A signaling field indication method and apparatus

Abstract

A signaling field indication method and apparatus are disclosed to enable SIG-A to transmit more information bits. The method includes: a transmitter generating a PPDU (Programmable Message Distributor Unit), the PPDU including a SIG-A indication field, wherein the SIG-A indication field includes at least one of a field indicating the number of information symbols for SIG-A and a field indicating the information bandwidth of SIG-A; and the transmitter transmitting the PPDU. Using the method provided in this application, the transmitter can indicate different numbers of SIG-A information symbols and / or different SIG-A information bandwidths.

Description

Technical Field

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

[0002] Wireless local area networks (WLANs) have evolved from 802.11a / b / g through 802.11n, 802.11ac, and 802.11ax. In each standard, the physical protocol data unit (PPDU), or data packet for short, is structured into two parts: a preamble field and a data field.

[0003] In the preamble field, the information transmitted by the high throughput signaling field (HT SIG), very high throughput (VHT)-SIG-A, and high efficient (HE)-SIG-A in existing standards each occupies two symbols. In terms of frequency, HT-SIG, VHT-SIG-A, and HE-SIG-A all use 20MHz as the basic information unit, with each 20MHz coded independently. If the PPDU bandwidth exceeds 20MHz, the information is copied across several 20MHz MHz segments. However, next-generation standards may introduce larger bandwidths (320MHz), more streams (16 streams), multi-band operation, access point (AP) cooperation, and other mechanisms, requiring SIG-A to transmit more information bits. Therefore, the existing designs for SIG-A in various standards are insufficient to meet future needs, and a new SIG-A indication scheme is urgently required. Summary of the Invention

[0004] This application provides a signaling field indication method and apparatus for implementing parameters indicating SIG-A.

[0005] In a first aspect, embodiments of this application provide a signaling field indication method, the method comprising: a transmitting end generating a PPDU; the PPDU including a SIG-A indication field, wherein the SIG-A indication field includes at least one of a field for indicating the number of information symbols for SIG-A and a field for indicating the information bandwidth for SIG-A; and the transmitting end transmitting the PPDU.

[0006] Therefore, using the method provided in this application, the sending end can indicate different numbers of SIG-A information symbols and / or different SIG-A information bandwidths.

[0007] In one possible design, the field used to indicate the number of information symbols in SIG-A is the length field included in L-SIG of the PPDU.

[0008] Therefore, the length field included in L-SIG can be used to indicate the number of information symbols for different SIG-A symbols. Furthermore, indicating the number of information symbols for SIG-A through the length field in L-SIG allows the receiver to obtain the number of information symbols for SIG-A as early as possible.

[0009] In one possible design, the field used to indicate the number of information symbols for SIG-A is the signature symbol field in the PPDU, which includes a field indicating the number of information symbols for SIG-A and / or a field indicating the MCS for SIG-A. Each MCS for SIG-A corresponds to one number of information symbols for SIG-A.

[0010] Therefore, by utilizing the fields in the signature symbol field that indicate the number of information symbols for SIG-A and / or the MCS field that indicates SIG-A, different numbers of SIG-A information symbols can be indicated, allowing the receiving end to obtain the number of SIG-A information symbols before SIG-A. Specifically, the MCS field that indicates SIG-A can indirectly indicate the number of SIG-A information symbols.

[0011] In one possible design, the field used to indicate the number of information symbols in SIG-A is an additional symbol indicator field included in the first X1 symbols of SIG-A; wherein, the additional symbol indicator field indicates the difference ΔX between the number of information symbols in SIG-A and X1, and ΔX takes K values, with each of the K ΔX values ​​corresponding one-to-one with the number of information symbols in K types of SIG-A, wherein if ΔX = 0, the number of information symbols in SIG-A is X1, and if ΔX is a positive integer, the number of information symbols in SIG-A is X1 + ΔX, where X1 and K are both positive integers.

[0012] Therefore, the additional symbol indicator field included in the first X1 symbols of SIG-A can be used to indicate the number of information symbols for different SIG-A symbols, with little dependence on the symbol design prior to SIG-A.

[0013] In one possible design, when the number of information symbols in SIG-A is X1 + ΔX, the first X1 symbols in SIG-A include an additional symbol indicator field, a first CRC, and a first tail bit. The first CRC is used to verify whether the first X1 symbols are accurate, and the first tail bit is used by the receiver to end the decoding of the first X1 symbols. The remaining ΔX symbols in SIG-A include a second CRC and a second tail bit. The second CRC is used to verify whether the ΔX symbols are accurate, and the second tail bit is used by the receiver to end the decoding of SIG-A.

[0014] Therefore, the sender encodes SIG-A in two parts. The first X1 symbols in SIG-A include an extra symbol indicator field, a first CRC, and a first tail bit. The extra symbol indicator field can indicate the number of information symbols in different SIG-A. The remaining ΔX symbols in SIG-A include a second CRC and a second tail bit.

[0015] In one possible design, the field used to indicate the information bandwidth of SIG-A is the length field included in L-SIG of the PPDU.

[0016] Therefore, the length field included in L-SIG can be used to indicate different SIG-A information bandwidths.

[0017] In one possible design, the field used to indicate the information bandwidth of SIG-A is the signature symbol field in the PPDU that includes the field used to indicate the information bandwidth of SIG-A.

[0018] Therefore, using the field included in the signature symbol field to indicate the information bandwidth of SIG-A can indicate different SIG-A information bandwidths.

[0019] In one possible design, the information bandwidth of SIG-A is 20MHz or a first information bandwidth, wherein the first information bandwidth is a fixed information bandwidth or PPDU bandwidth greater than 20MHz.

[0020] Therefore, the information bandwidth of SIG-A can include a variety of possible designs.

[0021] In one possible design, the field used to indicate the information bandwidth of SIG-A is the signature symbol field in the PPDU that includes the field used to indicate the bandwidth mode; if the bandwidth mode indicated by the field used to indicate the bandwidth mode is breakdown bandwidth, then the information bandwidth of SIG-A is 20MHz, and if the bandwidth mode indicated by the field used to indicate the bandwidth mode is non-breakdown bandwidth, then the information bandwidth of SIG-A is the first information bandwidth.

[0022] Therefore, the field included in the signature symbol field to indicate the bandwidth mode can indicate different SIG-A information bandwidths.

[0023] In one possible design, when the information bandwidth of SIG-A is greater than 20MHz, the corresponding subcarriers of the guard interval between every two adjacent SIG-A within the information bandwidth of SIG-A include sequences for channel estimation.

