CN117278094A - Global multi-layer address mapping method and system for satellite-borne comprehensive information network - Google Patents

Abstract

The invention provides a global multi-layer address mapping method and a system for a satellite-borne comprehensive information network, wherein the method comprises the following steps: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission; the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange; transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame; after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding; and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star. The invention can meet the requirements of physical links, network addressing and application matching layer integration high-efficiency data transmission among the star, the ground, the star and the star network.

Description

Global multi-layer address mapping method and system for satellite-borne comprehensive information network

Technical Field

The invention relates to the technical field of space and satellite-borne communication networks, in particular to a global multi-layer address mapping method and system for a satellite-borne comprehensive information network.

Background

The star-to-ground/inter-star network communication protocol and the on-board network communication protocol are key to the integration of the world and the earth. Although the CCSDS standard protocol is perfect in space application, the CCSDS standard protocol cannot be directly applied to internet communication based on the TCP/IP protocol on the ground, and has a protocol conversion problem. Therefore, it is necessary to optimize a multi-layer network protocol, build a unified protocol frame and standard specification based on the fusion of the conversion of the CCSDS protocol and the TCP/IP protocol, reduce the conversion links of the spatial protocol as much as possible, and improve the efficiency and reliability of the satellite-to-ground/inter-satellite transmission network.

According to the document retrieval of the prior art, space communication protocol design and application verification based on TCP/IP are carried out on part of spacecrafts at home and abroad, but the space communication protocol design and application verification are still in an exploration stage as a whole, and a mature solution is not formed yet.

The document with publication number CN111988229A, which is used for the compressed storage and the rapid searching system and the rapid searching method of the mapping table of the IP and the MAC address, discloses a mapping relation for storing the latest IP address and the latest MAC address in the network. The publication No. CN111131535A discloses a method for high-speed real-time communication between heterogeneous protocol networks, and provides a conversion method for UDP protocol of Ethernet transmission layer and dynamic address mapping protocol of rapidIO message. The documents of CN108965136A (forwarding method and device based on space network layering IP), CN106533536A (low orbit satellite network IP addressing method and device based on polar region), CN108881029A (low orbit satellite network addressing and routing method and system based on satellite-to-ground decoupling) disclose several addressing methods of each field of IP addresses so as to meet the requirements of satellite-to-ground and inter-satellite communication, but do not involve the analysis of the corresponding relation of each protocol layering address. The publication No. CN112865852 discloses a method for determining a physical link based on the position information of a destination address satellite in a routing method and routing equipment for addressing a network layer based on the space position information, and the corresponding relation between IP data packets of the network layer and a data link layer is established through the position relation between satellites and between the satellites and the ground.

The document (space route strategy design and analysis based on IPv6 and space packet protocol) (spacecraft engineering, volume 28, 3 rd phase) provides an IPv6 address format definition method, and establishes a one-to-one mapping relation between application process identifiers and IPv6 addresses.

Searching and analyzing the prior art can find that the following problems exist:

1) The existing method is generally aimed at specific space links and satellite-borne links, and is used for realizing address mapping and protocol conversion in a customized manner, so that the universality and the flexibility are insufficient, and a complete generalized address definition and mapping method is not built from a protocol system level;

2) The method for mapping the generalized address of the same protocol layer between the space link and the satellite-borne link protocol system is not proposed, so that the satellite-borne gateway and the ground gateway are often customized according to specific requirements, and the data interaction protocol conversion overhead is increased in the constellation networking interconnection application scene.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a global multi-layer address mapping method and system for a satellite-borne comprehensive information network.

The invention provides a global multi-layer address mapping method for a satellite-borne comprehensive information network, which comprises the following steps:

step S1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

Step S2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

step S3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

step S4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

step S5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

Preferably, the integrated information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

the physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at the application layer.

Preferably, in said step S1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

the satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol.

Preferably, in said step S2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

The multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

the IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

a transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

Preferably, in said step S3:

when the satellite-borne gateway or the ground gateway transmits data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents the current space link receiving end satellite or the ground station, and the destination IP address is the IP address of the transmission frame receiving end satellite or the ground station.

Preferably, in said step S4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the destination IP address in the transmission frame is the own satellite IP address subnet, the transmission frame is continuously forwarded to the destination terminal through the satellite-borne link subnet.

Preferably, in said step S5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

for time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

For a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.

