CN110519146A - Service protecting method and controller based on air-ground integrated annular link structure - Google Patents
Service protecting method and controller based on air-ground integrated annular link structure Download PDFInfo
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- CN110519146A CN110519146A CN201910784720.4A CN201910784720A CN110519146A CN 110519146 A CN110519146 A CN 110519146A CN 201910784720 A CN201910784720 A CN 201910784720A CN 110519146 A CN110519146 A CN 110519146A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/035—Arrangements for fault recovery using loopbacks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/275—Ring-type networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
Abstract
The invention discloses a kind of service protecting methods and controller based on air-ground integrated annular link structure; the described method includes: being head and the tail optical node S, D of optical fiber link to be protected; accessible Liang Ge earth station S ', D ' are selected respectively, and then select two accessible satellite LS、LD；Determine spatial light link road by P (LS→LD) after, construct S → S ' → LS→P(LS→LD)→LDThe annular link structure of → D ' → D → S；In optical fiber link failure or D → D ' → L of S → DD→P(LD→LS)→LSWhen the upper any one link of → S ' → S surprisingly fails, service protection is carried out using the ring light link structure.Using the present invention with can making between local face optical fiber link, star optical link or star optical link failure when be able to carry out service loop operation so that service fast protection.
Description
Technical field
The present invention relates to air-ground integrated optical-fiber network technical fields, particularly relate to a kind of based on air-ground integrated endless chain
The service protecting method and controller of line structure.
Background technique
The natural disaster and artificial destruction that frequently occur have seriously affected the normal operation of optical-fiber network, and there is an urgent need to design tool
There is the survivability scheme of high capability to resist destruction.However existing Survivability technology relies primarily on optical-fiber network itself and realizes under disaster scene
The recovery of business, network survivability capability improving are limited.With the development of satellite communication, terrestrial optical network is realized using satellite network
The promotion of capability to resist destruction becomes a kind of new thinking.Since satellite is located at 400 kilometers or more of area of space, it is generally free from ground
The influence of all kinds of natural disasters, therefore satellite network and terrestrial optical network have disaster independence, carry out ground using satellite network
What the protection of face optical network service restored to can be realized truly anti-ruins.But the satellite network based on radio communication and
Terrestrial optical network uses different transmission system and agreement, and transmission rate, time delay, transport protocol, physical damnification etc. are entirely different,
If the protection cooperateed with restores, need to carry out complicated signal, code speed, protocol conversion, it is complicated for operation, realize efficiency
It is low.Space optical-fiber network can directly carry out being switched fast for business, grasp due to using identical transmission system with terrestrial optical network
Make simply, therefore is designed to inevitable choice using anti-ruin of the collaboration that space optical-fiber network carries out terrestrial optical network.With spatial light
Network and terrestrial optical network constantly merge, and air-ground integrated optical-fiber network will become the high-speed high capacity transmission net of the following core.
For the air-ground integrated optical-fiber network that space optical-fiber network and terrestrial optical network form, there is presently no effective existence
Property scheme.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of business guarantor based on air-ground integrated annular link structure
Maintaining method and controller, make expediently between face optical fiber link, star optical link or star optical link failure when be able to carry out business
Loops back is able to solve service protection problem of the ground optical fiber link under disaster scene, while being also able to achieve light chain between star
Road and star optical link failure when business quick protection.
A kind of service protecting method based on air-ground integrated annular link structure is provided based on the above-mentioned purpose present invention,
Include:
For head and the tail optical node S, D of optical fiber link to be protected, accessible Liang Ge earth station S ', D ' are selected respectively, is
Described two earth station S ', D ' select two accessible satellite L respectivelyS、LD；
It determines from satellite LSTo LDSpatial light link road by P (LS→LD)；
To S, D, S ', D ' and P (LS→LD) pass through each satellite configured, formed S → S ' → LS→P(LS→LD)
→LDThe annular link structure of → D ' → D → S；
In optical fiber link failure or D → D ' → L of S → DD→P(LD→LS)→LSThe upper any one link of → S ' → S
When unexpected failure, service protection is carried out using the ring light link structure.
Wherein, described head and the tail optical node S, D for optical fiber link to be protected, selects accessible Liang Ge earth station respectively
S ', D ', specifically include:
For optical node S, D, two ground for selecting the distance not in the same shared disaster risk region nearest respectively
Stand S ', D '.
Wherein, described to select two accessible satellite L respectively for described two earth station S ', D 'S、LD, it specifically includes:
For each earth station of selection, in the earth station, there are the feelings of multiple accessible Low Earth Orbit LEO satellites
Under condition, will wherein have the LEO satellite of current maximum access duration as the satellite selected for the earth station.
