Satellite communicable area determination method and user terminal

Abstract

The embodiment of the invention provides a satellite communicable area determination method and a user terminal. The method comprises the following steps: based on a received real-time satellite signal, acquiring the signal receiving and transmitting capability and the satellite-ground path loss of a satellite; determining a threshold value meeting a current communication link requirement according to the signal receiving and transmitting capability of the satellite and the satellite-ground path loss in combination with signal performance data received by a user terminal; and according to the threshold value, displaying a satellite communicable area meeting a threshold value condition on the user terminal. Through the embodiment of the invention, the problem that the satellite communication success rate of the terminal and the user experience cannot be ensured under the condition that the terminal does not acquire the satellite-to-ground link state in the related technology can be solved, and the effect of improving the success rate of the satellite communication of the terminal is achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of satellite communication technology, and in particular to a method for determining a satellite communicable area and a user terminal. Background Art

[0002] Supporting satellite communication function on the terminal is a relatively new requirement. For the terminal with built-in antenna, its overall communication performance is not as good as that of the dedicated satellite communication terminal with external antenna. It is very difficult to achieve the same performance as the dedicated satellite communication terminal on the terminal.

[0003] The satellite alignment technology imitates the satellite earth station, and adopts the method of aligning the satellite with the point with the best performance in the radiation direction of the terminal antenna. At this stage, this technology focuses on how to calculate the spatial orientation of the satellite, and how to guide the terminal to align with the satellite in the best direction. Because the antenna is built into the terminal and the structural state is determined, the terminal has only one attitude when aligning with the satellite. When the terminal performs satellite communication based on this "point-to-point" satellite search method, there will be the following problems: there are high requirements for maintaining the terminal attitude, high difficulty in satellite search, and poor balance between the two states of satellite alignment and use; it is impossible to maintain the best performance of uplink and downlink communication at the same time; the terminal does not know the current satellite-to-ground link status, and cannot guarantee successful communication after aligning with the satellite; in non-geosynchronous orbit satellite communication systems, it is very difficult to track communication satellites "point-to-point" and lacks practical application value.

[0004] Although there are some solutions to improve the above problems, these ideas are of certain significance in improving the antenna performance of the terminal and achieving satellite alignment in various postures. However, at the same time, in terms of hardware implementation, higher requirements will be placed on the design and debugging of the terminal antenna, and the space occupied by the antenna inside the terminal structure and the complexity of the overall design will be increased, making it difficult to implement overall. In addition, the existing solutions are still focused on improving the terminal's own capabilities, but for users, it is still unknown whether the satellite-to-ground link status meets the requirements during use. Therefore, even if these improvement solutions can improve the terminal's own capabilities, they cannot guarantee the success rate of satellite communications. For non-geostationary satellite communication systems, these improvement solutions have no obvious effect on alleviating the difficulty of "point-to-point" tracking of communication satellites. Summary of the invention

[0005] The embodiment of the present invention provides a method for determining a satellite communication area and a user terminal, so as to at least solve the problem in the related art that the success rate of satellite communication of the terminal and the user experience cannot be guaranteed when the terminal fails to obtain the satellite-to-ground link status.

[0006] According to an embodiment of the present invention, a method for determining a satellite communicable area is provided, which is applied to a user terminal and includes: based on the received real-time satellite signal, obtaining the signal transceiver capabilities of the satellite and the space-ground path loss; according to the signal transceiver capabilities of the satellite and the space-ground path loss, and combining the signal performance data received by the user terminal, determining a threshold value that meets the requirements of the current communication link; according to the threshold value, displaying the satellite communicable area that meets the threshold conditions on the user terminal.

[0007] According to another embodiment of the present invention, a user terminal is provided, including: an acquisition module, configured to obtain the signal transceiver capabilities of the satellite and the space-ground path loss based on the received real-time satellite signal; a determination module, configured to determine a threshold value that meets the requirements of the current communication link according to the signal transceiver capabilities of the satellite and the space-ground path loss, and combining the signal performance data received by the user terminal; a display module, configured to display the satellite communicable area that meets the threshold conditions on the user terminal according to the threshold value.

[0008] According to still another embodiment of the present invention, a computer-readable storage medium is further provided. A computer program is stored in the computer-readable storage medium, wherein the computer program is configured to execute the steps in any one of the above method embodiments when running.

[0009] According to still another embodiment of the present invention, an electronic device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0010] Through the above embodiments of the present invention, according to the obtained threshold value, the satellite communicable area that meets the conditions is determined, converting the traditional "point-to-point" satellite search method into a "point-to-face" satellite search method, reducing the satellite search difficulty; in addition, the threshold value is determined based on the signal transceiver performance data of the satellite, the space-ground path loss, etc., that is, the terminal side determines the satellite communicable area considering the space-ground link state. In this way, the terminal user can master the real-time situation of the satellite communicable area, reduce the satellite search difficulty for the user, and improve the user experience. Therefore, the problem in the related art that the satellite communication success rate of the terminal and the user experience cannot be guaranteed when the terminal does not obtain the space-ground link state can be solved, achieving the effect of improving the satellite communication success rate of the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a hardware structure block diagram of a mobile terminal for running the method for determining a satellite communicable area according to an embodiment of the present invention;

[0012] Figure 2It is a flowchart for determining the communicable area of a satellite according to an embodiment of the present invention;

[0013] Figure 3 It is a structural block diagram of a user terminal according to an embodiment of the present invention;

[0014] Figure 4 It is a flowchart for determining the satellite alignment angle area according to an embodiment of the present invention;

[0015] Figure 5 It is a schematic diagram of the relative position between a smart phone and an antenna beam according to an embodiment of the present invention;

[0016] Figure 6 It is a flowchart for identifying communication satellites in a satellite signal strength map according to an embodiment of the present invention;

[0017] Figure 7 It is a schematic diagram of the display and operation of a satellite signal strength map on a terminal according to an embodiment of the present invention;

[0018] Figure 8 It is a flowchart for the method of determining and identifying the satellite alignment angle area according to an embodiment of the present invention;

[0019] Figure 9 It is a schematic diagram of selecting a satellite alignment area according to an embodiment of the present invention;

[0020] Figure 10 It is a flowchart for the method of determining and marking the satellite alignment angle area according to another embodiment of the present invention. Detailed implementation manners

[0021] Currently, there are also some ideas trying to improve the above problems. For example, the mobile phone adopts a multi-antenna switching method, using different antennas to adapt to different postures. Or an array antenna is used to improve the directivity and achieve the purpose of adjustable radiation angle. Or some strategies are adopted to adjust the radiation pattern within a certain range. These ideas have certain significance in improving the performance of mobile phone antennas and achieving alignment with satellites in multiple postures. However, in terms of hardware implementation, they will pose higher requirements for the design and debugging of mobile phone antennas. At the same time, they also increase the occupied space of the internal antennas of the mobile phone structure, increase the overall design complexity, and generally have a greater implementation difficulty. At the same time, for non-geostationary satellite communication systems, these improvement schemes do not have an obvious effect on alleviating the difficulty of satellite tracking.

