CN103166796B - Method for realizing consistency of service signal transceiving paths during service recovery of power communication network - Google Patents
Method for realizing consistency of service signal transceiving paths during service recovery of power communication network Download PDFInfo
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- CN103166796B CN103166796B CN201310079919.XA CN201310079919A CN103166796B CN 103166796 B CN103166796 B CN 103166796B CN 201310079919 A CN201310079919 A CN 201310079919A CN 103166796 B CN103166796 B CN 103166796B
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Abstract
The invention discloses a method for realizing the consistency of service signal transceiving paths during service recovery of a power communication network. The method comprises the following steps of: when a service fails in the network, informing a source node of performing dynamic recovery by a fault node; deleting local crossover, starting a delay timer and informing an intermediate node of deleting the local crossover by the source node; deleting the local crossover and informing a host node of deleting the local crossover by the intermediate node; detecting the local crossover and sequentially informing the intermediate node and the source node that the local crossover is completely deleted by the host node; and when the delay timer of the source node expires, starting the dynamic recovery flow of the fault service to recover the rerouting service of the fault. The method is applied in the power communication network; the signal transceiving paths are consistent during service recovery in a mode of delete before reroute, so that the problem of mal-operation of a relay protection device in a power system is effectively solved, and the stability of the network is improved; and the method can be applied in a power automatically switched optical network, and has a potential for generating great economic benefits.
Description
Technical field
The present invention relates to ASON, the consistent implementation method in service signal transmitting-receiving path while being specifically related to the recovery of power telecom network service dynamic.
Background technology
In order to adapt to the requirement of current network high-speed development, the business intelligence scheduling of communication network is extremely important, so ASON (ASON, Automatically Switched Optical Network) arises at the historic moment.ASON can be based on SDH(Synchronous Digital Hierarchy) or OTN(Optical Transport Network) transmit network and realize; provide different grade of service business automatically, the effective function such as protection recovery fast of dynamic optimization, the business of configuration, Internet resources flexibly; improve ease for maintenance and the extensibility of network, effectively resist repeatedly fault of network multiple spot.Existing electric power system, service signal (as: alarm signal, circuit breaker break-make control signal or business recovery signal) adopts the power telecom network of being set up by ASON to transmit conventionally.
As everyone knows; in electric power system, be generally all provided with protective relaying device (Relay Protection Equipment); when fault has occurred for the force device in electric power system (as generator, circuit etc.) or electric power system itself; may jeopardize safe operation of power system time; protective relaying device can send alarm signal to operator in time by power telecom network; or directly send the service signals such as trip signal to controlled circuit breaker, thereby avoid resulting in greater loss.When protective relaying device work; can constantly carry out sampling processing to the service signal in power telecom network; and calculate the transmission time delay difference between sending and receiving signal; if the transmission time delay difference of sending and receiving signal exceedes the threshold value of setting; will there is malfunction in protective relaying device, causes large area blackout.The propagation delay time of service signal is affected by the factor of two aspects mainly: one is transmission range, and transmission range is longer, and time delay is larger; Another is the device node number of process in transmitting procedure, and the device node number of process is more, and time delay is larger.
This shows, in power telecom network, in the time that communication failure occurs, unimpeded in order to recover the communication of network, avoid again the generation of power outage, just require the sending and receiving signal transmission time delay difference of the service signal in communication network to be less than the threshold value of setting.
At present, power telecom network generally adopts control plane technology, use the mode of dynamically recovering to recover communication service, the common practice is that adopt business is first built afterwards deleted (Reroute Before Delete), to realize within the shortest time the business recovery breaking down.But; the mode of this dynamic recovery may face the risk that causes protective relaying device malfunction; reason is: control plane is a distributed system; article one, the foundation of business need to arrange by signaling harmonizing route and label selection from the multiple control plane nodes of source to destination; in the situation that not considering transmission delay, a business of dynamically recovering is from fault to the time that returns to the about 100ms of fast needs.Therefore,, for one direction fault, business is in a kind of one direction in the time of this 100ms signal; the state of other direction no signal; the transmitting-receiving path difference of business, thus cause the delay inequality of sending and receiving signal very likely to exceed the threshold value of setting, cause the malfunction of protective relaying device.
Summary of the invention
Technical problem to be solved by this invention is: avoid in power telecom network, cause protective relaying device malfunction, and then cause the problem of large area blackout because service signal transmitting-receiving path difference causes the transmission time delay difference of service signal to exceed threshold value.
