Shipborne dual-frequency satellite fusion network controller and dual-frequency fusion satellite communication system

Abstract

The invention discloses a shipborne dual-frequency satellite fusion network controller and a dual-frequency fusion satellite communication system, and relates to the field of communication, and the shipborne dual-frequency satellite fusion network controller comprises a Ka management interface which is used for obtaining satellite finding parameter information of a preset Ka modem; the Ku management interface is used for acquiring satellite finding parameter information of a preset Ku modem; the processing module is used for executing a preset switching logic, determining a switching result based on the preset switching logic when the preset switching logic is executed, and processing the star finding parameter information based on the switching result to obtain a standard protocol parameter; and the ACU interface is used for forwarding the standard protocol parameters to a controller of the dual-frequency antenna. The switching between the Ka baseband network and the Ku baseband network is realized, and the problems that the Ku large-beam rate cannot meet the user requirements and the Ka high-throughput satellite network cannot form global coverage are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of information processing, and particularly to an on-board dual-frequency satellite fusion network controller and a dual-frequency fusion satellite communication system. Background Art

[0002] With the vigorous development of Internet applications, users have put forward new requirements for the stability, availability, and efficiency of the network. The existing "global network" mainly based on the Ku large-beam network can no longer meet the dual demands of users for terminal miniaturization and increasing communication capacity. To improve communication quality and service quality and better serve the needs of the big data network, it is imperative to integrate the Ka high-throughput network into the "global network" to enhance the overall network transmission capacity. The solution of jointly completing global coverage through the Ka, Ku dual-frequency, and multi-baseband system network will be the inevitable direction for a quite long time.

[0003] How to solve the problem that the Ku large-beam rate under the existing "global network" cannot meet the user's needs, while the Ka high-throughput satellite network cannot achieve global coverage. Summary of the Invention

[0004] The main purpose of the present invention is to provide an on-board dual-frequency satellite fusion network controller and a dual-frequency fusion satellite communication system to solve the deficiencies in the related technologies.

[0005] To achieve the above object, according to the first aspect of the present invention, an on-board dual-frequency satellite fusion network controller is provided, including a Ka management interface for protocol communication with a Ka modem; a Ku management interface for protocol communication with a Ku modem; an ACU interface for communicating with a controller of a dual-frequency antenna; and a processing module. The Ka management interface is used to obtain the satellite search parameter information of a preset Ka modem; the Ku management interface is used to obtain the satellite search parameter information of a preset Ku modem; the processing module is used to execute a preset switching logic, wherein when executing the preset switching logic, a switching result is determined based on the preset switching logic, and the satellite search parameter information is processed based on the switching result to obtain standard protocol parameters; the ACU interface is used to forward the standard protocol parameters to the controller of the dual-frequency antenna for the dual-frequency antenna controller to generate a switching instruction based on the standard protocol parameters to control the dual-frequency antenna to perform frequency band switching to achieve satellite search and tracking.

[0006] Optionally, when executing the preset switching logic, the processing module is configured to obtain the current geographical location information and determine whether the current geographical location is within the Ka coverage area; if it is within the Ka coverage area, switch the Ka baseband network to the active network. Among them, if it is within the Ka coverage area, switching the Ka baseband network includes determining the link quality if the current active network is the Ka baseband network; if the current active network is not the Ka baseband network, switch to the Ka baseband network, and after the switching is successful, determine the link quality; if the determination result is that the link is interrupted, determine whether the link is under Ku coverage; if it is within the Ku coverage area, switch the Ku baseband network to the active network; otherwise, reprocess based on the latest current geographical location until the link is restored or within the Ku coverage area. Among them, after successfully switching the Ku baseband network to the active network, wait for a preset duration and determine whether the Ku link is available; if it is not available, perform beam-assisted handover and execute the logic under the Ku baseband network.

[0007] Optionally, when executing the preset switching logic, if it is outside the Ka coverage area, the processing module is configured to determine whether the Ku baseband network is the active network; if it is the active network, execute the logic under the Ku baseband network; if it is not the active network, switch the Ku baseband network to the active network; after switching the Ku baseband network to the active network, wait for a preset duration and determine whether the Ku link is available; if it is not available, perform beam-assisted handover and execute the logic under the Ku baseband network.

[0008] Optionally, when executing the logic under the Ku baseband network, if the current geographical location is within the Ka coverage area, start a countdown; after the countdown ends, determine whether the current Ku link is available; if the current Ku link is available, obtain the latest current location again and determine whether the latest current location is under Ka coverage. If it is under Ka coverage, continue the countdown; after the countdown reaches 0, switch the Ka baseband network to the active network; if the current Ku link is not available, wait for a specified duration and then determine whether the Ku link is available. If it is still not available, directly switch the Ka baseband network to the active network; among them, before the countdown reaches 0, continue to determine whether the Ku link is available.

[0009] Optionally, when executing the preset switching logic, if it is not available, performing beam-assisted handover includes: determining the optimal beam resource based on the current geographical location and the preset beam coverage map; sending a forced handover instruction for the optimal beam resource to the Ku modem to switch the beam.

[0010] Optionally, when executing the preset switching logic, the processing module is used to determine the optimal beam resources based on the current geographical location and the preset beam coverage map, including: obtaining the pre-configured satellite beam information from the Ku modem; comparing the satellite beam information with the preset beam information to determine the intersection of the satellite beam information and the preset beam information, and storing the beam information in the intersection into the first storage table; determining the beam that matches the current position from the first storage table to obtain the first target beam information and storing the first target beam information in the second storage table, where the beam that matches the current position is determined from the beam coverage map; determining the beam information with the highest priority in the second storage table, and switching the Ku modem to the beam information with the highest priority; waiting for a specified duration and then determining whether the Ku link is available; if available, enter the switching logic of the Ku modem itself.

