Wireless communication methods and communication devices

Abstract

Provided are wireless communication methods and communication devices. A wireless communication method comprises: a first device sends a first signal on a first time domain resource in a first shared transmission opportunity; or, the first device executes channel access on the first time domain resource in the first shared transmission opportunity. The channel access is used for a second device to execute uplink transmission on a second shared transmission opportunity, and the second shared transmission opportunity comprises time domain resources following the first time domain resource in the first shared transmission opportunity; the first time domain resource is used for the second device to execute uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

Description

Method and communication device for wireless communication TECHNICAL FIELD

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

[0002] Some communication devices (e.g., ambient powered (AMP) devices) can perform uplink transmission based on a shared transmission opportunity. If a time domain resource in the shared transmission opportunity is not selected and used by the communication device, the shared transmission opportunity can be occupied by other devices, which can affect subsequent transmission of the communication device.

[0003] SUMMARY

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

[0005] In a first aspect, a method for wireless communication is provided, comprising: sending, by a first device, a first signal on a first time domain resource in a first shared transmission opportunity; or performing, by the first device, channel access on the first time domain resource in the first shared transmission opportunity, the channel access being for a second device to perform uplink transmission on a second shared transmission opportunity, the second shared transmission opportunity comprising time domain resources in the first shared transmission opportunity after the first time domain resource; wherein the first time domain resource is for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

[0006] In a second aspect, a method for wireless communication is provided, comprising: performing, by a second device, uplink transmission on a first channel based on a first shared transmission opportunity, the first channel being occupied by a first signal sent by a first device on a first time domain resource in the first shared transmission opportunity; or performing, by the second device, uplink transmission on a first channel based on a second shared transmission opportunity, the first channel being accessed by the first device on a first time domain resource in the first shared transmission opportunity, the second shared transmission opportunity comprising time domain resources in the first shared transmission opportunity after the first time domain resource; wherein the first time domain resource is for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

[0007] In a third aspect, a communication device is provided, the communication device being a first device, the communication device comprising: a sending module configured to send a first signal on a first time domain resource in a first shared transmission opportunity; or a channel access module configured to perform channel access on the first time domain resource in the first shared transmission opportunity, the channel access being for a second device to perform uplink transmission on a second shared transmission opportunity, the second shared transmission opportunity comprising time domain resources after the first time domain resource in the first shared transmission opportunity; wherein the first time domain resource is for the second device to perform uplink transmission on the first shared transmission opportunity, the first device being a network device or a node controlled by the network device.

[0008] In a fourth aspect, a communication device is provided, the communication device being a second device, the communication device comprising: a first sending module configured to perform uplink transmission on a first channel based on a first shared transmission opportunity, the first channel being occupied by a first signal sent by a first device on a first time domain resource in the first shared transmission opportunity; or a second sending module configured to perform uplink transmission on the first channel based on a second shared transmission opportunity, the first channel being accessed by the first device on the first time domain resource in the first shared transmission opportunity, the second shared transmission opportunity comprising time domain resources after the first time domain resource in the first shared transmission opportunity; wherein the first time domain resource is for the second device to perform uplink transmission on the first shared transmission opportunity, the first device being a network device or a node controlled by the network device.

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

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

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

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

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

[0014] In an embodiment of the present application, the first device (i.e., a network device or a node controlled by a network device) can send a first signal on a first time domain resource. In this way, the first time domain resource can be occupied by the first signal, which is conducive to avoiding the first shared transmission opportunity to which the first time domain resource belongs from being occupied by other devices, thereby facilitating the second device to subsequently continue to perform uplink transmission based on the first shared transmission opportunity. Alternatively, the first device can perform channel access on the first time domain resource, which is conducive to the second device subsequently performing uplink transmission based on the second shared transmission opportunity obtained through the channel access. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 1 is an example of a system architecture of a wireless communication system to which embodiments of the present application are applicable.

[0016] FIG. 2 is an example of a system architecture of another wireless communication system to which embodiments of the present application are applicable.

[0017] FIG. 3 is an architecture diagram of a low-power Internet of Things based on a cellular network to which embodiments of the present application are applicable.

[0018] FIG. 4 is another architecture diagram of a low-power Internet of Things based on a cellular network to which embodiments of the present application are applicable.

[0019] FIG. 5 is a flow diagram of a method of wireless communication provided by an embodiment of the present application.

[0020] FIG. 6 is an example diagram of a first signal provided by an embodiment of the present application.

[0021] FIG. 7 is an example diagram of a format of a physical layer protocol data unit (PPDU).

[0022] FIG. 8 is an example diagram of sending a first signal provided by an embodiment of the present application.

[0023] FIG. 9 is an example diagram of sending a first signal provided by another embodiment of the present application.

[0024] FIG. 10 is an example diagram of transmitting a first signal according to another embodiment of the present application.

[0025] FIG. 11 is an example diagram of the first signal according to another embodiment of the present application.

[0026] FIG. 12 is an example diagram of the first signal according to another embodiment of the present application.

[0027] FIG. 13 is an example diagram of the first signal according to another embodiment of the present application.

[0028] FIG. 14 is an example diagram of the first signal according to another embodiment of the present application.

[0029] FIG. 15 is an example diagram of the first signal according to another embodiment of the present application.

[0030] FIG. 16 is a flow diagram of a method of wireless communication according to another embodiment of the present application.

[0031] FIG. 17 is a flow diagram of a method of wireless communication according to another embodiment of the present application.

[0032] FIG. 18 is an example diagram of a trigger frame indicating time domain resources according to an embodiment of the present application.

[0033] FIG. 19 is an example diagram of a trigger frame indicating time domain resources according to another embodiment of the present application.

[0034] FIG. 20 is a schematic structural diagram of a communication device according to an embodiment of the present application.

[0035] FIG. 21 is a schematic structural diagram of a communication device according to another embodiment of the present application.

[0036] FIG. 22 is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0038] Communication system architecture

[0039] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: wireless local area networks (WLAN), wireless fidelity (WiFi), high performance radio local area networks (HIPELAN), wide area networks (WAN), 5th generation (5G) systems or new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD), and the like. The technical solutions provided in the present application can also be applied to future communication systems, such as the 6th generation mobile communication system, satellite communication systems, and the like. For example, the technical solutions provided in the embodiments of the present application can be applied to communication systems using 802.11 standards. Exemplarily, the 802.11 standards include but are not limited to: 802.11ax standards, 802.11be standards, 802.11bn standards, 802.11 standards of the next generation of 802.11bn (post 802.11bn) standards, and the like.

[0040] FIG. 1 shows an exemplary diagram of an architecture of a wireless communication system to which the embodiments of the present application are applicable. As shown in FIG. 1, communication devices in a communication system 100 can include an access point (AP) 111, an AP 112, and stations (STAs) 121 and 122, wherein the STA 121 can access a network through the AP 111, and the STA 122 can access the network through the AP 112.

[0041] In some implementations, a STA can establish an association relationship with one or more APs, and then the STA and the APs having the association relationship can communicate with each other. As shown in FIG. 1, the AP 111 and the STA 121 can communicate with each other after establishing an association relationship, and the AP 112 and the STA 122 can communicate with each other after establishing an association relationship.

[0042] In some implementations, the communication in the communication system 100 can be the communication between an AP and a non-AP STA, or the communication between a non-AP STA and a non-AP STA, or the communication between a STA and a peer STA, where the peer STA can refer to a device that communicates with the STA, for example, the peer STA can be an AP or a non-AP STA.

[0043] It should be understood that the communication system 100 exemplarily shows two AP STAs and two non-AP STAs, and the communication system 100 can also include a larger number of AP STAs, or the communication system 100 can include other numbers of non-AP STAs, and the embodiments of the present application do not limit this.

[0044] In addition, the above communication system can be applied to a multi-device cooperation scenario, such as a multi-AP (multi-access point, multi-AP) cooperation scenario, or a multi-site cooperation scenario.

[0045] In the embodiments of the present application, the names of APs and / or STAs are not limited. In some scenarios, an AP can also be referred to as an AP STA, that is, in a certain sense, an AP is also a kind of STA. In other scenarios, a STA can also be referred to as a non-AP STA (non-AP STA).

[0046] In some scenarios, the above communication device can also be a multi-link device (multi-link device, MLD), that is, a device that can communicate through multiple communication links, where the multiple communication links can include communication links of different frequency bands, for example, can include communication links of a millimeter wave frequency band and / or a low frequency band. Generally, if the multi-link device is an AP, the AP can also be referred to as an "AP MLD". If the multi-link device is a non-AP STA, the non-AP STA can also be referred to as a "non-AP MLD".

[0047] In the embodiments of the present application, the AP can be a device in a wireless network. The AP can be a communication server, a router, a switch, a bridge, or the like communication entity, or the AP can include various forms of macro base stations, micro base stations, relay stations, and the like, and of course the AP can also be a chip or a circuit or a processing system in these various forms of devices, thereby implementing the methods and functions of the embodiments of the present application. The AP can be applied to various scenarios, such as a sensor node in a smart city (such as a smart water meter, a smart electricity meter, a smart air detection node), a smart device in a smart home (such as a smart camera, a projector, a display screen, a television, a sound box, a refrigerator, a washing machine, and the like), a node in the Internet of Things, an entertainment terminal (such as an AR, a VR, and the like wearable device), a smart device in a smart office (such as a printer, a projector, and the like), a vehicle networking device in vehicle networking, some infrastructure in daily life (such as a vending machine, a self-service navigation station of a supermarket, a self-service cash register device, and a self-service ordering machine), and the like.

[0048] In some implementations, the role of the STA in the communication system is not absolute, and in some scenarios, the STA can act as an AP. For example, in the scenario of a mobile phone connecting a router, the mobile phone can be a non-AP STA, and in the case of the mobile phone acting as a hotspot for other mobile phones, the mobile phone acts as an AP.

[0049] In the embodiments of the present application, the STA in the embodiments of the present application can be a device with wireless transceiving functions, such as a device supporting 802.11 series protocols and capable of communicating with an AP or other STAs. For example, the STA is any user communication device that allows a user to communicate with an AP and thus communicate with a WLAN. The STA is, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile terminal, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.

[0050] The STA in the embodiments of the present application can also be a device providing voice / data / image connectivity to a user, for example, a handheld device, a vehicle-mounted device, a home device, a household appliance, a game device, etc. with wireless connection function or equipped with a wireless communication module. For example, a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a drone or a flight photography device, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved public land mobile network (PLMN), etc. can also be a television, a refrigerator, a washing machine, a kitchen appliance, a door lock, a fish tank, a sweeping robot, a game machine, a camera / camcorder, etc. with wireless connection function, and the embodiments of the present application are not limited thereto.

[0051] By way of example and not limitation, in the embodiments of the present application, the STA can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. For example, a smart watch or smart glasses, etc. and only focus on a certain type of application function, need to be used with other devices such as a smart phone, such as various types of smart wristbands, smart jewelry, etc. for monitoring vital signs.

[0052] In addition, in the embodiments of the present application, the STA can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. In the embodiments of the present application, the IoT technology can achieve massive connection, deep coverage and terminal power saving through, for example, narrow band (NB) technology.

