Power control method and apparatus, and device and storage medium

Abstract

A power control method and apparatus, and a device and a storage medium, which relate to the technical field of communications. The method comprises: a first device sending first information, wherein the first information comprises a receive power obtained by means of measurement, or the first information comprises a first power offset (810). In the method, first information is sent, such that a receiving device can determine a transmit power on the basis of a receive power or a first power offset in the first information, thereby effectively realizing the power control over the receiving device.

Description

Power control method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a power control method, apparatus, device, and storage medium. Background Art

[0002] In recent years, the application of zero-power devices has become increasingly widespread. Zero-power Internet of Things can also be called ambient power enabled IoT, or Ambient IoT for short.

[0003] In the environmental Internet of Things, how communication devices perform power control when sending information requires further research.

[0004] Summary of the Invention

[0005] The present invention provides a power control method, apparatus, device, and storage medium. The technical solutions provided by the present invention are as follows:

[0006] According to one aspect of an embodiment of the present application, a power control method is provided, where the method is performed by a first device and includes:

[0007] First information is sent, where the first information includes the measured received power, or the first information includes a first power offset.

[0008] According to one aspect of an embodiment of the present application, a power control method is provided, where the method is performed by a second device and includes:

[0009] Receive power offset;

[0010] The transmit power is determined according to the power offset.

[0011] According to one aspect of an embodiment of the present application, a power control method is provided, where the method is performed by a first network device, and the method includes:

[0012] receiving first information sent by a first device, where the first information includes measured received power, or the first information includes a first power offset;

[0013] Second information is sent to a second device, where the second information is determined based on the first information, and the second information includes a second power offset.

[0014] According to one aspect of an embodiment of the present application, a power control device is provided, the device comprising:

[0015] The sending module is used to send first information, where the first information includes the measured received power, or the first information includes a first power offset.

[0016] According to one aspect of an embodiment of the present application, a power control device is provided, the device comprising:

[0017] A receiving module, configured to receive a power offset;

[0018] A processing module is used to determine the transmission power according to the power offset.

[0019] According to one aspect of an embodiment of the present application, a power control device is provided, the device comprising:

[0020] a receiving module, configured to receive first information sent by a first device, where the first information includes the measured received power, or the first information includes a first power offset;

[0021] A sending module is configured to send second information to a second device, where the second information is determined based on the first information, and the second information includes a second power offset.

[0022] According to one aspect of an embodiment of the present application, a communication device is provided, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-mentioned power control method on the first device side, the second device side, or the first network device side.

[0023] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, characterized in that a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the above-mentioned power control method on the first device side or the second device side or the first network device side.

[0024] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned power control method on the first device side, the second device side, or the first network device side.

[0025] According to one aspect of an embodiment of the present application, a computer program product is provided, characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned power control method on the first device side or the second device side or the first network device side.

[0026] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0027] By sending the first information, the receiving device can determine the transmitting power based on the receiving power or the first power offset in the first information, thereby effectively implementing power control of the receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0029] FIG2 is a schematic diagram of the basic structure of a zero-power communication system provided by an embodiment of the present application;

[0030] FIG3 is a schematic diagram of a radio frequency energy harvesting principle provided by an embodiment of the present application;

[0031] FIG4 is a schematic diagram of a backscatter communication principle provided by an embodiment of the present application;

[0032] FIG5 is a schematic diagram of a resistive load modulation circuit structure provided by an embodiment of the present application;

[0033] FIG6 is a schematic diagram of two A-IOT deployment scenarios provided in one embodiment of the present application;

[0034] FIG7 is a schematic diagram of an A-IOT uplink transmission process provided by one embodiment of the present application;

[0035] FIG8 is a flow chart of a power control method provided by an embodiment of the present application;

[0036] FIG9 is a schematic diagram of an A-IOT uplink transmission process provided by another embodiment of the present application;

[0037] FIG10 is a schematic diagram of an A-IOT uplink transmission process provided by another embodiment of the present application;

[0038] FIG11 is a flowchart of a power control method provided by another embodiment of the present application;

[0039] FIG12 is a block diagram of a power control device provided by an embodiment of the present application;

[0040] FIG13 is a block diagram of a power control device provided by another embodiment of the present application;

[0041] FIG14 is a block diagram of a power control device provided by another embodiment of the present application;

[0042] FIG15 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0044] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0045] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system, B5G (Beyound5G) system, sixth-generation communication (6G) system or other communication systems, etc.

[0046] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0047] The communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0048] The communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as an unshared spectrum.

[0049] The embodiments of the present application can be applied to both non-terrestrial networks (NTN) and terrestrial networks (TN). NTNs generally use satellite communications to provide communication services to terrestrial users. Currently, NTN systems include NR-NTN and IoT-NTN systems, and may include other NTN systems in the future.

[0050] Please refer to FIG1 , which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 may include: a terminal device 10 , an access network device 20 , and a core network element 30 .

[0051] The terminal device 10 may refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent, or a user apparatus. In some embodiments, the terminal device 10 may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5GS (5th Generation System) or a terminal device in a future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of the present application are not limited thereto. For ease of description, the above-mentioned devices are collectively referred to as terminal devices. The number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20. The terminal device may also be referred to as a terminal or UE for short, and those skilled in the art will understand its meaning.

[0052] Access network equipment 20 is a device deployed in an access network to provide wireless communication capabilities for terminal devices 10. Access network equipment 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different wireless access technologies, the names of devices that provide access network equipment functions may vary. For example, in 5G NR systems, they are referred to as gNodeBs or gNBs. As communication technologies evolve, the term "access network equipment" may change. For ease of description, in the embodiments of this application, the aforementioned devices that provide wireless communication capabilities for terminal devices 10 are collectively referred to as access network equipment. In some embodiments, access network equipment 20 enables communication between terminal devices 10 and core network elements 30. For example, in an LTE (Long Term Evolution) system, access network equipment 20 may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN) or one or more eNodeBs within the EUTRAN. In a 5G NR system, access network equipment 20 may be a Radio Access Network (RAN) or one or more gNBs within the RAN. In the embodiment of the present application, unless otherwise specified, the "network device" refers to the access network device 20, such as a base station.

[0053] The core network element 30 is a network element deployed in the core network. The functions of the core network element 30 are mainly to provide user connection, user management, and service bearer, and to provide an interface to the external network as a bearer network. For example, the core network elements in the 5G NR system may include network elements such as the AMF (Access and Mobility Management Function) entity, the UPF (User Plane Function) entity, and the SMF (Session Management Function) entity.

[0054] In some embodiments, the access network device 20 and the core network element 30 communicate with each other via an air interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other via an air interface technology, such as the Uu interface.

[0055] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to LTE systems, 5G NR systems, and subsequent evolution systems of 5G NR systems (e.g., B5G (Beyond 5G) systems, 6G systems (6th Generation System, sixth generation mobile communication systems)), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems, which are not limited in this application.

