modulation symbol is 84, and the sample number of the 24thchip / modulation symbol is 236 (84+144+(24 / 6)*2) or 252 (244+(24 / 6)*2); or, the duration of the first chip / modulation symbol is the third chip / modulation symbol duration.The sample number of the first chip / modulation symbol is 230 or 246, the sample number of the second to sixteenth chip / modulation symbol is 86, and the sample number of the seventeenth to twenty-fourth chip / modulation symbol is 84; or the time length of the first chip / modulation symbol is the time length of the third chip / modulation symbol. The sample number of the first chip / modulation symbol is 228 or 244, the sample number of the second to eighth chip / modulation symbol is 84, and the sample number of the ninth to twenty-fourth chip / modulation symbol is 86; or the time length of the first chip / modulation symbol is the time length of the third chip / modulation symbol. The sample number of the first, third, fifth, seventh, ninth, tenth, eleventh, thirteenth, fourteenth, fifteenth, seventeenth, eighteenth, nineteenth, twenty-first, twenty-second, and twenty-third chip / modulation symbol is 86, the sample number of the second, fourth, sixth, eighth, twelfth, sixteenth, twentieth, and twenty-fourth chip / modulation symbol is 84, and the sample number of the first chip / modulation symbol is 230 or 246; or the time length of the first chip / modulation symbol is the time length of the third chip / modulation symbol. The sample number of the second, fourth, sixth, eighth, tenth, eleventh, twelfth, fourteenth, fifteenth, sixteenth, eighteenth, nineteenth, twentieth, twenty-second, twenty-third, and twenty-fourth chip / modulation symbol is 86, the sample number of the first, third, fifth, seventh, ninth, thirteenth, seventeenth, twenty-first chip / modulation symbol is 84, and the sample number of the first chip / modulation symbol is 228 or 244; or the time length of the first chip / modulation symbol is the time length of the fourth chip / modulation symbol, and the time length of the Mth chip / modulation symbol is the time length of the fourth chip / modulation symbol. The sample number of the first chip / modulation symbol is 156 (cp / 2) or 164, the sample number of the second to ninth chip / modulation symbol is 84, the sample number of the tenth to twenty-third chip / modulation symbol is 86, and the sample number of the twenty-fourth chip / modulation symbol is 158 or 166; or the time length of the first chip / modulation symbol is the time length of the fourth chip / modulation symbol, and the time length of the Mth chip / modulation symbol is the time length of the fourth chip / modulation symbol. The sample number of the first chip / modulation symbol is 168 or 170 or 172, the sample number of the second to ninth chip / modulation symbol is 84, the sample number of the tenth to twenty-third chip / modulation symbol is 86, and the sample number of the twenty-fourth chip / modulation symbol is 144 or 160 or 172. That is, 86*2. The time length of the first chip / modulation symbol is the time length of the fourth chip / modulation symbol, and the time length of the Mth chip / modulation symbol is the time length of the fourth chip / modulation symbol. The sample number of the first chip / modulation symbol is 168 or 170 or 172, the sample number of the second, fourth, sixth, eighth, tenth, eleventh, twelfth, fourteenth, fifteenth, sixteenth, eighteenth, nineteenth, twentieth, twenty-second, twenty-third, and twenty-fourth chip / modulation symbol is 86, the sample number of the first, third, fifth, seventh, ninth, thirteenth, seventeenth, twenty-first chip / modulation symbol is 84, and the sample number of the twenty-fourth chip / modulation symbol is 144 or 160 or 172.

[0191] In some embodiments, the M chip / modulation symbols include a sixth chip / modulation symbol duration. Wherein the sixth chip / modulation symbol duration is The sixth chip / modulation symbol duration corresponds to a number of samples The sixth chip / modulation symbol duration is Or Or Or The sixth chip / modulation symbol duration corresponds to a number of samples Or Or Or At least one of the following: wherein C0=Nup-C1 The corresponding number of chip / modulation symbols Or mod(N ref , Nup). Wherein Nup=M+δ-1 or Nup=M+δ. Wherein δ is Or At least one of the following: Wherein N chip is Or Wherein δ+1 chips / modulation symbols in Nup are equivalent to one valid chip / modulation symbol, or carry one encoded bit / level; or Nup represents M valid chips / modulation symbols including M-1 valid chips / modulation symbols with a number of samples N chip And one valid chip / modulation symbol with a number of samples Or one valid chip / modulation symbol with a number of samples Indicates a valid chip / modulation symbol with a length of δ or δ+1 times the length of the other M-1 valid chip / modulation symbols.

[0192] In some embodiments, the M chip / modulation symbols include a sixth chip / modulation symbol duration when the downlink transmission configuration satisfies a first condition and / or a second condition and / or a third condition. Wherein the third condition includes Or Or Or Or M≥24. Wherein the sixth chip / modulation symbol duration corresponds to a number of samples N cp Or Wherein the sixth chip / modulation symbol represents Time-domain consecutive chip / modulation symbols with the same level. Wherein the sixth chip / modulation symbol or the sixth chip / modulation symbol duration corresponds to The third chip / modulation symbol and / or the fourth chip / modulation symbol and / or the fifth chip / modulation symbol and / or the sixth chip / modulation symbol are located at the end of an OFDM symbol.

[0193] In some embodiments, at least one of the third chip / modulation symbol and / or the fourth chip / modulation symbol and / or the fifth chip / modulation symbol and / or the sixth chip / modulation symbol is included in the duration of an OFDM symbol. The third chip / modulation symbol and / or the fourth chip / modulation symbol and / or the fifth chip / modulation symbol and / or the sixth chip / modulation symbol is located at the start of the OFDM symbol or at the first chip / modulation symbol, or at the end of the OFDM symbol or at the Mth chip / modulation symbol, or at the start of the CP of the OFDM symbol, or between the start of the Mth chip / modulation symbol and the end of the OFDM symbol, or between the start of the Mth chip / modulation symbol and the start of the CP of the next OFDM symbol, or between the start of the OFDM symbol and the end of the first chip / modulation symbol, or between the start of the CP of the OFDM symbol and the end of the first chip / modulation symbol.

[0194] Example II: To ensure the synchronization and efficiency of device transmission, a nanosecond / microsecond minimum resource scheduling time unit scheme is proposed.

[0195] The minimum resource scheduling time unit is defined as T chip , i.e., m = 1.

[0196] Example III: To meet the flexible scheduling requirement, a time transmission mode scheme is proposed.

[0197] The time transmission mode includes RD timing, DR timing and guard interval GP. The guard interval includes downlink guard interval (R2D guard interval) and downlink and uplink guard interval (D2R guard interval).

[0198] The R2D guard interval is located between the RD timing and the DR timing, and the R2D link transmission is in the front and the D2R link transmission is in the back.

[0199] The D2R guard interval is located between the DR timing and the RD timing, and the D2R link transmission is in the front and the R2D link transmission is in the back.