[0011] Optionally, when the processing module is used to determine whether the Ku link is available after waiting for a specified duration when executing the preset switching logic, if it is not available, the current beam information is stored in the third storage table; obtaining the latest current geographical location, obtaining the beam that matches the latest current position from the first storage table to get the second target beam, and updating the second storage table based on the second target beam; deleting the beam with the same beam information as that in the third storage table from the updated second storage table to get the latest second target beam and form the latest second storage table; if the latest second storage table is not empty, determining the beam information with the highest priority from the latest second storage table and switching the Ku modem to the beam information with the highest priority; if the latest second storage table is empty, clearing the beam information in the third storage table and entering the switching logic of the Ku modem itself.

[0012] Optionally, the shipborne dual-band satellite fusion network controller further includes a Ka service interface and a Ku service interface. After the frequency band is switched, the corresponding service network is switched, and the local area network is connected through the Ka service interface and the Ku service interface respectively.

[0013] Optionally, when executing the preset switching logic, the processing module is used to switch to the Ka baseband network manually or switch to the Ku baseband network manually.

[0014] According to a second aspect of the present invention, there is provided a dual - frequency fusion satellite communication system, including a ship - borne dual - frequency satellite fusion network controller and a dual - frequency antenna. Among them, the ship - borne dual - frequency satellite fusion network controller includes a Ka management interface for protocol communication with a Ka modem; a Ku management interface for protocol communication with a Ku modem; an ACU interface for communicating with the controller of the dual - frequency antenna; and a processing module. The Ka management interface is used to obtain the satellite - seeking parameter information of a preset Ka modem; the Ku management interface is used to obtain the satellite - seeking parameter information of a preset Ku modem; the processing module is used to execute a preset switching logic. When executing the preset switching logic, the switching result is determined based on the preset switching logic, and the satellite - seeking parameter information is processed based on the switching result to obtain standard protocol parameters; the ACU interface is used to forward the standard protocol parameters to the controller of the dual - frequency antenna, so that the dual - frequency antenna controller generates a switching instruction based on the standard protocol parameters to control the dual - frequency antenna to perform frequency - band switching to achieve satellite - seeking tracking.

[0015] In this embodiment, there is a ship - borne dual - frequency satellite fusion network controller and a dual - frequency fusion satellite communication system. Among them, the ship - borne dual - frequency satellite fusion network controller includes a Ka management interface for protocol communication with a Ka modem; a Ku management interface for protocol communication with a Ku modem; an ACU interface for communicating with the controller of the dual - frequency antenna; and a processing module. The Ka management interface is used to obtain the satellite - seeking parameter information of a preset Ka modem; the Ku management interface is used to obtain the satellite - seeking parameter information of a preset Ku modem; the processing module is used to execute a preset switching logic. When executing the preset switching logic, the switching result is determined based on the preset switching logic, and the satellite - seeking parameter information is processed based on the switching result to obtain standard protocol parameters; the ACU interface is used to forward the standard protocol parameters to the controller of the dual - frequency antenna, so that the dual - frequency antenna controller generates a switching instruction based on the standard protocol parameters to control the dual - frequency antenna to perform frequency - band switching to achieve satellite - seeking tracking. By communicating with the dual - frequency antenna and two modems through interfaces, and converting the protocol data of the corresponding modem into standard protocol data according to the switching logic result for communication with the antenna controller, the switching between Ka and Ku is realized, overcoming the problem in the related art that the rate of the Ku large - beam under the existing "global network" cannot meet the user's needs, while the Ka high - throughput satellite network cannot form a global coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a shipborne dual-frequency satellite fusion network controller according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the switching logic according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the execution logic in the Ka high-throughput baseband network according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the execution logic in the Ku baseband network according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the beam-assisted switching logic according to an embodiment of the present invention; Figure 6a It is a schematic diagram of an application of a dual-frequency fusion satellite communication system according to an embodiment of the present invention; Figure 6b It is a schematic diagram of another application of a dual-frequency fusion satellite communication system according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the connection within a dual-frequency fusion satellite communication system according to an embodiment of the present invention. Specific Embodiments

[0018] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0019] It should be noted that the terms "first", "second", etc. in the specification of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present invention described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0020] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] Currently, the antenna only supports communicating with 1 modem simultaneously. Therefore, to implement this function, first, the antenna must support the interaction protocols of these 2 sets of modems to be used (it is possible that the antenna supports this part, but if the protocol differences are large, different versions need to be manually selected). If the antenna supports both of the 2 sets of protocols in use, when switching, the communication network cable needs to be unplugged and connected to another modem. At the same time, if the protocol differences between the 2 sets of modems are large, it is also necessary to log in to the antenna to manually change the version.

[0022] The realization of the antenna pointing function in shipborne satellite communication mainly relies on the information interaction between the baseband system and the satellite antenna. The interaction protocols are different according to different baseband systems. After preliminary statistics, the protocols used by mainstream baseband systems are all OpenAMIP protocols. The OpenAMIP protocol is an open antenna and modem interface protocol, which is a protocol based on ASCII messages between an antenna controller and a modem and is used for information exchange between the antenna controller and the satellite modem. However, due to the differences in the formats and contents of the OpenAMIP protocols of different baseband manufacturers, different antenna manufacturers support different versions of the OpenAMIP protocol, resulting in certain barriers in terms of interoperability. To achieve the universality of the research product, it is necessary to deeply understand the OpenAMIP protocol, clarify the differences in the OpenAMIP protocols of each mainstream baseband system, and confirm the protocol content of the interaction between each baseband system and the antenna, so as to have the ability to be compatible with different baseband OpenAMIP protocols and antennas of different manufacturers.

