CN105743717A - Space and ground integrated spatial information network system based on SDN technique and communication method of the system - Google Patents
Space and ground integrated spatial information network system based on SDN technique and communication method of the system Download PDFInfo
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- CN105743717A CN105743717A CN201610289222.9A CN201610289222A CN105743717A CN 105743717 A CN105743717 A CN 105743717A CN 201610289222 A CN201610289222 A CN 201610289222A CN 105743717 A CN105743717 A CN 105743717A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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Abstract
The invention discloses a space and ground integrated spatial information network system based on an SDN technique and a communication method of the system. The system and the method are mainly used for improving utilization rate and network service quality of satellite communication network resources. The system comprises satellite ground stations (STAs), a ground data center (DC), geosynchronous orbit satellites (GEOs), low orbit satellites (LEOs) and wireless communication links among the STAs, the DC, the GEOs and the LEOs. Low layer SDN controllers (D-controllers) are deployed at the ground stations and the GEOs and SDN switches are deployed on the LEOs, thus forming a distributed spatial information network based on SDNs. The whole earth surface is fully covered by multiple LEOs in multiple orbits. In the coverage of the GEOs, overall control is carried out through the controllers on the GEOs, thus forming the spatial information network covering the whole world; moreover, the GEOs access a ground network through the satellite ground stations STAs. The D-controllers are centrally controlled by utilizing the SDN super controllers (S-controllers) deployed at a ground data center; and a satellite network and a ground fixed network are fused.
Description
Technical field
The invention belongs to satellite network technical field, particularly to one multi-level Satellite Networking technology and satellite
The management of Internet resources and dispatching method.
Background technology
Spatial information net is for national defence, remote sensing, and the field such as navigation is significant, can with cross-region,
Cross operator realizes uninterrupted communication in global range.Incorporate refers to Space-based Network is incorporated ground
Apply and provide service for terrestrial user, take with the types of applications having merged satellite communication including centered by satellite
Business.Realizing transoceanic communication from initial satellite, to digital multimedia broadcast (dmb) via satellite, or all kinds of earth observation is defended
Star system, Incorporate has become as the basic demand of the types of applications system relevant to satellite.
Incorporate information network can not only ensure that the ground infrastructure such as remote meagrely-populated, geographical is weaker
Area is used for accessing the Internet, and can support survey of deep space, earth observation, space flight measurement and control, satellite navigation,
The multiple special applications such as prominent, smart city at air transportation, oceangoing voyage, emergency management and rescue, stability maintenance.
SDN has control and forwards separation, device resource virtualization, common hardware and software programmable three big
Characteristic, not only whole network is the most unitized, standardization, and allow net in vertical direction
Network Opening, standardization, able to programme, allow Internet resources be easier to, more effectively to be used.
By multi-level SDN Technology application in Incorporate Information Network, use new net
Network framework improves Incorporate information network performance, reducings the construction costs and maintenance difficulties, reaches significantly to change
The purpose of kind network resource utilization.
Summary of the invention
In order to solve spatial information net overall network topology manage, the flexible dispatching of inter-satellite link resource and point
Joining, the present invention proposes a kind of Incorporate Information Network system based on SDN technology and communication party
Method.
The system of the present invention be the technical scheme is that a kind of Incorporate space based on SDN technology
Information network system, it is characterised in that: include data Layer, key-course and application layer；
Described data Layer is by disposing SDN switch group on many low-orbit satellite LEO in multiple orbital planes
Become, utilize the wireless communication link between LEO to carry out networking；
Described key-course is by the supercentral super controller structure of geo-synchronous orbit satellite GEO and ground data
Become；
Described application layer is transported by the super controller in the minds of in geo-synchronous orbit satellite GEO and ground data
The application program of row is constituted, and whole satellite communication network based on SDN is managed neatly and controlled.
As preferably, many low-orbit satellite LEO in described data Layer according to certain tilt profiles multiple
In orbital plane, its flight path realizes being completely covered including the two poles of the earth to the whole earth.