Wherein, the determination is from satellite LSTo LDSpatial light link road by P (LS→LD), it specifically includes:
By satellite LS、LDIt is added in satellite set V；
For each satellite in V, the LEO satellite, MEO satellite and GEO satellite that are accessible to the satellite are added to V
In, until there is no satellite that can be added in set V；And
Laser link between set V Satellite is added in laser link set E, space segment real-time network is constituted and opens up
Flutter G (V, E)；
After the laser link that idle frequency spectrum resource is less than preset bandwidth value is deleted from G (V, E), shortest path is utilized
Algorithm calculates one from satellite LSTo LDSpatial light link road by P (LS→LD)。
Further, the method also includes:
Before ring light link structure failure, selecting two respectively again for described two earth station S ', D ' can be connect
The satellite L enteredS′、LD′；
It determines from satellite LS' to LD' spatial light link road by P (LS′→LD′)；
To S, D, S ', D ' and P (LS′→LD') pass through each satellite configured, formed S → S ' → LS′→P(LS′
→LD′)→LD' → D ' → D → S new annular link structure.
The present invention also provides a kind of controllers, comprising:
Earth station's selecting module, for head and the tail optical node S, D for optical fiber link to be protected, selection be can access respectively
Liang Ge earth station S ', D '；
The select of satellite module, for selecting two accessible satellite L respectively for described two earth station S ', D 'S、LD；
Spatial light link road is by determining module, for determining from satellite LSTo LDSpatial light link road by P (LS→LD)；
Annular link structure configuration module, for S, D, S ', D ' and P (LS→LD) pass through each satellite matched
It sets, forms S → S ' → LS→P(LS→LD)→LDThe annular link structure of → D ' → D → S；And it will be under the annular link structure
The each node being sent in the annular link structure, so that in optical fiber link failure or D → D ' → L of S → DD→P(LD→
LS)→LSWhen the upper any one link of → S ' → S surprisingly fails, node involved in faulty link or unexpected failed link can benefit
Service protection is carried out with the ring light link structure.
Further, the controller further include:
Annular link structure update module, for preceding to the select of satellite module in current annular link structure failure
Send the select of satellite notice；And
The select of satellite module is also used to after receiving the select of satellite notice, is again described two earth stations
S ', D ' select two accessible satellite L respectivelyS′、LD', and routing is sent really by determining module to the spatial light link road
Fixed notice；And
The spatial light link road is also used to after receiving the routing and determining notice by determining module, is determined from satellite
LS' to LD' spatial light link road by P (LS′→LD′)；And match to the annular link structure configuration module transmission link structure
Set notice；And
It is described annular link structure configuration module be also used to after receiving the link structure configuration notification, to S, D,
S ', D ' and P (LS′→LD') pass through each satellite configured, formed S → S ' → LS′→P(LS′→LD′)→LD′→D’
The new annular link structure of → D → S；And the new annular link structure is issued to every in the new annular link structure
A node, so that in optical fiber link failure or D → D ' → L of S → DD′→P(LD′→LS′)→LS' → S ' → S is upper any one
When link surprisingly fails, node involved in faulty link or unexpected failed link can using the ring light link structure into
Row service protection.
Technical solution of the present invention provides a kind of service protecting method based on air-ground integrated annular link structure, is
Head and the tail optical node S, D of optical fiber link to be protected select earth station S ', D ' and accessible satellite LS、LD, determine from satellite
LSTo LDSpatial light link road by P (LS→LD) after, S → S ' → L of space segment and ground segment is covered in buildingS→P(LS→LD)
→LDThe annular link structure of → D ' → D → S；When ground optical fiber link break down or star between, satellite-ground link occur it is unexpected
Directly working service is switched in annular link structure when failure, industry of the ground optical fiber link under disaster scene can be protected
Business protection, with being also able to achieve optical link and star between star when optical link failure business quick protection, so as to realize real meaning
Anti- in justice is ruined；
Moreover, because between star in annular link structure of the invention, the light connects between star ground, mainly pass through laser
Signal carries out the transmission of business datum, therefore, optical signal in the optical fiber link on ground without carry out complicated signal, agreement,
The conversion such as rate, so that it may quickly carry out service protection using the light connects between the star in annular link structure, between star ground.
