Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: on the basis of a PPDU format, a first device receives downlink data sent by a second device and sends uplink data to the second device, wherein the PPDU format comprises a preamble part, a downlink part, and an uplink part, the downlink part comprises the downlink data, and the uplink part comprises the uplink data. Upon receiving, on the basis of a PPDU format, downlink data sent by a second device, a first device can send uplink data following the downlink data without waiting for resources used for sending the uplink data, and an uplink part and a downlink part can share a preamble part, thereby reducing signaling overhead and improving data transmission efficiency.

Description

Wireless communication methods and communication devices Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a method and device for wireless communication. Background Technology

[0002] Since the energy harvesting efficiency and energy storage capacity of ambient powered (AMP) devices are limited, their data transmission rate is affected. Therefore, improving the data transmission efficiency of AMP devices has become a problem that needs to be solved.

[0003] Summary of the Invention

[0004] This application provides a method and apparatus for wireless communication. The various aspects covered by this application are described below.

[0005] In a first aspect, a wireless communication method is provided, comprising: a first device receiving downlink data sent by a second device and sending uplink data to the second device based on a PPDU format; wherein the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0006] In a second aspect, a wireless communication method is provided, comprising: a second device transmitting downlink data to a first device and receiving uplink data transmitted by the first device based on a PPDU format; wherein the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0007] Thirdly, a communication device is provided, the communication device being a first device, comprising: a transceiver unit, configured to receive downlink data sent by a second device and send uplink data to the second device based on a PPDU format; wherein the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0008] Fourthly, a communication device is provided, the communication device being a second device, comprising: a transceiver unit, configured to send downlink data to a first device and receive uplink data sent by the first device based on a PPDU format; wherein the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0009] Fifthly, a communication device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, and the processor is used to invoke the program in the memory and control the transceiver to receive or send signals, so that the communication device performs the method as described in the first or second aspect.

[0010] A sixth aspect provides an apparatus including a processor for calling a program from a memory to cause the apparatus to perform the method as described in the first or second aspect.

[0011] A seventh aspect provides a chip including a processor for calling a program from a memory, causing a device having the chip mounted to perform the method as described in the first or second aspect.

[0012] Eighthly, a computer-readable storage medium is provided having a program stored thereon that causes a computer to perform the method as described in the first or second aspect.

[0013] Ninth aspect, a computer program product is provided, including a program that causes a computer to perform the method as described in the first or second aspect.

[0014] Eighthly, a computer program is provided that causes a computer to perform the method as described in the first or second aspect.

[0015] This application provides a novel PPDU format, which may include a preamble, a downlink portion, and an uplink portion. Based on this PPDU format, after receiving downlink data sent by a second device, a first device can send uplink data following the downlink data without waiting for resources to send the uplink data. Furthermore, the uplink portion and the downlink portion can share the preamble, thereby saving signaling overhead and improving data transmission efficiency. Attached Figure Description

[0016] Figure 1 is a system architecture example diagram of a wireless communication system applicable to embodiments of this application.

[0017] Figure 2 is a structural example diagram of an AMP device.

[0018] Figure 3 is a structural example of the energy harvesting module in Figure 2.

[0019] Figure 4 is a schematic diagram of the backscatter communication process of the AMP device.

[0020] Figure 5 is a schematic diagram showing that the uplink and downlink communications of the AMP device are independent of each other.

[0021] Figure 6 is a flowchart illustrating the wireless communication method provided in an embodiment of this application.

[0022] Figure 7 is a schematic diagram of the PPDU format provided in an embodiment of this application.

[0023] Figures 8 to 11 are schematic diagrams of the possible formats of the downlink and uplink portions in the PPDU format shown in Figure 7.

[0024] Figure 12 is a schematic diagram of the PPDU format shown in Figure 11 without GP.

[0025] Figure 13 is a schematic diagram of the PPDU format provided in another embodiment of this application.

[0026] Figure 14 is a schematic diagram of one indication method of the PPDU format shown in Figure 13.

[0027] Figure 15 is a schematic diagram of another indication method of the PPDU format shown in Figure 13.

[0028] Figure 16 is a schematic diagram of the PPDU format in an AMP tag-based communication system.

[0029] Figure 17 is a schematic diagram of the structure of a communication device provided in an embodiment of this application.

[0030] Figure 18 is a schematic diagram of the structure of a communication device provided in another embodiment of this application.

[0031] Figure 19 is a schematic diagram of an apparatus applicable to embodiments of this application. Detailed Implementation

[0032] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0033] Communication system

[0034] The technical solutions of this application can be applied to various communication systems, such as wireless local area networks (WLAN), wireless fidelity (Wi-Fi), high-performance radio local area networks (HIPELAN), wide area networks (WAN), cellular networks, or other communication systems. For example, the technical solutions provided in this application can be applied to communication systems using the 802.11 standard. Exemplarily, the 802.11 standard includes, but is not limited to, the 802.11ax standard, the 802.11be standard, and next-generation 802.11 standards.

[0035] Figure 1 shows a schematic diagram of a communication system applicable to an embodiment of this application. Referring to Figure 1, the communication devices in the communication system 100 may include access points (APs) 111 and 112, and stations (STAs) 121 and 122. STA 121 can access the network through AP 111, and STA 122 can access the network through AP 112.

[0036] In some implementations, a STA can establish an association with one or more APs, after which the associated STAs and APs can communicate with each other. As shown in Figure 1, AP 111 and STA 121 can communicate after establishing an association, and AP 112 and STA 122 can communicate after establishing an association.

[0037] In some implementations, the communication in the communication system 100 can be communication between an AP and a non-AP STA, communication between two non-AP STAs, or communication between a STA and a peer STA. Here, a peer STA can refer to a device that communicates with the STA's counterpart. For example, a peer STA may be an AP or a non-AP STA.

[0038] It should be understood that Figure 1 exemplarily shows two AP STAs and two non-AP STAs. The communication system 100 may also include more AP STAs, or the communication system 100 may include other numbers of non-AP STAs. This application embodiment does not limit this.

[0039] In addition, the above-mentioned communication system can be applied to scenarios involving multi-device collaboration, such as multi-AP (multi-access points) collaboration or multi-site collaboration.

[0040] In the embodiments of this application, the names of AP and / or STA are not limited. In some scenarios, AP can also be called AP STA, that is, in a sense, AP is also a type of STA. In other scenarios, STA can be called non-AP STA.

[0041] In some scenarios, the aforementioned communication equipment can also be a "multi-link device (MLD)," meaning a device that can communicate through multiple communication links. These multiple communication links can include communication links in different frequency bands, such as millimeter-wave bands and / or low-frequency bands. Typically, if the multi-link device is an access point (AP), it can also be called a "multi-link AP." If the multi-link device is a stand-alone device (STA), it can also be called a "multi-link STA."

[0042] In this application embodiment, the AP can be a device in a wireless network. The AP can be a communication server, router, switch, bridge, or other communication entity. Alternatively, the AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP can also be a chip, circuit, or processing system within these various forms of devices, thereby implementing the methods and functions of this application embodiment. APs can be applied in various scenarios, such as sensor nodes in smart cities (e.g., smart water meters, smart electricity meters, smart air quality monitoring nodes), smart devices in smart homes (e.g., smart cameras, projectors, displays, televisions, audio equipment, refrigerators, washing machines, etc.), nodes in the Internet of Things (IoT), entertainment terminals (e.g., AR, VR, and other wearable devices), smart devices in smart offices (e.g., printers, projectors, etc.), vehicle-to-everything (V2X) devices, and some infrastructure in daily life scenarios (e.g., vending machines, supermarket self-service navigation kiosks, self-service checkout machines, self-service ordering machines, etc.).

