Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device sending a first PPDU to a second device, wherein the first PPDU belongs to a first frequency domain aggregated PPDU (FD-A-PPDU), and a first STF sequence of the first PPDU is determined on the basis of one or more of the following: the bandwidth of the first PPDU, the bandwidth of the first FD-A-PPDU, the frequency domain position of the first PPDU in the first FD-A-PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device. The present application clarifies a solution for determining an STF sequence in an FD-A-PPDU, so that the STF sequence can be clarified by a sender and a receiver of the FD-A-PPDU, thereby implementing functions (for example, AGC) of the FD-A-PPDU based on the STF sequence.

Description

Wireless communication method and communication device TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and more particularly, to a wireless communication method and a communication device. BACKGROUND

[0002] Data can be transmitted between communication devices through a physical layer protocol data unit (PPDU). With the development of communication technology, a frequency domain aggregated PPDU (FD-A-PPDU) has appeared as a type of PPDU. Technical solutions related to the FD-A-PPDU need to be further improved.

[0003] SUMMARY

[0004] The present application provides a wireless communication method and a communication device. Each aspect of the present application is described below.

[0005] In a first aspect, a communication method is provided. The method comprises: a first device sending a first PPDU to a second device; wherein the first PPDU belongs to a first frequency domain aggregated PPDU, and a first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregated PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregated PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0006] In a second aspect, a communication method is provided. The method comprises: a second device receiving a first PPDU sent by a first device; wherein the first PPDU belongs to a first frequency domain aggregated PPDU, and a first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregated PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregated PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0007] In a third aspect, a communication device is provided, which is a first device, and the communication device comprises: a sending unit configured to send a first PPDU to a second device; wherein the first PPDU belongs to a first frequency domain aggregation PPDU, and a first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0008] In a fourth aspect, a communication device is provided, which is a second device, and the communication device comprises: a receiving unit configured to receive a first PPDU sent by a first device; wherein the first PPDU belongs to a first frequency domain aggregation PPDU, and a first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0009] In a fifth aspect, a communication device is provided, which comprises a processor and a memory, the memory is configured to store one or more computer programs, and the processor is configured to invoke the computer programs in the memory to cause the communication device to perform some or all of the steps in the methods of the various aspects described above.

[0010] In a sixth aspect, an embodiment of the present application provides a communication system, which comprises the communication device described above. In another possible design, the system can further comprise other devices interacting with the communication device in the solutions provided by the embodiments of the present application.

[0011] In a seventh aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program causes a communication device to perform some or all of the steps in the methods of the various aspects described above.

[0012] In an eighth aspect, an embodiment of the present application provides a computer program product, which comprises a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a communication device to perform some or all of the steps in the methods of the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0013] In a ninth aspect, an embodiment of the present application provides a chip, which comprises a memory and a processor, and the processor can invoke and run a computer program from the memory to implement some or all of the steps described in the methods of the various aspects described above.

[0014] The present application specifies the determination scheme of the STF sequence used by the FD-A-PPDU, so that the transceiving parties of the FD-A-PPDU can specify the STF sequence, and then realize the functions of the FD-A-PPDU based on the STF sequence. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applied.

[0016] FIG. 2 is an example diagram of three possible FD-A-PPDU combinations.

[0017] FIG. 3A is an example diagram of a format of an EHT MU PPDU.

[0018] FIG. 3B is an example diagram of a format of an EHT TB PPDU.

[0019] FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

[0020] FIG. 5A is an example diagram of a first FD-A-PPDU in Case 1.

[0021] FIG. 5B is an example diagram of a first FD-A-PPDU in Case 2.

[0022] FIG. 5C is an example diagram of a first FD-A-PPDU in Case 3.

[0023] FIG. 5D is an example diagram of a first FD-A-PPDU in Case 4.

[0024] FIG. 5E is an example diagram of a first FD-A-PPDU in Case 5.

[0025] FIG. 6 is an example diagram of a determination method of an STF sequence provided by Embodiment 1.

[0026] FIG. 7 is an example diagram of a determination method of an STF sequence provided by Embodiment 2.

[0027] FIG. 8 is an example diagram of a determination method of an STF sequence provided by Embodiment 3.

[0028] FIG. 9 is an example diagram of a determination method of an STF sequence provided by Embodiment 4.

[0029] FIG. 10 is an example diagram of a determination method of an STF sequence provided by Embodiment 5.

[0030] FIG. 11A is an example diagram of a determination method of an STF sequence provided by Embodiment 6.

[0031] FIG. 11B is an example diagram of another determination method of an STF sequence provided by Embodiment 6.

[0032] FIG. 12 is an example diagram of a method for determining an STF sequence according to an embodiment 7.

[0033] FIG. 13 is an example diagram of a method for determining an STF sequence according to an embodiment 8.

[0034] FIG. 14A is an example diagram of a peak-to-average power ratio (PAPR) of an STF sequence in a puncturing case according to an embodiment 4 and an embodiment 5.

[0035] FIG. 14B is an example diagram of a PAPR of an STF sequence in another puncturing case according to an embodiment 4 and an embodiment 5.

[0036] FIG. 15 is an example diagram of a structure of a communication device according to an embodiment of the present disclosure.

[0037] FIG. 16 is an example diagram of a structure of another communication device according to an embodiment of the present disclosure.

[0038] FIG. 17 is an example diagram of a structure of an apparatus for communication according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The technical solutions in the present disclosure will be described below with reference to the accompanying drawings.

[0040] Communication system

[0041] The technical solutions in the embodiments of the present disclosure can be applied to various communication systems, such as a wireless local area networks (WLAN), a wireless fidelity (WiFi), a high performance radio local area networks (HIPELAN), a wide area networks (WAN), a cellular network, or other communication systems. For example, the technical solutions in the embodiments of the present disclosure can be applied to a communication system using 802.11 standards. For example, the 802.11 standards include but are not limited to 802.11ax standards, 802.11be standards, more next generation 802.11 standards, and the like.

[0042] FIG. 1 shows a schematic diagram of a communication system to which embodiments of the present application are applicable. Referring to FIG. 1, communication devices in the communication system 100 can include an access point (AP) 111, an AP 112, a station (STA) 121, and a STA 122, where the STA 121 can access a network through the AP 111, and the STA 122 can access the network through the AP 112.

[0043] In some implementations, a STA can establish an association relationship with one or more APs, and then the STA and the APs having the association relationship can communicate with each other. Referring to FIG. 1, the AP 111 and the STA 121 can communicate with each other after establishing an association relationship, and the AP 112 and the STA 122 can communicate with each other after establishing an association relationship.

[0044] In some implementations, the communication in the communication system 100 can be communication between an AP and a non-AP STA, or communication between non-AP STAs, or communication between a STA and a peer STA, where the peer STA can refer to a device that communicates with the STA, and the peer STA can be an AP or a non-AP STA.

[0045] It should be understood that FIG. 1 exemplarily shows two AP STAs and two non-AP STAs, and the communication system 100 can include a larger number of AP STAs, or the communication system 100 can include a larger number of non-AP STAs, and the embodiments of the present application are not limited in this regard.

[0046] In addition, the above-described communication system can be applied to a multi-device cooperation scenario, such as a multi-AP (multi-access point, multi-AP) cooperation scenario, or a multi-station cooperation scenario.

[0047] In the embodiments of the present application, the names of the AP and / or the STA are not limited. In some scenarios, the AP can also be referred to as an AP STA, that is, in a certain sense, the AP is also a kind of STA. In other scenarios, the STA can also be referred to as a non-AP STA.

[0048] In some scenarios, the communication device described above can also be a "multi-link device (MLD)", that is, a device that can communicate through multiple communication links, where the multiple communication links can include communication links of different frequency bands, for example, can include millimeter wave frequency bands and / or low frequency frequency bands. Generally, if the multi-link device is an AP, the AP can also be referred to as a "multi-link AP". If the multi-link device is a STA, the STA can also be referred to as a "multi-link STA".

[0049] In the embodiments of the present application, the AP can be a device in a wireless network. The AP can be a communication server, a router, a switch, a network bridge, etc. communication entity, or the AP can include various forms of macro base station, micro base station, relay station, etc. Of course, the AP can also be a chip or circuit or processing system in these various forms of devices, so as to realize the methods and functions of the embodiments of the present application. The AP can be applied to various scenarios, such as sensor nodes in smart cities (such as smart water meters, smart electricity meters, smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, display screens, televisions, sound systems, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (such as AR, VR, etc. Wearable devices), smart office smart devices (such as printers, projectors, etc.), Internet of Vehicles in Internet of Vehicles, some infrastructure in daily life (such as vending machines, self-service navigation stations in supermarkets, self-service checkout devices, self-service ordering machines) and the like.

[0050] In some implementations, the role of the STA in the communication system is not absolute, and in some scenarios, the STA can act as an AP. For example, in the scenario of a mobile phone connecting a router, the mobile phone can be a non-AP STA, and in the case of the mobile phone as a hotspot for other mobile phones, the mobile phone acts as an AP.

[0051] In the embodiments of the present application, the STA in the embodiments of the present application can be a device with wireless transceiver function, such as can support 802.11 series protocol, can communicate with AP or other STA, for example, STA is any user communication device that allows users to communicate with AP and then communicate with WLAN. STA is, for example, user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0052] The STA in the embodiments of the present application can also be a device providing voice / data connectivity to a user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. For example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0053] By way of example and not limitation, in the embodiments of the present application, the STA can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. For example, a smart watch or smart glasses, etc., and only focus on a certain type of application function, need to be used with other devices such as a smart phone, such as various types of smart wristbands, smart jewelry, etc.

[0054] In addition, in the embodiments of the present application, the STA can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, the IoT technology can achieve massive connection, deep coverage and terminal power saving through, for example, narrow band (NB) technology.

