Communication method and apparatus

Abstract

The present application relates to the technical field of communications, and in particular to a communication method and apparatus. The present application supports a NearLink standard, an IEEE 802.11 series standard, and so on. In the present application, lengths of CP-OFDM symbols and lengths of CPs at different SCSs are designed. In this way, CP-OFDM symbols at different SCSs in NearLink technology can be obtained by decreasing a crystal oscillator frequency or increasing a crystal oscillator frequency, and CP-OFDM symbols at different SCSs in both NearLink technology and NR technology can also be obtained by decreasing a crystal oscillator frequency or increasing a crystal oscillator frequency, thereby realizing the compatibility of frame structures.

Description

Communication methods and devices

[0001] This application claims priority to Chinese Patent Application No. 202510123973.2, filed with the State Intellectual Property Office of China on January 24, 2025, entitled "Communication Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0003] Short-range wireless communication refers to communication between two wireless devices within a localized area, such as a home, office, laboratory, building, campus, workshop, or factory, typically within a distance of 10-20 meters. Short-range wireless communication allows users to maintain a communication connection while moving within a limited space. Over the past 30 years, short-range wireless communication has developed rapidly, resulting in a huge market. This technology is commonly used in scenarios without unified deployment, and its applications are quite diverse.

[0004] As a new generation of short-range communication technology, Starflash technology possesses characteristics such as low latency, high reliability, high synchronization accuracy, support for multiple concurrent connections, high information security, and low power consumption. The cyclic prefix (CP) is a key component in wireless communication technology used to overcome multipath effects and achieve orthogonal frequency division multiplexing (OFDM). The role of the CP is to prevent inter-symbol interference (ISI) and inter-carrier interference (ICI) so that signals can still be correctly decoded when arriving through different paths.

[0005] Therefore, the appropriate CP length to use in the star flash technology urgently needs to be determined. Summary of the Invention

[0006] This application provides a communication method and apparatus that utilizes the subcarrier spacing (SCS) and CP length provided in various embodiments of this application for communication, resulting in strong anti-interference capabilities. It is understood that the communication method and apparatus provided in this application can be applied to, but are not limited to, star-flash systems.

[0007] In a first aspect, embodiments of this application provide a communication method applied to a first device. The first device may be a wireless local area network (WLAN) device, or a device involved in a satellite imagery process, or it may be a chip, functional module, processing system, or communication component disposed within the aforementioned device. The method includes:

[0008] A cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbol is generated based on the first subcarrier spacing (SCS); the CP-OFDM symbol is transmitted; the first SCS and the CP-OFDM symbol satisfy at least one of the following:

[0009] The first SCS is 30KHz, the length of the CP in the CP-OFDM symbol is 80Ts, and the length of the CP-OFDM symbol is 1104Ts;

[0010] The first SCS is 60KHz, the length of the CP in the CP-OFDM symbol is 40Ts, and the length of the CP-OFDM symbol is 552Ts;

[0011] The first SCS is 60KHz, the CP length of the CP-OFDM symbol is 44Ts, and the length of the CP-OFDM symbol is 556Ts;

[0012] The first SCS is 120KHz, the CP length of the CP-OFDM symbol is 20Ts, and the length of the CP-OFDM symbol is 276Ts;

[0013] The first SCS is 120KHz, the CP length of the CP-OFDM symbol is 22Ts, and the length of the CP-OFDM symbol is 278Ts;

[0014] The first SCS is 240KHz, the length of the CP in the CP-OFDM symbol is 10Ts, and the length of the CP-OFDM symbol is 138Ts;

[0015] The first SCS is 240KHz, the CP length of the CP-OFDM symbol is 11Ts, and the length of the CP-OFDM symbol is 139Ts;

[0016] The first SCS is 480 kHz, the CP length of the CP-OFDM symbol is 5 Ts, and the length of the CP-OFDM symbol is 69 Ts; or,

[0017] The first SCS is 480KHz, the CP length of the CP-OFDM symbol is 5.5Ts, and the length of the CP-OFDM symbol is 69.5Ts.

[0018] Ts is the basic unit of time. The lengths shown here are examples using Ts as the unit. Based on the relationship between Ts and microseconds (μs), Ts shown in this application can also be replaced with μs. The length of a CP-OFDM symbol includes the length of the CP and the length of the valid data. Optionally, the length of the OFDM symbol can be used to represent the length of the valid data excluding the CP. Based on the relationship between CP-OFDM symbols and OFDM symbols, the length of the CP-OFDM symbol shown in this application can also be converted to the length of the OFDM symbol. For example, if the length of the CP is 80 Ts and the length of the CP-OFDM symbol is 1104 Ts, then the length of the OFDM symbol (i.e., the length of the valid data) is 1024 Ts. This application can also use symbol length to represent the length of the CP-OFDM symbol or the length of the OFDM symbol.

[0019] This application illustrates the CP length and symbol length corresponding to each SCS using the same basic time unit as an example. As another possible implementation, the CP length and symbol length values ​​can be the same for different SCSs, but the basic time unit can be different. For example, if the first SCS = 120 kHz, the CP length of the CP-OFDM symbol is 20 Ts, and the total length of the CP-OFDM symbol is 276 Ts; if the first SCS = 60 kHz, the CP length of the CP-OFDM symbol is 20 Ts_d, and the total length of the CP-OFDM symbol is 276 Ts_d. Ts_d = Ts * 2. And so on, without further listing here.

[0020] By designing the CP length and CP-OFDM symbol length as described above, the symbol length (or frame structure) involved in the star-flash technology can be obtained by simply lowering or raising the crystal oscillator frequency (or clock frequency) to achieve the corresponding CP length and CP-OFDM symbol length for different SCSs. This ensures compatibility between symbol lengths and frame structures, reducing the implementation complexity of the device. Furthermore, the CP length and CP-OFDM symbol length designed above can also be obtained by simply lowering or raising the clock frequency (or crystal oscillator frequency or clock sampling frequency, etc.) to achieve a symbol length (or frame structure) compatible with new radio (NR). This allows for the reuse of NR designs, simplifies chip design, and reduces chip implementation complexity.

[0021] In one possible implementation, sending CP-OFDM symbols includes:

[0022] Transmit multiple CP-OFDM symbols, wherein the CP of these multiple CP-OFDM symbols includes a first CP and a second CP, and the first CP and the second CP satisfy at least one of the following:

[0023] The length of the first CP is 80 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 1104 Ts. The length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts.

[0024] The length of the first CP is 88 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 1112 Ts. The length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts.

[0025] The length of the first CP is 40 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 552 Ts. The length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts.

[0026] The length of the first CP is 44 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 556 Ts. The length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts.

[0027] The length of the first CP is 20Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 276Ts. The length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts.

[0028] The length of the first CP is 22Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 278Ts. The length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts.

[0029] The length of the first CP is 10Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 138Ts. The length of the second CP is 9Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137Ts.

[0030] The length of the first CP is 11 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 139 Ts. The length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts.

[0031] The length of the first CP is 5 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69 Ts; the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts; or,

[0032] The length of the first CP is 5.5 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69.5 Ts. The length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts.

[0033] The term "CP" in multiple CP-OFDM symbols, including a first CP and a second CP, refers to the fact that the CP length of a portion of these multiple CP-OFDM symbols (i.e., the CP-OFDM symbol corresponding to the first CP) is the first CP, and the CP length of another portion of these multiple CP-OFDM symbols (i.e., the CP-OFDM symbol corresponding to the second CP) is the second CP. In other words, multiple CP-OFDM symbols include both the CP-OFDM symbol corresponding to the first CP and the CP-OFDM symbol corresponding to the second CP.

[0034] By further refining the CP-OFDM symbol, the frame structure derived from it can be further improved. Designing two types of CPs ensures symbol length alignment and simplifies implementation.

[0035] Secondly, embodiments of this application provide a communication method applied to a second device. The second device may be a WLAN device, or a device involved in a satellite navigation system, or it may be a chip, functional module, processing system, or communication component disposed within the aforementioned device. The method includes:

[0036] Receive a CP-OFDM symbol; parse the CP-OFDM symbol according to a first SCS; the first SCS and the CP-OFDM symbol satisfy at least one of the following:

[0037] The first SCS is 30KHz, the length of the CP in the CP-OFDM symbol is 80Ts, and the length of the CP-OFDM symbol is 1104Ts;

[0038] The first SCS is 60KHz, the length of the CP in the CP-OFDM symbol is 40Ts, and the length of the CP-OFDM symbol is 552Ts;

[0039] The first SCS is 60KHz, the CP length of the CP-OFDM symbol is 44Ts, and the length of the CP-OFDM symbol is 556Ts;

[0040] The first SCS is 120KHz, the CP length of the CP-OFDM symbol is 20Ts, and the length of the CP-OFDM symbol is 276Ts;

[0041] The first SCS is 120KHz, the CP length of the CP-OFDM symbol is 22Ts, and the length of the CP-OFDM symbol is 278Ts;

[0042] The first SCS is 240KHz, the length of the CP in the CP-OFDM symbol is 10Ts, and the length of the CP-OFDM symbol is 138Ts;

[0043] The first SCS is 240KHz, the CP length of the CP-OFDM symbol is 11Ts, and the length of the CP-OFDM symbol is 139Ts;

[0044] The first SCS is 480 kHz, the CP length of the CP-OFDM symbol is 5 Ts, and the length of the CP-OFDM symbol is 69 Ts; or,

[0045] The first SCS is 480KHz, the CP length of the CP-OFDM symbol is 5.5Ts, and the length of the CP-OFDM symbol is 69.5Ts.

[0046] For details regarding the second aspect, please refer to the first aspect; further explanation will not be provided here.

[0047] In one possible implementation, receiving CP-OFDM symbols includes:

[0048] Receive multiple CP-OFDM symbols, wherein the CP of these multiple CP-OFDM symbols includes a first CP and a second CP, and the first CP and the second CP satisfy at least one of the following:

[0049] The length of the first CP is 80 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1104 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts;

[0050] The length of the first CP is 88 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1112 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts;

[0051] The length of the first CP is 40 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 552 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts;

[0052] The length of the first CP is 44 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 556 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts.

[0053] The length of the first CP is 20 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 276 Ts, the length of the second CP is 18 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274 Ts;

[0054] The length of the first CP is 22Ts, the length of the CP-OFDM symbol corresponding to the first CP is 278Ts, the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts;

[0055] The length of the first CP is 10 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 138 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts;

[0056] The length of the first CP is 11 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 139 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts;

[0057] The length of the first CP is 5 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69 Ts; the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts; or,

[0058] The length of the first CP is 5.5 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69.5 Ts. The length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts.

[0059] Thirdly, embodiments of this application provide a communication method applied to a first device. A description of the first device is provided in the first aspect and will not be repeated here. The method includes:

[0060] Multiple CP-OFDM symbols are generated based on the first SCS. The CP of these multiple CP-OFDM symbols includes the first CP and the second CP. The length of the first CP is equal to the length of the third CP corresponding to the second SCS × α. The value of α is determined based on the first SCS and the second SCS. The multiple CP-OFDM symbols are then transmitted.