Detailed description of the invention
Fig. 1 is a kind of service protecting method based on air-ground integrated annular link structure provided in an embodiment of the present invention
Flow chart；
Fig. 2 is the air-ground integrated optical-fiber network that the optical-fiber network provided in an embodiment of the present invention by space segment, ground segment forms
Configuration diagram；
It is the accessible earth station's schematic diagram of optical node selection that Fig. 3, which is provided in an embodiment of the present invention,；
It is that earth station selects two accessible satellite schematic diagrames that Fig. 4, which is provided in an embodiment of the present invention,；
Fig. 5 is a kind of determination provided in an embodiment of the present invention from satellite LSTo LDSpatial light link road by method flow
Figure；
Fig. 6 is a kind of schematic diagram of space segment Network Topology for Real-Time G (V, E) provided in an embodiment of the present invention；
Fig. 7 is the configuring condition schematic diagram of annular link structure interior joint provided in an embodiment of the present invention；
Fig. 8 is a kind of annular link structure schematic diagram of building provided in an embodiment of the present invention；
Loopback connection schematic diagram when Fig. 9 is optical fiber link failure provided in an embodiment of the present invention, inside optical node；
Figure 10 be it is provided in an embodiment of the present invention it is a kind of be set in controller based on air-ground integrated annular link
The internal structure block diagram of the service protection device of structure.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or there may also be intermediary elements.In addition, this
In " connection " or " coupling " that uses may include being wirelessly connected or wireless coupling.Wording "and/or" used herein includes one
A or more associated whole for listing item or any cell and all combination.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
Service protecting method proposed by the present invention based on air-ground integrated annular link structure is one kind towards vacant lot
The ring protection method of integrated optical network is mainly set up using the optical-fiber network of the optical-fiber network of space segment and ground segment comprising ground
The data of ground optical fiber link, are switched in free space optical links by the ring shaped guard structures of face section and space segment under disaster scene
It is transmitted, it is easy to operate without the conversion such as complicated signal, agreement, rate.
The technical solution for embodiment that the invention will now be described in detail with reference to the accompanying drawings.
A kind of service protecting method based on air-ground integrated annular link structure provided in an embodiment of the present invention, process
As shown in Figure 1, including the following steps:
Step S101: for head and the tail optical node S, D of optical fiber link to be protected, accessible Liang Ge earth station is selected respectively
S’、D’。
Specifically, optical fiber link to be protected can be selected according to the anti-importance for ruining demand and optical fiber.Due to hair
Satellite is penetrated, builds earth station, building space optical-fiber network needs to consume a large amount of man power and material, relative to terrestrial optical network
Speech, the bandwidth higher cost of space optical-fiber network, it is therefore desirable to need to be to be protected according to the anti-importance selection for ruining demand and optical fiber
Ground optical fiber link.Generally select that disaster takes place frequently and the higher optical fiber link of communication importance is protected, such as transoceanic seabed
Optical cable.Since transoceanic submarine optical fiber cable often carries the transmitting of the information between country variant, the grade of service is high, and optical cable importance is big.
Meanwhile all kinds of failures easily occur for transoceanic submarine optical fiber cable distance, complex geographical environment.
Technical solution of the present invention both can provide protection for all business in optical fiber link to be protected, can also only be
Part important service provides protection.It is assumed that optical fiber link to be protected is S-D, wherein the bandwidth of business to be protected is B
Bit/s, transmission direction are the optical node that S → D, S and D are respectively optical fiber link both ends to be protected.In fact, network manager can
With the bandwidth of business to be protected determines according to actual conditions.
In this step, it can be head and the tail optical node S, D of optical fiber link to be protected, select respectively not same shared
Distance in disaster risk region nearest Liang Ge earth station S ', D '.It specifically, can be according to the position of optical fiber link to be protected
It sets, the optical node for the both ends of optical fiber link to be protected selects suitable earth station as the space segment of ring shaped guard structures
The transit point of the optical-fiber network of optical-fiber network and ground segment as shown in Fig. 2, air-ground integrated optical-fiber network by space segment optical-fiber network (or
Space optical-fiber network) and ground segment optical-fiber network (or terrestrial optical network) composition, and space optical-fiber network by earth station and ground
Face optical-fiber network is interconnected.Space optical-fiber network is by Low Earth Orbit (LEO) satellite, Medium-Earth Orbit (MEO) satellite, high earth rail
Optical link forms between road (GEO) satellite and star.Space optical-fiber network and terrestrial optical network carry out information transmission and need to pass through ground
Station is transferred, and each earth station is responsible for being interconnected with visible LEO satellite.The selection of earth station is one extremely complex
Problem needs to consider the position of earth station, the factors such as local weather.Such as it is contemplated that two kinds of factors, one is to be protected
Optical fiber link head and the tail optical node and earth station position, another be earth station with optical fiber link to be protected not same
One shared disaster risk region.Since spatial light spreading network information time delay is big, in order to avoid further increasing propagation delay time,
Select nearest earth station as turn of space optical-fiber network and terrestrial optical network for the head and the tail optical node of optical fiber link to be protected
Contact.Equipment due to being located at the same shared disaster risk region is influenced by disaster simultaneously, in order to avoid light to be protected
Fine link and earth station break down simultaneously, cannot select to be located at the same shared disaster risk area with optical fiber link to be protected
Transit point of the earth station in domain as space segment and ground segment.Such as in Fig. 3, labeled as the ground of connection selected by optical node S
Face station is S ', and S ' is and optical node S not in the same shared disaster risk region, nearest apart from optical node S earth station；
Labeled as connection selected by optical node D earth station be D ', D ' be with optical node D not in the same shared disaster risk region
, nearest apart from optical node D earth station.