In order to solve the problems of the technologies described above; the consistent implementation method in service signal transmitting-receiving path when the technical solution adopted in the present invention is to provide a kind of power telecom network business recovery; in the time that business occurs dynamically to recover; adopt the mode of building (Delete Before Reroute) of first deleting afterwards; first the transmitting-receiving of fault business is intersected and deleted; make business all there is no signal on transmitting-receiving path; and then the recovery flow process of initiation fault business; the receiving and transmitting signal of recovery business, to increase the malfunction of avoiding protective relaying device recovery time.
The object of the present invention is achieved like this:
The consistent implementation method in service signal transmitting-receiving path when power telecom network business recovery, described method step is as follows:
When in a, network, business breaks down, malfunctioning node dynamically recovers by the Notify message informing source node in signaling;
After b, source node receive that type is the Notify message of fault, delete the local back off timer that intersects and start dynamic recovery, source node is deleted local intersection by the Path message informing intermediate node in signaling;
C, intermediate node receive after the Path message that source node sends, and deletes local the intersection also to send Path message informing destination node to destination node and delete local the intersection;
D, destination node receive after the Path message that intermediate node sends, delete local intersect and by the Resv message in signaling notify successively intermediate node and source node local intersect delete complete;
E, in the time that the back off timer of source node overflows, start the dynamic recovery of fault business, recover the reroute service of fault.
The consistent implementation method in service signal transmitting-receiving path when above-mentioned power telecom network business recovery, if the type of service of the reroute service described in e step is:
Not recoverable dynamic heavy-route,, in the time that the back off timer of source node overflows, initiates the dynamically business Establishing process of recovery, and after business has been set up, the channel information of deleting faulty channel LSP also discharges the time interval resource that faulty channel LSP uses;
Recoverable dynamic heavy-route,, in the time that the back off timer of source node overflows, initiates the dynamically business Establishing process of recovery, after business has been set up, does not delete the channel information of faulty channel LSP, does not discharge the time interval resource that faulty channel LSP uses.
The consistent implementation method in service signal transmitting-receiving path when above-mentioned power telecom network business recovery, the type of service of described reroute service is recoverable dynamic heavy-route, step b is, after source node receives that type is the Notify message of recovering, start and return to timer immediately, in the time returning to timer and overflow, start resource inspection, first carry out the local resource inspection of source node, send Path message informing intermediate node; Intermediate node is received after the Path message that source node sends, and carries out the local resource inspection of intermediate node, sends Path message informing destination node; Destination node is received after the Path message that intermediate node sends, and carries out the local resource inspection of destination node, sends Notify message informing source node resource inspection success; Source node is received after the resource inspection success Notify message that destination node sends, deletion this locality intersects and starts returns to back off timer, source node is first deleted the intersection of this node, then deletes local the intersection by the Path message informing intermediate node of signaling, until destination node is deleted local the intersection; When returning to back off timer and overflowing, start Returning process.
The consistent implementation method in service signal transmitting-receiving path when power telecom network business recovery provided by the invention, because of adopt first delete the mode of building afterwards while making business recovery signal transmitting and receiving path consistent, effectively avoid the malfunction problem of protective relaying device in electric power system, improve the stability of network; The method can will be applied in electric power ASON simultaneously, and have the potentiality of the economic benefit that generation is larger.
Brief description of the drawings
Fig. 1 is the dynamic recovery flow chart of business in the present invention.
Fig. 2 is the Returning process figure that returns to type business in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1 and Fig. 2 have described respectively in method provided by the invention, dynamically recover flow process and the Returning process that returns to type business, have adopted the mode of building afterwards of first deleting.Two following specific embodiments describe as an example of the Failure And Recovery of intermediate node example respectively.
Embodiment mono-:
Figure 1 shows that in method provided by the invention the dynamic recovery flow chart of business, the sequencing of corresponding time of arrow direction from high to low in this flow chart.
A, intermediate node are received after failure message, dynamically recover by the Notify message informing source node in signaling;
B, source node receive after the Notify message that intermediate node sends, and deletes locally intersects and starts the back off timer dynamically recovering, and source node is deleted this locality intersection by the Path message informing intermediate node in signaling;
C, intermediate node receive after the Path message that source node sends, and deletes local the intersection also to send Path message informing destination node to destination node and delete local the intersection;
D, destination node receive after the Path message that intermediate node sends, delete local intersect and by the Resv message in signaling notify successively intermediate node and source node local intersect delete complete;
E, in the time that the back off timer of source node overflows, start the dynamic recovery of fault business, recover the reroute service of fault.
Embodiment bis-:
Figure 2 shows that the Returning process figure that returns to type business, the sequencing of corresponding time of arrow direction from high to low in this flow chart.