[0061] Without distinguishing between different CP-OFDM symbols, the first CP and the third CP can be collectively referred to as the boundary CP, and the second CP and the fourth CP can be collectively referred to as the general CP.

[0062] This application illustrates the CP length and symbol length corresponding to each SCS using the same basic time unit as an example. As another possible implementation, the CP length and symbol length values ​​can be the same for different SCSs, but the basic time unit can be different. For example, for a first SCS = 120 kHz and a second SCS = 60 kHz, the CP length and symbol length of the CP-OFDM symbol are the same. For instance, in the second SCS = 120 kHz, the CP length of the CP-OFDM symbol is 20 Ts, and the symbol length is 276 Ts; in the first SCS = 60 kHz, the CP length of the CP-OFDM symbol is 20 Ts_d, and the symbol length is 276 Ts_d. Ts_d = Ts × α. And so on, without further listing here.

[0063] In this embodiment, by designing the relationship between the CP lengths corresponding to different SCSs, compatibility of various symbol lengths and frame structures can be achieved by changing clock frequencies of different multiples, thereby reducing the implementation complexity of the device. Frame structure compatibility includes, but is not limited to, compatibility between different frame structures in star flash technology, and compatibility between frame structures in star flash technology and frame structures in NR technology.

[0064] Fourthly, embodiments of this application provide a communication method applied to a second device. A description of the second device is provided in the second aspect and will not be repeated here. The method includes:

[0065] Receive multiple CP-OFDM symbols, where the CP of these multiple CP-OFDM symbols includes a first CP and a second CP. The length of the first CP is equal to the length of the third CP corresponding to the second SCS × α, where the value of α is determined based on the first SCS and the second SCS. Resolve the multiple CP-OFDM symbols based on the first SCS.

[0066] For details regarding the fourth aspect, please refer to the third aspect; further explanation will not be provided here.

[0067] In conjunction with the third or fourth aspect, in one possible implementation, the length of the first CP is greater than the length of the second CP.

[0068] In conjunction with the third or fourth aspect, in one possible implementation, the length of the second CP is equal to the length of the fourth CP corresponding to the second SCS multiplied by α. Optionally, the length of the third CP is greater than the length of the fourth CP.

[0069] In this embodiment, the relationship α between the first CP and the third CP is the same as the relationship α between the second CP and the fourth CP, so different symbol lengths can be obtained by the same multiple of clock frequency, further reducing the implementation complexity of the device.

[0070] In one possible implementation, combining the third or fourth aspect, A2 is the second SCS, and A1 is the first SCS.

[0071] In other words, the value of α is determined based on the first SCS and the second SCS, including: The units of the first SCS are the same as those of the second SCS. For example, if the unit of the second SCS is kHz, the unit of the first SCS is also kHz. Or, if the unit of the second SCS is MHz, the unit of the first SCS is also MHz. The basic time units of the first CP, second CP, third CP, and fourth CP are the same.

[0072] In this embodiment, the length of the first CP is equal to the length of the third CP corresponding to the second SCS multiplied by α. The value of α is determined based on the first SCS and the second SCS, and can also be replaced by: the length of the first CP multiplied by the first SCS = the length of the third CP multiplied by the second SCS. Similarly, the length of the second CP multiplied by the first SCS = the length of the fourth CP multiplied by the second SCS. Similarly, the symbol length corresponding to the first SCS multiplied by the first SCS = the symbol length corresponding to the second SCS multiplied by the second SCS.

[0073] In one possible implementation, combining the third or fourth aspect,

[0074] The value of α is determined based on the first SCS and the second SCS, and can be replaced with: That is, the value of α can be a fixed value or a predefined value.

[0075] In this embodiment of the application, by defining the value of α, the relationship between the clock frequencies of different frame structures can be clearly defined.

[0076] In conjunction with the third or fourth aspect, in one possible implementation, the second SCS is 120 kHz and the length of the third CP is 20 Ts, or the length of the third CP is 22 Ts.

[0077] In this embodiment, by defining the lengths of the second SCS and the third CP, the first SCS can be used as a reference to obtain the frame structure corresponding to the first SCS by raising or lowering the crystal oscillator frequency. This provides more frame structures and improves the flexibility of the frame structure.

[0078] In combination with the third or fourth aspect, in one possible implementation, the length of the fourth CP is 18Ts.

[0079] In conjunction with the third or fourth aspect, in one possible implementation, the first SCS, the first CP, and the second CP satisfy at least one of the following:

[0080] The first SCS is 15KHz, the length of the first CP is 160Ts, or the length of the first CP is 176Ts, and the length of the second CP is 144Ts;

[0081] The first SCS is 30KHz, the length of the first CP is 80Ts, or the length of the first CP is 88Ts, and the length of the second CP is 72Ts;

[0082] The first SCS is 60KHz, the length of the first CP is 40Ts, or the length of the first CP is 44Ts, and the length of the second CP is 36Ts;

[0083] The first SCS is 240kHz, and the length of the first CP is 10Ts, or the length of the first CP is 11Ts, and the length of the second CP is 9Ts; or...

[0084] The first SCS is 480KHz, the length of the first CP is 5Ts, or the length of the first CP is 5.5Ts, and the length of the second CP is 4.5Ts.

[0085] In one possible implementation, combining the third or fourth aspect, the second SCS is 15 kHz, the length of the third CP is 160 Ts, and the length of the fourth CP is 144 Ts.

[0086] In this embodiment, by defining the lengths of the second SCS and the third CP, the first SCS can be based on the second SCS, and the frame structure corresponding to the first SCS can be obtained by raising or lowering the crystal oscillator frequency. This ensures compatibility with the frame structure in NR technology, reuses the design in NR, and simplifies the design of the frame structure.

[0087] In conjunction with the third or fourth aspect, in one possible implementation, the first SCS, the first CP, and the second CP satisfy at least one of the following:

[0088] The first SCS is 30KHz, the first CP is 80Ts long, and the second CP is 72Ts long;

[0089] The first SCS is 60KHz, the first CP is 40Ts long, and the second CP is 36Ts long.

[0090] The first SCS is 120KHz, the first CP is 20Ts long, and the second CP is 18Ts long.

[0091] The first SCS is 240kHz, the first CP length is 10Ts, and the second CP length is 9Ts; or...

[0092] The first SCS is 480KHz, the first CP is 5Ts long, and the second CP is 4.5Ts long.

[0093] In one possible implementation, combining the third or fourth aspect, the second SCS is 30 kHz, the length of the third CP is 88 Ts, and the length of the fourth CP is 72 Ts.

[0094] In this embodiment, by defining the lengths of the second SCS and the third CP, the first SCS can be based on the second SCS, and the frame structure corresponding to the first SCS can be obtained by raising or lowering the crystal oscillator frequency. This allows for compatibility with more frame structures in NR technology, reuse of NR designs, and simplification of frame structure design.

[0095] In conjunction with the third or fourth aspect, in one possible implementation, the first SCS, the first CP, and the second CP satisfy at least one of the following:

[0096] The first SCS is 30KHz, the first CP length is 88Ts, and the second CP length is 72Ts;

[0097] The first SCS is 60KHz, the first CP length is 44Ts, and the second CP length is 36Ts;

[0098] The first SCS is 120KHz, the first CP is 22Ts long, and the second CP is 18Ts long.

[0099] The first SCS is 240kHz, the first CP length is 11Ts, and the second CP length is 9Ts; or...

[0100] The first SCS is 480KHz, the first CP has a length of 5.5Ts, and the second CP has a length of 4.5Ts.

[0101] For further explanation of the third or fourth aspect, please refer to the first or second aspect; they will not be elaborated here.

[0102] Fifthly, embodiments of this application provide a first apparatus for performing the method in the first aspect, the third aspect, or any possible implementation. The first apparatus includes modules for performing the method in the first aspect, the third aspect, or any possible implementation.

[0103] The first device includes a processing module and a transceiver module. The transceiver module is used to perform the sending or receiving actions in the first aspect, the third aspect, or any possible implementation, and the processing module is used to perform the processing actions in the first aspect, the third aspect, or any possible implementation.

[0104] As an example, the first device is a terminal (T) node, or a functional module, circuit, or chip that can be set in a T node, or a device that can be used in conjunction with a T node. As another example, the first device is a management node (or G node), or a functional module, circuit, or chip that can be set in a G node, or a device that can be used in conjunction with a G node. As yet another example, the first device is a STA (such as an AP or non-AP STA), or a functional module, circuit, or chip that can be set in an STA, or a device that can be used in conjunction with an STA.

[0105] Sixthly, embodiments of this application provide a second apparatus for performing the method in the second aspect, the fourth aspect, or any possible implementation. The second apparatus includes modules for performing the method in the second aspect, the fourth aspect, or any possible implementation.

[0106] The second device includes a processing module and a transceiver module. The transceiver module is used to perform the sending or receiving actions in the second aspect, the fourth aspect, or any possible implementation, and the processing module is used to perform the processing actions in the second aspect, the fourth aspect, or any possible implementation.

[0107] As an example, the second device is a G-node, or a functional module, circuit, or chip that can be set in a G-node, or a device that can be used in conjunction with a G-node. As another example, the first device is a T-node, or a functional module, circuit, or chip that can be set in a T-node, or a device that can be used in conjunction with a T-node. As yet another example, the second device is a STA (such as a non-AP STA or AP), or a functional module, circuit, or chip that can be set in an STA, or a device that can be used in conjunction with an STA.

[0108] The modules in the fifth or sixth aspect can also be replaced with units or means, etc. The aforementioned modules can be implemented in software, hardware, or a combination of both.

[0109] In a seventh aspect, embodiments of this application provide a first apparatus comprising at least one processor for executing the methods described in the first, third, or fifth aspects, or any possible implementation thereof. The processor executes a program stored in a memory, and when the program is executed, the methods described in the first, third, or any possible implementation thereof are performed.

[0110] In one possible implementation, the memory is located outside the first device described above.

[0111] In one possible implementation, the memory is located within the first device described above.

[0112] In this embodiment of the application, the processor and memory can also be integrated into a single device, that is, the processor and memory can be integrated together.

[0113] In one possible implementation, the first device further includes a transceiver for receiving, inputting, transmitting, or outputting information. The transceiver may be an input / output interface or may include an antenna with transceiver functionality.

[0114] The processor is used to generate a CP-OFDM symbol based on the first SCS; the transceiver is used to transmit or output the CP-OFDM symbol.

[0115] Eighthly, embodiments of this application provide a second apparatus comprising at least one processor for executing the methods of the second aspect, the fourth aspect, or any possible implementation thereof. The processor executes a program stored in a memory, and when the program is executed, the methods of the second aspect, the fourth aspect, or any possible implementation thereof are executed.

[0116] In one possible implementation, the memory is located outside the second device described above.

[0117] In one possible implementation, the memory is located within the second device described above.

[0118] In this embodiment of the application, the processor and memory can also be integrated into a single device, that is, the processor and memory can be integrated together.

[0119] In one possible implementation, the second device further includes a transceiver for receiving, inputting, transmitting, or outputting information. The transceiver may be an input / output interface or may include an antenna with transceiver functionality.

[0120] A transceiver is used to receive or input CP-OFDM symbols; a processor is used to parse multiple CP-OFDM symbols according to a first SCS.

