Constellation satellite on-the-fly access TT&C system and access method thereof

Abstract

The application provides a constellation satellite random access measurement and control system and a random access method thereof, the method comprising: the measurement and control system is composed of a random access transponder on each satellite in the constellation, each node station in a ground node station network, a random access main controller and a constellation operation center, wherein: the transponder realizes broadcast frame data receiving, access data frame forming and sending; the node station antenna adopts a phased array technology to form a panoramic beam pointing to the whole sky and a multi-point beam pointing to multiple satellites, so as to realize simultaneous sending and receiving data to multiple satellites; the random access controller adopts a combination of distribution and centralization to perform authentication processing on access application data and to generate a signaling signal, once the authentication is passed, a response to the satellite is sent, and confirmation information is sent, and the satellite can continue to send subsequent information after receiving the confirmation information; and the constellation operation center realizes resource configuration, scheduling and management of the satellite random access measurement and control system.

Description

Technical Field

[0001] This invention belongs to the field of satellite measurement and control technology, and relates to a constellation satellite access telemetry and control system and its access method. Background Technology

[0002] With the development of the aerospace industry, especially the rapid development of microsatellites in recent years—characterized by high flexibility, strong emergency response capabilities, and relatively low complexity and cost—and the future application of mega-satellite constellations, the number of satellites in orbit has increased dramatically. Simultaneously, satellite users span various industries and applications, leading to ever-growing demands for autonomous, automated, and intelligent satellite telemetry, tracking, and command (TT&C) and data transmission services. These factors will exacerbate the contradiction between aerospace TT&C and data transmission resources and service capabilities and the demands for TT&C and data transmission. Currently, the problem of scarce TT&C resources is typically addressed by adding TT&C stations or TT&C equipment to existing stations, inevitably resulting in increased costs and resource waste. Furthermore, traditional satellite TT&C and data transmission generally follows pre-arranged plans, requiring coordination of ground node station resources, configurations, and available time. This involves numerous manual operations and inter-agency coordination and communication, resulting in long processing times and low cost-effectiveness. These problems severely restrict the efficient and rapid improvement of TT&C and data transmission capabilities. Continuing to use the existing TT&C system will be unable to meet the TT&C needs of future mega-constellations and massive numbers of satellites. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a constellation satellite access telemetry and control system and its access method to adapt to the transmission of telemetry and remote control information of giant satellite constellations.

[0004] The technical solution of this invention is: a satellite constellation access telemetry and control system and its access method, wherein the access method includes a data / information transmission method for satellite downlink channel access and a data / information transmission method for satellite uplink broadcast channel to facilitate access; the satellite access telemetry and control system includes a satellite access transponder on each satellite in the satellite constellation, each node station in the ground node station network, an access master controller, and a constellation operation center, wherein:

[0005] The satellite access transponder further includes an access data transmission unit, a broadcast data receiving unit, and an information processing unit. The transponder's functions are: 1) to process the access information to be transmitted, forming access data frames; 2) the information processing unit to process key telemetry information from the constellation satellites; 3) to process information from the ground node network, forming remote control command information or injection data, and sending it to the satellite platform and payload in the satellite constellation; 4) the broadcast data receiving unit to receive broadcast frames from the ground node stations containing request response signaling and / or key remote control information; and 5) the access data transmission unit to transmit access signaling signals, health information, or key telemetry information.

[0006] The ground node network consists of dozens to hundreds of ground nodes, forming a global ground node network; each ground node includes: panoramic and multi-beam antennas, radio frequency and baseband units, and ubiquitous access remote controllers, wherein:

[0007] The ground node station functions as follows: 1) The panoramic and multi-beam antennas use phased array antenna technology to form a panoramic beam and multiple spot beams. The panoramic beam points to the entire sky, and the multiple spot beams point to multiple satellites simultaneously; 2) The radio frequency and baseband unit realizes the reception, frequency conversion, amplification, demodulation, despreading, and decoding of downlink access signals, as well as the formation, carrier modulation, spread spectrum modulation, encoding, frequency conversion, and power amplification of uplink broadcast frames; 3) The remote controller for access completes the reception, parsing, and processing of access frames, analyzes and authenticates the access request permissions of each satellite, and if the authentication of the remote controller for access passes, an application response signal is generated and fed back to the satellite's remote access transponder via the radio frequency and baseband unit and the panoramic and multi-beam antennas; at the same time, the satellite health information and key telemetry information are sent to the constellation operation center via the remote controller for access;

[0008] The on-demand access master controller functions as follows: in conjunction with the on-demand access remote controller within node station 4, it authenticates and generates signaling signals for the access permissions of each satellite in the constellation, and distributes authentication information to the on-demand access remote controllers at each ground node station. Once authentication is successful, it immediately responds to the satellite by sending confirmation information. After receiving the confirmation information, the satellite can continue to send subsequent information. The master controller also collects satellite health information, key telemetry information, and other information and sends them to the constellation operation center. The master controller also processes key remote control information from the constellation operation center, forms uplink broadcast frames, and sends them to the on-demand access remote controllers at the ground node stations.

