CN101662704B - Method, system and node equipment for acquiring optical wavelength path - Google Patents
Method, system and node equipment for acquiring optical wavelength path Download PDFInfo
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- CN101662704B CN101662704B CN200810212676A CN200810212676A CN101662704B CN 101662704 B CN101662704 B CN 101662704B CN 200810212676 A CN200810212676 A CN 200810212676A CN 200810212676 A CN200810212676 A CN 200810212676A CN 101662704 B CN101662704 B CN 101662704B
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Abstract
The embodiment of the invention discloses a method, a system and node equipment for acquiring an optical wavelength path, belonging to the communication field. The method comprises the following steps: acquiring optical damage parameter values of a traffic engineering link in the network and optical receiving margin parameter values of nodes in the network; acquiring a first optical wavelength path by using the conventional path calculating algorithm; accumulating the optical damage parameter values of each section of the traffic engineering link on the first optical wavelength path, and acquiring a first optical damage accumulated value; comparing the first optical damage accumulated value with the optical receiving margin parameter value of the head node on the first optical wavelength path and the optical receiving margin parameter value of the end node on the first optical wavelength path; and judging whether the optical wavelength path is successfully acquired or not according to the comparative result. The technical scheme of the embodiment of the invention can quickly acquire the optical wavelength path and is favorable for improving the service performance.
Description
Technical field
The present invention relates to optical communication field, particularly a kind of method, system and node device that obtains light wavelength path.
Background technology
ASON (Automatically Switched Optical Network; ASON) through between the transmission plane of conventional optical network and management plane, introducing control plane; Thereby have automatic neighbours, automatic link and automatic topological discover function; And utilize the rerouting mechanism of control plane; Combine with protection mechanisms such as the SNCP of conventional transmission network, multiplex section protections, can provide like permanent 1+1 protection, 1+1 protection to add the business that recoverys, multiplex section protection add recoverys, share kinds of protect such as mesh network recovers, dynamic recovery, unprotect, extra traffic and recovery type flexible automaticly.
The key link that realizes above-mentioned functions is to obtain light wavelength path; Usually the method for obtaining light wavelength path is described below: ospf protocol is with traffic engineering (Traffic Engineering; TE) link attribute (node number and the interface index that comprise local and far-end, link signal type, available bandwidth; Link cost and distance etc.); (Link State Advertisement LSA) wraps in and carries out inundation in the whole network, and each network element all obtains the link and the topology information of whole network like this through the flow engineering link state publications.When carrying out operation such as professional foundation, heavy-route, optimization; Professional first node utilizes constraint shortest path first (Constrained Shortest Path First; CSPF) agreement adopts shortest path first to come the light wavelength path of computing service according to network topological information and service traffics parameter information.
At present; The method of obtaining light wavelength path is applicable to the optical-fiber network based on the exchange of electricity layer; But for having used ROADM (Reconfigurable Optical Add/Drop Multiplexer; ROADM) wavelength switched optical network; Because on the node of light path process, do not pass through the conversion of photoelectricity light, wavelength is a transparent transmission, so just cause the various light injury effects (comprising spontaneous emission noise, chromatic dispersion etc.) can accumulation and finally influence the service signal quality of receiving terminal.At this moment, the light wavelength path that existing route algorithmic technique adopts conventional shortest path computational methods to calculate possibly be actually disabled.At this moment, obtain the urgent problem that becomes of the light wavelength path that receives optical damage constraint.
In order to obtain the light wavelength path that receives the optical damage constraint, prior art provides the centralized path algorithm, and this algorithm is common in system's first stage of construction network optimization, and is specific as follows:
Existing centralized path algorithm, network management device (Network Management System, NMS) or path-calculating element (Path Computation Element PCE) obtains various optical damage parameters; When network management device or path-calculating element receive the path computing request that the request network element sends; Carry out complicated global optimization approach through the centralized path method and calculate the optimum light wavelength path that satisfies the optical damage restriction on the parameters, and the path computing result is returned to the request network element.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
Though existing route algorithmic technique can be calculated light wavelength path available and that optimize; But there are propagation delay time in path computing request and response; And the computing time of global optimization routing algorithm is also longer, and this can cause obtaining the overlong time of light wavelength path, thereby influences service feature.
