Internet constellation resource sharing architecture and design method thereof

Abstract

The application discloses an internet constellation resource sharing architecture and a design method thereof, and belongs to the field of satellite communication. The sharing architecture comprises at least one primary constellation satellite system and one secondary constellation satellite system; the secondary constellation satellite system comprises a large-scale constellation satellite and a plurality of distributed ground stations, and the satellite adopts a hop beam working mode. The application comprises the following steps: acquiring resource use conditions of the primary constellation satellite system, constructing a resource utilization statistical database of the primary constellation satellite system, planning satellite services of the secondary constellation satellite system, switching and selecting a star of a user terminal of the secondary constellation satellite system, and scheduling user resources of the secondary constellation satellite system in real time. According to the resource sharing architecture design, the secondary constellation satellite system can realize frequency resource sharing with the primary constellation satellite communication system by cognizing the multi-dimensional sparsity of resource use of the primary constellation and combining a beam scheduling strategy, so that the communication capacity of the secondary constellation satellite communication system is improved and the communication interruption probability is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of satellite communication, and relates to a constellation resource sharing architecture design for constellation sparse use rule cognition. BACKGROUND

[0002] The Internet constellation system design adopts large-scale low-orbit satellites to provide large-capacity and high-speed Internet access services for global users, and is one of the important solutions for global network coverage in the era of ground 5G and 5G-Beyond. The frequency resources of communication satellites are scarce global resources, and the construction of satellite Internet must first solve the problem of frequency resources. At present, the global satellite frequency resources are uniformly managed by the International Telecommunication Union, and the principle of "GSO (Geostationary Earth Orbit) satellite priority" and "first registration priority service" is adopted for the coordinated allocation of resources. For the construction needs of large-scale satellite Internet, considering the regulations that the system applying for new frequency resources cannot cause harmful interference to existing systems, it is extremely difficult to obtain independent frequency resources, therefore, combined with cognitive technology and resource scheduling strategy, the construction of China's own satellite Internet through the resource sharing of secondary constellation satellite systems and main constellation satellite systems is the only choice.

[0003] The resource sharing of multiple constellations, the current related research mainly focuses on the feasibility research of satellite constellation using frequency resources, the interference modeling analysis between multiple synchronous orbit satellites, the interference evaluation and avoidance between synchronous orbit satellites and low-orbit satellites, and the frequency sharing strategy research between double satellites based on different scene interference modeling. The above research cannot support the resource sharing scenario between multiple giant constellation satellite systems with large number of satellites, various orbit types and flexible and variable resources; at the same time, due to the application of compatible technologies such as satellite selection based on spatial isolation, isolation angle avoidance and common view interference, the main constellation satellite resources present irregularity and discontinuity in space-time-frequency-energy dimensions, and the secondary constellation satellite system can realize resource sharing by cognizing the multi-dimensional sparsity of the resource use of the main constellation and combining with the beam scheduling strategy, thereby a constellation resource sharing architecture design for constellation sparse use rule cognition is needed. SUMMARY

[0004] To solve the above problems, the present application provides an Internet constellation resource sharing architecture and a design method thereof, which is oriented to the sparse characteristics of the irregularity and discontinuity of the main constellation satellite system resources in space-time-frequency-energy dimensions, combines cognitive technology and resource scheduling strategy of the secondary constellation satellite system, takes into account the performance of the main constellation system, and enables the secondary constellation satellite system to efficiently share the resources of the main constellation system, thereby providing a solution to the frequency shortage problem in the construction of giant Internet constellation.

[0005] An Internet constellation resource sharing architecture, comprising at least one primary constellation satellite system and one secondary constellation satellite system;

[0006] The secondary constellation satellite system comprises a large-scale satellite constellation and a plurality of distributed ground stations; the user terminal adopts a multi-beam phased array antenna to receive multiple signals; the satellite adopts a phased array-based agile beam operation mode to support spatial beam pointing agility;

[0007] The secondary constellation satellite system can uniformly schedule the satellites and user terminals thereof to realize data collection on the resource usage of the primary constellation system, wherein the data collection of the user terminal utilizes idle terminals or idle beams of the terminals;

[0008] The secondary constellation satellite system is provided with one or more ground management centers, which issue the same message to all user terminals through a forward broadcast channel, and vice versa, the user terminals interact with the system through a return channel;

[0009] The secondary constellation satellite system shares the frequency resources of the primary satellite constellation satellite system to provide services for global or regional users.

