Transmitting power control method and device and communication equipment

Abstract

The invention discloses a transmitting power control method and device and communication equipment, and belongs to the technical field of communication, and the transmitting power control method comprises the steps that first equipment executes first operation, and the first operation comprises at least one of the following items: the first equipment determines target transmitting power; the first device sends a first parameter to a second device, wherein the first parameter is used for calculating a parameter related to target transmitting power; the first device sends target transmitting power to a second device; wherein the target transmitting power is the power of a second device for transmitting a first signal, and the second device is an environmental Internet of Things (AIoT) device.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a transmission power control method, apparatus, and communication device. Background Art

[0002] In the transmission power control methods in the related art, they are designed based on multi-carrier signals such as Orthogonal Frequency Division Multiplexing (OFDM) or Discrete Fourier Transform-Spread OFDM (DFT-S-OFDM), and under the assumption of a topological structure where a User Equipment (UE) is directly connected to a base station or an Integrated Access and Backhaul (IAB) node.

[0003] In Backscatter Communication (BSC), Ambient Internet of Things (AIoT) devices may use single-carrier signals such as On-Off Keying (OOK), Amplitude Shift Keying (ASK), and Frequency-Shift Keying (FSK). Moreover, the connection topological structure in BSC is not limited to a simple directly-connected topological structure. Therefore, the transmission power control methods in the related art cannot be applied to the power control of AIoT devices. The lack of power control for AIoT devices will limit the communication performance of AIoT devices. Summary of the Invention

[0004] Embodiments of this application provide a transmission power control method, apparatus, and communication device, which can perform power control on signals transmitted by AIoT devices and improve the communication performance of AIoT devices.

[0005] In a first aspect, a transmission power control method is provided. The method includes:

[0006] A first device performs a first operation, and the first operation includes at least one of the following:

[0007] The first device determines a target transmission power;

[0008] The first device sends a first parameter to a second device, where the first parameter is a parameter related to calculating the target transmission power;

[0009] The first device sends the target transmission power to the second device;

[0010] Wherein, the target transmission power is the power for the second device to transmit a first signal, and the second device is an Ambient Internet of Things (AIoT) device.

[0011] In a second aspect, a transmission power control device is provided, which is applied to the first device. The device includes:

[0012] A first execution module, configured to execute a first operation, where the first operation includes at least one of the following:

[0013] Determine the target transmission power;

[0014] Send a first parameter to the second device, where the first parameter is a parameter related to calculating the target transmission power;

[0015] Send the target transmission power to the second device;

[0016] Wherein, the target transmission power is the power for the second device to transmit a first signal, and the second device is an Ambient Internet of Things (AIoT) device.

[0017] In a third aspect, a transmission power control method is provided, and the method includes:

[0018] The second device obtains first information, and the second device is an AIoT device;

[0019] The second device determines the target transmission power according to the first information;

[0020] The second device transmits the first signal according to the target transmission power;

[0021] Wherein, the first information includes at least one of the following:

[0022] A first parameter, where the first parameter is a parameter related to calculating the target transmission power;

[0023] The target transmission power.

[0024] In a fourth aspect, a transmission power control device is provided, which is applied to the second device. The device includes:

[0025] A first acquisition module, configured to acquire first information, and the second device is an AIoT device;

[0026] A first determination module, configured to determine the target transmission power according to the first information;

[0027] A signal transmission module, configured to transmit the first signal according to the target transmission power;

[0028] Wherein, the first information includes at least one of the following:

[0029] A first parameter, which is a parameter related to calculating the target transmit power;

[0030] The target transmit power.

[0031] In a fifth aspect, a communication device is provided. The communication device includes a processor and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the first aspect or the third aspect are implemented.

[0032] In a sixth aspect, a communication device is provided, including a processor and a communication interface;

[0033] Wherein, when the communication device is a first device, the communication interface or the processor is used to perform a first operation, and the first operation includes at least one of the following:

[0034] The first device determines the target transmit power;

[0035] The first device sends a first parameter to a second device, where the first parameter is a parameter related to calculating the target transmit power;

[0036] The first device sends the target transmit power to the second device;

[0037] Wherein, the target transmit power is the power for the second device to transmit a first signal, and the second device is an ambient Internet of Things (AIoT) device;

[0038] When the communication device is a second device, the processor is used to obtain the first information, and the second device is an AIoT device; the processor is further used to determine the target transmit power according to the first information; the communication interface is used to transmit the first signal according to the target transmit power;

[0039] Wherein, the first information includes at least one of the following:

[0040] A first parameter, which is a parameter related to calculating the target transmit power;

[0041] The target transmit power.

[0042] In a seventh aspect, a wireless communication system is provided, including a first device and a second device. Wherein, the first device is used to perform the steps of the method described in the first aspect, and the second device is used to perform the steps of the method described in the third aspect.

[0043] In an eighth aspect, a readable storage medium is provided, on which a program or instructions are stored, and when the program or instructions are executed by a processor, the steps of the method described in the first aspect or the third aspect are implemented.

[0044] In a ninth aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method described in the first aspect or the third aspect.

[0045] In a tenth aspect, a computer program / program product is provided, the computer program / program product is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the method described in the first aspect or the third aspect.

[0046] In an embodiment of the present application, the first device performs at least one of the following: determining the target transmission power of the first signal by the AIoT device (i.e., the second device), sending the first parameter to the AIoT device, and sending the target transmission power to the AIoT device, which can implement power control over the first signal transmitted by the AIoT device, making the target transmission power of the first signal by the AIoT device more flexible and improving the communication performance of the AIoT device. Description of the Drawings

[0047] Figure 1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application can be applied;

[0048] Figure 2 is a schematic diagram of a backscatter communication system;

[0049] Figure 3 is a schematic diagram of signal modulation in a backscatter communication system;

[0050] Figure 4 is a schematic diagram of a generation framework of a multi-carrier OOK signal based on an OFDM architecture;

[0051] Figure 5 is a schematic diagram of offset-Quadrature Phase Shift Keying (O-QPSK) transmission and spreading sequences;

[0052] Figure 6 is a schematic diagram of Differential Binary Phase Shift Keying (DBPSK) modulation and spreading sequences;

[0053] Figure 7It is a block diagram of Minimum Shift Keying (MSK) modulation;

[0054] Figure 8 It is a schematic diagram of the modulation principle of Gaussian Filtered Minimum Shift Keying (GMSK) signal;

[0055] Figure 9a It is a schematic diagram of the connection topology 1 of an AIoT device;

[0056] Figure 9b It is a schematic diagram of the connection topology 2 of an AIoT device;

[0057] Figure 9c It is one of the schematic diagrams of the connection topology 3 of an AIoT device;

[0058] Figure 9d It is the second schematic diagram of the connection topology 3 of an AIoT device;

[0059] Figure 9e It is a schematic diagram of the connection topology 4 of an AIoT device;

[0060] Figure 10 It is one of the flowcharts of a transmission power control method provided by an embodiment of the present application;

[0061] Figure 11 It is a schematic diagram of the Power Spectral Density (PSD) of OOK signals in different situations in an embodiment of the present application;

[0062] Figure 12 It is the second flowchart of a transmission power control method provided by an embodiment of the present application;

[0063] Figure 13 It is one of the structural schematic diagrams of a transmission power control device provided by an embodiment of the present application;

[0064] Figure 14 It is the second structural schematic diagram of a transmission power control device provided by an embodiment of the present application;

[0065] Figure 15 It is a structural schematic diagram of a communication device provided by an embodiment of the present application;

[0066] Figure 16 It is a structural schematic diagram of a terminal provided by an embodiment of the present application;

[0067] Figure 17 It is a structural schematic diagram of a network-side device provided by an embodiment of the present application;

[0068] Figure 18 It is a schematic structural diagram of another network-side device provided by an embodiment of the present application. Detailed implementation manners

[0069] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art shall fall within the protection scope of the present application.

[0070] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0071] The term "indication" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly tells the receiver specific information, operations to be performed, request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0072] It should be noted that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), or other systems such as 6G systems and 6G evolution systems, as well as IEEE 802.11 systems (i.e., WiFi systems), Bluetooth systems, Long Range Radio (LoRa), Zigbee systems, wireless optical communication, backscatter communication, low-power Internet of Things systems and other communication systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6 th Generation, 6G) communication system.

[0073] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc., terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0074] The core network device may include, but is not limited to, at least one of the following: core network nodes, core network functions, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0075] To facilitate the understanding of the transmit power control method provided in the embodiments of this application, the following related technologies will be explained first:

[0076] I. Backscatter Communication (BSC)

[0077] Backscatter communication refers to the backscatter communication device using radio frequency signals in other devices or the environment for signal modulation to transmit its own information.

[0078] In some embodiments, a backscatter communication device may include at least one of the following:

[0079] Device A, which refers to the backscatter communication device in traditional Radio Frequency Identification (RFID). Generally, it is a tag and belongs to a Passive-IoT device;

[0080] Device B, which refers to a semi-passive IoT device. Such devices have a certain amplification ability for downlink reception or uplink reflection;

[0081] Device C, which refers to a device with active transmission ability (active device). Such IoT devices can send signals to a reader without relying on the reflection of incident signals.

[0082] The energy source of the above backscatter communication devices can come from the environment, such as ambient Radio Frequency (RF) signals, thermal energy, kinetic energy, wind energy, etc. They can also be called Ambient IoT devices.

[0083] In some embodiments, as Figure 2 shown, a simple implementation of backscatter communication is as follows: when the tag needs to send '1', the tag reflects the incident carrier signal; when the tag needs to send '0', it does not reflect.

[0084] In some embodiments, as Figure 3 shown, the backscatter communication device controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. Among them, the reflection coefficient Γ of the signal can be calculated using the following formula:

[0085] Γ=(Z_1 - Z_0) / (Z_1 + Z_0)=|Γ|e^(jθ_T)

[0086] where Z_0 is the antenna characteristic impedance and Z_1 is the load impedance. Assuming the incident signal is S_in(t), the output signal is S_out(t)=S_in(t)|Γ|e^(jθ_T). Therefore, corresponding amplitude modulation, frequency modulation, or phase modulation can be achieved by reasonably controlling the reflection coefficient.