Summary of the invention
For fear of the influence of the overlong time of obtaining light wavelength path to business, the embodiment of the invention provides a kind of method, system and node device that obtains light wavelength path, and said technical scheme is following:
A kind of method of obtaining light wavelength path comprises:
Obtain path computing request, obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization;
Obtain the optics receiving margin parameter value of node in optical damage parameter value and the said network of flow engineering link in the network;
The optical damage parameter value of each section flow engineering link on said first light wavelength path is added up, obtain the first optical damage accumulated value;
The optics receiving margin parameter value of end-node on the optics receiving margin parameter value of the first node of the said first optical damage accumulated value and said first light wavelength path and said first light wavelength path is compared;
The optics receiving margin parameter value that is less than or equal to the first node of said first light wavelength path when the said first optical damage accumulated value; And when being less than or equal to the optics receiving margin parameter value of the end-node on said first light wavelength path, judge that said first light wavelength path can use.
A kind of node device comprises: Link Resource Manager module and path calculation module;
Said Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the said network of network flow engineering link;
Said path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
A kind of system that obtains light wavelength path comprises the node device that is connected with network management device;
Said node device comprises: Link Resource Manager module and path calculation module;
Said Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the said network of network flow engineering link;
Said path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
The optics receiving margin parameter value of the embodiment of the invention through obtaining node in the network and the optical damage parameter value of each section optical fiber flow engineering link when needs calculate light wavelength path, utilize conventional path computation algorithm to obtain light wavelength path; And the optical damage parameter value of the light wavelength path that obtains and the first node of light wavelength path and the optics receiving margin parameter value of end-node compared; And judge according to the result whether light wavelength path is available, thus the propagation delay time of path request/response in the prior art can be avoided, simultaneously; Owing to adopt simple path computation algorithm; Can reduce the system handles time, thereby help obtaining fast the light wavelength path that satisfies the optical damage constraint, can reduce the transmission delay of path request and response; Help to obtain fast light wavelength path, improve service feature.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is one embodiment of the present of invention.
Fig. 1 is the flow chart of the method for obtaining light wavelength path that provides of the embodiment of the invention 1;
Fig. 2 is the detail flowchart of the method for obtaining light wavelength path that provides of the embodiment of the invention 1;
Fig. 3 is the detail flowchart of the method for obtaining light wavelength path of the another kind of node that provides of the embodiment of the invention 2;
Fig. 4 is the structure chart of a kind of node device of providing of the embodiment of the invention 3;
Fig. 5 is the structure chart of the another kind of node device that provides of the embodiment of the invention 3;
Fig. 6 is the structure chart of the another kind of node device that provides of the embodiment of the invention 3;
Fig. 7 is the composition structure chart of the system that obtains light wavelength path that provides of the embodiment of the invention 4.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment 1
The embodiment of the invention provides a kind of method of obtaining light wavelength path, and is as shown in Figure 1, comprising:
101: the optics receiving margin parameter value that obtains node in optical damage parameter value and the network of flow engineering link in the network;
102: obtain path computing request, obtain first light wavelength path according to the conventional path computation algorithm of path computing request utilization;
103: the optical damage parameter value of each section flow engineering link on first light wavelength path is added up, obtain the first optical damage accumulated value;
104: the optics receiving margin parameter value of end-node on the optics receiving margin parameter value of the first node of the first optical damage accumulated value and said first light wavelength path and first light wavelength path is compared;
105: when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of the first node of first light wavelength path, and when being less than or equal to the optics receiving margin parameter value of the end-node on first light wavelength path, judge that first light wavelength path can use.
Method below in conjunction with to present embodiment is carried out detailed description, and is as shown in Figure 2, and this method of obtaining light wavelength path comprises:
201: (Network Management Interface NMI) is configured to the optical parameter value of each section optical fiber flow engineering link in the network local node and the neighbor node at optical fiber two ends to network management device through network management interface.
