DRILLING INFORMATION INDICATION METHOD AND COMMUNICATION APPARATUS.

Abstract

This application provides a method for indicating punch-in information and a communication device. A transmitting device sends preamble punch-in information on a first content channel, and the total bandwidth of the first content channel is less than the bandwidth of a physical layer protocol data unit (PPDU). Therefore, some subchannels within the PPDU are reused. Compared to sending preamble punch-in information on all subchannels, this method can reduce signaling overhead. Furthermore, a receiving device can determine the usage status of a PPDU channel upon receiving the preamble punch-in information.

Description

DRILLING INFORMATION INDICATION METHOD AND COMMUNICATION APPARATUS This application claims priority to Chinese Patent Application No. 202010028613.1, filed with the National Intellectual Property Administration of China on January 11, 2020, and entitled 'METHOD OF INDICATING DRILLING INFORMATION AND COMMUNICATION APPARATUS', which is incorporated herein by reference in its entirety. FIELD OF INVENTION This application relates to the field of communication technologies and, in particular, to a method of indicating drilling information and a communication apparatus. BACKGROUND OF THE INVENTION There are many generations of wireless local area network (WLAN) standards after years of development, including 802.11a / b / g, 802.11η, 802.11ac, 802.11ax, and similar standards, and 802.11be has been analyzed. In terms of bandwidth configurations, 802.11ax supports the following bandwidth settings: 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 80 + 80 MHz. For example, in 802.11ax, when a bandwidth of 160 MHz is configured, the channel division is shown in Figure 1. In this case, if a 20 MHz secondary channel is occupied, a transmitting end can send preamble punch information to a receiving end to prevent incorrect reception by the receiving end on the 20 MHz secondary channel. Therefore, the way in which the transmitting end sends the preamble punch information to enable the receiving end to obtain the preamble punch information remains a problem that needs to be solved. BRIEF DESCRIPTION OF THE INVENTION This request provides a method for indicating punch information and a communication device, so that preamble punch information can be sent on a first content channel. This avoids sending preamble punch information on all subchannels and reduces signaling overhead. According to the first aspect, this application provides a method for indicating drilling information, which includes: generate a physical layer protocol data unit (PHY protocol data unit, PPDU) that includes a preamble, wherein the preamble includes preamble puncturing information; and send the preamble puncturing information on a first content channel, wherein a total bandwidth of the first content channel is less than a bandwidth of the PPDU. In this application configuration, the content carried in the first content channel is the preamble punch information, and the first content channel is distributed across several PPDU channels. For example, the first content channel can be distributed across several consecutive PPDU subchannels, or it can be distributed across several non-consecutive PPDU subchannels. According to the technical solution provided in this request, the preamble punch information is sent on the first content channel, and the total bandwidth of the first content channel is less than the bandwidth of the PPDU. In other words, a transmission device reuses some PPDU subchannels to send the preamble punch information. Compared to sending the preamble punch information on all PPDU subchannels under indication by using a dedicated field, this method can reduce signaling overhead. According to a second aspect, this application provides a method for indicating drilling information, which includes: to receive preamble puncturing information on a first content channel, where the preamble puncturing information is included in a preamble of a physical layer protocol data unit (PHY protocol data unit, PPDU), and a total bandwidth of the first content channel is less than a bandwidth of the PPDU; and to determine a usage status of a PPDU channel based on the preamble puncturing information. In a possible implementation of the first aspect or the second aspect, the preamble further includes location indication information, and the location indication information indicates a frequency domain location of the first content channel. According to the technical solution provided in this application, a receiving device can obtain, by using location indication information, the frequency domain location of the first content channel, in order to receive preamble punch information on the first content channel. In a possible implementation of the first or second aspect, the location indication information is located in a universal field (Universal GIS, U-GIS), and the preamble drilling information is located in a field after the U-GIS field. In a possible implementation of the first aspect or the second aspect, the first content channel includes an odd-numbered subchannel, the first content channel includes an even-numbered subchannel, or the first content channel includes a specified subchannel, where a subchannel bandwidth is a fixed value. ML / t / ZUZZ / U í UO J4 In this application format, the subchannel bandwidth can be 10 MHz, 20 MHz, 30 MHz, 40 MHz, or similar. The frequency domain location of the first content channel can be preset or specified using location indication information. In a possible implementation of the first or second aspect, if the first content channel includes a subchannel corresponding to a secondary bandwidth of 40 MHz, the PPDU bandwidth is 80 MHz; if the first content channel includes a subchannel corresponding to a second secondary bandwidth of 80 MHz, the PPDU bandwidth is 160 MHz; if the first content channel includes a subchannel corresponding to a third secondary bandwidth of 80 MHz, the PPDU bandwidth is 240 MHz; and if the first content channel includes a subchannel corresponding to a secondary bandwidth of 160 MHz, the PPDU bandwidth is 320 MHz. A first secondary bandwidth of 80 MHz can be understood as a first bandwidth of 80 MHz in which a primary bandwidth of 20 MHz is located. Optionally, the first content channel may also include an odd-numbered subchannel, an even-numbered subchannel, or a specified subchannel corresponding to the secondary bandwidth of 40 MHz. According to a third aspect, this request provides a communication apparatus configured to perform the method in accordance with either of the first aspect or its possible implementations. Specifically, the communication apparatus includes a corresponding unit that performs the method in accordance with either of the first aspect or its possible implementations. According to a fourth aspect, this request provides a communication apparatus configured to perform the method in accordance with either of the second aspect or its possible implementations. Specifically, the communication apparatus includes a corresponding unit that performs the method in accordance with either of the second aspect or its possible implementations. According to a fifth aspect, this request provides a computer-readable storage medium, configured to store a computer program used to perform the first aspect and possible implementations of the first aspect. According to a sixth aspect, this request provides a computer-readable storage medium, configured to store a computer program used to perform the second aspect and possible implementations of the second aspect. According to a seventh aspect, this request provides a program product ML / t / ZUZZ / U í UO J4 of computer, which includes computer code or instructions. When the computer code or instructions are executed, the method is implemented according to any of the first aspect or possible implementations of the first aspect. According to an eighth aspect, this request provides a computer program product, which includes computer code or instructions. When the computer code or instructions are executed, the method is implemented according to any of the second aspect or possible implementations of the second aspect. According to a ninth aspect, this request provides a computer program, configured to perform the first aspect and possible implementations of the first aspect. According to a tenth aspect, this request provides a computer program, configured to perform the second aspect and possible implementations of the second aspect. According to an eleventh aspect, this application provides a wireless communication system, which includes a transmitting device and a receiving device. The transmitting device is configured to implement the first aspect and possible implementations thereof, and the receiving device is configured to implement the second aspect and possible implementations thereof. BRIEF DESCRIPTION OF THE FIGURES FIGURE 1 is a schematic channel division diagram when a bandwidth is 160 MHz according to one modality of this application; FIGURE 2 is an architectural, schematic diagram of a communication system according to one modality of this request; FIGURE 3 is a schematic flowchart of a method for indicating drilling information in accordance with a modality of this application; FIGURE 4 is a schematic diagram of the formats of some fields of a MU PPDU according to one modality of this application; FIGURE 5 is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 6A is a schematic diagram of a format of a first symbol of a universal field according to a modality of this request; FIGURE 6B is a schematic diagram of a format of a first symbol of a universal field according to a modality of this request; FIGURE 7A is a schematic diagram of a format of a second symbol of a universal field according to a modality of this request; FIGURE 7B is a schematic diagram of a format of a second symbol of a universal field according to a modality of this request; FIGURE 8 is a schematic diagram of a division of a field after a universal field of a PPDU according to