[0024] Therefore, the receiver can obtain all the required channel information through the sequences used for channel estimation in L-LTF and SIG-A, and the transmitter can transmit information on all the corresponding subcarriers in SIG-B.

[0025] Secondly, embodiments of this application provide a signaling field indication method, the method comprising:

[0026] The receiving end receives a PPDU, which includes a SIG-A indication field. The SIG-A indication field includes at least one of a field for indicating the number of information symbols of SIG-A and a field for indicating the information bandwidth of SIG-A. The receiving end reads the SIG-A indication field to obtain at least one of the number of information symbols of SIG-A and the information bandwidth of SIG-A, and reads SIG-A based on at least one of the number of information symbols of SIG-A and the information bandwidth of SIG-A.

[0027] Therefore, using the method of this application, the receiving end can read the SIG-A indication field in the PPDU to obtain at least one of the number of SIG-A information symbols and the information bandwidth of SIG-A. The receiving end can read SIG-A based on different numbers of SIG-A information symbols and / or different information bandwidths of SIG-A indicated by the SIG-A indication field in the PPDU.

[0028] In one possible design, the field used to indicate the number of information symbols in SIG-A is the length field included in L-SIG of the PPDU.

[0029] In one possible design, the field used to indicate the number of information symbols for SIG-A is the signature symbol field in the PPDU, which includes a field indicating the number of information symbols for SIG-A and / or a field indicating the MCS for SIG-A. Each MCS for SIG-A corresponds to one number of information symbols for SIG-A.

[0030] In one possible design, the field used to indicate the number of information symbols in SIG-A is an additional symbol indicator field included in the first X1 symbols of SIG-A;

[0031] The additional symbol indicator field indicates the difference ΔX between the number of information symbols in SIG-A and X1. ΔX has K values, and each of the K ΔX values ​​corresponds one-to-one with the number of information symbols in K types of SIG-A. If ΔX = 0, the number of information symbols in SIG-A is X1. If ΔX is a positive integer, the number of information symbols in SIG-A is X1 + ΔX. Both X1 and K are positive integers.

[0032] In one possible design, when the number of information symbols in SIG-A is X1 + ΔX, the first X1 symbols in SIG-A include an additional symbol indicator field, a first CRC, and a first tail bit. The first CRC is used to verify whether the first X1 symbols are accurate, and the first tail bit is used by the receiver to end the decoding of the first X1 symbols. The remaining ΔX symbols in SIG-A include a second CRC and a second tail bit. The second CRC is used to verify whether the ΔX symbols are accurate, and the second tail bit is used by the receiver to end the decoding of SIG-A.

[0033] In one possible design, the field used to indicate the information bandwidth of SIG-A is the length field included in L-SIG of the PPDU.

[0034] In one possible design, the field used to indicate the information bandwidth of SIG-A is the signature symbol field in the PPDU that includes the field used to indicate the information bandwidth of SIG-A.

[0035] In one possible design, the information bandwidth of SIG-A is 20MHz or a first information bandwidth, wherein the first information bandwidth is a fixed information bandwidth or PPDU bandwidth greater than 20MHz.

[0036] Thirdly, embodiments of this application provide a signaling field indication device. This device includes a processing unit and a transmitting unit, and may further include a storage unit for storing instructions. The processing unit executes the instructions stored in the storage unit to cause the transmitting end to execute the method described in the first aspect or any possible design of the first aspect. This device can be a transmitting end or a transmitting end chip. When the device is a transmitting end, the processing unit can be a processor, and the transmitting unit can be a transceiver; if a storage unit is also included, the storage unit can be a memory. When the device is a transmitting end chip, the processing unit can be a processor, and the transmitting unit can be an input / output interface, pin, or circuit, etc. The processing unit executes the instructions stored in the storage unit to cause the transmitting end chip to execute the method described in the first aspect or any possible design of the first aspect; the storage unit can be an internal storage unit of the chip (e.g., a register, cache, etc.) or an external storage unit of the chip (e.g., a read-only memory, random access memory, etc.).

[0037] Fourthly, embodiments of this application provide a signaling field indication device. This device includes a processing unit and a receiving unit, and may further include a storage unit for storing instructions. The processing unit executes the instructions stored in the storage unit to cause the receiving end to execute the method described in the second aspect or any possible design of the second aspect. This device can be a receiving end or a receiving end chip. When the device is a receiving end, the processing unit can be a processor, and the receiving unit can be a transceiver; if a storage unit is also included, the storage unit can be a memory. When the device is a receiving end chip, the processing unit can be a processor, and the receiving unit can be an input / output interface, pin, or circuit, etc.; the processing unit executes the instructions stored in the storage unit to cause the receiving end chip to execute the method described in the second aspect or any possible design of the second aspect; the storage unit can be an internal storage unit of the chip (e.g., a register, cache, etc.) or an external storage unit of the chip (e.g., a read-only memory, random access memory, etc.).

[0038] Fifthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform any of the possible designs in the first aspect or any of the possible designs in the second aspect.

[0039] Sixthly, embodiments of this application also provide a computer program product containing a program, which, when run on a computer, causes the computer to execute any of the possible designs in the first aspect or any of the possible designs in the second aspect. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the Non-HT PPDU in the embodiments of this application;

[0041] Figure 2 This is a schematic diagram of the structure of the HT PPDU in the embodiments of this application;

[0042] Figure 3 This is a schematic diagram of the structure of the VHT PPDU in the embodiments of this application;

[0043] Figure 4 This is a schematic diagram of the HE PPDU structure in the embodiments of this application;

[0044] Figure 5 This is a schematic diagram illustrating an application scenario in the embodiments of this application;

[0045] Figure 6 This is a flowchart summarizing the signaling field indication method in the embodiments of this application;

[0046] Figure 7This is a schematic diagram of the structure of L-SIG in the embodiments of this application;

[0047] Figure 8 This is one of the structural schematic diagrams of a PPDU with a variable number of information symbols for EHT-SIG-A in the embodiments of this application;

[0048] Figure 9 This is the second schematic diagram of the structure of the PPDU with a variable number of information symbols in the EHT-SIG-A embodiment of this application;

[0049] Figure 10 This is the third schematic diagram of the structure of the PPDU with a variable number of information symbols in the EHT-SIG-A embodiment of this application;

[0050] Figure 11 This is a schematic diagram illustrating the gain effect of joint demodulation in the embodiments of this application;

[0051] Figure 12 This is one of the structural schematic diagrams of the EHT-SIG-A PPDU with variable information bandwidth in the embodiments of this application;

[0052] Figure 13 This is the second schematic diagram of the structure of the EHT-SIG-A PPDU with variable information bandwidth in the embodiments of this application;

[0053] Figure 14 This is the third schematic diagram of the structure of the EHT-SIG-A PPDU with variable information bandwidth in the embodiments of this application;

[0054] Figure 15 This is one of the structural schematic diagrams of the signaling field indication device in the embodiments of this application;

[0055] Figure 16 This is a second schematic diagram of the signaling field indication device in the embodiments of this application;

[0056] Figure 17 This is a schematic diagram of the structure of the signaling field indicating the device in the embodiments of this application. Detailed Implementation

[0057] The embodiments of this application will now be described with reference to the accompanying drawings.

