CN109617593B - IBN-based Internet of things satellite system and routing method thereof - Google Patents
IBN-based Internet of things satellite system and routing method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
- H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
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- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
- H04L45/123—Evaluation of link metrics
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/302—Route determination based on requested QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
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- H04L47/29—Flow control; Congestion control using a combination of thresholds
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Abstract
The invention discloses an internet of things satellite system based on IBN and a routing method thereof, wherein the system comprises an application layer, a routing layer and a service layer, wherein the application layer is used for submitting the intention of a user request to the control layer; the control layer is used for receiving and translating the service intention of the application layer into an implementable scheme and transmitting the implementable scheme to the data layer; the data layer is used for forwarding data; the maintenance layer comprises a sensing module and a self-healing module, wherein the sensing module is used for sensing the network state according to the state information and the flow information on the data layer and other network elements and maintaining the smoothness of the network according to the link load and the flow; the self-healing module is used for detecting network abnormal conditions, establishing a firewall and predicting security problems. The method and the system ensure the safe and automatic maintenance in the satellite of the Internet of things, solve the problem of heterogeneity of the equipment of the Internet of things, and effectively reduce the probability of unsmooth network caused by network configuration.
Description
Technical Field
The invention relates to the field of satellite communication, in particular to an internet of things satellite system based on IBN and a routing method thereof.
Background
Satellite communication systems have evolved into an important component of the overall communication system and are also an integral part of people's lives. The traditional ground network covers mountainous areas, sea surfaces and places where ground base stations are difficult to build, and satellite communication can solve the problems at any time and any place. In future networks, people expect that the service expected by people can be obtained at will no matter how they are located, whether in city centers or in remote rural areas, so the satellite network is certainly an extremely important part of the 5G network. However, as services for satellite access become more complex, there is a need for more efficient, safer, and more friendly handling of these services. In conventional satellite networks, where the satellites are only configured by the ground while flying through the site, manual operations are required to be changed or eliminated if necessary, and these commands must be refined and specified, any errors can result in the network becoming inoperable, and these inefficient manual approaches add cost and security risks to the network. Configuration errors in terrestrial networks are also very prone. For example, over 1000 configuration errors are observed in BGP routers. From a device that is misconfigured, it may result in an obstruction of the entire network, compromising the operation of the entire network.
Disclosure of Invention
Aiming at the defects in the prior art, the IBN-based Internet of things satellite system and the routing method thereof solve the problem that the existing satellite communication system is easy to cause unsmooth network due to network configuration.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the internet of things satellite system based on the IBN is characterized by comprising
The application layer is used for submitting the intention requested by the user to the control layer;
the control layer comprises an intention controller, and is used for receiving and translating the service intention of the application layer into an implementable scheme and transmitting the implementable scheme to the data layer;
the data layer is used for forwarding data;
the maintenance layer comprises a sensing module and a self-healing module, wherein the sensing module is used for sensing the network state according to the state information and the flow information on the data layer and other network elements and maintaining the smoothness of the network according to the link load and the flow; the self-healing module is used for detecting network abnormal conditions, establishing a firewall and predicting security problems.
Further, the intention controller is disposed on a geosynchronous orbit satellite.
Further, the data layer comprises an access network and a core network, wherein the access network comprises a satellite network consisting of medium and low orbit satellites and is used for collecting flow data; the core network comprises a switch for data aggregation and routing.
Further, the satellite network comprises N orbital planes, each orbital plane comprises K satellites, and the logic address of the jth satellite on the ith orbital plane is Si，j(ii) a Wherein i belongs to (1,2, …, N), j belongs to (1,2, …, K), N is more than or equal to 2, and K is more than or equal to 3.
The routing method of the Internet of things satellite based on the IBN comprises the following steps:
s1, obtaining the intention requested by the user through the application layer, and sending the intention to the control layer;
s2, translating the acquired intention into an implementable scheme through the control layer and sending the implementable scheme to the data layer;
and S3, forwarding data through the access network and the core network of the data layer to realize the Internet of things.
Further, the specific method of step S2 includes the following steps:
s2-1, obtaining the user ID carried by the intention through the control layer, and dividing the forwarding priority of the intention according to the user ID;
s2-2, adopting a sensing module according to a formula
Obtaining an average load L of a satellite linkavgIn which C iskThe capacity of the kth satellite link is shown, and n is the total number of the satellite links;
s2-3, adopting a sensing module according to a formula
Th＝min{Ck}，k∈[1，n]
Obtaining a load threshold T for a satellite linkh；
S2-4, judging whether the average load of the satellite link is less than or equal to a load threshold value by adopting a sensing module, if so, sending implementable schemes corresponding to all intentions to a data layer and entering a step S3, and if not, entering a step S2-5;
s2-5, adopting the perception module to sequentially send the implementable schemes corresponding to the intentions to the data layer according to the forwarding priority from high to low until the average load of the satellite link is less than or equal to the load threshold, sending the remaining implementable schemes corresponding to the intentions to the data layer together, and entering the step S3.