a modality of this application; FIGURE 9 is a schematic diagram of a first content channel location according to one modality of this request; FIGURE 10 is a schematic diagram of the distribution of preamble drilling information and location indication information according to a modality of this application; FIGURE 11 is a schematic diagram of a location indication information structure according to one modality of this application; FIGURE 12 is a schematic diagram of preamble punching information when a preamble punching mode is 7 according to a modality of this application; FIGURE 13 is a schematic diagram of a first field format according to one modality of this application; FIGURE 14 is a schematic diagram of the formats of some fields of a SU PPDU according to one modality of this request; FIGURE 15 is a schematic diagram of the formats of some fields of a MU PPDU according to one modality of this application; FIGURE 16 is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 17 is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 18A is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 18B is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 19 is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; FIGURE 20 is a schematic diagram of a location indication information structure according to one modality of this application; FIGURE 21 is a schematic diagram of the formats of some fields of a PPDU according to one modality of this request; and FIGURE 22 is a schematic block diagram of a communication apparatus according to one modality of this application. ML / í UO J4 DETAILED DESCRIPTION OF THE INVENTION In the specification, claims, and accompanying figures of this application, the terms first, second, third, fourth, and the like are intended to distinguish between different objects, but not to indicate a particular order. Furthermore, the terms including, having, and any variant thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the enumerated steps or units, but optionally also includes an unenumerated step or unit, or optionally includes another step or unit inherent to the process, method, product, or device. The term "modality" in this specification means that a particular feature, structure, or characteristic described with reference to modalities can be included in at least one modality of this request. The phrase appearing in multiple locations in this specification may not necessarily mean the same modality, nor may it mean a modality that is independent of or optional to another modality. A person skilled in the art understands, explicitly and implicitly, that a modality described in this request can be combined with another modality. In this application, "at least one" means one or more, "a plurality" means two or more, and "at least two" means two or more (including three). The term "and / or" is used to describe an associative relationship to describe associated objects and represents that three relationships can exist. For example, A and / or B can represent the following three cases: Only A exists, only B exists, and both A and B exist, where A and B can be singular or plural. The character 7 generally indicates an "or" relationship between associated objects. "At least one of the following" or a similar expression of the same indicates any combination of these elements, including a single element or any combination of a plurality of elements. For example, "at least one" of a, boc can represent: a, b, c, "ayb", "ayc", "byc", or a, byc, where a and byc can be singular or plural. The following describes embodiments of this application with reference to the accompanying drawings. First, a network architecture in embodiments of this application is described. A method provided in this application can be applied to various communication systems such as an Internet of Things (IoT) system, a narrowband Internet of Things (NB-IoT) system, a long-term evolution (LTE) system, a fifth-generation (5G) communication system, and a new communication system (e.g., 6G) that emerges in the future development of communication. Furthermore, the method provided in this application can also be applied to a wireless local area network (WLAN) system. ML / t / ZUZZ / U í UO J4 local area network, WLAN), for example, wireless fidelity (Wi-Fi) and the like. The method provided in this application is also applicable to the following communication system. The communication system includes an access point (AP) and a station (STA). The access point can also be understood as an access point entity, and the station can also be understood as a station entity. For example, the modalities in this application can be applied to a communication scenario between an AP and an STA in a WLAN. Optionally, the AP can communicate with a single STA, or the AP can communicate simultaneously with multiple STAs. Specifically, the communication between the AP and multiple STAs can be further divided into downlink transmission, in which the AP simultaneously sends a signal to multiple STAs, and uplink transmission, in which multiple STAs send signals to the AP.For example, FIGURE 2 is an architectural, schematic diagram of a communication system according to one modality of this application. FIGURE 2 shows an access point device and two station devices, such as STA 1 and STA 2. An access point (AP) is a device used by a terminal, such as a mobile phone, to access a wired (or wireless) network. It is primarily deployed in homes, buildings, and parks. A typical coverage area ranges from tens of meters to one hundred meters. Access points can also be deployed outdoors. An AP acts as a bridge connecting a wired network to a wireless network. It is mainly used to connect wireless network clients to each other and then to connect the wireless network to the Ethernet network. Specifically, an AP can be a terminal device (e.g., a mobile phone) or a network device (e.g., a router) with a wireless fidelity (Wi-Fi) chip. The AP can support either the 802.11be standard or a later, next-generation standard.The access point (AP) can also be compatible with multiple wireless local area network (WLAN) standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a. The wireless communication terminal (STA) can be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example, the STA could be a mobile phone that supports Wi-Fi communication, a tablet computer that supports Wi-Fi communication, a set-top box that supports Wi-Fi communication, a smart TV that supports Wi-Fi communication, a smart wearable device that supports Wi-Fi communication, a vehicle-mounted communication device that supports Wi-Fi communication, or a computer that supports Wi-Fi communication. Optionally, the STA can be a device that supports a specific standard. ML / í UO J4 802.11be or a next-generation standard. The STA may also be compatible with a plurality of wireless local area network (WLAN) standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a. In this application, a transmitting device can be an access point device or a station device, and a receiving device can also be an access point device or a station device. For example, the transmitting device can be an access point device, and the receiving device can also be an access point device. As another example, the transmitting device is a station device, and the receiving device can also be a station device. As another example, the transmitting device is an access point device, and the receiving device is a station device. As yet another example, the transmitting device is a station device, and the receiving device is an access point device. It can be understood that in this modality of this application, an example in which the transmitting device sends a PPDU to the receiving device is used to describe a method of indicating piercing information provided in this modality of this application, and the method may be applicable to various types of PPDUs. For example, the PPDU may include a multi-user physical protocol data unit (MU PPDU), a single-user physical protocol data unit (SU PPDU), a trigger-based physical protocol data unit (TB PPDU), or similar. When the transmitting device sends preamble punch information to the receiving device, as shown in FIGURE 1, the transmitting device can use a PPDU channel to carry the preamble punch information, for example, sending the preamble punch information on subchannel 1 to subchannel 8. The previous method for sending preamble drilling information across all subchannels wasted resources and resulted in high signaling overhead. Therefore, this application provides a method for indicating drilling information to reduce signaling overhead and prevent wasted resources. Figure 3 is a schematic flowchart of a method for indicating drilling information in accordance with one modality of this application. As shown in Figure 3, the method includes the following steps. 301: A transmission device generates a PPDU that includes a preamble, wherein the preamble includes preamble punch information. 