A communication method and apparatus

Abstract

This application discloses a communication method and apparatus. It is applicable to the 802.11 series of standard protocols, including but not limited to: 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, and 802.11bn. The method includes: receiving a trigger frame, which indicates a DRU allocated to a site; and transmitting a PPDU on the allocated DRU according to the trigger frame; wherein the discrete bandwidth of the allocated DRU is 60MHz. In this method, the access point allocates a DRU with a discrete bandwidth of 60MHz to the site, and the site transmits PPDUs based on the DRU with a discrete bandwidth of 60MHz, which can increase the transmission power of the site to achieve higher gain without increasing the power spectral density.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus. Background Technology

[0002] Regarding the 6GHz spectrum, a low-power indoor (LPI) communication method has been defined. In this method, the transmission power of a device is limited by both the maximum power and the maximum power spectral density. For example, the transmission power of a station cannot exceed the set maximum power, and the station's power spectral density cannot exceed the set maximum power spectral density, which significantly restricts the station's transmission power.

[0003] How to increase the transmission power of a station to achieve higher gain without increasing the power spectral density has become an urgent problem to be solved. Summary of the Invention

[0004] This application provides a communication method and apparatus that can increase the transmission power of a station to achieve higher gain without increasing the power spectral density.

[0005] Firstly, a communication method is provided, which can be executed by a site or by a chip or module within the site. Taking the method executed by the site as an example: receiving a trigger frame, the trigger frame indicating a distributed resource unit (DRU) allocated to the site; transmitting a physical layer protocol data unit (PPDU) on the allocated DRU according to the trigger frame; wherein the discrete bandwidth of the allocated DRU is 60MHz.

[0006] Secondly, a communication method is provided, which can be executed by an access point or by a chip or module within the access point. Taking the method executed by the access point as an example: a trigger frame is sent to indicate the DRU allocated to the site; a PPDU is received on the allocated DRU; wherein the discrete bandwidth of the allocated DRU is 60MHz.

[0007] In this embodiment of the application, the access point allocates a DRU with a discrete bandwidth of 60MHz to the site. The site transmits PPDU based on the DRU with a discrete bandwidth of 60MHz, which can improve the transmission power of the site to obtain higher gain without increasing the power spectral density.

[0008] As an example, the 60MHz discrete bandwidth could be the bandwidth of the remaining channels when the highest 20MHz channel is not used on an 80MHz bandwidth.

[0009] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 3A; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 3A:

[0010] Table 3A

[0011]

[0012] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the DRUs shown in Table 3B; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the DRUs shown in Table 3B.

[0013] Table 3B

[0014]

[0015] In conjunction with the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 3C; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 3C.

[0016] Table 3C

[0017]

[0018] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 3D; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 3D.

[0019] Table 3D

[0020]

[0021] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 3E; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 3E.

[0022] Table 3E

[0023]

[0024] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 3F; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 3F:

[0025] Table 3F

[0026]

[0027] Any of the above design methods clarifies which subcarriers are included in one or more DRUs on a 60MHz discrete bandwidth. Based on the design of this DRU, the PAPR of the site can be reduced while the transmission power of the site can be increased.

[0028] Furthermore, in any of the above design methods, the size of the DRU is the same as the size of the rRU contained in the regular resource unit (rRU) tone plan when the highest 20MHz channel is not used on an 80MHz bandwidth. The number of DRUs is the same as the number of rRUs contained in the rRU tone plan when the highest 20MHz channel is not used on an 80MHz bandwidth. The hierarchical relationship between DRUs of different sizes is the same as the hierarchical relationship between rRUs of different sizes contained in the rRU tone plan when the highest 20MHz channel is not used on an 80MHz bandwidth. Therefore, the indication method of these DRUs can reuse the indication method of rRUs, which can reduce the complexity of implementation and testing.

[0029] In addition, the DRU provided by any of the above design methods has its subcarriers uniformly distributed over a 60MHz discrete bandwidth or the subcarrier spacing varies according to the same rule, which can reduce the complexity of the channel smoothing algorithm.

[0030] In conjunction with the first or second aspect, in one possible design, the assigned DRU belongs to multiple predefined DRUs, and the multiple predefined DRUs satisfy one or more of the following:

[0031] Multiple predefined DRUs include 26-tone DRUs; among the subcarriers with positive subcarrier indices included in a 26-tone DRU, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 27; among the subcarriers with negative subcarrier indices included in a 26-tone DRU, the absolute value of the difference between the largest subcarrier index among the subcarrier indices with negative values ​​and the smallest subcarrier index among the subcarrier indices with positive values ​​is an integer multiple of 27;

[0032] Multiple predefined DRUs include 242-tone-DRUs; among the subcarriers with positive subcarrier indices contained in a 242-tone-DRU, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 3; among the subcarriers with negative subcarrier indices contained in a 242-tone-DRU, the absolute value of the difference between the largest subcarrier index among the subcarrier indices with negative values ​​and the smallest subcarrier index among the subcarrier indices with positive values ​​is an integer multiple of 3;

[0033] Multiple predefined DRUs include 52-tone-DRUs; in a 52-tone-DRU containing subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers cycles through 15 and 12; in a 52-tone-DRU containing subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers cycles through 15 and 12.

[0034] Multiple predefined DRUs include 106-tone-DRU; in 106-tone-DRU, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers varies in a cycle of 6, 9, 6, 6; in 106-tone-DRU, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers varies in a cycle of 6, 9, 6, 6.

[0035] This design approach clarifies the design rules for the subcarriers of the DRU. A DRU that meets these rules allows the site to increase transmit power while still satisfying PAPR (Packet Arrangement Per Parameter) requirements; a DRU that meets these rules can reuse the rRU (Recency Routine Root) indication method, reducing implementation and testing complexity; and a DRU that meets these rules, with its subcarriers evenly distributed across a 60MHz discrete bandwidth or with subcarrier spacing varying according to the same pattern, reduces the complexity of channel smoothing algorithms.

[0036] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the DRUs shown in Table 4; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the DRUs shown in Table 4.

[0037] Table 4

[0038]

[0039] The pilot design given in Table 4 is based on the tone plan given in Table 3A. When the tone plan shown in Table 3A changes, the distribution of pilot subcarriers also changes accordingly. For example, all DRUs in the tone plan shown in Table 3A can be shifted to the right by k, that is, the subcarrier index of all DRUs is increased by k at the same time. Then the subcarrier index of all pilot subcarriers contained in all DRUs is also increased by k at the same time. k can be 0 or 1, for example.

[0040] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the multiple DRUs shown in Table 6; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the multiple DRUs shown in Table 6.

[0041] Table 6

[0042]

[0043] The pilot design given in Table 6 is based on the tone plan given in Table 3A. When the tone plan shown in Table 3A changes, the distribution of pilot subcarriers also changes accordingly. For example, all DRUs in the tone plan shown in Table 3A can be shifted to the right by k, that is, the subcarrier index of all DRUs is increased by k at the same time. Then the subcarrier index of all pilot subcarriers contained in all DRUs is also increased by k at the same time. k can be 0 or 1, for example.

[0044] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the DRUs shown in Table 9; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the DRUs shown in Table 9.

[0045] Table 9

[0046]

[0047] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the DRUs shown in Table 12; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the DRUs shown in Table 12.

[0048] Table 12

[0049]

[0050] In conjunction with either the first or second aspect, in one possible design, the assigned DRU is any one of the DRUs shown in Table 14; or, the assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the DRUs shown in Table 14.

[0051] Table 14

[0052]

[0053] Each of the above design methods clearly defines which subcarriers of the DRU serve as pilot subcarriers. These DRU pilot designs ensure that the channel coefficients of the pilot subcarriers can be obtained through interpolation during multi-stream transmission, and that the channel coefficients of the pilot subcarriers can be denoised using channel smoothing algorithms, thereby improving the channel estimation accuracy of the pilot subcarriers and ultimately improving phase tracking accuracy.

[0054] The pilot subcarriers of the multiple DRUs provided by any of the above design methods are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference on the performance of the receiver.

[0055] In any of the above design methods, the hierarchical relationship between the pilot subcarriers of DRUs of different sizes is the same as the hierarchical relationship between the pilot subcarriers of rRUs of different sizes included in an 80M bandwidth when the highest 20M channel is not used, which helps to simplify the implementation of pilot processing.

[0056] Thirdly, a communication device is provided, comprising a module for performing the method as described in the first aspect or any possible design of the first aspect.

[0057] For example, the device may include a processing module and a transceiver module.

[0058] The processing module controls the transceiver module to receive trigger frames, which indicate the DRUs allocated to the site; and controls the transceiver module to send PPDUs on the allocated DRUs according to the trigger frames; wherein the discrete bandwidth of the allocated DRUs is 60MHz.

[0059] Fourthly, a communication device is provided, comprising a module for performing the method as described in the second aspect or any possible design of the second aspect.

[0060] For example, the device may include a processing module and a transceiver module.

[0061] The processing module controls the transceiver module to send trigger frames, which indicate the DRUs allocated to the site; and controls the transceiver module to receive PPDUs on the DRUs allocated to the site; wherein the discrete bandwidth of the allocated DRU is 60MHz.

[0062] Fifthly, a communication device is provided, comprising at least one processor; and a communication interface communicatively connected to said at least one processor; said at least one processor, by executing instructions stored in a memory, causes the method described in the first aspect or any possible design of the first aspect to be executed, or causes the method described in the second aspect or any possible design of the second aspect to be executed.

[0063] A sixth aspect provides a computer-readable storage medium storing a computer program or instructions that, when executed, cause the method described in the first aspect or any possible design of the first aspect to be implemented, or cause the method described in the second aspect or any possible design of the second aspect to be implemented.

[0064] A seventh aspect provides a computer program product including instructions that, when run on a computer, cause the method described in the first aspect or any possible design of the first aspect to be implemented, or cause the method described in the second aspect or any possible design of the second aspect to be implemented.

[0065] Eighth aspect, a communication system is provided, including a station and an access point, wherein the station is configured to perform the method as described in the first aspect or any possible design of the first aspect, and the access point is configured to perform the method as described in the second aspect or any possible design of the second aspect. Attached Figure Description

[0066] Figure 1 This is a schematic diagram of the architecture of a wireless communication system applicable to the embodiments of this application;

[0067] Figure 2 A schematic diagram of the tone plan corresponding to a bandwidth of 20MHz;

[0068] Figure 3 A schematic diagram of the tone plan corresponding to a bandwidth of 40MHz;

[0069] Figure 4 A schematic diagram of the tone plan corresponding to an 80MHz bandwidth;

[0070] Figure 5 A schematic diagram of uplink multi-user transmission;

[0071] Figure 6 A flowchart illustrating a communication method provided in an embodiment of this application;

[0072] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0073] Figure 8 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0074] Figure 9 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0075] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0076] In this application embodiment, the number of nouns, unless otherwise specified, refers to "singular nouns or plural nouns," that is, "one or more." "At least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0077] The ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the third parameter and the second parameter can be the same parameter or different parameters, and such names do not indicate that the content, application scenario, priority, or importance of the two parameters are different. In addition, the numbering of steps in the various embodiments described in this application is only to distinguish different steps and is not used to limit the order of steps.

[0078] The technical solution provided in this application can be applied to various communication systems, such as systems using the Wireless Local Area Network (WLAN) communication protocol, which may include the 802.11 standard protocol. The 802.11 standard protocol includes, but is not limited to, 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, 802.11be, and 802.11bn. Specifically, 802.11n is called high throughput (HT), 802.11ac is called very high throughput (VHT), 802.11ax is called high efficient (HE), 802.11be is called extremely high throughput (EHT), and 802.11bn is called ultra-high reliability (UHR). Of course, with the continuous evolution and development of communication technology, the 802.11 standard protocol may include even more protocols.

[0079] The technical solutions of this application are applicable to scenarios including communication between an access point (AP) and one or more stations (STAs), communication between APs, or communication between STAs. In the embodiments of this application, the term "communication" can also be described as "data transmission," "information transmission," or "transmission," etc.

[0080] See Figure 1 , Figure 1 This is a schematic diagram of the architecture of a wireless communication system applicable to embodiments of this application. For example... Figure 1 As shown, the wireless communication system may include one or more APs (such as...) Figure 1 AP100 in the middle) and one or more STAs (such as AP10 ... Figure 1 (STA200 and STA300 in the example). Both the AP and STA support WLAN communication protocols, including the 802.11 protocol.

[0081] Taking WLAN as an example, the device for implementing the method of this application can be an AP or STA in WLAN, or a chip or processing system installed in the AP or STA.

[0082] Optionally, the access point involved in this application (such as...) Figure 1An AP100 is a device with wireless communication capabilities, supporting communication using the WLAN protocol. It has the ability to communicate with other devices (such as stations or other access points) in a WLAN network, and can also communicate with other devices. In a WLAN system, an access point can be called an access point station (AP STA). This wireless communication device can be a complete device, or it can be a chip or processing system installed in a complete device. Devices with these chips or processing systems can implement the methods and functions of the embodiments of this application under the control of the chip or processing system. The AP in the embodiments of this application is a device that provides services to STAs and can support the 802.11 series of protocols. For example, an AP can be a communication server, router, switch, bridge, or other communication entity; an AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, an AP can also be the chip and processing system within these various forms of devices, thereby implementing the methods and functions of the embodiments of this application.

[0083] Optionally, the sites involved in this application (such as...) Figure 1 A STA200 or STA300 is a device with wireless communication capabilities, supporting communication using the WLAN protocol and having the ability to communicate with other stations or access points in a WLAN network. In a WLAN system, a station can be called a non-access point station (non-AP STA). For example, an STA is any user communication device that allows a user to communicate with an AP and thus with the WLAN. This device with wireless communication capabilities can be a complete device or a chip or processing system installed in a complete device. Devices with these chips or processing systems installed can implement the methods and functions of the embodiments of this application under the control of the chip or processing system. For example, an STA can be a network-connected user device such as a tablet computer, desktop computer, laptop computer, ultra-mobile personal computer (UMPC), handheld computer, netbook, personal digital assistant (PDA), or mobile phone; or an IoT node in the Internet of Things; or an in-vehicle communication device in the Internet of Vehicles; or an entertainment device, gaming device or system; or a GPS device; etc. An STA can also be a chip and processing system in the above-mentioned terminals.

[0084] WLAN systems can provide high-speed, low-latency transmission. As WLAN application scenarios continue to evolve, WLAN systems will be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry, the banking industry, enterprise offices, stadiums and exhibition halls, concert halls, hotel rooms, dormitories, hospital wards, classrooms, shopping malls, squares, streets, production workshops and warehouses, etc. Of course, devices supporting WLAN communication (such as access points or sites) can be sensor nodes in smart cities (e.g., smart water meters, smart electricity meters, smart air quality monitoring nodes), smart devices in smart homes (e.g., smart cameras, projectors, displays, televisions, speakers, refrigerators, washing machines, etc.), nodes in the Internet of Things (IoT), entertainment terminals (e.g., augmented reality (AR), virtual reality (VR) wearable devices), smart devices in smart offices (e.g., printers, projectors, loudspeakers, speakers, etc.), vehicle-to-everything (V2X) devices, infrastructure in daily life scenarios (e.g., vending machines, supermarket self-service navigation kiosks, self-checkout machines, self-ordering machines, etc.), and equipment in large sports and music venues, etc. The specific forms of STA and AP in this application embodiment are not limited; they are merely illustrative examples.

[0085] It is understood that the system architecture described in the embodiments of this application is for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided in the embodiments of this application.

[0086] The above briefly describes the system architecture of the embodiments of this application. In order to better understand the technical solutions of the embodiments of this application, the technical features involved in the embodiments of this application are introduced below.

[0087] I. Tone planning based on resource unit (RU):

[0088] Regarding bandwidth configuration, 802.11ax supports the following bandwidth configurations: 20MHz, 40MHz, 80MHz, 160MHz, and 80+80MHz. The difference between 160MHz and 80+80MHz is that the former is a continuous frequency band, while the latter's two 80MHz bands can be separated. In 802.11be, carrier planning (toneplan) will be supported for configurations such as 240MHz / 160+80MHz and 320MHz / 160+160MHz. The 802.11be standard allocates resources based on resource units (RUs). For an RU, the corresponding tone plan may differ depending on the bandwidth. The tone plan corresponding to a bandwidth refers to the subcarrier distribution defined based on the RU within a certain bandwidth range.

[0089] For example, refer to Figure 2 This diagram illustrates the tone plan corresponding to a 20MHz bandwidth. When the bandwidth is 20MHz, the entire bandwidth can consist of a single 242-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, and 106-tone RUs. Each RU includes data subcarriers and pilot subcarriers. The data subcarriers carry data information, and the pilot subcarriers are used for phase and frequency offset estimation. In addition to the RUs, there are also guard subcarriers, empty subcarriers, or direct current (DC) subcarriers, etc.

[0090] For example, refer to Figure 3 This is a schematic diagram of the tone plan corresponding to a 40MHz bandwidth. When the bandwidth is 40MHz, the entire bandwidth is roughly equivalent to a replication of a 20MHz subcarrier distribution. The entire bandwidth can be composed of a single 484-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, and 242-tone RUs.

[0091] For example, refer to Figure 4 This is a schematic diagram of the tone plan corresponding to an 80MHz bandwidth. When the bandwidth is 80MHz, the entire bandwidth consists of four resource units of 242-tone RUs. The entire bandwidth can be composed of a whole 996-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, and 484-tone RUs, such as... Figure 4As shown in the diagram. 484L and 484R represent the left and right halves of the 484-tone RU, respectively, each containing 242 subcarriers, and are another schematic diagram of 484+5DC.