[0056] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be a cell corresponding to the network device (for example, a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0057] Before introducing the technical solutions of this application, we first introduce and explain the related technologies involved in this application. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0058] 1. Principle of Zero-Power Communication Technology

[0059] In recent years, the application of zero-power devices has become increasingly widespread. The zero-power Internet of Things (IoT) can also be referred to as ambient power-enabled IoT, or Ambient IoT for short. In some technical literature, it is also referred to as passive IoT. Ambient IoT devices are IoT devices that use various environmental energies (such as radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other environmental energies) to power themselves. These devices can have no energy storage capacity or very limited energy storage capacity (such as using capacitors with a capacity of tens of uF). Compared to existing IoT devices, ambient IoT devices offer many advantages, including no conventional batteries, no maintenance, small size, low complexity, low cost, and a long lifespan.

[0060] Zero-power communication utilizes energy harvesting and backscatter communication technologies. A zero-power communication network consists of network devices and zero-power devices, as shown in Figure 2. The network devices are used to send wireless power supply signals and downlink communication signals to the zero-power devices and to receive backscatter signals from them. A basic zero-power device includes an energy harvesting module, a backscatter communication module, and a low-power computing module. Furthermore, the zero-power device may also include a memory or sensor to store basic information (such as item identification) or obtain sensor data such as ambient temperature and humidity.

[0061] The key technologies of zero-power communication mainly include radio frequency energy harvesting and backscatter communication.

[0062] 1.1. RF Power Harvesting

[0063] As shown in Figure 3, the RF energy harvesting module uses the principle of electromagnetic induction to harvest electromagnetic wave energy from space, thereby obtaining the energy needed to operate zero-power devices. This energy is used to drive low-power demodulation and modulation modules, sensors, and memory readout. Therefore, zero-power devices do not require traditional batteries.

[0064] 1.2. Back Scattering

[0065] As shown in Figure 4, a zero-power communication terminal receives wireless signals sent by the network, modulates them, loads the information to be transmitted, and radiates the modulated signal from the antenna. This information transmission process is called backscatter communication. Backscatter and load modulation are closely related. Load modulation achieves this by adjusting and controlling the circuit parameters of the zero-power device's oscillator circuit according to the data stream's rhythm, causing parameters such as the electronic tag's impedance to change accordingly. Load modulation techniques primarily include resistive load modulation and capacitive load modulation. In resistive load modulation, a resistor is connected in parallel with the load, which is turned on or off based on the binary data stream, as shown in Figure 5 below. The switching of the resistor causes a change in the circuit voltage, thus implementing amplitude shift keying (ASK) modulation. This modulation and transmission of the signal is achieved by adjusting the amplitude of the backscattered signal from the zero-power device. Similarly, in capacitive load modulation, the circuit resonant frequency can be changed by switching the capacitor on and off, realizing frequency shift keying (FSK) modulation, that is, signal modulation and transmission are achieved by adjusting the operating frequency of the backscattered signal of the zero-power device.

[0066] It can be seen that the zero-power device uses load modulation to modulate the incoming signal, thereby realizing the backscatter communication process. Therefore, the zero-power device has significant advantages:

[0067] (1) The terminal does not actively transmit signals, so it does not require complex RF links, such as PA (Power Amplifier) ​​and RF filters;

[0068] (2) The terminal does not need to actively generate high-frequency signals, so it does not need a high-frequency crystal oscillator;

[0069] (3) With the help of backscatter communication, terminal signal transmission does not need to consume the terminal's own energy.

[0070] 1.3. Application Scenarios of Zero-Power Communication

[0071] Due to its significant advantages such as extremely low cost, zero power consumption, and small size, zero-power communication can be widely used in various industries, such as logistics for vertical industries, smart warehousing, smart agriculture, energy and electricity, industrial Internet, etc.; it can also be applied to personal applications such as smart wearables and smart homes.

[0072] 1.4. Classification of Zero-Power Devices

[0073] Based on the energy source and usage of zero-power devices, zero-power devices can be divided into the following types:

[0074] (1) Passive zero-power devices

[0075] Zero-power devices do not require internal batteries. When they approach network devices (such as the reader / writer of an RFID (Radio Frequency Identification) system), they are within the near field formed by the radiation from the network device's antenna. Therefore, the zero-power device antenna generates an induced current through electromagnetic induction, which drives the low-power chip circuit of the zero-power device. This implements tasks such as demodulating the forward link signal (downlink, the link from the network device to the zero-power device) and modulating the backward link signal (uplink, the link from the zero-power device to the network device). For backscatter links, the zero-power device uses backscatter implementation to transmit signals.

[0076] 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.

[0077] Passive zero-power devices do not require batteries, and their RF circuits and baseband circuits are very simple. For example, they do not require devices such as LNA (Low Noise Amplifier), PA, crystal oscillator, and ADC (Analog-to-Digital Converter). Therefore, they have many advantages such as small size, light weight, very low price, and long service life.

[0078] (2) Semi-passive zero-power devices

[0079] Semi-passive zero-power devices do not have conventional batteries themselves, but instead use RF (Radio Frequency) energy harvesting modules to harvest radio wave energy, or solar, light, thermal, or kinetic energy harvesting modules to harvest energy, and store the harvested energy in an energy storage unit (such as a capacitor). Once the energy storage unit receives energy, it drives the low-power chip circuitry of the zero-power device, performing tasks such as demodulating forward link signals and modulating backward link signals. For backscatter links, the zero-power device uses backscattering to transmit signals.

[0080] It can be seen that the semi-passive zero-power device does not require a built-in battery to drive either the forward link or the reverse link. Although it uses energy stored in capacitors during operation, the energy comes from the radio energy collected by the energy harvesting module. Therefore, it is also a truly zero-power device.

[0081] Semi-passive zero-power devices inherit many advantages of passive zero-power devices, so they have many advantages such as small size, light weight, very low price, and long service life.

[0082] (3) Active zero-power devices

[0083] The zero-power devices used in some scenarios can also be active zero-power devices. Such terminals can have built-in batteries (conventional batteries, such as dry batteries, rechargeable lithium batteries, etc.). The battery is used to drive the low-power chip circuit of the zero-power device. It realizes the demodulation of the forward link signal and the modulation of the reverse link signal. However, for the backscatter link, the zero-power device uses the backscatter implementation method to transmit the signal. Therefore, the zero power consumption of this type of terminal is mainly reflected in the fact that the signal transmission of the reverse link does not require the terminal's own power, but uses the backscatter method. 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 compared with the existing technology, the battery life can be greatly improved.

[0084] Active zero-power devices, with built-in batteries to power the RFID chip, increase the tag's read and write distance and improve communication reliability. Therefore, they are suitable for scenarios with relatively high requirements for communication distance and read latency.

[0085] Classification of zero-power devices based on transmitter type.