[0058] First, let me briefly introduce the structure of the PPDU in each generation of standards.

[0059] 11a / b / g non-high throughput (Non-HT) PPDU consists of three preamble fields: short training field (STF), long training field (L-LTF), and SIG, and data. Figure 1 As shown. The signaling field indicates the rate of the data portion and the length of the data frame.

[0060] The 11n–HT PPDU differs from the 11a / b / g-Non-HT PPDU in that it adds Legacy (L-) before STF, LTF, and SIG to ensure coexistence with legacy devices. Additionally, it includes HT-SIG, HT-STF, and HT-LTF to assist in HT data transmission. Compared to the single-symbol L-SIG, HT-SIG contains two symbols, further carrying information such as PPDU bandwidth, modulation and coding scheme, and spatial stream number. Figure 2 As stated above.

[0061] The 11ac–VHT PPDU, compared to the two PPDUs mentioned above, includes VHT-SIG-A, VHT-STF, VHT-LTF, and VHT-SIG-B in addition to traditional signaling fields. VHT-SIG-A is similar to HT-SIG, used to indicate the signaling information required for the corresponding VHT function. VHT-SIG-B is mainly used for downlink multiple user-multiple input multiple output (DLMU-MIMO) functions, such as... Figure 3 As shown.

[0062] 11ax – High Efficient (HE) PPDU. HE PPDUs include four modes: HE single-user (SU) PPDU, HE multiple-user (MU) PPDU, HE extended-range (ER) SUPPDU, and HE trigger-based (TB) PPDU. In addition to the traditional preamble, they also include repetition of traditional signaling fields to enhance their reliability. Furthermore, an automatic detection method is provided for the receiver to identify an HE PPDU by checking if two symbols are identical. This PPDU also includes HE-SIG-A, HE-SIG-B, HE-STF, HE-LTF, and packet extension (PE). HE-SIG-A, similar to HT-SIG and VHT-SIG-A, indicates the signaling information required for corresponding HE functions. Specifically, HE-SIG-B indicates resource indication information for stations (STAs), such as... Figure 4 As shown. When the PPDU is HE ER SU PPDU, HE-SIG-A contains 4 symbols. The information in the second symbol is the same as the information in the first symbol, and the information in the fourth symbol is the same as the information in the third symbol. Therefore, the number of information symbols required to transmit the information is still two. For the other three formats, HE-SIG-A contains two symbols and two information symbols.

[0063] As can be seen from the above, starting with 11n, HT-SIG was introduced on the basis of L-SIG to further indicate the signaling information required for parsing data. Similarly, 11ac introduced VHT-SIG-A, and 11ax introduced HE-SIG-A. As the first field after L-SIG to carry the signaling information required by the corresponding standard, these fields carry important signaling information such as PPDU bandwidth and data modulation method. How to design and indicate the EHT-SIG-A of the new Extremely High Throughput (EHT) PPDU in the next-generation standard of 802.11ax is the problem that this application needs to solve. Among them, EHT is currently a code name for the next-generation standard. This application is not limited to this code name and may also use other codes such as Extreme Throughput (XT) and Ultra High Throughput (UHT). This application does not limit itself to these codes.

[0064] It should be understood that the application scenarios of this application embodiment can be communication between an AP and one or more STAs, and are also applicable to communication between APs and between STAs, such as... Figure 5 As shown.

[0065] Furthermore, in this application embodiment, the number of information symbols refers to the number of symbols required to carry information. When information in a symbol is copied, the number of symbols in the field is a multiple of the number of information symbols. When no information is copied, the number of information symbols and the number of symbols are the same. In this application embodiment, the information bandwidth refers to the basic bandwidth for carrying information encoding. When the PPDU bandwidth is greater than the information bandwidth, information is copied and transmitted at different frequencies in units of information bandwidth.

[0066] See Figure 6 As shown, this application provides a signaling field indication method to implement parameter design and indication for SIG-A, such as parameter design and indication for EHT-SIG-A.

[0067] Step 600: The transmitting end generates a PPDU, which includes a SIG-A indication field, wherein the SIG-A indication field includes at least one of a field for indicating the number of information symbols for SIG-A and a field for indicating the information bandwidth for SIG-A.

[0068] It should be understood that the SIG-A indication field may include a field for indicating the number of information symbols for SIG-A, or the SIG-A indication field may include a field for indicating the information bandwidth for SIG-A, or the SIG-A indication field may include a field for indicating the number of information symbols for SIG-A and a field for indicating the information bandwidth for SIG-A.

[0069] In one scenario, the number of information symbols in SIG-A is variable. For example, the number of information symbols in SIG-A can be 1, 2, or 3. In another scenario, the information bandwidth of SIG-A is variable. For example, the information bandwidth of SIG can be 20 MHz, or a fixed information bandwidth greater than 20 MHz (e.g., 40 MHz or 80 MHz). Alternatively, the information bandwidth of SIG can be 20 MHz, or the PPDU bandwidth. In yet another scenario, the number of information symbols in SIG-A is variable, and the information bandwidth of SIG-A is also variable.

[0070] It should be noted that the field indicating the number of information symbols for SIG-A in this embodiment can also be replaced with a field indicating the number of symbols for SIG-A. Specifically, when information in a symbol is copied, the number of symbols for SIG-A is a multiple of the number of information symbols for SIG-A; when there is no information copying, the number of symbols for SIG-A is equal to the number of information symbols for SIG-A. For example, if the next-generation standard specifies that there is no information copying, then the field indicating the number of information symbols for SIG-A is equivalent to the field indicating the number of symbols for SIG-A. If the next-generation standard still has information copying, then it can first indicate whether information copying exists in the PPDU. If information copying exists, then the number of symbols for SIG-A is obtained by transforming the number of symbols for SIG-A indicated by the field indicating the number of symbols for SIG-A; if there is no information copying, then the number of symbols for SIG-A indicated by the field indicating the number of symbols for SIG-A is the same as the number of information symbols for SIG-A.