[0092] When the bandwidth is 160MHz, the entire bandwidth can be viewed as a replica of two 80MHz subcarrier distributions. The entire bandwidth can consist of a single 2*996-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, 484-tone RUs, and 996-tone RUs. When the bandwidth is 320MHz, the entire bandwidth can be viewed as a replica of four 80MHz subcarrier distributions; due to space limitations, a separate diagram is not provided here.

[0093] The various subcarrier distributions described above are in units of 242-tone RUs. The left side of the diagram represents the lowest frequency, and the right side represents the highest frequency. From left to right, the 242-tone RUs can be numbered: 1st, 2nd, ..., 16th. It should be noted that the frequency domain resources for the transmitted data field include up to 16 242-tone RUs, which correspond one-to-one with 16 20MHz channels in ascending frequency order. In addition to the RU types mentioned above, 802.11be also introduces a 52+26-tone RU consisting of a 52-tone RU and a 26-tone RU; a 106+26-tone RU consisting of a 106-tone RU and a 26-tone RU; a 484+242-tone RU consisting of a 484-tone RU and a 242-tone RU; a 996+484-tone RU consisting of a 996-tone RU and a 484-tone RU; a 2*996+484-tone RU consisting of two 996-tone RUs and a 484-tone RU; a 3*996-tone RU consisting of three 996-tone RUs; and a 3*996+484-tone RU consisting of three 996-tone RUs and a 484-tone RU. In terms of bandwidth, a 26-tone RU corresponds to approximately 2MHz, a 52-tone RU to approximately 4MHz, a 106-tone RU to approximately 8MHz, and a 242-tone RU to approximately 20MHz. The dimensions of other RUs can be calculated by addition or multiplication, which will not be elaborated here. It should be understood that the symbol "*" in this article represents "multiplied" or "multiplied by".

[0094] The tone plan described above can also be called a regular resource unit (rRU). In some embodiments, multiple RUs are merged into one RU, which can be called a multiple resource unit (MRU). In the embodiments of this application, unless otherwise specified, RU and rRU can be used interchangeably.

[0095] II. Uplink Multi-User Transmission:

[0096] In 802.11ax and 802.11be, uplink multi-user transport is an important technology. See also Figure 5 This is a schematic diagram of trigger-based uplink multi-user transmission. The trigger-based uplink multi-user transmission process includes: the AP sending a trigger frame to trigger uplink multi-user transmission. The trigger frame carries the identifier information and resource allocation information of one or more stations; after receiving the trigger frame, each station uses an extremely high throughput trigger-based physical layer protocol data unit (EHT TB PPDU) to send uplink data frames on the corresponding RU, and receives a block acknowledgment (BA) frame sent by the AP after a short interframe space (SIFS).

[0097] For example, the RU or MRU assigned to the STA can be indicated by the following subfields in the user information field in EHT form in the trigger frame: RU Allocation subfield, Uplink Bandwidth subfield in the common information field, Uplink Bandwidth Extension subfield in the special user information field, and Master-Slave 160 subfield.

[0098] In the public information field, B55 indicates whether a special user information field exists in the user information field. For EHT TB PPDU, its bandwidth is jointly determined by the UL BW subfield and the UL BW Extension subfield in the special user information field. The mapping relationship between B0 in the RU Allocation subfield, B7-B1 in the RU Allocation, and PS160 is shown in Table 1. The bandwidth is jointly determined by the UL BW subfield and the UL BW Extension subfield; N can be obtained by the formula: N = 2 × X1 + X0. The values ​​of X1 and X0 can be found in Table 2, which describes the transformation from logical parameters PS160 and B0 to physical parameters X1 and X0. The frequency band configuration in Table 2 refers to the order of P80, S80, and S160 in absolute frequency, from left to right, representing from low frequency to high frequency. Among them, P80 represents the primary 80MHz channel, S80 represents the secondary 80MHz channel, and S160 represents the secondary 160MHz channel.

[0099] Table 1. Interpretation of the 802.11be Triggered Frame Resource Unit Allocation Subfield and PS160 Subfield

[0100]

[0101]

[0102]

[0103]

[0104] Table 2 Transformation from Logical Parameters to Physical Parameters

[0105]

[0106]

[0107] It should be understood that the frequency band configuration in Table 2 refers to the order of P80, S80, and S160 in absolute frequencies, from left to right representing from low to high frequency. For example, [P80 S80] indicates that the primary 80MHz channel is the first 80MHz channel from low to high frequency, and the secondary 80MHz channel is the second 80MHz channel from low to high frequency; or, [P80 S80] indicates that the primary 80MHz channel is a low 80MHz channel, and the secondary 80MHz channel is a high 80MHz channel. As another example, [S80 P80 S160] indicates that the secondary 80MHz channel is a low 80MHz channel within a low 160MHz channel, the primary 80MHz channel is a high 80MHz channel within a low 160MHz channel, and the secondary 160MHz channel is a high 160MHz channel.

[0108] IV. Low Power Indoor (LPI):

[0109] Regarding the 6GHz spectrum, a low-power indoor communication method is defined, imposing strict limitations on the maximum transmit power and maximum power spectral density of devices. The transmit power of a device is limited by both the maximum power and the maximum power spectral density; firstly, the transmit power cannot exceed the maximum power value, and secondly, the transmit power spectral density cannot exceed the maximum power spectral density. Compared to the maximum power, the limitation on the maximum power spectral density is more stringent; the maximum transmit power of a device is typically limited more by the power spectral density.

[0110] For example, the maximum power is 24 dBm, and the maximum power spectral density is -1 dBm / MHz. For a station, the specified maximum power limit is reached only when the bandwidth is at its maximum of 320 MHz. Below 320 MHz bandwidth, due to the limitation of the maximum power spectral density, only lower power can be transmitted.

[0111] For example, the maximum power is 23dBm, and the maximum power spectral density is 10dBm / MHz. When the bandwidth does not exceed 20MHz, the transmission power of the AP / STA is mainly limited by the power spectral density, while when the bandwidth is greater than 20MHz, the transmission power of the AP / STA is mainly limited by the maximum power.

[0112] V. Distributed Resource Unit (DRU) Technology:

[0113] DRU (Distributed Resource Unit) technology refers to discretizing the finite number of subcarriers in a rRU (e.g., a 26-tone RU) across a larger bandwidth, i.e., more subcarriers (e.g., an odd number of subcarriers in two 26-tone RUs). The discrete range of the subcarriers is called the distributed bandwidth (DBW). The discrete subcarriers together constitute the DRU. The distributed resource unit can also be called a discrete resource unit.

[0114] Similar to rRUs, DRUs can have different sizes. The size of a DRU refers to the number of subcarriers it contains. The size of the DRU obtained by discretizing an rRU is the same as the size of the original rRU. The index of the DRU obtained by discretizing an rRU can reuse the index of the original rRU.

[0115] In LPI communication scenarios, when the bandwidth of the rRU is small, the transmission power of the station is significantly limited due to the strict limitation of power spectral density. Discretizing the subcarriers of the rRU across a larger bandwidth can improve the transmission power, but it is not yet clear which subcarriers are included in the resulting DRU.

[0116] Therefore, this application provides a 60MHz discrete bandwidth DRU tone plan design, which clearly defines which subcarriers the DRU includes and which subcarriers serve as pilot subcarriers. The DRU can be applied to uplink or downlink transmission. Taking trigger-based uplink multi-user transmission as an example, the 60MHz discrete bandwidth DRU tone plan design provided in this application can improve the transmission power of each user (e.g., a site) under specific bandwidth and power spectral density requirements. Furthermore, the DRU indication method can reuse the rRU indication method, reducing implementation complexity.

[0117] The technical solution provided in this application will be described in detail below with reference to more accompanying drawings.

[0118] See Figure 6 The flowchart of a communication method provided in this application embodiment includes the following steps S101 to S103:

[0119] S101. The access point sends a trigger frame, and the corresponding site receives the trigger frame.

[0120] Trigger frames are used to indicate the DRUs assigned to a site, or in other words, trigger frames are used to indicate the DRUs assigned to a site by an access point. In specific applications, a site may be assigned one or more DRUs. For ease of description, this article mainly uses the example of a site being assigned one DRU.

[0121] As an example, the DRU assigned to a site can be indicated by the following subfields in the trigger frame: RU Allocation subfield, Uplink Bandwidth subfield in the Common Information field, Uplink Bandwidth Extension subfield in the Special User Information field, and PS160 subfield. For specific indication methods, please refer to the relevant descriptions in Tables 1 and 2 above.

[0122] In one possible implementation, the indication method of DRU can reuse the indication method of rRU; for example, the index of DRU can reuse the index of rRU. In this way, the implementation complexity can be reduced.

[0123] S102. The station sends a PPDU on the assigned DRU according to the trigger frame, and the access point receives the PPDU on the assigned DRU of the station accordingly.

[0124] As an example, this PPDU could be an ultra-high reliability (UHR) TB PPDU. Of course, as standards change, this PPDU could also be other types of PPDUs, without limitation.

[0125] Understandably, in practical applications, an access point can assign DRUs to multiple sites simultaneously. For example, a trigger frame can contain indication information of DRUs assigned to multiple different sites, thereby enabling multi-user uplink transmission.

[0126] In this embodiment, the discrete bandwidth of the DRU allocated to the site is 60MHz, or in other words, the discrete bandwidth of the DRU allocated to the site by the access point is 60MHz (60MHz can be abbreviated as 60M). As an example, this 60MHz specifically refers to the remaining channels on an 80MHz (80MHz can be abbreviated as 80M) bandwidth when the highest 20MHz channel is not used (e.g., the highest 20MHz is punctured or unallocated), that is, the bandwidth of the lowest 60MHz channel on the 80MHz bandwidth.

[0127] In one possible design, a site is assigned one of a plurality of DRUs. For example, these plurality of DRUs could be the plurality of DRUs shown in Table 3A.

[0128] Alternatively, the DRUs assigned to a site belong to multiple predefined DRUs. It is understood that some of these predefined DRUs may be assigned or used for allocation, or all of them may be assigned or used for allocation, depending on the specific implementation; this application does not impose any restrictions on this. Alternatively, the access point may only know some of the DRUs among these multiple predefined DRUs, or it may know all of them, depending on the specific implementation; this application does not impose any restrictions on this. For example, these multiple predefined DRUs may be the multiple DRUs shown in Table 3A, or the multiple predefined DRUs may belong to the multiple DRUs shown in Table 3A, or the multiple predefined DRUs may contain at least some of the DRUs shown in Table 3A.

[0129] Table 3A

[0130]

[0131] The explanation of Table 3A is as follows:

[0132] The examples in Table 3A in the form of "X-tone DRU" represent DRUs of size X (i.e., containing X subcarriers). For example, a 26-tone DRU represents a DRU of size 26 (i.e. containing 26 subcarriers), which can be obtained by discretizing a 26-tone DRU to a bandwidth of 60MHz; a 52-tone DRU represents a DRU of size 52 (i.e. containing 52 subcarriers), which can be obtained by discretizing a 52-tone DRU to a bandwidth of 60MHz, and so on.

[0133] The example in Table 3A, such as “DRU Y”, represents the DRU with index Y. Specifically, DRU Y in the row containing X-tone DRUs represents the X-tone DRU with index Y. For example, DRU1 in the row containing 26-tone DRUs in Table 3A represents the 26-tone DRU with index 1.

[0134] The example in Table 3A, in the form "i = 1: a" (where a is 27, 12, 6, or 3), indicates that the absolute value of the difference in indices of adjacent subcarriers within the subcarriers contained in the DRU of that example row is a. In other words, the absolute value of the difference in indices of adjacent subcarriers within the DRU of that example row is a times the absolute value of the difference in indices of adjacent subcarriers within the rRU corresponding to that DRU. It can be understood that adjacent subcarriers, as referred to in this article, are subcarriers that are adjacent in bandwidth; for example, the first subcarrier -500 and the second subcarrier -473 in a 26-tone DRU1 are adjacent subcarriers.

[0135] The examples in Table 3A in the form "a:i:b" refer to an index sequence with a starting index of a, an index interval (i.e., the absolute value of the difference between adjacent indices) of i, and an ending index of b. For example, "-500:27,-41" represents the sequence "-500, -500+27, -500+27*2, ..., -41-27*2, -41-27, -41".

[0136] In Table 3A, the example "DRU Y1=X2-tone DRU[Y3,Y4]" in the row containing "X1-tone DRU" indicates that the X1-tone DRU at index Y1 contains X2 subcarriers that are the same as the X2 subcarriers in the X2-tone DRU at index Y2, and X2 subcarriers that are the same as the X2 subcarriers in the X2-tone DRU at index Y3. For example, in Table 3A, the row containing 52-tone-DRU contains DRU1=26-tone-DRU[1,2], which means that the 52 subcarriers in the 52-tone-DRU at index 1 contain 26 subcarriers that are the same as the 26 subcarriers in the 26-tone-DRU at index 1, and 26 subcarriers that are the same as the 26 subcarriers in the 26-tone-DRU at index 2.

[0137] In Table 3A, the example "DRU Y1=X2-tone DRU[Y3,Y4],m,n" in the row containing "X1-tone DRU" indicates that the X1-tone DRU with index Y1 contains X2 subcarriers that are the same as the X2 subcarriers contained in the X2-tone DRU with index Y2, and X2 subcarriers that are the same as the X2 subcarriers contained in the X2-tone DRU with index Y3, as well as subcarriers with subcarrier indices m and n. For example, in Table 3A, the row containing 106-tone-DRU, "DRU1=26-tone-DRU[1~4],229,235", indicates that among the 106 subcarriers contained in 106-tone-DRU with index 1, 26*4 subcarriers are the same as the subcarriers contained in 26-tone-DRU with indices 1~4. In addition, it also contains the subcarrier with subcarrier index 229 and the subcarrier with subcarrier index 235.

[0138] It is understood that the above explanation applies not only to the examples given in Table 3A, but also to other examples given in this application. If there are the same or similar examples below, the explanation will not be repeated.

[0139] In one possible implementation, the example given in Table 3A can be used as a 60MHz discrete bandwidth DRU tone plan (abbreviated as 60M DBW DRU tone plan). The 60MHz discrete bandwidth is the remaining 60MHz after removing the highest 20MHz from the 80MHz bandwidth. Therefore, the 60M DBW DRU tone plan is also called an 80MHz bandwidth 60M DBW DRU tone plan.

[0140] As can be seen from Table 3A, this DRU tone plan meets the following characteristics:

[0141] 1) The available subcarrier index range for DRU is [-500:-12,12:253], and the location of the guard subcarrier can be aligned with the rRU tone plan over an 80MHz bandwidth (e.g., Figure 4 The positions of the guard subcarriers in the tone plan shown are the same, for example, [-512:-501] and [254:255]. The positions of the DC subcarriers in the DRU tone plan can be the same as the positions of the DC subcarriers in the rRU tone plan with an 80MHz bandwidth, for example, [-11:11].

[0142] It is understood that examples of the form [x:y] in this document represent a sequence from x to y, such as [-11:11] which means: -11, -10, -9, ..., 9, 10, 11. This explanation also applies to other examples given in this application, and will not be repeated in the following text if there are identical or similar examples.

[0143] In this way, the DRU tone plan can reuse the implementation and testing conditions of the existing rRUtone plan when the highest 20M channel on the 80M bandwidth is not in use, which can reduce the complexity of implementation and testing.

[0144] 2) The size of the DRU included in the DRU tone plan shown in Table 3A is the same as the rRU tone plan when the highest 20M channel on the 80MHz bandwidth is not used (e.g., Figure 4 The tone plan shown contains rRUs of the same size, such as 26-tone DRU, 52-tone DRU, 106-tone DRU, 242-tone DRU, etc.

[0145] The number of DRUs included in the tone plan shown in Table 3A is the same as the number of rRUs included in the rRU tone plan when the highest 20M channel on the 80MHz bandwidth is not used. For example, there are 27 26-tone DRUs, 12 52-tone DRUs, 6 106-tone DRUs, and 3 242-tone DRUs.

[0146] The hierarchical relationship between DRUs of different sizes in the tone plan shown in Table 3A is the same as the hierarchical relationship between rRUs of different sizes in the rRU tone plan when the highest 20MHz channel on an 80MHz bandwidth is not used. For example, the hierarchical relationship between 26-tone DRUs and 52-tone DRUs is the same as the hierarchical relationship between 26-tone RUs and 52-tone RUs. Specifically, the subcarrier index of the subcarrier contained in the 52-tone DRU is the same as the subcarrier index of the subcarrier contained in the two 26-tone DRUs. In this way, the indication method of DRUs can reuse the indication method of rRUs. For example, the information used to indicate the 26-tone DRU with index 1 in the trigger frame is the same as the information used to indicate the 26-tone RU with index 1 in the trigger frame, the information used to indicate the 106-tone DRU with index 2 in the trigger frame is the same as the information used to indicate the 106-tone RU with index 2 in the trigger frame, and so on.

[0147] 3) Any 26-tone-DRU satisfies the following: In subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 27 (or in other words, there is a 26-subcarrier interval between any two adjacent subcarriers); In subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 27 (or in other words, there is a 26-subcarrier interval between any two adjacent subcarriers).

[0148] It is understood that, in the embodiments of this application, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers can also be called the subcarrier index spacing, subcarrier index interval, subcarrier spacing, or subcarrier interval, etc. For any DRU, the range of subcarriers with positive subcarrier indices can also be called the positive half-frequency of that DRU, and the range of subcarriers with negative subcarrier indices can also be called the negative half-frequency of that DRU.

