Wireless communication method, communication device, and network device

Abstract

Provided are a wireless communication method, a communication device, and a network device. The method comprises: a first device receives first information sent by a network device. The first information is related to the transmit power of a first carrier sent by the first device, and a reflected carrier corresponding to the first carrier is used by a first terminal device to send a data signal to the network device. On the basis of the first information, transmit power control of the first carrier can be achieved. When transmit power control of the first carrier is achieved, transmit power control can also be achieved for a reflected wave of the first carrier, thereby achieving power control of the first terminal device for transmitting the signal to the network device.

Description

Wireless communication method, communication device, and network device Technical Field

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

[0002] In recent years, the application of zero-power devices has become more and more extensive. During the standardization discussion process, the zero-power Internet of Things can also be referred to as the ambient power enabled internet of things (A-IoT) or the ambient internet of things (A-IoT). A-IoT devices can refer to Internet of Things (IoT) devices that use various environmental energies, such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other environmental energies to drive themselves. Such devices may have no energy storage capacity, or may have very limited energy storage capacity (such as using capacitors with a capacity of tens of uF). Compared with IoT devices in related technologies, A-IoT devices have many advantages such as no conventional battery, no maintenance, small size, low complexity, low cost, and long life cycle.

[0003] In the A-IoT scenario, how to perform power control is an urgent problem that needs to be solved.

[0004] Summary of the Invention

[0005] The present application provides a wireless communication method, a communication device, and a network device. The following introduces various aspects of the present application.

[0006] In a first aspect, a wireless communication method is provided, which includes: a first device receives first information sent by a network device; wherein, the first information is related to the transmission power of a first carrier sent by the first device, and a reflected carrier corresponding to the first carrier is used by a first terminal device to send a data signal to the network device.

[0007] In a second aspect, a wireless communication method is provided, which includes: a network device sends first information to a first device; wherein the first information is related to the transmission power of a first carrier sent by the first device, and a reflected carrier corresponding to the first carrier is used by the first terminal device to send a data signal to the network device.

[0008] According to a third aspect, a communication device is provided, which is a first device and includes: a receiving unit for receiving first information sent by a network device; wherein the first information is related to the transmission power of a first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send a data signal to the network device.

[0009] In a fourth aspect, a network device is provided, including: a sending unit for sending first information to a first device; wherein the first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send a data signal to the network device.

[0010] In a fifth aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the communication device executes part or all of the steps in the method of the first aspect.

[0011] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0012] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned communication device and / or network device. In another possible design, the system may also include other devices that interact with the communication device or network device in the solution provided in the embodiment of the present application.

[0013] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device and / or a network device to execute part or all of the steps in the methods of the above aspects.

[0014] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device and / or network device to perform some or all of the steps of the methods of the various aspects described above. In some implementations, the computer program product may be a software installation package.

[0015] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0016] Based on the first information, the transmission power of the first carrier can be controlled. When the transmission power of the first carrier is controlled, the reflected wave of the first carrier can also be controlled, thereby achieving power control of the signal transmitted by the first terminal device to the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0018] FIG2 is a schematic diagram of a zero-power communication network used in an embodiment of the present application.

[0019] FIG3 is a schematic diagram of backscatter communication.

[0020] FIG4 is a schematic diagram of circuits involved in backscatter communication.

[0021] Figure 5 is an example diagram of an A-IoT deployment scenario.

[0022] Figure 6 is an example diagram of another A-IoT deployment scenario.

[0023] FIG7 is a schematic flow chart of the inventory mechanism.

[0024] FIG8 is a schematic diagram of a transmission scheme.

[0025] FIG9 is a schematic diagram of another transmission scheme.

[0026] FIG10 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0027] FIG11 is a schematic diagram of the first path and the second path.

[0028] FIG12 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0029] FIG13 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0030] FIG14 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solution in this application will be described below with reference to the accompanying drawings.

[0032] Communication System

[0033] FIG1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include communication devices. The communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0034] FIG1 exemplarily shows a network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0035] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0036] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0037] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal device, user unit, user station, mobile station, mobile station (MS), mobile terminal device (MT), remote station, remote terminal device, mobile device, user terminal device, terminal device, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a 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 that provides sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D). For example, a cellular phone and a car communicate with each other using sidelink signals. Cellular phones and smart home devices communicate with each other without relaying the communication signal through a base station.

[0038] The network device in the embodiments of the present application may be a device for communicating with a terminal device. The network device may also include an access network device. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The access network device may also be referred to as a radio access network device or a base station. The access network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. Access network equipment can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (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. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in D2D, V2X, or machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the access network equipment.

[0039] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0040] The communication equipment involved in a wireless communication system can include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented by devices, that is, core network elements are core network devices. It is understood that core network devices can also be a type of network equipment.

[0041] The core network elements in the embodiments of the present application may include network elements that process and forward user signaling and data. For example, the core network equipment may include core network access and mobility management function (AMF), session management function (SMF), user plane gateway, location management function (LMF) and other core network equipment. Among them, the user plane gateway may be a server with functions such as mobility management, routing, and forwarding of user plane data, generally located on the network side, such as a serving gateway (SGW) or a packet data network gateway (PGW) or a user plane network element function entity (UPF). Of course, the core network may also include other network elements, which are not listed here one by one.

[0042] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0043] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0044] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0045] Zero-power communication technology

[0046] In recent years, the application of zero-power devices has become more and more widespread. During the standardization discussion process, the zero-power Internet of Things can also be called the ambient power enabled internet of things (A-IoT) or the ambient internet of things (A-IoT). In some technical literature, it is also called the passive IoT. A-IoT devices can refer to IoT devices that use various environmental energies, such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other environmental energies to drive themselves. Such devices may have no energy storage capacity, or may have very limited energy storage capacity (such as using capacitors with a capacity of tens of uF). Compared with IoT devices in related technologies, A-IoT devices have many advantages such as no conventional battery, no maintenance, small size, low complexity, low cost, and long life cycle.

[0047] Zero-power communication can utilize energy harvesting and backscattering communication technologies. A zero-power communication network consists of a network device 110 and a terminal device 120, as shown in Figure 2. Network device 110 can be used to send wireless power signals and downlink communication signals to terminal device 120, as well as receive backscattered signals from terminal device 120. Terminal device 120 can be, for example, a zero-power device.

[0048] In some implementations, the terminal device 120 includes an energy harvesting module 121, a backscatter communication module 122, and a low-power computing module 123. In other cases, the terminal device 120 may also include a sensor 124 for collecting external information (e.g., ambient temperature, ambient humidity, etc.). In other cases, the terminal device 120 may also include a memory 125 for storing some information (e.g., external information collected by the above sensors, or item identification, etc.).

[0049] The energy harvesting module 121 is used to harvest energy. In some implementations, energy can be harvested via a wireless power supply signal transmitted by a network device. The wireless power supply signal can be a radio frequency (RF) signal transmitted by the network device. Therefore, the energy harvesting module is also referred to as an RF power harvesting module.

[0050] FIG2 shows a possible structure of an energy harvesting module. As shown in FIG2 , the energy harvesting module 121 can harvest the energy of the spatial electromagnetic waves of the radio frequency signal based on the principle of electromagnetic induction, and store the harvested energy in the capacitor C, which is the process of charging the capacitor C. When the charging process of the capacitor C is completed, the capacitor C can begin to discharge to provide energy for the operation of the terminal device. For example, the discharge of the capacitor C can be used to drive the terminal device to perform low-power demodulation of the data sent by the network device. For another example, the discharge of the capacitor C can be used to drive the terminal device to modulate the data to be sent. For another example, the discharge of the capacitor C can be used to drive the sensor of the terminal device to collect data. For another example, the discharge of the capacitor C can be used to drive the terminal device to read the data in the memory 125, etc.