[0053] In addition, in the embodiments of the present application, the STA can be a device in a vehicle-to-everything (V2X) system. The communication mode in the V2X system is collectively referred to as V2X (X represents anything). For example, the V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication or vehicle-to-network (V2N) communication, etc.

[0054] In addition, in the embodiments of the present application, the STA can also include a smart printer, a train detector, a gas station sensor, and the like. The main functions include collecting data (part of the terminal device), receiving control information and downlink data of the AP, and transmitting electromagnetic waves to transmit data to the AP.

[0055] In addition, the AP in the embodiments of the present application can be a device for communicating with the STA. The AP can be a network device in a wireless local area network, and the AP can be used for communicating with the STA through the wireless local area network.

[0056] From the perspective of the communication mode supported by the AP, in some implementation manners, the AP can be a device supporting the 802.11be mode. The AP can also be a device supporting multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0057] From the perspective of the communication mode supported by the STA, in some implementation manners, the non-AP STA can support the 802.11be mode. The non-AP STA can also support multiple current and future WLAN modes of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.

[0058] In the embodiments of the present application, the frequency bands supported by the WLAN technology are not limited. In some implementations, the frequency bands supported by the WLAN technology can include, but are not limited to, low frequency bands (such as 2.4 GHz, 5 GHz, 6 GHz), high frequency bands (such as 45 GHz, 60 GHz).

[0059] It should be understood that the specific forms of the STA and the AP in the embodiments of the present application are not specially limited, and are only exemplary described herein.

[0060] FIG. 2 is an example diagram of a system architecture of another wireless communication system 200 to which the embodiments of the present application are applicable. The wireless communication system 200 can include a network device 210 and a terminal device 220. The network device 210 can be a device that communicates with the terminal device 220. The network device 210 can provide communication coverage for a specific geographic area and can communicate with the terminal device 220 located within the coverage area.

[0061] FIG. 2 exemplarily shows one network device and two terminal devices. Alternatively, the wireless communication system 200 can include multiple network devices and each network device can include other numbers of terminal devices within the coverage range, which are not limited in the embodiments of the present application.

[0062] Alternatively, the wireless communication system 200 can further include a network controller, a mobile management entity, and other network entities, which are not limited in the embodiments of the present application.

[0063] The terminal device in the embodiments of the present application can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The terminal device in the embodiments of the present application can refer to a device that provides voice and / or data connectivity for a user, and can be used to connect people, things and machines, for example, handheld devices with wireless connection functions, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer (Pad), a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides a sidelink signal between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using a sidelink signal. The cellular phone and the smart home device communicate with each other without relaying the communication signal through the base station.

[0064] The network device in the embodiments of the present application can be a device for communicating with a terminal device, which can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, modem or chip for being disposed in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device that undertakes a base station function in device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, a network side device in a 6G network, a device that undertakes a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0065] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to act as a device that communicates with another base station.

[0066] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0067] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on the aircraft, balloon and satellite in the air. The scene where the network device and the terminal device are located is not limited in the embodiments of the present application.

[0068] It should be understood that all or part of the functions of the communication device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0069] Passive Internet of Things device

[0070] With the increase of 5G industry applications, the types and application scenarios of connected objects are increasing, and users will have higher requirements for the price and power consumption of terminal devices. Therefore, the application of battery-free, low-cost passive Internet of Things devices becomes a key technology for cellular Internet of Things, enriches the types and quantities of 5G network link terminals, and truly realizes the interconnection of all things. Among them, the passive Internet of Things device can be based on existing zero-power technology, such as radio frequency identification (RFID) technology, and extended on this basis to be applicable to cellular Internet of Things.

[0071] In the following, taking the passive Internet of Things device including zero-power device and AMP device as an example, the zero-power device and the AMP device are introduced.

[0072] Classification of zero-power device

[0073] The energy harvesting supported by the zero-power device can have multiple types, such as wireless radio frequency, solar energy, thermal energy, mechanical energy, etc. Among them, the zero-power device based on wireless radio frequency energy harvesting may need the network to provide a wireless radio frequency energy supply signal.

[0074] In some scenarios, based on the energy source of the zero-power device and the way of using energy, the zero-power device can be divided into three categories: passive zero-power device, semi-passive zero-power device and active zero-power device.

[0075] The passive zero-power device usually does not need to be equipped with a battery. When the zero-power device approaches a network device (such as a reader of an RFID system), the zero-power device is in the near field formed by the antenna radiation of the network device. At this time, the antenna of the zero-power device can generate an induced current through electromagnetic induction, and the induced current can power the zero-power device to implement demodulation of a received signal, and / or modulation, coding, and the like of a signal to be transmitted. For a backscatter link, the passive zero-power device can use a backscatter mode to transmit a signal.

[0076] As can be seen, neither the forward link (downlink, a link from a network device to a zero-power device) nor the reverse link (uplink, a link from a zero-power device to a network device) of the passive zero-power device needs to be driven by a built-in battery, and the passive zero-power device is a truly zero-power device.

[0077] The passive zero-power device does not need a battery, and therefore, the radio frequency circuit and the baseband circuit of the passive zero-power device are very simple, for example, do not need an LNA, a PA, an analog-to-digital converter (ADC), and the like. In this way, the passive zero-power device has many advantages such as small size, light weight, low price, and long service life.

[0078] In some implementations, the passive zero-power device described above can be an electronic tag, and correspondingly, the network device can be a reader of an RFID system, for reading content in the electronic tag and / or for changing the content in the electronic tag.

[0079] The semi-passive zero-power device itself does not install a conventional battery, but can use an energy harvesting module 121 to harvest energy, and store the harvested energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, the energy storage unit can power the zero-power device to implement demodulation of a received signal, and / or modulation, coding, and the like of a signal to be transmitted. For a backscatter link, the semi-passive zero-power device can use a backscatter mode to transmit a signal.

[0080] As can be seen, neither the forward link nor the reverse link of the semi-passive zero-power device needs to be driven by a built-in battery, and although the energy stored in the capacitor is used in operation, the energy is obtained from the energy harvesting module, and therefore, the semi-passive zero-power device is also a truly zero-power device. The semi-passive zero-power device has many advantages such as small size, light weight, low price, and long service life.

[0081] The active zero-power device can be built-in with a battery (or, in other words, a conventional battery such as a dry battery, a rechargeable lithium battery, or the like). The battery can supply power for the active zero-power device to implement demodulation of a received signal, and / or modulation, coding, and the like of a to-be-transmitted signal. However, for the backscatter link, the active zero-power device uses a backscatter implementation manner to implement transmission of a signal. Therefore, the "zero power" of the active zero-power device is mainly embodied in that the signal transmission of the back link does not need power of the device itself, but uses a backscatter manner.

[0082] Although the active zero-power device uses a battery, due to the use of an ultra-low-power communication technology, the power consumption is very low, and therefore the working life of the battery can be greatly improved.

[0083] In some implementation manners, the active zero-power device described above can be an electronic tag, and the network device can be an RFID reader. At this time, the built-in battery can supply power to an RFID chip in the zero-power device to increase the read-write distance between the RFID reader and the electronic tag. On the other hand, the built-in battery can supply power to the RFID chip in the zero-power device to shorten the read-write latency of the electronic tag by the RFID reader, which is beneficial to improve the reliability of communication. Therefore, the active zero-power device can be applied to some scenarios with relatively high requirements on communication distance, read latency, and the like.

[0084] AMP device

[0085] In a cellular network system (such as an NR system, a 6G system, and the like) and a WiFi system, battery-free and low-cost devices can support low-cost and large-scale deployment and maintenance-free of IoT devices. Currently, the standard is studying how to support an AMP device (or, an AMP IoT device) in a cellular network system and a WiFi system. The energy required for the work of the AMP device comes from environmental energy collection. The source of environmental energy can be wireless signals, solar energy, thermal energy, and the like. Such a device is similar to a passive or semi-passive device in zero-power communication.

[0086] The 3rd generation partner project (3GPP) is discussing a research project about the AMP device. The AMP device is roughly divided into three types of devices, namely, device A, device B, and device C, which have corresponding complexity and communication capabilities. The three types of AMP devices are introduced as follows.

[0087] Device A has no energy storage capability and cannot transmit independent signals. That is, device A communicates by backscattering transmission. Device A has the lowest complexity and power consumption, which can be as low as 1 μW, but its communication distance is limited, generally only a few meters. Device A needs a network device to provide a carrier signal for backscattering transmission.

[0088] Device B has energy storage capability and cannot transmit independent signals. That is, device B communicates by backscattering transmission and can amplify the backscattering signal using stored energy. The complexity and power consumption of device B are between those of device A and device C.

[0089] Device C has energy storage capability and can transmit independent signals. That is, device C has the ability of active transmission. Device C generally has a large-capacity capacitor to store energy from the environment, and the power consumption can support several hundred μW, which can support active signal emission and has a large communication distance. Since device C can perform active emission, it does not need a network device to provide a carrier signal.

[0090] Based on the discussion of the application scenarios of AMP devices based on 3GPP system architecture (SA) 1, AMP devices can be used in at least the following four scenarios.

[0091] Scenario 1: object identification, such as logistics, production line product management, and supply chain management.

[0092] Scenario 2: environmental monitoring, such as temperature, humidity, and harmful gas monitoring of working and natural environments.

[0093] Scenario 3: positioning, such as indoor positioning, intelligent object search, and production line object positioning.

[0094] Scenario 4: intelligent control, such as intelligent control of various appliances in smart homes (turning on / off air conditioners and adjusting temperature) and intelligent control of various facilities in agricultural greenhouses (automatic irrigation and fertilization).

[0095] In a low-power Internet of Things based on a cellular network, an AMP device can directly receive and transmit control, data, or signals from and to a network device and transmit or backscatter data or signals to the network device, as shown in FIG. 3 (referred to as the first topology). Alternatively, an AMP device can communicate with a network device through an intermediate node, in which case the intermediate node transmits control, data, or signals to the AMP device, and the AMP device transmits or backscatters data or signals to the intermediate node, as shown in FIG. 4 (referred to as the second topology).

[0096] It should be noted that in the architecture shown in FIG. 3 and FIG. 4, the transmission of the AMP device is based on the scheduling of the network device. In FIG. 3, the AMP device and the network device communicate directly, and thus the network device can directly send the scheduling information to the AMP device. In FIG. 4, the AMP device communicates with the network device through an intermediate node, and the scheduling information sent by the network device is first sent to the intermediate node and then sent to the AMP device by the intermediate node.

[0097] In some embodiments, if the AMP device sends control, data or signal to the network device or the intermediate node through backscattering, the carrier needs to be provided to the AMP device. In the embodiments of the present application, the node that provides the carrier to the AMP device can be the network device or the intermediate node, or can be another node.

[0098] In some embodiments, the AMP device can send control, data or signal to the network device or the intermediate node through active transmission.

[0099] Channel access mechanism

[0100] The channel access protocol can include a distributed coordination function (DCF), for example, in the 802.11 protocol, the basic channel access protocol can include DCF. According to the introduction of DCF, different compatible STA devices can share the use of the channel through a carrier sense multiple access with collision avoidance (CSMA / CA) mechanism to reduce the probability of collision.

