Communication method and device

Abstract

The invention relates to a communication method and equipment. The communication method comprises the steps that the communication device sends and / or receives first information, and the first information is used for expanding the range (ER). According to the embodiment of the invention, the transmission distance can be expanded.

Description

Communication method and device Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a communication method and device. Background Art

[0002] Communication standards include multiple types of RUs (Resource Units), including MRUs (Multiple Resource Units) composed of multiple RUs. For outdoor scenarios, some RUs have lower data rates when their uplink transmission distance is longer, while their maximum data rates are higher when their uplink transmission distance is shorter. Therefore, long-distance, high-data-rate transmission scenarios may be difficult to meet.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide a connection configuration method and a terminal.

[0005] An embodiment of the present application provides a communication method, including:

[0006] The communication device sends and / or receives first information, where the first information is used to extend the range ER.

[0007] The present application also provides a communication device, including:

[0008] The communication unit is configured to send and / or receive first information, where the first information is used to extend the range ER.

[0009] An embodiment of the present application further provides a communication device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory so that the communication device executes the above method.

[0010] An embodiment of the present application also provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the above method.

[0011] An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, which enables a device to execute the above method when the computer program is executed by the device.

[0012] An embodiment of the present application also provides a computer program product, including computer program instructions, which enable a computer to execute the above method.

[0013] An embodiment of the present application also provides a computer program, which enables a computer to execute the above method.

[0014] In the embodiment of the present application, the transmission distance can be extended through the first information. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of an application scenario according to an embodiment of the present application.

[0016] FIG2 is a schematic diagram of a HEER SU PPDU format.

[0017] FIG3 is a schematic flowchart of a communication method according to an embodiment of the present application.

[0018] FIG4 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0019] FIG5 is a schematic diagram of an example distributed RU.

[0020] FIG6 is a diagram showing an overall structure of an exemplary UHT ER PPDU.

[0021] FIG. 7 is a diagram showing an example structure of UHT ER PPDU format 1. FIG.

[0022] FIG8 is a structural diagram of an example U-SIG field.

[0023] FIG. 9 is a diagram showing an example structure of the UHT-SIG field.

[0024] FIG. 10 is a diagram showing an example structure of UHT ER PPDU format 2.

[0025] FIG11 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0026] FIG12 is a schematic block diagram of a chip according to an embodiment of the present application.

[0027] FIG13 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0029] The abbreviations and Chinese and English meanings of some nouns involved in the embodiments of this application can be found in the table below.

[0030] Abbreviation Chinese full name English full name PPDU Physical Layer Protocol Data Unit IEEE Institute of Electrical and Electronics Engineers RU Resource unit MRU Multiple resource unit AP Access point STA Station

[0031] BSS Basic service set TXOP Transmission opportunity PSD Power Spectral Density DCM Dual carrier modulation UMi Urban Microcell NLoS Non-line of sight HE High throughput EHT Extremely high throughput UHT Ultra-High Throughput PPDU Physical Layer Protocol Data Unit CRC Cyclic redundancy code DL Downlink UL Uplink BW Bandwidth GI Guard interval MCS Modulation and coding scheme OFDMA Orthogonal frequency division multiple access MU Multi-user MIMO Multiple Input Multiple Output RF Radio Frequency DC Direct current TB Trigger based L-LTF Non-HT Long Training field L-STF Non-HT Short Training L-SIG Non-HT SIGNAL field RL-SIG Repeated L-SIG EHT-SIG Extremely High Throughput Signal Field EHT SIGNAL field U-SIG Universal SIGNAL field EHT-STF Extremely High Throughput Short Training field EHT-LTF Extremely High Throughput Long Training field EHT Long Training field UHT-SIG Ultra-High Throughput Signal Field UHT SIGNAL field UHT-STF Ultra-High Throughput Short Training field UHT-LTF Ultra-High Throughput Long Training field UHT-LTF Ultra-High Throughput Long Training field UHT Long TrainingPE Packet Extension field BPSK Binary Phase Shift Keying QBPSK Quadrature Binary Phase Shift Keying QPSK Quadrature Phase Shift Keying SNR Signal to Noise Ratio

[0032] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless local area network (WLAN), wireless fidelity (WiFi) or other communication systems.

[0033] For example, a communication system 100 used in an embodiment of the present application is shown in FIG1 . The communication system 100 may include an access point (AP) 110 and a station (STA) 120 that accesses a network through the access point 110 .

[0034] In some scenarios, an AP is also called an AP STA. In a sense, an AP is also a STA.

[0035] In some scenarios, a STA is also called a non-AP STA.

[0036] The communication in the communication system 100 can be communication between an AP and a non-AP STA, communication between a non-AP STA and a non-AP STA, or communication between a STA and a peer STA, where a peer STA may refer to a device that communicates with the STA peer, for example, the peer STA may be an AP or a non-AP STA.

[0037] An AP acts as a bridge between wired and wireless networks, connecting wireless network clients and then connecting the wireless network to the Ethernet. An AP can be a terminal device (such as a mobile phone) or a network device (such as a router). This terminal device or network device contains a chip that enables communication, such as a WLAN or WiFi chip.

[0038] It should be understood that the role of STA in the communication system is not absolute. For example, in some scenarios, when a mobile phone is connected to a router, the mobile phone is a non-AP STA. When the mobile phone serves as a hotspot for other mobile phones, the mobile phone plays the role of AP.

[0039] APs and non-AP STAs can be devices used in the Internet of Vehicles, IoT nodes and sensors in the Internet of Things (IoT), smart cameras, smart remote controls, smart water and electricity meters in smart homes, and sensors in smart cities.

[0040] In some embodiments, a non-AP STA may support 802.11be. A non-AP STA may also support various current and future 802.11 family wireless local area network (WLAN) standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0041] In some embodiments, the AP may be a device supporting the 802.11be standard. The AP may also be a device supporting various current and future 802.11 family WLAN standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0042] In the embodiment of the present application, the STA may be a mobile phone, tablet computer, computer, virtual reality (VR) device, augmented reality (AR) device, wireless device in industrial control, set-top box, wireless device in self-driving, in-vehicle communication device, wireless device in remote medical, wireless device in smart grid, wireless device in transportation safety, wireless device in smart city or smart home, wireless communication chip / ASIC / SOC / etc. that supports WLAN / WiFi technology.

[0043] The frequency bands supported by WLAN technology may include but are not limited to: low frequency bands (such as 2.4 GHz, 5 GHz, and 6 GHz) and high frequency bands (such as 45 GHz and 60 GHz).

[0044] FIG1 exemplarily shows one AP STA and two non-AP STAs. Optionally, the communication system 100 may include multiple AP STAs and other numbers of non-AP STAs, which is not limited in the embodiments of the present application.

[0045] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0046] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0047] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0048] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0049] A HE (High Throughput) ER (Extended Range) SU (Single-User) PPDU (Physical Layer Protocol Data Unit) is used to extend the transmission distance (also known as extended range or extended range, etc.). An example of the format of a HE ER SU PPDU is shown in Figure 2. The HE ER SU PPDU is used for single-user transmission. Among them, the L-STF (Non-HT Short Training) field, the L-LTF (Non-HT Long Training) field, the L-SIG (Non-HT SIGNAL) field, the HE-SIG-A field, and the HE-SIG-B field are referred to as the pre-HE (high throughput) modulation field; the HE-STF (high throughput short training) field, the HE-LTF (high throughput long training) field, the Data field, and the PE (Package Extend) field are referred to as the HE modulation field.

[0050] The main working principle of HEERSU PPDU to extend the transmission distance is as follows:

[0051] 1) L-STF and L-LTF fields, power increased by 3dB;

[0052] 2) L-SIG is repeatedly sent in the time domain, i.e., L-SIG+RL-SIG mode, to improve the PER of L-SIG;

[0053] 3) HE-SIG-A is repeatedly transmitted in the time domain and specifically includes four subfields: HE-SIG-A1, HE-SIG-A1-R, HE-SIG-A2, and HE-SIG-A2-R. Each subfield contains 26 data bits.

[0054] -R (Repeat) indicates repetition. HE-SIG-A1-R is a duplicate of HE-SIG-A1, and HE-SIG-A2-R is a duplicate of HE-SIG-A2. The combined replication pattern can achieve power gain.

[0055] In addition, the data bits in HE-SIG-A1 and HE-SIG-A2 are encoded using BCC (binary convolutional codes) with a code rate of 1 / 2, and are mapped to BPSK (binary phase shift keying) constellation points after passing through a BCC interleaver. HE-SIG-A1-R does not pass through an interleaver and is mapped to QBPSK (quadrature binary phase shift keying) constellation points (to distinguish HE SU PPDUs); HE-SIG-A2-R does not pass through an interleaver and is mapped to BPSK constellation points. Different interleaving schemes can achieve additional frequency diversity gain.

[0056] 4) HE-STF and HE-LTF fields, power increased by 3dB.

[0057] For example, HEER SU PPDUs are allowed to be transmitted on higher-frequency RU106 (RU with 106 subcarriers or 106-tone RU) or RU242 (RU with 242 subcarriers or 242-tone RU) in the primary 20 MHz channel. Specifically, when a HEER SU PPDU is transmitted on RU106, if the MCS (Modulation and Coding Scheme) is 0, DCM (Dual Carrier Modulation) can be used. When a HEER SU PPDU is transmitted on RU242, if the MCS is 0, 1, or 2, DCM can be used, and both can only be transmitted on one spatial stream.

