Devices and methods for transmitting information and storage media readable by computers.

Abstract

The invention relates to the field of communication techniques and proposes a device and method for transmitting information, a computer-readable storage medium, to reduce the peak-to-average power ratio (PAPR) of a physical layer protocol data unit (PHY protocol data unit, PPDU) for transmission in a 320 MHz bandwidth. The method of transmission consists of: a transmitting device that generates a PPDU of 320 MHz bandwidth, in which some or all of the fields of the PPDU are rotated in the 320 MHz bandwidth based on a series of rotation factors, the 320 MHz bandwidth comprising sixteen 20 MHz subchannels, the series of rotation factors comprising sixteen rotation factors, and each 20 MHz subchannel corresponding to a rotation factor. The transmitting device sends the PPDU. For example, the series of rotational coefficients could be [1, 1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1].

Description

Information transmission method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 26, 2020, with application number 202011569822.3 and invention name “Information Transmission Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to an information transmission method and device. Background Art

[0003] Orthogonal frequency division multiplexing (OFDM) is a multi-carrier modulation technology that offers advantages such as high spectral efficiency and robustness to multipath fading. However, it also suffers from a high peak-to-average power ratio (PAPR). The accumulation of multiple subcarriers in OFDM generates large peak signals, requiring high-power amplifiers (HPAs) with a large linear dynamic range. This increases the amplifier's cost and reduces its efficiency. If the peak exceeds the HPA's linear dynamic range, it will cause in-band distortion and out-of-band dispersion. Therefore, reducing PAPR is a key technology in OFDM systems and is of great significance.

[0004] The Institute of Electrical and Electronics Engineers (IEEE) is currently discussing the next-generation 802.11be standard, the successor to 802.11ax. Compared to the previous 802.11ax standard, 802.11be supports extremely high throughput (EHT) data transmission. The maximum transmission bandwidth supported by 802.11be is 320 MHz. With a 320 MHz bandwidth, the PAPR problem is even more severe. Therefore, reducing the PAPR in this 320 MHz bandwidth is a pressing issue.

[0005] Summary of the Invention

[0006] The present application provides an information transmission method and apparatus for reducing PAPR in a 320 MHz bandwidth.

[0007] In a first aspect, a method for information transmission is provided, comprising: a transmitting device generating a physical layer protocol data unit (PHY protocol data unit, PPDU) with a 320 MHz bandwidth, rotating some or all fields of the PPDU using a rotation factor sequence within the 320 MHz bandwidth, wherein the 320 MHz bandwidth includes 16 20 MHz segments, and the rotation factor sequence includes 16 rotation factors, one for each 20 MHz segment; and transmitting the PPDU. Based on the above technical solution, some or all fields of the 320 MHz PPDU are rotated using the rotation factor sequence within the 320 MHz bandwidth, thereby reducing the PAPR of some or all fields of the PPDU at large bandwidths using the rotation factor sequence.

[0008] In one possible design, all fields of the PPDU are transmitted in non-HT copy mode.

[0009] In one possible design, all fields of the PPDU are rotated by a sequence of rotation factors.

[0010] In one possible design, some fields of the PPDU are transmitted in duplicate every 20 MHz.

[0011] In one possible design, some fields of the PPDU are rotated using a rotation factor sequence.

[0012] In one possible design, some fields of the PPDU include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG or EHT-SIG.

[0013] In one possible design, the rotation factor sequence is the target sequence; alternatively, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, where the target operation includes one or more of the following: global inversion, reverse order, or alternating inversion. Based on this design, compared to the rotation factor sequence [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1,1] provided in the related art, the rotation factor sequence provided in this application can more effectively reduce the PAPR of PPDUs with a 320 MHz bandwidth.

[0014] Optionally, the target sequence is one of the following:

[0015] [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1]; or,

[0016] [1,1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,1]; or,

[0017] [1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1]; or,

[0018] [1,1,1,1,1,-1,1,-1,-1,-1,1,1,1,-1,-1]; or,

[0019] [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,-1,-1]; or,

[0020] [1,1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1]; or,

[0021] [1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1,1].

[0022] In one possible design, the rotation factor sequence is the target sequence; alternatively, the rotation factor sequence is the sequence obtained by completely inverting the target sequence. Based on this design, compared to the rotation factor sequence [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1,1] provided in the related art, the rotation factor sequence provided in this application can more effectively reduce the PAPR of a 320MHz bandwidth PPDU. Furthermore, the rotation factor sequence provided by this design does not affect the channel smoothing operations performed by the receiving device on the 80MHz sub-channel content.

[0023] Optionally, the target sequence is one of the following:

[0024] [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0025] [1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,1,1].

[0026] In a second aspect, an information transmission method is provided, comprising: a receiving device receiving a 320 MHz bandwidth PPDU, rotating some or all fields of the PPDU using a rotation factor sequence within the 320 MHz bandwidth, where the 320 MHz bandwidth includes 16 20 MHz segments, and the rotation factor sequence includes 16 rotation factors, one for each 20 MHz segment; and parsing the PPDU. Based on the above technical solution, some or all fields of the 320 MHz PPDU are rotated using the rotation factor sequence within the 320 MHz bandwidth, thereby reducing the PAPR of some or all fields of the PPDU within the wide bandwidth.

[0027] In one possible design, the above-mentioned parsing of the PPDU includes: rotating and recovering part or all of the fields of the PPDU on the 320 MHz bandwidth according to the rotation recovery factor sequence corresponding to the rotation factor sequence, to obtain the PPDU before rotation, and the rotation recovery factor included in the rotation recovery factor sequence corresponds one-to-one to the rotation factor in the rotation factor sequence.

[0028] In one possible design, all fields of the PPDU are received in a non-HT copy.

[0029] In one possible design, all fields of the PPDU are rotated by a sequence of rotation factors.

[0030] In one possible design, some fields of the PPDU are received in units of 20 MHz.

[0031] In one possible design, some fields of the PPDU are rotated using a rotation factor sequence.

[0032] In one possible design, some fields of the PPDU include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG or EHT-SIG.

[0033] In one possible design, the rotation factor sequence is the target sequence; alternatively, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, where the target operation includes one or more of the following: global inversion, reverse order, or alternating inversion. Based on this design, compared to the rotation factor sequence [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1,1] provided in the related art, the rotation factor sequence provided in this application can more effectively reduce the PAPR of PPDUs with a 320 MHz bandwidth.

[0034] Optionally, the target sequence is one of the following:

[0035] [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1]; or,

[0036] [1,1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,1]; or,

[0037] [1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1]; or,

[0038] [1,1,1,1,1,-1,1,-1,-1,-1,1,1,1,-1,-1]; or,

[0039] [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,-1,-1]; or,

[0040] [1,1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1]; or,

[0041] [1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1,1].

[0042] In one possible design, the rotation factor sequence is the target sequence; alternatively, the rotation factor sequence is the sequence obtained by completely inverting the target sequence. Based on this design, compared to the rotation factor sequence [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1,1] provided in the related art, the rotation factor sequence provided in this application can more effectively reduce the PAPR of a 320MHz bandwidth PPDU. Furthermore, the rotation factor sequence provided by this design does not affect the channel smoothing operations performed by the receiving device on the 80MHz sub-channel content.

[0043] Optionally, the target sequence is one of the following:

[0044] [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0045] [1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,1,1].