[0101] As an implementation manner, in the channel access process, the STA can determine whether the channel is idle through a carrier sensing mechanism. The carrier sensing can include physical carrier sensing and virtual carrier sensing. In some implementation manners, if any one of the physical carrier sensing and the virtual carrier sensing indicates that the channel is busy, the STA determines that the channel is busy.

[0102] In some implementations, physical carrier sensing employs three types of channel idle detection: energy detection, carrier detection, and energy-carrier hybrid detection. These three types of channel idle detection can be collectively referred to as clear channel assessment (CCA), which can also be referred to as channel idle detection. Energy detection is a judgment of the energy size of a received signal, and when the received power is greater than a threshold (e.g., ED_threshold) specified by the physical layer, the channel is considered to be occupied. Carrier detection is a detection of the preamble portion of a signal in a channel, and a determination of whether the channel is occupied based on the detection result.

[0103] In some implementations, a virtual carrier sensing mechanism is provided by the medium access control (MAC). Certain protocols (e.g., 802.11 protocol) use a network allocation vector (NAV) to implement virtual sensing. Illustratively, for a STA that receives this information, the STA can determine the time for which the channel will be occupied based on the "duration" stored in the Dur / ID field in the MAC frame, and thus determine the time for which the STA's own transmission needs to be delayed. The NAV is a timer that defines how long the current channel needs to be occupied. The starting value (or initial value) of the NAV timer is the duration of the last received frame, and counts down to 0 to end. Each listening STA uses this NAV timer, and when a STA communicates data, the STA occupying the channel will inform other STAs through the "duration" field in the frame how long it needs to occupy the channel, and the STA that has not acquired the channel updates its own NAV value by comparing the "duration" value in the received data packet. When the NAV value is 0 and the physical carrier sensing indicates that the channel is idle, the STA that has not acquired the channel considers the current channel to be in an idle state.

[0104] Some protocols (e.g., 802.11 protocol) employ a request to send / clear to send (RTS / CTS) mechanism to reduce collisions caused by the hidden node problem. The basic idea of the RTS / CTS mechanism is to reserve the channel with a short control packet. If a sending station wants to send a message to a receiving station, it first sends an RTS control frame. Stations around the sending station set their NAV values according to the "duration" field in the RTS control frame after receiving the RTS control frame. The receiving station sends a CTS control frame after receiving the RTS. Stations around the receiving station set their NAV values according to the "duration" field in the CTS control frame after receiving the CTS control frame. Stations with NAV values not equal to zero cannot perform idle sensing, thus avoiding collisions with the transmission between the sending station and the receiving station.

[0105] To avoid collisions as much as possible, some protocols (e.g., 802.11 protocol) specify that all stations must wait a short period of time (during which they continue to sense the channel) after completing a transmission before transmitting the next frame. This period of time is referred to as the interframe space (IFS). High-priority frames require a shorter waiting time and thus have priority over low-priority frames. If a low-priority frame has not yet been transmitted while other high-priority frames have been transmitted to the MAC, the MAC becomes busy, and the low-priority frame must be delayed again. This reduces the probability of collisions. The short interframe space (SIFS) is the shortest time interval and is used to separate frames that require an immediate response, such as control frames (RTS, CTS, ACK).

[0106] In some communication systems, a communication device needs to obtain channel access when it communicates using unlicensed spectrum (or shared spectrum), and can communicate on a transmission opportunity obtained through the channel access. However, some communication devices (such as AMP devices, zero-power devices, and the like) have low complexity due to power consumption constraints. For example, a receiver of such a communication device only supports simple modulation and demodulation modes, such as amplitude shift keying (ASK), frequency shift keying (FSK), and the like, but does not support orthogonal frequency division multiplexing (OFDM). For the use of unlicensed spectrum, to ensure fairness of channel use, such a communication device also needs to perform channel access to obtain a transmission opportunity, for example, needs to perform CCA to determine whether the channel is idle. At the same time, such a communication device also needs to support the CSMA / CA mechanism to be compatible and coexist with legacy devices. Taking a WiFi system as an example, channel occupation of such a communication device needs to support the DCF protocol, which requires the communication device to be able to detect a PPDU frame sent based on OFDM to meet physical carrier sensing and virtual carrier sensing, and to support the RTS / CTS mechanism, which is not achievable for such a device. Therefore, such a communication device does not support the current channel access mechanism (such as the channel access mechanism in the 802.11 protocol), and thus cannot autonomously perform channel access to obtain a transmission opportunity.

[0107] As a possible solution, such a communication device can communicate based on a shared transmission opportunity, for example, perform uplink transmission. As an example, such a communication device can communicate based on a transmission opportunity shared by a network device. As another example, such a communication device can communicate based on a transmission opportunity shared by a communication device compatible with the CSMA / CA mechanism, to avoid the communication device from performing channel access. In this scenario, if a time domain resource in the shared transmission opportunity is not selected and used by the communication device, the shared transmission opportunity can be occupied by other devices, thereby affecting subsequent transmission of the communication device. The problem is described below taking an AMP device as an example.

[0108] In the application scenario of the AMP device, a large number of AMP devices can be concentrated and frequently communicate with the network device. For example, in the logistics and warehousing scenario, a large number of goods need to be transferred, stored, loaded and unloaded, and inventoried in the logistics station or warehouse. With the occurrence of events such as warehouse ordering, goods warehousing, goods management and goods delivery, the AMP device needs to concentrate and frequently communicate with the network device, such as reporting the goods information and positioning information stored by the AMP device. In this case, if the AMP device uses the unlicensed spectrum to communicate with the network device, the AMP device needs to obtain channel access, but the low-complexity AMP device cannot support the current channel access mechanism. At the same time, the concentrated uplink transmission of a large number of AMP devices in a short time can cause conflict in channel use.

[0109] To solve the above problems, as a possible implementation manner, the network device (such as a base station or an AP) or other types of devices (such as a legacy terminal device or a STA compatible with the CSMA / CA mechanism) can perform channel access and share the obtained transmission opportunity for the AMP device to use. Then, the network device can trigger the AMP device to perform multi-user multiplexing in a resource pool. For example, the network device can indicate a resource pool, and the resource pool includes multiplexing resources in the time domain, the frequency domain or the code domain. The AMP devices can perform transmission in a time division multiplexing (TDM), frequency division multiplexing (FDM) or code division multiplexing (CDM) manner.

[0110] However, in some application scenarios (such as logistics and warehousing), it is unknown for the network device whether there is an AMP device or how many AMP devices need to report information. In addition, when the network device schedules the resource pool for the AMP device to communicate, some resources in the resource pool are inevitably unused by the AMP device. In this case, the shared transmission opportunity can be occupied by other devices, thereby affecting the subsequent transmission of the AMP device. For example, if the resources in the resource pool are TDM resources, other devices can perform channel sensing on the idle time domain resources and consider that the channel is idle, so as to occupy the channel for transmission, resulting in that the transmission opportunity shared for the AMP device is lost and cannot be used for the subsequent transmission of the AMP device.

[0111] Based on this, the embodiments of the present application provide the embodiments 1 and 2. The embodiment 1 aims to occupy the channel by the first device sending the first signal on the first time domain resource, so as to facilitate the second device to continue to perform the uplink transmission based on the shared transmission opportunity (i.e., the first shared transmission opportunity). The embodiment 2 aims to perform the channel access by the first device on the first time domain resource, so as to facilitate the second device to perform the uplink transmission based on the new shared transmission opportunity (i.e., the second shared transmission opportunity).

[0112] For the convenience of understanding, the first device and the second device mentioned in the embodiments of the present application are introduced first.

[0113] In some embodiments, the first device and the second device can communicate based on WiFi, or in other words, the first device and the second device can be communication devices in a WiFi system. For example, the first device and the second device can communicate based on the system architecture shown in FIG. 1.

[0114] In some embodiments, the first device and the second device can communicate based on a cellular network, or in other words, the first device and the second device can be communication devices in a cellular network system. For example, the first device and the second device can communicate based on the system architecture shown in FIG. 2.

[0115] In some embodiments, the first device and the second device can communicate based on low-power Internet of Things, or in other words, the first device and the second device can be communication devices in a low-power Internet of Things. For example, the first device and the second device can communicate based on the system architecture shown in FIG. 3 or FIG. 4.

[0116] In some embodiments, the first device can be a network device. For example, the first device can be a base station in a cellular network system. For another example, the first device can be an AP in a WiFi system. Or in other words, the first device can be a device triggering the second device to perform uplink transmission and / or a device receiving the uplink signal sent by the second device.

[0117] In some embodiments, the first device can be a node controlled by a network device. For example, the first device can be a terminal device, such as a terminal device communicating based on a cellular network, or a terminal device (in this case, the terminal device can also be referred to as a STA or a non-AP STA) communicating based on WiFi. For another example, the first device can be a node providing a functional signal for a terminal device. For another example, the first device can be a node providing a carrier for a terminal device (such as the node providing a carrier for a terminal device in FIG. 3 or FIG. 4).

[0118] In some embodiments, the second device can be a terminal device, which can perform uplink transmission based on the shared transmission opportunity. For example, the second device can be an AMP device or a zero-power device. In some embodiments, if the AMP device is based on WiFi communication, the AMP device can be referred to or understood as an AMP STA or an AMP non-AP STA. In some embodiments, if the AMP device is based on cellular network communication, the AMP device can be referred to or understood as an AMP terminal or an AMP device. However, embodiments of the present application are not limited thereto. For example, the second device can be a legacy terminal device, as long as the second device can perform uplink transmission through the shared transmission opportunity.

[0119] In some embodiments, if a network device or other terminal device shares a transmission opportunity (e.g., the first shared transmission opportunity described below) with one or more devices, the second device can be any one of the one or more devices, and embodiments of the present application are not limited thereto.

[0120] Embodiments 1 and 2 are described below, respectively.

[0121] Embodiment 1:

[0122] FIG. 5 is a flow diagram of a method of wireless communication, according to an embodiment of the present application. The method shown in FIG. 5 can be performed by a first device. The method shown in FIG. 5 includes step S510, which is described below.

[0123] At step S510, the first device transmits a first signal on a first time domain resource in a first shared transmission opportunity.

[0124] In some embodiments, the first shared transmission opportunity can include one or more time domain resources. In some embodiments, the one or more time domain resources included in the first shared transmission opportunity are time division multiplexed, i.e., the first shared transmission opportunity can include one or more TDM resources. However, embodiments of the present application are not limited thereto, and the one or more time domain resources included in the first shared transmission opportunity can also be frequency division multiplexed or code division multiplexed.

[0125] In some embodiments, the length of the transmission interval between two adjacent time domain resources of the one or more time domain resources included in the first shared transmission opportunity can be less than the length of a distributed coordination function interframe space (DIFS), so as to avoid occupation of the channel by other devices in the transmission interval. For example, the length of the transmission interval between two adjacent time domain resources of the one or more time domain resources included in the first shared transmission opportunity can be equal to the length of a SIFS. In this way, one or more second devices can successively use the first shared transmission opportunity.

[0126] In some embodiments, the first shared transmission opportunity can be for the second device to perform uplink transmission, i.e., the second device can perform uplink transmission on the first shared transmission opportunity.