[0023] For the dual-frequency satellite fusion network controller, to meet the actual functional requirements, it is necessary to consider the protocol transmission problem between the dual-frequency antenna and the dual-frequency network controller, the protocol transmission problem between the dual-frequency network controller and different modems, and the handover determination and link handover problems between different basebands and different networks. The key technologies adopted in this embodiment are the OpenAMIP protocol conversion technology and the multi-baseband system parallel antenna management technology.

[0024] According to an embodiment of the present invention, there is provided a shipborne dual-frequency satellite fusion network controller, as Figure 1As shown, it includes a Ka management interface for protocol communication with a Ka modem, a Ku management interface for protocol communication with a Ku modem, and a processing module. The Ka management interface is used to obtain the satellite finding parameter information of a preset Ka modem. The Ku management interface is used to obtain the satellite finding parameter information of a preset Ku modem. The processing module is used to execute a preset switching logic. When executing the preset switching logic, the switching result is determined based on the preset switching logic, and the satellite finding parameter information is processed based on the switching result to obtain standard protocol parameters. The ACU interface is used to forward the standard protocol parameters to the controller of the dual-band antenna, so that the dual-band antenna controller generates a switching instruction based on the standard protocol parameters to control the dual-band antenna to perform frequency band switching to achieve satellite finding and tracking.

[0025] In this embodiment, the main objective is to make full use of the advantages brought by multi-band satellite resources under the "global network", with the shipborne dual-band satellite fusion network controller as the core, to solve the automatic switching function between different baseband networks of different frequency bands under the same antenna. According to the existing usage requirements, the corresponding baseband system is switched to control and manage the antenna for satellite pointing. Relying on the dual-band satellite fusion network controller to perform frequency band switching control on the dual-band antenna, the dual-band antenna is responsible for receiving and transmitting signals in the Ka or Ku frequency band and receiving instructions to perform corresponding frequency band switching. The dual-band satellite fusion network controller determines the link quality and coverage, and based on the determined logic and rules, transmits the corresponding switching instructions to the dual-band antenna.

[0026] It conducts protocol communication with the dual-band fusion antenna and two modems through interfaces, and converts the protocol data of the corresponding modem into standard protocol data according to the switching logic result for communication with the antenna controller. Specifically, the dual-band satellite fusion network controller needs to communicate with the management interfaces of the two modems, obtain the satellite finding parameter information of the two modems, and send the converted standard parameter information to the dual-band antenna terminal according to the built-in switching logic. The controller of the dual-band antenna terminal controls the dual-band antenna to complete satellite finding and tracking.

[0027] The frequency band switching mainly considers the switching of the baseband network and the execution of the dual-band antenna. The dual-band antenna can obtain information such as the satellite orbit position, satellite finding carrier frequency, symbol rate, and BUC / LNB local oscillator from the dual-band satellite fusion network controller through the standard OpenAMIP protocol. The dual-band antenna can identify whether frequency band switching is required based on the carrier information and the local oscillator information and execute accordingly. Therefore, the frequency band switching is mainly for the switching of the baseband network.

[0028] In order to establish normal communication between the modem and the antenna control unit (ACU), the dual-band switching controller needs to support the OpenAMIP protocol function. The dual-band switching controller is the OpenAMIP TCP Server for the modem and the OpenAMIP TCP Client for the antenna control unit (ACU). As a two-way proxy of OpenAMIP, the dual-band switching controller needs to understand the OpenAMIP protocol messages sent by the antenna control unit (ACU) and the modem, and process the proprietary extension parameters into protocol standard parameters to improve the compatibility of protocol processing.

[0029] Exemplarily, the instructions sent by the antenna control unit (ACU) to the dual-band antenna contain satellite seeking parameters, such as satellite longitude, downlink frequency, symbol rate, and polarization mode. However, since f2 in the standard OpenAMIP protocol H f1 f2 rof=f3 is the tracking bandwidth and rof is an optional parameter, it is impossible to calculate the symbol rate in the absence of the rof value, which in turn causes the antenna to be unable to seek the satellite. Therefore, the shipborne dual-band satellite fusion network controller needs to complete the rof value in the H message of OpenAMIP sent to the antenna control unit (ACU). This value is obtained by sending relevant query instructions to the modem to obtain the symbol rate RS value or the roll-off factor ROF value. Based on the tracking bandwidth BW value and the roll-off factor ROF value, the antenna control unit (ACU) can calculate the symbol rate RS value according to the formula RS = BW / ROF, and then send all the required parameters to the antenna control unit (ACU) to seek the satellite normally.

[0030] The dual-band switching controller will act as a communication proxy between the modem and the antenna control unit (ACU), and receive satellite seeking related parameters from the modem: S f1 f2 f3 (longitude of the satellite, maximum offset of the satellite latitude (for inclined orbit satellites), nominal polarization offset of the satellite (for inclined satellites).) H f1 f2 (downlink frequency, carrier bandwidth) P c1 c2 (receive polarization, transmit polarization) B f1 f2 (LNB local oscillator, BUC local oscillator) E f1 (maximum transmit power) T f1 f2 (transmit frequency, transmit bandwidth) K f1 (maximum tilt of the minor axis of the beam with respect to the geosynchronous arc (negligible)) After F (end command), cache the message first, then obtain the roll-off factor ROF value according to the API interface provided by the Modem, piece it together into "H f1 f2 rof=f3" and then forward it to the antenna controller (ACU). The antenna controller (ACU) can extract the satellite longitude, downlink frequency, symbol rate, and polarization mode parameter values based on these satellite search parameters, and then send a satellite search parameter command to the antenna to allow the antenna to search for satellites normally.