[0055] In addition, in the embodiments of the present application, the STA can be a device in a vehicle-to-everything (V2X) system. The communication mode in the V2X system is collectively referred to as V2X (X represents anything). For example, the V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication or vehicle-to-network (V2N) communication, etc.

[0056] In addition, in the embodiments of the present application, the STA can also include a smart printer, a train detector, a gas station sensor, and the like. The main functions include collecting data (part of the terminal device), receiving control information and downlink data of the AP, and transmitting electromagnetic waves to transmit data to the AP.

[0057] In addition, the AP in the embodiments of the present application can be a device for communicating with the STA. The AP can be a network device in a wireless local area network, and the AP can be used for communicating with the STA through the wireless local area network.

[0058] From the perspective of the communication system supported by the AP, in some implementations, the AP can be a device supporting the 802.11be system. The AP can also be a device supporting multiple current and future WLAN systems of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0059] From the perspective of the communication system supported by the STA, in some implementations, the non-AP STA can support the 802.11be system. The non-AP STA can also support multiple current and future WLAN systems of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0060] In the embodiments of the present application, the frequency bands supported by the WLAN technology are not limited. In some implementations, the frequency bands supported by the WLAN technology can include, but are not limited to, low frequency bands (such as 2.4 GHz, 5 GHz, 6 GHz), high frequency bands (such as 45 GHz, 60 GHz).

[0061] It should be understood that the specific forms of the STA and the AP in the embodiments of the present application are not specially limited, and are only exemplary described herein.

[0062] Frequency domain aggregated PPDU (FD-A-PPDU)

[0063] With the development of communication technology, the FD-A-PPDU type of PPDU has appeared. The FD-A-PPDU can include a plurality of PPDUs distributed in the frequency domain. For example, the plurality of PPDUs can include a first PPDU and a second PPDU.

[0064] Optionally, the first PPDU and the second PPDU can correspond to different amendments. The amendments in the present application can include, but are not limited to, ultra-high reliability (UHR), high efficiency (HE), extremely high throughput (EHT), etc. The amendment corresponding to the PPDU can refer to the latest amendment, the latest amendment or the latest amendment that the PPDU can support. For example, the first PPDU can correspond to UHR (i.e., UHR PPDU), and the second PPDU can correspond to HE (i.e., HE PPDU). For another example, the first PPDU can correspond to EHT (i.e., EHT PPDU), and the second PPDU can correspond to UHR.

[0065] Optionally, the first PPDU and the second PPDU can correspond to the same amendment, and the devices facing the first PPDU and the devices facing the second PPDU can support different amendments. The devices facing the PPDU can include: a device receiving the PPDU, and / or a device transmitting the PPDU. For example, the first PPDU and the second PPDU can both correspond to HE (i.e., both are HE PPDUs), and the receiving device and the transmitting device of the first PPDU are both non-EHT HE STAs, and the receiving / transmitting device of the second PPDU can be a UHR STA. The second PPDU can also be referred to as an HE PPDU (HE PPDU (by UHR STA)) facing the UHR STA.

[0066] Figure 2 illustrates three possible FD-A-PPDU combinations. As shown in Figure 2, in combination (a), the FD-A-PPDU includes an HE PPDU and an HE PPDU (by UHR STA), where the two PPDUs occupy 80MHz bandwidth respectively. In combination (b), the FD-A-PPDU includes an HE PPDU and a UHR PPDU, where the two PPDUs occupy 160MHz bandwidth respectively. In combination (c), the FD-A-PPDU includes an HE PPDU, an HE PPDU (by UHR STA), and a UHR PPDU, where the HE PPDU and the HE PPDU (by UHR STA) occupy 80MHz bandwidth respectively, and the UHR PPDU occupies 160MHz bandwidth.

[0067] It should be noted that the FD-A-PPDU combinations shown in Figure 2 do not limit the frequency domain positions of the PPDUs in the FD-A-PPDU. For example, in combination (a), the HE PPDU (by UHR STA) can be located in the higher 80MHz, or in the lower 80MHz.

[0068] For WiFi technology, the goals that can be achieved by the FD-A-PPDU include: 1) a large number of legacy WiFi devices will coexist with new WiFi devices for a long time; 2) a 320MHz capable AP can serve several 80MHz capable clients, each of which is from the same or different WiFi amendments; 3) improves the scheduling flexibility and efficiency as WiFi evolves.

[0069] PPDU format

[0070] To facilitate understanding of the present application, the PPDU format and some fields in the PPDU are introduced below.

[0071] A PPDU can be divided into a trigger based (TB) PPDU and a non-trigger based (non-TB) PPDU. A non-TB PPDU does not respond to a trigger frame. A TB PPDU can be used to respond to a trigger frame from an AP. A non-TB PPDU can include, for example, a multi user (MU) PPDU.

[0072] A STF field can be included in a PPDU. The STF field can be, for example, a non-legacy STF. The non-legacy STF can include, for example, a UHR-STF, a HE-STF, an EHT-STF, etc. The main purpose of the non-legacy STF field (e.g. EHT-STF field) is to improve automatic gain control estimation in a MIMO transmission.

[0073] For ease of understanding, the EHT-STF field in an EHT MU PPDU and an EHT TB PPDU is described below with the EHT as an example. The format of the non-legacy STF field in a PPDU corresponding to other amendments is similar to that of the EHT PPDU, which is not described here.

[0074] FIG. 3A is an example diagram of a format of an EHT MU PPDU. The EHT MU PPDU can include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), a universal SIGNAL field (U-SIG), an EHT-SIG field, an EHT-STF field, an EHT-LTF field, a data field, and a packet extension field (PE).

[0075] FIG. 3B is an example diagram of a format of an EHT TB PPDU. The EHT TB PPDU can contain an L-STF field, an L-LTF field, an L-SIG field, an RL-SIG field, a U-SIG field, an EHT-STF field, an EHT-LTF field, a data field, and a PE field. As can be seen, there is no EHT-SIG field in the EHT TB PPDU.

[0076] As can be seen from FIGS. 3A and 3B, for EHT MU PPDU, the EHT-STF field is positioned immediately after the EHT-SIG field. For EHT TB PPDU, the EHT-STF field is positioned immediately after the U-SIG field.

[0077] It is noted that the duration of the EHT-STF field in EHT TB PPDU can be twice that of the EHT-STF in EHT MU PPDU. For example, the duration of the EHT-STF field in EHT MU PPDU can be T EHT-STF-NT (periodicity of 0.8μs with 5 periods)and the duration of the EHT-STF field for EHT TB PPDU isT EHT-STF-T (periodicity of 1.6μs with 5 periods).) EHT-STF-NT (periodicity of 0.8μs with 5 periods)and the duration of the EHT-STF field for EHT TB PPDU isT EHT-STF-T (periodicity of 1.6μs with 5 periods).)

[0078] STF sequence

[0079] The frequency sequence (or referred to as sequence) of the STF field can be determined based on an M sequence. The M sequence can be defined as: M = {-1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1}.

[0080] For different transmission bandwidths and PPDU types (MU PPDU or TB PPDU), the transceiver pair can determine the STF sequence based on the M-sequence. The following is an example. In the following example, EHTS can represent the EHT-STF sequence, and HES can represent the HE-STF sequence.

[0081] 1) Non-trigger-based STF sequence

[0082] For 80MHz transmission, the frequency sequence of EHT of EHT MU PPDU can satisfy the following formula: EHTS ―496:16:496 = HES ―496:16:496 . Wherein,

[0083] For 160MHz transmission, the frequency sequence of EHT of EHT MU PPDU can satisfy the following formula: EHTS ―1008:16:1008 = HES ―1008:16:1008 . Wherein,

[0084] For 320MHz transmission, the frequency sequence of EHT of EHT MU PPDU can satisfy the following formula:

[0085] 2) Trigger-based STF sequence

[0086] For 80MHz transmission, the frequency sequence of EHT of EHT TB PPDU can satisfy the following formula: EHTS ―504:8:504 = HES ―504:8:504 . Wherein,

[0087] Wherein, the value of the HE-STF sequence at the edge tone indices ±504 is HES ±504 = 0.

[0088] For 160MHz transmission, the frequency sequence of EHT of EHT TB PPDU can satisfy the following formula: EHTS ―1016:8:1016 = HES ―1016:8:1016 . Wherein,

[0089] where the value of the HE-STF sequence at edge tone indices ±8 and ±1016 is HES ±8 = 0, HES ±1016 = 0.)

[0090] For a 320MHz transmission, the EHT frequency sequence of the EHT TB PPDU can satisfy the following formula:

[0091] where the values of the EHT-STF sequence at indices ±8, ±1016, ±1032, and ±2040 are HES ±8 = HES ±1016 = HES ±2040 = 0)

[0092] The support of receiving / transmitting STF sequences by devices supporting different amendments is introduced as follows.

[0093] An HE AP shall not allocate an RU in a 160MHz or 80+80MHz HE MU or HE TB PPDU to an 80MHz operating non-AP HE STA if the non-AP STA has set the 80MHz In 160 / 80+80MHz HE PPDU subfield in the HE PHY Capabilities Information field in the HE Capabilities element to 0.

[0094] It can be seen that the 80MHz HE non-AP STA (or non-EHT non-AP STA) does not necessarily support 160MHz PPDU transmission / reception, and thus does not necessarily support transmission / reception of a 160MHz STF sequence. Since the maximum bandwidth supported by HE is 160MHz, the 80MHz HE non-AP STA does not support 320MHz PPDU transmission / reception, and thus does not support transmission / reception of a 320MHz STF sequence.

