CN101771488A - Method, system and equipment for improving reliability of multi-service transport network - Google Patents
Method, system and equipment for improving reliability of multi-service transport network Download PDFInfo
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Abstract
The invention discloses a method, a system and equipment for improving reliability of a multi-service transport network. The method comprises the following steps that: two nodes which serve the same service and have a main and standby relation are used as a protection group, and a protection group logo corresponding to the service is set; a special T-CONT frame corresponding to the protection group logo loads the service, wherein the two nodes in the protection group share the special T-CONT frame; and the two nodes perform synchronization through communication channels between the two nodes. Due to the adoption of the method, the system and the equipment for improving the reliability of the multi-service transport network, redundancy protection for the nodes of the multi-service transport network can be realized, and the reliability of the multi-service transport network can be improved.
Description
Technical field
The present invention relates to data communication technology, be specifically related to a kind of method, system and equipment that improves reliability of multi-service transport network.
Background technology
Along with the development of the network communications technology, existing network can carry multiple business, as voice, video, online game, network browsing etc.In recent years, network bandwidth requirements increases with index law, though the operator by constantly expanding band width in physical and correlation technique, has improved the network carrying and transmitted the ability of data, the increase of band width in physical always lags behind the requirement of user for transfer of data.Under the impact of big data quantity, how to guarantee the reliability of network carrying multiple business transmission and the QoS (Quality ofService, service quality) of corresponding service, carried out a lot of research work.Over the past two years, each big telecommunications operator has mostly selected (the Gigabit-Passive Optical Network with GPON, gigabit passive optical network) inserts (FTTx as following big band optical fiber, Fiber To The Building/Cabinet/Curb/Home, the access of various ways such as Fiber To The Building, roadside rack, family) solution.On the one hand, the bandwidth of MAN is had higher requirement, on the other hand, require MAN to possess the ability of docking, support the development of following FTTx with GPON.
Present MAN, NG-SDH (Next Generation Synchronous DigitalHierarchy is arranged, synchronous digital hierarchy of future generation), Metro-WDM (Metro Wavelength DivisionMultiplexing, metropolitan area wavelength division multiplexing), two layers of various ways such as Ethernet.Multiple load mode is also deposited, and the bearing technology kind is many, and service transparency is poor; There is not in real time dynamic control protocol, the maintenance management difficulty; Do not have real-time dynamic bandwidth to adjust mechanism, network bandwidth utilance is low, does not have strict QoS to guarantee, BOD (Bandwidth On Demand, the bandwidth on-demand) business of big bandwidth is difficult to satisfy.
For this reason, the present patent application people has proposed a kind of multi-service transmitting network network framework in the patent application of having submitted to.This network layer includes service adapting layer, channel layer and physical layer three-decker.Wherein, service adapting layer is responsible for miscellaneous service is carried out the encapsulation and the decapsulation of Unified Form, and the miscellaneous service unification is encapsulated as the GEM frame of expansion, and requires to specify in network the professional unique sign of each bar.According to type of service, priority and destination address etc., the GEM frame of a plurality of expansions is formed dissimilar transmission container (T-CONT) frames, add that path overhead constitutes channel layer, can realize alarm end to end and conveying function monitoring to channel layer.All T-CONT frames are formed transmission convergence layer (TC) frame, add physical layer overhead, comprise frame head synchronously, fields such as administration overhead and bandwidth map, to make things convenient in the network main frame to the communication and the management of each node, the convenient distribution time slot of adjusting each T-CONT frame is realized the dynamic bandwidth adjustment.
