Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus, which are applied to a wireless local area network system that supports IEEE 802.11ax next-generation Wi-Fi protocols (e.g., 802.11be, Wi-Fi 7 or EHT), IEEE 802.11be next-generation Wi-Fi protocols (e.g., Wi-Fi 8, UHR, 11bn), Wi-Fi AI, millimeter wave, ultra-wideband (UWB), or sensing. A first device sends, by means of a first bandwidth and to a second device, a non-TB PPDU that comprises an STF for bearing a first sequence, wherein the first sequence is a sequence formed on the basis of a rotation factor and an M sequence, and the first sequence corresponds to the first bandwidth, which is greater than 320MHz. Thus, the second device implements MIMO power control under a greater bandwidth on the basis of an STF sequence in the non-TB PPDU.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 24, 2023, with application number 202311386928.3 and application name “Communication Method and Communication 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 more specifically, to a communication method and a communication device. Background Art

[0003] With the rapid growth of wireless traffic, users are placing increasing demands on communication service quality, such as low latency and ultra-reliability. To meet these demands, wireless local area networks (WLANs), a key technology for carrying wireless traffic, must continue to develop and evolve.

[0004] Currently, solutions to improve the throughput of WLAN systems can be implemented through multi-input multi-output (MIMO) technology. Specifically, the receiver can perform MIMO power control through the short training field (STF) sequence in the non-triggered based physical protocol data unit (non-TB PPDU). However, the STF sequence in the current non-TB PPDU cannot be used for MIMO power control under larger bandwidths. Therefore, how to support MIMO power control under larger bandwidths is a technical problem that needs to be solved urgently.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device for supporting MIMO power control under a larger bandwidth.

[0007] In a first aspect, a communication method is provided, including: generating a non-TB PPDU corresponding to a first bandwidth, the non-TB PPDU including an STF for carrying a first sequence, the first sequence being a sequence based on a rotation factor and an M sequence, the M sequence being {-1,-1,-1,1,1,1,-1,1,1,-1,1,1,-1,1}; and sending the non-TB PPDU via the first bandwidth, the first bandwidth being greater than 320 MHz.

[0008] The execution subject of the solution described in the first aspect can be the first device, or a chip or integrated circuit provided in the first device, etc., without limitation. For ease of description, the following description takes the first device as an example.

[0009] The above-mentioned first sequence may also be referred to as an STF sequence.

[0010] By generating and sending a non-TB PPDU corresponding to a first bandwidth, where the first bandwidth is a bandwidth greater than 320 MHz, the non-TB PPDU includes an STF for carrying a first sequence and corresponding to the first bandwidth. In this way, the receiving side can use the STF sequence in the non-TB PPDU to implement MIMO power control under a larger bandwidth.

[0011] Since the maximum bandwidth supported by the existing STF sequence is 320 MHz, by designing an STF sequence corresponding to a larger bandwidth (for example, 640 MHz or 480 MHz, not limited to this), it is possible to support MIMO power control under a larger bandwidth.

[0012] In a second aspect, a communication method is provided, including: receiving a non-TB PPDU via a first bandwidth, the non-TB PPDU including an STF for carrying a first sequence, the first sequence being a sequence based on a rotation factor and an M sequence, the M sequence being {-1,-1,-1,1,1,1,-1,1,1,-1,1,1,-1,1}, and the first bandwidth being greater than 320 MHz; and processing the non-TB PPDU.

[0013] The execution subject of the solution described in the second aspect can be the second device, or a chip or integrated circuit provided in the second device, etc., without limitation. For ease of description, the following description will take the second device as an example.

[0014] By receiving a non-TB PPDU corresponding to a first bandwidth, where the first bandwidth is a bandwidth greater than 320 MHz, the non-TB PPDU includes an STF for carrying a first sequence and corresponding to the first bandwidth. In this way, the second device can use the STF sequence in the non-TB PPDU to implement MIMO power control under a larger bandwidth.

[0015] Since the maximum bandwidth supported by the existing STF sequence is 320 MHz, by designing an STF sequence corresponding to a larger bandwidth (for example, 640 MHz or 480 MHz, not limited to this), it is possible to support MIMO power control under a larger bandwidth.

[0016] In combination with the solution of any one of the first and second aspects, the first bandwidth is 640 MHz, and the first sequence is:

[0017] Among them, any one of c1, c2, c3, c4, c5, c6, c7 and c8 represents a rotation factor, and the value is 1 or -1.

[0018] The above-mentioned first sequence corresponds to a 640 MHz bandwidth. Thus, the embodiment of the present application can support MIMO power control under a 640 MHz bandwidth.

[0019] In combination with the solution of any one of the first and second aspects, the first bandwidth is 640 MHz, and the first sequence is:

[0020] Among them, any one of c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15 and c16 represents a rotation factor, and the value is 1 or -1.

[0021] The above-mentioned first sequence corresponds to a 640 MHz bandwidth. Thus, the embodiment of the present application can support MIMO power control under a 640 MHz bandwidth.

[0022] In combination with the solution of any one of the first and second aspects, the first bandwidth is 480 MHz, and the first sequence is:

[0023] Among them, any one of c1, c2, c3, c4, c5 and c6 represents a rotation factor, and the value is 1 or -1.

[0024] The above-mentioned first sequence corresponds to a 480 MHz bandwidth. Thus, the embodiment of the present application can support MIMO power control under a 480 MHz bandwidth.

[0025] In combination with the solution of any one of the first and second aspects, the first bandwidth is 480 MHz, and the first sequence is:

[0026] Among them, any one of c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11 and c12 represents a rotation factor, and the value is 1 or -1.

[0027] The above-mentioned first sequence corresponds to a 480 MHz bandwidth. Thus, the embodiment of the present application can support MIMO power control under a 480 MHz bandwidth.

[0028] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0029]

[0030] or,

[0031]

[0032] The above-mentioned first sequence is designed based on the first seed carrier distribution. When it is carried on the subcarriers included in the resources (such as resource units (RU) or multiple resource units (multi RU, MRU)) in the first seed carrier distribution for transmission, the peak-to-average power ratio (PAPR) performance of the first sequence is good, thereby being able to support MIMO power control under a larger bandwidth.

[0033] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0034] or,

[0035]

[0036] The above-mentioned first sequence is designed based on the first subcarrier distribution. When it is carried on the subcarriers included in the resources in the first subcarrier distribution for transmission, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0037] In combination with the solution described in any one of the first and second aspects, the resources that meet the first subcarrier distribution include any one of the following:

[0038] 8×996-tone RU, 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU and 484+242-tone MRU.

[0039] The STF sequence corresponding to the first seed carrier distribution (such as the first sequence) can be used for data transmission in a 640MHz bandwidth, ensuring the PAPR performance when there is 160 and 80MHz puncturing but no 40MHz puncturing, thereby solving the overhead problem of excessive MRU indications caused by 40MHz puncturing.

[0040] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0041]

[0042] or,

[0043]

[0044] The above-mentioned first sequence is designed based on the second subcarrier distribution. When it is carried on the subcarriers included in the resources in the second subcarrier distribution for transmission, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0045] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0046] or,

[0047]

[0048] The above-mentioned first sequence is designed based on the second subcarrier distribution. When it is carried on the subcarriers included in the resources in the second subcarrier distribution for transmission, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0049] In combination with the solution of any one of the first and second aspects, the resources satisfying the second subcarrier distribution include any one of the following:

[0050] 8×996-tone RU, 7×996+484-tone MRU, 7×996-tone MRU, 6×996+484-tone MRU, 6×996-tone MRU, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU, 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU and 484+242-tone MRU.

[0051] The STF sequence corresponding to the second seed carrier distribution (such as the first sequence mentioned above) can be used for data transmission in a 640 MHz bandwidth, ensuring the PAPR performance when puncturing at 160, 80, and 40 MHz at the same time, thereby ensuring the improved spectrum utilization brought about by the higher-precision puncturing of 40 MHz.

[0052] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0053]

[0054] or,

[0055]

[0056] The above-mentioned first sequence is designed based on the third subcarrier distribution. When it is carried on the subcarriers included in the resources in the third subcarrier distribution for transmission, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0057] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0058] or,

[0059]

[0060] The above-mentioned first sequence is designed based on the third subcarrier distribution. When it is carried on the subcarriers included in the resources in the third subcarrier distribution for transmission, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0061] In combination with the solution of any one of the first and second aspects, the resources that meet the third subcarrier distribution include any one of the following:

[0062] 6×996-tone MRU, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU, 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU and 484+242-tone MRU.

[0063] The STF sequence corresponding to the third subcarrier distribution (such as the first sequence described above) can be used for 640MHz bandwidth data transmission, ensuring data transmission in the 480MHz bandwidth formed when puncturing the first 160MHz or last 160MHz of the 640MHz band. This can be applied to bandwidth-limited scenarios (e.g., the maximum available bandwidth of the frequency band specified in some countries and regions is 500MHz). At the same time, because the bandwidth corresponding to the STF sequence is 640MHz, the STF sequence can also be used for data transmission in the 640MHz bandwidth.