[0149] Thus, the 26-tone-DRU has at most one subcarrier of the 26-tone-DRU in every 1MHz of discrete bandwidth of 60MHz, which can achieve a power amplification of 11.14dB.

[0150] Any 26-tone-DRU also satisfies the following: among the subcarrier indices of the included subcarriers, the absolute value of the difference between the largest subcarrier index with a negative value and the smallest subcarrier index with a positive value is 54, which is an integer multiple of 27, further reducing the PAPR of the 26-tone-DRU.

[0151] 4) Any 52-tone-DRU satisfies the following: In subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 12 or 15; In subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 12 or 15.

[0152] Thus, the 52-tone-DRU can achieve a power amplification of 8.13dB with a maximum of 2 subcarriers per 1MHz over a discrete bandwidth of 60MHz.

[0153] Any 52-tone-DRU also satisfies the following: for subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers changes cyclically according to 15 and 12, that is, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers is 15, 12, 15, 12, 15... respectively; for subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers changes cyclically according to 15 and 12, that is, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers is 15, 12, 15, 12, 15... respectively.

[0154] This allows the subcarrier index spacing of different 52-tone DRUs to vary according to the same pattern, and also ensures that the subcarrier index spacing of subcarriers with negative and positive subcarrier indices within the same 52-tone DRU varies according to the same pattern, thus reducing the complexity of the channel smoothing algorithm. It can be understood that the channel smoothing algorithm is used to reduce noise in the channel estimation coefficients. The calculation of the coefficients in the channel smoothing algorithm is related to the subcarrier index spacing. By ensuring that the subcarrier index spacing varies according to the same pattern, the variation of the coefficients in the channel smoothing algorithm can be reduced, thereby reducing the complexity of the channel smoothing algorithm and improving the accuracy of channel estimation.

[0155] 5) Any 106-tone-DRU satisfies the following: In subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 6 or 9; In subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 6 or 9.

[0156] Thus, the 106-tone-DRU can achieve a power amplification of 6.37dB with a maximum of 3 subcarriers per 1MHz over a discrete bandwidth of 60MHz.

[0157] Any 106-tone-DRU also satisfies the following: For subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers changes cyclically according to 6, 9, 6, 6, that is, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers is 6, 9, 6, 6, 6, 9, 6, 6, 6, 9, 6, 6…; For subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers changes cyclically according to 6, 9, 6, 6, that is, the absolute value of the difference between the subcarrier indices of two adjacent subcarriers is 6, 9, 6, 6, 6, 9, 6, 6, 6, 9, 6, 6….

[0158] In this way, the subcarrier index spacing of different 106-tone-DRUs can vary according to the same rule, and the subcarrier index spacing of subcarriers with negative subcarrier indices and subcarriers with positive subcarrier indices in the same 106-tone-DRU can vary according to the same rule, which can reduce the complexity of the channel smoothing algorithm.

[0159] 6) Any 242-tone-DRU satisfies the following: In subcarriers with positive subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 3; In subcarriers with negative subcarrier indices, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 3.

[0160] Thus, the 242-tone-DRU can achieve a power amplification of 4.15dB with a maximum of 5 subcarriers per 1MHz over a discrete bandwidth of 60MHz.

[0161] Any 242-tone-DRU also satisfies the following: among the subcarrier indices of the included subcarriers, the absolute value of the difference between the largest subcarrier index with a negative value and the smallest subcarrier index with a positive value is 30, which is an integer multiple of 3, and can further reduce the PAPR of the 242-tone-DRU.

[0162] It is understood that Table 3A is only one possible example. In practical applications, the subcarriers of the DRU shown in Table 3A can be appropriately modified, and the above-mentioned characteristics can still be satisfied after modification.

[0163] In one possible implementation, the subcarriers of each DRU shown in Table 3A can be shifted in the frequency domain to obtain a DRU tone plan with the aforementioned technical effects. Considering that the subcarrier index range of the 60MHz discrete bandwidth is [-500:-12,12:253], all DRUs in the tone plan shown in Table 3A can be shifted to the right by k, that is, the subcarrier indices of all DRUs are simultaneously increased by k, where k can be a natural number, such as 0 or 1. The case where k is 0 can also be interpreted as the subcarriers of all DRUs in the tone plan shown in Table 3A not being shifted.

[0164] Taking a 26-tone-DRU as an example, the subcarrier index of each 26-tone-DRU can be represented as follows:

[0165] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 1 are: [-500+k:27:-41+k, 13+k:27:202+k];

[0166] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 2 are: [-485+k:27:-26+k, 28+k:27:217+k];

[0167] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 3 are: [-494+k:27:-35+k, 19+k:27:208+k];

[0168] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 4 are: [-479+k:27:-20+k, 34+k:27:223+k];

[0169] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 5 are: [-488+k:27:-29+k, 25+k:27:214+k];

[0170] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 6 are: [-497+k:27:-38+k, 16+k:27:205+k];

[0171] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 7 are: [-482+k:27:-23+k, 31+k:27:220+k];

[0172] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 8 are: [-491+k:27:-32+k, 22+k:27:211+k];

[0173] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 9 are: [-476+k:27:-17+k, 37+k:27:226+k];

[0174] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 10 are: [-499+k:27:-40+k, 14+k:27:203+k];

[0175] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 11 are: [-484+k:27:-25+k, 29+k:27:218+k];

[0176] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 12 are: [-493+k:27:-34+k, 20+k:27:209+k];

[0177] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 13 are: [-478+k:27:-19+k, 35+k:27:224+k];

[0178] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 14 are: [-487+k:27:-28+k, 26+k:27:215+k];

[0179] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 15 are: [-496+k:27:-37+k, 17+k:27:206+k];

[0180] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 16 are: [-481+k:27:-22+k, 32+k:27:221+k];

[0181] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 17 are: [-490+k:27:-31+k, 23+k:27:212+k];

[0182] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 18 are: [-475+k:27:-16+k, 38+k:27:227+k];

[0183] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 19 are: [-498+k:27:-39+k, 15+k:27:204+k];

[0184] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 20 are: [-483+k:27:-24+k, 30+k:27:219+k];

[0185] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 21 are: [-492+k:27:-33+k, 21+k:27:210+k];

[0186] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 22 are: [-477+k:27:-18+k, 36+k:27:225+k];

[0187] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 23 are: [-486+k:27:-27+k, 27+k:27:216+k];

[0188] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 24 are: [-495+k:27:-36+k, 18+k:27:207+k];

[0189] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 25 are: [-480+k:27:-21+k, 33+k:27:222+k];

[0190] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 26 are: [-489+k:27:-30+k, 24+k:27:213+k];

[0191] The subcarrier indices of the subcarriers included in the 26-tone-DRU with index 27 are: [-474+k:27:-15+k, 39+k:27:228+k].

[0192] For other DRUs such as 52-tone-DRU, 104-tone-DRU, and 242-tone-DRU, the pattern can be deduced from the 26-tone-DRU described above, and will not be elaborated further.

[0193] As a concrete example, Table 3B is a schematic diagram of the DRU tone plan after shifting all DRUs in the DRU tone plan shown in Table 3A to the right by one subcarrier. Correspondingly, the DRU assigned to a site can also be one of the multiple DRUs shown in Table 3B, or the DRU assigned to a site can belong to multiple predefined DRUs as shown in Table 3B, or the multiple predefined DRUs can be a subset of the multiple DRUs shown in Table 3B, or the multiple predefined DRUs can include at least some of the DRUs shown in Table 3B.

[0194] Table 3B

[0195]

[0196] Optionally, for the case where k=0, in addition to the examples given in Table 3A, the 242-tone DRU can also be:

[0197] 242-tone DRU 1=[-500:3:-14,13:3:247];

[0198] 242-tone DRU 2=[-499:3:-13,14:3:248];

[0199] 242-tone DRU 3=[-498:3:-12,15:3:249].

[0200] The DRU tone plan in this case is shown in Table 3C. Accordingly, the DRU assigned to the site may also be one of the multiple DRUs shown in Table 3C, or the DRU assigned to the site may belong to multiple predefined DRUs as shown in Table 3C, or the multiple predefined DRUs may include at least some of the multiple DRUs shown in Table 3C.

[0201] Table 3C

[0202]

[0203] Optionally, for the case where k=2, the 242-tone DRU can be any of the subcarrier indices of all 242-tone DRUs in Table 3A plus 2 (i.e., Table 3C), or it can be:

[0204] 242-tone DRU 1=[-498:3:-15,12:3:249];

[0205] 242-tone DRU 2=[-497:3:-14,13:3:250];

[0206] 242-tone DRU 3=[-496:3:-13,14:3:251].

[0207] The DRU tone plan in this case is shown in Table 3D. Accordingly, the DRU assigned to a site can also be one of the multiple DRUs shown in Table 3D, or the DRU assigned to a site can belong to multiple predefined DRUs as shown in Table 3D, or the multiple predefined DRUs can be a subset of the multiple DRUs shown in Table 3D, or the multiple predefined DRUs can contain at least some of the multiple DRUs shown in Table 3D.

[0208] Table 3D

[0209]

[0210] Optionally, all 26-tone DRUs, all 52-tone DRUs, and all 106-tone DRUs in Table 3A are shifted 3 units to the right, and the 242-tone DRUs in Table 3A are replaced with:

[0211] 242-tone DRU 1=[-497:3:-14,13:3:250];

[0212] 242-tone DRU 2=[-496:3:-13,14:3:251];

[0213] 242-tone DRU 3=[-495:3:-12,15:3:252].

[0214] The DRU tone plan in this case is shown in Table 3E. Accordingly, the DRU assigned to a site may also be one of the multiple DRUs shown in Table 3E, or the DRU assigned to a site may belong to multiple predefined DRUs as shown in Table 3E, or the multiple predefined DRUs may include at least some of the multiple DRUs shown in Table 3E.

[0215] Table 3E

[0216]

[0217] Optionally, all 26-tone DRUs, all 52-tone DRUs, and all 106-tone DRUs in Table 3A are shifted 3 units to the right, and the 242-tone DRUs in Table 3A are replaced with:

[0218] 242-tone DRU 1=[-500:3:-14,16:3:250];

[0219] 242-tone DRU 2=[-499:3:-13,17:3:251];

[0220] 242-tone DRU 3=[-498:3:-12,18:3:252].

[0221] The DRU tone plan in this case is shown in Table 3F. Accordingly, the DRU assigned to the site may also be one of the multiple DRUs shown in Table 3F, or the DRU assigned to the site may belong to multiple predefined DRUs as shown in Table 3F, or the multiple predefined DRUs may include at least some of the multiple DRUs shown in Table 3F.

[0222] Table 3F

[0223]

[0224] It is understood that the 60M DBW DRU tone plans in the relevant embodiments in Tables 3A to 3F above are designed for an 80MHz bandwidth, specifically for an 80MHz bandwidth without using the highest 20MHz channel (i.e., the lowest 60MHz channel in the discrete bandwidth of the 80MHz bandwidth). For 60M DBW DRU tone plans with larger bandwidths, the design concept of the 80MHz bandwidth 60M DBW DRU tone plan can be referenced.

[0225] For example, for a 160MHz bandwidth, its lowest frequency 80MHz (abbreviated as 80M) sub-block and its highest frequency 80M sub-block can be viewed as a shift of the 80MHz bandwidth. The 80MHz bandwidth contains 1024 subcarriers with an index range of [-512:511], while the 160MHz bandwidth contains 2048 subcarriers with an index range of [-1024:1023]. The subcarrier index of the lowest frequency 80M sub-block in the 160MHz bandwidth can be obtained by adding -512 to the subcarrier index of the 80MHz bandwidth, and the subcarrier index of the lowest frequency 80M sub-block in the 160MHz bandwidth can be obtained by adding 512 to the subcarrier index of the 80MHz bandwidth. Therefore, for the lowest frequency 80M sub-block in the 160MHz bandwidth, if its highest 20M channel is not used (e.g., punctured or unassigned), the remaining portion can be used as a 60MHz discrete bandwidth. The subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of each DRU included in any of the above 60M DBW DRU tone plans plus -512. For the highest frequency 80M sub-block in the 160MHz bandwidth, if its highest 20M channel is not used (punctured or unassigned), the remaining portion can be used as a 60MHz discrete bandwidth. The subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of each DRU included in any of the above 60M DBW DRU tone plans plus 512, as shown in Table 3G. In Table 3F, [DRU_base] represents a 60M DBW DRU tone plan (specifically, any 60M DBW DRU tone plan in Tables 3A to 3F).

[0226] Table 3G

[0227]

[0228] For example, for a 320MHz bandwidth, the lowest, second lowest, second highest, and highest frequency 80MHz sub-blocks can be considered as shifts of the 80MHz bandwidth. The 320MHz bandwidth contains 4096 subcarriers, with an index range of [-2048: 2047]. The subcarrier index of the lowest frequency 80MHz sub-block in the 320MHz bandwidth can be obtained by adding -1536 to the subcarrier index of the 80MHz bandwidth; the subcarrier index of the second lowest frequency 80MHz sub-block in the 320MHz bandwidth can be obtained by adding -512 to the subcarrier index of the 80MHz bandwidth; the subcarrier index of the second highest frequency 80MHz sub-block in the 320MHz bandwidth can be obtained by adding 512 to the subcarrier index of the 80MHz bandwidth; and the subcarrier index of the highest frequency 80MHz sub-block in the 320MHz bandwidth can be obtained by adding 1536 to the subcarrier index of the 80MHz bandwidth. Therefore, for the lowest frequency 80M sub-block in the 320MHz bandwidth, if its highest 20M channel is not used (e.g., punctured or unallocated), the remaining portion can be used as a 60MHz discrete bandwidth. The subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of each DRU included in any of the above 60M DBW DRU tone plans plus -1536; for the second lowest frequency 80M sub-block in the 320MHz bandwidth, if its highest 20M channel is not used (e.g., punctured or unallocated), the remaining portion can be used as a 60MHz discrete bandwidth. The subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of each DRU included in any of the above 80M DRU tone plans plus -512; for the second highest frequency 80M sub-block in the 320MHz bandwidth, if its highest 20M channel is not used (e.g., punctured or unallocated), the remaining portion can be used as a 60MHz discrete bandwidth. The subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of any of the above 60M... The subcarrier index of each DRU included in the DBW DRUtone plan is increased by 512; for the 80M sub-block with the highest frequency in the 320MHz bandwidth, if its highest 20M channel is not used (e.g., punctured or unallocated), the remaining part can be used as a 60MHz discrete bandwidth, and the subcarrier index of each DRU included in its DRU tone plan is the subcarrier index of each DRU included in any of the above 80M DRU tone plans plus 1536, as shown in Table 3G.

[0229] Of course, the above only lists the cases for 60M DBW DRU tone plans with 160MHz and 320MHz bandwidth. For other bandwidths, you can refer to the above design ideas and extrapolate them. They will not be listed here one by one.

[0230] The following describes the pilot design schemes corresponding to the DRU tone plans shown in Tables 3A to 3F:

[0231] In one possible design, among the pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers); among the pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers).

[0232] As an example, based on the DRU tone plan given in Table 3A, the pilot subcarriers of each DRU can be shown in Table 4.

[0233] Table 4

[0234]

[0235] The explanation of Table 4 is as follows:

[0236] In Table 4, the example of "DRU Y[a, b, c, d]" in the row containing "X-tone DRU" indicates that the pilot subcarrier indices of the X-tone DRU with index Y are [a, b, c, d]. For example, DRU1[-473, -176] in the row containing 26-tone DRU indicates that the subcarrier indices of the pilot subcarrier in the 26-tone DRU with index 1 are -473 and -176. DRU1[-473, -374, -275, -209, -176, -77, 103, 169] in the row containing 242-tone DRU indicates that the subcarrier indices of the pilot subcarrier in the 242-tone DRU with index 1 are -473 and -374 and -275 and -209 and -176 and -77 and 103 and 169.

[0237] It is understood that the above explanations apply not only to the examples given in Table 4, but also to other examples given in this application. If there are the same or similar examples below, they will not be explained again.

[0238] It can be seen that the pilot designs given in Table 4 satisfy the following characteristics:

[0239] 1) In any 26-tone-DRU containing subcarriers with negative subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers; in any 26-tone-DRU containing subcarriers with positive subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers.

[0240] For example, see Table 5, which provides a detailed breakdown of the subcarriers of all 26-tone DRUs in Table 4. Each row in Table 5 corresponds to a subcarrier index of a 26-tone DRU; for example, the first row corresponds to 26-tone DRU1, the second row to 26-tone DRU10, the third row to 26-tone DRU19, and so on. The pilot subcarrier indices of each 26-tone DRU in Table 5 are marked in bold.