[0009] The constellation operation center is responsible for the resource allocation, scheduling and management of the satellite access control system, as well as the operation and control of all satellites in the constellation.

[0010] In view of this, the present invention provides a satellite on-demand access method and apparatus, wherein the satellite on-demand access transponder can autonomously and automatically transmit telemetry information to the ground node station network in a timely manner, and correspondingly, the key remote control information of the ground node station network can also be transmitted to the constellation satellites at any time through the broadcast channel.

[0011] To achieve the above objectives, the present invention provides the following on-demand access method:

[0012] In a first aspect, the present invention provides a satellite on-demand access method, the access method comprising a method for sending an on-demand access request via a downlink channel and a method for sending a request response via a broadcast via an uplink channel, wherein:

[0013] The method for sending an access request via the downlink channel includes: the satellite access transponder generating a short data access request signaling based on the need to access the ground node station, and sending it to the ground node station using an ALOHA random time-division access method;

[0014] The method for transmitting the uplink channel request response includes: the ground node network authenticating the access request based on the received request signaling signal; once authentication is successful, a request response signaling is generated and broadcast to the satellite access transponder using one of the aforementioned broadcast methods; wherein...

[0015] In detail, when a satellite transmits information to a ground node station according to telemetry and control requirements, it first sends an access request signaling to the ground node station via the random access channel. After receiving the access request signaling, if the satellite has passed the authentication of the access controller, the ground node station uses the broadcast channel to send an application response signaling to the satellite to confirm the authentication. Then, the satellite can continue to send subsequent signaling signals and / or subsequent key telemetry information to the ground node station, wherein:

[0016] Secondly, the present invention provides a random access method using the ALOHA random time-division channel, wherein the ALOHA random time-division channel includes three access modes: short data random burst access mode, short data periodic burst access mode, and continuous data access mode. The ALOHA random time-division channel is used to transmit downlink signaling signals and key telemetry information.

[0017] in:

[0018] The access method further includes: the satellite access transponder generates short data according to the health status of the satellite, and sends it to the ground node station using a periodic short data burst access method, so that the constellation operation center can monitor the health status of the constellation satellites in real time;

[0019] The access method further includes: the satellite encounter access transponder generates continuous data based on the key telemetry information of the satellite, and sends it to the ground node station using a continuous transmission access method, so that the constellation operation center can monitor the on-orbit operation parameters of the constellation satellites in real time.

[0020] The access method further includes: once authentication is successful, the ground node station sends an application response signal to the satellite access transponder in a broadcast manner;

[0021] The access method further includes: once authentication is successful, the remote control command information of the ground node station is broadcast to the satellite access transponder.

[0022] Thirdly, the present invention also provides a satellite initial access method, wherein:

[0023] The satellite initial access method comprises the following steps: the satellite on-demand access transponder sends an initial access request signal; then, the ground node station receives the access request signal and performs authentication; if the authentication is successful, the ground node station sends a request response signal to the satellite on-demand access transponder; after receiving the request response signal, the satellite on-demand access transponder can continue to send subsequent access signaling, key telemetry information, or satellite health information.

[0024] Fourthly, the present invention also provides a method for terminating telemetry and control services, including a service termination method based on ground node stations and a service termination method based on satellite access transponders, wherein:

[0025] The service termination method based on ground node stations includes a method by which the ground node station sends a service termination signal to the satellite access transponder through the broadcast channel;

[0026] The service termination method based on a satellite-based unrestricted access transponder includes a method for the satellite-based unrestricted access transponder to send a service termination signal to the ground node station through a non-contention access channel, wherein the non-contention access channel is a radio resource control layer channel of the satellite-based unrestricted access transponder.

[0027] Fifthly, the invention also provides a network handover control method, including a handover method initiated by a ground node station and a handover method initiated by a satellite-based on-demand access transponder, wherein:

[0028] The handover method initiated by the ground node station includes: the ground constellation operation center and the node station initiate a network handover based on information such as satellite orbit parameters, node station location, tracking arc length, and access signal level, that is, determine the next ground node station that the satellite will access, and inform the satellite of the location of the ground node station that the satellite's random access transponder needs to access, so as to continue to carry out the next access service and telemetry and control service.

[0029] The handover method initiated by the satellite on-demand access transponder includes: the satellite on-demand access transponder initiates network handover based on information such as the satellite's own orbital parameters, stored ground node station locations, tracking arc length, and broadcast signal level changes. That is, the satellite constellation 1 determines whether it is about to leave the current node station coverage area. If the satellite determines that it has reached the coverage area of ​​another node station and needs to continue accessing, it continues to provide access services and telemetry and control services.

