Power control method and device

Abstract

The invention provides a power control method and equipment, relates to the technical field of communication, and aims to enable terminal equipment to perform power control and reduce the power consumption of the terminal equipment. The method comprises: a terminal device determines a first path loss based on a reflection loss of a first device, determines a first sending power based on a first target power value and the first path loss, and sends first information to the first device at the first sending power. Wherein the first target power value is a detection threshold value or an activation threshold value of the first equipment. In one implementation, the first path loss may also be configured for the second device.

Description

Technical Field

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

[0002] In recent years, the Internet of Things (IoT) has garnered widespread attention in the wireless communications field. Information sent from terminal devices to access network equipment, from terminal devices to IoT devices, and from IoT devices to terminal devices all occupy the uplink spectrum of wireless communications systems.

[0003] Related technologies do not control the transmit power of a terminal device when sending information to an IoT device. The transmit power of a terminal device can be high, resulting in high power consumption and potentially interfering with other devices in the communication system. Summary of the Invention

[0004] The embodiments of the present application provide a power control method and device, which can control the power of a terminal device and reduce the power consumption of the terminal device. In addition, it can also reduce interference with other devices in the communication system.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the present application provides a power control method, applied to a third device, which may include: determining a first transmit power based on a first target power value and a first path loss, the first target power value being a detection threshold value or an activation threshold value of the first device; the first path loss being determined based on the reflection loss of the first device, or the first path loss being configured for the second device; and sending first information to the first device at the first transmit power.

[0007] That is to say, the third device (taking the terminal device as an example) can determine the first transmission power for sending the first information to the first device based on the reflection loss of the first device (such as an IoT device that does not have the ability to generate signals independently) and the first target power value of the first device, or the third device can determine the first transmission power for sending the first information to the first device based on the path loss configured by the second device (network device).

[0008] In this way, the present application adopts a method different from the prior art to calculate the first path loss, and the calculation of the first path loss is more flexible. In addition, the third device can determine the first transmission power based on the reflection loss of the first device and the first target power value, thereby determining the first transmission power of the third device. The third device sends the first information to the first device at the first transmission power. The power value of the first information when it reaches the IoT device is maintained at a level that the first device can receive and does not exceed the first target power value of the first device (or the power value of the information when it reaches the IoT device exceeds the first target power value of the IoT device and is maintained within a smaller range). The terminal device does not need to always send the first information at the maximum transmission power, which reduces the power consumption of the third device when sending the first information to the first device, and can achieve control of the transmission power.

[0009] In one possible implementation, if the first device is a plurality of first devices, determining the first transmit power based on the first target power value and the first path loss includes: determining the first transmit power based on the first target power value and a maximum value of the first path loss of at least one first device, wherein the first path loss is determined based on the reflection loss of the first device.

[0010] When there are multiple first devices, determining the first transmit power based on the maximum value of the first target power value and the first path loss of at least one first device can ensure that the multiple first devices can receive the first information sent by the third device.

[0011] In a possible implementation, the first path loss is further determined based on the transmission power of the carrier sent to the first device and the reception strength of the second information, where the second information is information reflected by the carrier or information transmitted by the carrier for reflection.

[0012] In this way, the third device does not need the reference signal of the first device, and can also obtain the first path loss of the first device, thereby obtaining the first transmit power, thereby achieving control of the transmit power of the third device.

[0013] In a possible implementation, the carrier comes from the third device or the fourth device.

[0014] Optionally, the carrier required by the first device may come from the third device or the fourth device, and this embodiment of the present application does not impose any specific limitation on this.

[0015] In a possible implementation manner, the carrier is a carrier used for reflection transmission.

[0016] In a possible implementation, the first path loss is further determined based on a power amplifier adjustment value of the first device and / or an offset of frequency conversion.

[0017] In a possible implementation, the first path loss is further determined based on a power amplifier adjustment value of the first device.

[0018] In this way, for the first device capable of power amplification, the first path loss is also determined based on the power amplifier adjustment value of the first device, thereby improving the calculation accuracy of the first path loss and achieving high-precision power control of the third device.

[0019] In a possible implementation, the first path loss is further determined based on an offset of the frequency conversion.

[0020] The frequency conversion offset is the transmission power loss generated by the first device when performing frequency conversion. The frequency conversion offset can also be understood as the power offset corresponding to the frequency conversion performed by the first device.

[0021] That is, the first path loss can be determined based on the transmission power of the carrier sent by the terminal device to the first device, the reflection loss of the first device, the reception strength of the second information, and the offset of the frequency conversion.

[0022] Among them, the frequency band of the carrier sent by the terminal device may be different from the frequency band of the carrier containing the control information / data information sent to the IoT device. The frequency band of the carrier sent by the terminal device is different from the frequency band of the information reflected by the IoT device (such as the second information). The frequency conversion between different frequency bands may cause power offset.

[0023] In one possible implementation, the first path loss can be determined based on the transmit power of a carrier sent by the terminal device to the first device, the return loss of the first device, the reception strength of the second information, the power adjustment value of the first device, and the offset of the frequency conversion. In this way, a more accurate first path loss can be obtained.

[0024] In a possible implementation, the first path loss is related to a maximum coverage range of the third device.

[0025] When the first device is a plurality of first devices, the first path loss may be configured for the second device, and the first path loss is related to the maximum coverage range of the third device.

[0026] Exemplarily, the second device may estimate the maximum coverage range of the terminal device (third device) and determine the maximum equivalent path loss of the terminal device based on the maximum coverage range. Optionally, the maximum equivalent path loss of the terminal device may be represented as the first path loss of the terminal device. The maximum coverage range of the terminal device may be a circular range with the terminal device as the center and the distance to the farthest first device as the radius.

[0027] In a possible implementation manner, the reflection loss is related to the type of the first device.

[0028] In this way, the third device can determine the return loss of the first device based on the type of the first device, thereby obtaining the first path loss of the first device. Classifying the first devices and determining the return loss of the first devices eliminates the need to individually determine the return loss of each first device, thereby improving work efficiency.

[0029] In a possible implementation manner, the reflection loss is predefined; or, the reflection loss is configured by the second device; or, the reflection loss is reported by the first device.

[0030] The reflection loss is reported by the first device, that is, the first device sends the reflection loss to the third device.

[0031] In a possible implementation manner, the first target power value is predefined; or, the first target power value is configured by the second device.

[0032] In a possible implementation manner, the first information is at least one of control information, data information, or a carrier.

[0033] Illustratively, the first information may be select signaling, query signaling, ACK signaling, access signaling, queryrep signaling, carrier, etc.

[0034] In one possible implementation, the first information is control information or data information, and the first target power value is a detection threshold value or an activation threshold value of the first device, including: the first target power value is a detection threshold value or an activation threshold value of the first device for detecting control information or data information.

[0035] Optionally, when the information strength of the control information and / or data information received by the first device is higher than the detection threshold value, the first device considers that the control information and / or data information exists; when the information strength of the control information and / or data information received by the first device is lower than the detection threshold value, the first device considers that the control information and / or data information does not exist. Alternatively, when the information strength of the control information and / or data information received by the first device is higher than the activation threshold value, the first device considers that the control information and / or data information exists; when the information strength of the control information and / or data information received by the first device is lower than the activation threshold value, the first device considers that the control information and / or data information does not exist. Exemplarily, the control information and / or data information includes the following: Figure 5 The select signaling, query signaling, ACK signaling, access signaling, query rep signaling, etc. are shown.

[0036] In a possible implementation, the first information is a carrier, and the first target power value is a detection threshold value or an activation threshold value of the first device, including: the first target power value is a detection threshold value or an activation threshold value for the first device to detect the carrier.

[0037] Optionally, when the carrier strength received by the first device is higher than the detection threshold, the first device considers that the carrier exists; when the carrier strength received by the first device is lower than the detection threshold, the first device considers that the carrier does not exist. Alternatively, when the carrier strength received by the first device is higher than the activation threshold, the first device considers that the carrier can be activated and used to carry the information of the first device; when the carrier strength received by the first device is lower than the activation threshold, the first device considers that the carrier is in an inactive state. For example, the carrier can be as follows Figure 5 The terminal device shown sends carrier 1 to carrier n to the IoT device.

[0038] In one possible implementation, the method includes: determining a second transmit power based on a second target power value and a second path loss, the second target power value being a target receive power of the second device, and the second path loss being determined based on a reference signal receive power; and sending third information to the second device at the second transmit power.

[0039] The third device uses different transmission powers to send information to different devices, thereby achieving precise transmission power control and reducing power consumption.

[0040] In a possible implementation, the first information occupies the first sub-resource, the third information occupies the second sub-resource, and both the first sub-resource and the second sub-resource belong to the first frequency domain resource.

[0041] The third device occupies the first sub-resource and uses the first transmission power to send the first information to the first device, and occupies the second sub-resource and uses the second transmission power to send the third information to the second device.

[0042] In this way, the third device uses different transmission powers for information transmission on different links occupying the first frequency domain resources. That is, the terminal device occupies different sub-resources and uses different transmission powers to send information, which can reduce co-channel and adjacent channel interference.