[0022] In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1It is a hardware block diagram of a mobile terminal for the method of determining the communicable area of an operating satellite according to an embodiment of the present invention. As Figure 1 shown, the mobile terminal may include one or more ( Figure 1 only one is shown in Figure 1 ) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Among them, the above-mentioned mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 the structure shown in Figure 1 is only schematic and does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may further include more or fewer components than

[0024] shown in

[0025] The memory 104 can be used to store computer programs. For example, software programs and modules of application software, such as the computer program corresponding to the method for determining the communicable area of a satellite according to an embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above-mentioned method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some embodiments, the memory 104 may further include a memory remotely provided with respect to the processor 102, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0026] In the traditional satellite communication mode, the satellite is located in the geosynchronous orbit, and there are multiple ground stations on the ground, and their antennas point to the direction where the satellite is located. The user terminal accesses the satellite communication link by accessing the ground station. With the development of technology, satellite communication systems operating in medium and low Earth orbits have also emerged, and there is a trend of handheld communication terminals for ground equipment (special satellite communication equipment).

[0027] The appearance of a dedicated satellite communication terminal is relatively similar to that of a traditional terrestrial mobile communication terminal. However, compared with the appearance of current smartphones, the characteristics of the appearance of smartphones are that the body is thin and an internal antenna is used, while the dedicated satellite communication terminal uses an external antenna. The external antenna can achieve a larger gain and can even adjust the antenna pointing, which brings great convenience to the dedicated satellite communication terminal in terms of signal transceiver and attitude adjustment. The internal antenna not only has a low gain, but also the adjustment of the antenna pointing needs to be linked with the attitude of the smartphone. Such defects result in many limitations when smartphones use satellite communication functions.

[0028] Based on the requirement of supporting satellite communication functions on smartphones and the current situation that current smartphones supporting satellite communication are restricted during the satellite communication process, in the embodiments of the present invention, a method for determining the satellite communicable area running on the above-mentioned mobile terminal is provided. This method can achieve a breakthrough in the "point-to-point" satellite pointing method in traditional satellite communication technologies and overcome the problems of current smartphones supporting satellite communication being restricted during the satellite communication process. Figure 2 It is a flowchart of determining the satellite communicable area according to an embodiment of the present invention. This method is applied to a user terminal (i.e., the terminal), such as Figure 2 shown, and this process includes the following steps:

[0029] Step S202, based on the received real-time satellite signal, obtain the signal transceiver ability of the satellite and the space-ground path loss;

[0030] Step S204, according to the signal transceiver ability of the satellite and the space-ground path loss, and combined with the signal performance data received by the user terminal, determine the threshold value that meets the requirements of the current communication link;

[0031] In this embodiment, when the user turns on the satellite communication function on the mobile phone (i.e., the user terminal) outdoors, on the premise that the mobile phone locates and receives the communication satellite signal, at least the following satellite information can be obtained according to the received real-time satellite signal: the signal transceiver ability of the satellite, the satellite orbit parameters, the mobile phone location information; and the received signal is obtained through the radio frequency receiver in the mobile phone: the downlink carrier-to-temperature ratio [C / T] d , that is, obtain the signal performance data received by the user terminal.

[0032] Among them, the signal transceiver ability of the satellite, that is, the radio wave signal transceiver ability of the satellite, includes: the maximum effective isotropic radiated power (Equivalent Isotropically Radiated Power, EIRP) value of the satellite [EIRP max s 、the maximum figure of merit (G / T) value of the satellite [G / T max ​​s The on-satellite demodulation temperature ratio (C / T) threshold of the satellite [C / T thres s ;

[0033] The satellite orbit parameters include: inclination, ascending node, descending node, altitude, sub-satellite point, period;

[0034] The mobile phone location information (i.e., the user terminal location information) includes: longitude, latitude, altitude.

[0035] In this embodiment, the space-ground path loss is determined based on the above satellite orbit parameters and mobile phone location information, including:

[0036] Calculate the space-ground line-of-sight distance according to the satellite orbit parameters and the mobile phone location, and determine the space-ground path loss according to the space-ground line-of-sight distance, where the space-ground path loss includes the space-ground downlink path loss and the space-ground uplink path loss.

[0037] If the user terminal does not obtain the space-ground link state, it cannot guarantee whether satellite communication can be established. Under adverse conditions, even if the user terminal is aligned with the satellite, the space-ground link state does not necessarily meet the conditions for communication establishment; in some cases, even if the direction of the satellite aligned by the user terminal deviates within a certain range, the space-ground link state can still meet the threshold conditions for communication establishment. Therefore, satellite pointing that is not based on the space-ground link state cannot accurately reflect the possibility of satellite communication establishment, just as if a regular mobile phone does not have a signal bar display function, the user does not know whether the current network situation can support normal communication. In this state, whether the communication between the intelligent terminal and the satellite can succeed can only wait for the feedback from the satellite or the other user. For a user terminal that only supports one-way message sending, the user not only cannot know the possibility of successful sending in advance, but also cannot know whether the message has been successfully sent afterwards. This situation is equivalent to: if a mobile phone in a mobile network does not have a signal display and also does not have a sending receipt function, then after the user sends a text message, the user will not know whether the sending is successful. For a mobile phone that supports two-way communication, although the user can judge whether it is successful through the feedback from the base station after sending. But there is still no way to know the current link situation before sending. In this embodiment, when obtaining the threshold value, the signal transceiver performance of the satellite, the space-ground path loss, etc. are considered, so that the terminal side determines the satellite communicable area considering the space-ground link state. In this way, the problem that the terminal cannot guarantee the communication success rate due to not obtaining the space-ground link state can be avoided.

[0038] Step S206, according to the threshold value, display the satellite communicable area that meets the threshold value conditions on the user terminal.

[0039] ​In step S204 of this embodiment, determining the threshold value that meets the requirements of the current communication link includes: based on the received real-time satellite signal, obtaining the signal transceiver capabilities of the satellite, the satellite-ground downlink path loss, and the satellite-ground uplink path loss, and combining the signal performance data received by the user terminal to determine the uplink threshold value that meets the requirements of the current communication link; and / or, based on the satellite signal, obtaining the signal transceiver capabilities of the satellite, the satellite-ground downlink path loss, and combining the signal performance data received by the user terminal and the signal transceiver capabilities of the user terminal to determine the downlink threshold value that meets the requirements of the current communication link.

