CN115865165A - Multi-satellite multi-track global interconnection broadband satellite communication system - Google Patents
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Abstract
The invention discloses a multi-satellite multi-orbit global interconnection broadband satellite communication system, and relates to the field of satellite communication. The system divides the network control of the broadband satellite communication network into a control surface and a management surface, wherein the control surface is independently controlled by each constellation, and adopts a structure of 'satellite-ground backup and multi-satellite cooperation' for a stationary orbit satellite constellation and a structure of 'satellite-ground cooperation' for an inclined synchronous orbit satellite constellation and a medium and low orbit satellite constellation according to the orbit characteristics; the management surface performs centralized management on each constellation, and organizes interconnection and intercommunication of services among the constellations and cross-constellation roaming of the satellite terminal. The invention can be used for realizing a broadband satellite communication system adopting high-orbit and low-orbit satellite mixed networking, can adapt to different orbital characteristics for flexible networking, realizes roaming and service intercommunication of satellite terminals among heterogeneous constellations, and improves the expansion and integration capacity of the network to satellite resources and networking efficiency.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a related technology in the aspect of architecture design, which can be used for a broadband satellite communication system adopting high and low orbit satellite hybrid networking and solves the problems of elastic networking and agile management and control.
Background
Satellite communications have been developed for over half a century. Satellite communication has become one of the irreplaceable core communication means because it has a series of advantages of global coverage, no restriction by ground obstacles, rapid deployment and the like, can provide stable communication capability for multiple users across the intercontinental region and the ocean, and can also provide effective information transmission in sudden events of regions with unpredictable places, times and intensities.
With the rapid development of on-board processing and inter-satellite link technologies and the increasing improvement of on-board computing and storing capabilities in recent years, a satellite communication system gradually develops from the past transparent forwarding of a single satellite to a satellite internet with on-board processing and inter-satellite networking capabilities, a plurality of constellations formed by high-orbit satellites and low-orbit satellites form a satellite communication network together with a ground gateway station and a bearing network, how to design a reasonable satellite-ground function distribution method and ensure the efficient management and control of the network are key and precondition for realizing the efficient service and the overall resource utilization of the system.
At present, most of on-orbit satellite systems are managed and controlled in a ground centralized manner, and all satellite nodes in the systems are generally managed and controlled in a unified manner by main and standby ground gateway stations. The method is simple to realize, but for short real-time or frequent signaling interaction services, as the satellite terminal needs to interact with the ground gateway station through one or more hops for each signaling interaction, the time delay is longer, and precious service bandwidth resources are occupied, the structure is mainly used for constellations with few satellites and preplanned services as the main.
In addition, the existing satellite communication system manages a single constellation, and does not have the comprehensive management capability of multiple constellations.
Disclosure of Invention
In view of this, the invention provides a multi-satellite multi-orbit global interconnection broadband satellite communication system, which can be used for realizing a broadband satellite communication system of high-low orbit hybrid networking, can adapt to different orbit characteristics, and can realize flexible networking.
In order to achieve the purpose, the invention adopts the technical scheme that:
a multi-satellite multi-orbit global interconnection broadband satellite communication system comprises a geostationary orbit satellite constellation, an inclined synchronous orbit satellite constellation, a medium and low orbit satellite constellation, a ground gateway station and a ground bearing network, wherein a network management center is deployed in the ground gateway station; each satellite node in the constellation has on-satellite processing capacity and is interconnected through an inter-satellite link and a satellite-ground feed link; the constellations are interconnected through a ground bearing network; the network management and control of the broadband satellite communication system comprises a control surface and a management surface, wherein the control surface is independently controlled by each constellation, and the management surface performs centralized management on each constellation; wherein:
the geostationary orbit satellite constellation adopts a satellite-ground backup and multi-satellite cooperative architecture, a satellite deploys a satellite-borne network control, and a ground gateway station deploys a ground network control, and the functions of the satellite-borne network control and the ground gateway station are kept consistent; the satellite-borne network control and the ground network control of each satellite are interconnected through a satellite-ground feed link and work in a main and standby mode;
the method comprises the following steps that a satellite constellation with an inclined synchronous orbit and a satellite constellation with a medium and low orbit adopt a satellite-ground cooperative architecture, a ground gateway station deploys ground network control, and satellite terminals under coverage areas of all satellites in the constellation are managed in a centralized mode; each satellite deploys satellite-borne network control to manage the wave beam, frequency and time slot resources of the satellite; the ground network control and each satellite-borne network control are interconnected through a satellite-ground feed link and an inter-satellite link and work in a cooperative mode;
the network management center performs centralized management on each constellation, the network management center and each constellation are interconnected through a ground bearing network, and each constellation reports the network operation situation to the network management center and receives the unified scheduling of the network management center.
