Communication method and communication device

Abstract

This application relates to the communications field, and more particularly to a high-frequency channel configuration method and a communications device. This solution may be applied to a WLAN system supporting an 802.11 series protocol, such as 802.11be, Wi-Fi 7, or a next-generation Wi-Fi protocol such as IEEE 802.11ax (e.g., EHT). For another example, the next-generation Wi-Fi protocol or Wi-Fi 8 may be applied to an UWB-based wireless personal area network system or a sensing system. In the above-described method, information may be transmitted between stations on a first channel. Since the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an integer multiple of the subcarrier spacing, when using the channel, the station can determine the position of each subcarrier on the channel based on the channel's carrier center frequency rather than the DC carrier frequency. This avoids DC relative shifts, reducing the complexity and facilitating device implementation.

Description

[Technical Field]

[0001] This application claims priority to Chinese Patent Application No. 202211070965.9, entitled "COMMUNICATION METHOD AND COMMUNICATION APPARATUS," filed with the State Intellectual Property Office of China on September 2, 2022, the entire contents of which are incorporated herein by reference.

[0002] [Technical field] The present application relates to the field of communication technologies, and more particularly to communication methods and devices. [Background technology]

[0003] Wireless local area networks (WLANs) have been developed over several generations, including sub-7 GHz standards such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be, which are currently under discussion, as well as higher-frequency standards such as 802.11ad and 802.11ay, which operate near 60 GHz. Regarding the channel configuration of the higher-frequency standards, 802.11ad supports 2.16 GHz channels, while 802.11ay also supports 4.32 GHz, 6.48 GHz, 8.64 GHz, 2.16+2.16 GHz, and 4.32+4.32 GHz channels in addition to the 2.16 GHz channels.

[0004] Currently, subcarrier configurations in high frequency channels are relatively complex and not suitable for device implementation. Summary of the Invention

[0005] The present application provides a communication method and a communication device that can determine the position of each subcarrier on a channel based on the carrier center frequency of the channel rather than the DC carrier frequency, thereby reducing the complexity and facilitating device implementation.

[0006] According to a first aspect, a communication method is provided. The method may be performed by a first station or by a component (e.g., a chip, a circuit, or a module) configured in the first station, which is not limited in this application.

[0007] The method includes generating a physical layer protocol data unit (PPDU) and transmitting the PPDU on a first channel, the first channel being N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB = i channels, the first channel is adjacent to the second channel, N is a positive integer, and i is a positive integer.

[0008] Based on the above solution, information can be transmitted between stations on a first channel. Since the spacing between the carrier center frequencies of the first channel and the second channel is an integer multiple of the subcarrier spacing, when using the channel, stations can determine the position of each subcarrier on the channel based on the channel's carrier center frequency rather than the DC carrier frequency. This avoids DC relative shifts, reducing the complexity and facilitating device implementation.

[0009] With reference to the first aspect, in some implementations of the first aspect, the bandwidth of the PPDU is equal to or less than the channel width of the first channel.

[0010] It should be understood that the bandwidth of the PPDU is the bandwidth occupied by the data subcarriers, pilot subcarriers, and DC subcarriers on the first channel. In addition to the subcarriers within the bandwidth of the PPDU, there may be other subcarriers, such as guard subcarriers, or no other subcarriers on the first channel. This is not a limitation in this application. Therefore, the bandwidth of the PPDU may be equal to or less than the channel width.

[0011] The bandwidth of the PPDU depends on the performance of the spectrum profile.

[0012] Optionally, the method may be applied to a frequency band above 45 GHz, in other words, to a WLAN high frequency standard.

[0013] For example, the method may be applied to the directional multi-gigabit (DMG) standard, the enhanced directional multi-gigabit (EDMG) standard, the China directional multi-gigabit (CDMG) standard, or the China millimeter-wave multi-gigabit (CMMG) standard.

[0014] The above solution can avoid DC relative shift in the high frequency channel and reduce the complexity of the subcarrier configuration in the high frequency channel.

[0015] Optionally, the first width is the smallest channel width granularity, in other words, the first width is the smallest unit used for channel division.

[0016] For example, the first width is 2.16 GHz, or the first width is 80 MHz or 320 MHz.

[0017] Optionally, the value of i is one of 1, 2, 3, or 4.

[0018] For example, the carrier center frequency of the first channel is 45 GHz or higher.

[0019] Referring to the first aspect, in some implementations of the first aspect, N is a product of M elements in a first set of real numbers, where M is a positive integer, and the first set of real numbers is a set consisting of factors obtained by performing factorization based on a first value X, where X=|f c1 -f c2 | and f c1 is the carrier center frequency of the first channel, and f c2 is the carrier center frequency of the second channel, or X=first width*number of sampling points*10^n, where n is an integer.

[0020] For example, the M elements include only odd numbers, or the M elements include at least one even number.

[0021] The value of n can be n=0, 1, 2, 3, . . .

[0022] Optionally, all elements in the first set of real numbers are prime numbers.

[0023] Based on the above solution, the subcarrier spacing value can also be an integer in Hz or MHz, which facilitates device implementation.

[0024] Referring to the first aspect, in some implementations of the first aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

[0025] Based on the above solution, since the frequency spacing between the carrier center frequencies of two adjacent channels is an odd multiple of the OFDM subcarrier spacing, the subcarrier configuration may be performed in a symmetric manner based on the carrier center frequency, which is simple and easy to implement.

[0026] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 3.2 MHz, 3.456 MHz, 5.75 MHz, 9.6 MHz, 16 MHz, and 17.28 MHz.

[0027] Referring to the first aspect, in some implementations of the first aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

[0028] Based on the above solution, since the frequency interval between the carrier center frequencies of two adjacent channels is an even multiple of the OFDM subcarrier interval, the carrier center frequency can be used as the DC carrier frequency for all channels, and no DC relative shift is required, which reduces the implementation complexity.

[0029] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 4.21875 MHz, 4.32 MHz, 5.625 MHz, 5.4 MHz, 6.75 MHz, 7.5 MHz, 8.4375 MHz, 8.64 MHz, and 10.8 MHz.

[0030] Referring to the first aspect, in some implementation forms of the first aspect, the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel, or the spacing between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier spacing.

[0031] Referring to the first aspect, in some implementations of the first aspect, the third channel is N CB =i+1, and the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing.

[0032] Specifically, the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel can be an odd or even multiple of the subcarrier spacing.

[0033] Referring to the first aspect, in some implementation forms of the first aspect, one subcarrier of the third channel and one subcarrier of the first channel have the same frequency position.

[0034] Based on the above solution, the subcarriers on the third channel and the first channel may have the same frequency position, which can reduce the difference between the subcarrier configurations on different channels, which is more suitable for device implementation.

[0035] According to a second aspect, a communication method is provided. The method may be performed by a second station or by a component (e.g., a chip, circuit, or module) configured in the second station, which is not limited in this application.

[0036] The method includes receiving a physical layer protocol data unit (PPDU) on a first channel, the first channel being N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB = i channels, the first channel being adjacent to the second channel, N being a positive integer, and i being a positive integer; and parsing the PPDU.

[0037] Referring to the second aspect, in some implementation forms of the second aspect, the bandwidth of the PPDU is equal to or less than the channel width of the first channel.

[0038] Optionally, the method may be applied to frequency bands above 45 GHz.

[0039] For example, the method may be applied to the directional multi-gigabit standard, the extended directional multi-gigabit standard, the Chinese directional multi-gigabit standard, or the Chinese millimeter wave multi-gigabit standard.

[0040] Optionally, the first width is the smallest channel width granularity, in other words, the first width is the smallest unit used for channel division.

[0041] For example, the first width is 2.16 GHz, or the first width is 80 MHz.

[0042] Optionally, the value of i is one of 1, 2, 3, or 4.

[0043] For example, the carrier center frequency of the first channel is 45 GHz or higher.

[0044] Referring to the second aspect, in some implementations of the second aspect, N is a product of M elements in a first set of real numbers, where M is a positive integer, and the first set of real numbers is a set consisting of factors obtained by performing factorization based on a first value X, where X=|f c1 -f c2 | and f c1 is the carrier center frequency of the first channel, and f c2 is the carrier center frequency of the second channel, or X=first width*number of sampling points*10^n, where n is an integer.

[0045] For example, the M elements include only odd numbers, or the M elements include at least one even number.

[0046] The value of n can be n=0, 1, 2, 3, . . .

[0047] Referring to the second aspect, in some implementations of the second aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

[0048] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 3.2 MHz, 3.456 MHz, 5.75 MHz, 9.6 MHz, 16 MHz, and 17.28 MHz.

[0049] Referring to the second aspect, in some implementations of the second aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

[0050] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 4.21875 MHz, 4.32 MHz, 5.625 MHz, 5.4 MHz, 6.75 MHz, 7.5 MHz, 8.4375 MHz, 8.64 MHz, and 10.8 MHz.

[0051] Referring to the second aspect, in some implementation forms of the second aspect, the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel, or the spacing between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier spacing.

[0052] Referring to the second aspect, in some implementations of the second aspect, the third channel is N CB =i+1, and the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing.

[0053] Specifically, the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel can be an odd or even multiple of the subcarrier spacing.

[0054] Referring to the second aspect, in some implementation forms of the second aspect, one subcarrier of the third channel and one subcarrier of the first channel have the same frequency position.

[0055] The beneficial effects of the second aspect and implementations of the second aspect are understood to refer to the first aspect and implementations of the first aspect.

[0056] According to a third aspect, there is provided a communication device. The device may be a first station or a component (e.g., a chip, a circuit, or a module) configured in the first station. This is not a limitation in the present application.

[0057] The apparatus includes a processing unit configured to generate a physical layer protocol data unit (PPDU), and a transceiver unit configured to transmit the PPDU on a first channel, the first channel being N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB = i channels, the first channel being adjacent to the second channel, N being a positive integer, and i being a positive integer.

[0058] With reference to the third aspect, in some implementations of the third aspect, the bandwidth of the PPDU is equal to or less than the channel width of the first channel.

[0059] Optionally, the device may support frequency bands above 45 GHz.

[0060] For example, the device may support the Directional Multi-Gigabit Standard, the Extended Directional Multi-Gigabit Standard, the China Directional Multi-Gigabit Standard, or the China Millimeter-Wave Multi-Gigabit Standard.

[0061] Optionally, the first width is the smallest channel width granularity, in other words, the first width is the smallest unit used for channel division.

[0062] For example, the first width is 2.16 GHz, or the first width is 80 MHz.

[0063] Optionally, the value of i is one of 1, 2, 3, or 4.

[0064] For example, the carrier center frequency of the first channel is 45 GHz or higher.

[0065] Referring to the third aspect, in some implementations of the third aspect, N is a product of M elements in a first set of real numbers, where M is a positive integer, and the first set of real numbers is a set consisting of factors obtained by performing factorization based on a first value X, where X=|f c1 -f c2 | and f c1 is the carrier center frequency of the first channel, and f c2 is the carrier center frequency of the second channel, or X=first width*number of sampling points*10^n, where n is an integer.

[0066] For example, the M elements include only odd numbers, or the M elements include at least one even number.

[0067] The value of n can be n=0, 1, 2, 3, . . .

[0068] With reference to the third aspect, in some implementations of the third aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

[0069] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 3.2 MHz, 3.456 MHz, 5.75 MHz, 9.6 MHz, 16 MHz, and 17.28 MHz.