[0040] In this embodiment, the signal performance of the user terminal transceiver includes: the signal performance transmitted by the user terminal and the signal performance received by the user terminal, both of which are real physical quantities;

[0041] The signal performance transmitted by the user terminal is: the physical attributes of the radio wave signal transmitted by the user terminal in the direction of the satellite, for example: the effective isotropic radiated power value [EIRP] of the user terminal in the line-of-sight direction of the satellite e ;

[0042] The signal performance received by the user terminal is: the physical attributes of the radio wave signal transmitted by the satellite and received by the user terminal receiver, for example: the downlink carrier-to-temperature ratio [C / T] mentioned above d 。

[0043] In this embodiment, the radio wave signal transceiver capabilities of the user terminal (referred to as the signal transceiver capabilities of the user terminal) are the inherent attributes of the user terminal, including: the maximum EIRP value [EIRP max e 、the maximum G / T value [G / T max e 、the demodulation threshold value [C / T thres at the feeder point of the user terminal e 。

[0044] In step S206 of this embodiment, displaying the satellite communication available area that meets the threshold condition on the user terminal includes: displaying the satellite communication available area that meets the threshold condition on the user terminal through the satellite signal strength map.

[0045] Specifically, according to the uplink threshold value, display the satellite communication available area that meets the uplink threshold condition on the user terminal through the satellite signal strength map; and / or, according to the downlink threshold value, display the satellite communication available area that meets the downlink threshold condition on the user terminal through the satellite signal strength map.

[0046] ​​Satellite communication currently uses the uplink and downlink frequency division method. The antenna of a mobile phone is generally an omnidirectional antenna. It is very difficult to make the radiation patterns of different frequency bands exactly the same, and the directions of the maximum gain points of the receiving and transmitting frequency bands may be different. Especially when different antennas are used for the satellite transmitting and receiving frequency bands of the mobile phone, the directions of the maximum gain points of the receiving and transmitting frequency bands will be significantly different, and it is almost impossible to ensure the consistency of the optimal directions of the receiving and transmitting antennas in practical applications. Therefore, if precise satellite alignment is required for the uplink, the downlink performance is likely not to be optimal, and vice versa. Therefore, for those with two-way communication requirements, it is impossible to balance the performance of both directions. In the embodiment of the present invention, for each parameter of the uplink and downlink, the satellite communication areas that meet the uplink threshold conditions and the satellite communication areas that meet the downlink threshold conditions are calculated respectively. Thus, when the user selects the communication area, the user can comprehensively consider the uplink and downlink antenna performances to achieve the balance of the uplink and downlink antenna performances.

[0047] After step S206 of this embodiment, the method further includes: performing real-time two-way communication in the communication area that simultaneously meets the uplink threshold conditions and the downlink threshold conditions.

[0048] In one embodiment, the method further includes: obtaining satellite orbit parameters and user terminal location information according to the real-time satellite signal, determining the position of the satellite relative to the attitude of the user terminal according to the satellite orbit parameters and the user terminal location information, and projecting the position onto the satellite signal strength map of the user terminal in the form of a marker point. In the case of multiple satellites, multiple (satellite) marker points are projected in the satellite signal strength map. When the attitude of the user terminal changes, the satellite marker points can change in the opposite direction in the signal strength map.

[0049] The above embodiments of the present invention can also be applied to non-geostationary orbit satellites. For non-geostationary orbit satellites, as the real-time satellite orbit changes, the size and position of the satellite communication area may change accordingly.

[0050] For non-geostationary orbit satellites, the satellite signal strength map also shows the movement curve of the satellite trajectory relative to the attitude of the user terminal. In one embodiment, each of the communication areas includes one or more threshold contour circles surrounded by threshold contour lines, and a plurality of nested general contour circles surrounded by multiple general contour lines within the threshold contour circles (reference can be made to Figure 7 ); among them, the difference between the smaller general contour circle and the threshold contour circle is larger.

[0051] Wherein, the difference is the difference between the effective isotropic radiated power value corresponding to the threshold equal-value circle and the effective isotropic radiated power value corresponding to the general equal-value circle; or, the difference between the figure of merit value corresponding to the threshold equal-value circle and the figure of merit value corresponding to the general equal-value circle, and this difference can be preset according to requirements; the communicable area decreases as the difference increases, and the signal strength of the antenna increases as the difference increases.

[0052] In one embodiment, the determination of the uplink threshold value [EIRP thres e , includes: obtaining the downlink carrier-to-temperature ratio [C / T] d through a radio frequency receiver, and obtaining the maximum effective isotropic radiated power value [EIRP max , the maximum figure of merit value [G / T max , and the on-board demodulation carrier-to-temperature ratio threshold value [C / T thres s based on the real-time satellite signal; based on the maximum effective isotropic radiated power value [EIRP max , the maximum figure of merit value [G / T max , the satellite downlink path loss [L] d , and combining the downlink carrier-to-temperature ratio value [C / T] d , the figure of merit value [G / T] of the user terminal in its position direction in the current environment e , to determine the current figure of merit value [G / T] of the satellite s ; based on the current figure of merit value [G / T] of the satellite s , the satellite uplink path loss [L] u , and the on-board demodulation carrier-to-temperature ratio threshold value [C / T thres s , to obtain the effective isotropic radiated power threshold value [EIRP thres e that meets the requirements of the current uplink communication link, and determine the effective isotropic radiated power threshold value [EIRP thres e as the uplink threshold value.

[0053] Wherein, [G / T] e is determined based on the receiving antenna pattern of the user terminal, the equivalent noise temperature of the receiving system, and the angle of the satellite relative to the user terminal.

[0054] The maximum effective isotropic radiated power value [EIRP max , the maximum figure of merit value [G / T max , and the on-board demodulation carrier-to-temperature ratio threshold value [C / T thres ​​​​​​s is a parameter reflecting the signal transceiver ability of the satellite, where [EIRP max is the maximum effective isotropic radiated power value of the on-board antenna; [G / T max is the maximum figure of merit value of the satellite.

[0055] In one embodiment, determining the current figure of merit value of the satellite includes: based on the downlink carrier-to-temperature ratio [C / T] d , the figure of merit value [G / T e of the user terminal in its position direction in the current environment, and the satellite-ground downlink path loss [L] d , determining the current effective isotropic radiated power value [EIRP] s of the satellite; based on the difference between the maximum effective isotropic radiated power value [EIRP max and the current effective isotropic radiated power value [EIRP] s of the satellite, determining the difference between the maximum figure of merit value [G / T max and the current figure of merit value [G / T] s of the satellite; based on the maximum figure of merit value [G / T max , the difference between the maximum figure of merit value [G / T max and the current figure of merit value [G / T] s of the satellite, obtaining the current figure of merit value of the satellite.