[0087] II. Modulation Methods That May Be Used for Low-Power Signals

[0088] 1) OOK

[0089] For the OOK modulation method, there are two generation methods. One is the multi-carrier (MultiCarrierOOK, MC-OOK) signal based on the OFDM architecture, and the other is the single-carrier OOK signal.

[0090] For the multi-carrier OOK signal based on the OFDM architecture, its design idea is not to change the transmitting end architecture of the existing base station. Therefore, appropriate data is sent on the OFDM subcarriers to make it present a square wave signal in the time domain, and its generation framework is as Figure 4 shown.

[0091] For the single-carrier OOK signal, it controls the turning on and off of the incident carrier or continuous wave (CW) with a unipolar non-return-to-zero code sequence. Its modulation method is simple and suitable for low-power signals.

[0092] 2) O-QPSK or DBPSK

[0093] For the active tag, offset quadrature phase shift keying (O-QPSK) or differential binary phase shift keying (DBPSK) modulation can be used to send data. These two modulation methods belong to the constant envelope modulation technology, and the introduction of these two modulation methods is as follows:

[0094] The modulation process of O-QPSK can be described as follows: The serially input binary data stream is divided into two different paths for transmission, namely the I path and the Q path. Among them, "I" is the component that is "in-phase" with the data waveform, and "Q" is the part that is "orthogonal" to the data waveform. That is, the even bits of the original input data are assigned to the I path, and the odd bits are assigned to the Q path, and it is ensured that the code streams of the in-phase and orthogonal branches are staggered by half a symbol period in time. After that, the carrier is modulated with the data of the I path and the Q path respectively, that is, one of the four discrete phase changes is used to represent a symbol (a pair of bits) to be transmitted.

[0095] BPSK is similar to QPSK, both using phase to carry symbol information. For example, when the input symbol is "1", the output of the baseband modulator is 1 (phase 0 degrees); when the input symbol is "0", the output of the baseband modulator is -1 (phase 180 degrees). However, BPSK has a phase ambiguity problem. The so-called phase ambiguity means that the recovered digital information will change from "0" to "1" or from "1" to "0", resulting in an incorrect recovery. This phenomenon of incorrect recovery in the receiving system due to the inversion of the local reference carrier is called the "phase ambiguity" phenomenon. To solve this problem, differential coding is introduced, so that the decoding at the receiving end is judged according to the change of the phase, rather than according to the absolute value of the phase. This is DBPSK.

[0096] It is worth noting that in order to obtain better link performance and anti-interference performance, the original bit information is extended by means of extended sequences and / or coding. Common processing methods include, for example, Figure 5 the O-QPSK transmission and extended sequence shown in Figure 6 , and the DBPSK modulation and extended sequence shown in

[0097] 3) MSK and GMSK Modulation

[0098] Minimum Shift Keying (MSK) is a constant envelope continuous phase modulation, and its modulation method is developed from binary Frequency Shift Keying (FSK) modulation. In FSK, the carrier frequency changes randomly with the modulation signal, which is usually "0" or "1", and the phase after modulation is discontinuous. If the phase is continuous, it is called Continuous Phase Frequency Shift Keying (CP-FSK). The so-called MSK modulation method is a special form of CP-FSK, and its modulation index is 0.5. The MSK modulation principle can be expressed by the following formula:

[0099]

[0100] Let where θ k is called the additional phase function to ensure the phase continuity between different symbols, ω c t is the carrier angular frequency, T s is the symbol width; a k is the phase constant of the k-th symbol. The modulation block diagram of MSK is as shown in Figure 7 .

[0101] Since the phase path of MSK is a curve, and it is observed from the spectrum analyzer that the side lobes of its power spectrum deviate from the center frequency and the attenuation is slow. Therefore, a Gaussian filter is added before MSK modulation to make up for the shortcomings of MSK, so as to achieve the purpose of improving the attenuation performance. Therefore, this modulator is called Gaussian Minimum Shift Keying (GMSK). As can be seen from the GMSK signal modulation principle diagram shown in Figure 8 , GMSK modulation is to add a Gaussian low-pass filter before the MSK modulator, so that the signal is smoother and the side lobe attenuation performance of the power spectrum is significantly improved. After MSK modulation, the symbol data, that is, the I channel and the Q channel, come out, and finally the GMSK expression is as follows:

[0102]

[0103] Among them, A represents the signal envelope, ω c represents the carrier angular frequency, represents the information phase.

[0104] III. Classification and Characteristics of AIoT Devices in 3GPP

[0105] In the AIoT research of 3GPP R19, environmental IoT devices are characterized according to their energy storage capacity and the ability to generate radio frequency signals for transmission. The AIoT device has one of the following energy storage capabilities:

[0106] Storage Capacity 1: No ability to store energy;

[0107] Storage Capacity 2: Energy can be stored up to E1 or E2 joules, where it is possible that E1 = E2;

[0108] Storage Capacity 3: Energy can be stored up to E2 joules.

[0109] Relying on these storage capacities, the research considered the following set of environmental IoT devices:

[0110] Device A: No energy storage, no independent signal generation / amplification, i.e., backscatter transmission;

[0111] Device B: Has energy storage, no independent signal generation, i.e., backscatter transmission. The use of stored energy can include amplification of the reflected signal;

[0112] Device C: Has energy storage, has independent signal generation, i.e., active radio frequency components for transmission.

[0113] The AIoT devices in the embodiments of this application may specifically include, but are not limited to, at least one of the following devices: Wearable Device, Vehicle User Equipment (VUE), shipborne equipment, Pedestrian User Equipment (PUE), smart home devices (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.).

[0114] IV. Connection Topology and Deployment Scenarios of AIoT Devices

[0115] 1) As Figure 9a shown, in the connection topology 1 of the AIoT device, the AIoT device and the Base Station (BS) establish a two-way direct connection.

[0116] 2) As Figure 9bAs shown in the connection topology 2 of the AIoT device, a two-way connection is established between the AIoT device and an intermediate node, which can be a relay node, an IAB node, a User Equipment (UE), a repeater, etc. The intermediate node transmits the data and / or signaling of the AIoT device to the base station, or the intermediate node transmits the data and / or signaling of the base station to the AIoT device.

[0117] 3) As Figure 9c and Figure 9d shown in the connection topology 3 of the AIoT device, the AIoT device sends data / signaling to the base station and receives data / signaling from an auxiliary node; or the AIoT device receives data / signaling from the base station and sends data / signaling to an auxiliary node. Among them, the auxiliary node can be a relay, an IAB node, a UE, a repeater, etc.

[0118] 4) As Figure 9e shown in the connection topology 4 of the AIoT device, a two-way direct connection is established between the AIoT device and the UE.

[0119] V. Power Control of NR

[0120] The NR protocol defines the power control of the uplink channel or signal (e.g., Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Sounding Reference Signal (SRS), and Physical Random Access Channel (PRACH)).

[0121] 1) Power Control of PUSCH:

[0122] If the UE configures the parameter set with index j and the PUSCH power control process with index l, and transmits the PUSCH on the active uplink (UL) bandwidth part (BWP) b of the carrier f in the serving cell c, then the UE will determine the PUSCH transmission power P PUSCH,b,f,c (i, j, q d , l) as:

[0123]

[0124] Among them, the parameter j is used to represent the parameter configuration index of open-loop power control (for example, j = 0 represents PUSCH in RACH, j = 1 represents PUSCH related to Configured Grant, and j >= 2 represents PUSCH of dynamic grant), and the parameter l is used to represent the process index of closed-loop power control, q d represents the reference signal index. P CMAX,f,c (i) is the maximum transmit power of the UE at time i, which is defined for the carrier and cell; P O_PUSCH,b,f,c (j) is the target received power (on a resource block (RB) with a 15 kHz subcarrier spacing (SCS)) of the open-loop control configuration index j, which is defined for the BWP, carrier, and cell; PL b,f,c (q d ) is the estimated downlink path loss of the UE using the reference signal q d , which is defined for the BWP, carrier, and cell; α b,f,c (j) is the partial path loss compensation factor defined by the open-loop control configuration index j, which is defined for the BWP, carrier, and cell; Δ TF,b,f,c (i) defines the transmit power required for each RE of the UE at time i, which is defined for the BWP, carrier, and cell, and is only used for single-layer transmission and is 0 for multi-layer transmission; is the number of RBs of PUSCH at time i. Combining with the SCS determines the total bandwidth of PUSCH, which is defined for the BWP, carrier, and cell; f b,f,c (i, l) is the bias value introduced by the closed-loop power control process l at time i, which is the sum of the power adjustment values indicated by the transmit power control (TPC) commands at past times, that is, where δ PUSCH,b,f,c (m, l) is the power adjustment value indicated by the m-th TPC command of the l-th closed-loop power control process, all of which are defined for the BWP, carrier, and cell. 2) Power control for PUCCH:

[0125] If the UE uses the PUCCH power control process with index l and sends PUCCH on the active UL BWP b of the carrier f in the primary cell c, then the UE determines the PUCCH transmit power P PUCCH,b,f,c (i, q u , q d , l) in the PUCCH transmission opportunity i as:

[0126]

[0127] Among them, qu is the index of PUCCH (the UE may need to transmit multiple PUCCHs simultaneously).

[0128] It should be noted that the power control of the above PUCCH and the power control of PUSCH include the following differences:

[0129] i) There is no partial path loss compensation factor;

[0130] ii) P O_PUCCH,b,f,c (q u ) is the target received power of the q u th PUCCH, which is defined for the BWP, carrier, and cell;

[0131] iii) Δ F_PUCCH (F) represents the power control offset that needs to be introduced for different PUCCH formats (F). For example, if the power control offset for different PUCCH formats is introduced, then Δ F_PUCCH (F0) corresponds to PUCCH format 0, Δ F_PUCCH (F1) corresponds to PUCCH format 1, Δ F_PUCCH (F2) corresponds to PUCCH format 2, Δ F_PUCCH (F3) corresponds to PUCCH format 3, Δ F_PUCCH (F4) corresponds to PUCCH format 4; otherwise, Δ F_PUCCH (F) = 0.