[0121] Ninthly, embodiments of this application provide a chip including logic circuitry and an interface, the logic circuitry and the interface being coupled to enable the chip to implement the methods as described in the first aspect, the third aspect, or any possible implementation.

[0122] In a tenth aspect, embodiments of this application provide a chip including logic circuitry and an interface, the logic circuitry and the interface being coupled to enable the chip to implement the methods as described in the second aspect, the fourth aspect, or any possible implementation.

[0123] Eleventhly, embodiments of this application provide a computer-readable storage medium for storing a computer program that, when run on a computer, causes the methods shown in any of the first to fourth aspects or any possible implementation thereof to be executed.

[0124] This computer program can also be called an instruction, or a computer instruction, etc. That is, a computer program can be replaced by an instruction or a computer instruction.

[0125] In a twelfth aspect, embodiments of this application provide a computer program product that, when run on a computer, causes the methods in any of the first to fourth aspects or any possible implementations described above to be executed.

[0126] The computers shown in the eleventh or twelfth aspect include, but are not limited to, G nodes, T nodes, APs, or STAs.

[0127] In a thirteenth aspect, embodiments of this application provide a communication system. This measurement system includes a first device and a second device. The first device may be the device provided in the fifth, seventh, or ninth aspect, and the second device may be the device provided in the sixth, eighth, or tenth aspect. The first device can be used to perform the methods in the first or third aspect or any possible implementation described above, and the second device is used to perform the methods in the second or fourth aspect or any possible implementation described above. Attached Figure Description

[0128] Figure 1 is a schematic diagram of the architecture of the communication system provided in an embodiment of this application;

[0129] Figures 2a and 2b are schematic diagrams of the frame structure of NR for different SCS;

[0130] Figure 3 is a flowchart illustrating the communication method provided in an embodiment of this application;

[0131] Figure 4 is a schematic diagram of the frame structure with a first SCS of 120KHz provided in an embodiment of this application;

[0132] Figure 5 is a schematic diagram of the frame structure for the first SCS = 60KHz provided in an embodiment of this application;

[0133] Figure 6 is a schematic diagram of the frame structure with a first SCS of 30KHz provided in an embodiment of this application;

[0134] Figure 7 is a schematic diagram of the frame structure for the first SCS = 15KHz provided in an embodiment of this application;

[0135] Figure 8 is a schematic diagram of the frame structure with a first SCS of 240KHz provided in an embodiment of this application;

[0136] Figure 9 is a schematic diagram of the frame structure with a first SCS of 480KHz provided in an embodiment of this application;

[0137] Figure 10 is a flowchart illustrating the communication method provided in an embodiment of this application;

[0138] Figure 11 is a schematic diagram of a communication device provided in an embodiment of this application;

[0139] Figure 12 is a schematic diagram of another structure of the communication device provided in an embodiment of this application;

[0140] Figure 13 is a schematic diagram of a chip structure provided in an embodiment of this application. Detailed Implementation

[0141] To facilitate understanding of the technical solution of this application, the application will be further described below with reference to the accompanying drawings.

[0142] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used only to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0143] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0144] In this application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. "Or" indicates that there can be two relationships, such as only A exists and only B exists; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A exists, only B exists, and both A and B exist simultaneously. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0145] In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of instructing A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A.

[0146] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission by other units or modules via the air interface. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY by other units or modules via the air interface. "Send" can also be understood as the "output" of a chip interface, and "receive" can also be understood as the "input" of a chip interface. In other words, sending and receiving can occur between devices, such as between a first device and a second device, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via a bus, trace, or interface.

[0147] The system involved in this application is described below.

[0148] The technical solutions provided in this application can also be applied to Sparklink standards, such as Sparklink Basic (SLB) access standards, Sparklink Low Energy (SLE) access standards, Sparklink Positioning (SLP) standards, or Ultra Wideband (UWB) standards. Furthermore, the technical solutions provided in this application can be applied to wireless local area network (WLAN) systems. Additionally, the technical solutions provided in this application can be applied to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series standards, such as the 802.11be standard, the 802.11bn standard (also known as Wi-Fi 8, or Ultra High Reliability (UHR)), or next-generation standards, etc., which will not be listed here. The technical solutions provided in this application can also be applied to the following communication systems, such as Internet of Things (IoT) systems, vehicle-to-everything (V2X, where X can represent anything), device-to-device (D2D), narrowband Internet of Things (NB-IoT) systems, long-term evolution (LTE) systems, 5th-generation (5G) communication systems, and new communication systems emerging in future communication development. For example, V2X can include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), or vehicle-to-network (V2N) communication.

[0149] The method provided in this application embodiment can be implemented by a communication device in a communication system. That is, the communication device is used to implement the method provided in this application embodiment.

[0150] The communication device includes a first device or a second device. As an example, the first device is a management node (or G node), and the second device is a terminal (T) node. The G node and T node can be nodes involved in StarLight SLB, SLE, or SLP. For example, a T node can include barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), lidar, battery cells, mobile phones with positioning capabilities, wearable devices, personal digital assistants (PDAs), positioning cards, or positioning terminals, etc. Alternatively, the first device is a T node, and the second device is a G node. Alternatively, both the first and second devices are T nodes. Alternatively, both the first and second devices are G nodes. As another example, the first device is a master device as described in the Bluetooth Low Energy standard, and the second device is a slave device as described in the Bluetooth Low Energy standard. Alternatively, the first device is a slave device, and the second device is a master device. As another example, the first device is an access point (AP), and the second device is a non-access point station (non-AP STA). Alternatively, the first device is a non-AP STA, and the second device is an AP. Alternatively, both the first and second devices are APs. Alternatively, both the first and second devices are non-AP STAs. As yet another example, the first device is a network device, and the second device is a terminal device. Alternatively, the second device is a terminal device, and the first device is a network device. Alternatively, both the first and second devices are terminal devices. Alternatively, both the first and second devices are network devices. Optionally, the first device can also be a chip, functional module, or processing system, etc., from the aforementioned devices. The second device can also be a chip, functional module, or processing system, etc., from the aforementioned devices.

[0151] In a communication scenario, multiple communication domains can exist. A communication domain includes a first device and at least one second device. The first device can be used to schedule the second device. Or, the first device can be used to control the second device. The first device has management capabilities. For example, the first device can be used to manage and allocate time-frequency resources, and has the function of scheduling time-frequency resources for communication between devices in the communication domain. For example, a communication domain can refer to a system consisting of a group of devices with communication relationships, and the communication connections (i.e., communication links) between the devices.

[0152] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. Figure 1 exemplarily illustrates a communication domain, which includes a first device and three second devices, such as second device 1, second device 2, and second device 3. The communication system shown in Figure 1 is merely an example and is not intended to limit the embodiments of this application.

[0153] The methods involved in this application are described below.

[0154] Due to significant differences in channel environments, and to match diverse application scenarios and maximize system spectral utilization, current Starflash systems tend to define frame structures with multiple cyclic prefix (CP) lengths to facilitate matching different application scenarios. Different CP lengths correspond to different subcarrier spacing (SCS). Different SCS are required to match different scenarios for different service types, frequency bands, and mobile speeds. For example, a larger SCS can be used for ultra-reliable and low-latency communication (URLLC). Conversely, a smaller SCS can be used for low-frequency bands with large coverage. Similarly, a larger SCS can be used for high-frequency bands (e.g., large bandwidth, high phase noise). And finally, a larger SCS can be used for ultra-high-speed mobile scenarios.

[0155] The effects of SCS on coverage, latency, mobility, and phase noise are as follows:

[0156] Coverage: The smaller the SCS, the longer the symbol length, and the longer the CP, the better the coverage.

[0157] Mobility: The larger the SCS, the smaller the impact of Doppler frequency shift, and the better the performance;

[0158] Latency: The larger the SCS, the shorter the symbol length, and the smaller the latency;

[0159] Phase noise: The larger the SCS, the smaller the impact of phase noise and the better the performance.

[0160] Therefore, to fully match various scenarios, multiple SCSs can be adopted. In NR technology, based on 15kHz, a series of scalable SCSs are obtained by extending the frequency to powers of 2. Their main parameters are shown in Table 1.

[0161] Table 1

[0162] Table 2 provides examples of the CP length and OFDM symbol length for each SCS. For normal CP (NCP), the CP length of the first symbol within every 0.5 ms is longer than the CP length of the other symbols.

[0163] Table 2

[0164] In this application, Ts = 1 / fs, where fs is the physical layer reference frequency, such as fs = 30.72MHz. Alternatively, Ts = 1 / (15000 × 2048) seconds (s). Of course, as standards evolve, the calculation method for Ts may change, and with changes in Ts, the various lengths shown in this application can also be assigned new units based on the new calculation method. The new units for the various lengths obtained based on the change in the calculation method of Ts also fall within the scope of protection of this application. The relevant explanations regarding Ts here also apply to the following text, and will not be repeated here.

[0165] Table 2 shows the symbol length using the length of the effective data as an example. The symbol length shown in Table 2 can also be referred to as the OFDM symbol length. Optionally, the symbol length can also include the length of the CP and the length of the effective data. For example, if SCS = 15 kHz and the CP length is 160 Ts, the symbol length can also be 2048 Ts + 160 Ts = 2208 Ts. For ease of distinction, this application refers to the length of the effective data as the OFDM symbol length, and the sum of the length of the effective data and the length of the CP is referred to as the CP-OFDM symbol length. The symbols shown below can be OFDM symbols or CP-OFDM symbols.

[0166] Table 3 exemplifies different CP types. 160Ts*[1 / (15000×2048)]s≈5.2μs. Conversions between Ts and μs for other lengths are not listed here. In Table 3, i refers to the symbol index within 1ms, with the first symbol within 1ms having an index of 0, and so on.

[0167] Table 3

[0168] Figures 2a and 2b are schematic diagrams of the NR frame structure for different SCS. As shown in Figure 2a, for SCS = 15kHz, there are 7 symbols within 0.5ms. The CP length of the first symbol (symbol index 0) is 160Ts (i.e., 5.2μs), and the CP length of the other symbols is 144Ts (i.e., 4.69μs). That is, there are 14 symbols within 1ms, and the symbol indices of 0 and 7 have a CP length of 160Ts. For SCS = 30kHz, there are 14 symbols within 0.5ms. The CP length of the first symbol (symbol index 0) is 88Ts, and the CP length of the other symbols is 72Ts. That is, there are 28 symbols within 1ms, and the symbol indices of 0 and 14 have a CP length of 88Ts. For an SCS of 60kHz, there are 28 symbols within 0.5ms. The CP length of the first symbol (symbol index 0) is 52Ts, and the CP lengths of the other symbols are 36Ts. That is, there are 56 symbols within 1ms, and the symbol indices of 0 and 28 have a CP length of 52Ts. Figure 2b illustrates the hybrid frame structure exemplarily. For a related explanation of the CP length under each SCS in Figure 2b, please refer to Figure 2a.

[0169] In the Starflash technology, the SCS is 480kHz, and the CP length of each symbol is 5Ts or 14Ts. Obtaining an equivalent SCS of 15kHz by downclocking yields a CP length of 160Ts or 448Ts, which is not well compatible with the NR's SCS of 15kHz symbol length (160Ts and 144Ts). Therefore, the frame structure parameters in the Starflash technology are incompatible with those in NR, resulting in high implementation complexity.

