Satellite communication method and device, satellite base station, storage medium and program product

Abstract

The invention provides a satellite communication method and device, a satellite base station, a storage medium and a program product, which can be applied to the technical field of satellite communication. The method is applied to a satellite base station, and comprises the following steps: determining the current wave position of a terminal; determining a receiving gain corresponding to the beam position based on the distance between the satellite base station and the beam position; and performing gain compensation on the uplink signal of the terminal by adopting the receiving gain. According to the invention, the terminal does not need to frequently perform uplink power control, the power control operation of the terminal is reduced, the power consumption of the terminal is further reduced, and the signaling power consumption between the terminal and the satellite base station is also reduced.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular to a satellite communication method, device, satellite base station, storage medium and program product. Background Art

[0002] In non-terrestrial network (NTN) communications, such as satellite communication scenarios, satellite base stations move at high speeds, and terminals need to frequently perform uplink power control to ensure the signal transmission quality between the terminal and the satellite base station.

[0003] On the one hand, frequent uplink power control leads to high power consumption of the terminal; on the other hand, during uplink power control, the satellite base station sends a power control message to the terminal, and the terminal performs power control after receiving the power control message, resulting in high signaling overhead between the terminal and the satellite base station. Summary of the invention

[0004] The present application provides a satellite communication method, device, satellite base station, storage medium and program product, which do not require a terminal to frequently perform uplink power control, reduce the power control operation of the terminal, thereby reducing the power consumption of the terminal, and also reduce the signaling power consumption between the terminal and the satellite base station.

[0005] In a first aspect, the present application provides a satellite communication method, which is applied to a satellite base station, and the method includes:

[0006] Determine the current wave position of the terminal;

[0007] Determining a receiving gain corresponding to the beam position based on a distance between the satellite base station and the beam position;

[0008] The receiving gain is used to perform gain compensation on the uplink signal of the terminal.

[0009] In some embodiments, determining the receiving gain corresponding to the beam position based on the distance between the satellite base station and the beam position includes:

[0010] Determining a minimum receiving gain in an uplink direction of the satellite base station;

[0011] determining a path loss of the beam position based on a distance between the satellite base station and the beam position;

[0012] The difference between the minimum receiving gain and the path loss of the beam position is determined as the receiving gain of the beam position.

[0013] In some embodiments, determining the minimum receiving gain in the uplink direction of the satellite base station includes:

[0014] Acquire a sensitivity threshold of the satellite base station; the sensitivity threshold is used to represent the minimum signal strength that can be detected by the satellite base station;

[0015] Determining a reference transmit power of the terminal; the reference transmit power is used to measure the transmit capability of the terminal relative to a cell center;

[0016] The difference between the sensitivity threshold and the reference transmit power is determined as the minimum receiving gain.

[0017] In some embodiments, the determining the reference transmit power of the terminal includes:

[0018] Obtaining uplink transmission power of the terminal, and obtaining a reference path loss of a reference wave position located at a cell center;

[0019] The difference between the uplink transmit power and the reference path loss is determined as the reference transmit power.

[0020] In some embodiments, the acquiring the uplink transmit power of the terminal includes:

[0021] In the case where a communication link has been established with the terminal, obtaining an uplink transmission power stored corresponding to a terminal identifier of the terminal; the uplink transmission power is obtained and stored from communication related information sent by the terminal when the communication link is established with the terminal; or,

[0022] In the case where a communication link is not established with the terminal, the preset transmission power is determined as the uplink transmission power of the terminal.

[0023] In some embodiments, determining the current wave position of the terminal includes:

[0024] In the case where a communication link has been established with the terminal, determining the current location information of the terminal, determining the location range to which the location information belongs from the location ranges of multiple locations in the cell, and determining the location to which the location range belongs as the location at which the terminal is currently located; or

[0025] Without establishing a communication link with the terminal, historical location information of the terminal is obtained, and the location range to which the historical location information belongs is determined from the location ranges of multiple wavebands in the cell, and the waveband to which the location range belongs is determined as the waveband where the terminal is currently located.