[0241] Table 5

[0242] -500 -473 -446 -419 -392 -365 -338 -311 -284 -257 -230 -203 -176 -149 -122 -95 -68 -41 13 40 67 94 121 148 175 202 -499 -472 -445 -418 -391 -364 -337 -310 -283 -256 -229 -202 -175 -148 -121 -94 -67 -40 14 41 68 95 122 149 176 203 -498 -471 -444 -417 -390 -363 -336 -309 -282 -255 -228 -201 -174 -147 -120 -93 -66 -39 15 42 69 96 123 150 177 204 -497 -470 -443 -416 -389 -362 -335 -308 -281 -254 -227 -200 -173 -146 -119 -92 -65 -38 16 43 70 97 124 151 178 205 -496 -469 -442 -415 -388 -361 -334 -307 -280 -253 -226 -199 -172 -145 -118 -91 -64 -37 17 44 71 98 125 152 179 206 -495 -468 -441 -414 -387 -360 -333 -306 -279 -252 -225 -198 -171 -144 -117 -90 -63 -36 18 45 72 99 126 153 180 207 -494 -467 -440 -413 -386 -359 -332 -305 -278 -251 -224 -197 -170 -143 -116 -89 -62 -35 19 46 73 100 127 154 181 208 -493 -466 -439 -412 -385 -358 -331 -304 -277 -250 -223 -196 -169 -142 -115 -88 -61 -34 20 47 74 101 128 155 182 209 -492 -465 -438 -411 -384 -357 -330 -303 -276 -249 -222 -195 -168 -141 -114 -87 -60 -33 21 48 75 102 129 156 183 210 -491 -464 -437 -410 -383 -356 -329 -302 -275 -248 -221 -194 -167 -140 -113 -86 -59 -32 22 49 76 103 130 157 184 211 -490 -463 -436 -409 -382 -355 -328 -301 -274 -247 -220 -193 -166 -139 -112 -85 -58 -31 23 50 77 104 131 158 185 212 -489 -462 -435 -408 -381 -354 -327 -300 -273 -246 -219 -192 -165 -138 -111 -84 -57 -30 24 51 78 105 132 159 186 213 -488 -461 -434 -407 -380 -353 -326 -299 -272 -245 -218 -191 -164 -137 -110 -83 -56 -29 25 52 79 106 133 160 187 214 -487 -460 -433 -406 -379 -352 -325 -298 -271 -244 -217 -190 -163 -136 -109 -82 -55 -28 26 53 80 107 134 161 188 215 -486 -459 -432 -405 -378 -351 -324 -297 -270 -243 -216 -189 -162 -135 -108 -81 -54 -27 27 54 81 108 135 162 189 216 -485 -458 -431 -404 -377 -350 -323 -296 -269 -242 -215 -188 -161 -134 -107 -80 -53 -26 28 55 82 109 136 163 190 217 -484 -457 -430 -403 -376 -349 -322 -295 -268 -241 -214 -187 -160 -133 -106 -79 -52 -25 29 56 83 110 137 164 191 218 -483 -456 -429 -402 -375 -348 -321 -294 -267 -240 -213 -186 -159 -132 -105 -78 -51 -24 30 57 84 111 138 165 192 219 -482 -455 -428 -401 -374 -347 -320 -293 -266 -239 -212 -185 -158 -131 -104 -77 -50 -23 31 58 85 112 139 166 193 220 -481 -454 -427 -400 -373 -346 -319 -292 -265 -238 -211 -184 -157 -130 -103 -76 -49 -22 32 59 86 113 140 167 194 221 -480 -453 -426 -399 -372 -345 -318 -291 --264 -237 -210 -183 -156 -129 -102 -75 -48 -21 33 60 87 114 141 168 195 222 -479 -452 -425 -398 -371 -344 -317 -290 -263 -236 -209 -182 -155 -128 -101 -74 -47 -20 34 61 88 115 142 169 196 223 -478 -451 -424 -397 -370 -343 -316 -289 -262 -235 -208 -181 -154 -127 -100 -73 -46 -19 35 62 89 116 143 170 197 224 -477 -450 -423 -396 -369 -342 -315 -288 -261 -234 -207 -180 -153 -126 -99 -72 -45 -18 36 63 90 117 144 171 198 225 -476 -449 -422 -395 -368 -341 -314 -287 -260 -233 -206 -179 -152 -125 -98 -71 -44 -17 37 64 91 118 145 172 199 226 -475 -448 -421 -394 -367 -340 -313 -286 -259 -232 -205 -178 -151 -124 -97 -70 -43 -16 38 65 92 119 146 173 200 227 -474 -447 -420 -393 -366 -339 -312 -285 -258 -231 -204 -177 -150 -123 -96 -69 -42 -15 39 66 93 120 147 174 201 228

[0243] For example, in Table 5, the first row is 26-tone DRU1. Among the subcarriers with negative subcarrier indices, the first subcarrier is -500 and the last subcarrier is -41. These are data subcarriers and are not used as pilot subcarriers. Among the subcarriers with positive subcarrier indices, the first subcarrier is 13 and the last subcarrier is 202. These are data subcarriers and are not used as pilot subcarriers.

[0244] It is understandable that in the case of multi-stream transmission, the receiver needs to obtain the channel coefficient at the pilot subcarrier through interpolation. Before the first subcarrier and after the last subcarrier in the subcarrier index with a negative number, and before the first subcarrier and after the last subcarrier in the subcarrier index with a positive number, there are no subcarriers carrying valid information (such as no data subcarriers or pilot subcarriers), so interpolation cannot be performed, and therefore the corresponding channel coefficient cannot be obtained. The channel coefficient of the pilot subcarrier cannot be denoised by the channel smoothing algorithm.

[0245] In this embodiment of the application, the first and last subcarriers of any 26-tone-DRU with negative subcarrier indices are not used as pilot subcarriers, and the first and last subcarriers of any 26-tone-DRU with positive subcarrier indices are not used as pilot subcarriers. This ensures that the channel coefficients at each pilot subcarrier can be obtained by interpolation during multi-stream transmission, and that the channel coefficients at the pilot subcarriers can be denoised using a channel smoothing algorithm, thereby improving the channel estimation accuracy of the pilot subcarriers and the phase tracking accuracy.

[0246] 2) Among the pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers); among the pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers).

[0247] For example, in Table 5, -473 and -462 are adjacent, and the absolute value of their difference is 11; 125 and 136 are adjacent, and the absolute value of their difference is 11, and so on.

[0248] Furthermore, after deducting the subcarriers in each 26-tone-DRU (or each DRU) that cannot be interpolated, there is a 10-subcarrier interval between any two adjacent pilot subcarriers.

[0249] For example, in Table 5, after subtracting columns 18 (i.e., "-41, -40, ..., -15") and 19 (i.e., "13, 14, ..., 39") from left to right, all pilot subcarriers satisfy the condition that there is a 10-subcarrier interval between any two adjacent pilot subcarriers. For example, there is a 10-subcarrier interval between pilot subcarrier -55 and pilot subcarrier -44, i.e., "-54, -53, -52, -51, -50, -49, -48, -47, -46, -45", and there is also a 10-subcarrier interval between pilot subcarrier -44 and pilot subcarrier 48, i.e., "-43, -42, 40, 41, 42, 43, 44, 45, 46, 47".

[0250] As can be seen from Table 5, the pilot subcarriers of all 26-tone-DRUs are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference at the receiver on performance.

[0251] Furthermore, for 26-tone DRUs, 14 26-tone DRUs satisfy the following condition: the relative spacing between the two pilot subcarriers in the DRU is 13 (the relative spacing refers to the absolute value of the difference between the sequence numbers of the two pilot subcarriers in the DRU). For example, the pilot subcarriers of 26-tone DRU 6 are -308 and 70, which are the 8th and 21st subcarriers in 26-tone DRU 6, respectively, with a relative spacing of 13. The relative spacing between the two pilot subcarriers in 26-tone DRUs with discrete bandwidths such as 20MHz and 40MHz is also 13. This design simplifies the implementation of pilot processing. Other 26-tone DRUs satisfy the following condition: the relative spacing between the two pilot subcarriers in the DRU is 11.

[0252] For the receiver, for all DRUs with a relative pilot subcarrier spacing of 13, it is only necessary to store the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and that DRU's relative pilot index. For all DRUs with a relative pilot subcarrier spacing of 11, it is only necessary to store the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and that DRU's relative pilot index. This reduces the implementation complexity and saves storage resources at the receiver.

[0253] 3) There is a hierarchical relationship between the pilot subcarriers of DRUs of different sizes:

[0254] Any 52-tone DRU contains four pilot subcarriers, which are the same as the pilot subcarriers contained in two 26-tone DRUs that have the same subcarriers as that 52-tone DRU. For example, if the pilot subcarriers of 26-tone DRU1 are [-473, -176] and the pilot subcarriers of 26-tone DRU2 are [-242, 136], then the pilot subcarriers of 52-tone DRU1 are [-473, -242, -176, 136].

[0255] Each 106-tone DRU has four pilot subcarriers, and some pilot subcarriers of the two 52-tone DRUs that share the same subcarriers with that 106-tone DRU are identical. Furthermore, of the four pilot subcarriers in any 106-tone DRU, two are identical to the first and third pilot subcarriers of the first of the two 52-tone DRUs, and the other two are identical to the second and fourth pilot subcarriers of the second of the two 52-tone DRUs. It can be understood that the first and second 52-tone DRUs are described in ascending order based on their DRU indices; the first and third pilot subcarriers, and the second and fourth pilot subcarriers, are described in ascending order based on their subcarrier indices. For example, the pilot subcarriers of 52-toneDRU1 are [-473, -242, -176, 136], and the first and third pilot subcarriers are -473 and -176. The pilot subcarriers of 526-toneDRU2 are [-440, -209, -143, 169], and the second and fourth pilot subcarriers are -209 and 169. Then the pilot subcarriers of 106-toneDRU1 are [-473, -209, -176, 169].

[0256] The eight pilot subcarriers of any 242-toneDRU are the same as the pilot subcarriers of the two 106-toneDRUs that have the same subcarriers as that 242-toneDRU. For example, if the pilot subcarriers of 106-toneDRU1 are [-473, -209, -176, 169] and the pilot subcarriers of 106-toneDRU2 are [-374, -275, -77, 103], then the pilot subcarriers of 242-toneDRU1 are [-473, -374, -275, -209, -176, -77, 103, 169].

[0257] The hierarchical relationship between pilot subcarriers of different DRU sizes described above is the same as the hierarchical relationship between pilot subcarriers of different rRU sizes included in an 80MHz bandwidth when the highest 20MHz channel is not used. This simplifies the implementation of pilot processing. Furthermore, this hierarchical relationship ensures that the distribution pattern of pilot subcarriers for all DRUs is consistent with that of all 26-tone-DRUs. Specifically, for pilot subcarriers with positive subcarrier indices in all DRUs, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 11; for pilot subcarriers with negative subcarrier indices in all DRUs, the absolute value of the difference between the subcarrier indices of any two adjacent subcarriers is 11. This avoids the impact of pilot clustering on receiver performance due to increased narrowband interference.

[0258] Accordingly, the DRU assigned to a site can be one of the multiple DRUs shown in Table 4 or Table 5, or the DRU assigned to a site can be one of multiple predefined DRUs, which can be any of the multiple DRUs shown in Table 4 or Table 5.

[0259] It is understood that the pilot designs given in Tables 4 and 5 are based on the tone plan given in Table 3A. For pilot designs of other tone plans such as Tables 3B and 3F, the pilot design ideas of the tone plan shown in Table 3A can be referred to, and will not be elaborated further. For example, when the tone plan shown in Table 3A changes, the distribution of pilot subcarriers also changes accordingly. For example, when the subcarriers of each DRU in the tone plan given in Table 3A are shifted in the frequency domain, the pilot subcarriers they contain also undergo the same shift in the frequency domain. For example, all DRUs in the tone plan shown in Table 3A can be shifted to the right by k as a whole, that is, the subcarrier indexes contained in all DRUs are simultaneously increased by k, and the subcarrier indexes of the pilot subcarriers contained in all DRUs are also simultaneously increased by k, for example, k is 0 or 1, and the shifted pilot subcarriers still satisfy the above characteristics.

[0260] It is understandable that the pilot designs given in Tables 4 and 5 are only one possible design that satisfies the above characteristics. In specific applications, there may be other pilot designs that satisfy the above characteristics.

[0261] In another possible design, for pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10; for pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10.

[0262] As an example, based on the DRU tone plan given in Table 3A, the pilot subcarriers of each DRU can be shown in Table 6.

[0263] Table 6

[0264]

[0265] It can be seen that the pilot designs given in Table 6 satisfy the following characteristics:

[0266] 1) In any 26-tone-DRU containing subcarriers with negative subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers; in any 26-tone-DRU containing subcarriers with positive subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers.

[0267] For example, see Table 7, which is an example of a detailed expansion of the subcarriers of all 26-tone DRUs in Table 6. Each row in Table 7 corresponds to a subcarrier index of a 26-tone DRU, and the pilot subcarrier indexes in each 26-tone DRU are marked in bold.

[0268] Table 7

[0269] -500 -473 -446 -419 -392 -365 -338 -311 -284 -257 -230 -2033 -176 -149 -122 -95 -68 -41 13 40 67 94 121 148 175 202 -499 -472 -445 -418 -391 -364 -337 -310 -283 -256 -229 -202 -175 -148 -121 -94 -67 -40 14 41 68 95 122 149 176 203 -498 -471 -444 -417 -390 -363 -336 -309 -282 -255 -228 -201 -174 -147 -120 -93 -66 -39 15 42 69 96 123 150 177 204 -497 -470 -443 -416 -389 -362 -335 -308 -281 -254 -227 -200 -173 -146 -119 -92 -65 -38 16 43 70 97 124 151 178 205 -496 -469 -442 -415 -388 -361 -334 -307 -280 -253 -226 -199 -172 -145 -118 -91 -64 -37 17 44 71 98 125 152 179 206 -495 -468 -441 -414 -387 -360 -333 -306 -279 -252 -225 -198 -171 -144 -117 -90 -63 -36 18 45 72 99 126 153 180 207 -494 -467 -440 -413 -386 -359 -332 -305 -278 -251 -224 -197 -170 -143 -116 -89 -62 -35 19 46 73 100 127 154 181 208 -493 -466 -439 -412 -385 -358 -331 -304 -277 -250 -223 -196 -169 -142 -115 -88 -61 -34 20 47 74 101 128 155 182 209 -492 -465 -438 -411 -384 -357 -330 -303 -276 -249 -222 -195 -168 -141 -114 -87 -60 -33 21 48 75 102 129 156 183 210 -491 -464 -437 -410 -383 -356 -329 -302 -275 -248 -221 -194 -167 -140 -113 -86 -59 -32 22 49 76 103 130 157 184 211 -490 -463 -436 -409 -382 -355 -328 -301 -274 -247 -220 -193 -166 -139 -112 -85 -58 -31 23 50 77 104 131 158 185 212 -489 -462 -435 -408 -381 -354 -327 -300 -273 -246 -219 -192 -165 -138 -111 -84 -57 -30 24 51 78 105 132 159 186 213 -488 -461 -434 -407 -380 -353 -326 -299 -272 -245 -218 -191 -164 -137 -110 -83 -56 -29 25 52 79 106 133 160 187 214 -487 -460 -433 -406 -379 -352 -325 -298 -271 -244 -217 -190 -163 -136 -109 -82 -55 -28 26 53 80 107 134 161 188 215 -486 -459 -432 -405 -378 -351 -324 -297 -270 -243 -216 -189 -162 -135 -108 -81 -54 -27 27 54 81 108 135 162 189 216 -485 -458 -431 -404 -377 -350 -323 -296 -269 -242 -215 -188 -161 -134 -107 -80 -53 -26 28 55 82 109 136 163 190 217 -484 -457 -430 -403 -376 -349 -322 -295 -268 -241 -214 -187 -160 -133 -106 -79 -52 -25 29 56 83 110 137 164 191 218 -483 -456 -429 -402 -375 -348 -321 -294 -267 -240 -213 -186 -159 -132 -105 -78 -51 -24 30 57 84 111 138 165 192 219 -482 -455 -428 -401 -374 -347 -320 -293 -266 -239 -212 -185 -158 -131 -104 -77 -50 -23 31 58 85 112 139 166 193 220 -481 -454 -427 -400 -373 -346 -319 -292 -265 -238 -211 -184 -157 -130 -103 -76 -49 -22 32 59 86 113 140 167 194 221 -480 -453 -426 -399 -372 -345 -318 -291 -264 -237 -210 -183 -156 -129 -102 -75 -48 -21 33 60 87 114 141 168 195 222 -479 -452 -425 -398 -371 -344 -317 -290 -263 -236 -209 -182 -155 -128 -101 -74 -47 -20 34 61 88 115 142 169 196 223 -478 -451 -424 -397 -370 -343 -316 -289 -262 -235 -208 -181 -154 -127 -100 -73 -46 -19 35 62 89 116 143 170 197 224 -477 -450 -423 -396 -369 -342 -315 -288 -261 -234 -207 -180 -153 -126 -99 -72 -45 -18 36 63 90 117 144 171 198 225 -476 -449 -422 -395 -368 -341 -314 -287 -260 -233 -206 -179 -152 -125 -98 -71 -44 -17 37 64 91 118 145 172 199 226 -475 -448 -421 -394 -367 -340 -313 -286 -259 -232 -205 -178 -151 -124 -97 -70 -43 -16 38 65 92 119 146 173 200 227 -474 -447 -420 -393 -366 -339 -312 -285 -258 -231 -204 -177 -150 -123 -96 -69 -42 -15 39 66 93 120 147 174 201 228

[0270] For example, in Table 7, the first row is 26-tone DRU1. Among the subcarriers with negative subcarrier indices, the first subcarrier is -500 and the last subcarrier is -41. These are data subcarriers and are not used as pilot subcarriers. Among the subcarriers with positive subcarrier indices, the first subcarrier is 13 and the last subcarrier is 202. These are data subcarriers and are not used as pilot subcarriers.

[0271] It is understandable that in the case of multi-stream transmission, the receiver needs to obtain the channel coefficient at the pilot subcarrier through interpolation. Before the first subcarrier and after the last subcarrier in the subcarrier index with a negative number, and before the first subcarrier and after the last subcarrier in the subcarrier index with a positive number, there are no subcarriers carrying valid information (such as no data subcarriers or pilot subcarriers), so interpolation cannot be performed, and therefore the corresponding channel coefficient cannot be obtained. The channel coefficient of the pilot subcarrier cannot be denoised by the channel smoothing algorithm.