[0132] iv) g b,f,c (i, l) is the offset value introduced by the closed-loop power control process l at time i, which is the sum of the power adjustment values indicated by the TPC command at past times.

[0133] 3) Power control for SRS:

[0134] If the UE uses the SRS power control process with index l and transmits SRS based on the configuration of the SRS resource set on the active UL BWP b of the carrier f in the serving cell c, then the UE determines the SRS transmission power P SRS,b,f,c (i, q s , l) in the SRS transmission opportunity i as:

[0135]

[0136] where PL b,f,c (q d ) represents the estimated downlink path loss based on the reference signal q d .

[0137] It should be noted that the power control of the above SRS and the power control of the PUSCH include the following differences:

[0138] i) P O_SRS,b,f,c (q s ) is the SRS target received power of the q s th SRS resource set, which is defined for the BWP, carrier, and cell;

[0139] ii) M SRS,b,f,c (i) is the number of RBs of the SRS at time i. Combining with the SCS determines the total bandwidth of the SRS, which is defined for the BWP, carrier, and cell;

[0140] iii) α SRS,b,f,c (q s ) is the partial path loss compensation factor of the SRS resource set q s , which is defined for the BWP, carrier, and cell;

[0141] iv) h b,f,c (i, l) is the bias value introduced by the closed-loop power control process l at time i, which can be the same as the power control bias value of the PUSCH, or (when there is no PUSCH transmission) is the sum of the power adjustment values indicated by the TPC commands at past times.

[0142] 4) Power control for the PRACH:

[0143] The UE determines the transmission power P of the physical random access channel (PRACH) on the active UL BWP b of the carrier f of cell c based on the downlink (DL) reference signal (RS) of cell c in the transmission occasion i. PRACH,b,f,c It is defined as:

[0144] P PRACH,b,f,c (i) = min{P CMAX,f,c (i), P PRACH,target,f,c + PL b,f,c}

[0145] It should be noted that the power control of the above PRACH and the power control of the PUSCH include the following differences:

[0146] i) P PRACH,target,f,c is the target received power of the PRACH, which is given by the parameter: PREAMBLE_RECEIVED_TARGET_POWER and is defined for the BWP, carrier, and cell;

[0147] ii) PL b,f,cIt is the downlink path loss estimated by the UE using the uniquely associated reference signal (referenceSignalPower – higher layer filtered RSRP in dBm), which is defined for the BWP, carrier, and cell.

[0148] As can be seen from the above, the transmit power control method defined by NR is designed based on the assumption of multi-carrier signals such as OFDM / DFT-S-OFDM and the direct connection topology between the UE and gNB / IAB. However, AIoT devices may use single-carrier signals such as OOK / ASK / FSK, and the connection topology is not limited to the simple direct connection topology. For example, it may be the separated architecture of Topology 3. Therefore, the transmit power control method in the related art is not applicable to the power control of AIoT devices.

[0149] For example: The power control of PUSCH, PUCCH, and SRS needs to consider the signal format, that is, the bandwidth occupied by the signal (number of RBs and SCS), and the number of bits per resource element (Bits PerRE). The occupied bandwidth is calculated based on the assumption of OFDM signals. However, AIoT devices may need to use new signals, and possible signal types include: OOK, ASK, FSK, GMSK, O-QPSK, DBPSK, etc., and these signals are all single-carrier modulated signals. The actual occupied bandwidth of different signals and the number of bits required for each symbol will affect the calculation of the transmission power. The power calculation formula of NR in the related art is calculated based on the 15kHz OFDM signal, and it cannot be directly used for the power calculation of single-carrier signals. Therefore, there is a lack of a transmit power control method for AIoT devices in the related art.

[0150] Among them, the definition of single-carrier modulation is: a modulation technique that uses only one carrier within a fixed frequency band. For single-carrier modulation, a symbol can carry at most 2 orthogonal signals (divided into I and Q channels). When the symbol rate and transmission pulse are fixed, the bandwidth occupied by the single-carrier signal is also fixed. For example, assuming a double-sideband ASK signal, if the transmission pulse is an ideal time-domain sinc signal, then the bandwidth occupied by the signal is 1 / T s where T s is the time width of 1 pulse and also the time length of 1 modulation symbol.

[0151] In the embodiments of the present application, based on the transmission signal and topology structure characteristics of AIoT devices, a transmit power control method for AIoT devices is provided.

[0152] The following will, in conjunction with the accompanying drawings, elaborate on the transmission power control method, transmission power control device, and related equipment provided by the embodiments of the present application through some embodiments and their application scenarios.

[0153] Referring to Figure 10 , a transmission power control method provided by an embodiment of the present application, the execution subject of which is a first device, such as Figure 10 shown, the transmission power control method includes the following steps:

[0154] Step 101, the first device performs a first operation, and the first operation includes at least one of the following:

[0155] The first device determines the target transmission power;

[0156] The first device sends a first parameter to the second device, and the first parameter is a parameter related to calculating the target transmission power;

[0157] The first device sends the target transmission power to the second device;

[0158] Among them, the target transmission power is the power for the second device to transmit the first signal, and the second device is an Ambient Internet of Things (AIoT) device.

[0159] Among them, the above-mentioned first device is a device for determining the target transmission power of the second device, and the second device is an AIoT device capable of actively transmitting the first signal, such as Device C.

[0160] In some implementation manners, the first device and the second device may be the same device. When the first device and the second device are the same device, the AIoT device itself determines the target transmission power and transmits the first signal according to the target transmission power.

[0161] In some other implementation manners, the first device and the second device are different devices. For example: the first device may be a network-side device (access network device or core network device) or a third device, where the third device is a receiving device for the first signal sent by the second device. The third device may be Figures 9a to 9e an intermediate node, a base station, a User Equipment (UE), an auxiliary node in

[0162] In some embodiments, the first device may include a core network device. In this case, demand information such as the target received power can be obtained by using an application server in the core network, or the target transmit power can be calculated by using the computing function in the core network.

[0163] When the first device and the second device are different devices, the first device needs to send the determined target transmit power to the second device so that the second device sends the first signal according to the target transmit power, or the first device needs to send the first parameter to the second device so that the second device calculates the target transmit power based on the first parameter and sends the first signal according to the target transmit power.

[0164] In some embodiments, the first signal may be a single-carrier signal, such as the signals modulated by the modulation methods of OOK, ASK, FSK, GMSK, O-QPSK, and DBPSK listed above.

[0165] In some embodiments, the topology of the second device may be as Figure 9a in Figure 9e any one of the topologies shown.

[0166] In the embodiments of the present application, the first device performs at least one of the following: determining the target transmit power of the first signal for the AIoT device (i.e., the second device), sending the first parameter to the AIoT device, and sending the target transmit power to the AIoT device, which can achieve power control of the first signal transmitted by the AIoT device, make the target transmit power of the first signal for the AIoT device more flexible, and improve the communication performance of the AIoT device.

[0167] In some embodiments, the first parameter includes at least one or a combination of at least two of the following parameters:

[0168] Target received power, first path loss, maximum transmit power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of RBs of the occupied bandwidth of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmit power;

[0169] Wherein, the first path loss is the path loss between the second device and the third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

[0170] It should be noted that the connection topology based on AIoT devices is different from the direct connection topology based on OFDM signals in the related art. The definition and measurement method of the above first path loss are different from those of the path loss of OFDM signals in the related art. In addition, the type of the above first signal, the time length of a symbol, the frequency domain width of a symbol, the number of RBs occupied by the occupied bandwidth, the number of subcarriers included in each RB, and the number of bits carried by each symbol on average are different from the signal-related parameters used in calculating the uplink power of channels or signals such as PUSCH, PUCCH, SRS, and PRACH in the related art.

[0171] Based on the above differences from calculating the uplink power of channels or signals such as PUSCH, PUCCH, SRS, and PRACH in the related art, the target transmit power of the first signal transmitted by the second device can be calculated based on the following two methods:

[0172] Method 1: Convert the relevant parameters of the first signal into the parameters of an OFDM signal, and substitute the converted parameters into the uplink power calculation formula in the related art to calculate the target transmit power of the first signal.

[0173] As an optional implementation manner, the determination of the target transmit power by the first device includes:

[0174] The first device obtains the first parameter and converts the first parameter into a second parameter based on a target orthogonal frequency division multiplexing (OFDM) signal;

[0175] The first device determines the target transmit power according to the second parameter;

[0176] Among them, the second parameter includes:

[0177] The maximum transmit power of the second device;

[0178] The target receive power of the equivalent target OFDM signal corresponding to the open-loop power control configuration;

[0179] The number of RBs of the occupied bandwidth B of the first signal;

[0180] The first path loss;

[0181] The transmit power required by the second device for each resource element (RE);

[0182] The bias value of the closed-loop power control.

[0183] It should be noted that the above first parameter represents the parameter of the first signal, the above second parameter represents the parameter based on the target OFDM signal, and the second parameter is obtained by converting the first parameter.

[0184] For example: Assume that the first signal is a single - carrier signal, and the target OFDM signal refers to an OFDM signal with a sub - carrier spacing (SCS) of 2 μ ×15 kHz, then the second parameter is the parameter of an OFDM signal with an SCS equivalent to that of the single - carrier signal and an SCS of 2 μ ×15 kHz.

[0185] In this embodiment, the conversion of the first parameter to a second parameter based on the target orthogonal frequency - division multiplexing (OFDM) signal includes at least one of the following:

[0186] 1) Calculate the actual occupied bandwidth B of the signal according to the single - carrier signal type and symbol rate;

[0187] 2) Based on an OFDM signal with an SCS of 2 μ ×15 kHz, calculate the number of resource blocks (RBs) occupied by the signal

[0188] In some embodiments, if an OFDM signal with an SCS of 15 kHz is used as a reference, it is easy to calculate

[0189] For example: For an on - off keying (OOK) signal, if the signal pulse selects an ideal sinc signal, then the signal bandwidth is 1 / T s , that is If an ideal sinc signal is not selected, such as truncation, then the signal bandwidth can also be determined according to the actual power spectral density (PSD). For example, Figure 11 as shown in, select the width of the first main lobe as the signal bandwidth B, and then calculate

[0190] 3) Calculate the average number of bits γ carried by each symbol according to the number of symbols actually carrying data and the total amount of data.