[0086] As we all know, the business types of zero-power IoT, like other IoT business types, will also focus on uplink business. Therefore, based on the way zero-power terminals send data, they can be divided into the following types:

[0087] (1) Zero-power devices based on backscattering

[0088] These zero-power devices use the aforementioned backscattering method to transmit uplink data. They lack active transmitters, only backscattering transmitters. Therefore, when these terminals transmit data, they require network equipment to provide a carrier, which they then use to perform backscattering to achieve data transmission.

[0089] (2) Zero-power devices based on active transmitters

[0090] 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.

[0091] (3) Zero-power devices with both backscatter and active transmitters

[0092] This type of terminal supports both backscatter and active transmitters. The terminal 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.

[0093] 2. Cellular Passive IoT

[0094] The cellular Internet of Things (IoT) is booming. The 3rd Generation Partnership Project (3GPP) has standardized IoT technologies such as NB-IoT (Narrow Band Internet of Things), MTC (Machine Type Communication), and RedCap (Reduced Capability). However, there are still many scenarios where IoT communication needs cannot be met using existing technologies. For example:

[0095] (1) Harsh communication environment

[0096] Certain IoT scenarios may encounter 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.

[0097] (2) Demand for extremely small terminal form factors

[0098] 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.

[0099] (3) Extremely low-cost IoT communication requirements

[0100] Many IoT communication scenarios require IoT terminals to be sufficiently affordable to enhance their competitiveness compared to alternative technologies. For example, in logistics or warehousing, 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 competitively priced.

[0101] Therefore, in order to cover these unmet IoT communication needs, cellular networks also need to develop ultra-low-cost, extremely small-size, battery-free or maintenance-free IoT, and zero-power IoT can just meet this demand.

[0102] Based on 3GPP's discussion of Ambient IoT application scenarios, Ambient IoT can be used in at least the following four scenarios:

[0103] (1) Object recognition, such as logistics, production line product management, and supply chain management;

[0104] (2) Environmental monitoring, such as temperature, humidity, and harmful gas monitoring of the working environment and natural environment;

[0105] (3) Positioning, such as indoor positioning, intelligent object search, and production line item positioning;

[0106] (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).

[0107] 3GPP discussed and approved the A-IoT research project, which includes at least the following two A-IoT device types:

[0108] Category 1 A-IOT device: ~1uW peak power consumption, with energy storage, an initial sampling frequency offset of 10X ppm, no uplink or downlink power amplifiers, and uplink transmissions via backscattering of an external carrier. For example, X ranges from 4 to 5, i.e., [4, 5].

[0109] Category 2 A-IOT devices: These devices have a peak power consumption of less than a few hundred uW, have energy storage, an initial sampling frequency offset of 10X ppm, and may be equipped with uplink and / or downlink power amplifiers. Uplink transmissions can be generated internally within the A-IOT device (i.e., active transmissions) or sent via backscattering of an external carrier. For example, X ranges from 4 to 5, i.e., [4, 5].

[0110] A-IOT mainly considers the following two deployment scenarios / topologies, as shown in Figure 6:

[0111] (1) IoT device, the base station directly conducts two-way signaling and / or data communication with the A-IOT device. The base station sending to the A-IOT device and the base station receiving the A-IOT may be two different base stations.

[0112] (2) IoT devices, A-IoT devices, communicate bidirectionally with intermediate nodes, which relay signaling and / or data between the base station (BS) and the A-IoT devices. During the SID discussion phase, the intermediate node was ultimately determined to be a user equipment (UE) under network control, located indoors.

[0113] Currently, two main services are being considered in A-IOT research projects: DT (Device-terminated) and DO-DTT (Device-originated–device-terminated triggered). DT primarily uses downlink commands to enable an A-IOT terminal to perform specific actions. For example, in a smart home scenario, a "turn on the air conditioner" command is issued to an A-IOT device, and the A-IOT device performs the corresponding operation. DO-DTT primarily uses downlink commands to trigger A-IOT devices to report information. Typical scenarios include warehouse inventory or sensor sensing. For example, triggering information to trigger several zero-power tags to report their IDs or sensor data.

[0114] 3.NR uplink power control

[0115] 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.

[0116] 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.

[0117] For example, the UE's transmit power P = min(P0+α*PL+offset, Pcmax) dBm. Pcmax is the UE's maximum transmit power. For open-loop power control, P0+α*PL is the power determined based on open-loop power control, P0 is the target receive power, and α is the path loss compensation factor. P0 and α are configured by the network, for example, through RRC (Radio Resource Control) signaling. Therefore, also limited by 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 UE's transmit power. 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 signal or CSI-RS (Channel-State Information Reference Signal) in the downlink SSB (Synchronization Signal Block). 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.

[0118] 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. This power offset, also known as TPC (Transmission Power Control), is indicated by the base station to the UE via DCI (Downlink Control Information). Specifically, this power offset operates in two ways. One way is for the UE to obtain a power offset after receiving DCI and directly use this offset and the power P0 + α * PL determined by open-loop power control to calculate the final transmit power according to the above formula P = min (P0 + α * PL + offset, Pcmax) dBm. Another operating mode is that after receiving DCI, the UE obtains the current power offset, recorded as offset2. Assuming that power offset1 is the cumulative value of all previously received power offsets, that is, the sum of all previously received power offsets, the UE first calculates offset = offset1 + offset2. Then, based on the offset and the power P0 + α * PL determined based on open-loop power control, the final transmit power is calculated according to the formula P = min (P0 + α * PL + offset, Pcmax) dBm. The difference between the above two operating modes is that in the first operating mode, the power offset currently received by the UE is directly applied to the power determined based on open-loop power control, while in the second operating mode, the power offset currently received by the UE is first applied to the cumulative value of all previously received power offsets and then to the power determined based on open-loop power control. It can be understood that in the second operating mode, the UE needs to store the cumulative value of all previously received power offsets. The first working mode mentioned above can be called non-accumulation closed-loop power control, and the second working mode can be called accumulation-based closed-loop power control.

[0119] Please refer to Figure 7, which shows a schematic diagram of the A-IOT uplink transmission process provided by one embodiment of the present application, which corresponds to deployment scenario 2 shown in Figure 6. The tag performs A-IOT uplink transmission to the intermediate node via backscattering. The intermediate node further sends Uu uplink transmission data to the base station based on the tag's A-IOT uplink transmission. In some embodiments, A-IOT uplink transmission can also be referred to as device-to-reader transmission, i.e., D2R.