[0272] In this embodiment of the application, the first and last subcarriers of any 26-tone-DRU with negative subcarrier indices are not used as pilot subcarriers, and the first and last subcarriers of any 26-tone-DRU with positive subcarrier indices are not used as pilot subcarriers. This ensures that the channel coefficients at each pilot subcarrier can be obtained by interpolation during multi-stream transmission, and that the channel coefficients at the pilot subcarriers can be denoised using a channel smoothing algorithm, thereby improving the channel estimation accuracy of the pilot subcarriers and the phase tracking accuracy.

[0273] 2) Among the pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10 (or in other words, there is a 9-subcarrier interval between any two adjacent pilot subcarriers); among the pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10 (or in other words, there is a 9-subcarrier interval between any two adjacent pilot subcarriers).

[0274] For example, in Table 7, -473 and -463 are adjacent, and the absolute value of their difference is 10; 48 and 58 are adjacent, and the absolute value of their difference is 10, and so on.

[0275] Furthermore, after deducting subcarriers in each 26-tone-DRU (or each DRU) that cannot be interpolated, there is a 9-subcarrier interval between any two adjacent pilot subcarriers. For example, in Table 7, after deducting from the 18th column (i.e., "-41, -40, ..., -15") and the 19th column (i.e., "13, 14, ..., 39") from left to right, all pilot subcarriers satisfy the condition that there is a 9-subcarrier interval between any two adjacent pilot subcarriers. For example, there is a 9-subcarrier interval between pilot subcarrier -53 and pilot subcarrier -43, i.e., "-52, -51, -50, -49, -48, -47, -46, -45, -44", and a 9-subcarrier interval between pilot subcarrier -43 and pilot subcarrier 48, i.e., "-42, 40, 41, 42, 43, 44, 45, 46, 47".

[0276] As can be seen from Table 7, the pilot subcarriers of all 26-tone-DRUs are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference on the performance of the receiver.

[0277] Furthermore, any 26-tone DRU satisfies the following: the relative spacing between the two pilot subcarriers in the DRU is 12 or 10 (relative spacing refers to the absolute value of the difference between the indexes of the two pilot subcarriers in the DRU). For the receiver, for all DRUs with a relative spacing of 12, only the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and the relative pilot index of that DRU need to be stored; for all DRUs with a relative spacing of 10, only the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and the relative pilot index of that DRU need to be stored. This reduces implementation complexity and saves storage resources at the receiver.

[0278] 3) There is a hierarchical relationship between the pilot subcarriers of DRUs of different sizes:

[0279] The four pilot subcarriers contained in any 52-tone DRU are the same as the pilot subcarriers contained in the two 26-tone DRUs that have the same subcarriers as any 52-tone DRU.

[0280] Each 106-tone DRU has four pilot subcarriers, and some pilot subcarriers of the two 52-tone DRUs that share the same subcarriers with that 106-tone DRU are identical. Furthermore, of the four pilot subcarriers in any 106-tone DRU, two are identical to the first and third pilot subcarriers of the first of the two 52-tone DRUs, and the other two are identical to the second and fourth pilot subcarriers of the second of the two 52-tone DRUs. It can be understood that the first and second 52-tone DRUs are described in ascending order based on their DRU indices; the first and third pilot subcarriers, and the second and fourth pilot subcarriers, are described in ascending order based on their subcarrier indices.

[0281] The eight pilot subcarriers of any 242-toneDRU are the same as the pilot subcarriers of the two 106-toneDRUs that have the same subcarriers as any 242-toneDRU.

[0282] The hierarchical relationship between the pilot subcarriers of DRUs of different sizes is the same as the hierarchical relationship between the pilot subcarriers of rRUs of different sizes included in an 80MHz bandwidth when the highest 20MHz channel is not used. This simplifies the implementation of pilot processing. Furthermore, this hierarchical relationship ensures that the distribution pattern of pilot subcarriers for all DRUs is consistent with the distribution pattern of pilot subcarriers for all 26-tone-DRUs, thereby avoiding pilot clustering and the increased impact of narrowband interference at the receiver on performance.

[0283] Accordingly, the DRU assigned to a site can be one of the multiple DRUs shown in Table 6 or Table 7, or the DRU assigned to a site can be one of multiple predefined DRUs, which can be any of the multiple DRUs shown in Table 6 or Table 7.

[0284] It is understood that the pilot designs given in Tables 6 and 7 are based on the tone plan given in Table 3A. For pilot designs of other tone plans such as Tables 3B and 3F, the pilot design ideas of the tone plan shown in Table 3A can be referred to, and will not be elaborated further. For example, when the tone plan changes, the distribution of pilot subcarriers also changes accordingly. For example, when the subcarriers of each DRU in the tone plan given in Table 3A are shifted in the frequency domain, the pilot subcarriers they contain also undergo the same shift in the frequency domain. For example, all DRUs in the tone plan shown in Table 3A can be shifted to the right by k as a whole, that is, the subcarrier indexes contained in all DRUs are simultaneously incremented by k. Then, the subcarrier indexes of the pilot subcarriers contained in all DRUs are also simultaneously incremented by k, for example, k is 0 or 1. The shifted pilot subcarriers still satisfy the above characteristics.

[0285] It is understandable that the pilot designs given in Tables 6 and 7 are only one possible pilot design that meets the above characteristics. In specific applications, there may be other pilot designs that meet the above characteristics.

[0286] It is understood that the DRU tone plan with a discrete bandwidth of 60MHz applicable to the embodiments of this application is not limited to the tone plan shown in Table 3A and its related variations (e.g., Tables 3B to 3F).

[0287] Tables 8A to 8C represent another DRU tone plan with a discrete bandwidth of 60MHz applicable to the embodiments of this application. Table 8A lists the DRUs associated with 242-tone DRU1, Table 8B lists the DRUs associated with 242-tone DRU2, and Table 8C lists the DRUs associated with 242-tone DRU3. Taking the DRU tone plan in Table 8A as the base DRU tone plan (i.e., [DRU_base 60]), the DRUs associated with 242-tone DRU2 can be obtained by shifting the DRUs associated with 242-tone DRU1 (i.e., [DRU_base 60]) to the right by 2 subcarriers, and the DRUs associated with 242-tone DRU3 can be obtained by shifting the DRUs associated with 242-tone DRU1 (i.e., [DRU_base 60]) to the right by 1 subcarrier.

[0288] Table 8A

[0289]

[0290] Table 8B

[0291]

[0292] Table 8C

[0293]

[0294] For the DRU tone plan shown in Tables 8A to 8C, the pilot design can be as shown in Table 9.

[0295] Table 9

[0296]

[0297] It can be seen that the pilot designs given in Table 9 satisfy the following characteristics:

[0298] 1) The frequencies of the subcarriers contained in all 26-tone-DRUs constitute multiple consecutive frequency ranges. For example, the frequencies of the subcarriers contained in all 26-tone-DRUs in Table 9 can be divided into three consecutive frequency ranges: the range of subcarrier indices from -489 to -139, the range of subcarrier indices from -120 to -10, and the range of subcarrier indices from 14 to 226 (the above is only one possible division example, and there may be other division methods in practice).

[0299] In any 26-tone-DRU containing subcarriers located within any of the aforementioned consecutive frequency ranges, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers; in any 26-tone-DRU among multiple DRUs, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers.

[0300] See Table 10 for an example of a detailed expansion of the subcarriers of all 26-tone DRUs in Table 9. Each row in Table 10 corresponds to a subcarrier index of a 26-tone DRU, and the pilot subcarrier indexes in each 26-tone DRU are marked in bold.

[0301] Table 10

[0302] -489 -462 -435 -408 -381 -354 -327 -300 -273 -246 -219 -192 -165 -120 -93 -66 -39 -12 38 65 92 119 146 173 200 227 -488 -461 -434 -407 -380 -353 -326 -299 -272 -245 -218 -191 -164 -119 -92 -65 -38 -11 39 66 93 120 147 174 201 228 -487 -460 -433 -406 -379 -352 -325 -298 -271 -244 -217 -190 -163 -118 -91 -64 -37 -10 40 67 94 121 148 175 202 229 -486 -459 -432 -405 -378 -351 -324 -297 -270 -243 -216 -189 -162 -117 -90 -63 -36 14 41 68 95 122 149 176 203 230 -485 -458 -431 -404 -377 -350 -323 -296 -269 -242 -215 -188 -161 -116 -89 -62 -35 15 42 69 96 123 150 177 204 231 -484 -457 -430 -403 -376 -349 -322 -295 -268 -241 -214 -187 -160 -115 -88 -61 -34 16 43 70 97 124 151 178 205 232 -483 -456 -429 -402 -375 -348 -321 -294 -267 -240 -213 -186 -159 -114 -87 -60 -33 17 44 71 98 125 152 179 206 233 -482 -455 -428 -401 -374 -347 -320 -293 -266 -239 -212 -185 -158 -113 -86 -59 -32 18 45 72 99 126 153 180 207 234 -481 -454 -427 -400 -373 -346 -319 -292 -265 -238 -211 -184 -157 -112 -85 -58 -31 19 46 73 100 127 154 181 208 235 -480 -453 -426 -399 -372 -345 -318 -291 -264 -237 -210 -183 -156 -111 -84 -57 -30 20 47 74 101 128 155 182 209 236 -479 --452 -425 -398 -371 -344 -317 -290 -263 -236 -209 -182 -155 -110 -83 -56 -29 21 48 75 102 129 156 183 210 237 -478 -451 -424 -397 -370 -343 -316 -289 -262 -235 -208 -181 -154 -109 -82 -55 -28 22 49 76 103 130 157 184 211 238 -477 -450 -423 -396 -369 -342 -315 -288 -261 -234 -207 -180 -153 -108 -81 -54 -27 23 50 77 104 131 158 185 212 239 -476 -449 -422 -395 -368 -341 -314 -287 -260 -233 -206 -179 -152 -107 -80 -53 -26 24 51 78 105 132 159 186 213 240 -475 -448 -421 -394 -367 -340 -313 -286 -259 --232 -205 -178 -151 -106 -79 -52 -25 25 52 79 106 133 160 187 214 241 -474 -447 -420 -393 -366 -339 -312 -285 -258 -231 -204 -177 -150 -105 -78 -51 -24 26 53 80 107 134 161 188 215 242 -473 -446 -419 -392 -365 -338 -311 -284 -257 -230 -203 -176 -149 -104 -77 -50 -23 27 54 81 108 135 162 189 216 243 -472 -445 -418 -391 -364 -337 -310 -283 -256 -229 -202 -175 -148 -103 -76 -49 -22 28 55 82 109 136 163 190 217 244 -471 -444 -417 -390 -363 -336 -309 -282 -255 -228 -201 -174 -147 -102 -75 -48 -21 29 56 83 110 137 164 191 218 245 -470 -443 -416 -389 -362 -335 -308 -281 -254 -227 -200 -173 -146 -101 -74 -47 -20 30 57 84 111 138 165 192 219 246 -469 -442 -415 -388 -361 -334 -307 -280 -253 -226 -199 -172 -145 -100 -73 -46 -19 31 58 85 112 139 166 193 220 247 -468 -441 -414 -387 -360 -333 -306 -279 -252 -225 -198 -171 -144 -126 -99 -72 -45 -18 32 59 86 113 140 167 194 221 -467 -440 -413 -386 -359 -332 -305 -278 -251 -224 -197 -170 -143 -125 -98 -71 -44 -17 33 60 87 114 141 168 195 222 -466 -439 -412 -385 -358 -331 -304 -277 -250 -223 -196 -169 -142 -124 -97 -70 -43 -16 34 61 88 115 142 169 196 223 -465 -438 -411 -384 -357 -330 -303 -276 -249 -2222 -195 -168 -141 -123 -96 -69 -42 -15 35 62 89 116 143 170 197 224 -464 -437 -410 -383 -356 -329 -302 -275 -248 -221 -194 -167 -140 -122 -95 -68 -41 -14 36 63 90 117 144 171 198 225 -463 -436 -409 -382 -355 -328 -301 -274 -247 -220 -193 -166 -139 -121 -94 -67 -40 -13 37 64 91 118 145 172 199 226

[0303] For example, in Table 10, the first row is 26-tone DRU1. Among the subcarriers with negative subcarrier indices, the first subcarrier is -489 and the last subcarrier is -12. These are data subcarriers and are not used as pilot subcarriers. Among the subcarriers with positive subcarrier indices, the first subcarrier is 38 and the last subcarrier is 227. These are data subcarriers and are not used as pilot subcarriers.

[0304] It is understandable that in the case of multi-stream transmission, the receiver needs to obtain the channel coefficient at the pilot subcarrier by interpolation. Before the first subcarrier and after the last subcarrier in any of the above consecutive frequency ranges, and before the first subcarrier and after the last subcarrier in any 26-tone-DRU, there are no subcarriers carrying valid information (such as no data subcarriers or pilot subcarriers), so interpolation cannot be performed, and therefore the corresponding channel coefficient cannot be obtained. The channel coefficient of the pilot subcarrier cannot be denoised by the channel smoothing algorithm.

[0305] In this embodiment of the application, the first and last subcarriers in any consecutive frequency range are not used as pilot subcarriers, and the first and last subcarriers of any 26-tone-DRU are not used as pilot subcarriers. This ensures that the channel coefficients at each pilot subcarrier can be obtained by interpolation during multi-stream transmission, and that the channel coefficients at the pilot subcarriers can be denoised by a channel smoothing algorithm, thereby improving the channel estimation accuracy of the pilot subcarriers and the phase tracking accuracy.

[0306] 2) In all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers in any of the above consecutive frequency ranges is 10 (or in other words, there is a 9-subcarrier interval between any two adjacent pilot subcarriers).

[0307] For example, in Table 10, -452 and -442 are adjacent, and the absolute value of their difference is 10; 127 and 137 are adjacent, and the absolute value of their difference is 10, and so on.

[0308] As can be seen from Table 10, the pilot subcarriers of all 26-tone-DRUs are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference on the performance of the receiver.

[0309] Furthermore, for all 26-tone DRUs with the same relative pilot subcarrier spacing (relative spacing refers to the absolute value of the difference between the sequence numbers of two pilot subcarriers in the DRU), and for all 26-tone DRUs with a relative pilot subcarrier spacing of 10, the receiver only needs to store the relative pilot index of one of the DRUs, and the offset values ​​between the relative pilot indices of the other DRUs and the relative pilot index of the first DRU. This reduces implementation complexity and saves storage resources at the receiver.

[0310] 3) There is a hierarchical relationship between the pilot subcarriers of DRUs of different sizes:

[0311] The four pilot subcarriers contained in any 52-tone DRU are the same as the pilot subcarriers contained in the two 26-tone DRUs that have the same subcarriers as any 52-tone DRU.

[0312] Each 106-tone DRU has four pilot subcarriers, and some pilot subcarriers of the two 52-tone DRUs that share the same subcarriers with that 106-tone DRU are identical. Furthermore, of the four pilot subcarriers in any 106-tone DRU, two pilot subcarriers are identical to the first and third pilot subcarriers of the first 52-tone DRU, and the other two pilot subcarriers are identical to the second and fourth pilot subcarriers of the second 52-tone DRU. It can be understood that the first and second 52-tone DRUs are described in ascending order of DRU index; the first and third pilot subcarriers, and the second and fourth pilot subcarriers, are described in ascending order of subcarrier index.

[0313] The eight pilot subcarriers of any 242-toneDRU are the same as the pilot subcarriers of the two 106-toneDRUs that have the same subcarriers as any 242-toneDRU.

[0314] The hierarchical relationship between the pilot subcarriers of DRUs of different sizes is the same as the hierarchical relationship between the pilot subcarriers of rRUs of different sizes included in an 80MHz bandwidth when the highest 20MHz channel is not used. This simplifies the implementation of pilot processing. Furthermore, this hierarchical relationship ensures that the distribution pattern of pilot subcarriers for all DRUs is consistent with the distribution pattern of pilot subcarriers for all 26-tone-DRUs, thereby avoiding pilot clustering and the increased impact of narrowband interference at the receiver on performance.

[0315] Accordingly, the DRU assigned to a site can be one of the multiple DRUs shown in Table 9 or Table 10, or the DRU assigned to a site can be one of multiple predefined DRUs, which can be any of the multiple DRUs shown in Table 9 or Table 10.

[0316] It is understandable that the pilot designs given in Tables 9 and 10 are only one possible design that satisfies the above characteristics. In specific applications, there may be other pilot designs that satisfy the above characteristics.

[0317] Tables 11A and 11B show another DRU tone plan with a discrete bandwidth of 60MHz applicable to the embodiments of this application. Table 11A shows the DRUs associated with 242-tone DRU1. As shown in Table 11B, the DRU associated with 242-tone DRU2 can be obtained by shifting the DRU associated with 242-tone DRU1 to the right by 2 subcarriers, and the DRU associated with 242-tone DRU3 can be obtained by shifting the DRU associated with 242-tone DRU1 to the right by 1 subcarrier.

[0318] Table 11A

[0319]

[0320] Table 11B

[0321]

[0322] For the DRU tone plan shown in Tables 11A and 11B, the pilot design can be as shown in Table 12.

[0323] Table 12

[0324]

[0325] It can be seen that the pilot designs given in Table 12 meet the following characteristics:

[0326] 1) In any 26-tone-DRU containing subcarriers with negative subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers; in any 26-tone-DRU containing subcarriers with positive subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers.