Furthermore, in a stationary orbit satellite constellation, the main and standby roles of a satellite-borne network control and a ground network control are determined in a manual designation or automatic election mode; if the satellite-borne network control or the ground network control is determined to be a main role, managing wave beams, frequency and time slot resources of a deployed satellite and network access and same-satellite service connection of all satellite terminals under the satellite coverage area, and representing the satellite to cooperate with the main role network control of other satellites in a constellation to complete cross-satellite service connection and cross-satellite switching; if the satellite-borne network control or the ground network control is determined to be the backup role, the state synchronization with the main role network control is kept.
Furthermore, in the oblique synchronous orbit satellite constellation and the middle and low orbit satellite constellation, the ground network control is responsible for network access, same satellite and cross-satellite service connection and cross-satellite switching work of satellite terminals under all satellite coverage areas in the constellation, when resources are required to be allocated for the satellite terminals, the ground network control submits resource requirements to the satellite-borne network control of the satellite terminals which are currently accessed to the satellites, and the satellite-borne network control of the satellites allocates wave beam, frequency and time slot resources for the satellite terminals.
Further, the network management center is responsible for organizing the interconnection and intercommunication of the services among the constellations, and the specific mode is as follows:
A. the network management center configures a ground gateway station for service interconnection for each constellation;
B. after the satellite terminal accesses the network, reporting the terminal online state to a network management center by the satellite-borne network control of the constellation in which the satellite terminal is positioned, wherein the terminal online state comprises the address of the satellite terminal, the current constellation and the current access satellite;
C. during service communication, if the satellite terminal and the opposite communication terminal are not in the same constellation, the network control of the constellation where the satellite terminal is located initiates interconnection inquiry to the network management center;
D. the network management center replies a ground gateway station and an opposite-end outgoing number to the satellite-borne network control of the constellation where the satellite terminal is located according to the recorded online state of the opposite-end communication;
F. the satellite-borne network control of the constellation in which the satellite terminal is located establishes a service link from the satellite terminal to the ground gateway station and sends an opposite-end outgoing number to the ground gateway station;
G. the landing gateway station decides to be initiated by the station according to the outgoing number of the opposite terminal or is switched to other landing gateway stations through a ground bearing network to initiate service call to the opposite communication terminal;
H. and the satellite-borne network control of the constellation where the communication opposite end is located establishes a service link from the ground gateway station to the communication opposite end, and completes interconnection and intercommunication of the service between the constellations.
