CN104954160B - A kind of method that realizing bearer network multiple protective and bearer network - Google Patents
A kind of method that realizing bearer network multiple protective and bearer network Download PDFInfo
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- CN104954160B CN104954160B CN201410123253.8A CN201410123253A CN104954160B CN 104954160 B CN104954160 B CN 104954160B CN 201410123253 A CN201410123253 A CN 201410123253A CN 104954160 B CN104954160 B CN 104954160B
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Abstract
The invention discloses a kind of methods for realizing network carrying multiple protective; the described method includes: SDH and PTN are uniformly carried on optical transfer network OTN; different routing optical cables are established in each core interoffice of OTN core layer; calculate source to destination shortest path, and using the shortest path as Protection path.The invention also discloses a kind of bearer network for realizing multiple protective, the bearer network includes: SDH, PTN and OTN；Wherein, the SDH and PTN is uniformly carried on OTN by radio frequency channel；The OTN includes: core layer and convergence layer, and each core interoffice of the core layer has different routing optical cables；The OTN further include: calculate equipment, the shortest path for calculating source to destination, the shortest path is as Protection path.
Description
Technical field
The present invention relates in transmission net protection technique more particularly to a kind of method for realizing bearer network multiple protective and
Bearer network.
Background technique
Currently, bearer network include: synchronization digital system (Synchronous Digital Hierarchy,
SDH), Packet Transport Network (Packet Transport Network, PTN) and optical transfer network (Optical Transport
Network, OTN) etc.；Wherein, 2G business is mainly carried on SDH, and 3G business is mainly carried on PTN.
The network structure of SDH, PTN, OTN include core layer, convergence ring and access ring three parts, specifically, SDH
Core layer mainly carried by bare fibre, the convergence ring of SDH is generally carried by optical cable, it is long away from paragraph by OTN carrying,
The access ring of SDH is carried by optical cable；The core layer of PTN is carried by OTN or bare fibre, and the convergence ring of PTN generally passes through OTN
Or optical cable carrying, the access ring of PTN are carried by optical cable；Therefore, SDH, PTN, OTN are relatively independent, lack uniformity, right
When SDH, PTN, OTN are optimized and protected respectively, it is unfavorable for making full use of for rare protection resource；Also, to SDH, PTN,
OTN, which is optimized and safeguarded respectively, will consume more man power and materials.
On the one hand, existing SDH, PTN, OTN core interoffice loop is based only on the passive fiber of SDH, PTN, OTN oneself
The electric layer wavelet length 1+1 protection of network (Passive Optical Network, PON) business；In OTN, electric layer wavelet length system
System specifically includes that branch convergence unit, electric cross unit, group road convergence unit；Electric cross unit hands over the basic frame unit of OTN
Fork, when receiving optical signal, converge the basic frame single unit of OTN after unit convergence intersects on group road, then complete by branch convergence unit
Function is demultiplexed at one or more service signal of branch trackside, realizes the flexible dispatching of electric layer wavelet length.
By taking a kind of existing metro dense wave-division multiplexing equipment as an example, electric layer wavelet length 1+1 protection principle is briefly explained, is such as schemed
Shown in 1, COMB be branch converge plate, LD2 be group road converge plate, CSUB be clock and signal cross processing unit, the one of COMB
A sub- wavelength signals are connected to CSUB by core bus, and CSUB is by this signal while being sent to two different LD2, then by
Side wavelength-division light-path (OPTICALCHANNEL, OCH) of LD2 is sent to operating path and Protection path respectively, and then is realized " simultaneously
Hair " function；In receiving end, CSUB receives the business sent from the LD2 of operating path and Protection path simultaneously, according to preferred stripe
Part, wherein the good business of signal quality is sent to COMB for selection, realizes " excellent receipts " function；It can generally select the industry of operating path
Business is sent to COMB, and after interrupting occurs in the service signal of operating path or quality is deteriorated, CSUB receives Protection path
Business, and then guarantee the normal transmission of business.
But since the core interoffice loop of SDH, PTN, OTN are based only on the PON of SDH, PTN, OTN oneself) business
Electric layer wavelet length 1+1 protection, also, SDH, PTN, OTN are required to carry out stringent double route separation；Therefore, with business
Increase, converge the increase of the quantity of ring at double, the overlapping and same routing separation of convergence layer optical cable and core layer optical cable is extremely difficult；
It is separating not at that time, can also generate core convergence layer multipoint fault, business is caused largely to be interrupted.