[0071] Step 610: The sending end sends a PPDU.

[0072] Step 620: The receiving end receives the PPDU, reads the SIG-A indication field, and obtains at least one of the information symbol count and information bandwidth of SIG-A. Based on at least one of the information symbol count and information bandwidth of SIG-A, it reads SIG-A.

[0073] Specifically, when the SIG-A indication field includes a field for indicating the number of information symbols for SIG-A, the receiving end reads the field for indicating the number of information symbols for SIG-A; or, when the SIG-A indication field includes a field for indicating the information bandwidth for SIG-A, the receiving end reads the field for indicating the information bandwidth for SIG-A; or, when the SIG-A indication field includes both a field for indicating the number of information symbols for SIG-A and a field for indicating the information bandwidth for SIG-A, the receiving end reads both the field for indicating the number of information symbols for SIG-A and the field for indicating the information bandwidth for SIG-A.

[0074] The design of the fields used to indicate the number of information symbols for SIG-A and the fields used to indicate the information bandwidth for SIG-A is described in detail below. It should be understood that the following schemes are merely examples and are not intended to limit the embodiments of this application.

[0075] Part 1: The design of fields used to indicate the number of information symbols for SIG-A may include, but is not limited to, the following fields:

[0076] Option 1: The field used to indicate the number of information symbols in SIG-A is the length field included in L-SIG of the PPDU.

[0077] The structure of L-SIG is as follows: Figure 7 As shown, it includes a rate field, a reserved field (R), a length field, a parity bit (P), and a tail bit.

[0078]

[0079] TXTIME represents the transmission duration of the PPDU, and SignalExtension represents the length of the signal extension. This represents rounding up. There are K possible values ​​for m. Each of the K values ​​of m corresponds to at least two types of SIG-A information symbols. For example, it can correspond one-to-one with the information bandwidth of K types of SIG-A. K is a positive integer greater than or equal to 2.

[0080] For example, when K = 2, and m takes the value of 1 or 2, if m = 1, the number of information symbols indicating SIG-A in the length field is X1; if m = 2, the number of information symbols indicating SIG-A in the length field is X2, where X1 and X2 are distinct positive integers. Alternatively, when K = 3, if m = 0, the number of information symbols indicating SIG-A in the length field is X1; if m = 1, the number of information symbols indicating SIG-A in the length field is X2; if m = 3, the number of information symbols indicating SIG-A in the length field is X3, where X1, X2, and X3 are distinct positive integers.

[0081] For example, when m=1, the number of information symbols in EHT-SIG-A is 3; when m=2, the number of information symbols in EHT-SIG-A is 2. If BPSK, 1 / 2 code rate modulation is used, each symbol of EHT-SIG-A can carry 26 information bits. When the number of information symbols in EHT-SIG-A is 3, it can carry 78 information bits; when the number of information symbols in EHT-SIG-A is 2, it can carry 52 information bits. As another example, when m=1, the number of information symbols in EHT-SIG-A is 1; when m=2, the number of information symbols in EHT-SIG-A is 2. When the number of information symbols in EHT-SIG-A is 1, it can carry 26 information bits; when the number of information symbols in EHT-SIG-A is 2, it can carry 52 information bits.

[0082] Furthermore, after receiving the PPDU, the receiving end can read the Length field in the L-SIG to obtain the value of m, and then obtain the corresponding SIG-A information symbol count through the value of m. For example, as shown... Figure 8As shown, after receiving the PPDU, the receiving end performs automatic detection to determine that the PPDU is an EHT PPDU. It reads the Length field in L-SIG of the EHT PPDU, obtains the corresponding EHT-SIG-A information symbol count by the value of m, and then demodulates EHT-SIG-A according to the EHT-SIG-A information symbol count to obtain the corresponding information content.

[0083] Table 1 Information bits carried by EHT-SIG-A

[0084]

[0085]

[0086]

[0087] Table 1 provides an example of the information transmitted in EHT-SIG-A when the number of EHT-SIG-A information symbols is 3, 2, and 1, respectively. As shown in Table 1, generally speaking, a higher number of information symbols allows for the transmission of more fields, or the transmission of more bits in each field, achieving greater accuracy and supporting more signaling information required for various functions, such as full-duplex, AP collaboration, and spatial multiplexing. Conversely, a lower number of information symbols necessitates fixing certain parameters or sacrificing certain functions.

[0088] Therefore, Scheme 1 described above can flexibly indicate different numbers of SIG-A information symbols, achieving a trade-off between information accuracy, supported functions, and signaling overhead. Furthermore, indicating the number of SIG-A information symbols through the length field in L-SIG allows the receiver to obtain the number of SIG-A information symbols earlier, thereby acquiring the corresponding signaling information and executing the corresponding functions sooner, increasing the duration of multiplexed and cooperative transmission. Additionally, indicating the number of SIG-A information symbols allows the transmitter to provide more precise bandwidth indication, enabling the transmitter to use preamble puncture (not transmitting the preamble on certain 20MHz bandwidths) even when interference or radar signals exist in some channels, utilizing a larger PPDU bandwidth for transmission, increasing system spectral efficiency and throughput. Compared to the overhead of a single signaling field, this results in greater gains.

[0089] Option 2: The field used to indicate the number of information symbols for SIG-A is the signature symbol field in the PPDU, which includes the field used to indicate the number of information symbols for SIG-A and / or the field used to indicate the MCS for SIG-A.

[0090] The signature symbol field includes a predetermined sequence known to both the sender and receiver. The signature symbol field is located after L-SIG and before SIG-A. For example, as... Figure 9 As shown, the signature symbol field includes a signature field, a field indicating the number of information symbols for EHT-SIG-A, a field indicating the MCS for SIG-A, and a CRC. The signature field identifies the PPDU as an EHT PPDU.

[0091] It should be understood that the signature symbol field refers to the symbol field used by the receiving end to automatically detect the PPDU sent by the sending end, so that the receiving end can determine the type of the PPDU. This signature symbol field can also be called an EHT mark, a symbol used for automatic detection, etc., and this application does not limit the specific name of this symbol.

[0092] The field indicating the number of information symbols for SIG-A can be 1 bit, and the number of information symbols for SIG-A can be X1 or X2, where X1 and X2 are distinct positive integers, for example, X1 = 2 and X2 = 3. Alternatively, the field indicating the information bandwidth for SIG-A can also be 2 bits, and the number of information symbols for SIG-A can be X1, X2, X3, or X4, where X1, X2, X3, and X4 are positive integers, and at least two of them are distinct.