[0031] The dual-band switching controller will act as a communication proxy between the modem and the antenna controller (ACU). In order to adapt to different types of modems and antenna controllers (ACU), the dual-band switching controller will cache the OpenAMIP instructions sent by the modem, perform deduplication processing, and then forward them to ensure that all required parameters are included for the antenna controller (ACU).

[0032] As an optional implementation method of this embodiment, the processing module is used to obtain the current geographic location information when executing the preset switching logic, and determine whether the current geographic location is within the Ka coverage range; if it is within the Ka coverage range, switch the Ka baseband network to the network in use, wherein, if it is within the Ka coverage range, switch the Ka baseband network including if the current network in use is the Ka baseband network, determine the link quality; if the current network in use is not the Ka baseband network, switch to the Ka baseband network, and after the switch is successful, determine the link quality; if the determination result is link interruption, determine whether the link is under Ku coverage; if it is within the Ku coverage range, switch the Ku baseband network to the network in use; otherwise, re-process based on the latest current geographic location until the link is restored or within the Ku coverage range, wherein, after successfully switching the Ku baseband network to the network in use, wait for a preset time and determine whether the Ku link is available; if it is not available, perform beam-assisted switching and execute the logic under the Ku baseband network.

[0033] In this optional implementation, the computing power of the dual-band controller is used to design coverage range determination mechanisms and link quality determination mechanisms according to different scenarios to achieve intelligent switching of frequency bands, ensuring that the device always selects a frequency band with abundant resources and good link quality for communication. To achieve intelligent switching of frequency bands, it is first necessary to confirm the strategies for geographic location determination and link quality determination, eliminate interference factors, and ensure the accuracy and real-time nature of the acquired data.

[0034] When determining the geographical location, it is first necessary to correctly and real-time obtain the geographical location information of the terminal site; secondly, it is necessary to have the specific coverage range of the satellite beam as the basis for determining whether it is inside or outside the coverage; at the same time, considering that the coverage map is an irregular graph, it is necessary to find a suitable algorithm to determine whether the terminal is inside or outside the coverage at this time and provide an accurate determination result to the logical algorithm.

[0035] As an optional implementation manner of this embodiment, when the processing module executes the preset switching logic, if it is outside the Ka coverage range, it determines whether the Ku baseband network is the active network; if it is the active network, it executes the logic under the Ku baseband network; if it is not the active network, it switches the Ku baseband network to the active network; after switching the Ku baseband network to the active network, it waits for a preset duration to determine whether the Ku link is available; if it is not available, it executes beam-assisted handover and executes the logic under the Ku baseband network.

[0036] In the above optional implementation manner, referring to Figure 2 , the dual-band controller obtains accurate geographical location information from the antenna through the OpenAMIP protocol to confirm the current location of the site. On the premise that the company has the coverage range of all satellite beams of the "global network", the terminal device can use the ray method to confirm whether it is within the coverage of the determined beam. (The specific idea is to draw a ray from the current position in any direction and count the number of intersections of the ray and the polygon. If the total number of intersections is odd, the site is inside the polygon; if the total number of intersections is even, the point is outside the polygon).

[0037] Specifically, when the dual-band satellite fusion network controller is powered on normally, it obtains the current location information, determines the coverage range where the system is located according to the location information. If it is within the Ka high-throughput coverage range, it switches the Ka baseband network to the active network and starts running the logic under the Ka baseband network until it switches to the Ku baseband network and runs the logic under the Ku baseband network.

[0038] If the site is not within the Ka high-throughput coverage range, it is defaulted that the site is within the Ku large beam coverage range (the Ku large beam coverage range is wider and completely overlaps the Ka high-throughput satellite network coverage), and the Ku baseband network is switched to the active network.

[0039] To accurately determine whether a site is located within a polygon area covered by a satellite, we can use the ray method for verification. The detailed steps of this method are as follows: First, take the current position of the site as the starting point of the ray, and then extend an infinitely long ray in any direction. Next, it is necessary to carefully count and record the intersection points of this ray with the polygon edge. By observing the number of intersection points counted, if this number is odd, then it can be definitely concluded that the site is located inside the polygon. Conversely, if the number of intersection points counted is even, then it can be determined that the site is located outside the polygon. The logical basis of this judgment method is that when a ray is emitted from the site to the polygon, each time a new intersection point is added, it means that the ray either enters the interior of the polygon or leaves the polygon. Since the starting point of the ray is outside the polygon, according to physical necessity, the ray will eventually leave the polygon, which forms a "leaving" intersection point. Therefore, if the total number of intersection points is odd, it means that the ray intersects the polygon for the first and last times in a "leaving" manner, which proves that the site is located inside the polygon. On the contrary, if the total number of intersection points is even, it means that the ray intersects the polygon for the first and last times in the opposite manner, that is, it "enters" the polygon for the first time and "leaves" the polygon for the last time, so we can determine that the site is located outside the polygon.

[0040] Reference Figure 3 Referring to the handover rules under the Ka high-throughput satellite network shown in Figure 3 , start to determine the location of the terminal. If the site is under the coverage of the Ka high-throughput satellite, regularly verify the link quality. When the link is interrupted, to avoid the interruption caused by beam handover, design a determination waiting time, and re-determine the link quality after a period of time after the interruption. Only when the link interruption is determined twice is the link interruption confirmed. When the link interruption is determined, re-determine whether the link is under the Ku coverage. If it is already under the Ku coverage, then access the Ku large beam. If it is not under the Ku coverage, then continuously re-detect the link until the link is restored or enters the Ku coverage; when it is detected that the terminal is outside the Ka coverage and inside the Ku coverage, regardless of whether the site is online or not, it will automatically switch to the Ku baseband network to ensure the stability of the terminal link.

