CN117318794B - GEO star-ground integrated network cross-domain route aggregation method - Google Patents
GEO star-ground integrated network cross-domain route aggregation method Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/04—Interdomain routing, e.g. hierarchical routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a GEO star-ground integrated network cross-domain route aggregation method, which comprises the following steps: the GEO satellite-ground integrated network is divided into a ground network domain and a satellite network domain, and the ground autonomous domain generates an aggregation routing table and transmits the aggregation routing table to a gateway station of a GEO satellite covering the autonomous domain; the gateway station reads and aggregates all the ground autonomous domain aggregation routing tables and uploads the internal aggregation routing tables to the GEO satellite; generating a GEO satellite aggregation routing table of the GEO satellite by the GEO satellite, and sending the table to the neighbor GEO satellite; each GEO satellite reads and aggregates the GEO satellite aggregation routing table to generate a GEO satellite internal routing table, and transmits the GEO satellite internal routing table to the affiliated gateway station; the gateway station updates the internal aggregation routing table, and performs full-network topology announcement in the ground network domain to complete the global routing construction of satellite-ground integration. The invention has the characteristics of low complexity and high adaptability, and can reduce the consumption of resources and the processing pressure on the satellite.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a GEO satellite-ground integrated network cross-domain route aggregation method.
Background
With the development of technology and the diversification of application requirements, satellite networks with single functions and operation depending on the ground can not meet the real-time and comprehensive service requirements of people, and satellite-ground integrated networks with multiple functions, high autonomy and convenient expansion become a new development direction.
The high cost and environmental constraints of aerospace devices require that satellite communication devices have the characteristics of small size, light weight, low power consumption and high performance. Under the condition, the on-board route switching hardware resources, the power consumption and the size are limited, so that the calculation capacity and the storage capacity on the satellite are greatly limited, and in the satellite-ground integrated network, if the large-scale route information of the ground network is diffused into the satellite network, the storage and the calculation of the on-board router are greatly burdened, and the frequent route change influence of the satellite network is brought into the ground network by adopting the route of the joint domain, so that unnecessary route oscillation and cost are brought.
The ground network is a ubiquitous network, each node runs a routing protocol to perform distributed computation, and each node has routing information of the area where the node is located. However, there are only a certain number of gateway stations connected to the satellite. Therefore, each gateway station aggregates all the routing information of the area where the gateway station is located, and forms a new routing table by adopting a characterization mode of the satellite network so as to perform routing with the satellite network domain. And otherwise, the satellite routing information is aggregated and redistributed, and the routing exchange is carried out with the ground network domain.
Therefore, researches are urgently needed to provide a star-ground integrated network architecture capable of effectively suppressing route information diffusion and a simple and efficient star-ground cross-domain route aggregation method, and a star-ground integrated global route is established on the premise of achieving route weight reduction.
Disclosure of Invention
The invention aims to solve the technical problem of providing a GEO star-to-ground integrated network cross-domain route aggregation method, wherein the GEO star-to-ground integrated network adopts a method for dividing an autonomous domain to divide a system into a ground network domain and a satellite network domain; the satellite network domain comprises a plurality of GEO satellites and an interface part for connecting the satellites with the gateway station; the ground network domain comprises a ground communication network and an interface part for connecting the ground communication network with the gateway station, the ground network domain is divided into a plurality of ground autonomous domains, and each ground autonomous domain comprises a plurality of ground network node routers, mobile communication base stations, user fixed terminals and user mobile terminals; and each ground autonomous domain in the coverage area of any GEO satellite communicates with the GEO satellite through the gateway station to which the GEO satellite belongs.