[0051] The backscatter communication module 122 is used for backscatter communication between the terminal device and the network device. The following describes the backscatter communication principle of an embodiment of the present application in conjunction with FIG3 . Referring to FIG3 , the terminal device 120 receives the wireless signal transmitted by the network device 110 and modulates the wireless signal to carry the information to be transmitted. Finally, the modulated signal is radiated from the antenna. This information transmission process is called backscatter communication. Backscatter communication and load modulation are inseparable. Load modulation adjusts and controls the circuit parameters of the terminal device's oscillation circuit according to the rhythm of the data stream, causing parameters such as the impedance of the terminal device to change accordingly, thereby completing the modulation process. Load modulation technology mainly includes two methods: resistive load modulation and capacitive load modulation. In resistive load modulation, a resistor is connected in parallel to the load, and the resistor is turned on or off based on the control of the binary data stream, as shown in FIG4 . The on and off of the resistor causes a change in the circuit voltage, thereby implementing amplitude-shift keying (ASK) modulation, that is, signal modulation and transmission are achieved by adjusting the amplitude of the backscatter signal of the terminal device. Similarly, in capacitive load modulation, the resonant frequency of the circuit can be changed by switching the capacitor on and off, realizing frequency-shift keying (FSK) modulation, that is, the modulation and transmission of the signal is achieved by adjusting the operating frequency of the backscattered signal of the terminal device.

[0052] As mentioned above, a terminal device can implement backscatter communication by modulating the incoming signal (i.e., the signal sent by the network device) using load modulation. Therefore, terminal devices in backscatter communication generally have the following advantages.

[0053] Advantage 1: Since the terminal device does not need to actively transmit signals, there is no need to construct a complex RF path. For example, the RF path can be free of components such as power amplifiers (PAs) and RF filters, thus reducing the cost and size of the terminal device.

[0054] The second advantage is that since the terminal device does not need to actively generate high-frequency signals, a high-frequency crystal oscillator is not required, thereby reducing the cost and size of the terminal device.

[0055] Advantage three: Since the terminal device can use backscatter technology to communicate with the network device, the terminal device consumes less energy during communication and does not even need to consume its own energy.

[0056] It's no surprise that zero-power communication, with its significant advantages such as extremely low cost, zero power consumption, and small size, can be widely applied across various industries. For example, zero-power communication can be applied to vertical industries such as logistics, smart warehousing, smart agriculture, energy and power, and the Industrial Internet. Furthermore, zero-power communication can be applied to personal applications such as smart wearables and smart homes.

[0057] Classification of Zero-Power Devices

[0058] In some scenarios, zero-power devices can be divided into three categories based on their energy sources and energy usage: passive zero-power devices, semi-passive zero-power devices, and active zero-power devices.

[0059] 1. Passive zero-power device.

[0060] Passive zero-power devices generally do not require built-in batteries. When a zero-power device approaches a network device, it is within the near field formed by the radiation of the network device's antenna. 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 achieve demodulation of the received signal and / or modulation and encoding of the transmitted signal. In some implementations, the above-mentioned passive zero-power device can be an electronic tag, and accordingly, the network device can be a reader of a (radio frequency identification, RFID) system, which is used to read the content in the electronic tag and / or to change the content in the electronic tag.

[0061] It can be seen that the passive zero-power device does not require a built-in battery to drive either the forward link or the reverse link, and is a truly zero-power device.

[0062] Passive zero-power devices do not require batteries, and their RF and baseband circuits are very simple. For example, they do not require low-noise amplifiers (LNAs), PAs, crystal oscillators, or analog-to-digital converters (ADCs). Therefore, they have many advantages, such as small size, light weight, very low price, and long service life.

[0063] 2. Semi-passive zero-power device.

[0064] The semi-passive zero-power device itself does not have a conventional battery installed, but can use the energy collection module 121 to collect radio wave energy, or use the solar energy / light energy / thermal energy / kinetic energy collection module to collect energy, and store the collected energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can power the zero-power device to realize the demodulation of the received signal and / or the modulation and encoding of the transmitted signal. For the backscatter link, the zero-power device can use the backscatter implementation method to transmit the signal.

[0065] It can be seen that the semi-passive zero-power device does not require a built-in battery to drive either the forward link (downlink, the link from the network device to the zero-power device) or the reverse link (uplink, the link from the zero-power device to the network device). Although energy stored in capacitors is used in operation, the energy comes from the radio energy collected by the energy harvesting module, making it a truly zero-power device.

[0066] Semi-passive zero-power devices inherit many advantages of passive zero-power devices, namely, small size, light weight, very cheap price, long service life and many other advantages.

[0067] 3. Active Zero Power Devices

[0068] Active zero-power devices can have built-in batteries (i.e., conventional batteries, such as dry batteries, rechargeable lithium batteries, etc.). The battery can power the zero-power device (for example, the low-power chip circuit that drives the zero-power device) to achieve demodulation of the received signal, and / or modulation and encoding of the transmitted signal. However, when the zero-power device uses backscattering technology to communicate, the zero-power device does not need to consume battery energy. Therefore, for this type of zero-power device, "zero power consumption" is mainly reflected in the scenario where the terminal device uses backscattering technology to communicate. Although the active zero-power device uses a battery, due to the sampling of ultra-low power communication technology, the power consumption is very low, so the battery life can be greatly improved compared to the existing technology.

[0069] In some implementations, the active zero-power device can be an electronic tag, and the network device can be an RFID reader / writer. In this case, the internal battery can power the RFID chip within the zero-power device, thereby increasing the read / write distance between the RFID reader / writer and the electronic tag. Furthermore, the internal battery can power the RFID chip within the zero-power device, thereby shortening the latency between the RFID reader / writer and the electronic tag, thereby improving communication reliability.

[0070] Based on the transmitter type, zero-power devices can be divided into three categories, including the following types: zero-power devices based on backscattering, zero-power devices based on active transmitters, and zero-power devices with both backscattering and active transmitters.

[0071] 1) Zero-power devices based on backscattering.

[0072] These zero-power devices use the aforementioned backscattering method to transmit uplink data. They lack active transmitters, only backscattering transmitters. Therefore, when these devices transmit data, they require network equipment to provide a carrier, which they then use to perform backscattering to achieve data transmission.

[0073] 2) Zero-power devices based on active transmitters.

[0074] These zero-power devices use active transmitters with active transmission capabilities for uplink data transmission. Therefore, when sending data, these zero-power devices can use their own active transmitters to send data without the need for network equipment to provide a carrier. Examples of active transmitters suitable for zero-power devices include ultra-low-power ASK and ultra-low-power FSK transmitters. Based on current implementations, these transmitters can reduce overall power consumption to 400-600uW when transmitting a 100uW signal.

[0075] 3) Zero-power devices that have both backscatter and active transmitters.

[0076] This type of terminal device supports both backscatter and active transmitters. The terminal device can determine which uplink signal transmission method to use: backscatter or active transmitter, based on various conditions (such as battery life and available ambient energy) or based on network device scheduling.

[0077] Low-power IoT based on cellular networks

[0078] The cellular Internet of Things (IoT) is booming. 3GPP has standardized IoT technologies such as narrowband IoT (NB-IoT), machine-type communication (MTC), and reduced capability (RedCap). However, many IoT communication requirements remain unmet using existing technologies, including demanding communication environments, the need for extremely small terminal devices, and extremely low costs. These requirements are explained below.

[0079] For example, some IoT scenarios may face extreme environments such as high temperature, extremely low temperature, high humidity, high voltage, high radiation, or high-speed movement. Examples include ultra-high voltage substations, high-speed train track monitoring, environmental monitoring in high-altitude cold regions, and industrial production lines. In these scenarios, existing IoT terminals will not function due to the operating environment limitations of conventional power supplies. Furthermore, extreme operating environments are not conducive to IoT maintenance, such as battery replacement.

[0080] For example, certain IoT communication scenarios, such as food traceability, commodity distribution, and smart wearables, require terminals to be extremely small for ease of use. For example, IoT terminals used for commodity management in the distribution process often take the form of electronic tags, embedded in product packaging in a very compact form factor. Another example is lightweight wearable devices that can meet user needs while improving the user experience.

[0081] For example, many IoT communication scenarios require IoT terminals to be sufficiently low-cost to enhance their competitiveness compared to alternative technologies. For example, in logistics or warehousing scenarios, to facilitate the management of large quantities of circulating items, IoT terminals can be attached to each item. Communication between the terminal and the logistics network enables precise management of the entire logistics process and lifecycle. These scenarios require IoT terminals to be sufficiently competitively priced.