On the other hand, the network protection of SDH, PTN and OTN convergence layer generally uses single looped network protection, for segment section
It falls and automatically switches that (Optical Line Protection, OLP) system is protected to be overlapped protection using optical link；OLP system
Automatically switch protector and webmastering software including optical link, more optical links automatically switch protector and an operation webmastering software
Computer constitute OLP system；On optical transmission line road, optical fiber, which is surprisingly fractureed or is lost, to become larger when communication quality being caused to decline,
Optical transmission line routing primary route automatically can be switched to alternate routing in a very short period of time by OLP system, in this way, can be with
Communicating interrupt time from a few hours that Cable's Fault causes are compressed to several milliseconds by effectively prevention Cable's Fault, to guarantee logical
Believe system worked well.
The working principle of OLP system, as shown in Fig. 2, have two lines road between website A and website B, optical transmission system choosing
A route therein is selected as primary route, for another route as extension wire, extension wire is used for transmission secondary signal
Or do not transmit signal；It is caused under communication quality when certain optical fiber/optical cable in primary route or primary route breaks down
Drop, the receiving end of primary route monitor signal power decline when, automatically will transmission signal routing from primary circuit switching to
The OLP equipment of extension wire, the other end can be synchronously by circuit switching to extension wire, to guarantee signal normal transmission.
But the network of protection is overlapped using OLP for part paragraph, since OLP paragraph disperses, lack rule
Property, it is thus impossible to realize for emphasis service area, such as: the protection of three routing sources of central station at county level to destination.
Summary of the invention
In view of this, an embodiment of the present invention is intended to provide a kind of method for realizing bearer network multiple protective and bearer networks
Network realizes the unified carrying of SDH, PTN, OTN, and protection and double break failure between convergence layer and core layer cause looped network to be protected
When shield failure, the protection of convergence layer key area.
The technical solution of the embodiment of the present invention is achieved in that
The embodiment of the present invention provides a kind of method for realizing bearer network multiple protective, comprising: by synchronous digital system system
System SDH and Packet Transport Network PTN is uniformly carried on optical transfer network OTN；It is established in each core interoffice of OTN core layer different
Route optical cable；Calculate source to destination shortest path, and using the shortest path as Protection path.
Preferably, it states and is uniformly carried on SDH and PTN on OTN, comprising: utilize short distance optical interface and OTN radio frequency channel plate pair
It connects, SDH and PTN is carried on OTN by radio frequency channel.
Preferably, shortest path of the calculating source to destination, comprising: the consuming value of calculating source to destination,
Source is obtained to destination shortest path according to the minimum consuming value obtained is calculated.
Preferably, the consuming value for calculating source and arriving destination, are as follows: it is arrived according to COST=(∑ cost) × Q calculating source
The consuming value of destination；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight.
Preferably, the paragraph are as follows: the distance between two websites, cost is set according to actual needs, and Q is that core office arrives
The ratio of paragraph number in the paragraph number and OTN loop that destination node is passed through.
The embodiment of the present invention also provides a kind of bearer network for realizing multiple protective, comprising: SDH, PTN and OTN；Institute
SDH and PTN is stated uniformly to be carried on OTN by radio frequency channel；
The OTN includes: core layer and convergence layer, and each core interoffice of the core layer is provided with different routing light
Cable；
The OTN further include: calculate equipment, the shortest path for calculating source to destination, the shortest path is made
For Protection path.
Preferably, described to be uniformly carried on SDH and PTN on OTN, comprising: to utilize short distance optical interface and OTN radio frequency channel plate
Docking, SDH and PTN are carried on OTN by radio frequency channel.
Preferably, shortest path of the calculating source to destination, comprising:
Source is calculated to the consuming value of destination, it is most short to destination that source is obtained according to the minimum consuming value for calculating acquisition
Path.
Preferably, the consuming value for calculating source and arriving destination, are as follows: it is arrived according to COST=(∑ cost) × Q calculating source
The consuming value of destination；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight.
Preferably, the paragraph are as follows: the distance between two websites, cost is set according to actual needs, and Q is that core office arrives
The ratio of paragraph number in the paragraph number and OTN loop that destination node is passed through.
The method and bearer network that bearer network multiple protective is realized provided by the embodiment of the present invention, first by SDH and PTN
It is uniformly carried on OTN, in this way, can make full use of protection money when needing to optimize SDH, PTN, OTN and safeguard
Source；Establish different routing optical cables in each core interoffice of OTN core layer again, realize automatic circuit protection switching, avoid due to
Core layer and convergence layer multipoint fault caused by separation difficulty caused by multiple same routings are overlapping and separation are improper；Finally converging
Poly layer calculates source to the shortest path of destination, and using the shortest path as Protection path, realizes in the event of looped network double break
When barrier causes looped network protection to fail, emphasis service area is protected, and then realize the multiple protective of the network carrying, make to throw
It provides efficiency and protection efficiency maximizes.