[0070] With reference to the third aspect, in some implementations of the third aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

[0071] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 4.21875 MHz, 4.32 MHz, 5.625 MHz, 5.4 MHz, 6.75 MHz, 7.5 MHz, 8.4375 MHz, 8.64 MHz, and 10.8 MHz.

[0072] With reference to the third aspect, in some implementation forms of the third aspect, the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel, or the spacing between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier spacing.

[0073] Referring to the third aspect, in some implementations of the third aspect, the third channel is N CB =i+1, and the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing.

[0074] Specifically, the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel can be an odd or even multiple of the subcarrier spacing.

[0075] Referring to the third aspect, in some implementation forms of the third aspect, one subcarrier of the third channel and one subcarrier of the first channel have the same frequency position.

[0076] It should be understood that the beneficial effects of the third aspect and implementations of the third aspect refer to the first aspect and implementations of the first aspect.

[0077] According to a fourth aspect, there is provided a communication device. The device may be a second station or a component (e.g., a chip, a circuit, or a module) configured in the second station. This is not a limitation in the present application.

[0078] The apparatus includes a transceiver unit configured to receive physical layer protocol data units (PPDUs) on a first channel, the first channel comprising N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB =i channels, the first channel being adjacent to the second channel, N being a positive integer, and i being a positive integer; and a processing unit configured to analyze the PPDU.

[0079] With reference to the fourth aspect, in some implementation forms of the fourth aspect, the bandwidth of the PPDU is equal to or less than the channel width of the first channel.

[0080] Optionally, the device may support frequency bands above 45 GHz.

[0081] For example, the device may support the Directional Multi-Gigabit Standard, the Extended Directional Multi-Gigabit Standard, the China Directional Multi-Gigabit Standard, or the China Millimeter-Wave Multi-Gigabit Standard.

[0082] Optionally, the first width is the smallest channel width granularity, in other words, the first width is the smallest unit used for channel division.

[0083] For example, the first width is 2.16 GHz, or the first width is 80 MHz.

[0084] Optionally, the value of i is one of 1, 2, 3, or 4.

[0085] For example, the carrier center frequency of the first channel is 45 GHz or higher.

[0086] Referring to the fourth aspect, in some implementations of the fourth aspect, N is a product of M elements in a first set of real numbers, M is a positive integer, and the first set of real numbers is a set consisting of factors obtained by performing factorization based on a first value X, where X=|f c1 -f c2 | and f c1 is the carrier center frequency of the first channel, and f c2 is the carrier center frequency of the second channel, or X=first width*number of sampling points*10^n, where n is an integer.

[0087] For example, the M elements include only odd numbers, or the M elements include at least one even number.

[0088] The value of n can be n=0, 1, 2, 3, . . .

[0089] With reference to the fourth aspect, in some implementations of the fourth aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

[0090] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 3.2 MHz, 3.456 MHz, 5.75 MHz, 9.6 MHz, 16 MHz, and 17.28 MHz.

[0091] With reference to the fourth aspect, in some implementations of the fourth aspect, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

[0092] For example, the first width is 2.16 GHz, and the subcarrier spacing value is one of 4.21875 MHz, 4.32 MHz, 5.625 MHz, 5.4 MHz, 6.75 MHz, 7.5 MHz, 8.4375 MHz, 8.64 MHz, and 10.8 MHz.

[0093] With reference to the fourth aspect, in some implementation forms of the fourth aspect, the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel, or the spacing between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier spacing.

[0094] Referring to the fourth aspect, in some implementations of the fourth aspect, the third channel is N CB =i+1, and the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing.

[0095] Specifically, the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel can be an odd or even multiple of the subcarrier spacing.

[0096] With reference to the fourth aspect, in some implementation forms of the fourth aspect, one subcarrier of the third channel and one subcarrier of the first channel have the same frequency position.

[0097] It should be understood that the beneficial effects of the fourth aspect and implementations of the fourth aspect refer to the first aspect and implementations of the first aspect.

[0098] According to a fifth aspect, there is provided a communications device. The device includes a processor configured to invoke and execute a computer program stored in a memory to control a transceiver to receive and transmit signals, thereby causing the communications device to perform a method according to any one of the first and second aspects or any possible implementation of these aspects. Optionally, the communications device may further include a memory configured to store the computer program. The communications device may further include a transceiver.

[0099] According to a sixth aspect, there is provided a communication device including a processor. The processor is configured to process data and / or information, thereby performing a method according to any one of the first and second aspects or any possible implementations of these aspects. Optionally, the communication device may further include a communication interface. The communication interface is configured to receive the data and / or information and transmit the received data and / or information to the processor. Optionally, the communication interface is further configured to output the data and / or information processed by the processor.

[0100] According to a seventh aspect, there is provided a chip including a processor. The processor is configured to execute a program or instruction, thereby causing the chip to perform a method according to any one of the first and second aspects or any possible implementation of these aspects. Optionally, the chip may further include a memory, the memory configured to store the program or instruction. Optionally, the chip may further include a transceiver.

[0101] According to an eighth aspect, there is provided a computer-readable storage medium storing computer instructions, the computer instructions being used to implement a method according to any one of the first and second aspects or any possible implementation of these aspects.

[0102] According to a ninth aspect, there is provided a computer program product, the computer program product comprising computer program code, the computer program code being used to implement a method according to any one of the first and second aspects or any possible implementation of any one of these aspects.

[0103] According to a tenth aspect, there is provided a wireless communication system including a communication device according to the third and fourth aspects. [Brief explanation of the drawings]

[0104] [Figure 1] 1 is a diagram of an application scenario in which an embodiment of the present application is applicable; [Figure 2] 1 illustrates a communication device according to the present application. [Figure 3] FIG. 1 is a diagram showing a channel configuration in a high frequency standard. [Figure 4] A diagram of 2.16+2.16 GHz (aggregated) channels and 4.32 GHz (non-aggregated) channels. [Figure 5] FIG. 1 is a diagram of channel distribution. [Figure 6] 2 is a schematic flowchart of a communication method 200 according to an embodiment of the present application. [Figure 7] FIG. 2 is a diagram of a channel distribution according to an embodiment of the present application. [Figure 8] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 9] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 10] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 11] 3 is a schematic flowchart of a communication method 300 according to an embodiment of the present application. [Figure 12] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 13]FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 14] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. [Figure 15] 1 is a diagram of a communication device according to an embodiment of the present application. [Figure 16] FIG. 2 is another diagram of the structure of a communication device according to an embodiment of the present application. [Figure 17] FIG. 2 is another diagram of the structure of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0105] The technical solutions of the present application are described below with reference to the accompanying drawings.

[0106] The technical solutions provided in the embodiments of the present application are applicable to wireless local area network (WLAN) scenarios. For example, IEEE 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, next-generation Wi-Fi protocols such as IEEE 802.11ax, Wi-Fi 7, extremely high throughput (EHT), 802.11ad, 802.11ay, or 802.11bf-related standards are supported. In another example, next-generation protocols such as 802.11be or Wi-Fi 8 are supported. The technical solutions provided in the embodiments of the present application may be applied to ultra-wideband (UWB)-based wireless personal area network systems, such as 802.15 series standards, or sensing systems, such as 802.11bf series standards. The 802.11n standard is called high throughput (HT), the 802.11ac standard is called very high throughput (VHT), the 802.11ax standard is called high efficiency (HE), and the 802.11be standard is called extremely high throughput (EHT).

[0107] Although the embodiments of the present application are mainly described by using an example in which a WLAN network, particularly a network to which the IEEE 802.11 system standard is applied, those skilled in the art will readily understand that various aspects of the embodiments of the present application can be extended to other networks using various standards or protocols, such as a high performance radio local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks known or developed in the future. Therefore, various aspects provided in the embodiments of the present application can be applied to any suitable wireless network, regardless of the coverage area and wireless access protocol used.

[0108] The technical solutions in the embodiments of the present application may further be applied to various communication systems, such as a WLAN communication system, a wireless fidelity (Wi-Fi) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a universal mobile telecommunications system (UMTS), a worldwide interoperability for microwave access (WiMax) communication system, a fifth generation (5G) system or new radio (NR), a future sixth generation (6G) system, an internet of things (IoT) network, or a vehicle-to-everything (V2X) system.

[0109] The above-mentioned communication systems applicable to the present application are merely examples for explanation, and the communication systems applicable to the present application are not limited thereto, which are uniformly described in this specification, and the details will not be described again below.

[0110] FIG. 1 is a diagram of an application scenario to which an embodiment of the present application can be applied. As shown in FIG. 1, the resource configuration method provided in the present application is applicable to data communication between stations (STAs). The stations may be access point (AP) stations or non-access point stations (non-AP STAs). The access point station and the non-access point station are simply referred to as AP and non-AP station, respectively. Specifically, the solution in the present application is applicable to data communication between an AP and one or more non-AP stations (e.g., data communication between AP1 and non-AP STA1, and between AP1 and non-AP STA2), data communication between APs (e.g., data communication between AP1 and AP2), and data communication between non-AP STAs and non-AP STAs (e.g., data communication between non-AP STA2 and non-AP STA3).

[0111] An access point may be an access point used by a terminal (such as a mobile phone) to access a wired (or wireless) network, and is mainly located in homes, buildings, and parks. A conventional coverage radius is tens to hundreds of meters. Of course, an access point may alternatively be located outdoors. An access point corresponds to a bridge connecting a wired network and a wireless network. The main function of an access point is to connect various wireless network clients together and then connect the wireless network to an Ethernet.

[0112] Specifically, the access point may be a terminal or a network device having a Wi-Fi chip. The network device may be a server, a router, a switch, a bridge, a computer, a mobile phone, a relay station, an in-vehicle device, a wearable device, a network device in a 5G network, a network device in a future 6G network, a network device in a public land mobile network (PLMN), etc. This is not limited in the embodiments of the present application. The access point may be a device that supports a Wi-Fi standard. For example, the access point may also support one or more standards of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0113] A non-AP station may be a wireless communication chip, a wireless sensor, a wireless communication terminal, etc., and may also be referred to as a user, user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile console, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. A non-AP station may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, another processing device connected to a wireless modem, an in-vehicle device, an Internet of Things device, a wearable device, a terminal device in a 5G network, a terminal device in a future 6G network, a terminal device in a PLMN, etc. This is not limited in the embodiments of the present application. A non-AP station may be a device that supports a WLAN standard. For example, a non-AP station may support one or more standards of the IEEE 802.11 family, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0114] For example, a non-AP station may be a mobile phone, a tablet computer, a set-top box, a smart television, a smart wearable device, an in-vehicle communication device, a computer, an Internet of Things (IoT) node, a sensor, a smart camera, a smart remote control, or a sensor in a smart home or smart city such as a smart water meter.

[0115] The AP or non-AP station may include a transmitter, a receiver, a memory, a processor, etc. The transmitter and receiver are configured to transmit and receive packet structures, respectively. The memory is configured to store signaling information, pre-agreed preset values, etc. The processor is configured to analyze the signaling information, process associated data, etc.

[0116] For example, Figure 2 illustrates a communication device according to the present application. The device illustrated in Figure 2 may be an AP or a non-AP station. A medium access control (MAC) layer processing module, a physical (PHY) layer processing module, a radio frequency / antenna, etc. are configured to implement the relevant functions of the transmitter and receiver described above. As illustrated in Figure 2, in addition to the MAC layer processing module, the PHY layer processing module, the radio frequency / antenna, the memory, and the processor, the device may further include a controller and a scheduler.