[0010] A design method of an Internet constellation resource sharing architecture, comprising the following steps:

[0011] 10) Obtain the resource usage of the primary constellation satellite system: use the multiple satellites and distributed ground user terminals of the secondary constellation satellite system to obtain the multi-dimensional resource usage data of the uplink and downlink of the primary satellite constellation satellite system;

[0012] 20) Construct a resource utilization statistical database of the primary constellation satellite system: based on the sensing and collection data, recognize the uplink and downlink resource usage rules of the primary constellation system resources, and based on geographic information, construct a multi-dimensional resource utilization statistical database of the primary constellation system in the region, such as space, time, frequency and energy;

[0013] 30) Plan the secondary constellation satellite system service: based on the resource utilization statistical database of the primary constellation satellite, face the user regional distribution, service distribution and dynamic changes of the secondary constellation satellite system, periodically plan the shareable resources and service areas of each satellite in the secondary constellation satellite system;

[0014] 40) Secondary constellation satellite system user terminal switching and resident star selection: comprehensively consider the shareable resources of the secondary constellation satellite and the service user business distribution, design the satellite selection, switching and resident strategy of the user terminal, and guide the user terminal to realize service satellite scheduling switching according to the process;

[0015] 50)Real-time scheduling of secondary constellation satellite system resources: considering the satellite's shareable resources, user terminal switching requirements and new business demand forecasts, combined with real-time cognitive results of primary constellation satellite system resources, real-time scheduling of satellite service resources in the secondary constellation satellite system that provides services is achieved.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. Improved frequency resource utilization: the frequency resources allocated to the primary constellation satellite system are shared by the secondary user through the resource sharing architecture design, ensuring the normal operation of the primary constellation satellite system while achieving secondary user resource sharing and improving the utilization of frequency resources.

[0018] 2. Good versatility: the present application designs to use secondary constellation satellites and ground user terminals to collect data on the uplink and downlink of the primary constellation satellite system, taking into account different orbit designs of the primary constellation satellite system, and can be used for resource sharing between constellation systems of various orbit types.

[0019] 3. Strong practicability: the present application is aimed at resource sharing between constellation systems composed of multiple satellites, taking into account the global coverage characteristics of constellation systems using multiple satellites, the dynamic nature of a single satellite, and the diversity of user distribution, which conforms to the actual constellation satellite system design and use.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an Internet constellation same frequency resource sharing schematic diagram.

[0022] Figure 2 is a giant Internet constellation resource sharing architecture design flowchart for constellation sparsity usage rule recognition.

[0023] Figure 3 is a secondary constellation satellite uplink and downlink data sensing and collecting schematic diagram in region A(m, n).

[0024] Figure 4 is a primary constellation system resource utilization statistical database construction schematic diagram.

[0025] Figure 5 is a service planning flowchart for resource sharing of the secondary constellation system.

[0026] Figure 6 is a secondary constellation system user terminal star selection and switching flowchart. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] As Figure 1 shown, an Internet constellation resource sharing architecture includes at least one primary constellation satellite system and one secondary constellation satellite system;

[0029] The secondary constellation satellite system includes a large-scale satellite constellation and a plurality of distributed ground stations (user terminals, gateway stations and ground management centers); the user terminals use multi-beam phased array antennas and can receive multiple signals; the satellites use phased array-based agile beams and support spatial beam pointing agility;

[0030] The secondary constellation satellite system is provided with one or more system control centers, which issue messages to all user terminals through a forward broadcast channel (i.e., a link from the ground management center to the user after being forwarded by the satellite); on the contrary, the user terminals can interact with the system through a return channel (i.e., a link from the user terminal to the ground management center after being forwarded by the satellite) or an inter-satellite link;

[0031] The secondary constellation satellite system can uniformly schedule the satellites and user terminals thereof to realize data collection on the resource usage of the primary constellation system, wherein the data collection of the user terminals mainly utilizes idle terminals or idle beams of the terminals.

[0032] As Figure 2 shown, a design method of an Internet constellation resource sharing architecture includes the following steps:

[0033] 10) Obtain the resource usage of the primary constellation satellite system: use the satellites and distributed ground user terminals of the secondary constellation satellite system to obtain the multi-dimensional resource usage of the uplink and downlink of the primary satellite constellation satellite system in different regions;

[0034] The step 10) of obtaining the resource usage of the primary constellation satellite system includes:

[0035] (11) Based on the coverage ability and law of the secondary constellation satellite, divide the ground area into a plurality of sub-regions, sequentially denoted as A(m,n), wherein m represents the longitude index and n represents the latitude index, as Figure 3 shown.