Wherein, The optical parameter value of optical fiber flow engineering link comprises: fiber distance D, chromatic dispersion coefficient (Chromatic Dispersion Factor; CDF), polarization mode dispersion coefficient (Polarization Mode Dispersion Factor, parameter such as PMDF).
202: local node utilizes the noise of optical amplifier coefficient NF of the image intensifer on self each section optical fiber flow engineering link of storage; Device parameters values such as image intensifer input power PIN, light amplifier gain G; And the optical parameter value of each section optical fiber flow engineering link that obtains from network management device calculates OSNR (the Optical Signal Noise Ratio of each section optical fiber flow engineering link; OSNR), chromatic dispersion (Chromatic Dispersion; CD), polarizing coating chromatic dispersion (Polarization Mode Dispersion; PMD) (Differential Group Delay DGD) waits the optical damage parameter value to the differential group delay that causes.
Wherein, the formula of the optical damage parameter value of calculating optical fiber flow engineering link i (i is the unique number of every optical fiber flow engineering link in the network) can be:
OSNR
i＝58+PIN
i+G
i； (1)；
CD
i＝CDF
i*D
i； (2)；
DGD
i＝PMDF
i*D
i 1/2； (3)；
203: local node is with the optics receiving margin parameter value of self; And the optical damage parameter value of acquisition optical fiber flow engineering link i is updated in the self database in 202, and optical damage parameter value and the optics receiving margin parameter value of optical fiber flow engineering link i is flooded in the whole network through TE LSA bag.
Concrete, two new Sub-TLV of expansion among the Link TLV of TE LSA protocol package, wherein, a Sub-TLV comprises: optical fiber flow engineering link i optical damage parameter value, another Sub-TLV comprises: the optics receiving margin parameter value of node.Certainly, also can be that a Sub-TLV comprises simultaneously: the optics receiving margin parameter value of optical fiber flow engineering link i optical damage parameter value and node, optional Sub-TLV form such as table 1:
Table 1
Wherein, R, C, P are respectively OSNR, CD and PMD mark, and when the bit value of optical parametric mark was 1, there was corresponding optical parameter value expression back, and every kind of optical damage parameter value or optics receiving margin parameter value are represented with the floating number of 32 bits.
Owing to can carry out the optical damage parameter value of each section optical fiber flow engineering link i and the inundation of node optics receiving margin parameter value between the node of network; Therefore, node is known the optical damage parameter value of each section optical fiber flow engineering link i in the network and the optics receiving margin parameter value of other nodes in the network.
204: break down when needing heavy-route to carry out the path when local node receives the path request of network management system or detects in the network node; The conventional footpath of local node utilization computational algorithm obtains first light wavelength path from the local node to the neighbor node; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and local node and neighbor node (i.e. the end-node of first light wavelength path) compared respectively; When the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of local node and neighbor node, judge that obtaining light wavelength path can use; When the first optical damage accumulated value during, judge that to obtain light wavelength path unavailable greater than the optics receiving margin parameter value of local node or neighbor node.
Wherein, conventional path computation algorithm comprises: shortest path first, minimum cost algorithm or load-balancing algorithm etc. for not considering the path computation algorithm of optical damage.
Local node calculates the first optical damage accumulated value of light wavelength path can use following formula:
OSNR
P＝-10log(∑10
-OSNRi/10) (4)；
CD
P＝∑CD
i (5)；
DGD
P＝(∑DGD
i 2)
1/2 (6)；
The optics receiving margin parameter value of the embodiment of the invention through obtaining node in the network and the optical damage parameter value of each section optical fiber flow engineering link when needs calculate light wavelength path, utilize conventional path computation algorithm to obtain light wavelength path; And the optical damage parameter value of the light wavelength path that obtains and the first node of light wavelength path and the optics receiving margin parameter value of end-node compared; And judge according to the result whether light wavelength path is available, thus the propagation delay time of path request/response in the prior art can be avoided, simultaneously; Owing to adopt simple path computation algorithm; Can reduce the system handles time, thereby help obtaining fast the light wavelength path that satisfies the optical damage constraint, can reduce the transmission delay of path request and response; Help to obtain fast light wavelength path, improve service feature.