As preferably, described key-course is provided with the geo-synchronous orbit satellite GEO in overhead, three equator,
All it is deployed with vertical-type on three geo-synchronous orbit satellite GEO and controls the low layer SDN controller in framework
(D-Controller), every geo-synchronous orbit satellite GEO is interior and permissible with oneself coverage of certain moment
The low-orbit satellite LEO setting up communication connection forms SDN；Three geo-synchronous orbit satellite GEO
Carry out wireless connections with the earth ground stations STA in respective coverage, accessed by earth ground stations STA
Gateway accessing ground network, utilizes landline network insertion data center；Top layer it is deployed with in data center
Super SDN controller (S-Controller), utilizes super controller to manage geo-synchronous orbit satellite GEO
In lower-level controllers, obtain in real time overall network topology and network state information, manage efficiently and adjust
Degree.
The method of the present invention be the technical scheme is that a kind of Incorporate space based on SDN technology
The communication means of information network system, it is characterised in that: comprise the following steps:
Step 1: information source A sends packet, the low-orbit satellite LEO of access communications optimal quality；
Step 2: low-orbit satellite LEO is according to the forward table stored in SDN switch and this packet
Can whether destination address mate to judge directly be forwarded by low-orbit satellite LEO；
The most then stay of two nights B receives purpose signal, and this flow process terminates；
If it is not, then perform following step 3；
Step 3: transfer low layer SDN controller (D-Controller) belonging to this low-orbit satellite LEO to；
Step 4: the network state information that low layer SDN controller is grasped according to it, the forwarding stored according to it
Table judges another low-orbit satellite LEO that can the destination address of this packet be transmitted in its span of control；
The most then low layer SDN controller is transmitted to target low-orbit satellite LEO, stay of two nights B and receives purpose letter
Number, this flow process terminates；
If it is not, then perform following step 5；
Step 5: low layer SDN controller delivers a packet to the super controller of ground SDN；
Step 6: ground super SDN controller judges the mesh of packet according to its global network view grasped
Address whether can forward low-orbit satellite LEO by different low layers SDN controller (D-Controller)
Send to；
The most then issue target low layer SDN controller, then perform following step 7；
If it is not, then redirected by packet or abandon, this flow process terminates；
Step 7: issue low layer SDN controller, is issued target low-orbit satellite by low layer SDN controller
LEO, stay of two nights B receive purpose signal, and this flow process terminates.
The innovative point of the present invention is:
(1) utilize the network architecture of SDN, existing satellite network is divided into three abstract aspects, datum plane
(SDN switch), control plane (SDN controller), application plane (SDN application program).
(2) by LEO (low-orbit satellite), GEO (geo-synchronous orbit satellite), the STA (earth
Earth station) upper deployment controller or switch realize the Global coverage of satellite network and earth station for whole
The overall situation control of network.
(3) feature of SDN technology flexible programmable is utilized, it is achieved the sweetly disposition of resource on star.Such as,
According to the requirement of real-time of different business, bandwidth requirement, calculate and store the requirements such as resource, utilizing SDN to control
The overall control ability of device processed is the response priority that different business distribution is different, calculates and stores resource etc..
(4) global view utilizing SDN carries out network topology management.Such as, the topological structure of satellite network
Pace of change is very fast, it is possible to use the link circuit condition of network is supervised by the global view ability of SDN controller
Control, obtains up-to-date topology status at any time.
Accompanying drawing explanation
The system architecture figure of Fig. 1: the embodiment of the present invention；
The network topological diagram of Fig. 2: the embodiment of the present invention；
The SDN hierarchical diagram of Fig. 3: the embodiment of the present invention；
The system deployment figure of Fig. 4: the embodiment of the present invention；
The communication flow diagram of Fig. 5: the embodiment of the present invention.