[0058] For example, using the path loss model for an outdoor UMi (Urban Microcell) NLoS (Non-line of sight) scenario, the corresponding uplink transmission distance is calculated based on the maximum data rate of the HEER SU PPDU on its allowed RU, as shown in Table 1.

[0059] Table 1 Data rate and uplink transmission distance of HEER SU PPDU in outdoor scenarios

[0060]

[0061] As shown in Table 1, for outdoor scenarios, the RU106 has a maximum data rate of 3.8 Mb / s, corresponding to an uplink transmission distance of 52.5 m, which is relatively low. The RU242 has a maximum data rate of 25.8 Mb / s, corresponding to an uplink transmission distance of 38.4 m, which is relatively short. This may make it difficult to meet the requirements of long-distance, high-data-rate transmission scenarios, such as outdoor video surveillance.

[0062] FIG3 is a schematic flow chart of a communication method 300 according to an embodiment of the present application. The method may optionally be applied to the system shown in FIG1 , but is not limited thereto. The method includes at least part of the following contents:

[0063] S310: A communication device sends and / or receives first information, where the first information is used for extending the range (ER).

[0064] In embodiments of the present application, communication devices may include access point stations (APs) and / or non-access point stations (STAs). To ensure transmission distance and data transmission rate, APs and STAs may communicate via first information. For example, an AP may send first information to a STA; the AP may also receive first information sent by a STA. For another example, a STA may send first information to an AP; the STA may also receive first information sent by the AP.

[0065] In one embodiment, the first information is a physical layer protocol data unit (PPDU).

[0066] In one embodiment, the bandwidth of the PPDU may be 20 MHz, 40 MHz, or 80 MHz. In the embodiments of the present application, the specific bandwidth value of the PPDU is not limited. Among them, the effect of extending the range of the PPDU with a bandwidth of 20 MHz is more obvious.

[0067] In one embodiment, the PPDU is a UHT (Ultra-High Throughput) ER PPDU, which can be used in scenarios such as ultra-high throughput and long-distance transmission.

[0068] In one embodiment, the resource unit RU allocation mode of the PPDU includes a non-distributed RU allocation mode and / or a distributed RU allocation mode.

[0069] In an embodiment of the present application, the RU allocation mode may be referred to as the RU mode, the non-distributed RU allocation mode may be referred to as the conventional RU allocation mode, the conventional RU mode or the non-distributed RU mode, and the distributed RU allocation mode may be referred to as the distributed RU mode. The distributed RU allocation mode may be adopted to map the RUs of the PPDU to the overall bandwidth of the distributed PPDU. For example, the continuous physical subcarrier indexes of the non-distributed RU are mapped to non-continuous physical subcarrier indexes to obtain a distributed RU. The physical subcarrier indexes of the distributed RU are distributed over the overall bandwidth of the PPDU, for example, 20 MHz. The non-distributed RU allocation mode may be adopted, for example, the conventional RU allocation mode in the IEEE802.11be standard, and allocated according to the non-distributed RU.

[0070] In one embodiment, in the distributed RU allocation mode, the PPDU is allowed to be transmitted on a RU of 106 subcarriers (which may be referred to as a 106-tone RU or RU106) and / or a MRU of 106 subcarriers + 26 subcarriers (which may be referred to as a 106+26-tone MRU or MRU106+26). For example, RU106 may be a 106-tone RU in the upper frequency domain within a 20 MHz bandwidth; MRU106+26 may be a 106+26-tone MRU in the upper frequency domain within a 20 MHz bandwidth.

[0071] In one embodiment, in the non-distributed RU allocation mode, the PPDU is allowed to be transmitted on at least one of a RU of 106 subcarriers, a MRU of 106 subcarriers + 26 subcarriers, and a RU of 242 subcarriers (hereinafter referred to as a 242-tone RU or RU242). For example, contiguous subcarriers in RU106 or MRU106+26 are mapped to non-contiguous subcarriers within a 20 MHz bandwidth according to a pre-specified mapping rule.

[0072] In the above RU allocation mode, the types of RUs allowed for PPDU transmission are only examples and not limitations. Other types of RUs may also be used according to actual scenarios. For example, RU26 (which may be called a 26-subcarrier RU or a 26-tone RU), RU52 (a 52-subcarrier RU or a 52-tone RU), MRU52+26 (a 52-subcarrier + 26-subcarrier RU or a 52+26-tone RU), etc. may be used to transmit UHT ER PPDU.

[0073] In one embodiment, the PPDU may allow different modulation and coding schemes to be used in different RU allocation modes. For example, the distributed RU allocation mode and the non-distributed RU allocation mode may each have a corresponding modulation and coding scheme.

[0074] In one embodiment, in the distributed RU allocation mode, the modulation and coding schemes allowed for the PPDU include at least one of the following:

[0075] MCS 0: BPSK modulation, code rate 1 / 2;

[0076] MCS 1: QPSK (Quadrature Phase Shift Keying) modulation, code rate 1 / 2;

[0077] MCS 2: QPSK modulation, code rate 3 / 4;

[0078] MCS 15: BPSK-DCM modulation, code rate 1 / 2.

[0079] For example, in the distributed RU allocation mode, when the UHT ER PPDU is transmitted on RU106 or MRU106+26, the modulation and coding scheme allowed to be used is at least one of MCS 0, MCS1, MCS2 and MCS15.

[0080] In one embodiment, the modulation and coding scheme in the non-distributed RU allocation mode includes at least one of the following:

[0081] The modulation and coding scheme allowed for transmission of the PPDU on a RU of 106 subcarriers and / or a MRU of 106 subcarriers + 26 subcarriers is at least one of MCS 0 and MCS 15;

[0082] The modulation and coding scheme allowed for transmission of the PPDU on an RU of 242 subcarriers is at least one of MCS 0, MCS1, MCS2, and MCS15.

[0083] In one embodiment, the PPDU includes a Signal (SIG) field for carrying information for decoding the PPDU.

[0084] In this embodiment of the present application, the SIG field may include information for decoding the PPDU.

[0085] In one embodiment, the SIG field includes a Universal SIGNAL (U-SIG) field.

[0086] In one embodiment, the SIG field further includes a UHT-SIG (UHT SIGNAL, ultra-high throughput signal) field.

[0087] For example, in format 1 of the UHT ER PPDU, information on decoding the PPDU is indicated by both the U-SIG field and the UHT-SIG field. For another example, in format 2 of the UHT ER PPDU, information on decoding the PPDU is indicated solely by the U-SIG field. Depending on the SIG field, and considering signaling overhead and receiver complexity, a variety of different UHT ER PPDU formats can be provided, such as:

[0088] Format 1: The U-SIG field and the UHT-SIG field are modulated using BPSK-DCM with a code rate of 1 / 2.

[0089] Format 2: Mode of the U-SIG field.

[0090] In one embodiment, the U-SIG field includes: a first subfield for indicating the RU allocation mode and RU allocation information.

[0091] In one embodiment, the value of the first subfield indicates at least one of the following:

[0092] Distributed RU of 106 subcarriers;

[0093] Distributed 106 subcarriers + MRU of 26 subcarriers;

[0094] Non-distributed RU with 106 subcarriers;

[0095] Non-distributed 106 subcarriers + 26 subcarrier MRU;

[0096] Non-distributed RU of 242 subcarriers;

[0097] reserve.

[0098] In one embodiment, the distributed RU of 106 subcarriers includes subcarriers after distributed mapping of the RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0099] The distributed MRU of 106 subcarriers + 26 subcarriers includes subcarriers after distributed mapping of the MRU of 106 subcarriers + 26 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0100] The non-distributed RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0101] The non-distributed MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

[0102] In an embodiment of the present application, the first subfield can simultaneously indicate the RU allocation mode and RU allocation information. Different values ​​of the first subfield correspond to different RU allocation modes and RU allocation information. For example, the first subfield can be the bandwidth subfield of the UHT ER PPDU. The value of the Bandwidth subfield is 0, which indicates the subcarriers after distributed mapping of the upper frequency domain 106-tone RU within the 20MHz bandwidth. The value of the Bandwidth subfield is 1, which indicates the subcarriers after distributed mapping of the upper frequency domain 106+26-tone MRU within the 20MHz bandwidth. The value of the Bandwidth subfield is 2, which indicates the upper frequency domain 106-tone RU within the 20MHz bandwidth. The value of the Bandwidth subfield is 3, which indicates the upper frequency domain 106+26-tone MRU within the 20MHz bandwidth. The field name, value and corresponding meaning of the above-mentioned first subfield are only examples and not limitations, and can be flexibly set according to actual usage requirements.

[0103] In one embodiment, the U-SIG field includes:

[0104] A second subfield for indicating RU allocation information;

[0105] The third subfield is used to indicate the RU allocation mode.

[0106] In one embodiment, the value of the second subfield indicates at least one of the following:

[0107] RU of 106 subcarriers;

[0108] 106 subcarriers + MRU of 26 subcarriers;

[0109] RU of 242 subcarriers;

[0110] reserve.

[0111] In one embodiment, the RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0112] The MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

[0113] In an embodiment of the present application, in the U-SIG field, the RU allocation mode and RU allocation information can be indicated respectively by two subfields.

[0114] For example, the second subfield used to indicate RU allocation information can be the Bandwidth subfield of the UHT ER PPDU. A Bandwidth subfield value of 0 indicates a 106-tone RU in the upper frequency domain within a 20 MHz bandwidth. A Bandwidth subfield value of 1 indicates a 106+26-tone MRU in the upper frequency domain within a 20 MHz bandwidth. A Bandwidth subfield value of 2 indicates a 242-tone RU in the upper frequency domain within a 20 MHz bandwidth.