[0043] In a possible implementation, the type of the first device is different from the type of the second device; or the link for sending the first information to the first device is different from the link for sending the third information to the second device.

[0044] In the second aspect, the present application provides a power control method, which is applied to a third device. The method may include: using a first power control method on a first sub-resource to send first information to the first device at a first transmission power; using a second power control method on a second sub-resource to send third information to the second device at a second transmission power; the first power control method is different from the second power control method; the first sub-resource and the second sub-resource both belong to the first frequency domain resources.

[0045] In a possible implementation, the type of the first device is different from the type of the second device; or the link for sending the first information to the first device is different from the link for sending the third information to the second device.

[0046] In one possible implementation, the method further includes: determining a first transmission power based on a first path loss, the first path loss being determined based on the transmission power of a carrier sent to the first device, the reception strength of second information, and the reflection loss of the first device, wherein the second information is information reflected by the carrier and transmitted on the carrier for reflection.

[0047] In a possible implementation, the carrier comes from the third device or the fourth device.

[0048] In one possible implementation, the first path loss is determined based on the transmission power of the carrier sent to the first device, the reception intensity of the second information, and the reflection loss of the first device, including: the first path loss is determined based on the transmission power of the carrier sent to the first device, the reception intensity of the second information, the reflection loss of the first device, and the power amplifier adjustment value and / or frequency conversion offset of the first device.

[0049] In one possible implementation, the first path loss is determined based on the transmission power of the carrier sent to the first device, the reception intensity of the second information, and the reflection loss of the first device, including: the first path loss is determined based on the transmission power of the carrier sent to the first device, the reception intensity of the second information, the reflection loss of the first device, and the power amplifier adjustment value of the first device.

[0050] In a possible implementation, the first path loss is further determined based on the transmission power of the carrier sent to the first device, the reception strength of the second information, the reflection loss of the first device, and the offset of the frequency conversion.

[0051] The frequency conversion offset is the transmission power loss generated by the first device when performing frequency conversion. The frequency conversion offset can also be understood as the power offset corresponding to the frequency conversion performed by the first device.

[0052] In a possible implementation, the first path loss is further determined based on the transmission power of the carrier sent to the first device, the reception strength of the second information, the reflection loss of the first device, the power amplifier adjustment value of the first device, and the offset of the frequency conversion.

[0053] In a possible implementation, the first device is a plurality of first devices, and the method further includes: determining the first transmit power according to a first path loss, the first path loss originating from the second device, and the first path loss being related to a maximum coverage range of a third device;

[0054] In a possible implementation, the first device is a plurality of first devices, and the method further includes: determining the first transmit power according to a first path loss, the first path loss comes from the second device, and the first transmit power is determined according to a maximum value of the first path losses of the plurality of first devices.

[0055] In a possible implementation, the first transmit power is determined according to the first path loss, including: the first transmit power is determined according to the first path loss and a first target power value, where the first target power value is a detection threshold value or an activation threshold value for the first device to detect the first information.

[0056] In a possible implementation manner, the reflection loss of the first device is predefined by the first device; or, the reflection loss of the first device is configured by the second device.

[0057] In one possible implementation, the method includes: receiving second information from a first device; the second information is information reflected based on a carrier; the second signal is used to indicate at least one of the reflection loss of the first device, the power amplification capability of the first device, and the power amplification adjustment value of the first device.

[0058] In a possible implementation manner, the first information includes at least one of control information, data information, or a carrier.

[0059] In a possible implementation, the first device is an Internet of Things device, and the second device is a network device.

[0060] In a possible implementation, the carrier comes from the third device or the fourth device.

[0061] In a possible implementation manner, the carrier is a bearer carrier used for reflection transmission.

[0062] In a third aspect, the present application provides a power control method, which is applied to a third device. The method may include: the third device determines a first target power value, where the first target power value is a detection threshold value or an activation threshold value of the first device; the third device determines a first path loss, where the first path loss is determined based on the transmission power of the carrier sent to the first device, the receiving strength of the second information, and the reflection loss of the first device, and the second information is information reflected by the carrier or information transmitted by the carrier for reflection, and the carrier signal comes from the third device or the fourth device; the third device determines a first transmission power on the first sub-resource based on the first target power value and the first path loss, and the first transmission power is used to send the first information to the first device.

[0063] In a possible implementation manner, the carrier is a carrier used for reflection transmission.

[0064] In a possible implementation, the first target power value is an offset relative to the second target power value; the second target power value is a target receiving power of the second device.

[0065] In one possible implementation, the third device sends third information to the second device at a second transmit power on the second sub-resource; the second transmit power is determined according to a second target power value and a second path loss; and the second path loss is determined based on a reference signal received power.

[0066] In a possible implementation manner, the first sub-resource and the second sub-resource belong to the first frequency domain resource.

[0067] In one possible implementation, the first device is a plurality of first devices, and based on a first target power value and a first path loss, determines a first transmit power on a first sub-resource, including: determining the first transmit power on the first sub-resource based on a maximum value of the first target power value and a first path loss of at least one first device.

[0068] In a possible implementation, the first path loss is further determined based on a power amplifier adjustment value of the first device.

[0069] In a possible implementation, the first path loss is further determined based on an offset of the frequency conversion.

[0070] The frequency conversion offset is the transmission power loss generated by the first device when performing frequency conversion. The frequency conversion offset can also be understood as the power offset corresponding to the frequency conversion performed by the first device.

[0071] In one possible implementation, the first path loss can be determined based on the transmit power of a carrier sent by the terminal device to the first device, the return loss of the first device, the reception strength of the second information, the power adjustment value of the first device, and the offset of the frequency conversion. In this way, a more accurate first path loss can be obtained.

[0072] In a possible implementation, the first path loss is related to a maximum coverage range of the third device.

[0073] In a possible implementation manner, the reflection loss is related to the type of the first device.

[0074] In a possible implementation manner, the reflection loss is predefined; or, the reflection loss is configured by the second device; or, the reflection loss is reported by the first device.

[0075] In a possible implementation manner, the first target power value is predefined; or, the first target power value is configured by the second device.

[0076] In a possible implementation manner, the first information is at least one of control information, data information, or a carrier.

[0077] In one possible implementation, the first information is control information or data information, and the first target power value is a detection threshold value or an activation threshold value of the first device, including: the first target power value is a detection threshold value or an activation threshold value of the first device for detecting control information or data information.

[0078] In a possible implementation, the first information is a carrier, and the first target power value is a detection threshold value or an activation threshold value of the first device, including: the first target power value is a detection threshold value or an activation threshold value for the first device to detect the carrier.

[0079] In a possible implementation, the type of the first device is different from the type of the second device; or the link for sending the first information to the first device is different from the link for sending the second information to the second device.

[0080] In a fourth aspect, the present application provides a power control method, applied to a third device, which may include: determining a first transmission power based on a first target power value and a first path loss, the first target power value being a detection threshold value or an activation threshold value of the first device; the first path loss is determined based on a receiving strength of second information, the second information being information reflected based on the carrier, or the first path loss is configured for the second device; and sending the first information to the first device at the first transmission power.

[0081] In a fifth aspect, an embodiment of the present application provides a power control device having the function of implementing any of the methods described in the first aspect above. This function can be implemented by hardware or by hardware executing corresponding software. The device can be a third device (e.g., a terminal device) or a component in a third device (e.g., a chip or chip system).

[0082] In one possible implementation, the hardware or software includes one or more modules corresponding to the above functions, such as a processing module and a transceiver module. The processing module may be a processor, and the transceiver module may be a transceiver. When the apparatus is a third device (such as a terminal device), the transceiver may be a radio frequency module. When the apparatus is a component in a third device (such as a chip or a chip system), the transceiver may be an input / output interface, a pin, or a circuit.

[0083] In a sixth aspect, a power control apparatus is provided, comprising: a processor configured to execute any power control method according to the first aspect. The apparatus may be a third device (e.g., a terminal device) or a component (e.g., a chip or chip system) in the third device.

[0084] In one possible implementation, the device may also include: a memory; the memory is used to store computer-executable instructions, and when the power control device is running, the processor executes the computer-executable instructions stored in the memory to enable the power control device to perform a power control method as described in any one of the first aspects above.

[0085] In a possible implementation, the processor is coupled to a memory, and after reading instructions from the memory, executes the power control method according to any one of the instructions in the first aspect. The memory may be located outside the device.

[0086] In a seventh aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium. When the computer-readable storage medium is run on a computer, the computer can execute the power control method of any one of the above aspects.

[0087] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any one of the power control methods in any one of the above aspects.

[0088] In a ninth aspect, a circuit system is provided, the circuit system including a processing circuit, the processing circuit being configured to execute a power control method as described in any one of the above aspects.

[0089] In a tenth aspect, a power control system is provided, which includes the first device in any one of the first aspects, the second device in any one of the first aspects, and the third device in any one of the first aspects.