[0117] It should be understood that Figure 2 is merely an example of an apparatus provided in the present application and does not constitute a limitation to the present application. For example, an apparatus may not include a controller and / or a scheduler.

[0118] Since the development of wireless local area networks (WLANs), stations can communicate with each other by using orthogonal frequency division multiplexing (OFDM) technology. In OFDM technology, frequency domain resources are divided into several sub-resources, and each sub-resource in the frequency domain is called a subcarrier. A subcarrier can also be understood as the smallest granularity of a frequency domain resource, and the frequency difference between adjacent subcarriers is called a subcarrier spacing. The solution of the present application can be applied to a system using OFDM technology.

[0119] WLAN has developed through several generations of standards, including sub-7 GHz standards such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, and 802.11be, which are currently under discussion, as well as higher frequency standards such as 802.11ad and 802.11ay, which operate around 60 GHz.

[0120] The 802.11n standard is called high throughput (HT), the 802.11ac standard is called very high throughput (VHT), the 802.11ax standard is called high efficiency (HE), the 802.11be standard is called extremely high throughput (EHT), the 802.11ad standard is called directional multi-gigabit (DMG), and the 802.11ay standard is called enhanced directional multi-gigabit (EDMG).

[0121] Regarding the channel configuration of the low-frequency standard, 802.11ax currently supports the following channel configurations: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 80+80 MHz. The difference between a 160 MHz channel and an 80+80 MHz channel is that the former is a contiguous frequency band, while the latter may have two 80 MHz channels separated. 802.11be only supports contiguous channels, including 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz channels.

[0122] Regarding the channel configuration of the high frequency standards, 802.11ad supports 2.16GHz channels, and 802.11ay supports more 2.16GHz channels, as well as 4.32GHz, 6.48GHz, 8.64GHz, 2.16+2.16GHz, and 4.32+4.32GHz channels.

[0123]

[0003] Figure 3 is a diagram of the channel configuration in the high-frequency standard. As shown in Figure 3, the channel numbers supported by 802.11ad are #1, #2, #3, and #4, and the channel numbers supported by 802.11ay are #1 to #29, where channel numbers #1 to #29 are sometimes referred to as channel identifiers 1 to 29. In Figure 3, channel indexes represent different frequency values, and the frequency values ​​represented by channel indexes 0 to 16 are 57.24 GHz, 58.32 GHz, 59.4 GHz, 60.48 GHz, 61.56 GHz, 62.64 GHz, 63.72 GHz, 64.8 GHz, 65.88 GHz, 66.96 GHz, 68.04 GHz, 69.12 GHz, 70.2 GHz, 71.28 GHz, 72.36 GHz, 73.44 GHz, and 74.52 GHz, respectively. The difference between two adjacent frequency positions is 1.08 GHz.

[0124] Additionally, in FIG. 3, #1, #2, ..., #29 represent channel numbers for channel identification, with #1 to #8 being 2.16 GHz channels, #9 to #15 being 4.32 GHz channels, #17 to #22 being 6.48 GHz channels, and #25 to #29 being 8.64 GHz channels. Currently, the channel numbers supported by the 802.11ad standard are #1, #2, #3, and #4, and the channel numbers supported by the 802.11ay standard are #1 to #29. The channel width of each channel means the frequency difference between the start frequency and end frequency of the channel. The frequency center of each channel is the carrier center frequency (f c) The carrier center frequency of channel #1 can be calculated using the following formula: 0.5 × (channel start frequency + channel end frequency). For example, the start frequency of channel #1 is the frequency of channel index = 0, i.e., 57.24 GHz, and the end frequency of channel #1 is the frequency of channel index = 2, i.e., 59.4 GHz. Therefore, the carrier center frequency of channel #1 is the frequency of channel index = 1, i.e., 58.32 GHz. In another example, the start frequency of channel #19 is the frequency of channel index = 4, i.e., 61.56 GHz, and the end frequency of channel #19 is the frequency of channel index = 10, i.e., 68.04 GHz. Therefore, the carrier center frequency of channel #19 is the frequency of channel index = 7, i.e., 64.8 GHz. The frequency difference between the carrier center frequencies of any two channels is called the spacing between the carrier center frequencies of the two channels.

[0125] Based on the aforementioned channels, there may also be aggregated channels consisting of two or more channels within channels #1 to #29, such as a 2.16+2.16 GHz channel or a 4.32+4.32 GHz channel.

[0126] All the aforementioned channels except the 2.16 GHz channel can be obtained by using the 2.16 GHz channel. For example, channels #1 to #8 are represented by 8 bits in ascending frequency order. A bit is set to 1 to indicate the corresponding channel is occupied.

[0127] A 4.32 GHz channel may be represented as 11000000, 01100000, 00110000, 00011000, 00001100, 00000110, or 00000011.

[0128] A 6.48 GHz channel may be represented as 11100000, 01110000, 00111000, 00011100, 00001110, or 00000111.

[0129] The 8.64 GHz channel may be represented as 11110000, 01111000, 00111100, 00011110, or 00001111.

[0130] The 2.16+2.16 GHz channels may be represented as 11000000, 10100000, 10010000, 01100000, 00101000, ...

[0131] The 4.32+4.32 GHz channels may be, for example, 11110000, 11011000, 11001100, 01101100, 01111000, ...

[0132] From the above description, it can be seen that the 4.32 GHz and 2.16+2.16 GHz channels used as examples both occupy two 2.16 GHz channels but are different. Specifically, the 2.16+2.16 GHz channel can be understood as two independent (or sometimes called non-aggregated) 2.16 GHz channels, while the 4.32 GHz channel is one larger contiguous channel formed by aggregating two 2.16 GHz channels, and is referred to in the standard as a non-aggregated channel or bonded channel. Because the 2.16+2.16 GHz channel is a channel formed by two independent 2.16 GHz channels, this channel does not need to be constrained to be "connected," which means that there are two consecutive bits set to 1 in the aforementioned 8 bits. The 4.32 GHz channels need to be constrained to be "connected" in order to form one larger bonded channel. The relationship between the 8.64 GHz channel and the 4.32+4.32 GHz channel is similar to the principle described above: the 8.64 GHz channel is called a non-aggregated channel, while the 4.32+4.32 GHz channel is called an aggregated channel, formed by aggregating two independent 4.32 GHz channels.

[0133] The following describes the differences between aggregated and non-aggregated channels used in 802.11ay.

[0134] In 802.11ay, the supported non-aggregated channels are shown in Table 1. [Table 1] TIFF2025527889000003.tif189170

[0135] In 802.11ay, the supported 2.16+2.16GHz aggregate channels are shown in Table 2. [Table 2] TIFF2025527889000005.tif161170

[0136] In 802.11ay, the supported 4.32+4.32GHz aggregate channels are shown in Table 3. [Table 3] TIFF2025527889000007.tif188170

[0137] In the following, we use a 2.16+2.16 GHz (aggregated) channel and a 4.32 GHz (non-aggregated) channel as an example to explain in detail the difference between subcarrier distributions within the channel when the channel width is the same.

[0138] Figure 4 shows diagrams of a 2.16+2.16 GHz (aggregated) channel and a 4.32 GHz (non-aggregated) channel. Figure 4(a) shows a diagram of a 2.16+2.16 GHz channel, and Figure 4(b) shows a diagram of a 4.32 GHz channel. In Figure 4, the dashed lines represent carrier center frequencies, and the shaded areas can be considered as ranges where data subcarriers, pilot subcarriers, and DC subcarriers are located. In this application, the bandwidth occupied by the data subcarriers, pilot subcarriers, and DC subcarriers on a channel is referred to as the physical layer protocol data unit (PPDU) bandwidth or PPDU bandwidth, and the total number of data subcarriers, pilot subcarriers, and DC subcarriers is referred to as the number of subcarriers. As shown in Figure 4, with regard to the PPDU bandwidth, the PPDU bandwidth in the 2.16+2.16GHz channel includes the PPDU bandwidth of two independent 2.16GHz channels, while in the 4.32GHz channel, the two consecutive 2.16GHz channels are considered as a whole, taking into account the subcarrier distribution.

[0139] The standard uses N to describe the size of a contiguous channel. CB is equal to 1, 2, 3, or 4, and N CB It should be understood that N represents the number of contiguous 2.16 GHz channels. CB When is 1, it indicates a 2.16GHz channel or a 2.16+2.16GHz channel, and N CB When is 2, it indicates 4.32GHz channel or 4.32+4.32GHz channel, and N CB When is 3, it indicates the 6.48GHz channel, and N CB A value of 4 indicates the 8.64 GHz channel. CB The PPDU bandwidth configurations for channels where is equal to 1, 2, 3, or 4 are shown in Table 4. [Table 4]

[0140] In Table 5, the subcarrier frequency spacing ΔF, sometimes abbreviated as subcarrier spacing, is represented by Δf.

[0141] Note that in a channel, in addition to the subcarriers in the PPDU bandwidth, there may be other subcarriers, such as guard subcarriers. These subcarriers are located in the blank areas of Figure 4. Due to performance limitations of the spectral profile, these subcarriers cannot currently be used as part of the PPDU bandwidth. Therefore, the bandwidth of the PPDU may be less than or equal to the channel width.

[0142] From Table 4, we can see that the number of subcarriers in the 2.16 GHz channel is 355, and the number of subcarriers in the 4.32 GHz channel is 773. The reason the 2.16 GHz channel has 335 subcarriers is because, for the 2.16 GHz channel, there are 177 DC+Data+Pilot subcarriers (1+177*2=355) on either side of the center DC subcarrier of the three DC subcarriers. The reason the 4.32 GHz channel has 773 subcarriers is because, for the 4.32 GHz channel, there are 386 DC+Data+Pilot subcarriers (1+386*2=773) on either side of the center DC subcarrier of the three DC subcarriers. However, the number of subcarriers in the 2.16+2.16 GHz channel is 710. Referring to Figure 4, the number of subcarriers in the 4.32 GHz channel is greater than the number of subcarriers in the 2.16+2.16 GHz channel because two consecutive 2.16 GHz channels are considered as a whole and the subcarrier distribution in the 4.32 GHz channel is taken into account. As shown in Figure 4, the shaded area in Figure 4(b) is greater than the shaded area in Figure 4(a).

[0143] However, the set including the data subcarriers, pilot subcarriers, and DC subcarriers of the 2.16+2.16 GHz channel is not a subset of the set including the data subcarriers, pilot subcarriers, and DC subcarriers of the 4.32 GHz channel. An explanation is provided below with reference to FIG. 5.

[0144] Figure 5 shows the channel distribution. As shown in Figure 5, the shaded area indicates the N CB = 1. Since a direct current (DC) subcarrier is generally located at the center of any PPDU bandwidth, in this application, the frequency of the subcarrier located at the center of the PPDU bandwidth is defined as the DC carrier frequency (f DC), and the DC carrier frequency of the PPDU is the DC carrier frequency of the channel in which the PPDU bandwidth is located, and is sometimes referred to as the DC carrier frequency of the channel. The frequency difference between the DC carrier frequencies of any two channels is referred to as the spacing between the DC carrier frequencies of the two channels. Similarly, the frequency difference between the DC carrier frequency of channel #A and the carrier center frequency of channel #B is referred to as the spacing between the DC carrier frequency of channel #A and the carrier center frequency of channel #B. As shown in Figure 5, Δf represents the subcarrier spacing. The thin dashed line is the carrier center frequency of the 2.16 GHz channel, the thin solid line is the DC carrier frequency of the 2.16 GHz channel, the thick dashed line is the carrier center frequency of the 4.32 GHz channel, and the thick solid line is the DC carrier frequency of the 4.32 GHz channel. The spacing between the carrier center frequencies of two adjacent 2.16 GHz channels is 1.08 GHz, which is 419 times the subcarrier spacing Δf. From Table 4, we can see that the subcarrier spacing is 5.15625 MHz. Therefore, the spacing between the DC carrier frequencies of two adjacent 2.16 GHz channels is 2.16046875 GHz. From Figure 5, we can see that there is a spacing between the carrier center frequencies of the 2.16 GHz channels numbered #1 to #3 and the DC carrier frequency, but the carrier center frequency of the 2.16 GHz channel numbered #4 is the same as the DC carrier frequency.