[0095] An 80MHz operating non-AP EHT STA shall be able to participate in 160MHz, and 320MHz EHT DL and UL OFDMA transmissions. An EHT AP with a CHANNEL_WIDTH parameter greater than 80MHz shall be able to allocate an RU or MRU within the 80MHz operating bandwidth of the non-AP EHT STA in a 160MHz or 320MHz EHT MU or EHT TB PPDU.

[0096] It can be seen that the 80MHz EHT non-AP STA supports 160 / 320MHz PPDU transmission / reception, and thus supports transmission / reception of a 160 / 320MHz STF sequence.

[0097] Since the maximum bandwidth of HE is 160MHz, the HE non-AP STA does not support transmission / reception of a 320MHz PPDU, and thus does not support transmission / reception of a 320MHz STF sequence.

[0098] (A 160MHz operating non-AP EHT STA shall be able to participate in 320MHz EHT DL and UL OFDMA transmissions.An EHT AP with CHANNEL_WIDTH parameter greater than 160MHz shall be able to allocate an RU or MRU on the primary 160MHz channel in a 320MHz EHT MU or EHT TB PPDU to a 160MHz operating non-AP EHT STA.)

[0099] Therefore, the 160MHz EHT non-AP STA supports 320MHz PPDU transmission / reception, and further supports transmitting / receiving a 320MHz STF sequence.

[0100] For the FD-A-PPDU, how to determine the STF sequence has not been solved by the related art.

[0101] FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application, to solve the above problems. The method shown in FIG. 4 can be performed by a first device and a second device. The first device and the second device can both be the communication device described above. For example, the first device can include an AP or a non-AP STA. For another example, the second device can include an AP or a non-AP STA.

[0102] The method shown in FIG. 4 can include step S410.

[0103] In step S410, the first device transmits a first PPDU to the second device.

[0104] The first PPDU belongs to a first frequency domain aggregated PPDU (hereinafter referred to as a first FD-A-PPDU). Exemplarily, the first FD-A-PPDU can include a plurality of PPDUs, and the first PPDU can be one of the plurality of PPDUs.

[0105] In a case where the first device comprises an AP and the second device comprises a non-AP STA, the AP can transmit the first FD-A-PPDU. The first PPDU in the first FD-A-PPDU can be transmitted to the non-AP STA. The other PPDUs in the first FD-A-PPDU can be transmitted to other non-AP STAs.

[0106] In a case where the first device comprises a non-AP STA and the second device comprises an AP, the non-AP STA can transmit the first PPDU in the first FD-A-PPDU to the AP. Other non-AP STAs can transmit the other PPDUs in the first FD-A-PPDU.

[0107] For the purpose of understanding the present application, the present application is described by taking five possible cases of PPDU combination contained in the first FD-A-PPDU as an example. It can be understood that the five cases are only examples and are not limiting. That is, the present application can also be applied to other cases of the first FD-A-PPDU.

[0108] Case one, the bandwidth of the first FD-A-PPDU is 160MHz

[0109] FIG. 5A is an example diagram of the first FD-A-PPDU in case one. In FIG. 5A, the first FD-A-PPDU comprises a HE PPDU and a third PPDU. The third PPDU can comprise a HE PPDU (by a UHR STA) or a UHR PPDU. Both the HE PPDU and the third PPDU can be 80MHz.

[0110] The first PPDU can be any one of the HE PPDU or the third PPDU.

[0111] It should be noted that the present application does not limit the position of the HE PPDU or the third PPDU in the first FD-A-PPDU in case one. For example, the HE PPDU can be located in the lower 80MHz and the third PPDU can be located in the upper 80MHz. For another example, the HE PPDU can be located in the upper 80MHz and the third PPDU can be located in the lower 80MHz.

[0112] Case two, the bandwidth of the first FD-A-PPDU is 320MHz

[0113] FIG. 5B is an example diagram of the first FD-A-PPDU in case two. In FIG. 5B, the first FD-A-PPDU comprises a HE PPDU and a UHR PPDU. Both the HE PPDU and the UHR PPDU are 160MHz.

[0114] The first PPDU can be any of a HE PPDU or a UHR PPDU.

[0115] Note that the present application does not limit the location of the HE PPDU or the UHR PPDU in the first FD-A-PPDU in Case Two. For example, the HE PPDU can be in the lower 160 MHz and the UHR PPDU can be in the upper 160 MHz. For another example, the HE PPDU can be in the upper 160 MHz and the UHR PPDU can be in the lower 160 MHz.

[0116] Case Three, the bandwidth of the first FD-A-PPDU is 320 MHz

[0117] FIG. 5C is an example diagram of the first FD-A-PPDU in Case Three. In FIG. 5B, the first FD-A-PPDU includes a HE PPDU, a fourth PPDU, and a fifth PPDU. The fourth PPDU can be a HE PPDU (by a UHR STA), an EHT PPDU, or a UHR PPDU. The fifth PPDU can be an EHT PPDU or a UHR PPDU.

[0118] For example, the fourth PPDU is a HE PPDU (by a UHR STA) and the fifth PPDU is a UHR PPDU. For another example, the fourth PPDU is an EHT PPDU and the fifth PPDU is a UHR PPDU. For another example, the fourth PPDU is a UHR PPDU and the fifth PPDU is an EHT PPDU.

[0119] In FIG. 5C, the bandwidth of the HE PPDU is 80 MHz, the bandwidth of the fourth PPDU is 80 MHz, and the bandwidth of the fifth PPDU is 160 MHz.

[0120] The first PPDU can be any of the HE PPDU, the fourth PPDU, or the fifth PPDU.

[0121] Note that the present application does not limit the location of the HE PPDU, the fourth PPDU, or the fifth PPDU in the first FD-A-PPDU in Case Two. For example, the HE PPDU can be in the first 80 MHz, the second 80 MHz, the third 80 MHz, or the fourth 80 MHz from low to high in frequency. The fourth PPDU can be in the first 80 MHz, the second 80 MHz, the third 80 MHz, or the fourth 80 MHz from low to high in frequency. The fifth PPDU can be in the upper 160 MHz or the lower 160 MHz.

[0122] Case Four, the bandwidth of the first FD-A-PPDU is 160 MHz

[0123] FIG. 5D is an example diagram of the first FD-A-PPDU in Case Four. In FIG. 5D, the first FD-A-PPDU includes an EHT PPDU and a UHR PPDU. Both the EHT PPDU and the UHR PPDU are 80 MHz.

[0124] The first PPDU can be either of the EHT PPDU or the UHR PPDU.

[0125] It is noted that the present application does not limit the location of the EHT PPDU or the UHR PPDU in the first FD-A-PPDU in Case Four. For example, the EHT PPDU can be located in the lower 80 MHz, and the UHR PPDU can be located in the upper 80 MHz. For another example, the EHT PPDU can be located in the upper 80 MHz, and the UHR PPDU can be located in the lower 80 MHz.

[0126] Case Five, the bandwidth of the first FD-A-PPDU is 320 MHz

[0127] FIG. 5E is an example diagram of the first FD-A-PPDU in Case Five. In FIG. 5E, the first FD-A-PPDU includes an EHT PPDU and a UHR PPDU. Both the EHT PPDU and the UHR PPDU are 160 MHz.

[0128] The first PPDU can be either of the EHT PPDU or the UHR PPDU.

[0129] It is noted that the present application does not limit the location of the EHT PPDU or the UHR PPDU in the first FD-A-PPDU in Case Five. For example, the EHT PPDU can be located in the lower 160 MHz, and the UHR PPDU can be located in the upper 160 MHz. For another example, the EHT PPDU can be located in the upper 160 MHz, and the UHR PPDU can be located in the lower 160 MHz.

[0130] The present application proposes a method for determining a first STF sequence of a first PPDU in a first FD-A-PPDU. The first STF sequence can correspond to a first STF. The first STF can be a non-legacy STF. For example, the first STF can include an HE-STF, an EHT-STF, or a UHR-STF. That is, the first STF sequence can include an HE-STF sequence, an EHT-STF sequence, or a UHR-STF sequence.

[0131] In addition, the first STF sequence is determined based on one or more of the amendment corresponding to the PPDU, the amendment supported by the device receiving the PPDU, and the amendment supported by the device transmitting the PPDU. The STF sequence of the FD-A-PPDU can be determined for the corresponding amendment, so as to meet the support of the STF sequence by different amendments in different bandwidths as described above.

[0132] In some embodiments, the first STF sequence can be determined based on one or more of the bandwidth of the first PPDU, the bandwidth of the first FD-A-PPDU, the frequency domain position of the first PPDU in the first FD-A-PPDU, the amendment corresponding to the first PPDU, the amendment supported by the first device, and the amendment supported by the second device. The following will be described respectively.

[0133] Optionally, the bandwidth of the first PPDU can be 80MHz, 160MHz, etc.

[0134] Optionally, the bandwidth of the first FD-A-PPDU can be 160MHz, 320MHz, etc.

[0135] Optionally, the frequency domain position of the first PPDU in the first FD-A-PPDU can be used to indicate whether the first PPDU is in a higher frequency domain position or a lower frequency domain position in the first FD-A-PPDU. Optionally, the bandwidth of the first FD-A-PPDU can be divided into a plurality of subblocks, and the frequency domain position occupied by the first PPDU can be used to indicate the subblock in which the first PPDU is located.

[0136] For example, in the case that the bandwidth of the first FD-A-PPDU is 160MHz and the bandwidth of the first PPDU is 80MHz, the frequency domain position of the first PPDU in the first FD-A-PPDU can include: a higher 80MHz in the first FD-A-PPDU, and a lower 80MHz in the first FD-A-PPDU. Alternatively, the frequency domain position of the first PPDU in the first FD-A-PPDU can include: a first 80MHz subblock in a low-to-high order of frequency, and a second 80MHz subblock in a low-to-high order of frequency.

