CN104796289A - Electric power SDH data service protection configuration method and data service transmission method - Google Patents
Electric power SDH data service protection configuration method and data service transmission method Download PDFInfo
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Abstract
The invention discloses an electric power SDH data service protection configuration method and a data service transmission method. The configuration method includes: determining the number of virtual circuits, which need to be configured, of a data service according to the bandwidth requirement of the data service, and assuming that the number is 2N; determining the first path and the second path, which are in different directions in a transmission looped network, of the data service according to the starting and ending stations of the data service; forming a first service channel for the virtual circuits, with the configuration number being N, of the data service according to the first path; forming a second service channel for the virtual circuits, with the configuration number being N, of the data service according to the second path; performing virtual concatenation configuration on all the virtual circuits at the starting and ending stations of the data service to obtain a virtual concatenation group; setting an LCAS function for the virtual concatenation group. The configuration method has the advantages that under the condition that the resource utilization rate of the configuration method is identical with that of a configuration method based on SNCP protection, data service bandwidth can be increased, and more possibility is provided to service upgrading.
Description
Technical field
The present invention relates to a kind of electric power SDH data service protection collocation method and data business transmission method.
Background technology
At present in power communication, SDH transmission network, owing to carrying the business such as relaying protection, even if possessed ring network structure, has not generally adopted the ring net protection method such as multiplex section protective ring, channel protection ring.
Because electric transmission network often cut-offs with electric network reconstruction, therefore carried business also should possess the condition that can provide protection when needed.The business of protection is provided for playing needs that not-go-end is transformer station and central station; usual employing SNCP (Sub-Network Connection Protection; SNCP) protected mode, for business provides two of the complete different path of transformer station from two different directions of looped network to central station standby transmission channels (master channel and protection channel) mutually.
This service protection collocation method based on SNCP can be every bar business and provides reliable independent protective, but this kind of method needs to take double transfer resource, and resource utilization is lower.
Be some data service (such as video monitoring) of transformer station and central station for playing not-go-end, certain elasticity is required for bandwidth, namely there is optimum band width configuration, there is minimum bandwidth restriction simultaneously.Best effect can be obtained under the bandwidth situation of optimum, the basic demand of business can be ensured in lowest-bandwidth situation, and the service recovery time under service channel failure condition is required it is not very strict (being generally second rank or several seconds rank).
For such data service, the problem that the resource utilization can brought based on SNCP service protection collocation method is low.
Summary of the invention
The invention provides a kind of electric power SDH data service protection collocation method and data business transmission method; it utilizes Virtual Concatenation and LCAS (Link Capacity Adjustment Scheme) technology; the problem that the resource utilization brought based on SNCP service protection collocation method is low can be solved, the availability of business can be ensured simultaneously.
To achieve these goals, the present invention adopts following technical scheme:
A kind of electric power SDH data service protection collocation method, comprises the steps:
Step (1): to a certain data service with elasticity bandwidth requirement, according to its bandwidth demand, determines that this data service needs the virtual circuit quantity of configuration, supposes that quantity is 2N;
Step (2): the initial sum according to this data service stops website, determines the path of business two different directions in transmission network looped network, is respectively the first path and the second path;
Step (3): the first path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the first service channel;
Step (4): the second path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the second service channel;
Step (5): stop website in the initial sum of data service, Virtual Concatenation configuration is carried out to whole virtual circuit, obtains virtual cascade group;
Step (6): for virtual cascade group arranges LCAS function.
The described data service with elasticity bandwidth requirement, has optimum band width configuration, has minimum bandwidth restriction simultaneously.
The described data service with elasticity bandwidth requirement can ensure that under the bandwidth situation of optimum data transmission bauds is fast, time delay is low, has high reliability and real-time.
The described data service with elasticity bandwidth requirement can ensure the most basic transfer of data under minimum bandwidth situation.
The described data service with elasticity bandwidth requirement requires comparatively loose to failure recovery time, can be rank or several seconds rank second.
A kind of electric power SDH data business transmission method, comprises following situation:
Under normal circumstances, data service is by all virtual circuit transmission data of two service channels of virtual cascade group, namely original service data allocations transmits by transmitting terminal to all virtual circuits, receiving terminal is arrived by two service channels, carry out arrangement restructuring after the data buffer storage that different virtual circuit is come by receiving terminal, recover original service data;
When some virtual circuit breaks down, because virtual cascade group is provided with LCAS function, SDH network management system automatically identifies fault and is removed from virtual cascade group by disabled virtual circuit, and now service bandwidth equals the bandwidth sum remaining virtual circuit in virtual cascade group.
After the Failure elimination of fault virtual circuit, SDH network management system automatically identifies and is again added in virtual cascade group by normal for recovery virtual circuit, and now service bandwidth is restored.