[0043] In some implementations, the role of the STA in the communication system is not absolute; in some scenarios, the STA can act as an AP. For example, in a scenario where a mobile phone connects to a router, the mobile phone can be a non-AP STA, while when the mobile phone acts as a hotspot for other mobile phones, it takes on the role of an AP.

[0044] In the embodiments of this application, the STA can be a device with wireless transceiver capabilities, such as one that supports the 802.11 series of protocols and can communicate with the AP or other STAs. For example, an STA is any user communication device that allows users to communicate with the AP and thus with the WLAN. STAs include, for example, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0045] In this application embodiment, the STA can also be a device that provides voice / data connectivity to the user, such as a handheld device or vehicle-mounted device with wireless connectivity. Examples include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in 5G networks, or future public land mobile communication networks. Terminal devices in a network (PLMN), etc., are not limited to this in the embodiments of this application.

[0046] By way of example and not limitation, in this embodiment, the STA can also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Examples include smartwatches or smart glasses, as well as devices that focus on a specific application function and require cooperation with other devices such as smartphones, such as various smart bracelets and smart jewelry for monitoring vital signs.

[0047] Furthermore, in this embodiment, the STA can also be a terminal device in an Internet of Things (IoT) system. IoT is an important component of future information technology development, and its main technical feature is connecting objects to networks through communication technologies, thereby realizing an intelligent network for human-machine interconnection and object-to-object interconnection. In this embodiment, IoT technology can achieve massive connectivity, deep coverage, and low terminal power consumption through technologies such as narrowband (NB).

[0048] Furthermore, in this embodiment, the STA can be a device in a vehicle-to-everything (V2X) system. The communication methods in a V2X system are collectively referred to as V2X (where X represents anything). For example, 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.

[0049] In addition, in the embodiments of this application, the STA may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (some terminal devices), receiving control information and downlink data from the AP, and sending electromagnetic waves to transmit data to the AP.

[0050] In addition, the AP in this application embodiment 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 to communicate with the STA through the wireless local area network.

[0051] From the perspective of the communication standards supported by the AP, in some implementations, the AP can be a device that supports the 802.11be standard. The AP can also be a device that supports various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0052] From the perspective of the communication standards supported by the STA, in some implementations, non-AP STAs can support the 802.11be standard. Non-AP STAs can also support various current and future 802.11 family of wireless local area networks (WLAN) standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0053] In this application embodiment, the frequency bands supported by WLAN technology are not limited. In some implementations, the frequency bands supported by WLAN technology may include, but are not limited to: low frequency bands (e.g., 2.4GHz, 5GHz, 6GHz) and high frequency bands (e.g., 45GHz, 60GHz).

[0054] It should be understood that the specific forms of STA and AP are not specifically limited in the embodiments of this application, and are merely illustrative examples.

[0055] Physical layer protocol data unit (PPDU)

[0056] PPDU frames are fundamental for information transmission in Wi-Fi systems. Typically, a PPDU format includes a physical layer preamble, a physical layer header, and a data portion. For example, in the 802.11a / g protocol, the physical layer portion can include three parts: a short training field (STF), a long training field (LTF), and a signal. In other words, the PPDU frame carries specific settings for the STF, LTF, and data portion.

[0057] The STF (Standard Frequency Frame) consists of 10 short symbols (t1-t10), each 0.8µs in length. It includes multiple functions, primarily for frame synchronization and coarse frequency synchronization. T1-t7 mainly include signal detection, automatic gain control (AGC), and diversity selection; T8-t10 mainly include coarse frequency synchronization, offset estimation, and timing synchronization. The LTF (Local Frequency Frame) is used for fine frequency synchronization and channel estimation. The signal portion carries information related to the data portion, such as data transmission rate, data length, parity bits, reserved bits, and tail bits. The data portion of the PPDU frame carries the Media Access Control (MAC) frame. The MAC frame format can include a MAC header, frame body, and frame check sequence (FCS).

[0058] AMP devices

[0059] With the development of wireless communication technology, there is a growing desire to integrate wireless communication systems with various vertical industries such as logistics, manufacturing, transportation, and energy. For example, wireless communication systems can be integrated with industrial wireless sensor networks (IWSNs). They can also be integrated with smart logistics and smart warehousing. Furthermore, they can be integrated with smart home networks.

[0060] However, in these industries, communication equipment typically needs to be characterized by low cost, small size (e.g., ultra-thin), maintenance-free operation, and long lifespan. Therefore, to meet these requirements, zero-power communication technology can be used. In this scenario, the STA 120 mentioned earlier can be referred to as a "zero-power device" or "AMP device."

[0061] The following section, in conjunction with Figure 2, introduces zero-power communication technology and AMP devices.

[0062] As shown in Figure 2, the AMP device 210 supporting zero-power communication technology may include an energy harvesting module 211 and a backscatter communication module 212. In some cases, the AMP device 210 may also include a low-power computing module 213. The low-power computing module 213 can be used to provide computing functions for the AMP device 210, such as data processing. In other cases, the AMP device 210 may also include a sensor 214 for collecting external information (e.g., ambient temperature, ambient humidity, etc.). In still other cases, the AMP device 210 may also include a memory 215 for storing information (e.g., external information collected by the aforementioned sensors, or object identification, etc.).

[0063] The aforementioned energy harvesting module 211 is used to harvest energy. In some implementations, energy can be harvested from power supply signals sent by other devices or from the external environment. The power supply signal can be a "radio frequency signal" sent by a network device; therefore, the aforementioned energy harvesting module can be a "radio frequency energy harvesting module." The energy harvesting module can be used to harvest any type of signal in the environment. For example, the energy harvesting module can be used to harvest power supply signals sent by other devices or energy from the environment. This application does not specifically limit the form of the power supply signal. For example, the power supply signal can be a modulated wireless signal or an unmodulated wireless signal, such as a carrier signal. Furthermore, the power supply signal can also be a wireless signal of any waveform, such as a sine wave or a square wave.

[0064] In some implementations, the AMP device 210 may also include a logic processing unit to perform corresponding computational functions.

[0065] Figure 3 illustrates one possible structure of the energy harvesting module 211. As shown in Figure 3, the energy harvesting module 211 can harvest the energy of spatial electromagnetic waves from radio frequency signals based on the principle of electromagnetic induction, and store the harvested energy in capacitor C, which is the charging process of capacitor C. After the charging process of capacitor C is completed, capacitor C can begin to discharge to power the AMP device. For example, the discharge of capacitor C can be used to drive the AMP device to perform low-power demodulation of data transmitted by other devices. Alternatively, the discharge of capacitor C can be used to drive the AMP device to modulate the data to be transmitted. Another example is that the discharge of capacitor C can be used to drive the sensors of the AMP device to acquire data. Yet another example is that the discharge of capacitor C can be used to drive the AMP device to read data from memory 215, etc.

[0066] The principle of backscatter communication is explained below with reference to Figure 4. Referring to Figure 4, the AMP device 210 receives a wireless signal sent by another device and modulates the signal to load the data to be transmitted. Then, the AMP device 210 radiates the modulated signal from its antenna; this information transmission process is called backscatter communication. The aforementioned wireless signal can also be called a carrier signal. A carrier signal can refer to an unmodulated wireless signal. For example, a carrier signal can be a sine wave signal. Backscatter communication and load modulation are inseparable. Load modulation can be understood as adjusting and controlling the circuit parameters of the AMP device's oscillation circuit according to the data flow rhythm, thereby changing parameters such as the impedance of the AMP device and completing the modulation process.