Detailed description of the invention
Fig. 1 is electric layer wavelet length 1+1 protection schematic illustration；
Fig. 2 is the operation principle schematic diagram of OLP system；
Fig. 3 embodiment of the present invention realizes the basic handling flow diagram of the method for network carrying multiple protective；
Fig. 4 is that SDH and PTN is uniformly carried on the light web frame schematic diagram on OTN by the embodiment of the present invention；
Fig. 5 is the network topology that the embodiment of the present invention establishes different routing optical cables in each core interoffice of OTN core layer
Schematic diagram；
Fig. 6 establishes different routing optical cables in each core interoffice of OTN core layer for the embodiment of the present invention and realizes multiple spots event
Hinder the schematic illustration of protection；
Fig. 7 is shortest path of embodiment of the present invention Computing Principle schematic diagram；
Fig. 8 is the composed structure schematic diagram for the bearer network that the embodiment of the present invention realizes multiple protective.
Specific embodiment
In embodiments of the present invention, SDH and PTN are uniformly carried on OTN, in each core interoffice of OTN core layer
Different routing optical cables are established, finally the shortest path of calculating source to destination, and using the shortest path as Protection path.
Specifically, shortest path of the calculating source to destination, comprising: the consuming value of calculating source to destination,
Source is obtained to destination shortest path according to the minimum consuming value obtained is calculated；
Wherein, the consuming value for calculating source to destination includes: and calculates source according to COST=(∑ cost) × Q to arrive
The consuming value of destination；
Here, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight；The paragraph are as follows:
The distance between two websites, cost is set according to actual needs, and Q is the paragraph number and OTN that core office is passed through to destination node
The ratio of paragraph number in loop.
A kind of basic handling process of the method for multiple protective of the embodiment of the present invention is as shown in Figure 3, comprising the following steps:
Step 101, SDH and PTN are uniformly carried on OTN；
Specifically, SDH and PTN are uniformly carried on the light web frame on OTN, as shown in figure 4, utilizing short distance optical interface
It is docked with OTN radio frequency channel plate, SDH and PTN is carried on OTN by 2.5G or 10G or 10GE radio frequency channel；
Wherein, it when SDH and PTN being uniformly carried on OTN, needs to separate the core layer of OTN and convergence layer, with
And separate the core layer of OTN and convergence layer power-supply system, avoid the failure of OTN core equipment that bearer service is caused to hinder entirely；
When SDH and PTN are uniformly carried on OTN, need to place one end OTN in each light direction of convergence layer end office (EO) and set
It is standby, guarantee that one direction equipment failure does not influence other direction optical paths；
When SDH and PTN are uniformly carried on OTN, it is also necessary to which the core office that two or more is connected with convergence layer is to respectively
Topology connection and network element between a aggregation node are consistent.
Step 102, different routing optical cables are established in each core interoffice of OTN core layer；
The network topological diagram of different routing optical cables is established in each core interoffice of OTN core layer, as shown in figure 5, due to
Convergence layer optical cable and a core layer optical cable with routing or do not overlap necessarily with routing or overlapping with another core layer optical cable.
Therefore, routing optical cable by each core interoffice difference of core layer can realize that OLP switches；When the point that there is same routing or overlap
When failure, auto switching to another core layer Optical Cable；To guarantee core layer and convergence layer is not in double break
Failure.
Specifically, realize that each core interoffice of OTN core layer establishes different routing optical cables, and in optical cable construction, core
Layer only in responsible core layer optical cable different routings, convergence layer is only responsible for the different routings of optical cable in convergence layer, in this way, can simplify
Isolated difficulty is routed, is avoided multiple with the overlapping hidden danger of routing；Also, when core layer and convergence layer break down simultaneously, energy
Enough protection business are unaffected.
Different routing optical cables, which are established, the following detailed description of each core interoffice in OTN core layer realizes multipoint fault protection
Principle, as shown in fig. 6, the optical cable of the optical cable of core office A1 to core office B1 and core office A1 to core office D1 are the one of urban district
Have overlapping in a well, when caving within the border, the optical cable and core office A1 that will lead to core office A1 to core office B1 are to core
The optical cable of office D1 interrupts simultaneously.In Fig. 6, black heavy line indicates that Optical Cable, black thick dashed line indicate OLP Optical Cable, star
Shape Polygons Representation fault point.