[0041] As an optional implementation manner of this embodiment, when the processing module executes the logic under the Ku baseband network, if the current geographical location is within the Ka coverage range, it starts a countdown; after the countdown ends, it determines whether the current Ku link is available; if the current Ku link is available, it obtains the latest current location again and determines whether the latest current location is under Ka coverage. If it is under Ka coverage, it continues the countdown; after the countdown reaches 0, it switches the Ka baseband network to the active network; if the current Ku link is unavailable, it waits for a specified duration and then determines whether the Ku link is available. If it is still unavailable, it directly switches the Ka baseband network to the active network; wherein, before the countdown reaches 0, it continues to determine whether the Ku link is available.

[0042] In the above optional implementation manner, referring to Figure 4 the switching rule under the schematic Ku large beam network, it determines the location of the terminal. When it determines that the terminal is under the Ka high-throughput satellite coverage, it starts to enter the countdown, otherwise it continuously determines the geographical location. After starting to enter the countdown, it runs the ping program to confirm whether the current Ku link is available. When the link is interrupted, to avoid the interruption caused by beam switching, it designs a determination waiting time and re-determines the link quality after a period of time after the interruption. Only when both determinations confirm the link interruption is the link interruption confirmed. When the link interruption is confirmed, it sets the countdown to 0 and attempts to access the Ka baseband network. If the link is confirmed to be online, after completing the link quality determination, it determines the geographical location again. If the site is still under Ka coverage, it continues the countdown and performs the link quality determination again. When the countdown ends and the site is always under Ka coverage, it confirms that the site has fully entered the Ka high-throughput network and switches the Ka baseband network to the active network. If before the determination countdown reaches zero, the site exits the Ka high-throughput coverage, it re-enters the loop to determine the geographical location logic until it re-enters the Ka high-throughput satellite coverage and resets the countdown time.

[0043] In the above optional implementation manner, when under the Ka network, the switching mainly occurs when the link is interrupted and the device is under Ku coverage. At the same time, when the link exits the Ka coverage, regardless of whether the link is interrupted, the switching is performed (mainly considering that at this time it has exited the coverage. Although the link is not interrupted, the satellite signal is relatively poor, so the direct switching is also considered). When under the Ku network, only when it is confirmed that it is stably under Ka coverage for a long time is the Ka network switching considered (mainly to avoid being at the edge of the coverage and frequently entering and exiting the coverage, resulting in being unable to access the network after switching to the Ka network and then switching back to Ku again, and then attempting to switch to the Ka network again after a short time, which is likely to cause a long-term interruption).

[0044] As an optional implementation manner of this embodiment, when the processing module executes the preset handover logic, if it is unavailable, the beam assisted handover includes: determining the optimal beam resource based on the current geographical location and the preset beam coverage map; sending a forced handover instruction for the optimal beam resource to the Ku modem to switch the beam.

[0045] As an optional implementation manner of this embodiment, when the processing module executes the preset handover logic, determining the optimal beam resource based on the current geographical location and the preset beam coverage map includes: obtaining the preconfigured satellite beam information from the Ku modem; comparing the satellite beam information with the preset beam information to determine the intersection of the satellite beam information and the preset beam information, and storing the beam information in the intersection in the first storage table; determining the beam that matches the current position from the first storage table to obtain the first target beam information and storing the first target beam information in the second storage table, where the beam that matches the current position is determined from the beam coverage map; determining the beam information with the highest priority in the second storage table, and switching the Ku modem to the beam information with the highest priority; determining whether the Ku link is available after waiting for a specified duration; if it is available, enter the handover logic of the Ku modem itself.

[0046] As an optional implementation manner of this embodiment, when the processing module determines whether the Ku link is available after waiting for a specified duration when executing the preset handover logic, if it is unavailable, the current beam information is stored in the third storage table; obtaining the latest current geographical location, obtaining the beam that matches the latest current position from the first storage table to get the second target beam, and updating the second storage table based on the second target beam; deleting the beam with the same beam information as that in the third storage table from the updated second storage table to get the latest second target beam and form the latest second storage table; if the latest second storage table is not empty, determining the beam information with the highest priority from the latest second storage table and switching the Ku modem to the beam information with the highest priority; if the latest second storage table is empty, clearing the beam information in the third storage table and entering the handover logic of the Ku modem itself.

[0047] In the above optional implementation manner, the function is specifically enabled when switching between the Ka modem and the Ku modem, aiming to optimize the handover efficiency. The dual - frequency controller will accurately determine the most suitable beam resource in the current environment based on the terminal longitude and latitude information obtained in real - time by the dual - frequency antenna and the internally preset beam coverage map. Once the determination is completed, the dual - frequency controller will immediately send a forced handover instruction to the Ku modem to initiate the fast beam handover process.