[0191] In some embodiments, during the calculation of γ, symbols that do not carry information and overhead symbols can be excluded from the total symbols. For example, in a frame (regarded as a data channel), there are 10 symbols, but 2 symbols do not transmit signals, 2 symbols are used for delimiters / dummy data, etc., and the other 6 symbols carry a total of 30 bits. Then γ for this data channel is 30 / 6 = 5 bits.

[0192] In other embodiments, during the calculation of γ, only symbols that do not carry information (such as delimiters) are excluded, while at least some overhead symbols (such as preambles, dummy data) are retained. The information transmitted by this part of the overhead symbols does not carry data bits, but will carry control bits or fixed known bits.

[0193] In this embodiment, by converting the parameters of the single-carrier signal into parameters based on the target OFDM signal, the target transmission power of the single-carrier signal can be calculated using the uplink power calculation method of the OFDM signal in the related art.

[0194] In some embodiments, the first device determines the target transmission power according to the second parameter, including:

[0195] The first device determines the target transmission power based on the following formula according to the second parameter:

[0196]

[0197] where P represents the target transmission power; P CMAX represents the maximum transmission power of the second device; P O represents the target received power of the equivalent target OFDM signal on one RB; represents the number of RBs of the occupied bandwidth B of the first signal; PL represents the first path loss; Δ TF represents the transmission power required by the second device for each resource element RE; f represents the offset value of the closed-loop power control.

[0198] In some embodiments, Δ TF is determined based on the following formula:

[0199]

[0200] where γ represents the average number of bits carried by each symbol; γ′ represents the average number of bits carried by each RE; represents the number of OFDM subcarriers included in one RB; β 0 and β 1 are offset values.

[0201] It should be noted that γ obtains the average number of bits on each single-carrier symbol, while Δ in the OFDM power control calculation formula in the related art TF is defined according to the average number of bits carried by one RE. Therefore, γ also needs to be divided by to obtain the average number of bits carried by each RE.

[0202] Optionally, the above target transmission power may specifically refer to the target transmission power of the first signal calculated based on the reference signal q, the l-th closed-loop power control process, the i-th symbol / transmission time, and the j-th open-loop control configuration. For simplicity, the i, j, q, and l parameters are omitted in the formula for calculating the target transmission power in the embodiments of the present application.

[0203] For example: at the i-th symbol / transmission time of the first signal, the j-th open-loop control configuration, based on the reference signal q, the target transmit power on the l-th closed-loop power control process can be calculated based on the following formula:

[0204]

[0205] where P O (j) is the same as the NR definition in the related art and is the target received power of the equivalent OFDM signal on one RB with 15 kHz SCS;

[0206]

[0207]

[0208] where represents the number of OFDM subcarriers included in one RB, generally 12;

[0209] β 0 and β 1 are two bias values related to the transmission channel (data / signaling), modulation method, etc., which can be constants or functions of j and l. Among them, l is the power control process index; j is the open-loop control configuration index; β 0 and β 1 are optional parameters. In the embodiments of the present application, if a certain parameter is optional, it means that the power adjustment does not change with this parameter (for example: when β 0 and β 1 take the value of 1, it is equivalent to not taking effect).

[0210] f(i, l) is the bias value introduced by the closed-loop power control process l at time i. It can be indicated by the signaling of the absolute value or by the network side indicating the difference value, and the UE obtains the absolute value through cumulative summation. Optionally, if the closed-loop power control has not taken effect, such as when the TPC signaling has not been received or before the connection is established, f(i, l) may not exist, and at this time there is only open-loop power control.

[0211] Optionally, the above target transmit power can also be defined for the BWP b, carrier f, and cell c. For simplicity, the b, f, and c parameters are also omitted in the formula for calculating the target transmit power in the embodiments of the present application.

[0212] Method 2: Design an uplink power calculation formula for the first signal, and substitute the relevant parameters of the first signal into this formula to calculate the target transmit power of the first signal.

[0213] As an alternative implementation, the first device determines the target transmit power, including:

[0214] The first device determines the target transmit power based on the first parameter according to the following formula:

[0215] P = min{P CMAX , P O,S + PL + Δ TF,S + f};

[0216] wherein, P O,S represents the target received power on one single-carrier symbol; Δ TF,S represents the transmit power required by the second device for each single-carrier symbol.

[0217] In some embodiments, since the single-carrier signals that may be modulated at each moment are different, therefore, P O,S can take the average power of the first signal, or take the sum of the powers accumulated over a fixed bandwidth from the power spectral density of the first signal as P O,S .

[0218] For example: Assume the first signal is an OOK / ASK signal. If there are two modulation symbols, 0 and 1, which appear with equal probability, then the average power is 0.5.

[0219] For another example: Calculate based on the calculated / measured power spectral density (PSD) of the random signal. As Figure 11 shows the PSD of the OOK signal under different conditions. It can be seen that the PSD may extend beyond the bandwidth of the signal. At this time, according to a certain criterion, the sum of the powers accumulated in a certain bandwidth region can be selected as P O,S , such as only selecting the region within the first main lobe for power accumulation.

[0220] In some embodiments, Δ TF,S is determined based on the following formula:

[0221]

[0222] wherein, T s represents the time length of one single-carrier symbol; B represents the frequency-domain width of one single-carrier symbol; β 2 and β 3 are two offset values.

[0223] Optionally, the above target transmit power may specifically refer to the target transmit power of the first signal calculated based on the i-th symbol / transmission time, the j-th open-loop control configuration, the reference signal q, and the l-th closed-loop power control process. For simplicity, the above i, j, q, and l parameters are omitted in the formula for calculating the target transmit power in the embodiments of the present application.

[0224] For example, the target transmit power of the first signal at the i-th symbol / transmission time, the j-th open-loop control configuration, based on the reference signal q, and the l-th closed-loop power control process can be calculated based on the following formula:

[0225] P(i,j,q,l) = min{P CMAX (i), P O,S (j) + PL(q) + Δ TF,S + f(i,l)}

[0226] where, P O,S (j) is defined as the target received power on one single-carrier symbol, independent of the bandwidth but related to the modulation mode, such as defined as the average power under a certain modulation mode, the power within the 3dB bandwidth of the average power spectral density, etc.;

[0227]

[0228]

[0229] T s is the time length of one single-carrier symbol;

[0230] B is the frequency-domain width of one single-carrier symbol;

[0231] Generally, T s B = 1, but in high spectral efficiency communications, it may be made that T s B < 1;

[0232] β 2 and β 3 are two bias values related to the transmission channel (data / signaling), modulation mode, etc., which can be constants or functions of j and l, such as β 2 (i,j), β 3 (i,j), defined by the network side or the protocol. β 2 and β 3 are optional parameters. In the embodiments of the present application, that a certain parameter is optional means that the power adjustment does not change with this parameter (for example: when β 2 and β 3 take the value of 1, it is equivalent to not taking effect).

[0233] In this embodiment, when the first signal is a single-carrier signal, based on the characteristics of the single-carrier signal, a calculation formula for the uplink transmission power applicable to the single-carrier signal is defined. In this way, the parameters of the single-carrier signal can be directly substituted into the above formula to calculate the transmission power of the single-carrier signal.

[0234] In some embodiments, when the first signal is a signal transmitted based on a control channel, or the first signal is a reference signal, the first device determines the target transmission power, including:

[0235] The first device determines the target transmission power based on the following formula according to the parameter:

[0236] P = min{P CMAX , P O' + PL + f}

[0237] where P O' represents the target received power related to the channel, and P O' corresponds to the transmission format of the first signal.

[0238] It should be noted that, compared with the data channel, the transmission length and transmission format of the control channel and the reference signal change less. Therefore, for the calculation formula of the target transmission power of the control channel and the reference signal, a flexible transmission format may not be defined. For example, only fixed loads and fixed reference signal formats are considered. In this way, based on the previous embodiment, the calculation formula of the target transmission power of the control channel and the reference signal can be simplified.

[0239] It is worth noting that P O' corresponding to the transmission format of the first signal can be understood as: P O' includes the power difference caused by the transmission format of the first signal. For example, several P O' parameters corresponding to the transmission formats are defined, and which P O' parameter is adopted is determined according to the transmission format of the first signal.

[0240] In some embodiments, when the first signal is a signal transmitted based on a data channel, the following formula can be used to calculate the target transmission power:

[0241] P = min{P CMAX , P O,S + PL + Δ TF,S + f};

[0242] When the first signal is a signal transmitted based on a control channel, or the first signal is a reference signal, the following formula can be used to calculate the target transmission power:

[0243] P = min{P CMAX , P O' + PL + f}。

[0244] In some other embodiments, the target transmit power for the reference signal, the signal transmitted based on the control channel, and the signal transmitted based on the data channel can all be calculated using the following formula:

[0245] P = min{P CMAX , P O,S + PL + Δ TF,S + f}。

[0246] Similar to the formula for calculating the target transmit power P = min{P CMAX , P O,S + PL + Δ TF,S + f} defined in the previous embodiment, the formula P = min{P CMAX , P O' + PL + f} can also specifically refer to the target transmit power of the first signal calculated for the i-th symbol / transmission time, the j-th open-loop control configuration, based on the reference signal q, and the l-th closed-loop power control process. For simplicity, the above i, j, q, l parameters are omitted in the formula for calculating the target transmit power in the embodiments of the present application.

[0247] For example: when the first signal is a signal transmitted based on the control channel, or the first signal is a reference signal, the target transmit power of the first signal at the i-th symbol / transmission time, the j-th open-loop control configuration, based on the reference signal q, and the l-th closed-loop power control process can be calculated based on the following formula:

[0248] P(i, j, q, l) = min{P CMAX (i), P O,Control / RS (j) + PL(q) + f(i, l)}

[0249] Wherein, P O,Control / RS (j) is the target received power related to the channel, and the power difference caused by the transmission format has been taken into account. In some embodiments, if the closed-loop power control has not taken effect, or when the TPC signaling has not been received, or before the connection is established, f(i, l) may not exist, and only open-loop power control is available at this time.