The invention provides a global multi-layer address mapping system of a satellite-borne comprehensive information network, which comprises the following components:

module M1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

module M2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

module M3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

module M4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

module M5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

Preferably, the integrated information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

The physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at an application layer;

in the module M1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

the satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol;

In the module M2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

the multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

the IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

a transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

Preferably, in said module M3:

when the satellite-borne gateway or the ground gateway sends data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents a satellite or a ground station at the receiving end of the current space link, and the destination IP address is an IP address of the satellite or the ground station at the receiving end of the transmission frame;

In the module M4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the target IP address in the transmission frame is the local satellite IP address subnet, the target IP address is continuously forwarded to the target terminal through the satellite-borne link subnet;

in the module M5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

for time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

For a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.

Compared with the prior art, the invention has the following beneficial effects:

1. the global multi-layer address mapping method of the satellite-borne comprehensive information network adopts a layering method, three types of addresses including a physical address, a logical address and an application address are defined from a protocol system, and the requirements of physical links, network addressing and application matching layer integration high-efficiency data transmission among the satellite, the ground, the space and the internal network can be met;

2. the global multi-layer address mapping method of the satellite-borne integrated information network, which is provided by the invention, integrates the CCSDS protocol and the TCP/IP protocol, defines the generalized mapping relation among the physical address, the logical address and the application address among the longitudinal layers of the respective protocol stacks in the space link sub-network and the satellite-borne link sub-network, and can meet the multi-service mixed transmission requirements of heterogeneous space links and various satellite-borne communication modes;

3. The global multi-layer address mapping method of the satellite-borne integrated information network realizes the generalized mapping relation of the physical address, the logical address and the application address between the transverse layers of the protocol stacks of different sub-networks between the satellite-borne link sub-network and the space link sub-network as well as between the ground link sub-network and the space link sub-network, and constructs the satellite-borne gateway and the ground gateway in a generalized protocol bridging mode.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of a satellite-borne integrated information network protocol model, including a schematic diagram of a satellite-borne link sub-network based on an IP protocol and a schematic diagram of a satellite-borne link sub-network based on a non-IP protocol;

FIG. 2 is a schematic diagram of a mapping relationship between physical addresses and logical addresses of a space link sub-network;

FIG. 3 is a schematic diagram of address translation for a satellite-borne non-IP network and an IP network;

fig. 4 is a simplified network protocol stack diagram of a space link sub-network and a space link sub-network.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.

Example 1:

the invention relates to a global multi-layer address mapping method of a satellite-borne comprehensive information network, wherein the comprehensive information network comprises a space link sub-network and a satellite-borne link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address; the physical address of the space link sub-network is a multiplexing access channel identifier, the logical address is an IP address, and the application address is an application process identifier; the physical address is an MAC address, the logical address is an IP address, the application address is an application process identifier, the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier. The space-borne gateway realizes the mapping of the space link sub-network multiplexing access channel identifiers and the IP addresses, and the main channel identifiers on the space link correspond to the IP sub-network addresses one by one. For an IP protocol-based on-board link sub-network, three different message service qualities, namely time trigger message, rate constraint message and best effort, are represented by the IPv6 protocol header "flow label" field. For a non-IP protocol-based satellite-borne link sub-network, the satellite-borne gateway analyzes an application layer space data packet in a transmission frame, and can carry out intra-satellite routing addressing according to a protocol defined by the sub-network, and can also carry out intra-satellite routing addressing by an application process identifier in the space data packet. In the data link layer, the multiplex access channel identifier is adopted to support the mixed transmission of multiple service data for heterogeneous space links, so that the link utilization rate and the data transmission efficiency are improved, and the protocol conversion overhead of the link layer is reduced. At the network layer, global unified addressing and data packet transmission routing services are implemented based on the IP address. At the application layer, interoperability between different on-board device application program interfaces is achieved based on application process identifiers.

The invention provides a global multi-layer address mapping method for a satellite-borne comprehensive information network, which is shown in fig. 1-4 and comprises the following steps:

step S1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

specifically, in the step S1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

the satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol.

Step S2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

specifically, in the step S2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

the multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

the IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

A transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

Step S3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

specifically, in the step S3:

when the satellite-borne gateway or the ground gateway transmits data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents the current space link receiving end satellite or the ground station, and the destination IP address is the IP address of the transmission frame receiving end satellite or the ground station.

Step S4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

specifically, in the step S4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the destination IP address in the transmission frame is the own satellite IP address subnet, the transmission frame is continuously forwarded to the destination terminal through the satellite-borne link subnet.

Step S5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

Specifically, in the step S5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

for time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

for a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.

Specifically, the comprehensive information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

the physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at the application layer.