In order to solve the technical problems, the embodiment of the invention discloses a GEO star-to-ground integrated network cross-domain route aggregation method, which comprises the following steps:
s1, dividing a GEO satellite-ground integrated network to obtain a ground network domain and a satellite network domain;
the ground network domain comprises a ground communication network and an interface for connecting the ground communication network with a gateway station;
the satellite network domain comprises N GEO satellites and interfaces for connecting each GEO satellite with a gateway station, wherein N is an integer;
s2, dividing the ground network domains to obtain M ground autonomous domains, wherein M is an integer, and each ground autonomous domain comprises a plurality of ground network node routers, a mobile communication base station, a user fixed terminal and a user mobile terminal;
a unique gateway station to which each GEO satellite belongs exists in the coverage area of each GEO satellite;
each ground autonomous domain in each GEO satellite coverage domain communicates with the GEO satellite by using a gateway station to which the GEO satellite belongs;
s3, in the ground network domain, each ground autonomous domain generates a ground autonomous domain aggregation routing table and sends the ground autonomous domain aggregation routing table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain;
s4, generating an internal aggregation routing table of the gateway station by the gateway station corresponding to the GEO satellite, and sending the internal aggregation routing table to the GEO satellite, wherein the GEO satellite only receives the internal aggregation routing table from the gateway station to which the GEO satellite belongs and generates the GEO satellite aggregation routing table;
the GEO satellite aggregation routing table comprises a destination node IP address of a data packet and an interface address of a next hop gateway station;
s5, in the satellite network domain, the GEO satellite confirms the connection relation with the neighbor GEO satellite through an inter-satellite link, and sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table;
s6, the GEO satellite receives the GEO satellite aggregation routing table sent by the neighbor GEO satellite, generates a GEO satellite internal routing table, and sends the GEO satellite internal routing table to a gateway station to which the GEO satellite belongs;
s7, reading and aggregating the internal routing table of the GEO satellite by the gateway station to which the GEO satellite belongs, and updating the internal aggregation routing table of the gateway station to which the GEO satellite belongs;
and S8, adding an internal aggregation routing table of the gateway station of the GEO satellite to an internal link state information notice of a ground network domain, carrying out full-network topology notice, and sending to all nodes in the ground network domain, wherein after receiving the link state information notice, all nodes in the ground network domain update the own routing table to obtain a path from the node to any node in the full network, thereby realizing GEO satellite-ground integrated network cross-domain routing aggregation.
In an optional implementation manner, in an embodiment of the present invention, each ground autonomous domain generates a ground autonomous domain aggregation routing table, and sends the ground autonomous domain aggregation routing table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain, where the gateway station includes:
s31, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the autonomous domain based on an OSPF routing table in each ground network node router;
the ground autonomous domain aggregation routing table comprises a local ground autonomous domain interface IP address Router-ID and all contained destination node IP addresses;
s32, each ground autonomous domain transmits the ground autonomous domain aggregation routing table to a gateway station corresponding to the GEO satellite covering the ground autonomous domain.
In an optional implementation manner, in an embodiment of the present invention, the gateway station corresponding to the GEO satellite generates an internal aggregation routing table of the gateway station and sends the aggregation routing table to the GEO satellite, where the method includes:
s41, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables, and generates an internal aggregation routing table of the gateway station;
the gateway station internal aggregation routing table comprises interface IP addresses GW-ID of the gateway station and all destination node IP addresses in the coverage area;
s42, the gateway station corresponding to the GEO satellite transmits the aggregation routing table in the gateway station to the GEO satellite.
As an optional implementation manner, in this embodiment of the present invention, the GEO satellite confirms a connection relationship with a neighboring GEO satellite through an inter-satellite link, and sends its own GEO satellite aggregation routing table to the neighboring GEO satellite, so as to complete advertising of the GEO satellite aggregation routing table, including:
s51, the GEO satellite sends a one-hop Hello packet to the neighbor GEO satellite through an inter-satellite link, and the connection relation is confirmed;
s52, the GEO satellite sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table.