[0026] In a second aspect, the present application provides a satellite communication device, which is arranged in a satellite base station, and the device includes:

[0027] A first determination module is used to determine the current wave position of the terminal;

[0028] A second determination module is used to determine the receiving gain corresponding to the beam position based on the distance between the satellite base station and the beam position;

[0029] A gain compensation module is used to perform gain compensation on the uplink signal of the terminal using the receiving gain.

[0030] In a third aspect, the present application provides a satellite base station, comprising: a processor and a memory communicatively connected to the processor;

[0031] The memory stores computer-executable instructions;

[0032] The processor executes the computer-executable instructions stored in the memory to implement the satellite communication method as described in any one of the first aspects.

[0033] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the satellite communication method described in any one of the first aspects.

[0034] In a fifth aspect, the present application provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the satellite communication method described in any one of the first aspects is implemented.

[0035] The present application provides a satellite communication method, device, satellite base station, storage medium and program product. The satellite base station can determine the receiving gain corresponding to the wave position according to the distance between it and the wave position. For a terminal located in the wave position, the receiving gain is used to perform gain compensation on the uplink signal of the terminal, thereby compensating for the path loss of the uplink signal during the transmission process and the insufficient uplink transmission power of the terminal. In this way, there is no need for the terminal to frequently perform uplink power control, which reduces the power control operation of the terminal, thereby reducing the power consumption of the terminal, and also reduces the signaling power consumption between the terminal and the satellite base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] Figure 1 It is a schematic diagram of an application scenario provided by this application;

[0038] Figure 2 It is a flowchart of a satellite communication method provided by the present application;

[0039] Figure 3 It is a flowchart of another satellite communication method provided by the present application;

[0040] Figure 4 It is a scenario schematic diagram of a satellite communication method provided by the present application;

[0041] Figure 5 It is a schematic diagram of another scenario of a satellite communication method provided by the present application;

[0042] Figure 6 It is a structural schematic diagram of a satellite communication device provided by the present application;

[0043] Figure 7 It is a structural schematic diagram of a satellite base station provided by this application.

[0044] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] In the Non-Terrestrial Networks (NTN) communication scenario, common architectures are transparent load (also known as transparent forwarding) and renewable load (also known as base station on satellite). Base station on satellite is equivalent to deploying base stations on satellites. Satellites have the functions of base stations, and terminals can communicate directly with satellites. In other words, satellites and terminals communicate directly through switching equipment on satellites without the need for transit through ground gateways. Satellite communications have the characteristics of fast transmission rate, wide coverage, and the ability to carry a variety of communication services. They are irreplaceable in practical applications. Figure 1 is a schematic diagram of an application scenario provided by this application. Figure 1 As shown, a user on Earth uses a satellite phone terminal to communicate with a remote satellite.

[0047] In satellite communication scenarios, satellite base stations move at high speeds, and terminals need to frequently perform uplink power control to ensure the quality of signal transmission between the terminal and the satellite base station. Uplink power control is used to adjust the transmit power of the terminal's uplink channel. Under the condition of ensuring the reception performance of the satellite base station, the minimum transmit power is used to minimize the interference reaching the satellite base station to meet the capacity and coverage requirements. In the terrestrial fifth-generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) network standard, 3GPP TS38.213 (a communication standard) provides the uplink power control process, and both satellite base stations and terminals perform uplink power control in accordance with this standard.

[0048] On the one hand, frequent uplink power control leads to high power consumption of the terminal; on the other hand, during uplink power control, the satellite base station sends a power control message to the terminal, and the terminal performs power control after receiving the power control message, resulting in high signaling overhead between the terminal and the satellite base station.

[0049] Reducing the frequency of power control can save terminal resources, reduce link signaling overhead, and provide more resources for service processing. Therefore, how to reduce the frequency of power control has become an urgent problem to be solved.