As shown in Figure 1, be this network typical application scene.Wherein, node on the ring is divided into two kinds of N node (being also referred to as from node) and S nodes (being also referred to as host node), the N node is common decentralized service access node, as the N1 among the figure, N2, N3, N4, N5, wherein, from node N1, N5 by optical fiber and LAN (Local Area Network, local area network (LAN)) links to each other, from node N2, N3, N4 is TDM (TimeDivision Multiplex, time division multiplexing)/ATM (Asynchronous Transfer Mode, asynchronous transfer mode)/the professional access node of ETH (Ethernet, Ethernet).The S node is except the function that possesses the N node, and is still and the node of upper layer network butt joint, continuous as the S1 among the figure, S2 and BRAS (Broadband RemoteAccess Server, Broadband Remote Access Server).Any one node can be traditional up and down TDM business, Ethernet data business etc., PON (Passive Optical Network, EPON) can also be provided tributary interface, uplink service interfaces such as 10GE also are provided at the S node.The S node of this network architecture also is the concentrated controling management center of network except as the professional aggregation node.The S node is realized centralized configuration, management and the maintenance to the N node.The N node also needs system event unifications such as alarm, performance are reported the S node.
In this network architecture, the fault of S node will cause whole multi-service transmitting network business irrecoverable, and equally also there is the Single Point of Faliure problem in the N node, when single N node breaks down, can cause the branch line service disconnection of this node.Therefore, the reliability to multi-service transmitting network has proposed very high requirement.
Summary of the invention
The embodiment of the invention provides a kind of method, system and equipment that improves reliability of multi-service transport network, can improve the reliability of multi-service transmitting network.
The embodiment of the invention provides a kind of method that improves reliability of multi-service transport network, comprising:
Two nodes of serving same business and having main and standby relation as a protection group, and are set the protection group id of corresponding described business;
Special-purpose T-CONT frame by the described protection group id of correspondence carries described business, the shared described special-purpose T-CONT frame of two nodes in the described protection group;
Described two nodes are undertaken by the communication port between described two nodes synchronously.
The embodiment of the invention also provides a kind of system that improves reliability of multi-service transport network; comprise: by serving same business and having the protection group that two nodes of main and standby relation are formed; described protection group has the protection group id of corresponding described business; has communication port between two nodes in the described protection group; and the special-purpose T-CONT frame of the described protection group id of shared correspondence carries described business, undertaken synchronously by described communication port.
The embodiment of the invention also provides a kind of multi-service transmitting network node, comprising:
The request receiving element is used for receiving the resource allocation request from the node transmission from the Node Protection group;
Resource allocation unit is used for the resource allocation request according to the reception of described request receiving element, distributes corresponding described special-purpose T-CONT frame from the Node Protection group;
Notification unit is used for notifying the corresponding described special-purpose T-CONT frame from the Node Protection group that distributes described from node.
Method, system and the equipment of the raising reliability of multi-service transport network that the embodiment of the invention provides; by two nodes of serving same business in the multi-service transmitting network and having a main and standby relation as a protection group; has communication port between two nodes in the described protection group; and the T-CONT resource of the described business of shared correspondence is protected described business realizing; undertaken synchronously by described communication port, thereby improved reliability of multi-service transport network.
Description of drawings
Fig. 1 is the application scenarios schematic diagram of multi-service transmitting network network;
Fig. 2 is the flow chart that the embodiment of the invention improves the method for reliability of multi-service transport network;
Fig. 3 is the state variation schematic diagram when the S node is in initial condition in the method for the embodiment of the invention;
Fig. 4 is the state variation schematic diagram when the S node is in Status of Backups in the method for the embodiment of the invention;
Fig. 5 is the state variation schematic diagram when the S node is in major state in the method for the embodiment of the invention;
Fig. 6 is the realization flow figure that in the embodiment of the invention business of N node is protected;
Fig. 7 is the schematic diagram that the method for the embodiment of the invention is applied to dual-homed protection scene;
Fig. 8 is a kind of structural representation that the embodiment of the invention improves the system of reliability of multi-service transport network;
Fig. 9 is the structural representation of host node in the system of the embodiment of the invention.
Embodiment
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.