[0200] The duration of the R2D guard interval is related to at least one of the R2D link transmission duration, the M value, the subcarrier spacing, the coding rate and the data rate; the duration of the D2R guard interval is related to at least one of the D2R link transmission duration, the transmission frequency bandwidth, the coding rate, the backscattering link frequency, the subcarrier / square wave frequency and the data rate.

[0201] Example 1: The start position of the RD timing is aligned with the OFDM symbol or subframe boundary; the start position and the end position of the DR timing are aligned with the OFDM symbol or subframe boundary. There is no guard interval between the RD timing and the DR timing. This time transmission mode scheme is adopted for the second device type or the second transmission mode (i.e., supporting multi-tone).

[0202] In an embodiment, FIG. 10 is a schematic diagram of a time transmission mode provided by the embodiment. As shown in FIG. 10, the left picture shows that the RD link transmission is in the front and the DR link transmission is in the back; the right picture shows that the DR link transmission is in the front and the RD link transmission is in the back.

[0203] Example 2: The end position of the RD timing is not aligned with the OFDM symbol or subframe boundary; the end position of the R2D guard interval is aligned with the OFDM symbol or subframe boundary. This time transmission mode scheme is adopted for the first device type or the first transmission mode (i.e., supporting single tone) or a transmission other than the first transmission mode and the second transmission mode.

[0204] In an embodiment, FIG. 11 is a schematic diagram of another time transmission mode provided by the embodiment. As shown in FIG. 11, it is a downlink guard interval (R2D guard interval), the R2D guard interval is located between the RD timing and the DR timing, and the R2D link transmission is in the front and the D2R link transmission is in the back. Example 3: The end position of the DR timing is not aligned with the OFDM symbol or subframe boundary; the end position of the D2R guard interval is aligned with the OFDM symbol or subframe boundary. This time transmission mode scheme is adopted for the first device type or the first transmission mode or a transmission other than the first transmission mode and the second transmission mode.

[0205] In an embodiment, FIG. 12 is a schematic diagram of still another time transmission mode provided by the embodiment. As shown in FIG. 12, it is an uplink guard interval (D2R guard interval), the D2R guard interval is located between the DR timing and the RD timing, and the D2R link transmission is in the front and the R2D link transmission is in the back.

[0206] Example 4: The embodiment proposes a time transmission gap scheme to meet the time alignment requirement.

[0207] For the R2D transmission, when M is not equal to 2^n, a GAP time is added at every interval T time to ensure the time alignment with the slot boundary of the conventional 4G / 5G.

[0208] In an embodiment, FIG. 13 is a schematic diagram of a time transmission GAP scheme provided by the embodiment. As shown in FIG. 13, a GAP time can be added at every interval T time, and FIG. 13 takes T time as an example, which is a cyclic prefix, chip 0, chip 1, …, chip (M-1), a cyclic prefix, chip 0, chip 1, chip 2, and chip 3.

[0209] In an embodiment, FIG. 14 is a schematic diagram of another time transmission GAP scheme provided by the present embodiment. As shown in FIG. 14, for D2R transmission, a GAP is added after a fixed number of chips for alignment with a conventional OFDM symbol or subframe boundary. FIG. 14 takes the fixed number of chips as 7 as an example.

[0210] The GAP is calculated in the same way as the timing offset, or the time interval between the end position of the transmission limited bits and the OFDM symbol boundary where the end position is located.

[0211] Example Five, to ensure the performance of waveform detection based on OFDM, the present embodiment proposes a scheme of adding redundant information to ensure that the CP does not introduce additional transition edges.

[0212] Scheme 1: For the CP handling scheme based on Manchester transmission starting from the even number of chips / modulation symbols, applied to the case of M < 24.

[0213] When N cp > δ · N chip or T cp > δ · T chip or M ≥ 24, each M (first value) chips include (second value) check chips; T chip is the length of a chip / modulation symbol; and δ is an integer between 1 and M. Wherein, The positions of the check chips are located at the end of the M chips; or check chips are located at the beginning of the M chips; or At least one chip is located at the first chip / modulation symbol position of the M chips, and at least one chip is located at the last chip / modulation symbol position of the M chips.

[0214] The above-mentioned represents the upward rounding of “·”, and represents the downward rounding of “·”. In the technical scheme of the present application, or may also be replaced by at least one of the downward rounding, the upward rounding, the rounding, or the original value retention.

[0215] Scheme 2: When N cp > δ · N chip or T cp > δ · T chipor M≥24, the data transmission starts from the X(th numerical value)th chip / modulation symbol of the first OFDM symbol. Wherein X is an even number; N cp is the number of cyclic prefixes; T cp is the length of the cyclic prefix; δ is an integer between 1 and M; T chip is the length of one chip / modulation symbol. Wherein the device supports the CP removal operation. The CP removal operation means that the device skips N chip samples or T chip after the first sample after 2·N cp samples or T cp after the M / 2-1th jump along.

[0216] Fig. 15 is a configuration diagram provided by the embodiment based on the chip start position of the data transmission in the OFDM symbol of the CP removal operation. As shown in Fig. 15, 1 Manchester code word contains 2 OOK modulation symbols, and in the data transmission process, the chip start position can be determined from the third numerical value of the chip / modulation symbol of the first OFDM symbol, and the CP removal operation is performed to skip / remove the cyclic prefix length T cp .

[0217] Fig. 16 is a schematic diagram of a transmission scheme provided by the embodiment. Fig. 16(a) provides a CP removal scheme, i.e., without any processing on the generation method of the time domain signal, the device side needs to know the position of the CP and remove the CP to ensure that the edge detection has no error. Fig. 16(a) provides that by changing the transmission start position of the time domain signal, the level of the CP remains the same as that of the adjacent chip / modulation symbol, which ensures that the CP will not introduce additional jump edges, and reduces the probability of edge detection error.

[0218] Fig. 17 is a schematic diagram of the effect of a transmission scheme provided by the embodiment. As can be seen from Fig. 17, when M is large, the CP length is two chip / modulation symbol lengths, which causes the jump edge to appear in the CP. However, whether the CP position estimation is advanced or delayed, the transmission scheme shown in Fig. 16(b) will not cause additional edge detection errors.

[0219] Figure 18 is a schematic diagram of a scheme provided by the present embodiment based on the combination of a transmission scheme and a chip length definition scheme. Figure 18 is a transmission scheme provided by the present embodiment in combination with the third / fourth / fifth / sixth chip duration determination scheme. Figure 18(a) provides, for M = 24, that the length of the last chip within an OFDM symbol is set to be 2 times the length of the other chips, thereby ensuring that there is no additional edge within the CP. Figure 18(b) provides, for M = 24, that the length of the last chip within an OFDM symbol is set to be equal to the length of the CP, thereby ensuring that there is no additional edge within the CP.

[0220] Example Six, to ensure link stability, the present embodiment proposes a variety of modulation and coding scheme combinations channel quality indication (CQI) and modulation and coding scheme (MCS).