[0067] Channel access in Wi-Fi systems is based on Listen Before Talk (LBT) and multiple access architecture. As mentioned earlier, AMP devices have a relatively simple structure and limited power, making LBT impossible. Therefore, the Access Point (AP) can perform LBT and reserve channels for AMP devices through operations such as Transmission Opportunity (TXOP). The AMP device transmits data when it receives a trigger frame sent by the AP.

[0068] Communication via backscattering by AMP devices includes two types: downlink (DL) communication and uplink (UP) communication. As an example, as shown in Figure 5, for DL ​​communication of the AMP device, the AP sends downlink data to the AMP device, possibly with additional signaling overhead, such as synchronization signals and configuration information. For UL communication of the AMP device 210, backscattering can be used. In mono-static mode, the AP sends a carrier wave (CW) to the AMP device; in bi-static mode, the assistant node sends the CW. The AMP device performs additional modulation and coding on the received CW before backscattering it back to the AP. The DL and UL communication shown in Figure 5 are separate. After receiving downlink data from the AP, the AP needs to perform processes such as LBT (Low-to-Browser) to reserve a channel for the UL communication of the AMP device. The LBT process consumes a considerable amount of time.

[0069] Therefore, in this embodiment of the application, the AMP device can perform bidirectional communication, that is, UL communication immediately follows DL communication. In this way, there is no need to compete for the channel for UL communication, thereby improving data transmission efficiency.

[0070] However, this approach still incurs significant signaling overhead. AMP devices, due to their relatively simple structure and limited power, typically support lower data rates. While this is sufficient for typical AMP applications where the payload to be transmitted is usually small, signaling overhead, such as preambles and synchronization signals, accounts for a higher proportion of the signaling overhead. This leads to longer air interface transmission times, impacting devices with higher priority access to the channel.

[0071] In view of this, this application proposes a new PPDU format that is more flexible and compact. The PPDU format may include a preamble, a downlink portion, and an uplink portion. After receiving downlink data sent by a second device based on the PPDU format, the first device can send uplink data following the downlink data without waiting for resources to send the uplink data. Furthermore, the uplink portion and the downlink portion can share the preamble, thereby saving signaling overhead and improving data transmission efficiency.

[0072] The embodiments of this application will be described in detail below with reference to Figures 6 to 16.

[0073] Figure 6 is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The method 300 shown in Figure 6 can be executed by a first device and a second device. Optionally, the first device can be a STA (Stationary Access Point) and the second device can be an AP (Access Point). Optionally, the first device can be an AMP (Active Programming AMP). The AMP can be a backscattering AMP or an active transmitting AMP.

[0074] Referring to Figure 6, in step 310, the first device receives downlink data sent by the second device.

[0075] In step 320, the first device sends uplink data to the second device.

[0076] In this process, the uplink data is transmitted following the downlink data without the need for channel contention. For example, there is no need to perform LBT or other operations on the uplink data. The first device can send the corresponding uplink data to the second device immediately after receiving the downlink data sent by the second device, thereby improving data transmission efficiency.

[0077] In this embodiment, the first device can receive downlink data sent by the second device and send uplink data to the second device based on a new PPDU format. The PPDU format includes a preamble, a downlink portion (DL portion), and an uplink portion (UL portion). The downlink portion includes the downlink data, and the uplink portion includes the uplink data. The transmission of the uplink portion follows the transmission of the downlink portion without competing for the channel. Furthermore, the uplink portion and the downlink portion share the preamble, or both are associated with the preamble, eliminating the need for a separate preamble between them. This saves signaling overhead, improves data transmission efficiency, and does not affect other traditional Wi-Fi devices.

[0078] This preamble is a traditional preamble, also known as a legal preamble. The preamble setting in this PPDU format ensures the coexistence of other traditional Wi-Fi devices, thereby allowing the bandwidth to reach the existing channel bandwidth, such as 20MHz in the 802.11n / ac protocol.

[0079] The PPDU format of this application embodiment is equivalent to a new PPDU format formed by integrating or combining the independent downlink PPDU and uplink PPDU shown in Figure 5. Since the uplink part is transmitted after the downlink part, the preamble part in the uplink PPDU that precedes the uplink part can be omitted, thereby saving signaling overhead and improving the data transmission rate.

[0080] In addition to downlink data, the downlink portion may also include a downlink synchronization signal (DL Sync), i.e., a downlink synchronization sequence, used to achieve downlink synchronization. Optionally, the downlink portion may also include downlink signaling (DL SIG), also known as a downlink configuration signal or downlink signal. This downlink signaling may carry configuration and / or scheduling information related to the downlink data, such as data transmission rate, downlink data length, parity bits, etc.

[0081] In addition to uplink data, the uplink portion may also include one or more of the following: uplink synchronization signal (UL Sync) and uplink signaling (UL SIG). This uplink signaling can also be called an uplink configuration signal or uplink signal. The uplink synchronization signal is the uplink synchronization sequence used to achieve uplink synchronization. The uplink signaling may carry configuration and / or scheduling information related to the uplink data. If the second device has not configured and / or scheduled the uplink data, the first device can notify the second device to perform the necessary configuration through uplink signaling, or the configuration and / or scheduling information for the uplink data may be explicitly or implicitly indicated through the downlink portion, as will be discussed in detail later.

[0082] In this embodiment of the application, the data may also be referred to as payload or effective payload. Accordingly, uplink data may also be referred to as uplink payload, and downlink data may also be referred to as downlink payload.

[0083] In some implementations, the PPDU format also includes a guard period (GP), which lies between the downlink and uplink portions. The GP is the transition time between the first device receiving the downlink portion and the backscattering from the uplink portion. The GP may include hardware switching time, propagation time (e.g., the time required for a signal to travel from the transmitter to the receiver), etc. The duration of the GP depends on the hardware capabilities of the first device, such as an AMP device, and is typically set in the range of a few microseconds to tens of microseconds. Optionally, multiple GP lengths can be configured, such as short and long GPs, to accommodate the capabilities of different AMP devices.

[0084] Figure 7 illustrates a possible PPDU format according to an embodiment of this application. As shown in Figure 7, this PPDU format includes a preamble, a downlink portion, a GP (GP term), and an uplink portion. After receiving the preamble and downlink portions from the second device, the first device immediately transmits the uplink portion at the interval of the GP duration. When the first device transmits the uplink portion to the second device, it does not need to transmit the preamble portion beforehand; that is, in this PPDU format, a preamble portion is not required between the downlink and uplink portions, thereby reducing signaling overhead.

[0085] Optionally, if the first device is an AMP device, the uplink portion may be transmitted to the AMP device via an auxiliary node or AP, after which the AMP device modulates and encodes the received CW and carries corresponding signaling and / or data, and then transmits it to the AP via backscattering. Alternatively, if the first device is an actively transmitting AMP device, the uplink portion may be transmitted to the AP by the AMP device in an actively transmitting manner.

[0086] The following describes in detail, with reference to Figures 8 to 10, the possible formats of the downlink and uplink portions in Figure 7.

[0087] Referring to Figure 8, the PPDU format includes a preamble, downlink portion, GP (GP for backhaul), and uplink portion. The downlink portion includes downlink synchronization signals, downlink signaling, and downlink data, while the uplink portion includes uplink synchronization signals, uplink signaling, and uplink data. The PPDU format shown in Figure 8 can also be referred to as the full format.

[0088] In some implementations, the downlink portion includes a downlink synchronization signal. The uplink portion may include an uplink synchronization signal; alternatively, the uplink portion may not include an uplink synchronization signal to save signaling overhead. In this case, the timing can be controlled by the AP or auxiliary node. Therefore, as long as downlink synchronization is achieved, uplink synchronization is assumed by default.