[0056] In one embodiment, determining the downlink threshold value meeting the requirements of the current communication link includes: according to the real-time satellite signal, obtaining the satellite-ground downlink path loss; and combining the downlink carrier-to-temperature ratio and the figure of merit value [G / T e of the user terminal in its position direction in the current environment to determine the current effective isotropic radiated power value of the satellite; according to the current effective isotropic radiated power value [EIRP] s of the satellite, the satellite-ground downlink path loss [L] d , and combining the demodulation carrier-to-temperature ratio threshold value [C / T thres e at the feeder point of the user terminal, determining the figure of merit threshold value of the user terminal meeting the requirements of the downlink communication link, and determining the figure of merit threshold value as the downlink threshold value. Among them, [L] d can be determined according to the real-time satellite signal received by the user terminal, and since the direction of the user terminal is known at this time, [G / T] e is also a known quantity.

[0057] ​In one embodiment, after the communicable area of the satellite that meets the uplink threshold condition is displayed on the user terminal, the method further includes: according to the selected communicable area, instructing the user to enter the selected communicable area through the user terminal, where the instruction method includes at least one of the following: text, voice prompt, and graphical indication.

[0058] Instructing the user to enter the selected communicable area through the user terminal includes: instructing the user to move by rotating the three axes of the three-dimensional coordinate system on the user terminal.

[0059] Through the above steps, according to the obtained threshold value, the communicable area of the satellite that meets the conditions is determined, and the traditional "point-to-point" satellite searching method is converted into a "point-to-surface" satellite searching method, reducing the difficulty of satellite searching; in addition, the threshold value is determined based on the signal transmission and reception capabilities of the satellite, the space-ground path loss, etc., that is, the terminal side determines the communicable area of the satellite considering the space-ground link state. In this way, the terminal user can master the real-time status of the communicable area of the satellite, reduce the difficulty of satellite searching for the user, and improve the user experience. Therefore, it can solve the problems in the related art that the satellite communication performance of the terminal cannot be guaranteed and the user experience is poor when the terminal does not obtain the space-ground link state, and achieve the effect of improving the success rate of terminal satellite communication.

[0060] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0061] In this embodiment, a user terminal is further provided. The user terminal is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that can implement a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0062] Figure 3 is a structural block diagram of a user terminal according to an embodiment of the present invention. As Figure 3 shown, the user terminal includes: an acquisition module 10, a determination module 20, and a display module 30.

[0063] An acquisition module 10, configured to acquire the signal transceiver capability of a satellite and the space-ground path loss based on the received real-time satellite signal;

[0064] A determination module 20, configured to determine a threshold value that meets the requirements of the current communication link according to the signal transceiver capability of the satellite and the space-ground path loss, and in combination with the signal reception performance data of the user terminal;

[0065] A display module 30, configured to display, on the user terminal, a satellite communication available area that meets the threshold condition according to the threshold value.

[0066] It should be noted that the above-mentioned modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to this: all the above-mentioned modules are located in the same processor; or, the above-mentioned modules are respectively located in different processors in any combination form.

[0067] For the convenience of understanding the technical solution provided by the present invention, the following will be elaborated in detail with reference to the embodiments of specific scenarios.

[0068] In the technical development direction of the space-ground integrated communication method, there is a need to support satellite communication functions on user terminals (hereinafter introduced by taking a smart phone (referred to as a mobile phone) as an example). However, the characteristics of the appearance of a smart phone are that the body is thin and an internal antenna is used, which is completely opposite to that of a dedicated satellite communication terminal. Therefore, it is very difficult to achieve the same performance on a smart phone. Due to the limitation of the appearance of the smart phone, there is no external antenna like a dedicated satellite communication terminal, and it is necessary to adjust the posture of the mobile phone to aim at the satellite. The first technology that comes to mind and is applied is to align the best direction of the smart phone antenna with the satellite, that is, the "point-to-point" satellite aiming technology. This technology is to obtain the direction of the maximum gain point of the smart phone antenna, calculate the satellite aiming angle according to the positions of the satellite and the smart phone, and guide the smart phone to adjust its posture to achieve the best direction to align with the satellite.

[0069] In the traditional "point-to-point" satellite technology, there is only one option for smartphones to align with satellites, that is, the best point in the radiation direction of the smartphone antenna. Because for smartphones using built-in antennas, the directivity of the antenna is not adjustable relative to the smartphone, and the process of satellite searching is the process of adjusting the smartphone's posture. Once the smartphone antenna is aligned with the satellite, the smartphone posture needs to remain stationary. The reason is that the offset or shaking of the fuselage will cause the linkage of the best direction of the antenna, which may lead to a decrease in link performance or even communication interruption. Therefore, in some special scenarios (such as outdoor activities), a fixed bracket is also required to keep the smartphone posture stationary. Obviously, the traditional "point-to-point" satellite technology is more suitable for geostationary orbit systems, but if a satellite communication system uses non-geostationary orbit satellites, it is necessary to track the satellite's trajectory in a timely manner. In this way, in the above special scenarios, users are also required to carry equipment that can track satellite trajectories, which will put higher requirements on the user's use process.

[0070] Existing solutions to improve traditional satellite alignment technology include: smartphones use multi-antenna switching to adapt to different postures of smartphones based on different optimal directions of different antennas; or use antenna arrays to enhance directivity and achieve adjustable beam radiation angles; or use some strategies to adjust the antenna pattern within a certain range.

[0071] Although the above solutions to improve traditional satellite alignment technology have their merits, they all focus on adjusting the performance of smartphone antennas, which will inevitably increase the requirements for antenna design and debugging and the complexity of the overall device design. In addition, these solutions do not involve the calculation of the satellite-to-ground link, so they still cannot show users the real-time satellite signal status. At the same time, for non-geostationary satellite communication systems, they cannot reduce the difficulty of satellite tracking.

[0072] When a user turns on the satellite communication function on a smartphone outdoors, an embodiment of the present invention provides a smartphone supporting the satellite communication function and a method for determining a satellite angle area applied to the smartphone, which is used for uplink and downlink communications between the smartphone and a satellite.

[0073] The method for determining the satellite angle area mainly includes two parts: generating a satellite signal strength map and calculating the satellite-to-ground link; that is, generating a satellite signal strength map displayed on the smartphone based on the data of the satellite antenna receiving pattern and the transmitting pattern of the smartphone; and then converting it into EIRP and G / T data of the smartphone in combination with the RF performance at the smartphone antenna feed source, calculating the satellite-to-ground link status, and then marking the satellite angle area in the satellite signal strength map, wherein the satellite signal strength map includes: a spherical uplink signal strength map and / or a spherical downlink signal strength map.