[0115] In one embodiment, the value of the third subfield indicates at least one of the following:

[0116] Non-distributed RU allocation mode;

[0117] Distributed RU allocation mode.

[0118] For example, the third subfield used to indicate the RU allocation mode can be the bandwidth RU allocation mode (RU allocation mode) subfield of the UHT ER PPDU. The value of the RU allocation mode subfield is 0, indicating non-distributed RU allocation mode. The value of the RU allocation mode subfield is 1, indicating distributed RU allocation mode.

[0119] The field names, values ​​and corresponding meanings of the above-mentioned second subfield and / or third subfield are only examples and not limitations, and can be flexibly set according to actual usage requirements.

[0120] In one embodiment, when the second subfield indicates an RU with 242 subcarriers, the third subfield indicates a non-distributed RU allocation mode. For example, when the value of the Bandwidth subfield in the UHT ER PPDU is 2 (RU242), the value of the RU allocation mode subfield can only indicate a non-distributed RU allocation mode, for example, the value of the RU allocation mode subfield can only be 0. If the value of the RU allocation mode subfield is 1, it indicates a validated reserved field.

[0121] In one embodiment, if the U-SIG field and the UHT-SIG field are used to indicate information for decoding a PPDU, the UHT-SIG field includes a fourth subfield for indicating the MCS used in the data field of the PPDU.

[0122] In the embodiment of the present application, the UHT-SIG field may mainly include a common field and a user field. The UHT-SIG field may also include fields such as CRC and Tail.

[0123] For example, in the user field, the fourth subfield may be an MCS subfield, indicating the MCS used in the UHT ER PPDU data field. For example, a value of 0 in the MCS subfield indicates that the modulation and coding scheme used in the UHT ER PPDU data field is MCS 0. A value of 1 in the MCS subfield indicates that the modulation and coding scheme used in the UHT ER PPDU data field is MCS 1. A value of 2 in the MCS subfield indicates that the modulation and coding scheme used in the UHT ER PPDU data field is MCS 2. A value of 3 in the MCS subfield indicates that the modulation and coding scheme used in the UHT ER PPDU data field is MCS 15. The field name, value, and corresponding meaning of the fourth subfield described above are examples only and are not limitations, and can be flexibly set according to actual usage requirements.

[0124] In one embodiment, if the U-SIG field and the UHT-SIG field are used to indicate information for decoding the PPDU, the U-SIG field further includes: a fifth subfield for indicating a modulation and coding scheme used by the UHT-SIG field.

[0125] In one implementation, the value of the fifth subfield indicates at least one of the following:

[0126] MCS 15: BPSK-DCM, code rate 1 / 2;

[0127] reserve.

[0128] In one example, in format 1, if the UHT ER PPDU includes a U-SIG field and a UHT-SIG field, the U-SIG field may include a fifth subfield for indicating the modulation and coding scheme of the UHT-SIG field. For example, the fifth subfield may be a UHT-SIG MCS subfield. In order to achieve the same gain as the copy structure in the U-SIG, the UHT-SIG MCS subfield takes a value of 0, which may indicate that the modulation and coding scheme is MCS 15, BPSK-DCM is used for modulation and coding, and the code rate is 1 / 2. The field name, value, and corresponding meaning of the above-mentioned fifth subfield are only examples and not limitations, and can be flexibly set according to actual usage requirements.

[0129] In one implementation, if the U-SIG field is used to separately indicate information for decoding a PPDU, the U-SIG field further includes: a fourth subfield for indicating the MCS used in the data field of the PPDU.

[0130] For example, in format 2, the U-SIG field in the UHT ER PPDU can separately indicate the RU allocation mode, RU allocation information, and the MCS used in the data field of the PPDU. For example, the first subfield, such as the Bandwidth subfield, simultaneously indicates the RU allocation mode and RU allocation information. The fourth subfield, such as the MCS subfield, indicates the MCS used in the data field of the PPDU.

[0131] In one embodiment, when the value of the first subfield indicates a non-distributed RU of 106 subcarriers, the value of the fourth subfield indicates MCS 0 or 15; and / or, when the value of the first subfield indicates a non-distributed MRU of 106 subcarriers + 26 subcarriers, the value of the fourth subfield indicates MCS 0 or 15.

[0132] For example, if the value of the Bandwidth subfield is 2, it indicates non-distributed RU106, or if the value of the Bandwidth subfield is 3, it indicates non-distributed MRU106+26. If the value of the MCS subfield is 0 or 3, it indicates that the modulation and coding scheme can use MCS 0 or MCS 15. If the value of the MCS subfield is 1 or 2, it indicates Validated.

[0133] For example, in format 2, the RU allocation mode and RU allocation information can be indicated by two subfields of the U-SIG field in the UHT ER PPDU. For example, the RU allocation information is indicated by the second subfield, such as the Bandwidth subfield. The RU allocation information is indicated by the third subfield, such as the RU allocation mode subfield. The MCS used in the data field of the PPDU is indicated by the fourth subfield, such as the MCS subfield.

[0134] In one implementation, the value of the fourth subfield indicates at least one of the following:

[0135] MCS 0: BPSK modulation, code rate 1 / 2;

[0136] MCS 1: QPSK modulation, code rate 1 / 2;

[0137] MCS 2: QPSK modulation, code rate 3 / 4;

[0138] MCS 15: BPSK-DCM modulation, code rate 1 / 2;

[0139] reserve.

[0140] In one embodiment, when the value of the second subfield indicates an RU of 106 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15; and / or, when the value of the second subfield indicates an MRU of 106 subcarriers + 26 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15.

[0141] For example, if the value of the second subfield Bandwidth is 0 or 1, and the value of the third subfield RU allocation mode is 0 (indicating non-distributed RU106 or non-distributed MRU106+26), the fourth subfield can only indicate MCS 0 or 15. If the value in the MCS subfield is 1 or 2, it indicates Validated.

[0142] In one embodiment, the OFDM (Orthogonal Frequency Division Multiplexing) symbol included in the U-SIG field is at least one of U-SIG-1, U-SIG-1-R, U-SIG-2, and U-SIG-2-R. -R (Repeat) indicates repetition. For example, U-SIG-1-R is a symbol that repeats U-SIG-1, and U-SIG-2-R is a symbol that repeats U-SIG-2.

[0143] In one embodiment, the OFDM symbols included in the U-SIG field are coded using BCC and a code rate of 1 / 2.

[0144] In one embodiment, the U-SIG-1 and the U-SIG-1-R carry the same bit information, and the U-SIG-2 and the U-SIG-2-R carry the same bit information.

[0145] In one embodiment, the U-SIG-1 and the U-SIG-2 are interleaved by an interleaver, while the U-SIG-1-R and the U-SIG-2-R are not interleaved by the interleaver.

[0146] In one embodiment, the U-SIG-1, the U-SIG-2, and the U-SIG-2-R are mapped to BPSK constellation points, and the U-SIG-1-R is mapped to a QBPSK constellation point.

[0147] In one embodiment, the first subfield is in U-SIG-1 of the U-SIG field.

[0148] In one implementation, the first subfield is the bandwidth subfield of the U-SIG field.

[0149] For example, in format 1 and / or format 2 of the UHT ER PPDU, the bandwidth subfield for simultaneously indicating the RU allocation mode and RU allocation information may be in U-SIG-1 of the U-SIG field.

[0150] In one embodiment, the second subfield is in U-SIG-1 of the U-SIG field.

[0151] In one implementation, the second subfield is the bandwidth subfield of the U-SIG field.

[0152] In one embodiment, the third subfield is in U-SIG-1 of the U-SIG field.

[0153] In one implementation, the third subfield is the RU allocation mode subfield of the U-SIG field.

[0154] For example, in format 1 and / or format 2 of the UHT ER PPDU, the RU allocation mode subfield for indicating the RU allocation mode and the bandwidth subfield for indicating RU allocation information may be in U-SIG-1 of the U-SIG field.

[0155] In one embodiment, the fifth subfield is in U-SIG-2 of the U-SIG field.

[0156] In one implementation, the fifth subfield is the UHT-SIG MCS subfield of the U-SIG field.

[0157] For example, in format 1 and / or format 2 of the UHT ER PPDU, the UHT-SIG MCS subfield for indicating the modulation and coding scheme of the UHT-SIG field may be in U-SIG-2 of the U-SIG field.

[0158] In one embodiment, the fourth subfield is in the user field of the UHT-SIG field.

[0159] In one implementation, the fourth subfield is the MCS subfield of the UHT-SIG field.

[0160] For example, in format 1 of a UHT ER PPDU, the U-SIG field U-SIG-1 may include a first subfield, such as a bandwidth subfield, for indicating the RU allocation mode and RU allocation information. Furthermore, the U-SIG field U-SIG-2 may include a fifth subfield, such as a UHT-SIG MCS subfield, for indicating the modulation and coding scheme used by the UHT-SIG. Furthermore, the user field of the UHT-SIG field may include a fourth subfield, such as an MCS subfield, for indicating the modulation and coding scheme used by the UHT ER PPDU data field.

[0161] For another example, in format 1 of a UHT ER PPDU, the U-SIG field U-SIG-1 may include a second subfield, such as the bandwidth subfield, for indicating RU allocation information, and a third subfield, such as the RU allocation mode subfield, for indicating the RU allocation mode. Furthermore, the U-SIG field U-SIG-2 may include a fifth subfield, such as the UHT-SIG MCS subfield, for indicating the modulation and coding scheme used by the UHT-SIG. Furthermore, the user field of the UHT-SIG field may include a fourth subfield, such as the MCS subfield, for indicating the modulation and coding scheme used by the UHT ER PPDU data field.