[0145] Analysis of 2.16 GHz channels in 802.11ay shows that for a given OFDM sampling frequency of 2.64 GHz and a subcarrier spacing of 5.15625 MHz, since the carrier center frequency spacing between two adjacent channels is not an integer multiple of the OFDM subcarrier spacing, in a continuous channel such as 4.32 GHz, it is difficult to keep the respective subcarrier frequencies of two participating 2.16 GHz channels aligned, no matter how the subcarriers are selected. The spacing between the carrier center frequency of any channel and the DC carrier frequency is called the DC relative shift. Different N CB To ensure that the subcarrier frequencies of channels corresponding to 4.32 GHz are aligned, the subcarriers are configured by using a DC relative shift rather than the 2.16 GHz carrier center frequency. By using a DC relative shift, each subcarrier frequency of each channel identifier can be expressed as 64.8 + ΔF × n GHz, where n is an integer. This ensures that the spacing between the DC carrier frequencies of every two 2.16 GHz channels is an integer multiple of the OFDM subcarrier spacing. In addition, channels above 4.32 GHz are aligned with the 2.16 GHz channels in terms of subcarrier frequency. Table 5 shows the DC relative shifts for different channels in 802.11ay. [Table 5]

[0146] From Table 5, we can see that most channels in 802.11ay have DC relative shifts, and the DC relative shifts of different channels are different. Therefore, when using a channel, a station must first determine the DC carrier frequency based on the channel's carrier center frequency and the DC relative shifts in Table 5, and then determine the frequency of each subcarrier on the channel based on the DC carrier frequency.

[0147] The above uses the PPDU bandwidths of 2.16+2.16 GHz and 4.32 GHz channels as illustrative examples, which also apply to other channels such as 4.32+4.32 GHz and 6.48 GHz.

[0148] In conclusion, the current subcarrier configuration in the channel requires DC relative shifts to be configured, and the subcarrier configuration must be performed using the DC relative shifts. When determining the position of each subcarrier, the station needs not only the carrier center frequency but also the DC carrier frequency. This is relatively complicated and not suitable for device implementation.

[0149] In view of this, the present application provides a communication method and a communication device that enable the position of each subcarrier on a channel to be determined based on the carrier center frequency of the channel rather than the DC carrier frequency, thereby reducing the complexity of the subcarrier configuration and facilitating device implementation.

[0150] 6 is a schematic flowchart of a communication method 200 according to an embodiment of the present application. For some concepts or descriptions of the method 200, please refer to FIGS. 1 to 5. The communication method 200 uses communication between a first station and a second station as an example.

[0151] S210: The first station generates a physical layer protocol data unit (PPDU).

[0152] The first station may be an AP or a non-AP STA, which is not limited in this application.

[0153] The PPDU generated by the first station may be a PPDU in a Wi-Fi protocol. For example, the PPDU generated by the first station may be a PPDU in the 802.11ad standard and may be referred to as a DMG PPDU. In another example, the PPDU generated by the first station may be a PPDU in the 802.11ay standard and may be referred to as an EDMG PPDU. Wi-Fi protocols include standards such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay, as well as standards for next-generation Wi-Fi protocols.

[0154] S220: The first station transmits a PPDU to the second station on the first channel, and in response, the second station receives the PPDU on the first channel.

[0155] The second station may be an AP or a non-AP STA, which is not limited in this application.

[0156] The first channel is N CB = i channel, N CB is the number of consecutive channels of the first width. In other words, the first channel includes one or more consecutive channels of first width *i, where i can be a positive integer. For example, the value of i can be any one of 1, 2, 3, 4, 5, 6, 7, or 8. The first width can be any channel width.

[0157] Optionally, the first channel may be a non-aggregated channel or an aggregated channel.

[0158] For example, if the first width is 2.16 GHz, CB If N = 1, the first channel may include one or more contiguous 2.16 GHz channels. In other words, the first channel may be a 2.16 GHz channel or a 2.16+2.16 GHz channel. In another example, the first width is 2.16 GHz and NCB If N = 2, the first channel may include one or more contiguous 4.32 GHz channels. In other words, the first channel may be a 4.32 GHz channel or a 4.32+4.32 GHz channel. In yet another example, the first width is 80 MHz and N CB If ≠ 4, the first channel may include one or more contiguous 320 MHz channels. In other words, the first channel may be a 320 MHz channel or a 320+320 MHz channel.

[0159] Specifically, the first width may be the minimum channel width granularity. In other words, the first width is the minimum channel width. In other words, the first width is the smallest unit used for channel division, into which the entire frequency band may be divided. For example, as shown in FIG. 3, the entire frequency band is a high-frequency band above 56.16 GHz, and channel division is performed by using 2.16 GHz as the smallest unit. In this case, the first width is 2.16 GHz. In another example, for the high-frequency band above 56.16 GHz, channel division is performed by using 80 MHz, 160 MHz, 320 MHz, 640 MHz, 1280 MHz, 2560 MHz, etc. as the smallest unit. In this case, the first width is 80 MHz, 160 MHz, 320 MHz, 640 MHz, 1280 MHz, or 2560 MHz.

[0160] It should be understood that the above is just an example, and the value of the first width is not limited in this application.

[0161] The second channel is also N CB = i channels, where the first channel is adjacent to the second channel.

[0162] Optionally, the second channel may be a non-aggregated channel or an aggregated channel.

[0163] 3 is used as an example to explain the first and second channels. For example, if the first width is 2.16 GHz and N CB = 1 and the first channel is channel #1, the second channel may be channel #2. In another example, the first width is 2.16 GHz and N CB In another example, if the first width is 2.16 GHz and N CB In another example, if the first width is 2.16 GHz and N CB = 2 and the first channel is channel #11, the second channel may be channel #9 or channel #12.

[0164] Additionally, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, where N is a positive integer. The spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an integer multiple of the subcarrier spacing.

[0165] It should be understood that when either the first channel or the second channel is an aggregated channel, the carrier center frequency of the first channel and the carrier center frequency of the second channel are the carrier center frequencies of the independent channels that form the aggregated channel.

[0166] Continuing to use FIG. 3 as an example to explain the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel, for example, if the first width is 2.16 GHz and N CB= 1, the first channel is channel #1, and the second channel is channel #2, the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is the frequency interval between channel #1 and channel #2. In another example, the first width is 2.16 GHz, and N CB = 1, the first channel is #1 + #2 channels, and the second channel is #3 + #4 channels, the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is the frequency interval between #1 channel and #3 channel or the frequency interval between #2 channel and #4 channel. In another example, the first width is 2.16 GHz, and N CB = 1, the first channel is #1 + #3 channels, and the second channel is #2 + #4 channels, the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is the frequency interval between #1 channel and #2 channel or the frequency interval between #3 channel and #4 channel. In another example, the first width is 2.16 GHz, and N CB = 1, the first channel is #1+#3 channel, and the second channel is #4 channel, the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is the frequency interval between #1 channel and #4 channel or the frequency interval between #3 channel and #4 channel. In another example, the first width is 2.16 GHz, and N CB = 2, the first channel is channel #11, and the second channel is channel #9 or #13, the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is the frequency interval between channels #9 and #11 or the frequency interval between channels #11 and #13.

[0167] Optionally, the entire frequency band is evenly divided by using the first bandwidth as a granularity, and the subcarrier spacing is a fixed value. In this case, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel may be equal to the first width. In this case, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing. In other words, the first width is N times the subcarrier spacing.

[0168] Based on the solution in the above embodiment, a first station and a second station can transmit information on a first channel. Since the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an integer multiple of the subcarrier interval, when using the channel, the stations can determine the position of each subcarrier on the channel based on the carrier center frequency of the channel rather than the DC carrier frequency. This avoids DC relative shift, reducing the complexity and facilitating device implementation.

[0169] Optionally, the method further includes: S230: The second station parses the PPDU.

[0170] For example, the second station's parsing of the PPDU may be parsing the data carried in the PPDU.

[0171] Optionally, the width of the PPDU is less than or equal to the width of the first channel.

[0172] Specifically, the bandwidth of a PPDU is the bandwidth occupied by the data subcarriers, pilot subcarriers, and DC subcarriers on the channel. The bandwidth of a PPDU depends on the spectral profile and may be close to or equal to the width of the first channel.

[0173] Optionally, the method 200 may be applied to frequency bands above 45 GHz.

[0174] Specifically, the frequency band above 45 GHz may be the frequency band above 56.16 GHz. In other words, the method 200 may be applied to the channel configuration scenario shown in FIG.

[0175] Standards above 45 GHz may include, but are not limited to, the DMG standard, the EDMG standard, the China directional multi-gigabit (CDMG) standard, the China millimeter-wave multi-gigabit (CMMG) standard, and the like.

[0176] For example, the carrier center frequency of the first channel is 45 GHz or higher.

[0177] Optionally, N is a product of M elements in the first set of real numbers, where M is a positive integer, and it is assumed that M is less than or equal to the total number of elements in the first set of real numbers.

[0178] In one implementation, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing. In this case, all M elements are odd numbers. In other words, M odd numbers may be selected from a first set of real numbers, and N is a product of the M odd numbers, so that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

[0179] In one implementation, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing, where at least one of the M elements is an even number. In other words, the M elements may be selected from a first set of real numbers, where at least one of the M elements is an even number, and N is a product of the M elements, such that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

[0180] The first set of real numbers is a set consisting of factors obtained by performing factorization based on the first value X. Details are as follows.

[0181] In one implementation, X=|f c1 -f c2 | and f c1 is the carrier center frequency of the first channel, and f c2 is the carrier center frequency of the second channel. In other words, the first value X is the frequency value of the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel.

[0182] Optionally, all elements in the first set of real numbers are prime numbers.

[0183] For example, assume that the frequency value of the interval between the carrier center frequency of the first channel and the carrier center frequency of the second channel is 2.16 GHz, and factorization is performed on 2.16 GHz in Hz units, i.e., 2.16 GHz = (3^3) * (2^10) * (5^7) Hz. Specifically, the factors obtained by factoring 2.16 GHz are 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5, 5, 5, 5, 5, 5, 5. Therefore, the first real number set is {3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 5, 5, 5, 5, 5, 5}, which contains a total of 20 elements. N may be the product of M of these elements, where M is less than 20.