Step S102: two accessible satellite L are selected respectively for above-mentioned two earth station S ', D 'S、LD。
In this step, for each earth station of selection, in the earth station, there are multiple accessible Low Earth Orbit LEO
In the case where satellite, will wherein have the LEO satellite of current maximum access duration as the satellite selected for the earth station.
Specifically, it is moved in a circle due to satellite around the earth, for each earth station, different time sections can
The satellite of access is different, and the period of each inserting of satellite is not also identical, it is therefore desirable to be selected in real time according to the position of earth station
Select accessible satellite.Due to the relative motion between satellite and between satellite and the earth so that between some stars optical link and
Star optical link because relative position change and fail, the annular link structure in technical solution of the present invention also has centainly
Life span.In order to enable the annular link structure established has longer life span, can access when for earth station's selection
LEO satellite when, when if there is multiple accessible LEO satellites, when there is current maximum access to continue for selection as much as possible
Between LEO satellite.Defining LEO (S ') at this time is all accessible LEO satellites of earth station S ', and LEO (D ') is earth station D ' institute
There is accessible LEO satellite.For each LEO satellite L ∈ LEO (S '), when calculating separately the sustainable access of L and earth station S '
Between T (L, S '), for example, as shown in figure 4, the sustainable turn-on time T of LEO1, LEO2, LEO3 is calculated1、T2、T3, then select
The LEO satellite of current maximum access duration, i.e., sustainable turn-on time are T3LEO3, be labeled as LSAs earth station S '
Access LEO satellite, T (L at this timeS, S ') and there is maximum value.It similarly, is earth station D ' selection access duration longest LEO
Satellite markers are LDAccess LEO satellite as earth station D '.
Step S103: it determines from satellite LSTo LDSpatial light link road by P (LS→LD)。
Specifically, it is determined that from satellite LSTo LDSpatial light link road by P (LS→LD) specific method process, such as Fig. 5 institute
Show, may include following sub-step:
Sub-step S501: by satellite LS、LDIt is added in satellite set V.
Specifically, for accessing LEO satellite LSAnd LDFor, the MEO of same track LEO satellite, middle orbit that it can be connected
Satellite and GEO satellite constantly change also with the time, need to be determined in real time depending on the relative position.Mark vacant lot one
Body optical-fiber network space segment Network Topology for Real-Time is G (V, E), and wherein V represents satellite set, and E represents laser link set, V and E
It is initialized to empty set；In this sub-step, LEO satellite L will be accessedSAnd LDIt is added in set V.
Sub-step S502: for each satellite in V, the LEO satellite, MEO satellite and GEO of being accessible to the satellite are defended
Star is added in V, until not having satellite that can be added in set V；And the laser link between set V Satellite is added to
In laser link set E, constitute space segment Network Topology for Real-Time G (V, E).
Specifically, according to access LEO satellite LSAnd LDReal time position, determination can connect LSOr LDLEO satellite, MEO defends
Star and GEO satellite, and be added in V, and corresponding laser link is added in laser link set E.It similarly, is each new
It is added to the satellite of V, selects it that can connect LEO satellite, MEO satellite and GEO satellite, and the satellite of these selections and is added
Enter in V, and corresponding laser link is added in laser link set E, and so on, until there is no satellite that can be added
Into set V, to complete the building of air-ground integrated optical-fiber network space segment Network Topology for Real-Time G (V, E).For example, Fig. 6 is shown
The schematic diagram of one space segment Network Topology for Real-Time G (V, E) completed, including 6 LEO satellites, 5 MEO satellites
With 1 GEO satellite.
Sub-step S503: after the laser link that idle frequency spectrum resource is less than preset bandwidth value is deleted from G (V, E),
One is calculated from satellite L using shortest path first in G (V, E)STo LDSpatial light link road by P (LS→LD)。
Specifically, every laser link sky is determined in air-ground integrated optical-fiber network space segment Network Topology for Real-Time G (V, E)
Not busy frequency spectrum resource deletes this if the frequency spectrum resource of laser link free time is less than preset bandwidth value between certain star from E
Laser link.Then one is calculated from LEO satellite L using shortest path first in G (V, E) in the updatedSTo LEO satellite LD
Spatial light link road by, and every pass through laser link on reserve preset bandwidth value frequency spectrum resource, using shortest path
The purpose of diameter algorithm is to minimize the time delay of space path.At this point, from LEO satellite LSTo LEO satellite LDBandwidth is preset bandwidth value
The routings of space light connects be denoted as P (LS→LD)。
Similarly, L is arrived in S 'SBetween satellite-ground link and LDPre-set bandwidths can also be reserved to the satellite-ground link between D '
The idle frequency spectrum resource of value reserves the port resource of preset bandwidth value in earth station S ' and earth station D '.