[0082] In addition, with the increase in 5G industry applications, the types of connected objects and application scenarios will become more and more, and there will be higher requirements for the price and power consumption of communication terminals. The application of battery-free, low-cost passive IoT devices will become a key technology for cellular IoT, enriching the types and number of 5G network connection terminals and truly realizing the interconnection of all things.

[0083] In response to the above needs, in order to cover these unmet IoT communication needs, cellular networks also need to develop ultra-low-cost, extremely small-size, battery-free / maintenance-free IoT, and the environmental IoT can just meet this need.

[0084] Based on the discussion of A-IoT application scenarios in 3GPP system architecture (SA) 1, A-IoT can be used in at least the following four scenarios.

[0085] Scenario 1: Object recognition, such as logistics, production line product management, and supply chain management;

[0086] Scenario 2: Environmental monitoring, such as temperature, humidity, and harmful gas monitoring in working and natural environments;

[0087] Scenario 3: Positioning, such as indoor positioning, intelligent object search, and production line item positioning;

[0088] Scenario 4: Intelligent control, such as intelligent control of various electrical appliances in smart homes (turning on and off air conditioners, adjusting temperature), and intelligent control of various facilities in agricultural greenhouses (automatic irrigation and fertilization).

[0089] A-IoT devices

[0090] In NR and Wi-Fi systems, the battery-free nature and low cost of devices enable low-cost, large-scale deployment and maintenance-free IoT devices. Current standards are exploring how to support ambient energy-based IoT devices, known as A-IoT devices, in NR and Wi-Fi systems. A-IoT devices operate by harvesting ambient energy from sources such as wireless signals, solar energy, and thermal energy. These devices are similar to passive or semi-passive devices in zero-power communications.

[0091] 3GPP's RAN has conducted research on A-IoT devices, broadly classifying them into three types: A-device (A), B-device (B), and C-device (C). Each type of A-IoT device has its own level of complexity and communication capabilities. These are described below.

[0092] Device A does not have the ability to store energy and cannot send independent signals, that is, it uses backscatter transmission.

[0093] Device B has energy storage capabilities and cannot send independent signals, that is, it adopts the backscattering transmission method and can use the stored energy to amplify the backscattered signal.

[0094] Device C has energy storage capabilities and can send independent signals, that is, it has active transmission capabilities.

[0095] Device A has the lowest complexity and power consumption, reaching as low as 1μW. However, its communication range is limited, typically only a few meters. Device A requires a carrier signal from a network device for backscattering transmission. Device C typically has a large capacitor to store energy from the environment, consumes several hundred μW, can support active signal transmission, and has a longer communication range. Because device C can actively transmit, it does not require a carrier signal from a network device. Device B's complexity and power consumption are between those of devices A and C.

[0096] In addition, zero-power terminals can also support various types of environmental energy harvesting, such as radio frequency, solar energy, thermal energy, mechanical energy, etc. Among them, zero-power terminals based on radio frequency energy harvesting may require the network to provide radio frequency power signals.

[0097] In some embodiments, the A-IoT device types may include at least: a first type of A-IoT device and a second type of A-IoT device.

[0098] For Class I A-IoT devices, the following requirements must be met: peak power consumption of ~1μW (i.e., peak power consumption is less than 1μW). Class I A-IoT devices have energy storage capabilities. The initial sampling frequency offset is 10X ppm. Class I A-IoT devices do not have uplink and downlink power amplifiers. Class I A-IoT devices transmit uplink transmissions by backscattering an external carrier.

[0099] Category 2 A-IoT devices may meet the following requirements: peak power consumption is less than or equal to a few hundred μW ≤ (a few hundred μW peak power consumption). Category 2 A-IoT devices have energy storage capabilities. Category 2 A-IoT devices have an initial sampling frequency offset of 10X ppm. Category 2 A-IoT devices may be configured with uplink and / or downlink power amplifiers. Category 2 A-IoT devices may generate uplink transmissions internally within the A-IoT device, i.e., actively transmit, or send uplink transmissions by backscattering an external carrier.

[0100] Figures 5 and 6 are example diagrams of two A-IoT deployment scenarios / topologies.

[0101] The topology structure shown in FIG5 may be referred to as topology 1 or topology structure 1. The scenario shown in FIG5 may be referred to as deployment scenario 1 with topology 1.

[0102] Topology 1 corresponds to a bidirectional relationship between the base station and the A-IoT device. The base station and the A-IoT device directly communicate bidirectionally via signaling and / or data. The base station sending to the A-IoT device and the base station receiving the A-IoT device may be two different base stations.

[0103] The topology shown in FIG6 may be referred to as topology 2 or topology 2. The scenario shown in FIG6 may be referred to as deployment scenario 2 with topology 2.

[0104] Topology 2 includes: a bidirectional relationship between the BS and the intermediate node, and a bidirectional relationship between the intermediate node and the A-IoT device. Among them, the A-IoT device and the intermediate node can communicate bidirectionally. The intermediate node can transfer signaling and / or data between the BS and the A-IoT device. The intermediate node can be a terminal device under network control. Exemplarily, the intermediate node can be a relay, an integrated access and backhaul (IAB) node, a UE, a repeater, etc.

[0105] Currently, the R19 A-IoT research project primarily considers two types of services: device-terminated (DT) and device-originated–device-terminated triggered (DO-DTT). DT primarily involves instructing an A-IoT terminal to perform specific actions via downlink commands. For example, in a smart home scenario, a "turn on the air conditioner" command is issued to an A-IoT device, causing the A-IoT device to perform the corresponding operation. DO-DTT primarily involves instructing an A-IoT device to report information via downlink commands. Typical scenarios include warehouse inventory or sensor sensing, for example, triggering several zero-power tags to report their IDs or sensor data.

[0106] Considering the potentially large number of A-IoT devices in the aforementioned scenarios, especially in DO-DTT services where all stored goods are affixed with zero-power tags, the challenge is how to report information from these numerous zero-power tags while minimizing conflicts. The slot-based Aloha mechanism in RFID can serve as a baseline.

[0107] For example, Figure 7 shows the inventory mechanism in existing RFID systems, namely the slot-based aloha mechanism. Although this is a slot-based mechanism, the length, start, and end positions of each slot are not fixed due to the asynchronous nature of the RFID system. The start and end positions of each slot within an inventory round are actually defined by the query and query request (QueryRep (QueryRepeat)) instructions. For example, in Figure 7, slot 0 represents the period from the end of the reader (which can be understood as the base station or intermediate node in the A-IoT) sending a Query instruction to the end of the next QueryRep instruction. Thereafter, the start and end points of each slot are the end times of the QueryRep instructions for the previous and current slots. In other words, each QueryRep sent by the reader indicates the start of a new slot and the end of the current slot. It should be noted that the end position of the last slot of an inventory round can be indicated by the Query instruction of the next inventory round, which is the end time of the Query request and also the start position of the starting slot of the next inventory round. The following describes the inventory process shown in FIG7 .

[0108] First, the reader sends a select command. The select command is used to determine the tag set for inventory. For example, if there are a large number of tags in the warehouse, the select command is needed to determine the tags to be counted. That is, when the tag receives the select command, it will determine whether to participate in the inventory. After the select command, the reader sends a Query command, which includes a Q value. After the tag to be counted obtains the Q value, it will generate a random integer between 0 and (2^Q-1), such as a counter. Thereafter, each time a QueryRep command is received, that is, each time a new slot is started, the counter of each tag will be reduced by 1. When the counter of the tag is reduced to 0, it can be accessed in the corresponding slot. For example, in Figure 7, the counter generated by tag a is 0, so it can be directly accessed in slot 0. The counter generated by tags b and c is 2, and it will need to receive two QueryReps before it will be reduced to 0, that is, in time slot 2. Therefore, tags b and c are accessed in time slot 2. It's understandable that the initial value of the counter also corresponds to the index of a slot within an inventory round (assuming the slot index starts at 0). That is, an inventory round consists of 2^Q slots, indexed from 0 to (2^Q - 1). In summary, different tags are accessed in different slots by randomly generating counter values.