[0048] Reference Figure 5, Regarding pre-configured satellite beam information: When the modem needs to support automatic switching under multiple beams, the satellite carrier information corresponding to the beams needs to be written into the device in advance. For the modem to access the network under several satellite beams, the corresponding satellite beams need to be configured in advance. Each satellite beam will have a separate beam number, and the obtained beam information is the beam number. The table storing the beam number in the figure is represented by maplet1. The first storage table is represented by maplet2. The second storage table is represented by mapleta. The third storage table is represented by mapletb. Maplet a is the list of beams that are available at the current geographical location configured by our self-developed terminal but have not been verified for availability after satellite switching. As the verification work is continuously repeated, the number of beams in maplet a will become fewer and fewer. When maplet a is an empty table, to avoid the situation where there are updated beams in the modem but our self-developed terminal has not updated the beam number, resulting in the modem being unable to access the network in the newly configured beam, after all the beams configured as available by the self-developed terminal have been tried, let the modem perform satellite switching polling according to its own logic. At this time, it is equivalent to exiting the beam-assisted switching logic, and our device no longer controls the Ku modem and continues to run to the next step of the overall logic. The overall logic is a continuously looped logic. When running to certain conditions later, it will re-enter this beam-assisted switching logic. Therefore, it is necessary to clear the beams in maplet b in advance to avoid skipping those beams that may be usable when re-entering the beam-assisted switching logic. Mablet b is the list of beams that have been tried and confirmed to be unable to access the network in the current state, but being unable to access the network in the current state does not ensure that they will always be unable to access the network in the future.

[0049] When determining the above link quality, the handover logic program will use the method of pinging the peer address to evaluate the link quality. For public network and private network users, due to different network environments, the destination addresses of pinging are also correspondingly different. Specifically, public network users will use the method of pinging the public network address to evaluate whether the link quality meets the standard; while private network users will ping the private address of the private network to determine whether the link quality meets the handover conditions. In order to reduce the consumption of satellite traffic, the evaluation of link quality mainly relies on the window mode. This mode involves continuously sampling the link quality for a period of time and synthesizing these sampling results to obtain a final judgment. Specifically, the system will initiate a continuous detection once every minute. Each detection contains 60 ping operations, and the interval between each operation is 1 second. If the number of timeout occurrences of the ping operation for the target address reaches or exceeds 10 times during these 60 detections, it is determined that this section of the link is in a non-connected state, and the corresponding link non-connection processing logic is triggered. At the same time, a continuous determination mechanism is set. If there are 5 consecutive situations where the ping fails, it is determined that the link is interrupted. When implementing the ping function, the handover logic program uses the ping command of the Linux system and ensures that only one data packet is sent for each ping operation through parameter settings. Subsequently, the program will read the return value of the ping command to obtain the evaluation result of the link quality.

[0050] Further, after switching the Ku modem to the beam information with the highest priority, the new beam satellite search information will be sent to the antenna. After receiving the satellite search information, the antenna will re-perform satellite search and tracking, re-search for the satellite. At the same time, the waiting time for the modem to access the network is relatively long. Waiting for 5 minutes in the figure is to ensure that there is time to access the network normally after finding the accurate satellite, so as to be accurate when determining whether the link is available.

[0051] As an optional implementation manner of this embodiment, the processing module is used to switch to the Ka baseband network manually or switch to the Ku baseband network manually when executing the preset handover logic.

[0052] In order to meet the personalized needs of different users, a manual control mode is specially incorporated into the design. Users can flexibly choose to access the Ka baseband network or the Ku baseband network according to their actual needs. It should be noted that once the user makes a manual selection, if they need to enable the automatic handover mode again, they need to perform a re-selection operation. In the single Ka mode, the dual-band satellite fusion network controller will perform specific operations: only convert the OpenAMIP protocol data of the Ka modem and then transfer it to the antenna controller; at the same time, only transmit the service data stream of the Ka modem to the user local area network to ensure the focus and efficiency of data transmission.

[0053] In the case of selecting the single Ku mode configuration, the dual-band satellite fusion network controller will perform specific tasks: it is only responsible for converting the OpenAMIP protocol data generated by the Ku modem and then securely transmitting it to the antenna controller; at the same time, it will also ensure that the service data of the Ku modem can be accurately transmitted to the user local area network to meet the actual needs of users. This process strictly follows the established procedures to ensure the rigor, stability, and security of data transmission.

[0054] As an optional implementation manner of this embodiment, the shipborne dual-band satellite fusion network controller further includes a Ka service interface and a Ku service interface. After the frequency band is switched, the corresponding service network is switched, and the local area network is connected through the Ka service interface and the Ku service interface respectively.

[0055] In terms of the service network, the dual-band satellite fusion network controller needs to communicate with the service interfaces of 2 modems. The 2 service interfaces will serve as the 2 network outlets of the terminal system. When the management network is switched, the service network is switched synchronously. The local area network interface, as the network interface of the ship end, is responsible for distributing the service addresses that can access the Internet to the ship end application system. The switching of the ship end IP service network mainly needs to consider the selection of the service data outlet, that is, to confirm the network outlet of the terminal device and control the flow direction of the service data.

[0056] The service network switching refers to the switching of the entire system's working service logic, including the switching of working devices (modems) and network routing switching. The switching service is only effective in the switching working mode of the system. The network switching is not automatically executed by the controller software, and the switching instruction comes from the switching logic software. In order to implement the instruction switching, the controller system software builds in a switching service, which docks with the upper-layer logic decision-making switching software, adopts a private customized tcp protocol, and the protocol data is encrypted with crc32. The switching service is a server based on the TCP protocol. Server features: The server exchanges service data with other modules through the message event mechanism. It provides services for the user switching software to operate on the controller system. It supports multi-user concurrent access. The main services include responding to geographical location queries, network link switching, beam queries and switching, etc.

[0057] Specifically, the Ka service interface: the network outlet of the device. The interface can be configured with the service IP address of the Ka modem. On the one hand, it is used for the device to verify the status of the corresponding satellite network, and at the same time it is used to access the respective service networks to realize the function of accessing the ship end IP service data to the corresponding satellite network.