[0162] In one embodiment, the fourth subfield is in U-SIG-2 of the U-SIG field.

[0163] In one implementation, the fourth subfield is the MCS subfield of the U-SIG field.

[0164] For example, in format 2 of the UHT ER PPDU, the U-SIG field U-SIG-1 may include a first subfield, such as a bandwidth subfield, for indicating the RU allocation mode and RU allocation information. Furthermore, the U-SIG field U-SIG-2 may include a fourth subfield, such as an MCS subfield, for indicating the modulation and coding scheme used in the UHT ER PPDU data field.

[0165] For another example, in format 2 of the UHT ER PPDU, the U-SIG-1 of the U-SIG field may include a bandwidth subfield for indicating RU allocation information and a RU allocation mode subfield for indicating the RU allocation mode. Furthermore, the U-SIG-2 of the U-SIG field may include a fourth subfield, such as an MCS subfield, for indicating the modulation and coding scheme used in the UHT ER PPDU data field.

[0166] In one embodiment, if the PPDU includes a U-SIG field and a UHT-SIG field, that is, in the case of format 1, the U-SIG field may further include at least one of the following subfields:

[0167] Physical layer version identifier (PHY Version Identifier), Uplink (UL) / Downlink (DL), Basic Service Set BSS Color (Color), Transmit Opportunity (TXOP), PPDU Type and Compression Mode (Type And Compression Mode), Punctured Channel Information (Punctured Channel Information), UHT-SIG Symbol Number (Number of UHT-SIG Symbols), Cyclic Redundancy Check (CRC), Tail (Tail) and Reserved.

[0168] In one embodiment, if the PPDU includes a U-SIG field and a UHT-SIG field, that is, in the case of format 1, the UHT-SIG field may further include at least one of the following subfields:

[0169] Spatial Reuse, Guard Interval and Long Training Field GI+LTF Size, Number of UHT-LTF Symbols, Low-Density Parity-Codes (LDPC) Extra Symbol Segment, Pre-FEC Padding Factor, Packet Extension (PE) Disambiguation, Number of Non-OFDMA Users, Station Identifier (STA-ID), Number of Spatial Streams (NSS), Beamforming, Coding, and Reservation.

[0170] In one embodiment, if the PPDU includes a U-SIG field but does not include a UHT-SIG field, that is, in the case of format 2, the U-SIG field may also include at least one of the following subfields: physical layer version identification, UL / DL, BSS color, TXOP, spatial reuse, PPDU type and compression mode, GI+LTF size, number of very high throughput long training field symbols (Number of EHT-LTF Symbols), LDPC additional symbol segment, Pre-FEC filling factor, PE disambiguation, beamforming, coding, CRC, and reserved.

[0171] In one embodiment, the PPDU further includes at least one of the following fields: a non-high throughput short training (L-STF) field, a non-high throughput long training (L-LTF) field, an ultra-high throughput short training (UHT-STF) field, an ultra-high throughput long training (UHT-LTF) field, a non-high throughput signaling (L-SIG) field, a data field, and a packet extension (PE) field.

[0172] In the embodiment of the present disclosure, the L-STF field is mainly used for signal detection, automatic gain control, time synchronization and coarse frequency offset estimation; the L-LTF field is mainly used for channel estimation and further frequency offset estimation; the L-SIG field is used to transmit rate and length information; the RL-SIG is a repetition of the L-SIG; the SIG field is used to carry information for decoding the PPDU; the UHT-STF field is used to improve the automatic gain control estimation in MIMO transmission; the UHT-LTF is used for MIMO channel estimation from the constellation mapping output to the receiving link; the Data field transmits information; and the PE field is an extension of the packet.

[0173] In one embodiment, the power boost of at least one of the L-STF field, the L-LTF field, the UHT-STF field, and the UHT-LTF field is increased by a first value of, for example, 3 dB. This 3 dB is merely an example and not a limitation, and may also be set to other values ​​according to the requirements of specific application scenarios.

[0174] In one embodiment, the data field uses DCM. The data field can use DCM to obtain more SNR (Signal to Noise Ratio) gain.

[0175] In one embodiment, the L-SIG is repeatedly transmitted in the time domain.

[0176] FIG4 is a schematic block diagram of a communication device 400 according to an embodiment of the present application. The communication device 400 may include:

[0177] The communication unit 410 is configured to send and / or receive first information, where the first information is used to extend the range ER.

[0178] In one embodiment, the first information is a physical layer protocol data unit (PPDU).

[0179] In one embodiment, the resource unit RU allocation mode of the PPDU includes a non-distributed RU allocation mode and / or a distributed RU allocation mode.

[0180] In one embodiment, in the distributed RU allocation mode, the PPDU is allowed to be transmitted on a RU of 106 subcarriers and / or an MRU of 106 subcarriers + 26 subcarriers.

[0181] In one embodiment, in the non-distributed RU allocation mode, the PPDU is allowed to be transmitted on at least one of a RU of 106 subcarriers, an MRU of 106 subcarriers+26 subcarriers, and a RU of 242 subcarriers.

[0182] In one embodiment, in different RU allocation modes, the PPDU allows different modulation and coding schemes to be used.

[0183] In one embodiment, in the distributed RU allocation mode, the modulation and coding schemes allowed for the PPDU include at least one of the following:

[0184] MCS 0: BPSK modulation, code rate 1 / 2;

[0185] MCS 1: QPSK modulation, code rate 1 / 2;

[0186] MCS 2: QPSK modulation, code rate 3 / 4;

[0187] MCS 15: BPSK-DCM modulation, code rate 1 / 2.

[0188] In one embodiment, the modulation and coding scheme in the non-distributed RU allocation mode includes at least one of the following:

[0189] The modulation and coding scheme allowed for transmission of the PPDU on a RU of 106 subcarriers and / or a MRU of 106 subcarriers + 26 subcarriers is at least one of MCS 0 and MCS 15;

[0190] The modulation and coding scheme allowed for transmission of the PPDU on an RU of 242 subcarriers is at least one of MCS 0, MCS1, MCS2, and MCS15.

[0191] In one embodiment, the PPDU includes a signal SIG field for carrying information for decoding the PPDU.

[0192] In one embodiment, the SIG field includes a Universal Signal (U-SIG) field.

[0193] In one embodiment, the U-SIG field includes:

[0194] The first subfield is used to indicate the RU allocation mode and RU allocation information.

[0195] In one embodiment, the value of the first subfield indicates at least one of the following:

[0196] Distributed RU of 106 subcarriers;

[0197] Distributed 106 subcarriers + MRU of 26 subcarriers;

[0198] Non-distributed RU with 106 subcarriers;

[0199] Non-distributed 106 subcarriers + 26 subcarrier MRU;

[0200] Non-distributed RU of 242 subcarriers;

[0201] reserve.

[0202] In one embodiment, the distributed RU of 106 subcarriers includes subcarriers after distributed mapping of the RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0203] The distributed MRU of 106 subcarriers + 26 subcarriers includes subcarriers after distributed mapping of the MRU of 106 subcarriers + 26 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0204] The non-distributed RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0205] The non-distributed MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

[0206] In one embodiment, the U-SIG field includes:

[0207] A second subfield for indicating RU allocation information;

[0208] The third subfield is used to indicate the RU allocation mode.

[0209] In one embodiment, the value of the second subfield indicates at least one of the following:

[0210] RU of 106 subcarriers;

[0211] 106 subcarriers + MRU of 26 subcarriers;

[0212] RU of 242 subcarriers;

[0213] reserve.

[0214] In one embodiment, the RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth;

[0215] The MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

[0216] In one embodiment, the value of the third subfield indicates at least one of the following:

[0217] Non-distributed RU allocation mode;

[0218] Distributed RU allocation mode.

[0219] In one embodiment, when the second subfield indicates an RU of 242 subcarriers, the third subfield indicates a non-distributed RU allocation mode.

[0220] In one embodiment, the SIG field further includes a UHT-SIG field.

[0221] In one embodiment, the UHT-SIG field includes a fourth subfield for indicating the MCS used by the data field of the PPDU.

[0222] In one embodiment, the U-SIG field in the SIG field further includes: a fifth subfield for indicating a modulation and coding scheme used by the ultra-high throughput signal UHT-SIG field.

[0223] In one implementation, the value of the fifth subfield indicates at least one of the following:

[0224] MCS 15: BPSK-DCM, code rate 1 / 2;

[0225] reserve.

[0226] In one embodiment, the U-SIG field further includes:

[0227] The fourth subfield is used to indicate the MCS used in the data field of the PPDU.

[0228] In one embodiment, when the value of the first subfield indicates a non-distributed RU of 106 subcarriers, the value of the fourth subfield indicates MCS 0 or 15; and / or

[0229] When the value of the first subfield indicates a non-distributed MRU of 106 subcarriers+26 subcarriers, the value of the fourth subfield indicates MCS 0 or 15.

[0230] In one embodiment, when the value of the second subfield indicates an RU of 106 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15; and / or

[0231] When the value of the second subfield indicates an MRU of 106 subcarriers + 26 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15.

[0232] In one implementation, the value of the fourth subfield indicates at least one of the following:

[0233] MCS 0: BPSK modulation, code rate 1 / 2;

[0234] MCS 1: QPSK modulation, code rate 1 / 2;

[0235] MCS 2: QPSK modulation, code rate 3 / 4;

[0236] MCS 15: BPSK-DCM modulation, code rate 1 / 2;

[0237] reserve.