[0046] In a third aspect, an information transmission method is provided, comprising: a transmitting device generating a 320 MHz bandwidth PPDU, rotating subcarriers in the 320 MHz bandwidth used to carry some or all fields of the PPDU according to a rotation factor; and transmitting the PPDU. Based on the above technical solution, rotating the subcarriers in the 320 MHz bandwidth used to carry some or all fields of the PPDU according to the rotation factor can reduce the PAPR of some or all fields of the PPDU in the wide bandwidth.

[0047] In one possible design, all fields of the PPDU are transmitted in non-HT copy mode.

[0048] In one possible design, the subcarriers carrying all fields of the PPDU are rotated according to a rotation factor sequence.

[0049] In one possible design, some fields of the PPDU are transmitted in duplicate every 20 MHz.

[0050] In one possible design, the subcarriers carrying part of the fields of the PPDU are rotated according to a rotation factor sequence.

[0051] In one possible design, the correspondence between the subcarrier and the rotation factor can refer to any one of formulas (1-1) to (9-1) in the following text.

[0052] In a fourth aspect, an information transmission method is provided, comprising: a receiving device receiving a PPDU with a 320 MHz bandwidth, rotating subcarriers in the 320 MHz bandwidth used to carry some or all fields of the PPDU according to a rotation factor; and receiving the PPDU. Based on the above technical solution, rotating the subcarriers in the 320 MHz bandwidth used to carry some or all fields of the PPDU according to the rotation factor can reduce the PAPR of some or all fields of the PPDU in the wide bandwidth.

[0053] In one possible design, the above-mentioned parsing of the PPDU includes: rotating and recovering the subcarriers used to carry part or all of the fields of the PPDU according to the rotation recovery factor to obtain the PPDU before rotation, and the product of the subcarrier rotation factor and the subcarrier rotation recovery factor is 1.

[0054] In one possible design, all fields of the PPDU are received in a non-HT copy.

[0055] In one possible design, the subcarriers carrying all fields of the PPDU are rotated according to a rotation factor sequence.

[0056] In one possible design, some fields of the PPDU are received in units of 20 MHz.

[0057] In one possible design, the subcarriers carrying part of the fields of the PPDU are rotated according to a rotation factor sequence.

[0058] In one possible design, the correspondence between the subcarrier and the rotation factor can refer to any one of Formulas (1-1) to (9-1) in the following text.

[0059] According to a fifth aspect, a communication device is provided, comprising a processing module and a communication module. The processing module is configured to generate a PPDU with a 320 MHz bandwidth, wherein some or all fields of the PPDU are rotated within the 320 MHz bandwidth using a rotation factor sequence. The 320 MHz bandwidth includes 16 20 MHz segments, and the rotation factor sequence includes 16 rotation factors, one for each 20 MHz segment. The communication module is configured to transmit the PPDU.

[0060] In one possible design, all fields of the PPDU are transmitted in non-HT copy mode.

[0061] In one possible design, all fields of the PPDU are rotated by a sequence of rotation factors.

[0062] In one possible design, some fields of the PPDU are transmitted in duplicate every 20 MHz.

[0063] In one possible design, some fields of the PPDU are rotated using a rotation factor sequence.

[0064] In one possible design, some fields of the PPDU include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG or EHT-SIG.

[0065] In one possible design, the rotation factor sequence is the target sequence; or, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, where the target operation includes one or more of the following: global inversion, reverse order, or alternating inversion.

[0066] Optionally, the target sequence is one of the following:

[0067] [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1]; or,

[0068] [1,1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,1]; or,

[0069] [1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1]; or,

[0070] [1,1,1,1,1,-1,1,-1,-1,-1,1,1,1,-1,-1]; or,

[0071] [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,-1,-1]; or,

[0072] [1,1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1]; or,

[0073] [1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1,1].

[0074] In one possible design, the rotation factor sequence is the target sequence; or, the rotation factor sequence is a sequence obtained by completely inverting the target sequence.

[0075] Optionally, the target sequence is one of the following:

[0076] [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0077] [1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,1,1].

[0078] According to a sixth aspect, a communication device is provided, comprising a processing module and a communication module. The communication module is configured to receive a PPDU with a 320 MHz bandwidth, wherein some or all fields of the PPDU are rotated within the 320 MHz bandwidth using a rotation factor sequence. The 320 MHz bandwidth includes 16 20 MHz segments, and the rotation factor sequence includes 16 rotation factors, one for each 20 MHz segment. The processing module is configured to parse the PPDU.

[0079] In one possible design, the processing module is specifically used to rotate and recover part or all of the fields of the PPDU on the 320 MHz bandwidth according to the rotation recovery factor sequence corresponding to the rotation factor sequence, to obtain the PPDU before rotation, and the rotation recovery factor included in the rotation recovery factor sequence corresponds one-to-one to the rotation factor in the rotation factor sequence.

[0080] In one possible design, all fields of the PPDU are received in a non-HT copy.

[0081] In one possible design, all fields of the PPDU are rotated by a sequence of rotation factors.

[0082] In one possible design, some fields of the PPDU are received in units of 20 MHz.

[0083] In one possible design, some fields of the PPDU are rotated using a rotation factor sequence.

[0084] In one possible design, some fields of the PPDU include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG or EHT-SIG.

[0085] In one possible design, the rotation factor sequence is the target sequence; or, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, where the target operation includes one or more of the following: global inversion, reverse order, or alternating inversion.

[0086] Optionally, the target sequence is one of the following:

[0087] [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1]; or,

[0088] [1,1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,1]; or,

[0089] [1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1]; or,

[0090] [1,1,1,1,1,-1,1,-1,-1,-1,1,1,1,-1,-1]; or,

[0091] [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,-1,-1]; or,

[0092] [1,1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1]; or,

[0093] [1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1,1].

[0094] In one possible design, the rotation factor sequence is the target sequence; or, the rotation factor sequence is a sequence obtained by completely inverting the target sequence.

[0095] Optionally, the target sequence is one of the following:

[0096] [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0097] [1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,1,1].

[0098] In a seventh aspect, a communication device is provided, comprising a processing module and a communication module. The processing module is configured to generate a 320 MHz bandwidth PPDU, wherein the subcarriers of some or all fields of the 320 MHz bandwidth used to carry the PPDU are rotated according to a rotation factor. The communication module is configured to transmit the PPDU.

[0099] In one possible design, all fields of the PPDU are transmitted in non-HT copy mode.

[0100] In one possible design, the subcarriers carrying all fields of the PPDU are rotated according to a rotation factor sequence.

[0101] In one possible design, some fields of the PPDU are transmitted in duplicate every 20 MHz.

[0102] In one possible design, the subcarriers carrying part of the fields of the PPDU are rotated according to a rotation factor sequence.

[0103] In one possible design, the correspondence between the subcarrier and the rotation factor can refer to any one of Formulas (1-1) to (9-1) in the following text.

[0104] In an eighth aspect, a communication device is provided, comprising a processing module and a communication module. The communication module is configured to receive a 320 MHz bandwidth PPDU, wherein the subcarriers of the 320 MHz bandwidth used to carry some or all fields of the PPDU are rotated according to a rotation factor. The processing module is configured to parse the PPDU.

[0105] In one possible design, the parsing module is specifically used to rotate and recover the subcarriers used to carry part or all of the fields of the PPDU according to the rotation recovery factor to obtain the PPDU before rotation, and the product between the subcarrier rotation factor and the subcarrier rotation recovery factor is 1.

[0106] In one possible design, all fields of the PPDU are received in a non-HT copy.