[0074] The following is a specific description of the method for determining the satellite pointing angle area. Figure 4 It is a flowchart of the method for determining the satellite pointing angle area according to an embodiment of the present invention. As Figure 4 shown, the method includes the following steps:

[0075] Step S402: Test the satellite antenna pattern of the smart phone, and obtain the uplink gain data and downlink gain data of the smart phone antenna on the spherical surface according to the satellite antenna pattern.

[0076] Step S404: Use the uplink gain data and downlink gain data as basic data to generate a spherical satellite signal strength map based on the EIRP and G / T values.

[0077] In this embodiment, the uplink signal strength map and the downlink signal strength map in the satellite signal strength map can be displayed in the same spherical map, or can be separately displayed in a spherical map.

[0078] Step S406: Synthesize various aspects of information to obtain information such as the satellite angle and the satellite-earth distance, and use the space loss introduced by the satellite-earth distance. Then, in combination with the transceiver performance of the smart phone and the transceiver performance of the satellite, determine the EIRP threshold value and G / T threshold value on the smart phone side that meet the requirements of the current communication link. Among them, the EIRP threshold value is used as the uplink threshold value, and the G / T threshold value is used as the downlink threshold value.

[0079] In the process of determining the requirements of the current communication link, the link state calculation of the satellite-earth radio frequency signal is involved, that is, determining the signal gain and loss of the uplink and downlink. This determination process includes: taking the C / T (i.e., C / N0) value of the signal received by the smart phone as a reference, combining the G / T value of the smart phone at this angle, and the satellite-earth downlink path loss, and inversely calculating the current on-board EIRP value. Then, based on this, the current on-board G / T value is calculated. Using the on-board G / T value and the on-board demodulation threshold, combined with information such as the satellite-earth uplink path loss, the ERIP threshold value required by the smart phone, that is, the uplink threshold value, can be obtained. On the other hand, according to the current on-board EIRP value, the smart phone demodulation threshold and the downlink link gain and loss, the G / T threshold value required by the smart phone, that is, the downlink threshold value, can be obtained.

[0080] The following is the theoretical basis and calculation process of the satellite-earth link calculation. In the following content, the symbol [] represents the logarithmic form of the data in the square brackets: for example, [A]=10logA.

[0081] Satellite-earth downlink link formula: [C / T] d =[EIRP] s -[L] d +[G / T] e Formula (1)

[0082] Where: [C / T] d is the downlink C / T (carrier-to-temperature ratio) value, which, after being converted to C / kT, becomes the commonly used C / N0 (carrier-to-noise ratio) in smartphone RF design (where k is the Boltzmann constant 1.380649×10 -23 J / K). When it is greater than the demodulation threshold [C / T thres e of the smartphone, the downlink can meet the communication requirements.

[0083] [EIRP] s is the EIRP of the spaceborne antenna in the line-of-sight direction with the mobile phone. It is an inherent property of the satellite at this angle. After obtaining satellite information, the maximum effective isotropic radiated power value of the spaceborne antenna can be determined: [EIRP max . The deviation degree of the mobile phone from the satellite beam center can be obtained from the difference between the current effective isotropic radiated power value ([EIRP] s ) of the satellite in the line-of-sight direction and [EIRP max . Or the EIRP ([EIRP] max ) of the satellite in the line-of-sight direction can be obtained based on [EIRP s and the deviation degree from the satellite beam center. To improve the accuracy, corrections can be made to the elevation angle deviation and distance deviation introduced by the atmospheric refraction factor during the calculation of the line-of-sight distance between the satellite and the mobile phone.

[0084] [L] d is the satellite-to-ground path loss, including free space path loss [L f d , polarization loss [L p d , atmospheric loss [L a d , and additional loss [L c d introduced by the influence of rain, fog, snow, clouds, etc. It can be obtained respectively according to the free space loss formula, atmospheric loss table, and models of the influence of rain, fog, snow, clouds, etc.

[0085] [G / T] e ​​​​​$G / T$ is the quality factor of the mobile phone in the satellite line-of-sight direction (i.e., the quality factor of the user terminal in its position direction in the current environment). The receiving antenna gain $G$ is an inherent performance of the mobile phone and can be obtained through the transformation of antenna pattern data. For the satellite ground receiving system, the equivalent noise temperature $T$ of the receiving system includes the total contribution of the noise temperatures of the antenna, feeder, and LNB, etc. For a smart phone, if the antenna feed point is taken as the boundary, from the antenna to the feed point, it only includes the equivalent noise temperature of the antenna. Since the mobile phone antenna is a passive antenna and approximately an omnidirectional antenna, $T$ can be taken as the ambient temperature. From the perspective of the radio frequency signal received by the mobile phone, $T$ is the main factor for generating the received signal noise floor $n = kTB$, and $T$ is also the ambient temperature. The receiving performance below the feed point is an inherent performance of the mobile phone, and the $C / T$ demodulation threshold of the mobile phone can be converted to the antenna feed point. Therefore, for any radiation direction of the mobile phone, $G / T$ can be regarded as a function of the ambient temperature.

[0086] Satellite uplink formula: $[C / T]$ u $=[EIRP]$ e $-[L]$ u $+[G / T]$ s (Formula 2)

[0087] Where: $[C / T]$ u is the uplink $C / T$ value. When it is greater than the demodulation threshold $[C / T$ thres s (i.e., the satellite demodulation carrier temperature ratio threshold value), the uplink can meet the communication requirements. The satellite equipment demodulation threshold can be determined after obtaining satellite information.

[0088] [EIRP] e is the EIRP of the mobile phone transmission in the satellite line-of-sight direction and can be obtained through the transformation of the mobile phone transmission pattern data. Here, corrections can also be made for the elevation angle deviation and distance deviation introduced by atmospheric refraction.

[0089] [L] u is the satellite uplink path loss, including free space path loss $[L$ f u , polarization loss $[L$ p u , atmospheric loss $[L$ a u and additional losses $[L$ c u introduced by the influence of rain, fog, snow, clouds, etc. It can be obtained according to the free space loss formula, atmospheric loss table, and models of the influence of rain, fog, snow, clouds, etc. respectively.

[0090] [G / T] sis the quality factor of the satellite in the line-of-sight direction with the mobile phone. It is an inherent property of the satellite at this angle. After obtaining satellite information, the maximum G / T value of the satellite can be obtained: [G / T max , and the deviation degree of the satellite beam center can be known according to the difference between the quality factor of the satellite in the line-of-sight direction ([G / T] s ) and [G / T max . Or the quality factor of the satellite in the line-of-sight direction ([G / T] max ) can be obtained according to [G / T s and the deviation degree of the satellite beam center.