[0064] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0065] or,

[0066]

[0067]

[0068] The above-mentioned first sequence is designed based on the fourth subcarrier distribution. When it is carried on the subcarriers included in the resources in the fourth subcarrier distribution for transmission, the maximum PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth.

[0069] In combination with the solution of any one of the first and second aspects, the first sequence is:

[0070] or,

[0071]

[0072] The above-mentioned first sequence is designed based on the fourth subcarrier distribution. When it is transmitted on the subcarriers included in the resources in the fourth subcarrier distribution, the first sequence has good PAPR performance, thereby being able to support MIMO power control under a larger bandwidth.

[0073] In combination with the solution described in any one of the first and second aspects, the resources that meet the fourth subcarrier distribution include any one of the following:

[0074] 6×996-tone RU, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU, 4×996-tone MRU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU and 484+242-tone MRU.

[0075] The STF sequence corresponding to the fourth subcarrier distribution (such as the first sequence mentioned above) can be used for data transmission in 480MHz bandwidth and can be directly applied to bandwidth-limited scenarios (such as: the maximum available bandwidth of the frequency band stipulated in some countries and regions is 500MHz).

[0076] In a third aspect, a communication device is provided, configured to execute the method provided in any one of the first and second aspects. Specifically, the communication device may include units and / or modules configured to execute the method provided in the first aspect or any one of the aforementioned implementations of the first aspect, or units and / or modules, such as a processing unit and / or a transceiver unit, configured to execute the method provided in the second aspect or any one of the aforementioned implementations of the second aspect.

[0077] In one implementation, the communication device is a device (e.g., a first device, or a second device). When the communication device is a device, the transceiver unit may be a transceiver or an input / output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0078] In another implementation, the communication device is a chip, chip system, or circuit used in a device (e.g., the first device or the second device). When the communication device is a chip, chip system, or circuit used in a device, the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0079] In a fourth aspect, a communication device is provided, which includes: a memory for storing programs; and at least one processor for executing computer programs or instructions stored in the memory to execute the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or to execute the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect.

[0080] In one implementation, the communication apparatus is a device (eg, a first device, or a second device).

[0081] In another implementation, the apparatus is a chip, a chip system, or a circuit used in a device (such as the first device or the second device).

[0082] In a fifth aspect, the present application provides a processor for executing the methods provided in the above aspects.

[0083] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as processor output, reception, input and other operations, and can also be understood as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0084] In a sixth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes instructions for executing the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or includes instructions for executing the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect.

[0085] In the seventh aspect, a computer program product comprising instructions is provided. When the computer program product is run on a computer, the computer is caused to execute the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or the computer is caused to execute the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect.

[0086] In an eighth aspect, a chip is provided, which includes a processor and an input / output interface. The processor reads instructions stored in a memory through the input / output interface, executes the method provided by the first aspect or any one of the above-mentioned implementations of the first aspect, or executes the method provided by the second aspect or any one of the above-mentioned implementations of the second aspect.

[0087] Optionally, as an implementation method, the chip also includes a memory, in which a computer program or instruction is stored, and the processor is used to execute the computer program or instruction stored on the memory. When the computer program or instruction is executed, the processor is used to execute the method provided by the above-mentioned first aspect or any one of the above-mentioned implementation methods of the first aspect, or execute the above-mentioned second aspect or the method provided by any one of the above-mentioned implementation methods of the second aspect.

[0088] In a ninth aspect, a communication system is provided, comprising the first device and the second device described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] FIG1 is a schematic diagram of an applicable scenario of an embodiment of the present application.

[0090] FIG2 is a schematic structural diagram of a communication device according to an embodiment of the present application.

[0091] FIG3 is a schematic diagram of subcarrier distribution and RU distribution in an 80 MHz bandwidth.

[0092] FIG4 is a schematic diagram of channel puncturing on an 80 MHz bandwidth.

[0093] FIG5 is a schematic diagram of a 7×996-tone MRU.

[0094] FIG6 is a schematic diagram of a 6×996-tone MRU.

[0095] FIG7 is a schematic diagram of a 5×996-tone MRU.

[0096] FIG8 is a schematic diagram of a 7×996+484-tone MRU.

[0097] FIG9 is a schematic diagram of a 6×996+484-tone MRU.

[0098] FIG10 is a schematic diagram of a 5×996+484-tone MRU.

[0099] FIG11 is a schematic diagram of a 4×996+484-tone MRU.

[0100] FIG12 is a schematic diagram of another 5×996+484-tone MRU.

[0101] FIG13 is a schematic diagram of another 5×996-tone MRU.

[0102] FIG14 is a schematic diagram of another 4×996+484-tone MRU.

[0103] FIG15 is a schematic diagram of another 4×996-tone MRU.

[0104] FIG16 is a schematic diagram of an interaction flow of a communication method according to an embodiment of the present application.

[0105] FIG17 is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0106] Figure 18 is a schematic block diagram of another communication device provided in an embodiment of the present application.

[0107] FIG19 is a schematic block diagram of a chip system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0108] The technical solution in this application will be described below with reference to the accompanying drawings.

[0109] The technical solution provided in the embodiments of the present application can be applicable to wireless local area network (WLAN) scenarios, for example, supporting the Institute of Electrical and Electronics Engineers (IEEE) 802.11 related standards, such as 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, IEEE 802.11ax next-generation Wi-Fi protocols, such as 802.11be, Wi-Fi 7, extremely high throughput (EHT), 802.11ad, 802.11ay or 802.11bf, such as the next generation of 802.11be, Wi-Fi 8, etc., and can also be applied to wireless personal area network systems based on ultra-wide band (UWB), such as the 802.15 series standards, and can also be applied to sensing systems, such as the 802.11bf series standards. The 802.11n standard is known as the high throughput (HT) standard, the 802.11ac standard is known as the very high throughput (VHT) standard, the 802.11ax standard is known as the high efficiency (HE) standard, and the 802.11be standard is known as the extremely high throughput (EHT) standard. 802.11bf includes two major categories of standards: low-frequency (e.g., sub7 GHz) and high-frequency (e.g., 60 GHz). The sub7 GHz implementation primarily relies on 802.11ac, 802.11ax, 802.11be, and their next-generation standards, while the 60 GHz implementation primarily relies on 802.11ad, 802.11ay, and their next-generation standards. 802.11ad may also be called a directional multi-gigabit (DMG) standard, and 802.11ay may also be called an enhanced directional multi-gigabit (EDMG) standard.

[0110] Although the embodiments of the present application are primarily described using the deployment of a WLAN network, particularly a network using the IEEE 802.11 system standard, as an example, those skilled in the art will readily appreciate that the various aspects of the embodiments of the present application can be extended to other networks using various standards or protocols, such as a high-performance wireless local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks now known or developed in the future. Therefore, regardless of the coverage area and wireless access protocol used, the various aspects provided in the embodiments of the present application can be applied to any suitable wireless network.

[0111] The technical solutions of the embodiments of the present application can also be applied to various communication systems, such as: WLAN communication system, wireless fidelity (Wi-Fi) system, 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, fifth generation (5G) communication system, and the like. th generation, 5G) systems or new radio (NR), sixth generation (6 th generation (6G) systems, Internet of Things (IoT) networks, or Vehicle to X (V2X) networks, etc.

[0112] The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is described uniformly here and will not be repeated below.

[0113] FIG1 is a schematic diagram of an applicable scenario of an embodiment of the present application. As shown in FIG1 , the communication method provided by the present application is applicable to data communication between stations (STAs), wherein the station can be an access point (AP) type station or a non-access point type station (none access point station, non-AP STA), respectively referred to as AP and non-AP station. Specifically, the scheme of the present application is applicable to data communication between an AP and one or more non-AP stations (for example, data communication between AP1 and non-AP STA1, non-AP STA2), and is also applicable to data communication between APs (for example, data communication between AP1 and AP2), as well as data communication between non-AP STAs and non-AP STAs (for example, data communication between non-AP STA2 and non-AP STA3).

[0114] An access point is a node that allows terminals (such as mobile phones) to access a wired (or wireless) network. It is primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. It can also be deployed outdoors. An access point acts as a bridge between wired and wireless networks, connecting wireless network clients and then connecting the wireless network to the Ethernet.