Example 2:

example 2 is a preferable example of example 1 to more specifically explain the present invention.

The invention also provides a satellite-borne integrated information network global multi-layer address mapping system, which can be realized by executing the flow steps of the satellite-borne integrated information network global multi-layer address mapping method, namely, a person skilled in the art can understand the satellite-borne integrated information network global multi-layer address mapping method as a preferred implementation mode of the satellite-borne integrated information network global multi-layer address mapping system.

The invention provides a global multi-layer address mapping system of a satellite-borne comprehensive information network, which comprises the following components:

module M1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

in the module M1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

the satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol;

Module M2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

in the module M2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

the multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

the IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

a transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

Module M3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

specifically, in the module M3:

when the satellite-borne gateway or the ground gateway sends data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents a satellite or a ground station at the receiving end of the current space link, and the destination IP address is an IP address of the satellite or the ground station at the receiving end of the transmission frame;

module M4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

in the module M4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the target IP address in the transmission frame is the local satellite IP address subnet, the target IP address is continuously forwarded to the target terminal through the satellite-borne link subnet;

Module M5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

In the module M5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

for time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

for a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.

Specifically, the comprehensive information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

the physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at an application layer;

example 3:

example 3 is a preferable example of example 1 to more specifically explain the present invention.

Aiming at the defects of the prior art, the invention aims to provide a global multi-layer address mapping method for a satellite-borne comprehensive information network. The method provided by the invention has the characteristics of universality, flexibility and expandability, and can meet the requirements of high-efficiency fusion transmission of data between the star and the earth, between the star and in the star.

In this embodiment, the global multi-layer address mapping method of the satellite-borne integrated information network related in the invention, wherein the integrated information network is a network system for realizing space information acquisition, transmission and processing by taking a satellite platform electronic system as a main carrier, and comprises a space link sub-network and a satellite-borne link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address, as shown in fig. 1.

The data communication between the satellite-borne terminal and the ground terminal is realized through the global multi-layer addresses of the satellite-borne gateway and the ground gateway:

1) The physical address represents the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

2) The logic address represents the virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address at the network layer;

3) The application address represents an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at the application layer.

The space link sub-network integrates the CCSDS protocol and the TCP/IP protocol to realize the data exchange transmission between the star and the earth, and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer. The physical layer and the data link layer adopt CCSDS space data link protocol, the network layer and the transmission layer adopt TCP/IP protocol, and the application layer adopts CCSDS space data packet protocol. The physical address is a multiplexing access channel identifier of the unified space data link protocol of the data link layer, and is a global and unique identifier of a transmission frame in a physical channel of a space link sub-network. The logical address is the IP address of the network layer. The application address is an application process identifier of the application layer space packet protocol.

The satellite-borne link sub-network realizes the transmission of the data exchange in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer, an application layer based on an IP protocol, and RS422 serial buses and 1553B master-slave buses based on a non-IP protocol. The topological structure of the satellite-borne link sub-network is relatively fixed, and the requirements on transmission reliability, certainty and real-time are high. The physical address is the MAC address of the data link layer, the logical address is the IP address of the network layer, and the application address is the application process identifier of the application layer space data packet protocol. The physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol.

The space-borne gateway realizes mapping of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and the addressing realizes data exchange, as shown in figure 2. The multiplex access channel identifier is composed of a main channel identifier, a virtual channel identifier and a multiplex access identifier, and the multiplex access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplex access channels on the main channel. Each satellite is assigned a primary channel identifier that uniquely indicates the physical channel address of the satellite on the spatial link. The IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the unique network logical address of the satellite on a space link is represented, and all IP network terminals in the satellite are allocated with a unique host address to form an IP subnet together. The primary channel identifiers are in one-to-one correspondence with the IP subnet addresses over the spatial links.

The transmission frames of the same destination IP address may be transmitted over multiple virtual channels or over multiple multiplexed access channels.

When the space-borne gateway or the ground gateway transmits data to the space link sub-network, a process identifier index table is applied according to the multiplexing access channel identifier and the space data packet, as shown in table 1. And forming 1 or more space data packets into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame according to the multiplexing access channel identifier and the destination IP address index table. The same multiplex access channel identifier transmission frame can be transmitted to a plurality of terminals identified by the IP address, and the terminals identified by the same IP address can also receive the transmission frames represented by the plurality of multiplex access channel identifiers. In the transmission frame, the main channel identifier represents the current space link receiving end satellite or ground station, and the destination IP address is the IP address of the final receiving end satellite or ground station of the transmission frame.