By the introduction in the background technology as can be known, have two category nodes on the multi-service transmitting network: host node or be called the S node, from node or be called the N node.Wherein, host node also is the concentrated controling management center of network except as the professional aggregation node, realizes centralized configuration, management and maintenance from node; The N node is common decentralized service access node.The embodiment of the invention improves the method for reliability of multi-service transport network, and two nodes of serving same business and having main and standby relation as a protection group, and are set the protection group id of corresponding described business; Special-purpose T-CONT frame by the described protection group id of correspondence carries described business, the shared described special-purpose T-CONT frame of two nodes in the described protection group; Described two nodes are undertaken by the communication port between described two nodes synchronously.Wherein, described two nodes with main and standby relation can be two host nodes, also can be two from node.To describe with this two category node respectively below.
As shown in Figure 2, be a kind of flow process that improves the method for reliability of multi-service transport network of the present invention.Comprise:
Described two nodes with main and standby relation can be two host nodes, also can be two from node.For host node, because it is not only as professional aggregation node, and carrying is to the functions such as centralized configuration, management and maintenance from node, all all need to transmit required bandwidth etc. to the host node requested service from node, therefore can set a default identification as the protection group id for described host node; For from node,, can set the protection group id of corresponding protected business owing to be decentralized service access node.
The method of the embodiment of the invention is formed the protection groups by two nodes will serving same business and have a main and standby relation, realizes the protection to business, can improve reliability of multi-service transport network.
Need to prove, when having a plurality of candidate S node in the multi-service transmitting network, also can determine one of them S node as host node, exercise management control right, other S nodes are as the active and standby node of use, protection group of these S nodes compositions.
Like this, when host node just often, exercise management control right by described host node, that is to say that described host node manages control to the N node on the multi-service transmitting network, such as the T-CONT frame that distributes bearer service by described host node for the N node.The active and standby management control result who obtains and preserve described host node by the communication port with described host node with node is such as bandwidth allocation information.The active and standby request that does not respond the N node with node.When the host node fault or when initiatively withdrawing from major state, one active and standby takes over the management control right of described host node with node, and manages control according to the management control result of the described host node of preserving.
When host node broke down or initiatively withdraw from major state, the S node of re-electing a high priority was as host node.
Such as, when predetermined period can not receive the announcement of host node continuously, determine that described host node breaks down, re-elect host node, when perhaps host node initiatively withdraws from major state, to the whole network message that notifies, notify other active and standby nodes of using, need re-elect host node this moment.Each S node reaches the priority of other S nodes according to oneself, determines that the highest S node of priority is as host node.
When determining host node, multiple mode can be arranged, determine described host node such as the mode of dynamically election; Perhaps specify and produce described host node etc., this be will be discussed in more detail below by the user.
One, dynamically elects host node
When having a plurality of candidate S node on the multi-service transmitting network, can define a kind of dynamic election mechanism, select a host node.Particularly, to priority of each S node definition, regularly to the whole network message that notifies, described notice message is used to announce the priority of described S node self to the higher S node of priority during election.Like this, each S node reaches the priority of other S nodes according to oneself, determines that the highest S node of priority is as host node.
Above-mentioned dynamic election mechanism can be called SRP (Super-node Redundancy Protocol), and set following protocol parameter:
Transmit net ID:S node identification;
The Priority:S node priority is used to elect host node, and the big more priority of numerical value is high more.Span is 0-255, and default value is 100.The 255th, retention, when " transmit net ID "=0 of S node, priority is configured to 255.Priority 0 is retention, is used for former host node declaration and withdraws from major state; When the priority of two nodes was identical, what " transmitting network mark knows " value was less was excellent;
Adver_Interval: the notice message transmission time interval, in the Frame cycle of multi-service transmitting network, promptly every Adver_Interval frame sent out notice message one time;
Master_Time: slave node is monitored the time that the identification host node lost efficacy, and in the individual frame period of value (3*Adver_Interval+256-Priority), maximum occurrences is 3*255+256-255=766 frame period, is 95.75ms; Minimum value is 3*1+1=4 frame period, i.e. 0.5ms.