[0184] To ensure that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing, one or more elements may be selected from {3, 3, 3, 5, 5, 5, 5, 5, 5, 5}. Currently, suitable subcarrier spacing for high frequencies is generally 1 MHz or more and several tens of MHz or less. Therefore, some examples of selected N are as follows: N=3*3*3*5*5=675. In this case, the subcarrier spacing is 2.16GHz / 675=3.2MHz. N=5*5*5*5=625. In this case, the subcarrier spacing is 2.16GHz / 625=3.456MHz. N=3*5*5*5=375. In this case, the subcarrier spacing is 2.16GHz / 375=5.75MHz. N=3*3*5*5=225. In this case, the subcarrier spacing is 2.16GHz / 225=9.6MHz. N=3*3*3*5=135. In this case, the subcarrier spacing is 2.16GHz / 135=16MHz. N=5*5*5=125. In this case, the subcarrier spacing is 2.16GHz / 125=17.28MHz.

[0185] To ensure that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing, one or more elements may be selected from {3,3,3,2,2,2,2,2,2,2,2,2,2,2,5,5,5,5,5,5,5}, including at least one "2". Currently, suitable subcarrier spacing for high frequencies is generally 1 MHz or more and several tens of MHz or less. Therefore, some examples of selected N are as follows: N=2^9=512. In this case, the subcarrier spacing = 2.16GHz / 512=4.21875MHz. N=2*2*5*5*5=500. In this case, the subcarrier spacing = 2.16GHz / 500=4.32MHz. N=2^7*3=384. In this case, the subcarrier spacing is 2.16GHz / 384=5.625MHz. N=2*2*2*2*5*5=400. In this case, the subcarrier spacing = 2.16GHz / 400=5.4MHz. N=2*2*2*2*2*2*2*5=320. In this case, the subcarrier spacing = 2.16GHz / 320=6.75MHz. N=2^8=256. In this case, the subcarrier spacing is 2.16GHz / 256=8.4375MHz. N=2*5*5*5=250. In this case, the subcarrier spacing is 2.16GHz / 250=8.64MHz. N=2*2*2*5*5=200. In this case, the subcarrier spacing = 2.16GHz / 200=10.8MHz.

[0186] In this implementation, X=|f c1 -f c2 The factorization is performed using |, where N is the product of M elements in the first real number set. Therefore, the subcarrier spacing value is the product of the remaining elements in the first real number set. Since the units of X are integers in Hz or MHz, the subcarrier spacing value can also be an integer in Hz or MHz. This facilitates device implementation.

[0187] It should be understood that in the solution of the present application, the factorization may be performed on frequency values ​​in units of Hz, kHz, or MHz, or the factorization may be performed on frequency values ​​in units of GHz. This is not a limitation of the present application. In the above example, during the factorization, the units of X are Hz.

[0188] In another implementation, X = first width * number of sampling points * 10^n. In other words, the first value X is 10^n times the product of the first width and the number of sampling points, where n represents the number of decimal places in the sampling frequency and is an integer. For example, n = 0, 1, 2, 3, .... The number of sampling points is 2^n2, where n2 is an integer. For example, n2 = 5, 6, 7, 8, 9, or 10, and the number of sampling points may be 32, 64, 128, 256, 512, or 1024. The first width and the sampling frequency may each be in units of GHz.

[0189]

number

[0190] For example, if the first width is 2.16 GHz and the number of sampling points is 512, then N = 2.16 GHz / (z / 512), i.e., N = 2.16 * 512 / z, or N = 1105.92 / z. Multiply both the numerator and denominator by 100. In this case, 100z is an integer. That is, N × 100z = 110592. The factorization is 110592 = (3^3) * (2^12), i.e., the factors obtained by factoring X = 2.16 GHz * 512 * 100 are 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, therefore the first set of real numbers is {3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2}, which contains a total of 15 elements. N may be the product of M of these elements, where M is less than 15.

[0191] One or more elements may be selected from {3,3,3} so that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing. Thus, the value of N is 3, 9, or 27. The corresponding subcarrier spacings are 2.16 GHz / 3 = 720 MHz, 2.16 GHz / 9 = 240 MHz, and 2.16 GHz / 27 = 80 MHz, respectively.

[0192] To ensure that the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing, one or more elements may be selected from {3,3,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2}, including at least one "2." Currently, suitable subcarrier spacing for high frequencies is generally 1 MHz or more and several tens of MHz or less. A simple example is provided below: N=3*2^7=384. In this case, subcarrier spacing=2.16GHz / 384=5.625MHz and z=5.625*512=2.88GHz.

[0193] In this implementation, factorization is performed on the result of X = first width * number of sampling points * 10^n, where N is the product of M elements in the first set of real numbers. Therefore, the value of the sampling frequency is the product of the remaining elements in the first set of real numbers. Since X is in units of GHz, the sampling frequency can also be in units of GHz, and the value of the sampling frequency is relatively simple.

[0194] moreover,

number

[0195] It should be understood that when the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing, the first width and the sampling frequency may be the same, for example, both may be 2.16 GHz. In this case, the number of points may be set to 2^n. For example, between 2.16 GHz and 2.16 GHz, there are 256 subcarriers (subcarrier spacing = 2.16 GHz / 256 = 8.7375 MHz) and 512 subcarriers (subcarrier spacing = 2.16 GHz / 512 = 4.21875 MHz).

[0196] It should be further understood that the above example uses an example in which the smallest unit used for channel division when determining the subcarrier spacing value is 2.16 GHz. However, the present application is not limited thereto. Alternatively, the smallest unit used for channel division may be 80 MHz, or the smallest unit used for channel division may be an integer multiple of 80 MHz, such as 160 MHz, 320 MHz, 640 MHz, 1280 MHz, or 2560 MHz. For methods for determining the value of N and the subcarrier spacing value, see the above example. For example, if the smallest unit used for channel division is 80 MHz, factorization may be performed on 80*10^6 Hz, or on 80*number of sampling points*10^n, where the factorization of 80*10^6 includes the factors {5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2}. Furthermore, N may be determined based on the factorization factors. Furthermore, the subcarrier spacing may be determined based on N and the channel bandwidth of 80 MHz.

[0197] Additionally, in the solution of the present application, the factorization may be performed on frequency values ​​in units of Hz, kHz, or MHz, or on frequency values ​​in units of GHz, which is not a limitation of the present application. In one example of this implementation, the units of X are GHz during the factorization.

[0198] Optionally, in any one of the above implementations, the obtained subcarrier spacing value may be further rounded, for example, rounded up, rounded down, or retained to a limited number of decimal places.

[0199] Optionally, in one implementation, the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel, or the interval between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier interval. It should be understood that the DC carrier frequency of the channel is the frequency center position of the bandwidth of the PPDU.

[0200] Optionally, the third channel is N CB = i+1, and the interval between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing, for example, the interval between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an odd or even multiple of the subcarrier spacing.

[0201] In one implementation, one subcarrier of the third channel and one subcarrier of the first channel have the same frequency location.

[0202] The channel distribution and PPDU distribution in the method 200 will now be described with reference to FIGS.

[0203] 7 is a diagram of a channel distribution according to an embodiment of the present application. As shown in FIG. 7, Δf represents the subcarrier spacing, and the channel division is performed in units of 2.16 GHz. In the diagram, the thin dashed line represents the carrier center frequency of the 2.16 GHz channel and the DC carrier frequency of the 2.16 GHz channel, the thick dashed line represents the carrier center frequency of the 4.32 GHz channel, the thick solid line represents the DC carrier frequency of the 4.32 GHz channel, and the shaded area represents the PPDU bandwidth of each channel.

[0204] The spacing between the carrier center frequency f3 of the left 2.16 GHz channel and the carrier center frequency f6 of the right 2.16 GHz channel is N*Δf = (2x + 1)*Δf. The carrier center frequencies of the left and right 2.16 GHz channels are the same as the DC carrier frequency of the channel.

[0205] The DC carrier frequency f5 of the 4.32 GHz channel can be between the carrier center frequency f3 of the left 2.16 GHz channel and the carrier center frequency f6 of the right 2.16 GHz channel, and the spacing between f5 and f3 or f6 is an integer multiple of the subcarrier spacing. Assuming that the spacing between f5 and f3 is n1 times the subcarrier spacing, then f5 = f3 + n1 * Δf. When f5 can coincide with f6, the value of n1 can be 0, 1, 2, 3, ..., or N, i.e., f5 includes a total of N+1 arbitrary positions.

[0206] In the example shown in FIG. 7, N=2x+1 (x≧1), i.e., the spacing between the carrier center frequency f3 of the left 2.16 GHz channel and the carrier center frequency f6 of the right 2.16 GHz channel is an odd multiple of the subcarrier spacing, and the value of n1 is x+1. Therefore, the DC carrier frequency f5 of the 4.32 GHz channel is to the right of the carrier center frequency f4 of the 4.32 GHz channel, and the spacing between f5 and f4 is less than Δf. In this case, the value of x+1 can be either odd or even, so the spacing between f5 and f3 can be either an odd or even multiple of the subcarrier spacing. Similarly, the value of x can be either odd or even, so the spacing between f5 and f6 can be either an odd or even multiple of the subcarrier spacing. In addition, the difference between f5 and f4 is 0.5*Δf.

[0207] 7, in the above example, the PPDU bandwidth of the 2.16 GHz channel (e.g., the shaded area) may include (1+2y) subcarriers, and the PPDU bandwidth of the 2.16 GHz channel may be (1+2y)*Δf, where y is less than or equal to x. For example, if the PPDU bandwidth supported by the 2.16 GHz channel is within 1.88 GHz, then 2y+1 may satisfy (2y+1)*Δf≦1.88 GHz. It should be understood that the specific value of y is related to the performance of the spectrum profile, and an excessively large PPDU bandwidth requires better performance of the spectrum profile and has relatively high requirements for the device.

[0208] Furthermore, the number of subcarriers included in the PPDU bandwidth of a 4.32 GHz channel can be 1 + (x + 1) + (x) + y + (y - 1) = 1 + 2x + 2y, or 1 + (x + 1) + (x) + y + y = 2 + 2x + 2y. Here, 1 is the subcarrier on which the DC carrier frequency is located (denoted as subcarrier #0), x + 1 is the number of subcarrier intervals between subcarrier #0 and f3, x is the number of subcarrier intervals between subcarrier #0 and f6, and y is the number of subcarrier intervals to the left of f3 or to the right of f6 on the PPDU bandwidth. If it is necessary to ensure that the number of subcarriers to the left and right of subcarrier #0 on the PPDU bandwidth is the same, a 1 + 2x + 2y subcarrier distribution scheme can be used to distribute the DC + pilot + data subcarriers. If it is allowed that the number of DC + pilot + data subcarriers to the left and right of subcarrier #0 do not match, a 2 + 2x + 2y scheme can be used.

[0209] Optionally, in another example similar to Figure 7, the value of n1 may alternatively be x, where f5 is to the left of f4 and the difference between f5 and f4 is 0.5*Δf.

[0210] In any one of the foregoing examples, the left 2.16 GHz channel may be used as an example of a first channel, the right 2.16 GHz channel may be used as an example of a second channel, and vice versa. In addition, 4.32 GHz may be used as an example of a third channel.

[0211] Optionally, 4.32 GHz may alternatively be used as an example of the first channel, i.e., the first channel is N CB= 2 channels. In this case, f1 and f7 are the carrier center frequencies of 4.32 GHz channels with different channel numbers, and f2 and f8 can be used as the DC carrier frequencies of 4.32 GHz channels with different channel numbers. Therefore, the DC relative shifts of 4.32 GHz channels with different channel numbers are the same, for example, all 0.5*Δf.

[0212] The aforementioned method also CB It is also applicable to channels >2. For example, N CB For a =3 channel, the DC carrier frequency may be the carrier center frequency of the middle 2.16 GHz channel of the three left, center, and right 2.16 GHz channels, i.e., f3 or f6. CB For channel f = 3, the DC carrier frequency is between f3 and f6, i.e., still f5.