[0221] For OOK waveform transmission based on OFDM, it is necessary to ensure that the optional coding modulation scheme can provide a stable link budget table. The stable link budget table includes at least one of the following features: 1) the configuration parameters (such as M value) related to the modulation scheme in the optional modulation and coding scheme are arranged in ascending order; 2) the data rate or spectral efficiency corresponding to the optional modulation and coding scheme is arranged in ascending order; 3) the interval between adjacent data rates or spectral efficiencies is close or almost equal; 4) when the M value is not greater than a first threshold, the difference between adjacent M values is not less than 2 or not greater than half of the first threshold value; 5) when the M value is greater than the first threshold, the difference between adjacent M values is not less than 4 or not less than half of the first threshold value; 6) the interval between the working points of the target BLER corresponding to adjacent modulation and coding schemes is not less than 2 dB.

[0222] The spectral efficiency is related to the M value, the transmission bandwidth, and the code rate. The smaller the M value, the better the performance.

[0223] Example 1: Manchester coding with a code rate of 1 / 2, the number of OOK symbols M of one OFDM symbol duration is 2, 4, 12, and 24, and the SNR interval is 2 dB when the target BLER is 10%. The pre-defined modulation and coding scheme table is shown in Table 7.

[0224] Table 7

[0225] Example 2: Manchester coding with a code rate of 1 / 2, the number of OOK symbols M of one OFDM symbol duration is 2, 8, and 24, and the SNR interval is 5 dB when the target BLER is 10%. The pre-defined modulation and coding scheme table is shown in Table 8.

[0226] Table 8

[0227] Example 3: Manchester coding with code rate 1 / 2, the number of OOK symbols M in one OFDM symbol duration is 1, 24 and 32, and each modulation and coding mode also supports different number of repetitions. The pre-defined modulation and coding scheme table is shown in Table 9.

[0228] Table 9

[0229] In some embodiments, according to a pre-defined modulation and coding scheme table, a modulation and coding scheme reporting is implemented by using a segmentation indication method. The pre-defined modulation and coding scheme table includes at least one of an index / sequence number, a M value and / or a modulation mode, a coding mode and a code rate. Wherein, when the M value is set to a specific value, it represents a modulation mode other than OOK, such as BPSK. Wherein, the specific value is -1 or none or Nan or null. Wherein, the modulation mode includes at least one of OOK and / or BPSK and / or subcarrier modulation. Wherein, the subcarrier modulation related coefficient takes a value of a. Wherein, the coding mode includes at least one of convolutional code (CC) and / or Manchester code and / or Miller code and / or FM0 code.

[0230] In some embodiments, when the index / sequence number is less than a first threshold, it represents that an OOK waveform based on OFDM is used for transmission; and / or when the index / sequence number is not less than the first threshold, it represents that an OOK waveform based on DFT-s-OFDM is used for transmission. In some embodiments, when the index / sequence number is less than the first threshold, the M value is not greater than a second threshold; and / or when the index / sequence number is not less than the first threshold, the M value is not less than the second threshold. Wherein, the first threshold is not less than 0 and not greater than 1 / 4 of the total number of index / sequence numbers. Wherein, the second threshold is not less than 1 and not greater than 8. In some embodiments, when the index / sequence number is less than a third threshold, the M value is not greater than a fourth threshold; and / or when the index / sequence number is not less than the third threshold, the M value is not less than the fourth threshold. Wherein, the third threshold is not less than 1 / 4 of the total number of index / sequence numbers and not greater than the total number of index / sequence numbers minus 1. Wherein, the fourth threshold is not less than 8 and not greater than 24.

[0231] In some embodiments, the pre-defined modulation and coding scheme table includes one or more tables. The control information configuration indicates a table index. In some embodiments, according to the modulation mode or the table index, the applied modulation and coding scheme table is determined. In some embodiments, according to the index indicated by the control information, the modulation and coding scheme is determined.

[0232] Example 1, sequence number 0 corresponds to M value less than 16, sequence number 1 corresponds to M value 16, sequence number 2 corresponds to M value 24, sequence number 3 corresponds to M value 32. Sequence number 0~3 corresponds to Manchester code, code rate is 1 / 2. The pre-defined modulation and coding scheme table is shown in Table 10.

[0233] Table 10

[0234] Example 2, sequence number 0 corresponds to M value less than X, sequence number 1 corresponds to M value, for example, X is 16. The pre-defined modulation and coding scheme table is shown in Table 11.

[0235] Table 11

[0236] In some embodiments, the pre-defined modulation and coding scheme table includes convolutional code (CC), BPSK modulation and / or OOK modulation mode.

[0237] Example 3, the pre-defined modulation and coding scheme table includes E entries. Sequence number 0 to E0 corresponds to BPSK modulation, sequence number E0+1 to E-1 corresponds to BPSK modulation. Wherein, R1 is not less than R0. The pre-defined modulation and coding scheme table is shown in Table 12.

[0238] Table 12

[0239] In some embodiments, R0 is not less than the mother code rate of CC.

[0240] In the above examples, the CC code can be replaced by Manchester or FM0 or Miller code with similar effects.

[0241] In some embodiments, the pre-defined modulation and coding scheme table further includes convolutional code (CC), Manchester code, BPSK modulation and / or OOK modulation mode.

[0242] Example 4, the pre-defined modulation and coding scheme table includes E entries. Sequence number 0 to E0 corresponds to OOK modulation and CC and Manchester joint encoding mode, sequence number E0+1 to E1 corresponds to OOK modulation and CC and Manchester joint encoding mode, sequence number E1+1 to E corresponds to BPSK modulation and CC encoding mode. Wherein, R2 is not greater than R3. Wherein, E0 is not greater than E / 2. Wherein, E1 is not less than E / 4. The pre-defined modulation and coding scheme table is shown in Table 13.

[0243] Table 13

[0244] In some embodiments, R2 = R0*1 / 2, R3 = R1*1 / 2. In some embodiments, R0, R1, R2 and R3 are at least one of 1 / 12, 1 / 8, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2.

[0245] In some embodiments, the predefined modulation and coding scheme table further comprises convolutional code (CC) and BPSK modulation.

[0246] Example 5, the predefined modulation and coding scheme table comprises E entries. Sequence number 0 to E corresponds to BPSK modulation. The predefined modulation and coding scheme table is shown in Table 14.

[0247] Table 14

[0248] In some embodiments, the predefined modulation and coding scheme table further comprises convolutional code (CC), Manchester code and BPSK modulation.

[0249] Example 6, the predefined modulation and coding scheme table comprises E entries. Sequence number 0 to E3 corresponds to BPSK modulation and CC encoding mode, sequence number E3+1 to E corresponds to BPSK modulation and CC and Manchester joint encoding mode. Wherein, R2 is not greater than R3. Wherein, E3 is not less than E / 2. The predefined modulation and coding scheme table is shown in Table 15.