302: The transmission device sends the preamble punching information in ML / t / ZUZZ / U / UO J4 a first content channel, where a total bandwidth of the first content channel is less than a bandwidth of the PPDU. Accordingly, a receiving device receives the preamble punch information in the first content channel. The receiving device determines the usage status of a PPDU channel based on the preamble punch information. According to the technical solution provided in this application, the preamble punch information is sent on the first content channel, and the total bandwidth of the first content channel is less than the bandwidth of the PPDU. In other words, the transmitting device reuses some PPDU subchannels to send the preamble punch information. Compared to sending the preamble punch information on all PPDU subchannels under indication by using a dedicated field, this method can reduce signaling overhead. First, to better describe the first content channel in step 302 and the preamble punching information in step 301, the following describes a PPDU format in detail. Figure 4 is a schematic diagram of the formats of some fields in a PPDU MU according to one modality of this application. As shown in Figure 4, in 802.11ax, the PPDU MU may include a legacy short training field (L-STF), a legacy long training field (LLTF), a legacy signal field (L-SIG), a repeated legacy signal field (RL-SIG), a high-efficiency signal field A (HE-SIG-A), and a high-efficiency signal field B (HE-SIG-B). Figure 5 is a schematic diagram of the formats of some fields in a PPDU according to one modality of this application. As shown in Figure 5, the PPDU in 802.11be not only includes an L-STF, an L-LTF, an L-SIG, and an RL-SIG, but may also include a universal field (Universal SIG, U-SIG). The universal field may contain two symbols. It can be understood that the PPDU shown in Figure 5 may include a MU PPDU, and may also include a SU PPDU and similar symbols. In one possible implementation, the preamble punch information is located in the universal signaling field; or the preamble punch information is located in a field following the universal signaling field. For example, as shown in FIGURE 5, the field following the universal field might include an extremely high throughput signaling field (EHT-SIG). The preamble punch information can be understood to be located in the signaling field. ML / t / ZUZZ / U í UO J4 universal, and can also be referred to as the preamble punching information being carried in the universal signaling field. The two types of description are not limited in this modality of this application. In one possible implementation, the location indication information described below is placed within the universal signaling field. It can be understood that when both the location indication information and the preamble perforation information are placed within the universal signaling field, the location indication information can be placed within the first symbol of the universal signaling field, and the preamble perforation information can be placed within the second symbol of the universal signaling field. For example, when location indication information is located in the first symbol of the universal signaling field, and the number of bits of the location indication information is 4 bits, a format of the first symbol of the universal field is shown in FIGURE 6A and FIGURE 6B, and a format of the second symbol of the universal field is shown in FIGURE 7A and FIGURE 7B. Optionally, as shown in FIGURE 6A, the first symbol of the universal field may include a physical layer protocol data unit version (PPDU version) subfield, a basic service set color (BSS color) subfield, an indication information subfield, a reserved subfield, a cyclic redundancy code (ORO) subfield, and a tail bit subfield.Optionally, as shown in FIGURE 6B, the first symbol of the universal field may include a physical layer protocol data unit version (PPDU version) subfield, a basic service set color (BSS color) subfield, a PPDU format subfield, a transmit opportunity (TXOP) subfield, a location indication information subfield, and a reserved subfield. Optionally, as shown in FIGURE 7A, the second symbol of the universal field may include a physical layer protocol data unit format subfield, a transmit opportunity (TXOP) subfield, an uplink / downlink (UL / DL) subfield, a reserved subfield, a CRC subfield, and a tail bit subfield. Optionally, as shown in FIGURE 7B, the second symbol of the universal field may include an uplink / downlink (UL / DL) subfield, a reserved subfield, a CRC subfield, and a tail bit subfield. It can be understood that, in addition to the fields shown in FIGURE 6A, FIGURE 6B, FIGURE 7A and FIGURE 7B, the universal field may also include a subfield of ML / t / ZUZZ / Uí UO J4 spatial reuse, a guard interval + long training field (GI+LTF) subfield, a Doppler subfield, a space-time block code (STBC) subfield, a pre-fec padding factor subfield, a packet extension disambiguation subfield, and the like. It may be understood that the specific locations of the fields shown in FIGURE 6A, FIGURE 6B, FIGURE 7A, and FIGURE 7B are not limited in this modality of this application. As shown in FIGURE 8, for the sake of brevity, the fields following the universal field are successively replaced with SIG1, SIG2, SIG3 and the like. The first content channel in step 302 is described in detail below. In this application scenario, the content carried in the first content channel is the preamble punch information, and the first content channel is distributed across several PPDU channels. The first content channel can be distributed across several consecutive PPDU subchannels, or it can be distributed across several non-consecutive PPDU subchannels. For example, if the PPDU bandwidth is 320 MHz, the first content channel can be distributed across channels 1 through 16. This means the total bandwidth of the first content channel is less than 320 MHz. Furthermore, in this application format, different content channels are distinguished within a field following the U-SIG field. For example, the first and second content channels are distinguished within the SIG1 field. Preamble drilling information can be located in a field following the U-SIG field. For example, preamble drilling information can be located in the Nth field (SIGN field) following the U-SIG field, where N is greater than or equal to 1. For example, N = 1, N = 2, or N = 3. As another example, preamble drilling information can be located in a field following the U-SIG field, and the first content channel includes one or more subchannels. For example, preamble drilling information can be located in M ​​different consecutive fields following the U-SIG field, where M is greater than or equal to 1. For example, M = 1, M = 2, or M = 3.For example, the preamble drilling information may be located in the EHT-SIG field after the U-SIG field, and the first content channel may include subchannels corresponding to IDs 14 through 16. It can be understood that the M and N values ​​shown above can be preset or indicated by the location indication information. The description of the preamble drilling information is applicable to all of the following modalities. For example, as shown in FIGURE 9, the first content channel is a ML / í UO J4 part in which the SIG1 field is located in the subchannel corresponding to ID 16. In other words, the preamble punching information sent in the first content channel can be understood as the preamble punching information located in the SIG1 field in the subchannel corresponding to ID 16. In one possible implementation, the first content channel may include a preset subchannel. The first content channel may include a preset odd-numbered subchannel, a preset even-numbered subchannel, or a specified preset subchannel. The subchannel bandwidth is a fixed value. For example, the fixed value might be 20 MHz. Alternatively, the fixed value could be a bandwidth value with a different granularity. A specific fixed value is not limited in this application. It can be understood that the preset odd-numbered subchannels could be all odd-numbered subchannels, or some odd-numbered subchannels. Similarly, the preset even-numbered subchannels could be all even-numbered subchannels, or some even-numbered subchannels.It can be understood that the pre-established subchannel can be pre-established by a protocol, can be established by a device manufacturer or similar. As shown in Figure 9, an example is used where the PPDU bandwidth is 320 MHz and the subchannel bandwidth is 20 MHz. The odd-numbered subchannel corresponds to an identifier (ID) that is an odd number in Figure 9, and the even-numbered subchannel corresponds to an ID that is an even number in Figure 9. For example, the first content channel might include the subchannel corresponding to ID 16, and the subchannels corresponding to IDs 1 through 15 could be considered the second content channel. In this case, the second content channel is used to carry other information. In the technical solution for this request, the first content channel is predefined, and no dedicated information is needed to specify a frequency domain location for the first content channel. This further reduces signaling overhead. In one possible implementation, the transmitting device can indicate the frequency domain location of the first content channel using location indication information. As shown in Figure 10, the transmitting device can indicate the frequency domain location of the first content channel using location indication information, so that the receiving device receives the preamble punch information on the first content channel. Location indication information is described separately as follows. Solution 1 ML / í UO J4 The location indication information can specify whether the first content channel includes the odd-numbered subchannel or the even-numbered subchannel. The location indication information is 1 bit, as shown in Table 1 and Table 2. ML / t / ZUZZ / U í UO J4 Table 1 Value Definition 0 The first content channel includes the odd-numbered subchannel 1 The first content channel includes the even-numbered subchannel Table 2 Value Definition 1 The first content channel includes the odd-numbered subchannel 0 The first content channel includes the even-numbered subchannel It can be understood that, when the 1-bit location indication information indicates the frequency domain location of the first content channel, the first content channel can include all odd-numbered subchannels or all even-numbered subchannels. Solution 2 The location indication information may indicate any of the following: The first content channel includes the odd-numbered subchannel, the first content channel includes the even-numbered subchannel, or the first content channel includes the specified subchannel. For solution 2, the number of bits in the location indication information can be 2 bits, 3 bits, 4 bits, or 6 bits. It can be understood that, in the following different scenarios, the number of bits in the location indication information is related to the PPDU bandwidth and the subchannel bandwidth. For example, a larger PPDU bandwidth indicates a larger number of bits in the location