Detailed description of the invention
Understand and implement the present invention for the ease of those of ordinary skill in the art, below in conjunction with the accompanying drawings and embodiment pair
The present invention is described in further detail, it will be appreciated that enforcement example described herein is merely to illustrate reconciliation
Release the present invention, be not intended to limit the present invention.
Ask for an interview Fig. 1, Fig. 2 and Fig. 3, a kind of based on SDN technology the Incorporate space that the present invention provides
Information network system, according to the hierarchical design thought of SDN, by the fixing network of satellite communication network Yu ground
Carried out integration in logic, by its abstract be three aspects, data Layer, key-course and application layer.Multiple rails
On multiple LEO on face, road dispose SDN switch composition data Layer, geo-synchronous orbit satellite GEO and
The supercentral super controller of ground data constitutes key-course, on the super controller in GEO and data center
The application program run constitutes application layer.
(1) data Layer: according to being distributed many LEO, its flight path pair in multiple orbital planes at certain inclination angle
The whole earth realizes being completely covered including the two poles of the earth.LEO disposes SDN switch, utilizes LEO
Between wireless communication link carry out networking.
(2) key-course: the GEO satellite in overhead, three equator can realize all districts in addition to terrestrial pole
The all standing in territory.Vertical-type controls the lower-level controllers in framework be deployed on three GEO, every GEO
With in oneself coverage of certain moment and can set up communication connection LEO form SDN.Due to difference
The relative position of moment LEO from GEO is different, so this network structure belongs to has the dynamic of certain regularity
Structure.Meanwhile, three GEO carry out wireless connections with the earth station STA in respective coverage, pass through
STA accesses gateway accessing ground network, utilizes landline network insertion data center, simultaneously in data center
The super controller of upper deployment top layer, utilize super controller to the lower-level controllers managing in GEO, in real time
Obtain overall network topology and network state information, manage efficiently and dispatch.
(3) application layer: disposing on the controller of three GEO and the super controller at ground data center should
Use layer software, whole satellite communication network based on SDN is managed neatly and controls.
Every aspect is divided by the present embodiment according to the structure of Fig. 3.Concrete portion is carried out according to the mode of Fig. 4
Administration.Wherein A1, A2, A3 are three LEO in A orbital plane, and B1, B2, B3 are in B orbital plane
Three LEO, C1, C2, C3 are three LEO on C rail face, form data at these nine LEO
Layer, disposes SDN switch thereon.D-Con1, D-Con2, D-Con3 are three GEO, this enforcement
Example disposes SDN bottom controller, STA1, STA2, STA3 above, is three ground satellite stations, makees
Satellite network and ground network is connected for access network.They fix network by ground each other and are connected to ground
DC (data center), disposes super controller (S-Con) in DC.By these four controller composition control layers.
The web application APP being arranged on key-course constitutes application layer.
Communication process is as a example by Fig. 5.First, user terminal is set up with the LEO of communication quality optimum and is connected,
Initiating session, this LEO judges can directly forward message according to the destination address of call request, if it is possible to
Directly forwarding is then transmitted directly to receiving terminal, completes this communication, if can not directly forward, and can be by these data
Bag is transmitted to the GEO (D-Con) belonging to this LEO, the network information that now D-Con can grasp according to it
Judge destination address whether in remaining two GEO (D-Con) institute span of control, if mesh can be found
Another GEO belonging to address, then forward, another GEO (D-Con) be transmitted to destination address
The LEO in overhead, completes communication.If can not find the GEO belonging to destination address, then this packet is passed through
STA issues ground S-Con, by super controller carry out judging this destination address whether up to, if can not
Reach, select to redirect or abandon this packet, if up to, it is sent to corresponding GEO by STA
(D-Con) LEO relaying to correspondence completes communication.
It should be appreciated that the part that this specification does not elaborates belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered
Restriction to scope of patent protection of the present invention, those of ordinary skill in the art is under the enlightenment of the present invention, not
Depart under the ambit that the claims in the present invention are protected, it is also possible to make replacement or deformation, each fall within this
Within bright protection domain, the scope that is claimed of the present invention should be as the criterion with claims.