[0120] Specifically, the carrier wave node needs to provide the tag with an A-IOT uplink carrier, such as a single-frequency sine wave, and the tag modulates the carrier, such as OOK (On Off keying) modulation, to generate a modulated waveform for transmission to the intermediate node. For the carrier node, the power of the A-IOT uplink carrier it sends needs to be limited. On the one hand, the greater the power of the A-IOT uplink carrier sent by the carrier node, the greater the transmission power of the tag for backscattering, and the greater the receiving power of the modulated waveform received by the intermediate node. If the intermediate node also receives the A-IOT uplink transmission of other tags at the same time, the excessive receiving power will interfere with the A-IOT uplink transmission of other tags, that is, uplink transmission interference between tags. On the other hand, as shown in Figure 7, in addition to receiving the modulated waveform signal from the tag, the intermediate node will also directly receive the sine wave from the carrier node, which is the interference in Figure 7. If the carrier node's transmission power is large, the sine wave will interfere with the tag's modulation waveform reception. For example, there will be a receiving power component corresponding to the sine wave at a certain frequency point within the bandwidth range of the tag's modulation waveform.

[0121] Therefore, further research is needed on how to perform power control on carrier nodes when they transmit uplink carriers.

[0122] Please refer to Figure 8, which shows a flow chart of a power control method provided by an embodiment of the present application, which can be applied to the network architectures shown in Figures 1 and 6. The method can include the following step 810.

[0123] Step 810: The first device sends first information, where the first information includes measured received power, or the first information includes a first power offset.

[0124] The first device may send the first information to the first network device, and the first device may also send the first information to the second device.

[0125] In some embodiments, the first device may be a first terminal device, which may be an intermediate node. The second device may be a second terminal device, which may also be a second network device. The first terminal device and the second terminal device may be different terminal devices, and the first network device and the second network device may be different network devices.

[0126] For example, the first device may be the intermediate node in Figure 7, and the intermediate node may be a terminal device, such as a UE under network control. Optionally, the intermediate node is located indoors; the first network device may be the base station in Figure 7; the second device may be the carrier node in Figure 7, and the carrier node may be a terminal device, such as a UE under network control. Optionally, the carrier node is located indoors, or it may be a network device, such as a base station.

[0127] As shown in Figure 9, in some embodiments, a first device sends first information to a first network device, so that the first network device determines a second power offset based on the first information and sends the second power offset to the second device. Accordingly, the first network device receives the first information sent by the first device, where the first information includes the measured received power or the first power offset.

[0128] As shown in Figure 10, in some embodiments, a first device sends first information to a second device. Correspondingly, the second device receives the first information sent by the first device, where the first information includes a first power offset.

[0129] In some embodiments, the first device sends first information to the first network device. The first information may be carried by a PUCCH (Physical Uplink Control Channel) or a PUSCH (Physical Uplink Shared CHannel), which is not limited in this application. In some embodiments, the first device sends first information to the second device. The first information may be carried by a PSCCH (Physical Sidelink Control Channel) or a PSSCH (Physical Sidelink Share Channel), which is not limited in this application.

[0130] The above method sends first information including received power or a first power offset to a first network device, so that the first network device can determine a second power offset based on the received power or the first power offset, thereby enabling a second device to determine transmit power based on the second power offset; or sends first information including the first power offset to a second device, so that the second device can determine transmit power based on the first power offset. This method allows the second device to flexibly determine transmit power based on the information sent by the first device or the first network device.

[0131] In some embodiments, the received power in the first information can be obtained by the following three measurement methods:

[0132] (1) The received power may be measured based on transmission from the A-IOT device to the first device.

[0133] The transmission from the A-IOT device to the first device includes but is not limited to the modulated signal sent by the A-IOT device to the first device as described below, the modulated signal sent by the A-IOT device to the first device through backscattering, the sequence or control channel or data channel or pilot signal sent by the A-IOT device to the first device, etc.

[0134] In some embodiments, the received power is the received power of the modulated signal sent by the A-IOT device.

[0135] A modulated signal, also known as a modulated waveform, is a signal used to carry information during communications. It is generated by modulating relevant characteristics of a carrier wave, such as amplitude, frequency, and phase. The received power of a modulated signal refers to the signal power detected by a receiving device after receiving the modulated signal. It can be expressed as the average signal power received by the receiving device over a specific period of time. The receiving device may be the first device.

[0136] In some embodiments, the received power may be the received power of a modulated signal sent by the A-IOT device through backscattering.

[0137] Backscatter is a communication technology commonly used in the IoT field. In backscatter communication, an A-IoT device uses passive reflection to send a modulated signal to a receiving device without generating the signal itself.

[0138] In some embodiments, the received power may be measured based on a sequence or a control channel or a data channel or a pilot signal sent by the A-IOT device to the first device.

[0139] The sequence can be used for timing calibration or for indicating control information. Timing calibration is used to ensure clock synchronization between different devices in a wireless communication system, thereby achieving accurate data transmission and communication coordination. In some embodiments, the sequence is a preamble.

[0140] A control channel refers to a channel used to transmit control information in a communication system. A data channel refers to a channel used to transmit data in a communication system. Data can be in the form of a TB (Transport Block), a PDU (Protocol Data Unit), a data packet, etc. Control information can also be called signaling information or control signaling. Generally speaking, control information has a smaller number of bits than data. A pilot signal refers to a specific reference signal used for synchronization and frequency calibration as well as for measurement in a communication system, such as a DMRS (Demodulation Reference Signal), a CSI-RS, a PT-RS (Phase Track Reference Signal), etc.

[0141] In some embodiments, the received power may be the power of the preamble sent by the A-IOT device to the first device; the received power may also be the power of the transmission signal sent by the A-IOT device to the first device through the control channel; the received power may also be the power of the transmission signal sent by the A-IOT device to the first device through the data channel; the received power may also be the power of the pilot signal sent by the A-IOT device to the first device.

[0142] The above method is based on the measurement of the transmission from the A-IOT device to the first device, and the received power can be obtained. Specifically, the received power can be determined by the modulated signal sent by the A-IOT device. The received power is determined by the modulated signal sent by the A-IOT device, and the determined received power can reflect the size of the transmit power of the second device. For example, when the received power is too large, it means that the transmit power of the second device is also too large. The transmit power of the second device can be adjusted according to the received power. Specifically, the first power offset and the second power offset can be determined according to the received power, so that the second device can accurately determine the transmit power based on the first power offset or the second power offset.

[0143] (2) Received power can be measured based on the carrier.

[0144] The carrier may be a carrier sent by the second device, and is used to provide an uplink transmission channel to the A-IOT device. The uplink transmission may be a transmission signal sent by the A-IOT device to the first device.

[0145] In some embodiments, the received power is the received power measured within a frequency range corresponding to the carrier transmitted by the second device.

[0146] Specifically, the received power measured by the first device may be an average received power, a maximum received power, or a minimum received power measured within a frequency range corresponding to the carrier. Exemplarily, the received power may be a received signal strength, a signal-to-noise ratio, a signal-to-interference-and-noise ratio, or a peak-to-average power ratio of the received signal, which is not limited in this application.