[0115] Specifically, the access point can be a terminal or network device with a Wi-Fi chip, or can be a terminal or network device including a chip with access to a wired (wireless) network. The network device can be a server, a router, a switch, a bridge, a computer, a mobile phone, a relay station, a vehicle-mounted device, a wearable device, a network device in a 5G network, a network device in a 6G network, or a network device in a public land mobile network (PLMN), etc., without limitation. The access point can be a device that supports the Wi-Fi standard. For example, the access point can also support one or more standards of the IEEE 802.11 series, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0116] A non-AP site may be a wireless communication chip, a wireless sensor, or a wireless communication terminal, and may also be referred to as a user, user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. A non-AP site may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, an Internet of Things (IoT) device, a wearable device, a terminal device in a 5G network, a terminal device in a 6G network, or a terminal device in a PLMN, etc., without limitation. A non-AP site may be a device that supports the WLAN standard. For example, a non-AP station may support one or more standards in the IEEE 802.11 series, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0117] For example, non-AP sites can include mobile phones, tablets, set-top boxes, smart TVs, smart wearable devices, in-vehicle communication devices, computers, IoT nodes, sensors, smart home devices such as smart cameras, smart remote controls, smart water and electricity meters, and sensors in smart cities.

[0118] The above-mentioned AP or non-AP site may include a transmitter, a receiver, a memory, a processor, etc., wherein the transmitter and the receiver are used for sending and receiving packet structures respectively, the memory is used to store signaling information and store preset values ​​agreed in advance, etc., and the processor is used to parse signaling information, process related data, etc.

[0119] For example, Figure 2 is a schematic structural diagram of a communication device according to an embodiment of the present application. The device shown in Figure 2 can be an AP or a non-AP station. A medium access control (MAC) layer processing module, a physical (PHY) layer processing module, a radio frequency (RF) / antenna, etc. are used to implement the aforementioned transmitter and receiver related functions. As shown in Figure 2, in addition to the MAC layer processing module, the PHY layer processing module, the RF / antenna, the memory, and the processor, the device can also include a controller and a scheduler.

[0120] It should be understood that FIG2 is merely an example of a device provided in the present application and does not constitute a limitation of the present application. For example, the device may not include a controller and / or a scheduler.

[0121] To facilitate understanding of the embodiments of the present application, several nouns or terms involved in the present application are first introduced below.

[0122] 1. Subcarrier: Wireless communication signals are transmitted within a certain channel bandwidth. Orthogonal frequency division multiplexing (OFDM) technology can be used to divide the bandwidth into multiple frequency components at certain frequency intervals within the channel bandwidth. These components are called subcarriers.

[0123] 2. Subcarrier distribution (Tone Plan) based on continuous RU definition

[0124] Refer to Figure 3, which is a schematic diagram of the subcarrier distribution and RU distribution in an 80MHz bandwidth. When the bandwidth is 80MHz, the entire bandwidth can be composed of 4 242-tone RUs, or a 996-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, and 484-tone RU. Among them, 26-tone RU means that the RU contains 26 subcarriers, 52-tone RU means that the RU contains 52 subcarriers, 106-tone RU means that the RU contains 106 subcarriers, and so on. In addition to the subcarriers used to transmit data, the RU also includes pilot subcarriers. In addition to the subcarriers that make up the RU, the bandwidth also includes some guard subcarriers, empty subcarriers, or direct current (DC) subcarriers.

[0125] When the bandwidth is an integer multiple of 80 MHz, the entire bandwidth can be viewed as a copy of multiple 80 MHz subcarrier distributions. For example, when the bandwidth is 240 MHz, the entire bandwidth can be viewed as a copy of three 80 MHz subcarrier distributions; when the bandwidth is 320 MHz, the entire bandwidth can be viewed as a copy of four 80 MHz subcarrier distributions. A separate distribution diagram is not provided here.

[0126] 3. Multi-Resource Unit (Multi-RU, MRU): MRU includes multiple continuous or discontinuous RUs. In other words, MRU is an RU composed of multiple RUs.

[0127] For example, the 802.11be protocol introduces multiple MRUs: a 52+26-tone MRU consisting of a 52-tone RU and a 26-tone RU, a 106+26-tone MRU consisting of a 106-tone RU and a 26-tone RU, a 484+242-tone MRU consisting of a 484-tone RU and a 242-tone RU, a 996+484-tone MRU consisting of a 996-tone RU and a 484-tone RU, a 242+484+996-tone MRU consisting of a 242-tone RU, a 484-tone RU, and a 996-tone RU, a 2×996+484-tone MRU consisting of two 996-tone RUs and a 484-tone RU, a 3×996-tone MRU consisting of three 996-tone RUs, and a 484-tone MRU. RU consists of 3×996+484-tone MRU, etc.

[0128] The above-mentioned MRU may also include MRUs with larger bandwidths, such as 5×996-tone MRU, 6×996-tone MRU, 7×996-tone MRU, 8×996-tone RU, 6×996+484-tone MRU, 5×996+484-tone MRU, and 4×996+484-tone MRU.

[0129] It should be noted that the MRU described in the embodiments of the present application may include not only the MRU defined in 802.11be, but also the MRU defined in future standards, such as the MRU under the aforementioned larger bandwidth, which will be further described below.

[0130] 3. Preamble punctured

[0131] Some channels may be unavailable for a period of time or at a specific time due to the following possible reasons:

[0132] 1) Presence of radar signals: In unlicensed spectrum, WLAN users should proactively avoid radar signals if they detect them.

[0133] 2) Authorized users exist. On certain channels, there may be authorized users. If a WLAN user discovers an authorized user, it should actively avoid him.

[0134] 3) There is interference from other users.

[0135] To address these scenarios where sub-channel transmission is not permitted, the 802.11ax protocol proposes a preamble puncturing method, which allows the transmitter to transmit PPDUs even when some sub-channels are busy.

[0136] Figure 4 illustrates channel puncturing within an 80MHz bandwidth. As shown in Figure 4, the 80MHz bandwidth consists of four 20MHz subchannels, labeled, from lowest frequency to highest frequency, as subchannel 1 (CH1), subchannel 2 (CH2), subchannel 3 (CH3), and subchannel 4 (CH4). CH1 is the primary channel, while CH2, CH3, and CH4 are slave channels. If CH2 is punctured, it becomes unusable, but CH1, CH3, and CH4 remain available.

[0137] Embodiments of the present application support channel puncturing at larger bandwidths. For example, a 640MHz bandwidth includes four 160MHz subchannels, which are labeled, from low to high frequency, as subchannel 1 (CH1), subchannel 2 (CH2), subchannel 3 (CH3), and subchannel 4 (CH4). If CH2 is punctured, CH2 becomes unusable, while CH1, CH3, and CH4 remain usable. For another example, a 640MHz bandwidth also includes eight 80MHz subchannels, which are labeled, from low to high frequency, as subchannel 1 (CH1), subchannel 2 (CH2), subchannel 3 (CH3), subchannel 4 (CH4), subchannel 5 (CH5), subchannel 6 (CH6), subchannel 7 (CH7), and subchannel 8 (CH8). If CH2 is punctured, CH2 becomes unusable, while CH1, CH3, CH4, CH5, CH6, CH7, and CH8 remain usable. The above description also applies to other bandwidths, such as 480MHz, and will not be repeated here.

[0138] The relationship between preamble puncturing and MRU type is described below in conjunction with FIG. 5 to FIG. 15 .

[0139] (1) First subcarrier distribution (tone plan)

[0140] The resources that meet the first sub-carrier distribution may be RUs or MRUs, which is not limited thereto, and the number of resources that meet the first sub-carrier distribution is not limited thereto, and may be one or more.

[0141] It should be noted that, if the first subcarrier distribution is punctured, the puncturing granularity of the first subcarrier distribution may include one or more of 160 MHz and 80 MHz. Compared with the method using a 40 MHz puncturing granularity, the subcarrier distribution using this puncturing method reduces the MRU indication overhead.

[0142] The following description is based on the example of the first subcarrier distribution corresponding to 640MHz bandwidth. Resources that meet the requirements of the first subcarrier distribution include but are not limited to:

[0143] 8×996-tone RU, 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, and RU or MRU in the 802.11be protocol.

[0144] For example, a 7×996-tone MRU can be considered as a 996-tone RU in an 8×996-tone RU that is punctured. There are eight locations of the punctured 996-tone RU, namely 7×996-tone MRU 1 to 8 shown in FIG. 5 .

[0145] For example, a 6×996-tone MRU can be considered as two 996-tone RUs (connected together) in an 8×996-tone RU that are punctured, and there are four locations for the punctured 996-tone RUs, namely 6×996-tone MRUs 1 to 4 shown in FIG6 .

[0146] For example, a 5×996-tone MRU can be considered as being obtained by punching three 996-tone RUs (two 996-tone RUs connected together) in an 8×996-tone RU. There are 12 locations of the punched 996-tone RUs, namely 5×996-tone MRUs 1 to 12 shown in FIG. 7 .

[0147] The resources satisfying the first subcarrier distribution are merely examples, and may also include RUs or MRUs defined in 802.11be.