[0170] In view of this, embodiments of this application provide a communication method and apparatus, which designs different SCSs and corresponding CP lengths, achieving compatibility between symbol lengths corresponding to different SCSs. Thus, not only can the symbol lengths and CP lengths involved in the star flash technology be obtained by simply lowering or raising the crystal oscillator frequency (or clock frequency) to obtain the CP lengths and symbol lengths corresponding to different SCSs, ensuring frame structure compatibility and reducing device implementation complexity; it can also obtain frame structures compatible with NR frame structures by simply lowering or raising the crystal oscillator frequency (or clock frequency), thereby reusing NR designs, simplifying chip design, and reducing chip implementation complexity.

[0171] Figure 3 is a flowchart illustrating the communication method provided in an embodiment of this application. The descriptions of the first and second devices involved in this method are as above and will not be detailed here. As shown in Figure 3, the method includes:

[0172] 301. The first device generates a CP-OFDM symbol based on the first SCS. For an explanation of the CP-OFDM symbol, please refer to Examples 1 to 8.

[0173] The SCS (Signal Type Function) is the value carried on the subcarrier of the first SCS, which is then transformed into a CP-OFDM symbol in the time domain through an inverse Fourier transform. Therefore, the CP-OFDM symbol is generated based on the first SCS. Besides the inverse Fourier transform, the subcarrier can also undergo other processing operations to form CP-OFDM symbols. It should be understood that the inverse Fourier transform and other processing operations described here are general procedures for converting frequency-domain signals to time-domain signals, and existing processing methods can be referenced; they will not be elaborated upon here. The embodiments of this application do not limit the value carried on the subcarrier.

[0174] The following describes the CP-OFDM symbols involved in the embodiments of this application. For ease of description, the CP-OFDM symbol corresponding to the first CP is referred to as the first CP-OFDM symbol, and the CP-OFDM symbol corresponding to the second CP is referred to as the second CP-OFDM symbol. Similarly, the OFDM symbol corresponding to the first CP is referred to as the first OFDM symbol, and the OFDM symbol corresponding to the second CP is referred to as the second OFDM symbol. The first CP can also be called the boundary CP, and the second CP can be called the general CP. The specific name of the CP is not limited in the embodiments of this application. Examples 1 to 8 below are shown as examples where the first CP is greater than the second CP. Optionally, the first CP can also be equal to the second CP.

[0175] Example 1

[0176] Table 4 exemplarily illustrates the CP length and CP-OFDM symbol length at a first SCS = 120 kHz. Within 125 μs, the number of first CPs is less than the number of second CPs. Table 4 not only shows the various lengths in Ts, but also exemplarily shows the various lengths in μs. Symbol type 1 and symbol type 2 shown in Table 4 are numbered to distinguish different symbols and are not intended to limit the embodiments of this application.

[0177] Table 4

[0178] Table 5 provides an example of the CP length and OFDM symbol length at a first SCS of 120 kHz. For further explanation of Table 5, please refer to Table 4; details will not be elaborated here.

[0179] Table 5

[0180] The first and second columns shown in Tables 4 and 5 are merely examples and represent optional information regarding symbol length. Optionally, the CP length corresponding to symbol type 1 can be compatible with the CP length corresponding to NR 15kHz, and the symbol length corresponding to symbol type 1 can be compatible with the symbol length corresponding to NR 15kHz. The CP length corresponding to symbol type 2 can be compatible with the CP length corresponding to NR 30kHz, and the symbol length corresponding to symbol type 2 can be compatible with the symbol length corresponding to NR 30kHz.

[0181] Figure 4 is a schematic diagram of the frame structure of the first SCS=120KHz provided in the embodiment of this application.

[0182] As shown in Figure 4(a), for symbol type 1 shown in Table 4, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as that of the eighth CP-OFDM symbol, which is 20Ts. The CP length of the remaining CP-OFDM symbols is 18Ts. 276Ts*2+274*12Ts=3840Ts=125μs. That is, there are 14 CP-OFDM symbols within 125μs. Combining the CP length and symbol length of SCS=15KHz in the NR shown above, since 120KHz / 15KHz=8, 160Ts / 20Ts=8, and 144Ts / 18Ts=8, when the SCS is updated from 120KHz to 15KHz, the first device can reduce the clock frequency (or the reference frequency corresponding to SCS=120kHz) by a factor of 8 to achieve compatibility between the symbol length and CP length. In other words, by adjusting the clock frequency parameters, the conversion from SCS=120kHz to SCS=15kHz can be achieved, effectively reducing the implementation complexity. This achieves compatibility between the 120kHz frame structure in Starflash technology and the 15kHz frame structure in NR. Specifically, by increasing the duration of the 14 CP-OFDM symbols of symbol type 1 within 125μs by 8 times, it can be made identical to the duration (i.e., 1ms) and corresponding symbol type of SCS=15kHz.

[0183] As shown in Figure 4(b), for symbol type 2 shown in Table 4, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 22Ts, and the CP length of the remaining CP-OFDM symbols is 18Ts. 278Ts + 274Ts * 13 = 3840Ts = 125μs. That is, there are 14 CP-OFDM symbols within 125μs. Combining the CP length and symbol length in NR with SCS = 30KHz shown above, since 120KHz / 30KHz = 4, 88Ts / 22Ts = 4, and 72Ts / 18Ts = 4, when SCS is updated from 120KHz to 30KHz, the first device can reduce the clock frequency by 4 times to achieve compatibility between symbol length and CP length. By adjusting the clock frequency parameters, the conversion from SCS = 120KHz to SCS = 30KHz can be achieved, effectively reducing the implementation complexity. This achieves compatibility between the frame structure at 120kHz in the Starflash technology and the frame structure at 30kHz in NR. In other words, by increasing the duration of the 14 CP-OFDM symbols of symbol type 2 within 125μs by a factor of 4, it can be made to match the duration (i.e., 0.5ms) and corresponding symbol type of SCS = 30kHz.

[0184] The frame structure based on CP-OFDM symbols is illustrated using the CP length and CP-OFDM symbol length at 120kHz as examples.

[0185] For example, the duration of a superframe is Tf = 30720 × Ts = 1 ms, and the duration of a half-superframe is Thf = 15360 × Ts = 0.5 ms. Therefore, a superframe contains 14 * 8 = 112 CP-OFDM symbols. The symbol indices of these 112 symbols range from 0 to 111.

[0186] Taking symbol type 1 as an example, the indices of CP-OFDM symbols with a CP length of 20Ts are 0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, and 105.

[0187] Taking symbol type 2 as an example, the indices of CP-OFDM symbols with a CP length of 22Ts are 0, 14, 28, 42, 56, 70, 84, and 98.

[0188] For example, a superframe can include 8 radio frames, numbered sequentially from front to back as #0, #1, ..., #7. The first half of a superframe contains radio frames numbered #0, #1, #2, #3, and the second half contains radio frames numbered #4, #5, #6, #7. A radio frame can also include 14 CP-OFDM symbols.

[0189] Generally, the CP-OFDM symbols used in the transmission links of G nodes can be called G symbols, and the CP-OFDM symbols used in the transmission links of T nodes can be called T symbols. The symbols in a radio frame can be flexibly configured as G symbols, T symbols, and handover intervals. In a radio frame, when the links of two adjacent data symbols are different, the interval between these two adjacent symbols can be called the first handover interval. For two adjacent radio frames, when the link between the last data symbol of the preceding radio frame and the first symbol of the following radio frame is different, the last symbol of the preceding radio frame should be the first handover interval. Therefore, based on configuration, if no handover occurs within a radio frame, the frame structure includes: either multiple G symbols sequentially; or multiple T symbols sequentially. Based on configuration, if a radio frame contains one handover, the frame structure includes: either one or more G symbols, the first handover interval, and one or more T symbols sequentially; or one or more T symbols and the first handover interval sequentially; or one or more G symbols and the first handover interval sequentially. Based on configuration, if a radio frame contains two handovers, the frame structure includes: either one or more G symbols, the first handover interval, one or more T symbols, and the first handover interval sequentially. They will not be listed one by one here.

[0190] The frame structures listed above based on CP-OFDM symbols are merely examples. The configuration method from CP-OFDM symbols to frame structures is a general design and can be referenced from existing standards. No limitations are imposed here.

[0191] For frame structures under other SCS, you can refer to the frame structure under SCS=120KHz, as the principle is similar. The frame structures under other SCS will not be described in detail below.

[0192] Example 2

[0193] Table 6 exemplarily shows the CP length and CP-OFDM symbol length at a first SCS of 60 kHz. Within 250 μs, the number of first CPs is less than the number of second CPs. Further explanation of Table 6 can be found in Table 4, etc., and will not be elaborated upon here.

[0194] Table 6

[0195] Table 7 provides an example of the CP length and OFDM symbol length at a first SCS of 60 kHz. For further explanation of Table 7, please refer to Table 4 or Table 6; details will not be elaborated here.

[0196] Table 7

[0197] The first and second columns shown in Tables 6 and 7 are merely examples and are optional information regarding symbol length.

[0198] Figure 5 is a schematic diagram of the frame structure of the first SCS=60KHz provided in the embodiment of this application.

[0199] As shown in Figure 5(a), for symbol type 1 as shown in Table 6, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as that of the eighth CP-OFDM symbol, which is 40Ts. The CP length of the remaining CP-OFDM symbols is 36Ts. 552Ts*2+548*12Ts=7680Ts=250μs. That is, there are 14 CP-OFDM symbols within 250μs. Combining the CP length and symbol length of SCS=15KHz in NR shown above, since 60KHz / 15KHz=4, 160Ts / 40Ts=4, and 144Ts / 36Ts=4, when SCS is updated from 60KHz to 15KHz, the first device can reduce the clock frequency by 4 times to achieve the conversion between frame structures. This achieves compatibility between the frame structure at 60KHz in the star flash technology and the frame structure at 15KHz in NR. In other words, by increasing the duration of the 14 CP-OFDM symbols of symbol type 1 within 250μs by 4 times, it can be the same as the duration (i.e., 1ms) of SCS = 15KHz and the corresponding symbol type.

[0200] As shown in Figure 5(b), for symbol type 2 as shown in Table 6, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 44Ts, and the CP length of the remaining CP-OFDM symbols is 36Ts. 556Ts + 548Ts * 13 = 7680Ts = 250μs. That is, there are 14 CP-OFDM symbols within 250μs. Combining the CP length and symbol length in NR with SCS = 30kHz shown above, since 60kHz / 30kHz = 2, 88Ts / 44Ts = 4, and 72Ts / 36Ts = 2, when the SCS is updated from 60kHz to 30kHz, the first device can reduce the clock frequency by a factor of 2 to achieve the conversion between frame structures. This achieves compatibility between the 60kHz frame structure in the star flash technology and the 30kHz frame structure in NR. In other words, by doubling the duration of the 14 CP-OFDM symbols of symbol type 2 within 250μs, it can be the same as the duration (i.e., 0.5ms) and corresponding symbol type of SCS = 30KHz.