[0127] In some embodiments, the first shared transmission opportunity can be shared to the second device by a network device or another terminal device (e.g., a STA) so that the second device performs uplink transmission on the first shared transmission opportunity. As an example, the first shared transmission opportunity can be shared to the second device by a network device (e.g., a base station or an AP). As another example, the first shared transmission opportunity can be shared to the second device by another terminal device (e.g., a terminal device supporting or compatible with a CSMA / CA mechanism).

[0128] In some embodiments, the first time-domain resource can contain one or more time-domain resources. As an example, the first time-domain resource can contain one time-domain resource (e.g., one time slot, one symbol, etc.). As another example, the first time-domain resource can contain multiple time-domain resources (e.g., multiple time slots, multiple symbols, etc.).

[0129] In some embodiments, the first time-domain resource belongs to the first shared transmission opportunity, or in other words, the first time-domain resource belongs to one or more time-domain resources contained in the first shared transmission opportunity. In other words, the one or more time-domain resources contained in the first time-domain resource can be part or all of the one or more time-domain resources contained in the first shared transmission opportunity.

[0130] In some embodiments, the first time-domain resource can include any one or more time-domain resources in the first shared transmission opportunity. For example, the first time-domain resource can be any one or more time-domain resources in the first shared transmission opportunity.

[0131] In some embodiments, the first time-domain resource can include one or more time-domain resources in the first shared transmission opportunity that are not used to perform uplink transmission. For example, the first time-domain resource can be one or more time-domain resources in the first shared transmission opportunity that are not used to perform uplink transmission.

[0132] In some embodiments, the first time-domain resource can be used by the second device to perform uplink transmission on the first shared transmission opportunity. It is noted that although the first time-domain resource can be used by the second device to perform uplink transmission on the first shared transmission opportunity, the second device does not necessarily perform uplink transmission on the first time-domain resource. In other words, the first time-domain resource can be used by the second device to perform uplink transmission on the first shared transmission opportunity contains two meanings: the second device performs uplink transmission on the first time-domain resource in the first shared transmission opportunity, or the second device does not perform uplink transmission on the first time-domain resource in the first shared transmission opportunity.

[0133] In the embodiments of the present application, due to the presence of the first signal, other devices will find that the current channel is not idle when performing channel sensing (such as energy detection or carrier detection), and thus will not perform channel access. The first signal is described in detail below.

[0134] In some embodiments, the first signal can be used to occupy the channel corresponding to the first shared transmission opportunity. Taking the channel corresponding to the first shared transmission opportunity as the first channel as an example, the first signal can be used to occupy the first channel. Therefore, in some embodiments, the first signal can also be understood as or referred to as a placeholder signal. However, the name of the first signal is not limited in the embodiments of the present application. For example, the first signal can also be understood as or referred to as a padding signal, etc.

[0135] In some embodiments, the first signal can be used to protect the first shared transmission opportunity or the first channel. Alternatively, the first device transmits the first signal on the first time domain resource in order to protect the first shared transmission opportunity or the first channel, so as to avoid loss of the first shared transmission opportunity or occupation of the first channel by other devices.

[0136] That is, in embodiment 1, the first device can transmit the first signal on the first time domain resource, so that the first channel is occupied by the first signal on the first time domain resource, thereby facilitating avoidance of occupation of the first shared transmission opportunity (or the first channel) by other devices, and facilitating the second device to continue to perform uplink transmission based on the first shared transmission opportunity subsequently.

[0137] It should be understood that the avoidance of occupation of the first shared transmission opportunity (or the first channel) by other devices mentioned in the embodiments of the present application can be understood as, in the scenario where a network device or other terminal device shares the first shared transmission opportunity with one or more devices, avoiding occupation of the first shared transmission opportunity (or the first channel) by a device that does not belong to the one or more devices.

[0138] The first signal is not limited in the embodiments of the present application. In some embodiments, the first signal can be a PPDU (or referred to as a PPDU frame). In some embodiments, the first signal can be a physical layer signal, such as a preamble signal. Of course, the first signal can also be other signals, such as a protocol pre-defined signal sequence.

[0139] In some embodiments, the first signal is transmitted on the first channel, that is, the first signal is transmitted on the channel corresponding to the first shared transmission opportunity.

[0140] In some embodiments, the first signal is continuously transmitted on the first time domain resource, or in other words, the first signal is continuously transmitted on the first time domain resource. For example, in a scenario where the transmission of the first signal is triggered based on the failure to detect the uplink signal, the first signal can be continuously transmitted from the beginning of the transmission of the first signal to the end of the first time domain resource. For another example, in a scenario where the first signal is directly transmitted at the beginning of the first time domain resource, the first signal can be continuously transmitted from the beginning of the first time domain resource to the end of the transmission of the first signal.

[0141] In some embodiments, the first signal is intermittently transmitted on the first time domain resource, or in other words, the first signal is intermittently transmitted on the first time domain resource. For example, in a scenario where the transmission of the first signal is triggered based on the failure to detect the uplink signal, the first signal can be intermittently transmitted from the beginning of the transmission of the first signal to the end of the first time domain resource. For another example, in a scenario where the first signal is directly transmitted at the beginning of the first time domain resource, the first signal can be intermittently transmitted from the beginning of the first time domain resource to the end of the transmission of the first signal.

[0142] In some embodiments, in a scenario where the first signal is intermittently transmitted on the first time domain resource, the time interval between the end of the first signal of the previous first signal and the beginning of the first signal of the next first signal is less than the length of DIFS. In other words, the time interval between the two first signals is less than the length of DIFS. In this way, during the pause of the transmission of the first signal, other devices cannot determine that the first channel is idle through channel sensing. Here, DIFS is a time interval used by other devices to evaluate whether the channel is idle so as to perform backoff. When the time interval between the first signals is less than the length of DIFS, the other devices cannot satisfy the condition that the channel is idle within DIFS through evaluation, and thus will not perform channel access.

[0143] In some embodiments, as shown in FIG. 6, in a scenario where the first signal is intermittently transmitted on the first time domain resource, the time interval between the end of the first signal of the previous first signal and the beginning of the first signal of the next first signal is equal to the length of SIFS, so that the channel can be protected through intermittent transmission of the first signal. It should be noted that the length of SIFS is less than the length of DIFS. SIFS is used between two transmissions in sequence in the frame exchange process, which can prevent other devices waiting for the channel from attempting to use the channel.

[0144] The embodiments of the present application do not limit the implementation of the first signal triggering. As an implementation, the sending of the first signal is determined based on whether the uplink signal sent by the second device is detected in the first time domain resource. That is, whether the first device sends the first signal is determined based on whether the uplink signal sent by the second device is detected in the first time domain resource. As another implementation, the first device can send the first signal without considering whether the uplink signal sent by the second device is detected in the first time domain resource, but directly sends the first signal at the resource starting position of the first time domain resource. The two implementations are introduced as follows.

[0145] Implementation 1: The sending of the first signal is determined based on whether the uplink signal sent by the second device is detected in the first time domain resource

[0146] As described above, the second device can be any device (such as any AMP device) capable of performing uplink transmission using the first shared transmission opportunity. That is, whether the first device sends the first signal can be determined according to whether the uplink signal sent by any device capable of performing uplink transmission using the first shared transmission opportunity is detected in the first time domain resource.

[0147] In some embodiments, the sending of the first signal is triggered based on that the uplink signal sent by the second device is not detected in the first time domain resource. That is, if the uplink signal sent by any device capable of performing uplink transmission using the first shared transmission opportunity is not detected in the first time domain resource, the first device can send the first signal on the first time domain resource to avoid the loss of the first shared transmission opportunity.

[0148] In some embodiments, if the uplink signal sent by the second device, or the uplink signal sent by any device capable of performing uplink transmission using the first shared transmission opportunity in the first time domain resource is detected, the first device can not send the first signal on the first time domain resource to avoid the interference of the first signal to the uplink signal sent by the second device.

[0149] In some embodiments, the device detecting whether the uplink signal exists in the first time domain resource can be the same device as the device sending the first signal. For example, the first device can detect whether the uplink signal exists in the first time domain resource, and send the first signal in the first time domain resource if no uplink signal is detected. Taking the first device as a network device as an example, the network device can detect whether the uplink signal exists in the first time domain resource, and send the first signal in the first time domain resource if no uplink signal is detected. Taking the first device as a node controlled by a network device as an example, the node controlled by the network device can detect whether the uplink signal exists in the first time domain resource, and send the first signal in the first time domain resource if no uplink signal is detected.

[0150] In some embodiments, the device detecting whether the uplink signal exists in the first time domain resource can be different from the device sending the first signal. For example, the third device can detect whether the uplink signal exists in the first time domain resource, and control the first device to send the first signal in the first time domain resource if no uplink signal is detected. Taking the first device as a node controlled by a network device, and the third device as the network device as an example, the network device can detect whether the uplink signal exists in the first time domain resource, and control the first device to send the first signal in the first time domain resource if no uplink signal is detected. The network device controlled node sending the first signal is beneficial to avoid the first signal leaking to the network device (i.e., the receiving end) to interfere with the uplink signal sent by the second device.

[0151] In some embodiments, the uplink signal can include a PPDU. In some embodiments, as shown in FIG. 7, a typical PPDU can include a preamble, a header, and a payload (i.e., data). The preamble can be a physical layer preamble, the header can be a physical layer header, and the payload can be MAC layer data.

[0152] In some embodiments, when the uplink signal includes a PPDU, the payload in the PPDU can be a null payload. In other words, the uplink signal can include a null PPDU.

[0153] In some embodiments, the uplink signal can include part of the signal in the PPDU. For example, the uplink signal can include the signal in the earlier part of the time domain of the PPDU. In this way, the first device or the third device can determine whether the first time domain resource is used by the second device earlier by detecting the uplink signal, so as to facilitate early channel protection (e.g., sending the first signal early) according to the detection result, and avoid the first shared transmission opportunity being occupied by other devices.

[0154] In some embodiments, the uplink signal can include a preamble in a PPDU. As a specific example, the uplink signal can be a preamble in a PPDU. However, embodiments of the present application are not limited thereto, for example, the uplink signal can be a preamble and a header in a PPDU. In the case where the uplink signal is a preamble in a PPDU, the first device or the third device can detect the preamble in the first time domain resource. If the preamble is detected, the first device can not transmit the first signal. If the preamble is not detected, the first device can transmit the first signal to protect the first shared transmission opportunity (or the first channel). Since the preamble is located at the frontmost part of the time domain of the PPDU, the first device or the third device can determine whether the first time domain resource is used by the second device as early as possible by detecting the preamble, so as to start transmitting the first signal as soon as possible, thereby avoiding the channel being occupied by other devices.

[0155] In some embodiments, the uplink signal can be detected in a first time window. For example, the uplink signal can be detected in the first time window. That is, if the first device or the third device does not detect the uplink signal in the first time window, the first device can transmit the first signal; if the first device or the third device detects the uplink signal in the first time window, the first device can not transmit the first signal.