[0109] When a tag accesses a slot, for example, tag a accesses slot 0 in Figure 7, tag a first sends a random sequence RN16 of length 16 to the reader as a temporary identifier. After receiving RN 16, the reader feeds back a Response to tag a. The Response includes the same RN 16. If the RN16 received by tag a is consistent with the RN 16 sent previously, tag a sends an EPC (Electronic Product Code) to the reader. After receiving the EPC, the reader sends a Queryrep. This signaling is used to indicate to tag a that the EPC has been received and that tag a's inventory has been successful. It is also used to indicate to all UEs that their respective counter values ​​should be reduced by 1, that is, a new slot should be started, and other tags can access the new slot. It should be noted that during the above-mentioned tag a access process, if there is signaling loss or transmission error, the inventory of tag a fails. For example, if tag a sends RN 16 to the reader and the reader does not receive RN 16, the inventory of tag a fails and the tag a can only wait for the next inventory round, receive the Query command, regenerate the counter value based on the Q value, and report the information again in the next inventory round.

[0110] Because the counter values ​​generated by each tag between 0 and (2^Q-1) are random, some values ​​are not selected by any tag, and no tag will report information in the corresponding slot, such as slot 1 in Figure 7. Conversely, when multiple tags happen to select the same counter value, they will report information in the same time slot. In this case, a collision occurs, and the reader cannot identify the RN 16 of any tag. This is because the waveform received by the reader is a superposition of multiple random sequences, and there is no designed orthogonality between multiple RN 16s. Therefore, the tags that collide cannot be accessed, and the inventory fails. All inventory rounds need to wait until the next round. For example, in Figure 7, tags b and c both report RN16 in slot 2, so a collision occurs, and both need to wait until inventory round 2 to report information.

[0111] Each time the reader sends a Query, it indicates the end of the previous inventory round and the start of a new inventory round. For example, in Figure 7, in inventory round 2, the tags that were not successfully inventoried in inventory round 1 will continue to be inventoried. Between inventory rounds, the Q value indicated in the Query can be adjusted. For example, if the reader finds that there are many time slots without tags accessing in the previous inventory round, the Q value will be reduced in the next round. On the contrary, if the reader finds that there are many collisions in the previous round, the Q value will be increased in the next round. For example, at the beginning of each inventory round, relative to the previous inventory round, the reader can add or subtract 1 to the Q value, or keep it unchanged, or set it to any allowed value, and then indicate it to the tag through a Query. For example, when Q=0, the entire inventory process ends.

[0112] Transmission characteristics of A-IoT carriers

[0113] The carrier wave (CW) waveform used for reflection from A-IoT devices can be considered single-tone or multi-tone. A single-tone carrier wave can be a single-frequency sine wave, that is, a radio wave with only a single frequency, with an impact at a certain frequency point in the frequency domain. A multi-tone carrier wave is a radio wave with at least two frequencies mixed together, that is, a time domain waveform composed of at least two different single-frequency sine waves. When a CW is sent from the carrier providing endpoint (also called a carrier wave node) to the A-IoT device (such as a tag), the device will modulate the data information onto the CW and then send it to the reader via backscattering.

[0114] For both topologies, the CW can be provided by the base station, an intermediate node (e.g., a UE), or a third node (CWN) (also called an external node) in addition to the base station and the intermediate node UE. Furthermore, the transmission of CWs in the downlink (DL) or uplink (UL) of the FDD band is an issue that requires further discussion.

[0115] In topology 1 shown in Figure 8, considering the uplink and downlink resources where CWN, CW, and reflected waves are located, the following solutions can be considered:

[0116] Case 1-1: The base station provides a CW, which is transmitted in the DL spectrum.

[0117] Case 1-2: The base station provides a CW, which is transmitted in the UL spectrum.

[0118] Case 1-3: An external node provides a CW, which is transmitted in the DL spectrum.

[0119] Case 1-4: An external node provides a CW, which is transmitted in the UL spectrum.

[0120] In topology 2 shown in Figure 9, considering the CW providing nodes, uplink and downlink resources where the CW and reflected waves are located, the following solutions can be considered:

[0121] Case 2-1 (case 1-1): The intermediate node UE provides the CW, which is transmitted in the DL spectrum.

[0122] Case 2-2 (case 1-2): The intermediate node UE provides a CW, which is transmitted in the UL spectrum.

[0123] Case 2-3 (case 1-3): An external node provides a CW, which is transmitted in the DL spectrum.

[0124] Case 2-4 (case 1-4): An external node provides a CW, which is transmitted in the UL spectrum.

[0125] Uu port uplink power control

[0126] During uplink transmission on the NR Uu port, the UE needs to perform power control when sending data to ensure that the received power of the uplink signals sent by each UE is roughly at the same level when they arrive at the base station, thereby avoiding mutual interference. In other words, UEs far from the base station need to use higher transmit power due to larger path losses. Conversely, UEs closer to the base station need to use lower transmit power due to smaller path losses. If a nearby UE uses higher transmit power, the base station will not be able to correctly receive the uplink transmission of the distant UE, which is called the near-far effect.

[0127] Specifically, for a certain UE, its uplink transmission power is determined mainly through two methods: one is open-loop power control, and the other is closed-loop power control.

[0128] For example, the transmit power P of the UE can satisfy: P = min(P0 + α * PL + offset, Pcmax) dBm. Among them, Pcmax is the maximum transmit power of the UE, P0 + α * PL is the power determined based on open-loop power control, P0 is the target receive power, α is the path loss compensation factor, and P0 and α are configured by the network, for example, through radio resource control (RRC) signaling. Therefore, also limited by the RRC signaling configuration, the transmit power determined based on open-loop power control is often configured once and used for a long period of time, and it is not possible to frequently adjust the values ​​of P0 and α to control the transmit power of the UE. In addition, open-loop power control requires the UE to measure the path loss (PL). For example, the UE obtains the downlink receive power by measuring the pilot or channel state information reference signal (CSI-RS) in the downlink synchronization signal / PBCH block (SSB). The path loss PL is obtained by subtracting the measured downlink receive power from the transmit power indicated to the UE by the base station.

[0129] To more quickly adjust the UE's transmit power, the base station can also adjust the UE's transmit power through closed-loop power control, that is, by indicating a power offset to the UE. The power offset, also known as transmit power control (TPC), is indicated by the base station to the UE via downlink control information (DCI). Specifically, the power offset operates in two ways: one is that the UE obtains a power offset after receiving the DCI and directly uses the offset and the power P0 + α*PL determined based on open-loop power control to calculate the final transmit power according to the above formula P = min(P0 + α*PL + offset, Pcmax) dBm. The other is that the power offset obtained by the UE after receiving the DCI is recorded as offset2. Assuming that power offset1 is the power offset received last time, the UE first calculates offset = offset1 + offset2, and then calculates the final transmit power based on the offset and the power P0 + α*PL determined based on open-loop power control according to the formula P = min(P0 + α*PL + offset, Pcmax) dBm. The difference between the two methods described above is that in the first method, the power offset is applied directly to the power determined by open-loop power control, while in the second method, the power offset is first applied to the last received power offset and then to the power determined by open-loop power control. It is understood that in the second method, the UE needs to store the last received power offset. The first method described above can be called non-accumulation closed-loop power control, while the second method can be called accumulation-based closed-loop power control.

[0130] In the A-IoT scenario, how to perform power control is an urgent problem that needs to be solved.

[0131] FIG10 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0132] The method shown in FIG. 10 may be performed by the first device and the network device.

[0133] The first device can send a first carrier, and the reflected wave corresponding to the first carrier (also referred to as a reflected signal or a modulated waveform) can be used by the first terminal device to send a data signal to the network device. The first carrier can be the incident carrier of the first terminal device, and the first terminal device can backscatter the reflected signal through the incident carrier. Exemplarily, the first terminal device can modulate the data to be sent onto the first carrier, thereby generating a reflected signal transmitted to the base station. The modulation method may include, for example, an OKK modulation method. After receiving the reflected signal, the network device decodes it to obtain the data signal sent by the first terminal device. For example, the first device may include the intermediate node described above. For another example, the first device may include the CWN described above.