As an optional implementation manner, in an embodiment of the present invention, the GEO satellite receives a GEO satellite aggregation routing table sent by a neighboring GEO satellite, generates a GEO satellite internal routing table, and sends the GEO satellite internal routing table to a gateway station to which the GEO satellite belongs, where the method includes:
s61, the GEO satellite receives a GEO satellite aggregation routing table sent by a neighbor GEO satellite, reads and aggregates the GEO satellite aggregation routing table, and generates a GEO satellite internal routing table;
the GEO satellite internal routing table comprises destination node IP addresses of all ground network domains and corresponding interface addresses of next-hop gateway stations or next-hop GEO satellite addresses;
s62, the GEO satellite sends the data packet sent to the destination node of the non-satellite coverage area to the corresponding gateway station according to the next-hop GEO satellite address, and the routing of the data packet is completed;
and S63, the GEO satellite sends the internal routing table of the GEO satellite to a gateway station to which the GEO satellite belongs.
In an embodiment of the present invention, the gateway station to which the GEO satellite belongs forwards the data packet with the destination node being the non-own satellite coverage domain to the GEO satellite to which the GEO satellite belongs according to the aggregation routing table in the gateway station, so as to implement the data packet routing across the coverage domain.
As an optional implementation manner, in this embodiment of the present invention, the generating, based on the OSPF routing table in each terrestrial network node router, a terrestrial autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the terrestrial autonomous domain includes:
s311, each ground autonomous domain runs an OSPF protocol, link state information is exchanged among the ground network node routers, so that each ground network node router obtains the link state information of the whole ground communication network, and an OSPF routing table of each ground network node router is generated;
the OSPF routing table comprises a destination node IP address and a detailed path reaching the destination node IP address;
s312, each ground autonomous domain extracts the OSPF routing table to obtain a local ground autonomous domain interface IP address Router-ID and all the contained destination node IP addresses;
s313, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the autonomous domain according to each ground autonomous domain interface IP address Router-ID and all contained destination node IP addresses;
the ground autonomous domain aggregation routing table is as follows:
wherein Router-ID represents the IP address of the ground autonomous domain interface, IPi represents the IP address of the i-th destination node, i=1, 2, …, n, n represents the total number of destination nodes contained in the ground autonomous domain, and AS represents the ground autonomous domain aggregation routing table.
As an optional implementation manner, in this embodiment of the present invention, the gateway station corresponding to the GEO satellite obtains all the ground autonomous domain aggregation routing tables in the coverage area to which the gateway station belongs, and reads and aggregates the ground autonomous domain aggregation routing tables to generate an aggregation routing table in the gateway station, including:
s411, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables to obtain the interface IP address GW-ID of the gateway station in the coverage area and all the destination node IP addresses in the coverage area which can be reached by the gateway station;
s412, generating an internal aggregation routing table of the gateway station according to the gateway station interface IP address GW-ID and all the destination node IP addresses in the coverage area by the gateway station corresponding to the GEO satellite;
the aggregation routing table in the gateway station is as follows:
wherein GW-ID represents interface IP address of gateway station connected with GEO satellite, IPi represents IP address of ith destination node, n represents total number of destination nodes contained in coverage domain, GW represents internal aggregation route table of gateway station.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
(1) The invention adopts a system architecture for dividing the autonomous domain, can isolate the route information diffusion among the satellite-ground autonomous domains, and effectively reduces the resource waste of the satellite network domain;
(2) The invention has the design of a lightweight route aggregation method with low complexity, can reduce the cost of route signaling and lighten the processing pressure on the satellite;
(3) The invention designs a dynamic inter-satellite route updating mechanism, realizes mutual confirmation of connection states among satellites, achieves the purpose of updating route information, and has better dynamic adaptability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow diagram of a GEO-star-earth integrated network cross-domain route aggregation method disclosed in the embodiment of the present invention;
fig. 2 is a schematic flow chart of another GEO-star-earth integrated network cross-domain route aggregation method disclosed in the embodiment of the present invention.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not limited to the list of steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention discloses a GEO star-ground integrated network cross-domain route aggregation method, which comprises the following steps: the GEO satellite-ground integrated network is divided into a ground network domain and a satellite network domain, and the ground autonomous domain generates an aggregation routing table and transmits the aggregation routing table to a gateway station of a GEO satellite covering the autonomous domain; the gateway station reads and aggregates all the ground autonomous domain aggregation routing tables and uploads the internal aggregation routing tables to the GEO satellite; generating a GEO satellite aggregation routing table of the GEO satellite by the GEO satellite, and sending the table to the neighbor GEO satellite; each GEO satellite reads and aggregates the GEO satellite aggregation routing table to generate a GEO satellite internal routing table, and transmits the GEO satellite internal routing table to the affiliated gateway station; the gateway station updates the internal aggregation routing table, and performs full-network topology announcement in the ground network domain to complete the global routing construction of satellite-ground integration. The invention has the characteristics of low complexity and high adaptability, and can reduce the consumption of resources and the processing pressure on the satellite. The following will describe in detail.