Further, the network management center is responsible for organizing roaming of the satellite terminal among constellations, and the specific mode is as follows:
A. the network management center gives a constellation-crossing suggestion of the satellite terminal according to the link quality and the service load statistics of the satellite terminal, and the suggestion is sent to the satellite terminal through the satellite-borne network of the current constellation;
B. the satellite terminal receives the constellation crossing suggestion, searches available satellites under a target constellation, and then initiates a roaming application to a satellite-borne network control of the current constellation, wherein the roaming application comprises the target constellation and available satellite information;
C. the satellite-borne network control of the current constellation sends the roaming application to a network management center, and the network management center informs the satellite-borne network control of the target constellation to execute pre-network access on the available satellite for the satellite terminal;
D. the network management center selects the floor gateway stations for the current constellation and the target constellation respectively, and establishes a service transmission tunnel between the current constellation floor gateway station and the target constellation floor gateway station; the selected information of the landing gateway station is respectively sent to the satellite-borne network control of the current constellation and the target constellation;
E. the satellite-borne network control of the target constellation establishes a service link from the target constellation to a target constellation ground gateway for the satellite terminal;
F. the satellite-borne network control of the current constellation establishes a service link from the current constellation to the current constellation landing gateway station for the opposite communication end of the satellite terminal in the current constellation;
G. the network management center issues pre-network access information and service link information of the satellite terminal under a target constellation to a satellite-borne network control of the current constellation;
H. the satellite-borne network control of the current constellation issues pre-network access information and service link information under a target constellation to a satellite terminal, and issues service link information under the current constellation to a communication opposite end of the satellite terminal;
I. the satellite terminal roams to a target constellation.
Compared with the background technology, the invention has the following beneficial effects:
1. the system of the invention distinguishes a control plane and a management plane, flexibly selects a networking architecture and a satellite-ground cooperation mode aiming at different orbital characteristics at the control plane, and carries out centralized management and unified scheduling on heterogeneous satellite constellations at the management plane, thereby effectively improving the expansion capability of the satellite internet to satellite resources.
2. The method for service interconnection and intercommunication among constellations and cross-constellation roaming of the satellite terminal can realize the integration of heterogeneous constellation resources, ensure that the interference response and the service sharing are rapidly carried out under the condition that a single constellation is disturbed or overloaded, and effectively improve the networking efficiency and the anti-interference and traffic-guaranteeing capability of the satellite internet.
Drawings
Fig. 1 is a schematic structural diagram of a multi-satellite multi-orbit global interconnection broadband satellite communication system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the communication between the stationary orbit constellation of FIG. 1 and a ground-based carrier network;
FIG. 3 is a schematic diagram of the communication between the inclined synchronous orbit constellation and the ground bearing network in FIG. 1;
fig. 4 is a schematic communication diagram of the medium-low constellation and the ground-based carrier network in fig. 1;
fig. 5 is a flowchart of inter-constellation service interconnection and interworking management in an embodiment of the present invention;
fig. 6 is a flowchart illustrating inter-constellation satellite terminal roaming management according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
A multi-satellite multi-orbit global interconnection broadband satellite communication system is shown in figures 1-4, and comprises a plurality of constellations such as a geostationary orbit satellite constellation, an inclined synchronous orbit satellite constellation, a medium and low orbit satellite constellation and the like, a ground gateway station and a ground bearing network; each satellite node in the constellation has on-satellite processing capacity and is interconnected through an inter-satellite link and a satellite-ground feed link; the constellations are interconnected through a ground bearing network. The network management and control of the system comprises a control plane and a management plane, wherein the control plane is independently controlled by each constellation; the management plane performs centralized management on each constellation.
In the control plane, for the stationary orbit satellite constellation, a structure of 'star-ground backup and multi-star cooperation' is adopted. Satellite deployment satellite-borne network control; the ground gateway station deploys a ground network control and keeps consistent with the function of the satellite-borne network control. The satellite-borne network control and the ground network control of each satellite are interconnected through a satellite-ground feed link and work in a main and standby mode.
The main and standby roles of the satellite-borne network control and the ground network control are determined in a manual designation or automatic election mode. If the satellite-borne network control (or the ground network control) is determined to be a main role, resources such as wave beams, frequency, time slots and the like of a deployed satellite and network access and same-satellite service connection of all satellite terminals under the satellite coverage area are managed, and the satellite is coordinated with the main role network control of other satellites in a constellation to complete cross-satellite service connection and cross-satellite switching; if the satellite-borne network control (or the ground network control) determines that the role is the backup role, the state synchronization with the main role network control is kept.