[0137] For another example, in the case that the bandwidth of the first FD-A-PPDU is 320MHz and the bandwidth of the first PPDU is 160MHz, the frequency domain position of the first PPDU in the first FD-A-PPDU can include: a higher 160MHz in the first FD-A-PPDU, and a lower 160MHz in the first FD-A-PPDU. Alternatively, the frequency domain position of the first PPDU in the first FD-A-PPDU can include: a first 160MHz subblock in a low-to-high order of frequency, and a second 160MHz subblock in a low-to-high order of frequency.

[0138] For example, in the case that the bandwidth of the first FD-A-PPDU is 320MHz and the bandwidth of the first PPDU is 80MHz, the frequency domain location of the first PPDU in the first FD-A-PPDU can include: the 1st 80MHz sub-block in the frequency domain from low to high, the 2nd 80MHz sub-block in the frequency domain from low to high, the 3rd 80MHz sub-block in the frequency domain from low to high, and the 4th 80MHz sub-block in the frequency domain from low to high.

[0139] The amendment corresponding to the first PPDU can be used to indicate the amendment that the device capable of parsing the first PPDU needs to support. For example, the amendment corresponding to the first PPDU can include: UHR, HE, EHT, etc. In the case that the amendment corresponding to the first PPDU is UHR, the device receiving and transmitting the first PPDU needs to at least support UHR (for example, can support UHR, HE, and EHT). In the case that the amendment corresponding to the first PPDU is EHT, the device receiving and transmitting the first PPDU needs to at least support EHT (for example, can support UHR, HE, and EHT).

[0140] The first device is the sender of the first PPDU, and the amendment supported by the first device is the amendment supported by the sender of the first PPDU. That is, the first STF sequence of the first PPDU can be determined based on the amendment supported by the sender of the first PPDU. The amendment supported by the first device can be represented by the highest amendment supported by the first device, that is, the first STF sequence can be determined based on the highest amendment supported by the first device. For example, if the first device is a UHR STA, the amendment supported by the first device can include one or more of the following: UHR, HE, EHT. For example, if the first device is a non-UHR EHT STA, the amendment supported by the first device can include one or more of the following: EHT, HE. For example, if the first device is a non-EHT HE STA, the amendment supported by the first device can include HE.

[0141] The second device is a receiver of the first PPDU, and the amendment supported by the second device is the amendment supported by the receiver of the first device. That is, the first STF sequence of the first PPDU can be determined based on the amendment supported by the receiver of the first PPDU. The amendment supported by the second device can be represented by the highest amendment supported by the second device, that is, the first STF sequence can be determined based on the highest amendment supported by the second device. For example, if the second device is a UHR STA, the amendment supported by the second device can include one or more of the following: UHR, HE, EHT. For another example, if the second device is a non-UHR EHT STA, the amendment supported by the second device can include one or more of the following: EHT, HE. For another example, if the second device is a non-EHT HE STA, the amendment supported by the second device can include HE.

[0142] The present application specifies the determination scheme of the STF sequence in the FD-A-PPDU, so that the transmitting and receiving parties in the FD-A-PPDU transmission can specify the STF sequence, thereby realizing the functions (such as AGC) of the FD-A-PPDU based on the STF sequence.

[0143] In some embodiments, the bandwidth of the first PPDU is a first bandwidth, and the first STF sequence can be an STF sequence corresponding to the first bandwidth. For example, when the bandwidth of the first PPDU is 80MHz, the first STF sequence can be an STF sequence corresponding to 80MHz.

[0144] For example, if the first PPDU is a non-TB PPDU and the bandwidth of the first PPDU is 80MHz, the first STF sequence can be an 80MHz HE non-TB STF sequence, an 80MHz EHT non-TB STF sequence, or an 80MHz UHR non-TB STF sequence, etc.

[0145] For another example, if the first PPDU is a non-TB PPDU and the bandwidth of the first PPDU is 160MHz, the first STF sequence can be a 160MHz HE non-TB STF sequence, a 160MHz EHT non-TB STF sequence, or a 160MHz UHR non-TB STF sequence, etc.

[0146] For another example, if the first PPDU is a TB PPDU and the bandwidth of the first PPDU is 80MHz, the first STF sequence can be an 80MHz HE TB STF sequence, an 80MHz EHT TB STF sequence, or an 80MHz UHR TB STF sequence, etc.

[0147] For example, if the first PPDU is a TB PPDU, and the bandwidth of the first PPDU is 160 MHz, the first STF sequence can be a 160 MHz HE TB STF sequence, a 160 MHz EHT TB STF sequence, or a 160 MHz UHR TB STF sequence, etc.

[0148] It can be understood that the first STF sequence is a sequence corresponding to the first bandwidth, which is simpler to implement. That is, based on a similar manner to the related art, in the present application, the PPDU in the FD-A-PPDU can determine the STF sequence based on the bandwidth.

[0149] In some embodiments, in a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence can be a STF sequence corresponding to the first bandwidth. In other words, in a case where the amendment corresponding to the first PPDU is a specific amendment, the first STF sequence can be a STF sequence corresponding to the first bandwidth. For example, the first amendment can include HE or EHT. Illustratively, in a case where the amendment corresponding to the first PPDU is HE, the first sequence can be a STF sequence corresponding to the first bandwidth. Illustratively, in a case where the amendment corresponding to the first PPDU is EHT, the first sequence can be a STF sequence corresponding to the first bandwidth.

[0150] As described above, non-EHT HE STAs do not necessarily support OFDMA transmission of larger bandwidths (e.g., 160 MHz or 320 MHz). Therefore, for a case where the receiving / transmitting device of the first PPDU is a non-EHT HE STA or the first PPDU is an HE PPDU, the present application determines the first STF sequence according to the bandwidth of the first PPDU itself (i.e., the first bandwidth), so that the transmission of the first PPDU conforms to the provisions of the related art, thereby making the transmission of the first FD-A-PPDU conform to the provisions of the related art, and further achieving accurate transmission of the first FD-A-PPDU. For example, in a case where the first PPDU is an HE PPDU, if the bandwidth of the first FD-A-PPDU is 160 MHz or 320 MHz, and the first STF sequence is determined according to the bandwidth of the first FD-A-PPDU, it will cause the target receiving non-EHT HE STA of the first PPDU to be unable to receive the first PPDU.

[0151] In some embodiments, in a case where the first PPDU satisfies a first condition, the first STF sequence can be a STF sequence corresponding to the first bandwidth. In other words, in a case where the first PPDU meets a specific condition, the first STF sequence can be a sequence corresponding to the first bandwidth.

[0152] The first condition can include one or more of the following: the amendment corresponding to the first PPDU is the first amendment, and the amendment type supported by the first device includes the second amendment; the amendment corresponding to the first PPDU is the first amendment, and the amendment supported by the second device includes the second amendment; and the amendment corresponding to the first PPDU is the second amendment.

[0153] It should be noted that in the case where the amendment corresponding to the first PPDU is the second amendment, the amendment supported by the second device can not include the second amendment. In this case, the second PPDU can be difficult to receive or parse the first PPDU.

[0154] In this application, the release date of the first amendment can be earlier than the release date of the second amendment. For example, in the first condition, the first amendment can be HE, and the second amendment can be UHR. In this case, the case where the amendment corresponding to the first PPDU is the first amendment and the amendment type supported by the first device includes the second amendment can be the case where the first PPDU is the HE PPDU (by UHR STA) described above. The case where the amendment corresponding to the first PPDU is the first amendment and the amendment type supported by the second device includes the second amendment can be the case where the first PPDU is the HE PPDU (by UHR STA) described above. That is, in the case where the first PPDU is the HE PPDU (by UHR STA), the first STF sequence can be the sequence corresponding to the first bandwidth.

[0155] In the case where the second amendment is UHR, the first condition can include that the first PPDU is a UHR PPDU. That is, in the case where the first PPDU is a UHR PPDU, the first STF sequence can be the sequence corresponding to the first bandwidth.

[0156] Optionally, the first FD-A-PPDU can include the first PPDU and the second PPDU, and both the first PPDU and the second PPDU can use the technical solutions described above (i.e., the STF sequence is the STF sequence corresponding to the bandwidth of the PPDU). The following will be illustrated respectively for the above-mentioned case one to case three.

[0157] Exemplarily, for case one, for the HE PPDU, if the HE PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used. If the HE PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the third PPDU, if the third PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the third PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used.

[0158] Exemplarily, for case two, for the HE PPDU, if the HE PPDU is a non-TB PPDU, a 160MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, a 160MHz HE TB STF sequence is used. For the UHR PPDU, if the UHR PPDU is a non-TB PPDU, a 160MHz HE non-TB STF sequence is used; if the UHR PPDU is a TB PPDU, a 160MHz HE TB STF sequence is used.

[0159] Exemplarily, for case three, for the HE PPDU, if the HE PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the fourth PPDU, if the fourth PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the fourth PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the fifth PPDU, if the fifth PPDU is a non-TB PPDU, a 160MHz HE non-TB STF sequence is used; if the UHR PPDU is a TB PPDU, a 160MHz HE TB STF sequence is used.

[0160] In some embodiments, the first STF sequence can be determined based on a second bandwidth. For example, the first STF sequence can be a partial sequence in the STF sequence of the second bandwidth. Wherein the second bandwidth can be greater than the bandwidth of the first PPDU.

[0161] Optionally, the second bandwidth can be the bandwidth of the first FD-A-PPDU. Or, the second bandwidth can be the maximum bandwidth that the receiving device or the transmitting device of the first PPDU can support. Or, the second bandwidth can be a fixed value (e.g. 160MHz).

[0162] Optionally, the second bandwidth can satisfy one or more of the following: a standard regulation, a pre-configuration, a network side configuration.