[0090] The technical effects corresponding to the second to tenth aspects and any one of the implementation methods of the second to tenth aspects can be referred to the technical effects corresponding to the above-mentioned first aspect and any one of the implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 A schematic diagram of a topological structure of a first device provided in an embodiment of the present application;

[0092] Figure 2 A schematic diagram of a scenario of inter-device communication provided in an embodiment of the present application;

[0093] Figure 3 A system diagram of a power control method provided in an embodiment of the present application;

[0094] Figure 4 A schematic diagram of a link of a power control method provided in an embodiment of the present application;

[0095] Figure 5 A schematic diagram of information interaction provided in an embodiment of the present application;

[0096] Figure 6 A schematic diagram of a power control method according to an embodiment of the present invention;

[0097] Figure 7 Another information interaction diagram provided in an embodiment of the present application;

[0098] Figure 8 A schematic diagram of information transmission of a power control method provided in an embodiment of the present application;

[0099] Figure 9 A schematic diagram of the structure of a power control device provided in an embodiment of the present application;

[0100] Figure 10 A schematic structural diagram of another power control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0101] The terms "first" and "second" in the description and drawings of this application are used to distinguish different objects, or to distinguish different treatments of the same object, rather than to describe a specific order of objects. In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices. In the embodiments of the present application, "multiple" includes two or more. In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete way.

[0102] In this application, the expression " / " is used to indicate that the objects associated with each other are in an "or" relationship; for example, A / B can mean: A or B. The expression "and / or" is used to indicate that the objects associated with each other can be in an and relationship or an or relationship; for example, A and / or B can mean the following situations: A exists alone, B exists alone, and A and B exist at the same time, where A and B can be single or multiple. "At least one of the following" or similar expressions is used to indicate any combination of the listed items; for example, at least one of A, B and / or C can mean the following situations: A exists alone, B exists alone, C exists alone, A and B exist at the same time, B and C exist at the same time, A and C exist at the same time, and A, B and C exist at the same time, where A, B, and C can be single or multiple.

[0103] First, the technical terms, application scenarios, etc. involved in this application are introduced.

[0104] An ambient IoT (A-IoT) device (IoT device for short) is an intelligent device with communication and perception capabilities that can exchange data, perform remote control, and transmit information with network devices or terminal devices. In this application, the first device can be an A-IoT device or a component in an A-IoT device (such as a chip or chip system). All descriptions of A-IoT devices apply to the first device.

[0105] Among them, IoT devices can be applied to Figure 1 Four topologies are shown.

[0106] In topology 1, a base station (BS) and IoT devices can communicate directly and bidirectionally. The base station and IoT devices can exchange data and / or signaling (signaling can also be expressed as information).

[0107] In topology 2, IoT devices can communicate bidirectionally with the base station through an intermediate node. In this topology, the intermediate node can be a relay device that enables communication between the IoT device and the base station, an integrated access and backhaul (IAB) node, a user equipment (UE), a repeater, etc. The base station communicates with the intermediate node via the Uu interface. In the embodiments of this application, the intermediate node can be used as an example to introduce the UE.

[0108] In topology 3, bidirectional communication is possible between IoT devices and UEs. The UE and IoT devices can exchange data and / or signaling information.

[0109] In topology 4, the IoT device sends data / signaling to the base station and receives data / signaling from the assisting node; or the IoT device receives data / signaling from the base station and sends data / signaling to the assisting node.

[0110] IoT devices can be divided into three categories based on their capabilities:

[0111] IoT device A: This device may or may not store energy and lacks independent signal generation or amplification during backscattering transmission. This device is also known as a passive IoT device.

[0112] IoT device B: This device can store energy and does not generate independent signals during reflection transmission. However, it can amplify the reflected signal. This is also known as a semi-passive IoT device. Specifically, it can amplify the reflected signal using the stored energy.

[0113] IoT device C: Capable of energy storage and independent signal generation, it has an active radio frequency (RF) for data transmission and is also called an active IoT device.

[0114] The information sent by IoT devices needs to be detected by a reader. Typically, the reader is the receiver. As mentioned above, IoT devices A and B rely on a carrier wave provided by an excitation source to send information to the receiver. Devices A and B do not have the ability to independently generate signals, meaning they cannot generate a carrier wave. They require a source that can provide a carrier wave to provide the IoT device with a carrier wave. The carrier wave provided by this source does not carry any information and is used to carry the information to be sent from the IoT device. The IoT device then transmits the information to be sent on this carrier wave, a process known as backscattering transmission.

[0115] The node that provides the carrier to the IoT device can be called the activator. In the embodiment of the present application, excitation, activation, trigger, and carrier can be interchangeable. The excitation source, activation source, trigger source, and carrier source can all be understood as the same source. These sources provide a carrier for reflection transmission. Among them, the carrier can also be replaced by a waveform or a bearer carrier, that is, a carrier for reflection transmission of the IoT device. Optionally, the excitation source that transmits (sends) the carrier can be located in the topology where the IoT device is located, or not in the topology where the IoT device is located. The excitation source can be integrated with the receiver or not integrated with the receiver. When the excitation source and the receiver are not integrated, the excitation source and the receiver may not be the same node, that is, the excitation source comes from other nodes.

[0116] For example, in topologies 1-4 above, topologies 1-3 are co-located with the excitation source and receiver; topology 4 is non-co-located with the excitation source and receiver. When the excitation source is not located in the topology where the IoT device resides, the excitation source can be relatively close to the IoT device, or relatively far away from the IoT device. Links in each topology are either bidirectional or unidirectional. Each topology can contain more than one base station, UE, auxiliary node, or intermediate node.

[0117] In the related art, in the communication process between the IoT device and the UE in topology structures 2-4, the signal cannot be generated independently. The IoT device cannot send reference information to the UE, and the UE cannot determine the path loss between the UE and the IoT device based on the reference signal, thereby being unable to determine the UE's transmission power and unable to perform power control on the UE. In order to ensure that the power of the signal sent by the UE is maintained at a level that the IoT device can receive when it reaches the IoT device, the UE's transmission power is often high. For example, the transmission power of the UE's maximum coverage range (or the maximum transmission power supported by the UE) is used to send a signal to the IoT device, resulting in more power consumption of the UE. Among them, the transmission power of the UE's maximum coverage range can be understood as a circular range with the UE as the center and the distance from the IoT device farthest from the UE as the radius.

[0118] For example, take topology 2 as an example. Figure 2 As shown, in scenario 1, UE1 and UE2 are both auxiliary UEs (for example, intermediate nodes in the above-mentioned topology 2). UE1 serves IoT device 1 and IoT device 2, that is, UE1 and IoT device 1 and IoT device 2 belong to the same topology, and UE1 communicates with IoT device 1 and IoT device 2. UE2 serves IoT device 3, that is, UE2 can belong to the same topology as IoT device 3, and UE2 communicates with IoT device 3. The maximum transmission power coverage of UE2 can cover IoT device 3. The maximum transmission power coverage of UE1 can cover IoT device 2 (IoT device 2 is the farthest from UE1, and at this time, UE1's transmission power can also cover IoT device 1 and IoT device 3). When UE1 sends information to IoT device 1, if power control is not performed on UE1, UE1 may use the transmission power of the maximum coverage range to send information to IoT device 1, which may cause interference to IoT device 3.

[0119] In Scenario 2, base station 1, UE1, IoT device 1, and IoT device 2 belong to the same topology. UE1 is an intermediate node, allowing communication between UE1 and IoT device 1 and 2. Base station 2, transmit receive point (TRP) 1, and IoT device 3 also belong to the same topology. TRP 1 is an intermediate node, allowing communication between TRP 1 and IoT device 3. UE1's maximum transmit power covers IoT device 2 (IoT device 2 is farthest from UE1, so UE1's transmit power can also cover IoT device 1 and TRP 1). Information transmission between UE1 and IoT device 1 is considered uplink transmission, and information transmission between UE1 and TRP 1 is also considered uplink transmission. When UE1 sends information to IoT device 1, if power control is not performed on UE1, UE1 may use the maximum transmit power within its coverage range to send information to IoT device 1. At this time, if TRP 1 is in a receiving state, it may be subject to interference.

[0120] In Scenario 3, base station 1, UE1, IoT device 1, and IoT device 2 belong to the same topology. UE1 is an intermediate node, allowing UE1 to communicate with IoT device 1 and IoT device 2. Base station 2 and other devices do not have a topology. UE1's maximum transmit power coverage can cover IoT device 2 (IoT device 2 is farthest from UE1, so UE1's transmit power can also cover IoT device 1 and base station 2). Information sent between UE1 and IoT device 1 is considered uplink transmission, and information sent between UE1 and base station 2 is also considered uplink transmission. When UE1 sends information to IoT device 1, if power control is not performed on UE1, UE1 may use the transmit power within the maximum coverage range to send information to IoT device 1, which may cause interference to base station 2.

[0121] Based on the above problems, the embodiment of the present application provides a power control method, which can be applied to Figure 1 Power control of the UE when communicating with the IoT device in topology 2-4 shown.

[0122] In topologies 2-4, the IoT device does not independently generate signals and therefore cannot send reference signals to the UE. Using existing technologies, the UE cannot determine path loss based on the IoT device's reference signal and cannot obtain the UE's transmit power. In this embodiment of the present application, the UE can use a first power control method to send first information to the IoT device at a first transmit power.