[0250] Optionally, the above target transmit power can also be defined for BWP b, carrier f, and cell c. For simplicity, the b, f, c parameters are also omitted in the formula for calculating the above target transmit power.

[0251] In some embodiments, the power loss caused by the first path loss can be compensated based on open-loop power control, and in different topologies, the path loss of the first signal has different meanings.

[0252] 1) In connection topology 1 as shown in Figure 9a , connection topology 2 as shown in Figure 9b , and connection topology 4 as shown in Figure 9e , for Device C, the path loss of the first signal it transmits is the one-way path loss. For example, the path loss from the AIoT device to the UE / gNB / auxiliary node is PL AIoT->UE / gNB , then the actual path loss of the first signal is PL AIoT->UE / gNB , and this value can be calculated by the AIoT device receiving the reference signal sent by the UE / gNB / auxiliary node. For example, the power of the Synchronization Signal and PBCH block (or Synchronization Signal Block, SSB) / Channel State Information Reference Signal (CSI-RS) sent by the UE / gNB / auxiliary node is P SSB / CSI-RS , and the Reference Signal Received Power (RSRP) (which may be L1 or L3-filtered) measured by the AIoT device is P measured , then the path loss rate parameter PL = P measured / P SSB / CSI-RS , and then converted to dB to obtain the first path loss.

[0253] Optionally, for connection topology 2, assume that the relay therein is a regenerative relay, that is, only consider the path loss between the auxiliary node and the AIoT device, and the path loss between the auxiliary node and the network side is compensated by the auxiliary node itself.

[0254] 2) For connection topologies 3 as shown in Figure 9c and as shown in Figure 9d , the nodes for the AIoT device and the network side to perform uplink and downlink transmissions are different. At this time, the uplink and downlink path losses are asymmetric.

[0255] Taking the example as shown in Figure 9cTaking the connection topology 3 shown as an example, for Device C, the path loss for uplink power control should be the path loss from Device C to the uplink signal receiving node (BS). This part of the path loss cannot be measured by the reference signal sent by the downlink signal transmitting node (assisting node), and can only be measured by the reference signal sent by the uplink signal receiving node. If the uplink signal receiving node cannot send a reference signal, then Device C cannot perform open-loop power control at this time.

[0256] In some embodiments, during the open-loop power control process, the measurement methods of the first path loss may include the following two:

[0257] 1) The second device measures the reference signal sent by the third device to obtain the first path loss.

[0258] 2) The second device sends a reference signal, and the third device measures the reference signal to obtain the first path loss.

[0259] In some embodiments, it can be determined which method to use to measure the first path loss according to whether the second device has the path loss measurement ability.

[0260] For example: when the second device has the path loss measurement ability, the third device sends a reference signal, and the second device measures the reference signal to obtain the first path loss; when the second device does not have the path loss measurement ability, the second device sends a reference signal, and the third device measures the reference signal to obtain the first path loss.

[0261] As an alternative embodiment, the method further includes:

[0262] The first device receives the first capability information from the second device;

[0263] The first device configures at least one of the path loss measurement parameters and part of the path loss compensation factors for the second device, wherein the path loss measurement parameters are used to measure the first path loss.

[0264] In some embodiments, the path loss measurement parameters and part of the path loss compensation factors can be jointly configured. For example:

[0265] The first device configures the nth configuration for the second device, and the nth configuration can be expressed as the nth path loss measurement configuration, and each nth path loss measurement configuration includes the above-mentioned path loss measurement parameters and part of the path loss compensation factors.

[0266] Of course, in some other embodiments, the path loss measurement parameter and the partial path loss compensation factor can be configured through two independent configuration processes, which are not specifically defined herein.

[0267] Optionally, the first capability information includes at least one of the following:

[0268] The type of the second device;

[0269] The reference signal measurement capability information of the second device, for example, whether the second device can measure path loss, RSRP, Reference Signal Received Quality (RSRQ), etc.

[0270] In some embodiments, based on the type of the second device, the first device can learn whether the AIoT device of this type has the ability to measure the first path loss.

[0271] In some other embodiments, the second device can directly indicate its own capabilities related to reference signal measurement through the first capability information.

[0272] In some embodiments, the path loss measurement parameter includes at least one of the following:

[0273] The second indication information, which is used to indicate whether to adopt open-loop power control;

[0274] The first association information, which is used to indicate the association relationship between each path loss and the reference signal;

[0275] The second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

[0276] In some embodiments, multiple backscatter communication networks include the same AIoT device. At this time, different backscatter communication networks correspond to different reference signals and path losses. In this embodiment, based on the first association relationship, it can be indicated which reference signal is used to measure each path loss. For example, the first association information can be the association relationship between the nth path loss and the nth reference signal.

[0277] In some embodiments, in a complex topological connection structure, the transmission path of the first signal may include at least three transmission nodes. At this time, different reference signals may be transmitted between different pairs of transmission nodes to measure the path loss between the corresponding pairs of transmission nodes based on the reference signal. At this time, the path loss of the first signal in this topological connection may include the sum of at least two path losses, and each path loss is measured based on its corresponding reference signal. In this embodiment, based on the second association information, it can be known which path losses measured based on the reference signals are summed to obtain the path loss of the first signal.

[0278] In this embodiment, based on the path loss measurement parameter, the second node is configured to compensate the first signal based on open-loop power control, improving the reliability of AIoT communication.

[0279] It is worth noting that in addition to open-loop power control, closed-loop power control can also be used to adjust the target transmit power. For example, in the case where the second device does not have the path loss measurement ability, closed-loop power control is used to adjust the target transmit power.

[0280] In some embodiments, the network side can directly configure the bias value of closed-loop power control for the AIoT device through a power control signaling (such as TPC command).

[0281] Optionally, the bias value of closed-loop power control can be an absolute value or a relative value (such as a small offset relative to the current power control parameter), which is not specifically limited here.

[0282] In this embodiment, in addition to power compensating the first signal based on open-loop power control, a method of power compensating the first signal based on closed-loop power control is proposed, improving the reliability of AIoT communication.

[0283] Refer to Figure 12 , the embodiment of the present application also provides another transmit power control method, and the execution subject of this another transmit power control method is the second device. As Figure 12 shown, the another transmit power control method executed by this second device includes the following steps:

[0284] Step 121, the second device obtains first information, and the second device is an AIoT device;

[0285] Wherein, the first information includes at least one of the following:

[0286] The first parameter, and the first parameter is a parameter related to calculating the target transmit power;

[0287] The target transmit power.

[0288] In some embodiments, the second device is the same device as the first device. In this case, the second device may determine the first information based on the previous method embodiment.

[0289] In some other embodiments, the second device is not the same device as the first device. In this case, the second device receives the above-mentioned first information from the first device.

[0290] Step 122: The second device determines a target transmit power according to the first information.

[0291] Step 123: The second device transmits a first signal according to the target transmit power.

[0292] It should be noted that the above-mentioned first information, first parameter, target transmit power, and first signal respectively have the same meanings and functions as the first information, first parameter, target transmit power, and first signal in the method embodiment on the first device side, and will not be elaborated here.

[0293] The embodiment of the present application corresponds to the method embodiment on the first device side. Among them, the method embodiment on the first device side is used to determine the target transmit power of the first signal, and the method embodiment on the second device side can control the transmit power of the first signal based on the first information, so as to realize the uplink transmit power control of the AIoT device.

[0294] In some embodiments, the first parameter includes at least one or a combination of at least two of the following parameters:

[0295] Target receive power, first path loss, maximum transmit power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of RBs of the occupied bandwidth B of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmit power;

[0296] Among them, the first path loss is the path loss between the second device and the third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power. The third device is used to receive the first signal.

[0297] In some embodiments, the first path loss is measured by the second device, and the method further includes:

[0298] The second device sends the first path loss to the first device.

[0299] In some embodiments, before the second device obtains the first information, the method further includes:

[0300] The second device sends first capability information to the first device;

[0301] The second device receives at least one of path loss measurement parameters and partial path loss compensation factors configured by the first device;

[0302] The second device measures the first path loss according to the path loss measurement parameters;

[0303] Wherein, the first capability information includes at least one of the following:

[0304] The type of the second device;

[0305] The reference signal measurement capability information of the second device.

[0306] In some embodiments, the path loss measurement parameters include at least one of the following:

[0307] First indication information, which is used to indicate whether to adopt open-loop power control or not;

[0308] First association information, which is used to indicate the association relationship between each path loss and the reference signal;

[0309] Second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

[0310] In some embodiments, when the second device does not support path loss measurement based on the reference signal, the method further includes:

[0311] The second device reflects the reference signal sent by the third device;

[0312] The second device receives third information or first signaling from the third device;

[0313] Wherein, the third information includes the path loss between the second device and the third device, or, the third information includes the path loss between the second device and the third device and partial path loss compensation factors; the first signaling carries the bias value of closed-loop power control.

[0314] In some embodiments, the first signaling may be a TPC signaling.

[0315] In this embodiment, the path loss of the first signal can be measured and compensated by means of closed-loop power control. That is, the third device sends a reference signal, the second device reflects the reference signal, and the third device measures the reference signal reflected by the second device to determine the first path loss according to the measurement result.

[0316] In the embodiments of the present application, the steps performed by the second device correspond to the steps performed by the first device in the method embodiment on the first device side, and the two cooperate with each other to jointly achieve uplink transmit power control and path loss compensation for the AIoT device.

[0317] In the embodiments of the present application, the execution subject of the transmit power control method may be a transmit power control device. In the embodiments of the present application, taking the transmit power control device executing the transmit power control method as an example, the transmit power control device provided in the embodiments of the present application is described.

[0318] Referring to Figure 13 , the embodiments of the present application further provide a transmit power control device, which is applied to the first device. As Figure 13 shown, the transmit power control device 1300 includes:

[0319] A first execution module 1301, configured to execute a first operation, where the first operation includes at least one of the following:

[0320] Determine the target transmit power;

[0321] Send a first parameter to the second device, where the first parameter is a parameter related to calculating the target transmit power;

[0322] Send the target transmit power to the second device;

[0323] Wherein, the target transmit power is the power of the second device to transmit the first signal, and the second device is an ambient Internet of Things AIoT device.