[0163] Exemplarily, in a case where the second bandwidth is 160MHz and the first bandwidth is 80MHz, the first STF sequence can be a partial sequence in the STF sequence corresponding to the 160MHz bandwidth. For example, in a case where the first PPDU is a non-TB PPDU, the first PPDU can be a partial sequence in the 160MHz HE non-TB STF sequence. For another example, in a case where the first PPDU is a TB PPDU, the first PPDU can be a partial sequence in the 160MHz HE TB STF sequence.

[0164] Exemplarily, in a case where the second bandwidth is 320MHz and the first bandwidth is 80MHz or 160MHz, the first STF sequence can be a partial sequence in the STF sequence corresponding to the 320MHz bandwidth. For example, in a case where the first PPDU is a non-TB PPDU, the first PPDU can be a partial sequence in the 320MHz HE non-TB STF sequence. For another example, in a case where the first PPDU is a TB PPDU, the first PPDU can be a partial sequence in the 320MHz HE TB STF sequence.

[0165] In some embodiments, in a case where the second condition is satisfied, the first STF sequence can be a partial sequence in the STF sequence of the second bandwidth. That is, in a case where a certain condition is satisfied, the first STF sequence can be a partial sequence in the STF sequence of the second bandwidth.

[0166] Optionally, the second condition can include: the amendment corresponding to the first PPDU is a first amendment, and the amendment types supported by the first device include a second amendment; the amendment corresponding to the first PPDU is the first amendment, and the amendment types supported by the second device include the second amendment; the amendment corresponding to the first PPDU is the second amendment. Exemplarily, the first amendment can be HE, and the second amendment can be EHT or UHR.

[0167] As described above, the EHT STA or the UHR STA can support a larger bandwidth (e.g., 160MHz or 320MHz). Therefore, even if the second bandwidth is larger, the EHT STA or the UHR STA can support the STF sequence of the second bandwidth, so that a partial sequence therein can be determined. Since the STF sequence of the larger bandwidth is longer, selecting a partial sequence therefrom can make the probability of the STF sequence used by the PPDUs in the first FD-A-PPDU different greater. Since the difference in the STF sequence can help to reduce the PAPR, the technical solution can help to reduce the PAPR.

[0168] In some embodiments, the first STF sequence can be a partial sequence in the STF sequence of the second bandwidth, in a case that the amendment corresponding to the first PPDU is a first amendment. That is, in a case that the amendment corresponding to the first PPDU is a specific amendment, the first STF sequence can be a partial sequence in the STF sequence of the second bandwidth. Exemplarily, the first amendment can include EHT.

[0169] Optionally, in a case that the first STF sequence is a partial sequence in the STF sequence of the second bandwidth, the multiple PPDUs in the first FD-A-PPDU can select different partial sequences in the STF sequence of the second bandwidth, thereby helping to reduce the PAPR of the STF.

[0170] In some embodiments, the partial sequence in the STF sequence of the second bandwidth can be a portion in the STF sequence of the second bandwidth corresponding to the frequency domain position of the first PPDU in the first FD-A-PPDU. In this case, the second bandwidth can be the bandwidth of the first FD-A-PPDU.

[0171] For example, in a case that the first bandwidth is 80MHz and the second bandwidth is 160MHz, the STF sequence of the second bandwidth can be divided into a first part and a second part. The first part can be a first half of the STF sequence of the second bandwidth, and the second part can be a second half of the STF sequence of the second bandwidth. The first part can correspond to a lower 80MHz bandwidth (i.e., a lower 80MHz sub-block in 160MHz), and the second part can correspond to a higher 80MHz bandwidth (i.e., a higher 80MHz sub-block in 160MHz). If the first PPDU occupies the lower 80MHz, the first STF sequence can be the first part. If the first PPDU occupies the higher 80MHz, the first STF sequence can be the second part.

[0172] For another example, in a case that the first bandwidth is 160MHz and the second bandwidth is 320MHz, the STF sequence of the second bandwidth can be divided into a first part and a second part. The first part can be a first half of the STF sequence of the second bandwidth, and the second part can be a second half of the STF sequence of the second bandwidth. The first part can correspond to a lower 160MHz bandwidth (i.e., a lower 160MHz sub-block in 320MHz), and the second part can correspond to a higher 160MHz bandwidth (i.e., a higher 160MHz sub-block in 320MHz). If the first PPDU occupies the lower 160MHz, the first STF sequence can be the first part. If the first PPDU occupies the higher 160MHz, the first STF sequence can be the second part.

[0173] For example, in the case that the first bandwidth is 80 MHz and the second bandwidth is 320 MHz, the STF sequence of the second bandwidth can be divided into a first part, a second part, a third part, and a fourth part. The first part can be the first 1 / 4 part of the STF sequence of the second bandwidth, the second part can be the second 1 / 4 part of the STF sequence of the second bandwidth, the third part can be the third 1 / 4 part of the STF sequence of the second bandwidth, and the fourth part can be the fourth 1 / 4 part of the STF sequence of the second bandwidth. The first part can correspond to the first 80 MHz bandwidth (i.e., the first 80 MHz sub-block) from low to high frequency, the second part can correspond to the second 80 MHz bandwidth (i.e., the second 80 MHz sub-block) from low to high frequency, the third part can correspond to the third 80 MHz bandwidth (i.e., the third 80 MHz sub-block) from low to high frequency, and the fourth part can correspond to the fourth 80 MHz bandwidth (i.e., the fourth 80 MHz sub-block) from low to high frequency. If the first PPDU occupies the first 80 MHz sub-block from low to high frequency, the first STF sequence can be the first part. If the first PPDU occupies the second 80 MHz sub-block from low to high frequency, the first STF sequence can be the second part. If the first PPDU occupies the third 80 MHz sub-block from low to high frequency, the first STF sequence can be the third part. If the first PPDU occupies the fourth 80 MHz sub-block from low to high frequency, the first STF sequence can be the fourth part.

[0174] Optionally, the first FD-A-PPDU can include a first PPDU and a second PPDU, and the first PPDU and the second PPDU can both use the part sequence corresponding to the frequency domain position in the STF sequence of the first FD-A-PPDU. It should be noted that, for the convenience of understanding, the following will be illustrated by taking case four and case five as examples.

[0175] Exemplarily, for case four, for an EHT PPDU, if the EHT PPDU is a non-TB PPDU, the part sequence corresponding to the 80 MHz sub-block where the EHT PPDU is located in the 160 MHz HE non-TB STF sequence is used; if the EHT PPDU is a TB PPDU, the part sequence corresponding to the 80 MHz sub-block where the EHT PPDU is located in the 160 MHz HE TB STF sequence is used. For a UHR PPDU, if the UHR PPDU is a non-TB PPDU, the part sequence corresponding to the 80 MHz sub-block where the UHR PPDU is located in the 160 MHz HE non-TB STF sequence is used; if the UHR PPDU is a TB PPDU, the part sequence corresponding to the 80 MHz sub-block where the UHR PPDU is located in the 160 MHz HE TB STF sequence is used.

[0176] Exemplarily, for case five, for the EHT PPDU, if the EHT PPDU is a non-TB PPDU, the part sequence corresponding to the 160MHz subblock where the EHT PPDU is located in the 320MHz EHT non-TB STF sequence is used; if the EHT PPDU is a TB PPDU, the part sequence corresponding to the 160MHz subblock where the EHT PPDU is located in the 320MHz EHT TB STF sequence is used. For the UHR PPDU, if the UHR PPDU is a non-TB PPDU, the part sequence corresponding to the 160MHz subblock where the UHR PPDU is located in the 320MHz EHT non-TB STF sequence is used; if the UHR PPDU is a TB PPDU, the part sequence corresponding to the 160MHz subblock where the UHR PPDU is located in the 320MHz EHT TB STF sequence is used.

[0177] Optionally, the first FD-A-PPDU can include a first PPDU and a second PPDU. The STF sequence used by the first PPDU is the part sequence corresponding to the frequency domain position in the STF sequence of the first FD-A-PPDU, and the second PPDU can use the STF sequence corresponding to the bandwidth of the second PPDU. Alternatively, the STF sequence used by the second PPDU is the part sequence corresponding to the frequency domain position in the STF sequence of the first FD-A-PPDU, and the first PPDU can use the STF sequence corresponding to the bandwidth of the first PPDU. It should be noted that, for the sake of understanding, the following is illustrated by taking cases one to three as examples.

[0178] Exemplarily, for case one, for the HE PPDU, if the HE PPDU is a non-TB PPDU, the 80MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, the 80MHz HE TB STF sequence is used. For the third PPDU, if the third PPDU is a non-TB PPDU, the part sequence corresponding to the 80MHz subblock where the third PPDU is located in the 160MHz HE non-TB STF sequence is used; if the third PPDU is a TB PPDU, the part sequence corresponding to the 80MHz subblock where the third PPDU is located in the 160MHz HE TB STF sequence is used.

[0179] Exemplarily, for case two, for the HE PPDU, if the HE PPDU is a non-TB PPDU, a 160MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, a 160MHz HE TB STF sequence is used. For the UHR PPDU, if the UHR PPDU is a non-TB PPDU, a part sequence corresponding to the 160MHz sub-block where the UHR PPDU is located in the 320MHz EHT non-TB STF sequence is used; if the UHR PPDU is a TB PPDU, a part sequence corresponding to the 160MHz sub-block where the UHR PPDU is located in the 320MHz EHT TB STF sequence is used.