Examples
Referring to fig. 1, fig. 1 is a flow chart of a GEO (geostationary orbit Geostationary Orbit, GEO) star-earth integrated network cross-domain route aggregation method according to an embodiment of the present invention. The GEO-satellite-to-ground integrated network cross-domain route aggregation method described in fig. 1 is applied to the technical field of satellite communication, and realizes the star-to-ground cross-domain route aggregation, and the embodiment of the invention is not limited. As shown in fig. 1, the GEO-star-to-ground integrated network cross-domain route aggregation method may include the following operations:
s1, dividing a GEO satellite-ground integrated network to obtain a ground network domain and a satellite network domain;
the ground network domain comprises a ground communication network and an interface for connecting the ground communication network with a gateway station;
the satellite network domain comprises N GEO satellites and interfaces for connecting each GEO satellite with a gateway station, wherein N is an integer;
s2, dividing the ground network domains to obtain M ground autonomous domains, wherein M is an integer, and each ground autonomous domain comprises a plurality of ground network node routers, a mobile communication base station, a user fixed terminal and a user mobile terminal;
a unique gateway station to which each GEO satellite belongs exists in the coverage area of each GEO satellite;
each ground autonomous domain in each GEO satellite coverage domain communicates with the GEO satellite by using a gateway station to which the GEO satellite belongs;
and each ground autonomous domain in the coverage area of any GEO satellite communicates with the GEO satellite through the gateway station to which the GEO satellite belongs.
S3, in the ground network domain, each ground autonomous domain generates a ground autonomous domain aggregation routing table and sends the ground autonomous domain aggregation routing table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain;
s4, generating an internal aggregation routing table of the gateway station by the gateway station corresponding to the GEO satellite, and sending the internal aggregation routing table to the GEO satellite, wherein the GEO satellite only receives the internal aggregation routing table from the gateway station to which the GEO satellite belongs and generates the GEO satellite aggregation routing table;
the GEO satellite aggregation routing table comprises a destination node IP address of a data packet and an interface address of a next hop gateway station;
s5, in the satellite network domain, the GEO satellite confirms the connection relation with the neighbor GEO satellite through an inter-satellite link, and sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table;
s6, the GEO satellite receives the GEO satellite aggregation routing table sent by the neighbor GEO satellite, generates a GEO satellite internal routing table, and sends the GEO satellite internal routing table to a gateway station to which the GEO satellite belongs;
s7, reading and aggregating the internal routing table of the GEO satellite by the gateway station to which the GEO satellite belongs, and updating the internal aggregation routing table of the gateway station to which the GEO satellite belongs;
and S8, adding an internal aggregation routing table of the gateway station of the GEO satellite to an internal link state information notice of a ground network domain, carrying out full-network topology notice, and sending to all nodes in the ground network domain, wherein after receiving the link state information notice, all nodes in the ground network domain update the own routing table to obtain a path from the node to any node in the full network, thereby realizing GEO satellite-ground integrated network cross-domain routing aggregation.