From above-mentioned definition, the switching time of S node is relevant with Adver_Interval and Priority, and the user can adjust parameter to reach the performance requirement that needs.
Host node is the cycle to send notice message with Interval, to the existence of the whole network broadcasting oneself.
Described notice message can use existing P LOAM (Physical Operation, Administrationand Maintenance, physical layer operations, management and maintenance) message format, and is defined as follows:
In described SRP agreement, two timer: Master_Timer and Adver_Timer can also be set.Wherein:
The Master_Fail_Timer timer is in the Master_Time time-out time, if the host node notice message that does not receive will trigger masterslave switchover;
The Adver_Timer timer is the cycle to send notice message with Adver_Interval.
Each S node has three kinds of states, initial condition (Init), major state (Master), Status of Backups (Backup).With the S node do not participate in active and standby election, state when also not possessing management control right is defined as initial condition, the S node begins to participate in election after initial condition is received the startup incident.
Before the S node starts or after withdrawing from Status of Backups, be in initial condition, this moment, the S node did not have management control right.
State variation schematic diagram when the S node is in initial condition is as shown in Figure 3:
The S node begins to participate in active and standby election after receiving the startup incident, and the record current state information.
If the priority of S node is 255, then carry out following steps:
1, sends a notice message;
2, the timing time that Adver_Timer is set is Adver_Interval, and picks up counting;
3, state transition is taken over the looped network control to major state, receives the resource request of N node.
If the priority of S node is not 255, then carry out following steps:
1, the timing time Master_Time of Master_Fail_Timer is set, and picks up counting;
2, state transition is to Status of Backups.
State variation schematic diagram when the S node is in Status of Backups is as shown in Figure 4:
Being in the S node of Status of Backups, mainly is the upstate that monitors host node, does not handle the request of N node, preserves the bandwidth allocation information of host node simultaneously.When in stable condition, it receives only notice message, does not send notice message.
When the S node is in Status of Backups,
If receive close event (when node is deleted or when withdrawing from active and standby election, triggering close event from network), then carry out following steps:
1, withdraws from Master_Fail_Timer;
2, state transition is to initial condition.
If the Master_Fail_Timer timer triggers, then carry out following steps:
1, sends a notice message;
2, the timing time that Adver_Timer is set is Adve_Interval, and picks up counting;
3, state transition is taken over the looped network control to major state, receives the resource request of N node.；
4, preserve the bandwidth allocation information and the T-CONT resource of present frame, begin to upgrade bandwidth allocation information from following one-period.
If receive notice message, and the priority in the described notice message equals 0 (when host node breaks down or initiatively withdraw from major state, priority in the notice message that sends is 0), the timing time that Master_Fail_Timer then is set is (256-Priority), and picks up counting.
If receive notice message, and the priority in the described notice message is not equal to 0, and more than or equal to the priority of this node, then Master_Fail_Timer timer reclocking, timing time is Master_Time.
If receive notice message, and the priority in the described notice message is not equal to 0, and less than the priority of this node, then abandons the notice message of reception.
State variation schematic diagram when the S node is in major state is as shown in Figure 5:
The S node that is in major state has the control and management power of looped network, receives the request of handling the N node, carries out allocated bandwidth.
When the S node is in major state,
If receive close event, then carry out following steps:
1, withdraws from Adver_Timer;
2, send a notice message, the priority in the message is 0;
3, state transition discharges the looped network management control right to initial condition.
If the Adver_Timer timer triggers, perhaps receive notice message, and the priority in the described notice message equals 0, then carry out following steps:
1, sends a notification packet;
2, Adver_Timer timer reclocking, timing time are Adver_Interval.