[0238] In one embodiment, the orthogonal frequency division multiplexing (OFDM) symbol included in the U-SIG field is at least one of U-SIG-1, U-SIG-1-R, U-SIG-2, and U-SIG-2-R.

[0239] In one embodiment, the OFDM symbols included in the U-SIG field are encoded using a binary convolutional code (BCC) with a code rate of 1 / 2.

[0240] In one embodiment, the U-SIG-1 and the U-SIG-1-R carry the same bit information, and the U-SIG-2 and the U-SIG-2-R carry the same bit information.

[0241] In one embodiment, the U-SIG-1 and the U-SIG-2 are interleaved by an interleaver, while the U-SIG-1-R and the U-SIG-2-R are not interleaved by the interleaver.

[0242] In one embodiment, the U-SIG-1, the U-SIG-2, and the U-SIG-2-R are mapped to BPSK constellation points, and the U-SIG-1-R is mapped to a QBPSK constellation point.

[0243] In one embodiment, the first subfield is in U-SIG-1 of the U-SIG field.

[0244] In one implementation, the first subfield is the bandwidth subfield of the U-SIG field.

[0245] In one embodiment, the second subfield is in U-SIG-1 of the U-SIG field.

[0246] In one implementation, the second subfield is the bandwidth subfield of the U-SIG field.

[0247] In one embodiment, the third subfield is in U-SIG-1 of the U-SIG field.

[0248] In one implementation, the third subfield is the RU allocation mode subfield of the U-SIG field.

[0249] In one embodiment, the fifth subfield is in U-SIG-2 of the U-SIG field.

[0250] In one implementation, the fifth subfield is the UHT-SIG MCS subfield of the U-SIG field.

[0251] In one embodiment, the fourth subfield is in the user field of the UHT-SIG field.

[0252] In one implementation, the fourth subfield is the MCS subfield of the UHT-SIG field.

[0253] In one embodiment, the fourth subfield is in U-SIG-2 of the U-SIG field.

[0254] In one implementation, the fourth subfield is the MCS subfield of the U-SIG field.

[0255] In one embodiment, the U-SIG field further includes at least one of the following subfields: physical layer version identifier, uplink / downlink UL / DL, basic service set BSS color, transmission opportunity TXOP, PPDU type and compression mode, puncturing channel information, UHT-SIG symbol number, cyclic redundancy code CRC, tail and reserved.

[0256] In one embodiment, the UHT-SIG field further includes at least one of the following subfields: spatial reuse, guard interval and long training field GI+LTF size, number of ultra-high throughput long training field symbols, low-density parity check code LDPC extra symbol segment, pre-error correction bit error rate Pre-FEC filling factor, packet extension PE disambiguation, number of non-orthogonal frequency division multiple access users, station identifier STA-ID, number of spatial streams NSS, beamforming, coding, and reservation.

[0257] In one embodiment, the U-SIG field includes at least one of the following subfields: physical layer version identification, UL / DL, BSS color, TXOP, spatial reuse, PPDU type and compression mode, GI+LTF size, number of very high throughput long training field symbols, LDPC extra symbol segment, Pre-FEC filling factor, PE disambiguation, beamforming, coding, CRC and reserved.

[0258] In one embodiment, the PPDU further includes at least one of the following fields: a non-high throughput short training L-STF field, a non-high throughput long training L-LTF field, an ultra-high throughput short training UHT-STF field, an ultra-high throughput long training UHT-LTF field, a non-high throughput signal L-SIG field, a data field, and a packet extension field.

[0259] In one embodiment, the power of at least one of the L-STF field, the L-LTF field, the UHT-STF field, and the UHT-LTF field is increased to a first value.

[0260] In one embodiment, the data field uses dual carrier modulation (DCM).

[0261] In one embodiment, the L-SIG field is repeatedly transmitted in the time domain.

[0262] In one embodiment, the PPDU is a UHT ER PPDU.

[0263] In one embodiment, the bandwidth of the PPDU is 20 MHz.

[0264] The communication device 400 of the embodiment of the present application can implement the corresponding functions of the communication device in the aforementioned method embodiment. The processes, functions, implementation methods and beneficial effects corresponding to the various modules (sub-modules, units or components, etc.) in the communication device 400 can be found in the corresponding descriptions in the above-mentioned method embodiments, and will not be repeated here. It should be noted that the functions described in the various modules (sub-modules, units or components, etc.) in the communication device 400 of the embodiment of the application can be implemented by different modules (sub-modules, units or components, etc.) or by the same module (sub-module, unit or component, etc.).

[0265] To further balance data rate and transmission distance, embodiments of the present application can be applied to next-generation Wi-Fi communications after Wi-Fi 7 of the IEEE 802.11be specification, such as Ultra-High Throughput (UHT). Embodiments of the present application provide an Extended Range (ER) PPDU for next-generation Wi-Fi communications, such as the UHT ER PPDU.

[0266] The UHT ER PPDU is transmitted on a specified RU or MRU and allows the use of the normal RU mode (non-distributed RU mode) or distributed RU mode defined in IEEE 802.11be. The embodiment of the present application includes a UHT ER PPDU solution based on a distributed RU.

[0267] 1 Distributed RU Long-Distance Transmission Principle

[0268] 1.1 Distributed RU

[0269] Distributed RUs map contiguous subcarriers within an RU to non-contiguous subcarriers within a larger bandwidth, as shown in Figure 5. For example, RU106 occupies approximately 10 MHz of bandwidth. Consecutive subcarriers (e.g., physical subcarrier indices from -122 to -17 before mapping) are mapped to non-contiguous subcarriers within a larger 20 MHz bandwidth (e.g., physical subcarrier indices after mapping include -122, -121, ..., -112, ..., -103, ..., 94, ..., 116, and 122) according to specific mapping rules and procedures. In this way, the subcarriers within RU106 are distributed across the entire 20 MHz bandwidth.

[0270] 1.2 Distributed RU Long-Distance Transmission Principle

[0271] Generally speaking, increasing transmit power increases transmission distance and / or data rate, but also increases PSD (Power Spectral Density). Therefore, regulations limit the PSD and transmit power of APs and STAs. For example, when the center frequency (e.g., the operating frequency of an AP or STA) is 5 GHz, the regulatory limits on PSD and transmit power for APs and STAs are shown in Table 2 below.

[0272] Table 2

[0273] APSTAPSD (dBm / MHz) 1711 Transmission power limit (dBm) 3024

[0274] As shown in Table 2, when a STA uses a non-distributed 106-tone RU (approximately 10MHz) to transmit UL data, if the transmit power is 24dBm, the PSD is 24-10*lg(10)=14dBm / MHz. This exceeds the regulatory maximum PSD limit of 11dBm / MHz, so this scenario cannot operate normally. However, when using a distributed 106-tone RU to transmit UL data, the subcarriers of the 106-tone RU are distributed over a 20MHz bandwidth, and the PSD is 24-10*lg(20)=11dBm / MHz, meeting the regulatory maximum PSD limit, and this scenario can operate normally.

[0275] Similarly, when a STA uses a non-distributed 106+26-tone MRU (approximately 12MHz) to transmit UL data, if the transmit power is 24dBm, the PSD is 24-10*lg(12)=13.2dBm / MHz. This exceeds the regulatory maximum PSD limit of 11dBm / MHz. Therefore, this scenario cannot work properly. However, when using a distributed 106+26-tone MRU, distributing the 106+26-tone MRU over a 20MHz bandwidth, the PSD is 24-10*lg(20)=11dBm / MHz, meeting the regulatory maximum PSD limit and allowing normal operation.

[0276] The same applies to downlink transmissions performed by the AP. Therefore, if 106-tone RU and 106+26-tone MRU are used for transmission, the distributed RU mode can potentially apply a higher transmission power than the non-distributed RU mode, provided that the PSD limits are met.

[0277] In the embodiment of the present application, the path loss model of the outdoor UMi NLoS scenario can be used. After calculating the transmission distance of the 106-tone RU and 106+26-tone MRU in different EHT-MCS situations using the distributed RU mode, as shown in Table 3.

[0278] Table 3 Data rate and uplink transmission distance of UHT ER PPDU transmitted by distributed RU in outdoor scenario

[0279]

[0280] As shown in Table 3, if the transmission distance is approximately 50m and the distributed RU mode is used, a 106-tone RU can use MCS 1 and a data rate of 7.5Mb / s. This is approximately a 2x increase compared to using the non-distributed RU mode (as shown in Table 1, if the transmission distance is approximately 50m and the non-distributed RU mode is used, the maximum data rate of the 106-tone RU is 3.8Mb / s). As shown in Table 3, if the transmission distance is approximately 50m and the distributed RU mode is used, a 106+26-tone MRU can use MCS 1 and a data rate of 9.3Mb / s, which is approximately a 2.5x increase compared to using the non-distributed RU mode (see Table 1).

[0281] In addition, it can be seen from Table 3 and Table 1 that if the 106-tone RU and 106+26-tone MRU use MCS 2 (distributed RU mode), the data rate can be increased by 3 times and 3.7 times respectively, but the transmission distance is only reduced by about 10m.

[0282] Therefore, in an embodiment of the present application, if the distributed RU mode is used for UHT ER PPDU transmission, two types of RU / MRU can be used, namely RU106 and MRU106+26, and the MCS is at least one of MCS 0, MCS 1, MCS 2 and MCS 15.