[0148] (2) Second subcarrier distribution

[0149] The resources satisfying the second sub-carrier distribution may be RUs or MRUs, which are not limited thereto, and the number of resources satisfying the second sub-carrier distribution is not limited thereto, and may be one or more.

[0150] It should be noted that, if puncturing is performed on the second subcarrier distribution, the puncturing granularity of the second subcarrier distribution may include one or more of 160 MHz, 80 MHz, and 40 MHz. Using this puncturing method for subcarrier distribution improves spectrum utilization.

[0151] The second subcarrier distribution corresponds to a 640 MHz bandwidth. Resources that meet the second subcarrier distribution requirements include but are not limited to:

[0152] 8×996-tone RU, 7×996+484-tone MRU, 7×996-tone MRU, 6×996+484-tone MRU, 6×996-tone MRU, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU and RU or MRU in the 802.11be protocol.

[0153] For example, a 7×996+484-tone MRU can be considered as a 484-tone RU in an 8×996-tone RU that is punctured. There are 16 locations of the punctured 484-tone RU, namely 7×996+484-tone MRU 1 to 16 shown in FIG8 .

[0154] For example, a 6×996+484-tone MRU can be considered as one 484-tone RU and one 996-tone RU punctured in an 8×996-tone RU. There are 28 locations of punctured 484-tone RUs and 996-tone RUs, which are 6×996+484-tone MRUs 1 to 28 shown in FIG9 .

[0155] For example, a 5×996+484-tone MRU can be considered as one 484-tone RU and two 996-tone RUs punched out of an 8×996-tone RU. There are 24 locations of punched 484-tone RUs and 996-tone RUs, which are 5×996+484-tone MRUs 1 to 24 shown in FIG10 .

[0156] For example, a 4×996+484-tone MRU can be considered as one 484-tone RU and three 996-tone RUs punctured in an 8×996-tone RU. There are 40 punctured 484-tone RU and 996-tone RU locations, which are 4×996+484-tone MRUs 1 to 40 shown in FIG11 .

[0157] For the description of 7×996-tone MRU, 6×996-tone MRU and 5×996-tone MRU in the resources satisfying the second subcarrier distribution, reference may be made to the description of the resources in the first subcarrier distribution, which will not be repeated here.

[0158] The above resources meeting the second subcarrier distribution are only examples, and may also include RUs or MRUs defined in 802.11be.

[0159] (3) Third-party subcarrier distribution

[0160] The resources that meet the third subcarrier distribution may be RU or MRU, which is not limited, and the number of resources that meet the third subcarrier distribution is not limited, and may be one or more.

[0161] It should be noted that, if puncturing is performed on the third subcarrier distribution, the puncturing granularity of the third subcarrier distribution may include one or more of 160 MHz, 80 MHz, and 40 MHz. Using this puncturing method for subcarrier distribution improves spectrum utilization.

[0162] The third subcarrier distribution corresponds to 480MHz bandwidth as an example. Resources that meet the third subcarrier distribution include but are not limited to:

[0163] 6×996-tone MRU 1, 6×996-tone MRU 4, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU, and RU or MRU in the 802.11be protocol.

[0164] For example, a 5×996+484-tone MRU can be considered as one 484-tone RU and two 996-tone RUs punctured in an 8×996-tone RU. There are 24 locations of punctured 484-tone RUs and 2×996-tone RUs, which are 5×996+484-tone MRUs 1 to 24 shown in FIG10 .

[0165] For example, a 5×996-tone MRU can be considered as being obtained by puncturing three 996-tone RUs in an 8×996-tone RU, and there are 12 positions of the punctured 996-tone RUs, namely 5×996-tone MRUs 1 to 12 shown in FIG. 7 .

[0166] For example, a 4×996+484-tone MRU can be considered as one 484-tone RU and three 996-tone RUs punctured in an 8×996-tone RU. There are 40 punctured 484-tone RU and 996-tone RU locations, which are 4×996+484-tone MRUs 1 to 40 shown in FIG11 .

[0167] For the description of the 6×996-tone MRU 1 and the 6×996-tone MRU 4 in the resources satisfying the third subcarrier distribution, reference may be made to the description of the resources in the first subcarrier distribution, which will not be repeated here.

[0168] The resources satisfying the third subcarrier distribution are merely examples, and may also include RUs or MRUs defined in 802.11be.

[0169] (IV) Fourth subcarrier distribution

[0170] The resources that meet the fourth subcarrier distribution may be RU or MRU, which is not limited, and the number of resources that meet the fourth subcarrier distribution is not limited, and may be one or more.

[0171] It should be noted that, if puncturing is performed on the third subcarrier distribution, the puncturing granularity of the third subcarrier distribution may include one or more of 160 MHz, 80 MHz, and 40 MHz. Using this puncturing method for subcarrier distribution improves spectrum utilization.

[0172] The fourth subcarrier distribution corresponds to 480MHz bandwidth as an example. Resources that meet the fourth subcarrier distribution include but are not limited to:

[0173] 6×996-tone RU, 5×996+484-tone MRU, 5×996-tone MRU, 4×996+484-tone MRU, 4×996-tone MRU, and RU or MRU in the 802.11be protocol.

[0174] For example, a 5×996+484-tone MRU can be considered as a 484-tone RU in a 6×996-tone RU that is punctured. There are 12 locations of the punctured 484-tone RU, namely 5×996+484-tone MRU 1 to 12 shown in FIG. 12 .

[0175] For example, a 5×996-tone MRU can be considered as a 996-tone RU in a 6×996-tone RU that is punctured, and there are six locations of the punctured 996-tone RU, namely 5×996-tone MRU 1 to 6 shown in FIG. 13 .

[0176] For example, a 4×996+484-tone MRU can be considered as one 484-tone RU and one 996-tone RU punctured in a 6×996-tone RU. There are 20 locations of punctured 484-tone RUs and 996-tone RUs, which are 4×996+484-tone MRUs 1 to 20 shown in FIG. 14 .

[0177] For example, a 4×996-tone MRU can be considered as two 996-tone RUs in a 6×996-tone RU that are punctured, and there are three locations of the punctured 996-tone RUs, namely 4×996-tone MRUs 1 to 3 shown in FIG. 15 .

[0178] The above resources satisfying the fourth subcarrier distribution are merely examples, and may also include RUs or MRUs defined in 802.11be.

[0179] It should be uniformly explained that the above four subcarrier distributions are respectively used to describe the distribution or division of different subcarriers within a bandwidth.

[0180] It should also be noted that, in the embodiment of the present application, corresponding STF sequences can be set for different subcarrier distributions, so that MIMO power control corresponding to different subcarrier distributions under a larger bandwidth can be supported.

[0181] The first subcarrier distribution to the fourth subcarrier distribution described above are described using 640 MHz and 480 MHz as examples, but are also applicable to the description of the relationship between puncturing and MRU in other bandwidths, which will not be repeated here.

[0182] In order to solve the technical problems mentioned in the background technology section, the present application provides a communication method and a communication device for supporting MIMO power control under a larger bandwidth. For details, please refer to Figure 16.

[0183] For ease of understanding and explanation, the following text takes the interaction between the first device and the second device as an example to illustrate the method provided in the embodiment of the present application, but this should not constitute any limitation on the execution subject of the method provided in the present application. For example, the first device shown below can be replaced by a component configured in the first device (such as a circuit, a chip or a chip system, etc.), and the second device can be replaced by a component configured in the second device (such as a circuit, a chip or a chip system, etc.). The first device can be an AP or a STA, and the second device can be a STA or an AP. The STF sequence provided in the embodiment of the present application can be used for uplink transmission or for downlink transmission.

[0184] FIG16 is a schematic diagram of an interaction flow of a communication method according to an embodiment of the present application. As shown in FIG16 , the method includes:

[0185] S601: A first device generates a non-TB PPDU corresponding to a first bandwidth, where the non-TB PPDU includes an STF for carrying a first sequence, where the first sequence is a sequence composed of a rotation factor and an M sequence.

[0186] In one embodiment, the first bandwidth is a bandwidth greater than 320 MHz. For example, the first bandwidth may be 480 MHz, 640 MHz, or the like.

[0187] The above-mentioned "generating a non-TB PPDU corresponding to the first bandwidth" can be: the bandwidth used to transmit the non-TB PPDU is the first bandwidth, or the fields in the non-TB PPDU are transmitted through the first bandwidth, for example, the preamble signaling field and data field in the non-PPDU are both transmitted through the first bandwidth.

[0188] The aforementioned “non-TB PPDU” may also be a multi-user (MU) PPDU, or may be a term other than TB PPDU defined in future standards, which is not limited thereto.

[0189] The first sequence mentioned above is an STF sequence.