[0036] (12) For a certain region A(m,n), use the multi-satellite receiving channel of the secondary constellation satellite system to obtain the resource usage of the uplink of the primary constellation system in the region in time, space, frequency and energy dimensions, and the data collected by a single satellite and a single channel is denoted as Here i represents the secondary constellation satellite number, i∈N sat , N sat represents the number of satellites of the secondary satellite system, j represents the beam number of the satellite, t represents the collection time, and f represents the collection frequency, asFigure 3 as shown.

[0037] (13) For a certain area A(m, n), the ground user terminals of the secondary constellation satellite system are used to collect the resource usage of the main constellation satellite system downlink in the time, space, frequency, energy, etc. dimensions of the area. The data collected by a single secondary constellation satellite system user terminal for the main constellation satellite system downlink in the area is denoted as where k represents the number of the terminal, j represents the number of the beam pointing of the terminal, t represents the collection time, and f represents the collection frequency, such as Figure 3 as shown.

[0038] 20) Constructing a main constellation satellite resource utilization statistical database: based on the collected data, the uplink and downlink resource usage rules of the main constellation system are recognized, and a multi-dimensional resource utilization statistical database of the main constellation system is constructed based on geographic information;

[0039] The main constellation satellite resource utilization statistical database construction (20) step is as shown in Figure 4 , including:

[0040] (21) Recognizing the uplink rules of the main constellation satellite system. For the A(m, n) area, based on the coverage rules of the secondary constellation satellite in the area, the data collected by the secondary satellite passing through in sequence is returned to the gateway station through the feeder link, and finally the collection of the uplink sensing data in the area is completed in the ground management center, which can be denoted as where N sat represents the secondary constellation satellite that can cover the area; based on the collected sensing data, the ground management center recognizes the user distribution and business distribution of the main satellite constellation system in the area, and summarizes the beam scheduling period and the beam lighting rules in the time, space, frequency, and energy dimensions.

[0041] (22) Recognizing the downlink rules of the main constellation satellite system. For the A(m, n) area, the idle antennas of the secondary constellation satellite user terminals are used to collect the main constellation satellite system downlink data, which is denoted as where N T_free represents the number of ground idle user terminals of the secondary constellation satellite system, and finally the collection of the downlink sensing data in the area is completed in the ground management center; combined with the beam pointing of each terminal, the ground management center recognizes the downlink business distribution of the main satellite constellation system in the area, and summarizes the beam scheduling period and the beam lighting rules in the time, space, frequency, and energy dimensions associated with the satellite ID.

[0042] (23) Based on the knowledge of the regional usage rules of the downlink of the primary constellation satellite system provided in steps (21), (22), a database of resource usage of the primary constellation satellite communication system is constructed. The keywords of the database include: primary constellation satellite ID, service ground area number, service resource rule description (frequency usage, beam pointing rule, time hopping rule, signal energy interval, link type).

[0043] 30) Planning of secondary constellation satellite system service: based on the resource usage database of the primary constellation satellite, the user area distribution, service distribution and service dynamic change of the secondary constellation satellite system, the available resources of a single satellite in the secondary constellation satellite system are planned periodically;

[0044] The step 30) of the secondary constellation satellite system service planning is shown in Figure 5 , which includes:

[0045] (31) According to the resource usage database of the primary constellation satellite established in step 20) and the analysis of the operation rules of the secondary constellation satellite system, the service capacity that can be provided by different satellites of the secondary constellation system in different ground areas based on the resource sharing strategy is mined, including system capacity and continuous service capacity;

[0046] (32) According to the historical service demand data of each ground area of the secondary constellation satellite communication system, the regional associated user service demand prediction is carried out, and the prediction data of the change of user service demand is obtained.

[0047] (33) Based on the satellite service capacity of the secondary constellation satellite system in step (31) and the prediction data in step (32), combined with the current service users and the predicted possible service users of the satellite, the satellite service planning in the next resource allocation period is carried out, including the satellite service area and the available resources (frequency, beam, time and energy) of the satellite.