[0201] Example 3

[0202] Table 8 exemplarily shows the CP length and CP-OFDM symbol length at a first SCS of 30 kHz. Within 500 μs, the number of first CPs is less than the number of second CPs. Further explanation of Table 8 can be found in Tables 4 or 6, etc., and will not be elaborated here.

[0203] Table 8

[0204] Table 9 provides an example of the CP length and OFDM symbol length at a first SCS of 30 kHz. For further explanation of Table 9, please refer to Tables 4, 6, or 8, etc., which will not be detailed here.

[0205] Table 9

[0206] The first and second columns shown in Tables 8 and 9 are merely examples and are optional information regarding symbol length.

[0207] Figure 6 is a schematic diagram of the frame structure for the first SCS=30KHz provided in an embodiment of this application.

[0208] As shown in Figure 6(a), for symbol type 1 as shown in Table 8, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as that of the eighth CP-OFDM symbol, which is 80Ts. The CP length of the remaining CP-OFDM symbols is 72Ts. 1104Ts*2+1096*12Ts=15360Ts=500μs. That is, there are 14 CP-OFDM symbols within 500μs. Combining the CP length and symbol length of SCS=15KHz in NR shown above, since 30KHz / 15KHz=2, 160Ts / 80Ts=2, and 144Ts / 72Ts=2, when SCS is updated from 30KHz to 15KHz, the first device can reduce the clock frequency by half to achieve the conversion between frame structures. This achieves compatibility between the 30kHz frame structure in the star flash technology and the 15kHz frame structure in NR. In other words, by doubling the duration of the 14 CP-OFDM symbols of symbol type 1 within 500μs, it can be identical to the duration (i.e., 1ms) and corresponding symbol type of SCS = 15kHz.

[0209] As shown in Figure 6(b), for symbol type 2 shown in Table 8, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 88Ts, and the CP length of the remaining CP-OFDM symbols is 72Ts. Further details regarding symbol type 2 are omitted here.

[0210] Example 4

[0211] Table 10 exemplarily shows the CP length and CP-OFDM symbol length at a first SCS of 15 kHz. Within 1 ms, the number of first CPs is less than the number of second CPs. Further explanation of Table 10 can be found in Tables 4, 6, or 8, etc., and will not be elaborated upon here.

[0212] Table 10

[0213] Table 11 provides an example of the CP length and OFDM symbol length at a first SCS of 15 kHz. For further explanation of Table 11, please refer to Tables 4, 6, or 8, etc., which will not be detailed here.

[0214] Table 11

[0215] The first and second columns shown in Tables 10 and 11 are merely examples and are optional information regarding symbol length.

[0216] Figure 7 is a schematic diagram of the frame structure for the first SCS = 15kHz provided in an embodiment of this application. As shown in Figure 7(a), for symbol type 1 shown in Table 10, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as the CP length of the eighth CP-OFDM symbol, which is 160Ts. The CP length of the remaining CP-OFDM symbols is 144Ts. For a related description of the frame structure for symbol type 1, please refer to the description of SCS = 15kHz in NR, which will not be detailed here. As shown in Figure 7(b), for symbol type 2 in Table 10, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 176Ts, and the CP length of the remaining CP-OFDM symbols is 144Ts.

[0217] For further explanation of Table 10 or Table 11 or Figure 7, please refer to the relevant descriptions in Examples 1 to 3, which will not be elaborated here.

[0218] Example 5

[0219] Table 12 exemplarily shows the CP length and CP-OFDM symbol length at a first SCS of 240 kHz. Within 62.5 μs, the number of first CPs is less than the number of second CPs.

[0220] Table 12

[0221] Table 13 provides an example of the CP length and OFDM symbol length at a first SCS of 240 kHz.

[0222] Table 13

[0223] The first and second columns shown in Tables 12 and 13 are merely examples and are optional content regarding the symbol length description.

[0224] Figure 8 is a schematic diagram of the frame structure for the first SCS = 240kHz provided in an embodiment of this application. As shown in Figure 8(a), for symbol type 1 shown in Table 12, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as the CP length of the eighth CP-OFDM symbol, which is 10Ts, and the CP length of the remaining CP-OFDM symbols is 9Ts. As shown in Figure 8(b), for symbol type 2 in Table 12, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 11Ts, and the CP length of the remaining CP-OFDM symbols is 9Ts.

[0225] For further explanation of Table 12 or Table 13 or Figure 8, please refer to the relevant descriptions in Examples 1 to 4, which will not be elaborated here.

[0226] Example 6

[0227] Table 14 provides an example of the CP length and CP-OFDM symbol length at a first SCS of 480 kHz. Within 31.25 μs, the number of first CPs is less than the number of second CPs.

[0228] Table 14

[0229] Table 15 provides an example of the CP length and OFDM symbol length at a first SCS of 240 kHz.

[0230] Table 15

[0231] The first and second columns shown in Tables 14 and 15 are merely examples and are optional content regarding the symbol length description.

[0232] Figure 9 is a schematic diagram of the frame structure with a first SCS of 480 kHz provided in an embodiment of this application. As shown in Figure 9(a), for symbol type 1 shown in Table 14, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is the same as the CP length of the eighth CP-OFDM symbol, which is 5 Ts, and the CP length of the remaining CP-OFDM symbols is 4.5 Ts. As shown in Figure 9(b), for symbol type 2 in Table 14, the CP length of the first CP-OFDM symbol among the 14 CP-OFDM symbols is 5.5 Ts, and the CP length of the remaining CP-OFDM symbols is 4.5 Ts.

[0233] For further explanation of Table 14, Table 15, or Figure 9, please refer to the relevant descriptions in Examples 1 to 5, which will not be elaborated here.

[0234] Example 7

[0235] Table 16 provides an example of the CP length and CP-OFDM symbol length at a first SCS of 45 kHz. Within 1 / 3 ms, the number of first CPs is less than the number of second CPs.

[0236] Table 16

[0237] Table 17 provides an example of the CP length and OFDM symbol length at a first SCS of 45 kHz.

[0238] Table 17

[0239] The first and second columns shown in Tables 16 and 17 are merely examples and are optional information regarding symbol length. Further explanations of Example 7 can be found in Examples 1 through 6, and will not be elaborated upon here.

[0240] Example 8

[0241] Table 18 provides an example of the CP length and CP-OFDM symbol length at a first SCS of 75 kHz. Within 200 μs, the number of first CPs is less than the number of second CPs.

[0242] Table 18

[0243] Table 19 provides an example of the CP length and OFDM symbol length at a first SCS of 75 kHz.

[0244] Table 19

[0245] The first and second columns shown in Tables 18 and 19 are merely examples and are optional information regarding symbol length. Further explanation of Example 8 can be found in Examples 1 through 6, and will not be elaborated upon here.

[0246] In one possible implementation, the standard can define the CP-OFDM symbol length and CP length corresponding to one of the SCSs in Examples 1 to 8. For example, define an SCS of 120 kHz and its corresponding CP-OFDM symbol and CP. The CP-OFDM symbol and CP corresponding to other SCSs can be determined using the CP-OFDM symbol and CP corresponding to the SCS of 120 kHz, as shown in Figure 10 below.

[0247] In another possible implementation, the standard may define the CP-OFDM symbol length and CP length for at least two SCSs in Examples 1 to 8.

[0248] As one possible implementation, the CP-OFDM symbol in step 301 can be any of the CP-OFDM symbols involved in Examples 1 to 8. For example, the CP-OFDM symbol could be either the first CP-OFDM symbol corresponding to a first SCS of 120 kHz or the second CP-OFDM symbol. Another example is the CP-OFDM symbol corresponding to a first CP-OFDM symbol corresponding to a first SCS of 60 kHz or the second CP-OFDM symbol. These will not be listed individually here.

[0249] As another possible implementation, the CP-OFDM symbol in step 301 can be any of the CP-OFDM symbols corresponding to symbol type 1 in Examples 1 to 8. For example, the CP-OFDM symbol could be either the first or second CP-OFDM symbol corresponding to symbol type 1 in the first SCS = 120 kHz range. Another example is the first or second CP-OFDM symbol corresponding to symbol type 1 in the first SCS = 60 kHz range. These will not be listed individually here.

[0250] As another possible implementation, the CP-OFDM symbol in step 301 can be any of the CP-OFDM symbols corresponding to symbol type 2 in Examples 1 to 8. For example, the CP-OFDM symbol could be either the first or second CP-OFDM symbol corresponding to symbol type 2 in the first SCS = 120 kHz range. Or, for example, the CP-OFDM symbol could be either the first or second CP-OFDM symbol corresponding to symbol type 2 in the first SCS = 60 kHz range. These will not be listed individually here.

[0251] As another possible implementation, the first device can generate multiple CP-OFDM symbols, which are either the CP-OFDM symbols corresponding to symbol type 1 in Examples 1 to 8, or the CP-OFDM symbols corresponding to symbol type 2. For example, these multiple CP-OFDM symbols include the first CP-OFDM symbol and the second CP-OFDM symbol corresponding to symbol type 1 (or symbol type 2) in the first SCS = 120 kHz. Or, for example, these multiple CP-OFDM symbols include the first CP-OFDM symbol and the second CP-OFDM symbol corresponding to symbol type 1 (or symbol type 2) in the first SCS = 60 kHz. These will not be listed individually here.

[0252] As another possible implementation, the first device can generate multiple CP-OFDM symbols, which can be a hybrid structure as described in Examples 1 to 8 above. For example, some of these CP-OFDM symbols may correspond to an SCS of 120 kHz, while others may correspond to an SCS of 60 kHz. Furthermore, some of these CP-OFDM symbols may be of type 1, while others may be of type 2.

[0253] In other words, the multiple CP-OFDM symbols transmitted by the first device can be at least one or more combinations of the CP-OFDM symbols shown in Examples 1 to 8. Alternatively, the CP of the multiple CP-OFDM symbols includes a first CP and a second CP, wherein the first CP and the second CP satisfy at least one of the following:

[0254] The length of the first CP is 80 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 1104 Ts; the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; the length of the first CP is 88 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 1112 Ts; the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; the length of the first CP is 40 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 552 Ts. The length of the second CP is 36Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548Ts; the length of the first CP is 44Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 556Ts; the length of the second CP is 36Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548Ts; the length of the first CP is 20Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 276Ts; the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts; The length of the first CP is 22 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 278 Ts; the length of the second CP is 18 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274 Ts; the length of the first CP is 10 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 138 Ts; the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts; the length of the first CP is 11 Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 139 Ts; the second CP... The length of P is 9Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137Ts; the length of the first CP is 5Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69Ts; the length of the second CP is 4.5Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5Ts; the length of the first CP is 5.5Ts, and the length of the CP-OFDM symbol corresponding to the first CP is 69.5Ts; or, the length of the second CP is 4.5Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5Ts.

[0255] 302. The first device sends a CP-OFDM symbol, and the corresponding second device receives the CP-OFDM symbol.

[0256] 303. The second device parses the CP-OFDM symbol according to the first SCS.

[0257] As an example, the first SCS can be defined by a standard, such as the first SCS being 120kHz or 60kHz. For an explanation of the first SCS, please refer to step 301, which will not be elaborated here.

[0258] As another example, the first SCS can be indicated by higher-layer signaling. For example, higher-layer signaling may indicate that the first SCS is 120kHz or 60kHz, etc., and these will not be listed here.