[0091] The following is an explanation of the relationship between the deviation of the satellite beam center and the resulting deviation values of the on-board antenna EIRP and G / T:

[0092] A directional antenna is used on the satellite. For any pair of earth-directed beams of the satellite, the same beam width, beam shape, and the same earth-directed angle need to be achieved in both the transmission and reception aspects. Generally, the ground equipment will not exactly be at the maximum gain point of the beam (such as the beam center). Therefore, there is a deviation value between the gain of the satellite beam at a certain earth-directed angle and its maximum gain. And due to the same beam characteristics, the difference value is the same for both the receiving and transmitting directions, that is, the effect of the antenna pointing loss on EIRP and G / T is the same.

[0093] Antenna pointing loss:

[0094] Among them: [L p is the antenna pointing loss (dB); Δθ is the antenna pointing deviation (°); is the antenna half-power beam width (°).

[0095] It can be seen that the loss caused by the deviation of the antenna pointing is only related to the deviation angle.

[0096] Figure 5 is a schematic diagram of the relative position of the smart phone and the antenna beam according to an embodiment of the present invention. As Figure 5 shown, within a beam, for the [EIRP]s and [G / T]s obtained by the smart phone due to the deviation angle from the beam center (the direction of the maximum EIRP and G / T), the difference value is the same.

[0097] According to the above theoretical basis, in the embodiment of the present invention, various types of information are fully utilized and theoretical derivation is adopted to obtain the uplink and downlink threshold values; the relationship between the pointing loss (the difference between the current value and the maximum value) generated by the deviation degree of the smart phone from the satellite beam center in terms of on-board EIRP and G / T is used to associate the uplink and downlink path losses.

[0098] Figure 6is a flowchart of a method for identifying communication satellites in a satellite signal strength map according to an embodiment of the present invention. As Figure 6 shown, the method includes the following steps:

[0099] Step S602, the smart phone obtains the following information according to the received satellite signal: satellite orbit parameters, positioning information of the smart phone (equivalent to the above-mentioned mobile phone location information);

[0100] Step S604, obtain satellite orbit parameters and positioning information according to the satellite signal, calculate the satellite elevation angle, azimuth angle and satellite-ground distance according to the satellite orbit parameters and positioning information, and make elevation correction for the effect of atmospheric refraction. Among them, the satellite orbit parameters (equivalent to the orbit information in the above embodiment) include: inclination angle, ascending node, descending node, altitude, sub-satellite point, period; the positioning information includes: longitude, latitude, altitude.

[0101] In one embodiment, for non-geostationary satellites, the running trajectory of the satellite orbit relative to the mobile phone positioning information can be calculated based on information such as the orbit inclination angle, ascending node, and period, and the current angle can be determined. Furthermore, the running trajectory of the satellite can be displayed on the user terminal, allowing the user to pre-understand the satellite running trend and timely correct the mobile phone attitude to maintain communication.

[0102] Step S606, calculate the free space path loss [L f d , polarization loss [L p d , atmospheric loss [L a d and additional loss [L c d , to obtain the satellite downlink path loss [L] d . Similarly, the satellite uplink path loss [L] u can be obtained.

[0103] Step S608, calculate the position of the satellite relative to the mobile phone attitude according to the satellite elevation angle and azimuth angle, and display the position of the satellite relative to the mobile phone attitude in the smart phone.

[0104] Displaying the position of the satellite relative to the mobile phone attitude in the smart phone includes: projecting the position onto the satellite signal strength map of the smart phone to form a marked point, that is, the satellite marked point.

[0105] In this embodiment, for the case of receiving multiple communication satellites simultaneously, the uplink threshold value can have multiple satellite marked points appear on the uplink signal strength map and the downlink signal strength map, for the user to select a satellite at an appropriate angle for communication.

[0106] ​​​​In this embodiment, when the posture of the mobile phone changes, the satellite identification point can change in the opposite direction in the satellite signal strength map. For non-geostationary satellites, the curve of the satellite trajectory relative to the mobile phone posture is projected onto the satellite signal strength map, and the satellite identification point is the current position. When the mobile phone posture changes, the satellite trajectory and the satellite identification point can change in the opposite direction in the signal strength map.

[0107] In this embodiment, the user can manually operate the satellite signal strength map, for example: rotate the satellite signal strength map from any angle. When the user focuses on a certain area, the area can be rotated to the best area of the mobile phone screen. The rotated angle is recorded and used to synchronously rotate the position of the satellite identification point or the satellite trajectory curve on the signal strength map. The angle of the satellite relative to the mobile phone must be accurately reflected in the position of the satellite identification point on the satellite signal strength map.

[0108] Through the above steps, the position of the satellite relative to the mobile phone posture is calculated based on the obtained satellite angle and projected onto the spherical satellite signal strength map of the mobile phone to form an identification point. It can enable the user to intuitively see the position of the satellite relative to the mobile phone and also know the position of the satellite relative to the communicable area. When the mobile phone posture changes, the satellite identification point can move in the opposite direction in the map. When the satellite identification point falls within the above-mentioned equal value circle, that is, the communicable area, the signal requirements for satellite communication can be met.

[0109] Figure 7 It is a schematic diagram of the display and operation of the satellite signal strength map according to an embodiment of the present invention. The uplink signal strength map can be a spherical map displayed on the Figure 7 smartphone display interface shown in the figure. The spherical data uses the [EIRP]e data of the smartphone (determined by the uplink gain data), that is, the product of the transmit power at the feed point and the gain of the transmit antenna at each point on the sphere. Similarly, the downlink signal strength map can also be a spherical map displayed on the Figure 7 smartphone interface shown in the figure. The spherical data uses the [G / T]e data of the mobile phone (determined by the downlink gain data), where G is the gain of the receiving antenna at each point on the sphere (since T is the ambient temperature, the data on this map will change slightly with the change of the outdoor ambient temperature). The coordinates of the satellite signal strength map are associated with the smartphone coordinates. By default, the three-dimensional coordinate axes of the satellite signal strength map can be completely parallel to the three-dimensional coordinate axes of the mobile phone. When the user turns on the satellite communication function, the satellite signal strength map can be seen to be stationary on the smartphone screen. If the posture of the smartphone changes, the signal strength map on the screen remains unchanged.

[0110] In this embodiment, the user can manually zoom in or out the size of the satellite signal strength map, such as Figure 7As shown in the third figure from left to right. By shrinking the signal strength map, it is convenient for users to master the angular position of the satellite relative to the mobile phone. By enlarging the signal strength map, it is convenient for users to accurately identify the area of concern after zooming in.