[0107] In one possible design, the subcarriers carrying all fields of the PPDU are rotated according to a rotation factor sequence.

[0108] In one possible design, some fields of the PPDU are received in units of 20 MHz.

[0109] In one possible design, the subcarriers carrying part of the fields of the PPDU are rotated according to a rotation factor sequence.

[0110] In one possible design, the correspondence between the subcarrier and the rotation factor can refer to any one of Formulas (1-1) to (9-1) in the following text.

[0111] In a ninth aspect, a communication device is provided, comprising a processor and a transceiver. The processor is configured to execute the generating action in the corresponding method in the first or third aspect, and the transceiver pins are configured to execute the sending action in the corresponding method in the first or third aspect.

[0112] In a tenth aspect, a communication device is provided, comprising a processor and a transceiver. The processor is configured to perform the parsing action in the corresponding method of the second aspect or the fourth aspect, and the transceiver pins are configured to perform the receiving action in the corresponding method of the second aspect or the fourth aspect.

[0113] In the eleventh aspect, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed on a computer, the computer executes the information transmission method provided by any possible implementation of any of the first to fourth aspects above.

[0114] In the twelfth aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the information transmission method provided by any possible implementation of any one of the first to fourth aspects above.

[0115] In the thirteenth aspect, a chip is provided, comprising: a processing circuit and a transceiver pin, wherein the processing circuit is used to execute the generating action in the corresponding method in the above-mentioned first aspect or third aspect, and the transceiver pin is used to execute the sending action in the corresponding method in the above-mentioned first aspect or third aspect.

[0116] In the fourteenth aspect, a chip is provided, comprising: a processing circuit and a transceiver pin, wherein the processing circuit is used to execute the parsing action in the corresponding method in the second aspect or the fourth aspect, and the transceiver pin is used to execute the receiving action in the corresponding method in the second aspect or the fourth aspect.

[0117] It can be understood that any of the communication devices, chips, computer storage media or computer program products provided above are used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0118] FIG1 is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0119] FIG2 is a schematic diagram of a PPDU frame structure provided in an embodiment of the present application;

[0120] FIG3 is a schematic diagram of a channel distribution of a 320 MHz bandwidth provided in an embodiment of the present application;

[0121] FIG4 is a schematic diagram of a frame structure of an EHT PPDU provided in an embodiment of the present application;

[0122] FIG5 is a flowchart of an information transmission method provided in an embodiment of the present application;

[0123] FIG6 is a schematic diagram of a PAPR simulation result provided in an embodiment of the present application;

[0124] FIG7 is a schematic diagram of another PAPR simulation result provided in an embodiment of the present application;

[0125] FIG8 is a schematic diagram of another PAPR simulation result provided in an embodiment of the present application;

[0126] FIG9 is a schematic diagram of another PAPR simulation result provided in an embodiment of the present application;

[0127] FIG10 is a schematic diagram of another PAPR simulation result provided in an embodiment of the present application;

[0128] FIG11 is a schematic diagram of another PAPR simulation result provided in an embodiment of the present application;

[0129] FIG12 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0130] FIG13 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0131] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit them to be necessarily different.

[0132] In this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0133] It should be understood that the embodiments of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, and future 5G communication system, and system using IEEE 802.11 standard. Exemplary IEEE 802.11 standard includes but is not limited to: 802.11be standard, or the next generation 802.11 standard.

[0134] The following embodiments are mainly described from the perspective of a communication system using the 802.11 standard. The technical solution of this application is applicable to scenarios including: communication between access points (AP) and stations (STA), communication between APs, and communication between STAs.

[0135] Among them, the access point can be an access point for terminal devices (such as mobile phones) to enter the wired (or wireless) network. It is mainly deployed in homes, buildings and campuses, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. The access point is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to the Ethernet. Specifically, the access point can be a terminal device (such as a mobile phone) or a network device (such as a router) with a wireless fidelity (Wi-Fi) chip. The access point can be a device that supports the 802.11be standard. The access point can also be a device that supports various wireless local area network (WLAN) standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a. The access point in this application may be a high efficiency (HE) AP or an extremely high throughput (EHT) AP, and may also be an access point applicable to a future generation of Wi-Fi standards.

[0136] A station can be a wireless communication chip, a wireless sensor, or a wireless communication terminal, and can also be referred to as a user device. For example, a station can be a mobile phone that supports Wi-Fi communication, a tablet 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, an in-vehicle communication device that supports Wi-Fi communication, or a computer that supports Wi-Fi communication, etc. Optionally, the station can support the 802.11be standard. The station can also support various wireless local area network (WLAN) standards in the 802.11 family, such as 802.11be, 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0137] For example, access points and sites can be devices used in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras and smart remote controls in smart homes, smart water and electricity meters, and sensors in smart cities.

[0138] The embodiments of the present application can be illustrated by taking the communication between AP and STA as an example. As shown in Figure 1, wireless communication is performed between AP and STA1 and STA2. It should be understood that the method described in the embodiments of the present application is also applicable to communication between AP and AP, and communication between STA and STA, etc.

[0139] The AP and STA in the embodiments of the present application may structurally include a media access control (MAC) layer and a physical (PHY) layer. The AP and STA may transmit information via a physical layer protocol data unit (PPDU). When the AP and STA use different wireless communication protocols, the PPDU frame structure may also vary.

[0140] For example, when the wireless communication protocol used by the AP and STA is 802.11a, as shown in Figure 2, the PPDU frame structure includes the legacy short training sequence field (L-STF), the legacy long training sequence field (L-LTF), the legacy signaling field (L-SIG), and the data field. It should be noted that the L-STF, L-LTF, and L-SIG in the above fields can be called legacy preamble codes. The above fields can also be called domains.

[0141] It should be noted that the PPDU frame structure in the above 802.11a does not limit the embodiments of the present application. That is, the PPDU frame structure provided in the embodiments of the present application may be the same as or different from the frame structure shown in FIG2.

[0142] 802.11a is the first generation Wi-Fi standard to use OFDM modulation. It supports a maximum system bandwidth of 20 MHz and includes 52 OFDM subcarriers, 48 ​​of which are used for data transmission and 4 are pilot subcarriers. The maximum transmission rate is only 54 Mbps. Therefore, data transmission using the 802.11a standard is called non-HT transmission.

[0143] Later, the 802.11n standard was developed, significantly improving Wi-Fi's maximum transmission rate. Hence, 802.11n is also known as the high-throughput (HT) WLAN standard. This standard is compatible with the previous-generation 802.11a standard, meaning that HT devices can communicate with non-HT devices in a non-HT manner. Because the 802.11n standard supports a maximum bandwidth of 40 Mbps, transmitting the same signal simultaneously over two 20 Mbps channels in a non-HT manner would result in a significant PAPR. Therefore, the 802.11 standard applies a 90-degree phase rotation to the subcarriers within the higher-frequency 20 Mbps, multiplying each subcarrier in the upper half of the bandwidth by the unit imaginary number j.

[0144] The later 802.11ac and 802.11ax standards further expanded the bandwidth to 80M and 160M, respectively. The new generation of standards is still compatible with traditional 802.11a devices, so it can send data simultaneously on more 20M sub-channels in a non-HT manner. To reduce the high PAPR problem caused by sending the same signal on multiple channels simultaneously, the standards define the rotation coefficients corresponding to the carrier on each 20M sub-channel at 80M and 160M, respectively. Specifically, when sending at 80M bandwidth, the rotation coefficients corresponding to the four 20M sub-channels are 1, -1, -1, -1, respectively. When sending at 160M bandwidth, the rotation coefficients corresponding to the eight 20M sub-channels are 1, -1, -1, -1, -1, -1, respectively.