[0180] Exemplarily, for case three, for the HE PPDU, if the HE PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the fourth PPDU, if the fourth PPDU is a non-TB PPDU, a part sequence corresponding to the 80MHz sub-block where the fourth PPDU is located in the 320MHz EHT non-TB STF sequence is used; if the fourth PPDU is a TB PPDU, a part sequence corresponding to the 80MHz sub-block where the fourth PPDU is located in the 320MHz EHT TB STF sequence is used. For the fifth PPDU, if the fifth PPDU is a non-TB PPDU, a part sequence corresponding to the 160MHz sub-block where the fifth PPDU is located in the 320MHz EHT non-TB STF sequence is used; if the fifth PPDU is a TB PPDU, a part sequence corresponding to the 160MHz sub-block where the fifth PPDU is located in the 320MHz EHT TB STF sequence is used.

[0181] In some embodiments, the part sequence in the STF sequence of the second bandwidth can be a part corresponding to a higher frequency in the STF sequence of the second bandwidth. The part corresponding to the higher frequency may, for example, be a later part in the STF sequence.

[0182] For example, in the case where the first bandwidth is 80MHz and the second bandwidth is 160MHz, the STF sequence of the second bandwidth can be divided into a first part and a second part. The first part can be a first half of the STF sequence of the second bandwidth, and the second part can be a second half of the STF sequence of the second bandwidth. The part corresponding to the higher frequency can be the second part. The first STF sequence can be the second part.

[0183] As described above, in the related art, the part corresponding to the lower frequency of the 160MHz STF sequence is the same as the 80MHz STF sequence. When the second PPDU in the first FD-A-PPDU uses the 80MHz STF sequence, the part corresponding to the higher frequency of the 160MHz STF sequence used by the first PPDU can make the STF sequences used by the first PPDU and the second PPDU different, thereby helping to reduce the PAPR.

[0184] Optionally, the first FD-A-PPDU can include the first PPDU and the second PPDU. The first PPDU can use the part corresponding to the higher frequency in the STF sequence of the first FD-A-PPDU, and the second PPDU can use the STF sequence corresponding to the bandwidth of the second PPDU. Alternatively, the STF sequence used by the second PPDU is the part corresponding to the higher frequency in the STF sequence of the first FD-A-PPDU, and the first PPDU can use the STF sequence corresponding to the bandwidth of the first PPDU. For ease of understanding, the following will be described by taking case one and case three as examples.

[0185] Exemplarily, for case one, for the HE PPDU, if the HE PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the third PPDU, if the third PPDU is a non-TB PPDU, the sequence corresponding to the higher 80MHz in the 160MHz HE non-TB STF sequence is used; if the third PPDU is a TB PPDU, the sequence corresponding to the higher 80MHz in the 160MHz HE TB STF sequence is used.

[0186] Exemplarily, for case three, for the HE PPDU, if the HE PPDU is a non-TB PPDU, an 80MHz HE non-TB STF sequence is used; if the HE PPDU is a TB PPDU, an 80MHz HE TB STF sequence is used. For the fourth PPDU, if the fourth PPDU is a non-TB PPDU, the sequence corresponding to the higher 80MHz in the 160MHz HE non-TB STF sequence is used; if the fourth PPDU is a TB PPDU, the sequence corresponding to the higher 80MHz in the 160MHz HE TB STF sequence is used. For the fifth PPDU, if the fifth PPDU is a non-TB PPDU, a 160MHz HE non-TB STF sequence is used; if the fifth PPDU is a TB PPDU, a 160MHz HE TB STF sequence is used.

[0187] In some embodiments, if one or more subchannels in the first FD-A-PPDU are punctured, the value of the tone index of the STF sequence corresponding to the punctured one or more subchannels can be 0. Wherein the bandwidth of the punctured subchannel can be 20MHz.

[0188] For the convenience of understanding the present application, the present application is described in detail below through Embodiment 1 to Embodiment 8. It should be noted that the FD-A-PPDU in Embodiment 1 to Embodiment 8 can be the first FD-A-PPDU in the present application, and any PPDU contained in the FD-A-PPDU can be the first PPDU in the present application.

[0189] Embodiment 1

[0190] Embodiment 1 proposes a solution for the case that the third PPDU is HE PPDU (by UHR STA) in Case 1.

[0191] FIG. 6 is an example diagram of a determination method of an STF sequence provided by Embodiment 1. In FIG. 6, the HE PPDU (including the HE PPDU shown in FIG. 6 and the HE PPDU (by UHR STA)) constituting the 160MHz FD-A-PPDU are all non-TB PPDUs. Example 1.1 is that the HE PPDU is in the lower 80MHz, and example 1.2 is that the HE PPDU is in the higher 80MHz.

[0192] In FIG. 6, the HE PPDU uses the 80MHz non-TB STF frequency sequence (framed by the solid line box), and the HE PPDU (by UHR STA) uses the frequency sequence in the higher 80MHz part of the 160MHz non-TB STF frequency sequence (framed by the dashed line box).

[0193] Embodiment 2

[0194] Embodiment 2 proposes a solution for the case that the third PPDU is HE PPDU (by UHR STA) in Case 1.

[0195] FIG. 7 is an example diagram of a determination method of an STF sequence provided by Embodiment 2. In FIG. 7, the HE PPDU (including the HE PPDU shown in FIG. 7 and the HE PPDU (by UHR STA)) constituting the 160MHz FD-A-PPDU are all non-TB PPDUs. Example 2.1 is that the HE PPDU is in the lower 80MHz, and example 2.2 is that the HE PPDU is in the higher 80MHz.

[0196] In embodiment 1, the HE PPDU (by UHR STA) uses the part of the 160MHz non-TB STF frequency sequence corresponding to the sub-block where the PPDU is located.

[0197] In example 2.1, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by solid line), and the HE PPDU (by UHR STA) uses the part of the 160MHz non-TB STF frequency sequence corresponding to the higher 80MHz (boxed by dashed line).

[0198] In example 2.2, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by solid line), and the HE PPDU (by UHR STA) uses the part of the 160MHz non-TB STF frequency sequence corresponding to the lower 80MHz (boxed by solid line).

[0199] Embodiment 3

[0200] Embodiment 3 is a solution for the case that the third PPDU is a HE PPDU (by UHR STA) in case 1.

[0201] FIG. 8 is an example diagram of a method of determining STF sequence provided by embodiment 3. In FIG. 8, the HE PPDU (including the HE PPDU and the HE PPDU (by UHR STA) shown in FIG. 8) constituting the 160MHz FD-A-PPDU are all non-TB PPDUs. Example 3.1 is that the HE PPDU is in the lower 80MHz, and example 3.2 is that the HE PPDU is in the higher 80MHz.

[0202] In embodiment 3, the HE PPDU and the HE PPDU (by UHR STA) both use the 80MHz non-TB STF frequency sequence (boxed by solid line).

[0203] Embodiment 4

[0204] Embodiment 4 is a solution for case 2.

[0205] FIG. 9 is an example diagram of a method of determining STF sequence provided by embodiment 4. In FIG. 9, the HE PPDU and the UHR PPDU constituting the 320MHz FD-A-PPDU are both non-TB PPDUs. Example 4.1 is that the HE PPDU is in the lower 160MHz, and example 4.2 is that the HE PPDU is in the higher 160MHz.

[0206] In embodiment 4, the HE PPDU uses 160MHz HE STF frequency sequence, and the UHR PPDU uses the part of 320MHz EHT STF frequency sequence corresponding to the sub-block where the UHR PPDU is located.

[0207] In example 4.1, the HE PPDU uses 160MHz non-TB STF frequency sequence (boxed by solid line), and the UHR PPDU uses the part of 320MHz non-TB STF frequency sequence corresponding to the higher 160MHz (boxed by dashed line).

[0208] In example 4.2, the HE PPDU uses 160MHz non-TB STF frequency sequence (boxed by solid line), and the UHR PPDU uses the part of 320MHz non-TB STF frequency sequence corresponding to the lower 160MHz (boxed by dot-dashed line).

[0209] Embodiment 5

[0210] Embodiment 5 is a solution proposed for case 2.

[0211] FIG. 10 is an example diagram of a method of determining STF sequence provided by embodiment 5. In FIG. 10, both the HE PPDU and the UHR PPDU constituting the 320MHz FD-A-PPDU are non-TB PPDUs. Example 5.1 is for the case where the HE PPDU is in the lower 160MHz, and example 5.2 is for the case where the HE PPDU is in the higher 160MHz.

[0212] Both the HE PPDU and the UHR PPDU use 160MHz non-TB HE STF frequency sequence (boxed by solid line).

[0213] Embodiment 6

[0214] Embodiment 6 is a solution proposed for case 3. In embodiment 6, the fourth PPDU is a HE PPDU (by a UHR STA), and the fifth PPDU is a UHR PPDU.

[0215] FIG. 11A and FIG. 11B are example diagrams of a method of determining STF sequence provided by embodiment 6, respectively. In FIG. 11A and FIG. 11B, both the PPDUs constituting the FD-A-PPDU are non-TB PPDUs. FIG. 11A shows example 6.1 and example 6.2. FIG. 11B shows example 6.3 and example 6.4.

[0216] In embodiment 6, the HE PPDU (by UHR STA) uses the part of the 320MHz EHT STF frequency sequence corresponding to the subblock where the HE PPDU (by UHR STA) is located. The UHR PPDU uses the part of the 320MHz EHT STF frequency sequence corresponding to the subblock where the UHR PPDU is located.

[0217] In example 6.1, the HE PPDU is in the first 80MHz. In example 6.2, the HE PPDU is in the second 80MHz. In example 6.3, the HE PPDU is in the third 80MHz. In example 6.4, the HE PPDU is in the fourth 80MHz.

[0218] In example 6.1, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by the black solid line), the HE PPDU for UHR STA uses the part of the 320MHz non-TB STF frequency sequence of the second 80MHz (boxed by the dot-dash line), and the UHR PPDU uses the part of the 320MHz non-TB STF frequency sequence of the higher 160MHz (boxed by the dashed line).