[0111] Step S408, mark contour lines on the satellite signal strength map according to the uplink threshold value and / or downlink threshold value to form one or more contour circles, and obtain one or more areas that meet the uplink threshold value and / or downlink threshold value.

[0112] Specifically, when obtaining the uplink threshold value [EIRP thres e (that is, the effective isotropic radiated power threshold value) according to the satellite-ground uplink formula, where [C / T u and [L u in formula (2) are known, and [G / T s needs to be obtained. The obtaining of [G / T s needs to be obtained through the satellite-ground downlink formula. Specifically:

[0113] The smart phone receives the signal [C / T d , the calculated [L d , and the known [G / T e (since the direction of the mobile phone is determined at this time, so [G / T e is known). Based on the above known quantities, the value of [EIRP s in formula (1) is determined. In addition, [EIRP max is also a known quantity, so the difference between [EIRP s and [EIRP max can be determined. And the difference between [G / T s and [G / T max is equal to the above difference. Therefore, [G / T max can be determined according to this difference and [G / T s .

[0114] When obtaining the downlink threshold value [G / T thres e according to the satellite-ground downlink formula, it is necessary to determine [G / T thres e through the known [C / T d , [L thres , and [EIRP]s. e .

[0115] The embodiment of the present invention also provides a method for determining the satellite alignment angle area on the uplink signal strength map. Figure 8 ​​​is a flowchart of a method for determining and identifying the satellite-pointing angle region according to an embodiment of the present invention. In this embodiment, the satellite-pointing angle region is marked on the uplink signal strength diagram, as Figure 8 shown. The method includes the following steps:

[0116] Step S802: Determine the current EIRP value of the satellite: [EIRP] d (i.e., the current effective isotropic radiated power value) according to [C / T] d , the downlink path loss [L] e , and the G / T value of the mobile phone in the current environment in this position direction: [G / T] s . Then, determine the difference between [G / T max and [G / T] s through the difference between the obtained [EIRP max and [EIRP] s . Among them, [C / T] d is obtained by the smart phone according to the received real-time satellite signal; [L] d and [G / T] e are calculated and determined according to the mutual position information between the satellite and the smart phone.

[0117] Step S804: Calculate the current G / T value of the satellite: [G / T] max according to the differences between [G / T max , [G / T s , and [G / T] s . According to [G / T] s , [L] u , and the on-board demodulation C / T threshold value [C / T thres s , the uplink threshold value [EIRP thres e that meets the uplink communication requirements can be obtained.

[0118] Step S806: Mark the points that meet [EIRP thres e on the uplink signal strength diagram. All the points are connected into an isocurve, enclosing one or several regions, which are the satellite-pointing angle regions that meet the uplink communication requirements. These regions can be filled with colors, and within this region, it can be designed to deepen the filling color as the value increases.

[0119] Figure 9 is a schematic diagram of selecting the satellite-pointing region according to an embodiment of the present invention. As Figure 9 shown, by adjusting the attitude of the smart phone, the user can make the selected satellite identification point enter one of the regions to meet the uplink communication requirements. Figure 9 ​​​Two optional satellites, s1 and s2, are shown. s2 is selected, and the result of adjusting the phone's attitude is that s2 enters the satellite acquisition area on the right. Among them, the darker the color of the entered area, the stronger the signal. In the case of multiple selectable areas, the user can select the most suitable area for communication.

[0120] In one embodiment, if there is no point that meets [EIRP thres e on the uplink signal strength map, it indicates that the current environment does not meet the requirements for uplink communication. In this case, the user can be prompted not to transmit blindly and can try again by changing the location or time.

[0121] Figure 10 is a flowchart of a method for determining and marking the satellite acquisition angle area according to another embodiment of the present invention. In this embodiment, the satellite acquisition angle area is marked on the downlink signal strength map, as shown in Figure 10 . The method includes the following steps:

[0122] Step S1002, according to [EIRP] s , [L] d , the demodulation threshold value [C / T thres e at the phone's feed point, the G / T threshold value [G / T thres e that meets the downlink communication requirements can be obtained.

[0123] Step S1004, mark the points that meet [G / T thres e on the downlink signal strength map to form an isocurve, enclosing one or several areas, that is, the satellite acquisition angle area that meets the downlink communication requirements. By adjusting the phone's attitude to make the satellite identification point enter this area, the requirements for downlink communication can be met.

[0124] When the user aligns the satellite in these areas, the communication link requirements can be met. These areas are called communicable areas. Among them, the area formed by the EIRP threshold value is the uplink unidirectional communicable area, the area formed by the G / T threshold value is the downlink unidirectional communicable area, and the intersection of the two areas is the bidirectional communicable area. For unidirectional communication and non-real-time bidirectional communication, the EIRP isocircle (uplink unidirectional communicable area) or the G / T isocircle (downlink unidirectional communicable area) can be selected respectively according to the transmission or reception requirements of the smartphone. For real-time bidirectional communication requirements, it is necessary to select within the intersection area of the EIRP and G / T isocircles, that is, to make a selection within the bidirectional communicable area.

[0125] ​​​​Since the acquisition of the isocircle is based on the received signal, the above-mentioned isocircle is not a definite area, but changes in real time according to the strength of the received signal. Under unfavorable conditions, the isocircle may shrink or even disappear. This can inform the user that satellite communication cannot be established in the current environment, and then remind the user to change the location or time and try again.

[0126] In this embodiment, within one or several regions that meet the uplink threshold value and / or the downlink threshold value, the change in the available color represents the change in the signal strength. For example, the darker the color, the greater the corresponding values of EIRP and G / T, which is equivalent to the greater the signal strength. Within each region that meets the uplink threshold value and / or the downlink threshold value, there are also multiple nested general isocircles surrounded by general contour lines, dividing the region that meets the uplink threshold value and / or the downlink threshold value into multiple regions with different shades of color, so as to express the trend of signal strengthening in the way of gradually deepening color.

[0127] For non-geostationary satellite communication systems, in addition to displaying the current position of the satellite, the operating trajectory of the satellite can also be displayed on the smartphone, and the user can intuitively know the position of the satellite relative to the communicable area during its operation. According to the position information of the satellite, the user can select a suitable area according to the convenience of use.

[0128] For geostationary satellite communication systems, due to the small number of satellites and the long distance between the satellite and the ground, satellite signals may not be received in the initial state, and the isocircle may also not be displayed. At this time, a guiding function can be added, that is, to make the best receiving direction of the smartphone point to the theoretically existing area of the satellite to try to receive satellite signals.