[0156] In some embodiments, the first time window can start at a resource start position of the first time domain resource. In this way, the first device or the third device can detect whether there is an uplink signal in the first time domain resource as early as possible, so as to ensure that the first device can determine whether to transmit the first signal as early as possible. For example, after the network device transmits a trigger frame (the trigger frame will be described later), a SIFS is waited, and the uplink signal is detected in the first time window after the SIFS, wherein the resource start position of the first time domain resource is one SIFS after the end position of the trigger frame. As shown in FIG. 8, the first device or the third device can start at the resource start position of each time domain resource to detect the uplink signal in the first time window, so as to determine whether the first signal needs to be transmitted according to the detection result of the uplink signal.

[0157] In some embodiments, the length of the first time window can be greater than or equal to the duration of the uplink signal. Taking the uplink signal as a preamble in a PPDU as an example, the length of the first time window can be greater than or equal to the duration of the preamble in the PPDU. As an example, the length of the first time window can be equal to the duration of the preamble in the PPDU. As another example, the length of the first time window can be slightly greater than the duration of the preamble in the PPDU. That is, the length of the first time window should be as short as possible, in this way, the first device can determine whether the first signal needs to be transmitted in a shorter time, so as to perform channel protection as early as possible, thereby reducing the probability that other devices successfully obtain channel access in the first time domain resource.

[0158] In some embodiments, the length of the above-mentioned uplink signal should be as short as possible, for example, the above-mentioned uplink signal can include the preamble in the PPDU, or even part of the signal in the preamble in the PPDU, so as to ensure that the length of the first time window is short.

[0159] As shown in FIG. 9, the first device or the third device can detect the uplink signal in the first time window corresponding to the time domain resource #0. If no uplink signal is detected, the first device can send the first signal after the end of the first time window until the end of the time domain resource #0. Subsequently, the first device or the third device detects the uplink signal in the first time window corresponding to the time domain resource #1, the time domain resource #2 and the time domain resource #3 respectively. If the uplink signal is detected, the first device does not send the first signal on the time domain resource #1, the time domain resource #2 and the time domain resource #3. In the example of FIG. 9, the first time domain resource includes the time domain resource #0.

[0160] As shown in FIG. 10, the first device or the third device can detect the uplink signal in the first time window corresponding to the time domain resource #0. If no uplink signal is detected, the first device can send the first signal after the end of the first time window until the end of the time domain resource #0. Subsequently, the first device or the third device detects the uplink signal in the first time window corresponding to the time domain resource #1. If the uplink signal is detected, the first device does not send the first signal on the time domain resource #1. Then, the first device or the third device can detect the uplink signal in the first time window corresponding to the time domain resource #2. If no uplink signal is detected, the first device can send the first signal after the end of the first time window until the end of the time domain resource #2. Finally, the first device or the third device detects the uplink signal in the first time window corresponding to the time domain resource #3. If the uplink signal is detected, the first device does not send the first signal on the time domain resource #3. In the example of FIG. 10, the first time domain resource includes the time domain resource #0 and the time domain resource #2.

[0161] In some embodiments, the detection of the above-mentioned uplink signal and the listening of the first channel (i.e., the channel corresponding to the first shared transmission opportunity) are performed simultaneously. For example, if the first device or the third device does not detect the uplink signal in the first time domain resource, and the first channel is in an idle state, the first device can send the first signal on the first time domain resource. For another example, if the first device or the third device does not detect the uplink signal on the first time domain resource, but the first channel is in a busy state, the first device can not send the first signal on the first time domain resource.

[0162] In some embodiments, the detection of the uplink signal and the sensing of the first channel can be performed separately. For example, the first device or the third device can only detect whether there is an uplink signal in the first time domain resource without performing channel sensing, so as to determine whether to send the first signal according to whether the uplink signal is detected. For another example, the first device or the third device can only perform channel sensing in the first time domain resource without detecting the uplink signal, so as to determine whether to send the first signal according to the result of the channel sensing. As an example, if the first channel is in an idle state in the first time domain resource, the first device can send the first signal in the first time domain resource.

[0163] In some embodiments, the detection of the uplink signal and the sensing of the first channel can be performed separately. For example, the first device or the third device can only detect whether there is an uplink signal in the first time domain resource without performing channel sensing, so as to determine whether to send the first signal according to whether the uplink signal is detected. For another example, the first device or the third device can only perform channel sensing in the first time domain resource without detecting the uplink signal, so as to determine whether to send the first signal according to the result of the channel sensing. As an example, if the first channel is in an idle state in the first time domain resource, the first device can send the first signal in the first time domain resource.

[0164] In some embodiments, the first device or the third device can continuously perform channel sensing in the first time domain resource. In some embodiments, the first device or the third device can perform channel sensing in part of the first time domain resource. For example, the first device or the third device can perform channel sensing in the earlier time domain resource of the first time domain resource, and when it is determined that the channel is idle after a period of time, the first device sends the first signal in the first time domain resource. As a specific example, the first device or the third device starts channel sensing at the starting position of the first time domain resource, and when it is determined that the channel is idle after a period of time (such as the length of the first time window or other length), the first device sends the first signal in the first time domain resource.

[0165] In some embodiments, in the scenario where the first device performs channel access in the first time domain resource and sends the first signal in the first time domain resource through the obtained first channel, the first signal can be used to schedule resources for the second device to perform uplink transmission in the transmission opportunity obtained through the above channel access. In other words, in some embodiments, the first signal can be a trigger frame, and the related description of the trigger frame can be referred to later, which will not be described here.

[0166] In some embodiments, the first signal can be stopped at the end of the first time domain resource. That is, the transmission of the first signal can continue until the end of the first time domain resource to avoid the first channel being occupied by other devices due to premature termination of the first signal transmission.

[0167] It should be understood that the first signal is transmitted from the start of transmission to the end position of the resource in the first time domain resource. During this period, the first signal can be transmitted continuously or intermittently, and the embodiments of this application are not limited in this regard. For example, the first signal can be transmitted intermittently, and the time interval between the end position of the resource of the previous first signal and the start position of the resource of the next first signal in the intermittently transmitted first signal is less than the length of DIFS.

[0168] Implementation Method 2: The first signal is sent at the resource start position of the first time domain resource.

[0169] In Implementation Method 1, the decision to send the first signal is based on the detection result of the uplink signal. In this case, during the detection process, the sum of the SIFS interval during which the first or third device waits and the length of the detected uplink signal may exceed the length of the DIFS interval. This could cause other devices to listen for idle channels during the DIFS interval and thus occupy the channel for transmission. Therefore, in Implementation Method 2, the first device does not need to determine whether the first time-domain resource is being used by the second device (i.e., whether there is an uplink signal on the first time-domain resource), but instead directly sends the first signal within the first time-domain resource. For example, the first device can send the first signal directly at the beginning position of the first time-domain resource. Alternatively, the first device can send the first signal directly after a short interval following the beginning position of the first time-domain resource.

[0170] In some embodiments, during the process of the first device transmitting a first signal on a first time domain resource, if the first time domain resource is used by the second device to perform uplink transmission, then the first device may need to simultaneously receive the uplink signal transmitted by the second device on the first time domain resource. Referring to Figure 11, taking a network device as an example, during the process of the network device transmitting a first signal on the first time domain resource, if the first time domain resource is used by the second device to perform uplink transmission, then the network device may need to simultaneously receive the uplink signal transmitted by the second device on the first time domain resource.

[0171] In some embodiments, as shown in FIG12, if the resources of the second device in the first channel are FDM, the network device may receive uplink signals sent by multiple second devices in the first channel.

[0172] In some embodiments, the frequency domain resources of the first signal and the frequency domain resources of the uplink signal transmitted by the second device are frequency-division multiplexed.

[0173] In some embodiments, the frequency domain resource of the first signal can overlap with the frequency domain resource of the uplink signal sent by the second device. Referring back to FIG. 11, taking the example that the first signal is continuously sent on the first time domain resource, the frequency domain resource of the first signal can overlap with the frequency domain resource of the uplink signal sent by the second device. Referring to FIG. 13, taking the example that the first signal is discontinuously sent on the first time domain resource, the frequency domain resource of the first signal can overlap with the frequency domain resource of the uplink signal sent by the second device.

[0174] In some embodiments, as shown in FIG. 14, the first signal is code division multiplexed with the uplink signal sent by the second device. For example, in the case that the frequency domain resource of the first signal overlaps with the frequency domain resource of the uplink signal sent by the second device, the first signal and the uplink signal sent by the second device can be code division multiplexed, i.e., the first signal and the uplink signal sent by the second device can use the same frequency domain resource and be spread with different orthogonal codes, so as to ensure certain orthogonality and facilitate the receiving end to demodulate the uplink signal sent by the second device.

[0175] In some embodiments, in the case that the frequency domain resource of the first signal overlaps with the frequency domain resource of the uplink signal sent by the second device, if the first device detects the uplink signal sent by the second device in the process of sending the first signal, the first device can stop sending the first signal.

[0176] In some embodiments, in implementation manner 2, the receiving end (i.e., the network device, which can be the first device) needs to have full duplex capability and strong interference cancellation capability. In this way, the network device can leak the first signal to the received signal for interference cancellation, so as to successfully demodulate the uplink signal sent by the second device. This is relatively easy to achieve when the second device is close to the network device and the power of the received signal and the leaked signal is similar (for example, the power ratio of the received signal and the leaked signal is within a certain range). However, it is relatively difficult to achieve when the second device is far away from the network device and the power of the received signal and the leaked signal is quite different. This is because when the power of the received signal and the leaked signal is quite different, the leaked signal will cause great interference to the received signal, making it difficult for the network device to demodulate the received signal.

[0177] In some embodiments, the first signal can be sent at a lower power to avoid interference to the reception of the uplink signal of the second device by the network device. In this way, for the second device that is far away from the network device, the power of the uplink signal of the second device when it reaches the network device is low, and the network device can also successfully demodulate the uplink signal of the second device.

[0178] The embodiments of the present application do not limit the specific value of the transmission power of the first signal. As an implementation manner, the transmission power of the first signal can be reduced by several decibels at a normal power level, for example, the transmission power of the first signal can be different for different levels of the second device. As another implementation manner, the transmission power of the first signal can be a fixed value with a lower value.

[0179] The embodiments of the present application do not limit the acquisition manner of the transmission power of the first signal. As an implementation manner, the transmission power of the first signal can be predefined by a protocol. As another implementation manner, the transmission power of the first signal can be determined by the network device.

[0180] In some embodiments, the network device can indicate the transmission power of the first signal to the second device. In this way, the second device can adjust the transmission power of the uplink signal according to the transmission power of the first signal, which is beneficial to ensure that the transmission power of the first signal is close to the transmission power of the uplink signal, thereby facilitating the network device to successfully demodulate the uplink signal sent by the second device.

[0181] In some embodiments, if the first device or the third device detects the uplink signal sent by the second device, the first device can stop sending the first signal. That is, the first device can directly send the first signal without detecting the uplink signal, but if the first device detects the uplink signal subsequently, the first device can stop sending the first signal to avoid interference of the transmission of the first signal on the reception of the uplink signal. As shown in FIG. 15, during the process in which the first device sends the first signal, the first device or the third device detects the uplink signal, and then the first device stops sending the first signal.

