Power control method and communication apparatus

Abstract

Provided in the embodiments of the present application are a power control method and a communication apparatus, which can implement power control over a terminal device in a passive IoT communication system under a UE-assisted architecture. The method comprises: a first apparatus sending a first carrier signal to a second apparatus, and receiving first information from a network device, wherein the first information is used for indicating the sending power of a second carrier signal, the first information has an association relationship with the receiving power of a first signal, and the first signal has an association relationship with the first carrier signal, such that the second carrier signal is sent to the second apparatus according to the sending power of the second carrier signal.

Description

Power control method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on July 24, 2023, with application number 202310918301.1 and application name “Power Control Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a power control method and a communication device. Background Art

[0003] Ambient Internet of Things (A-IoT) devices are a type of ultra-low-power IoT device, primarily categorized as active or passive. Active A-IoT devices are active tags or terminal devices that utilize the energy stored in their own energy storage modules to transmit wireless communication signals. Passive A-IoT devices (also known as passive tags) draw energy from external radio frequency signals and communicate via backscattered radio frequency signals, ultimately achieving ultra-low or even zero power consumption.

[0004] In the passive IoT network architecture of the terminal device assisted architecture, the link between the terminal device and the passive A-IoT is a passive link (passive link), which requires the terminal device to transmit an excitation or carrier signal (carrying downlink data). The passive A-IoT modulates the received excitation or carrier signal and reflects the modulated signal to the terminal device or network device. For the passive A-IoT, it needs to rely on the carrier signal sent by the terminal device to send uplink data to the network device, but it only contains the function of absorbing / reflecting signals. It cannot actively send radio frequency signals by itself, and does not have the ability to measure any signal quality such as reference signal received power (RSRP). Therefore, the passive A-IoT cannot feedback RSRP or even received signal strength indicator (RSSI) to the network side like traditional terminal devices, and thus cannot adjust the transmit power of the terminal device.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a power control method and a communication device, which can implement power adjustment of terminal devices in a passive IoT network architecture with terminal device auxiliary architecture.

[0007] To achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, a power control method is provided. The method can be executed by a first device, or by a component of the first device, such as a processor, chip, or chip system of the first device, or by a logic module or software that can realize all or part of the functions of the first device. The following description takes the method executed by the first device as an example. The method includes: the first device sends a first carrier signal to the second device. The first device receives first information from a network device. The first information is used to indicate the transmission power of the second carrier signal, the first information is associated with the reception power of the first signal, and the first signal is associated with the first carrier signal. The first device sends a second carrier signal to the second device based on the transmission power of the second carrier signal.

[0009] Based on this power control method, a first device receives first information from a network device indicating the power of a next transmitted carrier signal (e.g., a second carrier signal). This first information is related to the received power of the first signal, and the first signal is related to the carrier signal currently transmitted by the first device (e.g., the first carrier signal). Thus, the first device can control the power of the next transmitted carrier signal based on the first information. Thus, the network device, the first device, and the second device form a closed loop to control the power of the carrier signal transmitted by the first device, effectively reducing neighboring cell interference and improving communication reliability.

[0010] In one possible design, the first signal and the first carrier signal are associated, and this may include: the first signal is determined by the second device reflecting the received first carrier signal. In this embodiment of the application, reflection can be understood as modulating the received first carrier signal before transmitting it.

[0011] In one possible design scheme, the first information is used to indicate the transmission power of the second carrier signal, and may include: the first information is used to indicate at least one of a first path loss or a power adjustment amount or a power value.

[0012] In one possible design, the first path loss may include a path loss between the first device and the second device and a path loss between the second device and the network device. In this embodiment of the present application, the first path loss may be determined by comparing a power change between a transmit power of the first carrier signal and a receive power of the first signal.

[0013] In one possible design scheme, the first information can also be associated with at least one of the following: the bandwidth of the first carrier signal, the bandwidth of the second carrier signal, the bandwidth of the first signal, or the bandwidth of the second signal, wherein the second signal is determined by the second device reflecting the received second carrier signal.

[0014] In one possible design, the bandwidth of the first signal may be the same as the bandwidth of the first carrier signal.

[0015] In one possible design, the method provided in an embodiment of the present application may further include: the first device receives a reference signal from a network device. The first device determines the transmit power of the first carrier signal based on the receive power of the reference signal. The first device transmits the first carrier signal to the second device based on the transmit power of the first carrier signal. Based on this design, when the network device, the first device, and the second device have not yet formed closed-loop communication and are in an open-loop state, the power of the carrier signal transmitted by the first device can be determined based on the receive power of the reference signal transmitted by the network device, thereby enabling subsequent closed-loop power control.

[0016] In a second aspect, a power control method is provided. The method can be performed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device. It can also be implemented by a logic module or software that can implement all or part of the network device's functions. The following description uses the method performed by the network device as an example. The method includes: the network device receives a first signal from a second device. The network device measures the first signal and determines the received power of the first signal. The network device sends first information to the first device, the first information being associated with the received power of the first signal, and the first information being used to indicate the transmit power of the second carrier signal.

[0017] In one possible design scheme, the first information is used to indicate the transmission power of the second carrier signal, including: the first information is used to indicate at least one of a first path loss or a power adjustment amount or a power value.

[0018] In one possible design scheme, the first path loss may include the path loss between the first device and the second device and the path loss between the second device and the network equipment.

[0019] In one possible design scheme, the first information can also be associated with at least one of the following: the bandwidth of the first carrier signal, the bandwidth of the second carrier signal, the bandwidth of the first signal, or the bandwidth of the second signal, wherein the second signal is determined by the second device reflecting the received second carrier signal.

[0020] In one possible design, the bandwidth of the first signal may be the same as the bandwidth of the first carrier signal.

[0021] In a third aspect, a power control method is provided. The method can be performed by a second device, or by a component of the second device, such as a processor, chip, or chip system of the second device. It can also be implemented by a logic module or software that implements all or part of the functions of the second device. The following description uses the method performed by the second device as an example. The method includes: the second device receives a first carrier signal from a first device. The second device transmits a first signal to a network device, where the first signal is associated with the first carrier signal.

[0022] In one possible design solution, the first signal is associated with the first carrier signal, including: the first signal is determined by the second device reflecting the received first carrier signal.