[0327] For example, see Table 13, which is an example of a detailed expansion of the subcarriers of all 26-tone DRUs in Table 12. Each row in Table 13 corresponds to a subcarrier index of a 26-tone DRU, and the pilot subcarrier indexes in each 26-tone DRU are marked in bold.

[0328] Table 13

[0329] -487 -460 -433 -406 -379 -352 -325 -298 -271 -244 -217 -190 -163 -136 -109 -82 -55 -28 26 53 80 107 134 161 188 215 -486 -459 -432 -405 -378 -351 -324 -297 -270 -243 -216 -189 -162 -135 -108 -81 -54 -27 27 54 81 108 135 162 189 216 -485 -458 -431 -404 -377 -350 -323 -296 -269 -242 -215 -188 -161 -134 -107 -80 -53 -26 28 55 82 109 136 163 190 217 -484 -457 -430 -403 -376 -349 -322 -295 -268 -241 -214 -187 -160 -133 -106 -79 -52 -25 29 56 83 110 137 164 191 218 -483 -456 -429 -402 -375 -348 -321 -294 -267 -240 -213 -186 -159 -132 -105 -78 -51 -24 30 57 84 111 138 165 192 219 -482 -455 -428 -401 -374 -347 -320 -293 -266 -239 -212 -185 -158 -131 -104 -77 -50 -23 31 58 85 112 139 166 193 220 -481 -454 -427 -400 -373 -346 -319 -292 -265 -238 -211 -184 -157 -130 -103 -76 -49 -22 32 59 86 113 140 167 194 221 -480 -453 -426 -399 -372 -345 -318 -291 -264 -237 -210 -183 -156 -129 -102 -75 -48 -21 33 60 87 114 141 168 195 222 -479 -452 -425 -398 -371 -344 -317 -290 -263 -236 -209 -182 -155 -128 -101 -74 -47 -20 34 61 88 115 142 169 196 223 -478 -451 -424 -397 -370 -343 -316 -289 -262 -235 -208 -181 -154 -127 -100 -73 -46 -19 35 62 89 116 143 170 197 224 -477 -450 -423 -396 -369 -342 -315 -288 -261 -234 -207 -180 -153 -126 -99 -72 -45 -18 36 63 90 117 144 171 198 225 -476 -449 -422 -395 -368 -341 -314 -287 -260 -233 -206 -179 -152 -125 -98 -71 -44 -17 37 64 91 118 145 172 199 226 -475 -448 -421 -394 -367 -340 -313 -286 -259 -232 -205 -178 -151 -124 -97 -70 -43 -16 38 65 92 119 146 173 200 227 -474 -447 -420 -393 -366 -339 -312 -285 -258 -231 -204 -177 -150 -123 -96 -69 -42 -15 39 66 93 120 147 174 201 228 -473 -446 -419 -392 -365 -338 -311 -284 -257 -230 -203 -176 -149 -122 -95 -68 -41 -14 40 67 94 121 148 175 202 229 -472 -445 -418 -391 -364 -337 -310 -283 -256 -229 -202 -175 -148 -121 -94 -67 -40 -13 41 68 95 122 149 176 203 230 -471 -444 -417 -390 -363 -336 -309 -282 -255 -228 -201 -174 -147 -120 -93 -66 -39 -12 42 69 96 123 150 177 Add 4 231 -470 -443 -416 -389 -362 -335 -308 -281 -254 -227 -200 -173 -146 -119 -92 -65 -38 -11 43 70 97 124 151 178 205 232 -469 -442 -415 -388 -361 -334 -307 -280 -253 -226 -199 -172 -145 -118 -91 -64 -37 17 44 71 98 125 152 179 206 233 -468 -441 -414 -387 -360 -333 -306 -279 -252 -225 -198 -171 -144 -117 -90 -63 -36 18 45 72 99 126 153 180 207 234 -467 -440 -413 -386 -359 -332 -305 -278 -251 -224 -197 -170 -143 -116 -89 -62 -35 19 46 73 100 127 154 181 208 235 -466 -439 -412 -385 -358 -331 -304 -277 -250 -223 -196 -169 -142 -115 -88 -61 -34 20 47 74 101 128 155 182 209 236 -465 -438 -411 -384 -357 -330 -303 -276 -249 -222 195 -168 -141 -114 -87 -60 -33 21 48 75 102 129 156 183 210 237 -464 -437 -410 -383 -356 -329 -302 -275 -248 -221 -194 -167 -140 -113 -86 -59 -32 22 49 76 103 130 157 184 211 238 -463 -436 -409 -382 -355 -328 -301 -274 -247 -220 -193 -166 -139 -112 -85 -58 -31 23 50 77 104 131 158 185 212 239 -462 -435 -408 -381 -354 -327 -300 -273 -246 -219 -192 -165 -138 -111 -84 -57 -30 24 51 78 105 132 159 186 213 240 -461 -434 -407 -380 -353 -326 -299 -272 -245 -218 -191 -164 -137 -110 -83 -56 -29 25 52 79 106 133 160 187 214 241

[0330] For example, in Table 13, the first row is 26-tone DRU1. The first subcarrier with a negative subcarrier index is -487 and the last subcarrier is -28. These are data subcarriers and are not used as pilot subcarriers. The first subcarrier with a positive subcarrier index is 26 and the last subcarrier is 215. These are data subcarriers and are not used as pilot subcarriers.

[0331] It is understandable that in the case of multi-stream transmission, the receiver needs to obtain the channel coefficient at the pilot subcarrier through interpolation. Before the first subcarrier and after the last subcarrier in the subcarrier index with a negative number, and before the first subcarrier and after the last subcarrier in the subcarrier index with a positive number, there are no subcarriers carrying valid information (such as no data subcarriers or pilot subcarriers), so interpolation cannot be performed, and therefore the corresponding channel coefficient cannot be obtained. The channel coefficient of the pilot subcarrier cannot be denoised by the channel smoothing algorithm.

[0332] In this embodiment of the application, the first and last subcarriers of any 26-tone-DRU with negative subcarrier indices are not used as pilot subcarriers, and the first and last subcarriers of any 26-tone-DRU with positive subcarrier indices are not used as pilot subcarriers. This ensures that the channel coefficients at each pilot subcarrier can be obtained by interpolation during multi-stream transmission, and that the channel coefficients at the pilot subcarriers can be denoised using a channel smoothing algorithm, thereby improving the channel estimation accuracy of the pilot subcarriers and the phase tracking accuracy.

[0333] 2) Among the pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers); among the pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 11 (or in other words, there is a 10-subcarrier interval between any two adjacent pilot subcarriers).

[0334] For example, in Table 13, -460 and -449 are adjacent, and the absolute value of their difference is 11; 94 and 105 are adjacent, and the absolute value of their difference is 11, and so on.

[0335] Furthermore, in Table 13, after deducting the subcarriers in each 26-tone-DRU (or each DRU) that cannot be interpolated, any two adjacent pilot subcarriers are spaced 10 subcarriers apart. For example, after deducting "-37, -36, ..., -29" in column 17 and "-28, -27, ..., 25" in column 18 and "26, 27, ..., 43" in column 19 from left to right, all pilot subcarriers satisfy the condition that any two adjacent pilot subcarriers are spaced 10 subcarriers apart. For example, pilot subcarrier -53 and pilot subcarrier -42 are spaced 10 subcarriers apart, and pilot subcarrier -42 and pilot subcarrier 50 are also spaced 10 subcarriers apart.

[0336] As can be seen from Table 13, the pilot subcarriers of all 26-tone-DRUs are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference on the performance of the receiver.

[0337] This avoids the impact of pilot clustering on the performance of the receiver due to increased narrowband interference.

[0338] 3) There is a hierarchical relationship between the pilot subcarriers of DRUs of different sizes:

[0339] The four pilot subcarriers contained in any 52-tone DRU are the same as the pilot subcarriers contained in the two 26-tone DRUs that have the same subcarriers as any 52-tone DRU.

[0340] Each 106-tone DRU has four pilot subcarriers, and some pilot subcarriers of the two 52-tone DRUs that share the same subcarriers with that 106-tone DRU are identical. Furthermore, of the four pilot subcarriers in any 106-tone DRU, two pilot subcarriers are identical to the first and third pilot subcarriers of the first 52-tone DRU, and the other two pilot subcarriers are identical to the second and fourth pilot subcarriers of the second 52-tone DRU. It can be understood that the first and second 52-tone DRUs are described in ascending order of DRU index; the first and third pilot subcarriers, and the second and fourth pilot subcarriers, are described in ascending order of subcarrier index.

[0341] The eight pilot subcarriers of any 242-toneDRU are the same as the pilot subcarriers of the two 106-toneDRUs that have the same subcarriers as any 242-toneDRU.

[0342] The hierarchical relationship between the pilot subcarriers of DRUs of different sizes is the same as the hierarchical relationship between the pilot subcarriers of rRUs of different sizes included in an 80MHz bandwidth when the highest 20MHz channel is not used. This simplifies the implementation of pilot processing. Furthermore, this hierarchical relationship ensures that the distribution pattern of pilot subcarriers for all DRUs is consistent with the distribution pattern of pilot subcarriers for all 26-tone-DRUs, thereby avoiding pilot clustering and the increased impact of narrowband interference at the receiver on performance.

[0343] Furthermore, for 26-tone DRUs, 15 26-tone DRUs satisfy the condition that the relative spacing between the two pilot subcarriers in the DRU is 13 (the relative spacing is the absolute value of the difference between the indexes of the pilot subcarriers in the DRU). The relative spacing between the two pilot subcarriers in 20MHz and 40MHz discrete bandwidth 26-tone DRUs is also 13, a design that simplifies the implementation of pilot processing.

[0344] Other 26-tone DRUs satisfy the following condition: the relative spacing between the two pilot subcarriers in the DRU is 11.

[0345] For the receiver, for all DRUs with a relative pilot subcarrier spacing of 13, it is only necessary to store the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and that DRU's relative pilot index. For all DRUs with a relative pilot subcarrier spacing of 11, it is only necessary to store the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and that DRU's relative pilot index. This reduces the implementation complexity and saves storage resources at the receiver.

[0346] Accordingly, the DRU assigned to a site can be one of the multiple DRUs shown in Table 12 or Table 13, or the DRU assigned to a site can belong to multiple predefined DRUs, as shown in Table 12 or Table 13.

[0347] It is understandable that the pilot designs given in Tables 12 and 13 are only one possible pilot implementation of the tone plans shown in Tables 11A and 11C. Other variations are possible in practical applications. For example, if all DRU pilot subcarriers in the tone plans shown in Tables 11A to 11C are shifted to the right by k, then all DRU pilot subcarriers shown in Tables 12 and 13 are also shifted to the right by k. That is, the subcarrier index of all pilot subcarriers contained in all DRUs is simultaneously increased by k, where k is, for example, 0, 1, 2, 3, or 4. The shifted pilot subcarriers still satisfy the above characteristics.

[0348] It is understandable that the pilot design given in Table 12 is only one possible design that satisfies the above characteristics. In specific applications, there may be other pilot designs that satisfy the above characteristics.

[0349] For the DRU tone plan shown in Tables 11A to 11B, the pilot design can also be shown in Table 14.

[0350] Table 14

[0351]

[0352] It can be seen that the pilot designs given in Table 14 meet the following characteristics:

[0353] 1) In any 26-tone-DRU containing subcarriers with negative subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers; in any 26-tone-DRU containing subcarriers with positive subcarrier indices, the first and last subcarriers are data subcarriers, or in other words, not pilot subcarriers.

[0354] See Table 15 for an example of a detailed expansion of the subcarriers of all 26-tone DRUs in Table 14. Each row in Table 15 corresponds to a subcarrier index of a 26-tone DRU, and the pilot subcarrier indices in each 26-tone DRU are identified in bold.

[0355] Table 15

[0356] -487 -460 -433 -406 -379 -352 -325 -298 -271 -244 -217 -190 -163 -136 -109 -82 -55 -28 26 53 80 107 134 161 188 215 -486 -459 -432 -405 -378 -351 -324 -297 -270 -243 -216 -189 -162 -135 -108 -81 -54 -27 27 54 81 108 135 162 189 216 -485 -458 -431 -404 -377 -350 -323 -296 -269 -242 -215 -188 -161 -134 -107 -80 -53 -26 28 55 82 109 136 163 190 217 -484 -457 -430 -403 -376 -349 -322 -295 -268 -241 -214 -187 -160 -133 -106 -79 -52 -25 29 56 83 110 137 164 191 218 -483 -456 -429 -402 -375 -348 -321 -294 -267 -240 -213 -186 -159 -132 -105 -78 -51 -24 30 57 84 111 138 165 192 219 -482 -455 -428 -401 -374 -347 -320 -293 -266 -239 -212 -185 -158 -131 -104 -77 -50 -23 31 58 85 112 139 166 193 220 -481 -454 -427 -400 -373 -346 -319 -292 -265 -238 -211 -184 -157 -130 -103 -76 -49 -22 32 59 86 113 140 167 194 221 -480 -453 -426 -399 -372 -345 -318 -291 -264 -237 -210 -183 -156 -129 -102 -75 -48 -21 33 60 87 114 141 168 195 222 -479 -452 -425 -398 -371 -344 -317 -290 -263 -236 -209 -182 -155 -128 -101 -74 -47 -20 34 61 88 115 142 169 196 223 -478 -451 -424 -397 -370 -343 -316 -289 -262 -235 -208 -181 -154 -127 -100 -73 -46 -19 35 62 89 116 143 170 197 224 -477 -450 -423 -396 -369 -342 -315 -288 -261 -234 -207 -180 -153 -126 -99 -72 -45 -18 36 63 90 117 144 171 198 225 -476 -449 -422 -395 -368 -341 -314 -287 -260 -233 -206 -179 -152 -125 -98 -71 -44 -17 37 64 91 118 145 172 199 226 -475 -448 -421 -394 -367 -340 -313 -286 -259 -232 -205 -178 -151 -124 -97 -70 -43 -16 38 65 92 119 146 173 200 227 -474 -447 ---420 -393 -366 -339 -312 -285 -258 -231 -204 -177 -150 -123 -96 -69 -42 -15 39 66 93 120 147 174 201 228 -473 -446 -419 -392 -365 -338 -311 -284 -257 -230 -203 -176 -149 -122 -95 -68 -41 -14 40 67 94 121 148 175 202 229 -472 -445 -418 -391 -364 -337 -3310 -283 -256 -229 -202 -175 -148 -121 -94 -67 -40 -13 41 68 95 122 149 176 203 230 -471 -444 -417 -390 -363 -336 -309 -282 -255 -228 -201 -174 -147 -120 -93 -66 -39 -12 42 69 96 123 150 177 204 231 -470 -443 -416 -389 -362 -335 -308 -281 -254 -227 -200 -173 -146 -119 -92 -65 -38 -11 43 70 97 124 151 178 205 232 -469 -442 -415 -388 -361 -334 -307 -280 -253 -226 -199 -172 -145 -118 -91 -64 -37 17 44 71 98 125 152 179 206 233 -468 -441 -414 -387 -360 -333 -306 -279 -252 -225 -198 -171 -144 -117 -90 -63 -36 18 45 72 99 126 153 180 207 234 -467 -440 -413 -386 -359 -332 -305 -278 -251 -224 -197 -170 -143 -116 -89 -62 -35 19 46 73 100 127 154 181 208 235 -466 -439 -412 -385 -358 -331 -304 -277 -250 -223 -196 -169 -142 -115 -88 -61 -34 20 47 74 101 128 155 182 209 236 -465 -438 -411 -384 -357 -330 -303 -276 -249 -222 -195 -168 -141 -114 -87 -60 -33 21 48 75 102 129 156 183 210 237 -464 -437 -410 -383 -356 -329 -302 -275 -248 -221 -194 -167 -140 -113 -86 -59 -32 22 49 76 103 130 157 184 211 238 -463 -436 -409 -382 -355 -328 -301 -274 -247 -220 -193 -166 -139 -112 -85 -58 -31 23 50 77 104 131 158 185 212 239 -462 -435 -408 -381 -354 -327 -300 -273 -246 -219 -192 -165 -138 -111 -84 -57 -30 24 51 78 105 132 159 186 213 240 -461 -434 -407 -380 -353 -326 -299 -272 -245 -218 -191 -164 -137 -110 -83 -56 -29 25 52 79 106 133 160 187 214 241

[0357] For example, in Table 15, the first row is 26-tone DRU1. The first subcarrier with a negative subcarrier index is -487 and the last subcarrier is -28. These are data subcarriers and are not used as pilot subcarriers. The first subcarrier with a positive subcarrier index is 26 and the last subcarrier is 215. These are data subcarriers and are not used as pilot subcarriers.

[0358] It is understandable that in the case of multi-stream transmission, the receiver needs to obtain the channel coefficient at the pilot subcarrier through interpolation. Before the first subcarrier and after the last subcarrier in the subcarrier index with a negative number, and before the first subcarrier and after the last subcarrier in the subcarrier index with a positive number, there are no subcarriers carrying valid information (such as no data subcarriers or pilot subcarriers), so interpolation cannot be performed, and therefore the corresponding channel coefficient cannot be obtained. The channel coefficient of the pilot subcarrier cannot be denoised by the channel smoothing algorithm.

[0359] In this embodiment of the application, the first and last subcarriers of any 26-tone-DRU with negative subcarrier indices are not used as pilot subcarriers, and the first and last subcarriers of any 26-tone-DRU with positive subcarrier indices are not used as pilot subcarriers. This ensures that the channel coefficients at each pilot subcarrier can be obtained by interpolation during multi-stream transmission, and that the channel coefficients at the pilot subcarriers can be denoised using a channel smoothing algorithm, thereby improving the channel estimation accuracy of the pilot subcarriers and the phase tracking accuracy.