[0190] Furthermore, the first sequence can be used for MIMO power control at a wider bandwidth. For example, since the maximum bandwidth supported by existing STF sequences is 320 MHz, by designing STF sequences corresponding to a wider bandwidth (e.g., 640 MHz or 480 MHz, without limitation), MIMO power control at a wider bandwidth can be achieved.

[0191] The first sequence may include multiple second sequences, each second sequence is a sequence based on a rotation factor and at least one M sequence, and one second sequence corresponds to one second bandwidth.

[0192] In addition, the M sequence may include a +M sequence and a -M sequence. An example of a +M sequence is {-1,-1,-1,1,1,1,-1,1,1,-1,1,1,-1,1}, and an example of a -M sequence is {1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1}.

[0193] In a possible embodiment, the first bandwidth and the second bandwidth satisfy a certain correlation:

[0194] For example, the first bandwidth is 640 MHz, the second bandwidth may be 80 MHz, and the first sequence includes 8 second sequences;

[0195] For another example, the first bandwidth is 640 MHz, the second bandwidth may be 40 MHz, and the first sequence includes 16 second sequences;

[0196] For another example, the first bandwidth is 480 MHz, the second bandwidth may be 80 MHz, and the first sequence includes 6 second sequences;

[0197] For another example, the first bandwidth is 480 MHz, the second bandwidth may be 40 MHz, and the first sequence includes 12 second sequences;

[0198] For another example, the first bandwidth is 640 MHz, the second bandwidth may be 20 MHz, and the first sequence includes 32 second sequences;

[0199] For another example, the first bandwidth is 480 MHz, the second bandwidth may be 20 MHz, and the first sequence includes 24 second sequences.

[0200] In summary, the multiple relationship between the first bandwidth and the second bandwidth is related to the number of second sequences included in the first sequence.

[0201] For ease of description, the first sequence is described below using the first bandwidth of 640 MHz and 480 MHz as examples. The description of 640 MHz and 480 MHz is also applicable to other bandwidths greater than 320 MHz and will not be repeated here.

[0202] 1. The first bandwidth is 640MHz

[0203] Scenario #1: The STF sequence corresponding to the first bandwidth is designed based on the M sequence corresponding to the second bandwidth of 80 MHz.

[0204] First sequence through STF -A:B:A Indicates (the values ​​of A and B are not limited, -A indicates the subscript number of the starting subcarrier, A indicates the subscript number of the ending subcarrier, and B indicates the subcarrier spacing, that is, the interval between two adjacent subcarriers is B-1 subcarriers. Among them, -A:B:A means that the value of the STF sequence is carried in the range from subcarrier -A to subcarrier A, and every 16 subcarriers carry an STF sequence value, and the value carried on the other subcarriers is 0).

[0205] For example, the STF corresponding to 640 MHz -A:·B:A for:

[0206] Any of c1, c2, c3, c4, c5, c6, c7, and c8 above represents a rotation factor, with a value of 1 or -1. {M, 1, -M, 0, -M, 1, -M} is the second sequence, and "0" in the above expression represents a subcarrier zero value.

[0207] The above-mentioned first sequence corresponds to a 640 MHz bandwidth. Thus, the embodiment of the present application can support MIMO power control under a 640 MHz bandwidth.

[0208] Since the first bandwidth is 640MHz and the second bandwidth is 80MHz, there are 8 second sequences in total. Each second sequence needs to be configured with a rotation factor. The value of each rotation factor is 1 or -1, and 2 8 = 256 possible rotation factor sequences. The rotation factor sequence can be expressed as c = {±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1}. For each rotation factor sequence, a first sequence can be constructed accordingly.

[0209] Due to OFDMA transmission and preamble puncturing, only a portion of the frequency domain resources RU or MRU within the complete bandwidth may be used for transmission. At this time, only the first sequence corresponding to the transmitted RU or MRU portion remains unchanged, and the first sequence corresponding to the punctured (not used for transmission) RU or MRU portion will be set to zero (in other words, among the values ​​of the elements included in the first sequence, the values ​​of the elements corresponding to the unpunctured RU / MRU are transmitted through the subcarriers included in the unpunctured RU / MRU, and the values ​​carried on the subcarriers included in the punctured RU / MRU are zero). The PAPR of the first sequence after the partial zeroing operation is calculated to minimize the maximum PAPR of the STF sequence corresponding to the RU or MRU.

[0210] Furthermore, PAPR can be calculated using the formula PAPR = max(abs(ifft(STF,N)).^2) / mean(abs(ifft(STF,N)).^2). Here, ifft(STF,N) represents the result of the N-point inverse fast Fourier transform (IFFT) of the sequence. N can be upsampled by four times the number of ifft points required for the sequence. abs() represents the absolute value of the sequence, x.^2 represents the square of each point in the sequence, and mean() represents the average value of the sequence. For a detailed description, please refer to the prior art and will not be repeated here.

[0211] For different subcarrier distributions, the first sequence may have different forms (or the first sequence may be constructed by different rotation factor sequences and M sequences) so as to support MIMO power control corresponding to different subcarrier distributions under a larger bandwidth.

[0212] STF -A:B:A A possible implementation is A=4080, B=16, where B=16 indicates that the subcarrier spacing is 16, that is, there are 15 subcarriers between two adjacent subcarriers, and the value of the STF sequence starts from the subcarrier with a subscript of -4080 and ends at the subcarrier with a subscript of 4080. Every 16 subcarriers carry an STF sequence value, and the 15 subcarriers between two subcarriers carrying the STF sequence value carry a zero value.

[0213] An example,

[0214] or,

[0215]

[0216] The rotation factor sequence C is {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,-1}.

[0217] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth.

[0218] The description of the above beneficial effects can be found in Table 1.

[0219] Table 1

[0220] It should be noted that the first column of Table 1 shows the distribution of the first subcarrier, indicating the different distributions of each RU / MRU size within the bandwidth. For example, the third row, 7×996-tone MRU1-7×996-tone MRU 8, indicates that there are eight 7×996-tone MRUs, MRU1 through MRU8. The eight different distributions of each 7×996-tone MRU within the bandwidth can be seen in Figure 5. The following table and the other rows of Table 1 are similar and are not repeated here.

[0221] As shown in Table 1, for resources that meet the first sub-carrier distribution, for example:

[0222] For an 8×996-tone RU (see Figure 5 ), the PAPR corresponding to the first sequence is 7.978916 dB;

[0223] For multiple 7×996-tone MRUs (see Figure 5 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.741234 dB;

[0224] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.540611 dB;

[0225] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 9.193843 dB;

[0226] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.938554dB;

[0227] For multiple 3×996+384-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.147945 dB;

[0228] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.299883dB;

[0229] For multiple 2×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.53897;

[0230] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.984575dB;

[0231] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.861174dB;

[0232] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.365109 dB;

[0233] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 4.52867dB;

[0234] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897 dB.

[0235] In summary, through the above-mentioned first sequence, MIMO power control at 640 MHz can be achieved.

[0236] For 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-toneRU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, 484+242-tone MRU, etc., please refer to the above descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0237] The STF sequence corresponding to the first subcarrier distribution can be used for data transmission in a 640MHz bandwidth, ensuring the PAPR performance when 160 and 80MHz puncturing is present but 40MHz puncturing is absent, thereby resolving the overhead problem of excessive MRU indications caused by 40MHz puncturing.

[0238] In addition, the above-mentioned first sequence is designed based on the first seed carrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the first seed carrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0239] Another example,

[0240] or,

[0241]

[0242]

[0243] The rotation factor sequence C is {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,-1,1}.

[0244] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 2.

[0245] Table 2

[0246] As shown in Table 2, for resources that meet the second sub-carrier distribution, for example:

[0247] For an 8×996-tone RU (see Figure 8 ), the PAPR corresponding to the first sequence is 6.938066 dB;

[0248] For multiple 7×996+484-tone MRUs (see Figure 8 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.216208 dB;

[0249] For multiple 7×996-tone MRUs (see Figure 5 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.896664 dB;

[0250] For multiple 6×996+484-tone MRUs (see Figure 9 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.934902 dB;

[0251] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.966123 dB;

[0252] For multiple 5×996+484-tone MRUs (see Figure 10 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.892197 dB;

[0253] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 9.026504 dB;

[0254] For multiple 4×996+484-tone MRUs (see Figure 11 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 9.279091 dB;

[0255] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.938554dB;

[0256] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.147945 dB;

[0257] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.299883dB;

[0258] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.165938 dB;

[0259] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.53897 dB;

[0260] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.861174dB;

[0261] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.365109 dB;

[0262] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 4.52867dB;

[0263] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897 dB.

[0264] In summary, the first sequence described above enables MIMO power control at 640 MHz. For information on 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, and 996-tone RU, refer to the descriptions of 7×996-tone MRU, 6×996-tone MRU, and 5×996-tone MRU, as well as existing standards, and will not be repeated here.