[0089] For example, referring to Figure 9, the PPDU format includes a preamble, a downlink portion, a GP (GP for backhaul), and an uplink portion. The downlink portion includes downlink synchronization signals, downlink signaling, and downlink data, while the uplink portion includes uplink signaling and uplink data.

[0090] In some implementations, the uplink portion may include uplink signaling; alternatively, the uplink portion may not include uplink signaling. If the uplink portion does not include uplink signaling, optionally, the downlink signaling may also carry configuration and / or scheduling information related to the uplink data; or, the downlink synchronization signal may also be used to indicate configuration and / or scheduling information related to the uplink data. As an example, the downlink synchronization information may implicitly indicate the scheduling information of the uplink data; for example, multiple synchronization sequences may be configured, each corresponding to a different transmission mode of the uplink data, thereby indicating different transmission modes of the uplink data through different synchronization sequences.

[0091] For example, referring to Figure 10, the PPDU format includes a preamble, a downlink portion, a GP (GP for backhaul), and an uplink portion. The downlink portion includes a downlink synchronization signal, downlink signaling, and downlink data, while the uplink portion includes uplink data. The downlink synchronization signal is also used to indicate configuration and / or scheduling information related to the uplink data; alternatively, the downlink signaling may also carry configuration and / or scheduling information related to the uplink data.

[0092] Since downlink signaling is optional in the downlink portion, the PPDU formats shown in Figures 8 to 10 may not include downlink signaling. Therefore, the PPDU format in this embodiment may be more compact. For example, as shown in Figure 11, the PPDU format includes a preamble, a downlink portion, a GP (GP for backhaul), and an uplink portion. The downlink portion includes a downlink synchronization signal and downlink data, while the uplink portion includes uplink data.

[0093] As mentioned earlier, GP is optional. Therefore, in some cases, the PPDU formats shown in Figures 7 to 11 may not include GP. For example, as shown in Figure 12, GP can be further omitted from Figure 11 to achieve the most compact PPDU format. As shown in Figure 12, the PPDU format includes a preamble, a downlink portion, and an uplink portion. The downlink portion includes a downlink synchronization signal and downlink data, and the uplink portion includes uplink data.

[0094] The PPDU format shown in Figures 9 to 12 can also be called a compact format. It is typically used when there are a large number of devices and the individual air interface transmission time for each device should be very short.

[0095] This application also provides an indication method in PPDU format, which is described below.

[0096] In some implementations, the format of the downlink portion is indicated by one or more of the following: the downlink synchronization signal in the downlink portion; the downlink signaling in the downlink portion.

[0097] In some implementations, the format of the uplink portion is indicated by one or more of the following: downlink synchronization signal in the downlink portion; downlink signaling in the downlink portion; downlink data in the downlink portion; uplink synchronization signal in the uplink portion; and uplink signaling in the uplink portion.

[0098] In other words, the downlink synchronization signal of this downlink portion can indicate the format of the downlink portion, the format of the uplink portion, or simultaneously the format of both the downlink and uplink portions, i.e., the format of the PPDU. Similarly, the downlink signaling of this downlink portion can carry information about the format of the downlink portion, information about the format of the uplink portion, or simultaneously the format of both the downlink and uplink portions, i.e., the format of the PPDU. Furthermore, the downlink data of this downlink portion can also carry information about the format of the uplink portion. Similarly, the uplink synchronization signal of this uplink portion can indicate the format of the uplink portion. And similarly, the uplink signaling of this uplink portion can carry information about the format of the uplink portion.

[0099] It is understood that the format of the upper part and the format of the lower part include, but are not limited to, the formats of the upper part and the lower part shown in Figures 8 to 12 above.

[0100] As a typical application scenario of this application embodiment, the uplink portion can be a feedback to the downlink portion, such as an ACK feedback, i.e., DL+UL ACK. After the second device sends downlink data to the first device, the first device needs to send an uplink ACK feedback to the second device to ensure that the first device has correctly received the downlink data. This ACK feedback can be sent along with the downlink data, and the uplink ACK feedback can be sent immediately after the downlink data is correctly received, without needing to transmit a preamble, thus shortening the overall transmission time.

[0101] In other application scenarios, such as inventory or warehouse scenarios, the second device may require the first device to report its identification (ID) information, and the second device needs to send an ACK feedback to the first device to indicate that it has correctly received the identification information. Therefore, the entire process may include DL request + UL ID + DL ACK, which involves two conversions: DL to UL and UL to DL.

[0102] Therefore, the PPDU format of this application embodiment can also be extended to include multiple downlink portions and / or multiple uplink portions, such as the PPDU format shown in FIG13. That is, in some implementations, the aforementioned downlink portion can be one of the multiple downlink portions in the PPDU format; and / or, the aforementioned uplink portion can be one of the multiple uplink portions in the PPDU format.

[0103] In some implementations, the multiple downlink portions may include downlink portions with the same format and / or downlink portions with different formats, that is, the multiple downlink portions may have the same or different formats; the multiple uplink portions may include uplink portions with the same format and / or uplink portions with different formats, that is, the multiple uplink portions may have the same or different formats.

[0104] In some implementations, a General Point (GP) is set between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

[0105] In some implementations, the GP information between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or by downlink signaling in the downlink section.

[0106] First, describe the cases where multiple downlink sections in the PPDU format have the same and different formats.

[0107] When multiple downlink sections share the same format, each downlink section can be in any of the aforementioned formats, such as including a downlink synchronization signal and downlink data, or including a downlink synchronization signal, downlink signaling, and downlink data. The format of each downlink section can also be indicated by any of the aforementioned methods, such as through the downlink synchronization signal within the downlink section, or by carrying information about the downlink section's format in the downlink signaling.

[0108] In cases where multiple downlink sections have different formats, in some implementations, the first downlink section includes a downlink synchronization signal; the downlink sections following the first downlink section do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

[0109] For the first downlink portion of the transmission, i.e., the first downlink portion after the preamble, the first device needs to perform downlink synchronization, so it needs to include a downlink synchronization signal. However, if downlink synchronization can be maintained, the downlink synchronization signal can be selectively deleted in subsequent downlink portions. If downlink synchronization is lost during this process, the second device can re-insert the downlink synchronization signal in the downlink portion at the point where the downlink synchronization was lost.

[0110] In other implementations, the first downlink portion of a plurality of downlink portions includes downlink signaling used to indicate the format of the downlink portion and / or the format of the uplink portion; subsequent downlink portions of a plurality of downlink portions do not include downlink signaling, or downlink signaling is reinserted if the format of the downlink portion and / or the format of the uplink portion changes.

[0111] For the first downlink portion of a transmission, if downlink signaling is required to indicate the format—for example, the format of the downlink portion, the format of the uplink portion, or the format of the corresponding downlink portion and subsequent uplink portions—then the first downlink portion may include downlink signaling. Taking the downlink signaling of the first downlink portion indicating its format as an example, if subsequent downlink portions have the same format, the downlink signaling can be selectively deleted from subsequent downlink portions to avoid repetition and save signaling overhead. If the format of a downlink portion changes during the interaction, the second device can re-insert downlink signaling in that downlink portion to indicate the new format. It should be noted that this applies to cases where the downlink signaling does not include other information such as downlink data configuration and / or scheduling information, or where the downlink signaling includes configuration and / or scheduling information, but the configuration and / or scheduling information is also the same. Otherwise, the downlink signaling cannot be deleted, or only the format-related content can be deleted.

[0112] Secondly, it describes the cases where multiple upstream sections in the PPDU format have the same and different formats.