[0360] 2) Among the pilot subcarriers with positive subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10 (or in other words, there is a 9-subcarrier interval between any two adjacent pilot subcarriers); among the pilot subcarriers with negative subcarrier indices in all 26-tone-DRUs (or all DRUs), the absolute value of the difference between the subcarrier indices of any two adjacent pilot subcarriers is 10 (or in other words, there is a 9-subcarrier interval between any two adjacent pilot subcarriers).

[0361] For example, in Table 15, -450 and -440 are adjacent, and the absolute value of their difference is 10; 141 and 151 are adjacent, and the absolute value of their difference is 10, and so on.

[0362] Furthermore, in Table 15, after deducting the subcarriers in each 26-tone-DRU (or each DRU) that cannot be interpolated, there is a 9-subcarrier interval between any two adjacent pilot subcarriers. For example, after deducting "-37, -36, ..., -29" in column 17 and "-28, -27, ..., 25" in column 18 and "26, 27, ..., 43" in column 19 from left to right, all pilot subcarriers satisfy the condition that there is a 9-subcarrier interval between any two adjacent pilot subcarriers. For example, there is a 9-subcarrier interval between pilot subcarrier -50 and pilot subcarrier -40, and there is also a 9-subcarrier interval between pilot subcarrier -40 and pilot subcarrier 51.

[0363] As can be seen from Table 15, the pilot subcarriers of all 26-tone-DRUs are relatively evenly distributed in the frequency domain, which can avoid pilot clustering and increase the impact of narrowband interference at the receiver on performance.

[0364] This avoids the impact of pilot clustering on the performance of the receiver due to increased narrowband interference.

[0365] Furthermore, any 26-tone DRU satisfies the following: the relative spacing between the two pilot subcarriers in the DRU is 12 or 10 (relative spacing refers to the absolute value of the difference between the indexes of the two pilot subcarriers in the DRU). For the receiver, for all DRUs with a relative spacing of 12, only the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and the relative pilot index of that DRU need to be stored; for all DRUs with a relative spacing of 10, only the relative pilot index of one DRU and the offset values ​​between the relative pilot indices of the other DRUs and the relative pilot index of that DRU need to be stored. This reduces implementation complexity and saves storage resources at the receiver.

[0366] 3) There is a hierarchical relationship between the pilot subcarriers of DRUs of different sizes:

[0367] The four pilot subcarriers contained in any 52-tone DRU are the same as the pilot subcarriers contained in the two 26-tone DRUs that have the same subcarriers as any 52-tone DRU.

[0368] Each 106-tone DRU has four pilot subcarriers, and some pilot subcarriers of the two 52-tone DRUs that share the same subcarriers with that 106-tone DRU are identical. Furthermore, of the four pilot subcarriers in any 106-tone DRU, two pilot subcarriers are identical to the first and third pilot subcarriers of the first 52-tone DRU, and the other two pilot subcarriers are identical to the second and fourth pilot subcarriers of the second 52-tone DRU. It can be understood that the first and second 52-tone DRUs are described in ascending order of DRU index; the first and third pilot subcarriers, and the second and fourth pilot subcarriers, are described in ascending order of subcarrier index.

[0369] The eight pilot subcarriers of any 242-toneDRU are the same as the pilot subcarriers of the two 106-toneDRUs that have the same subcarriers as any 242-toneDRU.

[0370] The hierarchical relationship between the pilot subcarriers of DRUs of different sizes is the same as the hierarchical relationship between the pilot subcarriers of rRUs of different sizes included in an 80MHz bandwidth when the highest 20MHz channel is not used. This simplifies the implementation of pilot processing. Furthermore, this hierarchical relationship ensures that the distribution pattern of pilot subcarriers for all DRUs is consistent with the distribution pattern of pilot subcarriers for all 26-tone-DRUs, thereby avoiding pilot clustering and the increased impact of narrowband interference at the receiver on performance.

[0371] Accordingly, the DRU assigned to a site can be one of the multiple DRUs shown in Table 14 or Table 15, or the DRU assigned to a site can be one of multiple predefined DRUs, which can be any number of DRUs shown in Table 14 or Table 15.

[0372] It is understandable that the pilot designs given in Tables 14 and 15 are only one possible pilot implementation of the tone plan shown in Tables 11A and 11C. Other variations are possible in practical applications. If all DRU pilot subcarriers in the tone plan shown in Tables 11A to 11C are shifted to the right by k, then all DRU pilot subcarriers shown in Tables 14 and 15 are also shifted to the right by k. That is, the subcarrier index of all pilot subcarriers contained in all DRUs is simultaneously increased by k, for example, k is 0, 1, or 2. The shifted pilot subcarriers still satisfy the above characteristics.

[0373] It is understandable that the pilot designs given in Tables 14 and 15 are only one possible design that satisfies the above characteristics. In specific applications, there may be other pilot designs that satisfy the above characteristics.

[0374] It is understood that the above embodiments can be implemented individually or in combination, and this application does not impose any restrictions.

[0375] The methods provided by the embodiments of this application have been described above with reference to the accompanying drawings. The apparatus provided by the embodiments of this application will be described below with reference to the accompanying drawings.

[0376] Based on the same technical concept, embodiments of this application provide a communication device, which includes a module / unit / means for performing the methods executed by the transmitting device and / or receiving device in the above-described method embodiments. This module / unit / means can be implemented in software, or in hardware, or implemented in hardware executing corresponding software.

[0377] For example, see Figure 7 The device may include a transceiver module 1101 and a processing module 1102.

[0378] For example, when the device is a station or when the device is located on a station:

[0379] Processing module 1102 is used to control transceiver module 1101 to receive trigger frames, which are used to indicate the DRUs allocated to the site;

[0380] The processing module 1102 is also used to control the transceiver module 1101 to send PPDU on the allocated DRU according to the trigger frame; wherein the discrete bandwidth of the allocated DRU is 60MHz.

[0381] For example, when the device is an access point or when the device is located on an access point:

[0382] Processing module 1102 is used to control transceiver module 1101 to send trigger frames, which are used to indicate the DRUs allocated to the site.

[0383] The processing module 1102 is also used to control the transceiver module 1101 to receive PPDUs on the allocated DRU; wherein the discrete bandwidth of the allocated DRU is 60MHz.

[0384] It should be understood that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0385] In practical implementation, the above-mentioned device can take many product forms. Several possible product forms are introduced below.

[0386] like Figure 8 As shown in the illustration, this application also provides a communication device, including:

[0387] At least one processor 1201; and a communication interface 1203 communicatively connected to the at least one processor 1201; the at least one processor 1201 causes the device to perform the method steps in the above method embodiment through the communication interface 1203 by executing instructions stored in the memory 1202.

[0388] Optionally, the memory 1202 is located outside the device.

[0389] Optionally, the device includes the memory 1202, which is connected to the at least one processor 1201, and stores instructions executable by the at least one processor 1201. (See attached image) Figure 8 The dashed line indicates that memory 1202 is optional for the device.

[0390] The processor 1201 and the memory 1202 can be coupled through an interface circuit or integrated together; no restriction is imposed here.

[0391] This application embodiment does not limit the specific connection medium between the processor 1201, memory 1202, and communication interface 1203. This application embodiment... Figure 8 The processor 1201, memory 1202, and communication interface 1203 are connected via a bus 1204. Figure 8 The connections between other components are shown in bold and are for illustrative purposes only, not as limiting information. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0392] Based on the same technical concept, this application also provides a chip, see [link to relevant documentation]. Figure 9 The chip may include logic circuitry and input / output interfaces. Optionally, it may also include a memory. The input / output interfaces can be used to receive code instructions (stored in the memory, which can be read directly from the memory or via other devices) and transmit them to the logic circuitry; the logic circuitry can be used to execute the code instructions to perform the methods described in the above method embodiments.

[0393] It should be understood that the processor mentioned in the embodiments of this application can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc. When implemented in software, the processor can be a general-purpose processor, implemented by reading software code stored in memory.

[0394] For example, the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0395] It should be understood that the memory mentioned in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0396] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0397] It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

[0398] Based on the same technical concept, this application also provides a computer-readable storage medium storing a computer program or instructions, which, when executed by a communication device, implements the method steps described in the above method embodiments.

[0399] Based on the same technical concept, this application also provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are run by a communication device, the method steps in the above method embodiments are executed.

[0400] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0401] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0402] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0403] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

Claims

1. A communication method, characterized in that, Applied to a site, the method includes: Receive a trigger frame, the trigger frame being used to indicate a Distributed Resource Unit (DRU) allocated to the site; Physical layer protocol data unit (PPDU) is sent on the allocated DRU according to the trigger frame; The discrete bandwidth of the allocated DRU is 60MHz.

2. A communication method, characterized in that, Applied to an access point, the method includes: Send a trigger frame, the trigger frame being used to indicate the Distributed Resource Unit (DRU) allocated to the site; Physical layer protocol data unit (PPDU) is received on the allocated DRU; The discrete bandwidth of the allocated DRU is 60MHz.

3. The method as described in claim 1 or 2, characterized in that, The assigned DRU is any of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers of the 26-tone-DRU with index 1 have subcarrier indices of -473+k and -176+k; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -242+k and 136+k; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -440+k and -143+k; The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -209+k and 169+k. The 26-tone-DRU with index 5 includes pilot subcarriers with subcarrier indices of -407+k and -110+k. The 26-tone-DRU with index 6 includes pilot subcarriers with indices of -308+k and 70+k. The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -374+k and -77+k. A 26-tone-DRU with index 8, wherein the pilot subcarriers of the 26-tone-DRU with index 8 have subcarrier indices of -275+k and 103+k; The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -341+k and -44+k. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -418+k and -121+k. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -187+k and 191+k. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -385+k and -88+k. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -451+k and -154+k. The 26-tone-DRU with index 14 includes pilot subcarrier indices of -352+k and -55+k. The 26-tone-DRU with index 15 includes pilot subcarriers with indices of -253+k and 125+k. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -319+k and 59+k. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -220+k and 158+k. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -286+k and 92+k. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -363+k and -66+k. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -429+k and -132+k. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -330+k and 48+k. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -396+k and -99+k. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -297+k and 81+k. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -198+k and 180+k. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -264+k and 114+k. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -462+k and -165+k. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -231+k and 147+k. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -176+k, -242+k, and 136+k. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -440+k, -143+k, -209+k, and 169+k. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -308+k and 70+k and -374+k and -77+k. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -275+k, 103+k, -341+k, and -44+k. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -418+k, -121+k, -187+k, and 191+k. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -385+k, -88+k, -451+k, and -154+k. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -253+k and 125+k and -319+k and 59+k; The 52-tone-DRU with index 8 includes pilot subcarrier indices of -220+k and 158+k and -286+k and 92+k. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -363+k, -66+k, -429+k, and -132+k. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -330+k and 48+k and -396+k and -99+k; The 52-tone-DRU with index 11 includes pilot subcarrier indices of -198+k and 180+k and -264+k and 114+k. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -462+k, -165+k, -231+k, and 147+k. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -209+k, -176+k, and 169+k. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -374+k, -275+k, -77+k, and 103+k. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -418+k, -385+k, -121+k, and -88+k. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -319+k, -220+k, 59+k, and 158+k. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -429+k, -330+k, -132+k, and 48+k. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -264+k, -231+k, 114+k, and 147+k. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -209+k, -176+k, 169+k, -374+k, -275+k, -77+k, and 103+k. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -418+k, -385+k, -121+k, -88+k, -319+k, -220+k, 59+k, and 158+k. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -429+k, -330+k, -132+k, 48+k, -264+k, -231+k, 114+k, and 147+k. Wherein, the value of k is 0 or 1.

4. The method as described in claim 1 or 2, characterized in that, The assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers of the 26-tone-DRU with index 1 have subcarrier indices of -473+k and -176+k; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -242+k and 136+k; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -440+k and -143+k; The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -209+k and 169+k. The 26-tone-DRU with index 5 includes pilot subcarriers with subcarrier indices of -407+k and -110+k. The 26-tone-DRU with index 6 includes pilot subcarriers with indices of -308+k and 70+k. The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -374+k and -77+k. A 26-tone-DRU with index 8, wherein the pilot subcarriers of the 26-tone-DRU with index 8 have subcarrier indices of -275+k and 103+k; The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -341+k and -44+k. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -418+k and -121+k. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -187+k and 191+k. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -385+k and -88+k. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -451+k and -154+k. The 26-tone-DRU with index 14 includes pilot subcarrier indices of -352+k and -55+k. The 26-tone-DRU with index 15 includes pilot subcarriers with indices of -253+k and 125+k. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -319+k and 59+k. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -220+k and 158+k. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -286+k and 92+k. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -363+k and -66+k. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -429+k and -132+k. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -330+k and 48+k. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -396+k and -99+k. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -297+k and 81+k. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -198+k and 180+k. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -264+k and 114+k. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -462+k and -165+k. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -231+k and 147+k. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -176+k, -242+k, and 136+k. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -440+k, -143+k, -209+k, and 169+k. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -308+k and 70+k and -374+k and -77+k. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -275+k, 103+k, -341+k, and -44+k. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -418+k, -121+k, -187+k, and 191+k. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -385+k, -88+k, -451+k, and -154+k. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -253+k and 125+k and -319+k and 59+k; The 52-tone-DRU with index 8 includes pilot subcarrier indices of -220+k and 158+k and -286+k and 92+k. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -363+k, -66+k, -429+k, and -132+k. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -330+k and 48+k and -396+k and -99+k; The 52-tone-DRU with index 11 includes pilot subcarrier indices of -198+k and 180+k and -264+k and 114+k. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -462+k, -165+k, -231+k, and 147+k. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -209+k, -176+k, and 169+k. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -374+k, -275+k, -77+k, and 103+k. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -418+k, -385+k, -121+k, and -88+k. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -319+k, -220+k, 59+k, and 158+k. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -429+k, -330+k, -132+k, and 48+k. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -264+k, -231+k, 114+k, and 147+k. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -209+k, -176+k, 169+k, -374+k, -275+k, -77+k, and 103+k. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -418+k, -385+k, -121+k, -88+k, -319+k, -220+k, 59+k, and 158+k. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -429+k, -330+k, -132+k, 48+k, -264+k, -231+k, 114+k, and 147+k. Wherein, the value of k is 0 or 1.

5. The method as described in claim 1 or 2, characterized in that, The assigned DRU is any of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers of the 26-tone-DRU with index 1 have subcarrier indices of -473+k and -203+k; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -323+k and -53+k; The 26-tone-DRU with index 3 includes pilot subcarriers with indices of -413+k and -143+k. The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -263+k and 88+k. The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -353+k and -83+k. A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -443+k and -173+k; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -293+k and 58+k. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -383+k and -113+k. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -233+k and 118+k. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -283+k and 68+k. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -403+k and -133+k. The 26-tone-DRU with index 12 includes pilot subcarriers with subcarrier indices of -223+k and 128+k. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -343+k and -73+k. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -443+k and -163+k. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -253+k and 98+k. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -373+k and -103+k. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -463+k and -193+k. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -313+k and -43+k. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -363+k and -93+k. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -213+k and 138+k. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -303+k and 48+k. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -423+k and -153+k. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -243+k and 108+k. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -333+k and -63+k. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -453+k and -183+k. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -273+k and 78+k. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -393+k and -123+k. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -203+k, -323+k, and -53+k. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -413+k, -143+k, -263+k, and 88+k. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -443+k, -173+k, -293+k, and 58+k. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -383+k, -113+k, -233+k, and 118+k. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -283+k, 68+k, -403+k, and -133+k. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -223+k, 128+k, -343+k, and -73+k. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -253+k and 98+k and -373+k and -103+k. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -463+k, -193+k, -313+k, and -43+k. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -363+k, -93+k, -213+k, and 138+k. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -303+k, 48+k, -423+k, and -153+k. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -333+k, -63+k, -453+k, and -183+k. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -273+k and 78+k and -393+k and -123+k. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -263+k, -203+k, and 88+k. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -443+k, -233+k, -173+k, and 118+k. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -403+k, -223+k, -133+k, and 128+k. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -373+k, -313+k, -103+k, and -43+k. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -363+k, -303+k, -93+k, and 48+k. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -453+k, -273+k, -183+k, and 78+k. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -263+k, -203+k, 88+k, -443+k, -233+k, -173+k, and 118+k. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -403+k, -223+k, -133+k, 128+k, -373+k, -313+k, -103+k, and -43+k. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -363+k, -303+k, -93+k, 48+k, -453+k, -273+k, -183+k, and 78+k. Wherein, the value of k is 0 or 1.