[0030] Furthermore, the network switching control method also needs to be determined based on the status of the satellite, wherein:

[0031] The satellite's status includes being online, offline, de-networked, and disconnected from the network, where:

[0032] The "on-network status" refers to the current operating status of the constellation satellites in the on-demand access telemetry and control system, including when they are accessing, transmitting data, or terminating telemetry and control services.

[0033] The off-network status is: the satellite's on-network operation for the current arc segment ends, and it temporarily and normally leaves the current network service. In this case, when re-entering the network, it generally does not need to re-register and re-authenticate (depending on user needs).

[0034] The de-network status is: the satellite has withdrawn from the constellation network or the ground node station network for a long period of time. If it rejoins the network, it needs to be re-registered and authenticated.

[0035] The offline state is caused by poor signal quality or a brief signal interruption during satellite cross-network / cross-site handover. In this case, if the time is short, it is generally not necessary to re-register and re-authenticate when re-entering the network.

[0036] Furthermore, when satellite constellation 1 needs to temporarily leave or normally exit the constellation access telemetry and control system, satellite constellation 1 sends a leave or withdrawal application; when the ground requires a satellite constellation 1 to leave or withdraw from the network, ground node station 4 sends a leave or withdrawal instruction to the satellite access transponder 2; after the satellite leaves / withdraws from the network, the constellation operation center 6 and the ground node station network 3 mark and publicize it.

[0037] Furthermore, during satellite telemetry, tracking, and command (TT&C) services, if it is necessary to change the service mode, the ground node station will send a service mode switching command through the uplink broadcast channel, and the satellite access transponder and the ground node station will complete the configuration and switching of the new state.

[0038] Sixthly, the present invention also provides a traditional telemetry and control data access method based on the aforementioned ALOHA random time-division channel control, wherein:

[0039] The conventional telemetry and control data access method includes conventional real-time telemetry data and delayed telemetry data of the satellite constellation 1, generating continuous data, and sending it to the ground node station 4 using a conventional telemetry method;

[0040] The conventional telemetry and control data access method also includes conventional remote control data and injection data from ground node station 4, which are sent to satellite constellation 1 using a conventional remote control method.

[0041] Seventhly, the present invention provides a satellite on-demand access telemetry and control system data transmission device, the device comprising two parts: an on-board device and a ground device, wherein:

[0042] The on-board device includes:

[0043] The detection unit is used to detect whether the satellite has data to be transmitted;

[0044] The judgment unit is used to determine the type of data to be sent.

[0045] The selection unit selects the ALOHA random time-division channel if the type is access application information; selects a periodic short data burst channel if the type is satellite health information; selects a continuously transmitted access channel if the type is critical telemetry information; and utilizes a traditional telemetry channel if the type is traditional satellite telemetry data.

[0046] The sending unit is used to send the access application information, satellite health information, key telemetry information or traditional telemetry data to the ground node station according to the selection result of the selection unit.

[0047] The ground device includes:

[0048] The receiving unit is used to receive various types of data or information transmitted by the satellite;

[0049] The receiving judgment unit is used to determine whether the data type received by the receiving channel is access application information;

[0050] The authentication unit determines that the type is access application information, and then performs authentication.

[0051] The response unit generates an application response information frame if authentication is successful.

[0052] A forming unit is used to write the request response information frame into a broadcast channel data frame;

[0053] The transmission judgment unit is used to determine the type of data to be transmitted through the transmission channel;

[0054] The transmitting unit is configured to send the request response information to the satellite access transponder based on the broadcast channel data frame.

[0055] Optionally, the sending determination unit is further configured to determine whether the data to be sent is key remote control information of the broadcast channel or traditional remote control data of the traditional remote control channel. If it is key remote control information of the broadcast channel, it is written into the broadcast channel data frame; if it is traditional remote control data, it is transmitted using the traditional remote control channel.

[0056] In an eighth aspect, the present invention also provides an electronic device, the electronic device comprising at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; the processor is used to call program instructions in the memory to execute the methods described in the first to seventh aspects.

[0057] In a ninth aspect, the present invention provides a storage medium for storing a computer program, wherein the computer program, when running, controls the device on which the storage medium is located to perform the methods described in the first to seventh aspects.

[0058] By means of the above technical solution, the present invention provides a method and device for accessing data in a constellation satellite's on-demand telemetry and control system, which detects whether there is data to be transmitted, and if so, establishes a communication connection with a ground node station and sends the telemetry and control data to the ground node station or the constellation satellite.