[0324] Optionally, the first parameter includes at least one or a combination of at least two of the following parameters:

[0325] Target receive power, first path loss, maximum transmit power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of RBs of the occupied bandwidth B of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmit power;

[0326] Wherein, the first path loss is the path loss between the second device and the third device, the first transmission power is the power obtained by excluding the first path loss from the target transmission power, and the third device is configured to receive the first signal.

[0327] Optionally, the transmit power control device 1300 further includes:

[0328] A first receiving module, configured to receive first capability information from the second device;

[0329] A configuration module, configured to configure at least one of path loss measurement parameters and partial path loss compensation factors for the second device, wherein the path loss measurement parameters are used to measure the first path loss;

[0330] Wherein, the first capability information includes at least one of the following:

[0331] The type of the second device;

[0332] The reference signal measurement capability information of the second device.

[0333] Optionally, the path loss measurement parameters include at least one of the following:

[0334] Second indication information, which is used to indicate whether to adopt open-loop power control;

[0335] First association information, which is used to indicate the association relationship between each path loss and the reference signal;

[0336] Second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

[0337] Optionally, the first execution module 1301 includes:

[0338] A first obtaining unit, configured to obtain the first parameter and convert the first parameter into a second parameter based on a target orthogonal frequency division multiplexing (OFDM) signal;

[0339] A first determining unit, configured to determine the target transmit power according to the second parameter;

[0340] Wherein, the second parameter includes:

[0341] The maximum transmit power of the second device;

[0342] The target receive power of the equivalent target OFDM signal corresponding to the open-loop power control configuration;

[0343] The number of resource blocks (RBs) of the occupied bandwidth B of the first signal;

[0344] The first path loss;

[0345] The transmission power required by the second device for each resource element (RE);

[0346] The bias value of the closed-loop power control.

[0347] Optionally, the first determination unit is specifically configured to:

[0348] Determine the target transmission power based on the following formula according to the second parameter:

[0349]

[0350] where P represents the target transmission power; P CMAX represents the maximum transmission power of the second device; P O represents the target received power of the target OFDM signal equivalent on 1 RB; represents the number of RBs of the occupied bandwidth B of the first signal; PL represents the first path loss; Δ TF represents the transmission power required by the second device for each resource element (RE); f represents the bias value of the closed-loop power control.

[0351] Optionally, Δ TF is determined based on the following formula:

[0352]

[0353] where, γ represents the number of bits carried by each symbol on average; γ′ represents the average number of bits carried by each RE; represents the number of OFDM subcarriers included in 1 RB; β 0 and β 1 are bias values.

[0354] Optionally, the first execution module 1301 is specifically configured to:

[0355] Determine the target transmission power based on the following formula according to the first parameter:

[0356] P = min{P CMAX , P O,S + PL + Δ TF,S + f};

[0357] where P O,S represents the target received power on 1 single-carrier symbol; Δ TF,S represents the transmission power required by the second device for each single-carrier symbol.

[0358] Optionally, ΔTF,S Determined based on the following formula:

[0359]

[0360] Wherein, T s represents the time length of a single - carrier symbol; B represents the frequency - domain width of a single - carrier symbol; β 2 and β 3 are two bias values.

[0361] Optionally, when the first signal is a signal transmitted based on a control channel, or the first signal is a reference signal, the first execution module 1301 is specifically configured to:

[0362] Determine the target transmit power based on the following formula according to the parameter:

[0363] P = min{P CMAX , P O' + PL + f}

[0364] Wherein, P O' represents the target received power related to the channel, and P O' corresponds to the transmission format of the first signal.

[0365] The transmit power control device 1300 provided in the embodiments of the present application can implement each process in the method embodiments on the first device side and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0366] Referring to Figure 14 , the embodiments of the present application further provide another transmit power control device 1400, which is applied to a second device. As Figure 14 shown, the transmit power control device 1400 includes:

[0367] A first acquisition module 1401, configured to acquire first information, where the second device is an AIoT device;

[0368] A first determination module, configured to determine the target transmit power according to the first information;

[0369] A signal transmission module, configured to transmit a first signal according to the target transmit power;

[0370] Wherein, the first information includes at least one of the following:

[0371] A first parameter, where the first parameter is a parameter related to calculating the target transmit power;

[0372] The target transmit power.

[0373] Optionally, the first parameter includes at least one or a combination of at least two of the following parameters:

[0374] Target received power, first path loss, maximum transmit power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of RBs of the occupied bandwidth B of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmit power;

[0375] Wherein, the first path loss is the path loss between the second device and the third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

[0376] Optionally, the first path loss is measured by the second device, and the transmit power control device 1400 further includes:

[0377] A first transmission module, configured to transmit the first path loss to a first device.

[0378] Optionally, the transmit power control device 1400 further includes:

[0379] A second transmission module, configured to transmit first capability information to the first device before the first acquisition module acquires first information;

[0380] A second reception module, configured to receive at least one of path loss measurement parameters and partial path loss compensation factors configured by the first device;

[0381] A measurement module, configured to measure the first path loss according to the path loss measurement parameters;

[0382] Wherein, the first capability information includes at least one of the following:

[0383] Type of the second device;

[0384] Reference signal measurement capability information of the second device.

[0385] Optionally, the path loss measurement parameters include at least one of the following:

[0386] First indication information, which is used to indicate whether to adopt open-loop power control;

[0387] First association information, which is used to indicate the association relationship between each path loss and the reference signal;

[0388] Second associated information, where the second associated information is used to indicate the association relationship between the target path loss and the reference signal.

[0389] Optionally, when the second device does not support path loss measurement based on the reference signal, the transmit power control device 1400 further includes:

[0390] A reflection module, configured to reflect the reference signal sent by the third device;

[0391] A third receiving module, configured to receive third information or a first signaling from the third device;

[0392] Wherein, the third information includes the path loss between the second device and the third device, or the third information includes the path loss between the second device and the third device and partial path loss compensation factors; the first signaling carries a bias value for closed-loop power control.

[0393] The transmit power determination device 1400 provided in the embodiments of the present application can implement each process in the method embodiments on the second device side and achieve the same technical effects. To avoid repetition, details are not described here again.

[0394] Optionally, as Figure 15 shown, the embodiments of the present application further provide a communication device 1500, including a processor 1501 and a memory 1502. A program or instruction that can run on the processor 1501 is stored on the memory 1502. For example, when the communication device 1500 is the first device, when the program or instruction is executed by the processor 1501, it implements each step of the foregoing method embodiments on the first device side and can achieve the same technical effects; when the communication device 1500 is the second device, when the program or instruction is executed by the processor 1501, it implements each step of the foregoing method embodiments on the second device side and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0395] The embodiments of the present application further provide a communication device, including a processor and a communication interface;

[0396] When the communication device is the first device, the communication interface or the processor is used to perform a first operation, and the first operation includes at least one of the following:

[0397] The first device determines the target transmit power;

[0398] The first device sends a first parameter to the second device, and the first parameter is a parameter related to calculating the target transmit power;

[0399] The first device sends the target transmit power to the second device;

[0400] Wherein, the target transmission power is the power of the second device for transmitting the first signal, and the second device is an Ambient Internet of Things (AIoT) device.

[0401] When the communication device is the second device, the processor is configured to obtain first information, where the second device is an AIoT device; the processor is further configured to determine the target transmission power according to the first information; and the communication interface is configured to transmit the first signal according to the target transmission power.

[0402] Wherein, the first information includes at least one of the following:

[0403] A first parameter, where the first parameter is a parameter related to calculating the target transmission power;

[0404] The target transmission power.

[0405] This embodiment of the communication device corresponds to the foregoing embodiments of the transmission power control methods on the first device side and the second device side. Each implementation process and implementation manner of the above method embodiments can be applied to this embodiment of the communication device and can achieve the same technical effects.

[0406] In some embodiments, Figure 16 It is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0407] The terminal 1600 includes, but is not limited to, at least some components such as a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, and a processor 1610.

[0408] Those skilled in the art can understand that the terminal 1600 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 1610 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 16 The terminal structure shown does not limit the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0409] It should be understood that in the embodiments of the present application, the input unit 1604 may include a Graphics Processing Unit (GPU) 16041 and a microphone 16042. The graphics processor 16041 processes the image data of static pictures or videos obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The display unit 1606 may include a display panel 16061, and the display panel 16061 may be configured in the form of, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 1607 includes at least one of a touch panel 16071 and other input devices 16072. The touch panel 16071 is also referred to as a touch screen. The touch panel 16071 may include two parts: a touch detection device and a touch controller. The other input devices 16072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated herein.

[0410] In the embodiments of the present application, after receiving downlink data from a network side device, the radio frequency unit 1601 may transmit it to the processor 1610 for processing; in addition, the radio frequency unit 1601 may send uplink data to the network side device. Generally, the radio frequency unit 1601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0411] The memory 1609 can be used to store software programs or instructions as well as various data. The memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1609 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1609 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0412] The processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 1610.

[0413] In one implementation, the terminal 1600 serves as the first device.

[0414] At this time, the processor 1610 is configured to execute a first operation, and the first operation includes at least one of the following:

[0415] The first device determines a target transmit power;

[0416] The first device sends a first parameter to the second device, where the first parameter is a parameter related to calculating the target transmit power;

[0417] The first device sends the target transmit power to the second device;

[0418] Wherein, the target transmit power is the power for the second device to transmit a first signal, and the second device is an Ambient Internet of Things (AIoT) device.

[0419] Optionally, the first parameter includes at least one or a combination of at least two of the following parameters:

[0420] Target receive power, first path loss, maximum transmit power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of resource blocks (RBs) of the occupied bandwidth B of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmit power;

[0421] Wherein, the first path loss is the path loss between the second device and a third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

[0422] Optionally, a radio frequency unit 1601 is configured to receive first capability information from the second device;

[0423] A processor 1610 is further configured to configure, through the radio frequency unit 1601, at least one of path loss measurement parameters and partial path loss compensation factors for the second device, where the path loss measurement parameters are used to measure the first path loss;

[0424] Wherein, the first capability information includes at least one of the following:

[0425] Type of the second device;

[0426] Reference signal measurement capability information of the second device.