[0093] It should be understood that the field used to indicate the number of information symbols for SIG-A can be the field included in the signature symbol field of the PPDU that indicates the number of information symbols for SIG-A.

[0094] Alternatively, the field used to indicate the number of information symbols for SIG-A can be the field in the signature symbol field of the PPDU that indicates the MCS for SIG-A, where each MCS for SIG-A corresponds to one number of information symbols for SIG-A. For example, when the field indicating the MCS for SIG-A indicates MCS0, the corresponding number of information symbols for SIG-A is 2; and when the field indicating the MCS for SIG-A indicates MCS1, the corresponding number of information symbols for SIG-A is 1. As another example, when the field indicating the MCS for SIG-A indicates MCS0 or MCS1, the corresponding number of information symbols for SIG-A is 2; and when the field indicating the MCS for SIG-A indicates MCS2, the corresponding number of information symbols for SIG-A is 1.

[0095] Alternatively, the field used to indicate the number of information symbols for SIG-A can be the field used to indicate the number of information symbols for SIG-A and the field used to indicate the MCS for SIG-A, which are included in the signature symbol field of the PPDU.

[0096] Further, after receiving the PPDU, the receiving end reads the signature symbol field. The number of SIG-A information symbols is obtained through the field indicating the number of SIG-A information symbols in the signature symbol field; alternatively, the MCS of SIG-A is obtained through the field indicating the MCS of SIG-A in the signature symbol field, thereby obtaining the corresponding number of SIG-A information symbols. For example, as... Figure 9 As shown, after receiving the PPDU, the receiving end reads the signature symbol field after L-SIG. Through the signature field in the signature symbol field, it is determined that the PPDU is an EHT PPDU. The number of EHT-SIG-A information symbols is obtained through the field in the signature symbol field that indicates the number of EHT-SIG-A information symbols. The MCS of EHT-SIG-A is obtained through the field in the signature symbol field that indicates the MCS of EHT-SIG-A. Then, according to the number of EHT-SIG-A information symbols and the MCS of EHT-SIG-A, EHT-SIG-A is demodulated and the corresponding information content is obtained.

[0097] Therefore, Scheme 2 utilizes the field in the signature symbol field that indicates the number of information symbols for SIG-A and / or the field that indicates the MCS for SIG-A, allowing the receiving end to obtain the number of information symbols for SIG-A before SIG-A. Besides possessing the advantages of Scheme 1, which allows for flexible indication of different SIG-A information symbol numbers, Scheme 2 also includes a field in the signature symbol field that indicates the MCS for SIG-A. Therefore, the receiving end can determine the information transmission rate by obtaining the MCS for SIG-A; a higher MCS indicates a faster information transmission rate, more information bits that can be transmitted, or lower overhead.

[0098] Option 3: The field used to indicate the number of information symbols in SIG-A is the additional symbol indicator field included in the first X1 symbols in SIG-A.

[0099] The additional symbol indicator field indicates the difference ΔX between the number of SIG-A information symbols and X1. ΔX has K possible values, and each of the K ΔX values ​​corresponds to at least two different SIG-A information symbol counts. For example, it can correspond one-to-one with the K different SIG-A information symbol counts. If ΔX = 0, the number of SIG-A information symbols is X1; if ΔX is a positive integer, the number of SIG-A information symbols is X1 + ΔX, where X1 is a positive integer and K is a positive integer greater than or equal to 2.

[0100] For example, for Figure 10 , X1 = 2, ΔX = 0 or 1. The extra symbol indication field in the first two symbols indicates whether there are an additional ΔX EHT-SIG-A symbols. If the extra symbol indication field indicates that ΔX = 0, the number of information symbols of EHT-SIG-A is X1 = 2. If the extra symbol indication field indicates that ΔX = 1, the number of information symbols of EHT-SIG-A is X1 + ΔX = 3. At this time, the extra symbol indication field is 1 bit. For another example, the extra symbol indication field can be 2 bits. At this time, the extra symbol indication field can indicate the number of information symbols of 4 different SIG-A. For example, the number of information symbols of SIG-A can be 2, 4, 6, or 8. Then when X1 = 2, the extra symbol indication field can indicate whether ΔX is 0, 2, 4, or 6.

[0101] In a possible design, when the number of information symbols of SIG-A is X1 + ΔX, the first X1 symbols in SIG-A include an extra symbol indication field, a first CRC, and first tail bits. The first CRC is used to check whether the first X1 symbols are accurate, and the first tail bits are used for the receiving end to end the decoding of the first X1 symbols; the remaining ΔX symbols in SIG-A include a second CRC and second tail bits; the second CRC is used to check whether the ΔX symbols are accurate, and the second tail bits are used for the receiving end to end the decoding of SIG-A.

[0102] Exemplarily, as Figure 10 shown, assume there are two possibilities for the number of EHT-SIG-A information symbols: X1 and X2, where X1 < X2, X1 = 2, and the value of ΔX can be 0 or 1. The sending end first encodes the first two symbols of EHT-SIG-A. The information in the first two symbols finally includes a CRC, which is used to check whether the information of the first two symbols is accurate; 6 tail bits of 0 are used for the receiving end to end the decoding of the first two symbols. In addition, there is also an extra symbol indication field, which indicates whether there are ΔX additional EHT-SIG-A symbols. If the extra symbol indication field indicates that there are additional EHT-SIG-A symbols, the information in the additional EHT-SIG-A symbols finally also includes a CRC, which is used to check whether the information of the additional EHT-SIG-A symbols is accurate, and 6 tail bits of 0 are used to end the additional EHT-SIG-A symbols (or the decoding of all EHT-SIG-A symbols).

[0103] Furthermore, after receiving the PPDU, the receiving end obtains the number of information symbols for the corresponding SIG-A by reading the extra symbol indicator field included in the first X1 symbols of SIG-A. For example, upon receiving the PPDU, the receiving end first identifies it as an EHT PPDU, then demodulates the first X1 symbols of EHT-SIG-A. If a decoding error is detected using CRC, the data packet demodulation is considered faulty. If the CRC check is correct, the extra symbol indicator field is read. If the extra symbol indicator field indicates that no extra EHT-SIG-A symbols exist, the EHT-SIG-A information is read according to X1 EHT-SIG-A symbols; if the extra symbol indicator field indicates that extra EHT-SIG-A symbols exist, the subsequent ΔX EHT-SIG-A symbols are demodulated.

[0104] In one possible design, the receiver can continue decoding by utilizing the Viterbi state of the previous X1 symbols, performing joint decoding of EHT-SIG-A. For example... Figure 11 As shown, if joint decoding is used, when the number of information symbols in EHT-SIG-A is 3, the bit error rate (BER) of the overall 78 bits is lower than that of the first 52 bits under the same signal-to-noise ratio (SNR).

