CN115580338A

CN115580338A - Power control method, device, equipment and storage medium

Info

Publication number: CN115580338A
Application number: CN202211216755.6A
Authority: CN
Inventors: 饶建兵; 向开恒; 刘晨; 徐磊; 贺泉
Original assignee: China Star Network Innovation Research Institute Co ltd
Current assignee: China Star Network Innovation Research Institute Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-01-06

Abstract

An embodiment of the application provides a power control method, a device and a storage medium, wherein the method comprises the following steps: determining a target scanning area; acquiring a corresponding relation between a preset scanning area and transmitting power; according to the target scanning area, determining target transmitting power corresponding to the target scanning area in a preset corresponding relation between the scanning area and the transmitting power; and scanning the transmitting signal to the target scanning area according to the target transmitting power. In this way, the power control process of the satellite can be simplified.

Description

Power control method, device, equipment and storage medium

Technical Field

The present application relates to the field of satellite technologies, and in particular, to a power control method, apparatus, device, and storage medium.

Background

In recent years, low-earth-orbit satellite communication has the characteristics of small communication delay, global coverage and the like. When the satellite terminal scans and transmits electromagnetic wave signals to the ground mobile terminal at different transmission angles, power control is needed so as to ensure the communication quality of all users.

In the prior art, satellites generally transmit signals with the aim of equalizing the power spectral density on the ground, which is the power carried per unit frequency wave. Based on the target, a closed-loop power control method is usually adopted for the satellite-side transmission power control. That is, the satellite scans and transmits electromagnetic wave signals to the ground with preset power, and the ground terminal equipment receives the electromagnetic wave signals and performs channel measurement to obtain channel measurement results such as power spectral density and loss value. Then, the channel measurement result is reported to the satellite, and the satellite adjusts the transmitting power according to the received channel measurement results of different ground terminal equipment, so as to ensure that the power spectral density of the electromagnetic wave signals received by each ground terminal equipment in the coverage area of the satellite is equal, thereby forming closed-loop control.

However, the closed-loop power control method is complex in process, when the satellite scans the transmission signals at different angles, the transmission power needs to be continuously adjusted according to the channel measurement results reported by different ground terminal devices, and the requirement on the power control capability of the satellite is high.

Disclosure of Invention

In view of this, the present application provides a power control method, apparatus, device and storage medium, so as to solve the problem that the process of controlling the satellite-side transmission power by using the closed-loop power control method in the prior art is complicated.

In a first aspect, an embodiment of the present application provides a power control method, including:

determining a target scanning area;

acquiring a corresponding relation between a preset scanning area and transmitting power;

according to the target scanning area, determining target transmitting power corresponding to the target scanning area in the corresponding relation between the preset scanning area and the transmitting power;

and scanning and transmitting signals to the target scanning area according to the target transmitting power.

Preferably, before the determining the target scanning area, the method further includes:

acquiring the total transmitting power of a target wave beam; the target beam comprises a signaling beam or a service beam;

acquiring a satellite coverage area, and dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the size of a preset scanning area;

and determining the transmission power corresponding to each scanning area in at least one scanning area corresponding to the target beam according to the total transmission power of the target beam, and generating the corresponding relation between the at least one scanning area corresponding to the target beam and the transmission power.

Preferably, the preset scanning area size includes: the size of the preset scanning area corresponding to the signaling beam or the size of the preset scanning area corresponding to the service beam.

Preferably, the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the size of the preset scanning area corresponding to the target beam includes:

dividing the satellite coverage area into at least one wave position corresponding to the target wave beam according to the size of a preset wave position corresponding to the target wave beam;

determining, according to the total transmission power of the target beam, the transmission power corresponding to each of at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

determining a distance between each wave position in at least one wave position corresponding to the target wave beam and a satellite, and a scanning angle of the satellite corresponding to each wave position in at least one wave position corresponding to the target wave beam;

determining the path loss and the scanning loss corresponding to each wave position according to the distance between each wave position and the satellite and the scanning angle of the satellite corresponding to each wave position;

obtaining the terminal gain parameter corresponding to each wave position

Determining a loss value corresponding to each wave position according to the terminal gain parameter corresponding to each wave position, the path loss corresponding to each wave position and the scanning loss;

and determining the transmitting power corresponding to each wave position according to the total transmitting power of the target wave beam and the loss value corresponding to each wave position, and generating the corresponding relation between at least one wave position corresponding to the target wave beam and the transmitting power.

dividing the satellite coverage area into at least one concentric ring corresponding to the target beam according to the size of a preset concentric ring corresponding to the target beam;

determining the distance between each concentric ring in the at least one concentric ring corresponding to the target beam and a satellite and the satellite scanning angle corresponding to each concentric ring in the at least one first concentric ring corresponding to the target beam;

determining the path loss and the scanning loss corresponding to each concentric ring according to the distance between each concentric ring and the satellite scanning angle corresponding to each concentric ring;

determining a loss value corresponding to each concentric ring according to the path loss and the scanning loss corresponding to each concentric ring;

and determining the transmission power corresponding to each concentric ring according to the total transmission power of the target beam and the loss value corresponding to each concentric ring, and generating the corresponding relation between at least one concentric ring corresponding to the target beam and the transmission power.

when the target wave beam comprises a service wave beam, acquiring the area of at least one user terminal in the satellite coverage area;

acquiring a user communication parameter corresponding to each user terminal in the at least one user terminal;

determining the distance between each user terminal and a satellite and the satellite scanning angle corresponding to each user terminal according to the information of the area where each user terminal in the at least one user terminal is located;

determining the path loss and the scanning loss of each user terminal according to the distance between each user terminal and a satellite and the satellite scanning angle corresponding to each user terminal;

determining a loss value corresponding to each user terminal according to the user communication parameters, the path loss and the scanning loss corresponding to each user terminal;

and determining the service beam transmitting power corresponding to the area of each user terminal according to the total transmitting power of the target beam and the loss value corresponding to each user terminal, and generating the corresponding relation between the area of at least one user terminal corresponding to the service beam and the transmitting power.

Preferably, the user communication parameter of each ue includes a terminal gain parameter or a terminal-specific loss parameter corresponding to each ue.

Preferably, the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam includes:

when the target beam comprises a service beam, dividing the satellite coverage area into at least one parallel strip corresponding to the target beam according to the size of a preset parallel strip corresponding to the target beam;

determining the distance between each strip of the at least one parallel strip and a satellite and the satellite scanning angle corresponding to each strip;

determining the path loss and the scanning loss corresponding to each strip according to the distance between each strip in the at least one parallel strip and the satellite scanning angle corresponding to each strip;

determining a loss value corresponding to each strip according to the path loss and the scanning loss corresponding to each strip;

and determining the target beam transmitting power corresponding to each strip according to the total transmitting power of the target beam and the loss value corresponding to each strip, and generating the corresponding relation between at least one strip corresponding to the target beam and the transmitting power.

when the target beam is a service beam, dividing the satellite coverage area into at least one concentric ring corresponding to the target beam according to the size of the concentric ring corresponding to the target beam;

acquiring a preset power distribution proportion parameter, and determining the preset power distribution proportion parameter as the power distribution proportion parameter of the outermost concentric ring of the at least one concentric ring;

determining the power distribution proportion parameters of the concentric rings, except the outermost ring, in the at least one concentric ring according to the power distribution proportion parameters of the outermost ring, and according to a preset rule; the preset rule comprises that in the at least one concentric ring, the power distribution proportion parameter of the concentric ring with the smaller outer ring radius is larger;

and determining the transmitting power corresponding to each concentric ring according to the total transmitting power of the target wave beam and the power proportion distribution parameter of each concentric ring in the at least one concentric ring, and generating the corresponding relation between the at least one concentric ring corresponding to the target wave beam and the transmitting power.

Preferably, before the obtaining the corresponding relationship between the preset scanning area and the transmission power, the method further includes:

determining a beam to be used; the beam to be used comprises a signaling beam or a service beam;

the obtaining of the corresponding relationship between the preset scanning area and the transmission power includes:

acquiring a corresponding relation between a preset scanning area corresponding to the beam to be used and the transmitting power;

determining, according to the target scanning area and in the preset correspondence between the scanning area and the transmission power, a target transmission power corresponding to the target scanning area includes:

according to the target scanning area, determining target transmitting power corresponding to the target scanning area in a corresponding relation between a preset scanning area corresponding to the beam to be used and transmitting power;

the scanning the transmission signal to the target scanning area according to the target transmission power comprises:

and scanning and transmitting signals to the target scanning area through the beams to be used according to the target transmitting power.

Preferably, the determining the target scanning area comprises:

when the beam to be used is a signaling beam, acquiring at least one scanning area corresponding to the service beam;

determining a target scanning area in at least one scanning area corresponding to the signaling beam according to a preset scanning sequence of at least one scanning area corresponding to the signaling beam;

or, when the beam to be used is a service beam, determining the position information of the target user terminal;

acquiring at least one scanning area corresponding to the service beam;

and according to the position information of the target user terminal, determining a scanning area corresponding to the target user terminal in the scanning area corresponding to the service beam, and determining the scanning area as a target scanning area.

In a second aspect, an embodiment of the present application provides a power control apparatus, including:

a processing unit for determining a target scanning area;

the acquisition unit is used for acquiring the corresponding relation between a preset scanning area and the transmitting power;

the processing unit is further configured to determine, according to the target scanning area, a target transmitting power corresponding to the target scanning area in the preset correspondence between the scanning area and the transmitting power;

the processing unit is further configured to scan the transmission signal to the target scanning area according to the target transmission power.

Preferably, the obtaining unit is further configured to obtain a total transmit power of the target beam; the target beam comprises a signaling beam or a service beam;

preferably, the obtaining unit is further configured to obtain a satellite coverage area, and divide the satellite coverage area into at least one scanning area corresponding to the target beam according to a preset scanning area size;

preferably, the processing unit is further configured to determine, according to the total transmission power of the target beam, a transmission power corresponding to each scanning area in at least one scanning area corresponding to the target beam, and generate a correspondence between the at least one scanning area corresponding to the target beam and the transmission power.

Preferably, the obtaining unit is specifically configured to divide the satellite coverage area into at least one wave position corresponding to the target beam according to a preset wave position size corresponding to the target beam;

the processing unit is specifically configured to determine a distance between each wave position in the at least one wave position corresponding to the target beam and a satellite, and a scanning angle of the satellite corresponding to each wave position in the at least one wave position corresponding to the target beam;

the processing unit is further configured to determine a path loss and a scanning loss corresponding to each wave position according to a distance between each wave position and a satellite and a scanning angle of the satellite corresponding to each wave position;

the obtaining unit is further configured to obtain a terminal gain parameter corresponding to each wave position

The processing unit is further configured to determine a loss value corresponding to each wave position according to the terminal gain parameter corresponding to each wave position, and the path loss and the scanning loss corresponding to each wave position;

the processing unit is further configured to determine the transmit power corresponding to each wave position according to the total transmit power of the target beam and the loss value corresponding to each wave position, and generate a corresponding relationship between at least one wave position corresponding to the target beam and the transmit power.