[0145] The next-generation 802.11EHT standard supports a maximum bandwidth of 320 Mbps. To maintain compatibility with legacy devices, some management frames, such as RTS, CTS, and NDPA frames, will continue to be sent using non-HT transmission. With a 320 Mbps bandwidth, the industry needs to design rotation coefficients for the subcarriers on the 16 20 Mbps subchannels when using non-HT transmission. Furthermore, because the next-generation 802.11 standard supports channel puncturing, some subchannels within the 320 Mbps bandwidth may be punctured and no data may be transmitted. This makes the design of rotation coefficients for the 320 Mbps bandwidth more difficult.

[0146] For example, when the bandwidth is 320 MHz, the channel distribution can be shown in Figure 3. The 320 MHz channel can be divided into 16 20 MHz channels. These 16 20 MHz channels can be numbered sequentially from high frequency to low frequency, or from low frequency to high frequency. For example, in Figure 3, channel 1 can be used as the primary 20 MHz channel, channel 2 can be used as the secondary 20 MHz channel, channels 1 and 2 can be aggregated into a primary 40 MHz channel, channels 3 and 4 can be aggregated into a secondary 40 MHz channel, channels 1-channel 4 can be aggregated into a primary 80 MHz channel, channels 5-channel 8 can be aggregated into a secondary 80 MHz channel, channels 1-channel 8 can be aggregated into a primary 160 MHz channel, and channels 9-channel 16 can be aggregated into a secondary 160 MHz channel. It is worth noting that the primary 20MHz channel is not necessarily located in the first 20MHz. For example, channel 3 can be used as the primary 20MHz channel, channel 4 can be used as the secondary 20MHz channel, channels 3 and 4 can be aggregated into a primary 40MHz channel, channels 1 and 2 can be aggregated into a secondary 40MHz channel, channels 1-4 can be aggregated into a primary 80MHz channel, channels 5-8 can be aggregated into a secondary 80MHz channel, channels 1-8 can be aggregated into a primary 160MHz channel, and channels 9-16 can be aggregated into a secondary 160MHz channel. Secondary channels can also have other names, such as slave channels, auxiliary channels, etc., but the embodiments of the present application are not limited thereto.

[0147] As shown in Figure 4, the frame structure of an extremely high throughput (EHT) PPDU in the 802.11be standard may include an L-STF, L-LTF, L-SIG, a repeated L-SIG (RL-SIG), a universal signaling field (U-SIG), an EHT-SIG, an EHT-STF, an EHT-LTF, a data field, and a packet expansion (PE) field.

[0148] The L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG included in the EHT PPDU are transmitted in duplicate in units of 20 MHz.

[0149] The non-HT duplication transmission mode refers to duplicating and transmitting all fields of the non-HT format PPDU in units of 20 MHz over a bandwidth greater than 20 MHz. There are some differences between duplicating and transmitting some fields of the PPDU in units of 20 MHz and the non-HT duplication transmission mode. For example, in the non-HT duplication transmission mode, some fields of the EHT PPDU are duplicated and transmitted in units of 20 MHz, with the following characteristics: (1) The rate of the L-SIG field in the EHT PPDU is a fixed value, and the length value is set in a special way to distinguish the protocol version; (2) For the EHT PPDU, the -28, -27, 27, and 28 subcarriers of the L-SIG and RL-SIG in each 20 MHz subchannel are no longer 0, but are fixed to [-1, -1, -1, 1]; (3) For the EHT PPDU, the -28, -27, 27, and 28 subcarriers of the U-SIG and EHT-SIG in each 20 MHz channel are no longer 0, but are used to transmit additional information.

[0150] Because the L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG included in the EHT PPDU are replicated and transmitted every 20 MHz, the EHT premodulation field of the EHT PPDU also suffers from a high PAPR problem. Therefore, to reduce the PAPR of these fields, the related art provides a rotation factor sequence of [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1,1]. However, this rotation factor sequence does not effectively reduce the PAPR of these fields.

[0151] It can be seen that the industry urgently needs a solution that can effectively reduce the PAPR of part or all fields of the 320 MHz bandwidth PPDU.

[0152] In this regard, an embodiment of the present application provides an information transmission method. As shown in FIG5 , the method includes the following steps:

[0153] S101. A transmitting device generates a PPDU with a bandwidth of 320 MHz.

[0154] In one possible design, the 320 MHz bandwidth may be a 320 MHz bandwidth in a non-puncturing mode, in which case the actual transmission bandwidth used by the transmitting device is 320 MHz.

[0155] In another possible design, the 320 MHz bandwidth may be a 320 MHz bandwidth in a puncturing mode, and thus the 320 MHz bandwidth is also referred to as a nominal 320 MHz bandwidth. In this case, the actual transmission bandwidth used by the transmitting device is less than 320 MHz.

[0156] The PPDU may be a non-HT format PPDU, an EHT PPDU, or other types of PPDUs, which are not limited in the embodiments of the present application.

[0157] In an embodiment of the present application, PPDU can adopt any one of a variety of modulation methods, such as binary phase shift keying (BPSK) modulation, quadrature phase shift keying (QPSK) modulation, 16-quadrature amplitude modulation (QAM) modulation, 64QAM modulation, etc.

[0158] Optionally, all fields of the PPDU may be replicated and transmitted in a non-HT manner over the 320 MHz bandwidth.

[0159] For example, when the PPDU is a clear to send (CTS) frame, a ready to send (RTS) frame, or a null data packet announcement (NDPA) frame, all fields of the PPDU (including the preamble field and the data field) are copied and transmitted in a non-HT manner.

[0160] Optionally, some fields of the PPDU can be replicated and transmitted in units of 20 MHz on the above-mentioned 320 MHz bandwidth. Exemplarily, some fields of the PPDU can be premodulation fields. The premodulation field is used to carry information that can be interpreted by all devices. For example, for the target receiving end, the target receiving end can obtain information such as the coding modulation method and length of subsequent fields of the PPDU through the premodulation field of the PPDU, which facilitates the interpretation of subsequent data. For devices other than the target receiving end, other devices can use the premodulation field of the PPDU to understand whether the channel is occupied by others and the expected occupation time, so as to reasonably back off to avoid congestion.

[0161] For example, some fields of the PPDU may include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, or EHT-SIG. It should be understood that as wireless technology evolves, some fields of the PPDU may also include new fields included in the next-generation format PPDU.

[0162] For example, if the PPDU is an EHT PPDU, the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG included in the PPDU are transmitted in duplicate in units of 20 MHz over a 320 MHz bandwidth.

[0163] The following describes two methods for reducing the PAPR of PPDUs with a 320 MHz bandwidth. It should be understood that Method 1 is described from the perspective of the frequency band (e.g., 20 MHz), while Method 2 is described from the perspective of subcarriers. Methods 1 and 2 share the same conceptual approach.

[0164] Method 1: Some or all of the fields in the PPDU are rotated using a rotation factor sequence within a 320 MHz bandwidth. The 320 MHz bandwidth may include n X MHz, and the rotation factor sequence may include n rotation factors, such that each rotation factor corresponds to an X MHz. Exemplarily, X MHz may be 20 MHz, 40 MHz, etc., without limitation.