[0213] Based on the above solution, the frequency interval between the carrier center frequencies of two adjacent channels is an integer multiple of the OFDM subcarrier interval, so the subcarrier configuration can be performed based on the carrier center frequency, and no DC relative shift is required, which reduces the complexity of channel usage and simplifies device implementation.

[0214] Figure 8 is a diagram of another channel distribution according to an embodiment of the present application. Please refer to Figure 7 for the explanation and description of Figure 8. The following mainly describes the differences between Figure 8 and Figure 7. In Figure 8, the spacing between the carrier center frequency f3 of the left 2.16 GHz channel and the carrier center frequency f6 of the right 2.16 GHz channel is an even multiple of the subcarrier spacing, i.e., N*Δf=(2x)*Δf. Therefore, the DC carrier frequency f5 of the 4.32 GHz channel may coincide with the carrier center frequency f4 of the 4.32 GHz channel.

[0215] In addition, as shown in Figure 8, the number of subcarriers included in the PPDU bandwidth of a 4.32 GHz channel may be 1 + x + x + y + (y - 1) = 2 x + 2 y, or 1 + x + x + y + y = 1 + 2 x + 2 y. If it is necessary to ensure that the number of subcarriers to the left and right of subcarrier #0 on the PPDU bandwidth is the same, a 1 + 2 x + 2 y subcarrier distribution scheme may be used to distribute the DC + pilot + data subcarriers. If it is allowed that the number of DC + pilot + data subcarriers to the left and right of subcarrier #0 does not match, a 2 x + 2 y scheme may be used.

[0216] Optionally, in another example similar to Figure 7, the value of n1 may alternatively be x, where f5 is to the left of f4 and the difference between f5 and f4 is 0.5*Δf.

[0217] In any one of the foregoing examples, the left 2.16 GHz channel may be used as an example of a first channel, the right 2.16 GHz channel may be used as an example of a second channel, and vice versa. In addition, 4.32 GHz may be used as an example of a third channel.

[0218] Optionally, 4.32 GHz may alternatively be used as an example of the first channel, i.e., the first channel is N CB = 2 channels. In this case, f1 and f7 may be the carrier center frequencies of 4.32 GHz channels with different channel numbers, or may be used as DC carrier frequencies of 4.32 GHz channels with different channel numbers. Therefore, each 4.32 GHz channel may have no DC relative shift.

[0219] In addition, in the example of Figure 8, one subcarrier in the 2.16 GHz channel and one subcarrier in the 4.32 GHz channel have the same frequency location. Optionally, each subcarrier in the 2.16 GHz channel and one subcarrier in the 4.32 GHz channel may correspond to each other and have the same frequency location. In other words, the set of subcarriers in the 2.16 GHz channel may be a subset of the set of subcarriers in the 4.32 GHz channel.

[0220] Based on the above solution, the frequency interval between the carrier center frequencies of two adjacent channels is an integer multiple of the OFDM subcarrier interval, so the subcarrier configuration can be performed based on the carrier center frequency, and no DC relative shift is required, which reduces the complexity of channel usage and simplifies device implementation.

[0221] It should be understood that in the examples of Figures 7 and 8, 2.16 GHz is used as the smallest unit of channel division. This is merely an example and does not constitute a limitation to the present application. For example, the smallest unit of channel division may alternatively be 80 MHz, 160 MHz, 320 MHz, 640 MHz, 1280 MHz, or 2560 MHz. In the following, for the purpose of explanation with reference to Figures 9 and 10, an example in which the smallest unit of channel division is 320 MHz will be used.

[0222] FIG. 9 is a diagram of another channel distribution according to an embodiment of the present application. As shown in FIG. 9, channel division is performed in 320 MHz units. In FIG. 9, the thin dashed line represents the carrier center frequency of the 320 MHz channel, the thick dashed line represents the carrier center frequency of the 640 MHz channel, and the shaded area represents the PPDU bandwidth of each channel. The spacing between the carrier center frequency of the left 320 MHz channel and the carrier center frequency of the right 320 MHz channel may be an integer multiple of the subcarrier spacing, and the DC carrier frequencies of the left and right 320 MHz channels may be the same as the carrier center frequencies of the channels. After the DC carrier frequency of the 320 MHz channel is determined, the spacing between the DC carrier frequency of the 640 MHz channel and the DC carrier frequency of the 320 MHz channel may be an integer multiple of the subcarrier spacing. As in Figure 7, the spacing between the carrier center frequency of the left 320 MHz channel and the carrier center frequency of the right 320 MHz channel may be an odd multiple of the subcarrier spacing, and the spacing between the DC carrier frequency of the 640 MHz channel and the carrier center frequency of the 640 MHz channel may be 0.5 times the subcarrier spacing. As in Figure 8, the spacing between the carrier center frequency of the left 320 MHz channel and the carrier center frequency of the right 320 MHz channel may be an even multiple of the subcarrier spacing, and the DC carrier frequency of the 640 MHz channel may coincide with the carrier center frequency of the 640 MHz channel. The size of the PPDU bandwidth of the 320 MHz channel is related to limitations such as spectral profile performance. If conditions permit, the PPDU bandwidth may be close to or equal to the channel width of 320 MHz.

[0223] FIG. 10 is a diagram of another channel distribution according to an embodiment of the present application. As shown in FIG. 10, channel division may be performed in units of Q MHz, with the PPDU bandwidth being 320 MHz, where Q is an integer and the value of Q depends on the performance of the spectral profile. This is not a limitation of the present application. In FIG. 10, the thin dashed line represents the carrier center frequency of the Q MHz channel, the thick dashed line represents the carrier center frequency of the 2Q MHz channel, and the shaded area represents the PPDU bandwidth of each channel. The spacing between the carrier center frequency of the left Q MHz channel and the carrier center frequency of the right Q MHz channel may be an integer multiple of the subcarrier spacing, and the DC carrier frequencies of the left and right Q MHz channels may be the same as the carrier center frequency of the channel. After the DC carrier frequency of the Q MHz channel is determined, the spacing between the DC carrier frequency of the 2Q MHz channel and the DC carrier frequency of the Q MHz channel may be an integer multiple of the subcarrier spacing. As in Figure 7, the spacing between the carrier center frequencies of the left QMHz channel and the right QMHz channel may be an odd multiple of the subcarrier spacing, and the spacing between the DC carrier frequency of the 2QMHz channel and the carrier center frequency of the 2QMHz channel may be 0.5 times the subcarrier spacing. As in Figure 8, the spacing between the carrier center frequencies of the left QMHz channel and the right QMHz channel may be an even multiple of the subcarrier spacing, and the DC carrier frequency of the 2QMHz channel may coincide with the carrier center frequency of the 2QMHz channel. The size of the PPDU bandwidth of the QMHz channel is related to limitations such as spectral profile performance. If conditions permit, the PPDU bandwidth may also be close to or equal to the channel width of QMHz.

[0224] In the examples of Figures 7-10, it should be understood that 2.16 GHz, 4.32 GHz, 320 MHz, 640 MHz, QMHz, 2QMHz, etc. may be non-aggregated channels or may be used as part of an aggregated channel.

[0225] 11 is a schematic flowchart of a communication method 300 according to an embodiment of the present application. For some concepts or explanations of the method 300, please refer to FIGS.

[0226] S310: The first station generates a PPDU.

[0227] For an explanation of S310, please refer to S210. The details will not be explained again here.

[0228] S320: The first station transmits a PPDU to the second station on the fourth channel, and correspondingly, the second station receives the PPDU on the fourth channel.

[0229] Optionally, the method 300 further includes: the second station parses the PPDU.

[0230] For an explanation of S330, please refer to S230, and the details will not be explained again here.

[0231] In one embodiment of method 300, the fourth channel in method 300 is described as follows:

[0232] In this embodiment, the interval between the DC carrier frequency of the fourth channel and the DC carrier frequency of the fifth channel is not equal to the interval between the carrier center frequency of the fourth channel and the DC carrier frequency of the sixth channel, and the fourth channel, the fifth channel, and the sixth channel are all N CB =i, the fourth channel is adjacent to the fifth channel, and the fourth channel is adjacent to the sixth channel. For example, the fourth channel has channel number #a, the fifth channel has channel number #(a-1), and the sixth channel has channel number #(a+1), where a is an integer. In other words, the spacing between the DC carrier frequencies of adjacent channels is not necessarily the same.

[0233] Optionally, the fourth channel, the fifth channel, and the sixth channel in this embodiment are all N CB = 1 channel, i.e., the channel widths of the fourth, fifth, and sixth channels are all equal to the first width. CB For a specific description of "channel of i=i", please refer to method 200. The details will not be described again here.

[0234] In this way, the DC relative shift can be better controlled within a certain range, for example, the DC relative shift can be controlled within a range of 0.5 times the subcarrier spacing.

[0235] In the following, an example will be used to explain this embodiment with reference to FIG.

[0236] FIG. 12 is a diagram of another channel distribution according to an embodiment of the present application. Similar to FIG. 5, in FIG. 12, the thin dashed line represents the carrier center frequency of the 2.16 GHz channel, the thin solid line represents the DC carrier frequency of the 2.16 GHz channel, the thick dashed line represents the carrier center frequency of the 4.32 GHz channel, the thick solid line represents the DC carrier frequency of the 4.32 GHz channel, and the shaded area represents the PPDU bandwidth of each channel. The difference from FIG. 5 is that the spacing between the DC carrier frequencies of adjacent 2.16 GHz channels may be (2x+1) subcarrier spacing. For example, the spacing between Channel #2 (an example of the fourth channel) and Channel #3 (an example of the sixth channel) may be 2x subcarrier spacing. For example, the spacing between Channel #1 (an example of the fifth channel) and Channel #2 may be a different multiple of the subcarrier spacing. This is not a limitation. In other words, the spacing between the DC carrier frequencies of adjacent channels is not necessarily the same. Furthermore, in this way, the difference between the DC carrier frequency of each channel and the carrier center frequency of the channel may be less than or equal to 0.5 times the subcarrier spacing, and the DC carrier frequency of each channel may be greater than or less than the carrier center frequency of the channel. In FIG. 12, the intervals between the carrier center frequency of channel #4 and the DC carrier frequencies of channels #3, #2, and #1 are ((2x+1)Δf-2.16), 2((2x+1)Δf-2.16), and ((6x+2)Δf-6.48), respectively. The interval between the DC carrier frequency of channel #3 and the carrier center frequency of channel #4 is ((2x+1)Δf-2.16), the interval between the DC carrier frequency of channel #2 and the carrier center frequency of channel #3 is ((2x+1)Δf-2.16), and the interval between the DC carrier frequency of channel #1 and the carrier center frequency of channel #2 is ((2x)Δf-2.16). In other words, the intervals between the DC carrier frequencies of adjacent channels are not necessarily the same. Therefore, the DC relative shift of channel #1 in FIG. 12 is smaller than the DC relative shift of channel #1 in FIG. 5.

[0237] In this application, the frequency point used to determine the DC carrier frequency of another channel may be referred to as a reference point, the frequency of the reference point may be referred to as an anchor frequency, and the subcarrier on the reference point frequency may be referred to as an anchor subcarrier. Generally, the carrier center frequency of a channel whose carrier center frequency is the same as the DC carrier frequency may be used as the reference point. In Figure 12, the carrier center frequency of channel #4 is used as the reference point.