indication information, and a larger subchannel bandwidth indicates a smaller number of bits in the location indication information. To better describe a specific way in which the location indication information is presented, the following provides a separate description using an example where the PPDU bandwidth is 320 MHz and the subchannel bandwidth is 20 MHz. Scenario 1: The number of bits in the location indication information is 2 bits. In this case, the location indication information can indicate any of the following: The first content channel includes all odd-numbered subchannels, the first content channel includes all even-numbered subchannels, or the first content channel includes the specified subchannel. Furthermore, the specified subchannel is preset. For example, if the location indication information is 00, it indicates that the first content channel includes all odd-numbered subchannels; if the location indication information is 01, it indicates that the first content channel includes all even-numbered subchannels; and if the location indication information is 10, it indicates that the first content channel includes the specified subchannel.As another example, if the location indication information is 01, it indicates that the first content channel includes all odd-numbered subchannels; if the location indication information is 10, it indicates that the first content channel includes all even-numbered subchannels; and if the location indication information is 11, it indicates that the first content channel includes the specified subchannel. Scenario 2: The number of bits in the location indication information is 3 bits. In this case, the location indication information can specify that the first content channel includes either the odd-numbered subchannel or the even-numbered subchannel. Specifically, the location indication information can specify any of the odd-numbered subchannels or any subchannel within the even-numbered subchannels. For example, the first content channel includes any of the odd-numbered subchannels ID 3, ID 5, ID 7, ID 9, ID 11, ID 13, or ID 15. For instance, if the location indication information is 001, it indicates that the first content channel includes the subchannel corresponding to ID 3; if the location indication information is 010, it indicates that the first content channel includes the subchannel corresponding to ID 5; or if the location indication information is 111, it indicates that the first content channel includes the subchannel corresponding to ID 15.As another example, the first content channel includes any of the even-numbered subchannels ID 2 / ID 4 / ID 6 / ID 8 / ID 10 / ID 12 / ID 14 / ID 16. If the location indication information is 000, it indicates that the first content channel includes the subchannel corresponding to ID 2; or if the location indication information is 111, it indicates that the first content channel includes the subchannel corresponding to ID 16. Scenario 3: The number of bits in the location indication information is 4 bits. In this case, the location indication information can indicate any of the subchannels corresponding to ID 1 to ID 16. For example, if the location indication information is 0001, it indicates that the first content channel includes the subchannel corresponding to ID 2; or if the location indication information is 1111, it indicates that the first content channel includes the subchannel corresponding to ID 16. Scenario 4: The number of bits in the location indication information is 6 bits. In this case, the location indication information can not only indicate the frequency domain location of the first content channel, but can also ML / í UO J4 indicates mode information corresponding to the frequency domain location. Mode information corresponding to the frequency domain location can be understood as location classification information for the first content channel. Location indication information includes mode indication information and corresponding indication information. Mode indication information indicates different modes, and corresponding indication information indicates a specific frequency domain location within a mode indicated by the mode indication information. Optionally, the mode information can include three modes. For example, a first mode could be that the first content channel includes the odd-numbered subchannel, a second mode could be that the first content channel includes the even-numbered subchannel, and a third mode could be that the first content channel includes the specified subchannel.For example, as shown in FIGURE 11, the mode indication information is 2 bits long, and the corresponding indication information is 4 bits long. For example, if the mode indication information is 00, the corresponding indication information can indicate any of the subchannels corresponding to ID 1 through ID 16. For another example, if the mode indication information is 01, the corresponding indication information can indicate any of the odd-numbered subchannels. For yet another example, if the mode indication information is 10, the corresponding indication information can indicate any of the even-numbered subchannels.As another example, if the mode indication information is 11, the corresponding indication information may indicate a value in a mapping set, and the mapping set includes a correspondence between the frequency domain location of the first content channel and the value. When the mode indication information is 11, optionally, as shown in Table 3, when a decimal value corresponding to a corresponding indication information value is 0, it can indicate that the PPDU bandwidth is 20 MHz. When the decimal value corresponding to the corresponding indication information value is 1, it can indicate that the frequency domain location of the first content channel is in a subchannel corresponding to a secondary bandwidth of 20 MHz, and the PPDU bandwidth is 40 MHz. When the decimal value corresponding to the corresponding indication information value is 3, it can indicate that the frequency domain location of the first content channel is in a second subchannel corresponding to a secondary bandwidth of 40 MHz, and the PPDU bandwidth is 80 MHz.R20 can also be understood as 20_2, meaning in the second subchannel corresponding to the 40 MHz bandwidth. When the decimal value corresponding to the corresponding indication information value is 6, it may indicate the location of. ML / t / ZUZZ / U í UO J4 frequency domain of the first content channel is in a subchannel corresponding to a second bandwidth of 20 MHz corresponding to a secondary bandwidth of 80 MHz. It can be understood that, in Table 3, when an index is 1, the preamble punch information may not be included, or the information sent in the subchannel corresponding to the secondary bandwidth of 20 MHz may be the same as the information (e.g., completely duplicated) sent in a subchannel corresponding to a primary bandwidth of 20 MHz (20 MHz primary). ML / í UO J4 Table 3 index (Index) Definition Bandwidth 0 — 20 MHz 1 2 (S20) 40 MHz 2 2 (S20) 80 MHz 3 4 (S40-R20) 80 MHz 4 2 (S20) 160 MHz 5 4 (S40-R20) 160 MHz 6 6(S80-20_2) 160 MHz 7 8 (S80-20 4) 160 MHz 8 2 (S20) 320 MHz 9 4 (S40-R20) 320 MHz 10 6(S80-20 2) 320 MHz 11 8(S80-20 4) 320 MHz 12 10(S160-20 2) 320MHz 13 12 (S160-20 4) 320 MHz 14 14 (S160-20 6) 320 MHz 15 16 (S160-20_8) 320 MHz Optionally, the definitions of indices 9 to 16 in Table 3 may be replaced with those in Table 4. Table 4 8 2 (S20) 240 MHz 9 4 (S40-R20) 240 MHz 10 6(S80-20 2) 240 MHz 11 8(S80-20 4) 240 MHz 12 2 (S20) 320 MHz 13 4 (S40-R20) 320 MHz 14 6(S80-20 2) 320MHz 15 8(S80-20 4) 320MHz When the mode indication information is 11, as shown in Table 5, it can optionally indicate that a subchannel is not punched, x can indicate that the subchannel is punched, indicates that there is no channel, and ? indicates that a punched subchannel status is unaffected. For example, when the decimal value corresponding to the corresponding indication information value is 0, it indicates that the PPDU bandwidth is 20 MHz, and all PPDU subchannels are not punched. When the decimal value corresponding to the corresponding indication information value is 4, it indicates that the PPDU bandwidth is 160 MHz, the subchannel corresponding to the 20 MHz secondary bandwidth is punched, and it does not indicate whether the subchannel corresponding to the 80 MHz secondary bandwidth is punched. Table 5 ML / t / ZUZZ / U í UO J4 Index Primary bandwidth of 80 MHz Secondary bandwidth of 80 MHz Bandwidth 0 — 20 MHz 1 — 40 MHz 2 X 7 — 80 MHz 3 7 7 — 80 MHz 4 X 7 d 7 160 MHz 5 d 7 7 7 160 MHz 6 X 7 d 7 7 160 MHz 7 d 7 7 7 7 160 MHz 8 X 7 d 7 240 MHz 9 7 7 7 240 MHz 10 X 7 d 7 7 320 MHz 11 d 7 7 7 7 d 320 MHz 12 X 7 d 7 7 320 MHz 13 y / 7 7 y / d 7 7 320 MHz 14 X 7 y / y / 7 7 d 320 MHz 15 7 7 d 7 7 320 MHz It can be understood that a specific number of bits for the location indication information is not limited in this mode of this application. For example, the specific number of bits for the location indication information could be 8 bits or 7 bits. More bits indicate more modes. Implementing this method for this application not only makes the way of indicating location information in this application more flexible, but also maintains compatibility to some extent. Optionally, in Scenario 2, Scenario 3, and Scenario 4, the location indication information can specify the frequency domain location of the first content channel and can also specify a PPDU bandwidth value. Specifically, the first content channel includes a subchannel corresponding to a maximum secondary bandwidth within the PPDU bandwidth. For example, if the location indication information indicates that the first content channel is in a subchannel (ID 3 and / or ID 4) corresponding to a secondary bandwidth of 40 MHz, the PPDU bandwidth is 80 MHz. As another example, if the first content channel indicated by the location indication information is in subchannels (i.e., subchannels corresponding to ID 5 through ID 8) corresponding to a secondary bandwidth of 80 MHz, the PPDU bandwidth is 160 MHz.As another example, if