[0250] Table 15

[0251] R0 and R1 refer to the boundary values of code rate, and many code rates are included in between.

[0252] In the above examples, Manchester code can be replaced by FM0 or Miller code with similar effects.

[0253] In the above examples, CC code can be replaced by PIE or FM0 or Miller code with similar effects.

[0254] In some embodiments, a stable link performance is obtained according to the M value and the selection of the frequency domain transmission resource. When the M value is not less than a first threshold value, the corresponding frequency domain transmission resource (such as the number of physical resource blocks or the frequency domain width) is not less than a first value. When the M value is not greater than the first threshold value, the corresponding frequency domain transmission resource (such as the number of physical resource blocks or the frequency domain width) is not less than a second value. The first threshold value is an integer not greater than 12. The first value is 3 PRBs or 540 kHz. The second value is 1 PRB or 180 kHz.

[0255] In an embodiment, FIG. 19 is a structural block diagram of a signal transmission apparatus provided by the embodiments of the present application, applied to a first communication device. As shown in FIG. 19, the signal transmission apparatus in the embodiment includes a first determination module 1610 and a transmission module 1620. The first determination module 1610 is configured to determine a minimum resource scheduling time unit according to transmission configuration information. The transmission module 1620 is configured to perform signal transmission according to the minimum resource scheduling time unit.

[0256] In an embodiment, the transmission configuration information includes at least one of a subcarrier spacing SCS, a length of one OFDM symbol, a number of samples corresponding to one OFDM symbol, and a number M of chips / modulation symbols in one OFDM symbol.

[0257] In an embodiment, the minimum resource scheduling time unit includes at least one of a length of one chip / modulation symbol, a length of one OFDM symbol, a length of o OFDM symbols, a length of one slot, and a length of one subframe. o is an integer in the interval of 1 to 14.

[0258] In an embodiment, the minimum resource scheduling time unit is related to the length of a chip / modulation symbol for uplink transmission, or the minimum resource scheduling time unit is a positive multiple of the length of a chip / modulation symbol for uplink transmission. In the process of downlink transmission, the length of each chip / modulation symbol is fixed and equal.

[0259] In an embodiment, the minimum resource scheduling time unit for downlink transmission is determined according to the number M of chips / modulation symbols contained in one OFDM symbol.

[0260] In an embodiment, one OFDM symbol or one downlink transmission includes a first chip / modulation symbol and a second chip / modulation symbol, or one OFDM symbol or one downlink transmission includes a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol.

[0261] In an embodiment, one OFDM symbol comprises a first chip / modulation symbol and a second chip / modulation symbol; the quantity relationship between the first chip / modulation symbol and the second chip / modulation symbol comprises: the quantity of the first chip / modulation symbol is M-1, and the quantity of the second chip / modulation symbol is 1; or, the quantity of the first chip / modulation symbol is M-n, and the quantity of the second chip / modulation symbol is n, wherein n is determined according to at least one of the value of M, the length of one OFDM symbol, or the number of samples corresponding to one OFDM symbol.

[0262] In an embodiment, one OFDM symbol comprises a first chip / modulation symbol and a second chip / modulation symbol; the determination of the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol comprises at least one of: determining the number of samples corresponding to the first chip / modulation symbol according to the down-rounding value of the ratio of the number of samples corresponding to one OFDM symbol / sampling rate / link rate to the quantity of chip / modulation symbols comprised in one OFDM symbol, and determining the number of samples corresponding to the second chip / modulation symbol according to the up-rounding value of the ratio of the number of samples corresponding to one OFDM symbol / sampling rate / link rate to the quantity of chip / modulation symbols comprised in one OFDM symbol; or, determining the number of samples corresponding to the first chip / modulation symbol according to the down-rounding value of the quantity of chip / modulation symbols comprised in one OFDM symbol, and determining the number of samples corresponding to the second chip / modulation symbol according to the remaining number of samples; or, determining the number of samples corresponding to the first chip / modulation symbol according to the down-rounding value of the quantity of chip / modulation symbols comprised in one OFDM symbol and an offset value, and determining the number of samples corresponding to the second chip / modulation symbol according to the remaining number of samples; or, determining the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol according to the quantity of chip / modulation symbols comprised in one OFDM symbol; the determination of the length of the first chip / modulation symbol and the length of the second chip / modulation symbol comprises at least one of: determining the length of the first chip / modulation symbol according to the length of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the first chip / modulation symbol, and determining the length of the second chip / modulation symbol according to the length of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the second chip / modulation symbol; or, the length of the second chip / modulation symbol is the sum of the length of the first chip / modulation symbol and the length of a cyclic prefix (CP).

[0263] In an embodiment, one OFDM symbol includes a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol; a time duration relationship of the first chip / modulation symbol, the second chip / modulation symbol, and the third chip / modulation symbol includes at least one of the following: a time duration of the third chip / modulation symbol is a sum of a time duration of the first chip / modulation symbol and a time duration of a cyclic prefix (CP), or a time duration of the third chip / modulation symbol is a sum of a time duration of the second chip / modulation symbol and a time duration of the CP.

[0264] In an embodiment, one OFDM symbol includes a fourth chip / modulation symbol; a time duration of the fourth chip / modulation symbol includes one of the following: twice a time duration of the first chip / modulation symbol, a sum of the time duration of the first chip / modulation symbol and half of a time duration of a CP, twice a time duration of the second chip / modulation symbol, a sum of the time duration of the second chip / modulation symbol and half of the time duration of the CP, a sum of the time duration of the first chip / modulation symbol and the time duration of the second chip / modulation symbol, a sum of the time duration of the first chip / modulation symbol and the time duration of the CP, a difference from the time duration of the second chip / modulation symbol, a sum of the time duration of the second chip / modulation symbol and the time duration of the CP, and a difference from the time duration of the first chip / modulation symbol, the time duration of the CP; a number of samples corresponding to the time duration of the fourth chip / modulation symbol includes one of the following: twice a number of samples corresponding to the time duration of the first chip / modulation symbol, a sum of the number of samples corresponding to the time duration of the first chip / modulation symbol and half of a number of samples corresponding to the time duration of the CP, twice a number of samples corresponding to the time duration of the second chip / modulation symbol, a sum of the number of samples corresponding to the time duration of the second chip / modulation symbol and half of the number of samples corresponding to the time duration of the CP, a sum of the number of samples corresponding to the time duration of the first chip / modulation symbol and the number of samples corresponding to the time duration of the second chip / modulation symbol, a sum of the number of samples corresponding to the time duration of the first chip / modulation symbol and the number of samples corresponding to the time duration of the CP, a difference from the number of samples corresponding to the time duration of the second chip / modulation symbol, a sum of the number of samples corresponding to the time duration of the second chip / modulation symbol and the number of samples corresponding to the time duration of the CP, and a difference from the number of samples corresponding to the time duration of the first chip / modulation symbol, the number of samples corresponding to the time duration of the CP.