If receive notice message, and the priority in the described notice message is not equal to 0, and following two kinds of situations are then arranged:
I. the priority in the described notice message is greater than the priority of this node, perhaps the priority in the notice message equal the priority of this node but the transmission net ID of node that sends notice message less than the transmission net ID of this node), then carry out following steps:
1, withdraws from Adver_Timer;
2, the timing time that Master_Fail_Timer is set is Master_Time, and picks up counting;
3, state transition discharges the looped network management control right to Status of Backups.
II. do not satisfy the condition among the above-mentioned I, then abandon the notice message of reception.
Two, specify the generation host node by the user
Usually have only two S nodes on the multi-service transmitting network, the activestandby state that the user can designated host.Under the normal condition, host node has looped network control and management power, the active and standby nodes records state information of using.When the host node fault (such as, active and standby when can not receive host node message with the continuous predetermined period of node, determine the host node fault) or when initiatively withdrawing from major state, management control right is begun to take over by the slave node of user's appointment, allocated bandwidth result by active and standby with node calculating and sending cloth.Active and standby becoming with node uses behind the operating conditions bandwidth allocation information before switching to proceed bandwidth calculation and distribution.Host node also can initiatively initiate to switch (triggering as the user), and notice S part slave node is taken over the looped network control.
In this embodiment, described host node has default identification, and the N node sends request by described default identification to host node.
The method of the raising reliability of multi-service transport network that the embodiment of the invention provides when having a plurality of candidate S node in multi-service transmitting network, for the S node provides redundancy backup, provides the protection to node control power.When host node just often, exercise management control right by described host node, when the host node fault, the active and standby management control right of taking over described host node with node, thereby guaranteed the S reliability of nodes, guaranteed of centralized configuration, management and the maintenance of S node the N node.
In embodiments of the present invention, can also protect the business of N node, as shown in Figure 6, be the realization flow of among this embodiment the business of N node being protected, and may further comprise the steps:
Step 601, with two N nodes of serving same business and having a main and standby relation as a protection group, and set the protection group id of corresponding described business, a N node conduct in the described protection group is from node, and another N node conduct is from secondary node;
Step 602 is distributed the special-purpose T-CONT frame of corresponding described protection group id, the shared described special-purpose T-CONT frame of the N node in the described protection group;
Distribute the detailed process of special-purpose T-CONT frame of corresponding described protection group id as follows:
For in the protection group from node, use the protection group id to initiate resource allocation request to host node respectively.Need to prove that the source address of described resource allocation request is described protection group id, but not in the protection group from the node identification of node, destination address is the sign of host node, just foregoing default identification.
For host node, receive described resource allocation request after, distribute the special-purpose T-CONT frame of corresponding described protection group id, the special-purpose T-CONT frame of the corresponding described protection group id that will distribute then send in the described protection group from node.
Certainly, when deletion protection group, need initiate to discharge resource request to host node from node in the protection group.Equally, the source address of described resource release request is described protection group id, and destination address is described default identification.After host node is received the resource release request that sends from node in the protection group, discharge the special-purpose T-CONT frame of corresponding described protection group id.
Need to prove, after host node is received the bandwidth allocation request of first N node in the protection group (can be from node, also can be from secondary node), distribute the special-purpose T-CONT frame of corresponding described protection group id, in order to the business of carrying protection group; The request of second N node continues response.System should be well-determined to the T-CONT frame result of a protection set of dispense.If created business and distributed the T-CONT frame before creating the protection group, then system can use original T-CONT frame, perhaps redistributes new T-CONT frame.
Correct in order to guarantee the special-purpose T-CONT frame that the N node receives, can also carry out following processing:
If the N node in the described protection group is not received the special-purpose T-CONT frame (for example loop fault) of corresponding described protection group id, then repeat to send described resource allocation request, till the response of receiving host node;
If the N node in the described protection group has been received the special-purpose T-CONT frame of twice corresponding described protection group id, and twice special-purpose T-CONT frame is inconsistent, then to host node reporting system fault.
Step 603 is carried described business by the described corresponding special-purpose T-CONT frame of group id of protecting.