[0059] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0060] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of an embodiment of the overall composition structure of a constellation satellite access telemetry and control system employing distributed control according to the present invention;

[0062] Figure 2 This is a schematic diagram of an embodiment of the overall composition structure of a constellation satellite access telemetry and control system with centralized control according to the present invention;

[0063] Figure 3 This is a schematic diagram illustrating an embodiment of the initial access control method and access process for a constellation satellite on-demand access telemetry and control system according to the present invention;

[0064] Figure 4 This is a schematic diagram of an embodiment of the first method for sending service termination signaling in a constellation satellite access telemetry and control system according to the present invention;

[0065] Figure 5 This is a schematic diagram of an embodiment of the second method for sending end-of-service signaling in a constellation satellite access telemetry and control system according to the present invention;

[0066] Figure 6 This is a schematic diagram of an embodiment of a constellation satellite access device (on-board portion) according to the present invention;

[0067] Figure 7 This is a schematic diagram of an embodiment of a constellation satellite access device (ground part) according to the present invention. Detailed Implementation

[0068] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0069] like Figure 1 As shown, this invention provides an embodiment of the overall structure of a constellation-based satellite access telemetry and control system employing distributed control. The overall structure includes a satellite constellation 1, satellite access transponders 2 on each satellite, a ground node station network 3, each node station 4, an access master controller 5, and a constellation operation center 6, wherein:

[0070] Satellite Constellation 1 consists of satellites and / or satellite groups for various services. The number of satellites in Satellite Constellation 1 is 1-n, where n is tens of thousands of satellites, and the orbital altitude is approximately in the range of 200km to 2000km.

[0071] The satellite access transponder 2 comprises: an access data transmission unit 21, a broadcast data receiving unit 22, and an information processing unit 23; wherein:

[0072] The function of the random access data sending unit 21 is to send random access signaling, information and data.

[0073] The function of the broadcast data receiving unit 22 is to receive broadcast frame data sent by the ground node station, wherein the broadcast frame data includes application response information and key telemetry information;

[0074] The information processing unit 23 functions as follows: it processes the random access information and key telemetry information to be transmitted from the satellite constellation 1 to form access data frames and access signaling; it processes the information from the ground node network 3 to form remote control commands or injection data to be sent to the satellite platform and payload in the satellite constellation 1.

[0075] The ground node network 3 consists of 1-m ground node stations 4, where m is from tens to hundreds, forming a global ground node network, wherein:

[0076] Each ground node station 4 consists of a panoramic beam and multi-beam antenna 41, an RF and baseband unit 42, and an on-demand access remote controller 43, and its functions are as follows:

[0077] The panoramic beam and multi-beam antenna 41, by using phased array antenna technology, forms a panoramic beam and at least 16 point beams. The panoramic beam points to the entire sky, and the multi-point beams simultaneously point to at least 16 satellites.

[0078] The functions of the radio frequency and baseband unit 42 are: to receive, frequency convert, amplify and demodulate, despread and decode downlink random access signals, as well as to form uplink broadcast frames, carrier modulation, spread spectrum modulation, coding and power amplification;

[0079] The function of the remote controller 43 for unrestricted access is to cooperate with the main controller 5 to receive, parse and process access frames, authenticate the access request permission of each satellite, and if the authentication of the main controller 5 is passed, an application response information is generated and fed back to the satellite unrestricted access transponder 2 via the radio frequency and baseband unit 42 and the panoramic and multi-beam antenna 41. At the same time, the satellite health information and key telemetry information are sent to the constellation operation center 6 via the main controller 5.

[0080] The function of the on-demand access master controller 5 is as follows: cooperating with the on-demand access remote controller 43 of the node station 4, it authenticates the access rights of each satellite in the satellite constellation 1, and distributes the authentication information to the on-demand access remote controllers 43 of each ground node station 4. Once the authentication is successful, it immediately responds to the satellite and sends confirmation information. After receiving the confirmation information, the on-demand access transponder 2 can continue to send subsequent information. At the same time, the on-demand access remote controller 43 also collects the health information, key telemetry information and other signaling information of the satellite constellation 1 and sends them to the constellation operation center 6. Furthermore, it processes the key remote control information from the constellation operation center 6, forms an uplink broadcast frame, and sends it to the on-demand access remote controller 43 in the ground node station 4.

[0081] The function of the constellation operation center 6 is to allocate, schedule and manage resources for the satellite access telemetry and control system, as well as to operate and control all satellites in the satellite constellation 1.