[0265] In addition, the STF sequence corresponding to the second subcarrier distribution can be used for 640MHz bandwidth data transmission, ensuring the PAPR performance when 160, 80 and 40MHz puncturing are simultaneously achieved, thereby ensuring the improved spectrum utilization brought about by the higher-precision 40MHz puncturing.

[0266] In addition, the above-mentioned first sequence is designed based on the second seed carrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the second seed carrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0267] Another example,

[0268] or,

[0269]

[0270] The rotation factor sequence C is {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}.

[0271] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 3.

[0272] Table 3

[0273] As shown in Table 3, for resources that meet the third subcarrier distribution, for example:

[0274] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.874797 dB;

[0275] For multiple 5×996+484-tone MRUs (see Figure 10 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.950486 dB;

[0276] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.770729 dB;

[0277] For multiple 4×996+484-tone MRUs (see Figure 11 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.783164 dB;

[0278] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.596877 dB;

[0279] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.201994dB;

[0280] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.563739 dB;

[0281] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.331781dB;

[0282] For multiple 2×996-tone RUs, the maximum of the multiple PAPRs corresponding to the first sequence is 5.928254 dB;

[0283] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.540415dB;

[0284] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 6.426335dB;

[0285] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 4.52867dB;

[0286] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897 dB.

[0287] In addition, for the descriptions of 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, 484+242-tone MRU, etc., please refer to the aforementioned descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0288] In summary, through the above-mentioned first sequence, MIMO power control at 640MHz can be achieved. In addition, the STF sequence corresponding to the third subcarrier distribution can be used for data transmission in 640MHz bandwidth, ensuring the 480MHz transmission formed when the first 160MHz or last 160MHz of 640MHz is punched, and can be applied to bandwidth-limited scenarios (such as: the maximum available bandwidth of the frequency band stipulated in some countries and regions is 500MHz). At the same time, because the bandwidth corresponding to the STF sequence is 640MHz, the STF sequence can also be used for data transmission in 640MHz bandwidth.

[0289] In addition, the above-mentioned first sequence is designed based on the third subcarrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the third subcarrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0290] Scenario #2: The STF sequence corresponding to the first bandwidth is designed based on the M sequence corresponding to the second bandwidth of 40 MHz.

[0291] First sequence through STF -A:B:A Indicates (for the explanation of A, -A and B, please refer to the content of Scenario 1):

[0292] For example, the STF corresponding to 640 MHz -A:·B:A for:

[0293] Any of the above c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15 and c16 represents a rotation factor, and the value is 1 or -1.

[0294] The above-mentioned first sequence corresponds to 640 MHz. Thus, the embodiment of the present application can support MIMO power control at 640 MHz.

[0295] Since the first bandwidth is 640MHz and the second bandwidth is 40MHz, there are 16 second sequences in total. Each second sequence needs to be configured with a rotation factor. The value of each rotation factor is 1 or -1, and 2 16 = 65536 possible rotation factor sequences. The rotation factor sequence can be expressed as c = {±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1}. For each rotation factor sequence, a first sequence can be constructed accordingly.

[0296] Due to OFDMA transmission and preamble puncturing, only a portion of the frequency domain resources (RU) or MRU) within the full bandwidth may be used for transmission. In this case, only the first sequence corresponding to the transmitted RU or MRU portion remains unchanged, while the first sequence corresponding to the punctured (not used for transmission) RU or MRU portion is reset to zero. PAPR is calculated for the partially zeroed first sequence to minimize the maximum PAPR of the STF sequence corresponding to the RU or MRU.

[0297] For different subcarrier distributions, the first sequence may have different forms (or be a specific rotation factor sequence) so as to support MIMO power control corresponding to different subcarrier distributions in a larger bandwidth.

[0298] Specifically, another example,

[0299]

[0300] or,

[0301]

[0302] The rotation factor sequence C is {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}.

[0303] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 4.

[0304] Table 4

[0305] As shown in Table 4, for resources that meet the first sub-carrier distribution, for example:

[0306] For an 8×996-tone RU (see Figure 5 ), the PAPR corresponding to the first sequence is 7.300856 dB;

[0307] For multiple 7×996-tone MRUs (see Figure 5 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.743556 dB;

[0308] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.759939 dB;

[0309] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.608004 dB;

[0310] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 6.614933 dB;

[0311] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.32952dB;

[0312] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.563739 dB;

[0313] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.331781dB;

[0314] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.53897 dB;

[0315] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.861174dB;

[0316] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.442645dB;

[0317] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.044353 dB;

[0318] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897.

[0319] In summary, through the above-mentioned first sequence, MIMO power control at 640 MHz can be achieved.

[0320] For 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-toneRU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, 484+242-tone MRU, etc., please refer to the above descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0321] In addition, the STF sequence corresponding to the first subcarrier distribution can be used for data transmission in 640MHz bandwidth, ensuring the PAPR performance when 160 and 80MHz puncturing is present but 40MHz puncturing is absent, thereby solving the overhead problem of excessive MRU indications caused by 40MHz puncturing.

[0322] In addition, the above-mentioned first sequence is designed based on the first seed carrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the first seed carrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0323] Another example,

[0324] or,

[0325]

[0326] The rotation factor sequence C is {1,1,-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,-1,1}.

[0327] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 5.

[0328] Table 5

[0329] As described in Table 5, for resources that meet the second sub-carrier distribution, for example:

[0330] For an 8×996-tone RU (see Figure 8 ), the PAPR corresponding to the first sequence is 5.953742 dB;

[0331] For multiple 7×996+484-tone MRUs (see Figure 8 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.411041 dB;

[0332] For multiple 7×996-tone MRUs (see Figure 5 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.613018 dB;

[0333] For multiple 6×996+484-tone MRUs (see Figure 9 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.274701 dB;

[0334] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.576385 dB;

[0335] For multiple 5×996+484-tone MRUs (see Figure 10 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.678987 dB;

[0336] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.608004 dB;

[0337] For multiple 4×996+484-tone MRUs (see Figure 11 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.01358 dB;

[0338] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.7918 dB;

[0339] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.39178dB;

[0340] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.689167dB;

[0341] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.076105dB;

[0342] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.896266 dB;

[0343] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.100931dB;

[0344] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.442645dB;

[0345] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.044353 dB;

[0346] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897 dB.

[0347] In summary, through the above-mentioned first sequence, MIMO power control at 640 MHz can be achieved.

[0348] For 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU 2×996-toneRU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, etc., please refer to the above descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0349] In addition, the STF sequence corresponding to the second subcarrier distribution can be used for 640MHz bandwidth data transmission, ensuring the PAPR performance when 160, 80 and 40MHz puncturing are simultaneously achieved, thereby ensuring the improved spectrum utilization brought about by the higher-precision 40MHz puncturing.

[0350] In addition, the above-mentioned first sequence is designed based on the second seed carrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the second seed carrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0351] Specifically, another example,

[0352] or,

[0353]

[0354]

[0355] The rotation factor sequence C is {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}.

[0356] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 6.

[0357] Table 6

[0358] As shown in Table 6, for resources that meet the third sub-carrier distribution, for example:

[0359] For multiple 6×996-tone MRUs (see Figure 6 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 6.61321 dB;

[0360] For multiple 5×996+484-tone MRUs (see Figure 10 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.380306 dB;

[0361] For multiple 5×996-tone MRUs (see Figure 7 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.715047 dB;

[0362] For multiple 4×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.844529 dB;

[0363] For multiple 4×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.079005dB;

[0364] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.757834 dB;

[0365] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.413601dB;

[0366] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.768688 dB;

[0367] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.928254 dB;

[0368] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.664962dB;

[0369] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.442645dB;

[0370] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.044353 dB;

[0371] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.9897 dB.

[0372] In summary, the first sequence described above enables MIMO power control at 640 MHz. For descriptions of 4×996-tone RU, 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, and 484+242-tone MRU, refer to the descriptions of 7×996-tone MRU, 6×996-tone MRU, and 5×996-tone MRU, as well as existing standards, and are not repeated here.

[0373] In addition, the STF sequence corresponding to the third subcarrier distribution can be used for data transmission in a 640MHz bandwidth, ensuring the 480MHz transmission formed by puncturing the first 160MHz or last 160MHz of the 640MHz band. This can be applied to bandwidth-limited scenarios (for example, the maximum available bandwidth of the frequency band stipulated in some countries and regions is 500MHz). At the same time, because the bandwidth corresponding to this STF sequence is 640MHz, this STF sequence can also be used for data transmission in a 640MHz bandwidth.

[0374] In addition, the above-mentioned first sequence is designed based on the third subcarrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the third subcarrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0375] 2. The first bandwidth is 480MHz

[0376] Scenario #3: The STF sequence corresponding to the first bandwidth is designed based on the M sequence corresponding to the second bandwidth of 80 MHz.