[0023] In one possible design, the bandwidth of the first signal may be the same as the bandwidth of the first carrier signal.

[0024] In a fourth aspect, a power control method is provided. The method includes: a second device receives a first carrier signal from a first device and sends a first signal to a network device, where the first signal is associated with the first carrier signal. The network device measures the first signal and determines the received power of the first signal, where the received power of the first signal is associated with first information, where the first information is used to indicate the transmit power of the second carrier signal. The network device sends the first information to the first device. The first device receives the first information from the network device and sends a second carrier signal to the second device based on the transmit power of the second carrier signal.

[0025] In one possible design solution, the first signal is associated with the first carrier signal, including: the first signal is determined by the second device reflecting the received first carrier signal.

[0026] In one possible design scheme, the first information is used to indicate the transmission power of the second carrier signal, including: the first information is used to indicate at least one of a first path loss or a power adjustment amount or a power value.

[0027] In one possible design scheme, the first path loss may include the path loss between the first device and the second device and the path loss between the second device and the network equipment.

[0028] In one possible design scheme, the first information can also be associated with at least one of the following: the bandwidth of the first carrier signal, the bandwidth of the second carrier signal, the bandwidth of the first signal, or the bandwidth of the second signal, wherein the second signal is determined by the second device reflecting the received second carrier signal.

[0029] In one possible design, the bandwidth of the first signal may be the same as the bandwidth of the first carrier signal.

[0030] In one possible design, the method provided in an embodiment of the present application may further include: a first apparatus receiving a reference signal from a network device; the first apparatus determining a transmit power of a first carrier signal based on the received power of the reference signal; and the first apparatus transmitting the first carrier signal to a second apparatus based on the transmit power of the first carrier signal.

[0031] Among them, the technical effects of the methods described in any one of the second to fourth aspects can refer to the technical effects of the method described in the first aspect, and will not be repeated here.

[0032] In a fifth aspect, a communication device is provided for implementing the various methods described above. The communication device may be the first device described in the first aspect, or a device including the first device, or a device included in the first device, such as a chip. The communication device includes corresponding modules, units, or means for implementing the method described in the first aspect. The modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules or units corresponding to the above functions.

[0033] In some possible designs, the communication device includes: a processing module and a transceiver module. The processing module is used to control the transceiver module to send a first carrier signal to a second device. The processing module is also used to control the transceiver module to receive first information from a network device, where the first information is used to indicate the transmission power of the second carrier signal, the first information is associated with the reception power of the first signal, and the first signal is associated with the first carrier signal. The processing module is also used to control the transceiver module to send a second carrier signal to the second device based on the transmission power of the second carrier signal. For a more detailed description of the communication device, please refer to the description of the relevant method in the first aspect.

[0034] In a sixth aspect, a communication device is provided for implementing the various methods described above. The communication device may be the network device described in the second aspect, or a device including the network device described above, or a device included in the network device, such as a chip. The communication device includes corresponding modules, units, or means for implementing the method described in the second aspect. The modules, units, or means may be implemented in hardware, software, or by executing corresponding software implementations in hardware. The hardware or software includes one or more modules or units corresponding to the above functions.

[0035] In some possible designs, the communication device includes: a processing module and a transceiver module. The transceiver module is configured to receive a first signal from a second device. The processing module is configured to measure the first signal and determine a received power of the first signal. The transceiver module is further configured to send first information to the first device, the first information being associated with the received power of the first signal and indicating the transmit power of the second carrier signal. For a more detailed description of the communication device, reference can be made to the description of the relevant method in the second aspect.

[0036] In the seventh aspect, a communication device is provided for implementing the various methods described above. The communication device may be the second device in the third aspect, or a device including the second device, or a device included in the second device, such as a chip. The communication device includes corresponding modules, units, or means for implementing the method described in the third aspect. The modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules or units corresponding to the above functions.

[0037] In some possible designs, the communication device includes a processing module and a transceiver module. The processing module is configured to control the transceiver module to receive a first carrier signal from a first device. The processing module is further configured to control the transceiver module to transmit a first signal to a network device, the first signal being associated with the first carrier signal.

[0038] In conjunction with any one of aspects 5 to 7, in one possible design, the transceiver module may include a receiving module and a sending module. The sending module is configured to implement the sending function of the communication device described in any one of aspects 5 to 7, and the receiving module is configured to implement the receiving function of the communication device described in any one of aspects 5 to 7.

[0039] In conjunction with any one of aspects 5 to 7, in one possible design, the communication device described in any one of aspects 5 to 7 may further include a storage module storing a program or instruction. When the processing module executes the program or instruction, the communication device described in any one of aspects 5 to 7 may perform the method described in any one of aspects 1 to 3.

[0040] In an eighth aspect, a communication device (for example, the communication device may be a chip or a chip system) is provided. The communication device includes: a processor configured to implement the functions involved in any of the above aspects.

[0041] In one possible design, the communication device may further include a memory for storing necessary program instructions and data. A processor is coupled to the memory, and the processor is configured to execute the computer program or instructions stored in the memory, causing the communication device to perform the method described in any possible implementation of aspects 1 to 3.

[0042] In one possible design solution, the communication device described in the eighth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the eighth aspect to communicate with other communication devices.

[0043] In one possible design, the processor can be integrated with the memory.

[0044] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0045] In the ninth aspect, the present application provides a communication device, which includes a processor and an interface circuit, the interface circuit being used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor being used to implement the method described in any possible implementation method of the first to third aspects through logic circuits or execution code instructions.

[0046] It can be understood that when the communication device provided in either the eighth aspect or the ninth aspect is a chip, the above-mentioned sending action / function can be understood as output, and the above-mentioned receiving action / function can be understood as input.

[0047] In the tenth aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the first to third aspects above.

[0048] In the eleventh aspect, a computer program product containing instructions is provided, including computer program code, which, when the computer program code is run on a communication device, enables the communication device to execute the method described in any one of the first to third aspects above.