Claims (4)
1. an Incorporate Information Network system based on SDN technology, it is characterised in that: include
Data Layer, key-course and application layer；
Described data Layer is by disposing SDN switch group on many low-orbit satellite LEO in multiple orbital planes
Become, utilize the wireless communication link between LEO to carry out networking；
Described key-course is by the supercentral super controller structure of geo-synchronous orbit satellite GEO and ground data
Become；
Described application layer is transported by the super controller in the minds of in geo-synchronous orbit satellite GEO and ground data
The application program of row is constituted, and whole satellite communication network based on SDN is managed neatly and controlled.
Incorporate Information Network system based on SDN technology the most according to claim 1,
It is characterized in that: many low-orbit satellite LEO in described data Layer according to certain tilt profiles at multiple rails
On face, road, its flight path realizes being completely covered including the two poles of the earth to the whole earth.
Incorporate Information Network system based on SDN technology the most according to claim 1,
It is characterized in that: described key-course is provided with the geo-synchronous orbit satellite GEO in overhead, three equator, three
All it is deployed with vertical-type on geo-synchronous orbit satellite GEO and controls the low layer SDN controller in framework, often
In geo-synchronous orbit satellite GEO and oneself coverage of certain moment and the low rail of communication connection can be set up
Road satellite LEO forms SDN；In three geo-synchronous orbit satellite GEO and respective coverage
Earth ground stations STA carries out wireless connections, accesses gateway accessing ground network by earth ground stations STA,
Utilize landline network insertion data center；The super SDN controller of top layer it is deployed with in data center,
Utilize super controller to manage the lower-level controllers in geo-synchronous orbit satellite GEO, obtain the overall situation in real time
Network topology and network state information, manage efficiently and dispatch.
4. a communication means for Incorporate Information Network system based on SDN technology, its feature
It is: comprise the following steps:
Step 1: information source A sends packet, the low-orbit satellite LEO of access communications optimal quality；
Step 2: low-orbit satellite LEO is according to the forward table stored in SDN switch and this packet
Can whether destination address mate to judge directly be forwarded by low-orbit satellite LEO；
The most then stay of two nights B receives purpose signal, and this flow process terminates；
If it is not, then perform following step 3；
Step 3: transfer the low layer SDN controller belonging to this low-orbit satellite LEO to；
Step 4: the network state information that low layer SDN controller is grasped according to it, the forwarding stored according to it
Table judges another low-orbit satellite LEO that can the destination address of this packet be transmitted in its span of control；
The most then low layer SDN controller is transmitted to target low-orbit satellite LEO, stay of two nights B and receives purpose letter
Number, this flow process terminates；
If it is not, then perform following step 5；
Step 5: low layer SDN controller delivers a packet to the super controller of ground SDN；
Step 6: ground super SDN controller judges the mesh of packet according to its global network view grasped
Address whether low-orbit satellite LEO can be forwarded to send to by different low layer SDN controllers；
The most then issue target low layer SDN controller, then perform following step 7；
If it is not, then redirected by packet or abandon, this flow process terminates；
Step 7: issue low layer SDN controller, is issued target low-orbit satellite by low layer SDN controller
LEO, stay of two nights B receive purpose signal, and this flow process terminates.
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| CN113691544B (en) * | 2021-08-26 | 2022-08-02 | 中国联合网络通信集团有限公司 | Network scheduling method |
| CN114124192A (en) * | 2021-10-25 | 2022-03-01 | 北京邮电大学 | Coverage extension system and method based on satellite network |
| CN114124192B (en) * | 2021-10-25 | 2022-09-27 | 北京邮电大学 | Coverage extension system and method based on satellite network |
| WO2023108597A1 (en) * | 2021-12-17 | 2023-06-22 | Oppo广东移动通信有限公司 | Communication method and communication apparatus |
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