[0283] 2UHT ER PPDU structure

[0284] An example of the structure of a UHT ER PPDU can be shown in Figure 6. The L-STF field is mainly used for signal detection, automatic gain control, time synchronization, and coarse frequency offset estimation; the L-LTF field is mainly used for channel estimation and further frequency offset estimation; the L-SIG field is used to transmit rate and length information; the RL-SIG is a repetition of the L-SIG; the SIG field is used to carry information for decoding the PPDU; the UHT-STF field is used to improve automatic gain control estimation in MIMO transmission; the UHT-LTF is used for MIMO channel estimation from the constellation mapping output to the receiving link; the Data field transmits information; and the PE field is an extension of the packet.

[0285] In the embodiment of the present application, one or more of the following settings may be made for the transmission of the UHT ER PPDU:

[0286] The power of L-STF and L-LTF fields is increased by 3dB (for example, after generating the L-STF sequence, the amplitude of each subcarrier is multiplied by ).

[0287] In the UHT-STF and UHT-LTF fields, the power is increased by 3dB.

[0288] The Data field can use DCM to obtain more SNR gain.

[0289] Regarding the signaling (or information) of decoding the PPDU in the SIG field, it can be indicated by the U-SIG and UHT-SIG fields, or by a separate U-SIG field. Considering the signaling overhead and receiver implementation complexity, the embodiment of the present application proposes two UHT ER PPDU format options:

[0290] Format 1: U-SIG+UHT-SIG mode;

[0291] Format 2: U-SIG mode.

[0292] The specific description is as follows.

[0293] Format 1: U-SIG+UHT-SIG mode

[0294] UHT ER PPDU format 1 (U-SIG+UHT-SIG mode) is shown in FIG7 , and information for decoding the PPDU is indicated by two subfields: U-SIG and UHT-SIG.

[0295] (1) U-SIG field

[0296] Figure 8 shows an example of the structure of an exemplary U-SIG field. The U-SIG field may contain four OFDM symbols, namely, U-SIG-1, U-SIG-1-R, U-SIG-2, and U-SIG-2-R, all of which are BCC-encoded with a code rate of 1 / 2. U-SIG-1 and U-SIG-1-R may carry the same bit information, and U-SIG-2 and U-SIG-2-R may carry the same bit information. To achieve better frequency diversity gain, U-SIG-1 and U-SIG-2 may be interleaved using an interleaver, while U-SIG-1-R and U-SIG-2-R may not pass through the interleaver. Furthermore, U-SIG-1, U-SIG-2, and U-SIG-2-R are mapped to BPSK constellation points, and U-SIG-1-R is mapped to a QBPSK constellation point.

[0297] The bit information and description of each subfield in the U-SIG field are shown in Example 1 and Example 2 below. The difference between the two examples is that in Example 1, the Bandwidth subfield indicates the RU allocation mode; in Example 2, a separate bit RU allocation mode subfield is used to indicate the RU allocation mode.

[0298] Example 1:

[0299] Table 4 U-SIG field in UHT ER PPDU format 1

[0300]

[0301]

[0302] Example 2:

[0303] Table 5 U-SIG field in UHT ER PPDU format 1

[0304]

[0305]

[0306] (2) UHT-SIG field

[0307] The UHT-SIG field primarily includes a common field and a user field, the structure of which is shown in Figure 9. To achieve the same gain as the duplicate structure in the U-SIG, embodiments of the present application may enforce the use of BPSK-DCM modulation and a 1 / 2 code rate for the UHT-SIG, such as MCS 15 as defined in IEEE 802.11 be Draft 1.5. The bit information and description of each subfield in the UHT-SIG field are shown in Examples 3 and 4.

[0308] Example 3: (can be combined with Example 1)

[0309] Table 6 UHT-SIG field in UHT ER PPDU format 1

[0310]

[0311]

[0312] Example 4: (can be combined with Example 2)

[0313] Table 7 UHT-SIG field in UHT ER PPDU format 1

[0314]

[0315] Format 2: U-SIG mode

[0316] UHT ER PPDU format 2 (U-SIG mode) is shown in Figure 10. Information for decoding the PPDU is indicated by the U-SIG field. The subfields in the U-SIG field are shown in Table 4. The structure of the U-SIG field, as defined in format 1, is shown in Figure 8. The U-SIG consists of four OFDM symbols: U-SIG-1, U-SIG-1-R, U-SIG-2, and U-SIG-2-R. All are coded using BCC with a code rate of 1 / 2. U-SIG-1 and U-SIG-1-R carry identical bit information, while U-SIG-2 and U-SIG-2-R carry identical bit information. To achieve better frequency diversity gain, U-SIG-1 and U-SIG-2 are interleaved, while U-SIG-1-R and U-SIG-2-R are not. Furthermore, U-SIG-1, U-SIG-2, and U-SIG-2-R are mapped to BPSK constellation points, while U-SIG-1-R is mapped to QBPSK constellation points.

[0317] The bit information and description of each subfield in the U-SIG field are shown in Example 5 and Example 6. The difference between the two examples is that in Example 5, the Bandwidth field indicates the RU allocation mode; in Example 6, a separate bit RU allocation mode is used to indicate the RU allocation mode.

[0318] Example 5:

[0319] Table 8 U-SIG field in UHT ER PPDU format 2

[0320]

[0321]

[0322] Example 6:

[0323] Table 9 U-SIG field in UHT ER PPDU format 2

[0324]

[0325]

[0326] As can be seen from the above two formats, format 1 (U-SIG + UHT-SIG mode) does not require modifications to the receiver's reception program, reducing receiver implementation complexity but increasing signaling overhead. Format 2 (U-SIG mode) requires modifications to the receiver's reception program but reduces signaling overhead.

[0327] The UHT ER PPDU based on distributed RU proposed in the embodiment of the present application further extends the transmission distance based on the HE ER SU PPDU; and while maintaining a similar transmission distance, the data rate can be increased by 2-2.5 times.

[0328] In the U-SIG+UHT-SIG format proposed in the embodiment of the present application, the UHT-SIG uses the modulation and coding scheme of "BPSK-DCM+code rate 1 / 2", which can enable the UHT-SIG field to obtain more SNR gain to achieve similar performance to the U-SIG field.

[0329] In addition, the structure of the UHT-SIG field may also be replicated in the time domain, that is, the UHT-SIG field is immediately followed by its replica UHT-SIG-R.

[0330] Figure 11 is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application. The communication device 1100 includes a processor 1110, which can call and execute a computer program from a memory to enable the communication device 1100 to implement the method in the embodiment of the present application.

[0331] In one embodiment, the communication device 1100 may further include a memory 1120. The processor 1110 may call and execute a computer program from the memory 1120 to enable the communication device 1100 to implement the method in the embodiment of the present application.

[0332] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0333] In one embodiment, the communication device 1100 may further include a transceiver 1130 , and the processor 1110 may control the transceiver 1130 to communicate with other devices. Specifically, the transceiver 1130 may send information or data to other devices, or receive information or data sent by other devices.

[0334] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of antennas may be one or more.

[0335] In one embodiment, the communication device 1100 may be the communication device of the embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the communication device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0336] 12 is a schematic structural diagram of a chip 1200 according to an embodiment of the present application. The chip 1200 includes a processor 1210, which can call and execute a computer program from a memory to implement the method according to the embodiment of the present application.

[0337] In one embodiment, the chip 1200 may further include a memory 1220. The processor 1210 may call and execute a computer program from the memory 1220 to implement the method executed by the terminal device or the network device in the embodiment of the present application.

[0338] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0339] In one embodiment, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0340] In one embodiment, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0341] In one embodiment, the chip can be applied to the communication device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the communication device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0342] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0343] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0344] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. 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).

[0345] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be 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 RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0346] FIG13 is a schematic block diagram of a communication system 1300 according to an embodiment of the present application. The communication system 1300 includes a communication device 1310 and a communication device 1320 .

[0347] The communication device 1310 is configured to send first information to the communication device 1320 or receive first information sent by the communication device 1320, where the first information is used to extend the range ER.

[0348] The communication device 1320 is configured to receive the first information sent by the communication device 1310 , or to send the first information to the communication device 1310 .

[0349] The communication devices 1310 and 1320 can be used to implement the corresponding functions implemented by the communication devices in the above method, which will not be described in detail for the sake of brevity.

[0350] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, 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 in accordance with 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 devices. 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 a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. 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 (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0351] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0352] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0353] 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 modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, comprising: The communication device sends and / or receives first information for extending the range ER.

2. The method according to claim 1, wherein The first information is a physical layer protocol data unit PPDU.

3. The method according to claim 2, wherein: The resource unit RU allocation mode of the PPDU includes a non-distributed RU allocation mode and / or a distributed RU allocation mode.

4. The method according to claim 3, wherein: In the distributed RU allocation mode, the PPDU is allowed to be transmitted on a RU of 106 subcarriers and / or an MRU of 106 subcarriers + 26 subcarriers.

5. The method according to claim 3, wherein: In the non-distributed RU allocation mode, the PPDU is allowed to be transmitted on at least one of a RU of 106 subcarriers, an MRU of 106 subcarriers+26 subcarriers, and a RU of 242 subcarriers.

6. The method according to claim 4 or 5, wherein: In different RU allocation modes, the PPDU allows different modulation and coding schemes to be used.

7. The method according to any one of claims 3 to 6, wherein In the distributed RU allocation mode, the modulation and coding scheme (MCS) allowed for the PPDU includes at least one of the following: MCS 0: BPSK modulation, code rate 1 / 2; MCS 1: QPSK modulation, code rate 1 / 2; MCS 2: QPSK modulation, code rate 3 / 4; MCS 15: BPSK-DCM modulation, code rate 1 / 2.