[0123] The first power control method does not require obtaining a reference signal from the IoT device. Instead, it determines a first path loss through the reflection loss of the IoT device, thereby determining the first transmit power of the UE based on the first path loss and the first target power value. The UE sends information to the IoT device at the first transmit power. The power value of the information when it reaches the IoT device remains at a level that the IoT device can receive and does not exceed the first target power value of the IoT device (or the portion of the power value of the information when it reaches the IoT device that exceeds the first target power value of the IoT device remains within a small range). This reduces the power consumption of the UE when sending the first information to the IoT device, thereby achieving control of the transmit power.

[0124] A second power control mode is used to send third information to the second device at a second transmit power, wherein the second transmit power is determined based on a second target power value and a second path loss, the second target power value being a target receive power of the second device, and the second path loss being determined based on a reference signal receive power.

[0125] The embodiment of the present application takes the power control of the UE when communicating with the IoT device in topology 2 as an example to introduce.

[0126] In this application, the second device can be a network device or a component in the network device (such as a chip or a chip system), and the descriptions related to the network device are applicable to the second device; the third device can be a terminal device or a component in the terminal device (such as a chip or a chip system), and the descriptions related to the terminal device are applicable to the third device.

[0127] like Figure 3 FIG2 is a schematic diagram of a power control system. The system includes at least a network device 10 (an example of a second device), a terminal device 20 (an example of an intermediate node), and an IoT device 30 (an example of a first device). The terminal device 20 can communicate with the IoT device 30, and the terminal device 20 can also communicate with the network device 10.

[0128] The network device 10 is a device deployed in a wireless access network to provide wireless communication functions. Optionally, the network device 10 may refer to a device that communicates with the wireless terminal device 20 via one or more cells on the air interface of the access network. The device that implements the function of the network device 10 may be the network device 10, or may be a device that supports the network device 10 in implementing the function (such as a chip or chip system in the network device 10). Optionally, the network device 10 may manage the attributes of the air interface. The base station device may also coordinate the attribute management of the air interface. The network device 10 may be various forms of macro base stations, micro base stations (also known as small base stations), relay devices of relay stations, base stations, evolved NodeBs (eNodeBs), transmission reception points (TRPs), next-generation NodeBs (gNBs) in fifth-generation (5G) mobile communication systems, next-generation base stations in sixth-generation (6G) mobile communication systems, base stations in future mobile communication systems, access nodes in WiFi systems, or open RAN (O-RAN), etc. Alternatively, in a distributed base station scenario, the network device may be a baseband unit (BBU) or a remote radio unit (RRU); in a cloud radio access network (CRAN) scenario, the network device 10 may be a baseband pool (BBU pool) or an RRU.

[0129] A terminal device is a device with wireless transceiver capabilities that can send signals to or receive signals from a base station; it can send signals to or receive information from an IoT device. A terminal device may also be referred to as a terminal, user equipment (UE), mobile station, or mobile terminal. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, and smart cities. A terminal device can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, aircraft, ship, robot, robotic arm, smart home appliance, or the like. For another example, the terminal device 20 can be a component in any of the above devices (e.g., the terminal device 20 can refer to a chip or chip system in any of the above devices). The embodiments of this application do not limit the specific technology or device form factor used by the terminal device.

[0130] If IoT device 30 does not have independent signal generation capabilities, it requires a device capable of providing a carrier wave, such as terminal device 20. The carrier wave provided by terminal device 20 is used to carry information to be transmitted from the IoT device, so that the IoT device transmits the information carried in the carrier wave to terminal device 20. Optionally, IoT device 30 is a passive or semi-passive IoT device. IoT device 30 can be widely used in various scenarios, such as logistics management, access control systems, and intelligent transportation.

[0131] For another example, the device that provides the carrier for the IoT device 30 may also be a device other than the terminal device 20, which is hereinafter referred to as the fourth device ( Figure 3 (not shown). When the fourth device is used to provide a carrier for the first device, it is an excitation source for the first device. Optionally, the fourth device can be a terminal device, a network device, or other device that can provide a carrier. This application does not limit the specific type of the fourth device.

[0132] Figure 3The power control system schematic diagram shown can be applied to the current long term evolution (LTE) or advanced long term evolution (LTE-A) system, and can also be applied to the 5G network currently being developed or other future networks. Of course, it can also be applied to LTE and 5G hybrid networking systems, or other systems. The embodiments of the present application do not specifically limit this. Among them, in different networks, the network device 10, terminal device 20, and IoT device 30 in the above power control system may correspond to different names. It can be understood by those skilled in the art that the name does not constitute a limitation on the device itself.

[0133] The power control system and service scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Persons skilled in the art will appreciate that, with the evolution of network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0134] In one implementation, Figure 4 As shown, in topology 2, the network device 10 and the terminal device 20 communicate through the air interface (Uu), the transmission link between the network device 10 and the terminal device 20 is link1, and the transmission link between the terminal device 20 and the IoT device 30 is link2.

[0135] The link through which the terminal device 20 sends information to the network device 10 is link 1.1. The link through which the terminal device 20 sends information to the IoT device 30 is link 2.1. The link through which the IoT device 30 sends information to the terminal device 20 is link 2.1.

[0136] From the spectrum perspective, both link 1.1 and link 2.1 involve the terminal device 20 transmitting information in the uplink spectrum, but with different target nodes.

[0137] Optionally, the embodiment of the present application is introduced by taking the example that the terminal device 20 sends a carrier to the IoT device 30, and the IoT device 30 carries information on the carrier and sends it to the terminal device 20.

[0138] In one implementation, a terminal device transmits a carrier wave to an IoT device. As a possible implementation, the terminal device can periodically transmit the carrier wave to the IoT device. After receiving the carrier wave from the terminal device, the IoT device transmits the information to be transmitted to the terminal device, carrying it on the carrier wave. It should be understood that the aforementioned periodicity of the carrier wave transmission by the terminal device is merely an example and is not specifically limited in this embodiment of the present application.

[0139] Optionally, the frequency band of the carrier transmitted by the terminal device may be different from the frequency band of the carrier on which the control information / data information sent to the IoT device belongs. That is, the carrier on which the terminal device transmits the carrier to the IoT device may be a separate or independent carrier from the carrier on which the control information / data information sent to the IoT device belongs, i.e., a frequency division duplex (FDD) carrier. In this case, when performing power control, it is necessary to further consider the transmission power offset caused by frequency changes or frequency relocations in different frequency bands.

[0140] In another implementation, the terminal device may also send a carrier wave to the IoT device non-periodically, and the embodiment of the present application does not impose any specific restrictions on this.

[0141] In one implementation, the network device can send an operation instruction to the terminal device to instruct the terminal device to communicate with the IoT device. Alternatively, the terminal can communicate with the IoT device on its own without the need for instructions from the network device.

[0142] Optionally, the interactive process of communication between the terminal device and the IoT device can be shown as 5.

[0143] Exemplarily, the terminal device may generate an IoT device request message based on an operation instruction sent by the network device, such as a select signaling, which carries indication information for indicating the identification ID of the IoT device. Optionally, the select signaling is a set operation for a group of terminal devices, instructing the terminal device to generate an IoT device request message. Exemplarily, an operation instruction sent by the network device to the terminal device is used to instruct the terminal device to communicate with IoT device 1. The terminal device may generate an IoT device 1 request message based on the operation instruction, such as a select signaling, which carries indication information for indicating the identification ID of IoT device 1.

[0144] Optionally, the terminal device may broadcast or multicast the select signaling. The select command is broadcast or multicast. At least one IoT device within the coverage area of ​​the terminal device's broadcast signal may receive the select signaling broadcast by the terminal device. After receiving the select signaling, the at least one IoT device may determine whether its own identification ID matches the identification ID indicated in the select signaling based on the indication information carried in the select signaling. If the IoT device's own identification ID matches the identification ID indicated in the select signaling, the IoT device is activated and awaits subsequent request messages from the terminal device. If the IoT device's own identification ID does not match the identification ID indicated in the select signaling, the IoT device may not respond or may remain in a dormant state. For example, after the terminal device broadcasts the select signaling, if the identification ID of IoT device 1 within the coverage area of ​​the terminal device's broadcast signal matches the identification ID indicated in the select signaling, IoT device 1 is activated and awaits subsequent request messages from the terminal device. The identification ID indicated in the select signaling may be partial ID information, used to indicate IoT devices with this partial ID characteristic.

[0145] Afterwards, the terminal device may broadcast a query message in the physical downlink channel to instruct the IoT device to initiate random access. Exemplarily, the query message may be query signaling, instructing IoT device 1 to initiate random access. Alternatively, the query signaling may be a slot boundary operation for a group of terminal devices.

[0146] Optionally, at least one IoT device within the coverage of the terminal device broadcast signal can receive the query message broadcast by the terminal device. After receiving the above query message, at least one IoT device generates a random number within a certain range. If the random number generated by the IoT device meets the conditions, a response message needs to be sent to the terminal device, and the IoT device carries the response message in the carrier and sends it to the terminal device. The response message may include a temporary password. For example, the temporary password can be a 16-bit random number (RN16), which is used for subsequent IoT devices to authenticate the terminal device. Exemplarily, if IoT device 1 meets the conditions, IoT device 1 needs to send a response message including the temporary password RN16 to the terminal device.