[0113] When multiple uplink segments have the same format, the format of each uplink segment can be any of the aforementioned formats, such as including uplink synchronization signals, uplink signaling, and uplink data, or including uplink signaling and uplink data, or including uplink synchronization signals and uplink data, or including only uplink data. The format of each uplink segment can also be indicated by any of the aforementioned indication methods, for example, by indicating it through downlink synchronization signals in the downlink segment, or by carrying uplink segment format information in downlink signaling, or by carrying uplink segment format information in downlink data, or by indicating uplink segment format information through uplink synchronization signals, or by carrying uplink segment format information in uplink signaling.

[0114] In cases where multiple uplink segments have different formats, in some implementations, the first uplink segment includes uplink signaling to indicate the format of the uplink segment; subsequent uplink segments do not include uplink signaling, or uplink signaling is reinserted if the format of the uplink segment changes.

[0115] For the first uplink portion of the transmission, if uplink signaling is required to indicate the format of the uplink portion, the first uplink portion can include uplink signaling. If the format of subsequent uplink portions is the same, the uplink signaling can be selectively deleted in subsequent uplink portions to avoid repetitive indication and save signaling overhead. Once the format of an uplink portion changes during the interaction, the second device can re-insert uplink signaling in that uplink portion to indicate the new format. It should be noted that this applies to cases where the uplink signaling does not include other information such as uplink data configuration and / or scheduling information, or cases where the uplink signaling includes configuration and / or scheduling information, but the configuration and / or scheduling information is also the same; otherwise, the uplink signaling cannot be deleted, or only the format-related content can be deleted.

[0116] In this embodiment of the application, the PPDU format can be indicated in the following two ways.

[0117] In one implementation, the PPDU format can be indicated by certain parts of the PPDU, such as the first downlink portion. That is, the format of the entire PPDU is indicated by the first downlink portion. For example, the PPDU format can be indicated by one or more of the following: the downlink synchronization signal of the first downlink portion; the downlink signaling of the first downlink portion; or the downlink data of the first downlink portion. This method can be called a single indication or a one-time indication.

[0118] In other words, the format of the entire PPDU can be indicated through the first downlink portion, for example, as shown in Figure 14, through the downlink synchronization signal, downlink signaling, or downlink data in the first downlink portion. In this way, the first and second devices can know the PPDU format used in the entire interaction process from the beginning.

[0119] In another implementation, the format of the N consecutive uplinks and downlinks following each downlink is indicated by the downlink; and / or, the format of the N consecutive downlinks and uplinks following each uplink is indicated by the uplink; where N is a positive integer. This approach can be called progressive indication.

[0120] For example, as shown in Figure 15, assuming N=1, the first downlink portion is used to indicate the format of the first uplink portion, for example, by using the downlink synchronization signal, downlink signaling, or downlink data of the first downlink portion to indicate the format of the first uplink portion; the first uplink portion is used to indicate the format of the second downlink portion, for example, by using the uplink synchronization signal or uplink signaling of the first uplink portion to indicate the format of the second downlink portion; the second downlink portion is used to indicate the format of the second uplink portion, for example, by using the downlink synchronization signal, downlink signaling, or downlink data of the second downlink portion to indicate the format of the second uplink portion; and so on.

[0121] For example, assuming N=2, the first downlink portion is used to indicate the format of the first uplink portion and the second downlink portion; the second downlink portion is used to indicate the format of the second uplink portion and the third downlink portion; and so on.

[0122] For progressive indication, it is necessary to know the end time of the PPDU format. The end of the PPDU format can be indicated implicitly or explicitly.

[0123] In one implementation, the PPDU format is based on an indication message that is carried in the uplink signaling of the uplink portion, or in the downlink signaling of the downlink portion, or the indication message can be other special signaling in the downlink portion.

[0124] In another implementation, the PPDU format ends when neither the uplink nor downlink portion indicates its format. That is, if an uplink or downlink portion does not indicate the format of subsequent uplink or downlink portions, it signifies the end of the current uplink or downlink portion for that PPDU format, thus ending the interaction between the first and second devices.

[0125] In some scenarios, such as when cost-effective and maintenance-free AMP devices are required, the technical solutions of the embodiments of this application can be used. For example, for an AMP tag-based communication system, the PPDU format shown in Figure 16 can be used for interaction between the AMP tag and the AP. The AP requests the AMP tag to report its ID, the AMP tag reports its ID to the AP, and the AP sends an ACK feedback to the AMP tag to indicate that it has correctly received the ID. This process includes DL request + UL ID + DL ACK. Such AMP devices represent a huge market in many scenarios such as smart homes, smart manufacturing, and logistics / warehousing. The groups involved may include AMP IoT device suppliers, companies operating large shopping malls, warehouse / logistics companies, smart home service providers, etc.

[0126] Because the PPDU format provided in this application is more flexible and efficient, it can reduce the overall interaction time between the AMP device and the AP, improve the data transmission speed, and reduce the impact on traditional Wi-Fi devices.

[0127] The method embodiments of this application have been described in detail above with reference to Figures 1 to 16. The apparatus embodiments of this application will be described in detail below with reference to Figures 17 to 19. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0128] Figure 17 is a schematic diagram of the structure of a communication device provided in an embodiment of this application. The communication device 400 shown in Figure 17 can be the first device mentioned above, which includes a transceiver unit 410. The transceiver unit 410 is used to receive downlink data sent by a second device and send uplink data to the second device based on the PPDU format; wherein, the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0129] In some implementations, the PPDU format further includes a guard time (GP), which is located between the downlink portion and the uplink portion.

[0130] In some implementations, the downlink portion may include a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

[0131] In some implementations, the downlink synchronization signal is also used to indicate configuration and / or scheduling information for the uplink data.

[0132] In some implementations, the downlink portion further includes downlink signaling, which carries configuration and / or scheduling information related to the downlink data.

[0133] In some implementations, the uplink portion further includes uplink signaling, which carries configuration and / or scheduling information related to the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information related to the uplink data.

[0134] In some implementations, the format of the downlink portion is indicated by one or more of the following: a downlink synchronization signal in the downlink portion; or a downlink signaling in the downlink portion.

[0135] In some implementations, the format of the uplink portion is indicated by one or more of the following: downlink synchronization signal in the downlink portion; downlink signaling in the downlink portion; downlink data in the downlink portion; uplink synchronization signal in the uplink portion; and uplink signaling in the uplink portion.

[0136] In some implementations, the downlink portion is one of a plurality of downlink portions in the PPDU format; and / or, the uplink portion is one of a plurality of uplink portions in the PPDU format.

[0137] In some implementations, the plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

[0138] In some implementations, the first downlink portion of the plurality of downlink portions includes a downlink synchronization signal; the downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

[0139] In some implementations, the first downlink portion of the plurality of downlink portions includes downlink signaling used to indicate the format of the downlink portion and / or the format of the uplink portion; subsequent downlink portions of the plurality of downlink portions do not include downlink signaling, or downlink signaling is reinserted if the format of the downlink portion and / or the format of the uplink portion changes.

[0140] In some implementations, the plurality of uplink portions includes uplink portions with the same format and / or uplink portions with different formats.

[0141] In some implementations, the first uplink portion of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; subsequent uplink portions of the plurality of uplink portions do not include uplink signaling, or uplink signaling is reinserted if the format of the uplink portion changes.

[0142] In some implementations, a General Point (GP) is set between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

[0143] In some implementations, the GP information between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

[0144] In some implementations, the PPDU format is indicated by one or more of the following: a downlink synchronization signal of the first downlink portion of the plurality of downlink portions; downlink signaling of the first downlink portion of the plurality of downlink portions; or downlink data of the first downlink portion of the plurality of downlink portions.