[0165] It should be understood that one or more of the n X MHz bands may be punctured, that is, one or more of the n X MHz bands may not be used to carry signals. Based on this, the above 320 MHz bandwidth is the 320 MHz bandwidth using the puncturing mode.

[0166] For example, a 320 MHz bandwidth may include 16 20 MHz segments, and a rotation factor sequence may include 16 selection factors, such that each rotation factor corresponds to a 20 MHz segment. It should be understood that when a puncturing pattern is used in the 320 MHz bandwidth, one or more of the 16 20 MHz segments may be punctured, and the rotation factors corresponding to the punctured 20 MHz segments in the rotation factor sequence are not used.

[0167] The rotation of some or all fields of the PPDU using a rotation factor sequence over a 320 MHz bandwidth may include: rotating some fields of the PPDU using a rotation factor sequence over a 320 MHz bandwidth, and not rotating other fields other than the some fields using a rotation factor sequence over an X MHz bandwidth; or rotating all fields of the PPDU using a rotation factor sequence over a 320 MHz bandwidth.

[0168] Alternatively, some or all fields of the PPDU are rotated using a rotation factor sequence over a 320 MHz bandwidth, which can be understood as: each field in some or all fields of the PPDU is rotated using a rotation factor sequence over a 320 MHz bandwidth, that is, each field in some fields of the PPDU is rotated using a rotation factor sequence over 16 20 MHz, or each field in all fields of the PPDU is rotated using a rotation factor sequence over 16 20 MHz.

[0169] Optionally, the fields in the PPDU that need to be rotated using the rotation factor sequence may be fields that are replicated and transmitted every 20 MHz over the 320 MHz bandwidth. For example, if all fields of the PPDU are replicated and transmitted every 20 MHz over the 320 MHz bandwidth in non-HT mode, then all fields of the PPDU are rotated using the rotation factor sequence every 20 MHz over the 320 MHz bandwidth. For another example, if some fields of the PPDU are replicated and transmitted every 20 MHz over the 320 MHz bandwidth, then some fields of the PPDU are rotated using the rotation factor sequence over the 320 MHz bandwidth.

[0170] Optionally, when the transmitting end device generates the 320 MHz bandwidth PPDU, for some or all of the fields in the PPDU, the frequency domain signal corresponding to the part or all of the fields carried on each X MHz of the n X MHz included in the X MHz bandwidth may be multiplied by the rotation factor corresponding to the Y MHz, that is, the product of the frequency domain signal corresponding to the part or all of the field and the rotation factor sequence is obtained, and then the product is inverse Fourier transform (IFFT) performed on the product to obtain the time domain signal corresponding to the part or all of the field.

[0171] For example, assuming that the frequency domain signal corresponding to some or all of the fields is [X1, X2, ..., Xn], the n rotation factors are [K1, K2, ..., Kn], Y1 to Yn respectively represent the frequency domain signals corresponding to n X MHz, and K1 to Kn respectively represent the rotation factors corresponding to the n X MHz. Then, the product of the frequency domain signal corresponding to some or all of the fields and the rotation factor sequence can be expressed as [X1*K1, X2*K2, ..., Xn*Kn], and the time domain signal corresponding to some or all of the fields can be expressed as IFFT[X1*K1, X2*K2, ..., Xn*Kn].

[0172] Accordingly, when calculating the PAPR of the part or all of the field according to the time domain signal corresponding to the part or all of the field, the time domain signal corresponding to the part or all of the field may be oversampled to obtain an analog domain signal. For example, 5 times oversampling is used. Assuming that the time domain signal after oversampling is S i , the PAPR can be calculated by the following formula, where max means the maximum value and mean means the average value.

[0173]

[0174] In the embodiment of the present application, if a field carried on a certain X MHz is multiplied by a rotation factor other than 1, it is defined that the field on the X MHz is rotated.

[0175] Optionally, the rotation factors in the rotation factor sequence may have a value range of 1, -1, j, or -j, where a rotation factor of 1 corresponds to a rotation angle of 0 degrees, a rotation factor of -1 corresponds to a rotation angle of 180 degrees, a rotation factor of j corresponds to a rotation angle of 90 degrees, and a rotation factor of -j corresponds to a rotation angle of -90 degrees. It should be understood that the value range of the rotation factors may be limited to the set {1, -1, j, -j}, which facilitates simple device implementation and reduces device complexity.

[0176] Optionally, for a scenario where X MHz is 20 MHz, the rotation factor sequence may be designed as follows:

[0177] In Design 1, the rotation factor sequence can be the target sequence; alternatively, the rotation factor sequence can be a sequence obtained by performing a target operation on the target sequence. The target operation can be one or more of the following: global inversion, reverse order, or alternating inversion.

[0178] Optionally, based on Design 1, the target sequence can be one of the following:

[0179] [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1]; or,

[0180] [1,1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,1]; or,

[0181] [1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1]; or,

[0182] [1,1,1,1,1,-1,1,-1,-1,-1,1,1,1,-1,-1]; or,

[0183] [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,-1,-1]; or,

[0184] [1,1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,-1,-1]; or,

[0185] [1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1,1].

[0186] In this case, global inversion refers to the inversion of every element in the sequence. For example, assuming the original sequence is [1, -1, 1, 1, 1], the sequence obtained by global inversion is [-1, 1, -1, -1, -1].

[0187] Reverse sorting means rearranging the elements in a sequence from highest to lowest order. For example, suppose the original sequence is [1, -1, 1, 1, 1], and the sequence after reverse sorting is [1, 1, 1, -1, 1].

[0188] There are two ways to implement alternating inversion: Method 1: Invert each even-numbered element in the sequence. For example, assuming the original sequence is [1, -1, 1, 1, 1], the sequence obtained by alternating the inversion of the even-numbered elements in the sequence is [1, 1, 1, -1, 1]. Method 2: Invert each odd-numbered element in the sequence. For example, assuming the original sequence is [1, -1, 1, 1, 1], the sequence obtained by alternating the inversion of the odd-numbered elements in the sequence is [-1, -1, -1, 1, -1].

[0189] It should be understood that first performing alternating inversion of even-numbered items in a sequence and then performing overall inversion is equivalent to performing inversion of odd-numbered items in the sequence.

[0190] Design 2: The rotation factor sequence may be the target sequence; or, the rotation factor sequence may be a sequence obtained by completely inverting the target sequence.

[0191] Optionally, based on Design 2, the target sequence can be one of the following:

[0192] [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0193] [1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,1,1].

[0194] It should be understood that, in the case of an 80MHz bandwidth, the relevant art defines the rotation coefficients of the four 20MHz subchannels within the 80MHz as [1,-1,-1,-1]. Considering the 320MHz channel as four 80MHz subchannels, based on the [1,-1,-1,-1] given in the relevant art, rotating the four 80MHz channels at different phases yields an equivalent sequence of 16 20MHz rotation factors (also known as the rotation factor sequence provided in Design 2). Therefore, the rotation factor sequence provided in Design 2 is obtained by rotating in units of 80MHz and will not affect the channel smoothing operations performed by the receiving device on the 80MHz subchannel content.

[0195] For example, in combination with the above-mentioned Design 1 and Design 2, Table 1 shows possible implementations of the rotation factor sequence. It should be understood that a row in Table 1 corresponds to one implementation of the rotation factor sequence.