Preferably, the obtaining unit is specifically configured to divide the satellite coverage area into at least one concentric ring corresponding to the target beam according to a size of a preset concentric ring corresponding to the target beam;

the processing unit is specifically configured to determine a distance between each concentric ring and a satellite in the at least one concentric ring corresponding to the target beam, and a satellite scanning angle corresponding to each concentric ring in the at least one first concentric ring corresponding to the target beam;

the processing unit is further configured to determine a path loss and a scanning loss corresponding to each concentric ring according to a distance between each concentric ring and a satellite scanning angle corresponding to each concentric ring;

the processing unit is further configured to determine a loss value corresponding to each concentric ring according to the path loss and the scanning loss corresponding to each concentric ring;

the processing unit is further configured to determine the transmit power corresponding to each concentric ring according to the total transmit power of the target beam and the loss value corresponding to each concentric ring, and generate a corresponding relationship between at least one concentric ring corresponding to the target beam and the transmit power.

Preferably, the obtaining unit is specifically configured to obtain, when the target beam includes a service beam, a region in which at least one user terminal in the satellite coverage area is located;

the processing unit is specifically configured to acquire a user communication parameter corresponding to each user terminal in the at least one user terminal;

the processing unit is further configured to determine, according to the information of the area where each user terminal of the at least one user terminal is located, a distance between each user terminal and a satellite, and a satellite scanning angle corresponding to each user terminal;

the processing unit is further configured to determine a path loss and a scanning loss of each user terminal according to a distance between each user terminal and a satellite scanning angle corresponding to each user terminal;

the processing unit is further configured to determine a loss value corresponding to each user terminal according to the user communication parameter, the path loss, and the scanning loss corresponding to each user terminal;

the processing unit is further configured to determine, according to the total transmission power of the target beam and the loss value corresponding to each user terminal, service beam transmission power corresponding to the area where each user terminal is located, and generate a correspondence between the area where at least one user terminal corresponding to the service beam is located and the transmission power.

Preferably, the obtaining unit is specifically configured to, when the target beam includes a service beam, divide the satellite coverage area into at least one parallel strip corresponding to the target beam according to a preset parallel strip size corresponding to the target beam;

the processing unit is specifically configured to determine a distance between each of the at least one parallel strip and a satellite, and a satellite scanning angle corresponding to each strip;

the processing unit is further configured to determine a path loss and a scanning loss corresponding to each of the at least one parallel stripe according to a distance between each of the at least one parallel stripe and a satellite scanning angle corresponding to each of the at least one parallel stripe;

the processing unit is further configured to determine a loss value corresponding to each of the stripes according to the path loss and the scanning loss corresponding to each of the stripes;

the processing unit is further configured to determine, according to the total transmission power of the target beam and the loss value corresponding to each band, the target beam transmission power corresponding to each band, and generate a correspondence between at least one band corresponding to the target beam and the transmission power.

Preferably, the obtaining unit is specifically configured to, when the target beam is a service beam, divide the satellite coverage area into at least one concentric ring corresponding to the target beam according to the size of the concentric ring corresponding to the target beam;

the processing unit is specifically configured to obtain a preset power distribution ratio parameter, and determine the preset power distribution ratio parameter as a power distribution ratio parameter of an outermost concentric ring of the at least one concentric ring;

the processing unit is further configured to determine, according to the power allocation proportion parameter of the outermost concentric ring and according to a preset rule, the power allocation proportion parameter of the concentric rings, except for the outermost concentric ring, in the at least one concentric ring; the preset rule comprises that in the at least one concentric ring, the power distribution proportion parameter of the concentric ring with the smaller outer ring radius is larger;

the processing unit is further configured to determine a transmit power corresponding to each concentric ring according to the total transmit power of the target beam and the power proportion distribution parameter of each concentric ring of the at least one concentric ring, and generate a corresponding relationship between the at least one concentric ring corresponding to the target beam and the transmit power.

Preferably, the processing unit is further configured to determine a beam to be used; the beam to be used comprises a signaling beam or a service beam;

the acquiring unit is specifically configured to acquire a corresponding relationship between a preset scanning area corresponding to the beam to be used and the transmission power;

the processing unit is specifically configured to determine, according to the target scanning area, a target transmission power corresponding to the target scanning area in a correspondence between a preset scanning area corresponding to the beam to be used and a transmission power;

the processing unit is specifically configured to scan and transmit signals to the target scanning area through the beam to be used according to the target transmission power.

Preferably, the processing unit is specifically configured to, when the beam to be used is a signaling beam, acquire at least one scanning area corresponding to the service beam; determining a target scanning area in at least one scanning area corresponding to the signaling beam according to a preset scanning sequence of at least one scanning area corresponding to the signaling beam;

or, the processing unit is further configured to determine location information of a target user terminal when the beam to be used is a service beam; acquiring at least one scanning area corresponding to the service beam; and determining a scanning area corresponding to the target user terminal in the scanning area corresponding to the service beam according to the position information of the target user terminal, and determining the scanning area as the target scanning area.

In a third aspect, an embodiment of the present application provides an electronic device, including:

a processor and a memory, the memory storing a computer program that, when executed, causes the electronic device to perform the method of any of the first aspects above.

In a fourth aspect, an embodiment of the present application provides a storage medium, where the storage medium includes a stored program, and when the program runs, a device in which the storage medium is located is controlled to execute the method of any one of the first aspects.

By adopting the scheme provided by the embodiment of the application, the method comprises the following steps: determining a target scanning area; acquiring a corresponding relation between a preset scanning area and transmitting power; according to the target scanning area, determining target transmitting power corresponding to the target scanning area in a preset corresponding relation between the scanning area and the transmitting power; and scanning the transmitting signal to the target scanning area according to the target transmitting power. That is, in the present application, the power control device may set in advance a correspondence relationship between the scanning area and the transmission power. When a satellite needs to transmit a signal, the power control device may first acquire a target scanning area and then acquire a corresponding relationship between a preset scanning area and transmission power. And according to the target scanning area, determining the transmitting power corresponding to the target scanning area in the preset corresponding relation between the scanning area and the transmitting power, namely the target transmitting power. After the target transmit power is determined, the transmit signal may be scanned directly at the target transmit power to the target scan area. Therefore, when the signal is transmitted, the power control device presets the corresponding relation between the scanning area and the transmitting power, so that the power control device can directly determine the target transmitting power corresponding to the target scanning area according to the preset corresponding relation between the scanning area and the transmitting power, the transmitting power of the satellite does not need to be continuously adjusted through complex closed-loop power control, and the power control process is simplified.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a power control method according to an embodiment of the present disclosure;

fig. 2 is a schematic flowchart of a power control method according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of another power control method according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a power control method according to an embodiment of the present disclosure;

fig. 5 is a schematic view of another power control method provided in an embodiment of the present application;

fig. 6 is a schematic view of a scenario of another power control method according to an embodiment of the present application;

fig. 7 is a schematic flowchart of another power control method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a power control apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Before specifically describing the embodiments of the present application, terms applied or likely to be applied to the embodiments of the present application will be explained first.

Power Spectral Density (PSD): in physics, a signal is typically represented in the form of a wave, such as an electromagnetic wave, random vibration, or acoustic wave. When the power spectral density of a wave is multiplied by an appropriate coefficient, the power carried by the wave per unit frequency is obtained, which is called the power spectral density of the signal. The unit of power spectral density is typically expressed in watts per hertz (W/Hz)

Traffic Beam (Traffic Beam Pattern): the application of specific amplitude and phase excitations to the smart antenna array results in a pattern with arbitrary beam pointing sweeps within the operating angular domain and with high gain narrow beams.

A phased array antenna: the directional pattern shape of the antenna is changed by controlling the feeding phase of the radiation elements in the array antenna. The control phase can change the direction of the maximum value of the antenna pattern so as to achieve the purpose of beam scanning.

The interstellar point is an intersection point of a connecting line between the earth center and the satellite on the earth surface and is represented by the geographic longitude and latitude. The ground point directly below the satellite is called the subsatellite point.

Wave position: the satellite service beam coverage angle is divided into a plurality of wave positions by taking a satellite as a center, and the wave position generally refers to a position covered by a certain angle in azimuth or elevation.

Spectral efficiency: the link spectral efficiency of a digital communication system is defined as the net bit rate (useful information rate, excluding error correction codes) or the maximum throughput divided by the bandwidth (in: hertz) of the communication channel or data link.

In recent years, low-earth-orbit satellite communication has the characteristics of small communication delay, global coverage and the like. In the process of data communication between the ground terminal equipment and the satellite, the transmission of uplink and downlink electromagnetic wave signals can pass through complex atmospheric channels such as a troposphere, a stratosphere, an ionosphere and the like and finally reach an opposite end. The uplink electromagnetic wave signal is a signal transmitted to the satellite by the ground terminal equipment, and the downlink electromagnetic wave signal is a signal transmitted to the ground terminal equipment by the satellite. If the satellite scans and transmits electromagnetic wave signals to the ground with fixed transmitting power, the strength of signals received by ground terminal equipment which is close to the satellite is high, the strength of signals received by ground terminal equipment which is far from the satellite is low, and even signals cannot be received, so that the communication experience of a far-end user is influenced. Therefore, it is necessary to perform transmission power control at the satellite end, and adjust the transmission power in time when scanning and transmitting electromagnetic wave signals at different transmission angles, so as to ensure the communication quality of all users.

In the related art, the satellite generally transmits signals with the aim of equalizing the power spectral density at the ground, wherein the power spectral density is the power carried by waves per unit frequency. That is, the satellite transmits signals while ensuring that the power spectral density of the electromagnetic waves received by each user terminal in its coverage area is equal. Based on the target, a closed-loop power control method is usually adopted for the satellite-side transmission power control. That is, the satellite scans and transmits electromagnetic wave signals to the ground with preset power, and the ground terminal equipment receives the electromagnetic wave signals and performs channel measurement to obtain channel measurement results such as power spectral density and loss value. Then, the channel measurement result is reported to the satellite, and the satellite adjusts the transmitting power according to the received channel measurement results of different ground terminal equipment, so as to ensure that the power spectral density of the electromagnetic wave signals received by each ground terminal equipment in the coverage area of the satellite is equal, thereby forming closed-loop control. For example, the satellite scans and transmits electromagnetic wave signals at different angles with preset power, and the ground terminal device a receives the electromagnetic wave signals and reports channel measurement results to the satellite. The satellite receives the channel measurement result of the ground terminal equipment A, and if the channel measurement result reported by the ground terminal equipment A indicates that the power spectral density is lower than a reference value, the satellite can increase the transmitting power when scanning the position of the ground terminal equipment A next time so as to ensure the communication quality of the ground terminal equipment A; if the channel measurement result reported by the ground terminal equipment a indicates that the power spectral density is higher than the reference value, the transmitting power of the satellite can be reduced when the satellite scans the position of the ground terminal equipment a next time, so as to save the transmitting power of the satellite. However, the closed-loop power control method is complex in process, when the satellite scans the transmission signals at different angles, the transmission power needs to be continuously adjusted according to the channel measurement results reported by different ground terminal devices, and the requirement on the power control capability of the satellite is high.