[0182] Embodiment 2:

[0183] FIG. 16 is a flow diagram of a method of wireless communication provided by another embodiment of the present application. The method shown in FIG. 16 can be performed by the first device. The method shown in FIG. 16 includes step S1610, which will be described below.

[0184] In step S1610, the first device performs channel access on the first time domain resource in the first shared transmission opportunity.

[0185] In some embodiments, the second shared transmission opportunity can include one or more time domain resources. In some embodiments, the one or more time domain resources included in the second shared transmission opportunity are time division multiplexed, that is, the second shared transmission opportunity can include one or more TDM resources. However, the embodiments of the present application are not limited thereto, and the one or more time domain resources included in the second shared transmission opportunity can also be frequency division multiplexed or code division multiplexed.

[0186] In some embodiments, the transmission gap length between two adjacent time domain resources in the one or more time domain resources included in the second shared transmission opportunity is less than the length of DIFS to avoid other devices occupying the channel in the transmission gap. For example, the transmission gap length between two adjacent time domain resources in the one or more time domain resources included in the first shared transmission opportunity can be equal to the length of SIFS.

[0187] In some embodiments, the second shared transmission opportunity can include a time domain resource in the first shared transmission opportunity after the first time domain resource. For details about the first shared transmission opportunity and the first time domain resource, please refer to Embodiment 1, which will not be repeated here.

[0188] In some embodiments, the above channel access is used for the second device to perform uplink transmission on the second shared transmission opportunity. That is, the first device can perform channel access in the first time domain resource and share the obtained second shared transmission opportunity with the second device so that the second device performs uplink transmission on the second shared transmission opportunity.

[0189] In some embodiments, the above channel access is determined based on whether an uplink signal sent by the second device is detected in the first time domain resource. That is, whether the first device performs channel access in the first time domain resource is determined based on whether an uplink signal sent by the second device is detected in the first time domain resource.

[0190] As described above, the second device can be any device (such as any AMP device) capable of performing uplink transmission using the first shared transmission opportunity. That is, whether the first device performs channel access in the first time domain resource can be determined according to whether an uplink signal sent by any device capable of performing uplink transmission using the first shared transmission opportunity is detected in the first time domain resource.

[0191] In some embodiments, the above channel access is triggered based on the fact that no uplink signal sent by the second device is detected in the first time domain resource. That is, if no uplink signal sent by any device capable of performing uplink transmission using the first shared transmission opportunity is detected in the first time domain resource, the first device can perform channel access in the first time domain resource so that the second device can perform uplink transmission based on the newly obtained second shared transmission opportunity.

[0192] In some embodiments, the above Embodiment 1 and Embodiment 2 can be used separately. In some embodiments, the above Embodiment 1 and Embodiment 2 can be used in combination, for example, in the case where no uplink signal is detected in the first time domain resource, the first device can first perform channel access in the first time domain and send the first signal in the first time domain resource through the obtained channel.

[0193] The above describes how to implement the uplink transmission of the second device in combination with Embodiments 1 and 2. The following describes the flow of the method of the present application by way of example. It should be noted that the content not described in detail in the following (such as the first signal, the first time domain resource, etc.) can be referred to the above.

[0194] FIG. 17 is a flow diagram of a method of wireless communication provided by another embodiment of the present application. The method shown in FIG. 17 includes steps S1710 to S1730.

[0195] At step S1710, the network device sends a trigger frame to the second device.

[0196] In some embodiments, the trigger frame can be used to schedule resources, so that the second device performs the uplink transmission based on the scheduled resources. That is, the trigger frame can be used to schedule the resources for the second device to perform the uplink transmission on the shared transmission opportunity (such as the first shared transmission opportunity, the second shared transmission opportunity).

[0197] In other words, the network device can indicate the resource pool through the trigger frame, so that the second device can determine the resources from the resource pool to perform the uplink transmission.

[0198] In some embodiments, a SIFS interval needs to be kept between the end position of the trigger frame and the resource start position of the first time domain resource of the one or more time domain resources indicated by the trigger frame. The use of the SIFS interval can ensure that the second device using the first time domain resource can use the shared transmission opportunity in time and will not be occupied by other devices.

[0199] As shown in FIG. 18, the network device can send a trigger frame to the second device to indicate one or more time domain resources (such as TDM resources), which can be used by the second device to perform the uplink transmission. In the example of FIG. 18, a SIFS interval is kept between the end position of the trigger frame and the time domain resource #0.

[0200] At step S1720, the second device sends an uplink signal to the network device.

[0201] In some embodiments, after receiving the trigger frame, the second device can determine the time domain resource for sending the uplink signal, and send the uplink signal to the network device through the shared transmission opportunity on the time domain resource.

[0202] The implementation manner of the second device determining the time domain resource for sending the uplink signal is not limited in the embodiments of the present application. As an implementation manner, the second device can select the time domain resource for sending the uplink signal from the one or more time domain resources indicated by the network device according to certain rules. For example, the second device can take the modulus of the number of resources according to its own identifier, and determine the used time domain resource based on the obtained result. For another example, the second device can determine the used resource according to certain anti-collision algorithm (such as time slot ALOHA algorithm). As another implementation manner, the second device can determine the time domain resource for sending the uplink signal according to the indication of the network device.

[0203] In some embodiments, due to the uncertainty of the second device determining the time domain resource, some time domain resources can not be used by the second device. As shown in FIG. 19, the time domain resource #0 is not used by the second device to perform uplink transmission. In the example of FIG. 19, the time domain resource filled with shadow is the time domain resource used by the second device, and the time domain resource without filling is the time domain resource not used by the second device.

[0204] In some embodiments, after the network device sends the trigger frame to the second device, the first device (such as the network device or a node controlled by the network device) can detect the uplink signal sent by the second device on the time domain resource. For example, after the SIFS interval after the end of the trigger frame, the first device can detect the uplink signal sent by the second device on each time domain resource. Within the SIFS interval, the first device can complete the necessary transceiver conversion.

[0205] In step S1730, the first device sends a first signal on the first time domain resource or performs channel access on the first time domain resource.

[0206] In some embodiments, after sending the trigger frame, in order to prevent some time domain resources from not being used by the second device and causing the channel to be idle and being used by other devices, the network device can send or control other nodes to send a first signal on the first time domain resource, so that the second device can continue to perform uplink transmission on the shared transmission opportunity subsequently.

[0207] In some embodiments, after sending the trigger frame, in order to prevent some time domain resources from not being used by the second device and causing the channel to be idle and being used by other devices, the network device can perform channel access on the first time domain resource to obtain a new transmission opportunity for the second device to use.

[0208] For detailed introduction of step S1730, please refer to the foregoing embodiment 1 and embodiment 2, which will not be repeated here.

[0209] It should be noted that the execution sequence of step S1720 and step S1730 is not limited in the embodiments of the present application. For example, step S1720 and step S1730 can be executed simultaneously. For another example, step S1720 is executed after step S1730.

[0210] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments and the description of the device embodiments correspond to each other, and therefore, the parts not described in detail can be referred to the foregoing method embodiments.

[0211] FIG. 20 is a structural schematic diagram of a communication device provided by an embodiment of the present application. The communication device 2000 shown in FIG. 20 can be any first device described above. The communication device 2000 includes a sending module 2010 or a channel access module 2020. The sending module 2010 can be used to send a first signal on a first time domain resource in a first shared transmission opportunity. The channel access module 2020 can be used to perform channel access on the first time domain resource in the first shared transmission opportunity, the channel access being used for a second device to perform uplink transmission on a second shared transmission opportunity, the second shared transmission opportunity including a time domain resource located after the first time domain resource in the first shared transmission opportunity; wherein the first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

[0212] In some embodiments, the sending of the first signal and / or the channel access is determined based on whether an uplink signal sent by the second device is detected within the first time domain resource.

[0213] In some embodiments, the sending of the first signal and / or the channel access is triggered based on that the uplink signal sent by the second device is not detected within the first time domain resource.

[0214] In some embodiments, whether the uplink signal exists within the first time domain resource is detected by the first device or a third device.

[0215] In some embodiments, the uplink signal includes a PPDU, or the uplink signal includes a partial signal in a PPDU.

[0216] In some embodiments, the uplink signal is a preamble in a PPDU.

[0217] In some embodiments, the uplink signal is detected within a first time window, wherein the first time window starts at a resource start position of the first time domain resource.

[0218] In some embodiments, a length of the first time window is greater than or equal to a duration of the uplink signal.

[0219] In some embodiments, the first signal stops transmitting at an end position of the resource of the first time domain resource.

[0220] In some embodiments, if the uplink signal is not detected within the first time domain resource, the sending module is configured to send the first signal on the first time domain resource through a first channel, the first channel being obtained by the first device performing channel access on the first time domain resource.

[0221] In some embodiments, the first signal is used to schedule resources of the second device performing uplink transmission on a transmission opportunity obtained through the channel access.

[0222] In some embodiments, the first signal is sent on a first channel, and the communication device further comprises a listening module configured to listen to the first channel within the first time domain resource; and the sending module is configured to send the first signal on the first time domain resource if the first channel is in an idle state.

[0223] In some embodiments, the first signal is sent at a start position of the resource of the first time domain resource.

[0224] In some embodiments, the communication device further comprises a stopping module configured to stop sending the first signal if the uplink signal sent by the second device is detected.

[0225] In some embodiments, a frequency domain resource of the first signal overlaps with a frequency domain resource of the uplink signal sent by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal sent by the second device.

[0226] In some embodiments, the first signal is code division multiplexed with the uplink signal sent by the second device.

[0227] In some embodiments, the first signal is continuously sent on the first time domain resource, or the first signal is intermittently sent on the first time domain resource.

[0228] In some embodiments, the first signal is intermittently sent on the first time domain resource, and a time interval between an end position of a first one of the intermittently sent first signals and a start position of a second one of the intermittently sent first signals is less than a length of DIFS.

[0229] In some embodiments, a length of a transmission gap between two adjacent time domain resources in the one or more time domain resources included in the first shared transmission opportunity and / or the second shared transmission opportunity is equal to a length of SIFS.

[0230] In some embodiments, the one or more time domain resources included in the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources included in the second shared transmission opportunity are time division multiplexed.

[0231] In some embodiments, the first device comprises one of: a network device, a terminal device, a node providing a supply signal for a terminal device, and a node providing a carrier for a terminal device.

[0232] In some embodiments, the second device is an AMP device.

[0233] In some embodiments, the sending module 2010 can be a transceiver 2230, and the channel access module 2020 can be a processor 2210. The communication device 2000 can further include a memory 2220, as shown in FIG. 22.

[0234] FIG. 21 is a structural schematic diagram of a communication device according to another embodiment of the present application. The communication device 2100 shown in FIG. 21 can be any of the second devices described above. The communication device 2100 includes a first sending module 2110 or a second sending module 2120. The first sending module 2110 can be configured to perform uplink transmission on a first channel based on a first shared transmission opportunity, the first channel being occupied by a first signal transmitted by a first device on a first time domain resource in the first shared transmission opportunity. The second sending module 2120 can be configured to perform uplink transmission on the first channel based on a second shared transmission opportunity, the first channel being accessed by the first device on a first time domain resource in the first shared transmission opportunity, the second shared transmission opportunity including a time domain resource after the first time domain resource in the first shared transmission opportunity; wherein the first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

[0235] In some embodiments, the sending of the first signal and / or the accessing of the first channel is determined based on whether an uplink signal transmitted by the second device is detected within the first time domain resource.