Optionally, each ground autonomous domain generates a ground autonomous domain aggregation routing table, and sends the ground autonomous domain aggregation routing table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain, including:
s31, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the ground autonomous domain based on an open shortest path first (Open Shortest Path First, OSPF) routing table in each ground network node router;
the ground autonomous domain aggregation routing table comprises a local ground autonomous domain interface IP address Router-ID (which represents the IP address of the ground autonomous domain interface) and all the contained destination node IP addresses;
s32, each ground autonomous domain transmits the ground autonomous domain aggregation routing table to a gateway station corresponding to the GEO satellite covering the ground autonomous domain.
Optionally, the gateway station corresponding to the GEO satellite generates an internal aggregation routing table of the gateway station and sends the aggregation routing table to the GEO satellite, which includes:
s41, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables, and generates an internal aggregation routing table of the gateway station;
the aggregation routing table in the gateway station comprises an interface IP address GW-ID (GW-ID represents the interface IP address of the gateway station connected with the GEO satellite and can be understood as a symbol representation) of the gateway station and all the IP addresses of the destination nodes in the coverage area;
optionally, each autonomous domain on the ground sends the respective ground autonomous domain aggregation routing table to the affiliated gateway station, the gateway station reads all the ground autonomous domain aggregation routing tables, extracts all the IP addresses, can obtain the IP addresses of all the destination nodes in the coverage area reachable by the gateway station, extracts the interface IP address connected with the GEO satellite, namely GW-ID, can obtain the interface IP address which should be forwarded by the destination node corresponding to the gateway station, synthesizes all the destination node IP addresses and GW-ID addresses in the coverage area reachable by the gateway station, generates the gateway station internal aggregation routing table, and the gateway station internal aggregation routing table can clearly express the gateway station interface IP address which should be sent by the destination node.
S42, the gateway station corresponding to the GEO satellite transmits the aggregation routing table in the gateway station to the GEO satellite.
Optionally, the GEO satellite confirms a connection relationship with a neighboring GEO satellite through an inter-satellite link, and sends a GEO satellite aggregation routing table of the GEO satellite to the neighboring GEO satellite, completing advertising of the GEO satellite aggregation routing table, including:
s51, the GEO satellite sends a one-hop Hello packet to the neighbor GEO satellite through an inter-satellite link, and the connection relation is confirmed;
s52, the GEO satellite sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table.
Optionally, the GEO satellite receives a GEO satellite aggregation routing table sent by a neighbor GEO satellite, generates a GEO satellite internal routing table, and sends the GEO satellite internal routing table to a gateway station to which the GEO satellite belongs, including:
s61, the GEO satellite receives a GEO satellite aggregation routing table sent by a neighbor GEO satellite, reads and aggregates the GEO satellite aggregation routing table, and generates a GEO satellite internal routing table;
the GEO satellite internal routing table comprises destination node IP addresses of all ground network domains and corresponding interface addresses of next-hop gateway stations or next-hop GEO satellite addresses;
s62, the GEO satellite sends the data packet sent to the destination node of the non-satellite coverage area to the corresponding gateway station according to the next-hop GEO satellite address, and the routing of the data packet is completed;
and S63, the GEO satellite sends the internal routing table of the GEO satellite to a gateway station to which the GEO satellite belongs.
Optionally, the gateway station to which the GEO satellite belongs forwards the data packet with the destination node being the non-own satellite coverage domain to the GEO satellite to which the GEO satellite belongs according to the aggregation routing table in the gateway station, so as to realize the data packet routing across the coverage domain.