[0048] 40) Secondary constellation satellite system user terminal switching and residence selection: considering the available resources of the satellite and the service user situation comprehensively, the satellite selection, switching and residence strategy of the user terminal of the secondary constellation satellite system is designed, guiding the user terminal to realize service satellite scheduling switching according to the flow;

[0049] The step 40) of the user terminal switching and residence selection is shown in Figure 6 , which includes

[0050] (41) According to the satellite service planning, the system periodically broadcasts the state set of the switchable target satellite The element content of the set is a vector with a length of N c , and N c represents the number of satellites in the target satellite set. The terminal receives the service planning;

[0051] (42) The secondary constellation system terminal user makes a switching decision according to the state set message of the switchable target satellite broadcast by the system, combines the local position information and the available satellite signal quality monitoring information, and initiates a switching application to the system;

[0052] (43) The secondary constellation satellite communication system reviews the switching application submitted by the terminal, agrees to the terminal switching application when the reserved resource threshold is met, otherwise, it is rejected; when the reserved resource threshold is not met, the system performs switching scheduling on the terminal.

[0053] 50) Real-time scheduling of secondary constellation satellite system resources: considering the available resources of the satellite, the switching demand of the user terminal and the prediction of new business demand, combining the real-time cognition result of the main constellation satellite system resources, the real-time scheduling of the satellite and service resources in the secondary constellation satellite system is realized.

[0054] The resource sharing architecture design of the application can realize the frequency resource sharing with the main constellation satellite communication system, improve the communication capacity of the secondary constellation satellite communication system and reduce the communication interruption probability through the multi-dimensional sparsity of the resource use cognition of the main constellation and the combination of the beam scheduling strategy.

Claims

1. A design method for an internet constellation resource sharing architecture, characterized in that, The aforementioned internet constellation resource sharing architecture It includes at least one primary constellation satellite system and one secondary constellation satellite system; The secondary constellation satellite system includes a large-scale satellite constellation and several distributed ground stations; the user terminal uses a multi-beam phased array antenna to receive multiple signals; the satellite adopts a phased array-based agile beam operation mode, supporting agile space beam pointing. The secondary constellation satellite system can uniformly schedule its satellites and user terminals to collect data on the resource usage of the main constellation satellite system. The data collection of user terminals utilizes idle terminals or idle beams of terminals. The secondary constellation satellite system has one or more ground management centers, which broadcast the same message to all user terminals through a forward broadcast channel; conversely, user terminals interact with the system through a return channel. The secondary constellation satellite system shares the frequency resources of the main constellation satellite system to provide services to global or regional users. The design method includes the following steps: 10) Obtain resource usage of the main constellation satellite system: Utilize multiple satellites of the secondary constellation satellite system and distributed ground user terminals to obtain multi-dimensional resource usage data of the uplink and downlink of the main constellation satellite system, respectively; 20) Construct a statistical database of resource utilization of the main constellation satellite system: Based on the data collected by sensing, understand the uplink and downlink resource usage patterns of the main constellation satellite system, and construct a multi-dimensional statistical database of resource utilization of the main constellation satellite system in the region based on geographic information; 30) Planning services for secondary constellation satellite systems: Based on the statistical database of resource utilization of the primary constellation satellite system, and taking into account the user area distribution, service distribution and dynamic changes of services in the secondary constellation satellite system, periodically plan the shared resources and service areas of each satellite in the secondary constellation satellite system; 40) Sub-constellation satellite system user terminal switching and stationing satellite selection: Based on the shared resources of the sub-constellation satellites and the distribution of service user services, design satellite selection, switching and stationing strategies for user terminals, and guide user terminals to realize service satellite scheduling and switching according to the process; 50) Real-time scheduling of secondary constellation satellite system resources: Taking into account the shareable resources of satellites, user terminal switching needs and new service demand predictions, and combining the real-time cognitive results of the primary constellation satellite system resources, the real-time scheduling of satellite service resources providing services in the secondary constellation satellite system is realized.

2. The design method according to claim 1, characterized in that, Step 10), which involves obtaining the resource usage status of the main constellation satellite system, specifically includes the following steps: (11) Based on the coverage capabilities and patterns of secondary constellation satellites, the ground area is divided into several sub-regions, which are denoted as A(m,n), where m represents the longitude label and n represents the latitude label; (12) For a certain region A(m,n), utilize the multi-satellite receiving channels of the secondary constellation satellite system to obtain the multi-dimensional resource usage of the main constellation satellite system's uplink in that region; where, the data acquired by a single satellite and a single channel is denoted as... Here, i represents the satellite number of the secondary constellation, i∈N sat Nsat represents the number of satellites in the secondary constellation satellite system, j represents the satellite beam number, t represents the acquisition time, and f represents the acquisition frequency. (13) For a certain region A(m,n), data on the usage of multi-dimensional resources of the main constellation satellite system downlink in that region is collected using ground user terminals widely distributed across the secondary constellation satellite system; wherein, the data collected by a single secondary constellation satellite system user terminal on the main constellation satellite system downlink in that region is denoted as . Here, k represents the terminal number, l represents the beam pointing number of the terminal, t represents the acquisition time, and f represents the acquisition frequency.

