CN112104402A - Self-adaptive software-defined heaven-earth integrated network system - Google Patents
Self-adaptive software-defined heaven-earth integrated network system Download PDFInfo
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Abstract
The invention discloses a self-adaptive software-defined heaven-earth integrated network system, which has the technical scheme that the key points of the self-adaptive software-defined heaven-earth integrated network system comprise a ground data center and a space part; the space portion comprises low orbit satellites (LEO), medium orbit satellites (MEO), and high orbit satellites (GEO); software Defined Networking (SDN) is also included; the Software Defined Network (SDN) separates a control plane from a data plane, the method is suitable for a multi-level satellite adopting an LEO-MEO-GEO architecture, and is suitable for more kinds of constellations (satellite systems) compared with the design in the prior art, such as an Iridium constellation, and the universality is better. The invention can automatically detect the type of the service flow after setting the initial model, compared with the prior art, the invention does not need to manually input the QoS parameter, greatly improves the use convenience and has stronger practicability. The system can select a more appropriate scheduling algorithm according to the service type after classifying the service flow, thereby improving the overall resource utilization rate and QoS satisfaction rate of the system and improving the overall performance of the system.
Description
Technical Field
The present invention relates to network systems, and more particularly, to an adaptive software-defined heaven-earth integrated network system.
Background
The space-ground integrated network is an infrastructure which is based on a ground network, extends by taking a space network, covers natural spaces such as space, air, land, ocean and the like and provides information guarantee for activities of various users such as space-based, sea-based, land-based and the like. The ground part comprises traditional ground users, routers and ground stations, and the space part comprises low earth orbit satellites (LEO), medium earth orbit satellites (MEO) and high earth orbit satellites (GEO). The heaven and earth integrated network is a network system which realizes interconnection and intercommunication of the internet, a mobile communication network and a space network by utilizing the internet technology, makes through 3 network service bearing modes and realizes various information coverage by adopting a universal platform to bear.
The Software Defined Network (SDN) is a novel network architecture, and is different from the design of tightly coupling a control plane and a data plane in a conventional network, the SDN architecture separates the control plane and the data plane, and the control plane can perform centralized control on network devices in the data plane through a southbound interface and provide flexible programmability. In the context of a space network, the structure of the SDN means that a satellite node can only complete simple forwarding and hardware configuration functions, and the routing policy and the calculation of specific routing are realized by handing over to a controller node, so that a flexible routing policy, convenient network configuration, better compatibility, and lower deployment and upgrade costs are realized.
At present, chinese patent No. CN106453579A discloses a ground information port architecture of a space-ground integrated information network, and does not consider the design of traffic in the space-based network part, which includes: infrastructure, energy facilities, hardware devices, antenna devices; the method comprises the steps that a network operating system is deployed in a distributed mode on a server and controller related equipment in a ground information port, logic centralized control is achieved, state information of elements consisting of infrastructure, energy facilities, hardware equipment and antenna facilities of the ground information port is obtained in real time, calculation and storage of the ground information port and virtualization of network and antenna resources are achieved, and a virtual resource pool is formed; the comprehensive management and unified scheduling of the ground information port are realized through a network management system, an operation support system and a network safety system. The patent does not consider the design of traffic on the space-based network portion.
Chinese patent No. CN201210145974X discloses a virtual transmission method for air-space-ground integrated network, which includes task virtualization, transmission virtualization and virtual transmission allocation, and includes the steps of, firstly, virtualizing tasks and uniformly describing various tasks by using related parameters; then, virtualizing the detected transmission resources, and uniformly describing the transmission resources by using transmission characteristic parameters; finally, the virtual transmission distribution module completes parameter matching and mapping between the virtualized task and the virtualized transmission, and finds the most suitable transmission mode for different upper layer tasks. But it only involves point-to-point transmission under ideal conditions, does not consider the architecture of the whole network system, needs to manually input parameters for each flow to describe tasks, and at the same time, because of too many parameters, the flow is too large in practical scenes, and does not consider classification processing for different service types.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a self-adaptive software-defined heaven-earth integrated network system, which has the beneficial effects of good universality, convenience in use and strong practicability.
In order to achieve the purpose, the invention provides the following technical scheme: an adaptive software-defined heaven-earth integration network system, characterized by: the system comprises a ground data center and a space part; the space portion comprises low orbit satellites (LEO), medium orbit satellites (MEO), and high orbit satellites (GEO); software Defined Networking (SDN) is also included; the Software Defined Network (SDN) separates the control plane and the data plane.
The invention is further configured to: the number of the low-orbit satellites is at least three; the number of the Medium Orbit Satellites (MEOs) is set to be at least three; the number of the high Earth Orbit Satellites (GEOs) is set to at least three.