[0265] In an embodiment, one OFDM symbol comprises a fifth chip / modulation symbol; the fifth chip / modulation symbol duration is determined by one of the following: the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, and the first chip / modulation symbol duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and half of the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the second chip / modulation symbol duration; the number of samples corresponding to the fifth chip / modulation symbol duration is determined by one of the following: the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, and the number of samples corresponding to the first chip / modulation symbol; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and half of the number of samples corresponding to the CP duration; the absolute value of the difference between the first chip / modulation symbol quantity and the second chip / modulation symbol quantity, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the second chip / modulation symbol; wherein the quantity of other chip / modulation symbols is the difference between the quantity of chip / modulation symbols corresponding to one OFDM symbol and the number of check chips; and the duration of other chip / modulation symbols is the product of the number of check chips and the fifth chip / modulation symbol duration.

[0266] In an embodiment, the first number of chips / modulation symbols is twice the second number of chips / modulation symbols; one OFDM symbol contains the fifth number of chips / modulation symbols; the number of samples corresponding to the duration of the fifth number of chips / modulation symbols comprises one of: the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the first number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the second number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and half of the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and half of the number of CPs determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the first number of chips / modulation symbols, and the number of samples corresponding to the first number of chips / modulation symbols determined; the number of samples corresponding to one OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first number of chips / modulation symbols and the number of samples corresponding to the second number of chips / modulation symbols, the number of samples corresponding to the second number of chips / modulation symbols, and the number of samples corresponding to the second number of chips / modulation symbols determined; wherein the number of other chips / modulation symbols is at least one of the first number of chips / modulation symbols, the second number of chips / modulation symbols, the fifth number of chips / modulation symbols, or the difference between the number of samples corresponding to one OFDM symbol and the number of parity chips; and the duration of the other chips / modulation symbols is at least one of the duration of the first number of chips / modulation symbols, the duration of the second number of chips / modulation symbols, the duration of the fifth number of chips / modulation symbols, or the product of the number of parity chips and the duration of the fifth number of chips / modulation symbols.

[0267] In an embodiment, the minimum resource scheduling time unit is aligned with a one OFDM symbol boundary including a cyclic prefix, including one of: a start position of a first chip / modulation symbol is consistent with a start position of a one OFDM symbol including a cyclic prefix; a start position of a first chip / modulation symbol is consistent with a start position of a OFDM symbol excluding a cyclic prefix; an end position of an mthchip / modulation symbol in the minimum resource scheduling time unit is aligned with an end position of a one OFDM symbol.

[0268] In an embodiment, every n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 0.5ms or 7*n one OFDM symbol including a cyclic prefix; wherein n is an integer greater than or equal to 1; C is a chip number corresponding to a one OFDM symbol minus 1 or plus 1.

[0269] In an embodiment, every n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 1ms or 14*n one OFDM symbol including a cyclic prefix; wherein n is an integer greater than or equal to 1; C is a chip number corresponding to a one OFDM symbol minus 1 or plus 1.

[0270] In an embodiment, a time margin is appended after every n*C or n*C+1 or n*(C+1) chip / modulation symbol to align with at least one of a one OFDM symbol including a cyclic prefix, a one OFDM symbol excluding a cyclic prefix, a half of a slot boundary, a slot boundary or a subframe boundary.

[0271] In an embodiment, a time transmission pattern of a signal transmission includes: a downlink timing, an uplink timing and a guard interval; the guard interval includes: a downlink guard interval and an uplink guard interval.

[0272] In an embodiment, the downlink guard interval is located between the downlink timing and the uplink timing, and the downlink transmission is in front and the uplink transmission is in back; the uplink guard interval is located between the uplink timing and the downlink timing, and the uplink transmission is in front and the downlink transmission is in back.

[0273] In an embodiment, a duration of the downlink guard interval is related to at least one of a downlink transmission duration, a chip / modulation symbol number included in a one OFDM symbol, a subcarrier spacing, a coding code rate and a data rate; a duration of the uplink guard interval is related to at least one of an uplink transmission duration, a transmission frequency bandwidth, a coding code rate, a backscattering link frequency, a subcarrier / tone frequency and a data rate.

[0274] In an embodiment, for downlink transmission, if the number of chips / modulation symbols contained in one OFDM symbol is not a power of 2, a GAP time is added at every interval T; for uplink transmission, a GAP time is added after a fixed number of chips / modulation symbols.

[0275] In an embodiment, if the number of chips / modulation symbols contained in one OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in one OFDM symbol contains check chips of a second value.

[0276] In an embodiment, the position of the check chips of the second value includes one of the following: a position at the end of the number of chips / modulation symbols contained in one OFDM symbol; a position at the beginning of the number of chips / modulation symbols contained in one OFDM symbol; at least one check chip is at the beginning of the number of chips / modulation symbols contained in one OFDM symbol, and at least one check chip is at the end of the number of chips / modulation symbols contained in one OFDM symbol.

[0277] In an embodiment, transmission starts from the third value of chips / modulation symbols in the first OFDM symbol; wherein the third value is an even number.

[0278] In an embodiment, the signal transmission device further comprises a strategy transmission module configured to configure or report the modulation and coding strategy in a segmented indication manner.

[0279] In an embodiment, the modulation and coding strategy includes one of the following: an index / sequence number, a number of samples corresponding to one OFDM symbol and / or a modulation mode, a coding mode and a code rate.

[0280] The signal transmission device provided by the embodiments of the present application can perform the signal transmission method for the first communication device provided by any of the embodiments of the present application, and has the corresponding function modules and effects of the execution method.

[0281] In an embodiment, FIG. 20 is a structural block diagram of another signal transmission device provided by the embodiments of the present application, applied to a second communication device. As shown in FIG. 20, the signal transmission device in the present embodiment comprises a receiving module 1710 and a second determination module 1720. The receiving module 1710 is configured to receive control signaling sent by a first communication device; and the second determination module 1720 is configured to determine a minimum resource scheduling time unit according to the control signaling.

[0282] In an embodiment, the control signaling indicates one of the following: a scaling factor index; a scaling factor value; a modulation scheme.

[0283] In an embodiment, the minimum resource scheduling time unit is a positive multiple of the chip / modulation symbol length of the uplink transmission; the minimum resource scheduling time unit is determined according to the control signaling, including one of the following: the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to the scaling factor index and the candidate minimum resource scheduling unit duration; the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to the scaling factor value and the reference minimum resource scheduling unit duration; the minimum resource scheduling unit or the chip / modulation symbol length of the uplink transmission is determined according to at least one of the modulation scheme, the single subcarrier spacing size and the scaling factor value.

[0284] In an embodiment, the control signaling indicates at least one of the following: the uplink transmission bandwidth information; the number of tones occupied by the uplink transmission; the number of resource elements; the uplink subcarrier / ton modulation related information; the information related to the relationship between the number of subcarriers / tons and the coded modulation symbols; the uplink coding rate information; the uplink data rate information; the downlink transmission rate information; the chip length in the downlink transmission; the minimum resource allocation unit duration in the downlink transmission.