the first content channel indicated by the location indication information is in subchannels (the subchannels correspond to ID 9 to ID 16) corresponding to a secondary bandwidth of 160 MHz, the PPDU bandwidth is 320 MHz. Optionally, the PPDU bandwidth can be 240 MHz. Therefore, to distinguish whether the PPDU bandwidth is 240 MHz or 160 MHz, in this modality of this application, a maximum secondary bandwidth of the 160 MHz bandwidth is defined as a bandwidth of 80 MHz, and a maximum secondary bandwidth of the 240 MHz bandwidth is defined as a third bandwidth of 80 MHz. Optionally, if the first content channel includes a subchannel corresponding to a second secondary bandwidth of 80 MHz, the PPDU bandwidth is 160 MHz. If the first content channel includes a subchannel corresponding to a third secondary bandwidth of 80 MHz, the PPDU bandwidth is 240 MHz. A first secondary bandwidth of 80 MHz can be understood as a first bandwidth of 80 MHz within which the primary bandwidth of 20 MHz is located. Optionally, in addition to the methods described above for indicating the PPDU bandwidth, the PPDU bandwidth can be indicated by adding a bandwidth subfield to the universal signaling field. For example, the reserved subfield in Figure 6A is replaced with the bandwidth subfield. As another example, if the location indication information is 3 bits, the reserved subfield in Figure 6A is replaced with the bandwidth subfield, and the bandwidth subfield is 3 bits. The bandwidth subfield can indicate that the PPDU bandwidth is any of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, 240 MHz, or 320 MHz. The bandwidth subfield is added to the universal signaling field so that the receiving device can learn the PPDU bandwidth in advance.This makes it easier for the receiving device to configure a frequency band resource. It can be understood that the first content channel may also include a subchannel with good channel condition. For example, the transmission device may select a subchannel with good channel condition from among subchannels corresponding to a maximum secondary bandwidth, to send the preamble punch information. In this form of the request, the frequency domain location of the first content channel is indicated by adding a few bits to the location indication information. Therefore, the receiving device can receive the punch-in information. ML / t / ZUZZ / U í UO J4 of preamble in the first content channel. Figure 12 is a schematic diagram of preamble punching information when the preamble punching mode in a PPDU MU is 7. When the preamble punching mode is 7, it can indicate that the PPDU bandwidth is 160 / 80 MHz + 80 MHz. One form of channel punching is that any or all subchannels corresponding to the 40 MHz secondary bandwidth (secondary 40, S40) are punched. In the previous solution, the method for indicating preamble puncture information is inflexible. For example, the transmitting device cannot indicate to the receiving device a puncture status for a subchannel corresponding to a secondary bandwidth of 80 MHz; or the transmitting device cannot indicate to the receiving device both a puncture status for a subchannel corresponding to a secondary bandwidth of 40 MHz and a puncture status for a subchannel corresponding to a secondary bandwidth of 80 MHz. Therefore, this form of this request also provides preamble drilling information that can more flexibly indicate a drilling status of a channel. In this form of this request, a field containing the preamble drilling information is referred to as the first field, and a time-frequency resource used by the U-GIS is reused by the first field; or a time-frequency resource used by the GIS is reused by the first field, where n is a positive integer, for example, n = 1, 2, 3, or 4. In the following, a field containing the preamble drilling information is referred to as the first field. In one possible implementation, the preamble punching information can include a bitmap indicating whether a subchannel is punched. This bitmap indication can comprehensively describe the states indicating whether all subchannels are busy, while the punching status of the channel is indicated more flexibly. For example, when the PPDU bandwidth is 320 MHz and the subchannel bandwidth is 20 MHz, the preamble punching information might consist of 16 bits. For instance, 1 indicates that the subchannel is punched, and 0 indicates that it is not. For example, if the preamble punch information is 0000 0000 0001 1110, the receiving device receives the preamble punch information and can determine that the subchannels corresponding to ID 2 through ID 5 are punched. Optionally, 0 can indicate that the subchannel is punched, and 1 can indicate that the subchannel is not punched. Optionally, the number of bits in the preamble punch information can be 14 bits, and these 14 bits can indicate a punch state for a subchannel other than the subchannel corresponding to ID 1 and the subchannel occupied by the preamble punch information. For example, if the subchannel occupied by the preamble punch information is the subchannel corresponding to ID 16, the 14 bits can indicate punch states for the subchannels corresponding to ID 2 through ID 15. It can be understood that when the PPDU bandwidth is 40 MHz, the transmitting device does not need to send the preamble punch information and it also does not need to send the location indication information. It can be understood that, in addition to indicating the drilling statuses of the subchannels in a sequence of subchannel numbers, the preamble drilling information can indicate the drilling statuses of the subchannels in another agreed-upon sequencing. If the subchannels corresponding to ID 2 through ID 5 are drilled, the preamble drilling information could alternatively be 0111 1000 0000 0000. Figure 13 is a schematic diagram of a first field format according to one modality of this application. The field may include 14 or 16 bits of preamble punch information. Optionally, the field may also include a reserved subfield, a CRC subfield, and a tail bit subfield. It can be understood that, in addition to the preamble punch information, the information carried in the first field shown in Figure 13 may also include other information, for example, resource unit combination information. Preamble punch information can be understood as indicated in the manner shown in Figure 13, and it can also indicate the bandwidth of a PPDU. For example, a subchannel punch state is indicated by using 1111 1111 1111 1000. When preamble punch information is received, a receiving device can further learn that the PPDU bandwidth is 320 MHz. The preamble punching information shown above is understood to be displayed using a bandwidth granularity of 20 MHz as an example. In a specific implementation, a bandwidth granularity of 10 MHz, 40 MHz, 80 MHz, or similar could be used alternatively. Consequently, a subchannel bandwidth could also be 10 MHz, 40 MHz, or similar. In one possible implementation, preamble punching information can be indicated in a mode + bandwidth manner. As shown in Figure 13, in mode + bandwidth mode, the preamble punching information can indicate different bandwidths, or it can indicate a preamble punching mode. For example, when the preamble punch information is 0000 0000 0000 0000 (0 in decimal notation), it may indicate that the PPDU bandwidth is 20 MHz. When the preamble punch information is 0000 0000 0000 0010 (1 in decimal notation), it may indicate that the PPDU bandwidth is 40 MHz. When the preamble punch information ranges from 0000 0000 0000 0011 to 0000 0000 0000 0100, it can indicate that the PPDU bandwidth is 80 MHz and that a preamble punch state is present for a subchannel corresponding to that 80 MHz bandwidth. This can be understood to mean that there may be six corresponding indices, corresponding to 3 through 8 in decimal notation. The preamble punch information does not include a case where a subchannel corresponding to a primary bandwidth of 20 MHz is punched. Furthermore, it does not include a case where two subchannels corresponding to a secondary bandwidth of 40 MHz are punched. The rest can be deduced by analogy. The preamble punch information can indicate a bandwidth of 160 MHz and specify punch states for eight subchannels corresponding to a first bandwidth of 80 MHz and a second bandwidth of 80 MHz. In this case, the preamble punch information can include 125 (2*2*2*2*2*2*2-3) index values. Optionally, when the PPDU bandwidth is 160 MHz, the preamble punch information can alternatively include only one punch state for a subchannel corresponding to the first bandwidth of 80 MHz. In addition, the preamble punching information may also indicate that the PPDU bandwidth is 240 MHz and indicate the punching status of the subchannel corresponding to the first bandwidth of 80 MHz. Additionally, the preamble punch information may also indicate that the PPDU bandwidth is 320 MHz, and indicate the punch status of the subchannel corresponding to the first 80 MHz bandwidth. Optionally, the preamble punch information may also indicate that the PPDU bandwidth is 320 MHz, and indicate punch states of subchannels corresponding to the first 80 MHz bandwidth and the second 80 MHz bandwidth. Optionally, the preamble punch information may also indicate that the PPDU bandwidth is 320 MHz, and indicate punch states of subchannels corresponding to the first 80 MHz bandwidth and a third 80 MHz bandwidth. Optionally, the preamble punch information may also indicate that the PPDU bandwidth is 320 MHz, and indicate punch states of subchannels corresponding to the first bandwidth of ΜΛ / t / ZUZZ / U í UO J4 80 MHz band and a quarter 80 MHz bandwidth. In addition to the method shown in Figure 13, there may be another way to indicate preamble punch information. For example, a 14-bit preamble punch indication can be compressed for robustness or to carry other information. For example, an indication granularity of 80 MHz might be used for some bandwidths. For instance, an 80 MHz bandwidth containing a primary 20 MHz bandwidth would be indicated with a granularity of 20 MHz, and subsequent 80 MHz