Table 1 multiplex access channel identifier, application procedure identifier, destination IP address index table

After receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the destination IP address in the transmission frame is the own satellite IP address subnet, the transmission frame is continuously forwarded to the destination terminal through the satellite-borne link subnet.

The IP-based star link sub-network is characterized in that the IPv6 protocol packet header 'flow label' field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the star gateway identifies the IPv6 protocol packet header 'flow label', and selects the time trigger message, the rate constraint message or the best effort message to transmit data in the star. For best effort messages, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway. And for the time triggering message and the rate constraint message, the 'flow label' field is used as a key flow identifier and a virtual link of the sub-network of the satellite-borne link.

The on-board link sub-network based on the non-IP protocol, the destination IP address in the transmission frame is the on-board gateway IP address, the on-board gateway analyzes to the application layer space data packet in the transmission frame, and the on-board gateway can carry out on-board routing addressing according to the protocol defined by the sub-network, and can also carry out on-board routing addressing by the application process identifier in the space data packet, as shown in figure 3.

The integration interconnection of the satellite link sub-network non-IP network, the space link sub-network and the satellite link sub-network IP network is realized through the mapping of the space data packet application process identifier of the non-IP protocol and the network layer IP address of the IP network. Fig. 4 shows simplified protocol stacks of the on-board link sub-network and the space link sub-network, and it should be noted that the connection modes of 1553B, RS, CAN, etc. may have their standard network protocol models, but in order to map them to the TCP/IP five-layer model, these networks are pressed on the data link layer in the following figure, and do not represent that they have only the functions defined by the data link layer.

In summary, the invention systematically provides a global multi-layer address mapping method of the satellite-borne comprehensive information network, defines three types of addresses of physical addresses, logical addresses and application addresses, fuses CCSDS protocol and TCP/IP protocol under a spatial link sub-network physical layer, a data link layer, a network layer, a transmission layer and an application layer protocol system, provides a generalized mapping relation among the physical addresses, the logical addresses and the application addresses in the same sub-network and different sub-networks, and lays a foundation for efficient and flexible data transmission under heterogeneous link and multi-type service mixed transmission.

Those skilled in the art will appreciate that the invention provides a system and its individual devices, modules, units, etc. that can be implemented entirely by logic programming of method steps, in addition to being implemented as pure computer readable program code, in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units for realizing various functions included in the system can also be regarded as structures in the hardware component; means, modules, and units for implementing the various functions may also be considered as either software modules for implementing the methods or structures within hardware components.

The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. The global multi-layer address mapping method for the satellite-borne comprehensive information network is characterized by comprising the following steps of:

step S1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

step S2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

step S3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

step S4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

step S5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

2. The method for mapping global multi-layer addresses of a satellite-borne integrated information network according to claim 1, wherein:

the comprehensive information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

the physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at the application layer.

3. The method for global multi-layer address mapping of a satellite-borne integrated information network according to claim 1, wherein in said step S1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

The satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol.

4. The method for global multi-layer address mapping of a satellite-borne integrated information network according to claim 1, wherein in said step S2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

the multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

The IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

a transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

5. The method for global multi-layer address mapping of a satellite-borne integrated information network according to claim 1, wherein in said step S3:

when the satellite-borne gateway or the ground gateway transmits data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents the current space link receiving end satellite or the ground station, and the destination IP address is the IP address of the transmission frame receiving end satellite or the ground station.

6. The method for global multi-layer address mapping of a satellite-borne integrated information network according to claim 1, wherein in said step S4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the destination IP address in the transmission frame is the own satellite IP address subnet, the transmission frame is continuously forwarded to the destination terminal through the satellite-borne link subnet.

7. The method for global multi-layer address mapping of a satellite-borne integrated information network according to claim 1, wherein in said step S5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

For time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

for a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.

8. A global multi-layer address mapping system for a satellite-borne integrated information network, comprising:

module M1: enabling the space link sub-network and the satellite-borne link sub-network to realize data exchange transmission;

module M2: the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

module M3: transmitting data to the space link sub-network, forming the space data packet into a transmission frame uniquely identified by the multiplexing access channel identifier, and adding a corresponding destination IP address for the transmission frame;

module M4: after receiving the transmission frame of the space link sub-network, the satellite-borne gateway carries out inter-satellite link forwarding;

module M5: and classifying the messages according to the message service quality, and selecting different message types by the on-board gateway to transfer data in the star.