[0050] Based on this, the present application proposes a satellite communication method, device, satellite base station, storage medium and program product, aiming to solve the above technical problems.

[0051] The starting point of the present application is that the satellite base station performs uplink reception gain compensation according to the distance between the satellite base station and the wave position, so that after the terminal successfully establishes a link, the satellite base station performs uplink reception gain compensation, so that the satellite base station no longer needs to send power control messages to the terminal, and the terminal does not need uplink power control. The terminal can achieve communication by maintaining its transmission power for establishing the link.

[0052] The execution subject of the satellite communication method provided in the present application is a satellite communication device, and the satellite communication device is integrated in a satellite base station.

[0053] In an embodiment of the present application, the satellite base station may be a low-orbit satellite base station or other suitable satellite base stations. The present application does not limit the specific form of the satellite base station.

[0054] In the embodiment of the present application, the terminal may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal in the embodiments of the present application may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a public land mobile network (PLMN) to be evolved in the future, etc. In addition, the terminal may also be a terminal device in an Internet of Things (IoT) system. This application does not limit the specific form of the terminal.

[0055] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0056] Figure 2 is a flow chart of a satellite communication method provided by this application. Figure 2 As shown, the satellite communication method provided in this embodiment includes the following steps.

[0057] Step S101, determining the current wave position of the terminal.

[0058] The geographical area covered by the satellite base station can be called a cell. The beam position corresponds to the beam of the satellite antenna, representing the specific location and direction of the beam in space. It can be said that the cell is covered by the beam. A cell contains multiple beam positions, which together constitute the coverage of the cell.

[0059] In actual applications, the satellite base station needs to first determine the current wave position of the terminal, and then communicate with the terminal through the satellite communication method provided in this application.

[0060] Step S102: determining the receiving gain corresponding to the beam position based on the distance between the satellite base station and the beam position.

[0061] The wave position refers to the wave position where the terminal is currently located. The receiving gain refers to the ability of the satellite receiver to amplify the received signal through the antenna and other technical means. The receiving gain can increase the strength of the signal, making it easier for the satellite receiver to detect and decode. The receiving gain corresponding to the wave position is used to compensate for the uplink signal sent by the terminal in the wave position, so as to compensate for the path loss of the uplink signal during the transmission process and the insufficient uplink transmission power of the terminal.

[0062] Among them, path loss refers to the phenomenon that the signal gradually weakens during transmission due to various factors (such as atmospheric attenuation, distance attenuation, multipath effect, etc.). Path loss is related to the orbital height of the satellite base station, the location of the terminal, and the relative position between them. The higher the orbital height, the larger the space the signal needs to traverse, and the greater the path loss.

[0063] Optionally, the distance between the satellite base station and the beam position can be determined according to the position of the satellite base station and the position of the beam position center. Exemplarily, the position of the satellite base station and the position of the beam position center can be respectively represented by three-dimensional coordinates in the earth coordinate system.

[0064] Step S103: Use the receiving gain to perform gain compensation on the uplink signal of the terminal.

[0065] The receiving gain refers to the receiving gain corresponding to the wave position that the terminal is currently in. After successfully establishing a link with a satellite base station, the terminal can send an uplink signal to the satellite base station, which is received and processed accordingly by the satellite base station and then forwarded to other terminals, thereby realizing satellite communication.

[0066] In this embodiment, since the distance between the terminal and the satellite base station is long, there is path loss in the transmission of the uplink signal. After receiving the uplink signal from the terminal, the satellite base station uses the receiving gain corresponding to the wave position of the terminal to perform gain compensation on the uplink signal to compensate for the path loss of the uplink signal during transmission and the insufficient uplink transmission power of the terminal, and then demodulates the gain-compensated signal to restore the original data.