[0147] Optionally, after the terminal device receives the response message from the IoT device, it can obtain the temporary password in the response message. Afterwards, the terminal device can send a confirmation message to the IoT device in the physical downlink channel based on the response message, and carry the temporary password in the response message in the confirmation message. Among them, the confirmation message can be an acknowledgement (Acknowledge, ACK) signaling, and the ACK signaling can carry the temporary password RN16 in the response message. For example, after the terminal device receives the response message from IoT device 1, it can obtain the temporary password RN16 in the response message. Afterwards, the terminal device can send an ACK signaling to IoT device 1 in the physical downlink channel based on the response message, and the ACK signaling carries the temporary password RN16 in the response message.

[0148] In one implementation, when a terminal device communicates with an IoT device, the confirmation message is a unicast message. For example, when the terminal device communicates with IoT device 1, the ACK signaling sent by the terminal device to IoT device 1 is a unicast message.

[0149] In another implementation, when a terminal device communicates with multiple IoT devices, the confirmation message is a multicast message. For example, if the terminal device communicates with IoT device 1 and IoT device 2, the ACK signaling sent by the terminal device to IoT device 1 and IoT device 2 is a broadcast (or multicast) message.

[0150] Optionally, after receiving the confirmation message from the terminal device, the IoT device verifies the temporary password in the confirmation message and the temporary password previously generated by the IoT device. If the verification is successful, an identification message is sent to the terminal device, which carries the identification information of the IoT device. The IoT device carries the identification message in the carrier and sends it to the terminal device. Specifically, the IoT device determines whether the temporary password carried in the received confirmation message is generated by the IoT device itself. If so, it is considered that the verification is successful; if not, it is considered that the verification has failed. The identification information of the IoT device can be the Electronic Product Code (EPC) code of the IoT device. For example, IoT device 1 receives an ACK signaling from the terminal device, and the temporary password RN16 carried in the ACK signaling is generated by IoT device 1 itself, and the verification is considered successful. IoT device 1 sends an identification message to the terminal device, and the identification message carries the EPC code of IoT device 1.

[0151] Optionally, after receiving an identification message from an IoT device, the terminal device can determine the identity of the IoT device with which the terminal device is communicating. This allows the terminal device to communicate with the corresponding IoT device in a unicast manner on the physical downlink channel. For example, the terminal device can communicate with IoT device 1 based on the identity of IoT device 1. For example, the terminal device can send access signaling to IoT device 1 to perform operations such as reading, writing, and killing IoT device 1.

[0152] Optionally, when the terminal device communicates with the IoT device again, it may continue to send repeated query (query rep) signaling, for example, sending a query rep signaling at regular intervals.

[0153] In one implementation, the terminal device may perform power control on the transmission of signaling after determining the IoT device.

[0154] Exemplarily, the terminal device can determine IoT device 1 by the EPC code, and the terminal device can perform power control on access and other signaling after determining IoT device 1, that is, the terminal device can use the first transmission power to send access and other signaling.

[0155] The power control method provided in the embodiments of the present application is exemplarily described below.

[0156] It should be noted that the message names between the network elements or the names of the parameters in the messages in the following embodiments of the present application are only examples, and other names may be used in specific implementations. They are uniformly described here and will not be repeated below.

[0157] An embodiment of the present application provides a power control method, which is applied in the communication process between a terminal device and an IoT device. The following description will be given using the example of the power control method being executed by a terminal device, but the power control method can also be executed by a component in the terminal device (such as a chip or a chip system). When the communication method is implemented by a component in a terminal device, receiving / sending can be understood as input / output, that is, the component communicates with other components. As described above, the "IoT device" and the "first device" in the embodiment of the present application can be replaced with each other, the "network device" and the "second device" can be replaced with each other, and the "terminal device" and the "third device" can be replaced with each other. In addition, the processing performed by a single execution subject in the embodiment of the present application can also be divided into executions by multiple execution subjects, and these execution subjects can be logically and / or physically separated. See Figure 6 , the power control method comprises the following steps:

[0158] S101: The terminal device determines a first transmission power based on a first target power value and a first path loss. Figure 4 The terminal device shown in .

[0159] The first target power value is the detection threshold value (also called activation threshold value) of the first device. The first device can be the above Figure 4 The IoT devices shown in .

[0160] In one implementation, the detection threshold value of the first device is used to represent the detection threshold value of the first device for detecting information such as control information and / or data information. When the information strength of the control information and / or data information received by the first device is higher than the detection threshold value, the first device considers that the control information and / or data information exists; when the information strength of the control information and / or data information received by the first device is lower than the detection threshold value, the first device considers that the control information and / or data information does not exist. The existence of the control information and / or data information can be understood as: the control information and / or data information can be received by the first device. Exemplarily, the control information and / or data information includes the following: Figure 5 The select signaling, query signaling, ACK signaling, access signaling, query rep signaling, etc. are shown.

[0161] In another implementation, the detection threshold value of the first device is used to represent the detection threshold value of the carrier detected by the first device. The carrier can also be represented by a carrier signal, carrier information, etc. When the carrier strength received by the first device is higher than the detection threshold value, the first device considers that the carrier exists; when the carrier strength received by the first device is lower than the detection threshold value, the first device considers that the carrier does not exist. The existence of the carrier can be understood as: the carrier can be used to carry the information of the first device. Exemplarily, the carrier can be the carrier sent by the terminal device to the IoT device. These carriers are used for the IoT device to carry the information to be transmitted on the carrier for reflection transmission.

[0162] As a possible implementation, the first target power value (i.e., the detection threshold value or activation threshold value of the first device) may be predefined, that is, the first target power value may be preconfigured or pre-specified. For example, the first target power value is pre-configured when the first device leaves the factory.

[0163] As a possible implementation method, the first target power value may also be sent by the second device to the terminal device through radio resource control (RRC) signaling or media access control (MAC) signaling. The second device may be the above Figure 4 The network devices shown in .

[0164] In one implementation, the second device may send the first target power value to the terminal device.

[0165] Exemplarily, the first power value is 22dB, 23dB or 24dB.

[0166] In one implementation, the second device may send a second target power value and a relative offset (offset) of the first target power value relative to the second target power value to the terminal device. The second target power value is the target receive power of the second device. It is the target receive power of the second device for receiving information from the terminal device at the UU port. The information is information carried by a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH).

[0167] For example, if the second power value is 24 dB and the relative offset of the first power value with respect to the second power value is -2 dB, then the first power value may be 22 dB.

[0168] As a possible implementation manner, the first path loss is the path loss between the terminal device and the first device.

[0169] In one implementation, the first path loss may be determined based on backscattering loss of the first device.

[0170] The backscattering loss of the first device represents the internal loss of the first device when transmitting information, such as the resistance loss generated when information passes through components in the circuit of the first device, or the dielectric loss generated when information passes through a circuit board or other medium.

[0171] In the embodiments of the present application, the reflection loss of the first device can also be understood as the scattering loss of the first device; or, the reflection loss of the first device can also be understood as the reflection path loss of the first device; or, the reflection loss of the first device can also be understood as the scattering path loss of the first device, etc. The embodiments of the present application do not impose specific limitations on this.

[0172] As a possible implementation manner, the first path loss is further determined based on the transmission power of the carrier sent by the terminal device to the first device and the reception strength of the second information.

[0173] The transmission power of the carrier sent by the terminal device to the first device is the initial transmission power. In other words, the transmission power of the carrier sent by the terminal device to the first device is the transmission power of the carrier before the present application performs power control on the terminal device.

[0174] Optionally, the transmission power of the carrier sent by the terminal device to the first device can be any value of 23dB, 26dB, 29dB or 31dB.

[0175] Alternatively, the second information is information reflected by the carrier and carried by the first device for reflection transmission. Alternatively, the second information can also be understood as the reflection information of the first device based on the carrier. Alternatively, the second information can also be understood as information of the first device carried or carried by the carrier, which is not limited in this embodiment of the present application. Wherein, the carrier is the carrier used for reflection transmission.

[0176] Exemplarily, the second information may be the RN16 signaling reflected by the carrier carried by the first device, and the receiving strength of the second information is the receiving strength of the RN16 received by the terminal device.

[0177] In this application, "received" can also be understood as "detected." "Based on" and "according to" are interchangeable. "Received" and "detected" are interchangeable. "Receiving" and "detecting" are interchangeable. "Sending" and "transmitting" are interchangeable.

[0178] Optionally, the receiving strength of the second information may also be expressed as the receiving power of the second information. For example, the receiving power of the second information is the receiving power of the terminal device receiving the RN16 signaling.

[0179] In one implementation, the device that transmits the carrier to the first device may also be a fourth device. The transmit power of the carrier transmitted to the first device is the transmit power of the carrier transmitted by the fourth device to the first device. The fourth device may transmit the transmit power of the carrier transmitted to the first device to the terminal device, so that the terminal device can determine the first type of path loss.

[0180] Optionally, the fourth device is used to provide a carrier for the first device and is an excitation source for the first device. The fourth device may be located in the topology 2 where the first device is located, or not located in the topology 2 where the first device is located, and this embodiment of the application does not limit this.