[0147] In some embodiments, the frequency range corresponding to the carrier wave can be defined by a starting frequency and an ending frequency. For example, the starting frequency can be 100 MHz and the ending frequency can be 500 MHz, so the frequency range of the carrier wave is 100 MHz to 500 MHz. The received power measured within 100 MHz to 500 MHz can be used as the received power measured by the first device.

[0148] In some embodiments, the frequency range corresponding to the carrier can be defined by the carrier frequency f and delta. For example, if the carrier frequency f is 100 MHz and delta is 5 MHz, the frequency range corresponding to the carrier is [f-delta, f+delta], i.e., 95 MHz to 105 MHz.

[0149] In some embodiments, the frequency range corresponding to the carrier wave can be continuous or discontinuous. For example, when the second device transmits a single-frequency sine wave, the frequency range corresponding to the carrier wave is continuous. When the second device transmits multiple-frequency sine waves, the frequency range corresponding to the carrier wave is discontinuous.

[0150] In some embodiments, the received power is the received power measured at a frequency corresponding to a carrier transmitted by the second device.

[0151] Specifically, the received power measured at the frequency point corresponding to the carrier can be used as the received power measured by the first device. Exemplarily, the received power can be the received signal strength or the signal-to-noise ratio or signal-to-interference-and-noise ratio or peak-to-average power ratio of the received signal. This application is not limited to this.

[0152] The frequency point corresponding to the carrier refers to a specific frequency value within the frequency range. For example, the second device can send a sine wave at a single frequency point, and the received power measured at the frequency point where the sine wave is located can be used as the received power measured by the first device. For example, the second device can also send a sine wave at multiple frequency points, measure the received power at the multiple frequency points where the sine wave is located, and determine the received power measured by the first device based on the received power at the multiple frequency points. For example, the received power measured by the first device can be the maximum value, minimum value or average value of the received power at the multiple frequency points, and this application does not limit this.

[0153] The above method is based on the carrier for measurement and can obtain the received power. Specifically, the received power can be determined by the received power measured within the frequency range corresponding to the carrier sent by the second device. Similarly, the received power measured within the frequency range corresponding to the carrier can directly reflect the size of the transmit power of the second device. For example, when the received power is too large, it means that the transmit power of the second device is also too large. The transmit power of the second device can be adjusted according to the received power. Specifically, the first power offset and the second power offset can be determined according to the received power, so that the second device can accurately determine the transmit power based on the first power offset or the second power offset.

[0154] (3) In some embodiments, the received power may be measured based on the first frequency range.

[0155] In some embodiments, the first frequency range is a frequency range for uplink transmission by the A-IOT device.

[0156] The frequency range for uplink transmission of the A-IOT device refers to the communication frequency band used by the A-IOT device to send uplink data to the first device. The communication frequency band can be configured by the network, pre-configured, or pre-defined by the standard, and this application does not limit this. In some embodiments, the frequency range of the uplink transmission depends on [fa, f+a], where f is the frequency of the carrier and a is the bandwidth corresponding to the modulation waveform. For example, a is greater than or equal to the above-mentioned delta. The received power can be measured based on the frequency range for uplink transmission of the A-IOT device, and the received power can be the received power within the frequency range for uplink transmission of the A-IOT device. For example, the received power is the average received power, the maximum received power, or the minimum received power within the frequency range for uplink transmission of the A-IOT. For example, the received power can be the received signal strength, the signal-to-noise ratio, the signal-to-interference-and-noise ratio, or the peak-to-average power ratio of the received signal, and this application does not limit this.

[0157] In some embodiments, the first frequency range includes a modulated signal sent by the A-IOT device and / or a carrier sent by the second device. The modulated signal sent by the A-IOT device and the carrier sent by the second device are two different types of signals. As shown in FIG9 , when the second device provides an uplink carrier for the A-IOT device, the first device will also receive the carrier sent by the second device, which will interfere with the first device's reception of the modulated waveform sent by the A-IOT device. Therefore, the received power can be measured based on the carrier sent by the second device. When the power of the carrier sent by the second device is too large, it can be adjusted in a timely manner subsequently.

[0158] In some embodiments, the first frequency range is a PRB (Physical Resource Block) or bandwidth occupied by the A-IOT device for uplink transmission.

[0159] PRB refers to the basic unit used to allocate and transmit data in a wireless communication system. In communication systems such as LTE, PRB generally represents an area in time and frequency for transmitting data. Bandwidth refers to the frequency range or channel width used for data transmission in wireless communication. It determines the amount of data that the system can transmit and is usually measured in Hertz (Hz). The first frequency range may include the frequency range occupied by the PRB used by the A-IOT device to send data to the first device. The first frequency range may also include the bandwidth range used by the A-IOT device to send data to the first device.

[0160] The above method can obtain the received power by measuring based on the first frequency range. The first frequency range is the frequency range for uplink transmission of the A-IOT device, and the first frequency range includes the modulated signal sent by the A-IOT device and / or the carrier sent by the second device. Similarly, since the first frequency range is the range for uplink transmission of the A-IOT device, the received power obtained by measuring based on the first frequency range can reflect the size of the transmit power of the second device. For example, when the received power is too large, it means that the transmit power of the second device is also too large. The transmit power of the second device can be adjusted according to the received power. Specifically, the first power offset and the second power offset can be determined according to the received power, so that the second device can accurately determine the transmit power based on the first power offset or the second power offset.

[0161] In some embodiments, when the first information includes a first power offset, the first power offset may be determined according to the received power.

[0162] In some embodiments, when the received power is greater than, equal to, or greater than a first threshold, the first power offset is negative or 0; and / or, when the received power is less than or less than or equal to the first threshold, the first power offset is positive or 0; wherein the first threshold is configured by the network, or pre-configured, or depends on the implementation of the first device, or is a preset value specified by the standard.

[0163] For the above embodiment, the received power greater than or equal to the first threshold corresponds to the received power less than the first threshold, and the received power greater than the first threshold corresponds to the received power less than or equal to the first threshold; the first power offset is negative or 0 corresponds to the first power offset being positive, and the first power offset is negative corresponding to the first power offset being positive or 0.

[0164] When the received power is greater than or equal to or greater than the first threshold, it can be considered that the received power is large at this time. In order to reduce the A-IOT uplink transmission interference between multiple tags, the first power offset is a negative number or 0, so that the transmit power of the second device can be promptly reduced in the future to ensure that the modulated signal sent by each A-IOT device has low interference in the entire network, thereby maintaining good communication quality and stability. When the received power is less than or less than or equal to the first threshold, it can be considered that the received power is small at this time. In order to ensure normal and stable A-IOT uplink transmission, the first power offset is a positive number or 0, so that the transmit power of the second device can be promptly increased in the future to ensure that the modulated signal sent by the A-IOT device can be normally received by the first device.