[0259] The specific configuration of the first SCS is not limited in the embodiments of this application.

[0260] The symbol type corresponding to the first SCS can be indicated by higher-layer signaling or determined according to the application scenario. This application does not limit the specific indication method for the symbol type. As an example, a G node sends a broadcast message including information indicating symbol type 1 or symbol type 2. A T node receives the broadcast message and determines the symbol type based on it. As another example, a G node sends a broadcast message including information indicating the CP length. A T node receives the broadcast message and determines the CP length based on it. As yet another example, the symbol type is determined based on the training sequence. For example, the symbol type (or CP length) is determined based on the sequence attributes of the first training sequence (FTS). Sequence attributes include, but are not limited to, the sequence content of the first FTS. If the first FTS is a first sequence, the symbol type is symbol type 1, such as a CP length of 20Ts or 18Ts; if the first FTS is a human sequence, the symbol type is symbol type 2, such as a CP length of 22Ts or 18Ts. The first sequence and the second sequence are different. As yet another example, the symbol type or CP length is determined based on the broadcast message and the sequence properties of the FTS.

[0261] By using the CP length and CP-OFDM symbol length designed above, the frame structure involved in the star-flash technology can be obtained by simply lowering or raising the crystal oscillator frequency (or clock frequency) to obtain the CP length and CP-OFDM symbol length corresponding to different SCSs, ensuring frame structure compatibility and reducing device implementation complexity. Furthermore, the CP length and CP-OFDM symbol length designed above can also be used to obtain a frame structure compatible with the new radio (NR) frame structure by simply lowering or raising the crystal oscillator frequency (or clock frequency), thereby reusing NR designs, simplifying chip design, and reducing chip implementation complexity.

[0262] Figure 10 is a flowchart illustrating the communication method provided in an embodiment of this application. The descriptions of the first and second devices involved in this method are as above and will not be detailed here. As shown in Figure 10, the method includes:

[0263] 1001. The first device generates multiple CP-OFDM symbols based on the first SCS. The CP of these multiple CP-OFDM symbols includes the first CP and the second CP. The length of the first CP is equal to the length of the third CP corresponding to the second SCS × α.

[0264] The relationship between the lengths of the first and third CPs shown here can be expressed in Ts or in duration (such as μs or ms). As long as the length units of the first and third CPs are the same, the first and third CPs shown above will satisfy the above relationship. The explanation of units here also applies to the second and fourth CPs.

[0265] In one possible implementation, the length of the second CP is equal to the length of the fourth CP corresponding to the second SCS × α.

[0266] Optionally, the length of the first CP is greater than the length of the second CP. Optionally, the length of the third CP is greater than the length of the fourth CP. The relationship α between the first and third CPs is the same as the relationship α between the second and fourth CPs, so different frame structures can be obtained using the same multiple of clock frequency, further reducing the implementation complexity of the device. Without distinguishing between different CP-OFDM symbols, the first and third CPs can be collectively referred to as boundary CPs, and the second and fourth CPs can be collectively referred to as general CPs.

[0267] Optionally, within a certain time period, the number of first CPs is less than the number of second CPs. For an explanation of the time period, please refer to Tables 4 to 19 above; details will not be elaborated here.

[0268] In one possible implementation, the value of α is determined based on the first SCS and the second SCS.

[0269] In one possible implementation, A2 is the second SCS, and A1 is the first SCS. That is, the value of α is determined based on the first SCS and the second SCS, including: The units of the first SCS are the same as those of the second SCS. For example, if the unit of the second SCS is kHz, the unit of the first SCS is also kHz. Or, if the unit of the second SCS is MHz, the unit of the first SCS is also MHz.

[0270] For example, A1×CP1=A2×CP3. A1×CP2=A2×CP4. CP1 is the length of the first CP, CP3 is the length of the third CP, CP2 is the length of the second CP, and CP4 is the length of the fourth CP. The first and second CPs correspond to the first SCS, and the third and fourth CPs correspond to the second SCS. That is, the first and second CPs are CPs of multiple CP-OFDM symbols generated based on the subcarriers of the first SCS, and the third and fourth CPs are CPs of multiple CP-OFDM symbols generated based on the subcarriers of the second SCS. For example, the first and second CPs are two CPs shown in any row of Tables 4 to 19 in Figure 3. Similarly, the third and fourth CPs are two CPs shown in any row of Tables 4 to 19 in Figure 3.

[0271] In one possible implementation, The α values ​​listed here are determined based on the combination of the first and second SCSs. As the standard progresses, more SCSs may emerge, and the value of α will be updated accordingly. The value of α can be a fixed value or a predefined value. By defining the value of α, the relationship between clock frequencies of different frame structures can be clearly defined. Optionally, α is an integer.

[0272] The α shown in the embodiments of this application is based on the second SCS / first SCS as an example. As another possible implementation, based on the relationship between the first SCS, second SCS, first CP, and third CP, the length of the third CP = the length of the first CP × β. Based on the relationship between the first SCS, second SCS, second CP, and fourth CP, the length of the fourth CP = the length of the second CP × β. Wherein, For a detailed explanation of β, please refer to the description of α, which will not be elaborated here. Optionally, β is an integer.

[0273] The following examples illustrate the relationship between the first SCS, the second SCS, the first CP, the second CP, the third CP, and the fourth CP.

[0274] As an example, the second SCS is 120kHz, the third CP is 20Ts long, and the fourth CP is 18Ts.

[0275] For example, the first SCS is 15kHz, the length of the first CP is 160Ts, and the length of the second CP is 144Ts. α = 8.

[0276] For example, the first SCS is 30kHz, the length of the first CP is 80Ts, and the length of the second CP is 72Ts. α = 4.

[0277] For example, the first SCS is 45KHz, the length of the first CP is 160 / 3Ts, and the length of the second CP is 144 / 3Ts.

[0278] For example, the first SCS is 60kHz, the length of the first CP is 40Ts, and the length of the second CP is 36Ts. α = 2.

[0279] For example, the first SCS is 75KHz, the length of the first CP is 32Ts, and the length of the second CP is 28.8Ts.

[0280] For example, the first SCS is 240kHz, the length of the first CP is 10Ts, and the length of the second CP is 9Ts. α = 0.5.

[0281] For example, the first SCS is 480kHz, the length of the first CP is 5Ts, and the length of the second CP is 4.5Ts. α = 0.25.

[0282] As another example, the second SCS is 120KHz, the third CP is 22Ts long, and the fourth CP is 18Ts long.

[0283] For example, the first SCS is 15kHz, the length of the first CP is 176Ts, and the length of the second CP is 144Ts. α = 8.

[0284] For example, the first SCS is 30kHz, the length of the first CP is 88Ts, and the length of the second CP is 72Ts. α = 4.

[0285] For example, the first SCS is 45KHz, the length of the first CP is 176 / 3Ts, and the length of the second CP is 144 / 3Ts.

[0286] For example, the first SCS is 60kHz, the length of the first CP is 44Ts, and the length of the second CP is 36Ts. α = 2.

[0287] For example, the first SCS is 75KHz, the length of the first CP is 35.2Ts, and the length of the second CP is 28.8Ts.

[0288] For example, the first SCS is 240 kHz, the length of the first CP is 11 Ts, and the length of the second CP is 9 Ts. α = 0.5.

[0289] For example, the first SCS is 480kHz, the length of the first CP is 5.5Ts, and the length of the second CP is 4.5Ts. α = 0.25.

[0290] For a second SCS of 120kHz, the frame structure corresponding to the first SCS can be considered a derived frame structure based on the frame structure corresponding to the second SCS. The frame structure corresponding to the second SCS can be called the base frame. This explanation of frame structure also applies to the description of CP and symbols.

[0291] As one possible implementation, the subcarrier spacing of the derived frame (e.g., using Δf) d (represented by f) reference frequency (e.g., f) s_d (This can be represented as an integer or fractional multiple of the parameters corresponding to the base frame. For example, the subcarrier spacing Δf of the derived frame.) d It is generated by integer and fractional multiples of the carrier spacing Δf of the base frame. The reference frequency f of the derived frame s_d It is generated by integer and fractional multiples of the base frame reference frequency fs, f s_d =fs / α=(30.72 / α)MHz.

[0292] As another possible implementation, the CP length and symbol length are the same for different SCSs. However, the basic time unit Ts_d for the CP length and symbol length of the first SCS is an integer multiple and a fractional multiple of the basic time unit Ts for the CP length and symbol length of the second SCS. For example, Ts_d = Ts × α. Taking the second SCS = 120 kHz, the length of the third CP as 22 Ts, and the length of the fourth CP as 18 Ts as an example, if the first SCS = 60 kHz, the length of the first CP is 22 Ts_d, and the length of the second CP is 18 Ts_d, then Ts_d = Ts * 2. Similarly, if the first SCS = 240 kHz, the length of the first CP is 22 Ts_d, and the length of the second CP is 18 Ts_d, then Ts_d = Ts * 0.5. These are not listed individually here.

[0293] Tables 20 and 21 exemplarily illustrate the system parameters for the derived frame structure. Tables 20 and 21 also exemplarily illustrate the basic time units corresponding to different SCSs.

[0294] Table 20

[0295] Table 21

[0296] Table 21 also provides examples of the symbol lengths corresponding to the first SCS = 960 kHz and the first SCS = 1920 kHz. Based on the relationship between the first SCS, the second SCS, the CP length corresponding to the first SCS, and the CP length corresponding to the second SCS, the CP lengths and symbol lengths corresponding to the first SCS = 960 kHz and the first SCS = 1920 kHz will not be listed individually here.

[0297] As yet another example, the second SCS is 15kHz, the third CP is 160Ts long, and the fourth CP is 144Ts long.

[0298] For example, the first SCS is 30kHz, the length of the first CP is 80Ts, and the length of the second CP is 72Ts. α = 0.5.

[0299] For example, the first SCS is 45KHz, the length of the first CP is 160 / 3Ts, and the length of the second CP is 144 / 3Ts.

[0300] For example, the first SCS is 60kHz, the length of the first CP is 40Ts, and the length of the second CP is 36Ts. α = 0.25.

[0301] For example, the first SCS is 75 kHz, the length of the first CP is 32 Ts, and the length of the second CP is 28.8 Ts. α = 0.2.

[0302] For example, the first SCS is 120KHz, the length of the first CP is 20Ts, and the length of the second CP is 18Ts.

[0303] For example, the first SCS is 240KHz, the length of the first CP is 10Ts, and the length of the second CP is 9Ts.

[0304] For example, the first SCS is 480KHz, the length of the first CP is 5Ts, and the length of the second CP is 4.5Ts.

[0305] As yet another example, the second SCS is 30kHz, the third CP is 88Ts long, and the fourth CP is 72Ts long.

[0306] For example, the first SCS is 15kHz, the length of the first CP is 176Ts, and the length of the second CP is 144Ts. α = 2.

[0307] For example, the first SCS is 45KHz, the length of the first CP is 176 / 3Ts, and the length of the second CP is 144 / 3Ts.

[0308] For example, the first SCS is 60kHz, the length of the first CP is 44Ts, and the length of the second CP is 36Ts. α = 0.5.