8. The method according to any one of claims 3 to 6, wherein The modulation and coding scheme in the non-distributed RU allocation mode includes at least one of the following: The modulation and coding scheme allowed for transmission of the PPDU on a RU of 106 subcarriers and / or a MRU of 106 subcarriers + 26 subcarriers is at least one of MCS 0 and MCS 15; The modulation and coding scheme allowed for transmission of the PPDU on an RU of 242 subcarriers is at least one of MCS 0, MCS1, MCS2, and MCS15.

9. The method according to any one of claims 2 to 8, wherein The PPDU includes a signal SIG field for carrying information for decoding the PPDU.

10. The method according to claim 9, wherein: The SIG field includes a universal signal U-SIG field.

11. The method according to claim 10, wherein: The U-SIG field includes: The first subfield is used to indicate the RU allocation mode and RU allocation information.

12. The method according to claim 11, wherein The value of the first subfield indicates at least one of the following: Distributed RU of 106 subcarriers; Distributed 106 subcarriers + MRU of 26 subcarriers; Non-distributed RU with 106 subcarriers; Non-distributed 106 subcarriers + 26 subcarrier MRU; Non-distributed RU of 242 subcarriers; reserve.

13. The method according to claim 12, wherein: The distributed RU of 106 subcarriers includes the subcarriers after distributed mapping of the RU of 106 subcarriers in the upper frequency domain within the 20 MHz bandwidth; The distributed MRU of 106 subcarriers + 26 subcarriers includes subcarriers after distributed mapping of the MRU of 106 subcarriers + 26 subcarriers in the upper frequency domain within the 20 MHz bandwidth; The non-distributed RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth; The non-distributed MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

14. The method according to claim 10, wherein: The U-SIG field includes: A second subfield for indicating RU allocation information; The third subfield is used to indicate the RU allocation mode.

15. The method according to claim 14, wherein The value of the second subfield indicates at least one of the following: RU of 106 subcarriers; 106 subcarriers + MRU of 26 subcarriers; RU of 242 subcarriers; reserve.

16. The method according to claim 15, wherein The RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth; The MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

17. The method according to any one of claims 14 to 16, wherein The value of the third subfield indicates at least one of the following: Non-distributed RU allocation mode; Distributed RU allocation mode.

18. The method according to claim 17, wherein In the case where the second subfield indicates an RU of 242 subcarriers, the third subfield indicates a non-distributed RU allocation mode.

19. The method according to any one of claims 10 to 18, wherein The SIG field also includes a UHT-SIG field.

20. The method according to claim 19, wherein The UHT-SIG field includes a fourth subfield for indicating the MCS used by the data field of the PPDU.

21. The method according to claim 19 or 20, wherein The U-SIG field in the SIG field further includes a fifth subfield for indicating a modulation and coding scheme used by an ultra-high throughput signal UHT-SIG field.

22. The method according to claim 21, wherein The value of the fifth subfield indicates at least one of the following: MCS 15: BPSK-DCM, code rate 1 / 2; reserve.

23. The method according to any one of claims 11 to 18, wherein The U-SIG field also includes: The fourth subfield is used to indicate the MCS used by the data field of the PPDU.

24. The method according to claim 23, wherein In the case where the value of the first subfield indicates a non-distributed RU of 106 subcarriers, the value of the fourth subfield indicates MCS 0 or 15; and / or When the value of the first subfield indicates a non-distributed MRU of 106 subcarriers + 26 subcarriers, the value of the fourth subfield indicates MCS 0 or 15.

25. The method according to claim 23, wherein When the value of the second subfield indicates an RU of 106 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15; and / or When the value of the second subfield indicates an MRU of 106 subcarriers + 26 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15.

26. The method according to any one of claims 23 to 25, wherein The value of the fourth subfield indicates at least one of the following: MCS 0: BPSK modulation, code rate 1 / 2; MCS 1: QPSK modulation, code rate 1 / 2; MCS 2: QPSK modulation, code rate 3 / 4; MCS 15: BPSK-DCM modulation, code rate 1 / 2; reserve.

27. The method according to any one of claims 10 to 26, wherein The orthogonal frequency division multiplexing OFDM symbol included in the U-SIG field is at least one of U-SIG-1, U-SIG-1-R, U-SIG-2 and U-SIG-2-R.

28. The method according to claim 27, wherein The OFDM symbols included in the U-SIG field are encoded using a binary convolutional code (BCC) with a code rate of 1 / 2.

29. The method according to claim 27 or 28, wherein The U-SIG-1 and the U-SIG-1-R carry the same bit information, and the U-SIG-2 and the U-SIG-2-R carry the same bit information.

30. The method according to any one of claims 27 to 29, wherein The U-SIG-1 and the U-SIG-2 are interleaved by an interleaver, while the U-SIG-1-R and the U-SIG-2-R are not interleaved by the interleaver.

31. The method according to any one of claims 27 to 30, wherein The U-SIG-1, the U-SIG-2, and the U-SIG-2-R are mapped to BPSK constellation points, and the U-SIG-1-R is mapped to a QBPSK constellation point.

32. The method of claim 11, 12, 13 or 24, wherein The first subfield is in U-SIG-1 of the U-SIG field.

33. The method according to claim 32, wherein The first subfield is the bandwidth subfield of the U-SIG field.

34. The method of any one of claims 14 to 18 or 25, wherein: The second subfield is in U-SIG-1 of the U-SIG field.

35. The method according to claim 34, wherein The second subfield is the bandwidth subfield of the U-SIG field.

36. The method of any one of claims 14 to 18 or 25, wherein: The third subfield is in U-SIG-1 of the U-SIG field.

37. The method according to claim 36, wherein The third subfield is the RU allocation mode subfield of the U-SIG field.

38. The method according to claim 21 or 22, wherein The fifth subfield is in U-SIG-2 of the U-SIG field.

39. The method according to claim 38, wherein The fifth subfield is the UHT-SIG MCS subfield of the U-SIG field.

40. The method according to any one of claims 20, 23 to 26, wherein The fourth subfield is in the user field of the UHT-SIG field.

41. The method according to claim 40, wherein The fourth subfield is the MCS subfield of the UHT-SIG field.

42. The method according to any one of claims 20, 23 to 26, wherein The fourth subfield is in U-SIG-2 of the U-SIG field.

43. The method according to claim 42, wherein The fourth subfield is the MCS subfield of the U-SIG field.

44. The method according to any one of claims 10 to 22, wherein The U-SIG field also includes at least one of the following subfields: Physical layer version identifier, uplink / downlink UL / DL, basic service set BSS color, transmission opportunity TXOP, PPDU type and compression mode, puncturing channel information, UHT-SIG symbol number, cyclic redundancy code CRC, tail and reserved.

45. The method according to any one of claims 19 to 22, wherein The UHT-SIG field further includes at least one of the following subfields: Spatial reuse, guard interval and long training field GI+LTF size, number of long training field symbols for ultra-high throughput, extra symbol segment for low-density parity check code LDPC, pre-error correction bit error rate (Pre-FEC) filling factor, packet extension PE disambiguation, number of non-orthogonal frequency division multiple access users, station identifier STA-ID, number of spatial streams NSS, beamforming, coding and reservation.

46. ​​A method according to any one of claims 10 to 18 or any one of claims 23 to 26, wherein The U-SIG field includes at least one of the following subfields: Physical layer version identification, UL / DL, BSS color, TXOP, spatial reuse, PPDU type and compression mode, GI+LTF size, number of very high throughput long training field symbols, LDPC extra symbol segment, Pre-FEC filling factor, PE disambiguation, beamforming, coding, CRC and reservation.

47. The method according to any one of claims 2 to 46, wherein The PPDU also includes at least one of the following fields: a non-high throughput short training L-STF field, a non-high throughput long training L-LTF field, an ultra-high throughput short training UHT-STF field, an ultra-high throughput long training UHT-LTF field, a non-high throughput signal L-SIG field, a data field, and a packet extension field.

48. The method of claim 47, wherein The power of at least one of the L-STF field, the L-LTF field, the UHT-STF field, and the UHT-LTF field is increased by a first value.

49. The method according to claim 47 or 48, wherein The data field uses dual carrier modulation DCM.

50. The method according to any one of claims 47 to 49, wherein The L-SIG field is repeatedly transmitted in the time domain.

51. The method according to any one of claims 2 to 50, wherein The PPDU is a UHT ER PPDU.

52. The method according to any one of claims 2 to 51, wherein The bandwidth of the PPDU is 20 MHz.

53. A communication device comprising: The communication unit is configured to send and / or receive first information, wherein the first information is used to extend the range ER.

54. The apparatus of claim 53, wherein The first information is a physical layer protocol data unit PPDU.

55. The apparatus of claim 54, wherein The resource unit RU allocation mode of the PPDU includes a non-distributed RU allocation mode and / or a distributed RU allocation mode.

56. The apparatus of claim 55, wherein In the distributed RU allocation mode, the PPDU is allowed to be transmitted on a RU of 106 subcarriers and / or an MRU of 106 subcarriers + 26 subcarriers.

57. The apparatus of claim 55, wherein In the non-distributed RU allocation mode, the PPDU is allowed to be transmitted on at least one of a RU of 106 subcarriers, an MRU of 106 subcarriers+26 subcarriers, and a RU of 242 subcarriers.

58. Apparatus according to claim 56 or 57, wherein In different RU allocation modes, the PPDU allows different modulation and coding schemes to be used.

59. Apparatus according to any one of claims 55 to 58, wherein In the distributed RU allocation mode, the modulation and coding schemes allowed for the PPDU include at least one of the following: MCS 0: BPSK modulation, code rate 1 / 2; MCS 1: QPSK modulation, code rate 1 / 2; MCS 2: QPSK modulation, code rate 3 / 4; MCS 15: BPSK-DCM modulation, code rate 1 / 2.