In the control plane, a 'satellite-ground cooperation' architecture is adopted for a tilt synchronous orbit satellite constellation or a medium-low orbit satellite constellation. The ground gateway station deploys a ground network control to perform centralized management on satellite terminals under all satellite coverage areas in a constellation; each satellite deploys a satellite-borne network control to manage resources such as wave beams, frequencies, time slots and the like of the satellite. The ground network control and each satellite-borne network control are interconnected through a satellite-ground feed link and an inter-satellite link (when necessary), and work in a cooperative mode is adopted.
The ground network control is responsible for network access, same satellite and cross-satellite service connection and cross-satellite switching work of the satellite terminals under all satellite coverage areas in a constellation, when resources are required to be allocated for the satellite terminals, the ground network control submits resource requirements to the satellite-borne network control of the satellite terminals which are currently accessed to the satellites, and the satellite-borne network control of the satellites allocates resources such as wave beams, frequency, time slots and the like for the satellite terminals.
And on the management side, a network management center is deployed to perform centralized management on each constellation. The network management center is interconnected with each constellation through a ground bearing network; each constellation reports the network operation situation to the network management center and receives the unified scheduling of the network management center.
The network management center is responsible for organizing interconnection and intercommunication of services among constellations, and as shown in fig. 5, the specific steps are as follows:
A. the network management center configures a ground gateway station for service interconnection for each constellation;
B. after the satellite terminal accesses the network, the terminal online state is reported to a network management center by the network control of the constellation in which the satellite terminal is located, wherein the terminal online state comprises the address of the satellite terminal, the current constellation, the current access satellite and the like;
C. during service communication, if the satellite terminal and the opposite communication terminal are not in the same constellation, the network control of the constellation where the satellite terminal is located initiates interconnection inquiry to the network management center;
D. the network management center replies a ground gateway station and an opposite-end outgoing number to the network control of the constellation where the satellite terminal is located according to the recorded online state of the opposite communication end;
F. the network control of the constellation where the satellite terminal is located establishes a service link from the satellite terminal to the landing gateway station, and sends an opposite-end outgoing number to the landing gateway station;
G. the landing gateway station decides to be initiated by the station according to the outgoing number of the opposite terminal or is switched to other landing gateway stations through a ground bearing network to initiate service call to the opposite communication terminal;
H. and establishing a service link from the floor gateway station to the communication opposite end by the network control of the constellation in which the communication opposite end is positioned, and finishing the interconnection and intercommunication of the service among the constellations.
The network management center is also responsible for organizing roaming of the satellite terminal among constellations, as shown in fig. 6, the specific steps are as follows:
A. the network management center gives a constellation-crossing suggestion of the satellite terminal according to the link quality and the service load statistics of the satellite terminal, and sends the suggestion to the satellite terminal through the network of the current constellation;
B. the satellite terminal receives the constellation crossing suggestion, and after an available satellite is searched under a target constellation, a roaming application is initiated to the network control of the current constellation, wherein the roaming application comprises the target constellation and the available satellite information;
C. the network control of the current constellation sends the roaming application to a network management center, and the network management center informs the network control of the target constellation to execute pre-network access on the available satellite for the satellite terminal;
D. the network management center selects the landing gateway stations for the current constellation and the target constellation respectively, and establishes a service transmission tunnel between the current constellation landing gateway station and the target constellation landing gateway station; the selected information of the landing gateway station is respectively sent to the network control of the current constellation and the target constellation;
E. the network control of the target constellation establishes a ground link from the target constellation to a ground gateway of the target constellation for the satellite terminal;
F. the network control of the current constellation establishes a landing link from the current constellation to a landing gateway station of the current constellation for a communication opposite end of the satellite terminal in the current constellation;
G. the network management center sends pre-network access information and landing link information of the satellite terminal under a target constellation to the current constellation network control;
H. the network control of the current constellation issues pre-network access information and landing information under a target constellation to a satellite terminal; and down-sending landing information under the current constellation to the opposite communication terminal of the satellite terminal;