[0049] In the twelfth aspect, a communication system is provided, comprising a first device for implementing the method described in the first aspect, a network device for implementing the method described in the second aspect, and a second device for implementing the method described in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] FIG1 is a waveform diagram of an ASK modulation provided in an embodiment of the present application;

[0051] FIG2 is a schematic diagram of a PUSCH uplink power control scenario provided by an embodiment of the present application;

[0052] FIG3 is a schematic diagram of a sidelink power control scenario provided by an embodiment of the present application;

[0053] FIG4 is a schematic diagram of the architecture of a passive IoT communication system under a UE-assisted architecture provided by an embodiment of the present application;

[0054] FIG5 is a schematic diagram of the architecture of a power control system provided in an embodiment of the present application;

[0055] FIG6 is a schematic diagram of the architecture of a communication system applicable to a power control system according to an embodiment of the present application;

[0056] FIG7 is a schematic flow chart of a power control method provided in an embodiment of the present application;

[0057] FIG8 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0058] FIG9 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (Wi-Fi) systems, vehicle to everything (V2X) communication systems, vehicle network communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, world-wide interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems.

[0060] In order to better understand the embodiments of the present application, the following explanations are made before introducing the embodiments of the present application.

[0061] First, in the embodiments of the present application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing a certain "indication information" as being used to indicate A, it can include the indication information directly indicating A or indirectly indicating A, and does not necessarily mean that the indication information carries A.

[0062] The information indicated by the indication information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to use the arrangement order of each piece of information agreed in advance (such as specified in the protocol) to achieve the indication of specific information, thereby reducing the indication overhead to a certain extent. At the same time, it is also possible to identify the common parts of each piece of information and indicate them uniformly to reduce the indication overhead caused by indicating the same information separately.

[0063] In addition, the specific indication method can also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can be referred to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, there may be a situation where the indication methods for different information are different. In the specific implementation process, the required indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0064] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example, but not limited to, include one or a combination of at least two of radio resource control (RRC) signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC-control element (CE); physical (PHY) layer signaling, for example, includes downlink control information (DCI).

[0065] Second, in the embodiments of this application, the terms "first," "second," and various numerical numbers are merely distinctions for ease of description and are not intended to limit the scope of the embodiments of this application. For example, they distinguish different indication information. For another example, the terms "first network area" and "second network area" are merely for distinguishing different areas and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the number or order of execution, and that terms such as "first" and "second" do not necessarily define differences.

[0066] Third, in the embodiments of the present application, descriptions such as "when...", "in the case of...", "if" and "if" all mean that the device (such as a terminal device or a network device) will make corresponding processing under certain objective circumstances. It does not limit the time, nor does it require the device (such as a terminal device or a network device) to have a judgment action when implementing it, nor does it mean that there are other limitations.

[0067] Fourth, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0068] Fifth, in the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of multiple items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0069] Related technologies involved in the embodiments of this application.

[0070] 1. Passive A-IoT

[0071] Passive A-IoT is also known as passive tag, battery-free terminal / device, battery-free terminal / device, backreflective terminal / device, backscatter device, passive IoT, etc. Taking into account the low power consumption characteristics, the passive A-IoT receiver does not include high-power, high-precision phase-locked loops (PLL) and other modules. It cannot support coherent demodulation and does not have baseband signal processing capabilities, but supports basic radio frequency (RF) signal absorption and / or reflection capabilities. The passive A-IoT receiver itself cannot actively send RF signals. The terminal device must first transmit an excitation or carrier signal (carrying downlink (DL) data). The passive A-IoT receiver then modulates the received excitation or carrier signal and reflects the modulated signal to the terminal device or network device (carrying uplink (UL) data). For example, a passive A-IoT receiver is a receiver that supports RF on-off keying (OOK) modulation or amplitude-shift keying (ASK) modulation signals, or a backscatter receiver, or a receiver that can absorb / reflect RF signals, or a passive receiver.

[0072] In the embodiments of this application, the passive A-IoT receiver may also be referred to as a "zero-power receiver," "ultra-low-power receiver," "backscatter receiver," etc., without limitation. The RF signal used for backscattering may also be referred to as an "excitation signal," "carrier signal," "backscatter source signal," etc., without limitation.

[0073] 2. ASK / OOK modulation

[0074] ASK modulation adjusts the carrier amplitude based on the value of the digital signal, while maintaining the carrier frequency and phase. As shown in Figure 1, the transmitted digital signal is a binary signal consisting of 0s and 1s. Compared to the carrier signal (sinusoidal signal f(t) = Asin(2πft + θ)), the modulated signal transmits one amplitude signal when the bit is 1 (maintaining the carrier amplitude A unchanged), and transmits another amplitude signal when the bit is 0 (the amplitude becomes 0). Clearly, ASK modulation modulates one bit of data into one symbol. The modulated signal has two symbol waveforms, and can only transmit data of 1 and 0. 2ASK can also be called OOK.

[0075] 3. Power control (abbreviated as power control)

[0076] As electromagnetic wave signals propagate through wireless channels, they are affected by path loss (also known as path loss) and shadow fading, resulting in reduced signal strength upon reaching the receiver. Therefore, when the receiver is far away, the transmitter needs to appropriately adjust the signal transmission power to compensate for the effects of path loss and shadow fading. Furthermore, higher transmit power helps reduce the block error rate (BER) and packet loss rate (PLR), improving transmission reliability. It also facilitates the application of higher-order modulation and coding schemes (MCS) and improves spectral efficiency. However, if the transmitter uses too high a transmit power, it will cause significant interference to other simultaneous transmissions and consume a lot of energy, which is detrimental to energy conservation (especially battery life in terminal devices). Therefore, transmit power control is necessary to compensate for the effects of path loss and shadow fading, while also mitigating interference between co-frequency cells within the fifth generation (5G) network to meet network coverage and capacity requirements.

[0077] The following describes the relevant uplink power control process involved in NR.

[0078] (1) 5G NR uplink power control

[0079] In uplink power control, the base station calculates the UE's transmit power control (TPC) based on power control configuration parameters, user equipment (UE) feedback information, and base station measurement information. It then sends the TPC to the UE via downlink control information (DCI) in the physical downlink control channel (PDCCH). The UE maps the TPC to a power adjustment amount and determines the final uplink transmit power based on its own maximum transmit power, path loss, number of resource blocks (RBs), and transmission format.