[0082] like Figure 2 As shown, this invention provides an embodiment of the overall structure of a constellation satellite on-demand access telemetry and control system employing centralized control. The overall structure of the centralized control constellation satellite on-demand access telemetry and control system includes a satellite constellation 1, a satellite on-demand access transponder 2 on each satellite, a ground node station network 3, each node station 4, an on-demand access master controller 5, and a constellation operation center 6, wherein:

[0083] In the embodiment Figure 2 In, with the Figure 1 The difference is that, Figure 1 The access control system employs a distributed controller approach, where each node station has a remote access controller utilizing edge computing technology, and a master access controller is located at the constellation operation center. The remote and master access controllers work together to perform authentication and access control for the constellation's on-demand satellite access tracking and control system. Figure 2 The random access controller in this embodiment is a centralized controller, meaning that only one random access controller is set up for the entire system. Figure 2 In this system, except for the lack of a remote access controller within the ground node station, the other components and functions are the same as... Figure 1 The same applies, so I won't go into details here.

[0084] like Figure 3 As shown, this invention provides an embodiment of an initial access control method and access procedure for a constellation satellite random access telemetry and control system. The initial access control method is as follows:

[0085] (1) The satellite access transponder 2 automatically sends an access request signal to the ground node station 4 based on its own orbital position and the stored positions of various ground node stations 4, including the satellite identification number, satellite orbital data and satellite health information; if there is key telemetry information, it sends an "access request + telemetry service request" signal.

[0086] (2) After receiving the satellite's access application, the ground node station 4 and the random access master controller 5 perform satellite identity authentication based on the application information;

[0087] (3) After successful satellite identity authentication, ground node station 4 sends an application response information to satellite random access transponder 2 through the broadcast channel, indicating that authentication has been passed, login is successful, and network access is allowed;

[0088] (4) Subsequently, the system will enter the on-network service phase as needed, such as sending periodic short data, sending key telemetry information, sending key remote control data, and sending traditional telemetry and remote control data.

[0089] Specifically, such as Figure 3 As shown, the access control process is as follows:

[0090] 301. Sending Initial Access Request: The ad-hoc access transponder 2 of the satellite constellation 1 first sends an initial access request signaling;

[0091] 302. Receiving Initial Access Request Signalling: The ground node station 4 receives the initial access request signalling sent by the random access transponder 2;

[0092] 303. Signaling processing: The access request signaling is processed by the remote access controller 43 of the ground node station 4 to obtain the authentication information;

[0093] 304. Authentication: Authentication is performed by the random access main controller 5;

[0094] 305. Confirm Authentication Passed: If authentication is successful, then authentication is confirmed.

[0095] 306. Request response information frame generation: The ground node station 4 generates a request response information frame based on the authentication result;

[0096] 307. Sending Request Response Signaling: The ground node station 4 sends a request response signaling to the satellite constellation 1 random access transponder 2;

[0097] 308. Sending subsequent signaling: After receiving the request response signaling, the satellite access transponder 2 can continue to send subsequent access signaling to the ground node station 4, and the ground node station 4 can also send subsequent request response signaling to the satellite access transponder 2.

[0098] 309. On-line service: After authentication, the constellation satellites enter the on-line service phase of the telemetry and control system and continuously transmit satellite health information, key satellite telemetry information, or key satellite remote control information.

[0099] like Figure 4 As shown, this invention provides an embodiment of a method for ending telemetry and control services in a constellation satellite access telemetry and control system. The steps of the method for ending telemetry and control services are as follows:

[0100] 401. End of Network Service: The network service ends after the telemetry and / or remote control missions of Satellite Constellation 1 are completed. The specific steps are as follows:

[0101] 402. Generate on-line service termination signaling: The satellite access transponder 2 generates on-line service termination signaling for this mission;

[0102] 403. The satellite access transponder 2 sends a service termination signal: When the on-network service ends, the radio resource control layer of the satellite access transponder 2 sends a service termination signal to the ground node station 4.

[0103] 404. Sending Service End Confirmation Signal: After the ground node station 4 receives the service end signal sent by the satellite access transponder 2, it sends a service end confirmation signal to the satellite access transponder 2 through the broadcast channel;

[0104] 405. Marking and Public Notice: The constellation operation center 6 marks the end of the service and sends the public notice of the end of the service to the ground node stations 4 in various locations.

[0105] 406. Entering the next service: After the satellite constellation 1 receives the service end confirmation signal, the constellation satellites will enter the next service process through the access telemetry and control system.

[0106] like Figure 5 As shown, this invention provides another embodiment of a method for ending telemetry and control services in a constellation satellite's on-demand access telemetry and control system. The steps of this method are as follows:

[0107] 501. End of Network Service: The network service ends when the telemetry or remote control mission of Satellite Constellation 1 is completed. The specific steps are as follows:

[0108] 502. Generate service termination signaling: The ground node station 4 generates a service termination signaling for this task.