[0285] In an embodiment, the minimum resource scheduling time unit is determined according to the control signaling, including one of the following: the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to the uplink transmission bandwidth information; the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to at least one of the chip length in the downlink transmission and the uplink subcarrier / ton modulation related information; the minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to at least one of the uplink transmission bandwidth information, the number of tones occupied by the uplink transmission, the uplink coding rate information and the uplink subcarrier / ton modulation related information.

[0286] In an embodiment, the time transmission mode of the control signaling includes: the downlink timing, the uplink timing and the guard interval; the guard interval includes: the downlink guard interval and the uplink guard interval.

[0287] In an embodiment, if the number of chips / modulation symbols contained in one OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in one OFDM symbol contains a check chip of a second value.

[0288] In an embodiment, the signal transmission device further includes:

[0289] The signal transmission module is configured to configure or report the modulation and coding in a segmented indication manner.

[0290] The signal transmission device provided in the embodiments of the present application can perform the signal transmission method for the second communication device provided in any of the embodiments of the present application, and has the corresponding function modules and effects of the execution method.

[0291] In an embodiment, FIG. 21 is a structural schematic diagram of a communication device provided by the embodiments of the present application. As shown in FIG. 21, the device provided by the embodiments of the present application includes a processor 1810, a memory 1820 and a communication module 1830. The number of processors 1810 in the device can be one or more, and FIG. 21 takes one processor 1810 as an example. The number of memories 1820 in the device can be one or more, and FIG. 21 takes one memory 1820 as an example. The processor 1810, the memory 1820 and the communication module 1830 of the device can be connected through a bus or other means, and FIG. 21 takes the connection through the bus as an example. In this embodiment, the device can be the first communication device or the second communication device.

[0292] The memory 1820 as a computer readable storage medium can be configured to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the device of any embodiment of the present application (for example, the first determination module 1610 and the transmission module 1620 of the first communication device, and the receiving module 1710 and the second determination module 1710 of the second communication device). The memory 1820 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required by a function; the data storage area can store data created according to the use of the device, etc. In addition, the memory 1820 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device or other non-volatile solid-state memory device. In some examples, the memory 1820 can further include a memory remotely arranged with respect to the processor 1810, which can be connected to the device through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof. The communication module 1830 is used for data interaction between multiple communication devices.

[0293] The above-mentioned communication device can be configured to execute the data transmission method provided by any of the above-mentioned embodiments, and has corresponding functions and effects.

[0294] The embodiments of the present application also provide a storage medium containing computer executable instructions, which are used to execute a signal transmission method applied to a first communication device when executed by a computer processor. The method includes: determining a minimum resource scheduling time unit according to transmission configuration information; and performing signal transmission according to the minimum resource scheduling time unit. The computer executable instructions are also used to execute a signal transmission method applied to a second communication device when executed by a computer processor. The method includes: receiving control signaling sent by the first communication device; and determining a minimum resource scheduling time unit according to the control signaling.

[0295] In an embodiment, the embodiments of the present application further include a computer program product, which comprises a computer program, wherein the computer program, when executed by a processor, implements the data transmission method of any of the embodiments of the present application.

[0296] In the implementation of the computer program product, computer program codes for performing the operations of the present application can be written in one or more programming languages or combinations thereof, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as "C" language or similar programming languages. The program codes can be executed entirely on a user computer, partially on a user computer, as an independent software package, partially on a user computer and partially on a remote computer, or entirely on a remote computer or server. In the case involving a remote computer, the remote computer can be connected to the user computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, through the Internet using an Internet service provider).

[0297] Those skilled in the art will appreciate that the term user equipment encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing apparatus, a portable web browser, or a vehicle-mounted mobile station.

[0298] Generally, the various embodiments of the present application can be implemented in hardware or special-purpose circuits, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software which can be executed by a controller, microprocessor or other computing device, although the present application is not limited thereto.

[0299] Embodiments of the present application can be implemented by a data processor of a mobile device executing computer program instructions, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.

[0300] The block diagrams of any logical flow of the present application in the accompanying drawings can represent program operations, or can represent interconnections of logical circuits, modules and functions, or can represent a combination of program operations and logical circuits, modules and functions. The computer program can be stored on a memory. The memory can have any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (ROM), random access memory (RAM), optical storage devices and systems (digital video disc (DVD) or compact disc (CD)), and the like. The computer readable media can include non-transitory storage media. The data processor can be of any type suitable for the local technical environment, and can include, for example but not limited to, general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures, as examples.

[0301] The above only is the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A signal transmission method applied to a first communication device, comprising: determining a minimum resource scheduling time unit according to transmission configuration information; and transmitting a signal according to the minimum resource scheduling time unit.

2. The method of claim 1, wherein, The transmission configuration information comprises at least one of a subcarrier spacing (SCS), a length of one orthogonal frequency division multiplexing (OFDM) symbol, a number of samples corresponding to one OFDM symbol, and a number of chips / modulation symbols in one OFDM symbol (M).

3. The method of claim 1, wherein, The minimum resource scheduling time unit comprises at least one of a length of one chip / modulation symbol, a length of one OFDM symbol, a length of o OFDM symbols, a length of one slot, and a length of one subframe, wherein o is an integer in a range from 1 to 14. The minimum resource scheduling time unit is related to a length of a chip / modulation symbol for uplink transmission, or the minimum resource scheduling time unit is a positive multiple of the length of the chip / modulation symbol for uplink transmission, wherein the length of each chip / modulation symbol is fixed and equal in a downlink transmission process.

4. The method of claim 1, wherein, A minimum resource scheduling time unit for downlink transmission is determined according to the number of chips / modulation symbols (M) contained in one OFDM symbol.

5. The method of claim 1, wherein, One OFDM symbol or one downlink transmission comprises a first chip / modulation symbol and a second chip / modulation symbol, or 6. The method of claim 1, wherein, One OFDM symbol or one downlink transmission comprises a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol. One OFDM symbol contains a first chip / modulation symbol and a second chip / modulation symbol.

7. The method of claim 2, 5, or 6, wherein, The number relationship between the first chip / modulation symbol and the second chip / modulation symbol comprises: The number of the first chip / modulation symbol is M-1, and the number of the second chip / modulation symbol is 1, or The number of the first chip / modulation symbol is M-n, and the number of the second chip / modulation symbol is n, wherein n is determined according to at least one of a value of M, a length of one OFDM symbol, or a number of samples corresponding to one OFDM symbol. One OFDM symbol contains a first chip / modulation symbol and a second chip / modulation symbol.