Further, the specific method of step S3 includes the following steps:
s3-1, obtaining the logical division of the source satellite from the intention through the control layer
And latitude LsLogical address of destination satellite
And latitude Ld；
S3-2, if LSAnd LdIf the angle is larger than 70 degrees, the step S3-3 is carried out; if L isSAnd LdIf the values are less than or equal to 70 degrees, the step S3-5 is carried out; if L isSAnd LdIf and only one is larger than 70 degrees, the step S3-7 is carried out;
s3-3, judging whether the source satellite and the target satellite are in the same orbit plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-4;
s3-4, forwarding the implementable scheme along the vertical direction to a near-polar ground plane satellite, then horizontally forwarding the implementable scheme to a satellite on the same plane as the target satellite, vertically forwarding the implementable scheme to the target satellite, and forwarding the implementable scheme to a target core network through the target satellite to complete internet of things data forwarding;
s3-5, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-6;
s3-6, judging whether the latitude of the source satellite is larger than that of the target satellite, if so, horizontally forwarding the implementable scheme to the orbit plane where the target satellite is located, and then vertically forwarding the implementable scheme to the target satellite to complete the forwarding of the data of the Internet of things; otherwise, the data are vertically transmitted to a near polar ground satellite at the same latitude as the target satellite, then horizontally transmitted to the target satellite, and transmitted to a target core network through the target satellite, so that the data transmission of the Internet of things is completed;
s3-7, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-8;
and S3-8, vertically forwarding the feasible solution to a near-polar ground plane satellite, then horizontally forwarding the feasible solution to an orbit plane where the target satellite is located, then vertically forwarding the feasible solution to the target satellite, and forwarding the feasible solution to a target core network through the target satellite to complete the forwarding of the Internet of things data.
Further, the method also comprises the step of
And S4, detecting the abnormal condition of the network by adopting a self-healing module, establishing a firewall and predicting the security problem.
The invention has the beneficial effects that:
1. through the introduction of an Intention (IBN), the problem of complexity of a traditional Internet of things satellite architecture is solved. Meanwhile, due to the characteristics of intention translation and global state perception in the IBN, the safety automatic maintenance in the Internet of things satellite is guaranteed, the problem of heterogeneity of Internet of things equipment is solved, and the probability of unsmooth network caused by network configuration is effectively reduced.
2. The invention processes the flow type classification according to the user ID, introduces a back-off method, effectively ensures the transmission of various priority data packets and obviously reduces the packet loss rate.
3. Through the shortest route forwarding method, the data packet is represented by the satellite logical address, the logical address is divided into regions, and the characteristics of the satellite network topology effectively reduce the time delay, increase the throughput and determine the shortest route.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
FIG. 2 is a schematic view of a process flow of the present invention;
FIG. 3 is a schematic diagram of a satellite simulation of the data layer of the present invention;
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the IBN-based internet of things satellite system includes
The application layer is used for submitting the intention requested by the user to the control layer;
the control layer comprises an intention controller, and is used for receiving and translating the service intention of the application layer into an implementable scheme and transmitting the implementable scheme to the data layer;
the data layer is used for forwarding data;
the maintenance layer comprises a sensing module and a self-healing module, wherein the sensing module is used for sensing the network state according to the state information and the flow information on the data layer and other network elements and maintaining the smoothness of the network according to the link load and the flow; the self-healing module is used for detecting network abnormal conditions, establishing a firewall and predicting security problems.
Wherein the intent controller is disposed on a geosynchronous orbit satellite. The data layer comprises an access network and a core network, wherein the access network comprises a satellite network consisting of medium and low orbit satellites and is used for collecting flow data; the core network includes switchingAnd the machine is used for carrying out data aggregation and routing. The satellite network comprises N orbital planes, each orbital plane comprises K satellites, and the logic address of the jth satellite on the ith orbital plane is Si，i(ii) a Wherein i ∈ (1,2, …, N), j ∈ (1,2,3, …, K); n is not less than 2, K is not less than 3, N takes a value of 6 preferentially, and K takes a value of 11 preferentially.