A, intermediate node are received after the message of former fault disappearance, are started business Returning process by the Notify message informing source node in signaling;
B, source node are received after the Notify message that intermediate node sends, and start and return to timer immediately, in the time returning to timer and overflow, start resource inspection, first carry out the local resource inspection of source node, and resource inspection success, sends Path message informing intermediate node; Intermediate node is received after the Path message that source node sends, and carries out the local resource inspection of intermediate node, and resource inspection success sends Path message informing destination node; Destination node is received after the Path message that intermediate node sends, and carries out the local resource inspection of destination node, and resource inspection success sends Notify message informing source node resource inspection success; Source node receives after the resource inspection success Notify message that destination node sends, delete local intersects and starts returns to back off timer, source node is first deleted the intersection of this node, then deletes this locality intersection by the Path message informing intermediate node of signaling;
C, intermediate node receive after the Path message that source node sends, and deletes local the intersection also to send Path message informing destination node to destination node and delete local the intersection;
D, destination node receive after the Path message that intermediate node sends, delete local intersect and by the Resv message in signaling notify successively intermediate node and source node local intersect delete complete;
E, in the time of the returning to back off timer and overflow of source node, continue the Returning process of execution business, the transmitting-receiving path of the reroute service that fault is disappeared turns back on original path.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (2)
1. the consistent implementation method in service signal transmitting-receiving path when power telecom network business recovery, is characterized in that, described method step is as follows:
When in a, network, business breaks down, malfunctioning node dynamically recovers by the Notify message informing source node in signaling;
After b, source node receive that type is the Notify message of fault, delete the local back off timer that intersects and start dynamic recovery, source node is deleted local intersection by the Path message informing intermediate node in signaling;
C, intermediate node receive after the Path message that source node sends, and deletes local the intersection also to send Path message informing destination node to destination node and delete local the intersection;
D, destination node receive after the Path message that intermediate node sends, delete local intersect and by the Resv message in signaling notify successively intermediate node and source node local intersect delete complete;
E, in the time of the returning to back off timer and overflow of source node, start the dynamic recovery of fault business, recover the reroute service of fault, if the type of service of the described reroute service of e step is:
Not recoverable dynamic heavy-route,, in the time that the back off timer of source node overflows, initiates the dynamically business Establishing process of recovery, and after business has been set up, the channel information of deleting faulty channel LSP also discharges the time interval resource that faulty channel LSP uses;
Recoverable dynamic heavy-route,, in the time that the back off timer of source node overflows, initiates the dynamically business Establishing process of recovery, after business has been set up, does not delete the channel information of faulty channel LSP, does not discharge the time interval resource that faulty channel LSP uses.
2. the consistent implementation method in service signal transmitting-receiving path when power telecom network business recovery according to claim 1, it is characterized in that, the type of service of described reroute service is recoverable dynamic heavy-route, step b is that source node starts and returns to timer immediately after receiving that type is the Notify message of recovering, in the time returning to timer and overflow, start resource inspection, first carry out the local resource inspection of source node, send Path message informing intermediate node; Intermediate node is received after the Path message that source node sends, and carries out the local resource inspection of intermediate node, sends Path message informing destination node; Destination node is received after the Path message that intermediate node sends, and carries out the local resource inspection of destination node, sends Notify message informing source node resource inspection success; Source node is received after the successful Notify message of resource inspection that destination node sends, deletion this locality intersects and starts returns to back off timer, source node is first deleted the intersection of this node, then deletes local the intersection by the Path message informing intermediate node of signaling, until destination node is deleted local the intersection; When returning to back off timer and overflowing, start Returning process.
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| CN105530133B (en) * | 2015-12-22 | 2018-09-21 | 武汉大学 | A kind of Electric control business intelligence restoration methods |
| CN106160844B (en) * | 2016-08-19 | 2018-09-11 | 中国南方电网有限责任公司 | The test method and device of automatically switching optical networks channel transceiver path consistency |
| CN109155756B (en) * | 2016-10-31 | 2020-10-23 | 华为技术有限公司 | Method and system for adding electrical layer resources |
| CN106506357A (en) * | 2016-12-06 | 2017-03-15 | 国网河南省电力公司信息通信公司 | A kind of double route collocation method of power telecom network and device |
| CN110392318B (en) * | 2019-07-29 | 2021-10-19 | 烽火通信科技股份有限公司 | Method and system for checking control plane layer LSP (Label switched Path) in ASON (automatic switched optical network) |
| CN113037623B (en) * | 2019-12-24 | 2022-06-24 | 华为技术有限公司 | Time delay processing method, equipment and system |
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