For example, as shown in fig. 1, the power adjustment apparatus disposed on the satellite is used to include a power coordination unit 101 and a satellite communication load unit 102, and it is assumed that the satellite communication load unit 102 is composed of 4 baseband processing modules 1021, 4 constant-gain frequency conversion modules 1022, and a phased array antenna 1023. The power coordination unit 101 is configured to determine a transmission power to be adjusted; the baseband processing module 1021 is configured to process data information to be sent, and convert the data information to be sent into a baseband signal; the constant-gain frequency conversion module 1022 is configured to perform power amplification and frequency conversion on the baseband signal, and convert the baseband signal into an intermediate frequency signal; the phased array antenna 1023 is used for amplifying the intermediate frequency signal and then transmitting the amplified signal. Since the gain of the constant-gain frequency conversion module 1022 is constant, that is, the power amplification factor of the constant-gain frequency conversion module 1022 on the baseband signal is constant, after determining the transmission power to be adjusted, the power coordination unit 101 determines the target output power of the baseband processing module 1021 according to the transmission power to be adjusted, the gain of the constant-gain frequency conversion module 1022, and the gain of the phased array antenna 1023, and then adjusts the relevant parameters of the baseband processing module 1021 to adjust the output power of the baseband processing module 1021 to the target output power, so that the phased array antenna 1023 transmits a signal to the target scanning area with the transmission power to be adjusted. For example, assuming that the transmission power to be adjusted determined by the power coordination unit 101 in the power adjustment device is 200W, the gain of the constant-gain frequency conversion module 1022 is 10dB, the corresponding power amplification factor is 10 times, the gain of the power amplifier in the phased-array antenna 1023 is 3dB, and the corresponding power amplification factor is 2 times, the power coordination unit 101 may determine that the target output power of the baseband processing module 1021 is 10W, and then control the output power of the baseband signal output by the baseband processing module 1021 to be 10W by adjusting the relevant parameters of the baseband processing module, and then after the power amplification action of the constant-gain frequency conversion module 1022 and the phased-array antenna 1023, the transmission power when the signal is transmitted by the phased-array antenna 1023 is the target transmission power 200W.

To solve the above problems, the present application provides a power control method, apparatus, device and storage medium. The method comprises the following steps: determining a target scanning area; acquiring a corresponding relation between a preset scanning area and transmitting power; according to the target scanning area, determining target transmitting power corresponding to the target scanning area in a preset corresponding relation between the scanning area and the transmitting power; and scanning the transmitting signal to the target scanning area according to the target transmitting power. That is, in the present application, the power control device may set in advance a correspondence relationship of the scanning area and the transmission power. When a satellite needs to transmit a signal, the power control device may first acquire a target scanning area and then acquire a corresponding relationship between a preset scanning area and transmission power. And according to the target scanning area, determining the transmitting power corresponding to the target scanning area in the preset corresponding relation between the scanning area and the transmitting power, namely the target transmitting power. After the target transmit power is determined, the transmit signal may be scanned directly at the target transmit power to the target scan area. Therefore, when the signal is transmitted, the power control device presets the corresponding relation between the scanning area and the transmitting power, so that the power control device can directly determine the target transmitting power corresponding to the target scanning area according to the preset corresponding relation between the scanning area and the transmitting power, the transmitting power of the satellite does not need to be continuously adjusted through complex closed-loop power control, and the power control process is simplified. The details will be described below.

Generally, a satellite periodically scans a coverage area thereof with a signaling beam to transmit a signaling signal, so that a user terminal in the coverage area returns related information of the user terminal to the satellite when receiving the signaling signal, so as to access the satellite communication system, and the satellite can subsequently provide communication service for the user terminal accessing the satellite communication system. The signaling signal usually carries ephemeris information of the satellite, i.e. information related to the orbit of the satellite. After the user terminal accesses the satellite communication system, data interaction can be performed between the satellite and the user terminal through the service beam, for example, the user terminal a needs to send a service data file to the user terminal B, at this time, the user terminal a initiates a data transmission request to the satellite by using the service beam, the data transmission request carries identification information and service data file information of the user terminal B, and the satellite sends the service data file carried in the data transmission request to the user terminal B after receiving the data transmission request initiated by the user terminal a. When a satellite scans and transmits a signaling signal to a coverage area of the satellite through a signaling beam or transmits a data file to a user terminal through a service beam, a power control device is needed to control the transmitting power of the satellite.

It should be noted that, in the embodiment of the present application, the power control device may be disposed on a satellite, and may also be disposed at a ground end, which is not limited in the present application. When the power control device is arranged on the satellite, the power control device can be directly connected with each processing module on the satellite to realize data interaction; when the power control device is arranged at the ground end, the power control device can realize data interaction with the satellite through a signaling beam or a service beam. For convenience of description, in the following embodiments, the power control device is disposed at the satellite side for example.

Fig. 2 is a power control method according to an embodiment of the present disclosure. The method is applied to a power control device and specifically comprises the following steps:

step S201, determining a target scanning area.

In the embodiment of the present application, when determining that the satellite needs to transmit a signal, the power control device needs to determine the target transmission power, and at this time, the target scanning area may be determined first. Since the satellite may transmit information such as ephemeris information to its coverage area through the signaling beam, and may transmit data to a certain user terminal through the service beam, in both cases, the method for determining the target scanning area by the power control apparatus is different. Assuming that a power control device divides a satellite coverage area into 400 scanning areas, the power control device presets a signaling beam scanning sequence of each scanning area according to the 400 scanning areas, and when the power control device determines that ephemeris information is sent to the coverage area of the power control device through a signaling beam, the power control device determines a next area to be scanned as a target scanning area according to the preset signaling beam scanning sequence of the 400 scanning areas; or, when determining to transmit data to a certain user terminal through the service beam, the power control device first obtains the location information of the user terminal, and then determines, according to the location information of the user terminal, a scanning area where the location of the user terminal is located in the preset 400 scanning areas, that is, the target scanning area.

Step S202, acquiring a corresponding relation between a preset scanning area and transmitting power.

Specifically, the power control device sets a plurality of scanning areas in advance according to the satellite coverage area, sets the transmission power corresponding to each scanning area, and establishes and stores the corresponding relationship between the scanning areas and the transmission power. That is, the power control device sets in advance the transmission power to be used when scanning the transmission signal to each scanning area. Then, after determining the target scanning area, the power control device may first obtain a corresponding relationship between the stored preset scanning area and the transmission power when the target transmission power needs to be further determined.

Step S203, according to the target scanning area, in the preset corresponding relation between the scanning area and the transmitting power, determining the target transmitting power corresponding to the target scanning area.

Specifically, after obtaining the corresponding relationship between the preset scanning area and the transmission power, the power control device may determine the transmission power corresponding to the target scanning area according to the target scanning area, that is, the target transmission power. For example, assuming that the target scanning area determined by the power control device is a scanning area a, and in the preset corresponding relationship between the scanning area and the transmission power, the transmission power corresponding to the scanning area a is transmission power B, then the power control device may determine that the target transmission power corresponding to the target scanning area is transmission power B.

And step S204, scanning and transmitting signals to the target scanning area according to the target transmitting power.

Specifically, after determining the target transmission power, the power control device may scan the transmission signal to the target scanning area at the target transmission power. For example, assuming that ephemeris information needs to be sent to a coverage area of the target scanning area through a signaling beam, after determining a target transmission power, the power control device adjusts the transmission power to a target transmission power, and transmits a signal to the target scanning area through the signaling beam at the target transmission power, where the signal carries satellite ephemeris information, so that a user in the target scanning area can receive the satellite ephemeris information through the signaling beam; or when determining that data is transmitted to a certain user terminal through the service beam, after determining the target transmission power, the power control device adjusts the transmission power to the target transmission power, and transmits a signal to the direction of the user terminal in the target scanning area through the service beam with the target transmission power, wherein the signal carries the data to be transmitted, so that the user terminal can receive the data to be transmitted through the service beam.

Fig. 3 is a power control method according to an embodiment of the present disclosure. Since the power control apparatus needs to preset the corresponding relationship between the scanning area and the transmission power, in the embodiment of the present application, the relevant steps of the power control apparatus for presetting the corresponding relationship between the scanning area and the transmission power are described in detail, as shown in fig. 3, which is specifically as follows.

Step S301, total transmitting power of the target beam is obtained.

Wherein the target beam comprises a signaling beam or a service beam.

Specifically, the power control device usually sends a signal to a satellite coverage area through a signaling beam, where the signal carries information such as satellite ephemeris information; the data file with large data volume and the like can be sent to the user terminal through the service beam according to the requirement of the user terminal, that is, the signal transmitted through the signaling beam is different from the signal transmitted through the service beam, so that the target scanning area is assumed to be the same, and the transmission power used for transmitting the signal through the signaling beam may be the same as or different from the transmission power used for transmitting the signal through the signaling beam. Thus, the power control device needs to set the corresponding relationship between the corresponding scanning area and the transmission power for the signaling beam and the service beam. When the corresponding relationship between the scanning area and the transmission power is preset, the total transmission power of the target beam can be obtained first. If the target beam is a signaling beam, the total transmission power of the signaling beam is obtained, and the power control device can preset the total transmission power of the signaling beam, so that the preset total transmission power of the signaling beam can be directly obtained at the moment. If the target beam is a service beam, the total transmitting power of the service beam needs to be obtained, and since the total transmitting power of the satellite is fixed and the total transmitting power of the satellite can be divided into the total transmitting power of the signaling beam and the total transmitting power of the service beam, when the total transmitting power of the signaling beam is determined, the remaining transmitting power of the total transmitting power of the satellite except the total transmitting power of the signaling beam is the total transmitting power of the service beam. That is, when the target beam is the service beam, the power control device may obtain the preset total transmission power of the signaling beam and the preset total transmission power of the satellite, so as to determine the total transmission power of the service beam.

It should be noted that the total transmission power of the signaling beam may be set according to actual requirements, and the application is not limited to this.

Step S302, a satellite coverage area is obtained, and the satellite coverage area is divided into at least one scanning area corresponding to the target beam according to the size of a preset scanning area.

Specifically, after determining the total transmission power of the target beam, the power control device may obtain a coverage area of the satellite, and divide the coverage area of the satellite into at least one scanning area corresponding to the target beam by taking the sub-satellite point as a center according to the size of a preset scanning area corresponding to the target beam. The intersatellite point is an intersection point of a connecting line of the earth center and the satellite on the earth surface and is expressed by a geographical longitude and a latitude. The ground point directly below the satellite is called the sub-satellite point. When the target wave beam is a signaling wave beam, the power control device divides a satellite coverage area into at least one scanning area corresponding to the signaling wave beam according to the size of a preset scanning area; when the target beam is a service beam, the power control device may divide the satellite coverage area into at least one scanning area corresponding to the signaling beam according to the size of the preset scanning area.