60. Apparatus according to any one of claims 55 to 58, wherein The modulation and coding scheme in the non-distributed RU allocation mode includes at least one of the following: The modulation and coding scheme allowed for transmission of the PPDU on a RU of 106 subcarriers and / or a MRU of 106 subcarriers + 26 subcarriers is at least one of MCS 0 and MCS 15; The modulation and coding scheme allowed for transmission of the PPDU on an RU of 242 subcarriers is at least one of MCS 0, MCS1, MCS2, and MCS15.

61. Apparatus according to any one of claims 54 to 60, wherein The PPDU includes a signal SIG field for carrying information for decoding the PPDU.

62. The apparatus of claim 61, wherein The SIG field includes a universal signal U-SIG field.

63. The apparatus of claim 62, wherein The U-SIG field includes: The first subfield is used to indicate the RU allocation mode and RU allocation information.

64. The apparatus of claim 63, wherein The value of the first subfield indicates at least one of the following: Distributed RU of 106 subcarriers; Distributed 106 subcarriers + MRU of 26 subcarriers; Non-distributed RU with 106 subcarriers; Non-distributed 106 subcarriers + 26 subcarrier MRU; Non-distributed RU of 242 subcarriers; reserve.

65. The apparatus of claim 64, wherein The distributed RU of 106 subcarriers includes the subcarriers after distributed mapping of the RU of 106 subcarriers in the upper frequency domain within the 20 MHz bandwidth; The distributed MRU of 106 subcarriers + 26 subcarriers includes subcarriers after distributed mapping of the MRU of 106 subcarriers + 26 subcarriers in the upper frequency domain within the 20 MHz bandwidth; The non-distributed RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth; The non-distributed MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

66. The apparatus of claim 62, wherein The U-SIG field includes: A second subfield for indicating RU allocation information; The third subfield is used to indicate the RU allocation mode.

67. The apparatus of claim 66, wherein The value of the second subfield indicates at least one of the following: RU of 106 subcarriers; 106 subcarriers + MRU of 26 subcarriers; RU of 242 subcarriers; reserve.

68. The apparatus of claim 67, wherein The RU of 106 subcarriers includes an RU of 106 subcarriers in the upper frequency domain within a 20 MHz bandwidth; The MRU of 106 subcarriers+26 subcarriers includes an MRU of 106 subcarriers+26 subcarriers in the upper frequency domain within a 20 MHz bandwidth.

69. Apparatus according to any one of claims 66 to 68, wherein The value of the third subfield indicates at least one of the following: Non-distributed RU allocation mode; Distributed RU allocation mode.

70. The apparatus of claim 69, wherein In the case where the second subfield indicates an RU of 242 subcarriers, the third subfield indicates a non-distributed RU allocation mode.

71. Apparatus according to any one of claims 62 to 70, wherein The SIG field also includes a UHT-SIG field.

72. The apparatus of claim 71, wherein The UHT-SIG field includes a fourth subfield for indicating the MCS used by the data field of the PPDU.

73. Apparatus according to claim 71 or 72, wherein The U-SIG field in the SIG field further includes a fifth subfield for indicating a modulation and coding scheme used by an ultra-high throughput signal UHT-SIG field.

74. The apparatus of claim 73, wherein The value of the fifth subfield indicates at least one of the following: MCS 15: BPSK-DCM, code rate 1 / 2; reserve.

75. Apparatus according to any one of claims 63 to 70, wherein The U-SIG field also includes: The fourth subfield is used to indicate the MCS used by the data field of the PPDU.

76. The apparatus of claim 75, wherein In the case where the value of the first subfield indicates a non-distributed RU of 106 subcarriers, the value of the fourth subfield indicates MCS 0 or 15; and / or When the value of the first subfield indicates a non-distributed MRU of 106 subcarriers + 26 subcarriers, the value of the fourth subfield indicates MCS 0 or 15.

77. The apparatus of claim 75, wherein When the value of the second subfield indicates an RU of 106 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15; and / or When the value of the second subfield indicates an MRU of 106 subcarriers + 26 subcarriers and the value of the third subfield indicates a non-distributed RU allocation mode, the fourth subfield indicates MCS 0 or 15.

78. Apparatus according to any one of claims 75 to 77, wherein The value of the fourth subfield indicates at least one of the following: MCS 0: BPSK modulation, code rate 1 / 2; MCS 1: QPSK modulation, code rate 1 / 2; MCS 2: QPSK modulation, code rate 3 / 4; MCS 15: BPSK-DCM modulation, code rate 1 / 2; reserve.

79. Apparatus according to any one of claims 62 to 78, wherein The orthogonal frequency division multiplexing OFDM symbol included in the U-SIG field is at least one of U-SIG-1, U-SIG-1-R, U-SIG-2 and U-SIG-2-R.

80. The apparatus of claim 79, wherein The OFDM symbols included in the U-SIG field are encoded using a binary convolutional code (BCC) with a code rate of 1 / 2.

81. The apparatus of claim 79 or 80, wherein The U-SIG-1 and the U-SIG-1-R carry the same bit information, and the U-SIG-2 and the U-SIG-2-R carry the same bit information.

82. Apparatus according to any one of claims 79 to 81, wherein The U-SIG-1 and the U-SIG-2 are interleaved by an interleaver, while the U-SIG-1-R and the U-SIG-2-R are not interleaved by the interleaver.

83. Apparatus according to any one of claims 79 to 82, wherein The U-SIG-1, the U-SIG-2, and the U-SIG-2-R are mapped to BPSK constellation points, and the U-SIG-1-R is mapped to a QBPSK constellation point.

84. The apparatus of claim 63, 64, 65 or 76, wherein The first subfield is in U-SIG-1 of the U-SIG field.

85. The apparatus of claim 84, wherein The first subfield is the bandwidth subfield of the U-SIG field.

86. Apparatus according to any one of claims 66 to 70 or 77, wherein The second subfield is in U-SIG-1 of the U-SIG field.

87. The apparatus of claim 86, wherein The second subfield is the bandwidth subfield of the U-SIG field.

88. Apparatus according to any one of claims 66 to 70 or 77, wherein The third subfield is in U-SIG-1 of the U-SIG field.

89. The apparatus of claim 88, wherein The third subfield is the RU allocation mode subfield of the U-SIG field.

90. The apparatus of claim 73 or 74, wherein The fifth subfield is in U-SIG-2 of the U-SIG field.

91. The apparatus of claim 90, wherein The fifth subfield is the UHT-SIG MCS subfield of the U-SIG field.

92. The apparatus of any one of claims 72, 75 to 78, wherein The fourth subfield is in the user field of the UHT-SIG field.

93. The apparatus of claim 92, wherein: The fourth subfield is the MCS subfield of the UHT-SIG field.

94. Apparatus according to any one of claims 72, 75 to 78, wherein The fourth subfield is in U-SIG-2 of the U-SIG field.

95. The apparatus of claim 94, wherein The fourth subfield is the MCS subfield of the U-SIG field.

96. Apparatus according to any one of claims 62 to 74, wherein The U-SIG field also includes at least one of the following subfields: Physical layer version identifier, uplink / downlink UL / DL, basic service set BSS color, transmission opportunity TXOP, PPDU type and compression mode, puncturing channel information, UHT-SIG symbol number, cyclic redundancy code CRC, tail and reserved.

97. Apparatus according to any one of claims 71 to 74, wherein The UHT-SIG field further includes at least one of the following subfields: Spatial reuse, guard interval and long training field GI+LTF size, number of long training field symbols for ultra-high throughput, extra symbol segment for low-density parity check code LDPC, pre-error correction bit error rate (Pre-FEC) filling factor, packet extension PE disambiguation, number of non-orthogonal frequency division multiple access users, station identifier STA-ID, number of spatial streams NSS, beamforming, coding and reservation.

98. Apparatus according to any one of claims 62 to 70 or any one of claims 75 to 78, wherein The U-SIG field includes at least one of the following subfields: Physical layer version identification, UL / DL, BSS color, TXOP, spatial reuse, PPDU type and compression mode, GI+LTF size, number of very high throughput long training field symbols, LDPC extra symbol segment, Pre-FEC filling factor, PE disambiguation, beamforming, coding, CRC and reservation.

99. Apparatus according to any one of claims 54 to 98, wherein The PPDU also includes at least one of the following fields: a non-high throughput short training L-STF field, a non-high throughput long training L-LTF field, an ultra-high throughput short training UHT-STF field, an ultra-high throughput long training UHT-LTF field, a non-high throughput signal L-SIG field, a data field, and a packet extension field.

100. The apparatus of claim 99, wherein The power of at least one of the L-STF field, the L-LTF field, the UHT-STF field, and the UHT-LTF field is increased by a first value.

101. The apparatus of claim 99 or 100, wherein: The data field uses dual carrier modulation DCM.

102. The apparatus of any one of claims 99 to 101, wherein The L-SIG field is repeatedly transmitted in the time domain.

103. The apparatus of any one of claims 54 to 102, wherein: The PPDU is a UHT ER PPDU.

104. Apparatus according to any one of claims 54 to 103, wherein The bandwidth of the PPDU is 20 MHz.

105. A communication device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory so as to enable the communication device to perform the method according to any one of claims 1 to 52.

106. A chip comprising: A processor, configured to call and execute a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 52.

107. A computer-readable storage medium for storing a computer program, which, when executed by a device, causes the device to perform the method according to any one of claims 1 to 52.

108. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 52.

109. A computer program causing a computer to perform the method of any one of claims 1 to 52.

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