[0109] 503. Sending a service termination signal: When the online service ends, the ground node station 4 sends a service termination signal to the satellite transponder 2 through the broadcast channel;

[0110] 504. Generate service end confirmation signaling: After the satellite transponder 2 receives the service end signaling, it generates service end confirmation signaling;

[0111] 505. Sending service end confirmation message: Sending a service end confirmation message to the ground node station 4 through the radio resource control layer of the satellite access transponder 2;

[0112] 506. Marking and Public Notice: The constellation operation center 6 marks the end of the service and sends the public notice of the end of the service to the ground node stations 4 in various locations.

[0113] 507. Entering the next service: After the ground node station 4 receives the service end confirmation information and the annotation and announcement information from the constellation operation center 6, the constellation satellite enters the next service process through the access telemetry and control system.

[0114] like Figure 6 and Figure 7 As shown, this invention provides an access device for a constellation satellite on-demand telemetry and control system. The access device includes two parts: an on-board unit and a ground-based unit, wherein:

[0115] The above-ground portion, such as Figure 6 As shown, it includes:

[0116] Detection unit 601 is used to detect whether there is data to be transmitted by the constellation satellites;

[0117] Judgment unit 602 is used to determine the type of data to be sent;

[0118] Selection unit 603 selects the ALOHA random time-division channel if the type is access application information; selects a periodic short data burst channel if the type is satellite health information; selects a continuously transmitted access channel if the type is critical telemetry information; and selects a traditional telemetry channel for transmission if the type is traditional satellite telemetry data.

[0119] The sending unit 604 is used to send the access application information, satellite health information, key satellite telemetry information or traditional telemetry data to the ground node station according to the selection result of the selection unit;

[0120] The ground portion, such as Figure 7 As shown, it includes:

[0121] The receiving unit 701 is used to receive various types of data or information transmitted by the satellite;

[0122] The first judgment unit 702 is used to determine whether the data type received by the receiving channel is access application information;

[0123] The authentication unit 703 performs authentication if it determines that the type is access application information.

[0124] Response unit 704 generates an application response information frame if authentication is successful;

[0125] Forming unit 705 is used to write the request response information frame into the broadcast channel data frame;

[0126] The second judgment unit 706 is used to determine the type of data to be transmitted in the transmission channel;

[0127] The sending unit 707 is used to send the application response information to the satellite access transponder according to the data frame;

[0128] Optionally, the second judgment unit 706 is further configured to determine whether the data to be sent is the key remote control information of the broadcast channel or the traditional remote control data. If it is the key remote control information of the broadcast channel, it is written into the broadcast channel data frame; if it is the traditional remote control data, it is transmitted using the traditional remote control channel.

[0129] Furthermore, embodiments of the present invention also provide an electronic device, the electronic device including at least one processor, and at least one memory and bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the above-mentioned... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The constellation satellite access tracking and control system and its access method described herein.

[0130] Furthermore, embodiments of the present invention also provide a storage medium for storing a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the above-described... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The constellation satellite access tracking and control system and its access method described herein.

[0131] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0132] It is understood that the relevant features in the above methods and apparatus can be referenced interchangeably. Furthermore, the terms "first," "second," etc., in the above embodiments are used to distinguish between embodiments and do not represent the superiority or inferiority of any particular embodiment.