[0058] The Ku service interface: the network outlet of the device. The interface can be configured with the service IP address of the Ku modem, which is used to verify the status of the corresponding satellite network, and at the same time it is used to access the respective service networks to realize the function of accessing the ship end IP service data to the corresponding satellite network.

[0059] It also includes a user local area network interface: used to connect to the business network on the ship end, and according to the switching logic, select to communicate with the corresponding Ka or Ku service interface for docking, so as to realize the function of accessing the corresponding baseband network through the user local area network.

[0060] The functions of the dual-band switching controller can be subdivided into service network switching, frequency band switching (OpenAMIP protocol conversion, Telnet protocol proxy conversion), satellite coverage map import and recognition, geographical location acquisition, coverage range determination, link quality determination, satellite beam assisted switching, etc. The implementation methods of functions such as baseband network switching and service network switching are clarified, the communication between the baseband side and different modems is completed, and the antenna side is docked with the antenna controller in a unified standard format.

[0061] In this embodiment, protocol communication is carried out with the dual-band integrated antenna and 2 modems through the interface, and the protocol data of the corresponding modem is converted into standard protocol data according to the switching logic result to communicate with the antenna controller. According to the switching logic result, the local area network service outlet of the dual-band integrated network controller is switched to the corresponding modem service outlet. The ability to switch the ship end service network and the baseband network is realized.

[0062] This embodiment solves the problems of high terminal cost and complex technical solutions brought by the use scenarios of dual antennas and dual frequency bands in the "global network". Through the unified management of the Ka+Ku dual-band integrated satellite communication terminal system, the ship end network can realize the automatic frequency band switching and satellite resource optimization functions based on the coverage range, link quality, and business strategy. A mature product of the "global network" dedicated terminal system is formed and promoted to ocean-going ships, promoting the use of high-throughput resources by end users, enhancing the user experience, and alleviating the resource tension problems in some areas.

[0063] According to an embodiment of the present invention, there is also provided a dual - frequency fusion satellite communication system, including a ship - borne dual - frequency satellite fusion network controller and a dual - frequency antenna. Among them, the ship - borne dual - frequency satellite fusion network controller includes a Ka management interface for protocol communication with a Ka modem; a Ku management interface for protocol communication with a Ku modem; an ACU interface for communicating with the controller of the dual - frequency antenna; and a processing module. The Ka management interface is used to obtain the satellite - seeking parameter information of a preset Ka modem; the Ku management interface is used to obtain the satellite - seeking parameter information of a preset Ku modem; the processing module is used to execute a preset switching logic. When executing the preset switching logic, a switching result is determined based on the preset switching logic, and the satellite - seeking parameter information is processed based on the switching result to obtain standard protocol parameters; the ACU interface is used to forward the standard protocol parameters to the controller of the dual - frequency antenna, so that the dual - frequency antenna controller generates a switching instruction based on the standard protocol parameters to control the dual - frequency antenna to perform frequency - band switching to achieve satellite - seeking tracking.

[0064] In this embodiment, the ship - borne Ka + Ku dual - frequency fusion satellite communication terminal system mainly consists of a ship - borne Ka + Ku dual - frequency fusion antenna and a ship - borne Ka + Ku dual - frequency satellite fusion network controller, combined with modem devices and network interaction devices of different frequency bands under the global network.

[0065] Exemplarily, if the dual - frequency fusion antenna only outputs one transceiver cable, considering that the modem under the "global network" only turns on the transmit state after receiving and locking, and there is no link interference problem, the transceiver cables of the two modems can be directly connected to the dual - frequency fusion antenna by configuring a splitter / combiner, as shown in Figure 6a .

[0066] If the dual - frequency fusion antenna outputs the corresponding frequency - band transceiver ports outward, the modems of the corresponding frequency bands are connected to the corresponding ports for one - to - one matching, as shown in Figure 6b .

[0067] Furthermore, the modem generally only provides one external interface, which includes both the protocol satellite - seeking parameter information of the management network segment and the service data information of the service network segment. Therefore, the corresponding management network segment and service network segment are usually separated by a switch. The ship - borne Ka + Ku dual - frequency fusion satellite communication terminal system includes two modems. When designing, the connection methods of different modems and the configuration of the corresponding switches need to be fully considered. When the modems both have only one external interface, the connection and configuration method is shown in Figure 7, the interfaces connected to the modems are all set to the Trunk port mode, and the VLANs that can pass through include the management and service VLANs corresponding to the modems. The interfaces connected to the dual-band controller are configured with the corresponding access mode. If the management and service interfaces of the modem have been isolated by themselves, they can be directly connected to the dual-band controller bypassing the switch.

[0068] When the dual-band satellite fusion network controller realizes the baseband network switch, the automatic switching logic is the same as that of the previous embodiment, which will not be elaborated here.

[0069] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A shipborne dual-frequency satellite fusion network controller, characterized in that Including: A Ka management interface for protocol communication with a Ka modem; a Ku management interface for protocol communication with a Ku modem; an ACU interface for communicating with a controller of a dual-band antenna; and a processing module. Wherein, the Ka management interface is used to obtain satellite seeking parameter information of a preset Ka modem; The Ku management interface is used to obtain satellite seeking parameter information of a preset Ku modem; The processing module is used to execute a preset switching logic. Wherein, when executing the preset switching logic, a switching result is determined based on the preset switching logic, and the satellite seeking parameter information is processed based on the switching result to obtain standard protocol parameters; The ACU interface is used to forward the standard protocol parameters to the controller of the dual-band antenna, so that the dual-band antenna controller generates a switching instruction based on the standard protocol parameters to control the dual-band antenna to perform frequency band switching to achieve satellite seeking tracking.