[0145] In some implementations, the format of the N consecutive uplink and downlink portions following the downlink portion is indicated by the downlink portion; and / or, the format of the N consecutive downlink and uplink portions following the uplink portion is indicated by the uplink portion; where N is a positive integer.

[0146] In some implementations, the PPDU format ends based on an indication message carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

[0147] In some implementations, the PPDU format ends without any indication of its uplink or downlink portion.

[0148] In some implementations, the first device is a site STA and the second device is an access point AP.

[0149] In some implementations, the first device is an AMP device.

[0150] In some implementations, the uplink portion is transmitted via backscatter, with the carrier CW used for backscatter being sent by the AP or an auxiliary node.

[0151] In some implementations, the uplink portion is transmitted via active transmission.

[0152] It is understood that the transceiver unit 410 may be, for example, a transceiver 630. Additionally, the communication device 400 may optionally include a processor 610 and a memory 620, as detailed in Figure 19.

[0153] Figure 18 is a schematic diagram of the structure of a communication device provided in another embodiment of this application. The communication device 500 shown in Figure 18 can be the second device mentioned above, which includes a transceiver unit 510. The transceiver unit 510 is used to send downlink data to a first device and receive uplink data sent by the first device based on the PPDU format; wherein, the PPDU format includes a preamble portion, a downlink portion, and an uplink portion, the downlink portion including the downlink data, and the uplink portion including the uplink data.

[0154] In some implementations, the PPDU format further includes a guard time (GP), which is located between the downlink portion and the uplink portion.

[0155] In some implementations, the downlink portion may include a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

[0156] In some implementations, the downlink synchronization signal is also used to indicate configuration and / or scheduling information for the uplink data.

[0157] In some implementations, the downlink portion further includes downlink signaling, which carries configuration and / or scheduling information related to the downlink data.

[0158] In some implementations, the uplink portion further includes uplink signaling, which carries configuration and / or scheduling information related to the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information related to the uplink data.

[0159] In some implementations, the format of the downlink portion is indicated by one or more of the following: a downlink synchronization signal in the downlink portion; or a downlink signaling in the downlink portion.

[0160] In some implementations, the format of the uplink portion is indicated by one or more of the following: downlink synchronization signal in the downlink portion; downlink signaling in the downlink portion; downlink data in the downlink portion; uplink synchronization signal in the uplink portion; and uplink signaling in the uplink portion.

[0161] In some implementations, the downlink portion is one of a plurality of downlink portions in the PPDU format; and / or, the uplink portion is one of a plurality of uplink portions in the PPDU format.

[0162] In some implementations, the plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

[0163] In some implementations, the first downlink portion of the plurality of downlink portions includes a downlink synchronization signal; the downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

[0164] In some implementations, the first downlink portion of the plurality of downlink portions includes downlink signaling used to indicate the format of the downlink portion and / or the format of the uplink portion; subsequent downlink portions of the plurality of downlink portions do not include downlink signaling, or downlink signaling is reinserted if the format of the downlink portion and / or the format of the uplink portion changes.

[0165] In some implementations, the plurality of uplink portions includes uplink portions with the same format and / or uplink portions with different formats.

[0166] In some implementations, the first uplink portion of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; subsequent uplink portions of the plurality of uplink portions do not include uplink signaling, or uplink signaling is reinserted if the format of the uplink portion changes.

[0167] In some implementations, a General Point (GP) is set between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

[0168] In some implementations, the GP information between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

[0169] In some implementations, the PPDU format is indicated by one or more of the following: a downlink synchronization signal of the first downlink portion of the plurality of downlink portions; downlink signaling of the first downlink portion of the plurality of downlink portions; or downlink data of the first downlink portion of the plurality of downlink portions.

[0170] In some implementations, the format of the N consecutive uplink and downlink portions following the downlink portion is indicated by the downlink portion; and / or, the format of the N consecutive downlink and uplink portions following the uplink portion is indicated by the uplink portion; where N is a positive integer.

[0171] In some implementations, the PPDU format ends based on an indication message carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

[0172] In some implementations, the PPDU format ends without any indication of its uplink or downlink portion.

[0173] In some implementations, the first device is a site STA and the second device is an access point AP.

[0174] In some implementations, the first device is an AMP device.

[0175] In some implementations, the uplink portion is transmitted via backscatter, with the carrier CW used for backscatter being sent by the AP or an auxiliary node.

[0176] In some implementations, the uplink portion is transmitted via active transmission.

[0177] It is understood that the transceiver unit 510 may be, for example, a transceiver 630. Additionally, the communication device 500 may optionally include a processor 610 and a memory 620, as detailed in Figure 19.

[0178] Figure 19 is a schematic structural diagram of a communication device applicable to embodiments of this application. The dashed lines in Figure 19 indicate that the unit or module is optional. Device 600 can be used to implement method 300 as described in the above method embodiments. Device 600 can be a chip, a first device, or a second device.

[0179] Apparatus 600 may include one or more processors 610. The processor 610 may support apparatus 600 in implementing the methods described in the preceding method embodiments. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0180] The apparatus 600 may further include one or more memories 620. The memories 620 store a program that can be executed by the processor 610, causing the processor 610 to perform the methods described in the preceding method embodiments. The memories 620 may be independent of the processor 610 or integrated within the processor 610.

[0181] The device 600 may also include a transceiver 630. The processor 610 can communicate with other devices or chips via the transceiver 630. For example, the processor 610 can send and receive data with other devices or chips via the transceiver 630.

[0182] This application also provides a communication system. The system includes the first device and the second device described above. In some implementations, the system further includes other devices that interact with the first device and the second device.

[0183] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to the first or second device provided in this application, and the program causes a computer to perform the methods executed by the first or second device in various embodiments of this application.

[0184] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the first device or the second device provided in the embodiments of this application, and the program causes a computer to perform the methods executed by the first device or the second device in the various embodiments of this application.

[0185] This application also provides a computer program. This computer program can be applied to the first or second device provided in this application, and causes the computer to perform the methods executed by the first or second device in various embodiments of this application.

[0186] It should be understood that the terms "system" and "network" in the embodiments of this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of this application and is not intended to limit this application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0187] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0188] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0189] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0190] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0191] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0192] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0193] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0194] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0195] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0196] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0197] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially 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 this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0198] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, characterized in that, The method includes: The first device receives downlink data sent by the second device and sends uplink data to the second device based on the Physical Layer Protocol Data Unit (PPDU) format. The PPDU format includes a preamble, a downlink portion, and an uplink portion. The downlink portion includes the downlink data, and the uplink portion includes the uplink data.

2. The method according to claim 1, characterized in that, The PPDU format also includes a guard time (GP), which is located between the downlink portion and the uplink portion.

3. The method according to claim 1 or 2, characterized in that, The downlink portion also includes a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

4. The method according to claim 3, characterized in that, The downlink synchronization signal is also used to indicate the configuration and / or scheduling information of the uplink data.

5. The method according to any one of claims 1 to 4, characterized in that, The downlink portion also includes downlink signaling, which carries configuration and / or scheduling information related to the downlink data.

6. The method according to claim 5, characterized in that, The uplink portion further includes uplink signaling, which carries configuration and / or scheduling information related to the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information related to the uplink data.

7. The method according to any one of claims 1 to 6, characterized in that, The format of the downlink portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion.

8. The method according to any one of claims 1 to 7, characterized in that, The format of the upper portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion; Downlink data in the downlink section; The uplink synchronization signal in the uplink section; Uplink signaling in the uplink portion.