[0196] Table 1

[0197]

[0198]

[0199]

[0200] Among them, the rotation factor sequences of sequence numbers 2-8 in Table 1 are obtained by performing a target operation on the rotation factor sequence of sequence number 1; the rotation factor sequences of sequence numbers 10-16 are obtained by performing a target operation on the rotation factor sequence of sequence number 9; the rotation factor sequences of sequence numbers 18-24 are obtained by performing a target operation on the rotation factor sequence of sequence number 17; the rotation factor sequences of sequence numbers 26-32 are obtained by performing a target operation on the rotation factor sequence of sequence number 25; the rotation factor sequences of sequence numbers 34-40 are obtained by performing a target operation on the rotation factor sequence of sequence number 33; the rotation factor sequences of sequence numbers 42-48 are obtained by performing a target operation on the rotation factor sequence of sequence number 41; the rotation factor sequences of sequence numbers 50-56 are obtained by performing a target operation on the rotation factor sequence of sequence number 49; the rotation factor sequence of sequence number 58 is obtained by performing a global inversion on the rotation factor sequence of sequence number 57; and the rotation factor sequence of sequence number 60 is obtained by performing a global inversion on the rotation factor sequence of sequence number 59.

[0201] It should be understood that the sequence obtained by performing overall inversion, alternating inversion and / or reverse order arrangement on the target sequence has the same effect as the target sequence in reducing PAPR.

[0202] For example, Table 2 gives the simulation results of the rotation factor sequences of sequence numbers 1, 9, 17, 25, 33, 41, 49, 57, and 59 in Table 1 and the rotation factor sequence [1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1, -1, 1, 1] given in the related art.

[0203] For the rotation factor sequences 1, 9, 17, 25, 33, 41, 49, 57, and 59 in Table 1 and the rotation factor sequences [1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, 1, 1] given in the related art, the second column of Table 2 shows the median PAPR for each rotation factor sequence when applied to a 320 MHz bandwidth PPDU in non-punctured mode; the third column of Table 2 shows the median worst-case PAPR for each rotation factor sequence when applied to a 20 MHz bandwidth PPDU in 20 MHz bandwidth mode; and the fourth column of Table 2 shows the median worst-case PAPR for each rotation factor sequence when applied to a 20 MHz bandwidth PPDU in 40 MHz bandwidth mode. It should be understood that the median PAPR above refers to the median of multiple PAPRs calculated through simulation for a PPDU carrying random content using BPSK modulation.

[0204] For a 320 MHz bandwidth, there are 16 20 MHz puncturing patterns. Therefore, for the 20 MHz bandwidth pattern, the worst PAPR is the worst PAPR among the 16 PAPRs corresponding to the 16 20 MHz puncturing patterns.

[0205] For a 320 MHz bandwidth, there are eight 40 MHz puncturing patterns. Therefore, for the 40 MHz bandwidth mode, the worst PAPR is the worst PAPR among the eight PAPRs corresponding to the eight 40 MHz puncturing patterns.

[0206] Table 2

[0207]

[0208] It should be understood that the larger the PAPR value of the PPDU, the less effective the rotation factor sequence is in reducing the PAPR. It can be seen that compared with the rotation factor sequence provided in the related art, the rotation factor sequence provided in the embodiment of the present application can more effectively reduce the PAPR.

[0209] The following figures compare the effects of rotation factor sequences 1 and 57 with those in related art. Figures 6-11 illustrate PAPR simulation results. In Figures 6-11, the horizontal axis represents PAPR, and the vertical axis represents the corresponding cumulative distribution function (CDF). Thus, Figures 6-11 illustrate the probability distribution characteristics of PAPR corresponding to different rotation factor sequences.

[0210] In Figures 6 to 11, Seq1 represents the rotation factor sequence of sequence number 1, Seq57 represents the rotation factor sequence of sequence number 57, and Prior art Seq is the rotation factor sequence provided by the related art [1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1,-1,1,1].

[0211] The simulation results shown in Figure 6 are for the scenario where the PPDU adopts the BPSK modulation method and the 320MHz bandwidth is not punctured. The simulation results shown in Figure 7 are for the scenario where the PPDU adopts the QPSK modulation method and the 320MHz bandwidth is not punctured. The simulation results shown in Figure 8 are for the scenario where the PPDU adopts the BPSK modulation method and the 320MHz bandwidth adopts a 20MHz puncturing pattern. The simulation results shown in Figure 9 are for the scenario where the PPDU adopts the QPSK modulation method and the 320MHz bandwidth adopts a 20MHz puncturing pattern. The simulation results shown in Figure 10 are for the scenario where the PPDU adopts the BPSK modulation method and the 320MHz bandwidth adopts a 40MHz puncturing pattern. The simulation results shown in Figure 11 are for the scenario where the PPDU adopts the QPSK modulation method and the 320MHz bandwidth adopts a 40MHz puncturing pattern.

[0212] Regarding the rotation factor sequences of sequence numbers 1 and 57 and the rotation factor sequences in the related art, it can be seen from Figures 6 to 11 that the rotation factor sequence of sequence number 1 can most effectively reduce the PAPR of the PPDU with a bandwidth of 320 MHz, and the rotation factor sequence of sequence number 57 can secondarily effectively reduce the PAPR of the PPDU with a bandwidth of 320 MHz. The rotation factor sequence provided by the related art cannot effectively reduce the PAPR of the PPDU with a bandwidth of 320 MHz.

[0213] Method 2: The subcarriers in the 320 MHz bandwidth used to carry part or all of the fields of the PPDU are rotated according to the rotation factor.

[0214] Optionally, in a scenario where all fields of the PPDU are replicated and transmitted in a non-HT manner, the subcarriers carrying all fields of the PPDU are rotated according to the rotation factor.

[0215] Optionally, in a scenario where some fields of the PPDU are replicated and transmitted in units of 20 MHz, the subcarriers carrying some fields of the PPDU are rotated according to the rotation factor.

[0216] For example, the correspondence between subcarriers and rotation factors can be shown in Table 1. In Table 1, the first rotation factor in the rotation factor sequence corresponds to a subcarrier that meets the condition k < -448; the second rotation factor corresponds to a subcarrier that meets the condition -448 ≤ k < -384; the third rotation factor corresponds to a subcarrier that meets the condition -384 ≤ k < -320; the fourth rotation factor corresponds to a subcarrier that meets the condition -320 ≤ k < -256; the fifth rotation factor corresponds to a subcarrier that meets the condition -256 ≤ k < -192; the sixth rotation factor corresponds to a subcarrier that meets the condition -192 ≤ k < -128; the seventh rotation factor corresponds to a subcarrier that meets the condition -128 ≤ k < -64; the eighth rotation factor corresponds to a subcarrier that meets the condition -6 The ninth rotation factor corresponds to a subcarrier meeting the condition of 0≤k<64; the tenth rotation factor corresponds to a subcarrier meeting the condition of 64≤k<128; the eleventh rotation factor corresponds to a subcarrier meeting the condition of 128≤k<192; the twelfth rotation factor corresponds to a subcarrier meeting the condition of 192≤k<256; the thirteenth rotation factor corresponds to a subcarrier meeting the condition of 256≤k<320; the fourteenth rotation factor corresponds to a subcarrier meeting the condition of 320≤k<384; the fifteenth rotation factor corresponds to a subcarrier meeting the condition of 384≤k<448; and the sixteenth rotation factor corresponds to a subcarrier meeting the condition of k≥448. Where k is the subcarrier number.