[0067] In this embodiment, the satellite base station can determine the receiving gain corresponding to the wave position according to the distance between it and the wave position. For the terminal located in the wave position, the receiving gain is used to perform gain compensation on the uplink signal of the terminal, thereby compensating for the path loss of the uplink signal during the transmission process and the insufficient uplink transmission power of the terminal. In this way, the terminal does not need to frequently perform uplink power control, which reduces the power control operation of the terminal, thereby reducing the power consumption of the terminal, and also reducing the signaling power consumption between the terminal and the satellite base station. In addition, by performing dynamic gain compensation through the satellite base station, the terminal does not need to maintain a large transmission power at the edge of the cell, thereby reducing the power consumption of the terminal.

[0068] Figure 3 It is a flowchart of another satellite communication method provided by the present application, such as Figure 3 As shown, the satellite communication method provided in this embodiment is based on the satellite communication method provided in the previous embodiment of the present application, and step S102 is further refined. The satellite communication method provided in this embodiment includes the following steps.

[0069] Step S201, determining the current wave position of the terminal.

[0070] In this embodiment, the implementation of step S201 is the same as the implementation of step S101 in the previous embodiment, and will not be repeated here.

[0071] In some embodiments, step S201 is specifically implemented as follows: when a communication link has been established with the terminal, determining the current location information of the terminal; determining the location range to which the location information belongs from the location ranges of multiple wavebands in the cell, and determining the waveband to which the location range belongs as the waveband where the terminal is currently located.

[0072] Among them, the current location information of the terminal is used to indicate the current location of the terminal. Exemplarily, the location can be represented by three-dimensional coordinates in the earth coordinate system. In one scenario, once the communication link is established, the satellite base station can obtain the location information of the terminal. This can be achieved in a variety of ways, such as using a satellite navigation system, base station positioning technology (such as triangulation positioning of cellular networks), or any other available positioning technology. Among them, the communication link is also called a communication link, which refers to the communication link established between the terminal and the satellite base station. The communication link is established to ensure that the terminal can send and receive data, and the satellite base station acts as a relay station to forward the signal from one terminal to another terminal or ground station.

[0073] Among them, the satellite base station stores the location range of each wave position in the cell. Since the wave position represents a geographical area, the position of the wave position is expressed in the form of a position range. For example, if the geographical area corresponding to the wave position is a circle, the position range of the wave position can be expressed by combining the position of the wave position center and the radius of the geographical area. Exemplarily, the position of the wave position center can be expressed in three-dimensional coordinates under the earth coordinate system. It should be noted that due to factors such as the high-speed movement of the satellite base station and the rotation of the earth, the cell and the wave position will change dynamically. Therefore, in practical applications, it is necessary to continuously monitor and adjust the position range of the cell and the wave position to adapt to these changes.

[0074] If the location indicated by the location information of the terminal is within the location range of a certain wave position, it means that the terminal is currently in the wave position, that is, the wave position is the wave position where the terminal is currently located; conversely, if the location indicated by the location information of the terminal is not within the location range of a certain wave position, it means that the terminal is not currently in the wave position. This embodiment determines the wave position where the terminal is located based on the location information of the terminal and the location range of each wave position, with high accuracy.

[0075] In other embodiments, step S201 is specifically implemented as follows: without establishing a communication link with the terminal, historical location information of the terminal is obtained, and the location range to which the historical location information belongs is determined from the location ranges of multiple wave positions in the cell, and the wave position to which the location range belongs is determined as the wave position where the terminal is currently located.

[0076] Among them, when communicating with the terminal, the satellite base station can store the location information of the terminal, and the stored location information can be regarded as the historical location information of the terminal. For example, the terminal identifier of the terminal is stored corresponding to the location information. In one scenario, if the terminal has not established a communication link with the satellite base station, the satellite base station can obtain the stored historical location information and determine the wave position where the terminal may currently be located based on the historical location information. Among them, the terminal identifier is used to uniquely identify the terminal to distinguish different terminals. Exemplarily, the terminal identifier is information such as an Internet Protocol (IP) address, an International Mobile Equipment Identity (IMEI) or a satellite communication specific identifier.