As a possible implementation manner, the presetting of the size of the scanning area includes: the size of a preset scanning area corresponding to the signaling beam or the size of a preset scanning area corresponding to the service beam.

Specifically, the target beam includes a signaling beam or a service beam, and for different target beams, the size of the preset scanning area corresponding to the signaling beam and the size of the preset scanning area corresponding to the service beam may be set according to actual requirements.

As a possible implementation manner, the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the size of the preset scanning area corresponding to the target beam includes:

and dividing the satellite coverage area into at least one wave position corresponding to the target wave beam according to the preset wave position size corresponding to the target wave beam.

Specifically, since the satellite coverage area is large, if the corresponding transmission power is set for each user terminal in the satellite coverage area, the requirement on the control flexibility of the power control device is high, and the design difficulty of the satellite is also large. Therefore, the satellite coverage area can be divided into at least one wave position according to the preset wave position size corresponding to the target wave beam, and corresponding transmitting power is set for each wave position, so that the same transmitting power is adopted for transmitting signals for different user terminals in the same wave position. For example, assuming that the satellite coverage area is a square area as shown in fig. 4, and assuming that the preset scanning area size is a circular wave position with a radius of 5km, the satellite coverage area is divided into 12 × 12 wave positions according to the preset scanning area size, so that the power control device only needs to set the corresponding transmission power for each wave position.

and dividing the satellite coverage area into at least one concentric ring corresponding to the target beam according to the size of the preset concentric ring corresponding to the target beam.

Specifically, to further simplify the power control procedure, the power control apparatus may further enlarge the size of the preset scanning area, divide the satellite coverage area into at least one concentric ring corresponding to the target beam, and then set the corresponding transmission power for each concentric ring. That is, since the distances between the user terminals and the satellite in the same concentric ring are approximately equal and the loss during signal transmission is also approximately equal with the sub-satellite point as the center, it can be considered that the same transmission power is used to transmit signals to the user terminals, and then the power control device may set the corresponding transmission power for each concentric ring. For example, assuming that the satellite coverage area is still a square area as shown in fig. 4, assuming that the ring width of the preset concentric ring is 10km, the satellite coverage area is divided into 6 concentric rings according to the size of the preset concentric ring, as shown in fig. 5, wherein the outermost concentric ring is indicated by a dotted line in fig. 5, the second outer concentric ring is indicated by a solid line, and so on. The power control device will then set the corresponding transmission power for each concentric ring, that is, based on the embodiment shown in fig. 4, the corresponding transmission power is not set for each wave bit, but set for each concentric ring, so that the transmission power for any two different wave bits in the same concentric ring is the same, and if signals are transmitted to two wave bits in the same concentric ring, the adjustment of the transmission power will not be needed.

It should be noted that, when the target beam is a signaling beam, the preset scanning area corresponding to the signaling beam may be a wave position or a concentric ring; when the target beam is a service beam, the preset scanning area corresponding to the service beam may be a wave position or a concentric ring. In addition, the size of the preset wave bits corresponding to the signaling beam may be the same as or different from the size of the preset wave bits corresponding to the service beam, and the size of the preset concentric ring corresponding to the signaling beam may be the same as or different from the size of the preset concentric ring corresponding to the service beam, which is not limited in this application.

and when the target beam comprises the service beam, acquiring the area of at least one user terminal in the coverage area of the satellite.

Specifically, when the target beam is a service beam, each ue has a different configuration and a different location, so that the corresponding transmit power may be set for each ue to ensure the communication quality of each ue and improve the accuracy of power control. At this time, the power control device may regard the area of each user terminal as a scanning area, and acquire the area of at least one user terminal in the satellite coverage area. For example, the power control device may send a broadcast message to a satellite coverage area through a signaling beam, where the broadcast message carries ephemeris information of a satellite, and at least one user terminal in the satellite coverage area returns relevant information of the user terminal to the power control device after receiving the ephemeris information of the satellite, where the user terminal information at least includes terminal location information, terminal gain parameter information, and the like. The power control device may record location information of at least one ue, and determine an area within a preset range of a location of the ue as the area of the ue. In this way, the power control device can determine the area in which the at least one user terminal is located.

when the target beam comprises a service beam, dividing the satellite coverage area into at least one parallel strip corresponding to the target beam according to the size of a preset parallel strip corresponding to the target beam.

Specifically, when the target beam includes a service beam, the satellite coverage area may be further divided into at least one parallel strip corresponding to the service beam according to a preset parallel strip size corresponding to the service beam. For example, as shown in fig. 6, the satellite coverage area is still square as shown in fig. 4, and is divided into 12 × 12 wave bits, each of which has a radius of 5km, and assuming that the width of the preset parallel stripe size is 20km, that is, each 2 traveling wave bits can be regarded as one parallel stripe, then as shown in fig. 6, the satellite coverage area is divided into 6 parallel stripes, wherein the first traveling wave bit and the second traveling wave bit are shown by dotted lines and are the first parallel stripe; the second traveling wave position and the second traveling wave position are shown by solid lines as the second parallel strip, and so on for a total of 6 parallel strips. Then, the power control device may set the corresponding transmission power for each parallel stripe, and does not set the corresponding transmission power for each wave position any more, so that the complexity of power control may be reduced, and power adjustment may not be necessary when scanning the transmission signal to different positions of the same parallel stripe.

Step S303, determining the transmission power corresponding to each scanning area in the at least one scanning area corresponding to the target beam according to the total transmission power of the target beam, and generating a corresponding relationship between the at least one scanning area corresponding to the target beam and the transmission power.

Specifically, after determining the total transmission power of the target beam and the at least one scanning area corresponding to the target beam, the power control device may set the transmission power corresponding to each scanning area. Generally, there are two targets for power control, one of which takes the equal ground power spectral density as a control target, that is, it is ensured that the received power of the user terminal in each scanning area is equal, and the user experience is consistent, the corresponding transmission power is set to be larger for the scanning area with larger power loss in the signal transmission process, and the corresponding transmission power is set to be smaller for the scanning area with smaller power loss in the signal transmission process, so as to achieve the equal ground power spectral density control target. The other method is that the maximum satellite capacity is a power control target, the power loss in the signal transmission process is reduced as much as possible, the utilization rate of the transmitting power is improved, and aiming at a scanning area far away from the satellite, the power loss in the signal transmission process is too large, so that the minimum communication quality of a user terminal in the scanning area is only ensured, and the corresponding transmitting power is set to be smaller; for a scanning area close to the satellite, the corresponding transmitting power can be set to be larger because the signal transmission path is relatively short, the scanning angle of the satellite is small, and the corresponding power loss is small.

For example, taking the target beam as the signaling beam as an example, since the ue in the coverage area of the satellite can only return the ue information corresponding to the ue to the satellite when receiving the message such as ephemeris information sent by the user through the signaling beam, the power control apparatus needs to ensure that the ues in the coverage area of the satellite can all receive the signal transmitted by the satellite through the signaling beam, that is, the power control aims at the equal ground power spectral density. Therefore, when transmitting a signal to an area relatively far away from the satellite, the transmission power to be used should be relatively large because the transmission path of the signal is relatively long and the scanning angle of the satellite is large, resulting in relatively large power loss; when transmitting signals to an area relatively close to the satellite, the transmission path of the signals is relatively short, and the scanning angle of the satellite is small, so that relatively small transmission power can be adopted to save transmission power. In this way, with the equal received power of the ue in each scanning area as the power control target, the corresponding transmission power is set to be the maximum for the scanning area farthest from the satellite, and the transmission power corresponding to the scanning area is set to be correspondingly reduced as the distance between the scanning area and the satellite is shortened, that is, the transmission power corresponding to the scanning area is in direct proportion to the distance between the scanning area and the satellite, and the power loss in the corresponding transmission process is larger as the distance between the scanning area and the satellite is longer and the scanning angle of the satellite is larger, so the transmission power corresponding to the scanning area is larger. At this time, the power control device determines a power allocation ratio for each scanning area according to a distance between each scanning area and the satellite and a scanning angle of the satellite corresponding to each scanning area, and then allocates the total transmission power of the target beam to at least one scanning area according to the power allocation ratio for at least one scanning area. The details are as follows.

As a possible implementation manner, when a satellite coverage area is divided into at least one wave position corresponding to a target beam, determining, according to a total transmission power of the target beam, a transmission power corresponding to each scanning area in at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

determining the distance between each wave position in at least one wave position corresponding to the target wave beam and the satellite and the scanning angle of the satellite corresponding to each wave position in at least one wave position corresponding to the target wave beam;

obtaining the terminal gain parameter corresponding to each wave position

Specifically, when the power control device divides the satellite coverage area into at least one wave position, the power control device needs to determine a distance between each wave position of the at least one wave position corresponding to the target beam and the satellite, and a scanning angle of the satellite. First, the power control device may determine position information of a satellite, then determine position information of a central point of each wave position, and then determine a distance between the central point of each wave position and the satellite according to the position information of the satellite and the position information of the central point of each wave position, that is, the distance between the wave position and the satellite; then, an included angle between a connection line of the central points of the satellite and the wave position and a satellite reference scanning direction is determined, that is, a satellite scanning angle corresponding to the wave position, where the reference scanning direction is a direction of a beam when a signal is transmitted directly below the satellite, for example, a normal direction of a transmitting antenna of the satellite.

Further, the path loss and the scanning loss corresponding to the wave position can be determined. The path loss is power loss formed in the transmission process of the signal when the signal is transmitted to the wave position through the target wave beam; the scanning loss is the power loss caused by the deviation of the scanning angle of the target beam from the reference scanning direction when the target beam transmits a signal to the wave position. For example, the path loss Los corresponding to each wave bit can be determined according to the following formula (1) ₁ Wherein, L is the distance between the wave position and the satellite; determining the scanning loss Los corresponding to each wave position according to the following formula (2) ₂ And theta is the satellite scanning angle corresponding to the wave position.

Los ₁ ＝10×log ₁₀ (L ² ) (1)

Los ₂ ＝-10×log ₁₀ (cosdθ ² ) (2)

Moreover, since the user terminal amplifies the signal according to the terminal gain parameter when receiving the signal, that is, the terminal gain parameter of the user terminal affects the receiving power of the user terminal, where the terminal gain parameter is the power amplification factor, the power control device also needs to consider the terminal gain parameter of the user terminal in each wave position when setting the transmitting power corresponding to each wave position. However, there may be multiple ues in each wave position, and the terminal gain parameter of each ue may be the same or different, and for convenience of calculation, the power control apparatus may set the terminal gain corresponding to each wave position to the value of the minimum terminal gain parameter, for example, 0dBi, or may be other values, which is not limited in this application. Therefore, after determining the path loss and the scanning loss corresponding to each wave position, the power control apparatus may obtain a preset terminal gain parameter, and regard the terminal gain parameter corresponding to each wave position as the preset terminal gain parameter.