[0134] Taking the topology shown in Figure 7 as an example, the network device may include a base station, the first device may include an intermediate node, and the first terminal device may include an A-IoT device.

[0135] It should be noted that the network device can be used to send and / or receive one or more of the following to the first terminal device: data service information, control information.

[0136] It should be noted that the network device may include any of the network devices described above. For example, the network device may include one or more of: a base station, a reader, and the like.

[0137] Optionally, the first device may include any of the communication devices described above. For example, the first device may include one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, a smart repeater, or a repeater. In another example, the first device may also include a network device. In other words, the method shown in FIG10 may be performed by two different network devices.

[0138] As described above, the first terminal device needs to communicate with the network device based on the carrier transmitted by the first device. For example, the first terminal device may be the zero-power device described above. In another example, the first terminal device may be an A-IoT device. In another example, the first terminal device may include a passive IoT device. In other words, the present application can be applied to passive IoT devices.

[0139] The method shown in FIG. 10 may include step S1010 .

[0140] Step S1010: A first device receives first information sent by a network device.

[0141] The first information may be related to the transmission power of the first carrier transmitted by the first device.

[0142] It is understandable that based on the first information, the transmit power control of the first carrier can be implemented. When the transmit power control is implemented on the first carrier, the reflected wave of the first carrier can also be subjected to transmit power control, thereby implementing power control (e.g., TPC) of the signal transmitted by the first terminal device to the network device.

[0143] On the one hand, if the transmission power of the first carrier provided by the first device is greater, the transmission power reflected by the first terminal device is greater, and the receiving power of the modulated waveform received by the network device is also greater. If the network device is also receiving signals from other terminal devices at the same time, then the larger transmission power will interfere with the signals sent by other terminal devices. In the case where the first terminal device and the other terminal devices include A-IoT devices, the interference can also be referred to as mutual interference between D2Rs of A-IoT devices. Since the present application can adjust the transmission power of the first carrier and thus adjust the transmission power of the first terminal device, such as reducing the transmission power of the first terminal device, the present application can avoid the above-mentioned interference caused by the excessive transmission power of the first terminal device (such as mutual interference between D2Rs of A-IoT devices).

[0144] On the other hand, the base station may receive interference from the first device. For example, when the first device sends the first carrier, the first carrier can propagate omnidirectionally in the air. After passing through paths such as direct radiation, reflection, and refraction, a part of the first carrier may reach the network device, thereby causing interference to the network device. If the transmission power of the first carrier is large, the base station will receive interference from the first device when receiving signals sent by terminal devices including the first terminal device, or will be greatly affected by the interference. In some embodiments, the interference can also be referred to as the interference suffered by the base station on the reader-to-device (R2D) link. For example, if the modulation waveform of the first terminal device may have a receiving power component corresponding to the first carrier at a certain frequency point in the frequency domain, the reception of the modulation waveform will be interfered with. Since the present application can adjust the transmission power of the first carrier, such as reducing the transmission power, the present application can avoid the above-mentioned interference caused by the excessive transmission power of the first carrier (such as the interference suffered by the base station on the R2D link).

[0145] On the other hand, in some scenarios, the first terminal device needs to have a relatively high transmit power. For example, if the first terminal device is far away from the network device, due to path loss, the first terminal device's transmit power must be relatively high to allow the network device to receive the corresponding signal. Because the present application can adjust the transmit power of the first carrier and thus adjust the transmit power of the first terminal device, for example, by increasing the transmit power of the first terminal device, the present application can improve the accuracy and reliability of the signal transmitted by the first terminal device in scenarios such as those with large path loss.

[0146] On the other hand, if there are multiple carrier providing nodes, and the multiple carrier providing nodes include the first device, then by controlling the transmission power of the first carrier, the problem of the first device transmitting the first carrier with excessive power causing interference to other carrier providing nodes can be avoided.

[0147] In summary, by controlling the power of the first carrier transmitted by the first device, the accuracy and reliability of signals transmitted and received by each communication device can be improved.

[0148] In some embodiments, the first information may be used to indicate multiple pieces of information, or the first information may include multiple pieces of information. Therefore, the first information may also be referred to as a first information set.

[0149] In some embodiments, the first information may include one or more of the following information: initial information, second information, offset information, and waveform information, which are described below.

[0150] The initial information may be used to indicate the initial transmission power of the first carrier. In other words, the initial information may indicate the initial transmission power used by the first device when transmitting the first carrier. In this application, the initial transmission power may be represented by P initial express.

[0151] The second information may be used to indicate the maximum transmit power of the first carrier. In other words, the first information may indicate the maximum transmit power that the first device can use when transmitting the first carrier. In this application, the maximum transmit power can be expressed by P cmax express.

[0152] The offset information may be used to indicate an offset between the actual transmit power of the first carrier and the initial transmit power, where the offset may also be referred to as a compensation amount.

[0153] The actual transmit power of the first carrier may be determined based on one or more of the following: an initial transmit power, a maximum transmit power, and an offset.

[0154] Optionally, when actually transmitting the first carrier, the first device may increase or decrease the transmission power based on the initial transmission power. The increased or decreased transmission power may be determined based on an offset. For example, the offset may be represented by an offset. The actual transmission power P may be P initf +offset. The offset can be a positive value, a negative value, or 0. When the offset is a positive value, the actual transmit power can be greater than the initial transmit power. When the offset is a negative value, the actual transmit power can be less than the initial transmit power. When the offset is 0, the actual transmit power can be equal to the initial transmit power.

[0155] Optionally, the actual transmit power may be subject to the maximum transmit power constraint. In other words, if the calculated transmit power is greater than the maximum transmit power, the actual transmit power may be the maximum transmit power; if the calculated transmit power is less than or equal to the maximum transmit power, the actual transmit power may be P. For example, the actual transmit power P may satisfy: P = min(P initial +offset,P cmax ).

[0156] It should be noted that the offset may not exist, or the offset may be equal to 0, or the first information may not include the offset information. For example, in the case where the network device has not yet determined the offset or the offset information, the offset may not exist or be equal to 0, or the first information may not include the offset information. In this case, the actual transmit power P may satisfy: P = min (P initial ,P cmax ).

[0157] The waveform information may be used to indicate the waveform of the first carrier. The waveform of the first carrier may include, for example, one or more of the following: a single-frequency sinusoidal wave, an orthogonal frequency division multiplexing (OFDM) modulated waveform, or multiple single-frequency sinusoidal waves. The multiple single-frequency sinusoidal waves may be mixed by a mixer and then transmitted.

[0158] It should be noted that the first information may not include one or more of the following: initial information, second information, offset information, and waveform information. If the first information does not include one or more of the above information, the corresponding information may be a default value. The default value may be predefined or preconfigured. For example, the default value of the initial transmit power may be a predefined or preconfigured value. For another example, the default value of the waveform of the first carrier may be predefined or preconfigured as a single-frequency sine wave.

[0159] The following describes in detail the method for determining the offset information or offset amount.

[0160] In some embodiments, the offset information or the offset amount may be determined by one or more of the following: a first power, a second power.

[0161] The first power can be obtained by the network device measuring the signal and / or waveform sent by the first terminal to the network device.

[0162] Optionally, the first power may include one or more of the following: power corresponding to a signal and / or waveform actively sent by the first terminal device to the network device; and power corresponding to a signal and / or waveform sent by the first terminal device via backscattering. The signal and / or waveform sent by the first terminal device via backscattering may be a signal and / or waveform sent by the first terminal device via a reflected wave of the first carrier.

[0163] It can be understood that when the first power includes the power corresponding to the signal and / or waveform sent by the first terminal device via backscattering, the offset can be determined based on the historical transmission power of the first terminal device via backscattering, so that the subsequent transmission power of the signal / waveform sent by the first terminal device via backscattering can be adaptively adjusted, thereby ensuring the accuracy of backscattering communication while avoiding interference of backscattering communication on other communication devices.