Embodiment 2
The embodiment of the invention provides a kind of method of obtaining light wavelength path, and is as shown in Figure 3, comprising:
301-304 is identical with 201-204 among the embodiment 1, repeats no more.
305: local node is judged and to be obtained light wavelength path when unavailable; The cost weights of flow engineering link are set to the optical damage parameter value of flow engineering link; Utilize minimum optical damage bounding algorithm to obtain second light wavelength path; Said minimum optical damage bounding algorithm is: the optical damage binding occurrence of each section flow engineering link on the path in the network is added up respectively according to the formula in 304 obtains the optical damage accumulated value; Second light wavelength path of path that selective optical damage accumulated value is minimum for obtaining; The optical damage accumulated value of said second light wavelength path is the second optical damage accumulated value; Compare respectively during with the optics receiving margin parameter value of the second optical damage accumulated value and local node and neighbor node, when the second optical damage accumulated value is less than or equal to the optics receiving margin parameter value of local node and neighbor node, judge that the light wavelength path that obtains can use; When the second optical damage accumulated value was less than or equal to the optics receiving margin parameter value of local node or neighbor node, it is unavailable that light wavelength path is obtained in judgement.
The optics receiving margin parameter value of the embodiment of the invention through obtaining node in the network and the optical damage parameter value of each section optical fiber flow engineering link when needs calculate light wavelength path, utilize conventional path computation algorithm to obtain light wavelength path; And the optical damage parameter value of the light wavelength path that obtains and the first node of light wavelength path and the optics receiving margin parameter value of end-node compared; And judge according to the result whether light wavelength path is available, thus the propagation delay time of path request/response in the prior art can be avoided, simultaneously; Owing to adopt simple path computation algorithm; Can reduce the system handles time, thereby help obtaining fast the light wavelength path that satisfies the optical damage constraint, can reduce the transmission delay of path request and response; Help to obtain fast light wavelength path, improve service feature.
Further; When the light wavelength path that utilizes conventional path computation algorithm to obtain is failed; Then obtain light wavelength path, and judge that whether obtain light wavelength path satisfies pre-conditionedly, equally also can reach the effect that improves service feature through minimum optical damage bounding algorithm.
Embodiment 3
The embodiment of the invention provides a kind of node device, and is as shown in Figure 4, Link Resource Manager module and path calculation module;
The Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the network of network flow engineering link;
Path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
Wherein, the Link Resource Manager module comprises:
The parameter receiving element is used for obtaining the optical parameter value of network flow engineering link and the device parameters value of image intensifer;
Computing unit is used for calculating according to the device parameters value of the optical parameter value of network flow engineering link and image intensifer the optical damage parameter value of flow engineering link in the network.
Further, as shown in Figure 5, this node device also comprises:
The traffic engineering administration module is used for the generation pass computation requests, and path computing request is sent to said path calculation module.
Further, as shown in Figure 6, this node device also comprises:
Transmit flat unit, be used for obtaining the device parameters value of the image intensifer of network flow engineering link, and the device parameters value of transmission image intensifer is given said parameter receiving element.
Further, this node device also comprises:
The inundation module is used for the optical damage parameter value of flow engineering link and the optics receiving margin parameter value of node are carried out inundation at network.Concrete; The inundation module is expanded two new Sub-TLV in the Link TLV of TE LSA protocol package; Wherein, a Sub-TLV comprises: optical fiber flow engineering link i optical damage parameter value, another Sub-TLV comprises: the optics receiving margin parameter value of node.Certainly, also can be that a Sub-TLV comprises simultaneously: the optics receiving margin parameter value of optical fiber flow engineering link i optical damage parameter value and node.
Further, this path calculation module also is used for:
When the optics receiving margin parameter value of the first optical damage accumulated value, and/or during greater than the optics receiving margin parameter value of the first light wavelength path end-node, judge that first light wavelength path that obtains is unavailable greater than the first node of said first light wavelength path.
