The consistent implementation method in service signal transmitting-receiving path during the power telecom network business recovery
Technical field
The present invention relates to ASON, the consistent implementation method in service signal transmitting-receiving path when 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) adopt the power telecom network of being set up by ASON to transmit usually.
As everyone knows; generally all be provided with protective relaying device (Relay Protection Equipment) in electric power system; fault has occured in the force device in electric power system (as generator, circuit etc.) or electric power system itself; in the time of may jeopardizing safe operation of power system; protective relaying device can in time send alarm signal to operator by power telecom network; perhaps directly send the service signals such as trip signal to the circuit breaker of controlling, thereby avoid resulting in greater loss.During protective relaying device work; can constantly carry out sampling processing to the service signal in power telecom network; and calculate transmission time delay difference between the sending and receiving signal; if the transmission time delay difference of sending and receiving signal surpasses the threshold value of setting; malfunction will occur 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, unimpeded for the communication that should recover network when communication failure occurs in power telecom 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 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 that breaks down.But; the mode of this dynamic recovery may face the risk that causes the protective relaying device malfunction; reason is: control plane is a distributed system; article one, the foundation of business need to arrange by the signaling harmonizing route and the label selection from a plurality of control plane nodes of source to destination; in the situation that do not consider transmission delay, a business of dynamically recovering is from fault to the time that returns to the about 100ms of fast needs.Therefore, for the 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 of business is different, thereby causes the delay inequality of sending and receiving signal very likely to surpass the threshold value of setting, and causes 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 the protective relaying device malfunction because service signal transmitting-receiving path difference causes the transmission time delay difference of service signal to surpass threshold value, and then cause the problem of large area blackout.
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; when business occurs dynamically to recover; adopt the mode of building (Delete Before Reroute) of first deleting afterwards; namely first the transmitting-receiving intersection of fault business is deleted; make business all there is no signal in transmitting-receiving on the path; and then the recovery flow process of initiation fault business; the receiving and transmitting signal of recovery business is 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 during the power telecom network business recovery, described method step is as follows:
When in a, network, business broke down, malfunctioning node dynamically recovered by the Notify message informing source node in signaling;
After b, source node received that type is the Notify message of fault, deletion is local to intersect and starts the back off timer that dynamically recovers, and source node intersects by the deletion of the Path message informing intermediate node in signaling is local;
After c, intermediate node were received the Path message that source node sends, the local intersection of deletion also sent local intersection of Path message informing destination node deletion to destination node;
After d, destination node were received the Path message that intermediate node sends, deletion is local to intersect and notifies successively intermediate node and source node by the Resv message in signaling local to intersect deletion complete;
E, when 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 during above-mentioned power telecom network business recovery, if the type of service of e described reroute service of step is:
Not recoverable dynamic heavy-route when the back off timer of source node overflows, is initiated the dynamically business Establishing process of recovery, and after business was set up and completed, the channel information of deletion faulty channel LSP also discharged the time interval resource that faulty channel LSP uses;
Recoverable dynamic heavy-route when the back off timer of source node overflows, is initiated the dynamically business Establishing process of recovery, after business is set up and completed, 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 during 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 immediately and return to timer, when returning to timer and overflow, start the resource inspection, at first carry out the local resource inspection of source node, send Path message informing intermediate node; Intermediate node carries out the local resource inspection of intermediate node after receiving the Path message that source node sends, and sends Path message informing destination node; Destination node carries out the local resource inspection of destination node after receiving the Path message that intermediate node sends, and sends Notify message informing source node resource inspection success; After source node is received 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 by local intersection of Path message informing intermediate node deletion of signaling, intersects until the destination node deletion is local; When returning to back off timer and overflowing, start Returning process.
The consistent implementation method in service signal transmitting-receiving path during power telecom network business recovery provided by the invention, because of adopt first delete the mode of building afterwards when making business recovery the 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 the electric power ASON simultaneously, and have the potentiality of the larger economic benefit of generation.
Description of 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 the type business in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is made detailed explanation.
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 the 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 one:
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.
After a, intermediate node are received failure message, dynamically recover by the Notify message informing source node in signaling;
After b, source node were received the Notify message that intermediate node sends, deletion is local to intersect and starts the back off timer that dynamically recovers, and source node is by the deletion of the Path message informing intermediate node in signaling this locality intersection;
After c, intermediate node were received the Path message that source node sends, the local intersection of deletion also sent local intersection of Path message informing destination node deletion to destination node;
After d, destination node were received the Path message that intermediate node sends, deletion is local to intersect and notifies successively intermediate node and source node by the Resv message in signaling local to intersect deletion complete;
E, when the back off timer of source node overflows, start the dynamic recovery of fault business, recover the reroute service of fault.
Embodiment two:
Figure 2 shows that the Returning process figure that returns to the type business, the sequencing of corresponding time of arrow direction from high to low in this flow chart.
A, intermediate node start the business Returning process by the Notify message informing source node in signaling after receiving the message of former fault disappearance;
After b, source node are received the Notify message that intermediate node sends, start immediately and return to timer, when returning to timer and overflow, start the resource inspection, at first carry out the local resource inspection of source node, resource inspection success sends Path message informing intermediate node; Intermediate node carries out the local resource inspection of intermediate node after receiving the Path message that source node sends, and resource inspection success sends Path message informing destination node; Destination node carries out the local resource inspection of destination node after receiving the Path message that intermediate node sends, and resource inspection success sends Notify message informing source node resource inspection success; After source node was received the resource inspection success Notify message that destination node sends, deletion is local to intersect and starts and return to back off timer, and source node is first deleted the intersection of this node, then the Path message informing intermediate node deletion this locality intersection by signaling;
After c, intermediate node were received the Path message that source node sends, the local intersection of deletion also sent local intersection of Path message informing destination node deletion to destination node;
After d, destination node were received the Path message that intermediate node sends, deletion is local to intersect and notifies successively intermediate node and source node by the Resv message in signaling local to intersect deletion complete;
E, when 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.