[0181] In one implementation, the first path loss may be determined based on the transmission power of the carrier sent by the terminal device to the first device, the reflection loss of the first device, and the reception strength of the second information.

[0182] For example, the first path loss satisfies:

[0183] PL = (Pt_cw - BS_loss - Pr) / 2 Formula (1)

[0184] Among them, PL represents the first path loss, Pt_cw represents the transmission power of the carrier sent by the terminal device to the first device, BS_loss represents the reflection loss of the first device, and Pr represents the receiving strength of the second information.

[0185] In one implementation, the second information may be RN16, and Pr may be Pr_rn16, indicating the receiving strength of RN16.

[0186] It should be understood that the above formula (1) is only an example formula for calculating the first path loss. Other usable formulas can be derived through equivalent transformation and other methods, and the present embodiment does not limit this. For example, the " / 2" in the above formula can be transformed into other coefficients depending on the scenario. For example, Pr can be multiplied by a coefficient.

[0187] In this embodiment of the present application, RN16 can also be replaced by other information, such as a random number sequence of other digits.

[0188] In one implementation, the terminal device may determine the first path loss generated when the terminal device sends information such as control information and / or data information to the first device through the above formula (1).

[0189] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with one of the multiple first devices, for example, the terminal device communicates with IoT device 1. Figure 5 As shown, the first path loss is the path loss generated when the terminal device sends unicast information. Exemplarily, the first path loss is the path loss generated when the terminal device sends ACK signaling or access signaling.

[0190] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with two of the multiple first devices, for example, the terminal device communicates with IoT device 1 and IoT device 2. Figure 5 As shown, the first path loss is the path loss generated when the terminal device sends unicast information. Exemplarily, the first path loss is the path loss generated when the terminal device sends access signaling.

[0191] In one implementation, the terminal device may determine the first path loss generated when the terminal device sends a carrier to the first device through the above formula (1).

[0192] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with one of the multiple first devices, for example, the terminal device communicates with IoT device 1. Figure 7As shown in (a), the first path loss is the path loss generated when the terminal device sends the carrier in unicast mode. Exemplarily, the first path loss is the path loss generated when the terminal device sends the carrier after ACK signaling and before query rep signaling or before new select / query signaling.

[0193] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with two of the multiple first devices, for example, the terminal device communicates with IoT device 1 and IoT device 2. Figure 7 As shown in (b), the first path loss is the path loss generated when the terminal device sends the carrier in unicast mode. Exemplarily, the first path loss is the path loss generated when the terminal device sends the carrier after access signaling and before query rep signaling or before new select / query signaling.

[0194] As a possible implementation manner, when the first device is a plurality of first devices, the first path loss may also be configured for the second device.

[0195] In one implementation, “a first path loss when the first device is a plurality of first devices” is used to indicate a path loss generated when the terminal device sends information such as control information and / or data information to the plurality of first devices.

[0196] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with one of the multiple first devices, for example, the terminal device communicates with IoT device 1. Figure 5 As shown, the first path loss is the path loss generated when the terminal device sends multicast information (or broadcast information). Exemplarily, when the first device is a plurality of first devices, the first path loss is the path loss generated when the terminal device sends select signaling or query signaling.

[0197] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with two of the multiple first devices, for example, the terminal device communicates with IoT device 1 and IoT device 2. Figure 5 As shown, the first path loss is the path loss generated when the terminal device sends multicast information. Exemplarily, when the first device is a plurality of first devices, the first path loss is the path loss generated when the terminal device sends select signaling, query signaling, or ACK signaling.

[0198] In one implementation, “a first path loss when the first device is a plurality of first devices” is also used to indicate a path loss generated when the terminal device sends a carrier to the plurality of first devices.

[0199] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with one of the multiple first devices, for example, the terminal device communicates with IoT device 1. Figure 7 As shown in (a), the first path loss is the path loss generated when the terminal device sends a carrier in a multicast manner. Exemplarily, the first path loss of the first device for multiple first devices is the path loss generated when the terminal device sends a carrier after the select signaling and before the ACK signaling.

[0200] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with two of the multiple first devices, for example, the terminal device communicates with IoT device 1 and IoT device 2. Figure 7 As shown in (b), the first path loss is the path loss generated when the terminal device sends a carrier in a multicast manner. Exemplarily, the first path loss of the first device is the path loss generated when the terminal device sends a carrier after the select signaling.

[0201] In one implementation, the first path loss is related to the maximum coverage range of the terminal device. A terminal device is a device in a topology that assists a second device in communicating with the first device. The second device can estimate the maximum coverage range of the terminal device and determine the maximum equivalent path loss of the terminal device based on the maximum coverage range. Optionally, the maximum equivalent path loss of the terminal device can be represented as the first path loss of the terminal device.

[0202] Specifically, when there are multiple first devices, the first path loss can be determined based on the maximum coverage range of the terminal device, thereby determining a larger first transmit power to ensure that the multiple first devices can communicate with the terminal device. The maximum coverage range of the terminal device can be a circular range with the terminal device as the center and the distance to the farthest first device as the radius.

[0203] Optionally, the second device may send the first path loss to the terminal device.

[0204] As a possible implementation method, when the first device is a plurality of first devices, the terminal device may further determine a plurality of first path losses corresponding to the plurality of first devices through the above formula (1), determine the largest first path loss among the plurality of first path losses as the first path loss corresponding to the plurality of first devices, and subsequently determine the first transmission power based on the first path loss.

[0205] For example, when there are two first devices, for example, IoT device 1 and IoT device 2, the first path loss corresponding to IoT device 1 is calculated and obtained by formula (1) as 0.8 dB, and the first path loss corresponding to IoT device 2 is calculated and obtained by formula (1) as 0.5 dB. Therefore, the first path loss of the two first devices is the larger path loss value of 0.8 dB.

[0206] In one implementation, the terminal device may determine the first transmit power of the terminal device according to the first path loss and the first target power value.

[0207] The first transmission power is the transmission power when the terminal device sends information to the first device after power control.

[0208] Exemplarily, the first transmit power of the terminal device satisfies:

[0209] P1=P2+α*PL Formula (2)

[0210] Wherein, P1 represents the first transmit power, P2 represents the first target power value, PL represents the first path loss, and α represents the path loss compensation factor.

[0211] Optionally, the path loss compensation factor is an adjustment parameter for compensating the first transmission power of the terminal device to the IoT device.

[0212] As a possible implementation, the path loss compensation factor may be predefined, that is, the path loss compensation factor may be preconfigured or predefined. For example, the path loss compensation factor is preconfigured when the first device leaves the factory.

[0213] As a possible implementation, the path loss compensation factor may also be sent by the second device to the terminal device via signaling. That is, the path loss compensation factor used on the IoT communication interface may be notified to the terminal device via RRC signaling or MAC signaling.

[0214] Optionally, the terminal device may partially compensate for the path loss. For example, the path loss compensation factor α may be less than 1, such as 0.8.

[0215] Optionally, the terminal device may fully compensate for the path loss. For example, the path loss compensation factor α may be set to 1.

[0216] S102. The terminal device sends first information to the first device at a first transmission power.

[0217] Optionally, the first information is at least one of control information, data information, or a carrier. The terminal device may send the first information to the first device at a first transmission power.

[0218] In this way, the present application adopts a method different from the prior art to calculate the first path loss, and the calculation of the first path loss is more flexible. In addition, the third device can determine the first transmission power based on the reflection loss of the first device and the first target power value, thereby determining the first transmission power of the third device. The third device sends information to the first device at the first transmission power. The power value of the information when it reaches the IoT device is maintained at a level that the first device can receive and does not exceed the first target power value of the first device (or the power value of the information when it reaches the IoT device exceeds the first target power value of the IoT device and is kept within a smaller range). The power consumption of the third device when sending the first information to the first device is reduced, and the control of the transmission power can be achieved.

[0219] In one possible implementation, the reflection loss of the first device in step S101 may be predefined, configured by the second device, or reported by the first device (i.e., the first device sends the reflection loss to the terminal device). In this application, the configuration may be configured via signaling. The signaling may be at least one of RRC signaling or MAC signaling.

[0220] In some embodiments, the reflection loss of the first device may be predefined.

[0221] Optionally, the reflection loss of the first device is related to the type of the first device.

[0222] For example, the types of the first device may include type A, type B, and type C. Each type of first device corresponds to a different reflection loss. Specifically, the reflection loss corresponding to a type A first device may be 0.5 dB; the reflection loss corresponding to a type B first device may be 0.7 dB; and the reflection loss corresponding to a type C first device may be 0.9 dB.

[0223] For another example, the reflection losses corresponding to the first devices of type A and type B are the same, and the reflection loss corresponding to the first device of type C is another. Specifically, the reflection loss corresponding to the first devices of type A and type B may be 0.5 dB, and the reflection loss corresponding to the first device of type C may be 0.9 dB.

[0224] For example, the reflection loss corresponding to the first devices of type A and type C is the same, and the reflection loss corresponding to the first device of type B is different. The reflection loss corresponding to the first devices of type A and type C may be 0.5 dB, and the reflection loss corresponding to the first device of type B may be 0.9 dB.