Then, the power control device may determine a loss value of each wave bit in the at least one wave bit according to the terminal gain parameter, the path loss, and the scanning loss corresponding to each wave bit. At this time, the power control device may first obtain a preset reference gain and a reference path loss. The value of the reference gain is set as the maximum terminal gain parameter, and may be, for example, 2.5dBi, or may be other values. The reference path loss is the minimum value of the path loss, and since the distance between the satellite and the satellite is the shortest in the coverage area of the satellite, the path loss is the smallest when the signal is transmitted to the satellite, and therefore the path loss corresponding to the satellite can be determined as the reference path loss.

And then, for each wave position, determining a terminal gain reduction value and a path loss increase value corresponding to the wave position according to preset reference gain and reference path loss, a terminal gain parameter corresponding to the wave position and path loss. The terminal gain reduction value corresponding to the wave position is a reduction value of the terminal gain corresponding to the wave position relative to the reference gain, and the path loss increase value corresponding to the wave position is an increase value of the path loss corresponding to the wave position relative to the reference path loss. For example, the terminal gain drop value corresponding to the wave position is determined according to the following formula (3), where Δ Los _G Represents a terminal gain reduction value, G ₀ Representing a reference gain, G representing a terminal gain parameter corresponding to the wave position; determining the path loss increase value delta Los corresponding to the wave position according to the following formula (4) ₁ ，Los ₁ Indicates the path loss value, los, corresponding to the wave position ₀ Represents a reference path loss value, L ₀ Representing the distance between the sub-satellite point and the satellite.

ΔLos _G ＝|G ₀ -G| (3)

ΔLos ₁ ＝|Los ₁ -Los ₀ |＝|10×log ₁₀ (L ² )-10×log ₁₀ (L ₀ ² )| (4)

After determining the terminal gain drop value and the loss increase value corresponding to the wave position, determining the loss value corresponding to the wave position according to the terminal gain drop value, the path loss increase value and the scanning loss corresponding to the wave position and the following formula (5).

Los _{General assembly} ＝ΔLos _G +ΔLos ₁ +|Los ₂ | (5)

After the loss value corresponding to each wave position is determined, the power distribution proportion corresponding to each wave position in at least one wave position is determined according to the ratio of the loss values corresponding to each wave position in at least one wave position, and the transmitting power corresponding to each wave position is determined according to the total transmitting power of the target wave beam and the power distribution proportion corresponding to each wave position in at least one wave position. That is, the larger the loss value corresponding to a certain wave position is, the larger the power distribution ratio corresponding to the certain wave position is, and the larger the determined transmission power corresponding to the wave position is. For example, assuming that the total power of a target beam is 24W, a satellite coverage area is divided into 4 wave bits, loss values of the 4 wave bits are determined to be 12, 18, 6, and 12, respectively, and then a power allocation ratio for the 4 wave bits is 2.

As a possible implementation manner, when a satellite coverage area is divided into at least one concentric ring corresponding to a target wave location, determining, according to a total transmission power of a target beam, a transmission power corresponding to each scanning area in at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

determining the distance between each concentric ring in the at least one concentric ring corresponding to the target beam and the satellite scanning angle corresponding to each concentric ring in the at least one first concentric ring corresponding to the target beam;

Specifically, when the power control device divides the coverage area of the satellite into at least one concentric ring, the power control device needs to determine the distance between each concentric ring in the at least one concentric ring corresponding to the target beam and the satellite, and the scanning angle of the satellite. First, the power control device may determine the position information of the satellite, and then determine the position information of the intersection of the radius and each concentric ring by using the center of the concentric ring as a starting point and making a radius in any direction. Then, for each concentric ring, determining the distance between the intersection point and the satellite according to the position information of the satellite and the position information of the intersection point of the concentric ring and the radius, namely the distance between the concentric ring and the satellite; then, a connection line between the satellite and any point on the center line of the concentric ring and a satellite reference scanning direction are determined, and an included angle between the connection line and the reference scanning direction is determined as a satellite scanning angle corresponding to the concentric ring, wherein the reference scanning direction is a pointing direction of a beam when a signal is transmitted to a position right below the satellite, and may be a normal direction of a transmitting antenna of the satellite, for example.

Further, the path loss and scan loss corresponding to the concentric rings may be determined. The path loss is power loss formed in the transmission process of signals when the signals are transmitted to the concentric rings through target beams; the scan loss is the power loss caused by the scan angle of the target beam deviating from the reference scan direction when transmitting signals through the target beam to the concentric rings. Los path loss of the concentric ring ₁ Los scanning loss ₂ Specific formula of calculationReference may be made to equations (6) and (7), where L is a distance between the concentric ring and the satellite, and θ is a satellite scanning angle corresponding to the concentric ring.

Los ₁ ＝10×log ₁₀ (L ² ) (6)

Los ₂ ＝-10×log ₁₀ (cosdθ ² ) (7)

The power control device may then determine a loss value for each of the at least one concentric ring based on the path loss and the scan loss for each concentric ring. For example, the power control device may first obtain a preset reference path loss and a preset reference scanning loss. Since the distance between the satellite and the sub-satellite point is the shortest in the coverage area of the satellite, when a signal is transmitted to the sub-satellite point, the path loss is the smallest and the scanning loss is the smallest, so that the power control device can determine the path loss corresponding to the sub-satellite point as the reference path loss and determine the scanning loss corresponding to the sub-satellite point as the reference scanning loss. Then, for each concentric ring, determining a path loss increase value corresponding to the concentric ring according to a preset reference path loss and a path loss corresponding to the concentric ring; and determining the scanning loss increase value corresponding to the concentric ring according to the preset reference scanning loss and the scanning loss corresponding to the concentric ring. The path loss increment value corresponding to the concentric ring is the increment value of the path loss corresponding to the concentric ring and the reference path loss, and the scan loss increment value corresponding to the concentric ring is the increment value of the path loss corresponding to the concentric ring relative to the reference scan loss. And then determining the loss value corresponding to the concentric ring according to the path loss increment value and the scanning loss increment value corresponding to the concentric ring. For example, the pathloss increase Δ Los for the concentric rings is determined according to equation (8) ₁ At this time, los ₁ Indicates the corresponding path loss value, los, of the concentric rings ₀ Represents a reference path loss value, L ₀ Representing the distance between the subsatellite point and the satellite; determining the scan loss increase value corresponding to the concentric ring according to the formula (9), wherein Los ₂ Represents the scan loss value, los' ₀ Representing a reference scan loss value，θ ₀ Representing the satellite scanning angle corresponding to the sub-satellite point; according to equation (10), the sum of the path loss increase value corresponding to the concentric ring and the scan loss increase value corresponding to the concentric ring is determined as the loss value corresponding to the concentric ring.

ΔLos ₁ ＝|Los ₁ -Los ₀ |＝|10×log ₁₀ (L ² )-10×log ₁₀ (L ₀ ² )| (8)

Los _{General (1)} ＝ΔLos ₁ +ΔLos ₂ (10)

After the loss value corresponding to each concentric ring is determined, the power distribution proportion corresponding to each concentric ring in the at least one concentric ring is determined according to the ratio of the loss values corresponding to each concentric ring in the at least one concentric ring, and the transmission power corresponding to each concentric ring is determined according to the total transmission power of the target beam and the power distribution proportion corresponding to each concentric ring in the at least one concentric ring. That is, the larger the loss value corresponding to a certain concentric ring is, the larger the power allocation ratio corresponding to the concentric ring is, and the larger the transmission power corresponding to the concentric ring is determined to be. Therefore, only the corresponding transmitting power needs to be set for each concentric ring, and when the power control device transmits signals to different user terminals in the same concentric ring, the adopted transmitting power is the same, adjustment is not needed, and the process of power control is simplified.

As a possible implementation manner, assuming that the target wave bits are service wave bits, when the satellite coverage area is divided into at least one concentric ring corresponding to the target wave bits, the target may be controlled with the maximum satellite capacity, that is, to improve the utilization rate of the satellite transmission power and reduce the power loss, because when the signals are transmitted to the near-end user terminal and the far-end user terminal respectively with the same transmission power, the signal transmission distance is longer when the signals are transmitted to the far-end user terminal, the satellite scanning angle is larger, the corresponding power loss is also larger, and in a relatively short term, the power loss is smaller when the signals are transmitted to the near-end user terminal, when the signals are transmitted to the far-end user terminal, the signals are transmitted with the minimum transmission power capable of ensuring the basic communication quality of the user terminal, and more transmission power is applied to the data interaction with the near-end user terminal. That is, the closer the scanning area is to the satellite, the higher its corresponding transmission power can be set by the power control means. Based on this, when the target beam is a service beam, assuming that the power control device divides the satellite coverage area into at least one concentric ring corresponding to the service beam, then determining, according to the total transmission power of the target beam, the transmission power corresponding to each of at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

acquiring a preset power distribution proportion parameter, and determining the preset power distribution proportion parameter as the power distribution proportion parameter of the outermost concentric ring in at least one concentric ring;

according to the power distribution ratio parameter of the outermost concentric ring, determining the power distribution ratio parameter of the concentric rings except for the outermost concentric ring in at least one concentric ring according to a preset rule; the preset rule comprises at least one concentric ring, wherein the power distribution ratio parameter of the concentric ring with the smaller radius of the outer ring is larger;

and determining the transmitting power corresponding to each concentric ring according to the total transmitting power of the target beam and the power proportion distribution parameter of each concentric ring in the at least one concentric ring, and generating the corresponding relation between the at least one concentric ring corresponding to the target beam and the transmitting power.

Specifically, when the maximum satellite capacity is guaranteed as the power control target, the power control device may determine, in advance, a satellite scanning angle at which the user terminal farthest from the satellite transmits a signal according to a coverage area of the satellite, and set a minimum transmission power usable when the signal is transmitted at the scanning angle, that is, a preset power distribution ratio parameter, which may be preset according to an actual requirement, which is not limited in this application. At least one is arrangedWhen the transmitting power corresponding to the concentric rings is received, the power control device may obtain a preset power allocation proportion parameter, and because the distance between the user terminal in the outermost concentric ring and the satellite is the farthest, the obtained preset power allocation proportion parameter may be determined as the power allocation proportion parameter of the outermost concentric ring in the at least one concentric ring. And then, according to the power distribution proportion parameter of the outermost circle of concentric rings, determining the power distribution proportion parameter of the concentric rings except for the outermost circle of concentric rings in at least one concentric ring according to a preset rule. The preset rule includes at least one concentric ring, the smaller the radius of the outer ring is, the larger the power distribution ratio parameter is, and the preset rule can be set according to actual requirements, which is not limited in the present application. After the power allocation ratio parameter corresponding to each concentric ring in the at least one concentric ring is determined, the transmit power corresponding to each concentric ring may be determined according to a ratio between the total transmit power of the service beam and the power allocation ratio parameter of the at least one concentric ring. For example, assuming that the power control device preset a preset power allocation proportion parameter of 5W, when the target beam is a service beam, the power control device divides the satellite coverage area into 4 concentric rings corresponding to the service beam according to the size of a preset scanning area corresponding to the service beam, and then the power allocation proportion parameter corresponding to the first concentric ring (the outermost concentric ring) is the preset power allocation proportion parameter of 5W. Assuming that the satellite scanning angle corresponding to the first concentric ring (the outermost concentric ring) is 40 °, for the convenience of calculation, the satellite scanning angle corresponding to each concentric ring is not determined according to the position of each concentric ring, and the power control device presets that the satellite scanning angles of each two concentric rings are different by 5 °. Assume that the preset rules set by the power control device are: the power distribution proportion parameter corresponding to the nth concentric ring is as follows: y is _n ＝2*(θ ₁ +(n-1)*Δθ)+b

Wherein, y _n Representing the power division ratio parameter, theta, of the n-th concentric ring ₁ The scanning angle corresponding to the 1 st concentric ring (the outermost concentric ring) is shown, delta theta represents the difference between the scanning angles of the satellites corresponding to the two adjacent concentric rings, b is a constant, and n is a positive integer.In this example, since the first concentric ring (the outermost concentric ring) corresponds to a scanning angle of 40 degrees and the corresponding power division ratio parameter is 5W, θ ₁ Is 40 °, Δ θ is 10 °, and according to the power division ratio parameter of the first concentric ring: 2 theta ₁ + b =5, it can be determined that the value of the constant b is-75, then the ratio of the power division ratio parameters between the 4 concentric rings can be determined as 5. Assuming that the total transmission power is 80W, according to the ratio 1 of the power distribution ratio parameters among the 4 concentric rings.