[0427] Optionally, the path loss measurement parameters include at least one of the following:

[0428] Second indication information, where the second indication information is used to indicate whether to adopt open-loop power control or not;

[0429] First association information, where the first association information is used to indicate the association relationship between each path loss and a reference signal;

[0430] The second associated information, which is used to indicate the association relationship between the target path loss and the reference signal.

[0431] Optionally, the determining of the target transmit power performed by the processor 1610 includes:

[0432] Obtaining the first parameter and converting the first parameter into a second parameter based on the target orthogonal frequency division multiplexing (OFDM) signal;

[0433] Determining the target transmit power according to the second parameter;

[0434] Wherein, the second parameter includes:

[0435] The maximum transmit power of the second device;

[0436] The target receive power of the equivalent target OFDM signal corresponding to the open-loop power control configuration;

[0437] The number of resource blocks (RBs) of the occupied bandwidth B of the first signal;

[0438] The first path loss;

[0439] The transmit power required by the second device for each resource element (RE);

[0440] The bias value of the closed-loop power control.

[0441] Optionally, the determining of the target transmit power according to the second parameter performed by the processor 1610 includes:

[0442] Determining the target transmit power according to the second parameter based on the following formula:

[0443]

[0444] Wherein, P represents the target transmit power; P CMAX represents the maximum transmit power of the second device; P O represents the target receive power of the equivalent target OFDM signal on 1 RB; represents the number of RBs of the occupied bandwidth B of the first signal; PL represents the first path loss; Δ TF represents the transmit power required by the second device for each resource element RE; f represents the bias value of the closed-loop power control.

[0445] Optionally, Δ TF is determined based on the following formula:

[0446]

[0447] Wherein, γ represents the average number of bits carried by each symbol; γ′ represents the average number of bits carried by each RE. represents the number of OFDM subcarriers included in one RB; β 0 and β 1 are bias values.

[0448] Optionally, the determining of the target transmit power performed by the processor 1610 includes:

[0449] Determining the target transmit power based on the following formula according to the first parameter:

[0450] P = min{P CMAX , P O,S + PL + Δ TF,S + f};

[0451] wherein, P O,S represents the target received power on one single - carrier symbol; Δ TF,S represents the transmit power required by the second device on each single - carrier symbol.

[0452] Optionally, Δ TFS is determined based on the following formula:

[0453]

[0454] wherein, T s represents the time length of one single - carrier symbol; B represents the frequency - domain width of one single - carrier symbol; β 2 and β 3 are two bias values.

[0455] Optionally, when the first signal is a signal transmitted based on a control channel or the first signal is a reference signal, the determining of the target transmit power performed by the processor 1610 includes:

[0456] Optionally, determining the target transmit power based on the following formula according to the parameter:

[0457] P = min{P CMAX , P O' + PL + f}

[0458] wherein, P O' represents the target received power related to the channel, and P O' corresponds to the transmission format of the first signal.

[0459] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to the relevant descriptions of the method embodiment on the first device side described above, and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0460] In another embodiment, the terminal 1600 serves as the second device.

[0461] A processor 1610, configured to obtain first information, where the second device is an AIoT device;

[0462] The processor 1610 is further configured to determine a target transmission power according to the first information;

[0463] A radio frequency unit 1601, configured to transmit a first signal according to the target transmission power;

[0464] Wherein, the first information includes at least one of the following:

[0465] A first parameter, where the first parameter is a parameter related to calculating the target transmission power;

[0466] The target transmission power.

[0467] Optionally, the first parameter includes at least one or a combination of at least two of the following parameters:

[0468] The target reception power, the first path loss, the maximum transmission power of the second device, the type of the first signal, the time length of a symbol in the first signal, the frequency domain width of a symbol in the first signal, the bias value of closed-loop power control, the number of RBs of the occupied bandwidth B of the first signal, the number of subcarriers included in each RB of the first signal, the number of bits carried by each symbol in the first signal on average, the first transmission power;

[0469] Wherein, the first path loss is the path loss between the second device and the third device, and the first transmission power is the power obtained by excluding the first path loss from the target transmission power, and the third device is configured to receive the first signal.

[0470] Optionally, the first path loss is measured by the second device, and the radio frequency unit 1601 is further configured to send the first path loss to the first device.

[0471] Optionally, before the processor 1610 executes the obtaining of the first information:

[0472] The radio frequency unit 1601 is further configured to send first capability information to the first device;

[0473] The radio frequency unit 1601 is further configured to receive at least one of the path loss measurement parameters and partial path loss compensation factors configured by the first device;

[0474] The processor 1610 is further configured to control the radio frequency unit 1601 to measure the first path loss according to the path loss measurement parameter.

[0475] Wherein, the first capability information includes at least one of the following:

[0476] The type of the second device;

[0477] The reference signal measurement capability information of the second device.

[0478] Optionally, the path loss measurement parameter includes at least one of the following:

[0479] The first indication information, which is used to indicate whether to adopt open-loop power control or not;

[0480] The first association information, which is used to indicate the association relationship between each path loss and the reference signal;

[0481] The second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

[0482] Optionally, when the second device does not support path loss measurement based on the reference signal, the radio frequency unit 1601 is further configured to:

[0483] Reflect the reference signal sent by the third device;

[0484] Receive the third information or the first signaling from the third device;

[0485] Wherein, the third information includes the path loss between the second device and the third device, or, the third information includes the path loss between the second device and the third device and partial path loss compensation factors; the first signaling carries the offset value of closed-loop power control.

[0486] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to the relevant descriptions of the method embodiment on the second device side mentioned above, and achieve the same or corresponding technical effects. To avoid repetition, it will not be elaborated here.

[0487] This application embodiment further provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the steps of the method embodiment on the first device side or the second device side mentioned above. This network-side device embodiment corresponds to the method embodiment on the first device side or the second device side mentioned above. Each implementation process and implementation manner of the method embodiment can be applied to this network-side device embodiment, and the same technical effects can be achieved.

[0488] In one implementation, as Figure 17 shown, the network-side device 1700 includes: The network-side device 17000 includes: an antenna 1701, a radio frequency device 1702, a baseband device 1703, a processor 1704, and a memory 1705. The antenna 1701 is connected to the radio frequency device 1702. In the uplink direction, the radio frequency device 1702 receives information through the antenna 1701 and sends the received information to the baseband device 1703 for processing. In the downlink direction, the baseband device 1703 processes the information to be sent and sends it to the radio frequency device 1702. After processing the received information, the radio frequency device 1702 sends it out through the antenna 1701.

[0489] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 1703, and the baseband device 1703 includes a baseband processor.

[0490] The baseband device 1703 may include, for example, at least one baseband board, and a plurality of chips are arranged on the baseband board. As Figure 17 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1705 through a bus interface to call a program in the memory 1705 and execute the network device operations shown in the above method embodiments.

[0491] The network-side device may further include a network interface 1706, and the interface is, for example, a Common Public Radio Interface (CPRI).

[0492] In some implementations, the network-side device 1700 in the embodiments of the present application further includes: instructions or programs stored on the memory 1705 and executable on the processor 1704. The processor 1704 calls the instructions or programs in the memory 1705 to execute Figure 13 or Figure 14 the methods executed by the modules shown, and achieves the same technical effects. To avoid repetition, it will not be elaborated here.

[0493] In another implementation, the embodiments of the present application further provide a network-side device. As Figure 18 shown, the network-side device 1800 includes: a processor 1801, a network interface 1802, and a memory 1803. Among them, the network interface 1802 is, for example, a Common Public Radio Interface (CPRI).

[0494] Optionally, the network-side device 1800 in the embodiments of the present application further includes: instructions or programs stored on the memory 1803 and executable on the processor 1801. The processor 1801 calls the instructions or programs in the memory 1803 to executeFigure 13 The methods executed by the modules shown achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0495] The embodiments of the present application further provide a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, it implements each process of the foregoing first device-side method embodiment or the second device-side method embodiment and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0496] Among them, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0497] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement each process of the foregoing first device-side method embodiment or the second device-side method embodiment and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0498] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0499] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the foregoing first device-side method embodiment or the second device-side method embodiment and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0500] The embodiments of the present application further provide a wireless communication system, including a first device and a second device. Among them, the first device is used to execute the steps of the foregoing first device-side method embodiment, and the second device is used to execute the steps of the foregoing second device-side method embodiment and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0501] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0502] From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0503] The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the spirit of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A transmission power control method, characterized in that, it includes: The first device performs a first operation, and the first operation includes at least one of the following: The first device determines the target transmission power; The first device sends a first parameter to the second device, and the first parameter is a parameter related to calculating the target transmission power; The first device sends the target transmission power to the second device; wherein, the target transmission power is the power for the second device to transmit the first signal, and the second device is an Ambient Internet of Things (AIoT) device.

2. The method according to claim 1, characterized in that, The first parameter includes at least one or a combination of at least two of the following parameters: Target received power, first path loss, maximum transmission power of the second device, type of the first signal, time length of one symbol in the first signal, frequency domain width of one symbol in the first signal, bias value of closed-loop power control, number of resource blocks (RBs) of the occupied bandwidth B of the first signal, number of subcarriers included in each RB of the first signal, number of bits carried by each symbol in the first signal on average, first transmission power; wherein, the first path loss is the path loss between the second device and the third device, and the first transmission power is the power after excluding the first path loss from the target transmission power, and the third device is used to receive the first signal.

3. The method according to claim 2, characterized in that, The method further includes: The first device receives first capability information from the second device; The first device configures at least one of path loss measurement parameters and partial path loss compensation factors for the second device, wherein the path loss measurement parameters are used to measure the first path loss; wherein, the first capability information includes at least one of the following: Type of the second device; Reference signal measurement capability information of the second device.

4. The method according to claim 3, characterized in that, The path loss measurement parameters include at least one of the following: Second indication information, which is used to indicate whether to adopt open-loop power control or not; First association information, which is used to indicate the association relationship between each path loss and the reference signal; Second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

5. The method according to any one of claims 2 to 4, characterized in that, When the first device determines the target transmission power, it includes: The first device obtains the first parameter and converts the first parameter into a second parameter based on the target orthogonal frequency division multiplexing (OFDM) signal; The first device determines the target transmission power according to the second parameter; wherein, the second parameter includes: Maximum transmission power of the second device; Target received power of the equivalent target OFDM signal corresponding to the open-loop power control configuration; Number of RBs of the occupied bandwidth B of the first signal; The first path loss; Transmission power required by the second device for each resource element (RE); Bias value of closed-loop power control.