9. The method according to any one of claims 1 to 8, characterized in that, The downlink portion is one of multiple downlink portions in the PPDU format; and / or, The uplink portion is one of multiple uplink portions in the PPDU format.

10. The method according to claim 9, characterized in that, The plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

11. The method according to claim 10, characterized in that, The first of the plurality of downlink sections includes a downlink synchronization signal; The downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

12. The method according to claim 10 or 11, characterized in that, The first of the plurality of downlink portions includes downlink signaling, which is used to indicate the format of the downlink portion and / or the format of the uplink portion; Downlink segments following the first downlink segment in the plurality of downlink segments do not include downlink signaling, or downlink signaling is re-inserted if the format of the downlink segment and / or the format of the uplink segment changes.

13. The method according to any one of claims 9 to 12, characterized in that, The plurality of uplink segments include uplink segments with the same format and / or uplink segments with different formats.

14. The method according to claim 13, characterized in that, The first of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; The uplink portions following the first uplink portion of the plurality of uplink portions do not include uplink signaling, or uplink signaling is re-inserted if the format of the uplink portion changes.

15. The method according to any one of claims 9 to 14, characterized in that, A GP is provided between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

16. The method according to claim 15, characterized in that, Information about GPs between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

17. The method according to any one of claims 9 to 16, characterized in that, The PPDU format is indicated by one or more of the following: The downlink synchronization signal of the first downlink section in the plurality of downlink sections; Downlink signaling of the first downlink portion of the plurality of downlink portions; Downlink data of the first downlink portion among the plurality of downlink portions.

18. The method according to any one of claims 9 to 16, characterized in that, The format of the N consecutive uplink and downlink segments following the downlink segment is indicated by the downlink segment; and / or, the format of the N consecutive downlink and uplink segments following the uplink segment is indicated by the uplink segment; where N is a positive integer.

19. The method according to claim 18, characterized in that, The PPDU format ends based on an indication message, which is carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

20. The method according to claim 18, characterized in that, The PPDU format ends without any indication in the uplink or downlink sections.

21. The method according to any one of claims 1 to 20, characterized in that, The first device is a site STA, and the second device is an access point AP.

22. The method according to any one of claims 1 to 21, characterized in that, The first device is an environmental power supply (AMP) device.

23. The method according to claim 22, characterized in that, The uplink portion is transmitted in a backscatter manner, and the carrier CW used for backscatter is sent by the AP or auxiliary node.

24. The method according to claim 22, characterized in that, The uplink portion is transmitted via active transmission.

25. A wireless communication method, characterized in that, The method includes: The second device sends downlink data to the first device and receives uplink data sent by the first device based on the Physical Layer Protocol Data Unit (PPDU) format. The PPDU format includes a preamble, a downlink portion, and an uplink portion. The downlink portion includes the downlink data, and the uplink portion includes the uplink data.

26. The method according to claim 25, characterized in that, The PPDU format also includes a guard time (GP), which is located between the downlink portion and the uplink portion.

27. The method according to claim 25 or 26, characterized in that, The downlink portion also includes a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

28. The method according to claim 27, characterized in that, The downlink synchronization signal is also used to indicate the configuration and / or scheduling information of the uplink data.

29. The method according to any one of claims 25 to 28, characterized in that, The downlink portion also includes downlink signaling, which carries configuration and / or scheduling information for the downlink data.

30. The method according to claim 29, characterized in that, The uplink portion further includes uplink signaling, which carries configuration and / or scheduling information of the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information of the uplink data.

31. The method according to any one of claims 25 to 30, characterized in that, The format of the downlink portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion.

32. The method according to any one of claims 25 to 31, characterized in that, The format of the upper portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion; Downlink data in the downlink section; The uplink synchronization signal in the uplink section; Uplink signaling in the uplink portion.

33. The method according to any one of claims 25 to 32, characterized in that, The downlink portion is one of multiple downlink portions in the PPDU format; and / or, The uplink portion is one of multiple uplink portions in the PPDU format.

34. The method according to claim 33, characterized in that, The plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

35. The method according to claim 34, characterized in that, The first of the plurality of downlink sections includes a downlink synchronization signal; The downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

36. The method according to claim 34 or 35, characterized in that, The first of the plurality of downlink portions includes downlink signaling, which is used to indicate the format of the downlink portion and / or the format of the uplink portion; Downlink segments following the first downlink segment in the plurality of downlink segments do not include downlink signaling, or downlink signaling is re-inserted if the format of the downlink segment and / or the format of the uplink segment changes.

37. The method according to any one of claims 33 to 36, characterized in that, The plurality of uplink segments include uplink segments with the same format and / or uplink segments with different formats.

38. The method according to claim 37, characterized in that, The first of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; The uplink portions following the first uplink portion of the plurality of uplink portions do not include uplink signaling, or uplink signaling is re-inserted if the format of the uplink portion changes.

39. The method according to any one of claims 33 to 38, characterized in that, A GP is provided between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

40. The method according to claim 39, characterized in that, Information about GPs between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

41. The method according to any one of claims 33 to 40, characterized in that, The PPDU format is indicated by one or more of the following: The downlink synchronization signal of the first downlink section in the plurality of downlink sections; Downlink signaling of the first downlink portion of the plurality of downlink portions; Downlink data of the first downlink portion among the plurality of downlink portions.

42. The method according to any one of claims 33 to 40, characterized in that, The format of the N consecutive uplink and downlink segments following the downlink segment is indicated by the downlink segment; and / or, the format of the N consecutive downlink and uplink segments following the uplink segment is indicated by the uplink segment; where N is a positive integer.

43. The method according to claim 42, characterized in that, The PPDU format ends based on an indication message, which is carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

44. The method according to claim 42, characterized in that, The PPDU format ends without any indication in the uplink or downlink sections.

45. The method according to any one of claims 25 to 44, characterized in that, The first device is a site STA, and the second device is an access point AP.

46. ​​The method according to any one of claims 25 to 45, characterized in that, The first device is an environmental power supply (AMP) device.

47. The method according to claim 46, characterized in that, The uplink portion is transmitted in a backscatter manner, and the carrier CW used for backscatter is sent by the AP or auxiliary node.

48. The method according to claim 46, characterized in that, The uplink portion is transmitted via active transmission.

49. A communication device, characterized in that, The communication device is a first device, comprising: The transceiver unit is used to receive downlink data sent by the second device and send uplink data to the second device based on the Physical Layer Protocol Data Unit (PPDU) format. The PPDU format includes a preamble, a downlink portion, and an uplink portion. The downlink portion includes the downlink data, and the uplink portion includes the uplink data.

50. The communication device according to claim 49, characterized in that, The PPDU format also includes a guard time (GP), which is located between the downlink portion and the uplink portion.

51. The communication device according to claim 49 or 50, characterized in that, The downlink portion also includes a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

52. The communication device according to claim 51, characterized in that, The downlink synchronization signal is also used to indicate the configuration and / or scheduling information of the uplink data.

53. The communication device according to any one of claims 49 to 52, characterized in that, The downlink portion also includes downlink signaling, which carries configuration and / or scheduling information related to the downlink data.

54. The communication device according to claim 53, characterized in that, The uplink portion further includes uplink signaling, which carries configuration and / or scheduling information related to the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information related to the uplink data.

55. The communication device according to any one of claims 49 to 54, characterized in that, The format of the downlink portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion.

56. The communication device according to any one of claims 49 to 55, characterized in that, The format of the upper portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion; Downlink data in the downlink section; The uplink synchronization signal in the uplink section; Uplink signaling in the uplink portion.

57. The communication device according to any one of claims 49 to 56, characterized in that, The downlink portion is one of multiple downlink portions in the PPDU format; and / or, The uplink portion is one of multiple uplink portions in the PPDU format.