I. the satellite terminal roams to a target constellation.
In a word, the invention originally creates a multi-satellite multi-orbit global interconnection broadband satellite communication system, which divides the network control of a broadband satellite communication network into a control surface and a management surface, wherein the control surface is independently controlled by each constellation, the architecture of 'satellite-ground backup and multi-satellite cooperation' is adopted for the constellation of the geostationary orbit satellite according to the orbit characteristics, and the architecture of 'satellite-ground cooperation' is adopted for the constellation of the tilt synchronous orbit satellite and the constellation of the medium and low orbit satellite; the management surface performs centralized management on each constellation, and organizes interconnection and intercommunication of services among the constellations and cross-constellation roaming of the satellite terminal.
The invention can solve the problems of flexible networking and agile management and control of a broadband satellite communication network consisting of high-orbit satellite mixed constellations and low-orbit satellite mixed constellations, can realize a broadband satellite communication system of the high-orbit and low-orbit mixed networking, can adapt to different orbit characteristics, can carry out flexible networking, realizes roaming and service intercommunication of satellite terminals among heterogeneous constellations, and improves the expansion integration capability, the anti-interference and traffic-guaranteeing capability and the networking efficiency of the satellite network on satellite resources.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the above embodiments, or equivalent substitutions and modifications may be made to other features of the embodiments, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A multi-satellite multi-orbit global interconnection broadband satellite communication system is characterized by comprising a stationary orbit satellite constellation, an inclined synchronous orbit satellite constellation, a middle and low orbit satellite constellation, a ground gateway station and a ground bearing network, wherein a network management center is deployed in the ground gateway station; each satellite node in the constellation has on-satellite processing capacity and is interconnected through an inter-satellite link and a satellite-ground feed link; the constellations are interconnected through a ground bearing network; the network management and control of the broadband satellite communication system comprises a control surface and a management surface, wherein the control surface is independently controlled by each constellation, and the management surface performs centralized management on each constellation; wherein:
the geostationary orbit satellite constellation adopts a satellite-ground backup and multi-satellite cooperative architecture, a satellite deploys a satellite-borne network control, and a ground gateway station deploys a ground network control, and the functions of the satellite-borne network control and the ground gateway station are kept consistent; the satellite-borne network control and the ground network control of each satellite are interconnected through a satellite-ground feed link and work in a main and standby mode;
the method comprises the following steps that a satellite constellation with an inclined synchronous orbit and a satellite constellation with a medium and low orbit adopt a satellite-ground cooperative architecture, a ground gateway station deploys ground network control, and satellite terminals under coverage areas of all satellites in the constellation are managed in a centralized mode; each satellite deploys satellite-borne network control to manage the wave beam, frequency and time slot resources of the satellite; the ground network control and each satellite-borne network control are interconnected through a satellite-ground feed link and an inter-satellite link and work in a cooperative mode;
the network management center performs centralized management on each constellation, the network management center is interconnected with each constellation through a ground bearing network, and each constellation reports the network operation situation to the network management center and receives the unified scheduling of the network management center.
2. The multi-satellite multi-orbit global interconnection broadband satellite communication system according to claim 1, wherein in a geostationary orbit satellite constellation, the primary and backup roles of a satellite-borne network control and a ground network control are determined by manual designation or automatic election; if the satellite-borne network control or the ground network control is determined to be a main role, managing wave beams, frequency and time slot resources of a deployed satellite and network access and same-satellite service connection of all satellite terminals under the satellite coverage area, and representing the satellite to cooperate with the main role network control of other satellites in a constellation to complete cross-satellite service connection and cross-satellite switching; if the satellite-borne network control or the ground network control is determined to be the backup role, the state synchronization with the main role network control is kept.