When described business enters multi-service transmitting network; describedly described business is carried out enhanced gigabit passive optical network GPON encapsulation from node; and the service bearer after will encapsulating sends in the special-purpose T-CONT frame of the described protection group id of correspondence; the source address of described special-purpose T-CONT frame is described protection group id, and destination address is described default identification.When described business is left multi-service transmitting network, from node it is removed the GEM encapsulation after, transfer to the corresponding service processing module and handle.
Need to prove, in order to guarantee to be provided with communication port from node with between the secondary node from node with from the state consistency of secondary node; Describedly undertaken synchronously by described communication port from node with from secondary node.To exchange to this locality through the special-purpose T-CONT frame of this node from node, will carry out direct punch-through process through the special-purpose T-CONT frame of this node from secondary node.Described communication port is specially: T-CONT passage independently, the T-CONT passage of perhaps protection group, perhaps the management control channel of multi-service transmitting network.When node breaks down, described business is switched to described when described from secondary node.
The redundancy backup of N node is mainly used in dual-homed protection scene, and as shown in Figure 7, on DSLAM (DigitalSubscriber Line Access Multiplexer, Digital Subscriber Line Access Multiplexer) dual homed to the two N node, N2 and N3 form the protection group.
N2 and N3 create protection group 1, the uplink service of protection DSLAM1, and system is its distribution T-CONT1; Create protection group 2, the uplink service of protection DSLAM2, system is its distribution T-CONT2.According to the activestandby state of N2 and N3, T-CONT1 or T-CONT2 both can be professional up and down from N2, also can be professional up and down from N3.
When having disposed a plurality of protection group on the node; because the service bearer of each protection group is in a pre-assigned special-purpose T-CONT; therefore the traffic failure of a protection group does not influence the business of other protection group of this node, that is to say, does not have the problem of linking switching.
The business of protection group might bandwidth change; this moment need be by the protection group initiate bandwidth adjustment request from node; situation as individual node is similar, and difference is to use the protection group id to initiate request as parameter from node, rather than the node identification of self.Can both receive the bandwidth allocation information of host node from node with from secondary node, after switching, also can the normal process business from secondary node, this moment, bandwidth change was again by initiating request from secondary node.
For N2 among Fig. 7 and N3, wherein, N2 is a host node, and N3 is a secondary node.When system was the T-CONT frame process N2 node of protection set of dispense, the T-CONT frame exchanged to local branch road through Cross module, is crossed to another line side after local branch road carries out Business Processing again; The T-CONT frame because N3 is in Status of Backups, need not carry out Business Processing in this locality during through the N3 node, so the T-CONT frame directly intersects break-through.
The method of the embodiment of the invention can also match with the route protection of multi-service transmitting network; route protection can adopt the protected mode of 1+1 or 1:1; for protection group business, the carrying out the choosing of dual transmitting and receiving or single-shot from node and receive of protection group, from the professional break-through of secondary node.When ring was gone up the service path variation, the main-standby nodes state was constant, does not influence the operating state of branch road.
Continuation is with reference to Fig. 7; when in the protection group from node and DSLAM link failure or when the time from node failure, from node and DSLAM by after the main-apparatus protection protocol negotiation, protection group business switch to the protection group from secondary node; become the break-through attitude from node, become the reception attitude from secondary node.May have non-protection professional on the host node this moment, and non-protection business will be interrupted after the fault.
When overtime, thinking all that from node with from secondary node the other side breaks down from node and the state synchronized between secondary node, the other side's state is changed to fault case, negotiate operating conditions with DSLAM again; Negotiation result may be normal in this case, also may be wrong, as two main attitudes;
When multi-service transmitting network line fault,, as previously mentioned, do not influence the state of protection group by the route protection of looped network.
As seen, utilize the method for the embodiment of the invention, can the business of N node be effectively protected.
In the above-described embodiments, mainly the service protection of N node in the multi-service transmitting network is described in detail, this method is equally applicable to the service protection to the S node.S node traffic protection is promptly when S node during as the business outlet of aggregation networks, the business that protection S node exports, and the protection process of basic skills and N node is similar, is not described in detail at this.