58. The communication device according to claim 57, characterized in that, The plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

59. The communication device according to claim 58, characterized in that, The first of the plurality of downlink sections includes a downlink synchronization signal; The downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

60. The communication device according to claim 58 or 59, characterized in that, The first of the plurality of downlink portions includes downlink signaling, which is used to indicate the format of the downlink portion and / or the format of the uplink portion; Downlink segments following the first downlink segment in the plurality of downlink segments do not include downlink signaling, or downlink signaling is re-inserted if the format of the downlink segment and / or the format of the uplink segment changes.

61. The communication device according to any one of claims 57 to 60, characterized in that, The plurality of uplink segments include uplink segments with the same format and / or uplink segments with different formats.

62. The communication device according to claim 61, characterized in that, The first of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; The uplink portions following the first uplink portion of the plurality of uplink portions do not include uplink signaling, or uplink signaling is re-inserted if the format of the uplink portion changes.

63. The communication device according to any one of claims 57 to 62, characterized in that, A GP is provided between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

64. The communication device according to claim 63, characterized in that, Information about GPs between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

65. The communication device according to any one of claims 57 to 64, characterized in that, The PPDU format is indicated by one or more of the following: The downlink synchronization signal of the first downlink section in the plurality of downlink sections; Downlink signaling of the first downlink portion of the plurality of downlink portions; Downlink data of the first downlink portion among the plurality of downlink portions.

66. The communication device according to any one of claims 57 to 64, characterized in that, The format of the N consecutive uplink and downlink segments following the downlink segment is indicated by the downlink segment; and / or, the format of the N consecutive downlink and uplink segments following the uplink segment is indicated by the uplink segment; where N is a positive integer.

67. The communication device according to claim 66, characterized in that, The PPDU format ends based on an indication message, which is carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

68. The communication device according to claim 66, characterized in that, The PPDU format ends without any indication in the uplink or downlink sections.

69. The communication device according to any one of claims 49 to 68, characterized in that, The first device is a site STA, and the second device is an access point AP.

70. The communication device according to any one of claims 49 to 69, characterized in that, The first device is an environmental power supply (AMP) device.

71. The communication device according to claim 70, characterized in that, The uplink portion is transmitted in a backscatter manner, and the carrier CW used for backscatter is sent by the AP or auxiliary node.

72. The communication device according to claim 70, characterized in that, The uplink portion is transmitted via active transmission.

73. A communication device, characterized in that, The communication device is a second device, including: The transceiver unit is used to send downlink data to the first device and receive uplink data sent by the first device based on the Physical Layer Protocol Data Unit (PPDU) format. The PPDU format includes a preamble, a downlink portion, and an uplink portion. The downlink portion includes the downlink data, and the uplink portion includes the uplink data.

74. The communication device according to claim 73, characterized in that, The PPDU format also includes a guard time (GP), which is located between the downlink portion and the uplink portion.

75. The communication device according to claim 73 or 74, characterized in that, The downlink portion also includes a downlink synchronization signal, and the uplink portion may include an uplink synchronization signal or may not include an uplink synchronization signal.

76. The communication device according to claim 75, characterized in that, The downlink synchronization signal is also used to indicate the configuration and / or scheduling information of the uplink data.

77. The communication device according to any one of claims 73 to 76, characterized in that, The downlink portion also includes downlink signaling, which carries configuration and / or scheduling information for the downlink data.

78. The communication device according to claim 77, characterized in that, The uplink portion further includes uplink signaling, which carries configuration and / or scheduling information of the uplink data; or, the uplink portion does not include the uplink signaling, and the downlink signaling also carries configuration and / or scheduling information of the uplink data.

79. The communication device according to any one of claims 73 to 78, characterized in that, The format of the downlink portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion.

80. The communication device according to any one of claims 73 to 79, characterized in that, The format of the upper portion is indicated by one or more of the following: The downlink synchronization signal in the downlink section; Downlink signaling in the downlink portion; Downlink data in the downlink section; The uplink synchronization signal in the uplink section; Uplink signaling in the uplink portion.

81. The communication device according to any one of claims 73 to 80, characterized in that, The downlink portion is one of multiple downlink portions in the PPDU format; and / or, The uplink portion is one of multiple uplink portions in the PPDU format.

82. The communication device according to claim 81, characterized in that, The plurality of downlink portions includes downlink portions with the same format and / or downlink portions with different formats.

83. The communication device according to claim 82, characterized in that, The first of the plurality of downlink sections includes a downlink synchronization signal; The downlink portions following the first downlink portion of the plurality of downlink portions do not include a downlink synchronization signal, or a downlink synchronization signal is re-inserted in the event of synchronization loss.

84. The communication device according to claim 82 or 83, characterized in that, The first of the plurality of downlink portions includes downlink signaling, which is used to indicate the format of the downlink portion and / or the format of the uplink portion; Downlink segments following the first downlink segment in the plurality of downlink segments do not include downlink signaling, or downlink signaling is re-inserted if the format of the downlink segment and / or the format of the uplink segment changes.

85. The communication device according to any one of claims 81 to 84, characterized in that, The plurality of uplink segments include uplink segments with the same format and / or uplink segments with different formats.

86. The communication device according to claim 85, characterized in that, The first of the plurality of uplink portions includes uplink signaling used to indicate the format of the uplink portion; The uplink portions following the first uplink portion of the plurality of uplink portions do not include uplink signaling, or uplink signaling is re-inserted if the format of the uplink portion changes.

87. The communication device according to any one of claims 81 to 86, characterized in that, A GP is provided between adjacent uplink and downlink segments, and the GPs between each pair of adjacent uplink and downlink segments may be the same or different.

88. The communication device according to claim 87, characterized in that, Information about GPs between adjacent uplink and downlink sections is indicated by uplink signaling in the uplink section or downlink signaling in the downlink section.

89. The communication device according to any one of claims 81 to 88, characterized in that, The PPDU format is indicated by one or more of the following: The downlink synchronization signal of the first downlink section in the plurality of downlink sections; Downlink signaling of the first downlink portion of the plurality of downlink portions; Downlink data of the first downlink portion among the plurality of downlink portions.

90. The communication device according to any one of claims 81 to 89, characterized in that, The format of the N consecutive uplink and downlink segments following the downlink segment is indicated by the downlink segment; and / or, the format of the N consecutive downlink and uplink segments following the uplink segment is indicated by the uplink segment; where N is a positive integer.

91. The communication device according to claim 90, characterized in that, The PPDU format ends based on an indication message, which is carried in the uplink signaling of the uplink portion or in the downlink signaling of the downlink portion.

92. The communication device according to claim 91, characterized in that, The PPDU format ends without any indication in the uplink or downlink sections.

93. The communication device according to any one of claims 73 to 92, characterized in that, The first device is a site STA, and the second device is an access point AP.

94. The communication device according to any one of claims 73 to 93, characterized in that, The first device is an environmental power supply (AMP) device.

95. The communication device according to any one of claims 73 to 94, characterized in that, The uplink portion is transmitted in a backscatter manner, and the carrier CW used for backscatter is sent by the AP or auxiliary node.

96. The communication device according to any one of claims 73 to 95, characterized in that, The uplink portion is transmitted via active transmission.

97. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method according to any one of claims 1 to 24.

98. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method according to any one of claims 25 to 48.

99. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 48.

100. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 48.

101. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 48.

102. A computer program product, characterized in that, Includes a program that causes a computer to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 48.

103. A computer program, characterized in that, The computer program causes the computer to perform the method according to any one of claims 1 to 24, or the method according to any one of claims 25 to 48.

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