3. The system according to claim 2, wherein in the oblique geosynchronous orbit satellite constellation and the medium-low orbit satellite constellation, the ground network is responsible for network access, same-satellite and cross-satellite service connection and cross-satellite switching of satellite terminals under coverage of all satellites in the constellation, when resources need to be allocated to the satellite terminals, the ground network is controlled to submit resource demands to the satellite network control of the satellite terminals currently accessed to the satellites, and the satellite network control of the satellite allocates beam, frequency and time slot resources to the satellite terminals.
4. The system according to claim 3, wherein the network management center is responsible for organizing the interconnection and interworking of services among the constellations by:
A. the network management center configures a ground gateway station for service interconnection for each constellation;
B. after the satellite terminal accesses the network, reporting the terminal online state to a network management center by the satellite-borne network control of the constellation in which the satellite terminal is positioned, wherein the terminal online state comprises the address of the satellite terminal, the current constellation and the current access satellite;
C. during service communication, if the satellite terminal and the opposite communication terminal are not in the same constellation, the network control of the constellation in which the satellite terminal is located initiates interconnection inquiry to the network management center;
D. the network management center replies a ground gateway station and an opposite-end outgoing number to the satellite-borne network control of the constellation where the satellite terminal is located according to the recorded online state of the opposite-end communication;
F. the satellite-borne network control of the constellation in which the satellite terminal is located establishes a service link from the satellite terminal to the ground gateway station and sends an opposite-end outgoing number to the ground gateway station;
G. the landing gateway station decides to be initiated by the station according to the outgoing number of the opposite terminal or is switched to other landing gateway stations through a ground bearing network to initiate service call to the opposite communication terminal;
H. and the satellite-borne network control of the constellation where the communication opposite end is located establishes a service link from the ground gateway station to the communication opposite end, and completes interconnection and intercommunication of the service between the constellations.
5. The system according to claim 3, wherein the network management center is responsible for organizing roaming of the satellite terminals among the constellations by:
A. the network management center gives a constellation-crossing suggestion of the satellite terminal according to the link quality and the service load statistics of the satellite terminal, and the suggestion is sent to the satellite terminal through the satellite-borne network of the current constellation;
B. the satellite terminal receives the constellation crossing suggestion, searches available satellites under a target constellation, and then initiates a roaming application to a satellite-borne network control of the current constellation, wherein the roaming application comprises the target constellation and available satellite information;
C. the satellite-borne network control of the current constellation sends the roaming application to a network management center, and the network management center informs the satellite-borne network control of the target constellation to execute pre-network access on the available satellite for the satellite terminal;
D. the network management center selects the floor gateway stations for the current constellation and the target constellation respectively, and establishes a service transmission tunnel between the current constellation floor gateway station and the target constellation floor gateway station; the selected information of the landing gateway station is respectively sent to the satellite-borne network control of the current constellation and the target constellation;
E. the satellite-borne network control of the target constellation establishes a service link from the target constellation to a target constellation landing gateway for the satellite terminal;
F. the satellite-borne network control of the current constellation establishes a service link from the current constellation to the floor gateway station of the current constellation for the opposite communication end of the satellite terminal in the current constellation;
G. the network management center issues pre-network access information and service link information of the satellite terminal under a target constellation to a satellite-borne network control of the current constellation;
H. the satellite-borne network control of the current constellation issues pre-network access information and service link information under a target constellation to a satellite terminal, and issues service link information under the current constellation to a communication opposite end of the satellite terminal;
I. the satellite terminal roams to a target constellation.
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| WO2007082719A2 (en) * | 2006-01-18 | 2007-07-26 | Overhorizon (Cyprus) Plc | Systems and methods for satellite communications with mobile terrestrial terminals |
| US20070178833A1 (en) * | 2006-01-18 | 2007-08-02 | Per Wahlberg | Systems and methods for satellite communications with mobile terrestrial terminals |
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