The invention is further configured to: the control plane comprises a controller in a high earth orbit satellite (GEO) and is responsible for realizing a protocol, classifying flows, selecting the paths of the flows, updating and issuing the flow tables, controlling the data flow to be forwarded on the paths and providing the data flow to a northbound interface which can be called by an application program.
The invention is further configured to: and the low orbit satellite (LEO) and the medium orbit satellite (MEO) are responsible for forwarding the data packet according to the flow table rule set by the controller.
The invention is further configured to: the ground data center comprises ground users, a router and a ground station.
The invention is further configured to: a method of utilizing the adaptive software-defined space-ground integrated network architecture of claim 5, characterized in that: the method comprises the following steps:
sending a data packet to the low orbit satellite, and judging whether the data packet is a packet of a new data flow according to whether the same destination address and the same source address exist in the existing table entry in the flow table of the forwarding node;
if not, forwarding is carried out according to the existing forwarding rule in the flow table, otherwise, the data flow is recorded, the first N packets belonging to the data flow are sampled (N is a parameter), the key fields in the data flow are directly extracted and sent to the nearest medium orbit satellite (MEO) through the inter-satellite link, and then the key fields are sent to a controller of a high orbit satellite (GEO).
After the classification is finished, the new path selection is carried out on the service flow according to the scheduling algorithm of the service flow and the existing link state.
And updating the updated flow table to a medium orbit satellite (MEO) and a low orbit satellite (LEO) after the path selection is completed. Meanwhile, a low earth orbit satellite (LEO) uploads a link state connected with the controller to a medium earth orbit satellite (MEO) and the controller of the medium earth orbit satellite (MEO) to a high earth orbit satellite (GEO) in a certain period, wherein the link state comprises the utilization rate of link bandwidth, average time delay, packet loss rate and jitter.
In conclusion, the invention has the following beneficial effects:
1. the system is suitable for LEO-MEO-GEO multi-level satellites, is suitable for more kinds of constellations (satellite systems) compared with the design in the prior art, such as Iridium constellations, and has better universality.
2. The system design can automatically detect the types of the service flows after the initial model is set, compared with the prior art, the QoS parameters do not need to be manually input, the use convenience is greatly improved, and the practicability is stronger.
3. The system can select a more appropriate scheduling algorithm according to the service type after classifying the service flow, thereby improving the overall resource utilization rate and QoS satisfaction rate of the system and improving the overall performance of the system.
Drawings
FIG. 1 is a schematic diagram of the architecture of the present invention (three LEOs, MEOs, GEOs, and four ground data centers);
fig. 2 is a schematic diagram of the main service types of the architecture.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment discloses an adaptive software-defined integrated network system, which is an exemplary software-defined network (SDN) in which the number of satellites in the first diagram is three low-earth orbit satellites (LEO), three medium-earth orbit satellites (MEO), three high-earth orbit satellites (GEO), and four ground network centers, as shown in the schematic architecture diagram of fig. 1.
The Low Earth Orbit Satellites (LEOs) are arranged in at least three numbers; the number of the Medium Orbit Satellites (MEOs) is set to be at least three; the number of the high Earth Orbit Satellites (GEOs) is set to at least three.
The control plane comprises a controller in a high earth orbit satellite (GEO) and is responsible for realizing a protocol, classifying flows, selecting the paths of the flows, updating and issuing the flow tables, controlling the data flow to be forwarded on the paths and providing the data flow to a northbound interface which can be called by an application program.
And the low orbit satellite (LEO) and the medium orbit satellite (MEO) are responsible for forwarding the data packet according to the flow table rule set by the controller.
The ground data center comprises ground users, a router and a ground station.
A method of using the adaptive software-defined heaven-earth integral network system of claim 5, the steps of:
the system is mainly applied to transmission from the ground data center to another ground data center when the geographic distance is long, and the service types of the system mainly comprise. As shown in fig. 2, a data packet is sent to the low earth orbit satellite, and whether the data packet is a packet of a new data flow is determined according to whether the table entry in the flow table of the forwarding node has the same destination address and the same source address;
if not, forwarding is carried out according to the existing forwarding rule in the flow table, otherwise, the data flow is recorded, the first N packets belonging to the data flow are sampled (N is a parameter), the key fields in the data flow are directly extracted and sent to the nearest medium orbit satellite (MEO) through the inter-satellite link, and then the key fields are sent to a controller of a high orbit satellite (GEO).
After the classification is finished, the new path selection is carried out on the service flow according to the scheduling algorithm of the service flow and the existing link state.