[0129] In this embodiment, the relative position between the smartphone attitude and the satellite is presented in the form of a spherical graph, and this form is selected as the way to guide the user to point to the satellite. Among them, the specific ways to guide the user include auxiliary prompting methods such as text, arrows, and voice prompts. For example: after the user selects the target area, based on the rotation of the three coordinate axes of the smartphone coordinate system, the user is prompted by means of text, arrows, voice, etc. to turn the phone screen to the left (right), turn the phone screen up (down), and keep the screen orientation unchanged while swinging the top of the phone to the left (right).

[0130] Through the above embodiments of the present invention, the traditional "point-to-point" satellite seeking method is improved to a "point-to-plane" or "point-to-multiple-planes" satellite seeking method, which expands the user's selection range, reduces the difficulty of satellite seeking, can change the current situation of blindly "seeking the only satellite alignment angle", and removes the limitations of the traditional satellite seeking method in terms of communication effect, user experience, etc. Using the real-time satellite-ground link conditions as the basis for determining the signal strength, and presenting the optional communication areas to the user in the form of a spherical graph, enabling the user to understand the current communication conditions. At the same time, by providing real-time satellite signal strength information, the user can understand the real-time signal status and know in advance the possibility of successful communication.

[0131] An embodiment of the present invention also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is configured to execute the steps in any one of the above method embodiments when running.

[0132] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: USB flash drive, read-only memory (ROM for short), random access memory (RAM for short), mobile hard disk, magnetic disk or optical disc and other various media that can store computer programs.

[0133] An embodiment of the present invention also provides an electronic device, including a memory and a processor, a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0134] In an exemplary embodiment, the above electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0135] The specific examples in this embodiment may refer to the examples described in the above embodiments and exemplary embodiments, and will not be repeated here.

[0136] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program code executable by the computing device, so that they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order than here, or they can be separately made into individual integrated circuit modules, or multiple modules or steps of them can be made into a single integrated circuit module to implement. In this way, the present invention is not limited to any specific combination of hardware and software.

[0137] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for determining the communicable area of a satellite, characterized in that, Applied to a user terminal, including: Based on the received real-time satellite signal, obtain the signal transceiver capabilities of the satellite and the space-ground path loss; According to the signal transceiver capabilities of the satellite and the space-ground path loss, and in combination with the signal performance data received by the user terminal, determine the threshold value that meets the requirements of the current communication link; According to the threshold value, display the satellite communication available area that meets the threshold value conditions on the user terminal.

2. The method according to claim 1, characterized in that, Determining the threshold value that meets the requirements of the current communication link includes at least one of the following: Based on the received real-time satellite signal, obtain the signal transceiver capabilities of the satellite, the space-ground downlink path loss, and the space-ground uplink path loss, and in combination with the signal performance data received by the user terminal, determine the uplink threshold value that meets the requirements of the current communication link; Based on the real-time satellite signal, obtain the signal transceiver capabilities of the satellite and the space-ground downlink path loss, and in combination with the signal performance data received by the user terminal and the signal transceiver capabilities of the user terminal, determine the downlink threshold value that meets the requirements of the current communication link.

3. The method according to claim 2, characterized in that Displaying the satellite communication available area that meets the threshold value conditions on the user terminal includes: According to the uplink threshold value, display the satellite communication available area that meets the uplink threshold value conditions on the user terminal; and / or, according to the downlink threshold value, display the satellite communication available area that meets the downlink threshold value conditions on the user terminal.

4. The method according to claim 3, wherein After displaying the satellite communication available area that meets the threshold value conditions on the user terminal, the method further includes: Perform real-time two-way communication in the communication available area that simultaneously meets the uplink threshold value conditions and the downlink threshold value conditions.

5. The method according to claim 1, characterized in that The method further includes: Display the satellite communication available area that meets the threshold value conditions on the user terminal through a satellite signal strength map.

6. The method according to any one of claims 1-5, characterized in that Wherein, Each of the communication available areas includes one or more threshold value contour circles surrounded by threshold value contour lines, and the threshold value contour circles include a plurality of nested general contour circles, and the general contour circles are surrounded by general contour lines.

7. The method according to claim 2, wherein The determining of the uplink threshold value that meets the requirements of the current communication link includes: According to the real-time satellite signal, obtain the maximum effective isotropic radiated power value, the maximum figure of merit value, and the on-board demodulation carrier temperature ratio threshold value; Based on the maximum effective isotropic radiated power value, the maximum figure of merit value, and the space-ground downlink path loss, and in combination with the downlink carrier temperature ratio value and the figure of merit value of the user terminal in its position direction in the current environment, determine the current figure of merit value of the satellite; Based on the current figure of merit value of the satellite, the space-ground uplink path loss, and the on-board demodulation carrier temperature ratio threshold value, determine the effective isotropic radiated power threshold value that meets the requirements of the current uplink communication link, and determine the effective isotropic radiated power threshold value as the uplink threshold value.

8. The method according to claim 2, wherein The determining of the downlink threshold value that meets the requirements of the current communication link includes: According to the real-time satellite signal, obtain the space-ground downlink path loss, and in combination with the downlink carrier temperature ratio value and the figure of merit value of the user terminal in its position direction in the current environment, determine the current effective isotropic radiated power value of the satellite; Based on the current effective isotropic radiated power value of the satellite, the satellite-ground downlink path loss, and in combination with the demodulation carrier-to-temperature ratio threshold value at the feeder point of the user terminal, determine the quality factor threshold value of the user terminal that meets the requirements of the downlink communication link, and determine the quality factor threshold value as the downlink threshold value.

9. The method according to claim 5, characterized in that, The method further includes: Based on the real-time satellite signal, obtain the satellite orbit parameters and the user terminal location information, determine the position of the satellite relative to the attitude of the user terminal according to the satellite orbit parameters and the user terminal location information, and project the position onto the satellite signal strength map of the user terminal in the form of an identification point.

10. The method according to claim 1, characterized in that, After the user terminal displays the communicable area of the satellite that meets the uplink threshold condition, the method further includes: According to the selected communicable area, instruct the user to enter the selected communicable area through the user terminal, where the instruction methods include at least one of the following: text, voice prompt, graphic indication.

11. A user terminal, characterized in that, It includes: An acquisition module, configured to acquire the signal transceiver capabilities of the satellite and the satellite-ground path loss based on the received real-time satellite signal; A determination module, configured to determine the threshold value that meets the requirements of the current communication link according to the signal transceiver capabilities of the satellite and the satellite-ground path loss, and in combination with the user terminal received signal performance data; A display module, configured to display the communicable area of the satellite that meets the threshold condition on the user terminal according to the threshold value.

12. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, where the computer program, when executed by a processor, implements the steps of the method described in any one of claims 1 to 10.

13. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method described in any one of claims 1 to 10.

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