[0238] In Figure 5, the spacing between the DC carrier frequencies of channels #1 and #2, the spacing between the DC carrier frequencies of channels #2 and #3, and the spacing between the DC carrier frequencies of channels #3 and #4 are all (2x + 1)Δf, i.e., the spacing between adjacent DC carrier frequencies is equal. It should also be noted that the spacing between the carrier center frequency of channel #4 and the DC carrier frequencies of channels #3, #2, and #1 are (419Δf - 2.16), 2(419Δf - 2.16), and 3(419Δf - 2.16) GHz, respectively. Therefore, the longer the distance from the reference point, the greater the spacing between the DC carrier frequency and the carrier center frequency of each of channels #3, #2, and #1. In 802.11ay, a solution in which the spacing between the DC carrier frequencies of adjacent channels is equal (all 419Δf - 2.16) is sometimes used. This is because (419Δf - 2.16) / Δf = 0.00046875 / 0.00515625 ≒ 0.091, i.e., the deviation each time is not large, and a deviation of approximately one subcarrier spacing occurs only when the number of times is greater than 11 (i.e., 1 / 0.091 ≒ 11). However, if Δf and the channel width are different, the deviation is not necessarily small. For example, assume the following relationship exists: (spacing between the DC carrier frequencies of adjacent channels - channel width) / Δf = 0.4. In this case, if the reference point is used as the reference, the deviation will be greater than one subcarrier spacing when the deviation is repeated three times. In this embodiment, because the spacing between the DC carrier frequencies of adjacent channels is not equal, the DC relative shift of some channels can be reduced, for example, the DC relative shift of a channel can be prevented from exceeding 0.5 times the subcarrier spacing.

[0239] It should be understood that the location of the reference point is not limited in this embodiment. The reference point may be located on a channel in the center of the entire frequency band. For example, in Figures 5 and 12, the reference point is located on the DC carrier frequency of channel #4. Optionally, the location of the reference point may be at another location, such as the lowest frequency channel, the highest frequency channel, or another frequency location, such as the carrier center frequency of a 4.32 GHz channel, i.e., 59.4 GHz.

[0240] Optionally, there may be multiple reference points, each used to determine the DC relative shift of one or more channels.

[0241] In addition, FIG. 12 is just an example. In FIG. 12, the thick solid line is first determined by using an odd multiple of the subcarrier spacing, and then the thin solid line is determined by using an even multiple of the subcarrier spacing from the reference point on both sides. Optionally, the thick solid line may be first determined by using an even multiple of the subcarrier spacing, and then the thin solid line is determined by using an odd multiple of the subcarrier spacing from the reference point on both sides. This is not limited in the present application. When the subcarrier spacing between adjacent thin solid lines is an even number, the thick solid line and the thin solid line can be determined by using an even multiple of the subcarrier spacing. When the reference point is at another frequency position, the above method is still applicable.

[0242] In another embodiment, the fourth channel in the method 300 is described as follows.

[0243] In this embodiment, the DC carrier frequency of the fourth channel is the same as the carrier center frequency of the fourth channel, and the DC carrier frequency of the fifth channel is the same as the carrier center frequency of the fifth channel, and both the fourth channel and the fifth channel are N CB =i channel. CB For a specific description of "channel of i=i", please refer to method 200. The details will not be described again here.

[0244] In other words, in this embodiment, N CB Since the DC carrier frequency and carrier center frequency of the i channel are the same, N CB = i+1 channels and N CB Some subcarriers of the channel with .times. ...

[0245] Optionally, the method may be understood as a partial subcarrier consistency solution.

[0246] In the following, an example will be used to explain this embodiment with reference to FIG.

[0247] FIG. 13 is a diagram of another channel distribution according to an embodiment of the present application. Similar to FIG. 5, in FIG. 13, the thin dashed line represents the carrier center frequency of the 2.16 GHz channel, the thin solid line represents the DC carrier frequency of the 2.16 GHz channel, the thick dashed line represents the carrier center frequency of the 4.32 GHz channel, the thick solid line represents the DC carrier frequency of the 4.32 GHz channel, and the shaded area represents the PPDU bandwidth of each channel. As shown in FIG. 13, the positions of the carrier center frequency and DC carrier frequency of the 2.16 GHz channel are consistent. In the diagram, the DC carrier frequency and carrier center frequency of the left 2.16 GHz channel (i.e., channel #1, which is also an example of the fourth channel) are the same, and the DC carrier frequency and carrier center frequency of the right 2.16 GHz channel (i.e., channel #2, which is also an example of the fifth channel) are also the same. N CBFor the +2 4.32 GHz channel, the DC carrier frequency is (58.32+210*5.15625*10^(-3)) GHz = 59.4028125 GHz, and the subcarriers to the left of the DC carrier frequency may have the exact same frequency position as the subcarriers on the #1 channel, while the subcarriers to the right of the DC carrier frequency have a shift from the subcarriers on the #2 channel, where the shift is 59.4028125 GHz - 59.4 GHz = 0.0028125 GHz. This is sometimes called the partial subcarrier alignment solution.

[0248] In another embodiment, the fourth channel in method 300 is described as follows:

[0249] In this embodiment, the spacing between the DC carrier frequency of the fourth channel and the carrier center frequency of the fifth channel is an integer multiple of the subcarrier spacing. CB = i + 1. In other words, the fifth channel is N CB = 1. That is, the channel width of the fifth channel is larger than the smallest unit used for channel division. In other words, the channel width of the fifth channel is larger than the smallest channel width granularity. For example, in FIG. 3, if channel division is performed using 2.16 GHz as the smallest unit, the channel width of the fifth channel is larger than 2.16 GHz.

[0250] Optionally, the fourth channel is N CB = i channels, or N CB = i+1 channel, or N CB = i+2 channels, which is not a limitation in this application.

[0251] Specifically, because the DC carrier frequency and carrier center frequency of channel #4 are located at the same position, the reference point in FIG. 5 is the carrier center frequency of channel #4. However, the reference point may be determined using another channel. For example, the reference point may be determined using a channel with a larger channel width, such as a 4.32 GHz channel, a 6.48 GHz channel, or an 8.64 GHz channel. For the 4.32 GHz channel, a 6.48 GHz channel, or an 8.64 GHz channel, the carrier center frequency of the channel whose carrier center frequency is the same as the DC carrier frequency may be selected as the reference point. After the reference point is determined, the DC carrier frequency of any channel may be determined based on the reference point, and the spacing between the DC carrier frequency of any channel and the reference point may be an integer multiple of the subcarrier spacing. However, there may or may not be a DC relative shift between the DC carrier frequency of the fourth channel and the carrier center frequency of the fourth channel. This depends specifically on the value of the subcarrier spacing.

[0252] In the following, an example will be used to explain this embodiment with reference to FIG.

[0253] FIG. 14 is an illustration of another channel distribution according to an embodiment of the present application.

[0254] As in Figure 5, in Figure 14, the thin dashed line represents the carrier center frequency of the 2.16 GHz channel, the thin solid line represents the DC carrier frequency of the 2.16 GHz channel, the thick dashed line represents the carrier center frequency of the 4.32 GHz channel, the thick solid line represents the DC carrier frequency of the 4.32 GHz channel, and the shaded areas represent the PPDU bandwidth of each channel. As shown in Figure 14, the reference point is the carrier center frequency of channel #9 (an example of the fifth channel), which is 59.4 GHz. In this case, the carrier center frequency of channel #9 is the same as the DC carrier frequency of that channel.

[0255] After the reference point is determined, the DC carrier frequency of the 2.16 GHz channel can be determined based on the reference point. For example, in FIG. 14, the spacing between the DC carrier frequency of the left 2.16 GHz channel (Channel #1, which is also an example of the fourth channel) and the reference point is xΔf, i.e., an integer multiple of the subcarrier spacing, where x is an arbitrary integer. The spacing between the DC carrier frequency of the right 2.16 GHz channel (Channel #2, which is also another example of the fourth channel) and the reference point can also be xΔf, i.e., an integer multiple of the subcarrier spacing. In this case, there may or may not be a DC relative shift between the DC carrier frequency of the left 2.16 GHz channel and the carrier center frequency of the left 2.16 GHz channel, and there may or may not be a DC relative shift between the DC carrier frequency of the right 2.16 GHz channel and the carrier center frequency of the right 2.16 GHz channel. This specifically depends on the value of the subcarrier spacing. For another 4.32 GHz channel, for example, the DC carrier frequency of channel #10 (another example of a fourth channel not shown, see FIG. 5 for the location of channel #10) may also be determined based on the reference point. However, there may or may not be a DC relative shift between the DC carrier frequency of channel #10 and the carrier center frequency of channel #10. This depends specifically on the value of the subcarrier spacing. In addition, the DC carrier frequencies of other channels, such as 6.48 GHz and 8.64 GHz channels (not shown, see FIG. 3 for the 6.48 GHz and 8.64 GHz channels), may also be determined based on the reference point. There may or may not be a DC relative shift between the DC carrier frequency of another channel and the reference point. This depends specifically on the value of the subcarrier spacing. The PPDU bandwidth depends on the performance of the spectrum profile. For example, in Figure 14, the PPDU bandwidth of channel #1 and the PPDU bandwidth of channel #2 (i.e., the shaded area in Figure 14) may include (1 + 2y) subcarriers, and the size of the PPDU bandwidth is (1 + 2y) * Δf, where the value of y depends on the performance of the spectral profile.

[0256] It should be further understood that the value of the subcarrier spacing is not limited in this application. In any embodiment of the method 300 described above, the subcarrier spacing may be 5.15625 MHz or another value.

[0257] In addition, in practical applications, the embodiments of the method 300 may be combined with each other, and the method 200 and the method 300 may also be combined with each other. This is not limited.

[0258] The above describes the method embodiments in the embodiments of the present application, and the following describes the corresponding device embodiments. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, for the parts not described in detail, please refer to the aforementioned method embodiments.

[0259] 15 is a diagram of a communication device according to one embodiment of the present application. As shown in FIG. 15, the device 400 may include a transceiver unit 410 and / or a processing unit 420. The transceiver unit 410 may communicate with the outside, and the processing unit 420 is configured to process data / information. The transceiver unit 410 may also be referred to as a communication interface or a communication unit.

[0260] In a possible implementation, the apparatus 400 may be a first station in the method 200 or 300, or may be a chip configured to implement the functionality of the first station in the method 200 or 300. The apparatus 400 may implement procedures performed by the first station in the method 200 or 300. The processing unit 420 is configured to perform processing-related operations of the first station in the method 200 or 300. The transceiver unit 410 is configured to perform reception-related and / or transmission-related operations of the first station in the method 200 or 300.

[0261] For example, the processing unit 420 is configured to generate a PPDU, and the transceiver unit 410 is configured to transmit the PPDU to a second station on a first channel, the first channel being N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB = i channels, the first channel is adjacent to the second channel, N is a positive integer, and i is a positive integer.

[0262] It should be understood that the above content is only used as an example for understanding, and the device 400 may further perform other steps, actions, or methods related to the first station in the method 200 or the method 300. Details will not be described here.

[0263] In another possible implementation, the apparatus 400 may be the second station in the method 200 or 300, or may be a chip configured to implement the functionality of the second station in the method 200 or 300. The apparatus 400 may implement procedures performed by the second station in the method 200 or 300. The transceiver unit 410 is configured to perform reception-related and / or transmission-related operations of the second station in the method 200 or 300, and the processing unit 420 is configured to perform processing-related operations of the second station in the method 200 or 300.