Above-mentioned preset bandwidth value can be true according to the bandwidth of business to be protected in the optical fiber link to be protected
Fixed, for example, preset bandwidth value can be set to the bandwidth B bit/s of business to be protected.
Step S104: to S, D, S ', D ' and P (LS→LD) pass through each satellite configured, formed S → S ' → LS
→P(LS→LD)→LDThe annular link structure of → D ' → D → S.
, can be to S, D, S in this step ', D ' and P (LS→LD) each satellite for passing through configured: to from the ring
On shape link structure each node configuration be left in advance next node, bandwidth be not less than preset bandwidth value port resource, and
The routing of annular link structure is sent to each node on annular link structure.Wherein, S → S ' → LS→P(LS→LD)→
LD→ D ' → D → S expression is from S to S ' to LS, using P (LS→LD) to LDThe link of S is returned to D ' to D.
Specifically, since building ring shaped guard structures need to occupy the backup frequency spectrum resource and ring protection knot of same size
The direction of structure is opposite with traffic direction to be protected, it is therefore desirable to which it is B bit/s that size is reserved in optical fiber link to be protected
And direction is the idle frequency spectrum resource of D → S.At this time if spectral bandwidth idle in optical fiber link to be protected is less than B bit/
On the one hand s can reduce service bandwidth to be protected until idle frequency spectrum resource meets condition；It on the other hand can be standby from its
Idle spectral bandwidth is reserved on the optical fiber link of part.It is assumed that it is B bit/ that optical fiber link to be protected, which certainly exists size,
The idle frequency spectrum resource of s.Currently, laser space communication mainly carries out the multiplexing of optical signal by the way of wavelength-division multiplex, therefore
The protection of resource can be carried out according to the other granularity of wavelength level and is reserved.Therefore, B bit/s frequency spectrum resource translate into one or
The frequency spectrum resource of the multiple wavelength of person, network manager can be determined flexibly according to the actual situation.Fig. 7 shows endless chain
The configuring condition of line structure interior joint.From figure 7 it can be seen that the normal work connection of optical node S is: with optical fiber chain to be protected
The connected port in road is the exit port of business, is for the annular link structure connection of optical node S configuration: being connected with earth station S '
Port is the exit port of business, and port resource bandwidth is not less than preset bandwidth value；
The normal work connection of optical node D is: the port being connected with optical fiber link to be protected is the inlet side mouthful of business, is
The annular link structure connection of optical node D configuration is: the port being connected with earth station D ' is the inlet side mouthful of business, and port resource
Bandwidth is not less than preset bandwidth value；
Connecting for the earth station in annular link structure with the annular link structure that satellite configures is: for present node
Speech, the port being connected with the upper node in annular link structure is the inlet side mouthful of the business of this node, with annular link structure
In the connected port of next node be this node business exit port, and port resource bandwidth is not less than preset bandwidth value.
For example, configuring earth station S ' and earth station D ', optical node D by the control signaling of satellite and the controller on ground
With optical node S and P (LS→LD) pass through every satellite, carry out interconnection operation, construct S → S ' as shown in Figure 8 →
LS→P(LS→LD)→LDThe bandwidth of the annular link structure of → D ' → D → S, this annular link structure is not less than pre-set bandwidths
Value, such as preset bandwidth value are equal to the bandwidth B bit/s of business to be protected.It is assumed that optical node S is to earth station S ' and light
The bandwidth of node D to earth station D ' is infinity.
Step S105: in optical fiber link failure or D → D ' → L of S → DD→P(LD→LS)→LS→ S ' → S is upper any
When one link surprisingly fails, service protection is carried out using the ring light link structure.
In this step, optical fiber link to be protected breaks down in the transmission direction from S to D, i.e. the optical fiber link of S → D
When failure, alternatively, D → D ' → LD→P(LD→LSWhen the upper any one link of) → LS → S ' → S surprisingly fails, faulty link or
Node involved in unexpected failed link can carry out service protection using the ring light link structure.
Wherein, P (LD→LS) it is P (LS→LD) reverse routing；D→D'→LD→P(LD→LS) → LS → S ' → S is indicated
From D to D ' to LD, using P (LD→LS) to LSLink to S ' to S.