[0077] In this embodiment, after step S201, based on the distance between the satellite base station and the terminal's beam position, the receiving gain corresponding to the terminal's beam position is determined, that is, step S102 is executed. In some embodiments, step S102 is specifically implemented as the following steps S202-S203.

[0078] Step S202, determining the minimum receiving gain in the uplink direction of the satellite base station.

[0079] The minimum receiving gain in the uplink direction refers to the receiving gain corresponding to the reference wave position located at the center of the cell.

[0080] For example, see Figure 4 The satellite's orbital altitude is 600 kilometers (km), the radius of the circular cell is 800km (the radius of the earth is 6356km), the radius of the circular wave position is 15km, and a cell diameter can accommodate 53 wave positions. Wave position 0 is the wave position at the center of multiple wave positions. At this time, the satellite is just above wave position 0.

[0081] In some embodiments, step S202 is specifically implemented as follows: obtaining a sensitivity threshold of a satellite base station; determining a reference transmit power of a terminal; and determining a difference between the sensitivity threshold and the reference transmit power as a minimum receiving gain.

[0082] The sensitivity threshold is used to indicate the minimum signal strength that a satellite base station can detect. The sensitivity threshold is usually expressed in decibel milliwatts (dBm), which reflects the satellite receiver's ability to capture and process weak signals under specific conditions. In one scenario, the sensitivity threshold is determined by the design and performance of the satellite receiver. If the signal strength is lower than this sensitivity threshold, the satellite base station may not be able to correctly decode or receive the signal.

[0083] The reference transmit power is used to measure the transmit capability of the terminal relative to the center of the cell. Optionally, determining the reference transmit power of the terminal is specifically implemented by: obtaining the uplink transmit power of the terminal, and obtaining the reference path loss of the reference wave position located at the center of the cell; and determining the difference between the uplink transmit power and the reference path loss as the reference transmit power.

[0084] In practical applications, the minimum input signal strength = terminal uplink transmit power - path loss + receiving gain. This formula describes the process of the signal being transmitted from the terminal to the satellite base station and reaching the sensitivity threshold of the satellite base station. In this process: the terminal's uplink transmit power is the initial strength of the signal. Path loss is the amount by which the signal gradually weakens during transmission. Receiving gain is the amount by which the satellite receiver amplifies the signal. In order for the signal to reach the satellite's sensitivity threshold (i.e., the minimum input signal strength), the combined effect of these three factors needs to be considered. If the uplink transmit power is higher, the path loss is smaller, or the receiving gain is larger, then the signal is more likely to reach or exceed the satellite's sensitivity threshold.

[0085] The terminal has a fixed uplink transmission power, which determines the initial strength of the signal when it is sent from the ground to the satellite. The higher the uplink transmission power, the stronger the signal's anti-interference ability during transmission. In satellite communication systems, certain communication protocols are usually followed between the terminal and the satellite base station. These communication protocols include reports or instructions on transmission power, allowing the terminal to report its uplink transmission power to the satellite when establishing a communication link.

[0086] Optionally, when establishing a communication link with the terminal, the uplink transmit power of the terminal is obtained from the communication related information sent by the terminal, and the uplink transmit power is stored corresponding to the terminal identifier; accordingly, when a communication link has been established with the terminal, obtaining the uplink transmit power of the terminal is specifically implemented as: obtaining the uplink transmit power stored corresponding to the terminal identifier of the terminal. Among them, the communication related information may also include other communication information, which is not limited in this application.

[0087] Optionally, when a communication link is not established with the terminal, obtaining the uplink transmit power of the terminal is specifically implemented by: determining the preset transmit power as the uplink transmit power of the terminal. The preset transmit power can be set according to actual needs, and this application does not limit this. For example, the preset transmit power can be determined according to the historical uplink transmit power of the terminal.

[0088] This embodiment provides corresponding solutions for obtaining the uplink transmission power of the terminal according to the scenario of whether a communication link is established with the terminal, and the adaptability of the solution is strong.