[0217] It should be understood that the correspondence between the subcarriers and the rotation factors can be expressed not only in a table but also in a formula.

[0218] The following examples use formulas to represent some of the rotation factor sequences in Table 1. It should be understood that other rotation factor sequences in Table 1 can also be represented by reference to the following formulas. The following formulas are merely examples, and variations of the following formulas are also within the scope of protection of the embodiments of this application.

[0219] For example, for the rotation factor sequence of sequence number 1 in Table 1, the correspondence between the subcarrier and the rotation factor can be shown in formula (1-1).

[0220]

[0221] Optionally, the above formula (1-1) can be transformed into formula (1-2).

[0222]

[0223] Among them, γ k,320M Indicates the rotation factor corresponding to the subcarrier numbered k in the 320 MHz bandwidth.

[0224] For example, for the rotation factor sequence numbered 9 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (2-1).

[0225]

[0226] Optionally, the above formula (2-1) can be transformed into the following formula (2-2).

[0227]

[0228] For example, for the rotation factor sequence numbered 17 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (3-1).

[0229]

[0230] Optionally, the above formula (3-1) can be transformed into the following formula (3-2).

[0231]

[0232] For example, for the rotation factor sequence numbered 25 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (4-1).

[0233]

[0234] Optionally, the above formula (4-1) can be transformed into the following formula (4-2).

[0235]

[0236] For example, for the rotation factor sequence numbered 33 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (5-1).

[0237]

[0238] Optionally, the above formula (5-1) can be transformed into the following formula (5-1).

[0239]

[0240] For example, for the rotation factor sequence numbered 41 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (6-1).

[0241]

[0242] Optionally, the above formula (6-1) can be transformed into the following formula (6-2).

[0243]

[0244] For example, for the rotation factor sequence numbered 49 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (7-1).

[0245]

[0246] Optionally, the above formula (7-1) can be transformed into the following formula (7-2).

[0247]

[0248] For example, for the rotation factor sequence numbered 57 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (8-1).

[0249]

[0250] Optionally, the above formula (8-1) can be transformed into the following formula (8-2).

[0251]

[0252] For example, for the rotation factor sequence numbered 59 in Table 1, the correspondence between the subcarrier and the rotation factor can be as shown in formula (9-1).

[0253]

[0254] Optionally, the above formula (9-1) can be transformed into the following formula (9-2).

[0255]

[0256] S102: The transmitting device sends a PPDU to the receiving device. Correspondingly, the receiving device receives the PPDU sent by the transmitting device.

[0257] Optionally, when all fields of the PPDU are transmitted in a non-HT copy manner, the receiving end receives all fields of the PPDU in a non-HT copy manner.

[0258] Optionally, when some fields of the PPDU are transmitted in duplicate every 20 MHz, the receiving end receives some fields of the PPDU in units of 20 MHz. It should be understood that for fields in the PPDU that are not transmitted in duplicate every 20 MHz, the receiving end receives them with a 320 MHz bandwidth.

[0259] S103: The receiving device parses the PPDU.

[0260] As a possible implementation manner, the receiving device can rotate and recover part or all of the fields of the received PPDU on the 320 MHz bandwidth according to the rotation recovery factor sequence corresponding to the rotation factor sequence to obtain the PPDU before rotation.

[0261] The rotation factors in the rotation factor sequence correspond one-to-one to the rotation recovery factors in the rotation recovery factor sequence, and the product of the rotation factors and their corresponding rotation recovery factors is 1.

[0262] For example, when the rotation factor corresponding to the 20MHz used by the transmitting device is 1, the rotation recovery factor of the receiving device during rotation recovery can be 1; when the rotation factor corresponding to the 20MHz used by the transmitting device is -1, the rotation recovery factor of the receiving device during rotation recovery can be -1; when the rotation factor corresponding to the 20MHz used by the transmitting device is -j, the rotation recovery factor of the receiving device during rotation recovery can be j; when the rotation factor corresponding to the 20MHz used by the transmitting device is j, the rotation recovery factor of the receiving device during rotation recovery can be -j.

[0263] As another possible implementation method, the receiving device can rotate and recover the subcarriers used to carry part or all of the fields of the PPDU according to the rotation recovery factor to obtain the PPDU before rotation, and the product of the subcarrier rotation factor and the subcarrier rotation recovery factor is 1.

[0264] Exemplarily, for each subcarrier of the 320MHz bandwidth, the receiving device may also perform rotation recovery by multiplying it by a rotation recovery factor. For example, when the rotation factor corresponding to the subcarrier used by the transmitting device is 1, the rotation recovery factor corresponding to the rotation recovery of the receiving device may be 1; when the rotation recovery factor corresponding to the subcarrier used by the transmitting device is -1, the rotation recovery factor corresponding to the rotation recovery of the receiving device may be -1; when the rotation factor corresponding to the subcarrier used by the transmitting device is -j, the rotation recovery factor corresponding to the rotation recovery of the receiving device may be j; when the rotation factor corresponding to the subcarrier used by the transmitting device is j, the rotation recovery factor corresponding to the rotation recovery of the receiving device may be -j.

[0265] As another possible implementation, the receiving device directly regards the rotation factor as part of the channel, and removes the rotation factor through channel estimation and channel equalization to obtain the PPDU before rotation.

[0266] Based on the rotation factor sequence provided in the embodiment of the present application, the PAPR of the PPDU with a bandwidth of 320 MHz can be effectively reduced.

[0267] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. It is understandable that, in order to realize the above functions, the communication device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0268] The embodiment of the present application can divide the functional modules of the device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function:

[0269] As shown in Figure 12, an embodiment of the present application provides a communication device, which includes a processing module 101 and a communication module 102. It should be understood that when the communication device is a transmitting device, or when the communication device is applied to a transmitting device, it has any of the functions of the transmitting device in the above-mentioned method. When the communication device is a receiving device, or when the communication device is applied to a receiving device, it has any of the functions of the receiving device in the above-mentioned method.

[0270] Exemplarily, the communication apparatus is a transmitting end device, or the communication apparatus is applied to a transmitting end device, the processing module 101 is used to execute step S101 in FIG. 5 , and the communication module 102 is used to execute step S102 in FIG. 5 .

[0271] Exemplarily, the communication apparatus is a receiving device, or the communication apparatus is applied to a receiving device, the communication module 102 is used to execute step S102 in FIG. 5 , and the processing module 101 is used to execute step S103 in FIG. 5 .

[0272] The following describes possible product forms of the communication device. It should be understood that any product with the characteristics of a communication device falls within the scope of protection of this application. It should also be understood that the following description is merely illustrative and does not limit the product forms of the communication device of the embodiments of this application to these examples.

[0273] FIG13 is a structural diagram of a possible product form of the communication device described in an embodiment of the present application.

[0274] As a possible product form, the communication apparatus described in the embodiment of the present application may be a communication device, which includes a processor 201 and a transceiver 202. Optionally, the communication device further includes a memory 203.

[0275] When the communication apparatus is a transmitting end device, the processor 201 is used to execute step S101 in FIG. 5 , and the transceiver 202 is used to execute step S102 in FIG. 5 .

[0276] When the communication device is a receiving end device, the transceiver 202 is used to execute step S102 in FIG5, and the processor 201 is used to execute step S103 in FIG5.

[0277] As another possible product form, the communication device described in the embodiment of the present application can also be implemented by a chip. The chip includes: a processing circuit 201 and a transceiver pin 202. Optionally, the chip can also include a storage medium 203.