[0165] In some embodiments, when the difference or ratio between the received power within the frequency range corresponding to the carrier sent by the second device and the received power within the first frequency range is greater than, equal to, or greater than a second threshold, the first power offset is negative or 0; and / or, when the difference or ratio between the received power within the frequency range corresponding to the carrier sent by the second device and the received power within the first frequency range is less than, equal to, or less than the second threshold, the first power offset is positive or 0; wherein the second threshold is configured by the network, or pre-configured, or depends on the implementation of the first device, or is a preset value specified by the standard.

[0166] For the above embodiment, the difference or ratio of the received power is greater than or equal to the second threshold and the difference or ratio of the received power is less than the second threshold, and the difference or ratio of the received power is greater than the second threshold and the difference or ratio of the received power is less than or equal to the second threshold; the first power offset is negative or 0 and corresponds to the first power offset being positive, and the first power offset is negative and corresponds to the first power offset being positive or 0.

[0167] When the difference or ratio of the received power within the frequency range corresponding to the carrier transmitted by the second device to the received power within the first frequency range is greater than, equal to, or greater than the second threshold, it can be considered that the received power of the carrier relative to the modulated waveform is large at this time. In order to reduce the interference of the carrier on the A-IOT uplink transmission, the first power offset is negative or 0, so that the transmit power of the second device can be reduced in time to ensure the reliability of the modulated signal transmitted by the A-IOT device, thereby maintaining good communication quality and stability. When the difference or ratio of the received power within the frequency range corresponding to the carrier transmitted by the second device to the received power within the first frequency range is less than, equal to, or less than the second threshold, it can be considered that the received power of the carrier relative to the modulated waveform is small at this time. In order to ensure normal and stable A-IOT uplink transmission, the first power offset is positive or 0, so that the transmit power of the second device can be appropriately increased to ensure that the modulated signal transmitted by the A-IOT device can be normally received by the first device.

[0168] The above method determines the first power offset based on the received power. When the received power is large, the first power offset is determined to be a negative number or 0. When the received power is small, the first offset is determined to be a positive number or 0. Because the first power offset can be used to subsequently determine the transmit power of the second device, the transmit power of the second device can be flexibly and accurately adjusted based on the size of the first power offset, thereby ensuring the stability and reliability of A-IOT uplink transmission.

[0169] In some embodiments, as shown in FIG9 , the first network device sends second information to the second device, where the second information is determined based on the first information and includes a second power offset.

[0170] In some embodiments, when the first information includes a measured received power, the first network device determines a second power offset based on the received power and sends the second power offset to the second device, wherein determining the second power offset based on the received power can refer to the above-mentioned method for determining the first power offset based on the received power. When the first information includes a first power offset, the first network device determines a second power offset based on the first power offset and sends the second power offset to the second device. The first offset and the second offset can be the same or different, and this application is not limited to this.

[0171] The second information can be carried by a PDCCH (Physical Downlink Control CHannel) or a PDSCH (Physical Downlink Shared Channel), which is not limited in this application. For example, the base station sends the second information to the second device via a backhaul link. This transmission method generally involves transmitting the second information to the second device via multiple transfer nodes.

[0172] The method provided in the embodiment of the present application sends the first information, and the receiving device can determine the sending power based on the receiving power or the first power offset in the first information, thereby effectively realizing power control of the receiving device.

[0173] Please refer to Figure 11, which shows a flow chart of a power control method provided by another embodiment of the present application, which can be applied to the network architectures shown in Figures 1 and 6. The method can include at least one of the following steps 1110-1120.

[0174] Step 1110: The second device receives a power offset.

[0175] In some embodiments, the power offset may include a first power offset and a second power offset.

[0176] In some embodiments, the power offset may include a first power offset or a second power offset.

[0177] The step of receiving the first power offset may be: the first device sends first information to the second device; correspondingly, the second device receives the first information sent by the first device, where the first information includes the first power offset.

[0178] The step of receiving the second power offset may be: the first network device sends second information to the second device; accordingly, the second device receives the second information sent by the first network device, where the second information includes the second power offset.

[0179] Step 1120: Determine the transmit power according to the power offset.

[0180] In some embodiments, the transmit power of the carrier is determined based on the power offset.

[0181] In some embodiments, the transmit power of the carrier is determined according to the first power offset or the second power offset.

[0182] When the first power offset or the second power offset is positive or 0, the transmit power of the carrier is determined according to the first power offset or the second power offset, and the transmit power will be adjusted to a higher level to ensure the stability and reliability of the A-IOT uplink transmission; when the first power offset or the second power offset is negative or 0, the transmit power of the carrier is determined according to the first power offset or the second power offset, and the transmit power will be adjusted to a lower level. On the one hand, the A-IOT uplink transmission interference between multiple tags can be reduced, and on the other hand, the interference of the carrier to the first device can be reduced, thereby ensuring the reliability of the A-IOT uplink transmission.

[0183] In some embodiments, the transmit power is determined based on at least one of: a first parameter and a second parameter, wherein the first parameter is a power value specified by a configuration or standard or determined by the second device, and the second parameter is determined based on a power offset.

[0184] In some embodiments, the first parameter is a power value configured or indicated by the first network device to the second device; or, the first parameter is a preconfigured power value; or, the first parameter is a power value specified by the standard; or, the first parameter is a power value that depends on the implementation of the second device; or, the first parameter is determined based on the path loss between the first device and the second device.

[0185] Exemplarily, the power value achieved by the second device may be a maximum power value or a minimum power value that can be transmitted by the second device.

[0186] The path loss between the first device and the second device refers to the attenuation and loss of the signal during propagation due to factors such as the transmission medium and distance. For example, the first parameter can be recorded as Pinitial, and the path loss between the first device and the second device can be recorded as PL, where PL = Tx_Power - Rx_Power, where Rx_Power is the received power of the transmission signal from the first device measured by the second device, for example, the received power corresponding to the first information; Tx_Power is indicated by the first device to the second device, and the Tx_Power can be included in the first information. The Tx_Power can be carried by the PSCCH or PSSCH.

[0187] Optionally, Pinitial = P0 + α * PL, where P0 is the target receiving power, α is the path loss compensation factor, P0 and α are configured to the second device by the network, or pre-configured, or indicated or configured to the second device by the first device, or are preset values ​​specified by the standard.

[0188] Optionally, Pinitial=P0+10log10(M)+α*PL, where M is the number of carriers sent by the second device.

[0189] Optionally, Pinitial=P0+10log10(K)+α*PL, where K is the number of PRBs or bandwidth (Hz) corresponding to the carrier sent by the second device, that is, how many PRBs or how many Hz of frequency domain width the carrier occupies.

[0190] Optionally, Pinitial = P0 + 10log10((2^μ)*K) + α*PL, where K is the number of PRBs corresponding to the carrier sent by the second device, and μ corresponds to the subcarrier spacing. For example, when the subcarrier spacing is 15 kHz, μ is 0; when the subcarrier spacing is 30 kHz, μ is 1; and when the subcarrier spacing is 60 kHz, μ is 2.