bandwidths would be indicated with granularities of three 80 MHz bandwidths. Three bits could indicate the three 80 MHz bandwidths. If the preamble punching information is carried out in a SIG1 field, the bit length of the SIG1 field increases, as do the signaling overheads. In contrast, carrying the preamble punching information in the SIG field, the technical solution in this application not only allows for more flexible indication of a subchannel punching status but also reduces signaling overheads by carrying 16-bit or 14-bit preamble punching information in the first field. It can be understood that the above description of the first content channel and the preamble drilling information is applicable to all of the following modalities. Finally, a specific modality to which the modalities of this application apply is described later using an example with reference to the preamble punching information and the first content channel. All the following modalities and accompanying drawings are shown using an example where a PPDU bandwidth is 320 MHz and a subchannel bandwidth is 20 MHz. Mode 1 Figure 14 is a schematic diagram of the formats of some fields in a SU PPDU according to one modality of this request. A first content channel includes all even-numbered subchannels and does not include a punched even-numbered subchannel. A first field in which the preamble punch information is located can reuse a time-frequency resource used by a SIG1 field. As shown in Figure 14, an even-numbered subchannel occupied by the first field can be used to send the preamble punch information. It can be understood that the content of specific information carried in an odd-numbered subchannel is not limited in this modality of this request. Mode 2 Figure 15 is a schematic diagram of the formats of some fields in a MU PPDU according to one modality of this application. As shown in Figure 15, a The SIG1 field of the MU PPDU includes a SIG1-A subfield and a SIG1-B subfield. A first content channel includes all even-numbered subchannels and does not include a punched even-numbered subchannel. A first field in which preamble punch information is located can reuse a time-frequency resource originally used by the SIG1-A subfield. As shown in FIGURE 15, an even-numbered subchannel occupied by the first field can be used to send the preamble punch information. Optionally, the first field can include a CRC subfield and a tail bit subfield. Alternatively, the first field can not include the CRC subfield and the tail bit subfield. It can be understood that part or all of the SIG1-A subfield can be reused by the first field. This is not limited in this application form. Mode 3 Figure 16 is a schematic diagram of the formats of some fields in a PPDU according to one modality of this request. As shown in Figure 16, the location indication information is located in the first symbol of a U-SIG field. The location indication information indicates that a first content channel includes a subchannel corresponding to ID 16. It is previously specified that the preamble punch information is located in the second symbol of the U-SIG field. In this case, the second symbol of the U-SIG field is reused as a first field in which the preamble punch information is located, and the subchannel corresponding to ID 16 occupied by the second symbol of the U-SIG field can be used to send the preamble punch information. It can be understood that a universal field format in mode 3 can be shown separately in FIGURE 6A and FIGURE 7A. A CRC subfield and a tail bit subfield are added to the first symbol of the universal field, so that a receiving device can obtain the preamble punch information by analyzing the first symbol. Mode 4 Figure 17 is a schematic diagram of the formats of some fields in a PPDU according to one modality of this request. As shown in Figure 17, the location indication information is placed in a U-SIG field, and a time-frequency resource originally used by a SIG1 field is reused as the first field in which the preamble drilling information is placed. Furthermore, it can be pre-specified that the preamble drilling information is placed in a field after the U-SIG field. It can be understood that a universal field format in modality 4 can be ML / t / ZUZZ / U í UO J4 show separately in FIGURE 6B and FIGURE 7B. If the location indication information is specifically located in a first or second symbol of the U-SIG field, it is not limited in this modality of this application. Modality 5 Figure 18A and Figure 18B are schematic diagrams of the formats of some fields in a PPDU according to one modality of this request. In this modality, it can be pre-specified that the preamble drilling information is located in a first field and a second field after a U-SIG field. As shown in Figure 18A, a first content channel and a second content channel can be distinguished in a SIG1 field and a SIG2 field in Figure 18A. For example, a subchannel corresponding to ID 16 can be the first content channel, and the subchannels corresponding to IDs 1 through 15 can be the second content channel. As shown in Figure 18B, the location indication information can specify that a frequency domain location of the first content channel is the subchannel corresponding to ID 15 and / or ID 16. For example, the location indication information can specify that the first content channel includes the subchannel corresponding to ID 15, and it can be pre-specified that the preamble punch information is located in the same two fields. In this case, the preamble punch information can be located in the first field shown in Figure 18B. Modality 6 Figure 19 is a schematic diagram of the formats of some fields in a PPDU according to one modality of this request. This modality of this request can be applied to a requirement that a receiving device supports operation only in certain bandwidths. For example, the receiving device supports receiving preamble punch information only in S20 and / or S40. If the receiving device supports reading preamble punch information only on S20 and S40, there are two possible scenarios. One is that channels are available on S20 and S40, and the other is that no channels are available on S20 and S40. If channels are available on S20 and S40, for example, if S20 and / or S40 are not punched, the location indication information may indicate subchannels corresponding to ID 2 through ID 4. As shown in FIGURE 20, for example, a corresponding indication can be four bits, where yyz can be two bits each, and can indicate four bandwidths: 40 MHz, 80 MHz, 160 MHz and 320 MHz, yz can indicate three channels: ID 2, ID 3 and ID 4 (when channels are available in S20 and S40). Modality 7 FIGURE 21 is a schematic diagram of the formats of some fields of a ML / t / ZUZZ / U í UO J4 PPDU according to one modality of this application. In this modality of this application, the preamble punch information may be located in more fields. As shown in FIGURE 21, a first content channel indicated by the location indication information is located in a subchannel corresponding to ID 16, and the preamble punch information is located in a first field. Furthermore, the first field may also include the location indication information in addition to the preamble punch information. The location indication information may indicate a subchannel corresponding to ID 3, and the preamble punch information is located in the first field carried in the subchannel corresponding to ID 3. For another example, the indication is made using learned preamble punch information and other information. For example, if it is known that four channels of a first bandwidth of 80 MHz are in use, a transmitting device can reuse subchannels corresponding to ID 2, ID 3, and ID 4, and send the preamble punch information using the subchannels corresponding to ID 2, ID 3, and ID 4. It can be understood that, in the previous modalities, although the bit length of the first field drawn in the attached drawing is the same as the bit length of the second symbol in the SIG1 field (or the SIG2 field) or the U-SIG field, the bit length of the first field is not limited in the modalities of this application. For example, the bit length of the first field may alternatively be less than the bit length of the SIG1 field. As another example, the bit length of the first field may alternatively be less than the bit length of the second symbol in the U-SIG field. In other words, for example, part or all of the SIG1 field may be reused by the first field. It can be understood that the first field may include information other than the preamble drilling information. For example, this other information may include information carried in an HE-SIG-A field and / or an HE-SIG-B field in 802.11ax. It can be understood that if a perforated subchannel belongs to the second content channel, it is not limited in the modalities of this request. It can be understood that, in the above modalities, for the specific forms of indication of preamble drilling information and location indication information, reference is made to the above description. The above describes the modalities of this application in detail. The following describes a communication device in this application. As shown in FIGURE 22, the communication apparatus includes a processing unit 2201 and a sending unit 2202. The 2201 processing unit is configured to generate a physical layer protocol data unit (PHY protocol data unit, PPDU) that includes a preamble, where the ML / í UO J4 preamble includes preamble puncturing information. The 2202 sending unit is configured to send preamble punch information on a first content channel, where the total bandwidth of the first content channel is less than the bandwidth of the PPDU. The communication apparatus in this modality of this application has any function of the transmission device in the previous method. Details are not described again herein. FIGURE 22 is reused. In another embodiment, a communication apparatus includes the transceiver unit 2202 and the processing unit 2201. The 2202 transceiver unit is configured to receive preamble puncturing information on a first