6. The method as described in claim 1 or 2, characterized in that, The assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers of the 26-tone-DRU with index 1 have subcarrier indices of -473+k and -203+k; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -323+k and -53+k; The 26-tone-DRU with index 3 includes pilot subcarriers with indices of -413+k and -143+k. The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -263+k and 88+k. The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -353+k and -83+k. A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -443+k and -173+k; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -293+k and 58+k. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -383+k and -113+k. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -233+k and 118+k. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -283+k and 68+k. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -403+k and -133+k. The 26-tone-DRU with index 12 includes pilot subcarriers with subcarrier indices of -223+k and 128+k. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -343+k and -73+k. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -443+k and -163+k. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -253+k and 98+k. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -373+k and -103+k. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -463+k and -193+k. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -313+k and -43+k. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -363+k and -93+k. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -213+k and 138+k. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -303+k and 48+k. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -423+k and -153+k. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -243+k and 108+k. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -333+k and -63+k. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -453+k and -183+k. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -273+k and 78+k. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -393+k and -123+k. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -203+k, -323+k, and -53+k. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -413+k, -143+k, -263+k, and 88+k. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -443+k, -173+k, -293+k, and 58+k. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -383+k, -113+k, -233+k, and 118+k. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -283+k, 68+k, -403+k, and -133+k. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -223+k, 128+k, -343+k, and -73+k. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -253+k and 98+k and -373+k and -103+k. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -463+k, -193+k, -313+k, and -43+k. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -363+k, -93+k, -213+k, and 138+k. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -303+k, 48+k, -423+k, and -153+k. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -333+k, -63+k, -453+k, and -183+k. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -273+k and 78+k and -393+k and -123+k. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -263+k, -203+k, and 88+k. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -443+k, -233+k, -173+k, and 118+k. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -403+k, -223+k, -133+k, and 128+k. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -373+k, -313+k, -103+k, and -43+k. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -363+k, -303+k, -93+k, and 48+k. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -453+k, -273+k, -183+k, and 78+k. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -473+k, -263+k, -203+k, 88+k, -443+k, -233+k, -173+k, and 118+k. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -403+k, -223+k, -133+k, 128+k, -373+k, -313+k, -103+k, and -43+k. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -363+k, -303+k, -93+k, 48+k, -453+k, -273+k, -183+k, and 78+k. Wherein, the value of k is 0 or 1.

7. The method as described in claim 1 or 2, characterized in that, The assigned DRU is any of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -462 and -192; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -342 and 77; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -402 and -60; The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -282 and 137. The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -222 and 197. A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -432 and -90; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -312 and 107. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -372 and 47. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -252 and 167. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -352 and 67. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -232 and 187. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -292 and 127. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -442 and -172. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -382 and -40. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -322 and 97. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -202 and 217. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -262 and 157. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -412 and -70. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -272 and 147. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -422 and -80. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -212 and 207. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -362 and 57. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -302 and 117. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -242 and 177. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -392 and -50. The 26-tone-DRU with index 26 includes pilot subcarriers with indices of -452 and -182. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -332 and 87. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -462, -192, -342, and 77. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -402, -60, -282, and 137. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -432, -90, -312, and 107. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -372 and 47 and -252 and 167. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -352 and 67 and -232 and 187. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -292 and 127 and -442 and -172. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -322 and 97 and -202 and 217. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -262 and 157 and -412 and -70. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -272 and 147 and -422 and -80. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -212 and 207 and -362 and 57. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -242 and 177 and -392 and -50. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -452, -182, -332, and 87. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -462, -282, -192, and 137. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -432, -252, -90, and 167. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -352 and -292 and 67 and 127. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -322 and -262 and 97 and 157. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -422, -212, -80, and 207. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -392, -332, -50, and 87. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -462 and -282 and -192 and 137 and -432 and -252 and -90 and 167. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -352 and -292 and 67 and 127 and -322 and -262 and 97 and 157. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -422 and -212 and -80 and 207 and -392 and -332 and -50 and 87.

8. The method as described in claim 1 or 2, characterized in that, The assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -462 and -192; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -342 and 77; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -402 and -60; The 26-tone-DRU with index 4 includes pilot subcarriers with indices of -282 and 137. The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -222 and 197. A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -432 and -90; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -312 and 107. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -372 and 47. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -252 and 167. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -352 and 67. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -232 and 187. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -292 and 127. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -442 and -172. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -382 and -40. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -322 and 97. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -202 and 217. The 26-tone-DRU with index 17 includes pilot subcarrier indices of -262 and 157. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -412 and -70. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -272 and 147. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -422 and -80. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -212 and 207. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -362 and 57. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -302 and 117. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -242 and 177. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -392 and -50. The 26-tone-DRU with index 26 includes pilot subcarriers with indices of -452 and -182. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -332 and 87. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -462, -192, -342, and 77. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -402, -60, -282, and 137. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -432, -90, -312, and 107. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -372 and 47 and -252 and 167. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -352 and 67 and -232 and 187. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -292 and 127 and -442 and -172. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -322 and 97 and -202 and 217. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -262 and 157 and -412 and -70. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -272 and 147 and -422 and -80. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -212 and 207 and -362 and 57. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -242 and 177 and -392 and -50. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -452, -182, -332, and 87. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -462, -282, -192, and 137. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -432, -252, -90, and 167. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -352 and -292 and 67 and 127. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -322 and -262 and 97 and 157. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -422, -212, -80, and 207. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -392, -332, -50, and 87. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -462 and -282 and -192 and 137 and -432 and -252 and -90 and 167. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -352 and -292 and 67 and 127 and -322 and -262 and 97 and 157. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -422 and -212 and -80 and 207 and -392 and -332 and -50 and 87.

9. The method as described in claim 1 or 2, characterized in that, The assigned DRU is any of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -460 and -163; The 26-tone-DRU with index 2 includes pilot subcarriers with indices of -229 and 149. The 26-tone-DRU with index 3 includes pilot subcarriers with indices of -427 and -130. A 26-tone-DRU with index 4, wherein the pilot subcarriers included in the 26-tone-DRU with index 4 have subcarrier indices of -196 and 182; The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -394 and -97. The 26-tone-DRU with index 6 includes pilot subcarriers with indices of -295 and 83. The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -361 and -64. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -262 and 116. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -328 and 50. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -405 and -108. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -174 and 204. The 26-tone-DRU with index 12 includes pilot subcarriers with indices of -372 and -75. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -438 and -141. The 26-tone-DRU with index 14 includes pilot subcarrier indices of -339 and -42. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -240 and 138. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -306 and 72. The 26-tone-DRU with index 17 includes pilot subcarriers with indices of -207 and 171. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -273 and 105. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -350 and -53. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -416 and -119. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -317 and 61. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -383 and -86. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -284 and 94. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -185 and 193. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -251 and 127. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -449 and -152. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -218 and 160. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -460, -163, -229, and 149. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -427, -130, -196, and 182. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -295 and 83 and -361 and -64. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -262 and 116 and -328 and 50. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -405, -108, -174, and 204. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -372, -75, -438, and -141. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -240 and 138 and -306 and 72. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -207 and 171 and -273 and 105. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -350, -53, -416, and -119. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -317 and 61 and -383 and -86. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -185 and 193 and -251 and 127. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -449, -152, -218, and 160. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -460, -196, -163, and 182. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -361, -262, -64, and 116. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -405, -372, -108, and -75. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -306, -207, 72, and 171. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -416, -317, -119, and 61. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -251 and -218 and 127 and 160. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -460 and -196 and -163 and 182 and -361 and -262 and -64 and 116. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -405 and -372 and -108 and -75 and -306 and -207 and 72 and 171. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -416, -317, -119, 61, -251, -218, 127, and 160.

10. The method as described in claim 1 or 2, characterized in that, The assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -460 and -163; The 26-tone-DRU with index 2 includes pilot subcarriers with indices of -229 and 149. The 26-tone-DRU with index 3 includes pilot subcarriers with indices of -427 and -130. A 26-tone-DRU with index 4, wherein the pilot subcarriers included in the 26-tone-DRU with index 4 have subcarrier indices of -196 and 182; The 26-tone-DRU with index 5 includes pilot subcarriers with indices of -394 and -97. The 26-tone-DRU with index 6 includes pilot subcarriers with indices of -295 and 83. The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -361 and -64. The 26-tone-DRU with index 8 includes pilot subcarriers with indices of -262 and 116. The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -328 and 50. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -405 and -108. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -174 and 204. The 26-tone-DRU with index 12 includes pilot subcarriers with indices of -372 and -75. The 26-tone-DRU with index 13 includes pilot subcarrier indices of -438 and -141. The 26-tone-DRU with index 14 includes pilot subcarrier indices of -339 and -42. The 26-tone-DRU with index 15 includes pilot subcarrier indices of -240 and 138. The 26-tone-DRU with index 16 includes pilot subcarrier indices of -306 and 72. The 26-tone-DRU with index 17 includes pilot subcarriers with indices of -207 and 171. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -273 and 105. The 26-tone-DRU with index 19 includes pilot subcarrier indices of -350 and -53. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -416 and -119. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -317 and 61. The 26-tone-DRU with index 22 includes pilot subcarrier indices of -383 and -86. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -284 and 94. The 26-tone-DRU with index 24 includes pilot subcarrier indices of -185 and 193. The 26-tone-DRU with index 25 includes pilot subcarrier indices of -251 and 127. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -449 and -152. The 26-tone-DRU with index 27 includes pilot subcarrier indices of -218 and 160. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -460, -163, -229, and 149. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -427, -130, -196, and 182. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -295 and 83 and -361 and -64. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -262 and 116 and -328 and 50. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -405, -108, -174, and 204. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -372, -75, -438, and -141. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -240 and 138 and -306 and 72. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -207 and 171 and -273 and 105. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -350, -53, -416, and -119. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -317 and 61 and -383 and -86. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -185 and 193 and -251 and 127. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -449, -152, -218, and 160. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -460, -196, -163, and 182. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -361, -262, -64, and 116. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -405, -372, -108, and -75. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -306, -207, 72, and 171. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -416, -317, -119, and 61. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -251 and -218 and 127 and 160. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -460 and -196 and -163 and 182 and -361 and -262 and -64 and 116. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -405 and -372 and -108 and -75 and -306 and -207 and 72 and 171. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -416, -317, -119, 61, -251, -218, 127, and 160.

11. The method as described in claim 1 or 2, characterized in that, The assigned DRU is any of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -460 and -190; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -310 and -40; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -400 and -130; A 26-tone-DRU with index 4, wherein the pilot subcarriers included in the 26-tone-DRU with index 4 have subcarrier indices of -250 and 101; A 26-tone-DRU with index 5, wherein the pilot subcarriers of the 26-tone-DRU with index 5 have subcarrier indices of -340 and -70; A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -430 and -160; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -280 and 71. A 26-tone-DRU with index 8, wherein the pilot subcarriers included in the 26-tone-DRU with index 8 have subcarrier indices of -370 and -100; The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -220 and 131. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -270 and 81. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -390 and -120. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -210 and 141. The 26-tone-DRU with index 13 includes pilot subcarriers with indices of -330 and -60. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -420 and -150. The 26-tone-DRU with index 15 includes pilot subcarriers with indices of -240 and 111. The 26-tone-DRU with index 16 includes pilot subcarriers with indices of -360 and -90. The 26-tone-DRU with index 17 includes pilot subcarriers with indices of -450 and -180. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -300 and 51. The 26-tone-DRU with index 19 includes pilot subcarriers with indices of -350 and -80. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -200 and 151. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -290 and 61. The 26-tone-DRU with index 22 includes pilot subcarriers with indices of -410 and -140. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -230 and 121. The 26-tone-DRU with index 24 includes pilot subcarriers with indices of -320 and -50. The 26-tone-DRU with index 25 includes pilot subcarriers with indices of -440 and -170. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -260 and 91. The 26-tone-DRU with index 27 includes pilot subcarriers with indices of -380 and -110. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -460, -190, -310, and -40. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -400, -130, -250, and 101. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -430, -160, -280, and 71. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -370, -100, -220, and 131. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -270 and 81 and -390 and -120. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -210 and 141 and -330 and -60. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -240 and 111 and -360 and -90. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -450, -180, -300, and 51. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -350, -80, -200, and 151. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -290 and 61 and -410 and -140. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -320, -50, -440, and -170. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -260 and 91 and -380 and -110. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -460, -250, -190, and 101. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -430, -220, -160, and 131. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -390, -210, -120, and 141. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -360, -300, -90, and 51. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -350, -290, -80, and 61. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -440, -260, -170, and 91. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -460 and -250 and -190 and 101 and -430 and -220 and -160 and 131. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -390 and -210 and -120 and 141 and -360 and -300 and -90 and 51. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -350 and -290 and -80 and 61 and -440 and -260 and -170 and 91.

12. The method as described in claim 1 or 2, characterized in that, The assigned DRU belongs to a plurality of predefined DRUs, which include at least two of the following: A 26-tone-DRU with index 1, wherein the pilot subcarriers included in the 26-tone-DRU with index 1 have subcarrier indices of -460 and -190; A 26-tone-DRU with index 2, wherein the pilot subcarriers included in the 26-tone-DRU with index 2 have subcarrier indices of -310 and -40; A 26-tone-DRU with index 3, wherein the pilot subcarriers included in the 26-tone-DRU with index 3 have subcarrier indices of -400 and -130; A 26-tone-DRU with index 4, wherein the pilot subcarriers included in the 26-tone-DRU with index 4 have subcarrier indices of -250 and 101; A 26-tone-DRU with index 5, wherein the pilot subcarriers of the 26-tone-DRU with index 5 have subcarrier indices of -340 and -70; A 26-tone-DRU with index 6, wherein the pilot subcarriers of the 26-tone-DRU with index 6 have subcarrier indices of -430 and -160; The 26-tone-DRU with index 7 includes pilot subcarriers with indices of -280 and 71. A 26-tone-DRU with index 8, wherein the pilot subcarriers included in the 26-tone-DRU with index 8 have subcarrier indices of -370 and -100; The 26-tone-DRU with index 9 includes pilot subcarriers with indices of -220 and 131. The 26-tone-DRU with index 10 includes pilot subcarrier indices of -270 and 81. The 26-tone-DRU with index 11 includes pilot subcarrier indices of -390 and -120. The 26-tone-DRU with index 12 includes pilot subcarrier indices of -210 and 141. The 26-tone-DRU with index 13 includes pilot subcarriers with indices of -330 and -60. The 26-tone-DRU with index 14 includes pilot subcarriers with indices of -420 and -150. The 26-tone-DRU with index 15 includes pilot subcarriers with indices of -240 and 111. The 26-tone-DRU with index 16 includes pilot subcarriers with indices of -360 and -90. The 26-tone-DRU with index 17 includes pilot subcarriers with indices of -450 and -180. The 26-tone-DRU with index 18 includes pilot subcarrier indices of -300 and 51. The 26-tone-DRU with index 19 includes pilot subcarriers with indices of -350 and -80. The 26-tone-DRU with index 20 includes pilot subcarrier indices of -200 and 151. The 26-tone-DRU with index 21 includes pilot subcarrier indices of -290 and 61. The 26-tone-DRU with index 22 includes pilot subcarriers with indices of -410 and -140. The 26-tone-DRU with index 23 includes pilot subcarrier indices of -230 and 121. The 26-tone-DRU with index 24 includes pilot subcarriers with indices of -320 and -50. The 26-tone-DRU with index 25 includes pilot subcarriers with indices of -440 and -170. The 26-tone-DRU with index 26 includes pilot subcarrier indices of -260 and 91. The 26-tone-DRU with index 27 includes pilot subcarriers with indices of -380 and -110. The 52-tone-DRU with index 1 includes pilot subcarrier indices of -460, -190, -310, and -40. The 52-tone-DRU with index 2 includes pilot subcarrier indices of -400, -130, -250, and 101. The 52-tone-DRU with index 3 includes pilot subcarrier indices of -430, -160, -280, and 71. The 52-tone-DRU with index 4 includes pilot subcarrier indices of -370, -100, -220, and 131. The 52-tone-DRU with index 5 includes pilot subcarrier indices of -270 and 81 and -390 and -120. The 52-tone-DRU with index 6 includes pilot subcarrier indices of -210 and 141 and -330 and -60. The 52-tone-DRU with index 7 includes pilot subcarrier indices of -240 and 111 and -360 and -90. The 52-tone-DRU with index 8 includes pilot subcarrier indices of -450, -180, -300, and 51. The 52-tone-DRU with index 9 includes pilot subcarrier indices of -350, -80, -200, and 151. The 52-tone-DRU with index 10 includes pilot subcarrier indices of -290 and 61 and -410 and -140. The 52-tone-DRU with index 11 includes pilot subcarrier indices of -320, -50, -440, and -170. The 52-tone-DRU with index 12 includes pilot subcarrier indices of -260 and 91 and -380 and -110. The 106-tone-DRU with index 1 includes pilot subcarrier indices of -460, -250, -190, and 101. The 106-tone-DRU with index 2 includes pilot subcarrier indices of -430, -220, -160, and 131. The 106-tone-DRU with index 3 includes pilot subcarrier indices of -390, -210, -120, and 141. The 106-tone-DRU with index 4 includes pilot subcarrier indices of -360, -300, -90, and 51. The 106-tone-DRU with index 5 includes pilot subcarrier indices of -350, -290, -80, and 61. The 106-tone-DRU with index 6 includes pilot subcarrier indices of -440, -260, -170, and 91. The 242-tone-DRU with index 1 includes pilot subcarrier indices of -460 and -250 and -190 and 101 and -430 and -220 and -160 and 131. The 242-tone-DRU with index 2 includes pilot subcarrier indices of -390 and -210 and -120 and 141 and -360 and -300 and -90 and 51. The 242-tone-DRU with index 3 includes pilot subcarrier indices of -350 and -290 and -80 and 61 and -440 and -260 and -170 and 91.

13. A communication device, characterized in that, It includes a module for performing the method as described in any one of claims 1, 3-12, or includes a module for performing the method as described in any one of claims 2, 3-12.

14. A communication device, characterized in that, It includes at least one processor; and a communication interface communicatively connected to the at least one processor; the at least one processor executes instructions stored in memory to cause the method as described in any one of claims 1, 3-12 to be executed, or to cause the method as described in any one of claims 2, 3-12 to be executed.

15. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions that, when executed, enable the method described in any one of claims 1, 3-12, or the method described in any one of claims 2, 3-12.

16. A computer program product, characterized in that, Includes instructions that, when executed on a computer, cause the method as described in any one of claims 1, 3-12 to be implemented, or cause the method as described in any one of claims 2, 3-12 to be implemented.

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