[0236] In some embodiments, the sending of the first signal and / or the accessing of the first channel is triggered based on that no uplink signal transmitted by the second device is detected within the first time domain resource.

[0237] In some embodiments, whether the uplink signal exists in the first time domain resource is detected by the first device or the third device.

[0238] In some embodiments, the uplink signal comprises a PPDU, or the uplink signal comprises a partial signal in a PPDU.

[0239] In some embodiments, the uplink signal is a preamble in a PPDU.

[0240] In some embodiments, the uplink signal is detected in a first time window, wherein the first time window starts at a resource start position of the first time domain resource.

[0241] In some embodiments, a length of the first time window is greater than or equal to a duration of the uplink signal.

[0242] In some embodiments, the first signal stops transmitting at a resource end position of the first time domain resource.

[0243] In some embodiments, the first signal is transmitted on the first time domain resource by a first channel obtained after performing channel access on the first time domain resource.

[0244] In some embodiments, the first signal is used for scheduling a resource of the second device for performing uplink transmission on a transmission opportunity obtained by the channel access.

[0245] In some embodiments, the transmission of the first signal is triggered based on the first channel being in an idle state.

[0246] In some embodiments, the first signal is transmitted at a resource start position of the first time domain resource.

[0247] In some embodiments, the first signal stops transmitting after detecting an uplink signal transmitted by the second device.

[0248] In some embodiments, a frequency domain resource of the first signal overlaps with a frequency domain resource of the uplink signal transmitted by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal transmitted by the second device.

[0249] In some embodiments, the first signal is code division multiplexed with the uplink signal transmitted by the second device.

[0250] In some embodiments, the first signal is continuously transmitted on the first time domain resource, or the first signal is intermittently transmitted on the first time domain resource.

[0251] In some embodiments, the first signals are transmitted at intervals on the first time domain resources, and a time interval between an end position of a resource of a previous one of the first signals transmitted at intervals and a start position of a resource of a next one of the first signals transmitted at intervals is less than a length of the DIFS.

[0252] In some embodiments, a length of a transmission interval between two adjacent time domain resources of the one or more time domain resources included in the first shared transmission opportunity and / or the second shared transmission opportunity is equal to a length of the SIFS.

[0253] In some embodiments, the one or more time domain resources included in the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources included in the second shared transmission opportunity are time division multiplexed.

[0254] In some embodiments, the first device comprises one of the following: a network device, a terminal device, a node providing an energizing signal for a terminal device, and a node providing a carrier for a terminal device.

[0255] In some embodiments, the second device is an AMP device.

[0256] In some embodiments, the first sending module 2110 and the second sending module 2120 can be a transceiver 2230. The communication device 2100 can further include a processor 2210 and a memory 2220, as shown in FIG. 22.

[0257] FIG. 22 is a schematic structural diagram of an apparatus for communication according to an embodiment of the present application. The dashed line in FIG. 22 indicates that the unit or module is optional. The apparatus 2200 can be used to implement the method described in the above method embodiments. The apparatus 2200 can be a chip or a communication device.

[0258] The apparatus 2200 can include one or more processors 2210. The processor 2210 can support the apparatus 2200 to implement the methods described in the foregoing method embodiments. The processor 2210 can be a general purpose processor or a dedicated processor. For example, the processor can be a central processing unit (CPU). Alternatively, the processor can also be other general purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, etc. The general purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0259] The apparatus 2200 can also include one or more memories 2220. The memory 2220 stores programs, which can be executed by the processor 2210, so that the processor 2210 performs the methods described in the foregoing method embodiments. The memory 2220 can be independent of the processor 2210 or integrated in the processor 2210.

[0260] The apparatus 2200 can also include a transceiver 2230. The processor 2210 can communicate with other devices or chips through the transceiver 2230. For example, the processor 2210 can perform data transceiving with other devices or chips through the transceiver 2230.

[0261] The embodiments of the present application also provide a computer readable storage medium for storing programs. The computer readable storage medium can be applied to the communication device provided by the embodiments of the present application, and the programs make the computer execute the methods performed by the communication device in the embodiments of the present application.

[0262] The embodiments of the present application also provide a computer program product. The computer program product includes programs. The computer program product can be applied to the communication device provided by the embodiments of the present application, and the programs make the computer execute the methods performed by the communication device in the embodiments of the present application.

[0263] The embodiments of the present application also provide a computer program. The computer program can be applied to the communication device provided by the embodiments of the present application, and the computer program makes the computer execute the methods performed by the communication device in the embodiments of the present application.

[0264] It should be understood that the terms "system" and "network" can be used interchangeably in this application. In addition, the terms used in this application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third", and "fourth" and the like in the specification and claims of the application and the drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0265] In embodiments of the present application, a "field" can also be referred to as a "domain", a "subfield" or a "subdomain". A field can occupy one or more bytes (octets), or a field can occupy one or more bits.

[0266] The field names defined in embodiments of the present application are only examples, and the fields can have other names.

[0267] In embodiments of the present application, the term "indicate" can be direct indication, indirect indication, or can indicate an associated relationship. For example, A indicates B, which can mean that B can be obtained directly through A; or it can mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; or it can mean that A and B have an associated relationship.

[0268] In embodiments of the present application, "B corresponding to A" means that B is associated with A and can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0269] In embodiments of the present application, the term "corresponding" can mean a direct or indirect corresponding relationship between the two, or can mean an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, etc.

[0270] In embodiments of the present application, "predefined" or "preconfigured" can be achieved by pre-saving corresponding codes, tables or other means for indicating related information in devices (such as including AP and STA), and the specific implementation manner is not limited in the present application. For example, predefinition can mean definition in a protocol.

[0271] In embodiments of the present application, the term "and / or" is only a description of the associated relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally means that the associated objects before and after are in an "or" relationship.

[0272] In the embodiments of the present application, the "comprising" can mean directly comprising or indirectly comprising. Alternatively, the "comprising" mentioned in the embodiments of the present application can be replaced by "indicating" or "for determining". For example, A comprising B can be replaced by A indicating B, or A for determining B.

[0273] In various embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0274] In the embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, for example, it can include WiFi protocol and related protocols applied to future WiFi communication systems, which is not limited in the present application.

[0275] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0276] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiments of the present application.

[0277] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0278] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server, data center and the like integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, digital video disc (DVD)) or semiconductor media (for example, solid state disk (SSD)) and the like.

[0279] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising: Comprising: The first device transmits a first signal on a first time domain resource in a first shared transmission opportunity; Or, The first device performs channel access on a first time domain resource in a first shared transmission opportunity, the channel access being used for a second device to perform uplink transmission on a second shared transmission opportunity, the second shared transmission opportunity comprising a time domain resource in the first shared transmission opportunity after the first time domain resource; Wherein, the first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

2. The method of claim 1, wherein, The transmission of the first signal and / or the channel access is determined based on whether an uplink signal transmitted by the second device is detected within the first time domain resource.

3. The method according to claim 1 or 2, characterized in that, The transmission of the first signal and / or the channel access is triggered based on the fact that the uplink signal transmitted by the second device is not detected within the first time domain resource.

4. The method according to claim 2 or 3, characterized in that, Whether the uplink signal exists within the first time domain resource is detected by the first device or a third device.

5. The method according to any one of claims 2-4, characterized in that, The uplink signal comprises a physical layer protocol data unit (PPDU), or the uplink signal comprises a partial signal in a PPDU.

6. The method of claim 5, wherein, The uplink signal is a preamble in a PPDU.

7. The method according to any one of claims 2-6, characterized in that, The uplink signal is detected within a first time window, wherein the first time window starts at a resource start position of the first time domain resource.

8. The method of claim 7, wherein, The length of the first time window is greater than or equal to the duration of the uplink signal.

9. The method according to any one of claims 2-8, characterized in that, The first signal stops being transmitted at a resource end position of the first time domain resource.

10. The method according to any one of claims 2-9, characterized in that, If the uplink signal is not detected within the first time domain resource, the first device transmits the first signal on the first time domain resource, comprising: The first device performs channel access on the first time domain resource and transmits the first signal on the first time domain resource through the obtained first channel.

11. The method of claim 10, wherein, The first signal is used to schedule resources for the second device to perform uplink transmission on a transmission opportunity obtained through the channel access.

12. The method according to any one of claims 1-11, characterized in that, The first signal is transmitted on a first channel, and the method further comprises: The first device listens to the first channel within the first time domain resource; The first device transmits the first signal on the first time domain resource, comprising: If the first channel is in an idle state, the first device transmits the first signal on the first time domain resource.

13. The method of claim 1, wherein, The first signal is transmitted at a resource start position of the first time domain resource.

14. The method of claim 13, wherein, The method further comprises: If the uplink signal transmitted by the second device is detected, the first device stops transmitting the first signal.

15. The method according to claim 13 or 14, characterized in that, The frequency domain resource of the first signal overlaps with the frequency domain resource of the uplink signal transmitted by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal transmitted by the second device.

16. The method of claim 15, wherein, The first signal is code division multiplexed with the uplink signal transmitted by the second device.

17. The method of any one of claims 1-16, wherein, The first signal is continuously transmitted on the first time domain resource, or the first signal is intermittently transmitted on the first time domain resource.

18. The method of claim 17, wherein, The first signals are sent at intervals on the first time domain resources, and a time interval between an end position of a previous one of the first signals sent at intervals and a start position of a next one of the first signals is less than a length of a distributed coordination function interframe space (DIFS).

19. The method of any one of claims 1-18, wherein, A transmission interval length between two adjacent time domain resources in the one or more time domain resources included in the first shared transmission opportunity and / or the second shared transmission opportunity is equal to a length of a short interframe space (SIFS).

20. The method of any one of claims 1-19, wherein, The one or more time domain resources included in the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources included in the second shared transmission opportunity are time division multiplexed.

21. The method of any one of claims 1-20, wherein, The first device is one of: a network device, a terminal device, a node providing a supply signal for the terminal device, and a node providing a carrier for the terminal device.

22. The method of any one of claims 1-21, wherein, The second device is an AMP device.

23. A method of wireless communication, comprising: The first device comprises: The second device performs uplink transmission on the first channel based on the first shared transmission opportunity, the first channel being occupied by a first signal sent by the first device on a first time domain resource in the first shared transmission opportunity; Or, The second device performs uplink transmission on the first channel based on the second shared transmission opportunity, the first channel being accessed by the first device on a first time domain resource in the first shared transmission opportunity, and the second shared transmission opportunity including a time domain resource after the first time domain resource in the first shared transmission opportunity; The first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

24. The method of claim 23, wherein, The sending of the first signal and / or the access of the first channel is determined based on whether an uplink signal sent by the second device is detected within the first time domain resource.

25. The method of claim 23 or 24, wherein, The sending of the first signal and / or the access of the first channel is triggered based on the uplink signal sent by the second device not being detected within the first time domain resource.