Further, this path calculation module also is used for:
Obtain first light wavelength path when unavailable when judgement, the cost weights of flow engineering link are set to the optical damage parameter value of flow engineering link, calculate the second minimum light wavelength path of optical damage accumulated value; The optical damage accumulated value of second light wavelength path obtains through the optical damage parameter value of each section flow engineering link on this second light wavelength path is added up;
The optics receiving margin parameter value of end-node on the optics receiving margin parameter value of first node on the optical damage accumulated value of second light wavelength path and second light wavelength path and second light wavelength path is compared;
The optics receiving margin parameter value that is less than or equal to first node on said second light wavelength path when the second optical damage accumulated value; And when being less than or equal to the optics receiving margin parameter value of the end-node on said second light wavelength path, second light wavelength path that judgement is obtained can be used.
Node device in the embodiment of the invention can be embodiment 1 with embodiment 2 in local node, can repeat no more at this referring to embodiment 1 and embodiment 2 about the practical implementation process of node device.
The optics receiving margin parameter value of the embodiment of the invention through obtaining node in the network and the optical damage parameter value of each section optical fiber flow engineering link when needs calculate light wavelength path, utilize conventional path computation algorithm to obtain light wavelength path; And the optical damage parameter value of the light wavelength path that obtains and the first node of light wavelength path and the optics receiving margin parameter value of end-node compared; And judge according to the result whether light wavelength path is available, thus the propagation delay time of path request/response in the prior art can be avoided, simultaneously; Owing to adopt simple path computation algorithm; Can reduce the system handles time, thereby help obtaining fast the light wavelength path that satisfies the optical damage constraint, can reduce the transmission delay of path request and response; Help to obtain fast light wavelength path, improve service feature.
Further; When the light wavelength path that utilizes conventional path computation algorithm to obtain is failed; Then obtain light wavelength path, and judge that whether obtain light wavelength path satisfies pre-conditionedly, equally also can reach the effect that improves service feature through minimum optical damage bounding algorithm.
Embodiment 4
The embodiment of the invention provides a kind of system that obtains light wavelength path, and is as shown in Figure 7, comprising: the node device that is connected with network management device;
This node device comprises: Link Resource Manager module and path calculation module;
Said Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the said network of network flow engineering link;
Said path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
Node device in the embodiment of the invention can be embodiment 1 with embodiment 2 in local node, can repeat no more at this referring to embodiment 1 and embodiment 2 about the practical implementation process of node device.
The optics receiving margin parameter value of the embodiment of the invention through obtaining node in the network and the optical damage parameter value of each section optical fiber flow engineering link when needs calculate light wavelength path, utilize conventional path computation algorithm to obtain light wavelength path; And the optical damage parameter value of the light wavelength path that obtains and the first node of light wavelength path and the optics receiving margin parameter value of end-node compared; And judge according to the result whether light wavelength path is available, thus the propagation delay time of path request/response in the prior art can be avoided, simultaneously; Owing to adopt simple path computation algorithm; Can reduce the system handles time, thereby help obtaining fast the light wavelength path that satisfies the optical damage constraint, can reduce the transmission delay of path request and response; Help to obtain fast light wavelength path, improve service feature.
Further; When the light wavelength path that utilizes conventional path computation algorithm to obtain is failed; Then obtain light wavelength path, and judge that whether obtain light wavelength path satisfies pre-conditionedly, equally also can reach the effect that improves service feature through minimum optical damage bounding algorithm.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Said program can be stored in the computer read/write memory medium, and said storage medium is floppy disk, hard disk or the CD etc. of computer.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a method of obtaining light wavelength path is characterized in that, comprising:
Obtain the optics receiving margin parameter value of node in optical damage parameter value and the said network of flow engineering link in the network;
Obtain path computing request, obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization;
The optical damage parameter value of each section flow engineering link on said first light wavelength path is added up, obtain the first optical damage accumulated value;
The optics receiving margin parameter value of end-node on the optics receiving margin parameter value of the first node of the said first optical damage accumulated value and said first light wavelength path and said first light wavelength path is compared;
The optics receiving margin parameter value that is less than or equal to the first node of said first light wavelength path when the said first optical damage accumulated value; And when being less than or equal to the optics receiving margin parameter value of the end-node on said first light wavelength path, judge that said first light wavelength path can use.