content channel, where the preamble puncturing information is included in a preamble of a physical layer protocol data unit (PHY protocol data unit, PPDU), and a total bandwidth of the first content channel is less than a bandwidth of the PPDU. Processing unit 2201 is configured to determine a PPDU channel usage status based on preamble drilling information. The communication device in this modality of this application has any function of the receiving device in the previous method. Details are not described again herein. The foregoing describes the transmitting device and the receiving device in the forms covered by this application. The following describes possible product forms of the transmitting device and the receiving device. It is understood that any product form having a function of the transmitting device in FIGURE 22 and any product form having a function of the receiving device in FIGURE 22 falls within the scope of protection of the forms covered by this application. It is further understood that the following description is merely an example, and the product forms of the transmitting device and the receiving device in the forms covered by this application are not limited to them. In one possible product form, the transmitting device and the receiving device in the modalities of this application can be implemented using a general bus architecture. The transmission device includes a processor and a transceiver that is internally connected and communicates with the processor. The processor is configured to generate a PPDU that includes a preamble containing preamble punch information. The transceiver is configured to send the preamble punch information on a first content channel. Additionally, the transceiver is configured to send the PPDU. ML / t / ZUZZ / U / UO J4 Optionally, the transmission device may also include a memory, and the memory is configured to store instructions executed by the processor. The receiving device includes a processor and a transceiver that is internally connected to and communicates with the processor. The transceiver is configured to receive preamble punch information in the first content channel, where the preamble punch information is included in the PPDU preamble. The processor is configured to determine the usage status of a PPDU channel based on the preamble punch information. Optionally, the receiving device may also include memory, and the memory is configured to store instructions executed by the processor. In one possible product form, the transmitting device and the receiving device in the modalities of this application can be implemented using a general-purpose processor. A general-purpose processor implementing the transmission device includes a processing circuit and an output interface that is internally connected to and communicates with the processing circuit. The processing circuit is configured to generate a PPDU (Preamble Punched Document Unit) that includes a preamble containing preamble punch information. The output interface is configured to send the preamble punch information. Additionally, the output interface is configured to send the PPDU. Optionally, the general-purpose processor may also include a storage medium configured to store instructions executed by the processing circuit. A general-purpose processor implementing the receiving device includes a processing circuit and an input interface that is internally connected to and communicates with the processing circuit. The input interface is configured to receive a PPDU, where the PPDU includes a preamble, and the preamble includes preamble punch information. The processing circuit is configured to determine the usage status of a PPDU channel based on the preamble punch information. Optionally, the general-purpose processor may also include a storage medium, where the storage medium is configured to store instructions executed by the processing circuit. In one possible product form, the transmitting device and the receiving device in the modalities of this application may be further implemented by using one or more FPGAs (field programmable gate arrays), a PLD (programmable logic device), a controller, a state machine, gate logic, a discrete hardware component, any other suitable circuit, or any combination of circuits that can perform various functions described in this application. ML / í UO J4 It should be understood that the transmitting devices in the above product forms have all the functions of the transmitting device in the previous method. Details are not described again herein. The receiving devices in the above product forms have all the functions of the receiving device in the previous method. Details are not described again herein. It should be understood that the term "and / or" in this specification describes only an association relationship between associated objects and indicates that three relationships are possible. For example, "A and / or B" can indicate the following three cases: Only A exists, both A and B exist, and only B exists. Furthermore, the character "7" in this specification generally indicates an "or" relationship between associated objects. A person skilled in the art may be aware that, in combination with the examples described in the modalities disclosed in this specification, the method steps and units can be implemented using electronic hardware, computer software, or a combination thereof. To clearly describe the interchangeability between hardware and software, the above has generally described steps and components of each modality according to functions. Whether the functions are performed by hardware or software depends on the particular applications and the design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it is not necessary to consider that the implementation goes beyond the scope of this specification. A person skilled in the art will readily understand that, for the purpose of a convenient and concise description, a detailed working process for the system, apparatus, and unit described above is referenced to a corresponding process in the previous method. No further details are described herein. In the various modalities provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the described device modalities are merely examples. For instance, the division into units is simply a division of logical functions and may be another division in an actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not realized. Furthermore, the mutual couplings, direct couplings, or communication connections shown or discussed may be implemented through various interfaces. Indirect couplings or communication connections between devices or units may be implemented electrically, mechanically, or otherwise. The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units. ML / UO J4 can be located in one position, or they can be distributed across a plurality of network units. Some or all of the units can be selected based on an actual requirement to achieve the objectives of the modality solutions. Furthermore, the functional units of this application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware form, or it can be implemented as a software functional unit. When the embedded unit is implemented as a functional software unit and sold or used as a standalone product, the embedded unit can be stored on a computer-readable storage medium. Based on this understanding, the technical solutions in the modalities of this application, essentially, or the contributing part thereof, can be implemented in the form of a software product. The computer software product is stored on a storage medium and includes various instructions to instruct a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or some of the steps of the methods described in the modalities of this application.The above storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk. Furthermore, this application also provides a computer program. The computer program is used to perform an operation and / or processing carried out by the transmission device in the drilling information indication method provided in this application. This application also provides a computer program. The computer program is used to perform an operation and / or processing carried out by the receiving device in the drilling information indication method provided in this application. This application also provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer is activated to perform an operation and / or processing carried out by the transmitting device in the punch information indication method provided in this application. ML / í UO J4 This application also provides a computer-readable storage medium. The computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer is activated to perform an operation and / or processing carried out by the receiving device in the punch information indication method provided in this application. This application also provides a computer program product. The computer program product includes computer code or instructions. When the computer code or instructions are executed on a computer, the punching information indication method is implemented in the method mode of this application. This application also provides a computer program product. The computer program product includes computer code or instructions. When the computer code or instructions are executed on a computer, the punching information indication method is implemented in the method mode of this application. This application also provides a wireless communication system, which includes the transmitting device and the receiving device in the modalities of this application. The foregoing description is merely a specific implementation of this application; however, it is not intended to limit the scope of protection of this application. Any variation or replacement readily visualized by a person skilled in the art within the technical scope disclosed in this application should fall within the scope of protection of this application. Therefore, the scope of protection of this application should be subject to the scope of protection of the claims.