And updating the updated flow table to a medium orbit satellite (MEO) and a low orbit satellite (LEO) after the path selection is completed. Meanwhile, a low earth orbit satellite (LEO) uploads a link state connected with the controller to a medium earth orbit satellite (MEO) and the controller of the medium earth orbit satellite (MEO) to a high earth orbit satellite (GEO) in a certain period, wherein the link state comprises the utilization rate of link bandwidth, average time delay, packet loss rate and jitter.
The invention has the following beneficial effects: aiming at the characteristics that the satellite network service types in the heaven-earth integrated network are fixed, the flow characteristics are obvious, and the requirements (QoS) of each type of service flow are different, the architecture design for carrying out classified scheduling on the data flows of different services is adopted, so that the guarantee rate and the resource utilization rate of the total QoS are improved, and the congestion and the service failure are reduced.
1. The system is suitable for LEO-MEO-GEO multi-level satellites, is suitable for more kinds of constellations (satellite systems) compared with the design in the prior art, such as Iridium constellations, and has better universality.
2. The system design can automatically detect the types of the service flows after the initial model is set, compared with the prior art, the QoS parameters do not need to be manually input, the use convenience is greatly improved, and the practicability is stronger.
3. The system can select a more appropriate scheduling algorithm according to the service type after classifying the service flow, thereby improving the overall resource utilization rate and QoS satisfaction rate of the system and improving the overall performance of the system.
The alternative scheme of the invention is mainly a SERvICE architecture, and compared with the scheme, a flow classification mechanism is not adopted, so that part of SERvICE flows with large bandwidth consumption occupy all the bandwidth, other services with small bandwidth consumption but sensitive time delay are blocked, the resource utilization rate is low, and the SERvICE requirement cannot be ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (6)
1. An adaptive software-defined heaven-earth integration network system, characterized by: the system comprises a ground data center and a space part; the space portion comprises low orbit satellites (LEO), medium orbit satellites (MEO), and high orbit satellites (GEO); software Defined Networking (SDN) is also included; the Software Defined Network (SDN) separates the control plane and the data plane.
2. The adaptive software-defined heaven-earth integrated network system according to claim 1, wherein: the number of the low-orbit satellites is at least three; the number of the Medium Orbit Satellites (MEOs) is set to be at least three; the number of the high Earth Orbit Satellites (GEOs) is set to at least three.
3. The adaptive software-defined heaven-earth integrated network system according to claim 2, wherein: the control plane comprises a controller in a high earth orbit satellite (GEO) and is responsible for realizing a protocol, classifying flows, selecting the paths of the flows, updating and issuing the flow tables, controlling the data flow to be forwarded on the paths and providing the data flow to a northbound interface which can be called by an application program.
4. The adaptive software-defined heaven-earth integrated network system according to claim 3, wherein: and the low orbit satellite (LEO) and the medium orbit satellite (MEO) are responsible for forwarding the data packet according to the flow table rule set by the controller.
5. The adaptive software-defined heaven-earth integrated network system according to claim 4, wherein: the ground data center comprises ground users, a router and a ground station.
6. A method of using the adaptive software-defined heaven-earth integral network system of claim 5, wherein: the method comprises the following steps:
1. sending a data packet to the low orbit satellite, and judging whether the data packet is a packet of a new data flow according to whether the same destination address and the same source address exist in the existing table entry in the flow table of the forwarding node;
2. if not, forwarding according to the existing forwarding rule in the flow table, otherwise, recording the data flow, sampling the first N packets belonging to the data flow (N is a parameter), directly extracting key fields in the data flow, sending the key fields to the nearest medium orbit satellite (MEO) through an inter-satellite link, and sending the key fields to a controller of a high orbit satellite (GEO);
3. after the classification is finished, carrying out new path selection on the service flow according to the scheduling algorithm of the service flow and the existing link state;
4. updating the updated flow table to a medium orbit satellite (MEO) and a low orbit satellite (LEO) after the path selection is finished; meanwhile, a low earth orbit satellite (LEO) uploads a link state connected with the controller to a medium earth orbit satellite (MEO) and the controller of the medium earth orbit satellite (MEO) to a high earth orbit satellite (GEO) in a certain period, wherein the link state comprises the utilization rate of link bandwidth, average time delay, packet loss rate and jitter.
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Cited By (3)
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| CN113271142A (en) * | 2021-06-03 | 2021-08-17 | 中国科学院软件研究所 | Operation control system and operation control method of software defined satellite |
| CN114268575A (en) * | 2021-12-23 | 2022-04-01 | 苏州全时空信息技术有限公司 | Self-adaptive three-dimensional transmission method and system in heaven-earth integrated information network |
| CN114554506A (en) * | 2022-02-23 | 2022-05-27 | 北京电子科技学院 | Multilayer satellite network edge intelligent safety decision method and system |
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Application publication date: 20201218 |