3. The design method according to claim 2, characterized in that, Step 20), which involves constructing a resource utilization statistics database, specifically includes the following steps: (21) Understanding the uplink patterns of the main constellation satellite system, for region A(m,n), based on the coverage patterns of secondary constellation satellites in this region, all collected uplink data from the main constellation satellite system are... Where N∈N sat It represents secondary satellites that can cover the area, understands the distribution of user services of the main constellation satellite system in the area, and summarizes the beam scheduling cycle and beam lighting patterns of the main constellation satellite system in the space-time-frequency-energy dimensions. (22) To understand the downlink patterns of the main constellation satellite system, for region A(m,n), use the idle antennas of user terminals in the secondary constellation satellite system to collect downlink data from the main constellation satellite system, denoted as [data to be collected]. Where N T_free It represents the number of idle ground user terminals of the secondary constellation satellite system; combined with the beam pointing of the user terminals, it reveals the downlink service distribution of the main constellation satellite system in the region; based on the ephemeris of the main satellite, it summarizes the beam lighting patterns of the main constellation satellite system in the space-time-frequency-energy dimensions of beam scheduling cycle and associated satellite ID; (23) Based on the understanding of the regional usage patterns of the uplink and downlink of the main constellation satellite system provided in steps (21) and (22), construct a resource utilization statistics database for the main constellation satellite system. The keywords of the resource utilization statistics database include, but are not limited to: main constellation satellite ID, service ground area number, and service resource pattern description.

4. The design method according to claim 3, characterized in that, Step 30), which involves planning the secondary constellation satellite system service, specifically includes the following steps: (31) Based on the statistical database of resource utilization of the main constellation satellite system and the operation law of the secondary constellation satellite system established in step 20), evaluate the service capabilities of different satellites of the secondary constellation satellite system in different ground areas A(m,n), including system capacity and continuous service capability. (32) Based on the historical service demand data of each surface area A(m,n) of the secondary constellation satellite system, perform regional correlation user service demand prediction to obtain user service demand prediction data; (33) Based on the satellite service capabilities of the secondary constellation satellite system in step 31) and the prediction data in step 32), and combining the current service users and predicted potential service users of the satellites, the principle of maximizing system capacity is adopted, i.e. Among them, R i,A ( m,n) The channel capacity of the i-th satellite in region A(m,n) is represented by k, which is a coefficient related to geographical location. Satellite service planning for the next resource allocation cycle is carried out, including available satellite resources and satellite service area.

5. The design method according to claim 4, characterized in that, Step 40), the user terminal switching and satellite selection for the secondary constellation satellite system, specifically includes the following steps: (41) Based on the satellite service plan, the system broadcasts the status set of the target satellite for switching. The elements of the set are a string of length N. c The vector, N c This represents the number of satellites in the target satellite set; (42) The secondary constellation satellite system terminal user receives the status set message of the switchable target satellite broadcast by the system, combines the local location information and the available satellite signal quality monitoring information, makes a handover pre-decision, generates a handover pre-decision message, and initiates a handover application to the system; (43) The secondary constellation satellite system reviews the handover application submitted by the terminal. If the reserved resource threshold is met, the system will approve the handover application; otherwise, it will reject it. If the reserved resource threshold is not met, the system may schedule the handover of the terminal.

6. The design method according to claim 5, characterized in that, Step 50), which involves real-time scheduling of secondary constellation satellite system resources, specifically includes the following steps: (51) The secondary constellation satellites generate a real-time available satellite resource utilization statistics database associated with the service area based on the system's satellite service plan and the real-time resource awareness of the primary constellation satellite system. (52) Based on the attributes of secondary constellation satellite service users, including original service users, switching users, and newly applied users, real-time resource scheduling is performed, a resource service list is generated, and the message is broadcast to the user terminal through the forward channel; (53) Based on the received available resource messages, the user adjusts the sending and receiving parameters to complete the allocation of service resources for the secondary constellation satellite system in the current area.

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