As shown in fig. 2, the routing method for IBN-based internet of things satellites includes the following steps:
s1, obtaining the intention requested by the user through the application layer, and sending the intention to the control layer;
s2, translating the acquired intention into an implementable scheme through the control layer and sending the implementable scheme to the data layer;
and S3, forwarding data through the access network and the core network of the data layer to realize the Internet of things.
The specific method of step S2 includes the steps of:
s2-1, obtaining the user ID carried by the intention through the control layer, and dividing the forwarding priority of the intention according to the user ID;
s2-2, adopting a sensing module according to a formula
Obtaining an average load L of a satellite linkavgIn which C iskThe capacity of the kth satellite link is shown, and n is the total number of the satellite links;
s2-3, adopting a sensing module according to a formula
Th＝min{Ck}，k∈[1，n]
Obtaining a load threshold T for a satellite linkh；
S2-4, judging whether the average load of the satellite link is less than or equal to a load threshold value by adopting a sensing module, if so, sending implementable schemes corresponding to all intentions to a data layer and entering a step S3, and if not, entering a step S2-5;
s2-5, adopting the perception module to sequentially send the implementable schemes corresponding to the intentions to the data layer according to the forwarding priority from high to low until the average load of the satellite link is less than or equal to the load threshold, sending the remaining implementable schemes corresponding to the intentions to the data layer together, and entering the step S3.
The specific method of step S3 includes the steps of:
s3-1, obtaining the logical address of the source satellite from the intention through the control layer
And latitude LsLogical address of destination satellite
And latitude Ld；
S3-2, if LSAnd LdIf the angle is larger than 70 degrees, the step S3-3 is carried out; if L isSAnd LdIf the values are less than or equal to 70 degrees, the step S3-5 is carried out; if L isSAnd LdIf and only one is larger than 70 degrees, the step S3-7 is carried out;
s3-3, judging whether the source satellite and the target satellite are in the same orbit plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-4;
s3-4, forwarding the implementable scheme along the vertical direction to a near-polar ground plane satellite, then horizontally forwarding the implementable scheme to a satellite on the same plane as the target satellite, vertically forwarding the implementable scheme to the target satellite, and forwarding the implementable scheme to a target core network through the target satellite to complete internet of things data forwarding;
s3-5, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-6;
s3-6, judging whether the latitude of the source satellite is larger than that of the target satellite, if so, horizontally forwarding the implementable scheme to the orbit plane where the target satellite is located, and then vertically forwarding the implementable scheme to the target satellite to complete the forwarding of the data of the Internet of things; otherwise, the data are vertically transmitted to a near polar ground satellite at the same latitude as the target satellite, then horizontally transmitted to the target satellite, and transmitted to a target core network through the target satellite, so that the data transmission of the Internet of things is completed;
s3-7, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-8;
and S3-8, vertically forwarding the feasible solution to a near-polar ground plane satellite, then horizontally forwarding the feasible solution to an orbit plane where the target satellite is located, then vertically forwarding the feasible solution to the target satellite, and forwarding the feasible solution to a target core network through the target satellite to complete the forwarding of the Internet of things data.
In one embodiment of the present invention, as shown in fig. 3, an area with a latitude exceeding 70 ° is taken as a polar region, and a satellite closest to the polar region in each orbital plane is taken as a near polar plane satellite. The inter-satellite links comprise inter-orbital-plane inter-satellite links and intra-orbital-plane inter-satellite links, and each satellite has four inter-satellite links which are inter-orbital-plane inter-satellite links and intra-orbital-plane inter-satellite links respectively. Because the satellite runs at high speed in the polar region, the antenna system cannot track the position of the satellite in real time, and the inter-orbit link needs to be disconnected and then connected, the satellite in the polar region only has two inter-orbit links in the orbit plane. The satellite network also has a counter-rotating slot that exists between two oppositely-running orbital planes. Interstellar links between two orbital planes next to a counter-rotating slot are not available for link acquisition, so these two orbital planes have only three interstellar links. The length of the interstellar links in the orbital planes is constant, while the length of the interstellar links between the orbital planes is different, with shorter interstellar links at higher latitudes.
In conclusion, the invention solves the problem of complexity of the traditional internet of things satellite architecture through the introduction of the Intention (IBN). Meanwhile, due to the characteristics of intention translation and global state perception in the IBN, the safety automatic maintenance in the Internet of things satellite is guaranteed, the problem of heterogeneity of Internet of things equipment is solved, and the probability of unsmooth network caused by network configuration is effectively reduced.