[0089] Optionally, the reference path loss of the reference beam position may be determined by using the following formula based on the distance between the satellite base station and the reference beam position:

[0090] L0=|20 log 10 (h / s0)|

[0091] Among them, L0 represents the reference path loss of the reference wave position, h represents the orbital height of the satellite base station, s0 represents the distance between the satellite base station and the reference wave position, and |x| represents the absolute value of x.

[0092] It should be noted that due to the small radius of the wave position, the relative path loss at different positions within a wave position can be ignored.

[0093] Step S203: determining the path loss of the wave position where the terminal is located based on the distance between the satellite base station and the wave position where the terminal is located.

[0094] In some embodiments, step S203 is specifically implemented as follows: based on the distance between the satellite base station and the wave position where the terminal is located, the path loss of the wave position where the terminal is located is determined using the following formula:

[0095] L=|20 log 10 (h / s)|

[0096] Among them, L represents the path loss of the terminal's wave position, h represents the orbital height of the satellite base station, s represents the distance between the satellite base station and the terminal's wave position, and |x| represents the absolute value of x.

[0097] Step S204: determine the difference between the minimum receiving gain and the path loss at the wave position where the terminal is located as the receiving gain at the wave position where the terminal is located.

[0098] This embodiment allows the satellite base station to dynamically adjust the receiving gain to adapt to the distance change between the satellite base station and the terminal, which is particularly important in low-orbit satellite systems because the rapid movement of the satellite base station relative to the terminal will cause frequent changes in path loss. On the other hand, by accurately calculating the required receiving gain, excessive transmission power can be avoided, thereby saving power consumption of the terminal and the satellite.

[0099] Step S205: Perform gain compensation on the uplink signal of the terminal using the receiving gain of the wave position where the terminal is located.

[0100] In this embodiment, the implementation of step S205 is the same as the implementation of step S103 in the previous embodiment, and will not be repeated here.

[0101] The following uses two scenarios as examples to illustrate the receiving gain of the wave position.

[0102] The first scenario is used to illustrate the satellite gain compensation for different wave positions. Figure 4 As shown in the figure, for a satellite with an orbit height of 600km, the radius of the circular cell is 800km (the radius of the earth is 6356km), the radius of the circular wave position is 15km, and a cell diameter can accommodate 53 wave positions. At this time, the satellite is just above wave position 0, the distance between the center of wave position 1 and the satellite is 600.8km, the distance between the center of wave position 2 and the satellite is 603.3km, and the distance between the center of wave position 26 and the satellite is 1012km. The path loss of wave position 0 is |20log 10 (600 / 600)|=0, relative to wave position 0, the path loss of wave position 1 is 0.016 decibels (db), the path loss of wave position 2 is 0.048db, and so on, the path loss of wave position 26 is 4.541db, as shown in Table 1 below.

[0103] Table 1 Distances between the wave center and the satellite and the corresponding path loss

[0104]

[0105] Assuming that the receiving gain of the wave position 0 at the sub-satellite point is gain0, the receiving gain of the wave position 1 is gain1 = gain+0.016, the receiving gain of the wave position 2 is gain2 = gain0+0.048, and so on. The receiving gain of the wave position 26 is gain26 = gain0+4.541.

[0106] The second scenario is used to illustrate the satellite gain compensation for the same wave position. Figure 5 As shown in the figure, for a satellite with an orbit height of 600km, the radius of the circular cell is 800km (the radius of the earth is 6356km), the radius of the circular wave position is 15km, and a cell diameter can accommodate 53 wave positions. The speed of the satellite is 7.62 kilometers per second (km / s). Assuming that at time T0, the satellite is just above wave position 0, due to the movement of the satellite, the distance between the satellite and wave position 0 becomes 600.4km after 2 seconds, and the path loss increases by 0.006db. After another 2 seconds, the distance between the satellite and wave position 0 becomes 600.8km, and the path loss increases by 0.016db.