6. The method according to claim 5, wherein, the first device determines the target transmit power according to the second parameter, including: the first device determines the target transmit power according to the second parameter based on the following formula: Among them, P represents the target transmission power; P CMAX represents the maximum transmission power of the second device; P O represents the target received power of the equivalent target OFDM signal on 1 RB; represents the number of RBs of the occupied bandwidth B of the first signal; PL represents the first path loss; Δ TF represents the transmission power required by the second device for each resource element RE; f represents the bias value of the closed-loop power control.

7. The method according to claim 6, wherein, Δ TF Determined based on the following formula: Among them, γ represents the average number of bits carried by each symbol; γ′ represents the average number of bits carried by each RE; represents the number of OFDM subcarriers included in one RB; β 0 and β 1 are bias values.

8. The method according to any one of claims 2 to 4, wherein, the first device determines the target transmit power, including: the first device determines the target transmit power according to the first parameter based on the following formula: P = min{P CMAX , P O,S + PL + Δ TF,S + f}; Among them, P O,S represents the target received power on one single-carrier symbol; Δ TF,S represents the transmission power required by the second device for each single-carrier symbol.

9. The method according to claim 8, wherein, Δ TFS Determined based on the following formula: Among them, T s represents the time length of a single-carrier symbol; B represents the frequency-domain width of a single-carrier symbol; β 2 and β 3 are two bias values.

10. The method according to any one of claims 2 to 4, wherein, when the first signal is a signal transmitted based on a control channel or the first signal is a reference signal, the first device determines the target transmit power, including: the first device determines the target transmit power according to the one parameter based on the following formula: P = min{P CMAX , P O' + PL + f} where P O' represents the target received power related to the channel, and P O' corresponds to the transmission format of the first signal.

11. A transmit power control method, wherein, including: a second device obtains first information, and the second device is an AIoT device; the second device determines the target transmit power according to the first information; the second device transmits a first signal according to the target transmit power; wherein, the first information includes at least one of the following: a first parameter, where the first parameter is a parameter related to calculating the target transmit power; the target transmit power.

12. The method according to claim 11, wherein, the first parameter includes at least one or a combination of at least two of the following parameters: the target received power, the first path loss, the maximum transmit power of the second device, the type of the first signal, the time length of one symbol in the first signal, the frequency domain width of one symbol in the first signal, the bias value of closed-loop power control, the number of RBs of the occupied bandwidth B of the first signal, the number of subcarriers included in each RB of the first signal, the number of bits carried by each symbol in the first signal on average, the first transmit power; wherein, the first path loss is the path loss between the second device and a third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

13. The method according to claim 12, wherein, the first path loss is measured by the second device, and the method further includes: the second device sends the first path loss to a first device.

14. The method according to claim 13, wherein, before the second device obtains the first information, the method further includes: the second device sends first capability information to the first device; the second device receives at least one of the path loss measurement parameters and partial path loss compensation factors configured by the first device; the second device measures the first path loss according to the path loss measurement parameters; wherein, the first capability information includes at least one of the following: the type of the second device; the reference signal measurement capability information of the second device.

15. The method according to claim 14, wherein, the path loss measurement parameter includes at least one of the following: a first indication information, which is used to indicate whether to adopt open-loop power control; a first association information, which is used to indicate the association relationship between each path loss and the reference signal; a second association information, which is used to indicate the association relationship between the target path loss and the reference signal.

16. The method according to any one of claims 11 to 15, wherein, when the second device does not support path loss measurement based on the reference signal, the method further includes: the second device reflects the reference signal sent by the third device; the second device receives third information or a first signaling from the third device; wherein, the third information includes the path loss between the second device and the third device, or, the third information includes the path loss between the second device and the third device and a partial path loss compensation factor; the first signaling carries a bias value of closed-loop power control.

17. A transmit power determination device, wherein, applied to a first device, the device includes: a first execution module, configured to perform a first operation, and the first operation includes at least one of the following: determine a target transmit power; send a first parameter to a second device, where the first parameter is a parameter related to calculating the target transmit power; send the target transmit power to the second device; wherein, the target transmit power is the power for the second device to transmit a first signal, and the second device is an ambient Internet of Things (AIoT) device.

18. The device according to claim 17, wherein, the first parameter includes at least one or a combination of at least two of the following parameters: a target receive power, a first path loss, a maximum transmit power of the second device, a type of the first signal, a time length of one symbol in the first signal, a frequency domain width of one symbol in the first signal, a bias value of closed-loop power control, a number of resource blocks (RBs) of an occupied bandwidth B of the first signal, a number of subcarriers included in each RB of the first signal, a number of bits carried by each symbol in the first signal on average, a first transmit power; wherein, the first path loss is the path loss between the second device and a third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

19. The device according to claim 18, wherein, the device further includes: a first receiving module, configured to receive first capability information from the second device; a configuration module, configured to configure at least one of a path loss measurement parameter and a partial path loss compensation factor for the second device, where the path loss measurement parameter is used to measure the first path loss; wherein, the first capability information includes at least one of the following: a type of the second device; reference signal measurement capability information of the second device.

20. The device according to claim 18 or 19, It is characterized in that The first execution module includes: A first acquisition unit, configured to acquire the first parameter and convert the first parameter into a second parameter based on a target orthogonal frequency division multiplexing (OFDM) signal; A first determination unit, configured to determine a target transmit power according to the second parameter; Wherein, the second parameter includes: The maximum transmit power of the second device; The target receive power of an equivalent target OFDM signal corresponding to an open-loop power control configuration; The number of resource blocks (RBs) of the occupied bandwidth B of the first signal; The first path loss; The transmit power required by the second device for each resource element (RE); The bias value of closed-loop power control.

21. The apparatus according to claim 20, It is characterized in that The first determination unit is specifically configured to: Determine the target transmit power based on the following formula according to the second parameter: Among them, P represents the target transmit power; P CMAX represents the maximum transmit power of the second device; P O represents the target received power of the equivalent target OFDM signal on one RB; represents the number of RBs of the occupied bandwidth B of the first signal; PL represents the first path loss; Δ TF represents the transmit power required by the second device for each resource element RE; f represents the bias value of the closed-loop power control.

22. The apparatus according to claim 21, It is characterized in that Δ TF Determined based on the following formula: Among them, γ represents the average number of bits carried by each symbol; γ′ represents the average number of bits carried by each RE; represents the number of OFDM subcarriers included in one RB; β 0 and β 1 are bias values.

23. The apparatus according to claim 18 or 19, It is characterized in that The first execution module is specifically configured to: Determine the target transmit power based on the following formula according to the first parameter: P = min{P CMAX , P O,S + PL + Δ TF,S + f}; Among them, P O,S represents the target received power on one single-carrier symbol; Δ TF,S represents the transmit power required by the second device for each single-carrier symbol.

24. The apparatus according to claim 23, It is characterized in that Δ TF,S Determined based on the following formula: Among them, T s represents the time length of a single - carrier symbol; B represents the frequency - domain width of a single - carrier symbol; β 2 and β 3 are two bias values.

25. The apparatus according to claim 18 or 19, It is characterized in that When the first signal is a signal transmitted based on a control channel or the first signal is a reference signal, the first execution module is specifically configured to: Determine the target transmit power based on the following formula according to the one parameter: P = min{P CMAX , P O' + PL + f} where P O' represents a target received power related to a channel, and P O' corresponds to the transmission format of the first signal.

26. A transmit power control apparatus, It is characterized in that Applied to a second device, the apparatus includes: A first acquisition module, configured to acquire first information, where the second device is an AIoT device; A first determination module, configured to determine a target transmit power according to the first information; A signal transmission module, configured to transmit a first signal according to the target transmit power; Wherein, the first information includes at least one of the following: A first parameter, which is a parameter related to calculating the target transmit power; The target transmit power.

27. The apparatus according to claim 26, It is characterized in that The first parameter includes at least one or a combination of at least two of the following parameters: The target receive power, the first path loss, the maximum transmit power of the second device, the type of the first signal, the time length of a symbol in the first signal, the frequency domain width of a symbol in the first signal, the bias value of closed-loop power control, the number of resource blocks (RBs) of the occupied bandwidth B of the first signal, the number of subcarriers included in each RB of the first signal, the number of bits carried by each symbol in the first signal on average, the first transmit power; Wherein, the first path loss is the path loss between the second device and a third device, and the first transmit power is the power obtained by excluding the first path loss from the target transmit power, and the third device is used to receive the first signal.

28. The apparatus according to claim 27, It is characterized in that The first path loss is measured by the second device, and the apparatus further includes: A first sending module, configured to send the first path loss to a first device.

29. The apparatus according to claim 28, wherein, the apparatus further comprises: a second sending module, configured to send first capability information to the first device before the first obtaining module obtains first information; a second receiving module, configured to receive at least one of path loss measurement parameters and partial path loss compensation factors configured by the first device; a measurement module, configured to measure the first path loss according to the path loss measurement parameters; wherein the first capability information includes at least one of the following: the type of the second device; the reference signal measurement capability information of the second device.

30. The apparatus according to any one of claims 26 to 29, wherein, when the second device does not support path loss measurement based on a reference signal, the apparatus further comprises: a reflection module, configured to reflect a reference signal sent by a third device; a third receiving module, configured to receive third information or a first signaling from the third device; wherein the third information includes the path loss between the second device and the third device, or, the third information includes the path loss between the second device and the third device and partial path loss compensation factors; the first signaling carries a bias value of closed-loop power control.

31. A communication device, wherein, it comprises a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the transmit power control method according to any one of claims 1 to 10, or implements the steps of the transmit power control method according to any one of claims 11 to 16.

32. A readable storage medium, wherein, the readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, it implements the steps of the transmit power control method according to any one of claims 1 to 10, or implements the steps of the transmit power control method according to any one of claims 11 to 16.

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