[0191] In some embodiments, the second parameter is equal to the power offset; or, the second parameter is equal to the sum of the power offset and the power offset received by the second device last time; or, the second parameter is equal to the sum of the power offset and the second parameter calculated by the second device last time.

[0192] In some embodiments, when the second parameter is determined based on the first power offset, the second parameter is equal to the first power offset; or, the second parameter is equal to the sum of the first power offset and the first power offset received by the second device last time; or, the second parameter is equal to the sum of the first power offset and the second parameter calculated by the second device last time.

[0193] In some embodiments, when the second parameter is determined based on the second power offset, the second parameter is equal to the second power offset; or, the second parameter is equal to the sum of the second power offset and the second power offset last received by the second device; or, the second parameter is equal to the sum of the second power offset and the second parameter last calculated by the second device.

[0194] For example, the second parameter can be recorded as offset, offset i is the power offset received for the i-th time, and offset(i-1) is the power offset received by the second device last time. The second parameter calculated by the second device last time is The value of n is i-1, which is the sum of the power offsets received before (i-1). When the second device receives the power offset offset i for the i-th time, the second parameter offset can be offset i, offset i+offset(i-1), or offset i+offset(i-1). This application does not limit this.

[0195] Optionally, the transmission power P=Pinitial+offset, that is, the transmission power may be the sum of the first parameter and the second parameter.

[0196] Optionally, the transmit power P = min(Pinitial + offset, Pcmax), where Pcmax is the maximum transmit power of the second device, i.e., the transmit power is the smaller of the sum of the first parameter and the second parameter and the maximum transmit power of the second device. For example, Pinitial and Pcmax may be expressed in dBm, and offset may be expressed in dB, but this application does not limit this.

[0197] The above method can determine the transmit power according to the first parameter and / or the second parameter, such as determining the transmit power according to the sum of the first parameter and the second parameter, wherein the first parameter can be determined by the configuration of the first network device, etc., and the second parameter can be determined based on the power offset. This method can give full play to the regulating role of the second parameter and ensure that the transmit power is fine-tuned based on the first parameter to adapt to changes in the A-IOT uplink transmission process. For example, when there is interference during the A-IOT transmission process, the transmit power can be reduced by the second parameter. When the A-IOT device is far away from the first device during the A-IOT transmission process, the transmit power can be increased by the second parameter to ensure reliable transmission of the signal.

[0198] Furthermore, there are multiple ways to determine the second parameter, which can be flexibly selected according to specific circumstances, which helps to ensure the performance of the system in different scenarios.

[0199] The method provided in the embodiment of the present application can determine the transmission power by receiving the power offset, thereby effectively realizing the power control of the receiving device.

[0200] In the above method embodiments, the technical solution of the present application is introduced and explained only from the perspective of the interaction between the first device and the first network device, the interaction between the first device and the second device, and the interaction between the first network device and the second device. The above steps performed by the first device can be independently implemented as a wireless communication method on the first device side, the above steps performed by the first network device can be independently implemented as a wireless communication method on the first network device side, and the above steps performed by the second device can be independently implemented as a wireless communication method on the second device side. In addition, the embodiments provided herein can be arbitrarily combined to form new embodiments, which are all within the scope of protection of this application.

[0201] The following is an embodiment of the device of the present application. For details not described in detail in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0202] Please refer to Figure 12, which shows a block diagram of a power control device provided by an embodiment of the present application. The device has the function of implementing the power control method on the first device side described above. The function can be implemented by hardware or by hardware executing corresponding software. The device can be the first device described above, or it can be set in the first device. As shown in Figure 12, the device 1200 can include: a sending module 1210.

[0203] The sending module 1210 is configured to send first information, where the first information includes the measured received power, or the first information includes a first power offset.

[0204] In some embodiments, the received power is measured based on transmissions from an A-IOT device to the first device.

[0205] In some embodiments, the received power is the received power of the modulated signal sent by the A-IOT device.

[0206] In some embodiments, the received power is measured based on a carrier wave.

[0207] In some embodiments, the received power is the received power measured within a frequency range corresponding to the carrier sent by the second device.

[0208] In some embodiments, the received power is measured based on a first frequency range.

[0209] In some embodiments, the first frequency range is a frequency range for uplink transmission by an A-IOT device.

[0210] In some embodiments, the first frequency range includes a modulated signal sent by an A-IOT device and / or a carrier sent by a second device.

[0211] In some embodiments, when the first information includes the first power offset, the apparatus further includes: a processing module (not shown in FIG12 ).

[0212] A processing module is used to determine the first power offset according to the received power.

[0213] In some embodiments, when the received power is greater than or equal to or greater than a first threshold, the first power offset is negative or 0; and / or, when the received power is less than or less than or equal to the first threshold, the first power offset is positive or 0; wherein, the first threshold is configured by the network, or pre-configured, or depends on the implementation of the first device, or is a preset value specified by the standard.

[0214] In some embodiments, the sending module 1210 is used to send the first information to a first network device so that the first network device determines a second power offset based on the first information and sends the second power offset to a second device; or, send the first information to the second device.

[0215] In some embodiments, the first device is a first terminal device.

[0216] Please refer to Figure 13, which shows a block diagram of a power control device provided by another embodiment of the present application. This device has the function of implementing the power control method on the second device side described above. The function can be implemented by hardware or by hardware executing corresponding software. This device can be the second device described above, or it can be provided in the second device. As shown in Figure 13, the device 1300 may include: a receiving module 1310 and a processing module 1320.

[0217] A receiving module 1310 is configured to receive a power offset;

[0218] The processing module 1320 is configured to determine the transmit power according to the power offset.

[0219] In some embodiments, the processing module 1320 is configured to determine the transmit power of the carrier according to the power offset.

[0220] In some embodiments, the transmit power is determined based on at least one of: a first parameter, a second parameter, wherein the first parameter is a power value specified by a configuration or standard or determined by the second device, and the second parameter is determined based on the power offset.

[0221] In some embodiments, the first parameter is a power value configured or indicated by the first network device to the second device; or, the first parameter is a preconfigured power value; or, the first parameter is a power value specified by the standard; or, the first parameter is a power value that depends on the implementation of the second device; or, the first parameter is determined based on the path loss between the first device and the second device.

[0222] In some embodiments, the second parameter is equal to the power offset; or, the second parameter is equal to the sum of the power offset and the power offset received by the second device last time; or, the second parameter is equal to the sum of the power offset and the second parameter calculated by the second device last time.

[0223] In some embodiments, the receiving module 1310 is configured to receive first information sent by a first device, where the first information includes a first power offset; or receive second information sent by a first network device, where the second information includes a second power offset.

[0224] In some embodiments, the second device is a second terminal device or a second network device.