It should be noted that the preset rule in the foregoing example is only an example, and the preset rule may also be set according to an actual requirement, which is not limited in this application. For example, the power distribution ratio parameters of the n concentric rings are increased in an exponential manner, and the power control device sets the power distribution ratio parameter corresponding to the nth concentric ring as follows: y is _n ＝e ^{(θ+(n-1)*Δθ)} + b. Wherein theta represents the scanning angle corresponding to the outermost concentric ring, delta theta represents the difference value between the satellite scanning angles corresponding to the two adjacent concentric rings, b is a constant, and n is a positive integer.

That is, according to the above method, for the far-end concentric ring farthest from the satellite, the corresponding transmission power is determined to be the minimum, and the closer the concentric ring is to the satellite, the determined corresponding transmission power is increased according to the preset rule. Thus, the power control device can apply more transmitting power to the communication with the near-end user terminal, and simultaneously ensure the basic communication quality of the far-end user terminal, thereby realizing the power control target of the maximum satellite capacity.

As a possible implementation manner, assuming that the target beam includes a service beam, when a satellite coverage area is divided into at least one parallel band corresponding to a target wave position, determining, according to a total transmission power of the target beam, a transmission power corresponding to each scanning area in at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

determining path loss and scanning loss corresponding to each strip according to the distance between each strip in at least one parallel strip and a satellite and the satellite scanning angle corresponding to each strip;

Specifically, assuming that the target beam is a service beam, when the power control device divides the satellite coverage area into at least one parallel strip corresponding to the service beam according to the size of a preset parallel strip corresponding to the service beam, the power control device needs to determine the distance between each parallel strip of the at least one parallel strip corresponding to the service beam and the satellite, and the scanning angle of the satellite. First, the power control device may determine position information of a satellite, and then determine position information of an intersection point of a straight line perpendicular to each parallel strip by using a sub-satellite point as a reference point and a center line of each parallel strip. For each parallel strip, according to the position information of the satellite and the position information of the intersection point of the center line of the parallel strip and the straight line, determining the distance between the intersection point and the satellite, that is, the distance between the parallel strip and the satellite, then determining the connection line between the intersection point and the satellite reference scanning direction, and determining the included angle between the connection line and the reference scanning direction as the satellite scanning angle corresponding to the parallel strip, wherein the reference scanning direction is the direction of the beam when the signal is transmitted to the right below the satellite, for example, the reference scanning direction may be the normal direction of the transmitting antenna of the satellite.

Further, the path loss and the scan loss corresponding to the parallel strips can be determined. Wherein the path loss is in the direction of the parallel through the target beamWhen the strip transmits signals, the power loss of the signals is formed in the transmission process; the scan loss is power loss caused by the fact that the scan angle of the target beam deviates from the reference scan direction when the signal is transmitted to the parallel strip through the target beam. For example, the path loss Los corresponding to each parallel stripe can be determined according to the following formula (11) ₁ Wherein, L is the distance between the parallel strip and the satellite; determining the scanning loss Los corresponding to each parallel strip according to the following formula (12) ₂ And theta is the satellite scanning angle corresponding to the parallel strip.

Los ₁ ＝10×log ₁₀ (L ² ) (11)

Los ₂ ＝-10×log ₁₀ (cosdθ ² ) (12)

The power control device may then determine a loss value for each of the at least one parallel strips based on the path loss and the scan loss corresponding to each parallel strip. For example, the power control device may first obtain a preset reference path loss and a preset reference scanning loss. In the coverage area of the satellite, the distance between the satellite and the satellite is the shortest, so that when a signal is transmitted to the satellite, the path loss is the smallest and the scanning loss is the smallest, and therefore the power control device can determine the path loss corresponding to the satellite as the reference path loss and determine the scanning loss corresponding to the satellite as the reference scanning loss. Then, for each parallel strip, determining a path loss increase value corresponding to the parallel strip according to a preset reference path loss and a path loss corresponding to the parallel strip; and determining the scanning loss increase value corresponding to the parallel strip according to the preset reference scanning loss and the scanning loss corresponding to the parallel strip. The path loss increment corresponding to the parallel stripe is the increment of the path loss corresponding to the parallel stripe and the reference path loss, and the scan loss increment corresponding to the parallel stripe is the increment of the path loss corresponding to the parallel stripe relative to the reference scan loss. And then determining the loss value corresponding to the parallel strip according to the path loss increment value and the scanning loss increment value corresponding to the parallel strip. For example, inThe path loss increase Δ Los corresponding to the parallel strip can be determined according to the formula (13) ₁ Wherein, los ₁ Represents the corresponding path loss value, los, of the parallel strip ₀ Represents a reference path loss value, L ₀ Representing the distance between the subsatellite point and the satellite; determining the scan loss increase value corresponding to the parallel stripe according to the formula (14), wherein Los ₂ Represents a scan loss value, los 'corresponding to the parallel bands' ₀ Representing a reference scan loss value, θ ₀ Representing the satellite scanning angle corresponding to the sub-satellite point; and then determining the sum of the path loss increase value corresponding to the parallel strip and the scanning loss increase value corresponding to the parallel strip as the loss value corresponding to the parallel strip according to the formula (15).

ΔLos ₁ ＝|Los ₁ -Los ₀ |＝|10×log ₁₀ (L ² )-10×log ₁₀ (L ₀ ² )| (13)

Los _{General assembly} ＝ΔLos ₁ +ΔLos ₂ (15)

After determining the loss value corresponding to each parallel stripe, determining the power distribution proportion corresponding to each parallel stripe in at least one parallel stripe according to the ratio of the loss values corresponding to each parallel stripe in at least one parallel stripe, and determining the transmission power corresponding to each parallel stripe according to the total transmission power of the target beam and the power distribution proportion corresponding to each parallel stripe in at least one parallel stripe. That is to say, the larger the loss value corresponding to a certain parallel strip is, the larger the power distribution ratio corresponding to the certain parallel strip is, and the larger the determined transmission power corresponding to the parallel strip is. Therefore, only by setting the corresponding transmitting power for each parallel strip, when the power control device transmits signals to different user terminals in the same parallel strip, the adopted transmitting power is the same, adjustment is not needed, and the process of power control is simplified.

As a possible implementation manner, when at least one scanning area corresponding to a target beam includes an area where at least one user terminal in a satellite coverage area is located, determining, according to a total transmission power of the target beam, a transmission power corresponding to each scanning area in the at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

acquiring a user communication parameter corresponding to each user terminal in at least one user terminal;

determining the distance between each user terminal and a satellite and the satellite scanning angle corresponding to each user terminal according to the information of the area where each user terminal in at least one user terminal is located;

determining the path loss and the scanning loss of each user terminal according to the distance between each user terminal and the satellite scanning angle corresponding to each user terminal;

As a possible implementation manner, the user communication parameter of each ue includes a terminal gain parameter or a terminal-specific loss parameter corresponding to each ue.

Specifically, the positions of any two user terminals located in the same scanning area may be far apart, and the terminal gain parameters may also be different, if the power control device respectively transmits the same signal to the two user terminals in the same scanning area using the same transmission power, and because the transmission path distance of the signal, the satellite scanning angle, and the terminal gain of the user terminal are also different, the reception powers of the two user terminals may also be different, therefore, in order to more accurately allocate the total power of the target beam, the power control device may obtain the area where at least one user terminal is located in the satellite coverage area, and determine the transmission power corresponding to the area where each user terminal is located with respect to the related information of each user. Since the terminal gain of the ue determines the power amplification factor of the ue when receiving the signal, and an obstacle in the environment where the ue is located may also affect the reception of the signal by the ue, resulting in a certain power loss, the power control apparatus may first obtain the user communication parameters corresponding to each ue in at least one ue when determining the transmit power corresponding to the area where each ue is located. The user communication parameter is terminal gain parameter information or terminal specific loss parameter. When the user communication parameter is the terminal gain parameter, since the at least one user terminal in the satellite coverage area returns the respective user terminal information to the power control apparatus when the area where the at least one user terminal is located in the satellite coverage area is obtained in step S202, where the user terminal information includes the terminal gain parameter information corresponding to the user terminal, the power control apparatus may obtain the terminal gain parameter information corresponding to each user terminal from the received user related information of the at least one user terminal. When the user communication parameter is the terminal-specific loss parameter, since the power control device sends the broadcast message to the satellite coverage area by the signaling multiple when the location information of at least one user terminal is obtained in step S202, after receiving the broadcast message, at least one user terminal in the satellite coverage area returns the relevant information of the user terminal to the power control device, and at least one user terminal may also determine the transmission power and the reception power of the user terminal, perform channel measurement and generate a channel measurement result, where the channel measurement result at least includes the terminal-specific loss parameter. The at least one user terminal returns a channel measurement result to the power control device, the power control device receives the channel measurement result of the at least one user terminal, and the terminal-specific loss parameter corresponding to each user terminal in the at least one user terminal can be obtained through the channel measurement result of the at least one user terminal. Then, the power control device may determine the location information of the satellite, and determine, for the area where each user terminal is located, a distance between each user terminal and the satellite according to the location information of the user terminal and the location information of the satellite; then, an included angle between a connection line of the satellite and the central point of the area where the user terminal is located and a satellite reference scanning direction is determined, that is, a satellite scanning angle corresponding to the user terminal, where the reference scanning direction is a direction of a beam when a signal is transmitted directly below the satellite, and may be, for example, a normal direction of a transmitting antenna of the satellite.