[0164] It should be noted that the signal sent by the first terminal device to the network device may include one or more of the following: a preamble, data information, control information, a pilot signal, etc. In other words, the first power can be determined by measuring one or more of the following signals sent by the first terminal device to the network device: a preamble, data information, control information, a pilot signal, etc.

[0165] The first power may correspond to the power of the first path. The first path may include a path from the first terminal device to the network device. For example, the first path may include a D2R link.

[0166] It should be noted that the first path may include one or more paths. That is, the signal / waveform sent by the first terminal device may reach the network device via one or more paths. The network device may determine the first power by measuring the signal / waveform transmitted along the one or more paths. The paths may include, for example, direct paths, reflected paths, or refracted paths.

[0167] For example, when the network device receives a signal sent from the first terminal device on the first path, the network device can measure the received signal on the first path to obtain the received power on the first path. Based on the received power on the first path, the network device can send first information to the first device. The first information may include offset information. The offset indicated by the offset information may be offset1. The transmit power P determined by the first device may satisfy: P = min(P initial +offset1,P cmax )dBm.

[0168] The second power may be obtained by the network device measuring a signal and / or waveform sent by the first device and received by the network device.

[0169] It is understood that the signal and / or waveform used to determine the second power can be sent by the first device to the network device, or can be sent by the first device to a device other than the network device. The other device can be, for example, the first terminal device. For example, the network device can measure the first carrier sent by the first device to the first terminal device. For example, when the first device sends the first carrier to the first terminal device, a portion of the first carrier may be scattered to the network device, thereby being received by the network device, thereby obtaining the second power.

[0170] When the offset is determined by the second power, the determination of the transmit power of the first carrier can take into account the interference received by the network device on the R2D link, thereby determining a suitable offset to enable the network device to correctly receive signals sent by other communication devices other than the first communication device.

[0171] In some embodiments, the second power can be obtained by measuring the frequency of a single-frequency sine wave corresponding to the first carrier. For example, the first carrier can correspond to a single-frequency sine wave, that is, the waveform of the first carrier is a single-frequency sine wave. In this case, the network device can measure the frequency of the single-frequency sine wave to obtain the second power.

[0172] In some embodiments, the waveform of the first carrier is a plurality of single-frequency sinusoidal waves, and the plurality of single-frequency sinusoidal waves may correspond to a plurality of frequency points. In this case, the second power may be obtained by measuring the received power of the plurality of frequency points.

[0173] This application does not limit the method for determining the second power based on the received powers of multiple frequencies. For example, the second power can be: the sum of the received powers of multiple frequencies, the maximum value of the received powers of multiple frequencies, the minimum value of the received powers of multiple frequencies, or the average value of the received powers of multiple frequencies.

[0174] The second power may correspond to the power of the second path. The second path may be a path from the first device to the network device.

[0175] Optionally, the second path may include one or more paths. That is, the signal / waveform sent by the first device may reach the network device via one or more paths. By measuring the signal / waveform transmitted along the one or more paths, the network device may determine the second power. Paths may include, for example, direct paths, reflected paths, or refracted paths.

[0176] Exemplarily, in the case that the second path includes multiple paths, the second power may be a mixture of powers of the first carrier reaching the network device via the multiple paths.

[0177] For example, when the network device receives the first carrier transmitted by the first device on the second path after passing through multiple paths to reach the network device, the network device can measure the received signal on the second path to obtain the transmit power of the carrier on the second path. Based on the transmit power of the carrier on the second path, the offset offset2 can be determined. The network device can send the first information to the first device. The offset information included in the first information can indicate offset2. The first node device can determine that the transmit power P satisfies: P = min(P initial +offset2,P cmax )dBm.

[0178] Figure 11 is a schematic diagram of a first path and a second path. As shown in Figure 11, the first path may be a path from a first terminal device to a base station; the second path may be a path from the first device to the base station.

[0179] It should be noted that the network device may also determine the offset in combination with the first power and the second power. It is understandable that, based on the first power and the second power, the offset determined by the network device may take into account more factors, thereby making the offset value more consistent with actual communication scenarios.

[0180] For example, when the network device receives a signal sent from the first terminal device on the first path and a first carrier sent by the first device on the second path and reaching the network device through multiple paths, the network device can measure the received signals on the first path and the second path to obtain the transmission power on the first path and the second path. Based on the transmission power on the first path and the second path, the transmission power offset offset3 can be determined. The offset information in the first information sent by the network device to the first device can indicate offset3. The transmission power P determined by the first device can satisfy: P=min(P initial +offset3,P cmax )dBm.

[0181] The following describes a method in which the first device determines an offset based on the offset information.

[0182] In some embodiments, the offset information may indicate a first offset. The offset may be calculated based on the first offset. For example, the offset may be equal to the first offset.

[0183] Optionally, the first offset may be a value indicated in the offset information currently indicated by the network device. That is, the offset may be calculated based on the indication of the current offset information.

[0184] In some embodiments, offset information historically indicated by the network device may be used to indicate the second offset, and the offset amount may be determined based on the first offset and the second offset. For example, the first offset may be the offset information currently indicated by the network device. That is, the offset amount may be determined based on the historical offset information and the current offset information indicated by the network device.

[0185] In some embodiments, the first information may be carried by one or more of the following: a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), RRC signaling, and a media access control element (MAC CE). When the first information is carried by the PDCCH, the first information may also be referred to as being carried by the DCI.

[0186] For ease of understanding, the method for the first device to determine the transmit power of the first carrier is described below with reference to Example 1.

[0187] Example 1

[0188] In embodiment 1, the network device includes a base station.

[0189] When the first device receives the initial transmission power P indicated / configured by the base station initial When the offset is not received, the first device can initial, P cmax )dBm to determine the transmit power.

[0190] When the first device receives the initial transmission power P indicated by the base station initial and offset1, according to P=min(P initial +offset1,P cmax )dBm to determine the transmit power.

[0191] When the first device receives the initial transmission power P indicated by the base station initial and offset2, according to P=min(P initial +offset2,P cmax )dBm to determine the transmit power.

[0192] When the first device receives the initial transmission power P indicated by the base station initial and offset3, according to P=min(P initial +offset3,P cmax )dBm to determine the transmit power.

[0193] Wherein, offset1, offset2, and offset3 are as described above.

[0194] Optionally, when the first device receives an offset value, it can check whether it has received an offset before. For example, if an offset_ex is received before and an offset_c is received now, the first device can calculate the offset_ex and offset_c to obtain the final value of the offset. For example, offset can satisfy offset = offset_ex + offset_c, and then according to P = min (P initial +offset,P cmax )dBm to determine the transmit power.

[0195] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0196] FIG12 is a schematic structural diagram of a communication device 1200 provided in an embodiment of the present application. The communication device 1200 may be a first device and may include a receiving unit 1210.

[0197] The receiving unit 1210 is used to receive first information sent by the network device; wherein the first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

[0198] In some embodiments, the first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; offset information, used to indicate the offset between the actual transmit power of the first carrier and the initial transmit power; waveform information, used to indicate the waveform of the first carrier.

[0199] In some embodiments, the offset information is determined by one or more of the following: first power, obtained by measuring the signal and / or waveform sent by the first terminal device to the network device by the network device; second power, obtained by measuring the signal and / or waveform sent by the first device received by the network device by the network device.

[0200] In some embodiments, the first power includes one or more of the following: the power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; the power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

[0201] In some embodiments, the signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

[0202] In some embodiments, the second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

[0203] In some embodiments, the waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

[0204] In some embodiments, the second power is: the sum of the received powers of multiple frequency points; the maximum value of the received powers of multiple frequency points; the minimum value of the received powers of multiple frequency points; or the average value of the received powers of multiple frequency points.

[0205] In some embodiments, the first power corresponds to power of one or more paths; and / or the second power corresponds to power of one or more paths.

[0206] In some embodiments, the actual transmit power of the first carrier is determined by one or more of the following: an initial transmit power, an offset, and a maximum transmit power.

[0207] In some embodiments, the actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial Indicates the initial transmit power, offset indicates the offset, P cmax Indicates the maximum transmit power.