[0133] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, units, and devices described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0134] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0135] In addition, the memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0136] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, devices, apparatuses, and / or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0137] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, systems, apparatuses, devices, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0138] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0139] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0140] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0141] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0142] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0143] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0144] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0145] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A constellation satellite access control system, characterized in that, The constellation satellite access tracking and control system includes a satellite access transponder (2) on each satellite in the satellite constellation (1), each node station (4) in the ground node station network (3), an access master controller (5), and a constellation operation center (6), wherein: A satellite constellation (1) is composed of satellites for various services. The satellite constellation (1) consists of hundreds to tens of thousands of satellites. Each satellite has a satellite-to-everything transponder (2), the composition and function of which include: The function of the on-demand access data transmission unit (21) is: 1) Receive access information, health information and key telemetry information from the information processing unit (23); 2) Form an access data frame, the data frame containing access signaling information, satellite health information and key satellite telemetry information; 3) Encode, carrier modulate and spread spectrum modulate the access data frame to form a carrier signal; 4) Convert and amplify the carrier signal and send the access signal to the ground node station (4) using an ALOHA random time division access method; The broadcast data receiving unit (22) has the following functions: 1) Complete the reception of uplink broadcast signals containing application response information and key remote control information; 2) Despread, demodulate and decode the broadcast signals; 3) Obtain the broadcast frame data sent by the ground node station (4); 4) Transmit the broadcast frame data to the information processing unit; 5) Transmit traditional remote control commands or injected data to the satellite platform and payload; The information processing unit (23) has the following functions: 1) Process the random access information to be sent to generate access data frames and initial access signaling; 2) Process the health information from the satellite constellation (1) to form periodic short data; 3) Process the key telemetry information from the satellite constellation (1) to form downlink telemetry frame data; 4) Process the broadcast information from the ground node station (4) to analyze the application response information and authentication confirmation information sent by the ground node station (4); 5) Process the broadcast information from the ground node station (4) to analyze the key remote control information sent by the ground node station (4) and send remote control commands to the satellite platform and payload in the satellite constellation (1); 6) Generate subsequent access signaling; The ground node network (3) consists of dozens to hundreds of ground node stations (4), forming a global ground node network. The ground node stations (4) include the following components and functions: The ground node station (4) consists of a panoramic and multi-beam antenna (41), a radio frequency and baseband unit (42), and an on-demand access remote controller (43), and its functions are as follows: The panoramic and multi-beam antenna (41) has the following functions: 1) By using phased array antenna technology, a panoramic beam and multiple spot beams are formed; 2) The panoramic beam points to the entire sky, receiving downlink access signals from satellites at any time and transmitting uplink broadcast signals; 3) The panoramic beam is also used to receive critical telemetry information at lower rates and transmit critical remote control information at lower rates; 4) The multiple spot beams point to multiple satellites simultaneously, receiving downlink telemetry signals from satellites at higher rates and transmitting uplink remote control signals at higher rates. The radio frequency and baseband unit (42) has the following functions: 1) Receive downlink access signals from panoramic and multi-beam antennas; 2) After frequency conversion and amplification, convert the downlink RF frequency to an intermediate frequency; 3) After despreading, demodulation, and decoding, recover the downlink baseband signal and extract the access data frame; 4) Transmit the access data frame to the remote access controller; 5) Receive broadcast frame data from the remote access controller; 6) Encode, carrier modulate, spread spectrum modulate, frequency convert, and power amplify the uplink broadcast frame data to form an uplink RF signal; 7) Transmit the uplink broadcast RF signal to the panoramic and multi-beam antennas (41). The function of the remote access controller (43) is as follows: 1) Complete the reception, parsing and processing of access data frames; 2) Complete the on-demand access control of the satellite constellation; 3) Cooperate with the on-demand access master controller to analyze, process and authenticate the access request permission of each satellite; 4) If the authentication is successful, generate the request response information; 5) Write the request response information into the uplink broadcast frame; 6) Feed back to the satellite on-demand access transponder (2) via the radio frequency and baseband unit (42) and panoramic and multi-beam antenna (41); 7) On the other hand, transmit the satellite health information and key telemetry information to the constellation operation center (6) via the on-demand access master controller (5); 8) Send or receive various signaling information from the constellation operation center; 9) Complete the processing and transmission of telemetry and remote control information; The main functions of the on-demand access main controller (5) include: 1) Authentication of access permissions for each satellite in the satellite constellation (1); 2) Distribution of authentication information to the remote access controller (43) of each ground node station (4); 3) Completion of satellite network entry, network presence, network exit, network withdrawal, and network disconnection operations and controls, provision of corresponding labels, and public announcement to each node station in the ground node station network (3); 4) Storage and archiving of satellite network entry, network presence, network exit, network withdrawal, and network disconnection status and related data for convenient retrieval by ground users; 5) Provision of a ground Internet interface to enable on-demand connection between the constellation satellite access telemetry and control system and ground users; The main functions of the constellation operation center (6) include: 1) Collect and process satellite health information, key telemetry information and other information sent by the ground node station (4); 2) On the other hand, generate satellite remote control information and send it to the corresponding ground node station (4); 3) Implement resource allocation, scheduling and management of the satellite access telemetry and control system; 4) Complete the operation and control of all satellites in the satellite constellation (1).

2. A method for accessing a constellation satellite's on-demand telemetry and control system, characterized in that, The method is applied to the system of claim 1, and the method includes: The system access methods include two types: distributed control and centralized control. The distributed control method is as follows: the access control function is divided into main control and remote control. The main control function is located in the random access main controller (5) of the constellation operation center (6); the remote control function is located in the remote controller (43) in the ground node station (4). The remote controller (43) adopts edge computing technology to complete some access control functions close to the channel side in the ground node station. The centralized control method is as follows: the constellation satellite access telemetry and control system is configured with only one centralized control access controller, which is located in the constellation operation center and undertakes the access control and authentication functions of the entire constellation satellite access telemetry and control system.

3. The method according to claim 2, characterized in that, The system access method further includes: a downlink channel on-demand access request method and an uplink channel broadcast request and response method, wherein, The downlink channel random access request method is as follows: the satellite constellation (1) generates short data access request signaling according to the need to access the ground node station (4), and sends it to the ground node station (4) using an ALOHA random time-division access method; The uplink channel uses a broadcast method to request and respond to the application. The ground node station (4) and the random access master controller (5) authenticate the access application based on the received application signaling signal. Once the authentication is successful, an application response signaling is generated and broadcast to the satellite constellation (1).