[0105] Therefore, Scheme 3 utilizes the additional symbol indicator field included in the first X1 symbols of SIG-A to obtain the number of information symbols in SIG-A, which can flexibly indicate different numbers of information symbols in SIG-A, has the beneficial effects of Scheme 1, and is not heavily dependent on the previous symbol design of SIG-A.

[0106] Part Two: The design of fields used to indicate the information bandwidth of SIG-A may include, but is not limited to, the following fields:

[0107] Option 1: The field used to indicate the information bandwidth of SIG-A is the length field included in L-SIG of PPDU.

[0108] The structure of L-SIG is as follows: Figure 7 As shown.

[0109]

[0110] The number of possible values ​​for m is K. Each of the K possible values ​​for m corresponds to at least two types of SIG-A information bandwidth. For example, each of the K possible values ​​for m can correspond one-to-one with a type of SIG-A information bandwidth. K is a positive integer greater than or equal to 2.

[0111] For example, when K=2 and m takes the value of 1 or 2, if m=1, the length field indicates that the information bandwidth of SIG-A is X1, and if m=2, the length field indicates that the information bandwidth of SIG-A is X2, where X1 and X2 are distinct positive integers.

[0112] For example, when K=2, and m takes the value of 1 or 2, if m=1, the length field indicates that the information bandwidth of EHT-SIG-A is 20MHz; if m=2, the length field indicates that the information bandwidth of EHT-SIG-A is the PPDU bandwidth. The PPDU bandwidth can be carried through the signature symbol field, or the receiver can perform blind detection through the preamble field.

[0113] For example, when K=2, and m takes the value of 1 or 2, if m=1, the length field indicates that the information bandwidth of EHT-SIG-A is 20MHz. If the PPDU bandwidth is greater than 20MHz, the information is copied on different 20MHz bands. If m=2, the length field indicates that the information bandwidth of EHT-SIG-A is a fixed information bandwidth greater than 20MHz. Assuming the fixed information bandwidth greater than 20MHz is 40MHz, if the PPDU bandwidth is greater than 40MHz, the information is copied on different 40MHz bands. Figure 12 As shown, if m=1, PPDU follows Figure 12 The upper half of the signal is transmitted, modulated with EHT-SIG-A in 20MHz base units. This scheme is suitable when the PPDU bandwidth is 20MHz, or when some STAs only support a 20MHz receiving bandwidth, or other similar situations. Figure 12 As shown, a scenario of preamble breakdown exists. If m=2, the PPDU follows... Figure 12 The lower half of the signal is transmitted, modulated with EHT-SIG-A in 40MHz base units. This scheme allows EHT-SIG-A to transmit more information bits in a single symbol, reducing EHT-SIG-A overhead.

[0114] For example, when K=2 and m takes the value of 1 or 2, if m=1, the bandwidth mode indicated by the length field is the breakdown mode, and the information bandwidth of EHT-SIG-A corresponding to the breakdown mode is 20MHz; if m=2, the bandwidth mode indicated by the length field is the non-breakdown mode, and the information bandwidth of EHT-SIG-A corresponding to the non-breakdown mode is the PPDU bandwidth. Alternatively, when K=2 and m takes the value of 1 or 2, if m=1, the bandwidth mode indicated by the length field is the breakdown mode, and the information bandwidth of EHT-SIG-A corresponding to the breakdown mode is 20MHz; if m=2, the bandwidth mode indicated by the length field is the non-breakdown mode, and the information bandwidth of EHT-SIG-A corresponding to the non-breakdown mode is a fixed information bandwidth greater than 20MHz.

[0115] It should be noted that because the L-LTF used for channel estimation is transmitted in 20MHz units, a guard interval is reserved between two L-LTFs. This means that some subcarriers lack the L-LTF sequence, making channel estimation impossible. This application proposes that SIG-A information not be transmitted on the subcarriers corresponding to the reserved guard interval. Figure 12 The null symbol is marked in the middle. Alternatively, a sequence for channel estimation can be inserted on the subcarriers corresponding to the reserved guard interval, i.e. Figure 12 The LTF tones (subcarriers) are marked in the diagram. This allows the symbols following SIG-A to utilize these subcarriers to transmit information. For example... Figure 13 As shown, EHT-SIG-A transmits in 80MHz units. In EHT-SIG-A, channel estimation of the reserved guard interval cannot be performed through L-LTF. By transmitting LTF tones on the corresponding subcarriers of the reserved guard interval, the receiver can obtain all the required channel information in the EHT-SIG-B field through L-LTF and LTF tones in EHT-SIG-A. Therefore, information can also be transmitted on the corresponding subcarriers of EHT-SIG-B.

[0116] For example, with a PPDU bandwidth of 80MHz, containing 256 subcarriers (-128, ..., 127), and a SIG-A information bandwidth of 40MHz, SIG-A occupies subcarriers in four 20MHz intervals from low to high frequency: (-124, ..., -69), (-60, ..., -5), (4, ..., 59), and (68, ..., 123), for a total of 224 subcarriers. The first and second 20MHz intervals, from low to high frequency, can form the first SIG-A with a 40MHz information bandwidth, and the third and fourth 20MHz intervals can form the second SIG-A with a 40MHz information bandwidth. Based on this subcarrier tone plan, sequences known to both the transmitter and receiver can be transmitted on some or all of the subcarriers (-68, ..., 61) and (59, ..., 67). These sequences are used for channel estimation.

[0117] Furthermore, after receiving the PPDU, the receiver can read the Length field in L-SIG to obtain the value of m, and then obtain the information bandwidth of the corresponding SIG-A through the value of m.

[0118] Therefore, Scheme 1 uses the Length field in L-SIG to obtain the value of m, and obtains the corresponding SIG-A information bandwidth through the value of m. This allows for flexible indication of different SIG-A information bandwidths, thereby increasing the number of information bits that SIG-A can carry.

[0119] Option 2: The field used to indicate the information bandwidth of SIG-A is the signature symbol field in the PPDU that includes the field used to indicate the information bandwidth of SIG-A; wherein the signature symbol field includes a predetermined sequence known to both the sender and the receiver, and the signature symbol field is located after L-SIG and before SIG-A.

[0120] The field indicating the information bandwidth of SIG-A can be 1 bit. For example, the field indicating the information bandwidth of SIG-A can indicate an information bandwidth of 20 MHz or a fixed information bandwidth greater than 20 MHz (such as 40 MHz, 80 MHz). As another example, the field indicating the information bandwidth of SIG-A can indicate an information bandwidth of 20 MHz or PPDU bandwidth. Optionally, the signature symbol field may also include a field indicating the PPDU bandwidth.