2. the method for obtaining light wavelength path as claimed in claim 1 is characterized in that, said conventional path calculation method comprises a kind of in the following algorithm: shortest path first, minimum cost algorithm and load-balancing algorithm.
3. according to claim 1 or claim 2 the method for obtaining light wavelength path is characterized in that the said optical damage parameter value that obtains flow engineering link in the network comprises:
Obtain the optical parameter value of flow engineering link in the said network and the device parameters value of image intensifer, calculate the optical damage parameter value of flow engineering link in the said network according to the device parameters value of said optical parameter value and said image intensifer.
4. according to claim 1 or claim 2 the method for obtaining light wavelength path is characterized in that, also comprises behind said optical damage parameter value that obtains flow engineering link in the network and the node optics receiving margin parameter value:
With the optical damage parameter value of said flow engineering link and optics receiving margin parameter value inundation in network of said node.
5. according to claim 1 or claim 2 the method for obtaining light wavelength path is characterized in that, also comprises:
When the optics receiving margin parameter value of the said first optical damage accumulated value greater than the first node of said first light wavelength path; And/or during greater than the optics receiving margin parameter value of the said first light wavelength path end-node, judge that said first light wavelength path that obtains is unavailable.
6. the method for obtaining light wavelength path as claimed in claim 5 is characterized in that, also comprises:
Obtain first light wavelength path when unavailable when judgement, the cost weights of flow engineering link are set to the optical damage parameter value of flow engineering link, calculate the second minimum light wavelength path of optical damage accumulated value; The optical damage accumulated value of said second light wavelength path obtains through the optical damage parameter value of each section flow engineering link on this second light wavelength path is added up;
The optics receiving margin parameter value of end-node on the optics receiving margin parameter value of first node on the optical damage accumulated value of said second light wavelength path and said second light wavelength path and said second light wavelength path is compared;
The optics receiving margin parameter value that is less than or equal to first node on said second light wavelength path when the said second optical damage accumulated value; And when being less than or equal to the optics receiving margin parameter value of the end-node on said second light wavelength path, said second light wavelength path that judgement is obtained can be used.
7. the method for obtaining light wavelength path as claimed in claim 6 is characterized in that, also comprises:
When the said second optical damage accumulated value greater than said second light wavelength path on first node optics receiving margin parameter value; And/or during greater than the optics receiving margin parameter value of the said second light wavelength path end-node, judge that said second light wavelength path that obtains is unavailable.
8. a node device is characterized in that, comprising: Link Resource Manager module and path calculation module;
Said Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the said network of network flow engineering link;
Said path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
9. node device as claimed in claim 8 is characterized in that, also comprises:
The traffic engineering administration module is used for the generation pass computation requests, and path computing request is sent to said path calculation module.
10. like claim 8 or 9 described node devices, it is characterized in that said Link Resource Manager module comprises:
The parameter receiving element is used for obtaining the optical parameter value of said network flow engineering link and the device parameters value of image intensifer;
Computing unit is used for calculating according to the device parameters value of the optical parameter value of said network flow engineering link and image intensifer the optical damage parameter value of flow engineering link in the said network.
11. node device as claimed in claim 10 is characterized in that, also comprises:
Transmit flat unit, be used for obtaining the device parameters value of the image intensifer of network flow engineering link, and the device parameters value of transmitting said image intensifer is given said parameter receiving element.
12. node device as claimed in claim 8 is characterized in that, also comprises:
The inundation module is used for the optical damage parameter value of said flow engineering link and the optics receiving margin parameter value of node are carried out inundation at network.
13., it is characterized in that said path calculation module also is used for like claim 8 or 12 described node devices:
When the optics receiving margin parameter value of the said first optical damage accumulated value greater than the first node of said first light wavelength path; And/or during greater than the optics receiving margin parameter value of the said first light wavelength path end-node, judge that said first light wavelength path that obtains is unavailable.