[0107] Figure 6 is a schematic diagram of the structure of a satellite communication device provided by the present application, such as Figure 6 As shown, in this embodiment, the satellite communication device 30 can be arranged in a satellite base station, and the satellite communication device 30 includes:

[0108] The first determination module 301 is used to determine the current wave position of the terminal;

[0109] A second determination module 302 is used to determine a receiving gain corresponding to the beam position based on a distance between the satellite base station and the beam position;

[0110] The gain compensation module 303 is used to perform gain compensation on the uplink signal of the terminal by using the receiving gain.

[0111] In some embodiments, the second determining module 302 includes:

[0112] A first determining unit, configured to determine a minimum receiving gain in an uplink direction of the satellite base station;

[0113] A second determining unit, configured to determine a path loss of the wave position based on a distance between the satellite base station and the wave position;

[0114] The third determination unit is used to determine the difference between the minimum receiving gain and the path loss of the beam position as the receiving gain of the beam position.

[0115] In some embodiments, the first determining unit is configured to:

[0116] Get the sensitivity threshold of the satellite base station; the sensitivity threshold is used to indicate the minimum signal strength that can be detected by the satellite base station;

[0117] Determine the reference transmit power of the terminal; the reference transmit power is used to measure the transmission capability of the terminal relative to the center of the cell;

[0118] The difference between the sensitivity threshold and the reference transmit power is determined as the minimum receive gain.

[0119] In some embodiments, the first determining unit, when determining the reference transmit power of the terminal, is configured to:

[0120] Obtaining the uplink transmission power of the terminal, and obtaining the reference path loss of the reference wave position located at the center of the cell;

[0121] The difference between the uplink transmit power and the reference path loss is determined as the reference transmit power.

[0122] In some embodiments, the first determining unit, when acquiring the uplink transmit power of the terminal, is configured to:

[0123] When a communication link has been established with the terminal, obtaining the uplink transmission power stored corresponding to the terminal identifier of the terminal; the uplink transmission power is obtained and stored from the communication related information sent by the terminal when the communication link is established with the terminal; or,

[0124] When no communication link is established with the terminal, the preset transmit power is determined as the uplink transmit power of the terminal.

[0125] In some embodiments, the first determining module 301 is configured to:

[0126] In the case where a communication link has been established with the terminal, determining the current location information of the terminal, determining the location range to which the location information belongs from the location ranges of multiple wave positions in the cell, and determining the wave position to which the location range belongs as the wave position where the terminal is currently located; or

[0127] Without establishing a communication link with the terminal, historical location information of the terminal is obtained, and the location range to which the historical location information belongs is determined from the location ranges of multiple wave positions in the cell, and the wave position to which the location range belongs is determined as the wave position where the terminal is currently located.

[0128] The satellite communication device 30 provided in this embodiment can execute the technical solution of the corresponding method embodiment. Its implementation principle and technical effect are similar to those of the corresponding method embodiment, and will not be repeated here.

[0129] An embodiment of the present application also provides a satellite base station. Figure 7 This is a schematic diagram of the structure of a satellite base station provided by this application. Figure 7 As shown, the satellite base station 40 includes: a processor 401 and a memory 402 communicatively connected to the processor 401 .

[0130] The memory 402 stores computer-executable instructions; the processor 401 executes the computer-executable instructions stored in the memory 402 to implement the satellite communication method provided in the present application.

[0131] In the embodiment of the present application, the memory 402 and the processor 401 are connected via a bus. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc.

[0132] The components, their connections and relationships, and their functions shown herein are only examples and are not intended to limit the implementation of the present application described and / or required herein. The various components are interconnected using different buses and can be installed on a common motherboard or in other ways as needed.

[0133] In an exemplary embodiment, a computer-readable storage medium is also provided, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the satellite communication method provided in the present application.

[0134] In an exemplary embodiment, a computer program product is also provided, including a computer program. When the computer program in the computer program product is executed by a processor, it is used to implement the satellite communication method provided in the present application.