[0121] Alternatively, the field used to indicate the information bandwidth of SIG-A can also be 2 bits. For example, the information bandwidth of SIG-A can be 20MHz, 40MHz, 80MHz, or 160MHz.

[0122] like Figure 14 As shown, the signature symbol field also includes a field indicating the PPDU bandwidth. When the SIG-A information bandwidth is 20MHz or a fixed information bandwidth greater than 20MHz, and if the fixed information bandwidth greater than 20MHz is 40MHz, then when the PPDU bandwidth is 20MHz, the field indicating the SIG-A information bandwidth indicates 20MHz. When the PPDU bandwidth is 40MHz or higher, the field indicating the SIG-A information bandwidth indicates 20MHz or 40MHz. If the fixed information bandwidth greater than 20MHz is 80MHz, then when the PPDU bandwidth is 20MHz, the field indicating the SIG-A information bandwidth indicates 20MHz. When the PPDU bandwidth is 40MHz, the field indicating the SIG-A information bandwidth indicates 20MHz. When the PPDU bandwidth is 80MHz or higher, the field indicating the SIG-A information bandwidth indicates 20MHz or 80MHz.

[0123] like Figure 14As shown, the signature symbol field also includes a field for indicating the PPDU bandwidth. When the information bandwidth of SIG-A is 20MHz or the PPDU bandwidth, the field for indicating the information bandwidth of SIG-A indicates that the information bandwidth of SIG-A is 20MHz or the PPDU bandwidth.

[0124] Furthermore, after receiving the PPDU at the receiving end, the signature symbol field is read, and the information bandwidth of SIG-A is obtained through the field in the signature symbol field that indicates the information bandwidth of SIG-A. Therefore, Scheme 1 uses the field in the signature symbol field that indicates the information bandwidth of SIG-A to obtain the information bandwidth of SIG-A, which can flexibly indicate different SIG-A information bandwidths and increase the number of information bits that SIG-A can carry.

[0125] Option 3: The field used to indicate the information bandwidth of SIG-A is the signature symbol field in the PPDU, which includes the field used to indicate the bandwidth mode.

[0126] If the field indicating the bandwidth mode indicates a breakdown bandwidth, then the information bandwidth of SIG-A is 20 MHz. If the field indicating the bandwidth mode indicates a non-breakdown bandwidth, then the information bandwidth of SIG-A is a fixed information bandwidth or PPDU bandwidth greater than 20 MHz. Optionally, the signature symbol field may also include a field indicating the PPDU bandwidth.

[0127] The signature symbol field includes a predetermined sequence known to both the sender and the receiver. The signature symbol field is located after L-SIG and before SIG-A.

[0128] Furthermore, after receiving the PPDU, the receiving end reads the signature symbol field and obtains the corresponding SIG-A information bandwidth through the field in the signature symbol field that indicates the bandwidth mode. Therefore, Scheme 1 uses the field in the signature symbol field that indicates the bandwidth mode to obtain the SIG-A information bandwidth, which can flexibly indicate different SIG-A information bandwidths and increase the number of information bits that SIG-A can carry.

[0129] Furthermore, when the EHT-SIG-A can hold a large number of information bits, the number of information bits it can carry may far exceed the required number of information bits. For example, with the same number of information symbols in SIG-A systems, a 160MHz SIG-A system can carry eight times the number of information bits that a 20MHz SIG-A system can carry. To address the situation where the number of information bits that can be carried far exceeds the required number of information bits, the following methods can be used:

[0130] Method 1: The sending end repeats the information bits to be transmitted. For example, if the information bits to be transmitted are b0, b1, ..., b25, and the number of information bits that can be carried is 4 times 26 bits, i.e., 104 bits, then the information bits can be carried in the following manner: b0, b1, ..., b25, b0, b1, ..., b25, b0, b1, ..., b25, b0, b1, ..., b25.

[0131] Method 2: Set the extra bits as reserved bits for use in subsequent designs.

[0132] Method 3: Use extra bits as padding bits. For padding bits, the bit sequence can be defined in advance, such as a bit sequence of 010101…, or the bit sequence can be left undefined and determined by the sender.

[0133] Method 4: The information corresponding to SIG-B in the smaller bandwidth SIG-A is pre-carried in the larger bandwidth SIG-A. If the information in SIG-B has already been transmitted, there is no need to transmit SIG-B. If there is still untransmitted information, it is further carried in SIG-B. Optionally, the larger bandwidth SIG-A can indicate the number of untransmitted SIG-B symbols.

[0134] In the embodiments provided above, the various solutions provided by the embodiments of this application have been described from the perspectives of the individual devices themselves and the interactions between the devices. It is understood that each device, such as the aforementioned transmitting end and receiving end, includes corresponding hardware structures and / or software modules to perform the aforementioned functions. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0135] For example, based on the above embodiments, this application provides a signaling field indication device for performing operations at the sending end. Figure 15 As shown, the device 1500 includes:

[0136] Processing unit 1501 is used to generate PPDU; the PPDU includes a signaling field SIG-A indication field, wherein the SIG-A indication field includes at least one of a field for indicating the number of information symbols of the SIG-A and a field for indicating the information bandwidth of the SIG-A;

[0137] The transmitting unit 1502 is used to transmit the PPDU.

[0138] It should be understood that the signaling field indication device described in this embodiment has any of the functions of the sending end in the above method. The arbitrary functions can be referred to the description in the above method, and will not be repeated here.

[0139] For example, based on the above embodiments, this application provides a signaling field indication device for performing operations at the receiving end. For instance... Figure 16 As shown, the device 1600 includes:

[0140] The receiving unit 1601 is configured to receive a PPDU, the PPDU including a SIG-A indication field, wherein the SIG-A indication field includes at least one of a field for indicating the number of information symbols of the SIG-A and a field for indicating the information bandwidth of the SIG-A;

[0141] Processing unit 1602 is configured to read the SIG-A indication field, obtain at least one of the number of information symbols of the SIG-A and the information bandwidth of the SIG-A, and read the SIG-A based on at least one of the number of information symbols of the SIG-A and the information bandwidth of the SIG-A.

[0142] It should be understood that the signaling field indication device described in this embodiment has any of the functions of the receiving end in the above method. The arbitrary functions can be referred to the description in the above method, and will not be repeated here.