[0225] For example, the return loss corresponding to the first devices of type B and type C is the same, and the return loss corresponding to the first device of type A is different. The return loss corresponding to the first devices of type B and type C may be 0.5 dB, and the return loss corresponding to the first device of type A may be 0.9 dB.

[0226] The embodiments of the present application do not specifically limit the number of first device types or the magnitude of the reflection loss corresponding to each type of first device. Specifically, the first device may feedback type information, so that the terminal device can perform the above-mentioned determination and other operations based on the feedback type information. As an example, the feedback type information may be carried in the RN16 or the EPC.

[0227] In other embodiments, the reflection loss of the first device may be configurable for the second device.

[0228] Optionally, the second device may determine the reflection loss of the first device based on an empirical reflection loss of the first device, and send the reflection loss of the first device to the terminal device.

[0229] In other embodiments, the reflection loss of the first device may be reported by the first device.

[0230] Exemplarily, the first device may report the reflection loss of the first device to the terminal device via RN16 signaling. For example, after the terminal device sends a query signaling to the first device, it may detect the RN16 signaling from the first device, where the RN16 signaling carries the reflection loss of the first device.

[0231] As a possible implementation, if the first device can perform power amplification (PA), for example, the first device is the aforementioned device B, the terminal device may further determine a PA adjustment value of the first device, and determine the first path loss based on the PA adjustment value of the first device.

[0232] Optionally, the power adjustment value can be a switch, indicating that the first device can perform power amplification; or indicating that the first device cannot perform power amplification. When the first device can perform power amplification, the power adjustment value can be a fixed value. For example, the power adjustment value can be 1dB, 2dB, 3dB, 5dB, or 8dB. The power adjustment value can also be a multiple of the power adjustment values ​​exemplified above.

[0233] In one implementation, the power amplifier adjustment value may be predefined. That is, the power amplifier adjustment value may be preconfigured or pre-specified. For example, the power amplifier adjustment value is pre-configured when the first device leaves the factory.

[0234] In one implementation, the power amplifier adjustment value may also be reported by the first device. For example, the first device may report the power amplifier adjustment value of the first device in RN16 signaling.

[0235] Specifically, the terminal device can activate the power amplifier adjustment value through activation signaling such as select signaling or query signaling. That is, the terminal device can instruct the first device to report the power amplifier adjustment value of the first device through select signaling or query signaling. Afterwards, the first device can report the power amplifier adjustment value of the first device in RN16 signaling.

[0236] In one implementation, the first path loss may be determined based on the transmission power of the carrier sent by the terminal device to the first device, the reflection loss of the first device, the reception strength of the second information, and the power adjustment value of the first device.

[0237] For example, the first path loss satisfies:

[0238] PL = (Pt_cw - BS_loss - Pr - PA) / 2 Formula (3)

[0239] Among them, PL represents the first path loss, Pt_cw represents the transmission power of the carrier sent by the terminal device to the first device, BS_loss represents the reflection loss of the first device, Pr represents the receiving strength of the second information, and PA represents the power adjustment value of the first device.

[0240] In one implementation, the second information may be RN16, and Pr may be Pr_rn16, which indicates the receiving strength of RN16.

[0241] It should be understood that the above formula (3) is only an example formula for calculating the first path loss. Other usable formulas can be derived through equivalent transformation and other methods, and the present embodiment does not limit this. For example, the " / 2" in the above formula can be transformed to other sparseness depending on the scenario. For example, loss-Pr_rn16 can be multiplied by a coefficient.

[0242] In this embodiment of the present application, RN16 can also be replaced by other information, such as a random number sequence of other digits.

[0243] In one implementation, the first path loss may be determined based on the transmit power of a carrier sent by the terminal device to the first device, a reflection loss of the first device, a reception strength of the second information, and a frequency conversion offset. The frequency conversion offset is the amount of transmission power loss incurred by the first device during frequency conversion.

[0244] Among them, the frequency band of the carrier sent by the terminal device may be different from the frequency band of the carrier containing the control information / data information sent to the IoT device. The frequency band of the carrier sent by the terminal device is different from the frequency band of the information reflected by the IoT device (such as the second information). The frequency conversion between different frequency bands may cause power offset.

[0245] For example, the first path loss satisfies:

[0246] PL=(Pt_cw-BS_loss-Pr-offset_frchange) / 2 Formula (4)

[0247] Among them, PL represents the first path loss, Pt_cw represents the transmission power of the carrier sent by the terminal device to the first device, BS_loss represents the reflection loss of the first device, Pr represents the receiving strength of the second information, and offset_frchange is the offset of the frequency conversion.

[0248] It should be understood that the above formula (4) is only an example formula for calculating the first path loss. Other usable formulas can be derived through equivalent transformation and other methods, and the present embodiment does not limit this. For example, the " / 2" in the above formula can be transformed into other coefficients depending on the scenario.

[0249] In one implementation, the first path loss may be determined based on the transmit power of a carrier sent by the terminal device to the first device, a reflection loss of the first device, a reception strength of the second information, a power adjustment value of the first device, and a frequency conversion offset. The frequency conversion offset is the amount of transmission power loss incurred by the first device when performing frequency conversion.

[0250] For example, the first path loss satisfies:

[0251] PL=(Pt_cw-BS_loss-Pr-PA-offset_frchange) / 2 Formula (5)

[0252] Among them, PL represents the first path loss, Pt_cw represents the transmission power of the carrier sent by the terminal device to the first device, BS_loss represents the reflection loss of the first device, Pr represents the receiving strength of the second information, PA represents the power adjustment value of the first device, and offset_frchange is the offset of the frequency conversion.

[0253] It should be understood that the above formula (5) is only an example formula for calculating the first path loss. Other usable formulas can be derived through equivalent transformation and other methods, and the present embodiment does not limit this. For example, the " / 2" in the above formula can be transformed into other coefficients depending on the scenario.

[0254] As a possible implementation manner, when the first device is a plurality of first devices, the first transmission power in the above step S101 may also be configured for the second device.

[0255] Optionally, the first transmission power is related to the maximum coverage range of the terminal device.

[0256] The second device may determine the first transmit power according to the first path loss determined based on the maximum coverage range of the terminal device and the first target power value.

[0257] In one implementation, when the first device is a plurality of first devices, the terminal device may also determine the first transmission power based on the transmission power of uplink information sent to the network device at the Uu interface.

[0258] Optionally, the terminal device may directly use the transmission power of uplink information sent by the terminal device to the network device at the Uu interface as the first transmission power.

[0259] Alternatively, the terminal device may superimpose an offset on the transmit power of uplink information sent by the terminal device to the network device over the Uu interface as the first transmit power. The offset may be configured by the terminal device, or the offset may be configured by the second device. This embodiment of the present application does not impose any specific restrictions on this.

[0260] Alternatively, the second device may configure the first transmission power as the transmission power used by the terminal device to send uplink information to the network device at the Uu interface.

[0261] Optionally, "the first transmission power when the first device is multiple first devices" is used to indicate the transmission power when the terminal device sends control information and / or data information and / or carrier to multiple first devices.

[0262] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with one of the multiple first devices, for example, the terminal device communicates with IoT device 1. Figure 5 As shown, the first transmission power is the transmission power when the terminal device sends multicast information, for example, the first transmission power is the transmission power when the terminal device sends select signaling and query signaling. Figure 7 As shown in (a), the first transmission power is the transmission power of the carrier after the terminal device sends the select signaling and before the ACK signaling.

[0263] For example, the signal coverage of the terminal device includes multiple first devices. When the terminal device wants to communicate with two of the multiple first devices, for example, the terminal device communicates with IoT device 1 and IoT device 2. Figure 5As shown, the first transmission power is the transmission power when the terminal device sends multicast information, for example, the first transmission power is the transmission power when the terminal device sends select signaling, query signaling, and ACK signaling. For another example, Figure 7 As shown in (b), the first transmission power is the transmission power of the carrier after the terminal device sends the select signaling.

[0264] Optionally, the second device may configure the first transmission power for the terminal device through at least one of RRC signaling or MAC signaling.

[0265] As a possible implementation, the terminal device may also use a second power control mode to send third information to the second device at a second transmit power. The second power control mode is different from the first power control mode. The third information may be control information, data information, or the like. The second transmit power is determined based on a second target power value and a second path loss. The second target power value is a target receive power of the second device, and the second path loss is determined based on the reference signal receive power.

[0266] In related technologies, in topology 1, frequency division duplex (FDD) uplink spectrum is used for IoT device-to-base station communication, and frequency division duplex (FDD) downlink spectrum is used for base station-to-IoT device communication. In topologies 2-4, FDD uplink spectrum is used for IoT device-to-UE communication, without distinguishing between uplink and downlink, potentially causing co-channel and adjacent channel interference.

[0267] To solve this problem, in some embodiments of the present application, Figure 8 As shown, the IoT device can send the first information to the terminal device in link 2.2 through the first sub-resource. The terminal device sends the third information to the network device in link 1.1 through the second sub-resource. The first sub-resource and the second sub-resource both belong to the first frequency domain resource.

[0268] That is to say, the terminal device uses the first power control method on the first sub-resource to send the first information to the IoT device at the first transmission power; and uses the second power control method on the second sub-resource to send the third information to the network device at the second transmission power.