In the present embodiment, SDH and PTN is uniformly carried on OTN, and between core office A1 and core office B1 establish by
The different routings that OLP optical cable is realized；In this way, the optical cable of the optical cable of core office A1 to core office D1 and core office A1 to core office B1
With routing, the optical cable of core office A1 to core office D1 and the OLP optical cable difference of core office A1 to core office B1 are routed；In core office
When the optical cable of A1 to core office B1 break down, business is from core office A1 to the OTN link switching of core office B1 to core office A1
To the OLP optical cable of core office B1, equally, SDH, PTN link being carried on OTN all keep normal operating conditions.
At this point, being reached after the service path of core office D to core office A1 is core office D to core office B1 by OLP link
Core office A1, realize nucleus routing it is more in the case where, the service protection between core layer and convergence layer.
Step 103, calculate source to destination shortest path, and using the shortest path as Protection path；
Specifically, calculating consuming value of the source to destination, the minimum consuming value acquisition source obtained further according to calculating first
Hold destination shortest path；
Here, consuming value of the calculating source to destination are as follows: source is calculated to mesh according to COST=(∑ cost) × Q
End consuming value；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight；The paragraph are as follows:
The distance between two websites, cost is set according to actual needs, and Q is the paragraph number and OTN that core office is passed through to destination node
The ratio of paragraph number in loop.
Referring to Fig. 7 the present invention will be described in detail embodiment calculate source to destination consuming value detailed process；
By taking Fig. 7 as an example, emphasis service area OTM-C node 1 and emphasis service area OTM-C node 2 are targeted sites, with convergence
The connected core office 1 of layer and core office 2 are Source Site；The consuming of source to destination is calculated according to COST=(∑ cost) × Q
Value；Wherein,
Emphasis service area refers to county town or township of the population 100,000 or more；It is answered since emphasis service area needs to have three routings
Anxious protective capability, and business is concentrated mainly on core office, therefore, when carrying out service protection, unidirectional source need to be realized to mesh
End reach a certain core office, it may be assumed that three route protections of source to destination.
COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight；
Specifically, the distance between two websites are known as a paragraph；Paragraph includes hop and end office's section, during one end has
Paragraph after station is hop, and both ends network element is entirely that the paragraph of terminal device is known as end office's section；Wherein, an emphasis service area
Two nodes between cannot function as paragraph, cannot function as paragraph between two core offices.
The cost of each paragraph is set according to actual needs, and in the present embodiment, the paragraph cost less than 80 kilometers, which is arranged, is
1, the paragraph cost greater than 80 kilometers and less than 100 kilometers is 2, and the paragraph cost greater than 100 kilometers and less than 120 kilometers is 3,
The cost for relaying paragraph is 2, and the cost of terminal paragraph is 5.
Q is the ratio of paragraph number and paragraph number in OTN loop that core office is passed through to destination node；The embodiment of the present invention
In, paragraph number is 8 in OTN loop, and the paragraph number passed through from core office 1 to emphasis service area OTM-C node 2 is 5, from core office
The paragraph number of 2 to the process of emphasis service area OTM-C node 1 is 3.
Therefore, from core office 1 to COST=16 × 5/8=10 of emphasis service area OTM-C node 2；
From core office 2 to COST=14 × 3/8=5.25 of emphasis service area OTM-C node 1；
It is from core office 2 to emphasis industry according to the shortest path that the path consuming value being calculated obtains source to destination
The paragraph of business area OTM-C node 1；This path is selected to carry out OLP.
Method to realize above-mentioned multiple protective, the embodiment of the invention also provides a kind of bearer networks for realizing multiple protective
The composed structure of network, the bearer network is as shown in Figure 8, comprising: SDH11, PTN12 and OTN13；
Wherein, the SDH11 and PTN12 is uniformly carried on OTN13 by radio frequency channel；
The OTN includes: core layer and convergence layer, and each core interoffice of the core layer is provided with different routing light
Cable；
The OTN further include: calculate equipment 110, the shortest path for calculating source to destination, the shortest path
As Protection path.
Wherein, the calculating equipment can pass through existing software realization.
Here, described to be uniformly carried on SDH and PTN on OTN, comprising: to utilize short distance optical interface and OTN radio frequency channel plate pair
It connects, SDH and PTN is carried on OTN by radio frequency channel.
Shortest path of the calculating source to destination, comprising: the consuming value of calculating source to destination, according to calculating
The minimum consuming value of acquisition obtains source to destination shortest path.