[0219] In example 6.2, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by the black solid line), the HE PPDU for UHR STA uses the part of the 320MHz non-TB STF frequency sequence of the first 80MHz (boxed by the grey solid line), and the UHR PPDU uses the part of the 320MHz non-TB STF frequency sequence of the higher 160MHz (boxed by the dashed line).

[0220] In example 6.3, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by the black solid line), the HE PPDU for UHR STA uses the part of the 320MHz non-TB STF frequency sequence of the fourth 80MHz (boxed by the dashed line), and the UHR PPDU uses the part of the 320MHz non-TB STF frequency sequence of the lower 160MHz (boxed by the grey solid line).

[0221] In Example 6.4, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by the solid black line), the HE PPDU for UHR STA uses the partial frequency sequence of the third 80MHz of the 320MHz non-TB STF frequency sequence (boxed by the dotted line), and the UHR PPDU uses the partial frequency sequence of the lower 160MHz of the 320MHz non-TB STF frequency sequence (boxed by the solid black line).

[0222] Embodiment 7

[0223] Embodiment 7 is a solution proposed for Case 3. In Embodiment 7, the fourth PPDU is a HE PPDU (by UHR STA), and the fifth PPDU is a UHR PPDU.

[0224] FIG. 12 is an example diagram of a method of determining STF sequences provided by Embodiment 7. In FIG. 12, all the PPDUs constituting the FD-A-PPDU are non-TB PPDUs.

[0225] In Embodiment 7, the HE PPDU uses the 80MHz HE STF frequency domain sequence. The HE PPDU (by UHR STA) uses the partial corresponding to the higher 80MHz sub-block of the 160MHz HE STF frequency domain sequence. The UHR PPDU uses the 160MHz HE STF frequency domain sequence.

[0226] In Example 7.1, the HE PPDU is in the first 80MHz. In Example 7.2, the HE PPDU is in the second 80MHz. In Example 7.3, the HE PPDU is in the third 80MHz. In Example 7.4, the HE PPDU is in the fourth 80MHz.

[0227] In Examples 7.1, 7.2, 7.3, and 7.4, the HE PPDU uses the 80MHz non-TB STF frequency sequence (boxed by the solid black line), the HE PPDU for UHR STA uses the partial frequency sequence of the higher 80MHz of the 160MHz non-TB STF frequency sequence (boxed by the dotted line), and the UHR PPDU uses the 160MHz non-TB STF frequency sequence (boxed by the dashed line).

[0228] Embodiment 8

[0229] Embodiment 8 is a solution proposed for Case 3. In Embodiment 7, the fourth PPDU is a HE PPDU (by UHR STA) and the fifth PPDU is a UHR PPDU.

[0230] FIG. 13 is an example diagram of a method for determining a STF sequence provided by Embodiment 8. In FIG. 13, all the PPDUs constituting the FD-A-PPDU are non-TB PPDUs.

[0231] In Embodiment 8, the HE PPDU uses an 80MHz HE STF frequency sequence. The HE PPDU (by UHR STA) uses an 80MHz HE STF frequency sequence. The UHR PPDU uses a 160MHz HE STF frequency sequence.

[0232] In Example 8.1, the HE PPDU is in the first 80MHz. The HE PPDU uses an 80MHz non-TB STF frequency sequence (boxed by a solid line), the HE PPDU for UHR STA uses an 80MHz non-TB STF frequency sequence (boxed by a solid line), and the UHR PPDU uses a 160MHz non-TB STF frequency sequence (boxed by a dashed line).

[0233] The inventors of the present application performed PAPR simulation of the STF sequence for Embodiments 1-8. The simulation results are as follows.

[0234] As described above, Embodiments 1-3 are all for the case that the 160MHz FD-A-PPDU contains an 80MHz HE PPDU and an 80MHz HE PPDU (by UHR STA). Table 1 shows the PAPR results of the non-TB STF sequence of Embodiments 1-3. The last row in Table 1 shows the PAPR result of the 160MHz non-TB STF sequence defined in the related art.

[0235] Table 1

[0236] As can be seen from Table 1, the PAPR of Embodiment 1 is the lowest and can even be lower than the PAPR of the related art. The PAPR of Example 2.2 in Embodiment 2 is relatively high.

[0237] Embodiments 4 and 5 are both for the case that the 320MHz FD-A-PPDU contains a 160MHz HE PPDU and a 160MHz UHR PPDU.

[0238] Table 2 shows the PAPR results of non-TB STF sequences for the non-puncturing case of Example 4 and Example 5. The last row in Table 2 shows the PAPR results of the 320MHz non-TB STF sequence defined in the related art.

[0239] Table 2

[0240] As can be seen from Table 2, the PAPR of Example 5 is relatively low.

[0241] Figures 14A and 14B show the PAPR of non-TB STF sequences for the puncturing case of Example 4 and Example 5. Figure 14A is the case where the HE PPDU is in the lower 160MHz, the UHR PPDU is in the upper 160MHz and is punctured. Figure 14B is the case where the HE PPDU is in the upper 160MHz, the UHR PPDU is in the lower 160MHz and is punctured. As can be seen from Figures 14A and 14B, the PAPR performance of Example 4 is closer to the 320MHz non-TB STF sequence (baseline defined in the related art).

[0242] Examples 6-8 are all for the case where the 320MHz FD-A-PPDU contains an 80MHz HE PPDU, an 80MHz HE PPDU (by a UHR STA) and a 160MHz UHR PPDU. Table 3 shows the PAPR results of non-TB STF sequences for Examples 6-8. The last row in Table 3 shows the PAPR results of the 320MHz non-TB STF sequence defined in the related art.

[0243] Table 3

[0244] As can be seen from Table 3, the PAPR of Example 6 is the lowest.

[0245] It should be noted that, as described above, in the related art, the HE STF sequence and the EHT STF sequence are the same under 80MHz or 160MHz. Therefore, the “80MHz HE non-TB STF sequence” and the “80MHz EHT non-TB STF sequence” can be replaced with each other. The “80MHz HE TB STF sequence” and the “80MHz EHT TB STF sequence” can be replaced with each other. The “160MHz HE non-TB STF sequence” and the “160MHz EHT non-TB STF sequence” can be replaced with each other. The “160MHz HE TB STF sequence” and the “160MHz EHT TB STF sequence” can be replaced with each other.

[0246] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0247] FIG. 15 is a schematic structural diagram of a communication device 1500 provided by an embodiment of the present application. The communication device 1500 can be a first device. The communication device 1500 can include a sending unit 1510.

[0248] The sending unit 1510 is configured to send a first PPDU to a second device; wherein the first PPDU belongs to a first frequency domain aggregation PPDU, and a first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0249] In the embodiments of the present application, the communication device 1500 described above can be configured to perform part or all of the method steps performed by the first device in the method embodiments described above. The method flow has been described in detail in the foregoing embodiments, and the modules in the present embodiment have the same functions or perform the same steps, which will not be described here again. However, as a person skilled in the art should know that the foregoing description corresponding to the accompanying drawings can be introduced into the present embodiment, and the modules in the communication device 1500 correspond thereto.

[0250] In optional embodiments, the sending unit 1510 can be a transceiver 1730. The communication device 1500 can further include a processor 1710 and a memory 1720, as shown in FIG. 17.

[0251] FIG. 16 is a schematic structural diagram of a communication device 1600 provided in an embodiment of the present application. The communication device 1600 can be a second device. The communication device 1600 can include a receiving unit 1610.

[0252] The receiving unit 1610 is configured to receive a first PPDU sent by a first device. The first PPDU belongs to a first frequency domain aggregation PPDU.

[0253] A first STF sequence of the first PPDU is determined based on one or more of the following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

[0254] In an embodiment of the present application, the communication device 1600 described above can be configured to perform part or all of the method steps performed by the second device in the above method embodiments. The method flow has been described in detail in the foregoing embodiments, and the modules in the present embodiment have the same functions or perform the same steps, which will not be described here in detail. However, it should be known by those skilled in the art that the foregoing description corresponding to the accompanying drawings can be introduced into the present embodiment, and the modules in the communication device 1600 correspond thereto.

[0255] In an optional embodiment, the receiving unit 1610 can be a transceiver 1730. The communication device 1600 can further include a processor 1710 and a memory 1720, as shown in FIG. 17.

[0256] FIG. 17 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 17 indicates that the unit or module is optional. The apparatus 1700 can be configured to implement the methods described in the above method embodiments. The apparatus 1700 can be a chip or a communication device.

[0257] The apparatus 1700 can include one or more processors 1710. The processor 1710 can support the apparatus 1700 to implement the methods described in the foregoing method embodiments. The processor 1710 can be a general purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0258] The apparatus 1700 can further include one or more memories 1720. The memory 1720 stores a program that can be executed by the processor 1710, so that the processor 1710 performs the methods described in the foregoing method embodiments. The memory 1720 can be independent of the processor 1710 or integrated in the processor 1710.

[0259] The apparatus 1700 can further include a transceiver 1730. The processor 1710 can communicate with other devices or chips through the transceiver 1730. For example, the processor 1710 can perform data transceiving with other devices or chips through the transceiver 1730.

[0260] The embodiments of the present application further provide a computer readable storage medium for storing a program. The computer readable storage medium can be applied to the communication device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0261] The embodiments of the present application further provide a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided by the embodiments of the present application, and the program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0262] The embodiments of the present application further provide a computer program. The computer program can be applied to the communication device provided by the embodiments of the present application, and the computer program causes the computer to execute the method performed by the communication device in the various embodiments of the present application.

[0263] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0264] In embodiments of the present application, a "field" can also be referred to as a "domain", a "subfield" or a "subdomain". A field can occupy one or more bytes (octets), or a field can occupy one or more bits.