[0269] Exemplarily, the first sub-resource and the second sub-resource both belong to one component carrier (CC).

[0270] Optionally, the terminal device may also send information to the IoT device in link 2.1 through the first sub-resource. The information is carried in a carrier provided by the terminal device.

[0271] In this way, the terminal device uses different transmission powers for information transmission on different links occupying the first frequency domain resources. That is, the terminal device occupies different sub-resources and uses different transmission powers to send information, which can reduce co-channel and adjacent channel interference.

[0272] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between different devices. It is understandable that, in order to realize the above functions, the first device, the second device, and the third device include hardware structures and / or software modules corresponding to the execution of each function. In combination with the units and algorithm steps of each example described in the embodiment disclosed in this application, the embodiment of 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 a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present application.

[0273] In the embodiment of the present application, the power control device can be divided into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units 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.

[0274] Figure 9 A schematic block diagram of a power control device provided in an embodiment of the present application is shown. The power control device 1800 can exist in the form of software, or can be a device, or a component in a device (such as a chip system). The power control device 1800 includes: a processing unit 1802 and a communication unit 1803.

[0275] The communication unit 1803 can also be divided into a sending unit (not shown in Figure 9 ) and the receiving unit (not shown in Figure 9 As shown in FIG. 1 ). Exemplarily, the sending unit is configured to support the power control apparatus 1800 in sending information to other devices (or network elements). The receiving unit is configured to support the power control apparatus 1800 in receiving information from other devices.

[0276] When the power control device 1800 is used to implement the function of the third device, the processing unit 1802 can be used to support the power control device 1800 to perform Figure 6 S101 in and / or other processes for the solution described herein. The communication unit 1803 is used to support communication between the power control device 1800 and other devices (e.g., the first device, the second device). For example, the communication unit is used to support the power control device 1800 to perform Figure 6 S102 shown and / or other processes for the solutions described herein.

[0277] Optionally, the power control device 1800 may further include a storage unit 1801 for storing program codes and data of the power control device 1800 . The data may include but is not limited to original data or intermediate data.

[0278] Exemplarily, the processing unit 1802 may be a processor or controller, such as a CPU, a general-purpose processor, a digital signal processing (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0279] The communication unit 1803 can be a communication interface, a transceiver or a transceiver circuit, etc. Exemplarily, the communication interface is a general term. In a specific implementation, the communication interface may include multiple interfaces, for example, it may include: an interface and / or other interfaces between the first device and the third device; an interface and / or other interfaces between the second device and the third device.

[0280] The storage unit 1801 may be a memory.

[0281] When the processing unit 1802 is a processor, the communication unit 1803 is a communication interface, and the storage unit 1801 is a memory, the power control device 1900 involved in the embodiment of the present application can be Figure 10 shown.

[0282] See Figure 10 As shown, the power control device 1900 includes: a processor 1902 , a transceiver 1903 , and a memory 1901 .

[0283] For example, transceiver 1903 may be a standalone transmitter that can be used to send information to other devices, or a standalone receiver that can be used to receive information from other devices. The transceiver may also be a component that integrates the functions of sending and receiving information. The embodiments of the present application do not limit the specific implementation of the transceiver.

[0284] Optionally, the power control device 1900 may further include a bus 1904. For example, the transceiver 1903, the processor 1902, and the memory 1901 may be interconnected via the bus 1904; the bus 1904 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 1904 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0285] Those skilled in the art will appreciate that the above embodiments can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. 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 wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. 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 available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0286] 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 or other forms.

[0287] 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 devices (e.g., terminal devices). Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0288] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each functional unit may exist independently, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0289] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general-purpose hardware, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, hard disk or optical disk, and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0290] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A power control method, characterized in that: Applicable to third-party devices, including: determining a first transmit power based on a first target power value and a first path loss, wherein the first target power value is a detection threshold value or an activation threshold value of the first device; The first path loss is determined based on the reflection loss of the first device, or the first path loss is configured for the second device; First information is sent to the first device at the first transmit power.

2. The method according to claim 1, characterized in that The first device is a plurality of first devices, The determining the first transmit power based on the first target power value and the first path loss includes: The first transmit power is determined based on a maximum value of the first target power value and the first path loss of at least one first device, where the first path loss is determined based on a reflection loss of the first device.

3. The method according to claim 1 or 2, characterized in that The first path loss is further determined based on a transmission power of a carrier sent to the first device and a reception strength of second information, where the second information is information reflected by the carrier or information transmitted by reflection on the carrier.

4. The method according to claim 3, characterized in that The first path loss is further determined based on a power amplifier adjustment value and / or a frequency conversion offset of the first device.

5. The method according to claim 4, characterized in that The frequency conversion offset is the transmission power loss generated by the first device when performing frequency conversion.

6. The method according to claim 1 or 2, characterized in that The first path loss is related to the maximum coverage range of the third device.

7. The method according to any one of claims 1 to 6, characterized in that The reflection loss is related to the type of the first device.

8. The method according to any one of claims 1 to 7, characterized in that The reflection loss is predefined; or, The reflection loss is configured for the second device; or, The reflection loss is reported by the first device.

9. The method according to any one of claims 1 to 8, characterized in that The first target power value is predefined; or, The first target power value is configured for the second device.

10. The method according to any one of claims 1 to 9, characterized in that The first information is at least one of control information, data information or carrier.

11. The method according to claim 10, characterized in that The first information is the control information or the data information, and the first target power value is a detection threshold or an activation threshold for the first device to detect the control information or the data information; or The first information is the carrier, and the first target power value is a detection threshold or an activation threshold for the first device to detect the carrier.

12. The method according to any one of claims 1 to 11, characterized in that Also includes: determining a second transmit power according to a second target power value and a second path loss, wherein the second target power value is a target receive power of the second device, and the second path loss is determined based on a reference signal receive power; Send third information to the second device at the second transmit power.

13. The method according to claim 12, characterized in that The first information occupies the first sub-resource, the third information occupies the second sub-resource, and the first sub-resource and the second sub-resource both belong to the first frequency domain resource.

14. The method according to claim 12 or 13, characterized in that The type of the first device is different from the type of the second device; or, A link for sending the first information to the first device is different from a link for sending the second information to the second device.

15. A power control method, characterized in that: Applied to a third device, the method includes: Using a first power control method on the first sub-resource, sending first information to the first device at a first transmit power; Using a second power control mode on the second sub-resource, sending third information to the second device at a second transmit power; The first power control mode is different from the second power control mode; the first sub-resource and the second sub-resource both belong to the first frequency domain resources.

16. The method according to claim 15, characterized in that The type of the first device is different from the type of the second device; Alternatively, a link for sending the first information to the first device is different from a link for sending the third information to the second device.

17. The method according to claim 15 or 16, characterized in that The method further comprises: The first transmission power is determined according to a first path loss, where the first path loss is determined based on the transmission power of a carrier sent to the first device, the reception strength of second information, and the reflection loss of the first device, where the second information is information reflected by the carrier or information transmitted by reflection on the carrier.

18. The method according to claim 17, characterized in that The first path loss is further determined based on a power amplifier adjustment value and / or a frequency conversion offset of the first device.

19. The method according to any one of claims 15 to 18, characterized in that The first device is a plurality of first devices, and the method further includes: The first transmit power is determined according to the first path loss, where the first path loss comes from the second device and is related to a maximum coverage range of the third device.

20. The method according to any one of claims 15 to 18, characterized in that The first device is a plurality of first devices, and the method further includes: The first transmit power is determined according to the first path loss, where the first path loss comes from a second device, and the first transmit power is determined according to a maximum value of the first path losses of a plurality of the first devices.

21. The method according to claim 19 or 20, characterized in that The first transmit power is determined according to the first path loss, including: The first transmit power is determined according to the first path loss and a first target power value, where the first target power value is a detection threshold value or an activation threshold value for the first device to detect first information.

22. The method according to any one of claims 15 to 21, characterized in that The reflection loss of the first device is predefined by the first device; or, the reflection loss of the first device is configured by the second device.

23. The method according to any one of claims 15 to 22, characterized in that The method comprises: Receive the second information from the first device; the second information is information reflected based on the carrier; the second signal is used to indicate at least one of the reflection loss of the first device, the power amplification capability of the first device, and the power amplification adjustment value of the first device.

24. The method according to any one of claims 15 to 23, characterized in that The first information includes at least one of control information, data information or carrier.

25. A communication device, characterized in that: The communication device comprises a module for executing the method according to any one of claims 1 to 14, or comprises a module for executing the method according to any one of claims 15 to 24.

26. A communication device, characterized in that: The communication device comprises a processor configured to perform the method according to any one of claims 1 to 14, or configured to perform the method according to any one of claims 15 to 24.

27. A computer-readable storage medium, characterized in that The computer-readable storage medium comprises instructions, which, when executed, cause the method according to any one of claims 1 to 14 to be implemented, or cause the method according to any one of claims 15 to 24 to be implemented.

28. A computer program product, characterized in that The computer program product comprises instructions which, when executed, cause the method according to any one of claims 1 to 14 to be implemented, or cause the method according to any one of claims 15 to 24 to be implemented.

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