Here, consuming value of the calculating source to destination are as follows: source is calculated to mesh according to COST=(∑ cost) × Q
End consuming value；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight.The paragraph is specific
Are as follows: the distance between two websites, cost is set according to actual needs, Q be the paragraph number that core office is passed through to destination node and
The ratio of paragraph number in OTN loop.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of method for realizing bearer network multiple protective, which is characterized in that the described method includes:
Synchronization digital system SDH and Packet Transport Network PTN are uniformly carried on optical transfer network OTN；
Different routing optical cables are established in each core interoffice of the OTN core layer, the different routing optical cables are for passing through light
The automatic switchover of route automatic switchover protection device OLP realization optical link；
Calculate source to destination shortest path, and using the shortest path as the Protection path of the OLP；
Wherein, when the SDH and the PTN being uniformly carried on the OTN, by the core layer of the OTN and convergence layer into
Row separation, and the power-supply system of the core layer of the OTN and the convergence layer is separated.
2. realizing the method for bearer network multiple protective according to claim 1, which is characterized in that described that SDH and PTN unites
One is carried on OTN, comprising: is docked using short distance optical interface with OTN radio frequency channel plate, SDH and PTN are carried on by radio frequency channel
On OTN.
3. realizing the method for bearer network multiple protective according to claim 1, which is characterized in that the calculating source to mesh
End shortest path, comprising:
Source is calculated to the consuming value of destination, obtains source to destination shortest path according to the minimum consuming value obtained is calculated
Diameter.
4. realizing the method for bearer network multiple protective according to claim 3, which is characterized in that the calculating source to mesh
End consuming value, are as follows:
According to COST=(∑ cost) × Q calculating source to destination consuming value；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight.
5. realizing the method for bearer network multiple protective according to claim 4, which is characterized in that the paragraph are as follows: two
The distance between website, cost are set according to actual needs, and Q is the paragraph number and OTN loop that core office is passed through to destination node
The ratio of interior paragraph number.
6. a kind of bearer network for realizing multiple protective, which is characterized in that the bearer network includes: SDH, PTN and OTN；
The SDH and PTN is uniformly carried on OTN by radio frequency channel；
The OTN includes: core layer and convergence layer, and each core interoffice of the core layer is provided with different routing optical cables, institute
State different routing optical cables for by optical link automatic switchover protection device OLP realization multipoint fault protection；
The OTN further include: calculate equipment, the shortest path for calculating source to destination, the shortest path is as institute
State the Protection path of OLP；
Wherein, when the SDH and the PTN are uniformly carried on the OTN, by the core layer and the remittance of the OTN
Poly layer is separated, and the power-supply system of the core layer of the OTN and the convergence layer is separated.
7. realizing the bearer network of multiple protective according to claim 6, which is characterized in that described uniformly to hold SDH and PTN
It is loaded on OTN, comprising: docked using short distance optical interface with OTN radio frequency channel plate, SDH and PTN are carried on OTN by radio frequency channel.
8. realizing the bearer network of multiple protective according to claim 6, which is characterized in that the calculating source to destination
Shortest path, comprising:
Source is calculated to the consuming value of destination, obtains source to destination shortest path according to the minimum consuming value obtained is calculated
Diameter.
9. realizing the bearer network of multiple protective according to claim 8, which is characterized in that the calculating source to destination
Consuming value, are as follows:
According to COST=(∑ cost) × Q calculating source to destination consuming value；
Wherein, COST is total paragraph consuming value, and cost is the consuming value of each paragraph, and Q is weight.
10. realizing the bearer network of multiple protective according to claim 9, which is characterized in that the paragraph are as follows: two websites
The distance between, cost is set according to actual needs, and Q is the paragraph number and OTN loop inner segment that core office is passed through to destination node
Fall several ratio.
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| CN107294853B (en) * | 2017-07-12 | 2020-06-30 | 国网山东省电力公司经济技术研究院 | Power communication network path optimization method |
| CN107612826B (en) * | 2017-09-28 | 2020-01-07 | 烽火通信科技股份有限公司 | Method for realizing superposition protection of PTN1:1 and OTN1+1 |
| CN109995635B (en) * | 2017-12-29 | 2021-08-20 | ***通信集团上海有限公司 | PTN networking system based on 5G carrying network |
| CN111935566B (en) * | 2020-09-17 | 2020-12-11 | 南京嘉环科技股份有限公司 | OLP channel protection switching system and switching method based on OTN redundant waves |
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