Optionally, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO-satellite corresponding gateway station covering the ground autonomous domain based on the OSPF routing table in each ground network node router, including:
s311, each ground autonomous domain runs an OSPF protocol, link state information is exchanged among the ground network node routers, so that each ground network node router obtains the link state information of the whole ground communication network, and an OSPF routing table of each ground network node router is generated;
each ground network node router acquires link state information of the whole ground communication network and is used for calculating routing paths reaching other destination nodes;
the OSPF routing table comprises a destination node IP address and a detailed path reaching the destination node IP address;
s312, each ground autonomous domain extracts the OSPF routing table to obtain a local ground autonomous domain interface IP address Router-ID and all the contained destination node IP addresses;
s313, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the autonomous domain according to each ground autonomous domain interface IP address Router-ID and all contained destination node IP addresses;
the ground autonomous domain aggregation routing table is as follows:
wherein Router-ID represents the IP address of the ground autonomous domain interface, IPi represents the IP address of the i-th destination node, i=1, 2, …, n, n represents the total number of destination nodes contained in the ground autonomous domain, and AS represents the ground autonomous domain aggregation routing table.
Optionally, each ground autonomous domain extracts the OSPF routing table, extracts all destination node IP addresses in the autonomous domain, can obtain all reachable destination nodes in the autonomous domain, extracts an IP address which can uniquely identify an interface of the local autonomous domain, namely Router-ID, can obtain an interface IP address entering the local autonomous domain, synthesizes all destination node IP addresses in the autonomous domain and Router-ID which uniquely identifies the local autonomous domain, generates a ground autonomous domain aggregation routing table to be sent to a gateway station corresponding to a GEO satellite in the local autonomous domain, and the ground autonomous domain aggregation routing table can clearly express the IP address of the autonomous domain interface which should be sent to reach a certain destination node.
Optionally, the gateway station corresponding to the GEO satellite obtains all the ground autonomous domain aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous domain aggregation routing tables to generate an internal aggregation routing table of the gateway station, including:
s411, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables to obtain the interface IP address GW-ID of the gateway station in the coverage area and all the destination node IP addresses in the coverage area which can be reached by the gateway station;
s412, generating an internal aggregation routing table of the gateway station according to the gateway station interface IP address GW-ID and all the destination node IP addresses in the coverage area by the gateway station corresponding to the GEO satellite;
the aggregation routing table in the gateway station is as follows:
wherein GW-ID represents interface IP address of gateway station connected with GEO satellite, IPi represents IP address of ith destination node, n represents total number of destination nodes contained in coverage domain, GW represents internal aggregation route table of gateway station. Fig. 2 is a schematic flow diagram of another GEO-star-to-ground integrated network cross-domain route aggregation method disclosed in the embodiment of the present invention; table 1 is a structure diagram of an internal aggregation routing table of a gateway station disclosed in the embodiment of the present invention; table 2 is a structure diagram of GEO satellite aggregation routing table disclosed in the embodiment of the present invention; table 3 is a structure diagram of GEO satellite internal routing tables disclosed in the embodiments of the present invention.