Claims

1. A method for indicating drilling information, characterized in that the method comprises: generating a physical layer protocol data unit, PPDU, comprising a preamble, wherein the preamble comprises a universal GIS field, U-GIS, the universal field comprises mode indication information and corresponding indication information, the mode indication information indicating different modes, and the corresponding indication information indicating the drilling status of the preamble corresponding to a mode indicated by the mode indication information; and sending the PPDU.

2. A method for indicating drill information, characterized in that the method comprises: receiving a physical layer protocol data unit, PPDU, comprising a preamble, wherein the preamble comprises a universal SIG field, U-SIG, the universal field comprises mode indication information and corresponding indication information, the mode indication information indicating different modes, and the corresponding indication information indicating the drill status of the preamble corresponding to a mode indicated by the mode indication information; and determining the drill status of the preamble, based on the mode indication information and the corresponding indication information.

3. The method according to claim 1 or 2, characterized in that the mode indication information indicates a mode, the corresponding indication information being a bit map indicating the preamble punch state corresponding to the mode.

4. The method according to claim 3, characterized in that the bitmap indicates the preamble punch state of an 80 MHz subchannel.

5. The method according to any of claims 1 to 4, characterized in that the mode indication information indicates a mode, the corresponding indication information being an index indicating the preamble drilling status corresponding to the mode.

6. The method according to any of claims 1 to 5, characterized in that the U-SIG field further comprises a bandwidth subfield, and the bandwidth subfield indicates that a PPDU bandwidth is any of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz. ML / í UO J4 7. The method according to any of claims 1 to 6, characterized in that the mode indication information and the corresponding indication information are located in the same subfield in the U-SIG field; or the mode indication information and the corresponding indication information are located in different subfields in the U-SIG field.

8. A drilling information indication apparatus, characterized in that the apparatus comprises: a generating unit, configured to generate a physical layer protocol data unit, PPDU, comprising a preamble, wherein the preamble comprises a universal SIG field, U-SIG, the universal field comprises mode indication information and corresponding indication information, the mode indication information indicating different modes, and the corresponding indication information indicating the drilling status of the preamble corresponding to a mode indicated by the mode indication information; and a sending unit, configured to send the PPDU.

9. A drilling information indicating apparatus, characterized in that the apparatus comprises: a receiving unit, configured to receive a physical layer protocol data unit, PPDU, comprising a preamble, wherein the preamble comprises a universal SIG field, U-SIG, the universal field comprises mode indication information and corresponding indication information, the mode indication information indicating different modes, and the corresponding indication information indicating the preamble drilling status corresponding to a mode indicated by the mode indication information; and a processing unit, configured to determine the preamble drilling status, based on the mode indication information and the corresponding indication information.

10. The apparatus according to claim 8 or 9, characterized in that the mode indication information indicates a mode, the corresponding indication information being a bit map indicating the preamble punch state corresponding to the mode.

11. The apparatus according to claim 10, characterized in that the bitmap indicates the preamble punch state of an 80 MHz subchannel.

12. The apparatus according to any of claims 8 to 11, characterized in that the mode indication information indicates a mode, the corresponding indication information being an index indicating the preamble piercing state corresponding to the mode.

13. The apparatus according to any of claims 8 to 12, characterized in that the U-SIG field further comprises a bandwidth subfield, and the bandwidth subfield indicates that a PPDU bandwidth is any of the following: 20 MHz, 40 MHz, 80 MHz, 160 MHz or 320 MHz.

14. The apparatus according to any of claims 8 to 13, characterized in that the mode indication information and the corresponding indication information are located in the same subfield in the U-SIG field; or the mode indication information and the corresponding indication information are located in different subfields in the U-SIG field.

15. A computer-readable storage medium, characterized in that the computer-readable storage medium is configured to store a computer program used to perform the method according to any one of claims 1 to 7.

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