Further, the path loss and the scanning loss corresponding to the ue may be determined. The path loss is power loss formed in the transmission process of a signal when the signal is transmitted to the area where the user terminal is located through a target beam; the scanning loss is power loss caused by deviation of a scanning angle of the target beam from a reference scanning direction when the target beam transmits a signal to the area where the user terminal is located. For example, the path loss Los corresponding to each user terminal can be determined according to the following formula (16) ₁ Wherein, L is the distance between the user terminal and the satellite; determining the scanning loss Los corresponding to each user terminal according to the following formula (17) ₂ And θ is a satellite scanning angle corresponding to the user terminal.

Los ₁ ＝10×log ₁₀ (L ² ) (16)

Los ₂ ＝-10×log ₁₀ (cosdθ ² ) (17)

Then, the power control device may determine a loss value of each of the at least one ue according to the ue communication parameters, the path loss, and the scan loss corresponding to each ue. At this time, when the user communication parameter is the terminal gain parameter, the power control apparatus may first obtain a preset reference gain and a reference path loss. Wherein, the value of the reference gain is a maximum terminal gain parameter; the reference path loss is the minimum of the path loss due to under-satellite in the satellite coverage areaSince the distance between the point and the satellite is the shortest, the path loss is the smallest when transmitting a signal to the satellite point, and therefore the path loss corresponding to the satellite point can be determined as the reference path loss. And then, for each user terminal, determining a terminal gain reduction value and a path loss increase value corresponding to the user terminal according to preset reference gain and reference path loss, and a terminal gain parameter and path loss corresponding to the user terminal. The terminal gain reduction value corresponding to the user terminal is a reduction value of the terminal gain corresponding to the user terminal relative to a reference gain, and the path loss increase value corresponding to the user terminal is an increase value of the path loss corresponding to the user terminal relative to the reference path loss. For example, the terminal gain drop value corresponding to the ue is determined according to the following formula (18), where Δ Los _G Represents a terminal gain reduction value, G ₀ Representing a reference gain, G representing a terminal gain parameter corresponding to the user terminal; determining the path loss increase value delta Los corresponding to the user terminal according to the following formula (19) ₁ ，Los ₁ Represents the path loss value, los, corresponding to the user terminal ₀ Represents a reference path loss value, L ₀ Representing the distance between the sub-satellite point and the satellite.

ΔLos _G ＝|G ₀ -G| (18)

ΔLos ₁ ＝|Los ₁ -Los ₀ |＝|10×log ₁₀ (L ² )-10×log ₁₀ (L ₀ ² )| (19)

After determining the terminal gain reduction value and the path loss increase value corresponding to the user terminal, determining the loss value corresponding to the user terminal according to the terminal gain reduction value, the path loss increase value and the scanning loss corresponding to the user terminal according to the following formula (20).

Los _{General (1)} ＝ΔLos _G +ΔLos ₁ +|Los ₂ | (20)

In addition, when the user communication parameter is the terminal-specific loss parameter, for each user terminal, only the path loss increase Δ Los corresponding to the user terminal may be determined ₁ And Los scanning loss ₂ Without calculating the terminal gain reduction value corresponding to the ue, the specific loss value Los corresponding to the ue may be calculated according to the following formula (21) _{Specially for treating diabetes} The path loss increase value delta Los corresponding to the user terminal ₁ And loss of scanning Los ₂ The sum of the absolute values of the two is determined as the loss value corresponding to the user terminal.

Los _{General (1)} ＝Los _{Specially for treating diabetes} +ΔLos ₁ +|Los ₂ | (21)

After the loss value corresponding to each user terminal is determined, determining a power distribution proportion corresponding to each user terminal in at least one user terminal according to a ratio between the loss values corresponding to each user terminal in at least one user terminal, and determining the transmission power corresponding to the area where each user terminal is located according to the total transmission power of the target beam and the power distribution proportion corresponding to each user terminal in at least one user terminal. That is to say, the larger the loss value corresponding to a certain ue is, the larger the power allocation ratio corresponding to the ue is, the larger the determined transmission power corresponding to the area where the ue is located is.

Thus, the power control device can ensure that the user experience of at least one user terminal in the coverage area of the satellite is consistent as a control target, and the higher the scanning area is away from the satellite, the higher the corresponding loss value is, and the higher the corresponding transmission power is set; or, the maximum satellite capacity may be used as a control target, only the basic communication quality of the user terminal in the scanning area farthest from the satellite is guaranteed, the corresponding transmission power is set to be the lowest, and the closer the scanning area is to the satellite, the higher the corresponding transmission power is set. Therefore, the power control method is relatively more flexible and can meet different control requirements.

Fig. 7 is a power control method according to an embodiment of the present disclosure. As can be seen from the embodiment shown in fig. 3, when the power control device sets the corresponding relationship between the scanning area and the transmission power in advance, for the target beam being the signaling beam or the service beam, the power control device respectively sets the corresponding relationship between the scanning area corresponding to the signaling beam and the transmission power, and the corresponding relationship between the scanning area corresponding to the service beam and the transmission power. Therefore, when determining to transmit a signal, it is necessary to determine to transmit a signal using a signaling beam or using a service beam, and when determining to transmit a signal using a signaling beam, it is necessary to obtain a correspondence between a scanning area corresponding to a preset signaling beam and transmission power, and when determining to transmit a signal using a service beam, it is necessary to obtain a correspondence between a scanning area corresponding to a preset service beam and transmission power. Based on this, as shown in fig. 7, when the power control apparatus sets the correspondence between the scanning area and the transmission power for the signaling beam and the service beam, respectively, a specific power control method is as follows.

And step S701, determining a beam to be used.

Wherein the beam to be used comprises a signaling beam or a service beam.

In the embodiment of the present application, when transmitting a signal, the signal may be transmitted through a signaling beam or may be transmitted through a service beam, and the power control device needs to determine to scan the signal to be transmitted through the signaling beam or the service beam. The power control device broadcasts signals such as ephemeris information of a satellite to at least one user terminal in a satellite coverage area periodically through a signaling beam, so that the at least one user terminal reports the related information of the user terminal after receiving the signals, and the power control device provides service for each user terminal according to the related information of the user terminal subsequently, therefore, when the signals to be transmitted are signaling signals such as ephemeris information of the satellite, the beam to be used is determined to be the signaling beam; or, the power control device sends information such as a data file required by the user terminal to the user terminal through the service beam according to the user terminal requirement, at this time, the beam to be used is the service beam, for example, the user terminal a needs to transmit a first file to the user terminal B, the user terminal a sends a request message for transmitting the first file to the satellite, the power control device in the satellite receives the request message for transmitting the first file, and determines that the target user terminal is the user terminal B through the request message, at this time, the first file needs to be sent to the user terminal B through the service beam, so that the beam to be used is determined to be the service beam.

Step S702, determining a target scanning area.

Specifically, refer to step S201, which is not described herein again.

As a possible implementation manner, when a beam to be used is a signaling beam, at least one scanning area corresponding to a service beam is obtained;

or when the beam to be used is a service beam, determining the position information of the target user terminal;

acquiring at least one scanning area corresponding to a service beam;

and according to the position information of the target user terminal, determining a scanning area corresponding to the target user terminal in the scanning area corresponding to the beam to be used, and determining the scanning area as the target scanning area.

Specifically, the power control device broadcasts signaling signals such as ephemeris information of the satellite to at least one user terminal in the coverage area of the satellite periodically through the signaling beam, so as to inform the at least one user terminal of the ephemeris information of the satellite. The power control device generally presets a preset scanning sequence of at least one scanning area corresponding to the signaling beam, and then determines the target scanning area in sequence according to the preset scanning sequence of at least one scanning area corresponding to the signaling beam. For example, suppose that the power control device divides a satellite coverage area into 200 wave bits, determines a scanning area located in the due north direction of the satellite point, the scanning area farthest from the satellite point as a first scanning area, then sequentially determines a scanning order of each scanning area according to a clockwise scanning order, determines the first scanning area as a target scanning area according to a preset scanning order when it is determined that a signal needs to be transmitted through a signaling beam, performs a related step of scanning the transmission signal to the target scanning area, determines the second scanning area as the target scanning area according to the preset scanning order after the scanning is completed, and so on. Suppose that the power control device divides the satellite coverage area into 6 concentric rings, and sets the innermost concentric ring as the first scanning area in the order from inside to outside, and sets the north direction from the first concentric ring as the scanning starting point, and scans clockwise, and so on, and sets the scanning order for each concentric ring.

It should be noted that the above are only some examples of the preset scanning order, and the preset scanning order of the at least one scanning area corresponding to the signaling beam may be set according to actual requirements, which is not limited in this application.

Since at least one user terminal in the satellite coverage area reports the corresponding user terminal related information when accessing the satellite communication system, for example, the location information of the user terminal, the terminal gain information, and the like, the power control device stores the related information of the at least one user terminal, so that when the beam to be used is a service beam, the power control device can determine the location information of the target user terminal from the stored related information of the at least one user terminal in the satellite coverage area according to the identification information of the target user terminal. And then acquiring at least one scanning area corresponding to the service beam, determining the scanning area corresponding to the position of the target user terminal in the at least one scanning area corresponding to the service beam according to the position information of the target user terminal, and determining the scanning area as the target scanning area. For example, the user terminal a needs to transmit a first file to the user terminal B, and the user terminal a sends a request message for transmitting the first file to the satellite, where the request message carries data information of the first file and identification information of the user terminal B. The power control device on the satellite receives the first file transmission request message, determines the target user terminal as a user terminal B through the request message, and determines the position information of the user terminal B according to the identification information of the user terminal B in the stored relevant information of at least one user terminal in the satellite coverage area. The power control device obtains at least one scanning area corresponding to the service beam, and determines the scanning area corresponding to the user terminal B in the at least one scanning area corresponding to the service beam according to the position information of the user terminal B, namely the target scanning area.

It should be noted that, in the above example, another module, which may also be a satellite, receives the first file transmission request message sent by the user terminal a, and then forwards the request message to the power control apparatus, which is not limited in this application.

Step S703, obtaining a corresponding relationship between a preset scanning area corresponding to the beam to be used and the transmission power.

Specifically, when the beam to be used is a signaling beam, acquiring a corresponding relation between a preset scanning area corresponding to the signaling beam and the transmission power; and when the beam to be used is the service beam, acquiring the corresponding relation between the preset scanning area corresponding to the service beam and the transmitting power.

Specifically, refer to step S202, which is not described herein again.

Step S704, according to the target scanning area, in the corresponding relationship between the preset scanning area corresponding to the beam to be used and the transmission power, determining the target transmission power corresponding to the target scanning area.

Specifically, refer to step S203, which is not described herein again.

Step S705, according to the target transmitting power, scanning the transmitting signal to the target scanning area through the beam to be used.

Specifically, refer to step S204, which is not described herein again.

Illustratively, it is assumed that the power control device receives the user terminal A transmission

Thus, the power control device can set the corresponding relationship between the scanning area corresponding to the service beam and the transmission power and the corresponding relationship between the scanning area corresponding to the signaling beam and the transmission power respectively. When transmitting a signal, a beam to be used and a target scanning area may be determined first, and a correspondence between a scanning area corresponding to a preset beam to be used and transmission power is obtained according to the target scanning area. According to the corresponding relation between the target scanning area, the scanning area corresponding to the beam to be used and the transmitting power, the target transmitting power can be determined, the signal can be directly transmitted by the target transmitting power, and the power control process is simplified.