[0377] First sequence through STF -A:B:A express.

[0378] For example, the STF corresponding to 480 MHz -A:B:A for:

[0379] Any of the above c1, c2, c3, c4, c5 and c6 represents a rotation factor, and the value is 1 or -1.

[0380] Through the above-mentioned first sequence, the embodiment of the present application can support MIMO power control at 480 MHz.

[0381] Since the first bandwidth is 480MHz and the second bandwidth is 80MHz, and the configuration in scenario #1 is not reused, there are 6 second sequences in total. Each second sequence needs to be configured with a rotation factor. The value of each rotation factor is 1 or -1, and 2 6 = 64 possible rotation factor sequences. The rotation factor sequence can be expressed as c = {±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1,±1}. For each rotation factor sequence, a first sequence can be constructed accordingly.

[0382] Due to OFDMA transmission and preamble puncturing, only a portion of the frequency domain resources (RU) or MRU) within the full bandwidth may be used for transmission. In this case, only the first sequence corresponding to the transmitted RU or MRU portion remains unchanged, while the first sequence corresponding to the punctured (not used for transmission) RU or MRU portion is reset to zero. PAPR is calculated for the partially zeroed first sequence to minimize the maximum PAPR of the STF sequence corresponding to the RU or MRU.

[0383] STF -A:B:A A possible implementation is A=3056, B=16.

[0384] Specifically, an example,

[0385] or,

[0386]

[0387] The rotation factor sequence C is {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}.

[0388] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 7.

[0389] Table 7

[0390] As shown in Table 7, for resources that meet the fourth subcarrier distribution, for example:

[0391] For a 6×996-tone RU (see Figure 6 ), the maximum PAPR corresponding to the first sequence is 7.874796884 dB;

[0392] For multiple 5×996+484-tone MRUs (see Figure 12 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.8727676 dB;

[0393] For multiple 5×996-tone MRUs (see Figure 13 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.770728723 dB;

[0394] For multiple 4×996+484-tone MRUs (see FIG14 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.704451902 dB;

[0395] For multiple 4×996-tone MRU / RU (see FIG15 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 8.938554129 dB;

[0396] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 9.147944565dB;

[0397] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.689166763dB;

[0398] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.984574974dB;

[0399] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.928254173 dB;

[0400] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.540414918 dB;

[0401] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 6.426335058 dB;

[0402] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 4.528670289 dB;

[0403] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.989700043 dB.

[0404] In addition, for the descriptions of 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, etc., please refer to the aforementioned descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0405] In summary, the first sequence described above enables MIMO power control at 480 MHz. Furthermore, the STF sequence corresponding to the fourth subcarrier distribution can be used for data transmission in a 480 MHz bandwidth, making it directly applicable to bandwidth-constrained scenarios (e.g., frequency bands in some countries with a maximum available bandwidth of 500 MHz).

[0406] In addition, the above-mentioned first sequence is designed based on the fourth subcarrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the fourth subcarrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0407] Scenario #4: The STF sequence corresponding to the first bandwidth is designed based on the M sequence corresponding to the second bandwidth of 40 MHz.

[0408] First sequence through STF -A:B:A express.

[0409] For example, the STF corresponding to 480 MHz -A:B:A for:

[0410] Any of the above c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11 and c12 represents a rotation factor, and the value is 1 or -1.

[0411] Since the first bandwidth is 480MHz and the second bandwidth is 40MHz, there are 12 second sequences in total. Each second sequence needs to be configured with a rotation factor. The value of each rotation factor is 1 or -1, and 2 12 = 4096 possible rotation factor sequences. The rotation factor sequence can be expressed as c = {±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1}. For each rotation factor sequence, a first sequence can be constructed accordingly.

[0412] Due to OFDMA transmission and preamble puncturing, only a portion of the frequency domain resources RU or MRU within the complete bandwidth may be used for transmission. At this time, only the first sequence corresponding to the transmitted RU or MRU portion remains unchanged, and the first sequence corresponding to the punctured (not used for transmission) RU or MRU portion will be set to zero (in other words, the values ​​of the elements included in the first sequence and the values ​​of the elements corresponding to the unpunctured RU / MRU are mapped to the subcarriers corresponding to the RU / MRU for transmission, and the values ​​carried on the subcarriers included in the punctured RU / MRU are zero). The PAPR of the first sequence after the partial zeroing operation is calculated to minimize the maximum PAPR of the STF sequence corresponding to the RU or MRU.

[0413] Specifically, an example,

[0414] or,

[0415]

[0416] The rotation factor sequence C is {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}.

[0417] In this implementation, the PAPR performance of the first sequence is better, thereby being able to support MIMO power control under a larger bandwidth. For a description of the above beneficial effects, please refer to Table 8.

[0418] Table 8

[0419] As shown in Table 8, for resources that meet the fourth sub-carrier distribution:

[0420] For a 6×996-tone RU (see Figure 6 ), the maximum PAPR corresponding to the first sequence is 6.535922656 dB;

[0421] For multiple 5×996+484-tone MRUs (see Figure 12 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.992143817 dB;

[0422] For multiple 5×996-tone MRUs (see FIG13 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.300210429 dB;

[0423] For multiple 4×996+484-tone MRUs (see FIG14 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.934852565 dB;

[0424] For multiple 4×996-tone MRU / RU (see FIG15 ), the maximum value among the multiple PAPRs corresponding to the first sequence is 7.362805143 dB;

[0425] For multiple 3×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.734484769dB;

[0426] For multiple 3×996-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.590650462dB;

[0427] For multiple 2×996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.005328907 dB;

[0428] For multiple 2×996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.896266286dB;

[0429] For multiple 996+484+242-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 8.100931031 dB;

[0430] For multiple 996+484-tone MRUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 7.44264489 dB;

[0431] For multiple 996-tone RUs, the maximum value among the multiple PAPRs corresponding to the first sequence is 5.044352728 dB;

[0432] For multiple 484+242-tone MRUs, the maximum value among multiple PAPRs corresponding to the first sequence is 6.989700043 dB.

[0433] In addition, for the descriptions of 3×996+484-tone MRU, 3×996-tone MRU, 2×996+484-tone MRU, 2×996-tone RU, 996+484+242-tone MRU, 996+484-tone MRU, 996-tone RU, etc., please refer to the aforementioned descriptions of 7×996-tone MRU, 6×996-tone MRU, 5×996-tone MRU, etc. and existing standards, which are not repeated here.

[0434] Through the above-mentioned first sequence, the embodiment of the present application can support MIMO power control under 480 MHz bandwidth.

[0435] In addition, the STF sequence corresponding to the fourth subcarrier distribution can be used for data transmission in a 480 MHz bandwidth and can be directly applied to bandwidth-limited scenarios (eg, the maximum available bandwidth of a frequency band specified in some countries and regions is 500 MHz).

[0436] In addition, the above-mentioned first sequence is designed based on the fourth subcarrier distribution. When it is transmitted on the subcarriers included in the resources (such as RU or MRU) in the fourth subcarrier distribution, the PAPR performance of the first sequence is better, and it can support MIMO power control under a larger bandwidth.

[0437] S1602. The first device sends a non-TB PPDU to the second device through the first bandwidth.

[0438] Accordingly, the second device receives the non-TB PPDU through the first bandwidth.

[0439] S1603: The second device processes the non-TB PPDU.

[0440] After the second device receives the non-TB PPDU through the first bandwidth, the second device processes the non-TB PPDU and may perform MIMO power control using an STF sequence in the non-TB PPDU.

[0441] Thus, through the above technical solution, the present application can support MIMO power control under a larger bandwidth.

[0442] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software 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 beyond the scope of this application.

[0443] The device provided in this application is described below with reference to Figures 17 to 19. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, and for matters not described in detail, reference can be made to the method embodiment above. For the sake of brevity, some contents are not repeated here.

[0444] In the embodiment of the present application, the functional modules of the first device or the second device can be divided according to the above-mentioned method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that 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.

[0445] Figure 17 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown in Figure 17, the communication device may include a transceiver unit 1710 and a processing unit 1720. The transceiver unit 1710 can communicate with the outside world, and the processing unit 1720 is used to process data. The transceiver unit 1710 may also be referred to as a communication interface or a communication unit.

[0446] Optionally, the communication device may further include a storage unit, which may be used to store instructions and / or data. The processing unit 1720 may read the instructions and / or data in the storage unit so that the communication device implements the aforementioned method embodiment.

[0447] In the first design, the communication device may be the first device in the aforementioned embodiment, or may be a component (e.g., a chip) of the first device. The communication device may implement steps or processes corresponding to those performed by the first device in the above method embodiment, wherein the transceiver unit 1710 may be configured to perform the transceiver-related operations of the first device in the above method embodiment, and the processing unit 1720 may be configured to perform the processing-related operations of the first device in the above method embodiment.