Virtual Concatenation is that the virtual container be distributed in different STM-N Frame (can same path or different path) is cascaded into VC-4/3/12-Xv form, transmits as a virtual overall structure.
LCAS is a kind of adjustment of the dynamic bandwidth based on Virtual Concatenation agreement that ITU-T proposes, and this agreement is removed automatically according to virtual cascading member state and added member, thus the link capacity of undamaged adjustment Virtual Concatenation business, realize the dynamic conditioning of service bandwidth.
The invention has the beneficial effects as follows:
1, ensureing, under the prerequisite that data service uses, to substantially increase the utilance of transfer resource;
2, in the resource utilization situation identical with based on SNCP relaying configuration method, the bandwidth of data service can be improved, thus for upgrading service provide more may;
3, Virtual Concatenation has higher flexibility than Adjacent Concatenation.In addition, different from Adjacent Concatenation, Virtual Concatenation only needs terminal equipment to support Virtual Concatenation function, to the equipment not requirement of business process.
Accompanying drawing explanation
Fig. 1 is based on SNCP relaying configuration method schematic diagram;
Fig. 2 is the relaying configuration method schematic diagram that the present invention proposes;
Fig. 3 is the relaying configuration method flow diagram that the present invention proposes.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
If the optimum bandwidth of data service is Ba, lowest-bandwidth is Bb.
As shown in Figure 1, based under SNCP relaying configuration method, the bandwidth of master channel and protection channel is B1, and data service bandwidth is also B1.In order to ensure the optimum efficiency of data service, general B1=Ba, the transfer resource at this moment taken in whole network is 2 × B1=2Ba.
As shown in Figure 2, under the relaying configuration method that the present invention proposes, service channel 1 and service channel 2 bandwidth are B2, and data service bandwidth is 2 × B2.In order to ensure the optimum efficiency of data service, ensure simultaneously due on certain direction because meet the demand of data service lowest-bandwidth when fault causes service channel obstructed, then B2 >=Bb and 2 × B2 >=Ba, i.e. B2=MAX (Bb, Ba/2).
At this moment the transfer resource taken in whole network is 2 × B2=2MAX (Bb, Ba/2)=MAX (2Bb, Ba).Due to Bb≤Ba, so 2 × B2≤2Ba.
That is, ensureing that under the prerequisite that data service uses, the relaying configuration method that the present invention proposes occupies less transfer resource.
Under special circumstances; if Bb=Ba; so under the relaying configuration method of the present invention's proposition; transfer resource 2 × B2=2Bb=2Ba=2 × the B1 taken; that is with based under SNCP relaying configuration method occupy identical transfer resource, but at this moment data service bandwidth is 2 × B2=2 × B1 under normal circumstances.That is, in the resource utilization situation identical with based on SNCP relaying configuration method, the relaying configuration method that the present invention proposes can improve the bandwidth of data service.
As shown in Figure 3, a kind of electric power SDH data service protection collocation method, comprises the steps:
Step (1): to a certain data service with elasticity bandwidth requirement, according to its bandwidth demand, calculate the virtual circuit quantity that this data service needs configuration, suppose that quantity is 2N, the virtual circuit total bandwidth that should meet quantity N is more than or equal to data service lowest-bandwidth, and the virtual circuit total bandwidth of quantity 2N is more than or equal to optimum bandwidth;
Step (2): the initial sum according to this data service stops website, determines the path of business two different directions in transmission network looped network, is respectively the first path and the second path;
Step (3): the first path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the first service channel;
Step (4): the second path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the second service channel;
Step (5): stop website in the initial sum of data service, Virtual Concatenation configuration is carried out to whole virtual circuit, obtains virtual cascade group;
Step (6): for virtual cascade group arranges LCAS function.
Under normal circumstances, data service is by all virtual circuit transmission data of virtual cascade group, namely original service data allocations transmits by transmitting terminal to all virtual circuits, receiving terminal is arrived by two service channels of different directions, carry out arrangement restructuring after the data buffer storage that different virtual circuit is come by receiving terminal, recover original service data.At this moment, data service bandwidth equals the bandwidth of two service channels.
When certain direction of transmission network causes transmission light path to be interrupted because optical cable cut-offs, at this moment data service service channel in the direction in which interrupts, and will cause comprised virtual circuit fault.Because virtual cascade group is provided with LCAS function, system automatically identifies fault and is removed from virtual cascade group by disabled virtual circuit, now only have an other service channel to use, service bandwidth reduces to original half, but still can meet the basic transmission of data service.
After optical cable reparation, light path interrupt recovery, the fault of fault virtual circuit is eliminated, and system automatically identifies and again added in virtual cascade group by normal for recovery virtual circuit, and the service channel now on former fault direction recovers available, and service bandwidth recovers normal.