[0264] For example, the transceiver unit 410 may be configured to receive PPDUs on a first channel, the first channel being N CB = i channel, N CB is the number of consecutive channels of the first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N CB= i channels, the first channel is adjacent to the second channel, N is a positive integer, i is a positive integer, and the processing unit 420 is configured to parse the PPDU.

[0265] It should be understood that the above content is only used as an example for understanding, and the device 400 may further perform other steps, actions, or methods related to the second station in the method 200 or the method 300, which will not be described in detail here.

[0266] It should be understood that the apparatus 400 herein is embodied in the form of a functional unit, where the term "unit" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor) configured to execute one or more software or firmware programs, a memory, a merged logic circuit, and / or another suitable component that supports the described functionality.

[0267] The apparatus 400 has a function of implementing a corresponding step performed by a first station in the aforementioned method, or the apparatus 400 has a function of implementing a corresponding step performed by a second station in the aforementioned method. The function may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned function. For example, a transceiver unit may be replaced by a transceiver (e.g., a transmitting unit in a transceiver unit may be replaced by a transmitter, and a receiving unit in a transceiver unit may be replaced by a receiver), and another unit, e.g., a processing unit, may be replaced by a processor, which separately performs receiving and transmitting operations and related processing operations in the method embodiments.

[0268] In addition, the transceiver unit may alternatively be a transceiver circuit (e.g., may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit. In the embodiments of the present application, the device 400 may be the first station or the second station in the aforementioned embodiments, or may be a chip or a chip system, for example, a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface. The processing unit is a processor, a microprocessor, or an integrated circuit integrated on a chip. This is not limited herein.

[0269] 16 is another diagram of a structure of a communication device according to an embodiment of the present application. As shown in FIG. 16, the communication device 500 includes at least one processor 510. The processor 510 is coupled to a memory and configured to execute instructions stored in the memory to control a transceiver to transmit and / or receive signals. Optionally, the communication device 500 further includes a transceiver 520 configured to transmit and / or receive signals. Optionally, the communication device 500 further includes a memory 530 configured to store instructions.

[0270] It should be understood that the processor 510 and the memory 530 may be integrated into a single processing unit. The processor 510 is configured to execute program code stored in the memory 530 to implement the functionality described above. In certain implementations, the memory 530 may alternatively be integrated into the processor 510 or may be separate from the processor 510.

[0271] It should be further understood that the transceiver 520 may include a receiver (also referred to as a receiver machine) and a transmitter (also referred to as a transmitter machine). The transceiver 520 may further include an antenna. There may be one or more antennas. The transceiver 520 may alternatively be a communications interface or interface circuit.

[0272] When the communication device 500 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface. The processing unit may be a processor, a microprocessor, or an integrated circuit integrated on the chip.

[0273] An embodiment of the present application further provides a processing device, including a processor and an interface, wherein the processor may be configured to perform the method in the aforementioned method embodiments.

[0274] It is understood that the processing device may be a chip, for example, the processing device may include a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), a system on chip (SOC), a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP) circuit, a microcontroller unit (MCU), a programmable logic device (PLD), or another integrated chip.

[0275] In the implementation process, the steps of the aforementioned method can be implemented by using hardware integrated logic circuits in a processor or by using instructions in the form of software. The steps of the method disclosed with reference to the embodiments of the present application can be directly executed by a hardware processor, or can be executed by using a combination of hardware and software modules in a processor. The software modules can be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps in the aforementioned method in combination with the hardware of the processor. To avoid repetition, the details will not be described again in this specification.

[0276] 17 is another diagram of the structure of a communication device according to one embodiment of the present application. As shown in FIG. 17, the device 600 includes a processing circuit 610. The processing circuit 610 is configured to execute instructions to implement the method in the aforementioned embodiment.

[0277] Optionally, the apparatus 600 may further include a transceiver circuit 620. The transceiver circuit 620 is configured to transmit and / or receive signals. The processing circuit 610 and the transceiver circuit 620 communicate with each other via an internal connection path to control the transceiver circuit 620 to transmit and / or receive signals.

[0278] Optionally, the apparatus 600 may further include a storage medium 630. The storage medium 630 is in communication with the processing circuit 610 and the transceiver circuit 620 via an internal connection path. The storage medium 630 is configured to store instructions, and the processing circuit 610 may execute the instructions stored in the storage medium 630.

[0279] In a possible implementation, the apparatus 600 is configured to implement a procedure corresponding to the first station in the above method embodiment.

[0280] In another possible implementation, the apparatus 600 is configured to implement a procedure corresponding to the second station in the above method embodiment.

[0281] According to the method provided in the embodiment of the present application, the present application further provides a computer program product. The computer program product includes a computer program code, and the computer program code is used to implement the method in the aforementioned method embodiment of the present application. In other words, when the computer program code is executed on a computer, the computer is enabled to execute the method in the aforementioned method embodiment of the present application.

[0282] According to the method provided in the embodiment of the present application, the present application further provides a computer-readable medium, which stores a program code, and the computer program code is used to implement the method in the above-mentioned method embodiment of the present application. In other words, when the program code is executed on a computer, the computer can execute the method in the above-mentioned method embodiment.

[0283] According to the method provided in the embodiment of the present application, the present application further provides a system including the aforementioned first station and / or second station.

[0284] As used herein, the term "at least one of..." or "at least one piece of..." refers to all or any combination of the listed items. For example, "at least one of A, B, and C" can refer to the following six cases: when only A is present, when only B is present, when only C is present, when both A and B are present, when both B and C are present, and when all of A, B, and C are present. As used herein, "at least one" means one or more. Additionally, "multiple" means two or more.

[0285] The term "and / or" in this specification only describes the relational relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases: when only A exists, when both A and B exist, and when only B exists. In addition, the character " / " in this specification generally indicates an "or" relationship between related objects.

[0286] In the embodiments of the present application, it should be understood that "B corresponding to A" indicates that B is associated with A, and B may be determined based on A. However, it should be further understood that determining B based on A does not mean that B is determined based only on A. B may alternatively be determined based on A and / or other information. The terms "include," "have," and variations thereof all mean "including but not limited to," unless specifically emphasized otherwise.

[0287] It should be understood that in the various embodiments of the present application, the first, second, and various numerals are merely for distinction purposes for ease of description and are not intended to limit the scope of the embodiments of the present application, e.g., to distinguish between different pieces of information.

[0288] Those skilled in the art may recognize that, in combination with the examples described in the embodiments disclosed herein, the units and algorithm steps may be implemented by using electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but the implementation form should not be considered to go beyond the scope of this application.

[0289] For the sake of convenient and concise description, it can be clearly understood by those skilled in the art that for the detailed operation processes of the aforementioned systems, devices and units, please refer to the corresponding processes in the aforementioned method embodiments, and the details will not be described again in this specification.

[0290] In some embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the described device embodiments are merely examples. For example, the division into units is merely a logical division of function, and other divisions may be used in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. In addition, the shown or described mutual couplings or direct couplings or communication connections may be implemented via some interfaces. Indirect couplings or communication connections between devices or units may be implemented in electronic, mechanical, or other forms.

[0291] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, i.e., they may be located in one place or distributed over multiple network units. Some or all of the units may be selected based on the actual requirements for achieving the objectives of the solutions of the embodiments.

[0292] In addition, the functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0293] When a function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may essentially, or a portion of the technical solution, be implemented in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes any medium capable of storing program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0294] The above description is merely a specific implementation form of the present application and does not limit the protection scope of the present application. Any variations or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application shall fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. 1. A communication method comprising: generating a physical layer protocol data unit (PPDU); transmitting the PPDU on a first channel, the first channel being N ＣＢ = i channel, and N ＣＢ is the number of consecutive channels of a first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N ＣＢ = i channels, the first channel being adjacent to the second channel, N being a positive integer, and i being a positive integer; A method comprising:

2. 1. A communication method comprising: receiving a physical layer protocol data unit (PPDU) on a first channel, the first channel being N ＣＢ = i channel, and N ＣＢ is the number of consecutive channels of a first width, the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is N times the subcarrier spacing, and the second channel is N ＣＢ = i channels, the first channel being adjacent to the second channel, N being a positive integer, and i being a positive integer; parsing the PPDU; A method comprising:

3. The method of claim 1 or 2, wherein the bandwidth of the PPDU is equal to or less than the channel width of the first channel.

4. The method according to claim 1 , wherein the method is applied to a frequency band of 45 GHz or higher, or the carrier center frequency of the first channel is 45 GHz or higher.

5. The method according to claim 1 , wherein the method is applied to a directional multi-gigabit standard, an extended directional multi-gigabit standard, a Chinese directional multi-gigabit standard, or a Chinese millimeter wave multi-gigabit standard.

6. The method of claim 1 , wherein the first width is a minimum channel width granularity.

7. the first width is 2.16 GHz; or the first width is 80 MHz; 7. The method according to any one of claims 1 to 6.

8. The method of claim 1 , wherein the value of i is one of 1, 2, 3, or 4.

9. N is a product of M elements in a first set of real numbers, where M is a positive integer, and the first set of real numbers is a set consisting of factors obtained by performing factorization on a first value X; X = |f ｃ１ -f ｃ２ | and f ｃ１ is the carrier center frequency of the first channel, and f ｃ２ is the carrier center frequency of the second channel, or X = first width * number of sampling points * 10^n, where n is an integer; 9. The method according to any one of claims 1 to 8.

10. The method of claim 9 , wherein the M elements include only odd numbers, or the M elements include at least one even number.

11. 10. The method of claim 1, wherein the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an odd multiple of the subcarrier spacing.

12. 12. The method of claim 11, wherein the first width is 2.16 GHz and the subcarrier spacing value is one of 3.2 MHz, 3.456 MHz, 5.75 MHz, 9.6 MHz, 16 MHz, and 17.28 MHz.

13. 10. The method of claim 1, wherein the spacing between the carrier center frequency of the first channel and the carrier center frequency of the second channel is an even multiple of the subcarrier spacing.

14. 14. The method of claim 13, wherein the first width is 2.16 GHz and the subcarrier spacing value is one of 4.21875 MHz, 4.32 MHz, 5.625 MHz, 5.4 MHz, 6.75 MHz, 7.5 MHz, 8.4375 MHz, 8.64 MHz, and 10.8 MHz.

15. the DC carrier frequency of the first channel is the same as the carrier center frequency of the first channel; or the spacing between the DC carrier frequency of the first channel and the carrier center frequency of the first channel is 0.5 times the subcarrier spacing; 15. The method of any one of claims 1 to 14.

16. The third channel is N ＣＢ = i+1 channels, and the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an integer multiple of the subcarrier spacing.

17. 17. The method of claim 16, wherein the spacing between the DC carrier frequency of the third channel and the DC carrier frequency of the first channel is an odd or even multiple of the subcarrier spacing.

18. 18. The method of claim 16 or 17, wherein one subcarrier of the third channel and one subcarrier of the first channel have the same frequency location.

19. A communication device comprising a unit or module configured to perform the method of any one of claims 1 to 18.

20. 19. A computer readable storage medium configured to store a computer program, the computer program comprising instructions used to perform the method of any one of claims 1 to 18.

21. A chip comprising a processor and an interface, the chip being configured to call from a memory a computer program stored in said memory and to execute said computer program to perform the method of any one of claims 1 to 18.

22. A computer program product comprising computer program code, said computer program code being used to implement a method according to any one of claims 1 to 18.

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