[0208] In some embodiments, the offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

[0209] In some embodiments, the offset information historically indicated by the network device is used to indicate the second offset, and the offset is calculated based on the first offset and the second offset.

[0210] In some embodiments, the offset is equal to the sum of the first offset and the second offset.

[0211] In some embodiments, the waveform of the first carrier includes one or more of the following: one or more single-frequency sinusoidal waves; orthogonal frequency division multiplexing (OFDM) modulated waveform.

[0212] In some embodiments, the first information is carried by one or more of the following: PDCCH, PDSCH, RRC signaling, and MAC CE.

[0213] In some embodiments, the first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

[0214] In some embodiments, the first terminal device includes: an A-IoT device.

[0215] In an optional embodiment, the receiving unit 1210 may be a transceiver 1430. The communication device 1200 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0216] FIG13 is a schematic structural diagram of a network device 1300 provided in an embodiment of the present application. The network device 1300 may include a sending unit 1310 .

[0217] The sending unit 1310 is used to send first information to the first device; wherein the first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

[0218] In some embodiments, the first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; offset information, used to indicate the offset between the actual transmit power of the first carrier and the initial transmit power; waveform information, used to indicate the waveform of the first carrier.

[0219] In some embodiments, the offset information is determined by one or more of the following: first power, obtained by measuring the signal and / or waveform sent by the first terminal device to the network device by the network device; second power, obtained by measuring the signal and / or waveform sent by the first device received by the network device by the network device.

[0220] In some embodiments, the first power includes one or more of the following: the power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; the power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

[0221] In some embodiments, the signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

[0222] In some embodiments, the second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

[0223] In some embodiments, the waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

[0224] In some embodiments, the second power is: the sum of the received powers of multiple frequency points; the maximum value of the received powers of multiple frequency points; the minimum value of the received powers of multiple frequency points; or the average value of the received powers of multiple frequency points.

[0225] In some embodiments, the first power corresponds to the power of one or more paths; and / or the second power corresponds to the power of one or more paths.

[0226] In some embodiments, the actual transmit power of the first carrier is determined by one or more of the following: an initial transmit power, an offset, and a maximum transmit power.

[0227] In some embodiments, the actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial Indicates the initial transmit power, offset indicates the offset, P cmax Indicates the maximum transmit power.

[0228] In some embodiments, the offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

[0229] In some embodiments, the offset information historically indicated by the network device is used to indicate the second offset, and the offset is calculated based on the first offset and the second offset.

[0230] In some embodiments, the offset is equal to the sum of the first offset and the second offset.

[0231] In some embodiments, the waveform of the first carrier includes one or more of the following: one or more single-frequency sinusoidal waves; orthogonal frequency division multiplexing (OFDM) modulated waveform.

[0232] In some embodiments, the first information is carried by one or more of the following: PDCCH, PDSCH, RRC signaling, and MAC CE.

[0233] In some embodiments, the first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

[0234] In some embodiments, the first terminal device includes: an A-IoT device.

[0235] In an optional embodiment, the sending unit 1310 may be a transceiver 1430. The network device 1300 may further include a processor 1410 and a memory 1420, as specifically shown in FIG14 .

[0236] Figure 14 is a schematic block diagram of a communication device according to an embodiment of the present application. Dashed lines in Figure 14 indicate that the unit or module is optional. Device 1400 may be used to implement the method described in the above method embodiment. Device 1400 may be a chip, a communication device, a terminal device, or a network device.

[0237] The device 1400 may include one or more processors 1410. The processor 1410 may support the device 1400 to implement the method described in the above method embodiment. The processor 1410 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0238] The apparatus 1400 may further include one or more memories 1420. The memories 1420 store programs that can be executed by the processor 1410, causing the processor 1410 to perform the methods described in the above method embodiments. The memories 1420 may be independent of the processor 1410 or integrated into the processor 1410.

[0239] The apparatus 1400 may further include a transceiver 1430. The processor 1410 may communicate with other devices or chips via the transceiver 1430. For example, the processor 1410 may transmit and receive data with other devices or chips via the transceiver 1430.

[0240] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the communication device, terminal device, or network device provided in the present application, and the program causes a computer to execute the method performed by the communication device, terminal device, or network device in each embodiment of the present application.

[0241] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device, terminal device, or network device provided in the embodiments of the present application, and the program causes a computer to execute the methods performed by the communication device, terminal device, or network device in each embodiment of the present application.

[0242] The present application also provides a computer program that can be applied to the communication device, terminal device, or network device provided in the present application, and enables a computer to execute the method performed by the communication device, terminal device, or network device in each embodiment of the present application.

[0243] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0244] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0245] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0246] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0247] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a communication device (e.g., including a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0248] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0249] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0250] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0251] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0252] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0253] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0254] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0255] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. 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 via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. 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 or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0256] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The first device receives first information sent by the network device; The first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

2. The method according to claim 1, characterized in that The first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; Offset information, used to indicate an offset between an actual transmit power of the first carrier and the initial transmit power; Waveform information, used to indicate the waveform of the first carrier.

3. The method according to claim 2, characterized in that The offset information is determined by one or more of the following: A first power is obtained by measuring, by the network device, a signal and / or waveform sent by the first terminal device to the network device; The second power is obtained by measuring, by the network device, a signal and / or a waveform received by the network device and sent by the first device.

4. The method according to claim 3, characterized in that The first power includes one or more of the following: power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; The power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

5. The method according to claim 3 or 4, characterized in that The signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

6. The method according to any one of claims 3 to 5, characterized in that The second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

7. The method according to any one of claims 3 to 5, characterized in that The waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

8. The method according to claim 7, characterized in that The second power is: The sum of the received powers of the multiple frequency points; The maximum value of the received power of the multiple frequency points; The minimum value of the received power of the multiple frequency points; or The average value of the received powers of the multiple frequency points.

9. The method according to any one of claims 3 to 8, characterized in that The first power corresponds to the power of one or more paths; and / or, The second power corresponds to power of one or more paths.

10. The method according to any one of claims 2 to 9, characterized in that The actual transmit power of the first carrier is determined by one or more of the following: the initial transmit power, the offset, and the maximum transmit power.

11. The method according to claim 10, characterized in that The actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial represents the initial transmission power, offset represents the offset, P cmax Indicates the maximum transmit power.

12. The method according to any one of claims 2 to 11, characterized in that The offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

13. The method according to claim 12, characterized in that The offset information historically indicated by the network device is used to indicate a second offset, and the offset is calculated based on the first offset and the second offset.

14. The method according to claim 13, characterized in that The offset is equal to the sum of the first offset and the second offset.

15. The method according to any one of claims 2 to 14, characterized in that The waveform of the first carrier includes one or more of the following: One or more single-frequency sine waves; Orthogonal frequency division multiplexing (OFDM) modulation waveform.

16. The method according to any one of claims 1 to 15, characterized in that The first information is carried by one or more of the following: a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a radio resource control RRC signaling, and a media access layer control element MAC CE.

17. The method according to any one of claims 1 to 16, characterized in that The first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

18. The method according to any one of claims 1 to 17, characterized in that The first terminal device includes: an environmental Internet of Things A-IoT device.

19. A wireless communication method, characterized in that: include: The network device sends first information to the first device; The first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

20. The method according to claim 19, characterized in that The first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; Offset information, used to indicate an offset between an actual transmit power of the first carrier and the initial transmit power; Waveform information, used to indicate the waveform of the first carrier.

21. The method according to claim 20, characterized in that The offset information is determined by one or more of the following: A first power is obtained by measuring, by the network device, a signal and / or waveform sent by the first terminal device to the network device; The second power is obtained by measuring, by the network device, a signal and / or a waveform received by the network device and sent by the first device.

22. The method according to claim 21, characterized in that The first power includes one or more of the following: power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; The power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

23. The method according to claim 21 or 22, characterized in that The signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

24. The method according to any one of claims 21 to 23, characterized in that The second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

25. The method according to any one of claims 21 to 23, characterized in that The waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

26. The method according to claim 25, characterized in that The second power is: The sum of the received powers of the multiple frequency points; The maximum value of the received power of the multiple frequency points; The minimum value of the received power of the multiple frequency points; or The average value of the received powers of the multiple frequency points.