Virtual Concatenation is that the virtual container be distributed in different STM-N Frame (can same path or different path) is cascaded into VC-4/3/12-Xv form, transmits as a virtual overall structure.
LCAS is a kind of adjustment of the dynamic bandwidth based on Virtual Concatenation agreement that ITU-T proposes, and this agreement is removed automatically according to virtual cascading member state and added member, thus the link capacity of undamaged adjustment Virtual Concatenation business, realize the dynamic conditioning of service bandwidth.
In SDH/MSTP system, in order to flexible networking and raising bandwidth availability ratio, usually adopt the mode of Virtual Concatenation to carry out encapsulation to data and map.The principle of concatenation technology is by multiple virtual container set altogether, keeps single container of bit sequence integrality to use, realize the transmission of services of large granularities as one.Cascade is divided into Adjacent Concatenation and Virtual Concatenation.Adjacent Concatenation is that adjacent virtual container in same STM-N Frame is cascaded into VC-4/3/12-Xc form, and integrally structure is transmitted.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (8)
1. an electric power SDH data service protection collocation method, is characterized in that, comprise the steps:
Step (1): to a certain data service with elasticity bandwidth requirement, according to its bandwidth demand, determines that this data service needs the virtual circuit quantity of configuration, supposes that quantity is 2N;
Step (2): the initial sum according to this data service stops website, determines the path of business two different directions in transmission network looped network, is respectively the first path and the second path;
Step (3): the first path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the first service channel;
Step (4): the second path determined according to step (2), the virtual circuit being N for data service configuration quantity forms the second service channel;
Step (5): stop website in the initial sum of data service, Virtual Concatenation configuration is carried out to whole virtual circuit, obtains virtual cascade group;
Step (6): for virtual cascade group arranges LCAS function.
2. a kind of electric power SDH data service protection collocation method as claimed in claim 1, is characterized in that, described in there is the data service of elasticity bandwidth requirement, there is optimum band width configuration, there is minimum bandwidth restriction simultaneously.
3. a kind of electric power SDH data service protection collocation method as claimed in claim 1; it is characterized in that; the described data service with elasticity bandwidth requirement can ensure that under the bandwidth situation of optimum data transmission bauds is fast, time delay is low, has high reliability and real-time.
4. a kind of electric power SDH data service protection collocation method as claimed in claim 1, is characterized in that, described in there is elasticity bandwidth requirement data service can ensure the most basic transfer of data under minimum bandwidth situation.
5. a kind of electric power SDH data service protection collocation method as claimed in claim 1, is characterized in that, described in there is elasticity bandwidth requirement data service loosely require to failure recovery time, be rank or several seconds rank second.
6. an electric power SDH data business transmission method, is characterized in that, comprises following situation:
Under normal circumstances, data service is by all virtual circuit transmission data of two service channels of virtual cascade group, namely original service data allocations transmits by transmitting terminal to all virtual circuits, receiving terminal is arrived by two service channels, carry out arrangement restructuring after the data buffer storage that different virtual circuit is come by receiving terminal, recover original service data;
When some virtual circuit breaks down, because virtual cascade group is provided with LCAS function, SDH network management system automatically identifies fault and is removed from virtual cascade group by disabled virtual circuit, and now service bandwidth equals the bandwidth sum remaining virtual circuit in virtual cascade group;
After the Failure elimination of fault virtual circuit, SDH network management system automatically identifies and is again added in virtual cascade group by normal for recovery virtual circuit, and now service bandwidth is restored.
7. a kind of electric power SDH data business transmission method as claimed in claim 6, is characterized in that, Virtual Concatenation is that the virtual container be distributed in different STM-N Frame is cascaded into VC-4/3/12-Xv form, transmits as a virtual overall structure.
8. a kind of electric power SDH data business transmission method as claimed in claim 6, it is characterized in that, LCAS is a kind of adjustment of the dynamic bandwidth based on Virtual Concatenation agreement that ITU-T proposes, this agreement is removed automatically according to virtual cascading member state and is added member, thus the link capacity of undamaged adjustment Virtual Concatenation business, realize the dynamic conditioning of service bandwidth.
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Inventor after: Wang Lei Inventor after: Li Xiao Inventor after: Zhang Yong Inventor after: Liu Lei Inventor after: Zhang Yantong Inventor after: Sun Ninghao Inventor after: Zhong Rui Inventor after: Fang Xiaoguo Inventor after: Li Kai Inventor after: Zhang Yan Inventor before: Wang Lei Inventor before: Li Xiao Inventor before: Sun Ninghao Inventor before: Liu Lei Inventor before: Zheng Yongwei Inventor before: Fang Xiaoguo Inventor before: Li Kai Inventor before: Xu Bintai Inventor before: Zhang Yan Inventor before: Zhong Rui |
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