Need to prove that host node service protection and the protection of looped network control can be separate, the host node with looped network control can not be the host node of service protection.
Utilize the method for the embodiment of the invention, can realize effective protection, improve the reliability of multi-service transmitting network the multi-service transmitting network business.
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 finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The embodiment of the invention also provides a kind of system that improves reliability of multi-service transport network, as shown in Figure 8, is a kind of structural representation that the embodiment of the invention improves the system of reliability of multi-service transport network.
In this embodiment, described system comprises:
The S Node Protection group that a plurality of S nodes are formed for the sake of clarity, only shows two S nodes among Fig. 8, wherein S1 is as host node, and S2 is as the active and standby node of using, and S1 and S2 form the protection group, serve same business; Described host node is used for just often exercising management control right at self; The described active and standby node of using, be used for just often at described host node, obtain and preserve the management control result of host node by communication port with described host node, when described host node fault, take over the management control right of described host node, and manage control according to the management control result of the host node of preserving.
In actual applications, described host node can perhaps be specified generation by the user by dynamically electing, specifically can be with reference to the description in the method for the front embodiment of the invention.
The system of the embodiment of the invention when having a plurality of candidate S node in multi-service transmitting network, for the S node provides redundancy backup, provides the protection to node control power.When host node just often, exercise management control right by described host node, when the host node fault, the active and standby management control right of taking over described host node with node, thereby guaranteed the S reliability of nodes, guaranteed of centralized configuration, management and the maintenance of S node the N node.
In order further to improve the reliability of multi-service transmitting network, described system also comprises: serve same business and have the N Node Protection group of two N nodes compositions of main and standby relation, as shown in Figure 8, wherein, the N1 conduct is from node, and the N2 conduct is from secondary node.
In this embodiment, the structure of described host node comprises as shown in Figure 9:
Request receiving element 901 is used for receiving the resource allocation request that the N node of described N Node Protection group sends, and the source address of described resource allocation request is the sign of described N Node Protection group;
Like this, describedly just can carry described business by the special-purpose T-CONT frame of corresponding described N Node Protection group from node.
Further, described request receiving element 901 also is used for receiving the resource release request that the N node of protection group sends.Correspondingly, described host node also comprises: resource delete cells 904, be used for after described request receiving element 901 is received described resource release request, and delete the special-purpose T-CONT frame of corresponding described N Node Protection group.
In this embodiment, describedly also be used for when the service bandwidth of described N Node Protection group changes, use the sign of described N Node Protection group to initiate bandwidth adjustment request from node.
In order to guarantee from node with from the consistency of secondary node state, described from node with from also being provided with communication port between the secondary node, describedly also be used for being undertaken synchronously by described communication port from node with from secondary node.The described special-purpose T-CONT frame that also is used for passing through this node from node exchanges to this locality; The described special-purpose T-CONT frame that is used for passing through this node from secondary node carries out direct punch-through process; Describedly also be used for being undertaken synchronously by described communication port from node with from secondary node.
Further, describedly also be used for when described described business being switched to this node when node breaks down from secondary node.
Utilize the system of the embodiment of the invention, not only can carry out redundancy protecting, and can provide protection the business of N node to the S node in the multi-service transmitting network.
The system of the embodiment of the invention serves same business and has the protection group of two nodes compositions of main and standby relation, and the special-purpose T-CONT frame of the described business of the shared correspondence of node in the described protection group carries described business.The T-CONT resource of the described protection group of the shared correspondence of active and standby node is protected described business realizing, has improved reliability of multi-service transport network.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. a method that improves reliability of multi-service transport network is characterized in that, comprising:
Two nodes of serving same business and having main and standby relation as a protection group, and are set the protection group id of corresponding described business;
Special-purpose T-CONT frame by the described protection group id of correspondence carries described business, the shared described special-purpose T-CONT frame of two nodes in the described protection group;
Described two nodes are undertaken by the communication port between described two nodes synchronously.