[0135] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

[0136] It should be further noted that, although the various steps in the flowchart are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowchart may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0137] It should be understood that the above-mentioned device embodiments are only illustrative, and the device of the present application can also be implemented in other ways. For example, the division of units / modules in the above-mentioned embodiments is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units, modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0138] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application may be integrated into one unit / module, each unit / module may exist physically separately, or two or more units / modules may be integrated together. The above-mentioned integrated unit / module may be implemented in the form of hardware or in the form of a software program module.

[0139] If the integrated unit / module is implemented in the form of hardware, the hardware may be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. Unless otherwise specified, the processor may be any appropriate hardware processor, such as a central processing unit (CPU), a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a digital signal processor (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components. Unless otherwise specified, the memory can be implemented by any type of volatile or non-volatile storage device or a combination of them, such as a USB flash drive, random-access memory (RAM), static random-access memory (SRAM), dynamic random-access memory (DRAM), enhanced dynamic random-access memory (EDRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), high-bandwidth memory (HBM) or hybrid memory cube (HMC) and other media that can store program code.

[0140] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0141] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims.

[0142] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A satellite communication method, characterized in that: Applied to a satellite base station, the method comprises: Determine the current wave position of the terminal; Determining a receiving gain corresponding to the beam position based on a distance between the satellite base station and the beam position; The receiving gain is used to perform gain compensation on the uplink signal of the terminal.

2. The method according to claim 1, characterized in that The determining, based on the distance between the satellite base station and the beam position, a receiving gain corresponding to the beam position includes: Determining a minimum receiving gain in an uplink direction of the satellite base station; determining a path loss of the beam position based on a distance between the satellite base station and the beam position; The difference between the minimum receiving gain and the path loss of the beam position is determined as the receiving gain of the beam position.

3. The method according to claim 2, characterized in that The determining of the minimum receiving gain in the uplink direction of the satellite base station includes: Acquire a sensitivity threshold of the satellite base station; the sensitivity threshold is used to represent the minimum signal strength that can be detected by the satellite base station; Determining a reference transmit power of the terminal; the reference transmit power is used to measure the transmit capability of the terminal relative to a cell center; The difference between the sensitivity threshold and the reference transmit power is determined as the minimum receiving gain.

4. The method according to claim 3, characterized in that The determining a reference transmit power of the terminal includes: Obtaining uplink transmission power of the terminal, and obtaining a reference path loss of a reference wave position located at a cell center; The difference between the uplink transmit power and the reference path loss is determined as the reference transmit power.

5. The method according to claim 4, characterized in that The obtaining the uplink transmit power of the terminal includes: In the case where a communication link has been established with the terminal, obtaining an uplink transmission power stored corresponding to a terminal identifier of the terminal; the uplink transmission power is obtained and stored from communication related information sent by the terminal when the communication link is established with the terminal; or, In the case where a communication link is not established with the terminal, the preset transmission power is determined as the uplink transmission power of the terminal.

6. The method according to claim 1, characterized in that The determining the current wave position of the terminal includes: In the case where a communication link has been established with the terminal, determining the current location information of the terminal, determining the location range to which the location information belongs from the location ranges of multiple locations in the cell, and determining the location to which the location range belongs as the location at which the terminal is currently located; or Without establishing a communication link with the terminal, historical location information of the terminal is obtained, and the location range to which the historical location information belongs is determined from the location ranges of multiple wavebands in the cell, and the waveband to which the location range belongs is determined as the waveband where the terminal is currently located.

7. A satellite communication device, characterized in that: Set in a satellite base station, the device includes: A first determination module is used to determine the current wave position of the terminal; A second determination module is used to determine the receiving gain corresponding to the beam position based on the distance between the satellite base station and the beam position; A gain compensation module is used to perform gain compensation on the uplink signal of the terminal using the receiving gain.

8. A satellite base station, characterized in that: include: A processor and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the satellite communication method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the satellite communication method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the satellite communication method according to any one of claims 1 to 6 is implemented.

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