14. node device as claimed in claim 13 is characterized in that:
Said path calculation module also is used for obtaining first light wavelength path when unavailable when judging, the cost weights of flow engineering link are set to the optical damage parameter value of flow engineering link, calculate the second minimum light wavelength path of optical damage accumulated value; The optical damage accumulated value of said second light wavelength path obtains through the optical damage parameter value of each section flow engineering link on this second light wavelength path is added up;
The optics receiving margin parameter value of end-node on the optics receiving margin parameter value of first node on the optical damage accumulated value of said second light wavelength path and said second light wavelength path and said second light wavelength path is compared;
The optics receiving margin parameter value that is less than or equal to first node on said second light wavelength path when the said second optical damage accumulated value; And when being less than or equal to the optics receiving margin parameter value of the end-node on said second light wavelength path, said second light wavelength path that judgement is obtained can be used.
15. a system that obtains light wavelength path is characterized in that, comprises the node device that is connected with network management device;
Said node device comprises: Link Resource Manager module and path calculation module;
Said Link Resource Manager module is used for obtaining the optics receiving margin parameter value of node in optical damage parameter value and the said network of network flow engineering link;
Said path calculation module; Be used for the RX path computation requests; Obtain first light wavelength path according to the conventional path computation algorithm of said path computing request utilization from this node device to destination node equipment; The optical damage parameter value of every section flow engineering link of the first light wavelength path process is added up respectively; Obtain the first optical damage accumulated value of first light wavelength path; And the optics receiving margin parameter value of the first optical damage accumulated value and this node device and destination node equipment compared, when the first optical damage accumulated value is less than or equal to the optics receiving margin parameter value of this node device and destination node equipment, judge that obtaining first light wavelength path can use.
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| CN200810212676A CN101662704B (en) | 2008-08-26 | 2008-08-26 | Method, system and node equipment for acquiring optical wavelength path |
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| CN200810212676A CN101662704B (en) | 2008-08-26 | 2008-08-26 | Method, system and node equipment for acquiring optical wavelength path |
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| CN102238060B (en) * | 2010-04-21 | 2014-03-05 | 华为技术有限公司 | Routing method and apparatus thereof |
| CN102158300B (en) * | 2010-12-31 | 2013-10-09 | 华为技术有限公司 | Method for establishing path in wavelength division network, communication node and communication system |
| CN102752185B (en) * | 2011-04-20 | 2016-09-14 | 中兴通讯股份有限公司 | A kind of method and system determining routed path |
| EP2706708B1 (en) | 2011-05-24 | 2015-09-16 | Huawei Technologies Co., Ltd. | Method and apparatus for path selection |
| WO2012163015A1 (en) * | 2011-10-20 | 2012-12-06 | 华为技术有限公司 | Method and device for path calculation |
| CN103581006A (en) * | 2012-08-10 | 2014-02-12 | 北京邮电大学 | System architecture for global optimization of flexible grid optical networks and global optimization method thereof |
| CN105634954B (en) * | 2016-01-08 | 2019-04-16 | 烽火通信科技股份有限公司 | The shortest path calculation method of light injury is considered based on WSON network |
| CN105915558B (en) * | 2016-06-30 | 2019-06-04 | 瑞斯康达科技发展股份有限公司 | A kind of the passive optical network communication means and system of ONU mixed insertion |
| CN113364519B (en) * | 2021-06-09 | 2023-02-24 | 聊城大学 | Optical performance monitoring method and device, electronic equipment and storage medium |
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| CN1716824A (en) * | 2004-06-14 | 2006-01-04 | 电子科技大学 | Method for resoving light burst resource conflict |
| CN101106523A (en) * | 2007-08-03 | 2008-01-16 | 重庆邮电大学 | A buffering structure for sectioned share optical loop switching network |
| CN101212818A (en) * | 2006-12-26 | 2008-07-02 | 华为技术有限公司 | Network node and buffer device, and scheduling method |
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| CN1716824A (en) * | 2004-06-14 | 2006-01-04 | 电子科技大学 | Method for resoving light burst resource conflict |
| CN101212818A (en) * | 2006-12-26 | 2008-07-02 | 华为技术有限公司 | Network node and buffer device, and scheduling method |
| CN101106523A (en) * | 2007-08-03 | 2008-01-16 | 重庆邮电大学 | A buffering structure for sectioned share optical loop switching network |
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