[0225] Please refer to Figure 14, which shows a block diagram of a power control device provided by another embodiment of the present application. This device has the function of implementing the power control method on the first network device side described above. This function can be implemented by hardware or by hardware executing corresponding software. This device can be the first network device described above, or it can be set in the first network device. As shown in Figure 14, the device 1400 can include: a receiving module 1410 and a sending module 1420.

[0226] The receiving module 1410 is configured to receive first information sent by a first device, where the first information includes the measured received power, or the first information includes a first power offset;

[0227] The sending module 1420 is configured to send second information to a second device, where the second information is determined based on the first information, and includes a second power offset.

[0228] It should be noted that, when the device provided in the above embodiment realizes its function, it only uses the division of the above-mentioned functional modules as an example. In actual application, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0229] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

[0230] Please refer to Figure 15, which shows a schematic diagram of the structure of a communication device provided by one embodiment of the present application. The terminal device 1500 may include: a processor 1501, a transceiver 1502, and a memory 1503. The transceiver 1502 is used to implement transmission or reception functions, such as the functions of the transmission module and / or reception module described above. The processor 1501 may be used to implement other processing functions or control transmission and / or reception, such as the functions of the processing module described above.

[0231] The processor 1501 includes one or more processing cores. The processor 1501 executes various functional applications and information processing by running software programs and modules.

[0232] The transceiver 1502 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0233] The memory 1503 may be connected to the processor 1501 and the transceiver 1502 .

[0234] The memory 1503 may be used to store a computer program executed by the processor, and the processor 1501 is used to execute the computer program to implement the various steps performed by the terminal device in the above method embodiment.

[0235] In some embodiments, the communication device is a first device, and the transceiver 1502 is configured to send first information, where the first information includes measured received power, or the first information includes a first power offset.

[0236] In some embodiments, the communication device is a second device, and the transceiver 1502 is further configured to receive a power offset. The processor 1501 is configured to determine a transmit power according to the power offset.

[0237] In some embodiments, the communication device is a first network device, and the transceiver 1502 is also used to receive first information sent by the first device, where the first information includes the measured received power, or the first information includes a first power offset; and send second information to the second device, where the second information is determined based on the first information, and the second information includes a second power offset.

[0238] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0239] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0240] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the power control method on the first device side, or to implement the power control method on the second device side, or to implement the power control method on the first network device side. In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or optical disks, etc. Among them, random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0241] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the power control method on the first device side, or implement the power control method on the second device side, or implement the power control method on the first network device side.

[0242] An embodiment of the present application also provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the power control method on the first device side, or the power control method on the second device side, or the power control method on the first network device side.

[0243] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0244] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0245] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0246] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0247] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0248] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0249] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0250] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0251] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A power control method, characterized in that: The method is performed by a first device, and includes: First information is sent, where the first information includes the measured received power, or the first information includes a first power offset.

2. The method according to claim 1, characterized in that The received power is measured based on transmissions from an A-IOT device to the first device.

3. The method according to claim 2, characterized in that The received power is the received power of the modulated signal sent by the A-IOT device.

4. The method according to claim 1, wherein The received power is measured based on the carrier.

5. The method according to claim 4, characterized in that The received power is the received power measured within a frequency range corresponding to the carrier sent by the second device.

6. The method according to claim 1, characterized in that The received power is measured based on a first frequency range.

7. The method according to claim 6, characterized in that The first frequency range is the frequency range for uplink transmission of the A-IOT device.

8. The method according to claim 6 or 7, characterized in that The first frequency range includes a modulated signal sent by the A-IOT device and / or a carrier sent by the second device.

9. The method according to any one of claims 1 to 8, characterized in that In a case where the first information includes the first power offset, the method further includes: The first power offset is determined according to the received power.

10. The method according to claim 9, characterized in that When the received power is greater than, equal to, or greater than a first threshold, the first power offset is a negative number or 0; and / or, When the received power is less than or less than or equal to a first threshold, the first power offset is a positive number or 0; The first threshold is configured by the network, or pre-configured, or depends on the implementation of the first device, or is a preset value specified by the standard.

11. The method according to any one of claims 1 to 10, characterized in that The sending of the first information includes: Sending the first information to a first network device, so that the first network device determines a second power offset according to the first information, and sends the second power offset to a second device; or, The first information is sent to the second device.

12. The method according to any one of claims 1 to 11, characterized in that The first device is a first terminal device.

13. A power control method, characterized in that: The method is performed by a second device, and includes: Receive power offset; The transmit power is determined according to the power offset.

14. The method according to claim 13, characterized in that The determining the transmit power according to the power offset includes: The transmit power of the carrier is determined according to the power offset.

15. The method according to claim 13 or 14, characterized in that The transmit power is determined according to at least one of the following: a first parameter and a second parameter, wherein the first parameter is a power value specified by a configuration or standard or determined by the second device, and the second parameter is determined according to the power offset.

16. The method according to claim 15, characterized in that The first parameter is a power value configured or indicated by the first network device to the second device; or, The first parameter is a preconfigured power value; or, The first parameter is a power value specified by the standard; or, The first parameter is a power value that depends on the power achieved by the second device; or, The first parameter is determined according to a path loss between the first device and the second device.

17. The method according to claim 15 or 16, characterized in that The second parameter is equal to the power offset; or, The second parameter is equal to the sum of the power offset and the power offset last received by the second device; or, The second parameter is equal to the sum of the power offset and the second parameter calculated by the second device last time.

18. The method according to any one of claims 13 to 17, characterized in that The received power offset includes: receiving first information sent by a first device, where the first information includes a first power offset; or, Second information sent by the first network device is received, where the second information includes a second power offset.

19. The method according to any one of claims 13 to 18, characterized in that The second device is a second terminal device or a second network device.

20. A power control method, characterized in that: The method is performed by a first network device, and the method includes: receiving first information sent by a first device, where the first information includes measured received power, or the first information includes a first power offset; Second information is sent to a second device, where the second information is determined based on the first information, and the second information includes a second power offset.

21. A power control device, characterized in that: The device comprises: The sending module is used to send first information, where the first information includes the measured received power, or the first information includes a first power offset.

22. A power control device, characterized in that: The device comprises: A receiving module, configured to receive a power offset; A processing module is used to determine the transmission power according to the power offset.

23. A power control device, characterized in that: The device comprises: a receiving module, configured to receive first information sent by a first device, where the first information includes the measured received power, or the first information includes a first power offset; A sending module is configured to send second information to a second device, where the second information is determined based on the first information, and the second information includes a second power offset.

24. A communication device, characterized in that: The communication device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 19, or the method according to claim 20.

25. A computer-readable storage medium, characterized in that The storage medium stores a computer program, which is used to be executed by a processor to implement the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 19, or the method according to claim 20.

26. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and when the chip is running, it is used to implement the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 19, or the method according to claim 20.

27. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 12, or the method according to any one of claims 13 to 19, or the method according to claim 20.

Images