[0448] In one possible implementation, the processing unit 1720 is configured to generate a non-TB PPDU for a first bandwidth, where the non-TB PPDU includes an STF for carrying a first sequence; and the transceiver unit 1710 is configured to send the non-TB PPDU via the first bandwidth.

[0449] In a second design, the communication device may be the second device in the aforementioned embodiment, or may be a component (such as a chip) of the second device.

[0450] The communication device can implement steps or processes corresponding to those executed by the second device in the above method embodiment, wherein the transceiver unit 1710 can be used to execute transceiver-related operations of the second device in the above method embodiment, and the processing unit 1720 can be used to execute processing-related operations of the second device in the above method embodiment.

[0451] In a possible implementation, the transceiver unit 1710 is configured to receive the non-TB PPDU through a first bandwidth; and the processing unit 1720 is configured to process the non-TB PPDU.

[0452] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0453] It should also be understood that the communication device here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the communication device may be specifically the first device in the above-mentioned embodiment, which may be used to execute the various processes and / or steps corresponding to the first device in the above-mentioned method embodiments; or, the communication device may be specifically the second device in the above-mentioned embodiment, which may be used to execute the various processes and / or steps corresponding to the second device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here. The above-mentioned transceiver unit 1710 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit 1720 may be a processing circuit.

[0454] The communication device in FIG17 may be a device in the aforementioned embodiment, or may be a chip or chip system, such as a system on a chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0455] The communication devices of each of the above-mentioned schemes have the function of implementing the corresponding steps performed by the first device or the second device in the above-mentioned method. The functions can be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the sending and receiving operations and related processing operations in each method embodiment.

[0456] Figure 18 is a schematic block diagram of another communication device provided in an embodiment of the present application. The communication device includes a processor 1810, which is configured to execute computer programs or instructions stored in a memory 1820, or read data / signaling stored in the memory 1820, to perform the methods described in the above method embodiments. Optionally, there are one or more processors 1810.

[0457] Optionally, as shown in FIG18 , the communication device further includes a memory 1820, which is used to store computer programs or instructions and / or data. The memory 1820 can be integrated with the processor 1810, or can be separately provided. Optionally, there are one or more memories 1820.

[0458] Optionally, as shown in Figure 18, the communication device further includes a transceiver 1830, which is used to receive and / or send signals. For example, the processing 1810 is used to control the transceiver 1830 to receive and / or send signals.

[0459] As a solution, the communication apparatus is used to implement the operations performed by the first device in each of the above method embodiments.

[0460] For example, the processor 1810 is configured to execute computer programs or instructions stored in the memory 1820 to implement the relevant operations of the first device in each of the above method embodiments. For example, the method executed by the first device in the embodiment shown in FIG16 .

[0461] As another solution, the communication device is used to implement the operations performed by the second device in the above various method embodiments.

[0462] For example, the processor 1810 is configured to execute computer programs or instructions stored in the memory 1820 to implement the relevant operations of the second device in each of the above method embodiments. For example, the method executed by the second device in the embodiment shown in FIG16 .

[0463] The processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0464] The memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. As an example and not a limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM).

[0465] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0466] It should also be noted that the memory described herein is intended to comprise, but not be limited to, these and any other suitable types of memory.

[0467] 19 is a schematic block diagram of a chip system provided by an embodiment of the present application. The chip system (or also referred to as a processing system) includes a logic circuit 1910 and an input / output interface 1920.

[0468] Logic circuit 1910 may be a processing circuit in a chip system. Logic circuit 1910 may be coupled to a storage unit and call instructions in the storage unit, enabling the chip system to implement the methods and functions of various embodiments of the present application. Input / output interface 1920 may be an input / output circuit in a chip system, outputting information processed by the chip system or inputting data or signaling information to be processed into the chip system for processing.

[0469] Specifically, for example, if the chip system is installed in the first device, the logic circuit 1910 is coupled to the input / output interface 1920, and the logic circuit 1910 can send the non-TB PPDU through the input / output interface 1920. The non-TB PPDU can be generated by the logic circuit 1910. For another example, if the chip system is installed in the second device, the logic circuit 1910 is coupled to the input / output interface 1920, and the logic circuit 1910 can receive the non-TB PPDU through the input / output interface 1920, and the logic circuit 1910 processes the non-TB PPDU.

[0470] As a solution, the chip is used to implement the operations performed by the first device in each of the above method embodiments.

[0471] For example, the logic circuit 1910 is used to implement the processing-related operations performed by the first device in the above method embodiments, such as the processing-related operations performed by the first device in the embodiment shown in Figure 16; the input / output interface 1920 is used to implement the sending and / or receiving-related operations performed by the first device in the above method embodiments, such as the sending and / or receiving-related operations performed by the first device in the embodiment shown in Figure 16.

[0472] As another solution, the chip system is used to implement the operations performed by the second device in each of the above method embodiments.

[0473] For example, the logic circuit 1910 is used to implement the processing-related operations performed by the second device in the above method embodiments, such as the processing-related operations performed by the second device in the embodiment shown in Figure 16; the input / output interface 1920 is used to implement the sending and / or receiving-related operations performed by the second device in the above method embodiments, such as the sending and / or receiving-related operations performed by the second device in the embodiment shown in Figure 16.

[0474] The chip system may be a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip including a modem core.

[0475] An embodiment of the present application further provides a computer-readable storage medium on which computer instructions for implementing the methods executed by the device in the above-mentioned method embodiments are stored.

[0476] For example, when the computer program is executed by a computer, the computer can implement the method performed by the first device in each embodiment of the above method.

[0477] For another example, when the computer program is executed by a computer, the computer can implement the method performed by the second device in each embodiment of the above method.

[0478] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed by a computer, implement the methods performed by a device (such as the first device or the second device) in the above-mentioned method embodiments.

[0479] An embodiment of the present application also provides a communication system, including the aforementioned first device and second device.

[0480] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0481] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only 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 system, or some features can be ignored or not executed. In addition, 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.

[0482] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. 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 by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the available medium includes, but is not limited to, various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0483] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art 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. A communication method, characterized in that: include: Generate a non-trigger physical layer protocol data unit non-TB PPDU corresponding to a first bandwidth, wherein the non-TB PPDU includes a short training field for carrying a first sequence, wherein the first sequence is a sequence based on a rotation factor and an M sequence, and the M sequence is {-1,-1,-1,1,1,1,-1,1,1,-1,1,1,-1,1}; The non-TB PPDU is sent via the first bandwidth, and the first bandwidth is greater than 320 MHz.

2. A communication method, characterized in that: include: receiving a non-TB PPDU through a first bandwidth, the non-TB PPDU comprising a short training field for carrying a first sequence, the first sequence being a sequence based on a rotation factor and an M sequence, the M sequence being {-1,-1,-1,1,1,1,-1,1,1,-1,1,1,-1,1}, and the first bandwidth being greater than 320 MHz; Process the non-TB PPDU.

3. The method according to claim 1 or 2, characterized in that: The first bandwidth is 640 MHz, and the first sequence is: Among them, any one of c1, c2, c3, c4, c5, c6, c7 and c8 represents a rotation factor, and the value is 1 or -1.

4. The method according to claim 1 or 2, characterized in that: The first bandwidth is 640 MHz, and the first sequence is: Among them, any one of c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12, c13, c14, c15 and c16 represents a rotation factor, and the value is 1 or -1.

5. The method according to claim 1 or 2, characterized in that: The first bandwidth is 480 MHz, and the first sequence is: Among them, any one of c1, c2, c3, c4, c5 and c6 represents a rotation factor, and the value is 1 or -1.

6. The method according to claim 1 or 2, characterized in that: The first bandwidth is 480 MHz, and the first sequence is: Among them, any one of c1, c2, c3, c4, c5, c6, c7, c8, c9, c10, c11 and c12 represents a rotation factor, and the value is 1 or -1.

7. The method according to claim 3, characterized in that The first sequence is: or, or, or, or, or, 8. The method according to claim 4, characterized in that The first sequence is: or, or, or, or, or, 9. The method according to claim 5, characterized in that The first sequence is: or, 10. The method according to claim 6, characterized in that The first sequence is: or, 11. A communication device, characterized in that: The communication device comprises means for performing the method according to any one of claims 1 to 10.

12. A communication device, characterized in that: include: A processor, configured to execute computer instructions stored in the memory, so that the communication device performs the method according to any one of claims 1 to 10.

13. The communication device according to claim 12, characterized in that: The communication device further comprises the memory.

14. The communication device according to claim 12 or 13, characterized in that: The communication device further includes a communication interface, which is coupled to the processor and is used to input and / or output information.

15. A computer-readable storage medium, characterized in that: Used to store a computer program, the computer program comprising instructions for implementing the method according to any one of claims 1 to 10.

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