27. The method according to any one of claims 21 to 26, characterized in that The first power corresponds to the power of one or more paths; and / or, The second power corresponds to power of one or more paths.

28. The method according to any one of claims 20 to 27, characterized in that The actual transmit power of the first carrier is determined by one or more of the following: the initial transmit power, the offset, and the maximum transmit power.

29. The method according to claim 28, characterized in that The actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial represents the initial transmission power, offset represents the offset, P cmax Indicates the maximum transmit power.

30. The method according to any one of claims 20 to 29, wherein: The offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

31. The method according to claim 30, wherein The offset information historically indicated by the network device is used to indicate a second offset, and the offset is calculated based on the first offset and the second offset.

32. The method according to claim 31, characterized in that The offset is equal to the sum of the first offset and the second offset.

33. The method according to any one of claims 20 to 32, characterized in that The waveform of the first carrier includes one or more of the following: One or more single-frequency sine waves; Orthogonal frequency division multiplexing (OFDM) modulation waveform.

34. The method according to any one of claims 19 to 33, wherein: The first information is carried by one or more of the following: a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a radio resource control RRC signaling, and a media access layer control element MAC CE.

35. The method according to any one of claims 19 to 34, wherein: The first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

36. The method according to any one of claims 19 to 35, wherein: The first terminal device includes: an environmental Internet of Things A-IoT device.

37. A communication device, characterized in that: The communication device is a first device, and the communication device includes: A receiving unit, configured to receive first information sent by a network device; The first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

38. The communication device according to claim 37, wherein: The first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; Offset information, used to indicate an offset between an actual transmit power of the first carrier and the initial transmit power; Waveform information, used to indicate the waveform of the first carrier.

39. The communication device according to claim 38, wherein The offset information is determined by one or more of the following: A first power is obtained by measuring, by the network device, a signal and / or waveform sent by the first terminal device to the network device; The second power is obtained by measuring, by the network device, a signal and / or a waveform received by the network device and sent by the first device.

40. The communication device according to claim 39, wherein The first power includes one or more of the following: power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; The power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

41. The communication device according to claim 39 or 40, characterized in that The signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

42. The communication device according to any one of claims 39 to 41, characterized in that The second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

43. The communication device according to any one of claims 39 to 41, characterized in that The waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

44. The communication device according to claim 43, wherein The second power is: The sum of the received powers of the multiple frequency points; The maximum value of the received power of the multiple frequency points; The minimum value of the received power of the multiple frequency points; or The average value of the received powers of the multiple frequency points.

45. The communication device according to any one of claims 39 to 44, characterized in that The first power corresponds to the power of one or more paths; and / or, The second power corresponds to power of one or more paths.

46. ​​The communication device according to any one of claims 38 to 45, characterized in that The actual transmit power of the first carrier is determined by one or more of the following: the initial transmit power, the offset, and the maximum transmit power.

47. The communication device according to claim 46, characterized in that The actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial represents the initial transmission power, offset represents the offset, P cmax Indicates the maximum transmit power.

48. The communication device according to any one of claims 38 to 47, characterized in that The offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

49. The communication device according to claim 48, characterized in that The offset information historically indicated by the network device is used to indicate a second offset, and the offset is calculated based on the first offset and the second offset.

50. The communication device according to claim 49, wherein The offset is equal to the sum of the first offset and the second offset.

51. The communication device according to any one of claims 38 to 50, characterized in that The waveform of the first carrier includes one or more of the following: One or more single-frequency sine waves; Orthogonal frequency division multiplexing (OFDM) modulation waveform.

52. The communication device according to any one of claims 37 to 51, characterized in that The first information is carried by one or more of the following: a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a radio resource control RRC signaling, and a media access layer control element MAC CE.

53. The communication device according to any one of claims 37 to 52, characterized in that: The first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

54. The communication device according to any one of claims 37 to 53, characterized in that The first terminal device includes: an environmental Internet of Things A-IoT device.

55. A network device, characterized in that include: a sending unit, configured to send first information to a first device; The first information is related to the transmission power of the first carrier sent by the first device, and the reflected carrier corresponding to the first carrier is used by the first terminal device to send the data signal to the network device.

56. The network device according to claim 55, characterized in that The first information includes one or more of the following information: initial information, used to indicate the initial transmit power of the first carrier; second information, used to indicate the maximum transmit power of the first carrier; Offset information, used to indicate an offset between an actual transmit power of the first carrier and the initial transmit power; Waveform information, used to indicate the waveform of the first carrier.

57. The network device according to claim 56, wherein: The offset information is determined by one or more of the following: A first power is obtained by measuring, by the network device, a signal and / or waveform sent by the first terminal device to the network device; The second power is obtained by measuring, by the network device, a signal and / or a waveform received by the network device and sent by the first device.

58. The network device according to claim 57, characterized in that The first power includes one or more of the following: power corresponding to the signal and / or waveform actively sent by the first terminal device to the network device; The power corresponding to the signal and / or waveform sent by the first terminal device via backscattering.

59. The network device according to claim 57 or 58, characterized in that The signal sent by the first terminal device to the network device includes one or more of the following: a preamble, data information, control information, and a pilot signal.

60. The network device according to any one of claims 57 to 59, characterized in that: The second power is obtained by measuring a single-frequency sine wave corresponding to the first carrier.

61. The network device according to any one of claims 57 to 59, characterized in that: The waveform of the first carrier is a plurality of single-frequency sinusoidal waves, the plurality of single-frequency sinusoidal waves correspond to a plurality of frequency points, and the second power is obtained by measuring the received power of the plurality of frequency points.

62. The network device according to claim 61, wherein: The second power is: The sum of the received powers of the multiple frequency points; The maximum value of the received power of the multiple frequency points; The minimum value of the received power of the multiple frequency points; or The average value of the received powers of the multiple frequency points.

63. The network device according to any one of claims 57 to 62, characterized in that: The first power corresponds to the power of one or more paths; and / or, The second power corresponds to power of one or more paths.

64. The network device according to any one of claims 56 to 63, characterized in that: The actual transmit power of the first carrier is determined by one or more of the following: the initial transmit power, the offset, and the maximum transmit power.

65. The network device according to claim 64, characterized in that The actual transmission power P of the first carrier satisfies: P=min(P initial +offset,P cmax ), where P initial represents the initial transmission power, offset represents the offset, P cmax Indicates the maximum transmit power.

66. The network device according to any one of claims 56 to 65, characterized in that: The offset information is used to indicate a first offset, and the offset is calculated based on the first offset.

67. The network device according to claim 66, characterized in that The offset information historically indicated by the network device is used to indicate a second offset, and the offset is calculated based on the first offset and the second offset.

68. The network device according to claim 67, characterized in that The offset is equal to the sum of the first offset and the second offset.

69. The network device according to any one of claims 56 to 68, characterized in that: The waveform of the first carrier includes one or more of the following: One or more single-frequency sine waves; Orthogonal frequency division multiplexing (OFDM) modulation waveform.

70. The network device according to any one of claims 55 to 69, characterized in that: The first information is carried by one or more of the following: a physical downlink control channel PDCCH, a physical downlink shared channel PDSCH, a radio resource control RRC signaling, and a media access layer control element MAC CE.

71. The network device according to any one of claims 55 to 70, characterized in that: The first device includes one or more of the following: a second terminal device, a reader / writer, an integrated access and backhaul device, an intelligent repeater, and a repeater.

72. The network device according to any one of claims 55 to 71, characterized in that: The first terminal device includes: an environmental Internet of Things A-IoT device.

73. A communication device, characterized in that The communication device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so as to enable the communication device to execute the method according to any one of claims 1 to 18.

74. A network device, characterized in that The network device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so as to enable the network device to execute the method according to any one of claims 19 to 36.

75. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to cause the device to execute the method according to any one of claims 1 to 36.

76. A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 36.

77. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 36.

78. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 36.

79. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 36.

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