[0080] On a certain uplink carrier of a certain cell, the actual transmit power of the UE is calculated as follows (if the UE is configured with multiple uplink carriers, each carrier is power controlled according to the following formula): P = min {P CMAX ,{P0(j)+α(j)*PL(q)}+f(l)+10lg(2 u M)+Δ TF}. Among them, P CMAX is the maximum uplink transmit power that matches the UE's power level; P0(j)+α(j)*PL(q) is open-loop power control, which mainly refers to power control related to radio resource control (RRC) high-level parameter configuration and partial path loss compensation. P0(j) is the base station's expected receive power level, α is the partial path loss compensation factor, α∈(0,1), PL(q) is the path loss estimate, q is the index of the reference signal used to measure the path loss (each reference signal is associated with a specific q value), and one is selected from a set of path loss estimates maintained by the UE; f(l) is closed-loop power control, which mainly refers to power control related to historical transmission power, and l is the index of the closed-loop power control adjustment amount; 10lg(2 u M)+Δ TF Δ is other adjustment variables, mainly referring to the power adjustment variables related to frequency domain resource allocation and link adaptation. M is the number of RBs allocated for this uplink transmission, u is the subcarrier spacing number, and when the subcarrier spacing (SCS) is 15 kilohertz (kHz), u = 0. If the SCS is doubled, the value of u is also increased by 1, that is, the transmission power is also doubled accordingly. Similarly, Δ TF The power control of each uplink channel or signal is implemented based on the above basic power control framework, and the specific details are not expanded here.

[0081] (2) NR physical uplink shared channel (PUSCH) uplink power control

[0082] The purpose of PUSCH power control is to reduce interference to neighboring cells and improve cell throughput, while ensuring data rates for cell-edge users. PUSCH power control is the process by which the base station adjusts the UE's uplink transmit power by adjusting the TPC.

[0083] When a UE initially accesses or switches to a new cell, it uses open-loop power control to calculate the initial transmit power based on the power parameters configured by the base station and the path loss measured by the UE. Figure 2 (a) illustrates PUSCH power control during initial access or handover.

[0084] During service continuity, the UE uses a combination of open-loop and closed-loop power control. This means that the UE calculates transmit power based on the power parameters configured by the base station and the path loss estimation results. It also adaptively adjusts the PUSCH transmit power based on the TPC indicated by the base station to adapt to changes in the PUSCH channel environment and service load. The specific process is shown in Figure 2 (b).

[0085] At this time, the PUSCH transmit power calculation formula is: P PUSCH (i) = min{P CMAX ,{P 0_PUSCH (j)+α PUSCH (j)*PL(q)}+f(l,i)+10lg(2 u M PUSCH (i))+Δ TF (i)}[dBm]. Where i is the number of the uplink time slot, P CMAX is the maximum uplink transmit power of UE, P 0_PUSCH (j)+α PUSCH (j)*PL(q) is the open-loop power control part, where P 0_PUSCH (j) is the base station's expected received power level per RB, α PUSCH(j) is the path loss compensation factor, PL(q) is the downlink path loss value estimated by the UE, and can be obtained, for example, from the RSRP measurement and transmit power of the synchronization signal and physical broadcast channel block (SSB) of the base station. RSRP reflects the received strength of the reference signal. The 3rd Generation Partnership Project (3GPP) defines RSRP as the linear average of the signal power (in watts, W) received by the UE on all resource elements (REs) carrying the reference signal within a certain orthogonal frequency division multiplexing (OFDM) symbol duration within the measurement bandwidth (generally converted to decibel relative to one milliwatt, dBm). It is used to indicate the strength, not the quality, of the cell's downlink reference signal and does not include noise and interference. For details, see section 5.1.1, Reference Signal Received Power (RSRP), of 3GPP TS 36.214 V17.0.0, or the relevant description in 3GPP TS 36.214 V17.0.0. 38.215V16.5.0, section 5.1.2 CSI reference signal received power (CSI-RSRP). f(l,i) is the closed-loop power control part, i.e., the adjustment amount of the UE's PUSCH transmit power. 10lg(2 u M PUSCH (i))+Δ TF (i) is other adjustment quantity, M PUSCH (i) is the number of RBs allocated for this uplink transmission. When the subcarrier spacing (SCS) is 15kHz, u = 0. If the SCS is doubled, the value of u also increases by 1, that is, the transmission power also doubles accordingly. Similarly, Δ TF (i) is the power offset value determined by different MCS levels, and the specific details are not repeated here.

[0086] (3) Narrowband Internet of Things (NB-IoT) narrowband physical random access channel (NPRACH) uplink power control

[0087] NPRACH refers to the preamble used to transmit the random access process. The transmission power of NPUSCH sent on the NB-IoT uplink slot i of the serving cell c is P NPUSCH,c (i) = min{P CMAX,c (i),P 0PUSCH,c (j)+α c (j)*PL c +10lg(M NPUSCH,c (i))}[dBm]. Where, P CMAX,c (i) is the maximum transmit power of the UE configured on the NB-IoT uplink slot i of the serving cell c; P 0PUSCH,c (j) is the expected receiving power of serving cell c; M NPUSCH,c The value of (i) is related to the bandwidth of the resource unit (RU) and the subcarrier spacing. If the subcarrier spacing is 3.75kHz, then M NPUSCH,c (i) = 1 / 4, if the subcarrier spacing is 15kHz, then M NPUSCH,c (i)∈{1,3,6,12};α c (j) is the path loss compensation factor, which is between 0 and 1; PL c is the estimated downlink path loss of the UE for the serving cell c, in decibels (dB). For details, see Section 16.2.1 of 3GPP TS 36.213.

[0088] (4) Sidelink power control

[0089] For the NR sidelink system, when Tx UE communicates with Rx UE, it is necessary to control the transmit power of Tx UE to reduce signal interference to the base station and other UEs. As shown in Figure 3, UE1 to UE3 all have RSRP measurement capabilities. Taking UE1 as Tx UE and UE2 as Rx UE as an example, the power control scheme of Tx UE is: P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))[dBm], where P CMAX ,P MAX,CBR Related to the UE's own transmission capability, The parameter description can refer to the relevant description of the power control parameters in (1) or (2) above, which will not be repeated here. PSSCH,SL (i) is the transmit power of UE during sidelink communication; min(P PSSCH,D (i),PPSSCH,SL (i)) is to prevent the UE from interfering with the base station and other UEs when sending sidelink signals, in order to obtain P PSSCH (i) The uplink and sidelink path losses need to be determined. The base station sends a synchronization signal to UE1. UE1 measures the synchronization signal to calculate the path loss between the base station and UE1. The path loss between UE1 and UE2 is also determined using the RSRP measurement results fed back by UE2. The RSRP measurement results are obtained by UE2 measuring the reference signal (RS).