Corresponding to the above embodiments, as shown in fig. 8, an embodiment of the present application further provides a power control apparatus, including:

a processing unit 801 for determining a target scanning area;

an obtaining unit 802, configured to obtain a corresponding relationship between a preset scanning area and transmission power;

the processing unit 801 is further configured to determine, according to the target scanning area, a target transmitting power corresponding to the target scanning area in a preset corresponding relationship between the scanning area and the transmitting power;

the processing unit 801 is further configured to scan the transmission signal to the target scanning area according to the target transmission power.

As a possible implementation manner, the obtaining unit 802 is further configured to obtain a total transmit power of the target beam; the target beam comprises a signaling beam or a service beam;

as a possible implementation manner, the obtaining unit 802 is further configured to obtain a satellite coverage area, and divide the satellite coverage area into at least one scanning area corresponding to a target beam according to a size of a preset scanning area;

as a possible implementation manner, the processing unit 801 is further configured to determine, according to the total transmission power of the target beam, the transmission power corresponding to each scanning area in the at least one scanning area corresponding to the target beam, and generate a corresponding relationship between the at least one scanning area corresponding to the target beam and the transmission power.

As a possible implementation manner, the obtaining unit 802 is specifically configured to divide a satellite coverage area into at least one wave position corresponding to a target beam according to a preset wave position size corresponding to the target beam;

the processing unit 801 is specifically configured to determine a distance between each wave position in the at least one wave position corresponding to the target beam and the satellite, and a scanning angle of the satellite corresponding to each wave position in the at least one wave position corresponding to the target beam;

the processing unit 801 is further configured to determine a path loss and a scanning loss corresponding to each wave position according to a distance between each wave position and a satellite and a scanning angle of the satellite corresponding to each wave position;

an obtaining unit 802, further configured to obtain a terminal gain parameter corresponding to each wave position

The processing unit 801 is further configured to determine a loss value corresponding to each wave position according to the terminal gain parameter corresponding to each wave position, the path loss corresponding to each wave position, and the scanning loss;

the processing unit 801 is further configured to determine the transmit power corresponding to each wave position according to the total transmit power of the target beam and the loss value corresponding to each wave position, and generate a corresponding relationship between at least one wave position corresponding to the target beam and the transmit power.

As a possible implementation manner, the obtaining unit 802 is specifically configured to divide a satellite coverage area into at least one concentric ring corresponding to a target beam according to a size of a preset concentric ring corresponding to the target beam;

the processing unit 801 is specifically configured to determine a distance between each concentric ring and a satellite in at least one concentric ring corresponding to the target beam, and a satellite scanning angle corresponding to each concentric ring in at least one first concentric ring corresponding to the target beam;

the processing unit 801 is further configured to determine a path loss and a scan loss corresponding to each concentric ring according to a distance between each concentric ring and a satellite scan angle corresponding to each concentric ring;

the processing unit 801 is further configured to determine a loss value corresponding to each concentric ring according to the path loss and the scanning loss corresponding to each concentric ring;

the processing unit 801 is further configured to determine the transmit power corresponding to each concentric ring according to the total transmit power of the target beam and the loss value corresponding to each concentric ring, and generate a corresponding relationship between at least one concentric ring corresponding to the target beam and the transmit power.

As a possible implementation manner, the obtaining unit 802 is specifically configured to obtain, when the target beam includes a service beam, a region where at least one user terminal in a satellite coverage area is located;

a processing unit 801, configured to specifically obtain a user communication parameter corresponding to each ue in at least one ue;

the processing unit 801 is further configured to determine, according to the information of the area where each user terminal in the at least one user terminal is located, a distance between each user terminal and the satellite, and a satellite scanning angle corresponding to each user terminal;

the processing unit 801 is further configured to determine a path loss and a scanning loss of each user terminal according to a distance between each user terminal and a satellite scanning angle corresponding to each user terminal;

the processing unit 801 is further configured to determine a loss value corresponding to each ue according to the user communication parameter, the path loss, and the scanning loss corresponding to each ue;

the processing unit 801 is further configured to determine, according to the total transmission power of the target beam and the loss value corresponding to each user terminal, the service beam transmission power corresponding to the area where each user terminal is located, and generate a corresponding relationship between the area where at least one user terminal corresponding to the service beam is located and the transmission power.

As a possible implementation manner, the obtaining unit 802 is specifically configured to, when the target beam includes a service beam, divide the satellite coverage area into at least one parallel strip corresponding to the target beam according to a size of a preset parallel strip corresponding to the target beam;

a processing unit 801, specifically configured to determine a distance between each of the at least one parallel strips and a satellite, and a satellite scanning angle corresponding to each strip;

the processing unit 801 is further configured to determine a path loss and a scan loss corresponding to each strip according to a distance between each strip of the at least one parallel strip and a satellite scan angle corresponding to each strip;

the processing unit 801 is further configured to determine a loss value corresponding to each stripe according to a path loss and a scanning loss corresponding to each stripe;

the processing unit 801 is further configured to determine, according to the total transmission power of the target beam and the loss value corresponding to each stripe, the target beam transmission power corresponding to each stripe, and generate a corresponding relationship between at least one stripe corresponding to the target beam and the transmission power.

As a possible implementation manner, the obtaining unit 802 is specifically configured to, when the target beam is a service beam, divide the satellite coverage area into at least one concentric ring corresponding to the target beam according to the size of the concentric ring corresponding to the target beam;

the processing unit 801 is specifically configured to obtain a preset power distribution ratio parameter, and determine the preset power distribution ratio parameter as a power distribution ratio parameter of an outermost concentric ring of the at least one concentric ring;

the processing unit 801 is further configured to determine, according to the power distribution ratio parameter of the outermost concentric ring and according to a preset rule, the power distribution ratio parameter of the concentric rings, except for the outermost concentric ring, in at least one concentric ring; the preset rule comprises at least one concentric ring, wherein the smaller the radius of the outer ring is, the larger the power distribution proportion parameter of the concentric ring is;

the processing unit 801 is further configured to determine a transmission power corresponding to each concentric ring according to the total transmission power of the target beam and the power proportion distribution parameter of each concentric ring in the at least one concentric ring, and generate a corresponding relationship between the at least one concentric ring corresponding to the target beam and the transmission power.

As a possible implementation manner, the processing unit 801 is further configured to determine a beam to be used; the beams to be used comprise signaling beams or service beams;

an obtaining unit 802, specifically configured to obtain a correspondence between a preset scanning area corresponding to a beam to be used and transmission power;

the processing unit 801 is specifically configured to determine, according to a target scanning area, a target transmitting power corresponding to the target scanning area in a corresponding relationship between a preset scanning area corresponding to a beam to be used and the transmitting power;

the processing unit 801 is specifically configured to scan the transmit signal to the target scanning area through the beam to be used according to the target transmit power.

As a possible implementation manner, the processing unit 801 is specifically configured to, when a beam to be used is a signaling beam, acquire at least one scanning area corresponding to a service beam; determining a target scanning area in at least one scanning area corresponding to the signaling beam according to a preset scanning sequence of at least one scanning area corresponding to the signaling beam;

or, the processing unit 801 is further configured to determine location information of the target user equipment when the beam to be used is a service beam; acquiring at least one scanning area corresponding to a service beam; and according to the position information of the target user terminal, determining a scanning area corresponding to the target user terminal in the scanning area corresponding to the service beam, and determining the scanning area as the target scanning area.

Corresponding to the embodiment, the application further provides the electronic equipment. Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, where the electronic device 900 may include: a processor 901, a memory 902, and a communication unit 903. The components communicate via one or more buses, and those skilled in the art will appreciate that the architecture of the server shown in the figures is not intended to limit embodiments of the present invention, and may be a bus architecture, a star architecture, a combination of more or fewer components than shown, or a different arrangement of components.

The communication unit 903 is configured to establish a communication channel, so that the electronic device may communicate with other devices. And receiving user data sent by other equipment or sending the user data to other equipment.

The processor 901, which is a control center of the electronic device, connects various parts of the whole electronic device by using various interfaces and lines, and executes various functions of the electronic device and/or processes data by running or executing software programs and/or modules stored in the memory 902 and calling data stored in the memory. The processor may be formed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs with the same or different functions connected. For example, the processor 901 may include only a Central Processing Unit (CPU). In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.

The memory 902 is used for storing the execution instructions of the processor 901, and the memory 902 may be implemented by any type of volatile or non-volatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk or an optical disk.

The execution of the instructions in memory 902, when executed by processor 901, enables electronic device 900 to perform some or all of the steps in the embodiments shown in fig. 3 or fig. 7.

In specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the power control method provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

The same and similar parts in the various embodiments in this specification may be referred to each other. Especially, as for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.

Claims

1. A method of power control, comprising:

determining a target scanning area;

2. The method of claim 1, further comprising, prior to said determining the target scan area:

3. The method of claim 2, wherein the preset scan area size comprises: the size of a preset scanning area corresponding to the signaling beam or the size of a preset scanning area corresponding to the service beam.

4. The method of claim 2, wherein the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam comprises:

determining, according to the total transmission power of the target beam, the transmission power corresponding to each scanning area in the at least one scanning area corresponding to the target beam, and generating a correspondence between the at least one scanning area corresponding to the target beam and the transmission power includes:

obtaining the terminal gain parameter corresponding to each wave position

5. The method of claim 2, wherein the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam comprises:

6. The method of claim 2, wherein the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam comprises:

7. The method of claim 6, wherein the user communication parameters for each user terminal comprise a terminal gain parameter or a terminal-specific loss parameter corresponding to each user terminal.

8. The method of claim 2, wherein the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam comprises:

determining path loss and scanning loss corresponding to each strip according to the distance between each strip in the at least one parallel strip and a satellite and the satellite scanning angle corresponding to each strip;

9. The method of claim 2, wherein the dividing the satellite coverage area into at least one scanning area corresponding to the target beam according to the preset scanning area size corresponding to the target beam comprises:

10. The method according to claim 1, further comprising, before said obtaining the preset correspondence between scanning areas and transmission powers:

11. The method of claim 10, wherein the determining a target scan area comprises:

acquiring at least one scanning area corresponding to the service beam;

and determining a scanning area corresponding to the target user terminal in the scanning area corresponding to the service beam according to the position information of the target user terminal, and determining the scanning area as the target scanning area.

12. A power control apparatus, comprising:

a processing unit for determining a target scanning area;

the processing unit is further configured to determine, according to the target scanning area, a target transmitting power corresponding to the target scanning area in the corresponding relationship between the preset scanning area and the transmitting power;

13. An electronic device, comprising: a processor and a memory, the memory storing a computer program that, when executed, causes the electronic device to perform the method of any of claims 1-11.

14. A storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when executed, controls an apparatus in which the storage medium is located to perform the method of any of claims 1-11.