Specifically, under optical fiber link fault condition to be protected and between star optical link or star optical link surprisingly lose
It can carry out automatically switching to annular link structure in the case of effect and continue the transmission of business datum, to quickly protect industry
Business.The bandwidth of building is not less than S → S ' → L of preset bandwidth valueS→P(LS→LD)→LDThe annular link knot of → D ' → D → S
Structure can not only be protected not less than the business of preset bandwidth value for the upper bandwidth of optical fiber link S → D, while can be S ' → LS
→P(LS→LD)→LDThe upper any one link of → D ' provides the protection that bandwidth is not less than preset bandwidth value.For example, such as Fig. 9 institute
Show, when optical fiber link S → D breaks down, it is only necessary to return the optical node S inlet side choma for working normally the business under connection
The exit port of the business under the annular link structure connection of most optical node S configuration is connected, it is similarly, optical node D is normal
Under the annular link structure connection of the exit port loopback connection most optical node D configuration of business under the connection that works
The inlet side mouthful of business, to realize path S → S ' → L in the service switching on S → D to annular link structureS→P(LS→
LD)→LDThe protection of interrupting service can be realized on → D ' → D.Due to the ring shaped guard structures meeting using spatial light network struction
Due between satellite and the relative motion of satellite and the earth fails, since it is desired that being pressed before the ring shaped guard structures failure of building
New annular link structure is rebuild according to the above process, guarantees that there is the presence of ring shaped guard structures in any time.
That is, can be used and above-mentioned steps S102~step before current ring light link structure failure
The identical method of S104 selects two accessible satellites to be denoted as L respectively for described two earth station S ', D ' againS′、LD′；Into
And it determines from satellite LS' to LD' spatial light link road by P (LS′→LD′)；To S, D, S ', D ' and P (LS′→LD') pass through
Each satellite configured, formed S → S ' → LS′→P(LS′→LD′)→LD' → D ' → D → S new annular link knot
Structure forms the lasting protection to optical fiber link to be protected.
In fact, in air-ground integrated optical-fiber network, since the running track of communication network node, speed are different,
And the variability of space environment makes certain barriers cause to block to laser signal, contract network topology has with leading to star
The characteristics of high dynamic.Star contract network topological structure be controller be traffic assignments routing and link circuit resource basis.
Therefore, based on the above-mentioned service protecting method based on air-ground integrated annular link structure, the present invention is implemented
A kind of service protection device based on air-ground integrated annular link structure that example provides can be set in towards vacant lot one
In the controller for changing optical-fiber network, as shown in Figure 10, including following module: earth station's selecting module 1001, the select of satellite module
1002, spatial light link road is by determining module 1003, annular link structure configuration module 1004.
Wherein, head and the tail optical node S, D that earth station's selecting module 1001 is used for as optical fiber link to be protected, select respectively
Accessible Liang Ge earth station S ', D '；Specifically, earth station's selecting module 1001 can be optical node S, D, select not exist respectively
Distance in the same shared disaster risk region nearest Liang Ge earth station S ', D '.
The select of satellite module 1002 is used to select two accessible satellite L respectively for described two earth station S ', D 'S、
LD；Specifically, the select of satellite module 1002 can be for each earth station of selection, and in the earth station, there are multiple accessible
In the case where Low Earth Orbit LEO satellite, will wherein have the LEO satellite of current maximum access duration as the ground
It stands the satellite of selection.
Spatial light link road is by determining module 1003 for determining from satellite LSTo LDSpatial light link road by P (LS→
LD)；Specifically, spatial light link road can be by satellite L by determining module 1003S、LDIt is added in satellite set V；And for V
In each satellite, the LEO satellite, MEO satellite and GEO satellite that are accessible to the satellite are added in V, until there is no satellite
It can be added in set V；And the laser link between set V Satellite is added in laser link set E, constitute space
Section Network Topology for Real-Time G (V, E)；Later, idle frequency spectrum resource is less than the laser link of preset bandwidth value from G (V, E)
After deletion, one is calculated from satellite L using shortest path first in G (V, E)STo LDSpatial light link road by P (LS→
LD)。
Annular link structure configuration module 1004 is used for S, D, S ', D ' and P (LS→LD) pass through each satellite carry out
Configuration forms S → S ' → LS→P(LS→LD)→LDThe annular link structure of → D ' → D → S；And by the annular link structure
The each node being issued in the annular link structure, so that in optical fiber link failure or D → D ' → L of S → DD→P(LD
→LS)→LSWhen the upper any one link of → S ' → S surprisingly fails, node involved in faulty link or unexpected failed link can
Service protection is carried out using the ring light link structure.