26. The method of claim 24 or 25, wherein, Whether the uplink signal exists within the first time domain resource is detected by the first device or a third device.

27. The method of any one of claims 24-26, wherein, The uplink signal comprises a physical layer protocol data unit (PPDU), or the uplink signal comprises a partial signal in the PPDU.

28. The method of claim 27, wherein, The uplink signal is a preamble in the PPDU.

29. The method of any one of claims 24-28, wherein, The uplink signal is detected within a first time window, and the first time window starts at a start position of the first time domain resource.

30. The method of claim 29, wherein, A length of the first time window is greater than or equal to a duration of the uplink signal.

31. The method of any one of claims 24-30, wherein, The first signal stops being sent at an end position of the first time domain resource.

32. The method of any one of claims 24-31, wherein, The first signal is sent on the first time domain resource by the first channel obtained after channel access on the first time domain resource.

33. The method of claim 32, wherein, The first signal is used to schedule resources for the second device to perform uplink transmission on a transmission opportunity obtained by the channel access.

34. The method of any one of claims 23-33, wherein, The sending of the first signal is triggered based on the first channel being in an idle state.

35. The method of claim 23, wherein, The first signal is sent at a start position of the first time domain resource.

36. The method of claim 35, wherein, The first signal is stopped sending after detecting the uplink signal sent by the second device.

37. The method of claim 35 or 36, wherein, The frequency domain resource of the first signal overlaps with the frequency domain resource of the uplink signal sent by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal sent by the second device.

38. The method of claim 37, wherein, The first signal is code division multiplexed with the uplink signal sent by the second device.

39. The method of any one of claims 23-38, wherein, The first signal is continuously sent on the first time domain resource, or the first signal is intermittently sent on the first time domain resource.

40. The method of claim 39, wherein, The first signal is intermittently sent on the first time domain resource, and the time interval between the end position of the resource of the previous first signal and the start position of the resource of the next first signal in the intermittently sent first signal is less than the length of the Distributed Coordination Function Inter-Frame Space (DIFS).

41. The method of any one of claims 23-40, wherein, The transmission interval length between adjacent two time domain resources included in the first shared transmission opportunity and / or the second shared transmission opportunity is equal to the length of the Short Inter-Frame Space (SIFS).

42. The method of any one of claims 23-41, wherein, The one or more time domain resources included in the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources included in the second shared transmission opportunity are time division multiplexed.

43. The method of any one of claims 23-42, wherein, The first device includes one of the following: a network device, a terminal device, a node providing an energizing signal for the terminal device, and a node providing a carrier for the terminal device.

44. The method of any one of claims 23-43, wherein, The second device is an AMP device.

45. A communications device, characterized by The communication device is the first device, and the communication device includes: a sending module configured to send a first signal on a first time domain resource in a first shared transmission opportunity; or a channel access module configured to perform channel access on the first time domain resource in the first shared transmission opportunity, wherein the channel access is used for the second device to perform uplink transmission on a second shared transmission opportunity, and the second shared transmission opportunity includes time domain resources located after the first time domain resource in the first shared transmission opportunity. The first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

46. The communication device of claim 45, wherein, The sending of the first signal and / or the channel access is determined based on whether the uplink signal sent by the second device is detected within the first time domain resource.

47. The communication device of claim 45 or 46, wherein, The sending of the first signal and / or the channel access is triggered based on the uplink signal sent by the second device not being detected within the first time domain resource.

48. The communication device of claim 46 or 47, wherein, Whether the uplink signal exists within the first time domain resource is detected by the first device or a third device.

49. The communication device of any of claims 46-48, wherein, The uplink signal includes a Physical Layer Protocol Data Unit (PPDU), or the uplink signal includes a partial signal in the PPDU.

50. The communication device of claim 49, wherein, The uplink signal is a preamble in the PPDU.

51. The communication device of any of claims 46-50, wherein, The uplink signal is detected within a first time window, wherein the first time window starts at the start position of the resource of the first time domain resource.

52. The communication device of claim 51, wherein, The length of the first time window is greater than or equal to the duration of the uplink signal.

53. The communication device of any of claims 46-52, wherein, The first signal is stopped sending at the end position of the resource of the first time domain resource.

54. The communication device of any of claims 46-53, wherein, If the uplink signal is not detected in the first time domain resource, the sending module is configured to: send the first signal on the first time domain resource through a first channel, the first channel being obtained by the first device performing channel access on the first time domain resource.

55. The communication device of claim 54, wherein, The first signal is used to schedule resources for the second device to perform uplink transmission on a transmission opportunity obtained through the channel access.

56. The communication device of any of claims 45-55, wherein, The first signal is sent on a first channel, and the communication device further comprises: a listening module configured to listen to the first channel in the first time domain resource; The sending module is configured to send the first signal on the first time domain resource if the first channel is in an idle state.

57. The communications device of claim 45, wherein The first signal is sent at a resource start position of the first time domain resource.

58. The communication device of claim 57, wherein, The communication device further comprises: a stopping module configured to stop sending the first signal if the uplink signal sent by the second device is detected.

59. The communication device of claim 57 or 58, wherein, The frequency domain resource of the first signal overlaps with the frequency domain resource of the uplink signal sent by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal sent by the second device.

60. The communication device of claim 59, wherein, The first signal is code division multiplexed with the uplink signal sent by the second device.

61. The communication device of any of claims 45-60, wherein, The first signal is continuously sent on the first time domain resource, or the first signal is sent at intervals on the first time domain resource.

62. The communication device of claim 61, wherein, The first signal is sent at intervals on the first time domain resource, and the time interval between the resource end position of the previous first signal in the interval-sent first signal and the resource start position of the next first signal is less than the length of the distributed coordination function interframe spacing (DIFS).

63. The communication device of any of claims 45-62, wherein, The transmission interval length between adjacent two time domain resources contained in the one or more time domain resources of the first shared transmission opportunity and / or the second shared transmission opportunity is equal to the length of the short interframe spacing (SIFS).

64. The communication device of any of claims 45-63, wherein, The one or more time domain resources contained in the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources contained in the second shared transmission opportunity are time division multiplexed.

65. The communication device of any of claims 45-64, wherein, The first device comprises one of the following: a network device, a terminal device, a node providing an energizing signal for the terminal device, and a node providing a carrier for the terminal device.

66. The communication device of any of claims 45-65, wherein, The second device is an AMP device.

67. A communications device, characterized by The communication device is a second device, and the communication device comprises: a first sending module configured to perform uplink transmission on a first channel based on a first shared transmission opportunity, the first channel being occupied by a first signal sent by a first device on a first time domain resource in the first shared transmission opportunity; or a second sending module configured to perform uplink transmission on a first channel based on a second shared transmission opportunity, the first channel being accessed by a first device on a first time domain resource in the first shared transmission opportunity, and the second shared transmission opportunity comprising a time domain resource located after the first time domain resource in the first shared transmission opportunity; wherein the first time domain resource is used for the second device to perform uplink transmission on the first shared transmission opportunity, and the first device is a network device or a node controlled by the network device.

68. The communication device of claim 67, wherein, The sending of the first signal and / or the accessing of the first channel is determined based on whether an uplink signal sent by the second device is detected within the first time domain resource.

69. The communication device of claim 67 or 68, wherein, The sending of the first signal and / or the accessing of the first channel is triggered based on the uplink signal sent by the second device not being detected within the first time domain resource.

70. The communication device of claim 68 or 69, wherein, Whether the uplink signal exists within the first time domain resource is detected by the first device or a third device.

71. The communication device of any of claims 68-70, wherein, The uplink signal comprises a physical layer protocol data unit (PPDU), or the uplink signal comprises a partial signal in the PPDU.

72. The communication device of claim 71, wherein, The uplink signal is a preamble in the PPDU.

73. The communication device of any of claims 68-72, wherein, The uplink signal is detected within a first time window, wherein the first time window starts at a resource start position of the first time domain resource.

74. The communication device of claim 73, wherein, A length of the first time window is greater than or equal to a duration of the uplink signal.

75. The communication device of any of claims 68-74, wherein, The first signal stops being sent at a resource end position of the first time domain resource.

76. The communication device of any of claims 68-75, wherein, The first signal is sent on the first time domain resource by the first channel obtained after performing channel access on the first time domain resource.

77. The communication device of claim 76, wherein, The first signal is used for scheduling resources of the second device to perform uplink transmission on a transmission opportunity obtained by the channel access.

78. The communication device of any of claims 67-77, wherein, The sending of the first signal is triggered based on the first channel being in an idle state.

79. The communication device of claim 67, wherein, The first signal is sent at a resource start position of the first time domain resource.

80. The communication device of claim 79, wherein, The first signal stops being sent after detecting the uplink signal sent by the second device.

81. The communication device of claim 79 or 80, wherein, A frequency domain resource of the first signal overlaps a frequency domain resource of the uplink signal sent by the second device, or the frequency domain resource of the first signal is frequency division multiplexed with the frequency domain resource of the uplink signal sent by the second device.

82. The communication device of claim 81, wherein, The first signal is code division multiplexed with the uplink signal sent by the second device.

83. The communication device of any of claims 67-82, wherein, The first signal is continuously sent on the first time domain resource, or the first signal is intermittently sent on the first time domain resource.

84. The communication device of claim 83, wherein, The first signal is intermittently sent on the first time domain resource, and a time interval between a resource end position of a previous first signal and a resource start position of a next first signal in the intermittently sent first signals is less than a length of a distributed coordination function interframe space (DIFS).

85. The communication device of any of claims 67-84, wherein, A transmission interval length between two adjacent time domain resources in the one or more time domain resources contained by the first shared transmission opportunity and / or the second shared transmission opportunity is equal to a length of a short interframe space (SIFS).

86. The communication device of any of claims 67-85, wherein, The one or more time domain resources contained by the first shared transmission opportunity are time division multiplexed, and / or the one or more time domain resources contained by the second shared transmission opportunity are time division multiplexed.

87. The communication device of any of claims 67-86, wherein, The first device comprises one of the following: a network device, a terminal device, a node providing an energizing signal for the terminal device, and a node providing a carrier for the terminal device.

88. The communication device of any of claims 67-87, wherein, The second device is an AMP device.

89. A communications device, characterized by A communication device comprising a transceiver, a memory for storing a program, and a processor for invoking the program in the memory and controlling the transceiver to receive or send a signal, so as to make the communication device perform the method of any one of claims 1-22 or 23-44.

90. An apparatus comprising: A device comprising a processor for invoking a program from a memory, so as to make the device perform the method of any one of claims 1-22 or 23-44.

91. A chip, comprising: A chip comprising a processor for invoking a program from a memory, so that the device installed with the chip performs the method of any one of claims 1-22 or 23-44.

92. A computer-readable storage medium, characterized in that, A computer program product having stored thereon a program, the program causing a computer to perform the method of any one of claims 1-22 or 23-44.

93. A computer program product, characterized in that, A computer program product having stored thereon a program, the program causing a computer to perform the method of any one of claims 1-22 or 23-44.

94. A computer program, characterized in that, The computer program product causes a computer to perform the method of any one of claims 1-22 or 23-44.

Images