TABLE 1 aggregation routing table inside gateway station
| Destination | Next Hop |
| Node IP | GEO IP/Router-ID |
Table 2GEO satellite aggregation routing table
| Destination | Next Hop |
| Node IP | GW-ID |
TABLE 3GEO satellite internal routing table
| Destination | Next Hop |
| Node IP | GEO IP/GW-ID |
The apparatus embodiments described above are merely illustrative, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Finally, it should be noted that: the embodiment of the invention discloses a GEO star-earth integrated network cross-domain route aggregation method and device, which are disclosed by the embodiment of the invention and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. A GEO-satellite-to-ground integrated network cross-domain route aggregation method, the method comprising:
s1, dividing a GEO satellite-ground integrated network to obtain a ground network domain and a satellite network domain;
the ground network domain comprises a ground communication network and an interface for connecting the ground communication network with a gateway station;
the satellite network domain comprises N GEO satellites and interfaces for connecting each GEO satellite with a gateway station, wherein N is an integer;
s2, dividing the ground network domains to obtain M ground autonomous domains, wherein M is an integer, and each ground autonomous domain comprises a plurality of ground network node routers, a mobile communication base station, a user fixed terminal and a user mobile terminal;
a unique gateway station to which each GEO satellite belongs exists in the coverage area of each GEO satellite;
each ground autonomous domain in each GEO satellite coverage domain communicates with the GEO satellite by using a gateway station to which the GEO satellite belongs;
s3, in the ground network domain, each ground autonomous domain generates a ground autonomous domain aggregation routing table and sends the ground autonomous domain aggregation routing table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain;
s4, generating an internal aggregation routing table of the gateway station by the gateway station corresponding to the GEO satellite, and sending the internal aggregation routing table to the GEO satellite, wherein the GEO satellite only receives the internal aggregation routing table from the gateway station to which the GEO satellite belongs and generates the GEO satellite aggregation routing table;
the GEO satellite aggregation routing table comprises a destination node IP address of a data packet and an interface address of a next hop gateway station;
s5, in the satellite network domain, the GEO satellite confirms the connection relation with the neighbor GEO satellite through an inter-satellite link, and sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table;
s6, the GEO satellite receives the GEO satellite aggregation routing table sent by the neighbor GEO satellite, generates a GEO satellite internal routing table, and sends the GEO satellite internal routing table to a gateway station to which the GEO satellite belongs;
s7, reading and aggregating the internal routing table of the GEO satellite by the gateway station to which the GEO satellite belongs, and updating the internal aggregation routing table of the gateway station to which the GEO satellite belongs;
and S8, adding an internal aggregation routing table of the gateway station of the GEO satellite to an internal link state information notice of a ground network domain, carrying out full-network topology notice, and sending to all nodes in the ground network domain, wherein after receiving the link state information notice, all nodes in the ground network domain update the own routing table to obtain a path from the node to any node in the full network, thereby realizing GEO satellite-ground integrated network cross-domain routing aggregation.
2. The GEO-satellite-to-ground integrated network cross-domain route aggregation method of claim 1, wherein each ground autonomous domain generates a ground autonomous domain aggregation route table and transmits the ground autonomous domain aggregation route table to a gateway station corresponding to a GEO satellite covering the ground autonomous domain, comprising:
s31, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the autonomous domain based on an OSPF routing table in each ground network node router;
the ground autonomous domain aggregation routing table comprises a local ground autonomous domain interface IP address Router-ID and all contained destination node IP addresses;
s32, each ground autonomous domain transmits the ground autonomous domain aggregation routing table to a gateway station corresponding to the GEO satellite covering the ground autonomous domain.
3. The GEO-satellite-to-ground integrated network cross-domain route aggregation method of claim 2, wherein each ground autonomous domain generates a ground autonomous domain aggregate route table to be sent to GEO-satellite corresponding gateway stations covering the ground autonomous domain based on the OSPF route table in each ground network node router, comprising:
s311, each ground autonomous domain runs an OSPF protocol, link state information is exchanged among the ground network node routers, so that each ground network node router obtains the link state information of the whole ground communication network, and an OSPF routing table of each ground network node router is generated;
the OSPF routing table comprises a destination node IP address and a detailed path reaching the destination node IP address;
s312, each ground autonomous domain extracts the OSPF routing table to obtain a local ground autonomous domain interface IP address Router-ID and all the contained destination node IP addresses;
s313, each ground autonomous domain generates a ground autonomous domain aggregation routing table to be sent to a GEO satellite corresponding gateway station covering the autonomous domain according to each ground autonomous domain interface IP address Router-ID and all contained destination node IP addresses;
the ground autonomous domain aggregation routing table is as follows:
wherein Router-ID represents the IP address of the ground autonomous domain interface, IPi represents the IP address of the i-th destination node, i=1, 2, …, n, n represents the total number of destination nodes contained in the ground autonomous domain, and AS represents the ground autonomous domain aggregation routing table.