4. The method according to claim 2, characterized in that, The method further includes: the satellite access transponder (2) generates short data based on satellite health information and sends it to the ground node station (4) using a periodic short data burst method; the satellite access transponder (2) generates continuous data based on key telemetry information of the satellite and sends it to the ground node station (4) using a continuous transmission method. Satellite health information and key telemetry information are also transmitted to the constellation operation center (6) so that the constellation operation center (6) can keep track of the health status and working status of the satellite constellation (1) in real time.

5. The method according to claim 2, characterized in that, The satellite access transponder (2) transmits data to the ground node station (4) using a traditional telemetry transmission method based on real-time and delayed telemetry data from the satellite. Once authentication is successful, the remote control data to be transmitted and the injected data of the ground node station (4) are sent to the satellite access transponder (2) using a traditional remote control transmission method.

6. The method according to claim 2, characterized in that, The initial satellite access method comprises the following steps: 1) The satellite access transponder (2) sends an initial access request signal; 2) The ground node station (4) then receives the access request signal; 3) The remote access controller and the main controller jointly perform authentication processing; 4) If the authentication is successful, the ground node station (4) sends an application response signal to the access transponder (2); The satellite access transponder (2) can continue to send subsequent access signals or key telemetry information or satellite health information only after receiving the application response signal.

7. The method according to claim 4, characterized in that, The method also includes two network handover control methods: one is a handover control method initiated by a ground node station (4), and the other is a handover control method initiated by a satellite constellation (1), wherein: The handover control method initiated by the ground node station (4) includes: the ground node station (4) initiates network handover based on information such as satellite orbit parameters, node station location, tracking arc length, and access signal level, that is, determines the next node station (4) to be accessed by the satellite constellation (1), and informs the satellite access transponder (2) of the location of the node station to be accessed, and continues to carry out the next access service and telemetry and control service. The switching control method based on the satellite constellation (1) is initiated by the satellite constellation (1) based on its own orbital parameters, the stored ground node station locations, the tracking arc length, the broadcast signal level changes, and other information to determine whether it is about to leave the current node station coverage area. If the satellite constellation (1) determines that it has reached the coverage area of ​​other node stations and needs to continue accessing services or business services, it will continue to carry out the next step of access services and telemetry and control business services. The network switching control method can also be determined based on the state of the satellite constellation (1), which includes: on-network state, off-network state, de-network state, and disconnected state, wherein: The online status refers to the current operating status of the constellation's on-demand access telemetry and control system, including when it is accessing, transmitting data, or terminating telemetry and control services. The off-network status refers to the satellite's current on-network operation ending and temporarily leaving the current network service. Under these circumstances, when re-entering the network, it generally does not need to re-register and re-authenticate. The de-network status is: the satellite constellation (1) has withdrawn from the ground node station network (3) for a long time. If it re-enters the network, it needs to re-register and be authenticated. The offline state is caused by poor signal quality or a brief interruption or loss of connection during satellite cross-network / cross-site handover. In this case, if the time is short, it is generally not necessary to re-register and re-authenticate when re-entering the network. When the satellite constellation (1) needs to temporarily leave or withdraw from the constellation satellite access telemetry and control system, there are two ways to notify the other party: one is that the ground node station (4) first sends a leave or withdrawal instruction to the satellite access transponder (2) through the broadcast channel; the other is that the satellite access transponder (2) first sends a leave or withdrawal application through the non-contention access channel. The leave or withdrawal instruction sent by the non-contention access channel to the ground node station (4) is a signaling signal from the radio resource control layer of the satellite access transponder (2). After the satellite leaves / withdraws from the network, the constellation operation center (6) and the ground node station network (3) mark and publicize it. When the telemetry and control service being performed is about to end, there are two ways to notify the other party: one is that the ground node station (4) sends a service end signal to the satellite access transponder (2) through the broadcast channel, and the other is that the satellite access transponder (2) sends a service end signal to the ground node station (4) through the non-contention access channel. The service end signal sent to the ground node station (4) through the non-contention access channel is a signaling signal from the radio resource control layer of the satellite access transponder (2). During satellite telemetry, tracking, and command (TT&C) services, if it is necessary to change the service mode, the ground node station will send a service mode switching command through the uplink broadcast channel, and the satellite and the ground will complete the configuration and switching of the new state.

8. An electronic device, characterized in that, The electronic device includes at least one processor, and at least one memory and bus connected to the processor; wherein the processor and memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the method according to any one of claims 1 to 7.

9. A storage medium, characterized in that, The storage medium is used to store a computer program, wherein the computer program, when running, controls the device where the storage medium is located to execute the method described in any one of claims 1 to 7.

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