8. The method of claim 2, 5, or 6, wherein, The determination manner of the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol comprises at least one of the following: The number of samples corresponding to the first chip / modulation symbol is determined according to a down-round value of a ratio of a number of samples corresponding to one OFDM symbol / sampling rate / link rate to a number of chips / modulation symbols contained in one OFDM symbol, and the number of samples corresponding to the second chip / modulation symbol is determined according to an up-round value of the ratio, or The number of samples corresponding to the first chip / modulation symbol is determined according to a down-round value of a ratio of a number of samples corresponding to one OFDM symbol / sampling rate / link rate to a number of chips / modulation symbols contained in one OFDM symbol, and the number of samples corresponding to the second chip / modulation symbol is determined according to a remaining number of samples, or The number of samples corresponding to the first chip / modulation symbol is determined according to a down-round value of a ratio of a number of samples corresponding to one OFDM symbol / sampling rate / link rate to a number of chips / modulation symbols contained in one OFDM symbol, and the number of samples corresponding to the second chip / modulation symbol is determined according to a remaining number of samples, or ​ ​ The first chip / modulation symbol corresponds to a number of samples determined according to a number of chips / modulation symbols contained in one OFDM symbol, a down-round value of the number of chips / modulation symbols contained in one OFDM symbol, and an offset value, and the second chip / modulation symbol corresponds to a number of remaining samples; Or, The first chip / modulation symbol corresponds to a number of samples determined according to a number of chips / modulation symbols contained in one OFDM symbol, and the second chip / modulation symbol corresponds to a number of samples determined according to a number of chips / modulation symbols contained in one OFDM symbol; The first chip / modulation symbol duration and the second chip / modulation symbol duration are determined in at least one of the following manners: The first chip / modulation symbol duration is determined according to a duration of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the first chip / modulation symbol, and the second chip / modulation symbol duration is determined according to a duration of one OFDM symbol / sampling rate / link rate and the number of samples corresponding to the second chip / modulation symbol; or The second chip / modulation symbol duration is a sum of the first chip / modulation symbol duration and a cyclic prefix (CP) duration.

9. The method of claim 2, 5, or 6, wherein, One OFDM symbol contains a first chip / modulation symbol, a second chip / modulation symbol, and a third chip / modulation symbol; and a time duration relationship among the first chip / modulation symbol, the second chip / modulation symbol, and the third chip / modulation symbol includes at least one of the following: The third chip / modulation symbol duration is a sum of the first chip / modulation symbol duration and a cyclic prefix (CP) duration, or the third chip / modulation symbol duration is a sum of the second chip / modulation symbol duration and a CP duration.

10. The method of claim 2, 5, or 6, wherein, One OFDM symbol contains a fourth chip / modulation symbol; The fourth chip / modulation symbol duration includes one of the following: twice the first chip / modulation symbol duration, a sum of the first chip / modulation symbol duration and half of a CP duration, twice the second chip / modulation symbol duration, a sum of the second chip / modulation symbol duration and half of a CP duration, a sum of the first chip / modulation symbol duration and the second chip / modulation symbol duration, a sum of the first chip / modulation symbol duration and a CP duration, a difference between the second chip / modulation symbol duration and the first chip / modulation symbol duration, a sum of the second chip / modulation symbol duration and a CP duration, a difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, and a CP duration. The sample number corresponding to the fourth chip / modulation symbol duration comprises one of the following: twice the sample number corresponding to the first chip / modulation symbol duration, the sum of the sample number corresponding to the first chip / modulation symbol duration and half the sample number corresponding to the CP duration, twice the sample number corresponding to the second chip / modulation symbol duration, the sum of the sample number corresponding to the second chip / modulation symbol duration and half the sample number corresponding to the CP duration, the sum of the sample number corresponding to the first chip / modulation symbol duration and the sample number corresponding to the second chip / modulation symbol duration, the sum of the sample number corresponding to the first chip / modulation symbol duration and the sample number corresponding to the CP duration, the difference from the sample number corresponding to the second chip / modulation symbol duration, the sum of the sample number corresponding to the second chip / modulation symbol duration and the sample number corresponding to the CP duration, the difference from the sample number corresponding to the first chip / modulation symbol duration, and the sample number corresponding to the CP duration.

11. The method of claim 2, 5, or 6, wherein, One OFDM symbol comprises a fifth chip / modulation symbol; The fifth chip / modulation symbol duration comprises one of the following: The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, and the first chip / modulation symbol duration are determined; The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the CP duration are determined; The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and half the CP duration are determined; The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the first chip / modulation symbol duration and the second chip / modulation symbol duration, the first chip / modulation symbol duration, and the second chip / modulation symbol duration are determined; The sample number corresponding to the fifth chip / modulation symbol duration comprises one of the following: The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the sample number corresponding to the first chip / modulation symbol and the sample number corresponding to the second chip / modulation symbol, and the sample number corresponding to the first chip / modulation symbol are determined; The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the sample number corresponding to the first chip / modulation symbol and the sample number corresponding to the second chip / modulation symbol, the sample number corresponding to the first chip / modulation symbol, and the sample number corresponding to the CP duration are determined; The absolute value of the difference between the first chip / modulation symbol number and the second chip / modulation symbol number, the absolute value of the difference between the sample number corresponding to the first chip / modulation symbol and the sample number corresponding to the second chip / modulation symbol, the sample number corresponding to the first chip / modulation symbol, and half the sample number corresponding to the CP duration are determined; The absolute value of the difference between the number of the first chip / modulation symbol and the number of the second chip / modulation symbol, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the second chip / modulation symbol are determined. The number of other chips / modulation symbols is the difference between the number of chips / modulation symbols corresponding to one OFDM symbol and the number of check chips; the duration of the other chips / modulation symbols is the product of the number of check chips and the duration of the fifth chip / modulation symbol.

12. The method of claim 2, 5, or 6, wherein, The number of the first chip / modulation symbol is twice the number of the second chip / modulation symbol; one OFDM symbol contains a fifth chip / modulation symbol. The number of samples corresponding to the duration of the fifth chip / modulation symbol includes one of the following: The number of samples corresponding to an OFDM symbol is determined by the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, and the number of samples corresponding to the first chip / modulation symbol. The number of samples corresponding to an OFDM symbol is determined by the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, and the number of samples corresponding to the second chip / modulation symbol. The number of samples corresponding to an OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of CPs are determined. The number of samples corresponding to an OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the second chip / modulation symbol, and the number of CPs are determined. The number of samples corresponding to an OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and half of the number of CPs are determined. The number of samples corresponding to an OFDM symbol is determined by the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the second chip / modulation symbol, and half of the number of CPs. The number of samples corresponding to an OFDM symbol, the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the first chip / modulation symbol, and the number of samples corresponding to the first chip / modulation symbol are determined. The number of samples corresponding to an OFDM symbol is determined by the absolute value of the difference between the number of samples corresponding to the first chip / modulation symbol and the number of samples corresponding to the second chip / modulation symbol, the number of samples corresponding to the second chip / modulation symbol, and the number of samples corresponding to the second chip / modulation symbol. The other chip / modulation symbol quantity is at least one of the first chip / modulation symbol quantity, the second chip / modulation symbol quantity, the fifth chip / modulation symbol quantity, or the difference between the sample number corresponding to one OFDM symbol and the number of check chips; the duration of the other chip / modulation symbol is at least one of the first chip / modulation symbol duration, the second chip / modulation symbol duration, the fifth chip / modulation symbol duration, or the product of the number of check chips and the fifth chip / modulation symbol duration.