[0309] For example, the first SCS is 75KHz, the length of the first CP is 35.2Ts, and the length of the second CP is 28.8Ts.

[0310] For example, the first SCS is 120kHz, the length of the first CP is 22Ts, and the length of the second CP is 18Ts. α = 0.25.

[0311] For example, the first SCS is 240KHz, the length of the first CP is 11Ts, and the length of the second CP is 9Ts.

[0312] For example, the first SCS is 480KHz, the length of the first CP is 5.5Ts, and the length of the second CP is 4.5Ts.

[0313] The relationship between the first SCS and the second SCS will not be listed here.

[0314] For a description of the lengths of the various CP and CP-OFDM symbols involved in step 1001, please refer to the relevant description in Figure 3.

[0315] 1002. The first device sends multiple CP-OFDM symbols, and the corresponding second device receives these multiple CP-OFDM symbols.

[0316] 1003. The second device parses multiple CP-OFDM symbols based on the first SCS.

[0317] For an explanation of step 1003, please refer to step 303; it will not be detailed here.

[0318] In this embodiment, by designing the relationship between the CP lengths corresponding to different SCSs, compatibility with various frame structures can be achieved by changing clock frequencies of different multiples, thereby reducing the implementation complexity of the device. Frame structure compatibility includes, but is not limited to, compatibility between different frame structures in star flash technology, and compatibility between frame structures in star flash technology and frame structures in NR technology.

[0319] The above example illustrates the use of one SCS corresponding to two symbol types. As another possible implementation, more symbol types can exist. Taking SCS = 120kHz as an example, Table 22 exemplarily shows the CP length and the length of the CP-OFDM symbol under the first SCS = 120kHz.

[0320] Table 22

[0321] As shown in Table 22, SCS = 120 kHz can also correspond to more CP lengths and symbol lengths. Based on the relationship between symbol types 3 to 5 shown in Table 22 and the CP lengths and symbol lengths corresponding to each SCS shown above, at least one of the following can also be determined: the CP length and symbol length corresponding to SCS = 60 kHz, the CP length and symbol length corresponding to SCS = 240 kHz, the CP length and symbol length corresponding to SCS = 480 kHz, the CP length and symbol length corresponding to SCS = 15 kHz, the CP length and symbol length corresponding to SCS = 30 kHz, the CP length and symbol length corresponding to SCS = 45 kHz, the CP length and symbol length corresponding to SCS = 75 kHz, etc., which will not be listed here one by one.

[0322] The numbering of each symbol type shown above is only an example, and the embodiments of this application do not limit the numbering of each symbol type.

[0323] For any part of the examples, implementations, or embodiments above that is not described in detail, please refer to other places.

[0324] The following describes the communication device provided in the embodiments of this application.

[0325] This application divides the communication device into functional modules according to the above method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware or as software functional modules. It should be noted that the module division in this application is illustrative and only represents one logical functional division; other division methods may be used in actual implementation. The communication device of the embodiments of this application will be described in detail below with reference to Figures 11 to 13.

[0326] Figure 11 is a schematic diagram of a communication device provided in an embodiment of this application. As shown in Figure 11, the communication device includes a processing module 1101 and a transceiver module 1102. The transceiver module 1102 can implement corresponding communication functions, and the processing module 1101 is used to implement corresponding processing functions. For example, the transceiver module 1102 can also be called an interface, a communication interface, or a communication module, etc.

[0327] In some embodiments of this application, the communication device can be used to perform the actions performed by the first device in the above method embodiments. In this case, the first device can be the device itself or a chip or functional module configurable in the device. The transceiver module 1102 is used to perform the transceiver-related operations of the first device in the above method embodiments, and the processing module 1101 is used to perform the processing-related operations of the first device in the above method embodiments.

[0328] Processing module 1101 can generate CP-OFDM symbols based on the first SCS;

[0329] The transceiver module 1102 can be used to send or output the CP-OFDM symbol.

[0330] Reusing Figure 11, in some other embodiments of this application, the communication device can be used to perform the actions performed by the second device in the above method embodiments. In this case, the second device can be the device itself or a chip or functional module configurable in the device. The transceiver module 1102 is used to perform the transceiver-related operations of the second device in the above method embodiments, and the processing module 1101 is used to perform the processing-related operations of the second device in the above method embodiments.

[0331] Transceiver module 1102 can be used to receive CP-OFDM symbols;

[0332] The processing module 1101 can be used to parse the CP-OFDM symbol according to the first SCS.

[0333] For example, the transceiver module 1102 described above can be an antenna module. Alternatively, the transceiver module 1102 can be an input / output module. Optionally, in the above embodiments, the communication device may further include a storage module, which can be used to store instructions and / or data. The processing module 1101 can read the instructions and / or data from the storage module to enable the communication device to implement the aforementioned method embodiments.

[0334] For details regarding the specific explanations of each term, noun, or step in the above embodiments, please refer to the descriptions in the above method embodiments; they will not be detailed here.

[0335] The specific descriptions of the transceiver module and processing module shown in the above embodiments are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments, which will not be described in detail here.

[0336] It is understandable that the module division in the above-mentioned device is merely a logical functional division. Each function can correspond to a functional module, or two or more functions can be integrated into one functional module. In actual implementation, all or some modules can be integrated into one physical entity, or they can be distributed across different physical entities. Furthermore, the above-mentioned functional modules can be implemented in hardware, software, or a combination of both.

[0337] In one example, the functional unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, such as: one or more application-specific integrated circuits (ASICs), or one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0338] The communication device according to the embodiments of this application has been described above. The following describes possible product forms of the communication device. Any product possessing the functions of the communication device described in FIG11 above falls within the protection scope of the embodiments of this application. The following description is merely illustrative and does not limit the product form of the communication device according to the embodiments of this application to this extent.

[0339] In one possible implementation, in the communication device shown in FIG11, the processing module 1101 may be one or more processors, and the transceiver module 1102 may be a transceiver, or the transceiver module 1102 may also be a transmitting module and a receiving module. The transmitting module may be a transmitter, and the receiving module may be a receiver. The transmitting module and the receiving module are integrated into one device, such as a transceiver. In the embodiments of this application, the processor and the transceiver may be coupled, etc., and the connection method of the processor and the transceiver is not limited in the embodiments of this application. In the process of executing the above method, the process of sending information in the above method may be the process of the processor outputting the above information. When outputting the above information, the processor outputs the above information to the transceiver so that the transceiver can transmit it. After the above information is output by the processor, it may need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information in the above method may be the process of the processor receiving the input above information. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the aforementioned information, the information may need to undergo further processing before being input into the processor.

[0340] Figure 12 is a schematic diagram of another structure of the communication device provided in an embodiment of this application. As shown in Figure 12, the communication device 120 includes one or more processors 1220 and transceivers 1210.

[0341] In some embodiments of this application, the communication device can be used to execute the steps, methods, or functions executed by the first device. For example, the processor 1220 can be used to execute the functions or steps implemented by the processing module 1101 shown in FIG. 11, and the transceiver 1210 can be used to execute the functions or steps implemented by the transceiver module 1102 shown in FIG. 11. Detailed descriptions of the processor 1220 and the transceiver 1210 can be found in FIG. 11 or the method embodiments shown above, and will not be elaborated further here.

[0342] In other embodiments of this application, the communication device is used to execute the steps, methods, or functions executed by the second device. For example, the processor 1220 can be used to execute the functions or steps implemented by the processing module 1101 shown in FIG. 11, and the transceiver 1210 can be used to execute the functions or steps implemented by the transceiver module 1102 shown in FIG. 11. Detailed descriptions of the processor 1220 and the transceiver 1210 can be found in FIG. 11 or the method embodiments shown above, and will not be elaborated further here.

[0343] Optionally, the above-mentioned device is a chip, and the transceiver can be an input / output interface. Optionally, the above-mentioned device is a complete device such as a network device or a terminal device, and the transceiver can have the function of transmitting and receiving antennas.

[0344] In various implementations of the communication device shown in Figure 12, the transceiver may include a receiver for performing a receiving function (or operation) and a transmitter for performing a transmitting function (or operation). The transceiver is also used to communicate with other devices / appliances via a transmission medium.

[0345] Optionally, the communication device 120 may further include one or more memories 1230 for storing program instructions and / or data. The memory 1230 is coupled to the processor 1220. The coupling in this embodiment is an indirect coupling or communication connection between communication devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between the communication devices, units, or modules. The processor 1220 may operate in conjunction with the memory 1230. The processor 1220 can execute program instructions stored in the memory 1230. Optionally, at least one of the above-mentioned memories may be included in the processor.

[0346] This embodiment does not limit the specific connection medium between the transceiver 1210, processor 1220, and memory 1230. In Figure 12, the memory 1230, processor 1220, and transceiver 1210 are connected via a bus 1240, indicated by a thick line. The connection methods between other components are merely illustrative and not intended to be limiting. The bus can be categorized as an address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used in Figure 12, but this does not imply that there is only one bus or one type of bus.

[0347] In the embodiments of this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or being executed by a combination of hardware and software modules within the processor.

[0348] In this application embodiment, the memory may include, but is not limited to, non-volatile memory such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM), or compact disc read-only memory (CD-ROM), etc. Memory is any storage medium capable of carrying or storing program code in the form of instructions or data structures, and capable of being read and / or written by a computer (such as the communication device shown in this application), but is not limited to this. The memory in this application embodiment may also be a circuit or any other device capable of implementing storage functions, used to store program instructions and / or data.

[0349] The processor 1220 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process the data of the software programs. The memory 1230 is mainly used to store software programs and data. The transceiver 1210 may include control circuitry and an antenna. The control circuitry is mainly used for converting baseband signals to radio frequency signals and processing radio frequency signals. The antenna is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are mainly used to receive user input data and output data to the user.

[0350] When the communication device is powered on, the processor 1220 can read the software program in the memory 1230, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1220 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit processes the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 1220. The processor 1220 converts the baseband signal into data and processes the data.

[0351] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0352] The communication device shown in this application embodiment may also have more components than those in Figure 12, and this application embodiment does not limit this. The methods executed by the processor and transceiver shown above are only examples, and the specific steps executed by the processor and transceiver can be referred to the methods described above. The dashed lines in Figure 12 indicate optional parts.

[0353] In another possible implementation, in the communication device shown in Figure 11, the processing module 1101 can be one or more logic circuits, and the transceiver module 1102 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 1102 can also be a transmitting module and a receiving module. The transmitting module can be an output interface, and the receiving module can be an input interface. The transmitting module and the receiving module are integrated into one module, such as an input / output interface.

[0354] Figure 13 is a schematic diagram of a chip structure provided in an embodiment of this application. As shown in Figure 13, the chip includes a logic circuit 1301 and an interface 1302. That is, the processing module 1101 can be implemented using the logic circuit 1301, and the transceiver module 1102 can be implemented using the interface 1302. The logic circuit 1301 can be a chip, processing circuit, integrated circuit, or system-on-chip (SoC) chip, etc., and the interface 1302 can be a communication interface, input / output interface, pins, etc. For example, Figure 13 illustrates a chip using the aforementioned communication device as an example, which includes a logic circuit 1301 and an interface 1302.