[0090] In the passive IoT communication system under the UE-assisted architecture shown in Figure 4, the tag itself does not have measurement capabilities, and the link between the UE and the tag is a passive link. Since the tag itself cannot actively send RF signals, the UE needs to first transmit an excitation or carrier signal (carrying downlink data DL data). The tag modulates the carrier signal and reflects the modulated signal (carrying uplink data UL data) to the UE or base station to complete data transmission.

[0091] As can be seen, the tag relies on the carrier signal sent by the UE to send uplink data to the base station. However, the tag only includes absorption / reflection functions, and the receiver does not have any measurement capabilities such as RSRP. As a result, it is impossible to feedback RSRP or even RSSI to the network side like traditional UEs to achieve power control of UE transmitted signals. To this end, the embodiments of the present application provide a power control method that can implement UE power control in a passive IoT communication system under a UE-assisted architecture.

[0092] In the embodiment of the present application, the transmission power may also be referred to as the sending power, which is not limited to this.

[0093] For example, Figure 5 is a schematic diagram of the architecture of a power adjustment system provided in an embodiment of the present application. As shown in Figure 5, the power adjustment system includes: a first device, a second device, and a network device, and the network device, the first device, and the second device can communicate with each other.

[0094] In an embodiment of the present application, the first device may be a terminal device, which is a terminal that accesses the above-mentioned communication system and has a wireless transceiver function or a chip or chip system that can be set in the terminal. The terminal device may also be referred to as a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a vehicle-mounted terminal, an RSU with terminal function, etc. The terminal device of the present application can also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit that is built into the vehicle as one or more components or units. The vehicle can implement the method provided by the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0095] The second device has ultra-low power consumption, does not have baseband signal processing capabilities, but supports RF signal absorption and / or reflection capabilities. The second device can be called a terminal device in the Internet of Things, and can also be called a passive A-IoT, a passive tag, a tag, a tag device, a passive device, a passive device, a semi-active device, a battery-free terminal / device, a battery-free terminal / device, a back-reflection terminal / device, a backscatter terminal (back scatter terminal), a passive IoT, a reflector, a reflection terminal, or an ambient signal device, etc. In the embodiment of the present application, the device for realizing the function of the second device can be the second device, or it can be a device that can support the second device to realize the function, such as a chip system. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiment of the present application, the technical solution provided in the embodiment of the present application is described by taking the device for realizing the function of the second device as the second device as an example.

[0096] A network device may also be referred to as an access network (RAN) node, wireless access network device, access network device, RAN entity, or access node. It is located on the network side of the above-mentioned communication system and is used to help terminal devices achieve wireless access. It is a device with wireless transceiver capabilities or a chip or chip system that can be set in the device. The network device includes, but is not limited to: a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a Wi-Fi system. The network device may be a macro base station, a micro base station, an indoor station, a relay node, a donor node, or a wireless controller in a centralized radio access network (CRAN) scenario. Optionally, a RAN node may also be a server, a wearable device, a vehicle, or an onboard device. For example, the access network device in V2X technology may be a roadside unit (RSU). All or part of the functions of the network device in this application may also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform). The network device in this application may also be a logical node, logical module, or software that can implement all or part of the network device functions.

[0097] In another possible scenario, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0098] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0099] Further, for example, FIG6 is a schematic diagram of the architecture of a communication system applicable to the above-mentioned power control system provided in an embodiment of the present application. As shown in FIG6 , the communication system 6000 includes a radio access network 100 and a core network 200. Optionally, the communication system 6000 may also include the Internet 300. The radio access network 100 may include at least one base station (such as 110a and 110b in FIG6 ) and at least one terminal (such as 120a-120j in FIG6 ). The terminal is wirelessly connected to the base station, and the base station is wirelessly or wiredly connected to the core network. The core network equipment and the base station may be independent and distinct physical devices, or the functions of the core network equipment and the logical functions of the base station may be integrated into the same physical device, or a single physical device may integrate some of the functions of the core network equipment and some of the functions of the base station. Terminals and base stations may be interconnected via wired or wireless connections. FIG6 is merely a schematic diagram, and the communication system may also include other network devices, such as wireless relay equipment and wireless backhaul equipment, which are not shown in FIG6 .

[0100] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0101] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 6 can be configured as a mobile base station. For terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, for base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 6 can be referred to as communication devices with base station functionality, while 120a-120j in Figure 6 can be referred to as communication devices with terminal functionality.

[0102] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0103] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station function. The control subsystem that includes the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device that includes the terminal function.

[0104] It should be noted that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0105] The power control method provided in the embodiment of the present application will be described in detail below with reference to FIG7 .

[0106] For example, Figure 7 is a flowchart illustrating a power control method provided in an embodiment of the present application. This power control method can be applied to the system shown in Figure 5 or Figure 6. The power control method provided in an embodiment of the present application is described below, taking the first device as a terminal device and the second device as a tag as an example.

[0107] As shown in FIG7 , the power control method includes the following steps:

[0108] S701: A first device sends a first carrier signal to a second device. Correspondingly, the second device receives the first carrier signal from the first device.

[0109] In an embodiment of the present application, the first carrier signal carries / bears data information, and the first carrier signal can provide energy for the second device, so that the second device can parse and receive the information carried by the first carrier signal, and can modulate, encode, and process the received first carrier signal to obtain a first signal, and send uplink data through the first signal.