Further, a kind of service protection dress based on air-ground integrated annular link structure provided in an embodiment of the present invention
It can also include: annular link structure update module 1005 in setting.
Annular link structure update module 1005 is used for before current annular link structure failure to the select of satellite
Module sends the select of satellite notice；
Correspondingly, the select of satellite module 1002 is also used to after receiving the select of satellite notice, is again described two
A earth station S ', D ' select two accessible satellite L respectivelyS′、LD', and sent out to the spatial light link road by determining module
Routing is sent to determine notice；
Correspondingly, spatial light link road is also used to after receiving the routing and determining notice by determining module 1003, really
Determine from satellite LS' to LD' spatial light link road by P (LS′→LD′)；And to the annular link structure configuration module send chain
Line structure configuration notification；
Correspondingly, annular link structure configuration module 1004 is also used to after receiving the link structure configuration notification,
To S, D, S ', D ' and P (LS′→LD') pass through each satellite configured, formed S → S ' → LS′→P(LS′→LD′)→
LD' → D ' → D → S new annular link structure, as current annular link structure；And by the new annular link structure
The each node being issued in the new annular link structure, so that in optical fiber link failure or D → D ' → L of S → DD′→
P(LD′→LS′)→LSWhen the upper any one link of ' → S ' → S surprisingly fails, involved in faulty link or unexpected failed link
Node can carry out service protection using the new ring light link structure.
The technical solution of the embodiment of the present invention provides a kind of service protection based on air-ground integrated annular link structure
Method is head and the tail optical node S, D of optical fiber link to be protected, selects earth station S ', D ' and accessible satellite LS、LD, determine
From satellite LSTo LDSpatial light link road by P (LS→LD) after, S → S ' → L of space segment and ground segment is covered in buildingS→P(LS
→LD)→LDThe annular link structure of → D ' → D → S；When ground optical fiber link break down or star between, satellite-ground link occur
Directly working service is switched in annular link structure when unexpected failure, can protect ground optical fiber link under disaster scene
Service protection, with being also able to achieve optical link and star between star when optical link failure business quick protection, it is true so as to realize
Anti- in positive meaning is ruined；
Moreover, because between star in annular link structure of the invention, the light connects between star ground, mainly pass through laser
Signal carries out the transmission of business datum, therefore, optical signal in the optical fiber link on ground without carry out complicated signal, agreement,
The conversion such as rate, so that it may quickly carry out service protection using the light connects between the star in annular link structure, between star ground.
Those skilled in the art of the present technique are appreciated that the present invention includes being related to for executing in operation described herein
One or more equipment.These equipment can specially design and manufacture for required purpose, or also may include general
Known device in computer.These equipment have the computer program being stored in it, these computer programs are selectively
Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) readable medium or be stored in
It e-command and is coupled in any kind of medium of bus respectively suitable for storage, the computer-readable medium includes but not
Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only
Read memory), RAM (Random Access Memory, immediately memory), EPROM (Erasable Programmable
Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable
Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card
Piece.It is, readable medium includes by equipment (for example, computer) with any Jie for the form storage or transmission information that can be read
Matter.
Those skilled in the art of the present technique be appreciated that can be realized with computer program instructions these structure charts and/or
The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology neck
Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other
The processor of programmable data processing method is realized, to pass through the processing of computer or other programmable data processing methods
The scheme specified in frame or multiple frames of the device to execute structure chart and/or block diagram and/or flow graph disclosed by the invention.
Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.Therefore, it is all
Within the spirit and principles in the present invention, any omission, modification, equivalent replacement, improvement for being made etc. be should be included in of the invention
Within protection scope.
Claims (10)
1. a kind of service protecting method based on air-ground integrated annular link structure characterized by comprising
For head and the tail optical node S, D of optical fiber link to be protected, accessible Liang Ge earth station S ', D ' are selected respectively, is described
Liang Ge earth station S ', D ' select two accessible satellite L respectivelyS、LD；
It determines from satellite LSTo LDSpatial light link road by P (LS→LD)；
To S, D, S ', D ' and P (LS→LD) pass through each satellite configured, formed S → S ' → LS→P(LS→LD)→LD
The annular link structure of → D ' → D → S；
In optical fiber link failure or D → D ' → L of S → DD→P(LD→LS)→LSThe upper any one link of → S ' → S surprisingly loses
When effect, service protection is carried out using the ring light link structure.
2. the method according to claim 1, wherein the head and the tail optical node S for optical fiber link to be protected,
D selects accessible Liang Ge earth station S ', D ' respectively, specifically includes:
For optical node S, D, the Liang Ge earth station S ' for selecting the distance not in the same shared disaster risk region nearest respectively,
D’。
3. the method according to claim 1, wherein described select two for described two earth station S ', D ' respectively
A accessible satellite LS、LD, it specifically includes:
For each earth station of selection, in the earth station there are in the case where multiple accessible Low Earth Orbit LEO satellites,
To wherein have the LEO satellite of current maximum access duration as the satellite selected for the earth station.