Claims (6)
1. An IBN-based Internet of things satellite system is characterized by comprising
The application layer is used for submitting the intention requested by the user to the control layer;
the control layer comprises an intention controller, and is used for receiving and translating the service intention of the application layer into an implementable scheme and transmitting the implementable scheme to the data layer;
the data layer is used for forwarding data;
the maintenance layer comprises a sensing module and a self-healing module, wherein the sensing module is used for sensing the network state according to the state information and the flow information on the data layer and other network elements and maintaining the smoothness of the network according to the link load and the flow; the self-healing module is used for detecting network abnormal conditions, establishing a firewall and predicting security problems.
2. The IBN-based internet of things satellite system of claim 1, wherein the intent controller is disposed on a geosynchronous orbit satellite.
3. The IBN-based Internet of things satellite system of claim 1 or 2, wherein the data layer comprises an access network and a core network, wherein the access network comprises a satellite network consisting of medium and low orbit satellites for collecting traffic data; the core network comprises a switch for data aggregation and routing.
4. The IBN-based Internet of things satellite system of claim 3, wherein the satellite network comprises N orbital planes, each orbital plane comprises K satellites, and the logical address of the jth satellite in the ith orbital plane is Si，j(ii) a Wherein i belongs to (1,2,3, …, N), j belongs to (1,2,3, …, K), N is more than or equal to 2, and K is more than or equal to 3.
5. An IBN-based routing method for an Internet of things satellite is characterized by comprising the following steps:
s1, obtaining the intention requested by the user through the application layer, and sending the intention to the control layer;
s2, translating the acquired intention into an implementable scheme through the control layer and sending the implementable scheme to the data layer;
s3, data forwarding is carried out through an access network and a core network of a data layer, and the Internet of things is realized;
s4, detecting the abnormal condition of the network by adopting a self-healing module, establishing a firewall and predicting the security problem;
the specific method of step S2 includes the steps of:
s2-1, obtaining the user ID carried by the intention through the control layer, and dividing the forwarding priority of the intention according to the user ID;
s2-2, adopting a sensing module according to a formula
Obtaining an average load L of a satellite linkavgIn which C iskThe capacity of the kth satellite link is shown, and n is the total number of the satellite links;
s2-3, adopting a sensing module according to a formula
Th＝min{Ck},k∈[1,n]
Obtaining a load threshold T for a satellite linkh；
S2-4, judging whether the average load of the satellite link is less than or equal to a load threshold value by adopting a sensing module, if so, sending implementable schemes corresponding to all intentions to a data layer and entering a step S3, and if not, entering a step S2-5;
s2-5, adopting the perception module to sequentially send the implementable schemes corresponding to the intentions to the data layer according to the forwarding priority from high to low until the average load of the satellite link is less than or equal to the load threshold, sending the remaining implementable schemes corresponding to the intentions to the data layer together, and entering the step S3.
6. The routing method for IBN-based Internet of things satellites as claimed in claim 5, wherein the specific method of the step S3 comprises the following steps:
s3-1, obtaining the logical address of the source satellite from the intention through the control layer
And latitude LsLogical address of destination satellite
And latitude Ld；
S3-2, if LSAnd LdIf the angle is larger than 70 degrees, the step S3-3 is carried out; if L isSAnd LdIf the values are less than or equal to 70 degrees, the step S3-5 is carried out; if L isSAnd LdIf and only one is larger than 70 degrees, the step S3-7 is carried out;
s3-3, judging whether the source satellite and the target satellite are in the same orbit plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-4;
s3-4, forwarding the implementable scheme along the vertical direction to a near-polar ground plane satellite, then horizontally forwarding the implementable scheme to a satellite on the same plane as the target satellite, vertically forwarding the implementable scheme to the target satellite, and forwarding the implementable scheme to a target core network through the target satellite to complete internet of things data forwarding;
s3-5, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-6;
s3-6, judging whether the latitude of the source satellite is larger than that of the target satellite, if so, horizontally forwarding the implementable scheme to the orbit plane where the target satellite is located, and then vertically forwarding the implementable scheme to the target satellite to complete the forwarding of the data of the Internet of things; otherwise, the data are vertically transmitted to a near polar ground satellite at the same latitude as the target satellite, then horizontally transmitted to the target satellite, and transmitted to a target core network through the target satellite, so that the data transmission of the Internet of things is completed;
s3-7, judging whether the source satellite and the target satellite are in the same orbital plane, if so, vertically forwarding towards the target satellite, and forwarding to a target core network through the target satellite to complete the data forwarding of the Internet of things, otherwise, entering the step S3-8;
and S3-8, vertically forwarding the feasible solution to a near-polar ground plane satellite, then horizontally forwarding the feasible solution to an orbit plane where the target satellite is located, then vertically forwarding the feasible solution to the target satellite, and forwarding the feasible solution to a target core network through the target satellite to complete the forwarding of the Internet of things data.
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