[0110] In one possible scenario, the first carrier signal is the first carrier signal sent by the first device to the second device. Because the second device cannot send the first signal to the network device before receiving the first carrier signal, initial communication has not yet taken place. Therefore, closed-loop communication has not yet been established between the network device, the first device, and the second device, and the communication is in an open-loop state. In this case, the transmission power of the first carrier signal can be achieved through the following two design solutions:

[0111] In one possible design scheme, the network device sends a reference signal to the first device, so that the first device receives the reference signal from the network device and determines the transmit power of the first carrier signal based on the receive power of the reference signal. That is, the first device can obtain the receive power of the reference signal (such as RSRP or RSSI) by measuring the reference signal sent by the network device, so that the first device can determine the path loss between the network device and the first device based on the receive power of the reference signal, and determine the transmit power of the first carrier signal based on the path loss between the network device and the first device. For example, the reference signal can be SSB, CSI-RS, demodulation reference signal (DMRS), phase tracking reference signal (PTRS), or positioning reference signal (PRS), etc.

[0112] For example, the transmission power P of the first carrier signal carrier1 (i) The following relationship can be satisfied: in, P CMAX is the maximum transmit power of the first device, is the received power of the first signal that the network device expects to obtain, μ1 is the subcarrier spacing sequence number of the first carrier signal, is the bandwidth of the first carrier signal, normalized to 1 RB. A partial path loss supplement factor used to calculate the transmit power of the first carrier signal, is the path loss between the network device and the first apparatus. In the embodiment of the present application, μ1, It can be pre-configured to the first device by the network device, or it can be determined by negotiation between the network device and the first device, which is not limited.

[0113] In another possible design, the transmit power of the first carrier signal may be configured by the network device for the first apparatus. In other words, the network device may indicate the transmit power of the first carrier signal to the first apparatus.

[0114] It should be understood that before the second device participates in the communication, the network device may also send an activation signal to the second device to put the second device into a working state.

[0115] In another possible scenario, the first carrier signal is not the first carrier signal sent by the first device, that is, the first device has already sent a carrier signal to the second device before sending the first carrier signal. At this time, since the second device can send a signal to the network device based on the carrier signal previously sent by the first device, that is, the network device and the second device have already communicated for the first time, a closed-loop communication has been formed between the network device, the first device, and the second device, and they are in an open-loop state. In this case, the process of determining the transmission power of the first carrier signal can refer to the process of determining the transmission power of the second carrier signal in S702 to S705 below, and will not be repeated here.

[0116] Thus, the first device can transmit the first carrier signal to the second device according to the determined transmission power of the first carrier signal.

[0117] S702: The second device sends a first signal to the network device. Correspondingly, the network device receives the first signal from the second device.

[0118] The first signal is associated with the first carrier signal. In other words, the generation of the first signal depends on the first carrier signal.

[0119] As described in S701 above, after receiving the first carrier signal, the second device can obtain the information carried by the first carrier signal by demodulating and decoding the received first carrier signal, and then re-modulate and encode the received first carrier signal to obtain the first signal. It is understood that the first signal can be considered to be the remodulated first carrier signal, and the first signal and the first carrier signal carry different data. In addition, because the power of the first carrier signal transmitted by the first device is lost during the transmission process, the power of the first carrier signal received by the second device is lower than the power when the first carrier signal was transmitted. At the same time, the received first carrier signal provides energy to the second device, so that the second device has sufficient energy to process the received first carrier signal.

[0120] In one possible design, the first signal and the first carrier signal are associated, and this may include: the first signal is determined by the second device reflecting the received first carrier signal. Reflection can be understood as modulating the received first carrier signal before transmitting it, such as performing simple amplitude modulation on the received first carrier signal, where the amplitude modulation may be OOK modulation, ASK modulation, etc., or reflection can be understood as basic electromagnetic wave reflection, without limitation.

[0121] S703: The network device measures the first signal to determine the received power of the first signal.

[0122] Exemplarily, the network device may perform power measurement on the received first signal to obtain the received power of the first signal.

[0123] S704: The network device sends the first information to the first apparatus. Correspondingly, the first apparatus receives the first information from the network device.

[0124] The first information is used to indicate the transmission power of the second carrier signal, and the first information is associated with the reception power of the first signal. In other words, the first information can be determined based on the reception power of the first signal.

[0125] In one possible design, the first information is used to indicate the transmit power of the second carrier signal, including: the first information is used to indicate at least one of a first path loss, a power adjustment amount, or a power value. Alternatively, the first information includes the receive power of the first signal, or at least one of the first path loss, a power adjustment amount, or a power value.

[0126] The first path loss may include the path loss between the first device and the second device, and the path loss between the second device and the network device. That is, the network device may determine the first path loss by comparing the power change between the transmit power of the first carrier signal and the receive power of the first signal. It should be understood that the first path loss may also include the loss incurred by the second device processing the received first carrier signal.

[0127] When the first information indicates the first path loss, the first information may include the received power of the first signal or the first path loss. If the first information includes the received power of the first signal, the first device may determine the first path loss based on the received power of the first signal and the transmit power of the first carrier signal. Thus, the first device may determine the power of the next transmitted carrier signal (the second carrier signal) based on the first path loss.

[0128] Exemplarily, the transmission power P of the second carrier signal carrier2 (i) The following relationship can be satisfied: or, in, is the received power of the second signal that the network device expects to obtain, μ2 is the subcarrier spacing sequence number of the second carrier signal, is the bandwidth of the second carrier signal, The partial path loss supplement factor used to calculate the transmit power of the second carrier signal, is the first path loss. In the embodiment of the present application, μ2, It can be pre-configured to the first device by the network device, or it can be determined by negotiation between the network device and the first device, which is not limited.

[0129] It should be understood that considering different communication scenarios or communication requirements, different carrier signal configurations μ n 、 There may be differences.

[0130] The power adjustment amount is used to characterize the power change required to adjust the transmit power of the first carrier signal to the transmit power of the second carrier signal. It can be a relative adjustment value of the transmit power, and the power adjustment amount can be a positive value or a negative value. In the case where the first information is used to indicate the power adjustment amount, the first device can determine the transmit power of the second carrier signal based on the power adjustment amount. Exemplarily, after receiving the first information, the first device can parse and obtain the power adjustment value, and increase or decrease the power based on the transmit power of the first carrier signal to obtain the transmit power of the second carrier signal. Exemplarily, P carrier2(i) = P carrier1 (i)+Δ, Δ is the power adjustment amount.