[0265] The field names defined in embodiments of the present application are only examples, and the fields can have other names.

[0266] In embodiments of the present application, "indication" can be direct indication, indirect indication, or can indicate an associated relationship. For example, A indicates B, which can mean that B can be obtained directly through A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or it can mean that A and B have an associated relationship.

[0267] In embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0268] In embodiments of the present application, the term "corresponding" can mean a direct or indirect corresponding relationship between the two, or can mean an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, etc.

[0269] In embodiments of the present application, "predefined" or "preconfigured" can be achieved by pre-saving corresponding codes, tables or other ways that can be used to indicate related information in devices (for example, including AP and STA), and the specific implementation of the present application is not limited. For example, predefinition can mean definition in a protocol.

[0270] In embodiments of the present application, the term "and / or" is only a description of the associated relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally means that the front and rear associated objects are in an "or" relationship.

[0271] In the embodiments of the present application, the "comprising" can mean directly comprising or indirectly comprising. Alternatively, the "comprising" mentioned in the embodiments of the present application can be replaced by "indicating" or "for determining". For example, A comprising B can be replaced by A indicating B, or A for determining B.

[0272] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0273] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, it can include WiFi protocol and related protocols applied to future WiFi communication systems, which is not limited in the present application.

[0274] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can be in another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0275] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0276] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0277] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present application are generated. 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 one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0278] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: Comprising: a first device sending a first physical layer protocol data unit (PPDU) to a second device; wherein the first PPDU belongs to a first frequency domain aggregation (FDA) PPDU, and a first short training field (STF) sequence of the first PPDU is determined based on one or more of: a bandwidth of the first PPDU, a bandwidth of the first FDA PPDU, a frequency domain location of the first PPDU in the first FDA PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

2. The method of claim 1, wherein, The bandwidth of the first PPDU is a first bandwidth, and the first STF sequence is an STF sequence corresponding to the first bandwidth.

3. The method of claim 2, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is an STF sequence corresponding to the first bandwidth.

4. The method of claim 3, wherein, The first amendment is high efficiency (HE) or extremely high throughput (EHT).

5. The method of claim 2, wherein, In a case where the first PPDU satisfies a first condition, the first STF sequence is an STF sequence corresponding to the first bandwidth, and the first condition comprises one or more of: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device comprises a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device comprises a second amendment; The amendment corresponding to the first PPDU is a second amendment.

6. The method of claim 5, wherein, The first amendment is HE, and the second amendment is ultra-high reliability (UHR).

7. The method of claim 1, wherein, The first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second bandwidth is greater than the bandwidth of the first PPDU.

8. The method of claim 7, wherein, In a case where a second condition is satisfied, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second condition comprises one or more of: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device comprises a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device comprises a second amendment; The amendment corresponding to the first PPDU is a second amendment.

9. The method of claim 8, wherein, The first amendment is HE, and the second amendment is UHR.

10. The method of claim 7, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth.

11. The method of claim 10, wherein, The first amendment is EHT.

12. The method according to any one of claims 7-11, characterized in that, The partial sequence is a part corresponding to a higher frequency in the STF sequence of the second bandwidth.

13. The method according to any one of claims 7-11, characterized in that, The partial sequence is a part corresponding to a higher frequency in the STF sequence of the second bandwidth.

14. The method according to any one of claims 7-13, characterized in that, The second bandwidth is a bandwidth of the first FDA PPDU.

15. A method of wireless communication, the method comprising: Comprising: a second device receiving a first physical layer protocol data unit (PPDU) sent by a first device; The first PPDU belongs to a first frequency domain aggregation PPDU, and a first short training field, STF, sequence of the first PPDU is determined based on one or more of a following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

16. The method of claim 15, wherein, The first PPDU has a first bandwidth, and the first STF sequence is an STF sequence corresponding to the first bandwidth.

17. The method of claim 16, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is an STF sequence corresponding to the first bandwidth.

18. The method of claim 17, wherein, The first amendment is high efficiency, HE, or extremely high throughput, EHT.

19. The method of claim 16, wherein, In a case where the first PPDU satisfies a first condition, the first STF sequence is an STF sequence corresponding to the first bandwidth, and the first condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

20. The method of claim 19, wherein, The first amendment is HE, and the second amendment is ultra-high reliability, UHR.

21. The method of claim 15, wherein, The first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second bandwidth is greater than a bandwidth of the first PPDU.

22. The method of claim 21, wherein, In a case where a second condition is satisfied, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

23. The method of claim 22, wherein, The first amendment is HE, and the second amendment is UHR.

24. The method of claim 21, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth.

25. The method of claim 24, wherein, The first amendment is EHT.

26. The method of any one of claims 21-25, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU.

27. The method of any one of claims 21-25, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a higher frequency.

28. The method of any one of claims 21-27, wherein, The second bandwidth is a bandwidth of the first frequency domain aggregation PPDU.

29. A communications device, characterized by The communication device is a first device, and the communication device includes: a sending unit configured to send, to a second device, a first physical layer protocol data unit, PPDU; and a receiving unit configured to receive, from the second device, a second PPDU. The first PPDU belongs to a first frequency domain aggregation PPDU, and a first short training field, STF, sequence of the first PPDU is determined based on one or more of a following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

30. The communication device of claim 29, wherein, The first PPDU has a first bandwidth, and the first STF sequence is an STF sequence corresponding to the first bandwidth.

31. The communication device of claim 30, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is an STF sequence corresponding to the first bandwidth.

32. The communication device of claim 31, wherein, The first amendment is high efficiency, HE, or extremely high throughput, EHT.

33. The communication device of claim 30, wherein, In a case where the first PPDU satisfies a first condition, the first STF sequence is an STF sequence corresponding to the first bandwidth, and the first condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

34. The communication device of claim 33, wherein, The first amendment is HE, and the second amendment is ultra-high reliability, UHR.

35. The communication device of claim 29, wherein, The first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second bandwidth is greater than a bandwidth of the first PPDU.

36. The communication device of claim 35, wherein, In a case where a second condition is satisfied, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

37. The communication device of claim 36, wherein, The first amendment is HE, and the second amendment is UHR.

38. The communication device of claim 35, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth.

39. The communication device of claim 36, wherein, The first amendment is EHT.

40. The communication device of any of claims 35-39, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU.

41. The communication device of any of claims 35-39, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a higher frequency.

42. The communication device of any of claims 35-41, wherein, The second bandwidth is a bandwidth of the first frequency domain aggregation PPDU.

43. A communications device, characterized by The communication device is a second device, and the communication device includes: a receiving unit configured to receive a first physical layer protocol data unit, PPDU, transmitted by a first device; and a determining unit configured to determine a first short training field, STF, sequence of the first PPDU based on one or more of a following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device. The first PPDU belongs to a first frequency domain aggregation PPDU, and a first short training field (STF) sequence of the first PPDU is determined based on one or more of a following: a bandwidth of the first PPDU, a bandwidth of the first frequency domain aggregation PPDU, a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU, an amendment corresponding to the first PPDU, an amendment supported by the first device, and an amendment supported by the second device.

44. The communication device of claim 43, wherein, The first PPDU has a first bandwidth, and the first STF sequence is an STF sequence corresponding to the first bandwidth.

45. The communication device of claim 44, wherein, In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is an STF sequence corresponding to the first bandwidth.

46. The communication device of claim 45, wherein, The first amendment is high efficiency (HE) or extremely high throughput (EHT).

47. The communication device of claim 44, wherein, In a case where the first PPDU satisfies a first condition, the first STF sequence is an STF sequence corresponding to the first bandwidth, and the first condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

48. The communication device of claim 47, wherein, The first amendment is HE, and the second amendment is ultra-high reliability (UHR).

49. The communication device of claim 43, wherein, The first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second bandwidth is greater than the bandwidth of the first PPDU.

50. The communication device of claim 49, wherein, In a case where a second condition is satisfied, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth, and the second condition includes one or more of the following: The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the first device includes a second amendment; The amendment corresponding to the first PPDU is a first amendment, and a type of amendment supported by the second device includes a second amendment; The amendment corresponding to the first PPDU is a second amendment.

51. The communication device of claim 50, wherein, The first amendment is HE, and the second amendment is UHR.

52. The communications device of claim 49, wherein In a case where the amendment corresponding to the first PPDU is a first amendment, the first STF sequence is a partial sequence in an STF sequence of a second bandwidth.

53. The communication device of claim 52, wherein, The first amendment is EHT.

54. The communication device of any of claims 49-53, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a frequency domain position of the first PPDU in the first frequency domain aggregation PPDU.

55. The communication device of any of claims 49-53, wherein, The partial sequence is a portion of the STF sequence of the second bandwidth corresponding to a higher frequency.

56. The communication device of any of claims 49-55, wherein, The second bandwidth is a bandwidth of the first frequency domain aggregation PPDU.

57. A communications device, characterized by A communication device includes a transceiver, a memory, and a processor. The memory is configured to store a program. The processor is configured to invoke the program in the memory and control the transceiver to receive or send a signal, so that the communication device performs the method in any one of claims 1-28.

58. An apparatus, comprising: comprising a processor for calling a program from a memory to cause the apparatus to perform the method of any of claims 1-28.

59. A chip, comprising: comprising a processor for calling a program from a memory to cause the apparatus to perform the method of any of claims 1-28.

60. A computer-readable storage medium, characterized in that, having stored thereon a program which causes a computer to perform the method of any of claims 1-28.

61. A computer program product, characterised in that, comprising a program which causes a computer to perform the method of any of claims 1-28.

62. A computer program, characterized in that, The computer program causes a computer to perform the method of any of claims 1-28. The computer program causes a computer to perform the method of any of claims 1-28.

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