4. The GEO-satellite-to-ground integrated network cross-domain route aggregation method of claim 1, wherein the gateway station corresponding to the GEO satellite generates an intra-gateway station aggregation route table and transmits the intra-gateway station aggregation route table to the GEO satellite, comprising:
s41, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables, and generates an internal aggregation routing table of the gateway station;
the gateway station internal aggregation routing table comprises interface IP addresses GW-ID of the gateway station and all destination node IP addresses in the coverage area;
s42, the gateway station corresponding to the GEO satellite transmits the aggregation routing table in the gateway station to the GEO satellite.
5. The GEO-satellite-to-ground integrated network cross-domain route aggregation method of claim 4, wherein the gateway station corresponding to the GEO satellite obtains all ground autonomous domain aggregation route tables inside the coverage area to which it belongs, reads and aggregates the ground autonomous domain aggregation route tables to generate an intra-gateway station aggregation route table, comprising:
s411, the gateway station corresponding to the GEO satellite obtains all the ground autonomous region aggregation routing tables in the coverage area to which the gateway station belongs, reads and aggregates the ground autonomous region aggregation routing tables to obtain the interface IP address GW-ID of the gateway station in the coverage area and all the destination node IP addresses in the coverage area which can be reached by the gateway station;
s412, generating an internal aggregation routing table of the gateway station according to the gateway station interface IP address GW-ID and all the destination node IP addresses in the coverage area by the gateway station corresponding to the GEO satellite;
the aggregation routing table in the gateway station is as follows:
wherein GW-ID represents interface IP address of gateway station connected with GEO satellite, IPi represents IP address of ith destination node, n represents total number of destination nodes contained in coverage domain, GW represents internal aggregation route table of gateway station.
6. The GEO-satellite-to-earth integrated network cross-domain route aggregation method of claim 1, wherein the GEO satellite confirms a connection relationship with a neighbor GEO satellite through an inter-satellite link, and transmits its own GEO-satellite aggregation route table to the neighbor GEO satellite, completing advertising of the GEO-satellite aggregation route table, comprising:
s51, the GEO satellite sends a one-hop Hello packet to the neighbor GEO satellite through an inter-satellite link, and the connection relation is confirmed;
s52, the GEO satellite sends the GEO satellite aggregation routing table of the GEO satellite to the neighbor GEO satellite to finish the announcement of the GEO satellite aggregation routing table.
7. The GEO-satellite-to-earth integrated network cross-domain route aggregation method of claim 1, wherein the GEO satellite receiving a GEO-satellite aggregation route table sent by a neighboring GEO satellite, generating a GEO-satellite internal route table, and sending the GEO-satellite internal route table to a gateway station to which the GEO satellite belongs, comprises:
s61, the GEO satellite receives a GEO satellite aggregation routing table sent by a neighbor GEO satellite, reads and aggregates the GEO satellite aggregation routing table, and generates a GEO satellite internal routing table;
the GEO satellite internal routing table comprises destination node IP addresses of all ground network domains and corresponding interface addresses of next-hop gateway stations or next-hop GEO satellite addresses;
s62, the GEO satellite sends the data packet sent to the destination node of the non-satellite coverage area to the corresponding gateway station according to the next-hop GEO satellite address, and the routing of the data packet is completed;
and S63, the GEO satellite sends the internal routing table of the GEO satellite to a gateway station to which the GEO satellite belongs.
8. The GEO-satellite-to-earth integrated network cross-domain route aggregation method of claim 1, wherein the gateway station to which the GEO satellite belongs forwards the data packet with the destination node being a non-own satellite coverage domain to the GEO satellite to which the GEO satellite belongs according to the gateway station internal aggregation route table, thereby realizing the data packet route crossing the coverage domain.
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