9. The on-board integrated information network global multi-layer address mapping system of claim 8, wherein:

the comprehensive information network comprises a space link sub-network and a satellite link sub-network, and the global multi-layer address comprises a physical address, a logical address and an application address;

the physical address is the physical address code of the satellite-borne single machine on the communication link, and the end-to-end communication of the physical link is realized through the physical address in the data link layer;

the logic address is a virtual address code of the satellite-borne single machine in the communication network, and the end-to-end communication of the network link is realized through the logic address in the network layer;

the application address is an application data interface of the satellite-borne single machine in the application program, and end-to-end communication between the application programs is realized through the application address at an application layer;

in the module M1:

the space link sub-network realizes the data exchange transmission between the star and the earth and comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer, wherein the physical address is a multiplexing access channel identifier of a unified space data link protocol of the data link layer, the logical address is an IP address of the network layer, and the application address is an application process identifier of an application layer space data packet protocol;

The satellite-borne link subnetwork realizes the exchange and transmission of the data in the satellite and comprises an Ethernet physical layer, a data link layer, a network layer, a transmission layer and an application layer which are based on an IP protocol, and an RS422 serial bus and a 1553B master-slave bus which are based on a non-IP protocol; the method comprises the steps that a satellite-borne link sub-network based on an IP protocol is adopted, a physical address is a data link layer MAC address, a logical address is an IP address of a network layer, and an application address is an application process identifier of an application layer space data packet protocol; the physical address and the logical address are customized by the adopted protocol, and the application address is an application process identifier of the application layer space data packet protocol;

in the module M2:

the space-borne gateway realizes the mapping and addressing of the space link sub-network physical address multiplexing access channel identifier and the logic IP address, and realizes the data exchange;

the multiplexing access channel identifier consists of a main channel identifier, a virtual channel identifier and a multiplexing access identifier, wherein the multiplexing access channel identifier uniquely represents all transmission frames of different virtual channels and different multiplexing access channels on a main channel, and each satellite is allocated with one main channel identifier and uniquely represents a physical channel address of the satellite on a space link;

The IP address consists of a subnet address and a host address, each satellite is allocated with a subnet address, the network logical address of the satellite on a space link is uniquely represented, and all IP network terminals in the satellite are allocated with a unique host address to jointly form an IP subnet; the main channel identifier corresponds to the IP subnet address one by one on the space link;

a transmission frame of the same destination IP address is transmitted through a plurality of virtual channels or through a plurality of multiplexed access channels.

10. The on-board integrated information network global multi-layer address mapping system of claim 8, wherein:

in the module M3:

when the satellite-borne gateway or the ground gateway sends data to the space link sub-network, 1 or more space data packets are formed into a transmission frame uniquely identified by the multiplexing access channel identifier according to the multiplexing access channel identifier and the space data packet application process identifier index table, and a corresponding destination IP address is added to the transmission frame according to the multiplexing access channel identifier and the destination IP address index table, wherein the main channel identifier represents a satellite or a ground station at the receiving end of the current space link, and the destination IP address is an IP address of the satellite or the ground station at the receiving end of the transmission frame;

In the module M4:

after receiving a transmission frame of a space link sub-network, if a target IP address in the transmission frame is not the local IP address sub-network, the satellite gateway replaces the multiplexing access channel identifier in the transmission frame according to the mapping relation between the multiplexing access channel identifier and the IP address and then continuously forwards the transmission frame through an inter-satellite link; if the target IP address in the transmission frame is the local satellite IP address subnet, the target IP address is continuously forwarded to the target terminal through the satellite-borne link subnet;

in the module M5:

for an IP-based satellite-borne link sub-network, the IPv6 protocol packet header stream label field represents three different message service qualities of time trigger message, rate constraint message and best effort, and the satellite-borne gateway identifies the IPv6 protocol packet header stream label and selects the time trigger message, the rate constraint message or the best effort message to transfer data in the satellite;

for best effort information, the logical addresses and application addresses of the space link sub-network and the satellite link sub-network are kept consistent, and the index of the IP address and the MAC address of the satellite link sub-network is realized by the satellite gateway;

for time triggering information and rate constraint information, a stream label field is used as a satellite-borne link sub-network flow identifier and a virtual link;

For a non-IP protocol-based satellite-borne link sub-network, the destination IP address in the transmission frame is the IP address of a satellite-borne gateway, the satellite-borne gateway analyzes to an application layer space data packet in the transmission frame, and the satellite-borne gateway performs intra-satellite routing addressing according to a protocol defined by the sub-network or performs intra-satellite routing addressing by an application process identifier in the space data packet.