[0355] In this embodiment, the logic circuit and the interface can also be coupled to each other. The specific connection method of the logic circuit and the interface is not limited in this embodiment. For example, the logic circuit 1301 can be used to execute the functions or steps implemented by the processing module 1101 shown in FIG. 11, and the interface 1302 can be used to execute the functions or steps implemented by the transceiver module 1102 shown in FIG. 11. For a detailed description of the logic circuit 1301 and the interface 1302, please refer to FIG. 11 or the method embodiment shown above, which will not be detailed here.

[0356] The communication device shown in the embodiments of this application can implement the method provided in the embodiments of this application in hardware form, or it can implement the method provided in the embodiments of this application in software form, etc., and the embodiments of this application do not limit it in this way.

[0357] Furthermore, embodiments of this application also provide a communication system, which includes a first device and a second device, the first device and the second device being usable for performing the methods in any of the foregoing embodiments.

[0358] This application also provides a computer program for implementing the operations and / or processes performed by various sites in the methods provided in this application.

[0359] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by various communication devices in the methods provided in this application.

[0360] This application also provides a computer program product comprising computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by various entities in the method provided in this application to be executed.

[0361] In the embodiments provided in this application, it should be understood that the disclosed systems, communication devices, and methods can be implemented in other ways. For example, the communication device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, communication devices, or modules, or it may be an electrical, mechanical, or other form of connection.

[0362] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of this application.

[0363] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0364] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, The method includes: Generate cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbols based on the first SCS; Send the CP-OFDM symbol; The first SCS and the CP-OFDM symbol satisfy at least one of the following: The first SCS is 30KHz, the length of the CP of the CP-OFDM symbol is 80Ts, and the length of the CP-OFDM symbol is 1104Ts; The first SCS is 60KHz, the length of the CP of the CP-OFDM symbol is 40Ts, and the length of the CP-OFDM symbol is 552Ts; The first SCS is 60KHz, the length of the CP of the CP-OFDM symbol is 44Ts, and the length of the CP-OFDM symbol is 556Ts; The first SCS is 120KHz, the length of the CP of the CP-OFDM symbol is 20Ts, and the length of the CP-OFDM symbol is 276Ts; The first SCS is 120KHz, the length of the CP of the CP-OFDM symbol is 22Ts, and the length of the CP-OFDM symbol is 278Ts; The first SCS is 240KHz, the length of the CP of the CP-OFDM symbol is 10Ts, and the length of the CP-OFDM symbol is 138Ts; The first SCS is 240KHz, the length of the CP of the CP-OFDM symbol is 11Ts, and the length of the CP-OFDM symbol is 139Ts; The first SCS is 480 kHz, the CP length of the CP-OFDM symbol is 5 Ts, and the length of the CP-OFDM symbol is 69 Ts; or, The first SCS is 480KHz, the length of the CP of the CP-OFDM symbol is 5.5Ts, and the length of the CP-OFDM symbol is 69.5Ts.

2. The method according to claim 1, characterized in that, Sending the CP-OFDM symbol includes: Send multiple CP-OFDM symbols, wherein the CP of the multiple CP-OFDM symbols includes a first CP and a second CP; The first CP and the second CP satisfy at least one of the following: The length of the first CP is 80 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1104 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; The length of the first CP is 88 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1112 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; The length of the first CP is 40 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 552 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts; The length of the first CP is 44 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 556 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts; The length of the first CP is 20Ts, the length of the CP-OFDM symbol corresponding to the first CP is 276Ts, the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts; The length of the first CP is 22Ts, the length of the CP-OFDM symbol corresponding to the first CP is 278Ts, the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts; The length of the first CP is 10 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 138 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts; The length of the first CP is 11 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 139 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts; The length of the first CP is 5 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 69 Ts, the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts; or, The length of the first CP is 5.5 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 69.5 Ts, the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts.

3. A communication method, characterized in that, The method includes: Receive cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbols; The CP-OFDM symbol is resolved according to the first SCS; The first SCS and the CP-OFDM symbol satisfy at least one of the following: The first SCS is 30KHz, the length of the CP of the CP-OFDM symbol is 80Ts, and the length of the CP-OFDM symbol is 1104Ts; The first SCS is 60KHz, the length of the CP of the CP-OFDM symbol is 40Ts, and the length of the CP-OFDM symbol is 552Ts; The first SCS is 60KHz, the length of the CP of the CP-OFDM symbol is 44Ts, and the length of the CP-OFDM symbol is 556Ts; The first SCS is 120KHz, the length of the CP of the CP-OFDM symbol is 20Ts, and the length of the CP-OFDM symbol is 276Ts; The first SCS is 120KHz, the length of the CP of the CP-OFDM symbol is 22Ts, and the length of the CP-OFDM symbol is 278Ts; The first SCS is 240KHz, the length of the CP of the CP-OFDM symbol is 10Ts, and the length of the CP-OFDM symbol is 138Ts; The first SCS is 240KHz, the length of the CP of the CP-OFDM symbol is 11Ts, and the length of the CP-OFDM symbol is 139Ts; The first SCS is 480 kHz, the CP length of the CP-OFDM symbol is 5 Ts, and the length of the CP-OFDM symbol is 69 Ts; or, The first SCS is 480KHz, the length of the CP of the CP-OFDM symbol is 5.5Ts, and the length of the CP-OFDM symbol is 69.5Ts.

4. The method according to claim 3, characterized in that, Receive CP-OFDM symbols, including: Receive multiple CP-OFDM symbols, wherein the CP of the multiple CP-OFDM symbols includes a first CP and a second CP; The first CP and the second CP satisfy at least one of the following: The length of the first CP is 80 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1104 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; The length of the first CP is 88 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 1112 Ts, the length of the second CP is 72 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 1096 Ts; The length of the first CP is 40 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 552 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts; The length of the first CP is 44 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 556 Ts, the length of the second CP is 36 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 548 Ts; The length of the first CP is 20Ts, the length of the CP-OFDM symbol corresponding to the first CP is 276Ts, the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts; The length of the first CP is 22Ts, the length of the CP-OFDM symbol corresponding to the first CP is 278Ts, the length of the second CP is 18Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 274Ts; The length of the first CP is 10 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 138 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts; The length of the first CP is 11 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 139 Ts, the length of the second CP is 9 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 137 Ts; The length of the first CP is 5 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 69 Ts, the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts; or, The length of the first CP is 5.5 Ts, the length of the CP-OFDM symbol corresponding to the first CP is 69.5 Ts, the length of the second CP is 4.5 Ts, and the length of the CP-OFDM symbol corresponding to the second CP is 68.5 Ts.

5. A communication method, characterized in that, The method includes: Multiple cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbols are generated based on the first subcarrier spacing (SCS). The CP of the multiple CP-OFDM symbols includes a first CP and a second CP. The length of the first CP is equal to the length of the third CP corresponding to the second SCS × α. The value of α is determined based on the first SCS and the second SCS. Send the multiple CP-OFDM symbols.

6. A communication method, characterized in that, The method includes: Receive multiple cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) symbols, wherein the CP of the multiple CP-OFDM symbols includes a first CP and a second CP, and the length of the first CP is equal to the length of the third CP corresponding to the second subcarrier spacing (SCS) × α, and the value of α is determined based on the first SCS and the second SCS; The plurality of CP-OFDM symbols are parsed according to the first SCS.

7. The method according to claim 5 or 6, characterized in that, The length of the second CP is equal to the length of the fourth CP corresponding to the second SCS × α.

8. The method according to claim 7, characterized in that, The length of the first CP is greater than the length of the second CP, and the length of the third CP is greater than the length of the fourth CP.

9. The method according to any one of claims 5-8, characterized in that, A2 is the second SCS, and A1 is the first SCS.

10. The method according to any one of claims 5-9, characterized in that, 11. The method according to any one of claims 5-10, characterized in that, The second SCS is 120KHz, and the length of the third CP is 20Ts, or the length of the third CP is 22Ts.

12. The method according to claim 11, characterized in that, The length of the fourth CP is 18Ts.

13. The method according to claim 12, characterized in that, The first SCS, the first CP, and the second CP satisfy at least one of the following: The first SCS is 15KHz, and the length of the first CP is 160Ts, or the length of the first CP is 176Ts, and the length of the second CP is 144Ts. The first SCS is 30KHz, and the length of the first CP is 80Ts, or the length of the first CP is 88Ts, and the length of the second CP is 72Ts; The first SCS is 60KHz, the length of the first CP is 40Ts, or the length of the first CP is 44Ts, and the length of the second CP is 36Ts; The first SCS is 240 kHz, and the length of the first CP is 10 Ts, or the length of the first CP is 11 Ts, and the length of the second CP is 9 Ts; or... The first SCS is 480KHz, the length of the first CP is 5Ts, or the length of the first CP is 5.5Ts, and the length of the second CP is 4.5Ts.

14. The method according to any one of claims 5-10, characterized in that, The second SCS is 15KHz, the length of the third CP is 160Ts, and the length of the fourth CP is 144Ts.

15. The method according to claim 14, characterized in that, The first SCS, the first CP, and the second CP satisfy at least one of the following: The first SCS is 30KHz, the length of the first CP is 80Ts, and the length of the second CP is 72Ts; The first SCS is 60KHz, the length of the first CP is 40Ts, and the length of the second CP is 36Ts; The first SCS is 120KHz, the length of the first CP is 20Ts, and the length of the second CP is 18Ts; The first SCS is 240 kHz, the length of the first CP is 10 Ts, and the length of the second CP is 9 Ts; or... The first SCS is 480KHz, the length of the first CP is 5Ts, and the length of the second CP is 4.5Ts.

16. The method according to any one of claims 5-10, characterized in that, The second SCS is 30KHz, the length of the third CP is 88Ts, and the length of the fourth CP is 72Ts.

17. The method according to claim 16, characterized in that, The first SCS, the first CP, and the second CP satisfy at least one of the following: The first SCS is 30KHz, the length of the first CP is 88Ts, and the length of the second CP is 72Ts; The first SCS is 60KHz, the length of the first CP is 44Ts, and the length of the second CP is 36Ts; The first SCS is 120KHz, the length of the first CP is 22Ts, and the length of the second CP is 18Ts. The first SCS is 240 kHz, the length of the first CP is 11 Ts, and the length of the second CP is 9 Ts; or, The first SCS is 480KHz, the length of the first CP is 5.5Ts, and the length of the second CP is 4.5Ts.

18. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 1-17.

19. A communication device, characterized in that, The communication device includes at least one processor and a transceiver, the at least one processor and the transceiver being coupled to enable the communication device to implement the method as described in any one of claims 1-17.

20. A chip, characterized in that, The chip includes logic circuitry and an interface, the logic circuitry and the interface being coupled to enable the chip to implement the method as described in any one of claims 1-17.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which, when executed by a computer, performs the method as described in any one of claims 1-17.

22. A computer program product, characterized in that, When the computer program product is executed by a computer, the method described in any one of claims 1-17 is performed.

23. A communication system, characterized in that, The communication system includes a first device and a second device, the first device being configured to perform the method as described in any one of claims 1-2, 5, 7-17, and the second device being configured to perform the method as described in any one of claims 3-4, 6-17.

Images