[0143] Based on the above embodiments, this application also provides a signaling field indication device, see below. Figure 17 As shown, the device 1700 includes a transceiver 1701, a processor 1702, and a memory 1703. The processor can be a CPU, a network processor (NP), a hardware chip, or any combination thereof. The memory can include volatile memory, such as random access memory (RAM), or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD). The memory can also include combinations of the above types of memory.

[0144] When the device is a transmitter, memory 1703 is used to store computer programs; processor 1702 calls the computer programs stored in memory 1703 and executes the methods executed by the transmitter in the above embodiments through transceiver 1701. When the device is a receiver, memory 1703 is used to store computer programs; processor 1702 calls the computer programs stored in memory 1703 and executes the methods executed by the receiver in the above embodiments through transceiver 1701.

[0145] Understandably, the above Figure 15 The apparatus in the illustrated embodiment can be used as follows: Figure 17 The device 1700 shown is implemented. Specifically, the processing unit 1501 can be implemented by a processor 1702, and the transmitting unit 1502 can be implemented by a transceiver 1701. The above... Figure 16 The apparatus in the illustrated embodiment can be used as follows: Figure 17 The device 1700 shown is implemented. Specifically, the processing unit 1602 can be implemented by a processor 1702, and the receiving unit 1601 can be implemented by a transceiver 1701.

[0146] This application also provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform the methods shown in the above embodiments.

[0147] In summary, using the signaling field indication provided in this application embodiment, the sending end generates a PPDU; the PPDU includes a signaling field SIG-A indication field, wherein the SIG-A indication field includes at least one field indicating the number of information symbols for SIG-A and a field indicating the information bandwidth for SIG-A. The sending end transmits the PPDU. The method of this application can flexibly indicate different numbers of SIG-A information symbols and / or different SIG-A information bandwidths, enabling SIG-A to transmit more information bits, and achieving a trade-off between information accuracy, supported function count, and signaling overhead.

[0148] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, embodiments of this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of this application can take the form of computer program products implemented 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.

[0149] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. 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.

[0150] 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.

[0151] 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.

[0152] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A signaling field indication method, characterized in that, The method includes: The Physical Layer Protocol Data Unit (PPDU) is received. The PPDU includes a signaling field, which includes a field for indicating the number of information symbols for EHT-SIG-A and a field for indicating that the PPDU is an Extremely High Throughput PPDU (EHT PPDU). The signaling field is located after the conventional signaling field L-SIG in the PPDU and before the EHT-SIG-A in the PPDU. Read the signaling field to determine the number of information symbols in the EHT-SIG-A and that the PPDU is an EHT PPDU.

2. The method as described in claim 1, characterized in that, The signaling field also includes a field for indicating the modulation and coding strategy (MCS) of the EHT-SIG-A.

3. The method as described in claim 1 or 2, characterized in that, The signaling field also includes a Cyclic Redundancy Code (CRC) field.

4. The method as described in claim 1 or 2, characterized in that, The field used to indicate the number of information symbols in EHT-SIG-A is an additional symbol indication field included in the first X1 symbols of EHT-SIG-A; The additional symbol indicator field indicates the difference ΔX between the number of EHT-SIG-A information symbols and X1. The value of ΔX is K, and the K values ​​of ΔX correspond one-to-one with the number of information symbols of K types of EHT-SIG-A. If ΔX=0, the number of information symbols of EHT-SIG-A is X1. If ΔX is a positive integer, the number of information symbols of EHT-SIG-A is X1+ΔX, where X1 and K are both positive integers.

5. The method as described in claim 4, characterized in that, When the number of information symbols in the EHT-SIG-A is X1 + ΔX, the first X1 symbols in the EHT-SIG-A include the additional symbol indicator field, a first CRC, and a first tail bit. The first CRC is used to verify whether the first X1 symbols are accurate, and the first tail bit is used by the receiving end to end the decoding of the first X1 symbols. The remaining ΔX symbols in the EHT-SIG-A include a second CRC and a second tail bit. The second CRC is used to verify whether the ΔX symbols are accurate, and the second tail bit is used by the receiving end to end the decoding of the EHT-SIG-A.

6. A communication device, characterized in that, The device includes: A receiving unit is configured to receive a Physical Layer Protocol Data Unit (PPDU), the PPDU including a signaling field, the signaling field including: a field for indicating the number of information symbols for EHT-SIG-A, and a field for indicating that the PPDU is an Extremely High Throughput PPDU (EHT PPDU), the signaling field being located after the conventional signaling field L-SIG in the PPDU and before the EHT-SIG-A in the PPDU; The processing unit is used to read the signaling field and determine the number of information symbols in the EHT-SIG-A and whether the PPDU is an EHT PPDU.

7. The communication device as claimed in claim 6, characterized in that, The signaling field also includes a field for indicating the modulation and coding strategy (MCS) of the EHT-SIG-A.

8. The communication device as described in claim 6 or 7, characterized in that, The signaling field also includes a Cyclic Redundancy Code (CRC) field.

9. The communication device as described in claim 6 or 7, characterized in that, The field used to indicate the number of information symbols in EHT-SIG-A is an additional symbol indication field included in the first X1 symbols of EHT-SIG-A; The additional symbol indicator field indicates the difference ΔX between the number of EHT-SIG-A information symbols and X1. The value of ΔX is K, and the K values ​​of ΔX correspond one-to-one with the number of information symbols of K types of EHT-SIG-A. If ΔX=0, the number of information symbols of EHT-SIG-A is X1. If ΔX is a positive integer, the number of information symbols of EHT-SIG-A is X1+ΔX, where X1 and K are both positive integers.

10. The communication device as claimed in claim 9, characterized in that, When the number of information symbols in the EHT-SIG-A is X1 + ΔX, the first X1 symbols in the EHT-SIG-A include the additional symbol indicator field, a first CRC, and a first tail bit. The first CRC is used to verify whether the first X1 symbols are accurate, and the first tail bit is used by the receiving end to end the decoding of the first X1 symbols. The remaining ΔX symbols in the EHT-SIG-A include a second CRC and a second tail bit. The second CRC is used to verify whether the ΔX symbols are accurate, and the second tail bit is used by the receiving end to end the decoding of the EHT-SIG-A.

11. A communication device comprising a processor and a memory, the memory being used to store instructions, characterized in that, When the instruction is executed by the processor, the communication device performs the method as described in any one of claims 1-5.

12. The communication device as claimed in claim 11, characterized in that, The communication device is an access point (AP) or a station (STA).

13. A computer program product comprising instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-5.

14. A computer-readable storage medium comprising instructions for implementing the method as described in any one of claims 1-5.

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