[0131] The power value is used to characterize the specific numerical value of the transmission power of the second carrier signal. In other words, after the network device determines the transmission power of the second carrier signal based on the received power of the first signal, it indicates the specific numerical value of the transmission power of the second carrier signal to the first device through the first information. The specific process of the network device determining the transmission power of the second carrier signal can be referred to the relevant description of the first device calculating the transmission power of the second carrier signal based on the first path loss, which will not be repeated here. In the case where the first information is used to indicate the power value, after the first device receives the first information, it can directly send the second carrier signal based on the transmission power of the second carrier signal obtained by analysis.

[0132] In one possible design scheme, the first information may also be associated with at least one of the following: the bandwidth of the first carrier signal, the bandwidth of the second carrier signal, the bandwidth of the first signal, or the bandwidth of the second signal, wherein the second signal is determined by the reflection of the received second carrier signal by the second device. The specific description can be found in the relevant description of the first signal in S701 and S702 above, and will not be repeated here.

[0133] In one possible design, the bandwidth of the first signal may be the same as the bandwidth of the first carrier signal. Given that the second device lacks any measurement capability, if the bandwidth of the first signal differs from the bandwidth of the first carrier signal, the network device may be unable to determine the first path loss based on the received power of the first signal after obtaining the received power of the first signal, thereby failing to implement power control for the first device.

[0134] S705: The first device sends the second carrier signal to the second device according to the transmission power of the second carrier signal.

[0135] In an embodiment of the present application, the first device adjusts the transmission power of the currently configured carrier signal (first carrier signal) based on the first information to obtain the power of the carrier signal (second carrier signal) to be sent next time, and thereby sends the second carrier signal to the second device based on the adjusted transmission power of the carrier signal.

[0136] Based on the power control method shown in Figure 7, the network device measures the received power of a first signal from a second device. The first signal is related to the carrier signal currently transmitted by the first device (such as the first carrier signal). Based on the received power of the first signal, first information indicating the power of the carrier signal (such as the second carrier signal) to be transmitted next by the first device can be determined, thereby enabling the first device to control the power of the carrier signal to be transmitted next time based on the first information. As a result, the network device, the first device, and the second device form a closed loop to control the power of the carrier signal transmitted by the first device, which can effectively reduce neighboring cell interference and improve communication reliability.

[0137] It can be understood that in each of the above embodiments, the methods and / or steps implemented by the first device can also be implemented by components that can be used for the first device (such as a processor, chip, chip system, circuit, logic module, or software); the methods and / or steps implemented by the second device can also be implemented by components that can be used for the second device (such as a processor, chip, chip system, circuit, logic module, or software); the methods and / or steps implemented by the network device can also be implemented by components that can be used for the network device (such as a processor, chip, chip system, circuit, logic module, or software).

[0138] The above mainly introduces the solution provided by this application. Accordingly, this application also provides a communication device, which is used to implement the various methods in the above method embodiments. The communication device can be the first device in the above method embodiments, or a device including the first device, or a component that can be used for the first device, such as a chip or a chip system. Alternatively, the communication device can be the second device in the above method embodiments, or a device including the second device, or a component that can be used for the second device, such as a chip or a chip system. Alternatively, the communication device can be the network device in the above method embodiments, or a device including the network device, or a component that can be used for the network device, such as a chip or a chip system.

[0139] It is understandable that, in order to realize the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0140] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0141] Taking the communication device as the first device or the second device or the network device in the above method embodiment as an example, Figure 8 is a structural diagram of a communication device provided in an embodiment of the present application. As shown in Figure 8, the communication device 800 includes: a processing module 801 and a transceiver module 802.

[0142] The processing module 801 is used to execute the processing function of the first device or the second device or the network device in the above method embodiment. The transceiver module 802 is used to execute the transceiver function of the first device or the second device or the network device in the above method embodiment.

[0143] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0144] Since the communication device 800 provided in this embodiment can execute the above-mentioned computing task scheduling method, the technical effects that can be obtained can refer to the above-mentioned method embodiments and will not be repeated here.

[0145] In one possible design solution, in the embodiment of the present application, the transceiver module 802 may include a receiving module and a sending module (not shown in FIG8 ).

[0146] In one possible design, the communication device 800 may further include a storage module (not shown in FIG8 ) storing a program or instruction. When the processing module 801 executes the program or instruction, the communication device 800 may perform the functions of the first device, the second device, or the network device in the method shown in FIG7 .

[0147] It should be understood that the processing module 801 involved in the communication device 800 can be implemented by a processor or a processor-related circuit component, which can be a processor or a processing unit; the transceiver module 802 can be implemented by a transceiver or a transceiver-related circuit component, which can be a transceiver or a transceiver unit.

[0148] For example, FIG9 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. The communication device may be a first device or a second device or a network device, or may be a chip (system) or other component or assembly that can be provided in the first device or the second device or the network device. As shown in FIG9 , a communication device 900 may include a processor 901. In one possible design scheme, the communication device 900 may further include a memory 902 and / or a transceiver 903. The processor 901 is coupled to the memory 902 and the transceiver 903, such as by being connected via a communication bus.

[0149] The following is a detailed introduction to the various components of the communication device 900 in conjunction with FIG9 :

[0150] The processor 901 is the control center of the communication device 900 and can be a single processor or a collective term for multiple processing elements. For example, the processor 901 can be one or more central processing units (CPUs), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0151] In one possible design, the processor 901 may execute various functions of the communication device 900 by running or executing software programs stored in the memory 902 and calling data stored in the memory 902 .

[0152] In a specific implementation, as an embodiment, the processor 901 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 9 .

[0153] In a specific implementation, as an embodiment, the communication device 900 may also include multiple processors, such as the processor 901 and the processor 904 shown in FIG9 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0154] The memory 902 is used to store the software program for executing the solution of the present application, and the execution is controlled by the processor 901. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0155] In one possible design, the memory 902 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 902 can be integrated with the processor 901 or exist independently and be coupled to the processor 901 through the interface circuit of the communication device 900 (not shown in FIG9 ), which is not specifically limited in this embodiment of the present application.

[0156] Transceiver 903 is used for communication with other communication devices. For example, if communication device 900 is a terminal device, transceiver 903 can be used to communicate with a network device or another terminal device. For another example, if communication device 900 is a network device, transceiver 903 can be used to communicate with a terminal device or another network device.

[0157] In one possible design solution, transceiver 903 may include a receiver and a transmitter (not separately shown in FIG9 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a sending function.