4. the method according to claim 1, wherein the determination is from satellite LSTo LDSpatial light link road by P
(LS→LD), it specifically includes:
By satellite LS、LDIt is added in satellite set V；
For each satellite in V, the LEO satellite, MEO satellite and GEO satellite that are accessible to the satellite are added in V, directly
It can be added in set V to no satellite；And
Laser link between set V Satellite is added in laser link set E, space segment Network Topology for Real-Time G is constituted
(V,E)；
After the laser link that idle frequency spectrum resource is less than preset bandwidth value is deleted from G (V, E), using most in G (V, E)
Short path algorithm calculates one from satellite LSTo LDSpatial light link road by P (LS→LD)。
5. the method according to claim 1, wherein described to S, D, S ', D ' and P (LS→LD) pass through it is every
A satellite is configured, and S → S ' → L is formedS→P(LS→LD)→LDThe annular link structure of → D ' → D → S, specifically includes:
It is left to next node, bandwidth in advance not less than preset bandwidth value for each node configuration on the annular link structure
Port resource.
6. method according to claim 4 or 5, which is characterized in that the preset bandwidth value is according to described to be protected
The bandwidth of business to be protected determines in optical fiber link.
7. -5 any method according to claim 1, which is characterized in that further include:
Before ring light link structure failure, again for described two earth station S ', D ' select respectively two it is accessible
Satellite LS′、LD′；
It determines from satellite LS' to LD' spatial light link road by P (LS′→LD′)；
To S, D, S ', D ' and P (LS′→LD') pass through each satellite configured, formed S → S ' → LS′→P(LS′→
LD′)→LD' → D ' → D → S new annular link structure.
8. a kind of controller characterized by comprising
Earth station's selecting module selects accessible two for head and the tail optical node S, D for optical fiber link to be protected respectively
Earth station S ', D '；
The select of satellite module, for selecting two accessible satellite L respectively for described two earth station S ', D 'S、LD；
Spatial light link road is by determining module, for determining from satellite LSTo LDSpatial light link road by P (LS→LD)；
Annular link structure configuration module, for S, D, S ', D ' and P (LS→LD) pass through each satellite configured, shape
At S → S ' → LS→P(LS→LD)→LDThe annular link structure of → D ' → D → S；And the annular link structure is issued to
Each node in the annular link structure, so that in optical fiber link failure or D → D ' → L of S → DD→P(LD→LS)
→LSWhen the upper any one link of → S ' → S surprisingly fails, node involved in faulty link or unexpected failed link is available
The ring light link structure carries out service protection.
9. controller according to claim 8, which is characterized in that further include:
Annular link structure update module, for being sent before current annular link structure failure to the select of satellite module
The select of satellite notice；And
The select of satellite module is also used to after receiving the select of satellite notice, be again described two earth station S ',
D ' selects two accessible satellite L respectivelyS′、LD', and sent routing by determining module to the spatial light link road and determined and led to
Know；And
The spatial light link road is also used to after receiving the routing and determining notice by determining module, is determined from satellite LS' extremely
LD' spatial light link road by P (LS′→LD′)；And it is logical to the annular link structure configuration module transmission link structure configuration
Know；And
It is described annular link structure configuration module be also used to after receiving the link structure configuration notification, to S, D, S ', D '
And P (LS′→LD') pass through each satellite configured, formed S → S ' → LS′→P(LS′→LD′)→LD′→D’→D→
The new annular link structure of S；And the new annular link structure is issued to each section in the new annular link structure
Point, so that in optical fiber link failure or D → D ' → L of S → DD′→P(LD′→LS′)→LSThe upper any one chain of ' → S ' → S
When road is surprisingly failed, node involved in faulty link or unexpected failed link can carry out industry using the ring light link structure
Business protection.
10. controller according to claim 8, which is characterized in that
The spatial light link road is specifically used for by determining module by satellite LS、LDIt is added in satellite set V；And in V
The LEO satellite, MEO satellite and GEO satellite that are accessible to the satellite are added in V, until not having satellite can by each satellite
It is added in set V；And the laser link between set V Satellite is added in laser link set E, it is real to constitute space segment
When network topology G (V, E)；Later, the laser link that idle frequency spectrum resource is less than to preset bandwidth value is deleted from G (V, E)
Afterwards, one is calculated from satellite L using shortest path first in G (V, E)STo LDSpatial light link road by P (LS→LD)。
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