13. The method of claim 1, wherein, The minimum resource scheduling time unit is aligned with one OFDM symbol boundary containing a cyclic prefix, including one of the following: The starting position of the first chip / modulation symbol is consistent with the starting position of one OFDM symbol containing a cyclic prefix; The starting position of the first chip / modulation symbol is consistent with the starting position of an OFDM symbol excluding a cyclic prefix; The ending position of the mth chip / modulation symbol in the minimum resource scheduling time unit is aligned with the ending position of one OFDM symbol.

14. The method of claim 3, wherein, Every n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 0.5ms or 7*n OFDM symbols containing a cyclic prefix; wherein n is an integer greater than or equal to 1; C is the number of chips corresponding to one OFDM symbol minus one or plus one.

15. The method of claim 3, wherein, Every n*C or n*C+1 or n*(C+1) chip / modulation symbol duration is aligned with 1ms or 14*n OFDM symbols containing a cyclic prefix; wherein n is an integer greater than or equal to 1; C is the number of chips corresponding to one OFDM symbol minus one or plus one.

16. The method of claim 2 or 3, wherein, A time margin is supplemented after every n*C or n*C+1 or n*(C+1) chip / modulation symbol to align with at least one of the following: an OFDM symbol containing a cyclic prefix, an OFDM symbol not containing a cyclic prefix, a half of a slot boundary, a slot boundary, or a subframe boundary.

17. The method of claim 1, wherein, The time transmission mode of the signal transmission includes: a downlink timing, an uplink timing, and a guard interval; the guard interval includes: a downlink guard interval and an uplink guard interval.

18. The method of claim 17, wherein, The downlink guard interval is located between the downlink timing and the uplink timing, and the downlink transmission is in front, and the uplink transmission is in back; The uplink guard interval is located between the uplink timing and the downlink timing, and the uplink transmission is in front, and the downlink transmission is in back.

19. The method of claim 17, wherein, The duration of the downlink guard interval is related to at least one of the following: the downlink transmission duration, the number of chips / modulation symbols contained in one OFDM symbol, the subcarrier spacing, the coding code rate, and the data rate; The duration of the uplink guard interval is related to at least one of the following: the uplink transmission duration, the transmission frequency bandwidth, the coding code rate, the backscattering link frequency, the subcarrier / square wave frequency, and the data rate.

20. The method of claim 17, wherein, For downlink transmission, a GAP time is added at every interval T time when the number of chips / modulation symbols contained in one OFDM symbol is not a power of 2. For uplink transmission, a GAP time is added after a fixed number of chips / modulation symbols.

21. The method of claim 2, wherein, When the number of chips / modulation symbols contained in one OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in one OFDM symbol contains a second value of check chips.

22. The method of claim 21, wherein, The position of the second value of check chips includes one of the following: a position at the end of the number of chips / modulation symbols contained in one OFDM symbol; a position at the beginning of the number of chips / modulation symbols contained in one OFDM symbol; at least one check chip is located at the beginning of the number of chips / modulation symbols contained in one OFDM symbol, and at least one check chip is located at the end of the number of chips / modulation symbols contained in one OFDM symbol.

23. The method of claim 21, wherein, The transmission starts from the third value of chips / modulation symbols in the first OFDM symbol; wherein the third value is an even number.

24. The method of claim 1, further comprising: configuring or reporting the modulation and coding strategy in a segmented indication manner.

25. The method of claim 24, wherein, The modulation and coding strategy includes one of the following: index / sequence number, the number of samples corresponding to one OFDM symbol and / or modulation method, coding method and code rate.

26. A signal transmission method applied to a second communication device, comprising: receiving control signaling sent by a first communication device; determining a minimum resource scheduling time unit according to the control signaling.

27. The method of claim 26, wherein, The control signaling indicates one of the following: a scaling factor index; a scaling factor value; a modulation scheme.

28. The method of claim 27, wherein, The minimum resource scheduling time unit is a positive multiple of the length of a chip / modulation symbol for uplink transmission; and the determination of the minimum resource scheduling time unit according to the control signaling comprises one of the following: determining the minimum resource scheduling time unit or the length of a chip / modulation symbol for uplink transmission according to the scaling factor index and a candidate minimum resource scheduling unit duration; determining the minimum resource scheduling time unit or the length of a chip / modulation symbol for uplink transmission according to the scaling factor value and a reference minimum resource scheduling unit duration; determining the minimum resource scheduling unit or the length of a chip / modulation symbol for uplink transmission according to at least one of the modulation scheme, a single subcarrier spacing size and the scaling factor value.

29. The method of claim 26, wherein, The control signaling indicates at least one of the following: uplink transmission bandwidth information; the number of tones occupied by uplink transmission; the number of resource particles; uplink subcarrier / rectangular wave modulation related information; information related to the relationship between the number of subcarriers / rectangular waves and the coding modulation symbol; uplink coding rate information; uplink data rate information; downlink transmission rate information; chip length in downlink transmission; minimum resource allocation unit duration in downlink transmission.

30. The method of claim 29, wherein, The determination of the minimum resource scheduling time unit according to the control signaling comprises one of the following: determining the minimum resource scheduling time unit or the length of a chip / modulation symbol for uplink transmission according to the uplink transmission bandwidth information; determining the minimum resource scheduling time unit or the length of a chip / modulation symbol for uplink transmission according to at least one of the chip length in downlink transmission and the uplink subcarrier / rectangular wave modulation related information; The minimum resource scheduling time unit or the chip / modulation symbol length of the uplink transmission is determined according to at least one of the uplink transmission bandwidth information, the number of tones occupied by the uplink transmission, the uplink coding rate information, and uplink subcarrier / orthogonal frequency division modulation related information.

31. The method of claim 26, wherein, The time transmission mode of the control signaling comprises: downlink timing, uplink timing, and guard intervals; the guard intervals comprise: downlink guard intervals and uplink guard intervals.

32. The method of claim 26, wherein, When the number of chips / modulation symbols contained in one OFDM symbol is greater than or equal to a first value, the number of chips / modulation symbols contained in one OFDM symbol contains check chips of a second value.

33. The method of claim 26, further comprising: configuring or reporting the modulation and coding in a segmented indication manner.

34. A communication device comprising: a memory, and at least one processor; the memory is configured to store at least one program; when the at least one program is executed by the at least one processor, the at least one processor implements the signal transmission method as claimed in any one of claims 1-25 or 26-33.

35. A storage medium, wherein, The storage medium stores a computer program, and the computer program is executed by a processor to implement the signal transmission method as claimed in any one of claims 1-25 or 26-33.

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