2. method according to claim 1 is characterized in that, described communication port is specially:
The management control channel of the T-CONT passage of T-CONT passage or protection group or multi-service transmitting network independently.
3. method according to claim 1 is characterized in that, described two nodes are respectively host node and the active and standby node of using; Described method also comprises:
When described host node just often, by described host node described multi-service transmitting network is managed control, the described active and standby management control result who obtains and preserve described host node with node by described communication port;
When described host node fault or when initiatively withdrawing from major state, active and standbyly according to the management control result of the described main joint of preserving described multi-service transmitting network is managed control with node by described.
4. method according to claim 3 is characterized in that, described method also comprises: determine described host node and the active and standby node of using by dynamic election.
5. method according to claim 3 is characterized in that, described by described host node to described multi-service transmitting network manage control comprise:
The special-purpose T-CONT frame that distributes corresponding described protection group id by described host node.
6. method according to claim 1 is characterized in that, described two nodes are respectively from node with from secondary node; Described special-purpose T-CONT frame by the described protection group id of correspondence carries described business and comprises:
Describedly will exchange to this locality through the special-purpose T-CONT frame of this node from node;
Describedly will carry out direct punch-through process through the special-purpose T-CONT frame of this node from secondary node.
7. method according to claim 6 is characterized in that, describedly will exchange to this locality through the special-purpose T-CONT frame of this node from node and comprise:
When the arbitrary node of described business from described protection group enters multi-service transmitting network; describedly described business is carried out enhanced gigabit passive optical network GPON encapsulation, and the service bearer after will encapsulating sends in the special-purpose T-CONT frame of the described protection group id of correspondence from node.
8. method according to claim 6 is characterized in that, described method also comprises:
, when breaking down, switches from node with from secondary node protection node when described described.
9. a system that improves reliability of multi-service transport network is characterized in that, comprising:
By serving same business and having the protection group that two nodes of main and standby relation are formed; described protection group has the protection group id of corresponding described business; has communication port between two nodes in the described protection group; and the special-purpose T-CONT frame of the described protection group id of shared correspondence carries described business, undertaken synchronously by described communication port.
10. system according to claim 9 is characterized in that, described communication port is specially:
The management control channel of the T-CONT passage of T-CONT passage or protection group or multi-service transmitting network independently.
11. system according to claim 9 is characterized in that, described two nodes are respectively host node and the active and standby node of using;
Described host node, be used for just often at self, described multi-service transmitting network is managed control, comprise: described secondary node, be used for just often at described host node, the management control result who obtains and preserve described host node by described communication port in described host node fault or when initiatively withdrawing from major state, controls the result according to the management of the described main joint of preserving described multi-service transmitting network is managed control.
12. system according to claim 9 is characterized in that, described two nodes are respectively from node with from secondary node;
Described from node, be used for the special-purpose T-CONT frame through this node is exchanged to this locality;
Described from secondary node, be used for and will carry out direct punch-through process through the special-purpose T-CONT frame of this node, and described when node breaks down, protect and switch.
13. a multi-service transmitting network node is characterized in that, comprising:
The request receiving element is used for receiving the resource allocation request from the node transmission from the Node Protection group;
Resource allocation unit is used for the resource allocation request according to the reception of described request receiving element, distributes corresponding described special-purpose T-CONT frame from the Node Protection group;
Notification unit is used for notifying the corresponding described special-purpose T-CONT frame from the Node Protection group that distributes described from node.
14. multi-service transmitting network node according to claim 13 is characterized in that,
The described request receiving element also is used for receiving the resource release request from the node transmission from the Node Protection group;
Described multi-service transmitting network node also comprises:
The resource delete cells is used for after the described request receiving element is received described resource release request, the corresponding described special-purpose T-CONT frame from the Node Protection group of deletion.
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