[0278] As another possible product form, the communication device described in the embodiments of the present application can also be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout this application.

[0279] Optionally, an embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the communication method in the aforementioned method embodiment.

[0280] Optionally, an embodiment of the present application further provides a computer program product comprising computer instructions, which, when executed on a computer, enables the computer to execute the communication method in the aforementioned method embodiment.

[0281] It should be understood that the computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (e.g., a solid-state drive).

[0282] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0283] It should be understood that the devices and methods disclosed in the several embodiments provided in this application can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0284] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0285] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0286] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application.

[0287] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An information transmission method, characterized in that, The method includes: Generating a Physical Layer Protocol Data Unit (PPDU) with a 320 MHz bandwidth, where some or all fields of the PPDU are rotated on the 320 MHz bandwidth by a rotation factor sequence. The 320 MHz bandwidth includes 16 20 MHz, and the rotation factor sequence includes 16 rotation factors, with each 20 MHz corresponding to one rotation factor; Transmitting the PPDU.

2. The method according to claim 1, characterized in that, All fields of the PPDU are transmitted in a non-high throughput non-HT replication manner.

3. The method according to claim 2, characterized in that, All fields of the PPDU are rotated by the rotation factor sequence.

4. The method according to claim 1, characterized in that, Some fields of the PPDU are replicated and transmitted in units of every 20 MHz.

5. The method according to claim 4, characterized in that, Some fields of the PPDU are rotated by the rotation factor sequence.

6. The method according to claim 4 or 5, characterized in that, Some fields of the PPDU include one or more of the following fields: Legacy Short Training Field (L-STF), Legacy Long Training Field (L-LTF), Legacy Signaling Field (L-SIG), Repeated Legacy Signaling Field (RL-SIG), Universal Signaling Field (U-SIG), or Extremely High Throughput Signaling Field (EHT-SIG).

7. The method according to any one of claims 1 to 6, characterized in that, The rotation factor sequence is a target sequence; or, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, and the target operation includes one or more of the following: overall negation, reverse order arrangement, or alternating negation.

8. The method according to claim 7, characterized in that, The target sequence is one of the following: [1,1,1,1,1,-1,1,1,-1,-1,-1,1,1,-1,1,-1]; or, [1,1,1,-1,-1,-1,-1,1,-1,-1,1,1,-1,1,-1,1]; or, [1,1,1,1,-1,-1,-1,-1,1,-1,1,-1,-1,1,1,-1]; or, [1,1,1,1,1,-1,1,-1,1,-1,-1,1,1,1,-1,-1]; or, [1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,1,-1,-1]; or, [1,1,1,1,1,-1,-1,-1,1,-1,1,-1,-1,1,-1,-1]; or, [1,1,1,-1,-1,-1,1,-1,-1,-1,1,-1,1,1,-1,1]。 9. The method according to any one of claims 1 to 6, characterized in that, The rotation factor sequence is a target sequence; or, the rotation factor sequence is a sequence obtained by performing overall negation on the target sequence.

10. The method according to claim 9, characterized in that, The target sequence is one of the following: [1,-1,-1,-1,1,-1,-1,-1,1,-1,-1,-1,-1,1,1,1]; or, [1,-1,-1,-1,-1,1,1,1,-1,1,1,1,-1,1,1,1]。 11. An information transmission method, characterized in that, The method includes: Receiving a Physical Layer Protocol Data Unit (PPDU) with a 320 MHz bandwidth, where some or all fields of the PPDU are rotated on the 320 MHz bandwidth by a rotation factor sequence. The 320 MHz bandwidth includes 16 20 MHz, and the rotation factor sequence includes 16 rotation factors, with each 20 MHz corresponding to one rotation factor; Parsing the PPDU.

12. The method according to claim 11, characterized in that, The parsing of the PPDU includes: According to the rotation recovery factor sequence corresponding to the rotation factor sequence, perform rotation recovery on some or all fields of the PPDU in the 320 MHz bandwidth to obtain the PPDU before rotation.

13. The method according to claim 11 or 12, characterized in that, All fields of the PPDU are received in a non-HT replication manner.

14. The method according to claim 13, wherein, All fields of the PPDU are rotated by the rotation factor sequence.

15. The method according to claim 11 or 12, wherein, Some fields of the PPDU are replicated and received in units of every 20 MHz.

16. The method according to claim 15, wherein, Some fields of the PPDU are rotated by the rotation factor sequence.

17. The method according to claim 15 or 16, wherein, Some fields of the PPDU include one or more of the following fields: traditional short training field L-STF, traditional long training field L-LTF, traditional signaling field L-SIG, repeated traditional signaling field RL-SIG, general signaling field U-SIG, or extremely high throughput signaling field EHT-SIG.

18. The method according to any one of claims 11 to 17, wherein, The rotation factor sequence is a target sequence; or, the rotation factor sequence is a sequence obtained by performing a target operation on the target sequence, and the target operation includes one or more of the following: overall inversion, reverse order arrangement, or alternating inversion.

19. The method according to claim 18, wherein, The target sequence is one of the following: [1, 1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1]; or, [1, 1, 1, -1, -1, -1, -1, 1, -1, -1, 1, 1, -1, 1, -1, 1]; or, [1, 1, 1, 1, -1, -1, -1, -1, 1, -1, 1, -1, -1, 1, 1, -1]; or, [1, 1, 1, 1, 1, -1, 1, -1, 1, -1, -1, 1, 1, 1, -1, -1]; or, [1, 1, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, 1, 1, -1, -1]; or, [1, 1, 1, 1, 1, -1, -1, -1, 1, -1, 1, -1, -1, 1, -1, -1]; or, [1,1,1,-1,-1,-1,1,-1,-1,-1,1,-1,1,1,-1,1]。 20. The method according to any one of claims 11 to 17, wherein, The rotation factor sequence is a target sequence; or, the rotation factor sequence is a sequence obtained by performing overall inversion on the target sequence.

21. The method according to claim 20, wherein, The target sequence is one of the following: [1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1]; or, [1,-1,-1,-1,-1,1,1,1,-1,1,1,1,-1,1,1,1]。 22. A communication device, wherein, The communication device includes a unit for performing the method according to any one of claims 1 to 21.

23. A communication device, wherein, It includes a processor and a transceiver. The processor is used to perform the generation operation in the method according to any one of claims 1 to 10, and the transceiver is used to perform the sending operation in the method according to any one of claims 1 to 10.

24. A communication device, wherein, It includes a processor and a transceiver. The processor is used to perform the parsing operation in the method according to any one of claims 11 to 21, and the transceiver is used to perform the receiving operation in the method according to any one of claims 11 to 21.

25. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions. When the computer instructions run on a computer, the computer is caused to execute the method according to any one of claims 1 to 21.

26. A computer program product, wherein, When the computer program product runs on a computer, the computer is caused to perform the method according to any one of claims 1 to 21.

27. A chip, wherein, The chip includes a processing circuit and a transceiver pin; the processing circuit is configured to perform the generating operation in the method according to any one of claims 1 to 10, and the transceiver pin is configured to perform the sending operation in the method according to any one of claims 1 to 10.

28. A chip, wherein, The chip includes a processing circuit and a transceiver pin; the processing circuit is configured to perform the parsing operation in the method according to any one of claims 11 to 21, and the transceiver pin is configured to perform the receiving operation in the method according to any one of claims 11 to 21.

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