2. The shipborne dual-frequency satellite fusion network controller according to claim 1, wherein The processing module is used to obtain the current geographical location information when executing the preset switching logic, and determine whether the current geographical location is within the Ka coverage area; If it is within the Ka coverage area, switch the Ka baseband network to the active network. Wherein, if it is within the Ka coverage area, switching the Ka baseband network includes determining the link quality if the current active network is the Ka baseband network; if the current active network is not the Ka baseband network, switch to the Ka baseband network, and after the switching is successful, determine the link quality; If the determination result is a link interruption, determine whether the link is under Ku coverage; if it is within the Ku coverage area, switch the Ku baseband network to the active network; otherwise, reprocess based on the latest current geographical location until the link is restored or within the Ku coverage area. Wherein, after successfully switching the Ku baseband network to the active network, wait for a preset duration and determine whether the Ku link is available; if it is not available, perform beam-assisted switching and execute the logic under the Ku baseband network.

3. The on-ship dual-frequency satellite fusion network controller according to claim 2, characterized in that The processing module is used to determine whether the Ku baseband network is the active network when executing the preset switching logic if it is outside the Ka coverage area; If it is the active network, execute the logic under the Ku baseband network; If it is not the active network, switch the Ku baseband network to the active network; after switching the Ku baseband network to the active network, wait for a preset duration and determine whether the Ku link is available; If it is not available, perform beam-assisted switching and execute the logic under the Ku baseband network.

4. The on-ship dual-frequency satellite fusion network controller according to claim 2 or 3, characterized in that, The processing module is used to execute the logic under the Ku baseband network: If the current geographical location is within the Ka coverage area, start a countdown; after the countdown ends, determine whether the current Ku link is available; If the current Ku link is available, obtain the latest current location again and determine whether the latest current location is under Ka coverage. If it is under Ka coverage, continue the countdown; after the countdown reaches 0, switch the Ka baseband network to the active network; If the current Ku link is not available, wait for a specified duration and then determine whether the Ku link is available. If it is still not available, directly switch the Ka baseband network to the active network; Before the countdown reaches 0, continue to determine whether the Ku link is available.

5. The on-ship dual-frequency satellite fusion network controller according to claim 2 or 3, characterized in that When executing the preset handover logic, if the aforesaid is unavailable, the processing module for performing beam-assisted handover includes: determining optimal beam resources based on the current geographical location and a preset beam coverage map; sending a forced handover instruction for the optimal beam resources to the Ku modem to switch the beam.

6. The on-ship dual-frequency satellite fusion network controller according to claim 5, wherein When executing the preset handover logic, the processing module for determining optimal beam resources based on the current geographical location and a preset beam coverage map includes: obtaining the pre-configured satellite beam information from the Ku modem. Comparing the satellite beam information with the preset beam information to determine the intersection of the satellite beam information and the preset beam information, storing the beam information in the intersection in a first storage table; determining the beam that matches the current position from the first storage table to obtain first target beam information and storing the first target beam information in a second storage table, wherein the beam that matches the current position is determined from the beam coverage map. Determining the beam information with the highest priority in the second storage table and switching the Ku modem to the beam information with the highest priority. Determine whether the Ku link is available after waiting for a specified duration; if available, enter the self-switching logic of the Ku modem.

7. The shipborne dual-band satellite fusion network controller according to claim 6, wherein When executing the preset handover logic, after waiting for a specified duration and determining whether the Ku link is available, if unavailable, the processing module stores the current beam information in a third storage table. Obtaining the latest current geographical location, obtaining the beam that matches the latest current position from the first storage table to get a second target beam, and updating the second storage table based on the second target beam. Deleting the beam with the same beam information as that in the third storage table from the updated second storage table to obtain the latest second target beam and form a latest second storage table. If the latest second storage table is not empty, determining the beam information with the highest priority from the latest second storage table and switching the Ku modem to the beam information with the highest priority. If the latest second storage table is empty, clearing the beam information in the third storage table and entering the self-switching logic of the Ku modem.

8. The shipborne dual-frequency satellite fusion network controller according to claim 1, characterized in that The shipborne dual-band satellite fusion network controller further includes a Ka service interface and a Ku service interface. After the frequency band is switched, the corresponding service network is switched, and the local area network is connected through the Ka service interface and the Ku service interface respectively.

9. The on-ship dual-frequency satellite fusion network controller according to claim 1, characterized in that, When executing the preset handover logic, the processing module is used to switch to the Ka baseband network manually or switch to the Ku baseband network manually.

10. A dual-frequency integrated satellite communication system, characterized in that, It includes a shipborne dual-band satellite fusion network controller and a dual-band antenna. The shipborne dual-band satellite fusion network controller includes a Ka management interface for protocol communication with the Ka modem; a Ku management interface for protocol communication with the Ku modem; an ACU interface for communicating with the controller of the dual-band antenna; and a processing module. The Ka management interface is used to obtain the satellite finding parameter information of a preset Ka modem; the Ku management interface is used to obtain the satellite finding parameter information of a preset Ku modem; the processing module is used to execute a preset switching logic. When executing the preset switching logic, the switching result is determined based on the preset switching logic, and the satellite finding parameter information is processed based on the switching result to obtain standard protocol parameters; the ACU interface is used to forward the standard protocol parameters to the controller of the dual-band antenna, so that the dual-band antenna controller generates a switching instruction based on the standard protocol parameters to control the dual-band antenna to perform frequency band switching to achieve satellite finding and tracking.

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