[0158] In one possible design scheme, the transceiver 903 can be integrated with the processor 901, or it can exist independently and be coupled to the processor 901 through the interface circuit of the communication device 900 (not shown in Figure 9). This embodiment of the present application does not specifically limit this.

[0159] It should be noted that the structure of the communication device 900 shown in FIG9 does not constitute a limitation on the communication device. An actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0160] In addition, the technical effects of the communication device 900 can refer to the technical effects of the computing task scheduling method described in the above method embodiment, and will not be repeated here.

[0161] An embodiment of the present application further provides a computer-readable storage medium on which a computer program or instruction is stored. When the computer program or instruction is executed by a computer, the functions of the above-mentioned method embodiment are realized.

[0162] The embodiments of the present application also provide a computer program product, which implements the functions of the above method embodiments when executed by a computer.

[0163] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0164] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0165] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0166] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0167] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0168] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0169] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0170] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0171] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A power control method, characterized in that: The method comprises: The first device sends a first carrier signal to the second device; The first device receives first information from a network device, the first information is used to indicate the transmission power of the second carrier signal, the first information is associated with the reception power of the first signal, and the first signal is associated with the first carrier signal; The first device sends a second carrier signal to the second device according to the transmission power of the second carrier signal.

2. A power control method, characterized in that: The method comprises: The second device receives the first carrier signal from the first device and sends a first signal to the network device, wherein the first signal is associated with the first carrier signal; The network device measures the first signal to determine a received power of the first signal, where the received power of the first signal is associated with first information, and the first information is used to indicate a transmitted power of a second carrier signal; The network device sends the first information to the first apparatus; The first device receives the first information from the network equipment, and sends the second carrier signal to the second device according to the transmission power of the second carrier signal.

3. The method according to claim 1 or 2, characterized in that: The first signal is associated with the first carrier signal, including: the first signal is determined by the second device reflecting the first carrier signal received.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: The first device receives a reference signal from the network device; The first device determines the transmit power of the first carrier signal according to the receive power of the reference signal; The first device sends the first carrier signal to the second device according to the transmission power of the first carrier signal.

5. A power control method, characterized in that: The method comprises: The network device receives a first signal from a second device; The network device measures the first signal to determine the received power of the first signal; The network device sends first information to the first apparatus, the first information is associated with the receiving power of the first signal, and the first information is used to indicate the sending power of the second carrier signal.

6. The method according to any one of claims 1 to 5, characterized in that The first information is used to indicate the transmission power of the second carrier signal, including: the first information is used to indicate at least one of a first path loss or a power adjustment amount or a power value.

7. The method according to claim 6, characterized in that The first path loss includes a path loss between the first device and the second device and a path loss between the second device and the network equipment.

8. The method according to any one of claims 1 to 7, characterized in that The bandwidth of the first signal is the same as the bandwidth of the first carrier signal.

9. A power control method, characterized in that: The method comprises: The second device receives the first carrier signal from the first device; The second device sends a first signal to the network device, and the first signal is associated with the first carrier signal.

10. The method according to claim 9, characterized in that The first signal is associated with the first carrier signal, including: the first signal is determined by the second device reflecting the first carrier signal received.

11. A communication device, characterized in that: The device comprises: a processing module and a transceiver module; wherein, The processing module is used to control the transceiver module to send a first carrier signal to the second device; The processing module is further used to control the transceiver module to receive first information from the network device, the first information is used to indicate the transmission power of the second carrier signal, the first information is associated with the reception power of the first signal, and the first signal is associated with the first carrier signal; The processing module is further used to control the transceiver module to send the second carrier signal to the second device according to the transmission power of the second carrier signal.

12. The device according to claim 11, characterized in that The first signal is associated with the first carrier signal, including: the first signal is determined by the second device reflecting the first carrier signal received.

13. The device according to claim 11 or 12, characterized in that The transceiver module is further used to receive a reference signal from the network device; The processing module is further configured to determine the transmit power of the first carrier signal according to the receive power of the reference signal; The transceiver module is further configured to send the first carrier signal to the second device according to the transmission power of the first carrier signal.

14. A communication device, characterized in that: The device comprises: a processing module and a transceiver module; wherein, The transceiver module is used to receive a first signal from a second device; The processing module is used to measure the first signal and determine the received power of the first signal; The transceiver module is further used to send first information to the first device, the first information is associated with the receiving power of the first signal, and the first information is used to indicate the sending power of the second carrier signal.

15. The device according to any one of claims 11 to 14, characterized in that The first information is used to indicate the transmission power of the second carrier signal, including: the first information is used to indicate at least one of a first path loss or a power adjustment amount or a power value.

16. The device according to claim 15, characterized in that The first path loss includes a path loss between the first device and the second device and a path loss between the second device and the network equipment.

17. The device according to any one of claims 11 to 16, characterized in that The bandwidth of the first signal is the same as the bandwidth of the first carrier signal.

18. A communication device, characterized in that: The device comprises: a processing module and a transceiver module; wherein, The processing module is used to control the transceiver module to receive a first carrier signal from a first device; The processing module is further used to control the transceiver module to send a first signal to the network device, where the first signal is associated with the first carrier signal.

19. The device according to claim 18, characterized in that The first signal is associated with the first carrier signal, including: the first signal is determined by the reflection of the first carrier signal received by the second device.

20. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute a computer program so that the communication device executes the method according to any one of claims 1, 3-4, and 6-8.

21. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute a computer program so that the communication device executes the method according to any one of claims 5 to 8.

22. A communication device, characterized in that: include: A processor, wherein the processor is configured to execute a computer program so that the communication device executes the method according to claim 9 or 10.

23. A communication system, characterized in that: It includes a first device for executing the method as described in any one of claims 1, 3-4, and 6-8, a network device for executing the method as described in any one of claims 5-8, and a second device for executing the method as described in claim 9 or 10.

24. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication device, the method according to any one of claims 1, 3-4, and 6-8 or claims 5-8 or claims 9 or 10 is implemented.

25. A computer program product, characterized in that The device comprises a computer program code, and when the computer program code is executed on a communication device, the communication device implements the method according to any one of claims 1, 3-4, and 6-8 or claims 5-8 or claims 9 or 10.

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